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-rw-r--r--target/linux/patches/2.6.33/aufs2.patch24455
-rw-r--r--target/linux/patches/2.6.33/bsd-compatibility.patch2513
-rw-r--r--target/linux/patches/2.6.33/cc-abstract.patch14
-rw-r--r--target/linux/patches/2.6.33/cris-initrd.patch14
-rw-r--r--target/linux/patches/2.6.33/cygwin-compat.patch14
-rw-r--r--target/linux/patches/2.6.33/exmap.patch11
-rw-r--r--target/linux/patches/2.6.33/freebsd-compat.patch11
-rw-r--r--target/linux/patches/2.6.33/mtd-root.patch62
-rw-r--r--target/linux/patches/2.6.33/ocf.patch23653
-rw-r--r--target/linux/patches/2.6.33/startup.patch20
-rw-r--r--target/linux/patches/2.6.33/swconfig.patch1075
-rw-r--r--target/linux/patches/2.6.33/yaffs2.patch15066
12 files changed, 66908 insertions, 0 deletions
diff --git a/target/linux/patches/2.6.33/aufs2.patch b/target/linux/patches/2.6.33/aufs2.patch
new file mode 100644
index 000000000..6c40cfb81
--- /dev/null
+++ b/target/linux/patches/2.6.33/aufs2.patch
@@ -0,0 +1,24455 @@
+diff -Nur linux-2.6.31.5.orig/Documentation/ABI/testing/debugfs-aufs linux-2.6.31.5/Documentation/ABI/testing/debugfs-aufs
+--- linux-2.6.31.5.orig/Documentation/ABI/testing/debugfs-aufs 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/Documentation/ABI/testing/debugfs-aufs 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,40 @@
++What: /debug/aufs/si_<id>/
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ Under /debug/aufs, a directory named si_<id> is created
++ per aufs mount, where <id> is a unique id generated
++ internally.
++
++What: /debug/aufs/si_<id>/xib
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ It shows the consumed blocks by xib (External Inode Number
++ Bitmap), its block size and file size.
++ When the aufs mount option 'noxino' is specified, it
++ will be empty. About XINO files, see
++ Documentation/filesystems/aufs/aufs.5 in detail.
++
++What: /debug/aufs/si_<id>/xino0, xino1 ... xinoN
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ It shows the consumed blocks by xino (External Inode Number
++ Translation Table), its link count, block size and file
++ size.
++ When the aufs mount option 'noxino' is specified, it
++ will be empty. About XINO files, see
++ Documentation/filesystems/aufs/aufs.5 in detail.
++
++What: /debug/aufs/si_<id>/xigen
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ It shows the consumed blocks by xigen (External Inode
++ Generation Table), its block size and file size.
++ If CONFIG_AUFS_EXPORT is disabled, this entry will not
++ be created.
++ When the aufs mount option 'noxino' is specified, it
++ will be empty. About XINO files, see
++ Documentation/filesystems/aufs/aufs.5 in detail.
+diff -Nur linux-2.6.31.5.orig/Documentation/ABI/testing/sysfs-aufs linux-2.6.31.5/Documentation/ABI/testing/sysfs-aufs
+--- linux-2.6.31.5.orig/Documentation/ABI/testing/sysfs-aufs 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/Documentation/ABI/testing/sysfs-aufs 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,25 @@
++What: /sys/fs/aufs/si_<id>/
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ Under /sys/fs/aufs, a directory named si_<id> is created
++ per aufs mount, where <id> is a unique id generated
++ internally.
++
++What: /sys/fs/aufs/si_<id>/br0, br1 ... brN
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ It shows the abolute path of a member directory (which
++ is called branch) in aufs, and its permission.
++
++What: /sys/fs/aufs/si_<id>/xi_path
++Date: March 2009
++Contact: J. R. Okajima <hooanon05@yahoo.co.jp>
++Description:
++ It shows the abolute path of XINO (External Inode Number
++ Bitmap, Translation Table and Generation Table) file
++ even if it is the default path.
++ When the aufs mount option 'noxino' is specified, it
++ will be empty. About XINO files, see
++ Documentation/filesystems/aufs/aufs.5 in detail.
+diff -Nur linux-2.6.31.5.orig/fs/aufs/aufs.h linux-2.6.31.5/fs/aufs/aufs.h
+--- linux-2.6.31.5.orig/fs/aufs/aufs.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/aufs.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,51 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * all header files
++ */
++
++#ifndef __AUFS_H__
++#define __AUFS_H__
++
++#ifdef __KERNEL__
++
++#include "debug.h"
++
++#include "branch.h"
++#include "cpup.h"
++#include "dcsub.h"
++#include "dbgaufs.h"
++#include "dentry.h"
++#include "dir.h"
++#include "file.h"
++#include "fstype.h"
++#include "inode.h"
++#include "loop.h"
++#include "module.h"
++#include "opts.h"
++#include "rwsem.h"
++#include "spl.h"
++#include "super.h"
++#include "sysaufs.h"
++#include "vfsub.h"
++#include "whout.h"
++#include "wkq.h"
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/branch.c linux-2.6.31.5/fs/aufs/branch.c
+--- linux-2.6.31.5.orig/fs/aufs/branch.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/branch.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,974 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * branch management
++ */
++
++#include <linux/file.h>
++#include "aufs.h"
++
++/*
++ * free a single branch
++ */
++static void au_br_do_free(struct au_branch *br)
++{
++ int i;
++ struct au_wbr *wbr;
++
++ if (br->br_xino.xi_file)
++ fput(br->br_xino.xi_file);
++ mutex_destroy(&br->br_xino.xi_nondir_mtx);
++
++ AuDebugOn(atomic_read(&br->br_count));
++
++ wbr = br->br_wbr;
++ if (wbr) {
++ for (i = 0; i < AuBrWh_Last; i++)
++ dput(wbr->wbr_wh[i]);
++ AuDebugOn(atomic_read(&wbr->wbr_wh_running));
++ AuRwDestroy(&wbr->wbr_wh_rwsem);
++ }
++
++ /* some filesystems acquire extra lock */
++ lockdep_off();
++ mntput(br->br_mnt);
++ lockdep_on();
++
++ kfree(wbr);
++ kfree(br);
++}
++
++/*
++ * frees all branches
++ */
++void au_br_free(struct au_sbinfo *sbinfo)
++{
++ aufs_bindex_t bmax;
++ struct au_branch **br;
++
++ AuRwMustWriteLock(&sbinfo->si_rwsem);
++
++ bmax = sbinfo->si_bend + 1;
++ br = sbinfo->si_branch;
++ while (bmax--)
++ au_br_do_free(*br++);
++}
++
++/*
++ * find the index of a branch which is specified by @br_id.
++ */
++int au_br_index(struct super_block *sb, aufs_bindex_t br_id)
++{
++ aufs_bindex_t bindex, bend;
++
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex <= bend; bindex++)
++ if (au_sbr_id(sb, bindex) == br_id)
++ return bindex;
++ return -1;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * add a branch
++ */
++
++static int test_overlap(struct super_block *sb, struct dentry *h_d1,
++ struct dentry *h_d2)
++{
++ if (unlikely(h_d1 == h_d2))
++ return 1;
++ return !!au_test_subdir(h_d1, h_d2)
++ || !!au_test_subdir(h_d2, h_d1)
++ || au_test_loopback_overlap(sb, h_d1, h_d2)
++ || au_test_loopback_overlap(sb, h_d2, h_d1);
++}
++
++/*
++ * returns a newly allocated branch. @new_nbranch is a number of branches
++ * after adding a branch.
++ */
++static struct au_branch *au_br_alloc(struct super_block *sb, int new_nbranch,
++ int perm)
++{
++ struct au_branch *add_branch;
++ struct dentry *root;
++
++ root = sb->s_root;
++ add_branch = kmalloc(sizeof(*add_branch), GFP_NOFS);
++ if (unlikely(!add_branch))
++ goto out;
++
++ add_branch->br_wbr = NULL;
++ if (au_br_writable(perm)) {
++ /* may be freed separately at changing the branch permission */
++ add_branch->br_wbr = kmalloc(sizeof(*add_branch->br_wbr),
++ GFP_NOFS);
++ if (unlikely(!add_branch->br_wbr))
++ goto out_br;
++ }
++
++ if (unlikely(au_sbr_realloc(au_sbi(sb), new_nbranch)
++ || au_di_realloc(au_di(root), new_nbranch)
++ || au_ii_realloc(au_ii(root->d_inode), new_nbranch)))
++ goto out_wbr;
++ return add_branch; /* success */
++
++ out_wbr:
++ kfree(add_branch->br_wbr);
++ out_br:
++ kfree(add_branch);
++ out:
++ return ERR_PTR(-ENOMEM);
++}
++
++/*
++ * test if the branch permission is legal or not.
++ */
++static int test_br(struct inode *inode, int brperm, char *path)
++{
++ int err;
++
++ err = 0;
++ if (unlikely(au_br_writable(brperm) && IS_RDONLY(inode))) {
++ AuErr("write permission for readonly mount or inode, %s\n",
++ path);
++ err = -EINVAL;
++ }
++
++ return err;
++}
++
++/*
++ * returns:
++ * 0: success, the caller will add it
++ * plus: success, it is already unified, the caller should ignore it
++ * minus: error
++ */
++static int test_add(struct super_block *sb, struct au_opt_add *add, int remount)
++{
++ int err;
++ aufs_bindex_t bend, bindex;
++ struct dentry *root;
++ struct inode *inode, *h_inode;
++
++ root = sb->s_root;
++ bend = au_sbend(sb);
++ if (unlikely(bend >= 0
++ && au_find_dbindex(root, add->path.dentry) >= 0)) {
++ err = 1;
++ if (!remount) {
++ err = -EINVAL;
++ AuErr("%s duplicated\n", add->pathname);
++ }
++ goto out;
++ }
++
++ err = -ENOSPC; /* -E2BIG; */
++ if (unlikely(AUFS_BRANCH_MAX <= add->bindex
++ || AUFS_BRANCH_MAX - 1 <= bend)) {
++ AuErr("number of branches exceeded %s\n", add->pathname);
++ goto out;
++ }
++
++ err = -EDOM;
++ if (unlikely(add->bindex < 0 || bend + 1 < add->bindex)) {
++ AuErr("bad index %d\n", add->bindex);
++ goto out;
++ }
++
++ inode = add->path.dentry->d_inode;
++ err = -ENOENT;
++ if (unlikely(!inode->i_nlink)) {
++ AuErr("no existence %s\n", add->pathname);
++ goto out;
++ }
++
++ err = -EINVAL;
++ if (unlikely(inode->i_sb == sb)) {
++ AuErr("%s must be outside\n", add->pathname);
++ goto out;
++ }
++
++ if (unlikely(au_test_fs_unsuppoted(inode->i_sb))) {
++ AuErr("unsupported filesystem, %s (%s)\n",
++ add->pathname, au_sbtype(inode->i_sb));
++ goto out;
++ }
++
++ err = test_br(add->path.dentry->d_inode, add->perm, add->pathname);
++ if (unlikely(err))
++ goto out;
++
++ if (bend < 0)
++ return 0; /* success */
++
++ err = -EINVAL;
++ for (bindex = 0; bindex <= bend; bindex++)
++ if (unlikely(test_overlap(sb, add->path.dentry,
++ au_h_dptr(root, bindex)))) {
++ AuErr("%s is overlapped\n", add->pathname);
++ goto out;
++ }
++
++ err = 0;
++ if (au_opt_test(au_mntflags(sb), WARN_PERM)) {
++ h_inode = au_h_dptr(root, 0)->d_inode;
++ if ((h_inode->i_mode & S_IALLUGO) != (inode->i_mode & S_IALLUGO)
++ || h_inode->i_uid != inode->i_uid
++ || h_inode->i_gid != inode->i_gid)
++ AuWarn("uid/gid/perm %s %u/%u/0%o, %u/%u/0%o\n",
++ add->pathname,
++ inode->i_uid, inode->i_gid,
++ (inode->i_mode & S_IALLUGO),
++ h_inode->i_uid, h_inode->i_gid,
++ (h_inode->i_mode & S_IALLUGO));
++ }
++
++ out:
++ return err;
++}
++
++/*
++ * initialize or clean the whiteouts for an adding branch
++ */
++static int au_br_init_wh(struct super_block *sb, struct au_branch *br,
++ int new_perm, struct dentry *h_root)
++{
++ int err, old_perm;
++ aufs_bindex_t bindex;
++ struct mutex *h_mtx;
++ struct au_wbr *wbr;
++ struct au_hinode *hdir;
++
++ wbr = br->br_wbr;
++ old_perm = br->br_perm;
++ br->br_perm = new_perm;
++ hdir = NULL;
++ h_mtx = NULL;
++ bindex = au_br_index(sb, br->br_id);
++ if (0 <= bindex) {
++ hdir = au_hi(sb->s_root->d_inode, bindex);
++ au_hin_imtx_lock_nested(hdir, AuLsc_I_PARENT);
++ } else {
++ h_mtx = &h_root->d_inode->i_mutex;
++ mutex_lock_nested(h_mtx, AuLsc_I_PARENT);
++ }
++ if (!wbr)
++ err = au_wh_init(h_root, br, sb);
++ else {
++ wbr_wh_write_lock(wbr);
++ err = au_wh_init(h_root, br, sb);
++ wbr_wh_write_unlock(wbr);
++ }
++ if (hdir)
++ au_hin_imtx_unlock(hdir);
++ else
++ mutex_unlock(h_mtx);
++ br->br_perm = old_perm;
++
++ if (!err && wbr && !au_br_writable(new_perm)) {
++ kfree(wbr);
++ br->br_wbr = NULL;
++ }
++
++ return err;
++}
++
++static int au_wbr_init(struct au_branch *br, struct super_block *sb,
++ int perm, struct path *path)
++{
++ int err;
++ struct au_wbr *wbr;
++
++ wbr = br->br_wbr;
++ au_rw_init(&wbr->wbr_wh_rwsem);
++ memset(wbr->wbr_wh, 0, sizeof(wbr->wbr_wh));
++ atomic_set(&wbr->wbr_wh_running, 0);
++ wbr->wbr_bytes = 0;
++
++ err = au_br_init_wh(sb, br, perm, path->dentry);
++
++ return err;
++}
++
++/* intialize a new branch */
++static int au_br_init(struct au_branch *br, struct super_block *sb,
++ struct au_opt_add *add)
++{
++ int err;
++
++ err = 0;
++ memset(&br->br_xino, 0, sizeof(br->br_xino));
++ mutex_init(&br->br_xino.xi_nondir_mtx);
++ br->br_perm = add->perm;
++ br->br_mnt = add->path.mnt; /* set first, mntget() later */
++ atomic_set(&br->br_count, 0);
++ br->br_xino_upper = AUFS_XINO_TRUNC_INIT;
++ atomic_set(&br->br_xino_running, 0);
++ br->br_id = au_new_br_id(sb);
++
++ if (au_br_writable(add->perm)) {
++ err = au_wbr_init(br, sb, add->perm, &add->path);
++ if (unlikely(err))
++ goto out;
++ }
++
++ if (au_opt_test(au_mntflags(sb), XINO)) {
++ err = au_xino_br(sb, br, add->path.dentry->d_inode->i_ino,
++ au_sbr(sb, 0)->br_xino.xi_file, /*do_test*/1);
++ if (unlikely(err)) {
++ AuDebugOn(br->br_xino.xi_file);
++ goto out;
++ }
++ }
++
++ sysaufs_br_init(br);
++ mntget(add->path.mnt);
++
++ out:
++ return err;
++}
++
++static void au_br_do_add_brp(struct au_sbinfo *sbinfo, aufs_bindex_t bindex,
++ struct au_branch *br, aufs_bindex_t bend,
++ aufs_bindex_t amount)
++{
++ struct au_branch **brp;
++
++ AuRwMustWriteLock(&sbinfo->si_rwsem);
++
++ brp = sbinfo->si_branch + bindex;
++ memmove(brp + 1, brp, sizeof(*brp) * amount);
++ *brp = br;
++ sbinfo->si_bend++;
++ if (unlikely(bend < 0))
++ sbinfo->si_bend = 0;
++}
++
++static void au_br_do_add_hdp(struct au_dinfo *dinfo, aufs_bindex_t bindex,
++ aufs_bindex_t bend, aufs_bindex_t amount)
++{
++ struct au_hdentry *hdp;
++
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ hdp = dinfo->di_hdentry + bindex;
++ memmove(hdp + 1, hdp, sizeof(*hdp) * amount);
++ au_h_dentry_init(hdp);
++ dinfo->di_bend++;
++ if (unlikely(bend < 0))
++ dinfo->di_bstart = 0;
++}
++
++static void au_br_do_add_hip(struct au_iinfo *iinfo, aufs_bindex_t bindex,
++ aufs_bindex_t bend, aufs_bindex_t amount)
++{
++ struct au_hinode *hip;
++
++ AuRwMustWriteLock(&iinfo->ii_rwsem);
++
++ hip = iinfo->ii_hinode + bindex;
++ memmove(hip + 1, hip, sizeof(*hip) * amount);
++ hip->hi_inode = NULL;
++ au_hin_init(hip, NULL);
++ iinfo->ii_bend++;
++ if (unlikely(bend < 0))
++ iinfo->ii_bstart = 0;
++}
++
++static void au_br_do_add(struct super_block *sb, struct dentry *h_dentry,
++ struct au_branch *br, aufs_bindex_t bindex)
++{
++ struct dentry *root;
++ struct inode *root_inode;
++ aufs_bindex_t bend, amount;
++
++ root = sb->s_root;
++ root_inode = root->d_inode;
++ au_plink_block_maintain(sb);
++ bend = au_sbend(sb);
++ amount = bend + 1 - bindex;
++ au_br_do_add_brp(au_sbi(sb), bindex, br, bend, amount);
++ au_br_do_add_hdp(au_di(root), bindex, bend, amount);
++ au_br_do_add_hip(au_ii(root_inode), bindex, bend, amount);
++ au_set_h_dptr(root, bindex, dget(h_dentry));
++ au_set_h_iptr(root_inode, bindex, au_igrab(h_dentry->d_inode),
++ /*flags*/0);
++}
++
++int au_br_add(struct super_block *sb, struct au_opt_add *add, int remount)
++{
++ int err;
++ unsigned long long maxb;
++ aufs_bindex_t bend, add_bindex;
++ struct dentry *root, *h_dentry;
++ struct inode *root_inode;
++ struct au_branch *add_branch;
++
++ root = sb->s_root;
++ root_inode = root->d_inode;
++ IMustLock(root_inode);
++ err = test_add(sb, add, remount);
++ if (unlikely(err < 0))
++ goto out;
++ if (err) {
++ err = 0;
++ goto out; /* success */
++ }
++
++ bend = au_sbend(sb);
++ add_branch = au_br_alloc(sb, bend + 2, add->perm);
++ err = PTR_ERR(add_branch);
++ if (IS_ERR(add_branch))
++ goto out;
++
++ err = au_br_init(add_branch, sb, add);
++ if (unlikely(err)) {
++ au_br_do_free(add_branch);
++ goto out;
++ }
++
++ add_bindex = add->bindex;
++ h_dentry = add->path.dentry;
++ if (!remount)
++ au_br_do_add(sb, h_dentry, add_branch, add_bindex);
++ else {
++ sysaufs_brs_del(sb, add_bindex);
++ au_br_do_add(sb, h_dentry, add_branch, add_bindex);
++ sysaufs_brs_add(sb, add_bindex);
++ }
++
++ if (!add_bindex)
++ au_cpup_attr_all(root_inode, /*force*/1);
++ else
++ au_add_nlink(root_inode, h_dentry->d_inode);
++ maxb = h_dentry->d_sb->s_maxbytes;
++ if (sb->s_maxbytes < maxb)
++ sb->s_maxbytes = maxb;
++
++ /*
++ * this test/set prevents aufs from handling unnecesary inotify events
++ * of xino files, in a case of re-adding a writable branch which was
++ * once detached from aufs.
++ */
++ if (au_xino_brid(sb) < 0
++ && au_br_writable(add_branch->br_perm)
++ && !au_test_fs_bad_xino(h_dentry->d_sb)
++ && add_branch->br_xino.xi_file
++ && add_branch->br_xino.xi_file->f_dentry->d_parent == h_dentry)
++ au_xino_brid_set(sb, add_branch->br_id);
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * delete a branch
++ */
++
++/* to show the line number, do not make it inlined function */
++#define AuVerbose(do_info, fmt, args...) do { \
++ if (do_info) \
++ AuInfo(fmt, ##args); \
++} while (0)
++
++/*
++ * test if the branch is deletable or not.
++ */
++static int test_dentry_busy(struct dentry *root, aufs_bindex_t bindex,
++ unsigned int sigen)
++{
++ int err, i, j, ndentry;
++ aufs_bindex_t bstart, bend;
++ unsigned char verbose;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++ struct dentry *d;
++ struct inode *inode;
++
++ err = au_dpages_init(&dpages, GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++ err = au_dcsub_pages(&dpages, root, NULL, NULL);
++ if (unlikely(err))
++ goto out_dpages;
++
++ verbose = !!au_opt_test(au_mntflags(root->d_sb), VERBOSE);
++ for (i = 0; !err && i < dpages.ndpage; i++) {
++ dpage = dpages.dpages + i;
++ ndentry = dpage->ndentry;
++ for (j = 0; !err && j < ndentry; j++) {
++ d = dpage->dentries[j];
++ AuDebugOn(!atomic_read(&d->d_count));
++ inode = d->d_inode;
++ if (au_digen(d) == sigen && au_iigen(inode) == sigen)
++ di_read_lock_child(d, AuLock_IR);
++ else {
++ di_write_lock_child(d);
++ err = au_reval_dpath(d, sigen);
++ if (!err)
++ di_downgrade_lock(d, AuLock_IR);
++ else {
++ di_write_unlock(d);
++ break;
++ }
++ }
++
++ bstart = au_dbstart(d);
++ bend = au_dbend(d);
++ if (bstart <= bindex
++ && bindex <= bend
++ && au_h_dptr(d, bindex)
++ && (!S_ISDIR(inode->i_mode) || bstart == bend)) {
++ err = -EBUSY;
++ AuVerbose(verbose, "busy %.*s\n", AuDLNPair(d));
++ }
++ di_read_unlock(d, AuLock_IR);
++ }
++ }
++
++ out_dpages:
++ au_dpages_free(&dpages);
++ out:
++ return err;
++}
++
++static int test_inode_busy(struct super_block *sb, aufs_bindex_t bindex,
++ unsigned int sigen)
++{
++ int err;
++ struct inode *i;
++ aufs_bindex_t bstart, bend;
++ unsigned char verbose;
++
++ err = 0;
++ verbose = !!au_opt_test(au_mntflags(sb), VERBOSE);
++ list_for_each_entry(i, &sb->s_inodes, i_sb_list) {
++ AuDebugOn(!atomic_read(&i->i_count));
++ if (!list_empty(&i->i_dentry))
++ continue;
++
++ if (au_iigen(i) == sigen)
++ ii_read_lock_child(i);
++ else {
++ ii_write_lock_child(i);
++ err = au_refresh_hinode_self(i, /*do_attr*/1);
++ if (!err)
++ ii_downgrade_lock(i);
++ else {
++ ii_write_unlock(i);
++ break;
++ }
++ }
++
++ bstart = au_ibstart(i);
++ bend = au_ibend(i);
++ if (bstart <= bindex
++ && bindex <= bend
++ && au_h_iptr(i, bindex)
++ && (!S_ISDIR(i->i_mode) || bstart == bend)) {
++ err = -EBUSY;
++ AuVerbose(verbose, "busy i%lu\n", i->i_ino);
++ ii_read_unlock(i);
++ break;
++ }
++ ii_read_unlock(i);
++ }
++
++ return err;
++}
++
++static int test_children_busy(struct dentry *root, aufs_bindex_t bindex)
++{
++ int err;
++ unsigned int sigen;
++
++ sigen = au_sigen(root->d_sb);
++ DiMustNoWaiters(root);
++ IiMustNoWaiters(root->d_inode);
++ di_write_unlock(root);
++ err = test_dentry_busy(root, bindex, sigen);
++ if (!err)
++ err = test_inode_busy(root->d_sb, bindex, sigen);
++ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */
++
++ return err;
++}
++
++static void au_br_do_del_brp(struct au_sbinfo *sbinfo,
++ const aufs_bindex_t bindex,
++ const aufs_bindex_t bend)
++{
++ struct au_branch **brp, **p;
++
++ AuRwMustWriteLock(&sbinfo->si_rwsem);
++
++ brp = sbinfo->si_branch + bindex;
++ if (bindex < bend)
++ memmove(brp, brp + 1, sizeof(*brp) * (bend - bindex));
++ sbinfo->si_branch[0 + bend] = NULL;
++ sbinfo->si_bend--;
++
++ p = krealloc(sbinfo->si_branch, sizeof(*p) * bend, GFP_NOFS);
++ if (p)
++ sbinfo->si_branch = p;
++}
++
++static void au_br_do_del_hdp(struct au_dinfo *dinfo, const aufs_bindex_t bindex,
++ const aufs_bindex_t bend)
++{
++ struct au_hdentry *hdp, *p;
++
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ hdp = dinfo->di_hdentry + bindex;
++ if (bindex < bend)
++ memmove(hdp, hdp + 1, sizeof(*hdp) * (bend - bindex));
++ dinfo->di_hdentry[0 + bend].hd_dentry = NULL;
++ dinfo->di_bend--;
++
++ p = krealloc(dinfo->di_hdentry, sizeof(*p) * bend, GFP_NOFS);
++ if (p)
++ dinfo->di_hdentry = p;
++}
++
++static void au_br_do_del_hip(struct au_iinfo *iinfo, const aufs_bindex_t bindex,
++ const aufs_bindex_t bend)
++{
++ struct au_hinode *hip, *p;
++
++ AuRwMustWriteLock(&iinfo->ii_rwsem);
++
++ hip = iinfo->ii_hinode + bindex;
++ if (bindex < bend)
++ memmove(hip, hip + 1, sizeof(*hip) * (bend - bindex));
++ iinfo->ii_hinode[0 + bend].hi_inode = NULL;
++ au_hin_init(iinfo->ii_hinode + bend, NULL);
++ iinfo->ii_bend--;
++
++ p = krealloc(iinfo->ii_hinode, sizeof(*p) * bend, GFP_NOFS);
++ if (p)
++ iinfo->ii_hinode = p;
++}
++
++static void au_br_do_del(struct super_block *sb, aufs_bindex_t bindex,
++ struct au_branch *br)
++{
++ aufs_bindex_t bend;
++ struct au_sbinfo *sbinfo;
++ struct dentry *root;
++ struct inode *inode;
++
++ SiMustWriteLock(sb);
++
++ root = sb->s_root;
++ inode = root->d_inode;
++ au_plink_block_maintain(sb);
++ sbinfo = au_sbi(sb);
++ bend = sbinfo->si_bend;
++
++ dput(au_h_dptr(root, bindex));
++ au_hiput(au_hi(inode, bindex));
++ au_br_do_free(br);
++
++ au_br_do_del_brp(sbinfo, bindex, bend);
++ au_br_do_del_hdp(au_di(root), bindex, bend);
++ au_br_do_del_hip(au_ii(inode), bindex, bend);
++}
++
++int au_br_del(struct super_block *sb, struct au_opt_del *del, int remount)
++{
++ int err, rerr, i;
++ unsigned int mnt_flags;
++ aufs_bindex_t bindex, bend, br_id;
++ unsigned char do_wh, verbose;
++ struct au_branch *br;
++ struct au_wbr *wbr;
++
++ err = 0;
++ bindex = au_find_dbindex(sb->s_root, del->h_path.dentry);
++ if (bindex < 0) {
++ if (remount)
++ goto out; /* success */
++ err = -ENOENT;
++ AuErr("%s no such branch\n", del->pathname);
++ goto out;
++ }
++ AuDbg("bindex b%d\n", bindex);
++
++ err = -EBUSY;
++ mnt_flags = au_mntflags(sb);
++ verbose = !!au_opt_test(mnt_flags, VERBOSE);
++ bend = au_sbend(sb);
++ if (unlikely(!bend)) {
++ AuVerbose(verbose, "no more branches left\n");
++ goto out;
++ }
++ br = au_sbr(sb, bindex);
++ i = atomic_read(&br->br_count);
++ if (unlikely(i)) {
++ AuVerbose(verbose, "%d file(s) opened\n", i);
++ goto out;
++ }
++
++ wbr = br->br_wbr;
++ do_wh = wbr && (wbr->wbr_whbase || wbr->wbr_plink || wbr->wbr_orph);
++ if (do_wh) {
++ /* instead of WbrWhMustWriteLock(wbr) */
++ SiMustWriteLock(sb);
++ for (i = 0; i < AuBrWh_Last; i++) {
++ dput(wbr->wbr_wh[i]);
++ wbr->wbr_wh[i] = NULL;
++ }
++ }
++
++ err = test_children_busy(sb->s_root, bindex);
++ if (unlikely(err)) {
++ if (do_wh)
++ goto out_wh;
++ goto out;
++ }
++
++ err = 0;
++ br_id = br->br_id;
++ if (!remount)
++ au_br_do_del(sb, bindex, br);
++ else {
++ sysaufs_brs_del(sb, bindex);
++ au_br_do_del(sb, bindex, br);
++ sysaufs_brs_add(sb, bindex);
++ }
++
++ if (!bindex)
++ au_cpup_attr_all(sb->s_root->d_inode, /*force*/1);
++ else
++ au_sub_nlink(sb->s_root->d_inode, del->h_path.dentry->d_inode);
++ if (au_opt_test(mnt_flags, PLINK))
++ au_plink_half_refresh(sb, br_id);
++
++ if (sb->s_maxbytes == del->h_path.dentry->d_sb->s_maxbytes) {
++ bend--;
++ sb->s_maxbytes = 0;
++ for (bindex = 0; bindex <= bend; bindex++) {
++ unsigned long long maxb;
++
++ maxb = au_sbr_sb(sb, bindex)->s_maxbytes;
++ if (sb->s_maxbytes < maxb)
++ sb->s_maxbytes = maxb;
++ }
++ }
++
++ if (au_xino_brid(sb) == br->br_id)
++ au_xino_brid_set(sb, -1);
++ goto out; /* success */
++
++ out_wh:
++ /* revert */
++ rerr = au_br_init_wh(sb, br, br->br_perm, del->h_path.dentry);
++ if (rerr)
++ AuWarn("failed re-creating base whiteout, %s. (%d)\n",
++ del->pathname, rerr);
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * change a branch permission
++ */
++
++static int do_need_sigen_inc(int a, int b)
++{
++ return au_br_whable(a) && !au_br_whable(b);
++}
++
++static int need_sigen_inc(int old, int new)
++{
++ return do_need_sigen_inc(old, new)
++ || do_need_sigen_inc(new, old);
++}
++
++static int au_br_mod_files_ro(struct super_block *sb, aufs_bindex_t bindex)
++{
++ int err;
++ unsigned long n, ul, bytes, files;
++ aufs_bindex_t bstart;
++ struct file *file, *hf, **a;
++ const int step_bytes = 1024, /* memory allocation unit */
++ step_files = step_bytes / sizeof(*a);
++
++ err = -ENOMEM;
++ n = 0;
++ bytes = step_bytes;
++ files = step_files;
++ a = kmalloc(bytes, GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ /* no need file_list_lock() since sbinfo is locked? defered? */
++ list_for_each_entry(file, &sb->s_files, f_u.fu_list) {
++ if (special_file(file->f_dentry->d_inode->i_mode))
++ continue;
++
++ AuDbg("%.*s\n", AuDLNPair(file->f_dentry));
++ fi_read_lock(file);
++ if (unlikely(au_test_mmapped(file))) {
++ err = -EBUSY;
++ FiMustNoWaiters(file);
++ fi_read_unlock(file);
++ goto out_free;
++ }
++
++ bstart = au_fbstart(file);
++ if (!S_ISREG(file->f_dentry->d_inode->i_mode)
++ || !(file->f_mode & FMODE_WRITE)
++ || bstart != bindex) {
++ FiMustNoWaiters(file);
++ fi_read_unlock(file);
++ continue;
++ }
++
++ hf = au_h_fptr(file, bstart);
++ FiMustNoWaiters(file);
++ fi_read_unlock(file);
++
++ if (n < files)
++ a[n++] = hf;
++ else {
++ void *p;
++
++ err = -ENOMEM;
++ bytes += step_bytes;
++ files += step_files;
++ p = krealloc(a, bytes, GFP_NOFS);
++ if (p) {
++ a = p;
++ a[n++] = hf;
++ } else
++ goto out_free;
++ }
++ }
++
++ err = 0;
++ for (ul = 0; ul < n; ul++) {
++ /* todo: already flushed? */
++ /* cf. fs/super.c:mark_files_ro() */
++ hf = a[ul];
++ hf->f_mode &= ~FMODE_WRITE;
++ if (!file_check_writeable(hf)) {
++ file_release_write(hf);
++ mnt_drop_write(hf->f_vfsmnt);
++ }
++ }
++
++ out_free:
++ kfree(a);
++ out:
++ return err;
++}
++
++int au_br_mod(struct super_block *sb, struct au_opt_mod *mod, int remount,
++ int *do_update)
++{
++ int err, rerr;
++ aufs_bindex_t bindex;
++ struct dentry *root;
++ struct au_branch *br;
++
++ root = sb->s_root;
++ au_plink_block_maintain(sb);
++ bindex = au_find_dbindex(root, mod->h_root);
++ if (bindex < 0) {
++ if (remount)
++ return 0; /* success */
++ err = -ENOENT;
++ AuErr("%s no such branch\n", mod->path);
++ goto out;
++ }
++ AuDbg("bindex b%d\n", bindex);
++
++ err = test_br(mod->h_root->d_inode, mod->perm, mod->path);
++ if (unlikely(err))
++ goto out;
++
++ br = au_sbr(sb, bindex);
++ if (br->br_perm == mod->perm)
++ return 0; /* success */
++
++ if (au_br_writable(br->br_perm)) {
++ /* remove whiteout base */
++ err = au_br_init_wh(sb, br, mod->perm, mod->h_root);
++ if (unlikely(err))
++ goto out;
++
++ if (!au_br_writable(mod->perm)) {
++ /* rw --> ro, file might be mmapped */
++ DiMustNoWaiters(root);
++ IiMustNoWaiters(root->d_inode);
++ di_write_unlock(root);
++ err = au_br_mod_files_ro(sb, bindex);
++ /* aufs_write_lock() calls ..._child() */
++ di_write_lock_child(root);
++
++ if (unlikely(err)) {
++ rerr = -ENOMEM;
++ br->br_wbr = kmalloc(sizeof(*br->br_wbr),
++ GFP_NOFS);
++ if (br->br_wbr)
++ rerr = au_br_init_wh
++ (sb, br, br->br_perm,
++ mod->h_root);
++ if (unlikely(rerr)) {
++ AuIOErr("nested error %d (%d)\n",
++ rerr, err);
++ br->br_perm = mod->perm;
++ }
++ }
++ }
++ } else if (au_br_writable(mod->perm)) {
++ /* ro --> rw */
++ err = -ENOMEM;
++ br->br_wbr = kmalloc(sizeof(*br->br_wbr), GFP_NOFS);
++ if (br->br_wbr) {
++ struct path path = {
++ .mnt = br->br_mnt,
++ .dentry = mod->h_root
++ };
++
++ err = au_wbr_init(br, sb, mod->perm, &path);
++ if (unlikely(err)) {
++ kfree(br->br_wbr);
++ br->br_wbr = NULL;
++ }
++ }
++ }
++
++ if (!err) {
++ *do_update |= need_sigen_inc(br->br_perm, mod->perm);
++ br->br_perm = mod->perm;
++ }
++
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/branch.h linux-2.6.31.5/fs/aufs/branch.h
+--- linux-2.6.31.5.orig/fs/aufs/branch.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/branch.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,219 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * branch filesystems and xino for them
++ */
++
++#ifndef __AUFS_BRANCH_H__
++#define __AUFS_BRANCH_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/mount.h>
++#include <linux/aufs_type.h>
++#include "rwsem.h"
++#include "super.h"
++
++/* ---------------------------------------------------------------------- */
++
++/* a xino file */
++struct au_xino_file {
++ struct file *xi_file;
++ struct mutex xi_nondir_mtx;
++
++ /* todo: make xino files an array to support huge inode number */
++
++#ifdef CONFIG_DEBUG_FS
++ struct dentry *xi_dbgaufs;
++#endif
++};
++
++/* members for writable branch only */
++enum {AuBrWh_BASE, AuBrWh_PLINK, AuBrWh_ORPH, AuBrWh_Last};
++struct au_wbr {
++ struct au_rwsem wbr_wh_rwsem;
++ struct dentry *wbr_wh[AuBrWh_Last];
++ atomic_t wbr_wh_running;
++#define wbr_whbase wbr_wh[AuBrWh_BASE] /* whiteout base */
++#define wbr_plink wbr_wh[AuBrWh_PLINK] /* pseudo-link dir */
++#define wbr_orph wbr_wh[AuBrWh_ORPH] /* dir for orphans */
++
++ /* mfs mode */
++ unsigned long long wbr_bytes;
++};
++
++/* protected by superblock rwsem */
++struct au_branch {
++ struct au_xino_file br_xino;
++
++ aufs_bindex_t br_id;
++
++ int br_perm;
++ struct vfsmount *br_mnt;
++ atomic_t br_count;
++
++ struct au_wbr *br_wbr;
++
++ /* xino truncation */
++ blkcnt_t br_xino_upper; /* watermark in blocks */
++ atomic_t br_xino_running;
++
++#ifdef CONFIG_SYSFS
++ /* an entry under sysfs per mount-point */
++ char br_name[8];
++ struct attribute br_attr;
++#endif
++};
++
++/* ---------------------------------------------------------------------- */
++
++/* branch permission and attribute */
++enum {
++ AuBrPerm_RW, /* writable, linkable wh */
++ AuBrPerm_RO, /* readonly, no wh */
++ AuBrPerm_RR, /* natively readonly, no wh */
++
++ AuBrPerm_RWNoLinkWH, /* un-linkable whiteouts */
++
++ AuBrPerm_ROWH, /* whiteout-able */
++ AuBrPerm_RRWH, /* whiteout-able */
++
++ AuBrPerm_Last
++};
++
++static inline int au_br_writable(int brperm)
++{
++ return brperm == AuBrPerm_RW || brperm == AuBrPerm_RWNoLinkWH;
++}
++
++static inline int au_br_whable(int brperm)
++{
++ return brperm == AuBrPerm_RW
++ || brperm == AuBrPerm_ROWH
++ || brperm == AuBrPerm_RRWH;
++}
++
++static inline int au_br_rdonly(struct au_branch *br)
++{
++ return ((br->br_mnt->mnt_sb->s_flags & MS_RDONLY)
++ || !au_br_writable(br->br_perm))
++ ? -EROFS : 0;
++}
++
++static inline int au_br_hinotifyable(int brperm __maybe_unused)
++{
++#ifdef CONFIG_AUFS_HINOTIFY
++ return brperm != AuBrPerm_RR && brperm != AuBrPerm_RRWH;
++#else
++ return 0;
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* branch.c */
++struct au_sbinfo;
++void au_br_free(struct au_sbinfo *sinfo);
++int au_br_index(struct super_block *sb, aufs_bindex_t br_id);
++struct au_opt_add;
++int au_br_add(struct super_block *sb, struct au_opt_add *add, int remount);
++struct au_opt_del;
++int au_br_del(struct super_block *sb, struct au_opt_del *del, int remount);
++struct au_opt_mod;
++int au_br_mod(struct super_block *sb, struct au_opt_mod *mod, int remount,
++ int *do_update);
++
++/* xino.c */
++static const loff_t au_loff_max = LLONG_MAX;
++
++int au_xib_trunc(struct super_block *sb);
++ssize_t xino_fread(au_readf_t func, struct file *file, void *buf, size_t size,
++ loff_t *pos);
++ssize_t xino_fwrite(au_writef_t func, struct file *file, void *buf, size_t size,
++ loff_t *pos);
++struct file *au_xino_create2(struct file *base_file, struct file *copy_src);
++struct file *au_xino_create(struct super_block *sb, char *fname, int silent);
++ino_t au_xino_new_ino(struct super_block *sb);
++int au_xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t ino);
++int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t ino);
++int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t *ino);
++int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t hino,
++ struct file *base_file, int do_test);
++int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex);
++
++struct au_opt_xino;
++int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount);
++void au_xino_clr(struct super_block *sb);
++struct file *au_xino_def(struct super_block *sb);
++int au_xino_path(struct seq_file *seq, struct file *file);
++
++/* ---------------------------------------------------------------------- */
++
++/* Superblock to branch */
++static inline
++aufs_bindex_t au_sbr_id(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_sbr(sb, bindex)->br_id;
++}
++
++static inline
++struct vfsmount *au_sbr_mnt(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_sbr(sb, bindex)->br_mnt;
++}
++
++static inline
++struct super_block *au_sbr_sb(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_sbr_mnt(sb, bindex)->mnt_sb;
++}
++
++static inline void au_sbr_put(struct super_block *sb, aufs_bindex_t bindex)
++{
++ atomic_dec_return(&au_sbr(sb, bindex)->br_count);
++}
++
++static inline int au_sbr_perm(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_sbr(sb, bindex)->br_perm;
++}
++
++static inline int au_sbr_whable(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_br_whable(au_sbr_perm(sb, bindex));
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * wbr_wh_read_lock, wbr_wh_write_lock
++ * wbr_wh_read_unlock, wbr_wh_write_unlock, wbr_wh_downgrade_lock
++ */
++AuSimpleRwsemFuncs(wbr_wh, struct au_wbr *wbr, &wbr->wbr_wh_rwsem);
++
++#define WbrWhMustNoWaiters(wbr) AuRwMustNoWaiters(&wbr->wbr_wh_rwsem)
++#define WbrWhMustAnyLock(wbr) AuRwMustAnyLock(&wbr->wbr_wh_rwsem)
++#define WbrWhMustWriteLock(wbr) AuRwMustWriteLock(&wbr->wbr_wh_rwsem)
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_BRANCH_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/cpup.c linux-2.6.31.5/fs/aufs/cpup.c
+--- linux-2.6.31.5.orig/fs/aufs/cpup.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/cpup.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,1048 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * copy-up functions, see wbr_policy.c for copy-down
++ */
++
++#include <linux/file.h>
++#include <linux/fs_stack.h>
++#include <linux/mm.h>
++#include <linux/uaccess.h>
++#include "aufs.h"
++
++void au_cpup_attr_flags(struct inode *dst, struct inode *src)
++{
++ const unsigned int mask = S_DEAD | S_SWAPFILE | S_PRIVATE
++ | S_NOATIME | S_NOCMTIME;
++
++ dst->i_flags |= src->i_flags & ~mask;
++ if (au_test_fs_notime(dst->i_sb))
++ dst->i_flags |= S_NOATIME | S_NOCMTIME;
++}
++
++void au_cpup_attr_timesizes(struct inode *inode)
++{
++ struct inode *h_inode;
++
++ h_inode = au_h_iptr(inode, au_ibstart(inode));
++ fsstack_copy_attr_times(inode, h_inode);
++ vfsub_copy_inode_size(inode, h_inode);
++}
++
++void au_cpup_attr_nlink(struct inode *inode, int force)
++{
++ struct inode *h_inode;
++ struct super_block *sb;
++ aufs_bindex_t bindex, bend;
++
++ sb = inode->i_sb;
++ bindex = au_ibstart(inode);
++ h_inode = au_h_iptr(inode, bindex);
++ if (!force
++ && !S_ISDIR(h_inode->i_mode)
++ && au_opt_test(au_mntflags(sb), PLINK)
++ && au_plink_test(inode))
++ return;
++
++ inode->i_nlink = h_inode->i_nlink;
++
++ /*
++ * fewer nlink makes find(1) noisy, but larger nlink doesn't.
++ * it may includes whplink directory.
++ */
++ if (S_ISDIR(h_inode->i_mode)) {
++ bend = au_ibend(inode);
++ for (bindex++; bindex <= bend; bindex++) {
++ h_inode = au_h_iptr(inode, bindex);
++ if (h_inode)
++ au_add_nlink(inode, h_inode);
++ }
++ }
++}
++
++void au_cpup_attr_changeable(struct inode *inode)
++{
++ struct inode *h_inode;
++
++ h_inode = au_h_iptr(inode, au_ibstart(inode));
++ inode->i_mode = h_inode->i_mode;
++ inode->i_uid = h_inode->i_uid;
++ inode->i_gid = h_inode->i_gid;
++ au_cpup_attr_timesizes(inode);
++ au_cpup_attr_flags(inode, h_inode);
++}
++
++void au_cpup_igen(struct inode *inode, struct inode *h_inode)
++{
++ struct au_iinfo *iinfo = au_ii(inode);
++
++ IiMustWriteLock(inode);
++
++ iinfo->ii_higen = h_inode->i_generation;
++ iinfo->ii_hsb1 = h_inode->i_sb;
++}
++
++void au_cpup_attr_all(struct inode *inode, int force)
++{
++ struct inode *h_inode;
++
++ h_inode = au_h_iptr(inode, au_ibstart(inode));
++ au_cpup_attr_changeable(inode);
++ if (inode->i_nlink > 0)
++ au_cpup_attr_nlink(inode, force);
++ inode->i_rdev = h_inode->i_rdev;
++ inode->i_blkbits = h_inode->i_blkbits;
++ au_cpup_igen(inode, h_inode);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* Note: dt_dentry and dt_h_dentry are not dget/dput-ed */
++
++/* keep the timestamps of the parent dir when cpup */
++void au_dtime_store(struct au_dtime *dt, struct dentry *dentry,
++ struct path *h_path)
++{
++ struct inode *h_inode;
++
++ dt->dt_dentry = dentry;
++ dt->dt_h_path = *h_path;
++ h_inode = h_path->dentry->d_inode;
++ dt->dt_atime = h_inode->i_atime;
++ dt->dt_mtime = h_inode->i_mtime;
++ /* smp_mb(); */
++}
++
++void au_dtime_revert(struct au_dtime *dt)
++{
++ struct iattr attr;
++ int err;
++
++ attr.ia_atime = dt->dt_atime;
++ attr.ia_mtime = dt->dt_mtime;
++ attr.ia_valid = ATTR_FORCE | ATTR_MTIME | ATTR_MTIME_SET
++ | ATTR_ATIME | ATTR_ATIME_SET;
++
++ err = vfsub_notify_change(&dt->dt_h_path, &attr);
++ if (unlikely(err))
++ AuWarn("restoring timestamps failed(%d). ignored\n", err);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static noinline_for_stack
++int cpup_iattr(struct dentry *dst, aufs_bindex_t bindex, struct dentry *h_src)
++{
++ int err, sbits;
++ struct iattr ia;
++ struct path h_path;
++ struct inode *h_isrc, *h_idst;
++
++ h_path.dentry = au_h_dptr(dst, bindex);
++ h_idst = h_path.dentry->d_inode;
++ h_path.mnt = au_sbr_mnt(dst->d_sb, bindex);
++ h_isrc = h_src->d_inode;
++ ia.ia_valid = ATTR_FORCE | ATTR_UID | ATTR_GID
++ | ATTR_ATIME | ATTR_MTIME
++ | ATTR_ATIME_SET | ATTR_MTIME_SET;
++ ia.ia_uid = h_isrc->i_uid;
++ ia.ia_gid = h_isrc->i_gid;
++ ia.ia_atime = h_isrc->i_atime;
++ ia.ia_mtime = h_isrc->i_mtime;
++ if (h_idst->i_mode != h_isrc->i_mode
++ && !S_ISLNK(h_idst->i_mode)) {
++ ia.ia_valid |= ATTR_MODE;
++ ia.ia_mode = h_isrc->i_mode;
++ }
++ sbits = !!(h_isrc->i_mode & (S_ISUID | S_ISGID));
++ au_cpup_attr_flags(h_idst, h_isrc);
++ err = vfsub_notify_change(&h_path, &ia);
++
++ /* is this nfs only? */
++ if (!err && sbits && au_test_nfs(h_path.dentry->d_sb)) {
++ ia.ia_valid = ATTR_FORCE | ATTR_MODE;
++ ia.ia_mode = h_isrc->i_mode;
++ err = vfsub_notify_change(&h_path, &ia);
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_do_copy_file(struct file *dst, struct file *src, loff_t len,
++ char *buf, unsigned long blksize)
++{
++ int err;
++ size_t sz, rbytes, wbytes;
++ unsigned char all_zero;
++ char *p, *zp;
++ struct mutex *h_mtx;
++ /* reduce stack usage */
++ struct iattr *ia;
++
++ zp = page_address(ZERO_PAGE(0));
++ if (unlikely(!zp))
++ return -ENOMEM; /* possible? */
++
++ err = 0;
++ all_zero = 0;
++ while (len) {
++ AuDbg("len %lld\n", len);
++ sz = blksize;
++ if (len < blksize)
++ sz = len;
++
++ rbytes = 0;
++ /* todo: signal_pending? */
++ while (!rbytes || err == -EAGAIN || err == -EINTR) {
++ rbytes = vfsub_read_k(src, buf, sz, &src->f_pos);
++ err = rbytes;
++ }
++ if (unlikely(err < 0))
++ break;
++
++ all_zero = 0;
++ if (len >= rbytes && rbytes == blksize)
++ all_zero = !memcmp(buf, zp, rbytes);
++ if (!all_zero) {
++ wbytes = rbytes;
++ p = buf;
++ while (wbytes) {
++ size_t b;
++
++ b = vfsub_write_k(dst, p, wbytes, &dst->f_pos);
++ err = b;
++ /* todo: signal_pending? */
++ if (unlikely(err == -EAGAIN || err == -EINTR))
++ continue;
++ if (unlikely(err < 0))
++ break;
++ wbytes -= b;
++ p += b;
++ }
++ } else {
++ loff_t res;
++
++ AuLabel(hole);
++ res = vfsub_llseek(dst, rbytes, SEEK_CUR);
++ err = res;
++ if (unlikely(res < 0))
++ break;
++ }
++ len -= rbytes;
++ err = 0;
++ }
++
++ /* the last block may be a hole */
++ if (!err && all_zero) {
++ AuLabel(last hole);
++
++ err = 1;
++ if (au_test_nfs(dst->f_dentry->d_sb)) {
++ /* nfs requires this step to make last hole */
++ /* is this only nfs? */
++ do {
++ /* todo: signal_pending? */
++ err = vfsub_write_k(dst, "\0", 1, &dst->f_pos);
++ } while (err == -EAGAIN || err == -EINTR);
++ if (err == 1)
++ dst->f_pos--;
++ }
++
++ if (err == 1) {
++ ia = (void *)buf;
++ ia->ia_size = dst->f_pos;
++ ia->ia_valid = ATTR_SIZE | ATTR_FILE;
++ ia->ia_file = dst;
++ h_mtx = &dst->f_dentry->d_inode->i_mutex;
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD2);
++ err = vfsub_notify_change(&dst->f_path, ia);
++ mutex_unlock(h_mtx);
++ }
++ }
++
++ return err;
++}
++
++int au_copy_file(struct file *dst, struct file *src, loff_t len)
++{
++ int err;
++ unsigned long blksize;
++ unsigned char do_kfree;
++ char *buf;
++
++ err = -ENOMEM;
++ blksize = dst->f_dentry->d_sb->s_blocksize;
++ if (!blksize || PAGE_SIZE < blksize)
++ blksize = PAGE_SIZE;
++ AuDbg("blksize %lu\n", blksize);
++ do_kfree = (blksize != PAGE_SIZE && blksize >= sizeof(struct iattr *));
++ if (do_kfree)
++ buf = kmalloc(blksize, GFP_NOFS);
++ else
++ buf = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!buf))
++ goto out;
++
++ if (len > (1 << 22))
++ AuDbg("copying a large file %lld\n", (long long)len);
++
++ src->f_pos = 0;
++ dst->f_pos = 0;
++ err = au_do_copy_file(dst, src, len, buf, blksize);
++ if (do_kfree)
++ kfree(buf);
++ else
++ free_page((unsigned long)buf);
++
++ out:
++ return err;
++}
++
++/*
++ * to support a sparse file which is opened with O_APPEND,
++ * we need to close the file.
++ */
++static int au_cp_regular(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len)
++{
++ int err, i;
++ enum { SRC, DST };
++ struct {
++ aufs_bindex_t bindex;
++ unsigned int flags;
++ struct dentry *dentry;
++ struct file *file;
++ void *label, *label_file;
++ } *f, file[] = {
++ {
++ .bindex = bsrc,
++ .flags = O_RDONLY | O_NOATIME | O_LARGEFILE,
++ .file = NULL,
++ .label = &&out,
++ .label_file = &&out_src
++ },
++ {
++ .bindex = bdst,
++ .flags = O_WRONLY | O_NOATIME | O_LARGEFILE,
++ .file = NULL,
++ .label = &&out_src,
++ .label_file = &&out_dst
++ }
++ };
++ struct super_block *sb;
++
++ /* bsrc branch can be ro/rw. */
++ sb = dentry->d_sb;
++ f = file;
++ for (i = 0; i < 2; i++, f++) {
++ f->dentry = au_h_dptr(dentry, f->bindex);
++ f->file = au_h_open(dentry, f->bindex, f->flags, /*file*/NULL);
++ err = PTR_ERR(f->file);
++ if (IS_ERR(f->file))
++ goto *f->label;
++ err = -EINVAL;
++ if (unlikely(!f->file->f_op))
++ goto *f->label_file;
++ }
++
++ /* try stopping to update while we copyup */
++ IMustLock(file[SRC].dentry->d_inode);
++ err = au_copy_file(file[DST].file, file[SRC].file, len);
++
++ out_dst:
++ fput(file[DST].file);
++ au_sbr_put(sb, file[DST].bindex);
++ out_src:
++ fput(file[SRC].file);
++ au_sbr_put(sb, file[SRC].bindex);
++ out:
++ return err;
++}
++
++static int au_do_cpup_regular(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len,
++ struct inode *h_dir, struct path *h_path)
++{
++ int err, rerr;
++ loff_t l;
++
++ err = 0;
++ l = i_size_read(au_h_iptr(dentry->d_inode, bsrc));
++ if (len == -1 || l < len)
++ len = l;
++ if (len)
++ err = au_cp_regular(dentry, bdst, bsrc, len);
++ if (!err)
++ goto out; /* success */
++
++ rerr = vfsub_unlink(h_dir, h_path, /*force*/0);
++ if (rerr) {
++ AuIOErr("failed unlinking cpup-ed %.*s(%d, %d)\n",
++ AuDLNPair(h_path->dentry), err, rerr);
++ err = -EIO;
++ }
++
++ out:
++ return err;
++}
++
++static int au_do_cpup_symlink(struct path *h_path, struct dentry *h_src,
++ struct inode *h_dir)
++{
++ int err, symlen;
++ mm_segment_t old_fs;
++ char *sym;
++
++ err = -ENOSYS;
++ if (unlikely(!h_src->d_inode->i_op->readlink))
++ goto out;
++
++ err = -ENOMEM;
++ sym = __getname();
++ if (unlikely(!sym))
++ goto out;
++
++ old_fs = get_fs();
++ set_fs(KERNEL_DS);
++ symlen = h_src->d_inode->i_op->readlink(h_src, (char __user *)sym,
++ PATH_MAX);
++ err = symlen;
++ set_fs(old_fs);
++
++ if (symlen > 0) {
++ sym[symlen] = 0;
++ err = vfsub_symlink(h_dir, h_path, sym);
++ }
++ __putname(sym);
++
++ out:
++ return err;
++}
++
++/* return with the lower dst inode is locked */
++static noinline_for_stack
++int cpup_entry(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
++ struct dentry *dst_parent)
++{
++ int err;
++ umode_t mode;
++ unsigned int mnt_flags;
++ unsigned char isdir;
++ const unsigned char do_dt = !!au_ftest_cpup(flags, DTIME);
++ struct au_dtime dt;
++ struct path h_path;
++ struct dentry *h_src, *h_dst, *h_parent;
++ struct inode *h_inode, *h_dir;
++ struct super_block *sb;
++
++ /* bsrc branch can be ro/rw. */
++ h_src = au_h_dptr(dentry, bsrc);
++ h_inode = h_src->d_inode;
++ AuDebugOn(h_inode != au_h_iptr(dentry->d_inode, bsrc));
++
++ /* try stopping to be referenced while we are creating */
++ h_dst = au_h_dptr(dentry, bdst);
++ h_parent = h_dst->d_parent; /* dir inode is locked */
++ h_dir = h_parent->d_inode;
++ IMustLock(h_dir);
++ AuDebugOn(h_parent != h_dst->d_parent);
++
++ sb = dentry->d_sb;
++ h_path.mnt = au_sbr_mnt(sb, bdst);
++ if (do_dt) {
++ h_path.dentry = h_parent;
++ au_dtime_store(&dt, dst_parent, &h_path);
++ }
++ h_path.dentry = h_dst;
++
++ isdir = 0;
++ mode = h_inode->i_mode;
++ switch (mode & S_IFMT) {
++ case S_IFREG:
++ /* try stopping to update while we are referencing */
++ IMustLock(h_inode);
++ err = vfsub_create(h_dir, &h_path, mode | S_IWUSR);
++ if (!err)
++ err = au_do_cpup_regular
++ (dentry, bdst, bsrc, len,
++ au_h_iptr(dst_parent->d_inode, bdst), &h_path);
++ break;
++ case S_IFDIR:
++ isdir = 1;
++ err = vfsub_mkdir(h_dir, &h_path, mode);
++ if (!err) {
++ /*
++ * strange behaviour from the users view,
++ * particularry setattr case
++ */
++ if (au_ibstart(dst_parent->d_inode) == bdst)
++ au_cpup_attr_nlink(dst_parent->d_inode,
++ /*force*/1);
++ au_cpup_attr_nlink(dentry->d_inode, /*force*/1);
++ }
++ break;
++ case S_IFLNK:
++ err = au_do_cpup_symlink(&h_path, h_src, h_dir);
++ break;
++ case S_IFCHR:
++ case S_IFBLK:
++ AuDebugOn(!capable(CAP_MKNOD));
++ /*FALLTHROUGH*/
++ case S_IFIFO:
++ case S_IFSOCK:
++ err = vfsub_mknod(h_dir, &h_path, mode, h_inode->i_rdev);
++ break;
++ default:
++ AuIOErr("Unknown inode type 0%o\n", mode);
++ err = -EIO;
++ }
++
++ mnt_flags = au_mntflags(sb);
++ if (!au_opt_test(mnt_flags, UDBA_NONE)
++ && !isdir
++ && au_opt_test(mnt_flags, XINO)
++ && h_inode->i_nlink == 1
++ /* todo: unnecessary? */
++ /* && dentry->d_inode->i_nlink == 1 */
++ && bdst < bsrc
++ && !au_ftest_cpup(flags, KEEPLINO))
++ au_xino_write(sb, bsrc, h_inode->i_ino, /*ino*/0);
++ /* ignore this error */
++
++ if (do_dt)
++ au_dtime_revert(&dt);
++ return err;
++}
++
++/*
++ * copyup the @dentry from @bsrc to @bdst.
++ * the caller must set the both of lower dentries.
++ * @len is for truncating when it is -1 copyup the entire file.
++ * in link/rename cases, @dst_parent may be different from the real one.
++ */
++static int au_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
++ struct dentry *dst_parent)
++{
++ int err, rerr;
++ aufs_bindex_t old_ibstart;
++ unsigned char isdir, plink;
++ struct au_dtime dt;
++ struct path h_path;
++ struct dentry *h_src, *h_dst, *h_parent;
++ struct inode *dst_inode, *h_dir, *inode;
++ struct super_block *sb;
++
++ AuDebugOn(bsrc <= bdst);
++
++ sb = dentry->d_sb;
++ h_path.mnt = au_sbr_mnt(sb, bdst);
++ h_dst = au_h_dptr(dentry, bdst);
++ h_parent = h_dst->d_parent; /* dir inode is locked */
++ h_dir = h_parent->d_inode;
++ IMustLock(h_dir);
++
++ h_src = au_h_dptr(dentry, bsrc);
++ inode = dentry->d_inode;
++
++ if (!dst_parent)
++ dst_parent = dget_parent(dentry);
++ else
++ dget(dst_parent);
++
++ plink = !!au_opt_test(au_mntflags(sb), PLINK);
++ dst_inode = au_h_iptr(inode, bdst);
++ if (dst_inode) {
++ if (unlikely(!plink)) {
++ err = -EIO;
++ AuIOErr("i%lu exists on a upper branch "
++ "but plink is disabled\n", inode->i_ino);
++ goto out;
++ }
++
++ if (dst_inode->i_nlink) {
++ const int do_dt = au_ftest_cpup(flags, DTIME);
++
++ h_src = au_plink_lkup(inode, bdst);
++ err = PTR_ERR(h_src);
++ if (IS_ERR(h_src))
++ goto out;
++ if (unlikely(!h_src->d_inode)) {
++ err = -EIO;
++ AuIOErr("i%lu exists on a upper branch "
++ "but plink is broken\n", inode->i_ino);
++ dput(h_src);
++ goto out;
++ }
++
++ if (do_dt) {
++ h_path.dentry = h_parent;
++ au_dtime_store(&dt, dst_parent, &h_path);
++ }
++ h_path.dentry = h_dst;
++ err = vfsub_link(h_src, h_dir, &h_path);
++ if (do_dt)
++ au_dtime_revert(&dt);
++ dput(h_src);
++ goto out;
++ } else
++ /* todo: cpup_wh_file? */
++ /* udba work */
++ au_update_brange(inode, 1);
++ }
++
++ old_ibstart = au_ibstart(inode);
++ err = cpup_entry(dentry, bdst, bsrc, len, flags, dst_parent);
++ if (unlikely(err))
++ goto out;
++ dst_inode = h_dst->d_inode;
++ mutex_lock_nested(&dst_inode->i_mutex, AuLsc_I_CHILD2);
++
++ err = cpup_iattr(dentry, bdst, h_src);
++ isdir = S_ISDIR(dst_inode->i_mode);
++ if (!err) {
++ if (bdst < old_ibstart)
++ au_set_ibstart(inode, bdst);
++ au_set_h_iptr(inode, bdst, au_igrab(dst_inode),
++ au_hi_flags(inode, isdir));
++ mutex_unlock(&dst_inode->i_mutex);
++ if (!isdir
++ && h_src->d_inode->i_nlink > 1
++ && plink)
++ au_plink_append(inode, bdst, h_dst);
++ goto out; /* success */
++ }
++
++ /* revert */
++ h_path.dentry = h_parent;
++ mutex_unlock(&dst_inode->i_mutex);
++ au_dtime_store(&dt, dst_parent, &h_path);
++ h_path.dentry = h_dst;
++ if (!isdir)
++ rerr = vfsub_unlink(h_dir, &h_path, /*force*/0);
++ else
++ rerr = vfsub_rmdir(h_dir, &h_path);
++ au_dtime_revert(&dt);
++ if (rerr) {
++ AuIOErr("failed removing broken entry(%d, %d)\n", err, rerr);
++ err = -EIO;
++ }
++
++ out:
++ dput(dst_parent);
++ return err;
++}
++
++struct au_cpup_single_args {
++ int *errp;
++ struct dentry *dentry;
++ aufs_bindex_t bdst, bsrc;
++ loff_t len;
++ unsigned int flags;
++ struct dentry *dst_parent;
++};
++
++static void au_call_cpup_single(void *args)
++{
++ struct au_cpup_single_args *a = args;
++ *a->errp = au_cpup_single(a->dentry, a->bdst, a->bsrc, a->len,
++ a->flags, a->dst_parent);
++}
++
++int au_sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
++ struct dentry *dst_parent)
++{
++ int err, wkq_err;
++ umode_t mode;
++ struct dentry *h_dentry;
++
++ h_dentry = au_h_dptr(dentry, bsrc);
++ mode = h_dentry->d_inode->i_mode & S_IFMT;
++ if ((mode != S_IFCHR && mode != S_IFBLK)
++ || capable(CAP_MKNOD))
++ err = au_cpup_single(dentry, bdst, bsrc, len, flags,
++ dst_parent);
++ else {
++ struct au_cpup_single_args args = {
++ .errp = &err,
++ .dentry = dentry,
++ .bdst = bdst,
++ .bsrc = bsrc,
++ .len = len,
++ .flags = flags,
++ .dst_parent = dst_parent
++ };
++ wkq_err = au_wkq_wait(au_call_cpup_single, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ return err;
++}
++
++/*
++ * copyup the @dentry from the first active lower branch to @bdst,
++ * using au_cpup_single().
++ */
++static int au_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ unsigned int flags)
++{
++ int err;
++ aufs_bindex_t bsrc, bend;
++
++ bend = au_dbend(dentry);
++ for (bsrc = bdst + 1; bsrc <= bend; bsrc++)
++ if (au_h_dptr(dentry, bsrc))
++ break;
++
++ err = au_lkup_neg(dentry, bdst);
++ if (!err) {
++ err = au_cpup_single(dentry, bdst, bsrc, len, flags, NULL);
++ if (!err)
++ return 0; /* success */
++
++ /* revert */
++ au_set_h_dptr(dentry, bdst, NULL);
++ au_set_dbstart(dentry, bsrc);
++ }
++
++ return err;
++}
++
++struct au_cpup_simple_args {
++ int *errp;
++ struct dentry *dentry;
++ aufs_bindex_t bdst;
++ loff_t len;
++ unsigned int flags;
++};
++
++static void au_call_cpup_simple(void *args)
++{
++ struct au_cpup_simple_args *a = args;
++ *a->errp = au_cpup_simple(a->dentry, a->bdst, a->len, a->flags);
++}
++
++int au_sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ unsigned int flags)
++{
++ int err, wkq_err;
++ unsigned char do_sio;
++ struct dentry *parent;
++ struct inode *h_dir;
++
++ parent = dget_parent(dentry);
++ h_dir = au_h_iptr(parent->d_inode, bdst);
++ do_sio = !!au_test_h_perm_sio(h_dir, MAY_EXEC | MAY_WRITE);
++ if (!do_sio) {
++ /*
++ * testing CAP_MKNOD is for generic fs,
++ * but CAP_FSETID is for xfs only, currently.
++ */
++ umode_t mode = dentry->d_inode->i_mode;
++ do_sio = (((mode & (S_IFCHR | S_IFBLK))
++ && !capable(CAP_MKNOD))
++ || ((mode & (S_ISUID | S_ISGID))
++ && !capable(CAP_FSETID)));
++ }
++ if (!do_sio)
++ err = au_cpup_simple(dentry, bdst, len, flags);
++ else {
++ struct au_cpup_simple_args args = {
++ .errp = &err,
++ .dentry = dentry,
++ .bdst = bdst,
++ .len = len,
++ .flags = flags
++ };
++ wkq_err = au_wkq_wait(au_call_cpup_simple, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ dput(parent);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * copyup the deleted file for writing.
++ */
++static int au_do_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst,
++ struct dentry *wh_dentry, struct file *file,
++ loff_t len)
++{
++ int err;
++ aufs_bindex_t bstart;
++ struct au_dinfo *dinfo;
++ struct dentry *h_d_dst, *h_d_start;
++
++ dinfo = au_di(dentry);
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ bstart = dinfo->di_bstart;
++ h_d_dst = dinfo->di_hdentry[0 + bdst].hd_dentry;
++ dinfo->di_bstart = bdst;
++ dinfo->di_hdentry[0 + bdst].hd_dentry = wh_dentry;
++ h_d_start = dinfo->di_hdentry[0 + bstart].hd_dentry;
++ if (file)
++ dinfo->di_hdentry[0 + bstart].hd_dentry
++ = au_h_fptr(file, au_fbstart(file))->f_dentry;
++ err = au_cpup_single(dentry, bdst, bstart, len, !AuCpup_DTIME,
++ /*h_parent*/NULL);
++ if (!err && file) {
++ err = au_reopen_nondir(file);
++ dinfo->di_hdentry[0 + bstart].hd_dentry = h_d_start;
++ }
++ dinfo->di_hdentry[0 + bdst].hd_dentry = h_d_dst;
++ dinfo->di_bstart = bstart;
++
++ return err;
++}
++
++static int au_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ struct file *file)
++{
++ int err;
++ struct au_dtime dt;
++ struct dentry *parent, *h_parent, *wh_dentry;
++ struct au_branch *br;
++ struct path h_path;
++
++ br = au_sbr(dentry->d_sb, bdst);
++ parent = dget_parent(dentry);
++ h_parent = au_h_dptr(parent, bdst);
++ wh_dentry = au_whtmp_lkup(h_parent, br, &dentry->d_name);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out;
++
++ h_path.dentry = h_parent;
++ h_path.mnt = br->br_mnt;
++ au_dtime_store(&dt, parent, &h_path);
++ err = au_do_cpup_wh(dentry, bdst, wh_dentry, file, len);
++ if (unlikely(err))
++ goto out_wh;
++
++ dget(wh_dentry);
++ h_path.dentry = wh_dentry;
++ err = vfsub_unlink(h_parent->d_inode, &h_path, /*force*/0);
++ if (unlikely(err)) {
++ AuIOErr("failed remove copied-up tmp file %.*s(%d)\n",
++ AuDLNPair(wh_dentry), err);
++ err = -EIO;
++ }
++ au_dtime_revert(&dt);
++ au_set_hi_wh(dentry->d_inode, bdst, wh_dentry);
++
++ out_wh:
++ dput(wh_dentry);
++ out:
++ dput(parent);
++ return err;
++}
++
++struct au_cpup_wh_args {
++ int *errp;
++ struct dentry *dentry;
++ aufs_bindex_t bdst;
++ loff_t len;
++ struct file *file;
++};
++
++static void au_call_cpup_wh(void *args)
++{
++ struct au_cpup_wh_args *a = args;
++ *a->errp = au_cpup_wh(a->dentry, a->bdst, a->len, a->file);
++}
++
++int au_sio_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ struct file *file)
++{
++ int err, wkq_err;
++ struct dentry *parent, *h_orph, *h_parent, *h_dentry;
++ struct inode *dir, *h_dir, *h_tmpdir, *h_inode;
++ struct au_wbr *wbr;
++
++ parent = dget_parent(dentry);
++ dir = parent->d_inode;
++ h_orph = NULL;
++ h_parent = NULL;
++ h_dir = au_igrab(au_h_iptr(dir, bdst));
++ h_tmpdir = h_dir;
++ if (!h_dir->i_nlink) {
++ wbr = au_sbr(dentry->d_sb, bdst)->br_wbr;
++ h_orph = wbr->wbr_orph;
++
++ h_parent = dget(au_h_dptr(parent, bdst));
++ au_set_h_dptr(parent, bdst, NULL);
++ au_set_h_dptr(parent, bdst, dget(h_orph));
++ h_tmpdir = h_orph->d_inode;
++ au_set_h_iptr(dir, bdst, NULL, 0);
++ au_set_h_iptr(dir, bdst, au_igrab(h_tmpdir), /*flags*/0);
++
++ /* this temporary unlock is safe */
++ if (file)
++ h_dentry = au_h_fptr(file, au_fbstart(file))->f_dentry;
++ else
++ h_dentry = au_h_dptr(dentry, au_dbstart(dentry));
++ h_inode = h_dentry->d_inode;
++ IMustLock(h_inode);
++ mutex_unlock(&h_inode->i_mutex);
++ mutex_lock_nested(&h_tmpdir->i_mutex, AuLsc_I_PARENT3);
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ }
++
++ if (!au_test_h_perm_sio(h_tmpdir, MAY_EXEC | MAY_WRITE))
++ err = au_cpup_wh(dentry, bdst, len, file);
++ else {
++ struct au_cpup_wh_args args = {
++ .errp = &err,
++ .dentry = dentry,
++ .bdst = bdst,
++ .len = len,
++ .file = file
++ };
++ wkq_err = au_wkq_wait(au_call_cpup_wh, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ if (h_orph) {
++ mutex_unlock(&h_tmpdir->i_mutex);
++ au_set_h_iptr(dir, bdst, NULL, 0);
++ au_set_h_iptr(dir, bdst, au_igrab(h_dir), /*flags*/0);
++ au_set_h_dptr(parent, bdst, NULL);
++ au_set_h_dptr(parent, bdst, h_parent);
++ }
++ iput(h_dir);
++ dput(parent);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * generic routine for both of copy-up and copy-down.
++ */
++/* cf. revalidate function in file.c */
++int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst,
++ int (*cp)(struct dentry *dentry, aufs_bindex_t bdst,
++ struct dentry *h_parent, void *arg),
++ void *arg)
++{
++ int err;
++ struct au_pin pin;
++ struct dentry *d, *parent, *h_parent, *real_parent;
++
++ err = 0;
++ parent = dget_parent(dentry);
++ if (IS_ROOT(parent))
++ goto out;
++
++ au_pin_init(&pin, dentry, bdst, AuLsc_DI_PARENT2, AuLsc_I_PARENT2,
++ au_opt_udba(dentry->d_sb), AuPin_MNT_WRITE);
++
++ /* do not use au_dpage */
++ real_parent = parent;
++ while (1) {
++ dput(parent);
++ parent = dget_parent(dentry);
++ h_parent = au_h_dptr(parent, bdst);
++ if (h_parent)
++ goto out; /* success */
++
++ /* find top dir which is necessary to cpup */
++ do {
++ d = parent;
++ dput(parent);
++ parent = dget_parent(d);
++ di_read_lock_parent3(parent, !AuLock_IR);
++ h_parent = au_h_dptr(parent, bdst);
++ di_read_unlock(parent, !AuLock_IR);
++ } while (!h_parent);
++
++ if (d != real_parent)
++ di_write_lock_child3(d);
++
++ /* somebody else might create while we were sleeping */
++ if (!au_h_dptr(d, bdst) || !au_h_dptr(d, bdst)->d_inode) {
++ if (au_h_dptr(d, bdst))
++ au_update_dbstart(d);
++
++ au_pin_set_dentry(&pin, d);
++ err = au_do_pin(&pin);
++ if (!err) {
++ err = cp(d, bdst, h_parent, arg);
++ au_unpin(&pin);
++ }
++ }
++
++ if (d != real_parent)
++ di_write_unlock(d);
++ if (unlikely(err))
++ break;
++ }
++
++ out:
++ dput(parent);
++ return err;
++}
++
++static int au_cpup_dir(struct dentry *dentry, aufs_bindex_t bdst,
++ struct dentry *h_parent __maybe_unused ,
++ void *arg __maybe_unused)
++{
++ return au_sio_cpup_simple(dentry, bdst, -1, AuCpup_DTIME);
++}
++
++int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst)
++{
++ return au_cp_dirs(dentry, bdst, au_cpup_dir, NULL);
++}
++
++int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst)
++{
++ int err;
++ struct dentry *parent;
++ struct inode *dir;
++
++ parent = dget_parent(dentry);
++ dir = parent->d_inode;
++ err = 0;
++ if (au_h_iptr(dir, bdst))
++ goto out;
++
++ di_read_unlock(parent, AuLock_IR);
++ di_write_lock_parent(parent);
++ /* someone else might change our inode while we were sleeping */
++ if (!au_h_iptr(dir, bdst))
++ err = au_cpup_dirs(dentry, bdst);
++ di_downgrade_lock(parent, AuLock_IR);
++
++ out:
++ dput(parent);
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/cpup.h linux-2.6.31.5/fs/aufs/cpup.h
+--- linux-2.6.31.5.orig/fs/aufs/cpup.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/cpup.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,81 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * copy-up/down functions
++ */
++
++#ifndef __AUFS_CPUP_H__
++#define __AUFS_CPUP_H__
++
++#ifdef __KERNEL__
++
++#include <linux/path.h>
++#include <linux/time.h>
++#include <linux/aufs_type.h>
++
++struct inode;
++struct file;
++
++void au_cpup_attr_flags(struct inode *dst, struct inode *src);
++void au_cpup_attr_timesizes(struct inode *inode);
++void au_cpup_attr_nlink(struct inode *inode, int force);
++void au_cpup_attr_changeable(struct inode *inode);
++void au_cpup_igen(struct inode *inode, struct inode *h_inode);
++void au_cpup_attr_all(struct inode *inode, int force);
++
++/* ---------------------------------------------------------------------- */
++
++/* cpup flags */
++#define AuCpup_DTIME 1 /* do dtime_store/revert */
++#define AuCpup_KEEPLINO (1 << 1) /* do not clear the lower xino,
++ for link(2) */
++#define au_ftest_cpup(flags, name) ((flags) & AuCpup_##name)
++#define au_fset_cpup(flags, name) { (flags) |= AuCpup_##name; }
++#define au_fclr_cpup(flags, name) { (flags) &= ~AuCpup_##name; }
++
++int au_copy_file(struct file *dst, struct file *src, loff_t len);
++int au_sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
++ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
++ struct dentry *dst_parent);
++int au_sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ unsigned int flags);
++int au_sio_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
++ struct file *file);
++
++int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst,
++ int (*cp)(struct dentry *dentry, aufs_bindex_t bdst,
++ struct dentry *h_parent, void *arg),
++ void *arg);
++int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst);
++int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst);
++
++/* ---------------------------------------------------------------------- */
++
++/* keep timestamps when copyup */
++struct au_dtime {
++ struct dentry *dt_dentry;
++ struct path dt_h_path;
++ struct timespec dt_atime, dt_mtime;
++};
++void au_dtime_store(struct au_dtime *dt, struct dentry *dentry,
++ struct path *h_path);
++void au_dtime_revert(struct au_dtime *dt);
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_CPUP_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dbgaufs.c linux-2.6.31.5/fs/aufs/dbgaufs.c
+--- linux-2.6.31.5.orig/fs/aufs/dbgaufs.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dbgaufs.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,331 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * debugfs interface
++ */
++
++#include <linux/debugfs.h>
++#include "aufs.h"
++
++#ifndef CONFIG_SYSFS
++#error DEBUG_FS depends upon SYSFS
++#endif
++
++static struct dentry *dbgaufs;
++static const mode_t dbgaufs_mode = S_IRUSR | S_IRGRP | S_IROTH;
++
++/* 20 is max digits length of ulong 64 */
++struct dbgaufs_arg {
++ int n;
++ char a[20 * 4];
++};
++
++/*
++ * common function for all XINO files
++ */
++static int dbgaufs_xi_release(struct inode *inode __maybe_unused,
++ struct file *file)
++{
++ kfree(file->private_data);
++ return 0;
++}
++
++static int dbgaufs_xi_open(struct file *xf, struct file *file, int do_fcnt)
++{
++ int err;
++ struct kstat st;
++ struct dbgaufs_arg *p;
++
++ err = -ENOMEM;
++ p = kmalloc(sizeof(*p), GFP_NOFS);
++ if (unlikely(!p))
++ goto out;
++
++ err = 0;
++ p->n = 0;
++ file->private_data = p;
++ if (!xf)
++ goto out;
++
++ err = vfs_getattr(xf->f_vfsmnt, xf->f_dentry, &st);
++ if (!err) {
++ if (do_fcnt)
++ p->n = snprintf
++ (p->a, sizeof(p->a), "%ld, %llux%lu %lld\n",
++ (long)file_count(xf), st.blocks, st.blksize,
++ (long long)st.size);
++ else
++ p->n = snprintf(p->a, sizeof(p->a), "%llux%lu %lld\n",
++ st.blocks, st.blksize,
++ (long long)st.size);
++ AuDebugOn(p->n >= sizeof(p->a));
++ } else {
++ p->n = snprintf(p->a, sizeof(p->a), "err %d\n", err);
++ err = 0;
++ }
++
++ out:
++ return err;
++
++}
++
++static ssize_t dbgaufs_xi_read(struct file *file, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ struct dbgaufs_arg *p;
++
++ p = file->private_data;
++ return simple_read_from_buffer(buf, count, ppos, p->a, p->n);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int dbgaufs_xib_open(struct inode *inode, struct file *file)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++ struct super_block *sb;
++
++ sbinfo = inode->i_private;
++ sb = sbinfo->si_sb;
++ si_noflush_read_lock(sb);
++ err = dbgaufs_xi_open(sbinfo->si_xib, file, /*do_fcnt*/0);
++ si_read_unlock(sb);
++ return err;
++}
++
++static const struct file_operations dbgaufs_xib_fop = {
++ .open = dbgaufs_xib_open,
++ .release = dbgaufs_xi_release,
++ .read = dbgaufs_xi_read
++};
++
++/* ---------------------------------------------------------------------- */
++
++#define DbgaufsXi_PREFIX "xi"
++
++static int dbgaufs_xino_open(struct inode *inode, struct file *file)
++{
++ int err;
++ long l;
++ struct au_sbinfo *sbinfo;
++ struct super_block *sb;
++ struct file *xf;
++ struct qstr *name;
++
++ err = -ENOENT;
++ xf = NULL;
++ name = &file->f_dentry->d_name;
++ if (unlikely(name->len < sizeof(DbgaufsXi_PREFIX)
++ || memcmp(name->name, DbgaufsXi_PREFIX,
++ sizeof(DbgaufsXi_PREFIX) - 1)))
++ goto out;
++ err = strict_strtol(name->name + sizeof(DbgaufsXi_PREFIX) - 1, 10, &l);
++ if (unlikely(err))
++ goto out;
++
++ sbinfo = inode->i_private;
++ sb = sbinfo->si_sb;
++ si_noflush_read_lock(sb);
++ if (l <= au_sbend(sb)) {
++ xf = au_sbr(sb, (aufs_bindex_t)l)->br_xino.xi_file;
++ err = dbgaufs_xi_open(xf, file, /*do_fcnt*/1);
++ } else
++ err = -ENOENT;
++ si_read_unlock(sb);
++
++ out:
++ return err;
++}
++
++static const struct file_operations dbgaufs_xino_fop = {
++ .open = dbgaufs_xino_open,
++ .release = dbgaufs_xi_release,
++ .read = dbgaufs_xi_read
++};
++
++void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
++{
++ aufs_bindex_t bend;
++ struct au_branch *br;
++ struct au_xino_file *xi;
++
++ if (!au_sbi(sb)->si_dbgaufs)
++ return;
++
++ bend = au_sbend(sb);
++ for (; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ xi = &br->br_xino;
++ if (xi->xi_dbgaufs) {
++ debugfs_remove(xi->xi_dbgaufs);
++ xi->xi_dbgaufs = NULL;
++ }
++ }
++}
++
++void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
++{
++ struct au_sbinfo *sbinfo;
++ struct dentry *parent;
++ struct au_branch *br;
++ struct au_xino_file *xi;
++ aufs_bindex_t bend;
++ char name[sizeof(DbgaufsXi_PREFIX) + 5]; /* "xi" bindex NULL */
++
++ sbinfo = au_sbi(sb);
++ parent = sbinfo->si_dbgaufs;
++ if (!parent)
++ return;
++
++ bend = au_sbend(sb);
++ for (; bindex <= bend; bindex++) {
++ snprintf(name, sizeof(name), DbgaufsXi_PREFIX "%d", bindex);
++ br = au_sbr(sb, bindex);
++ xi = &br->br_xino;
++ AuDebugOn(xi->xi_dbgaufs);
++ xi->xi_dbgaufs = debugfs_create_file(name, dbgaufs_mode, parent,
++ sbinfo, &dbgaufs_xino_fop);
++ /* ignore an error */
++ if (unlikely(!xi->xi_dbgaufs))
++ AuWarn1("failed %s under debugfs\n", name);
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_EXPORT
++static int dbgaufs_xigen_open(struct inode *inode, struct file *file)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++ struct super_block *sb;
++
++ sbinfo = inode->i_private;
++ sb = sbinfo->si_sb;
++ si_noflush_read_lock(sb);
++ err = dbgaufs_xi_open(sbinfo->si_xigen, file, /*do_fcnt*/0);
++ si_read_unlock(sb);
++ return err;
++}
++
++static const struct file_operations dbgaufs_xigen_fop = {
++ .open = dbgaufs_xigen_open,
++ .release = dbgaufs_xi_release,
++ .read = dbgaufs_xi_read
++};
++
++static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo)
++{
++ int err;
++
++ /*
++ * This function is a dynamic '__init' fucntion actually,
++ * so the tiny check for si_rwsem is unnecessary.
++ */
++ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
++
++ err = -EIO;
++ sbinfo->si_dbgaufs_xigen = debugfs_create_file
++ ("xigen", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
++ &dbgaufs_xigen_fop);
++ if (sbinfo->si_dbgaufs_xigen)
++ err = 0;
++
++ return err;
++}
++#else
++static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo)
++{
++ return 0;
++}
++#endif /* CONFIG_AUFS_EXPORT */
++
++/* ---------------------------------------------------------------------- */
++
++void dbgaufs_si_fin(struct au_sbinfo *sbinfo)
++{
++ /*
++ * This function is a dynamic '__init' fucntion actually,
++ * so the tiny check for si_rwsem is unnecessary.
++ */
++ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
++
++ debugfs_remove_recursive(sbinfo->si_dbgaufs);
++ sbinfo->si_dbgaufs = NULL;
++ kobject_put(&sbinfo->si_kobj);
++}
++
++int dbgaufs_si_init(struct au_sbinfo *sbinfo)
++{
++ int err;
++ char name[SysaufsSiNameLen];
++
++ /*
++ * This function is a dynamic '__init' fucntion actually,
++ * so the tiny check for si_rwsem is unnecessary.
++ */
++ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
++
++ err = -ENOENT;
++ if (!dbgaufs) {
++ AuErr1("/debug/aufs is uninitialized\n");
++ goto out;
++ }
++
++ err = -EIO;
++ sysaufs_name(sbinfo, name);
++ sbinfo->si_dbgaufs = debugfs_create_dir(name, dbgaufs);
++ if (unlikely(!sbinfo->si_dbgaufs))
++ goto out;
++ kobject_get(&sbinfo->si_kobj);
++
++ sbinfo->si_dbgaufs_xib = debugfs_create_file
++ ("xib", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
++ &dbgaufs_xib_fop);
++ if (unlikely(!sbinfo->si_dbgaufs_xib))
++ goto out_dir;
++
++ err = dbgaufs_xigen_init(sbinfo);
++ if (!err)
++ goto out; /* success */
++
++ out_dir:
++ dbgaufs_si_fin(sbinfo);
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++void dbgaufs_fin(void)
++{
++ debugfs_remove(dbgaufs);
++}
++
++int __init dbgaufs_init(void)
++{
++ int err;
++
++ err = -EIO;
++ dbgaufs = debugfs_create_dir(AUFS_NAME, NULL);
++ if (dbgaufs)
++ err = 0;
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dbgaufs.h linux-2.6.31.5/fs/aufs/dbgaufs.h
+--- linux-2.6.31.5.orig/fs/aufs/dbgaufs.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dbgaufs.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,79 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * debugfs interface
++ */
++
++#ifndef __DBGAUFS_H__
++#define __DBGAUFS_H__
++
++#ifdef __KERNEL__
++
++#include <linux/init.h>
++#include <linux/aufs_type.h>
++
++struct super_block;
++struct au_sbinfo;
++
++#ifdef CONFIG_DEBUG_FS
++/* dbgaufs.c */
++void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
++void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex);
++void dbgaufs_si_fin(struct au_sbinfo *sbinfo);
++int dbgaufs_si_init(struct au_sbinfo *sbinfo);
++void dbgaufs_fin(void);
++int __init dbgaufs_init(void);
++
++#else
++
++static inline
++void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
++{
++ /* empty */
++}
++
++static inline
++void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
++{
++ /* empty */
++}
++
++static inline
++void dbgaufs_si_fin(struct au_sbinfo *sbinfo)
++{
++ /* empty */
++}
++
++static inline
++int dbgaufs_si_init(struct au_sbinfo *sbinfo)
++{
++ return 0;
++}
++
++#define dbgaufs_fin() do {} while (0)
++
++static inline
++int __init dbgaufs_init(void)
++{
++ return 0;
++}
++#endif /* CONFIG_DEBUG_FS */
++
++#endif /* __KERNEL__ */
++#endif /* __DBGAUFS_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dcsub.c linux-2.6.31.5/fs/aufs/dcsub.c
+--- linux-2.6.31.5.orig/fs/aufs/dcsub.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dcsub.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,223 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sub-routines for dentry cache
++ */
++
++#include "aufs.h"
++
++static void au_dpage_free(struct au_dpage *dpage)
++{
++ int i;
++ struct dentry **p;
++
++ p = dpage->dentries;
++ for (i = 0; i < dpage->ndentry; i++)
++ dput(*p++);
++ free_page((unsigned long)dpage->dentries);
++}
++
++int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp)
++{
++ int err;
++ void *p;
++
++ err = -ENOMEM;
++ dpages->dpages = kmalloc(sizeof(*dpages->dpages), gfp);
++ if (unlikely(!dpages->dpages))
++ goto out;
++
++ p = (void *)__get_free_page(gfp);
++ if (unlikely(!p))
++ goto out_dpages;
++
++ dpages->dpages[0].ndentry = 0;
++ dpages->dpages[0].dentries = p;
++ dpages->ndpage = 1;
++ return 0; /* success */
++
++ out_dpages:
++ kfree(dpages->dpages);
++ out:
++ return err;
++}
++
++void au_dpages_free(struct au_dcsub_pages *dpages)
++{
++ int i;
++ struct au_dpage *p;
++
++ p = dpages->dpages;
++ for (i = 0; i < dpages->ndpage; i++)
++ au_dpage_free(p++);
++ kfree(dpages->dpages);
++}
++
++static int au_dpages_append(struct au_dcsub_pages *dpages,
++ struct dentry *dentry, gfp_t gfp)
++{
++ int err, sz;
++ struct au_dpage *dpage;
++ void *p;
++
++ dpage = dpages->dpages + dpages->ndpage - 1;
++ sz = PAGE_SIZE / sizeof(dentry);
++ if (unlikely(dpage->ndentry >= sz)) {
++ AuLabel(new dpage);
++ err = -ENOMEM;
++ sz = dpages->ndpage * sizeof(*dpages->dpages);
++ p = au_kzrealloc(dpages->dpages, sz,
++ sz + sizeof(*dpages->dpages), gfp);
++ if (unlikely(!p))
++ goto out;
++
++ dpages->dpages = p;
++ dpage = dpages->dpages + dpages->ndpage;
++ p = (void *)__get_free_page(gfp);
++ if (unlikely(!p))
++ goto out;
++
++ dpage->ndentry = 0;
++ dpage->dentries = p;
++ dpages->ndpage++;
++ }
++
++ dpage->dentries[dpage->ndentry++] = dget(dentry);
++ return 0; /* success */
++
++ out:
++ return err;
++}
++
++int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
++ au_dpages_test test, void *arg)
++{
++ int err;
++ struct dentry *this_parent = root;
++ struct list_head *next;
++ struct super_block *sb = root->d_sb;
++
++ err = 0;
++ spin_lock(&dcache_lock);
++ repeat:
++ next = this_parent->d_subdirs.next;
++ resume:
++ if (this_parent->d_sb == sb
++ && !IS_ROOT(this_parent)
++ && atomic_read(&this_parent->d_count)
++ && this_parent->d_inode
++ && (!test || test(this_parent, arg))) {
++ err = au_dpages_append(dpages, this_parent, GFP_ATOMIC);
++ if (unlikely(err))
++ goto out;
++ }
++
++ while (next != &this_parent->d_subdirs) {
++ struct list_head *tmp = next;
++ struct dentry *dentry = list_entry(tmp, struct dentry,
++ d_u.d_child);
++ next = tmp->next;
++ if (/*d_unhashed(dentry) || */!dentry->d_inode)
++ continue;
++ if (!list_empty(&dentry->d_subdirs)) {
++ this_parent = dentry;
++ goto repeat;
++ }
++ if (dentry->d_sb == sb
++ && atomic_read(&dentry->d_count)
++ && (!test || test(dentry, arg))) {
++ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
++ if (unlikely(err))
++ goto out;
++ }
++ }
++
++ if (this_parent != root) {
++ next = this_parent->d_u.d_child.next;
++ this_parent = this_parent->d_parent; /* dcache_lock is locked */
++ goto resume;
++ }
++ out:
++ spin_unlock(&dcache_lock);
++ return err;
++}
++
++int au_dcsub_pages_rev(struct au_dcsub_pages *dpages, struct dentry *dentry,
++ int do_include, au_dpages_test test, void *arg)
++{
++ int err;
++
++ err = 0;
++ spin_lock(&dcache_lock);
++ if (do_include && (!test || test(dentry, arg))) {
++ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
++ if (unlikely(err))
++ goto out;
++ }
++ while (!IS_ROOT(dentry)) {
++ dentry = dentry->d_parent; /* dcache_lock is locked */
++ if (!test || test(dentry, arg)) {
++ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
++ if (unlikely(err))
++ break;
++ }
++ }
++
++ out:
++ spin_unlock(&dcache_lock);
++
++ return err;
++}
++
++struct dentry *au_test_subdir(struct dentry *d1, struct dentry *d2)
++{
++ struct dentry *trap, **dentries;
++ int err, i, j;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++
++ trap = ERR_PTR(-ENOMEM);
++ err = au_dpages_init(&dpages, GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++ err = au_dcsub_pages_rev(&dpages, d1, /*do_include*/1, NULL, NULL);
++ if (unlikely(err))
++ goto out_dpages;
++
++ trap = d1;
++ for (i = 0; !err && i < dpages.ndpage; i++) {
++ dpage = dpages.dpages + i;
++ dentries = dpage->dentries;
++ for (j = 0; !err && j < dpage->ndentry; j++) {
++ struct dentry *d;
++
++ d = dentries[j];
++ err = (d == d2);
++ if (!err)
++ trap = d;
++ }
++ }
++ if (!err)
++ trap = NULL;
++
++ out_dpages:
++ au_dpages_free(&dpages);
++ out:
++ return trap;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dcsub.h linux-2.6.31.5/fs/aufs/dcsub.h
+--- linux-2.6.31.5.orig/fs/aufs/dcsub.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dcsub.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,54 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sub-routines for dentry cache
++ */
++
++#ifndef __AUFS_DCSUB_H__
++#define __AUFS_DCSUB_H__
++
++#ifdef __KERNEL__
++
++#include <linux/types.h>
++
++struct dentry;
++
++struct au_dpage {
++ int ndentry;
++ struct dentry **dentries;
++};
++
++struct au_dcsub_pages {
++ int ndpage;
++ struct au_dpage *dpages;
++};
++
++/* ---------------------------------------------------------------------- */
++
++int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp);
++void au_dpages_free(struct au_dcsub_pages *dpages);
++typedef int (*au_dpages_test)(struct dentry *dentry, void *arg);
++int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
++ au_dpages_test test, void *arg);
++int au_dcsub_pages_rev(struct au_dcsub_pages *dpages, struct dentry *dentry,
++ int do_include, au_dpages_test test, void *arg);
++struct dentry *au_test_subdir(struct dentry *d1, struct dentry *d2);
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_DCSUB_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/debug.c linux-2.6.31.5/fs/aufs/debug.c
+--- linux-2.6.31.5.orig/fs/aufs/debug.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/debug.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,427 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * debug print functions
++ */
++
++#include <linux/module.h>
++#include <linux/vt_kern.h>
++#include "aufs.h"
++
++int aufs_debug;
++MODULE_PARM_DESC(debug, "debug print");
++module_param_named(debug, aufs_debug, int, S_IRUGO | S_IWUSR | S_IWGRP);
++
++char *au_plevel = KERN_DEBUG;
++#define dpri(fmt, arg...) do { \
++ if (au_debug_test()) \
++ printk("%s" fmt, au_plevel, ##arg); \
++} while (0)
++
++/* ---------------------------------------------------------------------- */
++
++void au_dpri_whlist(struct au_nhash *whlist)
++{
++ unsigned long ul, n;
++ struct hlist_head *head;
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos;
++
++ n = whlist->nh_num;
++ head = whlist->nh_head;
++ for (ul = 0; ul < n; ul++) {
++ hlist_for_each_entry(tpos, pos, head, wh_hash)
++ dpri("b%d, %.*s, %d\n",
++ tpos->wh_bindex,
++ tpos->wh_str.len, tpos->wh_str.name,
++ tpos->wh_str.len);
++ head++;
++ }
++}
++
++void au_dpri_vdir(struct au_vdir *vdir)
++{
++ unsigned long ul;
++ union au_vdir_deblk_p p;
++ unsigned char *o;
++
++ if (!vdir || IS_ERR(vdir)) {
++ dpri("err %ld\n", PTR_ERR(vdir));
++ return;
++ }
++
++ dpri("deblk %u, nblk %lu, deblk %p, last{%lu, %p}, ver %lu\n",
++ vdir->vd_deblk_sz, vdir->vd_nblk, vdir->vd_deblk,
++ vdir->vd_last.ul, vdir->vd_last.p.deblk, vdir->vd_version);
++ for (ul = 0; ul < vdir->vd_nblk; ul++) {
++ p.deblk = vdir->vd_deblk[ul];
++ o = p.deblk;
++ dpri("[%lu]: %p\n", ul, o);
++ }
++}
++
++static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode,
++ struct dentry *wh)
++{
++ char *n = NULL;
++ int l = 0;
++
++ if (!inode || IS_ERR(inode)) {
++ dpri("i%d: err %ld\n", bindex, PTR_ERR(inode));
++ return -1;
++ }
++
++ /* the type of i_blocks depends upon CONFIG_LSF */
++ BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long)
++ && sizeof(inode->i_blocks) != sizeof(u64));
++ if (wh) {
++ n = (void *)wh->d_name.name;
++ l = wh->d_name.len;
++ }
++
++ dpri("i%d: i%lu, %s, cnt %d, nl %u, 0%o, sz %llu, blk %llu,"
++ " ct %lld, np %lu, st 0x%lx, f 0x%x, g %x%s%.*s\n",
++ bindex,
++ inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??",
++ atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode,
++ i_size_read(inode), (unsigned long long)inode->i_blocks,
++ (long long)timespec_to_ns(&inode->i_ctime) & 0x0ffff,
++ inode->i_mapping ? inode->i_mapping->nrpages : 0,
++ inode->i_state, inode->i_flags, inode->i_generation,
++ l ? ", wh " : "", l, n);
++ return 0;
++}
++
++void au_dpri_inode(struct inode *inode)
++{
++ struct au_iinfo *iinfo;
++ aufs_bindex_t bindex;
++ int err;
++
++ err = do_pri_inode(-1, inode, NULL);
++ if (err || !au_test_aufs(inode->i_sb))
++ return;
++
++ iinfo = au_ii(inode);
++ if (!iinfo)
++ return;
++ dpri("i-1: bstart %d, bend %d, gen %d\n",
++ iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode));
++ if (iinfo->ii_bstart < 0)
++ return;
++ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++)
++ do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode,
++ iinfo->ii_hinode[0 + bindex].hi_whdentry);
++}
++
++static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry)
++{
++ struct dentry *wh = NULL;
++
++ if (!dentry || IS_ERR(dentry)) {
++ dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry));
++ return -1;
++ }
++ /* do not call dget_parent() here */
++ dpri("d%d: %.*s?/%.*s, %s, cnt %d, flags 0x%x\n",
++ bindex,
++ AuDLNPair(dentry->d_parent), AuDLNPair(dentry),
++ dentry->d_sb ? au_sbtype(dentry->d_sb) : "??",
++ atomic_read(&dentry->d_count), dentry->d_flags);
++ if (bindex >= 0 && dentry->d_inode && au_test_aufs(dentry->d_sb)) {
++ struct au_iinfo *iinfo = au_ii(dentry->d_inode);
++ if (iinfo)
++ wh = iinfo->ii_hinode[0 + bindex].hi_whdentry;
++ }
++ do_pri_inode(bindex, dentry->d_inode, wh);
++ return 0;
++}
++
++void au_dpri_dentry(struct dentry *dentry)
++{
++ struct au_dinfo *dinfo;
++ aufs_bindex_t bindex;
++ int err;
++
++ err = do_pri_dentry(-1, dentry);
++ if (err || !au_test_aufs(dentry->d_sb))
++ return;
++
++ dinfo = au_di(dentry);
++ if (!dinfo)
++ return;
++ dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n",
++ dinfo->di_bstart, dinfo->di_bend,
++ dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry));
++ if (dinfo->di_bstart < 0)
++ return;
++ for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++)
++ do_pri_dentry(bindex, dinfo->di_hdentry[0 + bindex].hd_dentry);
++}
++
++static int do_pri_file(aufs_bindex_t bindex, struct file *file)
++{
++ char a[32];
++
++ if (!file || IS_ERR(file)) {
++ dpri("f%d: err %ld\n", bindex, PTR_ERR(file));
++ return -1;
++ }
++ a[0] = 0;
++ if (bindex < 0
++ && file->f_dentry
++ && au_test_aufs(file->f_dentry->d_sb)
++ && au_fi(file))
++ snprintf(a, sizeof(a), ", mmapped %d", au_test_mmapped(file));
++ dpri("f%d: mode 0x%x, flags 0%o, cnt %ld, pos %llu%s\n",
++ bindex, file->f_mode, file->f_flags, (long)file_count(file),
++ file->f_pos, a);
++ if (file->f_dentry)
++ do_pri_dentry(bindex, file->f_dentry);
++ return 0;
++}
++
++void au_dpri_file(struct file *file)
++{
++ struct au_finfo *finfo;
++ aufs_bindex_t bindex;
++ int err;
++
++ err = do_pri_file(-1, file);
++ if (err || !file->f_dentry || !au_test_aufs(file->f_dentry->d_sb))
++ return;
++
++ finfo = au_fi(file);
++ if (!finfo)
++ return;
++ if (finfo->fi_bstart < 0)
++ return;
++ for (bindex = finfo->fi_bstart; bindex <= finfo->fi_bend; bindex++) {
++ struct au_hfile *hf;
++
++ hf = finfo->fi_hfile + bindex;
++ do_pri_file(bindex, hf ? hf->hf_file : NULL);
++ }
++}
++
++static int do_pri_br(aufs_bindex_t bindex, struct au_branch *br)
++{
++ struct vfsmount *mnt;
++ struct super_block *sb;
++
++ if (!br || IS_ERR(br))
++ goto out;
++ mnt = br->br_mnt;
++ if (!mnt || IS_ERR(mnt))
++ goto out;
++ sb = mnt->mnt_sb;
++ if (!sb || IS_ERR(sb))
++ goto out;
++
++ dpri("s%d: {perm 0x%x, cnt %d, wbr %p}, "
++ "%s, dev 0x%02x%02x, flags 0x%lx, cnt(BIAS) %d, active %d, "
++ "xino %d\n",
++ bindex, br->br_perm, atomic_read(&br->br_count), br->br_wbr,
++ au_sbtype(sb), MAJOR(sb->s_dev), MINOR(sb->s_dev),
++ sb->s_flags, sb->s_count - S_BIAS,
++ atomic_read(&sb->s_active), !!br->br_xino.xi_file);
++ return 0;
++
++ out:
++ dpri("s%d: err %ld\n", bindex, PTR_ERR(br));
++ return -1;
++}
++
++void au_dpri_sb(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++ aufs_bindex_t bindex;
++ int err;
++ /* to reuduce stack size */
++ struct {
++ struct vfsmount mnt;
++ struct au_branch fake;
++ } *a;
++
++ /* this function can be called from magic sysrq */
++ a = kzalloc(sizeof(*a), GFP_ATOMIC);
++ if (unlikely(!a)) {
++ dpri("no memory\n");
++ return;
++ }
++
++ a->mnt.mnt_sb = sb;
++ a->fake.br_perm = 0;
++ a->fake.br_mnt = &a->mnt;
++ a->fake.br_xino.xi_file = NULL;
++ atomic_set(&a->fake.br_count, 0);
++ smp_mb(); /* atomic_set */
++ err = do_pri_br(-1, &a->fake);
++ kfree(a);
++ dpri("dev 0x%x\n", sb->s_dev);
++ if (err || !au_test_aufs(sb))
++ return;
++
++ sbinfo = au_sbi(sb);
++ if (!sbinfo)
++ return;
++ dpri("nw %d, gen %u, kobj %d\n",
++ atomic_read(&sbinfo->si_nowait.nw_len), sbinfo->si_generation,
++ atomic_read(&sbinfo->si_kobj.kref.refcount));
++ for (bindex = 0; bindex <= sbinfo->si_bend; bindex++)
++ do_pri_br(bindex, sbinfo->si_branch[0 + bindex]);
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_dbg_sleep_jiffy(int jiffy)
++{
++ while (jiffy)
++ jiffy = schedule_timeout_uninterruptible(jiffy);
++}
++
++void au_dbg_iattr(struct iattr *ia)
++{
++#define AuBit(name) if (ia->ia_valid & ATTR_ ## name) \
++ dpri(#name "\n")
++ AuBit(MODE);
++ AuBit(UID);
++ AuBit(GID);
++ AuBit(SIZE);
++ AuBit(ATIME);
++ AuBit(MTIME);
++ AuBit(CTIME);
++ AuBit(ATIME_SET);
++ AuBit(MTIME_SET);
++ AuBit(FORCE);
++ AuBit(ATTR_FLAG);
++ AuBit(KILL_SUID);
++ AuBit(KILL_SGID);
++ AuBit(FILE);
++ AuBit(KILL_PRIV);
++ AuBit(OPEN);
++ AuBit(TIMES_SET);
++#undef AuBit
++ dpri("ia_file %p\n", ia->ia_file);
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen)
++{
++ struct dentry *parent;
++
++ parent = dget_parent(dentry);
++ AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode)
++ || IS_ROOT(dentry)
++ || au_digen(parent) != sigen);
++ dput(parent);
++}
++
++void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen)
++{
++ struct dentry *parent;
++
++ parent = dget_parent(dentry);
++ AuDebugOn(S_ISDIR(dentry->d_inode->i_mode)
++ || au_digen(parent) != sigen);
++ dput(parent);
++}
++
++void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen)
++{
++ int err, i, j;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++ struct dentry **dentries;
++
++ err = au_dpages_init(&dpages, GFP_NOFS);
++ AuDebugOn(err);
++ err = au_dcsub_pages_rev(&dpages, parent, /*do_include*/1, NULL, NULL);
++ AuDebugOn(err);
++ for (i = dpages.ndpage - 1; !err && i >= 0; i--) {
++ dpage = dpages.dpages + i;
++ dentries = dpage->dentries;
++ for (j = dpage->ndentry - 1; !err && j >= 0; j--)
++ AuDebugOn(au_digen(dentries[j]) != sigen);
++ }
++ au_dpages_free(&dpages);
++}
++
++void au_dbg_verify_hf(struct au_finfo *finfo)
++{
++ struct au_hfile *hf;
++ aufs_bindex_t bend, bindex;
++
++ if (finfo->fi_bstart >= 0) {
++ bend = finfo->fi_bend;
++ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++) {
++ hf = finfo->fi_hfile + bindex;
++ AuDebugOn(hf->hf_file || hf->hf_br);
++ }
++ }
++}
++
++void au_dbg_verify_kthread(void)
++{
++ if (au_test_wkq(current)) {
++ au_dbg_blocked();
++ BUG();
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_debug_sbinfo_init(struct au_sbinfo *sbinfo __maybe_unused)
++{
++#ifdef AuForceNoPlink
++ au_opt_clr(sbinfo->si_mntflags, PLINK);
++#endif
++#ifdef AuForceNoXino
++ au_opt_clr(sbinfo->si_mntflags, XINO);
++#endif
++#ifdef AuForceNoRefrof
++ au_opt_clr(sbinfo->si_mntflags, REFROF);
++#endif
++#ifdef AuForceHinotify
++ au_opt_set_udba(sbinfo->si_mntflags, UDBA_HINOTIFY);
++#endif
++}
++
++int __init au_debug_init(void)
++{
++ aufs_bindex_t bindex;
++ struct au_vdir_destr destr;
++
++ bindex = -1;
++ AuDebugOn(bindex >= 0);
++
++ destr.len = -1;
++ AuDebugOn(destr.len < NAME_MAX);
++
++#ifdef CONFIG_4KSTACKS
++ AuWarn("CONFIG_4KSTACKS is defined.\n");
++#endif
++
++#ifdef AuForceNoBrs
++ sysaufs_brs = 0;
++#endif
++
++ return 0;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/debug.h linux-2.6.31.5/fs/aufs/debug.h
+--- linux-2.6.31.5.orig/fs/aufs/debug.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/debug.h 2009-11-15 22:16:14.000000000 +0100
+@@ -0,0 +1,261 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * debug print functions
++ */
++
++#ifndef __AUFS_DEBUG_H__
++#define __AUFS_DEBUG_H__
++
++#ifdef __KERNEL__
++
++#include <asm/system.h>
++#include <linux/bug.h>
++/* #include <linux/err.h> */
++#include <linux/init.h>
++/* #include <linux/kernel.h> */
++#include <linux/delay.h>
++/* #include <linux/kd.h> */
++/* #include <linux/vt_kern.h> */
++#include <linux/sysrq.h>
++#include <linux/aufs_type.h>
++
++#ifdef CONFIG_AUFS_DEBUG
++#define AuDebugOn(a) BUG_ON(a)
++
++/* module parameter */
++extern int aufs_debug;
++static inline void au_debug(int n)
++{
++ aufs_debug = n;
++ smp_mb();
++}
++
++static inline int au_debug_test(void)
++{
++ return aufs_debug;
++}
++#else
++#define AuDebugOn(a) do {} while (0)
++#define au_debug() do {} while (0)
++static inline int au_debug_test(void)
++{
++ return 0;
++}
++#endif /* CONFIG_AUFS_DEBUG */
++
++/* ---------------------------------------------------------------------- */
++
++/* debug print */
++
++#define AuDpri(lvl, fmt, arg...) \
++ printk(lvl AUFS_NAME " %s:%d:%s[%d]: " fmt, \
++ __func__, __LINE__, current->comm, current->pid, ##arg)
++#define AuDbg(fmt, arg...) do { \
++ if (au_debug_test()) \
++ AuDpri(KERN_DEBUG, "DEBUG: " fmt, ##arg); \
++} while (0)
++#define AuLabel(l) AuDbg(#l "\n")
++#define AuInfo(fmt, arg...) AuDpri(KERN_INFO, fmt, ##arg)
++#define AuWarn(fmt, arg...) AuDpri(KERN_WARNING, fmt, ##arg)
++#define AuErr(fmt, arg...) AuDpri(KERN_ERR, fmt, ##arg)
++#define AuIOErr(fmt, arg...) AuErr("I/O Error, " fmt, ##arg)
++#define AuWarn1(fmt, arg...) do { \
++ static unsigned char _c; \
++ if (!_c++) \
++ AuWarn(fmt, ##arg); \
++} while (0)
++
++#define AuErr1(fmt, arg...) do { \
++ static unsigned char _c; \
++ if (!_c++) \
++ AuErr(fmt, ##arg); \
++} while (0)
++
++#define AuIOErr1(fmt, arg...) do { \
++ static unsigned char _c; \
++ if (!_c++) \
++ AuIOErr(fmt, ##arg); \
++} while (0)
++
++#define AuUnsupportMsg "This operation is not supported." \
++ " Please report this application to aufs-users ML."
++#define AuUnsupport(fmt, args...) do { \
++ AuErr(AuUnsupportMsg "\n" fmt, ##args); \
++ dump_stack(); \
++} while (0)
++
++#define AuTraceErr(e) do { \
++ if (unlikely((e) < 0)) \
++ AuDbg("err %d\n", (int)(e)); \
++} while (0)
++
++#define AuTraceErrPtr(p) do { \
++ if (IS_ERR(p)) \
++ AuDbg("err %ld\n", PTR_ERR(p)); \
++} while (0)
++
++/* dirty macros for debug print, use with "%.*s" and caution */
++#define AuLNPair(qstr) (qstr)->len, (qstr)->name
++#define AuDLNPair(d) AuLNPair(&(d)->d_name)
++
++/* ---------------------------------------------------------------------- */
++
++struct au_sbinfo;
++struct au_finfo;
++struct dentry;
++#ifdef CONFIG_AUFS_DEBUG
++extern char *au_plevel;
++struct au_nhash;
++void au_dpri_whlist(struct au_nhash *whlist);
++struct au_vdir;
++void au_dpri_vdir(struct au_vdir *vdir);
++struct inode;
++void au_dpri_inode(struct inode *inode);
++void au_dpri_dentry(struct dentry *dentry);
++struct file;
++void au_dpri_file(struct file *filp);
++struct super_block;
++void au_dpri_sb(struct super_block *sb);
++
++void au_dbg_sleep_jiffy(int jiffy);
++struct iattr;
++void au_dbg_iattr(struct iattr *ia);
++
++void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen);
++void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen);
++void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen);
++void au_dbg_verify_hf(struct au_finfo *finfo);
++void au_dbg_verify_kthread(void);
++
++int __init au_debug_init(void);
++void au_debug_sbinfo_init(struct au_sbinfo *sbinfo);
++#define AuDbgWhlist(w) do { \
++ AuDbg(#w "\n"); \
++ au_dpri_whlist(w); \
++} while (0)
++
++#define AuDbgVdir(v) do { \
++ AuDbg(#v "\n"); \
++ au_dpri_vdir(v); \
++} while (0)
++
++#define AuDbgInode(i) do { \
++ AuDbg(#i "\n"); \
++ au_dpri_inode(i); \
++} while (0)
++
++#define AuDbgDentry(d) do { \
++ AuDbg(#d "\n"); \
++ au_dpri_dentry(d); \
++} while (0)
++
++#define AuDbgFile(f) do { \
++ AuDbg(#f "\n"); \
++ au_dpri_file(f); \
++} while (0)
++
++#define AuDbgSb(sb) do { \
++ AuDbg(#sb "\n"); \
++ au_dpri_sb(sb); \
++} while (0)
++
++#define AuDbgSleep(sec) do { \
++ AuDbg("sleep %d sec\n", sec); \
++ ssleep(sec); \
++} while (0)
++
++#define AuDbgSleepJiffy(jiffy) do { \
++ AuDbg("sleep %d jiffies\n", jiffy); \
++ au_dbg_sleep_jiffy(jiffy); \
++} while (0)
++
++#define AuDbgIAttr(ia) do { \
++ AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \
++ au_dbg_iattr(ia); \
++} while (0)
++#else
++static inline void au_dbg_verify_dir_parent(struct dentry *dentry,
++ unsigned int sigen)
++{
++ /* empty */
++}
++static inline void au_dbg_verify_nondir_parent(struct dentry *dentry,
++ unsigned int sigen)
++{
++ /* empty */
++}
++static inline void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen)
++{
++ /* empty */
++}
++static inline void au_dbg_verify_hf(struct au_finfo *finfo)
++{
++ /* empty */
++}
++static inline void au_dbg_verify_kthread(void)
++{
++ /* empty */
++}
++
++static inline int au_debug_init(void)
++{
++ return 0;
++}
++static inline void au_debug_sbinfo_init(struct au_sbinfo *sbinfo)
++{
++ /* empty */
++}
++#define AuDbgWhlist(w) do {} while (0)
++#define AuDbgVdir(v) do {} while (0)
++#define AuDbgInode(i) do {} while (0)
++#define AuDbgDentry(d) do {} while (0)
++#define AuDbgFile(f) do {} while (0)
++#define AuDbgSb(sb) do {} while (0)
++#define AuDbgSleep(sec) do {} while (0)
++#define AuDbgSleepJiffy(jiffy) do {} while (0)
++#define AuDbgIAttr(ia) do {} while (0)
++#endif /* CONFIG_AUFS_DEBUG */
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_MAGIC_SYSRQ
++int __init au_sysrq_init(void);
++void au_sysrq_fin(void);
++
++#ifdef CONFIG_HW_CONSOLE
++#define au_dbg_blocked() do { \
++ WARN_ON(1); \
++ handle_sysrq('w', vc_cons[fg_console].d->vc_tty); \
++} while (0)
++#else
++#define au_dbg_blocked() do {} while (0)
++#endif
++
++#else
++static inline int au_sysrq_init(void)
++{
++ return 0;
++}
++#define au_sysrq_fin() do {} while (0)
++#define au_dbg_blocked() do {} while (0)
++#endif /* CONFIG_AUFS_MAGIC_SYSRQ */
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_DEBUG_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dentry.c linux-2.6.31.5/fs/aufs/dentry.c
+--- linux-2.6.31.5.orig/fs/aufs/dentry.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dentry.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,880 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * lookup and dentry operations
++ */
++
++#include <linux/namei.h>
++#include "aufs.h"
++
++static void au_h_nd(struct nameidata *h_nd, struct nameidata *nd)
++{
++ if (nd) {
++ *h_nd = *nd;
++
++ /*
++ * gave up supporting LOOKUP_CREATE/OPEN for lower fs,
++ * due to whiteout and branch permission.
++ */
++ h_nd->flags &= ~(/*LOOKUP_PARENT |*/ LOOKUP_OPEN | LOOKUP_CREATE
++ | LOOKUP_FOLLOW);
++ /* unnecessary? */
++ h_nd->intent.open.file = NULL;
++ } else
++ memset(h_nd, 0, sizeof(*h_nd));
++}
++
++struct au_lkup_one_args {
++ struct dentry **errp;
++ struct qstr *name;
++ struct dentry *h_parent;
++ struct au_branch *br;
++ struct nameidata *nd;
++};
++
++struct dentry *au_lkup_one(struct qstr *name, struct dentry *h_parent,
++ struct au_branch *br, struct nameidata *nd)
++{
++ struct dentry *h_dentry;
++ int err;
++ struct nameidata h_nd;
++
++ if (au_test_fs_null_nd(h_parent->d_sb))
++ return vfsub_lookup_one_len(name->name, h_parent, name->len);
++
++ au_h_nd(&h_nd, nd);
++ h_nd.path.dentry = h_parent;
++ h_nd.path.mnt = br->br_mnt;
++
++ err = __lookup_one_len(name->name, &h_nd.last, NULL, name->len);
++ h_dentry = ERR_PTR(err);
++ if (!err) {
++ path_get(&h_nd.path);
++ h_dentry = vfsub_lookup_hash(&h_nd);
++ path_put(&h_nd.path);
++ }
++
++ return h_dentry;
++}
++
++static void au_call_lkup_one(void *args)
++{
++ struct au_lkup_one_args *a = args;
++ *a->errp = au_lkup_one(a->name, a->h_parent, a->br, a->nd);
++}
++
++#define AuLkup_ALLOW_NEG 1
++#define au_ftest_lkup(flags, name) ((flags) & AuLkup_##name)
++#define au_fset_lkup(flags, name) { (flags) |= AuLkup_##name; }
++#define au_fclr_lkup(flags, name) { (flags) &= ~AuLkup_##name; }
++
++struct au_do_lookup_args {
++ unsigned int flags;
++ mode_t type;
++ struct nameidata *nd;
++};
++
++/*
++ * returns positive/negative dentry, NULL or an error.
++ * NULL means whiteout-ed or not-found.
++ */
++static struct dentry*
++au_do_lookup(struct dentry *h_parent, struct dentry *dentry,
++ aufs_bindex_t bindex, struct qstr *wh_name,
++ struct au_do_lookup_args *args)
++{
++ struct dentry *h_dentry;
++ struct inode *h_inode, *inode;
++ struct qstr *name;
++ struct au_branch *br;
++ int wh_found, opq;
++ unsigned char wh_able;
++ const unsigned char allow_neg = !!au_ftest_lkup(args->flags, ALLOW_NEG);
++
++ name = &dentry->d_name;
++ wh_found = 0;
++ br = au_sbr(dentry->d_sb, bindex);
++ wh_able = !!au_br_whable(br->br_perm);
++ if (wh_able)
++ wh_found = au_wh_test(h_parent, wh_name, br, /*try_sio*/0);
++ h_dentry = ERR_PTR(wh_found);
++ if (!wh_found)
++ goto real_lookup;
++ if (unlikely(wh_found < 0))
++ goto out;
++
++ /* We found a whiteout */
++ /* au_set_dbend(dentry, bindex); */
++ au_set_dbwh(dentry, bindex);
++ if (!allow_neg)
++ return NULL; /* success */
++
++ real_lookup:
++ h_dentry = au_lkup_one(name, h_parent, br, args->nd);
++ if (IS_ERR(h_dentry))
++ goto out;
++
++ h_inode = h_dentry->d_inode;
++ if (!h_inode) {
++ if (!allow_neg)
++ goto out_neg;
++ } else if (wh_found
++ || (args->type && args->type != (h_inode->i_mode & S_IFMT)))
++ goto out_neg;
++
++ if (au_dbend(dentry) <= bindex)
++ au_set_dbend(dentry, bindex);
++ if (au_dbstart(dentry) < 0 || bindex < au_dbstart(dentry))
++ au_set_dbstart(dentry, bindex);
++ au_set_h_dptr(dentry, bindex, h_dentry);
++
++ inode = dentry->d_inode;
++ if (!h_inode || !S_ISDIR(h_inode->i_mode) || !wh_able
++ || (inode && !S_ISDIR(inode->i_mode)))
++ goto out; /* success */
++
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ opq = au_diropq_test(h_dentry, br);
++ mutex_unlock(&h_inode->i_mutex);
++ if (opq > 0)
++ au_set_dbdiropq(dentry, bindex);
++ else if (unlikely(opq < 0)) {
++ au_set_h_dptr(dentry, bindex, NULL);
++ h_dentry = ERR_PTR(opq);
++ }
++ goto out;
++
++ out_neg:
++ dput(h_dentry);
++ h_dentry = NULL;
++ out:
++ return h_dentry;
++}
++
++static int au_test_shwh(struct super_block *sb, const struct qstr *name)
++{
++ if (unlikely(!au_opt_test(au_mntflags(sb), SHWH)
++ && !strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)))
++ return -EPERM;
++ return 0;
++}
++
++/*
++ * returns the number of lower positive dentries,
++ * otherwise an error.
++ * can be called at unlinking with @type is zero.
++ */
++int au_lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type,
++ struct nameidata *nd)
++{
++ int npositive, err;
++ aufs_bindex_t bindex, btail, bdiropq;
++ unsigned char isdir;
++ struct qstr whname;
++ struct au_do_lookup_args args = {
++ .flags = 0,
++ .type = type,
++ .nd = nd
++ };
++ const struct qstr *name = &dentry->d_name;
++ struct dentry *parent;
++ struct inode *inode;
++
++ parent = dget_parent(dentry);
++ err = au_test_shwh(dentry->d_sb, name);
++ if (unlikely(err))
++ goto out;
++
++ err = au_wh_name_alloc(&whname, name);
++ if (unlikely(err))
++ goto out;
++
++ inode = dentry->d_inode;
++ isdir = !!(inode && S_ISDIR(inode->i_mode));
++ if (!type)
++ au_fset_lkup(args.flags, ALLOW_NEG);
++
++ npositive = 0;
++ btail = au_dbtaildir(parent);
++ for (bindex = bstart; bindex <= btail; bindex++) {
++ struct dentry *h_parent, *h_dentry;
++ struct inode *h_inode, *h_dir;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (h_dentry) {
++ if (h_dentry->d_inode)
++ npositive++;
++ if (type != S_IFDIR)
++ break;
++ continue;
++ }
++ h_parent = au_h_dptr(parent, bindex);
++ if (!h_parent)
++ continue;
++ h_dir = h_parent->d_inode;
++ if (!h_dir || !S_ISDIR(h_dir->i_mode))
++ continue;
++
++ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
++ h_dentry = au_do_lookup(h_parent, dentry, bindex, &whname,
++ &args);
++ mutex_unlock(&h_dir->i_mutex);
++ err = PTR_ERR(h_dentry);
++ if (IS_ERR(h_dentry))
++ goto out_wh;
++ au_fclr_lkup(args.flags, ALLOW_NEG);
++
++ if (au_dbwh(dentry) >= 0)
++ break;
++ if (!h_dentry)
++ continue;
++ h_inode = h_dentry->d_inode;
++ if (!h_inode)
++ continue;
++ npositive++;
++ if (!args.type)
++ args.type = h_inode->i_mode & S_IFMT;
++ if (args.type != S_IFDIR)
++ break;
++ else if (isdir) {
++ /* the type of lower may be different */
++ bdiropq = au_dbdiropq(dentry);
++ if (bdiropq >= 0 && bdiropq <= bindex)
++ break;
++ }
++ }
++
++ if (npositive) {
++ AuLabel(positive);
++ au_update_dbstart(dentry);
++ }
++ err = npositive;
++ if (unlikely(!au_opt_test(au_mntflags(dentry->d_sb), UDBA_NONE)
++ && au_dbstart(dentry) < 0))
++ /* both of real entry and whiteout found */
++ err = -EIO;
++
++ out_wh:
++ kfree(whname.name);
++ out:
++ dput(parent);
++ return err;
++}
++
++struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent,
++ struct au_branch *br)
++{
++ struct dentry *dentry;
++ int wkq_err;
++
++ if (!au_test_h_perm_sio(parent->d_inode, MAY_EXEC))
++ dentry = au_lkup_one(name, parent, br, /*nd*/NULL);
++ else {
++ struct au_lkup_one_args args = {
++ .errp = &dentry,
++ .name = name,
++ .h_parent = parent,
++ .br = br,
++ .nd = NULL
++ };
++
++ wkq_err = au_wkq_wait(au_call_lkup_one, &args);
++ if (unlikely(wkq_err))
++ dentry = ERR_PTR(wkq_err);
++ }
++
++ return dentry;
++}
++
++/*
++ * lookup @dentry on @bindex which should be negative.
++ */
++int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ int err;
++ struct dentry *parent, *h_parent, *h_dentry;
++ struct qstr *name;
++
++ name = &dentry->d_name;
++ parent = dget_parent(dentry);
++ h_parent = au_h_dptr(parent, bindex);
++ h_dentry = au_sio_lkup_one(name, h_parent,
++ au_sbr(dentry->d_sb, bindex));
++ err = PTR_ERR(h_dentry);
++ if (IS_ERR(h_dentry))
++ goto out;
++ if (unlikely(h_dentry->d_inode)) {
++ err = -EIO;
++ AuIOErr("b%d %.*s should be negative.\n",
++ bindex, AuDLNPair(h_dentry));
++ dput(h_dentry);
++ goto out;
++ }
++
++ if (bindex < au_dbstart(dentry))
++ au_set_dbstart(dentry, bindex);
++ if (au_dbend(dentry) < bindex)
++ au_set_dbend(dentry, bindex);
++ au_set_h_dptr(dentry, bindex, h_dentry);
++ err = 0;
++
++ out:
++ dput(parent);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* subset of struct inode */
++struct au_iattr {
++ unsigned long i_ino;
++ /* unsigned int i_nlink; */
++ uid_t i_uid;
++ gid_t i_gid;
++ u64 i_version;
++/*
++ loff_t i_size;
++ blkcnt_t i_blocks;
++*/
++ umode_t i_mode;
++};
++
++static void au_iattr_save(struct au_iattr *ia, struct inode *h_inode)
++{
++ ia->i_ino = h_inode->i_ino;
++ /* ia->i_nlink = h_inode->i_nlink; */
++ ia->i_uid = h_inode->i_uid;
++ ia->i_gid = h_inode->i_gid;
++ ia->i_version = h_inode->i_version;
++/*
++ ia->i_size = h_inode->i_size;
++ ia->i_blocks = h_inode->i_blocks;
++*/
++ ia->i_mode = (h_inode->i_mode & S_IFMT);
++}
++
++static int au_iattr_test(struct au_iattr *ia, struct inode *h_inode)
++{
++ return ia->i_ino != h_inode->i_ino
++ /* || ia->i_nlink != h_inode->i_nlink */
++ || ia->i_uid != h_inode->i_uid
++ || ia->i_gid != h_inode->i_gid
++ || ia->i_version != h_inode->i_version
++/*
++ || ia->i_size != h_inode->i_size
++ || ia->i_blocks != h_inode->i_blocks
++*/
++ || ia->i_mode != (h_inode->i_mode & S_IFMT);
++}
++
++static int au_h_verify_dentry(struct dentry *h_dentry, struct dentry *h_parent,
++ struct au_branch *br)
++{
++ int err;
++ struct au_iattr ia;
++ struct inode *h_inode;
++ struct dentry *h_d;
++ struct super_block *h_sb;
++
++ err = 0;
++ memset(&ia, -1, sizeof(ia));
++ h_sb = h_dentry->d_sb;
++ h_inode = h_dentry->d_inode;
++ if (h_inode)
++ au_iattr_save(&ia, h_inode);
++ else if (au_test_nfs(h_sb) || au_test_fuse(h_sb))
++ /* nfs d_revalidate may return 0 for negative dentry */
++ /* fuse d_revalidate always return 0 for negative dentry */
++ goto out;
++
++ /* main purpose is namei.c:cached_lookup() and d_revalidate */
++ h_d = au_lkup_one(&h_dentry->d_name, h_parent, br, /*nd*/NULL);
++ err = PTR_ERR(h_d);
++ if (IS_ERR(h_d))
++ goto out;
++
++ err = 0;
++ if (unlikely(h_d != h_dentry
++ || h_d->d_inode != h_inode
++ || (h_inode && au_iattr_test(&ia, h_inode))))
++ err = au_busy_or_stale();
++ dput(h_d);
++
++ out:
++ AuTraceErr(err);
++ return err;
++}
++
++int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir,
++ struct dentry *h_parent, struct au_branch *br)
++{
++ int err;
++
++ err = 0;
++ if (udba == AuOpt_UDBA_REVAL) {
++ IMustLock(h_dir);
++ err = (h_dentry->d_parent->d_inode != h_dir);
++ } else if (udba == AuOpt_UDBA_HINOTIFY)
++ err = au_h_verify_dentry(h_dentry, h_parent, br);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void au_do_refresh_hdentry(struct au_hdentry *p, struct au_dinfo *dinfo,
++ struct dentry *parent)
++{
++ struct dentry *h_d, *h_dp;
++ struct au_hdentry tmp, *q;
++ struct super_block *sb;
++ aufs_bindex_t new_bindex, bindex, bend, bwh, bdiropq;
++
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ bend = dinfo->di_bend;
++ bwh = dinfo->di_bwh;
++ bdiropq = dinfo->di_bdiropq;
++ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++, p++) {
++ h_d = p->hd_dentry;
++ if (!h_d)
++ continue;
++
++ h_dp = dget_parent(h_d);
++ if (h_dp == au_h_dptr(parent, bindex)) {
++ dput(h_dp);
++ continue;
++ }
++
++ new_bindex = au_find_dbindex(parent, h_dp);
++ dput(h_dp);
++ if (dinfo->di_bwh == bindex)
++ bwh = new_bindex;
++ if (dinfo->di_bdiropq == bindex)
++ bdiropq = new_bindex;
++ if (new_bindex < 0) {
++ au_hdput(p);
++ p->hd_dentry = NULL;
++ continue;
++ }
++
++ /* swap two lower dentries, and loop again */
++ q = dinfo->di_hdentry + new_bindex;
++ tmp = *q;
++ *q = *p;
++ *p = tmp;
++ if (tmp.hd_dentry) {
++ bindex--;
++ p--;
++ }
++ }
++
++ sb = parent->d_sb;
++ dinfo->di_bwh = -1;
++ if (bwh >= 0 && bwh <= au_sbend(sb) && au_sbr_whable(sb, bwh))
++ dinfo->di_bwh = bwh;
++
++ dinfo->di_bdiropq = -1;
++ if (bdiropq >= 0
++ && bdiropq <= au_sbend(sb)
++ && au_sbr_whable(sb, bdiropq))
++ dinfo->di_bdiropq = bdiropq;
++
++ bend = au_dbend(parent);
++ p = dinfo->di_hdentry;
++ for (bindex = 0; bindex <= bend; bindex++, p++)
++ if (p->hd_dentry) {
++ dinfo->di_bstart = bindex;
++ break;
++ }
++
++ p = dinfo->di_hdentry + bend;
++ for (bindex = bend; bindex >= 0; bindex--, p--)
++ if (p->hd_dentry) {
++ dinfo->di_bend = bindex;
++ break;
++ }
++}
++
++/*
++ * returns the number of found lower positive dentries,
++ * otherwise an error.
++ */
++int au_refresh_hdentry(struct dentry *dentry, mode_t type)
++{
++ int npositive, err;
++ unsigned int sigen;
++ aufs_bindex_t bstart;
++ struct au_dinfo *dinfo;
++ struct super_block *sb;
++ struct dentry *parent;
++
++ DiMustWriteLock(dentry);
++
++ sb = dentry->d_sb;
++ AuDebugOn(IS_ROOT(dentry));
++ sigen = au_sigen(sb);
++ parent = dget_parent(dentry);
++ AuDebugOn(au_digen(parent) != sigen
++ || au_iigen(parent->d_inode) != sigen);
++
++ dinfo = au_di(dentry);
++ err = au_di_realloc(dinfo, au_sbend(sb) + 1);
++ npositive = err;
++ if (unlikely(err))
++ goto out;
++ au_do_refresh_hdentry(dinfo->di_hdentry + dinfo->di_bstart, dinfo,
++ parent);
++
++ npositive = 0;
++ bstart = au_dbstart(parent);
++ if (type != S_IFDIR && dinfo->di_bstart == bstart)
++ goto out_dgen; /* success */
++
++ npositive = au_lkup_dentry(dentry, bstart, type, /*nd*/NULL);
++ if (npositive < 0)
++ goto out;
++ if (dinfo->di_bwh >= 0 && dinfo->di_bwh <= dinfo->di_bstart)
++ d_drop(dentry);
++
++ out_dgen:
++ au_update_digen(dentry);
++ out:
++ dput(parent);
++ AuTraceErr(npositive);
++ return npositive;
++}
++
++static noinline_for_stack
++int au_do_h_d_reval(struct dentry *h_dentry, struct nameidata *nd,
++ struct dentry *dentry, aufs_bindex_t bindex)
++{
++ int err, valid;
++ int (*reval)(struct dentry *, struct nameidata *);
++
++ err = 0;
++ reval = NULL;
++ if (h_dentry->d_op)
++ reval = h_dentry->d_op->d_revalidate;
++ if (!reval)
++ goto out;
++
++ AuDbg("b%d\n", bindex);
++ if (au_test_fs_null_nd(h_dentry->d_sb))
++ /* it may return tri-state */
++ valid = reval(h_dentry, NULL);
++ else {
++ struct nameidata h_nd;
++ int locked;
++ struct dentry *parent;
++
++ au_h_nd(&h_nd, nd);
++ parent = nd->path.dentry;
++ locked = (nd && nd->path.dentry != dentry);
++ if (locked)
++ di_read_lock_parent(parent, AuLock_IR);
++ BUG_ON(bindex > au_dbend(parent));
++ h_nd.path.dentry = au_h_dptr(parent, bindex);
++ BUG_ON(!h_nd.path.dentry);
++ h_nd.path.mnt = au_sbr(parent->d_sb, bindex)->br_mnt;
++ path_get(&h_nd.path);
++ valid = reval(h_dentry, &h_nd);
++ path_put(&h_nd.path);
++ if (locked)
++ di_read_unlock(parent, AuLock_IR);
++ }
++
++ if (unlikely(valid < 0))
++ err = valid;
++ else if (!valid)
++ err = -EINVAL;
++
++ out:
++ AuTraceErr(err);
++ return err;
++}
++
++/* todo: remove this */
++static int h_d_revalidate(struct dentry *dentry, struct inode *inode,
++ struct nameidata *nd, int do_udba)
++{
++ int err;
++ umode_t mode, h_mode;
++ aufs_bindex_t bindex, btail, bstart, ibs, ibe;
++ unsigned char plus, unhashed, is_root, h_plus;
++ struct inode *first, *h_inode, *h_cached_inode;
++ struct dentry *h_dentry;
++ struct qstr *name, *h_name;
++
++ err = 0;
++ plus = 0;
++ mode = 0;
++ first = NULL;
++ ibs = -1;
++ ibe = -1;
++ unhashed = !!d_unhashed(dentry);
++ is_root = !!IS_ROOT(dentry);
++ name = &dentry->d_name;
++
++ /*
++ * Theoretically, REVAL test should be unnecessary in case of INOTIFY.
++ * But inotify doesn't fire some necessary events,
++ * IN_ATTRIB for atime/nlink/pageio
++ * IN_DELETE for NFS dentry
++ * Let's do REVAL test too.
++ */
++ if (do_udba && inode) {
++ mode = (inode->i_mode & S_IFMT);
++ plus = (inode->i_nlink > 0);
++ first = au_h_iptr(inode, au_ibstart(inode));
++ ibs = au_ibstart(inode);
++ ibe = au_ibend(inode);
++ }
++
++ bstart = au_dbstart(dentry);
++ btail = bstart;
++ if (inode && S_ISDIR(inode->i_mode))
++ btail = au_dbtaildir(dentry);
++ for (bindex = bstart; bindex <= btail; bindex++) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!h_dentry)
++ continue;
++
++ AuDbg("b%d, %.*s\n", bindex, AuDLNPair(h_dentry));
++ h_name = &h_dentry->d_name;
++ if (unlikely(do_udba
++ && !is_root
++ && (unhashed != !!d_unhashed(h_dentry)
++ || name->len != h_name->len
++ || memcmp(name->name, h_name->name, name->len))
++ )) {
++ AuDbg("unhash 0x%x 0x%x, %.*s %.*s\n",
++ unhashed, d_unhashed(h_dentry),
++ AuDLNPair(dentry), AuDLNPair(h_dentry));
++ goto err;
++ }
++
++ err = au_do_h_d_reval(h_dentry, nd, dentry, bindex);
++ if (unlikely(err))
++ /* do not goto err, to keep the errno */
++ break;
++
++ /* todo: plink too? */
++ if (!do_udba)
++ continue;
++
++ /* UDBA tests */
++ h_inode = h_dentry->d_inode;
++ if (unlikely(!!inode != !!h_inode))
++ goto err;
++
++ h_plus = plus;
++ h_mode = mode;
++ h_cached_inode = h_inode;
++ if (h_inode) {
++ h_mode = (h_inode->i_mode & S_IFMT);
++ h_plus = (h_inode->i_nlink > 0);
++ }
++ if (inode && ibs <= bindex && bindex <= ibe)
++ h_cached_inode = au_h_iptr(inode, bindex);
++
++ if (unlikely(plus != h_plus
++ || mode != h_mode
++ || h_cached_inode != h_inode))
++ goto err;
++ continue;
++
++ err:
++ err = -EINVAL;
++ break;
++ }
++
++ return err;
++}
++
++static int simple_reval_dpath(struct dentry *dentry, unsigned int sigen)
++{
++ int err;
++ struct dentry *parent;
++ struct inode *inode;
++
++ inode = dentry->d_inode;
++ if (au_digen(dentry) == sigen && au_iigen(inode) == sigen)
++ return 0;
++
++ parent = dget_parent(dentry);
++ di_read_lock_parent(parent, AuLock_IR);
++ AuDebugOn(au_digen(parent) != sigen
++ || au_iigen(parent->d_inode) != sigen);
++ au_dbg_verify_gen(parent, sigen);
++
++ /* returns a number of positive dentries */
++ err = au_refresh_hdentry(dentry, inode->i_mode & S_IFMT);
++ if (err >= 0)
++ err = au_refresh_hinode(inode, dentry);
++
++ di_read_unlock(parent, AuLock_IR);
++ dput(parent);
++ return err;
++}
++
++int au_reval_dpath(struct dentry *dentry, unsigned int sigen)
++{
++ int err;
++ struct dentry *d, *parent;
++ struct inode *inode;
++
++ if (!au_ftest_si(au_sbi(dentry->d_sb), FAILED_REFRESH_DIRS))
++ return simple_reval_dpath(dentry, sigen);
++
++ /* slow loop, keep it simple and stupid */
++ /* cf: au_cpup_dirs() */
++ err = 0;
++ parent = NULL;
++ while (au_digen(dentry) != sigen
++ || au_iigen(dentry->d_inode) != sigen) {
++ d = dentry;
++ while (1) {
++ dput(parent);
++ parent = dget_parent(d);
++ if (au_digen(parent) == sigen
++ && au_iigen(parent->d_inode) == sigen)
++ break;
++ d = parent;
++ }
++
++ inode = d->d_inode;
++ if (d != dentry)
++ di_write_lock_child(d);
++
++ /* someone might update our dentry while we were sleeping */
++ if (au_digen(d) != sigen || au_iigen(d->d_inode) != sigen) {
++ di_read_lock_parent(parent, AuLock_IR);
++ /* returns a number of positive dentries */
++ err = au_refresh_hdentry(d, inode->i_mode & S_IFMT);
++ if (err >= 0)
++ err = au_refresh_hinode(inode, d);
++ di_read_unlock(parent, AuLock_IR);
++ }
++
++ if (d != dentry)
++ di_write_unlock(d);
++ dput(parent);
++ if (unlikely(err))
++ break;
++ }
++
++ return err;
++}
++
++/*
++ * if valid returns 1, otherwise 0.
++ */
++static int aufs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
++{
++ int valid, err;
++ unsigned int sigen;
++ unsigned char do_udba;
++ struct super_block *sb;
++ struct inode *inode;
++
++ err = -EINVAL;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ aufs_read_lock(dentry, AuLock_FLUSH | AuLock_DW);
++ sigen = au_sigen(sb);
++ if (au_digen(dentry) != sigen) {
++ AuDebugOn(IS_ROOT(dentry));
++ if (inode)
++ err = au_reval_dpath(dentry, sigen);
++ if (unlikely(err))
++ goto out_dgrade;
++ AuDebugOn(au_digen(dentry) != sigen);
++ }
++ if (inode && au_iigen(inode) != sigen) {
++ AuDebugOn(IS_ROOT(dentry));
++ err = au_refresh_hinode(inode, dentry);
++ if (unlikely(err))
++ goto out_dgrade;
++ AuDebugOn(au_iigen(inode) != sigen);
++ }
++ di_downgrade_lock(dentry, AuLock_IR);
++
++ AuDebugOn(au_digen(dentry) != sigen);
++ AuDebugOn(inode && au_iigen(inode) != sigen);
++ err = -EINVAL;
++ do_udba = !au_opt_test(au_mntflags(sb), UDBA_NONE);
++ if (do_udba && inode) {
++ aufs_bindex_t bstart = au_ibstart(inode);
++
++ if (bstart >= 0
++ && au_test_higen(inode, au_h_iptr(inode, bstart)))
++ goto out;
++ }
++
++ err = h_d_revalidate(dentry, inode, nd, do_udba);
++ if (unlikely(!err && do_udba && au_dbstart(dentry) < 0))
++ /* both of real entry and whiteout found */
++ err = -EIO;
++ goto out;
++
++ out_dgrade:
++ di_downgrade_lock(dentry, AuLock_IR);
++ out:
++ au_store_oflag(nd, inode);
++ aufs_read_unlock(dentry, AuLock_IR);
++ AuTraceErr(err);
++ valid = !err;
++ if (!valid)
++ AuDbg("%.*s invalid\n", AuDLNPair(dentry));
++ return valid;
++}
++
++static void aufs_d_release(struct dentry *dentry)
++{
++ struct au_dinfo *dinfo;
++ aufs_bindex_t bend, bindex;
++
++ dinfo = dentry->d_fsdata;
++ if (!dinfo)
++ return;
++
++ /* dentry may not be revalidated */
++ bindex = dinfo->di_bstart;
++ if (bindex >= 0) {
++ struct au_hdentry *p;
++
++ bend = dinfo->di_bend;
++ p = dinfo->di_hdentry + bindex;
++ while (bindex++ <= bend) {
++ if (p->hd_dentry)
++ au_hdput(p);
++ p++;
++ }
++ }
++ kfree(dinfo->di_hdentry);
++ AuRwDestroy(&dinfo->di_rwsem);
++ au_cache_free_dinfo(dinfo);
++ au_hin_di_reinit(dentry);
++}
++
++struct dentry_operations aufs_dop = {
++ .d_revalidate = aufs_d_revalidate,
++ .d_release = aufs_d_release
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dentry.h linux-2.6.31.5/fs/aufs/dentry.h
+--- linux-2.6.31.5.orig/fs/aufs/dentry.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dentry.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,231 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * lookup and dentry operations
++ */
++
++#ifndef __AUFS_DENTRY_H__
++#define __AUFS_DENTRY_H__
++
++#ifdef __KERNEL__
++
++#include <linux/dcache.h>
++#include <linux/aufs_type.h>
++#include "rwsem.h"
++
++/* make a single member structure for future use */
++/* todo: remove this structure */
++struct au_hdentry {
++ struct dentry *hd_dentry;
++};
++
++struct au_dinfo {
++ atomic_t di_generation;
++
++ struct au_rwsem di_rwsem;
++ aufs_bindex_t di_bstart, di_bend, di_bwh, di_bdiropq;
++ struct au_hdentry *di_hdentry;
++};
++
++/* ---------------------------------------------------------------------- */
++
++/* dentry.c */
++extern struct dentry_operations aufs_dop;
++struct au_branch;
++struct dentry *au_lkup_one(struct qstr *name, struct dentry *h_parent,
++ struct au_branch *br, struct nameidata *nd);
++struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent,
++ struct au_branch *br);
++int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir,
++ struct dentry *h_parent, struct au_branch *br);
++
++int au_lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type,
++ struct nameidata *nd);
++int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex);
++int au_refresh_hdentry(struct dentry *dentry, mode_t type);
++int au_reval_dpath(struct dentry *dentry, unsigned int sigen);
++
++/* dinfo.c */
++int au_alloc_dinfo(struct dentry *dentry);
++int au_di_realloc(struct au_dinfo *dinfo, int nbr);
++
++void di_read_lock(struct dentry *d, int flags, unsigned int lsc);
++void di_read_unlock(struct dentry *d, int flags);
++void di_downgrade_lock(struct dentry *d, int flags);
++void di_write_lock(struct dentry *d, unsigned int lsc);
++void di_write_unlock(struct dentry *d);
++void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir);
++void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir);
++void di_write_unlock2(struct dentry *d1, struct dentry *d2);
++
++struct dentry *au_h_dptr(struct dentry *dentry, aufs_bindex_t bindex);
++aufs_bindex_t au_dbtail(struct dentry *dentry);
++aufs_bindex_t au_dbtaildir(struct dentry *dentry);
++
++void au_set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_dentry);
++void au_update_digen(struct dentry *dentry);
++void au_update_dbrange(struct dentry *dentry, int do_put_zero);
++void au_update_dbstart(struct dentry *dentry);
++void au_update_dbend(struct dentry *dentry);
++int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry);
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct au_dinfo *au_di(struct dentry *dentry)
++{
++ return dentry->d_fsdata;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* lock subclass for dinfo */
++enum {
++ AuLsc_DI_CHILD, /* child first */
++ AuLsc_DI_CHILD2, /* rename(2), link(2), and cpup at hinotify */
++ AuLsc_DI_CHILD3, /* copyup dirs */
++ AuLsc_DI_PARENT,
++ AuLsc_DI_PARENT2,
++ AuLsc_DI_PARENT3
++};
++
++/*
++ * di_read_lock_child, di_write_lock_child,
++ * di_read_lock_child2, di_write_lock_child2,
++ * di_read_lock_child3, di_write_lock_child3,
++ * di_read_lock_parent, di_write_lock_parent,
++ * di_read_lock_parent2, di_write_lock_parent2,
++ * di_read_lock_parent3, di_write_lock_parent3,
++ */
++#define AuReadLockFunc(name, lsc) \
++static inline void di_read_lock_##name(struct dentry *d, int flags) \
++{ di_read_lock(d, flags, AuLsc_DI_##lsc); }
++
++#define AuWriteLockFunc(name, lsc) \
++static inline void di_write_lock_##name(struct dentry *d) \
++{ di_write_lock(d, AuLsc_DI_##lsc); }
++
++#define AuRWLockFuncs(name, lsc) \
++ AuReadLockFunc(name, lsc) \
++ AuWriteLockFunc(name, lsc)
++
++AuRWLockFuncs(child, CHILD);
++AuRWLockFuncs(child2, CHILD2);
++AuRWLockFuncs(child3, CHILD3);
++AuRWLockFuncs(parent, PARENT);
++AuRWLockFuncs(parent2, PARENT2);
++AuRWLockFuncs(parent3, PARENT3);
++
++#undef AuReadLockFunc
++#undef AuWriteLockFunc
++#undef AuRWLockFuncs
++
++#define DiMustNoWaiters(d) AuRwMustNoWaiters(&au_di(d)->di_rwsem)
++#define DiMustAnyLock(d) AuRwMustAnyLock(&au_di(d)->di_rwsem)
++#define DiMustWriteLock(d) AuRwMustWriteLock(&au_di(d)->di_rwsem)
++
++/* ---------------------------------------------------------------------- */
++
++/* todo: memory barrier? */
++static inline unsigned int au_digen(struct dentry *d)
++{
++ return atomic_read(&au_di(d)->di_generation);
++}
++
++static inline void au_h_dentry_init(struct au_hdentry *hdentry)
++{
++ hdentry->hd_dentry = NULL;
++}
++
++static inline void au_hdput(struct au_hdentry *hd)
++{
++ dput(hd->hd_dentry);
++}
++
++static inline aufs_bindex_t au_dbstart(struct dentry *dentry)
++{
++ DiMustAnyLock(dentry);
++ return au_di(dentry)->di_bstart;
++}
++
++static inline aufs_bindex_t au_dbend(struct dentry *dentry)
++{
++ DiMustAnyLock(dentry);
++ return au_di(dentry)->di_bend;
++}
++
++static inline aufs_bindex_t au_dbwh(struct dentry *dentry)
++{
++ DiMustAnyLock(dentry);
++ return au_di(dentry)->di_bwh;
++}
++
++static inline aufs_bindex_t au_dbdiropq(struct dentry *dentry)
++{
++ DiMustAnyLock(dentry);
++ return au_di(dentry)->di_bdiropq;
++}
++
++/* todo: hard/soft set? */
++static inline void au_set_dbstart(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ DiMustWriteLock(dentry);
++ au_di(dentry)->di_bstart = bindex;
++}
++
++static inline void au_set_dbend(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ DiMustWriteLock(dentry);
++ au_di(dentry)->di_bend = bindex;
++}
++
++static inline void au_set_dbwh(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ DiMustWriteLock(dentry);
++ /* dbwh can be outside of bstart - bend range */
++ au_di(dentry)->di_bwh = bindex;
++}
++
++static inline void au_set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ DiMustWriteLock(dentry);
++ au_di(dentry)->di_bdiropq = bindex;
++}
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_HINOTIFY
++static inline void au_digen_dec(struct dentry *d)
++{
++ atomic_dec_return(&au_di(d)->di_generation);
++}
++
++static inline void au_hin_di_reinit(struct dentry *dentry)
++{
++ dentry->d_fsdata = NULL;
++}
++#else
++static inline void au_hin_di_reinit(struct dentry *dentry __maybe_unused)
++{
++ /* empty */
++}
++#endif /* CONFIG_AUFS_HINOTIFY */
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_DENTRY_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dinfo.c linux-2.6.31.5/fs/aufs/dinfo.c
+--- linux-2.6.31.5.orig/fs/aufs/dinfo.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dinfo.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,367 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * dentry private data
++ */
++
++#include "aufs.h"
++
++int au_alloc_dinfo(struct dentry *dentry)
++{
++ struct au_dinfo *dinfo;
++ struct super_block *sb;
++ int nbr;
++
++ dinfo = au_cache_alloc_dinfo();
++ if (unlikely(!dinfo))
++ goto out;
++
++ sb = dentry->d_sb;
++ nbr = au_sbend(sb) + 1;
++ if (nbr <= 0)
++ nbr = 1;
++ dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry), GFP_NOFS);
++ if (unlikely(!dinfo->di_hdentry))
++ goto out_dinfo;
++
++ atomic_set(&dinfo->di_generation, au_sigen(sb));
++ /* smp_mb(); */ /* atomic_set */
++ au_rw_init_wlock_nested(&dinfo->di_rwsem, AuLsc_DI_CHILD);
++ dinfo->di_bstart = -1;
++ dinfo->di_bend = -1;
++ dinfo->di_bwh = -1;
++ dinfo->di_bdiropq = -1;
++
++ dentry->d_fsdata = dinfo;
++ dentry->d_op = &aufs_dop;
++ return 0; /* success */
++
++ out_dinfo:
++ au_cache_free_dinfo(dinfo);
++ out:
++ return -ENOMEM;
++}
++
++int au_di_realloc(struct au_dinfo *dinfo, int nbr)
++{
++ int err, sz;
++ struct au_hdentry *hdp;
++
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ err = -ENOMEM;
++ sz = sizeof(*hdp) * (dinfo->di_bend + 1);
++ if (!sz)
++ sz = sizeof(*hdp);
++ hdp = au_kzrealloc(dinfo->di_hdentry, sz, sizeof(*hdp) * nbr, GFP_NOFS);
++ if (hdp) {
++ dinfo->di_hdentry = hdp;
++ err = 0;
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void do_ii_write_lock(struct inode *inode, unsigned int lsc)
++{
++ switch (lsc) {
++ case AuLsc_DI_CHILD:
++ ii_write_lock_child(inode);
++ break;
++ case AuLsc_DI_CHILD2:
++ ii_write_lock_child2(inode);
++ break;
++ case AuLsc_DI_CHILD3:
++ ii_write_lock_child3(inode);
++ break;
++ case AuLsc_DI_PARENT:
++ ii_write_lock_parent(inode);
++ break;
++ case AuLsc_DI_PARENT2:
++ ii_write_lock_parent2(inode);
++ break;
++ case AuLsc_DI_PARENT3:
++ ii_write_lock_parent3(inode);
++ break;
++ default:
++ BUG();
++ }
++}
++
++static void do_ii_read_lock(struct inode *inode, unsigned int lsc)
++{
++ switch (lsc) {
++ case AuLsc_DI_CHILD:
++ ii_read_lock_child(inode);
++ break;
++ case AuLsc_DI_CHILD2:
++ ii_read_lock_child2(inode);
++ break;
++ case AuLsc_DI_CHILD3:
++ ii_read_lock_child3(inode);
++ break;
++ case AuLsc_DI_PARENT:
++ ii_read_lock_parent(inode);
++ break;
++ case AuLsc_DI_PARENT2:
++ ii_read_lock_parent2(inode);
++ break;
++ case AuLsc_DI_PARENT3:
++ ii_read_lock_parent3(inode);
++ break;
++ default:
++ BUG();
++ }
++}
++
++void di_read_lock(struct dentry *d, int flags, unsigned int lsc)
++{
++ au_rw_read_lock_nested(&au_di(d)->di_rwsem, lsc);
++ if (d->d_inode) {
++ if (au_ftest_lock(flags, IW))
++ do_ii_write_lock(d->d_inode, lsc);
++ else if (au_ftest_lock(flags, IR))
++ do_ii_read_lock(d->d_inode, lsc);
++ }
++}
++
++void di_read_unlock(struct dentry *d, int flags)
++{
++ if (d->d_inode) {
++ if (au_ftest_lock(flags, IW))
++ ii_write_unlock(d->d_inode);
++ else if (au_ftest_lock(flags, IR))
++ ii_read_unlock(d->d_inode);
++ }
++ au_rw_read_unlock(&au_di(d)->di_rwsem);
++}
++
++void di_downgrade_lock(struct dentry *d, int flags)
++{
++ if (d->d_inode && au_ftest_lock(flags, IR))
++ ii_downgrade_lock(d->d_inode);
++ au_rw_dgrade_lock(&au_di(d)->di_rwsem);
++}
++
++void di_write_lock(struct dentry *d, unsigned int lsc)
++{
++ au_rw_write_lock_nested(&au_di(d)->di_rwsem, lsc);
++ if (d->d_inode)
++ do_ii_write_lock(d->d_inode, lsc);
++}
++
++void di_write_unlock(struct dentry *d)
++{
++ if (d->d_inode)
++ ii_write_unlock(d->d_inode);
++ au_rw_write_unlock(&au_di(d)->di_rwsem);
++}
++
++void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir)
++{
++ AuDebugOn(d1 == d2
++ || d1->d_inode == d2->d_inode
++ || d1->d_sb != d2->d_sb);
++
++ if (isdir && au_test_subdir(d1, d2)) {
++ di_write_lock_child(d1);
++ di_write_lock_child2(d2);
++ } else {
++ /* there should be no races */
++ di_write_lock_child(d2);
++ di_write_lock_child2(d1);
++ }
++}
++
++void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir)
++{
++ AuDebugOn(d1 == d2
++ || d1->d_inode == d2->d_inode
++ || d1->d_sb != d2->d_sb);
++
++ if (isdir && au_test_subdir(d1, d2)) {
++ di_write_lock_parent(d1);
++ di_write_lock_parent2(d2);
++ } else {
++ /* there should be no races */
++ di_write_lock_parent(d2);
++ di_write_lock_parent2(d1);
++ }
++}
++
++void di_write_unlock2(struct dentry *d1, struct dentry *d2)
++{
++ di_write_unlock(d1);
++ if (d1->d_inode == d2->d_inode)
++ au_rw_write_unlock(&au_di(d2)->di_rwsem);
++ else
++ di_write_unlock(d2);
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct dentry *au_h_dptr(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ struct dentry *d;
++
++ DiMustAnyLock(dentry);
++
++ if (au_dbstart(dentry) < 0 || bindex < au_dbstart(dentry))
++ return NULL;
++ AuDebugOn(bindex < 0);
++ d = au_di(dentry)->di_hdentry[0 + bindex].hd_dentry;
++ AuDebugOn(d && (atomic_read(&d->d_count) <= 0));
++ return d;
++}
++
++aufs_bindex_t au_dbtail(struct dentry *dentry)
++{
++ aufs_bindex_t bend, bwh;
++
++ bend = au_dbend(dentry);
++ if (0 <= bend) {
++ bwh = au_dbwh(dentry);
++ if (!bwh)
++ return bwh;
++ if (0 < bwh && bwh < bend)
++ return bwh - 1;
++ }
++ return bend;
++}
++
++aufs_bindex_t au_dbtaildir(struct dentry *dentry)
++{
++ aufs_bindex_t bend, bopq;
++
++ bend = au_dbtail(dentry);
++ if (0 <= bend) {
++ bopq = au_dbdiropq(dentry);
++ if (0 <= bopq && bopq < bend)
++ bend = bopq;
++ }
++ return bend;
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_dentry)
++{
++ struct au_hdentry *hd = au_di(dentry)->di_hdentry + bindex;
++
++ DiMustWriteLock(dentry);
++
++ if (hd->hd_dentry)
++ au_hdput(hd);
++ hd->hd_dentry = h_dentry;
++}
++
++void au_update_digen(struct dentry *dentry)
++{
++ atomic_set(&au_di(dentry)->di_generation, au_sigen(dentry->d_sb));
++ /* smp_mb(); */ /* atomic_set */
++}
++
++void au_update_dbrange(struct dentry *dentry, int do_put_zero)
++{
++ struct au_dinfo *dinfo;
++ struct dentry *h_d;
++
++ DiMustWriteLock(dentry);
++
++ dinfo = au_di(dentry);
++ if (!dinfo || dinfo->di_bstart < 0)
++ return;
++
++ if (do_put_zero) {
++ aufs_bindex_t bindex, bend;
++
++ bend = dinfo->di_bend;
++ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++) {
++ h_d = dinfo->di_hdentry[0 + bindex].hd_dentry;
++ if (h_d && !h_d->d_inode)
++ au_set_h_dptr(dentry, bindex, NULL);
++ }
++ }
++
++ dinfo->di_bstart = -1;
++ while (++dinfo->di_bstart <= dinfo->di_bend)
++ if (dinfo->di_hdentry[0 + dinfo->di_bstart].hd_dentry)
++ break;
++ if (dinfo->di_bstart > dinfo->di_bend) {
++ dinfo->di_bstart = -1;
++ dinfo->di_bend = -1;
++ return;
++ }
++
++ dinfo->di_bend++;
++ while (0 <= --dinfo->di_bend)
++ if (dinfo->di_hdentry[0 + dinfo->di_bend].hd_dentry)
++ break;
++ AuDebugOn(dinfo->di_bstart > dinfo->di_bend || dinfo->di_bend < 0);
++}
++
++void au_update_dbstart(struct dentry *dentry)
++{
++ aufs_bindex_t bindex, bend;
++ struct dentry *h_dentry;
++
++ bend = au_dbend(dentry);
++ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!h_dentry)
++ continue;
++ if (h_dentry->d_inode) {
++ au_set_dbstart(dentry, bindex);
++ return;
++ }
++ au_set_h_dptr(dentry, bindex, NULL);
++ }
++}
++
++void au_update_dbend(struct dentry *dentry)
++{
++ aufs_bindex_t bindex, bstart;
++ struct dentry *h_dentry;
++
++ bstart = au_dbstart(dentry);
++ for (bindex = au_dbend(dentry); bindex <= bstart; bindex--) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!h_dentry)
++ continue;
++ if (h_dentry->d_inode) {
++ au_set_dbend(dentry, bindex);
++ return;
++ }
++ au_set_h_dptr(dentry, bindex, NULL);
++ }
++}
++
++int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry)
++{
++ aufs_bindex_t bindex, bend;
++
++ bend = au_dbend(dentry);
++ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++)
++ if (au_h_dptr(dentry, bindex) == h_dentry)
++ return bindex;
++ return -1;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dir.c linux-2.6.31.5/fs/aufs/dir.c
+--- linux-2.6.31.5.orig/fs/aufs/dir.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dir.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,538 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * directory operations
++ */
++
++#include <linux/file.h>
++#include <linux/fs_stack.h>
++#include "aufs.h"
++
++void au_add_nlink(struct inode *dir, struct inode *h_dir)
++{
++ AuDebugOn(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
++
++ dir->i_nlink += h_dir->i_nlink - 2;
++ if (h_dir->i_nlink < 2)
++ dir->i_nlink += 2;
++}
++
++void au_sub_nlink(struct inode *dir, struct inode *h_dir)
++{
++ AuDebugOn(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
++
++ dir->i_nlink -= h_dir->i_nlink - 2;
++ if (h_dir->i_nlink < 2)
++ dir->i_nlink -= 2;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int reopen_dir(struct file *file)
++{
++ int err;
++ unsigned int flags;
++ aufs_bindex_t bindex, btail, bstart;
++ struct dentry *dentry, *h_dentry;
++ struct file *h_file;
++
++ /* open all lower dirs */
++ dentry = file->f_dentry;
++ bstart = au_dbstart(dentry);
++ for (bindex = au_fbstart(file); bindex < bstart; bindex++)
++ au_set_h_fptr(file, bindex, NULL);
++ au_set_fbstart(file, bstart);
++
++ btail = au_dbtaildir(dentry);
++ for (bindex = au_fbend(file); btail < bindex; bindex--)
++ au_set_h_fptr(file, bindex, NULL);
++ au_set_fbend(file, btail);
++
++ flags = file->f_flags;
++ for (bindex = bstart; bindex <= btail; bindex++) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!h_dentry)
++ continue;
++ h_file = au_h_fptr(file, bindex);
++ if (h_file)
++ continue;
++
++ h_file = au_h_open(dentry, bindex, flags, file);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out; /* close all? */
++ au_set_h_fptr(file, bindex, h_file);
++ }
++ au_update_figen(file);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ err = 0;
++
++ out:
++ return err;
++}
++
++static int do_open_dir(struct file *file, int flags)
++{
++ int err;
++ aufs_bindex_t bindex, btail;
++ struct dentry *dentry, *h_dentry;
++ struct file *h_file;
++
++ FiMustWriteLock(file);
++
++ err = 0;
++ dentry = file->f_dentry;
++ au_set_fvdir_cache(file, NULL);
++ au_fi(file)->fi_maintain_plink = 0;
++ file->f_version = dentry->d_inode->i_version;
++ bindex = au_dbstart(dentry);
++ au_set_fbstart(file, bindex);
++ btail = au_dbtaildir(dentry);
++ au_set_fbend(file, btail);
++ for (; !err && bindex <= btail; bindex++) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!h_dentry)
++ continue;
++
++ h_file = au_h_open(dentry, bindex, flags, file);
++ if (IS_ERR(h_file)) {
++ err = PTR_ERR(h_file);
++ break;
++ }
++ au_set_h_fptr(file, bindex, h_file);
++ }
++ au_update_figen(file);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ if (!err)
++ return 0; /* success */
++
++ /* close all */
++ for (bindex = au_fbstart(file); bindex <= btail; bindex++)
++ au_set_h_fptr(file, bindex, NULL);
++ au_set_fbstart(file, -1);
++ au_set_fbend(file, -1);
++ return err;
++}
++
++static int aufs_open_dir(struct inode *inode __maybe_unused,
++ struct file *file)
++{
++ return au_do_open(file, do_open_dir);
++}
++
++static int aufs_release_dir(struct inode *inode __maybe_unused,
++ struct file *file)
++{
++ struct au_vdir *vdir_cache;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++
++ sb = file->f_dentry->d_sb;
++ si_noflush_read_lock(sb);
++ fi_write_lock(file);
++ vdir_cache = au_fvdir_cache(file);
++ if (vdir_cache)
++ au_vdir_free(vdir_cache);
++ if (au_fi(file)->fi_maintain_plink) {
++ sbinfo = au_sbi(sb);
++ /* clear the flag without write-lock */
++ sbinfo->au_si_status &= ~AuSi_MAINTAIN_PLINK;
++ smp_mb();
++ wake_up_all(&sbinfo->si_plink_wq);
++ }
++ fi_write_unlock(file);
++ au_finfo_fin(file);
++ si_read_unlock(sb);
++ return 0;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_do_fsync_dir_no_file(struct dentry *dentry, int datasync)
++{
++ int err;
++ aufs_bindex_t bend, bindex;
++ struct inode *inode;
++ struct super_block *sb;
++
++ err = 0;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ IMustLock(inode);
++ bend = au_dbend(dentry);
++ for (bindex = au_dbstart(dentry); !err && bindex <= bend; bindex++) {
++ struct path h_path;
++ struct inode *h_inode;
++
++ if (au_test_ro(sb, bindex, inode))
++ continue;
++ h_path.dentry = au_h_dptr(dentry, bindex);
++ if (!h_path.dentry)
++ continue;
++ h_inode = h_path.dentry->d_inode;
++ if (!h_inode)
++ continue;
++
++ /* no mnt_want_write() */
++ /* cf. fs/nsfd/vfs.c and fs/nfsd/nfs4recover.c */
++ /* todo: inotiry fired? */
++ h_path.mnt = au_sbr_mnt(sb, bindex);
++ mutex_lock(&h_inode->i_mutex);
++ err = filemap_fdatawrite(h_inode->i_mapping);
++ AuDebugOn(!h_inode->i_fop);
++ if (!err && h_inode->i_fop->fsync)
++ err = h_inode->i_fop->fsync(NULL, h_path.dentry,
++ datasync);
++ if (!err)
++ err = filemap_fdatawrite(h_inode->i_mapping);
++ if (!err)
++ vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/
++ mutex_unlock(&h_inode->i_mutex);
++ }
++
++ return err;
++}
++
++static int au_do_fsync_dir(struct file *file, int datasync)
++{
++ int err;
++ aufs_bindex_t bend, bindex;
++ struct file *h_file;
++ struct super_block *sb;
++ struct inode *inode;
++ struct mutex *h_mtx;
++
++ err = au_reval_and_lock_fdi(file, reopen_dir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ sb = file->f_dentry->d_sb;
++ inode = file->f_dentry->d_inode;
++ bend = au_fbend(file);
++ for (bindex = au_fbstart(file); !err && bindex <= bend; bindex++) {
++ h_file = au_h_fptr(file, bindex);
++ if (!h_file || au_test_ro(sb, bindex, inode))
++ continue;
++
++ err = vfs_fsync(h_file, h_file->f_dentry, datasync);
++ if (!err) {
++ h_mtx = &h_file->f_dentry->d_inode->i_mutex;
++ mutex_lock(h_mtx);
++ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL);
++ /*ignore*/
++ mutex_unlock(h_mtx);
++ }
++ }
++
++ out:
++ return err;
++}
++
++/*
++ * @file may be NULL
++ */
++static int aufs_fsync_dir(struct file *file, struct dentry *dentry,
++ int datasync)
++{
++ int err;
++ struct super_block *sb;
++
++ IMustLock(dentry->d_inode);
++
++ err = 0;
++ sb = dentry->d_sb;
++ si_noflush_read_lock(sb);
++ if (file)
++ err = au_do_fsync_dir(file, datasync);
++ else {
++ di_write_lock_child(dentry);
++ err = au_do_fsync_dir_no_file(dentry, datasync);
++ }
++ au_cpup_attr_timesizes(dentry->d_inode);
++ di_write_unlock(dentry);
++ if (file)
++ fi_write_unlock(file);
++
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int aufs_readdir(struct file *file, void *dirent, filldir_t filldir)
++{
++ int err;
++ struct dentry *dentry;
++ struct inode *inode;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ inode = dentry->d_inode;
++ IMustLock(inode);
++
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, reopen_dir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++ err = au_vdir_init(file);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++
++ if (!au_test_nfsd(current)) {
++ err = au_vdir_fill_de(file, dirent, filldir);
++ fsstack_copy_attr_atime(inode,
++ au_h_iptr(inode, au_ibstart(inode)));
++ } else {
++ /*
++ * nfsd filldir may call lookup_one_len(), vfs_getattr(),
++ * encode_fh() and others.
++ */
++ struct inode *h_inode = au_h_iptr(inode, au_ibstart(inode));
++
++ di_read_unlock(dentry, AuLock_IR);
++ si_read_unlock(sb);
++ lockdep_off();
++ err = au_vdir_fill_de(file, dirent, filldir);
++ lockdep_on();
++ fsstack_copy_attr_atime(inode, h_inode);
++ fi_write_unlock(file);
++
++ AuTraceErr(err);
++ return err;
++ }
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++#define AuTestEmpty_WHONLY 1
++#define AuTestEmpty_CALLED (1 << 1)
++#define AuTestEmpty_SHWH (1 << 2)
++#define au_ftest_testempty(flags, name) ((flags) & AuTestEmpty_##name)
++#define au_fset_testempty(flags, name) { (flags) |= AuTestEmpty_##name; }
++#define au_fclr_testempty(flags, name) { (flags) &= ~AuTestEmpty_##name; }
++
++#ifndef CONFIG_AUFS_SHWH
++#undef AuTestEmpty_SHWH
++#define AuTestEmpty_SHWH 0
++#endif
++
++struct test_empty_arg {
++ struct au_nhash whlist;
++ unsigned int flags;
++ int err;
++ aufs_bindex_t bindex;
++};
++
++static int test_empty_cb(void *__arg, const char *__name, int namelen,
++ loff_t offset __maybe_unused, u64 ino,
++ unsigned int d_type)
++{
++ struct test_empty_arg *arg = __arg;
++ char *name = (void *)__name;
++
++ arg->err = 0;
++ au_fset_testempty(arg->flags, CALLED);
++ /* smp_mb(); */
++ if (name[0] == '.'
++ && (namelen == 1 || (name[1] == '.' && namelen == 2)))
++ goto out; /* success */
++
++ if (namelen <= AUFS_WH_PFX_LEN
++ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
++ if (au_ftest_testempty(arg->flags, WHONLY)
++ && !au_nhash_test_known_wh(&arg->whlist, name, namelen))
++ arg->err = -ENOTEMPTY;
++ goto out;
++ }
++
++ name += AUFS_WH_PFX_LEN;
++ namelen -= AUFS_WH_PFX_LEN;
++ if (!au_nhash_test_known_wh(&arg->whlist, name, namelen))
++ arg->err = au_nhash_append_wh
++ (&arg->whlist, name, namelen, ino, d_type, arg->bindex,
++ au_ftest_testempty(arg->flags, SHWH));
++
++ out:
++ /* smp_mb(); */
++ AuTraceErr(arg->err);
++ return arg->err;
++}
++
++static int do_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
++{
++ int err;
++ struct file *h_file;
++
++ h_file = au_h_open(dentry, arg->bindex,
++ O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_LARGEFILE,
++ /*file*/NULL);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out;
++
++ err = 0;
++ if (!au_opt_test(au_mntflags(dentry->d_sb), UDBA_NONE)
++ && !h_file->f_dentry->d_inode->i_nlink)
++ goto out_put;
++
++ do {
++ arg->err = 0;
++ au_fclr_testempty(arg->flags, CALLED);
++ /* smp_mb(); */
++ err = vfsub_readdir(h_file, test_empty_cb, arg);
++ if (err >= 0)
++ err = arg->err;
++ } while (!err && au_ftest_testempty(arg->flags, CALLED));
++
++ out_put:
++ fput(h_file);
++ au_sbr_put(dentry->d_sb, arg->bindex);
++ out:
++ return err;
++}
++
++struct do_test_empty_args {
++ int *errp;
++ struct dentry *dentry;
++ struct test_empty_arg *arg;
++};
++
++static void call_do_test_empty(void *args)
++{
++ struct do_test_empty_args *a = args;
++ *a->errp = do_test_empty(a->dentry, a->arg);
++}
++
++static int sio_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
++{
++ int err, wkq_err;
++ struct dentry *h_dentry;
++ struct inode *h_inode;
++
++ h_dentry = au_h_dptr(dentry, arg->bindex);
++ h_inode = h_dentry->d_inode;
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ err = au_test_h_perm_sio(h_inode, MAY_EXEC | MAY_READ);
++ mutex_unlock(&h_inode->i_mutex);
++ if (!err)
++ err = do_test_empty(dentry, arg);
++ else {
++ struct do_test_empty_args args = {
++ .errp = &err,
++ .dentry = dentry,
++ .arg = arg
++ };
++ unsigned int flags = arg->flags;
++
++ wkq_err = au_wkq_wait(call_do_test_empty, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ arg->flags = flags;
++ }
++
++ return err;
++}
++
++int au_test_empty_lower(struct dentry *dentry)
++{
++ int err;
++ aufs_bindex_t bindex, bstart, btail;
++ struct test_empty_arg arg;
++
++ SiMustAnyLock(dentry->d_sb);
++
++ err = au_nhash_alloc(&arg.whlist, au_sbi(dentry->d_sb)->si_rdhash,
++ GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++
++ bstart = au_dbstart(dentry);
++ arg.flags = 0;
++ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH))
++ au_fset_testempty(arg.flags, SHWH);
++ arg.bindex = bstart;
++ err = do_test_empty(dentry, &arg);
++ if (unlikely(err))
++ goto out_whlist;
++
++ au_fset_testempty(arg.flags, WHONLY);
++ btail = au_dbtaildir(dentry);
++ for (bindex = bstart + 1; !err && bindex <= btail; bindex++) {
++ struct dentry *h_dentry;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (h_dentry && h_dentry->d_inode) {
++ arg.bindex = bindex;
++ err = do_test_empty(dentry, &arg);
++ }
++ }
++
++ out_whlist:
++ au_nhash_wh_free(&arg.whlist);
++ out:
++ return err;
++}
++
++int au_test_empty(struct dentry *dentry, struct au_nhash *whlist)
++{
++ int err;
++ struct test_empty_arg arg;
++ aufs_bindex_t bindex, btail;
++
++ err = 0;
++ arg.whlist = *whlist;
++ arg.flags = AuTestEmpty_WHONLY;
++ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH))
++ au_fset_testempty(arg.flags, SHWH);
++ btail = au_dbtaildir(dentry);
++ for (bindex = au_dbstart(dentry); !err && bindex <= btail; bindex++) {
++ struct dentry *h_dentry;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (h_dentry && h_dentry->d_inode) {
++ arg.bindex = bindex;
++ err = sio_test_empty(dentry, &arg);
++ }
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++const struct file_operations aufs_dir_fop = {
++ .read = generic_read_dir,
++ .readdir = aufs_readdir,
++ .unlocked_ioctl = aufs_ioctl_dir,
++ .open = aufs_open_dir,
++ .release = aufs_release_dir,
++ .flush = aufs_flush,
++ .fsync = aufs_fsync_dir
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/dir.h linux-2.6.31.5/fs/aufs/dir.h
+--- linux-2.6.31.5.orig/fs/aufs/dir.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/dir.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,114 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * directory operations
++ */
++
++#ifndef __AUFS_DIR_H__
++#define __AUFS_DIR_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/aufs_type.h>
++
++/* ---------------------------------------------------------------------- */
++
++/* need to be faster and smaller */
++
++struct au_nhash {
++ unsigned int nh_num;
++ struct hlist_head *nh_head;
++};
++
++struct au_vdir_destr {
++ unsigned char len;
++ unsigned char name[0];
++} __packed;
++
++struct au_vdir_dehstr {
++ struct hlist_node hash;
++ struct au_vdir_destr *str;
++};
++
++struct au_vdir_de {
++ ino_t de_ino;
++ unsigned char de_type;
++ /* caution: packed */
++ struct au_vdir_destr de_str;
++} __packed;
++
++struct au_vdir_wh {
++ struct hlist_node wh_hash;
++#ifdef CONFIG_AUFS_SHWH
++ ino_t wh_ino;
++ aufs_bindex_t wh_bindex;
++ unsigned char wh_type;
++#else
++ aufs_bindex_t wh_bindex;
++#endif
++ /* caution: packed */
++ struct au_vdir_destr wh_str;
++} __packed;
++
++union au_vdir_deblk_p {
++ unsigned char *deblk;
++ struct au_vdir_de *de;
++};
++
++struct au_vdir {
++ unsigned char **vd_deblk;
++ unsigned long vd_nblk;
++ struct {
++ unsigned long ul;
++ union au_vdir_deblk_p p;
++ } vd_last;
++
++ unsigned long vd_version;
++ unsigned int vd_deblk_sz;
++ unsigned long vd_jiffy;
++};
++
++/* ---------------------------------------------------------------------- */
++
++/* dir.c */
++extern const struct file_operations aufs_dir_fop;
++void au_add_nlink(struct inode *dir, struct inode *h_dir);
++void au_sub_nlink(struct inode *dir, struct inode *h_dir);
++int au_test_empty_lower(struct dentry *dentry);
++int au_test_empty(struct dentry *dentry, struct au_nhash *whlist);
++
++/* vdir.c */
++int au_nhash_alloc(struct au_nhash *nhash, unsigned int num_hash, gfp_t gfp);
++void au_nhash_wh_free(struct au_nhash *whlist);
++int au_nhash_test_longer_wh(struct au_nhash *whlist, aufs_bindex_t btgt,
++ int limit);
++int au_nhash_test_known_wh(struct au_nhash *whlist, char *name, int nlen);
++int au_nhash_append_wh(struct au_nhash *whlist, char *name, int nlen, ino_t ino,
++ unsigned int d_type, aufs_bindex_t bindex,
++ unsigned char shwh);
++void au_vdir_free(struct au_vdir *vdir);
++int au_vdir_init(struct file *file);
++int au_vdir_fill_de(struct file *file, void *dirent, filldir_t filldir);
++
++/* ioctl.c */
++long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg);
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_DIR_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/export.c linux-2.6.31.5/fs/aufs/export.c
+--- linux-2.6.31.5.orig/fs/aufs/export.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/export.c 2009-11-15 22:27:33.000000000 +0100
+@@ -0,0 +1,746 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * export via nfs
++ */
++
++#include <linux/exportfs.h>
++#include <linux/file.h>
++#include <linux/mnt_namespace.h>
++#include <linux/nsproxy.h>
++#include <linux/namei.h>
++#include <linux/random.h>
++#include "aufs.h"
++
++union conv {
++#ifdef CONFIG_AUFS_INO_T_64
++ __u32 a[2];
++#else
++ __u32 a[1];
++#endif
++ ino_t ino;
++};
++
++static ino_t decode_ino(__u32 *a)
++{
++ union conv u;
++
++ BUILD_BUG_ON(sizeof(u.ino) != sizeof(u.a));
++ u.a[0] = a[0];
++#ifdef CONFIG_AUFS_INO_T_64
++ u.a[1] = a[1];
++#endif
++ return u.ino;
++}
++
++static void encode_ino(__u32 *a, ino_t ino)
++{
++ union conv u;
++
++ u.ino = ino;
++ a[0] = u.a[0];
++#ifdef CONFIG_AUFS_INO_T_64
++ a[1] = u.a[1];
++#endif
++}
++
++/* NFS file handle */
++enum {
++ Fh_br_id,
++ Fh_sigen,
++#ifdef CONFIG_AUFS_INO_T_64
++ /* support 64bit inode number */
++ Fh_ino1,
++ Fh_ino2,
++ Fh_dir_ino1,
++ Fh_dir_ino2,
++#else
++ Fh_ino1,
++ Fh_dir_ino1,
++#endif
++ Fh_igen,
++ Fh_h_type,
++ Fh_tail,
++
++ Fh_ino = Fh_ino1,
++ Fh_dir_ino = Fh_dir_ino1
++};
++
++static int au_test_anon(struct dentry *dentry)
++{
++ return !!(dentry->d_flags & DCACHE_DISCONNECTED);
++}
++
++/* ---------------------------------------------------------------------- */
++/* inode generation external table */
++
++int au_xigen_inc(struct inode *inode)
++{
++ int err;
++ loff_t pos;
++ ssize_t sz;
++ __u32 igen;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++
++ err = 0;
++ sb = inode->i_sb;
++ sbinfo = au_sbi(sb);
++ /*
++ * temporary workaround for escaping from SiMustAnyLock() in
++ * au_mntflags(), since this function is called from au_iinfo_fin().
++ */
++ if (unlikely(!au_opt_test(sbinfo->si_mntflags, XINO)))
++ goto out;
++
++ pos = inode->i_ino;
++ pos *= sizeof(igen);
++ igen = inode->i_generation + 1;
++ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xigen, &igen,
++ sizeof(igen), &pos);
++ if (sz == sizeof(igen))
++ goto out; /* success */
++
++ err = sz;
++ if (unlikely(sz >= 0)) {
++ err = -EIO;
++ AuIOErr("xigen error (%zd)\n", sz);
++ }
++
++ out:
++ return err;
++}
++
++int au_xigen_new(struct inode *inode)
++{
++ int err;
++ loff_t pos;
++ ssize_t sz;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++
++ err = 0;
++ /* todo: dirty, at mount time */
++ if (inode->i_ino == AUFS_ROOT_INO)
++ goto out;
++ sb = inode->i_sb;
++ SiMustAnyLock(sb);
++ if (unlikely(!au_opt_test(au_mntflags(sb), XINO)))
++ goto out;
++
++ err = -EFBIG;
++ pos = inode->i_ino;
++ if (unlikely(au_loff_max / sizeof(inode->i_generation) - 1 < pos)) {
++ AuIOErr1("too large i%lld\n", pos);
++ goto out;
++ }
++ pos *= sizeof(inode->i_generation);
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ file = sbinfo->si_xigen;
++ BUG_ON(!file);
++
++ if (i_size_read(file->f_dentry->d_inode)
++ < pos + sizeof(inode->i_generation)) {
++ inode->i_generation = atomic_inc_return(&sbinfo->si_xigen_next);
++ sz = xino_fwrite(sbinfo->si_xwrite, file, &inode->i_generation,
++ sizeof(inode->i_generation), &pos);
++ } else
++ sz = xino_fread(sbinfo->si_xread, file, &inode->i_generation,
++ sizeof(inode->i_generation), &pos);
++ if (sz == sizeof(inode->i_generation))
++ goto out; /* success */
++
++ err = sz;
++ if (unlikely(sz >= 0)) {
++ err = -EIO;
++ AuIOErr("xigen error (%zd)\n", sz);
++ }
++
++ out:
++ return err;
++}
++
++int au_xigen_set(struct super_block *sb, struct file *base)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ file = au_xino_create2(base, sbinfo->si_xigen);
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++ err = 0;
++ if (sbinfo->si_xigen)
++ fput(sbinfo->si_xigen);
++ sbinfo->si_xigen = file;
++
++ out:
++ return err;
++}
++
++void au_xigen_clr(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ if (sbinfo->si_xigen) {
++ fput(sbinfo->si_xigen);
++ sbinfo->si_xigen = NULL;
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct dentry *decode_by_ino(struct super_block *sb, ino_t ino,
++ ino_t dir_ino)
++{
++ struct dentry *dentry, *d;
++ struct inode *inode;
++ unsigned int sigen;
++
++ dentry = NULL;
++ inode = ilookup(sb, ino);
++ if (!inode)
++ goto out;
++
++ dentry = ERR_PTR(-ESTALE);
++ sigen = au_sigen(sb);
++ if (unlikely(is_bad_inode(inode)
++ || IS_DEADDIR(inode)
++ || sigen != au_iigen(inode)))
++ goto out_iput;
++
++ dentry = NULL;
++ if (!dir_ino || S_ISDIR(inode->i_mode))
++ dentry = d_find_alias(inode);
++ else {
++ spin_lock(&dcache_lock);
++ list_for_each_entry(d, &inode->i_dentry, d_alias)
++ if (!au_test_anon(d)
++ && d->d_parent->d_inode->i_ino == dir_ino) {
++ dentry = dget_locked(d);
++ break;
++ }
++ spin_unlock(&dcache_lock);
++ }
++ if (unlikely(dentry && sigen != au_digen(dentry))) {
++ dput(dentry);
++ dentry = ERR_PTR(-ESTALE);
++ }
++
++ out_iput:
++ iput(inode);
++ out:
++ return dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* todo: dirty? */
++/* if exportfs_decode_fh() passed vfsmount*, we could be happy */
++static struct vfsmount *au_mnt_get(struct super_block *sb)
++{
++ struct mnt_namespace *ns;
++ struct vfsmount *pos, *mnt;
++
++ spin_lock(&vfsmount_lock);
++ /* no get/put ?? */
++ AuDebugOn(!current->nsproxy);
++ ns = current->nsproxy->mnt_ns;
++ AuDebugOn(!ns);
++ mnt = NULL;
++ /* the order (reverse) will not be a problem */
++ list_for_each_entry(pos, &ns->list, mnt_list)
++ if (pos->mnt_sb == sb) {
++ mnt = mntget(pos);
++ break;
++ }
++ spin_unlock(&vfsmount_lock);
++ AuDebugOn(!mnt);
++
++ return mnt;
++}
++
++struct au_nfsd_si_lock {
++ const unsigned int sigen;
++ const aufs_bindex_t br_id;
++ unsigned char force_lock;
++};
++
++static aufs_bindex_t si_nfsd_read_lock(struct super_block *sb,
++ struct au_nfsd_si_lock *nsi_lock)
++{
++ aufs_bindex_t bindex;
++
++ si_read_lock(sb, AuLock_FLUSH);
++
++ /* branch id may be wrapped around */
++ bindex = au_br_index(sb, nsi_lock->br_id);
++ if (bindex >= 0 && nsi_lock->sigen + AUFS_BRANCH_MAX > au_sigen(sb))
++ goto out; /* success */
++
++ if (!nsi_lock->force_lock)
++ si_read_unlock(sb);
++ bindex = -1;
++
++ out:
++ return bindex;
++}
++
++struct find_name_by_ino {
++ int called, found;
++ ino_t ino;
++ char *name;
++ int namelen;
++};
++
++static int
++find_name_by_ino(void *arg, const char *name, int namelen, loff_t offset,
++ u64 ino, unsigned int d_type)
++{
++ struct find_name_by_ino *a = arg;
++
++ a->called++;
++ if (a->ino != ino)
++ return 0;
++
++ memcpy(a->name, name, namelen);
++ a->namelen = namelen;
++ a->found = 1;
++ return 1;
++}
++
++static struct dentry *au_lkup_by_ino(struct path *path, ino_t ino,
++ struct au_nfsd_si_lock *nsi_lock)
++{
++ struct dentry *dentry, *parent;
++ struct file *file;
++ struct inode *dir;
++ struct find_name_by_ino arg;
++ int err;
++
++ parent = path->dentry;
++ if (nsi_lock)
++ si_read_unlock(parent->d_sb);
++ path_get(path);
++ file = dentry_open(parent, path->mnt, au_dir_roflags, current_cred());
++ dentry = (void *)file;
++ if (IS_ERR(file))
++ goto out;
++
++ dentry = ERR_PTR(-ENOMEM);
++ arg.name = __getname();
++ if (unlikely(!arg.name))
++ goto out_file;
++ arg.ino = ino;
++ arg.found = 0;
++ do {
++ arg.called = 0;
++ /* smp_mb(); */
++ err = vfsub_readdir(file, find_name_by_ino, &arg);
++ } while (!err && !arg.found && arg.called);
++ dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out_name;
++ dentry = ERR_PTR(-ENOENT);
++ if (!arg.found)
++ goto out_name;
++
++ /* do not call au_lkup_one() */
++ dir = parent->d_inode;
++ mutex_lock(&dir->i_mutex);
++ dentry = vfsub_lookup_one_len(arg.name, parent, arg.namelen);
++ mutex_unlock(&dir->i_mutex);
++ AuTraceErrPtr(dentry);
++ if (IS_ERR(dentry))
++ goto out_name;
++ AuDebugOn(au_test_anon(dentry));
++ if (unlikely(!dentry->d_inode)) {
++ dput(dentry);
++ dentry = ERR_PTR(-ENOENT);
++ }
++
++ out_name:
++ __putname(arg.name);
++ out_file:
++ fput(file);
++ out:
++ if (unlikely(nsi_lock
++ && si_nfsd_read_lock(parent->d_sb, nsi_lock) < 0))
++ if (!IS_ERR(dentry)) {
++ dput(dentry);
++ dentry = ERR_PTR(-ESTALE);
++ }
++ AuTraceErrPtr(dentry);
++ return dentry;
++}
++
++static struct dentry *decode_by_dir_ino(struct super_block *sb, ino_t ino,
++ ino_t dir_ino,
++ struct au_nfsd_si_lock *nsi_lock)
++{
++ struct dentry *dentry;
++ struct path path;
++
++ if (dir_ino != AUFS_ROOT_INO) {
++ path.dentry = decode_by_ino(sb, dir_ino, 0);
++ dentry = path.dentry;
++ if (!path.dentry || IS_ERR(path.dentry))
++ goto out;
++ AuDebugOn(au_test_anon(path.dentry));
++ } else
++ path.dentry = dget(sb->s_root);
++
++ path.mnt = au_mnt_get(sb);
++ dentry = au_lkup_by_ino(&path, ino, nsi_lock);
++ path_put(&path);
++
++ out:
++ AuTraceErrPtr(dentry);
++ return dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int h_acceptable(void *expv, struct dentry *dentry)
++{
++ return 1;
++}
++
++static char *au_build_path(struct dentry *h_parent, struct path *h_rootpath,
++ char *buf, int len, struct super_block *sb)
++{
++ char *p;
++ int n;
++ struct path path;
++
++ p = d_path(h_rootpath, buf, len);
++ if (IS_ERR(p))
++ goto out;
++ n = strlen(p);
++
++ path.mnt = h_rootpath->mnt;
++ path.dentry = h_parent;
++ p = d_path(&path, buf, len);
++ if (IS_ERR(p))
++ goto out;
++ if (n != 1)
++ p += n;
++
++ path.mnt = au_mnt_get(sb);
++ path.dentry = sb->s_root;
++ p = d_path(&path, buf, len - strlen(p));
++ mntput(path.mnt);
++ if (IS_ERR(p))
++ goto out;
++ if (n != 1)
++ p[strlen(p)] = '/';
++
++ out:
++ AuTraceErrPtr(p);
++ return p;
++}
++
++static
++struct dentry *decode_by_path(struct super_block *sb, aufs_bindex_t bindex,
++ ino_t ino, __u32 *fh, int fh_len,
++ struct au_nfsd_si_lock *nsi_lock)
++{
++ struct dentry *dentry, *h_parent, *root;
++ struct super_block *h_sb;
++ char *pathname, *p;
++ struct vfsmount *h_mnt;
++ struct au_branch *br;
++ int err;
++ struct path path;
++
++ br = au_sbr(sb, bindex);
++ /* au_br_get(br); */
++ h_mnt = br->br_mnt;
++ h_sb = h_mnt->mnt_sb;
++ /* todo: call lower fh_to_dentry()? fh_to_parent()? */
++ h_parent = exportfs_decode_fh(h_mnt, (void *)(fh + Fh_tail),
++ fh_len - Fh_tail, fh[Fh_h_type],
++ h_acceptable, /*context*/NULL);
++ dentry = h_parent;
++ if (unlikely(!h_parent || IS_ERR(h_parent))) {
++ AuWarn1("%s decode_fh failed, %ld\n",
++ au_sbtype(h_sb), PTR_ERR(h_parent));
++ goto out;
++ }
++ dentry = NULL;
++ if (unlikely(au_test_anon(h_parent))) {
++ AuWarn1("%s decode_fh returned a disconnected dentry\n",
++ au_sbtype(h_sb));
++ goto out_h_parent;
++ }
++
++ dentry = ERR_PTR(-ENOMEM);
++ pathname = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!pathname))
++ goto out_h_parent;
++
++ root = sb->s_root;
++ path.mnt = h_mnt;
++ di_read_lock_parent(root, !AuLock_IR);
++ path.dentry = au_h_dptr(root, bindex);
++ di_read_unlock(root, !AuLock_IR);
++ p = au_build_path(h_parent, &path, pathname, PAGE_SIZE, sb);
++ dentry = (void *)p;
++ if (IS_ERR(p))
++ goto out_pathname;
++
++ si_read_unlock(sb);
++ err = vfsub_kern_path(p, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
++ dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out_relock;
++
++ dentry = ERR_PTR(-ENOENT);
++ AuDebugOn(au_test_anon(path.dentry));
++ if (unlikely(!path.dentry->d_inode))
++ goto out_path;
++
++ if (ino != path.dentry->d_inode->i_ino)
++ dentry = au_lkup_by_ino(&path, ino, /*nsi_lock*/NULL);
++ else
++ dentry = dget(path.dentry);
++
++ out_path:
++ path_put(&path);
++ out_relock:
++ if (unlikely(si_nfsd_read_lock(sb, nsi_lock) < 0))
++ if (!IS_ERR(dentry)) {
++ dput(dentry);
++ dentry = ERR_PTR(-ESTALE);
++ }
++ out_pathname:
++ free_page((unsigned long)pathname);
++ out_h_parent:
++ dput(h_parent);
++ out:
++ /* au_br_put(br); */
++ AuTraceErrPtr(dentry);
++ return dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct dentry *
++aufs_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len,
++ int fh_type)
++{
++ struct dentry *dentry;
++ __u32 *fh = fid->raw;
++ ino_t ino, dir_ino;
++ aufs_bindex_t bindex;
++ struct au_nfsd_si_lock nsi_lock = {
++ .sigen = fh[Fh_sigen],
++ .br_id = fh[Fh_br_id],
++ .force_lock = 0
++ };
++
++ AuDebugOn(fh_len < Fh_tail);
++
++ dentry = ERR_PTR(-ESTALE);
++ /* branch id may be wrapped around */
++ bindex = si_nfsd_read_lock(sb, &nsi_lock);
++ if (unlikely(bindex < 0))
++ goto out;
++ nsi_lock.force_lock = 1;
++
++ /* is this inode still cached? */
++ ino = decode_ino(fh + Fh_ino);
++ AuDebugOn(ino == AUFS_ROOT_INO);
++ dir_ino = decode_ino(fh + Fh_dir_ino);
++ dentry = decode_by_ino(sb, ino, dir_ino);
++ if (IS_ERR(dentry))
++ goto out_unlock;
++ if (dentry)
++ goto accept;
++
++ /* is the parent dir cached? */
++ dentry = decode_by_dir_ino(sb, ino, dir_ino, &nsi_lock);
++ if (IS_ERR(dentry))
++ goto out_unlock;
++ if (dentry)
++ goto accept;
++
++ /* lookup path */
++ dentry = decode_by_path(sb, bindex, ino, fh, fh_len, &nsi_lock);
++ if (IS_ERR(dentry))
++ goto out_unlock;
++ if (unlikely(!dentry))
++ /* todo?: make it ESTALE */
++ goto out_unlock;
++
++ accept:
++ if (dentry->d_inode->i_generation == fh[Fh_igen])
++ goto out_unlock; /* success */
++
++ dput(dentry);
++ dentry = ERR_PTR(-ESTALE);
++ out_unlock:
++ si_read_unlock(sb);
++ out:
++ AuTraceErrPtr(dentry);
++ return dentry;
++}
++
++#if 0 /* reserved for future use */
++/* support subtreecheck option */
++static struct dentry *aufs_fh_to_parent(struct super_block *sb, struct fid *fid,
++ int fh_len, int fh_type)
++{
++ struct dentry *parent;
++ __u32 *fh = fid->raw;
++ ino_t dir_ino;
++
++ dir_ino = decode_ino(fh + Fh_dir_ino);
++ parent = decode_by_ino(sb, dir_ino, 0);
++ if (IS_ERR(parent))
++ goto out;
++ if (!parent)
++ parent = decode_by_path(sb, au_br_index(sb, fh[Fh_br_id]),
++ dir_ino, fh, fh_len);
++
++ out:
++ AuTraceErrPtr(parent);
++ return parent;
++}
++#endif
++
++/* ---------------------------------------------------------------------- */
++
++static int aufs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len,
++ int connectable)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ struct super_block *sb, *h_sb;
++ struct inode *inode;
++ struct dentry *parent, *h_parent;
++ struct au_branch *br;
++
++ AuDebugOn(au_test_anon(dentry));
++
++ parent = NULL;
++ err = -ENOSPC;
++ if (unlikely(*max_len <= Fh_tail)) {
++ AuWarn1("NFSv2 client (max_len %d)?\n", *max_len);
++ goto out;
++ }
++
++ err = FILEID_ROOT;
++ if (IS_ROOT(dentry)) {
++ AuDebugOn(dentry->d_inode->i_ino != AUFS_ROOT_INO);
++ goto out;
++ }
++
++ err = -EIO;
++ h_parent = NULL;
++ sb = dentry->d_sb;
++ aufs_read_lock(dentry, AuLock_FLUSH | AuLock_IR);
++ parent = dget_parent(dentry);
++ di_read_lock_parent(parent, !AuLock_IR);
++ inode = dentry->d_inode;
++ AuDebugOn(!inode);
++#ifdef CONFIG_AUFS_DEBUG
++ if (unlikely(!au_opt_test(au_mntflags(sb), XINO)))
++ AuWarn1("NFS-exporting requires xino\n");
++#endif
++
++ bend = au_dbtaildir(parent);
++ for (bindex = au_dbstart(parent); bindex <= bend; bindex++) {
++ h_parent = au_h_dptr(parent, bindex);
++ if (h_parent) {
++ dget(h_parent);
++ break;
++ }
++ }
++ if (unlikely(!h_parent))
++ goto out_unlock;
++
++ err = -EPERM;
++ br = au_sbr(sb, bindex);
++ h_sb = br->br_mnt->mnt_sb;
++ if (unlikely(!h_sb->s_export_op)) {
++ AuErr1("%s branch is not exportable\n", au_sbtype(h_sb));
++ goto out_dput;
++ }
++
++ fh[Fh_br_id] = br->br_id;
++ fh[Fh_sigen] = au_sigen(sb);
++ encode_ino(fh + Fh_ino, inode->i_ino);
++ encode_ino(fh + Fh_dir_ino, parent->d_inode->i_ino);
++ fh[Fh_igen] = inode->i_generation;
++
++ *max_len -= Fh_tail;
++ fh[Fh_h_type] = exportfs_encode_fh(h_parent, (void *)(fh + Fh_tail),
++ max_len,
++ /*connectable or subtreecheck*/0);
++ err = fh[Fh_h_type];
++ *max_len += Fh_tail;
++ /* todo: macros? */
++ if (err != 255)
++ err = 99;
++ else
++ AuWarn1("%s encode_fh failed\n", au_sbtype(h_sb));
++
++ out_dput:
++ dput(h_parent);
++ out_unlock:
++ di_read_unlock(parent, !AuLock_IR);
++ dput(parent);
++ aufs_read_unlock(dentry, AuLock_IR);
++ out:
++ if (unlikely(err < 0))
++ err = 255;
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct export_operations aufs_export_op = {
++ .fh_to_dentry = aufs_fh_to_dentry,
++ /* .fh_to_parent = aufs_fh_to_parent, */
++ .encode_fh = aufs_encode_fh
++};
++
++void au_export_init(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++ __u32 u;
++
++ sb->s_export_op = &aufs_export_op;
++ sbinfo = au_sbi(sb);
++ sbinfo->si_xigen = NULL;
++ get_random_bytes(&u, sizeof(u));
++ BUILD_BUG_ON(sizeof(u) != sizeof(int));
++ atomic_set(&sbinfo->si_xigen_next, u);
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/file.c linux-2.6.31.5/fs/aufs/file.c
+--- linux-2.6.31.5.orig/fs/aufs/file.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/file.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,578 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * handling file/dir, and address_space operation
++ */
++
++#include <linux/file.h>
++#include <linux/fsnotify.h>
++#include <linux/namei.h>
++#include <linux/pagemap.h>
++#include "aufs.h"
++
++/*
++ * a dirty trick for handling deny_write_access().
++ * because FMODE_EXEC flag is not passed to f_op->open(),
++ * set it to file->private_data temporary.
++ */
++void au_store_oflag(struct nameidata *nd, struct inode *inode)
++{
++ if (nd
++ /* && !(nd->flags & LOOKUP_CONTINUE) */
++ && (nd->flags & LOOKUP_OPEN)
++ && (nd->intent.open.flags & vfsub_fmode_to_uint(FMODE_EXEC))
++ && inode
++ && S_ISREG(inode->i_mode)) {
++ /* suppress a warning in lp64 */
++ unsigned long flags = nd->intent.open.flags;
++ nd->intent.open.file->private_data = (void *)flags;
++ /* smp_mb(); */
++ }
++}
++
++/* drop flags for writing */
++unsigned int au_file_roflags(unsigned int flags)
++{
++ flags &= ~(O_WRONLY | O_RDWR | O_APPEND | O_CREAT | O_TRUNC);
++ flags |= O_RDONLY | O_NOATIME;
++ return flags;
++}
++
++/* common functions to regular file and dir */
++struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags,
++ struct file *file)
++{
++ struct file *h_file;
++ struct dentry *h_dentry;
++ struct inode *h_inode;
++ struct super_block *sb;
++ struct au_branch *br;
++ int err;
++
++ /* a race condition can happen between open and unlink/rmdir */
++ h_file = ERR_PTR(-ENOENT);
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (au_test_nfsd(current) && !h_dentry)
++ goto out;
++ h_inode = h_dentry->d_inode;
++ if (au_test_nfsd(current) && !h_inode)
++ goto out;
++ if (unlikely((!d_unhashed(dentry) && d_unhashed(h_dentry))
++ || !h_inode))
++ goto out;
++
++ sb = dentry->d_sb;
++ br = au_sbr(sb, bindex);
++ h_file = ERR_PTR(-EACCES);
++ if (file && (file->f_mode & FMODE_EXEC)
++ && (br->br_mnt->mnt_flags & MNT_NOEXEC))
++ goto out;
++
++ /* drop flags for writing */
++ if (au_test_ro(sb, bindex, dentry->d_inode))
++ flags = au_file_roflags(flags);
++ flags &= ~O_CREAT;
++ atomic_inc(&br->br_count);
++ h_file = dentry_open(dget(h_dentry), mntget(br->br_mnt), flags,
++ current_cred());
++ if (IS_ERR(h_file))
++ goto out_br;
++
++ if (file && (file->f_mode & FMODE_EXEC)) {
++ h_file->f_mode |= FMODE_EXEC;
++ err = deny_write_access(h_file);
++ if (unlikely(err)) {
++ fput(h_file);
++ h_file = ERR_PTR(err);
++ goto out_br;
++ }
++ }
++ fsnotify_open(h_dentry);
++ goto out; /* success */
++
++ out_br:
++ atomic_dec(&br->br_count);
++ out:
++ return h_file;
++}
++
++int au_do_open(struct file *file, int (*open)(struct file *file, int flags))
++{
++ int err;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_finfo_init(file);
++ if (unlikely(err))
++ goto out;
++
++ di_read_lock_child(dentry, AuLock_IR);
++ err = open(file, file->f_flags);
++ di_read_unlock(dentry, AuLock_IR);
++
++ fi_write_unlock(file);
++ if (unlikely(err))
++ au_finfo_fin(file);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++int au_reopen_nondir(struct file *file)
++{
++ int err;
++ aufs_bindex_t bstart, bindex, bend;
++ struct dentry *dentry;
++ struct file *h_file, *h_file_tmp;
++
++ dentry = file->f_dentry;
++ bstart = au_dbstart(dentry);
++ h_file_tmp = NULL;
++ if (au_fbstart(file) == bstart) {
++ h_file = au_h_fptr(file, bstart);
++ if (file->f_mode == h_file->f_mode)
++ return 0; /* success */
++ h_file_tmp = h_file;
++ get_file(h_file_tmp);
++ au_set_h_fptr(file, bstart, NULL);
++ }
++ AuDebugOn(au_fbstart(file) < bstart
++ || au_fi(file)->fi_hfile[0 + bstart].hf_file);
++
++ h_file = au_h_open(dentry, bstart, file->f_flags & ~O_TRUNC, file);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out; /* todo: close all? */
++
++ err = 0;
++ au_set_fbstart(file, bstart);
++ au_set_h_fptr(file, bstart, h_file);
++ au_update_figen(file);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++
++ /* close lower files */
++ bend = au_fbend(file);
++ for (bindex = bstart + 1; bindex <= bend; bindex++)
++ au_set_h_fptr(file, bindex, NULL);
++ au_set_fbend(file, bstart);
++
++ out:
++ if (h_file_tmp)
++ fput(h_file_tmp);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_reopen_wh(struct file *file, aufs_bindex_t btgt,
++ struct dentry *hi_wh)
++{
++ int err;
++ aufs_bindex_t bstart;
++ struct au_dinfo *dinfo;
++ struct dentry *h_dentry;
++
++ dinfo = au_di(file->f_dentry);
++ AuRwMustWriteLock(&dinfo->di_rwsem);
++
++ bstart = dinfo->di_bstart;
++ dinfo->di_bstart = btgt;
++ h_dentry = dinfo->di_hdentry[0 + btgt].hd_dentry;
++ dinfo->di_hdentry[0 + btgt].hd_dentry = hi_wh;
++ err = au_reopen_nondir(file);
++ dinfo->di_hdentry[0 + btgt].hd_dentry = h_dentry;
++ dinfo->di_bstart = bstart;
++
++ return err;
++}
++
++static int au_ready_to_write_wh(struct file *file, loff_t len,
++ aufs_bindex_t bcpup)
++{
++ int err;
++ struct inode *inode;
++ struct dentry *dentry, *hi_wh;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ inode = dentry->d_inode;
++ hi_wh = au_hi_wh(inode, bcpup);
++ if (!hi_wh)
++ err = au_sio_cpup_wh(dentry, bcpup, len, file);
++ else
++ /* already copied-up after unlink */
++ err = au_reopen_wh(file, bcpup, hi_wh);
++
++ sb = dentry->d_sb;
++ if (!err && inode->i_nlink > 1 && au_opt_test(au_mntflags(sb), PLINK))
++ au_plink_append(inode, bcpup, au_h_dptr(dentry, bcpup));
++
++ return err;
++}
++
++/*
++ * prepare the @file for writing.
++ */
++int au_ready_to_write(struct file *file, loff_t len, struct au_pin *pin)
++{
++ int err;
++ aufs_bindex_t bstart, bcpup;
++ struct dentry *dentry, *parent, *h_dentry;
++ struct inode *h_inode, *inode;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ bstart = au_fbstart(file);
++ inode = dentry->d_inode;
++ err = au_test_ro(sb, bstart, inode);
++ if (!err && (au_h_fptr(file, bstart)->f_mode & FMODE_WRITE)) {
++ err = au_pin(pin, dentry, bstart, AuOpt_UDBA_NONE, /*flags*/0);
++ goto out;
++ }
++
++ /* need to cpup */
++ parent = dget_parent(dentry);
++ di_write_lock_parent(parent);
++ err = AuWbrCopyup(au_sbi(sb), dentry);
++ bcpup = err;
++ if (unlikely(err < 0))
++ goto out_dgrade;
++ err = 0;
++
++ if (!au_h_dptr(parent, bcpup)) {
++ err = au_cpup_dirs(dentry, bcpup);
++ if (unlikely(err))
++ goto out_dgrade;
++ }
++
++ err = au_pin(pin, dentry, bcpup, AuOpt_UDBA_NONE,
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ if (unlikely(err))
++ goto out_dgrade;
++
++ h_dentry = au_h_fptr(file, bstart)->f_dentry;
++ h_inode = h_dentry->d_inode;
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ if (d_unhashed(dentry) /* || d_unhashed(h_dentry) */
++ /* || !h_inode->i_nlink */) {
++ err = au_ready_to_write_wh(file, len, bcpup);
++ di_downgrade_lock(parent, AuLock_IR);
++ } else {
++ di_downgrade_lock(parent, AuLock_IR);
++ if (!au_h_dptr(dentry, bcpup))
++ err = au_sio_cpup_simple(dentry, bcpup, len,
++ AuCpup_DTIME);
++ if (!err)
++ err = au_reopen_nondir(file);
++ }
++ mutex_unlock(&h_inode->i_mutex);
++
++ if (!err) {
++ au_pin_set_parent_lflag(pin, /*lflag*/0);
++ goto out_dput; /* success */
++ }
++ au_unpin(pin);
++ goto out_unlock;
++
++ out_dgrade:
++ di_downgrade_lock(parent, AuLock_IR);
++ out_unlock:
++ di_read_unlock(parent, AuLock_IR);
++ out_dput:
++ dput(parent);
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_file_refresh_by_inode(struct file *file, int *need_reopen)
++{
++ int err;
++ aufs_bindex_t bstart;
++ struct au_pin pin;
++ struct au_finfo *finfo;
++ struct dentry *dentry, *parent, *hi_wh;
++ struct inode *inode;
++ struct super_block *sb;
++
++ FiMustWriteLock(file);
++
++ err = 0;
++ finfo = au_fi(file);
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ bstart = au_ibstart(inode);
++ if (bstart == finfo->fi_bstart)
++ goto out;
++
++ parent = dget_parent(dentry);
++ if (au_test_ro(sb, bstart, inode)) {
++ di_read_lock_parent(parent, !AuLock_IR);
++ err = AuWbrCopyup(au_sbi(sb), dentry);
++ bstart = err;
++ di_read_unlock(parent, !AuLock_IR);
++ if (unlikely(err < 0))
++ goto out_parent;
++ err = 0;
++ }
++
++ di_read_lock_parent(parent, AuLock_IR);
++ hi_wh = au_hi_wh(inode, bstart);
++ if (au_opt_test(au_mntflags(sb), PLINK)
++ && au_plink_test(inode)
++ && !d_unhashed(dentry)) {
++ err = au_test_and_cpup_dirs(dentry, bstart);
++ if (unlikely(err))
++ goto out_unlock;
++
++ /* always superio. */
++ err = au_pin(&pin, dentry, bstart, AuOpt_UDBA_NONE,
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ if (!err)
++ err = au_sio_cpup_simple(dentry, bstart, -1,
++ AuCpup_DTIME);
++ au_unpin(&pin);
++ } else if (hi_wh) {
++ /* already copied-up after unlink */
++ err = au_reopen_wh(file, bstart, hi_wh);
++ *need_reopen = 0;
++ }
++
++ out_unlock:
++ di_read_unlock(parent, AuLock_IR);
++ out_parent:
++ dput(parent);
++ out:
++ return err;
++}
++
++static void au_do_refresh_file(struct file *file)
++{
++ aufs_bindex_t bindex, bend, new_bindex, brid;
++ struct au_hfile *p, tmp, *q;
++ struct au_finfo *finfo;
++ struct super_block *sb;
++
++ FiMustWriteLock(file);
++
++ sb = file->f_dentry->d_sb;
++ finfo = au_fi(file);
++ p = finfo->fi_hfile + finfo->fi_bstart;
++ brid = p->hf_br->br_id;
++ bend = finfo->fi_bend;
++ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++, p++) {
++ if (!p->hf_file)
++ continue;
++
++ new_bindex = au_br_index(sb, p->hf_br->br_id);
++ if (new_bindex == bindex)
++ continue;
++ if (new_bindex < 0) {
++ au_set_h_fptr(file, bindex, NULL);
++ continue;
++ }
++
++ /* swap two lower inode, and loop again */
++ q = finfo->fi_hfile + new_bindex;
++ tmp = *q;
++ *q = *p;
++ *p = tmp;
++ if (tmp.hf_file) {
++ bindex--;
++ p--;
++ }
++ }
++
++ p = finfo->fi_hfile;
++ if (!au_test_mmapped(file) && !d_unhashed(file->f_dentry)) {
++ bend = au_sbend(sb);
++ for (finfo->fi_bstart = 0; finfo->fi_bstart <= bend;
++ finfo->fi_bstart++, p++)
++ if (p->hf_file) {
++ if (p->hf_file->f_dentry
++ && p->hf_file->f_dentry->d_inode)
++ break;
++ else
++ au_hfput(p, file);
++ }
++ } else {
++ bend = au_br_index(sb, brid);
++ for (finfo->fi_bstart = 0; finfo->fi_bstart < bend;
++ finfo->fi_bstart++, p++)
++ if (p->hf_file)
++ au_hfput(p, file);
++ bend = au_sbend(sb);
++ }
++
++ p = finfo->fi_hfile + bend;
++ for (finfo->fi_bend = bend; finfo->fi_bend >= finfo->fi_bstart;
++ finfo->fi_bend--, p--)
++ if (p->hf_file) {
++ if (p->hf_file->f_dentry
++ && p->hf_file->f_dentry->d_inode)
++ break;
++ else
++ au_hfput(p, file);
++ }
++ AuDebugOn(finfo->fi_bend < finfo->fi_bstart);
++}
++
++/*
++ * after branch manipulating, refresh the file.
++ */
++static int refresh_file(struct file *file, int (*reopen)(struct file *file))
++{
++ int err, need_reopen;
++ struct dentry *dentry;
++ aufs_bindex_t bend, bindex;
++
++ dentry = file->f_dentry;
++ err = au_fi_realloc(au_fi(file), au_sbend(dentry->d_sb) + 1);
++ if (unlikely(err))
++ goto out;
++ au_do_refresh_file(file);
++
++ err = 0;
++ need_reopen = 1;
++ if (!au_test_mmapped(file))
++ err = au_file_refresh_by_inode(file, &need_reopen);
++ if (!err && need_reopen && !d_unhashed(dentry))
++ err = reopen(file);
++ if (!err) {
++ au_update_figen(file);
++ return 0; /* success */
++ }
++
++ /* error, close all lower files */
++ bend = au_fbend(file);
++ for (bindex = au_fbstart(file); bindex <= bend; bindex++)
++ au_set_h_fptr(file, bindex, NULL);
++
++ out:
++ return err;
++}
++
++/* common function to regular file and dir */
++int au_reval_and_lock_fdi(struct file *file, int (*reopen)(struct file *file),
++ int wlock)
++{
++ int err;
++ unsigned int sigen, figen;
++ aufs_bindex_t bstart;
++ unsigned char pseudo_link;
++ struct dentry *dentry;
++
++ err = 0;
++ dentry = file->f_dentry;
++ sigen = au_sigen(dentry->d_sb);
++ fi_write_lock(file);
++ figen = au_figen(file);
++ di_write_lock_child(dentry);
++ bstart = au_dbstart(dentry);
++ pseudo_link = (bstart != au_ibstart(dentry->d_inode));
++ if (sigen == figen && !pseudo_link && au_fbstart(file) == bstart) {
++ if (!wlock) {
++ di_downgrade_lock(dentry, AuLock_IR);
++ fi_downgrade_lock(file);
++ }
++ goto out; /* success */
++ }
++
++ AuDbg("sigen %d, figen %d\n", sigen, figen);
++ if (sigen != au_digen(dentry)
++ || sigen != au_iigen(dentry->d_inode)) {
++ err = au_reval_dpath(dentry, sigen);
++ if (unlikely(err < 0))
++ goto out;
++ AuDebugOn(au_digen(dentry) != sigen
++ || au_iigen(dentry->d_inode) != sigen);
++ }
++
++ err = refresh_file(file, reopen);
++ if (!err) {
++ if (!wlock) {
++ di_downgrade_lock(dentry, AuLock_IR);
++ fi_downgrade_lock(file);
++ }
++ } else {
++ di_write_unlock(dentry);
++ fi_write_unlock(file);
++ }
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* cf. aufs_nopage() */
++/* for madvise(2) */
++static int aufs_readpage(struct file *file __maybe_unused, struct page *page)
++{
++ unlock_page(page);
++ return 0;
++}
++
++/* they will never be called. */
++#ifdef CONFIG_AUFS_DEBUG
++static int aufs_write_begin(struct file *file, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned flags,
++ struct page **pagep, void **fsdata)
++{ AuUnsupport(); return 0; }
++static int aufs_write_end(struct file *file, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned copied,
++ struct page *page, void *fsdata)
++{ AuUnsupport(); return 0; }
++static int aufs_writepage(struct page *page, struct writeback_control *wbc)
++{ AuUnsupport(); return 0; }
++static void aufs_sync_page(struct page *page)
++{ AuUnsupport(); }
++
++static int aufs_set_page_dirty(struct page *page)
++{ AuUnsupport(); return 0; }
++static void aufs_invalidatepage(struct page *page, unsigned long offset)
++{ AuUnsupport(); }
++static int aufs_releasepage(struct page *page, gfp_t gfp)
++{ AuUnsupport(); return 0; }
++static ssize_t aufs_direct_IO(int rw, struct kiocb *iocb,
++ const struct iovec *iov, loff_t offset,
++ unsigned long nr_segs)
++{ AuUnsupport(); return 0; }
++#endif /* CONFIG_AUFS_DEBUG */
++
++struct address_space_operations aufs_aop = {
++ .readpage = aufs_readpage,
++#ifdef CONFIG_AUFS_DEBUG
++ .writepage = aufs_writepage,
++ .sync_page = aufs_sync_page,
++ .set_page_dirty = aufs_set_page_dirty,
++ .write_begin = aufs_write_begin,
++ .write_end = aufs_write_end,
++ .invalidatepage = aufs_invalidatepage,
++ .releasepage = aufs_releasepage,
++ .direct_IO = aufs_direct_IO,
++#endif /* CONFIG_AUFS_DEBUG */
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/file.h linux-2.6.31.5/fs/aufs/file.h
+--- linux-2.6.31.5.orig/fs/aufs/file.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/file.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,175 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * file operations
++ */
++
++#ifndef __AUFS_FILE_H__
++#define __AUFS_FILE_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/poll.h>
++#include <linux/aufs_type.h>
++#include "rwsem.h"
++
++struct au_branch;
++struct au_hfile {
++ struct file *hf_file;
++ struct au_branch *hf_br;
++};
++
++struct au_vdir;
++struct au_finfo {
++ atomic_t fi_generation;
++
++ struct au_rwsem fi_rwsem;
++ struct au_hfile *fi_hfile;
++ aufs_bindex_t fi_bstart, fi_bend;
++
++ union {
++ /* non-dir only */
++ struct {
++ struct vm_operations_struct *fi_h_vm_ops;
++ struct vm_operations_struct *fi_vm_ops;
++ };
++
++ /* dir only */
++ struct {
++ struct au_vdir *fi_vdir_cache;
++ int fi_maintain_plink;
++ };
++ };
++};
++
++/* ---------------------------------------------------------------------- */
++
++/* file.c */
++extern struct address_space_operations aufs_aop;
++void au_store_oflag(struct nameidata *nd, struct inode *inode);
++unsigned int au_file_roflags(unsigned int flags);
++struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags,
++ struct file *file);
++int au_do_open(struct file *file, int (*open)(struct file *file, int flags));
++int au_reopen_nondir(struct file *file);
++struct au_pin;
++int au_ready_to_write(struct file *file, loff_t len, struct au_pin *pin);
++int au_reval_and_lock_fdi(struct file *file, int (*reopen)(struct file *file),
++ int wlock);
++
++/* poll.c */
++#ifdef CONFIG_AUFS_POLL
++unsigned int aufs_poll(struct file *file, poll_table *wait);
++#endif
++
++/* f_op.c */
++extern const struct file_operations aufs_file_fop;
++int aufs_flush(struct file *file, fl_owner_t id);
++
++/* finfo.c */
++void au_hfput(struct au_hfile *hf, struct file *file);
++void au_set_h_fptr(struct file *file, aufs_bindex_t bindex,
++ struct file *h_file);
++
++void au_update_figen(struct file *file);
++
++void au_finfo_fin(struct file *file);
++int au_finfo_init(struct file *file);
++int au_fi_realloc(struct au_finfo *finfo, int nbr);
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct au_finfo *au_fi(struct file *file)
++{
++ return file->private_data;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * fi_read_lock, fi_write_lock,
++ * fi_read_unlock, fi_write_unlock, fi_downgrade_lock
++ */
++AuSimpleRwsemFuncs(fi, struct file *f, &au_fi(f)->fi_rwsem);
++
++#define FiMustNoWaiters(f) AuRwMustNoWaiters(&au_fi(f)->fi_rwsem)
++#define FiMustAnyLock(f) AuRwMustAnyLock(&au_fi(f)->fi_rwsem)
++#define FiMustWriteLock(f) AuRwMustWriteLock(&au_fi(f)->fi_rwsem)
++
++/* ---------------------------------------------------------------------- */
++
++/* todo: hard/soft set? */
++static inline aufs_bindex_t au_fbstart(struct file *file)
++{
++ FiMustAnyLock(file);
++ return au_fi(file)->fi_bstart;
++}
++
++static inline aufs_bindex_t au_fbend(struct file *file)
++{
++ FiMustAnyLock(file);
++ return au_fi(file)->fi_bend;
++}
++
++static inline struct au_vdir *au_fvdir_cache(struct file *file)
++{
++ FiMustAnyLock(file);
++ return au_fi(file)->fi_vdir_cache;
++}
++
++static inline void au_set_fbstart(struct file *file, aufs_bindex_t bindex)
++{
++ FiMustWriteLock(file);
++ au_fi(file)->fi_bstart = bindex;
++}
++
++static inline void au_set_fbend(struct file *file, aufs_bindex_t bindex)
++{
++ FiMustWriteLock(file);
++ au_fi(file)->fi_bend = bindex;
++}
++
++static inline void au_set_fvdir_cache(struct file *file,
++ struct au_vdir *vdir_cache)
++{
++ FiMustWriteLock(file);
++ au_fi(file)->fi_vdir_cache = vdir_cache;
++}
++
++static inline struct file *au_h_fptr(struct file *file, aufs_bindex_t bindex)
++{
++ FiMustAnyLock(file);
++ return au_fi(file)->fi_hfile[0 + bindex].hf_file;
++}
++
++/* todo: memory barrier? */
++static inline unsigned int au_figen(struct file *f)
++{
++ return atomic_read(&au_fi(f)->fi_generation);
++}
++
++static inline int au_test_mmapped(struct file *f)
++{
++ FiMustAnyLock(f);
++ return !!(au_fi(f)->fi_h_vm_ops);
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_FILE_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/finfo.c linux-2.6.31.5/fs/aufs/finfo.c
+--- linux-2.6.31.5.orig/fs/aufs/finfo.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/finfo.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,133 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * file private data
++ */
++
++#include <linux/file.h>
++#include "aufs.h"
++
++void au_hfput(struct au_hfile *hf, struct file *file)
++{
++ if (file->f_mode & FMODE_EXEC)
++ allow_write_access(hf->hf_file);
++ fput(hf->hf_file);
++ hf->hf_file = NULL;
++ atomic_dec_return(&hf->hf_br->br_count);
++ hf->hf_br = NULL;
++}
++
++void au_set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *val)
++{
++ struct au_finfo *finfo = au_fi(file);
++ struct au_hfile *hf;
++
++ hf = finfo->fi_hfile + bindex;
++ if (hf->hf_file)
++ au_hfput(hf, file);
++ if (val) {
++ hf->hf_file = val;
++ hf->hf_br = au_sbr(file->f_dentry->d_sb, bindex);
++ }
++}
++
++void au_update_figen(struct file *file)
++{
++ atomic_set(&au_fi(file)->fi_generation, au_digen(file->f_dentry));
++ /* smp_mb(); */ /* atomic_set */
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_finfo_fin(struct file *file)
++{
++ struct au_finfo *finfo;
++ aufs_bindex_t bindex, bend;
++
++ fi_write_lock(file);
++ bend = au_fbend(file);
++ bindex = au_fbstart(file);
++ if (bindex >= 0)
++ /*
++ * calls fput() instead of filp_close(),
++ * since no dnotify or lock for the lower file.
++ */
++ for (; bindex <= bend; bindex++)
++ au_set_h_fptr(file, bindex, NULL);
++
++ finfo = au_fi(file);
++ au_dbg_verify_hf(finfo);
++ kfree(finfo->fi_hfile);
++ fi_write_unlock(file);
++ AuRwDestroy(&finfo->fi_rwsem);
++ au_cache_free_finfo(finfo);
++}
++
++int au_finfo_init(struct file *file)
++{
++ struct au_finfo *finfo;
++ struct dentry *dentry;
++ unsigned long ul;
++
++ dentry = file->f_dentry;
++ finfo = au_cache_alloc_finfo();
++ if (unlikely(!finfo))
++ goto out;
++
++ finfo->fi_hfile = kcalloc(au_sbend(dentry->d_sb) + 1,
++ sizeof(*finfo->fi_hfile), GFP_NOFS);
++ if (unlikely(!finfo->fi_hfile))
++ goto out_finfo;
++
++ au_rw_init_wlock(&finfo->fi_rwsem);
++ finfo->fi_bstart = -1;
++ finfo->fi_bend = -1;
++ atomic_set(&finfo->fi_generation, au_digen(dentry));
++ /* smp_mb(); */ /* atomic_set */
++
++ /* cf. au_store_oflag() */
++ /* suppress a warning in lp64 */
++ ul = (unsigned long)file->private_data;
++ file->f_mode |= (vfsub_uint_to_fmode(ul) & FMODE_EXEC);
++ file->private_data = finfo;
++ return 0; /* success */
++
++ out_finfo:
++ au_cache_free_finfo(finfo);
++ out:
++ return -ENOMEM;
++}
++
++int au_fi_realloc(struct au_finfo *finfo, int nbr)
++{
++ int err, sz;
++ struct au_hfile *hfp;
++
++ err = -ENOMEM;
++ sz = sizeof(*hfp) * (finfo->fi_bend + 1);
++ if (!sz)
++ sz = sizeof(*hfp);
++ hfp = au_kzrealloc(finfo->fi_hfile, sz, sizeof(*hfp) * nbr, GFP_NOFS);
++ if (hfp) {
++ finfo->fi_hfile = hfp;
++ err = 0;
++ }
++
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/f_op.c linux-2.6.31.5/fs/aufs/f_op.c
+--- linux-2.6.31.5.orig/fs/aufs/f_op.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/f_op.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,802 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * file and vm operations
++ */
++
++#include <linux/file.h>
++#include <linux/fs_stack.h>
++#include <linux/mm.h>
++#include <linux/security.h>
++#include "aufs.h"
++
++/* common function to regular file and dir */
++int aufs_flush(struct file *file, fl_owner_t id)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ struct dentry *dentry;
++ struct file *h_file;
++
++ dentry = file->f_dentry;
++ si_noflush_read_lock(dentry->d_sb);
++ fi_read_lock(file);
++ di_read_lock_child(dentry, AuLock_IW);
++
++ err = 0;
++ bend = au_fbend(file);
++ for (bindex = au_fbstart(file); !err && bindex <= bend; bindex++) {
++ h_file = au_h_fptr(file, bindex);
++ if (!h_file || !h_file->f_op || !h_file->f_op->flush)
++ continue;
++
++ err = h_file->f_op->flush(h_file, id);
++ if (!err)
++ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL);
++ /*ignore*/
++ }
++ au_cpup_attr_timesizes(dentry->d_inode);
++
++ di_read_unlock(dentry, AuLock_IW);
++ fi_read_unlock(file);
++ si_read_unlock(dentry->d_sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int do_open_nondir(struct file *file, int flags)
++{
++ int err;
++ aufs_bindex_t bindex;
++ struct file *h_file;
++ struct dentry *dentry;
++ struct au_finfo *finfo;
++
++ FiMustWriteLock(file);
++
++ err = 0;
++ dentry = file->f_dentry;
++ finfo = au_fi(file);
++ finfo->fi_h_vm_ops = NULL;
++ finfo->fi_vm_ops = NULL;
++ bindex = au_dbstart(dentry);
++ /* O_TRUNC is processed already */
++ BUG_ON(au_test_ro(dentry->d_sb, bindex, dentry->d_inode)
++ && (flags & O_TRUNC));
++
++ h_file = au_h_open(dentry, bindex, flags, file);
++ if (IS_ERR(h_file))
++ err = PTR_ERR(h_file);
++ else {
++ au_set_fbstart(file, bindex);
++ au_set_fbend(file, bindex);
++ au_set_h_fptr(file, bindex, h_file);
++ au_update_figen(file);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ }
++ return err;
++}
++
++static int aufs_open_nondir(struct inode *inode __maybe_unused,
++ struct file *file)
++{
++ return au_do_open(file, do_open_nondir);
++}
++
++static int aufs_release_nondir(struct inode *inode __maybe_unused,
++ struct file *file)
++{
++ struct super_block *sb = file->f_dentry->d_sb;
++
++ si_noflush_read_lock(sb);
++ kfree(au_fi(file)->fi_vm_ops);
++ au_finfo_fin(file);
++ si_read_unlock(sb);
++ return 0;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos)
++{
++ ssize_t err;
++ struct dentry *dentry;
++ struct file *h_file;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (unlikely(err))
++ goto out;
++
++ h_file = au_h_fptr(file, au_fbstart(file));
++ err = vfsub_read_u(h_file, buf, count, ppos);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode);
++
++ di_read_unlock(dentry, AuLock_IR);
++ fi_read_unlock(file);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++static ssize_t aufs_write(struct file *file, const char __user *ubuf,
++ size_t count, loff_t *ppos)
++{
++ ssize_t err;
++ aufs_bindex_t bstart;
++ struct au_pin pin;
++ struct dentry *dentry;
++ struct inode *inode;
++ struct super_block *sb;
++ struct file *h_file;
++ char __user *buf = (char __user *)ubuf;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ mutex_lock(&inode->i_mutex);
++ si_read_lock(sb, AuLock_FLUSH);
++
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++
++ bstart = au_fbstart(file);
++ h_file = au_h_fptr(file, bstart);
++ au_unpin(&pin);
++ err = vfsub_write_u(h_file, buf, count, ppos);
++ au_cpup_attr_timesizes(inode);
++ inode->i_mode = h_file->f_dentry->d_inode->i_mode;
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ mutex_unlock(&inode->i_mutex);
++ return err;
++}
++
++static ssize_t aufs_aio_read(struct kiocb *kio, const struct iovec *iov,
++ unsigned long nv, loff_t pos)
++{
++ ssize_t err;
++ struct file *file, *h_file;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ file = kio->ki_filp;
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (unlikely(err))
++ goto out;
++
++ err = -ENOSYS;
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (h_file->f_op && h_file->f_op->aio_read) {
++ err = security_file_permission(h_file, MAY_READ);
++ if (unlikely(err))
++ goto out_unlock;
++ if (!is_sync_kiocb(kio)) {
++ get_file(h_file);
++ fput(file);
++ }
++ kio->ki_filp = h_file;
++ err = h_file->f_op->aio_read(kio, iov, nv, pos);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ fsstack_copy_attr_atime(dentry->d_inode,
++ h_file->f_dentry->d_inode);
++ } else
++ /* currently there is no such fs */
++ WARN_ON_ONCE(h_file->f_op && h_file->f_op->read);
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_read_unlock(file);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++static ssize_t aufs_aio_write(struct kiocb *kio, const struct iovec *iov,
++ unsigned long nv, loff_t pos)
++{
++ ssize_t err;
++ aufs_bindex_t bstart;
++ struct au_pin pin;
++ struct dentry *dentry;
++ struct inode *inode;
++ struct super_block *sb;
++ struct file *file, *h_file;
++
++ file = kio->ki_filp;
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ mutex_lock(&inode->i_mutex);
++ si_read_lock(sb, AuLock_FLUSH);
++
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++
++ err = -ENOSYS;
++ bstart = au_fbstart(file);
++ h_file = au_h_fptr(file, bstart);
++ au_unpin(&pin);
++ if (h_file->f_op && h_file->f_op->aio_write) {
++ err = security_file_permission(h_file, MAY_WRITE);
++ if (unlikely(err))
++ goto out_unlock;
++ if (!is_sync_kiocb(kio)) {
++ get_file(h_file);
++ fput(file);
++ }
++ kio->ki_filp = h_file;
++ err = h_file->f_op->aio_write(kio, iov, nv, pos);
++ au_cpup_attr_timesizes(inode);
++ inode->i_mode = h_file->f_dentry->d_inode->i_mode;
++ } else
++ /* currently there is no such fs */
++ WARN_ON_ONCE(h_file->f_op && h_file->f_op->write);
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ mutex_unlock(&inode->i_mutex);
++ return err;
++}
++
++static ssize_t aufs_splice_read(struct file *file, loff_t *ppos,
++ struct pipe_inode_info *pipe, size_t len,
++ unsigned int flags)
++{
++ ssize_t err;
++ struct file *h_file;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (unlikely(err))
++ goto out;
++
++ err = -EINVAL;
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (au_test_loopback_kthread()) {
++ file->f_mapping = h_file->f_mapping;
++ smp_mb(); /* unnecessary? */
++ }
++ err = vfsub_splice_to(h_file, ppos, pipe, len, flags);
++ /* todo: necessasry? */
++ /* file->f_ra = h_file->f_ra; */
++ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode);
++
++ di_read_unlock(dentry, AuLock_IR);
++ fi_read_unlock(file);
++
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++static ssize_t
++aufs_splice_write(struct pipe_inode_info *pipe, struct file *file, loff_t *ppos,
++ size_t len, unsigned int flags)
++{
++ ssize_t err;
++ struct au_pin pin;
++ struct dentry *dentry;
++ struct inode *inode;
++ struct super_block *sb;
++ struct file *h_file;
++
++ dentry = file->f_dentry;
++ inode = dentry->d_inode;
++ mutex_lock(&inode->i_mutex);
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++
++ h_file = au_h_fptr(file, au_fbstart(file));
++ au_unpin(&pin);
++ err = vfsub_splice_from(pipe, h_file, ppos, len, flags);
++ au_cpup_attr_timesizes(inode);
++ inode->i_mode = h_file->f_dentry->d_inode->i_mode;
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ mutex_unlock(&inode->i_mutex);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct file *au_safe_file(struct vm_area_struct *vma)
++{
++ struct file *file;
++
++ file = vma->vm_file;
++ if (file->private_data && au_test_aufs(file->f_dentry->d_sb))
++ return file;
++ return NULL;
++}
++
++static void au_reset_file(struct vm_area_struct *vma, struct file *file)
++{
++ vma->vm_file = file;
++ /* smp_mb(); */ /* flush vm_file */
++}
++
++static int aufs_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
++{
++ int err;
++ static DECLARE_WAIT_QUEUE_HEAD(wq);
++ struct file *file, *h_file;
++ struct au_finfo *finfo;
++
++ /* todo: non-robr mode, user vm_file as it is? */
++ wait_event(wq, (file = au_safe_file(vma)));
++
++ /* do not revalidate, no si lock */
++ finfo = au_fi(file);
++ h_file = finfo->fi_hfile[0 + finfo->fi_bstart].hf_file;
++ AuDebugOn(!h_file || !finfo->fi_h_vm_ops);
++
++ fi_write_lock(file);
++ vma->vm_file = h_file;
++ err = finfo->fi_h_vm_ops->fault(vma, vmf);
++ /* todo: necessary? */
++ /* file->f_ra = h_file->f_ra; */
++ au_reset_file(vma, file);
++ fi_write_unlock(file);
++#if 0 /* def CONFIG_SMP */
++ /* wake_up_nr(&wq, online_cpu - 1); */
++ wake_up_all(&wq);
++#else
++ wake_up(&wq);
++#endif
++
++ return err;
++}
++
++static int aufs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
++{
++ int err;
++ static DECLARE_WAIT_QUEUE_HEAD(wq);
++ struct file *file, *h_file;
++ struct au_finfo *finfo;
++
++ wait_event(wq, (file = au_safe_file(vma)));
++
++ finfo = au_fi(file);
++ h_file = finfo->fi_hfile[0 + finfo->fi_bstart].hf_file;
++ AuDebugOn(!h_file || !finfo->fi_h_vm_ops);
++
++ fi_write_lock(file);
++ vma->vm_file = h_file;
++ err = finfo->fi_h_vm_ops->page_mkwrite(vma, vmf);
++ au_reset_file(vma, file);
++ fi_write_unlock(file);
++ wake_up(&wq);
++
++ return err;
++}
++
++static void aufs_vm_close(struct vm_area_struct *vma)
++{
++ static DECLARE_WAIT_QUEUE_HEAD(wq);
++ struct file *file, *h_file;
++ struct au_finfo *finfo;
++
++ wait_event(wq, (file = au_safe_file(vma)));
++
++ finfo = au_fi(file);
++ h_file = finfo->fi_hfile[0 + finfo->fi_bstart].hf_file;
++ AuDebugOn(!h_file || !finfo->fi_h_vm_ops);
++
++ fi_write_lock(file);
++ vma->vm_file = h_file;
++ finfo->fi_h_vm_ops->close(vma);
++ au_reset_file(vma, file);
++ fi_write_unlock(file);
++ wake_up(&wq);
++}
++
++static struct vm_operations_struct aufs_vm_ops = {
++ /* .close and .page_mkwrite are not set by default */
++ .fault = aufs_fault,
++};
++
++/* ---------------------------------------------------------------------- */
++
++static struct vm_operations_struct *au_vm_ops(struct file *h_file,
++ struct vm_area_struct *vma)
++{
++ struct vm_operations_struct *vm_ops;
++ int err;
++
++ vm_ops = ERR_PTR(-ENODEV);
++ if (!h_file->f_op || !h_file->f_op->mmap)
++ goto out;
++
++ err = h_file->f_op->mmap(h_file, vma);
++ vm_ops = ERR_PTR(err);
++ if (unlikely(err))
++ goto out;
++
++ vm_ops = vma->vm_ops;
++ err = do_munmap(current->mm, vma->vm_start,
++ vma->vm_end - vma->vm_start);
++ if (unlikely(err)) {
++ AuIOErr("failed internal unmapping %.*s, %d\n",
++ AuDLNPair(h_file->f_dentry), err);
++ vm_ops = ERR_PTR(-EIO);
++ }
++
++ out:
++ return vm_ops;
++}
++
++static int au_custom_vm_ops(struct au_finfo *finfo, struct vm_area_struct *vma)
++{
++ int err;
++ struct vm_operations_struct *h_ops;
++
++ AuRwMustAnyLock(&finfo->fi_rwsem);
++
++ err = 0;
++ h_ops = finfo->fi_h_vm_ops;
++ AuDebugOn(!h_ops);
++ if ((!h_ops->page_mkwrite && !h_ops->close)
++ || finfo->fi_vm_ops)
++ goto out;
++
++ err = -ENOMEM;
++ finfo->fi_vm_ops = kmemdup(&aufs_vm_ops, sizeof(aufs_vm_ops), GFP_NOFS);
++ if (unlikely(!finfo->fi_vm_ops))
++ goto out;
++
++ err = 0;
++ if (h_ops->page_mkwrite)
++ finfo->fi_vm_ops->page_mkwrite = aufs_page_mkwrite;
++ if (h_ops->close)
++ finfo->fi_vm_ops->close = aufs_vm_close;
++
++ vma->vm_ops = finfo->fi_vm_ops;
++
++ out:
++ return err;
++}
++
++static int aufs_mmap(struct file *file, struct vm_area_struct *vma)
++{
++ int err;
++ unsigned char wlock, mmapped;
++ struct dentry *dentry;
++ struct super_block *sb;
++ struct file *h_file;
++ struct vm_operations_struct *vm_ops;
++
++ dentry = file->f_dentry;
++ wlock = !!(file->f_mode & FMODE_WRITE) && (vma->vm_flags & VM_SHARED);
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ mmapped = !!au_test_mmapped(file);
++ if (wlock) {
++ struct au_pin pin;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++ au_unpin(&pin);
++ } else
++ di_downgrade_lock(dentry, AuLock_IR);
++
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (!mmapped && au_test_fs_bad_mapping(h_file->f_dentry->d_sb)) {
++ /*
++ * by this assignment, f_mapping will differs from aufs inode
++ * i_mapping.
++ * if someone else mixes the use of f_dentry->d_inode and
++ * f_mapping->host, then a problem may arise.
++ */
++ file->f_mapping = h_file->f_mapping;
++ }
++
++ vm_ops = NULL;
++ if (!mmapped) {
++ vm_ops = au_vm_ops(h_file, vma);
++ err = PTR_ERR(vm_ops);
++ if (IS_ERR(vm_ops))
++ goto out_unlock;
++ }
++
++ /*
++ * unnecessary to handle MAP_DENYWRITE and deny_write_access()?
++ * currently MAP_DENYWRITE from userspace is ignored, but elf loader
++ * sets it. when FMODE_EXEC is set (by open_exec() or sys_uselib()),
++ * both of the aufs file and the lower file is deny_write_access()-ed.
++ * finally I hope we can skip handlling MAP_DENYWRITE here.
++ */
++ err = generic_file_mmap(file, vma);
++ if (unlikely(err))
++ goto out_unlock;
++
++ vma->vm_ops = &aufs_vm_ops;
++ /* test again */
++ if (!au_test_mmapped(file))
++ au_fi(file)->fi_h_vm_ops = vm_ops;
++
++ err = au_custom_vm_ops(au_fi(file), vma);
++ if (unlikely(err))
++ goto out_unlock;
++
++ vfsub_file_accessed(h_file);
++ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode);
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int aufs_fsync_nondir(struct file *file, struct dentry *dentry,
++ int datasync)
++{
++ int err;
++ struct au_pin pin;
++ struct inode *inode;
++ struct file *h_file;
++ struct super_block *sb;
++
++ inode = dentry->d_inode;
++ IMustLock(file->f_mapping->host);
++ if (inode != file->f_mapping->host) {
++ mutex_unlock(&file->f_mapping->host->i_mutex);
++ mutex_lock(&inode->i_mutex);
++ }
++ IMustLock(inode);
++
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++
++ err = 0; /* -EBADF; */ /* posix? */
++ if (unlikely(!(file->f_mode & FMODE_WRITE)))
++ goto out;
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++ au_unpin(&pin);
++
++ err = -EINVAL;
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (h_file->f_op && h_file->f_op->fsync) {
++ struct dentry *h_d;
++ struct mutex *h_mtx;
++
++ /*
++ * no filemap_fdatawrite() since aufs file has no its own
++ * mapping, but dir.
++ */
++ h_d = h_file->f_dentry;
++ h_mtx = &h_d->d_inode->i_mutex;
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ err = h_file->f_op->fsync(h_file, h_d, datasync);
++ if (!err)
++ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL);
++ /*ignore*/
++ au_cpup_attr_timesizes(inode);
++ mutex_unlock(h_mtx);
++ }
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ if (inode != file->f_mapping->host) {
++ mutex_unlock(&inode->i_mutex);
++ mutex_lock(&file->f_mapping->host->i_mutex);
++ }
++ return err;
++}
++
++/* no one supports this operation, currently */
++#if 0
++static int aufs_aio_fsync_nondir(struct kiocb *kio, int datasync)
++{
++ int err;
++ struct au_pin pin;
++ struct dentry *dentry;
++ struct inode *inode;
++ struct file *file, *h_file;
++ struct super_block *sb;
++
++ file = kio->ki_filp;
++ dentry = file->f_dentry;
++ inode = dentry->d_inode;
++ mutex_lock(&inode->i_mutex);
++
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++
++ err = 0; /* -EBADF; */ /* posix? */
++ if (unlikely(!(file->f_mode & FMODE_WRITE)))
++ goto out;
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ if (unlikely(err))
++ goto out;
++
++ err = au_ready_to_write(file, -1, &pin);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ goto out_unlock;
++ au_unpin(&pin);
++
++ err = -ENOSYS;
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (h_file->f_op && h_file->f_op->aio_fsync) {
++ struct dentry *h_d;
++ struct mutex *h_mtx;
++
++ h_d = h_file->f_dentry;
++ h_mtx = &h_d->d_inode->i_mutex;
++ if (!is_sync_kiocb(kio)) {
++ get_file(h_file);
++ fput(file);
++ }
++ kio->ki_filp = h_file;
++ err = h_file->f_op->aio_fsync(kio, datasync);
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ if (!err)
++ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL);
++ /*ignore*/
++ au_cpup_attr_timesizes(inode);
++ mutex_unlock(h_mtx);
++ }
++
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ fi_write_unlock(file);
++ out:
++ si_read_unlock(sb);
++ mutex_unlock(&inode->i_mutex);
++ return err;
++}
++#endif
++
++static int aufs_fasync(int fd, struct file *file, int flag)
++{
++ int err;
++ struct file *h_file;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (unlikely(err))
++ goto out;
++
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (h_file->f_op && h_file->f_op->fasync)
++ err = h_file->f_op->fasync(fd, h_file, flag);
++
++ di_read_unlock(dentry, AuLock_IR);
++ fi_read_unlock(file);
++
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* no one supports this operation, currently */
++#if 0
++static ssize_t aufs_sendpage(struct file *file, struct page *page, int offset,
++ size_t len, loff_t *pos , int more)
++{
++}
++#endif
++
++/* ---------------------------------------------------------------------- */
++
++const struct file_operations aufs_file_fop = {
++ /*
++ * while generic_file_llseek/_unlocked() don't use BKL,
++ * don't use it since it operates file->f_mapping->host.
++ * in aufs, it may be a real file and may confuse users by UDBA.
++ */
++ /* .llseek = generic_file_llseek, */
++
++ .read = aufs_read,
++ .write = aufs_write,
++ .aio_read = aufs_aio_read,
++ .aio_write = aufs_aio_write,
++#ifdef CONFIG_AUFS_POLL
++ .poll = aufs_poll,
++#endif
++ .mmap = aufs_mmap,
++ .open = aufs_open_nondir,
++ .flush = aufs_flush,
++ .release = aufs_release_nondir,
++ .fsync = aufs_fsync_nondir,
++ /* .aio_fsync = aufs_aio_fsync_nondir, */
++ .fasync = aufs_fasync,
++ /* .sendpage = aufs_sendpage, */
++ .splice_write = aufs_splice_write,
++ .splice_read = aufs_splice_read,
++#if 0
++ .aio_splice_write = aufs_aio_splice_write,
++ .aio_splice_read = aufs_aio_splice_read
++#endif
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/fstype.h linux-2.6.31.5/fs/aufs/fstype.h
+--- linux-2.6.31.5.orig/fs/aufs/fstype.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/fstype.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,474 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * judging filesystem type
++ */
++
++#ifndef __AUFS_FSTYPE_H__
++#define __AUFS_FSTYPE_H__
++
++#ifdef __KERNEL__
++
++#include <linux/cramfs_fs.h>
++#include <linux/fs.h>
++#include <linux/magic.h>
++#include <linux/romfs_fs.h>
++#include <linux/aufs_type.h>
++
++static inline int au_test_aufs(struct super_block *sb)
++{
++ return sb->s_magic == AUFS_SUPER_MAGIC;
++}
++
++static inline const char *au_sbtype(struct super_block *sb)
++{
++ return sb->s_type->name;
++}
++
++static inline int au_test_iso9660(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_ROMFS_FS) || defined(CONFIG_ROMFS_FS_MODULE)
++ return sb->s_magic == ROMFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_romfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE)
++ return sb->s_magic == ISOFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_cramfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_CRAMFS) || defined(CONFIG_CRAMFS_MODULE)
++ return sb->s_magic == CRAMFS_MAGIC;
++#endif
++ return 0;
++}
++
++static inline int au_test_nfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_NFS_FS) || defined(CONFIG_NFS_FS_MODULE)
++ return sb->s_magic == NFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_fuse(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_FUSE_FS) || defined(CONFIG_FUSE_FS_MODULE)
++ return sb->s_magic == FUSE_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_xfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_XFS_FS) || defined(CONFIG_XFS_FS_MODULE)
++ return sb->s_magic == XFS_SB_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_tmpfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_TMPFS
++ return sb->s_magic == TMPFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ecryptfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_ECRYPT_FS) || defined(CONFIG_ECRYPT_FS_MODULE)
++ return !strcmp(au_sbtype(sb), "ecryptfs");
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_smbfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_SMB_FS) || defined(CONFIG_SMB_FS_MODULE)
++ return sb->s_magic == SMB_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ocfs2(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_OCFS2_FS) || defined(CONFIG_OCFS2_FS_MODULE)
++ return sb->s_magic == OCFS2_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ocfs2_dlmfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_OCFS2_FS_O2CB) || defined(CONFIG_OCFS2_FS_O2CB_MODULE)
++ return sb->s_magic == DLMFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_coda(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_CODA_FS) || defined(CONFIG_CODA_FS_MODULE)
++ return sb->s_magic == CODA_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_v9fs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_9P_FS) || defined(CONFIG_9P_FS_MODULE)
++ return sb->s_magic == V9FS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ext4(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_EXT4DEV_FS) || defined(CONFIG_EXT4DEV_FS_MODULE)
++ return sb->s_magic == EXT4_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_sysv(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_SYSV_FS) || defined(CONFIG_SYSV_FS_MODULE)
++ return !strcmp(au_sbtype(sb), "sysv");
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ramfs(struct super_block *sb)
++{
++ return sb->s_magic == RAMFS_MAGIC;
++}
++
++static inline int au_test_ubifs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_UBIFS_FS) || defined(CONFIG_UBIFS_FS_MODULE)
++ return sb->s_magic == UBIFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_procfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_PROC_FS
++ return sb->s_magic == PROC_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_sysfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_SYSFS
++ return sb->s_magic == SYSFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_configfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_CONFIGFS_FS) || defined(CONFIG_CONFIGFS_FS_MODULE)
++ return sb->s_magic == CONFIGFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_minix(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_MINIX_FS) || defined(CONFIG_MINIX_FS_MODULE)
++ return sb->s_magic == MINIX3_SUPER_MAGIC
++ || sb->s_magic == MINIX2_SUPER_MAGIC
++ || sb->s_magic == MINIX2_SUPER_MAGIC2
++ || sb->s_magic == MINIX_SUPER_MAGIC
++ || sb->s_magic == MINIX_SUPER_MAGIC2;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_cifs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_CIFS_FS) || defined(CONFIGCIFS_FS_MODULE)
++ return sb->s_magic == CIFS_MAGIC_NUMBER;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_fat(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_FAT_FS) || defined(CONFIG_FAT_FS_MODULE)
++ return sb->s_magic == MSDOS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_msdos(struct super_block *sb)
++{
++ return au_test_fat(sb);
++}
++
++static inline int au_test_vfat(struct super_block *sb)
++{
++ return au_test_fat(sb);
++}
++
++static inline int au_test_securityfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_SECURITYFS
++ return sb->s_magic == SECURITYFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_squashfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_SQUASHFS) || defined(CONFIG_SQUASHFS_MODULE)
++ return sb->s_magic == SQUASHFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_btrfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_BTRFS_FS) || defined(CONFIG_BTRFS_FS_MODULE)
++ return sb->s_magic == BTRFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_xenfs(struct super_block *sb __maybe_unused)
++{
++#if defined(CONFIG_XENFS) || defined(CONFIG_XENFS_MODULE)
++ return sb->s_magic == XENFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_debugfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_DEBUG_FS
++ return sb->s_magic == DEBUGFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * they can't be an aufs branch.
++ */
++static inline int au_test_fs_unsuppoted(struct super_block *sb)
++{
++ return
++#ifndef CONFIG_AUFS_BR_RAMFS
++ au_test_ramfs(sb) ||
++#endif
++ au_test_procfs(sb)
++ || au_test_sysfs(sb)
++ || au_test_configfs(sb)
++ || au_test_debugfs(sb)
++ || au_test_securityfs(sb)
++ || au_test_xenfs(sb)
++ /* || !strcmp(au_sbtype(sb), "unionfs") */
++ || au_test_aufs(sb); /* will be supported in next version */
++}
++
++/*
++ * If the filesystem supports NFS-export, then it has to support NULL as
++ * a nameidata parameter for ->create(), ->lookup() and ->d_revalidate().
++ * We can apply this principle when we handle a lower filesystem.
++ */
++static inline int au_test_fs_null_nd(struct super_block *sb)
++{
++ return !!sb->s_export_op;
++}
++
++static inline int au_test_fs_remote(struct super_block *sb)
++{
++ return !au_test_tmpfs(sb)
++#ifdef CONFIG_AUFS_BR_RAMFS
++ && !au_test_ramfs(sb)
++#endif
++ && !(sb->s_type->fs_flags & FS_REQUIRES_DEV);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * Note: these functions (below) are created after reading ->getattr() in all
++ * filesystems under linux/fs. it means we have to do so in every update...
++ */
++
++/*
++ * some filesystems require getattr to refresh the inode attributes before
++ * referencing.
++ * in most cases, we can rely on the inode attribute in NFS (or every remote fs)
++ * and leave the work for d_revalidate()
++ */
++static inline int au_test_fs_refresh_iattr(struct super_block *sb)
++{
++ return au_test_nfs(sb)
++ || au_test_fuse(sb)
++ /* || au_test_smbfs(sb) */ /* untested */
++ /* || au_test_ocfs2(sb) */ /* untested */
++ /* || au_test_btrfs(sb) */ /* untested */
++ /* || au_test_coda(sb) */ /* untested */
++ /* || au_test_v9fs(sb) */ /* untested */
++ ;
++}
++
++/*
++ * filesystems which don't maintain i_size or i_blocks.
++ */
++static inline int au_test_fs_bad_iattr_size(struct super_block *sb)
++{
++ return au_test_xfs(sb)
++ /* || au_test_ext4(sb) */ /* untested */
++ /* || au_test_ocfs2(sb) */ /* untested */
++ /* || au_test_ocfs2_dlmfs(sb) */ /* untested */
++ /* || au_test_sysv(sb) */ /* untested */
++ /* || au_test_ubifs(sb) */ /* untested */
++ /* || au_test_minix(sb) */ /* untested */
++ ;
++}
++
++/*
++ * filesystems which don't store the correct value in some of their inode
++ * attributes.
++ */
++static inline int au_test_fs_bad_iattr(struct super_block *sb)
++{
++ return au_test_fs_bad_iattr_size(sb)
++ /* || au_test_cifs(sb) */ /* untested */
++ || au_test_fat(sb)
++ || au_test_msdos(sb)
++ || au_test_vfat(sb);
++}
++
++/* they don't check i_nlink in link(2) */
++static inline int au_test_fs_no_limit_nlink(struct super_block *sb)
++{
++ return au_test_tmpfs(sb)
++#ifdef CONFIG_AUFS_BR_RAMFS
++ || au_test_ramfs(sb)
++#endif
++ || au_test_ubifs(sb);
++}
++
++/*
++ * filesystems which sets S_NOATIME and S_NOCMTIME.
++ */
++static inline int au_test_fs_notime(struct super_block *sb)
++{
++ return au_test_nfs(sb)
++ || au_test_fuse(sb)
++ || au_test_ubifs(sb)
++ /* || au_test_cifs(sb) */ /* untested */
++ ;
++}
++
++/*
++ * filesystems which requires replacing i_mapping.
++ */
++static inline int au_test_fs_bad_mapping(struct super_block *sb)
++{
++ return au_test_fuse(sb)
++ || au_test_ubifs(sb);
++}
++
++/* temporary support for i#1 in cramfs */
++static inline int au_test_fs_unique_ino(struct inode *inode)
++{
++ if (au_test_cramfs(inode->i_sb))
++ return inode->i_ino != 1;
++ return 1;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * the filesystem where the xino files placed must support i/o after unlink and
++ * maintain i_size and i_blocks.
++ */
++static inline int au_test_fs_bad_xino(struct super_block *sb)
++{
++ return au_test_fs_remote(sb)
++ || au_test_fs_bad_iattr_size(sb)
++#ifdef CONFIG_AUFS_BR_RAMFS
++ || !(au_test_ramfs(sb) || au_test_fs_null_nd(sb))
++#else
++ || !au_test_fs_null_nd(sb) /* to keep xino code simple */
++#endif
++ /* don't want unnecessary work for xino */
++ || au_test_aufs(sb)
++ || au_test_ecryptfs(sb);
++}
++
++static inline int au_test_fs_trunc_xino(struct super_block *sb)
++{
++ return au_test_tmpfs(sb)
++ || au_test_ramfs(sb);
++}
++
++/*
++ * test if the @sb is real-readonly.
++ */
++static inline int au_test_fs_rr(struct super_block *sb)
++{
++ return au_test_squashfs(sb)
++ || au_test_iso9660(sb)
++ || au_test_cramfs(sb)
++ || au_test_romfs(sb);
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_FSTYPE_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/hinotify.c linux-2.6.31.5/fs/aufs/hinotify.c
+--- linux-2.6.31.5.orig/fs/aufs/hinotify.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/hinotify.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,755 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inotify for the lower directories
++ */
++
++#include "aufs.h"
++
++static const __u32 AuHinMask = (IN_MOVE | IN_DELETE | IN_CREATE);
++static struct inotify_handle *au_hin_handle;
++
++AuCacheFuncs(hinotify, HINOTIFY);
++
++int au_hin_alloc(struct au_hinode *hinode, struct inode *inode,
++ struct inode *h_inode)
++{
++ int err;
++ struct au_hinotify *hin;
++ s32 wd;
++
++ err = -ENOMEM;
++ hin = au_cache_alloc_hinotify();
++ if (hin) {
++ AuDebugOn(hinode->hi_notify);
++ hinode->hi_notify = hin;
++ hin->hin_aufs_inode = inode;
++
++ inotify_init_watch(&hin->hin_watch);
++ wd = inotify_add_watch(au_hin_handle, &hin->hin_watch, h_inode,
++ AuHinMask);
++ if (wd >= 0)
++ return 0; /* success */
++
++ err = wd;
++ put_inotify_watch(&hin->hin_watch);
++ au_cache_free_hinotify(hin);
++ hinode->hi_notify = NULL;
++ }
++
++ return err;
++}
++
++void au_hin_free(struct au_hinode *hinode)
++{
++ int err;
++ struct au_hinotify *hin;
++
++ hin = hinode->hi_notify;
++ if (hin) {
++ err = 0;
++ if (atomic_read(&hin->hin_watch.count))
++ err = inotify_rm_watch(au_hin_handle, &hin->hin_watch);
++ if (unlikely(err))
++ /* it means the watch is already removed */
++ AuWarn("failed inotify_rm_watch() %d\n", err);
++ au_cache_free_hinotify(hin);
++ hinode->hi_notify = NULL;
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_hin_ctl(struct au_hinode *hinode, int do_set)
++{
++ struct inode *h_inode;
++ struct inotify_watch *watch;
++
++ if (!hinode->hi_notify)
++ return;
++
++ h_inode = hinode->hi_inode;
++ IMustLock(h_inode);
++
++ /* todo: try inotify_find_update_watch()? */
++ watch = &hinode->hi_notify->hin_watch;
++ mutex_lock(&h_inode->inotify_mutex);
++ /* mutex_lock(&watch->ih->mutex); */
++ if (do_set) {
++ AuDebugOn(watch->mask & AuHinMask);
++ watch->mask |= AuHinMask;
++ } else {
++ AuDebugOn(!(watch->mask & AuHinMask));
++ watch->mask &= ~AuHinMask;
++ }
++ /* mutex_unlock(&watch->ih->mutex); */
++ mutex_unlock(&h_inode->inotify_mutex);
++}
++
++void au_reset_hinotify(struct inode *inode, unsigned int flags)
++{
++ aufs_bindex_t bindex, bend;
++ struct inode *hi;
++ struct dentry *iwhdentry;
++
++ bend = au_ibend(inode);
++ for (bindex = au_ibstart(inode); bindex <= bend; bindex++) {
++ hi = au_h_iptr(inode, bindex);
++ if (!hi)
++ continue;
++
++ /* mutex_lock_nested(&hi->i_mutex, AuLsc_I_CHILD); */
++ iwhdentry = au_hi_wh(inode, bindex);
++ if (iwhdentry)
++ dget(iwhdentry);
++ au_igrab(hi);
++ au_set_h_iptr(inode, bindex, NULL, 0);
++ au_set_h_iptr(inode, bindex, au_igrab(hi),
++ flags & ~AuHi_XINO);
++ iput(hi);
++ dput(iwhdentry);
++ /* mutex_unlock(&hi->i_mutex); */
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int hin_xino(struct inode *inode, struct inode *h_inode)
++{
++ int err;
++ aufs_bindex_t bindex, bend, bfound, bstart;
++ struct inode *h_i;
++
++ err = 0;
++ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) {
++ AuWarn("branch root dir was changed\n");
++ goto out;
++ }
++
++ bfound = -1;
++ bend = au_ibend(inode);
++ bstart = au_ibstart(inode);
++#if 0 /* reserved for future use */
++ if (bindex == bend) {
++ /* keep this ino in rename case */
++ goto out;
++ }
++#endif
++ for (bindex = bstart; bindex <= bend; bindex++) {
++ if (au_h_iptr(inode, bindex) == h_inode) {
++ bfound = bindex;
++ break;
++ }
++ }
++ if (bfound < 0)
++ goto out;
++
++ for (bindex = bstart; bindex <= bend; bindex++) {
++ h_i = au_h_iptr(inode, bindex);
++ if (!h_i)
++ continue;
++
++ err = au_xino_write(inode->i_sb, bindex, h_i->i_ino, /*ino*/0);
++ /* ignore this error */
++ /* bad action? */
++ }
++
++ /* children inode number will be broken */
++
++ out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int hin_gen_tree(struct dentry *dentry)
++{
++ int err, i, j, ndentry;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++ struct dentry **dentries;
++
++ err = au_dpages_init(&dpages, GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++ err = au_dcsub_pages(&dpages, dentry, NULL, NULL);
++ if (unlikely(err))
++ goto out_dpages;
++
++ for (i = 0; i < dpages.ndpage; i++) {
++ dpage = dpages.dpages + i;
++ dentries = dpage->dentries;
++ ndentry = dpage->ndentry;
++ for (j = 0; j < ndentry; j++) {
++ struct dentry *d;
++
++ d = dentries[j];
++ if (IS_ROOT(d))
++ continue;
++
++ d_drop(d);
++ au_digen_dec(d);
++ if (d->d_inode)
++ /* todo: reset children xino?
++ cached children only? */
++ au_iigen_dec(d->d_inode);
++ }
++ }
++
++ out_dpages:
++ au_dpages_free(&dpages);
++
++ /* discard children */
++ dentry_unhash(dentry);
++ dput(dentry);
++ out:
++ return err;
++}
++
++/*
++ * return 0 if processed.
++ */
++static int hin_gen_by_inode(char *name, unsigned int nlen, struct inode *inode,
++ const unsigned int isdir)
++{
++ int err;
++ struct dentry *d;
++ struct qstr *dname;
++
++ err = 1;
++ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) {
++ AuWarn("branch root dir was changed\n");
++ err = 0;
++ goto out;
++ }
++
++ if (!isdir) {
++ AuDebugOn(!name);
++ au_iigen_dec(inode);
++ spin_lock(&dcache_lock);
++ list_for_each_entry(d, &inode->i_dentry, d_alias) {
++ dname = &d->d_name;
++ if (dname->len != nlen
++ && memcmp(dname->name, name, nlen))
++ continue;
++ err = 0;
++ spin_lock(&d->d_lock);
++ __d_drop(d);
++ au_digen_dec(d);
++ spin_unlock(&d->d_lock);
++ break;
++ }
++ spin_unlock(&dcache_lock);
++ } else {
++ au_fset_si(au_sbi(inode->i_sb), FAILED_REFRESH_DIRS);
++ d = d_find_alias(inode);
++ if (!d) {
++ au_iigen_dec(inode);
++ goto out;
++ }
++
++ dname = &d->d_name;
++ if (dname->len == nlen && !memcmp(dname->name, name, nlen))
++ err = hin_gen_tree(d);
++ dput(d);
++ }
++
++ out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int hin_gen_by_name(struct dentry *dentry, const unsigned int isdir)
++{
++ int err;
++ struct inode *inode;
++
++ inode = dentry->d_inode;
++ if (IS_ROOT(dentry)
++ /* || (inode && inode->i_ino == AUFS_ROOT_INO) */
++ ) {
++ AuWarn("branch root dir was changed\n");
++ return 0;
++ }
++
++ err = 0;
++ if (!isdir) {
++ d_drop(dentry);
++ au_digen_dec(dentry);
++ if (inode)
++ au_iigen_dec(inode);
++ } else {
++ au_fset_si(au_sbi(dentry->d_sb), FAILED_REFRESH_DIRS);
++ if (inode)
++ err = hin_gen_tree(dentry);
++ }
++
++ AuTraceErr(err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* hinotify job flags */
++#define AuHinJob_XINO0 1
++#define AuHinJob_GEN (1 << 1)
++#define AuHinJob_DIRENT (1 << 2)
++#define AuHinJob_ISDIR (1 << 3)
++#define AuHinJob_TRYXINO0 (1 << 4)
++#define AuHinJob_MNTPNT (1 << 5)
++#define au_ftest_hinjob(flags, name) ((flags) & AuHinJob_##name)
++#define au_fset_hinjob(flags, name) { (flags) |= AuHinJob_##name; }
++#define au_fclr_hinjob(flags, name) { (flags) &= ~AuHinJob_##name; }
++
++struct hin_job_args {
++ unsigned int flags;
++ struct inode *inode, *h_inode, *dir, *h_dir;
++ struct dentry *dentry;
++ char *h_name;
++ int h_nlen;
++};
++
++static int hin_job(struct hin_job_args *a)
++{
++ const unsigned int isdir = au_ftest_hinjob(a->flags, ISDIR);
++
++ /* reset xino */
++ if (au_ftest_hinjob(a->flags, XINO0) && a->inode)
++ hin_xino(a->inode, a->h_inode); /* ignore this error */
++
++ if (au_ftest_hinjob(a->flags, TRYXINO0)
++ && a->inode
++ && a->h_inode) {
++ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
++ if (!a->h_inode->i_nlink)
++ hin_xino(a->inode, a->h_inode); /* ignore this error */
++ mutex_unlock(&a->h_inode->i_mutex);
++ }
++
++ /* make the generation obsolete */
++ if (au_ftest_hinjob(a->flags, GEN)) {
++ int err = -1;
++ if (a->inode)
++ err = hin_gen_by_inode(a->h_name, a->h_nlen, a->inode,
++ isdir);
++ if (err && a->dentry)
++ hin_gen_by_name(a->dentry, isdir);
++ /* ignore this error */
++ }
++
++ /* make dir entries obsolete */
++ if (au_ftest_hinjob(a->flags, DIRENT) && a->inode) {
++ struct au_vdir *vdir;
++
++ vdir = au_ivdir(a->inode);
++ if (vdir)
++ vdir->vd_jiffy = 0;
++ /* IMustLock(a->inode); */
++ /* a->inode->i_version++; */
++ }
++
++ /* can do nothing but warn */
++ if (au_ftest_hinjob(a->flags, MNTPNT)
++ && a->dentry
++ && d_mountpoint(a->dentry))
++ AuWarn("mount-point %.*s is removed or renamed\n",
++ AuDLNPair(a->dentry));
++
++ return 0;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static char *in_name(u32 mask)
++{
++#ifdef CONFIG_AUFS_DEBUG
++#define test_ret(flag) if (mask & flag) \
++ return #flag;
++ test_ret(IN_ACCESS);
++ test_ret(IN_MODIFY);
++ test_ret(IN_ATTRIB);
++ test_ret(IN_CLOSE_WRITE);
++ test_ret(IN_CLOSE_NOWRITE);
++ test_ret(IN_OPEN);
++ test_ret(IN_MOVED_FROM);
++ test_ret(IN_MOVED_TO);
++ test_ret(IN_CREATE);
++ test_ret(IN_DELETE);
++ test_ret(IN_DELETE_SELF);
++ test_ret(IN_MOVE_SELF);
++ test_ret(IN_UNMOUNT);
++ test_ret(IN_Q_OVERFLOW);
++ test_ret(IN_IGNORED);
++ return "";
++#undef test_ret
++#else
++ return "??";
++#endif
++}
++
++static struct dentry *lookup_wlock_by_name(char *name, unsigned int nlen,
++ struct inode *dir)
++{
++ struct dentry *dentry, *d, *parent;
++ struct qstr *dname;
++
++ parent = d_find_alias(dir);
++ if (!parent)
++ return NULL;
++
++ dentry = NULL;
++ spin_lock(&dcache_lock);
++ list_for_each_entry(d, &parent->d_subdirs, d_u.d_child) {
++ /* AuDbg("%.*s\n", AuDLNPair(d)); */
++ dname = &d->d_name;
++ if (dname->len != nlen || memcmp(dname->name, name, nlen))
++ continue;
++ if (!atomic_read(&d->d_count) || !d->d_fsdata) {
++ spin_lock(&d->d_lock);
++ __d_drop(d);
++ spin_unlock(&d->d_lock);
++ continue;
++ }
++
++ dentry = dget(d);
++ break;
++ }
++ spin_unlock(&dcache_lock);
++ dput(parent);
++
++ if (dentry)
++ di_write_lock_child(dentry);
++
++ return dentry;
++}
++
++static struct inode *lookup_wlock_by_ino(struct super_block *sb,
++ aufs_bindex_t bindex, ino_t h_ino)
++{
++ struct inode *inode;
++ ino_t ino;
++ int err;
++
++ inode = NULL;
++ err = au_xino_read(sb, bindex, h_ino, &ino);
++ if (!err && ino)
++ inode = ilookup(sb, ino);
++ if (!inode)
++ goto out;
++
++ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) {
++ AuWarn("wrong root branch\n");
++ iput(inode);
++ inode = NULL;
++ goto out;
++ }
++
++ ii_write_lock_child(inode);
++
++ out:
++ return inode;
++}
++
++enum { CHILD, PARENT };
++struct postproc_args {
++ struct inode *h_dir, *dir, *h_child_inode;
++ u32 mask;
++ unsigned int flags[2];
++ unsigned int h_child_nlen;
++ char h_child_name[];
++};
++
++static void postproc(void *_args)
++{
++ struct postproc_args *a = _args;
++ struct super_block *sb;
++ aufs_bindex_t bindex, bend, bfound;
++ unsigned char xino, try_iput;
++ int err;
++ struct inode *inode;
++ ino_t h_ino;
++ struct hin_job_args args;
++ struct dentry *dentry;
++ struct au_sbinfo *sbinfo;
++
++ AuDebugOn(!_args);
++ AuDebugOn(!a->h_dir);
++ AuDebugOn(!a->dir);
++ AuDebugOn(!a->mask);
++ AuDbg("mask 0x%x %s, i%lu, hi%lu, hci%lu\n",
++ a->mask, in_name(a->mask), a->dir->i_ino, a->h_dir->i_ino,
++ a->h_child_inode ? a->h_child_inode->i_ino : 0);
++
++ inode = NULL;
++ dentry = NULL;
++ /*
++ * do not lock a->dir->i_mutex here
++ * because of d_revalidate() may cause a deadlock.
++ */
++ sb = a->dir->i_sb;
++ AuDebugOn(!sb);
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!sbinfo);
++ /* big aufs lock */
++ si_noflush_write_lock(sb);
++
++ ii_read_lock_parent(a->dir);
++ bfound = -1;
++ bend = au_ibend(a->dir);
++ for (bindex = au_ibstart(a->dir); bindex <= bend; bindex++)
++ if (au_h_iptr(a->dir, bindex) == a->h_dir) {
++ bfound = bindex;
++ break;
++ }
++ ii_read_unlock(a->dir);
++ if (unlikely(bfound < 0))
++ goto out;
++
++ xino = !!au_opt_test(au_mntflags(sb), XINO);
++ h_ino = 0;
++ if (a->h_child_inode)
++ h_ino = a->h_child_inode->i_ino;
++
++ if (a->h_child_nlen
++ && (au_ftest_hinjob(a->flags[CHILD], GEN)
++ || au_ftest_hinjob(a->flags[CHILD], MNTPNT)))
++ dentry = lookup_wlock_by_name(a->h_child_name, a->h_child_nlen,
++ a->dir);
++ try_iput = 0;
++ if (dentry)
++ inode = dentry->d_inode;
++ if (xino && !inode && h_ino
++ && (au_ftest_hinjob(a->flags[CHILD], XINO0)
++ || au_ftest_hinjob(a->flags[CHILD], TRYXINO0)
++ || au_ftest_hinjob(a->flags[CHILD], GEN))) {
++ inode = lookup_wlock_by_ino(sb, bfound, h_ino);
++ try_iput = 1;
++ }
++
++ args.flags = a->flags[CHILD];
++ args.dentry = dentry;
++ args.inode = inode;
++ args.h_inode = a->h_child_inode;
++ args.dir = a->dir;
++ args.h_dir = a->h_dir;
++ args.h_name = a->h_child_name;
++ args.h_nlen = a->h_child_nlen;
++ err = hin_job(&args);
++ if (dentry) {
++ if (dentry->d_fsdata)
++ di_write_unlock(dentry);
++ dput(dentry);
++ }
++ if (inode && try_iput) {
++ ii_write_unlock(inode);
++ iput(inode);
++ }
++
++ ii_write_lock_parent(a->dir);
++ args.flags = a->flags[PARENT];
++ args.dentry = NULL;
++ args.inode = a->dir;
++ args.h_inode = a->h_dir;
++ args.dir = NULL;
++ args.h_dir = NULL;
++ args.h_name = NULL;
++ args.h_nlen = 0;
++ err = hin_job(&args);
++ ii_write_unlock(a->dir);
++
++ out:
++ au_nwt_done(&sbinfo->si_nowait);
++ si_write_unlock(sb);
++
++ iput(a->h_child_inode);
++ iput(a->h_dir);
++ iput(a->dir);
++ kfree(a);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void aufs_inotify(struct inotify_watch *watch, u32 wd __maybe_unused,
++ u32 mask, u32 cookie __maybe_unused,
++ const char *h_child_name, struct inode *h_child_inode)
++{
++ struct au_hinotify *hinotify;
++ struct postproc_args *args;
++ int len, wkq_err;
++ unsigned char isdir, isroot, wh;
++ char *p;
++ struct inode *dir;
++ unsigned int flags[2];
++
++ /* if IN_UNMOUNT happens, there must be another bug */
++ AuDebugOn(mask & IN_UNMOUNT);
++ if (mask & (IN_IGNORED | IN_UNMOUNT)) {
++ put_inotify_watch(watch);
++ return;
++ }
++#ifdef AuDbgHinotify
++ au_debug(1);
++ if (1 || !h_child_name || strcmp(h_child_name, AUFS_XINO_FNAME)) {
++ AuDbg("i%lu, wd %d, mask 0x%x %s, cookie 0x%x, hcname %s,"
++ " hi%lu\n",
++ watch->inode->i_ino, wd, mask, in_name(mask), cookie,
++ h_child_name ? h_child_name : "",
++ h_child_inode ? h_child_inode->i_ino : 0);
++ WARN_ON(1);
++ }
++ au_debug(0);
++#endif
++
++ hinotify = container_of(watch, struct au_hinotify, hin_watch);
++ AuDebugOn(!hinotify || !hinotify->hin_aufs_inode);
++ dir = igrab(hinotify->hin_aufs_inode);
++ if (!dir)
++ return;
++
++ isroot = (dir->i_ino == AUFS_ROOT_INO);
++ len = 0;
++ wh = 0;
++ if (h_child_name) {
++ len = strlen(h_child_name);
++ if (!memcmp(h_child_name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
++ h_child_name += AUFS_WH_PFX_LEN;
++ len -= AUFS_WH_PFX_LEN;
++ wh = 1;
++ }
++ }
++
++ isdir = 0;
++ if (h_child_inode)
++ isdir = !!S_ISDIR(h_child_inode->i_mode);
++ flags[PARENT] = AuHinJob_ISDIR;
++ flags[CHILD] = 0;
++ if (isdir)
++ flags[CHILD] = AuHinJob_ISDIR;
++ switch (mask & IN_ALL_EVENTS) {
++ case IN_MOVED_FROM:
++ case IN_MOVED_TO:
++ AuDebugOn(!h_child_name || !h_child_inode);
++ au_fset_hinjob(flags[CHILD], GEN);
++ au_fset_hinjob(flags[CHILD], XINO0);
++ au_fset_hinjob(flags[CHILD], MNTPNT);
++ au_fset_hinjob(flags[PARENT], DIRENT);
++ break;
++
++ case IN_CREATE:
++ AuDebugOn(!h_child_name || !h_child_inode);
++ au_fset_hinjob(flags[PARENT], DIRENT);
++ au_fset_hinjob(flags[CHILD], GEN);
++ break;
++
++ case IN_DELETE:
++ /*
++ * aufs never be able to get this child inode.
++ * revalidation should be in d_revalidate()
++ * by checking i_nlink, i_generation or d_unhashed().
++ */
++ AuDebugOn(!h_child_name);
++ au_fset_hinjob(flags[PARENT], DIRENT);
++ au_fset_hinjob(flags[CHILD], GEN);
++ au_fset_hinjob(flags[CHILD], TRYXINO0);
++ au_fset_hinjob(flags[CHILD], MNTPNT);
++ break;
++
++ default:
++ AuDebugOn(1);
++ }
++
++ if (wh)
++ h_child_inode = NULL;
++
++ /* iput() and kfree() will be called in postproc() */
++ /*
++ * inotify_mutex is already acquired and kmalloc/prune_icache may lock
++ * iprune_mutex. strange.
++ */
++ lockdep_off();
++ args = kmalloc(sizeof(*args) + len + 1, GFP_NOFS);
++ lockdep_on();
++ if (unlikely(!args)) {
++ AuErr1("no memory\n");
++ iput(dir);
++ return;
++ }
++ args->flags[PARENT] = flags[PARENT];
++ args->flags[CHILD] = flags[CHILD];
++ args->mask = mask;
++ args->dir = dir;
++ args->h_dir = igrab(watch->inode);
++ if (h_child_inode)
++ h_child_inode = igrab(h_child_inode); /* can be NULL */
++ args->h_child_inode = h_child_inode;
++ args->h_child_nlen = len;
++ if (len) {
++ p = (void *)args;
++ p += sizeof(*args);
++ memcpy(p, h_child_name, len + 1);
++ }
++
++ lockdep_off();
++ wkq_err = au_wkq_nowait(postproc, args, dir->i_sb);
++ lockdep_on();
++ if (unlikely(wkq_err))
++ AuErr("wkq %d\n", wkq_err);
++}
++
++static void aufs_inotify_destroy(struct inotify_watch *watch __maybe_unused)
++{
++ return;
++}
++
++static struct inotify_operations aufs_inotify_ops = {
++ .handle_event = aufs_inotify,
++ .destroy_watch = aufs_inotify_destroy
++};
++
++/* ---------------------------------------------------------------------- */
++
++static void au_hin_destroy_cache(void)
++{
++ kmem_cache_destroy(au_cachep[AuCache_HINOTIFY]);
++ au_cachep[AuCache_HINOTIFY] = NULL;
++}
++
++int __init au_hinotify_init(void)
++{
++ int err;
++
++ err = -ENOMEM;
++ au_cachep[AuCache_HINOTIFY] = AuCache(au_hinotify);
++ if (au_cachep[AuCache_HINOTIFY]) {
++ err = 0;
++ au_hin_handle = inotify_init(&aufs_inotify_ops);
++ if (IS_ERR(au_hin_handle)) {
++ err = PTR_ERR(au_hin_handle);
++ au_hin_destroy_cache();
++ }
++ }
++ AuTraceErr(err);
++ return err;
++}
++
++void au_hinotify_fin(void)
++{
++ inotify_destroy(au_hin_handle);
++ if (au_cachep[AuCache_HINOTIFY])
++ au_hin_destroy_cache();
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/iinfo.c linux-2.6.31.5/fs/aufs/iinfo.c
+--- linux-2.6.31.5.orig/fs/aufs/iinfo.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/iinfo.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,283 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode private data
++ */
++
++#include "aufs.h"
++
++struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex)
++{
++ struct inode *h_inode;
++
++ IiMustAnyLock(inode);
++
++ h_inode = au_ii(inode)->ii_hinode[0 + bindex].hi_inode;
++ AuDebugOn(h_inode && atomic_read(&h_inode->i_count) <= 0);
++ return h_inode;
++}
++
++/* todo: hard/soft set? */
++void au_set_ibstart(struct inode *inode, aufs_bindex_t bindex)
++{
++ struct au_iinfo *iinfo = au_ii(inode);
++ struct inode *h_inode;
++
++ IiMustWriteLock(inode);
++
++ iinfo->ii_bstart = bindex;
++ h_inode = iinfo->ii_hinode[bindex + 0].hi_inode;
++ if (h_inode)
++ au_cpup_igen(inode, h_inode);
++}
++
++void au_hiput(struct au_hinode *hinode)
++{
++ au_hin_free(hinode);
++ dput(hinode->hi_whdentry);
++ iput(hinode->hi_inode);
++}
++
++unsigned int au_hi_flags(struct inode *inode, int isdir)
++{
++ unsigned int flags;
++ const unsigned int mnt_flags = au_mntflags(inode->i_sb);
++
++ flags = 0;
++ if (au_opt_test(mnt_flags, XINO))
++ au_fset_hi(flags, XINO);
++ if (isdir && au_opt_test(mnt_flags, UDBA_HINOTIFY))
++ au_fset_hi(flags, HINOTIFY);
++ return flags;
++}
++
++void au_set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
++ struct inode *h_inode, unsigned int flags)
++{
++ struct au_hinode *hinode;
++ struct inode *hi;
++ struct au_iinfo *iinfo = au_ii(inode);
++
++ IiMustWriteLock(inode);
++
++ hinode = iinfo->ii_hinode + bindex;
++ hi = hinode->hi_inode;
++ AuDebugOn(h_inode && atomic_read(&h_inode->i_count) <= 0);
++ AuDebugOn(h_inode && hi);
++
++ if (hi)
++ au_hiput(hinode);
++ hinode->hi_inode = h_inode;
++ if (h_inode) {
++ int err;
++ struct super_block *sb = inode->i_sb;
++ struct au_branch *br;
++
++ if (bindex == iinfo->ii_bstart)
++ au_cpup_igen(inode, h_inode);
++ br = au_sbr(sb, bindex);
++ hinode->hi_id = br->br_id;
++ if (au_ftest_hi(flags, XINO)) {
++ err = au_xino_write(sb, bindex, h_inode->i_ino,
++ inode->i_ino);
++ if (unlikely(err))
++ AuIOErr1("failed au_xino_write() %d\n", err);
++ }
++
++ if (au_ftest_hi(flags, HINOTIFY)
++ && au_br_hinotifyable(br->br_perm)) {
++ err = au_hin_alloc(hinode, inode, h_inode);
++ if (unlikely(err))
++ AuIOErr1("au_hin_alloc() %d\n", err);
++ }
++ }
++}
++
++void au_set_hi_wh(struct inode *inode, aufs_bindex_t bindex,
++ struct dentry *h_wh)
++{
++ struct au_hinode *hinode;
++
++ IiMustWriteLock(inode);
++
++ hinode = au_ii(inode)->ii_hinode + bindex;
++ AuDebugOn(hinode->hi_whdentry);
++ hinode->hi_whdentry = h_wh;
++}
++
++void au_update_iigen(struct inode *inode)
++{
++ atomic_set(&au_ii(inode)->ii_generation, au_sigen(inode->i_sb));
++ /* smp_mb(); */ /* atomic_set */
++}
++
++/* it may be called at remount time, too */
++void au_update_brange(struct inode *inode, int do_put_zero)
++{
++ struct au_iinfo *iinfo;
++
++ iinfo = au_ii(inode);
++ if (!iinfo || iinfo->ii_bstart < 0)
++ return;
++
++ IiMustWriteLock(inode);
++
++ if (do_put_zero) {
++ aufs_bindex_t bindex;
++
++ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
++ bindex++) {
++ struct inode *h_i;
++
++ h_i = iinfo->ii_hinode[0 + bindex].hi_inode;
++ if (h_i && !h_i->i_nlink)
++ au_set_h_iptr(inode, bindex, NULL, 0);
++ }
++ }
++
++ iinfo->ii_bstart = -1;
++ while (++iinfo->ii_bstart <= iinfo->ii_bend)
++ if (iinfo->ii_hinode[0 + iinfo->ii_bstart].hi_inode)
++ break;
++ if (iinfo->ii_bstart > iinfo->ii_bend) {
++ iinfo->ii_bstart = -1;
++ iinfo->ii_bend = -1;
++ return;
++ }
++
++ iinfo->ii_bend++;
++ while (0 <= --iinfo->ii_bend)
++ if (iinfo->ii_hinode[0 + iinfo->ii_bend].hi_inode)
++ break;
++ AuDebugOn(iinfo->ii_bstart > iinfo->ii_bend || iinfo->ii_bend < 0);
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_iinfo_init(struct inode *inode)
++{
++ struct au_iinfo *iinfo;
++ struct super_block *sb;
++ int nbr, i;
++
++ sb = inode->i_sb;
++ iinfo = &(container_of(inode, struct au_icntnr, vfs_inode)->iinfo);
++ nbr = au_sbend(sb) + 1;
++ if (unlikely(nbr <= 0))
++ nbr = 1;
++ iinfo->ii_hinode = kcalloc(nbr, sizeof(*iinfo->ii_hinode), GFP_NOFS);
++ if (iinfo->ii_hinode) {
++ for (i = 0; i < nbr; i++)
++ iinfo->ii_hinode[i].hi_id = -1;
++
++ atomic_set(&iinfo->ii_generation, au_sigen(sb));
++ /* smp_mb(); */ /* atomic_set */
++ au_rw_init(&iinfo->ii_rwsem);
++ iinfo->ii_bstart = -1;
++ iinfo->ii_bend = -1;
++ iinfo->ii_vdir = NULL;
++ return 0;
++ }
++ return -ENOMEM;
++}
++
++int au_ii_realloc(struct au_iinfo *iinfo, int nbr)
++{
++ int err, sz;
++ struct au_hinode *hip;
++
++ AuRwMustWriteLock(&iinfo->ii_rwsem);
++
++ err = -ENOMEM;
++ sz = sizeof(*hip) * (iinfo->ii_bend + 1);
++ if (!sz)
++ sz = sizeof(*hip);
++ hip = au_kzrealloc(iinfo->ii_hinode, sz, sizeof(*hip) * nbr, GFP_NOFS);
++ if (hip) {
++ iinfo->ii_hinode = hip;
++ err = 0;
++ }
++
++ return err;
++}
++
++static int au_iinfo_write0(struct super_block *sb, struct au_hinode *hinode,
++ ino_t ino)
++{
++ int err;
++ aufs_bindex_t bindex;
++ unsigned char locked;
++
++ err = 0;
++ locked = !!si_noflush_read_trylock(sb);
++ bindex = au_br_index(sb, hinode->hi_id);
++ if (bindex >= 0)
++ err = au_xino_write0(sb, bindex, hinode->hi_inode->i_ino, ino);
++ /* error action? */
++ if (locked)
++ si_read_unlock(sb);
++ return err;
++}
++
++void au_iinfo_fin(struct inode *inode)
++{
++ ino_t ino;
++ aufs_bindex_t bend;
++ unsigned char unlinked = !inode->i_nlink;
++ struct au_iinfo *iinfo;
++ struct au_hinode *hi;
++ struct super_block *sb;
++
++ if (unlinked) {
++ int err = au_xigen_inc(inode);
++ if (unlikely(err))
++ AuWarn1("failed resetting i_generation, %d\n", err);
++ }
++
++ iinfo = au_ii(inode);
++ /* bad_inode case */
++ if (!iinfo)
++ return;
++
++ if (iinfo->ii_vdir)
++ au_vdir_free(iinfo->ii_vdir);
++
++ if (iinfo->ii_bstart >= 0) {
++ sb = inode->i_sb;
++ ino = 0;
++ if (unlinked)
++ ino = inode->i_ino;
++ hi = iinfo->ii_hinode + iinfo->ii_bstart;
++ bend = iinfo->ii_bend;
++ while (iinfo->ii_bstart++ <= bend) {
++ if (hi->hi_inode) {
++ if (unlinked || !hi->hi_inode->i_nlink) {
++ au_iinfo_write0(sb, hi, ino);
++ /* ignore this error */
++ ino = 0;
++ }
++ au_hiput(hi);
++ }
++ hi++;
++ }
++ }
++
++ kfree(iinfo->ii_hinode);
++ AuRwDestroy(&iinfo->ii_rwsem);
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/inode.c linux-2.6.31.5/fs/aufs/inode.c
+--- linux-2.6.31.5.orig/fs/aufs/inode.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/inode.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,380 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode functions
++ */
++
++#include "aufs.h"
++
++struct inode *au_igrab(struct inode *inode)
++{
++ if (inode) {
++ AuDebugOn(!atomic_read(&inode->i_count));
++ atomic_inc_return(&inode->i_count);
++ }
++ return inode;
++}
++
++static void au_refresh_hinode_attr(struct inode *inode, int do_version)
++{
++ au_cpup_attr_all(inode, /*force*/0);
++ au_update_iigen(inode);
++ if (do_version)
++ inode->i_version++;
++}
++
++int au_refresh_hinode_self(struct inode *inode, int do_attr)
++{
++ int err;
++ aufs_bindex_t bindex, new_bindex;
++ unsigned char update;
++ struct inode *first;
++ struct au_hinode *p, *q, tmp;
++ struct super_block *sb;
++ struct au_iinfo *iinfo;
++
++ IiMustWriteLock(inode);
++
++ update = 0;
++ sb = inode->i_sb;
++ iinfo = au_ii(inode);
++ err = au_ii_realloc(iinfo, au_sbend(sb) + 1);
++ if (unlikely(err))
++ goto out;
++
++ p = iinfo->ii_hinode + iinfo->ii_bstart;
++ first = p->hi_inode;
++ err = 0;
++ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
++ bindex++, p++) {
++ if (!p->hi_inode)
++ continue;
++
++ new_bindex = au_br_index(sb, p->hi_id);
++ if (new_bindex == bindex)
++ continue;
++
++ if (new_bindex < 0) {
++ update++;
++ au_hiput(p);
++ p->hi_inode = NULL;
++ continue;
++ }
++
++ if (new_bindex < iinfo->ii_bstart)
++ iinfo->ii_bstart = new_bindex;
++ if (iinfo->ii_bend < new_bindex)
++ iinfo->ii_bend = new_bindex;
++ /* swap two lower inode, and loop again */
++ q = iinfo->ii_hinode + new_bindex;
++ tmp = *q;
++ *q = *p;
++ *p = tmp;
++ if (tmp.hi_inode) {
++ bindex--;
++ p--;
++ }
++ }
++ au_update_brange(inode, /*do_put_zero*/0);
++ if (do_attr)
++ au_refresh_hinode_attr(inode, update && S_ISDIR(inode->i_mode));
++
++ out:
++ return err;
++}
++
++int au_refresh_hinode(struct inode *inode, struct dentry *dentry)
++{
++ int err, update;
++ unsigned int flags;
++ aufs_bindex_t bindex, bend;
++ unsigned char isdir;
++ struct inode *first;
++ struct au_hinode *p;
++ struct au_iinfo *iinfo;
++
++ err = au_refresh_hinode_self(inode, /*do_attr*/0);
++ if (unlikely(err))
++ goto out;
++
++ update = 0;
++ iinfo = au_ii(inode);
++ p = iinfo->ii_hinode + iinfo->ii_bstart;
++ first = p->hi_inode;
++ isdir = S_ISDIR(inode->i_mode);
++ flags = au_hi_flags(inode, isdir);
++ bend = au_dbend(dentry);
++ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++) {
++ struct inode *h_i;
++ struct dentry *h_d;
++
++ h_d = au_h_dptr(dentry, bindex);
++ if (!h_d || !h_d->d_inode)
++ continue;
++
++ if (iinfo->ii_bstart <= bindex && bindex <= iinfo->ii_bend) {
++ h_i = au_h_iptr(inode, bindex);
++ if (h_i) {
++ if (h_i == h_d->d_inode)
++ continue;
++ err = -EIO;
++ break;
++ }
++ }
++ if (bindex < iinfo->ii_bstart)
++ iinfo->ii_bstart = bindex;
++ if (iinfo->ii_bend < bindex)
++ iinfo->ii_bend = bindex;
++ au_set_h_iptr(inode, bindex, au_igrab(h_d->d_inode), flags);
++ update = 1;
++ }
++ au_update_brange(inode, /*do_put_zero*/0);
++
++ if (unlikely(err))
++ goto out;
++
++ au_refresh_hinode_attr(inode, update && isdir);
++
++ out:
++ return err;
++}
++
++static int set_inode(struct inode *inode, struct dentry *dentry)
++{
++ int err;
++ unsigned int flags;
++ umode_t mode;
++ aufs_bindex_t bindex, bstart, btail;
++ unsigned char isdir;
++ struct dentry *h_dentry;
++ struct inode *h_inode;
++ struct au_iinfo *iinfo;
++
++ IiMustWriteLock(inode);
++
++ err = 0;
++ isdir = 0;
++ bstart = au_dbstart(dentry);
++ h_inode = au_h_dptr(dentry, bstart)->d_inode;
++ mode = h_inode->i_mode;
++ switch (mode & S_IFMT) {
++ case S_IFREG:
++ btail = au_dbtail(dentry);
++ inode->i_op = &aufs_iop;
++ inode->i_fop = &aufs_file_fop;
++ inode->i_mapping->a_ops = &aufs_aop;
++ break;
++ case S_IFDIR:
++ isdir = 1;
++ btail = au_dbtaildir(dentry);
++ inode->i_op = &aufs_dir_iop;
++ inode->i_fop = &aufs_dir_fop;
++ break;
++ case S_IFLNK:
++ btail = au_dbtail(dentry);
++ inode->i_op = &aufs_symlink_iop;
++ break;
++ case S_IFBLK:
++ case S_IFCHR:
++ case S_IFIFO:
++ case S_IFSOCK:
++ btail = au_dbtail(dentry);
++ inode->i_op = &aufs_iop;
++ init_special_inode(inode, mode, h_inode->i_rdev);
++ break;
++ default:
++ AuIOErr("Unknown file type 0%o\n", mode);
++ err = -EIO;
++ goto out;
++ }
++
++ /* do not set inotify for whiteouted dirs (SHWH mode) */
++ flags = au_hi_flags(inode, isdir);
++ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH)
++ && au_ftest_hi(flags, HINOTIFY)
++ && dentry->d_name.len > AUFS_WH_PFX_LEN
++ && !memcmp(dentry->d_name.name, AUFS_WH_PFX, AUFS_WH_PFX_LEN))
++ au_fclr_hi(flags, HINOTIFY);
++ iinfo = au_ii(inode);
++ iinfo->ii_bstart = bstart;
++ iinfo->ii_bend = btail;
++ for (bindex = bstart; bindex <= btail; bindex++) {
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (h_dentry)
++ au_set_h_iptr(inode, bindex,
++ au_igrab(h_dentry->d_inode), flags);
++ }
++ au_cpup_attr_all(inode, /*force*/1);
++
++ out:
++ return err;
++}
++
++/* successful returns with iinfo write_locked */
++static int reval_inode(struct inode *inode, struct dentry *dentry, int *matched)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ struct inode *h_inode, *h_dinode;
++
++ *matched = 0;
++
++ /*
++ * before this function, if aufs got any iinfo lock, it must be only
++ * one, the parent dir.
++ * it can happen by UDBA and the obsoleted inode number.
++ */
++ err = -EIO;
++ if (unlikely(inode->i_ino == parent_ino(dentry)))
++ goto out;
++
++ err = 0;
++ ii_write_lock_new_child(inode);
++ h_dinode = au_h_dptr(dentry, au_dbstart(dentry))->d_inode;
++ bend = au_ibend(inode);
++ for (bindex = au_ibstart(inode); bindex <= bend; bindex++) {
++ h_inode = au_h_iptr(inode, bindex);
++ if (h_inode && h_inode == h_dinode) {
++ *matched = 1;
++ err = 0;
++ if (au_iigen(inode) != au_digen(dentry))
++ err = au_refresh_hinode(inode, dentry);
++ break;
++ }
++ }
++
++ if (unlikely(err))
++ ii_write_unlock(inode);
++ out:
++ return err;
++}
++
++/* successful returns with iinfo write_locked */
++/* todo: return with unlocked? */
++struct inode *au_new_inode(struct dentry *dentry, int must_new)
++{
++ struct inode *inode;
++ struct dentry *h_dentry;
++ struct super_block *sb;
++ ino_t h_ino, ino;
++ int err, match;
++ aufs_bindex_t bstart;
++
++ sb = dentry->d_sb;
++ bstart = au_dbstart(dentry);
++ h_dentry = au_h_dptr(dentry, bstart);
++ h_ino = h_dentry->d_inode->i_ino;
++ err = au_xino_read(sb, bstart, h_ino, &ino);
++ inode = ERR_PTR(err);
++ if (unlikely(err))
++ goto out;
++ new_ino:
++ if (!ino) {
++ ino = au_xino_new_ino(sb);
++ if (unlikely(!ino)) {
++ inode = ERR_PTR(-EIO);
++ goto out;
++ }
++ }
++
++ AuDbg("i%lu\n", (unsigned long)ino);
++ inode = au_iget_locked(sb, ino);
++ err = PTR_ERR(inode);
++ if (IS_ERR(inode))
++ goto out;
++
++ AuDbg("%lx, new %d\n", inode->i_state, !!(inode->i_state & I_NEW));
++ if (inode->i_state & I_NEW) {
++ ii_write_lock_new_child(inode);
++ err = set_inode(inode, dentry);
++ unlock_new_inode(inode);
++ if (!err)
++ goto out; /* success */
++
++ iget_failed(inode);
++ ii_write_unlock(inode);
++ goto out_iput;
++ } else if (!must_new) {
++ err = reval_inode(inode, dentry, &match);
++ if (!err)
++ goto out; /* success */
++ else if (match)
++ goto out_iput;
++ }
++
++ if (unlikely(au_test_fs_unique_ino(h_dentry->d_inode)))
++ AuWarn1("Warning: Un-notified UDBA or repeatedly renamed dir,"
++ " b%d, %s, %.*s, hi%lu, i%lu.\n",
++ bstart, au_sbtype(h_dentry->d_sb), AuDLNPair(dentry),
++ (unsigned long)h_ino, (unsigned long)ino);
++ ino = 0;
++ err = au_xino_write(sb, bstart, h_ino, /*ino*/0);
++ if (!err) {
++ iput(inode);
++ goto new_ino;
++ }
++
++ out_iput:
++ iput(inode);
++ inode = ERR_PTR(err);
++ out:
++ return inode;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_test_ro(struct super_block *sb, aufs_bindex_t bindex,
++ struct inode *inode)
++{
++ int err;
++
++ err = au_br_rdonly(au_sbr(sb, bindex));
++
++ /* pseudo-link after flushed may happen out of bounds */
++ if (!err
++ && inode
++ && au_ibstart(inode) <= bindex
++ && bindex <= au_ibend(inode)) {
++ /*
++ * permission check is unnecessary since vfsub routine
++ * will be called later
++ */
++ struct inode *hi = au_h_iptr(inode, bindex);
++ if (hi)
++ err = IS_IMMUTABLE(hi) ? -EROFS : 0;
++ }
++
++ return err;
++}
++
++int au_test_h_perm(struct inode *h_inode, int mask)
++{
++ if (!current_fsuid())
++ return 0;
++ return inode_permission(h_inode, mask);
++}
++
++int au_test_h_perm_sio(struct inode *h_inode, int mask)
++{
++ if (au_test_nfs(h_inode->i_sb)
++ && (mask & MAY_WRITE)
++ && S_ISDIR(h_inode->i_mode))
++ mask |= MAY_READ; /* force permission check */
++ return au_test_h_perm(h_inode, mask);
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/inode.h linux-2.6.31.5/fs/aufs/inode.h
+--- linux-2.6.31.5.orig/fs/aufs/inode.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/inode.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,484 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode operations
++ */
++
++#ifndef __AUFS_INODE_H__
++#define __AUFS_INODE_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/inotify.h>
++#include <linux/aufs_type.h>
++#include "rwsem.h"
++
++struct vfsmount;
++
++struct au_hinotify {
++#ifdef CONFIG_AUFS_HINOTIFY
++ struct inotify_watch hin_watch;
++ struct inode *hin_aufs_inode; /* no get/put */
++#endif
++};
++
++struct au_hinode {
++ struct inode *hi_inode;
++ aufs_bindex_t hi_id;
++#ifdef CONFIG_AUFS_HINOTIFY
++ struct au_hinotify *hi_notify;
++#endif
++
++ /* reference to the copied-up whiteout with get/put */
++ struct dentry *hi_whdentry;
++};
++
++struct au_vdir;
++struct au_iinfo {
++ atomic_t ii_generation;
++ struct super_block *ii_hsb1; /* no get/put */
++
++ struct au_rwsem ii_rwsem;
++ aufs_bindex_t ii_bstart, ii_bend;
++ __u32 ii_higen;
++ struct au_hinode *ii_hinode;
++ struct au_vdir *ii_vdir;
++};
++
++struct au_icntnr {
++ struct au_iinfo iinfo;
++ struct inode vfs_inode;
++};
++
++/* au_pin flags */
++#define AuPin_DI_LOCKED 1
++#define AuPin_MNT_WRITE (1 << 1)
++#define au_ftest_pin(flags, name) ((flags) & AuPin_##name)
++#define au_fset_pin(flags, name) { (flags) |= AuPin_##name; }
++#define au_fclr_pin(flags, name) { (flags) &= ~AuPin_##name; }
++
++struct au_pin {
++ /* input */
++ struct dentry *dentry;
++ unsigned int udba;
++ unsigned char lsc_di, lsc_hi, flags;
++ aufs_bindex_t bindex;
++
++ /* output */
++ struct dentry *parent;
++ struct au_hinode *hdir;
++ struct vfsmount *h_mnt;
++};
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct au_iinfo *au_ii(struct inode *inode)
++{
++ struct au_iinfo *iinfo;
++
++ iinfo = &(container_of(inode, struct au_icntnr, vfs_inode)->iinfo);
++ if (iinfo->ii_hinode)
++ return iinfo;
++ return NULL; /* debugging bad_inode case */
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* inode.c */
++struct inode *au_igrab(struct inode *inode);
++int au_refresh_hinode_self(struct inode *inode, int do_attr);
++int au_refresh_hinode(struct inode *inode, struct dentry *dentry);
++struct inode *au_new_inode(struct dentry *dentry, int must_new);
++int au_test_ro(struct super_block *sb, aufs_bindex_t bindex,
++ struct inode *inode);
++int au_test_h_perm(struct inode *h_inode, int mask);
++int au_test_h_perm_sio(struct inode *h_inode, int mask);
++
++/* i_op.c */
++extern struct inode_operations aufs_iop, aufs_symlink_iop, aufs_dir_iop;
++
++/* au_wr_dir flags */
++#define AuWrDir_ADD_ENTRY 1
++#define AuWrDir_ISDIR (1 << 1)
++#define au_ftest_wrdir(flags, name) ((flags) & AuWrDir_##name)
++#define au_fset_wrdir(flags, name) { (flags) |= AuWrDir_##name; }
++#define au_fclr_wrdir(flags, name) { (flags) &= ~AuWrDir_##name; }
++
++struct au_wr_dir_args {
++ aufs_bindex_t force_btgt;
++ unsigned char flags;
++};
++int au_wr_dir(struct dentry *dentry, struct dentry *src_dentry,
++ struct au_wr_dir_args *args);
++
++struct dentry *au_pinned_h_parent(struct au_pin *pin);
++void au_pin_init(struct au_pin *pin, struct dentry *dentry,
++ aufs_bindex_t bindex, int lsc_di, int lsc_hi,
++ unsigned int udba, unsigned char flags);
++int au_pin(struct au_pin *pin, struct dentry *dentry, aufs_bindex_t bindex,
++ unsigned int udba, unsigned char flags) __must_check;
++int au_do_pin(struct au_pin *pin) __must_check;
++void au_unpin(struct au_pin *pin);
++
++/* i_op_add.c */
++int au_may_add(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent, int isdir);
++int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
++int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
++int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *nd);
++int aufs_link(struct dentry *src_dentry, struct inode *dir,
++ struct dentry *dentry);
++int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
++
++/* i_op_del.c */
++int au_wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup);
++int au_may_del(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent, int isdir);
++int aufs_unlink(struct inode *dir, struct dentry *dentry);
++int aufs_rmdir(struct inode *dir, struct dentry *dentry);
++
++/* i_op_ren.c */
++int au_wbr(struct dentry *dentry, aufs_bindex_t btgt);
++int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
++ struct inode *dir, struct dentry *dentry);
++
++/* iinfo.c */
++struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex);
++void au_hiput(struct au_hinode *hinode);
++void au_set_ibstart(struct inode *inode, aufs_bindex_t bindex);
++void au_set_hi_wh(struct inode *inode, aufs_bindex_t bindex,
++ struct dentry *h_wh);
++unsigned int au_hi_flags(struct inode *inode, int isdir);
++
++/* hinode flags */
++#define AuHi_XINO 1
++#define AuHi_HINOTIFY (1 << 1)
++#define au_ftest_hi(flags, name) ((flags) & AuHi_##name)
++#define au_fset_hi(flags, name) { (flags) |= AuHi_##name; }
++#define au_fclr_hi(flags, name) { (flags) &= ~AuHi_##name; }
++
++#ifndef CONFIG_AUFS_HINOTIFY
++#undef AuHi_HINOTIFY
++#define AuHi_HINOTIFY 0
++#endif
++
++void au_set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
++ struct inode *h_inode, unsigned int flags);
++
++void au_update_iigen(struct inode *inode);
++void au_update_brange(struct inode *inode, int do_put_zero);
++
++int au_iinfo_init(struct inode *inode);
++void au_iinfo_fin(struct inode *inode);
++int au_ii_realloc(struct au_iinfo *iinfo, int nbr);
++
++/* plink.c */
++void au_plink_block_maintain(struct super_block *sb);
++#ifdef CONFIG_AUFS_DEBUG
++void au_plink_list(struct super_block *sb);
++#else
++static inline void au_plink_list(struct super_block *sb)
++{
++ /* nothing */
++}
++#endif
++int au_plink_test(struct inode *inode);
++struct dentry *au_plink_lkup(struct inode *inode, aufs_bindex_t bindex);
++void au_plink_append(struct inode *inode, aufs_bindex_t bindex,
++ struct dentry *h_dentry);
++void au_plink_put(struct super_block *sb);
++void au_plink_half_refresh(struct super_block *sb, aufs_bindex_t br_id);
++
++/* ---------------------------------------------------------------------- */
++
++/* lock subclass for iinfo */
++enum {
++ AuLsc_II_CHILD, /* child first */
++ AuLsc_II_CHILD2, /* rename(2), link(2), and cpup at hinotify */
++ AuLsc_II_CHILD3, /* copyup dirs */
++ AuLsc_II_PARENT, /* see AuLsc_I_PARENT in vfsub.h */
++ AuLsc_II_PARENT2,
++ AuLsc_II_PARENT3, /* copyup dirs */
++ AuLsc_II_NEW_CHILD
++};
++
++/*
++ * ii_read_lock_child, ii_write_lock_child,
++ * ii_read_lock_child2, ii_write_lock_child2,
++ * ii_read_lock_child3, ii_write_lock_child3,
++ * ii_read_lock_parent, ii_write_lock_parent,
++ * ii_read_lock_parent2, ii_write_lock_parent2,
++ * ii_read_lock_parent3, ii_write_lock_parent3,
++ * ii_read_lock_new_child, ii_write_lock_new_child,
++ */
++#define AuReadLockFunc(name, lsc) \
++static inline void ii_read_lock_##name(struct inode *i) \
++{ \
++ au_rw_read_lock_nested(&au_ii(i)->ii_rwsem, AuLsc_II_##lsc); \
++}
++
++#define AuWriteLockFunc(name, lsc) \
++static inline void ii_write_lock_##name(struct inode *i) \
++{ \
++ au_rw_write_lock_nested(&au_ii(i)->ii_rwsem, AuLsc_II_##lsc); \
++}
++
++#define AuRWLockFuncs(name, lsc) \
++ AuReadLockFunc(name, lsc) \
++ AuWriteLockFunc(name, lsc)
++
++AuRWLockFuncs(child, CHILD);
++AuRWLockFuncs(child2, CHILD2);
++AuRWLockFuncs(child3, CHILD3);
++AuRWLockFuncs(parent, PARENT);
++AuRWLockFuncs(parent2, PARENT2);
++AuRWLockFuncs(parent3, PARENT3);
++AuRWLockFuncs(new_child, NEW_CHILD);
++
++#undef AuReadLockFunc
++#undef AuWriteLockFunc
++#undef AuRWLockFuncs
++
++/*
++ * ii_read_unlock, ii_write_unlock, ii_downgrade_lock
++ */
++AuSimpleUnlockRwsemFuncs(ii, struct inode *i, &au_ii(i)->ii_rwsem);
++
++#define IiMustNoWaiters(i) AuRwMustNoWaiters(&au_ii(i)->ii_rwsem)
++#define IiMustAnyLock(i) AuRwMustAnyLock(&au_ii(i)->ii_rwsem)
++#define IiMustWriteLock(i) AuRwMustWriteLock(&au_ii(i)->ii_rwsem)
++
++/* ---------------------------------------------------------------------- */
++
++static inline unsigned int au_iigen(struct inode *inode)
++{
++ return atomic_read(&au_ii(inode)->ii_generation);
++}
++
++/* tiny test for inode number */
++/* tmpfs generation is too rough */
++static inline int au_test_higen(struct inode *inode, struct inode *h_inode)
++{
++ struct au_iinfo *iinfo;
++
++ iinfo = au_ii(inode);
++ AuRwMustAnyLock(&iinfo->ii_rwsem);
++ return !(iinfo->ii_hsb1 == h_inode->i_sb
++ && iinfo->ii_higen == h_inode->i_generation);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static inline aufs_bindex_t au_ii_br_id(struct inode *inode,
++ aufs_bindex_t bindex)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_hinode[0 + bindex].hi_id;
++}
++
++static inline aufs_bindex_t au_ibstart(struct inode *inode)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_bstart;
++}
++
++static inline aufs_bindex_t au_ibend(struct inode *inode)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_bend;
++}
++
++static inline struct au_vdir *au_ivdir(struct inode *inode)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_vdir;
++}
++
++static inline struct dentry *au_hi_wh(struct inode *inode, aufs_bindex_t bindex)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_hinode[0 + bindex].hi_whdentry;
++}
++
++static inline void au_set_ibend(struct inode *inode, aufs_bindex_t bindex)
++{
++ IiMustWriteLock(inode);
++ au_ii(inode)->ii_bend = bindex;
++}
++
++static inline void au_set_ivdir(struct inode *inode, struct au_vdir *vdir)
++{
++ IiMustWriteLock(inode);
++ au_ii(inode)->ii_vdir = vdir;
++}
++
++static inline struct au_hinode *au_hi(struct inode *inode, aufs_bindex_t bindex)
++{
++ IiMustAnyLock(inode);
++ return au_ii(inode)->ii_hinode + bindex;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct dentry *au_pinned_parent(struct au_pin *pin)
++{
++ if (pin)
++ return pin->parent;
++ return NULL;
++}
++
++static inline struct inode *au_pinned_h_dir(struct au_pin *pin)
++{
++ if (pin && pin->hdir)
++ return pin->hdir->hi_inode;
++ return NULL;
++}
++
++static inline struct au_hinode *au_pinned_hdir(struct au_pin *pin)
++{
++ if (pin)
++ return pin->hdir;
++ return NULL;
++}
++
++static inline void au_pin_set_dentry(struct au_pin *pin, struct dentry *dentry)
++{
++ if (pin)
++ pin->dentry = dentry;
++}
++
++static inline void au_pin_set_parent_lflag(struct au_pin *pin,
++ unsigned char lflag)
++{
++ if (pin) {
++ /* dirty macros require brackets */
++ if (lflag) {
++ au_fset_pin(pin->flags, DI_LOCKED);
++ } else {
++ au_fclr_pin(pin->flags, DI_LOCKED);
++ }
++ }
++}
++
++static inline void au_pin_set_parent(struct au_pin *pin, struct dentry *parent)
++{
++ if (pin) {
++ dput(pin->parent);
++ pin->parent = dget(parent);
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_HINOTIFY
++/* hinotify.c */
++int au_hin_alloc(struct au_hinode *hinode, struct inode *inode,
++ struct inode *h_inode);
++void au_hin_free(struct au_hinode *hinode);
++void au_hin_ctl(struct au_hinode *hinode, int do_set);
++void au_reset_hinotify(struct inode *inode, unsigned int flags);
++
++int __init au_hinotify_init(void);
++void au_hinotify_fin(void);
++
++static inline
++void au_hin_init(struct au_hinode *hinode, struct au_hinotify *val)
++{
++ hinode->hi_notify = val;
++}
++
++static inline void au_iigen_dec(struct inode *inode)
++{
++ atomic_dec_return(&au_ii(inode)->ii_generation);
++}
++
++#else
++static inline
++int au_hin_alloc(struct au_hinode *hinode __maybe_unused,
++ struct inode *inode __maybe_unused,
++ struct inode *h_inode __maybe_unused)
++{
++ return -EOPNOTSUPP;
++}
++
++static inline void au_hin_free(struct au_hinode *hinode __maybe_unused)
++{
++ /* nothing */
++}
++
++static inline void au_hin_ctl(struct au_hinode *hinode __maybe_unused,
++ int do_set __maybe_unused)
++{
++ /* nothing */
++}
++
++static inline void au_reset_hinotify(struct inode *inode __maybe_unused,
++ unsigned int flags __maybe_unused)
++{
++ /* nothing */
++}
++
++static inline int au_hinotify_init(void)
++{
++ return 0;
++}
++
++#define au_hinotify_fin() do {} while (0)
++
++static inline
++void au_hin_init(struct au_hinode *hinode __maybe_unused,
++ struct au_hinotify *val __maybe_unused)
++{
++ /* empty */
++}
++#endif /* CONFIG_AUFS_HINOTIFY */
++
++static inline void au_hin_suspend(struct au_hinode *hdir)
++{
++ au_hin_ctl(hdir, /*do_set*/0);
++}
++
++static inline void au_hin_resume(struct au_hinode *hdir)
++{
++ au_hin_ctl(hdir, /*do_set*/1);
++}
++
++static inline void au_hin_imtx_lock(struct au_hinode *hdir)
++{
++ mutex_lock(&hdir->hi_inode->i_mutex);
++ au_hin_suspend(hdir);
++}
++
++static inline void au_hin_imtx_lock_nested(struct au_hinode *hdir,
++ unsigned int sc __maybe_unused)
++{
++ mutex_lock_nested(&hdir->hi_inode->i_mutex, sc);
++ au_hin_suspend(hdir);
++}
++
++static inline void au_hin_imtx_unlock(struct au_hinode *hdir)
++{
++ au_hin_resume(hdir);
++ mutex_unlock(&hdir->hi_inode->i_mutex);
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_INODE_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/ioctl.c linux-2.6.31.5/fs/aufs/ioctl.c
+--- linux-2.6.31.5.orig/fs/aufs/ioctl.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/ioctl.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,67 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * ioctl
++ * currently plink-management only.
++ */
++
++#include <linux/uaccess.h>
++#include "aufs.h"
++
++long aufs_ioctl_dir(struct file *file, unsigned int cmd,
++ unsigned long arg __maybe_unused)
++{
++ long err;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++
++ err = -EACCES;
++ if (!capable(CAP_SYS_ADMIN))
++ goto out;
++
++ err = 0;
++ sb = file->f_dentry->d_sb;
++ sbinfo = au_sbi(sb);
++ switch (cmd) {
++ case AUFS_CTL_PLINK_MAINT:
++ /*
++ * pseudo-link maintenance mode,
++ * cleared by aufs_release_dir()
++ */
++ si_write_lock(sb);
++ if (!au_ftest_si(sbinfo, MAINTAIN_PLINK)) {
++ au_fset_si(sbinfo, MAINTAIN_PLINK);
++ au_fi(file)->fi_maintain_plink = 1;
++ } else
++ err = -EBUSY;
++ si_write_unlock(sb);
++ break;
++ case AUFS_CTL_PLINK_CLEAN:
++ aufs_write_lock(sb->s_root);
++ if (au_opt_test(sbinfo->si_mntflags, PLINK))
++ au_plink_put(sb);
++ aufs_write_unlock(sb->s_root);
++ break;
++ default:
++ err = -EINVAL;
++ }
++
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/i_op_add.c linux-2.6.31.5/fs/aufs/i_op_add.c
+--- linux-2.6.31.5.orig/fs/aufs/i_op_add.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/i_op_add.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,649 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode operations (add entry)
++ */
++
++#include "aufs.h"
++
++/*
++ * final procedure of adding a new entry, except link(2).
++ * remove whiteout, instantiate, copyup the parent dir's times and size
++ * and update version.
++ * if it failed, re-create the removed whiteout.
++ */
++static int epilog(struct inode *dir, aufs_bindex_t bindex,
++ struct dentry *wh_dentry, struct dentry *dentry)
++{
++ int err, rerr;
++ aufs_bindex_t bwh;
++ struct path h_path;
++ struct inode *inode, *h_dir;
++ struct dentry *wh;
++
++ bwh = -1;
++ if (wh_dentry) {
++ h_dir = wh_dentry->d_parent->d_inode; /* dir inode is locked */
++ IMustLock(h_dir);
++ AuDebugOn(au_h_iptr(dir, bindex) != h_dir);
++ bwh = au_dbwh(dentry);
++ h_path.dentry = wh_dentry;
++ h_path.mnt = au_sbr_mnt(dir->i_sb, bindex);
++ err = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path,
++ dentry);
++ if (unlikely(err))
++ goto out;
++ }
++
++ inode = au_new_inode(dentry, /*must_new*/1);
++ if (!IS_ERR(inode)) {
++ d_instantiate(dentry, inode);
++ dir = dentry->d_parent->d_inode; /* dir inode is locked */
++ IMustLock(dir);
++ if (au_ibstart(dir) == au_dbstart(dentry))
++ au_cpup_attr_timesizes(dir);
++ dir->i_version++;
++ return 0; /* success */
++ }
++
++ err = PTR_ERR(inode);
++ if (!wh_dentry)
++ goto out;
++
++ /* revert */
++ /* dir inode is locked */
++ wh = au_wh_create(dentry, bwh, wh_dentry->d_parent);
++ rerr = PTR_ERR(wh);
++ if (IS_ERR(wh)) {
++ AuIOErr("%.*s reverting whiteout failed(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ err = -EIO;
++ } else
++ dput(wh);
++
++ out:
++ return err;
++}
++
++/*
++ * simple tests for the adding inode operations.
++ * following the checks in vfs, plus the parent-child relationship.
++ */
++int au_may_add(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent, int isdir)
++{
++ int err;
++ umode_t h_mode;
++ struct dentry *h_dentry;
++ struct inode *h_inode;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ h_inode = h_dentry->d_inode;
++ if (!dentry->d_inode) {
++ err = -EEXIST;
++ if (unlikely(h_inode))
++ goto out;
++ } else {
++ /* rename(2) case */
++ err = -EIO;
++ if (unlikely(!h_inode || !h_inode->i_nlink))
++ goto out;
++
++ h_mode = h_inode->i_mode;
++ if (!isdir) {
++ err = -EISDIR;
++ if (unlikely(S_ISDIR(h_mode)))
++ goto out;
++ } else if (unlikely(!S_ISDIR(h_mode))) {
++ err = -ENOTDIR;
++ goto out;
++ }
++ }
++
++ err = -EIO;
++ /* expected parent dir is locked */
++ if (unlikely(h_parent != h_dentry->d_parent))
++ goto out;
++ err = 0;
++
++ out:
++ return err;
++}
++
++/*
++ * initial procedure of adding a new entry.
++ * prepare writable branch and the parent dir, lock it,
++ * and lookup whiteout for the new entry.
++ */
++static struct dentry*
++lock_hdir_lkup_wh(struct dentry *dentry, struct au_dtime *dt,
++ struct dentry *src_dentry, struct au_pin *pin,
++ struct au_wr_dir_args *wr_dir_args)
++{
++ struct dentry *wh_dentry, *h_parent;
++ struct super_block *sb;
++ struct au_branch *br;
++ int err;
++ unsigned int udba;
++ aufs_bindex_t bcpup;
++
++ err = au_wr_dir(dentry, src_dentry, wr_dir_args);
++ bcpup = err;
++ wh_dentry = ERR_PTR(err);
++ if (unlikely(err < 0))
++ goto out;
++
++ sb = dentry->d_sb;
++ udba = au_opt_udba(sb);
++ err = au_pin(pin, dentry, bcpup, udba,
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ wh_dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out;
++
++ h_parent = au_pinned_h_parent(pin);
++ if (udba != AuOpt_UDBA_NONE
++ && au_dbstart(dentry) == bcpup) {
++ err = au_may_add(dentry, bcpup, h_parent,
++ au_ftest_wrdir(wr_dir_args->flags, ISDIR));
++ wh_dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out_unpin;
++ }
++
++ br = au_sbr(sb, bcpup);
++ if (dt) {
++ struct path tmp = {
++ .dentry = h_parent,
++ .mnt = br->br_mnt
++ };
++ au_dtime_store(dt, au_pinned_parent(pin), &tmp);
++ }
++
++ wh_dentry = NULL;
++ if (bcpup != au_dbwh(dentry))
++ goto out; /* success */
++
++ wh_dentry = au_wh_lkup(h_parent, &dentry->d_name, br);
++
++ out_unpin:
++ if (IS_ERR(wh_dentry))
++ au_unpin(pin);
++ out:
++ return wh_dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++enum { Mknod, Symlink, Creat };
++struct simple_arg {
++ int type;
++ union {
++ struct {
++ int mode;
++ struct nameidata *nd;
++ } c;
++ struct {
++ const char *symname;
++ } s;
++ struct {
++ int mode;
++ dev_t dev;
++ } m;
++ } u;
++};
++
++static int add_simple(struct inode *dir, struct dentry *dentry,
++ struct simple_arg *arg)
++{
++ int err;
++ aufs_bindex_t bstart;
++ unsigned char created;
++ struct au_dtime dt;
++ struct au_pin pin;
++ struct path h_path;
++ struct dentry *wh_dentry, *parent;
++ struct inode *h_dir;
++ struct au_wr_dir_args wr_dir_args = {
++ .force_btgt = -1,
++ .flags = AuWrDir_ADD_ENTRY
++ };
++
++ IMustLock(dir);
++
++ parent = dentry->d_parent; /* dir inode is locked */
++ aufs_read_lock(dentry, AuLock_DW);
++ di_write_lock_parent(parent);
++ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL, &pin,
++ &wr_dir_args);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out;
++
++ bstart = au_dbstart(dentry);
++ h_path.dentry = au_h_dptr(dentry, bstart);
++ h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart);
++ h_dir = au_pinned_h_dir(&pin);
++ switch (arg->type) {
++ case Creat:
++ err = vfsub_create(h_dir, &h_path, arg->u.c.mode);
++ break;
++ case Symlink:
++ err = vfsub_symlink(h_dir, &h_path, arg->u.s.symname);
++ break;
++ case Mknod:
++ err = vfsub_mknod(h_dir, &h_path, arg->u.m.mode, arg->u.m.dev);
++ break;
++ default:
++ BUG();
++ }
++ created = !err;
++ if (!err)
++ err = epilog(dir, bstart, wh_dentry, dentry);
++
++ /* revert */
++ if (unlikely(created && err && h_path.dentry->d_inode)) {
++ int rerr;
++ rerr = vfsub_unlink(h_dir, &h_path, /*force*/0);
++ if (rerr) {
++ AuIOErr("%.*s revert failure(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ err = -EIO;
++ }
++ au_dtime_revert(&dt);
++ d_drop(dentry);
++ }
++
++ au_unpin(&pin);
++ dput(wh_dentry);
++
++ out:
++ if (unlikely(err)) {
++ au_update_dbstart(dentry);
++ d_drop(dentry);
++ }
++ di_write_unlock(parent);
++ aufs_read_unlock(dentry, AuLock_DW);
++ return err;
++}
++
++int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
++{
++ struct simple_arg arg = {
++ .type = Mknod,
++ .u.m = {
++ .mode = mode,
++ .dev = dev
++ }
++ };
++ return add_simple(dir, dentry, &arg);
++}
++
++int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
++{
++ struct simple_arg arg = {
++ .type = Symlink,
++ .u.s.symname = symname
++ };
++ return add_simple(dir, dentry, &arg);
++}
++
++int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *nd)
++{
++ struct simple_arg arg = {
++ .type = Creat,
++ .u.c = {
++ .mode = mode,
++ .nd = nd
++ }
++ };
++ return add_simple(dir, dentry, &arg);
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct au_link_args {
++ aufs_bindex_t bdst, bsrc;
++ struct au_pin pin;
++ struct path h_path;
++ struct dentry *src_parent, *parent;
++};
++
++static int au_cpup_before_link(struct dentry *src_dentry,
++ struct au_link_args *a)
++{
++ int err;
++ struct dentry *h_src_dentry;
++ struct mutex *h_mtx;
++
++ di_read_lock_parent(a->src_parent, AuLock_IR);
++ err = au_test_and_cpup_dirs(src_dentry, a->bdst);
++ if (unlikely(err))
++ goto out;
++
++ h_src_dentry = au_h_dptr(src_dentry, a->bsrc);
++ h_mtx = &h_src_dentry->d_inode->i_mutex;
++ err = au_pin(&a->pin, src_dentry, a->bdst,
++ au_opt_udba(src_dentry->d_sb),
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ if (unlikely(err))
++ goto out;
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ err = au_sio_cpup_simple(src_dentry, a->bdst, -1,
++ AuCpup_DTIME /* | AuCpup_KEEPLINO */);
++ mutex_unlock(h_mtx);
++ au_unpin(&a->pin);
++
++ out:
++ di_read_unlock(a->src_parent, AuLock_IR);
++ return err;
++}
++
++static int au_cpup_or_link(struct dentry *src_dentry, struct au_link_args *a)
++{
++ int err;
++ unsigned char plink;
++ struct inode *h_inode, *inode;
++ struct dentry *h_src_dentry;
++ struct super_block *sb;
++
++ plink = 0;
++ h_inode = NULL;
++ sb = src_dentry->d_sb;
++ inode = src_dentry->d_inode;
++ if (au_ibstart(inode) <= a->bdst)
++ h_inode = au_h_iptr(inode, a->bdst);
++ if (!h_inode || !h_inode->i_nlink) {
++ /* copyup src_dentry as the name of dentry. */
++ au_set_dbstart(src_dentry, a->bdst);
++ au_set_h_dptr(src_dentry, a->bdst, dget(a->h_path.dentry));
++ h_inode = au_h_dptr(src_dentry, a->bsrc)->d_inode;
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ err = au_sio_cpup_single(src_dentry, a->bdst, a->bsrc, -1,
++ AuCpup_KEEPLINO, a->parent);
++ mutex_unlock(&h_inode->i_mutex);
++ au_set_h_dptr(src_dentry, a->bdst, NULL);
++ au_set_dbstart(src_dentry, a->bsrc);
++ } else {
++ /* the inode of src_dentry already exists on a.bdst branch */
++ h_src_dentry = d_find_alias(h_inode);
++ if (!h_src_dentry && au_plink_test(inode)) {
++ plink = 1;
++ h_src_dentry = au_plink_lkup(inode, a->bdst);
++ err = PTR_ERR(h_src_dentry);
++ if (IS_ERR(h_src_dentry))
++ goto out;
++
++ if (unlikely(!h_src_dentry->d_inode)) {
++ dput(h_src_dentry);
++ h_src_dentry = NULL;
++ }
++
++ }
++ if (h_src_dentry) {
++ err = vfsub_link(h_src_dentry, au_pinned_h_dir(&a->pin),
++ &a->h_path);
++ dput(h_src_dentry);
++ } else {
++ AuIOErr("no dentry found for hi%lu on b%d\n",
++ h_inode->i_ino, a->bdst);
++ err = -EIO;
++ }
++ }
++
++ if (!err && !plink)
++ au_plink_append(inode, a->bdst, a->h_path.dentry);
++
++out:
++ return err;
++}
++
++int aufs_link(struct dentry *src_dentry, struct inode *dir,
++ struct dentry *dentry)
++{
++ int err, rerr;
++ struct au_dtime dt;
++ struct au_link_args *a;
++ struct dentry *wh_dentry, *h_src_dentry;
++ struct inode *inode;
++ struct super_block *sb;
++ struct au_wr_dir_args wr_dir_args = {
++ /* .force_btgt = -1, */
++ .flags = AuWrDir_ADD_ENTRY
++ };
++
++ IMustLock(dir);
++ inode = src_dentry->d_inode;
++ IMustLock(inode);
++
++ err = -ENOENT;
++ if (unlikely(!inode->i_nlink))
++ goto out;
++
++ err = -ENOMEM;
++ a = kzalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ a->parent = dentry->d_parent; /* dir inode is locked */
++ aufs_read_and_write_lock2(dentry, src_dentry, /*AuLock_FLUSH*/0);
++ a->src_parent = dget_parent(src_dentry);
++ wr_dir_args.force_btgt = au_dbstart(src_dentry);
++
++ di_write_lock_parent(a->parent);
++ wr_dir_args.force_btgt = au_wbr(dentry, wr_dir_args.force_btgt);
++ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, src_dentry, &a->pin,
++ &wr_dir_args);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out_unlock;
++
++ err = 0;
++ sb = dentry->d_sb;
++ a->bdst = au_dbstart(dentry);
++ a->h_path.dentry = au_h_dptr(dentry, a->bdst);
++ a->h_path.mnt = au_sbr_mnt(sb, a->bdst);
++ a->bsrc = au_dbstart(src_dentry);
++ if (au_opt_test(au_mntflags(sb), PLINK)) {
++ if (a->bdst < a->bsrc
++ /* && h_src_dentry->d_sb != a->h_path.dentry->d_sb */)
++ err = au_cpup_or_link(src_dentry, a);
++ else {
++ h_src_dentry = au_h_dptr(src_dentry, a->bdst);
++ err = vfsub_link(h_src_dentry, au_pinned_h_dir(&a->pin),
++ &a->h_path);
++ }
++ } else {
++ /*
++ * copyup src_dentry to the branch we process,
++ * and then link(2) to it.
++ */
++ if (a->bdst < a->bsrc
++ /* && h_src_dentry->d_sb != a->h_path.dentry->d_sb */) {
++ au_unpin(&a->pin);
++ di_write_unlock(a->parent);
++ err = au_cpup_before_link(src_dentry, a);
++ di_write_lock_parent(a->parent);
++ if (!err)
++ err = au_pin(&a->pin, dentry, a->bdst,
++ au_opt_udba(sb),
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ if (unlikely(err))
++ goto out_wh;
++ }
++ if (!err) {
++ h_src_dentry = au_h_dptr(src_dentry, a->bdst);
++ err = -ENOENT;
++ if (h_src_dentry && h_src_dentry->d_inode)
++ err = vfsub_link(h_src_dentry,
++ au_pinned_h_dir(&a->pin),
++ &a->h_path);
++ }
++ }
++ if (unlikely(err))
++ goto out_unpin;
++
++ if (wh_dentry) {
++ a->h_path.dentry = wh_dentry;
++ err = au_wh_unlink_dentry(au_pinned_h_dir(&a->pin), &a->h_path,
++ dentry);
++ if (unlikely(err))
++ goto out_revert;
++ }
++
++ dir->i_version++;
++ if (au_ibstart(dir) == au_dbstart(dentry))
++ au_cpup_attr_timesizes(dir);
++ inc_nlink(inode);
++ inode->i_ctime = dir->i_ctime;
++ if (!d_unhashed(a->h_path.dentry))
++ d_instantiate(dentry, au_igrab(inode));
++ else
++ /* some filesystem calls d_drop() */
++ d_drop(dentry);
++ goto out_unpin; /* success */
++
++ out_revert:
++ rerr = vfsub_unlink(au_pinned_h_dir(&a->pin), &a->h_path, /*force*/0);
++ if (!rerr)
++ goto out_dt;
++ AuIOErr("%.*s reverting failed(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ err = -EIO;
++ out_dt:
++ d_drop(dentry);
++ au_dtime_revert(&dt);
++ out_unpin:
++ au_unpin(&a->pin);
++ out_wh:
++ dput(wh_dentry);
++ out_unlock:
++ if (unlikely(err)) {
++ au_update_dbstart(dentry);
++ d_drop(dentry);
++ }
++ di_write_unlock(a->parent);
++ dput(a->src_parent);
++ aufs_read_and_write_unlock2(dentry, src_dentry);
++ kfree(a);
++ out:
++ return err;
++}
++
++int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
++{
++ int err, rerr;
++ aufs_bindex_t bindex;
++ unsigned char diropq;
++ struct path h_path;
++ struct dentry *wh_dentry, *parent, *opq_dentry;
++ struct mutex *h_mtx;
++ struct super_block *sb;
++ struct {
++ struct au_pin pin;
++ struct au_dtime dt;
++ } *a; /* reduce the stack usage */
++ struct au_wr_dir_args wr_dir_args = {
++ .force_btgt = -1,
++ .flags = AuWrDir_ADD_ENTRY | AuWrDir_ISDIR
++ };
++
++ IMustLock(dir);
++
++ err = -ENOMEM;
++ a = kmalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ aufs_read_lock(dentry, AuLock_DW);
++ parent = dentry->d_parent; /* dir inode is locked */
++ di_write_lock_parent(parent);
++ wh_dentry = lock_hdir_lkup_wh(dentry, &a->dt, /*src_dentry*/NULL,
++ &a->pin, &wr_dir_args);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out_free;
++
++ sb = dentry->d_sb;
++ bindex = au_dbstart(dentry);
++ h_path.dentry = au_h_dptr(dentry, bindex);
++ h_path.mnt = au_sbr_mnt(sb, bindex);
++ err = vfsub_mkdir(au_pinned_h_dir(&a->pin), &h_path, mode);
++ if (unlikely(err))
++ goto out_unlock;
++
++ /* make the dir opaque */
++ diropq = 0;
++ h_mtx = &h_path.dentry->d_inode->i_mutex;
++ if (wh_dentry
++ || au_opt_test(au_mntflags(sb), ALWAYS_DIROPQ)) {
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ opq_dentry = au_diropq_create(dentry, bindex);
++ mutex_unlock(h_mtx);
++ err = PTR_ERR(opq_dentry);
++ if (IS_ERR(opq_dentry))
++ goto out_dir;
++ dput(opq_dentry);
++ diropq = 1;
++ }
++
++ err = epilog(dir, bindex, wh_dentry, dentry);
++ if (!err) {
++ inc_nlink(dir);
++ goto out_unlock; /* success */
++ }
++
++ /* revert */
++ if (diropq) {
++ AuLabel(revert opq);
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ rerr = au_diropq_remove(dentry, bindex);
++ mutex_unlock(h_mtx);
++ if (rerr) {
++ AuIOErr("%.*s reverting diropq failed(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ err = -EIO;
++ }
++ }
++
++ out_dir:
++ AuLabel(revert dir);
++ rerr = vfsub_rmdir(au_pinned_h_dir(&a->pin), &h_path);
++ if (rerr) {
++ AuIOErr("%.*s reverting dir failed(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ err = -EIO;
++ }
++ d_drop(dentry);
++ au_dtime_revert(&a->dt);
++ out_unlock:
++ au_unpin(&a->pin);
++ dput(wh_dentry);
++ out_free:
++ if (unlikely(err)) {
++ au_update_dbstart(dentry);
++ d_drop(dentry);
++ }
++ di_write_unlock(parent);
++ aufs_read_unlock(dentry, AuLock_DW);
++ kfree(a);
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/i_op.c linux-2.6.31.5/fs/aufs/i_op.c
+--- linux-2.6.31.5.orig/fs/aufs/i_op.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/i_op.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,872 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode operations (except add/del/rename)
++ */
++
++#include <linux/device_cgroup.h>
++#include <linux/fs_stack.h>
++#include <linux/mm.h>
++#include <linux/namei.h>
++#include <linux/security.h>
++#include <linux/uaccess.h>
++#include "aufs.h"
++
++static int h_permission(struct inode *h_inode, int mask,
++ struct vfsmount *h_mnt, int brperm)
++{
++ int err;
++ const unsigned char write_mask = !!(mask & (MAY_WRITE | MAY_APPEND));
++
++ err = -EACCES;
++ if ((write_mask && IS_IMMUTABLE(h_inode))
++ || ((mask & MAY_EXEC)
++ && S_ISREG(h_inode->i_mode)
++ && ((h_mnt->mnt_flags & MNT_NOEXEC)
++ || !(h_inode->i_mode & S_IXUGO))))
++ goto out;
++
++ /*
++ * - skip the lower fs test in the case of write to ro branch.
++ * - nfs dir permission write check is optimized, but a policy for
++ * link/rename requires a real check.
++ */
++ if ((write_mask && !au_br_writable(brperm))
++ || (au_test_nfs(h_inode->i_sb) && S_ISDIR(h_inode->i_mode)
++ && write_mask && !(mask & MAY_READ))
++ || !h_inode->i_op->permission) {
++ /* AuLabel(generic_permission); */
++ err = generic_permission(h_inode, mask, NULL);
++ } else {
++ /* AuLabel(h_inode->permission); */
++ err = h_inode->i_op->permission(h_inode, mask);
++ AuTraceErr(err);
++ }
++
++ if (!err)
++ err = devcgroup_inode_permission(h_inode, mask);
++ if (!err)
++ err = security_inode_permission
++ (h_inode, mask & (MAY_READ | MAY_WRITE | MAY_EXEC
++ | MAY_APPEND));
++
++ out:
++ return err;
++}
++
++static int aufs_permission(struct inode *inode, int mask)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ const unsigned char isdir = !!S_ISDIR(inode->i_mode);
++ const unsigned char write_mask = !!(mask & (MAY_WRITE | MAY_APPEND));
++ struct inode *h_inode;
++ struct super_block *sb;
++ struct au_branch *br;
++
++ sb = inode->i_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ ii_read_lock_child(inode);
++
++ if (!isdir || write_mask) {
++ h_inode = au_h_iptr(inode, au_ibstart(inode));
++ AuDebugOn(!h_inode
++ || ((h_inode->i_mode & S_IFMT)
++ != (inode->i_mode & S_IFMT)));
++ err = 0;
++ bindex = au_ibstart(inode);
++ br = au_sbr(sb, bindex);
++ err = h_permission(h_inode, mask, br->br_mnt, br->br_perm);
++
++ if (write_mask && !err) {
++ /* test whether the upper writable branch exists */
++ err = -EROFS;
++ for (; bindex >= 0; bindex--)
++ if (!au_br_rdonly(au_sbr(sb, bindex))) {
++ err = 0;
++ break;
++ }
++ }
++ goto out;
++ }
++
++ /* non-write to dir */
++ err = 0;
++ bend = au_ibend(inode);
++ for (bindex = au_ibstart(inode); !err && bindex <= bend; bindex++) {
++ h_inode = au_h_iptr(inode, bindex);
++ if (h_inode) {
++ AuDebugOn(!S_ISDIR(h_inode->i_mode));
++ br = au_sbr(sb, bindex);
++ err = h_permission(h_inode, mask, br->br_mnt,
++ br->br_perm);
++ }
++ }
++
++ out:
++ ii_read_unlock(inode);
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry,
++ struct nameidata *nd)
++{
++ struct dentry *ret, *parent;
++ struct inode *inode, *h_inode;
++ struct mutex *mtx;
++ struct super_block *sb;
++ int err, npositive;
++ aufs_bindex_t bstart;
++
++ /* temporary workaround for a bug in NFSD readdir */
++ if (!au_test_nfsd(current))
++ IMustLock(dir);
++ else
++ WARN_ONCE(!mutex_is_locked(&dir->i_mutex),
++ "a known problem of NFSD readdir since 2.6.28\n");
++
++ sb = dir->i_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_alloc_dinfo(dentry);
++ ret = ERR_PTR(err);
++ if (unlikely(err))
++ goto out;
++
++ parent = dentry->d_parent; /* dir inode is locked */
++ di_read_lock_parent(parent, AuLock_IR);
++ npositive = au_lkup_dentry(dentry, au_dbstart(parent), /*type*/0, nd);
++ di_read_unlock(parent, AuLock_IR);
++ err = npositive;
++ ret = ERR_PTR(err);
++ if (unlikely(err < 0))
++ goto out_unlock;
++
++ inode = NULL;
++ if (npositive) {
++ bstart = au_dbstart(dentry);
++ h_inode = au_h_dptr(dentry, bstart)->d_inode;
++ if (!S_ISDIR(h_inode->i_mode)) {
++ /*
++ * stop 'race'-ing between hardlinks under different
++ * parents.
++ */
++ mtx = &au_sbr(sb, bstart)->br_xino.xi_nondir_mtx;
++ mutex_lock(mtx);
++ inode = au_new_inode(dentry, /*must_new*/0);
++ mutex_unlock(mtx);
++ } else
++ inode = au_new_inode(dentry, /*must_new*/0);
++ ret = (void *)inode;
++ }
++ if (IS_ERR(inode))
++ goto out_unlock;
++
++ ret = d_splice_alias(inode, dentry);
++ if (unlikely(IS_ERR(ret) && inode))
++ ii_write_unlock(inode);
++ au_store_oflag(nd, inode);
++
++ out_unlock:
++ di_write_unlock(dentry);
++ out:
++ si_read_unlock(sb);
++ return ret;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_wr_dir_cpup(struct dentry *dentry, struct dentry *parent,
++ const unsigned char add_entry, aufs_bindex_t bcpup,
++ aufs_bindex_t bstart)
++{
++ int err;
++ struct dentry *h_parent;
++ struct inode *h_dir;
++
++ if (add_entry) {
++ au_update_dbstart(dentry);
++ IMustLock(parent->d_inode);
++ } else
++ di_write_lock_parent(parent);
++
++ err = 0;
++ if (!au_h_dptr(parent, bcpup)) {
++ if (bstart < bcpup)
++ err = au_cpdown_dirs(dentry, bcpup);
++ else
++ err = au_cpup_dirs(dentry, bcpup);
++ }
++ if (!err && add_entry) {
++ h_parent = au_h_dptr(parent, bcpup);
++ h_dir = h_parent->d_inode;
++ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
++ err = au_lkup_neg(dentry, bcpup);
++ /* todo: no unlock here */
++ mutex_unlock(&h_dir->i_mutex);
++ if (bstart < bcpup && au_dbstart(dentry) < 0) {
++ au_set_dbstart(dentry, 0);
++ au_update_dbrange(dentry, /*do_put_zero*/0);
++ }
++ }
++
++ if (!add_entry)
++ di_write_unlock(parent);
++ if (!err)
++ err = bcpup; /* success */
++
++ return err;
++}
++
++/*
++ * decide the branch and the parent dir where we will create a new entry.
++ * returns new bindex or an error.
++ * copyup the parent dir if needed.
++ */
++int au_wr_dir(struct dentry *dentry, struct dentry *src_dentry,
++ struct au_wr_dir_args *args)
++{
++ int err;
++ aufs_bindex_t bcpup, bstart, src_bstart;
++ const unsigned char add_entry = !!au_ftest_wrdir(args->flags,
++ ADD_ENTRY);
++ struct super_block *sb;
++ struct dentry *parent;
++ struct au_sbinfo *sbinfo;
++
++ sb = dentry->d_sb;
++ sbinfo = au_sbi(sb);
++ parent = dget_parent(dentry);
++ bstart = au_dbstart(dentry);
++ bcpup = bstart;
++ if (args->force_btgt < 0) {
++ if (src_dentry) {
++ src_bstart = au_dbstart(src_dentry);
++ if (src_bstart < bstart)
++ bcpup = src_bstart;
++ } else if (add_entry) {
++ err = AuWbrCreate(sbinfo, dentry,
++ au_ftest_wrdir(args->flags, ISDIR));
++ bcpup = err;
++ }
++
++ if (bcpup < 0 || au_test_ro(sb, bcpup, dentry->d_inode)) {
++ if (add_entry)
++ err = AuWbrCopyup(sbinfo, dentry);
++ else {
++ if (!IS_ROOT(dentry)) {
++ di_read_lock_parent(parent, !AuLock_IR);
++ err = AuWbrCopyup(sbinfo, dentry);
++ di_read_unlock(parent, !AuLock_IR);
++ } else
++ err = AuWbrCopyup(sbinfo, dentry);
++ }
++ bcpup = err;
++ if (unlikely(err < 0))
++ goto out;
++ }
++ } else {
++ bcpup = args->force_btgt;
++ AuDebugOn(au_test_ro(sb, bcpup, dentry->d_inode));
++ }
++ AuDbg("bstart %d, bcpup %d\n", bstart, bcpup);
++ if (bstart < bcpup)
++ au_update_dbrange(dentry, /*do_put_zero*/1);
++
++ err = bcpup;
++ if (bcpup == bstart)
++ goto out; /* success */
++
++ /* copyup the new parent into the branch we process */
++ err = au_wr_dir_cpup(dentry, parent, add_entry, bcpup, bstart);
++
++ out:
++ dput(parent);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct dentry *au_pinned_h_parent(struct au_pin *pin)
++{
++ if (pin && pin->parent)
++ return au_h_dptr(pin->parent, pin->bindex);
++ return NULL;
++}
++
++void au_unpin(struct au_pin *p)
++{
++ if (au_ftest_pin(p->flags, MNT_WRITE))
++ mnt_drop_write(p->h_mnt);
++ if (!p->hdir)
++ return;
++
++ au_hin_imtx_unlock(p->hdir);
++ if (!au_ftest_pin(p->flags, DI_LOCKED))
++ di_read_unlock(p->parent, AuLock_IR);
++ iput(p->hdir->hi_inode);
++ dput(p->parent);
++ p->parent = NULL;
++ p->hdir = NULL;
++ p->h_mnt = NULL;
++}
++
++int au_do_pin(struct au_pin *p)
++{
++ int err;
++ struct super_block *sb;
++ struct dentry *h_dentry, *h_parent;
++ struct au_branch *br;
++ struct inode *h_dir;
++
++ err = 0;
++ sb = p->dentry->d_sb;
++ br = au_sbr(sb, p->bindex);
++ if (IS_ROOT(p->dentry)) {
++ if (au_ftest_pin(p->flags, MNT_WRITE)) {
++ p->h_mnt = br->br_mnt;
++ err = mnt_want_write(p->h_mnt);
++ if (unlikely(err)) {
++ au_fclr_pin(p->flags, MNT_WRITE);
++ goto out_err;
++ }
++ }
++ goto out;
++ }
++
++ h_dentry = NULL;
++ if (p->bindex <= au_dbend(p->dentry))
++ h_dentry = au_h_dptr(p->dentry, p->bindex);
++
++ p->parent = dget_parent(p->dentry);
++ if (!au_ftest_pin(p->flags, DI_LOCKED))
++ di_read_lock(p->parent, AuLock_IR, p->lsc_di);
++
++ h_dir = NULL;
++ h_parent = au_h_dptr(p->parent, p->bindex);
++ p->hdir = au_hi(p->parent->d_inode, p->bindex);
++ if (p->hdir)
++ h_dir = p->hdir->hi_inode;
++
++ /* udba case */
++ if (unlikely(!p->hdir || !h_dir)) {
++ if (!au_ftest_pin(p->flags, DI_LOCKED))
++ di_read_unlock(p->parent, AuLock_IR);
++ dput(p->parent);
++ p->parent = NULL;
++ goto out_err;
++ }
++
++ au_igrab(h_dir);
++ au_hin_imtx_lock_nested(p->hdir, p->lsc_hi);
++
++ if (unlikely(p->hdir->hi_inode != h_parent->d_inode)) {
++ err = -EBUSY;
++ goto out_unpin;
++ }
++ if (h_dentry) {
++ err = au_h_verify(h_dentry, p->udba, h_dir, h_parent, br);
++ if (unlikely(err)) {
++ au_fclr_pin(p->flags, MNT_WRITE);
++ goto out_unpin;
++ }
++ }
++
++ if (au_ftest_pin(p->flags, MNT_WRITE)) {
++ p->h_mnt = br->br_mnt;
++ err = mnt_want_write(p->h_mnt);
++ if (unlikely(err)) {
++ au_fclr_pin(p->flags, MNT_WRITE);
++ goto out_unpin;
++ }
++ }
++ goto out; /* success */
++
++ out_unpin:
++ au_unpin(p);
++ out_err:
++ AuErr("err %d\n", err);
++ err = au_busy_or_stale();
++ out:
++ return err;
++}
++
++void au_pin_init(struct au_pin *p, struct dentry *dentry,
++ aufs_bindex_t bindex, int lsc_di, int lsc_hi,
++ unsigned int udba, unsigned char flags)
++{
++ p->dentry = dentry;
++ p->udba = udba;
++ p->lsc_di = lsc_di;
++ p->lsc_hi = lsc_hi;
++ p->flags = flags;
++ p->bindex = bindex;
++
++ p->parent = NULL;
++ p->hdir = NULL;
++ p->h_mnt = NULL;
++}
++
++int au_pin(struct au_pin *pin, struct dentry *dentry, aufs_bindex_t bindex,
++ unsigned int udba, unsigned char flags)
++{
++ au_pin_init(pin, dentry, bindex, AuLsc_DI_PARENT, AuLsc_I_PARENT2,
++ udba, flags);
++ return au_do_pin(pin);
++}
++
++/* ---------------------------------------------------------------------- */
++
++#define AuIcpup_DID_CPUP 1
++#define au_ftest_icpup(flags, name) ((flags) & AuIcpup_##name)
++#define au_fset_icpup(flags, name) { (flags) |= AuIcpup_##name; }
++#define au_fclr_icpup(flags, name) { (flags) &= ~AuIcpup_##name; }
++
++struct au_icpup_args {
++ unsigned char flags;
++ unsigned char pin_flags;
++ aufs_bindex_t btgt;
++ struct au_pin pin;
++ struct path h_path;
++ struct inode *h_inode;
++};
++
++static int au_lock_and_icpup(struct dentry *dentry, struct iattr *ia,
++ struct au_icpup_args *a)
++{
++ int err;
++ unsigned int udba;
++ loff_t sz;
++ aufs_bindex_t bstart;
++ struct dentry *hi_wh, *parent;
++ struct inode *inode;
++ struct au_wr_dir_args wr_dir_args = {
++ .force_btgt = -1,
++ .flags = 0
++ };
++
++ di_write_lock_child(dentry);
++ bstart = au_dbstart(dentry);
++ inode = dentry->d_inode;
++ if (S_ISDIR(inode->i_mode))
++ au_fset_wrdir(wr_dir_args.flags, ISDIR);
++ /* plink or hi_wh() case */
++ if (bstart != au_ibstart(inode))
++ wr_dir_args.force_btgt = au_ibstart(inode);
++ err = au_wr_dir(dentry, /*src_dentry*/NULL, &wr_dir_args);
++ if (unlikely(err < 0))
++ goto out_dentry;
++ a->btgt = err;
++ if (err != bstart)
++ au_fset_icpup(a->flags, DID_CPUP);
++
++ err = 0;
++ a->pin_flags = AuPin_MNT_WRITE;
++ parent = NULL;
++ if (!IS_ROOT(dentry)) {
++ au_fset_pin(a->pin_flags, DI_LOCKED);
++ parent = dget_parent(dentry);
++ di_write_lock_parent(parent);
++ }
++
++ udba = au_opt_udba(dentry->d_sb);
++ if (d_unhashed(dentry) || (ia->ia_valid & ATTR_FILE))
++ udba = AuOpt_UDBA_NONE;
++ err = au_pin(&a->pin, dentry, a->btgt, udba, a->pin_flags);
++ if (unlikely(err)) {
++ if (parent) {
++ di_write_unlock(parent);
++ dput(parent);
++ }
++ goto out_dentry;
++ }
++ a->h_path.dentry = au_h_dptr(dentry, bstart);
++ a->h_inode = a->h_path.dentry->d_inode;
++ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
++ sz = -1;
++ if ((ia->ia_valid & ATTR_SIZE) && ia->ia_size < i_size_read(a->h_inode))
++ sz = ia->ia_size;
++
++ hi_wh = NULL;
++ if (au_ftest_icpup(a->flags, DID_CPUP) && d_unhashed(dentry)) {
++ hi_wh = au_hi_wh(inode, a->btgt);
++ if (!hi_wh) {
++ err = au_sio_cpup_wh(dentry, a->btgt, sz, /*file*/NULL);
++ if (unlikely(err))
++ goto out_unlock;
++ hi_wh = au_hi_wh(inode, a->btgt);
++ /* todo: revalidate hi_wh? */
++ }
++ }
++
++ if (parent) {
++ au_pin_set_parent_lflag(&a->pin, /*lflag*/0);
++ di_downgrade_lock(parent, AuLock_IR);
++ dput(parent);
++ }
++ if (!au_ftest_icpup(a->flags, DID_CPUP))
++ goto out; /* success */
++
++ if (!d_unhashed(dentry)) {
++ err = au_sio_cpup_simple(dentry, a->btgt, sz, AuCpup_DTIME);
++ if (!err)
++ a->h_path.dentry = au_h_dptr(dentry, a->btgt);
++ } else if (!hi_wh)
++ a->h_path.dentry = au_h_dptr(dentry, a->btgt);
++ else
++ a->h_path.dentry = hi_wh; /* do not dget here */
++
++ out_unlock:
++ mutex_unlock(&a->h_inode->i_mutex);
++ a->h_inode = a->h_path.dentry->d_inode;
++ if (!err) {
++ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
++ goto out; /* success */
++ }
++
++ au_unpin(&a->pin);
++
++ out_dentry:
++ di_write_unlock(dentry);
++ out:
++ return err;
++}
++
++static int aufs_setattr(struct dentry *dentry, struct iattr *ia)
++{
++ int err;
++ struct inode *inode;
++ struct super_block *sb;
++ struct file *file;
++ struct au_icpup_args *a;
++
++ err = -ENOMEM;
++ a = kzalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ inode = dentry->d_inode;
++ IMustLock(inode);
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++
++ file = NULL;
++ if (ia->ia_valid & ATTR_FILE) {
++ /* currently ftruncate(2) only */
++ file = ia->ia_file;
++ fi_write_lock(file);
++ ia->ia_file = au_h_fptr(file, au_fbstart(file));
++ }
++
++ if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
++ ia->ia_valid &= ~ATTR_MODE;
++
++ err = au_lock_and_icpup(dentry, ia, a);
++ if (unlikely(err < 0))
++ goto out_si;
++ if (au_ftest_icpup(a->flags, DID_CPUP)) {
++ ia->ia_file = NULL;
++ ia->ia_valid &= ~ATTR_FILE;
++ }
++
++ a->h_path.mnt = au_sbr_mnt(sb, a->btgt);
++ if (ia->ia_valid & ATTR_SIZE) {
++ struct file *f;
++
++ if (ia->ia_size < i_size_read(inode)) {
++ /* unmap only */
++ err = vmtruncate(inode, ia->ia_size);
++ if (unlikely(err))
++ goto out_unlock;
++ }
++
++ f = NULL;
++ if (ia->ia_valid & ATTR_FILE)
++ f = ia->ia_file;
++ mutex_unlock(&a->h_inode->i_mutex);
++ err = vfsub_trunc(&a->h_path, ia->ia_size, ia->ia_valid, f);
++ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
++ } else
++ err = vfsub_notify_change(&a->h_path, ia);
++ if (!err)
++ au_cpup_attr_changeable(inode);
++
++ out_unlock:
++ mutex_unlock(&a->h_inode->i_mutex);
++ au_unpin(&a->pin);
++ di_write_unlock(dentry);
++ out_si:
++ if (file) {
++ fi_write_unlock(file);
++ ia->ia_file = file;
++ ia->ia_valid |= ATTR_FILE;
++ }
++ si_read_unlock(sb);
++ kfree(a);
++ out:
++ return err;
++}
++
++static int au_getattr_lock_reval(struct dentry *dentry, unsigned int sigen)
++{
++ int err;
++ struct inode *inode;
++ struct dentry *parent;
++
++ err = 0;
++ inode = dentry->d_inode;
++ di_write_lock_child(dentry);
++ if (au_digen(dentry) != sigen || au_iigen(inode) != sigen) {
++ parent = dget_parent(dentry);
++ di_read_lock_parent(parent, AuLock_IR);
++ /* returns a number of positive dentries */
++ err = au_refresh_hdentry(dentry, inode->i_mode & S_IFMT);
++ if (err > 0)
++ err = au_refresh_hinode(inode, dentry);
++ di_read_unlock(parent, AuLock_IR);
++ dput(parent);
++ if (unlikely(!err))
++ err = -EIO;
++ }
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (unlikely(err))
++ di_read_unlock(dentry, AuLock_IR);
++
++ return err;
++}
++
++static void au_refresh_iattr(struct inode *inode, struct kstat *st,
++ unsigned int nlink)
++{
++ inode->i_mode = st->mode;
++ inode->i_uid = st->uid;
++ inode->i_gid = st->gid;
++ inode->i_atime = st->atime;
++ inode->i_mtime = st->mtime;
++ inode->i_ctime = st->ctime;
++
++ au_cpup_attr_nlink(inode, /*force*/0);
++ if (S_ISDIR(inode->i_mode)) {
++ inode->i_nlink -= nlink;
++ inode->i_nlink += st->nlink;
++ }
++
++ spin_lock(&inode->i_lock);
++ inode->i_blocks = st->blocks;
++ i_size_write(inode, st->size);
++ spin_unlock(&inode->i_lock);
++}
++
++static int aufs_getattr(struct vfsmount *mnt __maybe_unused,
++ struct dentry *dentry, struct kstat *st)
++{
++ int err;
++ unsigned int mnt_flags;
++ aufs_bindex_t bindex;
++ unsigned char udba_none, positive;
++ struct super_block *sb, *h_sb;
++ struct inode *inode;
++ struct vfsmount *h_mnt;
++ struct dentry *h_dentry;
++
++ err = 0;
++ sb = dentry->d_sb;
++ inode = dentry->d_inode;
++ si_read_lock(sb, AuLock_FLUSH);
++ mnt_flags = au_mntflags(sb);
++ udba_none = !!au_opt_test(mnt_flags, UDBA_NONE);
++
++ /* support fstat(2) */
++ if (!d_unhashed(dentry) && !udba_none) {
++ unsigned int sigen = au_sigen(sb);
++ if (au_digen(dentry) == sigen && au_iigen(inode) == sigen)
++ di_read_lock_child(dentry, AuLock_IR);
++ else {
++ AuDebugOn(!IS_ROOT(dentry));
++ err = au_getattr_lock_reval(dentry, sigen);
++ if (unlikely(err))
++ goto out;
++ }
++ } else
++ di_read_lock_child(dentry, AuLock_IR);
++
++ bindex = au_ibstart(inode);
++ h_mnt = au_sbr_mnt(sb, bindex);
++ h_sb = h_mnt->mnt_sb;
++ if (!au_test_fs_bad_iattr(h_sb) && udba_none)
++ goto out_fill; /* success */
++
++ h_dentry = NULL;
++ if (au_dbstart(dentry) == bindex)
++ h_dentry = dget(au_h_dptr(dentry, bindex));
++ else if (au_opt_test(mnt_flags, PLINK) && au_plink_test(inode)) {
++ h_dentry = au_plink_lkup(inode, bindex);
++ if (IS_ERR(h_dentry))
++ goto out_fill; /* pretending success */
++ }
++ /* illegally overlapped or something */
++ if (unlikely(!h_dentry))
++ goto out_fill; /* pretending success */
++
++ positive = !!h_dentry->d_inode;
++ if (positive)
++ err = vfs_getattr(h_mnt, h_dentry, st);
++ dput(h_dentry);
++ if (!err) {
++ if (positive)
++ au_refresh_iattr(inode, st, h_dentry->d_inode->i_nlink);
++ goto out_fill; /* success */
++ }
++ goto out_unlock;
++
++ out_fill:
++ generic_fillattr(inode, st);
++ out_unlock:
++ di_read_unlock(dentry, AuLock_IR);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int h_readlink(struct dentry *dentry, int bindex, char __user *buf,
++ int bufsiz)
++{
++ int err;
++ struct super_block *sb;
++ struct dentry *h_dentry;
++
++ err = -EINVAL;
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (unlikely(/* !h_dentry
++ || !h_dentry->d_inode
++ || !h_dentry->d_inode->i_op
++ || */ !h_dentry->d_inode->i_op->readlink))
++ goto out;
++
++ err = security_inode_readlink(h_dentry);
++ if (unlikely(err))
++ goto out;
++
++ sb = dentry->d_sb;
++ if (!au_test_ro(sb, bindex, dentry->d_inode)) {
++ vfsub_touch_atime(au_sbr_mnt(sb, bindex), h_dentry);
++ fsstack_copy_attr_atime(dentry->d_inode, h_dentry->d_inode);
++ }
++ err = h_dentry->d_inode->i_op->readlink(h_dentry, buf, bufsiz);
++
++ out:
++ return err;
++}
++
++static int aufs_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
++{
++ int err;
++
++ aufs_read_lock(dentry, AuLock_IR);
++ err = h_readlink(dentry, au_dbstart(dentry), buf, bufsiz);
++ aufs_read_unlock(dentry, AuLock_IR);
++
++ return err;
++}
++
++static void *aufs_follow_link(struct dentry *dentry, struct nameidata *nd)
++{
++ int err;
++ char *buf;
++ mm_segment_t old_fs;
++
++ err = -ENOMEM;
++ buf = __getname();
++ if (unlikely(!buf))
++ goto out;
++
++ aufs_read_lock(dentry, AuLock_IR);
++ old_fs = get_fs();
++ set_fs(KERNEL_DS);
++ err = h_readlink(dentry, au_dbstart(dentry), (char __user *)buf,
++ PATH_MAX);
++ set_fs(old_fs);
++ aufs_read_unlock(dentry, AuLock_IR);
++
++ if (err >= 0) {
++ buf[err] = 0;
++ /* will be freed by put_link */
++ nd_set_link(nd, buf);
++ return NULL; /* success */
++ }
++ __putname(buf);
++
++ out:
++ path_put(&nd->path);
++ AuTraceErr(err);
++ return ERR_PTR(err);
++}
++
++static void aufs_put_link(struct dentry *dentry __maybe_unused,
++ struct nameidata *nd, void *cookie __maybe_unused)
++{
++ __putname(nd_get_link(nd));
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void aufs_truncate_range(struct inode *inode __maybe_unused,
++ loff_t start __maybe_unused,
++ loff_t end __maybe_unused)
++{
++ AuUnsupport();
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct inode_operations aufs_symlink_iop = {
++ .permission = aufs_permission,
++ .setattr = aufs_setattr,
++ .getattr = aufs_getattr,
++ .readlink = aufs_readlink,
++ .follow_link = aufs_follow_link,
++ .put_link = aufs_put_link
++};
++
++struct inode_operations aufs_dir_iop = {
++ .create = aufs_create,
++ .lookup = aufs_lookup,
++ .link = aufs_link,
++ .unlink = aufs_unlink,
++ .symlink = aufs_symlink,
++ .mkdir = aufs_mkdir,
++ .rmdir = aufs_rmdir,
++ .mknod = aufs_mknod,
++ .rename = aufs_rename,
++
++ .permission = aufs_permission,
++ .setattr = aufs_setattr,
++ .getattr = aufs_getattr
++};
++
++struct inode_operations aufs_iop = {
++ .permission = aufs_permission,
++ .setattr = aufs_setattr,
++ .getattr = aufs_getattr,
++ .truncate_range = aufs_truncate_range
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/i_op_del.c linux-2.6.31.5/fs/aufs/i_op_del.c
+--- linux-2.6.31.5.orig/fs/aufs/i_op_del.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/i_op_del.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,468 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode operations (del entry)
++ */
++
++#include "aufs.h"
++
++/*
++ * decide if a new whiteout for @dentry is necessary or not.
++ * when it is necessary, prepare the parent dir for the upper branch whose
++ * branch index is @bcpup for creation. the actual creation of the whiteout will
++ * be done by caller.
++ * return value:
++ * 0: wh is unnecessary
++ * plus: wh is necessary
++ * minus: error
++ */
++int au_wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup)
++{
++ int need_wh, err;
++ aufs_bindex_t bstart;
++ struct super_block *sb;
++
++ sb = dentry->d_sb;
++ bstart = au_dbstart(dentry);
++ if (*bcpup < 0) {
++ *bcpup = bstart;
++ if (au_test_ro(sb, bstart, dentry->d_inode)) {
++ err = AuWbrCopyup(au_sbi(sb), dentry);
++ *bcpup = err;
++ if (unlikely(err < 0))
++ goto out;
++ }
++ } else
++ AuDebugOn(bstart < *bcpup
++ || au_test_ro(sb, *bcpup, dentry->d_inode));
++ AuDbg("bcpup %d, bstart %d\n", *bcpup, bstart);
++
++ if (*bcpup != bstart) {
++ err = au_cpup_dirs(dentry, *bcpup);
++ if (unlikely(err))
++ goto out;
++ need_wh = 1;
++ } else {
++ aufs_bindex_t old_bend, new_bend, bdiropq = -1;
++
++ old_bend = au_dbend(dentry);
++ if (isdir) {
++ bdiropq = au_dbdiropq(dentry);
++ au_set_dbdiropq(dentry, -1);
++ }
++ need_wh = au_lkup_dentry(dentry, bstart + 1, /*type*/0,
++ /*nd*/NULL);
++ err = need_wh;
++ if (isdir)
++ au_set_dbdiropq(dentry, bdiropq);
++ if (unlikely(err < 0))
++ goto out;
++ new_bend = au_dbend(dentry);
++ if (!need_wh && old_bend != new_bend) {
++ au_set_h_dptr(dentry, new_bend, NULL);
++ au_set_dbend(dentry, old_bend);
++ }
++ }
++ AuDbg("need_wh %d\n", need_wh);
++ err = need_wh;
++
++ out:
++ return err;
++}
++
++/*
++ * simple tests for the del-entry operations.
++ * following the checks in vfs, plus the parent-child relationship.
++ */
++int au_may_del(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent, int isdir)
++{
++ int err;
++ umode_t h_mode;
++ struct dentry *h_dentry, *h_latest;
++ struct inode *h_inode;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ h_inode = h_dentry->d_inode;
++ if (dentry->d_inode) {
++ err = -ENOENT;
++ if (unlikely(!h_inode || !h_inode->i_nlink))
++ goto out;
++
++ h_mode = h_inode->i_mode;
++ if (!isdir) {
++ err = -EISDIR;
++ if (unlikely(S_ISDIR(h_mode)))
++ goto out;
++ } else if (unlikely(!S_ISDIR(h_mode))) {
++ err = -ENOTDIR;
++ goto out;
++ }
++ } else {
++ /* rename(2) case */
++ err = -EIO;
++ if (unlikely(h_inode))
++ goto out;
++ }
++
++ err = -ENOENT;
++ /* expected parent dir is locked */
++ if (unlikely(h_parent != h_dentry->d_parent))
++ goto out;
++ err = 0;
++
++ /*
++ * rmdir a dir may break the consistency on some filesystem.
++ * let's try heavy test.
++ */
++ err = -EACCES;
++ if (unlikely(au_test_h_perm(h_parent->d_inode, MAY_EXEC | MAY_WRITE)))
++ goto out;
++
++ h_latest = au_sio_lkup_one(&dentry->d_name, h_parent,
++ au_sbr(dentry->d_sb, bindex));
++ err = -EIO;
++ if (IS_ERR(h_latest))
++ goto out;
++ if (h_latest == h_dentry)
++ err = 0;
++ dput(h_latest);
++
++ out:
++ return err;
++}
++
++/*
++ * decide the branch where we operate for @dentry. the branch index will be set
++ * @rbcpup. after diciding it, 'pin' it and store the timestamps of the parent
++ * dir for reverting.
++ * when a new whiteout is necessary, create it.
++ */
++static struct dentry*
++lock_hdir_create_wh(struct dentry *dentry, int isdir, aufs_bindex_t *rbcpup,
++ struct au_dtime *dt, struct au_pin *pin)
++{
++ struct dentry *wh_dentry;
++ struct super_block *sb;
++ struct path h_path;
++ int err, need_wh;
++ unsigned int udba;
++ aufs_bindex_t bcpup;
++
++ need_wh = au_wr_dir_need_wh(dentry, isdir, rbcpup);
++ wh_dentry = ERR_PTR(need_wh);
++ if (unlikely(need_wh < 0))
++ goto out;
++
++ sb = dentry->d_sb;
++ udba = au_opt_udba(sb);
++ bcpup = *rbcpup;
++ err = au_pin(pin, dentry, bcpup, udba,
++ AuPin_DI_LOCKED | AuPin_MNT_WRITE);
++ wh_dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out;
++
++ h_path.dentry = au_pinned_h_parent(pin);
++ if (udba != AuOpt_UDBA_NONE
++ && au_dbstart(dentry) == bcpup) {
++ err = au_may_del(dentry, bcpup, h_path.dentry, isdir);
++ wh_dentry = ERR_PTR(err);
++ if (unlikely(err))
++ goto out_unpin;
++ }
++
++ h_path.mnt = au_sbr_mnt(sb, bcpup);
++ au_dtime_store(dt, au_pinned_parent(pin), &h_path);
++ wh_dentry = NULL;
++ if (!need_wh)
++ goto out; /* success, no need to create whiteout */
++
++ wh_dentry = au_wh_create(dentry, bcpup, h_path.dentry);
++ if (!IS_ERR(wh_dentry))
++ goto out; /* success */
++ /* returns with the parent is locked and wh_dentry is dget-ed */
++
++ out_unpin:
++ au_unpin(pin);
++ out:
++ return wh_dentry;
++}
++
++/*
++ * when removing a dir, rename it to a unique temporary whiteout-ed name first
++ * in order to be revertible and save time for removing many child whiteouts
++ * under the dir.
++ * returns 1 when there are too many child whiteout and caller should remove
++ * them asynchronously. returns 0 when the number of children is enough small to
++ * remove now or the branch fs is a remote fs.
++ * otherwise return an error.
++ */
++static int renwh_and_rmdir(struct dentry *dentry, aufs_bindex_t bindex,
++ struct au_nhash *whlist, struct inode *dir)
++{
++ int rmdir_later, err, dirwh;
++ struct dentry *h_dentry;
++ struct super_block *sb;
++
++ sb = dentry->d_sb;
++ SiMustAnyLock(sb);
++ h_dentry = au_h_dptr(dentry, bindex);
++ err = au_whtmp_ren(h_dentry, au_sbr(sb, bindex));
++ if (unlikely(err))
++ goto out;
++
++ /* stop monitoring */
++ au_hin_free(au_hi(dentry->d_inode, bindex));
++
++ if (!au_test_fs_remote(h_dentry->d_sb)) {
++ dirwh = au_sbi(sb)->si_dirwh;
++ rmdir_later = (dirwh <= 1);
++ if (!rmdir_later)
++ rmdir_later = au_nhash_test_longer_wh(whlist, bindex,
++ dirwh);
++ if (rmdir_later)
++ return rmdir_later;
++ }
++
++ err = au_whtmp_rmdir(dir, bindex, h_dentry, whlist);
++ if (unlikely(err)) {
++ AuIOErr("rmdir %.*s, b%d failed, %d. ignored\n",
++ AuDLNPair(h_dentry), bindex, err);
++ err = 0;
++ }
++
++ out:
++ return err;
++}
++
++/*
++ * final procedure for deleting a entry.
++ * maintain dentry and iattr.
++ */
++static void epilog(struct inode *dir, struct dentry *dentry,
++ aufs_bindex_t bindex)
++{
++ struct inode *inode;
++
++ inode = dentry->d_inode;
++ d_drop(dentry);
++ inode->i_ctime = dir->i_ctime;
++
++ if (atomic_read(&dentry->d_count) == 1) {
++ au_set_h_dptr(dentry, au_dbstart(dentry), NULL);
++ au_update_dbstart(dentry);
++ }
++ if (au_ibstart(dir) == bindex)
++ au_cpup_attr_timesizes(dir);
++ dir->i_version++;
++}
++
++/*
++ * when an error happened, remove the created whiteout and revert everything.
++ */
++static int do_revert(int err, struct inode *dir, aufs_bindex_t bwh,
++ struct dentry *wh_dentry, struct dentry *dentry,
++ struct au_dtime *dt)
++{
++ int rerr;
++ struct path h_path = {
++ .dentry = wh_dentry,
++ .mnt = au_sbr_mnt(dir->i_sb, bwh)
++ };
++
++ rerr = au_wh_unlink_dentry(au_h_iptr(dir, bwh), &h_path, dentry);
++ if (!rerr) {
++ au_set_dbwh(dentry, bwh);
++ au_dtime_revert(dt);
++ return 0;
++ }
++
++ AuIOErr("%.*s reverting whiteout failed(%d, %d)\n",
++ AuDLNPair(dentry), err, rerr);
++ return -EIO;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int aufs_unlink(struct inode *dir, struct dentry *dentry)
++{
++ int err;
++ aufs_bindex_t bwh, bindex, bstart;
++ struct au_dtime dt;
++ struct au_pin pin;
++ struct path h_path;
++ struct inode *inode, *h_dir;
++ struct dentry *parent, *wh_dentry;
++
++ IMustLock(dir);
++ inode = dentry->d_inode;
++ if (unlikely(!inode))
++ return -ENOENT; /* possible? */
++ IMustLock(inode);
++
++ aufs_read_lock(dentry, AuLock_DW);
++ parent = dentry->d_parent; /* dir inode is locked */
++ di_write_lock_parent(parent);
++
++ bstart = au_dbstart(dentry);
++ bwh = au_dbwh(dentry);
++ bindex = -1;
++ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt, &pin);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out;
++
++ h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart);
++ h_path.dentry = au_h_dptr(dentry, bstart);
++ dget(h_path.dentry);
++ if (bindex == bstart) {
++ h_dir = au_pinned_h_dir(&pin);
++ err = vfsub_unlink(h_dir, &h_path, /*force*/0);
++ } else {
++ /* dir inode is locked */
++ h_dir = wh_dentry->d_parent->d_inode;
++ IMustLock(h_dir);
++ err = 0;
++ }
++
++ if (!err) {
++ drop_nlink(inode);
++ epilog(dir, dentry, bindex);
++
++ /* update target timestamps */
++ if (bindex == bstart) {
++ vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/
++ inode->i_ctime = h_path.dentry->d_inode->i_ctime;
++ } else
++ /* todo: this timestamp may be reverted later */
++ inode->i_ctime = h_dir->i_ctime;
++ goto out_unlock; /* success */
++ }
++
++ /* revert */
++ if (wh_dentry) {
++ int rerr;
++
++ rerr = do_revert(err, dir, bwh, wh_dentry, dentry, &dt);
++ if (rerr)
++ err = rerr;
++ }
++
++ out_unlock:
++ au_unpin(&pin);
++ dput(wh_dentry);
++ dput(h_path.dentry);
++ out:
++ di_write_unlock(parent);
++ aufs_read_unlock(dentry, AuLock_DW);
++ return err;
++}
++
++int aufs_rmdir(struct inode *dir, struct dentry *dentry)
++{
++ int err, rmdir_later;
++ aufs_bindex_t bwh, bindex, bstart;
++ struct au_dtime dt;
++ struct au_pin pin;
++ struct inode *inode;
++ struct dentry *parent, *wh_dentry, *h_dentry;
++ struct au_whtmp_rmdir *args;
++
++ IMustLock(dir);
++ inode = dentry->d_inode;
++ err = -ENOENT; /* possible? */
++ if (unlikely(!inode))
++ goto out;
++ IMustLock(inode);
++
++ aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH);
++ err = -ENOMEM;
++ args = au_whtmp_rmdir_alloc(dir->i_sb, GFP_NOFS);
++ if (unlikely(!args))
++ goto out_unlock;
++
++ parent = dentry->d_parent; /* dir inode is locked */
++ di_write_lock_parent(parent);
++ err = au_test_empty(dentry, &args->whlist);
++ if (unlikely(err))
++ goto out_args;
++
++ bstart = au_dbstart(dentry);
++ bwh = au_dbwh(dentry);
++ bindex = -1;
++ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/1, &bindex, &dt, &pin);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out_args;
++
++ h_dentry = au_h_dptr(dentry, bstart);
++ dget(h_dentry);
++ rmdir_later = 0;
++ if (bindex == bstart) {
++ err = renwh_and_rmdir(dentry, bstart, &args->whlist, dir);
++ if (err > 0) {
++ rmdir_later = err;
++ err = 0;
++ }
++ } else {
++ /* stop monitoring */
++ au_hin_free(au_hi(inode, bstart));
++
++ /* dir inode is locked */
++ IMustLock(wh_dentry->d_parent->d_inode);
++ err = 0;
++ }
++
++ if (!err) {
++ clear_nlink(inode);
++ au_set_dbdiropq(dentry, -1);
++ epilog(dir, dentry, bindex);
++
++ if (rmdir_later) {
++ au_whtmp_kick_rmdir(dir, bstart, h_dentry, args);
++ args = NULL;
++ }
++
++ goto out_unpin; /* success */
++ }
++
++ /* revert */
++ AuLabel(revert);
++ if (wh_dentry) {
++ int rerr;
++
++ rerr = do_revert(err, dir, bwh, wh_dentry, dentry, &dt);
++ if (rerr)
++ err = rerr;
++ }
++
++ out_unpin:
++ au_unpin(&pin);
++ dput(wh_dentry);
++ dput(h_dentry);
++ out_args:
++ di_write_unlock(parent);
++ if (args)
++ au_whtmp_rmdir_free(args);
++ out_unlock:
++ aufs_read_unlock(dentry, AuLock_DW);
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/i_op_ren.c linux-2.6.31.5/fs/aufs/i_op_ren.c
+--- linux-2.6.31.5.orig/fs/aufs/i_op_ren.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/i_op_ren.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,948 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * inode operation (rename entry)
++ * todo: this is crazy monster
++ */
++
++#include "aufs.h"
++
++enum { AuSRC, AuDST, AuSrcDst };
++enum { AuPARENT, AuCHILD, AuParentChild };
++
++#define AuRen_ISDIR 1
++#define AuRen_ISSAMEDIR (1 << 1)
++#define AuRen_WHSRC (1 << 2)
++#define AuRen_WHDST (1 << 3)
++#define AuRen_MNT_WRITE (1 << 4)
++#define AuRen_DT_DSTDIR (1 << 5)
++#define AuRen_DIROPQ (1 << 6)
++#define AuRen_CPUP (1 << 7)
++#define au_ftest_ren(flags, name) ((flags) & AuRen_##name)
++#define au_fset_ren(flags, name) { (flags) |= AuRen_##name; }
++#define au_fclr_ren(flags, name) { (flags) &= ~AuRen_##name; }
++
++struct au_ren_args {
++ struct {
++ struct dentry *dentry, *h_dentry, *parent, *h_parent,
++ *wh_dentry;
++ struct inode *dir, *inode;
++ struct au_hinode *hdir;
++ struct au_dtime dt[AuParentChild];
++ aufs_bindex_t bstart;
++ } sd[AuSrcDst];
++
++#define src_dentry sd[AuSRC].dentry
++#define src_dir sd[AuSRC].dir
++#define src_inode sd[AuSRC].inode
++#define src_h_dentry sd[AuSRC].h_dentry
++#define src_parent sd[AuSRC].parent
++#define src_h_parent sd[AuSRC].h_parent
++#define src_wh_dentry sd[AuSRC].wh_dentry
++#define src_hdir sd[AuSRC].hdir
++#define src_h_dir sd[AuSRC].hdir->hi_inode
++#define src_dt sd[AuSRC].dt
++#define src_bstart sd[AuSRC].bstart
++
++#define dst_dentry sd[AuDST].dentry
++#define dst_dir sd[AuDST].dir
++#define dst_inode sd[AuDST].inode
++#define dst_h_dentry sd[AuDST].h_dentry
++#define dst_parent sd[AuDST].parent
++#define dst_h_parent sd[AuDST].h_parent
++#define dst_wh_dentry sd[AuDST].wh_dentry
++#define dst_hdir sd[AuDST].hdir
++#define dst_h_dir sd[AuDST].hdir->hi_inode
++#define dst_dt sd[AuDST].dt
++#define dst_bstart sd[AuDST].bstart
++
++ struct dentry *h_trap;
++ struct au_branch *br;
++ struct au_hinode *src_hinode;
++ struct path h_path;
++ struct au_nhash whlist;
++ aufs_bindex_t btgt;
++
++ unsigned int flags;
++
++ struct au_whtmp_rmdir *thargs;
++ struct dentry *h_dst;
++};
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * functions for reverting.
++ * when an error happened in a single rename systemcall, we should revert
++ * everything as if nothing happend.
++ * we don't need to revert the copied-up/down the parent dir since they are
++ * harmless.
++ */
++
++#define RevertFailure(fmt, args...) do { \
++ AuIOErr("revert failure: " fmt " (%d, %d)\n", \
++ ##args, err, rerr); \
++ err = -EIO; \
++} while (0)
++
++static void au_ren_rev_diropq(int err, struct au_ren_args *a)
++{
++ int rerr;
++
++ au_hin_imtx_lock_nested(a->src_hinode, AuLsc_I_CHILD);
++ rerr = au_diropq_remove(a->src_dentry, a->btgt);
++ au_hin_imtx_unlock(a->src_hinode);
++ if (rerr)
++ RevertFailure("remove diropq %.*s", AuDLNPair(a->src_dentry));
++}
++
++
++static void au_ren_rev_rename(int err, struct au_ren_args *a)
++{
++ int rerr;
++
++ a->h_path.dentry = au_lkup_one(&a->src_dentry->d_name, a->src_h_parent,
++ a->br, /*nd*/NULL);
++ rerr = PTR_ERR(a->h_path.dentry);
++ if (IS_ERR(a->h_path.dentry)) {
++ RevertFailure("au_lkup_one %.*s", AuDLNPair(a->src_dentry));
++ return;
++ }
++
++ rerr = vfsub_rename(a->dst_h_dir,
++ au_h_dptr(a->src_dentry, a->btgt),
++ a->src_h_dir, &a->h_path);
++ d_drop(a->h_path.dentry);
++ dput(a->h_path.dentry);
++ /* au_set_h_dptr(a->src_dentry, a->btgt, NULL); */
++ if (rerr)
++ RevertFailure("rename %.*s", AuDLNPair(a->src_dentry));
++}
++
++static void au_ren_rev_cpup(int err, struct au_ren_args *a)
++{
++ int rerr;
++
++ a->h_path.dentry = a->dst_h_dentry;
++ rerr = vfsub_unlink(a->dst_h_dir, &a->h_path, /*force*/0);
++ au_set_h_dptr(a->src_dentry, a->btgt, NULL);
++ au_set_dbstart(a->src_dentry, a->src_bstart);
++ if (rerr)
++ RevertFailure("unlink %.*s", AuDLNPair(a->dst_h_dentry));
++}
++
++
++static void au_ren_rev_whtmp(int err, struct au_ren_args *a)
++{
++ int rerr;
++
++ a->h_path.dentry = au_lkup_one(&a->dst_dentry->d_name, a->dst_h_parent,
++ a->br, /*nd*/NULL);
++ rerr = PTR_ERR(a->h_path.dentry);
++ if (IS_ERR(a->h_path.dentry)) {
++ RevertFailure("lookup %.*s", AuDLNPair(a->dst_dentry));
++ return;
++ }
++ if (a->h_path.dentry->d_inode) {
++ d_drop(a->h_path.dentry);
++ dput(a->h_path.dentry);
++ return;
++ }
++
++ rerr = vfsub_rename(a->dst_h_dir, a->h_dst, a->dst_h_dir, &a->h_path);
++ d_drop(a->h_path.dentry);
++ dput(a->h_path.dentry);
++ if (!rerr) {
++ au_set_h_dptr(a->dst_dentry, a->btgt, NULL);
++ au_set_h_dptr(a->dst_dentry, a->btgt, dget(a->h_dst));
++ } else
++ RevertFailure("rename %.*s", AuDLNPair(a->h_dst));
++}
++
++static void au_ren_rev_whsrc(int err, struct au_ren_args *a)
++{
++ int rerr;
++
++ a->h_path.dentry = a->src_wh_dentry;
++ rerr = au_wh_unlink_dentry(a->src_h_dir, &a->h_path, a->src_dentry);
++ if (rerr)
++ RevertFailure("unlink %.*s", AuDLNPair(a->src_wh_dentry));
++}
++
++static void au_ren_rev_drop(struct au_ren_args *a)
++{
++ struct dentry *d, *h_d;
++ int i;
++ aufs_bindex_t bend, bindex;
++
++ for (i = 0; i < AuSrcDst; i++) {
++ d = a->sd[i].dentry;
++ d_drop(d);
++ bend = au_dbend(d);
++ for (bindex = au_dbstart(d); bindex <= bend; bindex++) {
++ h_d = au_h_dptr(d, bindex);
++ if (h_d)
++ d_drop(h_d);
++ }
++ }
++
++ au_update_dbstart(a->dst_dentry);
++ if (a->thargs)
++ d_drop(a->h_dst);
++}
++#undef RevertFailure
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * when we have to copyup the renaming entry, do it with the rename-target name
++ * in order to minimize the cost (the later actual rename is unnecessary).
++ * otherwise rename it on the target branch.
++ */
++static int au_ren_or_cpup(struct au_ren_args *a)
++{
++ int err;
++ struct dentry *d;
++
++ d = a->src_dentry;
++ if (au_dbstart(d) == a->btgt) {
++ a->h_path.dentry = a->dst_h_dentry;
++ if (au_ftest_ren(a->flags, DIROPQ)
++ && au_dbdiropq(d) == a->btgt)
++ au_fclr_ren(a->flags, DIROPQ);
++ AuDebugOn(au_dbstart(d) != a->btgt);
++ err = vfsub_rename(a->src_h_dir, au_h_dptr(d, a->btgt),
++ a->dst_h_dir, &a->h_path);
++ } else {
++ struct mutex *h_mtx = &a->src_h_dentry->d_inode->i_mutex;
++
++ au_fset_ren(a->flags, CPUP);
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ au_set_dbstart(d, a->btgt);
++ au_set_h_dptr(d, a->btgt, dget(a->dst_h_dentry));
++ err = au_sio_cpup_single(d, a->btgt, a->src_bstart, -1,
++ !AuCpup_DTIME, a->dst_parent);
++ if (unlikely(err)) {
++ au_set_h_dptr(d, a->btgt, NULL);
++ au_set_dbstart(d, a->src_bstart);
++ }
++ mutex_unlock(h_mtx);
++ }
++
++ return err;
++}
++
++/* cf. aufs_rmdir() */
++static int au_ren_del_whtmp(struct au_ren_args *a)
++{
++ int err;
++ struct inode *dir;
++
++ dir = a->dst_dir;
++ SiMustAnyLock(dir->i_sb);
++ if (!au_nhash_test_longer_wh(&a->whlist, a->btgt,
++ au_sbi(dir->i_sb)->si_dirwh)
++ || au_test_fs_remote(a->h_dst->d_sb)) {
++ err = au_whtmp_rmdir(dir, a->btgt, a->h_dst, &a->whlist);
++ if (unlikely(err))
++ AuWarn("failed removing whtmp dir %.*s (%d), "
++ "ignored.\n", AuDLNPair(a->h_dst), err);
++ } else {
++ au_nhash_wh_free(&a->thargs->whlist);
++ a->thargs->whlist = a->whlist;
++ a->whlist.nh_num = 0;
++ au_whtmp_kick_rmdir(dir, a->btgt, a->h_dst, a->thargs);
++ dput(a->h_dst);
++ a->thargs = NULL;
++ }
++
++ return 0;
++}
++
++/* make it 'opaque' dir. */
++static int au_ren_diropq(struct au_ren_args *a)
++{
++ int err;
++ struct dentry *diropq;
++
++ err = 0;
++ a->src_hinode = au_hi(a->src_inode, a->btgt);
++ au_hin_imtx_lock_nested(a->src_hinode, AuLsc_I_CHILD);
++ diropq = au_diropq_create(a->src_dentry, a->btgt);
++ au_hin_imtx_unlock(a->src_hinode);
++ if (IS_ERR(diropq))
++ err = PTR_ERR(diropq);
++ dput(diropq);
++
++ return err;
++}
++
++static int do_rename(struct au_ren_args *a)
++{
++ int err;
++ struct dentry *d, *h_d;
++
++ /* prepare workqueue args for asynchronous rmdir */
++ h_d = a->dst_h_dentry;
++ if (au_ftest_ren(a->flags, ISDIR) && h_d->d_inode) {
++ err = -ENOMEM;
++ a->thargs = au_whtmp_rmdir_alloc(a->src_dentry->d_sb, GFP_NOFS);
++ if (unlikely(!a->thargs))
++ goto out;
++ a->h_dst = dget(h_d);
++ }
++
++ /* create whiteout for src_dentry */
++ if (au_ftest_ren(a->flags, WHSRC)) {
++ a->src_wh_dentry
++ = au_wh_create(a->src_dentry, a->btgt, a->src_h_parent);
++ err = PTR_ERR(a->src_wh_dentry);
++ if (IS_ERR(a->src_wh_dentry))
++ goto out_thargs;
++ }
++
++ /* lookup whiteout for dentry */
++ if (au_ftest_ren(a->flags, WHDST)) {
++ h_d = au_wh_lkup(a->dst_h_parent, &a->dst_dentry->d_name,
++ a->br);
++ err = PTR_ERR(h_d);
++ if (IS_ERR(h_d))
++ goto out_whsrc;
++ if (!h_d->d_inode)
++ dput(h_d);
++ else
++ a->dst_wh_dentry = h_d;
++ }
++
++ /* rename dentry to tmpwh */
++ if (a->thargs) {
++ err = au_whtmp_ren(a->dst_h_dentry, a->br);
++ if (unlikely(err))
++ goto out_whdst;
++
++ d = a->dst_dentry;
++ au_set_h_dptr(d, a->btgt, NULL);
++ err = au_lkup_neg(d, a->btgt);
++ if (unlikely(err))
++ goto out_whtmp;
++ a->dst_h_dentry = au_h_dptr(d, a->btgt);
++ }
++
++ /* cpup src */
++ if (a->dst_h_dentry->d_inode && a->src_bstart != a->btgt) {
++ struct mutex *h_mtx = &a->src_h_dentry->d_inode->i_mutex;
++
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ err = au_sio_cpup_simple(a->src_dentry, a->btgt, -1,
++ !AuCpup_DTIME);
++ mutex_unlock(h_mtx);
++ if (unlikely(err))
++ goto out_whtmp;
++ }
++
++ /* rename by vfs_rename or cpup */
++ d = a->dst_dentry;
++ if (au_ftest_ren(a->flags, ISDIR)
++ && (a->dst_wh_dentry
++ || au_dbdiropq(d) == a->btgt
++ /* hide the lower to keep xino */
++ || a->btgt < au_dbend(d)
++ || au_opt_test(au_mntflags(d->d_sb), ALWAYS_DIROPQ)))
++ au_fset_ren(a->flags, DIROPQ);
++ err = au_ren_or_cpup(a);
++ if (unlikely(err))
++ /* leave the copied-up one */
++ goto out_whtmp;
++
++ /* make dir opaque */
++ if (au_ftest_ren(a->flags, DIROPQ)) {
++ err = au_ren_diropq(a);
++ if (unlikely(err))
++ goto out_rename;
++ }
++
++ /* update target timestamps */
++ AuDebugOn(au_dbstart(a->src_dentry) != a->btgt);
++ a->h_path.dentry = au_h_dptr(a->src_dentry, a->btgt);
++ vfsub_update_h_iattr(&a->h_path, /*did*/NULL); /*ignore*/
++ a->src_inode->i_ctime = a->h_path.dentry->d_inode->i_ctime;
++
++ /* remove whiteout for dentry */
++ if (a->dst_wh_dentry) {
++ a->h_path.dentry = a->dst_wh_dentry;
++ err = au_wh_unlink_dentry(a->dst_h_dir, &a->h_path,
++ a->dst_dentry);
++ if (unlikely(err))
++ goto out_diropq;
++ }
++
++ /* remove whtmp */
++ if (a->thargs)
++ au_ren_del_whtmp(a); /* ignore this error */
++
++ err = 0;
++ goto out_success;
++
++ out_diropq:
++ if (au_ftest_ren(a->flags, DIROPQ))
++ au_ren_rev_diropq(err, a);
++ out_rename:
++ if (!au_ftest_ren(a->flags, CPUP))
++ au_ren_rev_rename(err, a);
++ else
++ au_ren_rev_cpup(err, a);
++ out_whtmp:
++ if (a->thargs)
++ au_ren_rev_whtmp(err, a);
++ out_whdst:
++ dput(a->dst_wh_dentry);
++ a->dst_wh_dentry = NULL;
++ out_whsrc:
++ if (a->src_wh_dentry)
++ au_ren_rev_whsrc(err, a);
++ au_ren_rev_drop(a);
++ out_success:
++ dput(a->src_wh_dentry);
++ dput(a->dst_wh_dentry);
++ out_thargs:
++ if (a->thargs) {
++ dput(a->h_dst);
++ au_whtmp_rmdir_free(a->thargs);
++ a->thargs = NULL;
++ }
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * test if @dentry dir can be rename destination or not.
++ * success means, it is a logically empty dir.
++ */
++static int may_rename_dstdir(struct dentry *dentry, struct au_nhash *whlist)
++{
++ return au_test_empty(dentry, whlist);
++}
++
++/*
++ * test if @dentry dir can be rename source or not.
++ * if it can, return 0 and @children is filled.
++ * success means,
++ * - it is a logically empty dir.
++ * - or, it exists on writable branch and has no children including whiteouts
++ * on the lower branch.
++ */
++static int may_rename_srcdir(struct dentry *dentry, aufs_bindex_t btgt)
++{
++ int err;
++ aufs_bindex_t bstart;
++
++ bstart = au_dbstart(dentry);
++ if (bstart != btgt) {
++ struct au_nhash whlist;
++
++ SiMustAnyLock(dentry->d_sb);
++ err = au_nhash_alloc(&whlist, au_sbi(dentry->d_sb)->si_rdhash,
++ GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++ err = au_test_empty(dentry, &whlist);
++ au_nhash_wh_free(&whlist);
++ goto out;
++ }
++
++ if (bstart == au_dbtaildir(dentry))
++ return 0; /* success */
++
++ err = au_test_empty_lower(dentry);
++
++ out:
++ if (err == -ENOTEMPTY) {
++ AuWarn1("renaming dir who has child(ren) on multiple branches,"
++ " is not supported\n");
++ err = -EXDEV;
++ }
++ return err;
++}
++
++/* side effect: sets whlist and h_dentry */
++static int au_ren_may_dir(struct au_ren_args *a)
++{
++ int err;
++ struct dentry *d;
++
++ d = a->dst_dentry;
++ SiMustAnyLock(d->d_sb);
++ err = au_nhash_alloc(&a->whlist, au_sbi(d->d_sb)->si_rdhash, GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++
++ err = 0;
++ if (au_ftest_ren(a->flags, ISDIR) && a->dst_inode) {
++ au_set_dbstart(d, a->dst_bstart);
++ err = may_rename_dstdir(d, &a->whlist);
++ au_set_dbstart(d, a->btgt);
++ }
++ a->dst_h_dentry = au_h_dptr(d, au_dbstart(d));
++ if (unlikely(err))
++ goto out;
++
++ d = a->src_dentry;
++ a->src_h_dentry = au_h_dptr(d, au_dbstart(d));
++ if (au_ftest_ren(a->flags, ISDIR)) {
++ err = may_rename_srcdir(d, a->btgt);
++ if (unlikely(err)) {
++ au_nhash_wh_free(&a->whlist);
++ a->whlist.nh_num = 0;
++ }
++ }
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * simple tests for rename.
++ * following the checks in vfs, plus the parent-child relationship.
++ */
++static int au_may_ren(struct au_ren_args *a)
++{
++ int err, isdir;
++ struct inode *h_inode;
++
++ if (a->src_bstart == a->btgt) {
++ err = au_may_del(a->src_dentry, a->btgt, a->src_h_parent,
++ au_ftest_ren(a->flags, ISDIR));
++ if (unlikely(err))
++ goto out;
++ err = -EINVAL;
++ if (unlikely(a->src_h_dentry == a->h_trap))
++ goto out;
++ }
++
++ err = 0;
++ if (a->dst_bstart != a->btgt)
++ goto out;
++
++ err = -EIO;
++ h_inode = a->dst_h_dentry->d_inode;
++ isdir = !!au_ftest_ren(a->flags, ISDIR);
++ if (!a->dst_dentry->d_inode) {
++ if (unlikely(h_inode))
++ goto out;
++ err = au_may_add(a->dst_dentry, a->btgt, a->dst_h_parent,
++ isdir);
++ } else {
++ if (unlikely(!h_inode || !h_inode->i_nlink))
++ goto out;
++ err = au_may_del(a->dst_dentry, a->btgt, a->dst_h_parent,
++ isdir);
++ if (unlikely(err))
++ goto out;
++ err = -ENOTEMPTY;
++ if (unlikely(a->dst_h_dentry == a->h_trap))
++ goto out;
++ err = 0;
++ }
++
++ out:
++ if (unlikely(err == -ENOENT || err == -EEXIST))
++ err = -EIO;
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * locking order
++ * (VFS)
++ * - src_dir and dir by lock_rename()
++ * - inode if exitsts
++ * (aufs)
++ * - lock all
++ * + src_dentry and dentry by aufs_read_and_write_lock2() which calls,
++ * + si_read_lock
++ * + di_write_lock2_child()
++ * + di_write_lock_child()
++ * + ii_write_lock_child()
++ * + di_write_lock_child2()
++ * + ii_write_lock_child2()
++ * + src_parent and parent
++ * + di_write_lock_parent()
++ * + ii_write_lock_parent()
++ * + di_write_lock_parent2()
++ * + ii_write_lock_parent2()
++ * + lower src_dir and dir by vfsub_lock_rename()
++ * + verify the every relationships between child and parent. if any
++ * of them failed, unlock all and return -EBUSY.
++ */
++static void au_ren_unlock(struct au_ren_args *a)
++{
++ struct super_block *sb;
++
++ sb = a->dst_dentry->d_sb;
++ if (au_ftest_ren(a->flags, MNT_WRITE))
++ mnt_drop_write(a->br->br_mnt);
++ vfsub_unlock_rename(a->src_h_parent, a->src_hdir,
++ a->dst_h_parent, a->dst_hdir);
++}
++
++static int au_ren_lock(struct au_ren_args *a)
++{
++ int err;
++ unsigned int udba;
++
++ err = 0;
++ a->src_h_parent = au_h_dptr(a->src_parent, a->btgt);
++ a->src_hdir = au_hi(a->src_dir, a->btgt);
++ a->dst_h_parent = au_h_dptr(a->dst_parent, a->btgt);
++ a->dst_hdir = au_hi(a->dst_dir, a->btgt);
++ a->h_trap = vfsub_lock_rename(a->src_h_parent, a->src_hdir,
++ a->dst_h_parent, a->dst_hdir);
++ udba = au_opt_udba(a->src_dentry->d_sb);
++ if (unlikely(a->src_hdir->hi_inode != a->src_h_parent->d_inode
++ || a->dst_hdir->hi_inode != a->dst_h_parent->d_inode))
++ err = au_busy_or_stale();
++ if (!err && au_dbstart(a->src_dentry) == a->btgt)
++ err = au_h_verify(a->src_h_dentry, udba,
++ a->src_h_parent->d_inode, a->src_h_parent,
++ a->br);
++ if (!err && au_dbstart(a->dst_dentry) == a->btgt)
++ err = au_h_verify(a->dst_h_dentry, udba,
++ a->dst_h_parent->d_inode, a->dst_h_parent,
++ a->br);
++ if (!err) {
++ err = mnt_want_write(a->br->br_mnt);
++ if (unlikely(err))
++ goto out_unlock;
++ au_fset_ren(a->flags, MNT_WRITE);
++ goto out; /* success */
++ }
++
++ err = au_busy_or_stale();
++
++ out_unlock:
++ au_ren_unlock(a);
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void au_ren_refresh_dir(struct au_ren_args *a)
++{
++ struct inode *dir;
++
++ dir = a->dst_dir;
++ dir->i_version++;
++ if (au_ftest_ren(a->flags, ISDIR)) {
++ /* is this updating defined in POSIX? */
++ au_cpup_attr_timesizes(a->src_inode);
++ au_cpup_attr_nlink(dir, /*force*/1);
++ if (a->dst_inode) {
++ clear_nlink(a->dst_inode);
++ au_cpup_attr_timesizes(a->dst_inode);
++ }
++ }
++ if (au_ibstart(dir) == a->btgt)
++ au_cpup_attr_timesizes(dir);
++
++ if (au_ftest_ren(a->flags, ISSAMEDIR))
++ return;
++
++ dir = a->src_dir;
++ dir->i_version++;
++ if (au_ftest_ren(a->flags, ISDIR))
++ au_cpup_attr_nlink(dir, /*force*/1);
++ if (au_ibstart(dir) == a->btgt)
++ au_cpup_attr_timesizes(dir);
++}
++
++static void au_ren_refresh(struct au_ren_args *a)
++{
++ aufs_bindex_t bend, bindex;
++ struct dentry *d, *h_d;
++ struct inode *i, *h_i;
++ struct super_block *sb;
++
++ d = a->src_dentry;
++ au_set_dbwh(d, -1);
++ bend = au_dbend(d);
++ for (bindex = a->btgt + 1; bindex <= bend; bindex++) {
++ h_d = au_h_dptr(d, bindex);
++ if (h_d)
++ au_set_h_dptr(d, bindex, NULL);
++ }
++ au_set_dbend(d, a->btgt);
++
++ sb = d->d_sb;
++ i = a->src_inode;
++ if (au_opt_test(au_mntflags(sb), PLINK) && au_plink_test(i))
++ return; /* success */
++
++ bend = au_ibend(i);
++ for (bindex = a->btgt + 1; bindex <= bend; bindex++) {
++ h_i = au_h_iptr(i, bindex);
++ if (h_i) {
++ au_xino_write(sb, bindex, h_i->i_ino, /*ino*/0);
++ /* ignore this error */
++ au_set_h_iptr(i, bindex, NULL, 0);
++ }
++ }
++ au_set_ibend(i, a->btgt);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* mainly for link(2) and rename(2) */
++int au_wbr(struct dentry *dentry, aufs_bindex_t btgt)
++{
++ aufs_bindex_t bdiropq, bwh;
++ struct dentry *parent;
++ struct au_branch *br;
++
++ parent = dentry->d_parent;
++ IMustLock(parent->d_inode); /* dir is locked */
++
++ bdiropq = au_dbdiropq(parent);
++ bwh = au_dbwh(dentry);
++ br = au_sbr(dentry->d_sb, btgt);
++ if (au_br_rdonly(br)
++ || (0 <= bdiropq && bdiropq < btgt)
++ || (0 <= bwh && bwh < btgt))
++ btgt = -1;
++
++ AuDbg("btgt %d\n", btgt);
++ return btgt;
++}
++
++/* sets src_bstart, dst_bstart and btgt */
++static int au_ren_wbr(struct au_ren_args *a)
++{
++ int err;
++ struct au_wr_dir_args wr_dir_args = {
++ /* .force_btgt = -1, */
++ .flags = AuWrDir_ADD_ENTRY
++ };
++
++ a->src_bstart = au_dbstart(a->src_dentry);
++ a->dst_bstart = au_dbstart(a->dst_dentry);
++ if (au_ftest_ren(a->flags, ISDIR))
++ au_fset_wrdir(wr_dir_args.flags, ISDIR);
++ wr_dir_args.force_btgt = a->src_bstart;
++ if (a->dst_inode && a->dst_bstart < a->src_bstart)
++ wr_dir_args.force_btgt = a->dst_bstart;
++ wr_dir_args.force_btgt = au_wbr(a->dst_dentry, wr_dir_args.force_btgt);
++ err = au_wr_dir(a->dst_dentry, a->src_dentry, &wr_dir_args);
++ a->btgt = err;
++
++ return err;
++}
++
++static void au_ren_dt(struct au_ren_args *a)
++{
++ a->h_path.dentry = a->src_h_parent;
++ au_dtime_store(a->src_dt + AuPARENT, a->src_parent, &a->h_path);
++ if (!au_ftest_ren(a->flags, ISSAMEDIR)) {
++ a->h_path.dentry = a->dst_h_parent;
++ au_dtime_store(a->dst_dt + AuPARENT, a->dst_parent, &a->h_path);
++ }
++
++ au_fclr_ren(a->flags, DT_DSTDIR);
++ if (!au_ftest_ren(a->flags, ISDIR))
++ return;
++
++ a->h_path.dentry = a->src_h_dentry;
++ au_dtime_store(a->src_dt + AuCHILD, a->src_dentry, &a->h_path);
++ if (a->dst_h_dentry->d_inode) {
++ au_fset_ren(a->flags, DT_DSTDIR);
++ a->h_path.dentry = a->dst_h_dentry;
++ au_dtime_store(a->dst_dt + AuCHILD, a->dst_dentry, &a->h_path);
++ }
++}
++
++static void au_ren_rev_dt(int err, struct au_ren_args *a)
++{
++ struct dentry *h_d;
++ struct mutex *h_mtx;
++
++ au_dtime_revert(a->src_dt + AuPARENT);
++ if (!au_ftest_ren(a->flags, ISSAMEDIR))
++ au_dtime_revert(a->dst_dt + AuPARENT);
++
++ if (au_ftest_ren(a->flags, ISDIR) && err != -EIO) {
++ h_d = a->src_dt[AuCHILD].dt_h_path.dentry;
++ h_mtx = &h_d->d_inode->i_mutex;
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ au_dtime_revert(a->src_dt + AuCHILD);
++ mutex_unlock(h_mtx);
++
++ if (au_ftest_ren(a->flags, DT_DSTDIR)) {
++ h_d = a->dst_dt[AuCHILD].dt_h_path.dentry;
++ h_mtx = &h_d->d_inode->i_mutex;
++ mutex_lock_nested(h_mtx, AuLsc_I_CHILD);
++ au_dtime_revert(a->dst_dt + AuCHILD);
++ mutex_unlock(h_mtx);
++ }
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++int aufs_rename(struct inode *_src_dir, struct dentry *_src_dentry,
++ struct inode *_dst_dir, struct dentry *_dst_dentry)
++{
++ int err;
++ /* reduce stack space */
++ struct au_ren_args *a;
++
++ IMustLock(_src_dir);
++ IMustLock(_dst_dir);
++
++ err = -ENOMEM;
++ BUILD_BUG_ON(sizeof(*a) > PAGE_SIZE);
++ a = kzalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ a->src_dir = _src_dir;
++ a->src_dentry = _src_dentry;
++ a->src_inode = a->src_dentry->d_inode;
++ a->src_parent = a->src_dentry->d_parent; /* dir inode is locked */
++ a->dst_dir = _dst_dir;
++ a->dst_dentry = _dst_dentry;
++ a->dst_inode = a->dst_dentry->d_inode;
++ a->dst_parent = a->dst_dentry->d_parent; /* dir inode is locked */
++ if (a->dst_inode) {
++ IMustLock(a->dst_inode);
++ au_igrab(a->dst_inode);
++ }
++
++ err = -ENOTDIR;
++ if (S_ISDIR(a->src_inode->i_mode)) {
++ au_fset_ren(a->flags, ISDIR);
++ if (unlikely(a->dst_inode && !S_ISDIR(a->dst_inode->i_mode)))
++ goto out_free;
++ aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry,
++ AuLock_DIR | AuLock_FLUSH);
++ } else
++ aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry,
++ AuLock_FLUSH);
++
++ au_fset_ren(a->flags, ISSAMEDIR); /* temporary */
++ di_write_lock_parent(a->dst_parent);
++
++ /* which branch we process */
++ err = au_ren_wbr(a);
++ if (unlikely(err < 0))
++ goto out_unlock;
++ a->br = au_sbr(a->dst_dentry->d_sb, a->btgt);
++ a->h_path.mnt = a->br->br_mnt;
++
++ /* are they available to be renamed */
++ err = au_ren_may_dir(a);
++ if (unlikely(err))
++ goto out_unlock;
++
++ /* prepare the writable parent dir on the same branch */
++ if (a->dst_bstart == a->btgt) {
++ au_fset_ren(a->flags, WHDST);
++ } else {
++ err = au_cpup_dirs(a->dst_dentry, a->btgt);
++ if (unlikely(err))
++ goto out_children;
++ }
++
++ if (a->src_dir != a->dst_dir) {
++ /*
++ * this temporary unlock is safe,
++ * because both dir->i_mutex are locked.
++ */
++ di_write_unlock(a->dst_parent);
++ di_write_lock_parent(a->src_parent);
++ err = au_wr_dir_need_wh(a->src_dentry,
++ au_ftest_ren(a->flags, ISDIR),
++ &a->btgt);
++ di_write_unlock(a->src_parent);
++ di_write_lock2_parent(a->src_parent, a->dst_parent, /*isdir*/1);
++ au_fclr_ren(a->flags, ISSAMEDIR);
++ } else
++ err = au_wr_dir_need_wh(a->src_dentry,
++ au_ftest_ren(a->flags, ISDIR),
++ &a->btgt);
++ if (unlikely(err < 0))
++ goto out_children;
++ if (err)
++ au_fset_ren(a->flags, WHSRC);
++
++ /* lock them all */
++ err = au_ren_lock(a);
++ if (unlikely(err))
++ goto out_children;
++
++ if (!au_opt_test(au_mntflags(a->dst_dir->i_sb), UDBA_NONE)) {
++ err = au_may_ren(a);
++ if (unlikely(err))
++ goto out_hdir;
++ }
++
++ /* store timestamps to be revertible */
++ au_ren_dt(a);
++
++ /* here we go */
++ err = do_rename(a);
++ if (unlikely(err))
++ goto out_dt;
++
++ /* update dir attributes */
++ au_ren_refresh_dir(a);
++
++ /* dput/iput all lower dentries */
++ au_ren_refresh(a);
++
++ goto out_hdir; /* success */
++
++ out_dt:
++ au_ren_rev_dt(err, a);
++ out_hdir:
++ au_ren_unlock(a);
++ out_children:
++ au_nhash_wh_free(&a->whlist);
++ out_unlock:
++ if (unlikely(err && au_ftest_ren(a->flags, ISDIR))) {
++ au_update_dbstart(a->dst_dentry);
++ d_drop(a->dst_dentry);
++ }
++ if (!err)
++ d_move(a->src_dentry, a->dst_dentry);
++ if (au_ftest_ren(a->flags, ISSAMEDIR))
++ di_write_unlock(a->dst_parent);
++ else
++ di_write_unlock2(a->src_parent, a->dst_parent);
++ aufs_read_and_write_unlock2(a->dst_dentry, a->src_dentry);
++ out_free:
++ iput(a->dst_inode);
++ if (a->thargs)
++ au_whtmp_rmdir_free(a->thargs);
++ kfree(a);
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/Kconfig linux-2.6.31.5/fs/aufs/Kconfig
+--- linux-2.6.31.5.orig/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/Kconfig 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,132 @@
++config AUFS_FS
++ tristate "Aufs (Advanced multi layered unification filesystem) support"
++ depends on EXPERIMENTAL
++ help
++ Aufs is a stackable unification filesystem such as Unionfs,
++ which unifies several directories and provides a merged single
++ directory.
++ In the early days, aufs was entirely re-designed and
++ re-implemented Unionfs Version 1.x series. Introducing many
++ original ideas, approaches and improvements, it becomes totally
++ different from Unionfs while keeping the basic features.
++
++if AUFS_FS
++choice
++ prompt "Maximum number of branches"
++ default AUFS_BRANCH_MAX_127
++ help
++ Specifies the maximum number of branches (or member directories)
++ in a single aufs. The larger value consumes more system
++ resources and has a minor impact to performance.
++config AUFS_BRANCH_MAX_127
++ bool "127"
++ help
++ Specifies the maximum number of branches (or member directories)
++ in a single aufs. The larger value consumes more system
++ resources and has a minor impact to performance.
++config AUFS_BRANCH_MAX_511
++ bool "511"
++ help
++ Specifies the maximum number of branches (or member directories)
++ in a single aufs. The larger value consumes more system
++ resources and has a minor impact to performance.
++config AUFS_BRANCH_MAX_1023
++ bool "1023"
++ help
++ Specifies the maximum number of branches (or member directories)
++ in a single aufs. The larger value consumes more system
++ resources and has a minor impact to performance.
++config AUFS_BRANCH_MAX_32767
++ bool "32767"
++ help
++ Specifies the maximum number of branches (or member directories)
++ in a single aufs. The larger value consumes more system
++ resources and has a minor impact to performance.
++endchoice
++
++config AUFS_HINOTIFY
++ bool "Use inotify to detect actions on a branch"
++ depends on INOTIFY
++ help
++ If you want to modify files on branches directly, eg. bypassing aufs,
++ and want aufs to detect the changes of them fully, then enable this
++ option and use 'udba=inotify' mount option.
++ It will have a negative impact to the performance.
++ See detail in aufs.5.
++
++config AUFS_EXPORT
++ bool "NFS-exportable aufs"
++ depends on (AUFS_FS = y && EXPORTFS = y) || (AUFS_FS = m && EXPORTFS)
++ help
++ If you want to export your mounted aufs via NFS, then enable this
++ option. There are several requirements for this configuration.
++ See detail in aufs.5.
++
++config AUFS_SHWH
++ bool "Show whiteouts"
++ help
++ If you want to make the whiteouts in aufs visible, then enable
++ this option and specify 'shwh' mount option. Although it may
++ sounds like philosophy or something, but in technically it
++ simply shows the name of whiteout with keeping its behaviour.
++
++config AUFS_BR_RAMFS
++ bool "Ramfs (initramfs/rootfs) as an aufs branch"
++ help
++ If you want to use ramfs as an aufs branch fs, then enable this
++ option. Generally tmpfs is recommended.
++ Aufs prohibited them to be a branch fs by default, because
++ initramfs becomes unusable after switch_root or something
++ generally. If you sets initramfs as an aufs branch and boot your
++ system by switch_root, you will meet a problem easily since the
++ files in initramfs may be inaccessible.
++ Unless you are going to use ramfs as an aufs branch fs without
++ switch_root or something, leave it N.
++
++config AUFS_BR_FUSE
++ bool "Fuse fs as an aufs branch"
++ depends on FUSE_FS
++ select AUFS_POLL
++ help
++ If you want to use fuse-based userspace filesystem as an aufs
++ branch fs, then enable this option.
++ It implements the internal poll(2) operation which is
++ implemented by fuse only (curretnly).
++
++config AUFS_DEBUG
++ bool "Debug aufs"
++ help
++ Enable this to compile aufs internal debug code.
++ It will have a negative impact to the performance.
++
++config AUFS_MAGIC_SYSRQ
++ bool
++ depends on AUFS_DEBUG && MAGIC_SYSRQ
++ default y
++ help
++ Automatic configuration for internal use.
++ When aufs supports Magic SysRq, enabled automatically.
++
++config AUFS_BDEV_LOOP
++ bool
++ depends on BLK_DEV_LOOP
++ default y
++ help
++ Automatic configuration for internal use.
++ Convert =[ym] into =y.
++
++config AUFS_INO_T_64
++ bool
++ depends on AUFS_EXPORT
++ depends on 64BIT && !(ALPHA || S390)
++ default y
++ help
++ Automatic configuration for internal use.
++ /* typedef unsigned long/int __kernel_ino_t */
++ /* alpha and s390x are int */
++
++config AUFS_POLL
++ bool
++ help
++ Automatic configuration for internal use.
++endif
+diff -Nur linux-2.6.31.5.orig/fs/aufs/loop.c linux-2.6.31.5/fs/aufs/loop.c
+--- linux-2.6.31.5.orig/fs/aufs/loop.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/loop.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,55 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * support for loopback block device as a branch
++ */
++
++#include <linux/loop.h>
++#include "aufs.h"
++
++/*
++ * test if two lower dentries have overlapping branches.
++ */
++int au_test_loopback_overlap(struct super_block *sb, struct dentry *h_d1,
++ struct dentry *h_d2)
++{
++ struct inode *h_inode;
++ struct loop_device *l;
++
++ h_inode = h_d1->d_inode;
++ if (MAJOR(h_inode->i_sb->s_dev) != LOOP_MAJOR)
++ return 0;
++
++ l = h_inode->i_sb->s_bdev->bd_disk->private_data;
++ h_d1 = l->lo_backing_file->f_dentry;
++ /* h_d1 can be local NFS. in this case aufs cannot detect the loop */
++ if (unlikely(h_d1->d_sb == sb))
++ return 1;
++ return !!au_test_subdir(h_d1, h_d2);
++}
++
++/* true if a kernel thread named 'loop[0-9].*' accesses a file */
++int au_test_loopback_kthread(void)
++{
++ const char c = current->comm[4];
++
++ return current->mm == NULL
++ && '0' <= c && c <= '9'
++ && strncmp(current->comm, "loop", 4) == 0;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/loop.h linux-2.6.31.5/fs/aufs/loop.h
+--- linux-2.6.31.5.orig/fs/aufs/loop.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/loop.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,51 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * support for loopback mount as a branch
++ */
++
++#ifndef __AUFS_LOOP_H__
++#define __AUFS_LOOP_H__
++
++#ifdef __KERNEL__
++
++struct dentry;
++struct super_block;
++
++#ifdef CONFIG_AUFS_BDEV_LOOP
++/* loop.c */
++int au_test_loopback_overlap(struct super_block *sb, struct dentry *h_d1,
++ struct dentry *h_d2);
++int au_test_loopback_kthread(void);
++#else
++static inline
++int au_test_loopback_overlap(struct super_block *sb, struct dentry *h_d1,
++ struct dentry *h_d2)
++{
++ return 0;
++}
++
++static inline int au_test_loopback_kthread(void)
++{
++ return 0;
++}
++#endif /* BLK_DEV_LOOP */
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_LOOP_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/magic.mk linux-2.6.31.5/fs/aufs/magic.mk
+--- linux-2.6.31.5.orig/fs/aufs/magic.mk 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/magic.mk 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,52 @@
++
++# defined in ${srctree}/fs/fuse/inode.c
++# tristate
++ifdef CONFIG_FUSE_FS
++ccflags-y += -DFUSE_SUPER_MAGIC=0x65735546
++endif
++
++# defined in ${srctree}/fs/ocfs2/ocfs2_fs.h
++# tristate
++ifdef CONFIG_OCFS2_FS
++ccflags-y += -DOCFS2_SUPER_MAGIC=0x7461636f
++endif
++
++# defined in ${srctree}/fs/ocfs2/dlm/userdlm.h
++# tristate
++ifdef CONFIG_OCFS2_FS_O2CB
++ccflags-y += -DDLMFS_MAGIC=0x76a9f425
++endif
++
++# defined in ${srctree}/fs/ramfs/inode.c
++# always true
++ccflags-y += -DRAMFS_MAGIC=0x858458f6
++
++# defined in ${srctree}/fs/cifs/cifsfs.c
++# tristate
++ifdef CONFIG_CIFS_FS
++ccflags-y += -DCIFS_MAGIC_NUMBER=0xFF534D42
++endif
++
++# defined in ${srctree}/fs/xfs/xfs_sb.h
++# tristate
++ifdef CONFIG_XFS_FS
++ccflags-y += -DXFS_SB_MAGIC=0x58465342
++endif
++
++# defined in ${srctree}/fs/configfs/mount.c
++# tristate
++ifdef CONFIG_CONFIGFS_FS
++ccflags-y += -DCONFIGFS_MAGIC=0x62656570
++endif
++
++# defined in ${srctree}/fs/9p/v9fs.h
++# tristate
++ifdef CONFIG_9P_FS
++ccflags-y += -DV9FS_MAGIC=0x01021997
++endif
++
++# defined in ${srctree}/fs/ubifs/ubifs.h
++# tristate
++ifdef CONFIG_UBIFS_FS
++ccflags-y += -DUBIFS_SUPER_MAGIC=0x24051905
++endif
+diff -Nur linux-2.6.31.5.orig/fs/aufs/Makefile linux-2.6.31.5/fs/aufs/Makefile
+--- linux-2.6.31.5.orig/fs/aufs/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/Makefile 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,23 @@
++
++include ${src}/magic.mk
++-include ${src}/priv_def.mk
++
++obj-$(CONFIG_AUFS_FS) += aufs.o
++aufs-y := module.o sbinfo.o super.o branch.o xino.o sysaufs.o opts.o \
++ wkq.o vfsub.o dcsub.o \
++ cpup.o whout.o plink.o wbr_policy.o \
++ dinfo.o dentry.o \
++ finfo.o file.o f_op.o \
++ dir.o vdir.o \
++ iinfo.o inode.o i_op.o i_op_add.o i_op_del.o i_op_ren.o \
++ ioctl.o
++
++# all are boolean
++aufs-$(CONFIG_SYSFS) += sysfs.o
++aufs-$(CONFIG_DEBUG_FS) += dbgaufs.o
++aufs-$(CONFIG_AUFS_BDEV_LOOP) += loop.o
++aufs-$(CONFIG_AUFS_HINOTIFY) += hinotify.o
++aufs-$(CONFIG_AUFS_EXPORT) += export.o
++aufs-$(CONFIG_AUFS_POLL) += poll.o
++aufs-$(CONFIG_AUFS_DEBUG) += debug.o
++aufs-$(CONFIG_AUFS_MAGIC_SYSRQ) += sysrq.o
+diff -Nur linux-2.6.31.5.orig/fs/aufs/module.c linux-2.6.31.5/fs/aufs/module.c
+--- linux-2.6.31.5.orig/fs/aufs/module.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/module.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,173 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * module global variables and operations
++ */
++
++#include <linux/module.h>
++#include <linux/seq_file.h>
++#include "aufs.h"
++
++void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp)
++{
++ if (new_sz <= nused)
++ return p;
++
++ p = krealloc(p, new_sz, gfp);
++ if (p)
++ memset(p + nused, 0, new_sz - nused);
++ return p;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * aufs caches
++ */
++struct kmem_cache *au_cachep[AuCache_Last];
++static int __init au_cache_init(void)
++{
++ au_cachep[AuCache_DINFO] = AuCache(au_dinfo);
++ if (au_cachep[AuCache_DINFO])
++ au_cachep[AuCache_ICNTNR] = AuCache(au_icntnr);
++ if (au_cachep[AuCache_ICNTNR])
++ au_cachep[AuCache_FINFO] = AuCache(au_finfo);
++ if (au_cachep[AuCache_FINFO])
++ au_cachep[AuCache_VDIR] = AuCache(au_vdir);
++ if (au_cachep[AuCache_VDIR])
++ au_cachep[AuCache_DEHSTR] = AuCache(au_vdir_dehstr);
++ if (au_cachep[AuCache_DEHSTR])
++ return 0;
++
++ return -ENOMEM;
++}
++
++static void au_cache_fin(void)
++{
++ int i;
++ for (i = 0; i < AuCache_Last; i++)
++ if (au_cachep[i]) {
++ kmem_cache_destroy(au_cachep[i]);
++ au_cachep[i] = NULL;
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_dir_roflags;
++
++/*
++ * functions for module interface.
++ */
++MODULE_LICENSE("GPL");
++/* MODULE_LICENSE("GPL v2"); */
++MODULE_AUTHOR("Junjiro R. Okajima <aufs-users@lists.sourceforge.net>");
++MODULE_DESCRIPTION(AUFS_NAME
++ " -- Advanced multi layered unification filesystem");
++MODULE_VERSION(AUFS_VERSION);
++
++/* it should be 'byte', but param_set_byte() prints it by "%c" */
++short aufs_nwkq = AUFS_NWKQ_DEF;
++MODULE_PARM_DESC(nwkq, "the number of workqueue thread, " AUFS_WKQ_NAME);
++module_param_named(nwkq, aufs_nwkq, short, S_IRUGO);
++
++/* this module parameter has no meaning when SYSFS is disabled */
++int sysaufs_brs = 1;
++MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/si_*/brN");
++module_param_named(brs, sysaufs_brs, int, S_IRUGO);
++
++/* ---------------------------------------------------------------------- */
++
++static char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */
++
++int au_seq_path(struct seq_file *seq, struct path *path)
++{
++ return seq_path(seq, path, au_esc_chars);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int __init aufs_init(void)
++{
++ int err, i;
++ char *p;
++
++ p = au_esc_chars;
++ for (i = 1; i <= ' '; i++)
++ *p++ = i;
++ *p++ = '\\';
++ *p++ = '\x7f';
++ *p = 0;
++
++ au_dir_roflags = au_file_roflags(O_DIRECTORY | O_LARGEFILE);
++
++ sysaufs_brs_init();
++ au_debug_init();
++
++ err = -EINVAL;
++ if (unlikely(aufs_nwkq <= 0))
++ goto out;
++
++ err = sysaufs_init();
++ if (unlikely(err))
++ goto out;
++ err = au_wkq_init();
++ if (unlikely(err))
++ goto out_sysaufs;
++ err = au_hinotify_init();
++ if (unlikely(err))
++ goto out_wkq;
++ err = au_sysrq_init();
++ if (unlikely(err))
++ goto out_hin;
++ err = au_cache_init();
++ if (unlikely(err))
++ goto out_sysrq;
++ err = register_filesystem(&aufs_fs_type);
++ if (unlikely(err))
++ goto out_cache;
++ pr_info(AUFS_NAME " " AUFS_VERSION "\n");
++ goto out; /* success */
++
++ out_cache:
++ au_cache_fin();
++ out_sysrq:
++ au_sysrq_fin();
++ out_hin:
++ au_hinotify_fin();
++ out_wkq:
++ au_wkq_fin();
++ out_sysaufs:
++ sysaufs_fin();
++ out:
++ return err;
++}
++
++static void __exit aufs_exit(void)
++{
++ unregister_filesystem(&aufs_fs_type);
++ au_cache_fin();
++ au_sysrq_fin();
++ au_hinotify_fin();
++ au_wkq_fin();
++ sysaufs_fin();
++}
++
++module_init(aufs_init);
++module_exit(aufs_exit);
+diff -Nur linux-2.6.31.5.orig/fs/aufs/module.h linux-2.6.31.5/fs/aufs/module.h
+--- linux-2.6.31.5.orig/fs/aufs/module.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/module.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,78 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * module initialization and module-global
++ */
++
++#ifndef __AUFS_MODULE_H__
++#define __AUFS_MODULE_H__
++
++#ifdef __KERNEL__
++
++#include <linux/slab.h>
++
++struct path;
++struct seq_file;
++
++/* module parameters */
++extern short aufs_nwkq;
++extern int sysaufs_brs;
++
++/* ---------------------------------------------------------------------- */
++
++extern int au_dir_roflags;
++
++void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp);
++int au_seq_path(struct seq_file *seq, struct path *path);
++
++/* ---------------------------------------------------------------------- */
++
++/* kmem cache */
++enum {
++ AuCache_DINFO,
++ AuCache_ICNTNR,
++ AuCache_FINFO,
++ AuCache_VDIR,
++ AuCache_DEHSTR,
++#ifdef CONFIG_AUFS_HINOTIFY
++ AuCache_HINOTIFY,
++#endif
++ AuCache_Last
++};
++
++#define AuCache(type) KMEM_CACHE(type, SLAB_RECLAIM_ACCOUNT)
++
++extern struct kmem_cache *au_cachep[];
++
++#define AuCacheFuncs(name, index) \
++static inline void *au_cache_alloc_##name(void) \
++{ return kmem_cache_alloc(au_cachep[AuCache_##index], GFP_NOFS); } \
++static inline void au_cache_free_##name(void *p) \
++{ kmem_cache_free(au_cachep[AuCache_##index], p); }
++
++AuCacheFuncs(dinfo, DINFO);
++AuCacheFuncs(icntnr, ICNTNR);
++AuCacheFuncs(finfo, FINFO);
++AuCacheFuncs(vdir, VDIR);
++AuCacheFuncs(dehstr, DEHSTR);
++
++/* ---------------------------------------------------------------------- */
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_MODULE_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/opts.c linux-2.6.31.5/fs/aufs/opts.c
+--- linux-2.6.31.5.orig/fs/aufs/opts.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/opts.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,1543 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * mount options/flags
++ */
++
++#include <linux/file.h>
++#include <linux/namei.h>
++#include <linux/types.h> /* a distribution requires */
++#include <linux/parser.h>
++#include "aufs.h"
++
++/* ---------------------------------------------------------------------- */
++
++enum {
++ Opt_br,
++ Opt_add, Opt_del, Opt_mod, Opt_reorder, Opt_append, Opt_prepend,
++ Opt_idel, Opt_imod, Opt_ireorder,
++ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash, Opt_rendir,
++ Opt_rdblk_def, Opt_rdhash_def,
++ Opt_xino, Opt_zxino, Opt_noxino,
++ Opt_trunc_xino, Opt_trunc_xino_v, Opt_notrunc_xino,
++ Opt_trunc_xino_path, Opt_itrunc_xino,
++ Opt_trunc_xib, Opt_notrunc_xib,
++ Opt_shwh, Opt_noshwh,
++ Opt_plink, Opt_noplink, Opt_list_plink,
++ Opt_udba,
++ /* Opt_lock, Opt_unlock, */
++ Opt_cmd, Opt_cmd_args,
++ Opt_diropq_a, Opt_diropq_w,
++ Opt_warn_perm, Opt_nowarn_perm,
++ Opt_wbr_copyup, Opt_wbr_create,
++ Opt_refrof, Opt_norefrof,
++ Opt_verbose, Opt_noverbose,
++ Opt_sum, Opt_nosum, Opt_wsum,
++ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err
++};
++
++static match_table_t options = {
++ {Opt_br, "br=%s"},
++ {Opt_br, "br:%s"},
++
++ {Opt_add, "add=%d:%s"},
++ {Opt_add, "add:%d:%s"},
++ {Opt_add, "ins=%d:%s"},
++ {Opt_add, "ins:%d:%s"},
++ {Opt_append, "append=%s"},
++ {Opt_append, "append:%s"},
++ {Opt_prepend, "prepend=%s"},
++ {Opt_prepend, "prepend:%s"},
++
++ {Opt_del, "del=%s"},
++ {Opt_del, "del:%s"},
++ /* {Opt_idel, "idel:%d"}, */
++ {Opt_mod, "mod=%s"},
++ {Opt_mod, "mod:%s"},
++ /* {Opt_imod, "imod:%d:%s"}, */
++
++ {Opt_dirwh, "dirwh=%d"},
++
++ {Opt_xino, "xino=%s"},
++ {Opt_noxino, "noxino"},
++ {Opt_trunc_xino, "trunc_xino"},
++ {Opt_trunc_xino_v, "trunc_xino_v=%d:%d"},
++ {Opt_notrunc_xino, "notrunc_xino"},
++ {Opt_trunc_xino_path, "trunc_xino=%s"},
++ {Opt_itrunc_xino, "itrunc_xino=%d"},
++ /* {Opt_zxino, "zxino=%s"}, */
++ {Opt_trunc_xib, "trunc_xib"},
++ {Opt_notrunc_xib, "notrunc_xib"},
++
++ {Opt_plink, "plink"},
++ {Opt_noplink, "noplink"},
++#ifdef CONFIG_AUFS_DEBUG
++ {Opt_list_plink, "list_plink"},
++#endif
++
++ {Opt_udba, "udba=%s"},
++
++ {Opt_diropq_a, "diropq=always"},
++ {Opt_diropq_a, "diropq=a"},
++ {Opt_diropq_w, "diropq=whiteouted"},
++ {Opt_diropq_w, "diropq=w"},
++
++ {Opt_warn_perm, "warn_perm"},
++ {Opt_nowarn_perm, "nowarn_perm"},
++
++ /* keep them temporary */
++ {Opt_ignore_silent, "coo=%s"},
++ {Opt_ignore_silent, "nodlgt"},
++ {Opt_ignore_silent, "nodirperm1"},
++ {Opt_ignore_silent, "clean_plink"},
++
++#ifdef CONFIG_AUFS_SHWH
++ {Opt_shwh, "shwh"},
++#endif
++ {Opt_noshwh, "noshwh"},
++
++ {Opt_rendir, "rendir=%d"},
++
++ {Opt_refrof, "refrof"},
++ {Opt_norefrof, "norefrof"},
++
++ {Opt_verbose, "verbose"},
++ {Opt_verbose, "v"},
++ {Opt_noverbose, "noverbose"},
++ {Opt_noverbose, "quiet"},
++ {Opt_noverbose, "q"},
++ {Opt_noverbose, "silent"},
++
++ {Opt_sum, "sum"},
++ {Opt_nosum, "nosum"},
++ {Opt_wsum, "wsum"},
++
++ {Opt_rdcache, "rdcache=%d"},
++ {Opt_rdblk, "rdblk=%d"},
++ {Opt_rdblk_def, "rdblk=def"},
++ {Opt_rdhash, "rdhash=%d"},
++ {Opt_rdhash_def, "rdhash=def"},
++
++ {Opt_wbr_create, "create=%s"},
++ {Opt_wbr_create, "create_policy=%s"},
++ {Opt_wbr_copyup, "cpup=%s"},
++ {Opt_wbr_copyup, "copyup=%s"},
++ {Opt_wbr_copyup, "copyup_policy=%s"},
++
++ /* internal use for the scripts */
++ {Opt_ignore_silent, "si=%s"},
++
++ {Opt_br, "dirs=%s"},
++ {Opt_ignore, "debug=%d"},
++ {Opt_ignore, "delete=whiteout"},
++ {Opt_ignore, "delete=all"},
++ {Opt_ignore, "imap=%s"},
++
++ {Opt_err, NULL}
++};
++
++/* ---------------------------------------------------------------------- */
++
++static const char *au_parser_pattern(int val, struct match_token *token)
++{
++ while (token->pattern) {
++ if (token->token == val)
++ return token->pattern;
++ token++;
++ }
++ BUG();
++ return "??";
++}
++
++/* ---------------------------------------------------------------------- */
++
++static match_table_t brperms = {
++ {AuBrPerm_RO, AUFS_BRPERM_RO},
++ {AuBrPerm_RR, AUFS_BRPERM_RR},
++ {AuBrPerm_RW, AUFS_BRPERM_RW},
++
++ {AuBrPerm_ROWH, AUFS_BRPERM_ROWH},
++ {AuBrPerm_RRWH, AUFS_BRPERM_RRWH},
++ {AuBrPerm_RWNoLinkWH, AUFS_BRPERM_RWNLWH},
++
++ {AuBrPerm_ROWH, "nfsro"},
++ {AuBrPerm_RO, NULL}
++};
++
++static int br_perm_val(char *perm)
++{
++ int val;
++ substring_t args[MAX_OPT_ARGS];
++
++ val = match_token(perm, brperms, args);
++ return val;
++}
++
++const char *au_optstr_br_perm(int brperm)
++{
++ return au_parser_pattern(brperm, (void *)brperms);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static match_table_t udbalevel = {
++ {AuOpt_UDBA_REVAL, "reval"},
++ {AuOpt_UDBA_NONE, "none"},
++#ifdef CONFIG_AUFS_HINOTIFY
++ {AuOpt_UDBA_HINOTIFY, "inotify"},
++#endif
++ {-1, NULL}
++};
++
++static int udba_val(char *str)
++{
++ substring_t args[MAX_OPT_ARGS];
++
++ return match_token(str, udbalevel, args);
++}
++
++const char *au_optstr_udba(int udba)
++{
++ return au_parser_pattern(udba, (void *)udbalevel);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static match_table_t au_wbr_create_policy = {
++ {AuWbrCreate_TDP, "tdp"},
++ {AuWbrCreate_TDP, "top-down-parent"},
++ {AuWbrCreate_RR, "rr"},
++ {AuWbrCreate_RR, "round-robin"},
++ {AuWbrCreate_MFS, "mfs"},
++ {AuWbrCreate_MFS, "most-free-space"},
++ {AuWbrCreate_MFSV, "mfs:%d"},
++ {AuWbrCreate_MFSV, "most-free-space:%d"},
++
++ {AuWbrCreate_MFSRR, "mfsrr:%d"},
++ {AuWbrCreate_MFSRRV, "mfsrr:%d:%d"},
++ {AuWbrCreate_PMFS, "pmfs"},
++ {AuWbrCreate_PMFSV, "pmfs:%d"},
++
++ {-1, NULL}
++};
++
++/*
++ * cf. linux/lib/parser.c and cmdline.c
++ * gave up calling memparse() since it uses simple_strtoull() instead of
++ * strict_...().
++ */
++static int au_match_ull(substring_t *s, unsigned long long *result)
++{
++ int err;
++ unsigned int len;
++ char a[32];
++
++ err = -ERANGE;
++ len = s->to - s->from;
++ if (len + 1 <= sizeof(a)) {
++ memcpy(a, s->from, len);
++ a[len] = '\0';
++ err = strict_strtoull(a, 0, result);
++ }
++ return err;
++}
++
++static int au_wbr_mfs_wmark(substring_t *arg, char *str,
++ struct au_opt_wbr_create *create)
++{
++ int err;
++ unsigned long long ull;
++
++ err = 0;
++ if (!au_match_ull(arg, &ull))
++ create->mfsrr_watermark = ull;
++ else {
++ AuErr("bad integer in %s\n", str);
++ err = -EINVAL;
++ }
++
++ return err;
++}
++
++static int au_wbr_mfs_sec(substring_t *arg, char *str,
++ struct au_opt_wbr_create *create)
++{
++ int n, err;
++
++ err = 0;
++ if (!match_int(arg, &n) && 0 <= n)
++ create->mfs_second = n;
++ else {
++ AuErr("bad integer in %s\n", str);
++ err = -EINVAL;
++ }
++
++ return err;
++}
++
++static int au_wbr_create_val(char *str, struct au_opt_wbr_create *create)
++{
++ int err, e;
++ substring_t args[MAX_OPT_ARGS];
++
++ err = match_token(str, au_wbr_create_policy, args);
++ create->wbr_create = err;
++ switch (err) {
++ case AuWbrCreate_MFSRRV:
++ e = au_wbr_mfs_wmark(&args[0], str, create);
++ if (!e)
++ e = au_wbr_mfs_sec(&args[1], str, create);
++ if (unlikely(e))
++ err = e;
++ break;
++ case AuWbrCreate_MFSRR:
++ e = au_wbr_mfs_wmark(&args[0], str, create);
++ if (unlikely(e)) {
++ err = e;
++ break;
++ }
++ /*FALLTHROUGH*/
++ case AuWbrCreate_MFS:
++ case AuWbrCreate_PMFS:
++ create->mfs_second = AUFS_MFS_SECOND_DEF;
++ break;
++ case AuWbrCreate_MFSV:
++ case AuWbrCreate_PMFSV:
++ e = au_wbr_mfs_sec(&args[0], str, create);
++ if (unlikely(e))
++ err = e;
++ break;
++ }
++
++ return err;
++}
++
++const char *au_optstr_wbr_create(int wbr_create)
++{
++ return au_parser_pattern(wbr_create, (void *)au_wbr_create_policy);
++}
++
++static match_table_t au_wbr_copyup_policy = {
++ {AuWbrCopyup_TDP, "tdp"},
++ {AuWbrCopyup_TDP, "top-down-parent"},
++ {AuWbrCopyup_BUP, "bup"},
++ {AuWbrCopyup_BUP, "bottom-up-parent"},
++ {AuWbrCopyup_BU, "bu"},
++ {AuWbrCopyup_BU, "bottom-up"},
++ {-1, NULL}
++};
++
++static int au_wbr_copyup_val(char *str)
++{
++ substring_t args[MAX_OPT_ARGS];
++
++ return match_token(str, au_wbr_copyup_policy, args);
++}
++
++const char *au_optstr_wbr_copyup(int wbr_copyup)
++{
++ return au_parser_pattern(wbr_copyup, (void *)au_wbr_copyup_policy);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
++
++static void dump_opts(struct au_opts *opts)
++{
++#ifdef CONFIG_AUFS_DEBUG
++ /* reduce stack space */
++ union {
++ struct au_opt_add *add;
++ struct au_opt_del *del;
++ struct au_opt_mod *mod;
++ struct au_opt_xino *xino;
++ struct au_opt_xino_itrunc *xino_itrunc;
++ struct au_opt_wbr_create *create;
++ } u;
++ struct au_opt *opt;
++
++ opt = opts->opt;
++ while (opt->type != Opt_tail) {
++ switch (opt->type) {
++ case Opt_add:
++ u.add = &opt->add;
++ AuDbg("add {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++ case Opt_del:
++ case Opt_idel:
++ u.del = &opt->del;
++ AuDbg("del {%s, %p}\n",
++ u.del->pathname, u.del->h_path.dentry);
++ break;
++ case Opt_mod:
++ case Opt_imod:
++ u.mod = &opt->mod;
++ AuDbg("mod {%s, 0x%x, %p}\n",
++ u.mod->path, u.mod->perm, u.mod->h_root);
++ break;
++ case Opt_append:
++ u.add = &opt->add;
++ AuDbg("append {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++ case Opt_prepend:
++ u.add = &opt->add;
++ AuDbg("prepend {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++ case Opt_dirwh:
++ AuDbg("dirwh %d\n", opt->dirwh);
++ break;
++ case Opt_rdcache:
++ AuDbg("rdcache %d\n", opt->rdcache);
++ break;
++ case Opt_rdblk:
++ AuDbg("rdblk %u\n", opt->rdblk);
++ break;
++ case Opt_rdblk_def:
++ AuDbg("rdblk_def\n");
++ break;
++ case Opt_rdhash:
++ AuDbg("rdhash %u\n", opt->rdhash);
++ break;
++ case Opt_rdhash_def:
++ AuDbg("rdhash_def\n");
++ break;
++ case Opt_xino:
++ u.xino = &opt->xino;
++ AuDbg("xino {%s %.*s}\n",
++ u.xino->path,
++ AuDLNPair(u.xino->file->f_dentry));
++ break;
++ case Opt_trunc_xino:
++ AuLabel(trunc_xino);
++ break;
++ case Opt_notrunc_xino:
++ AuLabel(notrunc_xino);
++ break;
++ case Opt_trunc_xino_path:
++ case Opt_itrunc_xino:
++ u.xino_itrunc = &opt->xino_itrunc;
++ AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex);
++ break;
++
++ case Opt_noxino:
++ AuLabel(noxino);
++ break;
++ case Opt_trunc_xib:
++ AuLabel(trunc_xib);
++ break;
++ case Opt_notrunc_xib:
++ AuLabel(notrunc_xib);
++ break;
++ case Opt_shwh:
++ AuLabel(shwh);
++ break;
++ case Opt_noshwh:
++ AuLabel(noshwh);
++ break;
++ case Opt_plink:
++ AuLabel(plink);
++ break;
++ case Opt_noplink:
++ AuLabel(noplink);
++ break;
++ case Opt_list_plink:
++ AuLabel(list_plink);
++ break;
++ case Opt_udba:
++ AuDbg("udba %d, %s\n",
++ opt->udba, au_optstr_udba(opt->udba));
++ break;
++ case Opt_diropq_a:
++ AuLabel(diropq_a);
++ break;
++ case Opt_diropq_w:
++ AuLabel(diropq_w);
++ break;
++ case Opt_warn_perm:
++ AuLabel(warn_perm);
++ break;
++ case Opt_nowarn_perm:
++ AuLabel(nowarn_perm);
++ break;
++ case Opt_refrof:
++ AuLabel(refrof);
++ break;
++ case Opt_norefrof:
++ AuLabel(norefrof);
++ break;
++ case Opt_verbose:
++ AuLabel(verbose);
++ break;
++ case Opt_noverbose:
++ AuLabel(noverbose);
++ break;
++ case Opt_sum:
++ AuLabel(sum);
++ break;
++ case Opt_nosum:
++ AuLabel(nosum);
++ break;
++ case Opt_wsum:
++ AuLabel(wsum);
++ break;
++ case Opt_wbr_create:
++ u.create = &opt->wbr_create;
++ AuDbg("create %d, %s\n", u.create->wbr_create,
++ au_optstr_wbr_create(u.create->wbr_create));
++ switch (u.create->wbr_create) {
++ case AuWbrCreate_MFSV:
++ case AuWbrCreate_PMFSV:
++ AuDbg("%d sec\n", u.create->mfs_second);
++ break;
++ case AuWbrCreate_MFSRR:
++ AuDbg("%llu watermark\n",
++ u.create->mfsrr_watermark);
++ break;
++ case AuWbrCreate_MFSRRV:
++ AuDbg("%llu watermark, %d sec\n",
++ u.create->mfsrr_watermark,
++ u.create->mfs_second);
++ break;
++ }
++ break;
++ case Opt_wbr_copyup:
++ AuDbg("copyup %d, %s\n", opt->wbr_copyup,
++ au_optstr_wbr_copyup(opt->wbr_copyup));
++ break;
++ default:
++ BUG();
++ }
++ opt++;
++ }
++#endif
++}
++
++void au_opts_free(struct au_opts *opts)
++{
++ struct au_opt *opt;
++
++ opt = opts->opt;
++ while (opt->type != Opt_tail) {
++ switch (opt->type) {
++ case Opt_add:
++ case Opt_append:
++ case Opt_prepend:
++ path_put(&opt->add.path);
++ break;
++ case Opt_del:
++ case Opt_idel:
++ path_put(&opt->del.h_path);
++ break;
++ case Opt_mod:
++ case Opt_imod:
++ dput(opt->mod.h_root);
++ break;
++ case Opt_xino:
++ fput(opt->xino.file);
++ break;
++ }
++ opt++;
++ }
++}
++
++static int opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags,
++ aufs_bindex_t bindex)
++{
++ int err;
++ struct au_opt_add *add = &opt->add;
++ char *p;
++
++ add->bindex = bindex;
++ add->perm = AuBrPerm_Last;
++ add->pathname = opt_str;
++ p = strchr(opt_str, '=');
++ if (p) {
++ *p++ = 0;
++ if (*p)
++ add->perm = br_perm_val(p);
++ }
++
++ err = vfsub_kern_path(add->pathname, lkup_dirflags, &add->path);
++ if (!err) {
++ if (!p) {
++ add->perm = AuBrPerm_RO;
++ if (au_test_fs_rr(add->path.dentry->d_sb))
++ add->perm = AuBrPerm_RR;
++ else if (!bindex && !(sb_flags & MS_RDONLY))
++ add->perm = AuBrPerm_RW;
++ }
++ opt->type = Opt_add;
++ goto out;
++ }
++ AuErr("lookup failed %s (%d)\n", add->pathname, err);
++ err = -EINVAL;
++
++ out:
++ return err;
++}
++
++static int au_opts_parse_del(struct au_opt_del *del, substring_t args[])
++{
++ int err;
++
++ del->pathname = args[0].from;
++ AuDbg("del path %s\n", del->pathname);
++
++ err = vfsub_kern_path(del->pathname, lkup_dirflags, &del->h_path);
++ if (unlikely(err))
++ AuErr("lookup failed %s (%d)\n", del->pathname, err);
++
++ return err;
++}
++
++#if 0 /* reserved for future use */
++static int au_opts_parse_idel(struct super_block *sb, aufs_bindex_t bindex,
++ struct au_opt_del *del, substring_t args[])
++{
++ int err;
++ struct dentry *root;
++
++ err = -EINVAL;
++ root = sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ if (bindex < 0 || au_sbend(sb) < bindex) {
++ AuErr("out of bounds, %d\n", bindex);
++ goto out;
++ }
++
++ err = 0;
++ del->h_path.dentry = dget(au_h_dptr(root, bindex));
++ del->h_path.mnt = mntget(au_sbr_mnt(sb, bindex));
++
++ out:
++ aufs_read_unlock(root, !AuLock_IR);
++ return err;
++}
++#endif
++
++static int au_opts_parse_mod(struct au_opt_mod *mod, substring_t args[])
++{
++ int err;
++ struct path path;
++ char *p;
++
++ err = -EINVAL;
++ mod->path = args[0].from;
++ p = strchr(mod->path, '=');
++ if (unlikely(!p)) {
++ AuErr("no permssion %s\n", args[0].from);
++ goto out;
++ }
++
++ *p++ = 0;
++ err = vfsub_kern_path(mod->path, lkup_dirflags, &path);
++ if (unlikely(err)) {
++ AuErr("lookup failed %s (%d)\n", mod->path, err);
++ goto out;
++ }
++
++ mod->perm = br_perm_val(p);
++ AuDbg("mod path %s, perm 0x%x, %s\n", mod->path, mod->perm, p);
++ mod->h_root = dget(path.dentry);
++ path_put(&path);
++
++ out:
++ return err;
++}
++
++#if 0 /* reserved for future use */
++static int au_opts_parse_imod(struct super_block *sb, aufs_bindex_t bindex,
++ struct au_opt_mod *mod, substring_t args[])
++{
++ int err;
++ struct dentry *root;
++
++ err = -EINVAL;
++ root = sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ if (bindex < 0 || au_sbend(sb) < bindex) {
++ AuErr("out of bounds, %d\n", bindex);
++ goto out;
++ }
++
++ err = 0;
++ mod->perm = br_perm_val(args[1].from);
++ AuDbg("mod path %s, perm 0x%x, %s\n",
++ mod->path, mod->perm, args[1].from);
++ mod->h_root = dget(au_h_dptr(root, bindex));
++
++ out:
++ aufs_read_unlock(root, !AuLock_IR);
++ return err;
++}
++#endif
++
++static int au_opts_parse_xino(struct super_block *sb, struct au_opt_xino *xino,
++ substring_t args[])
++{
++ int err;
++ struct file *file;
++
++ file = au_xino_create(sb, args[0].from, /*silent*/0);
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++
++ err = -EINVAL;
++ if (unlikely(file->f_dentry->d_sb == sb)) {
++ fput(file);
++ AuErr("%s must be outside\n", args[0].from);
++ goto out;
++ }
++
++ err = 0;
++ xino->file = file;
++ xino->path = args[0].from;
++
++ out:
++ return err;
++}
++
++static
++int au_opts_parse_xino_itrunc_path(struct super_block *sb,
++ struct au_opt_xino_itrunc *xino_itrunc,
++ substring_t args[])
++{
++ int err;
++ aufs_bindex_t bend, bindex;
++ struct path path;
++ struct dentry *root;
++
++ err = vfsub_kern_path(args[0].from, lkup_dirflags, &path);
++ if (unlikely(err)) {
++ AuErr("lookup failed %s (%d)\n", args[0].from, err);
++ goto out;
++ }
++
++ xino_itrunc->bindex = -1;
++ root = sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex <= bend; bindex++) {
++ if (au_h_dptr(root, bindex) == path.dentry) {
++ xino_itrunc->bindex = bindex;
++ break;
++ }
++ }
++ aufs_read_unlock(root, !AuLock_IR);
++ path_put(&path);
++
++ if (unlikely(xino_itrunc->bindex < 0)) {
++ AuErr("no such branch %s\n", args[0].from);
++ err = -EINVAL;
++ }
++
++ out:
++ return err;
++}
++
++/* called without aufs lock */
++int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts)
++{
++ int err, n, token;
++ aufs_bindex_t bindex;
++ unsigned char skipped;
++ struct dentry *root;
++ struct au_opt *opt, *opt_tail;
++ char *opt_str;
++ /* reduce the stack space */
++ union {
++ struct au_opt_xino_itrunc *xino_itrunc;
++ struct au_opt_wbr_create *create;
++ } u;
++ struct {
++ substring_t args[MAX_OPT_ARGS];
++ } *a;
++
++ err = -ENOMEM;
++ a = kmalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ root = sb->s_root;
++ err = 0;
++ bindex = 0;
++ opt = opts->opt;
++ opt_tail = opt + opts->max_opt - 1;
++ opt->type = Opt_tail;
++ while (!err && (opt_str = strsep(&str, ",")) && *opt_str) {
++ err = -EINVAL;
++ skipped = 0;
++ token = match_token(opt_str, options, a->args);
++ switch (token) {
++ case Opt_br:
++ err = 0;
++ while (!err && (opt_str = strsep(&a->args[0].from, ":"))
++ && *opt_str) {
++ err = opt_add(opt, opt_str, opts->sb_flags,
++ bindex++);
++ if (unlikely(!err && ++opt > opt_tail)) {
++ err = -E2BIG;
++ break;
++ }
++ opt->type = Opt_tail;
++ skipped = 1;
++ }
++ break;
++ case Opt_add:
++ if (unlikely(match_int(&a->args[0], &n))) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ bindex = n;
++ err = opt_add(opt, a->args[1].from, opts->sb_flags,
++ bindex);
++ if (!err)
++ opt->type = token;
++ break;
++ case Opt_append:
++ err = opt_add(opt, a->args[0].from, opts->sb_flags,
++ /*dummy bindex*/1);
++ if (!err)
++ opt->type = token;
++ break;
++ case Opt_prepend:
++ err = opt_add(opt, a->args[0].from, opts->sb_flags,
++ /*bindex*/0);
++ if (!err)
++ opt->type = token;
++ break;
++ case Opt_del:
++ err = au_opts_parse_del(&opt->del, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++#if 0 /* reserved for future use */
++ case Opt_idel:
++ del->pathname = "(indexed)";
++ if (unlikely(match_int(&args[0], &n))) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ err = au_opts_parse_idel(sb, n, &opt->del, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++#endif
++ case Opt_mod:
++ err = au_opts_parse_mod(&opt->mod, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++#ifdef IMOD /* reserved for future use */
++ case Opt_imod:
++ u.mod->path = "(indexed)";
++ if (unlikely(match_int(&a->args[0], &n))) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ err = au_opts_parse_imod(sb, n, &opt->mod, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++#endif
++ case Opt_xino:
++ err = au_opts_parse_xino(sb, &opt->xino, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++
++ case Opt_trunc_xino_path:
++ err = au_opts_parse_xino_itrunc_path
++ (sb, &opt->xino_itrunc, a->args);
++ if (!err)
++ opt->type = token;
++ break;
++
++ case Opt_itrunc_xino:
++ u.xino_itrunc = &opt->xino_itrunc;
++ if (unlikely(match_int(&a->args[0], &n))) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ u.xino_itrunc->bindex = n;
++ aufs_read_lock(root, AuLock_FLUSH);
++ if (n < 0 || au_sbend(sb) < n) {
++ AuErr("out of bounds, %d\n", n);
++ aufs_read_unlock(root, !AuLock_IR);
++ break;
++ }
++ aufs_read_unlock(root, !AuLock_IR);
++ err = 0;
++ opt->type = token;
++ break;
++
++ case Opt_dirwh:
++ if (unlikely(match_int(&a->args[0], &opt->dirwh)))
++ break;
++ err = 0;
++ opt->type = token;
++ break;
++
++ case Opt_rdcache:
++ if (unlikely(match_int(&a->args[0], &opt->rdcache)))
++ break;
++ err = 0;
++ opt->type = token;
++ break;
++ case Opt_rdblk:
++ if (unlikely(match_int(&a->args[0], &n)
++ || n <= 0
++ || n > KMALLOC_MAX_SIZE)) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ if (unlikely(n < NAME_MAX)) {
++ AuErr("rdblk must be larger than %d\n",
++ NAME_MAX);
++ break;
++ }
++ opt->rdblk = n;
++ err = 0;
++ opt->type = token;
++ break;
++ case Opt_rdhash:
++ if (unlikely(match_int(&a->args[0], &n)
++ || n <= 0
++ || n * sizeof(struct hlist_head)
++ > KMALLOC_MAX_SIZE)) {
++ AuErr("bad integer in %s\n", opt_str);
++ break;
++ }
++ opt->rdhash = n;
++ err = 0;
++ opt->type = token;
++ break;
++
++ case Opt_trunc_xino:
++ case Opt_notrunc_xino:
++ case Opt_noxino:
++ case Opt_trunc_xib:
++ case Opt_notrunc_xib:
++ case Opt_shwh:
++ case Opt_noshwh:
++ case Opt_plink:
++ case Opt_noplink:
++ case Opt_list_plink:
++ case Opt_diropq_a:
++ case Opt_diropq_w:
++ case Opt_warn_perm:
++ case Opt_nowarn_perm:
++ case Opt_refrof:
++ case Opt_norefrof:
++ case Opt_verbose:
++ case Opt_noverbose:
++ case Opt_sum:
++ case Opt_nosum:
++ case Opt_wsum:
++ case Opt_rdblk_def:
++ case Opt_rdhash_def:
++ err = 0;
++ opt->type = token;
++ break;
++
++ case Opt_udba:
++ opt->udba = udba_val(a->args[0].from);
++ if (opt->udba >= 0) {
++ err = 0;
++ opt->type = token;
++ } else
++ AuErr("wrong value, %s\n", opt_str);
++ break;
++
++ case Opt_wbr_create:
++ u.create = &opt->wbr_create;
++ u.create->wbr_create
++ = au_wbr_create_val(a->args[0].from, u.create);
++ if (u.create->wbr_create >= 0) {
++ err = 0;
++ opt->type = token;
++ } else
++ AuErr("wrong value, %s\n", opt_str);
++ break;
++ case Opt_wbr_copyup:
++ opt->wbr_copyup = au_wbr_copyup_val(a->args[0].from);
++ if (opt->wbr_copyup >= 0) {
++ err = 0;
++ opt->type = token;
++ } else
++ AuErr("wrong value, %s\n", opt_str);
++ break;
++
++ case Opt_ignore:
++ AuWarn("ignored %s\n", opt_str);
++ /*FALLTHROUGH*/
++ case Opt_ignore_silent:
++ skipped = 1;
++ err = 0;
++ break;
++ case Opt_err:
++ AuErr("unknown option %s\n", opt_str);
++ break;
++ }
++
++ if (!err && !skipped) {
++ if (unlikely(++opt > opt_tail)) {
++ err = -E2BIG;
++ opt--;
++ opt->type = Opt_tail;
++ break;
++ }
++ opt->type = Opt_tail;
++ }
++ }
++
++ kfree(a);
++ dump_opts(opts);
++ if (unlikely(err))
++ au_opts_free(opts);
++
++ out:
++ return err;
++}
++
++static int au_opt_wbr_create(struct super_block *sb,
++ struct au_opt_wbr_create *create)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ err = 1; /* handled */
++ sbinfo = au_sbi(sb);
++ if (sbinfo->si_wbr_create_ops->fin) {
++ err = sbinfo->si_wbr_create_ops->fin(sb);
++ if (!err)
++ err = 1;
++ }
++
++ sbinfo->si_wbr_create = create->wbr_create;
++ sbinfo->si_wbr_create_ops = au_wbr_create_ops + create->wbr_create;
++ switch (create->wbr_create) {
++ case AuWbrCreate_MFSRRV:
++ case AuWbrCreate_MFSRR:
++ sbinfo->si_wbr_mfs.mfsrr_watermark = create->mfsrr_watermark;
++ /*FALLTHROUGH*/
++ case AuWbrCreate_MFS:
++ case AuWbrCreate_MFSV:
++ case AuWbrCreate_PMFS:
++ case AuWbrCreate_PMFSV:
++ sbinfo->si_wbr_mfs.mfs_expire = create->mfs_second * HZ;
++ break;
++ }
++
++ if (sbinfo->si_wbr_create_ops->init)
++ sbinfo->si_wbr_create_ops->init(sb); /* ignore */
++
++ return err;
++}
++
++/*
++ * returns,
++ * plus: processed without an error
++ * zero: unprocessed
++ */
++static int au_opt_simple(struct super_block *sb, struct au_opt *opt,
++ struct au_opts *opts)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ err = 1; /* handled */
++ sbinfo = au_sbi(sb);
++ switch (opt->type) {
++ case Opt_udba:
++ sbinfo->si_mntflags &= ~AuOptMask_UDBA;
++ sbinfo->si_mntflags |= opt->udba;
++ opts->given_udba |= opt->udba;
++ break;
++
++ case Opt_plink:
++ au_opt_set(sbinfo->si_mntflags, PLINK);
++ break;
++ case Opt_noplink:
++ if (au_opt_test(sbinfo->si_mntflags, PLINK))
++ au_plink_put(sb);
++ au_opt_clr(sbinfo->si_mntflags, PLINK);
++ break;
++ case Opt_list_plink:
++ if (au_opt_test(sbinfo->si_mntflags, PLINK))
++ au_plink_list(sb);
++ break;
++
++ case Opt_diropq_a:
++ au_opt_set(sbinfo->si_mntflags, ALWAYS_DIROPQ);
++ break;
++ case Opt_diropq_w:
++ au_opt_clr(sbinfo->si_mntflags, ALWAYS_DIROPQ);
++ break;
++
++ case Opt_warn_perm:
++ au_opt_set(sbinfo->si_mntflags, WARN_PERM);
++ break;
++ case Opt_nowarn_perm:
++ au_opt_clr(sbinfo->si_mntflags, WARN_PERM);
++ break;
++
++ case Opt_refrof:
++ au_opt_set(sbinfo->si_mntflags, REFROF);
++ break;
++ case Opt_norefrof:
++ au_opt_clr(sbinfo->si_mntflags, REFROF);
++ break;
++
++ case Opt_verbose:
++ au_opt_set(sbinfo->si_mntflags, VERBOSE);
++ break;
++ case Opt_noverbose:
++ au_opt_clr(sbinfo->si_mntflags, VERBOSE);
++ break;
++
++ case Opt_sum:
++ au_opt_set(sbinfo->si_mntflags, SUM);
++ break;
++ case Opt_wsum:
++ au_opt_clr(sbinfo->si_mntflags, SUM);
++ au_opt_set(sbinfo->si_mntflags, SUM_W);
++ case Opt_nosum:
++ au_opt_clr(sbinfo->si_mntflags, SUM);
++ au_opt_clr(sbinfo->si_mntflags, SUM_W);
++ break;
++
++ case Opt_wbr_create:
++ err = au_opt_wbr_create(sb, &opt->wbr_create);
++ break;
++ case Opt_wbr_copyup:
++ sbinfo->si_wbr_copyup = opt->wbr_copyup;
++ sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + opt->wbr_copyup;
++ break;
++
++ case Opt_dirwh:
++ sbinfo->si_dirwh = opt->dirwh;
++ break;
++
++ case Opt_rdcache:
++ sbinfo->si_rdcache = opt->rdcache * HZ;
++ break;
++ case Opt_rdblk:
++ sbinfo->si_rdblk = opt->rdblk;
++ break;
++ case Opt_rdblk_def:
++ sbinfo->si_rdblk = AUFS_RDBLK_DEF;
++ break;
++ case Opt_rdhash:
++ sbinfo->si_rdhash = opt->rdhash;
++ break;
++ case Opt_rdhash_def:
++ sbinfo->si_rdhash = AUFS_RDHASH_DEF;
++ break;
++
++ case Opt_shwh:
++ au_opt_set(sbinfo->si_mntflags, SHWH);
++ break;
++ case Opt_noshwh:
++ au_opt_clr(sbinfo->si_mntflags, SHWH);
++ break;
++
++ case Opt_trunc_xino:
++ au_opt_set(sbinfo->si_mntflags, TRUNC_XINO);
++ break;
++ case Opt_notrunc_xino:
++ au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO);
++ break;
++
++ case Opt_trunc_xino_path:
++ case Opt_itrunc_xino:
++ err = au_xino_trunc(sb, opt->xino_itrunc.bindex);
++ if (!err)
++ err = 1;
++ break;
++
++ case Opt_trunc_xib:
++ au_fset_opts(opts->flags, TRUNC_XIB);
++ break;
++ case Opt_notrunc_xib:
++ au_fclr_opts(opts->flags, TRUNC_XIB);
++ break;
++
++ default:
++ err = 0;
++ break;
++ }
++
++ return err;
++}
++
++/*
++ * returns tri-state.
++ * plus: processed without an error
++ * zero: unprocessed
++ * minus: error
++ */
++static int au_opt_br(struct super_block *sb, struct au_opt *opt,
++ struct au_opts *opts)
++{
++ int err, do_refresh;
++
++ err = 0;
++ switch (opt->type) {
++ case Opt_append:
++ opt->add.bindex = au_sbend(sb) + 1;
++ if (opt->add.bindex < 0)
++ opt->add.bindex = 0;
++ goto add;
++ case Opt_prepend:
++ opt->add.bindex = 0;
++ add:
++ case Opt_add:
++ err = au_br_add(sb, &opt->add,
++ au_ftest_opts(opts->flags, REMOUNT));
++ if (!err) {
++ err = 1;
++ au_fset_opts(opts->flags, REFRESH_DIR);
++ if (au_br_whable(opt->add.perm))
++ au_fset_opts(opts->flags, REFRESH_NONDIR);
++ }
++ break;
++
++ case Opt_del:
++ case Opt_idel:
++ err = au_br_del(sb, &opt->del,
++ au_ftest_opts(opts->flags, REMOUNT));
++ if (!err) {
++ err = 1;
++ au_fset_opts(opts->flags, TRUNC_XIB);
++ au_fset_opts(opts->flags, REFRESH_DIR);
++ au_fset_opts(opts->flags, REFRESH_NONDIR);
++ }
++ break;
++
++ case Opt_mod:
++ case Opt_imod:
++ err = au_br_mod(sb, &opt->mod,
++ au_ftest_opts(opts->flags, REMOUNT),
++ &do_refresh);
++ if (!err) {
++ err = 1;
++ if (do_refresh) {
++ au_fset_opts(opts->flags, REFRESH_DIR);
++ au_fset_opts(opts->flags, REFRESH_NONDIR);
++ }
++ }
++ break;
++ }
++
++ return err;
++}
++
++static int au_opt_xino(struct super_block *sb, struct au_opt *opt,
++ struct au_opt_xino **opt_xino,
++ struct au_opts *opts)
++{
++ int err;
++ aufs_bindex_t bend, bindex;
++ struct dentry *root, *parent, *h_root;
++
++ err = 0;
++ switch (opt->type) {
++ case Opt_xino:
++ err = au_xino_set(sb, &opt->xino,
++ !!au_ftest_opts(opts->flags, REMOUNT));
++ if (unlikely(err))
++ break;
++
++ *opt_xino = &opt->xino;
++ au_xino_brid_set(sb, -1);
++
++ /* safe d_parent access */
++ parent = opt->xino.file->f_dentry->d_parent;
++ root = sb->s_root;
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex <= bend; bindex++) {
++ h_root = au_h_dptr(root, bindex);
++ if (h_root == parent) {
++ au_xino_brid_set(sb, au_sbr_id(sb, bindex));
++ break;
++ }
++ }
++ break;
++
++ case Opt_noxino:
++ au_xino_clr(sb);
++ au_xino_brid_set(sb, -1);
++ *opt_xino = (void *)-1;
++ break;
++ }
++
++ return err;
++}
++
++int au_opts_verify(struct super_block *sb, unsigned long sb_flags,
++ unsigned int pending)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ unsigned char do_plink, skip, do_free;
++ struct au_branch *br;
++ struct au_wbr *wbr;
++ struct dentry *root;
++ struct inode *dir, *h_dir;
++ struct au_sbinfo *sbinfo;
++ struct au_hinode *hdir;
++
++ SiMustAnyLock(sb);
++
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!(sbinfo->si_mntflags & AuOptMask_UDBA));
++
++ if (!(sb_flags & MS_RDONLY)) {
++ if (unlikely(!au_br_writable(au_sbr_perm(sb, 0))))
++ AuWarn("first branch should be rw\n");
++ if (unlikely(au_opt_test(sbinfo->si_mntflags, SHWH)))
++ AuWarn("shwh should be used with ro\n");
++ }
++
++ if (au_opt_test((sbinfo->si_mntflags | pending), UDBA_HINOTIFY)
++ && !au_opt_test(sbinfo->si_mntflags, XINO))
++ AuWarn("udba=inotify requires xino\n");
++
++ err = 0;
++ root = sb->s_root;
++ dir = sb->s_root->d_inode;
++ do_plink = !!au_opt_test(sbinfo->si_mntflags, PLINK);
++ bend = au_sbend(sb);
++ for (bindex = 0; !err && bindex <= bend; bindex++) {
++ skip = 0;
++ h_dir = au_h_iptr(dir, bindex);
++ br = au_sbr(sb, bindex);
++ do_free = 0;
++
++ wbr = br->br_wbr;
++ if (wbr)
++ wbr_wh_read_lock(wbr);
++
++ switch (br->br_perm) {
++ case AuBrPerm_RO:
++ case AuBrPerm_ROWH:
++ case AuBrPerm_RR:
++ case AuBrPerm_RRWH:
++ do_free = !!wbr;
++ skip = (!wbr
++ || (!wbr->wbr_whbase
++ && !wbr->wbr_plink
++ && !wbr->wbr_orph));
++ break;
++
++ case AuBrPerm_RWNoLinkWH:
++ /* skip = (!br->br_whbase && !br->br_orph); */
++ skip = (!wbr || !wbr->wbr_whbase);
++ if (skip && wbr) {
++ if (do_plink)
++ skip = !!wbr->wbr_plink;
++ else
++ skip = !wbr->wbr_plink;
++ }
++ break;
++
++ case AuBrPerm_RW:
++ /* skip = (br->br_whbase && br->br_ohph); */
++ skip = (wbr && wbr->wbr_whbase);
++ if (skip) {
++ if (do_plink)
++ skip = !!wbr->wbr_plink;
++ else
++ skip = !wbr->wbr_plink;
++ }
++ break;
++
++ default:
++ BUG();
++ }
++ if (wbr)
++ wbr_wh_read_unlock(wbr);
++
++ if (skip)
++ continue;
++
++ hdir = au_hi(dir, bindex);
++ au_hin_imtx_lock_nested(hdir, AuLsc_I_PARENT);
++ if (wbr)
++ wbr_wh_write_lock(wbr);
++ err = au_wh_init(au_h_dptr(root, bindex), br, sb);
++ if (wbr)
++ wbr_wh_write_unlock(wbr);
++ au_hin_imtx_unlock(hdir);
++
++ if (!err && do_free) {
++ kfree(wbr);
++ br->br_wbr = NULL;
++ }
++ }
++
++ return err;
++}
++
++int au_opts_mount(struct super_block *sb, struct au_opts *opts)
++{
++ int err;
++ unsigned int tmp;
++ aufs_bindex_t bend;
++ struct au_opt *opt;
++ struct au_opt_xino *opt_xino, xino;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ err = 0;
++ opt_xino = NULL;
++ opt = opts->opt;
++ while (err >= 0 && opt->type != Opt_tail)
++ err = au_opt_simple(sb, opt++, opts);
++ if (err > 0)
++ err = 0;
++ else if (unlikely(err < 0))
++ goto out;
++
++ /* disable xino and udba temporary */
++ sbinfo = au_sbi(sb);
++ tmp = sbinfo->si_mntflags;
++ au_opt_clr(sbinfo->si_mntflags, XINO);
++ au_opt_set_udba(sbinfo->si_mntflags, UDBA_REVAL);
++
++ opt = opts->opt;
++ while (err >= 0 && opt->type != Opt_tail)
++ err = au_opt_br(sb, opt++, opts);
++ if (err > 0)
++ err = 0;
++ else if (unlikely(err < 0))
++ goto out;
++
++ bend = au_sbend(sb);
++ if (unlikely(bend < 0)) {
++ err = -EINVAL;
++ AuErr("no branches\n");
++ goto out;
++ }
++
++ if (au_opt_test(tmp, XINO))
++ au_opt_set(sbinfo->si_mntflags, XINO);
++ opt = opts->opt;
++ while (!err && opt->type != Opt_tail)
++ err = au_opt_xino(sb, opt++, &opt_xino, opts);
++ if (unlikely(err))
++ goto out;
++
++ err = au_opts_verify(sb, sb->s_flags, tmp);
++ if (unlikely(err))
++ goto out;
++
++ /* restore xino */
++ if (au_opt_test(tmp, XINO) && !opt_xino) {
++ xino.file = au_xino_def(sb);
++ err = PTR_ERR(xino.file);
++ if (IS_ERR(xino.file))
++ goto out;
++
++ err = au_xino_set(sb, &xino, /*remount*/0);
++ fput(xino.file);
++ if (unlikely(err))
++ goto out;
++ }
++
++ /* restore udba */
++ sbinfo->si_mntflags &= ~AuOptMask_UDBA;
++ sbinfo->si_mntflags |= (tmp & AuOptMask_UDBA);
++ if (au_opt_test(tmp, UDBA_HINOTIFY)) {
++ struct inode *dir = sb->s_root->d_inode;
++ au_reset_hinotify(dir,
++ au_hi_flags(dir, /*isdir*/1) & ~AuHi_XINO);
++ }
++
++ out:
++ return err;
++}
++
++int au_opts_remount(struct super_block *sb, struct au_opts *opts)
++{
++ int err, rerr;
++ struct inode *dir;
++ struct au_opt_xino *opt_xino;
++ struct au_opt *opt;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ dir = sb->s_root->d_inode;
++ sbinfo = au_sbi(sb);
++ err = 0;
++ opt_xino = NULL;
++ opt = opts->opt;
++ while (err >= 0 && opt->type != Opt_tail) {
++ err = au_opt_simple(sb, opt, opts);
++ if (!err)
++ err = au_opt_br(sb, opt, opts);
++ if (!err)
++ err = au_opt_xino(sb, opt, &opt_xino, opts);
++ opt++;
++ }
++ if (err > 0)
++ err = 0;
++ AuTraceErr(err);
++ /* go on even err */
++
++ rerr = au_opts_verify(sb, opts->sb_flags, /*pending*/0);
++ if (unlikely(rerr && !err))
++ err = rerr;
++
++ if (au_ftest_opts(opts->flags, TRUNC_XIB)) {
++ rerr = au_xib_trunc(sb);
++ if (unlikely(rerr && !err))
++ err = rerr;
++ }
++
++ /* will be handled by the caller */
++ if (!au_ftest_opts(opts->flags, REFRESH_DIR)
++ && (opts->given_udba || au_opt_test(sbinfo->si_mntflags, XINO)))
++ au_fset_opts(opts->flags, REFRESH_DIR);
++
++ AuDbg("status 0x%x\n", opts->flags);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++unsigned int au_opt_udba(struct super_block *sb)
++{
++ return au_mntflags(sb) & AuOptMask_UDBA;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/opts.h linux-2.6.31.5/fs/aufs/opts.h
+--- linux-2.6.31.5.orig/fs/aufs/opts.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/opts.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,196 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * mount options/flags
++ */
++
++#ifndef __AUFS_OPTS_H__
++#define __AUFS_OPTS_H__
++
++#ifdef __KERNEL__
++
++#include <linux/path.h>
++#include <linux/aufs_type.h>
++
++struct file;
++struct super_block;
++
++/* ---------------------------------------------------------------------- */
++
++/* mount flags */
++#define AuOpt_XINO 1 /* external inode number bitmap
++ and translation table */
++#define AuOpt_TRUNC_XINO (1 << 1) /* truncate xino files */
++#define AuOpt_UDBA_NONE (1 << 2) /* users direct branch access */
++#define AuOpt_UDBA_REVAL (1 << 3)
++#define AuOpt_UDBA_HINOTIFY (1 << 4)
++#define AuOpt_SHWH (1 << 5) /* show whiteout */
++#define AuOpt_PLINK (1 << 6) /* pseudo-link */
++#define AuOpt_DIRPERM1 (1 << 7) /* unimplemented */
++#define AuOpt_REFROF (1 << 8) /* unimplemented */
++#define AuOpt_ALWAYS_DIROPQ (1 << 9) /* policy to creating diropq */
++#define AuOpt_SUM (1 << 10) /* summation for statfs(2) */
++#define AuOpt_SUM_W (1 << 11) /* unimplemented */
++#define AuOpt_WARN_PERM (1 << 12) /* warn when add-branch */
++#define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */
++
++#ifndef CONFIG_AUFS_HINOTIFY
++#undef AuOpt_UDBA_HINOTIFY
++#define AuOpt_UDBA_HINOTIFY 0
++#endif
++#ifndef CONFIG_AUFS_SHWH
++#undef AuOpt_SHWH
++#define AuOpt_SHWH 0
++#endif
++
++#define AuOpt_Def (AuOpt_XINO \
++ | AuOpt_UDBA_REVAL \
++ | AuOpt_PLINK \
++ /* | AuOpt_DIRPERM1 */ \
++ | AuOpt_WARN_PERM)
++#define AuOptMask_UDBA (AuOpt_UDBA_NONE \
++ | AuOpt_UDBA_REVAL \
++ | AuOpt_UDBA_HINOTIFY)
++
++#define au_opt_test(flags, name) (flags & AuOpt_##name)
++#define au_opt_set(flags, name) do { \
++ BUILD_BUG_ON(AuOpt_##name & AuOptMask_UDBA); \
++ ((flags) |= AuOpt_##name); \
++} while (0)
++#define au_opt_set_udba(flags, name) do { \
++ (flags) &= ~AuOptMask_UDBA; \
++ ((flags) |= AuOpt_##name); \
++} while (0)
++#define au_opt_clr(flags, name) { ((flags) &= ~AuOpt_##name); }
++
++/* ---------------------------------------------------------------------- */
++
++/* policies to select one among multiple writable branches */
++enum {
++ AuWbrCreate_TDP, /* top down parent */
++ AuWbrCreate_RR, /* round robin */
++ AuWbrCreate_MFS, /* most free space */
++ AuWbrCreate_MFSV, /* mfs with seconds */
++ AuWbrCreate_MFSRR, /* mfs then rr */
++ AuWbrCreate_MFSRRV, /* mfs then rr with seconds */
++ AuWbrCreate_PMFS, /* parent and mfs */
++ AuWbrCreate_PMFSV, /* parent and mfs with seconds */
++
++ AuWbrCreate_Def = AuWbrCreate_TDP
++};
++
++enum {
++ AuWbrCopyup_TDP, /* top down parent */
++ AuWbrCopyup_BUP, /* bottom up parent */
++ AuWbrCopyup_BU, /* bottom up */
++
++ AuWbrCopyup_Def = AuWbrCopyup_TDP
++};
++
++/* ---------------------------------------------------------------------- */
++
++struct au_opt_add {
++ aufs_bindex_t bindex;
++ char *pathname;
++ int perm;
++ struct path path;
++};
++
++struct au_opt_del {
++ char *pathname;
++ struct path h_path;
++};
++
++struct au_opt_mod {
++ char *path;
++ int perm;
++ struct dentry *h_root;
++};
++
++struct au_opt_xino {
++ char *path;
++ struct file *file;
++};
++
++struct au_opt_xino_itrunc {
++ aufs_bindex_t bindex;
++};
++
++struct au_opt_wbr_create {
++ int wbr_create;
++ int mfs_second;
++ unsigned long long mfsrr_watermark;
++};
++
++struct au_opt {
++ int type;
++ union {
++ struct au_opt_xino xino;
++ struct au_opt_xino_itrunc xino_itrunc;
++ struct au_opt_add add;
++ struct au_opt_del del;
++ struct au_opt_mod mod;
++ int dirwh;
++ int rdcache;
++ unsigned int rdblk;
++ unsigned int rdhash;
++ int udba;
++ struct au_opt_wbr_create wbr_create;
++ int wbr_copyup;
++ };
++};
++
++/* opts flags */
++#define AuOpts_REMOUNT 1
++#define AuOpts_REFRESH_DIR (1 << 1)
++#define AuOpts_REFRESH_NONDIR (1 << 2)
++#define AuOpts_TRUNC_XIB (1 << 3)
++#define au_ftest_opts(flags, name) ((flags) & AuOpts_##name)
++#define au_fset_opts(flags, name) { (flags) |= AuOpts_##name; }
++#define au_fclr_opts(flags, name) { (flags) &= ~AuOpts_##name; }
++
++struct au_opts {
++ struct au_opt *opt;
++ int max_opt;
++
++ unsigned int given_udba;
++ unsigned int flags;
++ unsigned long sb_flags;
++};
++
++/* ---------------------------------------------------------------------- */
++
++const char *au_optstr_br_perm(int brperm);
++const char *au_optstr_udba(int udba);
++const char *au_optstr_wbr_copyup(int wbr_copyup);
++const char *au_optstr_wbr_create(int wbr_create);
++
++void au_opts_free(struct au_opts *opts);
++int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts);
++int au_opts_verify(struct super_block *sb, unsigned long sb_flags,
++ unsigned int pending);
++int au_opts_mount(struct super_block *sb, struct au_opts *opts);
++int au_opts_remount(struct super_block *sb, struct au_opts *opts);
++
++unsigned int au_opt_udba(struct super_block *sb);
++
++/* ---------------------------------------------------------------------- */
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_OPTS_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/plink.c linux-2.6.31.5/fs/aufs/plink.c
+--- linux-2.6.31.5.orig/fs/aufs/plink.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/plink.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,354 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * pseudo-link
++ */
++
++#include "aufs.h"
++
++/*
++ * during a user process maintains the pseudo-links,
++ * prohibit adding a new plink and branch manipulation.
++ */
++void au_plink_block_maintain(struct super_block *sb)
++{
++ struct au_sbinfo *sbi = au_sbi(sb);
++
++ SiMustAnyLock(sb);
++
++ /* gave up wake_up_bit() */
++ wait_event(sbi->si_plink_wq, !au_ftest_si(sbi, MAINTAIN_PLINK));
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct pseudo_link {
++ struct list_head list;
++ struct inode *inode;
++};
++
++#ifdef CONFIG_AUFS_DEBUG
++void au_plink_list(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++ struct list_head *plink_list;
++ struct pseudo_link *plink;
++
++ SiMustAnyLock(sb);
++
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK));
++
++ plink_list = &sbinfo->si_plink.head;
++ spin_lock(&sbinfo->si_plink.spin);
++ list_for_each_entry(plink, plink_list, list)
++ AuDbg("%lu\n", plink->inode->i_ino);
++ spin_unlock(&sbinfo->si_plink.spin);
++}
++#endif
++
++/* is the inode pseudo-linked? */
++int au_plink_test(struct inode *inode)
++{
++ int found;
++ struct au_sbinfo *sbinfo;
++ struct list_head *plink_list;
++ struct pseudo_link *plink;
++
++ sbinfo = au_sbi(inode->i_sb);
++ AuRwMustAnyLock(&sbinfo->si_rwsem);
++ AuDebugOn(!au_opt_test(au_mntflags(inode->i_sb), PLINK));
++
++ found = 0;
++ plink_list = &sbinfo->si_plink.head;
++ spin_lock(&sbinfo->si_plink.spin);
++ list_for_each_entry(plink, plink_list, list)
++ if (plink->inode == inode) {
++ found = 1;
++ break;
++ }
++ spin_unlock(&sbinfo->si_plink.spin);
++ return found;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * generate a name for plink.
++ * the file will be stored under AUFS_WH_PLINKDIR.
++ */
++/* 20 is max digits length of ulong 64 */
++#define PLINK_NAME_LEN ((20 + 1) * 2)
++
++static int plink_name(char *name, int len, struct inode *inode,
++ aufs_bindex_t bindex)
++{
++ int rlen;
++ struct inode *h_inode;
++
++ h_inode = au_h_iptr(inode, bindex);
++ rlen = snprintf(name, len, "%lu.%lu", inode->i_ino, h_inode->i_ino);
++ return rlen;
++}
++
++/* lookup the plink-ed @inode under the branch at @bindex */
++struct dentry *au_plink_lkup(struct inode *inode, aufs_bindex_t bindex)
++{
++ struct dentry *h_dentry, *h_parent;
++ struct au_branch *br;
++ struct inode *h_dir;
++ char a[PLINK_NAME_LEN];
++ struct qstr tgtname = {
++ .name = a
++ };
++
++ br = au_sbr(inode->i_sb, bindex);
++ h_parent = br->br_wbr->wbr_plink;
++ h_dir = h_parent->d_inode;
++ tgtname.len = plink_name(a, sizeof(a), inode, bindex);
++
++ /* always superio. */
++ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_CHILD2);
++ h_dentry = au_sio_lkup_one(&tgtname, h_parent, br);
++ mutex_unlock(&h_dir->i_mutex);
++ return h_dentry;
++}
++
++/* create a pseudo-link */
++static int do_whplink(struct qstr *tgt, struct dentry *h_parent,
++ struct dentry *h_dentry, struct au_branch *br)
++{
++ int err;
++ struct path h_path = {
++ .mnt = br->br_mnt
++ };
++ struct inode *h_dir;
++
++ h_dir = h_parent->d_inode;
++ again:
++ h_path.dentry = au_lkup_one(tgt, h_parent, br, /*nd*/NULL);
++ err = PTR_ERR(h_path.dentry);
++ if (IS_ERR(h_path.dentry))
++ goto out;
++
++ err = 0;
++ /* wh.plink dir is not monitored */
++ if (h_path.dentry->d_inode
++ && h_path.dentry->d_inode != h_dentry->d_inode) {
++ err = vfsub_unlink(h_dir, &h_path, /*force*/0);
++ dput(h_path.dentry);
++ h_path.dentry = NULL;
++ if (!err)
++ goto again;
++ }
++ if (!err && !h_path.dentry->d_inode)
++ err = vfsub_link(h_dentry, h_dir, &h_path);
++ dput(h_path.dentry);
++
++ out:
++ return err;
++}
++
++struct do_whplink_args {
++ int *errp;
++ struct qstr *tgt;
++ struct dentry *h_parent;
++ struct dentry *h_dentry;
++ struct au_branch *br;
++};
++
++static void call_do_whplink(void *args)
++{
++ struct do_whplink_args *a = args;
++ *a->errp = do_whplink(a->tgt, a->h_parent, a->h_dentry, a->br);
++}
++
++static int whplink(struct dentry *h_dentry, struct inode *inode,
++ aufs_bindex_t bindex, struct au_branch *br)
++{
++ int err, wkq_err;
++ struct au_wbr *wbr;
++ struct dentry *h_parent;
++ struct inode *h_dir;
++ char a[PLINK_NAME_LEN];
++ struct qstr tgtname = {
++ .name = a
++ };
++
++ wbr = au_sbr(inode->i_sb, bindex)->br_wbr;
++ h_parent = wbr->wbr_plink;
++ h_dir = h_parent->d_inode;
++ tgtname.len = plink_name(a, sizeof(a), inode, bindex);
++
++ /* always superio. */
++ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_CHILD2);
++ if (!au_test_wkq(current)) {
++ struct do_whplink_args args = {
++ .errp = &err,
++ .tgt = &tgtname,
++ .h_parent = h_parent,
++ .h_dentry = h_dentry,
++ .br = br
++ };
++ wkq_err = au_wkq_wait(call_do_whplink, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ } else
++ err = do_whplink(&tgtname, h_parent, h_dentry, br);
++ mutex_unlock(&h_dir->i_mutex);
++
++ return err;
++}
++
++/* free a single plink */
++static void do_put_plink(struct pseudo_link *plink, int do_del)
++{
++ iput(plink->inode);
++ if (do_del)
++ list_del(&plink->list);
++ kfree(plink);
++}
++
++/*
++ * create a new pseudo-link for @h_dentry on @bindex.
++ * the linked inode is held in aufs @inode.
++ */
++void au_plink_append(struct inode *inode, aufs_bindex_t bindex,
++ struct dentry *h_dentry)
++{
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++ struct list_head *plink_list;
++ struct pseudo_link *plink;
++ int found, err, cnt;
++
++ sb = inode->i_sb;
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK));
++
++ err = 0;
++ cnt = 0;
++ found = 0;
++ plink_list = &sbinfo->si_plink.head;
++ spin_lock(&sbinfo->si_plink.spin);
++ list_for_each_entry(plink, plink_list, list) {
++ cnt++;
++ if (plink->inode == inode) {
++ found = 1;
++ break;
++ }
++ }
++ if (found) {
++ spin_unlock(&sbinfo->si_plink.spin);
++ return;
++ }
++
++ plink = NULL;
++ if (!found) {
++ plink = kmalloc(sizeof(*plink), GFP_ATOMIC);
++ if (plink) {
++ plink->inode = au_igrab(inode);
++ list_add(&plink->list, plink_list);
++ cnt++;
++ } else
++ err = -ENOMEM;
++ }
++ spin_unlock(&sbinfo->si_plink.spin);
++
++ if (!err) {
++ au_plink_block_maintain(sb);
++ err = whplink(h_dentry, inode, bindex, au_sbr(sb, bindex));
++ }
++
++ if (unlikely(cnt > AUFS_PLINK_WARN))
++ AuWarn1("unexpectedly many pseudo links, %d\n", cnt);
++ if (unlikely(err)) {
++ AuWarn("err %d, damaged pseudo link.\n", err);
++ if (!found && plink)
++ do_put_plink(plink, /*do_del*/1);
++ }
++}
++
++/* free all plinks */
++void au_plink_put(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++ struct list_head *plink_list;
++ struct pseudo_link *plink, *tmp;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK));
++
++ plink_list = &sbinfo->si_plink.head;
++ /* no spin_lock since sbinfo is write-locked */
++ list_for_each_entry_safe(plink, tmp, plink_list, list)
++ do_put_plink(plink, 0);
++ INIT_LIST_HEAD(plink_list);
++}
++
++/* free the plinks on a branch specified by @br_id */
++void au_plink_half_refresh(struct super_block *sb, aufs_bindex_t br_id)
++{
++ struct au_sbinfo *sbinfo;
++ struct list_head *plink_list;
++ struct pseudo_link *plink, *tmp;
++ struct inode *inode;
++ aufs_bindex_t bstart, bend, bindex;
++ unsigned char do_put;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK));
++
++ plink_list = &sbinfo->si_plink.head;
++ /* no spin_lock since sbinfo is write-locked */
++ list_for_each_entry_safe(plink, tmp, plink_list, list) {
++ do_put = 0;
++ inode = au_igrab(plink->inode);
++ ii_write_lock_child(inode);
++ bstart = au_ibstart(inode);
++ bend = au_ibend(inode);
++ if (bstart >= 0) {
++ for (bindex = bstart; bindex <= bend; bindex++) {
++ if (!au_h_iptr(inode, bindex)
++ || au_ii_br_id(inode, bindex) != br_id)
++ continue;
++ au_set_h_iptr(inode, bindex, NULL, 0);
++ do_put = 1;
++ break;
++ }
++ } else
++ do_put_plink(plink, 1);
++
++ if (do_put) {
++ for (bindex = bstart; bindex <= bend; bindex++)
++ if (au_h_iptr(inode, bindex)) {
++ do_put = 0;
++ break;
++ }
++ if (do_put)
++ do_put_plink(plink, 1);
++ }
++ ii_write_unlock(inode);
++ iput(inode);
++ }
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/poll.c linux-2.6.31.5/fs/aufs/poll.c
+--- linux-2.6.31.5.orig/fs/aufs/poll.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/poll.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,56 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * poll operation
++ * There is only one filesystem which implements ->poll operation, currently.
++ */
++
++#include "aufs.h"
++
++unsigned int aufs_poll(struct file *file, poll_table *wait)
++{
++ unsigned int mask;
++ int err;
++ struct file *h_file;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ /* We should pretend an error happened. */
++ mask = POLLERR /* | POLLIN | POLLOUT */;
++ dentry = file->f_dentry;
++ sb = dentry->d_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (unlikely(err))
++ goto out;
++
++ /* it is not an error if h_file has no operation */
++ mask = DEFAULT_POLLMASK;
++ h_file = au_h_fptr(file, au_fbstart(file));
++ if (h_file->f_op && h_file->f_op->poll)
++ mask = h_file->f_op->poll(h_file, wait);
++
++ di_read_unlock(dentry, AuLock_IR);
++ fi_read_unlock(file);
++
++ out:
++ si_read_unlock(sb);
++ AuTraceErr((int)mask);
++ return mask;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/rwsem.h linux-2.6.31.5/fs/aufs/rwsem.h
+--- linux-2.6.31.5.orig/fs/aufs/rwsem.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/rwsem.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,186 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * simple read-write semaphore wrappers
++ */
++
++#ifndef __AUFS_RWSEM_H__
++#define __AUFS_RWSEM_H__
++
++#ifdef __KERNEL__
++
++#include <linux/rwsem.h>
++
++struct au_rwsem {
++ struct rw_semaphore rwsem;
++#ifdef CONFIG_AUFS_DEBUG
++ /* just for debugging, not almighty counter */
++ atomic_t rcnt, wcnt;
++#endif
++};
++
++#ifdef CONFIG_AUFS_DEBUG
++#define AuDbgCntInit(rw) do { \
++ atomic_set(&(rw)->rcnt, 0); \
++ atomic_set(&(rw)->wcnt, 0); \
++ smp_mb(); /* atomic set */ \
++} while (0)
++
++#define AuDbgRcntInc(rw) atomic_inc_return(&(rw)->rcnt)
++#define AuDbgRcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->rcnt) < 0)
++#define AuDbgWcntInc(rw) WARN_ON(atomic_inc_return(&(rw)->wcnt) > 1)
++#define AuDbgWcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->wcnt) < 0)
++#else
++#define AuDbgCntInit(rw) do {} while (0)
++#define AuDbgRcntInc(rw) do {} while (0)
++#define AuDbgRcntDec(rw) do {} while (0)
++#define AuDbgWcntInc(rw) do {} while (0)
++#define AuDbgWcntDec(rw) do {} while (0)
++#endif /* CONFIG_AUFS_DEBUG */
++
++/* to debug easier, do not make them inlined functions */
++#define AuRwMustNoWaiters(rw) AuDebugOn(!list_empty(&(rw)->rwsem.wait_list))
++/* rwsem_is_locked() is unusable */
++#define AuRwMustReadLock(rw) AuDebugOn(atomic_read(&(rw)->rcnt) <= 0)
++#define AuRwMustWriteLock(rw) AuDebugOn(atomic_read(&(rw)->wcnt) <= 0)
++#define AuRwMustAnyLock(rw) AuDebugOn(atomic_read(&(rw)->rcnt) <= 0 \
++ && atomic_read(&(rw)->wcnt) <= 0)
++#define AuRwDestroy(rw) AuDebugOn(atomic_read(&(rw)->rcnt) \
++ || atomic_read(&(rw)->wcnt))
++
++static inline void au_rw_init(struct au_rwsem *rw)
++{
++ AuDbgCntInit(rw);
++ init_rwsem(&rw->rwsem);
++}
++
++static inline void au_rw_init_wlock(struct au_rwsem *rw)
++{
++ au_rw_init(rw);
++ down_write(&rw->rwsem);
++ AuDbgWcntInc(rw);
++}
++
++static inline void au_rw_init_wlock_nested(struct au_rwsem *rw,
++ unsigned int lsc)
++{
++ au_rw_init(rw);
++ down_write_nested(&rw->rwsem, lsc);
++ AuDbgWcntInc(rw);
++}
++
++static inline void au_rw_read_lock(struct au_rwsem *rw)
++{
++ down_read(&rw->rwsem);
++ AuDbgRcntInc(rw);
++}
++
++static inline void au_rw_read_lock_nested(struct au_rwsem *rw, unsigned int lsc)
++{
++ down_read_nested(&rw->rwsem, lsc);
++ AuDbgRcntInc(rw);
++}
++
++static inline void au_rw_read_unlock(struct au_rwsem *rw)
++{
++ AuRwMustReadLock(rw);
++ AuDbgRcntDec(rw);
++ up_read(&rw->rwsem);
++}
++
++static inline void au_rw_dgrade_lock(struct au_rwsem *rw)
++{
++ AuRwMustWriteLock(rw);
++ AuDbgRcntInc(rw);
++ AuDbgWcntDec(rw);
++ downgrade_write(&rw->rwsem);
++}
++
++static inline void au_rw_write_lock(struct au_rwsem *rw)
++{
++ down_write(&rw->rwsem);
++ AuDbgWcntInc(rw);
++}
++
++static inline void au_rw_write_lock_nested(struct au_rwsem *rw,
++ unsigned int lsc)
++{
++ down_write_nested(&rw->rwsem, lsc);
++ AuDbgWcntInc(rw);
++}
++
++static inline void au_rw_write_unlock(struct au_rwsem *rw)
++{
++ AuRwMustWriteLock(rw);
++ AuDbgWcntDec(rw);
++ up_write(&rw->rwsem);
++}
++
++/* why is not _nested version defined */
++static inline int au_rw_read_trylock(struct au_rwsem *rw)
++{
++ int ret = down_read_trylock(&rw->rwsem);
++ if (ret)
++ AuDbgRcntInc(rw);
++ return ret;
++}
++
++static inline int au_rw_write_trylock(struct au_rwsem *rw)
++{
++ int ret = down_write_trylock(&rw->rwsem);
++ if (ret)
++ AuDbgWcntInc(rw);
++ return ret;
++}
++
++#undef AuDbgCntInit
++#undef AuDbgRcntInc
++#undef AuDbgRcntDec
++#undef AuDbgWcntInc
++#undef AuDbgWcntDec
++
++#define AuSimpleLockRwsemFuncs(prefix, param, rwsem) \
++static inline void prefix##_read_lock(param) \
++{ au_rw_read_lock(rwsem); } \
++static inline void prefix##_write_lock(param) \
++{ au_rw_write_lock(rwsem); } \
++static inline int prefix##_read_trylock(param) \
++{ return au_rw_read_trylock(rwsem); } \
++static inline int prefix##_write_trylock(param) \
++{ return au_rw_write_trylock(rwsem); }
++/* why is not _nested version defined */
++/* static inline void prefix##_read_trylock_nested(param, lsc)
++{ au_rw_read_trylock_nested(rwsem, lsc)); }
++static inline void prefix##_write_trylock_nestd(param, lsc)
++{ au_rw_write_trylock_nested(rwsem, lsc); } */
++
++#define AuSimpleUnlockRwsemFuncs(prefix, param, rwsem) \
++static inline void prefix##_read_unlock(param) \
++{ au_rw_read_unlock(rwsem); } \
++static inline void prefix##_write_unlock(param) \
++{ au_rw_write_unlock(rwsem); } \
++static inline void prefix##_downgrade_lock(param) \
++{ au_rw_dgrade_lock(rwsem); }
++
++#define AuSimpleRwsemFuncs(prefix, param, rwsem) \
++ AuSimpleLockRwsemFuncs(prefix, param, rwsem) \
++ AuSimpleUnlockRwsemFuncs(prefix, param, rwsem)
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_RWSEM_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/sbinfo.c linux-2.6.31.5/fs/aufs/sbinfo.c
+--- linux-2.6.31.5.orig/fs/aufs/sbinfo.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/sbinfo.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,208 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * superblock private data
++ */
++
++#include "aufs.h"
++
++/*
++ * they are necessary regardless sysfs is disabled.
++ */
++void au_si_free(struct kobject *kobj)
++{
++ struct au_sbinfo *sbinfo;
++ struct super_block *sb;
++
++ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
++ AuDebugOn(!list_empty(&sbinfo->si_plink.head));
++
++ sb = sbinfo->si_sb;
++ si_write_lock(sb);
++ au_xino_clr(sb);
++ au_br_free(sbinfo);
++ kfree(sbinfo->si_branch);
++ mutex_destroy(&sbinfo->si_xib_mtx);
++ si_write_unlock(sb);
++ AuRwDestroy(&sbinfo->si_rwsem);
++
++ kfree(sbinfo);
++}
++
++int au_si_alloc(struct super_block *sb)
++{
++ int err;
++ struct au_sbinfo *sbinfo;
++
++ err = -ENOMEM;
++ sbinfo = kmalloc(sizeof(*sbinfo), GFP_NOFS);
++ if (unlikely(!sbinfo))
++ goto out;
++
++ /* will be reallocated separately */
++ sbinfo->si_branch = kzalloc(sizeof(*sbinfo->si_branch), GFP_NOFS);
++ if (unlikely(!sbinfo->si_branch))
++ goto out_sbinfo;
++
++ memset(&sbinfo->si_kobj, 0, sizeof(sbinfo->si_kobj));
++ err = sysaufs_si_init(sbinfo);
++ if (unlikely(err))
++ goto out_br;
++
++ au_nwt_init(&sbinfo->si_nowait);
++ au_rw_init_wlock(&sbinfo->si_rwsem);
++ sbinfo->si_generation = 0;
++ sbinfo->au_si_status = 0;
++ sbinfo->si_bend = -1;
++ sbinfo->si_last_br_id = 0;
++
++ sbinfo->si_wbr_copyup = AuWbrCopyup_Def;
++ sbinfo->si_wbr_create = AuWbrCreate_Def;
++ sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + AuWbrCopyup_Def;
++ sbinfo->si_wbr_create_ops = au_wbr_create_ops + AuWbrCreate_Def;
++
++ sbinfo->si_mntflags = AuOpt_Def;
++
++ sbinfo->si_xread = NULL;
++ sbinfo->si_xwrite = NULL;
++ sbinfo->si_xib = NULL;
++ mutex_init(&sbinfo->si_xib_mtx);
++ sbinfo->si_xib_buf = NULL;
++ sbinfo->si_xino_brid = -1;
++ /* leave si_xib_last_pindex and si_xib_next_bit */
++
++ sbinfo->si_rdcache = AUFS_RDCACHE_DEF * HZ;
++ sbinfo->si_rdblk = AUFS_RDBLK_DEF;
++ sbinfo->si_rdhash = AUFS_RDHASH_DEF;
++ sbinfo->si_dirwh = AUFS_DIRWH_DEF;
++
++ au_spl_init(&sbinfo->si_plink);
++ init_waitqueue_head(&sbinfo->si_plink_wq);
++
++ /* leave other members for sysaufs and si_mnt. */
++ sbinfo->si_sb = sb;
++ sb->s_fs_info = sbinfo;
++ au_debug_sbinfo_init(sbinfo);
++ return 0; /* success */
++
++ out_br:
++ kfree(sbinfo->si_branch);
++ out_sbinfo:
++ kfree(sbinfo);
++ out:
++ return err;
++}
++
++int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr)
++{
++ int err, sz;
++ struct au_branch **brp;
++
++ AuRwMustWriteLock(&sbinfo->si_rwsem);
++
++ err = -ENOMEM;
++ sz = sizeof(*brp) * (sbinfo->si_bend + 1);
++ if (unlikely(!sz))
++ sz = sizeof(*brp);
++ brp = au_kzrealloc(sbinfo->si_branch, sz, sizeof(*brp) * nbr, GFP_NOFS);
++ if (brp) {
++ sbinfo->si_branch = brp;
++ err = 0;
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++unsigned int au_sigen_inc(struct super_block *sb)
++{
++ unsigned int gen;
++
++ SiMustWriteLock(sb);
++
++ gen = ++au_sbi(sb)->si_generation;
++ au_update_digen(sb->s_root);
++ au_update_iigen(sb->s_root->d_inode);
++ sb->s_root->d_inode->i_version++;
++ return gen;
++}
++
++aufs_bindex_t au_new_br_id(struct super_block *sb)
++{
++ aufs_bindex_t br_id;
++ int i;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ for (i = 0; i <= AUFS_BRANCH_MAX; i++) {
++ br_id = ++sbinfo->si_last_br_id;
++ if (br_id && au_br_index(sb, br_id) < 0)
++ return br_id;
++ }
++
++ return -1;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* dentry and super_block lock. call at entry point */
++void aufs_read_lock(struct dentry *dentry, int flags)
++{
++ si_read_lock(dentry->d_sb, flags);
++ if (au_ftest_lock(flags, DW))
++ di_write_lock_child(dentry);
++ else
++ di_read_lock_child(dentry, flags);
++}
++
++void aufs_read_unlock(struct dentry *dentry, int flags)
++{
++ if (au_ftest_lock(flags, DW))
++ di_write_unlock(dentry);
++ else
++ di_read_unlock(dentry, flags);
++ si_read_unlock(dentry->d_sb);
++}
++
++void aufs_write_lock(struct dentry *dentry)
++{
++ si_write_lock(dentry->d_sb);
++ di_write_lock_child(dentry);
++}
++
++void aufs_write_unlock(struct dentry *dentry)
++{
++ di_write_unlock(dentry);
++ si_write_unlock(dentry->d_sb);
++}
++
++void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int flags)
++{
++ si_read_lock(d1->d_sb, flags);
++ di_write_lock2_child(d1, d2, au_ftest_lock(flags, DIR));
++}
++
++void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2)
++{
++ di_write_unlock2(d1, d2);
++ si_read_unlock(d1->d_sb);
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/spl.h linux-2.6.31.5/fs/aufs/spl.h
+--- linux-2.6.31.5.orig/fs/aufs/spl.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/spl.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,57 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * simple list protected by a spinlock
++ */
++
++#ifndef __AUFS_SPL_H__
++#define __AUFS_SPL_H__
++
++#ifdef __KERNEL__
++
++#include <linux/spinlock.h>
++#include <linux/list.h>
++
++struct au_splhead {
++ spinlock_t spin;
++ struct list_head head;
++};
++
++static inline void au_spl_init(struct au_splhead *spl)
++{
++ spin_lock_init(&spl->spin);
++ INIT_LIST_HEAD(&spl->head);
++}
++
++static inline void au_spl_add(struct list_head *list, struct au_splhead *spl)
++{
++ spin_lock(&spl->spin);
++ list_add(list, &spl->head);
++ spin_unlock(&spl->spin);
++}
++
++static inline void au_spl_del(struct list_head *list, struct au_splhead *spl)
++{
++ spin_lock(&spl->spin);
++ list_del(list);
++ spin_unlock(&spl->spin);
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_SPL_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/super.c linux-2.6.31.5/fs/aufs/super.c
+--- linux-2.6.31.5.orig/fs/aufs/super.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/super.c 2009-11-15 22:20:26.000000000 +0100
+@@ -0,0 +1,874 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * mount and super_block operations
++ */
++
++#include <linux/buffer_head.h>
++#include <linux/module.h>
++#include <linux/seq_file.h>
++#include <linux/statfs.h>
++#include "aufs.h"
++
++/*
++ * super_operations
++ */
++static struct inode *aufs_alloc_inode(struct super_block *sb __maybe_unused)
++{
++ struct au_icntnr *c;
++
++ c = au_cache_alloc_icntnr();
++ if (c) {
++ inode_init_once(&c->vfs_inode);
++ c->vfs_inode.i_version = 1; /* sigen(sb); */
++ c->iinfo.ii_hinode = NULL;
++ return &c->vfs_inode;
++ }
++ return NULL;
++}
++
++static void aufs_destroy_inode(struct inode *inode)
++{
++ au_iinfo_fin(inode);
++ au_cache_free_icntnr(container_of(inode, struct au_icntnr, vfs_inode));
++}
++
++struct inode *au_iget_locked(struct super_block *sb, ino_t ino)
++{
++ struct inode *inode;
++ int err;
++
++ inode = iget_locked(sb, ino);
++ if (unlikely(!inode)) {
++ inode = ERR_PTR(-ENOMEM);
++ goto out;
++ }
++ if (!(inode->i_state & I_NEW))
++ goto out;
++
++ err = au_xigen_new(inode);
++ if (!err)
++ err = au_iinfo_init(inode);
++ if (!err)
++ inode->i_version++;
++ else {
++ iget_failed(inode);
++ inode = ERR_PTR(err);
++ }
++
++ out:
++ /* never return NULL */
++ AuDebugOn(!inode);
++ AuTraceErrPtr(inode);
++ return inode;
++}
++
++/* lock free root dinfo */
++static int au_show_brs(struct seq_file *seq, struct super_block *sb)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ struct path path;
++ struct au_hdentry *hd;
++ struct au_branch *br;
++
++ err = 0;
++ bend = au_sbend(sb);
++ hd = au_di(sb->s_root)->di_hdentry;
++ for (bindex = 0; !err && bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ path.mnt = br->br_mnt;
++ path.dentry = hd[bindex].hd_dentry;
++ err = au_seq_path(seq, &path);
++ if (err > 0)
++ err = seq_printf(seq, "=%s",
++ au_optstr_br_perm(br->br_perm));
++ if (!err && bindex != bend)
++ err = seq_putc(seq, ':');
++ }
++
++ return err;
++}
++
++static void au_show_wbr_create(struct seq_file *m, int v,
++ struct au_sbinfo *sbinfo)
++{
++ const char *pat;
++
++ AuRwMustAnyLock(&sbinfo->si_rwsem);
++
++ seq_printf(m, ",create=");
++ pat = au_optstr_wbr_create(v);
++ switch (v) {
++ case AuWbrCreate_TDP:
++ case AuWbrCreate_RR:
++ case AuWbrCreate_MFS:
++ case AuWbrCreate_PMFS:
++ seq_printf(m, pat);
++ break;
++ case AuWbrCreate_MFSV:
++ seq_printf(m, /*pat*/"mfs:%lu",
++ sbinfo->si_wbr_mfs.mfs_expire / HZ);
++ break;
++ case AuWbrCreate_PMFSV:
++ seq_printf(m, /*pat*/"pmfs:%lu",
++ sbinfo->si_wbr_mfs.mfs_expire / HZ);
++ break;
++ case AuWbrCreate_MFSRR:
++ seq_printf(m, /*pat*/"mfsrr:%llu",
++ sbinfo->si_wbr_mfs.mfsrr_watermark);
++ break;
++ case AuWbrCreate_MFSRRV:
++ seq_printf(m, /*pat*/"mfsrr:%llu:%lu",
++ sbinfo->si_wbr_mfs.mfsrr_watermark,
++ sbinfo->si_wbr_mfs.mfs_expire / HZ);
++ break;
++ }
++}
++
++static int au_show_xino(struct seq_file *seq, struct vfsmount *mnt)
++{
++#ifdef CONFIG_SYSFS
++ return 0;
++#else
++ int err;
++ const int len = sizeof(AUFS_XINO_FNAME) - 1;
++ aufs_bindex_t bindex, brid;
++ struct super_block *sb;
++ struct qstr *name;
++ struct file *f;
++ struct dentry *d, *h_root;
++
++ AuRwMustAnyLock(&sbinfo->si_rwsem);
++
++ err = 0;
++ sb = mnt->mnt_sb;
++ f = au_sbi(sb)->si_xib;
++ if (!f)
++ goto out;
++
++ /* stop printing the default xino path on the first writable branch */
++ h_root = NULL;
++ brid = au_xino_brid(sb);
++ if (brid >= 0) {
++ bindex = au_br_index(sb, brid);
++ h_root = au_di(sb->s_root)->di_hdentry[0 + bindex].hd_dentry;
++ }
++ d = f->f_dentry;
++ name = &d->d_name;
++ /* safe ->d_parent because the file is unlinked */
++ if (d->d_parent == h_root
++ && name->len == len
++ && !memcmp(name->name, AUFS_XINO_FNAME, len))
++ goto out;
++
++ seq_puts(seq, ",xino=");
++ err = au_xino_path(seq, f);
++
++ out:
++ return err;
++#endif
++}
++
++/* seq_file will re-call me in case of too long string */
++static int aufs_show_options(struct seq_file *m, struct vfsmount *mnt)
++{
++ int err, n;
++ unsigned int mnt_flags, v;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++
++#define AuBool(name, str) do { \
++ v = au_opt_test(mnt_flags, name); \
++ if (v != au_opt_test(AuOpt_Def, name)) \
++ seq_printf(m, ",%s" #str, v ? "" : "no"); \
++} while (0)
++
++#define AuStr(name, str) do { \
++ v = mnt_flags & AuOptMask_##name; \
++ if (v != (AuOpt_Def & AuOptMask_##name)) \
++ seq_printf(m, "," #str "=%s", au_optstr_##str(v)); \
++} while (0)
++
++#define AuUInt(name, str, val) do { \
++ if (val != AUFS_##name##_DEF) \
++ seq_printf(m, "," #str "=%u", val); \
++} while (0)
++
++ /* lock free root dinfo */
++ sb = mnt->mnt_sb;
++ si_noflush_read_lock(sb);
++ sbinfo = au_sbi(sb);
++ seq_printf(m, ",si=%lx", sysaufs_si_id(sbinfo));
++
++ mnt_flags = au_mntflags(sb);
++ if (au_opt_test(mnt_flags, XINO)) {
++ err = au_show_xino(m, mnt);
++ if (unlikely(err))
++ goto out;
++ } else
++ seq_puts(m, ",noxino");
++
++ AuBool(TRUNC_XINO, trunc_xino);
++ AuStr(UDBA, udba);
++ AuBool(SHWH, shwh);
++ AuBool(PLINK, plink);
++ /* AuBool(DIRPERM1, dirperm1); */
++ /* AuBool(REFROF, refrof); */
++
++ v = sbinfo->si_wbr_create;
++ if (v != AuWbrCreate_Def)
++ au_show_wbr_create(m, v, sbinfo);
++
++ v = sbinfo->si_wbr_copyup;
++ if (v != AuWbrCopyup_Def)
++ seq_printf(m, ",cpup=%s", au_optstr_wbr_copyup(v));
++
++ v = au_opt_test(mnt_flags, ALWAYS_DIROPQ);
++ if (v != au_opt_test(AuOpt_Def, ALWAYS_DIROPQ))
++ seq_printf(m, ",diropq=%c", v ? 'a' : 'w');
++
++ AuUInt(DIRWH, dirwh, sbinfo->si_dirwh);
++
++ n = sbinfo->si_rdcache / HZ;
++ AuUInt(RDCACHE, rdcache, n);
++
++ AuUInt(RDBLK, rdblk, sbinfo->si_rdblk);
++ AuUInt(RDHASH, rdhash, sbinfo->si_rdhash);
++
++ AuBool(SUM, sum);
++ /* AuBool(SUM_W, wsum); */
++ AuBool(WARN_PERM, warn_perm);
++ AuBool(VERBOSE, verbose);
++
++ out:
++ /* be sure to print "br:" last */
++ if (!sysaufs_brs) {
++ seq_puts(m, ",br:");
++ au_show_brs(m, sb);
++ }
++ si_read_unlock(sb);
++ return 0;
++
++#undef Deleted
++#undef AuBool
++#undef AuStr
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* sum mode which returns the summation for statfs(2) */
++
++static u64 au_add_till_max(u64 a, u64 b)
++{
++ u64 old;
++
++ old = a;
++ a += b;
++ if (old < a)
++ return a;
++ return ULLONG_MAX;
++}
++
++static int au_statfs_sum(struct super_block *sb, struct kstatfs *buf)
++{
++ int err;
++ u64 blocks, bfree, bavail, files, ffree;
++ aufs_bindex_t bend, bindex, i;
++ unsigned char shared;
++ struct vfsmount *h_mnt;
++ struct super_block *h_sb;
++
++ blocks = 0;
++ bfree = 0;
++ bavail = 0;
++ files = 0;
++ ffree = 0;
++
++ err = 0;
++ bend = au_sbend(sb);
++ for (bindex = bend; bindex >= 0; bindex--) {
++ h_mnt = au_sbr_mnt(sb, bindex);
++ h_sb = h_mnt->mnt_sb;
++ shared = 0;
++ for (i = bindex + 1; !shared && i <= bend; i++)
++ shared = (au_sbr_sb(sb, i) == h_sb);
++ if (shared)
++ continue;
++
++ /* sb->s_root for NFS is unreliable */
++ err = vfs_statfs(h_mnt->mnt_root, buf);
++ if (unlikely(err))
++ goto out;
++
++ blocks = au_add_till_max(blocks, buf->f_blocks);
++ bfree = au_add_till_max(bfree, buf->f_bfree);
++ bavail = au_add_till_max(bavail, buf->f_bavail);
++ files = au_add_till_max(files, buf->f_files);
++ ffree = au_add_till_max(ffree, buf->f_ffree);
++ }
++
++ buf->f_blocks = blocks;
++ buf->f_bfree = bfree;
++ buf->f_bavail = bavail;
++ buf->f_files = files;
++ buf->f_ffree = ffree;
++
++ out:
++ return err;
++}
++
++static int aufs_statfs(struct dentry *dentry, struct kstatfs *buf)
++{
++ int err;
++ struct super_block *sb;
++
++ /* lock free root dinfo */
++ sb = dentry->d_sb;
++ si_noflush_read_lock(sb);
++ if (!au_opt_test(au_mntflags(sb), SUM))
++ /* sb->s_root for NFS is unreliable */
++ err = vfs_statfs(au_sbr_mnt(sb, 0)->mnt_root, buf);
++ else
++ err = au_statfs_sum(sb, buf);
++ si_read_unlock(sb);
++
++ if (!err) {
++ buf->f_type = AUFS_SUPER_MAGIC;
++ buf->f_namelen -= AUFS_WH_PFX_LEN;
++ memset(&buf->f_fsid, 0, sizeof(buf->f_fsid));
++ }
++ /* buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; */
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* try flushing the lower fs at aufs remount/unmount time */
++
++static void au_fsync_br(struct super_block *sb)
++{
++ aufs_bindex_t bend, bindex;
++ int brperm;
++ struct au_branch *br;
++ struct super_block *h_sb;
++
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex < bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ brperm = br->br_perm;
++ if (brperm == AuBrPerm_RR || brperm == AuBrPerm_RRWH)
++ continue;
++ h_sb = br->br_mnt->mnt_sb;
++ if (bdev_read_only(h_sb->s_bdev))
++ continue;
++
++ lockdep_off();
++ down_write(&h_sb->s_umount);
++ shrink_dcache_sb(h_sb);
++ sync_filesystem(h_sb);
++ up_write(&h_sb->s_umount);
++ lockdep_on();
++ }
++}
++
++/*
++ * this IS NOT for super_operations.
++ * I guess it will be reverted someday.
++ */
++static void aufs_umount_begin(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++
++ sbinfo = au_sbi(sb);
++ if (!sbinfo)
++ return;
++
++ si_write_lock(sb);
++ au_fsync_br(sb);
++ if (au_opt_test(au_mntflags(sb), PLINK))
++ au_plink_put(sb);
++ if (sbinfo->si_wbr_create_ops->fin)
++ sbinfo->si_wbr_create_ops->fin(sb);
++ si_write_unlock(sb);
++}
++
++/* final actions when unmounting a file system */
++static void aufs_put_super(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++
++ sbinfo = au_sbi(sb);
++ if (!sbinfo)
++ return;
++
++ aufs_umount_begin(sb);
++ dbgaufs_si_fin(sbinfo);
++ kobject_put(&sbinfo->si_kobj);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * refresh dentry and inode at remount time.
++ */
++static int do_refresh(struct dentry *dentry, mode_t type,
++ unsigned int dir_flags)
++{
++ int err;
++ struct dentry *parent;
++
++ di_write_lock_child(dentry);
++ parent = dget_parent(dentry);
++ di_read_lock_parent(parent, AuLock_IR);
++
++ /* returns the number of positive dentries */
++ err = au_refresh_hdentry(dentry, type);
++ if (err >= 0) {
++ struct inode *inode = dentry->d_inode;
++ err = au_refresh_hinode(inode, dentry);
++ if (!err && type == S_IFDIR)
++ au_reset_hinotify(inode, dir_flags);
++ }
++ if (unlikely(err))
++ AuErr("unrecoverable error %d, %.*s\n", err, AuDLNPair(dentry));
++
++ di_read_unlock(parent, AuLock_IR);
++ dput(parent);
++ di_write_unlock(dentry);
++
++ return err;
++}
++
++static int test_dir(struct dentry *dentry, void *arg __maybe_unused)
++{
++ return S_ISDIR(dentry->d_inode->i_mode);
++}
++
++/* gave up consolidating with refresh_nondir() */
++static int refresh_dir(struct dentry *root, unsigned int sigen)
++{
++ int err, i, j, ndentry, e;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++ struct dentry **dentries;
++ struct inode *inode;
++ const unsigned int flags = au_hi_flags(root->d_inode, /*isdir*/1);
++
++ err = 0;
++ list_for_each_entry(inode, &root->d_sb->s_inodes, i_sb_list)
++ if (S_ISDIR(inode->i_mode) && au_iigen(inode) != sigen) {
++ ii_write_lock_child(inode);
++ e = au_refresh_hinode_self(inode, /*do_attr*/1);
++ ii_write_unlock(inode);
++ if (unlikely(e)) {
++ AuDbg("e %d, i%lu\n", e, inode->i_ino);
++ if (!err)
++ err = e;
++ /* go on even if err */
++ }
++ }
++
++ e = au_dpages_init(&dpages, GFP_NOFS);
++ if (unlikely(e)) {
++ if (!err)
++ err = e;
++ goto out;
++ }
++ e = au_dcsub_pages(&dpages, root, test_dir, NULL);
++ if (unlikely(e)) {
++ if (!err)
++ err = e;
++ goto out_dpages;
++ }
++
++ for (i = 0; !e && i < dpages.ndpage; i++) {
++ dpage = dpages.dpages + i;
++ dentries = dpage->dentries;
++ ndentry = dpage->ndentry;
++ for (j = 0; !e && j < ndentry; j++) {
++ struct dentry *d;
++
++ d = dentries[j];
++ au_dbg_verify_dir_parent(d, sigen);
++ if (au_digen(d) != sigen) {
++ e = do_refresh(d, S_IFDIR, flags);
++ if (unlikely(e && !err))
++ err = e;
++ /* break on err */
++ }
++ }
++ }
++
++ out_dpages:
++ au_dpages_free(&dpages);
++ out:
++ return err;
++}
++
++static int test_nondir(struct dentry *dentry, void *arg __maybe_unused)
++{
++ return !S_ISDIR(dentry->d_inode->i_mode);
++}
++
++static int refresh_nondir(struct dentry *root, unsigned int sigen,
++ int do_dentry)
++{
++ int err, i, j, ndentry, e;
++ struct au_dcsub_pages dpages;
++ struct au_dpage *dpage;
++ struct dentry **dentries;
++ struct inode *inode;
++
++ err = 0;
++ list_for_each_entry(inode, &root->d_sb->s_inodes, i_sb_list)
++ if (!S_ISDIR(inode->i_mode) && au_iigen(inode) != sigen) {
++ ii_write_lock_child(inode);
++ e = au_refresh_hinode_self(inode, /*do_attr*/1);
++ ii_write_unlock(inode);
++ if (unlikely(e)) {
++ AuDbg("e %d, i%lu\n", e, inode->i_ino);
++ if (!err)
++ err = e;
++ /* go on even if err */
++ }
++ }
++
++ if (!do_dentry)
++ goto out;
++
++ e = au_dpages_init(&dpages, GFP_NOFS);
++ if (unlikely(e)) {
++ if (!err)
++ err = e;
++ goto out;
++ }
++ e = au_dcsub_pages(&dpages, root, test_nondir, NULL);
++ if (unlikely(e)) {
++ if (!err)
++ err = e;
++ goto out_dpages;
++ }
++
++ for (i = 0; i < dpages.ndpage; i++) {
++ dpage = dpages.dpages + i;
++ dentries = dpage->dentries;
++ ndentry = dpage->ndentry;
++ for (j = 0; j < ndentry; j++) {
++ struct dentry *d;
++
++ d = dentries[j];
++ au_dbg_verify_nondir_parent(d, sigen);
++ inode = d->d_inode;
++ if (inode && au_digen(d) != sigen) {
++ e = do_refresh(d, inode->i_mode & S_IFMT,
++ /*dir_flags*/0);
++ if (unlikely(e && !err))
++ err = e;
++ /* go on even err */
++ }
++ }
++ }
++
++ out_dpages:
++ au_dpages_free(&dpages);
++ out:
++ return err;
++}
++
++static void au_remount_refresh(struct super_block *sb, unsigned int flags)
++{
++ int err;
++ unsigned int sigen;
++ struct au_sbinfo *sbinfo;
++ struct dentry *root;
++ struct inode *inode;
++
++ au_sigen_inc(sb);
++ sigen = au_sigen(sb);
++ sbinfo = au_sbi(sb);
++ au_fclr_si(sbinfo, FAILED_REFRESH_DIRS);
++
++ root = sb->s_root;
++ DiMustNoWaiters(root);
++ inode = root->d_inode;
++ IiMustNoWaiters(inode);
++ au_reset_hinotify(inode, au_hi_flags(inode, /*isdir*/1));
++ di_write_unlock(root);
++
++ err = refresh_dir(root, sigen);
++ if (unlikely(err)) {
++ au_fset_si(sbinfo, FAILED_REFRESH_DIRS);
++ AuWarn("Refreshing directories failed, ignored (%d)\n", err);
++ }
++
++ if (au_ftest_opts(flags, REFRESH_NONDIR)) {
++ err = refresh_nondir(root, sigen, !err);
++ if (unlikely(err))
++ AuWarn("Refreshing non-directories failed, ignored"
++ "(%d)\n", err);
++ }
++
++ /* aufs_write_lock() calls ..._child() */
++ di_write_lock_child(root);
++ au_cpup_attr_all(root->d_inode, /*force*/1);
++}
++
++/* stop extra interpretation of errno in mount(8), and strange error messages */
++static int cvt_err(int err)
++{
++ AuTraceErr(err);
++
++ switch (err) {
++ case -ENOENT:
++ case -ENOTDIR:
++ case -EEXIST:
++ case -EIO:
++ err = -EINVAL;
++ }
++ return err;
++}
++
++static int aufs_remount_fs(struct super_block *sb, int *flags, char *data)
++{
++ int err;
++ struct au_opts opts;
++ struct dentry *root;
++ struct inode *inode;
++ struct au_sbinfo *sbinfo;
++
++ err = 0;
++ root = sb->s_root;
++ if (!data || !*data) {
++ aufs_write_lock(root);
++ err = au_opts_verify(sb, *flags, /*pending*/0);
++ if (!err)
++ au_fsync_br(sb);
++ aufs_write_unlock(root);
++ goto out;
++ }
++
++ err = -ENOMEM;
++ memset(&opts, 0, sizeof(opts));
++ opts.opt = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!opts.opt))
++ goto out;
++ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
++ opts.flags = AuOpts_REMOUNT;
++ opts.sb_flags = *flags;
++
++ /* parse it before aufs lock */
++ err = au_opts_parse(sb, data, &opts);
++ if (unlikely(err))
++ goto out_opts;
++
++ sbinfo = au_sbi(sb);
++ inode = root->d_inode;
++ mutex_lock(&inode->i_mutex);
++ aufs_write_lock(root);
++ au_fsync_br(sb);
++
++ /* au_opts_remount() may return an error */
++ err = au_opts_remount(sb, &opts);
++ au_opts_free(&opts);
++
++ if (au_ftest_opts(opts.flags, REFRESH_DIR)
++ || au_ftest_opts(opts.flags, REFRESH_NONDIR))
++ au_remount_refresh(sb, opts.flags);
++
++ aufs_write_unlock(root);
++ mutex_unlock(&inode->i_mutex);
++
++ out_opts:
++ free_page((unsigned long)opts.opt);
++ out:
++ err = cvt_err(err);
++ AuTraceErr(err);
++ return err;
++}
++
++static struct super_operations aufs_sop = {
++ .alloc_inode = aufs_alloc_inode,
++ .destroy_inode = aufs_destroy_inode,
++ .drop_inode = generic_delete_inode,
++ .show_options = aufs_show_options,
++ .statfs = aufs_statfs,
++ .put_super = aufs_put_super,
++ .remount_fs = aufs_remount_fs
++};
++
++/* ---------------------------------------------------------------------- */
++
++static int alloc_root(struct super_block *sb)
++{
++ int err;
++ struct inode *inode;
++ struct dentry *root;
++
++ err = -ENOMEM;
++ inode = au_iget_locked(sb, AUFS_ROOT_INO);
++ err = PTR_ERR(inode);
++ if (IS_ERR(inode))
++ goto out;
++
++ inode->i_op = &aufs_dir_iop;
++ inode->i_fop = &aufs_dir_fop;
++ inode->i_mode = S_IFDIR;
++ inode->i_nlink = 2;
++ unlock_new_inode(inode);
++
++ root = d_alloc_root(inode);
++ if (unlikely(!root))
++ goto out_iput;
++ err = PTR_ERR(root);
++ if (IS_ERR(root))
++ goto out_iput;
++
++ err = au_alloc_dinfo(root);
++ if (!err) {
++ sb->s_root = root;
++ return 0; /* success */
++ }
++ dput(root);
++ goto out; /* do not iput */
++
++ out_iput:
++ iget_failed(inode);
++ iput(inode);
++ out:
++ return err;
++
++}
++
++static int aufs_fill_super(struct super_block *sb, void *raw_data,
++ int silent __maybe_unused)
++{
++ int err;
++ struct au_opts opts;
++ struct dentry *root;
++ struct inode *inode;
++ char *arg = raw_data;
++
++ if (unlikely(!arg || !*arg)) {
++ err = -EINVAL;
++ AuErr("no arg\n");
++ goto out;
++ }
++
++ err = -ENOMEM;
++ memset(&opts, 0, sizeof(opts));
++ opts.opt = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!opts.opt))
++ goto out;
++ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
++ opts.sb_flags = sb->s_flags;
++
++ err = au_si_alloc(sb);
++ if (unlikely(err))
++ goto out_opts;
++
++ /* all timestamps always follow the ones on the branch */
++ sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
++ sb->s_op = &aufs_sop;
++ sb->s_magic = AUFS_SUPER_MAGIC;
++ sb->s_maxbytes = 0;
++ au_export_init(sb);
++
++ err = alloc_root(sb);
++ if (unlikely(err)) {
++ si_write_unlock(sb);
++ goto out_info;
++ }
++ root = sb->s_root;
++ inode = root->d_inode;
++
++ /*
++ * actually we can parse options regardless aufs lock here.
++ * but at remount time, parsing must be done before aufs lock.
++ * so we follow the same rule.
++ */
++ ii_write_lock_parent(inode);
++ aufs_write_unlock(root);
++ err = au_opts_parse(sb, arg, &opts);
++ if (unlikely(err))
++ goto out_root;
++
++ /* lock vfs_inode first, then aufs. */
++ mutex_lock(&inode->i_mutex);
++ inode->i_op = &aufs_dir_iop;
++ inode->i_fop = &aufs_dir_fop;
++ aufs_write_lock(root);
++ err = au_opts_mount(sb, &opts);
++ au_opts_free(&opts);
++ if (unlikely(err))
++ goto out_unlock;
++ aufs_write_unlock(root);
++ mutex_unlock(&inode->i_mutex);
++ goto out_opts; /* success */
++
++ out_unlock:
++ aufs_write_unlock(root);
++ mutex_unlock(&inode->i_mutex);
++ out_root:
++ dput(root);
++ sb->s_root = NULL;
++ out_info:
++ kobject_put(&au_sbi(sb)->si_kobj);
++ sb->s_fs_info = NULL;
++ out_opts:
++ free_page((unsigned long)opts.opt);
++ out:
++ AuTraceErr(err);
++ err = cvt_err(err);
++ AuTraceErr(err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int aufs_get_sb(struct file_system_type *fs_type, int flags,
++ const char *dev_name __maybe_unused, void *raw_data,
++ struct vfsmount *mnt)
++{
++ int err;
++ struct super_block *sb;
++
++ /* all timestamps always follow the ones on the branch */
++ /* mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME; */
++ err = get_sb_nodev(fs_type, flags, raw_data, aufs_fill_super, mnt);
++ if (!err) {
++ sb = mnt->mnt_sb;
++ si_write_lock(sb);
++ sysaufs_brs_add(sb, 0);
++ si_write_unlock(sb);
++ }
++ return err;
++}
++
++struct file_system_type aufs_fs_type = {
++ .name = AUFS_FSTYPE,
++ .fs_flags =
++ FS_RENAME_DOES_D_MOVE /* a race between rename and others */
++ | FS_REVAL_DOT, /* for NFS branch and udba */
++ .get_sb = aufs_get_sb,
++ .kill_sb = generic_shutdown_super,
++ /* no need to __module_get() and module_put(). */
++ .owner = THIS_MODULE,
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/super.h linux-2.6.31.5/fs/aufs/super.h
+--- linux-2.6.31.5.orig/fs/aufs/super.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/super.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,384 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * super_block operations
++ */
++
++#ifndef __AUFS_SUPER_H__
++#define __AUFS_SUPER_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/aufs_type.h>
++#include "rwsem.h"
++#include "spl.h"
++#include "wkq.h"
++
++typedef ssize_t (*au_readf_t)(struct file *, char __user *, size_t, loff_t *);
++typedef ssize_t (*au_writef_t)(struct file *, const char __user *, size_t,
++ loff_t *);
++
++/* policies to select one among multiple writable branches */
++struct au_wbr_copyup_operations {
++ int (*copyup)(struct dentry *dentry);
++};
++
++struct au_wbr_create_operations {
++ int (*create)(struct dentry *dentry, int isdir);
++ int (*init)(struct super_block *sb);
++ int (*fin)(struct super_block *sb);
++};
++
++struct au_wbr_mfs {
++ struct mutex mfs_lock; /* protect this structure */
++ unsigned long mfs_jiffy;
++ unsigned long mfs_expire;
++ aufs_bindex_t mfs_bindex;
++
++ unsigned long long mfsrr_bytes;
++ unsigned long long mfsrr_watermark;
++};
++
++struct au_branch;
++struct au_sbinfo {
++ /* nowait tasks in the system-wide workqueue */
++ struct au_nowait_tasks si_nowait;
++
++ struct au_rwsem si_rwsem;
++
++ /* branch management */
++ unsigned int si_generation;
++
++ /* see above flags */
++ unsigned char au_si_status;
++
++ aufs_bindex_t si_bend;
++ aufs_bindex_t si_last_br_id;
++ struct au_branch **si_branch;
++
++ /* policy to select a writable branch */
++ unsigned char si_wbr_copyup;
++ unsigned char si_wbr_create;
++ struct au_wbr_copyup_operations *si_wbr_copyup_ops;
++ struct au_wbr_create_operations *si_wbr_create_ops;
++
++ /* round robin */
++ atomic_t si_wbr_rr_next;
++
++ /* most free space */
++ struct au_wbr_mfs si_wbr_mfs;
++
++ /* mount flags */
++ /* include/asm-ia64/siginfo.h defines a macro named si_flags */
++ unsigned int si_mntflags;
++
++ /* external inode number (bitmap and translation table) */
++ au_readf_t si_xread;
++ au_writef_t si_xwrite;
++ struct file *si_xib;
++ struct mutex si_xib_mtx; /* protect xib members */
++ unsigned long *si_xib_buf;
++ unsigned long si_xib_last_pindex;
++ int si_xib_next_bit;
++ aufs_bindex_t si_xino_brid;
++ /* reserved for future use */
++ /* unsigned long long si_xib_limit; */ /* Max xib file size */
++
++#ifdef CONFIG_AUFS_EXPORT
++ /* i_generation */
++ struct file *si_xigen;
++ atomic_t si_xigen_next;
++#endif
++
++ /* vdir parameters */
++ unsigned long si_rdcache; /* max cache time in HZ */
++ unsigned int si_rdblk; /* deblk size */
++ unsigned int si_rdhash; /* hash size */
++
++ /*
++ * If the number of whiteouts are larger than si_dirwh, leave all of
++ * them after au_whtmp_ren to reduce the cost of rmdir(2).
++ * future fsck.aufs or kernel thread will remove them later.
++ * Otherwise, remove all whiteouts and the dir in rmdir(2).
++ */
++ unsigned int si_dirwh;
++
++ /*
++ * rename(2) a directory with all children.
++ */
++ /* reserved for future use */
++ /* int si_rendir; */
++
++ /* pseudo_link list */
++ struct au_splhead si_plink;
++ wait_queue_head_t si_plink_wq;
++
++ /*
++ * sysfs and lifetime management.
++ * this is not a small structure and it may be a waste of memory in case
++ * of sysfs is disabled, particulary when many aufs-es are mounted.
++ * but using sysfs is majority.
++ */
++ struct kobject si_kobj;
++#ifdef CONFIG_DEBUG_FS
++ struct dentry *si_dbgaufs, *si_dbgaufs_xib;
++#ifdef CONFIG_AUFS_EXPORT
++ struct dentry *si_dbgaufs_xigen;
++#endif
++#endif
++
++ /* dirty, necessary for unmounting, sysfs and sysrq */
++ struct super_block *si_sb;
++};
++
++/* sbinfo status flags */
++/*
++ * set true when refresh_dirs() failed at remount time.
++ * then try refreshing dirs at access time again.
++ * if it is false, refreshing dirs at access time is unnecesary
++ */
++#define AuSi_FAILED_REFRESH_DIRS 1
++#define AuSi_MAINTAIN_PLINK (1 << 1) /* ioctl */
++static inline unsigned char au_do_ftest_si(struct au_sbinfo *sbi,
++ unsigned int flag)
++{
++ AuRwMustAnyLock(&sbi->si_rwsem);
++ return sbi->au_si_status & flag;
++}
++#define au_ftest_si(sbinfo, name) au_do_ftest_si(sbinfo, AuSi_##name)
++#define au_fset_si(sbinfo, name) do { \
++ AuRwMustWriteLock(&(sbinfo)->si_rwsem); \
++ (sbinfo)->au_si_status |= AuSi_##name; \
++} while (0)
++#define au_fclr_si(sbinfo, name) do { \
++ AuRwMustWriteLock(&(sbinfo)->si_rwsem); \
++ (sbinfo)->au_si_status &= ~AuSi_##name; \
++} while (0)
++
++/* ---------------------------------------------------------------------- */
++
++/* policy to select one among writable branches */
++#define AuWbrCopyup(sbinfo, args...) \
++ ((sbinfo)->si_wbr_copyup_ops->copyup(args))
++#define AuWbrCreate(sbinfo, args...) \
++ ((sbinfo)->si_wbr_create_ops->create(args))
++
++/* flags for si_read_lock()/aufs_read_lock()/di_read_lock() */
++#define AuLock_DW 1 /* write-lock dentry */
++#define AuLock_IR (1 << 1) /* read-lock inode */
++#define AuLock_IW (1 << 2) /* write-lock inode */
++#define AuLock_FLUSH (1 << 3) /* wait for 'nowait' tasks */
++#define AuLock_DIR (1 << 4) /* target is a dir */
++#define au_ftest_lock(flags, name) ((flags) & AuLock_##name)
++#define au_fset_lock(flags, name) { (flags) |= AuLock_##name; }
++#define au_fclr_lock(flags, name) { (flags) &= ~AuLock_##name; }
++
++/* ---------------------------------------------------------------------- */
++
++/* super.c */
++extern struct file_system_type aufs_fs_type;
++struct inode *au_iget_locked(struct super_block *sb, ino_t ino);
++
++/* sbinfo.c */
++void au_si_free(struct kobject *kobj);
++int au_si_alloc(struct super_block *sb);
++int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr);
++
++unsigned int au_sigen_inc(struct super_block *sb);
++aufs_bindex_t au_new_br_id(struct super_block *sb);
++
++void aufs_read_lock(struct dentry *dentry, int flags);
++void aufs_read_unlock(struct dentry *dentry, int flags);
++void aufs_write_lock(struct dentry *dentry);
++void aufs_write_unlock(struct dentry *dentry);
++void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int isdir);
++void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2);
++
++/* wbr_policy.c */
++extern struct au_wbr_copyup_operations au_wbr_copyup_ops[];
++extern struct au_wbr_create_operations au_wbr_create_ops[];
++int au_cpdown_dirs(struct dentry *dentry, aufs_bindex_t bdst);
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct au_sbinfo *au_sbi(struct super_block *sb)
++{
++ return sb->s_fs_info;
++}
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_EXPORT
++void au_export_init(struct super_block *sb);
++
++static inline int au_test_nfsd(struct task_struct *tsk)
++{
++ return !tsk->mm && !strcmp(tsk->comm, "nfsd");
++}
++
++int au_xigen_inc(struct inode *inode);
++int au_xigen_new(struct inode *inode);
++int au_xigen_set(struct super_block *sb, struct file *base);
++void au_xigen_clr(struct super_block *sb);
++
++static inline int au_busy_or_stale(void)
++{
++ if (!au_test_nfsd(current))
++ return -EBUSY;
++ return -ESTALE;
++}
++#else
++static inline void au_export_init(struct super_block *sb)
++{
++ /* nothing */
++}
++
++static inline int au_test_nfsd(struct task_struct *tsk)
++{
++ return 0;
++}
++
++static inline int au_xigen_inc(struct inode *inode)
++{
++ return 0;
++}
++
++static inline int au_xigen_new(struct inode *inode)
++{
++ return 0;
++}
++
++static inline int au_xigen_set(struct super_block *sb, struct file *base)
++{
++ return 0;
++}
++
++static inline void au_xigen_clr(struct super_block *sb)
++{
++ /* empty */
++}
++
++static inline int au_busy_or_stale(void)
++{
++ return -EBUSY;
++}
++#endif /* CONFIG_AUFS_EXPORT */
++
++/* ---------------------------------------------------------------------- */
++
++static inline void dbgaufs_si_null(struct au_sbinfo *sbinfo)
++{
++ /*
++ * This function is a dynamic '__init' fucntion actually,
++ * so the tiny check for si_rwsem is unnecessary.
++ */
++ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
++#ifdef CONFIG_DEBUG_FS
++ sbinfo->si_dbgaufs = NULL;
++ sbinfo->si_dbgaufs_xib = NULL;
++#ifdef CONFIG_AUFS_EXPORT
++ sbinfo->si_dbgaufs_xigen = NULL;
++#endif
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* lock superblock. mainly for entry point functions */
++/*
++ * si_noflush_read_lock, si_noflush_write_lock,
++ * si_read_unlock, si_write_unlock, si_downgrade_lock
++ */
++AuSimpleLockRwsemFuncs(si_noflush, struct super_block *sb,
++ &au_sbi(sb)->si_rwsem);
++AuSimpleUnlockRwsemFuncs(si, struct super_block *sb, &au_sbi(sb)->si_rwsem);
++
++#define SiMustNoWaiters(sb) AuRwMustNoWaiters(&au_sbi(sb)->si_rwsem)
++#define SiMustAnyLock(sb) AuRwMustAnyLock(&au_sbi(sb)->si_rwsem)
++#define SiMustWriteLock(sb) AuRwMustWriteLock(&au_sbi(sb)->si_rwsem)
++
++static inline void si_read_lock(struct super_block *sb, int flags)
++{
++ if (au_ftest_lock(flags, FLUSH))
++ au_nwt_flush(&au_sbi(sb)->si_nowait);
++ si_noflush_read_lock(sb);
++}
++
++static inline void si_write_lock(struct super_block *sb)
++{
++ au_nwt_flush(&au_sbi(sb)->si_nowait);
++ si_noflush_write_lock(sb);
++}
++
++static inline int si_read_trylock(struct super_block *sb, int flags)
++{
++ if (au_ftest_lock(flags, FLUSH))
++ au_nwt_flush(&au_sbi(sb)->si_nowait);
++ return si_noflush_read_trylock(sb);
++}
++
++static inline int si_write_trylock(struct super_block *sb, int flags)
++{
++ if (au_ftest_lock(flags, FLUSH))
++ au_nwt_flush(&au_sbi(sb)->si_nowait);
++ return si_noflush_write_trylock(sb);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static inline aufs_bindex_t au_sbend(struct super_block *sb)
++{
++ SiMustAnyLock(sb);
++ return au_sbi(sb)->si_bend;
++}
++
++static inline unsigned int au_mntflags(struct super_block *sb)
++{
++ SiMustAnyLock(sb);
++ return au_sbi(sb)->si_mntflags;
++}
++
++static inline unsigned int au_sigen(struct super_block *sb)
++{
++ SiMustAnyLock(sb);
++ return au_sbi(sb)->si_generation;
++}
++
++static inline struct au_branch *au_sbr(struct super_block *sb,
++ aufs_bindex_t bindex)
++{
++ SiMustAnyLock(sb);
++ return au_sbi(sb)->si_branch[0 + bindex];
++}
++
++static inline void au_xino_brid_set(struct super_block *sb, aufs_bindex_t brid)
++{
++ SiMustWriteLock(sb);
++ au_sbi(sb)->si_xino_brid = brid;
++}
++
++static inline aufs_bindex_t au_xino_brid(struct super_block *sb)
++{
++ SiMustAnyLock(sb);
++ return au_sbi(sb)->si_xino_brid;
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_SUPER_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/sysaufs.c linux-2.6.31.5/fs/aufs/sysaufs.c
+--- linux-2.6.31.5.orig/fs/aufs/sysaufs.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/sysaufs.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,104 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sysfs interface and lifetime management
++ * they are necessary regardless sysfs is disabled.
++ */
++
++#include <linux/fs.h>
++#include <linux/random.h>
++#include <linux/sysfs.h>
++#include "aufs.h"
++
++unsigned long sysaufs_si_mask;
++struct kset *sysaufs_ket;
++
++#define AuSiAttr(_name) { \
++ .attr = { .name = __stringify(_name), .mode = 0444 }, \
++ .show = sysaufs_si_##_name, \
++}
++
++static struct sysaufs_si_attr sysaufs_si_attr_xi_path = AuSiAttr(xi_path);
++struct attribute *sysaufs_si_attrs[] = {
++ &sysaufs_si_attr_xi_path.attr,
++ NULL,
++};
++
++static struct sysfs_ops au_sbi_ops = {
++ .show = sysaufs_si_show
++};
++
++static struct kobj_type au_sbi_ktype = {
++ .release = au_si_free,
++ .sysfs_ops = &au_sbi_ops,
++ .default_attrs = sysaufs_si_attrs
++};
++
++/* ---------------------------------------------------------------------- */
++
++int sysaufs_si_init(struct au_sbinfo *sbinfo)
++{
++ int err;
++
++ sbinfo->si_kobj.kset = sysaufs_ket;
++ /* cf. sysaufs_name() */
++ err = kobject_init_and_add
++ (&sbinfo->si_kobj, &au_sbi_ktype, /*&sysaufs_ket->kobj*/NULL,
++ SysaufsSiNamePrefix "%lx", sysaufs_si_id(sbinfo));
++
++ dbgaufs_si_null(sbinfo);
++ if (!err) {
++ err = dbgaufs_si_init(sbinfo);
++ if (unlikely(err))
++ kobject_put(&sbinfo->si_kobj);
++ }
++ return err;
++}
++
++void sysaufs_fin(void)
++{
++ dbgaufs_fin();
++ sysfs_remove_group(&sysaufs_ket->kobj, sysaufs_attr_group);
++ kset_unregister(sysaufs_ket);
++}
++
++int __init sysaufs_init(void)
++{
++ int err;
++
++ do {
++ get_random_bytes(&sysaufs_si_mask, sizeof(sysaufs_si_mask));
++ } while (!sysaufs_si_mask);
++
++ sysaufs_ket = kset_create_and_add(AUFS_NAME, NULL, fs_kobj);
++ err = PTR_ERR(sysaufs_ket);
++ if (IS_ERR(sysaufs_ket))
++ goto out;
++ err = sysfs_create_group(&sysaufs_ket->kobj, sysaufs_attr_group);
++ if (unlikely(err)) {
++ kset_unregister(sysaufs_ket);
++ goto out;
++ }
++
++ err = dbgaufs_init();
++ if (unlikely(err))
++ sysaufs_fin();
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/sysaufs.h linux-2.6.31.5/fs/aufs/sysaufs.h
+--- linux-2.6.31.5.orig/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/sysaufs.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,120 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sysfs interface and mount lifetime management
++ */
++
++#ifndef __SYSAUFS_H__
++#define __SYSAUFS_H__
++
++#ifdef __KERNEL__
++
++#include <linux/sysfs.h>
++#include <linux/aufs_type.h>
++#include "module.h"
++
++struct super_block;
++struct au_sbinfo;
++
++struct sysaufs_si_attr {
++ struct attribute attr;
++ int (*show)(struct seq_file *seq, struct super_block *sb);
++};
++
++/* ---------------------------------------------------------------------- */
++
++/* sysaufs.c */
++extern unsigned long sysaufs_si_mask;
++extern struct kset *sysaufs_ket;
++extern struct attribute *sysaufs_si_attrs[];
++int sysaufs_si_init(struct au_sbinfo *sbinfo);
++int __init sysaufs_init(void);
++void sysaufs_fin(void);
++
++/* ---------------------------------------------------------------------- */
++
++/* some people doesn't like to show a pointer in kernel */
++static inline unsigned long sysaufs_si_id(struct au_sbinfo *sbinfo)
++{
++ return sysaufs_si_mask ^ (unsigned long)sbinfo;
++}
++
++#define SysaufsSiNamePrefix "si_"
++#define SysaufsSiNameLen (sizeof(SysaufsSiNamePrefix) + 16)
++static inline void sysaufs_name(struct au_sbinfo *sbinfo, char *name)
++{
++ snprintf(name, SysaufsSiNameLen, SysaufsSiNamePrefix "%lx",
++ sysaufs_si_id(sbinfo));
++}
++
++struct au_branch;
++#ifdef CONFIG_SYSFS
++/* sysfs.c */
++extern struct attribute_group *sysaufs_attr_group;
++
++int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb);
++ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
++ char *buf);
++
++void sysaufs_br_init(struct au_branch *br);
++void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex);
++void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
++
++#define sysaufs_brs_init() do {} while (0)
++
++#else
++#define sysaufs_attr_group NULL
++
++static inline
++int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb)
++{
++ return 0;
++}
++
++static inline
++ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
++ char *buf)
++{
++ return 0;
++}
++
++static inline void sysaufs_br_init(struct au_branch *br)
++{
++ /* empty */
++}
++
++static inline void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
++{
++ /* nothing */
++}
++
++static inline void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
++{
++ /* nothing */
++}
++
++static inline void sysaufs_brs_init(void)
++{
++ sysaufs_brs = 0;
++}
++
++#endif /* CONFIG_SYSFS */
++
++#endif /* __KERNEL__ */
++#endif /* __SYSAUFS_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/sysfs.c linux-2.6.31.5/fs/aufs/sysfs.c
+--- linux-2.6.31.5.orig/fs/aufs/sysfs.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/sysfs.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,210 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sysfs interface
++ */
++
++#include <linux/fs.h>
++#include <linux/module.h>
++#include <linux/seq_file.h>
++#include <linux/sysfs.h>
++#include "aufs.h"
++
++static struct attribute *au_attr[] = {
++ NULL, /* need to NULL terminate the list of attributes */
++};
++
++static struct attribute_group sysaufs_attr_group_body = {
++ .attrs = au_attr
++};
++
++struct attribute_group *sysaufs_attr_group = &sysaufs_attr_group_body;
++
++/* ---------------------------------------------------------------------- */
++
++int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb)
++{
++ int err;
++
++ SiMustAnyLock(sb);
++
++ err = 0;
++ if (au_opt_test(au_mntflags(sb), XINO)) {
++ err = au_xino_path(seq, au_sbi(sb)->si_xib);
++ seq_putc(seq, '\n');
++ }
++ return err;
++}
++
++/*
++ * the lifetime of branch is independent from the entry under sysfs.
++ * sysfs handles the lifetime of the entry, and never call ->show() after it is
++ * unlinked.
++ */
++static int sysaufs_si_br(struct seq_file *seq, struct super_block *sb,
++ aufs_bindex_t bindex)
++{
++ struct path path;
++ struct dentry *root;
++ struct au_branch *br;
++
++ AuDbg("b%d\n", bindex);
++
++ root = sb->s_root;
++ di_read_lock_parent(root, !AuLock_IR);
++ br = au_sbr(sb, bindex);
++ path.mnt = br->br_mnt;
++ path.dentry = au_h_dptr(root, bindex);
++ au_seq_path(seq, &path);
++ di_read_unlock(root, !AuLock_IR);
++ seq_printf(seq, "=%s\n", au_optstr_br_perm(br->br_perm));
++ return 0;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct seq_file *au_seq(char *p, ssize_t len)
++{
++ struct seq_file *seq;
++
++ seq = kzalloc(sizeof(*seq), GFP_NOFS);
++ if (seq) {
++ /* mutex_init(&seq.lock); */
++ seq->buf = p;
++ seq->size = len;
++ return seq; /* success */
++ }
++
++ seq = ERR_PTR(-ENOMEM);
++ return seq;
++}
++
++#define SysaufsBr_PREFIX "br"
++
++/* todo: file size may exceed PAGE_SIZE */
++ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
++ char *buf)
++{
++ ssize_t err;
++ long l;
++ aufs_bindex_t bend;
++ struct au_sbinfo *sbinfo;
++ struct super_block *sb;
++ struct seq_file *seq;
++ char *name;
++ struct attribute **cattr;
++
++ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
++ sb = sbinfo->si_sb;
++ si_noflush_read_lock(sb);
++
++ seq = au_seq(buf, PAGE_SIZE);
++ err = PTR_ERR(seq);
++ if (IS_ERR(seq))
++ goto out;
++
++ name = (void *)attr->name;
++ cattr = sysaufs_si_attrs;
++ while (*cattr) {
++ if (!strcmp(name, (*cattr)->name)) {
++ err = container_of(*cattr, struct sysaufs_si_attr, attr)
++ ->show(seq, sb);
++ goto out_seq;
++ }
++ cattr++;
++ }
++
++ bend = au_sbend(sb);
++ if (!strncmp(name, SysaufsBr_PREFIX, sizeof(SysaufsBr_PREFIX) - 1)) {
++ name += sizeof(SysaufsBr_PREFIX) - 1;
++ err = strict_strtol(name, 10, &l);
++ if (!err) {
++ if (l <= bend)
++ err = sysaufs_si_br(seq, sb, (aufs_bindex_t)l);
++ else
++ err = -ENOENT;
++ }
++ goto out_seq;
++ }
++ BUG();
++
++ out_seq:
++ if (!err) {
++ err = seq->count;
++ /* sysfs limit */
++ if (unlikely(err == PAGE_SIZE))
++ err = -EFBIG;
++ }
++ kfree(seq);
++ out:
++ si_read_unlock(sb);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++void sysaufs_br_init(struct au_branch *br)
++{
++ br->br_attr.name = br->br_name;
++ br->br_attr.mode = S_IRUGO;
++ br->br_attr.owner = THIS_MODULE;
++}
++
++void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
++{
++ struct au_branch *br;
++ struct kobject *kobj;
++ aufs_bindex_t bend;
++
++ dbgaufs_brs_del(sb, bindex);
++
++ if (!sysaufs_brs)
++ return;
++
++ kobj = &au_sbi(sb)->si_kobj;
++ bend = au_sbend(sb);
++ for (; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ sysfs_remove_file(kobj, &br->br_attr);
++ }
++}
++
++void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
++{
++ int err;
++ aufs_bindex_t bend;
++ struct kobject *kobj;
++ struct au_branch *br;
++
++ dbgaufs_brs_add(sb, bindex);
++
++ if (!sysaufs_brs)
++ return;
++
++ kobj = &au_sbi(sb)->si_kobj;
++ bend = au_sbend(sb);
++ for (; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ snprintf(br->br_name, sizeof(br->br_name), SysaufsBr_PREFIX
++ "%d", bindex);
++ err = sysfs_create_file(kobj, &br->br_attr);
++ if (unlikely(err))
++ AuWarn("failed %s under sysfs(%d)\n", br->br_name, err);
++ }
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/sysrq.c linux-2.6.31.5/fs/aufs/sysrq.c
+--- linux-2.6.31.5.orig/fs/aufs/sysrq.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/sysrq.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,115 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * magic sysrq hanlder
++ */
++
++#include <linux/fs.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++/* #include <linux/sysrq.h> */
++#include "aufs.h"
++
++/* ---------------------------------------------------------------------- */
++
++static void sysrq_sb(struct super_block *sb)
++{
++ char *plevel;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++
++ plevel = au_plevel;
++ au_plevel = KERN_WARNING;
++ au_debug(1);
++
++ sbinfo = au_sbi(sb);
++ pr_warning("si=%lx\n", sysaufs_si_id(sbinfo));
++ pr_warning(AUFS_NAME ": superblock\n");
++ au_dpri_sb(sb);
++ pr_warning(AUFS_NAME ": root dentry\n");
++ au_dpri_dentry(sb->s_root);
++ pr_warning(AUFS_NAME ": root inode\n");
++ au_dpri_inode(sb->s_root->d_inode);
++#if 0
++ struct inode *i;
++ pr_warning(AUFS_NAME ": isolated inode\n");
++ list_for_each_entry(i, &sb->s_inodes, i_sb_list)
++ if (list_empty(&i->i_dentry))
++ au_dpri_inode(i);
++#endif
++ pr_warning(AUFS_NAME ": files\n");
++ list_for_each_entry(file, &sb->s_files, f_u.fu_list)
++ if (!special_file(file->f_dentry->d_inode->i_mode))
++ au_dpri_file(file);
++
++ au_plevel = plevel;
++ au_debug(0);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* module parameter */
++static char *aufs_sysrq_key = "a";
++module_param_named(sysrq, aufs_sysrq_key, charp, S_IRUGO);
++MODULE_PARM_DESC(sysrq, "MagicSysRq key for " AUFS_NAME);
++
++static void au_sysrq(int key __maybe_unused,
++ struct tty_struct *tty __maybe_unused)
++{
++ struct kobject *kobj;
++ struct au_sbinfo *sbinfo;
++
++ /* spin_lock(&sysaufs_ket->list_lock); */
++ list_for_each_entry(kobj, &sysaufs_ket->list, entry) {
++ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
++ sysrq_sb(sbinfo->si_sb);
++ }
++ /* spin_unlock(&sysaufs_ket->list_lock); */
++}
++
++static struct sysrq_key_op au_sysrq_op = {
++ .handler = au_sysrq,
++ .help_msg = "Aufs",
++ .action_msg = "Aufs",
++ .enable_mask = SYSRQ_ENABLE_DUMP
++};
++
++/* ---------------------------------------------------------------------- */
++
++int __init au_sysrq_init(void)
++{
++ int err;
++ char key;
++
++ err = -1;
++ key = *aufs_sysrq_key;
++ if ('a' <= key && key <= 'z')
++ err = register_sysrq_key(key, &au_sysrq_op);
++ if (unlikely(err))
++ AuErr("err %d, sysrq=%c\n", err, key);
++ return err;
++}
++
++void au_sysrq_fin(void)
++{
++ int err;
++ err = unregister_sysrq_key(*aufs_sysrq_key, &au_sysrq_op);
++ if (unlikely(err))
++ AuErr("err %d (ignored)\n", err);
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/vdir.c linux-2.6.31.5/fs/aufs/vdir.c
+--- linux-2.6.31.5.orig/fs/aufs/vdir.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/vdir.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,882 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * virtual or vertical directory
++ */
++
++#include <linux/hash.h>
++#include "aufs.h"
++
++static unsigned int calc_size(int nlen)
++{
++ BUILD_BUG_ON(sizeof(ino_t) != sizeof(long));
++ return ALIGN(sizeof(struct au_vdir_de) + nlen, sizeof(ino_t));
++}
++
++static int set_deblk_end(union au_vdir_deblk_p *p,
++ union au_vdir_deblk_p *deblk_end)
++{
++ if (calc_size(0) <= deblk_end->deblk - p->deblk) {
++ p->de->de_str.len = 0;
++ /* smp_mb(); */
++ return 0;
++ }
++ return -1; /* error */
++}
++
++/* returns true or false */
++static int is_deblk_end(union au_vdir_deblk_p *p,
++ union au_vdir_deblk_p *deblk_end)
++{
++ if (calc_size(0) <= deblk_end->deblk - p->deblk)
++ return !p->de->de_str.len;
++ return 1;
++}
++
++static unsigned char *last_deblk(struct au_vdir *vdir)
++{
++ return vdir->vd_deblk[vdir->vd_nblk - 1];
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * the allocated memory has to be freed by
++ * au_nhash_wh_free() or au_nhash_de_free().
++ */
++int au_nhash_alloc(struct au_nhash *nhash, unsigned int num_hash, gfp_t gfp)
++{
++ struct hlist_head *head;
++ unsigned int u;
++
++ head = kmalloc(sizeof(*nhash->nh_head) * num_hash, gfp);
++ if (head) {
++ nhash->nh_num = num_hash;
++ nhash->nh_head = head;
++ for (u = 0; u < num_hash; u++)
++ INIT_HLIST_HEAD(head++);
++ return 0; /* success */
++ }
++
++ return -ENOMEM;
++}
++
++static void nhash_count(struct hlist_head *head)
++{
++#if 0
++ unsigned long n;
++ struct hlist_node *pos;
++
++ n = 0;
++ hlist_for_each(pos, head)
++ n++;
++ AuInfo("%lu\n", n);
++#endif
++}
++
++static void au_nhash_wh_do_free(struct hlist_head *head)
++{
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos, *node;
++
++ hlist_for_each_entry_safe(tpos, pos, node, head, wh_hash) {
++ /* hlist_del(pos); */
++ kfree(tpos);
++ }
++}
++
++static void au_nhash_de_do_free(struct hlist_head *head)
++{
++ struct au_vdir_dehstr *tpos;
++ struct hlist_node *pos, *node;
++
++ hlist_for_each_entry_safe(tpos, pos, node, head, hash) {
++ /* hlist_del(pos); */
++ au_cache_free_dehstr(tpos);
++ }
++}
++
++static void au_nhash_do_free(struct au_nhash *nhash,
++ void (*free)(struct hlist_head *head))
++{
++ unsigned int u, n;
++ struct hlist_head *head;
++
++ n = nhash->nh_num;
++ head = nhash->nh_head;
++ for (u = 0; u < n; u++) {
++ nhash_count(head);
++ free(head++);
++ }
++ kfree(nhash->nh_head);
++}
++
++void au_nhash_wh_free(struct au_nhash *whlist)
++{
++ au_nhash_do_free(whlist, au_nhash_wh_do_free);
++}
++
++static void au_nhash_de_free(struct au_nhash *delist)
++{
++ au_nhash_do_free(delist, au_nhash_de_do_free);
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_nhash_test_longer_wh(struct au_nhash *whlist, aufs_bindex_t btgt,
++ int limit)
++{
++ int num;
++ unsigned int u, n;
++ struct hlist_head *head;
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos;
++
++ num = 0;
++ n = whlist->nh_num;
++ head = whlist->nh_head;
++ for (u = 0; u < n; u++) {
++ hlist_for_each_entry(tpos, pos, head, wh_hash)
++ if (tpos->wh_bindex == btgt && ++num > limit)
++ return 1;
++ head++;
++ }
++ return 0;
++}
++
++static struct hlist_head *au_name_hash(struct au_nhash *nhash,
++ unsigned char *name,
++ unsigned int len)
++{
++ unsigned int v;
++ /* const unsigned int magic_bit = 12; */
++
++ v = 0;
++ while (len--)
++ v += *name++;
++ /* v = hash_long(v, magic_bit); */
++ v %= nhash->nh_num;
++ return nhash->nh_head + v;
++}
++
++static int au_nhash_test_name(struct au_vdir_destr *str, const char *name,
++ int nlen)
++{
++ return str->len == nlen && !memcmp(str->name, name, nlen);
++}
++
++/* returns found or not */
++int au_nhash_test_known_wh(struct au_nhash *whlist, char *name, int nlen)
++{
++ struct hlist_head *head;
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos;
++ struct au_vdir_destr *str;
++
++ head = au_name_hash(whlist, name, nlen);
++ hlist_for_each_entry(tpos, pos, head, wh_hash) {
++ str = &tpos->wh_str;
++ AuDbg("%.*s\n", str->len, str->name);
++ if (au_nhash_test_name(str, name, nlen))
++ return 1;
++ }
++ return 0;
++}
++
++/* returns found(true) or not */
++static int test_known(struct au_nhash *delist, char *name, int nlen)
++{
++ struct hlist_head *head;
++ struct au_vdir_dehstr *tpos;
++ struct hlist_node *pos;
++ struct au_vdir_destr *str;
++
++ head = au_name_hash(delist, name, nlen);
++ hlist_for_each_entry(tpos, pos, head, hash) {
++ str = tpos->str;
++ AuDbg("%.*s\n", str->len, str->name);
++ if (au_nhash_test_name(str, name, nlen))
++ return 1;
++ }
++ return 0;
++}
++
++static void au_shwh_init_wh(struct au_vdir_wh *wh, ino_t ino,
++ unsigned char d_type)
++{
++#ifdef CONFIG_AUFS_SHWH
++ wh->wh_ino = ino;
++ wh->wh_type = d_type;
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_nhash_append_wh(struct au_nhash *whlist, char *name, int nlen, ino_t ino,
++ unsigned int d_type, aufs_bindex_t bindex,
++ unsigned char shwh)
++{
++ int err;
++ struct au_vdir_destr *str;
++ struct au_vdir_wh *wh;
++
++ AuDbg("%.*s\n", nlen, name);
++ err = -ENOMEM;
++ wh = kmalloc(sizeof(*wh) + nlen, GFP_NOFS);
++ if (unlikely(!wh))
++ goto out;
++
++ err = 0;
++ wh->wh_bindex = bindex;
++ if (shwh)
++ au_shwh_init_wh(wh, ino, d_type);
++ str = &wh->wh_str;
++ str->len = nlen;
++ memcpy(str->name, name, nlen);
++ hlist_add_head(&wh->wh_hash, au_name_hash(whlist, name, nlen));
++ /* smp_mb(); */
++
++ out:
++ return err;
++}
++
++static int append_deblk(struct au_vdir *vdir)
++{
++ int err;
++ unsigned long ul;
++ const unsigned int deblk_sz = vdir->vd_deblk_sz;
++ union au_vdir_deblk_p p, deblk_end;
++ unsigned char **o;
++
++ err = -ENOMEM;
++ o = krealloc(vdir->vd_deblk, sizeof(*o) * (vdir->vd_nblk + 1),
++ GFP_NOFS);
++ if (unlikely(!o))
++ goto out;
++
++ vdir->vd_deblk = o;
++ p.deblk = kmalloc(deblk_sz, GFP_NOFS);
++ if (p.deblk) {
++ ul = vdir->vd_nblk++;
++ vdir->vd_deblk[ul] = p.deblk;
++ vdir->vd_last.ul = ul;
++ vdir->vd_last.p.deblk = p.deblk;
++ deblk_end.deblk = p.deblk + deblk_sz;
++ err = set_deblk_end(&p, &deblk_end);
++ }
++
++ out:
++ return err;
++}
++
++static int append_de(struct au_vdir *vdir, char *name, int nlen, ino_t ino,
++ unsigned int d_type, struct au_nhash *delist)
++{
++ int err;
++ unsigned int sz;
++ const unsigned int deblk_sz = vdir->vd_deblk_sz;
++ union au_vdir_deblk_p p, *room, deblk_end;
++ struct au_vdir_dehstr *dehstr;
++
++ p.deblk = last_deblk(vdir);
++ deblk_end.deblk = p.deblk + deblk_sz;
++ room = &vdir->vd_last.p;
++ AuDebugOn(room->deblk < p.deblk || deblk_end.deblk <= room->deblk
++ || !is_deblk_end(room, &deblk_end));
++
++ sz = calc_size(nlen);
++ if (unlikely(sz > deblk_end.deblk - room->deblk)) {
++ err = append_deblk(vdir);
++ if (unlikely(err))
++ goto out;
++
++ p.deblk = last_deblk(vdir);
++ deblk_end.deblk = p.deblk + deblk_sz;
++ /* smp_mb(); */
++ AuDebugOn(room->deblk != p.deblk);
++ }
++
++ err = -ENOMEM;
++ dehstr = au_cache_alloc_dehstr();
++ if (unlikely(!dehstr))
++ goto out;
++
++ dehstr->str = &room->de->de_str;
++ hlist_add_head(&dehstr->hash, au_name_hash(delist, name, nlen));
++ room->de->de_ino = ino;
++ room->de->de_type = d_type;
++ room->de->de_str.len = nlen;
++ memcpy(room->de->de_str.name, name, nlen);
++
++ err = 0;
++ room->deblk += sz;
++ if (unlikely(set_deblk_end(room, &deblk_end)))
++ err = append_deblk(vdir);
++ /* smp_mb(); */
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_vdir_free(struct au_vdir *vdir)
++{
++ unsigned char **deblk;
++
++ deblk = vdir->vd_deblk;
++ while (vdir->vd_nblk--)
++ kfree(*deblk++);
++ kfree(vdir->vd_deblk);
++ au_cache_free_vdir(vdir);
++}
++
++static struct au_vdir *alloc_vdir(struct super_block *sb)
++{
++ struct au_vdir *vdir;
++ int err;
++
++ SiMustAnyLock(sb);
++
++ err = -ENOMEM;
++ vdir = au_cache_alloc_vdir();
++ if (unlikely(!vdir))
++ goto out;
++
++ vdir->vd_deblk = kzalloc(sizeof(*vdir->vd_deblk), GFP_NOFS);
++ if (unlikely(!vdir->vd_deblk))
++ goto out_free;
++
++ vdir->vd_deblk_sz = au_sbi(sb)->si_rdblk;
++ vdir->vd_nblk = 0;
++ vdir->vd_version = 0;
++ vdir->vd_jiffy = 0;
++ err = append_deblk(vdir);
++ if (!err)
++ return vdir; /* success */
++
++ kfree(vdir->vd_deblk);
++
++ out_free:
++ au_cache_free_vdir(vdir);
++ out:
++ vdir = ERR_PTR(err);
++ return vdir;
++}
++
++static int reinit_vdir(struct au_vdir *vdir)
++{
++ int err;
++ union au_vdir_deblk_p p, deblk_end;
++
++ while (vdir->vd_nblk > 1) {
++ kfree(vdir->vd_deblk[vdir->vd_nblk - 1]);
++ /* vdir->vd_deblk[vdir->vd_nblk - 1] = NULL; */
++ vdir->vd_nblk--;
++ }
++ p.deblk = vdir->vd_deblk[0];
++ deblk_end.deblk = p.deblk + vdir->vd_deblk_sz;
++ err = set_deblk_end(&p, &deblk_end);
++ /* keep vd_dblk_sz */
++ vdir->vd_last.ul = 0;
++ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
++ vdir->vd_version = 0;
++ vdir->vd_jiffy = 0;
++ /* smp_mb(); */
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_ino(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ unsigned int d_type, ino_t *ino)
++{
++ int err;
++ struct mutex *mtx;
++ const int isdir = (d_type == DT_DIR);
++
++ /* prevent hardlinks from race condition */
++ mtx = NULL;
++ if (!isdir) {
++ mtx = &au_sbr(sb, bindex)->br_xino.xi_nondir_mtx;
++ mutex_lock(mtx);
++ }
++ err = au_xino_read(sb, bindex, h_ino, ino);
++ if (unlikely(err))
++ goto out;
++
++ if (!*ino) {
++ err = -EIO;
++ *ino = au_xino_new_ino(sb);
++ if (unlikely(!*ino))
++ goto out;
++ err = au_xino_write(sb, bindex, h_ino, *ino);
++ if (unlikely(err))
++ goto out;
++ }
++
++ out:
++ if (!isdir)
++ mutex_unlock(mtx);
++ return err;
++}
++
++static int au_wh_ino(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ unsigned int d_type, ino_t *ino)
++{
++#ifdef CONFIG_AUFS_SHWH
++ return au_ino(sb, bindex, h_ino, d_type, ino);
++#else
++ return 0;
++#endif
++}
++
++#define AuFillVdir_CALLED 1
++#define AuFillVdir_WHABLE (1 << 1)
++#define AuFillVdir_SHWH (1 << 2)
++#define au_ftest_fillvdir(flags, name) ((flags) & AuFillVdir_##name)
++#define au_fset_fillvdir(flags, name) { (flags) |= AuFillVdir_##name; }
++#define au_fclr_fillvdir(flags, name) { (flags) &= ~AuFillVdir_##name; }
++
++#ifndef CONFIG_AUFS_SHWH
++#undef AuFillVdir_SHWH
++#define AuFillVdir_SHWH 0
++#endif
++
++struct fillvdir_arg {
++ struct file *file;
++ struct au_vdir *vdir;
++ struct au_nhash delist;
++ struct au_nhash whlist;
++ aufs_bindex_t bindex;
++ unsigned int flags;
++ int err;
++};
++
++static int fillvdir(void *__arg, const char *__name, int nlen,
++ loff_t offset __maybe_unused, u64 h_ino,
++ unsigned int d_type)
++{
++ struct fillvdir_arg *arg = __arg;
++ char *name = (void *)__name;
++ struct super_block *sb;
++ ino_t ino;
++ const unsigned char shwh = !!au_ftest_fillvdir(arg->flags, SHWH);
++
++ arg->err = 0;
++ sb = arg->file->f_dentry->d_sb;
++ au_fset_fillvdir(arg->flags, CALLED);
++ /* smp_mb(); */
++ if (nlen <= AUFS_WH_PFX_LEN
++ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
++ if (test_known(&arg->delist, name, nlen)
++ || au_nhash_test_known_wh(&arg->whlist, name, nlen))
++ goto out; /* already exists or whiteouted */
++
++ sb = arg->file->f_dentry->d_sb;
++ arg->err = au_ino(sb, arg->bindex, h_ino, d_type, &ino);
++ if (!arg->err)
++ arg->err = append_de(arg->vdir, name, nlen, ino,
++ d_type, &arg->delist);
++ } else if (au_ftest_fillvdir(arg->flags, WHABLE)) {
++ name += AUFS_WH_PFX_LEN;
++ nlen -= AUFS_WH_PFX_LEN;
++ if (au_nhash_test_known_wh(&arg->whlist, name, nlen))
++ goto out; /* already whiteouted */
++
++ if (shwh)
++ arg->err = au_wh_ino(sb, arg->bindex, h_ino, d_type,
++ &ino);
++ if (!arg->err)
++ arg->err = au_nhash_append_wh
++ (&arg->whlist, name, nlen, ino, d_type,
++ arg->bindex, shwh);
++ }
++
++ out:
++ if (!arg->err)
++ arg->vdir->vd_jiffy = jiffies;
++ /* smp_mb(); */
++ AuTraceErr(arg->err);
++ return arg->err;
++}
++
++static int au_handle_shwh(struct super_block *sb, struct au_vdir *vdir,
++ struct au_nhash *whlist, struct au_nhash *delist)
++{
++#ifdef CONFIG_AUFS_SHWH
++ int err;
++ unsigned int nh, u;
++ struct hlist_head *head;
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos, *n;
++ char *p, *o;
++ struct au_vdir_destr *destr;
++
++ AuDebugOn(!au_opt_test(au_mntflags(sb), SHWH));
++
++ err = -ENOMEM;
++ o = p = __getname();
++ if (unlikely(!p))
++ goto out;
++
++ err = 0;
++ nh = whlist->nh_num;
++ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
++ p += AUFS_WH_PFX_LEN;
++ for (u = 0; u < nh; u++) {
++ head = whlist->nh_head + u;
++ hlist_for_each_entry_safe(tpos, pos, n, head, wh_hash) {
++ destr = &tpos->wh_str;
++ memcpy(p, destr->name, destr->len);
++ err = append_de(vdir, o, destr->len + AUFS_WH_PFX_LEN,
++ tpos->wh_ino, tpos->wh_type, delist);
++ if (unlikely(err))
++ break;
++ }
++ }
++
++ __putname(o);
++
++ out:
++ AuTraceErr(err);
++ return err;
++#else
++ return 0;
++#endif
++}
++
++static int au_do_read_vdir(struct fillvdir_arg *arg)
++{
++ int err;
++ unsigned int rdhash;
++ loff_t offset;
++ aufs_bindex_t bend, bindex, bstart;
++ unsigned char shwh;
++ struct file *hf, *file;
++ struct super_block *sb;
++
++ file = arg->file;
++ sb = file->f_dentry->d_sb;
++ SiMustAnyLock(sb);
++
++ rdhash = au_sbi(sb)->si_rdhash;
++ err = au_nhash_alloc(&arg->delist, rdhash, GFP_NOFS);
++ if (unlikely(err))
++ goto out;
++ err = au_nhash_alloc(&arg->whlist, rdhash, GFP_NOFS);
++ if (unlikely(err))
++ goto out_delist;
++
++ err = 0;
++ arg->flags = 0;
++ shwh = 0;
++ if (au_opt_test(au_mntflags(sb), SHWH)) {
++ shwh = 1;
++ au_fset_fillvdir(arg->flags, SHWH);
++ }
++ bstart = au_fbstart(file);
++ bend = au_fbend(file);
++ for (bindex = bstart; !err && bindex <= bend; bindex++) {
++ hf = au_h_fptr(file, bindex);
++ if (!hf)
++ continue;
++
++ offset = vfsub_llseek(hf, 0, SEEK_SET);
++ err = offset;
++ if (unlikely(offset))
++ break;
++
++ arg->bindex = bindex;
++ au_fclr_fillvdir(arg->flags, WHABLE);
++ if (shwh
++ || (bindex != bend
++ && au_br_whable(au_sbr_perm(sb, bindex))))
++ au_fset_fillvdir(arg->flags, WHABLE);
++ do {
++ arg->err = 0;
++ au_fclr_fillvdir(arg->flags, CALLED);
++ /* smp_mb(); */
++ err = vfsub_readdir(hf, fillvdir, arg);
++ if (err >= 0)
++ err = arg->err;
++ } while (!err && au_ftest_fillvdir(arg->flags, CALLED));
++ }
++
++ if (!err && shwh)
++ err = au_handle_shwh(sb, arg->vdir, &arg->whlist, &arg->delist);
++
++ au_nhash_wh_free(&arg->whlist);
++
++ out_delist:
++ au_nhash_de_free(&arg->delist);
++ out:
++ return err;
++}
++
++static int read_vdir(struct file *file, int may_read)
++{
++ int err;
++ unsigned long expire;
++ unsigned char do_read;
++ struct fillvdir_arg arg;
++ struct inode *inode;
++ struct au_vdir *vdir, *allocated;
++
++ err = 0;
++ inode = file->f_dentry->d_inode;
++ IMustLock(inode);
++ SiMustAnyLock(inode->i_sb);
++
++ allocated = NULL;
++ do_read = 0;
++ expire = au_sbi(inode->i_sb)->si_rdcache;
++ vdir = au_ivdir(inode);
++ if (!vdir) {
++ do_read = 1;
++ vdir = alloc_vdir(inode->i_sb);
++ err = PTR_ERR(vdir);
++ if (IS_ERR(vdir))
++ goto out;
++ err = 0;
++ allocated = vdir;
++ } else if (may_read
++ && (inode->i_version != vdir->vd_version
++ || time_after(jiffies, vdir->vd_jiffy + expire))) {
++ do_read = 1;
++ err = reinit_vdir(vdir);
++ if (unlikely(err))
++ goto out;
++ }
++
++ if (!do_read)
++ return 0; /* success */
++
++ arg.file = file;
++ arg.vdir = vdir;
++ err = au_do_read_vdir(&arg);
++ if (!err) {
++ /* file->f_pos = 0; */
++ vdir->vd_version = inode->i_version;
++ vdir->vd_last.ul = 0;
++ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
++ if (allocated)
++ au_set_ivdir(inode, allocated);
++ } else if (allocated)
++ au_vdir_free(allocated);
++
++ out:
++ return err;
++}
++
++static int copy_vdir(struct au_vdir *tgt, struct au_vdir *src)
++{
++ int err, rerr;
++ unsigned long ul, n;
++ const unsigned int deblk_sz = src->vd_deblk_sz;
++
++ AuDebugOn(tgt->vd_nblk != 1);
++
++ err = -ENOMEM;
++ if (tgt->vd_nblk < src->vd_nblk) {
++ unsigned char **p;
++
++ p = krealloc(tgt->vd_deblk, sizeof(*p) * src->vd_nblk,
++ GFP_NOFS);
++ if (unlikely(!p))
++ goto out;
++ tgt->vd_deblk = p;
++ }
++
++ tgt->vd_nblk = src->vd_nblk;
++ tgt->vd_deblk_sz = deblk_sz;
++ memcpy(tgt->vd_deblk[0], src->vd_deblk[0], deblk_sz);
++ /* tgt->vd_last.i = 0; */
++ /* tgt->vd_last.p.deblk = tgt->vd_deblk[0]; */
++ tgt->vd_version = src->vd_version;
++ tgt->vd_jiffy = src->vd_jiffy;
++
++ n = src->vd_nblk;
++ for (ul = 1; ul < n; ul++) {
++ tgt->vd_deblk[ul] = kmemdup(src->vd_deblk[ul], deblk_sz,
++ GFP_NOFS);
++ if (unlikely(!tgt->vd_deblk[ul]))
++ goto out;
++ }
++ /* smp_mb(); */
++ return 0; /* success */
++
++ out:
++ rerr = reinit_vdir(tgt);
++ BUG_ON(rerr);
++ return err;
++}
++
++int au_vdir_init(struct file *file)
++{
++ int err;
++ struct inode *inode;
++ struct au_vdir *vdir_cache, *allocated;
++
++ err = read_vdir(file, !file->f_pos);
++ if (unlikely(err))
++ goto out;
++
++ allocated = NULL;
++ vdir_cache = au_fvdir_cache(file);
++ if (!vdir_cache) {
++ vdir_cache = alloc_vdir(file->f_dentry->d_sb);
++ err = PTR_ERR(vdir_cache);
++ if (IS_ERR(vdir_cache))
++ goto out;
++ allocated = vdir_cache;
++ } else if (!file->f_pos && vdir_cache->vd_version != file->f_version) {
++ err = reinit_vdir(vdir_cache);
++ if (unlikely(err))
++ goto out;
++ } else
++ return 0; /* success */
++
++ inode = file->f_dentry->d_inode;
++ err = copy_vdir(vdir_cache, au_ivdir(inode));
++ if (!err) {
++ file->f_version = inode->i_version;
++ if (allocated)
++ au_set_fvdir_cache(file, allocated);
++ } else if (allocated)
++ au_vdir_free(allocated);
++
++ out:
++ return err;
++}
++
++static loff_t calc_offset(struct au_vdir *vdir)
++{
++ loff_t offset;
++ union au_vdir_deblk_p p;
++
++ p.deblk = vdir->vd_deblk[vdir->vd_last.ul];
++ offset = vdir->vd_last.p.deblk - p.deblk;
++ offset += vdir->vd_deblk_sz * vdir->vd_last.ul;
++ return offset;
++}
++
++/* returns true or false */
++static int seek_vdir(struct file *file)
++{
++ int valid;
++ unsigned int deblk_sz;
++ unsigned long ul, n;
++ loff_t offset;
++ union au_vdir_deblk_p p, deblk_end;
++ struct au_vdir *vdir_cache;
++
++ valid = 1;
++ vdir_cache = au_fvdir_cache(file);
++ offset = calc_offset(vdir_cache);
++ AuDbg("offset %lld\n", offset);
++ if (file->f_pos == offset)
++ goto out;
++
++ vdir_cache->vd_last.ul = 0;
++ vdir_cache->vd_last.p.deblk = vdir_cache->vd_deblk[0];
++ if (!file->f_pos)
++ goto out;
++
++ valid = 0;
++ deblk_sz = vdir_cache->vd_deblk_sz;
++ ul = div64_u64(file->f_pos, deblk_sz);
++ AuDbg("ul %lu\n", ul);
++ if (ul >= vdir_cache->vd_nblk)
++ goto out;
++
++ n = vdir_cache->vd_nblk;
++ for (; ul < n; ul++) {
++ p.deblk = vdir_cache->vd_deblk[ul];
++ deblk_end.deblk = p.deblk + deblk_sz;
++ offset = ul;
++ offset *= deblk_sz;
++ while (!is_deblk_end(&p, &deblk_end) && offset < file->f_pos) {
++ unsigned int l;
++
++ l = calc_size(p.de->de_str.len);
++ offset += l;
++ p.deblk += l;
++ }
++ if (!is_deblk_end(&p, &deblk_end)) {
++ valid = 1;
++ vdir_cache->vd_last.ul = ul;
++ vdir_cache->vd_last.p = p;
++ break;
++ }
++ }
++
++ out:
++ /* smp_mb(); */
++ AuTraceErr(!valid);
++ return valid;
++}
++
++int au_vdir_fill_de(struct file *file, void *dirent, filldir_t filldir)
++{
++ int err;
++ unsigned int l, deblk_sz;
++ union au_vdir_deblk_p deblk_end;
++ struct au_vdir *vdir_cache;
++ struct au_vdir_de *de;
++
++ vdir_cache = au_fvdir_cache(file);
++ if (!seek_vdir(file))
++ return 0;
++
++ deblk_sz = vdir_cache->vd_deblk_sz;
++ while (1) {
++ deblk_end.deblk = vdir_cache->vd_deblk[vdir_cache->vd_last.ul];
++ deblk_end.deblk += deblk_sz;
++ while (!is_deblk_end(&vdir_cache->vd_last.p, &deblk_end)) {
++ de = vdir_cache->vd_last.p.de;
++ AuDbg("%.*s, off%lld, i%lu, dt%d\n",
++ de->de_str.len, de->de_str.name, file->f_pos,
++ (unsigned long)de->de_ino, de->de_type);
++ err = filldir(dirent, de->de_str.name, de->de_str.len,
++ file->f_pos, de->de_ino, de->de_type);
++ if (unlikely(err)) {
++ AuTraceErr(err);
++ /* todo: ignore the error caused by udba? */
++ /* return err; */
++ return 0;
++ }
++
++ l = calc_size(de->de_str.len);
++ vdir_cache->vd_last.p.deblk += l;
++ file->f_pos += l;
++ }
++ if (vdir_cache->vd_last.ul < vdir_cache->vd_nblk - 1) {
++ vdir_cache->vd_last.ul++;
++ vdir_cache->vd_last.p.deblk
++ = vdir_cache->vd_deblk[vdir_cache->vd_last.ul];
++ file->f_pos = deblk_sz * vdir_cache->vd_last.ul;
++ continue;
++ }
++ break;
++ }
++
++ /* smp_mb(); */
++ return 0;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/vfsub.c linux-2.6.31.5/fs/aufs/vfsub.c
+--- linux-2.6.31.5.orig/fs/aufs/vfsub.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/vfsub.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,740 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sub-routines for VFS
++ */
++
++#include <linux/namei.h>
++#include <linux/security.h>
++#include <linux/splice.h>
++#include <linux/uaccess.h>
++#include "aufs.h"
++
++int vfsub_update_h_iattr(struct path *h_path, int *did)
++{
++ int err;
++ struct kstat st;
++ struct super_block *h_sb;
++
++ /* for remote fs, leave work for its getattr or d_revalidate */
++ /* for bad i_attr fs, handle them in aufs_getattr() */
++ /* still some fs may acquire i_mutex. we need to skip them */
++ err = 0;
++ if (!did)
++ did = &err;
++ h_sb = h_path->dentry->d_sb;
++ *did = (!au_test_fs_remote(h_sb) && au_test_fs_refresh_iattr(h_sb));
++ if (*did)
++ err = vfs_getattr(h_path->mnt, h_path->dentry, &st);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_IMA
++#error IMA is not supported since it does not work well. Wait for their fixing.
++#endif
++
++struct file *vfsub_filp_open(const char *path, int oflags, int mode)
++{
++ struct file *file;
++
++ lockdep_off();
++ file = filp_open(path, oflags, mode);
++ lockdep_on();
++ if (IS_ERR(file))
++ goto out;
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
++
++ out:
++ return file;
++}
++
++int vfsub_kern_path(const char *name, unsigned int flags, struct path *path)
++{
++ int err;
++
++ /* lockdep_off(); */
++ err = kern_path(name, flags, path);
++ /* lockdep_on(); */
++ if (!err && path->dentry->d_inode)
++ vfsub_update_h_iattr(path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
++ int len)
++{
++ struct path path = {
++ .mnt = NULL
++ };
++
++ IMustLock(parent->d_inode);
++
++ path.dentry = lookup_one_len(name, parent, len);
++ if (IS_ERR(path.dentry))
++ goto out;
++ if (path.dentry->d_inode)
++ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/
++
++ out:
++ return path.dentry;
++}
++
++struct dentry *vfsub_lookup_hash(struct nameidata *nd)
++{
++ struct path path = {
++ .mnt = nd->path.mnt
++ };
++
++ IMustLock(nd->path.dentry->d_inode);
++
++ path.dentry = lookup_hash(nd);
++ if (!IS_ERR(path.dentry) && path.dentry->d_inode)
++ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/
++
++ return path.dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct dentry *vfsub_lock_rename(struct dentry *d1, struct au_hinode *hdir1,
++ struct dentry *d2, struct au_hinode *hdir2)
++{
++ struct dentry *d;
++
++ lockdep_off();
++ d = lock_rename(d1, d2);
++ lockdep_on();
++ au_hin_suspend(hdir1);
++ if (hdir1 != hdir2)
++ au_hin_suspend(hdir2);
++
++ return d;
++}
++
++void vfsub_unlock_rename(struct dentry *d1, struct au_hinode *hdir1,
++ struct dentry *d2, struct au_hinode *hdir2)
++{
++ au_hin_resume(hdir1);
++ if (hdir1 != hdir2)
++ au_hin_resume(hdir2);
++ lockdep_off();
++ unlock_rename(d1, d2);
++ lockdep_on();
++}
++
++/* ---------------------------------------------------------------------- */
++
++int vfsub_create(struct inode *dir, struct path *path, int mode)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_mknod(path, path->dentry, mode, 0);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ if (au_test_fs_null_nd(dir->i_sb))
++ err = vfs_create(dir, path->dentry, mode, NULL);
++ else {
++ struct nameidata h_nd;
++
++ memset(&h_nd, 0, sizeof(h_nd));
++ h_nd.flags = LOOKUP_CREATE;
++ h_nd.intent.open.flags = O_CREAT
++ | vfsub_fmode_to_uint(FMODE_READ);
++ h_nd.intent.open.create_mode = mode;
++ h_nd.path.dentry = path->dentry->d_parent;
++ h_nd.path.mnt = path->mnt;
++ path_get(&h_nd.path);
++ err = vfs_create(dir, path->dentry, mode, &h_nd);
++ path_put(&h_nd.path);
++ }
++
++ if (!err) {
++ struct path tmp = *path;
++ int did;
++
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = path->dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++int vfsub_symlink(struct inode *dir, struct path *path, const char *symname)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_symlink(path, path->dentry, symname);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ err = vfs_symlink(dir, path->dentry, symname);
++ if (!err) {
++ struct path tmp = *path;
++ int did;
++
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = path->dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++int vfsub_mknod(struct inode *dir, struct path *path, int mode, dev_t dev)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_mknod(path, path->dentry, mode, dev);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ err = vfs_mknod(dir, path->dentry, mode, dev);
++ if (!err) {
++ struct path tmp = *path;
++ int did;
++
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = path->dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++static int au_test_nlink(struct inode *inode)
++{
++ const unsigned int link_max = UINT_MAX >> 1; /* rough margin */
++
++ if (!au_test_fs_no_limit_nlink(inode->i_sb)
++ || inode->i_nlink < link_max)
++ return 0;
++ return -EMLINK;
++}
++
++int vfsub_link(struct dentry *src_dentry, struct inode *dir, struct path *path)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ err = au_test_nlink(src_dentry->d_inode);
++ if (unlikely(err))
++ return err;
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_link(src_dentry, path, path->dentry);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ lockdep_off();
++ err = vfs_link(src_dentry, dir, path->dentry);
++ lockdep_on();
++ if (!err) {
++ struct path tmp = *path;
++ int did;
++
++ /* fuse has different memory inode for the same inumber */
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = path->dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ tmp.dentry = src_dentry;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
++ struct inode *dir, struct path *path)
++{
++ int err;
++ struct path tmp = {
++ .mnt = path->mnt
++ };
++ struct dentry *d;
++
++ IMustLock(dir);
++ IMustLock(src_dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ tmp.dentry = src_dentry->d_parent;
++ err = security_path_rename(&tmp, src_dentry, path, path->dentry);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ lockdep_off();
++ err = vfs_rename(src_dir, src_dentry, dir, path->dentry);
++ lockdep_on();
++ if (!err) {
++ int did;
++
++ tmp.dentry = d->d_parent;
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = src_dentry;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ tmp.dentry = src_dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++int vfsub_mkdir(struct inode *dir, struct path *path, int mode)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_mkdir(path, path->dentry, mode);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ err = vfs_mkdir(dir, path->dentry, mode);
++ if (!err) {
++ struct path tmp = *path;
++ int did;
++
++ vfsub_update_h_iattr(&tmp, &did);
++ if (did) {
++ tmp.dentry = path->dentry->d_parent;
++ vfsub_update_h_iattr(&tmp, /*did*/NULL);
++ }
++ /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++int vfsub_rmdir(struct inode *dir, struct path *path)
++{
++ int err;
++ struct dentry *d;
++
++ IMustLock(dir);
++
++ d = path->dentry;
++ path->dentry = d->d_parent;
++ err = security_path_rmdir(path, path->dentry);
++ path->dentry = d;
++ if (unlikely(err))
++ goto out;
++
++ lockdep_off();
++ err = vfs_rmdir(dir, path->dentry);
++ lockdep_on();
++ if (!err) {
++ struct path tmp = {
++ .dentry = path->dentry->d_parent,
++ .mnt = path->mnt
++ };
++
++ vfsub_update_h_iattr(&tmp, /*did*/NULL); /*ignore*/
++ }
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
++ loff_t *ppos)
++{
++ ssize_t err;
++
++ err = vfs_read(file, ubuf, count, ppos);
++ if (err >= 0)
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++/* todo: kernel_read()? */
++ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count,
++ loff_t *ppos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ err = vfsub_read_u(file, (char __user *)kbuf, count, ppos);
++ set_fs(oldfs);
++ return err;
++}
++
++ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
++ loff_t *ppos)
++{
++ ssize_t err;
++
++ lockdep_off();
++ err = vfs_write(file, ubuf, count, ppos);
++ lockdep_on();
++ if (err >= 0)
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ err = vfsub_write_u(file, (const char __user *)kbuf, count, ppos);
++ set_fs(oldfs);
++ return err;
++}
++
++int vfsub_readdir(struct file *file, filldir_t filldir, void *arg)
++{
++ int err;
++
++ lockdep_off();
++ err = vfs_readdir(file, filldir, arg);
++ lockdep_on();
++ if (err >= 0)
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++long vfsub_splice_to(struct file *in, loff_t *ppos,
++ struct pipe_inode_info *pipe, size_t len,
++ unsigned int flags)
++{
++ long err;
++
++ lockdep_off();
++ err = do_splice_to(in, ppos, pipe, len, flags);
++ lockdep_on();
++ if (err >= 0)
++ vfsub_update_h_iattr(&in->f_path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out,
++ loff_t *ppos, size_t len, unsigned int flags)
++{
++ long err;
++
++ lockdep_off();
++ err = do_splice_from(pipe, out, ppos, len, flags);
++ lockdep_on();
++ if (err >= 0)
++ vfsub_update_h_iattr(&out->f_path, /*did*/NULL); /*ignore*/
++ return err;
++}
++
++/* cf. open.c:do_sys_truncate() and do_sys_ftruncate() */
++int vfsub_trunc(struct path *h_path, loff_t length, unsigned int attr,
++ struct file *h_file)
++{
++ int err;
++ struct inode *h_inode;
++
++ h_inode = h_path->dentry->d_inode;
++ if (!h_file) {
++ err = mnt_want_write(h_path->mnt);
++ if (err)
++ goto out;
++ err = inode_permission(h_inode, MAY_WRITE);
++ if (err)
++ goto out_mnt;
++ err = get_write_access(h_inode);
++ if (err)
++ goto out_mnt;
++ err = break_lease(h_inode, vfsub_fmode_to_uint(FMODE_WRITE));
++ if (err)
++ goto out_inode;
++ }
++
++ err = locks_verify_truncate(h_inode, h_file, length);
++ if (!err)
++ err = security_path_truncate(h_path, length, attr);
++ if (!err) {
++ lockdep_off();
++ err = do_truncate(h_path->dentry, length, attr, h_file);
++ lockdep_on();
++ }
++
++ out_inode:
++ if (!h_file)
++ put_write_access(h_inode);
++ out_mnt:
++ if (!h_file)
++ mnt_drop_write(h_path->mnt);
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct au_vfsub_mkdir_args {
++ int *errp;
++ struct inode *dir;
++ struct path *path;
++ int mode;
++};
++
++static void au_call_vfsub_mkdir(void *args)
++{
++ struct au_vfsub_mkdir_args *a = args;
++ *a->errp = vfsub_mkdir(a->dir, a->path, a->mode);
++}
++
++int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode)
++{
++ int err, do_sio, wkq_err;
++
++ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
++ if (!do_sio)
++ err = vfsub_mkdir(dir, path, mode);
++ else {
++ struct au_vfsub_mkdir_args args = {
++ .errp = &err,
++ .dir = dir,
++ .path = path,
++ .mode = mode
++ };
++ wkq_err = au_wkq_wait(au_call_vfsub_mkdir, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ return err;
++}
++
++struct au_vfsub_rmdir_args {
++ int *errp;
++ struct inode *dir;
++ struct path *path;
++};
++
++static void au_call_vfsub_rmdir(void *args)
++{
++ struct au_vfsub_rmdir_args *a = args;
++ *a->errp = vfsub_rmdir(a->dir, a->path);
++}
++
++int vfsub_sio_rmdir(struct inode *dir, struct path *path)
++{
++ int err, do_sio, wkq_err;
++
++ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
++ if (!do_sio)
++ err = vfsub_rmdir(dir, path);
++ else {
++ struct au_vfsub_rmdir_args args = {
++ .errp = &err,
++ .dir = dir,
++ .path = path
++ };
++ wkq_err = au_wkq_wait(au_call_vfsub_rmdir, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct notify_change_args {
++ int *errp;
++ struct path *path;
++ struct iattr *ia;
++};
++
++static void call_notify_change(void *args)
++{
++ struct notify_change_args *a = args;
++ struct inode *h_inode;
++
++ h_inode = a->path->dentry->d_inode;
++ IMustLock(h_inode);
++
++ *a->errp = -EPERM;
++ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
++ lockdep_off();
++ *a->errp = notify_change(a->path->dentry, a->ia);
++ lockdep_on();
++ if (!*a->errp)
++ vfsub_update_h_iattr(a->path, /*did*/NULL); /*ignore*/
++ }
++ AuTraceErr(*a->errp);
++}
++
++int vfsub_notify_change(struct path *path, struct iattr *ia)
++{
++ int err;
++ struct notify_change_args args = {
++ .errp = &err,
++ .path = path,
++ .ia = ia
++ };
++
++ call_notify_change(&args);
++
++ return err;
++}
++
++int vfsub_sio_notify_change(struct path *path, struct iattr *ia)
++{
++ int err, wkq_err;
++ struct notify_change_args args = {
++ .errp = &err,
++ .path = path,
++ .ia = ia
++ };
++
++ wkq_err = au_wkq_wait(call_notify_change, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct unlink_args {
++ int *errp;
++ struct inode *dir;
++ struct path *path;
++};
++
++static void call_unlink(void *args)
++{
++ struct unlink_args *a = args;
++ struct dentry *d = a->path->dentry;
++ struct inode *h_inode;
++ const int stop_sillyrename = (au_test_nfs(d->d_sb)
++ && atomic_read(&d->d_count) == 1);
++
++ IMustLock(a->dir);
++
++ a->path->dentry = d->d_parent;
++ *a->errp = security_path_unlink(a->path, d);
++ a->path->dentry = d;
++ if (unlikely(*a->errp))
++ return;
++
++ if (!stop_sillyrename)
++ dget(d);
++ h_inode = d->d_inode;
++ if (h_inode)
++ atomic_inc(&h_inode->i_count);
++
++ lockdep_off();
++ *a->errp = vfs_unlink(a->dir, d);
++ lockdep_on();
++ if (!*a->errp) {
++ struct path tmp = {
++ .dentry = d->d_parent,
++ .mnt = a->path->mnt
++ };
++ vfsub_update_h_iattr(&tmp, /*did*/NULL); /*ignore*/
++ }
++
++ if (!stop_sillyrename)
++ dput(d);
++ if (h_inode)
++ iput(h_inode);
++
++ AuTraceErr(*a->errp);
++}
++
++/*
++ * @dir: must be locked.
++ * @dentry: target dentry.
++ */
++int vfsub_unlink(struct inode *dir, struct path *path, int force)
++{
++ int err;
++ struct unlink_args args = {
++ .errp = &err,
++ .dir = dir,
++ .path = path
++ };
++
++ if (!force)
++ call_unlink(&args);
++ else {
++ int wkq_err;
++
++ wkq_err = au_wkq_wait(call_unlink, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/vfsub.h linux-2.6.31.5/fs/aufs/vfsub.h
+--- linux-2.6.31.5.orig/fs/aufs/vfsub.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/vfsub.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,172 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * sub-routines for VFS
++ */
++
++#ifndef __AUFS_VFSUB_H__
++#define __AUFS_VFSUB_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/fs_stack.h>
++
++/* ---------------------------------------------------------------------- */
++
++/* lock subclass for lower inode */
++/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */
++/* reduce? gave up. */
++enum {
++ AuLsc_I_Begin = I_MUTEX_QUOTA, /* 4 */
++ AuLsc_I_PARENT, /* lower inode, parent first */
++ AuLsc_I_PARENT2, /* copyup dirs */
++ AuLsc_I_PARENT3, /* copyup wh */
++ AuLsc_I_CHILD,
++ AuLsc_I_CHILD2,
++ AuLsc_I_End
++};
++
++/* to debug easier, do not make them inlined functions */
++#define MtxMustLock(mtx) AuDebugOn(!mutex_is_locked(mtx))
++#define IMustLock(i) MtxMustLock(&(i)->i_mutex)
++
++/* ---------------------------------------------------------------------- */
++
++static inline void vfsub_copy_inode_size(struct inode *inode,
++ struct inode *h_inode)
++{
++ spin_lock(&inode->i_lock);
++ fsstack_copy_inode_size(inode, h_inode);
++ spin_unlock(&inode->i_lock);
++}
++
++int vfsub_update_h_iattr(struct path *h_path, int *did);
++struct file *vfsub_filp_open(const char *path, int oflags, int mode);
++int vfsub_kern_path(const char *name, unsigned int flags, struct path *path);
++struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
++ int len);
++struct dentry *vfsub_lookup_hash(struct nameidata *nd);
++
++/* ---------------------------------------------------------------------- */
++
++struct au_hinode;
++struct dentry *vfsub_lock_rename(struct dentry *d1, struct au_hinode *hdir1,
++ struct dentry *d2, struct au_hinode *hdir2);
++void vfsub_unlock_rename(struct dentry *d1, struct au_hinode *hdir1,
++ struct dentry *d2, struct au_hinode *hdir2);
++
++int vfsub_create(struct inode *dir, struct path *path, int mode);
++int vfsub_symlink(struct inode *dir, struct path *path,
++ const char *symname);
++int vfsub_mknod(struct inode *dir, struct path *path, int mode, dev_t dev);
++int vfsub_link(struct dentry *src_dentry, struct inode *dir,
++ struct path *path);
++int vfsub_rename(struct inode *src_hdir, struct dentry *src_dentry,
++ struct inode *hdir, struct path *path);
++int vfsub_mkdir(struct inode *dir, struct path *path, int mode);
++int vfsub_rmdir(struct inode *dir, struct path *path);
++
++/* ---------------------------------------------------------------------- */
++
++ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
++ loff_t *ppos);
++ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count,
++ loff_t *ppos);
++ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
++ loff_t *ppos);
++ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count,
++ loff_t *ppos);
++int vfsub_readdir(struct file *file, filldir_t filldir, void *arg);
++
++static inline void vfsub_file_accessed(struct file *h_file)
++{
++ file_accessed(h_file);
++ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL); /*ignore*/
++}
++
++static inline void vfsub_touch_atime(struct vfsmount *h_mnt,
++ struct dentry *h_dentry)
++{
++ struct path h_path = {
++ .dentry = h_dentry,
++ .mnt = h_mnt
++ };
++ touch_atime(h_mnt, h_dentry);
++ vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/
++}
++
++long vfsub_splice_to(struct file *in, loff_t *ppos,
++ struct pipe_inode_info *pipe, size_t len,
++ unsigned int flags);
++long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out,
++ loff_t *ppos, size_t len, unsigned int flags);
++int vfsub_trunc(struct path *h_path, loff_t length, unsigned int attr,
++ struct file *h_file);
++
++/* ---------------------------------------------------------------------- */
++
++static inline loff_t vfsub_llseek(struct file *file, loff_t offset, int origin)
++{
++ loff_t err;
++
++ lockdep_off();
++ err = vfs_llseek(file, offset, origin);
++ lockdep_on();
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* dirty workaround for strict type of fmode_t */
++union vfsub_fmu {
++ fmode_t fm;
++ unsigned int ui;
++};
++
++static inline unsigned int vfsub_fmode_to_uint(fmode_t fm)
++{
++ union vfsub_fmu u = {
++ .fm = fm
++ };
++
++ BUILD_BUG_ON(sizeof(u.fm) != sizeof(u.ui));
++
++ return u.ui;
++}
++
++static inline fmode_t vfsub_uint_to_fmode(unsigned int ui)
++{
++ union vfsub_fmu u = {
++ .ui = ui
++ };
++
++ return u.fm;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode);
++int vfsub_sio_rmdir(struct inode *dir, struct path *path);
++int vfsub_sio_notify_change(struct path *path, struct iattr *ia);
++int vfsub_notify_change(struct path *path, struct iattr *ia);
++int vfsub_unlink(struct inode *dir, struct path *path, int force);
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_VFSUB_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/wbr_policy.c linux-2.6.31.5/fs/aufs/wbr_policy.c
+--- linux-2.6.31.5.orig/fs/aufs/wbr_policy.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/wbr_policy.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,641 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * policies for selecting one among multiple writable branches
++ */
++
++#include <linux/statfs.h>
++#include "aufs.h"
++
++/* subset of cpup_attr() */
++static noinline_for_stack
++int au_cpdown_attr(struct path *h_path, struct dentry *h_src)
++{
++ int err, sbits;
++ struct iattr ia;
++ struct inode *h_isrc;
++
++ h_isrc = h_src->d_inode;
++ ia.ia_valid = ATTR_FORCE | ATTR_MODE | ATTR_UID | ATTR_GID;
++ ia.ia_mode = h_isrc->i_mode;
++ ia.ia_uid = h_isrc->i_uid;
++ ia.ia_gid = h_isrc->i_gid;
++ sbits = !!(ia.ia_mode & (S_ISUID | S_ISGID));
++ au_cpup_attr_flags(h_path->dentry->d_inode, h_isrc);
++ err = vfsub_sio_notify_change(h_path, &ia);
++
++ /* is this nfs only? */
++ if (!err && sbits && au_test_nfs(h_path->dentry->d_sb)) {
++ ia.ia_valid = ATTR_FORCE | ATTR_MODE;
++ ia.ia_mode = h_isrc->i_mode;
++ err = vfsub_sio_notify_change(h_path, &ia);
++ }
++
++ return err;
++}
++
++#define AuCpdown_PARENT_OPQ 1
++#define AuCpdown_WHED (1 << 1)
++#define AuCpdown_MADE_DIR (1 << 2)
++#define AuCpdown_DIROPQ (1 << 3)
++#define au_ftest_cpdown(flags, name) ((flags) & AuCpdown_##name)
++#define au_fset_cpdown(flags, name) { (flags) |= AuCpdown_##name; }
++#define au_fclr_cpdown(flags, name) { (flags) &= ~AuCpdown_##name; }
++
++struct au_cpdown_dir_args {
++ struct dentry *parent;
++ unsigned int flags;
++};
++
++static int au_cpdown_dir_opq(struct dentry *dentry, aufs_bindex_t bdst,
++ struct au_cpdown_dir_args *a)
++{
++ int err;
++ struct dentry *opq_dentry;
++
++ opq_dentry = au_diropq_create(dentry, bdst);
++ err = PTR_ERR(opq_dentry);
++ if (IS_ERR(opq_dentry))
++ goto out;
++ dput(opq_dentry);
++ au_fset_cpdown(a->flags, DIROPQ);
++
++ out:
++ return err;
++}
++
++static int au_cpdown_dir_wh(struct dentry *dentry, struct dentry *h_parent,
++ struct inode *dir, aufs_bindex_t bdst)
++{
++ int err;
++ struct path h_path;
++ struct au_branch *br;
++
++ br = au_sbr(dentry->d_sb, bdst);
++ h_path.dentry = au_wh_lkup(h_parent, &dentry->d_name, br);
++ err = PTR_ERR(h_path.dentry);
++ if (IS_ERR(h_path.dentry))
++ goto out;
++
++ err = 0;
++ if (h_path.dentry->d_inode) {
++ h_path.mnt = br->br_mnt;
++ err = au_wh_unlink_dentry(au_h_iptr(dir, bdst), &h_path,
++ dentry);
++ }
++ dput(h_path.dentry);
++
++ out:
++ return err;
++}
++
++static int au_cpdown_dir(struct dentry *dentry, aufs_bindex_t bdst,
++ struct dentry *h_parent, void *arg)
++{
++ int err, rerr;
++ aufs_bindex_t bend, bopq, bstart;
++ unsigned char parent_opq;
++ struct path h_path;
++ struct dentry *parent;
++ struct inode *h_dir, *h_inode, *inode, *dir;
++ struct au_cpdown_dir_args *args = arg;
++
++ bstart = au_dbstart(dentry);
++ /* dentry is di-locked */
++ parent = dget_parent(dentry);
++ dir = parent->d_inode;
++ h_dir = h_parent->d_inode;
++ AuDebugOn(h_dir != au_h_iptr(dir, bdst));
++ IMustLock(h_dir);
++
++ err = au_lkup_neg(dentry, bdst);
++ if (unlikely(err < 0))
++ goto out;
++ h_path.dentry = au_h_dptr(dentry, bdst);
++ h_path.mnt = au_sbr_mnt(dentry->d_sb, bdst);
++ err = vfsub_sio_mkdir(au_h_iptr(dir, bdst), &h_path,
++ S_IRWXU | S_IRUGO | S_IXUGO);
++ if (unlikely(err))
++ goto out_put;
++ au_fset_cpdown(args->flags, MADE_DIR);
++
++ bend = au_dbend(dentry);
++ bopq = au_dbdiropq(dentry);
++ au_fclr_cpdown(args->flags, WHED);
++ au_fclr_cpdown(args->flags, DIROPQ);
++ if (au_dbwh(dentry) == bdst)
++ au_fset_cpdown(args->flags, WHED);
++ if (!au_ftest_cpdown(args->flags, PARENT_OPQ) && bopq <= bdst)
++ au_fset_cpdown(args->flags, PARENT_OPQ);
++ parent_opq = (au_ftest_cpdown(args->flags, PARENT_OPQ)
++ && args->parent == dentry);
++ h_inode = h_path.dentry->d_inode;
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ if (au_ftest_cpdown(args->flags, WHED)) {
++ err = au_cpdown_dir_opq(dentry, bdst, args);
++ if (unlikely(err)) {
++ mutex_unlock(&h_inode->i_mutex);
++ goto out_dir;
++ }
++ }
++
++ err = au_cpdown_attr(&h_path, au_h_dptr(dentry, bstart));
++ mutex_unlock(&h_inode->i_mutex);
++ if (unlikely(err))
++ goto out_opq;
++
++ if (au_ftest_cpdown(args->flags, WHED)) {
++ err = au_cpdown_dir_wh(dentry, h_parent, dir, bdst);
++ if (unlikely(err))
++ goto out_opq;
++ }
++
++ inode = dentry->d_inode;
++ if (au_ibend(inode) < bdst)
++ au_set_ibend(inode, bdst);
++ au_set_h_iptr(inode, bdst, au_igrab(h_inode),
++ au_hi_flags(inode, /*isdir*/1));
++ goto out; /* success */
++
++ /* revert */
++ out_opq:
++ if (au_ftest_cpdown(args->flags, DIROPQ)) {
++ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
++ rerr = au_diropq_remove(dentry, bdst);
++ mutex_unlock(&h_inode->i_mutex);
++ if (unlikely(rerr)) {
++ AuIOErr("failed removing diropq for %.*s b%d (%d)\n",
++ AuDLNPair(dentry), bdst, rerr);
++ err = -EIO;
++ goto out;
++ }
++ }
++ out_dir:
++ if (au_ftest_cpdown(args->flags, MADE_DIR)) {
++ rerr = vfsub_sio_rmdir(au_h_iptr(dir, bdst), &h_path);
++ if (unlikely(rerr)) {
++ AuIOErr("failed removing %.*s b%d (%d)\n",
++ AuDLNPair(dentry), bdst, rerr);
++ err = -EIO;
++ }
++ }
++ out_put:
++ au_set_h_dptr(dentry, bdst, NULL);
++ if (au_dbend(dentry) == bdst)
++ au_update_dbend(dentry);
++ out:
++ dput(parent);
++ return err;
++}
++
++int au_cpdown_dirs(struct dentry *dentry, aufs_bindex_t bdst)
++{
++ int err;
++ struct au_cpdown_dir_args args = {
++ .parent = dget_parent(dentry),
++ .flags = 0
++ };
++
++ err = au_cp_dirs(dentry, bdst, au_cpdown_dir, &args);
++ dput(args.parent);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* policies for create */
++
++static int au_wbr_bu(struct super_block *sb, aufs_bindex_t bindex)
++{
++ for (; bindex >= 0; bindex--)
++ if (!au_br_rdonly(au_sbr(sb, bindex)))
++ return bindex;
++ return -EROFS;
++}
++
++/* top down parent */
++static int au_wbr_create_tdp(struct dentry *dentry, int isdir __maybe_unused)
++{
++ int err;
++ aufs_bindex_t bstart, bindex;
++ struct super_block *sb;
++ struct dentry *parent, *h_parent;
++
++ sb = dentry->d_sb;
++ bstart = au_dbstart(dentry);
++ err = bstart;
++ if (!au_br_rdonly(au_sbr(sb, bstart)))
++ goto out;
++
++ err = -EROFS;
++ parent = dget_parent(dentry);
++ for (bindex = au_dbstart(parent); bindex < bstart; bindex++) {
++ h_parent = au_h_dptr(parent, bindex);
++ if (!h_parent || !h_parent->d_inode)
++ continue;
++
++ if (!au_br_rdonly(au_sbr(sb, bindex))) {
++ err = bindex;
++ break;
++ }
++ }
++ dput(parent);
++
++ /* bottom up here */
++ if (unlikely(err < 0))
++ err = au_wbr_bu(sb, bstart - 1);
++
++ out:
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* an exception for the policy other than tdp */
++static int au_wbr_create_exp(struct dentry *dentry)
++{
++ int err;
++ aufs_bindex_t bwh, bdiropq;
++ struct dentry *parent;
++
++ err = -1;
++ bwh = au_dbwh(dentry);
++ parent = dget_parent(dentry);
++ bdiropq = au_dbdiropq(parent);
++ if (bwh >= 0) {
++ if (bdiropq >= 0)
++ err = min(bdiropq, bwh);
++ else
++ err = bwh;
++ AuDbg("%d\n", err);
++ } else if (bdiropq >= 0) {
++ err = bdiropq;
++ AuDbg("%d\n", err);
++ }
++ dput(parent);
++
++ if (err >= 0 && au_br_rdonly(au_sbr(dentry->d_sb, err)))
++ err = -1;
++
++ AuDbg("%d\n", err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* round robin */
++static int au_wbr_create_init_rr(struct super_block *sb)
++{
++ int err;
++
++ err = au_wbr_bu(sb, au_sbend(sb));
++ atomic_set(&au_sbi(sb)->si_wbr_rr_next, -err); /* less important */
++ /* smp_mb(); */
++
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++static int au_wbr_create_rr(struct dentry *dentry, int isdir)
++{
++ int err, nbr;
++ unsigned int u;
++ aufs_bindex_t bindex, bend;
++ struct super_block *sb;
++ atomic_t *next;
++
++ err = au_wbr_create_exp(dentry);
++ if (err >= 0)
++ goto out;
++
++ sb = dentry->d_sb;
++ next = &au_sbi(sb)->si_wbr_rr_next;
++ bend = au_sbend(sb);
++ nbr = bend + 1;
++ for (bindex = 0; bindex <= bend; bindex++) {
++ if (!isdir) {
++ err = atomic_dec_return(next) + 1;
++ /* modulo for 0 is meaningless */
++ if (unlikely(!err))
++ err = atomic_dec_return(next) + 1;
++ } else
++ err = atomic_read(next);
++ AuDbg("%d\n", err);
++ u = err;
++ err = u % nbr;
++ AuDbg("%d\n", err);
++ if (!au_br_rdonly(au_sbr(sb, err)))
++ break;
++ err = -EROFS;
++ }
++
++ out:
++ AuDbg("%d\n", err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* most free space */
++static void au_mfs(struct dentry *dentry)
++{
++ struct super_block *sb;
++ struct au_branch *br;
++ struct au_wbr_mfs *mfs;
++ aufs_bindex_t bindex, bend;
++ int err;
++ unsigned long long b, bavail;
++ /* reduce the stack usage */
++ struct kstatfs *st;
++
++ st = kmalloc(sizeof(*st), GFP_NOFS);
++ if (unlikely(!st)) {
++ AuWarn1("failed updating mfs(%d), ignored\n", -ENOMEM);
++ return;
++ }
++
++ bavail = 0;
++ sb = dentry->d_sb;
++ mfs = &au_sbi(sb)->si_wbr_mfs;
++ MtxMustLock(&mfs->mfs_lock);
++ mfs->mfs_bindex = -EROFS;
++ mfs->mfsrr_bytes = 0;
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ if (au_br_rdonly(br))
++ continue;
++
++ /* sb->s_root for NFS is unreliable */
++ err = vfs_statfs(br->br_mnt->mnt_root, st);
++ if (unlikely(err)) {
++ AuWarn1("failed statfs, b%d, %d\n", bindex, err);
++ continue;
++ }
++
++ /* when the available size is equal, select the lower one */
++ BUILD_BUG_ON(sizeof(b) < sizeof(st->f_bavail)
++ || sizeof(b) < sizeof(st->f_bsize));
++ b = st->f_bavail * st->f_bsize;
++ br->br_wbr->wbr_bytes = b;
++ if (b >= bavail) {
++ bavail = b;
++ mfs->mfs_bindex = bindex;
++ mfs->mfs_jiffy = jiffies;
++ }
++ }
++
++ mfs->mfsrr_bytes = bavail;
++ AuDbg("b%d\n", mfs->mfs_bindex);
++ kfree(st);
++}
++
++static int au_wbr_create_mfs(struct dentry *dentry, int isdir __maybe_unused)
++{
++ int err;
++ struct super_block *sb;
++ struct au_wbr_mfs *mfs;
++
++ err = au_wbr_create_exp(dentry);
++ if (err >= 0)
++ goto out;
++
++ sb = dentry->d_sb;
++ mfs = &au_sbi(sb)->si_wbr_mfs;
++ mutex_lock(&mfs->mfs_lock);
++ if (time_after(jiffies, mfs->mfs_jiffy + mfs->mfs_expire)
++ || mfs->mfs_bindex < 0
++ || au_br_rdonly(au_sbr(sb, mfs->mfs_bindex)))
++ au_mfs(dentry);
++ mutex_unlock(&mfs->mfs_lock);
++ err = mfs->mfs_bindex;
++
++ out:
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++static int au_wbr_create_init_mfs(struct super_block *sb)
++{
++ struct au_wbr_mfs *mfs;
++
++ mfs = &au_sbi(sb)->si_wbr_mfs;
++ mutex_init(&mfs->mfs_lock);
++ mfs->mfs_jiffy = 0;
++ mfs->mfs_bindex = -EROFS;
++
++ return 0;
++}
++
++static int au_wbr_create_fin_mfs(struct super_block *sb __maybe_unused)
++{
++ mutex_destroy(&au_sbi(sb)->si_wbr_mfs.mfs_lock);
++ return 0;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* most free space and then round robin */
++static int au_wbr_create_mfsrr(struct dentry *dentry, int isdir)
++{
++ int err;
++ struct au_wbr_mfs *mfs;
++
++ err = au_wbr_create_mfs(dentry, isdir);
++ if (err >= 0) {
++ mfs = &au_sbi(dentry->d_sb)->si_wbr_mfs;
++ mutex_lock(&mfs->mfs_lock);
++ if (mfs->mfsrr_bytes < mfs->mfsrr_watermark)
++ err = au_wbr_create_rr(dentry, isdir);
++ mutex_unlock(&mfs->mfs_lock);
++ }
++
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++static int au_wbr_create_init_mfsrr(struct super_block *sb)
++{
++ int err;
++
++ au_wbr_create_init_mfs(sb); /* ignore */
++ err = au_wbr_create_init_rr(sb);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* top down parent and most free space */
++static int au_wbr_create_pmfs(struct dentry *dentry, int isdir)
++{
++ int err, e2;
++ unsigned long long b;
++ aufs_bindex_t bindex, bstart, bend;
++ struct super_block *sb;
++ struct dentry *parent, *h_parent;
++ struct au_branch *br;
++
++ err = au_wbr_create_tdp(dentry, isdir);
++ if (unlikely(err < 0))
++ goto out;
++ parent = dget_parent(dentry);
++ bstart = au_dbstart(parent);
++ bend = au_dbtaildir(parent);
++ if (bstart == bend)
++ goto out_parent; /* success */
++
++ e2 = au_wbr_create_mfs(dentry, isdir);
++ if (e2 < 0)
++ goto out_parent; /* success */
++
++ /* when the available size is equal, select upper one */
++ sb = dentry->d_sb;
++ br = au_sbr(sb, err);
++ b = br->br_wbr->wbr_bytes;
++ AuDbg("b%d, %llu\n", err, b);
++
++ for (bindex = bstart; bindex <= bend; bindex++) {
++ h_parent = au_h_dptr(parent, bindex);
++ if (!h_parent || !h_parent->d_inode)
++ continue;
++
++ br = au_sbr(sb, bindex);
++ if (!au_br_rdonly(br) && br->br_wbr->wbr_bytes > b) {
++ b = br->br_wbr->wbr_bytes;
++ err = bindex;
++ AuDbg("b%d, %llu\n", err, b);
++ }
++ }
++
++ out_parent:
++ dput(parent);
++ out:
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* policies for copyup */
++
++/* top down parent */
++static int au_wbr_copyup_tdp(struct dentry *dentry)
++{
++ return au_wbr_create_tdp(dentry, /*isdir, anything is ok*/0);
++}
++
++/* bottom up parent */
++static int au_wbr_copyup_bup(struct dentry *dentry)
++{
++ int err;
++ aufs_bindex_t bindex, bstart;
++ struct dentry *parent, *h_parent;
++ struct super_block *sb;
++
++ err = -EROFS;
++ sb = dentry->d_sb;
++ parent = dget_parent(dentry);
++ bstart = au_dbstart(parent);
++ for (bindex = au_dbstart(dentry); bindex >= bstart; bindex--) {
++ h_parent = au_h_dptr(parent, bindex);
++ if (!h_parent || !h_parent->d_inode)
++ continue;
++
++ if (!au_br_rdonly(au_sbr(sb, bindex))) {
++ err = bindex;
++ break;
++ }
++ }
++ dput(parent);
++
++ /* bottom up here */
++ if (unlikely(err < 0))
++ err = au_wbr_bu(sb, bstart - 1);
++
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++/* bottom up */
++static int au_wbr_copyup_bu(struct dentry *dentry)
++{
++ int err;
++
++ err = au_wbr_bu(dentry->d_sb, au_dbstart(dentry));
++
++ AuDbg("b%d\n", err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct au_wbr_copyup_operations au_wbr_copyup_ops[] = {
++ [AuWbrCopyup_TDP] = {
++ .copyup = au_wbr_copyup_tdp
++ },
++ [AuWbrCopyup_BUP] = {
++ .copyup = au_wbr_copyup_bup
++ },
++ [AuWbrCopyup_BU] = {
++ .copyup = au_wbr_copyup_bu
++ }
++};
++
++struct au_wbr_create_operations au_wbr_create_ops[] = {
++ [AuWbrCreate_TDP] = {
++ .create = au_wbr_create_tdp
++ },
++ [AuWbrCreate_RR] = {
++ .create = au_wbr_create_rr,
++ .init = au_wbr_create_init_rr
++ },
++ [AuWbrCreate_MFS] = {
++ .create = au_wbr_create_mfs,
++ .init = au_wbr_create_init_mfs,
++ .fin = au_wbr_create_fin_mfs
++ },
++ [AuWbrCreate_MFSV] = {
++ .create = au_wbr_create_mfs,
++ .init = au_wbr_create_init_mfs,
++ .fin = au_wbr_create_fin_mfs
++ },
++ [AuWbrCreate_MFSRR] = {
++ .create = au_wbr_create_mfsrr,
++ .init = au_wbr_create_init_mfsrr,
++ .fin = au_wbr_create_fin_mfs
++ },
++ [AuWbrCreate_MFSRRV] = {
++ .create = au_wbr_create_mfsrr,
++ .init = au_wbr_create_init_mfsrr,
++ .fin = au_wbr_create_fin_mfs
++ },
++ [AuWbrCreate_PMFS] = {
++ .create = au_wbr_create_pmfs,
++ .init = au_wbr_create_init_mfs,
++ .fin = au_wbr_create_fin_mfs
++ },
++ [AuWbrCreate_PMFSV] = {
++ .create = au_wbr_create_pmfs,
++ .init = au_wbr_create_init_mfs,
++ .fin = au_wbr_create_fin_mfs
++ }
++};
+diff -Nur linux-2.6.31.5.orig/fs/aufs/whout.c linux-2.6.31.5/fs/aufs/whout.c
+--- linux-2.6.31.5.orig/fs/aufs/whout.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/whout.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,1048 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * whiteout for logical deletion and opaque directory
++ */
++
++#include <linux/fs.h>
++#include "aufs.h"
++
++#define WH_MASK S_IRUGO
++
++/*
++ * If a directory contains this file, then it is opaque. We start with the
++ * .wh. flag so that it is blocked by lookup.
++ */
++static struct qstr diropq_name = {
++ .name = AUFS_WH_DIROPQ,
++ .len = sizeof(AUFS_WH_DIROPQ) - 1
++};
++
++/*
++ * generate whiteout name, which is NOT terminated by NULL.
++ * @name: original d_name.name
++ * @len: original d_name.len
++ * @wh: whiteout qstr
++ * returns zero when succeeds, otherwise error.
++ * succeeded value as wh->name should be freed by kfree().
++ */
++int au_wh_name_alloc(struct qstr *wh, const struct qstr *name)
++{
++ char *p;
++
++ if (unlikely(name->len > PATH_MAX - AUFS_WH_PFX_LEN))
++ return -ENAMETOOLONG;
++
++ wh->len = name->len + AUFS_WH_PFX_LEN;
++ p = kmalloc(wh->len, GFP_NOFS);
++ wh->name = p;
++ if (p) {
++ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
++ memcpy(p + AUFS_WH_PFX_LEN, name->name, name->len);
++ /* smp_mb(); */
++ return 0;
++ }
++ return -ENOMEM;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * test if the @wh_name exists under @h_parent.
++ * @try_sio specifies the necessary of super-io.
++ */
++int au_wh_test(struct dentry *h_parent, struct qstr *wh_name,
++ struct au_branch *br, int try_sio)
++{
++ int err;
++ struct dentry *wh_dentry;
++ struct inode *h_dir;
++
++ h_dir = h_parent->d_inode;
++ if (!try_sio)
++ wh_dentry = au_lkup_one(wh_name, h_parent, br, /*nd*/NULL);
++ else
++ wh_dentry = au_sio_lkup_one(wh_name, h_parent, br);
++ err = PTR_ERR(wh_dentry);
++ if (IS_ERR(wh_dentry))
++ goto out;
++
++ err = 0;
++ if (!wh_dentry->d_inode)
++ goto out_wh; /* success */
++
++ err = 1;
++ if (S_ISREG(wh_dentry->d_inode->i_mode))
++ goto out_wh; /* success */
++
++ err = -EIO;
++ AuIOErr("%.*s Invalid whiteout entry type 0%o.\n",
++ AuDLNPair(wh_dentry), wh_dentry->d_inode->i_mode);
++
++ out_wh:
++ dput(wh_dentry);
++ out:
++ return err;
++}
++
++/*
++ * test if the @h_dentry sets opaque or not.
++ */
++int au_diropq_test(struct dentry *h_dentry, struct au_branch *br)
++{
++ int err;
++ struct inode *h_dir;
++
++ h_dir = h_dentry->d_inode;
++ err = au_wh_test(h_dentry, &diropq_name, br,
++ au_test_h_perm_sio(h_dir, MAY_EXEC));
++ return err;
++}
++
++/*
++ * returns a negative dentry whose name is unique and temporary.
++ */
++struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br,
++ struct qstr *prefix)
++{
++#define HEX_LEN 4
++ struct dentry *dentry;
++ int i;
++ char defname[AUFS_WH_PFX_LEN * 2 + DNAME_INLINE_LEN_MIN + 1
++ + HEX_LEN + 1], *name, *p;
++ static unsigned short cnt;
++ struct qstr qs;
++
++ name = defname;
++ qs.len = sizeof(defname) - DNAME_INLINE_LEN_MIN + prefix->len - 1;
++ if (unlikely(prefix->len > DNAME_INLINE_LEN_MIN)) {
++ dentry = ERR_PTR(-ENAMETOOLONG);
++ if (unlikely(qs.len >= PATH_MAX))
++ goto out;
++ dentry = ERR_PTR(-ENOMEM);
++ name = kmalloc(qs.len + 1, GFP_NOFS);
++ if (unlikely(!name))
++ goto out;
++ }
++
++ /* doubly whiteout-ed */
++ memcpy(name, AUFS_WH_PFX AUFS_WH_PFX, AUFS_WH_PFX_LEN * 2);
++ p = name + AUFS_WH_PFX_LEN * 2;
++ memcpy(p, prefix->name, prefix->len);
++ p += prefix->len;
++ *p++ = '.';
++ AuDebugOn(name + qs.len + 1 - p <= HEX_LEN);
++
++ qs.name = name;
++ for (i = 0; i < 3; i++) {
++ sprintf(p, "%.*d", HEX_LEN, cnt++);
++ dentry = au_sio_lkup_one(&qs, h_parent, br);
++ if (IS_ERR(dentry) || !dentry->d_inode)
++ goto out_name;
++ dput(dentry);
++ }
++ /* AuWarn("could not get random name\n"); */
++ dentry = ERR_PTR(-EEXIST);
++ AuDbg("%.*s\n", AuLNPair(&qs));
++ BUG();
++
++ out_name:
++ if (name != defname)
++ kfree(name);
++ out:
++ return dentry;
++#undef HEX_LEN
++}
++
++/*
++ * rename the @h_dentry on @br to the whiteouted temporary name.
++ */
++int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br)
++{
++ int err;
++ struct path h_path = {
++ .mnt = br->br_mnt
++ };
++ struct inode *h_dir;
++ struct dentry *h_parent;
++
++ h_parent = h_dentry->d_parent; /* dir inode is locked */
++ h_dir = h_parent->d_inode;
++ IMustLock(h_dir);
++
++ h_path.dentry = au_whtmp_lkup(h_parent, br, &h_dentry->d_name);
++ err = PTR_ERR(h_path.dentry);
++ if (IS_ERR(h_path.dentry))
++ goto out;
++
++ /* under the same dir, no need to lock_rename() */
++ err = vfsub_rename(h_dir, h_dentry, h_dir, &h_path);
++ AuTraceErr(err);
++ dput(h_path.dentry);
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * functions for removing a whiteout
++ */
++
++static int do_unlink_wh(struct inode *h_dir, struct path *h_path)
++{
++ int force;
++
++ /*
++ * forces superio when the dir has a sticky bit.
++ * this may be a violation of unix fs semantics.
++ */
++ force = (h_dir->i_mode & S_ISVTX)
++ && h_path->dentry->d_inode->i_uid != current_fsuid();
++ return vfsub_unlink(h_dir, h_path, force);
++}
++
++int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path,
++ struct dentry *dentry)
++{
++ int err;
++
++ err = do_unlink_wh(h_dir, h_path);
++ if (!err && dentry)
++ au_set_dbwh(dentry, -1);
++
++ return err;
++}
++
++static int unlink_wh_name(struct dentry *h_parent, struct qstr *wh,
++ struct au_branch *br)
++{
++ int err;
++ struct path h_path = {
++ .mnt = br->br_mnt
++ };
++
++ err = 0;
++ h_path.dentry = au_lkup_one(wh, h_parent, br, /*nd*/NULL);
++ if (IS_ERR(h_path.dentry))
++ err = PTR_ERR(h_path.dentry);
++ else {
++ if (h_path.dentry->d_inode
++ && S_ISREG(h_path.dentry->d_inode->i_mode))
++ err = do_unlink_wh(h_parent->d_inode, &h_path);
++ dput(h_path.dentry);
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * initialize/clean whiteout for a branch
++ */
++
++static void au_wh_clean(struct inode *h_dir, struct path *whpath,
++ const int isdir)
++{
++ int err;
++
++ if (!whpath->dentry->d_inode)
++ return;
++
++ err = mnt_want_write(whpath->mnt);
++ if (!err) {
++ if (isdir)
++ err = vfsub_rmdir(h_dir, whpath);
++ else
++ err = vfsub_unlink(h_dir, whpath, /*force*/0);
++ mnt_drop_write(whpath->mnt);
++ }
++ if (unlikely(err))
++ AuWarn("failed removing %.*s (%d), ignored.\n",
++ AuDLNPair(whpath->dentry), err);
++}
++
++static int test_linkable(struct dentry *h_root)
++{
++ struct inode *h_dir = h_root->d_inode;
++
++ if (h_dir->i_op->link)
++ return 0;
++
++ AuErr("%.*s (%s) doesn't support link(2), use noplink and rw+nolwh\n",
++ AuDLNPair(h_root), au_sbtype(h_root->d_sb));
++ return -ENOSYS;
++}
++
++/* todo: should this mkdir be done in /sbin/mount.aufs helper? */
++static int au_whdir(struct inode *h_dir, struct path *path)
++{
++ int err;
++
++ err = -EEXIST;
++ if (!path->dentry->d_inode) {
++ int mode = S_IRWXU;
++
++ if (au_test_nfs(path->dentry->d_sb))
++ mode |= S_IXUGO;
++ err = mnt_want_write(path->mnt);
++ if (!err) {
++ err = vfsub_mkdir(h_dir, path, mode);
++ mnt_drop_write(path->mnt);
++ }
++ } else if (S_ISDIR(path->dentry->d_inode->i_mode))
++ err = 0;
++ else
++ AuErr("unknown %.*s exists\n", AuDLNPair(path->dentry));
++
++ return err;
++}
++
++struct au_wh_base {
++ const struct qstr *name;
++ struct dentry *dentry;
++};
++
++static void au_wh_init_ro(struct inode *h_dir, struct au_wh_base base[],
++ struct path *h_path)
++{
++ h_path->dentry = base[AuBrWh_BASE].dentry;
++ au_wh_clean(h_dir, h_path, /*isdir*/0);
++ h_path->dentry = base[AuBrWh_PLINK].dentry;
++ au_wh_clean(h_dir, h_path, /*isdir*/1);
++ h_path->dentry = base[AuBrWh_ORPH].dentry;
++ au_wh_clean(h_dir, h_path, /*isdir*/1);
++}
++
++/*
++ * returns tri-state,
++ * minus: error, caller should print the mesage
++ * zero: succuess
++ * plus: error, caller should NOT print the mesage
++ */
++static int au_wh_init_rw_nolink(struct dentry *h_root, struct au_wbr *wbr,
++ int do_plink, struct au_wh_base base[],
++ struct path *h_path)
++{
++ int err;
++ struct inode *h_dir;
++
++ h_dir = h_root->d_inode;
++ h_path->dentry = base[AuBrWh_BASE].dentry;
++ au_wh_clean(h_dir, h_path, /*isdir*/0);
++ h_path->dentry = base[AuBrWh_PLINK].dentry;
++ if (do_plink) {
++ err = test_linkable(h_root);
++ if (unlikely(err)) {
++ err = 1;
++ goto out;
++ }
++
++ err = au_whdir(h_dir, h_path);
++ if (unlikely(err))
++ goto out;
++ wbr->wbr_plink = dget(base[AuBrWh_PLINK].dentry);
++ } else
++ au_wh_clean(h_dir, h_path, /*isdir*/1);
++ h_path->dentry = base[AuBrWh_ORPH].dentry;
++ err = au_whdir(h_dir, h_path);
++ if (unlikely(err))
++ goto out;
++ wbr->wbr_orph = dget(base[AuBrWh_ORPH].dentry);
++
++ out:
++ return err;
++}
++
++/*
++ * for the moment, aufs supports the branch filesystem which does not support
++ * link(2). testing on FAT which does not support i_op->setattr() fully either,
++ * copyup failed. finally, such filesystem will not be used as the writable
++ * branch.
++ *
++ * returns tri-state, see above.
++ */
++static int au_wh_init_rw(struct dentry *h_root, struct au_wbr *wbr,
++ int do_plink, struct au_wh_base base[],
++ struct path *h_path)
++{
++ int err;
++ struct inode *h_dir;
++
++ WbrWhMustWriteLock(wbr);
++
++ err = test_linkable(h_root);
++ if (unlikely(err)) {
++ err = 1;
++ goto out;
++ }
++
++ /*
++ * todo: should this create be done in /sbin/mount.aufs helper?
++ */
++ err = -EEXIST;
++ h_dir = h_root->d_inode;
++ if (!base[AuBrWh_BASE].dentry->d_inode) {
++ err = mnt_want_write(h_path->mnt);
++ if (!err) {
++ h_path->dentry = base[AuBrWh_BASE].dentry;
++ err = vfsub_create(h_dir, h_path, WH_MASK);
++ mnt_drop_write(h_path->mnt);
++ }
++ } else if (S_ISREG(base[AuBrWh_BASE].dentry->d_inode->i_mode))
++ err = 0;
++ else
++ AuErr("unknown %.*s/%.*s exists\n",
++ AuDLNPair(h_root), AuDLNPair(base[AuBrWh_BASE].dentry));
++ if (unlikely(err))
++ goto out;
++
++ h_path->dentry = base[AuBrWh_PLINK].dentry;
++ if (do_plink) {
++ err = au_whdir(h_dir, h_path);
++ if (unlikely(err))
++ goto out;
++ wbr->wbr_plink = dget(base[AuBrWh_PLINK].dentry);
++ } else
++ au_wh_clean(h_dir, h_path, /*isdir*/1);
++ wbr->wbr_whbase = dget(base[AuBrWh_BASE].dentry);
++
++ h_path->dentry = base[AuBrWh_ORPH].dentry;
++ err = au_whdir(h_dir, h_path);
++ if (unlikely(err))
++ goto out;
++ wbr->wbr_orph = dget(base[AuBrWh_ORPH].dentry);
++
++ out:
++ return err;
++}
++
++/*
++ * initialize the whiteout base file/dir for @br.
++ */
++int au_wh_init(struct dentry *h_root, struct au_branch *br,
++ struct super_block *sb)
++{
++ int err, i;
++ const unsigned char do_plink
++ = !!au_opt_test(au_mntflags(sb), PLINK);
++ struct path path = {
++ .mnt = br->br_mnt
++ };
++ struct inode *h_dir;
++ struct au_wbr *wbr = br->br_wbr;
++ static const struct qstr base_name[] = {
++ [AuBrWh_BASE] = {
++ .name = AUFS_BASE_NAME,
++ .len = sizeof(AUFS_BASE_NAME) - 1
++ },
++ [AuBrWh_PLINK] = {
++ .name = AUFS_PLINKDIR_NAME,
++ .len = sizeof(AUFS_PLINKDIR_NAME) - 1
++ },
++ [AuBrWh_ORPH] = {
++ .name = AUFS_ORPHDIR_NAME,
++ .len = sizeof(AUFS_ORPHDIR_NAME) - 1
++ }
++ };
++ struct au_wh_base base[] = {
++ [AuBrWh_BASE] = {
++ .name = base_name + AuBrWh_BASE,
++ .dentry = NULL
++ },
++ [AuBrWh_PLINK] = {
++ .name = base_name + AuBrWh_PLINK,
++ .dentry = NULL
++ },
++ [AuBrWh_ORPH] = {
++ .name = base_name + AuBrWh_ORPH,
++ .dentry = NULL
++ }
++ };
++
++ if (wbr)
++ WbrWhMustWriteLock(wbr);
++
++ h_dir = h_root->d_inode;
++ for (i = 0; i < AuBrWh_Last; i++) {
++ /* doubly whiteouted */
++ struct dentry *d;
++
++ d = au_wh_lkup(h_root, (void *)base[i].name, br);
++ err = PTR_ERR(d);
++ if (IS_ERR(d))
++ goto out;
++
++ base[i].dentry = d;
++ AuDebugOn(wbr
++ && wbr->wbr_wh[i]
++ && wbr->wbr_wh[i] != base[i].dentry);
++ }
++
++ if (wbr)
++ for (i = 0; i < AuBrWh_Last; i++) {
++ dput(wbr->wbr_wh[i]);
++ wbr->wbr_wh[i] = NULL;
++ }
++
++ err = 0;
++
++ switch (br->br_perm) {
++ case AuBrPerm_RO:
++ case AuBrPerm_ROWH:
++ case AuBrPerm_RR:
++ case AuBrPerm_RRWH:
++ au_wh_init_ro(h_dir, base, &path);
++ break;
++
++ case AuBrPerm_RWNoLinkWH:
++ err = au_wh_init_rw_nolink(h_root, wbr, do_plink, base, &path);
++ if (err > 0)
++ goto out;
++ else if (err)
++ goto out_err;
++ break;
++
++ case AuBrPerm_RW:
++ err = au_wh_init_rw(h_root, wbr, do_plink, base, &path);
++ if (err > 0)
++ goto out;
++ else if (err)
++ goto out_err;
++ break;
++
++ default:
++ BUG();
++ }
++ goto out; /* success */
++
++ out_err:
++ AuErr("an error(%d) on the writable branch %.*s(%s)\n",
++ err, AuDLNPair(h_root), au_sbtype(h_root->d_sb));
++ out:
++ for (i = 0; i < AuBrWh_Last; i++)
++ dput(base[i].dentry);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * whiteouts are all hard-linked usually.
++ * when its link count reaches a ceiling, we create a new whiteout base
++ * asynchronously.
++ */
++
++struct reinit_br_wh {
++ struct super_block *sb;
++ struct au_branch *br;
++};
++
++static void reinit_br_wh(void *arg)
++{
++ int err;
++ aufs_bindex_t bindex;
++ struct path h_path;
++ struct reinit_br_wh *a = arg;
++ struct au_wbr *wbr;
++ struct inode *dir;
++ struct dentry *h_root;
++ struct au_hinode *hdir;
++
++ err = 0;
++ wbr = a->br->br_wbr;
++ /* big aufs lock */
++ si_noflush_write_lock(a->sb);
++ if (!au_br_writable(a->br->br_perm))
++ goto out;
++ bindex = au_br_index(a->sb, a->br->br_id);
++ if (unlikely(bindex < 0))
++ goto out;
++
++ di_read_lock_parent(a->sb->s_root, AuLock_IR);
++ dir = a->sb->s_root->d_inode;
++ hdir = au_hi(dir, bindex);
++ h_root = au_h_dptr(a->sb->s_root, bindex);
++
++ au_hin_imtx_lock_nested(hdir, AuLsc_I_PARENT);
++ wbr_wh_write_lock(wbr);
++ err = au_h_verify(wbr->wbr_whbase, au_opt_udba(a->sb), hdir->hi_inode,
++ h_root, a->br);
++ if (!err) {
++ err = mnt_want_write(a->br->br_mnt);
++ if (!err) {
++ h_path.dentry = wbr->wbr_whbase;
++ h_path.mnt = a->br->br_mnt;
++ err = vfsub_unlink(hdir->hi_inode, &h_path, /*force*/0);
++ mnt_drop_write(a->br->br_mnt);
++ }
++ } else {
++ AuWarn("%.*s is moved, ignored\n", AuDLNPair(wbr->wbr_whbase));
++ err = 0;
++ }
++ dput(wbr->wbr_whbase);
++ wbr->wbr_whbase = NULL;
++ if (!err)
++ err = au_wh_init(h_root, a->br, a->sb);
++ wbr_wh_write_unlock(wbr);
++ au_hin_imtx_unlock(hdir);
++ di_read_unlock(a->sb->s_root, AuLock_IR);
++
++ out:
++ if (wbr)
++ atomic_dec(&wbr->wbr_wh_running);
++ atomic_dec(&a->br->br_count);
++ au_nwt_done(&au_sbi(a->sb)->si_nowait);
++ si_write_unlock(a->sb);
++ kfree(arg);
++ if (unlikely(err))
++ AuIOErr("err %d\n", err);
++}
++
++static void kick_reinit_br_wh(struct super_block *sb, struct au_branch *br)
++{
++ int do_dec, wkq_err;
++ struct reinit_br_wh *arg;
++
++ do_dec = 1;
++ if (atomic_inc_return(&br->br_wbr->wbr_wh_running) != 1)
++ goto out;
++
++ /* ignore ENOMEM */
++ arg = kmalloc(sizeof(*arg), GFP_NOFS);
++ if (arg) {
++ /*
++ * dec(wh_running), kfree(arg) and dec(br_count)
++ * in reinit function
++ */
++ arg->sb = sb;
++ arg->br = br;
++ atomic_inc(&br->br_count);
++ wkq_err = au_wkq_nowait(reinit_br_wh, arg, sb);
++ if (unlikely(wkq_err)) {
++ atomic_dec(&br->br_wbr->wbr_wh_running);
++ atomic_dec(&br->br_count);
++ kfree(arg);
++ }
++ do_dec = 0;
++ }
++
++ out:
++ if (do_dec)
++ atomic_dec(&br->br_wbr->wbr_wh_running);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * create the whiteout @wh.
++ */
++static int link_or_create_wh(struct super_block *sb, aufs_bindex_t bindex,
++ struct dentry *wh)
++{
++ int err;
++ struct path h_path = {
++ .dentry = wh
++ };
++ struct au_branch *br;
++ struct au_wbr *wbr;
++ struct dentry *h_parent;
++ struct inode *h_dir;
++
++ h_parent = wh->d_parent; /* dir inode is locked */
++ h_dir = h_parent->d_inode;
++ IMustLock(h_dir);
++
++ br = au_sbr(sb, bindex);
++ h_path.mnt = br->br_mnt;
++ wbr = br->br_wbr;
++ wbr_wh_read_lock(wbr);
++ if (wbr->wbr_whbase) {
++ err = vfsub_link(wbr->wbr_whbase, h_dir, &h_path);
++ if (!err || err != -EMLINK)
++ goto out;
++
++ /* link count full. re-initialize br_whbase. */
++ kick_reinit_br_wh(sb, br);
++ }
++
++ /* return this error in this context */
++ err = vfsub_create(h_dir, &h_path, WH_MASK);
++
++ out:
++ wbr_wh_read_unlock(wbr);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * create or remove the diropq.
++ */
++static struct dentry *do_diropq(struct dentry *dentry, aufs_bindex_t bindex,
++ unsigned int flags)
++{
++ struct dentry *opq_dentry, *h_dentry;
++ struct super_block *sb;
++ struct au_branch *br;
++ int err;
++
++ sb = dentry->d_sb;
++ br = au_sbr(sb, bindex);
++ h_dentry = au_h_dptr(dentry, bindex);
++ opq_dentry = au_lkup_one(&diropq_name, h_dentry, br, /*nd*/NULL);
++ if (IS_ERR(opq_dentry))
++ goto out;
++
++ if (au_ftest_diropq(flags, CREATE)) {
++ err = link_or_create_wh(sb, bindex, opq_dentry);
++ if (!err) {
++ au_set_dbdiropq(dentry, bindex);
++ goto out; /* success */
++ }
++ } else {
++ struct path tmp = {
++ .dentry = opq_dentry,
++ .mnt = br->br_mnt
++ };
++ err = do_unlink_wh(au_h_iptr(dentry->d_inode, bindex), &tmp);
++ if (!err)
++ au_set_dbdiropq(dentry, -1);
++ }
++ dput(opq_dentry);
++ opq_dentry = ERR_PTR(err);
++
++ out:
++ return opq_dentry;
++}
++
++struct do_diropq_args {
++ struct dentry **errp;
++ struct dentry *dentry;
++ aufs_bindex_t bindex;
++ unsigned int flags;
++};
++
++static void call_do_diropq(void *args)
++{
++ struct do_diropq_args *a = args;
++ *a->errp = do_diropq(a->dentry, a->bindex, a->flags);
++}
++
++struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex,
++ unsigned int flags)
++{
++ struct dentry *diropq, *h_dentry;
++
++ h_dentry = au_h_dptr(dentry, bindex);
++ if (!au_test_h_perm_sio(h_dentry->d_inode, MAY_EXEC | MAY_WRITE))
++ diropq = do_diropq(dentry, bindex, flags);
++ else {
++ int wkq_err;
++ struct do_diropq_args args = {
++ .errp = &diropq,
++ .dentry = dentry,
++ .bindex = bindex,
++ .flags = flags
++ };
++
++ wkq_err = au_wkq_wait(call_do_diropq, &args);
++ if (unlikely(wkq_err))
++ diropq = ERR_PTR(wkq_err);
++ }
++
++ return diropq;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * lookup whiteout dentry.
++ * @h_parent: lower parent dentry which must exist and be locked
++ * @base_name: name of dentry which will be whiteouted
++ * returns dentry for whiteout.
++ */
++struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name,
++ struct au_branch *br)
++{
++ int err;
++ struct qstr wh_name;
++ struct dentry *wh_dentry;
++
++ err = au_wh_name_alloc(&wh_name, base_name);
++ wh_dentry = ERR_PTR(err);
++ if (!err) {
++ wh_dentry = au_lkup_one(&wh_name, h_parent, br, /*nd*/NULL);
++ kfree(wh_name.name);
++ }
++ return wh_dentry;
++}
++
++/*
++ * link/create a whiteout for @dentry on @bindex.
++ */
++struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent)
++{
++ struct dentry *wh_dentry;
++ struct super_block *sb;
++ int err;
++
++ sb = dentry->d_sb;
++ wh_dentry = au_wh_lkup(h_parent, &dentry->d_name, au_sbr(sb, bindex));
++ if (!IS_ERR(wh_dentry) && !wh_dentry->d_inode) {
++ err = link_or_create_wh(sb, bindex, wh_dentry);
++ if (!err)
++ au_set_dbwh(dentry, bindex);
++ else {
++ dput(wh_dentry);
++ wh_dentry = ERR_PTR(err);
++ }
++ }
++
++ return wh_dentry;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* Delete all whiteouts in this directory on branch bindex. */
++static int del_wh_children(struct dentry *h_dentry, struct au_nhash *whlist,
++ aufs_bindex_t bindex, struct au_branch *br)
++{
++ int err;
++ unsigned long ul, n;
++ struct qstr wh_name;
++ char *p;
++ struct hlist_head *head;
++ struct au_vdir_wh *tpos;
++ struct hlist_node *pos;
++ struct au_vdir_destr *str;
++
++ err = -ENOMEM;
++ p = __getname();
++ wh_name.name = p;
++ if (unlikely(!wh_name.name))
++ goto out;
++
++ err = 0;
++ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
++ p += AUFS_WH_PFX_LEN;
++ n = whlist->nh_num;
++ head = whlist->nh_head;
++ for (ul = 0; !err && ul < n; ul++, head++) {
++ hlist_for_each_entry(tpos, pos, head, wh_hash) {
++ if (tpos->wh_bindex != bindex)
++ continue;
++
++ str = &tpos->wh_str;
++ if (str->len + AUFS_WH_PFX_LEN <= PATH_MAX) {
++ memcpy(p, str->name, str->len);
++ wh_name.len = AUFS_WH_PFX_LEN + str->len;
++ err = unlink_wh_name(h_dentry, &wh_name, br);
++ if (!err)
++ continue;
++ break;
++ }
++ AuIOErr("whiteout name too long %.*s\n",
++ str->len, str->name);
++ err = -EIO;
++ break;
++ }
++ }
++ __putname(wh_name.name);
++
++ out:
++ return err;
++}
++
++struct del_wh_children_args {
++ int *errp;
++ struct dentry *h_dentry;
++ struct au_nhash whlist;
++ aufs_bindex_t bindex;
++ struct au_branch *br;
++};
++
++static void call_del_wh_children(void *args)
++{
++ struct del_wh_children_args *a = args;
++ *a->errp = del_wh_children(a->h_dentry, &a->whlist, a->bindex, a->br);
++}
++
++/* ---------------------------------------------------------------------- */
++
++struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp)
++{
++ struct au_whtmp_rmdir *whtmp;
++ int err;
++
++ SiMustAnyLock(sb);
++
++ whtmp = kmalloc(sizeof(*whtmp), gfp);
++ if (unlikely(!whtmp)) {
++ whtmp = ERR_PTR(-ENOMEM);
++ goto out;
++ }
++
++ whtmp->dir = NULL;
++ whtmp->wh_dentry = NULL;
++ err = au_nhash_alloc(&whtmp->whlist, au_sbi(sb)->si_rdhash, gfp);
++ if (!err)
++ return whtmp; /* success */
++
++ kfree(whtmp);
++ whtmp = ERR_PTR(err);
++
++ out:
++ return whtmp;
++}
++
++void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp)
++{
++ dput(whtmp->wh_dentry);
++ iput(whtmp->dir);
++ au_nhash_wh_free(&whtmp->whlist);
++ kfree(whtmp);
++}
++
++/*
++ * rmdir the whiteouted temporary named dir @h_dentry.
++ * @whlist: whiteouted children.
++ */
++int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex,
++ struct dentry *wh_dentry, struct au_nhash *whlist)
++{
++ int err;
++ struct path h_tmp;
++ struct inode *wh_inode, *h_dir;
++ struct au_branch *br;
++
++ h_dir = wh_dentry->d_parent->d_inode; /* dir inode is locked */
++ IMustLock(h_dir);
++
++ br = au_sbr(dir->i_sb, bindex);
++ wh_inode = wh_dentry->d_inode;
++ mutex_lock_nested(&wh_inode->i_mutex, AuLsc_I_CHILD);
++
++ /*
++ * someone else might change some whiteouts while we were sleeping.
++ * it means this whlist may have an obsoleted entry.
++ */
++ if (!au_test_h_perm_sio(wh_inode, MAY_EXEC | MAY_WRITE))
++ err = del_wh_children(wh_dentry, whlist, bindex, br);
++ else {
++ int wkq_err;
++ struct del_wh_children_args args = {
++ .errp = &err,
++ .h_dentry = wh_dentry,
++ .whlist = *whlist,
++ .bindex = bindex,
++ .br = br
++ };
++
++ wkq_err = au_wkq_wait(call_del_wh_children, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++ mutex_unlock(&wh_inode->i_mutex);
++
++ if (!err) {
++ h_tmp.dentry = wh_dentry;
++ h_tmp.mnt = br->br_mnt;
++ err = vfsub_rmdir(h_dir, &h_tmp);
++ /* d_drop(h_dentry); */
++ }
++
++ if (!err) {
++ if (au_ibstart(dir) == bindex) {
++ au_cpup_attr_timesizes(dir);
++ drop_nlink(dir);
++ }
++ return 0; /* success */
++ }
++
++ AuWarn("failed removing %.*s(%d), ignored\n",
++ AuDLNPair(wh_dentry), err);
++ return err;
++}
++
++static void call_rmdir_whtmp(void *args)
++{
++ int err;
++ struct au_whtmp_rmdir *a = args;
++ struct super_block *sb;
++ struct dentry *h_parent;
++ struct inode *h_dir;
++ struct au_branch *br;
++ struct au_hinode *hdir;
++
++ /* rmdir by nfsd may cause deadlock with this i_mutex */
++ /* mutex_lock(&a->dir->i_mutex); */
++ sb = a->dir->i_sb;
++ si_noflush_read_lock(sb);
++ err = au_test_ro(sb, a->bindex, NULL);
++ if (unlikely(err))
++ goto out;
++
++ err = -EIO;
++ br = au_sbr(sb, a->bindex);
++ ii_write_lock_parent(a->dir);
++ h_parent = dget_parent(a->wh_dentry);
++ h_dir = h_parent->d_inode;
++ hdir = au_hi(a->dir, a->bindex);
++ au_hin_imtx_lock_nested(hdir, AuLsc_I_PARENT);
++ err = au_h_verify(a->wh_dentry, au_opt_udba(sb), h_dir, h_parent, br);
++ if (!err) {
++ err = mnt_want_write(br->br_mnt);
++ if (!err) {
++ err = au_whtmp_rmdir(a->dir, a->bindex, a->wh_dentry,
++ &a->whlist);
++ mnt_drop_write(br->br_mnt);
++ }
++ }
++ au_hin_imtx_unlock(hdir);
++ dput(h_parent);
++ ii_write_unlock(a->dir);
++
++ out:
++ /* mutex_unlock(&a->dir->i_mutex); */
++ au_nwt_done(&au_sbi(sb)->si_nowait);
++ si_read_unlock(sb);
++ au_whtmp_rmdir_free(a);
++ if (unlikely(err))
++ AuIOErr("err %d\n", err);
++}
++
++void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex,
++ struct dentry *wh_dentry, struct au_whtmp_rmdir *args)
++{
++ int wkq_err;
++
++ IMustLock(dir);
++
++ /* all post-process will be done in do_rmdir_whtmp(). */
++ args->dir = au_igrab(dir);
++ args->bindex = bindex;
++ args->wh_dentry = dget(wh_dentry);
++ wkq_err = au_wkq_nowait(call_rmdir_whtmp, args, dir->i_sb);
++ if (unlikely(wkq_err)) {
++ AuWarn("rmdir error %.*s (%d), ignored\n",
++ AuDLNPair(wh_dentry), wkq_err);
++ au_whtmp_rmdir_free(args);
++ }
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/whout.h linux-2.6.31.5/fs/aufs/whout.h
+--- linux-2.6.31.5.orig/fs/aufs/whout.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/whout.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,87 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * whiteout for logical deletion and opaque directory
++ */
++
++#ifndef __AUFS_WHOUT_H__
++#define __AUFS_WHOUT_H__
++
++#ifdef __KERNEL__
++
++#include <linux/aufs_type.h>
++#include "dir.h"
++
++/* whout.c */
++int au_wh_name_alloc(struct qstr *wh, const struct qstr *name);
++struct au_branch;
++int au_wh_test(struct dentry *h_parent, struct qstr *wh_name,
++ struct au_branch *br, int try_sio);
++int au_diropq_test(struct dentry *h_dentry, struct au_branch *br);
++struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br,
++ struct qstr *prefix);
++int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br);
++int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path,
++ struct dentry *dentry);
++int au_wh_init(struct dentry *h_parent, struct au_branch *br,
++ struct super_block *sb);
++
++/* diropq flags */
++#define AuDiropq_CREATE 1
++#define au_ftest_diropq(flags, name) ((flags) & AuDiropq_##name)
++#define au_fset_diropq(flags, name) { (flags) |= AuDiropq_##name; }
++#define au_fclr_diropq(flags, name) { (flags) &= ~AuDiropq_##name; }
++
++struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex,
++ unsigned int flags);
++struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name,
++ struct au_branch *br);
++struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex,
++ struct dentry *h_parent);
++
++/* real rmdir for the whiteout-ed dir */
++struct au_whtmp_rmdir {
++ struct inode *dir;
++ aufs_bindex_t bindex;
++ struct dentry *wh_dentry;
++ struct au_nhash whlist;
++};
++
++struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp);
++void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp);
++int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex,
++ struct dentry *wh_dentry, struct au_nhash *whlist);
++void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex,
++ struct dentry *wh_dentry, struct au_whtmp_rmdir *args);
++
++/* ---------------------------------------------------------------------- */
++
++static inline struct dentry *au_diropq_create(struct dentry *dentry,
++ aufs_bindex_t bindex)
++{
++ return au_diropq_sio(dentry, bindex, AuDiropq_CREATE);
++}
++
++static inline int au_diropq_remove(struct dentry *dentry, aufs_bindex_t bindex)
++{
++ return PTR_ERR(au_diropq_sio(dentry, bindex, !AuDiropq_CREATE));
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_WHOUT_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/wkq.c linux-2.6.31.5/fs/aufs/wkq.c
+--- linux-2.6.31.5.orig/fs/aufs/wkq.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/wkq.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,259 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * workqueue for asynchronous/super-io operations
++ * todo: try new dredential scheme
++ */
++
++#include <linux/module.h>
++#include "aufs.h"
++
++/* internal workqueue named AUFS_WKQ_NAME */
++static struct au_wkq {
++ struct workqueue_struct *q;
++
++ /* balancing */
++ atomic_t busy;
++} *au_wkq;
++
++struct au_wkinfo {
++ struct work_struct wk;
++ struct super_block *sb;
++
++ unsigned int flags; /* see wkq.h */
++
++ au_wkq_func_t func;
++ void *args;
++
++ atomic_t *busyp;
++ struct completion *comp;
++};
++
++/* ---------------------------------------------------------------------- */
++
++static int enqueue(struct au_wkq *wkq, struct au_wkinfo *wkinfo)
++{
++ wkinfo->busyp = &wkq->busy;
++ if (au_ftest_wkq(wkinfo->flags, WAIT))
++ return !queue_work(wkq->q, &wkinfo->wk);
++ else
++ return !schedule_work(&wkinfo->wk);
++}
++
++static void do_wkq(struct au_wkinfo *wkinfo)
++{
++ unsigned int idle, n;
++ int i, idle_idx;
++
++ while (1) {
++ if (au_ftest_wkq(wkinfo->flags, WAIT)) {
++ idle_idx = 0;
++ idle = UINT_MAX;
++ for (i = 0; i < aufs_nwkq; i++) {
++ n = atomic_inc_return(&au_wkq[i].busy);
++ if (n == 1 && !enqueue(au_wkq + i, wkinfo))
++ return; /* success */
++
++ if (n < idle) {
++ idle_idx = i;
++ idle = n;
++ }
++ atomic_dec(&au_wkq[i].busy);
++ }
++ } else
++ idle_idx = aufs_nwkq;
++
++ atomic_inc(&au_wkq[idle_idx].busy);
++ if (!enqueue(au_wkq + idle_idx, wkinfo))
++ return; /* success */
++
++ /* impossible? */
++ AuWarn1("failed to queue_work()\n");
++ yield();
++ }
++}
++
++static void wkq_func(struct work_struct *wk)
++{
++ struct au_wkinfo *wkinfo = container_of(wk, struct au_wkinfo, wk);
++
++ wkinfo->func(wkinfo->args);
++ atomic_dec_return(wkinfo->busyp);
++ if (au_ftest_wkq(wkinfo->flags, WAIT))
++ complete(wkinfo->comp);
++ else {
++ kobject_put(&au_sbi(wkinfo->sb)->si_kobj);
++ module_put(THIS_MODULE);
++ kfree(wkinfo);
++ }
++}
++
++/*
++ * Since struct completion is large, try allocating it dynamically.
++ */
++#if defined(CONFIG_4KSTACKS) || defined(AuTest4KSTACKS)
++#define AuWkqCompDeclare(name) struct completion *comp = NULL
++
++static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp)
++{
++ *comp = kmalloc(sizeof(**comp), GFP_NOFS);
++ if (*comp) {
++ init_completion(*comp);
++ wkinfo->comp = *comp;
++ return 0;
++ }
++ return -ENOMEM;
++}
++
++static void au_wkq_comp_free(struct completion *comp)
++{
++ kfree(comp);
++}
++
++#else
++
++/* no braces */
++#define AuWkqCompDeclare(name) \
++ DECLARE_COMPLETION_ONSTACK(_ ## name); \
++ struct completion *comp = &_ ## name
++
++static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp)
++{
++ wkinfo->comp = *comp;
++ return 0;
++}
++
++static void au_wkq_comp_free(struct completion *comp __maybe_unused)
++{
++ /* empty */
++}
++#endif /* 4KSTACKS */
++
++static void au_wkq_run(struct au_wkinfo *wkinfo)
++{
++ au_dbg_verify_kthread();
++ INIT_WORK(&wkinfo->wk, wkq_func);
++ do_wkq(wkinfo);
++}
++
++int au_wkq_wait(au_wkq_func_t func, void *args)
++{
++ int err;
++ AuWkqCompDeclare(comp);
++ struct au_wkinfo wkinfo = {
++ .flags = AuWkq_WAIT,
++ .func = func,
++ .args = args
++ };
++
++ err = au_wkq_comp_alloc(&wkinfo, &comp);
++ if (!err) {
++ au_wkq_run(&wkinfo);
++ /* no timeout, no interrupt */
++ wait_for_completion(wkinfo.comp);
++ au_wkq_comp_free(comp);
++ }
++
++ return err;
++
++}
++
++int au_wkq_nowait(au_wkq_func_t func, void *args, struct super_block *sb)
++{
++ int err;
++ struct au_wkinfo *wkinfo;
++
++ atomic_inc(&au_sbi(sb)->si_nowait.nw_len);
++
++ /*
++ * wkq_func() must free this wkinfo.
++ * it highly depends upon the implementation of workqueue.
++ */
++ err = 0;
++ wkinfo = kmalloc(sizeof(*wkinfo), GFP_NOFS);
++ if (wkinfo) {
++ wkinfo->sb = sb;
++ wkinfo->flags = !AuWkq_WAIT;
++ wkinfo->func = func;
++ wkinfo->args = args;
++ wkinfo->comp = NULL;
++ kobject_get(&au_sbi(sb)->si_kobj);
++ __module_get(THIS_MODULE);
++
++ au_wkq_run(wkinfo);
++ } else {
++ err = -ENOMEM;
++ atomic_dec(&au_sbi(sb)->si_nowait.nw_len);
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++void au_nwt_init(struct au_nowait_tasks *nwt)
++{
++ atomic_set(&nwt->nw_len, 0);
++ /* smp_mb();*/ /* atomic_set */
++ init_waitqueue_head(&nwt->nw_wq);
++}
++
++void au_wkq_fin(void)
++{
++ int i;
++
++ for (i = 0; i < aufs_nwkq; i++)
++ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q))
++ destroy_workqueue(au_wkq[i].q);
++ kfree(au_wkq);
++}
++
++int __init au_wkq_init(void)
++{
++ int err, i;
++ struct au_wkq *nowaitq;
++
++ /* '+1' is for accounting of nowait queue */
++ err = -ENOMEM;
++ au_wkq = kcalloc(aufs_nwkq + 1, sizeof(*au_wkq), GFP_NOFS);
++ if (unlikely(!au_wkq))
++ goto out;
++
++ err = 0;
++ for (i = 0; i < aufs_nwkq; i++) {
++ au_wkq[i].q = create_singlethread_workqueue(AUFS_WKQ_NAME);
++ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q)) {
++ atomic_set(&au_wkq[i].busy, 0);
++ continue;
++ }
++
++ err = PTR_ERR(au_wkq[i].q);
++ au_wkq_fin();
++ goto out;
++ }
++
++ /* nowait accounting */
++ nowaitq = au_wkq + aufs_nwkq;
++ atomic_set(&nowaitq->busy, 0);
++ nowaitq->q = NULL;
++ /* smp_mb(); */ /* atomic_set */
++
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/aufs/wkq.h linux-2.6.31.5/fs/aufs/wkq.h
+--- linux-2.6.31.5.orig/fs/aufs/wkq.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/wkq.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,82 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * workqueue for asynchronous/super-io operations
++ * todo: try new credentials management scheme
++ */
++
++#ifndef __AUFS_WKQ_H__
++#define __AUFS_WKQ_H__
++
++#ifdef __KERNEL__
++
++#include <linux/sched.h>
++#include <linux/wait.h>
++#include <linux/aufs_type.h>
++
++struct super_block;
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * in the next operation, wait for the 'nowait' tasks in system-wide workqueue
++ */
++struct au_nowait_tasks {
++ atomic_t nw_len;
++ wait_queue_head_t nw_wq;
++};
++
++/* ---------------------------------------------------------------------- */
++
++typedef void (*au_wkq_func_t)(void *args);
++
++/* wkq flags */
++#define AuWkq_WAIT 1
++#define au_ftest_wkq(flags, name) ((flags) & AuWkq_##name)
++#define au_fset_wkq(flags, name) { (flags) |= AuWkq_##name; }
++#define au_fclr_wkq(flags, name) { (flags) &= ~AuWkq_##name; }
++
++/* wkq.c */
++int au_wkq_wait(au_wkq_func_t func, void *args);
++int au_wkq_nowait(au_wkq_func_t func, void *args, struct super_block *sb);
++void au_nwt_init(struct au_nowait_tasks *nwt);
++int __init au_wkq_init(void);
++void au_wkq_fin(void);
++
++/* ---------------------------------------------------------------------- */
++
++static inline int au_test_wkq(struct task_struct *tsk)
++{
++ return !tsk->mm && !strcmp(tsk->comm, AUFS_WKQ_NAME);
++}
++
++static inline void au_nwt_done(struct au_nowait_tasks *nwt)
++{
++ if (!atomic_dec_return(&nwt->nw_len))
++ wake_up_all(&nwt->nw_wq);
++}
++
++static inline int au_nwt_flush(struct au_nowait_tasks *nwt)
++{
++ wait_event(nwt->nw_wq, !atomic_read(&nwt->nw_len));
++ return 0;
++}
++
++#endif /* __KERNEL__ */
++#endif /* __AUFS_WKQ_H__ */
+diff -Nur linux-2.6.31.5.orig/fs/aufs/xino.c linux-2.6.31.5/fs/aufs/xino.c
+--- linux-2.6.31.5.orig/fs/aufs/xino.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/fs/aufs/xino.c 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,1200 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++/*
++ * external inode number translation table and bitmap
++ */
++
++#include <linux/file.h>
++#include <linux/seq_file.h>
++#include <linux/uaccess.h>
++#include "aufs.h"
++
++ssize_t xino_fread(au_readf_t func, struct file *file, void *buf, size_t size,
++ loff_t *pos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ do {
++ /* todo: signal_pending? */
++ err = func(file, (char __user *)buf, size, pos);
++ } while (err == -EAGAIN || err == -EINTR);
++ set_fs(oldfs);
++
++#if 0 /* reserved for future use */
++ if (err > 0)
++ fsnotify_access(file->f_dentry);
++#endif
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static ssize_t do_xino_fwrite(au_writef_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ lockdep_off();
++ do {
++ /* todo: signal_pending? */
++ err = func(file, (const char __user *)buf, size, pos);
++ } while (err == -EAGAIN || err == -EINTR);
++ lockdep_on();
++ set_fs(oldfs);
++
++#if 0 /* reserved for future use */
++ if (err > 0)
++ fsnotify_modify(file->f_dentry);
++#endif
++
++ return err;
++}
++
++struct do_xino_fwrite_args {
++ ssize_t *errp;
++ au_writef_t func;
++ struct file *file;
++ void *buf;
++ size_t size;
++ loff_t *pos;
++};
++
++static void call_do_xino_fwrite(void *args)
++{
++ struct do_xino_fwrite_args *a = args;
++ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
++}
++
++ssize_t xino_fwrite(au_writef_t func, struct file *file, void *buf, size_t size,
++ loff_t *pos)
++{
++ ssize_t err;
++
++ /* todo: signal block and no wkq? */
++ /* todo: new credential scheme */
++ /*
++ * it breaks RLIMIT_FSIZE and normal user's limit,
++ * users should care about quota and real 'filesystem full.'
++ */
++ if (!au_test_wkq(current)) {
++ int wkq_err;
++ struct do_xino_fwrite_args args = {
++ .errp = &err,
++ .func = func,
++ .file = file,
++ .buf = buf,
++ .size = size,
++ .pos = pos
++ };
++
++ wkq_err = au_wkq_wait(call_do_xino_fwrite, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ } else
++ err = do_xino_fwrite(func, file, buf, size, pos);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * create a new xinofile at the same place/path as @base_file.
++ */
++struct file *au_xino_create2(struct file *base_file, struct file *copy_src)
++{
++ struct file *file;
++ struct dentry *base, *dentry, *parent;
++ struct inode *dir;
++ struct qstr *name;
++ int err;
++
++ base = base_file->f_dentry;
++ parent = base->d_parent; /* dir inode is locked */
++ dir = parent->d_inode;
++ IMustLock(dir);
++
++ file = ERR_PTR(-EINVAL);
++ name = &base->d_name;
++ dentry = vfsub_lookup_one_len(name->name, parent, name->len);
++ if (IS_ERR(dentry)) {
++ file = (void *)dentry;
++ AuErr("%.*s lookup err %ld\n", AuLNPair(name), PTR_ERR(dentry));
++ goto out;
++ }
++
++ /* no need to mnt_want_write() since we call dentry_open() later */
++ err = vfs_create(dir, dentry, S_IRUGO | S_IWUGO, NULL);
++ if (unlikely(err)) {
++ file = ERR_PTR(err);
++ AuErr("%.*s create err %d\n", AuLNPair(name), err);
++ goto out_dput;
++ }
++
++ file = dentry_open(dget(dentry), mntget(base_file->f_vfsmnt),
++ O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE,
++ current_cred());
++ if (IS_ERR(file)) {
++ AuErr("%.*s open err %ld\n", AuLNPair(name), PTR_ERR(file));
++ goto out_dput;
++ }
++
++ err = vfsub_unlink(dir, &file->f_path, /*force*/0);
++ if (unlikely(err)) {
++ AuErr("%.*s unlink err %d\n", AuLNPair(name), err);
++ goto out_fput;
++ }
++
++ if (copy_src) {
++ /* no one can touch copy_src xino */
++ err = au_copy_file(file, copy_src,
++ i_size_read(copy_src->f_dentry->d_inode));
++ if (unlikely(err)) {
++ AuErr("%.*s copy err %d\n", AuLNPair(name), err);
++ goto out_fput;
++ }
++ }
++ goto out_dput; /* success */
++
++ out_fput:
++ fput(file);
++ file = ERR_PTR(err);
++ out_dput:
++ dput(dentry);
++ out:
++ return file;
++}
++
++struct au_xino_lock_dir {
++ struct au_hinode *hdir;
++ struct dentry *parent;
++ struct mutex *mtx;
++};
++
++static void au_xino_lock_dir(struct super_block *sb, struct file *xino,
++ struct au_xino_lock_dir *ldir)
++{
++ aufs_bindex_t brid, bindex;
++
++ ldir->hdir = NULL;
++ bindex = -1;
++ brid = au_xino_brid(sb);
++ if (brid >= 0)
++ bindex = au_br_index(sb, brid);
++ if (bindex >= 0) {
++ ldir->hdir = au_hi(sb->s_root->d_inode, bindex);
++ au_hin_imtx_lock_nested(ldir->hdir, AuLsc_I_PARENT);
++ } else {
++ ldir->parent = dget_parent(xino->f_dentry);
++ ldir->mtx = &ldir->parent->d_inode->i_mutex;
++ mutex_lock_nested(ldir->mtx, AuLsc_I_PARENT);
++ }
++}
++
++static void au_xino_unlock_dir(struct au_xino_lock_dir *ldir)
++{
++ if (ldir->hdir)
++ au_hin_imtx_unlock(ldir->hdir);
++ else {
++ mutex_unlock(ldir->mtx);
++ dput(ldir->parent);
++ }
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* trucate xino files asynchronously */
++
++int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex)
++{
++ int err;
++ aufs_bindex_t bi, bend;
++ struct au_branch *br;
++ struct file *new_xino, *file;
++ struct super_block *h_sb;
++ struct au_xino_lock_dir ldir;
++
++ err = -EINVAL;
++ bend = au_sbend(sb);
++ if (unlikely(bindex < 0 || bend < bindex))
++ goto out;
++ br = au_sbr(sb, bindex);
++ file = br->br_xino.xi_file;
++ if (!file)
++ goto out;
++
++ au_xino_lock_dir(sb, file, &ldir);
++ /* mnt_want_write() is unnecessary here */
++ new_xino = au_xino_create2(file, file);
++ au_xino_unlock_dir(&ldir);
++ err = PTR_ERR(new_xino);
++ if (IS_ERR(new_xino))
++ goto out;
++ err = 0;
++ fput(file);
++ br->br_xino.xi_file = new_xino;
++
++ h_sb = br->br_mnt->mnt_sb;
++ for (bi = 0; bi <= bend; bi++) {
++ if (unlikely(bi == bindex))
++ continue;
++ br = au_sbr(sb, bi);
++ if (br->br_mnt->mnt_sb != h_sb)
++ continue;
++
++ fput(br->br_xino.xi_file);
++ br->br_xino.xi_file = new_xino;
++ get_file(new_xino);
++ }
++
++ out:
++ return err;
++}
++
++struct xino_do_trunc_args {
++ struct super_block *sb;
++ struct au_branch *br;
++};
++
++static void xino_do_trunc(void *_args)
++{
++ struct xino_do_trunc_args *args = _args;
++ struct super_block *sb;
++ struct au_branch *br;
++ struct inode *dir;
++ int err;
++ aufs_bindex_t bindex;
++
++ err = 0;
++ sb = args->sb;
++ dir = sb->s_root->d_inode;
++ br = args->br;
++
++ si_noflush_write_lock(sb);
++ ii_read_lock_parent(dir);
++ bindex = au_br_index(sb, br->br_id);
++ err = au_xino_trunc(sb, bindex);
++ if (!err
++ && br->br_xino.xi_file->f_dentry->d_inode->i_blocks
++ >= br->br_xino_upper)
++ br->br_xino_upper += AUFS_XINO_TRUNC_STEP;
++
++ ii_read_unlock(dir);
++ if (unlikely(err))
++ AuWarn("err b%d, (%d)\n", bindex, err);
++ atomic_dec(&br->br_xino_running);
++ atomic_dec(&br->br_count);
++ au_nwt_done(&au_sbi(sb)->si_nowait);
++ si_write_unlock(sb);
++ kfree(args);
++}
++
++static void xino_try_trunc(struct super_block *sb, struct au_branch *br)
++{
++ struct xino_do_trunc_args *args;
++ int wkq_err;
++
++ if (br->br_xino.xi_file->f_dentry->d_inode->i_blocks
++ < br->br_xino_upper)
++ return;
++
++ if (atomic_inc_return(&br->br_xino_running) > 1)
++ goto out;
++
++ /* lock and kfree() will be called in trunc_xino() */
++ args = kmalloc(sizeof(*args), GFP_NOFS);
++ if (unlikely(!args)) {
++ AuErr1("no memory\n");
++ goto out_args;
++ }
++
++ atomic_inc_return(&br->br_count);
++ args->sb = sb;
++ args->br = br;
++ wkq_err = au_wkq_nowait(xino_do_trunc, args, sb);
++ if (!wkq_err)
++ return; /* success */
++
++ AuErr("wkq %d\n", wkq_err);
++ atomic_dec_return(&br->br_count);
++
++ out_args:
++ kfree(args);
++ out:
++ atomic_dec_return(&br->br_xino_running);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_xino_do_write(au_writef_t write, struct file *file,
++ ino_t h_ino, ino_t ino)
++{
++ loff_t pos;
++ ssize_t sz;
++
++ pos = h_ino;
++ if (unlikely(au_loff_max / sizeof(ino) - 1 < pos)) {
++ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino);
++ return -EFBIG;
++ }
++ pos *= sizeof(ino);
++ sz = xino_fwrite(write, file, &ino, sizeof(ino), &pos);
++ if (sz == sizeof(ino))
++ return 0; /* success */
++
++ AuIOErr("write failed (%zd)\n", sz);
++ return -EIO;
++}
++
++/*
++ * write @ino to the xinofile for the specified branch{@sb, @bindex}
++ * at the position of @h_ino.
++ * even if @ino is zero, it is written to the xinofile and means no entry.
++ * if the size of the xino file on a specific filesystem exceeds the watermark,
++ * try truncating it.
++ */
++int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t ino)
++{
++ int err;
++ unsigned int mnt_flags;
++ struct au_branch *br;
++
++ BUILD_BUG_ON(sizeof(long long) != sizeof(au_loff_max)
++ || ((loff_t)-1) > 0);
++ SiMustAnyLock(sb);
++
++ mnt_flags = au_mntflags(sb);
++ if (!au_opt_test(mnt_flags, XINO))
++ return 0;
++
++ br = au_sbr(sb, bindex);
++ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file,
++ h_ino, ino);
++ if (!err) {
++ if (au_opt_test(mnt_flags, TRUNC_XINO)
++ && au_test_fs_trunc_xino(br->br_mnt->mnt_sb))
++ xino_try_trunc(sb, br);
++ return 0; /* success */
++ }
++
++ AuIOErr("write failed (%d)\n", err);
++ return -EIO;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* aufs inode number bitmap */
++
++static const int page_bits = (int)PAGE_SIZE * BITS_PER_BYTE;
++static ino_t xib_calc_ino(unsigned long pindex, int bit)
++{
++ ino_t ino;
++
++ AuDebugOn(bit < 0 || page_bits <= bit);
++ ino = AUFS_FIRST_INO + pindex * page_bits + bit;
++ return ino;
++}
++
++static void xib_calc_bit(ino_t ino, unsigned long *pindex, int *bit)
++{
++ AuDebugOn(ino < AUFS_FIRST_INO);
++ ino -= AUFS_FIRST_INO;
++ *pindex = ino / page_bits;
++ *bit = ino % page_bits;
++}
++
++static int xib_pindex(struct super_block *sb, unsigned long pindex)
++{
++ int err;
++ loff_t pos;
++ ssize_t sz;
++ struct au_sbinfo *sbinfo;
++ struct file *xib;
++ unsigned long *p;
++
++ sbinfo = au_sbi(sb);
++ MtxMustLock(&sbinfo->si_xib_mtx);
++ AuDebugOn(pindex > ULONG_MAX / PAGE_SIZE
++ || !au_opt_test(sbinfo->si_mntflags, XINO));
++
++ if (pindex == sbinfo->si_xib_last_pindex)
++ return 0;
++
++ xib = sbinfo->si_xib;
++ p = sbinfo->si_xib_buf;
++ pos = sbinfo->si_xib_last_pindex;
++ pos *= PAGE_SIZE;
++ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
++ if (unlikely(sz != PAGE_SIZE))
++ goto out;
++
++ pos = pindex;
++ pos *= PAGE_SIZE;
++ if (i_size_read(xib->f_dentry->d_inode) >= pos + PAGE_SIZE)
++ sz = xino_fread(sbinfo->si_xread, xib, p, PAGE_SIZE, &pos);
++ else {
++ memset(p, 0, PAGE_SIZE);
++ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
++ }
++ if (sz == PAGE_SIZE) {
++ sbinfo->si_xib_last_pindex = pindex;
++ return 0; /* success */
++ }
++
++ out:
++ AuIOErr1("write failed (%zd)\n", sz);
++ err = sz;
++ if (sz >= 0)
++ err = -EIO;
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t ino)
++{
++ int err, bit;
++ unsigned long pindex;
++ struct au_sbinfo *sbinfo;
++
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return 0;
++
++ err = 0;
++ if (ino) {
++ sbinfo = au_sbi(sb);
++ xib_calc_bit(ino, &pindex, &bit);
++ AuDebugOn(page_bits <= bit);
++ mutex_lock(&sbinfo->si_xib_mtx);
++ err = xib_pindex(sb, pindex);
++ if (!err) {
++ clear_bit(bit, sbinfo->si_xib_buf);
++ sbinfo->si_xib_next_bit = bit;
++ }
++ mutex_unlock(&sbinfo->si_xib_mtx);
++ }
++
++ if (!err)
++ err = au_xino_write(sb, bindex, h_ino, 0);
++ return err;
++}
++
++/* get an unused inode number from bitmap */
++ino_t au_xino_new_ino(struct super_block *sb)
++{
++ ino_t ino;
++ unsigned long *p, pindex, ul, pend;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++ int free_bit, err;
++
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return iunique(sb, AUFS_FIRST_INO);
++
++ sbinfo = au_sbi(sb);
++ mutex_lock(&sbinfo->si_xib_mtx);
++ p = sbinfo->si_xib_buf;
++ free_bit = sbinfo->si_xib_next_bit;
++ if (free_bit < page_bits && !test_bit(free_bit, p))
++ goto out; /* success */
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++
++ pindex = sbinfo->si_xib_last_pindex;
++ for (ul = pindex - 1; ul < ULONG_MAX; ul--) {
++ err = xib_pindex(sb, ul);
++ if (unlikely(err))
++ goto out_err;
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++ }
++
++ file = sbinfo->si_xib;
++ pend = i_size_read(file->f_dentry->d_inode) / PAGE_SIZE;
++ for (ul = pindex + 1; ul <= pend; ul++) {
++ err = xib_pindex(sb, ul);
++ if (unlikely(err))
++ goto out_err;
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++ }
++ BUG();
++
++ out:
++ set_bit(free_bit, p);
++ sbinfo->si_xib_next_bit++;
++ pindex = sbinfo->si_xib_last_pindex;
++ mutex_unlock(&sbinfo->si_xib_mtx);
++ ino = xib_calc_ino(pindex, free_bit);
++ AuDbg("i%lu\n", (unsigned long)ino);
++ return ino;
++ out_err:
++ mutex_unlock(&sbinfo->si_xib_mtx);
++ AuDbg("i0\n");
++ return 0;
++}
++
++/*
++ * read @ino from xinofile for the specified branch{@sb, @bindex}
++ * at the position of @h_ino.
++ * if @ino does not exist and @do_new is true, get new one.
++ */
++int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t *ino)
++{
++ int err;
++ ssize_t sz;
++ loff_t pos;
++ struct file *file;
++ struct au_sbinfo *sbinfo;
++
++ *ino = 0;
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return 0; /* no xino */
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ pos = h_ino;
++ if (unlikely(au_loff_max / sizeof(*ino) - 1 < pos)) {
++ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino);
++ return -EFBIG;
++ }
++ pos *= sizeof(*ino);
++
++ file = au_sbr(sb, bindex)->br_xino.xi_file;
++ if (i_size_read(file->f_dentry->d_inode) < pos + sizeof(*ino))
++ return 0; /* no ino */
++
++ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &pos);
++ if (sz == sizeof(*ino))
++ return 0; /* success */
++
++ err = sz;
++ if (unlikely(sz >= 0)) {
++ err = -EIO;
++ AuIOErr("xino read error (%zd)\n", sz);
++ }
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* create and set a new xino file */
++
++struct file *au_xino_create(struct super_block *sb, char *fname, int silent)
++{
++ struct file *file;
++ struct dentry *h_parent, *d;
++ struct inode *h_dir;
++ int err;
++
++ /*
++ * at mount-time, and the xino file is the default path,
++ * hinotify is disabled so we have no inotify events to ignore.
++ * when a user specified the xino, we cannot get au_hdir to be ignored.
++ */
++ file = vfsub_filp_open(fname, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE,
++ S_IRUGO | S_IWUGO);
++ if (IS_ERR(file)) {
++ if (!silent)
++ AuErr("open %s(%ld)\n", fname, PTR_ERR(file));
++ return file;
++ }
++
++ /* keep file count */
++ h_parent = dget_parent(file->f_dentry);
++ h_dir = h_parent->d_inode;
++ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
++ /* mnt_want_write() is unnecessary here */
++ err = vfsub_unlink(h_dir, &file->f_path, /*force*/0);
++ mutex_unlock(&h_dir->i_mutex);
++ dput(h_parent);
++ if (unlikely(err)) {
++ if (!silent)
++ AuErr("unlink %s(%d)\n", fname, err);
++ goto out;
++ }
++
++ err = -EINVAL;
++ d = file->f_dentry;
++ if (unlikely(sb == d->d_sb)) {
++ if (!silent)
++ AuErr("%s must be outside\n", fname);
++ goto out;
++ }
++ if (unlikely(au_test_fs_bad_xino(d->d_sb))) {
++ if (!silent)
++ AuErr("xino doesn't support %s(%s)\n",
++ fname, au_sbtype(d->d_sb));
++ goto out;
++ }
++ return file; /* success */
++
++ out:
++ fput(file);
++ file = ERR_PTR(err);
++ return file;
++}
++
++/*
++ * find another branch who is on the same filesystem of the specified
++ * branch{@btgt}. search until @bend.
++ */
++static int is_sb_shared(struct super_block *sb, aufs_bindex_t btgt,
++ aufs_bindex_t bend)
++{
++ aufs_bindex_t bindex;
++ struct super_block *tgt_sb = au_sbr_sb(sb, btgt);
++
++ for (bindex = 0; bindex < btgt; bindex++)
++ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex)))
++ return bindex;
++ for (bindex++; bindex <= bend; bindex++)
++ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex)))
++ return bindex;
++ return -1;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * initialize the xinofile for the specified branch @br
++ * at the place/path where @base_file indicates.
++ * test whether another branch is on the same filesystem or not,
++ * if @do_test is true.
++ */
++int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t h_ino,
++ struct file *base_file, int do_test)
++{
++ int err;
++ ino_t ino;
++ aufs_bindex_t bend, bindex;
++ struct au_branch *shared_br, *b;
++ struct file *file;
++ struct super_block *tgt_sb;
++
++ shared_br = NULL;
++ bend = au_sbend(sb);
++ if (do_test) {
++ tgt_sb = br->br_mnt->mnt_sb;
++ for (bindex = 0; bindex <= bend; bindex++) {
++ b = au_sbr(sb, bindex);
++ if (tgt_sb == b->br_mnt->mnt_sb) {
++ shared_br = b;
++ break;
++ }
++ }
++ }
++
++ if (!shared_br || !shared_br->br_xino.xi_file) {
++ struct au_xino_lock_dir ldir;
++
++ au_xino_lock_dir(sb, base_file, &ldir);
++ /* mnt_want_write() is unnecessary here */
++ file = au_xino_create2(base_file, NULL);
++ au_xino_unlock_dir(&ldir);
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++ br->br_xino.xi_file = file;
++ } else {
++ br->br_xino.xi_file = shared_br->br_xino.xi_file;
++ get_file(br->br_xino.xi_file);
++ }
++
++ ino = AUFS_ROOT_INO;
++ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file,
++ h_ino, ino);
++ if (!err)
++ return 0; /* success */
++
++
++ out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* trucate a xino bitmap file */
++
++/* todo: slow */
++static int do_xib_restore(struct super_block *sb, struct file *file, void *page)
++{
++ int err, bit;
++ ssize_t sz;
++ unsigned long pindex;
++ loff_t pos, pend;
++ struct au_sbinfo *sbinfo;
++ au_readf_t func;
++ ino_t *ino;
++ unsigned long *p;
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ MtxMustLock(&sbinfo->si_xib_mtx);
++ p = sbinfo->si_xib_buf;
++ func = sbinfo->si_xread;
++ pend = i_size_read(file->f_dentry->d_inode);
++ pos = 0;
++ while (pos < pend) {
++ sz = xino_fread(func, file, page, PAGE_SIZE, &pos);
++ err = sz;
++ if (unlikely(sz <= 0))
++ goto out;
++
++ err = 0;
++ for (ino = page; sz > 0; ino++, sz -= sizeof(ino)) {
++ if (unlikely(*ino < AUFS_FIRST_INO))
++ continue;
++
++ xib_calc_bit(*ino, &pindex, &bit);
++ AuDebugOn(page_bits <= bit);
++ err = xib_pindex(sb, pindex);
++ if (!err)
++ set_bit(bit, p);
++ else
++ goto out;
++ }
++ }
++
++ out:
++ return err;
++}
++
++static int xib_restore(struct super_block *sb)
++{
++ int err;
++ aufs_bindex_t bindex, bend;
++ void *page;
++
++ err = -ENOMEM;
++ page = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!page))
++ goto out;
++
++ err = 0;
++ bend = au_sbend(sb);
++ for (bindex = 0; !err && bindex <= bend; bindex++)
++ if (!bindex || is_sb_shared(sb, bindex, bindex - 1) < 0)
++ err = do_xib_restore
++ (sb, au_sbr(sb, bindex)->br_xino.xi_file, page);
++ else
++ AuDbg("b%d\n", bindex);
++ free_page((unsigned long)page);
++
++ out:
++ return err;
++}
++
++int au_xib_trunc(struct super_block *sb)
++{
++ int err;
++ ssize_t sz;
++ loff_t pos;
++ struct au_xino_lock_dir ldir;
++ struct au_sbinfo *sbinfo;
++ unsigned long *p;
++ struct file *file;
++
++ SiMustWriteLock(sb);
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ if (!au_opt_test(sbinfo->si_mntflags, XINO))
++ goto out;
++
++ file = sbinfo->si_xib;
++ if (i_size_read(file->f_dentry->d_inode) <= PAGE_SIZE)
++ goto out;
++
++ au_xino_lock_dir(sb, file, &ldir);
++ /* mnt_want_write() is unnecessary here */
++ file = au_xino_create2(sbinfo->si_xib, NULL);
++ au_xino_unlock_dir(&ldir);
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++ fput(sbinfo->si_xib);
++ sbinfo->si_xib = file;
++
++ p = sbinfo->si_xib_buf;
++ memset(p, 0, PAGE_SIZE);
++ pos = 0;
++ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xib, p, PAGE_SIZE, &pos);
++ if (unlikely(sz != PAGE_SIZE)) {
++ err = sz;
++ AuIOErr("err %d\n", err);
++ if (sz >= 0)
++ err = -EIO;
++ goto out;
++ }
++
++ mutex_lock(&sbinfo->si_xib_mtx);
++ /* mnt_want_write() is unnecessary here */
++ err = xib_restore(sb);
++ mutex_unlock(&sbinfo->si_xib_mtx);
++
++out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * xino mount option handlers
++ */
++static au_readf_t find_readf(struct file *h_file)
++{
++ const struct file_operations *fop = h_file->f_op;
++
++ if (fop) {
++ if (fop->read)
++ return fop->read;
++ if (fop->aio_read)
++ return do_sync_read;
++ }
++ return ERR_PTR(-ENOSYS);
++}
++
++static au_writef_t find_writef(struct file *h_file)
++{
++ const struct file_operations *fop = h_file->f_op;
++
++ if (fop) {
++ if (fop->write)
++ return fop->write;
++ if (fop->aio_write)
++ return do_sync_write;
++ }
++ return ERR_PTR(-ENOSYS);
++}
++
++/* xino bitmap */
++static void xino_clear_xib(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ sbinfo->si_xread = NULL;
++ sbinfo->si_xwrite = NULL;
++ if (sbinfo->si_xib)
++ fput(sbinfo->si_xib);
++ sbinfo->si_xib = NULL;
++ free_page((unsigned long)sbinfo->si_xib_buf);
++ sbinfo->si_xib_buf = NULL;
++}
++
++static int au_xino_set_xib(struct super_block *sb, struct file *base)
++{
++ int err;
++ loff_t pos;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ file = au_xino_create2(base, sbinfo->si_xib);
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++ if (sbinfo->si_xib)
++ fput(sbinfo->si_xib);
++ sbinfo->si_xib = file;
++ sbinfo->si_xread = find_readf(file);
++ sbinfo->si_xwrite = find_writef(file);
++
++ err = -ENOMEM;
++ if (!sbinfo->si_xib_buf)
++ sbinfo->si_xib_buf = (void *)get_zeroed_page(GFP_NOFS);
++ if (unlikely(!sbinfo->si_xib_buf))
++ goto out_unset;
++
++ sbinfo->si_xib_last_pindex = 0;
++ sbinfo->si_xib_next_bit = 0;
++ if (i_size_read(file->f_dentry->d_inode) < PAGE_SIZE) {
++ pos = 0;
++ err = xino_fwrite(sbinfo->si_xwrite, file, sbinfo->si_xib_buf,
++ PAGE_SIZE, &pos);
++ if (unlikely(err != PAGE_SIZE))
++ goto out_free;
++ }
++ err = 0;
++ goto out; /* success */
++
++ out_free:
++ free_page((unsigned long)sbinfo->si_xib_buf);
++ sbinfo->si_xib_buf = NULL;
++ if (err >= 0)
++ err = -EIO;
++ out_unset:
++ fput(sbinfo->si_xib);
++ sbinfo->si_xib = NULL;
++ sbinfo->si_xread = NULL;
++ sbinfo->si_xwrite = NULL;
++ out:
++ return err;
++}
++
++/* xino for each branch */
++static void xino_clear_br(struct super_block *sb)
++{
++ aufs_bindex_t bindex, bend;
++ struct au_branch *br;
++
++ bend = au_sbend(sb);
++ for (bindex = 0; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ if (!br || !br->br_xino.xi_file)
++ continue;
++
++ fput(br->br_xino.xi_file);
++ br->br_xino.xi_file = NULL;
++ }
++}
++
++static int au_xino_set_br(struct super_block *sb, struct file *base)
++{
++ int err;
++ ino_t ino;
++ aufs_bindex_t bindex, bend, bshared;
++ struct {
++ struct file *old, *new;
++ } *fpair, *p;
++ struct au_branch *br;
++ struct inode *inode;
++ au_writef_t writef;
++
++ SiMustWriteLock(sb);
++
++ err = -ENOMEM;
++ bend = au_sbend(sb);
++ fpair = kcalloc(bend + 1, sizeof(*fpair), GFP_NOFS);
++ if (unlikely(!fpair))
++ goto out;
++
++ inode = sb->s_root->d_inode;
++ ino = AUFS_ROOT_INO;
++ writef = au_sbi(sb)->si_xwrite;
++ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++) {
++ br = au_sbr(sb, bindex);
++ bshared = is_sb_shared(sb, bindex, bindex - 1);
++ if (bshared >= 0) {
++ /* shared xino */
++ *p = fpair[bshared];
++ get_file(p->new);
++ }
++
++ if (!p->new) {
++ /* new xino */
++ p->old = br->br_xino.xi_file;
++ p->new = au_xino_create2(base, br->br_xino.xi_file);
++ err = PTR_ERR(p->new);
++ if (IS_ERR(p->new)) {
++ p->new = NULL;
++ goto out_pair;
++ }
++ }
++
++ err = au_xino_do_write(writef, p->new,
++ au_h_iptr(inode, bindex)->i_ino, ino);
++ if (unlikely(err))
++ goto out_pair;
++ }
++
++ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++) {
++ br = au_sbr(sb, bindex);
++ if (br->br_xino.xi_file)
++ fput(br->br_xino.xi_file);
++ get_file(p->new);
++ br->br_xino.xi_file = p->new;
++ }
++
++ out_pair:
++ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++)
++ if (p->new)
++ fput(p->new);
++ else
++ break;
++ kfree(fpair);
++ out:
++ return err;
++}
++
++void au_xino_clr(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++
++ au_xigen_clr(sb);
++ xino_clear_xib(sb);
++ xino_clear_br(sb);
++ sbinfo = au_sbi(sb);
++ /* lvalue, do not call au_mntflags() */
++ au_opt_clr(sbinfo->si_mntflags, XINO);
++}
++
++int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount)
++{
++ int err, skip;
++ struct dentry *parent, *cur_parent;
++ struct qstr *dname, *cur_name;
++ struct file *cur_xino;
++ struct inode *dir;
++ struct au_sbinfo *sbinfo;
++
++ SiMustWriteLock(sb);
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ parent = dget_parent(xino->file->f_dentry);
++ if (remount) {
++ skip = 0;
++ dname = &xino->file->f_dentry->d_name;
++ cur_xino = sbinfo->si_xib;
++ if (cur_xino) {
++ cur_parent = dget_parent(cur_xino->f_dentry);
++ cur_name = &cur_xino->f_dentry->d_name;
++ skip = (cur_parent == parent
++ && dname->len == cur_name->len
++ && !memcmp(dname->name, cur_name->name,
++ dname->len));
++ dput(cur_parent);
++ }
++ if (skip)
++ goto out;
++ }
++
++ au_opt_set(sbinfo->si_mntflags, XINO);
++ dir = parent->d_inode;
++ mutex_lock_nested(&dir->i_mutex, AuLsc_I_PARENT);
++ /* mnt_want_write() is unnecessary here */
++ err = au_xino_set_xib(sb, xino->file);
++ if (!err)
++ err = au_xigen_set(sb, xino->file);
++ if (!err)
++ err = au_xino_set_br(sb, xino->file);
++ mutex_unlock(&dir->i_mutex);
++ if (!err)
++ goto out; /* success */
++
++ /* reset all */
++ AuIOErr("failed creating xino(%d).\n", err);
++
++ out:
++ dput(parent);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * create a xinofile at the default place/path.
++ */
++struct file *au_xino_def(struct super_block *sb)
++{
++ struct file *file;
++ char *page, *p;
++ struct au_branch *br;
++ struct super_block *h_sb;
++ struct path path;
++ aufs_bindex_t bend, bindex, bwr;
++
++ br = NULL;
++ bend = au_sbend(sb);
++ bwr = -1;
++ for (bindex = 0; bindex <= bend; bindex++) {
++ br = au_sbr(sb, bindex);
++ if (au_br_writable(br->br_perm)
++ && !au_test_fs_bad_xino(br->br_mnt->mnt_sb)) {
++ bwr = bindex;
++ break;
++ }
++ }
++
++ if (bwr >= 0) {
++ file = ERR_PTR(-ENOMEM);
++ page = __getname();
++ if (unlikely(!page))
++ goto out;
++ path.mnt = br->br_mnt;
++ path.dentry = au_h_dptr(sb->s_root, bwr);
++ p = d_path(&path, page, PATH_MAX - sizeof(AUFS_XINO_FNAME));
++ file = (void *)p;
++ if (!IS_ERR(p)) {
++ strcat(p, "/" AUFS_XINO_FNAME);
++ AuDbg("%s\n", p);
++ file = au_xino_create(sb, p, /*silent*/0);
++ if (!IS_ERR(file))
++ au_xino_brid_set(sb, br->br_id);
++ }
++ __putname(page);
++ } else {
++ file = au_xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0);
++ if (IS_ERR(file))
++ goto out;
++ h_sb = file->f_dentry->d_sb;
++ if (unlikely(au_test_fs_bad_xino(h_sb))) {
++ AuErr("xino doesn't support %s(%s)\n",
++ AUFS_XINO_DEFPATH, au_sbtype(h_sb));
++ fput(file);
++ file = ERR_PTR(-EINVAL);
++ }
++ if (!IS_ERR(file))
++ au_xino_brid_set(sb, -1);
++ }
++
++ out:
++ return file;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_xino_path(struct seq_file *seq, struct file *file)
++{
++ int err;
++
++ err = au_seq_path(seq, &file->f_path);
++ if (unlikely(err < 0))
++ goto out;
++
++ err = 0;
++#define Deleted "\\040(deleted)"
++ seq->count -= sizeof(Deleted) - 1;
++ AuDebugOn(memcmp(seq->buf + seq->count, Deleted,
++ sizeof(Deleted) - 1));
++#undef Deleted
++
++ out:
++ return err;
++}
+diff -Nur linux-2.6.31.5.orig/fs/Kconfig linux-2.6.31.5/fs/Kconfig
+--- linux-2.6.31.5.orig/fs/Kconfig 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/Kconfig 2009-11-15 22:02:37.000000000 +0100
+@@ -187,6 +187,7 @@
+ source "fs/ufs/Kconfig"
+ source "fs/exofs/Kconfig"
+ source "fs/nilfs2/Kconfig"
++source "fs/aufs/Kconfig"
+
+ endif # MISC_FILESYSTEMS
+
+diff -Nur linux-2.6.31.5.orig/fs/Makefile linux-2.6.31.5/fs/Makefile
+--- linux-2.6.31.5.orig/fs/Makefile 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/Makefile 2009-11-15 22:02:37.000000000 +0100
+@@ -85,6 +85,7 @@
+ obj-$(CONFIG_HFS_FS) += hfs/
+ obj-$(CONFIG_ECRYPT_FS) += ecryptfs/
+ obj-$(CONFIG_VXFS_FS) += freevxfs/
++obj-$(CONFIG_AUFS_FS) += aufs/
+ obj-$(CONFIG_NFS_FS) += nfs/
+ obj-$(CONFIG_EXPORTFS) += exportfs/
+ obj-$(CONFIG_NFSD) += nfsd/
+diff -Nur linux-2.6.31.5.orig/fs/namei.c linux-2.6.31.5/fs/namei.c
+--- linux-2.6.31.5.orig/fs/namei.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/namei.c 2009-11-15 22:02:37.000000000 +0100
+@@ -337,6 +337,7 @@
+
+ return 0;
+ }
++EXPORT_SYMBOL(deny_write_access);
+
+ /**
+ * path_get - get a reference to a path
+@@ -1219,7 +1220,7 @@
+ * needs parent already locked. Doesn't follow mounts.
+ * SMP-safe.
+ */
+-static struct dentry *lookup_hash(struct nameidata *nd)
++struct dentry *lookup_hash(struct nameidata *nd)
+ {
+ int err;
+
+@@ -1228,8 +1229,9 @@
+ return ERR_PTR(err);
+ return __lookup_hash(&nd->last, nd->path.dentry, nd);
+ }
++EXPORT_SYMBOL(lookup_hash);
+
+-static int __lookup_one_len(const char *name, struct qstr *this,
++int __lookup_one_len(const char *name, struct qstr *this,
+ struct dentry *base, int len)
+ {
+ unsigned long hash;
+@@ -1250,6 +1252,7 @@
+ this->hash = end_name_hash(hash);
+ return 0;
+ }
++EXPORT_SYMBOL(__lookup_one_len);
+
+ /**
+ * lookup_one_len - filesystem helper to lookup single pathname component
+diff -Nur linux-2.6.31.5.orig/fs/namespace.c linux-2.6.31.5/fs/namespace.c
+--- linux-2.6.31.5.orig/fs/namespace.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/namespace.c 2009-11-15 22:02:37.000000000 +0100
+@@ -39,6 +39,7 @@
+
+ /* spinlock for vfsmount related operations, inplace of dcache_lock */
+ __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
++EXPORT_SYMBOL(vfsmount_lock);
+
+ static int event;
+ static DEFINE_IDA(mnt_id_ida);
+diff -Nur linux-2.6.31.5.orig/fs/open.c linux-2.6.31.5/fs/open.c
+--- linux-2.6.31.5.orig/fs/open.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/open.c 2009-11-15 22:02:37.000000000 +0100
+@@ -221,6 +221,7 @@
+ mutex_unlock(&dentry->d_inode->i_mutex);
+ return err;
+ }
++EXPORT_SYMBOL(do_truncate);
+
+ static long do_sys_truncate(const char __user *pathname, loff_t length)
+ {
+diff -Nur linux-2.6.31.5.orig/fs/splice.c linux-2.6.31.5/fs/splice.c
+--- linux-2.6.31.5.orig/fs/splice.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/fs/splice.c 2009-11-15 22:02:37.000000000 +0100
+@@ -1057,8 +1057,8 @@
+ /*
+ * Attempt to initiate a splice from pipe to file.
+ */
+-static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+- loff_t *ppos, size_t len, unsigned int flags)
++long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
++ loff_t *ppos, size_t len, unsigned int flags)
+ {
+ ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
+ loff_t *, size_t, unsigned int);
+@@ -1080,13 +1080,14 @@
+
+ return splice_write(pipe, out, ppos, len, flags);
+ }
++EXPORT_SYMBOL(do_splice_from);
+
+ /*
+ * Attempt to initiate a splice from a file to a pipe.
+ */
+-static long do_splice_to(struct file *in, loff_t *ppos,
+- struct pipe_inode_info *pipe, size_t len,
+- unsigned int flags)
++long do_splice_to(struct file *in, loff_t *ppos,
++ struct pipe_inode_info *pipe, size_t len,
++ unsigned int flags)
+ {
+ ssize_t (*splice_read)(struct file *, loff_t *,
+ struct pipe_inode_info *, size_t, unsigned int);
+@@ -1105,6 +1106,7 @@
+
+ return splice_read(in, ppos, pipe, len, flags);
+ }
++EXPORT_SYMBOL(do_splice_to);
+
+ /**
+ * splice_direct_to_actor - splices data directly between two non-pipes
+diff -Nur linux-2.6.31.5.orig/include/linux/aufs_type.h linux-2.6.31.5/include/linux/aufs_type.h
+--- linux-2.6.31.5.orig/include/linux/aufs_type.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.31.5/include/linux/aufs_type.h 2009-11-15 22:02:37.000000000 +0100
+@@ -0,0 +1,109 @@
++/*
++ * Copyright (C) 2005-2009 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ */
++
++#ifndef __AUFS_TYPE_H__
++#define __AUFS_TYPE_H__
++
++#include <linux/ioctl.h>
++
++#define AUFS_VERSION "2-standalone.tree-30-20090803"
++
++/* todo? move this to linux-2.6.19/include/magic.h */
++#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_BRANCH_MAX_127
++/* some environments treat 'char' as 'unsigned char' by default */
++typedef signed char aufs_bindex_t;
++#define AUFS_BRANCH_MAX 127
++#else
++typedef short aufs_bindex_t;
++#ifdef CONFIG_AUFS_BRANCH_MAX_511
++#define AUFS_BRANCH_MAX 511
++#elif defined(CONFIG_AUFS_BRANCH_MAX_1023)
++#define AUFS_BRANCH_MAX 1023
++#elif defined(CONFIG_AUFS_BRANCH_MAX_32767)
++#define AUFS_BRANCH_MAX 32767
++#endif
++#endif
++
++#ifdef __KERNEL__
++#ifndef AUFS_BRANCH_MAX
++#error unknown CONFIG_AUFS_BRANCH_MAX value
++#endif
++#endif /* __KERNEL__ */
++
++/* ---------------------------------------------------------------------- */
++
++#define AUFS_NAME "aufs"
++#define AUFS_FSTYPE AUFS_NAME
++
++#define AUFS_ROOT_INO 2
++#define AUFS_FIRST_INO 11
++
++#define AUFS_WH_PFX ".wh."
++#define AUFS_WH_PFX_LEN ((int)sizeof(AUFS_WH_PFX) - 1)
++#define AUFS_XINO_FNAME "." AUFS_NAME ".xino"
++#define AUFS_XINO_DEFPATH "/tmp/" AUFS_XINO_FNAME
++#define AUFS_XINO_TRUNC_INIT 64 /* blocks */
++#define AUFS_XINO_TRUNC_STEP 4 /* blocks */
++#define AUFS_DIRWH_DEF 3
++#define AUFS_RDCACHE_DEF 10 /* seconds */
++#define AUFS_RDBLK_DEF 512 /* bytes */
++#define AUFS_RDHASH_DEF 32
++#define AUFS_WKQ_NAME AUFS_NAME "d"
++#define AUFS_NWKQ_DEF 4
++#define AUFS_MFS_SECOND_DEF 30 /* seconds */
++#define AUFS_PLINK_WARN 100 /* number of plinks */
++
++#define AUFS_DIROPQ_NAME AUFS_WH_PFX ".opq" /* whiteouted doubly */
++#define AUFS_WH_DIROPQ AUFS_WH_PFX AUFS_DIROPQ_NAME
++
++#define AUFS_BASE_NAME AUFS_WH_PFX AUFS_NAME
++#define AUFS_PLINKDIR_NAME AUFS_WH_PFX "plnk"
++#define AUFS_ORPHDIR_NAME AUFS_WH_PFX "orph"
++
++/* doubly whiteouted */
++#define AUFS_WH_BASE AUFS_WH_PFX AUFS_BASE_NAME
++#define AUFS_WH_PLINKDIR AUFS_WH_PFX AUFS_PLINKDIR_NAME
++#define AUFS_WH_ORPHDIR AUFS_WH_PFX AUFS_ORPHDIR_NAME
++
++/* branch permission */
++#define AUFS_BRPERM_RW "rw"
++#define AUFS_BRPERM_RO "ro"
++#define AUFS_BRPERM_RR "rr"
++#define AUFS_BRPERM_WH "wh"
++#define AUFS_BRPERM_NLWH "nolwh"
++#define AUFS_BRPERM_ROWH AUFS_BRPERM_RO "+" AUFS_BRPERM_WH
++#define AUFS_BRPERM_RRWH AUFS_BRPERM_RR "+" AUFS_BRPERM_WH
++#define AUFS_BRPERM_RWNLWH AUFS_BRPERM_RW "+" AUFS_BRPERM_NLWH
++
++/* ---------------------------------------------------------------------- */
++
++/* ioctl */
++enum {
++ AuCtl_PLINK_MAINT,
++ AuCtl_PLINK_CLEAN
++};
++
++#define AuCtlType 'A'
++#define AUFS_CTL_PLINK_MAINT _IO(AuCtlType, AuCtl_PLINK_MAINT)
++#define AUFS_CTL_PLINK_CLEAN _IO(AuCtlType, AuCtl_PLINK_CLEAN)
++
++#endif /* __AUFS_TYPE_H__ */
+diff -Nur linux-2.6.31.5.orig/include/linux/Kbuild linux-2.6.31.5/include/linux/Kbuild
+--- linux-2.6.31.5.orig/include/linux/Kbuild 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/include/linux/Kbuild 2009-11-15 22:02:38.000000000 +0100
+@@ -34,6 +34,7 @@
+ header-y += atmsap.h
+ header-y += atmsvc.h
+ header-y += atm_zatm.h
++header-y += aufs_type.h
+ header-y += auto_fs4.h
+ header-y += ax25.h
+ header-y += b1lli.h
+diff -Nur linux-2.6.31.5.orig/include/linux/namei.h linux-2.6.31.5/include/linux/namei.h
+--- linux-2.6.31.5.orig/include/linux/namei.h 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/include/linux/namei.h 2009-11-15 22:02:38.000000000 +0100
+@@ -75,6 +75,9 @@
+ extern struct file *nameidata_to_filp(struct nameidata *nd, int flags);
+ extern void release_open_intent(struct nameidata *);
+
++extern struct dentry *lookup_hash(struct nameidata *nd);
++extern int __lookup_one_len(const char *name, struct qstr *this,
++ struct dentry *base, int len);
+ extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
+ extern struct dentry *lookup_one_noperm(const char *, struct dentry *);
+
+diff -Nur linux-2.6.31.5.orig/include/linux/splice.h linux-2.6.31.5/include/linux/splice.h
+--- linux-2.6.31.5.orig/include/linux/splice.h 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/include/linux/splice.h 2009-11-15 22:02:38.000000000 +0100
+@@ -82,4 +82,10 @@
+ extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
+ splice_direct_actor *);
+
++extern long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
++ loff_t *ppos, size_t len, unsigned int flags);
++extern long do_splice_to(struct file *in, loff_t *ppos,
++ struct pipe_inode_info *pipe, size_t len,
++ unsigned int flags);
++
+ #endif
+diff -Nur linux-2.6.31.5.orig/security/device_cgroup.c linux-2.6.31.5/security/device_cgroup.c
+--- linux-2.6.31.5.orig/security/device_cgroup.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/security/device_cgroup.c 2009-11-15 22:02:38.000000000 +0100
+@@ -513,6 +513,7 @@
+
+ return -EPERM;
+ }
++EXPORT_SYMBOL(devcgroup_inode_permission);
+
+ int devcgroup_inode_mknod(int mode, dev_t dev)
+ {
+diff -Nur linux-2.6.31.5.orig/security/security.c linux-2.6.31.5/security/security.c
+--- linux-2.6.31.5.orig/security/security.c 2009-10-23 00:57:56.000000000 +0200
++++ linux-2.6.31.5/security/security.c 2009-11-15 22:02:38.000000000 +0100
+@@ -386,6 +386,7 @@
+ return 0;
+ return security_ops->path_mkdir(path, dentry, mode);
+ }
++EXPORT_SYMBOL(security_path_mkdir);
+
+ int security_path_rmdir(struct path *path, struct dentry *dentry)
+ {
+@@ -393,6 +394,7 @@
+ return 0;
+ return security_ops->path_rmdir(path, dentry);
+ }
++EXPORT_SYMBOL(security_path_rmdir);
+
+ int security_path_unlink(struct path *path, struct dentry *dentry)
+ {
+@@ -400,6 +402,7 @@
+ return 0;
+ return security_ops->path_unlink(path, dentry);
+ }
++EXPORT_SYMBOL(security_path_unlink);
+
+ int security_path_symlink(struct path *path, struct dentry *dentry,
+ const char *old_name)
+@@ -408,6 +411,7 @@
+ return 0;
+ return security_ops->path_symlink(path, dentry, old_name);
+ }
++EXPORT_SYMBOL(security_path_symlink);
+
+ int security_path_link(struct dentry *old_dentry, struct path *new_dir,
+ struct dentry *new_dentry)
+@@ -416,6 +420,7 @@
+ return 0;
+ return security_ops->path_link(old_dentry, new_dir, new_dentry);
+ }
++EXPORT_SYMBOL(security_path_link);
+
+ int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
+ struct path *new_dir, struct dentry *new_dentry)
+@@ -426,6 +431,7 @@
+ return security_ops->path_rename(old_dir, old_dentry, new_dir,
+ new_dentry);
+ }
++EXPORT_SYMBOL(security_path_rename);
+
+ int security_path_truncate(struct path *path, loff_t length,
+ unsigned int time_attrs)
+@@ -434,6 +440,7 @@
+ return 0;
+ return security_ops->path_truncate(path, length, time_attrs);
+ }
++EXPORT_SYMBOL(security_path_truncate);
+ #endif
+
+ int security_inode_create(struct inode *dir, struct dentry *dentry, int mode)
+@@ -505,6 +512,7 @@
+ return 0;
+ return security_ops->inode_readlink(dentry);
+ }
++EXPORT_SYMBOL(security_inode_readlink);
+
+ int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
+ {
+@@ -519,6 +527,7 @@
+ return 0;
+ return security_ops->inode_permission(inode, mask);
+ }
++EXPORT_SYMBOL(security_inode_permission);
+
+ int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
+ {
+@@ -619,6 +628,7 @@
+ {
+ return security_ops->file_permission(file, mask);
+ }
++EXPORT_SYMBOL(security_file_permission);
+
+ int security_file_alloc(struct file *file)
+ {
diff --git a/target/linux/patches/2.6.33/bsd-compatibility.patch b/target/linux/patches/2.6.33/bsd-compatibility.patch
new file mode 100644
index 000000000..624a845c0
--- /dev/null
+++ b/target/linux/patches/2.6.33/bsd-compatibility.patch
@@ -0,0 +1,2513 @@
+diff -Nur linux-2.6.32.orig/scripts/Makefile.lib linux-2.6.32/scripts/Makefile.lib
+--- linux-2.6.32.orig/scripts/Makefile.lib Thu Dec 3 04:50:57 2009
++++ linux-2.6.32/scripts/Makefile.lib Sat Dec 19 12:21:44 2009
+@@ -211,7 +211,12 @@
+ size_append = /bin/echo -ne $(shell \
+ dec_size=0; \
+ for F in $1; do \
+- fsize=$$(stat -c "%s" $$F); \
++ if stat --help >/dev/null 2>&1; then \
++ statcmd='stat -c %s'; \
++ else \
++ statcmd='stat -f %z'; \
++ fi; \
++ fsize=$$($$statcmd $$F); \
+ dec_size=$$(expr $$dec_size + $$fsize); \
+ done; \
+ printf "%08x" $$dec_size | \
+diff -Nur linux-2.6.32.orig/scripts/mod/mk_elfconfig.c linux-2.6.32/scripts/mod/mk_elfconfig.c
+--- linux-2.6.32.orig/scripts/mod/mk_elfconfig.c Thu Dec 3 04:50:57 2009
++++ linux-2.6.32/scripts/mod/mk_elfconfig.c Sat Dec 19 11:09:24 2009
+@@ -1,7 +1,18 @@
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+-#include <elf.h>
++
++#define EI_NIDENT (16)
++#define ELFMAG "\177ELF"
++
++#define SELFMAG 4
++#define EI_CLASS 4
++#define ELFCLASS32 1 /* 32-bit objects */
++#define ELFCLASS64 2 /* 64-bit objects */
++
++#define EI_DATA 5 /* Data encoding byte index */
++#define ELFDATA2LSB 1 /* 2's complement, little endian */
++#define ELFDATA2MSB 2 /* 2's complement, big endian */
+
+ int
+ main(int argc, char **argv)
+diff -Nur linux-2.6.32.orig/scripts/mod/modpost.h linux-2.6.32/scripts/mod/modpost.h
+--- linux-2.6.32.orig/scripts/mod/modpost.h Thu Dec 3 04:50:57 2009
++++ linux-2.6.32/scripts/mod/modpost.h Sat Dec 19 11:55:02 2009
+@@ -7,8 +7,2454 @@
+ #include <sys/mman.h>
+ #include <fcntl.h>
+ #include <unistd.h>
+-#include <elf.h>
+
++
++/* This file defines standard ELF types, structures, and macros.
++ Copyright (C) 1995-1999,2000,2001,2002,2003 Free Software Foundation, Inc.
++ This file is part of the GNU C Library.
++
++ The GNU C Library is free software; you can redistribute it and/or
++ modify it under the terms of the GNU Lesser General Public
++ License as published by the Free Software Foundation; either
++ version 2.1 of the License, or (at your option) any later version.
++
++ The GNU C Library is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ Lesser General Public License for more details.
++
++ You should have received a copy of the GNU Lesser General Public
++ License along with the GNU C Library; if not, write to the Free
++ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
++ 02111-1307 USA. */
++
++#ifndef _ELF_H
++#define _ELF_H 1
++
++__BEGIN_DECLS
++
++/* Standard ELF types. */
++
++#include <stdint.h>
++
++/* Type for a 16-bit quantity. */
++typedef uint16_t Elf32_Half;
++typedef uint16_t Elf64_Half;
++
++/* Types for signed and unsigned 32-bit quantities. */
++typedef uint32_t Elf32_Word;
++typedef int32_t Elf32_Sword;
++typedef uint32_t Elf64_Word;
++typedef int32_t Elf64_Sword;
++
++/* Types for signed and unsigned 64-bit quantities. */
++typedef uint64_t Elf32_Xword;
++typedef int64_t Elf32_Sxword;
++typedef uint64_t Elf64_Xword;
++typedef int64_t Elf64_Sxword;
++
++/* Type of addresses. */
++typedef uint32_t Elf32_Addr;
++typedef uint64_t Elf64_Addr;
++
++/* Type of file offsets. */
++typedef uint32_t Elf32_Off;
++typedef uint64_t Elf64_Off;
++
++/* Type for section indices, which are 16-bit quantities. */
++typedef uint16_t Elf32_Section;
++typedef uint16_t Elf64_Section;
++
++/* Type for version symbol information. */
++typedef Elf32_Half Elf32_Versym;
++typedef Elf64_Half Elf64_Versym;
++
++
++/* The ELF file header. This appears at the start of every ELF file. */
++
++#define EI_NIDENT (16)
++
++typedef struct
++{
++ unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
++ Elf32_Half e_type; /* Object file type */
++ Elf32_Half e_machine; /* Architecture */
++ Elf32_Word e_version; /* Object file version */
++ Elf32_Addr e_entry; /* Entry point virtual address */
++ Elf32_Off e_phoff; /* Program header table file offset */
++ Elf32_Off e_shoff; /* Section header table file offset */
++ Elf32_Word e_flags; /* Processor-specific flags */
++ Elf32_Half e_ehsize; /* ELF header size in bytes */
++ Elf32_Half e_phentsize; /* Program header table entry size */
++ Elf32_Half e_phnum; /* Program header table entry count */
++ Elf32_Half e_shentsize; /* Section header table entry size */
++ Elf32_Half e_shnum; /* Section header table entry count */
++ Elf32_Half e_shstrndx; /* Section header string table index */
++} Elf32_Ehdr;
++
++typedef struct
++{
++ unsigned char e_ident[EI_NIDENT]; /* Magic number and other info */
++ Elf64_Half e_type; /* Object file type */
++ Elf64_Half e_machine; /* Architecture */
++ Elf64_Word e_version; /* Object file version */
++ Elf64_Addr e_entry; /* Entry point virtual address */
++ Elf64_Off e_phoff; /* Program header table file offset */
++ Elf64_Off e_shoff; /* Section header table file offset */
++ Elf64_Word e_flags; /* Processor-specific flags */
++ Elf64_Half e_ehsize; /* ELF header size in bytes */
++ Elf64_Half e_phentsize; /* Program header table entry size */
++ Elf64_Half e_phnum; /* Program header table entry count */
++ Elf64_Half e_shentsize; /* Section header table entry size */
++ Elf64_Half e_shnum; /* Section header table entry count */
++ Elf64_Half e_shstrndx; /* Section header string table index */
++} Elf64_Ehdr;
++
++/* Fields in the e_ident array. The EI_* macros are indices into the
++ array. The macros under each EI_* macro are the values the byte
++ may have. */
++
++#define EI_MAG0 0 /* File identification byte 0 index */
++#define ELFMAG0 0x7f /* Magic number byte 0 */
++
++#define EI_MAG1 1 /* File identification byte 1 index */
++#define ELFMAG1 'E' /* Magic number byte 1 */
++
++#define EI_MAG2 2 /* File identification byte 2 index */
++#define ELFMAG2 'L' /* Magic number byte 2 */
++
++#define EI_MAG3 3 /* File identification byte 3 index */
++#define ELFMAG3 'F' /* Magic number byte 3 */
++
++/* Conglomeration of the identification bytes, for easy testing as a word. */
++#define ELFMAG "\177ELF"
++#define SELFMAG 4
++
++#define EI_CLASS 4 /* File class byte index */
++#define ELFCLASSNONE 0 /* Invalid class */
++#define ELFCLASS32 1 /* 32-bit objects */
++#define ELFCLASS64 2 /* 64-bit objects */
++#define ELFCLASSNUM 3
++
++#define EI_DATA 5 /* Data encoding byte index */
++#define ELFDATANONE 0 /* Invalid data encoding */
++#define ELFDATA2LSB 1 /* 2's complement, little endian */
++#define ELFDATA2MSB 2 /* 2's complement, big endian */
++#define ELFDATANUM 3
++
++#define EI_VERSION 6 /* File version byte index */
++ /* Value must be EV_CURRENT */
++
++#define EI_OSABI 7 /* OS ABI identification */
++#define ELFOSABI_NONE 0 /* UNIX System V ABI */
++#define ELFOSABI_SYSV 0 /* Alias. */
++#define ELFOSABI_HPUX 1 /* HP-UX */
++#define ELFOSABI_NETBSD 2 /* NetBSD. */
++#define ELFOSABI_LINUX 3 /* Linux. */
++#define ELFOSABI_SOLARIS 6 /* Sun Solaris. */
++#define ELFOSABI_AIX 7 /* IBM AIX. */
++#define ELFOSABI_IRIX 8 /* SGI Irix. */
++#define ELFOSABI_FREEBSD 9 /* FreeBSD. */
++#define ELFOSABI_TRU64 10 /* Compaq TRU64 UNIX. */
++#define ELFOSABI_MODESTO 11 /* Novell Modesto. */
++#define ELFOSABI_OPENBSD 12 /* OpenBSD. */
++#define ELFOSABI_ARM 97 /* ARM */
++#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
++
++#define EI_ABIVERSION 8 /* ABI version */
++
++#define EI_PAD 9 /* Byte index of padding bytes */
++
++/* Legal values for e_type (object file type). */
++
++#define ET_NONE 0 /* No file type */
++#define ET_REL 1 /* Relocatable file */
++#define ET_EXEC 2 /* Executable file */
++#define ET_DYN 3 /* Shared object file */
++#define ET_CORE 4 /* Core file */
++#define ET_NUM 5 /* Number of defined types */
++#define ET_LOOS 0xfe00 /* OS-specific range start */
++#define ET_HIOS 0xfeff /* OS-specific range end */
++#define ET_LOPROC 0xff00 /* Processor-specific range start */
++#define ET_HIPROC 0xffff /* Processor-specific range end */
++
++/* Legal values for e_machine (architecture). */
++
++#define EM_NONE 0 /* No machine */
++#define EM_M32 1 /* AT&T WE 32100 */
++#define EM_SPARC 2 /* SUN SPARC */
++#define EM_386 3 /* Intel 80386 */
++#define EM_68K 4 /* Motorola m68k family */
++#define EM_88K 5 /* Motorola m88k family */
++#define EM_860 7 /* Intel 80860 */
++#define EM_MIPS 8 /* MIPS R3000 big-endian */
++#define EM_S370 9 /* IBM System/370 */
++#define EM_MIPS_RS3_LE 10 /* MIPS R3000 little-endian */
++
++#define EM_PARISC 15 /* HPPA */
++#define EM_VPP500 17 /* Fujitsu VPP500 */
++#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
++#define EM_960 19 /* Intel 80960 */
++#define EM_PPC 20 /* PowerPC */
++#define EM_PPC64 21 /* PowerPC 64-bit */
++#define EM_S390 22 /* IBM S390 */
++
++#define EM_V800 36 /* NEC V800 series */
++#define EM_FR20 37 /* Fujitsu FR20 */
++#define EM_RH32 38 /* TRW RH-32 */
++#define EM_RCE 39 /* Motorola RCE */
++#define EM_ARM 40 /* ARM */
++#define EM_FAKE_ALPHA 41 /* Digital Alpha */
++#define EM_SH 42 /* Hitachi SH */
++#define EM_SPARCV9 43 /* SPARC v9 64-bit */
++#define EM_TRICORE 44 /* Siemens Tricore */
++#define EM_ARC 45 /* Argonaut RISC Core */
++#define EM_H8_300 46 /* Hitachi H8/300 */
++#define EM_H8_300H 47 /* Hitachi H8/300H */
++#define EM_H8S 48 /* Hitachi H8S */
++#define EM_H8_500 49 /* Hitachi H8/500 */
++#define EM_IA_64 50 /* Intel Merced */
++#define EM_MIPS_X 51 /* Stanford MIPS-X */
++#define EM_COLDFIRE 52 /* Motorola Coldfire */
++#define EM_68HC12 53 /* Motorola M68HC12 */
++#define EM_MMA 54 /* Fujitsu MMA Multimedia Accelerator*/
++#define EM_PCP 55 /* Siemens PCP */
++#define EM_NCPU 56 /* Sony nCPU embeeded RISC */
++#define EM_NDR1 57 /* Denso NDR1 microprocessor */
++#define EM_STARCORE 58 /* Motorola Start*Core processor */
++#define EM_ME16 59 /* Toyota ME16 processor */
++#define EM_ST100 60 /* STMicroelectronic ST100 processor */
++#define EM_TINYJ 61 /* Advanced Logic Corp. Tinyj emb.fam*/
++#define EM_X86_64 62 /* AMD x86-64 architecture */
++#define EM_PDSP 63 /* Sony DSP Processor */
++
++#define EM_FX66 66 /* Siemens FX66 microcontroller */
++#define EM_ST9PLUS 67 /* STMicroelectronics ST9+ 8/16 mc */
++#define EM_ST7 68 /* STmicroelectronics ST7 8 bit mc */
++#define EM_68HC16 69 /* Motorola MC68HC16 microcontroller */
++#define EM_68HC11 70 /* Motorola MC68HC11 microcontroller */
++#define EM_68HC08 71 /* Motorola MC68HC08 microcontroller */
++#define EM_68HC05 72 /* Motorola MC68HC05 microcontroller */
++#define EM_SVX 73 /* Silicon Graphics SVx */
++#define EM_ST19 74 /* STMicroelectronics ST19 8 bit mc */
++#define EM_VAX 75 /* Digital VAX */
++#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
++#define EM_JAVELIN 77 /* Infineon Technologies 32-bit embedded processor */
++#define EM_FIREPATH 78 /* Element 14 64-bit DSP Processor */
++#define EM_ZSP 79 /* LSI Logic 16-bit DSP Processor */
++#define EM_MMIX 80 /* Donald Knuth's educational 64-bit processor */
++#define EM_HUANY 81 /* Harvard University machine-independent object files */
++#define EM_PRISM 82 /* SiTera Prism */
++#define EM_AVR 83 /* Atmel AVR 8-bit microcontroller */
++#define EM_FR30 84 /* Fujitsu FR30 */
++#define EM_D10V 85 /* Mitsubishi D10V */
++#define EM_D30V 86 /* Mitsubishi D30V */
++#define EM_V850 87 /* NEC v850 */
++#define EM_M32R 88 /* Mitsubishi M32R */
++#define EM_MN10300 89 /* Matsushita MN10300 */
++#define EM_MN10200 90 /* Matsushita MN10200 */
++#define EM_PJ 91 /* picoJava */
++#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */
++#define EM_ARC_A5 93 /* ARC Cores Tangent-A5 */
++#define EM_XTENSA 94 /* Tensilica Xtensa Architecture */
++#define EM_NUM 95
++
++/* If it is necessary to assign new unofficial EM_* values, please
++ pick large random numbers (0x8523, 0xa7f2, etc.) to minimize the
++ chances of collision with official or non-GNU unofficial values. */
++
++#define EM_ALPHA 0x9026
++
++/* Legal values for e_version (version). */
++
++#define EV_NONE 0 /* Invalid ELF version */
++#define EV_CURRENT 1 /* Current version */
++#define EV_NUM 2
++
++/* Section header. */
++
++typedef struct
++{
++ Elf32_Word sh_name; /* Section name (string tbl index) */
++ Elf32_Word sh_type; /* Section type */
++ Elf32_Word sh_flags; /* Section flags */
++ Elf32_Addr sh_addr; /* Section virtual addr at execution */
++ Elf32_Off sh_offset; /* Section file offset */
++ Elf32_Word sh_size; /* Section size in bytes */
++ Elf32_Word sh_link; /* Link to another section */
++ Elf32_Word sh_info; /* Additional section information */
++ Elf32_Word sh_addralign; /* Section alignment */
++ Elf32_Word sh_entsize; /* Entry size if section holds table */
++} Elf32_Shdr;
++
++typedef struct
++{
++ Elf64_Word sh_name; /* Section name (string tbl index) */
++ Elf64_Word sh_type; /* Section type */
++ Elf64_Xword sh_flags; /* Section flags */
++ Elf64_Addr sh_addr; /* Section virtual addr at execution */
++ Elf64_Off sh_offset; /* Section file offset */
++ Elf64_Xword sh_size; /* Section size in bytes */
++ Elf64_Word sh_link; /* Link to another section */
++ Elf64_Word sh_info; /* Additional section information */
++ Elf64_Xword sh_addralign; /* Section alignment */
++ Elf64_Xword sh_entsize; /* Entry size if section holds table */
++} Elf64_Shdr;
++
++/* Special section indices. */
++
++#define SHN_UNDEF 0 /* Undefined section */
++#define SHN_LORESERVE 0xff00 /* Start of reserved indices */
++#define SHN_LOPROC 0xff00 /* Start of processor-specific */
++#define SHN_HIPROC 0xff1f /* End of processor-specific */
++#define SHN_LOOS 0xff20 /* Start of OS-specific */
++#define SHN_HIOS 0xff3f /* End of OS-specific */
++#define SHN_ABS 0xfff1 /* Associated symbol is absolute */
++#define SHN_COMMON 0xfff2 /* Associated symbol is common */
++#define SHN_XINDEX 0xffff /* Index is in extra table. */
++#define SHN_HIRESERVE 0xffff /* End of reserved indices */
++
++/* Legal values for sh_type (section type). */
++
++#define SHT_NULL 0 /* Section header table entry unused */
++#define SHT_PROGBITS 1 /* Program data */
++#define SHT_SYMTAB 2 /* Symbol table */
++#define SHT_STRTAB 3 /* String table */
++#define SHT_RELA 4 /* Relocation entries with addends */
++#define SHT_HASH 5 /* Symbol hash table */
++#define SHT_DYNAMIC 6 /* Dynamic linking information */
++#define SHT_NOTE 7 /* Notes */
++#define SHT_NOBITS 8 /* Program space with no data (bss) */
++#define SHT_REL 9 /* Relocation entries, no addends */
++#define SHT_SHLIB 10 /* Reserved */
++#define SHT_DYNSYM 11 /* Dynamic linker symbol table */
++#define SHT_INIT_ARRAY 14 /* Array of constructors */
++#define SHT_FINI_ARRAY 15 /* Array of destructors */
++#define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */
++#define SHT_GROUP 17 /* Section group */
++#define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */
++#define SHT_NUM 19 /* Number of defined types. */
++#define SHT_LOOS 0x60000000 /* Start OS-specific */
++#define SHT_GNU_LIBLIST 0x6ffffff7 /* Prelink library list */
++#define SHT_CHECKSUM 0x6ffffff8 /* Checksum for DSO content. */
++#define SHT_LOSUNW 0x6ffffffa /* Sun-specific low bound. */
++#define SHT_SUNW_move 0x6ffffffa
++#define SHT_SUNW_COMDAT 0x6ffffffb
++#define SHT_SUNW_syminfo 0x6ffffffc
++#define SHT_GNU_verdef 0x6ffffffd /* Version definition section. */
++#define SHT_GNU_verneed 0x6ffffffe /* Version needs section. */
++#define SHT_GNU_versym 0x6fffffff /* Version symbol table. */
++#define SHT_HISUNW 0x6fffffff /* Sun-specific high bound. */
++#define SHT_HIOS 0x6fffffff /* End OS-specific type */
++#define SHT_LOPROC 0x70000000 /* Start of processor-specific */
++#define SHT_HIPROC 0x7fffffff /* End of processor-specific */
++#define SHT_LOUSER 0x80000000 /* Start of application-specific */
++#define SHT_HIUSER 0x8fffffff /* End of application-specific */
++
++/* Legal values for sh_flags (section flags). */
++
++#define SHF_WRITE (1 << 0) /* Writable */
++#define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
++#define SHF_EXECINSTR (1 << 2) /* Executable */
++#define SHF_MERGE (1 << 4) /* Might be merged */
++#define SHF_STRINGS (1 << 5) /* Contains nul-terminated strings */
++#define SHF_INFO_LINK (1 << 6) /* `sh_info' contains SHT index */
++#define SHF_LINK_ORDER (1 << 7) /* Preserve order after combining */
++#define SHF_OS_NONCONFORMING (1 << 8) /* Non-standard OS specific handling
++ required */
++#define SHF_GROUP (1 << 9) /* Section is member of a group. */
++#define SHF_TLS (1 << 10) /* Section hold thread-local data. */
++#define SHF_MASKOS 0x0ff00000 /* OS-specific. */
++#define SHF_MASKPROC 0xf0000000 /* Processor-specific */
++
++/* Section group handling. */
++#define GRP_COMDAT 0x1 /* Mark group as COMDAT. */
++
++/* Symbol table entry. */
++
++typedef struct
++{
++ Elf32_Word st_name; /* Symbol name (string tbl index) */
++ Elf32_Addr st_value; /* Symbol value */
++ Elf32_Word st_size; /* Symbol size */
++ unsigned char st_info; /* Symbol type and binding */
++ unsigned char st_other; /* Symbol visibility */
++ Elf32_Section st_shndx; /* Section index */
++} Elf32_Sym;
++
++typedef struct
++{
++ Elf64_Word st_name; /* Symbol name (string tbl index) */
++ unsigned char st_info; /* Symbol type and binding */
++ unsigned char st_other; /* Symbol visibility */
++ Elf64_Section st_shndx; /* Section index */
++ Elf64_Addr st_value; /* Symbol value */
++ Elf64_Xword st_size; /* Symbol size */
++} Elf64_Sym;
++
++/* The syminfo section if available contains additional information about
++ every dynamic symbol. */
++
++typedef struct
++{
++ Elf32_Half si_boundto; /* Direct bindings, symbol bound to */
++ Elf32_Half si_flags; /* Per symbol flags */
++} Elf32_Syminfo;
++
++typedef struct
++{
++ Elf64_Half si_boundto; /* Direct bindings, symbol bound to */
++ Elf64_Half si_flags; /* Per symbol flags */
++} Elf64_Syminfo;
++
++/* Possible values for si_boundto. */
++#define SYMINFO_BT_SELF 0xffff /* Symbol bound to self */
++#define SYMINFO_BT_PARENT 0xfffe /* Symbol bound to parent */
++#define SYMINFO_BT_LOWRESERVE 0xff00 /* Beginning of reserved entries */
++
++/* Possible bitmasks for si_flags. */
++#define SYMINFO_FLG_DIRECT 0x0001 /* Direct bound symbol */
++#define SYMINFO_FLG_PASSTHRU 0x0002 /* Pass-thru symbol for translator */
++#define SYMINFO_FLG_COPY 0x0004 /* Symbol is a copy-reloc */
++#define SYMINFO_FLG_LAZYLOAD 0x0008 /* Symbol bound to object to be lazy
++ loaded */
++/* Syminfo version values. */
++#define SYMINFO_NONE 0
++#define SYMINFO_CURRENT 1
++#define SYMINFO_NUM 2
++
++
++/* How to extract and insert information held in the st_info field. */
++
++#define ELF32_ST_BIND(val) (((unsigned char) (val)) >> 4)
++#define ELF32_ST_TYPE(val) ((val) & 0xf)
++#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
++
++/* Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field. */
++#define ELF64_ST_BIND(val) ELF32_ST_BIND (val)
++#define ELF64_ST_TYPE(val) ELF32_ST_TYPE (val)
++#define ELF64_ST_INFO(bind, type) ELF32_ST_INFO ((bind), (type))
++
++/* Legal values for ST_BIND subfield of st_info (symbol binding). */
++
++#define STB_LOCAL 0 /* Local symbol */
++#define STB_GLOBAL 1 /* Global symbol */
++#define STB_WEAK 2 /* Weak symbol */
++#define STB_NUM 3 /* Number of defined types. */
++#define STB_LOOS 10 /* Start of OS-specific */
++#define STB_HIOS 12 /* End of OS-specific */
++#define STB_LOPROC 13 /* Start of processor-specific */
++#define STB_HIPROC 15 /* End of processor-specific */
++
++/* Legal values for ST_TYPE subfield of st_info (symbol type). */
++
++#define STT_NOTYPE 0 /* Symbol type is unspecified */
++#define STT_OBJECT 1 /* Symbol is a data object */
++#define STT_FUNC 2 /* Symbol is a code object */
++#define STT_SECTION 3 /* Symbol associated with a section */
++#define STT_FILE 4 /* Symbol's name is file name */
++#define STT_COMMON 5 /* Symbol is a common data object */
++#define STT_TLS 6 /* Symbol is thread-local data object*/
++#define STT_NUM 7 /* Number of defined types. */
++#define STT_LOOS 10 /* Start of OS-specific */
++#define STT_HIOS 12 /* End of OS-specific */
++#define STT_LOPROC 13 /* Start of processor-specific */
++#define STT_HIPROC 15 /* End of processor-specific */
++
++
++/* Symbol table indices are found in the hash buckets and chain table
++ of a symbol hash table section. This special index value indicates
++ the end of a chain, meaning no further symbols are found in that bucket. */
++
++#define STN_UNDEF 0 /* End of a chain. */
++
++
++/* How to extract and insert information held in the st_other field. */
++
++#define ELF32_ST_VISIBILITY(o) ((o) & 0x03)
++
++/* For ELF64 the definitions are the same. */
++#define ELF64_ST_VISIBILITY(o) ELF32_ST_VISIBILITY (o)
++
++/* Symbol visibility specification encoded in the st_other field. */
++#define STV_DEFAULT 0 /* Default symbol visibility rules */
++#define STV_INTERNAL 1 /* Processor specific hidden class */
++#define STV_HIDDEN 2 /* Sym unavailable in other modules */
++#define STV_PROTECTED 3 /* Not preemptible, not exported */
++
++
++/* Relocation table entry without addend (in section of type SHT_REL). */
++
++typedef struct
++{
++ Elf32_Addr r_offset; /* Address */
++ Elf32_Word r_info; /* Relocation type and symbol index */
++} Elf32_Rel;
++
++/* I have seen two different definitions of the Elf64_Rel and
++ Elf64_Rela structures, so we'll leave them out until Novell (or
++ whoever) gets their act together. */
++/* The following, at least, is used on Sparc v9, MIPS, and Alpha. */
++
++typedef struct
++{
++ Elf64_Addr r_offset; /* Address */
++ Elf64_Xword r_info; /* Relocation type and symbol index */
++} Elf64_Rel;
++
++/* Relocation table entry with addend (in section of type SHT_RELA). */
++
++typedef struct
++{
++ Elf32_Addr r_offset; /* Address */
++ Elf32_Word r_info; /* Relocation type and symbol index */
++ Elf32_Sword r_addend; /* Addend */
++} Elf32_Rela;
++
++typedef struct
++{
++ Elf64_Addr r_offset; /* Address */
++ Elf64_Xword r_info; /* Relocation type and symbol index */
++ Elf64_Sxword r_addend; /* Addend */
++} Elf64_Rela;
++
++/* How to extract and insert information held in the r_info field. */
++
++#define ELF32_R_SYM(val) ((val) >> 8)
++#define ELF32_R_TYPE(val) ((val) & 0xff)
++#define ELF32_R_INFO(sym, type) (((sym) << 8) + ((type) & 0xff))
++
++#define ELF64_R_SYM(i) ((i) >> 32)
++#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
++#define ELF64_R_INFO(sym,type) ((((Elf64_Xword) (sym)) << 32) + (type))
++
++/* Program segment header. */
++
++typedef struct
++{
++ Elf32_Word p_type; /* Segment type */
++ Elf32_Off p_offset; /* Segment file offset */
++ Elf32_Addr p_vaddr; /* Segment virtual address */
++ Elf32_Addr p_paddr; /* Segment physical address */
++ Elf32_Word p_filesz; /* Segment size in file */
++ Elf32_Word p_memsz; /* Segment size in memory */
++ Elf32_Word p_flags; /* Segment flags */
++ Elf32_Word p_align; /* Segment alignment */
++} Elf32_Phdr;
++
++typedef struct
++{
++ Elf64_Word p_type; /* Segment type */
++ Elf64_Word p_flags; /* Segment flags */
++ Elf64_Off p_offset; /* Segment file offset */
++ Elf64_Addr p_vaddr; /* Segment virtual address */
++ Elf64_Addr p_paddr; /* Segment physical address */
++ Elf64_Xword p_filesz; /* Segment size in file */
++ Elf64_Xword p_memsz; /* Segment size in memory */
++ Elf64_Xword p_align; /* Segment alignment */
++} Elf64_Phdr;
++
++/* Legal values for p_type (segment type). */
++
++#define PT_NULL 0 /* Program header table entry unused */
++#define PT_LOAD 1 /* Loadable program segment */
++#define PT_DYNAMIC 2 /* Dynamic linking information */
++#define PT_INTERP 3 /* Program interpreter */
++#define PT_NOTE 4 /* Auxiliary information */
++#define PT_SHLIB 5 /* Reserved */
++#define PT_PHDR 6 /* Entry for header table itself */
++#define PT_TLS 7 /* Thread-local storage segment */
++#define PT_NUM 8 /* Number of defined types */
++#define PT_LOOS 0x60000000 /* Start of OS-specific */
++#define PT_GNU_EH_FRAME 0x6474e550 /* GCC .eh_frame_hdr segment */
++#define PT_GNU_STACK 0x6474e551 /* Indicates stack executability */
++#define PT_LOSUNW 0x6ffffffa
++#define PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */
++#define PT_SUNWSTACK 0x6ffffffb /* Stack segment */
++#define PT_HISUNW 0x6fffffff
++#define PT_HIOS 0x6fffffff /* End of OS-specific */
++#define PT_LOPROC 0x70000000 /* Start of processor-specific */
++#define PT_HIPROC 0x7fffffff /* End of processor-specific */
++
++/* Legal values for p_flags (segment flags). */
++
++#define PF_X (1 << 0) /* Segment is executable */
++#define PF_W (1 << 1) /* Segment is writable */
++#define PF_R (1 << 2) /* Segment is readable */
++#define PF_MASKOS 0x0ff00000 /* OS-specific */
++#define PF_MASKPROC 0xf0000000 /* Processor-specific */
++
++/* Legal values for note segment descriptor types for core files. */
++
++#define NT_PRSTATUS 1 /* Contains copy of prstatus struct */
++#define NT_FPREGSET 2 /* Contains copy of fpregset struct */
++#define NT_PRPSINFO 3 /* Contains copy of prpsinfo struct */
++#define NT_PRXREG 4 /* Contains copy of prxregset struct */
++#define NT_TASKSTRUCT 4 /* Contains copy of task structure */
++#define NT_PLATFORM 5 /* String from sysinfo(SI_PLATFORM) */
++#define NT_AUXV 6 /* Contains copy of auxv array */
++#define NT_GWINDOWS 7 /* Contains copy of gwindows struct */
++#define NT_ASRS 8 /* Contains copy of asrset struct */
++#define NT_PSTATUS 10 /* Contains copy of pstatus struct */
++#define NT_PSINFO 13 /* Contains copy of psinfo struct */
++#define NT_PRCRED 14 /* Contains copy of prcred struct */
++#define NT_UTSNAME 15 /* Contains copy of utsname struct */
++#define NT_LWPSTATUS 16 /* Contains copy of lwpstatus struct */
++#define NT_LWPSINFO 17 /* Contains copy of lwpinfo struct */
++#define NT_PRFPXREG 20 /* Contains copy of fprxregset struct*/
++
++/* Legal values for the note segment descriptor types for object files. */
++
++#define NT_VERSION 1 /* Contains a version string. */
++
++
++/* Dynamic section entry. */
++
++typedef struct
++{
++ Elf32_Sword d_tag; /* Dynamic entry type */
++ union
++ {
++ Elf32_Word d_val; /* Integer value */
++ Elf32_Addr d_ptr; /* Address value */
++ } d_un;
++} Elf32_Dyn;
++
++typedef struct
++{
++ Elf64_Sxword d_tag; /* Dynamic entry type */
++ union
++ {
++ Elf64_Xword d_val; /* Integer value */
++ Elf64_Addr d_ptr; /* Address value */
++ } d_un;
++} Elf64_Dyn;
++
++/* Legal values for d_tag (dynamic entry type). */
++
++#define DT_NULL 0 /* Marks end of dynamic section */
++#define DT_NEEDED 1 /* Name of needed library */
++#define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */
++#define DT_PLTGOT 3 /* Processor defined value */
++#define DT_HASH 4 /* Address of symbol hash table */
++#define DT_STRTAB 5 /* Address of string table */
++#define DT_SYMTAB 6 /* Address of symbol table */
++#define DT_RELA 7 /* Address of Rela relocs */
++#define DT_RELASZ 8 /* Total size of Rela relocs */
++#define DT_RELAENT 9 /* Size of one Rela reloc */
++#define DT_STRSZ 10 /* Size of string table */
++#define DT_SYMENT 11 /* Size of one symbol table entry */
++#define DT_INIT 12 /* Address of init function */
++#define DT_FINI 13 /* Address of termination function */
++#define DT_SONAME 14 /* Name of shared object */
++#define DT_RPATH 15 /* Library search path (deprecated) */
++#define DT_SYMBOLIC 16 /* Start symbol search here */
++#define DT_REL 17 /* Address of Rel relocs */
++#define DT_RELSZ 18 /* Total size of Rel relocs */
++#define DT_RELENT 19 /* Size of one Rel reloc */
++#define DT_PLTREL 20 /* Type of reloc in PLT */
++#define DT_DEBUG 21 /* For debugging; unspecified */
++#define DT_TEXTREL 22 /* Reloc might modify .text */
++#define DT_JMPREL 23 /* Address of PLT relocs */
++#define DT_BIND_NOW 24 /* Process relocations of object */
++#define DT_INIT_ARRAY 25 /* Array with addresses of init fct */
++#define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */
++#define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */
++#define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */
++#define DT_RUNPATH 29 /* Library search path */
++#define DT_FLAGS 30 /* Flags for the object being loaded */
++#define DT_ENCODING 32 /* Start of encoded range */
++#define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/
++#define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */
++#define DT_NUM 34 /* Number used */
++#define DT_LOOS 0x6000000d /* Start of OS-specific */
++#define DT_HIOS 0x6ffff000 /* End of OS-specific */
++#define DT_LOPROC 0x70000000 /* Start of processor-specific */
++#define DT_HIPROC 0x7fffffff /* End of processor-specific */
++#define DT_PROCNUM DT_MIPS_NUM /* Most used by any processor */
++
++/* DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
++ Dyn.d_un.d_val field of the Elf*_Dyn structure. This follows Sun's
++ approach. */
++#define DT_VALRNGLO 0x6ffffd00
++#define DT_GNU_PRELINKED 0x6ffffdf5 /* Prelinking timestamp */
++#define DT_GNU_CONFLICTSZ 0x6ffffdf6 /* Size of conflict section */
++#define DT_GNU_LIBLISTSZ 0x6ffffdf7 /* Size of library list */
++#define DT_CHECKSUM 0x6ffffdf8
++#define DT_PLTPADSZ 0x6ffffdf9
++#define DT_MOVEENT 0x6ffffdfa
++#define DT_MOVESZ 0x6ffffdfb
++#define DT_FEATURE_1 0x6ffffdfc /* Feature selection (DTF_*). */
++#define DT_POSFLAG_1 0x6ffffdfd /* Flags for DT_* entries, effecting
++ the following DT_* entry. */
++#define DT_SYMINSZ 0x6ffffdfe /* Size of syminfo table (in bytes) */
++#define DT_SYMINENT 0x6ffffdff /* Entry size of syminfo */
++#define DT_VALRNGHI 0x6ffffdff
++#define DT_VALTAGIDX(tag) (DT_VALRNGHI - (tag)) /* Reverse order! */
++#define DT_VALNUM 12
++
++/* DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
++ Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
++
++ If any adjustment is made to the ELF object after it has been
++ built these entries will need to be adjusted. */
++#define DT_ADDRRNGLO 0x6ffffe00
++#define DT_GNU_CONFLICT 0x6ffffef8 /* Start of conflict section */
++#define DT_GNU_LIBLIST 0x6ffffef9 /* Library list */
++#define DT_CONFIG 0x6ffffefa /* Configuration information. */
++#define DT_DEPAUDIT 0x6ffffefb /* Dependency auditing. */
++#define DT_AUDIT 0x6ffffefc /* Object auditing. */
++#define DT_PLTPAD 0x6ffffefd /* PLT padding. */
++#define DT_MOVETAB 0x6ffffefe /* Move table. */
++#define DT_SYMINFO 0x6ffffeff /* Syminfo table. */
++#define DT_ADDRRNGHI 0x6ffffeff
++#define DT_ADDRTAGIDX(tag) (DT_ADDRRNGHI - (tag)) /* Reverse order! */
++#define DT_ADDRNUM 10
++
++/* The versioning entry types. The next are defined as part of the
++ GNU extension. */
++#define DT_VERSYM 0x6ffffff0
++
++#define DT_RELACOUNT 0x6ffffff9
++#define DT_RELCOUNT 0x6ffffffa
++
++/* These were chosen by Sun. */
++#define DT_FLAGS_1 0x6ffffffb /* State flags, see DF_1_* below. */
++#define DT_VERDEF 0x6ffffffc /* Address of version definition
++ table */
++#define DT_VERDEFNUM 0x6ffffffd /* Number of version definitions */
++#define DT_VERNEED 0x6ffffffe /* Address of table with needed
++ versions */
++#define DT_VERNEEDNUM 0x6fffffff /* Number of needed versions */
++#define DT_VERSIONTAGIDX(tag) (DT_VERNEEDNUM - (tag)) /* Reverse order! */
++#define DT_VERSIONTAGNUM 16
++
++/* Sun added these machine-independent extensions in the "processor-specific"
++ range. Be compatible. */
++#define DT_AUXILIARY 0x7ffffffd /* Shared object to load before self */
++#define DT_FILTER 0x7fffffff /* Shared object to get values from */
++#define DT_EXTRATAGIDX(tag) ((Elf32_Word)-((Elf32_Sword) (tag) <<1>>1)-1)
++#define DT_EXTRANUM 3
++
++/* Values of `d_un.d_val' in the DT_FLAGS entry. */
++#define DF_ORIGIN 0x00000001 /* Object may use DF_ORIGIN */
++#define DF_SYMBOLIC 0x00000002 /* Symbol resolutions starts here */
++#define DF_TEXTREL 0x00000004 /* Object contains text relocations */
++#define DF_BIND_NOW 0x00000008 /* No lazy binding for this object */
++#define DF_STATIC_TLS 0x00000010 /* Module uses the static TLS model */
++
++/* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
++ entry in the dynamic section. */
++#define DF_1_NOW 0x00000001 /* Set RTLD_NOW for this object. */
++#define DF_1_GLOBAL 0x00000002 /* Set RTLD_GLOBAL for this object. */
++#define DF_1_GROUP 0x00000004 /* Set RTLD_GROUP for this object. */
++#define DF_1_NODELETE 0x00000008 /* Set RTLD_NODELETE for this object.*/
++#define DF_1_LOADFLTR 0x00000010 /* Trigger filtee loading at runtime.*/
++#define DF_1_INITFIRST 0x00000020 /* Set RTLD_INITFIRST for this object*/
++#define DF_1_NOOPEN 0x00000040 /* Set RTLD_NOOPEN for this object. */
++#define DF_1_ORIGIN 0x00000080 /* $ORIGIN must be handled. */
++#define DF_1_DIRECT 0x00000100 /* Direct binding enabled. */
++#define DF_1_TRANS 0x00000200
++#define DF_1_INTERPOSE 0x00000400 /* Object is used to interpose. */
++#define DF_1_NODEFLIB 0x00000800 /* Ignore default lib search path. */
++#define DF_1_NODUMP 0x00001000 /* Object can't be dldump'ed. */
++#define DF_1_CONFALT 0x00002000 /* Configuration alternative created.*/
++#define DF_1_ENDFILTEE 0x00004000 /* Filtee terminates filters search. */
++#define DF_1_DISPRELDNE 0x00008000 /* Disp reloc applied at build time. */
++#define DF_1_DISPRELPND 0x00010000 /* Disp reloc applied at run-time. */
++
++/* Flags for the feature selection in DT_FEATURE_1. */
++#define DTF_1_PARINIT 0x00000001
++#define DTF_1_CONFEXP 0x00000002
++
++/* Flags in the DT_POSFLAG_1 entry effecting only the next DT_* entry. */
++#define DF_P1_LAZYLOAD 0x00000001 /* Lazyload following object. */
++#define DF_P1_GROUPPERM 0x00000002 /* Symbols from next object are not
++ generally available. */
++
++/* Version definition sections. */
++
++typedef struct
++{
++ Elf32_Half vd_version; /* Version revision */
++ Elf32_Half vd_flags; /* Version information */
++ Elf32_Half vd_ndx; /* Version Index */
++ Elf32_Half vd_cnt; /* Number of associated aux entries */
++ Elf32_Word vd_hash; /* Version name hash value */
++ Elf32_Word vd_aux; /* Offset in bytes to verdaux array */
++ Elf32_Word vd_next; /* Offset in bytes to next verdef
++ entry */
++} Elf32_Verdef;
++
++typedef struct
++{
++ Elf64_Half vd_version; /* Version revision */
++ Elf64_Half vd_flags; /* Version information */
++ Elf64_Half vd_ndx; /* Version Index */
++ Elf64_Half vd_cnt; /* Number of associated aux entries */
++ Elf64_Word vd_hash; /* Version name hash value */
++ Elf64_Word vd_aux; /* Offset in bytes to verdaux array */
++ Elf64_Word vd_next; /* Offset in bytes to next verdef
++ entry */
++} Elf64_Verdef;
++
++
++/* Legal values for vd_version (version revision). */
++#define VER_DEF_NONE 0 /* No version */
++#define VER_DEF_CURRENT 1 /* Current version */
++#define VER_DEF_NUM 2 /* Given version number */
++
++/* Legal values for vd_flags (version information flags). */
++#define VER_FLG_BASE 0x1 /* Version definition of file itself */
++#define VER_FLG_WEAK 0x2 /* Weak version identifier */
++
++/* Versym symbol index values. */
++#define VER_NDX_LOCAL 0 /* Symbol is local. */
++#define VER_NDX_GLOBAL 1 /* Symbol is global. */
++#define VER_NDX_LORESERVE 0xff00 /* Beginning of reserved entries. */
++#define VER_NDX_ELIMINATE 0xff01 /* Symbol is to be eliminated. */
++
++/* Auxialiary version information. */
++
++typedef struct
++{
++ Elf32_Word vda_name; /* Version or dependency names */
++ Elf32_Word vda_next; /* Offset in bytes to next verdaux
++ entry */
++} Elf32_Verdaux;
++
++typedef struct
++{
++ Elf64_Word vda_name; /* Version or dependency names */
++ Elf64_Word vda_next; /* Offset in bytes to next verdaux
++ entry */
++} Elf64_Verdaux;
++
++
++/* Version dependency section. */
++
++typedef struct
++{
++ Elf32_Half vn_version; /* Version of structure */
++ Elf32_Half vn_cnt; /* Number of associated aux entries */
++ Elf32_Word vn_file; /* Offset of filename for this
++ dependency */
++ Elf32_Word vn_aux; /* Offset in bytes to vernaux array */
++ Elf32_Word vn_next; /* Offset in bytes to next verneed
++ entry */
++} Elf32_Verneed;
++
++typedef struct
++{
++ Elf64_Half vn_version; /* Version of structure */
++ Elf64_Half vn_cnt; /* Number of associated aux entries */
++ Elf64_Word vn_file; /* Offset of filename for this
++ dependency */
++ Elf64_Word vn_aux; /* Offset in bytes to vernaux array */
++ Elf64_Word vn_next; /* Offset in bytes to next verneed
++ entry */
++} Elf64_Verneed;
++
++
++/* Legal values for vn_version (version revision). */
++#define VER_NEED_NONE 0 /* No version */
++#define VER_NEED_CURRENT 1 /* Current version */
++#define VER_NEED_NUM 2 /* Given version number */
++
++/* Auxiliary needed version information. */
++
++typedef struct
++{
++ Elf32_Word vna_hash; /* Hash value of dependency name */
++ Elf32_Half vna_flags; /* Dependency specific information */
++ Elf32_Half vna_other; /* Unused */
++ Elf32_Word vna_name; /* Dependency name string offset */
++ Elf32_Word vna_next; /* Offset in bytes to next vernaux
++ entry */
++} Elf32_Vernaux;
++
++typedef struct
++{
++ Elf64_Word vna_hash; /* Hash value of dependency name */
++ Elf64_Half vna_flags; /* Dependency specific information */
++ Elf64_Half vna_other; /* Unused */
++ Elf64_Word vna_name; /* Dependency name string offset */
++ Elf64_Word vna_next; /* Offset in bytes to next vernaux
++ entry */
++} Elf64_Vernaux;
++
++
++/* Legal values for vna_flags. */
++#define VER_FLG_WEAK 0x2 /* Weak version identifier */
++
++
++/* Auxiliary vector. */
++
++/* This vector is normally only used by the program interpreter. The
++ usual definition in an ABI supplement uses the name auxv_t. The
++ vector is not usually defined in a standard <elf.h> file, but it
++ can't hurt. We rename it to avoid conflicts. The sizes of these
++ types are an arrangement between the exec server and the program
++ interpreter, so we don't fully specify them here. */
++
++typedef struct
++{
++ int a_type; /* Entry type */
++ union
++ {
++ long int a_val; /* Integer value */
++ void *a_ptr; /* Pointer value */
++ void (*a_fcn) (void); /* Function pointer value */
++ } a_un;
++} Elf32_auxv_t;
++
++typedef struct
++{
++ long int a_type; /* Entry type */
++ union
++ {
++ long int a_val; /* Integer value */
++ void *a_ptr; /* Pointer value */
++ void (*a_fcn) (void); /* Function pointer value */
++ } a_un;
++} Elf64_auxv_t;
++
++/* Legal values for a_type (entry type). */
++
++#define AT_NULL 0 /* End of vector */
++#define AT_IGNORE 1 /* Entry should be ignored */
++#define AT_EXECFD 2 /* File descriptor of program */
++#define AT_PHDR 3 /* Program headers for program */
++#define AT_PHENT 4 /* Size of program header entry */
++#define AT_PHNUM 5 /* Number of program headers */
++#define AT_PAGESZ 6 /* System page size */
++#define AT_BASE 7 /* Base address of interpreter */
++#define AT_FLAGS 8 /* Flags */
++#define AT_ENTRY 9 /* Entry point of program */
++#define AT_NOTELF 10 /* Program is not ELF */
++#define AT_UID 11 /* Real uid */
++#define AT_EUID 12 /* Effective uid */
++#define AT_GID 13 /* Real gid */
++#define AT_EGID 14 /* Effective gid */
++#define AT_CLKTCK 17 /* Frequency of times() */
++
++/* Some more special a_type values describing the hardware. */
++#define AT_PLATFORM 15 /* String identifying platform. */
++#define AT_HWCAP 16 /* Machine dependent hints about
++ processor capabilities. */
++
++/* This entry gives some information about the FPU initialization
++ performed by the kernel. */
++#define AT_FPUCW 18 /* Used FPU control word. */
++
++/* Cache block sizes. */
++#define AT_DCACHEBSIZE 19 /* Data cache block size. */
++#define AT_ICACHEBSIZE 20 /* Instruction cache block size. */
++#define AT_UCACHEBSIZE 21 /* Unified cache block size. */
++
++/* A special ignored value for PPC, used by the kernel to control the
++ interpretation of the AUXV. Must be > 16. */
++#define AT_IGNOREPPC 22 /* Entry should be ignored. */
++
++#define AT_SECURE 23 /* Boolean, was exec setuid-like? */
++
++/* Pointer to the global system page used for system calls and other
++ nice things. */
++#define AT_SYSINFO 32
++#define AT_SYSINFO_EHDR 33
++
++
++/* Note section contents. Each entry in the note section begins with
++ a header of a fixed form. */
++
++typedef struct
++{
++ Elf32_Word n_namesz; /* Length of the note's name. */
++ Elf32_Word n_descsz; /* Length of the note's descriptor. */
++ Elf32_Word n_type; /* Type of the note. */
++} Elf32_Nhdr;
++
++typedef struct
++{
++ Elf64_Word n_namesz; /* Length of the note's name. */
++ Elf64_Word n_descsz; /* Length of the note's descriptor. */
++ Elf64_Word n_type; /* Type of the note. */
++} Elf64_Nhdr;
++
++/* Known names of notes. */
++
++/* Solaris entries in the note section have this name. */
++#define ELF_NOTE_SOLARIS "SUNW Solaris"
++
++/* Note entries for GNU systems have this name. */
++#define ELF_NOTE_GNU "GNU"
++
++
++/* Defined types of notes for Solaris. */
++
++/* Value of descriptor (one word) is desired pagesize for the binary. */
++#define ELF_NOTE_PAGESIZE_HINT 1
++
++
++/* Defined note types for GNU systems. */
++
++/* ABI information. The descriptor consists of words:
++ word 0: OS descriptor
++ word 1: major version of the ABI
++ word 2: minor version of the ABI
++ word 3: subminor version of the ABI
++*/
++#define ELF_NOTE_ABI 1
++
++/* Known OSes. These value can appear in word 0 of an ELF_NOTE_ABI
++ note section entry. */
++#define ELF_NOTE_OS_LINUX 0
++#define ELF_NOTE_OS_GNU 1
++#define ELF_NOTE_OS_SOLARIS2 2
++#define ELF_NOTE_OS_FREEBSD 3
++
++
++/* Move records. */
++typedef struct
++{
++ Elf32_Xword m_value; /* Symbol value. */
++ Elf32_Word m_info; /* Size and index. */
++ Elf32_Word m_poffset; /* Symbol offset. */
++ Elf32_Half m_repeat; /* Repeat count. */
++ Elf32_Half m_stride; /* Stride info. */
++} Elf32_Move;
++
++typedef struct
++{
++ Elf64_Xword m_value; /* Symbol value. */
++ Elf64_Xword m_info; /* Size and index. */
++ Elf64_Xword m_poffset; /* Symbol offset. */
++ Elf64_Half m_repeat; /* Repeat count. */
++ Elf64_Half m_stride; /* Stride info. */
++} Elf64_Move;
++
++/* Macro to construct move records. */
++#define ELF32_M_SYM(info) ((info) >> 8)
++#define ELF32_M_SIZE(info) ((unsigned char) (info))
++#define ELF32_M_INFO(sym, size) (((sym) << 8) + (unsigned char) (size))
++
++#define ELF64_M_SYM(info) ELF32_M_SYM (info)
++#define ELF64_M_SIZE(info) ELF32_M_SIZE (info)
++#define ELF64_M_INFO(sym, size) ELF32_M_INFO (sym, size)
++
++
++/* Motorola 68k specific definitions. */
++
++/* Values for Elf32_Ehdr.e_flags. */
++#define EF_CPU32 0x00810000
++
++/* m68k relocs. */
++
++#define R_68K_NONE 0 /* No reloc */
++#define R_68K_32 1 /* Direct 32 bit */
++#define R_68K_16 2 /* Direct 16 bit */
++#define R_68K_8 3 /* Direct 8 bit */
++#define R_68K_PC32 4 /* PC relative 32 bit */
++#define R_68K_PC16 5 /* PC relative 16 bit */
++#define R_68K_PC8 6 /* PC relative 8 bit */
++#define R_68K_GOT32 7 /* 32 bit PC relative GOT entry */
++#define R_68K_GOT16 8 /* 16 bit PC relative GOT entry */
++#define R_68K_GOT8 9 /* 8 bit PC relative GOT entry */
++#define R_68K_GOT32O 10 /* 32 bit GOT offset */
++#define R_68K_GOT16O 11 /* 16 bit GOT offset */
++#define R_68K_GOT8O 12 /* 8 bit GOT offset */
++#define R_68K_PLT32 13 /* 32 bit PC relative PLT address */
++#define R_68K_PLT16 14 /* 16 bit PC relative PLT address */
++#define R_68K_PLT8 15 /* 8 bit PC relative PLT address */
++#define R_68K_PLT32O 16 /* 32 bit PLT offset */
++#define R_68K_PLT16O 17 /* 16 bit PLT offset */
++#define R_68K_PLT8O 18 /* 8 bit PLT offset */
++#define R_68K_COPY 19 /* Copy symbol at runtime */
++#define R_68K_GLOB_DAT 20 /* Create GOT entry */
++#define R_68K_JMP_SLOT 21 /* Create PLT entry */
++#define R_68K_RELATIVE 22 /* Adjust by program base */
++/* Keep this the last entry. */
++#define R_68K_NUM 23
++
++/* Intel 80386 specific definitions. */
++
++/* i386 relocs. */
++
++#define R_386_NONE 0 /* No reloc */
++#define R_386_32 1 /* Direct 32 bit */
++#define R_386_PC32 2 /* PC relative 32 bit */
++#define R_386_GOT32 3 /* 32 bit GOT entry */
++#define R_386_PLT32 4 /* 32 bit PLT address */
++#define R_386_COPY 5 /* Copy symbol at runtime */
++#define R_386_GLOB_DAT 6 /* Create GOT entry */
++#define R_386_JMP_SLOT 7 /* Create PLT entry */
++#define R_386_RELATIVE 8 /* Adjust by program base */
++#define R_386_GOTOFF 9 /* 32 bit offset to GOT */
++#define R_386_GOTPC 10 /* 32 bit PC relative offset to GOT */
++#define R_386_32PLT 11
++#define R_386_TLS_TPOFF 14 /* Offset in static TLS block */
++#define R_386_TLS_IE 15 /* Address of GOT entry for static TLS
++ block offset */
++#define R_386_TLS_GOTIE 16 /* GOT entry for static TLS block
++ offset */
++#define R_386_TLS_LE 17 /* Offset relative to static TLS
++ block */
++#define R_386_TLS_GD 18 /* Direct 32 bit for GNU version of
++ general dynamic thread local data */
++#define R_386_TLS_LDM 19 /* Direct 32 bit for GNU version of
++ local dynamic thread local data
++ in LE code */
++#define R_386_16 20
++#define R_386_PC16 21
++#define R_386_8 22
++#define R_386_PC8 23
++#define R_386_TLS_GD_32 24 /* Direct 32 bit for general dynamic
++ thread local data */
++#define R_386_TLS_GD_PUSH 25 /* Tag for pushl in GD TLS code */
++#define R_386_TLS_GD_CALL 26 /* Relocation for call to
++ __tls_get_addr() */
++#define R_386_TLS_GD_POP 27 /* Tag for popl in GD TLS code */
++#define R_386_TLS_LDM_32 28 /* Direct 32 bit for local dynamic
++ thread local data in LE code */
++#define R_386_TLS_LDM_PUSH 29 /* Tag for pushl in LDM TLS code */
++#define R_386_TLS_LDM_CALL 30 /* Relocation for call to
++ __tls_get_addr() in LDM code */
++#define R_386_TLS_LDM_POP 31 /* Tag for popl in LDM TLS code */
++#define R_386_TLS_LDO_32 32 /* Offset relative to TLS block */
++#define R_386_TLS_IE_32 33 /* GOT entry for negated static TLS
++ block offset */
++#define R_386_TLS_LE_32 34 /* Negated offset relative to static
++ TLS block */
++#define R_386_TLS_DTPMOD32 35 /* ID of module containing symbol */
++#define R_386_TLS_DTPOFF32 36 /* Offset in TLS block */
++#define R_386_TLS_TPOFF32 37 /* Negated offset in static TLS block */
++/* Keep this the last entry. */
++#define R_386_NUM 38
++
++/* SUN SPARC specific definitions. */
++
++/* Legal values for ST_TYPE subfield of st_info (symbol type). */
++
++#define STT_REGISTER 13 /* Global register reserved to app. */
++
++/* Values for Elf64_Ehdr.e_flags. */
++
++#define EF_SPARCV9_MM 3
++#define EF_SPARCV9_TSO 0
++#define EF_SPARCV9_PSO 1
++#define EF_SPARCV9_RMO 2
++#define EF_SPARC_LEDATA 0x800000 /* little endian data */
++#define EF_SPARC_EXT_MASK 0xFFFF00
++#define EF_SPARC_32PLUS 0x000100 /* generic V8+ features */
++#define EF_SPARC_SUN_US1 0x000200 /* Sun UltraSPARC1 extensions */
++#define EF_SPARC_HAL_R1 0x000400 /* HAL R1 extensions */
++#define EF_SPARC_SUN_US3 0x000800 /* Sun UltraSPARCIII extensions */
++
++/* SPARC relocs. */
++
++#define R_SPARC_NONE 0 /* No reloc */
++#define R_SPARC_8 1 /* Direct 8 bit */
++#define R_SPARC_16 2 /* Direct 16 bit */
++#define R_SPARC_32 3 /* Direct 32 bit */
++#define R_SPARC_DISP8 4 /* PC relative 8 bit */
++#define R_SPARC_DISP16 5 /* PC relative 16 bit */
++#define R_SPARC_DISP32 6 /* PC relative 32 bit */
++#define R_SPARC_WDISP30 7 /* PC relative 30 bit shifted */
++#define R_SPARC_WDISP22 8 /* PC relative 22 bit shifted */
++#define R_SPARC_HI22 9 /* High 22 bit */
++#define R_SPARC_22 10 /* Direct 22 bit */
++#define R_SPARC_13 11 /* Direct 13 bit */
++#define R_SPARC_LO10 12 /* Truncated 10 bit */
++#define R_SPARC_GOT10 13 /* Truncated 10 bit GOT entry */
++#define R_SPARC_GOT13 14 /* 13 bit GOT entry */
++#define R_SPARC_GOT22 15 /* 22 bit GOT entry shifted */
++#define R_SPARC_PC10 16 /* PC relative 10 bit truncated */
++#define R_SPARC_PC22 17 /* PC relative 22 bit shifted */
++#define R_SPARC_WPLT30 18 /* 30 bit PC relative PLT address */
++#define R_SPARC_COPY 19 /* Copy symbol at runtime */
++#define R_SPARC_GLOB_DAT 20 /* Create GOT entry */
++#define R_SPARC_JMP_SLOT 21 /* Create PLT entry */
++#define R_SPARC_RELATIVE 22 /* Adjust by program base */
++#define R_SPARC_UA32 23 /* Direct 32 bit unaligned */
++
++/* Additional Sparc64 relocs. */
++
++#define R_SPARC_PLT32 24 /* Direct 32 bit ref to PLT entry */
++#define R_SPARC_HIPLT22 25 /* High 22 bit PLT entry */
++#define R_SPARC_LOPLT10 26 /* Truncated 10 bit PLT entry */
++#define R_SPARC_PCPLT32 27 /* PC rel 32 bit ref to PLT entry */
++#define R_SPARC_PCPLT22 28 /* PC rel high 22 bit PLT entry */
++#define R_SPARC_PCPLT10 29 /* PC rel trunc 10 bit PLT entry */
++#define R_SPARC_10 30 /* Direct 10 bit */
++#define R_SPARC_11 31 /* Direct 11 bit */
++#define R_SPARC_64 32 /* Direct 64 bit */
++#define R_SPARC_OLO10 33 /* 10bit with secondary 13bit addend */
++#define R_SPARC_HH22 34 /* Top 22 bits of direct 64 bit */
++#define R_SPARC_HM10 35 /* High middle 10 bits of ... */
++#define R_SPARC_LM22 36 /* Low middle 22 bits of ... */
++#define R_SPARC_PC_HH22 37 /* Top 22 bits of pc rel 64 bit */
++#define R_SPARC_PC_HM10 38 /* High middle 10 bit of ... */
++#define R_SPARC_PC_LM22 39 /* Low miggle 22 bits of ... */
++#define R_SPARC_WDISP16 40 /* PC relative 16 bit shifted */
++#define R_SPARC_WDISP19 41 /* PC relative 19 bit shifted */
++#define R_SPARC_7 43 /* Direct 7 bit */
++#define R_SPARC_5 44 /* Direct 5 bit */
++#define R_SPARC_6 45 /* Direct 6 bit */
++#define R_SPARC_DISP64 46 /* PC relative 64 bit */
++#define R_SPARC_PLT64 47 /* Direct 64 bit ref to PLT entry */
++#define R_SPARC_HIX22 48 /* High 22 bit complemented */
++#define R_SPARC_LOX10 49 /* Truncated 11 bit complemented */
++#define R_SPARC_H44 50 /* Direct high 12 of 44 bit */
++#define R_SPARC_M44 51 /* Direct mid 22 of 44 bit */
++#define R_SPARC_L44 52 /* Direct low 10 of 44 bit */
++#define R_SPARC_REGISTER 53 /* Global register usage */
++#define R_SPARC_UA64 54 /* Direct 64 bit unaligned */
++#define R_SPARC_UA16 55 /* Direct 16 bit unaligned */
++#define R_SPARC_TLS_GD_HI22 56
++#define R_SPARC_TLS_GD_LO10 57
++#define R_SPARC_TLS_GD_ADD 58
++#define R_SPARC_TLS_GD_CALL 59
++#define R_SPARC_TLS_LDM_HI22 60
++#define R_SPARC_TLS_LDM_LO10 61
++#define R_SPARC_TLS_LDM_ADD 62
++#define R_SPARC_TLS_LDM_CALL 63
++#define R_SPARC_TLS_LDO_HIX22 64
++#define R_SPARC_TLS_LDO_LOX10 65
++#define R_SPARC_TLS_LDO_ADD 66
++#define R_SPARC_TLS_IE_HI22 67
++#define R_SPARC_TLS_IE_LO10 68
++#define R_SPARC_TLS_IE_LD 69
++#define R_SPARC_TLS_IE_LDX 70
++#define R_SPARC_TLS_IE_ADD 71
++#define R_SPARC_TLS_LE_HIX22 72
++#define R_SPARC_TLS_LE_LOX10 73
++#define R_SPARC_TLS_DTPMOD32 74
++#define R_SPARC_TLS_DTPMOD64 75
++#define R_SPARC_TLS_DTPOFF32 76
++#define R_SPARC_TLS_DTPOFF64 77
++#define R_SPARC_TLS_TPOFF32 78
++#define R_SPARC_TLS_TPOFF64 79
++/* Keep this the last entry. */
++#define R_SPARC_NUM 80
++
++/* For Sparc64, legal values for d_tag of Elf64_Dyn. */
++
++#define DT_SPARC_REGISTER 0x70000001
++#define DT_SPARC_NUM 2
++
++/* Bits present in AT_HWCAP, primarily for Sparc32. */
++
++#define HWCAP_SPARC_FLUSH 1 /* The cpu supports flush insn. */
++#define HWCAP_SPARC_STBAR 2
++#define HWCAP_SPARC_SWAP 4
++#define HWCAP_SPARC_MULDIV 8
++#define HWCAP_SPARC_V9 16 /* The cpu is v9, so v8plus is ok. */
++#define HWCAP_SPARC_ULTRA3 32
++
++/* MIPS R3000 specific definitions. */
++
++/* Legal values for e_flags field of Elf32_Ehdr. */
++
++#define EF_MIPS_NOREORDER 1 /* A .noreorder directive was used */
++#define EF_MIPS_PIC 2 /* Contains PIC code */
++#define EF_MIPS_CPIC 4 /* Uses PIC calling sequence */
++#define EF_MIPS_XGOT 8
++#define EF_MIPS_64BIT_WHIRL 16
++#define EF_MIPS_ABI2 32
++#define EF_MIPS_ABI_ON32 64
++#define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */
++
++/* Legal values for MIPS architecture level. */
++
++#define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
++#define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
++#define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
++#define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
++#define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
++#define EF_MIPS_ARCH_32 0x60000000 /* MIPS32 code. */
++#define EF_MIPS_ARCH_64 0x70000000 /* MIPS64 code. */
++
++/* The following are non-official names and should not be used. */
++
++#define E_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
++#define E_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
++#define E_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
++#define E_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
++#define E_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
++#define E_MIPS_ARCH_32 0x60000000 /* MIPS32 code. */
++#define E_MIPS_ARCH_64 0x70000000 /* MIPS64 code. */
++
++/* Special section indices. */
++
++#define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */
++#define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */
++#define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */
++#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
++#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
++
++/* Legal values for sh_type field of Elf32_Shdr. */
++
++#define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */
++#define SHT_MIPS_MSYM 0x70000001
++#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */
++#define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */
++#define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */
++#define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information*/
++#define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */
++#define SHT_MIPS_PACKAGE 0x70000007
++#define SHT_MIPS_PACKSYM 0x70000008
++#define SHT_MIPS_RELD 0x70000009
++#define SHT_MIPS_IFACE 0x7000000b
++#define SHT_MIPS_CONTENT 0x7000000c
++#define SHT_MIPS_OPTIONS 0x7000000d /* Miscellaneous options. */
++#define SHT_MIPS_SHDR 0x70000010
++#define SHT_MIPS_FDESC 0x70000011
++#define SHT_MIPS_EXTSYM 0x70000012
++#define SHT_MIPS_DENSE 0x70000013
++#define SHT_MIPS_PDESC 0x70000014
++#define SHT_MIPS_LOCSYM 0x70000015
++#define SHT_MIPS_AUXSYM 0x70000016
++#define SHT_MIPS_OPTSYM 0x70000017
++#define SHT_MIPS_LOCSTR 0x70000018
++#define SHT_MIPS_LINE 0x70000019
++#define SHT_MIPS_RFDESC 0x7000001a
++#define SHT_MIPS_DELTASYM 0x7000001b
++#define SHT_MIPS_DELTAINST 0x7000001c
++#define SHT_MIPS_DELTACLASS 0x7000001d
++#define SHT_MIPS_DWARF 0x7000001e /* DWARF debugging information. */
++#define SHT_MIPS_DELTADECL 0x7000001f
++#define SHT_MIPS_SYMBOL_LIB 0x70000020
++#define SHT_MIPS_EVENTS 0x70000021 /* Event section. */
++#define SHT_MIPS_TRANSLATE 0x70000022
++#define SHT_MIPS_PIXIE 0x70000023
++#define SHT_MIPS_XLATE 0x70000024
++#define SHT_MIPS_XLATE_DEBUG 0x70000025
++#define SHT_MIPS_WHIRL 0x70000026
++#define SHT_MIPS_EH_REGION 0x70000027
++#define SHT_MIPS_XLATE_OLD 0x70000028
++#define SHT_MIPS_PDR_EXCEPTION 0x70000029
++
++/* Legal values for sh_flags field of Elf32_Shdr. */
++
++#define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */
++#define SHF_MIPS_MERGE 0x20000000
++#define SHF_MIPS_ADDR 0x40000000
++#define SHF_MIPS_STRINGS 0x80000000
++#define SHF_MIPS_NOSTRIP 0x08000000
++#define SHF_MIPS_LOCAL 0x04000000
++#define SHF_MIPS_NAMES 0x02000000
++#define SHF_MIPS_NODUPE 0x01000000
++
++
++/* Symbol tables. */
++
++/* MIPS specific values for `st_other'. */
++#define STO_MIPS_DEFAULT 0x0
++#define STO_MIPS_INTERNAL 0x1
++#define STO_MIPS_HIDDEN 0x2
++#define STO_MIPS_PROTECTED 0x3
++#define STO_MIPS_SC_ALIGN_UNUSED 0xff
++
++/* MIPS specific values for `st_info'. */
++#define STB_MIPS_SPLIT_COMMON 13
++
++/* Entries found in sections of type SHT_MIPS_GPTAB. */
++
++typedef union
++{
++ struct
++ {
++ Elf32_Word gt_current_g_value; /* -G value used for compilation */
++ Elf32_Word gt_unused; /* Not used */
++ } gt_header; /* First entry in section */
++ struct
++ {
++ Elf32_Word gt_g_value; /* If this value were used for -G */
++ Elf32_Word gt_bytes; /* This many bytes would be used */
++ } gt_entry; /* Subsequent entries in section */
++} Elf32_gptab;
++
++/* Entry found in sections of type SHT_MIPS_REGINFO. */
++
++typedef struct
++{
++ Elf32_Word ri_gprmask; /* General registers used */
++ Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */
++ Elf32_Sword ri_gp_value; /* $gp register value */
++} Elf32_RegInfo;
++
++/* Entries found in sections of type SHT_MIPS_OPTIONS. */
++
++typedef struct
++{
++ unsigned char kind; /* Determines interpretation of the
++ variable part of descriptor. */
++ unsigned char size; /* Size of descriptor, including header. */
++ Elf32_Section section; /* Section header index of section affected,
++ 0 for global options. */
++ Elf32_Word info; /* Kind-specific information. */
++} Elf_Options;
++
++/* Values for `kind' field in Elf_Options. */
++
++#define ODK_NULL 0 /* Undefined. */
++#define ODK_REGINFO 1 /* Register usage information. */
++#define ODK_EXCEPTIONS 2 /* Exception processing options. */
++#define ODK_PAD 3 /* Section padding options. */
++#define ODK_HWPATCH 4 /* Hardware workarounds performed */
++#define ODK_FILL 5 /* record the fill value used by the linker. */
++#define ODK_TAGS 6 /* reserve space for desktop tools to write. */
++#define ODK_HWAND 7 /* HW workarounds. 'AND' bits when merging. */
++#define ODK_HWOR 8 /* HW workarounds. 'OR' bits when merging. */
++
++/* Values for `info' in Elf_Options for ODK_EXCEPTIONS entries. */
++
++#define OEX_FPU_MIN 0x1f /* FPE's which MUST be enabled. */
++#define OEX_FPU_MAX 0x1f00 /* FPE's which MAY be enabled. */
++#define OEX_PAGE0 0x10000 /* page zero must be mapped. */
++#define OEX_SMM 0x20000 /* Force sequential memory mode? */
++#define OEX_FPDBUG 0x40000 /* Force floating point debug mode? */
++#define OEX_PRECISEFP OEX_FPDBUG
++#define OEX_DISMISS 0x80000 /* Dismiss invalid address faults? */
++
++#define OEX_FPU_INVAL 0x10
++#define OEX_FPU_DIV0 0x08
++#define OEX_FPU_OFLO 0x04
++#define OEX_FPU_UFLO 0x02
++#define OEX_FPU_INEX 0x01
++
++/* Masks for `info' in Elf_Options for an ODK_HWPATCH entry. */
++
++#define OHW_R4KEOP 0x1 /* R4000 end-of-page patch. */
++#define OHW_R8KPFETCH 0x2 /* may need R8000 prefetch patch. */
++#define OHW_R5KEOP 0x4 /* R5000 end-of-page patch. */
++#define OHW_R5KCVTL 0x8 /* R5000 cvt.[ds].l bug. clean=1. */
++
++#define OPAD_PREFIX 0x1
++#define OPAD_POSTFIX 0x2
++#define OPAD_SYMBOL 0x4
++
++/* Entry found in `.options' section. */
++
++typedef struct
++{
++ Elf32_Word hwp_flags1; /* Extra flags. */
++ Elf32_Word hwp_flags2; /* Extra flags. */
++} Elf_Options_Hw;
++
++/* Masks for `info' in ElfOptions for ODK_HWAND and ODK_HWOR entries. */
++
++#define OHWA0_R4KEOP_CHECKED 0x00000001
++#define OHWA1_R4KEOP_CLEAN 0x00000002
++
++/* MIPS relocs. */
++
++#define R_MIPS_NONE 0 /* No reloc */
++#define R_MIPS_16 1 /* Direct 16 bit */
++#define R_MIPS_32 2 /* Direct 32 bit */
++#define R_MIPS_REL32 3 /* PC relative 32 bit */
++#define R_MIPS_26 4 /* Direct 26 bit shifted */
++#define R_MIPS_HI16 5 /* High 16 bit */
++#define R_MIPS_LO16 6 /* Low 16 bit */
++#define R_MIPS_GPREL16 7 /* GP relative 16 bit */
++#define R_MIPS_LITERAL 8 /* 16 bit literal entry */
++#define R_MIPS_GOT16 9 /* 16 bit GOT entry */
++#define R_MIPS_PC16 10 /* PC relative 16 bit */
++#define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */
++#define R_MIPS_GPREL32 12 /* GP relative 32 bit */
++
++#define R_MIPS_SHIFT5 16
++#define R_MIPS_SHIFT6 17
++#define R_MIPS_64 18
++#define R_MIPS_GOT_DISP 19
++#define R_MIPS_GOT_PAGE 20
++#define R_MIPS_GOT_OFST 21
++#define R_MIPS_GOT_HI16 22
++#define R_MIPS_GOT_LO16 23
++#define R_MIPS_SUB 24
++#define R_MIPS_INSERT_A 25
++#define R_MIPS_INSERT_B 26
++#define R_MIPS_DELETE 27
++#define R_MIPS_HIGHER 28
++#define R_MIPS_HIGHEST 29
++#define R_MIPS_CALL_HI16 30
++#define R_MIPS_CALL_LO16 31
++#define R_MIPS_SCN_DISP 32
++#define R_MIPS_REL16 33
++#define R_MIPS_ADD_IMMEDIATE 34
++#define R_MIPS_PJUMP 35
++#define R_MIPS_RELGOT 36
++#define R_MIPS_JALR 37
++/* Keep this the last entry. */
++#define R_MIPS_NUM 38
++
++/* Legal values for p_type field of Elf32_Phdr. */
++
++#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
++#define PT_MIPS_RTPROC 0x70000001 /* Runtime procedure table. */
++#define PT_MIPS_OPTIONS 0x70000002
++
++/* Special program header types. */
++
++#define PF_MIPS_LOCAL 0x10000000
++
++/* Legal values for d_tag field of Elf32_Dyn. */
++
++#define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime linker interface version */
++#define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */
++#define DT_MIPS_ICHECKSUM 0x70000003 /* Checksum */
++#define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */
++#define DT_MIPS_FLAGS 0x70000005 /* Flags */
++#define DT_MIPS_BASE_ADDRESS 0x70000006 /* Base address */
++#define DT_MIPS_MSYM 0x70000007
++#define DT_MIPS_CONFLICT 0x70000008 /* Address of CONFLICT section */
++#define DT_MIPS_LIBLIST 0x70000009 /* Address of LIBLIST section */
++#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local GOT entries */
++#define DT_MIPS_CONFLICTNO 0x7000000b /* Number of CONFLICT entries */
++#define DT_MIPS_LIBLISTNO 0x70000010 /* Number of LIBLIST entries */
++#define DT_MIPS_SYMTABNO 0x70000011 /* Number of DYNSYM entries */
++#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */
++#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in DYNSYM */
++#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */
++#define DT_MIPS_RLD_MAP 0x70000016 /* Address of run time loader map. */
++#define DT_MIPS_DELTA_CLASS 0x70000017 /* Delta C++ class definition. */
++#define DT_MIPS_DELTA_CLASS_NO 0x70000018 /* Number of entries in
++ DT_MIPS_DELTA_CLASS. */
++#define DT_MIPS_DELTA_INSTANCE 0x70000019 /* Delta C++ class instances. */
++#define DT_MIPS_DELTA_INSTANCE_NO 0x7000001a /* Number of entries in
++ DT_MIPS_DELTA_INSTANCE. */
++#define DT_MIPS_DELTA_RELOC 0x7000001b /* Delta relocations. */
++#define DT_MIPS_DELTA_RELOC_NO 0x7000001c /* Number of entries in
++ DT_MIPS_DELTA_RELOC. */
++#define DT_MIPS_DELTA_SYM 0x7000001d /* Delta symbols that Delta
++ relocations refer to. */
++#define DT_MIPS_DELTA_SYM_NO 0x7000001e /* Number of entries in
++ DT_MIPS_DELTA_SYM. */
++#define DT_MIPS_DELTA_CLASSSYM 0x70000020 /* Delta symbols that hold the
++ class declaration. */
++#define DT_MIPS_DELTA_CLASSSYM_NO 0x70000021 /* Number of entries in
++ DT_MIPS_DELTA_CLASSSYM. */
++#define DT_MIPS_CXX_FLAGS 0x70000022 /* Flags indicating for C++ flavor. */
++#define DT_MIPS_PIXIE_INIT 0x70000023
++#define DT_MIPS_SYMBOL_LIB 0x70000024
++#define DT_MIPS_LOCALPAGE_GOTIDX 0x70000025
++#define DT_MIPS_LOCAL_GOTIDX 0x70000026
++#define DT_MIPS_HIDDEN_GOTIDX 0x70000027
++#define DT_MIPS_PROTECTED_GOTIDX 0x70000028
++#define DT_MIPS_OPTIONS 0x70000029 /* Address of .options. */
++#define DT_MIPS_INTERFACE 0x7000002a /* Address of .interface. */
++#define DT_MIPS_DYNSTR_ALIGN 0x7000002b
++#define DT_MIPS_INTERFACE_SIZE 0x7000002c /* Size of the .interface section. */
++#define DT_MIPS_RLD_TEXT_RESOLVE_ADDR 0x7000002d /* Address of rld_text_rsolve
++ function stored in GOT. */
++#define DT_MIPS_PERF_SUFFIX 0x7000002e /* Default suffix of dso to be added
++ by rld on dlopen() calls. */
++#define DT_MIPS_COMPACT_SIZE 0x7000002f /* (O32)Size of compact rel section. */
++#define DT_MIPS_GP_VALUE 0x70000030 /* GP value for aux GOTs. */
++#define DT_MIPS_AUX_DYNAMIC 0x70000031 /* Address of aux .dynamic. */
++#define DT_MIPS_NUM 0x32
++
++/* Legal values for DT_MIPS_FLAGS Elf32_Dyn entry. */
++
++#define RHF_NONE 0 /* No flags */
++#define RHF_QUICKSTART (1 << 0) /* Use quickstart */
++#define RHF_NOTPOT (1 << 1) /* Hash size not power of 2 */
++#define RHF_NO_LIBRARY_REPLACEMENT (1 << 2) /* Ignore LD_LIBRARY_PATH */
++#define RHF_NO_MOVE (1 << 3)
++#define RHF_SGI_ONLY (1 << 4)
++#define RHF_GUARANTEE_INIT (1 << 5)
++#define RHF_DELTA_C_PLUS_PLUS (1 << 6)
++#define RHF_GUARANTEE_START_INIT (1 << 7)
++#define RHF_PIXIE (1 << 8)
++#define RHF_DEFAULT_DELAY_LOAD (1 << 9)
++#define RHF_REQUICKSTART (1 << 10)
++#define RHF_REQUICKSTARTED (1 << 11)
++#define RHF_CORD (1 << 12)
++#define RHF_NO_UNRES_UNDEF (1 << 13)
++#define RHF_RLD_ORDER_SAFE (1 << 14)
++
++/* Entries found in sections of type SHT_MIPS_LIBLIST. */
++
++typedef struct
++{
++ Elf32_Word l_name; /* Name (string table index) */
++ Elf32_Word l_time_stamp; /* Timestamp */
++ Elf32_Word l_checksum; /* Checksum */
++ Elf32_Word l_version; /* Interface version */
++ Elf32_Word l_flags; /* Flags */
++} Elf32_Lib;
++
++typedef struct
++{
++ Elf64_Word l_name; /* Name (string table index) */
++ Elf64_Word l_time_stamp; /* Timestamp */
++ Elf64_Word l_checksum; /* Checksum */
++ Elf64_Word l_version; /* Interface version */
++ Elf64_Word l_flags; /* Flags */
++} Elf64_Lib;
++
++
++/* Legal values for l_flags. */
++
++#define LL_NONE 0
++#define LL_EXACT_MATCH (1 << 0) /* Require exact match */
++#define LL_IGNORE_INT_VER (1 << 1) /* Ignore interface version */
++#define LL_REQUIRE_MINOR (1 << 2)
++#define LL_EXPORTS (1 << 3)
++#define LL_DELAY_LOAD (1 << 4)
++#define LL_DELTA (1 << 5)
++
++/* Entries found in sections of type SHT_MIPS_CONFLICT. */
++
++typedef Elf32_Addr Elf32_Conflict;
++
++
++/* HPPA specific definitions. */
++
++/* Legal values for e_flags field of Elf32_Ehdr. */
++
++#define EF_PARISC_TRAPNIL 0x00010000 /* Trap nil pointer dereference. */
++#define EF_PARISC_EXT 0x00020000 /* Program uses arch. extensions. */
++#define EF_PARISC_LSB 0x00040000 /* Program expects little endian. */
++#define EF_PARISC_WIDE 0x00080000 /* Program expects wide mode. */
++#define EF_PARISC_NO_KABP 0x00100000 /* No kernel assisted branch
++ prediction. */
++#define EF_PARISC_LAZYSWAP 0x00400000 /* Allow lazy swapping. */
++#define EF_PARISC_ARCH 0x0000ffff /* Architecture version. */
++
++/* Defined values for `e_flags & EF_PARISC_ARCH' are: */
++
++#define EFA_PARISC_1_0 0x020b /* PA-RISC 1.0 big-endian. */
++#define EFA_PARISC_1_1 0x0210 /* PA-RISC 1.1 big-endian. */
++#define EFA_PARISC_2_0 0x0214 /* PA-RISC 2.0 big-endian. */
++
++/* Additional section indeces. */
++
++#define SHN_PARISC_ANSI_COMMON 0xff00 /* Section for tenatively declared
++ symbols in ANSI C. */
++#define SHN_PARISC_HUGE_COMMON 0xff01 /* Common blocks in huge model. */
++
++/* Legal values for sh_type field of Elf32_Shdr. */
++
++#define SHT_PARISC_EXT 0x70000000 /* Contains product specific ext. */
++#define SHT_PARISC_UNWIND 0x70000001 /* Unwind information. */
++#define SHT_PARISC_DOC 0x70000002 /* Debug info for optimized code. */
++
++/* Legal values for sh_flags field of Elf32_Shdr. */
++
++#define SHF_PARISC_SHORT 0x20000000 /* Section with short addressing. */
++#define SHF_PARISC_HUGE 0x40000000 /* Section far from gp. */
++#define SHF_PARISC_SBP 0x80000000 /* Static branch prediction code. */
++
++/* Legal values for ST_TYPE subfield of st_info (symbol type). */
++
++#define STT_PARISC_MILLICODE 13 /* Millicode function entry point. */
++
++#define STT_HP_OPAQUE (STT_LOOS + 0x1)
++#define STT_HP_STUB (STT_LOOS + 0x2)
++
++/* HPPA relocs. */
++
++#define R_PARISC_NONE 0 /* No reloc. */
++#define R_PARISC_DIR32 1 /* Direct 32-bit reference. */
++#define R_PARISC_DIR21L 2 /* Left 21 bits of eff. address. */
++#define R_PARISC_DIR17R 3 /* Right 17 bits of eff. address. */
++#define R_PARISC_DIR17F 4 /* 17 bits of eff. address. */
++#define R_PARISC_DIR14R 6 /* Right 14 bits of eff. address. */
++#define R_PARISC_PCREL32 9 /* 32-bit rel. address. */
++#define R_PARISC_PCREL21L 10 /* Left 21 bits of rel. address. */
++#define R_PARISC_PCREL17R 11 /* Right 17 bits of rel. address. */
++#define R_PARISC_PCREL17F 12 /* 17 bits of rel. address. */
++#define R_PARISC_PCREL14R 14 /* Right 14 bits of rel. address. */
++#define R_PARISC_DPREL21L 18 /* Left 21 bits of rel. address. */
++#define R_PARISC_DPREL14R 22 /* Right 14 bits of rel. address. */
++#define R_PARISC_GPREL21L 26 /* GP-relative, left 21 bits. */
++#define R_PARISC_GPREL14R 30 /* GP-relative, right 14 bits. */
++#define R_PARISC_LTOFF21L 34 /* LT-relative, left 21 bits. */
++#define R_PARISC_LTOFF14R 38 /* LT-relative, right 14 bits. */
++#define R_PARISC_SECREL32 41 /* 32 bits section rel. address. */
++#define R_PARISC_SEGBASE 48 /* No relocation, set segment base. */
++#define R_PARISC_SEGREL32 49 /* 32 bits segment rel. address. */
++#define R_PARISC_PLTOFF21L 50 /* PLT rel. address, left 21 bits. */
++#define R_PARISC_PLTOFF14R 54 /* PLT rel. address, right 14 bits. */
++#define R_PARISC_LTOFF_FPTR32 57 /* 32 bits LT-rel. function pointer. */
++#define R_PARISC_LTOFF_FPTR21L 58 /* LT-rel. fct ptr, left 21 bits. */
++#define R_PARISC_LTOFF_FPTR14R 62 /* LT-rel. fct ptr, right 14 bits. */
++#define R_PARISC_FPTR64 64 /* 64 bits function address. */
++#define R_PARISC_PLABEL32 65 /* 32 bits function address. */
++#define R_PARISC_PCREL64 72 /* 64 bits PC-rel. address. */
++#define R_PARISC_PCREL22F 74 /* 22 bits PC-rel. address. */
++#define R_PARISC_PCREL14WR 75 /* PC-rel. address, right 14 bits. */
++#define R_PARISC_PCREL14DR 76 /* PC rel. address, right 14 bits. */
++#define R_PARISC_PCREL16F 77 /* 16 bits PC-rel. address. */
++#define R_PARISC_PCREL16WF 78 /* 16 bits PC-rel. address. */
++#define R_PARISC_PCREL16DF 79 /* 16 bits PC-rel. address. */
++#define R_PARISC_DIR64 80 /* 64 bits of eff. address. */
++#define R_PARISC_DIR14WR 83 /* 14 bits of eff. address. */
++#define R_PARISC_DIR14DR 84 /* 14 bits of eff. address. */
++#define R_PARISC_DIR16F 85 /* 16 bits of eff. address. */
++#define R_PARISC_DIR16WF 86 /* 16 bits of eff. address. */
++#define R_PARISC_DIR16DF 87 /* 16 bits of eff. address. */
++#define R_PARISC_GPREL64 88 /* 64 bits of GP-rel. address. */
++#define R_PARISC_GPREL14WR 91 /* GP-rel. address, right 14 bits. */
++#define R_PARISC_GPREL14DR 92 /* GP-rel. address, right 14 bits. */
++#define R_PARISC_GPREL16F 93 /* 16 bits GP-rel. address. */
++#define R_PARISC_GPREL16WF 94 /* 16 bits GP-rel. address. */
++#define R_PARISC_GPREL16DF 95 /* 16 bits GP-rel. address. */
++#define R_PARISC_LTOFF64 96 /* 64 bits LT-rel. address. */
++#define R_PARISC_LTOFF14WR 99 /* LT-rel. address, right 14 bits. */
++#define R_PARISC_LTOFF14DR 100 /* LT-rel. address, right 14 bits. */
++#define R_PARISC_LTOFF16F 101 /* 16 bits LT-rel. address. */
++#define R_PARISC_LTOFF16WF 102 /* 16 bits LT-rel. address. */
++#define R_PARISC_LTOFF16DF 103 /* 16 bits LT-rel. address. */
++#define R_PARISC_SECREL64 104 /* 64 bits section rel. address. */
++#define R_PARISC_SEGREL64 112 /* 64 bits segment rel. address. */
++#define R_PARISC_PLTOFF14WR 115 /* PLT-rel. address, right 14 bits. */
++#define R_PARISC_PLTOFF14DR 116 /* PLT-rel. address, right 14 bits. */
++#define R_PARISC_PLTOFF16F 117 /* 16 bits LT-rel. address. */
++#define R_PARISC_PLTOFF16WF 118 /* 16 bits PLT-rel. address. */
++#define R_PARISC_PLTOFF16DF 119 /* 16 bits PLT-rel. address. */
++#define R_PARISC_LTOFF_FPTR64 120 /* 64 bits LT-rel. function ptr. */
++#define R_PARISC_LTOFF_FPTR14WR 123 /* LT-rel. fct. ptr., right 14 bits. */
++#define R_PARISC_LTOFF_FPTR14DR 124 /* LT-rel. fct. ptr., right 14 bits. */
++#define R_PARISC_LTOFF_FPTR16F 125 /* 16 bits LT-rel. function ptr. */
++#define R_PARISC_LTOFF_FPTR16WF 126 /* 16 bits LT-rel. function ptr. */
++#define R_PARISC_LTOFF_FPTR16DF 127 /* 16 bits LT-rel. function ptr. */
++#define R_PARISC_LORESERVE 128
++#define R_PARISC_COPY 128 /* Copy relocation. */
++#define R_PARISC_IPLT 129 /* Dynamic reloc, imported PLT */
++#define R_PARISC_EPLT 130 /* Dynamic reloc, exported PLT */
++#define R_PARISC_TPREL32 153 /* 32 bits TP-rel. address. */
++#define R_PARISC_TPREL21L 154 /* TP-rel. address, left 21 bits. */
++#define R_PARISC_TPREL14R 158 /* TP-rel. address, right 14 bits. */
++#define R_PARISC_LTOFF_TP21L 162 /* LT-TP-rel. address, left 21 bits. */
++#define R_PARISC_LTOFF_TP14R 166 /* LT-TP-rel. address, right 14 bits.*/
++#define R_PARISC_LTOFF_TP14F 167 /* 14 bits LT-TP-rel. address. */
++#define R_PARISC_TPREL64 216 /* 64 bits TP-rel. address. */
++#define R_PARISC_TPREL14WR 219 /* TP-rel. address, right 14 bits. */
++#define R_PARISC_TPREL14DR 220 /* TP-rel. address, right 14 bits. */
++#define R_PARISC_TPREL16F 221 /* 16 bits TP-rel. address. */
++#define R_PARISC_TPREL16WF 222 /* 16 bits TP-rel. address. */
++#define R_PARISC_TPREL16DF 223 /* 16 bits TP-rel. address. */
++#define R_PARISC_LTOFF_TP64 224 /* 64 bits LT-TP-rel. address. */
++#define R_PARISC_LTOFF_TP14WR 227 /* LT-TP-rel. address, right 14 bits.*/
++#define R_PARISC_LTOFF_TP14DR 228 /* LT-TP-rel. address, right 14 bits.*/
++#define R_PARISC_LTOFF_TP16F 229 /* 16 bits LT-TP-rel. address. */
++#define R_PARISC_LTOFF_TP16WF 230 /* 16 bits LT-TP-rel. address. */
++#define R_PARISC_LTOFF_TP16DF 231 /* 16 bits LT-TP-rel. address. */
++#define R_PARISC_HIRESERVE 255
++
++/* Legal values for p_type field of Elf32_Phdr/Elf64_Phdr. */
++
++#define PT_HP_TLS (PT_LOOS + 0x0)
++#define PT_HP_CORE_NONE (PT_LOOS + 0x1)
++#define PT_HP_CORE_VERSION (PT_LOOS + 0x2)
++#define PT_HP_CORE_KERNEL (PT_LOOS + 0x3)
++#define PT_HP_CORE_COMM (PT_LOOS + 0x4)
++#define PT_HP_CORE_PROC (PT_LOOS + 0x5)
++#define PT_HP_CORE_LOADABLE (PT_LOOS + 0x6)
++#define PT_HP_CORE_STACK (PT_LOOS + 0x7)
++#define PT_HP_CORE_SHM (PT_LOOS + 0x8)
++#define PT_HP_CORE_MMF (PT_LOOS + 0x9)
++#define PT_HP_PARALLEL (PT_LOOS + 0x10)
++#define PT_HP_FASTBIND (PT_LOOS + 0x11)
++#define PT_HP_OPT_ANNOT (PT_LOOS + 0x12)
++#define PT_HP_HSL_ANNOT (PT_LOOS + 0x13)
++#define PT_HP_STACK (PT_LOOS + 0x14)
++
++#define PT_PARISC_ARCHEXT 0x70000000
++#define PT_PARISC_UNWIND 0x70000001
++
++/* Legal values for p_flags field of Elf32_Phdr/Elf64_Phdr. */
++
++#define PF_PARISC_SBP 0x08000000
++
++#define PF_HP_PAGE_SIZE 0x00100000
++#define PF_HP_FAR_SHARED 0x00200000
++#define PF_HP_NEAR_SHARED 0x00400000
++#define PF_HP_CODE 0x01000000
++#define PF_HP_MODIFY 0x02000000
++#define PF_HP_LAZYSWAP 0x04000000
++#define PF_HP_SBP 0x08000000
++
++
++/* Alpha specific definitions. */
++
++/* Legal values for e_flags field of Elf64_Ehdr. */
++
++#define EF_ALPHA_32BIT 1 /* All addresses must be < 2GB. */
++#define EF_ALPHA_CANRELAX 2 /* Relocations for relaxing exist. */
++
++/* Legal values for sh_type field of Elf64_Shdr. */
++
++/* These two are primerily concerned with ECOFF debugging info. */
++#define SHT_ALPHA_DEBUG 0x70000001
++#define SHT_ALPHA_REGINFO 0x70000002
++
++/* Legal values for sh_flags field of Elf64_Shdr. */
++
++#define SHF_ALPHA_GPREL 0x10000000
++
++/* Legal values for st_other field of Elf64_Sym. */
++#define STO_ALPHA_NOPV 0x80 /* No PV required. */
++#define STO_ALPHA_STD_GPLOAD 0x88 /* PV only used for initial ldgp. */
++
++/* Alpha relocs. */
++
++#define R_ALPHA_NONE 0 /* No reloc */
++#define R_ALPHA_REFLONG 1 /* Direct 32 bit */
++#define R_ALPHA_REFQUAD 2 /* Direct 64 bit */
++#define R_ALPHA_GPREL32 3 /* GP relative 32 bit */
++#define R_ALPHA_LITERAL 4 /* GP relative 16 bit w/optimization */
++#define R_ALPHA_LITUSE 5 /* Optimization hint for LITERAL */
++#define R_ALPHA_GPDISP 6 /* Add displacement to GP */
++#define R_ALPHA_BRADDR 7 /* PC+4 relative 23 bit shifted */
++#define R_ALPHA_HINT 8 /* PC+4 relative 16 bit shifted */
++#define R_ALPHA_SREL16 9 /* PC relative 16 bit */
++#define R_ALPHA_SREL32 10 /* PC relative 32 bit */
++#define R_ALPHA_SREL64 11 /* PC relative 64 bit */
++#define R_ALPHA_GPRELHIGH 17 /* GP relative 32 bit, high 16 bits */
++#define R_ALPHA_GPRELLOW 18 /* GP relative 32 bit, low 16 bits */
++#define R_ALPHA_GPREL16 19 /* GP relative 16 bit */
++#define R_ALPHA_COPY 24 /* Copy symbol at runtime */
++#define R_ALPHA_GLOB_DAT 25 /* Create GOT entry */
++#define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */
++#define R_ALPHA_RELATIVE 27 /* Adjust by program base */
++#define R_ALPHA_TLS_GD_HI 28
++#define R_ALPHA_TLSGD 29
++#define R_ALPHA_TLS_LDM 30
++#define R_ALPHA_DTPMOD64 31
++#define R_ALPHA_GOTDTPREL 32
++#define R_ALPHA_DTPREL64 33
++#define R_ALPHA_DTPRELHI 34
++#define R_ALPHA_DTPRELLO 35
++#define R_ALPHA_DTPREL16 36
++#define R_ALPHA_GOTTPREL 37
++#define R_ALPHA_TPREL64 38
++#define R_ALPHA_TPRELHI 39
++#define R_ALPHA_TPRELLO 40
++#define R_ALPHA_TPREL16 41
++/* Keep this the last entry. */
++#define R_ALPHA_NUM 46
++
++/* Magic values of the LITUSE relocation addend. */
++#define LITUSE_ALPHA_ADDR 0
++#define LITUSE_ALPHA_BASE 1
++#define LITUSE_ALPHA_BYTOFF 2
++#define LITUSE_ALPHA_JSR 3
++#define LITUSE_ALPHA_TLS_GD 4
++#define LITUSE_ALPHA_TLS_LDM 5
++
++
++/* PowerPC specific declarations */
++
++/* Values for Elf32/64_Ehdr.e_flags. */
++#define EF_PPC_EMB 0x80000000 /* PowerPC embedded flag */
++
++/* Cygnus local bits below */
++#define EF_PPC_RELOCATABLE 0x00010000 /* PowerPC -mrelocatable flag*/
++#define EF_PPC_RELOCATABLE_LIB 0x00008000 /* PowerPC -mrelocatable-lib
++ flag */
++
++/* PowerPC relocations defined by the ABIs */
++#define R_PPC_NONE 0
++#define R_PPC_ADDR32 1 /* 32bit absolute address */
++#define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */
++#define R_PPC_ADDR16 3 /* 16bit absolute address */
++#define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */
++#define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */
++#define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */
++#define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */
++#define R_PPC_ADDR14_BRTAKEN 8
++#define R_PPC_ADDR14_BRNTAKEN 9
++#define R_PPC_REL24 10 /* PC relative 26 bit */
++#define R_PPC_REL14 11 /* PC relative 16 bit */
++#define R_PPC_REL14_BRTAKEN 12
++#define R_PPC_REL14_BRNTAKEN 13
++#define R_PPC_GOT16 14
++#define R_PPC_GOT16_LO 15
++#define R_PPC_GOT16_HI 16
++#define R_PPC_GOT16_HA 17
++#define R_PPC_PLTREL24 18
++#define R_PPC_COPY 19
++#define R_PPC_GLOB_DAT 20
++#define R_PPC_JMP_SLOT 21
++#define R_PPC_RELATIVE 22
++#define R_PPC_LOCAL24PC 23
++#define R_PPC_UADDR32 24
++#define R_PPC_UADDR16 25
++#define R_PPC_REL32 26
++#define R_PPC_PLT32 27
++#define R_PPC_PLTREL32 28
++#define R_PPC_PLT16_LO 29
++#define R_PPC_PLT16_HI 30
++#define R_PPC_PLT16_HA 31
++#define R_PPC_SDAREL16 32
++#define R_PPC_SECTOFF 33
++#define R_PPC_SECTOFF_LO 34
++#define R_PPC_SECTOFF_HI 35
++#define R_PPC_SECTOFF_HA 36
++
++/* PowerPC relocations defined for the TLS access ABI. */
++#define R_PPC_TLS 67 /* none (sym+add)@tls */
++#define R_PPC_DTPMOD32 68 /* word32 (sym+add)@dtpmod */
++#define R_PPC_TPREL16 69 /* half16* (sym+add)@tprel */
++#define R_PPC_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
++#define R_PPC_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
++#define R_PPC_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
++#define R_PPC_TPREL32 73 /* word32 (sym+add)@tprel */
++#define R_PPC_DTPREL16 74 /* half16* (sym+add)@dtprel */
++#define R_PPC_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
++#define R_PPC_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
++#define R_PPC_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
++#define R_PPC_DTPREL32 78 /* word32 (sym+add)@dtprel */
++#define R_PPC_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
++#define R_PPC_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
++#define R_PPC_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
++#define R_PPC_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
++#define R_PPC_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
++#define R_PPC_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
++#define R_PPC_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
++#define R_PPC_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
++#define R_PPC_GOT_TPREL16 87 /* half16* (sym+add)@got@tprel */
++#define R_PPC_GOT_TPREL16_LO 88 /* half16 (sym+add)@got@tprel@l */
++#define R_PPC_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
++#define R_PPC_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
++#define R_PPC_GOT_DTPREL16 91 /* half16* (sym+add)@got@dtprel */
++#define R_PPC_GOT_DTPREL16_LO 92 /* half16* (sym+add)@got@dtprel@l */
++#define R_PPC_GOT_DTPREL16_HI 93 /* half16* (sym+add)@got@dtprel@h */
++#define R_PPC_GOT_DTPREL16_HA 94 /* half16* (sym+add)@got@dtprel@ha */
++
++/* Keep this the last entry. */
++#define R_PPC_NUM 95
++
++/* The remaining relocs are from the Embedded ELF ABI, and are not
++ in the SVR4 ELF ABI. */
++#define R_PPC_EMB_NADDR32 101
++#define R_PPC_EMB_NADDR16 102
++#define R_PPC_EMB_NADDR16_LO 103
++#define R_PPC_EMB_NADDR16_HI 104
++#define R_PPC_EMB_NADDR16_HA 105
++#define R_PPC_EMB_SDAI16 106
++#define R_PPC_EMB_SDA2I16 107
++#define R_PPC_EMB_SDA2REL 108
++#define R_PPC_EMB_SDA21 109 /* 16 bit offset in SDA */
++#define R_PPC_EMB_MRKREF 110
++#define R_PPC_EMB_RELSEC16 111
++#define R_PPC_EMB_RELST_LO 112
++#define R_PPC_EMB_RELST_HI 113
++#define R_PPC_EMB_RELST_HA 114
++#define R_PPC_EMB_BIT_FLD 115
++#define R_PPC_EMB_RELSDA 116 /* 16 bit relative offset in SDA */
++
++/* Diab tool relocations. */
++#define R_PPC_DIAB_SDA21_LO 180 /* like EMB_SDA21, but lower 16 bit */
++#define R_PPC_DIAB_SDA21_HI 181 /* like EMB_SDA21, but high 16 bit */
++#define R_PPC_DIAB_SDA21_HA 182 /* like EMB_SDA21, adjusted high 16 */
++#define R_PPC_DIAB_RELSDA_LO 183 /* like EMB_RELSDA, but lower 16 bit */
++#define R_PPC_DIAB_RELSDA_HI 184 /* like EMB_RELSDA, but high 16 bit */
++#define R_PPC_DIAB_RELSDA_HA 185 /* like EMB_RELSDA, adjusted high 16 */
++
++/* This is a phony reloc to handle any old fashioned TOC16 references
++ that may still be in object files. */
++#define R_PPC_TOC16 255
++
++
++/* PowerPC64 relocations defined by the ABIs */
++#define R_PPC64_NONE R_PPC_NONE
++#define R_PPC64_ADDR32 R_PPC_ADDR32 /* 32bit absolute address */
++#define R_PPC64_ADDR24 R_PPC_ADDR24 /* 26bit address, word aligned */
++#define R_PPC64_ADDR16 R_PPC_ADDR16 /* 16bit absolute address */
++#define R_PPC64_ADDR16_LO R_PPC_ADDR16_LO /* lower 16bits of address */
++#define R_PPC64_ADDR16_HI R_PPC_ADDR16_HI /* high 16bits of address. */
++#define R_PPC64_ADDR16_HA R_PPC_ADDR16_HA /* adjusted high 16bits. */
++#define R_PPC64_ADDR14 R_PPC_ADDR14 /* 16bit address, word aligned */
++#define R_PPC64_ADDR14_BRTAKEN R_PPC_ADDR14_BRTAKEN
++#define R_PPC64_ADDR14_BRNTAKEN R_PPC_ADDR14_BRNTAKEN
++#define R_PPC64_REL24 R_PPC_REL24 /* PC-rel. 26 bit, word aligned */
++#define R_PPC64_REL14 R_PPC_REL14 /* PC relative 16 bit */
++#define R_PPC64_REL14_BRTAKEN R_PPC_REL14_BRTAKEN
++#define R_PPC64_REL14_BRNTAKEN R_PPC_REL14_BRNTAKEN
++#define R_PPC64_GOT16 R_PPC_GOT16
++#define R_PPC64_GOT16_LO R_PPC_GOT16_LO
++#define R_PPC64_GOT16_HI R_PPC_GOT16_HI
++#define R_PPC64_GOT16_HA R_PPC_GOT16_HA
++
++#define R_PPC64_COPY R_PPC_COPY
++#define R_PPC64_GLOB_DAT R_PPC_GLOB_DAT
++#define R_PPC64_JMP_SLOT R_PPC_JMP_SLOT
++#define R_PPC64_RELATIVE R_PPC_RELATIVE
++
++#define R_PPC64_UADDR32 R_PPC_UADDR32
++#define R_PPC64_UADDR16 R_PPC_UADDR16
++#define R_PPC64_REL32 R_PPC_REL32
++#define R_PPC64_PLT32 R_PPC_PLT32
++#define R_PPC64_PLTREL32 R_PPC_PLTREL32
++#define R_PPC64_PLT16_LO R_PPC_PLT16_LO
++#define R_PPC64_PLT16_HI R_PPC_PLT16_HI
++#define R_PPC64_PLT16_HA R_PPC_PLT16_HA
++
++#define R_PPC64_SECTOFF R_PPC_SECTOFF
++#define R_PPC64_SECTOFF_LO R_PPC_SECTOFF_LO
++#define R_PPC64_SECTOFF_HI R_PPC_SECTOFF_HI
++#define R_PPC64_SECTOFF_HA R_PPC_SECTOFF_HA
++#define R_PPC64_ADDR30 37 /* word30 (S + A - P) >> 2 */
++#define R_PPC64_ADDR64 38 /* doubleword64 S + A */
++#define R_PPC64_ADDR16_HIGHER 39 /* half16 #higher(S + A) */
++#define R_PPC64_ADDR16_HIGHERA 40 /* half16 #highera(S + A) */
++#define R_PPC64_ADDR16_HIGHEST 41 /* half16 #highest(S + A) */
++#define R_PPC64_ADDR16_HIGHESTA 42 /* half16 #highesta(S + A) */
++#define R_PPC64_UADDR64 43 /* doubleword64 S + A */
++#define R_PPC64_REL64 44 /* doubleword64 S + A - P */
++#define R_PPC64_PLT64 45 /* doubleword64 L + A */
++#define R_PPC64_PLTREL64 46 /* doubleword64 L + A - P */
++#define R_PPC64_TOC16 47 /* half16* S + A - .TOC */
++#define R_PPC64_TOC16_LO 48 /* half16 #lo(S + A - .TOC.) */
++#define R_PPC64_TOC16_HI 49 /* half16 #hi(S + A - .TOC.) */
++#define R_PPC64_TOC16_HA 50 /* half16 #ha(S + A - .TOC.) */
++#define R_PPC64_TOC 51 /* doubleword64 .TOC */
++#define R_PPC64_PLTGOT16 52 /* half16* M + A */
++#define R_PPC64_PLTGOT16_LO 53 /* half16 #lo(M + A) */
++#define R_PPC64_PLTGOT16_HI 54 /* half16 #hi(M + A) */
++#define R_PPC64_PLTGOT16_HA 55 /* half16 #ha(M + A) */
++
++#define R_PPC64_ADDR16_DS 56 /* half16ds* (S + A) >> 2 */
++#define R_PPC64_ADDR16_LO_DS 57 /* half16ds #lo(S + A) >> 2 */
++#define R_PPC64_GOT16_DS 58 /* half16ds* (G + A) >> 2 */
++#define R_PPC64_GOT16_LO_DS 59 /* half16ds #lo(G + A) >> 2 */
++#define R_PPC64_PLT16_LO_DS 60 /* half16ds #lo(L + A) >> 2 */
++#define R_PPC64_SECTOFF_DS 61 /* half16ds* (R + A) >> 2 */
++#define R_PPC64_SECTOFF_LO_DS 62 /* half16ds #lo(R + A) >> 2 */
++#define R_PPC64_TOC16_DS 63 /* half16ds* (S + A - .TOC.) >> 2 */
++#define R_PPC64_TOC16_LO_DS 64 /* half16ds #lo(S + A - .TOC.) >> 2 */
++#define R_PPC64_PLTGOT16_DS 65 /* half16ds* (M + A) >> 2 */
++#define R_PPC64_PLTGOT16_LO_DS 66 /* half16ds #lo(M + A) >> 2 */
++
++/* PowerPC64 relocations defined for the TLS access ABI. */
++#define R_PPC64_TLS 67 /* none (sym+add)@tls */
++#define R_PPC64_DTPMOD64 68 /* doubleword64 (sym+add)@dtpmod */
++#define R_PPC64_TPREL16 69 /* half16* (sym+add)@tprel */
++#define R_PPC64_TPREL16_LO 70 /* half16 (sym+add)@tprel@l */
++#define R_PPC64_TPREL16_HI 71 /* half16 (sym+add)@tprel@h */
++#define R_PPC64_TPREL16_HA 72 /* half16 (sym+add)@tprel@ha */
++#define R_PPC64_TPREL64 73 /* doubleword64 (sym+add)@tprel */
++#define R_PPC64_DTPREL16 74 /* half16* (sym+add)@dtprel */
++#define R_PPC64_DTPREL16_LO 75 /* half16 (sym+add)@dtprel@l */
++#define R_PPC64_DTPREL16_HI 76 /* half16 (sym+add)@dtprel@h */
++#define R_PPC64_DTPREL16_HA 77 /* half16 (sym+add)@dtprel@ha */
++#define R_PPC64_DTPREL64 78 /* doubleword64 (sym+add)@dtprel */
++#define R_PPC64_GOT_TLSGD16 79 /* half16* (sym+add)@got@tlsgd */
++#define R_PPC64_GOT_TLSGD16_LO 80 /* half16 (sym+add)@got@tlsgd@l */
++#define R_PPC64_GOT_TLSGD16_HI 81 /* half16 (sym+add)@got@tlsgd@h */
++#define R_PPC64_GOT_TLSGD16_HA 82 /* half16 (sym+add)@got@tlsgd@ha */
++#define R_PPC64_GOT_TLSLD16 83 /* half16* (sym+add)@got@tlsld */
++#define R_PPC64_GOT_TLSLD16_LO 84 /* half16 (sym+add)@got@tlsld@l */
++#define R_PPC64_GOT_TLSLD16_HI 85 /* half16 (sym+add)@got@tlsld@h */
++#define R_PPC64_GOT_TLSLD16_HA 86 /* half16 (sym+add)@got@tlsld@ha */
++#define R_PPC64_GOT_TPREL16_DS 87 /* half16ds* (sym+add)@got@tprel */
++#define R_PPC64_GOT_TPREL16_LO_DS 88 /* half16ds (sym+add)@got@tprel@l */
++#define R_PPC64_GOT_TPREL16_HI 89 /* half16 (sym+add)@got@tprel@h */
++#define R_PPC64_GOT_TPREL16_HA 90 /* half16 (sym+add)@got@tprel@ha */
++#define R_PPC64_GOT_DTPREL16_DS 91 /* half16ds* (sym+add)@got@dtprel */
++#define R_PPC64_GOT_DTPREL16_LO_DS 92 /* half16ds (sym+add)@got@dtprel@l */
++#define R_PPC64_GOT_DTPREL16_HI 93 /* half16 (sym+add)@got@dtprel@h */
++#define R_PPC64_GOT_DTPREL16_HA 94 /* half16 (sym+add)@got@dtprel@ha */
++#define R_PPC64_TPREL16_DS 95 /* half16ds* (sym+add)@tprel */
++#define R_PPC64_TPREL16_LO_DS 96 /* half16ds (sym+add)@tprel@l */
++#define R_PPC64_TPREL16_HIGHER 97 /* half16 (sym+add)@tprel@higher */
++#define R_PPC64_TPREL16_HIGHERA 98 /* half16 (sym+add)@tprel@highera */
++#define R_PPC64_TPREL16_HIGHEST 99 /* half16 (sym+add)@tprel@highest */
++#define R_PPC64_TPREL16_HIGHESTA 100 /* half16 (sym+add)@tprel@highesta */
++#define R_PPC64_DTPREL16_DS 101 /* half16ds* (sym+add)@dtprel */
++#define R_PPC64_DTPREL16_LO_DS 102 /* half16ds (sym+add)@dtprel@l */
++#define R_PPC64_DTPREL16_HIGHER 103 /* half16 (sym+add)@dtprel@higher */
++#define R_PPC64_DTPREL16_HIGHERA 104 /* half16 (sym+add)@dtprel@highera */
++#define R_PPC64_DTPREL16_HIGHEST 105 /* half16 (sym+add)@dtprel@highest */
++#define R_PPC64_DTPREL16_HIGHESTA 106 /* half16 (sym+add)@dtprel@highesta */
++
++/* Keep this the last entry. */
++#define R_PPC64_NUM 107
++
++/* PowerPC64 specific values for the Dyn d_tag field. */
++#define DT_PPC64_GLINK (DT_LOPROC + 0)
++#define DT_PPC64_NUM 1
++
++
++/* ARM specific declarations */
++
++/* Processor specific flags for the ELF header e_flags field. */
++#define EF_ARM_RELEXEC 0x01
++#define EF_ARM_HASENTRY 0x02
++#define EF_ARM_INTERWORK 0x04
++#define EF_ARM_APCS_26 0x08
++#define EF_ARM_APCS_FLOAT 0x10
++#define EF_ARM_PIC 0x20
++#define EF_ARM_ALIGN8 0x40 /* 8-bit structure alignment is in use */
++#define EF_ARM_NEW_ABI 0x80
++#define EF_ARM_OLD_ABI 0x100
++
++/* Other constants defined in the ARM ELF spec. version B-01. */
++/* NB. These conflict with values defined above. */
++#define EF_ARM_SYMSARESORTED 0x04
++#define EF_ARM_DYNSYMSUSESEGIDX 0x08
++#define EF_ARM_MAPSYMSFIRST 0x10
++#define EF_ARM_EABIMASK 0XFF000000
++
++#define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
++#define EF_ARM_EABI_UNKNOWN 0x00000000
++#define EF_ARM_EABI_VER1 0x01000000
++#define EF_ARM_EABI_VER2 0x02000000
++
++/* Additional symbol types for Thumb */
++#define STT_ARM_TFUNC 0xd
++
++/* ARM-specific values for sh_flags */
++#define SHF_ARM_ENTRYSECT 0x10000000 /* Section contains an entry point */
++#define SHF_ARM_COMDEF 0x80000000 /* Section may be multiply defined
++ in the input to a link step */
++
++/* ARM-specific program header flags */
++#define PF_ARM_SB 0x10000000 /* Segment contains the location
++ addressed by the static base */
++
++/* ARM relocs. */
++#define R_ARM_NONE 0 /* No reloc */
++#define R_ARM_PC24 1 /* PC relative 26 bit branch */
++#define R_ARM_ABS32 2 /* Direct 32 bit */
++#define R_ARM_REL32 3 /* PC relative 32 bit */
++#define R_ARM_PC13 4
++#define R_ARM_ABS16 5 /* Direct 16 bit */
++#define R_ARM_ABS12 6 /* Direct 12 bit */
++#define R_ARM_THM_ABS5 7
++#define R_ARM_ABS8 8 /* Direct 8 bit */
++#define R_ARM_SBREL32 9
++#define R_ARM_THM_PC22 10
++#define R_ARM_THM_PC8 11
++#define R_ARM_AMP_VCALL9 12
++#define R_ARM_SWI24 13
++#define R_ARM_THM_SWI8 14
++#define R_ARM_XPC25 15
++#define R_ARM_THM_XPC22 16
++#define R_ARM_COPY 20 /* Copy symbol at runtime */
++#define R_ARM_GLOB_DAT 21 /* Create GOT entry */
++#define R_ARM_JUMP_SLOT 22 /* Create PLT entry */
++#define R_ARM_RELATIVE 23 /* Adjust by program base */
++#define R_ARM_GOTOFF 24 /* 32 bit offset to GOT */
++#define R_ARM_GOTPC 25 /* 32 bit PC relative offset to GOT */
++#define R_ARM_GOT32 26 /* 32 bit GOT entry */
++#define R_ARM_PLT32 27 /* 32 bit PLT address */
++#define R_ARM_ALU_PCREL_7_0 32
++#define R_ARM_ALU_PCREL_15_8 33
++#define R_ARM_ALU_PCREL_23_15 34
++#define R_ARM_LDR_SBREL_11_0 35
++#define R_ARM_ALU_SBREL_19_12 36
++#define R_ARM_ALU_SBREL_27_20 37
++#define R_ARM_GNU_VTENTRY 100
++#define R_ARM_GNU_VTINHERIT 101
++#define R_ARM_THM_PC11 102 /* thumb unconditional branch */
++#define R_ARM_THM_PC9 103 /* thumb conditional branch */
++#define R_ARM_RXPC25 249
++#define R_ARM_RSBREL32 250
++#define R_ARM_THM_RPC22 251
++#define R_ARM_RREL32 252
++#define R_ARM_RABS22 253
++#define R_ARM_RPC24 254
++#define R_ARM_RBASE 255
++/* Keep this the last entry. */
++#define R_ARM_NUM 256
++
++/* IA-64 specific declarations. */
++
++/* Processor specific flags for the Ehdr e_flags field. */
++#define EF_IA_64_MASKOS 0x0000000f /* os-specific flags */
++#define EF_IA_64_ABI64 0x00000010 /* 64-bit ABI */
++#define EF_IA_64_ARCH 0xff000000 /* arch. version mask */
++
++/* Processor specific values for the Phdr p_type field. */
++#define PT_IA_64_ARCHEXT (PT_LOPROC + 0) /* arch extension bits */
++#define PT_IA_64_UNWIND (PT_LOPROC + 1) /* ia64 unwind bits */
++
++/* Processor specific flags for the Phdr p_flags field. */
++#define PF_IA_64_NORECOV 0x80000000 /* spec insns w/o recovery */
++
++/* Processor specific values for the Shdr sh_type field. */
++#define SHT_IA_64_EXT (SHT_LOPROC + 0) /* extension bits */
++#define SHT_IA_64_UNWIND (SHT_LOPROC + 1) /* unwind bits */
++
++/* Processor specific flags for the Shdr sh_flags field. */
++#define SHF_IA_64_SHORT 0x10000000 /* section near gp */
++#define SHF_IA_64_NORECOV 0x20000000 /* spec insns w/o recovery */
++
++/* Processor specific values for the Dyn d_tag field. */
++#define DT_IA_64_PLT_RESERVE (DT_LOPROC + 0)
++#define DT_IA_64_NUM 1
++
++/* IA-64 relocations. */
++#define R_IA64_NONE 0x00 /* none */
++#define R_IA64_IMM14 0x21 /* symbol + addend, add imm14 */
++#define R_IA64_IMM22 0x22 /* symbol + addend, add imm22 */
++#define R_IA64_IMM64 0x23 /* symbol + addend, mov imm64 */
++#define R_IA64_DIR32MSB 0x24 /* symbol + addend, data4 MSB */
++#define R_IA64_DIR32LSB 0x25 /* symbol + addend, data4 LSB */
++#define R_IA64_DIR64MSB 0x26 /* symbol + addend, data8 MSB */
++#define R_IA64_DIR64LSB 0x27 /* symbol + addend, data8 LSB */
++#define R_IA64_GPREL22 0x2a /* @gprel(sym + add), add imm22 */
++#define R_IA64_GPREL64I 0x2b /* @gprel(sym + add), mov imm64 */
++#define R_IA64_GPREL32MSB 0x2c /* @gprel(sym + add), data4 MSB */
++#define R_IA64_GPREL32LSB 0x2d /* @gprel(sym + add), data4 LSB */
++#define R_IA64_GPREL64MSB 0x2e /* @gprel(sym + add), data8 MSB */
++#define R_IA64_GPREL64LSB 0x2f /* @gprel(sym + add), data8 LSB */
++#define R_IA64_LTOFF22 0x32 /* @ltoff(sym + add), add imm22 */
++#define R_IA64_LTOFF64I 0x33 /* @ltoff(sym + add), mov imm64 */
++#define R_IA64_PLTOFF22 0x3a /* @pltoff(sym + add), add imm22 */
++#define R_IA64_PLTOFF64I 0x3b /* @pltoff(sym + add), mov imm64 */
++#define R_IA64_PLTOFF64MSB 0x3e /* @pltoff(sym + add), data8 MSB */
++#define R_IA64_PLTOFF64LSB 0x3f /* @pltoff(sym + add), data8 LSB */
++#define R_IA64_FPTR64I 0x43 /* @fptr(sym + add), mov imm64 */
++#define R_IA64_FPTR32MSB 0x44 /* @fptr(sym + add), data4 MSB */
++#define R_IA64_FPTR32LSB 0x45 /* @fptr(sym + add), data4 LSB */
++#define R_IA64_FPTR64MSB 0x46 /* @fptr(sym + add), data8 MSB */
++#define R_IA64_FPTR64LSB 0x47 /* @fptr(sym + add), data8 LSB */
++#define R_IA64_PCREL60B 0x48 /* @pcrel(sym + add), brl */
++#define R_IA64_PCREL21B 0x49 /* @pcrel(sym + add), ptb, call */
++#define R_IA64_PCREL21M 0x4a /* @pcrel(sym + add), chk.s */
++#define R_IA64_PCREL21F 0x4b /* @pcrel(sym + add), fchkf */
++#define R_IA64_PCREL32MSB 0x4c /* @pcrel(sym + add), data4 MSB */
++#define R_IA64_PCREL32LSB 0x4d /* @pcrel(sym + add), data4 LSB */
++#define R_IA64_PCREL64MSB 0x4e /* @pcrel(sym + add), data8 MSB */
++#define R_IA64_PCREL64LSB 0x4f /* @pcrel(sym + add), data8 LSB */
++#define R_IA64_LTOFF_FPTR22 0x52 /* @ltoff(@fptr(s+a)), imm22 */
++#define R_IA64_LTOFF_FPTR64I 0x53 /* @ltoff(@fptr(s+a)), imm64 */
++#define R_IA64_LTOFF_FPTR32MSB 0x54 /* @ltoff(@fptr(s+a)), data4 MSB */
++#define R_IA64_LTOFF_FPTR32LSB 0x55 /* @ltoff(@fptr(s+a)), data4 LSB */
++#define R_IA64_LTOFF_FPTR64MSB 0x56 /* @ltoff(@fptr(s+a)), data8 MSB */
++#define R_IA64_LTOFF_FPTR64LSB 0x57 /* @ltoff(@fptr(s+a)), data8 LSB */
++#define R_IA64_SEGREL32MSB 0x5c /* @segrel(sym + add), data4 MSB */
++#define R_IA64_SEGREL32LSB 0x5d /* @segrel(sym + add), data4 LSB */
++#define R_IA64_SEGREL64MSB 0x5e /* @segrel(sym + add), data8 MSB */
++#define R_IA64_SEGREL64LSB 0x5f /* @segrel(sym + add), data8 LSB */
++#define R_IA64_SECREL32MSB 0x64 /* @secrel(sym + add), data4 MSB */
++#define R_IA64_SECREL32LSB 0x65 /* @secrel(sym + add), data4 LSB */
++#define R_IA64_SECREL64MSB 0x66 /* @secrel(sym + add), data8 MSB */
++#define R_IA64_SECREL64LSB 0x67 /* @secrel(sym + add), data8 LSB */
++#define R_IA64_REL32MSB 0x6c /* data 4 + REL */
++#define R_IA64_REL32LSB 0x6d /* data 4 + REL */
++#define R_IA64_REL64MSB 0x6e /* data 8 + REL */
++#define R_IA64_REL64LSB 0x6f /* data 8 + REL */
++#define R_IA64_LTV32MSB 0x74 /* symbol + addend, data4 MSB */
++#define R_IA64_LTV32LSB 0x75 /* symbol + addend, data4 LSB */
++#define R_IA64_LTV64MSB 0x76 /* symbol + addend, data8 MSB */
++#define R_IA64_LTV64LSB 0x77 /* symbol + addend, data8 LSB */
++#define R_IA64_PCREL21BI 0x79 /* @pcrel(sym + add), 21bit inst */
++#define R_IA64_PCREL22 0x7a /* @pcrel(sym + add), 22bit inst */
++#define R_IA64_PCREL64I 0x7b /* @pcrel(sym + add), 64bit inst */
++#define R_IA64_IPLTMSB 0x80 /* dynamic reloc, imported PLT, MSB */
++#define R_IA64_IPLTLSB 0x81 /* dynamic reloc, imported PLT, LSB */
++#define R_IA64_COPY 0x84 /* copy relocation */
++#define R_IA64_SUB 0x85 /* Addend and symbol difference */
++#define R_IA64_LTOFF22X 0x86 /* LTOFF22, relaxable. */
++#define R_IA64_LDXMOV 0x87 /* Use of LTOFF22X. */
++#define R_IA64_TPREL14 0x91 /* @tprel(sym + add), imm14 */
++#define R_IA64_TPREL22 0x92 /* @tprel(sym + add), imm22 */
++#define R_IA64_TPREL64I 0x93 /* @tprel(sym + add), imm64 */
++#define R_IA64_TPREL64MSB 0x96 /* @tprel(sym + add), data8 MSB */
++#define R_IA64_TPREL64LSB 0x97 /* @tprel(sym + add), data8 LSB */
++#define R_IA64_LTOFF_TPREL22 0x9a /* @ltoff(@tprel(s+a)), imm2 */
++#define R_IA64_DTPMOD64MSB 0xa6 /* @dtpmod(sym + add), data8 MSB */
++#define R_IA64_DTPMOD64LSB 0xa7 /* @dtpmod(sym + add), data8 LSB */
++#define R_IA64_LTOFF_DTPMOD22 0xaa /* @ltoff(@dtpmod(sym + add)), imm22 */
++#define R_IA64_DTPREL14 0xb1 /* @dtprel(sym + add), imm14 */
++#define R_IA64_DTPREL22 0xb2 /* @dtprel(sym + add), imm22 */
++#define R_IA64_DTPREL64I 0xb3 /* @dtprel(sym + add), imm64 */
++#define R_IA64_DTPREL32MSB 0xb4 /* @dtprel(sym + add), data4 MSB */
++#define R_IA64_DTPREL32LSB 0xb5 /* @dtprel(sym + add), data4 LSB */
++#define R_IA64_DTPREL64MSB 0xb6 /* @dtprel(sym + add), data8 MSB */
++#define R_IA64_DTPREL64LSB 0xb7 /* @dtprel(sym + add), data8 LSB */
++#define R_IA64_LTOFF_DTPREL22 0xba /* @ltoff(@dtprel(s+a)), imm22 */
++
++/* SH specific declarations */
++
++/* SH relocs. */
++#define R_SH_NONE 0
++#define R_SH_DIR32 1
++#define R_SH_REL32 2
++#define R_SH_DIR8WPN 3
++#define R_SH_IND12W 4
++#define R_SH_DIR8WPL 5
++#define R_SH_DIR8WPZ 6
++#define R_SH_DIR8BP 7
++#define R_SH_DIR8W 8
++#define R_SH_DIR8L 9
++#define R_SH_SWITCH16 25
++#define R_SH_SWITCH32 26
++#define R_SH_USES 27
++#define R_SH_COUNT 28
++#define R_SH_ALIGN 29
++#define R_SH_CODE 30
++#define R_SH_DATA 31
++#define R_SH_LABEL 32
++#define R_SH_SWITCH8 33
++#define R_SH_GNU_VTINHERIT 34
++#define R_SH_GNU_VTENTRY 35
++#define R_SH_TLS_GD_32 144
++#define R_SH_TLS_LD_32 145
++#define R_SH_TLS_LDO_32 146
++#define R_SH_TLS_IE_32 147
++#define R_SH_TLS_LE_32 148
++#define R_SH_TLS_DTPMOD32 149
++#define R_SH_TLS_DTPOFF32 150
++#define R_SH_TLS_TPOFF32 151
++#define R_SH_GOT32 160
++#define R_SH_PLT32 161
++#define R_SH_COPY 162
++#define R_SH_GLOB_DAT 163
++#define R_SH_JMP_SLOT 164
++#define R_SH_RELATIVE 165
++#define R_SH_GOTOFF 166
++#define R_SH_GOTPC 167
++/* Keep this the last entry. */
++#define R_SH_NUM 256
++
++/* Additional s390 relocs */
++
++#define R_390_NONE 0 /* No reloc. */
++#define R_390_8 1 /* Direct 8 bit. */
++#define R_390_12 2 /* Direct 12 bit. */
++#define R_390_16 3 /* Direct 16 bit. */
++#define R_390_32 4 /* Direct 32 bit. */
++#define R_390_PC32 5 /* PC relative 32 bit. */
++#define R_390_GOT12 6 /* 12 bit GOT offset. */
++#define R_390_GOT32 7 /* 32 bit GOT offset. */
++#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
++#define R_390_COPY 9 /* Copy symbol at runtime. */
++#define R_390_GLOB_DAT 10 /* Create GOT entry. */
++#define R_390_JMP_SLOT 11 /* Create PLT entry. */
++#define R_390_RELATIVE 12 /* Adjust by program base. */
++#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
++#define R_390_GOTPC 14 /* 32 bit PC relative offset to GOT. */
++#define R_390_GOT16 15 /* 16 bit GOT offset. */
++#define R_390_PC16 16 /* PC relative 16 bit. */
++#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
++#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
++#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
++#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
++#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
++#define R_390_64 22 /* Direct 64 bit. */
++#define R_390_PC64 23 /* PC relative 64 bit. */
++#define R_390_GOT64 24 /* 64 bit GOT offset. */
++#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
++#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
++#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
++#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
++#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
++#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
++#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
++#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
++#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
++#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
++#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
++#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
++#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
++#define R_390_TLS_GDCALL 38 /* Tag for function call in general
++ dynamic TLS code. */
++#define R_390_TLS_LDCALL 39 /* Tag for function call in local
++ dynamic TLS code. */
++#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
++ thread local data. */
++#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
++ thread local data. */
++#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
++ block offset. */
++#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
++ block offset. */
++#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
++ block offset. */
++#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
++ thread local data in LE code. */
++#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
++ thread local data in LE code. */
++#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
++ negated static TLS block offset. */
++#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
++ negated static TLS block offset. */
++#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
++ negated static TLS block offset. */
++#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
++ static TLS block. */
++#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
++ static TLS block. */
++#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
++ block. */
++#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
++ block. */
++#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
++#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
++#define R_390_TLS_TPOFF 56 /* Negated offset in static TLS
++ block. */
++
++/* Keep this the last entry. */
++#define R_390_NUM 57
++
++/* CRIS relocations. */
++#define R_CRIS_NONE 0
++#define R_CRIS_8 1
++#define R_CRIS_16 2
++#define R_CRIS_32 3
++#define R_CRIS_8_PCREL 4
++#define R_CRIS_16_PCREL 5
++#define R_CRIS_32_PCREL 6
++#define R_CRIS_GNU_VTINHERIT 7
++#define R_CRIS_GNU_VTENTRY 8
++#define R_CRIS_COPY 9
++#define R_CRIS_GLOB_DAT 10
++#define R_CRIS_JUMP_SLOT 11
++#define R_CRIS_RELATIVE 12
++#define R_CRIS_16_GOT 13
++#define R_CRIS_32_GOT 14
++#define R_CRIS_16_GOTPLT 15
++#define R_CRIS_32_GOTPLT 16
++#define R_CRIS_32_GOTREL 17
++#define R_CRIS_32_PLT_GOTREL 18
++#define R_CRIS_32_PLT_PCREL 19
++
++#define R_CRIS_NUM 20
++
++/* AMD x86-64 relocations. */
++#define R_X86_64_NONE 0 /* No reloc */
++#define R_X86_64_64 1 /* Direct 64 bit */
++#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
++#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
++#define R_X86_64_PLT32 4 /* 32 bit PLT address */
++#define R_X86_64_COPY 5 /* Copy symbol at runtime */
++#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
++#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
++#define R_X86_64_RELATIVE 8 /* Adjust by program base */
++#define R_X86_64_GOTPCREL 9 /* 32 bit signed PC relative
++ offset to GOT */
++#define R_X86_64_32 10 /* Direct 32 bit zero extended */
++#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
++#define R_X86_64_16 12 /* Direct 16 bit zero extended */
++#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
++#define R_X86_64_8 14 /* Direct 8 bit sign extended */
++#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
++#define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
++#define R_X86_64_DTPOFF64 17 /* Offset in module's TLS block */
++#define R_X86_64_TPOFF64 18 /* Offset in initial TLS block */
++#define R_X86_64_TLSGD 19 /* 32 bit signed PC relative offset
++ to two GOT entries for GD symbol */
++#define R_X86_64_TLSLD 20 /* 32 bit signed PC relative offset
++ to two GOT entries for LD symbol */
++#define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
++#define R_X86_64_GOTTPOFF 22 /* 32 bit signed PC relative offset
++ to GOT entry for IE symbol */
++#define R_X86_64_TPOFF32 23 /* Offset in initial TLS block */
++
++#define R_X86_64_NUM 24
++
++__END_DECLS
++
++#endif /* elf.h */
++
+ #include "elfconfig.h"
+
+ #if KERNEL_ELFCLASS == ELFCLASS32
+@@ -155,3 +2601,4 @@
+ void fatal(const char *fmt, ...);
+ void warn(const char *fmt, ...);
+ void merror(const char *fmt, ...);
++
+diff -Nur linux-2.6.32.orig/scripts/mod/sumversion.c linux-2.6.32/scripts/mod/sumversion.c
+--- linux-2.6.32.orig/scripts/mod/sumversion.c Thu Dec 3 04:50:57 2009
++++ linux-2.6.32/scripts/mod/sumversion.c Sat Dec 19 12:01:07 2009
+@@ -1,4 +1,4 @@
+-#include <netinet/in.h>
++/* #include <netinet/in.h> */
+ #ifdef __sun__
+ #include <inttypes.h>
+ #else
diff --git a/target/linux/patches/2.6.33/cc-abstract.patch b/target/linux/patches/2.6.33/cc-abstract.patch
new file mode 100644
index 000000000..dc5d87f0d
--- /dev/null
+++ b/target/linux/patches/2.6.33/cc-abstract.patch
@@ -0,0 +1,14 @@
+diff -Nur linux-2.6.32.orig/Makefile linux-2.6.32/Makefile
+--- linux-2.6.32.orig/Makefile Thu Dec 3 04:50:57 2009
++++ linux-2.6.32/Makefile Fri Dec 18 20:53:57 2009
+@@ -219,8 +219,8 @@
+ else if [ -x /bin/bash ]; then echo /bin/bash; \
+ else echo sh; fi ; fi)
+
+-HOSTCC = gcc
+-HOSTCXX = g++
++HOSTCC ?= gcc
++HOSTCXX ?= g++
+ HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
+ HOSTCXXFLAGS = -O2
+
diff --git a/target/linux/patches/2.6.33/cris-initrd.patch b/target/linux/patches/2.6.33/cris-initrd.patch
new file mode 100644
index 000000000..47c034415
--- /dev/null
+++ b/target/linux/patches/2.6.33/cris-initrd.patch
@@ -0,0 +1,14 @@
+diff -Nur linux-2.6.31.4.orig/arch/cris/mm/init.c linux-2.6.31.4/arch/cris/mm/init.c
+--- linux-2.6.31.4.orig/arch/cris/mm/init.c 2009-10-12 22:15:40.000000000 +0200
++++ linux-2.6.31.4/arch/cris/mm/init.c 2009-10-25 12:59:24.418546156 +0100
+@@ -80,3 +80,10 @@
+ printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
+ (unsigned long)((&__init_end - &__init_begin) >> 10));
+ }
++
++#ifdef CONFIG_BLK_DEV_INITRD
++void free_initrd_mem(unsigned long start, unsigned long end)
++{
++ return 0;
++}
++#endif
diff --git a/target/linux/patches/2.6.33/cygwin-compat.patch b/target/linux/patches/2.6.33/cygwin-compat.patch
new file mode 100644
index 000000000..17258e565
--- /dev/null
+++ b/target/linux/patches/2.6.33/cygwin-compat.patch
@@ -0,0 +1,14 @@
+diff -Nur linux-2.6.30.orig/scripts/mod/file2alias.c linux-2.6.30/scripts/mod/file2alias.c
+--- linux-2.6.30.orig/scripts/mod/file2alias.c 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/scripts/mod/file2alias.c 2009-06-11 09:17:10.000000000 +0200
+@@ -29,7 +29,11 @@
+
+ #include <ctype.h>
+
++#ifdef __CYGWIN__
++typedef __uint32_t __u32;
++#else
+ typedef uint32_t __u32;
++#endif
+ typedef uint16_t __u16;
+ typedef unsigned char __u8;
diff --git a/target/linux/patches/2.6.33/exmap.patch b/target/linux/patches/2.6.33/exmap.patch
new file mode 100644
index 000000000..012e4794e
--- /dev/null
+++ b/target/linux/patches/2.6.33/exmap.patch
@@ -0,0 +1,11 @@
+diff -Nur linux-2.6.32.orig/kernel/pid.c linux-2.6.32/kernel/pid.c
+--- linux-2.6.32.orig/kernel/pid.c 2009-12-03 04:51:21.000000000 +0100
++++ linux-2.6.32/kernel/pid.c 2009-12-06 01:04:41.000000000 +0100
+@@ -387,6 +387,7 @@
+ {
+ return find_task_by_pid_ns(vnr, current->nsproxy->pid_ns);
+ }
++EXPORT_SYMBOL(find_task_by_vpid);
+
+ struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
+ {
diff --git a/target/linux/patches/2.6.33/freebsd-compat.patch b/target/linux/patches/2.6.33/freebsd-compat.patch
new file mode 100644
index 000000000..051fdc63e
--- /dev/null
+++ b/target/linux/patches/2.6.33/freebsd-compat.patch
@@ -0,0 +1,11 @@
+diff -Nur linux-2.6.30.orig/arch/x86/boot/tools/build.c linux-2.6.30/arch/x86/boot/tools/build.c
+--- linux-2.6.30.orig/arch/x86/boot/tools/build.c 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/arch/x86/boot/tools/build.c 2009-06-11 09:18:50.000000000 +0200
+@@ -29,7 +29,6 @@
+ #include <stdarg.h>
+ #include <sys/types.h>
+ #include <sys/stat.h>
+-#include <sys/sysmacros.h>
+ #include <unistd.h>
+ #include <fcntl.h>
+ #include <sys/mman.h>
diff --git a/target/linux/patches/2.6.33/mtd-root.patch b/target/linux/patches/2.6.33/mtd-root.patch
new file mode 100644
index 000000000..0317a0a3e
--- /dev/null
+++ b/target/linux/patches/2.6.33/mtd-root.patch
@@ -0,0 +1,62 @@
+diff -Nur linux-2.6.31.4.orig/drivers/mtd/Kconfig linux-2.6.31.4/drivers/mtd/Kconfig
+--- linux-2.6.31.4.orig/drivers/mtd/Kconfig 2009-10-12 22:15:40.000000000 +0200
++++ linux-2.6.31.4/drivers/mtd/Kconfig 2009-10-21 11:45:10.557679089 +0200
+@@ -53,6 +53,11 @@
+ should normally be compiled as kernel modules. The modules perform
+ various checks and verifications when loaded.
+
++config MTD_ROOTFS_ROOT_DEV
++ bool "Automatically set 'rootfs' partition to be root filesystem"
++ depends on MTD_PARTITIONS
++ default y
++
+ config MTD_REDBOOT_PARTS
+ tristate "RedBoot partition table parsing"
+ depends on MTD_PARTITIONS
+diff -Nur linux-2.6.31.4.orig/drivers/mtd/mtdpart.c linux-2.6.31.4/drivers/mtd/mtdpart.c
+--- linux-2.6.31.4.orig/drivers/mtd/mtdpart.c 2009-10-12 22:15:40.000000000 +0200
++++ linux-2.6.31.4/drivers/mtd/mtdpart.c 2009-10-21 11:46:39.593679219 +0200
+@@ -18,6 +18,7 @@
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
+ #include <linux/mtd/compatmac.h>
++#include <linux/root_dev.h>
+
+ /* Our partition linked list */
+ static LIST_HEAD(mtd_partitions);
+@@ -35,7 +36,7 @@
+ * the pointer to that structure with this macro.
+ */
+ #define PART(x) ((struct mtd_part *)(x))
+-
++#define IS_PART(mtd) (mtd->read == part_read)
+
+ /*
+ * MTD methods which simply translate the effective address and pass through
+@@ -517,14 +518,23 @@
+ {
+ struct mtd_part *slave;
+ uint64_t cur_offset = 0;
+- int i;
++ int i, j;
+
+ printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
+
+- for (i = 0; i < nbparts; i++) {
+- slave = add_one_partition(master, parts + i, i, cur_offset);
++ for (i = 0, j = 0; i < nbparts; i++) {
++ slave = add_one_partition(master, parts + i, j++, cur_offset);
+ if (!slave)
+ return -ENOMEM;
++ if (!strcmp(parts[i].name, "rootfs")) {
++#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
++ if (ROOT_DEV == 0) {
++ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
++ "set to be root filesystem\n");
++ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, slave->mtd.index);
++ }
++#endif
++ }
+ cur_offset = slave->offset + slave->mtd.size;
+ }
+
diff --git a/target/linux/patches/2.6.33/ocf.patch b/target/linux/patches/2.6.33/ocf.patch
new file mode 100644
index 000000000..64c5eeb0f
--- /dev/null
+++ b/target/linux/patches/2.6.33/ocf.patch
@@ -0,0 +1,23653 @@
+diff -Nur linux-2.6.30.orig/crypto/Kconfig linux-2.6.30/crypto/Kconfig
+--- linux-2.6.30.orig/crypto/Kconfig 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/crypto/Kconfig 2009-06-11 10:55:27.000000000 +0200
+@@ -781,3 +781,5 @@
+ source "drivers/crypto/Kconfig"
+
+ endif # if CRYPTO
++
++source "crypto/ocf/Kconfig"
+diff -Nur linux-2.6.30.orig/crypto/Makefile linux-2.6.30/crypto/Makefile
+--- linux-2.6.30.orig/crypto/Makefile 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/crypto/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -84,6 +84,8 @@
+ obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
+ obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
+
++obj-$(CONFIG_OCF_OCF) += ocf/
++
+ #
+ # generic algorithms and the async_tx api
+ #
+diff -Nur linux-2.6.30.orig/crypto/ocf/Config.in linux-2.6.30/crypto/ocf/Config.in
+--- linux-2.6.30.orig/crypto/ocf/Config.in 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/Config.in 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,34 @@
++#############################################################################
++
++mainmenu_option next_comment
++comment 'OCF Configuration'
++tristate 'OCF (Open Cryptograhic Framework)' CONFIG_OCF_OCF
++dep_mbool ' enable fips RNG checks (fips check on RNG data before use)' \
++ CONFIG_OCF_FIPS $CONFIG_OCF_OCF
++dep_mbool ' enable harvesting entropy for /dev/random' \
++ CONFIG_OCF_RANDOMHARVEST $CONFIG_OCF_OCF
++dep_tristate ' cryptodev (user space support)' \
++ CONFIG_OCF_CRYPTODEV $CONFIG_OCF_OCF
++dep_tristate ' cryptosoft (software crypto engine)' \
++ CONFIG_OCF_CRYPTOSOFT $CONFIG_OCF_OCF
++dep_tristate ' safenet (HW crypto engine)' \
++ CONFIG_OCF_SAFE $CONFIG_OCF_OCF
++dep_tristate ' IXP4xx (HW crypto engine)' \
++ CONFIG_OCF_IXP4XX $CONFIG_OCF_OCF
++dep_mbool ' Enable IXP4xx HW to perform SHA1 and MD5 hashing (very slow)' \
++ CONFIG_OCF_IXP4XX_SHA1_MD5 $CONFIG_OCF_IXP4XX
++dep_tristate ' hifn (HW crypto engine)' \
++ CONFIG_OCF_HIFN $CONFIG_OCF_OCF
++dep_tristate ' talitos (HW crypto engine)' \
++ CONFIG_OCF_TALITOS $CONFIG_OCF_OCF
++dep_tristate ' pasemi (HW crypto engine)' \
++ CONFIG_OCF_PASEMI $CONFIG_OCF_OCF
++dep_tristate ' ep80579 (HW crypto engine)' \
++ CONFIG_OCF_EP80579 $CONFIG_OCF_OCF
++dep_tristate ' ocfnull (does no crypto)' \
++ CONFIG_OCF_OCFNULL $CONFIG_OCF_OCF
++dep_tristate ' ocf-bench (HW crypto in-kernel benchmark)' \
++ CONFIG_OCF_BENCH $CONFIG_OCF_OCF
++endmenu
++
++#############################################################################
+diff -Nur linux-2.6.30.orig/crypto/ocf/criov.c linux-2.6.30/crypto/ocf/criov.c
+--- linux-2.6.30.orig/crypto/ocf/criov.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/criov.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,215 @@
++/* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */
++
++/*
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ * The license and original author are listed below.
++ *
++ * Copyright (c) 1999 Theo de Raadt
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++__FBSDID("$FreeBSD: src/sys/opencrypto/criov.c,v 1.5 2006/06/04 22:15:13 pjd Exp $");
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/uio.h>
++#include <linux/skbuff.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <asm/io.h>
++
++#include <uio.h>
++#include <cryptodev.h>
++
++/*
++ * This macro is only for avoiding code duplication, as we need to skip
++ * given number of bytes in the same way in three functions below.
++ */
++#define CUIO_SKIP() do { \
++ KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \
++ KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \
++ while (off > 0) { \
++ KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \
++ if (off < iov->iov_len) \
++ break; \
++ off -= iov->iov_len; \
++ iol--; \
++ iov++; \
++ } \
++} while (0)
++
++void
++cuio_copydata(struct uio* uio, int off, int len, caddr_t cp)
++{
++ struct iovec *iov = uio->uio_iov;
++ int iol = uio->uio_iovcnt;
++ unsigned count;
++
++ CUIO_SKIP();
++ while (len > 0) {
++ KASSERT(iol >= 0, ("%s: empty", __func__));
++ count = min((int)(iov->iov_len - off), len);
++ memcpy(cp, ((caddr_t)iov->iov_base) + off, count);
++ len -= count;
++ cp += count;
++ off = 0;
++ iol--;
++ iov++;
++ }
++}
++
++void
++cuio_copyback(struct uio* uio, int off, int len, caddr_t cp)
++{
++ struct iovec *iov = uio->uio_iov;
++ int iol = uio->uio_iovcnt;
++ unsigned count;
++
++ CUIO_SKIP();
++ while (len > 0) {
++ KASSERT(iol >= 0, ("%s: empty", __func__));
++ count = min((int)(iov->iov_len - off), len);
++ memcpy(((caddr_t)iov->iov_base) + off, cp, count);
++ len -= count;
++ cp += count;
++ off = 0;
++ iol--;
++ iov++;
++ }
++}
++
++/*
++ * Return a pointer to iov/offset of location in iovec list.
++ */
++struct iovec *
++cuio_getptr(struct uio *uio, int loc, int *off)
++{
++ struct iovec *iov = uio->uio_iov;
++ int iol = uio->uio_iovcnt;
++
++ while (loc >= 0) {
++ /* Normal end of search */
++ if (loc < iov->iov_len) {
++ *off = loc;
++ return (iov);
++ }
++
++ loc -= iov->iov_len;
++ if (iol == 0) {
++ if (loc == 0) {
++ /* Point at the end of valid data */
++ *off = iov->iov_len;
++ return (iov);
++ } else
++ return (NULL);
++ } else {
++ iov++, iol--;
++ }
++ }
++
++ return (NULL);
++}
++
++EXPORT_SYMBOL(cuio_copyback);
++EXPORT_SYMBOL(cuio_copydata);
++EXPORT_SYMBOL(cuio_getptr);
++
++
++static void
++skb_copy_bits_back(struct sk_buff *skb, int offset, caddr_t cp, int len)
++{
++ int i;
++ if (offset < skb_headlen(skb)) {
++ memcpy(skb->data + offset, cp, min_t(int, skb_headlen(skb), len));
++ len -= skb_headlen(skb);
++ cp += skb_headlen(skb);
++ }
++ offset -= skb_headlen(skb);
++ for (i = 0; len > 0 && i < skb_shinfo(skb)->nr_frags; i++) {
++ if (offset < skb_shinfo(skb)->frags[i].size) {
++ memcpy(page_address(skb_shinfo(skb)->frags[i].page) +
++ skb_shinfo(skb)->frags[i].page_offset,
++ cp, min_t(int, skb_shinfo(skb)->frags[i].size, len));
++ len -= skb_shinfo(skb)->frags[i].size;
++ cp += skb_shinfo(skb)->frags[i].size;
++ }
++ offset -= skb_shinfo(skb)->frags[i].size;
++ }
++}
++
++void
++crypto_copyback(int flags, caddr_t buf, int off, int size, caddr_t in)
++{
++
++ if ((flags & CRYPTO_F_SKBUF) != 0)
++ skb_copy_bits_back((struct sk_buff *)buf, off, in, size);
++ else if ((flags & CRYPTO_F_IOV) != 0)
++ cuio_copyback((struct uio *)buf, off, size, in);
++ else
++ bcopy(in, buf + off, size);
++}
++
++void
++crypto_copydata(int flags, caddr_t buf, int off, int size, caddr_t out)
++{
++
++ if ((flags & CRYPTO_F_SKBUF) != 0)
++ skb_copy_bits((struct sk_buff *)buf, off, out, size);
++ else if ((flags & CRYPTO_F_IOV) != 0)
++ cuio_copydata((struct uio *)buf, off, size, out);
++ else
++ bcopy(buf + off, out, size);
++}
++
++int
++crypto_apply(int flags, caddr_t buf, int off, int len,
++ int (*f)(void *, void *, u_int), void *arg)
++{
++#if 0
++ int error;
++
++ if ((flags & CRYPTO_F_SKBUF) != 0)
++ error = XXXXXX((struct mbuf *)buf, off, len, f, arg);
++ else if ((flags & CRYPTO_F_IOV) != 0)
++ error = cuio_apply((struct uio *)buf, off, len, f, arg);
++ else
++ error = (*f)(arg, buf + off, len);
++ return (error);
++#else
++ KASSERT(0, ("crypto_apply not implemented!\n"));
++#endif
++ return 0;
++}
++
++EXPORT_SYMBOL(crypto_copyback);
++EXPORT_SYMBOL(crypto_copydata);
++EXPORT_SYMBOL(crypto_apply);
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/crypto.c linux-2.6.30/crypto/ocf/crypto.c
+--- linux-2.6.30.orig/crypto/ocf/crypto.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/crypto.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1741 @@
++/*-
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ * The license and original author are listed below.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * Copyright (c) 2002-2006 Sam Leffler. All rights reserved.
++ *
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#if 0
++#include <sys/cdefs.h>
++__FBSDID("$FreeBSD: src/sys/opencrypto/crypto.c,v 1.27 2007/03/21 03:42:51 sam Exp $");
++#endif
++
++/*
++ * Cryptographic Subsystem.
++ *
++ * This code is derived from the Openbsd Cryptographic Framework (OCF)
++ * that has the copyright shown below. Very little of the original
++ * code remains.
++ */
++/*-
++ * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
++ *
++ * This code was written by Angelos D. Keromytis in Athens, Greece, in
++ * February 2000. Network Security Technologies Inc. (NSTI) kindly
++ * supported the development of this code.
++ *
++ * Copyright (c) 2000, 2001 Angelos D. Keromytis
++ *
++ * Permission to use, copy, and modify this software with or without fee
++ * is hereby granted, provided that this entire notice is included in
++ * all source code copies of any software which is or includes a copy or
++ * modification of this software.
++ *
++ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
++ * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
++ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
++ * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
++ * PURPOSE.
++ *
++__FBSDID("$FreeBSD: src/sys/opencrypto/crypto.c,v 1.16 2005/01/07 02:29:16 imp Exp $");
++ */
++
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/spinlock.h>
++#include <linux/version.h>
++#include <cryptodev.h>
++
++/*
++ * keep track of whether or not we have been initialised, a big
++ * issue if we are linked into the kernel and a driver gets started before
++ * us
++ */
++static int crypto_initted = 0;
++
++/*
++ * Crypto drivers register themselves by allocating a slot in the
++ * crypto_drivers table with crypto_get_driverid() and then registering
++ * each algorithm they support with crypto_register() and crypto_kregister().
++ */
++
++/*
++ * lock on driver table
++ * we track its state as spin_is_locked does not do anything on non-SMP boxes
++ */
++static spinlock_t crypto_drivers_lock;
++static int crypto_drivers_locked; /* for non-SMP boxes */
++
++#define CRYPTO_DRIVER_LOCK() \
++ ({ \
++ spin_lock_irqsave(&crypto_drivers_lock, d_flags); \
++ crypto_drivers_locked = 1; \
++ dprintk("%s,%d: DRIVER_LOCK()\n", __FILE__, __LINE__); \
++ })
++#define CRYPTO_DRIVER_UNLOCK() \
++ ({ \
++ dprintk("%s,%d: DRIVER_UNLOCK()\n", __FILE__, __LINE__); \
++ crypto_drivers_locked = 0; \
++ spin_unlock_irqrestore(&crypto_drivers_lock, d_flags); \
++ })
++#define CRYPTO_DRIVER_ASSERT() \
++ ({ \
++ if (!crypto_drivers_locked) { \
++ dprintk("%s,%d: DRIVER_ASSERT!\n", __FILE__, __LINE__); \
++ } \
++ })
++
++/*
++ * Crypto device/driver capabilities structure.
++ *
++ * Synchronization:
++ * (d) - protected by CRYPTO_DRIVER_LOCK()
++ * (q) - protected by CRYPTO_Q_LOCK()
++ * Not tagged fields are read-only.
++ */
++struct cryptocap {
++ device_t cc_dev; /* (d) device/driver */
++ u_int32_t cc_sessions; /* (d) # of sessions */
++ u_int32_t cc_koperations; /* (d) # os asym operations */
++ /*
++ * Largest possible operator length (in bits) for each type of
++ * encryption algorithm. XXX not used
++ */
++ u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1];
++ u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1];
++ u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1];
++
++ int cc_flags; /* (d) flags */
++#define CRYPTOCAP_F_CLEANUP 0x80000000 /* needs resource cleanup */
++ int cc_qblocked; /* (q) symmetric q blocked */
++ int cc_kqblocked; /* (q) asymmetric q blocked */
++};
++static struct cryptocap *crypto_drivers = NULL;
++static int crypto_drivers_num = 0;
++
++/*
++ * There are two queues for crypto requests; one for symmetric (e.g.
++ * cipher) operations and one for asymmetric (e.g. MOD)operations.
++ * A single mutex is used to lock access to both queues. We could
++ * have one per-queue but having one simplifies handling of block/unblock
++ * operations.
++ */
++static int crp_sleep = 0;
++static LIST_HEAD(crp_q); /* request queues */
++static LIST_HEAD(crp_kq);
++
++static spinlock_t crypto_q_lock;
++
++int crypto_all_qblocked = 0; /* protect with Q_LOCK */
++module_param(crypto_all_qblocked, int, 0444);
++MODULE_PARM_DESC(crypto_all_qblocked, "Are all crypto queues blocked");
++
++int crypto_all_kqblocked = 0; /* protect with Q_LOCK */
++module_param(crypto_all_kqblocked, int, 0444);
++MODULE_PARM_DESC(crypto_all_kqblocked, "Are all asym crypto queues blocked");
++
++#define CRYPTO_Q_LOCK() \
++ ({ \
++ spin_lock_irqsave(&crypto_q_lock, q_flags); \
++ dprintk("%s,%d: Q_LOCK()\n", __FILE__, __LINE__); \
++ })
++#define CRYPTO_Q_UNLOCK() \
++ ({ \
++ dprintk("%s,%d: Q_UNLOCK()\n", __FILE__, __LINE__); \
++ spin_unlock_irqrestore(&crypto_q_lock, q_flags); \
++ })
++
++/*
++ * There are two queues for processing completed crypto requests; one
++ * for the symmetric and one for the asymmetric ops. We only need one
++ * but have two to avoid type futzing (cryptop vs. cryptkop). A single
++ * mutex is used to lock access to both queues. Note that this lock
++ * must be separate from the lock on request queues to insure driver
++ * callbacks don't generate lock order reversals.
++ */
++static LIST_HEAD(crp_ret_q); /* callback queues */
++static LIST_HEAD(crp_ret_kq);
++
++static spinlock_t crypto_ret_q_lock;
++#define CRYPTO_RETQ_LOCK() \
++ ({ \
++ spin_lock_irqsave(&crypto_ret_q_lock, r_flags); \
++ dprintk("%s,%d: RETQ_LOCK\n", __FILE__, __LINE__); \
++ })
++#define CRYPTO_RETQ_UNLOCK() \
++ ({ \
++ dprintk("%s,%d: RETQ_UNLOCK\n", __FILE__, __LINE__); \
++ spin_unlock_irqrestore(&crypto_ret_q_lock, r_flags); \
++ })
++#define CRYPTO_RETQ_EMPTY() (list_empty(&crp_ret_q) && list_empty(&crp_ret_kq))
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
++static kmem_cache_t *cryptop_zone;
++static kmem_cache_t *cryptodesc_zone;
++#else
++static struct kmem_cache *cryptop_zone;
++static struct kmem_cache *cryptodesc_zone;
++#endif
++
++#define debug crypto_debug
++int crypto_debug = 0;
++module_param(crypto_debug, int, 0644);
++MODULE_PARM_DESC(crypto_debug, "Enable debug");
++EXPORT_SYMBOL(crypto_debug);
++
++/*
++ * Maximum number of outstanding crypto requests before we start
++ * failing requests. We need this to prevent DOS when too many
++ * requests are arriving for us to keep up. Otherwise we will
++ * run the system out of memory. Since crypto is slow, we are
++ * usually the bottleneck that needs to say, enough is enough.
++ *
++ * We cannot print errors when this condition occurs, we are already too
++ * slow, printing anything will just kill us
++ */
++
++static int crypto_q_cnt = 0;
++module_param(crypto_q_cnt, int, 0444);
++MODULE_PARM_DESC(crypto_q_cnt,
++ "Current number of outstanding crypto requests");
++
++static int crypto_q_max = 1000;
++module_param(crypto_q_max, int, 0644);
++MODULE_PARM_DESC(crypto_q_max,
++ "Maximum number of outstanding crypto requests");
++
++#define bootverbose crypto_verbose
++static int crypto_verbose = 0;
++module_param(crypto_verbose, int, 0644);
++MODULE_PARM_DESC(crypto_verbose,
++ "Enable verbose crypto startup");
++
++int crypto_usercrypto = 1; /* userland may do crypto reqs */
++module_param(crypto_usercrypto, int, 0644);
++MODULE_PARM_DESC(crypto_usercrypto,
++ "Enable/disable user-mode access to crypto support");
++
++int crypto_userasymcrypto = 1; /* userland may do asym crypto reqs */
++module_param(crypto_userasymcrypto, int, 0644);
++MODULE_PARM_DESC(crypto_userasymcrypto,
++ "Enable/disable user-mode access to asymmetric crypto support");
++
++int crypto_devallowsoft = 0; /* only use hardware crypto */
++module_param(crypto_devallowsoft, int, 0644);
++MODULE_PARM_DESC(crypto_devallowsoft,
++ "Enable/disable use of software crypto support");
++
++static pid_t cryptoproc = (pid_t) -1;
++static struct completion cryptoproc_exited;
++static DECLARE_WAIT_QUEUE_HEAD(cryptoproc_wait);
++static pid_t cryptoretproc = (pid_t) -1;
++static struct completion cryptoretproc_exited;
++static DECLARE_WAIT_QUEUE_HEAD(cryptoretproc_wait);
++
++static int crypto_proc(void *arg);
++static int crypto_ret_proc(void *arg);
++static int crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint);
++static int crypto_kinvoke(struct cryptkop *krp, int flags);
++static void crypto_exit(void);
++static int crypto_init(void);
++
++static struct cryptostats cryptostats;
++
++static struct cryptocap *
++crypto_checkdriver(u_int32_t hid)
++{
++ if (crypto_drivers == NULL)
++ return NULL;
++ return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]);
++}
++
++/*
++ * Compare a driver's list of supported algorithms against another
++ * list; return non-zero if all algorithms are supported.
++ */
++static int
++driver_suitable(const struct cryptocap *cap, const struct cryptoini *cri)
++{
++ const struct cryptoini *cr;
++
++ /* See if all the algorithms are supported. */
++ for (cr = cri; cr; cr = cr->cri_next)
++ if (cap->cc_alg[cr->cri_alg] == 0)
++ return 0;
++ return 1;
++}
++
++/*
++ * Select a driver for a new session that supports the specified
++ * algorithms and, optionally, is constrained according to the flags.
++ * The algorithm we use here is pretty stupid; just use the
++ * first driver that supports all the algorithms we need. If there
++ * are multiple drivers we choose the driver with the fewest active
++ * sessions. We prefer hardware-backed drivers to software ones.
++ *
++ * XXX We need more smarts here (in real life too, but that's
++ * XXX another story altogether).
++ */
++static struct cryptocap *
++crypto_select_driver(const struct cryptoini *cri, int flags)
++{
++ struct cryptocap *cap, *best;
++ int match, hid;
++
++ CRYPTO_DRIVER_ASSERT();
++
++ /*
++ * Look first for hardware crypto devices if permitted.
++ */
++ if (flags & CRYPTOCAP_F_HARDWARE)
++ match = CRYPTOCAP_F_HARDWARE;
++ else
++ match = CRYPTOCAP_F_SOFTWARE;
++ best = NULL;
++again:
++ for (hid = 0; hid < crypto_drivers_num; hid++) {
++ cap = &crypto_drivers[hid];
++ /*
++ * If it's not initialized, is in the process of
++ * going away, or is not appropriate (hardware
++ * or software based on match), then skip.
++ */
++ if (cap->cc_dev == NULL ||
++ (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
++ (cap->cc_flags & match) == 0)
++ continue;
++
++ /* verify all the algorithms are supported. */
++ if (driver_suitable(cap, cri)) {
++ if (best == NULL ||
++ cap->cc_sessions < best->cc_sessions)
++ best = cap;
++ }
++ }
++ if (best != NULL)
++ return best;
++ if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
++ /* sort of an Algol 68-style for loop */
++ match = CRYPTOCAP_F_SOFTWARE;
++ goto again;
++ }
++ return best;
++}
++
++/*
++ * Create a new session. The crid argument specifies a crypto
++ * driver to use or constraints on a driver to select (hardware
++ * only, software only, either). Whatever driver is selected
++ * must be capable of the requested crypto algorithms.
++ */
++int
++crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int crid)
++{
++ struct cryptocap *cap;
++ u_int32_t hid, lid;
++ int err;
++ unsigned long d_flags;
++
++ CRYPTO_DRIVER_LOCK();
++ if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
++ /*
++ * Use specified driver; verify it is capable.
++ */
++ cap = crypto_checkdriver(crid);
++ if (cap != NULL && !driver_suitable(cap, cri))
++ cap = NULL;
++ } else {
++ /*
++ * No requested driver; select based on crid flags.
++ */
++ cap = crypto_select_driver(cri, crid);
++ /*
++ * if NULL then can't do everything in one session.
++ * XXX Fix this. We need to inject a "virtual" session
++ * XXX layer right about here.
++ */
++ }
++ if (cap != NULL) {
++ /* Call the driver initialization routine. */
++ hid = cap - crypto_drivers;
++ lid = hid; /* Pass the driver ID. */
++ cap->cc_sessions++;
++ CRYPTO_DRIVER_UNLOCK();
++ err = CRYPTODEV_NEWSESSION(cap->cc_dev, &lid, cri);
++ CRYPTO_DRIVER_LOCK();
++ if (err == 0) {
++ (*sid) = (cap->cc_flags & 0xff000000)
++ | (hid & 0x00ffffff);
++ (*sid) <<= 32;
++ (*sid) |= (lid & 0xffffffff);
++ } else
++ cap->cc_sessions--;
++ } else
++ err = EINVAL;
++ CRYPTO_DRIVER_UNLOCK();
++ return err;
++}
++
++static void
++crypto_remove(struct cryptocap *cap)
++{
++ CRYPTO_DRIVER_ASSERT();
++ if (cap->cc_sessions == 0 && cap->cc_koperations == 0)
++ bzero(cap, sizeof(*cap));
++}
++
++/*
++ * Delete an existing session (or a reserved session on an unregistered
++ * driver).
++ */
++int
++crypto_freesession(u_int64_t sid)
++{
++ struct cryptocap *cap;
++ u_int32_t hid;
++ int err = 0;
++ unsigned long d_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++ CRYPTO_DRIVER_LOCK();
++
++ if (crypto_drivers == NULL) {
++ err = EINVAL;
++ goto done;
++ }
++
++ /* Determine two IDs. */
++ hid = CRYPTO_SESID2HID(sid);
++
++ if (hid >= crypto_drivers_num) {
++ dprintk("%s - INVALID DRIVER NUM %d\n", __FUNCTION__, hid);
++ err = ENOENT;
++ goto done;
++ }
++ cap = &crypto_drivers[hid];
++
++ if (cap->cc_dev) {
++ CRYPTO_DRIVER_UNLOCK();
++ /* Call the driver cleanup routine, if available, unlocked. */
++ err = CRYPTODEV_FREESESSION(cap->cc_dev, sid);
++ CRYPTO_DRIVER_LOCK();
++ }
++
++ if (cap->cc_sessions)
++ cap->cc_sessions--;
++
++ if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
++ crypto_remove(cap);
++
++done:
++ CRYPTO_DRIVER_UNLOCK();
++ return err;
++}
++
++/*
++ * Return an unused driver id. Used by drivers prior to registering
++ * support for the algorithms they handle.
++ */
++int32_t
++crypto_get_driverid(device_t dev, int flags)
++{
++ struct cryptocap *newdrv;
++ int i;
++ unsigned long d_flags;
++
++ if ((flags & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
++ printf("%s: no flags specified when registering driver\n",
++ device_get_nameunit(dev));
++ return -1;
++ }
++
++ CRYPTO_DRIVER_LOCK();
++
++ for (i = 0; i < crypto_drivers_num; i++) {
++ if (crypto_drivers[i].cc_dev == NULL &&
++ (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP) == 0) {
++ break;
++ }
++ }
++
++ /* Out of entries, allocate some more. */
++ if (i == crypto_drivers_num) {
++ /* Be careful about wrap-around. */
++ if (2 * crypto_drivers_num <= crypto_drivers_num) {
++ CRYPTO_DRIVER_UNLOCK();
++ printk("crypto: driver count wraparound!\n");
++ return -1;
++ }
++
++ newdrv = kmalloc(2 * crypto_drivers_num * sizeof(struct cryptocap),
++ GFP_KERNEL);
++ if (newdrv == NULL) {
++ CRYPTO_DRIVER_UNLOCK();
++ printk("crypto: no space to expand driver table!\n");
++ return -1;
++ }
++
++ memcpy(newdrv, crypto_drivers,
++ crypto_drivers_num * sizeof(struct cryptocap));
++ memset(&newdrv[crypto_drivers_num], 0,
++ crypto_drivers_num * sizeof(struct cryptocap));
++
++ crypto_drivers_num *= 2;
++
++ kfree(crypto_drivers);
++ crypto_drivers = newdrv;
++ }
++
++ /* NB: state is zero'd on free */
++ crypto_drivers[i].cc_sessions = 1; /* Mark */
++ crypto_drivers[i].cc_dev = dev;
++ crypto_drivers[i].cc_flags = flags;
++ if (bootverbose)
++ printf("crypto: assign %s driver id %u, flags %u\n",
++ device_get_nameunit(dev), i, flags);
++
++ CRYPTO_DRIVER_UNLOCK();
++
++ return i;
++}
++
++/*
++ * Lookup a driver by name. We match against the full device
++ * name and unit, and against just the name. The latter gives
++ * us a simple widlcarding by device name. On success return the
++ * driver/hardware identifier; otherwise return -1.
++ */
++int
++crypto_find_driver(const char *match)
++{
++ int i, len = strlen(match);
++ unsigned long d_flags;
++
++ CRYPTO_DRIVER_LOCK();
++ for (i = 0; i < crypto_drivers_num; i++) {
++ device_t dev = crypto_drivers[i].cc_dev;
++ if (dev == NULL ||
++ (crypto_drivers[i].cc_flags & CRYPTOCAP_F_CLEANUP))
++ continue;
++ if (strncmp(match, device_get_nameunit(dev), len) == 0 ||
++ strncmp(match, device_get_name(dev), len) == 0)
++ break;
++ }
++ CRYPTO_DRIVER_UNLOCK();
++ return i < crypto_drivers_num ? i : -1;
++}
++
++/*
++ * Return the device_t for the specified driver or NULL
++ * if the driver identifier is invalid.
++ */
++device_t
++crypto_find_device_byhid(int hid)
++{
++ struct cryptocap *cap = crypto_checkdriver(hid);
++ return cap != NULL ? cap->cc_dev : NULL;
++}
++
++/*
++ * Return the device/driver capabilities.
++ */
++int
++crypto_getcaps(int hid)
++{
++ struct cryptocap *cap = crypto_checkdriver(hid);
++ return cap != NULL ? cap->cc_flags : 0;
++}
++
++/*
++ * Register support for a key-related algorithm. This routine
++ * is called once for each algorithm supported a driver.
++ */
++int
++crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags)
++{
++ struct cryptocap *cap;
++ int err;
++ unsigned long d_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++ CRYPTO_DRIVER_LOCK();
++
++ cap = crypto_checkdriver(driverid);
++ if (cap != NULL &&
++ (CRK_ALGORITM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) {
++ /*
++ * XXX Do some performance testing to determine placing.
++ * XXX We probably need an auxiliary data structure that
++ * XXX describes relative performances.
++ */
++
++ cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
++ if (bootverbose)
++ printf("crypto: %s registers key alg %u flags %u\n"
++ , device_get_nameunit(cap->cc_dev)
++ , kalg
++ , flags
++ );
++ err = 0;
++ } else
++ err = EINVAL;
++
++ CRYPTO_DRIVER_UNLOCK();
++ return err;
++}
++
++/*
++ * Register support for a non-key-related algorithm. This routine
++ * is called once for each such algorithm supported by a driver.
++ */
++int
++crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
++ u_int32_t flags)
++{
++ struct cryptocap *cap;
++ int err;
++ unsigned long d_flags;
++
++ dprintk("%s(id=0x%x, alg=%d, maxoplen=%d, flags=0x%x)\n", __FUNCTION__,
++ driverid, alg, maxoplen, flags);
++
++ CRYPTO_DRIVER_LOCK();
++
++ cap = crypto_checkdriver(driverid);
++ /* NB: algorithms are in the range [1..max] */
++ if (cap != NULL &&
++ (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX)) {
++ /*
++ * XXX Do some performance testing to determine placing.
++ * XXX We probably need an auxiliary data structure that
++ * XXX describes relative performances.
++ */
++
++ cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED;
++ cap->cc_max_op_len[alg] = maxoplen;
++ if (bootverbose)
++ printf("crypto: %s registers alg %u flags %u maxoplen %u\n"
++ , device_get_nameunit(cap->cc_dev)
++ , alg
++ , flags
++ , maxoplen
++ );
++ cap->cc_sessions = 0; /* Unmark */
++ err = 0;
++ } else
++ err = EINVAL;
++
++ CRYPTO_DRIVER_UNLOCK();
++ return err;
++}
++
++static void
++driver_finis(struct cryptocap *cap)
++{
++ u_int32_t ses, kops;
++
++ CRYPTO_DRIVER_ASSERT();
++
++ ses = cap->cc_sessions;
++ kops = cap->cc_koperations;
++ bzero(cap, sizeof(*cap));
++ if (ses != 0 || kops != 0) {
++ /*
++ * If there are pending sessions,
++ * just mark as invalid.
++ */
++ cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
++ cap->cc_sessions = ses;
++ cap->cc_koperations = kops;
++ }
++}
++
++/*
++ * Unregister a crypto driver. If there are pending sessions using it,
++ * leave enough information around so that subsequent calls using those
++ * sessions will correctly detect the driver has been unregistered and
++ * reroute requests.
++ */
++int
++crypto_unregister(u_int32_t driverid, int alg)
++{
++ struct cryptocap *cap;
++ int i, err;
++ unsigned long d_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++ CRYPTO_DRIVER_LOCK();
++
++ cap = crypto_checkdriver(driverid);
++ if (cap != NULL &&
++ (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) &&
++ cap->cc_alg[alg] != 0) {
++ cap->cc_alg[alg] = 0;
++ cap->cc_max_op_len[alg] = 0;
++
++ /* Was this the last algorithm ? */
++ for (i = 1; i <= CRYPTO_ALGORITHM_MAX; i++)
++ if (cap->cc_alg[i] != 0)
++ break;
++
++ if (i == CRYPTO_ALGORITHM_MAX + 1)
++ driver_finis(cap);
++ err = 0;
++ } else
++ err = EINVAL;
++ CRYPTO_DRIVER_UNLOCK();
++ return err;
++}
++
++/*
++ * Unregister all algorithms associated with a crypto driver.
++ * If there are pending sessions using it, leave enough information
++ * around so that subsequent calls using those sessions will
++ * correctly detect the driver has been unregistered and reroute
++ * requests.
++ */
++int
++crypto_unregister_all(u_int32_t driverid)
++{
++ struct cryptocap *cap;
++ int err;
++ unsigned long d_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++ CRYPTO_DRIVER_LOCK();
++ cap = crypto_checkdriver(driverid);
++ if (cap != NULL) {
++ driver_finis(cap);
++ err = 0;
++ } else
++ err = EINVAL;
++ CRYPTO_DRIVER_UNLOCK();
++
++ return err;
++}
++
++/*
++ * Clear blockage on a driver. The what parameter indicates whether
++ * the driver is now ready for cryptop's and/or cryptokop's.
++ */
++int
++crypto_unblock(u_int32_t driverid, int what)
++{
++ struct cryptocap *cap;
++ int err;
++ unsigned long q_flags;
++
++ CRYPTO_Q_LOCK();
++ cap = crypto_checkdriver(driverid);
++ if (cap != NULL) {
++ if (what & CRYPTO_SYMQ) {
++ cap->cc_qblocked = 0;
++ crypto_all_qblocked = 0;
++ }
++ if (what & CRYPTO_ASYMQ) {
++ cap->cc_kqblocked = 0;
++ crypto_all_kqblocked = 0;
++ }
++ if (crp_sleep)
++ wake_up_interruptible(&cryptoproc_wait);
++ err = 0;
++ } else
++ err = EINVAL;
++ CRYPTO_Q_UNLOCK(); //DAVIDM should this be a driver lock
++
++ return err;
++}
++
++/*
++ * Add a crypto request to a queue, to be processed by the kernel thread.
++ */
++int
++crypto_dispatch(struct cryptop *crp)
++{
++ struct cryptocap *cap;
++ int result = -1;
++ unsigned long q_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ cryptostats.cs_ops++;
++
++ CRYPTO_Q_LOCK();
++ if (crypto_q_cnt >= crypto_q_max) {
++ CRYPTO_Q_UNLOCK();
++ cryptostats.cs_drops++;
++ return ENOMEM;
++ }
++ crypto_q_cnt++;
++
++ /*
++ * Caller marked the request to be processed immediately; dispatch
++ * it directly to the driver unless the driver is currently blocked.
++ */
++ if ((crp->crp_flags & CRYPTO_F_BATCH) == 0) {
++ int hid = CRYPTO_SESID2HID(crp->crp_sid);
++ cap = crypto_checkdriver(hid);
++ /* Driver cannot disappear when there is an active session. */
++ KASSERT(cap != NULL, ("%s: Driver disappeared.", __func__));
++ if (!cap->cc_qblocked) {
++ crypto_all_qblocked = 0;
++ crypto_drivers[hid].cc_qblocked = 1;
++ CRYPTO_Q_UNLOCK();
++ result = crypto_invoke(cap, crp, 0);
++ CRYPTO_Q_LOCK();
++ if (result != ERESTART)
++ crypto_drivers[hid].cc_qblocked = 0;
++ }
++ }
++ if (result == ERESTART) {
++ /*
++ * The driver ran out of resources, mark the
++ * driver ``blocked'' for cryptop's and put
++ * the request back in the queue. It would
++ * best to put the request back where we got
++ * it but that's hard so for now we put it
++ * at the front. This should be ok; putting
++ * it at the end does not work.
++ */
++ list_add(&crp->crp_next, &crp_q);
++ cryptostats.cs_blocks++;
++ } else if (result == -1) {
++ TAILQ_INSERT_TAIL(&crp_q, crp, crp_next);
++ }
++ if (crp_sleep)
++ wake_up_interruptible(&cryptoproc_wait);
++ CRYPTO_Q_UNLOCK();
++ return 0;
++}
++
++/*
++ * Add an asymetric crypto request to a queue,
++ * to be processed by the kernel thread.
++ */
++int
++crypto_kdispatch(struct cryptkop *krp)
++{
++ int error;
++ unsigned long q_flags;
++
++ cryptostats.cs_kops++;
++
++ error = crypto_kinvoke(krp, krp->krp_crid);
++ if (error == ERESTART) {
++ CRYPTO_Q_LOCK();
++ TAILQ_INSERT_TAIL(&crp_kq, krp, krp_next);
++ if (crp_sleep)
++ wake_up_interruptible(&cryptoproc_wait);
++ CRYPTO_Q_UNLOCK();
++ error = 0;
++ }
++ return error;
++}
++
++/*
++ * Verify a driver is suitable for the specified operation.
++ */
++static __inline int
++kdriver_suitable(const struct cryptocap *cap, const struct cryptkop *krp)
++{
++ return (cap->cc_kalg[krp->krp_op] & CRYPTO_ALG_FLAG_SUPPORTED) != 0;
++}
++
++/*
++ * Select a driver for an asym operation. The driver must
++ * support the necessary algorithm. The caller can constrain
++ * which device is selected with the flags parameter. The
++ * algorithm we use here is pretty stupid; just use the first
++ * driver that supports the algorithms we need. If there are
++ * multiple suitable drivers we choose the driver with the
++ * fewest active operations. We prefer hardware-backed
++ * drivers to software ones when either may be used.
++ */
++static struct cryptocap *
++crypto_select_kdriver(const struct cryptkop *krp, int flags)
++{
++ struct cryptocap *cap, *best, *blocked;
++ int match, hid;
++
++ CRYPTO_DRIVER_ASSERT();
++
++ /*
++ * Look first for hardware crypto devices if permitted.
++ */
++ if (flags & CRYPTOCAP_F_HARDWARE)
++ match = CRYPTOCAP_F_HARDWARE;
++ else
++ match = CRYPTOCAP_F_SOFTWARE;
++ best = NULL;
++ blocked = NULL;
++again:
++ for (hid = 0; hid < crypto_drivers_num; hid++) {
++ cap = &crypto_drivers[hid];
++ /*
++ * If it's not initialized, is in the process of
++ * going away, or is not appropriate (hardware
++ * or software based on match), then skip.
++ */
++ if (cap->cc_dev == NULL ||
++ (cap->cc_flags & CRYPTOCAP_F_CLEANUP) ||
++ (cap->cc_flags & match) == 0)
++ continue;
++
++ /* verify all the algorithms are supported. */
++ if (kdriver_suitable(cap, krp)) {
++ if (best == NULL ||
++ cap->cc_koperations < best->cc_koperations)
++ best = cap;
++ }
++ }
++ if (best != NULL)
++ return best;
++ if (match == CRYPTOCAP_F_HARDWARE && (flags & CRYPTOCAP_F_SOFTWARE)) {
++ /* sort of an Algol 68-style for loop */
++ match = CRYPTOCAP_F_SOFTWARE;
++ goto again;
++ }
++ return best;
++}
++
++/*
++ * Dispatch an assymetric crypto request.
++ */
++static int
++crypto_kinvoke(struct cryptkop *krp, int crid)
++{
++ struct cryptocap *cap = NULL;
++ int error;
++ unsigned long d_flags;
++
++ KASSERT(krp != NULL, ("%s: krp == NULL", __func__));
++ KASSERT(krp->krp_callback != NULL,
++ ("%s: krp->crp_callback == NULL", __func__));
++
++ CRYPTO_DRIVER_LOCK();
++ if ((crid & (CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE)) == 0) {
++ cap = crypto_checkdriver(crid);
++ if (cap != NULL) {
++ /*
++ * Driver present, it must support the necessary
++ * algorithm and, if s/w drivers are excluded,
++ * it must be registered as hardware-backed.
++ */
++ if (!kdriver_suitable(cap, krp) ||
++ (!crypto_devallowsoft &&
++ (cap->cc_flags & CRYPTOCAP_F_HARDWARE) == 0))
++ cap = NULL;
++ }
++ } else {
++ /*
++ * No requested driver; select based on crid flags.
++ */
++ if (!crypto_devallowsoft) /* NB: disallow s/w drivers */
++ crid &= ~CRYPTOCAP_F_SOFTWARE;
++ cap = crypto_select_kdriver(krp, crid);
++ }
++ if (cap != NULL && !cap->cc_kqblocked) {
++ krp->krp_hid = cap - crypto_drivers;
++ cap->cc_koperations++;
++ CRYPTO_DRIVER_UNLOCK();
++ error = CRYPTODEV_KPROCESS(cap->cc_dev, krp, 0);
++ CRYPTO_DRIVER_LOCK();
++ if (error == ERESTART) {
++ cap->cc_koperations--;
++ CRYPTO_DRIVER_UNLOCK();
++ return (error);
++ }
++ /* return the actual device used */
++ krp->krp_crid = krp->krp_hid;
++ } else {
++ /*
++ * NB: cap is !NULL if device is blocked; in
++ * that case return ERESTART so the operation
++ * is resubmitted if possible.
++ */
++ error = (cap == NULL) ? ENODEV : ERESTART;
++ }
++ CRYPTO_DRIVER_UNLOCK();
++
++ if (error) {
++ krp->krp_status = error;
++ crypto_kdone(krp);
++ }
++ return 0;
++}
++
++
++/*
++ * Dispatch a crypto request to the appropriate crypto devices.
++ */
++static int
++crypto_invoke(struct cryptocap *cap, struct cryptop *crp, int hint)
++{
++ KASSERT(crp != NULL, ("%s: crp == NULL", __func__));
++ KASSERT(crp->crp_callback != NULL,
++ ("%s: crp->crp_callback == NULL", __func__));
++ KASSERT(crp->crp_desc != NULL, ("%s: crp->crp_desc == NULL", __func__));
++
++ dprintk("%s()\n", __FUNCTION__);
++
++#ifdef CRYPTO_TIMING
++ if (crypto_timing)
++ crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp);
++#endif
++ if (cap->cc_flags & CRYPTOCAP_F_CLEANUP) {
++ struct cryptodesc *crd;
++ u_int64_t nid;
++
++ /*
++ * Driver has unregistered; migrate the session and return
++ * an error to the caller so they'll resubmit the op.
++ *
++ * XXX: What if there are more already queued requests for this
++ * session?
++ */
++ crypto_freesession(crp->crp_sid);
++
++ for (crd = crp->crp_desc; crd->crd_next; crd = crd->crd_next)
++ crd->CRD_INI.cri_next = &(crd->crd_next->CRD_INI);
++
++ /* XXX propagate flags from initial session? */
++ if (crypto_newsession(&nid, &(crp->crp_desc->CRD_INI),
++ CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE) == 0)
++ crp->crp_sid = nid;
++
++ crp->crp_etype = EAGAIN;
++ crypto_done(crp);
++ return 0;
++ } else {
++ /*
++ * Invoke the driver to process the request.
++ */
++ return CRYPTODEV_PROCESS(cap->cc_dev, crp, hint);
++ }
++}
++
++/*
++ * Release a set of crypto descriptors.
++ */
++void
++crypto_freereq(struct cryptop *crp)
++{
++ struct cryptodesc *crd;
++
++ if (crp == NULL)
++ return;
++
++#ifdef DIAGNOSTIC
++ {
++ struct cryptop *crp2;
++ unsigned long q_flags;
++
++ CRYPTO_Q_LOCK();
++ TAILQ_FOREACH(crp2, &crp_q, crp_next) {
++ KASSERT(crp2 != crp,
++ ("Freeing cryptop from the crypto queue (%p).",
++ crp));
++ }
++ CRYPTO_Q_UNLOCK();
++ CRYPTO_RETQ_LOCK();
++ TAILQ_FOREACH(crp2, &crp_ret_q, crp_next) {
++ KASSERT(crp2 != crp,
++ ("Freeing cryptop from the return queue (%p).",
++ crp));
++ }
++ CRYPTO_RETQ_UNLOCK();
++ }
++#endif
++
++ while ((crd = crp->crp_desc) != NULL) {
++ crp->crp_desc = crd->crd_next;
++ kmem_cache_free(cryptodesc_zone, crd);
++ }
++ kmem_cache_free(cryptop_zone, crp);
++}
++
++/*
++ * Acquire a set of crypto descriptors.
++ */
++struct cryptop *
++crypto_getreq(int num)
++{
++ struct cryptodesc *crd;
++ struct cryptop *crp;
++
++ crp = kmem_cache_alloc(cryptop_zone, SLAB_ATOMIC);
++ if (crp != NULL) {
++ memset(crp, 0, sizeof(*crp));
++ INIT_LIST_HEAD(&crp->crp_next);
++ init_waitqueue_head(&crp->crp_waitq);
++ while (num--) {
++ crd = kmem_cache_alloc(cryptodesc_zone, SLAB_ATOMIC);
++ if (crd == NULL) {
++ crypto_freereq(crp);
++ return NULL;
++ }
++ memset(crd, 0, sizeof(*crd));
++ crd->crd_next = crp->crp_desc;
++ crp->crp_desc = crd;
++ }
++ }
++ return crp;
++}
++
++/*
++ * Invoke the callback on behalf of the driver.
++ */
++void
++crypto_done(struct cryptop *crp)
++{
++ unsigned long q_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if ((crp->crp_flags & CRYPTO_F_DONE) == 0) {
++ crp->crp_flags |= CRYPTO_F_DONE;
++ CRYPTO_Q_LOCK();
++ crypto_q_cnt--;
++ CRYPTO_Q_UNLOCK();
++ } else
++ printk("crypto: crypto_done op already done, flags 0x%x",
++ crp->crp_flags);
++ if (crp->crp_etype != 0)
++ cryptostats.cs_errs++;
++ /*
++ * CBIMM means unconditionally do the callback immediately;
++ * CBIFSYNC means do the callback immediately only if the
++ * operation was done synchronously. Both are used to avoid
++ * doing extraneous context switches; the latter is mostly
++ * used with the software crypto driver.
++ */
++ if ((crp->crp_flags & CRYPTO_F_CBIMM) ||
++ ((crp->crp_flags & CRYPTO_F_CBIFSYNC) &&
++ (CRYPTO_SESID2CAPS(crp->crp_sid) & CRYPTOCAP_F_SYNC))) {
++ /*
++ * Do the callback directly. This is ok when the
++ * callback routine does very little (e.g. the
++ * /dev/crypto callback method just does a wakeup).
++ */
++ crp->crp_callback(crp);
++ } else {
++ unsigned long r_flags;
++ /*
++ * Normal case; queue the callback for the thread.
++ */
++ CRYPTO_RETQ_LOCK();
++ if (CRYPTO_RETQ_EMPTY())
++ wake_up_interruptible(&cryptoretproc_wait);/* shared wait channel */
++ TAILQ_INSERT_TAIL(&crp_ret_q, crp, crp_next);
++ CRYPTO_RETQ_UNLOCK();
++ }
++}
++
++/*
++ * Invoke the callback on behalf of the driver.
++ */
++void
++crypto_kdone(struct cryptkop *krp)
++{
++ struct cryptocap *cap;
++ unsigned long d_flags;
++
++ if ((krp->krp_flags & CRYPTO_KF_DONE) != 0)
++ printk("crypto: crypto_kdone op already done, flags 0x%x",
++ krp->krp_flags);
++ krp->krp_flags |= CRYPTO_KF_DONE;
++ if (krp->krp_status != 0)
++ cryptostats.cs_kerrs++;
++
++ CRYPTO_DRIVER_LOCK();
++ /* XXX: What if driver is loaded in the meantime? */
++ if (krp->krp_hid < crypto_drivers_num) {
++ cap = &crypto_drivers[krp->krp_hid];
++ cap->cc_koperations--;
++ KASSERT(cap->cc_koperations >= 0, ("cc_koperations < 0"));
++ if (cap->cc_flags & CRYPTOCAP_F_CLEANUP)
++ crypto_remove(cap);
++ }
++ CRYPTO_DRIVER_UNLOCK();
++
++ /*
++ * CBIMM means unconditionally do the callback immediately;
++ * This is used to avoid doing extraneous context switches
++ */
++ if ((krp->krp_flags & CRYPTO_KF_CBIMM)) {
++ /*
++ * Do the callback directly. This is ok when the
++ * callback routine does very little (e.g. the
++ * /dev/crypto callback method just does a wakeup).
++ */
++ krp->krp_callback(krp);
++ } else {
++ unsigned long r_flags;
++ /*
++ * Normal case; queue the callback for the thread.
++ */
++ CRYPTO_RETQ_LOCK();
++ if (CRYPTO_RETQ_EMPTY())
++ wake_up_interruptible(&cryptoretproc_wait);/* shared wait channel */
++ TAILQ_INSERT_TAIL(&crp_ret_kq, krp, krp_next);
++ CRYPTO_RETQ_UNLOCK();
++ }
++}
++
++int
++crypto_getfeat(int *featp)
++{
++ int hid, kalg, feat = 0;
++ unsigned long d_flags;
++
++ CRYPTO_DRIVER_LOCK();
++ for (hid = 0; hid < crypto_drivers_num; hid++) {
++ const struct cryptocap *cap = &crypto_drivers[hid];
++
++ if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) &&
++ !crypto_devallowsoft) {
++ continue;
++ }
++ for (kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++)
++ if (cap->cc_kalg[kalg] & CRYPTO_ALG_FLAG_SUPPORTED)
++ feat |= 1 << kalg;
++ }
++ CRYPTO_DRIVER_UNLOCK();
++ *featp = feat;
++ return (0);
++}
++
++/*
++ * Crypto thread, dispatches crypto requests.
++ */
++static int
++crypto_proc(void *arg)
++{
++ struct cryptop *crp, *submit;
++ struct cryptkop *krp, *krpp;
++ struct cryptocap *cap;
++ u_int32_t hid;
++ int result, hint;
++ unsigned long q_flags;
++
++ ocf_daemonize("crypto");
++
++ CRYPTO_Q_LOCK();
++ for (;;) {
++ /*
++ * we need to make sure we don't get into a busy loop with nothing
++ * to do, the two crypto_all_*blocked vars help us find out when
++ * we are all full and can do nothing on any driver or Q. If so we
++ * wait for an unblock.
++ */
++ crypto_all_qblocked = !list_empty(&crp_q);
++
++ /*
++ * Find the first element in the queue that can be
++ * processed and look-ahead to see if multiple ops
++ * are ready for the same driver.
++ */
++ submit = NULL;
++ hint = 0;
++ list_for_each_entry(crp, &crp_q, crp_next) {
++ hid = CRYPTO_SESID2HID(crp->crp_sid);
++ cap = crypto_checkdriver(hid);
++ /*
++ * Driver cannot disappear when there is an active
++ * session.
++ */
++ KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
++ __func__, __LINE__));
++ if (cap == NULL || cap->cc_dev == NULL) {
++ /* Op needs to be migrated, process it. */
++ if (submit == NULL)
++ submit = crp;
++ break;
++ }
++ if (!cap->cc_qblocked) {
++ if (submit != NULL) {
++ /*
++ * We stop on finding another op,
++ * regardless whether its for the same
++ * driver or not. We could keep
++ * searching the queue but it might be
++ * better to just use a per-driver
++ * queue instead.
++ */
++ if (CRYPTO_SESID2HID(submit->crp_sid) == hid)
++ hint = CRYPTO_HINT_MORE;
++ break;
++ } else {
++ submit = crp;
++ if ((submit->crp_flags & CRYPTO_F_BATCH) == 0)
++ break;
++ /* keep scanning for more are q'd */
++ }
++ }
++ }
++ if (submit != NULL) {
++ hid = CRYPTO_SESID2HID(submit->crp_sid);
++ crypto_all_qblocked = 0;
++ list_del(&submit->crp_next);
++ crypto_drivers[hid].cc_qblocked = 1;
++ cap = crypto_checkdriver(hid);
++ CRYPTO_Q_UNLOCK();
++ KASSERT(cap != NULL, ("%s:%u Driver disappeared.",
++ __func__, __LINE__));
++ result = crypto_invoke(cap, submit, hint);
++ CRYPTO_Q_LOCK();
++ if (result == ERESTART) {
++ /*
++ * The driver ran out of resources, mark the
++ * driver ``blocked'' for cryptop's and put
++ * the request back in the queue. It would
++ * best to put the request back where we got
++ * it but that's hard so for now we put it
++ * at the front. This should be ok; putting
++ * it at the end does not work.
++ */
++ /* XXX validate sid again? */
++ list_add(&submit->crp_next, &crp_q);
++ cryptostats.cs_blocks++;
++ } else
++ crypto_drivers[hid].cc_qblocked=0;
++ }
++
++ crypto_all_kqblocked = !list_empty(&crp_kq);
++
++ /* As above, but for key ops */
++ krp = NULL;
++ list_for_each_entry(krpp, &crp_kq, krp_next) {
++ cap = crypto_checkdriver(krpp->krp_hid);
++ if (cap == NULL || cap->cc_dev == NULL) {
++ /*
++ * Operation needs to be migrated, invalidate
++ * the assigned device so it will reselect a
++ * new one below. Propagate the original
++ * crid selection flags if supplied.
++ */
++ krp->krp_hid = krp->krp_crid &
++ (CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE);
++ if (krp->krp_hid == 0)
++ krp->krp_hid =
++ CRYPTOCAP_F_SOFTWARE|CRYPTOCAP_F_HARDWARE;
++ break;
++ }
++ if (!cap->cc_kqblocked) {
++ krp = krpp;
++ break;
++ }
++ }
++ if (krp != NULL) {
++ crypto_all_kqblocked = 0;
++ list_del(&krp->krp_next);
++ crypto_drivers[krp->krp_hid].cc_kqblocked = 1;
++ CRYPTO_Q_UNLOCK();
++ result = crypto_kinvoke(krp, krp->krp_hid);
++ CRYPTO_Q_LOCK();
++ if (result == ERESTART) {
++ /*
++ * The driver ran out of resources, mark the
++ * driver ``blocked'' for cryptkop's and put
++ * the request back in the queue. It would
++ * best to put the request back where we got
++ * it but that's hard so for now we put it
++ * at the front. This should be ok; putting
++ * it at the end does not work.
++ */
++ /* XXX validate sid again? */
++ list_add(&krp->krp_next, &crp_kq);
++ cryptostats.cs_kblocks++;
++ } else
++ crypto_drivers[krp->krp_hid].cc_kqblocked = 0;
++ }
++
++ if (submit == NULL && krp == NULL) {
++ /*
++ * Nothing more to be processed. Sleep until we're
++ * woken because there are more ops to process.
++ * This happens either by submission or by a driver
++ * becoming unblocked and notifying us through
++ * crypto_unblock. Note that when we wakeup we
++ * start processing each queue again from the
++ * front. It's not clear that it's important to
++ * preserve this ordering since ops may finish
++ * out of order if dispatched to different devices
++ * and some become blocked while others do not.
++ */
++ dprintk("%s - sleeping (qe=%d qb=%d kqe=%d kqb=%d)\n",
++ __FUNCTION__,
++ list_empty(&crp_q), crypto_all_qblocked,
++ list_empty(&crp_kq), crypto_all_kqblocked);
++ CRYPTO_Q_UNLOCK();
++ crp_sleep = 1;
++ wait_event_interruptible(cryptoproc_wait,
++ !(list_empty(&crp_q) || crypto_all_qblocked) ||
++ !(list_empty(&crp_kq) || crypto_all_kqblocked) ||
++ cryptoproc == (pid_t) -1);
++ crp_sleep = 0;
++ if (signal_pending (current)) {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_lock_irq(&current->sigmask_lock);
++#endif
++ flush_signals(current);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_unlock_irq(&current->sigmask_lock);
++#endif
++ }
++ CRYPTO_Q_LOCK();
++ dprintk("%s - awake\n", __FUNCTION__);
++ if (cryptoproc == (pid_t) -1)
++ break;
++ cryptostats.cs_intrs++;
++ }
++ }
++ CRYPTO_Q_UNLOCK();
++ complete_and_exit(&cryptoproc_exited, 0);
++}
++
++/*
++ * Crypto returns thread, does callbacks for processed crypto requests.
++ * Callbacks are done here, rather than in the crypto drivers, because
++ * callbacks typically are expensive and would slow interrupt handling.
++ */
++static int
++crypto_ret_proc(void *arg)
++{
++ struct cryptop *crpt;
++ struct cryptkop *krpt;
++ unsigned long r_flags;
++
++ ocf_daemonize("crypto_ret");
++
++ CRYPTO_RETQ_LOCK();
++ for (;;) {
++ /* Harvest return q's for completed ops */
++ crpt = NULL;
++ if (!list_empty(&crp_ret_q))
++ crpt = list_entry(crp_ret_q.next, typeof(*crpt), crp_next);
++ if (crpt != NULL)
++ list_del(&crpt->crp_next);
++
++ krpt = NULL;
++ if (!list_empty(&crp_ret_kq))
++ krpt = list_entry(crp_ret_kq.next, typeof(*krpt), krp_next);
++ if (krpt != NULL)
++ list_del(&krpt->krp_next);
++
++ if (crpt != NULL || krpt != NULL) {
++ CRYPTO_RETQ_UNLOCK();
++ /*
++ * Run callbacks unlocked.
++ */
++ if (crpt != NULL)
++ crpt->crp_callback(crpt);
++ if (krpt != NULL)
++ krpt->krp_callback(krpt);
++ CRYPTO_RETQ_LOCK();
++ } else {
++ /*
++ * Nothing more to be processed. Sleep until we're
++ * woken because there are more returns to process.
++ */
++ dprintk("%s - sleeping\n", __FUNCTION__);
++ CRYPTO_RETQ_UNLOCK();
++ wait_event_interruptible(cryptoretproc_wait,
++ cryptoretproc == (pid_t) -1 ||
++ !list_empty(&crp_ret_q) ||
++ !list_empty(&crp_ret_kq));
++ if (signal_pending (current)) {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_lock_irq(&current->sigmask_lock);
++#endif
++ flush_signals(current);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_unlock_irq(&current->sigmask_lock);
++#endif
++ }
++ CRYPTO_RETQ_LOCK();
++ dprintk("%s - awake\n", __FUNCTION__);
++ if (cryptoretproc == (pid_t) -1) {
++ dprintk("%s - EXITING!\n", __FUNCTION__);
++ break;
++ }
++ cryptostats.cs_rets++;
++ }
++ }
++ CRYPTO_RETQ_UNLOCK();
++ complete_and_exit(&cryptoretproc_exited, 0);
++}
++
++
++#if 0 /* should put this into /proc or something */
++static void
++db_show_drivers(void)
++{
++ int hid;
++
++ db_printf("%12s %4s %4s %8s %2s %2s\n"
++ , "Device"
++ , "Ses"
++ , "Kops"
++ , "Flags"
++ , "QB"
++ , "KB"
++ );
++ for (hid = 0; hid < crypto_drivers_num; hid++) {
++ const struct cryptocap *cap = &crypto_drivers[hid];
++ if (cap->cc_dev == NULL)
++ continue;
++ db_printf("%-12s %4u %4u %08x %2u %2u\n"
++ , device_get_nameunit(cap->cc_dev)
++ , cap->cc_sessions
++ , cap->cc_koperations
++ , cap->cc_flags
++ , cap->cc_qblocked
++ , cap->cc_kqblocked
++ );
++ }
++}
++
++DB_SHOW_COMMAND(crypto, db_show_crypto)
++{
++ struct cryptop *crp;
++
++ db_show_drivers();
++ db_printf("\n");
++
++ db_printf("%4s %8s %4s %4s %4s %4s %8s %8s\n",
++ "HID", "Caps", "Ilen", "Olen", "Etype", "Flags",
++ "Desc", "Callback");
++ TAILQ_FOREACH(crp, &crp_q, crp_next) {
++ db_printf("%4u %08x %4u %4u %4u %04x %8p %8p\n"
++ , (int) CRYPTO_SESID2HID(crp->crp_sid)
++ , (int) CRYPTO_SESID2CAPS(crp->crp_sid)
++ , crp->crp_ilen, crp->crp_olen
++ , crp->crp_etype
++ , crp->crp_flags
++ , crp->crp_desc
++ , crp->crp_callback
++ );
++ }
++ if (!TAILQ_EMPTY(&crp_ret_q)) {
++ db_printf("\n%4s %4s %4s %8s\n",
++ "HID", "Etype", "Flags", "Callback");
++ TAILQ_FOREACH(crp, &crp_ret_q, crp_next) {
++ db_printf("%4u %4u %04x %8p\n"
++ , (int) CRYPTO_SESID2HID(crp->crp_sid)
++ , crp->crp_etype
++ , crp->crp_flags
++ , crp->crp_callback
++ );
++ }
++ }
++}
++
++DB_SHOW_COMMAND(kcrypto, db_show_kcrypto)
++{
++ struct cryptkop *krp;
++
++ db_show_drivers();
++ db_printf("\n");
++
++ db_printf("%4s %5s %4s %4s %8s %4s %8s\n",
++ "Op", "Status", "#IP", "#OP", "CRID", "HID", "Callback");
++ TAILQ_FOREACH(krp, &crp_kq, krp_next) {
++ db_printf("%4u %5u %4u %4u %08x %4u %8p\n"
++ , krp->krp_op
++ , krp->krp_status
++ , krp->krp_iparams, krp->krp_oparams
++ , krp->krp_crid, krp->krp_hid
++ , krp->krp_callback
++ );
++ }
++ if (!TAILQ_EMPTY(&crp_ret_q)) {
++ db_printf("%4s %5s %8s %4s %8s\n",
++ "Op", "Status", "CRID", "HID", "Callback");
++ TAILQ_FOREACH(krp, &crp_ret_kq, krp_next) {
++ db_printf("%4u %5u %08x %4u %8p\n"
++ , krp->krp_op
++ , krp->krp_status
++ , krp->krp_crid, krp->krp_hid
++ , krp->krp_callback
++ );
++ }
++ }
++}
++#endif
++
++
++static int
++crypto_init(void)
++{
++ int error;
++
++ dprintk("%s(0x%x)\n", __FUNCTION__, (int) crypto_init);
++
++ if (crypto_initted)
++ return 0;
++ crypto_initted = 1;
++
++ spin_lock_init(&crypto_drivers_lock);
++ spin_lock_init(&crypto_q_lock);
++ spin_lock_init(&crypto_ret_q_lock);
++
++ cryptop_zone = kmem_cache_create("cryptop", sizeof(struct cryptop),
++ 0, SLAB_HWCACHE_ALIGN, NULL
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
++ , NULL
++#endif
++ );
++
++ cryptodesc_zone = kmem_cache_create("cryptodesc", sizeof(struct cryptodesc),
++ 0, SLAB_HWCACHE_ALIGN, NULL
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
++ , NULL
++#endif
++ );
++
++ if (cryptodesc_zone == NULL || cryptop_zone == NULL) {
++ printk("crypto: crypto_init cannot setup crypto zones\n");
++ error = ENOMEM;
++ goto bad;
++ }
++
++ crypto_drivers_num = CRYPTO_DRIVERS_INITIAL;
++ crypto_drivers = kmalloc(crypto_drivers_num * sizeof(struct cryptocap),
++ GFP_KERNEL);
++ if (crypto_drivers == NULL) {
++ printk("crypto: crypto_init cannot setup crypto drivers\n");
++ error = ENOMEM;
++ goto bad;
++ }
++
++ memset(crypto_drivers, 0, crypto_drivers_num * sizeof(struct cryptocap));
++
++ init_completion(&cryptoproc_exited);
++ init_completion(&cryptoretproc_exited);
++
++ cryptoproc = 0; /* to avoid race condition where proc runs first */
++ cryptoproc = kernel_thread(crypto_proc, NULL, CLONE_FS|CLONE_FILES);
++ if (cryptoproc < 0) {
++ error = cryptoproc;
++ printk("crypto: crypto_init cannot start crypto thread; error %d",
++ error);
++ goto bad;
++ }
++
++ cryptoretproc = 0; /* to avoid race condition where proc runs first */
++ cryptoretproc = kernel_thread(crypto_ret_proc, NULL, CLONE_FS|CLONE_FILES);
++ if (cryptoretproc < 0) {
++ error = cryptoretproc;
++ printk("crypto: crypto_init cannot start cryptoret thread; error %d",
++ error);
++ goto bad;
++ }
++
++ return 0;
++bad:
++ crypto_exit();
++ return error;
++}
++
++
++static void
++crypto_exit(void)
++{
++ pid_t p;
++ unsigned long d_flags;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ /*
++ * Terminate any crypto threads.
++ */
++
++ CRYPTO_DRIVER_LOCK();
++ p = cryptoproc;
++ cryptoproc = (pid_t) -1;
++ kill_pid(p, SIGTERM, 1);
++ wake_up_interruptible(&cryptoproc_wait);
++ CRYPTO_DRIVER_UNLOCK();
++
++ wait_for_completion(&cryptoproc_exited);
++
++ CRYPTO_DRIVER_LOCK();
++ p = cryptoretproc;
++ cryptoretproc = (pid_t) -1;
++ kill_pid(p, SIGTERM, 1);
++ wake_up_interruptible(&cryptoretproc_wait);
++ CRYPTO_DRIVER_UNLOCK();
++
++ wait_for_completion(&cryptoretproc_exited);
++
++ /* XXX flush queues??? */
++
++ /*
++ * Reclaim dynamically allocated resources.
++ */
++ if (crypto_drivers != NULL)
++ kfree(crypto_drivers);
++
++ if (cryptodesc_zone != NULL)
++ kmem_cache_destroy(cryptodesc_zone);
++ if (cryptop_zone != NULL)
++ kmem_cache_destroy(cryptop_zone);
++}
++
++
++EXPORT_SYMBOL(crypto_newsession);
++EXPORT_SYMBOL(crypto_freesession);
++EXPORT_SYMBOL(crypto_get_driverid);
++EXPORT_SYMBOL(crypto_kregister);
++EXPORT_SYMBOL(crypto_register);
++EXPORT_SYMBOL(crypto_unregister);
++EXPORT_SYMBOL(crypto_unregister_all);
++EXPORT_SYMBOL(crypto_unblock);
++EXPORT_SYMBOL(crypto_dispatch);
++EXPORT_SYMBOL(crypto_kdispatch);
++EXPORT_SYMBOL(crypto_freereq);
++EXPORT_SYMBOL(crypto_getreq);
++EXPORT_SYMBOL(crypto_done);
++EXPORT_SYMBOL(crypto_kdone);
++EXPORT_SYMBOL(crypto_getfeat);
++EXPORT_SYMBOL(crypto_userasymcrypto);
++EXPORT_SYMBOL(crypto_getcaps);
++EXPORT_SYMBOL(crypto_find_driver);
++EXPORT_SYMBOL(crypto_find_device_byhid);
++
++module_init(crypto_init);
++module_exit(crypto_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("OCF (OpenBSD Cryptographic Framework)");
+diff -Nur linux-2.6.30.orig/crypto/ocf/cryptodev.c linux-2.6.30/crypto/ocf/cryptodev.c
+--- linux-2.6.30.orig/crypto/ocf/cryptodev.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/cryptodev.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1048 @@
++/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
++
++/*-
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ * The license and original author are listed below.
++ *
++ * Copyright (c) 2001 Theo de Raadt
++ * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored in part by the Defense Advanced Research Projects
++ * Agency (DARPA) and Air Force Research Laboratory, Air Force
++ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
++ *
++__FBSDID("$FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.34 2007/05/09 19:37:02 gnn Exp $");
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/types.h>
++#include <linux/time.h>
++#include <linux/delay.h>
++#include <linux/list.h>
++#include <linux/init.h>
++#include <linux/sched.h>
++#include <linux/unistd.h>
++#include <linux/module.h>
++#include <linux/wait.h>
++#include <linux/slab.h>
++#include <linux/fs.h>
++#include <linux/dcache.h>
++#include <linux/file.h>
++#include <linux/mount.h>
++#include <linux/miscdevice.h>
++#include <linux/version.h>
++#include <asm/uaccess.h>
++
++#include <cryptodev.h>
++#include <uio.h>
++
++extern asmlinkage long sys_dup(unsigned int fildes);
++
++#define debug cryptodev_debug
++int cryptodev_debug = 0;
++module_param(cryptodev_debug, int, 0644);
++MODULE_PARM_DESC(cryptodev_debug, "Enable cryptodev debug");
++
++struct csession_info {
++ u_int16_t blocksize;
++ u_int16_t minkey, maxkey;
++
++ u_int16_t keysize;
++ /* u_int16_t hashsize; */
++ u_int16_t authsize;
++ /* u_int16_t ctxsize; */
++};
++
++struct csession {
++ struct list_head list;
++ u_int64_t sid;
++ u_int32_t ses;
++
++ wait_queue_head_t waitq;
++
++ u_int32_t cipher;
++
++ u_int32_t mac;
++
++ caddr_t key;
++ int keylen;
++ u_char tmp_iv[EALG_MAX_BLOCK_LEN];
++
++ caddr_t mackey;
++ int mackeylen;
++
++ struct csession_info info;
++
++ struct iovec iovec;
++ struct uio uio;
++ int error;
++};
++
++struct fcrypt {
++ struct list_head csessions;
++ int sesn;
++};
++
++static struct csession *csefind(struct fcrypt *, u_int);
++static int csedelete(struct fcrypt *, struct csession *);
++static struct csession *cseadd(struct fcrypt *, struct csession *);
++static struct csession *csecreate(struct fcrypt *, u_int64_t,
++ struct cryptoini *crie, struct cryptoini *cria, struct csession_info *);
++static int csefree(struct csession *);
++
++static int cryptodev_op(struct csession *, struct crypt_op *);
++static int cryptodev_key(struct crypt_kop *);
++static int cryptodev_find(struct crypt_find_op *);
++
++static int cryptodev_cb(void *);
++static int cryptodev_open(struct inode *inode, struct file *filp);
++
++/*
++ * Check a crypto identifier to see if it requested
++ * a valid crid and it's capabilities match.
++ */
++static int
++checkcrid(int crid)
++{
++ int hid = crid & ~(CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
++ int typ = crid & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
++ int caps = 0;
++
++ /* if the user hasn't selected a driver, then just call newsession */
++ if (hid == 0 && typ != 0)
++ return 0;
++
++ caps = crypto_getcaps(hid);
++
++ /* didn't find anything with capabilities */
++ if (caps == 0) {
++ dprintk("%s: hid=%x typ=%x not matched\n", __FUNCTION__, hid, typ);
++ return EINVAL;
++ }
++
++ /* the user didn't specify SW or HW, so the driver is ok */
++ if (typ == 0)
++ return 0;
++
++ /* if the type specified didn't match */
++ if (typ != (caps & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE))) {
++ dprintk("%s: hid=%x typ=%x caps=%x not matched\n", __FUNCTION__,
++ hid, typ, caps);
++ return EINVAL;
++ }
++
++ return 0;
++}
++
++static int
++cryptodev_op(struct csession *cse, struct crypt_op *cop)
++{
++ struct cryptop *crp = NULL;
++ struct cryptodesc *crde = NULL, *crda = NULL;
++ int error = 0;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (cop->len > CRYPTO_MAX_DATA_LEN) {
++ dprintk("%s: %d > %d\n", __FUNCTION__, cop->len, CRYPTO_MAX_DATA_LEN);
++ return (E2BIG);
++ }
++
++ if (cse->info.blocksize && (cop->len % cse->info.blocksize) != 0) {
++ dprintk("%s: blocksize=%d len=%d\n", __FUNCTION__, cse->info.blocksize,
++ cop->len);
++ return (EINVAL);
++ }
++
++ cse->uio.uio_iov = &cse->iovec;
++ cse->uio.uio_iovcnt = 1;
++ cse->uio.uio_offset = 0;
++#if 0
++ cse->uio.uio_resid = cop->len;
++ cse->uio.uio_segflg = UIO_SYSSPACE;
++ cse->uio.uio_rw = UIO_WRITE;
++ cse->uio.uio_td = td;
++#endif
++ cse->uio.uio_iov[0].iov_len = cop->len;
++ if (cse->info.authsize)
++ cse->uio.uio_iov[0].iov_len += cse->info.authsize;
++ cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
++ GFP_KERNEL);
++
++ if (cse->uio.uio_iov[0].iov_base == NULL) {
++ dprintk("%s: iov_base kmalloc(%d) failed\n", __FUNCTION__,
++ cse->uio.uio_iov[0].iov_len);
++ return (ENOMEM);
++ }
++
++ crp = crypto_getreq((cse->info.blocksize != 0) + (cse->info.authsize != 0));
++ if (crp == NULL) {
++ dprintk("%s: ENOMEM\n", __FUNCTION__);
++ error = ENOMEM;
++ goto bail;
++ }
++
++ if (cse->info.authsize) {
++ crda = crp->crp_desc;
++ if (cse->info.blocksize)
++ crde = crda->crd_next;
++ } else {
++ if (cse->info.blocksize)
++ crde = crp->crp_desc;
++ else {
++ dprintk("%s: bad request\n", __FUNCTION__);
++ error = EINVAL;
++ goto bail;
++ }
++ }
++
++ if ((error = copy_from_user(cse->uio.uio_iov[0].iov_base, cop->src,
++ cop->len))) {
++ dprintk("%s: bad copy\n", __FUNCTION__);
++ goto bail;
++ }
++
++ if (crda) {
++ crda->crd_skip = 0;
++ crda->crd_len = cop->len;
++ crda->crd_inject = cop->len;
++
++ crda->crd_alg = cse->mac;
++ crda->crd_key = cse->mackey;
++ crda->crd_klen = cse->mackeylen * 8;
++ }
++
++ if (crde) {
++ if (cop->op == COP_ENCRYPT)
++ crde->crd_flags |= CRD_F_ENCRYPT;
++ else
++ crde->crd_flags &= ~CRD_F_ENCRYPT;
++ crde->crd_len = cop->len;
++ crde->crd_inject = 0;
++
++ crde->crd_alg = cse->cipher;
++ crde->crd_key = cse->key;
++ crde->crd_klen = cse->keylen * 8;
++ }
++
++ crp->crp_ilen = cse->uio.uio_iov[0].iov_len;
++ crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
++ | (cop->flags & COP_F_BATCH);
++ crp->crp_buf = (caddr_t)&cse->uio;
++ crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
++ crp->crp_sid = cse->sid;
++ crp->crp_opaque = (void *)cse;
++
++ if (cop->iv) {
++ if (crde == NULL) {
++ error = EINVAL;
++ dprintk("%s no crde\n", __FUNCTION__);
++ goto bail;
++ }
++ if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
++ error = EINVAL;
++ dprintk("%s arc4 with IV\n", __FUNCTION__);
++ goto bail;
++ }
++ if ((error = copy_from_user(cse->tmp_iv, cop->iv,
++ cse->info.blocksize))) {
++ dprintk("%s bad iv copy\n", __FUNCTION__);
++ goto bail;
++ }
++ memcpy(crde->crd_iv, cse->tmp_iv, cse->info.blocksize);
++ crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
++ crde->crd_skip = 0;
++ } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
++ crde->crd_skip = 0;
++ } else if (crde) {
++ crde->crd_flags |= CRD_F_IV_PRESENT;
++ crde->crd_skip = cse->info.blocksize;
++ crde->crd_len -= cse->info.blocksize;
++ }
++
++ if (cop->mac && crda == NULL) {
++ error = EINVAL;
++ dprintk("%s no crda\n", __FUNCTION__);
++ goto bail;
++ }
++
++ /*
++ * Let the dispatch run unlocked, then, interlock against the
++ * callback before checking if the operation completed and going
++ * to sleep. This insures drivers don't inherit our lock which
++ * results in a lock order reversal between crypto_dispatch forced
++ * entry and the crypto_done callback into us.
++ */
++ error = crypto_dispatch(crp);
++ if (error == 0) {
++ dprintk("%s about to WAIT\n", __FUNCTION__);
++ /*
++ * we really need to wait for driver to complete to maintain
++ * state, luckily interrupts will be remembered
++ */
++ do {
++ error = wait_event_interruptible(crp->crp_waitq,
++ ((crp->crp_flags & CRYPTO_F_DONE) != 0));
++ /*
++ * we can't break out of this loop or we will leave behind
++ * a huge mess, however, staying here means if your driver
++ * is broken user applications can hang and not be killed.
++ * The solution, fix your driver :-)
++ */
++ if (error) {
++ schedule();
++ error = 0;
++ }
++ } while ((crp->crp_flags & CRYPTO_F_DONE) == 0);
++ dprintk("%s finished WAITING error=%d\n", __FUNCTION__, error);
++ }
++
++ if (crp->crp_etype != 0) {
++ error = crp->crp_etype;
++ dprintk("%s error in crp processing\n", __FUNCTION__);
++ goto bail;
++ }
++
++ if (cse->error) {
++ error = cse->error;
++ dprintk("%s error in cse processing\n", __FUNCTION__);
++ goto bail;
++ }
++
++ if (cop->dst && (error = copy_to_user(cop->dst,
++ cse->uio.uio_iov[0].iov_base, cop->len))) {
++ dprintk("%s bad dst copy\n", __FUNCTION__);
++ goto bail;
++ }
++
++ if (cop->mac &&
++ (error=copy_to_user(cop->mac,
++ (caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
++ cse->info.authsize))) {
++ dprintk("%s bad mac copy\n", __FUNCTION__);
++ goto bail;
++ }
++
++bail:
++ if (crp)
++ crypto_freereq(crp);
++ if (cse->uio.uio_iov[0].iov_base)
++ kfree(cse->uio.uio_iov[0].iov_base);
++
++ return (error);
++}
++
++static int
++cryptodev_cb(void *op)
++{
++ struct cryptop *crp = (struct cryptop *) op;
++ struct csession *cse = (struct csession *)crp->crp_opaque;
++ int error;
++
++ dprintk("%s()\n", __FUNCTION__);
++ error = crp->crp_etype;
++ if (error == EAGAIN) {
++ crp->crp_flags &= ~CRYPTO_F_DONE;
++#ifdef NOTYET
++ /*
++ * DAVIDM I am fairly sure that we should turn this into a batch
++ * request to stop bad karma/lockup, revisit
++ */
++ crp->crp_flags |= CRYPTO_F_BATCH;
++#endif
++ return crypto_dispatch(crp);
++ }
++ if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
++ cse->error = error;
++ wake_up_interruptible(&crp->crp_waitq);
++ }
++ return (0);
++}
++
++static int
++cryptodevkey_cb(void *op)
++{
++ struct cryptkop *krp = (struct cryptkop *) op;
++ dprintk("%s()\n", __FUNCTION__);
++ wake_up_interruptible(&krp->krp_waitq);
++ return (0);
++}
++
++static int
++cryptodev_key(struct crypt_kop *kop)
++{
++ struct cryptkop *krp = NULL;
++ int error = EINVAL;
++ int in, out, size, i;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
++ dprintk("%s params too big\n", __FUNCTION__);
++ return (EFBIG);
++ }
++
++ in = kop->crk_iparams;
++ out = kop->crk_oparams;
++ switch (kop->crk_op) {
++ case CRK_MOD_EXP:
++ if (in == 3 && out == 1)
++ break;
++ return (EINVAL);
++ case CRK_MOD_EXP_CRT:
++ if (in == 6 && out == 1)
++ break;
++ return (EINVAL);
++ case CRK_DSA_SIGN:
++ if (in == 5 && out == 2)
++ break;
++ return (EINVAL);
++ case CRK_DSA_VERIFY:
++ if (in == 7 && out == 0)
++ break;
++ return (EINVAL);
++ case CRK_DH_COMPUTE_KEY:
++ if (in == 3 && out == 1)
++ break;
++ return (EINVAL);
++ default:
++ return (EINVAL);
++ }
++
++ krp = (struct cryptkop *)kmalloc(sizeof *krp, GFP_KERNEL);
++ if (!krp)
++ return (ENOMEM);
++ bzero(krp, sizeof *krp);
++ krp->krp_op = kop->crk_op;
++ krp->krp_status = kop->crk_status;
++ krp->krp_iparams = kop->crk_iparams;
++ krp->krp_oparams = kop->crk_oparams;
++ krp->krp_crid = kop->crk_crid;
++ krp->krp_status = 0;
++ krp->krp_flags = CRYPTO_KF_CBIMM;
++ krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
++ init_waitqueue_head(&krp->krp_waitq);
++
++ for (i = 0; i < CRK_MAXPARAM; i++)
++ krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
++ for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
++ size = (krp->krp_param[i].crp_nbits + 7) / 8;
++ if (size == 0)
++ continue;
++ krp->krp_param[i].crp_p = (caddr_t) kmalloc(size, GFP_KERNEL);
++ if (i >= krp->krp_iparams)
++ continue;
++ error = copy_from_user(krp->krp_param[i].crp_p,
++ kop->crk_param[i].crp_p, size);
++ if (error)
++ goto fail;
++ }
++
++ error = crypto_kdispatch(krp);
++ if (error)
++ goto fail;
++
++ do {
++ error = wait_event_interruptible(krp->krp_waitq,
++ ((krp->krp_flags & CRYPTO_KF_DONE) != 0));
++ /*
++ * we can't break out of this loop or we will leave behind
++ * a huge mess, however, staying here means if your driver
++ * is broken user applications can hang and not be killed.
++ * The solution, fix your driver :-)
++ */
++ if (error) {
++ schedule();
++ error = 0;
++ }
++ } while ((krp->krp_flags & CRYPTO_KF_DONE) == 0);
++
++ dprintk("%s finished WAITING error=%d\n", __FUNCTION__, error);
++
++ kop->crk_crid = krp->krp_crid; /* device that did the work */
++ if (krp->krp_status != 0) {
++ error = krp->krp_status;
++ goto fail;
++ }
++
++ for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
++ size = (krp->krp_param[i].crp_nbits + 7) / 8;
++ if (size == 0)
++ continue;
++ error = copy_to_user(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p,
++ size);
++ if (error)
++ goto fail;
++ }
++
++fail:
++ if (krp) {
++ kop->crk_status = krp->krp_status;
++ for (i = 0; i < CRK_MAXPARAM; i++) {
++ if (krp->krp_param[i].crp_p)
++ kfree(krp->krp_param[i].crp_p);
++ }
++ kfree(krp);
++ }
++ return (error);
++}
++
++static int
++cryptodev_find(struct crypt_find_op *find)
++{
++ device_t dev;
++
++ if (find->crid != -1) {
++ dev = crypto_find_device_byhid(find->crid);
++ if (dev == NULL)
++ return (ENOENT);
++ strlcpy(find->name, device_get_nameunit(dev),
++ sizeof(find->name));
++ } else {
++ find->crid = crypto_find_driver(find->name);
++ if (find->crid == -1)
++ return (ENOENT);
++ }
++ return (0);
++}
++
++static struct csession *
++csefind(struct fcrypt *fcr, u_int ses)
++{
++ struct csession *cse;
++
++ dprintk("%s()\n", __FUNCTION__);
++ list_for_each_entry(cse, &fcr->csessions, list)
++ if (cse->ses == ses)
++ return (cse);
++ return (NULL);
++}
++
++static int
++csedelete(struct fcrypt *fcr, struct csession *cse_del)
++{
++ struct csession *cse;
++
++ dprintk("%s()\n", __FUNCTION__);
++ list_for_each_entry(cse, &fcr->csessions, list) {
++ if (cse == cse_del) {
++ list_del(&cse->list);
++ return (1);
++ }
++ }
++ return (0);
++}
++
++static struct csession *
++cseadd(struct fcrypt *fcr, struct csession *cse)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ list_add_tail(&cse->list, &fcr->csessions);
++ cse->ses = fcr->sesn++;
++ return (cse);
++}
++
++static struct csession *
++csecreate(struct fcrypt *fcr, u_int64_t sid, struct cryptoini *crie,
++ struct cryptoini *cria, struct csession_info *info)
++{
++ struct csession *cse;
++
++ dprintk("%s()\n", __FUNCTION__);
++ cse = (struct csession *) kmalloc(sizeof(struct csession), GFP_KERNEL);
++ if (cse == NULL)
++ return NULL;
++ memset(cse, 0, sizeof(struct csession));
++
++ INIT_LIST_HEAD(&cse->list);
++ init_waitqueue_head(&cse->waitq);
++
++ cse->key = crie->cri_key;
++ cse->keylen = crie->cri_klen/8;
++ cse->mackey = cria->cri_key;
++ cse->mackeylen = cria->cri_klen/8;
++ cse->sid = sid;
++ cse->cipher = crie->cri_alg;
++ cse->mac = cria->cri_alg;
++ cse->info = *info;
++ cseadd(fcr, cse);
++ return (cse);
++}
++
++static int
++csefree(struct csession *cse)
++{
++ int error;
++
++ dprintk("%s()\n", __FUNCTION__);
++ error = crypto_freesession(cse->sid);
++ if (cse->key)
++ kfree(cse->key);
++ if (cse->mackey)
++ kfree(cse->mackey);
++ kfree(cse);
++ return(error);
++}
++
++static int
++cryptodev_ioctl(
++ struct inode *inode,
++ struct file *filp,
++ unsigned int cmd,
++ unsigned long arg)
++{
++ struct cryptoini cria, crie;
++ struct fcrypt *fcr = filp->private_data;
++ struct csession *cse;
++ struct csession_info info;
++ struct session2_op sop;
++ struct crypt_op cop;
++ struct crypt_kop kop;
++ struct crypt_find_op fop;
++ u_int64_t sid;
++ u_int32_t ses;
++ int feat, fd, error = 0, crid;
++ mm_segment_t fs;
++
++ dprintk("%s(cmd=%x arg=%lx)\n", __FUNCTION__, cmd, arg);
++
++ switch (cmd) {
++
++ case CRIOGET: {
++ dprintk("%s(CRIOGET)\n", __FUNCTION__);
++ fs = get_fs();
++ set_fs(get_ds());
++ for (fd = 0; fd < files_fdtable(current->files)->max_fds; fd++)
++ if (files_fdtable(current->files)->fd[fd] == filp)
++ break;
++ fd = sys_dup(fd);
++ set_fs(fs);
++ put_user(fd, (int *) arg);
++ return IS_ERR_VALUE(fd) ? fd : 0;
++ }
++
++#define CIOCGSESSSTR (cmd == CIOCGSESSION ? "CIOCGSESSION" : "CIOCGSESSION2")
++ case CIOCGSESSION:
++ case CIOCGSESSION2:
++ dprintk("%s(%s)\n", __FUNCTION__, CIOCGSESSSTR);
++ memset(&crie, 0, sizeof(crie));
++ memset(&cria, 0, sizeof(cria));
++ memset(&info, 0, sizeof(info));
++ memset(&sop, 0, sizeof(sop));
++
++ if (copy_from_user(&sop, (void*)arg, (cmd == CIOCGSESSION) ?
++ sizeof(struct session_op) : sizeof(sop))) {
++ dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EFAULT;
++ goto bail;
++ }
++
++ switch (sop.cipher) {
++ case 0:
++ dprintk("%s(%s) - no cipher\n", __FUNCTION__, CIOCGSESSSTR);
++ break;
++ case CRYPTO_NULL_CBC:
++ info.blocksize = NULL_BLOCK_LEN;
++ info.minkey = NULL_MIN_KEY_LEN;
++ info.maxkey = NULL_MAX_KEY_LEN;
++ break;
++ case CRYPTO_DES_CBC:
++ info.blocksize = DES_BLOCK_LEN;
++ info.minkey = DES_MIN_KEY_LEN;
++ info.maxkey = DES_MAX_KEY_LEN;
++ break;
++ case CRYPTO_3DES_CBC:
++ info.blocksize = DES3_BLOCK_LEN;
++ info.minkey = DES3_MIN_KEY_LEN;
++ info.maxkey = DES3_MAX_KEY_LEN;
++ break;
++ case CRYPTO_BLF_CBC:
++ info.blocksize = BLOWFISH_BLOCK_LEN;
++ info.minkey = BLOWFISH_MIN_KEY_LEN;
++ info.maxkey = BLOWFISH_MAX_KEY_LEN;
++ break;
++ case CRYPTO_CAST_CBC:
++ info.blocksize = CAST128_BLOCK_LEN;
++ info.minkey = CAST128_MIN_KEY_LEN;
++ info.maxkey = CAST128_MAX_KEY_LEN;
++ break;
++ case CRYPTO_SKIPJACK_CBC:
++ info.blocksize = SKIPJACK_BLOCK_LEN;
++ info.minkey = SKIPJACK_MIN_KEY_LEN;
++ info.maxkey = SKIPJACK_MAX_KEY_LEN;
++ break;
++ case CRYPTO_AES_CBC:
++ info.blocksize = AES_BLOCK_LEN;
++ info.minkey = AES_MIN_KEY_LEN;
++ info.maxkey = AES_MAX_KEY_LEN;
++ break;
++ case CRYPTO_ARC4:
++ info.blocksize = ARC4_BLOCK_LEN;
++ info.minkey = ARC4_MIN_KEY_LEN;
++ info.maxkey = ARC4_MAX_KEY_LEN;
++ break;
++ case CRYPTO_CAMELLIA_CBC:
++ info.blocksize = CAMELLIA_BLOCK_LEN;
++ info.minkey = CAMELLIA_MIN_KEY_LEN;
++ info.maxkey = CAMELLIA_MAX_KEY_LEN;
++ break;
++ default:
++ dprintk("%s(%s) - bad cipher\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EINVAL;
++ goto bail;
++ }
++
++ switch (sop.mac) {
++ case 0:
++ dprintk("%s(%s) - no mac\n", __FUNCTION__, CIOCGSESSSTR);
++ break;
++ case CRYPTO_NULL_HMAC:
++ info.authsize = NULL_HASH_LEN;
++ break;
++ case CRYPTO_MD5:
++ info.authsize = MD5_HASH_LEN;
++ break;
++ case CRYPTO_SHA1:
++ info.authsize = SHA1_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_256:
++ info.authsize = SHA2_256_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_384:
++ info.authsize = SHA2_384_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_512:
++ info.authsize = SHA2_512_HASH_LEN;
++ break;
++ case CRYPTO_RIPEMD160:
++ info.authsize = RIPEMD160_HASH_LEN;
++ break;
++ case CRYPTO_MD5_HMAC:
++ info.authsize = MD5_HASH_LEN;
++ break;
++ case CRYPTO_SHA1_HMAC:
++ info.authsize = SHA1_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_256_HMAC:
++ info.authsize = SHA2_256_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_384_HMAC:
++ info.authsize = SHA2_384_HASH_LEN;
++ break;
++ case CRYPTO_SHA2_512_HMAC:
++ info.authsize = SHA2_512_HASH_LEN;
++ break;
++ case CRYPTO_RIPEMD160_HMAC:
++ info.authsize = RIPEMD160_HASH_LEN;
++ break;
++ default:
++ dprintk("%s(%s) - bad mac\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EINVAL;
++ goto bail;
++ }
++
++ if (info.blocksize) {
++ crie.cri_alg = sop.cipher;
++ crie.cri_klen = sop.keylen * 8;
++ if ((info.maxkey && sop.keylen > info.maxkey) ||
++ sop.keylen < info.minkey) {
++ dprintk("%s(%s) - bad key\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EINVAL;
++ goto bail;
++ }
++
++ crie.cri_key = (u_int8_t *) kmalloc(crie.cri_klen/8+1, GFP_KERNEL);
++ if (copy_from_user(crie.cri_key, sop.key,
++ crie.cri_klen/8)) {
++ dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EFAULT;
++ goto bail;
++ }
++ if (info.authsize)
++ crie.cri_next = &cria;
++ }
++
++ if (info.authsize) {
++ cria.cri_alg = sop.mac;
++ cria.cri_klen = sop.mackeylen * 8;
++ if ((info.maxkey && sop.mackeylen > info.maxkey) ||
++ sop.keylen < info.minkey) {
++ dprintk("%s(%s) - mackeylen %d\n", __FUNCTION__, CIOCGSESSSTR,
++ sop.mackeylen);
++ error = EINVAL;
++ goto bail;
++ }
++
++ if (cria.cri_klen) {
++ cria.cri_key = (u_int8_t *) kmalloc(cria.cri_klen/8,GFP_KERNEL);
++ if (copy_from_user(cria.cri_key, sop.mackey,
++ cria.cri_klen / 8)) {
++ dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EFAULT;
++ goto bail;
++ }
++ }
++ }
++
++ /* NB: CIOGSESSION2 has the crid */
++ if (cmd == CIOCGSESSION2) {
++ crid = sop.crid;
++ error = checkcrid(crid);
++ if (error) {
++ dprintk("%s(%s) - checkcrid %x\n", __FUNCTION__,
++ CIOCGSESSSTR, error);
++ goto bail;
++ }
++ } else {
++ /* allow either HW or SW to be used */
++ crid = CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
++ }
++ error = crypto_newsession(&sid, (info.blocksize ? &crie : &cria), crid);
++ if (error) {
++ dprintk("%s(%s) - newsession %d\n",__FUNCTION__,CIOCGSESSSTR,error);
++ goto bail;
++ }
++
++ cse = csecreate(fcr, sid, &crie, &cria, &info);
++ if (cse == NULL) {
++ crypto_freesession(sid);
++ error = EINVAL;
++ dprintk("%s(%s) - csecreate failed\n", __FUNCTION__, CIOCGSESSSTR);
++ goto bail;
++ }
++ sop.ses = cse->ses;
++
++ if (cmd == CIOCGSESSION2) {
++ /* return hardware/driver id */
++ sop.crid = CRYPTO_SESID2HID(cse->sid);
++ }
++
++ if (copy_to_user((void*)arg, &sop, (cmd == CIOCGSESSION) ?
++ sizeof(struct session_op) : sizeof(sop))) {
++ dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
++ error = EFAULT;
++ }
++bail:
++ if (error) {
++ dprintk("%s(%s) - bail %d\n", __FUNCTION__, CIOCGSESSSTR, error);
++ if (crie.cri_key)
++ kfree(crie.cri_key);
++ if (cria.cri_key)
++ kfree(cria.cri_key);
++ }
++ break;
++ case CIOCFSESSION:
++ dprintk("%s(CIOCFSESSION)\n", __FUNCTION__);
++ get_user(ses, (uint32_t*)arg);
++ cse = csefind(fcr, ses);
++ if (cse == NULL) {
++ error = EINVAL;
++ dprintk("%s(CIOCFSESSION) - Fail %d\n", __FUNCTION__, error);
++ break;
++ }
++ csedelete(fcr, cse);
++ error = csefree(cse);
++ break;
++ case CIOCCRYPT:
++ dprintk("%s(CIOCCRYPT)\n", __FUNCTION__);
++ if(copy_from_user(&cop, (void*)arg, sizeof(cop))) {
++ dprintk("%s(CIOCCRYPT) - bad copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ cse = csefind(fcr, cop.ses);
++ if (cse == NULL) {
++ error = EINVAL;
++ dprintk("%s(CIOCCRYPT) - Fail %d\n", __FUNCTION__, error);
++ break;
++ }
++ error = cryptodev_op(cse, &cop);
++ if(copy_to_user((void*)arg, &cop, sizeof(cop))) {
++ dprintk("%s(CIOCCRYPT) - bad return copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ break;
++ case CIOCKEY:
++ case CIOCKEY2:
++ dprintk("%s(CIOCKEY)\n", __FUNCTION__);
++ if (!crypto_userasymcrypto)
++ return (EPERM); /* XXX compat? */
++ if(copy_from_user(&kop, (void*)arg, sizeof(kop))) {
++ dprintk("%s(CIOCKEY) - bad copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ if (cmd == CIOCKEY) {
++ /* NB: crypto core enforces s/w driver use */
++ kop.crk_crid =
++ CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
++ }
++ error = cryptodev_key(&kop);
++ if(copy_to_user((void*)arg, &kop, sizeof(kop))) {
++ dprintk("%s(CIOCGKEY) - bad return copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ break;
++ case CIOCASYMFEAT:
++ dprintk("%s(CIOCASYMFEAT)\n", __FUNCTION__);
++ if (!crypto_userasymcrypto) {
++ /*
++ * NB: if user asym crypto operations are
++ * not permitted return "no algorithms"
++ * so well-behaved applications will just
++ * fallback to doing them in software.
++ */
++ feat = 0;
++ } else
++ error = crypto_getfeat(&feat);
++ if (!error) {
++ error = copy_to_user((void*)arg, &feat, sizeof(feat));
++ }
++ break;
++ case CIOCFINDDEV:
++ if (copy_from_user(&fop, (void*)arg, sizeof(fop))) {
++ dprintk("%s(CIOCFINDDEV) - bad copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ error = cryptodev_find(&fop);
++ if (copy_to_user((void*)arg, &fop, sizeof(fop))) {
++ dprintk("%s(CIOCFINDDEV) - bad return copy\n", __FUNCTION__);
++ error = EFAULT;
++ goto bail;
++ }
++ break;
++ default:
++ dprintk("%s(unknown ioctl 0x%x)\n", __FUNCTION__, cmd);
++ error = EINVAL;
++ break;
++ }
++ return(-error);
++}
++
++#ifdef HAVE_UNLOCKED_IOCTL
++static long
++cryptodev_unlocked_ioctl(
++ struct file *filp,
++ unsigned int cmd,
++ unsigned long arg)
++{
++ return cryptodev_ioctl(NULL, filp, cmd, arg);
++}
++#endif
++
++static int
++cryptodev_open(struct inode *inode, struct file *filp)
++{
++ struct fcrypt *fcr;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (filp->private_data) {
++ printk("cryptodev: Private data already exists !\n");
++ return(0);
++ }
++
++ fcr = kmalloc(sizeof(*fcr), GFP_KERNEL);
++ if (!fcr) {
++ dprintk("%s() - malloc failed\n", __FUNCTION__);
++ return(-ENOMEM);
++ }
++ memset(fcr, 0, sizeof(*fcr));
++
++ INIT_LIST_HEAD(&fcr->csessions);
++ filp->private_data = fcr;
++ return(0);
++}
++
++static int
++cryptodev_release(struct inode *inode, struct file *filp)
++{
++ struct fcrypt *fcr = filp->private_data;
++ struct csession *cse, *tmp;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (!filp) {
++ printk("cryptodev: No private data on release\n");
++ return(0);
++ }
++
++ list_for_each_entry_safe(cse, tmp, &fcr->csessions, list) {
++ list_del(&cse->list);
++ (void)csefree(cse);
++ }
++ filp->private_data = NULL;
++ kfree(fcr);
++ return(0);
++}
++
++static struct file_operations cryptodev_fops = {
++ .owner = THIS_MODULE,
++ .open = cryptodev_open,
++ .release = cryptodev_release,
++ .ioctl = cryptodev_ioctl,
++#ifdef HAVE_UNLOCKED_IOCTL
++ .unlocked_ioctl = cryptodev_unlocked_ioctl,
++#endif
++};
++
++static struct miscdevice cryptodev = {
++ .minor = CRYPTODEV_MINOR,
++ .name = "crypto",
++ .fops = &cryptodev_fops,
++};
++
++static int __init
++cryptodev_init(void)
++{
++ int rc;
++
++ dprintk("%s(%p)\n", __FUNCTION__, cryptodev_init);
++ rc = misc_register(&cryptodev);
++ if (rc) {
++ printk(KERN_ERR "cryptodev: registration of /dev/crypto failed\n");
++ return(rc);
++ }
++
++ return(0);
++}
++
++static void __exit
++cryptodev_exit(void)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ misc_deregister(&cryptodev);
++}
++
++module_init(cryptodev_init);
++module_exit(cryptodev_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("Cryptodev (user interface to OCF)");
+diff -Nur linux-2.6.30.orig/crypto/ocf/cryptodev.h linux-2.6.30/crypto/ocf/cryptodev.h
+--- linux-2.6.30.orig/crypto/ocf/cryptodev.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/cryptodev.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,478 @@
++/* $FreeBSD: src/sys/opencrypto/cryptodev.h,v 1.25 2007/05/09 19:37:02 gnn Exp $ */
++/* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */
++
++/*-
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ * The license and original author are listed below.
++ *
++ * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
++ * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
++ *
++ * This code was written by Angelos D. Keromytis in Athens, Greece, in
++ * February 2000. Network Security Technologies Inc. (NSTI) kindly
++ * supported the development of this code.
++ *
++ * Copyright (c) 2000 Angelos D. Keromytis
++ *
++ * Permission to use, copy, and modify this software with or without fee
++ * is hereby granted, provided that this entire notice is included in
++ * all source code copies of any software which is or includes a copy or
++ * modification of this software.
++ *
++ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
++ * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
++ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
++ * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
++ * PURPOSE.
++ *
++ * Copyright (c) 2001 Theo de Raadt
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored in part by the Defense Advanced Research Projects
++ * Agency (DARPA) and Air Force Research Laboratory, Air Force
++ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
++ *
++ */
++
++#ifndef _CRYPTO_CRYPTO_H_
++#define _CRYPTO_CRYPTO_H_
++
++/* Some initial values */
++#define CRYPTO_DRIVERS_INITIAL 4
++#define CRYPTO_SW_SESSIONS 32
++
++/* Hash values */
++#define NULL_HASH_LEN 0
++#define MD5_HASH_LEN 16
++#define SHA1_HASH_LEN 20
++#define RIPEMD160_HASH_LEN 20
++#define SHA2_256_HASH_LEN 32
++#define SHA2_384_HASH_LEN 48
++#define SHA2_512_HASH_LEN 64
++#define MD5_KPDK_HASH_LEN 16
++#define SHA1_KPDK_HASH_LEN 20
++/* Maximum hash algorithm result length */
++#define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */
++
++/* HMAC values */
++#define NULL_HMAC_BLOCK_LEN 1
++#define MD5_HMAC_BLOCK_LEN 64
++#define SHA1_HMAC_BLOCK_LEN 64
++#define RIPEMD160_HMAC_BLOCK_LEN 64
++#define SHA2_256_HMAC_BLOCK_LEN 64
++#define SHA2_384_HMAC_BLOCK_LEN 128
++#define SHA2_512_HMAC_BLOCK_LEN 128
++/* Maximum HMAC block length */
++#define HMAC_MAX_BLOCK_LEN SHA2_512_HMAC_BLOCK_LEN /* Keep this updated */
++#define HMAC_IPAD_VAL 0x36
++#define HMAC_OPAD_VAL 0x5C
++
++/* Encryption algorithm block sizes */
++#define NULL_BLOCK_LEN 1
++#define DES_BLOCK_LEN 8
++#define DES3_BLOCK_LEN 8
++#define BLOWFISH_BLOCK_LEN 8
++#define SKIPJACK_BLOCK_LEN 8
++#define CAST128_BLOCK_LEN 8
++#define RIJNDAEL128_BLOCK_LEN 16
++#define AES_BLOCK_LEN RIJNDAEL128_BLOCK_LEN
++#define CAMELLIA_BLOCK_LEN 16
++#define ARC4_BLOCK_LEN 1
++#define EALG_MAX_BLOCK_LEN AES_BLOCK_LEN /* Keep this updated */
++
++/* Encryption algorithm min and max key sizes */
++#define NULL_MIN_KEY_LEN 0
++#define NULL_MAX_KEY_LEN 0
++#define DES_MIN_KEY_LEN 8
++#define DES_MAX_KEY_LEN 8
++#define DES3_MIN_KEY_LEN 24
++#define DES3_MAX_KEY_LEN 24
++#define BLOWFISH_MIN_KEY_LEN 4
++#define BLOWFISH_MAX_KEY_LEN 56
++#define SKIPJACK_MIN_KEY_LEN 10
++#define SKIPJACK_MAX_KEY_LEN 10
++#define CAST128_MIN_KEY_LEN 5
++#define CAST128_MAX_KEY_LEN 16
++#define RIJNDAEL128_MIN_KEY_LEN 16
++#define RIJNDAEL128_MAX_KEY_LEN 32
++#define AES_MIN_KEY_LEN RIJNDAEL128_MIN_KEY_LEN
++#define AES_MAX_KEY_LEN RIJNDAEL128_MAX_KEY_LEN
++#define CAMELLIA_MIN_KEY_LEN 16
++#define CAMELLIA_MAX_KEY_LEN 32
++#define ARC4_MIN_KEY_LEN 1
++#define ARC4_MAX_KEY_LEN 256
++
++/* Max size of data that can be processed */
++#define CRYPTO_MAX_DATA_LEN 64*1024 - 1
++
++#define CRYPTO_ALGORITHM_MIN 1
++#define CRYPTO_DES_CBC 1
++#define CRYPTO_3DES_CBC 2
++#define CRYPTO_BLF_CBC 3
++#define CRYPTO_CAST_CBC 4
++#define CRYPTO_SKIPJACK_CBC 5
++#define CRYPTO_MD5_HMAC 6
++#define CRYPTO_SHA1_HMAC 7
++#define CRYPTO_RIPEMD160_HMAC 8
++#define CRYPTO_MD5_KPDK 9
++#define CRYPTO_SHA1_KPDK 10
++#define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
++#define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
++#define CRYPTO_ARC4 12
++#define CRYPTO_MD5 13
++#define CRYPTO_SHA1 14
++#define CRYPTO_NULL_HMAC 15
++#define CRYPTO_NULL_CBC 16
++#define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */
++#define CRYPTO_SHA2_256_HMAC 18
++#define CRYPTO_SHA2_384_HMAC 19
++#define CRYPTO_SHA2_512_HMAC 20
++#define CRYPTO_CAMELLIA_CBC 21
++#define CRYPTO_SHA2_256 22
++#define CRYPTO_SHA2_384 23
++#define CRYPTO_SHA2_512 24
++#define CRYPTO_RIPEMD160 25
++#define CRYPTO_ALGORITHM_MAX 25 /* Keep updated - see below */
++
++/* Algorithm flags */
++#define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */
++#define CRYPTO_ALG_FLAG_RNG_ENABLE 0x02 /* Has HW RNG for DH/DSA */
++#define CRYPTO_ALG_FLAG_DSA_SHA 0x04 /* Can do SHA on msg */
++
++/*
++ * Crypto driver/device flags. They can set in the crid
++ * parameter when creating a session or submitting a key
++ * op to affect the device/driver assigned. If neither
++ * of these are specified then the crid is assumed to hold
++ * the driver id of an existing (and suitable) device that
++ * must be used to satisfy the request.
++ */
++#define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */
++#define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */
++
++/* NB: deprecated */
++struct session_op {
++ u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
++ u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
++
++ u_int32_t keylen; /* cipher key */
++ caddr_t key;
++ int mackeylen; /* mac key */
++ caddr_t mackey;
++
++ u_int32_t ses; /* returns: session # */
++};
++
++struct session2_op {
++ u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
++ u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
++
++ u_int32_t keylen; /* cipher key */
++ caddr_t key;
++ int mackeylen; /* mac key */
++ caddr_t mackey;
++
++ u_int32_t ses; /* returns: session # */
++ int crid; /* driver id + flags (rw) */
++ int pad[4]; /* for future expansion */
++};
++
++struct crypt_op {
++ u_int32_t ses;
++ u_int16_t op; /* i.e. COP_ENCRYPT */
++#define COP_NONE 0
++#define COP_ENCRYPT 1
++#define COP_DECRYPT 2
++ u_int16_t flags;
++#define COP_F_BATCH 0x0008 /* Batch op if possible */
++ u_int len;
++ caddr_t src, dst; /* become iov[] inside kernel */
++ caddr_t mac; /* must be big enough for chosen MAC */
++ caddr_t iv;
++};
++
++/*
++ * Parameters for looking up a crypto driver/device by
++ * device name or by id. The latter are returned for
++ * created sessions (crid) and completed key operations.
++ */
++struct crypt_find_op {
++ int crid; /* driver id + flags */
++ char name[32]; /* device/driver name */
++};
++
++/* bignum parameter, in packed bytes, ... */
++struct crparam {
++ caddr_t crp_p;
++ u_int crp_nbits;
++};
++
++#define CRK_MAXPARAM 8
++
++struct crypt_kop {
++ u_int crk_op; /* ie. CRK_MOD_EXP or other */
++ u_int crk_status; /* return status */
++ u_short crk_iparams; /* # of input parameters */
++ u_short crk_oparams; /* # of output parameters */
++ u_int crk_crid; /* NB: only used by CIOCKEY2 (rw) */
++ struct crparam crk_param[CRK_MAXPARAM];
++};
++#define CRK_ALGORITM_MIN 0
++#define CRK_MOD_EXP 0
++#define CRK_MOD_EXP_CRT 1
++#define CRK_DSA_SIGN 2
++#define CRK_DSA_VERIFY 3
++#define CRK_DH_COMPUTE_KEY 4
++#define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */
++
++#define CRF_MOD_EXP (1 << CRK_MOD_EXP)
++#define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT)
++#define CRF_DSA_SIGN (1 << CRK_DSA_SIGN)
++#define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY)
++#define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY)
++
++/*
++ * done against open of /dev/crypto, to get a cloned descriptor.
++ * Please use F_SETFD against the cloned descriptor.
++ */
++#define CRIOGET _IOWR('c', 100, u_int32_t)
++#define CRIOASYMFEAT CIOCASYMFEAT
++#define CRIOFINDDEV CIOCFINDDEV
++
++/* the following are done against the cloned descriptor */
++#define CIOCGSESSION _IOWR('c', 101, struct session_op)
++#define CIOCFSESSION _IOW('c', 102, u_int32_t)
++#define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
++#define CIOCKEY _IOWR('c', 104, struct crypt_kop)
++#define CIOCASYMFEAT _IOR('c', 105, u_int32_t)
++#define CIOCGSESSION2 _IOWR('c', 106, struct session2_op)
++#define CIOCKEY2 _IOWR('c', 107, struct crypt_kop)
++#define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op)
++
++struct cryptotstat {
++ struct timespec acc; /* total accumulated time */
++ struct timespec min; /* min time */
++ struct timespec max; /* max time */
++ u_int32_t count; /* number of observations */
++};
++
++struct cryptostats {
++ u_int32_t cs_ops; /* symmetric crypto ops submitted */
++ u_int32_t cs_errs; /* symmetric crypto ops that failed */
++ u_int32_t cs_kops; /* asymetric/key ops submitted */
++ u_int32_t cs_kerrs; /* asymetric/key ops that failed */
++ u_int32_t cs_intrs; /* crypto swi thread activations */
++ u_int32_t cs_rets; /* crypto return thread activations */
++ u_int32_t cs_blocks; /* symmetric op driver block */
++ u_int32_t cs_kblocks; /* symmetric op driver block */
++ /*
++ * When CRYPTO_TIMING is defined at compile time and the
++ * sysctl debug.crypto is set to 1, the crypto system will
++ * accumulate statistics about how long it takes to process
++ * crypto requests at various points during processing.
++ */
++ struct cryptotstat cs_invoke; /* crypto_dipsatch -> crypto_invoke */
++ struct cryptotstat cs_done; /* crypto_invoke -> crypto_done */
++ struct cryptotstat cs_cb; /* crypto_done -> callback */
++ struct cryptotstat cs_finis; /* callback -> callback return */
++
++ u_int32_t cs_drops; /* crypto ops dropped due to congestion */
++};
++
++#ifdef __KERNEL__
++
++/* Standard initialization structure beginning */
++struct cryptoini {
++ int cri_alg; /* Algorithm to use */
++ int cri_klen; /* Key length, in bits */
++ int cri_mlen; /* Number of bytes we want from the
++ entire hash. 0 means all. */
++ caddr_t cri_key; /* key to use */
++ u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
++ struct cryptoini *cri_next;
++};
++
++/* Describe boundaries of a single crypto operation */
++struct cryptodesc {
++ int crd_skip; /* How many bytes to ignore from start */
++ int crd_len; /* How many bytes to process */
++ int crd_inject; /* Where to inject results, if applicable */
++ int crd_flags;
++
++#define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */
++#define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in
++ place, so don't copy. */
++#define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */
++#define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */
++#define CRD_F_KEY_EXPLICIT 0x10 /* Key explicitly provided */
++#define CRD_F_COMP 0x0f /* Set when doing compression */
++
++ struct cryptoini CRD_INI; /* Initialization/context data */
++#define crd_iv CRD_INI.cri_iv
++#define crd_key CRD_INI.cri_key
++#define crd_alg CRD_INI.cri_alg
++#define crd_klen CRD_INI.cri_klen
++
++ struct cryptodesc *crd_next;
++};
++
++/* Structure describing complete operation */
++struct cryptop {
++ struct list_head crp_next;
++ wait_queue_head_t crp_waitq;
++
++ u_int64_t crp_sid; /* Session ID */
++ int crp_ilen; /* Input data total length */
++ int crp_olen; /* Result total length */
++
++ int crp_etype; /*
++ * Error type (zero means no error).
++ * All error codes except EAGAIN
++ * indicate possible data corruption (as in,
++ * the data have been touched). On all
++ * errors, the crp_sid may have changed
++ * (reset to a new one), so the caller
++ * should always check and use the new
++ * value on future requests.
++ */
++ int crp_flags;
++
++#define CRYPTO_F_SKBUF 0x0001 /* Input/output are skbuf chains */
++#define CRYPTO_F_IOV 0x0002 /* Input/output are uio */
++#define CRYPTO_F_REL 0x0004 /* Must return data in same place */
++#define CRYPTO_F_BATCH 0x0008 /* Batch op if possible */
++#define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */
++#define CRYPTO_F_DONE 0x0020 /* Operation completed */
++#define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
++
++ caddr_t crp_buf; /* Data to be processed */
++ caddr_t crp_opaque; /* Opaque pointer, passed along */
++ struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
++
++ int (*crp_callback)(struct cryptop *); /* Callback function */
++};
++
++#define CRYPTO_BUF_CONTIG 0x0
++#define CRYPTO_BUF_IOV 0x1
++#define CRYPTO_BUF_SKBUF 0x2
++
++#define CRYPTO_OP_DECRYPT 0x0
++#define CRYPTO_OP_ENCRYPT 0x1
++
++/*
++ * Hints passed to process methods.
++ */
++#define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
++
++struct cryptkop {
++ struct list_head krp_next;
++ wait_queue_head_t krp_waitq;
++
++ int krp_flags;
++#define CRYPTO_KF_DONE 0x0001 /* Operation completed */
++#define CRYPTO_KF_CBIMM 0x0002 /* Do callback immediately */
++
++ u_int krp_op; /* ie. CRK_MOD_EXP or other */
++ u_int krp_status; /* return status */
++ u_short krp_iparams; /* # of input parameters */
++ u_short krp_oparams; /* # of output parameters */
++ u_int krp_crid; /* desired device, etc. */
++ u_int32_t krp_hid;
++ struct crparam krp_param[CRK_MAXPARAM]; /* kvm */
++ int (*krp_callback)(struct cryptkop *);
++};
++
++#include <ocf-compat.h>
++
++/*
++ * Session ids are 64 bits. The lower 32 bits contain a "local id" which
++ * is a driver-private session identifier. The upper 32 bits contain a
++ * "hardware id" used by the core crypto code to identify the driver and
++ * a copy of the driver's capabilities that can be used by client code to
++ * optimize operation.
++ */
++#define CRYPTO_SESID2HID(_sid) (((_sid) >> 32) & 0x00ffffff)
++#define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 32) & 0xff000000)
++#define CRYPTO_SESID2LID(_sid) (((u_int32_t) (_sid)) & 0xffffffff)
++
++extern int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
++extern int crypto_freesession(u_int64_t sid);
++#define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE
++#define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE
++#define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */
++extern int32_t crypto_get_driverid(device_t dev, int flags);
++extern int crypto_find_driver(const char *);
++extern device_t crypto_find_device_byhid(int hid);
++extern int crypto_getcaps(int hid);
++extern int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
++ u_int32_t flags);
++extern int crypto_kregister(u_int32_t, int, u_int32_t);
++extern int crypto_unregister(u_int32_t driverid, int alg);
++extern int crypto_unregister_all(u_int32_t driverid);
++extern int crypto_dispatch(struct cryptop *crp);
++extern int crypto_kdispatch(struct cryptkop *);
++#define CRYPTO_SYMQ 0x1
++#define CRYPTO_ASYMQ 0x2
++extern int crypto_unblock(u_int32_t, int);
++extern void crypto_done(struct cryptop *crp);
++extern void crypto_kdone(struct cryptkop *);
++extern int crypto_getfeat(int *);
++
++extern void crypto_freereq(struct cryptop *crp);
++extern struct cryptop *crypto_getreq(int num);
++
++extern int crypto_usercrypto; /* userland may do crypto requests */
++extern int crypto_userasymcrypto; /* userland may do asym crypto reqs */
++extern int crypto_devallowsoft; /* only use hardware crypto */
++
++/*
++ * random number support, crypto_unregister_all will unregister
++ */
++extern int crypto_rregister(u_int32_t driverid,
++ int (*read_random)(void *arg, u_int32_t *buf, int len), void *arg);
++extern int crypto_runregister_all(u_int32_t driverid);
++
++/*
++ * Crypto-related utility routines used mainly by drivers.
++ *
++ * XXX these don't really belong here; but for now they're
++ * kept apart from the rest of the system.
++ */
++struct uio;
++extern void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
++extern void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
++extern struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
++
++extern void crypto_copyback(int flags, caddr_t buf, int off, int size,
++ caddr_t in);
++extern void crypto_copydata(int flags, caddr_t buf, int off, int size,
++ caddr_t out);
++extern int crypto_apply(int flags, caddr_t buf, int off, int len,
++ int (*f)(void *, void *, u_int), void *arg);
++
++#endif /* __KERNEL__ */
++#endif /* _CRYPTO_CRYPTO_H_ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/cryptosoft.c linux-2.6.30/crypto/ocf/cryptosoft.c
+--- linux-2.6.30.orig/crypto/ocf/cryptosoft.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/cryptosoft.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,898 @@
++/*
++ * An OCF module that uses the linux kernel cryptoapi, based on the
++ * original cryptosoft for BSD by Angelos D. Keromytis (angelos@cis.upenn.edu)
++ * but is mostly unrecognisable,
++ *
++ * Written by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2004-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ * ---------------------------------------------------------------------------
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/sched.h>
++#include <linux/wait.h>
++#include <linux/crypto.h>
++#include <linux/mm.h>
++#include <linux/skbuff.h>
++#include <linux/random.h>
++#include <linux/scatterlist.h>
++
++#include <cryptodev.h>
++#include <uio.h>
++
++struct {
++ softc_device_decl sc_dev;
++} swcr_softc;
++
++#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
++
++/* Software session entry */
++
++#define SW_TYPE_CIPHER 0
++#define SW_TYPE_HMAC 1
++#define SW_TYPE_AUTH2 2
++#define SW_TYPE_HASH 3
++#define SW_TYPE_COMP 4
++#define SW_TYPE_BLKCIPHER 5
++
++struct swcr_data {
++ int sw_type;
++ int sw_alg;
++ struct crypto_tfm *sw_tfm;
++ union {
++ struct {
++ char *sw_key;
++ int sw_klen;
++ int sw_mlen;
++ } hmac;
++ void *sw_comp_buf;
++ } u;
++ struct swcr_data *sw_next;
++};
++
++#ifndef CRYPTO_TFM_MODE_CBC
++/*
++ * As of linux-2.6.21 this is no longer defined, and presumably no longer
++ * needed to be passed into the crypto core code.
++ */
++#define CRYPTO_TFM_MODE_CBC 0
++#define CRYPTO_TFM_MODE_ECB 0
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
++ /*
++ * Linux 2.6.19 introduced a new Crypto API, setup macro's to convert new
++ * API into old API.
++ */
++
++ /* Symmetric/Block Cipher */
++ struct blkcipher_desc
++ {
++ struct crypto_tfm *tfm;
++ void *info;
++ };
++ #define ecb(X) #X
++ #define cbc(X) #X
++ #define crypto_has_blkcipher(X, Y, Z) crypto_alg_available(X, 0)
++ #define crypto_blkcipher_cast(X) X
++ #define crypto_blkcipher_tfm(X) X
++ #define crypto_alloc_blkcipher(X, Y, Z) crypto_alloc_tfm(X, mode)
++ #define crypto_blkcipher_ivsize(X) crypto_tfm_alg_ivsize(X)
++ #define crypto_blkcipher_blocksize(X) crypto_tfm_alg_blocksize(X)
++ #define crypto_blkcipher_setkey(X, Y, Z) crypto_cipher_setkey(X, Y, Z)
++ #define crypto_blkcipher_encrypt_iv(W, X, Y, Z) \
++ crypto_cipher_encrypt_iv((W)->tfm, X, Y, Z, (u8 *)((W)->info))
++ #define crypto_blkcipher_decrypt_iv(W, X, Y, Z) \
++ crypto_cipher_decrypt_iv((W)->tfm, X, Y, Z, (u8 *)((W)->info))
++
++ /* Hash/HMAC/Digest */
++ struct hash_desc
++ {
++ struct crypto_tfm *tfm;
++ };
++ #define hmac(X) #X
++ #define crypto_has_hash(X, Y, Z) crypto_alg_available(X, 0)
++ #define crypto_hash_cast(X) X
++ #define crypto_hash_tfm(X) X
++ #define crypto_alloc_hash(X, Y, Z) crypto_alloc_tfm(X, mode)
++ #define crypto_hash_digestsize(X) crypto_tfm_alg_digestsize(X)
++ #define crypto_hash_digest(W, X, Y, Z) \
++ crypto_digest_digest((W)->tfm, X, sg_num, Z)
++
++ /* Asymmetric Cipher */
++ #define crypto_has_cipher(X, Y, Z) crypto_alg_available(X, 0)
++
++ /* Compression */
++ #define crypto_has_comp(X, Y, Z) crypto_alg_available(X, 0)
++ #define crypto_comp_tfm(X) X
++ #define crypto_comp_cast(X) X
++ #define crypto_alloc_comp(X, Y, Z) crypto_alloc_tfm(X, mode)
++#else
++ #define ecb(X) "ecb(" #X ")"
++ #define cbc(X) "cbc(" #X ")"
++ #define hmac(X) "hmac(" #X ")"
++#endif /* if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) */
++
++struct crypto_details
++{
++ char *alg_name;
++ int mode;
++ int sw_type;
++};
++
++/*
++ * This needs to be kept updated with CRYPTO_xxx list (cryptodev.h).
++ * If the Algorithm is not supported, then insert a {NULL, 0, 0} entry.
++ *
++ * IMPORTANT: The index to the array IS CRYPTO_xxx.
++ */
++static struct crypto_details crypto_details[CRYPTO_ALGORITHM_MAX + 1] = {
++ { NULL, 0, 0 },
++ /* CRYPTO_xxx index starts at 1 */
++ { cbc(des), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { cbc(des3_ede), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { cbc(blowfish), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { cbc(cast5), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { cbc(skipjack), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { hmac(md5), 0, SW_TYPE_HMAC },
++ { hmac(sha1), 0, SW_TYPE_HMAC },
++ { hmac(ripemd160), 0, SW_TYPE_HMAC },
++ { "md5-kpdk??", 0, SW_TYPE_HASH },
++ { "sha1-kpdk??", 0, SW_TYPE_HASH },
++ { cbc(aes), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { ecb(arc4), CRYPTO_TFM_MODE_ECB, SW_TYPE_BLKCIPHER },
++ { "md5", 0, SW_TYPE_HASH },
++ { "sha1", 0, SW_TYPE_HASH },
++ { hmac(digest_null), 0, SW_TYPE_HMAC },
++ { cbc(cipher_null), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { "deflate", 0, SW_TYPE_COMP },
++ { hmac(sha256), 0, SW_TYPE_HMAC },
++ { hmac(sha384), 0, SW_TYPE_HMAC },
++ { hmac(sha512), 0, SW_TYPE_HMAC },
++ { cbc(camellia), CRYPTO_TFM_MODE_CBC, SW_TYPE_BLKCIPHER },
++ { "sha256", 0, SW_TYPE_HASH },
++ { "sha384", 0, SW_TYPE_HASH },
++ { "sha512", 0, SW_TYPE_HASH },
++ { "ripemd160", 0, SW_TYPE_HASH },
++};
++
++int32_t swcr_id = -1;
++module_param(swcr_id, int, 0444);
++MODULE_PARM_DESC(swcr_id, "Read-Only OCF ID for cryptosoft driver");
++
++int swcr_fail_if_compression_grows = 1;
++module_param(swcr_fail_if_compression_grows, int, 0644);
++MODULE_PARM_DESC(swcr_fail_if_compression_grows,
++ "Treat compression that results in more data as a failure");
++
++static struct swcr_data **swcr_sessions = NULL;
++static u_int32_t swcr_sesnum = 0;
++
++static int swcr_process(device_t, struct cryptop *, int);
++static int swcr_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int swcr_freesession(device_t, u_int64_t);
++
++static device_method_t swcr_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, swcr_newsession),
++ DEVMETHOD(cryptodev_freesession,swcr_freesession),
++ DEVMETHOD(cryptodev_process, swcr_process),
++};
++
++#define debug swcr_debug
++int swcr_debug = 0;
++module_param(swcr_debug, int, 0644);
++MODULE_PARM_DESC(swcr_debug, "Enable debug");
++
++/*
++ * Generate a new software session.
++ */
++static int
++swcr_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri)
++{
++ struct swcr_data **swd;
++ u_int32_t i;
++ int error;
++ char *algo;
++ int mode, sw_type;
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (sid == NULL || cri == NULL) {
++ dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ if (swcr_sessions) {
++ for (i = 1; i < swcr_sesnum; i++)
++ if (swcr_sessions[i] == NULL)
++ break;
++ } else
++ i = 1; /* NB: to silence compiler warning */
++
++ if (swcr_sessions == NULL || i == swcr_sesnum) {
++ if (swcr_sessions == NULL) {
++ i = 1; /* We leave swcr_sessions[0] empty */
++ swcr_sesnum = CRYPTO_SW_SESSIONS;
++ } else
++ swcr_sesnum *= 2;
++
++ swd = kmalloc(swcr_sesnum * sizeof(struct swcr_data *), SLAB_ATOMIC);
++ if (swd == NULL) {
++ /* Reset session number */
++ if (swcr_sesnum == CRYPTO_SW_SESSIONS)
++ swcr_sesnum = 0;
++ else
++ swcr_sesnum /= 2;
++ dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++ memset(swd, 0, swcr_sesnum * sizeof(struct swcr_data *));
++
++ /* Copy existing sessions */
++ if (swcr_sessions) {
++ memcpy(swd, swcr_sessions,
++ (swcr_sesnum / 2) * sizeof(struct swcr_data *));
++ kfree(swcr_sessions);
++ }
++
++ swcr_sessions = swd;
++ }
++
++ swd = &swcr_sessions[i];
++ *sid = i;
++
++ while (cri) {
++ *swd = (struct swcr_data *) kmalloc(sizeof(struct swcr_data),
++ SLAB_ATOMIC);
++ if (*swd == NULL) {
++ swcr_freesession(NULL, i);
++ dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++ memset(*swd, 0, sizeof(struct swcr_data));
++
++ if (cri->cri_alg > CRYPTO_ALGORITHM_MAX) {
++ printk("cryptosoft: Unknown algorithm 0x%x\n", cri->cri_alg);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++
++ algo = crypto_details[cri->cri_alg].alg_name;
++ if (!algo || !*algo) {
++ printk("cryptosoft: Unsupported algorithm 0x%x\n", cri->cri_alg);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++
++ mode = crypto_details[cri->cri_alg].mode;
++ sw_type = crypto_details[cri->cri_alg].sw_type;
++
++ /* Algorithm specific configuration */
++ switch (cri->cri_alg) {
++ case CRYPTO_NULL_CBC:
++ cri->cri_klen = 0; /* make it work with crypto API */
++ break;
++ default:
++ break;
++ }
++
++ if (sw_type == SW_TYPE_BLKCIPHER) {
++ dprintk("%s crypto_alloc_blkcipher(%s, 0x%x)\n", __FUNCTION__,
++ algo, mode);
++
++ (*swd)->sw_tfm = crypto_blkcipher_tfm(
++ crypto_alloc_blkcipher(algo, 0,
++ CRYPTO_ALG_ASYNC));
++ if (!(*swd)->sw_tfm) {
++ dprintk("cryptosoft: crypto_alloc_blkcipher failed(%s,0x%x)\n",
++ algo,mode);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++
++ if (debug) {
++ dprintk("%s key:cri->cri_klen=%d,(cri->cri_klen + 7)/8=%d",
++ __FUNCTION__,cri->cri_klen,(cri->cri_klen + 7)/8);
++ for (i = 0; i < (cri->cri_klen + 7) / 8; i++)
++ {
++ dprintk("%s0x%x", (i % 8) ? " " : "\n ",cri->cri_key[i]);
++ }
++ dprintk("\n");
++ }
++ error = crypto_blkcipher_setkey(
++ crypto_blkcipher_cast((*swd)->sw_tfm), cri->cri_key,
++ (cri->cri_klen + 7) / 8);
++ if (error) {
++ printk("cryptosoft: setkey failed %d (crt_flags=0x%x)\n", error,
++ (*swd)->sw_tfm->crt_flags);
++ swcr_freesession(NULL, i);
++ return error;
++ }
++ } else if (sw_type == SW_TYPE_HMAC || sw_type == SW_TYPE_HASH) {
++ dprintk("%s crypto_alloc_hash(%s, 0x%x)\n", __FUNCTION__,
++ algo, mode);
++
++ (*swd)->sw_tfm = crypto_hash_tfm(
++ crypto_alloc_hash(algo, 0, CRYPTO_ALG_ASYNC));
++
++ if (!(*swd)->sw_tfm) {
++ dprintk("cryptosoft: crypto_alloc_hash failed(%s,0x%x)\n",
++ algo, mode);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++
++ (*swd)->u.hmac.sw_klen = (cri->cri_klen + 7) / 8;
++ (*swd)->u.hmac.sw_key = (char *)kmalloc((*swd)->u.hmac.sw_klen,
++ SLAB_ATOMIC);
++ if ((*swd)->u.hmac.sw_key == NULL) {
++ swcr_freesession(NULL, i);
++ dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++ memcpy((*swd)->u.hmac.sw_key, cri->cri_key, (*swd)->u.hmac.sw_klen);
++ if (cri->cri_mlen) {
++ (*swd)->u.hmac.sw_mlen = cri->cri_mlen;
++ } else {
++ (*swd)->u.hmac.sw_mlen =
++ crypto_hash_digestsize(
++ crypto_hash_cast((*swd)->sw_tfm));
++ }
++ } else if (sw_type == SW_TYPE_COMP) {
++ (*swd)->sw_tfm = crypto_comp_tfm(
++ crypto_alloc_comp(algo, 0, CRYPTO_ALG_ASYNC));
++ if (!(*swd)->sw_tfm) {
++ dprintk("cryptosoft: crypto_alloc_comp failed(%s,0x%x)\n",
++ algo, mode);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++ (*swd)->u.sw_comp_buf = kmalloc(CRYPTO_MAX_DATA_LEN, SLAB_ATOMIC);
++ if ((*swd)->u.sw_comp_buf == NULL) {
++ swcr_freesession(NULL, i);
++ dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++ } else {
++ printk("cryptosoft: Unhandled sw_type %d\n", sw_type);
++ swcr_freesession(NULL, i);
++ return EINVAL;
++ }
++
++ (*swd)->sw_alg = cri->cri_alg;
++ (*swd)->sw_type = sw_type;
++
++ cri = cri->cri_next;
++ swd = &((*swd)->sw_next);
++ }
++ return 0;
++}
++
++/*
++ * Free a session.
++ */
++static int
++swcr_freesession(device_t dev, u_int64_t tid)
++{
++ struct swcr_data *swd;
++ u_int32_t sid = CRYPTO_SESID2LID(tid);
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (sid > swcr_sesnum || swcr_sessions == NULL ||
++ swcr_sessions[sid] == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return(EINVAL);
++ }
++
++ /* Silently accept and return */
++ if (sid == 0)
++ return(0);
++
++ while ((swd = swcr_sessions[sid]) != NULL) {
++ swcr_sessions[sid] = swd->sw_next;
++ if (swd->sw_tfm)
++ crypto_free_tfm(swd->sw_tfm);
++ if (swd->sw_type == SW_TYPE_COMP) {
++ if (swd->u.sw_comp_buf)
++ kfree(swd->u.sw_comp_buf);
++ } else {
++ if (swd->u.hmac.sw_key)
++ kfree(swd->u.hmac.sw_key);
++ }
++ kfree(swd);
++ }
++ return 0;
++}
++
++/*
++ * Process a software request.
++ */
++static int
++swcr_process(device_t dev, struct cryptop *crp, int hint)
++{
++ struct cryptodesc *crd;
++ struct swcr_data *sw;
++ u_int32_t lid;
++#define SCATTERLIST_MAX 16
++ struct scatterlist sg[SCATTERLIST_MAX];
++ int sg_num, sg_len, skip;
++ struct sk_buff *skb = NULL;
++ struct uio *uiop = NULL;
++
++ dprintk("%s()\n", __FUNCTION__);
++ /* Sanity check */
++ if (crp == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ crp->crp_etype = 0;
++
++ if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ crp->crp_etype = EINVAL;
++ goto done;
++ }
++
++ lid = crp->crp_sid & 0xffffffff;
++ if (lid >= swcr_sesnum || lid == 0 || swcr_sessions == NULL ||
++ swcr_sessions[lid] == NULL) {
++ crp->crp_etype = ENOENT;
++ dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
++ goto done;
++ }
++
++ /*
++ * do some error checking outside of the loop for SKB and IOV processing
++ * this leaves us with valid skb or uiop pointers for later
++ */
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ skb = (struct sk_buff *) crp->crp_buf;
++ if (skb_shinfo(skb)->nr_frags >= SCATTERLIST_MAX) {
++ printk("%s,%d: %d nr_frags > SCATTERLIST_MAX", __FILE__, __LINE__,
++ skb_shinfo(skb)->nr_frags);
++ goto done;
++ }
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ uiop = (struct uio *) crp->crp_buf;
++ if (uiop->uio_iovcnt > SCATTERLIST_MAX) {
++ printk("%s,%d: %d uio_iovcnt > SCATTERLIST_MAX", __FILE__, __LINE__,
++ uiop->uio_iovcnt);
++ goto done;
++ }
++ }
++
++ /* Go through crypto descriptors, processing as we go */
++ for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
++ /*
++ * Find the crypto context.
++ *
++ * XXX Note that the logic here prevents us from having
++ * XXX the same algorithm multiple times in a session
++ * XXX (or rather, we can but it won't give us the right
++ * XXX results). To do that, we'd need some way of differentiating
++ * XXX between the various instances of an algorithm (so we can
++ * XXX locate the correct crypto context).
++ */
++ for (sw = swcr_sessions[lid]; sw && sw->sw_alg != crd->crd_alg;
++ sw = sw->sw_next)
++ ;
++
++ /* No such context ? */
++ if (sw == NULL) {
++ crp->crp_etype = EINVAL;
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ goto done;
++ }
++
++ skip = crd->crd_skip;
++
++ /*
++ * setup the SG list skip from the start of the buffer
++ */
++ memset(sg, 0, sizeof(sg));
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ int i, len;
++
++ sg_num = 0;
++ sg_len = 0;
++
++ if (skip < skb_headlen(skb)) {
++ len = skb_headlen(skb) - skip;
++ if (len + sg_len > crd->crd_len)
++ len = crd->crd_len - sg_len;
++ sg_set_page(&sg[sg_num],
++ virt_to_page(skb->data + skip), len,
++ offset_in_page(skb->data + skip));
++ sg_len += len;
++ sg_num++;
++ skip = 0;
++ } else
++ skip -= skb_headlen(skb);
++
++ for (i = 0; sg_len < crd->crd_len &&
++ i < skb_shinfo(skb)->nr_frags &&
++ sg_num < SCATTERLIST_MAX; i++) {
++ if (skip < skb_shinfo(skb)->frags[i].size) {
++ len = skb_shinfo(skb)->frags[i].size - skip;
++ if (len + sg_len > crd->crd_len)
++ len = crd->crd_len - sg_len;
++ sg_set_page(&sg[sg_num],
++ skb_shinfo(skb)->frags[i].page,
++ len,
++ skb_shinfo(skb)->frags[i].page_offset + skip);
++ sg_len += len;
++ sg_num++;
++ skip = 0;
++ } else
++ skip -= skb_shinfo(skb)->frags[i].size;
++ }
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ int len;
++
++ sg_len = 0;
++ for (sg_num = 0; sg_len <= crd->crd_len &&
++ sg_num < uiop->uio_iovcnt &&
++ sg_num < SCATTERLIST_MAX; sg_num++) {
++ if (skip <= uiop->uio_iov[sg_num].iov_len) {
++ len = uiop->uio_iov[sg_num].iov_len - skip;
++ if (len + sg_len > crd->crd_len)
++ len = crd->crd_len - sg_len;
++ sg_set_page(&sg[sg_num],
++ virt_to_page(uiop->uio_iov[sg_num].iov_base+skip),
++ len,
++ offset_in_page(uiop->uio_iov[sg_num].iov_base+skip));
++ sg_len += len;
++ skip = 0;
++ } else
++ skip -= uiop->uio_iov[sg_num].iov_len;
++ }
++ } else {
++ sg_len = (crp->crp_ilen - skip);
++ if (sg_len > crd->crd_len)
++ sg_len = crd->crd_len;
++ sg_set_page(&sg[0], virt_to_page(crp->crp_buf + skip),
++ sg_len, offset_in_page(crp->crp_buf + skip));
++ sg_num = 1;
++ }
++
++
++ switch (sw->sw_type) {
++ case SW_TYPE_BLKCIPHER: {
++ unsigned char iv[EALG_MAX_BLOCK_LEN];
++ unsigned char *ivp = iv;
++ int ivsize =
++ crypto_blkcipher_ivsize(crypto_blkcipher_cast(sw->sw_tfm));
++ struct blkcipher_desc desc;
++
++ if (sg_len < crypto_blkcipher_blocksize(
++ crypto_blkcipher_cast(sw->sw_tfm))) {
++ crp->crp_etype = EINVAL;
++ dprintk("%s,%d: EINVAL len %d < %d\n", __FILE__, __LINE__,
++ sg_len, crypto_blkcipher_blocksize(
++ crypto_blkcipher_cast(sw->sw_tfm)));
++ goto done;
++ }
++
++ if (ivsize > sizeof(iv)) {
++ crp->crp_etype = EINVAL;
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ goto done;
++ }
++
++ if (crd->crd_flags & CRD_F_KEY_EXPLICIT) {
++ int i, error;
++
++ if (debug) {
++ dprintk("%s key:", __FUNCTION__);
++ for (i = 0; i < (crd->crd_klen + 7) / 8; i++)
++ dprintk("%s0x%x", (i % 8) ? " " : "\n ",
++ crd->crd_key[i]);
++ dprintk("\n");
++ }
++ error = crypto_blkcipher_setkey(
++ crypto_blkcipher_cast(sw->sw_tfm), crd->crd_key,
++ (crd->crd_klen + 7) / 8);
++ if (error) {
++ dprintk("cryptosoft: setkey failed %d (crt_flags=0x%x)\n",
++ error, sw->sw_tfm->crt_flags);
++ crp->crp_etype = -error;
++ }
++ }
++
++ memset(&desc, 0, sizeof(desc));
++ desc.tfm = crypto_blkcipher_cast(sw->sw_tfm);
++
++ if (crd->crd_flags & CRD_F_ENCRYPT) { /* encrypt */
++
++ if (crd->crd_flags & CRD_F_IV_EXPLICIT) {
++ ivp = crd->crd_iv;
++ } else {
++ get_random_bytes(ivp, ivsize);
++ }
++ /*
++ * do we have to copy the IV back to the buffer ?
++ */
++ if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) {
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject, ivsize, (caddr_t)ivp);
++ }
++ desc.info = ivp;
++ crypto_blkcipher_encrypt_iv(&desc, sg, sg, sg_len);
++
++ } else { /*decrypt */
++
++ if (crd->crd_flags & CRD_F_IV_EXPLICIT) {
++ ivp = crd->crd_iv;
++ } else {
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject, ivsize, (caddr_t)ivp);
++ }
++ desc.info = ivp;
++ crypto_blkcipher_decrypt_iv(&desc, sg, sg, sg_len);
++ }
++ } break;
++ case SW_TYPE_HMAC:
++ case SW_TYPE_HASH:
++ {
++ char result[HASH_MAX_LEN];
++ struct hash_desc desc;
++
++ /* check we have room for the result */
++ if (crp->crp_ilen - crd->crd_inject < sw->u.hmac.sw_mlen) {
++ dprintk(
++ "cryptosoft: EINVAL crp_ilen=%d, len=%d, inject=%d digestsize=%d\n",
++ crp->crp_ilen, crd->crd_skip + sg_len, crd->crd_inject,
++ sw->u.hmac.sw_mlen);
++ crp->crp_etype = EINVAL;
++ goto done;
++ }
++
++ memset(&desc, 0, sizeof(desc));
++ desc.tfm = crypto_hash_cast(sw->sw_tfm);
++
++ memset(result, 0, sizeof(result));
++
++ if (sw->sw_type == SW_TYPE_HMAC) {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
++ crypto_hmac(sw->sw_tfm, sw->u.hmac.sw_key, &sw->u.hmac.sw_klen,
++ sg, sg_num, result);
++#else
++ crypto_hash_setkey(desc.tfm, sw->u.hmac.sw_key,
++ sw->u.hmac.sw_klen);
++ crypto_hash_digest(&desc, sg, sg_len, result);
++#endif /* #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) */
++
++ } else { /* SW_TYPE_HASH */
++ crypto_hash_digest(&desc, sg, sg_len, result);
++ }
++
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject, sw->u.hmac.sw_mlen, result);
++ }
++ break;
++
++ case SW_TYPE_COMP: {
++ void *ibuf = NULL;
++ void *obuf = sw->u.sw_comp_buf;
++ int ilen = sg_len, olen = CRYPTO_MAX_DATA_LEN;
++ int ret = 0;
++
++ /*
++ * we need to use an additional copy if there is more than one
++ * input chunk since the kernel comp routines do not handle
++ * SG yet. Otherwise we just use the input buffer as is.
++ * Rather than allocate another buffer we just split the tmp
++ * buffer we already have.
++ * Perhaps we should just use zlib directly ?
++ */
++ if (sg_num > 1) {
++ int blk;
++
++ ibuf = obuf;
++ for (blk = 0; blk < sg_num; blk++) {
++ memcpy(obuf, sg_virt(&sg[blk]),
++ sg[blk].length);
++ obuf += sg[blk].length;
++ }
++ olen -= sg_len;
++ } else
++ ibuf = sg_virt(&sg[0]);
++
++ if (crd->crd_flags & CRD_F_ENCRYPT) { /* compress */
++ ret = crypto_comp_compress(crypto_comp_cast(sw->sw_tfm),
++ ibuf, ilen, obuf, &olen);
++ if (!ret && olen > crd->crd_len) {
++ dprintk("cryptosoft: ERANGE compress %d into %d\n",
++ crd->crd_len, olen);
++ if (swcr_fail_if_compression_grows)
++ ret = ERANGE;
++ }
++ } else { /* decompress */
++ ret = crypto_comp_decompress(crypto_comp_cast(sw->sw_tfm),
++ ibuf, ilen, obuf, &olen);
++ if (!ret && (olen + crd->crd_inject) > crp->crp_olen) {
++ dprintk("cryptosoft: ETOOSMALL decompress %d into %d, "
++ "space for %d,at offset %d\n",
++ crd->crd_len, olen, crp->crp_olen, crd->crd_inject);
++ ret = ETOOSMALL;
++ }
++ }
++ if (ret)
++ dprintk("%s,%d: ret = %d\n", __FILE__, __LINE__, ret);
++
++ /*
++ * on success copy result back,
++ * linux crpyto API returns -errno, we need to fix that
++ */
++ crp->crp_etype = ret < 0 ? -ret : ret;
++ if (ret == 0) {
++ /* copy back the result and return it's size */
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject, olen, obuf);
++ crp->crp_olen = olen;
++ }
++
++
++ } break;
++
++ default:
++ /* Unknown/unsupported algorithm */
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ crp->crp_etype = EINVAL;
++ goto done;
++ }
++ }
++
++done:
++ crypto_done(crp);
++ return 0;
++}
++
++static int
++cryptosoft_init(void)
++{
++ int i, sw_type, mode;
++ char *algo;
++
++ dprintk("%s(%p)\n", __FUNCTION__, cryptosoft_init);
++
++ softc_device_init(&swcr_softc, "cryptosoft", 0, swcr_methods);
++
++ swcr_id = crypto_get_driverid(softc_get_device(&swcr_softc),
++ CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_SYNC);
++ if (swcr_id < 0) {
++ printk("Software crypto device cannot initialize!");
++ return -ENODEV;
++ }
++
++#define REGISTER(alg) \
++ crypto_register(swcr_id, alg, 0,0);
++
++ for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; ++i)
++ {
++
++ algo = crypto_details[i].alg_name;
++ if (!algo || !*algo)
++ {
++ dprintk("%s:Algorithm %d not supported\n", __FUNCTION__, i);
++ continue;
++ }
++
++ mode = crypto_details[i].mode;
++ sw_type = crypto_details[i].sw_type;
++
++ switch (sw_type)
++ {
++ case SW_TYPE_CIPHER:
++ if (crypto_has_cipher(algo, 0, CRYPTO_ALG_ASYNC))
++ {
++ REGISTER(i);
++ }
++ else
++ {
++ dprintk("%s:CIPHER algorithm %d:'%s' not supported\n",
++ __FUNCTION__, i, algo);
++ }
++ break;
++ case SW_TYPE_HMAC:
++ if (crypto_has_hash(algo, 0, CRYPTO_ALG_ASYNC))
++ {
++ REGISTER(i);
++ }
++ else
++ {
++ dprintk("%s:HMAC algorithm %d:'%s' not supported\n",
++ __FUNCTION__, i, algo);
++ }
++ break;
++ case SW_TYPE_HASH:
++ if (crypto_has_hash(algo, 0, CRYPTO_ALG_ASYNC))
++ {
++ REGISTER(i);
++ }
++ else
++ {
++ dprintk("%s:HASH algorithm %d:'%s' not supported\n",
++ __FUNCTION__, i, algo);
++ }
++ break;
++ case SW_TYPE_COMP:
++ if (crypto_has_comp(algo, 0, CRYPTO_ALG_ASYNC))
++ {
++ REGISTER(i);
++ }
++ else
++ {
++ dprintk("%s:COMP algorithm %d:'%s' not supported\n",
++ __FUNCTION__, i, algo);
++ }
++ break;
++ case SW_TYPE_BLKCIPHER:
++ if (crypto_has_blkcipher(algo, 0, CRYPTO_ALG_ASYNC))
++ {
++ REGISTER(i);
++ }
++ else
++ {
++ dprintk("%s:BLKCIPHER algorithm %d:'%s' not supported\n",
++ __FUNCTION__, i, algo);
++ }
++ break;
++ default:
++ dprintk(
++ "%s:Algorithm Type %d not supported (algorithm %d:'%s')\n",
++ __FUNCTION__, sw_type, i, algo);
++ break;
++ }
++ }
++
++ return(0);
++}
++
++static void
++cryptosoft_exit(void)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ crypto_unregister_all(swcr_id);
++ swcr_id = -1;
++}
++
++module_init(cryptosoft_init);
++module_exit(cryptosoft_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("Cryptosoft (OCF module for kernel crypto)");
+diff -Nur linux-2.6.30.orig/crypto/ocf/ep80579/icp_asym.c linux-2.6.30/crypto/ocf/ep80579/icp_asym.c
+--- linux-2.6.30.orig/crypto/ocf/ep80579/icp_asym.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ep80579/icp_asym.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1375 @@
++/***************************************************************************
++ *
++ * This file is provided under a dual BSD/GPLv2 license. When using or
++ * redistributing this file, you may do so under either license.
++ *
++ * GPL LICENSE SUMMARY
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of version 2 of the GNU General Public License as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
++ * The full GNU General Public License is included in this distribution
++ * in the file called LICENSE.GPL.
++ *
++ * Contact Information:
++ * Intel Corporation
++ *
++ * BSD LICENSE
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * * Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * * Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in
++ * the documentation and/or other materials provided with the
++ * distribution.
++ * * Neither the name of Intel Corporation nor the names of its
++ * contributors may be used to endorse or promote products derived
++ * from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
++ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
++ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
++ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
++ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
++ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ *
++ * version: Security.L.1.0.130
++ *
++ ***************************************************************************/
++
++#include "icp_ocf.h"
++
++/*The following define values (containing the word 'INDEX') are used to find
++the index of each input buffer of the crypto_kop struct (see OCF cryptodev.h).
++These values were found through analysis of the OCF OpenSSL patch. If the
++calling program uses different input buffer positions, these defines will have
++to be changed.*/
++
++/*DIFFIE HELLMAN buffer index values*/
++#define ICP_DH_KRP_PARAM_PRIME_INDEX (0)
++#define ICP_DH_KRP_PARAM_BASE_INDEX (1)
++#define ICP_DH_KRP_PARAM_PRIVATE_VALUE_INDEX (2)
++#define ICP_DH_KRP_PARAM_RESULT_INDEX (3)
++
++/*MOD EXP buffer index values*/
++#define ICP_MOD_EXP_KRP_PARAM_BASE_INDEX (0)
++#define ICP_MOD_EXP_KRP_PARAM_EXPONENT_INDEX (1)
++#define ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX (2)
++#define ICP_MOD_EXP_KRP_PARAM_RESULT_INDEX (3)
++
++#define SINGLE_BYTE_VALUE (4)
++
++/*MOD EXP CRT buffer index values*/
++#define ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_P_INDEX (0)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_Q_INDEX (1)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_I_INDEX (2)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DP_INDEX (3)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DQ_INDEX (4)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_COEFF_QINV_INDEX (5)
++#define ICP_MOD_EXP_CRT_KRP_PARAM_RESULT_INDEX (6)
++
++/*DSA sign buffer index values*/
++#define ICP_DSA_SIGN_KRP_PARAM_DGST_INDEX (0)
++#define ICP_DSA_SIGN_KRP_PARAM_PRIME_P_INDEX (1)
++#define ICP_DSA_SIGN_KRP_PARAM_PRIME_Q_INDEX (2)
++#define ICP_DSA_SIGN_KRP_PARAM_G_INDEX (3)
++#define ICP_DSA_SIGN_KRP_PARAM_X_INDEX (4)
++#define ICP_DSA_SIGN_KRP_PARAM_R_RESULT_INDEX (5)
++#define ICP_DSA_SIGN_KRP_PARAM_S_RESULT_INDEX (6)
++
++/*DSA verify buffer index values*/
++#define ICP_DSA_VERIFY_KRP_PARAM_DGST_INDEX (0)
++#define ICP_DSA_VERIFY_KRP_PARAM_PRIME_P_INDEX (1)
++#define ICP_DSA_VERIFY_KRP_PARAM_PRIME_Q_INDEX (2)
++#define ICP_DSA_VERIFY_KRP_PARAM_G_INDEX (3)
++#define ICP_DSA_VERIFY_KRP_PARAM_PUBKEY_INDEX (4)
++#define ICP_DSA_VERIFY_KRP_PARAM_SIG_R_INDEX (5)
++#define ICP_DSA_VERIFY_KRP_PARAM_SIG_S_INDEX (6)
++
++/*DSA sign prime Q vs random number K size check values*/
++#define DONT_RUN_LESS_THAN_CHECK (0)
++#define FAIL_A_IS_GREATER_THAN_B (1)
++#define FAIL_A_IS_EQUAL_TO_B (1)
++#define SUCCESS_A_IS_LESS_THAN_B (0)
++#define DSA_SIGN_RAND_GEN_VAL_CHECK_MAX_ITERATIONS (500)
++
++/* We need to set a cryptokp success value just in case it is set or allocated
++ and not set to zero outside of this module */
++#define CRYPTO_OP_SUCCESS (0)
++
++static int icp_ocfDrvDHComputeKey(struct cryptkop *krp);
++
++static int icp_ocfDrvModExp(struct cryptkop *krp);
++
++static int icp_ocfDrvModExpCRT(struct cryptkop *krp);
++
++static int
++icp_ocfDrvCheckALessThanB(CpaFlatBuffer * pK, CpaFlatBuffer * pQ, int *doCheck);
++
++static int icp_ocfDrvDsaSign(struct cryptkop *krp);
++
++static int icp_ocfDrvDsaVerify(struct cryptkop *krp);
++
++static void
++icp_ocfDrvDhP1CallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaFlatBuffer * pLocalOctetStringPV);
++
++static void
++icp_ocfDrvModExpCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaFlatBuffer * pResult);
++
++static void
++icp_ocfDrvModExpCRTCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaFlatBuffer * pOutputData);
++
++static void
++icp_ocfDrvDsaVerifyCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaBoolean verifyStatus);
++
++static void
++icp_ocfDrvDsaRSSignCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData,
++ CpaBoolean protocolStatus,
++ CpaFlatBuffer * pR, CpaFlatBuffer * pS);
++
++/* Name : icp_ocfDrvPkeProcess
++ *
++ * Description : This function will choose which PKE process to follow
++ * based on the input arguments
++ */
++int icp_ocfDrvPkeProcess(device_t dev, struct cryptkop *krp, int hint)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++
++ if (NULL == krp) {
++ DPRINTK("%s(): Invalid input parameters, cryptkop = %p\n",
++ __FUNCTION__, krp);
++ return EINVAL;
++ }
++
++ if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) {
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ switch (krp->krp_op) {
++ case CRK_DH_COMPUTE_KEY:
++ DPRINTK("%s() doing DH_COMPUTE_KEY\n", __FUNCTION__);
++ lacStatus = icp_ocfDrvDHComputeKey(krp);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_ocfDrvDHComputeKey failed "
++ "(%d).\n", __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ break;
++
++ case CRK_MOD_EXP:
++ DPRINTK("%s() doing MOD_EXP \n", __FUNCTION__);
++ lacStatus = icp_ocfDrvModExp(krp);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_ocfDrvModExp failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ break;
++
++ case CRK_MOD_EXP_CRT:
++ DPRINTK("%s() doing MOD_EXP_CRT \n", __FUNCTION__);
++ lacStatus = icp_ocfDrvModExpCRT(krp);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_ocfDrvModExpCRT "
++ "failed (%d).\n", __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ break;
++
++ case CRK_DSA_SIGN:
++ DPRINTK("%s() doing DSA_SIGN \n", __FUNCTION__);
++ lacStatus = icp_ocfDrvDsaSign(krp);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_ocfDrvDsaSign "
++ "failed (%d).\n", __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ break;
++
++ case CRK_DSA_VERIFY:
++ DPRINTK("%s() doing DSA_VERIFY \n", __FUNCTION__);
++ lacStatus = icp_ocfDrvDsaVerify(krp);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_ocfDrvDsaVerify "
++ "failed (%d).\n", __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ return ECANCELED;
++ }
++
++ break;
++
++ default:
++ EPRINTK("%s(): Asymettric function not "
++ "supported (%d).\n", __FUNCTION__, krp->krp_op);
++ krp->krp_status = EOPNOTSUPP;
++ return EOPNOTSUPP;
++ }
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvSwapBytes
++ *
++ * Description : This function is used to swap the byte order of a buffer.
++ * It has been seen that in general we are passed little endian byte order
++ * buffers, but LAC only accepts big endian byte order buffers.
++ */
++static void inline
++icp_ocfDrvSwapBytes(u_int8_t * num, u_int32_t buff_len_bytes)
++{
++
++ int i;
++ u_int8_t *end_ptr;
++ u_int8_t hold_val;
++
++ end_ptr = num + (buff_len_bytes - 1);
++ buff_len_bytes = buff_len_bytes >> 1;
++ for (i = 0; i < buff_len_bytes; i++) {
++ hold_val = *num;
++ *num = *end_ptr;
++ num++;
++ *end_ptr = hold_val;
++ end_ptr--;
++ }
++}
++
++/* Name : icp_ocfDrvDHComputeKey
++ *
++ * Description : This function will map Diffie Hellman calls from OCF
++ * to the LAC API. OCF uses this function for Diffie Hellman Phase1 and
++ * Phase2. LAC has a separate Diffie Hellman Phase2 call, however both phases
++ * break down to a modular exponentiation.
++ */
++static int icp_ocfDrvDHComputeKey(struct cryptkop *krp)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ void *callbackTag = NULL;
++ CpaCyDhPhase1KeyGenOpData *pPhase1OpData = NULL;
++ CpaFlatBuffer *pLocalOctetStringPV = NULL;
++ uint32_t dh_prime_len_bytes = 0, dh_prime_len_bits = 0;
++
++ /* Input checks - check prime is a multiple of 8 bits to allow for
++ allocation later */
++ dh_prime_len_bits =
++ (krp->krp_param[ICP_DH_KRP_PARAM_PRIME_INDEX].crp_nbits);
++
++ /* LAC can reject prime lengths based on prime key sizes, we just
++ need to make sure we can allocate space for the base and
++ exponent buffers correctly */
++ if ((dh_prime_len_bits % NUM_BITS_IN_BYTE) != 0) {
++ APRINTK("%s(): Warning Prime number buffer size is not a "
++ "multiple of 8 bits\n", __FUNCTION__);
++ }
++
++ /* Result storage space should be the same size as the prime as this
++ value can take up the same amount of storage space */
++ if (dh_prime_len_bits !=
++ krp->krp_param[ICP_DH_KRP_PARAM_RESULT_INDEX].crp_nbits) {
++ DPRINTK("%s(): Return Buffer must be the same size "
++ "as the Prime buffer\n", __FUNCTION__);
++ krp->krp_status = EINVAL;
++ return EINVAL;
++ }
++ /* Switch to size in bytes */
++ BITS_TO_BYTES(dh_prime_len_bytes, dh_prime_len_bits);
++
++ callbackTag = krp;
++
++ pPhase1OpData = kmem_cache_zalloc(drvDH_zone, GFP_KERNEL);
++ if (NULL == pPhase1OpData) {
++ APRINTK("%s():Failed to get memory for key gen data\n",
++ __FUNCTION__);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ pLocalOctetStringPV = kmem_cache_zalloc(drvFlatBuffer_zone, GFP_KERNEL);
++ if (NULL == pLocalOctetStringPV) {
++ APRINTK("%s():Failed to get memory for pLocalOctetStringPV\n",
++ __FUNCTION__);
++ kmem_cache_free(drvDH_zone, pPhase1OpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ /* Link parameters */
++ pPhase1OpData->primeP.pData =
++ krp->krp_param[ICP_DH_KRP_PARAM_PRIME_INDEX].crp_p;
++
++ pPhase1OpData->primeP.dataLenInBytes = dh_prime_len_bytes;
++
++ icp_ocfDrvSwapBytes(pPhase1OpData->primeP.pData, dh_prime_len_bytes);
++
++ pPhase1OpData->baseG.pData =
++ krp->krp_param[ICP_DH_KRP_PARAM_BASE_INDEX].crp_p;
++
++ BITS_TO_BYTES(pPhase1OpData->baseG.dataLenInBytes,
++ krp->krp_param[ICP_DH_KRP_PARAM_BASE_INDEX].crp_nbits);
++
++ icp_ocfDrvSwapBytes(pPhase1OpData->baseG.pData,
++ pPhase1OpData->baseG.dataLenInBytes);
++
++ pPhase1OpData->privateValueX.pData =
++ krp->krp_param[ICP_DH_KRP_PARAM_PRIVATE_VALUE_INDEX].crp_p;
++
++ BITS_TO_BYTES(pPhase1OpData->privateValueX.dataLenInBytes,
++ krp->krp_param[ICP_DH_KRP_PARAM_PRIVATE_VALUE_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(pPhase1OpData->privateValueX.pData,
++ pPhase1OpData->privateValueX.dataLenInBytes);
++
++ /* Output parameters */
++ pLocalOctetStringPV->pData =
++ krp->krp_param[ICP_DH_KRP_PARAM_RESULT_INDEX].crp_p;
++
++ BITS_TO_BYTES(pLocalOctetStringPV->dataLenInBytes,
++ krp->krp_param[ICP_DH_KRP_PARAM_RESULT_INDEX].crp_nbits);
++
++ lacStatus = cpaCyDhKeyGenPhase1(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvDhP1CallBack,
++ callbackTag, pPhase1OpData,
++ pLocalOctetStringPV);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): DH Phase 1 Key Gen failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ icp_ocfDrvFreeFlatBuffer(pLocalOctetStringPV);
++ kmem_cache_free(drvDH_zone, pPhase1OpData);
++ }
++
++ return lacStatus;
++}
++
++/* Name : icp_ocfDrvModExp
++ *
++ * Description : This function will map ordinary Modular Exponentiation calls
++ * from OCF to the LAC API.
++ *
++ */
++static int icp_ocfDrvModExp(struct cryptkop *krp)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ void *callbackTag = NULL;
++ CpaCyLnModExpOpData *pModExpOpData = NULL;
++ CpaFlatBuffer *pResult = NULL;
++
++ if ((krp->krp_param[ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX].crp_nbits %
++ NUM_BITS_IN_BYTE) != 0) {
++ DPRINTK("%s(): Warning - modulus buffer size (%d) is not a "
++ "multiple of 8 bits\n", __FUNCTION__,
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX].
++ crp_nbits);
++ }
++
++ /* Result storage space should be the same size as the prime as this
++ value can take up the same amount of storage space */
++ if (krp->krp_param[ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX].crp_nbits >
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_RESULT_INDEX].crp_nbits) {
++ APRINTK("%s(): Return Buffer size must be the same or"
++ " greater than the Modulus buffer\n", __FUNCTION__);
++ krp->krp_status = EINVAL;
++ return EINVAL;
++ }
++
++ callbackTag = krp;
++
++ pModExpOpData = kmem_cache_zalloc(drvLnModExp_zone, GFP_KERNEL);
++ if (NULL == pModExpOpData) {
++ APRINTK("%s():Failed to get memory for key gen data\n",
++ __FUNCTION__);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ pResult = kmem_cache_zalloc(drvFlatBuffer_zone, GFP_KERNEL);
++ if (NULL == pResult) {
++ APRINTK("%s():Failed to get memory for ModExp result\n",
++ __FUNCTION__);
++ kmem_cache_free(drvLnModExp_zone, pModExpOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ /* Link parameters */
++ pModExpOpData->modulus.pData =
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX].crp_p;
++ BITS_TO_BYTES(pModExpOpData->modulus.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_MODULUS_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(pModExpOpData->modulus.pData,
++ pModExpOpData->modulus.dataLenInBytes);
++
++ /*OCF patch to Openswan Pluto regularly sends the base value as 2
++ bits in size. In this case, it has been found it is better to
++ use the base size memory space as the input buffer (if the number
++ is in bits is less than a byte, the number of bits is the input
++ value) */
++ if (krp->krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].crp_nbits <
++ NUM_BITS_IN_BYTE) {
++ DPRINTK("%s : base is small (%d)\n", __FUNCTION__, krp->
++ krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].crp_nbits);
++ pModExpOpData->base.dataLenInBytes = SINGLE_BYTE_VALUE;
++ pModExpOpData->base.pData =
++ (uint8_t *) & (krp->
++ krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].
++ crp_nbits);
++ *((uint32_t *) pModExpOpData->base.pData) =
++ htonl(*((uint32_t *) pModExpOpData->base.pData));
++
++ } else {
++
++ DPRINTK("%s : base is big (%d)\n", __FUNCTION__, krp->
++ krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].crp_nbits);
++ pModExpOpData->base.pData =
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].crp_p;
++ BITS_TO_BYTES(pModExpOpData->base.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(pModExpOpData->base.pData,
++ pModExpOpData->base.dataLenInBytes);
++ }
++
++ pModExpOpData->exponent.pData =
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_EXPONENT_INDEX].crp_p;
++ BITS_TO_BYTES(pModExpOpData->exponent.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_EXPONENT_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(pModExpOpData->exponent.pData,
++ pModExpOpData->exponent.dataLenInBytes);
++ /* Output parameters */
++ pResult->pData =
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_RESULT_INDEX].crp_p,
++ BITS_TO_BYTES(pResult->dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_KRP_PARAM_RESULT_INDEX].
++ crp_nbits);
++
++ lacStatus = cpaCyLnModExp(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvModExpCallBack,
++ callbackTag, pModExpOpData, pResult);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): Mod Exp Operation failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ icp_ocfDrvFreeFlatBuffer(pResult);
++ kmem_cache_free(drvLnModExp_zone, pModExpOpData);
++ }
++
++ return lacStatus;
++}
++
++/* Name : icp_ocfDrvModExpCRT
++ *
++ * Description : This function will map ordinary Modular Exponentiation Chinese
++ * Remainder Theorem implementaion calls from OCF to the LAC API.
++ *
++ * Note : Mod Exp CRT for this driver is accelerated through LAC RSA type 2
++ * decrypt operation. Therefore P and Q input values must always be prime
++ * numbers. Although basic primality checks are done in LAC, it is up to the
++ * user to do any correct prime number checking before passing the inputs.
++ */
++
++static int icp_ocfDrvModExpCRT(struct cryptkop *krp)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ CpaCyRsaDecryptOpData *rsaDecryptOpData = NULL;
++ void *callbackTag = NULL;
++ CpaFlatBuffer *pOutputData = NULL;
++
++ /*Parameter input checks are all done by LAC, no need to repeat
++ them here. */
++ callbackTag = krp;
++
++ rsaDecryptOpData = kmem_cache_zalloc(drvRSADecrypt_zone, GFP_KERNEL);
++ if (NULL == rsaDecryptOpData) {
++ APRINTK("%s():Failed to get memory"
++ " for MOD EXP CRT Op data struct\n", __FUNCTION__);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ rsaDecryptOpData->pRecipientPrivateKey
++ = kmem_cache_zalloc(drvRSAPrivateKey_zone, GFP_KERNEL);
++ if (NULL == rsaDecryptOpData->pRecipientPrivateKey) {
++ APRINTK("%s():Failed to get memory for MOD EXP CRT"
++ " private key values struct\n", __FUNCTION__);
++ kmem_cache_free(drvRSADecrypt_zone, rsaDecryptOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ rsaDecryptOpData->pRecipientPrivateKey->
++ version = CPA_CY_RSA_VERSION_TWO_PRIME;
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRepType = CPA_CY_RSA_PRIVATE_KEY_REP_TYPE_2;
++
++ pOutputData = kmem_cache_zalloc(drvFlatBuffer_zone, GFP_KERNEL);
++ if (NULL == pOutputData) {
++ APRINTK("%s():Failed to get memory"
++ " for MOD EXP CRT output data\n", __FUNCTION__);
++ kmem_cache_free(drvRSAPrivateKey_zone,
++ rsaDecryptOpData->pRecipientPrivateKey);
++ kmem_cache_free(drvRSADecrypt_zone, rsaDecryptOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ rsaDecryptOpData->pRecipientPrivateKey->
++ version = CPA_CY_RSA_VERSION_TWO_PRIME;
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRepType = CPA_CY_RSA_PRIVATE_KEY_REP_TYPE_2;
++
++ /* Link parameters */
++ rsaDecryptOpData->inputData.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_I_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->inputData.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_I_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->inputData.pData,
++ rsaDecryptOpData->inputData.dataLenInBytes);
++
++ rsaDecryptOpData->pRecipientPrivateKey->privateKeyRep2.prime1P.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_P_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->pRecipientPrivateKey->privateKeyRep2.
++ prime1P.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_P_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.prime1P.pData,
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.prime1P.dataLenInBytes);
++
++ rsaDecryptOpData->pRecipientPrivateKey->privateKeyRep2.prime2Q.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_Q_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->pRecipientPrivateKey->privateKeyRep2.
++ prime2Q.dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_PRIME_Q_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.prime2Q.pData,
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.prime2Q.dataLenInBytes);
++
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent1Dp.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DP_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->pRecipientPrivateKey->privateKeyRep2.
++ exponent1Dp.dataLenInBytes,
++ krp->
++ krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DP_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent1Dp.pData,
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent1Dp.dataLenInBytes);
++
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent2Dq.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DQ_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent2Dq.dataLenInBytes,
++ krp->
++ krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_EXPONENT_DQ_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent2Dq.pData,
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.exponent2Dq.dataLenInBytes);
++
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.coefficientQInv.pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_COEFF_QINV_INDEX].crp_p;
++ BITS_TO_BYTES(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.coefficientQInv.dataLenInBytes,
++ krp->
++ krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_COEFF_QINV_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.coefficientQInv.pData,
++ rsaDecryptOpData->pRecipientPrivateKey->
++ privateKeyRep2.coefficientQInv.dataLenInBytes);
++
++ /* Output Parameter */
++ pOutputData->pData =
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_RESULT_INDEX].crp_p;
++ BITS_TO_BYTES(pOutputData->dataLenInBytes,
++ krp->krp_param[ICP_MOD_EXP_CRT_KRP_PARAM_RESULT_INDEX].
++ crp_nbits);
++
++ lacStatus = cpaCyRsaDecrypt(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvModExpCRTCallBack,
++ callbackTag, rsaDecryptOpData, pOutputData);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): Mod Exp CRT Operation failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ icp_ocfDrvFreeFlatBuffer(pOutputData);
++ kmem_cache_free(drvRSAPrivateKey_zone,
++ rsaDecryptOpData->pRecipientPrivateKey);
++ kmem_cache_free(drvRSADecrypt_zone, rsaDecryptOpData);
++ }
++
++ return lacStatus;
++}
++
++/* Name : icp_ocfDrvCheckALessThanB
++ *
++ * Description : This function will check whether the first argument is less
++ * than the second. It is used to check whether the DSA RS sign Random K
++ * value is less than the Prime Q value (as defined in the specification)
++ *
++ */
++static int
++icp_ocfDrvCheckALessThanB(CpaFlatBuffer * pK, CpaFlatBuffer * pQ, int *doCheck)
++{
++
++ uint8_t *MSB_K = pK->pData;
++ uint8_t *MSB_Q = pQ->pData;
++ uint32_t buffer_lengths_in_bytes = pQ->dataLenInBytes;
++
++ if (DONT_RUN_LESS_THAN_CHECK == *doCheck) {
++ return FAIL_A_IS_GREATER_THAN_B;
++ }
++
++/*Check MSBs
++if A == B, check next MSB
++if A > B, return A_IS_GREATER_THAN_B
++if A < B, return A_IS_LESS_THAN_B (success)
++*/
++ while (*MSB_K == *MSB_Q) {
++ MSB_K++;
++ MSB_Q++;
++
++ buffer_lengths_in_bytes--;
++ if (0 == buffer_lengths_in_bytes) {
++ DPRINTK("%s() Buffers have equal value!!\n",
++ __FUNCTION__);
++ return FAIL_A_IS_EQUAL_TO_B;
++ }
++
++ }
++
++ if (*MSB_K < *MSB_Q) {
++ return SUCCESS_A_IS_LESS_THAN_B;
++ } else {
++ return FAIL_A_IS_GREATER_THAN_B;
++ }
++
++}
++
++/* Name : icp_ocfDrvDsaSign
++ *
++ * Description : This function will map DSA RS Sign from OCF to the LAC API.
++ *
++ * NOTE: From looking at OCF patch to OpenSSL and even the number of input
++ * parameters, OCF expects us to generate the random seed value. This value
++ * is generated and passed to LAC, however the number is discared in the
++ * callback and not returned to the user.
++ */
++static int icp_ocfDrvDsaSign(struct cryptkop *krp)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ CpaCyDsaRSSignOpData *dsaRsSignOpData = NULL;
++ void *callbackTag = NULL;
++ CpaCyRandGenOpData randGenOpData;
++ int primeQSizeInBytes = 0;
++ int doCheck = 0;
++ CpaFlatBuffer randData;
++ CpaBoolean protocolStatus = CPA_FALSE;
++ CpaFlatBuffer *pR = NULL;
++ CpaFlatBuffer *pS = NULL;
++
++ callbackTag = krp;
++
++ BITS_TO_BYTES(primeQSizeInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_PRIME_Q_INDEX].
++ crp_nbits);
++
++ if (DSA_RS_SIGN_PRIMEQ_SIZE_IN_BYTES != primeQSizeInBytes) {
++ APRINTK("%s(): DSA PRIME Q size not equal to the "
++ "FIPS defined 20bytes, = %d\n",
++ __FUNCTION__, primeQSizeInBytes);
++ krp->krp_status = EDOM;
++ return EDOM;
++ }
++
++ dsaRsSignOpData = kmem_cache_zalloc(drvDSARSSign_zone, GFP_KERNEL);
++ if (NULL == dsaRsSignOpData) {
++ APRINTK("%s():Failed to get memory"
++ " for DSA RS Sign Op data struct\n", __FUNCTION__);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ dsaRsSignOpData->K.pData =
++ kmem_cache_alloc(drvDSARSSignKValue_zone, GFP_ATOMIC);
++
++ if (NULL == dsaRsSignOpData->K.pData) {
++ APRINTK("%s():Failed to get memory"
++ " for DSA RS Sign Op Random value\n", __FUNCTION__);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ pR = kmem_cache_zalloc(drvFlatBuffer_zone, GFP_KERNEL);
++ if (NULL == pR) {
++ APRINTK("%s():Failed to get memory"
++ " for DSA signature R\n", __FUNCTION__);
++ kmem_cache_free(drvDSARSSignKValue_zone,
++ dsaRsSignOpData->K.pData);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ pS = kmem_cache_zalloc(drvFlatBuffer_zone, GFP_KERNEL);
++ if (NULL == pS) {
++ APRINTK("%s():Failed to get memory"
++ " for DSA signature S\n", __FUNCTION__);
++ icp_ocfDrvFreeFlatBuffer(pR);
++ kmem_cache_free(drvDSARSSignKValue_zone,
++ dsaRsSignOpData->K.pData);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ /*link prime number parameter for ease of processing */
++ dsaRsSignOpData->P.pData =
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_PRIME_P_INDEX].crp_p;
++ BITS_TO_BYTES(dsaRsSignOpData->P.dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_PRIME_P_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(dsaRsSignOpData->P.pData,
++ dsaRsSignOpData->P.dataLenInBytes);
++
++ dsaRsSignOpData->Q.pData =
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_PRIME_Q_INDEX].crp_p;
++ BITS_TO_BYTES(dsaRsSignOpData->Q.dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_PRIME_Q_INDEX].
++ crp_nbits);
++
++ icp_ocfDrvSwapBytes(dsaRsSignOpData->Q.pData,
++ dsaRsSignOpData->Q.dataLenInBytes);
++
++ /*generate random number with equal buffer size to Prime value Q,
++ but value less than Q */
++ dsaRsSignOpData->K.dataLenInBytes = dsaRsSignOpData->Q.dataLenInBytes;
++
++ randGenOpData.generateBits = CPA_TRUE;
++ randGenOpData.lenInBytes = dsaRsSignOpData->K.dataLenInBytes;
++
++ icp_ocfDrvPtrAndLenToFlatBuffer(dsaRsSignOpData->K.pData,
++ dsaRsSignOpData->K.dataLenInBytes,
++ &randData);
++
++ doCheck = 0;
++ while (icp_ocfDrvCheckALessThanB(&(dsaRsSignOpData->K),
++ &(dsaRsSignOpData->Q), &doCheck)) {
++
++ if (CPA_STATUS_SUCCESS
++ != cpaCyRandGen(CPA_INSTANCE_HANDLE_SINGLE,
++ NULL, NULL, &randGenOpData, &randData)) {
++ APRINTK("%s(): ERROR - Failed to generate DSA RS Sign K"
++ "value\n", __FUNCTION__);
++ icp_ocfDrvFreeFlatBuffer(pS);
++ icp_ocfDrvFreeFlatBuffer(pR);
++ kmem_cache_free(drvDSARSSignKValue_zone,
++ dsaRsSignOpData->K.pData);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ krp->krp_status = EAGAIN;
++ return EAGAIN;
++ }
++
++ doCheck++;
++ if (DSA_SIGN_RAND_GEN_VAL_CHECK_MAX_ITERATIONS == doCheck) {
++ APRINTK("%s(): ERROR - Failed to find DSA RS Sign K "
++ "value less than Q value\n", __FUNCTION__);
++ icp_ocfDrvFreeFlatBuffer(pS);
++ icp_ocfDrvFreeFlatBuffer(pR);
++ kmem_cache_free(drvDSARSSignKValue_zone,
++ dsaRsSignOpData->K.pData);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ krp->krp_status = EAGAIN;
++ return EAGAIN;
++ }
++
++ }
++ /*Rand Data - no need to swap bytes for pK */
++
++ /* Link parameters */
++ dsaRsSignOpData->G.pData =
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_G_INDEX].crp_p;
++ BITS_TO_BYTES(dsaRsSignOpData->G.dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_G_INDEX].crp_nbits);
++
++ icp_ocfDrvSwapBytes(dsaRsSignOpData->G.pData,
++ dsaRsSignOpData->G.dataLenInBytes);
++
++ dsaRsSignOpData->X.pData =
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_X_INDEX].crp_p;
++ BITS_TO_BYTES(dsaRsSignOpData->X.dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_X_INDEX].crp_nbits);
++ icp_ocfDrvSwapBytes(dsaRsSignOpData->X.pData,
++ dsaRsSignOpData->X.dataLenInBytes);
++
++ dsaRsSignOpData->M.pData =
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_DGST_INDEX].crp_p;
++ BITS_TO_BYTES(dsaRsSignOpData->M.dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_DGST_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaRsSignOpData->M.pData,
++ dsaRsSignOpData->M.dataLenInBytes);
++
++ /* Output Parameters */
++ pS->pData = krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_S_RESULT_INDEX].crp_p;
++ BITS_TO_BYTES(pS->dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_S_RESULT_INDEX].
++ crp_nbits);
++
++ pR->pData = krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_R_RESULT_INDEX].crp_p;
++ BITS_TO_BYTES(pR->dataLenInBytes,
++ krp->krp_param[ICP_DSA_SIGN_KRP_PARAM_R_RESULT_INDEX].
++ crp_nbits);
++
++ lacStatus = cpaCyDsaSignRS(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvDsaRSSignCallBack,
++ callbackTag, dsaRsSignOpData,
++ &protocolStatus, pR, pS);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): DSA RS Sign Operation failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ krp->krp_status = ECANCELED;
++ icp_ocfDrvFreeFlatBuffer(pS);
++ icp_ocfDrvFreeFlatBuffer(pR);
++ kmem_cache_free(drvDSARSSignKValue_zone,
++ dsaRsSignOpData->K.pData);
++ kmem_cache_free(drvDSARSSign_zone, dsaRsSignOpData);
++ }
++
++ return lacStatus;
++}
++
++/* Name : icp_ocfDrvDsaVerify
++ *
++ * Description : This function will map DSA RS Verify from OCF to the LAC API.
++ *
++ */
++static int icp_ocfDrvDsaVerify(struct cryptkop *krp)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ CpaCyDsaVerifyOpData *dsaVerifyOpData = NULL;
++ void *callbackTag = NULL;
++ CpaBoolean verifyStatus = CPA_FALSE;
++
++ callbackTag = krp;
++
++ dsaVerifyOpData = kmem_cache_zalloc(drvDSAVerify_zone, GFP_KERNEL);
++ if (NULL == dsaVerifyOpData) {
++ APRINTK("%s():Failed to get memory"
++ " for DSA Verify Op data struct\n", __FUNCTION__);
++ krp->krp_status = ENOMEM;
++ return ENOMEM;
++ }
++
++ /* Link parameters */
++ dsaVerifyOpData->P.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PRIME_P_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->P.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PRIME_P_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->P.pData,
++ dsaVerifyOpData->P.dataLenInBytes);
++
++ dsaVerifyOpData->Q.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PRIME_Q_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->Q.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PRIME_Q_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->Q.pData,
++ dsaVerifyOpData->Q.dataLenInBytes);
++
++ dsaVerifyOpData->G.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_G_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->G.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_G_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->G.pData,
++ dsaVerifyOpData->G.dataLenInBytes);
++
++ dsaVerifyOpData->Y.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PUBKEY_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->Y.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_PUBKEY_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->Y.pData,
++ dsaVerifyOpData->Y.dataLenInBytes);
++
++ dsaVerifyOpData->M.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_DGST_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->M.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_DGST_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->M.pData,
++ dsaVerifyOpData->M.dataLenInBytes);
++
++ dsaVerifyOpData->R.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_SIG_R_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->R.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_SIG_R_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->R.pData,
++ dsaVerifyOpData->R.dataLenInBytes);
++
++ dsaVerifyOpData->S.pData =
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_SIG_S_INDEX].crp_p;
++ BITS_TO_BYTES(dsaVerifyOpData->S.dataLenInBytes,
++ krp->krp_param[ICP_DSA_VERIFY_KRP_PARAM_SIG_S_INDEX].
++ crp_nbits);
++ icp_ocfDrvSwapBytes(dsaVerifyOpData->S.pData,
++ dsaVerifyOpData->S.dataLenInBytes);
++
++ lacStatus = cpaCyDsaVerify(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvDsaVerifyCallBack,
++ callbackTag, dsaVerifyOpData, &verifyStatus);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): DSA Verify Operation failed (%d).\n",
++ __FUNCTION__, lacStatus);
++ kmem_cache_free(drvDSAVerify_zone, dsaVerifyOpData);
++ krp->krp_status = ECANCELED;
++ }
++
++ return lacStatus;
++}
++
++/* Name : icp_ocfDrvReadRandom
++ *
++ * Description : This function will map RNG functionality calls from OCF
++ * to the LAC API.
++ */
++int icp_ocfDrvReadRandom(void *arg, uint32_t * buf, int maxwords)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ CpaCyRandGenOpData randGenOpData;
++ CpaFlatBuffer randData;
++
++ if (NULL == buf) {
++ APRINTK("%s(): Invalid input parameters\n", __FUNCTION__);
++ return EINVAL;
++ }
++
++ /* maxwords here is number of integers to generate data for */
++ randGenOpData.generateBits = CPA_TRUE;
++
++ randGenOpData.lenInBytes = maxwords * sizeof(uint32_t);
++
++ icp_ocfDrvPtrAndLenToFlatBuffer((Cpa8U *) buf,
++ randGenOpData.lenInBytes, &randData);
++
++ lacStatus = cpaCyRandGen(CPA_INSTANCE_HANDLE_SINGLE,
++ NULL, NULL, &randGenOpData, &randData);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): icp_LacSymRandGen failed (%d). \n",
++ __FUNCTION__, lacStatus);
++ return RETURN_RAND_NUM_GEN_FAILED;
++ }
++
++ return randGenOpData.lenInBytes / sizeof(uint32_t);
++}
++
++/* Name : icp_ocfDrvDhP1Callback
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the DH operation.
++ */
++static void
++icp_ocfDrvDhP1CallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaFlatBuffer * pLocalOctetStringPV)
++{
++ struct cryptkop *krp = NULL;
++ CpaCyDhPhase1KeyGenOpData *pPhase1OpData = NULL;
++
++ if (NULL == callbackTag) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "callbackTag data is NULL\n", __FUNCTION__);
++ return;
++ }
++ krp = (struct cryptkop *)callbackTag;
++
++ if (NULL == pOpData) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "Operation Data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++ pPhase1OpData = (CpaCyDhPhase1KeyGenOpData *) pOpData;
++
++ if (NULL == pLocalOctetStringPV) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "pLocalOctetStringPV Data is NULL\n", __FUNCTION__);
++ memset(pPhase1OpData, 0, sizeof(CpaCyDhPhase1KeyGenOpData));
++ kmem_cache_free(drvDH_zone, pPhase1OpData);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++
++ if (CPA_STATUS_SUCCESS == status) {
++ krp->krp_status = CRYPTO_OP_SUCCESS;
++ } else {
++ APRINTK("%s(): Diffie Hellman Phase1 Key Gen failed - "
++ "Operation Status = %d\n", __FUNCTION__, status);
++ krp->krp_status = ECANCELED;
++ }
++
++ icp_ocfDrvSwapBytes(pLocalOctetStringPV->pData,
++ pLocalOctetStringPV->dataLenInBytes);
++
++ icp_ocfDrvFreeFlatBuffer(pLocalOctetStringPV);
++ memset(pPhase1OpData, 0, sizeof(CpaCyDhPhase1KeyGenOpData));
++ kmem_cache_free(drvDH_zone, pPhase1OpData);
++
++ crypto_kdone(krp);
++
++ return;
++}
++
++/* Name : icp_ocfDrvModExpCallBack
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the Mod Exp operation.
++ */
++static void
++icp_ocfDrvModExpCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpdata, CpaFlatBuffer * pResult)
++{
++ struct cryptkop *krp = NULL;
++ CpaCyLnModExpOpData *pLnModExpOpData = NULL;
++
++ if (NULL == callbackTag) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "callbackTag data is NULL\n", __FUNCTION__);
++ return;
++ }
++ krp = (struct cryptkop *)callbackTag;
++
++ if (NULL == pOpdata) {
++ DPRINTK("%s(): Invalid Mod Exp input parameters - "
++ "Operation Data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++ pLnModExpOpData = (CpaCyLnModExpOpData *) pOpdata;
++
++ if (NULL == pResult) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "pResult data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ memset(pLnModExpOpData, 0, sizeof(CpaCyLnModExpOpData));
++ kmem_cache_free(drvLnModExp_zone, pLnModExpOpData);
++ crypto_kdone(krp);
++ return;
++ }
++
++ if (CPA_STATUS_SUCCESS == status) {
++ krp->krp_status = CRYPTO_OP_SUCCESS;
++ } else {
++ APRINTK("%s(): LAC Mod Exp Operation failed - "
++ "Operation Status = %d\n", __FUNCTION__, status);
++ krp->krp_status = ECANCELED;
++ }
++
++ icp_ocfDrvSwapBytes(pResult->pData, pResult->dataLenInBytes);
++
++ /*switch base size value back to original */
++ if (pLnModExpOpData->base.pData ==
++ (uint8_t *) & (krp->
++ krp_param[ICP_MOD_EXP_KRP_PARAM_BASE_INDEX].
++ crp_nbits)) {
++ *((uint32_t *) pLnModExpOpData->base.pData) =
++ ntohl(*((uint32_t *) pLnModExpOpData->base.pData));
++ }
++ icp_ocfDrvFreeFlatBuffer(pResult);
++ memset(pLnModExpOpData, 0, sizeof(CpaCyLnModExpOpData));
++ kmem_cache_free(drvLnModExp_zone, pLnModExpOpData);
++
++ crypto_kdone(krp);
++
++ return;
++
++}
++
++/* Name : icp_ocfDrvModExpCRTCallBack
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the Mod Exp CRT operation.
++ */
++static void
++icp_ocfDrvModExpCRTCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaFlatBuffer * pOutputData)
++{
++ struct cryptkop *krp = NULL;
++ CpaCyRsaDecryptOpData *pDecryptData = NULL;
++
++ if (NULL == callbackTag) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "callbackTag data is NULL\n", __FUNCTION__);
++ return;
++ }
++
++ krp = (struct cryptkop *)callbackTag;
++
++ if (NULL == pOpData) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "Operation Data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++ pDecryptData = (CpaCyRsaDecryptOpData *) pOpData;
++
++ if (NULL == pOutputData) {
++ DPRINTK("%s(): Invalid input parameter - "
++ "pOutputData is NULL\n", __FUNCTION__);
++ memset(pDecryptData->pRecipientPrivateKey, 0,
++ sizeof(CpaCyRsaPrivateKey));
++ kmem_cache_free(drvRSAPrivateKey_zone,
++ pDecryptData->pRecipientPrivateKey);
++ memset(pDecryptData, 0, sizeof(CpaCyRsaDecryptOpData));
++ kmem_cache_free(drvRSADecrypt_zone, pDecryptData);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++
++ if (CPA_STATUS_SUCCESS == status) {
++ krp->krp_status = CRYPTO_OP_SUCCESS;
++ } else {
++ APRINTK("%s(): LAC Mod Exp CRT operation failed - "
++ "Operation Status = %d\n", __FUNCTION__, status);
++ krp->krp_status = ECANCELED;
++ }
++
++ icp_ocfDrvSwapBytes(pOutputData->pData, pOutputData->dataLenInBytes);
++
++ icp_ocfDrvFreeFlatBuffer(pOutputData);
++ memset(pDecryptData->pRecipientPrivateKey, 0,
++ sizeof(CpaCyRsaPrivateKey));
++ kmem_cache_free(drvRSAPrivateKey_zone,
++ pDecryptData->pRecipientPrivateKey);
++ memset(pDecryptData, 0, sizeof(CpaCyRsaDecryptOpData));
++ kmem_cache_free(drvRSADecrypt_zone, pDecryptData);
++
++ crypto_kdone(krp);
++
++ return;
++}
++
++/* Name : icp_ocfDrvDsaRSSignCallBack
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the DSA RS sign operation.
++ */
++static void
++icp_ocfDrvDsaRSSignCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData,
++ CpaBoolean protocolStatus,
++ CpaFlatBuffer * pR, CpaFlatBuffer * pS)
++{
++ struct cryptkop *krp = NULL;
++ CpaCyDsaRSSignOpData *pSignData = NULL;
++
++ if (NULL == callbackTag) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "callbackTag data is NULL\n", __FUNCTION__);
++ return;
++ }
++
++ krp = (struct cryptkop *)callbackTag;
++
++ if (NULL == pOpData) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "Operation Data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++ pSignData = (CpaCyDsaRSSignOpData *) pOpData;
++
++ if (NULL == pR) {
++ DPRINTK("%s(): Invalid input parameter - "
++ "pR sign is NULL\n", __FUNCTION__);
++ icp_ocfDrvFreeFlatBuffer(pS);
++ kmem_cache_free(drvDSARSSign_zone, pSignData);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++
++ if (NULL == pS) {
++ DPRINTK("%s(): Invalid input parameter - "
++ "pS sign is NULL\n", __FUNCTION__);
++ icp_ocfDrvFreeFlatBuffer(pR);
++ kmem_cache_free(drvDSARSSign_zone, pSignData);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++
++ if (CPA_STATUS_SUCCESS != status) {
++ APRINTK("%s(): LAC DSA RS Sign operation failed - "
++ "Operation Status = %d\n", __FUNCTION__, status);
++ krp->krp_status = ECANCELED;
++ } else {
++ krp->krp_status = CRYPTO_OP_SUCCESS;
++
++ if (CPA_TRUE != protocolStatus) {
++ DPRINTK("%s(): LAC DSA RS Sign operation failed due "
++ "to protocol error\n", __FUNCTION__);
++ krp->krp_status = EIO;
++ }
++ }
++
++ /* Swap bytes only when the callback status is successful and
++ protocolStatus is set to true */
++ if (CPA_STATUS_SUCCESS == status && CPA_TRUE == protocolStatus) {
++ icp_ocfDrvSwapBytes(pR->pData, pR->dataLenInBytes);
++ icp_ocfDrvSwapBytes(pS->pData, pS->dataLenInBytes);
++ }
++
++ icp_ocfDrvFreeFlatBuffer(pR);
++ icp_ocfDrvFreeFlatBuffer(pS);
++ memset(pSignData->K.pData, 0, pSignData->K.dataLenInBytes);
++ kmem_cache_free(drvDSARSSignKValue_zone, pSignData->K.pData);
++ memset(pSignData, 0, sizeof(CpaCyDsaRSSignOpData));
++ kmem_cache_free(drvDSARSSign_zone, pSignData);
++ crypto_kdone(krp);
++
++ return;
++}
++
++/* Name : icp_ocfDrvDsaVerifyCallback
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the DSA Verify operation.
++ */
++static void
++icp_ocfDrvDsaVerifyCallBack(void *callbackTag,
++ CpaStatus status,
++ void *pOpData, CpaBoolean verifyStatus)
++{
++
++ struct cryptkop *krp = NULL;
++ CpaCyDsaVerifyOpData *pVerData = NULL;
++
++ if (NULL == callbackTag) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "callbackTag data is NULL\n", __FUNCTION__);
++ return;
++ }
++
++ krp = (struct cryptkop *)callbackTag;
++
++ if (NULL == pOpData) {
++ DPRINTK("%s(): Invalid input parameters - "
++ "Operation Data is NULL\n", __FUNCTION__);
++ krp->krp_status = ECANCELED;
++ crypto_kdone(krp);
++ return;
++ }
++ pVerData = (CpaCyDsaVerifyOpData *) pOpData;
++
++ if (CPA_STATUS_SUCCESS != status) {
++ APRINTK("%s(): LAC DSA Verify operation failed - "
++ "Operation Status = %d\n", __FUNCTION__, status);
++ krp->krp_status = ECANCELED;
++ } else {
++ krp->krp_status = CRYPTO_OP_SUCCESS;
++
++ if (CPA_TRUE != verifyStatus) {
++ DPRINTK("%s(): DSA signature invalid\n", __FUNCTION__);
++ krp->krp_status = EIO;
++ }
++ }
++
++ /* Swap bytes only when the callback status is successful and
++ verifyStatus is set to true */
++ /*Just swapping back the key values for now. Possibly all
++ swapped buffers need to be reverted */
++ if (CPA_STATUS_SUCCESS == status && CPA_TRUE == verifyStatus) {
++ icp_ocfDrvSwapBytes(pVerData->R.pData,
++ pVerData->R.dataLenInBytes);
++ icp_ocfDrvSwapBytes(pVerData->S.pData,
++ pVerData->S.dataLenInBytes);
++ }
++
++ memset(pVerData, 0, sizeof(CpaCyDsaVerifyOpData));
++ kmem_cache_free(drvDSAVerify_zone, pVerData);
++ crypto_kdone(krp);
++
++ return;
++}
+diff -Nur linux-2.6.30.orig/crypto/ocf/ep80579/icp_common.c linux-2.6.30/crypto/ocf/ep80579/icp_common.c
+--- linux-2.6.30.orig/crypto/ocf/ep80579/icp_common.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ep80579/icp_common.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,891 @@
++/***************************************************************************
++ *
++ * This file is provided under a dual BSD/GPLv2 license. When using or
++ * redistributing this file, you may do so under either license.
++ *
++ * GPL LICENSE SUMMARY
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of version 2 of the GNU General Public License as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
++ * The full GNU General Public License is included in this distribution
++ * in the file called LICENSE.GPL.
++ *
++ * Contact Information:
++ * Intel Corporation
++ *
++ * BSD LICENSE
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * * Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * * Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in
++ * the documentation and/or other materials provided with the
++ * distribution.
++ * * Neither the name of Intel Corporation nor the names of its
++ * contributors may be used to endorse or promote products derived
++ * from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
++ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
++ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
++ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
++ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
++ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ *
++ * version: Security.L.1.0.130
++ *
++ ***************************************************************************/
++
++/*
++ * An OCF module that uses Intel® QuickAssist Integrated Accelerator to do the
++ * crypto.
++ *
++ * This driver requires the ICP Access Library that is available from Intel in
++ * order to operate.
++ */
++
++#include "icp_ocf.h"
++
++#define ICP_OCF_COMP_NAME "ICP_OCF"
++#define ICP_OCF_VER_MAIN (2)
++#define ICP_OCF_VER_MJR (0)
++#define ICP_OCF_VER_MNR (0)
++
++#define MAX_DEREG_RETRIES (100)
++#define DEFAULT_DEREG_RETRIES (10)
++#define DEFAULT_DEREG_DELAY_IN_JIFFIES (10)
++
++/* This defines the maximum number of sessions possible between OCF
++ and the OCF Tolapai Driver. If set to zero, there is no limit. */
++#define DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT (0)
++#define NUM_SUPPORTED_CAPABILITIES (21)
++
++/*Slabs zones*/
++struct kmem_cache *drvSessionData_zone = NULL;
++struct kmem_cache *drvOpData_zone = NULL;
++struct kmem_cache *drvDH_zone = NULL;
++struct kmem_cache *drvLnModExp_zone = NULL;
++struct kmem_cache *drvRSADecrypt_zone = NULL;
++struct kmem_cache *drvRSAPrivateKey_zone = NULL;
++struct kmem_cache *drvDSARSSign_zone = NULL;
++struct kmem_cache *drvDSARSSignKValue_zone = NULL;
++struct kmem_cache *drvDSAVerify_zone = NULL;
++
++/*Slab zones for flatbuffers and bufferlist*/
++struct kmem_cache *drvFlatBuffer_zone = NULL;
++
++static int icp_ocfDrvInit(void);
++static void icp_ocfDrvExit(void);
++static void icp_ocfDrvFreeCaches(void);
++static void icp_ocfDrvDeferedFreeLacSessionProcess(void *arg);
++
++int32_t icp_ocfDrvDriverId = INVALID_DRIVER_ID;
++
++/* Module parameter - gives the number of times LAC deregistration shall be
++ re-tried */
++int num_dereg_retries = DEFAULT_DEREG_RETRIES;
++
++/* Module parameter - gives the delay time in jiffies before a LAC session
++ shall be attempted to be deregistered again */
++int dereg_retry_delay_in_jiffies = DEFAULT_DEREG_DELAY_IN_JIFFIES;
++
++/* Module parameter - gives the maximum number of sessions possible between
++ OCF and the OCF Tolapai Driver. If set to zero, there is no limit.*/
++int max_sessions = DEFAULT_OCF_TO_DRV_MAX_SESSION_COUNT;
++
++/* This is set when the module is removed from the system, no further
++ processing can take place if this is set */
++atomic_t icp_ocfDrvIsExiting = ATOMIC_INIT(0);
++
++/* This is used to show how many lac sessions were not deregistered*/
++atomic_t lac_session_failed_dereg_count = ATOMIC_INIT(0);
++
++/* This is used to track the number of registered sessions between OCF and
++ * and the OCF Tolapai driver, when max_session is set to value other than
++ * zero. This ensures that the max_session set for the OCF and the driver
++ * is equal to the LAC registered sessions */
++atomic_t num_ocf_to_drv_registered_sessions = ATOMIC_INIT(0);
++
++/* Head of linked list used to store session data */
++struct list_head icp_ocfDrvGlobalSymListHead;
++struct list_head icp_ocfDrvGlobalSymListHead_FreeMemList;
++
++spinlock_t icp_ocfDrvSymSessInfoListSpinlock = SPIN_LOCK_UNLOCKED;
++rwlock_t icp_kmem_cache_destroy_alloc_lock = RW_LOCK_UNLOCKED;
++
++struct workqueue_struct *icp_ocfDrvFreeLacSessionWorkQ;
++
++struct icp_drvBuffListInfo defBuffListInfo;
++
++static struct {
++ softc_device_decl sc_dev;
++} icpDev;
++
++static device_method_t icp_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, icp_ocfDrvNewSession),
++ DEVMETHOD(cryptodev_freesession, icp_ocfDrvFreeLACSession),
++ DEVMETHOD(cryptodev_process, icp_ocfDrvSymProcess),
++ DEVMETHOD(cryptodev_kprocess, icp_ocfDrvPkeProcess),
++};
++
++module_param(num_dereg_retries, int, S_IRUGO);
++module_param(dereg_retry_delay_in_jiffies, int, S_IRUGO);
++module_param(max_sessions, int, S_IRUGO);
++
++MODULE_PARM_DESC(num_dereg_retries,
++ "Number of times to retry LAC Sym Session Deregistration. "
++ "Default 10, Max 100");
++MODULE_PARM_DESC(dereg_retry_delay_in_jiffies, "Delay in jiffies "
++ "(added to a schedule() function call) before a LAC Sym "
++ "Session Dereg is retried. Default 10");
++MODULE_PARM_DESC(max_sessions, "This sets the maximum number of sessions "
++ "between OCF and this driver. If this value is set to zero, "
++ "max session count checking is disabled. Default is zero(0)");
++
++/* Name : icp_ocfDrvInit
++ *
++ * Description : This function will register all the symmetric and asymmetric
++ * functionality that will be accelerated by the hardware. It will also
++ * get a unique driver ID from the OCF and initialise all slab caches
++ */
++static int __init icp_ocfDrvInit(void)
++{
++ int ocfStatus = 0;
++
++ IPRINTK("=== %s ver %d.%d.%d ===\n", ICP_OCF_COMP_NAME,
++ ICP_OCF_VER_MAIN, ICP_OCF_VER_MJR, ICP_OCF_VER_MNR);
++
++ if (MAX_DEREG_RETRIES < num_dereg_retries) {
++ EPRINTK("Session deregistration retry count set to greater "
++ "than %d", MAX_DEREG_RETRIES);
++ return -1;
++ }
++
++ /* Initialize and Start the Cryptographic component */
++ if (CPA_STATUS_SUCCESS !=
++ cpaCyStartInstance(CPA_INSTANCE_HANDLE_SINGLE)) {
++ EPRINTK("Failed to initialize and start the instance "
++ "of the Cryptographic component.\n");
++ return -1;
++ }
++
++ /* Set the default size of BufferList to allocate */
++ memset(&defBuffListInfo, 0, sizeof(struct icp_drvBuffListInfo));
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvBufferListMemInfo(ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS,
++ &defBuffListInfo)) {
++ EPRINTK("Failed to get bufferlist memory info.\n");
++ return -1;
++ }
++
++ /*Register OCF Tolapai Driver with OCF */
++ memset(&icpDev, 0, sizeof(icpDev));
++ softc_device_init(&icpDev, "icp", 0, icp_methods);
++
++ icp_ocfDrvDriverId = crypto_get_driverid(softc_get_device(&icpDev),
++ CRYPTOCAP_F_HARDWARE);
++
++ if (icp_ocfDrvDriverId < 0) {
++ EPRINTK("%s : ICP driver failed to register with OCF!\n",
++ __FUNCTION__);
++ return -ENODEV;
++ }
++
++ /*Create all the slab caches used by the OCF Tolapai Driver */
++ drvSessionData_zone =
++ ICP_CACHE_CREATE("ICP Session Data", struct icp_drvSessionData);
++ ICP_CACHE_NULL_CHECK(drvSessionData_zone);
++
++ /*
++ * Allocation of the OpData includes the allocation space for meta data.
++ * The memory after the opData structure is reserved for this meta data.
++ */
++ drvOpData_zone =
++ kmem_cache_create("ICP Op Data", sizeof(struct icp_drvOpData) +
++ defBuffListInfo.metaSize ,0, SLAB_HWCACHE_ALIGN, NULL, NULL);
++
++
++ ICP_CACHE_NULL_CHECK(drvOpData_zone);
++
++ drvDH_zone = ICP_CACHE_CREATE("ICP DH data", CpaCyDhPhase1KeyGenOpData);
++ ICP_CACHE_NULL_CHECK(drvDH_zone);
++
++ drvLnModExp_zone =
++ ICP_CACHE_CREATE("ICP ModExp data", CpaCyLnModExpOpData);
++ ICP_CACHE_NULL_CHECK(drvLnModExp_zone);
++
++ drvRSADecrypt_zone =
++ ICP_CACHE_CREATE("ICP RSA decrypt data", CpaCyRsaDecryptOpData);
++ ICP_CACHE_NULL_CHECK(drvRSADecrypt_zone);
++
++ drvRSAPrivateKey_zone =
++ ICP_CACHE_CREATE("ICP RSA private key data", CpaCyRsaPrivateKey);
++ ICP_CACHE_NULL_CHECK(drvRSAPrivateKey_zone);
++
++ drvDSARSSign_zone =
++ ICP_CACHE_CREATE("ICP DSA Sign", CpaCyDsaRSSignOpData);
++ ICP_CACHE_NULL_CHECK(drvDSARSSign_zone);
++
++ /*too awkward to use a macro here */
++ drvDSARSSignKValue_zone =
++ kmem_cache_create("ICP DSA Sign Rand Val",
++ DSA_RS_SIGN_PRIMEQ_SIZE_IN_BYTES, 0,
++ SLAB_HWCACHE_ALIGN, NULL, NULL);
++ ICP_CACHE_NULL_CHECK(drvDSARSSignKValue_zone);
++
++ drvDSAVerify_zone =
++ ICP_CACHE_CREATE("ICP DSA Verify", CpaCyDsaVerifyOpData);
++ ICP_CACHE_NULL_CHECK(drvDSAVerify_zone);
++
++ drvFlatBuffer_zone =
++ ICP_CACHE_CREATE("ICP Flat Buffers", CpaFlatBuffer);
++ ICP_CACHE_NULL_CHECK(drvFlatBuffer_zone);
++
++ /* Register the ICP symmetric crypto support. */
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_NULL_CBC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_DES_CBC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_3DES_CBC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_AES_CBC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_ARC4);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_MD5);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_MD5_HMAC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA1);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA1_HMAC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_256);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_256_HMAC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_384);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_384_HMAC);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_512);
++ ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(CRYPTO_SHA2_512_HMAC);
++
++ /* Register the ICP asymmetric algorithm support */
++ ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(CRK_DH_COMPUTE_KEY);
++ ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(CRK_MOD_EXP);
++ ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(CRK_MOD_EXP_CRT);
++ ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(CRK_DSA_SIGN);
++ ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(CRK_DSA_VERIFY);
++
++ /* Register the ICP random number generator support */
++ if (OCF_REGISTRATION_STATUS_SUCCESS ==
++ crypto_rregister(icp_ocfDrvDriverId, icp_ocfDrvReadRandom, NULL)) {
++ ocfStatus++;
++ }
++
++ if (OCF_ZERO_FUNCTIONALITY_REGISTERED == ocfStatus) {
++ DPRINTK("%s: Failed to register any device capabilities\n",
++ __FUNCTION__);
++ icp_ocfDrvFreeCaches();
++ icp_ocfDrvDriverId = INVALID_DRIVER_ID;
++ return -ECANCELED;
++ }
++
++ DPRINTK("%s: Registered %d of %d device capabilities\n",
++ __FUNCTION__, ocfStatus, NUM_SUPPORTED_CAPABILITIES);
++
++/*Session data linked list used during module exit*/
++ INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead);
++ INIT_LIST_HEAD(&icp_ocfDrvGlobalSymListHead_FreeMemList);
++
++ icp_ocfDrvFreeLacSessionWorkQ =
++ create_singlethread_workqueue("ocfLacDeregWorkQueue");
++
++ return 0;
++}
++
++/* Name : icp_ocfDrvExit
++ *
++ * Description : This function will deregister all the symmetric sessions
++ * registered with the LAC component. It will also deregister all symmetric
++ * and asymmetric functionality that can be accelerated by the hardware via OCF
++ * and random number generation if it is enabled.
++ */
++static void icp_ocfDrvExit(void)
++{
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ struct icp_drvSessionData *sessionData = NULL;
++ struct icp_drvSessionData *tempSessionData = NULL;
++ int i, remaining_delay_time_in_jiffies = 0;
++ /* There is a possibility of a process or new session command being */
++ /* sent before this variable is incremented. The aim of this variable */
++ /* is to stop a loop of calls creating a deadlock situation which */
++ /* would prevent the driver from exiting. */
++
++ atomic_inc(&icp_ocfDrvIsExiting);
++
++ /*Existing sessions will be routed to another driver after these calls */
++ crypto_unregister_all(icp_ocfDrvDriverId);
++ crypto_runregister_all(icp_ocfDrvDriverId);
++
++ /*If any sessions are waiting to be deregistered, do that. This also
++ flushes the work queue */
++ destroy_workqueue(icp_ocfDrvFreeLacSessionWorkQ);
++
++ /*ENTER CRITICAL SECTION */
++ spin_lock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++ list_for_each_entry_safe(tempSessionData, sessionData,
++ &icp_ocfDrvGlobalSymListHead, listNode) {
++ for (i = 0; i < num_dereg_retries; i++) {
++ /*No harm if bad input - LAC will handle error cases */
++ if (ICP_SESSION_RUNNING == tempSessionData->inUse) {
++ lacStatus =
++ cpaCySymRemoveSession
++ (CPA_INSTANCE_HANDLE_SINGLE,
++ tempSessionData->sessHandle);
++ if (CPA_STATUS_SUCCESS == lacStatus) {
++ /* Succesfully deregistered */
++ break;
++ } else if (CPA_STATUS_RETRY != lacStatus) {
++ atomic_inc
++ (&lac_session_failed_dereg_count);
++ break;
++ }
++
++ /*schedule_timout returns the time left for completion if
++ * this task is set to TASK_INTERRUPTIBLE */
++ remaining_delay_time_in_jiffies =
++ dereg_retry_delay_in_jiffies;
++ while (0 > remaining_delay_time_in_jiffies) {
++ remaining_delay_time_in_jiffies =
++ schedule_timeout
++ (remaining_delay_time_in_jiffies);
++ }
++
++ DPRINTK
++ ("%s(): Retry %d to deregistrate the session\n",
++ __FUNCTION__, i);
++ }
++ }
++
++ /*remove from current list */
++ list_del(&(tempSessionData->listNode));
++ /*add to free mem linked list */
++ list_add(&(tempSessionData->listNode),
++ &icp_ocfDrvGlobalSymListHead_FreeMemList);
++
++ }
++
++ /*EXIT CRITICAL SECTION */
++ spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++
++ /*set back to initial values */
++ sessionData = NULL;
++ /*still have a reference in our list! */
++ tempSessionData = NULL;
++ /*free memory */
++ list_for_each_entry_safe(tempSessionData, sessionData,
++ &icp_ocfDrvGlobalSymListHead_FreeMemList,
++ listNode) {
++
++ list_del(&(tempSessionData->listNode));
++ /* Free allocated CpaCySymSessionCtx */
++ if (NULL != tempSessionData->sessHandle) {
++ kfree(tempSessionData->sessHandle);
++ }
++ memset(tempSessionData, 0, sizeof(struct icp_drvSessionData));
++ kmem_cache_free(drvSessionData_zone, tempSessionData);
++ }
++
++ if (0 != atomic_read(&lac_session_failed_dereg_count)) {
++ DPRINTK("%s(): %d LAC sessions were not deregistered "
++ "correctly. This is not a clean exit! \n",
++ __FUNCTION__,
++ atomic_read(&lac_session_failed_dereg_count));
++ }
++
++ icp_ocfDrvFreeCaches();
++ icp_ocfDrvDriverId = INVALID_DRIVER_ID;
++
++ /* Shutdown the Cryptographic component */
++ lacStatus = cpaCyStopInstance(CPA_INSTANCE_HANDLE_SINGLE);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ DPRINTK("%s(): Failed to stop instance of the "
++ "Cryptographic component.(status == %d)\n",
++ __FUNCTION__, lacStatus);
++ }
++
++}
++
++/* Name : icp_ocfDrvFreeCaches
++ *
++ * Description : This function deregisters all slab caches
++ */
++static void icp_ocfDrvFreeCaches(void)
++{
++ if (atomic_read(&icp_ocfDrvIsExiting) != CPA_TRUE) {
++ atomic_set(&icp_ocfDrvIsExiting, 1);
++ }
++
++ /*Sym Zones */
++ ICP_CACHE_DESTROY(drvSessionData_zone);
++ ICP_CACHE_DESTROY(drvOpData_zone);
++
++ /*Asym zones */
++ ICP_CACHE_DESTROY(drvDH_zone);
++ ICP_CACHE_DESTROY(drvLnModExp_zone);
++ ICP_CACHE_DESTROY(drvRSADecrypt_zone);
++ ICP_CACHE_DESTROY(drvRSAPrivateKey_zone);
++ ICP_CACHE_DESTROY(drvDSARSSignKValue_zone);
++ ICP_CACHE_DESTROY(drvDSARSSign_zone);
++ ICP_CACHE_DESTROY(drvDSAVerify_zone);
++
++ /*FlatBuffer and BufferList Zones */
++ ICP_CACHE_DESTROY(drvFlatBuffer_zone);
++
++}
++
++/* Name : icp_ocfDrvDeregRetry
++ *
++ * Description : This function will try to farm the session deregistration
++ * off to a work queue. If it fails, nothing more can be done and it
++ * returns an error
++ */
++
++int icp_ocfDrvDeregRetry(CpaCySymSessionCtx sessionToDeregister)
++{
++ struct icp_ocfDrvFreeLacSession *workstore = NULL;
++
++ DPRINTK("%s(): Retry - Deregistering session (%p)\n",
++ __FUNCTION__, sessionToDeregister);
++
++ /*make sure the session is not available to be allocated during this
++ process */
++ atomic_inc(&lac_session_failed_dereg_count);
++
++ /*Farm off to work queue */
++ workstore =
++ kmalloc(sizeof(struct icp_ocfDrvFreeLacSession), GFP_ATOMIC);
++ if (NULL == workstore) {
++ DPRINTK("%s(): unable to free session - no memory available "
++ "for work queue\n", __FUNCTION__);
++ return ENOMEM;
++ }
++
++ workstore->sessionToDeregister = sessionToDeregister;
++
++ INIT_WORK(&(workstore->work), icp_ocfDrvDeferedFreeLacSessionProcess,
++ workstore);
++ queue_work(icp_ocfDrvFreeLacSessionWorkQ, &(workstore->work));
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++
++}
++
++/* Name : icp_ocfDrvDeferedFreeLacSessionProcess
++ *
++ * Description : This function will retry (module input parameter)
++ * 'num_dereg_retries' times to deregister any symmetric session that recieves a
++ * CPA_STATUS_RETRY message from the LAC component. This function is run in
++ * Thread context because it is called from a worker thread
++ */
++static void icp_ocfDrvDeferedFreeLacSessionProcess(void *arg)
++{
++ struct icp_ocfDrvFreeLacSession *workstore = NULL;
++ CpaCySymSessionCtx sessionToDeregister = NULL;
++ int i = 0;
++ int remaining_delay_time_in_jiffies = 0;
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++
++ workstore = (struct icp_ocfDrvFreeLacSession *)arg;
++ if (NULL == workstore) {
++ DPRINTK("%s() function called with null parameter \n",
++ __FUNCTION__);
++ return;
++ }
++
++ sessionToDeregister = workstore->sessionToDeregister;
++ kfree(workstore);
++
++ /*if exiting, give deregistration one more blast only */
++ if (atomic_read(&icp_ocfDrvIsExiting) == CPA_TRUE) {
++ lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE,
++ sessionToDeregister);
++
++ if (lacStatus != CPA_STATUS_SUCCESS) {
++ DPRINTK("%s() Failed to Dereg LAC session %p "
++ "during module exit\n", __FUNCTION__,
++ sessionToDeregister);
++ return;
++ }
++
++ atomic_dec(&lac_session_failed_dereg_count);
++ return;
++ }
++
++ for (i = 0; i <= num_dereg_retries; i++) {
++ lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE,
++ sessionToDeregister);
++
++ if (lacStatus == CPA_STATUS_SUCCESS) {
++ atomic_dec(&lac_session_failed_dereg_count);
++ return;
++ }
++ if (lacStatus != CPA_STATUS_RETRY) {
++ DPRINTK("%s() Failed to deregister session - lacStatus "
++ " = %d", __FUNCTION__, lacStatus);
++ break;
++ }
++
++ /*schedule_timout returns the time left for completion if this
++ task is set to TASK_INTERRUPTIBLE */
++ remaining_delay_time_in_jiffies = dereg_retry_delay_in_jiffies;
++ while (0 > remaining_delay_time_in_jiffies) {
++ remaining_delay_time_in_jiffies =
++ schedule_timeout(remaining_delay_time_in_jiffies);
++ }
++
++ }
++
++ DPRINTK("%s(): Unable to deregister session\n", __FUNCTION__);
++ DPRINTK("%s(): Number of unavailable LAC sessions = %d\n", __FUNCTION__,
++ atomic_read(&lac_session_failed_dereg_count));
++}
++
++/* Name : icp_ocfDrvPtrAndLenToFlatBuffer
++ *
++ * Description : This function converts a "pointer and length" buffer
++ * structure to Fredericksburg Flat Buffer (CpaFlatBuffer) format.
++ *
++ * This function assumes that the data passed in are valid.
++ */
++inline void
++icp_ocfDrvPtrAndLenToFlatBuffer(void *pData, uint32_t len,
++ CpaFlatBuffer * pFlatBuffer)
++{
++ pFlatBuffer->pData = pData;
++ pFlatBuffer->dataLenInBytes = len;
++}
++
++/* Name : icp_ocfDrvSingleSkBuffToFlatBuffer
++ *
++ * Description : This function converts a single socket buffer (sk_buff)
++ * structure to a Fredericksburg Flat Buffer (CpaFlatBuffer) format.
++ *
++ * This function assumes that the data passed in are valid.
++ */
++static inline void
++icp_ocfDrvSingleSkBuffToFlatBuffer(struct sk_buff *pSkb,
++ CpaFlatBuffer * pFlatBuffer)
++{
++ pFlatBuffer->pData = pSkb->data;
++ pFlatBuffer->dataLenInBytes = skb_headlen(pSkb);
++}
++
++/* Name : icp_ocfDrvSkBuffToBufferList
++ *
++ * Description : This function converts a socket buffer (sk_buff) structure to
++ * Fredericksburg Scatter/Gather (CpaBufferList) buffer format.
++ *
++ * This function assumes that the bufferlist has been allocated with the correct
++ * number of buffer arrays.
++ *
++ */
++inline int
++icp_ocfDrvSkBuffToBufferList(struct sk_buff *pSkb, CpaBufferList * bufferList)
++{
++ CpaFlatBuffer *curFlatBuffer = NULL;
++ char *skbuffPageAddr = NULL;
++ struct sk_buff *pCurFrag = NULL;
++ struct skb_shared_info *pShInfo = NULL;
++ uint32_t page_offset = 0, i = 0;
++
++ DPRINTK("%s(): Entry Point\n", __FUNCTION__);
++
++ /*
++ * In all cases, the first skb needs to be translated to FlatBuffer.
++ * Perform a buffer translation for the first skbuff
++ */
++ curFlatBuffer = bufferList->pBuffers;
++ icp_ocfDrvSingleSkBuffToFlatBuffer(pSkb, curFlatBuffer);
++
++ /* Set the userData to point to the original sk_buff */
++ bufferList->pUserData = (void *)pSkb;
++
++ /* We now know we'll have at least one element in the SGL */
++ bufferList->numBuffers = 1;
++
++ if (0 == skb_is_nonlinear(pSkb)) {
++ /* Is a linear buffer - therefore it's a single skbuff */
++ DPRINTK("%s(): Exit Point\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++ }
++
++ curFlatBuffer++;
++ pShInfo = skb_shinfo(pSkb);
++ if (pShInfo->frag_list != NULL && pShInfo->nr_frags != 0) {
++ EPRINTK("%s():"
++ "Translation for a combination of frag_list "
++ "and frags[] array not supported!\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ } else if (pShInfo->frag_list != NULL) {
++ /*
++ * Non linear skbuff supported through frag_list
++ * Perform translation for each fragment (sk_buff)
++ * in the frag_list of the first sk_buff.
++ */
++ for (pCurFrag = pShInfo->frag_list;
++ pCurFrag != NULL; pCurFrag = pCurFrag->next) {
++ icp_ocfDrvSingleSkBuffToFlatBuffer(pCurFrag,
++ curFlatBuffer);
++ curFlatBuffer++;
++ bufferList->numBuffers++;
++ }
++ } else if (pShInfo->nr_frags != 0) {
++ /*
++ * Perform translation for each fragment in frags array
++ * and add to the BufferList
++ */
++ for (i = 0; i < pShInfo->nr_frags; i++) {
++ /* Get the page address and offset of this frag */
++ skbuffPageAddr = (char *)pShInfo->frags[i].page;
++ page_offset = pShInfo->frags[i].page_offset;
++
++ /* Convert a pointer and length to a flat buffer */
++ icp_ocfDrvPtrAndLenToFlatBuffer(skbuffPageAddr +
++ page_offset,
++ pShInfo->frags[i].size,
++ curFlatBuffer);
++ curFlatBuffer++;
++ bufferList->numBuffers++;
++ }
++ } else {
++ EPRINTK("%s():" "Could not recognize skbuff fragments!\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ DPRINTK("%s(): Exit Point\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvBufferListToSkBuff
++ *
++ * Description : This function converts a Fredericksburg Scatter/Gather
++ * (CpaBufferList) buffer format to socket buffer structure.
++ */
++inline int
++icp_ocfDrvBufferListToSkBuff(CpaBufferList * bufferList, struct sk_buff **skb)
++{
++ DPRINTK("%s(): Entry Point\n", __FUNCTION__);
++
++ /* Retrieve the orignal skbuff */
++ *skb = (struct sk_buff *)bufferList->pUserData;
++ if (NULL == *skb) {
++ EPRINTK("%s():"
++ "Error on converting from a BufferList. "
++ "The BufferList does not contain an sk_buff.\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++ DPRINTK("%s(): Exit Point\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvPtrAndLenToBufferList
++ *
++ * Description : This function converts a "pointer and length" buffer
++ * structure to Fredericksburg Scatter/Gather Buffer (CpaBufferList) format.
++ *
++ * This function assumes that the data passed in are valid.
++ */
++inline void
++icp_ocfDrvPtrAndLenToBufferList(void *pDataIn, uint32_t length,
++ CpaBufferList * pBufferList)
++{
++ pBufferList->numBuffers = 1;
++ pBufferList->pBuffers->pData = pDataIn;
++ pBufferList->pBuffers->dataLenInBytes = length;
++}
++
++/* Name : icp_ocfDrvBufferListToPtrAndLen
++ *
++ * Description : This function converts Fredericksburg Scatter/Gather Buffer
++ * (CpaBufferList) format to a "pointer and length" buffer structure.
++ *
++ * This function assumes that the data passed in are valid.
++ */
++inline void
++icp_ocfDrvBufferListToPtrAndLen(CpaBufferList * pBufferList,
++ void **ppDataOut, uint32_t * pLength)
++{
++ *ppDataOut = pBufferList->pBuffers->pData;
++ *pLength = pBufferList->pBuffers->dataLenInBytes;
++}
++
++/* Name : icp_ocfDrvBufferListMemInfo
++ *
++ * Description : This function will set the number of flat buffers in
++ * bufferlist, the size of memory to allocate for the pPrivateMetaData
++ * member of the CpaBufferList.
++ */
++int
++icp_ocfDrvBufferListMemInfo(uint16_t numBuffers,
++ struct icp_drvBuffListInfo *buffListInfo)
++{
++ buffListInfo->numBuffers = numBuffers;
++
++ if (CPA_STATUS_SUCCESS !=
++ cpaCyBufferListGetMetaSize(CPA_INSTANCE_HANDLE_SINGLE,
++ buffListInfo->numBuffers,
++ &(buffListInfo->metaSize))) {
++ EPRINTK("%s() Failed to get buffer list meta size.\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvGetSkBuffFrags
++ *
++ * Description : This function will determine the number of
++ * fragments in a socket buffer(sk_buff).
++ */
++inline uint16_t icp_ocfDrvGetSkBuffFrags(struct sk_buff * pSkb)
++{
++ uint16_t numFrags = 0;
++ struct sk_buff *pCurFrag = NULL;
++ struct skb_shared_info *pShInfo = NULL;
++
++ if (NULL == pSkb)
++ return 0;
++
++ numFrags = 1;
++ if (0 == skb_is_nonlinear(pSkb)) {
++ /* Linear buffer - it's a single skbuff */
++ return numFrags;
++ }
++
++ pShInfo = skb_shinfo(pSkb);
++ if (NULL != pShInfo->frag_list && 0 != pShInfo->nr_frags) {
++ EPRINTK("%s(): Combination of frag_list "
++ "and frags[] array not supported!\n", __FUNCTION__);
++ return 0;
++ } else if (0 != pShInfo->nr_frags) {
++ numFrags += pShInfo->nr_frags;
++ return numFrags;
++ } else if (NULL != pShInfo->frag_list) {
++ for (pCurFrag = pShInfo->frag_list;
++ pCurFrag != NULL; pCurFrag = pCurFrag->next) {
++ numFrags++;
++ }
++ return numFrags;
++ } else {
++ return 0;
++ }
++}
++
++/* Name : icp_ocfDrvFreeFlatBuffer
++ *
++ * Description : This function will deallocate flat buffer.
++ */
++inline void icp_ocfDrvFreeFlatBuffer(CpaFlatBuffer * pFlatBuffer)
++{
++ if (pFlatBuffer != NULL) {
++ memset(pFlatBuffer, 0, sizeof(CpaFlatBuffer));
++ kmem_cache_free(drvFlatBuffer_zone, pFlatBuffer);
++ }
++}
++
++/* Name : icp_ocfDrvAllocMetaData
++ *
++ * Description : This function will allocate memory for the
++ * pPrivateMetaData member of CpaBufferList.
++ */
++inline int
++icp_ocfDrvAllocMetaData(CpaBufferList * pBufferList,
++ const struct icp_drvOpData *pOpData)
++{
++ Cpa32U metaSize = 0;
++
++ if (pBufferList->numBuffers <= ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS){
++ void *pOpDataStartAddr = (void *)pOpData;
++
++ if (0 == defBuffListInfo.metaSize) {
++ pBufferList->pPrivateMetaData = NULL;
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++ }
++ /*
++ * The meta data allocation has been included as part of the
++ * op data. It has been pre-allocated in memory just after the
++ * icp_drvOpData structure.
++ */
++ pBufferList->pPrivateMetaData = pOpDataStartAddr +
++ sizeof(struct icp_drvOpData);
++ } else {
++ if (CPA_STATUS_SUCCESS !=
++ cpaCyBufferListGetMetaSize(CPA_INSTANCE_HANDLE_SINGLE,
++ pBufferList->numBuffers,
++ &metaSize)) {
++ EPRINTK("%s() Failed to get buffer list meta size.\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ if (0 == metaSize) {
++ pBufferList->pPrivateMetaData = NULL;
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++ }
++
++ pBufferList->pPrivateMetaData = kmalloc(metaSize, GFP_ATOMIC);
++ }
++ if (NULL == pBufferList->pPrivateMetaData) {
++ EPRINTK("%s() Failed to allocate pPrivateMetaData.\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvFreeMetaData
++ *
++ * Description : This function will deallocate pPrivateMetaData memory.
++ */
++inline void icp_ocfDrvFreeMetaData(CpaBufferList * pBufferList)
++{
++ if (NULL == pBufferList->pPrivateMetaData) {
++ return;
++ }
++
++ /*
++ * Only free the meta data if the BufferList has more than
++ * ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS number of buffers.
++ * Otherwise, the meta data shall be freed when the icp_drvOpData is
++ * freed.
++ */
++ if (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS < pBufferList->numBuffers){
++ kfree(pBufferList->pPrivateMetaData);
++ }
++}
++
++module_init(icp_ocfDrvInit);
++module_exit(icp_ocfDrvExit);
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("Intel");
++MODULE_DESCRIPTION("OCF Driver for Intel Quick Assist crypto acceleration");
+diff -Nur linux-2.6.30.orig/crypto/ocf/ep80579/icp_ocf.h linux-2.6.30/crypto/ocf/ep80579/icp_ocf.h
+--- linux-2.6.30.orig/crypto/ocf/ep80579/icp_ocf.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ep80579/icp_ocf.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,363 @@
++/***************************************************************************
++ *
++ * This file is provided under a dual BSD/GPLv2 license. When using or
++ * redistributing this file, you may do so under either license.
++ *
++ * GPL LICENSE SUMMARY
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of version 2 of the GNU General Public License as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
++ * The full GNU General Public License is included in this distribution
++ * in the file called LICENSE.GPL.
++ *
++ * Contact Information:
++ * Intel Corporation
++ *
++ * BSD LICENSE
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * * Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * * Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in
++ * the documentation and/or other materials provided with the
++ * distribution.
++ * * Neither the name of Intel Corporation nor the names of its
++ * contributors may be used to endorse or promote products derived
++ * from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
++ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
++ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
++ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
++ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
++ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ *
++ * version: Security.L.1.0.130
++ *
++ ***************************************************************************/
++
++/*
++ * OCF drv driver header file for the Intel ICP processor.
++ */
++
++#ifndef ICP_OCF_H
++#define ICP_OCF_H
++
++#include <linux/crypto.h>
++#include <linux/delay.h>
++#include <linux/skbuff.h>
++
++#include "cryptodev.h"
++#include "uio.h"
++
++#include "cpa.h"
++#include "cpa_cy_im.h"
++#include "cpa_cy_sym.h"
++#include "cpa_cy_rand.h"
++#include "cpa_cy_dh.h"
++#include "cpa_cy_rsa.h"
++#include "cpa_cy_ln.h"
++#include "cpa_cy_common.h"
++#include "cpa_cy_dsa.h"
++
++#define NUM_BITS_IN_BYTE (8)
++#define NUM_BITS_IN_BYTE_MINUS_ONE (NUM_BITS_IN_BYTE -1)
++#define INVALID_DRIVER_ID (-1)
++#define RETURN_RAND_NUM_GEN_FAILED (-1)
++
++/*This is define means only one operation can be chained to another
++(resulting in one chain of two operations)*/
++#define MAX_NUM_OF_CHAINED_OPS (1)
++/*This is the max block cipher initialisation vector*/
++#define MAX_IV_LEN_IN_BYTES (20)
++/*This is used to check whether the OCF to this driver session limit has
++ been disabled*/
++#define NO_OCF_TO_DRV_MAX_SESSIONS (0)
++
++/*OCF values mapped here*/
++#define ICP_SHA1_DIGEST_SIZE_IN_BYTES (SHA1_HASH_LEN)
++#define ICP_SHA256_DIGEST_SIZE_IN_BYTES (SHA2_256_HASH_LEN)
++#define ICP_SHA384_DIGEST_SIZE_IN_BYTES (SHA2_384_HASH_LEN)
++#define ICP_SHA512_DIGEST_SIZE_IN_BYTES (SHA2_512_HASH_LEN)
++#define ICP_MD5_DIGEST_SIZE_IN_BYTES (MD5_HASH_LEN)
++#define ARC4_COUNTER_LEN (ARC4_BLOCK_LEN)
++
++#define OCF_REGISTRATION_STATUS_SUCCESS (0)
++#define OCF_ZERO_FUNCTIONALITY_REGISTERED (0)
++#define ICP_OCF_DRV_NO_CRYPTO_PROCESS_ERROR (0)
++#define ICP_OCF_DRV_STATUS_SUCCESS (0)
++#define ICP_OCF_DRV_STATUS_FAIL (1)
++
++/*Turn on/off debug options*/
++#define ICP_OCF_PRINT_DEBUG_MESSAGES (0)
++#define ICP_OCF_PRINT_KERN_ALERT (1)
++#define ICP_OCF_PRINT_KERN_ERRS (1)
++
++/*DSA Prime Q size in bytes (as defined in the standard) */
++#define DSA_RS_SIGN_PRIMEQ_SIZE_IN_BYTES (20)
++
++/*MACRO DEFINITIONS*/
++
++#define BITS_TO_BYTES(bytes, bits) \
++ bytes = (bits + NUM_BITS_IN_BYTE_MINUS_ONE) / NUM_BITS_IN_BYTE
++
++#define ICP_CACHE_CREATE(cache_ID, cache_name) \
++ kmem_cache_create(cache_ID, sizeof(cache_name),0, \
++ SLAB_HWCACHE_ALIGN, NULL, NULL);
++
++#define ICP_CACHE_NULL_CHECK(slab_zone) \
++{ \
++ if(NULL == slab_zone){ \
++ icp_ocfDrvFreeCaches(); \
++ EPRINTK("%s() line %d: Not enough memory!\n", \
++ __FUNCTION__, __LINE__); \
++ return ENOMEM; \
++ } \
++}
++
++#define ICP_CACHE_DESTROY(slab_zone) \
++{ \
++ if(NULL != slab_zone){ \
++ kmem_cache_destroy(slab_zone); \
++ slab_zone = NULL; \
++ } \
++}
++
++#define ICP_REGISTER_SYM_FUNCTIONALITY_WITH_OCF(alg) \
++{ \
++ if(OCF_REGISTRATION_STATUS_SUCCESS == \
++ crypto_register(icp_ocfDrvDriverId, \
++ alg, \
++ 0, \
++ 0)) { \
++ ocfStatus++; \
++ } \
++}
++
++#define ICP_REGISTER_ASYM_FUNCTIONALITY_WITH_OCF(alg) \
++{ \
++ if(OCF_REGISTRATION_STATUS_SUCCESS == \
++ crypto_kregister(icp_ocfDrvDriverId, \
++ alg, \
++ 0)){ \
++ ocfStatus++; \
++ } \
++}
++
++#if ICP_OCF_PRINT_DEBUG_MESSAGES == 1
++#define DPRINTK(args...) \
++{ \
++ printk(args); \
++}
++
++#else //ICP_OCF_PRINT_DEBUG_MESSAGES == 1
++
++#define DPRINTK(args...)
++
++#endif //ICP_OCF_PRINT_DEBUG_MESSAGES == 1
++
++#if ICP_OCF_PRINT_KERN_ALERT == 1
++#define APRINTK(args...) \
++{ \
++ printk(KERN_ALERT args); \
++}
++
++#else //ICP_OCF_PRINT_KERN_ALERT == 1
++
++#define APRINTK(args...)
++
++#endif //ICP_OCF_PRINT_KERN_ALERT == 1
++
++#if ICP_OCF_PRINT_KERN_ERRS == 1
++#define EPRINTK(args...) \
++{ \
++ printk(KERN_ERR args); \
++}
++
++#else //ICP_OCF_PRINT_KERN_ERRS == 1
++
++#define EPRINTK(args...)
++
++#endif //ICP_OCF_PRINT_KERN_ERRS == 1
++
++#define IPRINTK(args...) \
++{ \
++ printk(KERN_INFO args); \
++}
++
++/*END OF MACRO DEFINITIONS*/
++
++typedef enum {
++ ICP_OCF_DRV_ALG_CIPHER = 0,
++ ICP_OCF_DRV_ALG_HASH
++} icp_ocf_drv_alg_type_t;
++
++/* These are all defined in icp_common.c */
++extern atomic_t lac_session_failed_dereg_count;
++extern atomic_t icp_ocfDrvIsExiting;
++extern atomic_t num_ocf_to_drv_registered_sessions;
++
++/*These are use inputs used in icp_sym.c and icp_common.c
++ They are instantiated in icp_common.c*/
++extern int max_sessions;
++
++extern int32_t icp_ocfDrvDriverId;
++extern struct list_head icp_ocfDrvGlobalSymListHead;
++extern struct list_head icp_ocfDrvGlobalSymListHead_FreeMemList;
++extern struct workqueue_struct *icp_ocfDrvFreeLacSessionWorkQ;
++extern spinlock_t icp_ocfDrvSymSessInfoListSpinlock;
++extern rwlock_t icp_kmem_cache_destroy_alloc_lock;
++
++/*Slab zones for symettric functionality, instantiated in icp_common.c*/
++extern struct kmem_cache *drvSessionData_zone;
++extern struct kmem_cache *drvOpData_zone;
++
++/*Slabs zones for asymettric functionality, instantiated in icp_common.c*/
++extern struct kmem_cache *drvDH_zone;
++extern struct kmem_cache *drvLnModExp_zone;
++extern struct kmem_cache *drvRSADecrypt_zone;
++extern struct kmem_cache *drvRSAPrivateKey_zone;
++extern struct kmem_cache *drvDSARSSign_zone;
++extern struct kmem_cache *drvDSARSSignKValue_zone;
++extern struct kmem_cache *drvDSAVerify_zone;
++
++/*Slab zones for flatbuffers and bufferlist*/
++extern struct kmem_cache *drvFlatBuffer_zone;
++
++#define ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS (16)
++
++struct icp_drvBuffListInfo {
++ Cpa16U numBuffers;
++ Cpa32U metaSize;
++ Cpa32U metaOffset;
++ Cpa32U buffListSize;
++};
++extern struct icp_drvBuffListInfo defBuffListInfo;
++
++/*
++* This struct is used to keep a reference to the relevant node in the list
++* of sessionData structs, to the buffer type required by OCF and to the OCF
++* provided crp struct that needs to be returned. All this info is needed in
++* the callback function.
++*
++* IV can sometimes be stored in non-contiguous memory (e.g. skbuff
++* linked/frag list, therefore a contiguous memory space for the IV data must be
++* created and passed to LAC
++*
++*/
++struct icp_drvOpData {
++ CpaCySymOpData lacOpData;
++ uint32_t digestSizeInBytes;
++ struct cryptop *crp;
++ uint8_t bufferType;
++ uint8_t ivData[MAX_IV_LEN_IN_BYTES];
++ uint16_t numBufferListArray;
++ CpaBufferList srcBuffer;
++ CpaFlatBuffer bufferListArray[ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS];
++ CpaBoolean verifyResult;
++};
++/*Values used to derisk chances of performs being called against
++deregistered sessions (for which the slab page has been reclaimed)
++This is not a fix - since page frames are reclaimed from a slab, one cannot
++rely on that memory not being re-used by another app.*/
++typedef enum {
++ ICP_SESSION_INITIALISED = 0x5C5C5C,
++ ICP_SESSION_RUNNING = 0x005C00,
++ ICP_SESSION_DEREGISTERED = 0xC5C5C5
++} usage_derisk;
++
++/*
++This is the OCF<->OCF_DRV session object:
++
++1.The first member is a listNode. These session objects are added to a linked
++ list in order to make it easier to remove them all at session exit time.
++2.The second member is used to give the session object state and derisk the
++ possibility of OCF batch calls executing against a deregistered session (as
++ described above).
++3.The third member is a LAC<->OCF_DRV session handle (initialised with the first
++ perform request for that session).
++4.The fourth is the LAC session context. All the parameters for this structure
++ are only known when the first perform request for this session occurs. That is
++ why the OCF Tolapai Driver only registers a new LAC session at perform time
++*/
++struct icp_drvSessionData {
++ struct list_head listNode;
++ usage_derisk inUse;
++ CpaCySymSessionCtx sessHandle;
++ CpaCySymSessionSetupData lacSessCtx;
++};
++
++/* This struct is required for deferred session
++ deregistration as a work queue function can
++ only have one argument*/
++struct icp_ocfDrvFreeLacSession {
++ CpaCySymSessionCtx sessionToDeregister;
++ struct work_struct work;
++};
++
++int icp_ocfDrvNewSession(device_t dev, uint32_t * sild, struct cryptoini *cri);
++
++int icp_ocfDrvFreeLACSession(device_t dev, uint64_t sid);
++
++int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint);
++
++int icp_ocfDrvPkeProcess(device_t dev, struct cryptkop *krp, int hint);
++
++int icp_ocfDrvReadRandom(void *arg, uint32_t * buf, int maxwords);
++
++int icp_ocfDrvDeregRetry(CpaCySymSessionCtx sessionToDeregister);
++
++int icp_ocfDrvSkBuffToBufferList(struct sk_buff *skb,
++ CpaBufferList * bufferList);
++
++int icp_ocfDrvBufferListToSkBuff(CpaBufferList * bufferList,
++ struct sk_buff **skb);
++
++void icp_ocfDrvPtrAndLenToFlatBuffer(void *pData, uint32_t len,
++ CpaFlatBuffer * pFlatBuffer);
++
++void icp_ocfDrvPtrAndLenToBufferList(void *pDataIn, uint32_t length,
++ CpaBufferList * pBufferList);
++
++void icp_ocfDrvBufferListToPtrAndLen(CpaBufferList * pBufferList,
++ void **ppDataOut, uint32_t * pLength);
++
++int icp_ocfDrvBufferListMemInfo(uint16_t numBuffers,
++ struct icp_drvBuffListInfo *buffListInfo);
++
++uint16_t icp_ocfDrvGetSkBuffFrags(struct sk_buff *pSkb);
++
++void icp_ocfDrvFreeFlatBuffer(CpaFlatBuffer * pFlatBuffer);
++
++int icp_ocfDrvAllocMetaData(CpaBufferList * pBufferList,
++ const struct icp_drvOpData *pOpData);
++
++void icp_ocfDrvFreeMetaData(CpaBufferList * pBufferList);
++
++#endif
++/* ICP_OCF_H */
+diff -Nur linux-2.6.30.orig/crypto/ocf/ep80579/icp_sym.c linux-2.6.30/crypto/ocf/ep80579/icp_sym.c
+--- linux-2.6.30.orig/crypto/ocf/ep80579/icp_sym.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ep80579/icp_sym.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1382 @@
++/***************************************************************************
++ *
++ * This file is provided under a dual BSD/GPLv2 license. When using or
++ * redistributing this file, you may do so under either license.
++ *
++ * GPL LICENSE SUMMARY
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of version 2 of the GNU General Public License as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
++ * The full GNU General Public License is included in this distribution
++ * in the file called LICENSE.GPL.
++ *
++ * Contact Information:
++ * Intel Corporation
++ *
++ * BSD LICENSE
++ *
++ * Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * * Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * * Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in
++ * the documentation and/or other materials provided with the
++ * distribution.
++ * * Neither the name of Intel Corporation nor the names of its
++ * contributors may be used to endorse or promote products derived
++ * from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
++ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
++ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
++ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
++ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
++ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ *
++ * version: Security.L.1.0.130
++ *
++ ***************************************************************************/
++/*
++ * An OCF module that uses the API for Intel® QuickAssist Technology to do the
++ * cryptography.
++ *
++ * This driver requires the ICP Access Library that is available from Intel in
++ * order to operate.
++ */
++
++#include "icp_ocf.h"
++
++/*This is the call back function for all symmetric cryptographic processes.
++ Its main functionality is to free driver crypto operation structure and to
++ call back to OCF*/
++static void
++icp_ocfDrvSymCallBack(void *callbackTag,
++ CpaStatus status,
++ const CpaCySymOp operationType,
++ void *pOpData,
++ CpaBufferList * pDstBuffer, CpaBoolean verifyResult);
++
++/*This function is used to extract crypto processing information from the OCF
++ inputs, so as that it may be passed onto LAC*/
++static int
++icp_ocfDrvProcessDataSetup(struct icp_drvOpData *drvOpData,
++ struct cryptodesc *crp_desc);
++
++/*This function checks whether the crp_desc argument pertains to a digest or a
++ cipher operation*/
++static int icp_ocfDrvAlgCheck(struct cryptodesc *crp_desc);
++
++/*This function copies all the passed in session context information and stores
++ it in a LAC context structure*/
++static int
++icp_ocfDrvAlgorithmSetup(struct cryptoini *cri,
++ CpaCySymSessionSetupData * lacSessCtx);
++
++/*This top level function is used to find a pointer to where a digest is
++ stored/needs to be inserted. */
++static uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData *drvOpData,
++ struct cryptodesc *crp_desc);
++
++/*This function is called when a digest pointer has to be found within a
++ SKBUFF.*/
++static inline uint8_t *icp_ocfDrvSkbuffDigestPointerFind(struct icp_drvOpData
++ *drvOpData,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes);
++
++/*The following two functions are called if the SKBUFF digest pointer is not
++ positioned in the linear portion of the buffer (i.e. it is in a linked SKBUFF
++ or page fragment).*/
++/*This function takes care of the page fragment case.*/
++static inline uint8_t *icp_ocfDrvDigestSkbNRFragsCheck(struct sk_buff *skb,
++ struct skb_shared_info
++ *skb_shared,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes);
++
++/*This function takes care of the linked list case.*/
++static inline uint8_t *icp_ocfDrvDigestSkbFragListCheck(struct sk_buff *skb,
++ struct skb_shared_info
++ *skb_shared,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes);
++
++/*This function is used to free an OCF->OCF_DRV session object*/
++static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData);
++
++/*max IOV buffs supported in a UIO structure*/
++#define NUM_IOV_SUPPORTED (1)
++
++/* Name : icp_ocfDrvSymCallBack
++ *
++ * Description : When this function returns it signifies that the LAC
++ * component has completed the relevant symmetric operation.
++ *
++ * Notes : The callbackTag is a pointer to an icp_drvOpData. This memory
++ * object was passed to LAC for the cryptographic processing and contains all
++ * the relevant information for cleaning up buffer handles etc. so that the
++ * OCF Tolapai Driver portion of this crypto operation can be fully completed.
++ */
++static void
++icp_ocfDrvSymCallBack(void *callbackTag,
++ CpaStatus status,
++ const CpaCySymOp operationType,
++ void *pOpData,
++ CpaBufferList * pDstBuffer, CpaBoolean verifyResult)
++{
++ struct cryptop *crp = NULL;
++ struct icp_drvOpData *temp_drvOpData =
++ (struct icp_drvOpData *)callbackTag;
++ uint64_t *tempBasePtr = NULL;
++ uint32_t tempLen = 0;
++
++ if (NULL == temp_drvOpData) {
++ DPRINTK("%s(): The callback from the LAC component"
++ " has failed due to Null userOpaque data"
++ "(status == %d).\n", __FUNCTION__, status);
++ DPRINTK("%s(): Unable to call OCF back! \n", __FUNCTION__);
++ return;
++ }
++
++ crp = temp_drvOpData->crp;
++ crp->crp_etype = ICP_OCF_DRV_NO_CRYPTO_PROCESS_ERROR;
++
++ if (NULL == pOpData) {
++ DPRINTK("%s(): The callback from the LAC component"
++ " has failed due to Null Symmetric Op data"
++ "(status == %d).\n", __FUNCTION__, status);
++ crp->crp_etype = ECANCELED;
++ crypto_done(crp);
++ return;
++ }
++
++ if (NULL == pDstBuffer) {
++ DPRINTK("%s(): The callback from the LAC component"
++ " has failed due to Null Dst Bufferlist data"
++ "(status == %d).\n", __FUNCTION__, status);
++ crp->crp_etype = ECANCELED;
++ crypto_done(crp);
++ return;
++ }
++
++ if (CPA_STATUS_SUCCESS == status) {
++
++ if (temp_drvOpData->bufferType == CRYPTO_F_SKBUF) {
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvBufferListToSkBuff(pDstBuffer,
++ (struct sk_buff **)
++ &(crp->crp_buf))) {
++ EPRINTK("%s(): BufferList to SkBuff "
++ "conversion error.\n", __FUNCTION__);
++ crp->crp_etype = EPERM;
++ }
++ } else {
++ icp_ocfDrvBufferListToPtrAndLen(pDstBuffer,
++ (void **)&tempBasePtr,
++ &tempLen);
++ crp->crp_olen = (int)tempLen;
++ }
++
++ } else {
++ DPRINTK("%s(): The callback from the LAC component has failed"
++ "(status == %d).\n", __FUNCTION__, status);
++
++ crp->crp_etype = ECANCELED;
++ }
++
++ if (temp_drvOpData->numBufferListArray >
++ ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) {
++ kfree(pDstBuffer->pBuffers);
++ }
++ icp_ocfDrvFreeMetaData(pDstBuffer);
++ kmem_cache_free(drvOpData_zone, temp_drvOpData);
++
++ /* Invoke the OCF callback function */
++ crypto_done(crp);
++
++ return;
++}
++
++/* Name : icp_ocfDrvNewSession
++ *
++ * Description : This function will create a new Driver<->OCF session
++ *
++ * Notes : LAC session registration happens during the first perform call.
++ * That is the first time we know all information about a given session.
++ */
++int icp_ocfDrvNewSession(device_t dev, uint32_t * sid, struct cryptoini *cri)
++{
++ struct icp_drvSessionData *sessionData = NULL;
++ uint32_t delete_session = 0;
++
++ /* The SID passed in should be our driver ID. We can return the */
++ /* local ID (LID) which is a unique identifier which we can use */
++ /* to differentiate between the encrypt/decrypt LAC session handles */
++ if (NULL == sid) {
++ EPRINTK("%s(): Invalid input parameters - NULL sid.\n",
++ __FUNCTION__);
++ return EINVAL;
++ }
++
++ if (NULL == cri) {
++ EPRINTK("%s(): Invalid input parameters - NULL cryptoini.\n",
++ __FUNCTION__);
++ return EINVAL;
++ }
++
++ if (icp_ocfDrvDriverId != *sid) {
++ EPRINTK("%s(): Invalid input parameters - bad driver ID\n",
++ __FUNCTION__);
++ EPRINTK("\t sid = 0x08%p \n \t cri = 0x08%p \n", sid, cri);
++ return EINVAL;
++ }
++
++ sessionData = kmem_cache_zalloc(drvSessionData_zone, GFP_ATOMIC);
++ if (NULL == sessionData) {
++ DPRINTK("%s():No memory for Session Data\n", __FUNCTION__);
++ return ENOMEM;
++ }
++
++ /*ENTER CRITICAL SECTION */
++ spin_lock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++ /*put this check in the spinlock so no new sessions can be added to the
++ linked list when we are exiting */
++ if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) {
++ delete_session++;
++
++ } else if (NO_OCF_TO_DRV_MAX_SESSIONS != max_sessions) {
++ if (atomic_read(&num_ocf_to_drv_registered_sessions) >=
++ (max_sessions -
++ atomic_read(&lac_session_failed_dereg_count))) {
++ delete_session++;
++ } else {
++ atomic_inc(&num_ocf_to_drv_registered_sessions);
++ /* Add to session data linked list */
++ list_add(&(sessionData->listNode),
++ &icp_ocfDrvGlobalSymListHead);
++ }
++
++ } else if (NO_OCF_TO_DRV_MAX_SESSIONS == max_sessions) {
++ list_add(&(sessionData->listNode),
++ &icp_ocfDrvGlobalSymListHead);
++ }
++
++ sessionData->inUse = ICP_SESSION_INITIALISED;
++
++ /*EXIT CRITICAL SECTION */
++ spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++
++ if (delete_session) {
++ DPRINTK("%s():No Session handles available\n", __FUNCTION__);
++ kmem_cache_free(drvSessionData_zone, sessionData);
++ return EPERM;
++ }
++
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvAlgorithmSetup(cri, &(sessionData->lacSessCtx))) {
++ DPRINTK("%s():algorithm not supported\n", __FUNCTION__);
++ icp_ocfDrvFreeOCFSession(sessionData);
++ return EINVAL;
++ }
++
++ if (cri->cri_next) {
++ if (cri->cri_next->cri_next != NULL) {
++ DPRINTK("%s():only two chained algorithms supported\n",
++ __FUNCTION__);
++ icp_ocfDrvFreeOCFSession(sessionData);
++ return EPERM;
++ }
++
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvAlgorithmSetup(cri->cri_next,
++ &(sessionData->lacSessCtx))) {
++ DPRINTK("%s():second algorithm not supported\n",
++ __FUNCTION__);
++ icp_ocfDrvFreeOCFSession(sessionData);
++ return EINVAL;
++ }
++
++ sessionData->lacSessCtx.symOperation =
++ CPA_CY_SYM_OP_ALGORITHM_CHAINING;
++ }
++
++ *sid = (uint32_t) sessionData;
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvAlgorithmSetup
++ *
++ * Description : This function builds the session context data from the
++ * information supplied through OCF. Algorithm chain order and whether the
++ * session is Encrypt/Decrypt can only be found out at perform time however, so
++ * the session is registered with LAC at that time.
++ */
++static int
++icp_ocfDrvAlgorithmSetup(struct cryptoini *cri,
++ CpaCySymSessionSetupData * lacSessCtx)
++{
++
++ lacSessCtx->sessionPriority = CPA_CY_PRIORITY_NORMAL;
++
++ switch (cri->cri_alg) {
++
++ case CRYPTO_NULL_CBC:
++ DPRINTK("%s(): NULL CBC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_CIPHER;
++ lacSessCtx->cipherSetupData.cipherAlgorithm =
++ CPA_CY_SYM_CIPHER_NULL;
++ lacSessCtx->cipherSetupData.cipherKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->cipherSetupData.pCipherKey = cri->cri_key;
++ break;
++
++ case CRYPTO_DES_CBC:
++ DPRINTK("%s(): DES CBC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_CIPHER;
++ lacSessCtx->cipherSetupData.cipherAlgorithm =
++ CPA_CY_SYM_CIPHER_DES_CBC;
++ lacSessCtx->cipherSetupData.cipherKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->cipherSetupData.pCipherKey = cri->cri_key;
++ break;
++
++ case CRYPTO_3DES_CBC:
++ DPRINTK("%s(): 3DES CBC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_CIPHER;
++ lacSessCtx->cipherSetupData.cipherAlgorithm =
++ CPA_CY_SYM_CIPHER_3DES_CBC;
++ lacSessCtx->cipherSetupData.cipherKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->cipherSetupData.pCipherKey = cri->cri_key;
++ break;
++
++ case CRYPTO_AES_CBC:
++ DPRINTK("%s(): AES CBC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_CIPHER;
++ lacSessCtx->cipherSetupData.cipherAlgorithm =
++ CPA_CY_SYM_CIPHER_AES_CBC;
++ lacSessCtx->cipherSetupData.cipherKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->cipherSetupData.pCipherKey = cri->cri_key;
++ break;
++
++ case CRYPTO_ARC4:
++ DPRINTK("%s(): ARC4\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_CIPHER;
++ lacSessCtx->cipherSetupData.cipherAlgorithm =
++ CPA_CY_SYM_CIPHER_ARC4;
++ lacSessCtx->cipherSetupData.cipherKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->cipherSetupData.pCipherKey = cri->cri_key;
++ break;
++
++ case CRYPTO_SHA1:
++ DPRINTK("%s(): SHA1\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_SHA1;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA1_DIGEST_SIZE_IN_BYTES);
++
++ break;
++
++ case CRYPTO_SHA1_HMAC:
++ DPRINTK("%s(): SHA1_HMAC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_SHA1;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA1_DIGEST_SIZE_IN_BYTES);
++ lacSessCtx->hashSetupData.authModeSetupData.authKey =
++ cri->cri_key;
++ lacSessCtx->hashSetupData.authModeSetupData.authKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->hashSetupData.authModeSetupData.aadLenInBytes = 0;
++
++ break;
++
++ case CRYPTO_SHA2_256:
++ DPRINTK("%s(): SHA256\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA256;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA256_DIGEST_SIZE_IN_BYTES);
++
++ break;
++
++ case CRYPTO_SHA2_256_HMAC:
++ DPRINTK("%s(): SHA256_HMAC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA256;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA256_DIGEST_SIZE_IN_BYTES);
++ lacSessCtx->hashSetupData.authModeSetupData.authKey =
++ cri->cri_key;
++ lacSessCtx->hashSetupData.authModeSetupData.authKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->hashSetupData.authModeSetupData.aadLenInBytes = 0;
++
++ break;
++
++ case CRYPTO_SHA2_384:
++ DPRINTK("%s(): SHA384\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA384;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA384_DIGEST_SIZE_IN_BYTES);
++
++ break;
++
++ case CRYPTO_SHA2_384_HMAC:
++ DPRINTK("%s(): SHA384_HMAC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA384;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA384_DIGEST_SIZE_IN_BYTES);
++ lacSessCtx->hashSetupData.authModeSetupData.authKey =
++ cri->cri_key;
++ lacSessCtx->hashSetupData.authModeSetupData.authKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->hashSetupData.authModeSetupData.aadLenInBytes = 0;
++
++ break;
++
++ case CRYPTO_SHA2_512:
++ DPRINTK("%s(): SHA512\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA512;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA512_DIGEST_SIZE_IN_BYTES);
++
++ break;
++
++ case CRYPTO_SHA2_512_HMAC:
++ DPRINTK("%s(): SHA512_HMAC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm =
++ CPA_CY_SYM_HASH_SHA512;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_SHA512_DIGEST_SIZE_IN_BYTES);
++ lacSessCtx->hashSetupData.authModeSetupData.authKey =
++ cri->cri_key;
++ lacSessCtx->hashSetupData.authModeSetupData.authKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->hashSetupData.authModeSetupData.aadLenInBytes = 0;
++
++ break;
++
++ case CRYPTO_MD5:
++ DPRINTK("%s(): MD5\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_MD5;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_PLAIN;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_MD5_DIGEST_SIZE_IN_BYTES);
++
++ break;
++
++ case CRYPTO_MD5_HMAC:
++ DPRINTK("%s(): MD5_HMAC\n", __FUNCTION__);
++ lacSessCtx->symOperation = CPA_CY_SYM_OP_HASH;
++ lacSessCtx->hashSetupData.hashAlgorithm = CPA_CY_SYM_HASH_MD5;
++ lacSessCtx->hashSetupData.hashMode = CPA_CY_SYM_HASH_MODE_AUTH;
++ lacSessCtx->hashSetupData.digestResultLenInBytes =
++ (cri->cri_mlen ?
++ cri->cri_mlen : ICP_MD5_DIGEST_SIZE_IN_BYTES);
++ lacSessCtx->hashSetupData.authModeSetupData.authKey =
++ cri->cri_key;
++ lacSessCtx->hashSetupData.authModeSetupData.authKeyLenInBytes =
++ cri->cri_klen / NUM_BITS_IN_BYTE;
++ lacSessCtx->hashSetupData.authModeSetupData.aadLenInBytes = 0;
++
++ break;
++
++ default:
++ DPRINTK("%s(): ALG Setup FAIL\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvFreeOCFSession
++ *
++ * Description : This function deletes all existing Session data representing
++ * the Cryptographic session established between OCF and this driver. This
++ * also includes freeing the memory allocated for the session context. The
++ * session object is also removed from the session linked list.
++ */
++static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData)
++{
++
++ sessionData->inUse = ICP_SESSION_DEREGISTERED;
++
++ /*ENTER CRITICAL SECTION */
++ spin_lock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++
++ if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) {
++ /*If the Driver is exiting, allow that process to
++ handle any deletions */
++ /*EXIT CRITICAL SECTION */
++ spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++ return;
++ }
++
++ atomic_dec(&num_ocf_to_drv_registered_sessions);
++
++ list_del(&(sessionData->listNode));
++
++ /*EXIT CRITICAL SECTION */
++ spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock);
++
++ if (NULL != sessionData->sessHandle) {
++ kfree(sessionData->sessHandle);
++ }
++ kmem_cache_free(drvSessionData_zone, sessionData);
++}
++
++/* Name : icp_ocfDrvFreeLACSession
++ *
++ * Description : This attempts to deregister a LAC session. If it fails, the
++ * deregistation retry function is called.
++ */
++int icp_ocfDrvFreeLACSession(device_t dev, uint64_t sid)
++{
++ CpaCySymSessionCtx sessionToDeregister = NULL;
++ struct icp_drvSessionData *sessionData = NULL;
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ int retval = 0;
++
++ sessionData = (struct icp_drvSessionData *)CRYPTO_SESID2LID(sid);
++ if (NULL == sessionData) {
++ EPRINTK("%s(): OCF Free session called with Null Session ID.\n",
++ __FUNCTION__);
++ return EINVAL;
++ }
++
++ sessionToDeregister = sessionData->sessHandle;
++
++ if (ICP_SESSION_INITIALISED == sessionData->inUse) {
++ DPRINTK("%s() Session not registered with LAC\n", __FUNCTION__);
++ } else if (NULL == sessionData->sessHandle) {
++ EPRINTK
++ ("%s(): OCF Free session called with Null Session Handle.\n",
++ __FUNCTION__);
++ return EINVAL;
++ } else {
++ lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE,
++ sessionToDeregister);
++ if (CPA_STATUS_RETRY == lacStatus) {
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvDeregRetry(&sessionToDeregister)) {
++ /* the retry function increments the
++ dereg failed count */
++ DPRINTK("%s(): LAC failed to deregister the "
++ "session. (localSessionId= %p)\n",
++ __FUNCTION__, sessionToDeregister);
++ retval = EPERM;
++ }
++
++ } else if (CPA_STATUS_SUCCESS != lacStatus) {
++ DPRINTK("%s(): LAC failed to deregister the session. "
++ "localSessionId= %p, lacStatus = %d\n",
++ __FUNCTION__, sessionToDeregister, lacStatus);
++ atomic_inc(&lac_session_failed_dereg_count);
++ retval = EPERM;
++ }
++ }
++
++ icp_ocfDrvFreeOCFSession(sessionData);
++ return retval;
++
++}
++
++/* Name : icp_ocfDrvAlgCheck
++ *
++ * Description : This function checks whether the cryptodesc argument pertains
++ * to a sym or hash function
++ */
++static int icp_ocfDrvAlgCheck(struct cryptodesc *crp_desc)
++{
++
++ if (crp_desc->crd_alg == CRYPTO_3DES_CBC ||
++ crp_desc->crd_alg == CRYPTO_AES_CBC ||
++ crp_desc->crd_alg == CRYPTO_DES_CBC ||
++ crp_desc->crd_alg == CRYPTO_NULL_CBC ||
++ crp_desc->crd_alg == CRYPTO_ARC4) {
++ return ICP_OCF_DRV_ALG_CIPHER;
++ }
++
++ return ICP_OCF_DRV_ALG_HASH;
++}
++
++/* Name : icp_ocfDrvSymProcess
++ *
++ * Description : This function will map symmetric functionality calls from OCF
++ * to the LAC API. It will also allocate memory to store the session context.
++ *
++ * Notes: If it is the first perform call for a given session, then a LAC
++ * session is registered. After the session is registered, no checks as
++ * to whether session paramaters have changed (e.g. alg chain order) are
++ * done.
++ */
++int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint)
++{
++ struct icp_drvSessionData *sessionData = NULL;
++ struct icp_drvOpData *drvOpData = NULL;
++ CpaStatus lacStatus = CPA_STATUS_SUCCESS;
++ Cpa32U sessionCtxSizeInBytes = 0;
++ uint16_t numBufferListArray = 0;
++
++ if (NULL == crp) {
++ DPRINTK("%s(): Invalid input parameters, cryptop is NULL\n",
++ __FUNCTION__);
++ return EINVAL;
++ }
++
++ if (NULL == crp->crp_desc) {
++ DPRINTK("%s(): Invalid input parameters, no crp_desc attached "
++ "to crp\n", __FUNCTION__);
++ crp->crp_etype = EINVAL;
++ return EINVAL;
++ }
++
++ if (NULL == crp->crp_buf) {
++ DPRINTK("%s(): Invalid input parameters, no buffer attached "
++ "to crp\n", __FUNCTION__);
++ crp->crp_etype = EINVAL;
++ return EINVAL;
++ }
++
++ if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) {
++ crp->crp_etype = EFAULT;
++ return EFAULT;
++ }
++
++ sessionData = (struct icp_drvSessionData *)
++ (CRYPTO_SESID2LID(crp->crp_sid));
++ if (NULL == sessionData) {
++ DPRINTK("%s(): Invalid input parameters, Null Session ID \n",
++ __FUNCTION__);
++ crp->crp_etype = EINVAL;
++ return EINVAL;
++ }
++
++/*If we get a request against a deregisted session, cancel operation*/
++ if (ICP_SESSION_DEREGISTERED == sessionData->inUse) {
++ DPRINTK("%s(): Session ID %d was deregistered \n",
++ __FUNCTION__, (int)(CRYPTO_SESID2LID(crp->crp_sid)));
++ crp->crp_etype = EFAULT;
++ return EFAULT;
++ }
++
++/*If none of the session states are set, then the session structure was either
++ not initialised properly or we are reading from a freed memory area (possible
++ due to OCF batch mode not removing queued requests against deregistered
++ sessions*/
++ if (ICP_SESSION_INITIALISED != sessionData->inUse &&
++ ICP_SESSION_RUNNING != sessionData->inUse) {
++ DPRINTK("%s(): Session - ID %d - not properly initialised or "
++ "memory freed back to the kernel \n",
++ __FUNCTION__, (int)(CRYPTO_SESID2LID(crp->crp_sid)));
++ crp->crp_etype = EINVAL;
++ return EINVAL;
++ }
++
++ /*For the below checks, remember error checking is already done in LAC.
++ We're not validating inputs subsequent to registration */
++ if (sessionData->inUse == ICP_SESSION_INITIALISED) {
++ DPRINTK("%s(): Initialising session\n", __FUNCTION__);
++
++ if (NULL != crp->crp_desc->crd_next) {
++ if (ICP_OCF_DRV_ALG_CIPHER ==
++ icp_ocfDrvAlgCheck(crp->crp_desc)) {
++
++ sessionData->lacSessCtx.algChainOrder =
++ CPA_CY_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH;
++
++ if (crp->crp_desc->crd_flags & CRD_F_ENCRYPT) {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_ENCRYPT;
++ } else {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_DECRYPT;
++ }
++ } else {
++ sessionData->lacSessCtx.algChainOrder =
++ CPA_CY_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER;
++
++ if (crp->crp_desc->crd_next->crd_flags &
++ CRD_F_ENCRYPT) {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_ENCRYPT;
++ } else {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_DECRYPT;
++ }
++
++ }
++
++ } else if (ICP_OCF_DRV_ALG_CIPHER ==
++ icp_ocfDrvAlgCheck(crp->crp_desc)) {
++ if (crp->crp_desc->crd_flags & CRD_F_ENCRYPT) {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_ENCRYPT;
++ } else {
++ sessionData->lacSessCtx.cipherSetupData.
++ cipherDirection =
++ CPA_CY_SYM_CIPHER_DIRECTION_DECRYPT;
++ }
++
++ }
++
++ /*No action required for standalone Auth here */
++
++ /* Allocate memory for SymSessionCtx before the Session Registration */
++ lacStatus =
++ cpaCySymSessionCtxGetSize(CPA_INSTANCE_HANDLE_SINGLE,
++ &(sessionData->lacSessCtx),
++ &sessionCtxSizeInBytes);
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): cpaCySymSessionCtxGetSize failed - %d\n",
++ __FUNCTION__, lacStatus);
++ return EINVAL;
++ }
++ sessionData->sessHandle =
++ kmalloc(sessionCtxSizeInBytes, GFP_ATOMIC);
++ if (NULL == sessionData->sessHandle) {
++ EPRINTK
++ ("%s(): Failed to get memory for SymSessionCtx\n",
++ __FUNCTION__);
++ return ENOMEM;
++ }
++
++ lacStatus = cpaCySymInitSession(CPA_INSTANCE_HANDLE_SINGLE,
++ icp_ocfDrvSymCallBack,
++ &(sessionData->lacSessCtx),
++ sessionData->sessHandle);
++
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): cpaCySymInitSession failed -%d \n",
++ __FUNCTION__, lacStatus);
++ return EFAULT;
++ }
++
++ sessionData->inUse = ICP_SESSION_RUNNING;
++ }
++
++ drvOpData = kmem_cache_zalloc(drvOpData_zone, GFP_ATOMIC);
++ if (NULL == drvOpData) {
++ EPRINTK("%s():Failed to get memory for drvOpData\n",
++ __FUNCTION__);
++ crp->crp_etype = ENOMEM;
++ return ENOMEM;
++ }
++
++ drvOpData->lacOpData.pSessionCtx = sessionData->sessHandle;
++ drvOpData->digestSizeInBytes = sessionData->lacSessCtx.hashSetupData.
++ digestResultLenInBytes;
++ drvOpData->crp = crp;
++
++ /* Set the default buffer list array memory allocation */
++ drvOpData->srcBuffer.pBuffers = drvOpData->bufferListArray;
++ drvOpData->numBufferListArray = ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS;
++
++ /*
++ * Allocate buffer list array memory allocation if the
++ * data fragment is more than the default allocation
++ */
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ numBufferListArray = icp_ocfDrvGetSkBuffFrags((struct sk_buff *)
++ crp->crp_buf);
++ if (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS < numBufferListArray) {
++ DPRINTK("%s() numBufferListArray more than default\n",
++ __FUNCTION__);
++ drvOpData->srcBuffer.pBuffers = NULL;
++ drvOpData->srcBuffer.pBuffers =
++ kmalloc(numBufferListArray *
++ sizeof(CpaFlatBuffer), GFP_ATOMIC);
++ if (NULL == drvOpData->srcBuffer.pBuffers) {
++ EPRINTK("%s() Failed to get memory for "
++ "pBuffers\n", __FUNCTION__);
++ kmem_cache_free(drvOpData_zone, drvOpData);
++ crp->crp_etype = ENOMEM;
++ return ENOMEM;
++ }
++ drvOpData->numBufferListArray = numBufferListArray;
++ }
++ }
++
++ /*
++ * Check the type of buffer structure we got and convert it into
++ * CpaBufferList format.
++ */
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvSkBuffToBufferList((struct sk_buff *)crp->crp_buf,
++ &(drvOpData->srcBuffer))) {
++ EPRINTK("%s():Failed to translate from SK_BUF "
++ "to bufferlist\n", __FUNCTION__);
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ drvOpData->bufferType = CRYPTO_F_SKBUF;
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ /* OCF only supports IOV of one entry. */
++ if (NUM_IOV_SUPPORTED ==
++ ((struct uio *)(crp->crp_buf))->uio_iovcnt) {
++
++ icp_ocfDrvPtrAndLenToBufferList(((struct uio *)(crp->
++ crp_buf))->
++ uio_iov[0].iov_base,
++ ((struct uio *)(crp->
++ crp_buf))->
++ uio_iov[0].iov_len,
++ &(drvOpData->
++ srcBuffer));
++
++ drvOpData->bufferType = CRYPTO_F_IOV;
++
++ } else {
++ DPRINTK("%s():Unable to handle IOVs with lengths of "
++ "greater than one!\n", __FUNCTION__);
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ } else {
++ icp_ocfDrvPtrAndLenToBufferList(crp->crp_buf,
++ crp->crp_ilen,
++ &(drvOpData->srcBuffer));
++
++ drvOpData->bufferType = CRYPTO_BUF_CONTIG;
++ }
++
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp->crp_desc)) {
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ if (drvOpData->crp->crp_desc->crd_next != NULL) {
++ if (icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp->
++ crp_desc->crd_next)) {
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ }
++
++ /* Allocate srcBuffer's private meta data */
++ if (ICP_OCF_DRV_STATUS_SUCCESS !=
++ icp_ocfDrvAllocMetaData(&(drvOpData->srcBuffer), drvOpData)) {
++ EPRINTK("%s() icp_ocfDrvAllocMetaData failed\n", __FUNCTION__);
++ memset(&(drvOpData->lacOpData), 0, sizeof(CpaCySymOpData));
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ /* Perform "in-place" crypto operation */
++ lacStatus = cpaCySymPerformOp(CPA_INSTANCE_HANDLE_SINGLE,
++ (void *)drvOpData,
++ &(drvOpData->lacOpData),
++ &(drvOpData->srcBuffer),
++ &(drvOpData->srcBuffer),
++ &(drvOpData->verifyResult));
++ if (CPA_STATUS_RETRY == lacStatus) {
++ DPRINTK("%s(): cpaCySymPerformOp retry, lacStatus = %d\n",
++ __FUNCTION__, lacStatus);
++ memset(&(drvOpData->lacOpData), 0, sizeof(CpaCySymOpData));
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++ if (CPA_STATUS_SUCCESS != lacStatus) {
++ EPRINTK("%s(): cpaCySymPerformOp failed, lacStatus = %d\n",
++ __FUNCTION__, lacStatus);
++ memset(&(drvOpData->lacOpData), 0, sizeof(CpaCySymOpData));
++ crp->crp_etype = EINVAL;
++ goto err;
++ }
++
++ return 0; //OCF success status value
++
++ err:
++ if (drvOpData->numBufferListArray > ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) {
++ kfree(drvOpData->srcBuffer.pBuffers);
++ }
++ icp_ocfDrvFreeMetaData(&(drvOpData->srcBuffer));
++ kmem_cache_free(drvOpData_zone, drvOpData);
++
++ return crp->crp_etype;
++}
++
++/* Name : icp_ocfDrvProcessDataSetup
++ *
++ * Description : This function will setup all the cryptographic operation data
++ * that is required by LAC to execute the operation.
++ */
++static int icp_ocfDrvProcessDataSetup(struct icp_drvOpData *drvOpData,
++ struct cryptodesc *crp_desc)
++{
++ CpaCyRandGenOpData randGenOpData;
++ CpaFlatBuffer randData;
++
++ drvOpData->lacOpData.packetType = CPA_CY_SYM_PACKET_TYPE_FULL;
++
++ /* Convert from the cryptop to the ICP LAC crypto parameters */
++ switch (crp_desc->crd_alg) {
++ case CRYPTO_NULL_CBC:
++ drvOpData->lacOpData.
++ cryptoStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToCipherInBytes = crp_desc->crd_len;
++ drvOpData->verifyResult = CPA_FALSE;
++ drvOpData->lacOpData.ivLenInBytes = NULL_BLOCK_LEN;
++ break;
++ case CRYPTO_DES_CBC:
++ drvOpData->lacOpData.
++ cryptoStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToCipherInBytes = crp_desc->crd_len;
++ drvOpData->verifyResult = CPA_FALSE;
++ drvOpData->lacOpData.ivLenInBytes = DES_BLOCK_LEN;
++ break;
++ case CRYPTO_3DES_CBC:
++ drvOpData->lacOpData.
++ cryptoStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToCipherInBytes = crp_desc->crd_len;
++ drvOpData->verifyResult = CPA_FALSE;
++ drvOpData->lacOpData.ivLenInBytes = DES3_BLOCK_LEN;
++ break;
++ case CRYPTO_ARC4:
++ drvOpData->lacOpData.
++ cryptoStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToCipherInBytes = crp_desc->crd_len;
++ drvOpData->verifyResult = CPA_FALSE;
++ drvOpData->lacOpData.ivLenInBytes = ARC4_COUNTER_LEN;
++ break;
++ case CRYPTO_AES_CBC:
++ drvOpData->lacOpData.
++ cryptoStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToCipherInBytes = crp_desc->crd_len;
++ drvOpData->verifyResult = CPA_FALSE;
++ drvOpData->lacOpData.ivLenInBytes = RIJNDAEL128_BLOCK_LEN;
++ break;
++ case CRYPTO_SHA1:
++ case CRYPTO_SHA1_HMAC:
++ case CRYPTO_SHA2_256:
++ case CRYPTO_SHA2_256_HMAC:
++ case CRYPTO_SHA2_384:
++ case CRYPTO_SHA2_384_HMAC:
++ case CRYPTO_SHA2_512:
++ case CRYPTO_SHA2_512_HMAC:
++ case CRYPTO_MD5:
++ case CRYPTO_MD5_HMAC:
++ drvOpData->lacOpData.
++ hashStartSrcOffsetInBytes = crp_desc->crd_skip;
++ drvOpData->lacOpData.
++ messageLenToHashInBytes = crp_desc->crd_len;
++ drvOpData->lacOpData.
++ pDigestResult =
++ icp_ocfDrvDigestPointerFind(drvOpData, crp_desc);
++
++ if (NULL == drvOpData->lacOpData.pDigestResult) {
++ DPRINTK("%s(): ERROR - could not calculate "
++ "Digest Result memory address\n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ drvOpData->lacOpData.digestVerify = CPA_FALSE;
++ break;
++ default:
++ DPRINTK("%s(): Crypto process error - algorithm not "
++ "found \n", __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ /* Figure out what the IV is supposed to be */
++ if ((crp_desc->crd_alg == CRYPTO_DES_CBC) ||
++ (crp_desc->crd_alg == CRYPTO_3DES_CBC) ||
++ (crp_desc->crd_alg == CRYPTO_AES_CBC)) {
++ /*ARC4 doesn't use an IV */
++ if (crp_desc->crd_flags & CRD_F_IV_EXPLICIT) {
++ /* Explicit IV provided to OCF */
++ drvOpData->lacOpData.pIv = crp_desc->crd_iv;
++ } else {
++ /* IV is not explicitly provided to OCF */
++
++ /* Point the LAC OP Data IV pointer to our allocated
++ storage location for this session. */
++ drvOpData->lacOpData.pIv = drvOpData->ivData;
++
++ if ((crp_desc->crd_flags & CRD_F_ENCRYPT) &&
++ ((crp_desc->crd_flags & CRD_F_IV_PRESENT) == 0)) {
++
++ /* Encrypting - need to create IV */
++ randGenOpData.generateBits = CPA_TRUE;
++ randGenOpData.lenInBytes = MAX_IV_LEN_IN_BYTES;
++
++ icp_ocfDrvPtrAndLenToFlatBuffer((Cpa8U *)
++ drvOpData->
++ ivData,
++ MAX_IV_LEN_IN_BYTES,
++ &randData);
++
++ if (CPA_STATUS_SUCCESS !=
++ cpaCyRandGen(CPA_INSTANCE_HANDLE_SINGLE,
++ NULL, NULL,
++ &randGenOpData, &randData)) {
++ DPRINTK("%s(): ERROR - Failed to"
++ " generate"
++ " Initialisation Vector\n",
++ __FUNCTION__);
++ return ICP_OCF_DRV_STATUS_FAIL;
++ }
++
++ crypto_copyback(drvOpData->crp->
++ crp_flags,
++ drvOpData->crp->crp_buf,
++ crp_desc->crd_inject,
++ drvOpData->lacOpData.
++ ivLenInBytes,
++ (caddr_t) (drvOpData->lacOpData.
++ pIv));
++ } else {
++ /* Reading IV from buffer */
++ crypto_copydata(drvOpData->crp->
++ crp_flags,
++ drvOpData->crp->crp_buf,
++ crp_desc->crd_inject,
++ drvOpData->lacOpData.
++ ivLenInBytes,
++ (caddr_t) (drvOpData->lacOpData.
++ pIv));
++ }
++
++ }
++
++ }
++
++ return ICP_OCF_DRV_STATUS_SUCCESS;
++}
++
++/* Name : icp_ocfDrvDigestPointerFind
++ *
++ * Description : This function is used to find the memory address of where the
++ * digest information shall be stored in. Input buffer types are an skbuff, iov
++ * or flat buffer. The address is found using the buffer data start address and
++ * an offset.
++ *
++ * Note: In the case of a linux skbuff, the digest address may exist within
++ * a memory space linked to from the start buffer. These linked memory spaces
++ * must be traversed by the data length offset in order to find the digest start
++ * address. Whether there is enough space for the digest must also be checked.
++ */
++
++static uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData *drvOpData,
++ struct cryptodesc *crp_desc)
++{
++
++ int offsetInBytes = crp_desc->crd_inject;
++ uint32_t digestSizeInBytes = drvOpData->digestSizeInBytes;
++ uint8_t *flat_buffer_base = NULL;
++ int flat_buffer_length = 0;
++ struct sk_buff *skb;
++
++ if (drvOpData->crp->crp_flags & CRYPTO_F_SKBUF) {
++ /*check if enough overall space to store hash */
++ skb = (struct sk_buff *)(drvOpData->crp->crp_buf);
++
++ if (skb->len < (offsetInBytes + digestSizeInBytes)) {
++ DPRINTK("%s() Not enough space for Digest"
++ " payload after the offset (%d), "
++ "digest size (%d) \n", __FUNCTION__,
++ offsetInBytes, digestSizeInBytes);
++ return NULL;
++ }
++
++ return icp_ocfDrvSkbuffDigestPointerFind(drvOpData,
++ offsetInBytes,
++ digestSizeInBytes);
++
++ } else {
++ /* IOV or flat buffer */
++ if (drvOpData->crp->crp_flags & CRYPTO_F_IOV) {
++ /*single IOV check has already been done */
++ flat_buffer_base = ((struct uio *)
++ (drvOpData->crp->crp_buf))->
++ uio_iov[0].iov_base;
++ flat_buffer_length = ((struct uio *)
++ (drvOpData->crp->crp_buf))->
++ uio_iov[0].iov_len;
++ } else {
++ flat_buffer_base = (uint8_t *) drvOpData->crp->crp_buf;
++ flat_buffer_length = drvOpData->crp->crp_ilen;
++ }
++
++ if (flat_buffer_length < (offsetInBytes + digestSizeInBytes)) {
++ DPRINTK("%s() Not enough space for Digest "
++ "(IOV/Flat Buffer) \n", __FUNCTION__);
++ return NULL;
++ } else {
++ return (uint8_t *) (flat_buffer_base + offsetInBytes);
++ }
++ }
++ DPRINTK("%s() Should not reach this point\n", __FUNCTION__);
++ return NULL;
++}
++
++/* Name : icp_ocfDrvSkbuffDigestPointerFind
++ *
++ * Description : This function is used by icp_ocfDrvDigestPointerFind to process
++ * the non-linear portion of the skbuff if the fragmentation type is a linked
++ * list (frag_list is not NULL in the skb_shared_info structure)
++ */
++static inline uint8_t *icp_ocfDrvSkbuffDigestPointerFind(struct icp_drvOpData
++ *drvOpData,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes)
++{
++
++ struct sk_buff *skb = NULL;
++ struct skb_shared_info *skb_shared = NULL;
++
++ uint32_t skbuffisnonlinear = 0;
++
++ uint32_t skbheadlen = 0;
++
++ skb = (struct sk_buff *)(drvOpData->crp->crp_buf);
++ skbuffisnonlinear = skb_is_nonlinear(skb);
++
++ skbheadlen = skb_headlen(skb);
++
++ /*Linear skb checks */
++ if (skbheadlen > offsetInBytes) {
++
++ if (skbheadlen >= (offsetInBytes + digestSizeInBytes)) {
++ return (uint8_t *) (skb->data + offsetInBytes);
++ } else {
++ DPRINTK("%s() Auth payload stretches "
++ "accross contiguous memory\n", __FUNCTION__);
++ return NULL;
++ }
++ } else {
++ if (skbuffisnonlinear) {
++ offsetInBytes -= skbheadlen;
++ } else {
++ DPRINTK("%s() Offset outside of buffer boundaries\n",
++ __FUNCTION__);
++ return NULL;
++ }
++ }
++
++ /*Non Linear checks */
++ skb_shared = (struct skb_shared_info *)(skb->end);
++ if (unlikely(NULL == skb_shared)) {
++ DPRINTK("%s() skbuff shared info stucture is NULL! \n",
++ __FUNCTION__);
++ return NULL;
++ } else if ((0 != skb_shared->nr_frags) &&
++ (skb_shared->frag_list != NULL)) {
++ DPRINTK("%s() skbuff nr_frags AND "
++ "frag_list not supported \n", __FUNCTION__);
++ return NULL;
++ }
++
++ /*TCP segmentation more likely than IP fragmentation */
++ if (likely(0 != skb_shared->nr_frags)) {
++ return icp_ocfDrvDigestSkbNRFragsCheck(skb, skb_shared,
++ offsetInBytes,
++ digestSizeInBytes);
++ } else if (skb_shared->frag_list != NULL) {
++ return icp_ocfDrvDigestSkbFragListCheck(skb, skb_shared,
++ offsetInBytes,
++ digestSizeInBytes);
++ } else {
++ DPRINTK("%s() skbuff is non-linear but does not show any "
++ "linked data\n", __FUNCTION__);
++ return NULL;
++ }
++
++}
++
++/* Name : icp_ocfDrvDigestSkbNRFragsCheck
++ *
++ * Description : This function is used by icp_ocfDrvSkbuffDigestPointerFind to
++ * process the non-linear portion of the skbuff, if the fragmentation type is
++ * page fragments
++ */
++static inline uint8_t *icp_ocfDrvDigestSkbNRFragsCheck(struct sk_buff *skb,
++ struct skb_shared_info
++ *skb_shared,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes)
++{
++ int i = 0;
++ /*nr_frags starts from 1 */
++ if (MAX_SKB_FRAGS < skb_shared->nr_frags) {
++ DPRINTK("%s error processing skbuff "
++ "page frame -- MAX FRAGS exceeded \n", __FUNCTION__);
++ return NULL;
++ }
++
++ for (i = 0; i < skb_shared->nr_frags; i++) {
++
++ if (offsetInBytes >= skb_shared->frags[i].size) {
++ /*offset still greater than data position */
++ offsetInBytes -= skb_shared->frags[i].size;
++ } else {
++ /* found the page containing start of hash */
++
++ if (NULL == skb_shared->frags[i].page) {
++ DPRINTK("%s() Linked page is NULL!\n",
++ __FUNCTION__);
++ return NULL;
++ }
++
++ if (offsetInBytes + digestSizeInBytes >
++ skb_shared->frags[i].size) {
++ DPRINTK("%s() Auth payload stretches accross "
++ "contiguous memory\n", __FUNCTION__);
++ return NULL;
++ } else {
++ return (uint8_t *) (skb_shared->frags[i].page +
++ skb_shared->frags[i].
++ page_offset +
++ offsetInBytes);
++ }
++ }
++ /*only possible if internal page sizes are set wrong */
++ if (offsetInBytes < 0) {
++ DPRINTK("%s error processing skbuff page frame "
++ "-- offset calculation \n", __FUNCTION__);
++ return NULL;
++ }
++ }
++ /*only possible if internal page sizes are set wrong */
++ DPRINTK("%s error processing skbuff page frame "
++ "-- ran out of page fragments, remaining offset = %d \n",
++ __FUNCTION__, offsetInBytes);
++ return NULL;
++
++}
++
++/* Name : icp_ocfDrvDigestSkbFragListCheck
++ *
++ * Description : This function is used by icp_ocfDrvSkbuffDigestPointerFind to
++ * process the non-linear portion of the skbuff, if the fragmentation type is
++ * a linked list
++ *
++ */
++static inline uint8_t *icp_ocfDrvDigestSkbFragListCheck(struct sk_buff *skb,
++ struct skb_shared_info
++ *skb_shared,
++ int offsetInBytes,
++ uint32_t
++ digestSizeInBytes)
++{
++
++ struct sk_buff *skb_list = skb_shared->frag_list;
++ /*check added for readability */
++ if (NULL == skb_list) {
++ DPRINTK("%s error processing skbuff "
++ "-- no more list! \n", __FUNCTION__);
++ return NULL;
++ }
++
++ for (; skb_list; skb_list = skb_list->next) {
++ if (NULL == skb_list) {
++ DPRINTK("%s error processing skbuff "
++ "-- no more list! \n", __FUNCTION__);
++ return NULL;
++ }
++
++ if (offsetInBytes >= skb_list->len) {
++ offsetInBytes -= skb_list->len;
++
++ } else {
++ if (offsetInBytes + digestSizeInBytes > skb_list->len) {
++ DPRINTK("%s() Auth payload stretches accross "
++ "contiguous memory\n", __FUNCTION__);
++ return NULL;
++ } else {
++ return (uint8_t *)
++ (skb_list->data + offsetInBytes);
++ }
++
++ }
++
++ /*This check is only needed if internal skb_list length values
++ are set wrong. */
++ if (0 > offsetInBytes) {
++ DPRINTK("%s() error processing skbuff object -- offset "
++ "calculation \n", __FUNCTION__);
++ return NULL;
++ }
++
++ }
++
++ /*catch all for unusual for-loop exit.
++ This code should never be reached */
++ DPRINTK("%s() Catch-All hit! Process error.\n", __FUNCTION__);
++ return NULL;
++}
+diff -Nur linux-2.6.30.orig/crypto/ocf/ep80579/Makefile linux-2.6.30/crypto/ocf/ep80579/Makefile
+--- linux-2.6.30.orig/crypto/ocf/ep80579/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ep80579/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,107 @@
++#########################################################################
++#
++# Targets supported
++# all - builds everything and installs
++# install - identical to all
++# depend - build dependencies
++# clean - clears derived objects except the .depend files
++# distclean- clears all derived objects and the .depend file
++#
++# @par
++# This file is provided under a dual BSD/GPLv2 license. When using or
++# redistributing this file, you may do so under either license.
++#
++# GPL LICENSE SUMMARY
++#
++# Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++#
++# This program is free software; you can redistribute it and/or modify
++# it under the terms of version 2 of the GNU General Public License as
++# published by the Free Software Foundation.
++#
++# This program is distributed in the hope that it will be useful, but
++# WITHOUT ANY WARRANTY; without even the implied warranty of
++# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++# General Public License for more details.
++#
++# You should have received a copy of the GNU General Public License
++# along with this program; if not, write to the Free Software
++# Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
++# The full GNU General Public License is included in this distribution
++# in the file called LICENSE.GPL.
++#
++# Contact Information:
++# Intel Corporation
++#
++# BSD LICENSE
++#
++# Copyright(c) 2007,2008 Intel Corporation. All rights reserved.
++# All rights reserved.
++#
++# Redistribution and use in source and binary forms, with or without
++# modification, are permitted provided that the following conditions
++# are met:
++#
++# * Redistributions of source code must retain the above copyright
++# notice, this list of conditions and the following disclaimer.
++# * Redistributions in binary form must reproduce the above copyright
++# notice, this list of conditions and the following disclaimer in
++# the documentation and/or other materials provided with the
++# distribution.
++# * Neither the name of Intel Corporation nor the names of its
++# contributors may be used to endorse or promote products derived
++# from this software without specific prior written permission.
++#
++# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
++# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
++# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
++# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
++# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
++# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++#
++#
++# version: Security.L.1.0.130
++############################################################################
++
++
++####################Common variables and definitions########################
++
++# Ensure The ENV_DIR environmental var is defined.
++ifndef ICP_ENV_DIR
++$(error ICP_ENV_DIR is undefined. Please set the path to your environment makefile \
++ "-> setenv ICP_ENV_DIR <path>")
++endif
++
++#Add your project environment Makefile
++include $(ICP_ENV_DIR)/environment.mk
++
++#include the makefile with all the default and common Make variable definitions
++include $(ICP_BUILDSYSTEM_PATH)/build_files/common.mk
++
++#Add the name for the executable, Library or Module output definitions
++OUTPUT_NAME= icp_ocf
++
++# List of Source Files to be compiled
++SOURCES= icp_common.c icp_sym.c icp_asym.c
++
++#common includes between all supported OSes
++INCLUDES= -I $(ICP_API_DIR) -I$(ICP_LAC_API) \
++-I$(ICP_OCF_SRC_DIR)
++
++# The location of the os level makefile needs to be changed.
++include $(ICP_ENV_DIR)/$(ICP_OS)_$(ICP_OS_LEVEL).mk
++
++# On the line directly below list the outputs you wish to build for,
++# e.g "lib_static lib_shared exe module" as show below
++install: module
++
++###################Include rules makefiles########################
++include $(ICP_BUILDSYSTEM_PATH)/build_files/rules.mk
++###################End of Rules inclusion#########################
++
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifn7751.c linux-2.6.30/crypto/ocf/hifn/hifn7751.c
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifn7751.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifn7751.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,2970 @@
++/* $OpenBSD: hifn7751.c,v 1.120 2002/05/17 00:33:34 deraadt Exp $ */
++
++/*-
++ * Invertex AEON / Hifn 7751 driver
++ * Copyright (c) 1999 Invertex Inc. All rights reserved.
++ * Copyright (c) 1999 Theo de Raadt
++ * Copyright (c) 2000-2001 Network Security Technologies, Inc.
++ * http://www.netsec.net
++ * Copyright (c) 2003 Hifn Inc.
++ *
++ * This driver is based on a previous driver by Invertex, for which they
++ * requested: Please send any comments, feedback, bug-fixes, or feature
++ * requests to software@invertex.com.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored in part by the Defense Advanced Research Projects
++ * Agency (DARPA) and Air Force Research Laboratory, Air Force
++ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
++ *
++ *
++__FBSDID("$FreeBSD: src/sys/dev/hifn/hifn7751.c,v 1.40 2007/03/21 03:42:49 sam Exp $");
++ */
++
++/*
++ * Driver for various Hifn encryption processors.
++ */
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/random.h>
++#include <linux/version.h>
++#include <linux/skbuff.h>
++#include <asm/io.h>
++
++#include <cryptodev.h>
++#include <uio.h>
++#include <hifn/hifn7751reg.h>
++#include <hifn/hifn7751var.h>
++
++#if 1
++#define DPRINTF(a...) if (hifn_debug) { \
++ printk("%s: ", sc ? \
++ device_get_nameunit(sc->sc_dev) : "hifn"); \
++ printk(a); \
++ } else
++#else
++#define DPRINTF(a...)
++#endif
++
++static inline int
++pci_get_revid(struct pci_dev *dev)
++{
++ u8 rid = 0;
++ pci_read_config_byte(dev, PCI_REVISION_ID, &rid);
++ return rid;
++}
++
++static struct hifn_stats hifnstats;
++
++#define debug hifn_debug
++int hifn_debug = 0;
++module_param(hifn_debug, int, 0644);
++MODULE_PARM_DESC(hifn_debug, "Enable debug");
++
++int hifn_maxbatch = 1;
++module_param(hifn_maxbatch, int, 0644);
++MODULE_PARM_DESC(hifn_maxbatch, "max ops to batch w/o interrupt");
++
++#ifdef MODULE_PARM
++char *hifn_pllconfig = NULL;
++MODULE_PARM(hifn_pllconfig, "s");
++#else
++char hifn_pllconfig[32]; /* This setting is RO after loading */
++module_param_string(hifn_pllconfig, hifn_pllconfig, 32, 0444);
++#endif
++MODULE_PARM_DESC(hifn_pllconfig, "PLL config, ie., pci66, ext33, ...");
++
++#ifdef HIFN_VULCANDEV
++#include <sys/conf.h>
++#include <sys/uio.h>
++
++static struct cdevsw vulcanpk_cdevsw; /* forward declaration */
++#endif
++
++/*
++ * Prototypes and count for the pci_device structure
++ */
++static int hifn_probe(struct pci_dev *dev, const struct pci_device_id *ent);
++static void hifn_remove(struct pci_dev *dev);
++
++static int hifn_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int hifn_freesession(device_t, u_int64_t);
++static int hifn_process(device_t, struct cryptop *, int);
++
++static device_method_t hifn_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, hifn_newsession),
++ DEVMETHOD(cryptodev_freesession,hifn_freesession),
++ DEVMETHOD(cryptodev_process, hifn_process),
++};
++
++static void hifn_reset_board(struct hifn_softc *, int);
++static void hifn_reset_puc(struct hifn_softc *);
++static void hifn_puc_wait(struct hifn_softc *);
++static int hifn_enable_crypto(struct hifn_softc *);
++static void hifn_set_retry(struct hifn_softc *sc);
++static void hifn_init_dma(struct hifn_softc *);
++static void hifn_init_pci_registers(struct hifn_softc *);
++static int hifn_sramsize(struct hifn_softc *);
++static int hifn_dramsize(struct hifn_softc *);
++static int hifn_ramtype(struct hifn_softc *);
++static void hifn_sessions(struct hifn_softc *);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++static irqreturn_t hifn_intr(int irq, void *arg);
++#else
++static irqreturn_t hifn_intr(int irq, void *arg, struct pt_regs *regs);
++#endif
++static u_int hifn_write_command(struct hifn_command *, u_int8_t *);
++static u_int32_t hifn_next_signature(u_int32_t a, u_int cnt);
++static void hifn_callback(struct hifn_softc *, struct hifn_command *, u_int8_t *);
++static int hifn_crypto(struct hifn_softc *, struct hifn_command *, struct cryptop *, int);
++static int hifn_readramaddr(struct hifn_softc *, int, u_int8_t *);
++static int hifn_writeramaddr(struct hifn_softc *, int, u_int8_t *);
++static int hifn_dmamap_load_src(struct hifn_softc *, struct hifn_command *);
++static int hifn_dmamap_load_dst(struct hifn_softc *, struct hifn_command *);
++static int hifn_init_pubrng(struct hifn_softc *);
++static void hifn_tick(unsigned long arg);
++static void hifn_abort(struct hifn_softc *);
++static void hifn_alloc_slot(struct hifn_softc *, int *, int *, int *, int *);
++
++static void hifn_write_reg_0(struct hifn_softc *, bus_size_t, u_int32_t);
++static void hifn_write_reg_1(struct hifn_softc *, bus_size_t, u_int32_t);
++
++#ifdef CONFIG_OCF_RANDOMHARVEST
++static int hifn_read_random(void *arg, u_int32_t *buf, int len);
++#endif
++
++#define HIFN_MAX_CHIPS 8
++static struct hifn_softc *hifn_chip_idx[HIFN_MAX_CHIPS];
++
++static __inline u_int32_t
++READ_REG_0(struct hifn_softc *sc, bus_size_t reg)
++{
++ u_int32_t v = readl(sc->sc_bar0 + reg);
++ sc->sc_bar0_lastreg = (bus_size_t) -1;
++ return (v);
++}
++#define WRITE_REG_0(sc, reg, val) hifn_write_reg_0(sc, reg, val)
++
++static __inline u_int32_t
++READ_REG_1(struct hifn_softc *sc, bus_size_t reg)
++{
++ u_int32_t v = readl(sc->sc_bar1 + reg);
++ sc->sc_bar1_lastreg = (bus_size_t) -1;
++ return (v);
++}
++#define WRITE_REG_1(sc, reg, val) hifn_write_reg_1(sc, reg, val)
++
++/*
++ * map in a given buffer (great on some arches :-)
++ */
++
++static int
++pci_map_uio(struct hifn_softc *sc, struct hifn_operand *buf, struct uio *uio)
++{
++ struct iovec *iov = uio->uio_iov;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ buf->mapsize = 0;
++ for (buf->nsegs = 0; buf->nsegs < uio->uio_iovcnt; ) {
++ buf->segs[buf->nsegs].ds_addr = pci_map_single(sc->sc_pcidev,
++ iov->iov_base, iov->iov_len,
++ PCI_DMA_BIDIRECTIONAL);
++ buf->segs[buf->nsegs].ds_len = iov->iov_len;
++ buf->mapsize += iov->iov_len;
++ iov++;
++ buf->nsegs++;
++ }
++ /* identify this buffer by the first segment */
++ buf->map = (void *) buf->segs[0].ds_addr;
++ return(0);
++}
++
++/*
++ * map in a given sk_buff
++ */
++
++static int
++pci_map_skb(struct hifn_softc *sc,struct hifn_operand *buf,struct sk_buff *skb)
++{
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ buf->mapsize = 0;
++
++ buf->segs[0].ds_addr = pci_map_single(sc->sc_pcidev,
++ skb->data, skb_headlen(skb), PCI_DMA_BIDIRECTIONAL);
++ buf->segs[0].ds_len = skb_headlen(skb);
++ buf->mapsize += buf->segs[0].ds_len;
++
++ buf->nsegs = 1;
++
++ for (i = 0; i < skb_shinfo(skb)->nr_frags; ) {
++ buf->segs[buf->nsegs].ds_len = skb_shinfo(skb)->frags[i].size;
++ buf->segs[buf->nsegs].ds_addr = pci_map_single(sc->sc_pcidev,
++ page_address(skb_shinfo(skb)->frags[i].page) +
++ skb_shinfo(skb)->frags[i].page_offset,
++ buf->segs[buf->nsegs].ds_len, PCI_DMA_BIDIRECTIONAL);
++ buf->mapsize += buf->segs[buf->nsegs].ds_len;
++ buf->nsegs++;
++ }
++
++ /* identify this buffer by the first segment */
++ buf->map = (void *) buf->segs[0].ds_addr;
++ return(0);
++}
++
++/*
++ * map in a given contiguous buffer
++ */
++
++static int
++pci_map_buf(struct hifn_softc *sc,struct hifn_operand *buf, void *b, int len)
++{
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ buf->mapsize = 0;
++ buf->segs[0].ds_addr = pci_map_single(sc->sc_pcidev,
++ b, len, PCI_DMA_BIDIRECTIONAL);
++ buf->segs[0].ds_len = len;
++ buf->mapsize += buf->segs[0].ds_len;
++ buf->nsegs = 1;
++
++ /* identify this buffer by the first segment */
++ buf->map = (void *) buf->segs[0].ds_addr;
++ return(0);
++}
++
++#if 0 /* not needed at this time */
++static void
++pci_sync_iov(struct hifn_softc *sc, struct hifn_operand *buf)
++{
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ for (i = 0; i < buf->nsegs; i++)
++ pci_dma_sync_single_for_cpu(sc->sc_pcidev, buf->segs[i].ds_addr,
++ buf->segs[i].ds_len, PCI_DMA_BIDIRECTIONAL);
++}
++#endif
++
++static void
++pci_unmap_buf(struct hifn_softc *sc, struct hifn_operand *buf)
++{
++ int i;
++ DPRINTF("%s()\n", __FUNCTION__);
++ for (i = 0; i < buf->nsegs; i++) {
++ pci_unmap_single(sc->sc_pcidev, buf->segs[i].ds_addr,
++ buf->segs[i].ds_len, PCI_DMA_BIDIRECTIONAL);
++ buf->segs[i].ds_addr = 0;
++ buf->segs[i].ds_len = 0;
++ }
++ buf->nsegs = 0;
++ buf->mapsize = 0;
++ buf->map = 0;
++}
++
++static const char*
++hifn_partname(struct hifn_softc *sc)
++{
++ /* XXX sprintf numbers when not decoded */
++ switch (pci_get_vendor(sc->sc_pcidev)) {
++ case PCI_VENDOR_HIFN:
++ switch (pci_get_device(sc->sc_pcidev)) {
++ case PCI_PRODUCT_HIFN_6500: return "Hifn 6500";
++ case PCI_PRODUCT_HIFN_7751: return "Hifn 7751";
++ case PCI_PRODUCT_HIFN_7811: return "Hifn 7811";
++ case PCI_PRODUCT_HIFN_7951: return "Hifn 7951";
++ case PCI_PRODUCT_HIFN_7955: return "Hifn 7955";
++ case PCI_PRODUCT_HIFN_7956: return "Hifn 7956";
++ }
++ return "Hifn unknown-part";
++ case PCI_VENDOR_INVERTEX:
++ switch (pci_get_device(sc->sc_pcidev)) {
++ case PCI_PRODUCT_INVERTEX_AEON: return "Invertex AEON";
++ }
++ return "Invertex unknown-part";
++ case PCI_VENDOR_NETSEC:
++ switch (pci_get_device(sc->sc_pcidev)) {
++ case PCI_PRODUCT_NETSEC_7751: return "NetSec 7751";
++ }
++ return "NetSec unknown-part";
++ }
++ return "Unknown-vendor unknown-part";
++}
++
++static u_int
++checkmaxmin(struct pci_dev *dev, const char *what, u_int v, u_int min, u_int max)
++{
++ struct hifn_softc *sc = pci_get_drvdata(dev);
++ if (v > max) {
++ device_printf(sc->sc_dev, "Warning, %s %u out of range, "
++ "using max %u\n", what, v, max);
++ v = max;
++ } else if (v < min) {
++ device_printf(sc->sc_dev, "Warning, %s %u out of range, "
++ "using min %u\n", what, v, min);
++ v = min;
++ }
++ return v;
++}
++
++/*
++ * Select PLL configuration for 795x parts. This is complicated in
++ * that we cannot determine the optimal parameters without user input.
++ * The reference clock is derived from an external clock through a
++ * multiplier. The external clock is either the host bus (i.e. PCI)
++ * or an external clock generator. When using the PCI bus we assume
++ * the clock is either 33 or 66 MHz; for an external source we cannot
++ * tell the speed.
++ *
++ * PLL configuration is done with a string: "pci" for PCI bus, or "ext"
++ * for an external source, followed by the frequency. We calculate
++ * the appropriate multiplier and PLL register contents accordingly.
++ * When no configuration is given we default to "pci66" since that
++ * always will allow the card to work. If a card is using the PCI
++ * bus clock and in a 33MHz slot then it will be operating at half
++ * speed until the correct information is provided.
++ *
++ * We use a default setting of "ext66" because according to Mike Ham
++ * of HiFn, almost every board in existence has an external crystal
++ * populated at 66Mhz. Using PCI can be a problem on modern motherboards,
++ * because PCI33 can have clocks from 0 to 33Mhz, and some have
++ * non-PCI-compliant spread-spectrum clocks, which can confuse the pll.
++ */
++static void
++hifn_getpllconfig(struct pci_dev *dev, u_int *pll)
++{
++ const char *pllspec = hifn_pllconfig;
++ u_int freq, mul, fl, fh;
++ u_int32_t pllconfig;
++ char *nxt;
++
++ if (pllspec == NULL)
++ pllspec = "ext66";
++ fl = 33, fh = 66;
++ pllconfig = 0;
++ if (strncmp(pllspec, "ext", 3) == 0) {
++ pllspec += 3;
++ pllconfig |= HIFN_PLL_REF_SEL;
++ switch (pci_get_device(dev)) {
++ case PCI_PRODUCT_HIFN_7955:
++ case PCI_PRODUCT_HIFN_7956:
++ fl = 20, fh = 100;
++ break;
++#ifdef notyet
++ case PCI_PRODUCT_HIFN_7954:
++ fl = 20, fh = 66;
++ break;
++#endif
++ }
++ } else if (strncmp(pllspec, "pci", 3) == 0)
++ pllspec += 3;
++ freq = strtoul(pllspec, &nxt, 10);
++ if (nxt == pllspec)
++ freq = 66;
++ else
++ freq = checkmaxmin(dev, "frequency", freq, fl, fh);
++ /*
++ * Calculate multiplier. We target a Fck of 266 MHz,
++ * allowing only even values, possibly rounded down.
++ * Multipliers > 8 must set the charge pump current.
++ */
++ mul = checkmaxmin(dev, "PLL divisor", (266 / freq) &~ 1, 2, 12);
++ pllconfig |= (mul / 2 - 1) << HIFN_PLL_ND_SHIFT;
++ if (mul > 8)
++ pllconfig |= HIFN_PLL_IS;
++ *pll = pllconfig;
++}
++
++/*
++ * Attach an interface that successfully probed.
++ */
++static int
++hifn_probe(struct pci_dev *dev, const struct pci_device_id *ent)
++{
++ struct hifn_softc *sc = NULL;
++ char rbase;
++ u_int16_t ena, rev;
++ int rseg, rc;
++ unsigned long mem_start, mem_len;
++ static int num_chips = 0;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (pci_enable_device(dev) < 0)
++ return(-ENODEV);
++
++ if (pci_set_mwi(dev))
++ return(-ENODEV);
++
++ if (!dev->irq) {
++ printk("hifn: found device with no IRQ assigned. check BIOS settings!");
++ pci_disable_device(dev);
++ return(-ENODEV);
++ }
++
++ sc = (struct hifn_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
++ if (!sc)
++ return(-ENOMEM);
++ memset(sc, 0, sizeof(*sc));
++
++ softc_device_init(sc, "hifn", num_chips, hifn_methods);
++
++ sc->sc_pcidev = dev;
++ sc->sc_irq = -1;
++ sc->sc_cid = -1;
++ sc->sc_num = num_chips++;
++ if (sc->sc_num < HIFN_MAX_CHIPS)
++ hifn_chip_idx[sc->sc_num] = sc;
++
++ pci_set_drvdata(sc->sc_pcidev, sc);
++
++ spin_lock_init(&sc->sc_mtx);
++
++ /* XXX handle power management */
++
++ /*
++ * The 7951 and 795x have a random number generator and
++ * public key support; note this.
++ */
++ if (pci_get_vendor(dev) == PCI_VENDOR_HIFN &&
++ (pci_get_device(dev) == PCI_PRODUCT_HIFN_7951 ||
++ pci_get_device(dev) == PCI_PRODUCT_HIFN_7955 ||
++ pci_get_device(dev) == PCI_PRODUCT_HIFN_7956))
++ sc->sc_flags = HIFN_HAS_RNG | HIFN_HAS_PUBLIC;
++ /*
++ * The 7811 has a random number generator and
++ * we also note it's identity 'cuz of some quirks.
++ */
++ if (pci_get_vendor(dev) == PCI_VENDOR_HIFN &&
++ pci_get_device(dev) == PCI_PRODUCT_HIFN_7811)
++ sc->sc_flags |= HIFN_IS_7811 | HIFN_HAS_RNG;
++
++ /*
++ * The 795x parts support AES.
++ */
++ if (pci_get_vendor(dev) == PCI_VENDOR_HIFN &&
++ (pci_get_device(dev) == PCI_PRODUCT_HIFN_7955 ||
++ pci_get_device(dev) == PCI_PRODUCT_HIFN_7956)) {
++ sc->sc_flags |= HIFN_IS_7956 | HIFN_HAS_AES;
++ /*
++ * Select PLL configuration. This depends on the
++ * bus and board design and must be manually configured
++ * if the default setting is unacceptable.
++ */
++ hifn_getpllconfig(dev, &sc->sc_pllconfig);
++ }
++
++ /*
++ * Setup PCI resources. Note that we record the bus
++ * tag and handle for each register mapping, this is
++ * used by the READ_REG_0, WRITE_REG_0, READ_REG_1,
++ * and WRITE_REG_1 macros throughout the driver.
++ */
++ mem_start = pci_resource_start(sc->sc_pcidev, 0);
++ mem_len = pci_resource_len(sc->sc_pcidev, 0);
++ sc->sc_bar0 = (ocf_iomem_t) ioremap(mem_start, mem_len);
++ if (!sc->sc_bar0) {
++ device_printf(sc->sc_dev, "cannot map bar%d register space\n", 0);
++ goto fail;
++ }
++ sc->sc_bar0_lastreg = (bus_size_t) -1;
++
++ mem_start = pci_resource_start(sc->sc_pcidev, 1);
++ mem_len = pci_resource_len(sc->sc_pcidev, 1);
++ sc->sc_bar1 = (ocf_iomem_t) ioremap(mem_start, mem_len);
++ if (!sc->sc_bar1) {
++ device_printf(sc->sc_dev, "cannot map bar%d register space\n", 1);
++ goto fail;
++ }
++ sc->sc_bar1_lastreg = (bus_size_t) -1;
++
++ /* fix up the bus size */
++ if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
++ device_printf(sc->sc_dev, "No usable DMA configuration, aborting.\n");
++ goto fail;
++ }
++ if (pci_set_consistent_dma_mask(dev, DMA_32BIT_MASK)) {
++ device_printf(sc->sc_dev,
++ "No usable consistent DMA configuration, aborting.\n");
++ goto fail;
++ }
++
++ hifn_set_retry(sc);
++
++ /*
++ * Setup the area where the Hifn DMA's descriptors
++ * and associated data structures.
++ */
++ sc->sc_dma = (struct hifn_dma *) pci_alloc_consistent(dev,
++ sizeof(*sc->sc_dma),
++ &sc->sc_dma_physaddr);
++ if (!sc->sc_dma) {
++ device_printf(sc->sc_dev, "cannot alloc sc_dma\n");
++ goto fail;
++ }
++ bzero(sc->sc_dma, sizeof(*sc->sc_dma));
++
++ /*
++ * Reset the board and do the ``secret handshake''
++ * to enable the crypto support. Then complete the
++ * initialization procedure by setting up the interrupt
++ * and hooking in to the system crypto support so we'll
++ * get used for system services like the crypto device,
++ * IPsec, RNG device, etc.
++ */
++ hifn_reset_board(sc, 0);
++
++ if (hifn_enable_crypto(sc) != 0) {
++ device_printf(sc->sc_dev, "crypto enabling failed\n");
++ goto fail;
++ }
++ hifn_reset_puc(sc);
++
++ hifn_init_dma(sc);
++ hifn_init_pci_registers(sc);
++
++ pci_set_master(sc->sc_pcidev);
++
++ /* XXX can't dynamically determine ram type for 795x; force dram */
++ if (sc->sc_flags & HIFN_IS_7956)
++ sc->sc_drammodel = 1;
++ else if (hifn_ramtype(sc))
++ goto fail;
++
++ if (sc->sc_drammodel == 0)
++ hifn_sramsize(sc);
++ else
++ hifn_dramsize(sc);
++
++ /*
++ * Workaround for NetSec 7751 rev A: half ram size because two
++ * of the address lines were left floating
++ */
++ if (pci_get_vendor(dev) == PCI_VENDOR_NETSEC &&
++ pci_get_device(dev) == PCI_PRODUCT_NETSEC_7751 &&
++ pci_get_revid(dev) == 0x61) /*XXX???*/
++ sc->sc_ramsize >>= 1;
++
++ /*
++ * Arrange the interrupt line.
++ */
++ rc = request_irq(dev->irq, hifn_intr, IRQF_SHARED, "hifn", sc);
++ if (rc) {
++ device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc);
++ goto fail;
++ }
++ sc->sc_irq = dev->irq;
++
++ hifn_sessions(sc);
++
++ /*
++ * NB: Keep only the low 16 bits; this masks the chip id
++ * from the 7951.
++ */
++ rev = READ_REG_1(sc, HIFN_1_REVID) & 0xffff;
++
++ rseg = sc->sc_ramsize / 1024;
++ rbase = 'K';
++ if (sc->sc_ramsize >= (1024 * 1024)) {
++ rbase = 'M';
++ rseg /= 1024;
++ }
++ device_printf(sc->sc_dev, "%s, rev %u, %d%cB %cram",
++ hifn_partname(sc), rev,
++ rseg, rbase, sc->sc_drammodel ? 'd' : 's');
++ if (sc->sc_flags & HIFN_IS_7956)
++ printf(", pll=0x%x<%s clk, %ux mult>",
++ sc->sc_pllconfig,
++ sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci",
++ 2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11));
++ printf("\n");
++
++ sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
++ if (sc->sc_cid < 0) {
++ device_printf(sc->sc_dev, "could not get crypto driver id\n");
++ goto fail;
++ }
++
++ WRITE_REG_0(sc, HIFN_0_PUCNFG,
++ READ_REG_0(sc, HIFN_0_PUCNFG) | HIFN_PUCNFG_CHIPID);
++ ena = READ_REG_0(sc, HIFN_0_PUSTAT) & HIFN_PUSTAT_CHIPENA;
++
++ switch (ena) {
++ case HIFN_PUSTAT_ENA_2:
++ crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_ARC4, 0, 0);
++ if (sc->sc_flags & HIFN_HAS_AES)
++ crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
++ /*FALLTHROUGH*/
++ case HIFN_PUSTAT_ENA_1:
++ crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0);
++ break;
++ }
++
++ if (sc->sc_flags & (HIFN_HAS_PUBLIC | HIFN_HAS_RNG))
++ hifn_init_pubrng(sc);
++
++ init_timer(&sc->sc_tickto);
++ sc->sc_tickto.function = hifn_tick;
++ sc->sc_tickto.data = (unsigned long) sc->sc_num;
++ mod_timer(&sc->sc_tickto, jiffies + HZ);
++
++ return (0);
++
++fail:
++ if (sc->sc_cid >= 0)
++ crypto_unregister_all(sc->sc_cid);
++ if (sc->sc_irq != -1)
++ free_irq(sc->sc_irq, sc);
++ if (sc->sc_dma) {
++ /* Turn off DMA polling */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++
++ pci_free_consistent(sc->sc_pcidev,
++ sizeof(*sc->sc_dma),
++ sc->sc_dma, sc->sc_dma_physaddr);
++ }
++ kfree(sc);
++ return (-ENXIO);
++}
++
++/*
++ * Detach an interface that successfully probed.
++ */
++static void
++hifn_remove(struct pci_dev *dev)
++{
++ struct hifn_softc *sc = pci_get_drvdata(dev);
++ unsigned long l_flags;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ KASSERT(sc != NULL, ("hifn_detach: null software carrier!"));
++
++ /* disable interrupts */
++ HIFN_LOCK(sc);
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, 0);
++ HIFN_UNLOCK(sc);
++
++ /*XXX other resources */
++ del_timer_sync(&sc->sc_tickto);
++
++ /* Turn off DMA polling */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++
++ crypto_unregister_all(sc->sc_cid);
++
++ free_irq(sc->sc_irq, sc);
++
++ pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma),
++ sc->sc_dma, sc->sc_dma_physaddr);
++}
++
++
++static int
++hifn_init_pubrng(struct hifn_softc *sc)
++{
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if ((sc->sc_flags & HIFN_IS_7811) == 0) {
++ /* Reset 7951 public key/rng engine */
++ WRITE_REG_1(sc, HIFN_1_PUB_RESET,
++ READ_REG_1(sc, HIFN_1_PUB_RESET) | HIFN_PUBRST_RESET);
++
++ for (i = 0; i < 100; i++) {
++ DELAY(1000);
++ if ((READ_REG_1(sc, HIFN_1_PUB_RESET) &
++ HIFN_PUBRST_RESET) == 0)
++ break;
++ }
++
++ if (i == 100) {
++ device_printf(sc->sc_dev, "public key init failed\n");
++ return (1);
++ }
++ }
++
++ /* Enable the rng, if available */
++#ifdef CONFIG_OCF_RANDOMHARVEST
++ if (sc->sc_flags & HIFN_HAS_RNG) {
++ if (sc->sc_flags & HIFN_IS_7811) {
++ u_int32_t r;
++ r = READ_REG_1(sc, HIFN_1_7811_RNGENA);
++ if (r & HIFN_7811_RNGENA_ENA) {
++ r &= ~HIFN_7811_RNGENA_ENA;
++ WRITE_REG_1(sc, HIFN_1_7811_RNGENA, r);
++ }
++ WRITE_REG_1(sc, HIFN_1_7811_RNGCFG,
++ HIFN_7811_RNGCFG_DEFL);
++ r |= HIFN_7811_RNGENA_ENA;
++ WRITE_REG_1(sc, HIFN_1_7811_RNGENA, r);
++ } else
++ WRITE_REG_1(sc, HIFN_1_RNG_CONFIG,
++ READ_REG_1(sc, HIFN_1_RNG_CONFIG) |
++ HIFN_RNGCFG_ENA);
++
++ sc->sc_rngfirst = 1;
++ crypto_rregister(sc->sc_cid, hifn_read_random, sc);
++ }
++#endif
++
++ /* Enable public key engine, if available */
++ if (sc->sc_flags & HIFN_HAS_PUBLIC) {
++ WRITE_REG_1(sc, HIFN_1_PUB_IEN, HIFN_PUBIEN_DONE);
++ sc->sc_dmaier |= HIFN_DMAIER_PUBDONE;
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, sc->sc_dmaier);
++#ifdef HIFN_VULCANDEV
++ sc->sc_pkdev = make_dev(&vulcanpk_cdevsw, 0,
++ UID_ROOT, GID_WHEEL, 0666,
++ "vulcanpk");
++ sc->sc_pkdev->si_drv1 = sc;
++#endif
++ }
++
++ return (0);
++}
++
++#ifdef CONFIG_OCF_RANDOMHARVEST
++static int
++hifn_read_random(void *arg, u_int32_t *buf, int len)
++{
++ struct hifn_softc *sc = (struct hifn_softc *) arg;
++ u_int32_t sts;
++ int i, rc = 0;
++
++ if (len <= 0)
++ return rc;
++
++ if (sc->sc_flags & HIFN_IS_7811) {
++ /* ONLY VALID ON 7811!!!! */
++ for (i = 0; i < 5; i++) {
++ sts = READ_REG_1(sc, HIFN_1_7811_RNGSTS);
++ if (sts & HIFN_7811_RNGSTS_UFL) {
++ device_printf(sc->sc_dev,
++ "RNG underflow: disabling\n");
++ /* DAVIDM perhaps return -1 */
++ break;
++ }
++ if ((sts & HIFN_7811_RNGSTS_RDY) == 0)
++ break;
++
++ /*
++ * There are at least two words in the RNG FIFO
++ * at this point.
++ */
++ if (rc < len)
++ buf[rc++] = READ_REG_1(sc, HIFN_1_7811_RNGDAT);
++ if (rc < len)
++ buf[rc++] = READ_REG_1(sc, HIFN_1_7811_RNGDAT);
++ }
++ } else
++ buf[rc++] = READ_REG_1(sc, HIFN_1_RNG_DATA);
++
++ /* NB: discard first data read */
++ if (sc->sc_rngfirst) {
++ sc->sc_rngfirst = 0;
++ rc = 0;
++ }
++
++ return(rc);
++}
++#endif /* CONFIG_OCF_RANDOMHARVEST */
++
++static void
++hifn_puc_wait(struct hifn_softc *sc)
++{
++ int i;
++ int reg = HIFN_0_PUCTRL;
++
++ if (sc->sc_flags & HIFN_IS_7956) {
++ reg = HIFN_0_PUCTRL2;
++ }
++
++ for (i = 5000; i > 0; i--) {
++ DELAY(1);
++ if (!(READ_REG_0(sc, reg) & HIFN_PUCTRL_RESET))
++ break;
++ }
++ if (!i)
++ device_printf(sc->sc_dev, "proc unit did not reset(0x%x)\n",
++ READ_REG_0(sc, HIFN_0_PUCTRL));
++}
++
++/*
++ * Reset the processing unit.
++ */
++static void
++hifn_reset_puc(struct hifn_softc *sc)
++{
++ /* Reset processing unit */
++ int reg = HIFN_0_PUCTRL;
++
++ if (sc->sc_flags & HIFN_IS_7956) {
++ reg = HIFN_0_PUCTRL2;
++ }
++ WRITE_REG_0(sc, reg, HIFN_PUCTRL_DMAENA);
++
++ hifn_puc_wait(sc);
++}
++
++/*
++ * Set the Retry and TRDY registers; note that we set them to
++ * zero because the 7811 locks up when forced to retry (section
++ * 3.6 of "Specification Update SU-0014-04". Not clear if we
++ * should do this for all Hifn parts, but it doesn't seem to hurt.
++ */
++static void
++hifn_set_retry(struct hifn_softc *sc)
++{
++ DPRINTF("%s()\n", __FUNCTION__);
++ /* NB: RETRY only responds to 8-bit reads/writes */
++ pci_write_config_byte(sc->sc_pcidev, HIFN_RETRY_TIMEOUT, 0);
++ pci_write_config_dword(sc->sc_pcidev, HIFN_TRDY_TIMEOUT, 0);
++}
++
++/*
++ * Resets the board. Values in the regesters are left as is
++ * from the reset (i.e. initial values are assigned elsewhere).
++ */
++static void
++hifn_reset_board(struct hifn_softc *sc, int full)
++{
++ u_int32_t reg;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ /*
++ * Set polling in the DMA configuration register to zero. 0x7 avoids
++ * resetting the board and zeros out the other fields.
++ */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++
++ /*
++ * Now that polling has been disabled, we have to wait 1 ms
++ * before resetting the board.
++ */
++ DELAY(1000);
++
++ /* Reset the DMA unit */
++ if (full) {
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MODE);
++ DELAY(1000);
++ } else {
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG,
++ HIFN_DMACNFG_MODE | HIFN_DMACNFG_MSTRESET);
++ hifn_reset_puc(sc);
++ }
++
++ KASSERT(sc->sc_dma != NULL, ("hifn_reset_board: null DMA tag!"));
++ bzero(sc->sc_dma, sizeof(*sc->sc_dma));
++
++ /* Bring dma unit out of reset */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++
++ hifn_puc_wait(sc);
++ hifn_set_retry(sc);
++
++ if (sc->sc_flags & HIFN_IS_7811) {
++ for (reg = 0; reg < 1000; reg++) {
++ if (READ_REG_1(sc, HIFN_1_7811_MIPSRST) &
++ HIFN_MIPSRST_CRAMINIT)
++ break;
++ DELAY(1000);
++ }
++ if (reg == 1000)
++ device_printf(sc->sc_dev, ": cram init timeout\n");
++ } else {
++ /* set up DMA configuration register #2 */
++ /* turn off all PK and BAR0 swaps */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG2,
++ (3 << HIFN_DMACNFG2_INIT_WRITE_BURST_SHIFT)|
++ (3 << HIFN_DMACNFG2_INIT_READ_BURST_SHIFT)|
++ (2 << HIFN_DMACNFG2_TGT_WRITE_BURST_SHIFT)|
++ (2 << HIFN_DMACNFG2_TGT_READ_BURST_SHIFT));
++ }
++}
++
++static u_int32_t
++hifn_next_signature(u_int32_t a, u_int cnt)
++{
++ int i;
++ u_int32_t v;
++
++ for (i = 0; i < cnt; i++) {
++
++ /* get the parity */
++ v = a & 0x80080125;
++ v ^= v >> 16;
++ v ^= v >> 8;
++ v ^= v >> 4;
++ v ^= v >> 2;
++ v ^= v >> 1;
++
++ a = (v & 1) ^ (a << 1);
++ }
++
++ return a;
++}
++
++
++/*
++ * Checks to see if crypto is already enabled. If crypto isn't enable,
++ * "hifn_enable_crypto" is called to enable it. The check is important,
++ * as enabling crypto twice will lock the board.
++ */
++static int
++hifn_enable_crypto(struct hifn_softc *sc)
++{
++ u_int32_t dmacfg, ramcfg, encl, addr, i;
++ char offtbl[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
++ 0x00, 0x00, 0x00, 0x00 };
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ ramcfg = READ_REG_0(sc, HIFN_0_PUCNFG);
++ dmacfg = READ_REG_1(sc, HIFN_1_DMA_CNFG);
++
++ /*
++ * The RAM config register's encrypt level bit needs to be set before
++ * every read performed on the encryption level register.
++ */
++ WRITE_REG_0(sc, HIFN_0_PUCNFG, ramcfg | HIFN_PUCNFG_CHIPID);
++
++ encl = READ_REG_0(sc, HIFN_0_PUSTAT) & HIFN_PUSTAT_CHIPENA;
++
++ /*
++ * Make sure we don't re-unlock. Two unlocks kills chip until the
++ * next reboot.
++ */
++ if (encl == HIFN_PUSTAT_ENA_1 || encl == HIFN_PUSTAT_ENA_2) {
++#ifdef HIFN_DEBUG
++ if (hifn_debug)
++ device_printf(sc->sc_dev,
++ "Strong crypto already enabled!\n");
++#endif
++ goto report;
++ }
++
++ if (encl != 0 && encl != HIFN_PUSTAT_ENA_0) {
++#ifdef HIFN_DEBUG
++ if (hifn_debug)
++ device_printf(sc->sc_dev,
++ "Unknown encryption level 0x%x\n", encl);
++#endif
++ return 1;
++ }
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_UNLOCK |
++ HIFN_DMACNFG_MSTRESET | HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++ DELAY(1000);
++ addr = READ_REG_1(sc, HIFN_UNLOCK_SECRET1);
++ DELAY(1000);
++ WRITE_REG_1(sc, HIFN_UNLOCK_SECRET2, 0);
++ DELAY(1000);
++
++ for (i = 0; i <= 12; i++) {
++ addr = hifn_next_signature(addr, offtbl[i] + 0x101);
++ WRITE_REG_1(sc, HIFN_UNLOCK_SECRET2, addr);
++
++ DELAY(1000);
++ }
++
++ WRITE_REG_0(sc, HIFN_0_PUCNFG, ramcfg | HIFN_PUCNFG_CHIPID);
++ encl = READ_REG_0(sc, HIFN_0_PUSTAT) & HIFN_PUSTAT_CHIPENA;
++
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ if (encl != HIFN_PUSTAT_ENA_1 && encl != HIFN_PUSTAT_ENA_2)
++ device_printf(sc->sc_dev, "Engine is permanently "
++ "locked until next system reset!\n");
++ else
++ device_printf(sc->sc_dev, "Engine enabled "
++ "successfully!\n");
++ }
++#endif
++
++report:
++ WRITE_REG_0(sc, HIFN_0_PUCNFG, ramcfg);
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, dmacfg);
++
++ switch (encl) {
++ case HIFN_PUSTAT_ENA_1:
++ case HIFN_PUSTAT_ENA_2:
++ break;
++ case HIFN_PUSTAT_ENA_0:
++ default:
++ device_printf(sc->sc_dev, "disabled\n");
++ break;
++ }
++
++ return 0;
++}
++
++/*
++ * Give initial values to the registers listed in the "Register Space"
++ * section of the HIFN Software Development reference manual.
++ */
++static void
++hifn_init_pci_registers(struct hifn_softc *sc)
++{
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /* write fixed values needed by the Initialization registers */
++ WRITE_REG_0(sc, HIFN_0_PUCTRL, HIFN_PUCTRL_DMAENA);
++ WRITE_REG_0(sc, HIFN_0_FIFOCNFG, HIFN_FIFOCNFG_THRESHOLD);
++ WRITE_REG_0(sc, HIFN_0_PUIER, HIFN_PUIER_DSTOVER);
++
++ /* write all 4 ring address registers */
++ WRITE_REG_1(sc, HIFN_1_DMA_CRAR, sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, cmdr[0]));
++ WRITE_REG_1(sc, HIFN_1_DMA_SRAR, sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, srcr[0]));
++ WRITE_REG_1(sc, HIFN_1_DMA_DRAR, sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, dstr[0]));
++ WRITE_REG_1(sc, HIFN_1_DMA_RRAR, sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, resr[0]));
++
++ DELAY(2000);
++
++ /* write status register */
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR,
++ HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS |
++ HIFN_DMACSR_S_CTRL_DIS | HIFN_DMACSR_C_CTRL_DIS |
++ HIFN_DMACSR_D_ABORT | HIFN_DMACSR_D_DONE | HIFN_DMACSR_D_LAST |
++ HIFN_DMACSR_D_WAIT | HIFN_DMACSR_D_OVER |
++ HIFN_DMACSR_R_ABORT | HIFN_DMACSR_R_DONE | HIFN_DMACSR_R_LAST |
++ HIFN_DMACSR_R_WAIT | HIFN_DMACSR_R_OVER |
++ HIFN_DMACSR_S_ABORT | HIFN_DMACSR_S_DONE | HIFN_DMACSR_S_LAST |
++ HIFN_DMACSR_S_WAIT |
++ HIFN_DMACSR_C_ABORT | HIFN_DMACSR_C_DONE | HIFN_DMACSR_C_LAST |
++ HIFN_DMACSR_C_WAIT |
++ HIFN_DMACSR_ENGINE |
++ ((sc->sc_flags & HIFN_HAS_PUBLIC) ?
++ HIFN_DMACSR_PUBDONE : 0) |
++ ((sc->sc_flags & HIFN_IS_7811) ?
++ HIFN_DMACSR_ILLW | HIFN_DMACSR_ILLR : 0));
++
++ sc->sc_d_busy = sc->sc_r_busy = sc->sc_s_busy = sc->sc_c_busy = 0;
++ sc->sc_dmaier |= HIFN_DMAIER_R_DONE | HIFN_DMAIER_C_ABORT |
++ HIFN_DMAIER_D_OVER | HIFN_DMAIER_R_OVER |
++ HIFN_DMAIER_S_ABORT | HIFN_DMAIER_D_ABORT | HIFN_DMAIER_R_ABORT |
++ ((sc->sc_flags & HIFN_IS_7811) ?
++ HIFN_DMAIER_ILLW | HIFN_DMAIER_ILLR : 0);
++ sc->sc_dmaier &= ~HIFN_DMAIER_C_WAIT;
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, sc->sc_dmaier);
++
++
++ if (sc->sc_flags & HIFN_IS_7956) {
++ u_int32_t pll;
++
++ WRITE_REG_0(sc, HIFN_0_PUCNFG, HIFN_PUCNFG_COMPSING |
++ HIFN_PUCNFG_TCALLPHASES |
++ HIFN_PUCNFG_TCDRVTOTEM | HIFN_PUCNFG_BUS32);
++
++ /* turn off the clocks and insure bypass is set */
++ pll = READ_REG_1(sc, HIFN_1_PLL);
++ pll = (pll &~ (HIFN_PLL_PK_CLK_SEL | HIFN_PLL_PE_CLK_SEL))
++ | HIFN_PLL_BP | HIFN_PLL_MBSET;
++ WRITE_REG_1(sc, HIFN_1_PLL, pll);
++ DELAY(10*1000); /* 10ms */
++
++ /* change configuration */
++ pll = (pll &~ HIFN_PLL_CONFIG) | sc->sc_pllconfig;
++ WRITE_REG_1(sc, HIFN_1_PLL, pll);
++ DELAY(10*1000); /* 10ms */
++
++ /* disable bypass */
++ pll &= ~HIFN_PLL_BP;
++ WRITE_REG_1(sc, HIFN_1_PLL, pll);
++ /* enable clocks with new configuration */
++ pll |= HIFN_PLL_PK_CLK_SEL | HIFN_PLL_PE_CLK_SEL;
++ WRITE_REG_1(sc, HIFN_1_PLL, pll);
++ } else {
++ WRITE_REG_0(sc, HIFN_0_PUCNFG, HIFN_PUCNFG_COMPSING |
++ HIFN_PUCNFG_DRFR_128 | HIFN_PUCNFG_TCALLPHASES |
++ HIFN_PUCNFG_TCDRVTOTEM | HIFN_PUCNFG_BUS32 |
++ (sc->sc_drammodel ? HIFN_PUCNFG_DRAM : HIFN_PUCNFG_SRAM));
++ }
++
++ WRITE_REG_0(sc, HIFN_0_PUISR, HIFN_PUISR_DSTOVER);
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE | HIFN_DMACNFG_LAST |
++ ((HIFN_POLL_FREQUENCY << 16 ) & HIFN_DMACNFG_POLLFREQ) |
++ ((HIFN_POLL_SCALAR << 8) & HIFN_DMACNFG_POLLINVAL));
++}
++
++/*
++ * The maximum number of sessions supported by the card
++ * is dependent on the amount of context ram, which
++ * encryption algorithms are enabled, and how compression
++ * is configured. This should be configured before this
++ * routine is called.
++ */
++static void
++hifn_sessions(struct hifn_softc *sc)
++{
++ u_int32_t pucnfg;
++ int ctxsize;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ pucnfg = READ_REG_0(sc, HIFN_0_PUCNFG);
++
++ if (pucnfg & HIFN_PUCNFG_COMPSING) {
++ if (pucnfg & HIFN_PUCNFG_ENCCNFG)
++ ctxsize = 128;
++ else
++ ctxsize = 512;
++ /*
++ * 7955/7956 has internal context memory of 32K
++ */
++ if (sc->sc_flags & HIFN_IS_7956)
++ sc->sc_maxses = 32768 / ctxsize;
++ else
++ sc->sc_maxses = 1 +
++ ((sc->sc_ramsize - 32768) / ctxsize);
++ } else
++ sc->sc_maxses = sc->sc_ramsize / 16384;
++
++ if (sc->sc_maxses > 2048)
++ sc->sc_maxses = 2048;
++}
++
++/*
++ * Determine ram type (sram or dram). Board should be just out of a reset
++ * state when this is called.
++ */
++static int
++hifn_ramtype(struct hifn_softc *sc)
++{
++ u_int8_t data[8], dataexpect[8];
++ int i;
++
++ for (i = 0; i < sizeof(data); i++)
++ data[i] = dataexpect[i] = 0x55;
++ if (hifn_writeramaddr(sc, 0, data))
++ return (-1);
++ if (hifn_readramaddr(sc, 0, data))
++ return (-1);
++ if (bcmp(data, dataexpect, sizeof(data)) != 0) {
++ sc->sc_drammodel = 1;
++ return (0);
++ }
++
++ for (i = 0; i < sizeof(data); i++)
++ data[i] = dataexpect[i] = 0xaa;
++ if (hifn_writeramaddr(sc, 0, data))
++ return (-1);
++ if (hifn_readramaddr(sc, 0, data))
++ return (-1);
++ if (bcmp(data, dataexpect, sizeof(data)) != 0) {
++ sc->sc_drammodel = 1;
++ return (0);
++ }
++
++ return (0);
++}
++
++#define HIFN_SRAM_MAX (32 << 20)
++#define HIFN_SRAM_STEP_SIZE 16384
++#define HIFN_SRAM_GRANULARITY (HIFN_SRAM_MAX / HIFN_SRAM_STEP_SIZE)
++
++static int
++hifn_sramsize(struct hifn_softc *sc)
++{
++ u_int32_t a;
++ u_int8_t data[8];
++ u_int8_t dataexpect[sizeof(data)];
++ int32_t i;
++
++ for (i = 0; i < sizeof(data); i++)
++ data[i] = dataexpect[i] = i ^ 0x5a;
++
++ for (i = HIFN_SRAM_GRANULARITY - 1; i >= 0; i--) {
++ a = i * HIFN_SRAM_STEP_SIZE;
++ bcopy(&i, data, sizeof(i));
++ hifn_writeramaddr(sc, a, data);
++ }
++
++ for (i = 0; i < HIFN_SRAM_GRANULARITY; i++) {
++ a = i * HIFN_SRAM_STEP_SIZE;
++ bcopy(&i, dataexpect, sizeof(i));
++ if (hifn_readramaddr(sc, a, data) < 0)
++ return (0);
++ if (bcmp(data, dataexpect, sizeof(data)) != 0)
++ return (0);
++ sc->sc_ramsize = a + HIFN_SRAM_STEP_SIZE;
++ }
++
++ return (0);
++}
++
++/*
++ * XXX For dram boards, one should really try all of the
++ * HIFN_PUCNFG_DSZ_*'s. This just assumes that PUCNFG
++ * is already set up correctly.
++ */
++static int
++hifn_dramsize(struct hifn_softc *sc)
++{
++ u_int32_t cnfg;
++
++ if (sc->sc_flags & HIFN_IS_7956) {
++ /*
++ * 7955/7956 have a fixed internal ram of only 32K.
++ */
++ sc->sc_ramsize = 32768;
++ } else {
++ cnfg = READ_REG_0(sc, HIFN_0_PUCNFG) &
++ HIFN_PUCNFG_DRAMMASK;
++ sc->sc_ramsize = 1 << ((cnfg >> 13) + 18);
++ }
++ return (0);
++}
++
++static void
++hifn_alloc_slot(struct hifn_softc *sc, int *cmdp, int *srcp, int *dstp, int *resp)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (dma->cmdi == HIFN_D_CMD_RSIZE) {
++ dma->cmdi = 0;
++ dma->cmdr[HIFN_D_CMD_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->cmdr[HIFN_D_CMD_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_CMDR_SYNC(sc, HIFN_D_CMD_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ }
++ *cmdp = dma->cmdi++;
++ dma->cmdk = dma->cmdi;
++
++ if (dma->srci == HIFN_D_SRC_RSIZE) {
++ dma->srci = 0;
++ dma->srcr[HIFN_D_SRC_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->srcr[HIFN_D_SRC_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_SRCR_SYNC(sc, HIFN_D_SRC_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ }
++ *srcp = dma->srci++;
++ dma->srck = dma->srci;
++
++ if (dma->dsti == HIFN_D_DST_RSIZE) {
++ dma->dsti = 0;
++ dma->dstr[HIFN_D_DST_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->dstr[HIFN_D_DST_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_DSTR_SYNC(sc, HIFN_D_DST_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ }
++ *dstp = dma->dsti++;
++ dma->dstk = dma->dsti;
++
++ if (dma->resi == HIFN_D_RES_RSIZE) {
++ dma->resi = 0;
++ dma->resr[HIFN_D_RES_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->resr[HIFN_D_RES_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_RESR_SYNC(sc, HIFN_D_RES_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ }
++ *resp = dma->resi++;
++ dma->resk = dma->resi;
++}
++
++static int
++hifn_writeramaddr(struct hifn_softc *sc, int addr, u_int8_t *data)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ hifn_base_command_t wc;
++ const u_int32_t masks = HIFN_D_VALID | HIFN_D_LAST | HIFN_D_MASKDONEIRQ;
++ int r, cmdi, resi, srci, dsti;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ wc.masks = htole16(3 << 13);
++ wc.session_num = htole16(addr >> 14);
++ wc.total_source_count = htole16(8);
++ wc.total_dest_count = htole16(addr & 0x3fff);
++
++ hifn_alloc_slot(sc, &cmdi, &srci, &dsti, &resi);
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR,
++ HIFN_DMACSR_C_CTRL_ENA | HIFN_DMACSR_S_CTRL_ENA |
++ HIFN_DMACSR_D_CTRL_ENA | HIFN_DMACSR_R_CTRL_ENA);
++
++ /* build write command */
++ bzero(dma->command_bufs[cmdi], HIFN_MAX_COMMAND);
++ *(hifn_base_command_t *)dma->command_bufs[cmdi] = wc;
++ bcopy(data, &dma->test_src, sizeof(dma->test_src));
++
++ dma->srcr[srci].p = htole32(sc->sc_dma_physaddr
++ + offsetof(struct hifn_dma, test_src));
++ dma->dstr[dsti].p = htole32(sc->sc_dma_physaddr
++ + offsetof(struct hifn_dma, test_dst));
++
++ dma->cmdr[cmdi].l = htole32(16 | masks);
++ dma->srcr[srci].l = htole32(8 | masks);
++ dma->dstr[dsti].l = htole32(4 | masks);
++ dma->resr[resi].l = htole32(4 | masks);
++
++ for (r = 10000; r >= 0; r--) {
++ DELAY(10);
++ if ((dma->resr[resi].l & htole32(HIFN_D_VALID)) == 0)
++ break;
++ }
++ if (r == 0) {
++ device_printf(sc->sc_dev, "writeramaddr -- "
++ "result[%d](addr %d) still valid\n", resi, addr);
++ r = -1;
++ return (-1);
++ } else
++ r = 0;
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR,
++ HIFN_DMACSR_C_CTRL_DIS | HIFN_DMACSR_S_CTRL_DIS |
++ HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS);
++
++ return (r);
++}
++
++static int
++hifn_readramaddr(struct hifn_softc *sc, int addr, u_int8_t *data)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ hifn_base_command_t rc;
++ const u_int32_t masks = HIFN_D_VALID | HIFN_D_LAST | HIFN_D_MASKDONEIRQ;
++ int r, cmdi, srci, dsti, resi;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ rc.masks = htole16(2 << 13);
++ rc.session_num = htole16(addr >> 14);
++ rc.total_source_count = htole16(addr & 0x3fff);
++ rc.total_dest_count = htole16(8);
++
++ hifn_alloc_slot(sc, &cmdi, &srci, &dsti, &resi);
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR,
++ HIFN_DMACSR_C_CTRL_ENA | HIFN_DMACSR_S_CTRL_ENA |
++ HIFN_DMACSR_D_CTRL_ENA | HIFN_DMACSR_R_CTRL_ENA);
++
++ bzero(dma->command_bufs[cmdi], HIFN_MAX_COMMAND);
++ *(hifn_base_command_t *)dma->command_bufs[cmdi] = rc;
++
++ dma->srcr[srci].p = htole32(sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, test_src));
++ dma->test_src = 0;
++ dma->dstr[dsti].p = htole32(sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, test_dst));
++ dma->test_dst = 0;
++ dma->cmdr[cmdi].l = htole32(8 | masks);
++ dma->srcr[srci].l = htole32(8 | masks);
++ dma->dstr[dsti].l = htole32(8 | masks);
++ dma->resr[resi].l = htole32(HIFN_MAX_RESULT | masks);
++
++ for (r = 10000; r >= 0; r--) {
++ DELAY(10);
++ if ((dma->resr[resi].l & htole32(HIFN_D_VALID)) == 0)
++ break;
++ }
++ if (r == 0) {
++ device_printf(sc->sc_dev, "readramaddr -- "
++ "result[%d](addr %d) still valid\n", resi, addr);
++ r = -1;
++ } else {
++ r = 0;
++ bcopy(&dma->test_dst, data, sizeof(dma->test_dst));
++ }
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR,
++ HIFN_DMACSR_C_CTRL_DIS | HIFN_DMACSR_S_CTRL_DIS |
++ HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS);
++
++ return (r);
++}
++
++/*
++ * Initialize the descriptor rings.
++ */
++static void
++hifn_init_dma(struct hifn_softc *sc)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ hifn_set_retry(sc);
++
++ /* initialize static pointer values */
++ for (i = 0; i < HIFN_D_CMD_RSIZE; i++)
++ dma->cmdr[i].p = htole32(sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, command_bufs[i][0]));
++ for (i = 0; i < HIFN_D_RES_RSIZE; i++)
++ dma->resr[i].p = htole32(sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, result_bufs[i][0]));
++
++ dma->cmdr[HIFN_D_CMD_RSIZE].p =
++ htole32(sc->sc_dma_physaddr + offsetof(struct hifn_dma, cmdr[0]));
++ dma->srcr[HIFN_D_SRC_RSIZE].p =
++ htole32(sc->sc_dma_physaddr + offsetof(struct hifn_dma, srcr[0]));
++ dma->dstr[HIFN_D_DST_RSIZE].p =
++ htole32(sc->sc_dma_physaddr + offsetof(struct hifn_dma, dstr[0]));
++ dma->resr[HIFN_D_RES_RSIZE].p =
++ htole32(sc->sc_dma_physaddr + offsetof(struct hifn_dma, resr[0]));
++
++ dma->cmdu = dma->srcu = dma->dstu = dma->resu = 0;
++ dma->cmdi = dma->srci = dma->dsti = dma->resi = 0;
++ dma->cmdk = dma->srck = dma->dstk = dma->resk = 0;
++}
++
++/*
++ * Writes out the raw command buffer space. Returns the
++ * command buffer size.
++ */
++static u_int
++hifn_write_command(struct hifn_command *cmd, u_int8_t *buf)
++{
++ struct hifn_softc *sc = NULL;
++ u_int8_t *buf_pos;
++ hifn_base_command_t *base_cmd;
++ hifn_mac_command_t *mac_cmd;
++ hifn_crypt_command_t *cry_cmd;
++ int using_mac, using_crypt, len, ivlen;
++ u_int32_t dlen, slen;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ buf_pos = buf;
++ using_mac = cmd->base_masks & HIFN_BASE_CMD_MAC;
++ using_crypt = cmd->base_masks & HIFN_BASE_CMD_CRYPT;
++
++ base_cmd = (hifn_base_command_t *)buf_pos;
++ base_cmd->masks = htole16(cmd->base_masks);
++ slen = cmd->src_mapsize;
++ if (cmd->sloplen)
++ dlen = cmd->dst_mapsize - cmd->sloplen + sizeof(u_int32_t);
++ else
++ dlen = cmd->dst_mapsize;
++ base_cmd->total_source_count = htole16(slen & HIFN_BASE_CMD_LENMASK_LO);
++ base_cmd->total_dest_count = htole16(dlen & HIFN_BASE_CMD_LENMASK_LO);
++ dlen >>= 16;
++ slen >>= 16;
++ base_cmd->session_num = htole16(
++ ((slen << HIFN_BASE_CMD_SRCLEN_S) & HIFN_BASE_CMD_SRCLEN_M) |
++ ((dlen << HIFN_BASE_CMD_DSTLEN_S) & HIFN_BASE_CMD_DSTLEN_M));
++ buf_pos += sizeof(hifn_base_command_t);
++
++ if (using_mac) {
++ mac_cmd = (hifn_mac_command_t *)buf_pos;
++ dlen = cmd->maccrd->crd_len;
++ mac_cmd->source_count = htole16(dlen & 0xffff);
++ dlen >>= 16;
++ mac_cmd->masks = htole16(cmd->mac_masks |
++ ((dlen << HIFN_MAC_CMD_SRCLEN_S) & HIFN_MAC_CMD_SRCLEN_M));
++ mac_cmd->header_skip = htole16(cmd->maccrd->crd_skip);
++ mac_cmd->reserved = 0;
++ buf_pos += sizeof(hifn_mac_command_t);
++ }
++
++ if (using_crypt) {
++ cry_cmd = (hifn_crypt_command_t *)buf_pos;
++ dlen = cmd->enccrd->crd_len;
++ cry_cmd->source_count = htole16(dlen & 0xffff);
++ dlen >>= 16;
++ cry_cmd->masks = htole16(cmd->cry_masks |
++ ((dlen << HIFN_CRYPT_CMD_SRCLEN_S) & HIFN_CRYPT_CMD_SRCLEN_M));
++ cry_cmd->header_skip = htole16(cmd->enccrd->crd_skip);
++ cry_cmd->reserved = 0;
++ buf_pos += sizeof(hifn_crypt_command_t);
++ }
++
++ if (using_mac && cmd->mac_masks & HIFN_MAC_CMD_NEW_KEY) {
++ bcopy(cmd->mac, buf_pos, HIFN_MAC_KEY_LENGTH);
++ buf_pos += HIFN_MAC_KEY_LENGTH;
++ }
++
++ if (using_crypt && cmd->cry_masks & HIFN_CRYPT_CMD_NEW_KEY) {
++ switch (cmd->cry_masks & HIFN_CRYPT_CMD_ALG_MASK) {
++ case HIFN_CRYPT_CMD_ALG_3DES:
++ bcopy(cmd->ck, buf_pos, HIFN_3DES_KEY_LENGTH);
++ buf_pos += HIFN_3DES_KEY_LENGTH;
++ break;
++ case HIFN_CRYPT_CMD_ALG_DES:
++ bcopy(cmd->ck, buf_pos, HIFN_DES_KEY_LENGTH);
++ buf_pos += HIFN_DES_KEY_LENGTH;
++ break;
++ case HIFN_CRYPT_CMD_ALG_RC4:
++ len = 256;
++ do {
++ int clen;
++
++ clen = MIN(cmd->cklen, len);
++ bcopy(cmd->ck, buf_pos, clen);
++ len -= clen;
++ buf_pos += clen;
++ } while (len > 0);
++ bzero(buf_pos, 4);
++ buf_pos += 4;
++ break;
++ case HIFN_CRYPT_CMD_ALG_AES:
++ /*
++ * AES keys are variable 128, 192 and
++ * 256 bits (16, 24 and 32 bytes).
++ */
++ bcopy(cmd->ck, buf_pos, cmd->cklen);
++ buf_pos += cmd->cklen;
++ break;
++ }
++ }
++
++ if (using_crypt && cmd->cry_masks & HIFN_CRYPT_CMD_NEW_IV) {
++ switch (cmd->cry_masks & HIFN_CRYPT_CMD_ALG_MASK) {
++ case HIFN_CRYPT_CMD_ALG_AES:
++ ivlen = HIFN_AES_IV_LENGTH;
++ break;
++ default:
++ ivlen = HIFN_IV_LENGTH;
++ break;
++ }
++ bcopy(cmd->iv, buf_pos, ivlen);
++ buf_pos += ivlen;
++ }
++
++ if ((cmd->base_masks & (HIFN_BASE_CMD_MAC|HIFN_BASE_CMD_CRYPT)) == 0) {
++ bzero(buf_pos, 8);
++ buf_pos += 8;
++ }
++
++ return (buf_pos - buf);
++}
++
++static int
++hifn_dmamap_aligned(struct hifn_operand *op)
++{
++ struct hifn_softc *sc = NULL;
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ for (i = 0; i < op->nsegs; i++) {
++ if (op->segs[i].ds_addr & 3)
++ return (0);
++ if ((i != (op->nsegs - 1)) && (op->segs[i].ds_len & 3))
++ return (0);
++ }
++ return (1);
++}
++
++static __inline int
++hifn_dmamap_dstwrap(struct hifn_softc *sc, int idx)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++
++ if (++idx == HIFN_D_DST_RSIZE) {
++ dma->dstr[idx].l = htole32(HIFN_D_VALID | HIFN_D_JUMP |
++ HIFN_D_MASKDONEIRQ);
++ HIFN_DSTR_SYNC(sc, idx,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ idx = 0;
++ }
++ return (idx);
++}
++
++static int
++hifn_dmamap_load_dst(struct hifn_softc *sc, struct hifn_command *cmd)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ struct hifn_operand *dst = &cmd->dst;
++ u_int32_t p, l;
++ int idx, used = 0, i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ idx = dma->dsti;
++ for (i = 0; i < dst->nsegs - 1; i++) {
++ dma->dstr[idx].p = htole32(dst->segs[i].ds_addr);
++ dma->dstr[idx].l = htole32(HIFN_D_MASKDONEIRQ | dst->segs[i].ds_len);
++ wmb();
++ dma->dstr[idx].l |= htole32(HIFN_D_VALID);
++ HIFN_DSTR_SYNC(sc, idx,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ used++;
++
++ idx = hifn_dmamap_dstwrap(sc, idx);
++ }
++
++ if (cmd->sloplen == 0) {
++ p = dst->segs[i].ds_addr;
++ l = HIFN_D_MASKDONEIRQ | HIFN_D_LAST |
++ dst->segs[i].ds_len;
++ } else {
++ p = sc->sc_dma_physaddr +
++ offsetof(struct hifn_dma, slop[cmd->slopidx]);
++ l = HIFN_D_MASKDONEIRQ | HIFN_D_LAST |
++ sizeof(u_int32_t);
++
++ if ((dst->segs[i].ds_len - cmd->sloplen) != 0) {
++ dma->dstr[idx].p = htole32(dst->segs[i].ds_addr);
++ dma->dstr[idx].l = htole32(HIFN_D_MASKDONEIRQ |
++ (dst->segs[i].ds_len - cmd->sloplen));
++ wmb();
++ dma->dstr[idx].l |= htole32(HIFN_D_VALID);
++ HIFN_DSTR_SYNC(sc, idx,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ used++;
++
++ idx = hifn_dmamap_dstwrap(sc, idx);
++ }
++ }
++ dma->dstr[idx].p = htole32(p);
++ dma->dstr[idx].l = htole32(l);
++ wmb();
++ dma->dstr[idx].l |= htole32(HIFN_D_VALID);
++ HIFN_DSTR_SYNC(sc, idx, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ used++;
++
++ idx = hifn_dmamap_dstwrap(sc, idx);
++
++ dma->dsti = idx;
++ dma->dstu += used;
++ return (idx);
++}
++
++static __inline int
++hifn_dmamap_srcwrap(struct hifn_softc *sc, int idx)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++
++ if (++idx == HIFN_D_SRC_RSIZE) {
++ dma->srcr[idx].l = htole32(HIFN_D_VALID |
++ HIFN_D_JUMP | HIFN_D_MASKDONEIRQ);
++ HIFN_SRCR_SYNC(sc, HIFN_D_SRC_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ idx = 0;
++ }
++ return (idx);
++}
++
++static int
++hifn_dmamap_load_src(struct hifn_softc *sc, struct hifn_command *cmd)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ struct hifn_operand *src = &cmd->src;
++ int idx, i;
++ u_int32_t last = 0;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ idx = dma->srci;
++ for (i = 0; i < src->nsegs; i++) {
++ if (i == src->nsegs - 1)
++ last = HIFN_D_LAST;
++
++ dma->srcr[idx].p = htole32(src->segs[i].ds_addr);
++ dma->srcr[idx].l = htole32(src->segs[i].ds_len |
++ HIFN_D_MASKDONEIRQ | last);
++ wmb();
++ dma->srcr[idx].l |= htole32(HIFN_D_VALID);
++ HIFN_SRCR_SYNC(sc, idx,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++
++ idx = hifn_dmamap_srcwrap(sc, idx);
++ }
++ dma->srci = idx;
++ dma->srcu += src->nsegs;
++ return (idx);
++}
++
++
++static int
++hifn_crypto(
++ struct hifn_softc *sc,
++ struct hifn_command *cmd,
++ struct cryptop *crp,
++ int hint)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ u_int32_t cmdlen, csr;
++ int cmdi, resi, err = 0;
++ unsigned long l_flags;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /*
++ * need 1 cmd, and 1 res
++ *
++ * NB: check this first since it's easy.
++ */
++ HIFN_LOCK(sc);
++ if ((dma->cmdu + 1) > HIFN_D_CMD_RSIZE ||
++ (dma->resu + 1) > HIFN_D_RES_RSIZE) {
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ device_printf(sc->sc_dev,
++ "cmd/result exhaustion, cmdu %u resu %u\n",
++ dma->cmdu, dma->resu);
++ }
++#endif
++ hifnstats.hst_nomem_cr++;
++ sc->sc_needwakeup |= CRYPTO_SYMQ;
++ HIFN_UNLOCK(sc);
++ return (ERESTART);
++ }
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (pci_map_skb(sc, &cmd->src, cmd->src_skb)) {
++ hifnstats.hst_nomem_load++;
++ err = ENOMEM;
++ goto err_srcmap1;
++ }
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ if (pci_map_uio(sc, &cmd->src, cmd->src_io)) {
++ hifnstats.hst_nomem_load++;
++ err = ENOMEM;
++ goto err_srcmap1;
++ }
++ } else {
++ if (pci_map_buf(sc, &cmd->src, cmd->src_buf, crp->crp_ilen)) {
++ hifnstats.hst_nomem_load++;
++ err = ENOMEM;
++ goto err_srcmap1;
++ }
++ }
++
++ if (hifn_dmamap_aligned(&cmd->src)) {
++ cmd->sloplen = cmd->src_mapsize & 3;
++ cmd->dst = cmd->src;
++ } else {
++ if (crp->crp_flags & CRYPTO_F_IOV) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto err_srcmap;
++ } else if (crp->crp_flags & CRYPTO_F_SKBUF) {
++#ifdef NOTYET
++ int totlen, len;
++ struct mbuf *m, *m0, *mlast;
++
++ KASSERT(cmd->dst_m == cmd->src_m,
++ ("hifn_crypto: dst_m initialized improperly"));
++ hifnstats.hst_unaligned++;
++ /*
++ * Source is not aligned on a longword boundary.
++ * Copy the data to insure alignment. If we fail
++ * to allocate mbufs or clusters while doing this
++ * we return ERESTART so the operation is requeued
++ * at the crypto later, but only if there are
++ * ops already posted to the hardware; otherwise we
++ * have no guarantee that we'll be re-entered.
++ */
++ totlen = cmd->src_mapsize;
++ if (cmd->src_m->m_flags & M_PKTHDR) {
++ len = MHLEN;
++ MGETHDR(m0, M_DONTWAIT, MT_DATA);
++ if (m0 && !m_dup_pkthdr(m0, cmd->src_m, M_DONTWAIT)) {
++ m_free(m0);
++ m0 = NULL;
++ }
++ } else {
++ len = MLEN;
++ MGET(m0, M_DONTWAIT, MT_DATA);
++ }
++ if (m0 == NULL) {
++ hifnstats.hst_nomem_mbuf++;
++ err = dma->cmdu ? ERESTART : ENOMEM;
++ goto err_srcmap;
++ }
++ if (totlen >= MINCLSIZE) {
++ MCLGET(m0, M_DONTWAIT);
++ if ((m0->m_flags & M_EXT) == 0) {
++ hifnstats.hst_nomem_mcl++;
++ err = dma->cmdu ? ERESTART : ENOMEM;
++ m_freem(m0);
++ goto err_srcmap;
++ }
++ len = MCLBYTES;
++ }
++ totlen -= len;
++ m0->m_pkthdr.len = m0->m_len = len;
++ mlast = m0;
++
++ while (totlen > 0) {
++ MGET(m, M_DONTWAIT, MT_DATA);
++ if (m == NULL) {
++ hifnstats.hst_nomem_mbuf++;
++ err = dma->cmdu ? ERESTART : ENOMEM;
++ m_freem(m0);
++ goto err_srcmap;
++ }
++ len = MLEN;
++ if (totlen >= MINCLSIZE) {
++ MCLGET(m, M_DONTWAIT);
++ if ((m->m_flags & M_EXT) == 0) {
++ hifnstats.hst_nomem_mcl++;
++ err = dma->cmdu ? ERESTART : ENOMEM;
++ mlast->m_next = m;
++ m_freem(m0);
++ goto err_srcmap;
++ }
++ len = MCLBYTES;
++ }
++
++ m->m_len = len;
++ m0->m_pkthdr.len += len;
++ totlen -= len;
++
++ mlast->m_next = m;
++ mlast = m;
++ }
++ cmd->dst_m = m0;
++#else
++ device_printf(sc->sc_dev,
++ "%s,%d: CRYPTO_F_SKBUF unaligned not implemented\n",
++ __FILE__, __LINE__);
++ err = EINVAL;
++ goto err_srcmap;
++#endif
++ } else {
++ device_printf(sc->sc_dev,
++ "%s,%d: unaligned contig buffers not implemented\n",
++ __FILE__, __LINE__);
++ err = EINVAL;
++ goto err_srcmap;
++ }
++ }
++
++ if (cmd->dst_map == NULL) {
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (pci_map_skb(sc, &cmd->dst, cmd->dst_skb)) {
++ hifnstats.hst_nomem_map++;
++ err = ENOMEM;
++ goto err_dstmap1;
++ }
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ if (pci_map_uio(sc, &cmd->dst, cmd->dst_io)) {
++ hifnstats.hst_nomem_load++;
++ err = ENOMEM;
++ goto err_dstmap1;
++ }
++ } else {
++ if (pci_map_buf(sc, &cmd->dst, cmd->dst_buf, crp->crp_ilen)) {
++ hifnstats.hst_nomem_load++;
++ err = ENOMEM;
++ goto err_dstmap1;
++ }
++ }
++ }
++
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ device_printf(sc->sc_dev,
++ "Entering cmd: stat %8x ien %8x u %d/%d/%d/%d n %d/%d\n",
++ READ_REG_1(sc, HIFN_1_DMA_CSR),
++ READ_REG_1(sc, HIFN_1_DMA_IER),
++ dma->cmdu, dma->srcu, dma->dstu, dma->resu,
++ cmd->src_nsegs, cmd->dst_nsegs);
++ }
++#endif
++
++#if 0
++ if (cmd->src_map == cmd->dst_map) {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD);
++ } else {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_PREWRITE);
++ bus_dmamap_sync(sc->sc_dmat, cmd->dst_map,
++ BUS_DMASYNC_PREREAD);
++ }
++#endif
++
++ /*
++ * need N src, and N dst
++ */
++ if ((dma->srcu + cmd->src_nsegs) > HIFN_D_SRC_RSIZE ||
++ (dma->dstu + cmd->dst_nsegs + 1) > HIFN_D_DST_RSIZE) {
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ device_printf(sc->sc_dev,
++ "src/dst exhaustion, srcu %u+%u dstu %u+%u\n",
++ dma->srcu, cmd->src_nsegs,
++ dma->dstu, cmd->dst_nsegs);
++ }
++#endif
++ hifnstats.hst_nomem_sd++;
++ err = ERESTART;
++ goto err_dstmap;
++ }
++
++ if (dma->cmdi == HIFN_D_CMD_RSIZE) {
++ dma->cmdi = 0;
++ dma->cmdr[HIFN_D_CMD_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->cmdr[HIFN_D_CMD_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_CMDR_SYNC(sc, HIFN_D_CMD_RSIZE,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ }
++ cmdi = dma->cmdi++;
++ cmdlen = hifn_write_command(cmd, dma->command_bufs[cmdi]);
++ HIFN_CMD_SYNC(sc, cmdi, BUS_DMASYNC_PREWRITE);
++
++ /* .p for command/result already set */
++ dma->cmdr[cmdi].l = htole32(cmdlen | HIFN_D_LAST |
++ HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->cmdr[cmdi].l |= htole32(HIFN_D_VALID);
++ HIFN_CMDR_SYNC(sc, cmdi,
++ BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
++ dma->cmdu++;
++
++ /*
++ * We don't worry about missing an interrupt (which a "command wait"
++ * interrupt salvages us from), unless there is more than one command
++ * in the queue.
++ */
++ if (dma->cmdu > 1) {
++ sc->sc_dmaier |= HIFN_DMAIER_C_WAIT;
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, sc->sc_dmaier);
++ }
++
++ hifnstats.hst_ipackets++;
++ hifnstats.hst_ibytes += cmd->src_mapsize;
++
++ hifn_dmamap_load_src(sc, cmd);
++
++ /*
++ * Unlike other descriptors, we don't mask done interrupt from
++ * result descriptor.
++ */
++#ifdef HIFN_DEBUG
++ if (hifn_debug)
++ device_printf(sc->sc_dev, "load res\n");
++#endif
++ if (dma->resi == HIFN_D_RES_RSIZE) {
++ dma->resi = 0;
++ dma->resr[HIFN_D_RES_RSIZE].l = htole32(HIFN_D_JUMP|HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->resr[HIFN_D_RES_RSIZE].l |= htole32(HIFN_D_VALID);
++ HIFN_RESR_SYNC(sc, HIFN_D_RES_RSIZE,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ }
++ resi = dma->resi++;
++ KASSERT(dma->hifn_commands[resi] == NULL,
++ ("hifn_crypto: command slot %u busy", resi));
++ dma->hifn_commands[resi] = cmd;
++ HIFN_RES_SYNC(sc, resi, BUS_DMASYNC_PREREAD);
++ if ((hint & CRYPTO_HINT_MORE) && sc->sc_curbatch < hifn_maxbatch) {
++ dma->resr[resi].l = htole32(HIFN_MAX_RESULT |
++ HIFN_D_LAST | HIFN_D_MASKDONEIRQ);
++ wmb();
++ dma->resr[resi].l |= htole32(HIFN_D_VALID);
++ sc->sc_curbatch++;
++ if (sc->sc_curbatch > hifnstats.hst_maxbatch)
++ hifnstats.hst_maxbatch = sc->sc_curbatch;
++ hifnstats.hst_totbatch++;
++ } else {
++ dma->resr[resi].l = htole32(HIFN_MAX_RESULT | HIFN_D_LAST);
++ wmb();
++ dma->resr[resi].l |= htole32(HIFN_D_VALID);
++ sc->sc_curbatch = 0;
++ }
++ HIFN_RESR_SYNC(sc, resi,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ dma->resu++;
++
++ if (cmd->sloplen)
++ cmd->slopidx = resi;
++
++ hifn_dmamap_load_dst(sc, cmd);
++
++ csr = 0;
++ if (sc->sc_c_busy == 0) {
++ csr |= HIFN_DMACSR_C_CTRL_ENA;
++ sc->sc_c_busy = 1;
++ }
++ if (sc->sc_s_busy == 0) {
++ csr |= HIFN_DMACSR_S_CTRL_ENA;
++ sc->sc_s_busy = 1;
++ }
++ if (sc->sc_r_busy == 0) {
++ csr |= HIFN_DMACSR_R_CTRL_ENA;
++ sc->sc_r_busy = 1;
++ }
++ if (sc->sc_d_busy == 0) {
++ csr |= HIFN_DMACSR_D_CTRL_ENA;
++ sc->sc_d_busy = 1;
++ }
++ if (csr)
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR, csr);
++
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ device_printf(sc->sc_dev, "command: stat %8x ier %8x\n",
++ READ_REG_1(sc, HIFN_1_DMA_CSR),
++ READ_REG_1(sc, HIFN_1_DMA_IER));
++ }
++#endif
++
++ sc->sc_active = 5;
++ HIFN_UNLOCK(sc);
++ KASSERT(err == 0, ("hifn_crypto: success with error %u", err));
++ return (err); /* success */
++
++err_dstmap:
++ if (cmd->src_map != cmd->dst_map)
++ pci_unmap_buf(sc, &cmd->dst);
++err_dstmap1:
++err_srcmap:
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (cmd->src_skb != cmd->dst_skb)
++#ifdef NOTYET
++ m_freem(cmd->dst_m);
++#else
++ device_printf(sc->sc_dev,
++ "%s,%d: CRYPTO_F_SKBUF src != dst not implemented\n",
++ __FILE__, __LINE__);
++#endif
++ }
++ pci_unmap_buf(sc, &cmd->src);
++err_srcmap1:
++ HIFN_UNLOCK(sc);
++ return (err);
++}
++
++static void
++hifn_tick(unsigned long arg)
++{
++ struct hifn_softc *sc;
++ unsigned long l_flags;
++
++ if (arg >= HIFN_MAX_CHIPS)
++ return;
++ sc = hifn_chip_idx[arg];
++ if (!sc)
++ return;
++
++ HIFN_LOCK(sc);
++ if (sc->sc_active == 0) {
++ struct hifn_dma *dma = sc->sc_dma;
++ u_int32_t r = 0;
++
++ if (dma->cmdu == 0 && sc->sc_c_busy) {
++ sc->sc_c_busy = 0;
++ r |= HIFN_DMACSR_C_CTRL_DIS;
++ }
++ if (dma->srcu == 0 && sc->sc_s_busy) {
++ sc->sc_s_busy = 0;
++ r |= HIFN_DMACSR_S_CTRL_DIS;
++ }
++ if (dma->dstu == 0 && sc->sc_d_busy) {
++ sc->sc_d_busy = 0;
++ r |= HIFN_DMACSR_D_CTRL_DIS;
++ }
++ if (dma->resu == 0 && sc->sc_r_busy) {
++ sc->sc_r_busy = 0;
++ r |= HIFN_DMACSR_R_CTRL_DIS;
++ }
++ if (r)
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR, r);
++ } else
++ sc->sc_active--;
++ HIFN_UNLOCK(sc);
++ mod_timer(&sc->sc_tickto, jiffies + HZ);
++}
++
++static irqreturn_t
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++hifn_intr(int irq, void *arg)
++#else
++hifn_intr(int irq, void *arg, struct pt_regs *regs)
++#endif
++{
++ struct hifn_softc *sc = arg;
++ struct hifn_dma *dma;
++ u_int32_t dmacsr, restart;
++ int i, u;
++ unsigned long l_flags;
++
++ dmacsr = READ_REG_1(sc, HIFN_1_DMA_CSR);
++
++ /* Nothing in the DMA unit interrupted */
++ if ((dmacsr & sc->sc_dmaier) == 0)
++ return IRQ_NONE;
++
++ HIFN_LOCK(sc);
++
++ dma = sc->sc_dma;
++
++#ifdef HIFN_DEBUG
++ if (hifn_debug) {
++ device_printf(sc->sc_dev,
++ "irq: stat %08x ien %08x damier %08x i %d/%d/%d/%d k %d/%d/%d/%d u %d/%d/%d/%d\n",
++ dmacsr, READ_REG_1(sc, HIFN_1_DMA_IER), sc->sc_dmaier,
++ dma->cmdi, dma->srci, dma->dsti, dma->resi,
++ dma->cmdk, dma->srck, dma->dstk, dma->resk,
++ dma->cmdu, dma->srcu, dma->dstu, dma->resu);
++ }
++#endif
++
++ WRITE_REG_1(sc, HIFN_1_DMA_CSR, dmacsr & sc->sc_dmaier);
++
++ if ((sc->sc_flags & HIFN_HAS_PUBLIC) &&
++ (dmacsr & HIFN_DMACSR_PUBDONE))
++ WRITE_REG_1(sc, HIFN_1_PUB_STATUS,
++ READ_REG_1(sc, HIFN_1_PUB_STATUS) | HIFN_PUBSTS_DONE);
++
++ restart = dmacsr & (HIFN_DMACSR_D_OVER | HIFN_DMACSR_R_OVER);
++ if (restart)
++ device_printf(sc->sc_dev, "overrun %x\n", dmacsr);
++
++ if (sc->sc_flags & HIFN_IS_7811) {
++ if (dmacsr & HIFN_DMACSR_ILLR)
++ device_printf(sc->sc_dev, "illegal read\n");
++ if (dmacsr & HIFN_DMACSR_ILLW)
++ device_printf(sc->sc_dev, "illegal write\n");
++ }
++
++ restart = dmacsr & (HIFN_DMACSR_C_ABORT | HIFN_DMACSR_S_ABORT |
++ HIFN_DMACSR_D_ABORT | HIFN_DMACSR_R_ABORT);
++ if (restart) {
++ device_printf(sc->sc_dev, "abort, resetting.\n");
++ hifnstats.hst_abort++;
++ hifn_abort(sc);
++ HIFN_UNLOCK(sc);
++ return IRQ_HANDLED;
++ }
++
++ if ((dmacsr & HIFN_DMACSR_C_WAIT) && (dma->cmdu == 0)) {
++ /*
++ * If no slots to process and we receive a "waiting on
++ * command" interrupt, we disable the "waiting on command"
++ * (by clearing it).
++ */
++ sc->sc_dmaier &= ~HIFN_DMAIER_C_WAIT;
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, sc->sc_dmaier);
++ }
++
++ /* clear the rings */
++ i = dma->resk; u = dma->resu;
++ while (u != 0) {
++ HIFN_RESR_SYNC(sc, i,
++ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
++ if (dma->resr[i].l & htole32(HIFN_D_VALID)) {
++ HIFN_RESR_SYNC(sc, i,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ break;
++ }
++
++ if (i != HIFN_D_RES_RSIZE) {
++ struct hifn_command *cmd;
++ u_int8_t *macbuf = NULL;
++
++ HIFN_RES_SYNC(sc, i, BUS_DMASYNC_POSTREAD);
++ cmd = dma->hifn_commands[i];
++ KASSERT(cmd != NULL,
++ ("hifn_intr: null command slot %u", i));
++ dma->hifn_commands[i] = NULL;
++
++ if (cmd->base_masks & HIFN_BASE_CMD_MAC) {
++ macbuf = dma->result_bufs[i];
++ macbuf += 12;
++ }
++
++ hifn_callback(sc, cmd, macbuf);
++ hifnstats.hst_opackets++;
++ u--;
++ }
++
++ if (++i == (HIFN_D_RES_RSIZE + 1))
++ i = 0;
++ }
++ dma->resk = i; dma->resu = u;
++
++ i = dma->srck; u = dma->srcu;
++ while (u != 0) {
++ if (i == HIFN_D_SRC_RSIZE)
++ i = 0;
++ HIFN_SRCR_SYNC(sc, i,
++ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
++ if (dma->srcr[i].l & htole32(HIFN_D_VALID)) {
++ HIFN_SRCR_SYNC(sc, i,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ break;
++ }
++ i++, u--;
++ }
++ dma->srck = i; dma->srcu = u;
++
++ i = dma->cmdk; u = dma->cmdu;
++ while (u != 0) {
++ HIFN_CMDR_SYNC(sc, i,
++ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
++ if (dma->cmdr[i].l & htole32(HIFN_D_VALID)) {
++ HIFN_CMDR_SYNC(sc, i,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++ break;
++ }
++ if (i != HIFN_D_CMD_RSIZE) {
++ u--;
++ HIFN_CMD_SYNC(sc, i, BUS_DMASYNC_POSTWRITE);
++ }
++ if (++i == (HIFN_D_CMD_RSIZE + 1))
++ i = 0;
++ }
++ dma->cmdk = i; dma->cmdu = u;
++
++ HIFN_UNLOCK(sc);
++
++ if (sc->sc_needwakeup) { /* XXX check high watermark */
++ int wakeup = sc->sc_needwakeup & (CRYPTO_SYMQ|CRYPTO_ASYMQ);
++#ifdef HIFN_DEBUG
++ if (hifn_debug)
++ device_printf(sc->sc_dev,
++ "wakeup crypto (%x) u %d/%d/%d/%d\n",
++ sc->sc_needwakeup,
++ dma->cmdu, dma->srcu, dma->dstu, dma->resu);
++#endif
++ sc->sc_needwakeup &= ~wakeup;
++ crypto_unblock(sc->sc_cid, wakeup);
++ }
++
++ return IRQ_HANDLED;
++}
++
++/*
++ * Allocate a new 'session' and return an encoded session id. 'sidp'
++ * contains our registration id, and should contain an encoded session
++ * id on successful allocation.
++ */
++static int
++hifn_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
++{
++ struct hifn_softc *sc = device_get_softc(dev);
++ struct cryptoini *c;
++ int mac = 0, cry = 0, sesn;
++ struct hifn_session *ses = NULL;
++ unsigned long l_flags;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ KASSERT(sc != NULL, ("hifn_newsession: null softc"));
++ if (sidp == NULL || cri == NULL || sc == NULL) {
++ DPRINTF("%s,%d: %s - EINVAL\n", __FILE__, __LINE__, __FUNCTION__);
++ return (EINVAL);
++ }
++
++ HIFN_LOCK(sc);
++ if (sc->sc_sessions == NULL) {
++ ses = sc->sc_sessions = (struct hifn_session *)kmalloc(sizeof(*ses),
++ SLAB_ATOMIC);
++ if (ses == NULL) {
++ HIFN_UNLOCK(sc);
++ return (ENOMEM);
++ }
++ sesn = 0;
++ sc->sc_nsessions = 1;
++ } else {
++ for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
++ if (!sc->sc_sessions[sesn].hs_used) {
++ ses = &sc->sc_sessions[sesn];
++ break;
++ }
++ }
++
++ if (ses == NULL) {
++ sesn = sc->sc_nsessions;
++ ses = (struct hifn_session *)kmalloc((sesn + 1) * sizeof(*ses),
++ SLAB_ATOMIC);
++ if (ses == NULL) {
++ HIFN_UNLOCK(sc);
++ return (ENOMEM);
++ }
++ bcopy(sc->sc_sessions, ses, sesn * sizeof(*ses));
++ bzero(sc->sc_sessions, sesn * sizeof(*ses));
++ kfree(sc->sc_sessions);
++ sc->sc_sessions = ses;
++ ses = &sc->sc_sessions[sesn];
++ sc->sc_nsessions++;
++ }
++ }
++ HIFN_UNLOCK(sc);
++
++ bzero(ses, sizeof(*ses));
++ ses->hs_used = 1;
++
++ for (c = cri; c != NULL; c = c->cri_next) {
++ switch (c->cri_alg) {
++ case CRYPTO_MD5:
++ case CRYPTO_SHA1:
++ case CRYPTO_MD5_HMAC:
++ case CRYPTO_SHA1_HMAC:
++ if (mac) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++ mac = 1;
++ ses->hs_mlen = c->cri_mlen;
++ if (ses->hs_mlen == 0) {
++ switch (c->cri_alg) {
++ case CRYPTO_MD5:
++ case CRYPTO_MD5_HMAC:
++ ses->hs_mlen = 16;
++ break;
++ case CRYPTO_SHA1:
++ case CRYPTO_SHA1_HMAC:
++ ses->hs_mlen = 20;
++ break;
++ }
++ }
++ break;
++ case CRYPTO_DES_CBC:
++ case CRYPTO_3DES_CBC:
++ case CRYPTO_AES_CBC:
++ /* XXX this may read fewer, does it matter? */
++ read_random(ses->hs_iv,
++ c->cri_alg == CRYPTO_AES_CBC ?
++ HIFN_AES_IV_LENGTH : HIFN_IV_LENGTH);
++ /*FALLTHROUGH*/
++ case CRYPTO_ARC4:
++ if (cry) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++ cry = 1;
++ break;
++ default:
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++ }
++ if (mac == 0 && cry == 0) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++
++ *sidp = HIFN_SID(device_get_unit(sc->sc_dev), sesn);
++
++ return (0);
++}
++
++/*
++ * Deallocate a session.
++ * XXX this routine should run a zero'd mac/encrypt key into context ram.
++ * XXX to blow away any keys already stored there.
++ */
++static int
++hifn_freesession(device_t dev, u_int64_t tid)
++{
++ struct hifn_softc *sc = device_get_softc(dev);
++ int session, error;
++ u_int32_t sid = CRYPTO_SESID2LID(tid);
++ unsigned long l_flags;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ KASSERT(sc != NULL, ("hifn_freesession: null softc"));
++ if (sc == NULL) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++
++ HIFN_LOCK(sc);
++ session = HIFN_SESSION(sid);
++ if (session < sc->sc_nsessions) {
++ bzero(&sc->sc_sessions[session], sizeof(struct hifn_session));
++ error = 0;
++ } else {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ error = EINVAL;
++ }
++ HIFN_UNLOCK(sc);
++
++ return (error);
++}
++
++static int
++hifn_process(device_t dev, struct cryptop *crp, int hint)
++{
++ struct hifn_softc *sc = device_get_softc(dev);
++ struct hifn_command *cmd = NULL;
++ int session, err, ivlen;
++ struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (crp == NULL || crp->crp_callback == NULL) {
++ hifnstats.hst_invalid++;
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ return (EINVAL);
++ }
++ session = HIFN_SESSION(crp->crp_sid);
++
++ if (sc == NULL || session >= sc->sc_nsessions) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto errout;
++ }
++
++ cmd = kmalloc(sizeof(struct hifn_command), SLAB_ATOMIC);
++ if (cmd == NULL) {
++ hifnstats.hst_nomem++;
++ err = ENOMEM;
++ goto errout;
++ }
++ memset(cmd, 0, sizeof(*cmd));
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ cmd->src_skb = (struct sk_buff *)crp->crp_buf;
++ cmd->dst_skb = (struct sk_buff *)crp->crp_buf;
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ cmd->src_io = (struct uio *)crp->crp_buf;
++ cmd->dst_io = (struct uio *)crp->crp_buf;
++ } else {
++ cmd->src_buf = crp->crp_buf;
++ cmd->dst_buf = crp->crp_buf;
++ }
++
++ crd1 = crp->crp_desc;
++ if (crd1 == NULL) {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto errout;
++ }
++ crd2 = crd1->crd_next;
++
++ if (crd2 == NULL) {
++ if (crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1 ||
++ crd1->crd_alg == CRYPTO_MD5) {
++ maccrd = crd1;
++ enccrd = NULL;
++ } else if (crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC ||
++ crd1->crd_alg == CRYPTO_ARC4) {
++ if ((crd1->crd_flags & CRD_F_ENCRYPT) == 0)
++ cmd->base_masks |= HIFN_BASE_CMD_DECODE;
++ maccrd = NULL;
++ enccrd = crd1;
++ } else {
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto errout;
++ }
++ } else {
++ if ((crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_MD5 ||
++ crd1->crd_alg == CRYPTO_SHA1) &&
++ (crd2->crd_alg == CRYPTO_DES_CBC ||
++ crd2->crd_alg == CRYPTO_3DES_CBC ||
++ crd2->crd_alg == CRYPTO_AES_CBC ||
++ crd2->crd_alg == CRYPTO_ARC4) &&
++ ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) {
++ cmd->base_masks = HIFN_BASE_CMD_DECODE;
++ maccrd = crd1;
++ enccrd = crd2;
++ } else if ((crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_ARC4 ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC) &&
++ (crd2->crd_alg == CRYPTO_MD5_HMAC ||
++ crd2->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd2->crd_alg == CRYPTO_MD5 ||
++ crd2->crd_alg == CRYPTO_SHA1) &&
++ (crd1->crd_flags & CRD_F_ENCRYPT)) {
++ enccrd = crd1;
++ maccrd = crd2;
++ } else {
++ /*
++ * We cannot order the 7751 as requested
++ */
++ DPRINTF("%s,%d: %s %d,%d,%d - EINVAL\n",__FILE__,__LINE__,__FUNCTION__, crd1->crd_alg, crd2->crd_alg, crd1->crd_flags & CRD_F_ENCRYPT);
++ err = EINVAL;
++ goto errout;
++ }
++ }
++
++ if (enccrd) {
++ cmd->enccrd = enccrd;
++ cmd->base_masks |= HIFN_BASE_CMD_CRYPT;
++ switch (enccrd->crd_alg) {
++ case CRYPTO_ARC4:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_ALG_RC4;
++ break;
++ case CRYPTO_DES_CBC:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_ALG_DES |
++ HIFN_CRYPT_CMD_MODE_CBC |
++ HIFN_CRYPT_CMD_NEW_IV;
++ break;
++ case CRYPTO_3DES_CBC:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_ALG_3DES |
++ HIFN_CRYPT_CMD_MODE_CBC |
++ HIFN_CRYPT_CMD_NEW_IV;
++ break;
++ case CRYPTO_AES_CBC:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_ALG_AES |
++ HIFN_CRYPT_CMD_MODE_CBC |
++ HIFN_CRYPT_CMD_NEW_IV;
++ break;
++ default:
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto errout;
++ }
++ if (enccrd->crd_alg != CRYPTO_ARC4) {
++ ivlen = ((enccrd->crd_alg == CRYPTO_AES_CBC) ?
++ HIFN_AES_IV_LENGTH : HIFN_IV_LENGTH);
++ if (enccrd->crd_flags & CRD_F_ENCRYPT) {
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ bcopy(enccrd->crd_iv, cmd->iv, ivlen);
++ else
++ bcopy(sc->sc_sessions[session].hs_iv,
++ cmd->iv, ivlen);
++
++ if ((enccrd->crd_flags & CRD_F_IV_PRESENT)
++ == 0) {
++ crypto_copyback(crp->crp_flags,
++ crp->crp_buf, enccrd->crd_inject,
++ ivlen, cmd->iv);
++ }
++ } else {
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ bcopy(enccrd->crd_iv, cmd->iv, ivlen);
++ else {
++ crypto_copydata(crp->crp_flags,
++ crp->crp_buf, enccrd->crd_inject,
++ ivlen, cmd->iv);
++ }
++ }
++ }
++
++ if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT)
++ cmd->cry_masks |= HIFN_CRYPT_CMD_NEW_KEY;
++ cmd->ck = enccrd->crd_key;
++ cmd->cklen = enccrd->crd_klen >> 3;
++ cmd->cry_masks |= HIFN_CRYPT_CMD_NEW_KEY;
++
++ /*
++ * Need to specify the size for the AES key in the masks.
++ */
++ if ((cmd->cry_masks & HIFN_CRYPT_CMD_ALG_MASK) ==
++ HIFN_CRYPT_CMD_ALG_AES) {
++ switch (cmd->cklen) {
++ case 16:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_KSZ_128;
++ break;
++ case 24:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_KSZ_192;
++ break;
++ case 32:
++ cmd->cry_masks |= HIFN_CRYPT_CMD_KSZ_256;
++ break;
++ default:
++ DPRINTF("%s,%d: %s - EINVAL\n",__FILE__,__LINE__,__FUNCTION__);
++ err = EINVAL;
++ goto errout;
++ }
++ }
++ }
++
++ if (maccrd) {
++ cmd->maccrd = maccrd;
++ cmd->base_masks |= HIFN_BASE_CMD_MAC;
++
++ switch (maccrd->crd_alg) {
++ case CRYPTO_MD5:
++ cmd->mac_masks |= HIFN_MAC_CMD_ALG_MD5 |
++ HIFN_MAC_CMD_RESULT | HIFN_MAC_CMD_MODE_HASH |
++ HIFN_MAC_CMD_POS_IPSEC;
++ break;
++ case CRYPTO_MD5_HMAC:
++ cmd->mac_masks |= HIFN_MAC_CMD_ALG_MD5 |
++ HIFN_MAC_CMD_RESULT | HIFN_MAC_CMD_MODE_HMAC |
++ HIFN_MAC_CMD_POS_IPSEC | HIFN_MAC_CMD_TRUNC;
++ break;
++ case CRYPTO_SHA1:
++ cmd->mac_masks |= HIFN_MAC_CMD_ALG_SHA1 |
++ HIFN_MAC_CMD_RESULT | HIFN_MAC_CMD_MODE_HASH |
++ HIFN_MAC_CMD_POS_IPSEC;
++ break;
++ case CRYPTO_SHA1_HMAC:
++ cmd->mac_masks |= HIFN_MAC_CMD_ALG_SHA1 |
++ HIFN_MAC_CMD_RESULT | HIFN_MAC_CMD_MODE_HMAC |
++ HIFN_MAC_CMD_POS_IPSEC | HIFN_MAC_CMD_TRUNC;
++ break;
++ }
++
++ if (maccrd->crd_alg == CRYPTO_SHA1_HMAC ||
++ maccrd->crd_alg == CRYPTO_MD5_HMAC) {
++ cmd->mac_masks |= HIFN_MAC_CMD_NEW_KEY;
++ bcopy(maccrd->crd_key, cmd->mac, maccrd->crd_klen >> 3);
++ bzero(cmd->mac + (maccrd->crd_klen >> 3),
++ HIFN_MAC_KEY_LENGTH - (maccrd->crd_klen >> 3));
++ }
++ }
++
++ cmd->crp = crp;
++ cmd->session_num = session;
++ cmd->softc = sc;
++
++ err = hifn_crypto(sc, cmd, crp, hint);
++ if (!err) {
++ return 0;
++ } else if (err == ERESTART) {
++ /*
++ * There weren't enough resources to dispatch the request
++ * to the part. Notify the caller so they'll requeue this
++ * request and resubmit it again soon.
++ */
++#ifdef HIFN_DEBUG
++ if (hifn_debug)
++ device_printf(sc->sc_dev, "requeue request\n");
++#endif
++ kfree(cmd);
++ sc->sc_needwakeup |= CRYPTO_SYMQ;
++ return (err);
++ }
++
++errout:
++ if (cmd != NULL)
++ kfree(cmd);
++ if (err == EINVAL)
++ hifnstats.hst_invalid++;
++ else
++ hifnstats.hst_nomem++;
++ crp->crp_etype = err;
++ crypto_done(crp);
++ return (err);
++}
++
++static void
++hifn_abort(struct hifn_softc *sc)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ struct hifn_command *cmd;
++ struct cryptop *crp;
++ int i, u;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ i = dma->resk; u = dma->resu;
++ while (u != 0) {
++ cmd = dma->hifn_commands[i];
++ KASSERT(cmd != NULL, ("hifn_abort: null command slot %u", i));
++ dma->hifn_commands[i] = NULL;
++ crp = cmd->crp;
++
++ if ((dma->resr[i].l & htole32(HIFN_D_VALID)) == 0) {
++ /* Salvage what we can. */
++ u_int8_t *macbuf;
++
++ if (cmd->base_masks & HIFN_BASE_CMD_MAC) {
++ macbuf = dma->result_bufs[i];
++ macbuf += 12;
++ } else
++ macbuf = NULL;
++ hifnstats.hst_opackets++;
++ hifn_callback(sc, cmd, macbuf);
++ } else {
++#if 0
++ if (cmd->src_map == cmd->dst_map) {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
++ } else {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_POSTWRITE);
++ bus_dmamap_sync(sc->sc_dmat, cmd->dst_map,
++ BUS_DMASYNC_POSTREAD);
++ }
++#endif
++
++ if (cmd->src_skb != cmd->dst_skb) {
++#ifdef NOTYET
++ m_freem(cmd->src_m);
++ crp->crp_buf = (caddr_t)cmd->dst_m;
++#else
++ device_printf(sc->sc_dev,
++ "%s,%d: CRYPTO_F_SKBUF src != dst not implemented\n",
++ __FILE__, __LINE__);
++#endif
++ }
++
++ /* non-shared buffers cannot be restarted */
++ if (cmd->src_map != cmd->dst_map) {
++ /*
++ * XXX should be EAGAIN, delayed until
++ * after the reset.
++ */
++ crp->crp_etype = ENOMEM;
++ pci_unmap_buf(sc, &cmd->dst);
++ } else
++ crp->crp_etype = ENOMEM;
++
++ pci_unmap_buf(sc, &cmd->src);
++
++ kfree(cmd);
++ if (crp->crp_etype != EAGAIN)
++ crypto_done(crp);
++ }
++
++ if (++i == HIFN_D_RES_RSIZE)
++ i = 0;
++ u--;
++ }
++ dma->resk = i; dma->resu = u;
++
++ hifn_reset_board(sc, 1);
++ hifn_init_dma(sc);
++ hifn_init_pci_registers(sc);
++}
++
++static void
++hifn_callback(struct hifn_softc *sc, struct hifn_command *cmd, u_int8_t *macbuf)
++{
++ struct hifn_dma *dma = sc->sc_dma;
++ struct cryptop *crp = cmd->crp;
++ struct cryptodesc *crd;
++ int i, u, ivlen;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++#if 0
++ if (cmd->src_map == cmd->dst_map) {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
++ } else {
++ bus_dmamap_sync(sc->sc_dmat, cmd->src_map,
++ BUS_DMASYNC_POSTWRITE);
++ bus_dmamap_sync(sc->sc_dmat, cmd->dst_map,
++ BUS_DMASYNC_POSTREAD);
++ }
++#endif
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (cmd->src_skb != cmd->dst_skb) {
++#ifdef NOTYET
++ crp->crp_buf = (caddr_t)cmd->dst_m;
++ totlen = cmd->src_mapsize;
++ for (m = cmd->dst_m; m != NULL; m = m->m_next) {
++ if (totlen < m->m_len) {
++ m->m_len = totlen;
++ totlen = 0;
++ } else
++ totlen -= m->m_len;
++ }
++ cmd->dst_m->m_pkthdr.len = cmd->src_m->m_pkthdr.len;
++ m_freem(cmd->src_m);
++#else
++ device_printf(sc->sc_dev,
++ "%s,%d: CRYPTO_F_SKBUF src != dst not implemented\n",
++ __FILE__, __LINE__);
++#endif
++ }
++ }
++
++ if (cmd->sloplen != 0) {
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ cmd->src_mapsize - cmd->sloplen, cmd->sloplen,
++ (caddr_t)&dma->slop[cmd->slopidx]);
++ }
++
++ i = dma->dstk; u = dma->dstu;
++ while (u != 0) {
++ if (i == HIFN_D_DST_RSIZE)
++ i = 0;
++#if 0
++ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
++ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
++#endif
++ if (dma->dstr[i].l & htole32(HIFN_D_VALID)) {
++#if 0
++ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
++ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
++#endif
++ break;
++ }
++ i++, u--;
++ }
++ dma->dstk = i; dma->dstu = u;
++
++ hifnstats.hst_obytes += cmd->dst_mapsize;
++
++ if ((cmd->base_masks & (HIFN_BASE_CMD_CRYPT | HIFN_BASE_CMD_DECODE)) ==
++ HIFN_BASE_CMD_CRYPT) {
++ for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
++ if (crd->crd_alg != CRYPTO_DES_CBC &&
++ crd->crd_alg != CRYPTO_3DES_CBC &&
++ crd->crd_alg != CRYPTO_AES_CBC)
++ continue;
++ ivlen = ((crd->crd_alg == CRYPTO_AES_CBC) ?
++ HIFN_AES_IV_LENGTH : HIFN_IV_LENGTH);
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ crd->crd_skip + crd->crd_len - ivlen, ivlen,
++ cmd->softc->sc_sessions[cmd->session_num].hs_iv);
++ break;
++ }
++ }
++
++ if (macbuf != NULL) {
++ for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
++ int len;
++
++ if (crd->crd_alg != CRYPTO_MD5 &&
++ crd->crd_alg != CRYPTO_SHA1 &&
++ crd->crd_alg != CRYPTO_MD5_HMAC &&
++ crd->crd_alg != CRYPTO_SHA1_HMAC) {
++ continue;
++ }
++ len = cmd->softc->sc_sessions[cmd->session_num].hs_mlen;
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject, len, macbuf);
++ break;
++ }
++ }
++
++ if (cmd->src_map != cmd->dst_map)
++ pci_unmap_buf(sc, &cmd->dst);
++ pci_unmap_buf(sc, &cmd->src);
++ kfree(cmd);
++ crypto_done(crp);
++}
++
++/*
++ * 7811 PB3 rev/2 parts lock-up on burst writes to Group 0
++ * and Group 1 registers; avoid conditions that could create
++ * burst writes by doing a read in between the writes.
++ *
++ * NB: The read we interpose is always to the same register;
++ * we do this because reading from an arbitrary (e.g. last)
++ * register may not always work.
++ */
++static void
++hifn_write_reg_0(struct hifn_softc *sc, bus_size_t reg, u_int32_t val)
++{
++ if (sc->sc_flags & HIFN_IS_7811) {
++ if (sc->sc_bar0_lastreg == reg - 4)
++ readl(sc->sc_bar0 + HIFN_0_PUCNFG);
++ sc->sc_bar0_lastreg = reg;
++ }
++ writel(val, sc->sc_bar0 + reg);
++}
++
++static void
++hifn_write_reg_1(struct hifn_softc *sc, bus_size_t reg, u_int32_t val)
++{
++ if (sc->sc_flags & HIFN_IS_7811) {
++ if (sc->sc_bar1_lastreg == reg - 4)
++ readl(sc->sc_bar1 + HIFN_1_REVID);
++ sc->sc_bar1_lastreg = reg;
++ }
++ writel(val, sc->sc_bar1 + reg);
++}
++
++
++static struct pci_device_id hifn_pci_tbl[] = {
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7951,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7955,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7956,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_NETSEC, PCI_PRODUCT_NETSEC_7751,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_INVERTEX, PCI_PRODUCT_INVERTEX_AEON,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7811,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ /*
++ * Other vendors share this PCI ID as well, such as
++ * http://www.powercrypt.com, and obviously they also
++ * use the same key.
++ */
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7751,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { 0, 0, 0, 0, 0, 0, }
++};
++MODULE_DEVICE_TABLE(pci, hifn_pci_tbl);
++
++static struct pci_driver hifn_driver = {
++ .name = "hifn",
++ .id_table = hifn_pci_tbl,
++ .probe = hifn_probe,
++ .remove = hifn_remove,
++ /* add PM stuff here one day */
++};
++
++static int __init hifn_init (void)
++{
++ struct hifn_softc *sc = NULL;
++ int rc;
++
++ DPRINTF("%s(%p)\n", __FUNCTION__, hifn_init);
++
++ rc = pci_register_driver(&hifn_driver);
++ pci_register_driver_compat(&hifn_driver, rc);
++
++ return rc;
++}
++
++static void __exit hifn_exit (void)
++{
++ pci_unregister_driver(&hifn_driver);
++}
++
++module_init(hifn_init);
++module_exit(hifn_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("OCF driver for hifn PCI crypto devices");
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifn7751reg.h linux-2.6.30/crypto/ocf/hifn/hifn7751reg.h
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifn7751reg.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifn7751reg.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,540 @@
++/* $FreeBSD: src/sys/dev/hifn/hifn7751reg.h,v 1.7 2007/03/21 03:42:49 sam Exp $ */
++/* $OpenBSD: hifn7751reg.h,v 1.35 2002/04/08 17:49:42 jason Exp $ */
++
++/*-
++ * Invertex AEON / Hifn 7751 driver
++ * Copyright (c) 1999 Invertex Inc. All rights reserved.
++ * Copyright (c) 1999 Theo de Raadt
++ * Copyright (c) 2000-2001 Network Security Technologies, Inc.
++ * http://www.netsec.net
++ *
++ * Please send any comments, feedback, bug-fixes, or feature requests to
++ * software@invertex.com.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored in part by the Defense Advanced Research Projects
++ * Agency (DARPA) and Air Force Research Laboratory, Air Force
++ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
++ *
++ */
++#ifndef __HIFN_H__
++#define __HIFN_H__
++
++/*
++ * Some PCI configuration space offset defines. The names were made
++ * identical to the names used by the Linux kernel.
++ */
++#define HIFN_BAR0 PCIR_BAR(0) /* PUC register map */
++#define HIFN_BAR1 PCIR_BAR(1) /* DMA register map */
++#define HIFN_TRDY_TIMEOUT 0x40
++#define HIFN_RETRY_TIMEOUT 0x41
++
++/*
++ * PCI vendor and device identifiers
++ * (the names are preserved from their OpenBSD source).
++ */
++#define PCI_VENDOR_HIFN 0x13a3 /* Hifn */
++#define PCI_PRODUCT_HIFN_7751 0x0005 /* 7751 */
++#define PCI_PRODUCT_HIFN_6500 0x0006 /* 6500 */
++#define PCI_PRODUCT_HIFN_7811 0x0007 /* 7811 */
++#define PCI_PRODUCT_HIFN_7855 0x001f /* 7855 */
++#define PCI_PRODUCT_HIFN_7951 0x0012 /* 7951 */
++#define PCI_PRODUCT_HIFN_7955 0x0020 /* 7954/7955 */
++#define PCI_PRODUCT_HIFN_7956 0x001d /* 7956 */
++
++#define PCI_VENDOR_INVERTEX 0x14e1 /* Invertex */
++#define PCI_PRODUCT_INVERTEX_AEON 0x0005 /* AEON */
++
++#define PCI_VENDOR_NETSEC 0x1660 /* NetSec */
++#define PCI_PRODUCT_NETSEC_7751 0x7751 /* 7751 */
++
++/*
++ * The values below should multiple of 4 -- and be large enough to handle
++ * any command the driver implements.
++ *
++ * MAX_COMMAND = base command + mac command + encrypt command +
++ * mac-key + rc4-key
++ * MAX_RESULT = base result + mac result + mac + encrypt result
++ *
++ *
++ */
++#define HIFN_MAX_COMMAND (8 + 8 + 8 + 64 + 260)
++#define HIFN_MAX_RESULT (8 + 4 + 20 + 4)
++
++/*
++ * hifn_desc_t
++ *
++ * Holds an individual descriptor for any of the rings.
++ */
++typedef struct hifn_desc {
++ volatile u_int32_t l; /* length and status bits */
++ volatile u_int32_t p;
++} hifn_desc_t;
++
++/*
++ * Masks for the "length" field of struct hifn_desc.
++ */
++#define HIFN_D_LENGTH 0x0000ffff /* length bit mask */
++#define HIFN_D_MASKDONEIRQ 0x02000000 /* mask the done interrupt */
++#define HIFN_D_DESTOVER 0x04000000 /* destination overflow */
++#define HIFN_D_OVER 0x08000000 /* overflow */
++#define HIFN_D_LAST 0x20000000 /* last descriptor in chain */
++#define HIFN_D_JUMP 0x40000000 /* jump descriptor */
++#define HIFN_D_VALID 0x80000000 /* valid bit */
++
++
++/*
++ * Processing Unit Registers (offset from BASEREG0)
++ */
++#define HIFN_0_PUDATA 0x00 /* Processing Unit Data */
++#define HIFN_0_PUCTRL 0x04 /* Processing Unit Control */
++#define HIFN_0_PUISR 0x08 /* Processing Unit Interrupt Status */
++#define HIFN_0_PUCNFG 0x0c /* Processing Unit Configuration */
++#define HIFN_0_PUIER 0x10 /* Processing Unit Interrupt Enable */
++#define HIFN_0_PUSTAT 0x14 /* Processing Unit Status/Chip ID */
++#define HIFN_0_FIFOSTAT 0x18 /* FIFO Status */
++#define HIFN_0_FIFOCNFG 0x1c /* FIFO Configuration */
++#define HIFN_0_PUCTRL2 0x28 /* Processing Unit Control (2nd map) */
++#define HIFN_0_MUTE1 0x80
++#define HIFN_0_MUTE2 0x90
++#define HIFN_0_SPACESIZE 0x100 /* Register space size */
++
++/* Processing Unit Control Register (HIFN_0_PUCTRL) */
++#define HIFN_PUCTRL_CLRSRCFIFO 0x0010 /* clear source fifo */
++#define HIFN_PUCTRL_STOP 0x0008 /* stop pu */
++#define HIFN_PUCTRL_LOCKRAM 0x0004 /* lock ram */
++#define HIFN_PUCTRL_DMAENA 0x0002 /* enable dma */
++#define HIFN_PUCTRL_RESET 0x0001 /* Reset processing unit */
++
++/* Processing Unit Interrupt Status Register (HIFN_0_PUISR) */
++#define HIFN_PUISR_CMDINVAL 0x8000 /* Invalid command interrupt */
++#define HIFN_PUISR_DATAERR 0x4000 /* Data error interrupt */
++#define HIFN_PUISR_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
++#define HIFN_PUISR_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
++#define HIFN_PUISR_DSTOVER 0x0200 /* Destination overrun interrupt */
++#define HIFN_PUISR_SRCCMD 0x0080 /* Source command interrupt */
++#define HIFN_PUISR_SRCCTX 0x0040 /* Source context interrupt */
++#define HIFN_PUISR_SRCDATA 0x0020 /* Source data interrupt */
++#define HIFN_PUISR_DSTDATA 0x0010 /* Destination data interrupt */
++#define HIFN_PUISR_DSTRESULT 0x0004 /* Destination result interrupt */
++
++/* Processing Unit Configuration Register (HIFN_0_PUCNFG) */
++#define HIFN_PUCNFG_DRAMMASK 0xe000 /* DRAM size mask */
++#define HIFN_PUCNFG_DSZ_256K 0x0000 /* 256k dram */
++#define HIFN_PUCNFG_DSZ_512K 0x2000 /* 512k dram */
++#define HIFN_PUCNFG_DSZ_1M 0x4000 /* 1m dram */
++#define HIFN_PUCNFG_DSZ_2M 0x6000 /* 2m dram */
++#define HIFN_PUCNFG_DSZ_4M 0x8000 /* 4m dram */
++#define HIFN_PUCNFG_DSZ_8M 0xa000 /* 8m dram */
++#define HIFN_PUNCFG_DSZ_16M 0xc000 /* 16m dram */
++#define HIFN_PUCNFG_DSZ_32M 0xe000 /* 32m dram */
++#define HIFN_PUCNFG_DRAMREFRESH 0x1800 /* DRAM refresh rate mask */
++#define HIFN_PUCNFG_DRFR_512 0x0000 /* 512 divisor of ECLK */
++#define HIFN_PUCNFG_DRFR_256 0x0800 /* 256 divisor of ECLK */
++#define HIFN_PUCNFG_DRFR_128 0x1000 /* 128 divisor of ECLK */
++#define HIFN_PUCNFG_TCALLPHASES 0x0200 /* your guess is as good as mine... */
++#define HIFN_PUCNFG_TCDRVTOTEM 0x0100 /* your guess is as good as mine... */
++#define HIFN_PUCNFG_BIGENDIAN 0x0080 /* DMA big endian mode */
++#define HIFN_PUCNFG_BUS32 0x0040 /* Bus width 32bits */
++#define HIFN_PUCNFG_BUS16 0x0000 /* Bus width 16 bits */
++#define HIFN_PUCNFG_CHIPID 0x0020 /* Allow chipid from PUSTAT */
++#define HIFN_PUCNFG_DRAM 0x0010 /* Context RAM is DRAM */
++#define HIFN_PUCNFG_SRAM 0x0000 /* Context RAM is SRAM */
++#define HIFN_PUCNFG_COMPSING 0x0004 /* Enable single compression context */
++#define HIFN_PUCNFG_ENCCNFG 0x0002 /* Encryption configuration */
++
++/* Processing Unit Interrupt Enable Register (HIFN_0_PUIER) */
++#define HIFN_PUIER_CMDINVAL 0x8000 /* Invalid command interrupt */
++#define HIFN_PUIER_DATAERR 0x4000 /* Data error interrupt */
++#define HIFN_PUIER_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
++#define HIFN_PUIER_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
++#define HIFN_PUIER_DSTOVER 0x0200 /* Destination overrun interrupt */
++#define HIFN_PUIER_SRCCMD 0x0080 /* Source command interrupt */
++#define HIFN_PUIER_SRCCTX 0x0040 /* Source context interrupt */
++#define HIFN_PUIER_SRCDATA 0x0020 /* Source data interrupt */
++#define HIFN_PUIER_DSTDATA 0x0010 /* Destination data interrupt */
++#define HIFN_PUIER_DSTRESULT 0x0004 /* Destination result interrupt */
++
++/* Processing Unit Status Register/Chip ID (HIFN_0_PUSTAT) */
++#define HIFN_PUSTAT_CMDINVAL 0x8000 /* Invalid command interrupt */
++#define HIFN_PUSTAT_DATAERR 0x4000 /* Data error interrupt */
++#define HIFN_PUSTAT_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
++#define HIFN_PUSTAT_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
++#define HIFN_PUSTAT_DSTOVER 0x0200 /* Destination overrun interrupt */
++#define HIFN_PUSTAT_SRCCMD 0x0080 /* Source command interrupt */
++#define HIFN_PUSTAT_SRCCTX 0x0040 /* Source context interrupt */
++#define HIFN_PUSTAT_SRCDATA 0x0020 /* Source data interrupt */
++#define HIFN_PUSTAT_DSTDATA 0x0010 /* Destination data interrupt */
++#define HIFN_PUSTAT_DSTRESULT 0x0004 /* Destination result interrupt */
++#define HIFN_PUSTAT_CHIPREV 0x00ff /* Chip revision mask */
++#define HIFN_PUSTAT_CHIPENA 0xff00 /* Chip enabled mask */
++#define HIFN_PUSTAT_ENA_2 0x1100 /* Level 2 enabled */
++#define HIFN_PUSTAT_ENA_1 0x1000 /* Level 1 enabled */
++#define HIFN_PUSTAT_ENA_0 0x3000 /* Level 0 enabled */
++#define HIFN_PUSTAT_REV_2 0x0020 /* 7751 PT6/2 */
++#define HIFN_PUSTAT_REV_3 0x0030 /* 7751 PT6/3 */
++
++/* FIFO Status Register (HIFN_0_FIFOSTAT) */
++#define HIFN_FIFOSTAT_SRC 0x7f00 /* Source FIFO available */
++#define HIFN_FIFOSTAT_DST 0x007f /* Destination FIFO available */
++
++/* FIFO Configuration Register (HIFN_0_FIFOCNFG) */
++#define HIFN_FIFOCNFG_THRESHOLD 0x0400 /* must be written as this value */
++
++/*
++ * DMA Interface Registers (offset from BASEREG1)
++ */
++#define HIFN_1_DMA_CRAR 0x0c /* DMA Command Ring Address */
++#define HIFN_1_DMA_SRAR 0x1c /* DMA Source Ring Address */
++#define HIFN_1_DMA_RRAR 0x2c /* DMA Result Ring Address */
++#define HIFN_1_DMA_DRAR 0x3c /* DMA Destination Ring Address */
++#define HIFN_1_DMA_CSR 0x40 /* DMA Status and Control */
++#define HIFN_1_DMA_IER 0x44 /* DMA Interrupt Enable */
++#define HIFN_1_DMA_CNFG 0x48 /* DMA Configuration */
++#define HIFN_1_PLL 0x4c /* 7955/7956: PLL config */
++#define HIFN_1_7811_RNGENA 0x60 /* 7811: rng enable */
++#define HIFN_1_7811_RNGCFG 0x64 /* 7811: rng config */
++#define HIFN_1_7811_RNGDAT 0x68 /* 7811: rng data */
++#define HIFN_1_7811_RNGSTS 0x6c /* 7811: rng status */
++#define HIFN_1_DMA_CNFG2 0x6c /* 7955/7956: dma config #2 */
++#define HIFN_1_7811_MIPSRST 0x94 /* 7811: MIPS reset */
++#define HIFN_1_REVID 0x98 /* Revision ID */
++
++#define HIFN_1_PUB_RESET 0x204 /* Public/RNG Reset */
++#define HIFN_1_PUB_BASE 0x300 /* Public Base Address */
++#define HIFN_1_PUB_OPLEN 0x304 /* 7951-compat Public Operand Length */
++#define HIFN_1_PUB_OP 0x308 /* 7951-compat Public Operand */
++#define HIFN_1_PUB_STATUS 0x30c /* 7951-compat Public Status */
++#define HIFN_1_PUB_IEN 0x310 /* Public Interrupt enable */
++#define HIFN_1_RNG_CONFIG 0x314 /* RNG config */
++#define HIFN_1_RNG_DATA 0x318 /* RNG data */
++#define HIFN_1_PUB_MODE 0x320 /* PK mode */
++#define HIFN_1_PUB_FIFO_OPLEN 0x380 /* first element of oplen fifo */
++#define HIFN_1_PUB_FIFO_OP 0x384 /* first element of op fifo */
++#define HIFN_1_PUB_MEM 0x400 /* start of Public key memory */
++#define HIFN_1_PUB_MEMEND 0xbff /* end of Public key memory */
++
++/* DMA Status and Control Register (HIFN_1_DMA_CSR) */
++#define HIFN_DMACSR_D_CTRLMASK 0xc0000000 /* Destinition Ring Control */
++#define HIFN_DMACSR_D_CTRL_NOP 0x00000000 /* Dest. Control: no-op */
++#define HIFN_DMACSR_D_CTRL_DIS 0x40000000 /* Dest. Control: disable */
++#define HIFN_DMACSR_D_CTRL_ENA 0x80000000 /* Dest. Control: enable */
++#define HIFN_DMACSR_D_ABORT 0x20000000 /* Destinition Ring PCIAbort */
++#define HIFN_DMACSR_D_DONE 0x10000000 /* Destinition Ring Done */
++#define HIFN_DMACSR_D_LAST 0x08000000 /* Destinition Ring Last */
++#define HIFN_DMACSR_D_WAIT 0x04000000 /* Destinition Ring Waiting */
++#define HIFN_DMACSR_D_OVER 0x02000000 /* Destinition Ring Overflow */
++#define HIFN_DMACSR_R_CTRL 0x00c00000 /* Result Ring Control */
++#define HIFN_DMACSR_R_CTRL_NOP 0x00000000 /* Result Control: no-op */
++#define HIFN_DMACSR_R_CTRL_DIS 0x00400000 /* Result Control: disable */
++#define HIFN_DMACSR_R_CTRL_ENA 0x00800000 /* Result Control: enable */
++#define HIFN_DMACSR_R_ABORT 0x00200000 /* Result Ring PCI Abort */
++#define HIFN_DMACSR_R_DONE 0x00100000 /* Result Ring Done */
++#define HIFN_DMACSR_R_LAST 0x00080000 /* Result Ring Last */
++#define HIFN_DMACSR_R_WAIT 0x00040000 /* Result Ring Waiting */
++#define HIFN_DMACSR_R_OVER 0x00020000 /* Result Ring Overflow */
++#define HIFN_DMACSR_S_CTRL 0x0000c000 /* Source Ring Control */
++#define HIFN_DMACSR_S_CTRL_NOP 0x00000000 /* Source Control: no-op */
++#define HIFN_DMACSR_S_CTRL_DIS 0x00004000 /* Source Control: disable */
++#define HIFN_DMACSR_S_CTRL_ENA 0x00008000 /* Source Control: enable */
++#define HIFN_DMACSR_S_ABORT 0x00002000 /* Source Ring PCI Abort */
++#define HIFN_DMACSR_S_DONE 0x00001000 /* Source Ring Done */
++#define HIFN_DMACSR_S_LAST 0x00000800 /* Source Ring Last */
++#define HIFN_DMACSR_S_WAIT 0x00000400 /* Source Ring Waiting */
++#define HIFN_DMACSR_ILLW 0x00000200 /* Illegal write (7811 only) */
++#define HIFN_DMACSR_ILLR 0x00000100 /* Illegal read (7811 only) */
++#define HIFN_DMACSR_C_CTRL 0x000000c0 /* Command Ring Control */
++#define HIFN_DMACSR_C_CTRL_NOP 0x00000000 /* Command Control: no-op */
++#define HIFN_DMACSR_C_CTRL_DIS 0x00000040 /* Command Control: disable */
++#define HIFN_DMACSR_C_CTRL_ENA 0x00000080 /* Command Control: enable */
++#define HIFN_DMACSR_C_ABORT 0x00000020 /* Command Ring PCI Abort */
++#define HIFN_DMACSR_C_DONE 0x00000010 /* Command Ring Done */
++#define HIFN_DMACSR_C_LAST 0x00000008 /* Command Ring Last */
++#define HIFN_DMACSR_C_WAIT 0x00000004 /* Command Ring Waiting */
++#define HIFN_DMACSR_PUBDONE 0x00000002 /* Public op done (7951 only) */
++#define HIFN_DMACSR_ENGINE 0x00000001 /* Command Ring Engine IRQ */
++
++/* DMA Interrupt Enable Register (HIFN_1_DMA_IER) */
++#define HIFN_DMAIER_D_ABORT 0x20000000 /* Destination Ring PCIAbort */
++#define HIFN_DMAIER_D_DONE 0x10000000 /* Destination Ring Done */
++#define HIFN_DMAIER_D_LAST 0x08000000 /* Destination Ring Last */
++#define HIFN_DMAIER_D_WAIT 0x04000000 /* Destination Ring Waiting */
++#define HIFN_DMAIER_D_OVER 0x02000000 /* Destination Ring Overflow */
++#define HIFN_DMAIER_R_ABORT 0x00200000 /* Result Ring PCI Abort */
++#define HIFN_DMAIER_R_DONE 0x00100000 /* Result Ring Done */
++#define HIFN_DMAIER_R_LAST 0x00080000 /* Result Ring Last */
++#define HIFN_DMAIER_R_WAIT 0x00040000 /* Result Ring Waiting */
++#define HIFN_DMAIER_R_OVER 0x00020000 /* Result Ring Overflow */
++#define HIFN_DMAIER_S_ABORT 0x00002000 /* Source Ring PCI Abort */
++#define HIFN_DMAIER_S_DONE 0x00001000 /* Source Ring Done */
++#define HIFN_DMAIER_S_LAST 0x00000800 /* Source Ring Last */
++#define HIFN_DMAIER_S_WAIT 0x00000400 /* Source Ring Waiting */
++#define HIFN_DMAIER_ILLW 0x00000200 /* Illegal write (7811 only) */
++#define HIFN_DMAIER_ILLR 0x00000100 /* Illegal read (7811 only) */
++#define HIFN_DMAIER_C_ABORT 0x00000020 /* Command Ring PCI Abort */
++#define HIFN_DMAIER_C_DONE 0x00000010 /* Command Ring Done */
++#define HIFN_DMAIER_C_LAST 0x00000008 /* Command Ring Last */
++#define HIFN_DMAIER_C_WAIT 0x00000004 /* Command Ring Waiting */
++#define HIFN_DMAIER_PUBDONE 0x00000002 /* public op done (7951 only) */
++#define HIFN_DMAIER_ENGINE 0x00000001 /* Engine IRQ */
++
++/* DMA Configuration Register (HIFN_1_DMA_CNFG) */
++#define HIFN_DMACNFG_BIGENDIAN 0x10000000 /* big endian mode */
++#define HIFN_DMACNFG_POLLFREQ 0x00ff0000 /* Poll frequency mask */
++#define HIFN_DMACNFG_UNLOCK 0x00000800
++#define HIFN_DMACNFG_POLLINVAL 0x00000700 /* Invalid Poll Scalar */
++#define HIFN_DMACNFG_LAST 0x00000010 /* Host control LAST bit */
++#define HIFN_DMACNFG_MODE 0x00000004 /* DMA mode */
++#define HIFN_DMACNFG_DMARESET 0x00000002 /* DMA Reset # */
++#define HIFN_DMACNFG_MSTRESET 0x00000001 /* Master Reset # */
++
++/* DMA Configuration Register (HIFN_1_DMA_CNFG2) */
++#define HIFN_DMACNFG2_PKSWAP32 (1 << 19) /* swap the OPLEN/OP reg */
++#define HIFN_DMACNFG2_PKSWAP8 (1 << 18) /* swap the bits of OPLEN/OP */
++#define HIFN_DMACNFG2_BAR0_SWAP32 (1<<17) /* swap the bytes of BAR0 */
++#define HIFN_DMACNFG2_BAR1_SWAP8 (1<<16) /* swap the bits of BAR0 */
++#define HIFN_DMACNFG2_INIT_WRITE_BURST_SHIFT 12
++#define HIFN_DMACNFG2_INIT_READ_BURST_SHIFT 8
++#define HIFN_DMACNFG2_TGT_WRITE_BURST_SHIFT 4
++#define HIFN_DMACNFG2_TGT_READ_BURST_SHIFT 0
++
++/* 7811 RNG Enable Register (HIFN_1_7811_RNGENA) */
++#define HIFN_7811_RNGENA_ENA 0x00000001 /* enable RNG */
++
++/* 7811 RNG Config Register (HIFN_1_7811_RNGCFG) */
++#define HIFN_7811_RNGCFG_PRE1 0x00000f00 /* first prescalar */
++#define HIFN_7811_RNGCFG_OPRE 0x00000080 /* output prescalar */
++#define HIFN_7811_RNGCFG_DEFL 0x00000f80 /* 2 words/ 1/100 sec */
++
++/* 7811 RNG Status Register (HIFN_1_7811_RNGSTS) */
++#define HIFN_7811_RNGSTS_RDY 0x00004000 /* two numbers in FIFO */
++#define HIFN_7811_RNGSTS_UFL 0x00001000 /* rng underflow */
++
++/* 7811 MIPS Reset Register (HIFN_1_7811_MIPSRST) */
++#define HIFN_MIPSRST_BAR2SIZE 0xffff0000 /* sdram size */
++#define HIFN_MIPSRST_GPRAMINIT 0x00008000 /* gpram can be accessed */
++#define HIFN_MIPSRST_CRAMINIT 0x00004000 /* ctxram can be accessed */
++#define HIFN_MIPSRST_LED2 0x00000400 /* external LED2 */
++#define HIFN_MIPSRST_LED1 0x00000200 /* external LED1 */
++#define HIFN_MIPSRST_LED0 0x00000100 /* external LED0 */
++#define HIFN_MIPSRST_MIPSDIS 0x00000004 /* disable MIPS */
++#define HIFN_MIPSRST_MIPSRST 0x00000002 /* warm reset MIPS */
++#define HIFN_MIPSRST_MIPSCOLD 0x00000001 /* cold reset MIPS */
++
++/* Public key reset register (HIFN_1_PUB_RESET) */
++#define HIFN_PUBRST_RESET 0x00000001 /* reset public/rng unit */
++
++/* Public operation register (HIFN_1_PUB_OP) */
++#define HIFN_PUBOP_AOFFSET 0x0000003e /* A offset */
++#define HIFN_PUBOP_BOFFSET 0x00000fc0 /* B offset */
++#define HIFN_PUBOP_MOFFSET 0x0003f000 /* M offset */
++#define HIFN_PUBOP_OP_MASK 0x003c0000 /* Opcode: */
++#define HIFN_PUBOP_OP_NOP 0x00000000 /* NOP */
++#define HIFN_PUBOP_OP_ADD 0x00040000 /* ADD */
++#define HIFN_PUBOP_OP_ADDC 0x00080000 /* ADD w/carry */
++#define HIFN_PUBOP_OP_SUB 0x000c0000 /* SUB */
++#define HIFN_PUBOP_OP_SUBC 0x00100000 /* SUB w/carry */
++#define HIFN_PUBOP_OP_MODADD 0x00140000 /* Modular ADD */
++#define HIFN_PUBOP_OP_MODSUB 0x00180000 /* Modular SUB */
++#define HIFN_PUBOP_OP_INCA 0x001c0000 /* INC A */
++#define HIFN_PUBOP_OP_DECA 0x00200000 /* DEC A */
++#define HIFN_PUBOP_OP_MULT 0x00240000 /* MULT */
++#define HIFN_PUBOP_OP_MODMULT 0x00280000 /* Modular MULT */
++#define HIFN_PUBOP_OP_MODRED 0x002c0000 /* Modular Red */
++#define HIFN_PUBOP_OP_MODEXP 0x00300000 /* Modular Exp */
++
++/* Public operand length register (HIFN_1_PUB_OPLEN) */
++#define HIFN_PUBOPLEN_MODLEN 0x0000007f
++#define HIFN_PUBOPLEN_EXPLEN 0x0003ff80
++#define HIFN_PUBOPLEN_REDLEN 0x003c0000
++
++/* Public status register (HIFN_1_PUB_STATUS) */
++#define HIFN_PUBSTS_DONE 0x00000001 /* operation done */
++#define HIFN_PUBSTS_CARRY 0x00000002 /* carry */
++#define HIFN_PUBSTS_FIFO_EMPTY 0x00000100 /* fifo empty */
++#define HIFN_PUBSTS_FIFO_FULL 0x00000200 /* fifo full */
++#define HIFN_PUBSTS_FIFO_OVFL 0x00000400 /* fifo overflow */
++#define HIFN_PUBSTS_FIFO_WRITE 0x000f0000 /* fifo write */
++#define HIFN_PUBSTS_FIFO_READ 0x0f000000 /* fifo read */
++
++/* Public interrupt enable register (HIFN_1_PUB_IEN) */
++#define HIFN_PUBIEN_DONE 0x00000001 /* operation done interrupt */
++
++/* Random number generator config register (HIFN_1_RNG_CONFIG) */
++#define HIFN_RNGCFG_ENA 0x00000001 /* enable rng */
++
++/*
++ * Register offsets in register set 1
++ */
++
++#define HIFN_UNLOCK_SECRET1 0xf4
++#define HIFN_UNLOCK_SECRET2 0xfc
++
++/*
++ * PLL config register
++ *
++ * This register is present only on 7954/7955/7956 parts. It must be
++ * programmed according to the bus interface method used by the h/w.
++ * Note that the parts require a stable clock. Since the PCI clock
++ * may vary the reference clock must usually be used. To avoid
++ * overclocking the core logic, setup must be done carefully, refer
++ * to the driver for details. The exact multiplier required varies
++ * by part and system configuration; refer to the Hifn documentation.
++ */
++#define HIFN_PLL_REF_SEL 0x00000001 /* REF/HBI clk selection */
++#define HIFN_PLL_BP 0x00000002 /* bypass (used during setup) */
++/* bit 2 reserved */
++#define HIFN_PLL_PK_CLK_SEL 0x00000008 /* public key clk select */
++#define HIFN_PLL_PE_CLK_SEL 0x00000010 /* packet engine clk select */
++/* bits 5-9 reserved */
++#define HIFN_PLL_MBSET 0x00000400 /* must be set to 1 */
++#define HIFN_PLL_ND 0x00003800 /* Fpll_ref multiplier select */
++#define HIFN_PLL_ND_SHIFT 11
++#define HIFN_PLL_ND_2 0x00000000 /* 2x */
++#define HIFN_PLL_ND_4 0x00000800 /* 4x */
++#define HIFN_PLL_ND_6 0x00001000 /* 6x */
++#define HIFN_PLL_ND_8 0x00001800 /* 8x */
++#define HIFN_PLL_ND_10 0x00002000 /* 10x */
++#define HIFN_PLL_ND_12 0x00002800 /* 12x */
++/* bits 14-15 reserved */
++#define HIFN_PLL_IS 0x00010000 /* charge pump current select */
++/* bits 17-31 reserved */
++
++/*
++ * Board configuration specifies only these bits.
++ */
++#define HIFN_PLL_CONFIG (HIFN_PLL_IS|HIFN_PLL_ND|HIFN_PLL_REF_SEL)
++
++/*
++ * Public Key Engine Mode Register
++ */
++#define HIFN_PKMODE_HOSTINVERT (1 << 0) /* HOST INVERT */
++#define HIFN_PKMODE_ENHANCED (1 << 1) /* Enable enhanced mode */
++
++
++/*********************************************************************
++ * Structs for board commands
++ *
++ *********************************************************************/
++
++/*
++ * Structure to help build up the command data structure.
++ */
++typedef struct hifn_base_command {
++ volatile u_int16_t masks;
++ volatile u_int16_t session_num;
++ volatile u_int16_t total_source_count;
++ volatile u_int16_t total_dest_count;
++} hifn_base_command_t;
++
++#define HIFN_BASE_CMD_MAC 0x0400
++#define HIFN_BASE_CMD_CRYPT 0x0800
++#define HIFN_BASE_CMD_DECODE 0x2000
++#define HIFN_BASE_CMD_SRCLEN_M 0xc000
++#define HIFN_BASE_CMD_SRCLEN_S 14
++#define HIFN_BASE_CMD_DSTLEN_M 0x3000
++#define HIFN_BASE_CMD_DSTLEN_S 12
++#define HIFN_BASE_CMD_LENMASK_HI 0x30000
++#define HIFN_BASE_CMD_LENMASK_LO 0x0ffff
++
++/*
++ * Structure to help build up the command data structure.
++ */
++typedef struct hifn_crypt_command {
++ volatile u_int16_t masks;
++ volatile u_int16_t header_skip;
++ volatile u_int16_t source_count;
++ volatile u_int16_t reserved;
++} hifn_crypt_command_t;
++
++#define HIFN_CRYPT_CMD_ALG_MASK 0x0003 /* algorithm: */
++#define HIFN_CRYPT_CMD_ALG_DES 0x0000 /* DES */
++#define HIFN_CRYPT_CMD_ALG_3DES 0x0001 /* 3DES */
++#define HIFN_CRYPT_CMD_ALG_RC4 0x0002 /* RC4 */
++#define HIFN_CRYPT_CMD_ALG_AES 0x0003 /* AES */
++#define HIFN_CRYPT_CMD_MODE_MASK 0x0018 /* Encrypt mode: */
++#define HIFN_CRYPT_CMD_MODE_ECB 0x0000 /* ECB */
++#define HIFN_CRYPT_CMD_MODE_CBC 0x0008 /* CBC */
++#define HIFN_CRYPT_CMD_MODE_CFB 0x0010 /* CFB */
++#define HIFN_CRYPT_CMD_MODE_OFB 0x0018 /* OFB */
++#define HIFN_CRYPT_CMD_CLR_CTX 0x0040 /* clear context */
++#define HIFN_CRYPT_CMD_NEW_KEY 0x0800 /* expect new key */
++#define HIFN_CRYPT_CMD_NEW_IV 0x1000 /* expect new iv */
++
++#define HIFN_CRYPT_CMD_SRCLEN_M 0xc000
++#define HIFN_CRYPT_CMD_SRCLEN_S 14
++
++#define HIFN_CRYPT_CMD_KSZ_MASK 0x0600 /* AES key size: */
++#define HIFN_CRYPT_CMD_KSZ_128 0x0000 /* 128 bit */
++#define HIFN_CRYPT_CMD_KSZ_192 0x0200 /* 192 bit */
++#define HIFN_CRYPT_CMD_KSZ_256 0x0400 /* 256 bit */
++
++/*
++ * Structure to help build up the command data structure.
++ */
++typedef struct hifn_mac_command {
++ volatile u_int16_t masks;
++ volatile u_int16_t header_skip;
++ volatile u_int16_t source_count;
++ volatile u_int16_t reserved;
++} hifn_mac_command_t;
++
++#define HIFN_MAC_CMD_ALG_MASK 0x0001
++#define HIFN_MAC_CMD_ALG_SHA1 0x0000
++#define HIFN_MAC_CMD_ALG_MD5 0x0001
++#define HIFN_MAC_CMD_MODE_MASK 0x000c
++#define HIFN_MAC_CMD_MODE_HMAC 0x0000
++#define HIFN_MAC_CMD_MODE_SSL_MAC 0x0004
++#define HIFN_MAC_CMD_MODE_HASH 0x0008
++#define HIFN_MAC_CMD_MODE_FULL 0x0004
++#define HIFN_MAC_CMD_TRUNC 0x0010
++#define HIFN_MAC_CMD_RESULT 0x0020
++#define HIFN_MAC_CMD_APPEND 0x0040
++#define HIFN_MAC_CMD_SRCLEN_M 0xc000
++#define HIFN_MAC_CMD_SRCLEN_S 14
++
++/*
++ * MAC POS IPsec initiates authentication after encryption on encodes
++ * and before decryption on decodes.
++ */
++#define HIFN_MAC_CMD_POS_IPSEC 0x0200
++#define HIFN_MAC_CMD_NEW_KEY 0x0800
++
++/*
++ * The poll frequency and poll scalar defines are unshifted values used
++ * to set fields in the DMA Configuration Register.
++ */
++#ifndef HIFN_POLL_FREQUENCY
++#define HIFN_POLL_FREQUENCY 0x1
++#endif
++
++#ifndef HIFN_POLL_SCALAR
++#define HIFN_POLL_SCALAR 0x0
++#endif
++
++#define HIFN_MAX_SEGLEN 0xffff /* maximum dma segment len */
++#define HIFN_MAX_DMALEN 0x3ffff /* maximum dma length */
++#endif /* __HIFN_H__ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifn7751var.h linux-2.6.30/crypto/ocf/hifn/hifn7751var.h
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifn7751var.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifn7751var.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,369 @@
++/* $FreeBSD: src/sys/dev/hifn/hifn7751var.h,v 1.9 2007/03/21 03:42:49 sam Exp $ */
++/* $OpenBSD: hifn7751var.h,v 1.42 2002/04/08 17:49:42 jason Exp $ */
++
++/*-
++ * Invertex AEON / Hifn 7751 driver
++ * Copyright (c) 1999 Invertex Inc. All rights reserved.
++ * Copyright (c) 1999 Theo de Raadt
++ * Copyright (c) 2000-2001 Network Security Technologies, Inc.
++ * http://www.netsec.net
++ *
++ * Please send any comments, feedback, bug-fixes, or feature requests to
++ * software@invertex.com.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored in part by the Defense Advanced Research Projects
++ * Agency (DARPA) and Air Force Research Laboratory, Air Force
++ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
++ *
++ */
++
++#ifndef __HIFN7751VAR_H__
++#define __HIFN7751VAR_H__
++
++#ifdef __KERNEL__
++
++/*
++ * Some configurable values for the driver. By default command+result
++ * descriptor rings are the same size. The src+dst descriptor rings
++ * are sized at 3.5x the number of potential commands. Slower parts
++ * (e.g. 7951) tend to run out of src descriptors; faster parts (7811)
++ * src+cmd/result descriptors. It's not clear that increasing the size
++ * of the descriptor rings helps performance significantly as other
++ * factors tend to come into play (e.g. copying misaligned packets).
++ */
++#define HIFN_D_CMD_RSIZE 24 /* command descriptors */
++#define HIFN_D_SRC_RSIZE ((HIFN_D_CMD_RSIZE * 7) / 2) /* source descriptors */
++#define HIFN_D_RES_RSIZE HIFN_D_CMD_RSIZE /* result descriptors */
++#define HIFN_D_DST_RSIZE HIFN_D_SRC_RSIZE /* destination descriptors */
++
++/*
++ * Length values for cryptography
++ */
++#define HIFN_DES_KEY_LENGTH 8
++#define HIFN_3DES_KEY_LENGTH 24
++#define HIFN_MAX_CRYPT_KEY_LENGTH HIFN_3DES_KEY_LENGTH
++#define HIFN_IV_LENGTH 8
++#define HIFN_AES_IV_LENGTH 16
++#define HIFN_MAX_IV_LENGTH HIFN_AES_IV_LENGTH
++
++/*
++ * Length values for authentication
++ */
++#define HIFN_MAC_KEY_LENGTH 64
++#define HIFN_MD5_LENGTH 16
++#define HIFN_SHA1_LENGTH 20
++#define HIFN_MAC_TRUNC_LENGTH 12
++
++#define MAX_SCATTER 64
++
++/*
++ * Data structure to hold all 4 rings and any other ring related data.
++ */
++struct hifn_dma {
++ /*
++ * Descriptor rings. We add +1 to the size to accomidate the
++ * jump descriptor.
++ */
++ struct hifn_desc cmdr[HIFN_D_CMD_RSIZE+1];
++ struct hifn_desc srcr[HIFN_D_SRC_RSIZE+1];
++ struct hifn_desc dstr[HIFN_D_DST_RSIZE+1];
++ struct hifn_desc resr[HIFN_D_RES_RSIZE+1];
++
++ struct hifn_command *hifn_commands[HIFN_D_RES_RSIZE];
++
++ u_char command_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_COMMAND];
++ u_char result_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_RESULT];
++ u_int32_t slop[HIFN_D_CMD_RSIZE];
++
++ u_int64_t test_src, test_dst;
++
++ /*
++ * Our current positions for insertion and removal from the desriptor
++ * rings.
++ */
++ int cmdi, srci, dsti, resi;
++ volatile int cmdu, srcu, dstu, resu;
++ int cmdk, srck, dstk, resk;
++};
++
++struct hifn_session {
++ int hs_used;
++ int hs_mlen;
++ u_int8_t hs_iv[HIFN_MAX_IV_LENGTH];
++};
++
++#define HIFN_RING_SYNC(sc, r, i, f) \
++ /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
++
++#define HIFN_CMDR_SYNC(sc, i, f) HIFN_RING_SYNC((sc), cmdr, (i), (f))
++#define HIFN_RESR_SYNC(sc, i, f) HIFN_RING_SYNC((sc), resr, (i), (f))
++#define HIFN_SRCR_SYNC(sc, i, f) HIFN_RING_SYNC((sc), srcr, (i), (f))
++#define HIFN_DSTR_SYNC(sc, i, f) HIFN_RING_SYNC((sc), dstr, (i), (f))
++
++#define HIFN_CMD_SYNC(sc, i, f) \
++ /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
++
++#define HIFN_RES_SYNC(sc, i, f) \
++ /* DAVIDM bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f)) */
++
++typedef int bus_size_t;
++
++/*
++ * Holds data specific to a single HIFN board.
++ */
++struct hifn_softc {
++ softc_device_decl sc_dev;
++
++ struct pci_dev *sc_pcidev; /* PCI device pointer */
++ spinlock_t sc_mtx; /* per-instance lock */
++
++ int sc_num; /* for multiple devs */
++
++ ocf_iomem_t sc_bar0;
++ bus_size_t sc_bar0_lastreg;/* bar0 last reg written */
++ ocf_iomem_t sc_bar1;
++ bus_size_t sc_bar1_lastreg;/* bar1 last reg written */
++
++ int sc_irq;
++
++ u_int32_t sc_dmaier;
++ u_int32_t sc_drammodel; /* 1=dram, 0=sram */
++ u_int32_t sc_pllconfig; /* 7954/7955/7956 PLL config */
++
++ struct hifn_dma *sc_dma;
++ dma_addr_t sc_dma_physaddr;/* physical address of sc_dma */
++
++ int sc_dmansegs;
++ int32_t sc_cid;
++ int sc_maxses;
++ int sc_nsessions;
++ struct hifn_session *sc_sessions;
++ int sc_ramsize;
++ int sc_flags;
++#define HIFN_HAS_RNG 0x1 /* includes random number generator */
++#define HIFN_HAS_PUBLIC 0x2 /* includes public key support */
++#define HIFN_HAS_AES 0x4 /* includes AES support */
++#define HIFN_IS_7811 0x8 /* Hifn 7811 part */
++#define HIFN_IS_7956 0x10 /* Hifn 7956/7955 don't have SDRAM */
++
++ struct timer_list sc_tickto; /* for managing DMA */
++
++ int sc_rngfirst;
++ int sc_rnghz; /* RNG polling frequency */
++
++ int sc_c_busy; /* command ring busy */
++ int sc_s_busy; /* source data ring busy */
++ int sc_d_busy; /* destination data ring busy */
++ int sc_r_busy; /* result ring busy */
++ int sc_active; /* for initial countdown */
++ int sc_needwakeup; /* ops q'd wating on resources */
++ int sc_curbatch; /* # ops submitted w/o int */
++ int sc_suspended;
++#ifdef HIFN_VULCANDEV
++ struct cdev *sc_pkdev;
++#endif
++};
++
++#define HIFN_LOCK(_sc) spin_lock_irqsave(&(_sc)->sc_mtx, l_flags)
++#define HIFN_UNLOCK(_sc) spin_unlock_irqrestore(&(_sc)->sc_mtx, l_flags)
++
++/*
++ * hifn_command_t
++ *
++ * This is the control structure used to pass commands to hifn_encrypt().
++ *
++ * flags
++ * -----
++ * Flags is the bitwise "or" values for command configuration. A single
++ * encrypt direction needs to be set:
++ *
++ * HIFN_ENCODE or HIFN_DECODE
++ *
++ * To use cryptography, a single crypto algorithm must be included:
++ *
++ * HIFN_CRYPT_3DES or HIFN_CRYPT_DES
++ *
++ * To use authentication is used, a single MAC algorithm must be included:
++ *
++ * HIFN_MAC_MD5 or HIFN_MAC_SHA1
++ *
++ * By default MD5 uses a 16 byte hash and SHA-1 uses a 20 byte hash.
++ * If the value below is set, hash values are truncated or assumed
++ * truncated to 12 bytes:
++ *
++ * HIFN_MAC_TRUNC
++ *
++ * Keys for encryption and authentication can be sent as part of a command,
++ * or the last key value used with a particular session can be retrieved
++ * and used again if either of these flags are not specified.
++ *
++ * HIFN_CRYPT_NEW_KEY, HIFN_MAC_NEW_KEY
++ *
++ * session_num
++ * -----------
++ * A number between 0 and 2048 (for DRAM models) or a number between
++ * 0 and 768 (for SRAM models). Those who don't want to use session
++ * numbers should leave value at zero and send a new crypt key and/or
++ * new MAC key on every command. If you use session numbers and
++ * don't send a key with a command, the last key sent for that same
++ * session number will be used.
++ *
++ * Warning: Using session numbers and multiboard at the same time
++ * is currently broken.
++ *
++ * mbuf
++ * ----
++ * Either fill in the mbuf pointer and npa=0 or
++ * fill packp[] and packl[] and set npa to > 0
++ *
++ * mac_header_skip
++ * ---------------
++ * The number of bytes of the source_buf that are skipped over before
++ * authentication begins. This must be a number between 0 and 2^16-1
++ * and can be used by IPsec implementers to skip over IP headers.
++ * *** Value ignored if authentication not used ***
++ *
++ * crypt_header_skip
++ * -----------------
++ * The number of bytes of the source_buf that are skipped over before
++ * the cryptographic operation begins. This must be a number between 0
++ * and 2^16-1. For IPsec, this number will always be 8 bytes larger
++ * than the auth_header_skip (to skip over the ESP header).
++ * *** Value ignored if cryptography not used ***
++ *
++ */
++struct hifn_operand {
++ union {
++ struct sk_buff *skb;
++ struct uio *io;
++ unsigned char *buf;
++ } u;
++ void *map;
++ bus_size_t mapsize;
++ int nsegs;
++ struct {
++ dma_addr_t ds_addr;
++ int ds_len;
++ } segs[MAX_SCATTER];
++};
++
++struct hifn_command {
++ u_int16_t session_num;
++ u_int16_t base_masks, cry_masks, mac_masks;
++ u_int8_t iv[HIFN_MAX_IV_LENGTH], *ck, mac[HIFN_MAC_KEY_LENGTH];
++ int cklen;
++ int sloplen, slopidx;
++
++ struct hifn_operand src;
++ struct hifn_operand dst;
++
++ struct hifn_softc *softc;
++ struct cryptop *crp;
++ struct cryptodesc *enccrd, *maccrd;
++};
++
++#define src_skb src.u.skb
++#define src_io src.u.io
++#define src_map src.map
++#define src_mapsize src.mapsize
++#define src_segs src.segs
++#define src_nsegs src.nsegs
++#define src_buf src.u.buf
++
++#define dst_skb dst.u.skb
++#define dst_io dst.u.io
++#define dst_map dst.map
++#define dst_mapsize dst.mapsize
++#define dst_segs dst.segs
++#define dst_nsegs dst.nsegs
++#define dst_buf dst.u.buf
++
++/*
++ * Return values for hifn_crypto()
++ */
++#define HIFN_CRYPTO_SUCCESS 0
++#define HIFN_CRYPTO_BAD_INPUT (-1)
++#define HIFN_CRYPTO_RINGS_FULL (-2)
++
++/**************************************************************************
++ *
++ * Function: hifn_crypto
++ *
++ * Purpose: Called by external drivers to begin an encryption on the
++ * HIFN board.
++ *
++ * Blocking/Non-blocking Issues
++ * ============================
++ * The driver cannot block in hifn_crypto (no calls to tsleep) currently.
++ * hifn_crypto() returns HIFN_CRYPTO_RINGS_FULL if there is not enough
++ * room in any of the rings for the request to proceed.
++ *
++ * Return Values
++ * =============
++ * 0 for success, negative values on error
++ *
++ * Defines for negative error codes are:
++ *
++ * HIFN_CRYPTO_BAD_INPUT : The passed in command had invalid settings.
++ * HIFN_CRYPTO_RINGS_FULL : All DMA rings were full and non-blocking
++ * behaviour was requested.
++ *
++ *************************************************************************/
++
++/*
++ * Convert back and forth from 'sid' to 'card' and 'session'
++ */
++#define HIFN_CARD(sid) (((sid) & 0xf0000000) >> 28)
++#define HIFN_SESSION(sid) ((sid) & 0x000007ff)
++#define HIFN_SID(crd,ses) (((crd) << 28) | ((ses) & 0x7ff))
++
++#endif /* _KERNEL */
++
++struct hifn_stats {
++ u_int64_t hst_ibytes;
++ u_int64_t hst_obytes;
++ u_int32_t hst_ipackets;
++ u_int32_t hst_opackets;
++ u_int32_t hst_invalid;
++ u_int32_t hst_nomem; /* malloc or one of hst_nomem_* */
++ u_int32_t hst_abort;
++ u_int32_t hst_noirq; /* IRQ for no reason */
++ u_int32_t hst_totbatch; /* ops submitted w/o interrupt */
++ u_int32_t hst_maxbatch; /* max ops submitted together */
++ u_int32_t hst_unaligned; /* unaligned src caused copy */
++ /*
++ * The following divides hst_nomem into more specific buckets.
++ */
++ u_int32_t hst_nomem_map; /* bus_dmamap_create failed */
++ u_int32_t hst_nomem_load; /* bus_dmamap_load_* failed */
++ u_int32_t hst_nomem_mbuf; /* MGET* failed */
++ u_int32_t hst_nomem_mcl; /* MCLGET* failed */
++ u_int32_t hst_nomem_cr; /* out of command/result descriptor */
++ u_int32_t hst_nomem_sd; /* out of src/dst descriptors */
++};
++
++#endif /* __HIFN7751VAR_H__ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPP.c linux-2.6.30/crypto/ocf/hifn/hifnHIPP.c
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPP.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifnHIPP.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,420 @@
++/*-
++ * Driver for Hifn HIPP-I/II chipset
++ * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com>
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored by Hifn Inc.
++ *
++ */
++
++/*
++ * Driver for various Hifn encryption processors.
++ */
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/random.h>
++#include <linux/version.h>
++#include <linux/skbuff.h>
++#include <linux/uio.h>
++#include <linux/sysfs.h>
++#include <linux/miscdevice.h>
++#include <asm/io.h>
++
++#include <cryptodev.h>
++
++#include "hifnHIPPreg.h"
++#include "hifnHIPPvar.h"
++
++#if 1
++#define DPRINTF(a...) if (hipp_debug) { \
++ printk("%s: ", sc ? \
++ device_get_nameunit(sc->sc_dev) : "hifn"); \
++ printk(a); \
++ } else
++#else
++#define DPRINTF(a...)
++#endif
++
++typedef int bus_size_t;
++
++static inline int
++pci_get_revid(struct pci_dev *dev)
++{
++ u8 rid = 0;
++ pci_read_config_byte(dev, PCI_REVISION_ID, &rid);
++ return rid;
++}
++
++#define debug hipp_debug
++int hipp_debug = 0;
++module_param(hipp_debug, int, 0644);
++MODULE_PARM_DESC(hipp_debug, "Enable debug");
++
++int hipp_maxbatch = 1;
++module_param(hipp_maxbatch, int, 0644);
++MODULE_PARM_DESC(hipp_maxbatch, "max ops to batch w/o interrupt");
++
++static int hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent);
++static void hipp_remove(struct pci_dev *dev);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++static irqreturn_t hipp_intr(int irq, void *arg);
++#else
++static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs);
++#endif
++
++static int hipp_num_chips = 0;
++static struct hipp_softc *hipp_chip_idx[HIPP_MAX_CHIPS];
++
++static int hipp_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int hipp_freesession(device_t, u_int64_t);
++static int hipp_process(device_t, struct cryptop *, int);
++
++static device_method_t hipp_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, hipp_newsession),
++ DEVMETHOD(cryptodev_freesession,hipp_freesession),
++ DEVMETHOD(cryptodev_process, hipp_process),
++};
++
++static __inline u_int32_t
++READ_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg)
++{
++ u_int32_t v = readl(sc->sc_bar[barno] + reg);
++ //sc->sc_bar0_lastreg = (bus_size_t) -1;
++ return (v);
++}
++static __inline void
++WRITE_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg, u_int32_t val)
++{
++ writel(val, sc->sc_bar[barno] + reg);
++}
++
++#define READ_REG_0(sc, reg) READ_REG(sc, 0, reg)
++#define WRITE_REG_0(sc, reg, val) WRITE_REG(sc,0, reg, val)
++#define READ_REG_1(sc, reg) READ_REG(sc, 1, reg)
++#define WRITE_REG_1(sc, reg, val) WRITE_REG(sc,1, reg, val)
++
++static int
++hipp_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
++{
++ return EINVAL;
++}
++
++static int
++hipp_freesession(device_t dev, u_int64_t tid)
++{
++ return EINVAL;
++}
++
++static int
++hipp_process(device_t dev, struct cryptop *crp, int hint)
++{
++ return EINVAL;
++}
++
++static const char*
++hipp_partname(struct hipp_softc *sc, char buf[128], size_t blen)
++{
++ char *n = NULL;
++
++ switch (pci_get_vendor(sc->sc_pcidev)) {
++ case PCI_VENDOR_HIFN:
++ switch (pci_get_device(sc->sc_pcidev)) {
++ case PCI_PRODUCT_HIFN_7855: n = "Hifn 7855";
++ case PCI_PRODUCT_HIFN_8155: n = "Hifn 8155";
++ case PCI_PRODUCT_HIFN_6500: n = "Hifn 6500";
++ }
++ }
++
++ if(n==NULL) {
++ snprintf(buf, blen, "VID=%02x,PID=%02x",
++ pci_get_vendor(sc->sc_pcidev),
++ pci_get_device(sc->sc_pcidev));
++ } else {
++ buf[0]='\0';
++ strncat(buf, n, blen);
++ }
++ return buf;
++}
++
++struct hipp_fs_entry {
++ struct attribute attr;
++ /* other stuff */
++};
++
++
++static ssize_t
++cryptoid_show(struct device *dev,
++ struct device_attribute *attr,
++ char *buf)
++{
++ struct hipp_softc *sc;
++
++ sc = pci_get_drvdata(to_pci_dev (dev));
++ return sprintf (buf, "%d\n", sc->sc_cid);
++}
++
++struct device_attribute hipp_dev_cryptoid = __ATTR_RO(cryptoid);
++
++/*
++ * Attach an interface that successfully probed.
++ */
++static int
++hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent)
++{
++ struct hipp_softc *sc = NULL;
++ int i;
++ //char rbase;
++ //u_int16_t ena;
++ int rev;
++ //int rseg;
++ int rc;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (pci_enable_device(dev) < 0)
++ return(-ENODEV);
++
++ if (pci_set_mwi(dev))
++ return(-ENODEV);
++
++ if (!dev->irq) {
++ printk("hifn: found device with no IRQ assigned. check BIOS settings!");
++ pci_disable_device(dev);
++ return(-ENODEV);
++ }
++
++ sc = (struct hipp_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
++ if (!sc)
++ return(-ENOMEM);
++ memset(sc, 0, sizeof(*sc));
++
++ softc_device_init(sc, "hifn-hipp", hipp_num_chips, hipp_methods);
++
++ sc->sc_pcidev = dev;
++ sc->sc_irq = -1;
++ sc->sc_cid = -1;
++ sc->sc_num = hipp_num_chips++;
++
++ if (sc->sc_num < HIPP_MAX_CHIPS)
++ hipp_chip_idx[sc->sc_num] = sc;
++
++ pci_set_drvdata(sc->sc_pcidev, sc);
++
++ spin_lock_init(&sc->sc_mtx);
++
++ /*
++ * Setup PCI resources.
++ * The READ_REG_0, WRITE_REG_0, READ_REG_1,
++ * and WRITE_REG_1 macros throughout the driver are used
++ * to permit better debugging.
++ */
++ for(i=0; i<4; i++) {
++ unsigned long mem_start, mem_len;
++ mem_start = pci_resource_start(sc->sc_pcidev, i);
++ mem_len = pci_resource_len(sc->sc_pcidev, i);
++ sc->sc_barphy[i] = (caddr_t)mem_start;
++ sc->sc_bar[i] = (ocf_iomem_t) ioremap(mem_start, mem_len);
++ if (!sc->sc_bar[i]) {
++ device_printf(sc->sc_dev, "cannot map bar%d register space\n", i);
++ goto fail;
++ }
++ }
++
++ //hipp_reset_board(sc, 0);
++ pci_set_master(sc->sc_pcidev);
++
++ /*
++ * Arrange the interrupt line.
++ */
++ rc = request_irq(dev->irq, hipp_intr, IRQF_SHARED, "hifn", sc);
++ if (rc) {
++ device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc);
++ goto fail;
++ }
++ sc->sc_irq = dev->irq;
++
++ rev = READ_REG_1(sc, HIPP_1_REVID) & 0xffff;
++
++ {
++ char b[32];
++ device_printf(sc->sc_dev, "%s, rev %u",
++ hipp_partname(sc, b, sizeof(b)), rev);
++ }
++
++#if 0
++ if (sc->sc_flags & HIFN_IS_7956)
++ printf(", pll=0x%x<%s clk, %ux mult>",
++ sc->sc_pllconfig,
++ sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci",
++ 2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11));
++#endif
++ printf("\n");
++
++ sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
++ if (sc->sc_cid < 0) {
++ device_printf(sc->sc_dev, "could not get crypto driver id\n");
++ goto fail;
++ }
++
++#if 0 /* cannot work with a non-GPL module */
++ /* make a sysfs entry to let the world know what entry we got */
++ sysfs_create_file(&sc->sc_pcidev->dev.kobj, &hipp_dev_cryptoid.attr);
++#endif
++
++#if 0
++ init_timer(&sc->sc_tickto);
++ sc->sc_tickto.function = hifn_tick;
++ sc->sc_tickto.data = (unsigned long) sc->sc_num;
++ mod_timer(&sc->sc_tickto, jiffies + HZ);
++#endif
++
++#if 0 /* no code here yet ?? */
++ crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
++#endif
++
++ return (0);
++
++fail:
++ if (sc->sc_cid >= 0)
++ crypto_unregister_all(sc->sc_cid);
++ if (sc->sc_irq != -1)
++ free_irq(sc->sc_irq, sc);
++
++#if 0
++ if (sc->sc_dma) {
++ /* Turn off DMA polling */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++
++ pci_free_consistent(sc->sc_pcidev,
++ sizeof(*sc->sc_dma),
++ sc->sc_dma, sc->sc_dma_physaddr);
++ }
++#endif
++ kfree(sc);
++ return (-ENXIO);
++}
++
++/*
++ * Detach an interface that successfully probed.
++ */
++static void
++hipp_remove(struct pci_dev *dev)
++{
++ struct hipp_softc *sc = pci_get_drvdata(dev);
++ unsigned long l_flags;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /* disable interrupts */
++ HIPP_LOCK(sc);
++
++#if 0
++ WRITE_REG_1(sc, HIFN_1_DMA_IER, 0);
++ HIFN_UNLOCK(sc);
++
++ /*XXX other resources */
++ del_timer_sync(&sc->sc_tickto);
++
++ /* Turn off DMA polling */
++ WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
++ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
++#endif
++
++ crypto_unregister_all(sc->sc_cid);
++
++ free_irq(sc->sc_irq, sc);
++
++#if 0
++ pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma),
++ sc->sc_dma, sc->sc_dma_physaddr);
++#endif
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++static irqreturn_t hipp_intr(int irq, void *arg)
++#else
++static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs)
++#endif
++{
++ struct hipp_softc *sc = arg;
++
++ sc = sc; /* shut up compiler */
++
++ return IRQ_HANDLED;
++}
++
++static struct pci_device_id hipp_pci_tbl[] = {
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7855,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_8155,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++};
++MODULE_DEVICE_TABLE(pci, hipp_pci_tbl);
++
++static struct pci_driver hipp_driver = {
++ .name = "hipp",
++ .id_table = hipp_pci_tbl,
++ .probe = hipp_probe,
++ .remove = hipp_remove,
++ /* add PM stuff here one day */
++};
++
++static int __init hipp_init (void)
++{
++ struct hipp_softc *sc = NULL;
++ int rc;
++
++ DPRINTF("%s(%p)\n", __FUNCTION__, hipp_init);
++
++ rc = pci_register_driver(&hipp_driver);
++ pci_register_driver_compat(&hipp_driver, rc);
++
++ return rc;
++}
++
++static void __exit hipp_exit (void)
++{
++ pci_unregister_driver(&hipp_driver);
++}
++
++module_init(hipp_init);
++module_exit(hipp_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("Michael Richardson <mcr@xelerance.com>");
++MODULE_DESCRIPTION("OCF driver for hifn HIPP-I/II PCI crypto devices");
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPPreg.h linux-2.6.30/crypto/ocf/hifn/hifnHIPPreg.h
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPPreg.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifnHIPPreg.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,46 @@
++/*-
++ * Hifn HIPP-I/HIPP-II (7855/8155) driver.
++ * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com>
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored by Hifn inc.
++ *
++ */
++
++#ifndef __HIFNHIPP_H__
++#define __HIFNHIPP_H__
++
++/*
++ * PCI vendor and device identifiers
++ */
++#define PCI_VENDOR_HIFN 0x13a3 /* Hifn */
++#define PCI_PRODUCT_HIFN_6500 0x0006 /* 6500 */
++#define PCI_PRODUCT_HIFN_7855 0x001f /* 7855 */
++#define PCI_PRODUCT_HIFN_8155 0x999 /* XXX 8155 */
++
++#define HIPP_1_REVID 0x01 /* BOGUS */
++
++#endif /* __HIPP_H__ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPPvar.h linux-2.6.30/crypto/ocf/hifn/hifnHIPPvar.h
+--- linux-2.6.30.orig/crypto/ocf/hifn/hifnHIPPvar.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/hifnHIPPvar.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,93 @@
++/*
++ * Hifn HIPP-I/HIPP-II (7855/8155) driver.
++ * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com> *
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * Effort sponsored by Hifn inc.
++ *
++ */
++
++#ifndef __HIFNHIPPVAR_H__
++#define __HIFNHIPPVAR_H__
++
++#define HIPP_MAX_CHIPS 8
++
++/*
++ * Holds data specific to a single Hifn HIPP-I board.
++ */
++struct hipp_softc {
++ softc_device_decl sc_dev;
++
++ struct pci_dev *sc_pcidev; /* device backpointer */
++ ocf_iomem_t sc_bar[5];
++ caddr_t sc_barphy[5]; /* physical address */
++ int sc_num; /* for multiple devs */
++ spinlock_t sc_mtx; /* per-instance lock */
++ int32_t sc_cid;
++ int sc_irq;
++
++#if 0
++
++ u_int32_t sc_dmaier;
++ u_int32_t sc_drammodel; /* 1=dram, 0=sram */
++ u_int32_t sc_pllconfig; /* 7954/7955/7956 PLL config */
++
++ struct hifn_dma *sc_dma;
++ dma_addr_t sc_dma_physaddr;/* physical address of sc_dma */
++
++ int sc_dmansegs;
++ int sc_maxses;
++ int sc_nsessions;
++ struct hifn_session *sc_sessions;
++ int sc_ramsize;
++ int sc_flags;
++#define HIFN_HAS_RNG 0x1 /* includes random number generator */
++#define HIFN_HAS_PUBLIC 0x2 /* includes public key support */
++#define HIFN_HAS_AES 0x4 /* includes AES support */
++#define HIFN_IS_7811 0x8 /* Hifn 7811 part */
++#define HIFN_IS_7956 0x10 /* Hifn 7956/7955 don't have SDRAM */
++
++ struct timer_list sc_tickto; /* for managing DMA */
++
++ int sc_rngfirst;
++ int sc_rnghz; /* RNG polling frequency */
++
++ int sc_c_busy; /* command ring busy */
++ int sc_s_busy; /* source data ring busy */
++ int sc_d_busy; /* destination data ring busy */
++ int sc_r_busy; /* result ring busy */
++ int sc_active; /* for initial countdown */
++ int sc_needwakeup; /* ops q'd wating on resources */
++ int sc_curbatch; /* # ops submitted w/o int */
++ int sc_suspended;
++ struct miscdevice sc_miscdev;
++#endif
++};
++
++#define HIPP_LOCK(_sc) spin_lock_irqsave(&(_sc)->sc_mtx, l_flags)
++#define HIPP_UNLOCK(_sc) spin_unlock_irqrestore(&(_sc)->sc_mtx, l_flags)
++
++#endif /* __HIFNHIPPVAR_H__ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/hifn/Makefile linux-2.6.30/crypto/ocf/hifn/Makefile
+--- linux-2.6.30.orig/crypto/ocf/hifn/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/hifn/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,13 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++obj-$(CONFIG_OCF_HIFN) += hifn7751.o
++obj-$(CONFIG_OCF_HIFNHIPP) += hifnHIPP.o
++
++obj ?= .
++EXTRA_CFLAGS += -I$(obj)/.. -I$(obj)/
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/ixp4xx/ixp4xx.c linux-2.6.30/crypto/ocf/ixp4xx/ixp4xx.c
+--- linux-2.6.30.orig/crypto/ocf/ixp4xx/ixp4xx.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ixp4xx/ixp4xx.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1328 @@
++/*
++ * An OCF module that uses Intels IXP CryptACC API to do the crypto.
++ * This driver requires the IXP400 Access Library that is available
++ * from Intel in order to operate (or compile).
++ *
++ * Written by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/sched.h>
++#include <linux/wait.h>
++#include <linux/crypto.h>
++#include <linux/interrupt.h>
++#include <asm/scatterlist.h>
++
++#include <IxTypes.h>
++#include <IxOsBuffMgt.h>
++#include <IxNpeDl.h>
++#include <IxCryptoAcc.h>
++#include <IxQMgr.h>
++#include <IxOsServices.h>
++#include <IxOsCacheMMU.h>
++
++#include <cryptodev.h>
++#include <uio.h>
++
++#ifndef IX_MBUF_PRIV
++#define IX_MBUF_PRIV(x) ((x)->priv)
++#endif
++
++struct ixp_data;
++
++struct ixp_q {
++ struct list_head ixp_q_list;
++ struct ixp_data *ixp_q_data;
++ struct cryptop *ixp_q_crp;
++ struct cryptodesc *ixp_q_ccrd;
++ struct cryptodesc *ixp_q_acrd;
++ IX_MBUF ixp_q_mbuf;
++ UINT8 *ixp_hash_dest; /* Location for hash in client buffer */
++ UINT8 *ixp_hash_src; /* Location of hash in internal buffer */
++ unsigned char ixp_q_iv_data[IX_CRYPTO_ACC_MAX_CIPHER_IV_LENGTH];
++ unsigned char *ixp_q_iv;
++};
++
++struct ixp_data {
++ int ixp_registered; /* is the context registered */
++ int ixp_crd_flags; /* detect direction changes */
++
++ int ixp_cipher_alg;
++ int ixp_auth_alg;
++
++ UINT32 ixp_ctx_id;
++ UINT32 ixp_hash_key_id; /* used when hashing */
++ IxCryptoAccCtx ixp_ctx;
++ IX_MBUF ixp_pri_mbuf;
++ IX_MBUF ixp_sec_mbuf;
++
++ struct work_struct ixp_pending_work;
++ struct work_struct ixp_registration_work;
++ struct list_head ixp_q; /* unprocessed requests */
++};
++
++#ifdef __ixp46X
++
++#define MAX_IOP_SIZE 64 /* words */
++#define MAX_OOP_SIZE 128
++
++#define MAX_PARAMS 3
++
++struct ixp_pkq {
++ struct list_head pkq_list;
++ struct cryptkop *pkq_krp;
++
++ IxCryptoAccPkeEauInOperands pkq_op;
++ IxCryptoAccPkeEauOpResult pkq_result;
++
++ UINT32 pkq_ibuf0[MAX_IOP_SIZE];
++ UINT32 pkq_ibuf1[MAX_IOP_SIZE];
++ UINT32 pkq_ibuf2[MAX_IOP_SIZE];
++ UINT32 pkq_obuf[MAX_OOP_SIZE];
++};
++
++static LIST_HEAD(ixp_pkq); /* current PK wait list */
++static struct ixp_pkq *ixp_pk_cur;
++static spinlock_t ixp_pkq_lock;
++
++#endif /* __ixp46X */
++
++static int ixp_blocked = 0;
++
++static int32_t ixp_id = -1;
++static struct ixp_data **ixp_sessions = NULL;
++static u_int32_t ixp_sesnum = 0;
++
++static int ixp_process(device_t, struct cryptop *, int);
++static int ixp_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int ixp_freesession(device_t, u_int64_t);
++#ifdef __ixp46X
++static int ixp_kprocess(device_t, struct cryptkop *krp, int hint);
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
++static kmem_cache_t *qcache;
++#else
++static struct kmem_cache *qcache;
++#endif
++
++#define debug ixp_debug
++static int ixp_debug = 0;
++module_param(ixp_debug, int, 0644);
++MODULE_PARM_DESC(ixp_debug, "Enable debug");
++
++static int ixp_init_crypto = 1;
++module_param(ixp_init_crypto, int, 0444); /* RO after load/boot */
++MODULE_PARM_DESC(ixp_init_crypto, "Call ixCryptoAccInit (default is 1)");
++
++static void ixp_process_pending(void *arg);
++static void ixp_registration(void *arg);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void ixp_process_pending_wq(struct work_struct *work);
++static void ixp_registration_wq(struct work_struct *work);
++#endif
++
++/*
++ * dummy device structure
++ */
++
++static struct {
++ softc_device_decl sc_dev;
++} ixpdev;
++
++static device_method_t ixp_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, ixp_newsession),
++ DEVMETHOD(cryptodev_freesession,ixp_freesession),
++ DEVMETHOD(cryptodev_process, ixp_process),
++#ifdef __ixp46X
++ DEVMETHOD(cryptodev_kprocess, ixp_kprocess),
++#endif
++};
++
++/*
++ * Generate a new software session.
++ */
++static int
++ixp_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri)
++{
++ struct ixp_data *ixp;
++ u_int32_t i;
++#define AUTH_LEN(cri, def) \
++ (cri->cri_mlen ? cri->cri_mlen : (def))
++
++ dprintk("%s():alg %d\n", __FUNCTION__,cri->cri_alg);
++ if (sid == NULL || cri == NULL) {
++ dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ if (ixp_sessions) {
++ for (i = 1; i < ixp_sesnum; i++)
++ if (ixp_sessions[i] == NULL)
++ break;
++ } else
++ i = 1; /* NB: to silence compiler warning */
++
++ if (ixp_sessions == NULL || i == ixp_sesnum) {
++ struct ixp_data **ixpd;
++
++ if (ixp_sessions == NULL) {
++ i = 1; /* We leave ixp_sessions[0] empty */
++ ixp_sesnum = CRYPTO_SW_SESSIONS;
++ } else
++ ixp_sesnum *= 2;
++
++ ixpd = kmalloc(ixp_sesnum * sizeof(struct ixp_data *), SLAB_ATOMIC);
++ if (ixpd == NULL) {
++ /* Reset session number */
++ if (ixp_sesnum == CRYPTO_SW_SESSIONS)
++ ixp_sesnum = 0;
++ else
++ ixp_sesnum /= 2;
++ dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++ memset(ixpd, 0, ixp_sesnum * sizeof(struct ixp_data *));
++
++ /* Copy existing sessions */
++ if (ixp_sessions) {
++ memcpy(ixpd, ixp_sessions,
++ (ixp_sesnum / 2) * sizeof(struct ixp_data *));
++ kfree(ixp_sessions);
++ }
++
++ ixp_sessions = ixpd;
++ }
++
++ ixp_sessions[i] = (struct ixp_data *) kmalloc(sizeof(struct ixp_data),
++ SLAB_ATOMIC);
++ if (ixp_sessions[i] == NULL) {
++ ixp_freesession(NULL, i);
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return ENOBUFS;
++ }
++
++ *sid = i;
++
++ ixp = ixp_sessions[i];
++ memset(ixp, 0, sizeof(*ixp));
++
++ ixp->ixp_cipher_alg = -1;
++ ixp->ixp_auth_alg = -1;
++ ixp->ixp_ctx_id = -1;
++ INIT_LIST_HEAD(&ixp->ixp_q);
++
++ ixp->ixp_ctx.useDifferentSrcAndDestMbufs = 0;
++
++ while (cri) {
++ switch (cri->cri_alg) {
++ case CRYPTO_DES_CBC:
++ ixp->ixp_cipher_alg = cri->cri_alg;
++ ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_DES;
++ ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
++ ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
++ ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
++ ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
++ IX_CRYPTO_ACC_DES_IV_64;
++ memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
++ cri->cri_key, (cri->cri_klen + 7) / 8);
++ break;
++
++ case CRYPTO_3DES_CBC:
++ ixp->ixp_cipher_alg = cri->cri_alg;
++ ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_3DES;
++ ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
++ ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
++ ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
++ ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
++ IX_CRYPTO_ACC_DES_IV_64;
++ memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
++ cri->cri_key, (cri->cri_klen + 7) / 8);
++ break;
++
++ case CRYPTO_RIJNDAEL128_CBC:
++ ixp->ixp_cipher_alg = cri->cri_alg;
++ ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_AES;
++ ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
++ ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
++ ixp->ixp_ctx.cipherCtx.cipherBlockLen = 16;
++ ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen = 16;
++ memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
++ cri->cri_key, (cri->cri_klen + 7) / 8);
++ break;
++
++ case CRYPTO_MD5:
++ case CRYPTO_MD5_HMAC:
++ ixp->ixp_auth_alg = cri->cri_alg;
++ ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_MD5;
++ ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, MD5_HASH_LEN);
++ ixp->ixp_ctx.authCtx.aadLen = 0;
++ /* Only MD5_HMAC needs a key */
++ if (cri->cri_alg == CRYPTO_MD5_HMAC) {
++ ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
++ if (ixp->ixp_ctx.authCtx.authKeyLen >
++ sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
++ printk(
++ "ixp4xx: Invalid key length for MD5_HMAC - %d bits\n",
++ cri->cri_klen);
++ ixp_freesession(NULL, i);
++ return EINVAL;
++ }
++ memcpy(ixp->ixp_ctx.authCtx.key.authKey,
++ cri->cri_key, (cri->cri_klen + 7) / 8);
++ }
++ break;
++
++ case CRYPTO_SHA1:
++ case CRYPTO_SHA1_HMAC:
++ ixp->ixp_auth_alg = cri->cri_alg;
++ ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_SHA1;
++ ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, SHA1_HASH_LEN);
++ ixp->ixp_ctx.authCtx.aadLen = 0;
++ /* Only SHA1_HMAC needs a key */
++ if (cri->cri_alg == CRYPTO_SHA1_HMAC) {
++ ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
++ if (ixp->ixp_ctx.authCtx.authKeyLen >
++ sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
++ printk(
++ "ixp4xx: Invalid key length for SHA1_HMAC - %d bits\n",
++ cri->cri_klen);
++ ixp_freesession(NULL, i);
++ return EINVAL;
++ }
++ memcpy(ixp->ixp_ctx.authCtx.key.authKey,
++ cri->cri_key, (cri->cri_klen + 7) / 8);
++ }
++ break;
++
++ default:
++ printk("ixp: unknown algo 0x%x\n", cri->cri_alg);
++ ixp_freesession(NULL, i);
++ return EINVAL;
++ }
++ cri = cri->cri_next;
++ }
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending_wq);
++ INIT_WORK(&ixp->ixp_registration_work, ixp_registration_wq);
++#else
++ INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending, ixp);
++ INIT_WORK(&ixp->ixp_registration_work, ixp_registration, ixp);
++#endif
++
++ return 0;
++}
++
++
++/*
++ * Free a session.
++ */
++static int
++ixp_freesession(device_t dev, u_int64_t tid)
++{
++ u_int32_t sid = CRYPTO_SESID2LID(tid);
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (sid > ixp_sesnum || ixp_sessions == NULL ||
++ ixp_sessions[sid] == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ /* Silently accept and return */
++ if (sid == 0)
++ return 0;
++
++ if (ixp_sessions[sid]) {
++ if (ixp_sessions[sid]->ixp_ctx_id != -1) {
++ ixCryptoAccCtxUnregister(ixp_sessions[sid]->ixp_ctx_id);
++ ixp_sessions[sid]->ixp_ctx_id = -1;
++ }
++
++ flush_scheduled_work();
++
++ kfree(ixp_sessions[sid]);
++ }
++ ixp_sessions[sid] = NULL;
++ if (ixp_blocked) {
++ ixp_blocked = 0;
++ crypto_unblock(ixp_id, CRYPTO_SYMQ);
++ }
++ return 0;
++}
++
++
++/*
++ * callback for when hash processing is complete
++ */
++
++static void
++ixp_hash_perform_cb(
++ UINT32 hash_key_id,
++ IX_MBUF *bufp,
++ IxCryptoAccStatus status)
++{
++ struct ixp_q *q;
++
++ dprintk("%s(%u, %p, 0x%x)\n", __FUNCTION__, hash_key_id, bufp, status);
++
++ if (bufp == NULL) {
++ printk("ixp: NULL buf in %s\n", __FUNCTION__);
++ return;
++ }
++
++ q = IX_MBUF_PRIV(bufp);
++ if (q == NULL) {
++ printk("ixp: NULL priv in %s\n", __FUNCTION__);
++ return;
++ }
++
++ if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ /* On success, need to copy hash back into original client buffer */
++ memcpy(q->ixp_hash_dest, q->ixp_hash_src,
++ (q->ixp_q_data->ixp_auth_alg == CRYPTO_SHA1) ?
++ SHA1_HASH_LEN : MD5_HASH_LEN);
++ }
++ else {
++ printk("ixp: hash perform failed status=%d\n", status);
++ q->ixp_q_crp->crp_etype = EINVAL;
++ }
++
++ /* Free internal buffer used for hashing */
++ kfree(IX_MBUF_MDATA(&q->ixp_q_mbuf));
++
++ crypto_done(q->ixp_q_crp);
++ kmem_cache_free(qcache, q);
++}
++
++/*
++ * setup a request and perform it
++ */
++static void
++ixp_q_process(struct ixp_q *q)
++{
++ IxCryptoAccStatus status;
++ struct ixp_data *ixp = q->ixp_q_data;
++ int auth_off = 0;
++ int auth_len = 0;
++ int crypt_off = 0;
++ int crypt_len = 0;
++ int icv_off = 0;
++ char *crypt_func;
++
++ dprintk("%s(%p)\n", __FUNCTION__, q);
++
++ if (q->ixp_q_ccrd) {
++ if (q->ixp_q_ccrd->crd_flags & CRD_F_IV_EXPLICIT) {
++ q->ixp_q_iv = q->ixp_q_ccrd->crd_iv;
++ } else {
++ q->ixp_q_iv = q->ixp_q_iv_data;
++ crypto_copydata(q->ixp_q_crp->crp_flags, q->ixp_q_crp->crp_buf,
++ q->ixp_q_ccrd->crd_inject,
++ ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen,
++ (caddr_t) q->ixp_q_iv);
++ }
++
++ if (q->ixp_q_acrd) {
++ auth_off = q->ixp_q_acrd->crd_skip;
++ auth_len = q->ixp_q_acrd->crd_len;
++ icv_off = q->ixp_q_acrd->crd_inject;
++ }
++
++ crypt_off = q->ixp_q_ccrd->crd_skip;
++ crypt_len = q->ixp_q_ccrd->crd_len;
++ } else { /* if (q->ixp_q_acrd) */
++ auth_off = q->ixp_q_acrd->crd_skip;
++ auth_len = q->ixp_q_acrd->crd_len;
++ icv_off = q->ixp_q_acrd->crd_inject;
++ }
++
++ if (q->ixp_q_crp->crp_flags & CRYPTO_F_SKBUF) {
++ struct sk_buff *skb = (struct sk_buff *) q->ixp_q_crp->crp_buf;
++ if (skb_shinfo(skb)->nr_frags) {
++ /*
++ * DAVIDM fix this limitation one day by using
++ * a buffer pool and chaining, it is not currently
++ * needed for current user/kernel space acceleration
++ */
++ printk("ixp: Cannot handle fragmented skb's yet !\n");
++ q->ixp_q_crp->crp_etype = ENOENT;
++ goto done;
++ }
++ IX_MBUF_MLEN(&q->ixp_q_mbuf) =
++ IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = skb->len;
++ IX_MBUF_MDATA(&q->ixp_q_mbuf) = skb->data;
++ } else if (q->ixp_q_crp->crp_flags & CRYPTO_F_IOV) {
++ struct uio *uiop = (struct uio *) q->ixp_q_crp->crp_buf;
++ if (uiop->uio_iovcnt != 1) {
++ /*
++ * DAVIDM fix this limitation one day by using
++ * a buffer pool and chaining, it is not currently
++ * needed for current user/kernel space acceleration
++ */
++ printk("ixp: Cannot handle more than 1 iovec yet !\n");
++ q->ixp_q_crp->crp_etype = ENOENT;
++ goto done;
++ }
++ IX_MBUF_MLEN(&q->ixp_q_mbuf) =
++ IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_len;
++ IX_MBUF_MDATA(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_base;
++ } else /* contig buffer */ {
++ IX_MBUF_MLEN(&q->ixp_q_mbuf) =
++ IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_ilen;
++ IX_MBUF_MDATA(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_buf;
++ }
++
++ IX_MBUF_PRIV(&q->ixp_q_mbuf) = q;
++
++ if (ixp->ixp_auth_alg == CRYPTO_SHA1 || ixp->ixp_auth_alg == CRYPTO_MD5) {
++ /*
++ * For SHA1 and MD5 hash, need to create an internal buffer that is big
++ * enough to hold the original data + the appropriate padding for the
++ * hash algorithm.
++ */
++ UINT8 *tbuf = NULL;
++
++ IX_MBUF_MLEN(&q->ixp_q_mbuf) = IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) =
++ ((IX_MBUF_MLEN(&q->ixp_q_mbuf) * 8) + 72 + 511) / 8;
++ tbuf = kmalloc(IX_MBUF_MLEN(&q->ixp_q_mbuf), SLAB_ATOMIC);
++
++ if (IX_MBUF_MDATA(&q->ixp_q_mbuf) == NULL) {
++ printk("ixp: kmalloc(%u, SLAB_ATOMIC) failed\n",
++ IX_MBUF_MLEN(&q->ixp_q_mbuf));
++ q->ixp_q_crp->crp_etype = ENOMEM;
++ goto done;
++ }
++ memcpy(tbuf, &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off], auth_len);
++
++ /* Set location in client buffer to copy hash into */
++ q->ixp_hash_dest =
++ &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off + auth_len];
++
++ IX_MBUF_MDATA(&q->ixp_q_mbuf) = tbuf;
++
++ /* Set location in internal buffer for where hash starts */
++ q->ixp_hash_src = &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_len];
++
++ crypt_func = "ixCryptoAccHashPerform";
++ status = ixCryptoAccHashPerform(ixp->ixp_ctx.authCtx.authAlgo,
++ &q->ixp_q_mbuf, ixp_hash_perform_cb, 0, auth_len, auth_len,
++ &ixp->ixp_hash_key_id);
++ }
++ else {
++ crypt_func = "ixCryptoAccAuthCryptPerform";
++ status = ixCryptoAccAuthCryptPerform(ixp->ixp_ctx_id, &q->ixp_q_mbuf,
++ NULL, auth_off, auth_len, crypt_off, crypt_len, icv_off,
++ q->ixp_q_iv);
++ }
++
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
++ return;
++
++ if (IX_CRYPTO_ACC_STATUS_QUEUE_FULL == status) {
++ q->ixp_q_crp->crp_etype = ENOMEM;
++ goto done;
++ }
++
++ printk("ixp: %s failed %u\n", crypt_func, status);
++ q->ixp_q_crp->crp_etype = EINVAL;
++
++done:
++ crypto_done(q->ixp_q_crp);
++ kmem_cache_free(qcache, q);
++}
++
++
++/*
++ * because we cannot process the Q from the Register callback
++ * we do it here on a task Q.
++ */
++
++static void
++ixp_process_pending(void *arg)
++{
++ struct ixp_data *ixp = arg;
++ struct ixp_q *q = NULL;
++
++ dprintk("%s(%p)\n", __FUNCTION__, arg);
++
++ if (!ixp)
++ return;
++
++ while (!list_empty(&ixp->ixp_q)) {
++ q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
++ list_del(&q->ixp_q_list);
++ ixp_q_process(q);
++ }
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void
++ixp_process_pending_wq(struct work_struct *work)
++{
++ struct ixp_data *ixp = container_of(work, struct ixp_data,
++ ixp_pending_work);
++ ixp_process_pending(ixp);
++}
++#endif
++
++/*
++ * callback for when context registration is complete
++ */
++
++static void
++ixp_register_cb(UINT32 ctx_id, IX_MBUF *bufp, IxCryptoAccStatus status)
++{
++ int i;
++ struct ixp_data *ixp;
++ struct ixp_q *q;
++
++ dprintk("%s(%d, %p, %d)\n", __FUNCTION__, ctx_id, bufp, status);
++
++ /*
++ * free any buffer passed in to this routine
++ */
++ if (bufp) {
++ IX_MBUF_MLEN(bufp) = IX_MBUF_PKT_LEN(bufp) = 0;
++ kfree(IX_MBUF_MDATA(bufp));
++ IX_MBUF_MDATA(bufp) = NULL;
++ }
++
++ for (i = 0; i < ixp_sesnum; i++) {
++ ixp = ixp_sessions[i];
++ if (ixp && ixp->ixp_ctx_id == ctx_id)
++ break;
++ }
++ if (i >= ixp_sesnum) {
++ printk("ixp: invalid context id %d\n", ctx_id);
++ return;
++ }
++
++ if (IX_CRYPTO_ACC_STATUS_WAIT == status) {
++ /* this is normal to free the first of two buffers */
++ dprintk("ixp: register not finished yet.\n");
++ return;
++ }
++
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS != status) {
++ printk("ixp: register failed 0x%x\n", status);
++ while (!list_empty(&ixp->ixp_q)) {
++ q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
++ list_del(&q->ixp_q_list);
++ q->ixp_q_crp->crp_etype = EINVAL;
++ crypto_done(q->ixp_q_crp);
++ kmem_cache_free(qcache, q);
++ }
++ return;
++ }
++
++ /*
++ * we are now registered, we cannot start processing the Q here
++ * or we get strange errors with AES (DES/3DES seem to be ok).
++ */
++ ixp->ixp_registered = 1;
++ schedule_work(&ixp->ixp_pending_work);
++}
++
++
++/*
++ * callback for when data processing is complete
++ */
++
++static void
++ixp_perform_cb(
++ UINT32 ctx_id,
++ IX_MBUF *sbufp,
++ IX_MBUF *dbufp,
++ IxCryptoAccStatus status)
++{
++ struct ixp_q *q;
++
++ dprintk("%s(%d, %p, %p, 0x%x)\n", __FUNCTION__, ctx_id, sbufp,
++ dbufp, status);
++
++ if (sbufp == NULL) {
++ printk("ixp: NULL sbuf in ixp_perform_cb\n");
++ return;
++ }
++
++ q = IX_MBUF_PRIV(sbufp);
++ if (q == NULL) {
++ printk("ixp: NULL priv in ixp_perform_cb\n");
++ return;
++ }
++
++ if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ printk("ixp: perform failed status=%d\n", status);
++ q->ixp_q_crp->crp_etype = EINVAL;
++ }
++
++ crypto_done(q->ixp_q_crp);
++ kmem_cache_free(qcache, q);
++}
++
++
++/*
++ * registration is not callable at IRQ time, so we defer
++ * to a task queue, this routines completes the registration for us
++ * when the task queue runs
++ *
++ * Unfortunately this means we cannot tell OCF that the driver is blocked,
++ * we do that on the next request.
++ */
++
++static void
++ixp_registration(void *arg)
++{
++ struct ixp_data *ixp = arg;
++ struct ixp_q *q = NULL;
++ IX_MBUF *pri = NULL, *sec = NULL;
++ int status = IX_CRYPTO_ACC_STATUS_SUCCESS;
++
++ if (!ixp) {
++ printk("ixp: ixp_registration with no arg\n");
++ return;
++ }
++
++ if (ixp->ixp_ctx_id != -1) {
++ ixCryptoAccCtxUnregister(ixp->ixp_ctx_id);
++ ixp->ixp_ctx_id = -1;
++ }
++
++ if (list_empty(&ixp->ixp_q)) {
++ printk("ixp: ixp_registration with no Q\n");
++ return;
++ }
++
++ /*
++ * setup the primary and secondary buffers
++ */
++ q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
++ if (q->ixp_q_acrd) {
++ pri = &ixp->ixp_pri_mbuf;
++ sec = &ixp->ixp_sec_mbuf;
++ IX_MBUF_MLEN(pri) = IX_MBUF_PKT_LEN(pri) = 128;
++ IX_MBUF_MDATA(pri) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
++ IX_MBUF_MLEN(sec) = IX_MBUF_PKT_LEN(sec) = 128;
++ IX_MBUF_MDATA(sec) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
++ }
++
++ /* Only need to register if a crypt op or HMAC op */
++ if (!(ixp->ixp_auth_alg == CRYPTO_SHA1 ||
++ ixp->ixp_auth_alg == CRYPTO_MD5)) {
++ status = ixCryptoAccCtxRegister(
++ &ixp->ixp_ctx,
++ pri, sec,
++ ixp_register_cb,
++ ixp_perform_cb,
++ &ixp->ixp_ctx_id);
++ }
++ else {
++ /* Otherwise we start processing pending q */
++ schedule_work(&ixp->ixp_pending_work);
++ }
++
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
++ return;
++
++ if (IX_CRYPTO_ACC_STATUS_EXCEED_MAX_TUNNELS == status) {
++ printk("ixp: ixCryptoAccCtxRegister failed (out of tunnels)\n");
++ ixp_blocked = 1;
++ /* perhaps we should return EGAIN on queued ops ? */
++ return;
++ }
++
++ printk("ixp: ixCryptoAccCtxRegister failed %d\n", status);
++ ixp->ixp_ctx_id = -1;
++
++ /*
++ * everything waiting is toasted
++ */
++ while (!list_empty(&ixp->ixp_q)) {
++ q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
++ list_del(&q->ixp_q_list);
++ q->ixp_q_crp->crp_etype = ENOENT;
++ crypto_done(q->ixp_q_crp);
++ kmem_cache_free(qcache, q);
++ }
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void
++ixp_registration_wq(struct work_struct *work)
++{
++ struct ixp_data *ixp = container_of(work, struct ixp_data,
++ ixp_registration_work);
++ ixp_registration(ixp);
++}
++#endif
++
++/*
++ * Process a request.
++ */
++static int
++ixp_process(device_t dev, struct cryptop *crp, int hint)
++{
++ struct ixp_data *ixp;
++ unsigned int lid;
++ struct ixp_q *q = NULL;
++ int status;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ /* Sanity check */
++ if (crp == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ crp->crp_etype = 0;
++
++ if (ixp_blocked)
++ return ERESTART;
++
++ if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ crp->crp_etype = EINVAL;
++ goto done;
++ }
++
++ /*
++ * find the session we are using
++ */
++
++ lid = crp->crp_sid & 0xffffffff;
++ if (lid >= ixp_sesnum || lid == 0 || ixp_sessions == NULL ||
++ ixp_sessions[lid] == NULL) {
++ crp->crp_etype = ENOENT;
++ dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
++ goto done;
++ }
++ ixp = ixp_sessions[lid];
++
++ /*
++ * setup a new request ready for queuing
++ */
++ q = kmem_cache_alloc(qcache, SLAB_ATOMIC);
++ if (q == NULL) {
++ dprintk("%s,%d: ENOMEM\n", __FILE__, __LINE__);
++ crp->crp_etype = ENOMEM;
++ goto done;
++ }
++ /*
++ * save some cycles by only zeroing the important bits
++ */
++ memset(&q->ixp_q_mbuf, 0, sizeof(q->ixp_q_mbuf));
++ q->ixp_q_ccrd = NULL;
++ q->ixp_q_acrd = NULL;
++ q->ixp_q_crp = crp;
++ q->ixp_q_data = ixp;
++
++ /*
++ * point the cipher and auth descriptors appropriately
++ * check that we have something to do
++ */
++ if (crp->crp_desc->crd_alg == ixp->ixp_cipher_alg)
++ q->ixp_q_ccrd = crp->crp_desc;
++ else if (crp->crp_desc->crd_alg == ixp->ixp_auth_alg)
++ q->ixp_q_acrd = crp->crp_desc;
++ else {
++ crp->crp_etype = ENOENT;
++ dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
++ goto done;
++ }
++ if (crp->crp_desc->crd_next) {
++ if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_cipher_alg)
++ q->ixp_q_ccrd = crp->crp_desc->crd_next;
++ else if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_auth_alg)
++ q->ixp_q_acrd = crp->crp_desc->crd_next;
++ else {
++ crp->crp_etype = ENOENT;
++ dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
++ goto done;
++ }
++ }
++
++ /*
++ * If there is a direction change for this context then we mark it as
++ * unregistered and re-register is for the new direction. This is not
++ * a very expensive operation and currently only tends to happen when
++ * user-space application are doing benchmarks
++ *
++ * DM - we should be checking for pending requests before unregistering.
++ */
++ if (q->ixp_q_ccrd && ixp->ixp_registered &&
++ ixp->ixp_crd_flags != (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT)) {
++ dprintk("%s - detected direction change on session\n", __FUNCTION__);
++ ixp->ixp_registered = 0;
++ }
++
++ /*
++ * if we are registered, call straight into the perform code
++ */
++ if (ixp->ixp_registered) {
++ ixp_q_process(q);
++ return 0;
++ }
++
++ /*
++ * the only part of the context not set in newsession is the direction
++ * dependent parts
++ */
++ if (q->ixp_q_ccrd) {
++ ixp->ixp_crd_flags = (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT);
++ if (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT) {
++ ixp->ixp_ctx.operation = q->ixp_q_acrd ?
++ IX_CRYPTO_ACC_OP_ENCRYPT_AUTH : IX_CRYPTO_ACC_OP_ENCRYPT;
++ } else {
++ ixp->ixp_ctx.operation = q->ixp_q_acrd ?
++ IX_CRYPTO_ACC_OP_AUTH_DECRYPT : IX_CRYPTO_ACC_OP_DECRYPT;
++ }
++ } else {
++ /* q->ixp_q_acrd must be set if we are here */
++ ixp->ixp_ctx.operation = IX_CRYPTO_ACC_OP_AUTH_CALC;
++ }
++
++ status = list_empty(&ixp->ixp_q);
++ list_add_tail(&q->ixp_q_list, &ixp->ixp_q);
++ if (status)
++ schedule_work(&ixp->ixp_registration_work);
++ return 0;
++
++done:
++ if (q)
++ kmem_cache_free(qcache, q);
++ crypto_done(crp);
++ return 0;
++}
++
++
++#ifdef __ixp46X
++/*
++ * key processing support for the ixp465
++ */
++
++
++/*
++ * copy a BN (LE) into a buffer (BE) an fill out the op appropriately
++ * assume zeroed and only copy bits that are significant
++ */
++
++static int
++ixp_copy_ibuf(struct crparam *p, IxCryptoAccPkeEauOperand *op, UINT32 *buf)
++{
++ unsigned char *src = (unsigned char *) p->crp_p;
++ unsigned char *dst;
++ int len, bits = p->crp_nbits;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ if (bits > MAX_IOP_SIZE * sizeof(UINT32) * 8) {
++ dprintk("%s - ibuf too big (%d > %d)\n", __FUNCTION__,
++ bits, MAX_IOP_SIZE * sizeof(UINT32) * 8);
++ return -1;
++ }
++
++ len = (bits + 31) / 32; /* the number UINT32's needed */
++
++ dst = (unsigned char *) &buf[len];
++ dst--;
++
++ while (bits > 0) {
++ *dst-- = *src++;
++ bits -= 8;
++ }
++
++#if 0 /* no need to zero remaining bits as it is done during request alloc */
++ while (dst > (unsigned char *) buf)
++ *dst-- = '\0';
++#endif
++
++ op->pData = buf;
++ op->dataLen = len;
++ return 0;
++}
++
++/*
++ * copy out the result, be as forgiving as we can about small output buffers
++ */
++
++static int
++ixp_copy_obuf(struct crparam *p, IxCryptoAccPkeEauOpResult *op, UINT32 *buf)
++{
++ unsigned char *dst = (unsigned char *) p->crp_p;
++ unsigned char *src = (unsigned char *) buf;
++ int len, z, bits = p->crp_nbits;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ len = op->dataLen * sizeof(UINT32);
++
++ /* skip leading zeroes to be small buffer friendly */
++ z = 0;
++ while (z < len && src[z] == '\0')
++ z++;
++
++ src += len;
++ src--;
++ len -= z;
++
++ while (len > 0 && bits > 0) {
++ *dst++ = *src--;
++ len--;
++ bits -= 8;
++ }
++
++ while (bits > 0) {
++ *dst++ = '\0';
++ bits -= 8;
++ }
++
++ if (len > 0) {
++ dprintk("%s - obuf is %d (z=%d, ob=%d) bytes too small\n",
++ __FUNCTION__, len, z, p->crp_nbits / 8);
++ return -1;
++ }
++
++ return 0;
++}
++
++
++/*
++ * the parameter offsets for exp_mod
++ */
++
++#define IXP_PARAM_BASE 0
++#define IXP_PARAM_EXP 1
++#define IXP_PARAM_MOD 2
++#define IXP_PARAM_RES 3
++
++/*
++ * key processing complete callback, is also used to start processing
++ * by passing a NULL for pResult
++ */
++
++static void
++ixp_kperform_cb(
++ IxCryptoAccPkeEauOperation operation,
++ IxCryptoAccPkeEauOpResult *pResult,
++ BOOL carryOrBorrow,
++ IxCryptoAccStatus status)
++{
++ struct ixp_pkq *q, *tmp;
++ unsigned long flags;
++
++ dprintk("%s(0x%x, %p, %d, 0x%x)\n", __FUNCTION__, operation, pResult,
++ carryOrBorrow, status);
++
++ /* handle a completed request */
++ if (pResult) {
++ if (ixp_pk_cur && &ixp_pk_cur->pkq_result == pResult) {
++ q = ixp_pk_cur;
++ if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ dprintk("%s() - op failed 0x%x\n", __FUNCTION__, status);
++ q->pkq_krp->krp_status = ERANGE; /* could do better */
++ } else {
++ /* copy out the result */
++ if (ixp_copy_obuf(&q->pkq_krp->krp_param[IXP_PARAM_RES],
++ &q->pkq_result, q->pkq_obuf))
++ q->pkq_krp->krp_status = ERANGE;
++ }
++ crypto_kdone(q->pkq_krp);
++ kfree(q);
++ ixp_pk_cur = NULL;
++ } else
++ printk("%s - callback with invalid result pointer\n", __FUNCTION__);
++ }
++
++ spin_lock_irqsave(&ixp_pkq_lock, flags);
++ if (ixp_pk_cur || list_empty(&ixp_pkq)) {
++ spin_unlock_irqrestore(&ixp_pkq_lock, flags);
++ return;
++ }
++
++ list_for_each_entry_safe(q, tmp, &ixp_pkq, pkq_list) {
++
++ list_del(&q->pkq_list);
++ ixp_pk_cur = q;
++
++ spin_unlock_irqrestore(&ixp_pkq_lock, flags);
++
++ status = ixCryptoAccPkeEauPerform(
++ IX_CRYPTO_ACC_OP_EAU_MOD_EXP,
++ &q->pkq_op,
++ ixp_kperform_cb,
++ &q->pkq_result);
++
++ if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ dprintk("%s() - ixCryptoAccPkeEauPerform SUCCESS\n", __FUNCTION__);
++ return; /* callback will return here for callback */
++ } else if (status == IX_CRYPTO_ACC_STATUS_RETRY) {
++ printk("%s() - ixCryptoAccPkeEauPerform RETRY\n", __FUNCTION__);
++ } else {
++ printk("%s() - ixCryptoAccPkeEauPerform failed %d\n",
++ __FUNCTION__, status);
++ }
++ q->pkq_krp->krp_status = ERANGE; /* could do better */
++ crypto_kdone(q->pkq_krp);
++ kfree(q);
++ spin_lock_irqsave(&ixp_pkq_lock, flags);
++ }
++ spin_unlock_irqrestore(&ixp_pkq_lock, flags);
++}
++
++
++static int
++ixp_kprocess(device_t dev, struct cryptkop *krp, int hint)
++{
++ struct ixp_pkq *q;
++ int rc = 0;
++ unsigned long flags;
++
++ dprintk("%s l1=%d l2=%d l3=%d l4=%d\n", __FUNCTION__,
++ krp->krp_param[IXP_PARAM_BASE].crp_nbits,
++ krp->krp_param[IXP_PARAM_EXP].crp_nbits,
++ krp->krp_param[IXP_PARAM_MOD].crp_nbits,
++ krp->krp_param[IXP_PARAM_RES].crp_nbits);
++
++
++ if (krp->krp_op != CRK_MOD_EXP) {
++ krp->krp_status = EOPNOTSUPP;
++ goto err;
++ }
++
++ q = (struct ixp_pkq *) kmalloc(sizeof(*q), GFP_KERNEL);
++ if (q == NULL) {
++ krp->krp_status = ENOMEM;
++ goto err;
++ }
++
++ /*
++ * The PKE engine does not appear to zero the output buffer
++ * appropriately, so we need to do it all here.
++ */
++ memset(q, 0, sizeof(*q));
++
++ q->pkq_krp = krp;
++ INIT_LIST_HEAD(&q->pkq_list);
++
++ if (ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_BASE], &q->pkq_op.modExpOpr.M,
++ q->pkq_ibuf0))
++ rc = 1;
++ if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_EXP],
++ &q->pkq_op.modExpOpr.e, q->pkq_ibuf1))
++ rc = 2;
++ if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_MOD],
++ &q->pkq_op.modExpOpr.N, q->pkq_ibuf2))
++ rc = 3;
++
++ if (rc) {
++ kfree(q);
++ krp->krp_status = ERANGE;
++ goto err;
++ }
++
++ q->pkq_result.pData = q->pkq_obuf;
++ q->pkq_result.dataLen =
++ (krp->krp_param[IXP_PARAM_RES].crp_nbits + 31) / 32;
++
++ spin_lock_irqsave(&ixp_pkq_lock, flags);
++ list_add_tail(&q->pkq_list, &ixp_pkq);
++ spin_unlock_irqrestore(&ixp_pkq_lock, flags);
++
++ if (!ixp_pk_cur)
++ ixp_kperform_cb(0, NULL, 0, 0);
++ return (0);
++
++err:
++ crypto_kdone(krp);
++ return (0);
++}
++
++
++
++#ifdef CONFIG_OCF_RANDOMHARVEST
++/*
++ * We run the random number generator output through SHA so that it
++ * is FIPS compliant.
++ */
++
++static volatile int sha_done = 0;
++static unsigned char sha_digest[20];
++
++static void
++ixp_hash_cb(UINT8 *digest, IxCryptoAccStatus status)
++{
++ dprintk("%s(%p, %d)\n", __FUNCTION__, digest, status);
++ if (sha_digest != digest)
++ printk("digest error\n");
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
++ sha_done = 1;
++ else
++ sha_done = -status;
++}
++
++static int
++ixp_read_random(void *arg, u_int32_t *buf, int maxwords)
++{
++ IxCryptoAccStatus status;
++ int i, n, rc;
++
++ dprintk("%s(%p, %d)\n", __FUNCTION__, buf, maxwords);
++ memset(buf, 0, maxwords * sizeof(*buf));
++ status = ixCryptoAccPkePseudoRandomNumberGet(maxwords, buf);
++ if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ dprintk("%s: ixCryptoAccPkePseudoRandomNumberGet failed %d\n",
++ __FUNCTION__, status);
++ return 0;
++ }
++
++ /*
++ * run the random data through SHA to make it look more random
++ */
++
++ n = sizeof(sha_digest); /* process digest bytes at a time */
++
++ rc = 0;
++ for (i = 0; i < maxwords; i += n / sizeof(*buf)) {
++ if ((maxwords - i) * sizeof(*buf) < n)
++ n = (maxwords - i) * sizeof(*buf);
++ sha_done = 0;
++ status = ixCryptoAccPkeHashPerform(IX_CRYPTO_ACC_AUTH_SHA1,
++ (UINT8 *) &buf[i], n, ixp_hash_cb, sha_digest);
++ if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
++ dprintk("ixCryptoAccPkeHashPerform failed %d\n", status);
++ return -EIO;
++ }
++ while (!sha_done)
++ schedule();
++ if (sha_done < 0) {
++ dprintk("ixCryptoAccPkeHashPerform failed CB %d\n", -sha_done);
++ return 0;
++ }
++ memcpy(&buf[i], sha_digest, n);
++ rc += n / sizeof(*buf);;
++ }
++
++ return rc;
++}
++#endif /* CONFIG_OCF_RANDOMHARVEST */
++
++#endif /* __ixp46X */
++
++
++
++/*
++ * our driver startup and shutdown routines
++ */
++
++static int
++ixp_init(void)
++{
++ dprintk("%s(%p)\n", __FUNCTION__, ixp_init);
++
++ if (ixp_init_crypto && ixCryptoAccInit() != IX_CRYPTO_ACC_STATUS_SUCCESS)
++ printk("ixCryptoAccInit failed, assuming already initialised!\n");
++
++ qcache = kmem_cache_create("ixp4xx_q", sizeof(struct ixp_q), 0,
++ SLAB_HWCACHE_ALIGN, NULL
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
++ , NULL
++#endif
++ );
++ if (!qcache) {
++ printk("failed to create Qcache\n");
++ return -ENOENT;
++ }
++
++ memset(&ixpdev, 0, sizeof(ixpdev));
++ softc_device_init(&ixpdev, "ixp4xx", 0, ixp_methods);
++
++ ixp_id = crypto_get_driverid(softc_get_device(&ixpdev),
++ CRYPTOCAP_F_HARDWARE);
++ if (ixp_id < 0)
++ panic("IXP/OCF crypto device cannot initialize!");
++
++#define REGISTER(alg) \
++ crypto_register(ixp_id,alg,0,0)
++
++ REGISTER(CRYPTO_DES_CBC);
++ REGISTER(CRYPTO_3DES_CBC);
++ REGISTER(CRYPTO_RIJNDAEL128_CBC);
++#ifdef CONFIG_OCF_IXP4XX_SHA1_MD5
++ REGISTER(CRYPTO_MD5);
++ REGISTER(CRYPTO_SHA1);
++#endif
++ REGISTER(CRYPTO_MD5_HMAC);
++ REGISTER(CRYPTO_SHA1_HMAC);
++#undef REGISTER
++
++#ifdef __ixp46X
++ spin_lock_init(&ixp_pkq_lock);
++ /*
++ * we do not enable the go fast options here as they can potentially
++ * allow timing based attacks
++ *
++ * http://www.openssl.org/news/secadv_20030219.txt
++ */
++ ixCryptoAccPkeEauExpConfig(0, 0);
++ crypto_kregister(ixp_id, CRK_MOD_EXP, 0);
++#ifdef CONFIG_OCF_RANDOMHARVEST
++ crypto_rregister(ixp_id, ixp_read_random, NULL);
++#endif
++#endif
++
++ return 0;
++}
++
++static void
++ixp_exit(void)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ crypto_unregister_all(ixp_id);
++ ixp_id = -1;
++ kmem_cache_destroy(qcache);
++ qcache = NULL;
++}
++
++module_init(ixp_init);
++module_exit(ixp_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("David McCullough <dmccullough@cyberguard.com>");
++MODULE_DESCRIPTION("ixp (OCF module for IXP4xx crypto)");
+diff -Nur linux-2.6.30.orig/crypto/ocf/ixp4xx/Makefile linux-2.6.30/crypto/ocf/ixp4xx/Makefile
+--- linux-2.6.30.orig/crypto/ocf/ixp4xx/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ixp4xx/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,104 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++#
++# You will need to point this at your Intel ixp425 includes, this portion
++# of the Makefile only really works under SGLinux with the appropriate libs
++# installed. They can be downloaded from http://www.snapgear.org/
++#
++ifeq ($(CONFIG_CPU_IXP46X),y)
++IXPLATFORM = ixp46X
++else
++ifeq ($(CONFIG_CPU_IXP43X),y)
++IXPLATFORM = ixp43X
++else
++IXPLATFORM = ixp42X
++endif
++endif
++
++ifdef CONFIG_IXP400_LIB_2_4
++IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.4/ixp400_xscale_sw
++OSAL_DIR = $(ROOTDIR)/modules/ixp425/ixp400-2.4/ixp_osal
++endif
++ifdef CONFIG_IXP400_LIB_2_1
++IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.1/ixp400_xscale_sw
++OSAL_DIR = $(ROOTDIR)/modules/ixp425/ixp400-2.1/ixp_osal
++endif
++ifdef CONFIG_IXP400_LIB_2_0
++IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.0/ixp400_xscale_sw
++OSAL_DIR = $(ROOTDIR)/modules/ixp425/ixp400-2.0/ixp_osal
++endif
++ifdef IX_XSCALE_SW
++ifdef CONFIG_IXP400_LIB_2_4
++IXP_CFLAGS = \
++ -I$(ROOTDIR)/. \
++ -I$(IX_XSCALE_SW)/src/include \
++ -I$(OSAL_DIR)/common/include/ \
++ -I$(OSAL_DIR)/common/include/modules/ \
++ -I$(OSAL_DIR)/common/include/modules/ddk/ \
++ -I$(OSAL_DIR)/common/include/modules/bufferMgt/ \
++ -I$(OSAL_DIR)/common/include/modules/ioMem/ \
++ -I$(OSAL_DIR)/common/os/linux/include/ \
++ -I$(OSAL_DIR)/common/os/linux/include/core/ \
++ -I$(OSAL_DIR)/common/os/linux/include/modules/ \
++ -I$(OSAL_DIR)/common/os/linux/include/modules/ddk/ \
++ -I$(OSAL_DIR)/common/os/linux/include/modules/bufferMgt/ \
++ -I$(OSAL_DIR)/common/os/linux/include/modules/ioMem/ \
++ -I$(OSAL_DIR)/platforms/$(IXPLATFORM)/include/ \
++ -I$(OSAL_DIR)/platforms/$(IXPLATFORM)/os/linux/include/ \
++ -DENABLE_IOMEM -DENABLE_BUFFERMGT -DENABLE_DDK \
++ -DUSE_IXP4XX_CRYPTO
++else
++IXP_CFLAGS = \
++ -I$(ROOTDIR)/. \
++ -I$(IX_XSCALE_SW)/src/include \
++ -I$(OSAL_DIR)/ \
++ -I$(OSAL_DIR)/os/linux/include/ \
++ -I$(OSAL_DIR)/os/linux/include/modules/ \
++ -I$(OSAL_DIR)/os/linux/include/modules/ioMem/ \
++ -I$(OSAL_DIR)/os/linux/include/modules/bufferMgt/ \
++ -I$(OSAL_DIR)/os/linux/include/core/ \
++ -I$(OSAL_DIR)/os/linux/include/platforms/ \
++ -I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ \
++ -I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ixp425 \
++ -I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ixp465 \
++ -I$(OSAL_DIR)/os/linux/include/core/ \
++ -I$(OSAL_DIR)/include/ \
++ -I$(OSAL_DIR)/include/modules/ \
++ -I$(OSAL_DIR)/include/modules/bufferMgt/ \
++ -I$(OSAL_DIR)/include/modules/ioMem/ \
++ -I$(OSAL_DIR)/include/platforms/ \
++ -I$(OSAL_DIR)/include/platforms/ixp400/ \
++ -DUSE_IXP4XX_CRYPTO
++endif
++endif
++ifdef CONFIG_IXP400_LIB_1_4
++IXP_CFLAGS = \
++ -I$(ROOTDIR)/. \
++ -I$(ROOTDIR)/modules/ixp425/ixp400-1.4/ixp400_xscale_sw/src/include \
++ -I$(ROOTDIR)/modules/ixp425/ixp400-1.4/ixp400_xscale_sw/src/linux \
++ -DUSE_IXP4XX_CRYPTO
++endif
++ifndef IXPDIR
++IXPDIR = ixp-version-is-not-supported
++endif
++
++ifeq ($(CONFIG_CPU_IXP46X),y)
++IXP_CFLAGS += -D__ixp46X
++else
++ifeq ($(CONFIG_CPU_IXP43X),y)
++IXP_CFLAGS += -D__ixp43X
++else
++IXP_CFLAGS += -D__ixp42X
++endif
++endif
++
++obj-$(CONFIG_OCF_IXP4XX) += ixp4xx.o
++
++obj ?= .
++EXTRA_CFLAGS += $(IXP_CFLAGS) -I$(obj)/.. -I$(obj)/.
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/Kconfig linux-2.6.30/crypto/ocf/Kconfig
+--- linux-2.6.30.orig/crypto/ocf/Kconfig 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/Kconfig 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,101 @@
++menu "OCF Configuration"
++
++config OCF_OCF
++ tristate "OCF (Open Cryptograhic Framework)"
++ help
++ A linux port of the OpenBSD/FreeBSD crypto framework.
++
++config OCF_RANDOMHARVEST
++ bool "crypto random --- harvest entropy for /dev/random"
++ depends on OCF_OCF
++ help
++ Includes code to harvest random numbers from devices that support it.
++
++config OCF_FIPS
++ bool "enable fips RNG checks"
++ depends on OCF_OCF && OCF_RANDOMHARVEST
++ help
++ Run all RNG provided data through a fips check before
++ adding it /dev/random's entropy pool.
++
++config OCF_CRYPTODEV
++ tristate "cryptodev (user space support)"
++ depends on OCF_OCF
++ help
++ The user space API to access crypto hardware.
++
++config OCF_CRYPTOSOFT
++ tristate "cryptosoft (software crypto engine)"
++ depends on OCF_OCF
++ help
++ A software driver for the OCF framework that uses
++ the kernel CryptoAPI.
++
++config OCF_SAFE
++ tristate "safenet (HW crypto engine)"
++ depends on OCF_OCF
++ help
++ A driver for a number of the safenet Excel crypto accelerators.
++ Currently tested and working on the 1141 and 1741.
++
++config OCF_IXP4XX
++ tristate "IXP4xx (HW crypto engine)"
++ depends on OCF_OCF
++ help
++ XScale IXP4xx crypto accelerator driver. Requires the
++ Intel Access library.
++
++config OCF_IXP4XX_SHA1_MD5
++ bool "IXP4xx SHA1 and MD5 Hashing"
++ depends on OCF_IXP4XX
++ help
++ Allows the IXP4xx crypto accelerator to perform SHA1 and MD5 hashing.
++ Note: this is MUCH slower than using cryptosoft (software crypto engine).
++
++config OCF_HIFN
++ tristate "hifn (HW crypto engine)"
++ depends on OCF_OCF
++ help
++ OCF driver for various HIFN based crypto accelerators.
++ (7951, 7955, 7956, 7751, 7811)
++
++config OCF_HIFNHIPP
++ tristate "Hifn HIPP (HW packet crypto engine)"
++ depends on OCF_OCF
++ help
++ OCF driver for various HIFN (HIPP) based crypto accelerators
++ (7855)
++
++config OCF_TALITOS
++ tristate "talitos (HW crypto engine)"
++ depends on OCF_OCF
++ help
++ OCF driver for Freescale's security engine (SEC/talitos).
++
++config OCF_PASEMI
++ tristate "pasemi (HW crypto engine)"
++ depends on OCF_OCF && PPC_PASEMI
++ help
++ OCF driver for the PA Semi PWRficient DMA Engine
++
++config OCF_EP80579
++ tristate "ep80579 (HW crypto engine)"
++ depends on OCF_OCF
++ help
++ OCF driver for the Intel EP80579 Integrated Processor Product Line.
++
++config OCF_OCFNULL
++ tristate "ocfnull (fake crypto engine)"
++ depends on OCF_OCF
++ help
++ OCF driver for measuring ipsec overheads (does no crypto)
++
++config OCF_BENCH
++ tristate "ocf-bench (HW crypto in-kernel benchmark)"
++ depends on OCF_OCF
++ help
++ A very simple encryption test for the in-kernel interface
++ of OCF. Also includes code to benchmark the IXP Access library
++ for comparison.
++
++endmenu
+diff -Nur linux-2.6.30.orig/crypto/ocf/Makefile linux-2.6.30/crypto/ocf/Makefile
+--- linux-2.6.30.orig/crypto/ocf/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,121 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++OCF_OBJS = crypto.o criov.o
++
++ifdef CONFIG_OCF_RANDOMHARVEST
++ OCF_OBJS += random.o
++endif
++
++ifdef CONFIG_OCF_FIPS
++ OCF_OBJS += rndtest.o
++endif
++
++# Add in autoconf.h to get #defines for CONFIG_xxx
++AUTOCONF_H=$(ROOTDIR)/modules/autoconf.h
++ifeq ($(AUTOCONF_H), $(wildcard $(AUTOCONF_H)))
++ EXTRA_CFLAGS += -include $(AUTOCONF_H)
++ export EXTRA_CFLAGS
++endif
++
++ifndef obj
++ obj ?= .
++ _obj = subdir
++ mod-subdirs := safe hifn ixp4xx talitos ocfnull
++ export-objs += crypto.o criov.o random.o
++ list-multi += ocf.o
++ _slash :=
++else
++ _obj = obj
++ _slash := /
++endif
++
++EXTRA_CFLAGS += -I$(obj)/.
++
++obj-$(CONFIG_OCF_OCF) += ocf.o
++obj-$(CONFIG_OCF_CRYPTODEV) += cryptodev.o
++obj-$(CONFIG_OCF_CRYPTOSOFT) += cryptosoft.o
++obj-$(CONFIG_OCF_BENCH) += ocf-bench.o
++
++$(_obj)-$(CONFIG_OCF_SAFE) += safe$(_slash)
++$(_obj)-$(CONFIG_OCF_HIFN) += hifn$(_slash)
++$(_obj)-$(CONFIG_OCF_IXP4XX) += ixp4xx$(_slash)
++$(_obj)-$(CONFIG_OCF_TALITOS) += talitos$(_slash)
++$(_obj)-$(CONFIG_OCF_PASEMI) += pasemi$(_slash)
++$(_obj)-$(CONFIG_OCF_EP80579) += ep80579$(_slash)
++$(_obj)-$(CONFIG_OCF_OCFNULL) += ocfnull$(_slash)
++
++ocf-objs := $(OCF_OBJS)
++
++$(list-multi) dummy1: $(ocf-objs)
++ $(LD) -r -o $@ $(ocf-objs)
++
++.PHONY:
++clean:
++ rm -f *.o *.ko .*.o.flags .*.ko.cmd .*.o.cmd .*.mod.o.cmd *.mod.c
++ rm -f */*.o */*.ko */.*.o.cmd */.*.ko.cmd */.*.mod.o.cmd */*.mod.c */.*.o.flags
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
++#
++# release gen targets
++#
++
++.PHONY: patch
++patch:
++ REL=`date +%Y%m%d`; \
++ patch=ocf-linux-$$REL.patch; \
++ patch24=ocf-linux-24-$$REL.patch; \
++ patch26=ocf-linux-26-$$REL.patch; \
++ ( \
++ find . -name Makefile; \
++ find . -name Config.in; \
++ find . -name Kconfig; \
++ find . -name README; \
++ find . -name '*.[ch]' | grep -v '.mod.c'; \
++ ) | while read t; do \
++ diff -Nau /dev/null $$t | sed 's?^+++ \./?+++ linux/crypto/ocf/?'; \
++ done > $$patch; \
++ cat patches/linux-2.4.35-ocf.patch $$patch > $$patch24; \
++ cat patches/linux-2.6.26-ocf.patch $$patch > $$patch26
++
++.PHONY: tarball
++tarball:
++ REL=`date +%Y%m%d`; RELDIR=/tmp/ocf-linux-$$REL; \
++ CURDIR=`pwd`; \
++ rm -rf /tmp/ocf-linux-$$REL*; \
++ mkdir -p $$RELDIR/tools; \
++ cp README* $$RELDIR; \
++ cp patches/openss*.patch $$RELDIR; \
++ cp patches/crypto-tools.patch $$RELDIR; \
++ cp tools/[!C]* $$RELDIR/tools; \
++ cd ..; \
++ tar cvf $$RELDIR/ocf-linux.tar \
++ --exclude=CVS \
++ --exclude=.* \
++ --exclude=*.o \
++ --exclude=*.ko \
++ --exclude=*.mod.* \
++ --exclude=README* \
++ --exclude=ocf-*.patch \
++ --exclude=ocf/patches/openss*.patch \
++ --exclude=ocf/patches/crypto-tools.patch \
++ --exclude=ocf/tools \
++ ocf; \
++ gzip -9 $$RELDIR/ocf-linux.tar; \
++ cd /tmp; \
++ tar cvf ocf-linux-$$REL.tar ocf-linux-$$REL; \
++ gzip -9 ocf-linux-$$REL.tar; \
++ cd $$CURDIR/../../user; \
++ rm -rf /tmp/crypto-tools-$$REL*; \
++ tar cvf /tmp/crypto-tools-$$REL.tar \
++ --exclude=CVS \
++ --exclude=.* \
++ --exclude=*.o \
++ --exclude=cryptotest \
++ --exclude=cryptokeytest \
++ crypto-tools; \
++ gzip -9 /tmp/crypto-tools-$$REL.tar
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/ocf-bench.c linux-2.6.30/crypto/ocf/ocf-bench.c
+--- linux-2.6.30.orig/crypto/ocf/ocf-bench.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ocf-bench.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,436 @@
++/*
++ * A loadable module that benchmarks the OCF crypto speed from kernel space.
++ *
++ * Copyright (C) 2004-2007 David McCullough <david_mccullough@securecomputing.com>
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ */
++
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/spinlock.h>
++#include <linux/version.h>
++#include <linux/interrupt.h>
++#include <cryptodev.h>
++
++#ifdef I_HAVE_AN_XSCALE_WITH_INTEL_SDK
++#define BENCH_IXP_ACCESS_LIB 1
++#endif
++#ifdef BENCH_IXP_ACCESS_LIB
++#include <IxTypes.h>
++#include <IxOsBuffMgt.h>
++#include <IxNpeDl.h>
++#include <IxCryptoAcc.h>
++#include <IxQMgr.h>
++#include <IxOsServices.h>
++#include <IxOsCacheMMU.h>
++#endif
++
++/*
++ * support for access lib version 1.4
++ */
++#ifndef IX_MBUF_PRIV
++#define IX_MBUF_PRIV(x) ((x)->priv)
++#endif
++
++/*
++ * the number of simultaneously active requests
++ */
++static int request_q_len = 20;
++module_param(request_q_len, int, 0);
++MODULE_PARM_DESC(request_q_len, "Number of outstanding requests");
++/*
++ * how many requests we want to have processed
++ */
++static int request_num = 1024;
++module_param(request_num, int, 0);
++MODULE_PARM_DESC(request_num, "run for at least this many requests");
++/*
++ * the size of each request
++ */
++static int request_size = 1500;
++module_param(request_size, int, 0);
++MODULE_PARM_DESC(request_size, "size of each request");
++
++/*
++ * a structure for each request
++ */
++typedef struct {
++ struct work_struct work;
++#ifdef BENCH_IXP_ACCESS_LIB
++ IX_MBUF mbuf;
++#endif
++ unsigned char *buffer;
++} request_t;
++
++static request_t *requests;
++
++static int outstanding;
++static int total;
++
++/*************************************************************************/
++/*
++ * OCF benchmark routines
++ */
++
++static uint64_t ocf_cryptoid;
++static int ocf_init(void);
++static int ocf_cb(struct cryptop *crp);
++static void ocf_request(void *arg);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void ocf_request_wq(struct work_struct *work);
++#endif
++
++static int
++ocf_init(void)
++{
++ int error;
++ struct cryptoini crie, cria;
++ struct cryptodesc crda, crde;
++
++ memset(&crie, 0, sizeof(crie));
++ memset(&cria, 0, sizeof(cria));
++ memset(&crde, 0, sizeof(crde));
++ memset(&crda, 0, sizeof(crda));
++
++ cria.cri_alg = CRYPTO_SHA1_HMAC;
++ cria.cri_klen = 20 * 8;
++ cria.cri_key = "0123456789abcdefghij";
++
++ crie.cri_alg = CRYPTO_3DES_CBC;
++ crie.cri_klen = 24 * 8;
++ crie.cri_key = "0123456789abcdefghijklmn";
++
++ crie.cri_next = &cria;
++
++ error = crypto_newsession(&ocf_cryptoid, &crie, 0);
++ if (error) {
++ printk("crypto_newsession failed %d\n", error);
++ return -1;
++ }
++ return 0;
++}
++
++static int
++ocf_cb(struct cryptop *crp)
++{
++ request_t *r = (request_t *) crp->crp_opaque;
++
++ if (crp->crp_etype)
++ printk("Error in OCF processing: %d\n", crp->crp_etype);
++ total++;
++ crypto_freereq(crp);
++ crp = NULL;
++
++ if (total > request_num) {
++ outstanding--;
++ return 0;
++ }
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&r->work, ocf_request_wq);
++#else
++ INIT_WORK(&r->work, ocf_request, r);
++#endif
++ schedule_work(&r->work);
++ return 0;
++}
++
++
++static void
++ocf_request(void *arg)
++{
++ request_t *r = arg;
++ struct cryptop *crp = crypto_getreq(2);
++ struct cryptodesc *crde, *crda;
++
++ if (!crp) {
++ outstanding--;
++ return;
++ }
++
++ crde = crp->crp_desc;
++ crda = crde->crd_next;
++
++ crda->crd_skip = 0;
++ crda->crd_flags = 0;
++ crda->crd_len = request_size;
++ crda->crd_inject = request_size;
++ crda->crd_alg = CRYPTO_SHA1_HMAC;
++ crda->crd_key = "0123456789abcdefghij";
++ crda->crd_klen = 20 * 8;
++
++ crde->crd_skip = 0;
++ crde->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_ENCRYPT;
++ crde->crd_len = request_size;
++ crde->crd_inject = request_size;
++ crde->crd_alg = CRYPTO_3DES_CBC;
++ crde->crd_key = "0123456789abcdefghijklmn";
++ crde->crd_klen = 24 * 8;
++
++ crp->crp_ilen = request_size + 64;
++ crp->crp_flags = CRYPTO_F_CBIMM;
++ crp->crp_buf = (caddr_t) r->buffer;
++ crp->crp_callback = ocf_cb;
++ crp->crp_sid = ocf_cryptoid;
++ crp->crp_opaque = (caddr_t) r;
++ crypto_dispatch(crp);
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void
++ocf_request_wq(struct work_struct *work)
++{
++ request_t *r = container_of(work, request_t, work);
++ ocf_request(r);
++}
++#endif
++
++/*************************************************************************/
++#ifdef BENCH_IXP_ACCESS_LIB
++/*************************************************************************/
++/*
++ * CryptoAcc benchmark routines
++ */
++
++static IxCryptoAccCtx ixp_ctx;
++static UINT32 ixp_ctx_id;
++static IX_MBUF ixp_pri;
++static IX_MBUF ixp_sec;
++static int ixp_registered = 0;
++
++static void ixp_register_cb(UINT32 ctx_id, IX_MBUF *bufp,
++ IxCryptoAccStatus status);
++static void ixp_perform_cb(UINT32 ctx_id, IX_MBUF *sbufp, IX_MBUF *dbufp,
++ IxCryptoAccStatus status);
++static void ixp_request(void *arg);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void ixp_request_wq(struct work_struct *work);
++#endif
++
++static int
++ixp_init(void)
++{
++ IxCryptoAccStatus status;
++
++ ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_3DES;
++ ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
++ ixp_ctx.cipherCtx.cipherKeyLen = 24;
++ ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
++ ixp_ctx.cipherCtx.cipherInitialVectorLen = IX_CRYPTO_ACC_DES_IV_64;
++ memcpy(ixp_ctx.cipherCtx.key.cipherKey, "0123456789abcdefghijklmn", 24);
++
++ ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_SHA1;
++ ixp_ctx.authCtx.authDigestLen = 12;
++ ixp_ctx.authCtx.aadLen = 0;
++ ixp_ctx.authCtx.authKeyLen = 20;
++ memcpy(ixp_ctx.authCtx.key.authKey, "0123456789abcdefghij", 20);
++
++ ixp_ctx.useDifferentSrcAndDestMbufs = 0;
++ ixp_ctx.operation = IX_CRYPTO_ACC_OP_ENCRYPT_AUTH ;
++
++ IX_MBUF_MLEN(&ixp_pri) = IX_MBUF_PKT_LEN(&ixp_pri) = 128;
++ IX_MBUF_MDATA(&ixp_pri) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
++ IX_MBUF_MLEN(&ixp_sec) = IX_MBUF_PKT_LEN(&ixp_sec) = 128;
++ IX_MBUF_MDATA(&ixp_sec) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
++
++ status = ixCryptoAccCtxRegister(&ixp_ctx, &ixp_pri, &ixp_sec,
++ ixp_register_cb, ixp_perform_cb, &ixp_ctx_id);
++
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS == status) {
++ while (!ixp_registered)
++ schedule();
++ return ixp_registered < 0 ? -1 : 0;
++ }
++
++ printk("ixp: ixCryptoAccCtxRegister failed %d\n", status);
++ return -1;
++}
++
++static void
++ixp_register_cb(UINT32 ctx_id, IX_MBUF *bufp, IxCryptoAccStatus status)
++{
++ if (bufp) {
++ IX_MBUF_MLEN(bufp) = IX_MBUF_PKT_LEN(bufp) = 0;
++ kfree(IX_MBUF_MDATA(bufp));
++ IX_MBUF_MDATA(bufp) = NULL;
++ }
++
++ if (IX_CRYPTO_ACC_STATUS_WAIT == status)
++ return;
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
++ ixp_registered = 1;
++ else
++ ixp_registered = -1;
++}
++
++static void
++ixp_perform_cb(
++ UINT32 ctx_id,
++ IX_MBUF *sbufp,
++ IX_MBUF *dbufp,
++ IxCryptoAccStatus status)
++{
++ request_t *r = NULL;
++
++ total++;
++ if (total > request_num) {
++ outstanding--;
++ return;
++ }
++
++ if (!sbufp || !(r = IX_MBUF_PRIV(sbufp))) {
++ printk("crappo %p %p\n", sbufp, r);
++ outstanding--;
++ return;
++ }
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&r->work, ixp_request_wq);
++#else
++ INIT_WORK(&r->work, ixp_request, r);
++#endif
++ schedule_work(&r->work);
++}
++
++static void
++ixp_request(void *arg)
++{
++ request_t *r = arg;
++ IxCryptoAccStatus status;
++
++ memset(&r->mbuf, 0, sizeof(r->mbuf));
++ IX_MBUF_MLEN(&r->mbuf) = IX_MBUF_PKT_LEN(&r->mbuf) = request_size + 64;
++ IX_MBUF_MDATA(&r->mbuf) = r->buffer;
++ IX_MBUF_PRIV(&r->mbuf) = r;
++ status = ixCryptoAccAuthCryptPerform(ixp_ctx_id, &r->mbuf, NULL,
++ 0, request_size, 0, request_size, request_size, r->buffer);
++ if (IX_CRYPTO_ACC_STATUS_SUCCESS != status) {
++ printk("status1 = %d\n", status);
++ outstanding--;
++ return;
++ }
++ return;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void
++ixp_request_wq(struct work_struct *work)
++{
++ request_t *r = container_of(work, request_t, work);
++ ixp_request(r);
++}
++#endif
++
++/*************************************************************************/
++#endif /* BENCH_IXP_ACCESS_LIB */
++/*************************************************************************/
++
++int
++ocfbench_init(void)
++{
++ int i, jstart, jstop;
++
++ printk("Crypto Speed tests\n");
++
++ requests = kmalloc(sizeof(request_t) * request_q_len, GFP_KERNEL);
++ if (!requests) {
++ printk("malloc failed\n");
++ return -EINVAL;
++ }
++
++ for (i = 0; i < request_q_len; i++) {
++ /* +64 for return data */
++ requests[i].buffer = kmalloc(request_size + 128, GFP_DMA);
++ if (!requests[i].buffer) {
++ printk("malloc failed\n");
++ return -EINVAL;
++ }
++ memset(requests[i].buffer, '0' + i, request_size + 128);
++ }
++
++ /*
++ * OCF benchmark
++ */
++ printk("OCF: testing ...\n");
++ ocf_init();
++ total = outstanding = 0;
++ jstart = jiffies;
++ for (i = 0; i < request_q_len; i++) {
++ outstanding++;
++ ocf_request(&requests[i]);
++ }
++ while (outstanding > 0)
++ schedule();
++ jstop = jiffies;
++
++ printk("OCF: %d requests of %d bytes in %d jiffies\n", total, request_size,
++ jstop - jstart);
++
++#ifdef BENCH_IXP_ACCESS_LIB
++ /*
++ * IXP benchmark
++ */
++ printk("IXP: testing ...\n");
++ ixp_init();
++ total = outstanding = 0;
++ jstart = jiffies;
++ for (i = 0; i < request_q_len; i++) {
++ outstanding++;
++ ixp_request(&requests[i]);
++ }
++ while (outstanding > 0)
++ schedule();
++ jstop = jiffies;
++
++ printk("IXP: %d requests of %d bytes in %d jiffies\n", total, request_size,
++ jstop - jstart);
++#endif /* BENCH_IXP_ACCESS_LIB */
++
++ for (i = 0; i < request_q_len; i++)
++ kfree(requests[i].buffer);
++ kfree(requests);
++ return -EINVAL; /* always fail to load so it can be re-run quickly ;-) */
++}
++
++static void __exit ocfbench_exit(void)
++{
++}
++
++module_init(ocfbench_init);
++module_exit(ocfbench_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("Benchmark various in-kernel crypto speeds");
+diff -Nur linux-2.6.30.orig/crypto/ocf/ocf-compat.h linux-2.6.30/crypto/ocf/ocf-compat.h
+--- linux-2.6.30.orig/crypto/ocf/ocf-compat.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ocf-compat.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,270 @@
++#ifndef _BSD_COMPAT_H_
++#define _BSD_COMPAT_H_ 1
++/****************************************************************************/
++/*
++ * Provide compat routines for older linux kernels and BSD kernels
++ *
++ * Written by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2007 David McCullough <david_mccullough@securecomputing.com>
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this file
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ */
++/****************************************************************************/
++#ifdef __KERNEL__
++/*
++ * fake some BSD driver interface stuff specifically for OCF use
++ */
++
++typedef struct ocf_device *device_t;
++
++typedef struct {
++ int (*cryptodev_newsession)(device_t dev, u_int32_t *sidp, struct cryptoini *cri);
++ int (*cryptodev_freesession)(device_t dev, u_int64_t tid);
++ int (*cryptodev_process)(device_t dev, struct cryptop *crp, int hint);
++ int (*cryptodev_kprocess)(device_t dev, struct cryptkop *krp, int hint);
++} device_method_t;
++#define DEVMETHOD(id, func) id: func
++
++struct ocf_device {
++ char name[32]; /* the driver name */
++ char nameunit[32]; /* the driver name + HW instance */
++ int unit;
++ device_method_t methods;
++ void *softc;
++};
++
++#define CRYPTODEV_NEWSESSION(dev, sid, cri) \
++ ((*(dev)->methods.cryptodev_newsession)(dev,sid,cri))
++#define CRYPTODEV_FREESESSION(dev, sid) \
++ ((*(dev)->methods.cryptodev_freesession)(dev, sid))
++#define CRYPTODEV_PROCESS(dev, crp, hint) \
++ ((*(dev)->methods.cryptodev_process)(dev, crp, hint))
++#define CRYPTODEV_KPROCESS(dev, krp, hint) \
++ ((*(dev)->methods.cryptodev_kprocess)(dev, krp, hint))
++
++#define device_get_name(dev) ((dev)->name)
++#define device_get_nameunit(dev) ((dev)->nameunit)
++#define device_get_unit(dev) ((dev)->unit)
++#define device_get_softc(dev) ((dev)->softc)
++
++#define softc_device_decl \
++ struct ocf_device _device; \
++ device_t
++
++#define softc_device_init(_sc, _name, _unit, _methods) \
++ if (1) {\
++ strncpy((_sc)->_device.name, _name, sizeof((_sc)->_device.name) - 1); \
++ snprintf((_sc)->_device.nameunit, sizeof((_sc)->_device.name), "%s%d", _name, _unit); \
++ (_sc)->_device.unit = _unit; \
++ (_sc)->_device.methods = _methods; \
++ (_sc)->_device.softc = (void *) _sc; \
++ *(device_t *)((softc_get_device(_sc))+1) = &(_sc)->_device; \
++ } else
++
++#define softc_get_device(_sc) (&(_sc)->_device)
++
++/*
++ * iomem support for 2.4 and 2.6 kernels
++ */
++#include <linux/version.h>
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++#define ocf_iomem_t unsigned long
++
++/*
++ * implement simple workqueue like support for older kernels
++ */
++
++#include <linux/tqueue.h>
++
++#define work_struct tq_struct
++
++#define INIT_WORK(wp, fp, ap) \
++ do { \
++ (wp)->sync = 0; \
++ (wp)->routine = (fp); \
++ (wp)->data = (ap); \
++ } while (0)
++
++#define schedule_work(wp) \
++ do { \
++ queue_task((wp), &tq_immediate); \
++ mark_bh(IMMEDIATE_BH); \
++ } while (0)
++
++#define flush_scheduled_work() run_task_queue(&tq_immediate)
++
++#else
++#define ocf_iomem_t void __iomem *
++
++#include <linux/workqueue.h>
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
++#include <linux/fdtable.h>
++#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
++#define files_fdtable(files) (files)
++#endif
++
++#ifdef MODULE_PARM
++#undef module_param /* just in case */
++#define module_param(a,b,c) MODULE_PARM(a,"i")
++#endif
++
++#define bzero(s,l) memset(s,0,l)
++#define bcopy(s,d,l) memcpy(d,s,l)
++#define bcmp(x, y, l) memcmp(x,y,l)
++
++#define MIN(x,y) ((x) < (y) ? (x) : (y))
++
++#define device_printf(dev, a...) ({ \
++ printk("%s: ", device_get_nameunit(dev)); printk(a); \
++ })
++
++#undef printf
++#define printf(fmt...) printk(fmt)
++
++#define KASSERT(c,p) if (!(c)) { printk p ; } else
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++#define ocf_daemonize(str) \
++ daemonize(); \
++ spin_lock_irq(&current->sigmask_lock); \
++ sigemptyset(&current->blocked); \
++ recalc_sigpending(current); \
++ spin_unlock_irq(&current->sigmask_lock); \
++ sprintf(current->comm, str);
++#else
++#define ocf_daemonize(str) daemonize(str);
++#endif
++
++#define TAILQ_INSERT_TAIL(q,d,m) list_add_tail(&(d)->m, (q))
++#define TAILQ_EMPTY(q) list_empty(q)
++#define TAILQ_FOREACH(v, q, m) list_for_each_entry(v, q, m)
++
++#define read_random(p,l) get_random_bytes(p,l)
++
++#define DELAY(x) ((x) > 2000 ? mdelay((x)/1000) : udelay(x))
++#define strtoul simple_strtoul
++
++#define pci_get_vendor(dev) ((dev)->vendor)
++#define pci_get_device(dev) ((dev)->device)
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++#define pci_set_consistent_dma_mask(dev, mask) (0)
++#endif
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
++#define pci_dma_sync_single_for_cpu pci_dma_sync_single
++#endif
++
++#ifndef DMA_32BIT_MASK
++#define DMA_32BIT_MASK 0x00000000ffffffffULL
++#endif
++
++#define htole32(x) cpu_to_le32(x)
++#define htobe32(x) cpu_to_be32(x)
++#define htole16(x) cpu_to_le16(x)
++#define htobe16(x) cpu_to_be16(x)
++
++/* older kernels don't have these */
++
++#ifndef IRQ_NONE
++#define IRQ_NONE
++#define IRQ_HANDLED
++#define irqreturn_t void
++#endif
++#ifndef IRQF_SHARED
++#define IRQF_SHARED SA_SHIRQ
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
++# define strlcpy(dest,src,len) \
++ ({strncpy(dest,src,(len)-1); ((char *)dest)[(len)-1] = '\0'; })
++#endif
++
++#ifndef MAX_ERRNO
++#define MAX_ERRNO 4095
++#endif
++#ifndef IS_ERR_VALUE
++#define IS_ERR_VALUE(x) ((unsigned long)(x) >= (unsigned long)-MAX_ERRNO)
++#endif
++
++/*
++ * common debug for all
++ */
++#if 1
++#define dprintk(a...) do { if (debug) printk(a); } while(0)
++#else
++#define dprintk(a...)
++#endif
++
++#ifndef SLAB_ATOMIC
++/* Changed in 2.6.20, must use GFP_ATOMIC now */
++#define SLAB_ATOMIC GFP_ATOMIC
++#endif
++
++/*
++ * need some additional support for older kernels */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,2)
++#define pci_register_driver_compat(driver, rc) \
++ do { \
++ if ((rc) > 0) { \
++ (rc) = 0; \
++ } else if (rc == 0) { \
++ (rc) = -ENODEV; \
++ } else { \
++ pci_unregister_driver(driver); \
++ } \
++ } while (0)
++#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
++#define pci_register_driver_compat(driver,rc) ((rc) = (rc) < 0 ? (rc) : 0)
++#else
++#define pci_register_driver_compat(driver,rc)
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
++
++#include <asm/scatterlist.h>
++
++static inline void sg_set_page(struct scatterlist *sg, struct page *page,
++ unsigned int len, unsigned int offset)
++{
++ sg->page = page;
++ sg->offset = offset;
++ sg->length = len;
++}
++
++static inline void *sg_virt(struct scatterlist *sg)
++{
++ return page_address(sg->page) + sg->offset;
++}
++
++#endif
++
++#endif /* __KERNEL__ */
++
++/****************************************************************************/
++#endif /* _BSD_COMPAT_H_ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/ocfnull/Makefile linux-2.6.30/crypto/ocf/ocfnull/Makefile
+--- linux-2.6.30.orig/crypto/ocf/ocfnull/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ocfnull/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,12 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++obj-$(CONFIG_OCF_OCFNULL) += ocfnull.o
++
++obj ?= .
++EXTRA_CFLAGS += -I$(obj)/..
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/ocfnull/ocfnull.c linux-2.6.30/crypto/ocf/ocfnull/ocfnull.c
+--- linux-2.6.30.orig/crypto/ocf/ocfnull/ocfnull.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/ocfnull/ocfnull.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,203 @@
++/*
++ * An OCF module for determining the cost of crypto versus the cost of
++ * IPSec processing outside of OCF. This modules gives us the effect of
++ * zero cost encryption, of course you will need to run it at both ends
++ * since it does no crypto at all.
++ *
++ * Written by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/sched.h>
++#include <linux/wait.h>
++#include <linux/crypto.h>
++#include <linux/interrupt.h>
++
++#include <cryptodev.h>
++#include <uio.h>
++
++static int32_t null_id = -1;
++static u_int32_t null_sesnum = 0;
++
++static int null_process(device_t, struct cryptop *, int);
++static int null_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int null_freesession(device_t, u_int64_t);
++
++#define debug ocfnull_debug
++int ocfnull_debug = 0;
++module_param(ocfnull_debug, int, 0644);
++MODULE_PARM_DESC(ocfnull_debug, "Enable debug");
++
++/*
++ * dummy device structure
++ */
++
++static struct {
++ softc_device_decl sc_dev;
++} nulldev;
++
++static device_method_t null_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, null_newsession),
++ DEVMETHOD(cryptodev_freesession,null_freesession),
++ DEVMETHOD(cryptodev_process, null_process),
++};
++
++/*
++ * Generate a new software session.
++ */
++static int
++null_newsession(device_t arg, u_int32_t *sid, struct cryptoini *cri)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ if (sid == NULL || cri == NULL) {
++ dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ if (null_sesnum == 0)
++ null_sesnum++;
++ *sid = null_sesnum++;
++ return 0;
++}
++
++
++/*
++ * Free a session.
++ */
++static int
++null_freesession(device_t arg, u_int64_t tid)
++{
++ u_int32_t sid = CRYPTO_SESID2LID(tid);
++
++ dprintk("%s()\n", __FUNCTION__);
++ if (sid > null_sesnum) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ /* Silently accept and return */
++ if (sid == 0)
++ return 0;
++ return 0;
++}
++
++
++/*
++ * Process a request.
++ */
++static int
++null_process(device_t arg, struct cryptop *crp, int hint)
++{
++ unsigned int lid;
++
++ dprintk("%s()\n", __FUNCTION__);
++
++ /* Sanity check */
++ if (crp == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++
++ crp->crp_etype = 0;
++
++ if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
++ dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
++ crp->crp_etype = EINVAL;
++ goto done;
++ }
++
++ /*
++ * find the session we are using
++ */
++
++ lid = crp->crp_sid & 0xffffffff;
++ if (lid >= null_sesnum || lid == 0) {
++ crp->crp_etype = ENOENT;
++ dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
++ goto done;
++ }
++
++done:
++ crypto_done(crp);
++ return 0;
++}
++
++
++/*
++ * our driver startup and shutdown routines
++ */
++
++static int
++null_init(void)
++{
++ dprintk("%s(%p)\n", __FUNCTION__, null_init);
++
++ memset(&nulldev, 0, sizeof(nulldev));
++ softc_device_init(&nulldev, "ocfnull", 0, null_methods);
++
++ null_id = crypto_get_driverid(softc_get_device(&nulldev),
++ CRYPTOCAP_F_HARDWARE);
++ if (null_id < 0)
++ panic("ocfnull: crypto device cannot initialize!");
++
++#define REGISTER(alg) \
++ crypto_register(null_id,alg,0,0)
++ REGISTER(CRYPTO_DES_CBC);
++ REGISTER(CRYPTO_3DES_CBC);
++ REGISTER(CRYPTO_RIJNDAEL128_CBC);
++ REGISTER(CRYPTO_MD5);
++ REGISTER(CRYPTO_SHA1);
++ REGISTER(CRYPTO_MD5_HMAC);
++ REGISTER(CRYPTO_SHA1_HMAC);
++#undef REGISTER
++
++ return 0;
++}
++
++static void
++null_exit(void)
++{
++ dprintk("%s()\n", __FUNCTION__);
++ crypto_unregister_all(null_id);
++ null_id = -1;
++}
++
++module_init(null_init);
++module_exit(null_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("ocfnull - claims a lot but does nothing");
+diff -Nur linux-2.6.30.orig/crypto/ocf/pasemi/Makefile linux-2.6.30/crypto/ocf/pasemi/Makefile
+--- linux-2.6.30.orig/crypto/ocf/pasemi/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/pasemi/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,12 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++obj-$(CONFIG_OCF_PASEMI) += pasemi.o
++
++obj ?= .
++EXTRA_CFLAGS += -I$(obj)/.. -I$(obj)/
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/pasemi/pasemi.c linux-2.6.30/crypto/ocf/pasemi/pasemi.c
+--- linux-2.6.30.orig/crypto/ocf/pasemi/pasemi.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/pasemi/pasemi.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1009 @@
++/*
++ * Copyright (C) 2007 PA Semi, Inc
++ *
++ * Driver for the PA Semi PWRficient DMA Crypto Engine
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/timer.h>
++#include <linux/random.h>
++#include <linux/skbuff.h>
++#include <asm/scatterlist.h>
++#include <linux/moduleparam.h>
++#include <linux/pci.h>
++#include <cryptodev.h>
++#include <uio.h>
++#include "pasemi_fnu.h"
++
++#define DRV_NAME "pasemi"
++
++#define TIMER_INTERVAL 1000
++
++static void __devexit pasemi_dma_remove(struct pci_dev *pdev);
++static struct pasdma_status volatile * dma_status;
++
++static int debug;
++module_param(debug, int, 0644);
++MODULE_PARM_DESC(debug, "Enable debug");
++
++static void pasemi_desc_start(struct pasemi_desc *desc, u64 hdr)
++{
++ desc->postop = 0;
++ desc->quad[0] = hdr;
++ desc->quad_cnt = 1;
++ desc->size = 1;
++}
++
++static void pasemi_desc_build(struct pasemi_desc *desc, u64 val)
++{
++ desc->quad[desc->quad_cnt++] = val;
++ desc->size = (desc->quad_cnt + 1) / 2;
++}
++
++static void pasemi_desc_hdr(struct pasemi_desc *desc, u64 hdr)
++{
++ desc->quad[0] |= hdr;
++}
++
++static int pasemi_desc_size(struct pasemi_desc *desc)
++{
++ return desc->size;
++}
++
++static void pasemi_ring_add_desc(
++ struct pasemi_fnu_txring *ring,
++ struct pasemi_desc *desc,
++ struct cryptop *crp) {
++ int i;
++ int ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1));
++
++ TX_DESC_INFO(ring, ring->next_to_fill).desc_size = desc->size;
++ TX_DESC_INFO(ring, ring->next_to_fill).desc_postop = desc->postop;
++ TX_DESC_INFO(ring, ring->next_to_fill).cf_crp = crp;
++
++ for (i = 0; i < desc->quad_cnt; i += 2) {
++ ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1));
++ ring->desc[ring_index] = desc->quad[i];
++ ring->desc[ring_index + 1] = desc->quad[i + 1];
++ ring->next_to_fill++;
++ }
++
++ if (desc->quad_cnt & 1)
++ ring->desc[ring_index + 1] = 0;
++}
++
++static void pasemi_ring_incr(struct pasemi_softc *sc, int chan_index, int incr)
++{
++ out_le32(sc->dma_regs + PAS_DMA_TXCHAN_INCR(sc->base_chan + chan_index),
++ incr);
++}
++
++/*
++ * Generate a new software session.
++ */
++static int
++pasemi_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
++{
++ struct cryptoini *c, *encini = NULL, *macini = NULL;
++ struct pasemi_softc *sc = device_get_softc(dev);
++ struct pasemi_session *ses = NULL, **sespp;
++ int sesn, blksz = 0;
++ u64 ccmd = 0;
++ unsigned long flags;
++ struct pasemi_desc init_desc;
++ struct pasemi_fnu_txring *txring;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ if (sidp == NULL || cri == NULL || sc == NULL) {
++ DPRINTF("%s,%d - EINVAL\n", __FILE__, __LINE__);
++ return -EINVAL;
++ }
++ for (c = cri; c != NULL; c = c->cri_next) {
++ if (ALG_IS_SIG(c->cri_alg)) {
++ if (macini)
++ return -EINVAL;
++ macini = c;
++ } else if (ALG_IS_CIPHER(c->cri_alg)) {
++ if (encini)
++ return -EINVAL;
++ encini = c;
++ } else {
++ DPRINTF("UNKNOWN c->cri_alg %d\n", c->cri_alg);
++ return -EINVAL;
++ }
++ }
++ if (encini == NULL && macini == NULL)
++ return -EINVAL;
++ if (encini) {
++ /* validate key length */
++ switch (encini->cri_alg) {
++ case CRYPTO_DES_CBC:
++ if (encini->cri_klen != 64)
++ return -EINVAL;
++ ccmd = DMA_CALGO_DES;
++ break;
++ case CRYPTO_3DES_CBC:
++ if (encini->cri_klen != 192)
++ return -EINVAL;
++ ccmd = DMA_CALGO_3DES;
++ break;
++ case CRYPTO_AES_CBC:
++ if (encini->cri_klen != 128 &&
++ encini->cri_klen != 192 &&
++ encini->cri_klen != 256)
++ return -EINVAL;
++ ccmd = DMA_CALGO_AES;
++ break;
++ case CRYPTO_ARC4:
++ if (encini->cri_klen != 128)
++ return -EINVAL;
++ ccmd = DMA_CALGO_ARC;
++ break;
++ default:
++ DPRINTF("UNKNOWN encini->cri_alg %d\n",
++ encini->cri_alg);
++ return -EINVAL;
++ }
++ }
++
++ if (macini) {
++ switch (macini->cri_alg) {
++ case CRYPTO_MD5:
++ case CRYPTO_MD5_HMAC:
++ blksz = 16;
++ break;
++ case CRYPTO_SHA1:
++ case CRYPTO_SHA1_HMAC:
++ blksz = 20;
++ break;
++ default:
++ DPRINTF("UNKNOWN macini->cri_alg %d\n",
++ macini->cri_alg);
++ return -EINVAL;
++ }
++ if (((macini->cri_klen + 7) / 8) > blksz) {
++ DPRINTF("key length %d bigger than blksize %d not supported\n",
++ ((macini->cri_klen + 7) / 8), blksz);
++ return -EINVAL;
++ }
++ }
++
++ for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
++ if (sc->sc_sessions[sesn] == NULL) {
++ sc->sc_sessions[sesn] = (struct pasemi_session *)
++ kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC);
++ ses = sc->sc_sessions[sesn];
++ break;
++ } else if (sc->sc_sessions[sesn]->used == 0) {
++ ses = sc->sc_sessions[sesn];
++ break;
++ }
++ }
++
++ if (ses == NULL) {
++ sespp = (struct pasemi_session **)
++ kzalloc(sc->sc_nsessions * 2 *
++ sizeof(struct pasemi_session *), GFP_ATOMIC);
++ if (sespp == NULL)
++ return -ENOMEM;
++ memcpy(sespp, sc->sc_sessions,
++ sc->sc_nsessions * sizeof(struct pasemi_session *));
++ kfree(sc->sc_sessions);
++ sc->sc_sessions = sespp;
++ sesn = sc->sc_nsessions;
++ ses = sc->sc_sessions[sesn] = (struct pasemi_session *)
++ kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC);
++ if (ses == NULL)
++ return -ENOMEM;
++ sc->sc_nsessions *= 2;
++ }
++
++ ses->used = 1;
++
++ ses->dma_addr = pci_map_single(sc->dma_pdev, (void *) ses->civ,
++ sizeof(struct pasemi_session), DMA_TO_DEVICE);
++
++ /* enter the channel scheduler */
++ spin_lock_irqsave(&sc->sc_chnlock, flags);
++
++ /* ARC4 has to be processed by the even channel */
++ if (encini && (encini->cri_alg == CRYPTO_ARC4))
++ ses->chan = sc->sc_lastchn & ~1;
++ else
++ ses->chan = sc->sc_lastchn;
++ sc->sc_lastchn = (sc->sc_lastchn + 1) % sc->sc_num_channels;
++
++ spin_unlock_irqrestore(&sc->sc_chnlock, flags);
++
++ txring = &sc->tx[ses->chan];
++
++ if (encini) {
++ ses->ccmd = ccmd;
++
++ /* get an IV */
++ /* XXX may read fewer than requested */
++ get_random_bytes(ses->civ, sizeof(ses->civ));
++
++ ses->keysz = (encini->cri_klen - 63) / 64;
++ memcpy(ses->key, encini->cri_key, (ses->keysz + 1) * 8);
++
++ pasemi_desc_start(&init_desc,
++ XCT_CTRL_HDR(ses->chan, (encini && macini) ? 0x68 : 0x40, DMA_FN_CIV0));
++ pasemi_desc_build(&init_desc,
++ XCT_FUN_SRC_PTR((encini && macini) ? 0x68 : 0x40, ses->dma_addr));
++ }
++ if (macini) {
++ if (macini->cri_alg == CRYPTO_MD5_HMAC ||
++ macini->cri_alg == CRYPTO_SHA1_HMAC)
++ memcpy(ses->hkey, macini->cri_key, blksz);
++ else {
++ /* Load initialization constants(RFC 1321, 3174) */
++ ses->hiv[0] = 0x67452301efcdab89ULL;
++ ses->hiv[1] = 0x98badcfe10325476ULL;
++ ses->hiv[2] = 0xc3d2e1f000000000ULL;
++ }
++ ses->hseq = 0ULL;
++ }
++
++ spin_lock_irqsave(&txring->fill_lock, flags);
++
++ if (((txring->next_to_fill + pasemi_desc_size(&init_desc)) -
++ txring->next_to_clean) > TX_RING_SIZE) {
++ spin_unlock_irqrestore(&txring->fill_lock, flags);
++ return ERESTART;
++ }
++
++ if (encini) {
++ pasemi_ring_add_desc(txring, &init_desc, NULL);
++ pasemi_ring_incr(sc, ses->chan,
++ pasemi_desc_size(&init_desc));
++ }
++
++ txring->sesn = sesn;
++ spin_unlock_irqrestore(&txring->fill_lock, flags);
++
++ *sidp = PASEMI_SID(sesn);
++ return 0;
++}
++
++/*
++ * Deallocate a session.
++ */
++static int
++pasemi_freesession(device_t dev, u_int64_t tid)
++{
++ struct pasemi_softc *sc = device_get_softc(dev);
++ int session;
++ u_int32_t sid = ((u_int32_t) tid) & 0xffffffff;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (sc == NULL)
++ return -EINVAL;
++ session = PASEMI_SESSION(sid);
++ if (session >= sc->sc_nsessions || !sc->sc_sessions[session])
++ return -EINVAL;
++
++ pci_unmap_single(sc->dma_pdev,
++ sc->sc_sessions[session]->dma_addr,
++ sizeof(struct pasemi_session), DMA_TO_DEVICE);
++ memset(sc->sc_sessions[session], 0,
++ sizeof(struct pasemi_session));
++
++ return 0;
++}
++
++static int
++pasemi_process(device_t dev, struct cryptop *crp, int hint)
++{
++
++ int err = 0, ivsize, srclen = 0, reinit = 0, reinit_size = 0, chsel;
++ struct pasemi_softc *sc = device_get_softc(dev);
++ struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
++ caddr_t ivp;
++ struct pasemi_desc init_desc, work_desc;
++ struct pasemi_session *ses;
++ struct sk_buff *skb;
++ struct uio *uiop;
++ unsigned long flags;
++ struct pasemi_fnu_txring *txring;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (crp == NULL || crp->crp_callback == NULL || sc == NULL)
++ return -EINVAL;
++
++ crp->crp_etype = 0;
++ if (PASEMI_SESSION(crp->crp_sid) >= sc->sc_nsessions)
++ return -EINVAL;
++
++ ses = sc->sc_sessions[PASEMI_SESSION(crp->crp_sid)];
++
++ crd1 = crp->crp_desc;
++ if (crd1 == NULL) {
++ err = -EINVAL;
++ goto errout;
++ }
++ crd2 = crd1->crd_next;
++
++ if (ALG_IS_SIG(crd1->crd_alg)) {
++ maccrd = crd1;
++ if (crd2 == NULL)
++ enccrd = NULL;
++ else if (ALG_IS_CIPHER(crd2->crd_alg) &&
++ (crd2->crd_flags & CRD_F_ENCRYPT) == 0)
++ enccrd = crd2;
++ else
++ goto erralg;
++ } else if (ALG_IS_CIPHER(crd1->crd_alg)) {
++ enccrd = crd1;
++ if (crd2 == NULL)
++ maccrd = NULL;
++ else if (ALG_IS_SIG(crd2->crd_alg) &&
++ (crd1->crd_flags & CRD_F_ENCRYPT))
++ maccrd = crd2;
++ else
++ goto erralg;
++ } else
++ goto erralg;
++
++ chsel = ses->chan;
++
++ txring = &sc->tx[chsel];
++
++ if (enccrd && !maccrd) {
++ if (enccrd->crd_alg == CRYPTO_ARC4)
++ reinit = 1;
++ reinit_size = 0x40;
++ srclen = crp->crp_ilen;
++
++ pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I
++ | XCT_FUN_FUN(chsel));
++ if (enccrd->crd_flags & CRD_F_ENCRYPT)
++ pasemi_desc_hdr(&work_desc, XCT_FUN_CRM_ENC);
++ else
++ pasemi_desc_hdr(&work_desc, XCT_FUN_CRM_DEC);
++ } else if (enccrd && maccrd) {
++ if (enccrd->crd_alg == CRYPTO_ARC4)
++ reinit = 1;
++ reinit_size = 0x68;
++
++ if (enccrd->crd_flags & CRD_F_ENCRYPT) {
++ /* Encrypt -> Authenticate */
++ pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_ENC_SIG
++ | XCT_FUN_A | XCT_FUN_FUN(chsel));
++ srclen = maccrd->crd_skip + maccrd->crd_len;
++ } else {
++ /* Authenticate -> Decrypt */
++ pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_SIG_DEC
++ | XCT_FUN_24BRES | XCT_FUN_FUN(chsel));
++ pasemi_desc_build(&work_desc, 0);
++ pasemi_desc_build(&work_desc, 0);
++ pasemi_desc_build(&work_desc, 0);
++ work_desc.postop = PASEMI_CHECK_SIG;
++ srclen = crp->crp_ilen;
++ }
++
++ pasemi_desc_hdr(&work_desc, XCT_FUN_SHL(maccrd->crd_skip / 4));
++ pasemi_desc_hdr(&work_desc, XCT_FUN_CHL(enccrd->crd_skip - maccrd->crd_skip));
++ } else if (!enccrd && maccrd) {
++ srclen = maccrd->crd_len;
++
++ pasemi_desc_start(&init_desc,
++ XCT_CTRL_HDR(chsel, 0x58, DMA_FN_HKEY0));
++ pasemi_desc_build(&init_desc,
++ XCT_FUN_SRC_PTR(0x58, ((struct pasemi_session *)ses->dma_addr)->hkey));
++
++ pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_SIG
++ | XCT_FUN_A | XCT_FUN_FUN(chsel));
++ }
++
++ if (enccrd) {
++ switch (enccrd->crd_alg) {
++ case CRYPTO_3DES_CBC:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_3DES |
++ XCT_FUN_BCM_CBC);
++ ivsize = sizeof(u64);
++ break;
++ case CRYPTO_DES_CBC:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_DES |
++ XCT_FUN_BCM_CBC);
++ ivsize = sizeof(u64);
++ break;
++ case CRYPTO_AES_CBC:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_AES |
++ XCT_FUN_BCM_CBC);
++ ivsize = 2 * sizeof(u64);
++ break;
++ case CRYPTO_ARC4:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_ARC);
++ ivsize = 0;
++ break;
++ default:
++ printk(DRV_NAME ": unimplemented enccrd->crd_alg %d\n",
++ enccrd->crd_alg);
++ err = -EINVAL;
++ goto errout;
++ }
++
++ ivp = (ivsize == sizeof(u64)) ? (caddr_t) &ses->civ[1] : (caddr_t) &ses->civ[0];
++ if (enccrd->crd_flags & CRD_F_ENCRYPT) {
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ memcpy(ivp, enccrd->crd_iv, ivsize);
++ /* If IV is not present in the buffer already, it has to be copied there */
++ if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0)
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize, ivp);
++ } else {
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ /* IV is provided expicitly in descriptor */
++ memcpy(ivp, enccrd->crd_iv, ivsize);
++ else
++ /* IV is provided in the packet */
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize,
++ ivp);
++ }
++ }
++
++ if (maccrd) {
++ switch (maccrd->crd_alg) {
++ case CRYPTO_MD5:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_MD5 |
++ XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4));
++ break;
++ case CRYPTO_SHA1:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_SHA1 |
++ XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4));
++ break;
++ case CRYPTO_MD5_HMAC:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_HMAC_MD5 |
++ XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4));
++ break;
++ case CRYPTO_SHA1_HMAC:
++ pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_HMAC_SHA1 |
++ XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4));
++ break;
++ default:
++ printk(DRV_NAME ": unimplemented maccrd->crd_alg %d\n",
++ maccrd->crd_alg);
++ err = -EINVAL;
++ goto errout;
++ }
++ }
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ /* using SKB buffers */
++ skb = (struct sk_buff *)crp->crp_buf;
++ if (skb_shinfo(skb)->nr_frags) {
++ printk(DRV_NAME ": skb frags unimplemented\n");
++ err = -EINVAL;
++ goto errout;
++ }
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_DST_PTR(skb->len, pci_map_single(
++ sc->dma_pdev, skb->data,
++ skb->len, DMA_TO_DEVICE)));
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_SRC_PTR(
++ srclen, pci_map_single(
++ sc->dma_pdev, skb->data,
++ srclen, DMA_TO_DEVICE)));
++ pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen));
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ /* using IOV buffers */
++ uiop = (struct uio *)crp->crp_buf;
++ if (uiop->uio_iovcnt > 1) {
++ printk(DRV_NAME ": iov frags unimplemented\n");
++ err = -EINVAL;
++ goto errout;
++ }
++
++ /* crp_olen is never set; always use crp_ilen */
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_DST_PTR(crp->crp_ilen, pci_map_single(
++ sc->dma_pdev,
++ uiop->uio_iov->iov_base,
++ crp->crp_ilen, DMA_TO_DEVICE)));
++ pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen));
++
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_SRC_PTR(srclen, pci_map_single(
++ sc->dma_pdev,
++ uiop->uio_iov->iov_base,
++ srclen, DMA_TO_DEVICE)));
++ } else {
++ /* using contig buffers */
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_DST_PTR(crp->crp_ilen, pci_map_single(
++ sc->dma_pdev,
++ crp->crp_buf,
++ crp->crp_ilen, DMA_TO_DEVICE)));
++ pasemi_desc_build(
++ &work_desc,
++ XCT_FUN_SRC_PTR(srclen, pci_map_single(
++ sc->dma_pdev,
++ crp->crp_buf, srclen,
++ DMA_TO_DEVICE)));
++ pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen));
++ }
++
++ spin_lock_irqsave(&txring->fill_lock, flags);
++
++ if (txring->sesn != PASEMI_SESSION(crp->crp_sid)) {
++ txring->sesn = PASEMI_SESSION(crp->crp_sid);
++ reinit = 1;
++ }
++
++ if (enccrd) {
++ pasemi_desc_start(&init_desc,
++ XCT_CTRL_HDR(chsel, reinit ? reinit_size : 0x10, DMA_FN_CIV0));
++ pasemi_desc_build(&init_desc,
++ XCT_FUN_SRC_PTR(reinit ? reinit_size : 0x10, ses->dma_addr));
++ }
++
++ if (((txring->next_to_fill + pasemi_desc_size(&init_desc) +
++ pasemi_desc_size(&work_desc)) -
++ txring->next_to_clean) > TX_RING_SIZE) {
++ spin_unlock_irqrestore(&txring->fill_lock, flags);
++ err = ERESTART;
++ goto errout;
++ }
++
++ pasemi_ring_add_desc(txring, &init_desc, NULL);
++ pasemi_ring_add_desc(txring, &work_desc, crp);
++
++ pasemi_ring_incr(sc, chsel,
++ pasemi_desc_size(&init_desc) +
++ pasemi_desc_size(&work_desc));
++
++ spin_unlock_irqrestore(&txring->fill_lock, flags);
++
++ mod_timer(&txring->crypto_timer, jiffies + TIMER_INTERVAL);
++
++ return 0;
++
++erralg:
++ printk(DRV_NAME ": unsupported algorithm or algorithm order alg1 %d alg2 %d\n",
++ crd1->crd_alg, crd2->crd_alg);
++ err = -EINVAL;
++
++errout:
++ if (err != ERESTART) {
++ crp->crp_etype = err;
++ crypto_done(crp);
++ }
++ return err;
++}
++
++static int pasemi_clean_tx(struct pasemi_softc *sc, int chan)
++{
++ int i, j, ring_idx;
++ struct pasemi_fnu_txring *ring = &sc->tx[chan];
++ u16 delta_cnt;
++ int flags, loops = 10;
++ int desc_size;
++ struct cryptop *crp;
++
++ spin_lock_irqsave(&ring->clean_lock, flags);
++
++ while ((delta_cnt = (dma_status->tx_sta[sc->base_chan + chan]
++ & PAS_STATUS_PCNT_M) - ring->total_pktcnt)
++ && loops--) {
++
++ for (i = 0; i < delta_cnt; i++) {
++ desc_size = TX_DESC_INFO(ring, ring->next_to_clean).desc_size;
++ crp = TX_DESC_INFO(ring, ring->next_to_clean).cf_crp;
++ if (crp) {
++ ring_idx = 2 * (ring->next_to_clean & (TX_RING_SIZE-1));
++ if (TX_DESC_INFO(ring, ring->next_to_clean).desc_postop & PASEMI_CHECK_SIG) {
++ /* Need to make sure signature matched,
++ * if not - return error */
++ if (!(ring->desc[ring_idx + 1] & (1ULL << 63)))
++ crp->crp_etype = -EINVAL;
++ }
++ crypto_done(TX_DESC_INFO(ring,
++ ring->next_to_clean).cf_crp);
++ TX_DESC_INFO(ring, ring->next_to_clean).cf_crp = NULL;
++ pci_unmap_single(
++ sc->dma_pdev,
++ XCT_PTR_ADDR_LEN(ring->desc[ring_idx + 1]),
++ PCI_DMA_TODEVICE);
++
++ ring->desc[ring_idx] = ring->desc[ring_idx + 1] = 0;
++
++ ring->next_to_clean++;
++ for (j = 1; j < desc_size; j++) {
++ ring_idx = 2 *
++ (ring->next_to_clean &
++ (TX_RING_SIZE-1));
++ pci_unmap_single(
++ sc->dma_pdev,
++ XCT_PTR_ADDR_LEN(ring->desc[ring_idx]),
++ PCI_DMA_TODEVICE);
++ if (ring->desc[ring_idx + 1])
++ pci_unmap_single(
++ sc->dma_pdev,
++ XCT_PTR_ADDR_LEN(
++ ring->desc[
++ ring_idx + 1]),
++ PCI_DMA_TODEVICE);
++ ring->desc[ring_idx] =
++ ring->desc[ring_idx + 1] = 0;
++ ring->next_to_clean++;
++ }
++ } else {
++ for (j = 0; j < desc_size; j++) {
++ ring_idx = 2 * (ring->next_to_clean & (TX_RING_SIZE-1));
++ ring->desc[ring_idx] =
++ ring->desc[ring_idx + 1] = 0;
++ ring->next_to_clean++;
++ }
++ }
++ }
++
++ ring->total_pktcnt += delta_cnt;
++ }
++ spin_unlock_irqrestore(&ring->clean_lock, flags);
++
++ return 0;
++}
++
++static void sweepup_tx(struct pasemi_softc *sc)
++{
++ int i;
++
++ for (i = 0; i < sc->sc_num_channels; i++)
++ pasemi_clean_tx(sc, i);
++}
++
++static irqreturn_t pasemi_intr(int irq, void *arg, struct pt_regs *regs)
++{
++ struct pasemi_softc *sc = arg;
++ unsigned int reg;
++ int chan = irq - sc->base_irq;
++ int chan_index = sc->base_chan + chan;
++ u64 stat = dma_status->tx_sta[chan_index];
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (!(stat & PAS_STATUS_CAUSE_M))
++ return IRQ_NONE;
++
++ pasemi_clean_tx(sc, chan);
++
++ stat = dma_status->tx_sta[chan_index];
++
++ reg = PAS_IOB_DMA_TXCH_RESET_PINTC |
++ PAS_IOB_DMA_TXCH_RESET_PCNT(sc->tx[chan].total_pktcnt);
++
++ if (stat & PAS_STATUS_SOFT)
++ reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
++
++ out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_RESET(chan_index), reg);
++
++
++ return IRQ_HANDLED;
++}
++
++static int pasemi_dma_setup_tx_resources(struct pasemi_softc *sc, int chan)
++{
++ u32 val;
++ int chan_index = chan + sc->base_chan;
++ int ret;
++ struct pasemi_fnu_txring *ring;
++
++ ring = &sc->tx[chan];
++
++ spin_lock_init(&ring->fill_lock);
++ spin_lock_init(&ring->clean_lock);
++
++ ring->desc_info = kzalloc(sizeof(struct pasemi_desc_info) *
++ TX_RING_SIZE, GFP_KERNEL);
++ if (!ring->desc_info)
++ return -ENOMEM;
++
++ /* Allocate descriptors */
++ ring->desc = dma_alloc_coherent(&sc->dma_pdev->dev,
++ TX_RING_SIZE *
++ 2 * sizeof(u64),
++ &ring->dma, GFP_KERNEL);
++ if (!ring->desc)
++ return -ENOMEM;
++
++ memset((void *) ring->desc, 0, TX_RING_SIZE * 2 * sizeof(u64));
++
++ out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_RESET(chan_index), 0x30);
++
++ ring->total_pktcnt = 0;
++
++ out_le32(sc->dma_regs + PAS_DMA_TXCHAN_BASEL(chan_index),
++ PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
++
++ val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
++ val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
++
++ out_le32(sc->dma_regs + PAS_DMA_TXCHAN_BASEU(chan_index), val);
++
++ out_le32(sc->dma_regs + PAS_DMA_TXCHAN_CFG(chan_index),
++ PAS_DMA_TXCHAN_CFG_TY_FUNC |
++ PAS_DMA_TXCHAN_CFG_TATTR(chan) |
++ PAS_DMA_TXCHAN_CFG_WT(2));
++
++ /* enable tx channel */
++ out_le32(sc->dma_regs +
++ PAS_DMA_TXCHAN_TCMDSTA(chan_index),
++ PAS_DMA_TXCHAN_TCMDSTA_EN);
++
++ out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_CFG(chan_index),
++ PAS_IOB_DMA_TXCH_CFG_CNTTH(1000));
++
++ ring->next_to_fill = 0;
++ ring->next_to_clean = 0;
++
++ snprintf(ring->irq_name, sizeof(ring->irq_name),
++ "%s%d", "crypto", chan);
++
++ ring->irq = irq_create_mapping(NULL, sc->base_irq + chan);
++ ret = request_irq(ring->irq, (irq_handler_t)
++ pasemi_intr, IRQF_DISABLED, ring->irq_name, sc);
++ if (ret) {
++ printk(KERN_ERR DRV_NAME ": failed to hook irq %d ret %d\n",
++ ring->irq, ret);
++ ring->irq = -1;
++ return ret;
++ }
++
++ setup_timer(&ring->crypto_timer, (void *) sweepup_tx, (unsigned long) sc);
++
++ return 0;
++}
++
++static device_method_t pasemi_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, pasemi_newsession),
++ DEVMETHOD(cryptodev_freesession, pasemi_freesession),
++ DEVMETHOD(cryptodev_process, pasemi_process),
++};
++
++/* Set up the crypto device structure, private data,
++ * and anything else we need before we start */
++
++static int __devinit
++pasemi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
++{
++ struct pasemi_softc *sc;
++ int ret, i;
++
++ DPRINTF(KERN_ERR "%s()\n", __FUNCTION__);
++
++ sc = kzalloc(sizeof(*sc), GFP_KERNEL);
++ if (!sc)
++ return -ENOMEM;
++
++ softc_device_init(sc, DRV_NAME, 1, pasemi_methods);
++
++ pci_set_drvdata(pdev, sc);
++
++ spin_lock_init(&sc->sc_chnlock);
++
++ sc->sc_sessions = (struct pasemi_session **)
++ kzalloc(PASEMI_INITIAL_SESSIONS *
++ sizeof(struct pasemi_session *), GFP_ATOMIC);
++ if (sc->sc_sessions == NULL) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ sc->sc_nsessions = PASEMI_INITIAL_SESSIONS;
++ sc->sc_lastchn = 0;
++ sc->base_irq = pdev->irq + 6;
++ sc->base_chan = 6;
++ sc->sc_cid = -1;
++ sc->dma_pdev = pdev;
++
++ sc->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
++ if (!sc->iob_pdev) {
++ dev_err(&pdev->dev, "Can't find I/O Bridge\n");
++ ret = -ENODEV;
++ goto out;
++ }
++
++ /* This is hardcoded and ugly, but we have some firmware versions
++ * who don't provide the register space in the device tree. Luckily
++ * they are at well-known locations so we can just do the math here.
++ */
++ sc->dma_regs =
++ ioremap(0xe0000000 + (sc->dma_pdev->devfn << 12), 0x2000);
++ sc->iob_regs =
++ ioremap(0xe0000000 + (sc->iob_pdev->devfn << 12), 0x2000);
++ if (!sc->dma_regs || !sc->iob_regs) {
++ dev_err(&pdev->dev, "Can't map registers\n");
++ ret = -ENODEV;
++ goto out;
++ }
++
++ dma_status = __ioremap(0xfd800000, 0x1000, 0);
++ if (!dma_status) {
++ ret = -ENODEV;
++ dev_err(&pdev->dev, "Can't map dmastatus space\n");
++ goto out;
++ }
++
++ sc->tx = (struct pasemi_fnu_txring *)
++ kzalloc(sizeof(struct pasemi_fnu_txring)
++ * 8, GFP_KERNEL);
++ if (!sc->tx) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ /* Initialize the h/w */
++ out_le32(sc->dma_regs + PAS_DMA_COM_CFG,
++ (in_le32(sc->dma_regs + PAS_DMA_COM_CFG) |
++ PAS_DMA_COM_CFG_FWF));
++ out_le32(sc->dma_regs + PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
++
++ for (i = 0; i < PASEMI_FNU_CHANNELS; i++) {
++ sc->sc_num_channels++;
++ ret = pasemi_dma_setup_tx_resources(sc, i);
++ if (ret)
++ goto out;
++ }
++
++ sc->sc_cid = crypto_get_driverid(softc_get_device(sc),
++ CRYPTOCAP_F_HARDWARE);
++ if (sc->sc_cid < 0) {
++ printk(KERN_ERR DRV_NAME ": could not get crypto driver id\n");
++ ret = -ENXIO;
++ goto out;
++ }
++
++ /* register algorithms with the framework */
++ printk(DRV_NAME ":");
++
++ crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_ARC4, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
++
++ return 0;
++
++out:
++ pasemi_dma_remove(pdev);
++ return ret;
++}
++
++#define MAX_RETRIES 5000
++
++static void pasemi_free_tx_resources(struct pasemi_softc *sc, int chan)
++{
++ struct pasemi_fnu_txring *ring = &sc->tx[chan];
++ int chan_index = chan + sc->base_chan;
++ int retries;
++ u32 stat;
++
++ /* Stop the channel */
++ out_le32(sc->dma_regs +
++ PAS_DMA_TXCHAN_TCMDSTA(chan_index),
++ PAS_DMA_TXCHAN_TCMDSTA_ST);
++
++ for (retries = 0; retries < MAX_RETRIES; retries++) {
++ stat = in_le32(sc->dma_regs +
++ PAS_DMA_TXCHAN_TCMDSTA(chan_index));
++ if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
++ break;
++ cond_resched();
++ }
++
++ if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
++ dev_err(&sc->dma_pdev->dev, "Failed to stop tx channel %d\n",
++ chan_index);
++
++ /* Disable the channel */
++ out_le32(sc->dma_regs +
++ PAS_DMA_TXCHAN_TCMDSTA(chan_index),
++ 0);
++
++ if (ring->desc_info)
++ kfree((void *) ring->desc_info);
++ if (ring->desc)
++ dma_free_coherent(&sc->dma_pdev->dev,
++ TX_RING_SIZE *
++ 2 * sizeof(u64),
++ (void *) ring->desc, ring->dma);
++ if (ring->irq != -1)
++ free_irq(ring->irq, sc);
++
++ del_timer(&ring->crypto_timer);
++}
++
++static void __devexit pasemi_dma_remove(struct pci_dev *pdev)
++{
++ struct pasemi_softc *sc = pci_get_drvdata(pdev);
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (sc->sc_cid >= 0) {
++ crypto_unregister_all(sc->sc_cid);
++ }
++
++ if (sc->tx) {
++ for (i = 0; i < sc->sc_num_channels; i++)
++ pasemi_free_tx_resources(sc, i);
++
++ kfree(sc->tx);
++ }
++ if (sc->sc_sessions) {
++ for (i = 0; i < sc->sc_nsessions; i++)
++ kfree(sc->sc_sessions[i]);
++ kfree(sc->sc_sessions);
++ }
++ if (sc->iob_pdev)
++ pci_dev_put(sc->iob_pdev);
++ if (sc->dma_regs)
++ iounmap(sc->dma_regs);
++ if (sc->iob_regs)
++ iounmap(sc->iob_regs);
++ kfree(sc);
++}
++
++static struct pci_device_id pasemi_dma_pci_tbl[] = {
++ { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa007) },
++};
++
++MODULE_DEVICE_TABLE(pci, pasemi_dma_pci_tbl);
++
++static struct pci_driver pasemi_dma_driver = {
++ .name = "pasemi_dma",
++ .id_table = pasemi_dma_pci_tbl,
++ .probe = pasemi_dma_probe,
++ .remove = __devexit_p(pasemi_dma_remove),
++};
++
++static void __exit pasemi_dma_cleanup_module(void)
++{
++ pci_unregister_driver(&pasemi_dma_driver);
++ __iounmap(dma_status);
++ dma_status = NULL;
++}
++
++int pasemi_dma_init_module(void)
++{
++ return pci_register_driver(&pasemi_dma_driver);
++}
++
++module_init(pasemi_dma_init_module);
++module_exit(pasemi_dma_cleanup_module);
++
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("Egor Martovetsky egor@pasemi.com");
++MODULE_DESCRIPTION("OCF driver for PA Semi PWRficient DMA Crypto Engine");
+diff -Nur linux-2.6.30.orig/crypto/ocf/pasemi/pasemi_fnu.h linux-2.6.30/crypto/ocf/pasemi/pasemi_fnu.h
+--- linux-2.6.30.orig/crypto/ocf/pasemi/pasemi_fnu.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/pasemi/pasemi_fnu.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,410 @@
++/*
++ * Copyright (C) 2007 PA Semi, Inc
++ *
++ * Driver for the PA Semi PWRficient DMA Crypto Engine, soft state and
++ * hardware register layouts.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ */
++
++#ifndef PASEMI_FNU_H
++#define PASEMI_FNU_H
++
++#include <linux/spinlock.h>
++
++#define PASEMI_SESSION(sid) ((sid) & 0xffffffff)
++#define PASEMI_SID(sesn) ((sesn) & 0xffffffff)
++#define DPRINTF(a...) if (debug) { printk(DRV_NAME ": " a); }
++
++/* Must be a power of two */
++#define RX_RING_SIZE 512
++#define TX_RING_SIZE 512
++#define TX_DESC(ring, num) ((ring)->desc[2 * (num & (TX_RING_SIZE-1))])
++#define TX_DESC_INFO(ring, num) ((ring)->desc_info[(num) & (TX_RING_SIZE-1)])
++#define MAX_DESC_SIZE 8
++#define PASEMI_INITIAL_SESSIONS 10
++#define PASEMI_FNU_CHANNELS 8
++
++/* DMA descriptor */
++struct pasemi_desc {
++ u64 quad[2*MAX_DESC_SIZE];
++ int quad_cnt;
++ int size;
++ int postop;
++};
++
++/*
++ * Holds per descriptor data
++ */
++struct pasemi_desc_info {
++ int desc_size;
++ int desc_postop;
++#define PASEMI_CHECK_SIG 0x1
++
++ struct cryptop *cf_crp;
++};
++
++/*
++ * Holds per channel data
++ */
++struct pasemi_fnu_txring {
++ volatile u64 *desc;
++ volatile struct
++ pasemi_desc_info *desc_info;
++ dma_addr_t dma;
++ struct timer_list crypto_timer;
++ spinlock_t fill_lock;
++ spinlock_t clean_lock;
++ unsigned int next_to_fill;
++ unsigned int next_to_clean;
++ u16 total_pktcnt;
++ int irq;
++ int sesn;
++ char irq_name[10];
++};
++
++/*
++ * Holds data specific to a single pasemi device.
++ */
++struct pasemi_softc {
++ softc_device_decl sc_cdev;
++ struct pci_dev *dma_pdev; /* device backpointer */
++ struct pci_dev *iob_pdev; /* device backpointer */
++ void __iomem *dma_regs;
++ void __iomem *iob_regs;
++ int base_irq;
++ int base_chan;
++ int32_t sc_cid; /* crypto tag */
++ int sc_nsessions;
++ struct pasemi_session **sc_sessions;
++ int sc_num_channels;/* number of crypto channels */
++
++ /* pointer to the array of txring datastructures, one txring per channel */
++ struct pasemi_fnu_txring *tx;
++
++ /*
++ * mutual exclusion for the channel scheduler
++ */
++ spinlock_t sc_chnlock;
++ /* last channel used, for now use round-robin to allocate channels */
++ int sc_lastchn;
++};
++
++struct pasemi_session {
++ u64 civ[2];
++ u64 keysz;
++ u64 key[4];
++ u64 ccmd;
++ u64 hkey[4];
++ u64 hseq;
++ u64 giv[2];
++ u64 hiv[4];
++
++ int used;
++ dma_addr_t dma_addr;
++ int chan;
++};
++
++/* status register layout in IOB region, at 0xfd800000 */
++struct pasdma_status {
++ u64 rx_sta[64];
++ u64 tx_sta[20];
++};
++
++#define ALG_IS_CIPHER(alg) ((alg == CRYPTO_DES_CBC) || \
++ (alg == CRYPTO_3DES_CBC) || \
++ (alg == CRYPTO_AES_CBC) || \
++ (alg == CRYPTO_ARC4) || \
++ (alg == CRYPTO_NULL_CBC))
++
++#define ALG_IS_SIG(alg) ((alg == CRYPTO_MD5) || \
++ (alg == CRYPTO_MD5_HMAC) || \
++ (alg == CRYPTO_SHA1) || \
++ (alg == CRYPTO_SHA1_HMAC) || \
++ (alg == CRYPTO_NULL_HMAC))
++
++enum {
++ PAS_DMA_COM_TXCMD = 0x100, /* Transmit Command Register */
++ PAS_DMA_COM_TXSTA = 0x104, /* Transmit Status Register */
++ PAS_DMA_COM_RXCMD = 0x108, /* Receive Command Register */
++ PAS_DMA_COM_RXSTA = 0x10c, /* Receive Status Register */
++ PAS_DMA_COM_CFG = 0x114, /* DMA Configuration Register */
++};
++
++/* All these registers live in the PCI configuration space for the DMA PCI
++ * device. Use the normal PCI config access functions for them.
++ */
++
++#define PAS_DMA_COM_CFG_FWF 0x18000000
++
++#define PAS_DMA_COM_TXCMD_EN 0x00000001 /* enable */
++#define PAS_DMA_COM_TXSTA_ACT 0x00000001 /* active */
++#define PAS_DMA_COM_RXCMD_EN 0x00000001 /* enable */
++#define PAS_DMA_COM_RXSTA_ACT 0x00000001 /* active */
++
++#define _PAS_DMA_TXCHAN_STRIDE 0x20 /* Size per channel */
++#define _PAS_DMA_TXCHAN_TCMDSTA 0x300 /* Command / Status */
++#define _PAS_DMA_TXCHAN_CFG 0x304 /* Configuration */
++#define _PAS_DMA_TXCHAN_DSCRBU 0x308 /* Descriptor BU Allocation */
++#define _PAS_DMA_TXCHAN_INCR 0x310 /* Descriptor increment */
++#define _PAS_DMA_TXCHAN_CNT 0x314 /* Descriptor count/offset */
++#define _PAS_DMA_TXCHAN_BASEL 0x318 /* Descriptor ring base (low) */
++#define _PAS_DMA_TXCHAN_BASEU 0x31c /* (high) */
++#define PAS_DMA_TXCHAN_TCMDSTA(c) (0x300+(c)*_PAS_DMA_TXCHAN_STRIDE)
++#define PAS_DMA_TXCHAN_TCMDSTA_EN 0x00000001 /* Enabled */
++#define PAS_DMA_TXCHAN_TCMDSTA_ST 0x00000002 /* Stop interface */
++#define PAS_DMA_TXCHAN_TCMDSTA_ACT 0x00010000 /* Active */
++#define PAS_DMA_TXCHAN_CFG(c) (0x304+(c)*_PAS_DMA_TXCHAN_STRIDE)
++#define PAS_DMA_TXCHAN_CFG_TY_FUNC 0x00000002 /* Type = interface */
++#define PAS_DMA_TXCHAN_CFG_TY_IFACE 0x00000000 /* Type = interface */
++#define PAS_DMA_TXCHAN_CFG_TATTR_M 0x0000003c
++#define PAS_DMA_TXCHAN_CFG_TATTR_S 2
++#define PAS_DMA_TXCHAN_CFG_TATTR(x) (((x) << PAS_DMA_TXCHAN_CFG_TATTR_S) & \
++ PAS_DMA_TXCHAN_CFG_TATTR_M)
++#define PAS_DMA_TXCHAN_CFG_WT_M 0x000001c0
++#define PAS_DMA_TXCHAN_CFG_WT_S 6
++#define PAS_DMA_TXCHAN_CFG_WT(x) (((x) << PAS_DMA_TXCHAN_CFG_WT_S) & \
++ PAS_DMA_TXCHAN_CFG_WT_M)
++#define PAS_DMA_TXCHAN_CFG_LPSQ_FAST 0x00000400
++#define PAS_DMA_TXCHAN_CFG_LPDQ_FAST 0x00000800
++#define PAS_DMA_TXCHAN_CFG_CF 0x00001000 /* Clean first line */
++#define PAS_DMA_TXCHAN_CFG_CL 0x00002000 /* Clean last line */
++#define PAS_DMA_TXCHAN_CFG_UP 0x00004000 /* update tx descr when sent */
++#define PAS_DMA_TXCHAN_INCR(c) (0x310+(c)*_PAS_DMA_TXCHAN_STRIDE)
++#define PAS_DMA_TXCHAN_BASEL(c) (0x318+(c)*_PAS_DMA_TXCHAN_STRIDE)
++#define PAS_DMA_TXCHAN_BASEL_BRBL_M 0xffffffc0
++#define PAS_DMA_TXCHAN_BASEL_BRBL_S 0
++#define PAS_DMA_TXCHAN_BASEL_BRBL(x) (((x) << PAS_DMA_TXCHAN_BASEL_BRBL_S) & \
++ PAS_DMA_TXCHAN_BASEL_BRBL_M)
++#define PAS_DMA_TXCHAN_BASEU(c) (0x31c+(c)*_PAS_DMA_TXCHAN_STRIDE)
++#define PAS_DMA_TXCHAN_BASEU_BRBH_M 0x00000fff
++#define PAS_DMA_TXCHAN_BASEU_BRBH_S 0
++#define PAS_DMA_TXCHAN_BASEU_BRBH(x) (((x) << PAS_DMA_TXCHAN_BASEU_BRBH_S) & \
++ PAS_DMA_TXCHAN_BASEU_BRBH_M)
++/* # of cache lines worth of buffer ring */
++#define PAS_DMA_TXCHAN_BASEU_SIZ_M 0x3fff0000
++#define PAS_DMA_TXCHAN_BASEU_SIZ_S 16 /* 0 = 16K */
++#define PAS_DMA_TXCHAN_BASEU_SIZ(x) (((x) << PAS_DMA_TXCHAN_BASEU_SIZ_S) & \
++ PAS_DMA_TXCHAN_BASEU_SIZ_M)
++
++#define PAS_STATUS_PCNT_M 0x000000000000ffffull
++#define PAS_STATUS_PCNT_S 0
++#define PAS_STATUS_DCNT_M 0x00000000ffff0000ull
++#define PAS_STATUS_DCNT_S 16
++#define PAS_STATUS_BPCNT_M 0x0000ffff00000000ull
++#define PAS_STATUS_BPCNT_S 32
++#define PAS_STATUS_CAUSE_M 0xf000000000000000ull
++#define PAS_STATUS_TIMER 0x1000000000000000ull
++#define PAS_STATUS_ERROR 0x2000000000000000ull
++#define PAS_STATUS_SOFT 0x4000000000000000ull
++#define PAS_STATUS_INT 0x8000000000000000ull
++
++#define PAS_IOB_DMA_RXCH_CFG(i) (0x1100 + (i)*4)
++#define PAS_IOB_DMA_RXCH_CFG_CNTTH_M 0x00000fff
++#define PAS_IOB_DMA_RXCH_CFG_CNTTH_S 0
++#define PAS_IOB_DMA_RXCH_CFG_CNTTH(x) (((x) << PAS_IOB_DMA_RXCH_CFG_CNTTH_S) & \
++ PAS_IOB_DMA_RXCH_CFG_CNTTH_M)
++#define PAS_IOB_DMA_TXCH_CFG(i) (0x1200 + (i)*4)
++#define PAS_IOB_DMA_TXCH_CFG_CNTTH_M 0x00000fff
++#define PAS_IOB_DMA_TXCH_CFG_CNTTH_S 0
++#define PAS_IOB_DMA_TXCH_CFG_CNTTH(x) (((x) << PAS_IOB_DMA_TXCH_CFG_CNTTH_S) & \
++ PAS_IOB_DMA_TXCH_CFG_CNTTH_M)
++#define PAS_IOB_DMA_RXCH_STAT(i) (0x1300 + (i)*4)
++#define PAS_IOB_DMA_RXCH_STAT_INTGEN 0x00001000
++#define PAS_IOB_DMA_RXCH_STAT_CNTDEL_M 0x00000fff
++#define PAS_IOB_DMA_RXCH_STAT_CNTDEL_S 0
++#define PAS_IOB_DMA_RXCH_STAT_CNTDEL(x) (((x) << PAS_IOB_DMA_RXCH_STAT_CNTDEL_S) &\
++ PAS_IOB_DMA_RXCH_STAT_CNTDEL_M)
++#define PAS_IOB_DMA_TXCH_STAT(i) (0x1400 + (i)*4)
++#define PAS_IOB_DMA_TXCH_STAT_INTGEN 0x00001000
++#define PAS_IOB_DMA_TXCH_STAT_CNTDEL_M 0x00000fff
++#define PAS_IOB_DMA_TXCH_STAT_CNTDEL_S 0
++#define PAS_IOB_DMA_TXCH_STAT_CNTDEL(x) (((x) << PAS_IOB_DMA_TXCH_STAT_CNTDEL_S) &\
++ PAS_IOB_DMA_TXCH_STAT_CNTDEL_M)
++#define PAS_IOB_DMA_RXCH_RESET(i) (0x1500 + (i)*4)
++#define PAS_IOB_DMA_RXCH_RESET_PCNT_M 0xffff0000
++#define PAS_IOB_DMA_RXCH_RESET_PCNT_S 16
++#define PAS_IOB_DMA_RXCH_RESET_PCNT(x) (((x) << PAS_IOB_DMA_RXCH_RESET_PCNT_S) & \
++ PAS_IOB_DMA_RXCH_RESET_PCNT_M)
++#define PAS_IOB_DMA_RXCH_RESET_PCNTRST 0x00000020
++#define PAS_IOB_DMA_RXCH_RESET_DCNTRST 0x00000010
++#define PAS_IOB_DMA_RXCH_RESET_TINTC 0x00000008
++#define PAS_IOB_DMA_RXCH_RESET_DINTC 0x00000004
++#define PAS_IOB_DMA_RXCH_RESET_SINTC 0x00000002
++#define PAS_IOB_DMA_RXCH_RESET_PINTC 0x00000001
++#define PAS_IOB_DMA_TXCH_RESET(i) (0x1600 + (i)*4)
++#define PAS_IOB_DMA_TXCH_RESET_PCNT_M 0xffff0000
++#define PAS_IOB_DMA_TXCH_RESET_PCNT_S 16
++#define PAS_IOB_DMA_TXCH_RESET_PCNT(x) (((x) << PAS_IOB_DMA_TXCH_RESET_PCNT_S) & \
++ PAS_IOB_DMA_TXCH_RESET_PCNT_M)
++#define PAS_IOB_DMA_TXCH_RESET_PCNTRST 0x00000020
++#define PAS_IOB_DMA_TXCH_RESET_DCNTRST 0x00000010
++#define PAS_IOB_DMA_TXCH_RESET_TINTC 0x00000008
++#define PAS_IOB_DMA_TXCH_RESET_DINTC 0x00000004
++#define PAS_IOB_DMA_TXCH_RESET_SINTC 0x00000002
++#define PAS_IOB_DMA_TXCH_RESET_PINTC 0x00000001
++
++#define PAS_IOB_DMA_COM_TIMEOUTCFG 0x1700
++#define PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT_M 0x00ffffff
++#define PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT_S 0
++#define PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(x) (((x) << PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT_S) & \
++ PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT_M)
++
++/* Transmit descriptor fields */
++#define XCT_MACTX_T 0x8000000000000000ull
++#define XCT_MACTX_ST 0x4000000000000000ull
++#define XCT_MACTX_NORES 0x0000000000000000ull
++#define XCT_MACTX_8BRES 0x1000000000000000ull
++#define XCT_MACTX_24BRES 0x2000000000000000ull
++#define XCT_MACTX_40BRES 0x3000000000000000ull
++#define XCT_MACTX_I 0x0800000000000000ull
++#define XCT_MACTX_O 0x0400000000000000ull
++#define XCT_MACTX_E 0x0200000000000000ull
++#define XCT_MACTX_VLAN_M 0x0180000000000000ull
++#define XCT_MACTX_VLAN_NOP 0x0000000000000000ull
++#define XCT_MACTX_VLAN_REMOVE 0x0080000000000000ull
++#define XCT_MACTX_VLAN_INSERT 0x0100000000000000ull
++#define XCT_MACTX_VLAN_REPLACE 0x0180000000000000ull
++#define XCT_MACTX_CRC_M 0x0060000000000000ull
++#define XCT_MACTX_CRC_NOP 0x0000000000000000ull
++#define XCT_MACTX_CRC_INSERT 0x0020000000000000ull
++#define XCT_MACTX_CRC_PAD 0x0040000000000000ull
++#define XCT_MACTX_CRC_REPLACE 0x0060000000000000ull
++#define XCT_MACTX_SS 0x0010000000000000ull
++#define XCT_MACTX_LLEN_M 0x00007fff00000000ull
++#define XCT_MACTX_LLEN_S 32ull
++#define XCT_MACTX_LLEN(x) ((((long)(x)) << XCT_MACTX_LLEN_S) & \
++ XCT_MACTX_LLEN_M)
++#define XCT_MACTX_IPH_M 0x00000000f8000000ull
++#define XCT_MACTX_IPH_S 27ull
++#define XCT_MACTX_IPH(x) ((((long)(x)) << XCT_MACTX_IPH_S) & \
++ XCT_MACTX_IPH_M)
++#define XCT_MACTX_IPO_M 0x0000000007c00000ull
++#define XCT_MACTX_IPO_S 22ull
++#define XCT_MACTX_IPO(x) ((((long)(x)) << XCT_MACTX_IPO_S) & \
++ XCT_MACTX_IPO_M)
++#define XCT_MACTX_CSUM_M 0x0000000000000060ull
++#define XCT_MACTX_CSUM_NOP 0x0000000000000000ull
++#define XCT_MACTX_CSUM_TCP 0x0000000000000040ull
++#define XCT_MACTX_CSUM_UDP 0x0000000000000060ull
++#define XCT_MACTX_V6 0x0000000000000010ull
++#define XCT_MACTX_C 0x0000000000000004ull
++#define XCT_MACTX_AL2 0x0000000000000002ull
++
++#define XCT_PTR_T 0x8000000000000000ull
++#define XCT_PTR_LEN_M 0x7ffff00000000000ull
++#define XCT_PTR_LEN_S 44
++#define XCT_PTR_LEN(x) ((((long)(x)) << XCT_PTR_LEN_S) & \
++ XCT_PTR_LEN_M)
++#define XCT_PTR_ADDR_M 0x00000fffffffffffull
++#define XCT_PTR_ADDR_S 0
++#define XCT_PTR_ADDR(x) ((((long)(x)) << XCT_PTR_ADDR_S) & \
++ XCT_PTR_ADDR_M)
++
++/* Function descriptor fields */
++#define XCT_FUN_T 0x8000000000000000ull
++#define XCT_FUN_ST 0x4000000000000000ull
++#define XCT_FUN_NORES 0x0000000000000000ull
++#define XCT_FUN_8BRES 0x1000000000000000ull
++#define XCT_FUN_24BRES 0x2000000000000000ull
++#define XCT_FUN_40BRES 0x3000000000000000ull
++#define XCT_FUN_I 0x0800000000000000ull
++#define XCT_FUN_O 0x0400000000000000ull
++#define XCT_FUN_E 0x0200000000000000ull
++#define XCT_FUN_FUN_S 54
++#define XCT_FUN_FUN_M 0x01c0000000000000ull
++#define XCT_FUN_FUN(num) ((((long)(num)) << XCT_FUN_FUN_S) & \
++ XCT_FUN_FUN_M)
++#define XCT_FUN_CRM_NOP 0x0000000000000000ull
++#define XCT_FUN_CRM_SIG 0x0008000000000000ull
++#define XCT_FUN_CRM_ENC 0x0010000000000000ull
++#define XCT_FUN_CRM_DEC 0x0018000000000000ull
++#define XCT_FUN_CRM_SIG_ENC 0x0020000000000000ull
++#define XCT_FUN_CRM_ENC_SIG 0x0028000000000000ull
++#define XCT_FUN_CRM_SIG_DEC 0x0030000000000000ull
++#define XCT_FUN_CRM_DEC_SIG 0x0038000000000000ull
++#define XCT_FUN_LLEN_M 0x0007ffff00000000ull
++#define XCT_FUN_LLEN_S 32ULL
++#define XCT_FUN_LLEN(x) ((((long)(x)) << XCT_FUN_LLEN_S) & \
++ XCT_FUN_LLEN_M)
++#define XCT_FUN_SHL_M 0x00000000f8000000ull
++#define XCT_FUN_SHL_S 27ull
++#define XCT_FUN_SHL(x) ((((long)(x)) << XCT_FUN_SHL_S) & \
++ XCT_FUN_SHL_M)
++#define XCT_FUN_CHL_M 0x0000000007c00000ull
++#define XCT_FUN_CHL_S 22ull
++#define XCT_FUN_CHL(x) ((((long)(x)) << XCT_FUN_CHL_S) & \
++ XCT_FUN_CHL_M)
++#define XCT_FUN_HSZ_M 0x00000000003c0000ull
++#define XCT_FUN_HSZ_S 18ull
++#define XCT_FUN_HSZ(x) ((((long)(x)) << XCT_FUN_HSZ_S) & \
++ XCT_FUN_HSZ_M)
++#define XCT_FUN_ALG_DES 0x0000000000000000ull
++#define XCT_FUN_ALG_3DES 0x0000000000008000ull
++#define XCT_FUN_ALG_AES 0x0000000000010000ull
++#define XCT_FUN_ALG_ARC 0x0000000000018000ull
++#define XCT_FUN_ALG_KASUMI 0x0000000000020000ull
++#define XCT_FUN_BCM_ECB 0x0000000000000000ull
++#define XCT_FUN_BCM_CBC 0x0000000000001000ull
++#define XCT_FUN_BCM_CFB 0x0000000000002000ull
++#define XCT_FUN_BCM_OFB 0x0000000000003000ull
++#define XCT_FUN_BCM_CNT 0x0000000000003800ull
++#define XCT_FUN_BCM_KAS_F8 0x0000000000002800ull
++#define XCT_FUN_BCM_KAS_F9 0x0000000000001800ull
++#define XCT_FUN_BCP_NO_PAD 0x0000000000000000ull
++#define XCT_FUN_BCP_ZRO 0x0000000000000200ull
++#define XCT_FUN_BCP_PL 0x0000000000000400ull
++#define XCT_FUN_BCP_INCR 0x0000000000000600ull
++#define XCT_FUN_SIG_MD5 (0ull << 4)
++#define XCT_FUN_SIG_SHA1 (2ull << 4)
++#define XCT_FUN_SIG_HMAC_MD5 (8ull << 4)
++#define XCT_FUN_SIG_HMAC_SHA1 (10ull << 4)
++#define XCT_FUN_A 0x0000000000000008ull
++#define XCT_FUN_C 0x0000000000000004ull
++#define XCT_FUN_AL2 0x0000000000000002ull
++#define XCT_FUN_SE 0x0000000000000001ull
++
++#define XCT_FUN_SRC_PTR(len, addr) (XCT_PTR_LEN(len) | XCT_PTR_ADDR(addr))
++#define XCT_FUN_DST_PTR(len, addr) (XCT_FUN_SRC_PTR(len, addr) | \
++ 0x8000000000000000ull)
++
++#define XCT_CTRL_HDR_FUN_NUM_M 0x01c0000000000000ull
++#define XCT_CTRL_HDR_FUN_NUM_S 54
++#define XCT_CTRL_HDR_LEN_M 0x0007ffff00000000ull
++#define XCT_CTRL_HDR_LEN_S 32
++#define XCT_CTRL_HDR_REG_M 0x00000000000000ffull
++#define XCT_CTRL_HDR_REG_S 0
++
++#define XCT_CTRL_HDR(funcN,len,reg) (0x9400000000000000ull | \
++ ((((long)(funcN)) << XCT_CTRL_HDR_FUN_NUM_S) \
++ & XCT_CTRL_HDR_FUN_NUM_M) | \
++ ((((long)(len)) << \
++ XCT_CTRL_HDR_LEN_S) & XCT_CTRL_HDR_LEN_M) | \
++ ((((long)(reg)) << \
++ XCT_CTRL_HDR_REG_S) & XCT_CTRL_HDR_REG_M))
++
++/* Function config command options */
++#define DMA_CALGO_DES 0x00
++#define DMA_CALGO_3DES 0x01
++#define DMA_CALGO_AES 0x02
++#define DMA_CALGO_ARC 0x03
++
++#define DMA_FN_CIV0 0x02
++#define DMA_FN_CIV1 0x03
++#define DMA_FN_HKEY0 0x0a
++
++#define XCT_PTR_ADDR_LEN(ptr) ((ptr) & XCT_PTR_ADDR_M), \
++ (((ptr) & XCT_PTR_LEN_M) >> XCT_PTR_LEN_S)
++
++#endif /* PASEMI_FNU_H */
+diff -Nur linux-2.6.30.orig/crypto/ocf/random.c linux-2.6.30/crypto/ocf/random.c
+--- linux-2.6.30.orig/crypto/ocf/random.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/random.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,317 @@
++/*
++ * A system independant way of adding entropy to the kernels pool
++ * this way the drivers can focus on the real work and we can take
++ * care of pushing it to the appropriate place in the kernel.
++ *
++ * This should be fast and callable from timers/interrupts
++ *
++ * Written by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/spinlock.h>
++#include <linux/version.h>
++#include <linux/unistd.h>
++#include <linux/poll.h>
++#include <linux/random.h>
++#include <cryptodev.h>
++
++#ifdef CONFIG_OCF_FIPS
++#include "rndtest.h"
++#endif
++
++#ifndef HAS_RANDOM_INPUT_WAIT
++#error "Please do not enable OCF_RANDOMHARVEST unless you have applied patches"
++#endif
++
++/*
++ * a hack to access the debug levels from the crypto driver
++ */
++extern int crypto_debug;
++#define debug crypto_debug
++
++/*
++ * a list of all registered random providers
++ */
++static LIST_HEAD(random_ops);
++static int started = 0;
++static int initted = 0;
++
++struct random_op {
++ struct list_head random_list;
++ u_int32_t driverid;
++ int (*read_random)(void *arg, u_int32_t *buf, int len);
++ void *arg;
++};
++
++static int random_proc(void *arg);
++
++static pid_t randomproc = (pid_t) -1;
++static spinlock_t random_lock;
++
++/*
++ * just init the spin locks
++ */
++static int
++crypto_random_init(void)
++{
++ spin_lock_init(&random_lock);
++ initted = 1;
++ return(0);
++}
++
++/*
++ * Add the given random reader to our list (if not present)
++ * and start the thread (if not already started)
++ *
++ * we have to assume that driver id is ok for now
++ */
++int
++crypto_rregister(
++ u_int32_t driverid,
++ int (*read_random)(void *arg, u_int32_t *buf, int len),
++ void *arg)
++{
++ unsigned long flags;
++ int ret = 0;
++ struct random_op *rops, *tmp;
++
++ dprintk("%s,%d: %s(0x%x, %p, %p)\n", __FILE__, __LINE__,
++ __FUNCTION__, driverid, read_random, arg);
++
++ if (!initted)
++ crypto_random_init();
++
++#if 0
++ struct cryptocap *cap;
++
++ cap = crypto_checkdriver(driverid);
++ if (!cap)
++ return EINVAL;
++#endif
++
++ list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
++ if (rops->driverid == driverid && rops->read_random == read_random)
++ return EEXIST;
++ }
++
++ rops = (struct random_op *) kmalloc(sizeof(*rops), GFP_KERNEL);
++ if (!rops)
++ return ENOMEM;
++
++ rops->driverid = driverid;
++ rops->read_random = read_random;
++ rops->arg = arg;
++
++ spin_lock_irqsave(&random_lock, flags);
++ list_add_tail(&rops->random_list, &random_ops);
++ if (!started) {
++ randomproc = kernel_thread(random_proc, NULL, CLONE_FS|CLONE_FILES);
++ if (randomproc < 0) {
++ ret = randomproc;
++ printk("crypto: crypto_rregister cannot start random thread; "
++ "error %d", ret);
++ } else
++ started = 1;
++ }
++ spin_unlock_irqrestore(&random_lock, flags);
++
++ return ret;
++}
++EXPORT_SYMBOL(crypto_rregister);
++
++int
++crypto_runregister_all(u_int32_t driverid)
++{
++ struct random_op *rops, *tmp;
++ unsigned long flags;
++
++ dprintk("%s,%d: %s(0x%x)\n", __FILE__, __LINE__, __FUNCTION__, driverid);
++
++ list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
++ if (rops->driverid == driverid) {
++ list_del(&rops->random_list);
++ kfree(rops);
++ }
++ }
++
++ spin_lock_irqsave(&random_lock, flags);
++ if (list_empty(&random_ops) && started)
++ kill_pid(randomproc, SIGKILL, 1);
++ spin_unlock_irqrestore(&random_lock, flags);
++ return(0);
++}
++EXPORT_SYMBOL(crypto_runregister_all);
++
++/*
++ * while we can add entropy to random.c continue to read random data from
++ * the drivers and push it to random.
++ */
++static int
++random_proc(void *arg)
++{
++ int n;
++ int wantcnt;
++ int bufcnt = 0;
++ int retval = 0;
++ int *buf = NULL;
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ daemonize();
++ spin_lock_irq(&current->sigmask_lock);
++ sigemptyset(&current->blocked);
++ recalc_sigpending(current);
++ spin_unlock_irq(&current->sigmask_lock);
++ sprintf(current->comm, "ocf-random");
++#else
++ daemonize("ocf-random");
++ allow_signal(SIGKILL);
++#endif
++
++ (void) get_fs();
++ set_fs(get_ds());
++
++#ifdef CONFIG_OCF_FIPS
++#define NUM_INT (RNDTEST_NBYTES/sizeof(int))
++#else
++#define NUM_INT 32
++#endif
++
++ /*
++ * some devices can transferr their RNG data direct into memory,
++ * so make sure it is device friendly
++ */
++ buf = kmalloc(NUM_INT * sizeof(int), GFP_DMA);
++ if (NULL == buf) {
++ printk("crypto: RNG could not allocate memory\n");
++ retval = -ENOMEM;
++ goto bad_alloc;
++ }
++
++ wantcnt = NUM_INT; /* start by adding some entropy */
++
++ /*
++ * its possible due to errors or driver removal that we no longer
++ * have anything to do, if so exit or we will consume all the CPU
++ * doing nothing
++ */
++ while (!list_empty(&random_ops)) {
++ struct random_op *rops, *tmp;
++
++#ifdef CONFIG_OCF_FIPS
++ if (wantcnt)
++ wantcnt = NUM_INT; /* FIPs mode can do 20000 bits or none */
++#endif
++
++ /* see if we can get enough entropy to make the world
++ * a better place.
++ */
++ while (bufcnt < wantcnt && bufcnt < NUM_INT) {
++ list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
++
++ n = (*rops->read_random)(rops->arg, &buf[bufcnt],
++ NUM_INT - bufcnt);
++
++ /* on failure remove the random number generator */
++ if (n == -1) {
++ list_del(&rops->random_list);
++ printk("crypto: RNG (driverid=0x%x) failed, disabling\n",
++ rops->driverid);
++ kfree(rops);
++ } else if (n > 0)
++ bufcnt += n;
++ }
++ /* give up CPU for a bit, just in case as this is a loop */
++ schedule();
++ }
++
++
++#ifdef CONFIG_OCF_FIPS
++ if (bufcnt > 0 && rndtest_buf((unsigned char *) &buf[0])) {
++ dprintk("crypto: buffer had fips errors, discarding\n");
++ bufcnt = 0;
++ }
++#endif
++
++ /*
++ * if we have a certified buffer, we can send some data
++ * to /dev/random and move along
++ */
++ if (bufcnt > 0) {
++ /* add what we have */
++ random_input_words(buf, bufcnt, bufcnt*sizeof(int)*8);
++ bufcnt = 0;
++ }
++
++ /* give up CPU for a bit so we don't hog while filling */
++ schedule();
++
++ /* wait for needing more */
++ wantcnt = random_input_wait();
++
++ if (wantcnt <= 0)
++ wantcnt = 0; /* try to get some info again */
++ else
++ /* round up to one word or we can loop forever */
++ wantcnt = (wantcnt + (sizeof(int)*8)) / (sizeof(int)*8);
++ if (wantcnt > NUM_INT) {
++ wantcnt = NUM_INT;
++ }
++
++ if (signal_pending(current)) {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_lock_irq(&current->sigmask_lock);
++#endif
++ flush_signals(current);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++ spin_unlock_irq(&current->sigmask_lock);
++#endif
++ }
++ }
++
++ kfree(buf);
++
++bad_alloc:
++ spin_lock_irq(&random_lock);
++ randomproc = (pid_t) -1;
++ started = 0;
++ spin_unlock_irq(&random_lock);
++
++ return retval;
++}
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/README linux-2.6.30/crypto/ocf/README
+--- linux-2.6.30.orig/crypto/ocf/README 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/README 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,167 @@
++README - ocf-linux-20071215
++---------------------------
++
++This README provides instructions for getting ocf-linux compiled and
++operating in a generic linux environment. For other information you
++might like to visit the home page for this project:
++
++ http://ocf-linux.sourceforge.net/
++
++Adding OCF to linux
++-------------------
++
++ Not much in this file for now, just some notes. I usually build
++ the ocf support as modules but it can be built into the kernel as
++ well. To use it:
++
++ * mknod /dev/crypto c 10 70
++
++ * to add OCF to your kernel source, you have two options. Apply
++ the kernel specific patch:
++
++ cd linux-2.4*; gunzip < ocf-linux-24-XXXXXXXX.patch.gz | patch -p1
++ cd linux-2.6*; gunzip < ocf-linux-26-XXXXXXXX.patch.gz | patch -p1
++
++ if you do one of the above, then you can proceed to the next step,
++ or you can do the above process by hand with using the patches against
++ linux-2.4.35 and 2.6.23 to include the ocf code under crypto/ocf.
++ Here's how to add it:
++
++ for 2.4.35 (and later)
++
++ cd linux-2.4.35/crypto
++ tar xvzf ocf-linux.tar.gz
++ cd ..
++ patch -p1 < crypto/ocf/patches/linux-2.4.35-ocf.patch
++
++ for 2.6.23 (and later), find the kernel patch specific (or nearest)
++ to your kernel versions and then:
++
++ cd linux-2.6.NN/crypto
++ tar xvzf ocf-linux.tar.gz
++ cd ..
++ patch -p1 < crypto/ocf/patches/linux-2.6.NN-ocf.patch
++
++ It should be easy to take this patch and apply it to other more
++ recent versions of the kernels. The same patches should also work
++ relatively easily on kernels as old as 2.6.11 and 2.4.18.
++
++ * under 2.4 if you are on a non-x86 platform, you may need to:
++
++ cp linux-2.X.x/include/asm-i386/kmap_types.h linux-2.X.x/include/asm-YYY
++
++ so that you can build the kernel crypto support needed for the cryptosoft
++ driver.
++
++ * For simplicity you should enable all the crypto support in your kernel
++ except for the test driver. Likewise for the OCF options. Do not
++ enable OCF crypto drivers for HW that you do not have (for example
++ ixp4xx will not compile on non-Xscale systems).
++
++ * make sure that cryptodev.h (from ocf-linux.tar.gz) is installed as
++ crypto/cryptodev.h in an include directory that is used for building
++ applications for your platform. For example on a host system that
++ might be:
++
++ /usr/include/crypto/cryptodev.h
++
++ * patch your openssl-0.9.8i code with the openssl-0.9.8i.patch.
++ (NOTE: there is no longer a need to patch ssh). The patch is against:
++ openssl-0_9_8e
++
++ If you need a patch for an older version of openssl, you should look
++ to older OCF releases. This patch is unlikely to work on older
++ openssl versions.
++
++ openssl-0.9.8i.patch
++ - enables --with-cryptodev for non BSD systems
++ - adds -cpu option to openssl speed for calculating CPU load
++ under linux
++ - fixes null pointer in openssl speed multi thread output.
++ - fixes test keys to work with linux crypto's more stringent
++ key checking.
++ - adds MD5/SHA acceleration (Ronen Shitrit), only enabled
++ with the --with-cryptodev-digests option
++ - fixes bug in engine code caching.
++
++ * build crypto-tools-XXXXXXXX.tar.gz if you want to try some of the BSD
++ tools for testing OCF (ie., cryptotest).
++
++How to load the OCF drivers
++---------------------------
++
++ First insert the base modules:
++
++ insmod ocf
++ insmod cryptodev
++
++ You can then install the software OCF driver with:
++
++ insmod cryptosoft
++
++ and one or more of the OCF HW drivers with:
++
++ insmod safe
++ insmod hifn7751
++ insmod ixp4xx
++ ...
++
++ all the drivers take a debug option to enable verbose debug so that
++ you can see what is going on. For debug you load them as:
++
++ insmod ocf crypto_debug=1
++ insmod cryptodev cryptodev_debug=1
++ insmod cryptosoft swcr_debug=1
++
++ You may load more than one OCF crypto driver but then there is no guarantee
++ as to which will be used.
++
++ You can also enable debug at run time on 2.6 systems with the following:
++
++ echo 1 > /sys/module/ocf/parameters/crypto_debug
++ echo 1 > /sys/module/cryptodev/parameters/cryptodev_debug
++ echo 1 > /sys/module/cryptosoft/parameters/swcr_debug
++ echo 1 > /sys/module/hifn7751/parameters/hifn_debug
++ echo 1 > /sys/module/safe/parameters/safe_debug
++ echo 1 > /sys/module/ixp4xx/parameters/ixp_debug
++ ...
++
++Testing the OCF support
++-----------------------
++
++ run "cryptotest", it should do a short test for a couple of
++ des packets. If it does everything is working.
++
++ If this works, then ssh will use the driver when invoked as:
++
++ ssh -c 3des username@host
++
++ to see for sure that it is operating, enable debug as defined above.
++
++ To get a better idea of performance run:
++
++ cryptotest 100 4096
++
++ There are more options to cryptotest, see the help.
++
++ It is also possible to use openssl to test the speed of the crypto
++ drivers.
++
++ openssl speed -evp des -engine cryptodev -elapsed
++ openssl speed -evp des3 -engine cryptodev -elapsed
++ openssl speed -evp aes128 -engine cryptodev -elapsed
++
++ and multiple threads (10) with:
++
++ openssl speed -evp des -engine cryptodev -elapsed -multi 10
++ openssl speed -evp des3 -engine cryptodev -elapsed -multi 10
++ openssl speed -evp aes128 -engine cryptodev -elapsed -multi 10
++
++ for public key testing you can try:
++
++ cryptokeytest
++ openssl speed -engine cryptodev rsa -elapsed
++ openssl speed -engine cryptodev dsa -elapsed
++
++David McCullough
++david_mccullough@securecomputing.com
+diff -Nur linux-2.6.30.orig/crypto/ocf/rndtest.c linux-2.6.30/crypto/ocf/rndtest.c
+--- linux-2.6.30.orig/crypto/ocf/rndtest.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/rndtest.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,300 @@
++/* $OpenBSD$ */
++
++/*
++ * OCF/Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ * The license and original author are listed below.
++ *
++ * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. All advertising materials mentioning features or use of this software
++ * must display the following acknowledgement:
++ * This product includes software developed by Jason L. Wright
++ * 4. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
++ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
++ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
++ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
++ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
++ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
++ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
++ * POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/list.h>
++#include <linux/wait.h>
++#include <linux/time.h>
++#include <linux/version.h>
++#include <linux/unistd.h>
++#include <linux/kernel.h>
++#include <linux/string.h>
++#include <linux/time.h>
++#include <cryptodev.h>
++#include "rndtest.h"
++
++static struct rndtest_stats rndstats;
++
++static void rndtest_test(struct rndtest_state *);
++
++/* The tests themselves */
++static int rndtest_monobit(struct rndtest_state *);
++static int rndtest_runs(struct rndtest_state *);
++static int rndtest_longruns(struct rndtest_state *);
++static int rndtest_chi_4(struct rndtest_state *);
++
++static int rndtest_runs_check(struct rndtest_state *, int, int *);
++static void rndtest_runs_record(struct rndtest_state *, int, int *);
++
++static const struct rndtest_testfunc {
++ int (*test)(struct rndtest_state *);
++} rndtest_funcs[] = {
++ { rndtest_monobit },
++ { rndtest_runs },
++ { rndtest_chi_4 },
++ { rndtest_longruns },
++};
++
++#define RNDTEST_NTESTS (sizeof(rndtest_funcs)/sizeof(rndtest_funcs[0]))
++
++static void
++rndtest_test(struct rndtest_state *rsp)
++{
++ int i, rv = 0;
++
++ rndstats.rst_tests++;
++ for (i = 0; i < RNDTEST_NTESTS; i++)
++ rv |= (*rndtest_funcs[i].test)(rsp);
++ rsp->rs_discard = (rv != 0);
++}
++
++
++extern int crypto_debug;
++#define rndtest_verbose 2
++#define rndtest_report(rsp, failure, fmt, a...) \
++ { if (failure || crypto_debug) { printk("rng_test: " fmt "\n", a); } else; }
++
++#define RNDTEST_MONOBIT_MINONES 9725
++#define RNDTEST_MONOBIT_MAXONES 10275
++
++static int
++rndtest_monobit(struct rndtest_state *rsp)
++{
++ int i, ones = 0, j;
++ u_int8_t r;
++
++ for (i = 0; i < RNDTEST_NBYTES; i++) {
++ r = rsp->rs_buf[i];
++ for (j = 0; j < 8; j++, r <<= 1)
++ if (r & 0x80)
++ ones++;
++ }
++ if (ones > RNDTEST_MONOBIT_MINONES &&
++ ones < RNDTEST_MONOBIT_MAXONES) {
++ if (rndtest_verbose > 1)
++ rndtest_report(rsp, 0, "monobit pass (%d < %d < %d)",
++ RNDTEST_MONOBIT_MINONES, ones,
++ RNDTEST_MONOBIT_MAXONES);
++ return (0);
++ } else {
++ if (rndtest_verbose)
++ rndtest_report(rsp, 1,
++ "monobit failed (%d ones)", ones);
++ rndstats.rst_monobit++;
++ return (-1);
++ }
++}
++
++#define RNDTEST_RUNS_NINTERVAL 6
++
++static const struct rndtest_runs_tabs {
++ u_int16_t min, max;
++} rndtest_runs_tab[] = {
++ { 2343, 2657 },
++ { 1135, 1365 },
++ { 542, 708 },
++ { 251, 373 },
++ { 111, 201 },
++ { 111, 201 },
++};
++
++static int
++rndtest_runs(struct rndtest_state *rsp)
++{
++ int i, j, ones, zeros, rv = 0;
++ int onei[RNDTEST_RUNS_NINTERVAL], zeroi[RNDTEST_RUNS_NINTERVAL];
++ u_int8_t c;
++
++ bzero(onei, sizeof(onei));
++ bzero(zeroi, sizeof(zeroi));
++ ones = zeros = 0;
++ for (i = 0; i < RNDTEST_NBYTES; i++) {
++ c = rsp->rs_buf[i];
++ for (j = 0; j < 8; j++, c <<= 1) {
++ if (c & 0x80) {
++ ones++;
++ rndtest_runs_record(rsp, zeros, zeroi);
++ zeros = 0;
++ } else {
++ zeros++;
++ rndtest_runs_record(rsp, ones, onei);
++ ones = 0;
++ }
++ }
++ }
++ rndtest_runs_record(rsp, ones, onei);
++ rndtest_runs_record(rsp, zeros, zeroi);
++
++ rv |= rndtest_runs_check(rsp, 0, zeroi);
++ rv |= rndtest_runs_check(rsp, 1, onei);
++
++ if (rv)
++ rndstats.rst_runs++;
++
++ return (rv);
++}
++
++static void
++rndtest_runs_record(struct rndtest_state *rsp, int len, int *intrv)
++{
++ if (len == 0)
++ return;
++ if (len > RNDTEST_RUNS_NINTERVAL)
++ len = RNDTEST_RUNS_NINTERVAL;
++ len -= 1;
++ intrv[len]++;
++}
++
++static int
++rndtest_runs_check(struct rndtest_state *rsp, int val, int *src)
++{
++ int i, rv = 0;
++
++ for (i = 0; i < RNDTEST_RUNS_NINTERVAL; i++) {
++ if (src[i] < rndtest_runs_tab[i].min ||
++ src[i] > rndtest_runs_tab[i].max) {
++ rndtest_report(rsp, 1,
++ "%s interval %d failed (%d, %d-%d)",
++ val ? "ones" : "zeros",
++ i + 1, src[i], rndtest_runs_tab[i].min,
++ rndtest_runs_tab[i].max);
++ rv = -1;
++ } else {
++ rndtest_report(rsp, 0,
++ "runs pass %s interval %d (%d < %d < %d)",
++ val ? "ones" : "zeros",
++ i + 1, rndtest_runs_tab[i].min, src[i],
++ rndtest_runs_tab[i].max);
++ }
++ }
++ return (rv);
++}
++
++static int
++rndtest_longruns(struct rndtest_state *rsp)
++{
++ int i, j, ones = 0, zeros = 0, maxones = 0, maxzeros = 0;
++ u_int8_t c;
++
++ for (i = 0; i < RNDTEST_NBYTES; i++) {
++ c = rsp->rs_buf[i];
++ for (j = 0; j < 8; j++, c <<= 1) {
++ if (c & 0x80) {
++ zeros = 0;
++ ones++;
++ if (ones > maxones)
++ maxones = ones;
++ } else {
++ ones = 0;
++ zeros++;
++ if (zeros > maxzeros)
++ maxzeros = zeros;
++ }
++ }
++ }
++
++ if (maxones < 26 && maxzeros < 26) {
++ rndtest_report(rsp, 0, "longruns pass (%d ones, %d zeros)",
++ maxones, maxzeros);
++ return (0);
++ } else {
++ rndtest_report(rsp, 1, "longruns fail (%d ones, %d zeros)",
++ maxones, maxzeros);
++ rndstats.rst_longruns++;
++ return (-1);
++ }
++}
++
++/*
++ * chi^2 test over 4 bits: (this is called the poker test in FIPS 140-2,
++ * but it is really the chi^2 test over 4 bits (the poker test as described
++ * by Knuth vol 2 is something different, and I take him as authoritative
++ * on nomenclature over NIST).
++ */
++#define RNDTEST_CHI4_K 16
++#define RNDTEST_CHI4_K_MASK (RNDTEST_CHI4_K - 1)
++
++/*
++ * The unnormalized values are used so that we don't have to worry about
++ * fractional precision. The "real" value is found by:
++ * (V - 1562500) * (16 / 5000) = Vn (where V is the unnormalized value)
++ */
++#define RNDTEST_CHI4_VMIN 1563181 /* 2.1792 */
++#define RNDTEST_CHI4_VMAX 1576929 /* 46.1728 */
++
++static int
++rndtest_chi_4(struct rndtest_state *rsp)
++{
++ unsigned int freq[RNDTEST_CHI4_K], i, sum;
++
++ for (i = 0; i < RNDTEST_CHI4_K; i++)
++ freq[i] = 0;
++
++ /* Get number of occurances of each 4 bit pattern */
++ for (i = 0; i < RNDTEST_NBYTES; i++) {
++ freq[(rsp->rs_buf[i] >> 4) & RNDTEST_CHI4_K_MASK]++;
++ freq[(rsp->rs_buf[i] >> 0) & RNDTEST_CHI4_K_MASK]++;
++ }
++
++ for (i = 0, sum = 0; i < RNDTEST_CHI4_K; i++)
++ sum += freq[i] * freq[i];
++
++ if (sum >= 1563181 && sum <= 1576929) {
++ rndtest_report(rsp, 0, "chi^2(4): pass (sum %u)", sum);
++ return (0);
++ } else {
++ rndtest_report(rsp, 1, "chi^2(4): failed (sum %u)", sum);
++ rndstats.rst_chi++;
++ return (-1);
++ }
++}
++
++int
++rndtest_buf(unsigned char *buf)
++{
++ struct rndtest_state rsp;
++
++ memset(&rsp, 0, sizeof(rsp));
++ rsp.rs_buf = buf;
++ rndtest_test(&rsp);
++ return(rsp.rs_discard);
++}
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/rndtest.h linux-2.6.30/crypto/ocf/rndtest.h
+--- linux-2.6.30.orig/crypto/ocf/rndtest.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/rndtest.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,54 @@
++/* $FreeBSD: src/sys/dev/rndtest/rndtest.h,v 1.1 2003/03/11 22:54:44 sam Exp $ */
++/* $OpenBSD$ */
++
++/*
++ * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. All advertising materials mentioning features or use of this software
++ * must display the following acknowledgement:
++ * This product includes software developed by Jason L. Wright
++ * 4. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
++ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
++ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
++ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
++ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
++ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
++ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
++ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
++ * POSSIBILITY OF SUCH DAMAGE.
++ */
++
++
++/* Some of the tests depend on these values */
++#define RNDTEST_NBYTES 2500
++#define RNDTEST_NBITS (8 * RNDTEST_NBYTES)
++
++struct rndtest_state {
++ int rs_discard; /* discard/accept random data */
++ u_int8_t *rs_buf;
++};
++
++struct rndtest_stats {
++ u_int32_t rst_discard; /* number of bytes discarded */
++ u_int32_t rst_tests; /* number of test runs */
++ u_int32_t rst_monobit; /* monobit test failures */
++ u_int32_t rst_runs; /* 0/1 runs failures */
++ u_int32_t rst_longruns; /* longruns failures */
++ u_int32_t rst_chi; /* chi^2 failures */
++};
++
++extern int rndtest_buf(unsigned char *buf);
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/Makefile linux-2.6.30/crypto/ocf/safe/Makefile
+--- linux-2.6.30.orig/crypto/ocf/safe/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,12 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++obj-$(CONFIG_OCF_SAFE) += safe.o
++
++obj ?= .
++EXTRA_CFLAGS += -I$(obj)/.. -I$(obj)/
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/md5.c linux-2.6.30/crypto/ocf/safe/md5.c
+--- linux-2.6.30.orig/crypto/ocf/safe/md5.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/md5.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,308 @@
++/* $KAME: md5.c,v 1.5 2000/11/08 06:13:08 itojun Exp $ */
++/*
++ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the project nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ */
++
++#if 0
++#include <sys/cdefs.h>
++__FBSDID("$FreeBSD: src/sys/crypto/md5.c,v 1.9 2004/01/27 19:49:19 des Exp $");
++
++#include <sys/types.h>
++#include <sys/cdefs.h>
++#include <sys/time.h>
++#include <sys/systm.h>
++#include <crypto/md5.h>
++#endif
++
++#define SHIFT(X, s) (((X) << (s)) | ((X) >> (32 - (s))))
++
++#define F(X, Y, Z) (((X) & (Y)) | ((~X) & (Z)))
++#define G(X, Y, Z) (((X) & (Z)) | ((Y) & (~Z)))
++#define H(X, Y, Z) ((X) ^ (Y) ^ (Z))
++#define I(X, Y, Z) ((Y) ^ ((X) | (~Z)))
++
++#define ROUND1(a, b, c, d, k, s, i) { \
++ (a) = (a) + F((b), (c), (d)) + X[(k)] + T[(i)]; \
++ (a) = SHIFT((a), (s)); \
++ (a) = (b) + (a); \
++}
++
++#define ROUND2(a, b, c, d, k, s, i) { \
++ (a) = (a) + G((b), (c), (d)) + X[(k)] + T[(i)]; \
++ (a) = SHIFT((a), (s)); \
++ (a) = (b) + (a); \
++}
++
++#define ROUND3(a, b, c, d, k, s, i) { \
++ (a) = (a) + H((b), (c), (d)) + X[(k)] + T[(i)]; \
++ (a) = SHIFT((a), (s)); \
++ (a) = (b) + (a); \
++}
++
++#define ROUND4(a, b, c, d, k, s, i) { \
++ (a) = (a) + I((b), (c), (d)) + X[(k)] + T[(i)]; \
++ (a) = SHIFT((a), (s)); \
++ (a) = (b) + (a); \
++}
++
++#define Sa 7
++#define Sb 12
++#define Sc 17
++#define Sd 22
++
++#define Se 5
++#define Sf 9
++#define Sg 14
++#define Sh 20
++
++#define Si 4
++#define Sj 11
++#define Sk 16
++#define Sl 23
++
++#define Sm 6
++#define Sn 10
++#define So 15
++#define Sp 21
++
++#define MD5_A0 0x67452301
++#define MD5_B0 0xefcdab89
++#define MD5_C0 0x98badcfe
++#define MD5_D0 0x10325476
++
++/* Integer part of 4294967296 times abs(sin(i)), where i is in radians. */
++static const u_int32_t T[65] = {
++ 0,
++ 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
++ 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
++ 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
++ 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
++
++ 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
++ 0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
++ 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
++ 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
++
++ 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
++ 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
++ 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
++ 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
++
++ 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
++ 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
++ 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
++ 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391,
++};
++
++static const u_int8_t md5_paddat[MD5_BUFLEN] = {
++ 0x80, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++ 0, 0, 0, 0, 0, 0, 0, 0,
++};
++
++static void md5_calc(u_int8_t *, md5_ctxt *);
++
++void md5_init(ctxt)
++ md5_ctxt *ctxt;
++{
++ ctxt->md5_n = 0;
++ ctxt->md5_i = 0;
++ ctxt->md5_sta = MD5_A0;
++ ctxt->md5_stb = MD5_B0;
++ ctxt->md5_stc = MD5_C0;
++ ctxt->md5_std = MD5_D0;
++ bzero(ctxt->md5_buf, sizeof(ctxt->md5_buf));
++}
++
++void md5_loop(ctxt, input, len)
++ md5_ctxt *ctxt;
++ u_int8_t *input;
++ u_int len; /* number of bytes */
++{
++ u_int gap, i;
++
++ ctxt->md5_n += len * 8; /* byte to bit */
++ gap = MD5_BUFLEN - ctxt->md5_i;
++
++ if (len >= gap) {
++ bcopy((void *)input, (void *)(ctxt->md5_buf + ctxt->md5_i),
++ gap);
++ md5_calc(ctxt->md5_buf, ctxt);
++
++ for (i = gap; i + MD5_BUFLEN <= len; i += MD5_BUFLEN) {
++ md5_calc((u_int8_t *)(input + i), ctxt);
++ }
++
++ ctxt->md5_i = len - i;
++ bcopy((void *)(input + i), (void *)ctxt->md5_buf, ctxt->md5_i);
++ } else {
++ bcopy((void *)input, (void *)(ctxt->md5_buf + ctxt->md5_i),
++ len);
++ ctxt->md5_i += len;
++ }
++}
++
++void md5_pad(ctxt)
++ md5_ctxt *ctxt;
++{
++ u_int gap;
++
++ /* Don't count up padding. Keep md5_n. */
++ gap = MD5_BUFLEN - ctxt->md5_i;
++ if (gap > 8) {
++ bcopy(md5_paddat,
++ (void *)(ctxt->md5_buf + ctxt->md5_i),
++ gap - sizeof(ctxt->md5_n));
++ } else {
++ /* including gap == 8 */
++ bcopy(md5_paddat, (void *)(ctxt->md5_buf + ctxt->md5_i),
++ gap);
++ md5_calc(ctxt->md5_buf, ctxt);
++ bcopy((md5_paddat + gap),
++ (void *)ctxt->md5_buf,
++ MD5_BUFLEN - sizeof(ctxt->md5_n));
++ }
++
++ /* 8 byte word */
++#if BYTE_ORDER == LITTLE_ENDIAN
++ bcopy(&ctxt->md5_n8[0], &ctxt->md5_buf[56], 8);
++#endif
++#if BYTE_ORDER == BIG_ENDIAN
++ ctxt->md5_buf[56] = ctxt->md5_n8[7];
++ ctxt->md5_buf[57] = ctxt->md5_n8[6];
++ ctxt->md5_buf[58] = ctxt->md5_n8[5];
++ ctxt->md5_buf[59] = ctxt->md5_n8[4];
++ ctxt->md5_buf[60] = ctxt->md5_n8[3];
++ ctxt->md5_buf[61] = ctxt->md5_n8[2];
++ ctxt->md5_buf[62] = ctxt->md5_n8[1];
++ ctxt->md5_buf[63] = ctxt->md5_n8[0];
++#endif
++
++ md5_calc(ctxt->md5_buf, ctxt);
++}
++
++void md5_result(digest, ctxt)
++ u_int8_t *digest;
++ md5_ctxt *ctxt;
++{
++ /* 4 byte words */
++#if BYTE_ORDER == LITTLE_ENDIAN
++ bcopy(&ctxt->md5_st8[0], digest, 16);
++#endif
++#if BYTE_ORDER == BIG_ENDIAN
++ digest[ 0] = ctxt->md5_st8[ 3]; digest[ 1] = ctxt->md5_st8[ 2];
++ digest[ 2] = ctxt->md5_st8[ 1]; digest[ 3] = ctxt->md5_st8[ 0];
++ digest[ 4] = ctxt->md5_st8[ 7]; digest[ 5] = ctxt->md5_st8[ 6];
++ digest[ 6] = ctxt->md5_st8[ 5]; digest[ 7] = ctxt->md5_st8[ 4];
++ digest[ 8] = ctxt->md5_st8[11]; digest[ 9] = ctxt->md5_st8[10];
++ digest[10] = ctxt->md5_st8[ 9]; digest[11] = ctxt->md5_st8[ 8];
++ digest[12] = ctxt->md5_st8[15]; digest[13] = ctxt->md5_st8[14];
++ digest[14] = ctxt->md5_st8[13]; digest[15] = ctxt->md5_st8[12];
++#endif
++}
++
++static void md5_calc(b64, ctxt)
++ u_int8_t *b64;
++ md5_ctxt *ctxt;
++{
++ u_int32_t A = ctxt->md5_sta;
++ u_int32_t B = ctxt->md5_stb;
++ u_int32_t C = ctxt->md5_stc;
++ u_int32_t D = ctxt->md5_std;
++#if BYTE_ORDER == LITTLE_ENDIAN
++ u_int32_t *X = (u_int32_t *)b64;
++#endif
++#if BYTE_ORDER == BIG_ENDIAN
++ /* 4 byte words */
++ /* what a brute force but fast! */
++ u_int32_t X[16];
++ u_int8_t *y = (u_int8_t *)X;
++ y[ 0] = b64[ 3]; y[ 1] = b64[ 2]; y[ 2] = b64[ 1]; y[ 3] = b64[ 0];
++ y[ 4] = b64[ 7]; y[ 5] = b64[ 6]; y[ 6] = b64[ 5]; y[ 7] = b64[ 4];
++ y[ 8] = b64[11]; y[ 9] = b64[10]; y[10] = b64[ 9]; y[11] = b64[ 8];
++ y[12] = b64[15]; y[13] = b64[14]; y[14] = b64[13]; y[15] = b64[12];
++ y[16] = b64[19]; y[17] = b64[18]; y[18] = b64[17]; y[19] = b64[16];
++ y[20] = b64[23]; y[21] = b64[22]; y[22] = b64[21]; y[23] = b64[20];
++ y[24] = b64[27]; y[25] = b64[26]; y[26] = b64[25]; y[27] = b64[24];
++ y[28] = b64[31]; y[29] = b64[30]; y[30] = b64[29]; y[31] = b64[28];
++ y[32] = b64[35]; y[33] = b64[34]; y[34] = b64[33]; y[35] = b64[32];
++ y[36] = b64[39]; y[37] = b64[38]; y[38] = b64[37]; y[39] = b64[36];
++ y[40] = b64[43]; y[41] = b64[42]; y[42] = b64[41]; y[43] = b64[40];
++ y[44] = b64[47]; y[45] = b64[46]; y[46] = b64[45]; y[47] = b64[44];
++ y[48] = b64[51]; y[49] = b64[50]; y[50] = b64[49]; y[51] = b64[48];
++ y[52] = b64[55]; y[53] = b64[54]; y[54] = b64[53]; y[55] = b64[52];
++ y[56] = b64[59]; y[57] = b64[58]; y[58] = b64[57]; y[59] = b64[56];
++ y[60] = b64[63]; y[61] = b64[62]; y[62] = b64[61]; y[63] = b64[60];
++#endif
++
++ ROUND1(A, B, C, D, 0, Sa, 1); ROUND1(D, A, B, C, 1, Sb, 2);
++ ROUND1(C, D, A, B, 2, Sc, 3); ROUND1(B, C, D, A, 3, Sd, 4);
++ ROUND1(A, B, C, D, 4, Sa, 5); ROUND1(D, A, B, C, 5, Sb, 6);
++ ROUND1(C, D, A, B, 6, Sc, 7); ROUND1(B, C, D, A, 7, Sd, 8);
++ ROUND1(A, B, C, D, 8, Sa, 9); ROUND1(D, A, B, C, 9, Sb, 10);
++ ROUND1(C, D, A, B, 10, Sc, 11); ROUND1(B, C, D, A, 11, Sd, 12);
++ ROUND1(A, B, C, D, 12, Sa, 13); ROUND1(D, A, B, C, 13, Sb, 14);
++ ROUND1(C, D, A, B, 14, Sc, 15); ROUND1(B, C, D, A, 15, Sd, 16);
++
++ ROUND2(A, B, C, D, 1, Se, 17); ROUND2(D, A, B, C, 6, Sf, 18);
++ ROUND2(C, D, A, B, 11, Sg, 19); ROUND2(B, C, D, A, 0, Sh, 20);
++ ROUND2(A, B, C, D, 5, Se, 21); ROUND2(D, A, B, C, 10, Sf, 22);
++ ROUND2(C, D, A, B, 15, Sg, 23); ROUND2(B, C, D, A, 4, Sh, 24);
++ ROUND2(A, B, C, D, 9, Se, 25); ROUND2(D, A, B, C, 14, Sf, 26);
++ ROUND2(C, D, A, B, 3, Sg, 27); ROUND2(B, C, D, A, 8, Sh, 28);
++ ROUND2(A, B, C, D, 13, Se, 29); ROUND2(D, A, B, C, 2, Sf, 30);
++ ROUND2(C, D, A, B, 7, Sg, 31); ROUND2(B, C, D, A, 12, Sh, 32);
++
++ ROUND3(A, B, C, D, 5, Si, 33); ROUND3(D, A, B, C, 8, Sj, 34);
++ ROUND3(C, D, A, B, 11, Sk, 35); ROUND3(B, C, D, A, 14, Sl, 36);
++ ROUND3(A, B, C, D, 1, Si, 37); ROUND3(D, A, B, C, 4, Sj, 38);
++ ROUND3(C, D, A, B, 7, Sk, 39); ROUND3(B, C, D, A, 10, Sl, 40);
++ ROUND3(A, B, C, D, 13, Si, 41); ROUND3(D, A, B, C, 0, Sj, 42);
++ ROUND3(C, D, A, B, 3, Sk, 43); ROUND3(B, C, D, A, 6, Sl, 44);
++ ROUND3(A, B, C, D, 9, Si, 45); ROUND3(D, A, B, C, 12, Sj, 46);
++ ROUND3(C, D, A, B, 15, Sk, 47); ROUND3(B, C, D, A, 2, Sl, 48);
++
++ ROUND4(A, B, C, D, 0, Sm, 49); ROUND4(D, A, B, C, 7, Sn, 50);
++ ROUND4(C, D, A, B, 14, So, 51); ROUND4(B, C, D, A, 5, Sp, 52);
++ ROUND4(A, B, C, D, 12, Sm, 53); ROUND4(D, A, B, C, 3, Sn, 54);
++ ROUND4(C, D, A, B, 10, So, 55); ROUND4(B, C, D, A, 1, Sp, 56);
++ ROUND4(A, B, C, D, 8, Sm, 57); ROUND4(D, A, B, C, 15, Sn, 58);
++ ROUND4(C, D, A, B, 6, So, 59); ROUND4(B, C, D, A, 13, Sp, 60);
++ ROUND4(A, B, C, D, 4, Sm, 61); ROUND4(D, A, B, C, 11, Sn, 62);
++ ROUND4(C, D, A, B, 2, So, 63); ROUND4(B, C, D, A, 9, Sp, 64);
++
++ ctxt->md5_sta += A;
++ ctxt->md5_stb += B;
++ ctxt->md5_stc += C;
++ ctxt->md5_std += D;
++}
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/md5.h linux-2.6.30/crypto/ocf/safe/md5.h
+--- linux-2.6.30.orig/crypto/ocf/safe/md5.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/md5.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,76 @@
++/* $FreeBSD: src/sys/crypto/md5.h,v 1.4 2002/03/20 05:13:50 alfred Exp $ */
++/* $KAME: md5.h,v 1.4 2000/03/27 04:36:22 sumikawa Exp $ */
++
++/*
++ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the project nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ */
++
++#ifndef _NETINET6_MD5_H_
++#define _NETINET6_MD5_H_
++
++#define MD5_BUFLEN 64
++
++typedef struct {
++ union {
++ u_int32_t md5_state32[4];
++ u_int8_t md5_state8[16];
++ } md5_st;
++
++#define md5_sta md5_st.md5_state32[0]
++#define md5_stb md5_st.md5_state32[1]
++#define md5_stc md5_st.md5_state32[2]
++#define md5_std md5_st.md5_state32[3]
++#define md5_st8 md5_st.md5_state8
++
++ union {
++ u_int64_t md5_count64;
++ u_int8_t md5_count8[8];
++ } md5_count;
++#define md5_n md5_count.md5_count64
++#define md5_n8 md5_count.md5_count8
++
++ u_int md5_i;
++ u_int8_t md5_buf[MD5_BUFLEN];
++} md5_ctxt;
++
++extern void md5_init(md5_ctxt *);
++extern void md5_loop(md5_ctxt *, u_int8_t *, u_int);
++extern void md5_pad(md5_ctxt *);
++extern void md5_result(u_int8_t *, md5_ctxt *);
++
++/* compatibility */
++#define MD5_CTX md5_ctxt
++#define MD5Init(x) md5_init((x))
++#define MD5Update(x, y, z) md5_loop((x), (y), (z))
++#define MD5Final(x, y) \
++do { \
++ md5_pad((y)); \
++ md5_result((x), (y)); \
++} while (0)
++
++#endif /* ! _NETINET6_MD5_H_*/
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/safe.c linux-2.6.30/crypto/ocf/safe/safe.c
+--- linux-2.6.30.orig/crypto/ocf/safe/safe.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/safe.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,2288 @@
++/*-
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2004-2007 David McCullough
++ * The license and original author are listed below.
++ *
++ * Copyright (c) 2003 Sam Leffler, Errno Consulting
++ * Copyright (c) 2003 Global Technology Associates, Inc.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ *
++__FBSDID("$FreeBSD: src/sys/dev/safe/safe.c,v 1.18 2007/03/21 03:42:50 sam Exp $");
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/random.h>
++#include <linux/version.h>
++#include <linux/skbuff.h>
++#include <asm/io.h>
++
++/*
++ * SafeNet SafeXcel-1141 hardware crypto accelerator
++ */
++
++#include <cryptodev.h>
++#include <uio.h>
++#include <safe/safereg.h>
++#include <safe/safevar.h>
++
++#if 1
++#define DPRINTF(a) do { \
++ if (debug) { \
++ printk("%s: ", sc ? \
++ device_get_nameunit(sc->sc_dev) : "safe"); \
++ printk a; \
++ } \
++ } while (0)
++#else
++#define DPRINTF(a)
++#endif
++
++/*
++ * until we find a cleaner way, include the BSD md5/sha1 code
++ * here
++ */
++#define HMAC_HACK 1
++#ifdef HMAC_HACK
++#define LITTLE_ENDIAN 1234
++#define BIG_ENDIAN 4321
++#ifdef __LITTLE_ENDIAN
++#define BYTE_ORDER LITTLE_ENDIAN
++#endif
++#ifdef __BIG_ENDIAN
++#define BYTE_ORDER BIG_ENDIAN
++#endif
++#include <safe/md5.h>
++#include <safe/md5.c>
++#include <safe/sha1.h>
++#include <safe/sha1.c>
++
++u_int8_t hmac_ipad_buffer[64] = {
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
++ 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36
++};
++
++u_int8_t hmac_opad_buffer[64] = {
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C,
++ 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C
++};
++#endif /* HMAC_HACK */
++
++/* add proc entry for this */
++struct safe_stats safestats;
++
++#define debug safe_debug
++int safe_debug = 0;
++module_param(safe_debug, int, 0644);
++MODULE_PARM_DESC(safe_debug, "Enable debug");
++
++static void safe_callback(struct safe_softc *, struct safe_ringentry *);
++static void safe_feed(struct safe_softc *, struct safe_ringentry *);
++#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG)
++static void safe_rng_init(struct safe_softc *);
++int safe_rngbufsize = 8; /* 32 bytes each read */
++module_param(safe_rngbufsize, int, 0644);
++MODULE_PARM_DESC(safe_rngbufsize, "RNG polling buffer size (32-bit words)");
++int safe_rngmaxalarm = 8; /* max alarms before reset */
++module_param(safe_rngmaxalarm, int, 0644);
++MODULE_PARM_DESC(safe_rngmaxalarm, "RNG max alarms before reset");
++#endif /* SAFE_NO_RNG */
++
++static void safe_totalreset(struct safe_softc *sc);
++static int safe_dmamap_aligned(struct safe_softc *sc, const struct safe_operand *op);
++static int safe_dmamap_uniform(struct safe_softc *sc, const struct safe_operand *op);
++static int safe_free_entry(struct safe_softc *sc, struct safe_ringentry *re);
++static int safe_kprocess(device_t dev, struct cryptkop *krp, int hint);
++static int safe_kstart(struct safe_softc *sc);
++static int safe_ksigbits(struct safe_softc *sc, struct crparam *cr);
++static void safe_kfeed(struct safe_softc *sc);
++static void safe_kpoll(unsigned long arg);
++static void safe_kload_reg(struct safe_softc *sc, u_int32_t off,
++ u_int32_t len, struct crparam *n);
++
++static int safe_newsession(device_t, u_int32_t *, struct cryptoini *);
++static int safe_freesession(device_t, u_int64_t);
++static int safe_process(device_t, struct cryptop *, int);
++
++static device_method_t safe_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, safe_newsession),
++ DEVMETHOD(cryptodev_freesession,safe_freesession),
++ DEVMETHOD(cryptodev_process, safe_process),
++ DEVMETHOD(cryptodev_kprocess, safe_kprocess),
++};
++
++#define READ_REG(sc,r) readl((sc)->sc_base_addr + (r))
++#define WRITE_REG(sc,r,val) writel((val), (sc)->sc_base_addr + (r))
++
++#define SAFE_MAX_CHIPS 8
++static struct safe_softc *safe_chip_idx[SAFE_MAX_CHIPS];
++
++/*
++ * split our buffers up into safe DMAable byte fragments to avoid lockup
++ * bug in 1141 HW on rev 1.0.
++ */
++
++static int
++pci_map_linear(
++ struct safe_softc *sc,
++ struct safe_operand *buf,
++ void *addr,
++ int len)
++{
++ dma_addr_t tmp;
++ int chunk, tlen = len;
++
++ tmp = pci_map_single(sc->sc_pcidev, addr, len, PCI_DMA_BIDIRECTIONAL);
++
++ buf->mapsize += len;
++ while (len > 0) {
++ chunk = (len > sc->sc_max_dsize) ? sc->sc_max_dsize : len;
++ buf->segs[buf->nsegs].ds_addr = tmp;
++ buf->segs[buf->nsegs].ds_len = chunk;
++ buf->segs[buf->nsegs].ds_tlen = tlen;
++ buf->nsegs++;
++ tmp += chunk;
++ len -= chunk;
++ tlen = 0;
++ }
++ return 0;
++}
++
++/*
++ * map in a given uio buffer (great on some arches :-)
++ */
++
++static int
++pci_map_uio(struct safe_softc *sc, struct safe_operand *buf, struct uio *uio)
++{
++ struct iovec *iov = uio->uio_iov;
++ int n;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ buf->mapsize = 0;
++ buf->nsegs = 0;
++
++ for (n = 0; n < uio->uio_iovcnt; n++) {
++ pci_map_linear(sc, buf, iov->iov_base, iov->iov_len);
++ iov++;
++ }
++
++ /* identify this buffer by the first segment */
++ buf->map = (void *) buf->segs[0].ds_addr;
++ return(0);
++}
++
++/*
++ * map in a given sk_buff
++ */
++
++static int
++pci_map_skb(struct safe_softc *sc,struct safe_operand *buf,struct sk_buff *skb)
++{
++ int i;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ buf->mapsize = 0;
++ buf->nsegs = 0;
++
++ pci_map_linear(sc, buf, skb->data, skb_headlen(skb));
++
++ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
++ pci_map_linear(sc, buf,
++ page_address(skb_shinfo(skb)->frags[i].page) +
++ skb_shinfo(skb)->frags[i].page_offset,
++ skb_shinfo(skb)->frags[i].size);
++ }
++
++ /* identify this buffer by the first segment */
++ buf->map = (void *) buf->segs[0].ds_addr;
++ return(0);
++}
++
++
++#if 0 /* not needed at this time */
++static void
++pci_sync_operand(struct safe_softc *sc, struct safe_operand *buf)
++{
++ int i;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++ for (i = 0; i < buf->nsegs; i++)
++ pci_dma_sync_single_for_cpu(sc->sc_pcidev, buf->segs[i].ds_addr,
++ buf->segs[i].ds_len, PCI_DMA_BIDIRECTIONAL);
++}
++#endif
++
++static void
++pci_unmap_operand(struct safe_softc *sc, struct safe_operand *buf)
++{
++ int i;
++ DPRINTF(("%s()\n", __FUNCTION__));
++ for (i = 0; i < buf->nsegs; i++) {
++ if (buf->segs[i].ds_tlen) {
++ DPRINTF(("%s - unmap %d 0x%x %d\n", __FUNCTION__, i, buf->segs[i].ds_addr, buf->segs[i].ds_tlen));
++ pci_unmap_single(sc->sc_pcidev, buf->segs[i].ds_addr,
++ buf->segs[i].ds_tlen, PCI_DMA_BIDIRECTIONAL);
++ DPRINTF(("%s - unmap %d 0x%x %d done\n", __FUNCTION__, i, buf->segs[i].ds_addr, buf->segs[i].ds_tlen));
++ }
++ buf->segs[i].ds_addr = 0;
++ buf->segs[i].ds_len = 0;
++ buf->segs[i].ds_tlen = 0;
++ }
++ buf->nsegs = 0;
++ buf->mapsize = 0;
++ buf->map = 0;
++}
++
++
++/*
++ * SafeXcel Interrupt routine
++ */
++static irqreturn_t
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++safe_intr(int irq, void *arg)
++#else
++safe_intr(int irq, void *arg, struct pt_regs *regs)
++#endif
++{
++ struct safe_softc *sc = arg;
++ int stat;
++ unsigned long flags;
++
++ stat = READ_REG(sc, SAFE_HM_STAT);
++
++ DPRINTF(("%s(stat=0x%x)\n", __FUNCTION__, stat));
++
++ if (stat == 0) /* shared irq, not for us */
++ return IRQ_NONE;
++
++ WRITE_REG(sc, SAFE_HI_CLR, stat); /* IACK */
++
++ if ((stat & SAFE_INT_PE_DDONE)) {
++ /*
++ * Descriptor(s) done; scan the ring and
++ * process completed operations.
++ */
++ spin_lock_irqsave(&sc->sc_ringmtx, flags);
++ while (sc->sc_back != sc->sc_front) {
++ struct safe_ringentry *re = sc->sc_back;
++
++#ifdef SAFE_DEBUG
++ if (debug) {
++ safe_dump_ringstate(sc, __func__);
++ safe_dump_request(sc, __func__, re);
++ }
++#endif
++ /*
++ * safe_process marks ring entries that were allocated
++ * but not used with a csr of zero. This insures the
++ * ring front pointer never needs to be set backwards
++ * in the event that an entry is allocated but not used
++ * because of a setup error.
++ */
++ DPRINTF(("%s re->re_desc.d_csr=0x%x\n", __FUNCTION__, re->re_desc.d_csr));
++ if (re->re_desc.d_csr != 0) {
++ if (!SAFE_PE_CSR_IS_DONE(re->re_desc.d_csr)) {
++ DPRINTF(("%s !CSR_IS_DONE\n", __FUNCTION__));
++ break;
++ }
++ if (!SAFE_PE_LEN_IS_DONE(re->re_desc.d_len)) {
++ DPRINTF(("%s !LEN_IS_DONE\n", __FUNCTION__));
++ break;
++ }
++ sc->sc_nqchip--;
++ safe_callback(sc, re);
++ }
++ if (++(sc->sc_back) == sc->sc_ringtop)
++ sc->sc_back = sc->sc_ring;
++ }
++ spin_unlock_irqrestore(&sc->sc_ringmtx, flags);
++ }
++
++ /*
++ * Check to see if we got any DMA Error
++ */
++ if (stat & SAFE_INT_PE_ERROR) {
++ printk("%s: dmaerr dmastat %08x\n", device_get_nameunit(sc->sc_dev),
++ (int)READ_REG(sc, SAFE_PE_DMASTAT));
++ safestats.st_dmaerr++;
++ safe_totalreset(sc);
++#if 0
++ safe_feed(sc);
++#endif
++ }
++
++ if (sc->sc_needwakeup) { /* XXX check high watermark */
++ int wakeup = sc->sc_needwakeup & (CRYPTO_SYMQ|CRYPTO_ASYMQ);
++ DPRINTF(("%s: wakeup crypto %x\n", __func__,
++ sc->sc_needwakeup));
++ sc->sc_needwakeup &= ~wakeup;
++ crypto_unblock(sc->sc_cid, wakeup);
++ }
++
++ return IRQ_HANDLED;
++}
++
++/*
++ * safe_feed() - post a request to chip
++ */
++static void
++safe_feed(struct safe_softc *sc, struct safe_ringentry *re)
++{
++ DPRINTF(("%s()\n", __FUNCTION__));
++#ifdef SAFE_DEBUG
++ if (debug) {
++ safe_dump_ringstate(sc, __func__);
++ safe_dump_request(sc, __func__, re);
++ }
++#endif
++ sc->sc_nqchip++;
++ if (sc->sc_nqchip > safestats.st_maxqchip)
++ safestats.st_maxqchip = sc->sc_nqchip;
++ /* poke h/w to check descriptor ring, any value can be written */
++ WRITE_REG(sc, SAFE_HI_RD_DESCR, 0);
++}
++
++#define N(a) (sizeof(a) / sizeof (a[0]))
++static void
++safe_setup_enckey(struct safe_session *ses, caddr_t key)
++{
++ int i;
++
++ bcopy(key, ses->ses_key, ses->ses_klen / 8);
++
++ /* PE is little-endian, insure proper byte order */
++ for (i = 0; i < N(ses->ses_key); i++)
++ ses->ses_key[i] = htole32(ses->ses_key[i]);
++}
++
++static void
++safe_setup_mackey(struct safe_session *ses, int algo, caddr_t key, int klen)
++{
++#ifdef HMAC_HACK
++ MD5_CTX md5ctx;
++ SHA1_CTX sha1ctx;
++ int i;
++
++
++ for (i = 0; i < klen; i++)
++ key[i] ^= HMAC_IPAD_VAL;
++
++ if (algo == CRYPTO_MD5_HMAC) {
++ MD5Init(&md5ctx);
++ MD5Update(&md5ctx, key, klen);
++ MD5Update(&md5ctx, hmac_ipad_buffer, MD5_HMAC_BLOCK_LEN - klen);
++ bcopy(md5ctx.md5_st8, ses->ses_hminner, sizeof(md5ctx.md5_st8));
++ } else {
++ SHA1Init(&sha1ctx);
++ SHA1Update(&sha1ctx, key, klen);
++ SHA1Update(&sha1ctx, hmac_ipad_buffer,
++ SHA1_HMAC_BLOCK_LEN - klen);
++ bcopy(sha1ctx.h.b32, ses->ses_hminner, sizeof(sha1ctx.h.b32));
++ }
++
++ for (i = 0; i < klen; i++)
++ key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
++
++ if (algo == CRYPTO_MD5_HMAC) {
++ MD5Init(&md5ctx);
++ MD5Update(&md5ctx, key, klen);
++ MD5Update(&md5ctx, hmac_opad_buffer, MD5_HMAC_BLOCK_LEN - klen);
++ bcopy(md5ctx.md5_st8, ses->ses_hmouter, sizeof(md5ctx.md5_st8));
++ } else {
++ SHA1Init(&sha1ctx);
++ SHA1Update(&sha1ctx, key, klen);
++ SHA1Update(&sha1ctx, hmac_opad_buffer,
++ SHA1_HMAC_BLOCK_LEN - klen);
++ bcopy(sha1ctx.h.b32, ses->ses_hmouter, sizeof(sha1ctx.h.b32));
++ }
++
++ for (i = 0; i < klen; i++)
++ key[i] ^= HMAC_OPAD_VAL;
++
++#if 0
++ /*
++ * this code prevents SHA working on a BE host,
++ * so it is obviously wrong. I think the byte
++ * swap setup we do with the chip fixes this for us
++ */
++
++ /* PE is little-endian, insure proper byte order */
++ for (i = 0; i < N(ses->ses_hminner); i++) {
++ ses->ses_hminner[i] = htole32(ses->ses_hminner[i]);
++ ses->ses_hmouter[i] = htole32(ses->ses_hmouter[i]);
++ }
++#endif
++#else /* HMAC_HACK */
++ printk("safe: md5/sha not implemented\n");
++#endif /* HMAC_HACK */
++}
++#undef N
++
++/*
++ * Allocate a new 'session' and return an encoded session id. 'sidp'
++ * contains our registration id, and should contain an encoded session
++ * id on successful allocation.
++ */
++static int
++safe_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
++{
++ struct safe_softc *sc = device_get_softc(dev);
++ struct cryptoini *c, *encini = NULL, *macini = NULL;
++ struct safe_session *ses = NULL;
++ int sesn;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (sidp == NULL || cri == NULL || sc == NULL)
++ return (EINVAL);
++
++ for (c = cri; c != NULL; c = c->cri_next) {
++ if (c->cri_alg == CRYPTO_MD5_HMAC ||
++ c->cri_alg == CRYPTO_SHA1_HMAC ||
++ c->cri_alg == CRYPTO_NULL_HMAC) {
++ if (macini)
++ return (EINVAL);
++ macini = c;
++ } else if (c->cri_alg == CRYPTO_DES_CBC ||
++ c->cri_alg == CRYPTO_3DES_CBC ||
++ c->cri_alg == CRYPTO_AES_CBC ||
++ c->cri_alg == CRYPTO_NULL_CBC) {
++ if (encini)
++ return (EINVAL);
++ encini = c;
++ } else
++ return (EINVAL);
++ }
++ if (encini == NULL && macini == NULL)
++ return (EINVAL);
++ if (encini) { /* validate key length */
++ switch (encini->cri_alg) {
++ case CRYPTO_DES_CBC:
++ if (encini->cri_klen != 64)
++ return (EINVAL);
++ break;
++ case CRYPTO_3DES_CBC:
++ if (encini->cri_klen != 192)
++ return (EINVAL);
++ break;
++ case CRYPTO_AES_CBC:
++ if (encini->cri_klen != 128 &&
++ encini->cri_klen != 192 &&
++ encini->cri_klen != 256)
++ return (EINVAL);
++ break;
++ }
++ }
++
++ if (sc->sc_sessions == NULL) {
++ ses = sc->sc_sessions = (struct safe_session *)
++ kmalloc(sizeof(struct safe_session), SLAB_ATOMIC);
++ if (ses == NULL)
++ return (ENOMEM);
++ memset(ses, 0, sizeof(struct safe_session));
++ sesn = 0;
++ sc->sc_nsessions = 1;
++ } else {
++ for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
++ if (sc->sc_sessions[sesn].ses_used == 0) {
++ ses = &sc->sc_sessions[sesn];
++ break;
++ }
++ }
++
++ if (ses == NULL) {
++ sesn = sc->sc_nsessions;
++ ses = (struct safe_session *)
++ kmalloc((sesn + 1) * sizeof(struct safe_session), SLAB_ATOMIC);
++ if (ses == NULL)
++ return (ENOMEM);
++ memset(ses, 0, (sesn + 1) * sizeof(struct safe_session));
++ bcopy(sc->sc_sessions, ses, sesn *
++ sizeof(struct safe_session));
++ bzero(sc->sc_sessions, sesn *
++ sizeof(struct safe_session));
++ kfree(sc->sc_sessions);
++ sc->sc_sessions = ses;
++ ses = &sc->sc_sessions[sesn];
++ sc->sc_nsessions++;
++ }
++ }
++
++ bzero(ses, sizeof(struct safe_session));
++ ses->ses_used = 1;
++
++ if (encini) {
++ /* get an IV */
++ /* XXX may read fewer than requested */
++ read_random(ses->ses_iv, sizeof(ses->ses_iv));
++
++ ses->ses_klen = encini->cri_klen;
++ if (encini->cri_key != NULL)
++ safe_setup_enckey(ses, encini->cri_key);
++ }
++
++ if (macini) {
++ ses->ses_mlen = macini->cri_mlen;
++ if (ses->ses_mlen == 0) {
++ if (macini->cri_alg == CRYPTO_MD5_HMAC)
++ ses->ses_mlen = MD5_HASH_LEN;
++ else
++ ses->ses_mlen = SHA1_HASH_LEN;
++ }
++
++ if (macini->cri_key != NULL) {
++ safe_setup_mackey(ses, macini->cri_alg, macini->cri_key,
++ macini->cri_klen / 8);
++ }
++ }
++
++ *sidp = SAFE_SID(device_get_unit(sc->sc_dev), sesn);
++ return (0);
++}
++
++/*
++ * Deallocate a session.
++ */
++static int
++safe_freesession(device_t dev, u_int64_t tid)
++{
++ struct safe_softc *sc = device_get_softc(dev);
++ int session, ret;
++ u_int32_t sid = ((u_int32_t) tid) & 0xffffffff;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (sc == NULL)
++ return (EINVAL);
++
++ session = SAFE_SESSION(sid);
++ if (session < sc->sc_nsessions) {
++ bzero(&sc->sc_sessions[session], sizeof(sc->sc_sessions[session]));
++ ret = 0;
++ } else
++ ret = EINVAL;
++ return (ret);
++}
++
++
++static int
++safe_process(device_t dev, struct cryptop *crp, int hint)
++{
++ struct safe_softc *sc = device_get_softc(dev);
++ int err = 0, i, nicealign, uniform;
++ struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
++ int bypass, oplen, ivsize;
++ caddr_t iv;
++ int16_t coffset;
++ struct safe_session *ses;
++ struct safe_ringentry *re;
++ struct safe_sarec *sa;
++ struct safe_pdesc *pd;
++ u_int32_t cmd0, cmd1, staterec;
++ unsigned long flags;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (crp == NULL || crp->crp_callback == NULL || sc == NULL) {
++ safestats.st_invalid++;
++ return (EINVAL);
++ }
++ if (SAFE_SESSION(crp->crp_sid) >= sc->sc_nsessions) {
++ safestats.st_badsession++;
++ return (EINVAL);
++ }
++
++ spin_lock_irqsave(&sc->sc_ringmtx, flags);
++ if (sc->sc_front == sc->sc_back && sc->sc_nqchip != 0) {
++ safestats.st_ringfull++;
++ sc->sc_needwakeup |= CRYPTO_SYMQ;
++ spin_unlock_irqrestore(&sc->sc_ringmtx, flags);
++ return (ERESTART);
++ }
++ re = sc->sc_front;
++
++ staterec = re->re_sa.sa_staterec; /* save */
++ /* NB: zero everything but the PE descriptor */
++ bzero(&re->re_sa, sizeof(struct safe_ringentry) - sizeof(re->re_desc));
++ re->re_sa.sa_staterec = staterec; /* restore */
++
++ re->re_crp = crp;
++ re->re_sesn = SAFE_SESSION(crp->crp_sid);
++
++ re->re_src.nsegs = 0;
++ re->re_dst.nsegs = 0;
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ re->re_src_skb = (struct sk_buff *)crp->crp_buf;
++ re->re_dst_skb = (struct sk_buff *)crp->crp_buf;
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ re->re_src_io = (struct uio *)crp->crp_buf;
++ re->re_dst_io = (struct uio *)crp->crp_buf;
++ } else {
++ safestats.st_badflags++;
++ err = EINVAL;
++ goto errout; /* XXX we don't handle contiguous blocks! */
++ }
++
++ sa = &re->re_sa;
++ ses = &sc->sc_sessions[re->re_sesn];
++
++ crd1 = crp->crp_desc;
++ if (crd1 == NULL) {
++ safestats.st_nodesc++;
++ err = EINVAL;
++ goto errout;
++ }
++ crd2 = crd1->crd_next;
++
++ cmd0 = SAFE_SA_CMD0_BASIC; /* basic group operation */
++ cmd1 = 0;
++ if (crd2 == NULL) {
++ if (crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_NULL_HMAC) {
++ maccrd = crd1;
++ enccrd = NULL;
++ cmd0 |= SAFE_SA_CMD0_OP_HASH;
++ } else if (crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC ||
++ crd1->crd_alg == CRYPTO_NULL_CBC) {
++ maccrd = NULL;
++ enccrd = crd1;
++ cmd0 |= SAFE_SA_CMD0_OP_CRYPT;
++ } else {
++ safestats.st_badalg++;
++ err = EINVAL;
++ goto errout;
++ }
++ } else {
++ if ((crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_NULL_HMAC) &&
++ (crd2->crd_alg == CRYPTO_DES_CBC ||
++ crd2->crd_alg == CRYPTO_3DES_CBC ||
++ crd2->crd_alg == CRYPTO_AES_CBC ||
++ crd2->crd_alg == CRYPTO_NULL_CBC) &&
++ ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) {
++ maccrd = crd1;
++ enccrd = crd2;
++ } else if ((crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC ||
++ crd1->crd_alg == CRYPTO_NULL_CBC) &&
++ (crd2->crd_alg == CRYPTO_MD5_HMAC ||
++ crd2->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd2->crd_alg == CRYPTO_NULL_HMAC) &&
++ (crd1->crd_flags & CRD_F_ENCRYPT)) {
++ enccrd = crd1;
++ maccrd = crd2;
++ } else {
++ safestats.st_badalg++;
++ err = EINVAL;
++ goto errout;
++ }
++ cmd0 |= SAFE_SA_CMD0_OP_BOTH;
++ }
++
++ if (enccrd) {
++ if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT)
++ safe_setup_enckey(ses, enccrd->crd_key);
++
++ if (enccrd->crd_alg == CRYPTO_DES_CBC) {
++ cmd0 |= SAFE_SA_CMD0_DES;
++ cmd1 |= SAFE_SA_CMD1_CBC;
++ ivsize = 2*sizeof(u_int32_t);
++ } else if (enccrd->crd_alg == CRYPTO_3DES_CBC) {
++ cmd0 |= SAFE_SA_CMD0_3DES;
++ cmd1 |= SAFE_SA_CMD1_CBC;
++ ivsize = 2*sizeof(u_int32_t);
++ } else if (enccrd->crd_alg == CRYPTO_AES_CBC) {
++ cmd0 |= SAFE_SA_CMD0_AES;
++ cmd1 |= SAFE_SA_CMD1_CBC;
++ if (ses->ses_klen == 128)
++ cmd1 |= SAFE_SA_CMD1_AES128;
++ else if (ses->ses_klen == 192)
++ cmd1 |= SAFE_SA_CMD1_AES192;
++ else
++ cmd1 |= SAFE_SA_CMD1_AES256;
++ ivsize = 4*sizeof(u_int32_t);
++ } else {
++ cmd0 |= SAFE_SA_CMD0_CRYPT_NULL;
++ ivsize = 0;
++ }
++
++ /*
++ * Setup encrypt/decrypt state. When using basic ops
++ * we can't use an inline IV because hash/crypt offset
++ * must be from the end of the IV to the start of the
++ * crypt data and this leaves out the preceding header
++ * from the hash calculation. Instead we place the IV
++ * in the state record and set the hash/crypt offset to
++ * copy both the header+IV.
++ */
++ if (enccrd->crd_flags & CRD_F_ENCRYPT) {
++ cmd0 |= SAFE_SA_CMD0_OUTBOUND;
++
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ iv = enccrd->crd_iv;
++ else
++ iv = (caddr_t) ses->ses_iv;
++ if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) {
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize, iv);
++ }
++ bcopy(iv, re->re_sastate.sa_saved_iv, ivsize);
++ /* make iv LE */
++ for (i = 0; i < ivsize/sizeof(re->re_sastate.sa_saved_iv[0]); i++)
++ re->re_sastate.sa_saved_iv[i] =
++ cpu_to_le32(re->re_sastate.sa_saved_iv[i]);
++ cmd0 |= SAFE_SA_CMD0_IVLD_STATE | SAFE_SA_CMD0_SAVEIV;
++ re->re_flags |= SAFE_QFLAGS_COPYOUTIV;
++ } else {
++ cmd0 |= SAFE_SA_CMD0_INBOUND;
++
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) {
++ bcopy(enccrd->crd_iv,
++ re->re_sastate.sa_saved_iv, ivsize);
++ } else {
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize,
++ (caddr_t)re->re_sastate.sa_saved_iv);
++ }
++ /* make iv LE */
++ for (i = 0; i < ivsize/sizeof(re->re_sastate.sa_saved_iv[0]); i++)
++ re->re_sastate.sa_saved_iv[i] =
++ cpu_to_le32(re->re_sastate.sa_saved_iv[i]);
++ cmd0 |= SAFE_SA_CMD0_IVLD_STATE;
++ }
++ /*
++ * For basic encryption use the zero pad algorithm.
++ * This pads results to an 8-byte boundary and
++ * suppresses padding verification for inbound (i.e.
++ * decrypt) operations.
++ *
++ * NB: Not sure if the 8-byte pad boundary is a problem.
++ */
++ cmd0 |= SAFE_SA_CMD0_PAD_ZERO;
++
++ /* XXX assert key bufs have the same size */
++ bcopy(ses->ses_key, sa->sa_key, sizeof(sa->sa_key));
++ }
++
++ if (maccrd) {
++ if (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) {
++ safe_setup_mackey(ses, maccrd->crd_alg,
++ maccrd->crd_key, maccrd->crd_klen / 8);
++ }
++
++ if (maccrd->crd_alg == CRYPTO_MD5_HMAC) {
++ cmd0 |= SAFE_SA_CMD0_MD5;
++ cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */
++ } else if (maccrd->crd_alg == CRYPTO_SHA1_HMAC) {
++ cmd0 |= SAFE_SA_CMD0_SHA1;
++ cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */
++ } else {
++ cmd0 |= SAFE_SA_CMD0_HASH_NULL;
++ }
++ /*
++ * Digest data is loaded from the SA and the hash
++ * result is saved to the state block where we
++ * retrieve it for return to the caller.
++ */
++ /* XXX assert digest bufs have the same size */
++ bcopy(ses->ses_hminner, sa->sa_indigest,
++ sizeof(sa->sa_indigest));
++ bcopy(ses->ses_hmouter, sa->sa_outdigest,
++ sizeof(sa->sa_outdigest));
++
++ cmd0 |= SAFE_SA_CMD0_HSLD_SA | SAFE_SA_CMD0_SAVEHASH;
++ re->re_flags |= SAFE_QFLAGS_COPYOUTICV;
++ }
++
++ if (enccrd && maccrd) {
++ /*
++ * The offset from hash data to the start of
++ * crypt data is the difference in the skips.
++ */
++ bypass = maccrd->crd_skip;
++ coffset = enccrd->crd_skip - maccrd->crd_skip;
++ if (coffset < 0) {
++ DPRINTF(("%s: hash does not precede crypt; "
++ "mac skip %u enc skip %u\n",
++ __func__, maccrd->crd_skip, enccrd->crd_skip));
++ safestats.st_skipmismatch++;
++ err = EINVAL;
++ goto errout;
++ }
++ oplen = enccrd->crd_skip + enccrd->crd_len;
++ if (maccrd->crd_skip + maccrd->crd_len != oplen) {
++ DPRINTF(("%s: hash amount %u != crypt amount %u\n",
++ __func__, maccrd->crd_skip + maccrd->crd_len,
++ oplen));
++ safestats.st_lenmismatch++;
++ err = EINVAL;
++ goto errout;
++ }
++#ifdef SAFE_DEBUG
++ if (debug) {
++ printf("mac: skip %d, len %d, inject %d\n",
++ maccrd->crd_skip, maccrd->crd_len,
++ maccrd->crd_inject);
++ printf("enc: skip %d, len %d, inject %d\n",
++ enccrd->crd_skip, enccrd->crd_len,
++ enccrd->crd_inject);
++ printf("bypass %d coffset %d oplen %d\n",
++ bypass, coffset, oplen);
++ }
++#endif
++ if (coffset & 3) { /* offset must be 32-bit aligned */
++ DPRINTF(("%s: coffset %u misaligned\n",
++ __func__, coffset));
++ safestats.st_coffmisaligned++;
++ err = EINVAL;
++ goto errout;
++ }
++ coffset >>= 2;
++ if (coffset > 255) { /* offset must be <256 dwords */
++ DPRINTF(("%s: coffset %u too big\n",
++ __func__, coffset));
++ safestats.st_cofftoobig++;
++ err = EINVAL;
++ goto errout;
++ }
++ /*
++ * Tell the hardware to copy the header to the output.
++ * The header is defined as the data from the end of
++ * the bypass to the start of data to be encrypted.
++ * Typically this is the inline IV. Note that you need
++ * to do this even if src+dst are the same; it appears
++ * that w/o this bit the crypted data is written
++ * immediately after the bypass data.
++ */
++ cmd1 |= SAFE_SA_CMD1_HDRCOPY;
++ /*
++ * Disable IP header mutable bit handling. This is
++ * needed to get correct HMAC calculations.
++ */
++ cmd1 |= SAFE_SA_CMD1_MUTABLE;
++ } else {
++ if (enccrd) {
++ bypass = enccrd->crd_skip;
++ oplen = bypass + enccrd->crd_len;
++ } else {
++ bypass = maccrd->crd_skip;
++ oplen = bypass + maccrd->crd_len;
++ }
++ coffset = 0;
++ }
++ /* XXX verify multiple of 4 when using s/g */
++ if (bypass > 96) { /* bypass offset must be <= 96 bytes */
++ DPRINTF(("%s: bypass %u too big\n", __func__, bypass));
++ safestats.st_bypasstoobig++;
++ err = EINVAL;
++ goto errout;
++ }
++
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ if (pci_map_skb(sc, &re->re_src, re->re_src_skb)) {
++ safestats.st_noload++;
++ err = ENOMEM;
++ goto errout;
++ }
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ if (pci_map_uio(sc, &re->re_src, re->re_src_io)) {
++ safestats.st_noload++;
++ err = ENOMEM;
++ goto errout;
++ }
++ }
++ nicealign = safe_dmamap_aligned(sc, &re->re_src);
++ uniform = safe_dmamap_uniform(sc, &re->re_src);
++
++ DPRINTF(("src nicealign %u uniform %u nsegs %u\n",
++ nicealign, uniform, re->re_src.nsegs));
++ if (re->re_src.nsegs > 1) {
++ re->re_desc.d_src = sc->sc_spalloc.dma_paddr +
++ ((caddr_t) sc->sc_spfree - (caddr_t) sc->sc_spring);
++ for (i = 0; i < re->re_src_nsegs; i++) {
++ /* NB: no need to check if there's space */
++ pd = sc->sc_spfree;
++ if (++(sc->sc_spfree) == sc->sc_springtop)
++ sc->sc_spfree = sc->sc_spring;
++
++ KASSERT((pd->pd_flags&3) == 0 ||
++ (pd->pd_flags&3) == SAFE_PD_DONE,
++ ("bogus source particle descriptor; flags %x",
++ pd->pd_flags));
++ pd->pd_addr = re->re_src_segs[i].ds_addr;
++ pd->pd_size = re->re_src_segs[i].ds_len;
++ pd->pd_flags = SAFE_PD_READY;
++ }
++ cmd0 |= SAFE_SA_CMD0_IGATHER;
++ } else {
++ /*
++ * No need for gather, reference the operand directly.
++ */
++ re->re_desc.d_src = re->re_src_segs[0].ds_addr;
++ }
++
++ if (enccrd == NULL && maccrd != NULL) {
++ /*
++ * Hash op; no destination needed.
++ */
++ } else {
++ if (crp->crp_flags & (CRYPTO_F_IOV|CRYPTO_F_SKBUF)) {
++ if (!nicealign) {
++ safestats.st_iovmisaligned++;
++ err = EINVAL;
++ goto errout;
++ }
++ if (uniform != 1) {
++ device_printf(sc->sc_dev, "!uniform source\n");
++ if (!uniform) {
++ /*
++ * There's no way to handle the DMA
++ * requirements with this uio. We
++ * could create a separate DMA area for
++ * the result and then copy it back,
++ * but for now we just bail and return
++ * an error. Note that uio requests
++ * > SAFE_MAX_DSIZE are handled because
++ * the DMA map and segment list for the
++ * destination wil result in a
++ * destination particle list that does
++ * the necessary scatter DMA.
++ */
++ safestats.st_iovnotuniform++;
++ err = EINVAL;
++ goto errout;
++ }
++ } else
++ re->re_dst = re->re_src;
++ } else {
++ safestats.st_badflags++;
++ err = EINVAL;
++ goto errout;
++ }
++
++ if (re->re_dst.nsegs > 1) {
++ re->re_desc.d_dst = sc->sc_dpalloc.dma_paddr +
++ ((caddr_t) sc->sc_dpfree - (caddr_t) sc->sc_dpring);
++ for (i = 0; i < re->re_dst_nsegs; i++) {
++ pd = sc->sc_dpfree;
++ KASSERT((pd->pd_flags&3) == 0 ||
++ (pd->pd_flags&3) == SAFE_PD_DONE,
++ ("bogus dest particle descriptor; flags %x",
++ pd->pd_flags));
++ if (++(sc->sc_dpfree) == sc->sc_dpringtop)
++ sc->sc_dpfree = sc->sc_dpring;
++ pd->pd_addr = re->re_dst_segs[i].ds_addr;
++ pd->pd_flags = SAFE_PD_READY;
++ }
++ cmd0 |= SAFE_SA_CMD0_OSCATTER;
++ } else {
++ /*
++ * No need for scatter, reference the operand directly.
++ */
++ re->re_desc.d_dst = re->re_dst_segs[0].ds_addr;
++ }
++ }
++
++ /*
++ * All done with setup; fillin the SA command words
++ * and the packet engine descriptor. The operation
++ * is now ready for submission to the hardware.
++ */
++ sa->sa_cmd0 = cmd0 | SAFE_SA_CMD0_IPCI | SAFE_SA_CMD0_OPCI;
++ sa->sa_cmd1 = cmd1
++ | (coffset << SAFE_SA_CMD1_OFFSET_S)
++ | SAFE_SA_CMD1_SAREV1 /* Rev 1 SA data structure */
++ | SAFE_SA_CMD1_SRPCI
++ ;
++ /*
++ * NB: the order of writes is important here. In case the
++ * chip is scanning the ring because of an outstanding request
++ * it might nab this one too. In that case we need to make
++ * sure the setup is complete before we write the length
++ * field of the descriptor as it signals the descriptor is
++ * ready for processing.
++ */
++ re->re_desc.d_csr = SAFE_PE_CSR_READY | SAFE_PE_CSR_SAPCI;
++ if (maccrd)
++ re->re_desc.d_csr |= SAFE_PE_CSR_LOADSA | SAFE_PE_CSR_HASHFINAL;
++ wmb();
++ re->re_desc.d_len = oplen
++ | SAFE_PE_LEN_READY
++ | (bypass << SAFE_PE_LEN_BYPASS_S)
++ ;
++
++ safestats.st_ipackets++;
++ safestats.st_ibytes += oplen;
++
++ if (++(sc->sc_front) == sc->sc_ringtop)
++ sc->sc_front = sc->sc_ring;
++
++ /* XXX honor batching */
++ safe_feed(sc, re);
++ spin_unlock_irqrestore(&sc->sc_ringmtx, flags);
++ return (0);
++
++errout:
++ if (re->re_src.map != re->re_dst.map)
++ pci_unmap_operand(sc, &re->re_dst);
++ if (re->re_src.map)
++ pci_unmap_operand(sc, &re->re_src);
++ spin_unlock_irqrestore(&sc->sc_ringmtx, flags);
++ if (err != ERESTART) {
++ crp->crp_etype = err;
++ crypto_done(crp);
++ } else {
++ sc->sc_needwakeup |= CRYPTO_SYMQ;
++ }
++ return (err);
++}
++
++static void
++safe_callback(struct safe_softc *sc, struct safe_ringentry *re)
++{
++ struct cryptop *crp = (struct cryptop *)re->re_crp;
++ struct cryptodesc *crd;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ safestats.st_opackets++;
++ safestats.st_obytes += re->re_dst.mapsize;
++
++ if (re->re_desc.d_csr & SAFE_PE_CSR_STATUS) {
++ device_printf(sc->sc_dev, "csr 0x%x cmd0 0x%x cmd1 0x%x\n",
++ re->re_desc.d_csr,
++ re->re_sa.sa_cmd0, re->re_sa.sa_cmd1);
++ safestats.st_peoperr++;
++ crp->crp_etype = EIO; /* something more meaningful? */
++ }
++
++ if (re->re_dst.map != NULL && re->re_dst.map != re->re_src.map)
++ pci_unmap_operand(sc, &re->re_dst);
++ pci_unmap_operand(sc, &re->re_src);
++
++ /*
++ * If result was written to a differet mbuf chain, swap
++ * it in as the return value and reclaim the original.
++ */
++ if ((crp->crp_flags & CRYPTO_F_SKBUF) && re->re_src_skb != re->re_dst_skb) {
++ device_printf(sc->sc_dev, "no CRYPTO_F_SKBUF swapping support\n");
++ /* kfree_skb(skb) */
++ /* crp->crp_buf = (caddr_t)re->re_dst_skb */
++ return;
++ }
++
++ if (re->re_flags & SAFE_QFLAGS_COPYOUTIV) {
++ /* copy out IV for future use */
++ for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
++ int i;
++ int ivsize;
++
++ if (crd->crd_alg == CRYPTO_DES_CBC ||
++ crd->crd_alg == CRYPTO_3DES_CBC) {
++ ivsize = 2*sizeof(u_int32_t);
++ } else if (crd->crd_alg == CRYPTO_AES_CBC) {
++ ivsize = 4*sizeof(u_int32_t);
++ } else
++ continue;
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ crd->crd_skip + crd->crd_len - ivsize, ivsize,
++ (caddr_t)sc->sc_sessions[re->re_sesn].ses_iv);
++ for (i = 0;
++ i < ivsize/sizeof(sc->sc_sessions[re->re_sesn].ses_iv[0]);
++ i++)
++ sc->sc_sessions[re->re_sesn].ses_iv[i] =
++ cpu_to_le32(sc->sc_sessions[re->re_sesn].ses_iv[i]);
++ break;
++ }
++ }
++
++ if (re->re_flags & SAFE_QFLAGS_COPYOUTICV) {
++ /* copy out ICV result */
++ for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
++ if (!(crd->crd_alg == CRYPTO_MD5_HMAC ||
++ crd->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd->crd_alg == CRYPTO_NULL_HMAC))
++ continue;
++ if (crd->crd_alg == CRYPTO_SHA1_HMAC) {
++ /*
++ * SHA-1 ICV's are byte-swapped; fix 'em up
++ * before copy them to their destination.
++ */
++ re->re_sastate.sa_saved_indigest[0] =
++ cpu_to_be32(re->re_sastate.sa_saved_indigest[0]);
++ re->re_sastate.sa_saved_indigest[1] =
++ cpu_to_be32(re->re_sastate.sa_saved_indigest[1]);
++ re->re_sastate.sa_saved_indigest[2] =
++ cpu_to_be32(re->re_sastate.sa_saved_indigest[2]);
++ } else {
++ re->re_sastate.sa_saved_indigest[0] =
++ cpu_to_le32(re->re_sastate.sa_saved_indigest[0]);
++ re->re_sastate.sa_saved_indigest[1] =
++ cpu_to_le32(re->re_sastate.sa_saved_indigest[1]);
++ re->re_sastate.sa_saved_indigest[2] =
++ cpu_to_le32(re->re_sastate.sa_saved_indigest[2]);
++ }
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ crd->crd_inject,
++ sc->sc_sessions[re->re_sesn].ses_mlen,
++ (caddr_t)re->re_sastate.sa_saved_indigest);
++ break;
++ }
++ }
++ crypto_done(crp);
++}
++
++
++#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG)
++#define SAFE_RNG_MAXWAIT 1000
++
++static void
++safe_rng_init(struct safe_softc *sc)
++{
++ u_int32_t w, v;
++ int i;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ WRITE_REG(sc, SAFE_RNG_CTRL, 0);
++ /* use default value according to the manual */
++ WRITE_REG(sc, SAFE_RNG_CNFG, 0x834); /* magic from SafeNet */
++ WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
++
++ /*
++ * There is a bug in rev 1.0 of the 1140 that when the RNG
++ * is brought out of reset the ready status flag does not
++ * work until the RNG has finished its internal initialization.
++ *
++ * So in order to determine the device is through its
++ * initialization we must read the data register, using the
++ * status reg in the read in case it is initialized. Then read
++ * the data register until it changes from the first read.
++ * Once it changes read the data register until it changes
++ * again. At this time the RNG is considered initialized.
++ * This could take between 750ms - 1000ms in time.
++ */
++ i = 0;
++ w = READ_REG(sc, SAFE_RNG_OUT);
++ do {
++ v = READ_REG(sc, SAFE_RNG_OUT);
++ if (v != w) {
++ w = v;
++ break;
++ }
++ DELAY(10);
++ } while (++i < SAFE_RNG_MAXWAIT);
++
++ /* Wait Until data changes again */
++ i = 0;
++ do {
++ v = READ_REG(sc, SAFE_RNG_OUT);
++ if (v != w)
++ break;
++ DELAY(10);
++ } while (++i < SAFE_RNG_MAXWAIT);
++}
++
++static __inline void
++safe_rng_disable_short_cycle(struct safe_softc *sc)
++{
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ WRITE_REG(sc, SAFE_RNG_CTRL,
++ READ_REG(sc, SAFE_RNG_CTRL) &~ SAFE_RNG_CTRL_SHORTEN);
++}
++
++static __inline void
++safe_rng_enable_short_cycle(struct safe_softc *sc)
++{
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ WRITE_REG(sc, SAFE_RNG_CTRL,
++ READ_REG(sc, SAFE_RNG_CTRL) | SAFE_RNG_CTRL_SHORTEN);
++}
++
++static __inline u_int32_t
++safe_rng_read(struct safe_softc *sc)
++{
++ int i;
++
++ i = 0;
++ while (READ_REG(sc, SAFE_RNG_STAT) != 0 && ++i < SAFE_RNG_MAXWAIT)
++ ;
++ return READ_REG(sc, SAFE_RNG_OUT);
++}
++
++static int
++safe_read_random(void *arg, u_int32_t *buf, int maxwords)
++{
++ struct safe_softc *sc = (struct safe_softc *) arg;
++ int i, rc;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ safestats.st_rng++;
++ /*
++ * Fetch the next block of data.
++ */
++ if (maxwords > safe_rngbufsize)
++ maxwords = safe_rngbufsize;
++ if (maxwords > SAFE_RNG_MAXBUFSIZ)
++ maxwords = SAFE_RNG_MAXBUFSIZ;
++retry:
++ /* read as much as we can */
++ for (rc = 0; rc < maxwords; rc++) {
++ if (READ_REG(sc, SAFE_RNG_STAT) != 0)
++ break;
++ buf[rc] = READ_REG(sc, SAFE_RNG_OUT);
++ }
++ if (rc == 0)
++ return 0;
++ /*
++ * Check the comparator alarm count and reset the h/w if
++ * it exceeds our threshold. This guards against the
++ * hardware oscillators resonating with external signals.
++ */
++ if (READ_REG(sc, SAFE_RNG_ALM_CNT) > safe_rngmaxalarm) {
++ u_int32_t freq_inc, w;
++
++ DPRINTF(("%s: alarm count %u exceeds threshold %u\n", __func__,
++ (unsigned)READ_REG(sc, SAFE_RNG_ALM_CNT), safe_rngmaxalarm));
++ safestats.st_rngalarm++;
++ safe_rng_enable_short_cycle(sc);
++ freq_inc = 18;
++ for (i = 0; i < 64; i++) {
++ w = READ_REG(sc, SAFE_RNG_CNFG);
++ freq_inc = ((w + freq_inc) & 0x3fL);
++ w = ((w & ~0x3fL) | freq_inc);
++ WRITE_REG(sc, SAFE_RNG_CNFG, w);
++
++ WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
++
++ (void) safe_rng_read(sc);
++ DELAY(25);
++
++ if (READ_REG(sc, SAFE_RNG_ALM_CNT) == 0) {
++ safe_rng_disable_short_cycle(sc);
++ goto retry;
++ }
++ freq_inc = 1;
++ }
++ safe_rng_disable_short_cycle(sc);
++ } else
++ WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
++
++ return(rc);
++}
++#endif /* defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG) */
++
++
++/*
++ * Resets the board. Values in the regesters are left as is
++ * from the reset (i.e. initial values are assigned elsewhere).
++ */
++static void
++safe_reset_board(struct safe_softc *sc)
++{
++ u_int32_t v;
++ /*
++ * Reset the device. The manual says no delay
++ * is needed between marking and clearing reset.
++ */
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ v = READ_REG(sc, SAFE_PE_DMACFG) &~
++ (SAFE_PE_DMACFG_PERESET | SAFE_PE_DMACFG_PDRRESET |
++ SAFE_PE_DMACFG_SGRESET);
++ WRITE_REG(sc, SAFE_PE_DMACFG, v
++ | SAFE_PE_DMACFG_PERESET
++ | SAFE_PE_DMACFG_PDRRESET
++ | SAFE_PE_DMACFG_SGRESET);
++ WRITE_REG(sc, SAFE_PE_DMACFG, v);
++}
++
++/*
++ * Initialize registers we need to touch only once.
++ */
++static void
++safe_init_board(struct safe_softc *sc)
++{
++ u_int32_t v, dwords;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ v = READ_REG(sc, SAFE_PE_DMACFG);
++ v &=~ ( SAFE_PE_DMACFG_PEMODE
++ | SAFE_PE_DMACFG_FSENA /* failsafe enable */
++ | SAFE_PE_DMACFG_GPRPCI /* gather ring on PCI */
++ | SAFE_PE_DMACFG_SPRPCI /* scatter ring on PCI */
++ | SAFE_PE_DMACFG_ESDESC /* endian-swap descriptors */
++ | SAFE_PE_DMACFG_ESPDESC /* endian-swap part. desc's */
++ | SAFE_PE_DMACFG_ESSA /* endian-swap SA's */
++ | SAFE_PE_DMACFG_ESPACKET /* swap the packet data */
++ );
++ v |= SAFE_PE_DMACFG_FSENA /* failsafe enable */
++ | SAFE_PE_DMACFG_GPRPCI /* gather ring on PCI */
++ | SAFE_PE_DMACFG_SPRPCI /* scatter ring on PCI */
++ | SAFE_PE_DMACFG_ESDESC /* endian-swap descriptors */
++ | SAFE_PE_DMACFG_ESPDESC /* endian-swap part. desc's */
++ | SAFE_PE_DMACFG_ESSA /* endian-swap SA's */
++#if 0
++ | SAFE_PE_DMACFG_ESPACKET /* swap the packet data */
++#endif
++ ;
++ WRITE_REG(sc, SAFE_PE_DMACFG, v);
++
++#ifdef __BIG_ENDIAN
++ /* tell the safenet that we are 4321 and not 1234 */
++ WRITE_REG(sc, SAFE_ENDIAN, 0xe4e41b1b);
++#endif
++
++ if (sc->sc_chiprev == SAFE_REV(1,0)) {
++ /*
++ * Avoid large PCI DMA transfers. Rev 1.0 has a bug where
++ * "target mode transfers" done while the chip is DMA'ing
++ * >1020 bytes cause the hardware to lockup. To avoid this
++ * we reduce the max PCI transfer size and use small source
++ * particle descriptors (<= 256 bytes).
++ */
++ WRITE_REG(sc, SAFE_DMA_CFG, 256);
++ device_printf(sc->sc_dev,
++ "Reduce max DMA size to %u words for rev %u.%u WAR\n",
++ (unsigned) ((READ_REG(sc, SAFE_DMA_CFG)>>2) & 0xff),
++ (unsigned) SAFE_REV_MAJ(sc->sc_chiprev),
++ (unsigned) SAFE_REV_MIN(sc->sc_chiprev));
++ sc->sc_max_dsize = 256;
++ } else {
++ sc->sc_max_dsize = SAFE_MAX_DSIZE;
++ }
++
++ /* NB: operands+results are overlaid */
++ WRITE_REG(sc, SAFE_PE_PDRBASE, sc->sc_ringalloc.dma_paddr);
++ WRITE_REG(sc, SAFE_PE_RDRBASE, sc->sc_ringalloc.dma_paddr);
++ /*
++ * Configure ring entry size and number of items in the ring.
++ */
++ KASSERT((sizeof(struct safe_ringentry) % sizeof(u_int32_t)) == 0,
++ ("PE ring entry not 32-bit aligned!"));
++ dwords = sizeof(struct safe_ringentry) / sizeof(u_int32_t);
++ WRITE_REG(sc, SAFE_PE_RINGCFG,
++ (dwords << SAFE_PE_RINGCFG_OFFSET_S) | SAFE_MAX_NQUEUE);
++ WRITE_REG(sc, SAFE_PE_RINGPOLL, 0); /* disable polling */
++
++ WRITE_REG(sc, SAFE_PE_GRNGBASE, sc->sc_spalloc.dma_paddr);
++ WRITE_REG(sc, SAFE_PE_SRNGBASE, sc->sc_dpalloc.dma_paddr);
++ WRITE_REG(sc, SAFE_PE_PARTSIZE,
++ (SAFE_TOTAL_DPART<<16) | SAFE_TOTAL_SPART);
++ /*
++ * NB: destination particles are fixed size. We use
++ * an mbuf cluster and require all results go to
++ * clusters or smaller.
++ */
++ WRITE_REG(sc, SAFE_PE_PARTCFG, sc->sc_max_dsize);
++
++ /* it's now safe to enable PE mode, do it */
++ WRITE_REG(sc, SAFE_PE_DMACFG, v | SAFE_PE_DMACFG_PEMODE);
++
++ /*
++ * Configure hardware to use level-triggered interrupts and
++ * to interrupt after each descriptor is processed.
++ */
++ WRITE_REG(sc, SAFE_HI_CFG, SAFE_HI_CFG_LEVEL);
++ WRITE_REG(sc, SAFE_HI_CLR, 0xffffffff);
++ WRITE_REG(sc, SAFE_HI_DESC_CNT, 1);
++ WRITE_REG(sc, SAFE_HI_MASK, SAFE_INT_PE_DDONE | SAFE_INT_PE_ERROR);
++}
++
++
++/*
++ * Clean up after a chip crash.
++ * It is assumed that the caller in splimp()
++ */
++static void
++safe_cleanchip(struct safe_softc *sc)
++{
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (sc->sc_nqchip != 0) {
++ struct safe_ringentry *re = sc->sc_back;
++
++ while (re != sc->sc_front) {
++ if (re->re_desc.d_csr != 0)
++ safe_free_entry(sc, re);
++ if (++re == sc->sc_ringtop)
++ re = sc->sc_ring;
++ }
++ sc->sc_back = re;
++ sc->sc_nqchip = 0;
++ }
++}
++
++/*
++ * free a safe_q
++ * It is assumed that the caller is within splimp().
++ */
++static int
++safe_free_entry(struct safe_softc *sc, struct safe_ringentry *re)
++{
++ struct cryptop *crp;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ /*
++ * Free header MCR
++ */
++ if ((re->re_dst_skb != NULL) && (re->re_src_skb != re->re_dst_skb))
++#ifdef NOTYET
++ m_freem(re->re_dst_m);
++#else
++ printk("%s,%d: SKB not supported\n", __FILE__, __LINE__);
++#endif
++
++ crp = (struct cryptop *)re->re_crp;
++
++ re->re_desc.d_csr = 0;
++
++ crp->crp_etype = EFAULT;
++ crypto_done(crp);
++ return(0);
++}
++
++/*
++ * Routine to reset the chip and clean up.
++ * It is assumed that the caller is in splimp()
++ */
++static void
++safe_totalreset(struct safe_softc *sc)
++{
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ safe_reset_board(sc);
++ safe_init_board(sc);
++ safe_cleanchip(sc);
++}
++
++/*
++ * Is the operand suitable aligned for direct DMA. Each
++ * segment must be aligned on a 32-bit boundary and all
++ * but the last segment must be a multiple of 4 bytes.
++ */
++static int
++safe_dmamap_aligned(struct safe_softc *sc, const struct safe_operand *op)
++{
++ int i;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ for (i = 0; i < op->nsegs; i++) {
++ if (op->segs[i].ds_addr & 3)
++ return (0);
++ if (i != (op->nsegs - 1) && (op->segs[i].ds_len & 3))
++ return (0);
++ }
++ return (1);
++}
++
++/*
++ * Is the operand suitable for direct DMA as the destination
++ * of an operation. The hardware requires that each ``particle''
++ * but the last in an operation result have the same size. We
++ * fix that size at SAFE_MAX_DSIZE bytes. This routine returns
++ * 0 if some segment is not a multiple of of this size, 1 if all
++ * segments are exactly this size, or 2 if segments are at worst
++ * a multple of this size.
++ */
++static int
++safe_dmamap_uniform(struct safe_softc *sc, const struct safe_operand *op)
++{
++ int result = 1;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (op->nsegs > 0) {
++ int i;
++
++ for (i = 0; i < op->nsegs-1; i++) {
++ if (op->segs[i].ds_len % sc->sc_max_dsize)
++ return (0);
++ if (op->segs[i].ds_len != sc->sc_max_dsize)
++ result = 2;
++ }
++ }
++ return (result);
++}
++
++static int
++safe_kprocess(device_t dev, struct cryptkop *krp, int hint)
++{
++ struct safe_softc *sc = device_get_softc(dev);
++ struct safe_pkq *q;
++ unsigned long flags;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (sc == NULL) {
++ krp->krp_status = EINVAL;
++ goto err;
++ }
++
++ if (krp->krp_op != CRK_MOD_EXP) {
++ krp->krp_status = EOPNOTSUPP;
++ goto err;
++ }
++
++ q = (struct safe_pkq *) kmalloc(sizeof(*q), GFP_KERNEL);
++ if (q == NULL) {
++ krp->krp_status = ENOMEM;
++ goto err;
++ }
++ memset(q, 0, sizeof(*q));
++ q->pkq_krp = krp;
++ INIT_LIST_HEAD(&q->pkq_list);
++
++ spin_lock_irqsave(&sc->sc_pkmtx, flags);
++ list_add_tail(&q->pkq_list, &sc->sc_pkq);
++ safe_kfeed(sc);
++ spin_unlock_irqrestore(&sc->sc_pkmtx, flags);
++ return (0);
++
++err:
++ crypto_kdone(krp);
++ return (0);
++}
++
++#define SAFE_CRK_PARAM_BASE 0
++#define SAFE_CRK_PARAM_EXP 1
++#define SAFE_CRK_PARAM_MOD 2
++
++static int
++safe_kstart(struct safe_softc *sc)
++{
++ struct cryptkop *krp = sc->sc_pkq_cur->pkq_krp;
++ int exp_bits, mod_bits, base_bits;
++ u_int32_t op, a_off, b_off, c_off, d_off;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (krp->krp_iparams < 3 || krp->krp_oparams != 1) {
++ krp->krp_status = EINVAL;
++ return (1);
++ }
++
++ base_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_BASE]);
++ if (base_bits > 2048)
++ goto too_big;
++ if (base_bits <= 0) /* 5. base not zero */
++ goto too_small;
++
++ exp_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_EXP]);
++ if (exp_bits > 2048)
++ goto too_big;
++ if (exp_bits <= 0) /* 1. exponent word length > 0 */
++ goto too_small; /* 4. exponent not zero */
++
++ mod_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_MOD]);
++ if (mod_bits > 2048)
++ goto too_big;
++ if (mod_bits <= 32) /* 2. modulus word length > 1 */
++ goto too_small; /* 8. MSW of modulus != zero */
++ if (mod_bits < exp_bits) /* 3 modulus len >= exponent len */
++ goto too_small;
++ if ((krp->krp_param[SAFE_CRK_PARAM_MOD].crp_p[0] & 1) == 0)
++ goto bad_domain; /* 6. modulus is odd */
++ if (mod_bits > krp->krp_param[krp->krp_iparams].crp_nbits)
++ goto too_small; /* make sure result will fit */
++
++ /* 7. modulus > base */
++ if (mod_bits < base_bits)
++ goto too_small;
++ if (mod_bits == base_bits) {
++ u_int8_t *basep, *modp;
++ int i;
++
++ basep = krp->krp_param[SAFE_CRK_PARAM_BASE].crp_p +
++ ((base_bits + 7) / 8) - 1;
++ modp = krp->krp_param[SAFE_CRK_PARAM_MOD].crp_p +
++ ((mod_bits + 7) / 8) - 1;
++
++ for (i = 0; i < (mod_bits + 7) / 8; i++, basep--, modp--) {
++ if (*modp < *basep)
++ goto too_small;
++ if (*modp > *basep)
++ break;
++ }
++ }
++
++ /* And on the 9th step, he rested. */
++
++ WRITE_REG(sc, SAFE_PK_A_LEN, (exp_bits + 31) / 32);
++ WRITE_REG(sc, SAFE_PK_B_LEN, (mod_bits + 31) / 32);
++ if (mod_bits > 1024) {
++ op = SAFE_PK_FUNC_EXP4;
++ a_off = 0x000;
++ b_off = 0x100;
++ c_off = 0x200;
++ d_off = 0x300;
++ } else {
++ op = SAFE_PK_FUNC_EXP16;
++ a_off = 0x000;
++ b_off = 0x080;
++ c_off = 0x100;
++ d_off = 0x180;
++ }
++ sc->sc_pk_reslen = b_off - a_off;
++ sc->sc_pk_resoff = d_off;
++
++ /* A is exponent, B is modulus, C is base, D is result */
++ safe_kload_reg(sc, a_off, b_off - a_off,
++ &krp->krp_param[SAFE_CRK_PARAM_EXP]);
++ WRITE_REG(sc, SAFE_PK_A_ADDR, a_off >> 2);
++ safe_kload_reg(sc, b_off, b_off - a_off,
++ &krp->krp_param[SAFE_CRK_PARAM_MOD]);
++ WRITE_REG(sc, SAFE_PK_B_ADDR, b_off >> 2);
++ safe_kload_reg(sc, c_off, b_off - a_off,
++ &krp->krp_param[SAFE_CRK_PARAM_BASE]);
++ WRITE_REG(sc, SAFE_PK_C_ADDR, c_off >> 2);
++ WRITE_REG(sc, SAFE_PK_D_ADDR, d_off >> 2);
++
++ WRITE_REG(sc, SAFE_PK_FUNC, op | SAFE_PK_FUNC_RUN);
++
++ return (0);
++
++too_big:
++ krp->krp_status = E2BIG;
++ return (1);
++too_small:
++ krp->krp_status = ERANGE;
++ return (1);
++bad_domain:
++ krp->krp_status = EDOM;
++ return (1);
++}
++
++static int
++safe_ksigbits(struct safe_softc *sc, struct crparam *cr)
++{
++ u_int plen = (cr->crp_nbits + 7) / 8;
++ int i, sig = plen * 8;
++ u_int8_t c, *p = cr->crp_p;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ for (i = plen - 1; i >= 0; i--) {
++ c = p[i];
++ if (c != 0) {
++ while ((c & 0x80) == 0) {
++ sig--;
++ c <<= 1;
++ }
++ break;
++ }
++ sig -= 8;
++ }
++ return (sig);
++}
++
++static void
++safe_kfeed(struct safe_softc *sc)
++{
++ struct safe_pkq *q, *tmp;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (list_empty(&sc->sc_pkq) && sc->sc_pkq_cur == NULL)
++ return;
++ if (sc->sc_pkq_cur != NULL)
++ return;
++ list_for_each_entry_safe(q, tmp, &sc->sc_pkq, pkq_list) {
++ sc->sc_pkq_cur = q;
++ list_del(&q->pkq_list);
++ if (safe_kstart(sc) != 0) {
++ crypto_kdone(q->pkq_krp);
++ kfree(q);
++ sc->sc_pkq_cur = NULL;
++ } else {
++ /* op started, start polling */
++ mod_timer(&sc->sc_pkto, jiffies + 1);
++ break;
++ }
++ }
++}
++
++static void
++safe_kpoll(unsigned long arg)
++{
++ struct safe_softc *sc = NULL;
++ struct safe_pkq *q;
++ struct crparam *res;
++ int i;
++ u_int32_t buf[64];
++ unsigned long flags;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (arg >= SAFE_MAX_CHIPS)
++ return;
++ sc = safe_chip_idx[arg];
++ if (!sc) {
++ DPRINTF(("%s() - bad callback\n", __FUNCTION__));
++ return;
++ }
++
++ spin_lock_irqsave(&sc->sc_pkmtx, flags);
++ if (sc->sc_pkq_cur == NULL)
++ goto out;
++ if (READ_REG(sc, SAFE_PK_FUNC) & SAFE_PK_FUNC_RUN) {
++ /* still running, check back later */
++ mod_timer(&sc->sc_pkto, jiffies + 1);
++ goto out;
++ }
++
++ q = sc->sc_pkq_cur;
++ res = &q->pkq_krp->krp_param[q->pkq_krp->krp_iparams];
++ bzero(buf, sizeof(buf));
++ bzero(res->crp_p, (res->crp_nbits + 7) / 8);
++ for (i = 0; i < sc->sc_pk_reslen >> 2; i++)
++ buf[i] = le32_to_cpu(READ_REG(sc, SAFE_PK_RAM_START +
++ sc->sc_pk_resoff + (i << 2)));
++ bcopy(buf, res->crp_p, (res->crp_nbits + 7) / 8);
++ /*
++ * reduce the bits that need copying if possible
++ */
++ res->crp_nbits = min(res->crp_nbits,sc->sc_pk_reslen * 8);
++ res->crp_nbits = safe_ksigbits(sc, res);
++
++ for (i = SAFE_PK_RAM_START; i < SAFE_PK_RAM_END; i += 4)
++ WRITE_REG(sc, i, 0);
++
++ crypto_kdone(q->pkq_krp);
++ kfree(q);
++ sc->sc_pkq_cur = NULL;
++
++ safe_kfeed(sc);
++out:
++ spin_unlock_irqrestore(&sc->sc_pkmtx, flags);
++}
++
++static void
++safe_kload_reg(struct safe_softc *sc, u_int32_t off, u_int32_t len,
++ struct crparam *n)
++{
++ u_int32_t buf[64], i;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ bzero(buf, sizeof(buf));
++ bcopy(n->crp_p, buf, (n->crp_nbits + 7) / 8);
++
++ for (i = 0; i < len >> 2; i++)
++ WRITE_REG(sc, SAFE_PK_RAM_START + off + (i << 2),
++ cpu_to_le32(buf[i]));
++}
++
++#ifdef SAFE_DEBUG
++static void
++safe_dump_dmastatus(struct safe_softc *sc, const char *tag)
++{
++ printf("%s: ENDIAN 0x%x SRC 0x%x DST 0x%x STAT 0x%x\n"
++ , tag
++ , READ_REG(sc, SAFE_DMA_ENDIAN)
++ , READ_REG(sc, SAFE_DMA_SRCADDR)
++ , READ_REG(sc, SAFE_DMA_DSTADDR)
++ , READ_REG(sc, SAFE_DMA_STAT)
++ );
++}
++
++static void
++safe_dump_intrstate(struct safe_softc *sc, const char *tag)
++{
++ printf("%s: HI_CFG 0x%x HI_MASK 0x%x HI_DESC_CNT 0x%x HU_STAT 0x%x HM_STAT 0x%x\n"
++ , tag
++ , READ_REG(sc, SAFE_HI_CFG)
++ , READ_REG(sc, SAFE_HI_MASK)
++ , READ_REG(sc, SAFE_HI_DESC_CNT)
++ , READ_REG(sc, SAFE_HU_STAT)
++ , READ_REG(sc, SAFE_HM_STAT)
++ );
++}
++
++static void
++safe_dump_ringstate(struct safe_softc *sc, const char *tag)
++{
++ u_int32_t estat = READ_REG(sc, SAFE_PE_ERNGSTAT);
++
++ /* NB: assume caller has lock on ring */
++ printf("%s: ERNGSTAT %x (next %u) back %lu front %lu\n",
++ tag,
++ estat, (estat >> SAFE_PE_ERNGSTAT_NEXT_S),
++ (unsigned long)(sc->sc_back - sc->sc_ring),
++ (unsigned long)(sc->sc_front - sc->sc_ring));
++}
++
++static void
++safe_dump_request(struct safe_softc *sc, const char* tag, struct safe_ringentry *re)
++{
++ int ix, nsegs;
++
++ ix = re - sc->sc_ring;
++ printf("%s: %p (%u): csr %x src %x dst %x sa %x len %x\n"
++ , tag
++ , re, ix
++ , re->re_desc.d_csr
++ , re->re_desc.d_src
++ , re->re_desc.d_dst
++ , re->re_desc.d_sa
++ , re->re_desc.d_len
++ );
++ if (re->re_src.nsegs > 1) {
++ ix = (re->re_desc.d_src - sc->sc_spalloc.dma_paddr) /
++ sizeof(struct safe_pdesc);
++ for (nsegs = re->re_src.nsegs; nsegs; nsegs--) {
++ printf(" spd[%u] %p: %p size %u flags %x"
++ , ix, &sc->sc_spring[ix]
++ , (caddr_t)(uintptr_t) sc->sc_spring[ix].pd_addr
++ , sc->sc_spring[ix].pd_size
++ , sc->sc_spring[ix].pd_flags
++ );
++ if (sc->sc_spring[ix].pd_size == 0)
++ printf(" (zero!)");
++ printf("\n");
++ if (++ix == SAFE_TOTAL_SPART)
++ ix = 0;
++ }
++ }
++ if (re->re_dst.nsegs > 1) {
++ ix = (re->re_desc.d_dst - sc->sc_dpalloc.dma_paddr) /
++ sizeof(struct safe_pdesc);
++ for (nsegs = re->re_dst.nsegs; nsegs; nsegs--) {
++ printf(" dpd[%u] %p: %p flags %x\n"
++ , ix, &sc->sc_dpring[ix]
++ , (caddr_t)(uintptr_t) sc->sc_dpring[ix].pd_addr
++ , sc->sc_dpring[ix].pd_flags
++ );
++ if (++ix == SAFE_TOTAL_DPART)
++ ix = 0;
++ }
++ }
++ printf("sa: cmd0 %08x cmd1 %08x staterec %x\n",
++ re->re_sa.sa_cmd0, re->re_sa.sa_cmd1, re->re_sa.sa_staterec);
++ printf("sa: key %x %x %x %x %x %x %x %x\n"
++ , re->re_sa.sa_key[0]
++ , re->re_sa.sa_key[1]
++ , re->re_sa.sa_key[2]
++ , re->re_sa.sa_key[3]
++ , re->re_sa.sa_key[4]
++ , re->re_sa.sa_key[5]
++ , re->re_sa.sa_key[6]
++ , re->re_sa.sa_key[7]
++ );
++ printf("sa: indigest %x %x %x %x %x\n"
++ , re->re_sa.sa_indigest[0]
++ , re->re_sa.sa_indigest[1]
++ , re->re_sa.sa_indigest[2]
++ , re->re_sa.sa_indigest[3]
++ , re->re_sa.sa_indigest[4]
++ );
++ printf("sa: outdigest %x %x %x %x %x\n"
++ , re->re_sa.sa_outdigest[0]
++ , re->re_sa.sa_outdigest[1]
++ , re->re_sa.sa_outdigest[2]
++ , re->re_sa.sa_outdigest[3]
++ , re->re_sa.sa_outdigest[4]
++ );
++ printf("sr: iv %x %x %x %x\n"
++ , re->re_sastate.sa_saved_iv[0]
++ , re->re_sastate.sa_saved_iv[1]
++ , re->re_sastate.sa_saved_iv[2]
++ , re->re_sastate.sa_saved_iv[3]
++ );
++ printf("sr: hashbc %u indigest %x %x %x %x %x\n"
++ , re->re_sastate.sa_saved_hashbc
++ , re->re_sastate.sa_saved_indigest[0]
++ , re->re_sastate.sa_saved_indigest[1]
++ , re->re_sastate.sa_saved_indigest[2]
++ , re->re_sastate.sa_saved_indigest[3]
++ , re->re_sastate.sa_saved_indigest[4]
++ );
++}
++
++static void
++safe_dump_ring(struct safe_softc *sc, const char *tag)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&sc->sc_ringmtx, flags);
++ printf("\nSafeNet Ring State:\n");
++ safe_dump_intrstate(sc, tag);
++ safe_dump_dmastatus(sc, tag);
++ safe_dump_ringstate(sc, tag);
++ if (sc->sc_nqchip) {
++ struct safe_ringentry *re = sc->sc_back;
++ do {
++ safe_dump_request(sc, tag, re);
++ if (++re == sc->sc_ringtop)
++ re = sc->sc_ring;
++ } while (re != sc->sc_front);
++ }
++ spin_unlock_irqrestore(&sc->sc_ringmtx, flags);
++}
++#endif /* SAFE_DEBUG */
++
++
++static int safe_probe(struct pci_dev *dev, const struct pci_device_id *ent)
++{
++ struct safe_softc *sc = NULL;
++ u32 mem_start, mem_len, cmd;
++ int i, rc, devinfo;
++ dma_addr_t raddr;
++ static int num_chips = 0;
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ if (pci_enable_device(dev) < 0)
++ return(-ENODEV);
++
++ if (!dev->irq) {
++ printk("safe: found device with no IRQ assigned. check BIOS settings!");
++ pci_disable_device(dev);
++ return(-ENODEV);
++ }
++
++ if (pci_set_mwi(dev)) {
++ printk("safe: pci_set_mwi failed!");
++ return(-ENODEV);
++ }
++
++ sc = (struct safe_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
++ if (!sc)
++ return(-ENOMEM);
++ memset(sc, 0, sizeof(*sc));
++
++ softc_device_init(sc, "safe", num_chips, safe_methods);
++
++ sc->sc_irq = -1;
++ sc->sc_cid = -1;
++ sc->sc_pcidev = dev;
++ if (num_chips < SAFE_MAX_CHIPS) {
++ safe_chip_idx[device_get_unit(sc->sc_dev)] = sc;
++ num_chips++;
++ }
++
++ INIT_LIST_HEAD(&sc->sc_pkq);
++ spin_lock_init(&sc->sc_pkmtx);
++
++ pci_set_drvdata(sc->sc_pcidev, sc);
++
++ /* we read its hardware registers as memory */
++ mem_start = pci_resource_start(sc->sc_pcidev, 0);
++ mem_len = pci_resource_len(sc->sc_pcidev, 0);
++
++ sc->sc_base_addr = (ocf_iomem_t) ioremap(mem_start, mem_len);
++ if (!sc->sc_base_addr) {
++ device_printf(sc->sc_dev, "failed to ioremap 0x%x-0x%x\n",
++ mem_start, mem_start + mem_len - 1);
++ goto out;
++ }
++
++ /* fix up the bus size */
++ if (pci_set_dma_mask(sc->sc_pcidev, DMA_32BIT_MASK)) {
++ device_printf(sc->sc_dev, "No usable DMA configuration, aborting.\n");
++ goto out;
++ }
++ if (pci_set_consistent_dma_mask(sc->sc_pcidev, DMA_32BIT_MASK)) {
++ device_printf(sc->sc_dev, "No usable consistent DMA configuration, aborting.\n");
++ goto out;
++ }
++
++ pci_set_master(sc->sc_pcidev);
++
++ pci_read_config_dword(sc->sc_pcidev, PCI_COMMAND, &cmd);
++
++ if (!(cmd & PCI_COMMAND_MEMORY)) {
++ device_printf(sc->sc_dev, "failed to enable memory mapping\n");
++ goto out;
++ }
++
++ if (!(cmd & PCI_COMMAND_MASTER)) {
++ device_printf(sc->sc_dev, "failed to enable bus mastering\n");
++ goto out;
++ }
++
++ rc = request_irq(dev->irq, safe_intr, IRQF_SHARED, "safe", sc);
++ if (rc) {
++ device_printf(sc->sc_dev, "failed to hook irq %d\n", sc->sc_irq);
++ goto out;
++ }
++ sc->sc_irq = dev->irq;
++
++ sc->sc_chiprev = READ_REG(sc, SAFE_DEVINFO) &
++ (SAFE_DEVINFO_REV_MAJ | SAFE_DEVINFO_REV_MIN);
++
++ /*
++ * Allocate packet engine descriptors.
++ */
++ sc->sc_ringalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev,
++ SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry),
++ &sc->sc_ringalloc.dma_paddr);
++ if (!sc->sc_ringalloc.dma_vaddr) {
++ device_printf(sc->sc_dev, "cannot allocate PE descriptor ring\n");
++ goto out;
++ }
++
++ /*
++ * Hookup the static portion of all our data structures.
++ */
++ sc->sc_ring = (struct safe_ringentry *) sc->sc_ringalloc.dma_vaddr;
++ sc->sc_ringtop = sc->sc_ring + SAFE_MAX_NQUEUE;
++ sc->sc_front = sc->sc_ring;
++ sc->sc_back = sc->sc_ring;
++ raddr = sc->sc_ringalloc.dma_paddr;
++ bzero(sc->sc_ring, SAFE_MAX_NQUEUE * sizeof(struct safe_ringentry));
++ for (i = 0; i < SAFE_MAX_NQUEUE; i++) {
++ struct safe_ringentry *re = &sc->sc_ring[i];
++
++ re->re_desc.d_sa = raddr +
++ offsetof(struct safe_ringentry, re_sa);
++ re->re_sa.sa_staterec = raddr +
++ offsetof(struct safe_ringentry, re_sastate);
++
++ raddr += sizeof (struct safe_ringentry);
++ }
++ spin_lock_init(&sc->sc_ringmtx);
++
++ /*
++ * Allocate scatter and gather particle descriptors.
++ */
++ sc->sc_spalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_SPART * sizeof (struct safe_pdesc),
++ &sc->sc_spalloc.dma_paddr);
++ if (!sc->sc_spalloc.dma_vaddr) {
++ device_printf(sc->sc_dev, "cannot allocate source particle descriptor ring\n");
++ goto out;
++ }
++ sc->sc_spring = (struct safe_pdesc *) sc->sc_spalloc.dma_vaddr;
++ sc->sc_springtop = sc->sc_spring + SAFE_TOTAL_SPART;
++ sc->sc_spfree = sc->sc_spring;
++ bzero(sc->sc_spring, SAFE_TOTAL_SPART * sizeof(struct safe_pdesc));
++
++ sc->sc_dpalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
++ &sc->sc_dpalloc.dma_paddr);
++ if (!sc->sc_dpalloc.dma_vaddr) {
++ device_printf(sc->sc_dev, "cannot allocate destination particle descriptor ring\n");
++ goto out;
++ }
++ sc->sc_dpring = (struct safe_pdesc *) sc->sc_dpalloc.dma_vaddr;
++ sc->sc_dpringtop = sc->sc_dpring + SAFE_TOTAL_DPART;
++ sc->sc_dpfree = sc->sc_dpring;
++ bzero(sc->sc_dpring, SAFE_TOTAL_DPART * sizeof(struct safe_pdesc));
++
++ sc->sc_cid = crypto_get_driverid(softc_get_device(sc), CRYPTOCAP_F_HARDWARE);
++ if (sc->sc_cid < 0) {
++ device_printf(sc->sc_dev, "could not get crypto driver id\n");
++ goto out;
++ }
++
++ printf("%s:", device_get_nameunit(sc->sc_dev));
++
++ devinfo = READ_REG(sc, SAFE_DEVINFO);
++ if (devinfo & SAFE_DEVINFO_RNG) {
++ sc->sc_flags |= SAFE_FLAGS_RNG;
++ printf(" rng");
++ }
++ if (devinfo & SAFE_DEVINFO_PKEY) {
++ printf(" key");
++ sc->sc_flags |= SAFE_FLAGS_KEY;
++ crypto_kregister(sc->sc_cid, CRK_MOD_EXP, 0);
++#if 0
++ crypto_kregister(sc->sc_cid, CRK_MOD_EXP_CRT, 0);
++#endif
++ init_timer(&sc->sc_pkto);
++ sc->sc_pkto.function = safe_kpoll;
++ sc->sc_pkto.data = (unsigned long) device_get_unit(sc->sc_dev);
++ }
++ if (devinfo & SAFE_DEVINFO_DES) {
++ printf(" des/3des");
++ crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0);
++ }
++ if (devinfo & SAFE_DEVINFO_AES) {
++ printf(" aes");
++ crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
++ }
++ if (devinfo & SAFE_DEVINFO_MD5) {
++ printf(" md5");
++ crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
++ }
++ if (devinfo & SAFE_DEVINFO_SHA1) {
++ printf(" sha1");
++ crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
++ }
++ printf(" null");
++ crypto_register(sc->sc_cid, CRYPTO_NULL_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_NULL_HMAC, 0, 0);
++ /* XXX other supported algorithms */
++ printf("\n");
++
++ safe_reset_board(sc); /* reset h/w */
++ safe_init_board(sc); /* init h/w */
++
++#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG)
++ if (sc->sc_flags & SAFE_FLAGS_RNG) {
++ safe_rng_init(sc);
++ crypto_rregister(sc->sc_cid, safe_read_random, sc);
++ }
++#endif /* SAFE_NO_RNG */
++
++ return (0);
++
++out:
++ if (sc->sc_cid >= 0)
++ crypto_unregister_all(sc->sc_cid);
++ if (sc->sc_irq != -1)
++ free_irq(sc->sc_irq, sc);
++ if (sc->sc_ringalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry),
++ sc->sc_ringalloc.dma_vaddr, sc->sc_ringalloc.dma_paddr);
++ if (sc->sc_spalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
++ sc->sc_spalloc.dma_vaddr, sc->sc_spalloc.dma_paddr);
++ if (sc->sc_dpalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
++ sc->sc_dpalloc.dma_vaddr, sc->sc_dpalloc.dma_paddr);
++ kfree(sc);
++ return(-ENODEV);
++}
++
++static void safe_remove(struct pci_dev *dev)
++{
++ struct safe_softc *sc = pci_get_drvdata(dev);
++
++ DPRINTF(("%s()\n", __FUNCTION__));
++
++ /* XXX wait/abort active ops */
++
++ WRITE_REG(sc, SAFE_HI_MASK, 0); /* disable interrupts */
++
++ del_timer_sync(&sc->sc_pkto);
++
++ crypto_unregister_all(sc->sc_cid);
++
++ safe_cleanchip(sc);
++
++ if (sc->sc_irq != -1)
++ free_irq(sc->sc_irq, sc);
++ if (sc->sc_ringalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry),
++ sc->sc_ringalloc.dma_vaddr, sc->sc_ringalloc.dma_paddr);
++ if (sc->sc_spalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
++ sc->sc_spalloc.dma_vaddr, sc->sc_spalloc.dma_paddr);
++ if (sc->sc_dpalloc.dma_vaddr)
++ pci_free_consistent(sc->sc_pcidev,
++ SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
++ sc->sc_dpalloc.dma_vaddr, sc->sc_dpalloc.dma_paddr);
++ sc->sc_irq = -1;
++ sc->sc_ringalloc.dma_vaddr = NULL;
++ sc->sc_spalloc.dma_vaddr = NULL;
++ sc->sc_dpalloc.dma_vaddr = NULL;
++}
++
++static struct pci_device_id safe_pci_tbl[] = {
++ { PCI_VENDOR_SAFENET, PCI_PRODUCT_SAFEXCEL,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
++ { },
++};
++MODULE_DEVICE_TABLE(pci, safe_pci_tbl);
++
++static struct pci_driver safe_driver = {
++ .name = "safe",
++ .id_table = safe_pci_tbl,
++ .probe = safe_probe,
++ .remove = safe_remove,
++ /* add PM stuff here one day */
++};
++
++static int __init safe_init (void)
++{
++ struct safe_softc *sc = NULL;
++ int rc;
++
++ DPRINTF(("%s(%p)\n", __FUNCTION__, safe_init));
++
++ rc = pci_register_driver(&safe_driver);
++ pci_register_driver_compat(&safe_driver, rc);
++
++ return rc;
++}
++
++static void __exit safe_exit (void)
++{
++ pci_unregister_driver(&safe_driver);
++}
++
++module_init(safe_init);
++module_exit(safe_exit);
++
++MODULE_LICENSE("BSD");
++MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>");
++MODULE_DESCRIPTION("OCF driver for safenet PCI crypto devices");
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/safereg.h linux-2.6.30/crypto/ocf/safe/safereg.h
+--- linux-2.6.30.orig/crypto/ocf/safe/safereg.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/safereg.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,421 @@
++/*-
++ * Copyright (c) 2003 Sam Leffler, Errno Consulting
++ * Copyright (c) 2003 Global Technology Associates, Inc.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ *
++ * $FreeBSD: src/sys/dev/safe/safereg.h,v 1.1 2003/07/21 21:46:07 sam Exp $
++ */
++#ifndef _SAFE_SAFEREG_H_
++#define _SAFE_SAFEREG_H_
++
++/*
++ * Register definitions for SafeNet SafeXcel-1141 crypto device.
++ * Definitions from revision 1.3 (Nov 6 2002) of the User's Manual.
++ */
++
++#define BS_BAR 0x10 /* DMA base address register */
++#define BS_TRDY_TIMEOUT 0x40 /* TRDY timeout */
++#define BS_RETRY_TIMEOUT 0x41 /* DMA retry timeout */
++
++#define PCI_VENDOR_SAFENET 0x16ae /* SafeNet, Inc. */
++
++/* SafeNet */
++#define PCI_PRODUCT_SAFEXCEL 0x1141 /* 1141 */
++
++#define SAFE_PE_CSR 0x0000 /* Packet Enginge Ctrl/Status */
++#define SAFE_PE_SRC 0x0004 /* Packet Engine Source */
++#define SAFE_PE_DST 0x0008 /* Packet Engine Destination */
++#define SAFE_PE_SA 0x000c /* Packet Engine SA */
++#define SAFE_PE_LEN 0x0010 /* Packet Engine Length */
++#define SAFE_PE_DMACFG 0x0040 /* Packet Engine DMA Configuration */
++#define SAFE_PE_DMASTAT 0x0044 /* Packet Engine DMA Status */
++#define SAFE_PE_PDRBASE 0x0048 /* Packet Engine Descriptor Ring Base */
++#define SAFE_PE_RDRBASE 0x004c /* Packet Engine Result Ring Base */
++#define SAFE_PE_RINGCFG 0x0050 /* Packet Engine Ring Configuration */
++#define SAFE_PE_RINGPOLL 0x0054 /* Packet Engine Ring Poll */
++#define SAFE_PE_IRNGSTAT 0x0058 /* Packet Engine Internal Ring Status */
++#define SAFE_PE_ERNGSTAT 0x005c /* Packet Engine External Ring Status */
++#define SAFE_PE_IOTHRESH 0x0060 /* Packet Engine I/O Threshold */
++#define SAFE_PE_GRNGBASE 0x0064 /* Packet Engine Gather Ring Base */
++#define SAFE_PE_SRNGBASE 0x0068 /* Packet Engine Scatter Ring Base */
++#define SAFE_PE_PARTSIZE 0x006c /* Packet Engine Particlar Ring Size */
++#define SAFE_PE_PARTCFG 0x0070 /* Packet Engine Particle Ring Config */
++#define SAFE_CRYPTO_CTRL 0x0080 /* Crypto Control */
++#define SAFE_DEVID 0x0084 /* Device ID */
++#define SAFE_DEVINFO 0x0088 /* Device Info */
++#define SAFE_HU_STAT 0x00a0 /* Host Unmasked Status */
++#define SAFE_HM_STAT 0x00a4 /* Host Masked Status (read-only) */
++#define SAFE_HI_CLR 0x00a4 /* Host Clear Interrupt (write-only) */
++#define SAFE_HI_MASK 0x00a8 /* Host Mask Control */
++#define SAFE_HI_CFG 0x00ac /* Interrupt Configuration */
++#define SAFE_HI_RD_DESCR 0x00b4 /* Force Descriptor Read */
++#define SAFE_HI_DESC_CNT 0x00b8 /* Host Descriptor Done Count */
++#define SAFE_DMA_ENDIAN 0x00c0 /* Master Endian Status */
++#define SAFE_DMA_SRCADDR 0x00c4 /* DMA Source Address Status */
++#define SAFE_DMA_DSTADDR 0x00c8 /* DMA Destination Address Status */
++#define SAFE_DMA_STAT 0x00cc /* DMA Current Status */
++#define SAFE_DMA_CFG 0x00d4 /* DMA Configuration/Status */
++#define SAFE_ENDIAN 0x00e0 /* Endian Configuration */
++#define SAFE_PK_A_ADDR 0x0800 /* Public Key A Address */
++#define SAFE_PK_B_ADDR 0x0804 /* Public Key B Address */
++#define SAFE_PK_C_ADDR 0x0808 /* Public Key C Address */
++#define SAFE_PK_D_ADDR 0x080c /* Public Key D Address */
++#define SAFE_PK_A_LEN 0x0810 /* Public Key A Length */
++#define SAFE_PK_B_LEN 0x0814 /* Public Key B Length */
++#define SAFE_PK_SHIFT 0x0818 /* Public Key Shift */
++#define SAFE_PK_FUNC 0x081c /* Public Key Function */
++#define SAFE_PK_RAM_START 0x1000 /* Public Key RAM start address */
++#define SAFE_PK_RAM_END 0x1fff /* Public Key RAM end address */
++
++#define SAFE_RNG_OUT 0x0100 /* RNG Output */
++#define SAFE_RNG_STAT 0x0104 /* RNG Status */
++#define SAFE_RNG_CTRL 0x0108 /* RNG Control */
++#define SAFE_RNG_A 0x010c /* RNG A */
++#define SAFE_RNG_B 0x0110 /* RNG B */
++#define SAFE_RNG_X_LO 0x0114 /* RNG X [31:0] */
++#define SAFE_RNG_X_MID 0x0118 /* RNG X [63:32] */
++#define SAFE_RNG_X_HI 0x011c /* RNG X [80:64] */
++#define SAFE_RNG_X_CNTR 0x0120 /* RNG Counter */
++#define SAFE_RNG_ALM_CNT 0x0124 /* RNG Alarm Count */
++#define SAFE_RNG_CNFG 0x0128 /* RNG Configuration */
++#define SAFE_RNG_LFSR1_LO 0x012c /* RNG LFSR1 [31:0] */
++#define SAFE_RNG_LFSR1_HI 0x0130 /* RNG LFSR1 [47:32] */
++#define SAFE_RNG_LFSR2_LO 0x0134 /* RNG LFSR1 [31:0] */
++#define SAFE_RNG_LFSR2_HI 0x0138 /* RNG LFSR1 [47:32] */
++
++#define SAFE_PE_CSR_READY 0x00000001 /* ready for processing */
++#define SAFE_PE_CSR_DONE 0x00000002 /* h/w completed processing */
++#define SAFE_PE_CSR_LOADSA 0x00000004 /* load SA digests */
++#define SAFE_PE_CSR_HASHFINAL 0x00000010 /* do hash pad & write result */
++#define SAFE_PE_CSR_SABUSID 0x000000c0 /* bus id for SA */
++#define SAFE_PE_CSR_SAPCI 0x00000040 /* PCI bus id for SA */
++#define SAFE_PE_CSR_NXTHDR 0x0000ff00 /* next hdr value for IPsec */
++#define SAFE_PE_CSR_FPAD 0x0000ff00 /* fixed pad for basic ops */
++#define SAFE_PE_CSR_STATUS 0x00ff0000 /* operation result status */
++#define SAFE_PE_CSR_AUTH_FAIL 0x00010000 /* ICV mismatch (inbound) */
++#define SAFE_PE_CSR_PAD_FAIL 0x00020000 /* pad verify fail (inbound) */
++#define SAFE_PE_CSR_SEQ_FAIL 0x00040000 /* sequence number (inbound) */
++#define SAFE_PE_CSR_XERROR 0x00080000 /* extended error follows */
++#define SAFE_PE_CSR_XECODE 0x00f00000 /* extended error code */
++#define SAFE_PE_CSR_XECODE_S 20
++#define SAFE_PE_CSR_XECODE_BADCMD 0 /* invalid command */
++#define SAFE_PE_CSR_XECODE_BADALG 1 /* invalid algorithm */
++#define SAFE_PE_CSR_XECODE_ALGDIS 2 /* algorithm disabled */
++#define SAFE_PE_CSR_XECODE_ZEROLEN 3 /* zero packet length */
++#define SAFE_PE_CSR_XECODE_DMAERR 4 /* bus DMA error */
++#define SAFE_PE_CSR_XECODE_PIPEABORT 5 /* secondary bus DMA error */
++#define SAFE_PE_CSR_XECODE_BADSPI 6 /* IPsec SPI mismatch */
++#define SAFE_PE_CSR_XECODE_TIMEOUT 10 /* failsafe timeout */
++#define SAFE_PE_CSR_PAD 0xff000000 /* ESP padding control/status */
++#define SAFE_PE_CSR_PAD_MIN 0x00000000 /* minimum IPsec padding */
++#define SAFE_PE_CSR_PAD_16 0x08000000 /* pad to 16-byte boundary */
++#define SAFE_PE_CSR_PAD_32 0x10000000 /* pad to 32-byte boundary */
++#define SAFE_PE_CSR_PAD_64 0x20000000 /* pad to 64-byte boundary */
++#define SAFE_PE_CSR_PAD_128 0x40000000 /* pad to 128-byte boundary */
++#define SAFE_PE_CSR_PAD_256 0x80000000 /* pad to 256-byte boundary */
++
++/*
++ * Check the CSR to see if the PE has returned ownership to
++ * the host. Note that before processing a descriptor this
++ * must be done followed by a check of the SAFE_PE_LEN register
++ * status bits to avoid premature processing of a descriptor
++ * on its way back to the host.
++ */
++#define SAFE_PE_CSR_IS_DONE(_csr) \
++ (((_csr) & (SAFE_PE_CSR_READY | SAFE_PE_CSR_DONE)) == SAFE_PE_CSR_DONE)
++
++#define SAFE_PE_LEN_LENGTH 0x000fffff /* total length (bytes) */
++#define SAFE_PE_LEN_READY 0x00400000 /* ready for processing */
++#define SAFE_PE_LEN_DONE 0x00800000 /* h/w completed processing */
++#define SAFE_PE_LEN_BYPASS 0xff000000 /* bypass offset (bytes) */
++#define SAFE_PE_LEN_BYPASS_S 24
++
++#define SAFE_PE_LEN_IS_DONE(_len) \
++ (((_len) & (SAFE_PE_LEN_READY | SAFE_PE_LEN_DONE)) == SAFE_PE_LEN_DONE)
++
++/* NB: these apply to HU_STAT, HM_STAT, HI_CLR, and HI_MASK */
++#define SAFE_INT_PE_CDONE 0x00000002 /* PE context done */
++#define SAFE_INT_PE_DDONE 0x00000008 /* PE descriptor done */
++#define SAFE_INT_PE_ERROR 0x00000010 /* PE error */
++#define SAFE_INT_PE_ODONE 0x00000020 /* PE operation done */
++
++#define SAFE_HI_CFG_PULSE 0x00000001 /* use pulse interrupt */
++#define SAFE_HI_CFG_LEVEL 0x00000000 /* use level interrupt */
++#define SAFE_HI_CFG_AUTOCLR 0x00000002 /* auto-clear pulse interrupt */
++
++#define SAFE_ENDIAN_PASS 0x000000e4 /* straight pass-thru */
++#define SAFE_ENDIAN_SWAB 0x0000001b /* swap bytes in 32-bit word */
++
++#define SAFE_PE_DMACFG_PERESET 0x00000001 /* reset packet engine */
++#define SAFE_PE_DMACFG_PDRRESET 0x00000002 /* reset PDR counters/ptrs */
++#define SAFE_PE_DMACFG_SGRESET 0x00000004 /* reset scatter/gather cache */
++#define SAFE_PE_DMACFG_FSENA 0x00000008 /* enable failsafe reset */
++#define SAFE_PE_DMACFG_PEMODE 0x00000100 /* packet engine mode */
++#define SAFE_PE_DMACFG_SAPREC 0x00000200 /* SA precedes packet */
++#define SAFE_PE_DMACFG_PKFOLL 0x00000400 /* packet follows descriptor */
++#define SAFE_PE_DMACFG_GPRBID 0x00003000 /* gather particle ring busid */
++#define SAFE_PE_DMACFG_GPRPCI 0x00001000 /* PCI gather particle ring */
++#define SAFE_PE_DMACFG_SPRBID 0x0000c000 /* scatter part. ring busid */
++#define SAFE_PE_DMACFG_SPRPCI 0x00004000 /* PCI scatter part. ring */
++#define SAFE_PE_DMACFG_ESDESC 0x00010000 /* endian swap descriptors */
++#define SAFE_PE_DMACFG_ESSA 0x00020000 /* endian swap SA data */
++#define SAFE_PE_DMACFG_ESPACKET 0x00040000 /* endian swap packet data */
++#define SAFE_PE_DMACFG_ESPDESC 0x00080000 /* endian swap particle desc. */
++#define SAFE_PE_DMACFG_NOPDRUP 0x00100000 /* supp. PDR ownership update */
++#define SAFE_PD_EDMACFG_PCIMODE 0x01000000 /* PCI target mode */
++
++#define SAFE_PE_DMASTAT_PEIDONE 0x00000001 /* PE core input done */
++#define SAFE_PE_DMASTAT_PEODONE 0x00000002 /* PE core output done */
++#define SAFE_PE_DMASTAT_ENCDONE 0x00000004 /* encryption done */
++#define SAFE_PE_DMASTAT_IHDONE 0x00000008 /* inner hash done */
++#define SAFE_PE_DMASTAT_OHDONE 0x00000010 /* outer hash (HMAC) done */
++#define SAFE_PE_DMASTAT_PADFLT 0x00000020 /* crypto pad fault */
++#define SAFE_PE_DMASTAT_ICVFLT 0x00000040 /* ICV fault */
++#define SAFE_PE_DMASTAT_SPIMIS 0x00000080 /* SPI mismatch */
++#define SAFE_PE_DMASTAT_CRYPTO 0x00000100 /* crypto engine timeout */
++#define SAFE_PE_DMASTAT_CQACT 0x00000200 /* command queue active */
++#define SAFE_PE_DMASTAT_IRACT 0x00000400 /* input request active */
++#define SAFE_PE_DMASTAT_ORACT 0x00000800 /* output request active */
++#define SAFE_PE_DMASTAT_PEISIZE 0x003ff000 /* PE input size:32-bit words */
++#define SAFE_PE_DMASTAT_PEOSIZE 0xffc00000 /* PE out. size:32-bit words */
++
++#define SAFE_PE_RINGCFG_SIZE 0x000003ff /* ring size (descriptors) */
++#define SAFE_PE_RINGCFG_OFFSET 0xffff0000 /* offset btw desc's (dwords) */
++#define SAFE_PE_RINGCFG_OFFSET_S 16
++
++#define SAFE_PE_RINGPOLL_POLL 0x00000fff /* polling frequency/divisor */
++#define SAFE_PE_RINGPOLL_RETRY 0x03ff0000 /* polling frequency/divisor */
++#define SAFE_PE_RINGPOLL_CONT 0x80000000 /* continuously poll */
++
++#define SAFE_PE_IRNGSTAT_CQAVAIL 0x00000001 /* command queue available */
++
++#define SAFE_PE_ERNGSTAT_NEXT 0x03ff0000 /* index of next packet desc. */
++#define SAFE_PE_ERNGSTAT_NEXT_S 16
++
++#define SAFE_PE_IOTHRESH_INPUT 0x000003ff /* input threshold (dwords) */
++#define SAFE_PE_IOTHRESH_OUTPUT 0x03ff0000 /* output threshold (dwords) */
++
++#define SAFE_PE_PARTCFG_SIZE 0x0000ffff /* scatter particle size */
++#define SAFE_PE_PARTCFG_GBURST 0x00030000 /* gather particle burst */
++#define SAFE_PE_PARTCFG_GBURST_2 0x00000000
++#define SAFE_PE_PARTCFG_GBURST_4 0x00010000
++#define SAFE_PE_PARTCFG_GBURST_8 0x00020000
++#define SAFE_PE_PARTCFG_GBURST_16 0x00030000
++#define SAFE_PE_PARTCFG_SBURST 0x000c0000 /* scatter particle burst */
++#define SAFE_PE_PARTCFG_SBURST_2 0x00000000
++#define SAFE_PE_PARTCFG_SBURST_4 0x00040000
++#define SAFE_PE_PARTCFG_SBURST_8 0x00080000
++#define SAFE_PE_PARTCFG_SBURST_16 0x000c0000
++
++#define SAFE_PE_PARTSIZE_SCAT 0xffff0000 /* scatter particle ring size */
++#define SAFE_PE_PARTSIZE_GATH 0x0000ffff /* gather particle ring size */
++
++#define SAFE_CRYPTO_CTRL_3DES 0x00000001 /* enable 3DES support */
++#define SAFE_CRYPTO_CTRL_PKEY 0x00010000 /* enable public key support */
++#define SAFE_CRYPTO_CTRL_RNG 0x00020000 /* enable RNG support */
++
++#define SAFE_DEVINFO_REV_MIN 0x0000000f /* minor rev for chip */
++#define SAFE_DEVINFO_REV_MAJ 0x000000f0 /* major rev for chip */
++#define SAFE_DEVINFO_REV_MAJ_S 4
++#define SAFE_DEVINFO_DES 0x00000100 /* DES/3DES support present */
++#define SAFE_DEVINFO_ARC4 0x00000200 /* ARC4 support present */
++#define SAFE_DEVINFO_AES 0x00000400 /* AES support present */
++#define SAFE_DEVINFO_MD5 0x00001000 /* MD5 support present */
++#define SAFE_DEVINFO_SHA1 0x00002000 /* SHA-1 support present */
++#define SAFE_DEVINFO_RIPEMD 0x00004000 /* RIPEMD support present */
++#define SAFE_DEVINFO_DEFLATE 0x00010000 /* Deflate support present */
++#define SAFE_DEVINFO_SARAM 0x00100000 /* on-chip SA RAM present */
++#define SAFE_DEVINFO_EMIBUS 0x00200000 /* EMI bus present */
++#define SAFE_DEVINFO_PKEY 0x00400000 /* public key support present */
++#define SAFE_DEVINFO_RNG 0x00800000 /* RNG present */
++
++#define SAFE_REV(_maj, _min) (((_maj) << SAFE_DEVINFO_REV_MAJ_S) | (_min))
++#define SAFE_REV_MAJ(_chiprev) \
++ (((_chiprev) & SAFE_DEVINFO_REV_MAJ) >> SAFE_DEVINFO_REV_MAJ_S)
++#define SAFE_REV_MIN(_chiprev) ((_chiprev) & SAFE_DEVINFO_REV_MIN)
++
++#define SAFE_PK_FUNC_MULT 0x00000001 /* Multiply function */
++#define SAFE_PK_FUNC_SQUARE 0x00000004 /* Square function */
++#define SAFE_PK_FUNC_ADD 0x00000010 /* Add function */
++#define SAFE_PK_FUNC_SUB 0x00000020 /* Subtract function */
++#define SAFE_PK_FUNC_LSHIFT 0x00000040 /* Left-shift function */
++#define SAFE_PK_FUNC_RSHIFT 0x00000080 /* Right-shift function */
++#define SAFE_PK_FUNC_DIV 0x00000100 /* Divide function */
++#define SAFE_PK_FUNC_CMP 0x00000400 /* Compare function */
++#define SAFE_PK_FUNC_COPY 0x00000800 /* Copy function */
++#define SAFE_PK_FUNC_EXP16 0x00002000 /* Exponentiate (4-bit ACT) */
++#define SAFE_PK_FUNC_EXP4 0x00004000 /* Exponentiate (2-bit ACT) */
++#define SAFE_PK_FUNC_RUN 0x00008000 /* start/status */
++
++#define SAFE_RNG_STAT_BUSY 0x00000001 /* busy, data not valid */
++
++#define SAFE_RNG_CTRL_PRE_LFSR 0x00000001 /* enable output pre-LFSR */
++#define SAFE_RNG_CTRL_TST_MODE 0x00000002 /* enable test mode */
++#define SAFE_RNG_CTRL_TST_RUN 0x00000004 /* start test state machine */
++#define SAFE_RNG_CTRL_ENA_RING1 0x00000008 /* test entropy oscillator #1 */
++#define SAFE_RNG_CTRL_ENA_RING2 0x00000010 /* test entropy oscillator #2 */
++#define SAFE_RNG_CTRL_DIS_ALARM 0x00000020 /* disable RNG alarm reports */
++#define SAFE_RNG_CTRL_TST_CLOCK 0x00000040 /* enable test clock */
++#define SAFE_RNG_CTRL_SHORTEN 0x00000080 /* shorten state timers */
++#define SAFE_RNG_CTRL_TST_ALARM 0x00000100 /* simulate alarm state */
++#define SAFE_RNG_CTRL_RST_LFSR 0x00000200 /* reset LFSR */
++
++/*
++ * Packet engine descriptor. Note that d_csr is a copy of the
++ * SAFE_PE_CSR register and all definitions apply, and d_len
++ * is a copy of the SAFE_PE_LEN register and all definitions apply.
++ * d_src and d_len may point directly to contiguous data or to a
++ * list of ``particle descriptors'' when using scatter/gather i/o.
++ */
++struct safe_desc {
++ u_int32_t d_csr; /* per-packet control/status */
++ u_int32_t d_src; /* source address */
++ u_int32_t d_dst; /* destination address */
++ u_int32_t d_sa; /* SA address */
++ u_int32_t d_len; /* length, bypass, status */
++};
++
++/*
++ * Scatter/Gather particle descriptor.
++ *
++ * NB: scatter descriptors do not specify a size; this is fixed
++ * by the setting of the SAFE_PE_PARTCFG register.
++ */
++struct safe_pdesc {
++ u_int32_t pd_addr; /* particle address */
++#ifdef __BIG_ENDIAN
++ u_int16_t pd_flags; /* control word */
++ u_int16_t pd_size; /* particle size (bytes) */
++#else
++ u_int16_t pd_flags; /* control word */
++ u_int16_t pd_size; /* particle size (bytes) */
++#endif
++};
++
++#define SAFE_PD_READY 0x0001 /* ready for processing */
++#define SAFE_PD_DONE 0x0002 /* h/w completed processing */
++
++/*
++ * Security Association (SA) Record (Rev 1). One of these is
++ * required for each operation processed by the packet engine.
++ */
++struct safe_sarec {
++ u_int32_t sa_cmd0;
++ u_int32_t sa_cmd1;
++ u_int32_t sa_resv0;
++ u_int32_t sa_resv1;
++ u_int32_t sa_key[8]; /* DES/3DES/AES key */
++ u_int32_t sa_indigest[5]; /* inner digest */
++ u_int32_t sa_outdigest[5]; /* outer digest */
++ u_int32_t sa_spi; /* SPI */
++ u_int32_t sa_seqnum; /* sequence number */
++ u_int32_t sa_seqmask[2]; /* sequence number mask */
++ u_int32_t sa_resv2;
++ u_int32_t sa_staterec; /* address of state record */
++ u_int32_t sa_resv3[2];
++ u_int32_t sa_samgmt0; /* SA management field 0 */
++ u_int32_t sa_samgmt1; /* SA management field 0 */
++};
++
++#define SAFE_SA_CMD0_OP 0x00000007 /* operation code */
++#define SAFE_SA_CMD0_OP_CRYPT 0x00000000 /* encrypt/decrypt (basic) */
++#define SAFE_SA_CMD0_OP_BOTH 0x00000001 /* encrypt-hash/hash-decrypto */
++#define SAFE_SA_CMD0_OP_HASH 0x00000003 /* hash (outbound-only) */
++#define SAFE_SA_CMD0_OP_ESP 0x00000000 /* ESP in/out (proto) */
++#define SAFE_SA_CMD0_OP_AH 0x00000001 /* AH in/out (proto) */
++#define SAFE_SA_CMD0_INBOUND 0x00000008 /* inbound operation */
++#define SAFE_SA_CMD0_OUTBOUND 0x00000000 /* outbound operation */
++#define SAFE_SA_CMD0_GROUP 0x00000030 /* operation group */
++#define SAFE_SA_CMD0_BASIC 0x00000000 /* basic operation */
++#define SAFE_SA_CMD0_PROTO 0x00000010 /* protocol/packet operation */
++#define SAFE_SA_CMD0_BUNDLE 0x00000020 /* bundled operation (resvd) */
++#define SAFE_SA_CMD0_PAD 0x000000c0 /* crypto pad method */
++#define SAFE_SA_CMD0_PAD_IPSEC 0x00000000 /* IPsec padding */
++#define SAFE_SA_CMD0_PAD_PKCS7 0x00000040 /* PKCS#7 padding */
++#define SAFE_SA_CMD0_PAD_CONS 0x00000080 /* constant padding */
++#define SAFE_SA_CMD0_PAD_ZERO 0x000000c0 /* zero padding */
++#define SAFE_SA_CMD0_CRYPT_ALG 0x00000f00 /* symmetric crypto algorithm */
++#define SAFE_SA_CMD0_DES 0x00000000 /* DES crypto algorithm */
++#define SAFE_SA_CMD0_3DES 0x00000100 /* 3DES crypto algorithm */
++#define SAFE_SA_CMD0_AES 0x00000300 /* AES crypto algorithm */
++#define SAFE_SA_CMD0_CRYPT_NULL 0x00000f00 /* null crypto algorithm */
++#define SAFE_SA_CMD0_HASH_ALG 0x0000f000 /* hash algorithm */
++#define SAFE_SA_CMD0_MD5 0x00000000 /* MD5 hash algorithm */
++#define SAFE_SA_CMD0_SHA1 0x00001000 /* SHA-1 hash algorithm */
++#define SAFE_SA_CMD0_HASH_NULL 0x0000f000 /* null hash algorithm */
++#define SAFE_SA_CMD0_HDR_PROC 0x00080000 /* header processing */
++#define SAFE_SA_CMD0_IBUSID 0x00300000 /* input bus id */
++#define SAFE_SA_CMD0_IPCI 0x00100000 /* PCI input bus id */
++#define SAFE_SA_CMD0_OBUSID 0x00c00000 /* output bus id */
++#define SAFE_SA_CMD0_OPCI 0x00400000 /* PCI output bus id */
++#define SAFE_SA_CMD0_IVLD 0x03000000 /* IV loading */
++#define SAFE_SA_CMD0_IVLD_NONE 0x00000000 /* IV no load (reuse) */
++#define SAFE_SA_CMD0_IVLD_IBUF 0x01000000 /* IV load from input buffer */
++#define SAFE_SA_CMD0_IVLD_STATE 0x02000000 /* IV load from state */
++#define SAFE_SA_CMD0_HSLD 0x0c000000 /* hash state loading */
++#define SAFE_SA_CMD0_HSLD_SA 0x00000000 /* hash state load from SA */
++#define SAFE_SA_CMD0_HSLD_STATE 0x08000000 /* hash state load from state */
++#define SAFE_SA_CMD0_HSLD_NONE 0x0c000000 /* hash state no load */
++#define SAFE_SA_CMD0_SAVEIV 0x10000000 /* save IV */
++#define SAFE_SA_CMD0_SAVEHASH 0x20000000 /* save hash state */
++#define SAFE_SA_CMD0_IGATHER 0x40000000 /* input gather */
++#define SAFE_SA_CMD0_OSCATTER 0x80000000 /* output scatter */
++
++#define SAFE_SA_CMD1_HDRCOPY 0x00000002 /* copy header to output */
++#define SAFE_SA_CMD1_PAYCOPY 0x00000004 /* copy payload to output */
++#define SAFE_SA_CMD1_PADCOPY 0x00000008 /* copy pad to output */
++#define SAFE_SA_CMD1_IPV4 0x00000000 /* IPv4 protocol */
++#define SAFE_SA_CMD1_IPV6 0x00000010 /* IPv6 protocol */
++#define SAFE_SA_CMD1_MUTABLE 0x00000020 /* mutable bit processing */
++#define SAFE_SA_CMD1_SRBUSID 0x000000c0 /* state record bus id */
++#define SAFE_SA_CMD1_SRPCI 0x00000040 /* state record from PCI */
++#define SAFE_SA_CMD1_CRMODE 0x00000300 /* crypto mode */
++#define SAFE_SA_CMD1_ECB 0x00000000 /* ECB crypto mode */
++#define SAFE_SA_CMD1_CBC 0x00000100 /* CBC crypto mode */
++#define SAFE_SA_CMD1_OFB 0x00000200 /* OFB crypto mode */
++#define SAFE_SA_CMD1_CFB 0x00000300 /* CFB crypto mode */
++#define SAFE_SA_CMD1_CRFEEDBACK 0x00000c00 /* crypto feedback mode */
++#define SAFE_SA_CMD1_64BIT 0x00000000 /* 64-bit crypto feedback */
++#define SAFE_SA_CMD1_8BIT 0x00000400 /* 8-bit crypto feedback */
++#define SAFE_SA_CMD1_1BIT 0x00000800 /* 1-bit crypto feedback */
++#define SAFE_SA_CMD1_128BIT 0x00000c00 /* 128-bit crypto feedback */
++#define SAFE_SA_CMD1_OPTIONS 0x00001000 /* HMAC/options mutable bit */
++#define SAFE_SA_CMD1_HMAC SAFE_SA_CMD1_OPTIONS
++#define SAFE_SA_CMD1_SAREV1 0x00008000 /* SA Revision 1 */
++#define SAFE_SA_CMD1_OFFSET 0x00ff0000 /* hash/crypto offset(dwords) */
++#define SAFE_SA_CMD1_OFFSET_S 16
++#define SAFE_SA_CMD1_AESKEYLEN 0x0f000000 /* AES key length */
++#define SAFE_SA_CMD1_AES128 0x02000000 /* 128-bit AES key */
++#define SAFE_SA_CMD1_AES192 0x03000000 /* 192-bit AES key */
++#define SAFE_SA_CMD1_AES256 0x04000000 /* 256-bit AES key */
++
++/*
++ * Security Associate State Record (Rev 1).
++ */
++struct safe_sastate {
++ u_int32_t sa_saved_iv[4]; /* saved IV (DES/3DES/AES) */
++ u_int32_t sa_saved_hashbc; /* saved hash byte count */
++ u_int32_t sa_saved_indigest[5]; /* saved inner digest */
++};
++#endif /* _SAFE_SAFEREG_H_ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/safevar.h linux-2.6.30/crypto/ocf/safe/safevar.h
+--- linux-2.6.30.orig/crypto/ocf/safe/safevar.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/safevar.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,230 @@
++/*-
++ * The linux port of this code done by David McCullough
++ * Copyright (C) 2004-2007 David McCullough <david_mccullough@securecomputing.com>
++ * The license and original author are listed below.
++ *
++ * Copyright (c) 2003 Sam Leffler, Errno Consulting
++ * Copyright (c) 2003 Global Technology Associates, Inc.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ *
++ * $FreeBSD: src/sys/dev/safe/safevar.h,v 1.2 2006/05/17 18:34:26 pjd Exp $
++ */
++#ifndef _SAFE_SAFEVAR_H_
++#define _SAFE_SAFEVAR_H_
++
++/* Maximum queue length */
++#ifndef SAFE_MAX_NQUEUE
++#define SAFE_MAX_NQUEUE 60
++#endif
++
++#define SAFE_MAX_PART 64 /* Maximum scatter/gather depth */
++#define SAFE_DMA_BOUNDARY 0 /* No boundary for source DMA ops */
++#define SAFE_MAX_DSIZE 2048 /* MCLBYTES Fixed scatter particle size */
++#define SAFE_MAX_SSIZE 0x0ffff /* Maximum gather particle size */
++#define SAFE_MAX_DMA 0xfffff /* Maximum PE operand size (20 bits) */
++/* total src+dst particle descriptors */
++#define SAFE_TOTAL_DPART (SAFE_MAX_NQUEUE * SAFE_MAX_PART)
++#define SAFE_TOTAL_SPART (SAFE_MAX_NQUEUE * SAFE_MAX_PART)
++
++#define SAFE_RNG_MAXBUFSIZ 128 /* 32-bit words */
++
++#define SAFE_CARD(sid) (((sid) & 0xf0000000) >> 28)
++#define SAFE_SESSION(sid) ( (sid) & 0x0fffffff)
++#define SAFE_SID(crd, sesn) (((crd) << 28) | ((sesn) & 0x0fffffff))
++
++#define SAFE_DEF_RTY 0xff /* PCI Retry Timeout */
++#define SAFE_DEF_TOUT 0xff /* PCI TRDY Timeout */
++#define SAFE_DEF_CACHELINE 0x01 /* Cache Line setting */
++
++#ifdef __KERNEL__
++/*
++ * State associated with the allocation of each chunk
++ * of memory setup for DMA.
++ */
++struct safe_dma_alloc {
++ dma_addr_t dma_paddr;
++ void *dma_vaddr;
++};
++
++/*
++ * Cryptographic operand state. One of these exists for each
++ * source and destination operand passed in from the crypto
++ * subsystem. When possible source and destination operands
++ * refer to the same memory. More often they are distinct.
++ * We track the virtual address of each operand as well as
++ * where each is mapped for DMA.
++ */
++struct safe_operand {
++ union {
++ struct sk_buff *skb;
++ struct uio *io;
++ } u;
++ void *map;
++ int mapsize; /* total number of bytes in segs */
++ struct {
++ dma_addr_t ds_addr;
++ int ds_len;
++ int ds_tlen;
++ } segs[SAFE_MAX_PART];
++ int nsegs;
++};
++
++/*
++ * Packet engine ring entry and cryptographic operation state.
++ * The packet engine requires a ring of descriptors that contain
++ * pointers to various cryptographic state. However the ring
++ * configuration register allows you to specify an arbitrary size
++ * for ring entries. We use this feature to collect most of the
++ * state for each cryptographic request into one spot. Other than
++ * ring entries only the ``particle descriptors'' (scatter/gather
++ * lists) and the actual operand data are kept separate. The
++ * particle descriptors must also be organized in rings. The
++ * operand data can be located aribtrarily (modulo alignment constraints).
++ *
++ * Note that the descriptor ring is mapped onto the PCI bus so
++ * the hardware can DMA data. This means the entire ring must be
++ * contiguous.
++ */
++struct safe_ringentry {
++ struct safe_desc re_desc; /* command descriptor */
++ struct safe_sarec re_sa; /* SA record */
++ struct safe_sastate re_sastate; /* SA state record */
++
++ struct cryptop *re_crp; /* crypto operation */
++
++ struct safe_operand re_src; /* source operand */
++ struct safe_operand re_dst; /* destination operand */
++
++ int re_sesn; /* crypto session ID */
++ int re_flags;
++#define SAFE_QFLAGS_COPYOUTIV 0x1 /* copy back on completion */
++#define SAFE_QFLAGS_COPYOUTICV 0x2 /* copy back on completion */
++};
++
++#define re_src_skb re_src.u.skb
++#define re_src_io re_src.u.io
++#define re_src_map re_src.map
++#define re_src_nsegs re_src.nsegs
++#define re_src_segs re_src.segs
++#define re_src_mapsize re_src.mapsize
++
++#define re_dst_skb re_dst.u.skb
++#define re_dst_io re_dst.u.io
++#define re_dst_map re_dst.map
++#define re_dst_nsegs re_dst.nsegs
++#define re_dst_segs re_dst.segs
++#define re_dst_mapsize re_dst.mapsize
++
++struct rndstate_test;
++
++struct safe_session {
++ u_int32_t ses_used;
++ u_int32_t ses_klen; /* key length in bits */
++ u_int32_t ses_key[8]; /* DES/3DES/AES key */
++ u_int32_t ses_mlen; /* hmac length in bytes */
++ u_int32_t ses_hminner[5]; /* hmac inner state */
++ u_int32_t ses_hmouter[5]; /* hmac outer state */
++ u_int32_t ses_iv[4]; /* DES/3DES/AES iv */
++};
++
++struct safe_pkq {
++ struct list_head pkq_list;
++ struct cryptkop *pkq_krp;
++};
++
++struct safe_softc {
++ softc_device_decl sc_dev;
++ u32 sc_irq;
++
++ struct pci_dev *sc_pcidev;
++ ocf_iomem_t sc_base_addr;
++
++ u_int sc_chiprev; /* major/minor chip revision */
++ int sc_flags; /* device specific flags */
++#define SAFE_FLAGS_KEY 0x01 /* has key accelerator */
++#define SAFE_FLAGS_RNG 0x02 /* hardware rng */
++ int sc_suspended;
++ int sc_needwakeup; /* notify crypto layer */
++ int32_t sc_cid; /* crypto tag */
++
++ struct safe_dma_alloc sc_ringalloc; /* PE ring allocation state */
++ struct safe_ringentry *sc_ring; /* PE ring */
++ struct safe_ringentry *sc_ringtop; /* PE ring top */
++ struct safe_ringentry *sc_front; /* next free entry */
++ struct safe_ringentry *sc_back; /* next pending entry */
++ int sc_nqchip; /* # passed to chip */
++ spinlock_t sc_ringmtx; /* PE ring lock */
++ struct safe_pdesc *sc_spring; /* src particle ring */
++ struct safe_pdesc *sc_springtop; /* src particle ring top */
++ struct safe_pdesc *sc_spfree; /* next free src particle */
++ struct safe_dma_alloc sc_spalloc; /* src particle ring state */
++ struct safe_pdesc *sc_dpring; /* dest particle ring */
++ struct safe_pdesc *sc_dpringtop; /* dest particle ring top */
++ struct safe_pdesc *sc_dpfree; /* next free dest particle */
++ struct safe_dma_alloc sc_dpalloc; /* dst particle ring state */
++ int sc_nsessions; /* # of sessions */
++ struct safe_session *sc_sessions; /* sessions */
++
++ struct timer_list sc_pkto; /* PK polling */
++ spinlock_t sc_pkmtx; /* PK lock */
++ struct list_head sc_pkq; /* queue of PK requests */
++ struct safe_pkq *sc_pkq_cur; /* current processing request */
++ u_int32_t sc_pk_reslen, sc_pk_resoff;
++
++ int sc_max_dsize; /* maximum safe DMA size */
++};
++#endif /* __KERNEL__ */
++
++struct safe_stats {
++ u_int64_t st_ibytes;
++ u_int64_t st_obytes;
++ u_int32_t st_ipackets;
++ u_int32_t st_opackets;
++ u_int32_t st_invalid; /* invalid argument */
++ u_int32_t st_badsession; /* invalid session id */
++ u_int32_t st_badflags; /* flags indicate !(mbuf | uio) */
++ u_int32_t st_nodesc; /* op submitted w/o descriptors */
++ u_int32_t st_badalg; /* unsupported algorithm */
++ u_int32_t st_ringfull; /* PE descriptor ring full */
++ u_int32_t st_peoperr; /* PE marked error */
++ u_int32_t st_dmaerr; /* PE DMA error */
++ u_int32_t st_bypasstoobig; /* bypass > 96 bytes */
++ u_int32_t st_skipmismatch; /* enc part begins before auth part */
++ u_int32_t st_lenmismatch; /* enc length different auth length */
++ u_int32_t st_coffmisaligned; /* crypto offset not 32-bit aligned */
++ u_int32_t st_cofftoobig; /* crypto offset > 255 words */
++ u_int32_t st_iovmisaligned; /* iov op not aligned */
++ u_int32_t st_iovnotuniform; /* iov op not suitable */
++ u_int32_t st_unaligned; /* unaligned src caused copy */
++ u_int32_t st_notuniform; /* non-uniform src caused copy */
++ u_int32_t st_nomap; /* bus_dmamap_create failed */
++ u_int32_t st_noload; /* bus_dmamap_load_* failed */
++ u_int32_t st_nombuf; /* MGET* failed */
++ u_int32_t st_nomcl; /* MCLGET* failed */
++ u_int32_t st_maxqchip; /* max mcr1 ops out for processing */
++ u_int32_t st_rng; /* RNG requests */
++ u_int32_t st_rngalarm; /* RNG alarm requests */
++ u_int32_t st_noicvcopy; /* ICV data copies suppressed */
++};
++#endif /* _SAFE_SAFEVAR_H_ */
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/sha1.c linux-2.6.30/crypto/ocf/safe/sha1.c
+--- linux-2.6.30.orig/crypto/ocf/safe/sha1.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/sha1.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,279 @@
++/* $KAME: sha1.c,v 1.5 2000/11/08 06:13:08 itojun Exp $ */
++/*
++ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the project nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ */
++
++/*
++ * FIPS pub 180-1: Secure Hash Algorithm (SHA-1)
++ * based on: http://csrc.nist.gov/fips/fip180-1.txt
++ * implemented by Jun-ichiro itojun Itoh <itojun@itojun.org>
++ */
++
++#if 0
++#include <sys/cdefs.h>
++__FBSDID("$FreeBSD: src/sys/crypto/sha1.c,v 1.9 2003/06/10 21:36:57 obrien Exp $");
++
++#include <sys/types.h>
++#include <sys/cdefs.h>
++#include <sys/time.h>
++#include <sys/systm.h>
++
++#include <crypto/sha1.h>
++#endif
++
++/* sanity check */
++#if BYTE_ORDER != BIG_ENDIAN
++# if BYTE_ORDER != LITTLE_ENDIAN
++# define unsupported 1
++# endif
++#endif
++
++#ifndef unsupported
++
++/* constant table */
++static u_int32_t _K[] = { 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 };
++#define K(t) _K[(t) / 20]
++
++#define F0(b, c, d) (((b) & (c)) | ((~(b)) & (d)))
++#define F1(b, c, d) (((b) ^ (c)) ^ (d))
++#define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d)))
++#define F3(b, c, d) (((b) ^ (c)) ^ (d))
++
++#define S(n, x) (((x) << (n)) | ((x) >> (32 - n)))
++
++#undef H
++#define H(n) (ctxt->h.b32[(n)])
++#define COUNT (ctxt->count)
++#define BCOUNT (ctxt->c.b64[0] / 8)
++#define W(n) (ctxt->m.b32[(n)])
++
++#define PUTBYTE(x) { \
++ ctxt->m.b8[(COUNT % 64)] = (x); \
++ COUNT++; \
++ COUNT %= 64; \
++ ctxt->c.b64[0] += 8; \
++ if (COUNT % 64 == 0) \
++ sha1_step(ctxt); \
++ }
++
++#define PUTPAD(x) { \
++ ctxt->m.b8[(COUNT % 64)] = (x); \
++ COUNT++; \
++ COUNT %= 64; \
++ if (COUNT % 64 == 0) \
++ sha1_step(ctxt); \
++ }
++
++static void sha1_step(struct sha1_ctxt *);
++
++static void
++sha1_step(ctxt)
++ struct sha1_ctxt *ctxt;
++{
++ u_int32_t a, b, c, d, e;
++ size_t t, s;
++ u_int32_t tmp;
++
++#if BYTE_ORDER == LITTLE_ENDIAN
++ struct sha1_ctxt tctxt;
++ bcopy(&ctxt->m.b8[0], &tctxt.m.b8[0], 64);
++ ctxt->m.b8[0] = tctxt.m.b8[3]; ctxt->m.b8[1] = tctxt.m.b8[2];
++ ctxt->m.b8[2] = tctxt.m.b8[1]; ctxt->m.b8[3] = tctxt.m.b8[0];
++ ctxt->m.b8[4] = tctxt.m.b8[7]; ctxt->m.b8[5] = tctxt.m.b8[6];
++ ctxt->m.b8[6] = tctxt.m.b8[5]; ctxt->m.b8[7] = tctxt.m.b8[4];
++ ctxt->m.b8[8] = tctxt.m.b8[11]; ctxt->m.b8[9] = tctxt.m.b8[10];
++ ctxt->m.b8[10] = tctxt.m.b8[9]; ctxt->m.b8[11] = tctxt.m.b8[8];
++ ctxt->m.b8[12] = tctxt.m.b8[15]; ctxt->m.b8[13] = tctxt.m.b8[14];
++ ctxt->m.b8[14] = tctxt.m.b8[13]; ctxt->m.b8[15] = tctxt.m.b8[12];
++ ctxt->m.b8[16] = tctxt.m.b8[19]; ctxt->m.b8[17] = tctxt.m.b8[18];
++ ctxt->m.b8[18] = tctxt.m.b8[17]; ctxt->m.b8[19] = tctxt.m.b8[16];
++ ctxt->m.b8[20] = tctxt.m.b8[23]; ctxt->m.b8[21] = tctxt.m.b8[22];
++ ctxt->m.b8[22] = tctxt.m.b8[21]; ctxt->m.b8[23] = tctxt.m.b8[20];
++ ctxt->m.b8[24] = tctxt.m.b8[27]; ctxt->m.b8[25] = tctxt.m.b8[26];
++ ctxt->m.b8[26] = tctxt.m.b8[25]; ctxt->m.b8[27] = tctxt.m.b8[24];
++ ctxt->m.b8[28] = tctxt.m.b8[31]; ctxt->m.b8[29] = tctxt.m.b8[30];
++ ctxt->m.b8[30] = tctxt.m.b8[29]; ctxt->m.b8[31] = tctxt.m.b8[28];
++ ctxt->m.b8[32] = tctxt.m.b8[35]; ctxt->m.b8[33] = tctxt.m.b8[34];
++ ctxt->m.b8[34] = tctxt.m.b8[33]; ctxt->m.b8[35] = tctxt.m.b8[32];
++ ctxt->m.b8[36] = tctxt.m.b8[39]; ctxt->m.b8[37] = tctxt.m.b8[38];
++ ctxt->m.b8[38] = tctxt.m.b8[37]; ctxt->m.b8[39] = tctxt.m.b8[36];
++ ctxt->m.b8[40] = tctxt.m.b8[43]; ctxt->m.b8[41] = tctxt.m.b8[42];
++ ctxt->m.b8[42] = tctxt.m.b8[41]; ctxt->m.b8[43] = tctxt.m.b8[40];
++ ctxt->m.b8[44] = tctxt.m.b8[47]; ctxt->m.b8[45] = tctxt.m.b8[46];
++ ctxt->m.b8[46] = tctxt.m.b8[45]; ctxt->m.b8[47] = tctxt.m.b8[44];
++ ctxt->m.b8[48] = tctxt.m.b8[51]; ctxt->m.b8[49] = tctxt.m.b8[50];
++ ctxt->m.b8[50] = tctxt.m.b8[49]; ctxt->m.b8[51] = tctxt.m.b8[48];
++ ctxt->m.b8[52] = tctxt.m.b8[55]; ctxt->m.b8[53] = tctxt.m.b8[54];
++ ctxt->m.b8[54] = tctxt.m.b8[53]; ctxt->m.b8[55] = tctxt.m.b8[52];
++ ctxt->m.b8[56] = tctxt.m.b8[59]; ctxt->m.b8[57] = tctxt.m.b8[58];
++ ctxt->m.b8[58] = tctxt.m.b8[57]; ctxt->m.b8[59] = tctxt.m.b8[56];
++ ctxt->m.b8[60] = tctxt.m.b8[63]; ctxt->m.b8[61] = tctxt.m.b8[62];
++ ctxt->m.b8[62] = tctxt.m.b8[61]; ctxt->m.b8[63] = tctxt.m.b8[60];
++#endif
++
++ a = H(0); b = H(1); c = H(2); d = H(3); e = H(4);
++
++ for (t = 0; t < 20; t++) {
++ s = t & 0x0f;
++ if (t >= 16) {
++ W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
++ }
++ tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t);
++ e = d; d = c; c = S(30, b); b = a; a = tmp;
++ }
++ for (t = 20; t < 40; t++) {
++ s = t & 0x0f;
++ W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
++ tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t);
++ e = d; d = c; c = S(30, b); b = a; a = tmp;
++ }
++ for (t = 40; t < 60; t++) {
++ s = t & 0x0f;
++ W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
++ tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t);
++ e = d; d = c; c = S(30, b); b = a; a = tmp;
++ }
++ for (t = 60; t < 80; t++) {
++ s = t & 0x0f;
++ W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
++ tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t);
++ e = d; d = c; c = S(30, b); b = a; a = tmp;
++ }
++
++ H(0) = H(0) + a;
++ H(1) = H(1) + b;
++ H(2) = H(2) + c;
++ H(3) = H(3) + d;
++ H(4) = H(4) + e;
++
++ bzero(&ctxt->m.b8[0], 64);
++}
++
++/*------------------------------------------------------------*/
++
++void
++sha1_init(ctxt)
++ struct sha1_ctxt *ctxt;
++{
++ bzero(ctxt, sizeof(struct sha1_ctxt));
++ H(0) = 0x67452301;
++ H(1) = 0xefcdab89;
++ H(2) = 0x98badcfe;
++ H(3) = 0x10325476;
++ H(4) = 0xc3d2e1f0;
++}
++
++void
++sha1_pad(ctxt)
++ struct sha1_ctxt *ctxt;
++{
++ size_t padlen; /*pad length in bytes*/
++ size_t padstart;
++
++ PUTPAD(0x80);
++
++ padstart = COUNT % 64;
++ padlen = 64 - padstart;
++ if (padlen < 8) {
++ bzero(&ctxt->m.b8[padstart], padlen);
++ COUNT += padlen;
++ COUNT %= 64;
++ sha1_step(ctxt);
++ padstart = COUNT % 64; /* should be 0 */
++ padlen = 64 - padstart; /* should be 64 */
++ }
++ bzero(&ctxt->m.b8[padstart], padlen - 8);
++ COUNT += (padlen - 8);
++ COUNT %= 64;
++#if BYTE_ORDER == BIG_ENDIAN
++ PUTPAD(ctxt->c.b8[0]); PUTPAD(ctxt->c.b8[1]);
++ PUTPAD(ctxt->c.b8[2]); PUTPAD(ctxt->c.b8[3]);
++ PUTPAD(ctxt->c.b8[4]); PUTPAD(ctxt->c.b8[5]);
++ PUTPAD(ctxt->c.b8[6]); PUTPAD(ctxt->c.b8[7]);
++#else
++ PUTPAD(ctxt->c.b8[7]); PUTPAD(ctxt->c.b8[6]);
++ PUTPAD(ctxt->c.b8[5]); PUTPAD(ctxt->c.b8[4]);
++ PUTPAD(ctxt->c.b8[3]); PUTPAD(ctxt->c.b8[2]);
++ PUTPAD(ctxt->c.b8[1]); PUTPAD(ctxt->c.b8[0]);
++#endif
++}
++
++void
++sha1_loop(ctxt, input, len)
++ struct sha1_ctxt *ctxt;
++ const u_int8_t *input;
++ size_t len;
++{
++ size_t gaplen;
++ size_t gapstart;
++ size_t off;
++ size_t copysiz;
++
++ off = 0;
++
++ while (off < len) {
++ gapstart = COUNT % 64;
++ gaplen = 64 - gapstart;
++
++ copysiz = (gaplen < len - off) ? gaplen : len - off;
++ bcopy(&input[off], &ctxt->m.b8[gapstart], copysiz);
++ COUNT += copysiz;
++ COUNT %= 64;
++ ctxt->c.b64[0] += copysiz * 8;
++ if (COUNT % 64 == 0)
++ sha1_step(ctxt);
++ off += copysiz;
++ }
++}
++
++void
++sha1_result(ctxt, digest0)
++ struct sha1_ctxt *ctxt;
++ caddr_t digest0;
++{
++ u_int8_t *digest;
++
++ digest = (u_int8_t *)digest0;
++ sha1_pad(ctxt);
++#if BYTE_ORDER == BIG_ENDIAN
++ bcopy(&ctxt->h.b8[0], digest, 20);
++#else
++ digest[0] = ctxt->h.b8[3]; digest[1] = ctxt->h.b8[2];
++ digest[2] = ctxt->h.b8[1]; digest[3] = ctxt->h.b8[0];
++ digest[4] = ctxt->h.b8[7]; digest[5] = ctxt->h.b8[6];
++ digest[6] = ctxt->h.b8[5]; digest[7] = ctxt->h.b8[4];
++ digest[8] = ctxt->h.b8[11]; digest[9] = ctxt->h.b8[10];
++ digest[10] = ctxt->h.b8[9]; digest[11] = ctxt->h.b8[8];
++ digest[12] = ctxt->h.b8[15]; digest[13] = ctxt->h.b8[14];
++ digest[14] = ctxt->h.b8[13]; digest[15] = ctxt->h.b8[12];
++ digest[16] = ctxt->h.b8[19]; digest[17] = ctxt->h.b8[18];
++ digest[18] = ctxt->h.b8[17]; digest[19] = ctxt->h.b8[16];
++#endif
++}
++
++#endif /*unsupported*/
+diff -Nur linux-2.6.30.orig/crypto/ocf/safe/sha1.h linux-2.6.30/crypto/ocf/safe/sha1.h
+--- linux-2.6.30.orig/crypto/ocf/safe/sha1.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/safe/sha1.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,72 @@
++/* $FreeBSD: src/sys/crypto/sha1.h,v 1.8 2002/03/20 05:13:50 alfred Exp $ */
++/* $KAME: sha1.h,v 1.5 2000/03/27 04:36:23 sumikawa Exp $ */
++
++/*
++ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the project nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ */
++/*
++ * FIPS pub 180-1: Secure Hash Algorithm (SHA-1)
++ * based on: http://csrc.nist.gov/fips/fip180-1.txt
++ * implemented by Jun-ichiro itojun Itoh <itojun@itojun.org>
++ */
++
++#ifndef _NETINET6_SHA1_H_
++#define _NETINET6_SHA1_H_
++
++struct sha1_ctxt {
++ union {
++ u_int8_t b8[20];
++ u_int32_t b32[5];
++ } h;
++ union {
++ u_int8_t b8[8];
++ u_int64_t b64[1];
++ } c;
++ union {
++ u_int8_t b8[64];
++ u_int32_t b32[16];
++ } m;
++ u_int8_t count;
++};
++
++#ifdef __KERNEL__
++extern void sha1_init(struct sha1_ctxt *);
++extern void sha1_pad(struct sha1_ctxt *);
++extern void sha1_loop(struct sha1_ctxt *, const u_int8_t *, size_t);
++extern void sha1_result(struct sha1_ctxt *, caddr_t);
++
++/* compatibilty with other SHA1 source codes */
++typedef struct sha1_ctxt SHA1_CTX;
++#define SHA1Init(x) sha1_init((x))
++#define SHA1Update(x, y, z) sha1_loop((x), (y), (z))
++#define SHA1Final(x, y) sha1_result((y), (x))
++#endif /* __KERNEL__ */
++
++#define SHA1_RESULTLEN (160/8)
++
++#endif /*_NETINET6_SHA1_H_*/
+diff -Nur linux-2.6.30.orig/crypto/ocf/talitos/Makefile linux-2.6.30/crypto/ocf/talitos/Makefile
+--- linux-2.6.30.orig/crypto/ocf/talitos/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/talitos/Makefile 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,12 @@
++# for SGlinux builds
++-include $(ROOTDIR)/modules/.config
++
++obj-$(CONFIG_OCF_TALITOS) += talitos.o
++
++obj ?= .
++EXTRA_CFLAGS += -I$(obj)/.. -I$(obj)/
++
++ifdef TOPDIR
++-include $(TOPDIR)/Rules.make
++endif
++
+diff -Nur linux-2.6.30.orig/crypto/ocf/talitos/talitos.c linux-2.6.30/crypto/ocf/talitos/talitos.c
+--- linux-2.6.30.orig/crypto/ocf/talitos/talitos.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/talitos/talitos.c 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,1359 @@
++/*
++ * crypto/ocf/talitos/talitos.c
++ *
++ * An OCF-Linux module that uses Freescale's SEC to do the crypto.
++ * Based on crypto/ocf/hifn and crypto/ocf/safe OCF drivers
++ *
++ * Copyright (c) 2006 Freescale Semiconductor, Inc.
++ *
++ * This code written by Kim A. B. Phillips <kim.phillips@freescale.com>
++ * some code copied from files with the following:
++ * Copyright (C) 2004-2007 David McCullough <david_mccullough@securecomputing.com
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * ---------------------------------------------------------------------------
++ *
++ * NOTES:
++ *
++ * The Freescale SEC (also known as 'talitos') resides on the
++ * internal bus, and runs asynchronous to the processor core. It has
++ * a wide gamut of cryptographic acceleration features, including single-
++ * pass IPsec (also known as algorithm chaining). To properly utilize
++ * all of the SEC's performance enhancing features, further reworking
++ * of higher level code (framework, applications) will be necessary.
++ *
++ * The following table shows which SEC version is present in which devices:
++ *
++ * Devices SEC version
++ *
++ * 8272, 8248 SEC 1.0
++ * 885, 875 SEC 1.2
++ * 8555E, 8541E SEC 2.0
++ * 8349E SEC 2.01
++ * 8548E SEC 2.1
++ *
++ * The following table shows the features offered by each SEC version:
++ *
++ * Max. chan-
++ * version Bus I/F Clock nels DEU AESU AFEU MDEU PKEU RNG KEU
++ *
++ * SEC 1.0 internal 64b 100MHz 4 1 1 1 1 1 1 0
++ * SEC 1.2 internal 32b 66MHz 1 1 1 0 1 0 0 0
++ * SEC 2.0 internal 64b 166MHz 4 1 1 1 1 1 1 0
++ * SEC 2.01 internal 64b 166MHz 4 1 1 1 1 1 1 0
++ * SEC 2.1 internal 64b 333MHz 4 1 1 1 1 1 1 1
++ *
++ * Each execution unit in the SEC has two modes of execution; channel and
++ * slave/debug. This driver employs the channel infrastructure in the
++ * device for convenience. Only the RNG is directly accessed due to the
++ * convenience of its random fifo pool. The relationship between the
++ * channels and execution units is depicted in the following diagram:
++ *
++ * ------- ------------
++ * ---| ch0 |---| |
++ * ------- | |
++ * | |------+-------+-------+-------+------------
++ * ------- | | | | | | |
++ * ---| ch1 |---| | | | | | |
++ * ------- | | ------ ------ ------ ------ ------
++ * |controller| |DEU | |AESU| |MDEU| |PKEU| ... |RNG |
++ * ------- | | ------ ------ ------ ------ ------
++ * ---| ch2 |---| | | | | | |
++ * ------- | | | | | | |
++ * | |------+-------+-------+-------+------------
++ * ------- | |
++ * ---| ch3 |---| |
++ * ------- ------------
++ *
++ * Channel ch0 may drive an aes operation to the aes unit (AESU),
++ * and, at the same time, ch1 may drive a message digest operation
++ * to the mdeu. Each channel has an input descriptor FIFO, and the
++ * FIFO can contain, e.g. on the 8541E, up to 24 entries, before a
++ * a buffer overrun error is triggered. The controller is responsible
++ * for fetching the data from descriptor pointers, and passing the
++ * data to the appropriate EUs. The controller also writes the
++ * cryptographic operation's result to memory. The SEC notifies
++ * completion by triggering an interrupt and/or setting the 1st byte
++ * of the hdr field to 0xff.
++ *
++ * TODO:
++ * o support more algorithms
++ * o support more versions of the SEC
++ * o add support for linux 2.4
++ * o scatter-gather (sg) support
++ * o add support for public key ops (PKEU)
++ * o add statistics
++ */
++
++#ifndef AUTOCONF_INCLUDED
++#include <linux/config.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/random.h>
++#include <linux/skbuff.h>
++#include <asm/scatterlist.h>
++#include <linux/dma-mapping.h> /* dma_map_single() */
++#include <linux/moduleparam.h>
++
++#include <linux/version.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
++#include <linux/platform_device.h>
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++#include <linux/of_platform.h>
++#endif
++
++#include <cryptodev.h>
++#include <uio.h>
++
++#define DRV_NAME "talitos"
++
++#include "talitos_dev.h"
++#include "talitos_soft.h"
++
++#define read_random(p,l) get_random_bytes(p,l)
++
++const char talitos_driver_name[] = "Talitos OCF";
++const char talitos_driver_version[] = "0.2";
++
++static int talitos_newsession(device_t dev, u_int32_t *sidp,
++ struct cryptoini *cri);
++static int talitos_freesession(device_t dev, u_int64_t tid);
++static int talitos_process(device_t dev, struct cryptop *crp, int hint);
++static void dump_talitos_status(struct talitos_softc *sc);
++static int talitos_submit(struct talitos_softc *sc, struct talitos_desc *td,
++ int chsel);
++static void talitos_doneprocessing(struct talitos_softc *sc);
++static void talitos_init_device(struct talitos_softc *sc);
++static void talitos_reset_device_master(struct talitos_softc *sc);
++static void talitos_reset_device(struct talitos_softc *sc);
++static void talitos_errorprocessing(struct talitos_softc *sc);
++#ifdef CONFIG_PPC_MERGE
++static int talitos_probe(struct of_device *ofdev, const struct of_device_id *match);
++static int talitos_remove(struct of_device *ofdev);
++#else
++static int talitos_probe(struct platform_device *pdev);
++static int talitos_remove(struct platform_device *pdev);
++#endif
++#ifdef CONFIG_OCF_RANDOMHARVEST
++static int talitos_read_random(void *arg, u_int32_t *buf, int maxwords);
++static void talitos_rng_init(struct talitos_softc *sc);
++#endif
++
++static device_method_t talitos_methods = {
++ /* crypto device methods */
++ DEVMETHOD(cryptodev_newsession, talitos_newsession),
++ DEVMETHOD(cryptodev_freesession,talitos_freesession),
++ DEVMETHOD(cryptodev_process, talitos_process),
++};
++
++#define debug talitos_debug
++int talitos_debug = 0;
++module_param(talitos_debug, int, 0644);
++MODULE_PARM_DESC(talitos_debug, "Enable debug");
++
++static inline void talitos_write(volatile unsigned *addr, u32 val)
++{
++ out_be32(addr, val);
++}
++
++static inline u32 talitos_read(volatile unsigned *addr)
++{
++ u32 val;
++ val = in_be32(addr);
++ return val;
++}
++
++static void dump_talitos_status(struct talitos_softc *sc)
++{
++ unsigned int v, v_hi, i, *ptr;
++ v = talitos_read(sc->sc_base_addr + TALITOS_MCR);
++ v_hi = talitos_read(sc->sc_base_addr + TALITOS_MCR_HI);
++ printk(KERN_INFO "%s: MCR 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), v, v_hi);
++ v = talitos_read(sc->sc_base_addr + TALITOS_IMR);
++ v_hi = talitos_read(sc->sc_base_addr + TALITOS_IMR_HI);
++ printk(KERN_INFO "%s: IMR 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), v, v_hi);
++ v = talitos_read(sc->sc_base_addr + TALITOS_ISR);
++ v_hi = talitos_read(sc->sc_base_addr + TALITOS_ISR_HI);
++ printk(KERN_INFO "%s: ISR 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), v, v_hi);
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CDPR);
++ v_hi = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CDPR_HI);
++ printk(KERN_INFO "%s: CDPR ch%d 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), i, v, v_hi);
++ }
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CCPSR);
++ v_hi = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CCPSR_HI);
++ printk(KERN_INFO "%s: CCPSR ch%d 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), i, v, v_hi);
++ }
++ ptr = sc->sc_base_addr + TALITOS_CH_DESCBUF;
++ for (i = 0; i < 16; i++) {
++ v = talitos_read(ptr++); v_hi = talitos_read(ptr++);
++ printk(KERN_INFO "%s: DESCBUF ch0 0x%08x_%08x (tdp%02d)\n",
++ device_get_nameunit(sc->sc_cdev), v, v_hi, i);
++ }
++ return;
++}
++
++
++#ifdef CONFIG_OCF_RANDOMHARVEST
++/*
++ * pull random numbers off the RNG FIFO, not exceeding amount available
++ */
++static int
++talitos_read_random(void *arg, u_int32_t *buf, int maxwords)
++{
++ struct talitos_softc *sc = (struct talitos_softc *) arg;
++ int rc;
++ u_int32_t v;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /* check for things like FIFO underflow */
++ v = talitos_read(sc->sc_base_addr + TALITOS_RNGISR_HI);
++ if (unlikely(v)) {
++ printk(KERN_ERR "%s: RNGISR_HI error %08x\n",
++ device_get_nameunit(sc->sc_cdev), v);
++ return 0;
++ }
++ /*
++ * OFL is number of available 64-bit words,
++ * shift and convert to a 32-bit word count
++ */
++ v = talitos_read(sc->sc_base_addr + TALITOS_RNGSR_HI);
++ v = (v & TALITOS_RNGSR_HI_OFL) >> (16 - 1);
++ if (maxwords > v)
++ maxwords = v;
++ for (rc = 0; rc < maxwords; rc++) {
++ buf[rc] = talitos_read(sc->sc_base_addr +
++ TALITOS_RNG_FIFO + rc*sizeof(u_int32_t));
++ }
++ if (maxwords & 1) {
++ /*
++ * RNG will complain with an AE in the RNGISR
++ * if we don't complete the pairs of 32-bit reads
++ * to its 64-bit register based FIFO
++ */
++ v = talitos_read(sc->sc_base_addr +
++ TALITOS_RNG_FIFO + rc*sizeof(u_int32_t));
++ }
++
++ return rc;
++}
++
++static void
++talitos_rng_init(struct talitos_softc *sc)
++{
++ u_int32_t v;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ /* reset RNG EU */
++ v = talitos_read(sc->sc_base_addr + TALITOS_RNGRCR_HI);
++ v |= TALITOS_RNGRCR_HI_SR;
++ talitos_write(sc->sc_base_addr + TALITOS_RNGRCR_HI, v);
++ while ((talitos_read(sc->sc_base_addr + TALITOS_RNGSR_HI)
++ & TALITOS_RNGSR_HI_RD) == 0)
++ cpu_relax();
++ /*
++ * we tell the RNG to start filling the RNG FIFO
++ * by writing the RNGDSR
++ */
++ v = talitos_read(sc->sc_base_addr + TALITOS_RNGDSR_HI);
++ talitos_write(sc->sc_base_addr + TALITOS_RNGDSR_HI, v);
++ /*
++ * 64 bits of data will be pushed onto the FIFO every
++ * 256 SEC cycles until the FIFO is full. The RNG then
++ * attempts to keep the FIFO full.
++ */
++ v = talitos_read(sc->sc_base_addr + TALITOS_RNGISR_HI);
++ if (v) {
++ printk(KERN_ERR "%s: RNGISR_HI error %08x\n",
++ device_get_nameunit(sc->sc_cdev), v);
++ return;
++ }
++ /*
++ * n.b. we need to add a FIPS test here - if the RNG is going
++ * to fail, it's going to fail at reset time
++ */
++ return;
++}
++#endif /* CONFIG_OCF_RANDOMHARVEST */
++
++/*
++ * Generate a new software session.
++ */
++static int
++talitos_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
++{
++ struct cryptoini *c, *encini = NULL, *macini = NULL;
++ struct talitos_softc *sc = device_get_softc(dev);
++ struct talitos_session *ses = NULL;
++ int sesn;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ if (sidp == NULL || cri == NULL || sc == NULL) {
++ DPRINTF("%s,%d - EINVAL\n", __FILE__, __LINE__);
++ return EINVAL;
++ }
++ for (c = cri; c != NULL; c = c->cri_next) {
++ if (c->cri_alg == CRYPTO_MD5 ||
++ c->cri_alg == CRYPTO_MD5_HMAC ||
++ c->cri_alg == CRYPTO_SHA1 ||
++ c->cri_alg == CRYPTO_SHA1_HMAC ||
++ c->cri_alg == CRYPTO_NULL_HMAC) {
++ if (macini)
++ return EINVAL;
++ macini = c;
++ } else if (c->cri_alg == CRYPTO_DES_CBC ||
++ c->cri_alg == CRYPTO_3DES_CBC ||
++ c->cri_alg == CRYPTO_AES_CBC ||
++ c->cri_alg == CRYPTO_NULL_CBC) {
++ if (encini)
++ return EINVAL;
++ encini = c;
++ } else {
++ DPRINTF("UNKNOWN c->cri_alg %d\n", encini->cri_alg);
++ return EINVAL;
++ }
++ }
++ if (encini == NULL && macini == NULL)
++ return EINVAL;
++ if (encini) {
++ /* validate key length */
++ switch (encini->cri_alg) {
++ case CRYPTO_DES_CBC:
++ if (encini->cri_klen != 64)
++ return EINVAL;
++ break;
++ case CRYPTO_3DES_CBC:
++ if (encini->cri_klen != 192) {
++ return EINVAL;
++ }
++ break;
++ case CRYPTO_AES_CBC:
++ if (encini->cri_klen != 128 &&
++ encini->cri_klen != 192 &&
++ encini->cri_klen != 256)
++ return EINVAL;
++ break;
++ default:
++ DPRINTF("UNKNOWN encini->cri_alg %d\n",
++ encini->cri_alg);
++ return EINVAL;
++ }
++ }
++
++ if (sc->sc_sessions == NULL) {
++ ses = sc->sc_sessions = (struct talitos_session *)
++ kmalloc(sizeof(struct talitos_session), SLAB_ATOMIC);
++ if (ses == NULL)
++ return ENOMEM;
++ memset(ses, 0, sizeof(struct talitos_session));
++ sesn = 0;
++ sc->sc_nsessions = 1;
++ } else {
++ for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
++ if (sc->sc_sessions[sesn].ses_used == 0) {
++ ses = &sc->sc_sessions[sesn];
++ break;
++ }
++ }
++
++ if (ses == NULL) {
++ /* allocating session */
++ sesn = sc->sc_nsessions;
++ ses = (struct talitos_session *) kmalloc(
++ (sesn + 1) * sizeof(struct talitos_session),
++ SLAB_ATOMIC);
++ if (ses == NULL)
++ return ENOMEM;
++ memset(ses, 0,
++ (sesn + 1) * sizeof(struct talitos_session));
++ memcpy(ses, sc->sc_sessions,
++ sesn * sizeof(struct talitos_session));
++ memset(sc->sc_sessions, 0,
++ sesn * sizeof(struct talitos_session));
++ kfree(sc->sc_sessions);
++ sc->sc_sessions = ses;
++ ses = &sc->sc_sessions[sesn];
++ sc->sc_nsessions++;
++ }
++ }
++
++ ses->ses_used = 1;
++
++ if (encini) {
++ /* get an IV */
++ /* XXX may read fewer than requested */
++ read_random(ses->ses_iv, sizeof(ses->ses_iv));
++
++ ses->ses_klen = (encini->cri_klen + 7) / 8;
++ memcpy(ses->ses_key, encini->cri_key, ses->ses_klen);
++ if (macini) {
++ /* doing hash on top of cipher */
++ ses->ses_hmac_len = (macini->cri_klen + 7) / 8;
++ memcpy(ses->ses_hmac, macini->cri_key,
++ ses->ses_hmac_len);
++ }
++ } else if (macini) {
++ /* doing hash */
++ ses->ses_klen = (macini->cri_klen + 7) / 8;
++ memcpy(ses->ses_key, macini->cri_key, ses->ses_klen);
++ }
++
++ /* back compat way of determining MSC result len */
++ if (macini) {
++ ses->ses_mlen = macini->cri_mlen;
++ if (ses->ses_mlen == 0) {
++ if (macini->cri_alg == CRYPTO_MD5_HMAC)
++ ses->ses_mlen = MD5_HASH_LEN;
++ else
++ ses->ses_mlen = SHA1_HASH_LEN;
++ }
++ }
++
++ /* really should make up a template td here,
++ * and only fill things like i/o and direction in process() */
++
++ /* assign session ID */
++ *sidp = TALITOS_SID(sc->sc_num, sesn);
++ return 0;
++}
++
++/*
++ * Deallocate a session.
++ */
++static int
++talitos_freesession(device_t dev, u_int64_t tid)
++{
++ struct talitos_softc *sc = device_get_softc(dev);
++ int session, ret;
++ u_int32_t sid = ((u_int32_t) tid) & 0xffffffff;
++
++ if (sc == NULL)
++ return EINVAL;
++ session = TALITOS_SESSION(sid);
++ if (session < sc->sc_nsessions) {
++ memset(&sc->sc_sessions[session], 0,
++ sizeof(sc->sc_sessions[session]));
++ ret = 0;
++ } else
++ ret = EINVAL;
++ return ret;
++}
++
++/*
++ * launch device processing - it will come back with done notification
++ * in the form of an interrupt and/or HDR_DONE_BITS in header
++ */
++static int
++talitos_submit(
++ struct talitos_softc *sc,
++ struct talitos_desc *td,
++ int chsel)
++{
++ u_int32_t v;
++
++ v = dma_map_single(NULL, td, sizeof(*td), DMA_TO_DEVICE);
++ talitos_write(sc->sc_base_addr +
++ chsel*TALITOS_CH_OFFSET + TALITOS_CH_FF, 0);
++ talitos_write(sc->sc_base_addr +
++ chsel*TALITOS_CH_OFFSET + TALITOS_CH_FF_HI, v);
++ return 0;
++}
++
++static int
++talitos_process(device_t dev, struct cryptop *crp, int hint)
++{
++ int i, err = 0, ivsize;
++ struct talitos_softc *sc = device_get_softc(dev);
++ struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
++ caddr_t iv;
++ struct talitos_session *ses;
++ struct talitos_desc *td;
++ unsigned long flags;
++ /* descriptor mappings */
++ int hmac_key, hmac_data, cipher_iv, cipher_key,
++ in_fifo, out_fifo, cipher_iv_out;
++ static int chsel = -1;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ if (crp == NULL || crp->crp_callback == NULL || sc == NULL) {
++ return EINVAL;
++ }
++ crp->crp_etype = 0;
++ if (TALITOS_SESSION(crp->crp_sid) >= sc->sc_nsessions) {
++ return EINVAL;
++ }
++
++ ses = &sc->sc_sessions[TALITOS_SESSION(crp->crp_sid)];
++
++ /* enter the channel scheduler */
++ spin_lock_irqsave(&sc->sc_chnfifolock[sc->sc_num_channels], flags);
++
++ /* reuse channel that already had/has requests for the required EU */
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ if (sc->sc_chnlastalg[i] == crp->crp_desc->crd_alg)
++ break;
++ }
++ if (i == sc->sc_num_channels) {
++ /*
++ * haven't seen this algo the last sc_num_channels or more
++ * use round robin in this case
++ * nb: sc->sc_num_channels must be power of 2
++ */
++ chsel = (chsel + 1) & (sc->sc_num_channels - 1);
++ } else {
++ /*
++ * matches channel with same target execution unit;
++ * use same channel in this case
++ */
++ chsel = i;
++ }
++ sc->sc_chnlastalg[chsel] = crp->crp_desc->crd_alg;
++
++ /* release the channel scheduler lock */
++ spin_unlock_irqrestore(&sc->sc_chnfifolock[sc->sc_num_channels], flags);
++
++ /* acquire the selected channel fifo lock */
++ spin_lock_irqsave(&sc->sc_chnfifolock[chsel], flags);
++
++ /* find and reserve next available descriptor-cryptop pair */
++ for (i = 0; i < sc->sc_chfifo_len; i++) {
++ if (sc->sc_chnfifo[chsel][i].cf_desc.hdr == 0) {
++ /*
++ * ensure correct descriptor formation by
++ * avoiding inadvertently setting "optional" entries
++ * e.g. not using "optional" dptr2 for MD/HMAC descs
++ */
++ memset(&sc->sc_chnfifo[chsel][i].cf_desc,
++ 0, sizeof(*td));
++ /* reserve it with done notification request bit */
++ sc->sc_chnfifo[chsel][i].cf_desc.hdr |=
++ TALITOS_DONE_NOTIFY;
++ break;
++ }
++ }
++ spin_unlock_irqrestore(&sc->sc_chnfifolock[chsel], flags);
++
++ if (i == sc->sc_chfifo_len) {
++ /* fifo full */
++ err = ERESTART;
++ goto errout;
++ }
++
++ td = &sc->sc_chnfifo[chsel][i].cf_desc;
++ sc->sc_chnfifo[chsel][i].cf_crp = crp;
++
++ crd1 = crp->crp_desc;
++ if (crd1 == NULL) {
++ err = EINVAL;
++ goto errout;
++ }
++ crd2 = crd1->crd_next;
++ /* prevent compiler warning */
++ hmac_key = 0;
++ hmac_data = 0;
++ if (crd2 == NULL) {
++ td->hdr |= TD_TYPE_COMMON_NONSNOOP_NO_AFEU;
++ /* assign descriptor dword ptr mappings for this desc. type */
++ cipher_iv = 1;
++ cipher_key = 2;
++ in_fifo = 3;
++ cipher_iv_out = 5;
++ if (crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1 ||
++ crd1->crd_alg == CRYPTO_MD5) {
++ out_fifo = 5;
++ maccrd = crd1;
++ enccrd = NULL;
++ } else if (crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC ||
++ crd1->crd_alg == CRYPTO_ARC4) {
++ out_fifo = 4;
++ maccrd = NULL;
++ enccrd = crd1;
++ } else {
++ DPRINTF("UNKNOWN crd1->crd_alg %d\n", crd1->crd_alg);
++ err = EINVAL;
++ goto errout;
++ }
++ } else {
++ if (sc->sc_desc_types & TALITOS_HAS_DT_IPSEC_ESP) {
++ td->hdr |= TD_TYPE_IPSEC_ESP;
++ } else {
++ DPRINTF("unimplemented: multiple descriptor ipsec\n");
++ err = EINVAL;
++ goto errout;
++ }
++ /* assign descriptor dword ptr mappings for this desc. type */
++ hmac_key = 0;
++ hmac_data = 1;
++ cipher_iv = 2;
++ cipher_key = 3;
++ in_fifo = 4;
++ out_fifo = 5;
++ cipher_iv_out = 6;
++ if ((crd1->crd_alg == CRYPTO_MD5_HMAC ||
++ crd1->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd1->crd_alg == CRYPTO_MD5 ||
++ crd1->crd_alg == CRYPTO_SHA1) &&
++ (crd2->crd_alg == CRYPTO_DES_CBC ||
++ crd2->crd_alg == CRYPTO_3DES_CBC ||
++ crd2->crd_alg == CRYPTO_AES_CBC ||
++ crd2->crd_alg == CRYPTO_ARC4) &&
++ ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) {
++ maccrd = crd1;
++ enccrd = crd2;
++ } else if ((crd1->crd_alg == CRYPTO_DES_CBC ||
++ crd1->crd_alg == CRYPTO_ARC4 ||
++ crd1->crd_alg == CRYPTO_3DES_CBC ||
++ crd1->crd_alg == CRYPTO_AES_CBC) &&
++ (crd2->crd_alg == CRYPTO_MD5_HMAC ||
++ crd2->crd_alg == CRYPTO_SHA1_HMAC ||
++ crd2->crd_alg == CRYPTO_MD5 ||
++ crd2->crd_alg == CRYPTO_SHA1) &&
++ (crd1->crd_flags & CRD_F_ENCRYPT)) {
++ enccrd = crd1;
++ maccrd = crd2;
++ } else {
++ /* We cannot order the SEC as requested */
++ printk("%s: cannot do the order\n",
++ device_get_nameunit(sc->sc_cdev));
++ err = EINVAL;
++ goto errout;
++ }
++ }
++ /* assign in_fifo and out_fifo based on input/output struct type */
++ if (crp->crp_flags & CRYPTO_F_SKBUF) {
++ /* using SKB buffers */
++ struct sk_buff *skb = (struct sk_buff *)crp->crp_buf;
++ if (skb_shinfo(skb)->nr_frags) {
++ printk("%s: skb frags unimplemented\n",
++ device_get_nameunit(sc->sc_cdev));
++ err = EINVAL;
++ goto errout;
++ }
++ td->ptr[in_fifo].ptr = dma_map_single(NULL, skb->data,
++ skb->len, DMA_TO_DEVICE);
++ td->ptr[in_fifo].len = skb->len;
++ td->ptr[out_fifo].ptr = dma_map_single(NULL, skb->data,
++ skb->len, DMA_TO_DEVICE);
++ td->ptr[out_fifo].len = skb->len;
++ td->ptr[hmac_data].ptr = dma_map_single(NULL, skb->data,
++ skb->len, DMA_TO_DEVICE);
++ } else if (crp->crp_flags & CRYPTO_F_IOV) {
++ /* using IOV buffers */
++ struct uio *uiop = (struct uio *)crp->crp_buf;
++ if (uiop->uio_iovcnt > 1) {
++ printk("%s: iov frags unimplemented\n",
++ device_get_nameunit(sc->sc_cdev));
++ err = EINVAL;
++ goto errout;
++ }
++ td->ptr[in_fifo].ptr = dma_map_single(NULL,
++ uiop->uio_iov->iov_base, crp->crp_ilen, DMA_TO_DEVICE);
++ td->ptr[in_fifo].len = crp->crp_ilen;
++ /* crp_olen is never set; always use crp_ilen */
++ td->ptr[out_fifo].ptr = dma_map_single(NULL,
++ uiop->uio_iov->iov_base,
++ crp->crp_ilen, DMA_TO_DEVICE);
++ td->ptr[out_fifo].len = crp->crp_ilen;
++ } else {
++ /* using contig buffers */
++ td->ptr[in_fifo].ptr = dma_map_single(NULL,
++ crp->crp_buf, crp->crp_ilen, DMA_TO_DEVICE);
++ td->ptr[in_fifo].len = crp->crp_ilen;
++ td->ptr[out_fifo].ptr = dma_map_single(NULL,
++ crp->crp_buf, crp->crp_ilen, DMA_TO_DEVICE);
++ td->ptr[out_fifo].len = crp->crp_ilen;
++ }
++ if (enccrd) {
++ switch (enccrd->crd_alg) {
++ case CRYPTO_3DES_CBC:
++ td->hdr |= TALITOS_MODE0_DEU_3DES;
++ /* FALLTHROUGH */
++ case CRYPTO_DES_CBC:
++ td->hdr |= TALITOS_SEL0_DEU
++ | TALITOS_MODE0_DEU_CBC;
++ if (enccrd->crd_flags & CRD_F_ENCRYPT)
++ td->hdr |= TALITOS_MODE0_DEU_ENC;
++ ivsize = 2*sizeof(u_int32_t);
++ DPRINTF("%cDES ses %d ch %d len %d\n",
++ (td->hdr & TALITOS_MODE0_DEU_3DES)?'3':'1',
++ (u32)TALITOS_SESSION(crp->crp_sid),
++ chsel, td->ptr[in_fifo].len);
++ break;
++ case CRYPTO_AES_CBC:
++ td->hdr |= TALITOS_SEL0_AESU
++ | TALITOS_MODE0_AESU_CBC;
++ if (enccrd->crd_flags & CRD_F_ENCRYPT)
++ td->hdr |= TALITOS_MODE0_AESU_ENC;
++ ivsize = 4*sizeof(u_int32_t);
++ DPRINTF("AES ses %d ch %d len %d\n",
++ (u32)TALITOS_SESSION(crp->crp_sid),
++ chsel, td->ptr[in_fifo].len);
++ break;
++ default:
++ printk("%s: unimplemented enccrd->crd_alg %d\n",
++ device_get_nameunit(sc->sc_cdev), enccrd->crd_alg);
++ err = EINVAL;
++ goto errout;
++ }
++ /*
++ * Setup encrypt/decrypt state. When using basic ops
++ * we can't use an inline IV because hash/crypt offset
++ * must be from the end of the IV to the start of the
++ * crypt data and this leaves out the preceding header
++ * from the hash calculation. Instead we place the IV
++ * in the state record and set the hash/crypt offset to
++ * copy both the header+IV.
++ */
++ if (enccrd->crd_flags & CRD_F_ENCRYPT) {
++ td->hdr |= TALITOS_DIR_OUTBOUND;
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
++ iv = enccrd->crd_iv;
++ else
++ iv = (caddr_t) ses->ses_iv;
++ if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) {
++ crypto_copyback(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize, iv);
++ }
++ } else {
++ td->hdr |= TALITOS_DIR_INBOUND;
++ if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) {
++ iv = enccrd->crd_iv;
++ bcopy(enccrd->crd_iv, iv, ivsize);
++ } else {
++ iv = (caddr_t) ses->ses_iv;
++ crypto_copydata(crp->crp_flags, crp->crp_buf,
++ enccrd->crd_inject, ivsize, iv);
++ }
++ }
++ td->ptr[cipher_iv].ptr = dma_map_single(NULL, iv, ivsize,
++ DMA_TO_DEVICE);
++ td->ptr[cipher_iv].len = ivsize;
++ /*
++ * we don't need the cipher iv out length/pointer
++ * field to do ESP IPsec. Therefore we set the len field as 0,
++ * which tells the SEC not to do anything with this len/ptr
++ * field. Previously, when length/pointer as pointing to iv,
++ * it gave us corruption of packets.
++ */
++ td->ptr[cipher_iv_out].len = 0;
++ }
++ if (enccrd && maccrd) {
++ /* this is ipsec only for now */
++ td->hdr |= TALITOS_SEL1_MDEU
++ | TALITOS_MODE1_MDEU_INIT
++ | TALITOS_MODE1_MDEU_PAD;
++ switch (maccrd->crd_alg) {
++ case CRYPTO_MD5:
++ td->hdr |= TALITOS_MODE1_MDEU_MD5;
++ break;
++ case CRYPTO_MD5_HMAC:
++ td->hdr |= TALITOS_MODE1_MDEU_MD5_HMAC;
++ break;
++ case CRYPTO_SHA1:
++ td->hdr |= TALITOS_MODE1_MDEU_SHA1;
++ break;
++ case CRYPTO_SHA1_HMAC:
++ td->hdr |= TALITOS_MODE1_MDEU_SHA1_HMAC;
++ break;
++ default:
++ /* We cannot order the SEC as requested */
++ printk("%s: cannot do the order\n",
++ device_get_nameunit(sc->sc_cdev));
++ err = EINVAL;
++ goto errout;
++ }
++ if ((maccrd->crd_alg == CRYPTO_MD5_HMAC) ||
++ (maccrd->crd_alg == CRYPTO_SHA1_HMAC)) {
++ /*
++ * The offset from hash data to the start of
++ * crypt data is the difference in the skips.
++ */
++ /* ipsec only for now */
++ td->ptr[hmac_key].ptr = dma_map_single(NULL,
++ ses->ses_hmac, ses->ses_hmac_len, DMA_TO_DEVICE);
++ td->ptr[hmac_key].len = ses->ses_hmac_len;
++ td->ptr[in_fifo].ptr += enccrd->crd_skip;
++ td->ptr[in_fifo].len = enccrd->crd_len;
++ td->ptr[out_fifo].ptr += enccrd->crd_skip;
++ td->ptr[out_fifo].len = enccrd->crd_len;
++ /* bytes of HMAC to postpend to ciphertext */
++ td->ptr[out_fifo].extent = ses->ses_mlen;
++ td->ptr[hmac_data].ptr += maccrd->crd_skip;
++ td->ptr[hmac_data].len = enccrd->crd_skip - maccrd->crd_skip;
++ }
++ if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT) {
++ printk("%s: CRD_F_KEY_EXPLICIT unimplemented\n",
++ device_get_nameunit(sc->sc_cdev));
++ }
++ }
++ if (!enccrd && maccrd) {
++ /* single MD5 or SHA */
++ td->hdr |= TALITOS_SEL0_MDEU
++ | TALITOS_MODE0_MDEU_INIT
++ | TALITOS_MODE0_MDEU_PAD;
++ switch (maccrd->crd_alg) {
++ case CRYPTO_MD5:
++ td->hdr |= TALITOS_MODE0_MDEU_MD5;
++ DPRINTF("MD5 ses %d ch %d len %d\n",
++ (u32)TALITOS_SESSION(crp->crp_sid),
++ chsel, td->ptr[in_fifo].len);
++ break;
++ case CRYPTO_MD5_HMAC:
++ td->hdr |= TALITOS_MODE0_MDEU_MD5_HMAC;
++ break;
++ case CRYPTO_SHA1:
++ td->hdr |= TALITOS_MODE0_MDEU_SHA1;
++ DPRINTF("SHA1 ses %d ch %d len %d\n",
++ (u32)TALITOS_SESSION(crp->crp_sid),
++ chsel, td->ptr[in_fifo].len);
++ break;
++ case CRYPTO_SHA1_HMAC:
++ td->hdr |= TALITOS_MODE0_MDEU_SHA1_HMAC;
++ break;
++ default:
++ /* We cannot order the SEC as requested */
++ DPRINTF("cannot do the order\n");
++ err = EINVAL;
++ goto errout;
++ }
++
++ if (crp->crp_flags & CRYPTO_F_IOV)
++ td->ptr[out_fifo].ptr += maccrd->crd_inject;
++
++ if ((maccrd->crd_alg == CRYPTO_MD5_HMAC) ||
++ (maccrd->crd_alg == CRYPTO_SHA1_HMAC)) {
++ td->ptr[hmac_key].ptr = dma_map_single(NULL,
++ ses->ses_hmac, ses->ses_hmac_len,
++ DMA_TO_DEVICE);
++ td->ptr[hmac_key].len = ses->ses_hmac_len;
++ }
++ }
++ else {
++ /* using process key (session data has duplicate) */
++ td->ptr[cipher_key].ptr = dma_map_single(NULL,
++ enccrd->crd_key, (enccrd->crd_klen + 7) / 8,
++ DMA_TO_DEVICE);
++ td->ptr[cipher_key].len = (enccrd->crd_klen + 7) / 8;
++ }
++ /* descriptor complete - GO! */
++ return talitos_submit(sc, td, chsel);
++
++errout:
++ if (err != ERESTART) {
++ crp->crp_etype = err;
++ crypto_done(crp);
++ }
++ return err;
++}
++
++/* go through all channels descriptors, notifying OCF what has
++ * _and_hasn't_ successfully completed and reset the device
++ * (otherwise it's up to decoding desc hdrs!)
++ */
++static void talitos_errorprocessing(struct talitos_softc *sc)
++{
++ unsigned long flags;
++ int i, j;
++
++ /* disable further scheduling until under control */
++ spin_lock_irqsave(&sc->sc_chnfifolock[sc->sc_num_channels], flags);
++
++ if (debug) dump_talitos_status(sc);
++ /* go through descriptors, try and salvage those successfully done,
++ * and EIO those that weren't
++ */
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ spin_lock_irqsave(&sc->sc_chnfifolock[i], flags);
++ for (j = 0; j < sc->sc_chfifo_len; j++) {
++ if (sc->sc_chnfifo[i][j].cf_desc.hdr) {
++ if ((sc->sc_chnfifo[i][j].cf_desc.hdr
++ & TALITOS_HDR_DONE_BITS)
++ != TALITOS_HDR_DONE_BITS) {
++ /* this one didn't finish */
++ /* signify in crp->etype */
++ sc->sc_chnfifo[i][j].cf_crp->crp_etype
++ = EIO;
++ }
++ } else
++ continue; /* free entry */
++ /* either way, notify ocf */
++ crypto_done(sc->sc_chnfifo[i][j].cf_crp);
++ /* and tag it available again
++ *
++ * memset to ensure correct descriptor formation by
++ * avoiding inadvertently setting "optional" entries
++ * e.g. not using "optional" dptr2 MD/HMAC processing
++ */
++ memset(&sc->sc_chnfifo[i][j].cf_desc,
++ 0, sizeof(struct talitos_desc));
++ }
++ spin_unlock_irqrestore(&sc->sc_chnfifolock[i], flags);
++ }
++ /* reset and initialize the SEC h/w device */
++ talitos_reset_device(sc);
++ talitos_init_device(sc);
++#ifdef CONFIG_OCF_RANDOMHARVEST
++ if (sc->sc_exec_units & TALITOS_HAS_EU_RNG)
++ talitos_rng_init(sc);
++#endif
++
++ /* Okay. Stand by. */
++ spin_unlock_irqrestore(&sc->sc_chnfifolock[sc->sc_num_channels], flags);
++
++ return;
++}
++
++/* go through all channels descriptors, notifying OCF what's been done */
++static void talitos_doneprocessing(struct talitos_softc *sc)
++{
++ unsigned long flags;
++ int i, j;
++
++ /* go through descriptors looking for done bits */
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ spin_lock_irqsave(&sc->sc_chnfifolock[i], flags);
++ for (j = 0; j < sc->sc_chfifo_len; j++) {
++ /* descriptor has done bits set? */
++ if ((sc->sc_chnfifo[i][j].cf_desc.hdr
++ & TALITOS_HDR_DONE_BITS)
++ == TALITOS_HDR_DONE_BITS) {
++ /* notify ocf */
++ crypto_done(sc->sc_chnfifo[i][j].cf_crp);
++ /* and tag it available again
++ *
++ * memset to ensure correct descriptor formation by
++ * avoiding inadvertently setting "optional" entries
++ * e.g. not using "optional" dptr2 MD/HMAC processing
++ */
++ memset(&sc->sc_chnfifo[i][j].cf_desc,
++ 0, sizeof(struct talitos_desc));
++ }
++ }
++ spin_unlock_irqrestore(&sc->sc_chnfifolock[i], flags);
++ }
++ return;
++}
++
++static irqreturn_t
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
++talitos_intr(int irq, void *arg)
++#else
++talitos_intr(int irq, void *arg, struct pt_regs *regs)
++#endif
++{
++ struct talitos_softc *sc = arg;
++ u_int32_t v, v_hi;
++
++ /* ack */
++ v = talitos_read(sc->sc_base_addr + TALITOS_ISR);
++ v_hi = talitos_read(sc->sc_base_addr + TALITOS_ISR_HI);
++ talitos_write(sc->sc_base_addr + TALITOS_ICR, v);
++ talitos_write(sc->sc_base_addr + TALITOS_ICR_HI, v_hi);
++
++ if (unlikely(v & TALITOS_ISR_ERROR)) {
++ /* Okay, Houston, we've had a problem here. */
++ printk(KERN_DEBUG "%s: got error interrupt - ISR 0x%08x_%08x\n",
++ device_get_nameunit(sc->sc_cdev), v, v_hi);
++ talitos_errorprocessing(sc);
++ } else
++ if (likely(v & TALITOS_ISR_DONE)) {
++ talitos_doneprocessing(sc);
++ }
++ return IRQ_HANDLED;
++}
++
++/*
++ * Initialize registers we need to touch only once.
++ */
++static void
++talitos_init_device(struct talitos_softc *sc)
++{
++ u_int32_t v;
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /* init all channels */
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ v = talitos_read(sc->sc_base_addr +
++ i*TALITOS_CH_OFFSET + TALITOS_CH_CCCR_HI);
++ v |= TALITOS_CH_CCCR_HI_CDWE
++ | TALITOS_CH_CCCR_HI_CDIE; /* invoke interrupt if done */
++ talitos_write(sc->sc_base_addr +
++ i*TALITOS_CH_OFFSET + TALITOS_CH_CCCR_HI, v);
++ }
++ /* enable all interrupts */
++ v = talitos_read(sc->sc_base_addr + TALITOS_IMR);
++ v |= TALITOS_IMR_ALL;
++ talitos_write(sc->sc_base_addr + TALITOS_IMR, v);
++ v = talitos_read(sc->sc_base_addr + TALITOS_IMR_HI);
++ v |= TALITOS_IMR_HI_ERRONLY;
++ talitos_write(sc->sc_base_addr + TALITOS_IMR_HI, v);
++ return;
++}
++
++/*
++ * set the master reset bit on the device.
++ */
++static void
++talitos_reset_device_master(struct talitos_softc *sc)
++{
++ u_int32_t v;
++
++ /* Reset the device by writing 1 to MCR:SWR and waiting 'til cleared */
++ v = talitos_read(sc->sc_base_addr + TALITOS_MCR);
++ talitos_write(sc->sc_base_addr + TALITOS_MCR, v | TALITOS_MCR_SWR);
++
++ while (talitos_read(sc->sc_base_addr + TALITOS_MCR) & TALITOS_MCR_SWR)
++ cpu_relax();
++
++ return;
++}
++
++/*
++ * Resets the device. Values in the registers are left as is
++ * from the reset (i.e. initial values are assigned elsewhere).
++ */
++static void
++talitos_reset_device(struct talitos_softc *sc)
++{
++ u_int32_t v;
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ /*
++ * Master reset
++ * errata documentation: warning: certain SEC interrupts
++ * are not fully cleared by writing the MCR:SWR bit,
++ * set bit twice to completely reset
++ */
++ talitos_reset_device_master(sc); /* once */
++ talitos_reset_device_master(sc); /* and once again */
++
++ /* reset all channels */
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CCCR);
++ talitos_write(sc->sc_base_addr + i*TALITOS_CH_OFFSET +
++ TALITOS_CH_CCCR, v | TALITOS_CH_CCCR_RESET);
++ }
++}
++
++/* Set up the crypto device structure, private data,
++ * and anything else we need before we start */
++#ifdef CONFIG_PPC_MERGE
++static int talitos_probe(struct of_device *ofdev, const struct of_device_id *match)
++#else
++static int talitos_probe(struct platform_device *pdev)
++#endif
++{
++ struct talitos_softc *sc = NULL;
++ struct resource *r;
++#ifdef CONFIG_PPC_MERGE
++ struct device *device = &ofdev->dev;
++ struct device_node *np = ofdev->node;
++ const unsigned int *prop;
++ int err;
++ struct resource res;
++#endif
++ static int num_chips = 0;
++ int rc;
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++
++ sc = (struct talitos_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
++ if (!sc)
++ return -ENOMEM;
++ memset(sc, 0, sizeof(*sc));
++
++ softc_device_init(sc, DRV_NAME, num_chips, talitos_methods);
++
++ sc->sc_irq = -1;
++ sc->sc_cid = -1;
++#ifndef CONFIG_PPC_MERGE
++ sc->sc_dev = pdev;
++#endif
++ sc->sc_num = num_chips++;
++
++#ifdef CONFIG_PPC_MERGE
++ dev_set_drvdata(device, sc);
++#else
++ platform_set_drvdata(sc->sc_dev, sc);
++#endif
++
++ /* get the irq line */
++#ifdef CONFIG_PPC_MERGE
++ err = of_address_to_resource(np, 0, &res);
++ if (err)
++ return -EINVAL;
++ r = &res;
++
++ sc->sc_irq = irq_of_parse_and_map(np, 0);
++#else
++ /* get a pointer to the register memory */
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++
++ sc->sc_irq = platform_get_irq(pdev, 0);
++#endif
++ rc = request_irq(sc->sc_irq, talitos_intr, 0,
++ device_get_nameunit(sc->sc_cdev), sc);
++ if (rc) {
++ printk(KERN_ERR "%s: failed to hook irq %d\n",
++ device_get_nameunit(sc->sc_cdev), sc->sc_irq);
++ sc->sc_irq = -1;
++ goto out;
++ }
++
++ sc->sc_base_addr = (ocf_iomem_t) ioremap(r->start, (r->end - r->start));
++ if (!sc->sc_base_addr) {
++ printk(KERN_ERR "%s: failed to ioremap\n",
++ device_get_nameunit(sc->sc_cdev));
++ goto out;
++ }
++
++ /* figure out our SEC's properties and capabilities */
++ sc->sc_chiprev = (u64)talitos_read(sc->sc_base_addr + TALITOS_ID) << 32
++ | talitos_read(sc->sc_base_addr + TALITOS_ID_HI);
++ DPRINTF("sec id 0x%llx\n", sc->sc_chiprev);
++
++#ifdef CONFIG_PPC_MERGE
++ /* get SEC properties from device tree, defaulting to SEC 2.0 */
++
++ prop = of_get_property(np, "num-channels", NULL);
++ sc->sc_num_channels = prop ? *prop : TALITOS_NCHANNELS_SEC_2_0;
++
++ prop = of_get_property(np, "channel-fifo-len", NULL);
++ sc->sc_chfifo_len = prop ? *prop : TALITOS_CHFIFOLEN_SEC_2_0;
++
++ prop = of_get_property(np, "exec-units-mask", NULL);
++ sc->sc_exec_units = prop ? *prop : TALITOS_HAS_EUS_SEC_2_0;
++
++ prop = of_get_property(np, "descriptor-types-mask", NULL);
++ sc->sc_desc_types = prop ? *prop : TALITOS_HAS_DESCTYPES_SEC_2_0;
++#else
++ /* bulk should go away with openfirmware flat device tree support */
++ if (sc->sc_chiprev & TALITOS_ID_SEC_2_0) {
++ sc->sc_num_channels = TALITOS_NCHANNELS_SEC_2_0;
++ sc->sc_chfifo_len = TALITOS_CHFIFOLEN_SEC_2_0;
++ sc->sc_exec_units = TALITOS_HAS_EUS_SEC_2_0;
++ sc->sc_desc_types = TALITOS_HAS_DESCTYPES_SEC_2_0;
++ } else {
++ printk(KERN_ERR "%s: failed to id device\n",
++ device_get_nameunit(sc->sc_cdev));
++ goto out;
++ }
++#endif
++
++ /* + 1 is for the meta-channel lock used by the channel scheduler */
++ sc->sc_chnfifolock = (spinlock_t *) kmalloc(
++ (sc->sc_num_channels + 1) * sizeof(spinlock_t), GFP_KERNEL);
++ if (!sc->sc_chnfifolock)
++ goto out;
++ for (i = 0; i < sc->sc_num_channels + 1; i++) {
++ spin_lock_init(&sc->sc_chnfifolock[i]);
++ }
++
++ sc->sc_chnlastalg = (int *) kmalloc(
++ sc->sc_num_channels * sizeof(int), GFP_KERNEL);
++ if (!sc->sc_chnlastalg)
++ goto out;
++ memset(sc->sc_chnlastalg, 0, sc->sc_num_channels * sizeof(int));
++
++ sc->sc_chnfifo = (struct desc_cryptop_pair **) kmalloc(
++ sc->sc_num_channels * sizeof(struct desc_cryptop_pair *),
++ GFP_KERNEL);
++ if (!sc->sc_chnfifo)
++ goto out;
++ for (i = 0; i < sc->sc_num_channels; i++) {
++ sc->sc_chnfifo[i] = (struct desc_cryptop_pair *) kmalloc(
++ sc->sc_chfifo_len * sizeof(struct desc_cryptop_pair),
++ GFP_KERNEL);
++ if (!sc->sc_chnfifo[i])
++ goto out;
++ memset(sc->sc_chnfifo[i], 0,
++ sc->sc_chfifo_len * sizeof(struct desc_cryptop_pair));
++ }
++
++ /* reset and initialize the SEC h/w device */
++ talitos_reset_device(sc);
++ talitos_init_device(sc);
++
++ sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
++ if (sc->sc_cid < 0) {
++ printk(KERN_ERR "%s: could not get crypto driver id\n",
++ device_get_nameunit(sc->sc_cdev));
++ goto out;
++ }
++
++ /* register algorithms with the framework */
++ printk("%s:", device_get_nameunit(sc->sc_cdev));
++
++ if (sc->sc_exec_units & TALITOS_HAS_EU_RNG) {
++ printk(" rng");
++#ifdef CONFIG_OCF_RANDOMHARVEST
++ talitos_rng_init(sc);
++ crypto_rregister(sc->sc_cid, talitos_read_random, sc);
++#endif
++ }
++ if (sc->sc_exec_units & TALITOS_HAS_EU_DEU) {
++ printk(" des/3des");
++ crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
++ crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0);
++ }
++ if (sc->sc_exec_units & TALITOS_HAS_EU_AESU) {
++ printk(" aes");
++ crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
++ }
++ if (sc->sc_exec_units & TALITOS_HAS_EU_MDEU) {
++ printk(" md5");
++ crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0);
++ /* HMAC support only with IPsec for now */
++ crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
++ printk(" sha1");
++ crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0);
++ /* HMAC support only with IPsec for now */
++ crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
++ }
++ printk("\n");
++ return 0;
++
++out:
++#ifndef CONFIG_PPC_MERGE
++ talitos_remove(pdev);
++#endif
++ return -ENOMEM;
++}
++
++#ifdef CONFIG_PPC_MERGE
++static int talitos_remove(struct of_device *ofdev)
++#else
++static int talitos_remove(struct platform_device *pdev)
++#endif
++{
++#ifdef CONFIG_PPC_MERGE
++ struct talitos_softc *sc = dev_get_drvdata(&ofdev->dev);
++#else
++ struct talitos_softc *sc = platform_get_drvdata(pdev);
++#endif
++ int i;
++
++ DPRINTF("%s()\n", __FUNCTION__);
++ if (sc->sc_cid >= 0)
++ crypto_unregister_all(sc->sc_cid);
++ if (sc->sc_chnfifo) {
++ for (i = 0; i < sc->sc_num_channels; i++)
++ if (sc->sc_chnfifo[i])
++ kfree(sc->sc_chnfifo[i]);
++ kfree(sc->sc_chnfifo);
++ }
++ if (sc->sc_chnlastalg)
++ kfree(sc->sc_chnlastalg);
++ if (sc->sc_chnfifolock)
++ kfree(sc->sc_chnfifolock);
++ if (sc->sc_irq != -1)
++ free_irq(sc->sc_irq, sc);
++ if (sc->sc_base_addr)
++ iounmap((void *) sc->sc_base_addr);
++ kfree(sc);
++ return 0;
++}
++
++#ifdef CONFIG_PPC_MERGE
++static struct of_device_id talitos_match[] = {
++ {
++ .type = "crypto",
++ .compatible = "talitos",
++ },
++ {},
++};
++
++MODULE_DEVICE_TABLE(of, talitos_match);
++
++static struct of_platform_driver talitos_driver = {
++ .name = DRV_NAME,
++ .match_table = talitos_match,
++ .probe = talitos_probe,
++ .remove = talitos_remove,
++};
++
++static int __init talitos_init(void)
++{
++ return of_register_platform_driver(&talitos_driver);
++}
++
++static void __exit talitos_exit(void)
++{
++ of_unregister_platform_driver(&talitos_driver);
++}
++#else
++/* Structure for a platform device driver */
++static struct platform_driver talitos_driver = {
++ .probe = talitos_probe,
++ .remove = talitos_remove,
++ .driver = {
++ .name = "fsl-sec2",
++ }
++};
++
++static int __init talitos_init(void)
++{
++ return platform_driver_register(&talitos_driver);
++}
++
++static void __exit talitos_exit(void)
++{
++ platform_driver_unregister(&talitos_driver);
++}
++#endif
++
++module_init(talitos_init);
++module_exit(talitos_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
++MODULE_AUTHOR("kim.phillips@freescale.com");
++MODULE_DESCRIPTION("OCF driver for Freescale SEC (talitos)");
+diff -Nur linux-2.6.30.orig/crypto/ocf/talitos/talitos_dev.h linux-2.6.30/crypto/ocf/talitos/talitos_dev.h
+--- linux-2.6.30.orig/crypto/ocf/talitos/talitos_dev.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/talitos/talitos_dev.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,277 @@
++/*
++ * Freescale SEC (talitos) device dependent data structures
++ *
++ * Copyright (c) 2006 Freescale Semiconductor, Inc.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ */
++
++/* device ID register values */
++#define TALITOS_ID_SEC_2_0 0x40
++#define TALITOS_ID_SEC_2_1 0x40 /* cross ref with IP block revision reg */
++
++/*
++ * following num_channels, channel-fifo-depth, exec-unit-mask, and
++ * descriptor-types-mask are for forward-compatibility with openfirmware
++ * flat device trees
++ */
++
++/*
++ * num_channels : the number of channels available in each SEC version.
++ */
++
++/* n.b. this driver requires these values be a power of 2 */
++#define TALITOS_NCHANNELS_SEC_1_0 4
++#define TALITOS_NCHANNELS_SEC_1_2 1
++#define TALITOS_NCHANNELS_SEC_2_0 4
++#define TALITOS_NCHANNELS_SEC_2_01 4
++#define TALITOS_NCHANNELS_SEC_2_1 4
++#define TALITOS_NCHANNELS_SEC_2_4 4
++
++/*
++ * channel-fifo-depth : The number of descriptor
++ * pointers a channel fetch fifo can hold.
++ */
++#define TALITOS_CHFIFOLEN_SEC_1_0 1
++#define TALITOS_CHFIFOLEN_SEC_1_2 1
++#define TALITOS_CHFIFOLEN_SEC_2_0 24
++#define TALITOS_CHFIFOLEN_SEC_2_01 24
++#define TALITOS_CHFIFOLEN_SEC_2_1 24
++#define TALITOS_CHFIFOLEN_SEC_2_4 24
++
++/*
++ * exec-unit-mask : The bitmask representing what Execution Units (EUs)
++ * are available. EU information should be encoded following the SEC's
++ * EU_SEL0 bitfield documentation, i.e. as follows:
++ *
++ * bit 31 = set if SEC permits no-EU selection (should be always set)
++ * bit 30 = set if SEC has the ARC4 EU (AFEU)
++ * bit 29 = set if SEC has the des/3des EU (DEU)
++ * bit 28 = set if SEC has the message digest EU (MDEU)
++ * bit 27 = set if SEC has the random number generator EU (RNG)
++ * bit 26 = set if SEC has the public key EU (PKEU)
++ * bit 25 = set if SEC has the aes EU (AESU)
++ * bit 24 = set if SEC has the Kasumi EU (KEU)
++ *
++ */
++#define TALITOS_HAS_EU_NONE (1<<0)
++#define TALITOS_HAS_EU_AFEU (1<<1)
++#define TALITOS_HAS_EU_DEU (1<<2)
++#define TALITOS_HAS_EU_MDEU (1<<3)
++#define TALITOS_HAS_EU_RNG (1<<4)
++#define TALITOS_HAS_EU_PKEU (1<<5)
++#define TALITOS_HAS_EU_AESU (1<<6)
++#define TALITOS_HAS_EU_KEU (1<<7)
++
++/* the corresponding masks for each SEC version */
++#define TALITOS_HAS_EUS_SEC_1_0 0x7f
++#define TALITOS_HAS_EUS_SEC_1_2 0x4d
++#define TALITOS_HAS_EUS_SEC_2_0 0x7f
++#define TALITOS_HAS_EUS_SEC_2_01 0x7f
++#define TALITOS_HAS_EUS_SEC_2_1 0xff
++#define TALITOS_HAS_EUS_SEC_2_4 0x7f
++
++/*
++ * descriptor-types-mask : The bitmask representing what descriptors
++ * are available. Descriptor type information should be encoded
++ * following the SEC's Descriptor Header Dword DESC_TYPE field
++ * documentation, i.e. as follows:
++ *
++ * bit 0 = set if SEC supports the aesu_ctr_nonsnoop desc. type
++ * bit 1 = set if SEC supports the ipsec_esp descriptor type
++ * bit 2 = set if SEC supports the common_nonsnoop desc. type
++ * bit 3 = set if SEC supports the 802.11i AES ccmp desc. type
++ * bit 4 = set if SEC supports the hmac_snoop_no_afeu desc. type
++ * bit 5 = set if SEC supports the srtp descriptor type
++ * bit 6 = set if SEC supports the non_hmac_snoop_no_afeu desc.type
++ * bit 7 = set if SEC supports the pkeu_assemble descriptor type
++ * bit 8 = set if SEC supports the aesu_key_expand_output desc.type
++ * bit 9 = set if SEC supports the pkeu_ptmul descriptor type
++ * bit 10 = set if SEC supports the common_nonsnoop_afeu desc. type
++ * bit 11 = set if SEC supports the pkeu_ptadd_dbl descriptor type
++ *
++ * ..and so on and so forth.
++ */
++#define TALITOS_HAS_DT_AESU_CTR_NONSNOOP (1<<0)
++#define TALITOS_HAS_DT_IPSEC_ESP (1<<1)
++#define TALITOS_HAS_DT_COMMON_NONSNOOP (1<<2)
++
++/* the corresponding masks for each SEC version */
++#define TALITOS_HAS_DESCTYPES_SEC_2_0 0x01010ebf
++#define TALITOS_HAS_DESCTYPES_SEC_2_1 0x012b0ebf
++
++/*
++ * a TALITOS_xxx_HI address points to the low data bits (32-63) of the register
++ */
++
++/* global register offset addresses */
++#define TALITOS_ID 0x1020
++#define TALITOS_ID_HI 0x1024
++#define TALITOS_MCR 0x1030 /* master control register */
++#define TALITOS_MCR_HI 0x1038 /* master control register */
++#define TALITOS_MCR_SWR 0x1
++#define TALITOS_IMR 0x1008 /* interrupt mask register */
++#define TALITOS_IMR_ALL 0x00010fff /* enable all interrupts mask */
++#define TALITOS_IMR_ERRONLY 0x00010aaa /* enable error interrupts */
++#define TALITOS_IMR_HI 0x100C /* interrupt mask register */
++#define TALITOS_IMR_HI_ALL 0x00323333 /* enable all interrupts mask */
++#define TALITOS_IMR_HI_ERRONLY 0x00222222 /* enable error interrupts */
++#define TALITOS_ISR 0x1010 /* interrupt status register */
++#define TALITOS_ISR_ERROR 0x00010faa /* errors mask */
++#define TALITOS_ISR_DONE 0x00000055 /* channel(s) done mask */
++#define TALITOS_ISR_HI 0x1014 /* interrupt status register */
++#define TALITOS_ICR 0x1018 /* interrupt clear register */
++#define TALITOS_ICR_HI 0x101C /* interrupt clear register */
++
++/* channel register address stride */
++#define TALITOS_CH_OFFSET 0x100
++
++/* channel register offset addresses and bits */
++#define TALITOS_CH_CCCR 0x1108 /* Crypto-Channel Config Register */
++#define TALITOS_CH_CCCR_RESET 0x1 /* Channel Reset bit */
++#define TALITOS_CH_CCCR_HI 0x110c /* Crypto-Channel Config Register */
++#define TALITOS_CH_CCCR_HI_CDWE 0x10 /* Channel done writeback enable bit */
++#define TALITOS_CH_CCCR_HI_NT 0x4 /* Notification type bit */
++#define TALITOS_CH_CCCR_HI_CDIE 0x2 /* Channel Done Interrupt Enable bit */
++#define TALITOS_CH_CCPSR 0x1110 /* Crypto-Channel Pointer Status Reg */
++#define TALITOS_CH_CCPSR_HI 0x1114 /* Crypto-Channel Pointer Status Reg */
++#define TALITOS_CH_FF 0x1148 /* Fetch FIFO */
++#define TALITOS_CH_FF_HI 0x114c /* Fetch FIFO's FETCH_ADRS */
++#define TALITOS_CH_CDPR 0x1140 /* Crypto-Channel Pointer Status Reg */
++#define TALITOS_CH_CDPR_HI 0x1144 /* Crypto-Channel Pointer Status Reg */
++#define TALITOS_CH_DESCBUF 0x1180 /* (thru 11bf) Crypto-Channel
++ * Descriptor Buffer (debug) */
++
++/* execution unit register offset addresses and bits */
++#define TALITOS_DEUSR 0x2028 /* DEU status register */
++#define TALITOS_DEUSR_HI 0x202c /* DEU status register */
++#define TALITOS_DEUISR 0x2030 /* DEU interrupt status register */
++#define TALITOS_DEUISR_HI 0x2034 /* DEU interrupt status register */
++#define TALITOS_DEUICR 0x2038 /* DEU interrupt control register */
++#define TALITOS_DEUICR_HI 0x203c /* DEU interrupt control register */
++#define TALITOS_AESUISR 0x4030 /* AESU interrupt status register */
++#define TALITOS_AESUISR_HI 0x4034 /* AESU interrupt status register */
++#define TALITOS_AESUICR 0x4038 /* AESU interrupt control register */
++#define TALITOS_AESUICR_HI 0x403c /* AESU interrupt control register */
++#define TALITOS_MDEUISR 0x6030 /* MDEU interrupt status register */
++#define TALITOS_MDEUISR_HI 0x6034 /* MDEU interrupt status register */
++#define TALITOS_RNGSR 0xa028 /* RNG status register */
++#define TALITOS_RNGSR_HI 0xa02c /* RNG status register */
++#define TALITOS_RNGSR_HI_RD 0x1 /* RNG Reset done */
++#define TALITOS_RNGSR_HI_OFL 0xff0000/* number of dwords in RNG output FIFO*/
++#define TALITOS_RNGDSR 0xa010 /* RNG data size register */
++#define TALITOS_RNGDSR_HI 0xa014 /* RNG data size register */
++#define TALITOS_RNG_FIFO 0xa800 /* RNG FIFO - pool of random numbers */
++#define TALITOS_RNGISR 0xa030 /* RNG Interrupt status register */
++#define TALITOS_RNGISR_HI 0xa034 /* RNG Interrupt status register */
++#define TALITOS_RNGRCR 0xa018 /* RNG Reset control register */
++#define TALITOS_RNGRCR_HI 0xa01c /* RNG Reset control register */
++#define TALITOS_RNGRCR_HI_SR 0x1 /* RNG RNGRCR:Software Reset */
++
++/* descriptor pointer entry */
++struct talitos_desc_ptr {
++ u16 len; /* length */
++ u8 extent; /* jump (to s/g link table) and extent */
++ u8 res; /* reserved */
++ u32 ptr; /* pointer */
++};
++
++/* descriptor */
++struct talitos_desc {
++ u32 hdr; /* header */
++ u32 res; /* reserved */
++ struct talitos_desc_ptr ptr[7]; /* ptr/len pair array */
++};
++
++/* talitos descriptor header (hdr) bits */
++
++/* primary execution unit select */
++#define TALITOS_SEL0_AFEU 0x10000000
++#define TALITOS_SEL0_DEU 0x20000000
++#define TALITOS_SEL0_MDEU 0x30000000
++#define TALITOS_SEL0_RNG 0x40000000
++#define TALITOS_SEL0_PKEU 0x50000000
++#define TALITOS_SEL0_AESU 0x60000000
++
++/* primary execution unit mode (MODE0) and derivatives */
++#define TALITOS_MODE0_AESU_CBC 0x00200000
++#define TALITOS_MODE0_AESU_ENC 0x00100000
++#define TALITOS_MODE0_DEU_CBC 0x00400000
++#define TALITOS_MODE0_DEU_3DES 0x00200000
++#define TALITOS_MODE0_DEU_ENC 0x00100000
++#define TALITOS_MODE0_MDEU_INIT 0x01000000 /* init starting regs */
++#define TALITOS_MODE0_MDEU_HMAC 0x00800000
++#define TALITOS_MODE0_MDEU_PAD 0x00400000 /* PD */
++#define TALITOS_MODE0_MDEU_MD5 0x00200000
++#define TALITOS_MODE0_MDEU_SHA256 0x00100000
++#define TALITOS_MODE0_MDEU_SHA1 0x00000000 /* SHA-160 */
++#define TALITOS_MODE0_MDEU_MD5_HMAC \
++ (TALITOS_MODE0_MDEU_MD5 | TALITOS_MODE0_MDEU_HMAC)
++#define TALITOS_MODE0_MDEU_SHA256_HMAC \
++ (TALITOS_MODE0_MDEU_SHA256 | TALITOS_MODE0_MDEU_HMAC)
++#define TALITOS_MODE0_MDEU_SHA1_HMAC \
++ (TALITOS_MODE0_MDEU_SHA1 | TALITOS_MODE0_MDEU_HMAC)
++
++/* secondary execution unit select (SEL1) */
++/* it's MDEU or nothing */
++#define TALITOS_SEL1_MDEU 0x00030000
++
++/* secondary execution unit mode (MODE1) and derivatives */
++#define TALITOS_MODE1_MDEU_INIT 0x00001000 /* init starting regs */
++#define TALITOS_MODE1_MDEU_HMAC 0x00000800
++#define TALITOS_MODE1_MDEU_PAD 0x00000400 /* PD */
++#define TALITOS_MODE1_MDEU_MD5 0x00000200
++#define TALITOS_MODE1_MDEU_SHA256 0x00000100
++#define TALITOS_MODE1_MDEU_SHA1 0x00000000 /* SHA-160 */
++#define TALITOS_MODE1_MDEU_MD5_HMAC \
++ (TALITOS_MODE1_MDEU_MD5 | TALITOS_MODE1_MDEU_HMAC)
++#define TALITOS_MODE1_MDEU_SHA256_HMAC \
++ (TALITOS_MODE1_MDEU_SHA256 | TALITOS_MODE1_MDEU_HMAC)
++#define TALITOS_MODE1_MDEU_SHA1_HMAC \
++ (TALITOS_MODE1_MDEU_SHA1 | TALITOS_MODE1_MDEU_HMAC)
++
++/* direction of overall data flow (DIR) */
++#define TALITOS_DIR_OUTBOUND 0x00000000
++#define TALITOS_DIR_INBOUND 0x00000002
++
++/* done notification (DN) */
++#define TALITOS_DONE_NOTIFY 0x00000001
++
++/* descriptor types */
++/* odd numbers here are valid on SEC2 and greater only (e.g. ipsec_esp) */
++#define TD_TYPE_AESU_CTR_NONSNOOP (0 << 3)
++#define TD_TYPE_IPSEC_ESP (1 << 3)
++#define TD_TYPE_COMMON_NONSNOOP_NO_AFEU (2 << 3)
++#define TD_TYPE_HMAC_SNOOP_NO_AFEU (4 << 3)
++
++#define TALITOS_HDR_DONE_BITS 0xff000000
++
++#define DPRINTF(a...) do { \
++ if (debug) { \
++ printk("%s: ", sc ? \
++ device_get_nameunit(sc->sc_cdev) : "talitos"); \
++ printk(a); \
++ } \
++ } while (0)
+diff -Nur linux-2.6.30.orig/crypto/ocf/talitos/talitos_soft.h linux-2.6.30/crypto/ocf/talitos/talitos_soft.h
+--- linux-2.6.30.orig/crypto/ocf/talitos/talitos_soft.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/talitos/talitos_soft.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,77 @@
++/*
++ * Freescale SEC data structures for integration with ocf-linux
++ *
++ * Copyright (c) 2006 Freescale Semiconductor, Inc.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ *
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++/*
++ * paired descriptor and associated crypto operation
++ */
++struct desc_cryptop_pair {
++ struct talitos_desc cf_desc; /* descriptor ptr */
++ struct cryptop *cf_crp; /* cryptop ptr */
++};
++
++/*
++ * Holds data specific to a single talitos device.
++ */
++struct talitos_softc {
++ softc_device_decl sc_cdev;
++ struct platform_device *sc_dev; /* device backpointer */
++ ocf_iomem_t sc_base_addr;
++ int sc_irq;
++ int sc_num; /* if we have multiple chips */
++ int32_t sc_cid; /* crypto tag */
++ u64 sc_chiprev; /* major/minor chip revision */
++ int sc_nsessions;
++ struct talitos_session *sc_sessions;
++ int sc_num_channels;/* number of crypto channels */
++ int sc_chfifo_len; /* channel fetch fifo len */
++ int sc_exec_units; /* execution units mask */
++ int sc_desc_types; /* descriptor types mask */
++ /*
++ * mutual exclusion for intra-channel resources, e.g. fetch fifos
++ * the last entry is a meta-channel lock used by the channel scheduler
++ */
++ spinlock_t *sc_chnfifolock;
++ /* sc_chnlastalgo contains last algorithm for that channel */
++ int *sc_chnlastalg;
++ /* sc_chnfifo holds pending descriptor--crypto operation pairs */
++ struct desc_cryptop_pair **sc_chnfifo;
++};
++
++struct talitos_session {
++ u_int32_t ses_used;
++ u_int32_t ses_klen; /* key length in bits */
++ u_int32_t ses_key[8]; /* DES/3DES/AES key */
++ u_int32_t ses_hmac[5]; /* hmac inner state */
++ u_int32_t ses_hmac_len; /* hmac length */
++ u_int32_t ses_iv[4]; /* DES/3DES/AES iv */
++ u_int32_t ses_mlen; /* desired hash result len (12=ipsec or 16) */
++};
++
++#define TALITOS_SESSION(sid) ((sid) & 0x0fffffff)
++#define TALITOS_SID(crd, sesn) (((crd) << 28) | ((sesn) & 0x0fffffff))
+diff -Nur linux-2.6.30.orig/crypto/ocf/uio.h linux-2.6.30/crypto/ocf/uio.h
+--- linux-2.6.30.orig/crypto/ocf/uio.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/crypto/ocf/uio.h 2009-06-11 10:55:27.000000000 +0200
+@@ -0,0 +1,54 @@
++#ifndef _OCF_UIO_H_
++#define _OCF_UIO_H_
++
++#include <linux/uio.h>
++
++/*
++ * The linux uio.h doesn't have all we need. To be fully api compatible
++ * with the BSD cryptodev, we need to keep this around. Perhaps this can
++ * be moved back into the linux/uio.h
++ *
++ * Linux port done by David McCullough <david_mccullough@securecomputing.com>
++ * Copyright (C) 2006-2007 David McCullough
++ * Copyright (C) 2004-2005 Intel Corporation.
++ *
++ * LICENSE TERMS
++ *
++ * The free distribution and use of this software in both source and binary
++ * form is allowed (with or without changes) provided that:
++ *
++ * 1. distributions of this source code include the above copyright
++ * notice, this list of conditions and the following disclaimer;
++ *
++ * 2. distributions in binary form include the above copyright
++ * notice, this list of conditions and the following disclaimer
++ * in the documentation and/or other associated materials;
++ *
++ * 3. the copyright holder's name is not used to endorse products
++ * built using this software without specific written permission.
++ *
++ * ALTERNATIVELY, provided that this notice is retained in full, this product
++ * may be distributed under the terms of the GNU General Public License (GPL),
++ * in which case the provisions of the GPL apply INSTEAD OF those given above.
++ *
++ * DISCLAIMER
++ *
++ * This software is provided 'as is' with no explicit or implied warranties
++ * in respect of its properties, including, but not limited to, correctness
++ * and/or fitness for purpose.
++ * ---------------------------------------------------------------------------
++ */
++
++struct uio {
++ struct iovec *uio_iov;
++ int uio_iovcnt;
++ off_t uio_offset;
++ int uio_resid;
++#if 0
++ enum uio_seg uio_segflg;
++ enum uio_rw uio_rw;
++ struct thread *uio_td;
++#endif
++};
++
++#endif
+diff -Nur linux-2.6.30.orig/drivers/char/random.c linux-2.6.30/drivers/char/random.c
+--- linux-2.6.30.orig/drivers/char/random.c 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/drivers/char/random.c 2009-06-11 10:55:27.000000000 +0200
+@@ -129,6 +129,9 @@
+ * unsigned int value);
+ * void add_interrupt_randomness(int irq);
+ *
++ * void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
++ * int random_input_wait(void);
++ *
+ * add_input_randomness() uses the input layer interrupt timing, as well as
+ * the event type information from the hardware.
+ *
+@@ -140,6 +143,13 @@
+ * a better measure, since the timing of the disk interrupts are more
+ * unpredictable.
+ *
++ * random_input_words() just provides a raw block of entropy to the input
++ * pool, such as from a hardware entropy generator.
++ *
++ * random_input_wait() suspends the caller until such time as the
++ * entropy pool falls below the write threshold, and returns a count of how
++ * much entropy (in bits) is needed to sustain the pool.
++ *
+ * All of these routines try to estimate how many bits of randomness a
+ * particular randomness source. They do this by keeping track of the
+ * first and second order deltas of the event timings.
+@@ -712,6 +722,61 @@
+ }
+ #endif
+
++/*
++ * random_input_words - add bulk entropy to pool
++ *
++ * @buf: buffer to add
++ * @wordcount: number of __u32 words to add
++ * @ent_count: total amount of entropy (in bits) to credit
++ *
++ * this provides bulk input of entropy to the input pool
++ *
++ */
++void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
++{
++ mix_pool_bytes(&input_pool, buf, wordcount*4);
++
++ credit_entropy_bits(&input_pool, ent_count);
++
++ DEBUG_ENT("crediting %d bits => %d\n",
++ ent_count, input_pool.entropy_count);
++ /*
++ * Wake up waiting processes if we have enough
++ * entropy.
++ */
++ if (input_pool.entropy_count >= random_read_wakeup_thresh)
++ wake_up_interruptible(&random_read_wait);
++}
++EXPORT_SYMBOL(random_input_words);
++
++/*
++ * random_input_wait - wait until random needs entropy
++ *
++ * this function sleeps until the /dev/random subsystem actually
++ * needs more entropy, and then return the amount of entropy
++ * that it would be nice to have added to the system.
++ */
++int random_input_wait(void)
++{
++ int count;
++
++ wait_event_interruptible(random_write_wait,
++ input_pool.entropy_count < random_write_wakeup_thresh);
++
++ count = random_write_wakeup_thresh - input_pool.entropy_count;
++
++ /* likely we got woken up due to a signal */
++ if (count <= 0) count = random_read_wakeup_thresh;
++
++ DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
++ count,
++ input_pool.entropy_count, random_write_wakeup_thresh);
++
++ return count;
++}
++EXPORT_SYMBOL(random_input_wait);
++
++
+ #define EXTRACT_SIZE 10
+
+ /*********************************************************************
+diff -Nur linux-2.6.30.orig/fs/fcntl.c linux-2.6.30/fs/fcntl.c
+--- linux-2.6.30.orig/fs/fcntl.c 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/fs/fcntl.c 2009-06-11 10:55:27.000000000 +0200
+@@ -142,6 +142,7 @@
+ }
+ return ret;
+ }
++EXPORT_SYMBOL(sys_dup);
+
+ #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
+
+diff -Nur linux-2.6.30.orig/include/linux/miscdevice.h linux-2.6.30/include/linux/miscdevice.h
+--- linux-2.6.30.orig/include/linux/miscdevice.h 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/include/linux/miscdevice.h 2009-06-11 10:55:27.000000000 +0200
+@@ -12,6 +12,7 @@
+ #define APOLLO_MOUSE_MINOR 7
+ #define PC110PAD_MINOR 9
+ /*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
++#define CRYPTODEV_MINOR 70 /* /dev/crypto */
+ #define WATCHDOG_MINOR 130 /* Watchdog timer */
+ #define TEMP_MINOR 131 /* Temperature Sensor */
+ #define RTC_MINOR 135
+diff -Nur linux-2.6.30.orig/include/linux/random.h linux-2.6.30/include/linux/random.h
+--- linux-2.6.30.orig/include/linux/random.h 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/include/linux/random.h 2009-06-11 10:55:27.000000000 +0200
+@@ -34,6 +34,30 @@
+ /* Clear the entropy pool and associated counters. (Superuser only.) */
+ #define RNDCLEARPOOL _IO( 'R', 0x06 )
+
++#ifdef CONFIG_FIPS_RNG
++
++/* Size of seed value - equal to AES blocksize */
++#define AES_BLOCK_SIZE_BYTES 16
++#define SEED_SIZE_BYTES AES_BLOCK_SIZE_BYTES
++/* Size of AES key */
++#define KEY_SIZE_BYTES 16
++
++/* ioctl() structure used by FIPS 140-2 Tests */
++struct rand_fips_test {
++ unsigned char key[KEY_SIZE_BYTES]; /* Input */
++ unsigned char datetime[SEED_SIZE_BYTES]; /* Input */
++ unsigned char seed[SEED_SIZE_BYTES]; /* Input */
++ unsigned char result[SEED_SIZE_BYTES]; /* Output */
++};
++
++/* FIPS 140-2 RNG Variable Seed Test. (Superuser only.) */
++#define RNDFIPSVST _IOWR('R', 0x10, struct rand_fips_test)
++
++/* FIPS 140-2 RNG Monte Carlo Test. (Superuser only.) */
++#define RNDFIPSMCT _IOWR('R', 0x11, struct rand_fips_test)
++
++#endif /* #ifdef CONFIG_FIPS_RNG */
++
+ struct rand_pool_info {
+ int entropy_count;
+ int buf_size;
+@@ -50,6 +74,10 @@
+ unsigned int value);
+ extern void add_interrupt_randomness(int irq);
+
++extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
++extern int random_input_wait(void);
++#define HAS_RANDOM_INPUT_WAIT 1
++
+ extern void get_random_bytes(void *buf, int nbytes);
+ void generate_random_uuid(unsigned char uuid_out[16]);
+
diff --git a/target/linux/patches/2.6.33/startup.patch b/target/linux/patches/2.6.33/startup.patch
new file mode 100644
index 000000000..1e50e6312
--- /dev/null
+++ b/target/linux/patches/2.6.33/startup.patch
@@ -0,0 +1,20 @@
+diff -Nur linux-2.6.32.orig/init/main.c linux-2.6.32/init/main.c
+--- linux-2.6.32.orig/init/main.c 2009-12-03 04:51:21.000000000 +0100
++++ linux-2.6.32/init/main.c 2010-01-31 11:01:41.154334301 +0100
+@@ -814,6 +814,8 @@
+ if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
+ printk(KERN_WARNING "Warning: unable to open an initial console.\n");
+
++ printk(KERN_WARNING "Starting Linux (build with OpenADK).\n");
++
+ (void) sys_dup(0);
+ (void) sys_dup(0);
+
+@@ -836,6 +838,7 @@
+ printk(KERN_WARNING "Failed to execute %s. Attempting "
+ "defaults...\n", execute_command);
+ }
++ run_init_process("/init");
+ run_init_process("/sbin/init");
+ run_init_process("/etc/init");
+ run_init_process("/bin/init");
diff --git a/target/linux/patches/2.6.33/swconfig.patch b/target/linux/patches/2.6.33/swconfig.patch
new file mode 100644
index 000000000..3297bb116
--- /dev/null
+++ b/target/linux/patches/2.6.33/swconfig.patch
@@ -0,0 +1,1075 @@
+diff -Nur linux-2.6.30.orig/drivers/net/phy/Kconfig linux-2.6.30/drivers/net/phy/Kconfig
+--- linux-2.6.30.orig/drivers/net/phy/Kconfig 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/drivers/net/phy/Kconfig 2009-06-11 09:22:50.000000000 +0200
+@@ -13,6 +13,12 @@
+
+ if PHYLIB
+
++config SWCONFIG
++ tristate "Switch configuration API"
++ ---help---
++ Switch configuration API using netlink. This allows
++ you to configure the VLAN features of certain switches.
++
+ comment "MII PHY device drivers"
+
+ config MARVELL_PHY
+diff -Nur linux-2.6.30.orig/drivers/net/phy/Makefile linux-2.6.30/drivers/net/phy/Makefile
+--- linux-2.6.30.orig/drivers/net/phy/Makefile 2009-06-10 05:05:27.000000000 +0200
++++ linux-2.6.30/drivers/net/phy/Makefile 2009-06-11 09:22:50.000000000 +0200
+@@ -3,6 +3,7 @@
+ libphy-objs := phy.o phy_device.o mdio_bus.o
+
+ obj-$(CONFIG_PHYLIB) += libphy.o
++obj-$(CONFIG_SWCONFIG) += swconfig.o
+ obj-$(CONFIG_MARVELL_PHY) += marvell.o
+ obj-$(CONFIG_DAVICOM_PHY) += davicom.o
+ obj-$(CONFIG_CICADA_PHY) += cicada.o
+diff -Nur linux-2.6.30.orig/drivers/net/phy/swconfig.c linux-2.6.30/drivers/net/phy/swconfig.c
+--- linux-2.6.30.orig/drivers/net/phy/swconfig.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/drivers/net/phy/swconfig.c 2009-06-11 09:22:50.000000000 +0200
+@@ -0,0 +1,872 @@
++/*
++ * swconfig.c: Switch configuration API
++ *
++ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version 2
++ * of the License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/types.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/if.h>
++#include <linux/if_ether.h>
++#include <linux/capability.h>
++#include <linux/skbuff.h>
++#include <linux/switch.h>
++
++//#define DEBUG 1
++#ifdef DEBUG
++#define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__)
++#else
++#define DPRINTF(...) do {} while(0)
++#endif
++
++MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
++MODULE_LICENSE("GPL");
++
++static int swdev_id = 0;
++static struct list_head swdevs;
++static spinlock_t swdevs_lock = SPIN_LOCK_UNLOCKED;
++struct swconfig_callback;
++
++struct swconfig_callback
++{
++ struct sk_buff *msg;
++ struct genlmsghdr *hdr;
++ struct genl_info *info;
++ int cmd;
++
++ /* callback for filling in the message data */
++ int (*fill)(struct swconfig_callback *cb, void *arg);
++
++ /* callback for closing the message before sending it */
++ int (*close)(struct swconfig_callback *cb, void *arg);
++
++ struct nlattr *nest[4];
++ int args[4];
++};
++
++/* defaults */
++
++static int
++swconfig_get_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
++{
++ int ret;
++ if (val->port_vlan >= dev->vlans)
++ return -EINVAL;
++
++ if (!dev->get_vlan_ports)
++ return -EOPNOTSUPP;
++
++ ret = dev->get_vlan_ports(dev, val);
++ printk("SET PORTS %d\n", val->len);
++ return ret;
++}
++
++static int
++swconfig_set_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
++{
++ int i;
++
++ if (val->port_vlan >= dev->vlans)
++ return -EINVAL;
++
++ /* validate ports */
++ if (val->len > dev->ports)
++ return -EINVAL;
++
++ for (i = 0; i < val->len; i++) {
++ if (val->value.ports[i].id >= dev->ports)
++ return -EINVAL;
++ }
++
++ if (!dev->set_vlan_ports)
++ return -EOPNOTSUPP;
++
++ printk("SET PORTS %d\n", val->len);
++ return dev->set_vlan_ports(dev, val);
++}
++
++static int
++swconfig_apply_config(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
++{
++ /* don't complain if not supported by the switch driver */
++ if (!dev->apply_config)
++ return 0;
++
++ return dev->apply_config(dev);
++}
++
++
++enum global_defaults {
++ GLOBAL_APPLY,
++};
++
++enum vlan_defaults {
++ VLAN_PORTS,
++};
++
++enum port_defaults {
++ PORT_LINK,
++};
++
++static struct switch_attr default_global[] = {
++ [GLOBAL_APPLY] = {
++ .type = SWITCH_TYPE_NOVAL,
++ .name = "apply",
++ .description = "Activate changes in the hardware",
++ .set = swconfig_apply_config,
++ }
++};
++
++static struct switch_attr default_port[] = {
++ [PORT_LINK] = {
++ .type = SWITCH_TYPE_INT,
++ .name = "link",
++ .description = "Current link speed",
++ }
++};
++
++static struct switch_attr default_vlan[] = {
++ [VLAN_PORTS] = {
++ .type = SWITCH_TYPE_PORTS,
++ .name = "ports",
++ .description = "VLAN port mapping",
++ .set = swconfig_set_vlan_ports,
++ .get = swconfig_get_vlan_ports,
++ },
++};
++
++
++static void swconfig_defaults_init(struct switch_dev *dev)
++{
++ dev->def_global = 0;
++ dev->def_vlan = 0;
++ dev->def_port = 0;
++
++ if (dev->get_vlan_ports || dev->set_vlan_ports)
++ set_bit(VLAN_PORTS, &dev->def_vlan);
++
++ /* always present, can be no-op */
++ set_bit(GLOBAL_APPLY, &dev->def_global);
++}
++
++
++static struct genl_family switch_fam = {
++ .id = GENL_ID_GENERATE,
++ .name = "switch",
++ .hdrsize = 0,
++ .version = 1,
++ .maxattr = SWITCH_ATTR_MAX,
++};
++
++static const struct nla_policy switch_policy[SWITCH_ATTR_MAX+1] = {
++ [SWITCH_ATTR_ID] = { .type = NLA_U32 },
++ [SWITCH_ATTR_OP_ID] = { .type = NLA_U32 },
++ [SWITCH_ATTR_OP_PORT] = { .type = NLA_U32 },
++ [SWITCH_ATTR_OP_VLAN] = { .type = NLA_U32 },
++ [SWITCH_ATTR_OP_VALUE_INT] = { .type = NLA_U32 },
++ [SWITCH_ATTR_OP_VALUE_STR] = { .type = NLA_NUL_STRING },
++ [SWITCH_ATTR_OP_VALUE_PORTS] = { .type = NLA_NESTED },
++ [SWITCH_ATTR_TYPE] = { .type = NLA_U32 },
++};
++
++static const struct nla_policy port_policy[SWITCH_PORT_ATTR_MAX+1] = {
++ [SWITCH_PORT_ID] = { .type = NLA_U32 },
++ [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
++};
++
++static inline void
++swconfig_lock(void)
++{
++ spin_lock(&swdevs_lock);
++}
++
++static inline void
++swconfig_unlock(void)
++{
++ spin_unlock(&swdevs_lock);
++}
++
++static struct switch_dev *
++swconfig_get_dev(struct genl_info *info)
++{
++ struct switch_dev *dev = NULL;
++ struct switch_dev *p;
++ int id;
++
++ if (!info->attrs[SWITCH_ATTR_ID])
++ goto done;
++
++ id = nla_get_u32(info->attrs[SWITCH_ATTR_ID]);
++ swconfig_lock();
++ list_for_each_entry(p, &swdevs, dev_list) {
++ if (id != p->id)
++ continue;
++
++ dev = p;
++ break;
++ }
++ if (dev)
++ spin_lock(&dev->lock);
++ else
++ DPRINTF("device %d not found\n", id);
++ swconfig_unlock();
++done:
++ return dev;
++}
++
++static inline void
++swconfig_put_dev(struct switch_dev *dev)
++{
++ spin_unlock(&dev->lock);
++}
++
++static int
++swconfig_dump_attr(struct swconfig_callback *cb, void *arg)
++{
++ struct switch_attr *op = arg;
++ struct genl_info *info = cb->info;
++ struct sk_buff *msg = cb->msg;
++ int id = cb->args[0];
++ void *hdr;
++
++ hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
++ NLM_F_MULTI, SWITCH_CMD_NEW_ATTR);
++ if (IS_ERR(hdr))
++ return -1;
++
++ NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, id);
++ NLA_PUT_U32(msg, SWITCH_ATTR_OP_TYPE, op->type);
++ NLA_PUT_STRING(msg, SWITCH_ATTR_OP_NAME, op->name);
++ if (op->description)
++ NLA_PUT_STRING(msg, SWITCH_ATTR_OP_DESCRIPTION,
++ op->description);
++
++ return genlmsg_end(msg, hdr);
++nla_put_failure:
++ genlmsg_cancel(msg, hdr);
++ return -EMSGSIZE;
++}
++
++/* spread multipart messages across multiple message buffers */
++static int
++swconfig_send_multipart(struct swconfig_callback *cb, void *arg)
++{
++ struct genl_info *info = cb->info;
++ int restart = 0;
++ int err;
++
++ do {
++ if (!cb->msg) {
++ cb->msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
++ if (cb->msg == NULL)
++ goto error;
++ }
++
++ if (!(cb->fill(cb, arg) < 0))
++ break;
++
++ /* fill failed, check if this was already the second attempt */
++ if (restart)
++ goto error;
++
++ /* try again in a new message, send the current one */
++ restart = 1;
++ if (cb->close) {
++ if (cb->close(cb, arg) < 0)
++ goto error;
++ }
++ err = genlmsg_unicast(cb->msg, info->snd_pid);
++ cb->msg = NULL;
++ if (err < 0)
++ goto error;
++
++ } while (restart);
++
++ return 0;
++
++error:
++ if (cb->msg)
++ nlmsg_free(cb->msg);
++ return -1;
++}
++
++static int
++swconfig_list_attrs(struct sk_buff *skb, struct genl_info *info)
++{
++ struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
++ const struct switch_attrlist *alist;
++ struct switch_dev *dev;
++ struct swconfig_callback cb;
++ int err = -EINVAL;
++ int i;
++
++ /* defaults */
++ struct switch_attr *def_list;
++ unsigned long *def_active;
++ int n_def;
++
++ dev = swconfig_get_dev(info);
++ if (!dev)
++ return -EINVAL;
++
++ switch(hdr->cmd) {
++ case SWITCH_CMD_LIST_GLOBAL:
++ alist = &dev->attr_global;
++ def_list = default_global;
++ def_active = &dev->def_global;
++ n_def = ARRAY_SIZE(default_global);
++ break;
++ case SWITCH_CMD_LIST_VLAN:
++ alist = &dev->attr_vlan;
++ def_list = default_vlan;
++ def_active = &dev->def_vlan;
++ n_def = ARRAY_SIZE(default_vlan);
++ break;
++ case SWITCH_CMD_LIST_PORT:
++ alist = &dev->attr_port;
++ def_list = default_port;
++ def_active = &dev->def_port;
++ n_def = ARRAY_SIZE(default_port);
++ break;
++ default:
++ WARN_ON(1);
++ goto out;
++ }
++
++ memset(&cb, 0, sizeof(cb));
++ cb.info = info;
++ cb.fill = swconfig_dump_attr;
++ for (i = 0; i < alist->n_attr; i++) {
++ if (alist->attr[i].disabled)
++ continue;
++ cb.args[0] = i;
++ err = swconfig_send_multipart(&cb, &alist->attr[i]);
++ if (err < 0)
++ goto error;
++ }
++
++ /* defaults */
++ for (i = 0; i < n_def; i++) {
++ if (!test_bit(i, def_active))
++ continue;
++ cb.args[0] = SWITCH_ATTR_DEFAULTS_OFFSET + i;
++ err = swconfig_send_multipart(&cb, &def_list[i]);
++ if (err < 0)
++ goto error;
++ }
++ swconfig_put_dev(dev);
++
++ if (!cb.msg)
++ return 0;
++
++ return genlmsg_unicast(cb.msg, info->snd_pid);
++
++error:
++ if (cb.msg)
++ nlmsg_free(cb.msg);
++out:
++ swconfig_put_dev(dev);
++ return err;
++}
++
++static struct switch_attr *
++swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info,
++ struct switch_val *val)
++{
++ struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
++ const struct switch_attrlist *alist;
++ struct switch_attr *attr = NULL;
++ int attr_id;
++
++ /* defaults */
++ struct switch_attr *def_list;
++ unsigned long *def_active;
++ int n_def;
++
++ if (!info->attrs[SWITCH_ATTR_OP_ID])
++ goto done;
++
++ switch(hdr->cmd) {
++ case SWITCH_CMD_SET_GLOBAL:
++ case SWITCH_CMD_GET_GLOBAL:
++ alist = &dev->attr_global;
++ def_list = default_global;
++ def_active = &dev->def_global;
++ n_def = ARRAY_SIZE(default_global);
++ break;
++ case SWITCH_CMD_SET_VLAN:
++ case SWITCH_CMD_GET_VLAN:
++ alist = &dev->attr_vlan;
++ def_list = default_vlan;
++ def_active = &dev->def_vlan;
++ n_def = ARRAY_SIZE(default_vlan);
++ if (!info->attrs[SWITCH_ATTR_OP_VLAN])
++ goto done;
++ val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]);
++ break;
++ case SWITCH_CMD_SET_PORT:
++ case SWITCH_CMD_GET_PORT:
++ alist = &dev->attr_port;
++ def_list = default_port;
++ def_active = &dev->def_port;
++ n_def = ARRAY_SIZE(default_port);
++ if (!info->attrs[SWITCH_ATTR_OP_PORT])
++ goto done;
++ val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]);
++ break;
++ default:
++ WARN_ON(1);
++ goto done;
++ }
++
++ if (!alist)
++ goto done;
++
++ attr_id = nla_get_u32(info->attrs[SWITCH_ATTR_OP_ID]);
++ if (attr_id >= SWITCH_ATTR_DEFAULTS_OFFSET) {
++ attr_id -= SWITCH_ATTR_DEFAULTS_OFFSET;
++ if (attr_id >= n_def)
++ goto done;
++ if (!test_bit(attr_id, def_active))
++ goto done;
++ attr = &def_list[attr_id];
++ } else {
++ if (attr_id >= alist->n_attr)
++ goto done;
++ attr = &alist->attr[attr_id];
++ }
++
++ if (attr->disabled)
++ attr = NULL;
++
++done:
++ if (!attr)
++ DPRINTF("attribute lookup failed\n");
++ val->attr = attr;
++ return attr;
++}
++
++static int
++swconfig_parse_ports(struct sk_buff *msg, struct nlattr *head,
++ struct switch_val *val, int max)
++{
++ struct nlattr *nla;
++ int rem;
++
++ val->len = 0;
++ nla_for_each_nested(nla, head, rem) {
++ struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
++ struct switch_port *port = &val->value.ports[val->len];
++
++ if (val->len >= max)
++ return -EINVAL;
++
++ if (nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, nla,
++ port_policy))
++ return -EINVAL;
++
++ if (!tb[SWITCH_PORT_ID])
++ return -EINVAL;
++
++ port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
++ if (tb[SWITCH_PORT_FLAG_TAGGED])
++ port->flags |= (1 << SWITCH_PORT_FLAG_TAGGED);
++ val->len++;
++ }
++
++ return 0;
++}
++
++static int
++swconfig_set_attr(struct sk_buff *skb, struct genl_info *info)
++{
++ struct switch_attr *attr;
++ struct switch_dev *dev;
++ struct switch_val val;
++ int err = -EINVAL;
++
++ dev = swconfig_get_dev(info);
++ if (!dev)
++ return -EINVAL;
++
++ memset(&val, 0, sizeof(val));
++ attr = swconfig_lookup_attr(dev, info, &val);
++ if (!attr || !attr->set)
++ goto error;
++
++ val.attr = attr;
++ switch(attr->type) {
++ case SWITCH_TYPE_NOVAL:
++ break;
++ case SWITCH_TYPE_INT:
++ if (!info->attrs[SWITCH_ATTR_OP_VALUE_INT])
++ goto error;
++ val.value.i =
++ nla_get_u32(info->attrs[SWITCH_ATTR_OP_VALUE_INT]);
++ break;
++ case SWITCH_TYPE_STRING:
++ if (!info->attrs[SWITCH_ATTR_OP_VALUE_STR])
++ goto error;
++ val.value.s =
++ nla_data(info->attrs[SWITCH_ATTR_OP_VALUE_STR]);
++ break;
++ case SWITCH_TYPE_PORTS:
++ val.value.ports = dev->portbuf;
++ memset(dev->portbuf, 0,
++ sizeof(struct switch_port) * dev->ports);
++
++ /* TODO: implement multipart? */
++ if (info->attrs[SWITCH_ATTR_OP_VALUE_PORTS]) {
++ err = swconfig_parse_ports(skb,
++ info->attrs[SWITCH_ATTR_OP_VALUE_PORTS], &val, dev->ports);
++ if (err < 0)
++ goto error;
++ } else {
++ val.len = 0;
++ err = 0;
++ }
++ break;
++ default:
++ goto error;
++ }
++
++ err = attr->set(dev, attr, &val);
++error:
++ swconfig_put_dev(dev);
++ return err;
++}
++
++static int
++swconfig_close_portlist(struct swconfig_callback *cb, void *arg)
++{
++ if (cb->nest[0])
++ nla_nest_end(cb->msg, cb->nest[0]);
++ return 0;
++}
++
++static int
++swconfig_send_port(struct swconfig_callback *cb, void *arg)
++{
++ const struct switch_port *port = arg;
++ struct nlattr *p = NULL;
++
++ if (!cb->nest[0]) {
++ cb->nest[0] = nla_nest_start(cb->msg, cb->cmd);
++ if (!cb->nest[0])
++ return -1;
++ }
++
++ p = nla_nest_start(cb->msg, SWITCH_ATTR_PORT);
++ if (!p)
++ goto error;
++
++ NLA_PUT_U32(cb->msg, SWITCH_PORT_ID, port->id);
++ if (port->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
++ NLA_PUT_FLAG(cb->msg, SWITCH_PORT_FLAG_TAGGED);
++
++ nla_nest_end(cb->msg, p);
++ return 0;
++
++nla_put_failure:
++ nla_nest_cancel(cb->msg, p);
++error:
++ nla_nest_cancel(cb->msg, cb->nest[0]);
++ return -1;
++}
++
++static int
++swconfig_send_ports(struct sk_buff **msg, struct genl_info *info, int attr,
++ const struct switch_val *val)
++{
++ struct swconfig_callback cb;
++ int err = 0;
++ int i;
++
++ if (!val->value.ports)
++ return -EINVAL;
++
++ memset(&cb, 0, sizeof(cb));
++ cb.cmd = attr;
++ cb.msg = *msg;
++ cb.info = info;
++ cb.fill = swconfig_send_port;
++ cb.close = swconfig_close_portlist;
++
++ cb.nest[0] = nla_nest_start(cb.msg, cb.cmd);
++ for (i = 0; i < val->len; i++) {
++ err = swconfig_send_multipart(&cb, &val->value.ports[i]);
++ if (err)
++ goto done;
++ }
++ err = val->len;
++ swconfig_close_portlist(&cb, NULL);
++ *msg = cb.msg;
++
++done:
++ return err;
++}
++
++static int
++swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
++{
++ struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
++ struct switch_attr *attr;
++ struct switch_dev *dev;
++ struct sk_buff *msg = NULL;
++ struct switch_val val;
++ int err = -EINVAL;
++ int cmd = hdr->cmd;
++
++ dev = swconfig_get_dev(info);
++ if (!dev)
++ return -EINVAL;
++
++ memset(&val, 0, sizeof(val));
++ attr = swconfig_lookup_attr(dev, info, &val);
++ if (!attr || !attr->get)
++ goto error_dev;
++
++ if (attr->type == SWITCH_TYPE_PORTS) {
++ val.value.ports = dev->portbuf;
++ memset(dev->portbuf, 0,
++ sizeof(struct switch_port) * dev->ports);
++ }
++
++ err = attr->get(dev, attr, &val);
++ if (err)
++ goto error;
++
++ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
++ if (!msg)
++ goto error;
++
++ hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
++ 0, cmd);
++ if (IS_ERR(hdr))
++ goto nla_put_failure;
++
++ switch(attr->type) {
++ case SWITCH_TYPE_INT:
++ NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val.value.i);
++ break;
++ case SWITCH_TYPE_STRING:
++ NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val.value.s);
++ break;
++ case SWITCH_TYPE_PORTS:
++ err = swconfig_send_ports(&msg, info,
++ SWITCH_ATTR_OP_VALUE_PORTS, &val);
++ if (err < 0)
++ goto nla_put_failure;
++ break;
++ default:
++ DPRINTF("invalid type in attribute\n");
++ err = -EINVAL;
++ goto error;
++ }
++ err = genlmsg_end(msg, hdr);
++ if (err < 0)
++ goto nla_put_failure;
++
++ swconfig_put_dev(dev);
++ return genlmsg_unicast(msg, info->snd_pid);
++
++nla_put_failure:
++ if (msg)
++ nlmsg_free(msg);
++error_dev:
++ swconfig_put_dev(dev);
++error:
++ if (!err)
++ err = -ENOMEM;
++ return err;
++}
++
++static int
++swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
++ const struct switch_dev *dev)
++{
++ void *hdr;
++
++ hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags,
++ SWITCH_CMD_NEW_ATTR);
++ if (IS_ERR(hdr))
++ return -1;
++
++ NLA_PUT_U32(msg, SWITCH_ATTR_ID, dev->id);
++ NLA_PUT_STRING(msg, SWITCH_ATTR_NAME, dev->name);
++ NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname);
++ NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans);
++ NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports);
++
++ return genlmsg_end(msg, hdr);
++nla_put_failure:
++ genlmsg_cancel(msg, hdr);
++ return -EMSGSIZE;
++}
++
++static int swconfig_dump_switches(struct sk_buff *skb,
++ struct netlink_callback *cb)
++{
++ struct switch_dev *dev;
++ int start = cb->args[0];
++ int idx = 0;
++
++ swconfig_lock();
++ list_for_each_entry(dev, &swdevs, dev_list) {
++ if (++idx <= start)
++ continue;
++ if (swconfig_send_switch(skb, NETLINK_CB(cb->skb).pid,
++ cb->nlh->nlmsg_seq, NLM_F_MULTI,
++ dev) < 0)
++ break;
++ }
++ swconfig_unlock();
++ cb->args[0] = idx;
++
++ return skb->len;
++}
++
++static int
++swconfig_done(struct netlink_callback *cb)
++{
++ return 0;
++}
++
++static struct genl_ops swconfig_ops[] = {
++ {
++ .cmd = SWITCH_CMD_LIST_GLOBAL,
++ .doit = swconfig_list_attrs,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_LIST_VLAN,
++ .doit = swconfig_list_attrs,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_LIST_PORT,
++ .doit = swconfig_list_attrs,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_GET_GLOBAL,
++ .doit = swconfig_get_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_GET_VLAN,
++ .doit = swconfig_get_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_GET_PORT,
++ .doit = swconfig_get_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_SET_GLOBAL,
++ .doit = swconfig_set_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_SET_VLAN,
++ .doit = swconfig_set_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_SET_PORT,
++ .doit = swconfig_set_attr,
++ .policy = switch_policy,
++ },
++ {
++ .cmd = SWITCH_CMD_GET_SWITCH,
++ .dumpit = swconfig_dump_switches,
++ .policy = switch_policy,
++ .done = swconfig_done,
++ }
++};
++
++int
++register_switch(struct switch_dev *dev, struct net_device *netdev)
++{
++ INIT_LIST_HEAD(&dev->dev_list);
++ if (netdev) {
++ dev->netdev = netdev;
++ if (!dev->devname)
++ dev->devname = netdev->name;
++ }
++ BUG_ON(!dev->devname);
++
++ if (dev->ports > 0) {
++ dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports,
++ GFP_KERNEL);
++ if (!dev->portbuf)
++ return -ENOMEM;
++ }
++ dev->id = ++swdev_id;
++ swconfig_defaults_init(dev);
++ spin_lock_init(&dev->lock);
++ swconfig_lock();
++ list_add(&dev->dev_list, &swdevs);
++ swconfig_unlock();
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(register_switch);
++
++void
++unregister_switch(struct switch_dev *dev)
++{
++ kfree(dev->portbuf);
++ spin_lock(&dev->lock);
++ swconfig_lock();
++ list_del(&dev->dev_list);
++ swconfig_unlock();
++}
++EXPORT_SYMBOL_GPL(unregister_switch);
++
++
++static int __init
++swconfig_init(void)
++{
++ int i, err;
++
++ INIT_LIST_HEAD(&swdevs);
++ err = genl_register_family(&switch_fam);
++ if (err)
++ return err;
++
++ for (i = 0; i < ARRAY_SIZE(swconfig_ops); i++) {
++ err = genl_register_ops(&switch_fam, &swconfig_ops[i]);
++ if (err)
++ goto unregister;
++ }
++
++ return 0;
++
++unregister:
++ genl_unregister_family(&switch_fam);
++ return err;
++}
++
++static void __exit
++swconfig_exit(void)
++{
++ genl_unregister_family(&switch_fam);
++}
++
++module_init(swconfig_init);
++module_exit(swconfig_exit);
++
+diff -Nur linux-2.6.30.orig/include/linux/switch.h linux-2.6.30/include/linux/switch.h
+--- linux-2.6.30.orig/include/linux/switch.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.30/include/linux/switch.h 2009-06-11 09:22:50.000000000 +0200
+@@ -0,0 +1,168 @@
++/*
++ * switch.h: Switch configuration API
++ *
++ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version 2
++ * of the License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#ifndef __LINUX_SWITCH_H
++#define __LINUX_SWITCH_H
++
++#include <linux/types.h>
++#include <linux/netdevice.h>
++#include <linux/netlink.h>
++#include <linux/genetlink.h>
++#ifndef __KERNEL__
++#include <netlink/netlink.h>
++#include <netlink/genl/genl.h>
++#include <netlink/genl/ctrl.h>
++#else
++#include <net/genetlink.h>
++#endif
++
++/* main attributes */
++enum {
++ SWITCH_ATTR_UNSPEC,
++ /* global */
++ SWITCH_ATTR_TYPE,
++ /* device */
++ SWITCH_ATTR_ID,
++ SWITCH_ATTR_NAME,
++ SWITCH_ATTR_DEV_NAME,
++ SWITCH_ATTR_VLANS,
++ SWITCH_ATTR_PORTS,
++ /* attributes */
++ SWITCH_ATTR_OP_ID,
++ SWITCH_ATTR_OP_TYPE,
++ SWITCH_ATTR_OP_NAME,
++ SWITCH_ATTR_OP_PORT,
++ SWITCH_ATTR_OP_VLAN,
++ SWITCH_ATTR_OP_VALUE_INT,
++ SWITCH_ATTR_OP_VALUE_STR,
++ SWITCH_ATTR_OP_VALUE_PORTS,
++ SWITCH_ATTR_OP_DESCRIPTION,
++ /* port lists */
++ SWITCH_ATTR_PORT,
++ SWITCH_ATTR_MAX
++};
++
++/* commands */
++enum {
++ SWITCH_CMD_UNSPEC,
++ SWITCH_CMD_GET_SWITCH,
++ SWITCH_CMD_NEW_ATTR,
++ SWITCH_CMD_LIST_GLOBAL,
++ SWITCH_CMD_GET_GLOBAL,
++ SWITCH_CMD_SET_GLOBAL,
++ SWITCH_CMD_LIST_PORT,
++ SWITCH_CMD_GET_PORT,
++ SWITCH_CMD_SET_PORT,
++ SWITCH_CMD_LIST_VLAN,
++ SWITCH_CMD_GET_VLAN,
++ SWITCH_CMD_SET_VLAN
++};
++
++/* data types */
++enum switch_val_type {
++ SWITCH_TYPE_UNSPEC,
++ SWITCH_TYPE_INT,
++ SWITCH_TYPE_STRING,
++ SWITCH_TYPE_PORTS,
++ SWITCH_TYPE_NOVAL,
++};
++
++/* port nested attributes */
++enum {
++ SWITCH_PORT_UNSPEC,
++ SWITCH_PORT_ID,
++ SWITCH_PORT_FLAG_TAGGED,
++ SWITCH_PORT_ATTR_MAX
++};
++
++#define SWITCH_ATTR_DEFAULTS_OFFSET 0x1000
++
++#ifdef __KERNEL__
++
++struct switch_dev;
++struct switch_op;
++struct switch_val;
++struct switch_attr;
++struct switch_attrlist;
++
++int register_switch(struct switch_dev *dev, struct net_device *netdev);
++void unregister_switch(struct switch_dev *dev);
++
++struct switch_attrlist {
++ /* filled in by the driver */
++ int n_attr;
++ struct switch_attr *attr;
++};
++
++
++struct switch_dev {
++ int id;
++ void *priv;
++ const char *name;
++
++ /* NB: either devname or netdev must be set */
++ const char *devname;
++ struct net_device *netdev;
++
++ int ports;
++ int vlans;
++ int cpu_port;
++ struct switch_attrlist attr_global, attr_port, attr_vlan;
++
++ spinlock_t lock;
++ struct switch_port *portbuf;
++ struct list_head dev_list;
++ unsigned long def_global, def_port, def_vlan;
++
++ int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
++ int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
++ int (*apply_config)(struct switch_dev *dev);
++};
++
++struct switch_port {
++ u32 id;
++ u32 flags;
++};
++
++struct switch_val {
++ struct switch_attr *attr;
++ int port_vlan;
++ int len;
++ union {
++ const char *s;
++ u32 i;
++ struct switch_port *ports;
++ } value;
++};
++
++struct switch_attr {
++ int disabled;
++ int type;
++ const char *name;
++ const char *description;
++
++ int (*set)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val);
++ int (*get)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val);
++
++ /* for driver internal use */
++ int id;
++ int ofs;
++ int max;
++};
++
++#endif
++
++#endif
diff --git a/target/linux/patches/2.6.33/yaffs2.patch b/target/linux/patches/2.6.33/yaffs2.patch
new file mode 100644
index 000000000..d23ad0161
--- /dev/null
+++ b/target/linux/patches/2.6.33/yaffs2.patch
@@ -0,0 +1,15066 @@
+diff -Nur linux-2.6.32.orig/fs/Kconfig linux-2.6.32/fs/Kconfig
+--- linux-2.6.32.orig/fs/Kconfig 2009-12-03 04:51:21.000000000 +0100
++++ linux-2.6.32/fs/Kconfig 2010-01-30 20:35:00.921899692 +0100
+@@ -174,6 +174,10 @@
+ source "fs/befs/Kconfig"
+ source "fs/bfs/Kconfig"
+ source "fs/efs/Kconfig"
++
++# Patched by YAFFS
++source "fs/yaffs2/Kconfig"
++
+ source "fs/jffs2/Kconfig"
+ # UBIFS File system configuration
+ source "fs/ubifs/Kconfig"
+diff -Nur linux-2.6.32.orig/fs/Makefile linux-2.6.32/fs/Makefile
+--- linux-2.6.32.orig/fs/Makefile 2009-12-03 04:51:21.000000000 +0100
++++ linux-2.6.32/fs/Makefile 2010-01-30 20:35:00.933084814 +0100
+@@ -124,3 +124,4 @@
+ obj-$(CONFIG_BTRFS_FS) += btrfs/
+ obj-$(CONFIG_GFS2_FS) += gfs2/
+ obj-$(CONFIG_EXOFS_FS) += exofs/
++obj-$(CONFIG_YAFFS_FS) += yaffs2/
+diff -Nur linux-2.6.32.orig/fs/Makefile.pre.yaffs linux-2.6.32/fs/Makefile.pre.yaffs
+--- linux-2.6.32.orig/fs/Makefile.pre.yaffs 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/Makefile.pre.yaffs 2010-01-30 20:35:00.983076819 +0100
+@@ -0,0 +1,126 @@
++#
++# Makefile for the Linux filesystems.
++#
++# 14 Sep 2000, Christoph Hellwig <hch@infradead.org>
++# Rewritten to use lists instead of if-statements.
++#
++
++obj-y := open.o read_write.o file_table.o super.o \
++ char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
++ ioctl.o readdir.o select.o fifo.o dcache.o inode.o \
++ attr.o bad_inode.o file.o filesystems.o namespace.o \
++ seq_file.o xattr.o libfs.o fs-writeback.o \
++ pnode.o drop_caches.o splice.o sync.o utimes.o \
++ stack.o
++
++ifeq ($(CONFIG_BLOCK),y)
++obj-y += buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o
++else
++obj-y += no-block.o
++endif
++
++obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o
++obj-y += notify/
++obj-$(CONFIG_EPOLL) += eventpoll.o
++obj-$(CONFIG_ANON_INODES) += anon_inodes.o
++obj-$(CONFIG_SIGNALFD) += signalfd.o
++obj-$(CONFIG_TIMERFD) += timerfd.o
++obj-$(CONFIG_EVENTFD) += eventfd.o
++obj-$(CONFIG_AIO) += aio.o
++obj-$(CONFIG_FILE_LOCKING) += locks.o
++obj-$(CONFIG_COMPAT) += compat.o compat_ioctl.o
++
++nfsd-$(CONFIG_NFSD) := nfsctl.o
++obj-y += $(nfsd-y) $(nfsd-m)
++
++obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
++obj-$(CONFIG_BINFMT_EM86) += binfmt_em86.o
++obj-$(CONFIG_BINFMT_MISC) += binfmt_misc.o
++
++# binfmt_script is always there
++obj-y += binfmt_script.o
++
++obj-$(CONFIG_BINFMT_ELF) += binfmt_elf.o
++obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
++obj-$(CONFIG_BINFMT_ELF_FDPIC) += binfmt_elf_fdpic.o
++obj-$(CONFIG_BINFMT_SOM) += binfmt_som.o
++obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
++
++obj-$(CONFIG_FS_MBCACHE) += mbcache.o
++obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o xattr_acl.o
++obj-$(CONFIG_NFS_COMMON) += nfs_common/
++obj-$(CONFIG_GENERIC_ACL) += generic_acl.o
++
++obj-$(CONFIG_QUOTA) += dquot.o
++obj-$(CONFIG_QFMT_V1) += quota_v1.o
++obj-$(CONFIG_QFMT_V2) += quota_v2.o
++obj-$(CONFIG_QUOTA_TREE) += quota_tree.o
++obj-$(CONFIG_QUOTACTL) += quota.o
++
++obj-$(CONFIG_PROC_FS) += proc/
++obj-y += partitions/
++obj-$(CONFIG_SYSFS) += sysfs/
++obj-$(CONFIG_CONFIGFS_FS) += configfs/
++obj-y += devpts/
++
++obj-$(CONFIG_PROFILING) += dcookies.o
++obj-$(CONFIG_DLM) += dlm/
++
++# Do not add any filesystems before this line
++obj-$(CONFIG_REISERFS_FS) += reiserfs/
++obj-$(CONFIG_EXT3_FS) += ext3/ # Before ext2 so root fs can be ext3
++obj-$(CONFIG_EXT2_FS) += ext2/
++# We place ext4 after ext2 so plain ext2 root fs's are mounted using ext2
++# unless explicitly requested by rootfstype
++obj-$(CONFIG_EXT4_FS) += ext4/
++obj-$(CONFIG_JBD) += jbd/
++obj-$(CONFIG_JBD2) += jbd2/
++obj-$(CONFIG_CRAMFS) += cramfs/
++obj-$(CONFIG_SQUASHFS) += squashfs/
++obj-y += ramfs/
++obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
++obj-$(CONFIG_CODA_FS) += coda/
++obj-$(CONFIG_MINIX_FS) += minix/
++obj-$(CONFIG_FAT_FS) += fat/
++obj-$(CONFIG_BFS_FS) += bfs/
++obj-$(CONFIG_ISO9660_FS) += isofs/
++obj-$(CONFIG_HFSPLUS_FS) += hfsplus/ # Before hfs to find wrapped HFS+
++obj-$(CONFIG_HFS_FS) += hfs/
++obj-$(CONFIG_ECRYPT_FS) += ecryptfs/
++obj-$(CONFIG_VXFS_FS) += freevxfs/
++obj-$(CONFIG_NFS_FS) += nfs/
++obj-$(CONFIG_EXPORTFS) += exportfs/
++obj-$(CONFIG_NFSD) += nfsd/
++obj-$(CONFIG_LOCKD) += lockd/
++obj-$(CONFIG_NLS) += nls/
++obj-$(CONFIG_SYSV_FS) += sysv/
++obj-$(CONFIG_SMB_FS) += smbfs/
++obj-$(CONFIG_CIFS) += cifs/
++obj-$(CONFIG_NCP_FS) += ncpfs/
++obj-$(CONFIG_HPFS_FS) += hpfs/
++obj-$(CONFIG_NTFS_FS) += ntfs/
++obj-$(CONFIG_UFS_FS) += ufs/
++obj-$(CONFIG_EFS_FS) += efs/
++obj-$(CONFIG_JFFS2_FS) += jffs2/
++obj-$(CONFIG_UBIFS_FS) += ubifs/
++obj-$(CONFIG_AFFS_FS) += affs/
++obj-$(CONFIG_ROMFS_FS) += romfs/
++obj-$(CONFIG_QNX4FS_FS) += qnx4/
++obj-$(CONFIG_AUTOFS_FS) += autofs/
++obj-$(CONFIG_AUTOFS4_FS) += autofs4/
++obj-$(CONFIG_ADFS_FS) += adfs/
++obj-$(CONFIG_FUSE_FS) += fuse/
++obj-$(CONFIG_UDF_FS) += udf/
++obj-$(CONFIG_SUN_OPENPROMFS) += openpromfs/
++obj-$(CONFIG_OMFS_FS) += omfs/
++obj-$(CONFIG_JFS_FS) += jfs/
++obj-$(CONFIG_XFS_FS) += xfs/
++obj-$(CONFIG_9P_FS) += 9p/
++obj-$(CONFIG_AFS_FS) += afs/
++obj-$(CONFIG_BEFS_FS) += befs/
++obj-$(CONFIG_HOSTFS) += hostfs/
++obj-$(CONFIG_HPPFS) += hppfs/
++obj-$(CONFIG_DEBUG_FS) += debugfs/
++obj-$(CONFIG_OCFS2_FS) += ocfs2/
++obj-$(CONFIG_BTRFS_FS) += btrfs/
++obj-$(CONFIG_GFS2_FS) += gfs2/
+diff -Nur linux-2.6.32.orig/fs/yaffs2/devextras.h linux-2.6.32/fs/yaffs2/devextras.h
+--- linux-2.6.32.orig/fs/yaffs2/devextras.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/devextras.h 2010-01-30 20:35:01.021829008 +0100
+@@ -0,0 +1,196 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/*
++ * This file is just holds extra declarations of macros that would normally
++ * be providesd in the Linux kernel. These macros have been written from
++ * scratch but are functionally equivalent to the Linux ones.
++ *
++ */
++
++#ifndef __EXTRAS_H__
++#define __EXTRAS_H__
++
++
++#if !(defined __KERNEL__)
++
++/* Definition of types */
++typedef unsigned char __u8;
++typedef unsigned short __u16;
++typedef unsigned __u32;
++
++#endif
++
++/*
++ * This is a simple doubly linked list implementation that matches the
++ * way the Linux kernel doubly linked list implementation works.
++ */
++
++struct ylist_head {
++ struct ylist_head *next; /* next in chain */
++ struct ylist_head *prev; /* previous in chain */
++};
++
++
++/* Initialise a static list */
++#define YLIST_HEAD(name) \
++struct ylist_head name = { &(name), &(name)}
++
++
++
++/* Initialise a list head to an empty list */
++#define YINIT_LIST_HEAD(p) \
++do { \
++ (p)->next = (p);\
++ (p)->prev = (p); \
++} while (0)
++
++
++/* Add an element to a list */
++static __inline__ void ylist_add(struct ylist_head *newEntry,
++ struct ylist_head *list)
++{
++ struct ylist_head *listNext = list->next;
++
++ list->next = newEntry;
++ newEntry->prev = list;
++ newEntry->next = listNext;
++ listNext->prev = newEntry;
++
++}
++
++static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
++ struct ylist_head *list)
++{
++ struct ylist_head *listPrev = list->prev;
++
++ list->prev = newEntry;
++ newEntry->next = list;
++ newEntry->prev = listPrev;
++ listPrev->next = newEntry;
++
++}
++
++
++/* Take an element out of its current list, with or without
++ * reinitialising the links.of the entry*/
++static __inline__ void ylist_del(struct ylist_head *entry)
++{
++ struct ylist_head *listNext = entry->next;
++ struct ylist_head *listPrev = entry->prev;
++
++ listNext->prev = listPrev;
++ listPrev->next = listNext;
++
++}
++
++static __inline__ void ylist_del_init(struct ylist_head *entry)
++{
++ ylist_del(entry);
++ entry->next = entry->prev = entry;
++}
++
++
++/* Test if the list is empty */
++static __inline__ int ylist_empty(struct ylist_head *entry)
++{
++ return (entry->next == entry);
++}
++
++
++/* ylist_entry takes a pointer to a list entry and offsets it to that
++ * we can find a pointer to the object it is embedded in.
++ */
++
++
++#define ylist_entry(entry, type, member) \
++ ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
++
++
++/* ylist_for_each and list_for_each_safe iterate over lists.
++ * ylist_for_each_safe uses temporary storage to make the list delete safe
++ */
++
++#define ylist_for_each(itervar, list) \
++ for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
++
++#define ylist_for_each_safe(itervar, saveVar, list) \
++ for (itervar = (list)->next, saveVar = (list)->next->next; \
++ itervar != (list); itervar = saveVar, saveVar = saveVar->next)
++
++
++#if !(defined __KERNEL__)
++
++
++#ifndef WIN32
++#include <sys/stat.h>
++#endif
++
++
++#ifdef CONFIG_YAFFS_PROVIDE_DEFS
++/* File types */
++
++
++#define DT_UNKNOWN 0
++#define DT_FIFO 1
++#define DT_CHR 2
++#define DT_DIR 4
++#define DT_BLK 6
++#define DT_REG 8
++#define DT_LNK 10
++#define DT_SOCK 12
++#define DT_WHT 14
++
++
++#ifndef WIN32
++#include <sys/stat.h>
++#endif
++
++/*
++ * Attribute flags. These should be or-ed together to figure out what
++ * has been changed!
++ */
++#define ATTR_MODE 1
++#define ATTR_UID 2
++#define ATTR_GID 4
++#define ATTR_SIZE 8
++#define ATTR_ATIME 16
++#define ATTR_MTIME 32
++#define ATTR_CTIME 64
++
++struct iattr {
++ unsigned int ia_valid;
++ unsigned ia_mode;
++ unsigned ia_uid;
++ unsigned ia_gid;
++ unsigned ia_size;
++ unsigned ia_atime;
++ unsigned ia_mtime;
++ unsigned ia_ctime;
++ unsigned int ia_attr_flags;
++};
++
++#endif
++
++#else
++
++#include <linux/types.h>
++#include <linux/fs.h>
++#include <linux/stat.h>
++
++#endif
++
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/Kconfig linux-2.6.32/fs/yaffs2/Kconfig
+--- linux-2.6.32.orig/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/Kconfig 2010-01-30 20:35:01.053081300 +0100
+@@ -0,0 +1,156 @@
++#
++# YAFFS file system configurations
++#
++
++config YAFFS_FS
++ tristate "YAFFS2 file system support"
++ default n
++ depends on MTD_BLOCK
++ select YAFFS_YAFFS1
++ select YAFFS_YAFFS2
++ help
++ YAFFS2, or Yet Another Flash Filing System, is a filing system
++ optimised for NAND Flash chips.
++
++ To compile the YAFFS2 file system support as a module, choose M
++ here: the module will be called yaffs2.
++
++ If unsure, say N.
++
++ Further information on YAFFS2 is available at
++ <http://www.aleph1.co.uk/yaffs/>.
++
++config YAFFS_YAFFS1
++ bool "512 byte / page devices"
++ depends on YAFFS_FS
++ default y
++ help
++ Enable YAFFS1 support -- yaffs for 512 byte / page devices
++
++ Not needed for 2K-page devices.
++
++ If unsure, say Y.
++
++config YAFFS_9BYTE_TAGS
++ bool "Use older-style on-NAND data format with pageStatus byte"
++ depends on YAFFS_YAFFS1
++ default n
++ help
++
++ Older-style on-NAND data format has a "pageStatus" byte to record
++ chunk/page state. This byte is zero when the page is discarded.
++ Choose this option if you have existing on-NAND data using this
++ format that you need to continue to support. New data written
++ also uses the older-style format. Note: Use of this option
++ generally requires that MTD's oob layout be adjusted to use the
++ older-style format. See notes on tags formats and MTD versions
++ in yaffs_mtdif1.c.
++
++ If unsure, say N.
++
++config YAFFS_DOES_ECC
++ bool "Lets Yaffs do its own ECC"
++ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
++ default n
++ help
++ This enables Yaffs to use its own ECC functions instead of using
++ the ones from the generic MTD-NAND driver.
++
++ If unsure, say N.
++
++config YAFFS_ECC_WRONG_ORDER
++ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
++ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
++ default n
++ help
++ This makes yaffs_ecc.c use the same ecc byte order as Steven
++ Hill's nand_ecc.c. If not set, then you get the same ecc byte
++ order as SmartMedia.
++
++ If unsure, say N.
++
++config YAFFS_YAFFS2
++ bool "2048 byte (or larger) / page devices"
++ depends on YAFFS_FS
++ default y
++ help
++ Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices
++
++ If unsure, say Y.
++
++config YAFFS_AUTO_YAFFS2
++ bool "Autoselect yaffs2 format"
++ depends on YAFFS_YAFFS2
++ default y
++ help
++ Without this, you need to explicitely use yaffs2 as the file
++ system type. With this, you can say "yaffs" and yaffs or yaffs2
++ will be used depending on the device page size (yaffs on
++ 512-byte page devices, yaffs2 on 2K page devices).
++
++ If unsure, say Y.
++
++config YAFFS_DISABLE_LAZY_LOAD
++ bool "Disable lazy loading"
++ depends on YAFFS_YAFFS2
++ default n
++ help
++ "Lazy loading" defers loading file details until they are
++ required. This saves mount time, but makes the first look-up
++ a bit longer.
++
++ Lazy loading will only happen if enabled by this option being 'n'
++ and if the appropriate tags are available, else yaffs2 will
++ automatically fall back to immediate loading and do the right
++ thing.
++
++ Lazy laoding will be required by checkpointing.
++
++ Setting this to 'y' will disable lazy loading.
++
++ If unsure, say N.
++
++
++config YAFFS_DISABLE_WIDE_TNODES
++ bool "Turn off wide tnodes"
++ depends on YAFFS_FS
++ default n
++ help
++ Wide tnodes are only used for NAND arrays >=32MB for 512-byte
++ page devices and >=128MB for 2k page devices. They use slightly
++ more RAM but are faster since they eliminate chunk group
++ searching.
++
++ Setting this to 'y' will force tnode width to 16 bits and save
++ memory but make large arrays slower.
++
++ If unsure, say N.
++
++config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ bool "Force chunk erase check"
++ depends on YAFFS_FS
++ default n
++ help
++ Normally YAFFS only checks chunks before writing until an erased
++ chunk is found. This helps to detect any partially written
++ chunks that might have happened due to power loss.
++
++ Enabling this forces on the test that chunks are erased in flash
++ before writing to them. This takes more time but is potentially
++ a bit more secure.
++
++ Suggest setting Y during development and ironing out driver
++ issues etc. Suggest setting to N if you want faster writing.
++
++ If unsure, say Y.
++
++config YAFFS_SHORT_NAMES_IN_RAM
++ bool "Cache short names in RAM"
++ depends on YAFFS_FS
++ default y
++ help
++ If this config is set, then short names are stored with the
++ yaffs_Object. This costs an extra 16 bytes of RAM per object,
++ but makes look-ups faster.
++
++ If unsure, say Y.
+diff -Nur linux-2.6.32.orig/fs/yaffs2/Makefile linux-2.6.32/fs/yaffs2/Makefile
+--- linux-2.6.32.orig/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/Makefile 2010-01-30 20:35:01.093074881 +0100
+@@ -0,0 +1,10 @@
++#
++# Makefile for the linux YAFFS filesystem routines.
++#
++
++obj-$(CONFIG_YAFFS_FS) += yaffs.o
++
++yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
++yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
++yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
++yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
+diff -Nur linux-2.6.32.orig/fs/yaffs2/moduleconfig.h linux-2.6.32/fs/yaffs2/moduleconfig.h
+--- linux-2.6.32.orig/fs/yaffs2/moduleconfig.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/moduleconfig.h 2010-01-30 20:35:01.131828051 +0100
+@@ -0,0 +1,65 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Martin Fouts <Martin.Fouts@palmsource.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_CONFIG_H__
++#define __YAFFS_CONFIG_H__
++
++#ifdef YAFFS_OUT_OF_TREE
++
++/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
++#define CONFIG_YAFFS_FS
++#define CONFIG_YAFFS_YAFFS1
++#define CONFIG_YAFFS_YAFFS2
++
++/* These options are independent of each other. Select those that matter. */
++
++/* Default: Not selected */
++/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
++/* #define CONFIG_YAFFS_DOES_ECC */
++
++/* Default: Not selected */
++/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
++/* CONFIG_YAFFS_DOES_ECC is set */
++/* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
++
++/* Default: Selected */
++/* Meaning: Disables testing whether chunks are erased before writing to them*/
++#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
++
++/* Default: Selected */
++/* Meaning: Cache short names, taking more RAM, but faster look-ups */
++#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++
++/* Default: 10 */
++/* Meaning: set the count of blocks to reserve for checkpointing */
++#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
++
++/*
++Older-style on-NAND data format has a "pageStatus" byte to record
++chunk/page state. This byte is zeroed when the page is discarded.
++Choose this option if you have existing on-NAND data in this format
++that you need to continue to support. New data written also uses the
++older-style format.
++Note: Use of this option generally requires that MTD's oob layout be
++adjusted to use the older-style format. See notes on tags formats and
++MTD versions in yaffs_mtdif1.c.
++*/
++/* Default: Not selected */
++/* Meaning: Use older-style on-NAND data format with pageStatus byte */
++/* #define CONFIG_YAFFS_9BYTE_TAGS */
++
++#endif /* YAFFS_OUT_OF_TREE */
++
++#endif /* __YAFFS_CONFIG_H__ */
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_checkptrw.c linux-2.6.32/fs/yaffs2/yaffs_checkptrw.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_checkptrw.c 2010-01-30 20:35:01.171829690 +0100
+@@ -0,0 +1,394 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++const char *yaffs_checkptrw_c_version =
++ "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
++
++
++#include "yaffs_checkptrw.h"
++#include "yaffs_getblockinfo.h"
++
++static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
++{
++ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++
++ T(YAFFS_TRACE_CHECKPOINT,
++ (TSTR("checkpt blocks available = %d" TENDSTR),
++ blocksAvailable));
++
++ return (blocksAvailable <= 0) ? 0 : 1;
++}
++
++
++static int yaffs_CheckpointErase(yaffs_Device *dev)
++{
++ int i;
++
++ if (!dev->eraseBlockInNAND)
++ return 0;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
++ dev->internalStartBlock, dev->internalEndBlock));
++
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
++ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
++ if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
++ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ } else {
++ dev->markNANDBlockBad(dev, i);
++ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++ }
++ }
++ }
++
++ dev->blocksInCheckpoint = 0;
++
++ return 1;
++}
++
++
++static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
++{
++ int i;
++ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++ T(YAFFS_TRACE_CHECKPOINT,
++ (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
++ dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
++
++ if (dev->checkpointNextBlock >= 0 &&
++ dev->checkpointNextBlock <= dev->internalEndBlock &&
++ blocksAvailable > 0) {
++
++ for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
++ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
++ dev->checkpointNextBlock = i + 1;
++ dev->checkpointCurrentBlock = i;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i));
++ return;
++ }
++ }
++ }
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
++
++ dev->checkpointNextBlock = -1;
++ dev->checkpointCurrentBlock = -1;
++}
++
++static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
++{
++ int i;
++ yaffs_ExtendedTags tags;
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
++ dev->blocksInCheckpoint, dev->checkpointNextBlock));
++
++ if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
++ for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
++ int chunk = i * dev->nChunksPerBlock;
++ int realignedChunk = chunk - dev->chunkOffset;
++
++ dev->readChunkWithTagsFromNAND(dev, realignedChunk,
++ NULL, &tags);
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
++ i, tags.objectId, tags.sequenceNumber, tags.eccResult));
++
++ if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
++ /* Right kind of block */
++ dev->checkpointNextBlock = tags.objectId;
++ dev->checkpointCurrentBlock = i;
++ dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
++ dev->blocksInCheckpoint++;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i));
++ return;
++ }
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
++
++ dev->checkpointNextBlock = -1;
++ dev->checkpointCurrentBlock = -1;
++}
++
++
++int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
++{
++
++ /* Got the functions we need? */
++ if (!dev->writeChunkWithTagsToNAND ||
++ !dev->readChunkWithTagsFromNAND ||
++ !dev->eraseBlockInNAND ||
++ !dev->markNANDBlockBad)
++ return 0;
++
++ if (forWriting && !yaffs_CheckpointSpaceOk(dev))
++ return 0;
++
++ if (!dev->checkpointBuffer)
++ dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
++ if (!dev->checkpointBuffer)
++ return 0;
++
++
++ dev->checkpointPageSequence = 0;
++
++ dev->checkpointOpenForWrite = forWriting;
++
++ dev->checkpointByteCount = 0;
++ dev->checkpointSum = 0;
++ dev->checkpointXor = 0;
++ dev->checkpointCurrentBlock = -1;
++ dev->checkpointCurrentChunk = -1;
++ dev->checkpointNextBlock = dev->internalStartBlock;
++
++ /* Erase all the blocks in the checkpoint area */
++ if (forWriting) {
++ memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
++ dev->checkpointByteOffset = 0;
++ return yaffs_CheckpointErase(dev);
++ } else {
++ int i;
++ /* Set to a value that will kick off a read */
++ dev->checkpointByteOffset = dev->nDataBytesPerChunk;
++ /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
++ * going to be way more than we need */
++ dev->blocksInCheckpoint = 0;
++ dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
++ dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
++ for (i = 0; i < dev->checkpointMaxBlocks; i++)
++ dev->checkpointBlockList[i] = -1;
++ }
++
++ return 1;
++}
++
++int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
++{
++ __u32 compositeSum;
++ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
++ *sum = compositeSum;
++ return 1;
++}
++
++static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
++{
++ int chunk;
++ int realignedChunk;
++
++ yaffs_ExtendedTags tags;
++
++ if (dev->checkpointCurrentBlock < 0) {
++ yaffs_CheckpointFindNextErasedBlock(dev);
++ dev->checkpointCurrentChunk = 0;
++ }
++
++ if (dev->checkpointCurrentBlock < 0)
++ return 0;
++
++ tags.chunkDeleted = 0;
++ tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
++ tags.chunkId = dev->checkpointPageSequence + 1;
++ tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA;
++ tags.byteCount = dev->nDataBytesPerChunk;
++ if (dev->checkpointCurrentChunk == 0) {
++ /* First chunk we write for the block? Set block state to
++ checkpoint */
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock);
++ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
++ dev->blocksInCheckpoint++;
++ }
++
++ chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
++
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
++ chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId));
++
++ realignedChunk = chunk - dev->chunkOffset;
++
++ dev->writeChunkWithTagsToNAND(dev, realignedChunk,
++ dev->checkpointBuffer, &tags);
++ dev->checkpointByteOffset = 0;
++ dev->checkpointPageSequence++;
++ dev->checkpointCurrentChunk++;
++ if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
++ dev->checkpointCurrentChunk = 0;
++ dev->checkpointCurrentBlock = -1;
++ }
++ memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
++
++ return 1;
++}
++
++
++int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
++{
++ int i = 0;
++ int ok = 1;
++
++
++ __u8 * dataBytes = (__u8 *)data;
++
++
++
++ if (!dev->checkpointBuffer)
++ return 0;
++
++ if (!dev->checkpointOpenForWrite)
++ return -1;
++
++ while (i < nBytes && ok) {
++ dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes;
++ dev->checkpointSum += *dataBytes;
++ dev->checkpointXor ^= *dataBytes;
++
++ dev->checkpointByteOffset++;
++ i++;
++ dataBytes++;
++ dev->checkpointByteCount++;
++
++
++ if (dev->checkpointByteOffset < 0 ||
++ dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
++ ok = yaffs_CheckpointFlushBuffer(dev);
++ }
++
++ return i;
++}
++
++int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
++{
++ int i = 0;
++ int ok = 1;
++ yaffs_ExtendedTags tags;
++
++
++ int chunk;
++ int realignedChunk;
++
++ __u8 *dataBytes = (__u8 *)data;
++
++ if (!dev->checkpointBuffer)
++ return 0;
++
++ if (dev->checkpointOpenForWrite)
++ return -1;
++
++ while (i < nBytes && ok) {
++
++
++ if (dev->checkpointByteOffset < 0 ||
++ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
++
++ if (dev->checkpointCurrentBlock < 0) {
++ yaffs_CheckpointFindNextCheckpointBlock(dev);
++ dev->checkpointCurrentChunk = 0;
++ }
++
++ if (dev->checkpointCurrentBlock < 0)
++ ok = 0;
++ else {
++ chunk = dev->checkpointCurrentBlock *
++ dev->nChunksPerBlock +
++ dev->checkpointCurrentChunk;
++
++ realignedChunk = chunk - dev->chunkOffset;
++
++ /* read in the next chunk */
++ /* printf("read checkpoint page %d\n",dev->checkpointPage); */
++ dev->readChunkWithTagsFromNAND(dev,
++ realignedChunk,
++ dev->checkpointBuffer,
++ &tags);
++
++ if (tags.chunkId != (dev->checkpointPageSequence + 1) ||
++ tags.eccResult > YAFFS_ECC_RESULT_FIXED ||
++ tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
++ ok = 0;
++
++ dev->checkpointByteOffset = 0;
++ dev->checkpointPageSequence++;
++ dev->checkpointCurrentChunk++;
++
++ if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
++ dev->checkpointCurrentBlock = -1;
++ }
++ }
++
++ if (ok) {
++ *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
++ dev->checkpointSum += *dataBytes;
++ dev->checkpointXor ^= *dataBytes;
++ dev->checkpointByteOffset++;
++ i++;
++ dataBytes++;
++ dev->checkpointByteCount++;
++ }
++ }
++
++ return i;
++}
++
++int yaffs_CheckpointClose(yaffs_Device *dev)
++{
++
++ if (dev->checkpointOpenForWrite) {
++ if (dev->checkpointByteOffset != 0)
++ yaffs_CheckpointFlushBuffer(dev);
++ } else {
++ int i;
++ for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
++ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
++ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
++ else {
++ /* Todo this looks odd... */
++ }
++ }
++ YFREE(dev->checkpointBlockList);
++ dev->checkpointBlockList = NULL;
++ }
++
++ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
++ dev->nErasedBlocks -= dev->blocksInCheckpoint;
++
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
++ dev->checkpointByteCount));
++
++ if (dev->checkpointBuffer) {
++ /* free the buffer */
++ YFREE(dev->checkpointBuffer);
++ dev->checkpointBuffer = NULL;
++ return 1;
++ } else
++ return 0;
++}
++
++int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
++{
++ /* Erase the first checksum block */
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
++
++ if (!yaffs_CheckpointSpaceOk(dev))
++ return 0;
++
++ return yaffs_CheckpointErase(dev);
++}
++
++
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_checkptrw.h linux-2.6.32/fs/yaffs2/yaffs_checkptrw.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_checkptrw.h 2010-01-30 20:35:01.213084831 +0100
+@@ -0,0 +1,35 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_CHECKPTRW_H__
++#define __YAFFS_CHECKPTRW_H__
++
++#include "yaffs_guts.h"
++
++int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
++
++int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
++
++int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
++
++int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
++
++int yaffs_CheckpointClose(yaffs_Device *dev);
++
++int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
++
++
++#endif
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_ecc.c linux-2.6.32/fs/yaffs2/yaffs_ecc.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_ecc.c 2010-01-30 20:35:01.251829837 +0100
+@@ -0,0 +1,326 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * This code implements the ECC algorithm used in SmartMedia.
++ *
++ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
++ * The two unused bit are set to 1.
++ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
++ * blocks are used on a 512-byte NAND page.
++ *
++ */
++
++/* Table generated by gen-ecc.c
++ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
++ * for each byte of data. These are instead provided in a table in bits7..2.
++ * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore
++ * this bytes influence on the line parity.
++ */
++
++const char *yaffs_ecc_c_version =
++ "$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
++
++#include "yportenv.h"
++
++#include "yaffs_ecc.h"
++
++static const unsigned char column_parity_table[] = {
++ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
++ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
++ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
++ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
++ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
++ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
++ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
++ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
++ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
++ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
++ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
++ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
++ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
++ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
++ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
++ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
++ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
++ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
++ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
++ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
++ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
++ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
++ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
++ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
++ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
++ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
++ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
++ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
++ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
++ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
++ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
++ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
++};
++
++/* Count the bits in an unsigned char or a U32 */
++
++static int yaffs_CountBits(unsigned char x)
++{
++ int r = 0;
++ while (x) {
++ if (x & 1)
++ r++;
++ x >>= 1;
++ }
++ return r;
++}
++
++static int yaffs_CountBits32(unsigned x)
++{
++ int r = 0;
++ while (x) {
++ if (x & 1)
++ r++;
++ x >>= 1;
++ }
++ return r;
++}
++
++/* Calculate the ECC for a 256-byte block of data */
++void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
++{
++ unsigned int i;
++
++ unsigned char col_parity = 0;
++ unsigned char line_parity = 0;
++ unsigned char line_parity_prime = 0;
++ unsigned char t;
++ unsigned char b;
++
++ for (i = 0; i < 256; i++) {
++ b = column_parity_table[*data++];
++ col_parity ^= b;
++
++ if (b & 0x01) { /* odd number of bits in the byte */
++ line_parity ^= i;
++ line_parity_prime ^= ~i;
++ }
++ }
++
++ ecc[2] = (~col_parity) | 0x03;
++
++ t = 0;
++ if (line_parity & 0x80)
++ t |= 0x80;
++ if (line_parity_prime & 0x80)
++ t |= 0x40;
++ if (line_parity & 0x40)
++ t |= 0x20;
++ if (line_parity_prime & 0x40)
++ t |= 0x10;
++ if (line_parity & 0x20)
++ t |= 0x08;
++ if (line_parity_prime & 0x20)
++ t |= 0x04;
++ if (line_parity & 0x10)
++ t |= 0x02;
++ if (line_parity_prime & 0x10)
++ t |= 0x01;
++ ecc[1] = ~t;
++
++ t = 0;
++ if (line_parity & 0x08)
++ t |= 0x80;
++ if (line_parity_prime & 0x08)
++ t |= 0x40;
++ if (line_parity & 0x04)
++ t |= 0x20;
++ if (line_parity_prime & 0x04)
++ t |= 0x10;
++ if (line_parity & 0x02)
++ t |= 0x08;
++ if (line_parity_prime & 0x02)
++ t |= 0x04;
++ if (line_parity & 0x01)
++ t |= 0x02;
++ if (line_parity_prime & 0x01)
++ t |= 0x01;
++ ecc[0] = ~t;
++
++#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
++ /* Swap the bytes into the wrong order */
++ t = ecc[0];
++ ecc[0] = ecc[1];
++ ecc[1] = t;
++#endif
++}
++
++
++/* Correct the ECC on a 256 byte block of data */
++
++int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
++ const unsigned char *test_ecc)
++{
++ unsigned char d0, d1, d2; /* deltas */
++
++ d0 = read_ecc[0] ^ test_ecc[0];
++ d1 = read_ecc[1] ^ test_ecc[1];
++ d2 = read_ecc[2] ^ test_ecc[2];
++
++ if ((d0 | d1 | d2) == 0)
++ return 0; /* no error */
++
++ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
++ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
++ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
++ /* Single bit (recoverable) error in data */
++
++ unsigned byte;
++ unsigned bit;
++
++#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
++ /* swap the bytes to correct for the wrong order */
++ unsigned char t;
++
++ t = d0;
++ d0 = d1;
++ d1 = t;
++#endif
++
++ bit = byte = 0;
++
++ if (d1 & 0x80)
++ byte |= 0x80;
++ if (d1 & 0x20)
++ byte |= 0x40;
++ if (d1 & 0x08)
++ byte |= 0x20;
++ if (d1 & 0x02)
++ byte |= 0x10;
++ if (d0 & 0x80)
++ byte |= 0x08;
++ if (d0 & 0x20)
++ byte |= 0x04;
++ if (d0 & 0x08)
++ byte |= 0x02;
++ if (d0 & 0x02)
++ byte |= 0x01;
++
++ if (d2 & 0x80)
++ bit |= 0x04;
++ if (d2 & 0x20)
++ bit |= 0x02;
++ if (d2 & 0x08)
++ bit |= 0x01;
++
++ data[byte] ^= (1 << bit);
++
++ return 1; /* Corrected the error */
++ }
++
++ if ((yaffs_CountBits(d0) +
++ yaffs_CountBits(d1) +
++ yaffs_CountBits(d2)) == 1) {
++ /* Reccoverable error in ecc */
++
++ read_ecc[0] = test_ecc[0];
++ read_ecc[1] = test_ecc[1];
++ read_ecc[2] = test_ecc[2];
++
++ return 1; /* Corrected the error */
++ }
++
++ /* Unrecoverable error */
++
++ return -1;
++
++}
++
++
++/*
++ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
++ */
++void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
++ yaffs_ECCOther *eccOther)
++{
++ unsigned int i;
++
++ unsigned char col_parity = 0;
++ unsigned line_parity = 0;
++ unsigned line_parity_prime = 0;
++ unsigned char b;
++
++ for (i = 0; i < nBytes; i++) {
++ b = column_parity_table[*data++];
++ col_parity ^= b;
++
++ if (b & 0x01) {
++ /* odd number of bits in the byte */
++ line_parity ^= i;
++ line_parity_prime ^= ~i;
++ }
++
++ }
++
++ eccOther->colParity = (col_parity >> 2) & 0x3f;
++ eccOther->lineParity = line_parity;
++ eccOther->lineParityPrime = line_parity_prime;
++}
++
++int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
++ yaffs_ECCOther *read_ecc,
++ const yaffs_ECCOther *test_ecc)
++{
++ unsigned char cDelta; /* column parity delta */
++ unsigned lDelta; /* line parity delta */
++ unsigned lDeltaPrime; /* line parity delta */
++ unsigned bit;
++
++ cDelta = read_ecc->colParity ^ test_ecc->colParity;
++ lDelta = read_ecc->lineParity ^ test_ecc->lineParity;
++ lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime;
++
++ if ((cDelta | lDelta | lDeltaPrime) == 0)
++ return 0; /* no error */
++
++ if (lDelta == ~lDeltaPrime &&
++ (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) {
++ /* Single bit (recoverable) error in data */
++
++ bit = 0;
++
++ if (cDelta & 0x20)
++ bit |= 0x04;
++ if (cDelta & 0x08)
++ bit |= 0x02;
++ if (cDelta & 0x02)
++ bit |= 0x01;
++
++ if (lDelta >= nBytes)
++ return -1;
++
++ data[lDelta] ^= (1 << bit);
++
++ return 1; /* corrected */
++ }
++
++ if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) +
++ yaffs_CountBits(cDelta)) == 1) {
++ /* Reccoverable error in ecc */
++
++ *read_ecc = *test_ecc;
++ return 1; /* corrected */
++ }
++
++ /* Unrecoverable error */
++
++ return -1;
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_ecc.h linux-2.6.32/fs/yaffs2/yaffs_ecc.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_ecc.h 2010-01-30 20:35:01.292693842 +0100
+@@ -0,0 +1,44 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/*
++ * This code implements the ECC algorithm used in SmartMedia.
++ *
++ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
++ * The two unused bit are set to 1.
++ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
++ * blocks are used on a 512-byte NAND page.
++ *
++ */
++
++#ifndef __YAFFS_ECC_H__
++#define __YAFFS_ECC_H__
++
++typedef struct {
++ unsigned char colParity;
++ unsigned lineParity;
++ unsigned lineParityPrime;
++} yaffs_ECCOther;
++
++void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc);
++int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
++ const unsigned char *test_ecc);
++
++void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
++ yaffs_ECCOther *ecc);
++int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
++ yaffs_ECCOther *read_ecc,
++ const yaffs_ECCOther *test_ecc);
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_fs.c linux-2.6.32/fs/yaffs2/yaffs_fs.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_fs.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_fs.c 2010-01-30 20:35:01.331845579 +0100
+@@ -0,0 +1,2529 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2009 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ * Acknowledgements:
++ * Luc van OostenRyck for numerous patches.
++ * Nick Bane for numerous patches.
++ * Nick Bane for 2.5/2.6 integration.
++ * Andras Toth for mknod rdev issue.
++ * Michael Fischer for finding the problem with inode inconsistency.
++ * Some code bodily lifted from JFFS
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ *
++ * This is the file system front-end to YAFFS that hooks it up to
++ * the VFS.
++ *
++ * Special notes:
++ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
++ * this superblock
++ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
++ * superblock
++ * >> inode->u.generic_ip points to the associated yaffs_Object.
++ */
++
++const char *yaffs_fs_c_version =
++ "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
++extern const char *yaffs_guts_c_version;
++
++#include <linux/version.h>
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++#include <linux/config.h>
++#endif
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/proc_fs.h>
++#include <linux/smp_lock.h>
++#include <linux/pagemap.h>
++#include <linux/mtd/mtd.h>
++#include <linux/interrupt.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++
++#include "asm/div64.h"
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++#include <linux/statfs.h> /* Added NCB 15-8-2003 */
++#include <linux/statfs.h>
++#define UnlockPage(p) unlock_page(p)
++#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
++
++/* FIXME: use sb->s_id instead ? */
++#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
++
++#else
++
++#include <linux/locks.h>
++#define BDEVNAME_SIZE 0
++#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
++/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
++#define __user
++#endif
++
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
++#define YPROC_ROOT (&proc_root)
++#else
++#define YPROC_ROOT NULL
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++#define WRITE_SIZE_STR "writesize"
++#define WRITE_SIZE(mtd) ((mtd)->writesize)
++#else
++#define WRITE_SIZE_STR "oobblock"
++#define WRITE_SIZE(mtd) ((mtd)->oobblock)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
++#define YAFFS_USE_WRITE_BEGIN_END 1
++#else
++#define YAFFS_USE_WRITE_BEGIN_END 0
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
++static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
++{
++ uint64_t result = partition_size;
++ do_div(result, block_size);
++ return (uint32_t)result;
++}
++#else
++#define YCALCBLOCKS(s, b) ((s)/(b))
++#endif
++
++#include <linux/uaccess.h>
++
++#include "yportenv.h"
++#include "yaffs_guts.h"
++
++#include <linux/mtd/mtd.h>
++#include "yaffs_mtdif.h"
++#include "yaffs_mtdif1.h"
++#include "yaffs_mtdif2.h"
++
++unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
++unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
++unsigned int yaffs_auto_checkpoint = 1;
++
++/* Module Parameters */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++module_param(yaffs_traceMask, uint, 0644);
++module_param(yaffs_wr_attempts, uint, 0644);
++module_param(yaffs_auto_checkpoint, uint, 0644);
++#else
++MODULE_PARM(yaffs_traceMask, "i");
++MODULE_PARM(yaffs_wr_attempts, "i");
++MODULE_PARM(yaffs_auto_checkpoint, "i");
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
++/* use iget and read_inode */
++#define Y_IGET(sb, inum) iget((sb), (inum))
++static void yaffs_read_inode(struct inode *inode);
++
++#else
++/* Call local equivalent */
++#define YAFFS_USE_OWN_IGET
++#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
++#endif
++
++/*#define T(x) printk x */
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
++#else
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
++#endif
++
++#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
++#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
++#else
++#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
++#endif
++
++static void yaffs_put_super(struct super_block *sb);
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++ loff_t *pos);
++static ssize_t yaffs_hold_space(struct file *f);
++static void yaffs_release_space(struct file *f);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id);
++#else
++static int yaffs_file_flush(struct file *file);
++#endif
++
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++ int datasync);
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *n);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++ struct nameidata *n);
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
++#endif
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++ struct dentry *dentry);
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++ const char *symname);
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ dev_t dev);
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ int dev);
++#endif
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry);
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait);
++static void yaffs_write_super(struct super_block *sb);
++#else
++static int yaffs_sync_fs(struct super_block *sb);
++static int yaffs_write_super(struct super_block *sb);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
++#endif
++
++#ifdef YAFFS_HAS_PUT_INODE
++static void yaffs_put_inode(struct inode *inode);
++#endif
++
++static void yaffs_delete_inode(struct inode *);
++static void yaffs_clear_inode(struct inode *);
++
++static int yaffs_readpage(struct file *file, struct page *page);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
++#else
++static int yaffs_writepage(struct page *page);
++#endif
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END != 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned flags,
++ struct page **pagep, void **fsdata);
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned copied,
++ struct page *pg, void *fsdadata);
++#else
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++ unsigned offset, unsigned to);
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++ unsigned to);
++
++#endif
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++ int buflen);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#endif
++
++static struct address_space_operations yaffs_file_address_operations = {
++ .readpage = yaffs_readpage,
++ .writepage = yaffs_writepage,
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++ .write_begin = yaffs_write_begin,
++ .write_end = yaffs_write_end,
++#else
++ .prepare_write = yaffs_prepare_write,
++ .commit_write = yaffs_commit_write,
++#endif
++};
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
++static const struct file_operations yaffs_file_operations = {
++ .read = do_sync_read,
++ .write = do_sync_write,
++ .aio_read = generic_file_aio_read,
++ .aio_write = generic_file_aio_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++ .splice_read = generic_file_splice_read,
++ .splice_write = generic_file_splice_write,
++ .llseek = generic_file_llseek,
++};
++
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++
++static const struct file_operations yaffs_file_operations = {
++ .read = do_sync_read,
++ .write = do_sync_write,
++ .aio_read = generic_file_aio_read,
++ .aio_write = generic_file_aio_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++ .sendfile = generic_file_sendfile,
++};
++
++#else
++
++static const struct file_operations yaffs_file_operations = {
++ .read = generic_file_read,
++ .write = generic_file_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ .sendfile = generic_file_sendfile,
++#endif
++};
++#endif
++
++static const struct inode_operations yaffs_file_inode_operations = {
++ .setattr = yaffs_setattr,
++};
++
++static const struct inode_operations yaffs_symlink_inode_operations = {
++ .readlink = yaffs_readlink,
++ .follow_link = yaffs_follow_link,
++ .setattr = yaffs_setattr,
++};
++
++static const struct inode_operations yaffs_dir_inode_operations = {
++ .create = yaffs_create,
++ .lookup = yaffs_lookup,
++ .link = yaffs_link,
++ .unlink = yaffs_unlink,
++ .symlink = yaffs_symlink,
++ .mkdir = yaffs_mkdir,
++ .rmdir = yaffs_unlink,
++ .mknod = yaffs_mknod,
++ .rename = yaffs_rename,
++ .setattr = yaffs_setattr,
++};
++
++static const struct file_operations yaffs_dir_operations = {
++ .read = generic_read_dir,
++ .readdir = yaffs_readdir,
++ .fsync = yaffs_sync_object,
++};
++
++static const struct super_operations yaffs_super_ops = {
++ .statfs = yaffs_statfs,
++
++#ifndef YAFFS_USE_OWN_IGET
++ .read_inode = yaffs_read_inode,
++#endif
++#ifdef YAFFS_HAS_PUT_INODE
++ .put_inode = yaffs_put_inode,
++#endif
++ .put_super = yaffs_put_super,
++ .delete_inode = yaffs_delete_inode,
++ .clear_inode = yaffs_clear_inode,
++ .sync_fs = yaffs_sync_fs,
++ .write_super = yaffs_write_super,
++};
++
++static void yaffs_GrossLock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
++ down(&dev->grossLock);
++ T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
++}
++
++static void yaffs_GrossUnlock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
++ up(&dev->grossLock);
++}
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++ int buflen)
++{
++ unsigned char *alias;
++ int ret;
++
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
++
++ yaffs_GrossUnlock(dev);
++
++ if (!alias)
++ return -ENOMEM;
++
++ ret = vfs_readlink(dentry, buffer, buflen, alias);
++ kfree(alias);
++ return ret;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#endif
++{
++ unsigned char *alias;
++ int ret;
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
++
++ yaffs_GrossUnlock(dev);
++
++ if (!alias) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ ret = vfs_follow_link(nd, alias);
++ kfree(alias);
++out:
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++ return ERR_PTR(ret);
++#else
++ return ret;
++#endif
++}
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++ yaffs_Object *obj);
++
++/*
++ * Lookup is used to find objects in the fs
++ */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++ struct nameidata *n)
++#else
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
++#endif
++{
++ yaffs_Object *obj;
++ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
++
++ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_lookup for %d:%s\n",
++ yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
++
++ obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
++ dentry->d_name.name);
++
++ obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
++
++ /* Can't hold gross lock when calling yaffs_get_inode() */
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_lookup found %d\n", obj->objectId));
++
++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++
++ if (inode) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_loookup dentry \n"));
++/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
++ * d_add even if NULL inode */
++#if 0
++ /*dget(dentry); // try to solve directory bug */
++ d_add(dentry, inode);
++
++ /* return dentry; */
++ return NULL;
++#endif
++ }
++
++ } else {
++ T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
++
++ }
++
++/* added NCB for 2.5/6 compatability - forces add even if inode is
++ * NULL which creates dentry hash */
++ d_add(dentry, inode);
++
++ return NULL;
++}
++
++
++#ifdef YAFFS_HAS_PUT_INODE
++
++/* For now put inode is just for debugging
++ * Put inode is called when the inode **structure** is put.
++ */
++static void yaffs_put_inode(struct inode *inode)
++{
++ T(YAFFS_TRACE_OS,
++ ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
++ atomic_read(&inode->i_count)));
++
++}
++#endif
++
++/* clear is called to tell the fs to release any per-inode data it holds */
++static void yaffs_clear_inode(struct inode *inode)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++ obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
++ atomic_read(&inode->i_count),
++ obj ? "object exists" : "null object"));
++
++ if (obj) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++
++ /* Clear the association between the inode and
++ * the yaffs_Object.
++ */
++ obj->myInode = NULL;
++ yaffs_InodeToObjectLV(inode) = NULL;
++
++ /* If the object freeing was deferred, then the real
++ * free happens now.
++ * This should fix the inode inconsistency problem.
++ */
++
++ yaffs_HandleDeferedFree(obj);
++
++ yaffs_GrossUnlock(dev);
++ }
++
++}
++
++/* delete is called when the link count is zero and the inode
++ * is put (ie. nobody wants to know about it anymore, time to
++ * delete the file).
++ * NB Must call clear_inode()
++ */
++static void yaffs_delete_inode(struct inode *inode)
++{
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
++ atomic_read(&inode->i_count),
++ obj ? "object exists" : "null object"));
++
++ if (obj) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ yaffs_DeleteObject(obj);
++ yaffs_GrossUnlock(dev);
++ }
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++ truncate_inode_pages(&inode->i_data, 0);
++#endif
++ clear_inode(inode);
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id)
++#else
++static int yaffs_file_flush(struct file *file)
++#endif
++{
++ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
++
++ yaffs_Device *dev = obj->myDev;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_file_flush object %d (%s)\n", obj->objectId,
++ obj->dirty ? "dirty" : "clean"));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushFile(obj, 1);
++
++ yaffs_GrossUnlock(dev);
++
++ return 0;
++}
++
++static int yaffs_readpage_nolock(struct file *f, struct page *pg)
++{
++ /* Lifted from jffs2 */
++
++ yaffs_Object *obj;
++ unsigned char *pg_buf;
++ int ret;
++
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
++ (unsigned)(pg->index << PAGE_CACHE_SHIFT),
++ (unsigned)PAGE_CACHE_SIZE));
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ BUG_ON(!PageLocked(pg));
++#else
++ if (!PageLocked(pg))
++ PAGE_BUG(pg);
++#endif
++
++ pg_buf = kmap(pg);
++ /* FIXME: Can kmap fail? */
++
++ yaffs_GrossLock(dev);
++
++ ret = yaffs_ReadDataFromFile(obj, pg_buf,
++ pg->index << PAGE_CACHE_SHIFT,
++ PAGE_CACHE_SIZE);
++
++ yaffs_GrossUnlock(dev);
++
++ if (ret >= 0)
++ ret = 0;
++
++ if (ret) {
++ ClearPageUptodate(pg);
++ SetPageError(pg);
++ } else {
++ SetPageUptodate(pg);
++ ClearPageError(pg);
++ }
++
++ flush_dcache_page(pg);
++ kunmap(pg);
++
++ T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
++ return ret;
++}
++
++static int yaffs_readpage_unlock(struct file *f, struct page *pg)
++{
++ int ret = yaffs_readpage_nolock(f, pg);
++ UnlockPage(pg);
++ return ret;
++}
++
++static int yaffs_readpage(struct file *f, struct page *pg)
++{
++ return yaffs_readpage_unlock(f, pg);
++}
++
++/* writepage inspired by/stolen from smbfs */
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
++#else
++static int yaffs_writepage(struct page *page)
++#endif
++{
++ struct address_space *mapping = page->mapping;
++ loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
++ struct inode *inode;
++ unsigned long end_index;
++ char *buffer;
++ yaffs_Object *obj;
++ int nWritten = 0;
++ unsigned nBytes;
++
++ if (!mapping)
++ BUG();
++ inode = mapping->host;
++ if (!inode)
++ BUG();
++
++ if (offset > inode->i_size) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_writepage at %08x, inode size = %08x!!!\n",
++ (unsigned)(page->index << PAGE_CACHE_SHIFT),
++ (unsigned)inode->i_size));
++ T(YAFFS_TRACE_OS,
++ (" -> don't care!!\n"));
++ unlock_page(page);
++ return 0;
++ }
++
++ end_index = inode->i_size >> PAGE_CACHE_SHIFT;
++
++ /* easy case */
++ if (page->index < end_index)
++ nBytes = PAGE_CACHE_SIZE;
++ else
++ nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
++
++ get_page(page);
++
++ buffer = kmap(page);
++
++ obj = yaffs_InodeToObject(inode);
++ yaffs_GrossLock(obj->myDev);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_writepage at %08x, size %08x\n",
++ (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
++ T(YAFFS_TRACE_OS,
++ ("writepag0: obj = %05x, ino = %05x\n",
++ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
++
++ nWritten = yaffs_WriteDataToFile(obj, buffer,
++ page->index << PAGE_CACHE_SHIFT, nBytes, 0);
++
++ T(YAFFS_TRACE_OS,
++ ("writepag1: obj = %05x, ino = %05x\n",
++ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
++
++ yaffs_GrossUnlock(obj->myDev);
++
++ kunmap(page);
++ SetPageUptodate(page);
++ UnlockPage(page);
++ put_page(page);
++
++ return (nWritten == nBytes) ? 0 : -ENOSPC;
++}
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned flags,
++ struct page **pagep, void **fsdata)
++{
++ struct page *pg = NULL;
++ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
++ uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
++ uint32_t to = offset + len;
++
++ int ret = 0;
++ int space_held = 0;
++
++ T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
++ /* Get a page */
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
++ pg = grab_cache_page_write_begin(mapping, index, flags);
++#else
++ pg = __grab_cache_page(mapping, index);
++#endif
++
++ *pagep = pg;
++ if (!pg) {
++ ret = -ENOMEM;
++ goto out;
++ }
++ /* Get fs space */
++ space_held = yaffs_hold_space(filp);
++
++ if (!space_held) {
++ ret = -ENOSPC;
++ goto out;
++ }
++
++ /* Update page if required */
++
++ if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
++ ret = yaffs_readpage_nolock(filp, pg);
++
++ if (ret)
++ goto out;
++
++ /* Happy path return */
++ T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
++
++ return 0;
++
++out:
++ T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
++ if (space_held)
++ yaffs_release_space(filp);
++ if (pg) {
++ unlock_page(pg);
++ page_cache_release(pg);
++ }
++ return ret;
++}
++
++#else
++
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++ unsigned offset, unsigned to)
++{
++ T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
++
++ if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
++ return yaffs_readpage_nolock(f, pg);
++ return 0;
++}
++#endif
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned copied,
++ struct page *pg, void *fsdadata)
++{
++ int ret = 0;
++ void *addr, *kva;
++ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
++
++ kva = kmap(pg);
++ addr = kva + offset_into_page;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_write_end addr %x pos %x nBytes %d\n",
++ (unsigned) addr,
++ (int)pos, copied));
++
++ ret = yaffs_file_write(filp, addr, copied, &pos);
++
++ if (ret != copied) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_write_end not same size ret %d copied %d\n",
++ ret, copied));
++ SetPageError(pg);
++ ClearPageUptodate(pg);
++ } else {
++ SetPageUptodate(pg);
++ }
++
++ kunmap(pg);
++
++ yaffs_release_space(filp);
++ unlock_page(pg);
++ page_cache_release(pg);
++ return ret;
++}
++#else
++
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++ unsigned to)
++{
++ void *addr, *kva;
++
++ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
++ int nBytes = to - offset;
++ int nWritten;
++
++ unsigned spos = pos;
++ unsigned saddr;
++
++ kva = kmap(pg);
++ addr = kva + offset;
++
++ saddr = (unsigned) addr;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_commit_write addr %x pos %x nBytes %d\n",
++ saddr, spos, nBytes));
++
++ nWritten = yaffs_file_write(f, addr, nBytes, &pos);
++
++ if (nWritten != nBytes) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
++ nWritten, nBytes));
++ SetPageError(pg);
++ ClearPageUptodate(pg);
++ } else {
++ SetPageUptodate(pg);
++ }
++
++ kunmap(pg);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_commit_write returning %d\n",
++ nWritten == nBytes ? 0 : nWritten));
++
++ return nWritten == nBytes ? 0 : nWritten;
++}
++#endif
++
++
++static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
++{
++ if (inode && obj) {
++
++
++ /* Check mode against the variant type and attempt to repair if broken. */
++ __u32 mode = obj->yst_mode;
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ if (!S_ISREG(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFREG;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ if (!S_ISLNK(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFLNK;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ if (!S_ISDIR(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFDIR;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ default:
++ /* TODO? */
++ break;
++ }
++
++ inode->i_flags |= S_NOATIME;
++
++ inode->i_ino = obj->objectId;
++ inode->i_mode = obj->yst_mode;
++ inode->i_uid = obj->yst_uid;
++ inode->i_gid = obj->yst_gid;
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++ inode->i_blksize = inode->i_sb->s_blocksize;
++#endif
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++ inode->i_rdev = old_decode_dev(obj->yst_rdev);
++ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
++ inode->i_atime.tv_nsec = 0;
++ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
++ inode->i_mtime.tv_nsec = 0;
++ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
++ inode->i_ctime.tv_nsec = 0;
++#else
++ inode->i_rdev = obj->yst_rdev;
++ inode->i_atime = obj->yst_atime;
++ inode->i_mtime = obj->yst_mtime;
++ inode->i_ctime = obj->yst_ctime;
++#endif
++ inode->i_size = yaffs_GetObjectFileLength(obj);
++ inode->i_blocks = (inode->i_size + 511) >> 9;
++
++ inode->i_nlink = yaffs_GetObjectLinkCount(obj);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
++ inode->i_mode, inode->i_uid, inode->i_gid,
++ (int)inode->i_size, atomic_read(&inode->i_count)));
++
++ switch (obj->yst_mode & S_IFMT) {
++ default: /* fifo, device or socket */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ init_special_inode(inode, obj->yst_mode,
++ old_decode_dev(obj->yst_rdev));
++#else
++ init_special_inode(inode, obj->yst_mode,
++ (dev_t) (obj->yst_rdev));
++#endif
++ break;
++ case S_IFREG: /* file */
++ inode->i_op = &yaffs_file_inode_operations;
++ inode->i_fop = &yaffs_file_operations;
++ inode->i_mapping->a_ops =
++ &yaffs_file_address_operations;
++ break;
++ case S_IFDIR: /* directory */
++ inode->i_op = &yaffs_dir_inode_operations;
++ inode->i_fop = &yaffs_dir_operations;
++ break;
++ case S_IFLNK: /* symlink */
++ inode->i_op = &yaffs_symlink_inode_operations;
++ break;
++ }
++
++ yaffs_InodeToObjectLV(inode) = obj;
++
++ obj->myInode = inode;
++
++ } else {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_FileInode invalid parameters\n"));
++ }
++
++}
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++ yaffs_Object *obj)
++{
++ struct inode *inode;
++
++ if (!sb) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_get_inode for NULL super_block!!\n"));
++ return NULL;
++
++ }
++
++ if (!obj) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_get_inode for NULL object!!\n"));
++ return NULL;
++
++ }
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_get_inode for object %d\n", obj->objectId));
++
++ inode = Y_IGET(sb, obj->objectId);
++ if (IS_ERR(inode))
++ return NULL;
++
++ /* NB Side effect: iget calls back to yaffs_read_inode(). */
++ /* iget also increments the inode's i_count */
++ /* NB You can't be holding grossLock or deadlock will happen! */
++
++ return inode;
++}
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++ loff_t *pos)
++{
++ yaffs_Object *obj;
++ int nWritten, ipos;
++ struct inode *inode;
++ yaffs_Device *dev;
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ inode = f->f_dentry->d_inode;
++
++ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
++ ipos = inode->i_size;
++ else
++ ipos = *pos;
++
++ if (!obj)
++ T(YAFFS_TRACE_OS,
++ ("yaffs_file_write: hey obj is null!\n"));
++ else
++ T(YAFFS_TRACE_OS,
++ ("yaffs_file_write about to write writing %zu bytes"
++ "to object %d at %d\n",
++ n, obj->objectId, ipos));
++
++ nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_file_write writing %zu bytes, %d written at %d\n",
++ n, nWritten, ipos));
++
++ if (nWritten > 0) {
++ ipos += nWritten;
++ *pos = ipos;
++ if (ipos > inode->i_size) {
++ inode->i_size = ipos;
++ inode->i_blocks = (ipos + 511) >> 9;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_file_write size updated to %d bytes, "
++ "%d blocks\n",
++ ipos, (int)(inode->i_blocks)));
++ }
++
++ }
++ yaffs_GrossUnlock(dev);
++ return nWritten == 0 ? -ENOSPC : nWritten;
++}
++
++/* Space holding and freeing is done to ensure we have space available for write_begin/end */
++/* For now we just assume few parallel writes and check against a small number. */
++/* Todo: need to do this with a counter to handle parallel reads better */
++
++static ssize_t yaffs_hold_space(struct file *f)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++ int nFreeChunks;
++
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
++
++ yaffs_GrossUnlock(dev);
++
++ return (nFreeChunks > 20) ? 1 : 0;
++}
++
++static void yaffs_release_space(struct file *f)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++
++ yaffs_GrossUnlock(dev);
++}
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++ struct inode *inode = f->f_dentry->d_inode;
++ unsigned long offset, curoffs;
++ struct ylist_head *i;
++ yaffs_Object *l;
++
++ char name[YAFFS_MAX_NAME_LENGTH + 1];
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ offset = f->f_pos;
++
++ T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
++
++ if (offset == 0) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_readdir: entry . ino %d \n",
++ (int)inode->i_ino));
++ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
++ goto out;
++ offset++;
++ f->f_pos++;
++ }
++ if (offset == 1) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_readdir: entry .. ino %d \n",
++ (int)f->f_dentry->d_parent->d_inode->i_ino));
++ if (filldir(dirent, "..", 2, offset,
++ f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
++ goto out;
++ offset++;
++ f->f_pos++;
++ }
++
++ curoffs = 1;
++
++ /* If the directory has changed since the open or last call to
++ readdir, rewind to after the 2 canned entries. */
++
++ if (f->f_version != inode->i_version) {
++ offset = 2;
++ f->f_pos = offset;
++ f->f_version = inode->i_version;
++ }
++
++ ylist_for_each(i, &obj->variant.directoryVariant.children) {
++ curoffs++;
++ if (curoffs >= offset) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++
++ yaffs_GetObjectName(l, name,
++ YAFFS_MAX_NAME_LENGTH + 1);
++ T(YAFFS_TRACE_OS,
++ ("yaffs_readdir: %s inode %d\n", name,
++ yaffs_GetObjectInode(l)));
++
++ if (filldir(dirent,
++ name,
++ strlen(name),
++ offset,
++ yaffs_GetObjectInode(l),
++ yaffs_GetObjectType(l)) < 0)
++ goto up_and_out;
++
++ offset++;
++ f->f_pos++;
++ }
++ }
++
++up_and_out:
++out:
++ yaffs_GrossUnlock(dev);
++
++ return 0;
++}
++
++/*
++ * File creation. Allocate an inode, and we're done..
++ */
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++#define YCRED(x) x
++#else
++#define YCRED(x) (x->cred)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ dev_t rdev)
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ int rdev)
++#endif
++{
++ struct inode *inode;
++
++ yaffs_Object *obj = NULL;
++ yaffs_Device *dev;
++
++ yaffs_Object *parent = yaffs_InodeToObject(dir);
++
++ int error = -ENOSPC;
++ uid_t uid = YCRED(current)->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
++ mode |= S_ISGID;
++
++ if (parent) {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_mknod: parent object %d type %d\n",
++ parent->objectId, parent->variantType));
++ } else {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_mknod: could not get parent object\n"));
++ return -EPERM;
++ }
++
++ T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
++ "mode %x dev %x\n",
++ dentry->d_name.name, mode, rdev));
++
++ dev = parent->myDev;
++
++ yaffs_GrossLock(dev);
++
++ switch (mode & S_IFMT) {
++ default:
++ /* Special (socket, fifo, device...) */
++ T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
++ gid, old_encode_dev(rdev));
++#else
++ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
++ gid, rdev);
++#endif
++ break;
++ case S_IFREG: /* file */
++ T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
++ obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
++ gid);
++ break;
++ case S_IFDIR: /* directory */
++ T(YAFFS_TRACE_OS,
++ ("yaffs_mknod: making directory\n"));
++ obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
++ uid, gid);
++ break;
++ case S_IFLNK: /* symlink */
++ T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
++ obj = NULL; /* Do we ever get here? */
++ break;
++ }
++
++ /* Can not call yaffs_get_inode() with gross lock held */
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
++ d_instantiate(dentry, inode);
++ T(YAFFS_TRACE_OS,
++ ("yaffs_mknod created object %d count = %d\n",
++ obj->objectId, atomic_read(&inode->i_count)));
++ error = 0;
++ } else {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_mknod failed making object\n"));
++ error = -ENOMEM;
++ }
++
++ return error;
++}
++
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
++{
++ int retVal;
++ T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
++ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
++ return retVal;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *n)
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
++#endif
++{
++ T(YAFFS_TRACE_OS, ("yaffs_create\n"));
++ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
++}
++
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
++{
++ int retVal;
++
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
++ dentry->d_name.name));
++
++ dev = yaffs_InodeToObject(dir)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
++
++ if (retVal == YAFFS_OK) {
++ dentry->d_inode->i_nlink--;
++ dir->i_version++;
++ yaffs_GrossUnlock(dev);
++ mark_inode_dirty(dentry->d_inode);
++ return 0;
++ }
++ yaffs_GrossUnlock(dev);
++ return -ENOTEMPTY;
++}
++
++/*
++ * Create a link...
++ */
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++ struct dentry *dentry)
++{
++ struct inode *inode = old_dentry->d_inode;
++ yaffs_Object *obj = NULL;
++ yaffs_Object *link = NULL;
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS, ("yaffs_link\n"));
++
++ obj = yaffs_InodeToObject(inode);
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
++ link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
++ obj);
++
++ if (link) {
++ old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
++ d_instantiate(dentry, old_dentry->d_inode);
++ atomic_inc(&old_dentry->d_inode->i_count);
++ T(YAFFS_TRACE_OS,
++ ("yaffs_link link count %d i_count %d\n",
++ old_dentry->d_inode->i_nlink,
++ atomic_read(&old_dentry->d_inode->i_count)));
++ }
++
++ yaffs_GrossUnlock(dev);
++
++ if (link)
++ return 0;
++
++ return -EPERM;
++}
++
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++ const char *symname)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++ uid_t uid = YCRED(current)->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++ T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
++
++ dev = yaffs_InodeToObject(dir)->myDev;
++ yaffs_GrossLock(dev);
++ obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
++ S_IFLNK | S_IRWXUGO, uid, gid, symname);
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ struct inode *inode;
++
++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++ d_instantiate(dentry, inode);
++ T(YAFFS_TRACE_OS, ("symlink created OK\n"));
++ return 0;
++ } else {
++ T(YAFFS_TRACE_OS, ("symlink not created\n"));
++ }
++
++ return -ENOMEM;
++}
++
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++ int datasync)
++{
++
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++ obj = yaffs_DentryToObject(dentry);
++
++ dev = obj->myDev;
++
++ T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
++ yaffs_GrossLock(dev);
++ yaffs_FlushFile(obj, 1);
++ yaffs_GrossUnlock(dev);
++ return 0;
++}
++
++/*
++ * The VFS layer already does all the dentry stuff for rename.
++ *
++ * NB: POSIX says you can rename an object over an old object of the same name
++ */
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry)
++{
++ yaffs_Device *dev;
++ int retVal = YAFFS_FAIL;
++ yaffs_Object *target;
++
++ T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
++ dev = yaffs_InodeToObject(old_dir)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ /* Check if the target is an existing directory that is not empty. */
++ target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
++ new_dentry->d_name.name);
++
++
++
++ if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
++ !ylist_empty(&target->variant.directoryVariant.children)) {
++
++ T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
++
++ retVal = YAFFS_FAIL;
++ } else {
++ /* Now does unlinking internally using shadowing mechanism */
++ T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
++
++ retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
++ old_dentry->d_name.name,
++ yaffs_InodeToObject(new_dir),
++ new_dentry->d_name.name);
++ }
++ yaffs_GrossUnlock(dev);
++
++ if (retVal == YAFFS_OK) {
++ if (target) {
++ new_dentry->d_inode->i_nlink--;
++ mark_inode_dirty(new_dentry->d_inode);
++ }
++
++ return 0;
++ } else {
++ return -ENOTEMPTY;
++ }
++}
++
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
++{
++ struct inode *inode = dentry->d_inode;
++ int error;
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_setattr of object %d\n",
++ yaffs_InodeToObject(inode)->objectId));
++
++ error = inode_change_ok(inode, attr);
++ if (error == 0) {
++ dev = yaffs_InodeToObject(inode)->myDev;
++ yaffs_GrossLock(dev);
++ if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
++ YAFFS_OK) {
++ error = 0;
++ } else {
++ error = -EPERM;
++ }
++ yaffs_GrossUnlock(dev);
++ if (!error)
++ error = inode_setattr(inode, attr);
++ }
++ return error;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
++{
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++ struct super_block *sb = dentry->d_sb;
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++#endif
++
++ T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
++
++ yaffs_GrossLock(dev);
++
++ buf->f_type = YAFFS_MAGIC;
++ buf->f_bsize = sb->s_blocksize;
++ buf->f_namelen = 255;
++
++ if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
++ /* Do this if chunk size is not a power of 2 */
++
++ uint64_t bytesInDev;
++ uint64_t bytesFree;
++
++ bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
++ ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
++
++ do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
++ buf->f_blocks = bytesInDev;
++
++ bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
++ ((uint64_t)(dev->nDataBytesPerChunk));
++
++ do_div(bytesFree, sb->s_blocksize);
++
++ buf->f_bfree = bytesFree;
++
++ } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
++
++ buf->f_blocks =
++ (dev->endBlock - dev->startBlock + 1) *
++ dev->nChunksPerBlock /
++ (sb->s_blocksize / dev->nDataBytesPerChunk);
++ buf->f_bfree =
++ yaffs_GetNumberOfFreeChunks(dev) /
++ (sb->s_blocksize / dev->nDataBytesPerChunk);
++ } else {
++ buf->f_blocks =
++ (dev->endBlock - dev->startBlock + 1) *
++ dev->nChunksPerBlock *
++ (dev->nDataBytesPerChunk / sb->s_blocksize);
++
++ buf->f_bfree =
++ yaffs_GetNumberOfFreeChunks(dev) *
++ (dev->nDataBytesPerChunk / sb->s_blocksize);
++ }
++
++ buf->f_files = 0;
++ buf->f_ffree = 0;
++ buf->f_bavail = buf->f_bfree;
++
++ yaffs_GrossUnlock(dev);
++ return 0;
++}
++
++
++static int yaffs_do_sync_fs(struct super_block *sb)
++{
++
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++ T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
++
++ if (sb->s_dirt) {
++ yaffs_GrossLock(dev);
++
++ if (dev) {
++ yaffs_FlushEntireDeviceCache(dev);
++ yaffs_CheckpointSave(dev);
++ }
++
++ yaffs_GrossUnlock(dev);
++
++ sb->s_dirt = 0;
++ }
++ return 0;
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static void yaffs_write_super(struct super_block *sb)
++#else
++static int yaffs_write_super(struct super_block *sb)
++#endif
++{
++
++ T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
++ if (yaffs_auto_checkpoint >= 2)
++ yaffs_do_sync_fs(sb);
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
++ return 0;
++#endif
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait)
++#else
++static int yaffs_sync_fs(struct super_block *sb)
++#endif
++{
++ T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
++
++ if (yaffs_auto_checkpoint >= 1)
++ yaffs_do_sync_fs(sb);
++
++ return 0;
++}
++
++#ifdef YAFFS_USE_OWN_IGET
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
++{
++ struct inode *inode;
++ yaffs_Object *obj;
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_iget for %lu\n", ino));
++
++ inode = iget_locked(sb, ino);
++ if (!inode)
++ return ERR_PTR(-ENOMEM);
++ if (!(inode->i_state & I_NEW))
++ return inode;
++
++ /* NB This is called as a side effect of other functions, but
++ * we had to release the lock to prevent deadlocks, so
++ * need to lock again.
++ */
++
++ yaffs_GrossLock(dev);
++
++ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
++
++ yaffs_FillInodeFromObject(inode, obj);
++
++ yaffs_GrossUnlock(dev);
++
++ unlock_new_inode(inode);
++ return inode;
++}
++
++#else
++
++static void yaffs_read_inode(struct inode *inode)
++{
++ /* NB This is called as a side effect of other functions, but
++ * we had to release the lock to prevent deadlocks, so
++ * need to lock again.
++ */
++
++ yaffs_Object *obj;
++ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_read_inode for %d\n", (int)inode->i_ino));
++
++ yaffs_GrossLock(dev);
++
++ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
++
++ yaffs_FillInodeFromObject(inode, obj);
++
++ yaffs_GrossUnlock(dev);
++}
++
++#endif
++
++static YLIST_HEAD(yaffs_dev_list);
++
++#if 0 /* not used */
++static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ if (*flags & MS_RDONLY) {
++ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_remount_fs: %s: RO\n", dev->name));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushEntireDeviceCache(dev);
++
++ yaffs_CheckpointSave(dev);
++
++ if (mtd->sync)
++ mtd->sync(mtd);
++
++ yaffs_GrossUnlock(dev);
++ } else {
++ T(YAFFS_TRACE_OS,
++ ("yaffs_remount_fs: %s: RW\n", dev->name));
++ }
++
++ return 0;
++}
++#endif
++
++static void yaffs_put_super(struct super_block *sb)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushEntireDeviceCache(dev);
++
++ yaffs_CheckpointSave(dev);
++
++ if (dev->putSuperFunc)
++ dev->putSuperFunc(sb);
++
++ yaffs_Deinitialise(dev);
++
++ yaffs_GrossUnlock(dev);
++
++ /* we assume this is protected by lock_kernel() in mount/umount */
++ ylist_del(&dev->devList);
++
++ if (dev->spareBuffer) {
++ YFREE(dev->spareBuffer);
++ dev->spareBuffer = NULL;
++ }
++
++ kfree(dev);
++}
++
++
++static void yaffs_MTDPutSuper(struct super_block *sb)
++{
++ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
++
++ if (mtd->sync)
++ mtd->sync(mtd);
++
++ put_mtd_device(mtd);
++}
++
++
++static void yaffs_MarkSuperBlockDirty(void *vsb)
++{
++ struct super_block *sb = (struct super_block *)vsb;
++
++ T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
++ if (sb)
++ sb->s_dirt = 1;
++}
++
++typedef struct {
++ int inband_tags;
++ int skip_checkpoint_read;
++ int skip_checkpoint_write;
++ int no_cache;
++} yaffs_options;
++
++#define MAX_OPT_LEN 20
++static int yaffs_parse_options(yaffs_options *options, const char *options_str)
++{
++ char cur_opt[MAX_OPT_LEN + 1];
++ int p;
++ int error = 0;
++
++ /* Parse through the options which is a comma seperated list */
++
++ while (options_str && *options_str && !error) {
++ memset(cur_opt, 0, MAX_OPT_LEN + 1);
++ p = 0;
++
++ while (*options_str && *options_str != ',') {
++ if (p < MAX_OPT_LEN) {
++ cur_opt[p] = *options_str;
++ p++;
++ }
++ options_str++;
++ }
++
++ if (!strcmp(cur_opt, "inband-tags"))
++ options->inband_tags = 1;
++ else if (!strcmp(cur_opt, "no-cache"))
++ options->no_cache = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint-read"))
++ options->skip_checkpoint_read = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint-write"))
++ options->skip_checkpoint_write = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint")) {
++ options->skip_checkpoint_read = 1;
++ options->skip_checkpoint_write = 1;
++ } else {
++ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
++ cur_opt);
++ error = 1;
++ }
++ }
++
++ return error;
++}
++
++static struct super_block *yaffs_internal_read_super(int yaffsVersion,
++ struct super_block *sb,
++ void *data, int silent)
++{
++ int nBlocks;
++ struct inode *inode = NULL;
++ struct dentry *root;
++ yaffs_Device *dev = 0;
++ char devname_buf[BDEVNAME_SIZE + 1];
++ struct mtd_info *mtd;
++ int err;
++ char *data_str = (char *)data;
++
++ yaffs_options options;
++
++ sb->s_magic = YAFFS_MAGIC;
++ sb->s_op = &yaffs_super_ops;
++ sb->s_flags |= MS_NOATIME;
++
++ if (!sb)
++ printk(KERN_INFO "yaffs: sb is NULL\n");
++ else if (!sb->s_dev)
++ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
++ else if (!yaffs_devname(sb, devname_buf))
++ printk(KERN_INFO "yaffs: devname is NULL\n");
++ else
++ printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
++ sb->s_dev,
++ yaffs_devname(sb, devname_buf));
++
++ if (!data_str)
++ data_str = "";
++
++ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
++
++ memset(&options, 0, sizeof(options));
++
++ if (yaffs_parse_options(&options, data_str)) {
++ /* Option parsing failed */
++ return NULL;
++ }
++
++
++ sb->s_blocksize = PAGE_CACHE_SIZE;
++ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
++ T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
++ T(YAFFS_TRACE_OS,
++ ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
++
++#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
++ T(YAFFS_TRACE_OS,
++ ("yaffs: Write verification disabled. All guarantees "
++ "null and void\n"));
++#endif
++
++ T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
++ "\"%s\"\n",
++ MAJOR(sb->s_dev), MINOR(sb->s_dev),
++ yaffs_devname(sb, devname_buf)));
++
++ /* Check it's an mtd device..... */
++ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
++ return NULL; /* This isn't an mtd device */
++
++ /* Get the device */
++ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
++ if (!mtd) {
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device #%u doesn't appear to exist\n",
++ MINOR(sb->s_dev)));
++ return NULL;
++ }
++ /* Check it's NAND */
++ if (mtd->type != MTD_NANDFLASH) {
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
++ return NULL;
++ }
++
++ T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
++ T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
++ T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
++ T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
++ T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
++ T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
++ T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
++ T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
++ T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
++ T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++ T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
++#else
++ T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
++#endif
++
++#ifdef CONFIG_YAFFS_AUTO_YAFFS2
++
++ if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
++ T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
++ yaffsVersion = 2;
++ }
++
++ /* Added NCB 26/5/2006 for completeness */
++ if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
++ T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
++ yaffsVersion = 1;
++ }
++
++#endif
++
++ if (yaffsVersion == 2) {
++ /* Check for version 2 style functions */
++ if (!mtd->erase ||
++ !mtd->block_isbad ||
++ !mtd->block_markbad ||
++ !mtd->read ||
++ !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ !mtd->read_oob || !mtd->write_oob) {
++#else
++ !mtd->write_ecc ||
++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device does not support required "
++ "functions\n"));;
++ return NULL;
++ }
++
++ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
++ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
++ !options.inband_tags) {
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device does not have the "
++ "right page sizes\n"));
++ return NULL;
++ }
++ } else {
++ /* Check for V1 style functions */
++ if (!mtd->erase ||
++ !mtd->read ||
++ !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ !mtd->read_oob || !mtd->write_oob) {
++#else
++ !mtd->write_ecc ||
++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device does not support required "
++ "functions\n"));;
++ return NULL;
++ }
++
++ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
++ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs: MTD device does not support have the "
++ "right page sizes\n"));
++ return NULL;
++ }
++ }
++
++ /* OK, so if we got here, we have an MTD that's NAND and looks
++ * like it has the right capabilities
++ * Set the yaffs_Device up for mtd
++ */
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
++#else
++ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
++#endif
++ if (!dev) {
++ /* Deep shit could not allocate device structure */
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs_read_super: Failed trying to allocate "
++ "yaffs_Device. \n"));
++ return NULL;
++ }
++
++ memset(dev, 0, sizeof(yaffs_Device));
++ dev->genericDevice = mtd;
++ dev->name = mtd->name;
++
++ /* Set up the memory size parameters.... */
++
++ nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
++
++ dev->startBlock = 0;
++ dev->endBlock = nBlocks - 1;
++ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
++ dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
++ dev->nReservedBlocks = 5;
++ dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
++ dev->inbandTags = options.inband_tags;
++
++ /* ... and the functions. */
++ if (yaffsVersion == 2) {
++ dev->writeChunkWithTagsToNAND =
++ nandmtd2_WriteChunkWithTagsToNAND;
++ dev->readChunkWithTagsFromNAND =
++ nandmtd2_ReadChunkWithTagsFromNAND;
++ dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
++ dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
++ dev->spareBuffer = YMALLOC(mtd->oobsize);
++ dev->isYaffs2 = 1;
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ dev->totalBytesPerChunk = mtd->writesize;
++ dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
++#else
++ dev->totalBytesPerChunk = mtd->oobblock;
++ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
++#endif
++ nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
++
++ dev->startBlock = 0;
++ dev->endBlock = nBlocks - 1;
++ } else {
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ /* use the MTD interface in yaffs_mtdif1.c */
++ dev->writeChunkWithTagsToNAND =
++ nandmtd1_WriteChunkWithTagsToNAND;
++ dev->readChunkWithTagsFromNAND =
++ nandmtd1_ReadChunkWithTagsFromNAND;
++ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
++ dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
++#else
++ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
++ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
++#endif
++ dev->isYaffs2 = 0;
++ }
++ /* ... and common functions */
++ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
++ dev->initialiseNAND = nandmtd_InitialiseNAND;
++
++ dev->putSuperFunc = yaffs_MTDPutSuper;
++
++ dev->superBlock = (void *)sb;
++ dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
++
++
++#ifndef CONFIG_YAFFS_DOES_ECC
++ dev->useNANDECC = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
++ dev->wideTnodesDisabled = 1;
++#endif
++
++ dev->skipCheckpointRead = options.skip_checkpoint_read;
++ dev->skipCheckpointWrite = options.skip_checkpoint_write;
++
++ /* we assume this is protected by lock_kernel() in mount/umount */
++ ylist_add_tail(&dev->devList, &yaffs_dev_list);
++
++ init_MUTEX(&dev->grossLock);
++
++ yaffs_GrossLock(dev);
++
++ err = yaffs_GutsInitialise(dev);
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_read_super: guts initialised %s\n",
++ (err == YAFFS_OK) ? "OK" : "FAILED"));
++
++ /* Release lock before yaffs_get_inode() */
++ yaffs_GrossUnlock(dev);
++
++ /* Create root inode */
++ if (err == YAFFS_OK)
++ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
++ yaffs_Root(dev));
++
++ if (!inode)
++ return NULL;
++
++ inode->i_op = &yaffs_dir_inode_operations;
++ inode->i_fop = &yaffs_dir_operations;
++
++ T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
++
++ root = d_alloc_root(inode);
++
++ T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
++
++ if (!root) {
++ iput(inode);
++ return NULL;
++ }
++ sb->s_root = root;
++ sb->s_dirt = !dev->isCheckpointed;
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
++
++ T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
++ return sb;
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data, struct vfsmount *mnt)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs_fs_type = {
++ .owner = THIS_MODULE,
++ .name = "yaffs",
++ .get_sb = yaffs_read_super,
++ .kill_sb = kill_block_super,
++ .fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(1, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
++ FS_REQUIRES_DEV);
++#endif
++
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs2_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name, void *data,
++ struct vfsmount *mnt)
++{
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs2_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs2_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs2_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs2_fs_type = {
++ .owner = THIS_MODULE,
++ .name = "yaffs2",
++ .get_sb = yaffs2_read_super,
++ .kill_sb = kill_block_super,
++ .fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs2_read_super(struct super_block *sb,
++ void *data, int silent)
++{
++ return yaffs_internal_read_super(2, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
++ FS_REQUIRES_DEV);
++#endif
++
++#endif /* CONFIG_YAFFS_YAFFS2 */
++
++static struct proc_dir_entry *my_proc_entry;
++
++static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
++{
++ buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
++ buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
++ buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
++ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
++ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
++ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
++ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
++ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
++ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
++ buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
++ buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
++ buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
++ buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
++ buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
++ buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
++ buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
++ buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
++ buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
++ buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
++ buf += sprintf(buf, "passiveGCs......... %d\n",
++ dev->passiveGarbageCollections);
++ buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
++ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
++ buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
++ buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
++ buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
++ buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
++ buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
++ buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
++ buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
++ buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
++ buf +=
++ sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
++ buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
++ buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
++ buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
++
++ return buf;
++}
++
++static int yaffs_proc_read(char *page,
++ char **start,
++ off_t offset, int count, int *eof, void *data)
++{
++ struct ylist_head *item;
++ char *buf = page;
++ int step = offset;
++ int n = 0;
++
++ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
++ * We use 'offset' (*ppos) to indicate where we are in devList.
++ * This also assumes the user has posted a read buffer large
++ * enough to hold the complete output; but that's life in /proc.
++ */
++
++ *(int *)start = 1;
++
++ /* Print header first */
++ if (step == 0) {
++ buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
++ "\n%s\n%s\n", yaffs_fs_c_version,
++ yaffs_guts_c_version);
++ }
++
++ /* hold lock_kernel while traversing yaffs_dev_list */
++ lock_kernel();
++
++ /* Locate and print the Nth entry. Order N-squared but N is small. */
++ ylist_for_each(item, &yaffs_dev_list) {
++ yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
++ if (n < step) {
++ n++;
++ continue;
++ }
++ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
++ buf = yaffs_dump_dev(buf, dev);
++ break;
++ }
++ unlock_kernel();
++
++ return buf - page < count ? buf - page : count;
++}
++
++/**
++ * Set the verbosity of the warnings and error messages.
++ *
++ * Note that the names can only be a..z or _ with the current code.
++ */
++
++static struct {
++ char *mask_name;
++ unsigned mask_bitfield;
++} mask_flags[] = {
++ {"allocate", YAFFS_TRACE_ALLOCATE},
++ {"always", YAFFS_TRACE_ALWAYS},
++ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
++ {"buffers", YAFFS_TRACE_BUFFERS},
++ {"bug", YAFFS_TRACE_BUG},
++ {"checkpt", YAFFS_TRACE_CHECKPOINT},
++ {"deletion", YAFFS_TRACE_DELETION},
++ {"erase", YAFFS_TRACE_ERASE},
++ {"error", YAFFS_TRACE_ERROR},
++ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
++ {"gc", YAFFS_TRACE_GC},
++ {"mtd", YAFFS_TRACE_MTD},
++ {"nandaccess", YAFFS_TRACE_NANDACCESS},
++ {"os", YAFFS_TRACE_OS},
++ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
++ {"scan", YAFFS_TRACE_SCAN},
++ {"tracing", YAFFS_TRACE_TRACING},
++
++ {"verify", YAFFS_TRACE_VERIFY},
++ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
++ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
++ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
++
++ {"write", YAFFS_TRACE_WRITE},
++ {"all", 0xffffffff},
++ {"none", 0},
++ {NULL, 0},
++};
++
++#define MAX_MASK_NAME_LENGTH 40
++static int yaffs_proc_write(struct file *file, const char *buf,
++ unsigned long count, void *data)
++{
++ unsigned rg = 0, mask_bitfield;
++ char *end;
++ char *mask_name;
++ const char *x;
++ char substring[MAX_MASK_NAME_LENGTH + 1];
++ int i;
++ int done = 0;
++ int add, len = 0;
++ int pos = 0;
++
++ rg = yaffs_traceMask;
++
++ while (!done && (pos < count)) {
++ done = 1;
++ while ((pos < count) && isspace(buf[pos]))
++ pos++;
++
++ switch (buf[pos]) {
++ case '+':
++ case '-':
++ case '=':
++ add = buf[pos];
++ pos++;
++ break;
++
++ default:
++ add = ' ';
++ break;
++ }
++ mask_name = NULL;
++
++ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
++
++ if (end > buf + pos) {
++ mask_name = "numeral";
++ len = end - (buf + pos);
++ pos += len;
++ done = 0;
++ } else {
++ for (x = buf + pos, i = 0;
++ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
++ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
++ substring[i] = *x;
++ substring[i] = '\0';
++
++ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++ if (strcmp(substring, mask_flags[i].mask_name) == 0) {
++ mask_name = mask_flags[i].mask_name;
++ mask_bitfield = mask_flags[i].mask_bitfield;
++ done = 0;
++ break;
++ }
++ }
++ }
++
++ if (mask_name != NULL) {
++ done = 0;
++ switch (add) {
++ case '-':
++ rg &= ~mask_bitfield;
++ break;
++ case '+':
++ rg |= mask_bitfield;
++ break;
++ case '=':
++ rg = mask_bitfield;
++ break;
++ default:
++ rg |= mask_bitfield;
++ break;
++ }
++ }
++ }
++
++ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
++
++ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
++
++ if (rg & YAFFS_TRACE_ALWAYS) {
++ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++ char flag;
++ flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
++ printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
++ }
++ }
++
++ return count;
++}
++
++/* Stuff to handle installation of file systems */
++struct file_system_to_install {
++ struct file_system_type *fst;
++ int installed;
++};
++
++static struct file_system_to_install fs_to_install[] = {
++ {&yaffs_fs_type, 0},
++ {&yaffs2_fs_type, 0},
++ {NULL, 0}
++};
++
++static int __init init_yaffs_fs(void)
++{
++ int error = 0;
++ struct file_system_to_install *fsinst;
++
++ T(YAFFS_TRACE_ALWAYS,
++ ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
++
++ /* Install the proc_fs entry */
++ my_proc_entry = create_proc_entry("yaffs",
++ S_IRUGO | S_IFREG,
++ YPROC_ROOT);
++
++ if (my_proc_entry) {
++ my_proc_entry->write_proc = yaffs_proc_write;
++ my_proc_entry->read_proc = yaffs_proc_read;
++ my_proc_entry->data = NULL;
++ } else
++ return -ENOMEM;
++
++ /* Now add the file system entries */
++
++ fsinst = fs_to_install;
++
++ while (fsinst->fst && !error) {
++ error = register_filesystem(fsinst->fst);
++ if (!error)
++ fsinst->installed = 1;
++ fsinst++;
++ }
++
++ /* Any errors? uninstall */
++ if (error) {
++ fsinst = fs_to_install;
++
++ while (fsinst->fst) {
++ if (fsinst->installed) {
++ unregister_filesystem(fsinst->fst);
++ fsinst->installed = 0;
++ }
++ fsinst++;
++ }
++ }
++
++ return error;
++}
++
++static void __exit exit_yaffs_fs(void)
++{
++
++ struct file_system_to_install *fsinst;
++
++ T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
++ " removing. \n"));
++
++ remove_proc_entry("yaffs", YPROC_ROOT);
++
++ fsinst = fs_to_install;
++
++ while (fsinst->fst) {
++ if (fsinst->installed) {
++ unregister_filesystem(fsinst->fst);
++ fsinst->installed = 0;
++ }
++ fsinst++;
++ }
++}
++
++module_init(init_yaffs_fs)
++module_exit(exit_yaffs_fs)
++
++MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
++MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
++MODULE_LICENSE("GPL");
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_getblockinfo.h linux-2.6.32/fs/yaffs2/yaffs_getblockinfo.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_getblockinfo.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_getblockinfo.h 2010-01-30 20:35:01.373074589 +0100
+@@ -0,0 +1,34 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_GETBLOCKINFO_H__
++#define __YAFFS_GETBLOCKINFO_H__
++
++#include "yaffs_guts.h"
++
++/* Function to manipulate block info */
++static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
++ blk));
++ YBUG();
++ }
++ return &dev->blockInfo[blk - dev->internalStartBlock];
++}
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_guts.c linux-2.6.32/fs/yaffs2/yaffs_guts.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_guts.c 2010-01-30 20:35:01.393075518 +0100
+@@ -0,0 +1,7552 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++const char *yaffs_guts_c_version =
++ "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $";
++
++#include "yportenv.h"
++
++#include "yaffsinterface.h"
++#include "yaffs_guts.h"
++#include "yaffs_tagsvalidity.h"
++#include "yaffs_getblockinfo.h"
++
++#include "yaffs_tagscompat.h"
++#ifndef CONFIG_YAFFS_USE_OWN_SORT
++#include "yaffs_qsort.h"
++#endif
++#include "yaffs_nand.h"
++
++#include "yaffs_checkptrw.h"
++
++#include "yaffs_nand.h"
++#include "yaffs_packedtags2.h"
++
++
++#define YAFFS_PASSIVE_GC_CHUNKS 2
++
++#include "yaffs_ecc.h"
++
++
++/* Robustification (if it ever comes about...) */
++static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
++ int erasedOk);
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags);
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_ExtendedTags *tags);
++
++/* Other local prototypes */
++static int yaffs_UnlinkObject(yaffs_Object *obj);
++static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
++
++static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
++
++static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
++ const __u8 *buffer,
++ yaffs_ExtendedTags *tags,
++ int useReserve);
++static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
++ int chunkInNAND, int inScan);
++
++static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
++ yaffs_ObjectType type);
++static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
++ yaffs_Object *obj);
++static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
++ int force, int isShrink, int shadows);
++static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
++static int yaffs_CheckStructures(void);
++static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
++ int chunkOffset, int *limit);
++static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
++
++static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
++
++
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND);
++
++static int yaffs_UnlinkWorker(yaffs_Object *obj);
++
++static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
++ int chunkInObject);
++
++static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
++ yaffs_BlockInfo **blockUsedPtr);
++
++static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
++
++static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
++
++static void yaffs_VerifyDirectory(yaffs_Object *directory);
++#ifdef YAFFS_PARANOID
++static int yaffs_CheckFileSanity(yaffs_Object *in);
++#else
++#define yaffs_CheckFileSanity(in)
++#endif
++
++static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
++static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
++
++static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
++
++static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
++ yaffs_ExtendedTags *tags);
++
++static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
++ unsigned pos);
++static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId);
++
++
++/* Function to calculate chunk and offset */
++
++static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
++ __u32 *offsetOut)
++{
++ int chunk;
++ __u32 offset;
++
++ chunk = (__u32)(addr >> dev->chunkShift);
++
++ if (dev->chunkDiv == 1) {
++ /* easy power of 2 case */
++ offset = (__u32)(addr & dev->chunkMask);
++ } else {
++ /* Non power-of-2 case */
++
++ loff_t chunkBase;
++
++ chunk /= dev->chunkDiv;
++
++ chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
++ offset = (__u32)(addr - chunkBase);
++ }
++
++ *chunkOut = chunk;
++ *offsetOut = offset;
++}
++
++/* Function to return the number of shifts for a power of 2 greater than or
++ * equal to the given number
++ * Note we don't try to cater for all possible numbers and this does not have to
++ * be hellishly efficient.
++ */
++
++static __u32 ShiftsGE(__u32 x)
++{
++ int extraBits;
++ int nShifts;
++
++ nShifts = extraBits = 0;
++
++ while (x > 1) {
++ if (x & 1)
++ extraBits++;
++ x >>= 1;
++ nShifts++;
++ }
++
++ if (extraBits)
++ nShifts++;
++
++ return nShifts;
++}
++
++/* Function to return the number of shifts to get a 1 in bit 0
++ */
++
++static __u32 Shifts(__u32 x)
++{
++ int nShifts;
++
++ nShifts = 0;
++
++ if (!x)
++ return 0;
++
++ while (!(x&1)) {
++ x >>= 1;
++ nShifts++;
++ }
++
++ return nShifts;
++}
++
++
++
++/*
++ * Temporary buffer manipulations.
++ */
++
++static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
++{
++ int i;
++ __u8 *buf = (__u8 *)1;
++
++ memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
++
++ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
++ dev->tempBuffer[i].line = 0; /* not in use */
++ dev->tempBuffer[i].buffer = buf =
++ YMALLOC_DMA(dev->totalBytesPerChunk);
++ }
++
++ return buf ? YAFFS_OK : YAFFS_FAIL;
++}
++
++__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
++{
++ int i, j;
++
++ dev->tempInUse++;
++ if (dev->tempInUse > dev->maxTemp)
++ dev->maxTemp = dev->tempInUse;
++
++ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
++ if (dev->tempBuffer[i].line == 0) {
++ dev->tempBuffer[i].line = lineNo;
++ if ((i + 1) > dev->maxTemp) {
++ dev->maxTemp = i + 1;
++ for (j = 0; j <= i; j++)
++ dev->tempBuffer[j].maxLine =
++ dev->tempBuffer[j].line;
++ }
++
++ return dev->tempBuffer[i].buffer;
++ }
++ }
++
++ T(YAFFS_TRACE_BUFFERS,
++ (TSTR("Out of temp buffers at line %d, other held by lines:"),
++ lineNo));
++ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
++
++ T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
++
++ /*
++ * If we got here then we have to allocate an unmanaged one
++ * This is not good.
++ */
++
++ dev->unmanagedTempAllocations++;
++ return YMALLOC(dev->nDataBytesPerChunk);
++
++}
++
++void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
++ int lineNo)
++{
++ int i;
++
++ dev->tempInUse--;
++
++ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
++ if (dev->tempBuffer[i].buffer == buffer) {
++ dev->tempBuffer[i].line = 0;
++ return;
++ }
++ }
++
++ if (buffer) {
++ /* assume it is an unmanaged one. */
++ T(YAFFS_TRACE_BUFFERS,
++ (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
++ lineNo));
++ YFREE(buffer);
++ dev->unmanagedTempDeallocations++;
++ }
++
++}
++
++/*
++ * Determine if we have a managed buffer.
++ */
++int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
++{
++ int i;
++
++ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
++ if (dev->tempBuffer[i].buffer == buffer)
++ return 1;
++ }
++
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].data == buffer)
++ return 1;
++ }
++
++ if (buffer == dev->checkpointBuffer)
++ return 1;
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
++ return 0;
++}
++
++
++
++/*
++ * Chunk bitmap manipulations
++ */
++
++static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
++ blk));
++ YBUG();
++ }
++ return dev->chunkBits +
++ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
++}
++
++static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
++ chunk < 0 || chunk >= dev->nChunksPerBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
++ blk, chunk));
++ YBUG();
++ }
++}
++
++static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ memset(blkBits, 0, dev->chunkBitmapStride);
++}
++
++static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++}
++
++static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ blkBits[chunk / 8] |= (1 << (chunk & 7));
++}
++
++static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++}
++
++static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ if (*blkBits)
++ return 1;
++ blkBits++;
++ }
++ return 0;
++}
++
++static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ int n = 0;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ __u8 x = *blkBits;
++ while (x) {
++ if (x & 1)
++ n++;
++ x >>= 1;
++ }
++
++ blkBits++;
++ }
++ return n;
++}
++
++/*
++ * Verification code
++ */
++
++static int yaffs_SkipVerification(yaffs_Device *dev)
++{
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_SkipFullVerification(yaffs_Device *dev)
++{
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++{
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++}
++
++static const char *blockStateName[] = {
++"Unknown",
++"Needs scanning",
++"Scanning",
++"Empty",
++"Allocating",
++"Full",
++"Dirty",
++"Checkpoint",
++"Collecting",
++"Dead"
++};
++
++static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
++{
++ int actuallyUsed;
++ int inUse;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Report illegal runtime states */
++ if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
++
++ switch (bi->blockState) {
++ case YAFFS_BLOCK_STATE_UNKNOWN:
++ case YAFFS_BLOCK_STATE_SCANNING:
++ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
++ n, blockStateName[bi->blockState]));
++ }
++
++ /* Check pages in use and soft deletions are legal */
++
++ actuallyUsed = bi->pagesInUse - bi->softDeletions;
++
++ if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
++ bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
++ actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
++ n, bi->pagesInUse, bi->softDeletions));
++
++
++ /* Check chunk bitmap legal */
++ inUse = yaffs_CountChunkBits(dev, n);
++ if (inUse != bi->pagesInUse)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
++ n, bi->pagesInUse, inUse));
++
++ /* Check that the sequence number is valid.
++ * Ten million is legal, but is very unlikely
++ */
++ if (dev->isYaffs2 &&
++ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
++ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
++ n, bi->sequenceNumber));
++}
++
++static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
++ int n)
++{
++ yaffs_VerifyBlock(dev, bi, n);
++
++ /* After collection the block should be in the erased state */
++ /* This will need to change if we do partial gc */
++
++ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
++ bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
++ n, bi->blockState));
++ }
++}
++
++static void yaffs_VerifyBlocks(yaffs_Device *dev)
++{
++ int i;
++ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
++ int nIllegalBlockStates = 0;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
++
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
++ yaffs_VerifyBlock(dev, bi, i);
++
++ if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
++ nBlocksPerState[bi->blockState]++;
++ else
++ nIllegalBlockStates++;
++ }
++
++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++
++ T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
++ if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
++
++ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("%s %d blocks"TENDSTR),
++ blockStateName[i], nBlocksPerState[i]));
++
++ if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
++ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++
++ if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
++ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++
++ if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
++ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
++
++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++
++}
++
++/*
++ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
++ * case those tests will not be performed.
++ */
++static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ if (!(tags && obj && oh)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
++ (__u32)tags, (__u32)obj, (__u32)oh));
++ return;
++ }
++
++ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
++ oh->type > YAFFS_OBJECT_TYPE_MAX)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
++ tags->objectId, oh->type));
++
++ if (tags->objectId != obj->objectId)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
++ tags->objectId, obj->objectId));
++
++
++ /*
++ * Check that the object's parent ids match if parentCheck requested.
++ *
++ * Tests do not apply to the root object.
++ */
++
++ if (parentCheck && tags->objectId > 1 && !obj->parent)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
++ tags->objectId, oh->parentObjectId));
++
++ if (parentCheck && obj->parent &&
++ oh->parentObjectId != obj->parent->objectId &&
++ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
++ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
++ tags->objectId, oh->parentObjectId, obj->parent->objectId));
++
++ if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is NULL"TENDSTR),
++ obj->objectId));
++
++ if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is 0xFF"TENDSTR),
++ obj->objectId));
++}
++
++
++
++static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ yaffs_Device *dev = obj->myDev;
++ int ok = 1;
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++ if (tn->internal[i]) {
++ ok = yaffs_VerifyTnodeWorker(obj,
++ tn->internal[i],
++ level - 1,
++ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++ }
++ }
++ } else if (level == 0) {
++ yaffs_ExtendedTags tags;
++ __u32 objectId = obj->objectId;
++
++ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
++
++ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++
++ if (theChunk > 0) {
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
++ if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
++ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, chunkOffset, theChunk,
++ tags.objectId, tags.chunkId));
++ }
++ }
++ chunkOffset++;
++ }
++ }
++ }
++
++ return ok;
++
++}
++
++
++static void yaffs_VerifyFile(yaffs_Object *obj)
++{
++ int requiredTallness;
++ int actualTallness;
++ __u32 lastChunk;
++ __u32 x;
++ __u32 i;
++ yaffs_Device *dev;
++ yaffs_ExtendedTags tags;
++ yaffs_Tnode *tn;
++ __u32 objectId;
++
++ if (!obj)
++ return;
++
++ if (yaffs_SkipVerification(obj->myDev))
++ return;
++
++ dev = obj->myDev;
++ objectId = obj->objectId;
++
++ /* Check file size is consistent with tnode depth */
++ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
++ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x > 0) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++ actualTallness = obj->variant.fileVariant.topLevel;
++
++ if (requiredTallness > actualTallness)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
++ obj->objectId, actualTallness, requiredTallness));
++
++
++ /* Check that the chunks in the tnode tree are all correct.
++ * We do this by scanning through the tnode tree and
++ * checking the tags for every chunk match.
++ */
++
++ if (yaffs_SkipNANDVerification(dev))
++ return;
++
++ for (i = 1; i <= lastChunk; i++) {
++ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
++
++ if (tn) {
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk > 0) {
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
++ if (tags.objectId != objectId || tags.chunkId != i) {
++ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, i, theChunk,
++ tags.objectId, tags.chunkId));
++ }
++ }
++ }
++ }
++}
++
++
++static void yaffs_VerifyHardLink(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ /* Verify sane equivalent object */
++}
++
++static void yaffs_VerifySymlink(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ /* Verify symlink string */
++}
++
++static void yaffs_VerifySpecial(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++}
++
++static void yaffs_VerifyObject(yaffs_Object *obj)
++{
++ yaffs_Device *dev;
++
++ __u32 chunkMin;
++ __u32 chunkMax;
++
++ __u32 chunkIdOk;
++ __u32 chunkInRange;
++ __u32 chunkShouldNotBeDeleted;
++ __u32 chunkValid;
++
++ if (!obj)
++ return;
++
++ if (obj->beingCreated)
++ return;
++
++ dev = obj->myDev;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Check sane object header chunk */
++
++ chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
++ chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
++
++ chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
++ chunkIdOk = chunkInRange || obj->hdrChunk == 0;
++ chunkValid = chunkInRange &&
++ yaffs_CheckChunkBit(dev,
++ obj->hdrChunk / dev->nChunksPerBlock,
++ obj->hdrChunk % dev->nChunksPerBlock);
++ chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++
++ if (!obj->fake &&
++ (!chunkIdOk || chunkShouldNotBeDeleted)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
++ obj->objectId, obj->hdrChunk,
++ chunkIdOk ? "" : ",out of range",
++ chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
++ }
++
++ if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
++ yaffs_ExtendedTags tags;
++ yaffs_ObjectHeader *oh;
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ oh = (yaffs_ObjectHeader *)buffer;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
++ &tags);
++
++ yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
++
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++ }
++
++ /* Verify it has a parent */
++ if (obj && !obj->fake &&
++ (!obj->parent || obj->parent->myDev != dev)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
++ obj->objectId, obj->parent));
++ }
++
++ /* Verify parent is a directory */
++ if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
++ obj->objectId, obj->parent->variantType));
++ }
++
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ yaffs_VerifyFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ yaffs_VerifySymlink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ yaffs_VerifyDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ yaffs_VerifyHardLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ yaffs_VerifySpecial(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has illegaltype %d"TENDSTR),
++ obj->objectId, obj->variantType));
++ break;
++ }
++}
++
++static void yaffs_VerifyObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ int i;
++ struct ylist_head *lh;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Iterate through the objects in each hash entry */
++
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ ylist_for_each(lh, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, hashLink);
++ yaffs_VerifyObject(obj);
++ }
++ }
++ }
++}
++
++
++/*
++ * Simple hash function. Needs to have a reasonable spread
++ */
++
++static Y_INLINE int yaffs_HashFunction(int n)
++{
++ n = abs(n);
++ return n % YAFFS_NOBJECT_BUCKETS;
++}
++
++/*
++ * Access functions to useful fake objects.
++ * Note that root might have a presence in NAND if permissions are set.
++ */
++
++yaffs_Object *yaffs_Root(yaffs_Device *dev)
++{
++ return dev->rootDir;
++}
++
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
++{
++ return dev->lostNFoundDir;
++}
++
++
++/*
++ * Erased NAND checking functions
++ */
++
++int yaffs_CheckFF(__u8 *buffer, int nBytes)
++{
++ /* Horrible, slow implementation */
++ while (nBytes--) {
++ if (*buffer != 0xFF)
++ return 0;
++ buffer++;
++ }
++ return 1;
++}
++
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND)
++{
++ int retval = YAFFS_OK;
++ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ExtendedTags tags;
++ int result;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
++
++ if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
++ retval = YAFFS_FAIL;
++
++ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
++ retval = YAFFS_FAIL;
++ }
++
++ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++
++ return retval;
++
++}
++
++static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags,
++ int useReserve)
++{
++ int attempts = 0;
++ int writeOk = 0;
++ int chunk;
++
++ yaffs_InvalidateCheckpoint(dev);
++
++ do {
++ yaffs_BlockInfo *bi = 0;
++ int erasedOk = 0;
++
++ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
++ if (chunk < 0) {
++ /* no space */
++ break;
++ }
++
++ /* First check this chunk is erased, if it needs
++ * checking. The checking policy (unless forced
++ * always on) is as follows:
++ *
++ * Check the first page we try to write in a block.
++ * If the check passes then we don't need to check any
++ * more. If the check fails, we check again...
++ * If the block has been erased, we don't need to check.
++ *
++ * However, if the block has been prioritised for gc,
++ * then we think there might be something odd about
++ * this block and stop using it.
++ *
++ * Rationale: We should only ever see chunks that have
++ * not been erased if there was a partially written
++ * chunk due to power loss. This checking policy should
++ * catch that case with very few checks and thus save a
++ * lot of checks that are most likely not needed.
++ */
++ if (bi->gcPrioritise) {
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++ /* try another chunk */
++ continue;
++ }
++
++ /* let's give it a try */
++ attempts++;
++
++#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ bi->skipErasedCheck = 0;
++#endif
++ if (!bi->skipErasedCheck) {
++ erasedOk = yaffs_CheckChunkErased(dev, chunk);
++ if (erasedOk != YAFFS_OK) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs chunk %d was not erased"
++ TENDSTR), chunk));
++
++ /* try another chunk */
++ continue;
++ }
++ bi->skipErasedCheck = 1;
++ }
++
++ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
++ data, tags);
++ if (writeOk != YAFFS_OK) {
++ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
++ /* try another chunk */
++ continue;
++ }
++
++ /* Copy the data into the robustification buffer */
++ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
++
++ } while (writeOk != YAFFS_OK &&
++ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
++
++ if (!writeOk)
++ chunk = -1;
++
++ if (attempts > 1) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
++ attempts));
++
++ dev->nRetriedWrites += (attempts - 1);
++ }
++
++ return chunk;
++}
++
++/*
++ * Block retiring for handling a broken block.
++ */
++
++static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
++{
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++
++ yaffs_InvalidateCheckpoint(dev);
++
++ if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
++ if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR(
++ "yaffs: Failed to mark bad and erase block %d"
++ TENDSTR), blockInNAND));
++ } else {
++ yaffs_ExtendedTags tags;
++ int chunkId = blockInNAND * dev->nChunksPerBlock;
++
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ memset(buffer, 0xff, dev->nDataBytesPerChunk);
++ yaffs_InitialiseTags(&tags);
++ tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
++ if (dev->writeChunkWithTagsToNAND(dev, chunkId -
++ dev->chunkOffset, buffer, &tags) != YAFFS_OK)
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
++ TCONT("write bad block marker to block %d")
++ TENDSTR), blockInNAND));
++
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++ }
++ }
++
++ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++ bi->gcPrioritise = 0;
++ bi->needsRetiring = 0;
++
++ dev->nRetiredBlocks++;
++}
++
++/*
++ * Functions for robustisizing TODO
++ *
++ */
++
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags)
++{
++}
++
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_ExtendedTags *tags)
++{
++}
++
++void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
++{
++ if (!bi->gcPrioritise) {
++ bi->gcPrioritise = 1;
++ dev->hasPendingPrioritisedGCs = 1;
++ bi->chunkErrorStrikes++;
++
++ if (bi->chunkErrorStrikes > 3) {
++ bi->needsRetiring = 1; /* Too many stikes, so retire this */
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
++
++ }
++ }
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
++ int erasedOk)
++{
++ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++
++ yaffs_HandleChunkError(dev, bi);
++
++ if (erasedOk) {
++ /* Was an actual write failure, so mark the block for retirement */
++ bi->needsRetiring = 1;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
++ }
++
++ /* Delete the chunk */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++}
++
++
++/*---------------- Name handling functions ------------*/
++
++static __u16 yaffs_CalcNameSum(const YCHAR *name)
++{
++ __u16 sum = 0;
++ __u16 i = 1;
++
++ const YUCHAR *bname = (const YUCHAR *) name;
++ if (bname) {
++ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
++
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++ sum += yaffs_toupper(*bname) * i;
++#else
++ sum += (*bname) * i;
++#endif
++ i++;
++ bname++;
++ }
++ }
++ return sum;
++}
++
++static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
++{
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
++ if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
++ yaffs_strcpy(obj->shortName, name);
++ else
++ obj->shortName[0] = _Y('\0');
++#endif
++ obj->sum = yaffs_CalcNameSum(name);
++}
++
++/*-------------------- TNODES -------------------
++
++ * List of spare tnodes
++ * The list is hooked together using the first pointer
++ * in the tnode.
++ */
++
++/* yaffs_CreateTnodes creates a bunch more tnodes and
++ * adds them to the tnode free list.
++ * Don't use this function directly
++ */
++
++static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
++{
++ int i;
++ int tnodeSize;
++ yaffs_Tnode *newTnodes;
++ __u8 *mem;
++ yaffs_Tnode *curr;
++ yaffs_Tnode *next;
++ yaffs_TnodeList *tnl;
++
++ if (nTnodes < 1)
++ return YAFFS_OK;
++
++ /* Calculate the tnode size in bytes for variable width tnode support.
++ * Must be a multiple of 32-bits */
++ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tnodeSize < sizeof(yaffs_Tnode))
++ tnodeSize = sizeof(yaffs_Tnode);
++
++ /* make these things */
++
++ newTnodes = YMALLOC(nTnodes * tnodeSize);
++ mem = (__u8 *)newTnodes;
++
++ if (!newTnodes) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Hook them into the free list */
++#if 0
++ for (i = 0; i < nTnodes - 1; i++) {
++ newTnodes[i].internal[0] = &newTnodes[i + 1];
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
++#endif
++ }
++
++ newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
++#endif
++ dev->freeTnodes = newTnodes;
++#else
++ /* New hookup for wide tnodes */
++ for (i = 0; i < nTnodes - 1; i++) {
++ curr = (yaffs_Tnode *) &mem[i * tnodeSize];
++ next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
++ curr->internal[0] = next;
++ }
++
++ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
++ curr->internal[0] = dev->freeTnodes;
++ dev->freeTnodes = (yaffs_Tnode *)mem;
++
++#endif
++
++
++ dev->nFreeTnodes += nTnodes;
++ dev->nTnodesCreated += nTnodes;
++
++ /* Now add this bunch of tnodes to a list for freeing up.
++ * NB If we can't add this to the management list it isn't fatal
++ * but it just means we can't free this bunch of tnodes later.
++ */
++
++ tnl = YMALLOC(sizeof(yaffs_TnodeList));
++ if (!tnl) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs: Could not add tnodes to management list" TENDSTR)));
++ return YAFFS_FAIL;
++ } else {
++ tnl->tnodes = newTnodes;
++ tnl->next = dev->allocatedTnodeList;
++ dev->allocatedTnodeList = tnl;
++ }
++
++ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
++
++static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
++{
++ yaffs_Tnode *tn = NULL;
++
++ /* If there are none left make more */
++ if (!dev->freeTnodes)
++ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
++
++ if (dev->freeTnodes) {
++ tn = dev->freeTnodes;
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
++ /* Hoosterman, this thing looks like it isn't in the list */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
++ }
++#endif
++ dev->freeTnodes = dev->freeTnodes->internal[0];
++ dev->nFreeTnodes--;
++ }
++
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++
++ return tn;
++}
++
++static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
++{
++ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
++ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tnodeSize < sizeof(yaffs_Tnode))
++ tnodeSize = sizeof(yaffs_Tnode);
++
++ if (tn)
++ memset(tn, 0, tnodeSize);
++
++ return tn;
++}
++
++/* FreeTnode frees up a tnode and puts it back on the free list */
++static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ if (tn) {
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
++ /* Hoosterman, this thing looks like it is already in the list */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
++ }
++ tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
++#endif
++ tn->internal[0] = dev->freeTnodes;
++ dev->freeTnodes = tn;
++ dev->nFreeTnodes++;
++ }
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
++
++static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
++{
++ /* Free the list of allocated tnodes */
++ yaffs_TnodeList *tmp;
++
++ while (dev->allocatedTnodeList) {
++ tmp = dev->allocatedTnodeList->next;
++
++ YFREE(dev->allocatedTnodeList->tnodes);
++ YFREE(dev->allocatedTnodeList);
++ dev->allocatedTnodeList = tmp;
++
++ }
++
++ dev->freeTnodes = NULL;
++ dev->nFreeTnodes = 0;
++}
++
++static void yaffs_InitialiseTnodes(yaffs_Device *dev)
++{
++ dev->allocatedTnodeList = NULL;
++ dev->freeTnodes = NULL;
++ dev->nFreeTnodes = 0;
++ dev->nTnodesCreated = 0;
++}
++
++
++void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
++ unsigned val)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 mask;
++
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
++ val >>= dev->chunkGroupBits;
++
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
++
++ mask = dev->tnodeMask << bitInWord;
++
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val << bitInWord));
++
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val >> bitInWord));
++ }
++}
++
++static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
++ unsigned pos)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 val;
++
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
++
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
++
++ val = map[wordInMap] >> bitInWord;
++
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ val |= (map[wordInMap] << bitInWord);
++ }
++
++ val &= dev->tnodeMask;
++ val <<= dev->chunkGroupBits;
++
++ return val;
++}
++
++/* ------------------- End of individual tnode manipulation -----------------*/
++
++/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
++ * The look up tree is represented by the top tnode and the number of topLevel
++ * in the tree. 0 means only the level 0 tnode is in the tree.
++ */
++
++/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
++static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId)
++{
++ yaffs_Tnode *tn = fStruct->top;
++ __u32 i;
++ int requiredTallness;
++ int level = fStruct->topLevel;
++
++ /* Check sane level and chunk Id */
++ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
++
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
++
++ /* First check we're tall enough (ie enough topLevel) */
++
++ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (i) {
++ i >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++ if (requiredTallness > fStruct->topLevel)
++ return NULL; /* Not tall enough, so we can't find it */
++
++ /* Traverse down to level 0 */
++ while (level > 0 && tn) {
++ tn = tn->internal[(chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (level - 1) *
++ YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK];
++ level--;
++ }
++
++ return tn;
++}
++
++/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
++ * This happens in two steps:
++ * 1. If the tree isn't tall enough, then make it taller.
++ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
++ *
++ * Used when modifying the tree.
++ *
++ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
++ * be plugged into the ttree.
++ */
++
++static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId,
++ yaffs_Tnode *passedTn)
++{
++ int requiredTallness;
++ int i;
++ int l;
++ yaffs_Tnode *tn;
++
++ __u32 x;
++
++
++ /* Check sane level and page Id */
++ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
++
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
++
++ /* First check we're tall enough (ie enough topLevel) */
++
++ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++
++ if (requiredTallness > fStruct->topLevel) {
++ /* Not tall enough, gotta make the tree taller */
++ for (i = fStruct->topLevel; i < requiredTallness; i++) {
++
++ tn = yaffs_GetTnode(dev);
++
++ if (tn) {
++ tn->internal[0] = fStruct->top;
++ fStruct->top = tn;
++ } else {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: no more tnodes" TENDSTR)));
++ }
++ }
++
++ fStruct->topLevel = requiredTallness;
++ }
++
++ /* Traverse down to level 0, adding anything we need */
++
++ l = fStruct->topLevel;
++ tn = fStruct->top;
++
++ if (l > 0) {
++ while (l > 0 && tn) {
++ x = (chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK;
++
++
++ if ((l > 1) && !tn->internal[x]) {
++ /* Add missing non-level-zero tnode */
++ tn->internal[x] = yaffs_GetTnode(dev);
++
++ } else if (l == 1) {
++ /* Looking from level 1 at level 0 */
++ if (passedTn) {
++ /* If we already have one, then release it.*/
++ if (tn->internal[x])
++ yaffs_FreeTnode(dev, tn->internal[x]);
++ tn->internal[x] = passedTn;
++
++ } else if (!tn->internal[x]) {
++ /* Don't have one, none passed in */
++ tn->internal[x] = yaffs_GetTnode(dev);
++ }
++ }
++
++ tn = tn->internal[x];
++ l--;
++ }
++ } else {
++ /* top is level 0 */
++ if (passedTn) {
++ memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
++ yaffs_FreeTnode(dev, passedTn);
++ }
++ }
++
++ return tn;
++}
++
++static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
++ yaffs_ExtendedTags *tags, int objectId,
++ int chunkInInode)
++{
++ int j;
++
++ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
++ if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
++ theChunk % dev->nChunksPerBlock)) {
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
++ tags);
++ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
++ /* found it; */
++ return theChunk;
++ }
++ }
++ theChunk++;
++ }
++ return -1;
++}
++
++
++/* DeleteWorker scans backwards through the tnode tree and deletes all the
++ * chunks and tnodes in the file
++ * Returns 1 if the tree was deleted.
++ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
++ */
++
++static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
++ int chunkOffset, int *limit)
++{
++ int i;
++ int chunkInInode;
++ int theChunk;
++ yaffs_ExtendedTags tags;
++ int foundChunk;
++ yaffs_Device *dev = in->myDev;
++
++ int allDone = 1;
++
++ if (tn) {
++ if (level > 0) {
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ if (limit && (*limit) < 0) {
++ allDone = 0;
++ } else {
++ allDone =
++ yaffs_DeleteWorker(in,
++ tn->
++ internal
++ [i],
++ level -
++ 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i,
++ limit);
++ }
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
++ int hitLimit = 0;
++
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
++ i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
++
++ chunkInInode = (chunkOffset <<
++ YAFFS_TNODES_LEVEL0_BITS) + i;
++
++ foundChunk =
++ yaffs_FindChunkInGroup(dev,
++ theChunk,
++ &tags,
++ in->objectId,
++ chunkInInode);
++
++ if (foundChunk > 0) {
++ yaffs_DeleteChunk(dev,
++ foundChunk, 1,
++ __LINE__);
++ in->nDataChunks--;
++ if (limit) {
++ *limit = *limit - 1;
++ if (*limit <= 0)
++ hitLimit = 1;
++ }
++
++ }
++
++ yaffs_PutLevel0Tnode(dev, tn, i, 0);
++ }
++
++ }
++ return (i < 0) ? 1 : 0;
++
++ }
++
++ }
++
++ return 1;
++
++}
++
++static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
++{
++ yaffs_BlockInfo *theBlock;
++
++ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
++
++ theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
++ if (theBlock) {
++ theBlock->softDeletions++;
++ dev->nFreeChunks++;
++ }
++}
++
++/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
++ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
++ * of the tnode.
++ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
++ */
++
++static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ int theChunk;
++ int allDone = 1;
++ yaffs_Device *dev = in->myDev;
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ allDone =
++ yaffs_SoftDeleteWorker(in,
++ tn->
++ internal[i],
++ level - 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i);
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ } else {
++ /* Hoosterman... how could this happen? */
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
++
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
++ /* Note this does not find the real chunk, only the chunk group.
++ * We make an assumption that a chunk group is not larger than
++ * a block.
++ */
++ yaffs_SoftDeleteChunk(dev, theChunk);
++ yaffs_PutLevel0Tnode(dev, tn, i, 0);
++ }
++
++ }
++ return 1;
++
++ }
++
++ }
++
++ return 1;
++
++}
++
++static void yaffs_SoftDeleteFile(yaffs_Object *obj)
++{
++ if (obj->deleted &&
++ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
++ if (obj->nDataChunks <= 0) {
++ /* Empty file with no duplicate object headers, just delete it immediately */
++ yaffs_FreeTnode(obj->myDev,
++ obj->variant.fileVariant.top);
++ obj->variant.fileVariant.top = NULL;
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
++ obj->objectId));
++ yaffs_DoGenericObjectDeletion(obj);
++ } else {
++ yaffs_SoftDeleteWorker(obj,
++ obj->variant.fileVariant.top,
++ obj->variant.fileVariant.
++ topLevel, 0);
++ obj->softDeleted = 1;
++ }
++ }
++}
++
++/* Pruning removes any part of the file structure tree that is beyond the
++ * bounds of the file (ie that does not point to chunks).
++ *
++ * A file should only get pruned when its size is reduced.
++ *
++ * Before pruning, the chunks must be pulled from the tree and the
++ * level 0 tnode entries must be zeroed out.
++ * Could also use this for file deletion, but that's probably better handled
++ * by a special case.
++ */
++
++static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
++ __u32 level, int del0)
++{
++ int i;
++ int hasData;
++
++ if (tn) {
++ hasData = 0;
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i] && level > 0) {
++ tn->internal[i] =
++ yaffs_PruneWorker(dev, tn->internal[i],
++ level - 1,
++ (i == 0) ? del0 : 1);
++ }
++
++ if (tn->internal[i])
++ hasData++;
++ }
++
++ if (hasData == 0 && del0) {
++ /* Free and return NULL */
++
++ yaffs_FreeTnode(dev, tn);
++ tn = NULL;
++ }
++
++ }
++
++ return tn;
++
++}
++
++static int yaffs_PruneFileStructure(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct)
++{
++ int i;
++ int hasData;
++ int done = 0;
++ yaffs_Tnode *tn;
++
++ if (fStruct->topLevel > 0) {
++ fStruct->top =
++ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
++
++ /* Now we have a tree with all the non-zero branches NULL but the height
++ * is the same as it was.
++ * Let's see if we can trim internal tnodes to shorten the tree.
++ * We can do this if only the 0th element in the tnode is in use
++ * (ie all the non-zero are NULL)
++ */
++
++ while (fStruct->topLevel && !done) {
++ tn = fStruct->top;
++
++ hasData = 0;
++ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i])
++ hasData++;
++ }
++
++ if (!hasData) {
++ fStruct->top = tn->internal[0];
++ fStruct->topLevel--;
++ yaffs_FreeTnode(dev, tn);
++ } else {
++ done = 1;
++ }
++ }
++ }
++
++ return YAFFS_OK;
++}
++
++/*-------------------- End of File Structure functions.-------------------*/
++
++/* yaffs_CreateFreeObjects creates a bunch more objects and
++ * adds them to the object free list.
++ */
++static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
++{
++ int i;
++ yaffs_Object *newObjects;
++ yaffs_ObjectList *list;
++
++ if (nObjects < 1)
++ return YAFFS_OK;
++
++ /* make these things */
++ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
++ list = YMALLOC(sizeof(yaffs_ObjectList));
++
++ if (!newObjects || !list) {
++ if (newObjects)
++ YFREE(newObjects);
++ if (list)
++ YFREE(list);
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Hook them into the free list */
++ for (i = 0; i < nObjects - 1; i++) {
++ newObjects[i].siblings.next =
++ (struct ylist_head *)(&newObjects[i + 1]);
++ }
++
++ newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
++ dev->freeObjects = newObjects;
++ dev->nFreeObjects += nObjects;
++ dev->nObjectsCreated += nObjects;
++
++ /* Now add this bunch of Objects to a list for freeing up. */
++
++ list->objects = newObjects;
++ list->next = dev->allocatedObjectList;
++ dev->allocatedObjectList = list;
++
++ return YAFFS_OK;
++}
++
++
++/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
++static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
++{
++ yaffs_Object *tn = NULL;
++
++#ifdef VALGRIND_TEST
++ tn = YMALLOC(sizeof(yaffs_Object));
++#else
++ /* If there are none left make more */
++ if (!dev->freeObjects)
++ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
++
++ if (dev->freeObjects) {
++ tn = dev->freeObjects;
++ dev->freeObjects =
++ (yaffs_Object *) (dev->freeObjects->siblings.next);
++ dev->nFreeObjects--;
++ }
++#endif
++ if (tn) {
++ /* Now sweeten it up... */
++
++ memset(tn, 0, sizeof(yaffs_Object));
++ tn->beingCreated = 1;
++
++ tn->myDev = dev;
++ tn->hdrChunk = 0;
++ tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
++ YINIT_LIST_HEAD(&(tn->hardLinks));
++ YINIT_LIST_HEAD(&(tn->hashLink));
++ YINIT_LIST_HEAD(&tn->siblings);
++
++
++ /* Now make the directory sane */
++ if (dev->rootDir) {
++ tn->parent = dev->rootDir;
++ ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
++ }
++
++ /* Add it to the lost and found directory.
++ * NB Can't put root or lostNFound in lostNFound so
++ * check if lostNFound exists first
++ */
++ if (dev->lostNFoundDir)
++ yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
++
++ tn->beingCreated = 0;
++ }
++
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++
++ return tn;
++}
++
++static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
++ __u32 mode)
++{
++
++ yaffs_Object *obj =
++ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
++ if (obj) {
++ obj->fake = 1; /* it is fake so it might have no NAND presence... */
++ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
++ obj->unlinkAllowed = 0; /* ... or unlink it */
++ obj->deleted = 0;
++ obj->unlinked = 0;
++ obj->yst_mode = mode;
++ obj->myDev = dev;
++ obj->hdrChunk = 0; /* Not a valid chunk. */
++ }
++
++ return obj;
++
++}
++
++static void yaffs_UnhashObject(yaffs_Object *tn)
++{
++ int bucket;
++ yaffs_Device *dev = tn->myDev;
++
++ /* If it is still linked into the bucket list, free from the list */
++ if (!ylist_empty(&tn->hashLink)) {
++ ylist_del_init(&tn->hashLink);
++ bucket = yaffs_HashFunction(tn->objectId);
++ dev->objectBucket[bucket].count--;
++ }
++}
++
++/* FreeObject frees up a Object and puts it back on the free list */
++static void yaffs_FreeObject(yaffs_Object *tn)
++{
++ yaffs_Device *dev = tn->myDev;
++
++#ifdef __KERNEL__
++ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
++#endif
++
++ if (tn->parent)
++ YBUG();
++ if (!ylist_empty(&tn->siblings))
++ YBUG();
++
++
++#ifdef __KERNEL__
++ if (tn->myInode) {
++ /* We're still hooked up to a cached inode.
++ * Don't delete now, but mark for later deletion
++ */
++ tn->deferedFree = 1;
++ return;
++ }
++#endif
++
++ yaffs_UnhashObject(tn);
++
++#ifdef VALGRIND_TEST
++ YFREE(tn);
++#else
++ /* Link into the free list. */
++ tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
++ dev->freeObjects = tn;
++ dev->nFreeObjects++;
++#endif
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
++
++#ifdef __KERNEL__
++
++void yaffs_HandleDeferedFree(yaffs_Object *obj)
++{
++ if (obj->deferedFree)
++ yaffs_FreeObject(obj);
++}
++
++#endif
++
++static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
++{
++ /* Free the list of allocated Objects */
++
++ yaffs_ObjectList *tmp;
++
++ while (dev->allocatedObjectList) {
++ tmp = dev->allocatedObjectList->next;
++ YFREE(dev->allocatedObjectList->objects);
++ YFREE(dev->allocatedObjectList);
++
++ dev->allocatedObjectList = tmp;
++ }
++
++ dev->freeObjects = NULL;
++ dev->nFreeObjects = 0;
++}
++
++static void yaffs_InitialiseObjects(yaffs_Device *dev)
++{
++ int i;
++
++ dev->allocatedObjectList = NULL;
++ dev->freeObjects = NULL;
++ dev->nFreeObjects = 0;
++
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
++ dev->objectBucket[i].count = 0;
++ }
++}
++
++static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
++{
++ static int x;
++ int i;
++ int l = 999;
++ int lowest = 999999;
++
++ /* First let's see if we can find one that's empty. */
++
++ for (i = 0; i < 10 && lowest > 0; i++) {
++ x++;
++ x %= YAFFS_NOBJECT_BUCKETS;
++ if (dev->objectBucket[x].count < lowest) {
++ lowest = dev->objectBucket[x].count;
++ l = x;
++ }
++
++ }
++
++ /* If we didn't find an empty list, then try
++ * looking a bit further for a short one
++ */
++
++ for (i = 0; i < 10 && lowest > 3; i++) {
++ x++;
++ x %= YAFFS_NOBJECT_BUCKETS;
++ if (dev->objectBucket[x].count < lowest) {
++ lowest = dev->objectBucket[x].count;
++ l = x;
++ }
++
++ }
++
++ return l;
++}
++
++static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
++{
++ int bucket = yaffs_FindNiceObjectBucket(dev);
++
++ /* Now find an object value that has not already been taken
++ * by scanning the list.
++ */
++
++ int found = 0;
++ struct ylist_head *i;
++
++ __u32 n = (__u32) bucket;
++
++ /* yaffs_CheckObjectHashSanity(); */
++
++ while (!found) {
++ found = 1;
++ n += YAFFS_NOBJECT_BUCKETS;
++ if (1 || dev->objectBucket[bucket].count > 0) {
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* If there is already one in the list */
++ if (i && ylist_entry(i, yaffs_Object,
++ hashLink)->objectId == n) {
++ found = 0;
++ }
++ }
++ }
++ }
++
++ return n;
++}
++
++static void yaffs_HashObject(yaffs_Object *in)
++{
++ int bucket = yaffs_HashFunction(in->objectId);
++ yaffs_Device *dev = in->myDev;
++
++ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
++ dev->objectBucket[bucket].count++;
++}
++
++yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
++{
++ int bucket = yaffs_HashFunction(number);
++ struct ylist_head *i;
++ yaffs_Object *in;
++
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* Look if it is in the list */
++ if (i) {
++ in = ylist_entry(i, yaffs_Object, hashLink);
++ if (in->objectId == number) {
++#ifdef __KERNEL__
++ /* Don't tell the VFS about this one if it is defered free */
++ if (in->deferedFree)
++ return NULL;
++#endif
++
++ return in;
++ }
++ }
++ }
++
++ return NULL;
++}
++
++yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject;
++ yaffs_Tnode *tn = NULL;
++
++ if (number < 0)
++ number = yaffs_CreateNewObjectNumber(dev);
++
++ theObject = yaffs_AllocateEmptyObject(dev);
++ if (!theObject)
++ return NULL;
++
++ if (type == YAFFS_OBJECT_TYPE_FILE) {
++ tn = yaffs_GetTnode(dev);
++ if (!tn) {
++ yaffs_FreeObject(theObject);
++ return NULL;
++ }
++ }
++
++ if (theObject) {
++ theObject->fake = 0;
++ theObject->renameAllowed = 1;
++ theObject->unlinkAllowed = 1;
++ theObject->objectId = number;
++ yaffs_HashObject(theObject);
++ theObject->variantType = type;
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(theObject->win_atime);
++ theObject->win_ctime[0] = theObject->win_mtime[0] =
++ theObject->win_atime[0];
++ theObject->win_ctime[1] = theObject->win_mtime[1] =
++ theObject->win_atime[1];
++
++#else
++
++ theObject->yst_atime = theObject->yst_mtime =
++ theObject->yst_ctime = Y_CURRENT_TIME;
++#endif
++ switch (type) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ theObject->variant.fileVariant.fileSize = 0;
++ theObject->variant.fileVariant.scannedFileSize = 0;
++ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
++ theObject->variant.fileVariant.topLevel = 0;
++ theObject->variant.fileVariant.top = tn;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
++ children);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* No action required */
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* todo this should not happen */
++ break;
++ }
++ }
++
++ return theObject;
++}
++
++static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
++ int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject = NULL;
++
++ if (number > 0)
++ theObject = yaffs_FindObjectByNumber(dev, number);
++
++ if (!theObject)
++ theObject = yaffs_CreateNewObject(dev, number, type);
++
++ return theObject;
++
++}
++
++
++static YCHAR *yaffs_CloneString(const YCHAR *str)
++{
++ YCHAR *newStr = NULL;
++
++ if (str && *str) {
++ newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
++ if (newStr)
++ yaffs_strcpy(newStr, str);
++ }
++
++ return newStr;
++
++}
++
++/*
++ * Mknod (create) a new object.
++ * equivalentObject only has meaning for a hard link;
++ * aliasString only has meaning for a sumlink.
++ * rdev only has meaning for devices (a subset of special objects)
++ */
++
++static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
++ yaffs_Object *parent,
++ const YCHAR *name,
++ __u32 mode,
++ __u32 uid,
++ __u32 gid,
++ yaffs_Object *equivalentObject,
++ const YCHAR *aliasString, __u32 rdev)
++{
++ yaffs_Object *in;
++ YCHAR *str = NULL;
++
++ yaffs_Device *dev = parent->myDev;
++
++ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
++ if (yaffs_FindObjectByName(parent, name))
++ return NULL;
++
++ in = yaffs_CreateNewObject(dev, -1, type);
++
++ if (!in)
++ return YAFFS_FAIL;
++
++ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
++ str = yaffs_CloneString(aliasString);
++ if (!str) {
++ yaffs_FreeObject(in);
++ return NULL;
++ }
++ }
++
++
++
++ if (in) {
++ in->hdrChunk = 0;
++ in->valid = 1;
++ in->variantType = type;
++
++ in->yst_mode = mode;
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(in->win_atime);
++ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
++ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
++
++#else
++ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
++
++ in->yst_rdev = rdev;
++ in->yst_uid = uid;
++ in->yst_gid = gid;
++#endif
++ in->nDataChunks = 0;
++
++ yaffs_SetObjectName(in, name);
++ in->dirty = 1;
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ in->myDev = parent->myDev;
++
++ switch (type) {
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ in->variant.symLinkVariant.alias = str;
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.equivalentObject =
++ equivalentObject;
++ in->variant.hardLinkVariant.equivalentObjectId =
++ equivalentObject->objectId;
++ ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* do nothing */
++ break;
++ }
++
++ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
++ /* Could not create the object header, fail the creation */
++ yaffs_DeleteObject(in);
++ in = NULL;
++ }
++
++ }
++
++ return in;
++}
++
++yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
++ uid, gid, NULL, NULL, 0);
++}
++
++yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
++ mode, uid, gid, NULL, NULL, 0);
++}
++
++yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
++ uid, gid, NULL, NULL, rdev);
++}
++
++yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid,
++ const YCHAR *alias)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
++ uid, gid, NULL, alias, 0);
++}
++
++/* yaffs_Link returns the object id of the equivalent object.*/
++yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
++ yaffs_Object *equivalentObject)
++{
++ /* Get the real object in case we were fed a hard link as an equivalent object */
++ equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
++
++ if (yaffs_MknodObject
++ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
++ equivalentObject, NULL, 0)) {
++ return equivalentObject;
++ } else {
++ return NULL;
++ }
++
++}
++
++static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
++ const YCHAR *newName, int force, int shadows)
++{
++ int unlinkOp;
++ int deleteOp;
++
++ yaffs_Object *existingTarget;
++
++ if (newDir == NULL)
++ newDir = obj->parent; /* use the old directory */
++
++ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
++ TENDSTR)));
++ YBUG();
++ }
++
++ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
++ if (obj->myDev->isYaffs2)
++ unlinkOp = (newDir == obj->myDev->unlinkedDir);
++ else
++ unlinkOp = (newDir == obj->myDev->unlinkedDir
++ && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
++
++ deleteOp = (newDir == obj->myDev->deletedDir);
++
++ existingTarget = yaffs_FindObjectByName(newDir, newName);
++
++ /* If the object is a file going into the unlinked directory,
++ * then it is OK to just stuff it in since duplicate names are allowed.
++ * else only proceed if the new name does not exist and if we're putting
++ * it into a directory.
++ */
++ if ((unlinkOp ||
++ deleteOp ||
++ force ||
++ (shadows > 0) ||
++ !existingTarget) &&
++ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
++ yaffs_SetObjectName(obj, newName);
++ obj->dirty = 1;
++
++ yaffs_AddObjectToDirectory(newDir, obj);
++
++ if (unlinkOp)
++ obj->unlinked = 1;
++
++ /* If it is a deletion then we mark it as a shrink for gc purposes. */
++ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
++ return YAFFS_OK;
++ }
++
++ return YAFFS_FAIL;
++}
++
++int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
++ yaffs_Object *newDir, const YCHAR *newName)
++{
++ yaffs_Object *obj = NULL;
++ yaffs_Object *existingTarget = NULL;
++ int force = 0;
++
++
++ if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ YBUG();
++ if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ YBUG();
++
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++ /* Special case for case insemsitive systems (eg. WinCE).
++ * While look-up is case insensitive, the name isn't.
++ * Therefore we might want to change x.txt to X.txt
++ */
++ if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
++ force = 1;
++#endif
++
++ else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
++ /* ENAMETOOLONG */
++ return YAFFS_FAIL;
++
++ obj = yaffs_FindObjectByName(oldDir, oldName);
++
++ if (obj && obj->renameAllowed) {
++
++ /* Now do the handling for an existing target, if there is one */
++
++ existingTarget = yaffs_FindObjectByName(newDir, newName);
++ if (existingTarget &&
++ existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
++ !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
++ /* There is a target that is a non-empty directory, so we fail */
++ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
++ } else if (existingTarget && existingTarget != obj) {
++ /* Nuke the target first, using shadowing,
++ * but only if it isn't the same object
++ */
++ yaffs_ChangeObjectName(obj, newDir, newName, force,
++ existingTarget->objectId);
++ yaffs_UnlinkObject(existingTarget);
++ }
++
++ return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
++ }
++ return YAFFS_FAIL;
++}
++
++/*------------------------- Block Management and Page Allocation ----------------*/
++
++static int yaffs_InitialiseBlocks(yaffs_Device *dev)
++{
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++
++ dev->blockInfo = NULL;
++ dev->chunkBits = NULL;
++
++ dev->allocationBlock = -1; /* force it to get a new one */
++
++ /* If the first allocation strategy fails, thry the alternate one */
++ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
++ if (!dev->blockInfo) {
++ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
++ dev->blockInfoAlt = 1;
++ } else
++ dev->blockInfoAlt = 0;
++
++ if (dev->blockInfo) {
++ /* Set up dynamic blockinfo stuff. */
++ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
++ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
++ if (!dev->chunkBits) {
++ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
++ dev->chunkBitsAlt = 1;
++ } else
++ dev->chunkBitsAlt = 0;
++ }
++
++ if (dev->blockInfo && dev->chunkBits) {
++ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
++ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
++ return YAFFS_OK;
++ }
++
++ return YAFFS_FAIL;
++}
++
++static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
++{
++ if (dev->blockInfoAlt && dev->blockInfo)
++ YFREE_ALT(dev->blockInfo);
++ else if (dev->blockInfo)
++ YFREE(dev->blockInfo);
++
++ dev->blockInfoAlt = 0;
++
++ dev->blockInfo = NULL;
++
++ if (dev->chunkBitsAlt && dev->chunkBits)
++ YFREE_ALT(dev->chunkBits);
++ else if (dev->chunkBits)
++ YFREE(dev->chunkBits);
++ dev->chunkBitsAlt = 0;
++ dev->chunkBits = NULL;
++}
++
++static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
++ yaffs_BlockInfo *bi)
++{
++ int i;
++ __u32 seq;
++ yaffs_BlockInfo *b;
++
++ if (!dev->isYaffs2)
++ return 1; /* disqualification only applies to yaffs2. */
++
++ if (!bi->hasShrinkHeader)
++ return 1; /* can gc */
++
++ /* Find the oldest dirty sequence number if we don't know it and save it
++ * so we don't have to keep recomputing it.
++ */
++ if (!dev->oldestDirtySequence) {
++ seq = dev->sequenceNumber;
++
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
++ i++) {
++ b = yaffs_GetBlockInfo(dev, i);
++ if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
++ (b->pagesInUse - b->softDeletions) <
++ dev->nChunksPerBlock && b->sequenceNumber < seq) {
++ seq = b->sequenceNumber;
++ }
++ }
++ dev->oldestDirtySequence = seq;
++ }
++
++ /* Can't do gc of this block if there are any blocks older than this one that have
++ * discarded pages.
++ */
++ return (bi->sequenceNumber <= dev->oldestDirtySequence);
++}
++
++/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
++ * for garbage collection.
++ */
++
++static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
++ int aggressive)
++{
++ int b = dev->currentDirtyChecker;
++
++ int i;
++ int iterations;
++ int dirtiest = -1;
++ int pagesInUse = 0;
++ int prioritised = 0;
++ yaffs_BlockInfo *bi;
++ int pendingPrioritisedExist = 0;
++
++ /* First let's see if we need to grab a prioritised block */
++ if (dev->hasPendingPrioritisedGCs) {
++ for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
++
++ bi = yaffs_GetBlockInfo(dev, i);
++ /* yaffs_VerifyBlock(dev,bi,i); */
++
++ if (bi->gcPrioritise) {
++ pendingPrioritisedExist = 1;
++ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
++ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
++ pagesInUse = (bi->pagesInUse - bi->softDeletions);
++ dirtiest = i;
++ prioritised = 1;
++ aggressive = 1; /* Fool the non-aggressive skip logiv below */
++ }
++ }
++ }
++
++ if (!pendingPrioritisedExist) /* None found, so we can clear this */
++ dev->hasPendingPrioritisedGCs = 0;
++ }
++
++ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
++ * search harder.
++ * else (we're doing a leasurely gc), then we only bother to do this if the
++ * block has only a few pages in use.
++ */
++
++ dev->nonAggressiveSkip--;
++
++ if (!aggressive && (dev->nonAggressiveSkip > 0))
++ return -1;
++
++ if (!prioritised)
++ pagesInUse =
++ (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
++
++ if (aggressive)
++ iterations =
++ dev->internalEndBlock - dev->internalStartBlock + 1;
++ else {
++ iterations =
++ dev->internalEndBlock - dev->internalStartBlock + 1;
++ iterations = iterations / 16;
++ if (iterations > 200)
++ iterations = 200;
++ }
++
++ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
++ b++;
++ if (b < dev->internalStartBlock || b > dev->internalEndBlock)
++ b = dev->internalStartBlock;
++
++ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> Block %d is not valid" TENDSTR), b));
++ YBUG();
++ }
++
++ bi = yaffs_GetBlockInfo(dev, b);
++
++ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
++ (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
++ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
++ dirtiest = b;
++ pagesInUse = (bi->pagesInUse - bi->softDeletions);
++ }
++ }
++
++ dev->currentDirtyChecker = b;
++
++ if (dirtiest > 0) {
++ T(YAFFS_TRACE_GC,
++ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
++ dev->nChunksPerBlock - pagesInUse, prioritised));
++ }
++
++ dev->oldestDirtySequence = 0;
++
++ if (dirtiest > 0)
++ dev->nonAggressiveSkip = 4;
++
++ return dirtiest;
++}
++
++static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
++{
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
++
++ int erasedOk = 0;
++
++ /* If the block is still healthy erase it and mark as clean.
++ * If the block has had a data failure, then retire it.
++ */
++
++ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
++ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
++ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
++
++ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
++
++ if (!bi->needsRetiring) {
++ yaffs_InvalidateCheckpoint(dev);
++ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
++ if (!erasedOk) {
++ dev->nErasureFailures++;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
++ }
++ }
++
++ if (erasedOk &&
++ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
++ int i;
++ for (i = 0; i < dev->nChunksPerBlock; i++) {
++ if (!yaffs_CheckChunkErased
++ (dev, blockNo * dev->nChunksPerBlock + i)) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ (">>Block %d erasure supposedly OK, but chunk %d not erased"
++ TENDSTR), blockNo, i));
++ }
++ }
++ }
++
++ if (erasedOk) {
++ /* Clean it up... */
++ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++ bi->hasShrinkHeader = 0;
++ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
++ bi->gcPrioritise = 0;
++ yaffs_ClearChunkBits(dev, blockNo);
++
++ T(YAFFS_TRACE_ERASE,
++ (TSTR("Erased block %d" TENDSTR), blockNo));
++ } else {
++ dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
++
++ yaffs_RetireBlock(dev, blockNo);
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Block %d retired" TENDSTR), blockNo));
++ }
++}
++
++static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
++{
++ int i;
++
++ yaffs_BlockInfo *bi;
++
++ if (dev->nErasedBlocks < 1) {
++ /* Hoosterman we've got a problem.
++ * Can't get space to gc
++ */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
++
++ return -1;
++ }
++
++ /* Find an empty block. */
++
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ dev->allocationBlockFinder++;
++ if (dev->allocationBlockFinder < dev->internalStartBlock
++ || dev->allocationBlockFinder > dev->internalEndBlock) {
++ dev->allocationBlockFinder = dev->internalStartBlock;
++ }
++
++ bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
++
++ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
++ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->sequenceNumber++;
++ bi->sequenceNumber = dev->sequenceNumber;
++ dev->nErasedBlocks--;
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
++ dev->allocationBlockFinder, dev->sequenceNumber,
++ dev->nErasedBlocks));
++ return dev->allocationBlockFinder;
++ }
++ }
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("yaffs tragedy: no more erased blocks, but there should have been %d"
++ TENDSTR), dev->nErasedBlocks));
++
++ return -1;
++}
++
++
++
++static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
++{
++ if (!dev->nCheckpointBlocksRequired &&
++ dev->isYaffs2) {
++ /* Not a valid value so recalculate */
++ int nBytes = 0;
++ int nBlocks;
++ int devBlocks = (dev->endBlock - dev->startBlock + 1);
++ int tnodeSize;
++
++ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tnodeSize < sizeof(yaffs_Tnode))
++ tnodeSize = sizeof(yaffs_Tnode);
++
++ nBytes += sizeof(yaffs_CheckpointValidity);
++ nBytes += sizeof(yaffs_CheckpointDevice);
++ nBytes += devBlocks * sizeof(yaffs_BlockInfo);
++ nBytes += devBlocks * dev->chunkBitmapStride;
++ nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
++ nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
++ nBytes += sizeof(yaffs_CheckpointValidity);
++ nBytes += sizeof(__u32); /* checksum*/
++
++ /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
++
++ nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
++
++ dev->nCheckpointBlocksRequired = nBlocks;
++ }
++
++ return dev->nCheckpointBlocksRequired;
++}
++
++/*
++ * Check if there's space to allocate...
++ * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
++ */
++static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
++{
++ int reservedChunks;
++ int reservedBlocks = dev->nReservedBlocks;
++ int checkpointBlocks;
++
++ if (dev->isYaffs2) {
++ checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
++ dev->blocksInCheckpoint;
++ if (checkpointBlocks < 0)
++ checkpointBlocks = 0;
++ } else {
++ checkpointBlocks = 0;
++ }
++
++ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
++
++ return (dev->nFreeChunks > reservedChunks);
++}
++
++static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
++ yaffs_BlockInfo **blockUsedPtr)
++{
++ int retVal;
++ yaffs_BlockInfo *bi;
++
++ if (dev->allocationBlock < 0) {
++ /* Get next block to allocate off */
++ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
++ dev->allocationPage = 0;
++ }
++
++ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
++ /* Not enough space to allocate unless we're allowed to use the reserve. */
++ return -1;
++ }
++
++ if (dev->nErasedBlocks < dev->nReservedBlocks
++ && dev->allocationPage == 0) {
++ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
++ }
++
++ /* Next page please.... */
++ if (dev->allocationBlock >= 0) {
++ bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
++
++ retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
++ dev->allocationPage;
++ bi->pagesInUse++;
++ yaffs_SetChunkBit(dev, dev->allocationBlock,
++ dev->allocationPage);
++
++ dev->allocationPage++;
++
++ dev->nFreeChunks--;
++
++ /* If the block is full set the state to full */
++ if (dev->allocationPage >= dev->nChunksPerBlock) {
++ bi->blockState = YAFFS_BLOCK_STATE_FULL;
++ dev->allocationBlock = -1;
++ }
++
++ if (blockUsedPtr)
++ *blockUsedPtr = bi;
++
++ return retVal;
++ }
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
++
++ return -1;
++}
++
++static int yaffs_GetErasedChunks(yaffs_Device *dev)
++{
++ int n;
++
++ n = dev->nErasedBlocks * dev->nChunksPerBlock;
++
++ if (dev->allocationBlock > 0)
++ n += (dev->nChunksPerBlock - dev->allocationPage);
++
++ return n;
++
++}
++
++static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
++ int wholeBlock)
++{
++ int oldChunk;
++ int newChunk;
++ int markNAND;
++ int retVal = YAFFS_OK;
++ int cleanups = 0;
++ int i;
++ int isCheckpointBlock;
++ int matchingChunk;
++ int maxCopies;
++
++ int chunksBefore = yaffs_GetErasedChunks(dev);
++ int chunksAfter;
++
++ yaffs_ExtendedTags tags;
++
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
++
++ yaffs_Object *object;
++
++ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
++
++ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
++
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
++ block,
++ bi->pagesInUse,
++ bi->hasShrinkHeader,
++ wholeBlock));
++
++ /*yaffs_VerifyFreeChunks(dev); */
++
++ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
++
++ /* Take off the number of soft deleted entries because
++ * they're going to get really deleted during GC.
++ */
++ dev->nFreeChunks -= bi->softDeletions;
++
++ dev->isDoingGC = 1;
++
++ if (isCheckpointBlock ||
++ !yaffs_StillSomeChunkBits(dev, block)) {
++ T(YAFFS_TRACE_TRACING,
++ (TSTR
++ ("Collecting block %d that has no chunks in use" TENDSTR),
++ block));
++ yaffs_BlockBecameDirty(dev, block);
++ } else {
++
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ yaffs_VerifyBlock(dev, bi, block);
++
++ maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
++ oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
++
++ for (/* init already done */;
++ retVal == YAFFS_OK &&
++ dev->gcChunk < dev->nChunksPerBlock &&
++ (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
++ maxCopies > 0;
++ dev->gcChunk++, oldChunk++) {
++ if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
++
++ /* This page is in use and might need to be copied off */
++
++ maxCopies--;
++
++ markNAND = 1;
++
++ yaffs_InitialiseTags(&tags);
++
++ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
++ buffer, &tags);
++
++ object =
++ yaffs_FindObjectByNumber(dev,
++ tags.objectId);
++
++ T(YAFFS_TRACE_GC_DETAIL,
++ (TSTR
++ ("Collecting chunk in block %d, %d %d %d " TENDSTR),
++ dev->gcChunk, tags.objectId, tags.chunkId,
++ tags.byteCount));
++
++ if (object && !yaffs_SkipVerification(dev)) {
++ if (tags.chunkId == 0)
++ matchingChunk = object->hdrChunk;
++ else if (object->softDeleted)
++ matchingChunk = oldChunk; /* Defeat the test */
++ else
++ matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
++
++ if (oldChunk != matchingChunk)
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
++ oldChunk, matchingChunk, tags.objectId, tags.chunkId));
++
++ }
++
++ if (!object) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("page %d in gc has no object: %d %d %d "
++ TENDSTR), oldChunk,
++ tags.objectId, tags.chunkId, tags.byteCount));
++ }
++
++ if (object &&
++ object->deleted &&
++ object->softDeleted &&
++ tags.chunkId != 0) {
++ /* Data chunk in a soft deleted file, throw it away
++ * It's a soft deleted data chunk,
++ * No need to copy this, just forget about it and
++ * fix up the object.
++ */
++
++ object->nDataChunks--;
++
++ if (object->nDataChunks <= 0) {
++ /* remeber to clean up the object */
++ dev->gcCleanupList[cleanups] =
++ tags.objectId;
++ cleanups++;
++ }
++ markNAND = 0;
++ } else if (0) {
++ /* Todo object && object->deleted && object->nDataChunks == 0 */
++ /* Deleted object header with no data chunks.
++ * Can be discarded and the file deleted.
++ */
++ object->hdrChunk = 0;
++ yaffs_FreeTnode(object->myDev,
++ object->variant.
++ fileVariant.top);
++ object->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(object);
++
++ } else if (object) {
++ /* It's either a data chunk in a live file or
++ * an ObjectHeader, so we're interested in it.
++ * NB Need to keep the ObjectHeaders of deleted files
++ * until the whole file has been deleted off
++ */
++ tags.serialNumber++;
++
++ dev->nGCCopies++;
++
++ if (tags.chunkId == 0) {
++ /* It is an object Id,
++ * We need to nuke the shrinkheader flags first
++ * We no longer want the shrinkHeader flag since its work is done
++ * and if it is left in place it will mess up scanning.
++ */
++
++ yaffs_ObjectHeader *oh;
++ oh = (yaffs_ObjectHeader *)buffer;
++ oh->isShrink = 0;
++ tags.extraIsShrinkHeader = 0;
++
++ yaffs_VerifyObjectHeader(object, oh, &tags, 1);
++ }
++
++ newChunk =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
++
++ if (newChunk < 0) {
++ retVal = YAFFS_FAIL;
++ } else {
++
++ /* Ok, now fix up the Tnodes etc. */
++
++ if (tags.chunkId == 0) {
++ /* It's a header */
++ object->hdrChunk = newChunk;
++ object->serial = tags.serialNumber;
++ } else {
++ /* It's a data chunk */
++ yaffs_PutChunkIntoFile
++ (object,
++ tags.chunkId,
++ newChunk, 0);
++ }
++ }
++ }
++
++ if (retVal == YAFFS_OK)
++ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
++
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++
++
++ /* Do any required cleanups */
++ for (i = 0; i < cleanups; i++) {
++ /* Time to delete the file too */
++ object =
++ yaffs_FindObjectByNumber(dev,
++ dev->gcCleanupList[i]);
++ if (object) {
++ yaffs_FreeTnode(dev,
++ object->variant.fileVariant.
++ top);
++ object->variant.fileVariant.top = NULL;
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: About to finally delete object %d"
++ TENDSTR), object->objectId));
++ yaffs_DoGenericObjectDeletion(object);
++ object->myDev->nDeletedFiles--;
++ }
++
++ }
++
++ }
++
++ yaffs_VerifyCollectedBlock(dev, bi, block);
++
++ chunksAfter = yaffs_GetErasedChunks(dev);
++ if (chunksBefore >= chunksAfter) {
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("gc did not increase free chunks before %d after %d"
++ TENDSTR), chunksBefore, chunksAfter));
++ }
++
++ /* If the gc completed then clear the current gcBlock so that we find another. */
++ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
++ dev->gcBlock = -1;
++ dev->gcChunk = 0;
++ }
++
++ dev->isDoingGC = 0;
++
++ return retVal;
++}
++
++/* New garbage collector
++ * If we're very low on erased blocks then we do aggressive garbage collection
++ * otherwise we do "leasurely" garbage collection.
++ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
++ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
++ *
++ * The idea is to help clear out space in a more spread-out manner.
++ * Dunno if it really does anything useful.
++ */
++static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
++{
++ int block;
++ int aggressive;
++ int gcOk = YAFFS_OK;
++ int maxTries = 0;
++
++ int checkpointBlockAdjust;
++
++ if (dev->isDoingGC) {
++ /* Bail out so we don't get recursive gc */
++ return YAFFS_OK;
++ }
++
++ /* This loop should pass the first time.
++ * We'll only see looping here if the erase of the collected block fails.
++ */
++
++ do {
++ maxTries++;
++
++ checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
++ if (checkpointBlockAdjust < 0)
++ checkpointBlockAdjust = 0;
++
++ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
++ /* We need a block soon...*/
++ aggressive = 1;
++ } else {
++ /* We're in no hurry */
++ aggressive = 0;
++ }
++
++ if (dev->gcBlock <= 0) {
++ dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
++ dev->gcChunk = 0;
++ }
++
++ block = dev->gcBlock;
++
++ if (block > 0) {
++ dev->garbageCollections++;
++ if (!aggressive)
++ dev->passiveGarbageCollections++;
++
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
++ dev->nErasedBlocks, aggressive));
++
++ gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
++ }
++
++ if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
++ TENDSTR), dev->nErasedBlocks, maxTries, block));
++ }
++ } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
++ (block > 0) &&
++ (maxTries < 2));
++
++ return aggressive ? gcOk : YAFFS_OK;
++}
++
++/*------------------------- TAGS --------------------------------*/
++
++static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
++ int chunkInObject)
++{
++ return (tags->chunkId == chunkInObject &&
++ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
++
++}
++
++
++/*-------------------- Data file manipulation -----------------*/
++
++static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
++ yaffs_ExtendedTags *tags)
++{
++ /*Get the Tnode, then get the level 0 offset chunk offset */
++ yaffs_Tnode *tn;
++ int theChunk = -1;
++ yaffs_ExtendedTags localTags;
++ int retVal = -1;
++
++ yaffs_Device *dev = in->myDev;
++
++ if (!tags) {
++ /* Passed a NULL, so use our own tags space */
++ tags = &localTags;
++ }
++
++ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++
++ if (tn) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++
++ retVal =
++ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
++ chunkInInode);
++ }
++ return retVal;
++}
++
++static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
++ yaffs_ExtendedTags *tags)
++{
++ /* Get the Tnode, then get the level 0 offset chunk offset */
++ yaffs_Tnode *tn;
++ int theChunk = -1;
++ yaffs_ExtendedTags localTags;
++
++ yaffs_Device *dev = in->myDev;
++ int retVal = -1;
++
++ if (!tags) {
++ /* Passed a NULL, so use our own tags space */
++ tags = &localTags;
++ }
++
++ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++
++ if (tn) {
++
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++
++ retVal =
++ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
++ chunkInInode);
++
++ /* Delete the entry in the filestructure (if found) */
++ if (retVal != -1)
++ yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
++ }
++
++ return retVal;
++}
++
++#ifdef YAFFS_PARANOID
++
++static int yaffs_CheckFileSanity(yaffs_Object *in)
++{
++ int chunk;
++ int nChunks;
++ int fSize;
++ int failed = 0;
++ int objId;
++ yaffs_Tnode *tn;
++ yaffs_Tags localTags;
++ yaffs_Tags *tags = &localTags;
++ int theChunk;
++ int chunkDeleted;
++
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
++ return YAFFS_FAIL;
++
++ objId = in->objectId;
++ fSize = in->variant.fileVariant.fileSize;
++ nChunks =
++ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
++
++ for (chunk = 1; chunk <= nChunks; chunk++) {
++ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
++ chunk);
++
++ if (tn) {
++
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
++
++ if (yaffs_CheckChunkBits
++ (dev, theChunk / dev->nChunksPerBlock,
++ theChunk % dev->nChunksPerBlock)) {
++
++ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
++ tags,
++ &chunkDeleted);
++ if (yaffs_TagsMatch
++ (tags, in->objectId, chunk, chunkDeleted)) {
++ /* found it; */
++
++ }
++ } else {
++
++ failed = 1;
++ }
++
++ } else {
++ /* T(("No level 0 found for %d\n", chunk)); */
++ }
++ }
++
++ return failed ? YAFFS_FAIL : YAFFS_OK;
++}
++
++#endif
++
++static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
++ int chunkInNAND, int inScan)
++{
++ /* NB inScan is zero unless scanning.
++ * For forward scanning, inScan is > 0;
++ * for backward scanning inScan is < 0
++ */
++
++ yaffs_Tnode *tn;
++ yaffs_Device *dev = in->myDev;
++ int existingChunk;
++ yaffs_ExtendedTags existingTags;
++ yaffs_ExtendedTags newTags;
++ unsigned existingSerial, newSerial;
++
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
++ /* Just ignore an attempt at putting a chunk into a non-file during scanning
++ * If it is not during Scanning then something went wrong!
++ */
++ if (!inScan) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy:attempt to put data chunk into a non-file"
++ TENDSTR)));
++ YBUG();
++ }
++
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++ return YAFFS_OK;
++ }
++
++ tn = yaffs_AddOrFindLevel0Tnode(dev,
++ &in->variant.fileVariant,
++ chunkInInode,
++ NULL);
++ if (!tn)
++ return YAFFS_FAIL;
++
++ existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++
++ if (inScan != 0) {
++ /* If we're scanning then we need to test for duplicates
++ * NB This does not need to be efficient since it should only ever
++ * happen when the power fails during a write, then only one
++ * chunk should ever be affected.
++ *
++ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
++ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
++ */
++
++ if (existingChunk > 0) {
++ /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
++ * thus we have to do a FindChunkInFile to get the real chunk id.
++ *
++ * We have a duplicate now we need to decide which one to use:
++ *
++ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
++ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
++ * YAFFS1: Get both sets of tags and compare serial numbers.
++ */
++
++ if (inScan > 0) {
++ /* Only do this for forward scanning */
++ yaffs_ReadChunkWithTagsFromNAND(dev,
++ chunkInNAND,
++ NULL, &newTags);
++
++ /* Do a proper find */
++ existingChunk =
++ yaffs_FindChunkInFile(in, chunkInInode,
++ &existingTags);
++ }
++
++ if (existingChunk <= 0) {
++ /*Hoosterman - how did this happen? */
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: existing chunk < 0 in scan"
++ TENDSTR)));
++
++ }
++
++ /* NB The deleted flags should be false, otherwise the chunks will
++ * not be loaded during a scan
++ */
++
++ if (inScan > 0) {
++ newSerial = newTags.serialNumber;
++ existingSerial = existingTags.serialNumber;
++ }
++
++ if ((inScan > 0) &&
++ (in->myDev->isYaffs2 ||
++ existingChunk <= 0 ||
++ ((existingSerial + 1) & 3) == newSerial)) {
++ /* Forward scanning.
++ * Use new
++ * Delete the old one and drop through to update the tnode
++ */
++ yaffs_DeleteChunk(dev, existingChunk, 1,
++ __LINE__);
++ } else {
++ /* Backward scanning or we want to use the existing one
++ * Use existing.
++ * Delete the new one and return early so that the tnode isn't changed
++ */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1,
++ __LINE__);
++ return YAFFS_OK;
++ }
++ }
++
++ }
++
++ if (existingChunk == 0)
++ in->nDataChunks++;
++
++ yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
++
++ return YAFFS_OK;
++}
++
++static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
++ __u8 *buffer)
++{
++ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
++
++ if (chunkInNAND >= 0)
++ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
++ buffer, NULL);
++ else {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not found zero instead" TENDSTR),
++ chunkInNAND));
++ /* get sane (zero) data if you read a hole */
++ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
++ return 0;
++ }
++
++}
++
++void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
++{
++ int block;
++ int page;
++ yaffs_ExtendedTags tags;
++ yaffs_BlockInfo *bi;
++
++ if (chunkId <= 0)
++ return;
++
++ dev->nDeletions++;
++ block = chunkId / dev->nChunksPerBlock;
++ page = chunkId % dev->nChunksPerBlock;
++
++
++ if (!yaffs_CheckChunkBit(dev, block, page))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Deleting invalid chunk %d"TENDSTR),
++ chunkId));
++
++ bi = yaffs_GetBlockInfo(dev, block);
++
++ T(YAFFS_TRACE_DELETION,
++ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
++
++ if (markNAND &&
++ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
++
++ yaffs_InitialiseTags(&tags);
++
++ tags.chunkDeleted = 1;
++
++ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
++ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
++ } else {
++ dev->nUnmarkedDeletions++;
++ }
++
++ /* Pull out of the management area.
++ * If the whole block became dirty, this will kick off an erasure.
++ */
++ if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
++ bi->blockState == YAFFS_BLOCK_STATE_FULL ||
++ bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
++ dev->nFreeChunks++;
++
++ yaffs_ClearChunkBit(dev, block, page);
++
++ bi->pagesInUse--;
++
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
++ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ yaffs_BlockBecameDirty(dev, block);
++ }
++
++ }
++
++}
++
++static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
++ const __u8 *buffer, int nBytes,
++ int useReserve)
++{
++ /* Find old chunk Need to do this to get serial number
++ * Write new one and patch into tree.
++ * Invalidate old tags.
++ */
++
++ int prevChunkId;
++ yaffs_ExtendedTags prevTags;
++
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
++
++ yaffs_Device *dev = in->myDev;
++
++ yaffs_CheckGarbageCollection(dev);
++
++ /* Get the previous chunk at this location in the file if it exists */
++ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
++
++ /* Set up new tags */
++ yaffs_InitialiseTags(&newTags);
++
++ newTags.chunkId = chunkInInode;
++ newTags.objectId = in->objectId;
++ newTags.serialNumber =
++ (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
++ newTags.byteCount = nBytes;
++
++ if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
++ YBUG();
++ }
++
++ newChunkId =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
++ useReserve);
++
++ if (newChunkId >= 0) {
++ yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
++
++ if (prevChunkId >= 0)
++ yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
++
++ yaffs_CheckFileSanity(in);
++ }
++ return newChunkId;
++
++}
++
++/* UpdateObjectHeader updates the header on NAND for an object.
++ * If name is not NULL, then that new name is used.
++ */
++int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
++ int isShrink, int shadows)
++{
++
++ yaffs_BlockInfo *bi;
++
++ yaffs_Device *dev = in->myDev;
++
++ int prevChunkId;
++ int retVal = 0;
++ int result = 0;
++
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
++ yaffs_ExtendedTags oldTags;
++
++ __u8 *buffer = NULL;
++ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
++
++ yaffs_ObjectHeader *oh = NULL;
++
++ yaffs_strcpy(oldName, _Y("silly old name"));
++
++
++ if (!in->fake ||
++ in == dev->rootDir || /* The rootDir should also be saved */
++ force) {
++
++ yaffs_CheckGarbageCollection(dev);
++ yaffs_CheckObjectDetailsLoaded(in);
++
++ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
++ oh = (yaffs_ObjectHeader *) buffer;
++
++ prevChunkId = in->hdrChunk;
++
++ if (prevChunkId > 0) {
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
++ buffer, &oldTags);
++
++ yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
++
++ memcpy(oldName, oh->name, sizeof(oh->name));
++ }
++
++ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
++
++ oh->type = in->variantType;
++ oh->yst_mode = in->yst_mode;
++ oh->shadowsObject = oh->inbandShadowsObject = shadows;
++
++#ifdef CONFIG_YAFFS_WINCE
++ oh->win_atime[0] = in->win_atime[0];
++ oh->win_ctime[0] = in->win_ctime[0];
++ oh->win_mtime[0] = in->win_mtime[0];
++ oh->win_atime[1] = in->win_atime[1];
++ oh->win_ctime[1] = in->win_ctime[1];
++ oh->win_mtime[1] = in->win_mtime[1];
++#else
++ oh->yst_uid = in->yst_uid;
++ oh->yst_gid = in->yst_gid;
++ oh->yst_atime = in->yst_atime;
++ oh->yst_mtime = in->yst_mtime;
++ oh->yst_ctime = in->yst_ctime;
++ oh->yst_rdev = in->yst_rdev;
++#endif
++ if (in->parent)
++ oh->parentObjectId = in->parent->objectId;
++ else
++ oh->parentObjectId = 0;
++
++ if (name && *name) {
++ memset(oh->name, 0, sizeof(oh->name));
++ yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
++ } else if (prevChunkId >= 0)
++ memcpy(oh->name, oldName, sizeof(oh->name));
++ else
++ memset(oh->name, 0, sizeof(oh->name));
++
++ oh->isShrink = isShrink;
++
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Should not happen */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ oh->fileSize =
++ (oh->parentObjectId == YAFFS_OBJECTID_DELETED
++ || oh->parentObjectId ==
++ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
++ fileVariant.fileSize;
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ oh->equivalentObjectId =
++ in->variant.hardLinkVariant.equivalentObjectId;
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ yaffs_strncpy(oh->alias,
++ in->variant.symLinkVariant.alias,
++ YAFFS_MAX_ALIAS_LENGTH);
++ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++ break;
++ }
++
++ /* Tags */
++ yaffs_InitialiseTags(&newTags);
++ in->serial++;
++ newTags.chunkId = 0;
++ newTags.objectId = in->objectId;
++ newTags.serialNumber = in->serial;
++
++ /* Add extra info for file header */
++
++ newTags.extraHeaderInfoAvailable = 1;
++ newTags.extraParentObjectId = oh->parentObjectId;
++ newTags.extraFileLength = oh->fileSize;
++ newTags.extraIsShrinkHeader = oh->isShrink;
++ newTags.extraEquivalentObjectId = oh->equivalentObjectId;
++ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
++ newTags.extraObjectType = in->variantType;
++
++ yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
++
++ /* Create new chunk in NAND */
++ newChunkId =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
++ (prevChunkId >= 0) ? 1 : 0);
++
++ if (newChunkId >= 0) {
++
++ in->hdrChunk = newChunkId;
++
++ if (prevChunkId >= 0) {
++ yaffs_DeleteChunk(dev, prevChunkId, 1,
++ __LINE__);
++ }
++
++ if (!yaffs_ObjectHasCachedWriteData(in))
++ in->dirty = 0;
++
++ /* If this was a shrink, then mark the block that the chunk lives on */
++ if (isShrink) {
++ bi = yaffs_GetBlockInfo(in->myDev,
++ newChunkId / in->myDev->nChunksPerBlock);
++ bi->hasShrinkHeader = 1;
++ }
++
++ }
++
++ retVal = newChunkId;
++
++ }
++
++ if (buffer)
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++
++ return retVal;
++}
++
++/*------------------------ Short Operations Cache ----------------------------------------
++ * In many situations where there is no high level buffering (eg WinCE) a lot of
++ * reads might be short sequential reads, and a lot of writes may be short
++ * sequential writes. eg. scanning/writing a jpeg file.
++ * In these cases, a short read/write cache can provide a huge perfomance benefit
++ * with dumb-as-a-rock code.
++ * In Linux, the page cache provides read buffering aand the short op cache provides write
++ * buffering.
++ *
++ * There are a limited number (~10) of cache chunks per device so that we don't
++ * need a very intelligent search.
++ */
++
++static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
++{
++ yaffs_Device *dev = obj->myDev;
++ int i;
++ yaffs_ChunkCache *cache;
++ int nCaches = obj->myDev->nShortOpCaches;
++
++ for (i = 0; i < nCaches; i++) {
++ cache = &dev->srCache[i];
++ if (cache->object == obj &&
++ cache->dirty)
++ return 1;
++ }
++
++ return 0;
++}
++
++
++static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
++{
++ yaffs_Device *dev = obj->myDev;
++ int lowest = -99; /* Stop compiler whining. */
++ int i;
++ yaffs_ChunkCache *cache;
++ int chunkWritten = 0;
++ int nCaches = obj->myDev->nShortOpCaches;
++
++ if (nCaches > 0) {
++ do {
++ cache = NULL;
++
++ /* Find the dirty cache for this object with the lowest chunk id. */
++ for (i = 0; i < nCaches; i++) {
++ if (dev->srCache[i].object == obj &&
++ dev->srCache[i].dirty) {
++ if (!cache
++ || dev->srCache[i].chunkId <
++ lowest) {
++ cache = &dev->srCache[i];
++ lowest = cache->chunkId;
++ }
++ }
++ }
++
++ if (cache && !cache->locked) {
++ /* Write it out and free it up */
++
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(cache->object,
++ cache->chunkId,
++ cache->data,
++ cache->nBytes,
++ 1);
++ cache->dirty = 0;
++ cache->object = NULL;
++ }
++
++ } while (cache && chunkWritten > 0);
++
++ if (cache) {
++ /* Hoosterman, disk full while writing cache out. */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
++
++ }
++ }
++
++}
++
++/*yaffs_FlushEntireDeviceCache(dev)
++ *
++ *
++ */
++
++void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ int nCaches = dev->nShortOpCaches;
++ int i;
++
++ /* Find a dirty object in the cache and flush it...
++ * until there are no further dirty objects.
++ */
++ do {
++ obj = NULL;
++ for (i = 0; i < nCaches && !obj; i++) {
++ if (dev->srCache[i].object &&
++ dev->srCache[i].dirty)
++ obj = dev->srCache[i].object;
++
++ }
++ if (obj)
++ yaffs_FlushFilesChunkCache(obj);
++
++ } while (obj);
++
++}
++
++
++/* Grab us a cache chunk for use.
++ * First look for an empty one.
++ * Then look for the least recently used non-dirty one.
++ * Then look for the least recently used dirty one...., flush and look again.
++ */
++static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
++{
++ int i;
++
++ if (dev->nShortOpCaches > 0) {
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (!dev->srCache[i].object)
++ return &dev->srCache[i];
++ }
++ }
++
++ return NULL;
++}
++
++static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
++{
++ yaffs_ChunkCache *cache;
++ yaffs_Object *theObj;
++ int usage;
++ int i;
++ int pushout;
++
++ if (dev->nShortOpCaches > 0) {
++ /* Try find a non-dirty one... */
++
++ cache = yaffs_GrabChunkCacheWorker(dev);
++
++ if (!cache) {
++ /* They were all dirty, find the last recently used object and flush
++ * its cache, then find again.
++ * NB what's here is not very accurate, we actually flush the object
++ * the last recently used page.
++ */
++
++ /* With locking we can't assume we can use entry zero */
++
++ theObj = NULL;
++ usage = -1;
++ cache = NULL;
++ pushout = -1;
++
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].object &&
++ !dev->srCache[i].locked &&
++ (dev->srCache[i].lastUse < usage || !cache)) {
++ usage = dev->srCache[i].lastUse;
++ theObj = dev->srCache[i].object;
++ cache = &dev->srCache[i];
++ pushout = i;
++ }
++ }
++
++ if (!cache || cache->dirty) {
++ /* Flush and try again */
++ yaffs_FlushFilesChunkCache(theObj);
++ cache = yaffs_GrabChunkCacheWorker(dev);
++ }
++
++ }
++ return cache;
++ } else
++ return NULL;
++
++}
++
++/* Find a cached chunk */
++static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
++ int chunkId)
++{
++ yaffs_Device *dev = obj->myDev;
++ int i;
++ if (dev->nShortOpCaches > 0) {
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].object == obj &&
++ dev->srCache[i].chunkId == chunkId) {
++ dev->cacheHits++;
++
++ return &dev->srCache[i];
++ }
++ }
++ }
++ return NULL;
++}
++
++/* Mark the chunk for the least recently used algorithym */
++static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
++ int isAWrite)
++{
++
++ if (dev->nShortOpCaches > 0) {
++ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
++ /* Reset the cache usages */
++ int i;
++ for (i = 1; i < dev->nShortOpCaches; i++)
++ dev->srCache[i].lastUse = 0;
++
++ dev->srLastUse = 0;
++ }
++
++ dev->srLastUse++;
++
++ cache->lastUse = dev->srLastUse;
++
++ if (isAWrite)
++ cache->dirty = 1;
++ }
++}
++
++/* Invalidate a single cache page.
++ * Do this when a whole page gets written,
++ * ie the short cache for this page is no longer valid.
++ */
++static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
++{
++ if (object->myDev->nShortOpCaches > 0) {
++ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
++
++ if (cache)
++ cache->object = NULL;
++ }
++}
++
++/* Invalidate all the cache pages associated with this object
++ * Do this whenever ther file is deleted or resized.
++ */
++static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
++{
++ int i;
++ yaffs_Device *dev = in->myDev;
++
++ if (dev->nShortOpCaches > 0) {
++ /* Invalidate it. */
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].object == in)
++ dev->srCache[i].object = NULL;
++ }
++ }
++}
++
++/*--------------------- Checkpointing --------------------*/
++
++
++static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
++{
++ yaffs_CheckpointValidity cp;
++
++ memset(&cp, 0, sizeof(cp));
++
++ cp.structType = sizeof(cp);
++ cp.magic = YAFFS_MAGIC;
++ cp.version = YAFFS_CHECKPOINT_VERSION;
++ cp.head = (head) ? 1 : 0;
++
++ return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
++ 1 : 0;
++}
++
++static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
++{
++ yaffs_CheckpointValidity cp;
++ int ok;
++
++ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ if (ok)
++ ok = (cp.structType == sizeof(cp)) &&
++ (cp.magic == YAFFS_MAGIC) &&
++ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
++ (cp.head == ((head) ? 1 : 0));
++ return ok ? 1 : 0;
++}
++
++static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
++ yaffs_Device *dev)
++{
++ cp->nErasedBlocks = dev->nErasedBlocks;
++ cp->allocationBlock = dev->allocationBlock;
++ cp->allocationPage = dev->allocationPage;
++ cp->nFreeChunks = dev->nFreeChunks;
++
++ cp->nDeletedFiles = dev->nDeletedFiles;
++ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
++ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
++ cp->sequenceNumber = dev->sequenceNumber;
++ cp->oldestDirtySequence = dev->oldestDirtySequence;
++
++}
++
++static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
++ yaffs_CheckpointDevice *cp)
++{
++ dev->nErasedBlocks = cp->nErasedBlocks;
++ dev->allocationBlock = cp->allocationBlock;
++ dev->allocationPage = cp->allocationPage;
++ dev->nFreeChunks = cp->nFreeChunks;
++
++ dev->nDeletedFiles = cp->nDeletedFiles;
++ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
++ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
++ dev->sequenceNumber = cp->sequenceNumber;
++ dev->oldestDirtySequence = cp->oldestDirtySequence;
++}
++
++
++static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
++{
++ yaffs_CheckpointDevice cp;
++ __u32 nBytes;
++ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++
++ int ok;
++
++ /* Write device runtime values*/
++ yaffs_DeviceToCheckpointDevice(&cp, dev);
++ cp.structType = sizeof(cp);
++
++ ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ /* Write block info */
++ if (ok) {
++ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++ ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
++ }
++
++ /* Write chunk bits */
++ if (ok) {
++ nBytes = nBlocks * dev->chunkBitmapStride;
++ ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
++ }
++ return ok ? 1 : 0;
++
++}
++
++static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
++{
++ yaffs_CheckpointDevice cp;
++ __u32 nBytes;
++ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++
++ int ok;
++
++ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++ if (!ok)
++ return 0;
++
++ if (cp.structType != sizeof(cp))
++ return 0;
++
++
++ yaffs_CheckpointDeviceToDevice(dev, &cp);
++
++ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++
++ ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
++
++ if (!ok)
++ return 0;
++ nBytes = nBlocks * dev->chunkBitmapStride;
++
++ ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
++
++ return ok ? 1 : 0;
++}
++
++static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
++ yaffs_Object *obj)
++{
++
++ cp->objectId = obj->objectId;
++ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
++ cp->hdrChunk = obj->hdrChunk;
++ cp->variantType = obj->variantType;
++ cp->deleted = obj->deleted;
++ cp->softDeleted = obj->softDeleted;
++ cp->unlinked = obj->unlinked;
++ cp->fake = obj->fake;
++ cp->renameAllowed = obj->renameAllowed;
++ cp->unlinkAllowed = obj->unlinkAllowed;
++ cp->serial = obj->serial;
++ cp->nDataChunks = obj->nDataChunks;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
++ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
++}
++
++static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
++{
++
++ yaffs_Object *parent;
++
++ if (obj->variantType != cp->variantType) {
++ T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
++ TCONT("chunk %d does not match existing object type %d")
++ TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
++ obj->variantType));
++ return 0;
++ }
++
++ obj->objectId = cp->objectId;
++
++ if (cp->parentId)
++ parent = yaffs_FindOrCreateObjectByNumber(
++ obj->myDev,
++ cp->parentId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ else
++ parent = NULL;
++
++ if (parent) {
++ if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
++ TCONT(" chunk %d Parent type, %d, not directory")
++ TENDSTR),
++ cp->objectId, cp->parentId, cp->variantType,
++ cp->hdrChunk, parent->variantType));
++ return 0;
++ }
++ yaffs_AddObjectToDirectory(parent, obj);
++ }
++
++ obj->hdrChunk = cp->hdrChunk;
++ obj->variantType = cp->variantType;
++ obj->deleted = cp->deleted;
++ obj->softDeleted = cp->softDeleted;
++ obj->unlinked = cp->unlinked;
++ obj->fake = cp->fake;
++ obj->renameAllowed = cp->renameAllowed;
++ obj->unlinkAllowed = cp->unlinkAllowed;
++ obj->serial = cp->serial;
++ obj->nDataChunks = cp->nDataChunks;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
++ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
++
++ if (obj->hdrChunk > 0)
++ obj->lazyLoaded = 1;
++ return 1;
++}
++
++
++
++static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ yaffs_Device *dev = in->myDev;
++ int ok = 1;
++ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tnodeSize < sizeof(yaffs_Tnode))
++ tnodeSize = sizeof(yaffs_Tnode);
++
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++ if (tn->internal[i]) {
++ ok = yaffs_CheckpointTnodeWorker(in,
++ tn->internal[i],
++ level - 1,
++ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++ }
++ }
++ } else if (level == 0) {
++ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
++ ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
++ if (ok)
++ ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
++ }
++ }
++
++ return ok;
++
++}
++
++static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
++{
++ __u32 endMarker = ~0;
++ int ok = 1;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
++ ok = yaffs_CheckpointTnodeWorker(obj,
++ obj->variant.fileVariant.top,
++ obj->variant.fileVariant.topLevel,
++ 0);
++ if (ok)
++ ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
++ sizeof(endMarker));
++ }
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
++{
++ __u32 baseChunk;
++ int ok = 1;
++ yaffs_Device *dev = obj->myDev;
++ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
++ yaffs_Tnode *tn;
++ int nread = 0;
++ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tnodeSize < sizeof(yaffs_Tnode))
++ tnodeSize = sizeof(yaffs_Tnode);
++
++ ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++ while (ok && (~baseChunk)) {
++ nread++;
++ /* Read level 0 tnode */
++
++
++ tn = yaffs_GetTnodeRaw(dev);
++ if (tn)
++ ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
++ else
++ ok = 0;
++
++ if (tn && ok)
++ ok = yaffs_AddOrFindLevel0Tnode(dev,
++ fileStructPtr,
++ baseChunk,
++ tn) ? 1 : 0;
++
++ if (ok)
++ ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (
++ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
++ nread, baseChunk, ok));
++
++ return ok ? 1 : 0;
++}
++
++
++static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ yaffs_CheckpointObject cp;
++ int i;
++ int ok = 1;
++ struct ylist_head *lh;
++
++
++ /* Iterate through the objects in each hash entry,
++ * dumping them to the checkpointing stream.
++ */
++
++ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
++ ylist_for_each(lh, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, hashLink);
++ if (!obj->deferedFree) {
++ yaffs_ObjectToCheckpointObject(&cp, obj);
++ cp.structType = sizeof(cp);
++
++ T(YAFFS_TRACE_CHECKPOINT, (
++ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
++ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
++
++ ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ ok = yaffs_WriteCheckpointTnodes(obj);
++ }
++ }
++ }
++ }
++
++ /* Dump end of list */
++ memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
++ cp.structType = sizeof(cp);
++
++ if (ok)
++ ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ yaffs_CheckpointObject cp;
++ int ok = 1;
++ int done = 0;
++ yaffs_Object *hardList = NULL;
++
++ while (ok && !done) {
++ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++ if (cp.structType != sizeof(cp)) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
++ cp.structType, sizeof(cp), ok));
++ ok = 0;
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
++ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
++
++ if (ok && cp.objectId == ~0)
++ done = 1;
++ else if (ok) {
++ obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
++ if (obj) {
++ ok = yaffs_CheckpointObjectToObject(obj, &cp);
++ if (!ok)
++ break;
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
++ ok = yaffs_ReadCheckpointTnodes(obj);
++ } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++ obj->hardLinks.next =
++ (struct ylist_head *) hardList;
++ hardList = obj;
++ }
++ } else
++ ok = 0;
++ }
++ }
++
++ if (ok)
++ yaffs_HardlinkFixup(dev, hardList);
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
++{
++ __u32 checkpointSum;
++ int ok;
++
++ yaffs_GetCheckpointSum(dev, &checkpointSum);
++
++ ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
++
++ if (!ok)
++ return 0;
++
++ return 1;
++}
++
++static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
++{
++ __u32 checkpointSum0;
++ __u32 checkpointSum1;
++ int ok;
++
++ yaffs_GetCheckpointSum(dev, &checkpointSum0);
++
++ ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
++
++ if (!ok)
++ return 0;
++
++ if (checkpointSum0 != checkpointSum1)
++ return 0;
++
++ return 1;
++}
++
++
++static int yaffs_WriteCheckpointData(yaffs_Device *dev)
++{
++ int ok = 1;
++
++ if (dev->skipCheckpointWrite || !dev->isYaffs2) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
++ ok = 0;
++ }
++
++ if (ok)
++ ok = yaffs_CheckpointOpen(dev, 1);
++
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++ ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
++ ok = yaffs_WriteCheckpointDevice(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
++ ok = yaffs_WriteCheckpointObjects(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++ ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
++ }
++
++ if (ok)
++ ok = yaffs_WriteCheckpointSum(dev);
++
++ if (!yaffs_CheckpointClose(dev))
++ ok = 0;
++
++ if (ok)
++ dev->isCheckpointed = 1;
++ else
++ dev->isCheckpointed = 0;
++
++ return dev->isCheckpointed;
++}
++
++static int yaffs_ReadCheckpointData(yaffs_Device *dev)
++{
++ int ok = 1;
++
++ if (dev->skipCheckpointRead || !dev->isYaffs2) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
++ ok = 0;
++ }
++
++ if (ok)
++ ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
++
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++ ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
++ ok = yaffs_ReadCheckpointDevice(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
++ ok = yaffs_ReadCheckpointObjects(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++ ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
++ }
++
++ if (ok) {
++ ok = yaffs_ReadCheckpointSum(dev);
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
++ }
++
++ if (!yaffs_CheckpointClose(dev))
++ ok = 0;
++
++ if (ok)
++ dev->isCheckpointed = 1;
++ else
++ dev->isCheckpointed = 0;
++
++ return ok ? 1 : 0;
++
++}
++
++static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
++{
++ if (dev->isCheckpointed ||
++ dev->blocksInCheckpoint > 0) {
++ dev->isCheckpointed = 0;
++ yaffs_CheckpointInvalidateStream(dev);
++ if (dev->superBlock && dev->markSuperBlockDirty)
++ dev->markSuperBlockDirty(dev->superBlock);
++ }
++}
++
++
++int yaffs_CheckpointSave(yaffs_Device *dev)
++{
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++
++ if (!dev->isCheckpointed) {
++ yaffs_InvalidateCheckpoint(dev);
++ yaffs_WriteCheckpointData(dev);
++ }
++
++ T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ return dev->isCheckpointed;
++}
++
++int yaffs_CheckpointRestore(yaffs_Device *dev)
++{
++ int retval;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ retval = yaffs_ReadCheckpointData(dev);
++
++ if (dev->isCheckpointed) {
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ return retval;
++}
++
++/*--------------------- File read/write ------------------------
++ * Read and write have very similar structures.
++ * In general the read/write has three parts to it
++ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
++ * Some complete chunks
++ * An incomplete chunk to end off with
++ *
++ * Curve-balls: the first chunk might also be the last chunk.
++ */
++
++int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
++ int nBytes)
++{
++
++ int chunk;
++ __u32 start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ yaffs_ChunkCache *cache;
++
++ yaffs_Device *dev;
++
++ dev = in->myDev;
++
++ while (n > 0) {
++ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
++ /* start = offset % dev->nDataBytesPerChunk; */
++ yaffs_AddrToChunk(dev, offset, &chunk, &start);
++ chunk++;
++
++ /* OK now check for the curveball where the start and end are in
++ * the same chunk.
++ */
++ if ((start + n) < dev->nDataBytesPerChunk)
++ nToCopy = n;
++ else
++ nToCopy = dev->nDataBytesPerChunk - start;
++
++ cache = yaffs_FindChunkCache(in, chunk);
++
++ /* If the chunk is already in the cache or it is less than a whole chunk
++ * or we're using inband tags then use the cache (if there is caching)
++ * else bypass the cache.
++ */
++ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
++ if (dev->nShortOpCaches > 0) {
++
++ /* If we can't find the data in the cache, then load it up. */
++
++ if (!cache) {
++ cache = yaffs_GrabChunkCache(in->myDev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ cache->
++ data);
++ cache->nBytes = 0;
++ }
++
++ yaffs_UseChunkCache(dev, cache, 0);
++
++ cache->locked = 1;
++
++
++ memcpy(buffer, &cache->data[start], nToCopy);
++
++ cache->locked = 0;
++ } else {
++ /* Read into the local buffer then copy..*/
++
++ __u8 *localBuffer =
++ yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ localBuffer);
++
++ memcpy(buffer, &localBuffer[start], nToCopy);
++
++
++ yaffs_ReleaseTempBuffer(dev, localBuffer,
++ __LINE__);
++ }
++
++ } else {
++
++ /* A full chunk. Read directly into the supplied buffer. */
++ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
++
++ }
++
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
++
++ }
++
++ return nDone;
++}
++
++int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
++ int nBytes, int writeThrough)
++{
++
++ int chunk;
++ __u32 start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ int nToWriteBack;
++ int startOfWrite = offset;
++ int chunkWritten = 0;
++ __u32 nBytesRead;
++ __u32 chunkStart;
++
++ yaffs_Device *dev;
++
++ dev = in->myDev;
++
++ while (n > 0 && chunkWritten >= 0) {
++ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
++ /* start = offset % dev->nDataBytesPerChunk; */
++ yaffs_AddrToChunk(dev, offset, &chunk, &start);
++
++ if (chunk * dev->nDataBytesPerChunk + start != offset ||
++ start >= dev->nDataBytesPerChunk) {
++ T(YAFFS_TRACE_ERROR, (
++ TSTR("AddrToChunk of offset %d gives chunk %d start %d"
++ TENDSTR),
++ (int)offset, chunk, start));
++ }
++ chunk++;
++
++ /* OK now check for the curveball where the start and end are in
++ * the same chunk.
++ */
++
++ if ((start + n) < dev->nDataBytesPerChunk) {
++ nToCopy = n;
++
++ /* Now folks, to calculate how many bytes to write back....
++ * If we're overwriting and not writing to then end of file then
++ * we need to write back as much as was there before.
++ */
++
++ chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
++
++ if (chunkStart > in->variant.fileVariant.fileSize)
++ nBytesRead = 0; /* Past end of file */
++ else
++ nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
++
++ if (nBytesRead > dev->nDataBytesPerChunk)
++ nBytesRead = dev->nDataBytesPerChunk;
++
++ nToWriteBack =
++ (nBytesRead >
++ (start + n)) ? nBytesRead : (start + n);
++
++ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
++ YBUG();
++
++ } else {
++ nToCopy = dev->nDataBytesPerChunk - start;
++ nToWriteBack = dev->nDataBytesPerChunk;
++ }
++
++ if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
++ /* An incomplete start or end chunk (or maybe both start and end chunk),
++ * or we're using inband tags, so we want to use the cache buffers.
++ */
++ if (dev->nShortOpCaches > 0) {
++ yaffs_ChunkCache *cache;
++ /* If we can't find the data in the cache, then load the cache */
++ cache = yaffs_FindChunkCache(in, chunk);
++
++ if (!cache
++ && yaffs_CheckSpaceForAllocation(in->
++ myDev)) {
++ cache = yaffs_GrabChunkCache(in->myDev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ cache->
++ data);
++ } else if (cache &&
++ !cache->dirty &&
++ !yaffs_CheckSpaceForAllocation(in->myDev)) {
++ /* Drop the cache if it was a read cache item and
++ * no space check has been made for it.
++ */
++ cache = NULL;
++ }
++
++ if (cache) {
++ yaffs_UseChunkCache(dev, cache, 1);
++ cache->locked = 1;
++
++
++ memcpy(&cache->data[start], buffer,
++ nToCopy);
++
++
++ cache->locked = 0;
++ cache->nBytes = nToWriteBack;
++
++ if (writeThrough) {
++ chunkWritten =
++ yaffs_WriteChunkDataToObject
++ (cache->object,
++ cache->chunkId,
++ cache->data, cache->nBytes,
++ 1);
++ cache->dirty = 0;
++ }
++
++ } else {
++ chunkWritten = -1; /* fail the write */
++ }
++ } else {
++ /* An incomplete start or end chunk (or maybe both start and end chunk)
++ * Read into the local buffer then copy, then copy over and write back.
++ */
++
++ __u8 *localBuffer =
++ yaffs_GetTempBuffer(dev, __LINE__);
++
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ localBuffer);
++
++
++
++ memcpy(&localBuffer[start], buffer, nToCopy);
++
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(in, chunk,
++ localBuffer,
++ nToWriteBack,
++ 0);
++
++ yaffs_ReleaseTempBuffer(dev, localBuffer,
++ __LINE__);
++
++ }
++
++ } else {
++ /* A full chunk. Write directly from the supplied buffer. */
++
++
++
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(in, chunk, buffer,
++ dev->nDataBytesPerChunk,
++ 0);
++
++ /* Since we've overwritten the cached data, we better invalidate it. */
++ yaffs_InvalidateChunkCache(in, chunk);
++ }
++
++ if (chunkWritten >= 0) {
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
++ }
++
++ }
++
++ /* Update file object */
++
++ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
++ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
++
++ in->dirty = 1;
++
++ return nDone;
++}
++
++
++/* ---------------------- File resizing stuff ------------------ */
++
++static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
++{
++
++ yaffs_Device *dev = in->myDev;
++ int oldFileSize = in->variant.fileVariant.fileSize;
++
++ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
++
++ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
++ dev->nDataBytesPerChunk;
++ int i;
++ int chunkId;
++
++ /* Delete backwards so that we don't end up with holes if
++ * power is lost part-way through the operation.
++ */
++ for (i = lastDel; i >= startDel; i--) {
++ /* NB this could be optimised somewhat,
++ * eg. could retrieve the tags and write them without
++ * using yaffs_DeleteChunk
++ */
++
++ chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
++ if (chunkId > 0) {
++ if (chunkId <
++ (dev->internalStartBlock * dev->nChunksPerBlock)
++ || chunkId >=
++ ((dev->internalEndBlock +
++ 1) * dev->nChunksPerBlock)) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Found daft chunkId %d for %d" TENDSTR),
++ chunkId, i));
++ } else {
++ in->nDataChunks--;
++ yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
++ }
++ }
++ }
++
++}
++
++int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
++{
++
++ int oldFileSize = in->variant.fileVariant.fileSize;
++ __u32 newSizeOfPartialChunk;
++ int newFullChunks;
++
++ yaffs_Device *dev = in->myDev;
++
++ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
++
++ yaffs_FlushFilesChunkCache(in);
++ yaffs_InvalidateWholeChunkCache(in);
++
++ yaffs_CheckGarbageCollection(dev);
++
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
++ return YAFFS_FAIL;
++
++ if (newSize == oldFileSize)
++ return YAFFS_OK;
++
++ if (newSize < oldFileSize) {
++
++ yaffs_PruneResizedChunks(in, newSize);
++
++ if (newSizeOfPartialChunk != 0) {
++ int lastChunk = 1 + newFullChunks;
++
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ /* Got to read and rewrite the last chunk with its new size and zero pad */
++ yaffs_ReadChunkDataFromObject(in, lastChunk,
++ localBuffer);
++
++ memset(localBuffer + newSizeOfPartialChunk, 0,
++ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
++
++ yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
++ newSizeOfPartialChunk, 1);
++
++ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
++ }
++
++ in->variant.fileVariant.fileSize = newSize;
++
++ yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
++ } else {
++ /* newsSize > oldFileSize */
++ in->variant.fileVariant.fileSize = newSize;
++ }
++
++
++ /* Write a new object header.
++ * show we've shrunk the file, if need be
++ * Do this only if the file is not in the deleted directories.
++ */
++ if (in->parent &&
++ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
++ in->parent->objectId != YAFFS_OBJECTID_DELETED)
++ yaffs_UpdateObjectHeader(in, NULL, 0,
++ (newSize < oldFileSize) ? 1 : 0, 0);
++
++ return YAFFS_OK;
++}
++
++loff_t yaffs_GetFileSize(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return obj->variant.fileVariant.fileSize;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return yaffs_strlen(obj->variant.symLinkVariant.alias);
++ default:
++ return 0;
++ }
++}
++
++
++
++int yaffs_FlushFile(yaffs_Object *in, int updateTime)
++{
++ int retVal;
++ if (in->dirty) {
++ yaffs_FlushFilesChunkCache(in);
++ if (updateTime) {
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(in->win_mtime);
++#else
++
++ in->yst_mtime = Y_CURRENT_TIME;
++
++#endif
++ }
++
++ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
++ 0) ? YAFFS_OK : YAFFS_FAIL;
++ } else {
++ retVal = YAFFS_OK;
++ }
++
++ return retVal;
++
++}
++
++static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
++{
++
++ /* First off, invalidate the file's data in the cache, without flushing. */
++ yaffs_InvalidateWholeChunkCache(in);
++
++ if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
++ /* Move to the unlinked directory so we have a record that it was deleted. */
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
++
++ }
++
++ yaffs_RemoveObjectFromDirectory(in);
++ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
++ in->hdrChunk = 0;
++
++ yaffs_FreeObject(in);
++ return YAFFS_OK;
++
++}
++
++/* yaffs_DeleteFile deletes the whole file data
++ * and the inode associated with the file.
++ * It does not delete the links associated with the file.
++ */
++static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
++{
++
++ int retVal;
++ int immediateDeletion = 0;
++
++#ifdef __KERNEL__
++ if (!in->myInode)
++ immediateDeletion = 1;
++#else
++ if (in->inUse <= 0)
++ immediateDeletion = 1;
++#endif
++
++ if (immediateDeletion) {
++ retVal =
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
++ _Y("deleted"), 0, 0);
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
++ in->objectId));
++ in->deleted = 1;
++ in->myDev->nDeletedFiles++;
++ if (1 || in->myDev->isYaffs2)
++ yaffs_ResizeFile(in, 0);
++ yaffs_SoftDeleteFile(in);
++ } else {
++ retVal =
++ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
++ _Y("unlinked"), 0, 0);
++ }
++
++
++ return retVal;
++}
++
++int yaffs_DeleteFile(yaffs_Object *in)
++{
++ int retVal = YAFFS_OK;
++ int deleted = in->deleted;
++
++ yaffs_ResizeFile(in, 0);
++
++ if (in->nDataChunks > 0) {
++ /* Use soft deletion if there is data in the file.
++ * That won't be the case if it has been resized to zero.
++ */
++ if (!in->unlinked)
++ retVal = yaffs_UnlinkFileIfNeeded(in);
++
++ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
++ in->deleted = 1;
++ deleted = 1;
++ in->myDev->nDeletedFiles++;
++ yaffs_SoftDeleteFile(in);
++ }
++ return deleted ? YAFFS_OK : YAFFS_FAIL;
++ } else {
++ /* The file has no data chunks so we toss it immediately */
++ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
++ in->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(in);
++
++ return YAFFS_OK;
++ }
++}
++
++static int yaffs_DeleteDirectory(yaffs_Object *in)
++{
++ /* First check that the directory is empty. */
++ if (ylist_empty(&in->variant.directoryVariant.children))
++ return yaffs_DoGenericObjectDeletion(in);
++
++ return YAFFS_FAIL;
++
++}
++
++static int yaffs_DeleteSymLink(yaffs_Object *in)
++{
++ YFREE(in->variant.symLinkVariant.alias);
++
++ return yaffs_DoGenericObjectDeletion(in);
++}
++
++static int yaffs_DeleteHardLink(yaffs_Object *in)
++{
++ /* remove this hardlink from the list assocaited with the equivalent
++ * object
++ */
++ ylist_del_init(&in->hardLinks);
++ return yaffs_DoGenericObjectDeletion(in);
++}
++
++int yaffs_DeleteObject(yaffs_Object *obj)
++{
++int retVal = -1;
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ retVal = yaffs_DeleteFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ return yaffs_DeleteDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ retVal = yaffs_DeleteSymLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ retVal = yaffs_DeleteHardLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ retVal = yaffs_DoGenericObjectDeletion(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ retVal = 0;
++ break; /* should not happen. */
++ }
++
++ return retVal;
++}
++
++static int yaffs_UnlinkWorker(yaffs_Object *obj)
++{
++
++ int immediateDeletion = 0;
++
++#ifdef __KERNEL__
++ if (!obj->myInode)
++ immediateDeletion = 1;
++#else
++ if (obj->inUse <= 0)
++ immediateDeletion = 1;
++#endif
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++ return yaffs_DeleteHardLink(obj);
++ } else if (!ylist_empty(&obj->hardLinks)) {
++ /* Curve ball: We're unlinking an object that has a hardlink.
++ *
++ * This problem arises because we are not strictly following
++ * The Linux link/inode model.
++ *
++ * We can't really delete the object.
++ * Instead, we do the following:
++ * - Select a hardlink.
++ * - Unhook it from the hard links
++ * - Unhook it from its parent directory (so that the rename can work)
++ * - Rename the object to the hardlink's name.
++ * - Delete the hardlink
++ */
++
++ yaffs_Object *hl;
++ int retVal;
++ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
++
++ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
++
++ ylist_del_init(&hl->hardLinks);
++ ylist_del_init(&hl->siblings);
++
++ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
++
++ retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
++
++ if (retVal == YAFFS_OK)
++ retVal = yaffs_DoGenericObjectDeletion(hl);
++
++ return retVal;
++
++ } else if (immediateDeletion) {
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return yaffs_DeleteFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ return yaffs_DeleteDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return yaffs_DeleteSymLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ return yaffs_DoGenericObjectDeletion(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ return YAFFS_FAIL;
++ }
++ } else
++ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
++ _Y("unlinked"), 0, 0);
++}
++
++
++static int yaffs_UnlinkObject(yaffs_Object *obj)
++{
++
++ if (obj && obj->unlinkAllowed)
++ return yaffs_UnlinkWorker(obj);
++
++ return YAFFS_FAIL;
++
++}
++int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
++{
++ yaffs_Object *obj;
++
++ obj = yaffs_FindObjectByName(dir, name);
++ return yaffs_UnlinkObject(obj);
++}
++
++/*----------------------- Initialisation Scanning ---------------------- */
++
++static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
++ int backwardScanning)
++{
++ yaffs_Object *obj;
++
++ if (!backwardScanning) {
++ /* Handle YAFFS1 forward scanning case
++ * For YAFFS1 we always do the deletion
++ */
++
++ } else {
++ /* Handle YAFFS2 case (backward scanning)
++ * If the shadowed object exists then ignore.
++ */
++ if (yaffs_FindObjectByNumber(dev, objId))
++ return;
++ }
++
++ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
++ * We put it in unlinked dir to be cleaned up after the scanning
++ */
++ obj =
++ yaffs_FindOrCreateObjectByNumber(dev, objId,
++ YAFFS_OBJECT_TYPE_FILE);
++ if (!obj)
++ return;
++ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
++ obj->variant.fileVariant.shrinkSize = 0;
++ obj->valid = 1; /* So that we don't read any other info for this file */
++
++}
++
++typedef struct {
++ int seq;
++ int block;
++} yaffs_BlockIndex;
++
++
++static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
++{
++ yaffs_Object *hl;
++ yaffs_Object *in;
++
++ while (hardList) {
++ hl = hardList;
++ hardList = (yaffs_Object *) (hardList->hardLinks.next);
++
++ in = yaffs_FindObjectByNumber(dev,
++ hl->variant.hardLinkVariant.
++ equivalentObjectId);
++
++ if (in) {
++ /* Add the hardlink pointers */
++ hl->variant.hardLinkVariant.equivalentObject = in;
++ ylist_add(&hl->hardLinks, &in->hardLinks);
++ } else {
++ /* Todo Need to report/handle this better.
++ * Got a problem... hardlink to a non-existant object
++ */
++ hl->variant.hardLinkVariant.equivalentObject = NULL;
++ YINIT_LIST_HEAD(&hl->hardLinks);
++
++ }
++ }
++}
++
++
++
++
++
++static int ybicmp(const void *a, const void *b)
++{
++ register int aseq = ((yaffs_BlockIndex *)a)->seq;
++ register int bseq = ((yaffs_BlockIndex *)b)->seq;
++ register int ablock = ((yaffs_BlockIndex *)a)->block;
++ register int bblock = ((yaffs_BlockIndex *)b)->block;
++ if (aseq == bseq)
++ return ablock - bblock;
++ else
++ return aseq - bseq;
++}
++
++
++struct yaffs_ShadowFixerStruct {
++ int objectId;
++ int shadowedId;
++ struct yaffs_ShadowFixerStruct *next;
++};
++
++
++static void yaffs_StripDeletedObjects(yaffs_Device *dev)
++{
++ /*
++ * Sort out state of unlinked and deleted objects after scanning.
++ */
++ struct ylist_head *i;
++ struct ylist_head *n;
++ yaffs_Object *l;
++
++ /* Soft delete all the unlinked files */
++ ylist_for_each_safe(i, n,
++ &dev->unlinkedDir->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++ yaffs_DeleteObject(l);
++ }
++ }
++
++ ylist_for_each_safe(i, n,
++ &dev->deletedDir->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++ yaffs_DeleteObject(l);
++ }
++ }
++
++}
++
++static int yaffs_Scan(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int result;
++
++ int chunk;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_BlockInfo *bi;
++ __u32 sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++
++ int alloc_failed = 0;
++
++ struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
++
++
++ __u8 *chunkData;
++
++
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
++ dev->internalStartBlock, dev->internalEndBlock));
++
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ /* Scan all the blocks to determine their state */
++ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
++ bi = yaffs_GetBlockInfo(dev, blk);
++ yaffs_ClearChunkBits(dev, blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
++ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++ state, sequenceNumber));
++
++ if (state == YAFFS_BLOCK_STATE_DEAD) {
++ T(YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("block %d is bad" TENDSTR), blk));
++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ }
++ }
++
++ startIterator = dev->internalStartBlock;
++ endIterator = dev->internalEndBlock;
++
++ /* For each block.... */
++ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
++ blockIterator++) {
++
++ YYIELD();
++
++ YYIELD();
++
++ blk = blockIterator;
++
++ bi = yaffs_GetBlockInfo(dev, blk);
++ state = bi->blockState;
++
++ deleted = 0;
++
++ /* For each chunk in each block that needs scanning....*/
++ for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
++ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
++ /* Read the tags and decide what to do */
++ chunk = blk * dev->nChunksPerBlock + c;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
++ &tags);
++
++ /* Let's have a good look at this chunk... */
++
++ if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
++ /* YAFFS1 only...
++ * A deleted chunk
++ */
++ deleted++;
++ dev->nFreeChunks++;
++ /*T((" %d %d deleted\n",blk,c)); */
++ } else if (!tags.chunkUsed) {
++ /* An unassigned chunk in the block
++ * This means that either the block is empty or
++ * this is the one being allocated from
++ */
++
++ if (c == 0) {
++ /* We're looking at the first chunk in the block so the block is unused */
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ } else {
++ /* this is the block being allocated from */
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ (" Allocating from %d %d" TENDSTR),
++ blk, c));
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk;
++ /* Set it to here to encourage the allocator to go forth from here. */
++
++ }
++
++ dev->nFreeChunks += (dev->nChunksPerBlock - c);
++ } else if (tags.chunkId > 0) {
++ /* chunkId > 0 so it is a data chunk... */
++ unsigned int endpos;
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ YAFFS_OBJECT_TYPE_FILE);
++ /* PutChunkIntoFile checks for a clash (two data chunks with
++ * the same chunkId).
++ */
++
++ if (!in)
++ alloc_failed = 1;
++
++ if (in) {
++ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
++ alloc_failed = 1;
++ }
++
++ endpos =
++ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
++ tags.byteCount;
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
++ && in->variant.fileVariant.scannedFileSize <
++ endpos) {
++ in->variant.fileVariant.
++ scannedFileSize = endpos;
++ if (!dev->useHeaderFileSize) {
++ in->variant.fileVariant.
++ fileSize =
++ in->variant.fileVariant.
++ scannedFileSize;
++ }
++
++ }
++ /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
++ } else {
++ /* chunkId == 0, so it is an ObjectHeader.
++ * Thus, we read in the object header and make the object
++ */
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
++ chunkData,
++ NULL);
++
++ oh = (yaffs_ObjectHeader *) chunkData;
++
++ in = yaffs_FindObjectByNumber(dev,
++ tags.objectId);
++ if (in && in->variantType != oh->type) {
++ /* This should not happen, but somehow
++ * Wev'e ended up with an objectId that has been reused but not yet
++ * deleted, and worse still it has changed type. Delete the old object.
++ */
++
++ yaffs_DeleteObject(in);
++
++ in = 0;
++ }
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ oh->type);
++
++ if (!in)
++ alloc_failed = 1;
++
++ if (in && oh->shadowsObject > 0) {
++
++ struct yaffs_ShadowFixerStruct *fixer;
++ fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
++ if (fixer) {
++ fixer->next = shadowFixerList;
++ shadowFixerList = fixer;
++ fixer->objectId = tags.objectId;
++ fixer->shadowedId = oh->shadowsObject;
++ }
++
++ }
++
++ if (in && in->valid) {
++ /* We have already filled this one. We have a duplicate and need to resolve it. */
++
++ unsigned existingSerial = in->serial;
++ unsigned newSerial = tags.serialNumber;
++
++ if (((existingSerial + 1) & 3) == newSerial) {
++ /* Use new one - destroy the exisiting one */
++ yaffs_DeleteChunk(dev,
++ in->hdrChunk,
++ 1, __LINE__);
++ in->valid = 0;
++ } else {
++ /* Use existing - destroy this one. */
++ yaffs_DeleteChunk(dev, chunk, 1,
++ __LINE__);
++ }
++ }
++
++ if (in && !in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
++ /* We only load some info, don't fiddle with directory structure */
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->hdrChunk = chunk;
++ in->serial = tags.serialNumber;
++
++ } else if (in && !in->valid) {
++ /* we need to load this info */
++
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->hdrChunk = chunk;
++ in->serial = tags.serialNumber;
++
++ yaffs_SetObjectName(in, oh->name);
++ in->dirty = 0;
++
++ /* directory stuff...
++ * hook up to parent
++ */
++
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, oh->parentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ if (!parent)
++ alloc_failed = 1;
++ if (parent && parent->variantType ==
++ YAFFS_OBJECT_TYPE_UNKNOWN) {
++ /* Set up as a directory */
++ parent->variantType =
++ YAFFS_OBJECT_TYPE_DIRECTORY;
++ YINIT_LIST_HEAD(&parent->variant.
++ directoryVariant.
++ children);
++ } else if (!parent || parent->variantType !=
++ YAFFS_OBJECT_TYPE_DIRECTORY) {
++ /* Hoosterman, another problem....
++ * We're trying to use a non-directory as a directory
++ */
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++ TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ if (0 && (parent == dev->deletedDir ||
++ parent == dev->unlinkedDir)) {
++ in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
++ dev->nDeletedFiles++;
++ }
++ /* Note re hardlinks.
++ * Since we might scan a hardlink before its equivalent object is scanned
++ * we put them all in a list.
++ * After scanning is complete, we should have all the objects, so we run through this
++ * list and fix up all the chains.
++ */
++
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Todo got a problem */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ if (dev->useHeaderFileSize)
++
++ in->variant.fileVariant.
++ fileSize =
++ oh->fileSize;
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.
++ equivalentObjectId =
++ oh->equivalentObjectId;
++ in->hardLinks.next =
++ (struct ylist_head *)
++ hardList;
++ hardList = in;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
++ break;
++ }
++
++/*
++ if (parent == dev->deletedDir) {
++ yaffs_DestroyObject(in);
++ bi->hasShrinkHeader = 1;
++ }
++*/
++ }
++ }
++ }
++
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ /* If we got this far while scanning, then the block is fully allocated.*/
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++ bi->blockState = state;
++
++ /* Now let's see if it was dirty */
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
++ yaffs_BlockBecameDirty(dev, blk);
++ }
++
++ }
++
++
++ /* Ok, we've done all the scanning.
++ * Fix up the hard link chains.
++ * We should now have scanned all the objects, now it's time to add these
++ * hardlinks.
++ */
++
++ yaffs_HardlinkFixup(dev, hardList);
++
++ /* Fix up any shadowed objects */
++ {
++ struct yaffs_ShadowFixerStruct *fixer;
++ yaffs_Object *obj;
++
++ while (shadowFixerList) {
++ fixer = shadowFixerList;
++ shadowFixerList = fixer->next;
++ /* Complete the rename transaction by deleting the shadowed object
++ * then setting the object header to unshadowed.
++ */
++ obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
++ if (obj)
++ yaffs_DeleteObject(obj);
++
++ obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
++
++ if (obj)
++ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++
++ YFREE(fixer);
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++
++ if (alloc_failed)
++ return YAFFS_FAIL;
++
++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
++
++
++ return YAFFS_OK;
++}
++
++static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
++{
++ __u8 *chunkData;
++ yaffs_ObjectHeader *oh;
++ yaffs_Device *dev;
++ yaffs_ExtendedTags tags;
++ int result;
++ int alloc_failed = 0;
++
++ if (!in)
++ return;
++
++ dev = in->myDev;
++
++#if 0
++ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
++ in->objectId,
++ in->lazyLoaded ? "not yet" : "already"));
++#endif
++
++ if (in->lazyLoaded && in->hdrChunk > 0) {
++ in->lazyLoaded = 0;
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
++ oh = (yaffs_ObjectHeader *) chunkData;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++
++#endif
++ yaffs_SetObjectName(in, oh->name);
++
++ if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1; /* Not returned to caller */
++ }
++
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++ }
++}
++
++static int yaffs_ScanBackwards(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int nBlocksToScan = 0;
++
++ int chunk;
++ int result;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_BlockInfo *bi;
++ __u32 sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++ int itsUnlinked;
++ __u8 *chunkData;
++
++ int fileSize;
++ int isShrink;
++ int foundChunksInBlock;
++ int equivalentObjectId;
++ int alloc_failed = 0;
++
++
++ yaffs_BlockIndex *blockIndex = NULL;
++ int altBlockIndex = 0;
++
++ if (!dev->isYaffs2) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
++ TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
++
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++
++ if (!blockIndex) {
++ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
++ altBlockIndex = 1;
++ }
++
++ if (!blockIndex) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ dev->blocksInCheckpoint = 0;
++
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++
++ /* Scan all the blocks to determine their state */
++ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
++ bi = yaffs_GetBlockInfo(dev, blk);
++ yaffs_ClearChunkBits(dev, blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
++ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
++ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++ state, sequenceNumber));
++
++
++ if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
++ dev->blocksInCheckpoint++;
++
++ } else if (state == YAFFS_BLOCK_STATE_DEAD) {
++ T(YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("block %d is bad" TENDSTR), blk));
++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++
++ /* Determine the highest sequence number */
++ if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
++ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
++
++ blockIndex[nBlocksToScan].seq = sequenceNumber;
++ blockIndex[nBlocksToScan].block = blk;
++
++ nBlocksToScan++;
++
++ if (sequenceNumber >= dev->sequenceNumber)
++ dev->sequenceNumber = sequenceNumber;
++ } else {
++ /* TODO: Nasty sequence number! */
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ ("Block scanning block %d has bad sequence number %d"
++ TENDSTR), blk, sequenceNumber));
++
++ }
++ }
++ }
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
++
++
++
++ YYIELD();
++
++ /* Sort the blocks */
++#ifndef CONFIG_YAFFS_USE_OWN_SORT
++ {
++ /* Use qsort now. */
++ yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
++ }
++#else
++ {
++ /* Dungy old bubble sort... */
++
++ yaffs_BlockIndex temp;
++ int i;
++ int j;
++
++ for (i = 0; i < nBlocksToScan; i++)
++ for (j = i + 1; j < nBlocksToScan; j++)
++ if (blockIndex[i].seq > blockIndex[j].seq) {
++ temp = blockIndex[j];
++ blockIndex[j] = blockIndex[i];
++ blockIndex[i] = temp;
++ }
++ }
++#endif
++
++ YYIELD();
++
++ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
++
++ /* Now scan the blocks looking at the data. */
++ startIterator = 0;
++ endIterator = nBlocksToScan - 1;
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
++
++ /* For each block.... backwards */
++ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
++ blockIterator--) {
++ /* Cooperative multitasking! This loop can run for so
++ long that watchdog timers expire. */
++ YYIELD();
++
++ /* get the block to scan in the correct order */
++ blk = blockIndex[blockIterator].block;
++
++ bi = yaffs_GetBlockInfo(dev, blk);
++
++
++ state = bi->blockState;
++
++ deleted = 0;
++
++ /* For each chunk in each block that needs scanning.... */
++ foundChunksInBlock = 0;
++ for (c = dev->nChunksPerBlock - 1;
++ !alloc_failed && c >= 0 &&
++ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
++ /* Scan backwards...
++ * Read the tags and decide what to do
++ */
++
++ chunk = blk * dev->nChunksPerBlock + c;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
++ &tags);
++
++ /* Let's have a good look at this chunk... */
++
++ if (!tags.chunkUsed) {
++ /* An unassigned chunk in the block.
++ * If there are used chunks after this one, then
++ * it is a chunk that was skipped due to failing the erased
++ * check. Just skip it so that it can be deleted.
++ * But, more typically, We get here when this is an unallocated
++ * chunk and his means that either the block is empty or
++ * this is the one being allocated from
++ */
++
++ if (foundChunksInBlock) {
++ /* This is a chunk that was skipped due to failing the erased check */
++ } else if (c == 0) {
++ /* We're looking at the first chunk in the block so the block is unused */
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ } else {
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ state == YAFFS_BLOCK_STATE_ALLOCATING) {
++ if (dev->sequenceNumber == bi->sequenceNumber) {
++ /* this is the block being allocated from */
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ (" Allocating from %d %d"
++ TENDSTR), blk, c));
++
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk;
++ } else {
++ /* This is a partially written block that is not
++ * the current allocation block. This block must have
++ * had a write failure, so set up for retirement.
++ */
++
++ /* bi->needsRetiring = 1; ??? TODO */
++ bi->gcPrioritise = 1;
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Partially written block %d detected" TENDSTR),
++ blk));
++ }
++ }
++ }
++
++ dev->nFreeChunks++;
++
++ } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
++ blk, c));
++
++ dev->nFreeChunks++;
++
++ } else if (tags.chunkId > 0) {
++ /* chunkId > 0 so it is a data chunk... */
++ unsigned int endpos;
++ __u32 chunkBase =
++ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
++
++ foundChunksInBlock = 1;
++
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ YAFFS_OBJECT_TYPE_FILE);
++ if (!in) {
++ /* Out of memory */
++ alloc_failed = 1;
++ }
++
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
++ && chunkBase <
++ in->variant.fileVariant.shrinkSize) {
++ /* This has not been invalidated by a resize */
++ if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
++ chunk, -1)) {
++ alloc_failed = 1;
++ }
++
++ /* File size is calculated by looking at the data chunks if we have not
++ * seen an object header yet. Stop this practice once we find an object header.
++ */
++ endpos =
++ (tags.chunkId -
++ 1) * dev->nDataBytesPerChunk +
++ tags.byteCount;
++
++ if (!in->valid && /* have not got an object header yet */
++ in->variant.fileVariant.
++ scannedFileSize < endpos) {
++ in->variant.fileVariant.
++ scannedFileSize = endpos;
++ in->variant.fileVariant.
++ fileSize =
++ in->variant.fileVariant.
++ scannedFileSize;
++ }
++
++ } else if (in) {
++ /* This chunk has been invalidated by a resize, so delete */
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++
++ }
++ } else {
++ /* chunkId == 0, so it is an ObjectHeader.
++ * Thus, we read in the object header and make the object
++ */
++ foundChunksInBlock = 1;
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ oh = NULL;
++ in = NULL;
++
++ if (tags.extraHeaderInfoAvailable) {
++ in = yaffs_FindOrCreateObjectByNumber
++ (dev, tags.objectId,
++ tags.extraObjectType);
++ if (!in)
++ alloc_failed = 1;
++ }
++
++ if (!in ||
++#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
++ !in->valid ||
++#endif
++ tags.extraShadows ||
++ (!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
++
++ /* If we don't have valid info then we need to read the chunk
++ * TODO In future we can probably defer reading the chunk and
++ * living with invalid data until needed.
++ */
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev,
++ chunk,
++ chunkData,
++ NULL);
++
++ oh = (yaffs_ObjectHeader *) chunkData;
++
++ if (dev->inbandTags) {
++ /* Fix up the header if they got corrupted by inband tags */
++ oh->shadowsObject = oh->inbandShadowsObject;
++ oh->isShrink = oh->inbandIsShrink;
++ }
++
++ if (!in) {
++ in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
++ if (!in)
++ alloc_failed = 1;
++ }
++
++ }
++
++ if (!in) {
++ /* TODO Hoosterman we have a problem! */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
++ TENDSTR), tags.objectId, chunk));
++ continue;
++ }
++
++ if (in->valid) {
++ /* We have already filled this one.
++ * We have a duplicate that will be discarded, but
++ * we first have to suck out resize info if it is a file.
++ */
++
++ if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
++ ((oh &&
++ oh->type == YAFFS_OBJECT_TYPE_FILE) ||
++ (tags.extraHeaderInfoAvailable &&
++ tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
++ __u32 thisSize =
++ (oh) ? oh->fileSize : tags.
++ extraFileLength;
++ __u32 parentObjectId =
++ (oh) ? oh->
++ parentObjectId : tags.
++ extraParentObjectId;
++
++
++ isShrink =
++ (oh) ? oh->isShrink : tags.
++ extraIsShrinkHeader;
++
++ /* If it is deleted (unlinked at start also means deleted)
++ * we treat the file size as being zeroed at this point.
++ */
++ if (parentObjectId ==
++ YAFFS_OBJECTID_DELETED
++ || parentObjectId ==
++ YAFFS_OBJECTID_UNLINKED) {
++ thisSize = 0;
++ isShrink = 1;
++ }
++
++ if (isShrink &&
++ in->variant.fileVariant.
++ shrinkSize > thisSize) {
++ in->variant.fileVariant.
++ shrinkSize =
++ thisSize;
++ }
++
++ if (isShrink)
++ bi->hasShrinkHeader = 1;
++
++ }
++ /* Use existing - destroy this one. */
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++
++ }
++
++ if (!in->valid && in->variantType !=
++ (oh ? oh->type : tags.extraObjectType))
++ T(YAFFS_TRACE_ERROR, (
++ TSTR("yaffs tragedy: Bad object type, "
++ TCONT("%d != %d, for object %d at chunk ")
++ TCONT("%d during scan")
++ TENDSTR), oh ?
++ oh->type : tags.extraObjectType,
++ in->variantType, tags.objectId,
++ chunk));
++
++ if (!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId ==
++ YAFFS_OBJECTID_LOSTNFOUND)) {
++ /* We only load some info, don't fiddle with directory structure */
++ in->valid = 1;
++
++ if (oh) {
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++
++#endif
++ } else {
++ in->variantType = tags.extraObjectType;
++ in->lazyLoaded = 1;
++ }
++
++ in->hdrChunk = chunk;
++
++ } else if (!in->valid) {
++ /* we need to load this info */
++
++ in->valid = 1;
++ in->hdrChunk = chunk;
++
++ if (oh) {
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++
++ if (oh->shadowsObject > 0)
++ yaffs_HandleShadowedObject(dev,
++ oh->
++ shadowsObject,
++ 1);
++
++
++ yaffs_SetObjectName(in, oh->name);
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, oh->parentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++
++ fileSize = oh->fileSize;
++ isShrink = oh->isShrink;
++ equivalentObjectId = oh->equivalentObjectId;
++
++ } else {
++ in->variantType = tags.extraObjectType;
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, tags.extraParentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ fileSize = tags.extraFileLength;
++ isShrink = tags.extraIsShrinkHeader;
++ equivalentObjectId = tags.extraEquivalentObjectId;
++ in->lazyLoaded = 1;
++
++ }
++ in->dirty = 0;
++
++ if (!parent)
++ alloc_failed = 1;
++
++ /* directory stuff...
++ * hook up to parent
++ */
++
++ if (parent && parent->variantType ==
++ YAFFS_OBJECT_TYPE_UNKNOWN) {
++ /* Set up as a directory */
++ parent->variantType =
++ YAFFS_OBJECT_TYPE_DIRECTORY;
++ YINIT_LIST_HEAD(&parent->variant.
++ directoryVariant.
++ children);
++ } else if (!parent || parent->variantType !=
++ YAFFS_OBJECT_TYPE_DIRECTORY) {
++ /* Hoosterman, another problem....
++ * We're trying to use a non-directory as a directory
++ */
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++ TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ itsUnlinked = (parent == dev->deletedDir) ||
++ (parent == dev->unlinkedDir);
++
++ if (isShrink) {
++ /* Mark the block as having a shrinkHeader */
++ bi->hasShrinkHeader = 1;
++ }
++
++ /* Note re hardlinks.
++ * Since we might scan a hardlink before its equivalent object is scanned
++ * we put them all in a list.
++ * After scanning is complete, we should have all the objects, so we run
++ * through this list and fix up all the chains.
++ */
++
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Todo got a problem */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++
++ if (in->variant.fileVariant.
++ scannedFileSize < fileSize) {
++ /* This covers the case where the file size is greater
++ * than where the data is
++ * This will happen if the file is resized to be larger
++ * than its current data extents.
++ */
++ in->variant.fileVariant.fileSize = fileSize;
++ in->variant.fileVariant.scannedFileSize =
++ in->variant.fileVariant.fileSize;
++ }
++
++ if (isShrink &&
++ in->variant.fileVariant.shrinkSize > fileSize) {
++ in->variant.fileVariant.shrinkSize = fileSize;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ if (!itsUnlinked) {
++ in->variant.hardLinkVariant.equivalentObjectId =
++ equivalentObjectId;
++ in->hardLinks.next =
++ (struct ylist_head *) hardList;
++ hardList = in;
++ }
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ if (oh) {
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
++ }
++ break;
++ }
++
++ }
++
++ }
++
++ } /* End of scanning for each chunk */
++
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ /* If we got this far while scanning, then the block is fully allocated. */
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++ bi->blockState = state;
++
++ /* Now let's see if it was dirty */
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
++ yaffs_BlockBecameDirty(dev, blk);
++ }
++
++ }
++
++ if (altBlockIndex)
++ YFREE_ALT(blockIndex);
++ else
++ YFREE(blockIndex);
++
++ /* Ok, we've done all the scanning.
++ * Fix up the hard link chains.
++ * We should now have scanned all the objects, now it's time to add these
++ * hardlinks.
++ */
++ yaffs_HardlinkFixup(dev, hardList);
++
++
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++
++ if (alloc_failed)
++ return YAFFS_FAIL;
++
++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++/*------------------------------ Directory Functions ----------------------------- */
++
++static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
++{
++ struct ylist_head *lh;
++ yaffs_Object *listObj;
++
++ int count = 0;
++
++ if (!obj) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
++ YBUG();
++ return;
++ }
++
++ if (yaffs_SkipVerification(obj->myDev))
++ return;
++
++ if (!obj->parent) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
++ YBUG();
++ return;
++ }
++
++ if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
++ YBUG();
++ }
++
++ /* Iterate through the objects in each hash entry */
++
++ ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
++ if (lh) {
++ listObj = ylist_entry(lh, yaffs_Object, siblings);
++ yaffs_VerifyObject(listObj);
++ if (obj == listObj)
++ count++;
++ }
++ }
++
++ if (count != 1) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
++ YBUG();
++ }
++}
++
++static void yaffs_VerifyDirectory(yaffs_Object *directory)
++{
++ struct ylist_head *lh;
++ yaffs_Object *listObj;
++
++ if (!directory) {
++ YBUG();
++ return;
++ }
++
++ if (yaffs_SkipFullVerification(directory->myDev))
++ return;
++
++ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
++ YBUG();
++ }
++
++ /* Iterate through the objects in each hash entry */
++
++ ylist_for_each(lh, &directory->variant.directoryVariant.children) {
++ if (lh) {
++ listObj = ylist_entry(lh, yaffs_Object, siblings);
++ if (listObj->parent != directory) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
++ YBUG();
++ }
++ yaffs_VerifyObjectInDirectory(listObj);
++ }
++ }
++}
++
++
++static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
++{
++ yaffs_Device *dev = obj->myDev;
++ yaffs_Object *parent;
++
++ yaffs_VerifyObjectInDirectory(obj);
++ parent = obj->parent;
++
++ yaffs_VerifyDirectory(parent);
++
++ if (dev && dev->removeObjectCallback)
++ dev->removeObjectCallback(obj);
++
++
++ ylist_del_init(&obj->siblings);
++ obj->parent = NULL;
++
++ yaffs_VerifyDirectory(parent);
++}
++
++
++static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
++ yaffs_Object *obj)
++{
++ if (!directory) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: Trying to add an object to a null pointer directory"
++ TENDSTR)));
++ YBUG();
++ return;
++ }
++ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: Trying to add an object to a non-directory"
++ TENDSTR)));
++ YBUG();
++ }
++
++ if (obj->siblings.prev == NULL) {
++ /* Not initialised */
++ YBUG();
++ }
++
++
++ yaffs_VerifyDirectory(directory);
++
++ yaffs_RemoveObjectFromDirectory(obj);
++
++
++ /* Now add it */
++ ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
++ obj->parent = directory;
++
++ if (directory == obj->myDev->unlinkedDir
++ || directory == obj->myDev->deletedDir) {
++ obj->unlinked = 1;
++ obj->myDev->nUnlinkedFiles++;
++ obj->renameAllowed = 0;
++ }
++
++ yaffs_VerifyDirectory(directory);
++ yaffs_VerifyObjectInDirectory(obj);
++}
++
++yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
++ const YCHAR *name)
++{
++ int sum;
++
++ struct ylist_head *i;
++ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
++
++ yaffs_Object *l;
++
++ if (!name)
++ return NULL;
++
++ if (!directory) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_FindObjectByName: null pointer directory"
++ TENDSTR)));
++ YBUG();
++ return NULL;
++ }
++ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
++ YBUG();
++ }
++
++ sum = yaffs_CalcNameSum(name);
++
++ ylist_for_each(i, &directory->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++
++ if (l->parent != directory)
++ YBUG();
++
++ yaffs_CheckObjectDetailsLoaded(l);
++
++ /* Special case for lost-n-found */
++ if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
++ if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
++ return l;
++ } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
++ /* LostnFound chunk called Objxxx
++ * Do a real check
++ */
++ yaffs_GetObjectName(l, buffer,
++ YAFFS_MAX_NAME_LENGTH);
++ if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
++ return l;
++ }
++ }
++ }
++
++ return NULL;
++}
++
++
++#if 0
++int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
++ int (*fn) (yaffs_Object *))
++{
++ struct ylist_head *i;
++ yaffs_Object *l;
++
++ if (!theDir) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_FindObjectByName: null pointer directory"
++ TENDSTR)));
++ YBUG();
++ return YAFFS_FAIL;
++ }
++ if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
++ YBUG();
++ return YAFFS_FAIL;
++ }
++
++ ylist_for_each(i, &theDir->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++ if (l && !fn(l))
++ return YAFFS_FAIL;
++ }
++ }
++
++ return YAFFS_OK;
++
++}
++#endif
++
++/* GetEquivalentObject dereferences any hard links to get to the
++ * actual object.
++ */
++
++yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
++{
++ if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++ /* We want the object id of the equivalent object, not this one */
++ obj = obj->variant.hardLinkVariant.equivalentObject;
++ yaffs_CheckObjectDetailsLoaded(obj);
++ }
++ return obj;
++}
++
++int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
++{
++ memset(name, 0, buffSize * sizeof(YCHAR));
++
++ yaffs_CheckObjectDetailsLoaded(obj);
++
++ if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
++ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
++ } else if (obj->hdrChunk <= 0) {
++ YCHAR locName[20];
++ YCHAR numString[20];
++ YCHAR *x = &numString[19];
++ unsigned v = obj->objectId;
++ numString[19] = 0;
++ while (v > 0) {
++ x--;
++ *x = '0' + (v % 10);
++ v /= 10;
++ }
++ /* make up a name */
++ yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
++ yaffs_strcat(locName, x);
++ yaffs_strncpy(name, locName, buffSize - 1);
++
++ }
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ else if (obj->shortName[0])
++ yaffs_strcpy(name, obj->shortName);
++#endif
++ else {
++ int result;
++ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
++
++ yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
++
++ memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
++
++ if (obj->hdrChunk > 0) {
++ result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
++ obj->hdrChunk, buffer,
++ NULL);
++ }
++ yaffs_strncpy(name, oh->name, buffSize - 1);
++
++ yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
++ }
++
++ return yaffs_strlen(name);
++}
++
++int yaffs_GetObjectFileLength(yaffs_Object *obj)
++{
++ /* Dereference any hard linking */
++ obj = yaffs_GetEquivalentObject(obj);
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ return obj->variant.fileVariant.fileSize;
++ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
++ return yaffs_strlen(obj->variant.symLinkVariant.alias);
++ else {
++ /* Only a directory should drop through to here */
++ return obj->myDev->nDataBytesPerChunk;
++ }
++}
++
++int yaffs_GetObjectLinkCount(yaffs_Object *obj)
++{
++ int count = 0;
++ struct ylist_head *i;
++
++ if (!obj->unlinked)
++ count++; /* the object itself */
++
++ ylist_for_each(i, &obj->hardLinks)
++ count++; /* add the hard links; */
++
++ return count;
++}
++
++int yaffs_GetObjectInode(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ return obj->objectId;
++}
++
++unsigned yaffs_GetObjectType(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return DT_REG;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ return DT_DIR;
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return DT_LNK;
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ return DT_REG;
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ if (S_ISFIFO(obj->yst_mode))
++ return DT_FIFO;
++ if (S_ISCHR(obj->yst_mode))
++ return DT_CHR;
++ if (S_ISBLK(obj->yst_mode))
++ return DT_BLK;
++ if (S_ISSOCK(obj->yst_mode))
++ return DT_SOCK;
++ default:
++ return DT_REG;
++ break;
++ }
++}
++
++YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
++ return yaffs_CloneString(obj->variant.symLinkVariant.alias);
++ else
++ return yaffs_CloneString(_Y(""));
++}
++
++#ifndef CONFIG_YAFFS_WINCE
++
++int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
++{
++ unsigned int valid = attr->ia_valid;
++
++ if (valid & ATTR_MODE)
++ obj->yst_mode = attr->ia_mode;
++ if (valid & ATTR_UID)
++ obj->yst_uid = attr->ia_uid;
++ if (valid & ATTR_GID)
++ obj->yst_gid = attr->ia_gid;
++
++ if (valid & ATTR_ATIME)
++ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
++ if (valid & ATTR_CTIME)
++ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
++ if (valid & ATTR_MTIME)
++ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
++
++ if (valid & ATTR_SIZE)
++ yaffs_ResizeFile(obj, attr->ia_size);
++
++ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++
++ return YAFFS_OK;
++
++}
++int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
++{
++ unsigned int valid = 0;
++
++ attr->ia_mode = obj->yst_mode;
++ valid |= ATTR_MODE;
++ attr->ia_uid = obj->yst_uid;
++ valid |= ATTR_UID;
++ attr->ia_gid = obj->yst_gid;
++ valid |= ATTR_GID;
++
++ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
++ valid |= ATTR_ATIME;
++ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
++ valid |= ATTR_CTIME;
++ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
++ valid |= ATTR_MTIME;
++
++ attr->ia_size = yaffs_GetFileSize(obj);
++ valid |= ATTR_SIZE;
++
++ attr->ia_valid = valid;
++
++ return YAFFS_OK;
++}
++
++#endif
++
++#if 0
++int yaffs_DumpObject(yaffs_Object *obj)
++{
++ YCHAR name[257];
++
++ yaffs_GetObjectName(obj, name, 256);
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
++ " chunk %d type %d size %d\n"
++ TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
++ obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
++ yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
++
++ return YAFFS_OK;
++}
++#endif
++
++/*---------------------------- Initialisation code -------------------------------------- */
++
++static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
++{
++
++ /* Common functions, gotta have */
++ if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
++ return 0;
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++ /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
++ if (dev->writeChunkWithTagsToNAND &&
++ dev->readChunkWithTagsFromNAND &&
++ !dev->writeChunkToNAND &&
++ !dev->readChunkFromNAND &&
++ dev->markNANDBlockBad && dev->queryNANDBlock)
++ return 1;
++#endif
++
++ /* Can use the "spare" style interface for yaffs1 */
++ if (!dev->isYaffs2 &&
++ !dev->writeChunkWithTagsToNAND &&
++ !dev->readChunkWithTagsFromNAND &&
++ dev->writeChunkToNAND &&
++ dev->readChunkFromNAND &&
++ !dev->markNANDBlockBad && !dev->queryNANDBlock)
++ return 1;
++
++ return 0; /* bad */
++}
++
++
++static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
++{
++ /* Initialise the unlinked, deleted, root and lost and found directories */
++
++ dev->lostNFoundDir = dev->rootDir = NULL;
++ dev->unlinkedDir = dev->deletedDir = NULL;
++
++ dev->unlinkedDir =
++ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
++
++ dev->deletedDir =
++ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
++
++ dev->rootDir =
++ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
++ YAFFS_ROOT_MODE | S_IFDIR);
++ dev->lostNFoundDir =
++ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
++ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
++
++ if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
++ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
++ return YAFFS_OK;
++ }
++
++ return YAFFS_FAIL;
++}
++
++int yaffs_GutsInitialise(yaffs_Device *dev)
++{
++ int init_failed = 0;
++ unsigned x;
++ int bits;
++
++ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
++
++ /* Check stuff that must be set */
++
++ if (!dev) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ dev->internalStartBlock = dev->startBlock;
++ dev->internalEndBlock = dev->endBlock;
++ dev->blockOffset = 0;
++ dev->chunkOffset = 0;
++ dev->nFreeChunks = 0;
++
++ dev->gcBlock = -1;
++
++ if (dev->startBlock == 0) {
++ dev->internalStartBlock = dev->startBlock + 1;
++ dev->internalEndBlock = dev->endBlock + 1;
++ dev->blockOffset = 1;
++ dev->chunkOffset = dev->nChunksPerBlock;
++ }
++
++ /* Check geometry parameters. */
++
++ if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
++ (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
++ (dev->inbandTags && !dev->isYaffs2) ||
++ dev->nChunksPerBlock < 2 ||
++ dev->nReservedBlocks < 2 ||
++ dev->internalStartBlock <= 0 ||
++ dev->internalEndBlock <= 0 ||
++ dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
++ TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
++ return YAFFS_FAIL;
++ }
++
++ if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Sort out space for inband tags, if required */
++ if (dev->inbandTags)
++ dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
++ else
++ dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
++
++ /* Got the right mix of functions? */
++ if (!yaffs_CheckDevFunctions(dev)) {
++ /* Function missing */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
++
++ return YAFFS_FAIL;
++ }
++
++ /* This is really a compilation check. */
++ if (!yaffs_CheckStructures()) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ if (dev->isMounted) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: device already mounted\n" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Finished with most checks. One or two more checks happen later on too. */
++
++ dev->isMounted = 1;
++
++ /* OK now calculate a few things for the device */
++
++ /*
++ * Calculate all the chunk size manipulation numbers:
++ */
++ x = dev->nDataBytesPerChunk;
++ /* We always use dev->chunkShift and dev->chunkDiv */
++ dev->chunkShift = Shifts(x);
++ x >>= dev->chunkShift;
++ dev->chunkDiv = x;
++ /* We only use chunk mask if chunkDiv is 1 */
++ dev->chunkMask = (1<<dev->chunkShift) - 1;
++
++ /*
++ * Calculate chunkGroupBits.
++ * We need to find the next power of 2 > than internalEndBlock
++ */
++
++ x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
++
++ bits = ShiftsGE(x);
++
++ /* Set up tnode width if wide tnodes are enabled. */
++ if (!dev->wideTnodesDisabled) {
++ /* bits must be even so that we end up with 32-bit words */
++ if (bits & 1)
++ bits++;
++ if (bits < 16)
++ dev->tnodeWidth = 16;
++ else
++ dev->tnodeWidth = bits;
++ } else
++ dev->tnodeWidth = 16;
++
++ dev->tnodeMask = (1<<dev->tnodeWidth)-1;
++
++ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
++ * so if the bitwidth of the
++ * chunk range we're using is greater than 16 we need
++ * to figure out chunk shift and chunkGroupSize
++ */
++
++ if (bits <= dev->tnodeWidth)
++ dev->chunkGroupBits = 0;
++ else
++ dev->chunkGroupBits = bits - dev->tnodeWidth;
++
++
++ dev->chunkGroupSize = 1 << dev->chunkGroupBits;
++
++ if (dev->nChunksPerBlock < dev->chunkGroupSize) {
++ /* We have a problem because the soft delete won't work if
++ * the chunk group size > chunks per block.
++ * This can be remedied by using larger "virtual blocks".
++ */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: chunk group too large\n" TENDSTR)));
++
++ return YAFFS_FAIL;
++ }
++
++ /* OK, we've finished verifying the device, lets continue with initialisation */
++
++ /* More device initialisation */
++ dev->garbageCollections = 0;
++ dev->passiveGarbageCollections = 0;
++ dev->currentDirtyChecker = 0;
++ dev->bufferedBlock = -1;
++ dev->doingBufferedBlockRewrite = 0;
++ dev->nDeletedFiles = 0;
++ dev->nBackgroundDeletions = 0;
++ dev->nUnlinkedFiles = 0;
++ dev->eccFixed = 0;
++ dev->eccUnfixed = 0;
++ dev->tagsEccFixed = 0;
++ dev->tagsEccUnfixed = 0;
++ dev->nErasureFailures = 0;
++ dev->nErasedBlocks = 0;
++ dev->isDoingGC = 0;
++ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
++
++ /* Initialise temporary buffers and caches. */
++ if (!yaffs_InitialiseTempBuffers(dev))
++ init_failed = 1;
++
++ dev->srCache = NULL;
++ dev->gcCleanupList = NULL;
++
++
++ if (!init_failed &&
++ dev->nShortOpCaches > 0) {
++ int i;
++ void *buf;
++ int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
++
++ if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
++ dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
++
++ dev->srCache = YMALLOC(srCacheBytes);
++
++ buf = (__u8 *) dev->srCache;
++
++ if (dev->srCache)
++ memset(dev->srCache, 0, srCacheBytes);
++
++ for (i = 0; i < dev->nShortOpCaches && buf; i++) {
++ dev->srCache[i].object = NULL;
++ dev->srCache[i].lastUse = 0;
++ dev->srCache[i].dirty = 0;
++ dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
++ }
++ if (!buf)
++ init_failed = 1;
++
++ dev->srLastUse = 0;
++ }
++
++ dev->cacheHits = 0;
++
++ if (!init_failed) {
++ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
++ if (!dev->gcCleanupList)
++ init_failed = 1;
++ }
++
++ if (dev->isYaffs2)
++ dev->useHeaderFileSize = 1;
++
++ if (!init_failed && !yaffs_InitialiseBlocks(dev))
++ init_failed = 1;
++
++ yaffs_InitialiseTnodes(dev);
++ yaffs_InitialiseObjects(dev);
++
++ if (!init_failed && !yaffs_CreateInitialDirectories(dev))
++ init_failed = 1;
++
++
++ if (!init_failed) {
++ /* Now scan the flash. */
++ if (dev->isYaffs2) {
++ if (yaffs_CheckpointRestore(dev)) {
++ yaffs_CheckObjectDetailsLoaded(dev->rootDir);
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
++ } else {
++
++ /* Clean up the mess caused by an aborted checkpoint load
++ * and scan backwards.
++ */
++ yaffs_DeinitialiseBlocks(dev);
++ yaffs_DeinitialiseTnodes(dev);
++ yaffs_DeinitialiseObjects(dev);
++
++
++ dev->nErasedBlocks = 0;
++ dev->nFreeChunks = 0;
++ dev->allocationBlock = -1;
++ dev->allocationPage = -1;
++ dev->nDeletedFiles = 0;
++ dev->nUnlinkedFiles = 0;
++ dev->nBackgroundDeletions = 0;
++ dev->oldestDirtySequence = 0;
++
++ if (!init_failed && !yaffs_InitialiseBlocks(dev))
++ init_failed = 1;
++
++ yaffs_InitialiseTnodes(dev);
++ yaffs_InitialiseObjects(dev);
++
++ if (!init_failed && !yaffs_CreateInitialDirectories(dev))
++ init_failed = 1;
++
++ if (!init_failed && !yaffs_ScanBackwards(dev))
++ init_failed = 1;
++ }
++ } else if (!yaffs_Scan(dev))
++ init_failed = 1;
++
++ yaffs_StripDeletedObjects(dev);
++ }
++
++ if (init_failed) {
++ /* Clean up the mess */
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
++
++ yaffs_Deinitialise(dev);
++ return YAFFS_FAIL;
++ }
++
++ /* Zero out stats */
++ dev->nPageReads = 0;
++ dev->nPageWrites = 0;
++ dev->nBlockErasures = 0;
++ dev->nGCCopies = 0;
++ dev->nRetriedWrites = 0;
++
++ dev->nRetiredBlocks = 0;
++
++ yaffs_VerifyFreeChunks(dev);
++ yaffs_VerifyBlocks(dev);
++
++
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
++ return YAFFS_OK;
++
++}
++
++void yaffs_Deinitialise(yaffs_Device *dev)
++{
++ if (dev->isMounted) {
++ int i;
++
++ yaffs_DeinitialiseBlocks(dev);
++ yaffs_DeinitialiseTnodes(dev);
++ yaffs_DeinitialiseObjects(dev);
++ if (dev->nShortOpCaches > 0 &&
++ dev->srCache) {
++
++ for (i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].data)
++ YFREE(dev->srCache[i].data);
++ dev->srCache[i].data = NULL;
++ }
++
++ YFREE(dev->srCache);
++ dev->srCache = NULL;
++ }
++
++ YFREE(dev->gcCleanupList);
++
++ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ YFREE(dev->tempBuffer[i].buffer);
++
++ dev->isMounted = 0;
++
++ if (dev->deinitialiseNAND)
++ dev->deinitialiseNAND(dev);
++ }
++}
++
++static int yaffs_CountFreeChunks(yaffs_Device *dev)
++{
++ int nFree;
++ int b;
++
++ yaffs_BlockInfo *blk;
++
++ for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
++ b++) {
++ blk = yaffs_GetBlockInfo(dev, b);
++
++ switch (blk->blockState) {
++ case YAFFS_BLOCK_STATE_EMPTY:
++ case YAFFS_BLOCK_STATE_ALLOCATING:
++ case YAFFS_BLOCK_STATE_COLLECTING:
++ case YAFFS_BLOCK_STATE_FULL:
++ nFree +=
++ (dev->nChunksPerBlock - blk->pagesInUse +
++ blk->softDeletions);
++ break;
++ default:
++ break;
++ }
++ }
++
++ return nFree;
++}
++
++int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
++{
++ /* This is what we report to the outside world */
++
++ int nFree;
++ int nDirtyCacheChunks;
++ int blocksForCheckpoint;
++ int i;
++
++#if 1
++ nFree = dev->nFreeChunks;
++#else
++ nFree = yaffs_CountFreeChunks(dev);
++#endif
++
++ nFree += dev->nDeletedFiles;
++
++ /* Now count the number of dirty chunks in the cache and subtract those */
++
++ for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
++ if (dev->srCache[i].dirty)
++ nDirtyCacheChunks++;
++ }
++
++ nFree -= nDirtyCacheChunks;
++
++ nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
++
++ /* Now we figure out how much to reserve for the checkpoint and report that... */
++ blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
++ if (blocksForCheckpoint < 0)
++ blocksForCheckpoint = 0;
++
++ nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
++
++ if (nFree < 0)
++ nFree = 0;
++
++ return nFree;
++
++}
++
++static int yaffs_freeVerificationFailures;
++
++static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
++{
++ int counted;
++ int difference;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ counted = yaffs_CountFreeChunks(dev);
++
++ difference = dev->nFreeChunks - counted;
++
++ if (difference) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
++ dev->nFreeChunks, counted, difference));
++ yaffs_freeVerificationFailures++;
++ }
++}
++
++/*---------------------------------------- YAFFS test code ----------------------*/
++
++#define yaffs_CheckStruct(structure, syze, name) \
++ do { \
++ if (sizeof(structure) != syze) { \
++ T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
++ name, syze, sizeof(structure))); \
++ return YAFFS_FAIL; \
++ } \
++ } while (0)
++
++static int yaffs_CheckStructures(void)
++{
++/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
++/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
++/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
++#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
++#endif
++#ifndef CONFIG_YAFFS_WINCE
++ yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
++#endif
++ return YAFFS_OK;
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_guts.h linux-2.6.32/fs/yaffs2/yaffs_guts.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_guts.h 2010-01-30 20:35:01.441990129 +0100
+@@ -0,0 +1,904 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_GUTS_H__
++#define __YAFFS_GUTS_H__
++
++#include "devextras.h"
++#include "yportenv.h"
++
++#define YAFFS_OK 1
++#define YAFFS_FAIL 0
++
++/* Give us a Y=0x59,
++ * Give us an A=0x41,
++ * Give us an FF=0xFF
++ * Give us an S=0x53
++ * And what have we got...
++ */
++#define YAFFS_MAGIC 0x5941FF53
++
++#define YAFFS_NTNODES_LEVEL0 16
++#define YAFFS_TNODES_LEVEL0_BITS 4
++#define YAFFS_TNODES_LEVEL0_MASK 0xf
++
++#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
++#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
++#define YAFFS_TNODES_INTERNAL_MASK 0x7
++#define YAFFS_TNODES_MAX_LEVEL 6
++
++#ifndef CONFIG_YAFFS_NO_YAFFS1
++#define YAFFS_BYTES_PER_SPARE 16
++#define YAFFS_BYTES_PER_CHUNK 512
++#define YAFFS_CHUNK_SIZE_SHIFT 9
++#define YAFFS_CHUNKS_PER_BLOCK 32
++#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
++#endif
++
++#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
++#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
++
++#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
++
++#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
++
++#define YAFFS_ALLOCATION_NOBJECTS 100
++#define YAFFS_ALLOCATION_NTNODES 100
++#define YAFFS_ALLOCATION_NLINKS 100
++
++#define YAFFS_NOBJECT_BUCKETS 256
++
++
++#define YAFFS_OBJECT_SPACE 0x40000
++
++#define YAFFS_CHECKPOINT_VERSION 3
++
++#ifdef CONFIG_YAFFS_UNICODE
++#define YAFFS_MAX_NAME_LENGTH 127
++#define YAFFS_MAX_ALIAS_LENGTH 79
++#else
++#define YAFFS_MAX_NAME_LENGTH 255
++#define YAFFS_MAX_ALIAS_LENGTH 159
++#endif
++
++#define YAFFS_SHORT_NAME_LENGTH 15
++
++/* Some special object ids for pseudo objects */
++#define YAFFS_OBJECTID_ROOT 1
++#define YAFFS_OBJECTID_LOSTNFOUND 2
++#define YAFFS_OBJECTID_UNLINKED 3
++#define YAFFS_OBJECTID_DELETED 4
++
++/* Sseudo object ids for checkpointing */
++#define YAFFS_OBJECTID_SB_HEADER 0x10
++#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
++#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
++
++/* */
++
++#define YAFFS_MAX_SHORT_OP_CACHES 20
++
++#define YAFFS_N_TEMP_BUFFERS 6
++
++/* We limit the number attempts at sucessfully saving a chunk of data.
++ * Small-page devices have 32 pages per block; large-page devices have 64.
++ * Default to something in the order of 5 to 10 blocks worth of chunks.
++ */
++#define YAFFS_WR_ATTEMPTS (5*64)
++
++/* Sequence numbers are used in YAFFS2 to determine block allocation order.
++ * The range is limited slightly to help distinguish bad numbers from good.
++ * This also allows us to perhaps in the future use special numbers for
++ * special purposes.
++ * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
++ * and is a larger number than the lifetime of a 2GB device.
++ */
++#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
++#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
++
++/* Special sequence number for bad block that failed to be marked bad */
++#define YAFFS_SEQUENCE_BAD_BLOCK 0xFFFF0000
++
++/* ChunkCache is used for short read/write operations.*/
++typedef struct {
++ struct yaffs_ObjectStruct *object;
++ int chunkId;
++ int lastUse;
++ int dirty;
++ int nBytes; /* Only valid if the cache is dirty */
++ int locked; /* Can't push out or flush while locked. */
++#ifdef CONFIG_YAFFS_YAFFS2
++ __u8 *data;
++#else
++ __u8 data[YAFFS_BYTES_PER_CHUNK];
++#endif
++} yaffs_ChunkCache;
++
++
++
++/* Tags structures in RAM
++ * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
++ * the structure size will get blown out.
++ */
++
++#ifndef CONFIG_YAFFS_NO_YAFFS1
++typedef struct {
++ unsigned chunkId:20;
++ unsigned serialNumber:2;
++ unsigned byteCountLSB:10;
++ unsigned objectId:18;
++ unsigned ecc:12;
++ unsigned byteCountMSB:2;
++} yaffs_Tags;
++
++typedef union {
++ yaffs_Tags asTags;
++ __u8 asBytes[8];
++} yaffs_TagsUnion;
++
++#endif
++
++/* Stuff used for extended tags in YAFFS2 */
++
++typedef enum {
++ YAFFS_ECC_RESULT_UNKNOWN,
++ YAFFS_ECC_RESULT_NO_ERROR,
++ YAFFS_ECC_RESULT_FIXED,
++ YAFFS_ECC_RESULT_UNFIXED
++} yaffs_ECCResult;
++
++typedef enum {
++ YAFFS_OBJECT_TYPE_UNKNOWN,
++ YAFFS_OBJECT_TYPE_FILE,
++ YAFFS_OBJECT_TYPE_SYMLINK,
++ YAFFS_OBJECT_TYPE_DIRECTORY,
++ YAFFS_OBJECT_TYPE_HARDLINK,
++ YAFFS_OBJECT_TYPE_SPECIAL
++} yaffs_ObjectType;
++
++#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
++
++typedef struct {
++
++ unsigned validMarker0;
++ unsigned chunkUsed; /* Status of the chunk: used or unused */
++ unsigned objectId; /* If 0 then this is not part of an object (unused) */
++ unsigned chunkId; /* If 0 then this is a header, else a data chunk */
++ unsigned byteCount; /* Only valid for data chunks */
++
++ /* The following stuff only has meaning when we read */
++ yaffs_ECCResult eccResult;
++ unsigned blockBad;
++
++ /* YAFFS 1 stuff */
++ unsigned chunkDeleted; /* The chunk is marked deleted */
++ unsigned serialNumber; /* Yaffs1 2-bit serial number */
++
++ /* YAFFS2 stuff */
++ unsigned sequenceNumber; /* The sequence number of this block */
++
++ /* Extra info if this is an object header (YAFFS2 only) */
++
++ unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */
++ unsigned extraParentObjectId; /* The parent object */
++ unsigned extraIsShrinkHeader; /* Is it a shrink header? */
++ unsigned extraShadows; /* Does this shadow another object? */
++
++ yaffs_ObjectType extraObjectType; /* What object type? */
++
++ unsigned extraFileLength; /* Length if it is a file */
++ unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */
++
++ unsigned validMarker1;
++
++} yaffs_ExtendedTags;
++
++/* Spare structure for YAFFS1 */
++typedef struct {
++ __u8 tagByte0;
++ __u8 tagByte1;
++ __u8 tagByte2;
++ __u8 tagByte3;
++ __u8 pageStatus; /* set to 0 to delete the chunk */
++ __u8 blockStatus;
++ __u8 tagByte4;
++ __u8 tagByte5;
++ __u8 ecc1[3];
++ __u8 tagByte6;
++ __u8 tagByte7;
++ __u8 ecc2[3];
++} yaffs_Spare;
++
++/*Special structure for passing through to mtd */
++struct yaffs_NANDSpare {
++ yaffs_Spare spare;
++ int eccres1;
++ int eccres2;
++};
++
++/* Block data in RAM */
++
++typedef enum {
++ YAFFS_BLOCK_STATE_UNKNOWN = 0,
++
++ YAFFS_BLOCK_STATE_SCANNING,
++ YAFFS_BLOCK_STATE_NEEDS_SCANNING,
++ /* The block might have something on it (ie it is allocating or full, perhaps empty)
++ * but it needs to be scanned to determine its true state.
++ * This state is only valid during yaffs_Scan.
++ * NB We tolerate empty because the pre-scanner might be incapable of deciding
++ * However, if this state is returned on a YAFFS2 device, then we expect a sequence number
++ */
++
++ YAFFS_BLOCK_STATE_EMPTY,
++ /* This block is empty */
++
++ YAFFS_BLOCK_STATE_ALLOCATING,
++ /* This block is partially allocated.
++ * At least one page holds valid data.
++ * This is the one currently being used for page
++ * allocation. Should never be more than one of these
++ */
++
++ YAFFS_BLOCK_STATE_FULL,
++ /* All the pages in this block have been allocated.
++ */
++
++ YAFFS_BLOCK_STATE_DIRTY,
++ /* All pages have been allocated and deleted.
++ * Erase me, reuse me.
++ */
++
++ YAFFS_BLOCK_STATE_CHECKPOINT,
++ /* This block is assigned to holding checkpoint data.
++ */
++
++ YAFFS_BLOCK_STATE_COLLECTING,
++ /* This block is being garbage collected */
++
++ YAFFS_BLOCK_STATE_DEAD
++ /* This block has failed and is not in use */
++} yaffs_BlockState;
++
++#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
++
++
++typedef struct {
++
++ int softDeletions:10; /* number of soft deleted pages */
++ int pagesInUse:10; /* number of pages in use */
++ unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
++ __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
++ /* and retire the block. */
++ __u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */
++ __u32 gcPrioritise:1; /* An ECC check or blank check has failed on this block.
++ It should be prioritised for GC */
++ __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
++
++#ifdef CONFIG_YAFFS_YAFFS2
++ __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
++ __u32 sequenceNumber; /* block sequence number for yaffs2 */
++#endif
++
++} yaffs_BlockInfo;
++
++/* -------------------------- Object structure -------------------------------*/
++/* This is the object structure as stored on NAND */
++
++typedef struct {
++ yaffs_ObjectType type;
++
++ /* Apply to everything */
++ int parentObjectId;
++ __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
++ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
++
++ /* The following apply to directories, files, symlinks - not hard links */
++ __u32 yst_mode; /* protection */
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 notForWinCE[5];
++#else
++ __u32 yst_uid;
++ __u32 yst_gid;
++ __u32 yst_atime;
++ __u32 yst_mtime;
++ __u32 yst_ctime;
++#endif
++
++ /* File size applies to files only */
++ int fileSize;
++
++ /* Equivalent object id applies to hard links only. */
++ int equivalentObjectId;
++
++ /* Alias is for symlinks only. */
++ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
++
++ __u32 yst_rdev; /* device stuff for block and char devices (major/min) */
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 win_ctime[2];
++ __u32 win_atime[2];
++ __u32 win_mtime[2];
++#else
++ __u32 roomToGrow[6];
++
++#endif
++ __u32 inbandShadowsObject;
++ __u32 inbandIsShrink;
++
++ __u32 reservedSpace[2];
++ int shadowsObject; /* This object header shadows the specified object if > 0 */
++
++ /* isShrink applies to object headers written when we shrink the file (ie resize) */
++ __u32 isShrink;
++
++} yaffs_ObjectHeader;
++
++/*--------------------------- Tnode -------------------------- */
++
++union yaffs_Tnode_union {
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
++#else
++ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
++#endif
++/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
++
++};
++
++typedef union yaffs_Tnode_union yaffs_Tnode;
++
++struct yaffs_TnodeList_struct {
++ struct yaffs_TnodeList_struct *next;
++ yaffs_Tnode *tnodes;
++};
++
++typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
++
++/*------------------------ Object -----------------------------*/
++/* An object can be one of:
++ * - a directory (no data, has children links
++ * - a regular file (data.... not prunes :->).
++ * - a symlink [symbolic link] (the alias).
++ * - a hard link
++ */
++
++typedef struct {
++ __u32 fileSize;
++ __u32 scannedFileSize;
++ __u32 shrinkSize;
++ int topLevel;
++ yaffs_Tnode *top;
++} yaffs_FileStructure;
++
++typedef struct {
++ struct ylist_head children; /* list of child links */
++} yaffs_DirectoryStructure;
++
++typedef struct {
++ YCHAR *alias;
++} yaffs_SymLinkStructure;
++
++typedef struct {
++ struct yaffs_ObjectStruct *equivalentObject;
++ __u32 equivalentObjectId;
++} yaffs_HardLinkStructure;
++
++typedef union {
++ yaffs_FileStructure fileVariant;
++ yaffs_DirectoryStructure directoryVariant;
++ yaffs_SymLinkStructure symLinkVariant;
++ yaffs_HardLinkStructure hardLinkVariant;
++} yaffs_ObjectVariant;
++
++struct yaffs_ObjectStruct {
++ __u8 deleted:1; /* This should only apply to unlinked files. */
++ __u8 softDeleted:1; /* it has also been soft deleted */
++ __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/
++ __u8 fake:1; /* A fake object has no presence on NAND. */
++ __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */
++ __u8 unlinkAllowed:1;
++ __u8 dirty:1; /* the object needs to be written to flash */
++ __u8 valid:1; /* When the file system is being loaded up, this
++ * object might be created before the data
++ * is available (ie. file data records appear before the header).
++ */
++ __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */
++
++ __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is
++ * still in the inode cache. Free of object is defered.
++ * until the inode is released.
++ */
++ __u8 beingCreated:1; /* This object is still being created so skip some checks. */
++
++ __u8 serial; /* serial number of chunk in NAND. Cached here */
++ __u16 sum; /* sum of the name to speed searching */
++
++ struct yaffs_DeviceStruct *myDev; /* The device I'm on */
++
++ struct ylist_head hashLink; /* list of objects in this hash bucket */
++
++ struct ylist_head hardLinks; /* all the equivalent hard linked objects */
++
++ /* directory structure stuff */
++ /* also used for linking up the free list */
++ struct yaffs_ObjectStruct *parent;
++ struct ylist_head siblings;
++
++ /* Where's my object header in NAND? */
++ int hdrChunk;
++
++ int nDataChunks; /* Number of data chunks attached to the file. */
++
++ __u32 objectId; /* the object id value */
++
++ __u32 yst_mode;
++
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
++#endif
++
++#ifndef __KERNEL__
++ __u32 inUse;
++#endif
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 win_ctime[2];
++ __u32 win_mtime[2];
++ __u32 win_atime[2];
++#else
++ __u32 yst_uid;
++ __u32 yst_gid;
++ __u32 yst_atime;
++ __u32 yst_mtime;
++ __u32 yst_ctime;
++#endif
++
++ __u32 yst_rdev;
++
++#ifdef __KERNEL__
++ struct inode *myInode;
++
++#endif
++
++ yaffs_ObjectType variantType;
++
++ yaffs_ObjectVariant variant;
++
++};
++
++typedef struct yaffs_ObjectStruct yaffs_Object;
++
++struct yaffs_ObjectList_struct {
++ yaffs_Object *objects;
++ struct yaffs_ObjectList_struct *next;
++};
++
++typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
++
++typedef struct {
++ struct ylist_head list;
++ int count;
++} yaffs_ObjectBucket;
++
++
++/* yaffs_CheckpointObject holds the definition of an object as dumped
++ * by checkpointing.
++ */
++
++typedef struct {
++ int structType;
++ __u32 objectId;
++ __u32 parentId;
++ int hdrChunk;
++ yaffs_ObjectType variantType:3;
++ __u8 deleted:1;
++ __u8 softDeleted:1;
++ __u8 unlinked:1;
++ __u8 fake:1;
++ __u8 renameAllowed:1;
++ __u8 unlinkAllowed:1;
++ __u8 serial;
++
++ int nDataChunks;
++ __u32 fileSizeOrEquivalentObjectId;
++} yaffs_CheckpointObject;
++
++/*--------------------- Temporary buffers ----------------
++ *
++ * These are chunk-sized working buffers. Each device has a few
++ */
++
++typedef struct {
++ __u8 *buffer;
++ int line; /* track from whence this buffer was allocated */
++ int maxLine;
++} yaffs_TempBuffer;
++
++/*----------------- Device ---------------------------------*/
++
++struct yaffs_DeviceStruct {
++ struct ylist_head devList;
++ const char *name;
++
++ /* Entry parameters set up way early. Yaffs sets up the rest.*/
++ int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
++ int nChunksPerBlock; /* does not need to be a power of 2 */
++ int spareBytesPerChunk; /* spare area size */
++ int startBlock; /* Start block we're allowed to use */
++ int endBlock; /* End block we're allowed to use */
++ int nReservedBlocks; /* We want this tuneable so that we can reduce */
++ /* reserved blocks on NOR and RAM. */
++
++
++ /* Stuff used by the shared space checkpointing mechanism */
++ /* If this value is zero, then this mechanism is disabled */
++
++/* int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
++
++
++ int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
++ * the number of short op caches (don't use too many)
++ */
++
++ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
++
++ int useNANDECC; /* Flag to decide whether or not to use NANDECC */
++
++ void *genericDevice; /* Pointer to device context
++ * On an mtd this holds the mtd pointer.
++ */
++ void *superBlock;
++
++ /* NAND access functions (Must be set before calling YAFFS)*/
++
++ int (*writeChunkToNAND) (struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, const __u8 *data,
++ const yaffs_Spare *spare);
++ int (*readChunkFromNAND) (struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, __u8 *data,
++ yaffs_Spare *spare);
++ int (*eraseBlockInNAND) (struct yaffs_DeviceStruct *dev,
++ int blockInNAND);
++ int (*initialiseNAND) (struct yaffs_DeviceStruct *dev);
++ int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev);
++
++#ifdef CONFIG_YAFFS_YAFFS2
++ int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, const __u8 *data,
++ const yaffs_ExtendedTags *tags);
++ int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, __u8 *data,
++ yaffs_ExtendedTags *tags);
++ int (*markNANDBlockBad) (struct yaffs_DeviceStruct *dev, int blockNo);
++ int (*queryNANDBlock) (struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *state, __u32 *sequenceNumber);
++#endif
++
++ int isYaffs2;
++
++ /* The removeObjectCallback function must be supplied by OS flavours that
++ * need it. The Linux kernel does not use this, but yaffs direct does use
++ * it to implement the faster readdir
++ */
++ void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
++
++ /* Callback to mark the superblock dirsty */
++ void (*markSuperBlockDirty)(void *superblock);
++
++ int wideTnodesDisabled; /* Set to disable wide tnodes */
++
++ YCHAR *pathDividers; /* String of legal path dividers */
++
++
++ /* End of stuff that must be set before initialisation. */
++
++ /* Checkpoint control. Can be set before or after initialisation */
++ __u8 skipCheckpointRead;
++ __u8 skipCheckpointWrite;
++
++ /* Runtime parameters. Set up by YAFFS. */
++
++ __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
++ __u16 chunkGroupSize; /* == 2^^chunkGroupBits */
++
++ /* Stuff to support wide tnodes */
++ __u32 tnodeWidth;
++ __u32 tnodeMask;
++
++ /* Stuff for figuring out file offset to chunk conversions */
++ __u32 chunkShift; /* Shift value */
++ __u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */
++ __u32 chunkMask; /* Mask to use for power-of-2 case */
++
++ /* Stuff to handle inband tags */
++ int inbandTags;
++ __u32 totalBytesPerChunk;
++
++#ifdef __KERNEL__
++
++ struct semaphore sem; /* Semaphore for waiting on erasure.*/
++ struct semaphore grossLock; /* Gross locking semaphore */
++ __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
++ * at compile time so we have to allocate it.
++ */
++ void (*putSuperFunc) (struct super_block *sb);
++#endif
++
++ int isMounted;
++
++ int isCheckpointed;
++
++
++ /* Stuff to support block offsetting to support start block zero */
++ int internalStartBlock;
++ int internalEndBlock;
++ int blockOffset;
++ int chunkOffset;
++
++
++ /* Runtime checkpointing stuff */
++ int checkpointPageSequence; /* running sequence number of checkpoint pages */
++ int checkpointByteCount;
++ int checkpointByteOffset;
++ __u8 *checkpointBuffer;
++ int checkpointOpenForWrite;
++ int blocksInCheckpoint;
++ int checkpointCurrentChunk;
++ int checkpointCurrentBlock;
++ int checkpointNextBlock;
++ int *checkpointBlockList;
++ int checkpointMaxBlocks;
++ __u32 checkpointSum;
++ __u32 checkpointXor;
++
++ int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */
++
++ /* Block Info */
++ yaffs_BlockInfo *blockInfo;
++ __u8 *chunkBits; /* bitmap of chunks in use */
++ unsigned blockInfoAlt:1; /* was allocated using alternative strategy */
++ unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */
++ int chunkBitmapStride; /* Number of bytes of chunkBits per block.
++ * Must be consistent with nChunksPerBlock.
++ */
++
++ int nErasedBlocks;
++ int allocationBlock; /* Current block being allocated off */
++ __u32 allocationPage;
++ int allocationBlockFinder; /* Used to search for next allocation block */
++
++ /* Runtime state */
++ int nTnodesCreated;
++ yaffs_Tnode *freeTnodes;
++ int nFreeTnodes;
++ yaffs_TnodeList *allocatedTnodeList;
++
++ int isDoingGC;
++ int gcBlock;
++ int gcChunk;
++
++ int nObjectsCreated;
++ yaffs_Object *freeObjects;
++ int nFreeObjects;
++
++ int nHardLinks;
++
++ yaffs_ObjectList *allocatedObjectList;
++
++ yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
++
++ int nFreeChunks;
++
++ int currentDirtyChecker; /* Used to find current dirtiest block */
++
++ __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
++ int nonAggressiveSkip; /* GC state/mode */
++
++ /* Statistcs */
++ int nPageWrites;
++ int nPageReads;
++ int nBlockErasures;
++ int nErasureFailures;
++ int nGCCopies;
++ int garbageCollections;
++ int passiveGarbageCollections;
++ int nRetriedWrites;
++ int nRetiredBlocks;
++ int eccFixed;
++ int eccUnfixed;
++ int tagsEccFixed;
++ int tagsEccUnfixed;
++ int nDeletions;
++ int nUnmarkedDeletions;
++
++ int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
++
++ /* Special directories */
++ yaffs_Object *rootDir;
++ yaffs_Object *lostNFoundDir;
++
++ /* Buffer areas for storing data to recover from write failures TODO
++ * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
++ * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
++ */
++
++ int bufferedBlock; /* Which block is buffered here? */
++ int doingBufferedBlockRewrite;
++
++ yaffs_ChunkCache *srCache;
++ int srLastUse;
++
++ int cacheHits;
++
++ /* Stuff for background deletion and unlinked files.*/
++ yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
++ yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
++ yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/
++ int nDeletedFiles; /* Count of files awaiting deletion;*/
++ int nUnlinkedFiles; /* Count of unlinked files. */
++ int nBackgroundDeletions; /* Count of background deletions. */
++
++
++ /* Temporary buffer management */
++ yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
++ int maxTemp;
++ int tempInUse;
++ int unmanagedTempAllocations;
++ int unmanagedTempDeallocations;
++
++ /* yaffs2 runtime stuff */
++ unsigned sequenceNumber; /* Sequence number of currently allocating block */
++ unsigned oldestDirtySequence;
++
++};
++
++typedef struct yaffs_DeviceStruct yaffs_Device;
++
++/* The static layout of block usage etc is stored in the super block header */
++typedef struct {
++ int StructType;
++ int version;
++ int checkpointStartBlock;
++ int checkpointEndBlock;
++ int startBlock;
++ int endBlock;
++ int rfu[100];
++} yaffs_SuperBlockHeader;
++
++/* The CheckpointDevice structure holds the device information that changes at runtime and
++ * must be preserved over unmount/mount cycles.
++ */
++typedef struct {
++ int structType;
++ int nErasedBlocks;
++ int allocationBlock; /* Current block being allocated off */
++ __u32 allocationPage;
++ int nFreeChunks;
++
++ int nDeletedFiles; /* Count of files awaiting deletion;*/
++ int nUnlinkedFiles; /* Count of unlinked files. */
++ int nBackgroundDeletions; /* Count of background deletions. */
++
++ /* yaffs2 runtime stuff */
++ unsigned sequenceNumber; /* Sequence number of currently allocating block */
++ unsigned oldestDirtySequence;
++
++} yaffs_CheckpointDevice;
++
++
++typedef struct {
++ int structType;
++ __u32 magic;
++ __u32 version;
++ __u32 head;
++} yaffs_CheckpointValidity;
++
++
++/*----------------------- YAFFS Functions -----------------------*/
++
++int yaffs_GutsInitialise(yaffs_Device *dev);
++void yaffs_Deinitialise(yaffs_Device *dev);
++
++int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev);
++
++int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
++ yaffs_Object *newDir, const YCHAR *newName);
++
++int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name);
++int yaffs_DeleteObject(yaffs_Object *obj);
++
++int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize);
++int yaffs_GetObjectFileLength(yaffs_Object *obj);
++int yaffs_GetObjectInode(yaffs_Object *obj);
++unsigned yaffs_GetObjectType(yaffs_Object *obj);
++int yaffs_GetObjectLinkCount(yaffs_Object *obj);
++
++int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr);
++int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr);
++
++/* File operations */
++int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset,
++ int nBytes);
++int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset,
++ int nBytes, int writeThrough);
++int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize);
++
++yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid);
++int yaffs_FlushFile(yaffs_Object *obj, int updateTime);
++
++/* Flushing and checkpointing */
++void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
++
++int yaffs_CheckpointSave(yaffs_Device *dev);
++int yaffs_CheckpointRestore(yaffs_Device *dev);
++
++/* Directory operations */
++yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid);
++yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir, const YCHAR *name);
++int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
++ int (*fn) (yaffs_Object *));
++
++yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number);
++
++/* Link operations */
++yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
++ yaffs_Object *equivalentObject);
++
++yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj);
++
++/* Symlink operations */
++yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid,
++ const YCHAR *alias);
++YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj);
++
++/* Special inodes (fifos, sockets and devices) */
++yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
++
++/* Special directories */
++yaffs_Object *yaffs_Root(yaffs_Device *dev);
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
++
++#ifdef CONFIG_YAFFS_WINCE
++/* CONFIG_YAFFS_WINCE special stuff */
++void yfsd_WinFileTimeNow(__u32 target[2]);
++#endif
++
++#ifdef __KERNEL__
++
++void yaffs_HandleDeferedFree(yaffs_Object *obj);
++#endif
++
++/* Debug dump */
++int yaffs_DumpObject(yaffs_Object *obj);
++
++void yaffs_GutsTest(yaffs_Device *dev);
++
++/* A few useful functions */
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
++void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn);
++int yaffs_CheckFF(__u8 *buffer, int nBytes);
++void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
++
++__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
++void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffsinterface.h linux-2.6.32/fs/yaffs2/yaffsinterface.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffsinterface.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffsinterface.h 2010-01-30 20:35:01.492020092 +0100
+@@ -0,0 +1,21 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFSINTERFACE_H__
++#define __YAFFSINTERFACE_H__
++
++int yaffs_Initialise(unsigned nBlocks);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif1.c linux-2.6.32/fs/yaffs2/yaffs_mtdif1.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif1.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif1.c 2010-01-30 20:35:01.534033438 +0100
+@@ -0,0 +1,365 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * This module provides the interface between yaffs_nand.c and the
++ * MTD API. This version is used when the MTD interface supports the
++ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
++ * and we have small-page NAND device.
++ *
++ * These functions are invoked via function pointers in yaffs_nand.c.
++ * This replaces functionality provided by functions in yaffs_mtdif.c
++ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
++ * called in yaffs_mtdif.c when the function pointers are NULL.
++ * We assume the MTD layer is performing ECC (useNANDECC is true).
++ */
++
++#include "yportenv.h"
++#include "yaffs_guts.h"
++#include "yaffs_packedtags1.h"
++#include "yaffs_tagscompat.h" /* for yaffs_CalcTagsECC */
++
++#include "linux/kernel.h"
++#include "linux/version.h"
++#include "linux/types.h"
++#include "linux/mtd/mtd.h"
++
++/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++
++const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $";
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++# define YTAG1_SIZE 8
++#else
++# define YTAG1_SIZE 9
++#endif
++
++#if 0
++/* Use the following nand_ecclayout with MTD when using
++ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
++ * If you have existing Yaffs images and the byte order differs from this,
++ * adjust 'oobfree' to match your existing Yaffs data.
++ *
++ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
++ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
++ * the 9th byte.
++ *
++ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
++ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
++ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
++ * byte and B is the small-page bad-block indicator byte.
++ */
++static struct nand_ecclayout nand_oob_16 = {
++ .eccbytes = 6,
++ .eccpos = { 8, 9, 10, 13, 14, 15 },
++ .oobavail = 9,
++ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
++};
++#endif
++
++/* Write a chunk (page) of data to NAND.
++ *
++ * Caller always provides ExtendedTags data which are converted to a more
++ * compact (packed) form for storage in NAND. A mini-ECC runs over the
++ * contents of the tags meta-data; used to valid the tags when read.
++ *
++ * - Pack ExtendedTags to PackedTags1 form
++ * - Compute mini-ECC for PackedTags1
++ * - Write data and packed tags to NAND.
++ *
++ * Note: Due to the use of the PackedTags1 meta-data which does not include
++ * a full sequence number (as found in the larger PackedTags2 form) it is
++ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
++ * discarded and dirty. This is not ideal: newer NAND parts are supposed
++ * to be written just once. When Yaffs performs this operation, this
++ * function is called with a NULL data pointer -- calling MTD write_oob
++ * without data is valid usage (2.6.17).
++ *
++ * Any underlying MTD error results in YAFFS_FAIL.
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags)
++{
++ struct mtd_info *mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++
++ /* we assume that PackedTags1 and yaffs_Tags are compatible */
++ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
++ compile_time_assertion(sizeof(yaffs_Tags) == 8);
++
++ dev->nPageWrites++;
++
++ yaffs_PackTags1(&pt1, etags);
++ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
++
++ /* When deleting a chunk, the upper layer provides only skeletal
++ * etags, one with chunkDeleted set. However, we need to update the
++ * tags, not erase them completely. So we use the NAND write property
++ * that only zeroed-bits stick and set tag bytes to all-ones and
++ * zero just the (not) deleted bit.
++ */
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* clear delete status bit to indicate deleted */
++ pt1.deleted = 0;
++ }
++#else
++ ((__u8 *)&pt1)[8] = 0xff;
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* zero pageStatus byte to indicate deleted */
++ ((__u8 *)&pt1)[8] = 0;
++ }
++#endif
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = (__u8 *)data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++ retval = mtd->write_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "write_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++ return retval ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Return with empty ExtendedTags but add eccResult.
++ */
++static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval)
++{
++ if (etags) {
++ memset(etags, 0, sizeof(*etags));
++ etags->eccResult = eccResult;
++ }
++ return retval;
++}
++
++/* Read a chunk (page) from NAND.
++ *
++ * Caller expects ExtendedTags data to be usable even on error; that is,
++ * all members except eccResult and blockBad are zeroed.
++ *
++ * - Check ECC results for data (if applicable)
++ * - Check for blank/erased block (return empty ExtendedTags if blank)
++ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
++ * - Convert PackedTags1 to ExtendedTags
++ * - Update eccResult and blockBad members to refect state.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
++ int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags)
++{
++ struct mtd_info *mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++ int deleted;
++
++ dev->nPageReads++;
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
++ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
++ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
++ */
++ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
++#endif
++ /* Read page and oob using MTD.
++ * Check status and determine ECC result.
++ */
++ retval = mtd->read_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "read_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++
++ switch (retval) {
++ case 0:
++ /* no error */
++ break;
++
++ case -EUCLEAN:
++ /* MTD's ECC fixed the data */
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ dev->eccFixed++;
++ break;
++
++ case -EBADMSG:
++ /* MTD's ECC could not fix the data */
++ dev->eccUnfixed++;
++ /* fall into... */
++ default:
++ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
++ etags->blockBad = (mtd->block_isbad)(mtd, addr);
++ return YAFFS_FAIL;
++ }
++
++ /* Check for a blank/erased chunk.
++ */
++ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
++ /* when blank, upper layers want eccResult to be <= NO_ERROR */
++ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
++ }
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ /* Read deleted status (bit) then return it to it's non-deleted
++ * state before performing tags mini-ECC check. pt1.deleted is
++ * inverted.
++ */
++ deleted = !pt1.deleted;
++ pt1.deleted = 1;
++#else
++ deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
++#endif
++
++ /* Check the packed tags mini-ECC and correct if necessary/possible.
++ */
++ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
++ switch (retval) {
++ case 0:
++ /* no tags error, use MTD result */
++ break;
++ case 1:
++ /* recovered tags-ECC error */
++ dev->tagsEccFixed++;
++ if (eccres == YAFFS_ECC_RESULT_NO_ERROR)
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ break;
++ default:
++ /* unrecovered tags-ECC error */
++ dev->tagsEccUnfixed++;
++ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
++ }
++
++ /* Unpack the tags to extended form and set ECC result.
++ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
++ */
++ pt1.shouldBeFF = 0xFFFFFFFF;
++ yaffs_UnpackTags1(etags, &pt1);
++ etags->eccResult = eccres;
++
++ /* Set deleted state */
++ etags->chunkDeleted = deleted;
++ return YAFFS_OK;
++}
++
++/* Mark a block bad.
++ *
++ * This is a persistant state.
++ * Use of this function should be rare.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info *mtd = dev->genericDevice;
++ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
++ int retval;
++
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
++
++ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
++ return (retval) ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Check any MTD prerequists.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++static int nandmtd1_TestPrerequists(struct mtd_info *mtd)
++{
++ /* 2.6.18 has mtd->ecclayout->oobavail */
++ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
++ int oobavail = mtd->ecclayout->oobavail;
++
++ if (oobavail < YTAG1_SIZE) {
++ yaffs_trace(YAFFS_TRACE_ERROR,
++ "mtd device has only %d bytes for tags, need %d\n",
++ oobavail, YTAG1_SIZE);
++ return YAFFS_FAIL;
++ }
++ return YAFFS_OK;
++}
++
++/* Query for the current state of a specific block.
++ *
++ * Examine the tags of the first chunk of the block and return the state:
++ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
++ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
++ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
++ *
++ * Always returns YAFFS_OK.
++ */
++int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *pState, __u32 *pSequenceNumber)
++{
++ struct mtd_info *mtd = dev->genericDevice;
++ int chunkNo = blockNo * dev->nChunksPerBlock;
++ loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
++ yaffs_ExtendedTags etags;
++ int state = YAFFS_BLOCK_STATE_DEAD;
++ int seqnum = 0;
++ int retval;
++
++ /* We don't yet have a good place to test for MTD config prerequists.
++ * Do it here as we are called during the initial scan.
++ */
++ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK)
++ return YAFFS_FAIL;
++
++ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
++ etags.blockBad = (mtd->block_isbad)(mtd, addr);
++ if (etags.blockBad) {
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
++ "block %d is marked bad\n", blockNo);
++ state = YAFFS_BLOCK_STATE_DEAD;
++ } else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
++ /* bad tags, need to look more closely */
++ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ } else if (etags.chunkUsed) {
++ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ seqnum = etags.sequenceNumber;
++ } else {
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++
++ *pState = state;
++ *pSequenceNumber = seqnum;
++
++ /* query always succeeds */
++ return YAFFS_OK;
++}
++
++#endif /*MTD_VERSION*/
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif1.h linux-2.6.32/fs/yaffs2/yaffs_mtdif1.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif1.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif1.h 2010-01-30 20:35:01.572068025 +0100
+@@ -0,0 +1,28 @@
++/*
++ * YAFFS: Yet another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_MTDIF1_H__
++#define __YAFFS_MTDIF1_H__
++
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data, const yaffs_ExtendedTags *tags);
++
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++ __u8 *data, yaffs_ExtendedTags *tags);
++
++int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++
++int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *state, __u32 *sequenceNumber);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif2.c linux-2.6.32/fs/yaffs2/yaffs_mtdif2.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif2.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif2.c 2010-01-30 20:35:01.611828597 +0100
+@@ -0,0 +1,246 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/* mtd interface for YAFFS2 */
++
++const char *yaffs_mtdif2_c_version =
++ "$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $";
++
++#include "yportenv.h"
++
++
++#include "yaffs_mtdif2.h"
++
++#include "linux/mtd/mtd.h"
++#include "linux/types.h"
++#include "linux/time.h"
++
++#include "yaffs_packedtags2.h"
++
++/* NB For use with inband tags....
++ * We assume that the data buffer is of size totalBytersPerChunk so that we can also
++ * use it to load the tags.
++ */
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ struct mtd_oob_ops ops;
++#else
++ size_t dummy;
++#endif
++ int retval = 0;
++
++ loff_t addr;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,
++ (TSTR
++ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
++ TENDSTR), chunkInNAND, data, tags));
++
++
++ addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++
++ /* For yaffs2 writing there must be both data and tags.
++ * If we're using inband tags, then the tags are stuffed into
++ * the end of the data buffer.
++ */
++ if (!data || !tags)
++ BUG();
++ else if (dev->inbandTags) {
++ yaffs_PackedTags2TagsPart *pt2tp;
++ pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
++ yaffs_PackTags2TagsPart(pt2tp, tags);
++ } else
++ yaffs_PackTags2(&pt, tags);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
++ ops.len = dev->totalBytesPerChunk;
++ ops.ooboffs = 0;
++ ops.datbuf = (__u8 *)data;
++ ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
++ retval = mtd->write_oob(mtd, addr, &ops);
++
++#else
++ if (!dev->inbandTags) {
++ retval =
++ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, (__u8 *) &pt, NULL);
++ } else {
++ retval =
++ mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
++ data);
++ }
++#endif
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++ __u8 *data, yaffs_ExtendedTags *tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ struct mtd_oob_ops ops;
++#endif
++ size_t dummy;
++ int retval = 0;
++ int localData = 0;
++
++ loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,
++ (TSTR
++ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
++ TENDSTR), chunkInNAND, data, tags));
++
++ if (dev->inbandTags) {
++
++ if (!data) {
++ localData = 1;
++ data = yaffs_GetTempBuffer(dev, __LINE__);
++ }
++
++
++ }
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ if (dev->inbandTags || (data && !tags))
++ retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
++ &dummy, data);
++ else if (tags) {
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = sizeof(pt);
++ ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
++ ops.ooboffs = 0;
++ ops.datbuf = data;
++ ops.oobbuf = dev->spareBuffer;
++ retval = mtd->read_oob(mtd, addr, &ops);
++ }
++#else
++ if (!dev->inbandTags && data && tags) {
++
++ retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, dev->spareBuffer,
++ NULL);
++ } else {
++ if (data)
++ retval =
++ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++ data);
++ if (!dev->inbandTags && tags)
++ retval =
++ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
++ dev->spareBuffer);
++ }
++#endif
++
++
++ if (dev->inbandTags) {
++ if (tags) {
++ yaffs_PackedTags2TagsPart *pt2tp;
++ pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
++ yaffs_UnpackTags2TagsPart(tags, pt2tp);
++ }
++ } else {
++ if (tags) {
++ memcpy(&pt, dev->spareBuffer, sizeof(pt));
++ yaffs_UnpackTags2(tags, &pt);
++ }
++ }
++
++ if (localData)
++ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++
++ if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
++ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ int retval;
++ T(YAFFS_TRACE_MTD,
++ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
++
++ retval =
++ mtd->block_markbad(mtd,
++ blockNo * dev->nChunksPerBlock *
++ dev->totalBytesPerChunk);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++
++}
++
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *state, __u32 *sequenceNumber)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ int retval;
++
++ T(YAFFS_TRACE_MTD,
++ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
++ retval =
++ mtd->block_isbad(mtd,
++ blockNo * dev->nChunksPerBlock *
++ dev->totalBytesPerChunk);
++
++ if (retval) {
++ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
++
++ *state = YAFFS_BLOCK_STATE_DEAD;
++ *sequenceNumber = 0;
++ } else {
++ yaffs_ExtendedTags t;
++ nandmtd2_ReadChunkWithTagsFromNAND(dev,
++ blockNo *
++ dev->nChunksPerBlock, NULL,
++ &t);
++
++ if (t.chunkUsed) {
++ *sequenceNumber = t.sequenceNumber;
++ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ } else {
++ *sequenceNumber = 0;
++ *state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++ }
++ T(YAFFS_TRACE_MTD,
++ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
++ *state));
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif2.h linux-2.6.32/fs/yaffs2/yaffs_mtdif2.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif2.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif2.h 2010-01-30 20:35:01.663084824 +0100
+@@ -0,0 +1,29 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_MTDIF2_H__
++#define __YAFFS_MTDIF2_H__
++
++#include "yaffs_guts.h"
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags);
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++ __u8 *data, yaffs_ExtendedTags *tags);
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *state, __u32 *sequenceNumber);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif.c linux-2.6.32/fs/yaffs2/yaffs_mtdif.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif.c 2010-01-30 20:35:01.701828807 +0100
+@@ -0,0 +1,241 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++const char *yaffs_mtdif_c_version =
++ "$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $";
++
++#include "yportenv.h"
++
++
++#include "yaffs_mtdif.h"
++
++#include "linux/mtd/mtd.h"
++#include "linux/types.h"
++#include "linux/time.h"
++#include "linux/mtd/nand.h"
++
++#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
++static struct nand_oobinfo yaffs_oobinfo = {
++ .useecc = 1,
++ .eccbytes = 6,
++ .eccpos = {8, 9, 10, 13, 14, 15}
++};
++
++static struct nand_oobinfo yaffs_noeccinfo = {
++ .useecc = 0,
++};
++#endif
++
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
++{
++ oob[0] = spare->tagByte0;
++ oob[1] = spare->tagByte1;
++ oob[2] = spare->tagByte2;
++ oob[3] = spare->tagByte3;
++ oob[4] = spare->tagByte4;
++ oob[5] = spare->tagByte5 & 0x3f;
++ oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80;
++ oob[5] |= spare->pageStatus == 0 ? 0 : 0x40;
++ oob[6] = spare->tagByte6;
++ oob[7] = spare->tagByte7;
++}
++
++static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
++{
++ struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
++ spare->tagByte0 = oob[0];
++ spare->tagByte1 = oob[1];
++ spare->tagByte2 = oob[2];
++ spare->tagByte3 = oob[3];
++ spare->tagByte4 = oob[4];
++ spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
++ spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
++ spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
++ spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
++ spare->tagByte6 = oob[6];
++ spare->tagByte7 = oob[7];
++ spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
++
++ nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
++}
++#endif
++
++int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data, const yaffs_Spare *spare)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ struct mtd_oob_ops ops;
++#endif
++ size_t dummy;
++ int retval = 0;
++
++ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ __u8 spareAsBytes[8]; /* OOB */
++
++ if (data && !spare)
++ retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data);
++ else if (spare) {
++ if (dev->useNANDECC) {
++ translate_spare2oob(spare, spareAsBytes);
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = 8; /* temp hack */
++ } else {
++ ops.mode = MTD_OOB_RAW;
++ ops.ooblen = YAFFS_BYTES_PER_SPARE;
++ }
++ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
++ ops.datbuf = (u8 *)data;
++ ops.ooboffs = 0;
++ ops.oobbuf = spareAsBytes;
++ retval = mtd->write_oob(mtd, addr, &ops);
++ }
++#else
++ __u8 *spareAsBytes = (__u8 *) spare;
++
++ if (data && spare) {
++ if (dev->useNANDECC)
++ retval =
++ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, spareAsBytes,
++ &yaffs_oobinfo);
++ else
++ retval =
++ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, spareAsBytes,
++ &yaffs_noeccinfo);
++ } else {
++ if (data)
++ retval =
++ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++ data);
++ if (spare)
++ retval =
++ mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
++ &dummy, spareAsBytes);
++ }
++#endif
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
++ yaffs_Spare *spare)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ struct mtd_oob_ops ops;
++#endif
++ size_t dummy;
++ int retval = 0;
++
++ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
++#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
++ __u8 spareAsBytes[8]; /* OOB */
++
++ if (data && !spare)
++ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data);
++ else if (spare) {
++ if (dev->useNANDECC) {
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = 8; /* temp hack */
++ } else {
++ ops.mode = MTD_OOB_RAW;
++ ops.ooblen = YAFFS_BYTES_PER_SPARE;
++ }
++ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
++ ops.datbuf = data;
++ ops.ooboffs = 0;
++ ops.oobbuf = spareAsBytes;
++ retval = mtd->read_oob(mtd, addr, &ops);
++ if (dev->useNANDECC)
++ translate_oob2spare(spare, spareAsBytes);
++ }
++#else
++ __u8 *spareAsBytes = (__u8 *) spare;
++
++ if (data && spare) {
++ if (dev->useNANDECC) {
++ /* Careful, this call adds 2 ints */
++ /* to the end of the spare data. Calling function */
++ /* should allocate enough memory for spare, */
++ /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
++ retval =
++ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, spareAsBytes,
++ &yaffs_oobinfo);
++ } else {
++ retval =
++ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, spareAsBytes,
++ &yaffs_noeccinfo);
++ }
++ } else {
++ if (data)
++ retval =
++ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++ data);
++ if (spare)
++ retval =
++ mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
++ &dummy, spareAsBytes);
++ }
++#endif
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ __u32 addr =
++ ((loff_t) blockNumber) * dev->nDataBytesPerChunk
++ * dev->nChunksPerBlock;
++ struct erase_info ei;
++ int retval = 0;
++
++ ei.mtd = mtd;
++ ei.addr = addr;
++ ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
++ ei.time = 1000;
++ ei.retries = 2;
++ ei.callback = NULL;
++ ei.priv = (u_long) dev;
++
++ /* Todo finish off the ei if required */
++
++ sema_init(&dev->sem, 0);
++
++ retval = mtd->erase(mtd, &ei);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_InitialiseNAND(yaffs_Device *dev)
++{
++ return YAFFS_OK;
++}
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif.h linux-2.6.32/fs/yaffs2/yaffs_mtdif.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_mtdif.h 2010-01-30 20:35:01.733074983 +0100
+@@ -0,0 +1,32 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_MTDIF_H__
++#define __YAFFS_MTDIF_H__
++
++#include "yaffs_guts.h"
++
++#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
++extern struct nand_oobinfo yaffs_oobinfo;
++extern struct nand_oobinfo yaffs_noeccinfo;
++#endif
++
++int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data, const yaffs_Spare *spare);
++int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
++ yaffs_Spare *spare);
++int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
++int nandmtd_InitialiseNAND(yaffs_Device *dev);
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_nand.c linux-2.6.32/fs/yaffs2/yaffs_nand.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_nand.c 2010-01-30 20:35:01.771938289 +0100
+@@ -0,0 +1,135 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++const char *yaffs_nand_c_version =
++ "$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $";
++
++#include "yaffs_nand.h"
++#include "yaffs_tagscompat.h"
++#include "yaffs_tagsvalidity.h"
++
++#include "yaffs_getblockinfo.h"
++
++int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++ __u8 *buffer,
++ yaffs_ExtendedTags *tags)
++{
++ int result;
++ yaffs_ExtendedTags localTags;
++
++ int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
++
++ /* If there are no tags provided, use local tags to get prioritised gc working */
++ if (!tags)
++ tags = &localTags;
++
++ if (dev->readChunkWithTagsFromNAND)
++ result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
++ tags);
++ else
++ result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
++ realignedChunkInNAND,
++ buffer,
++ tags);
++ if (tags &&
++ tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
++
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
++ yaffs_HandleChunkError(dev, bi);
++ }
++
++ return result;
++}
++
++int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *buffer,
++ yaffs_ExtendedTags *tags)
++{
++ chunkInNAND -= dev->chunkOffset;
++
++
++ if (tags) {
++ tags->sequenceNumber = dev->sequenceNumber;
++ tags->chunkUsed = 1;
++ if (!yaffs_ValidateTags(tags)) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("Writing uninitialised tags" TENDSTR)));
++ YBUG();
++ }
++ T(YAFFS_TRACE_WRITE,
++ (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
++ tags->objectId, tags->chunkId));
++ } else {
++ T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
++ YBUG();
++ }
++
++ if (dev->writeChunkWithTagsToNAND)
++ return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
++ tags);
++ else
++ return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
++ chunkInNAND,
++ buffer,
++ tags);
++}
++
++int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
++{
++ blockNo -= dev->blockOffset;
++
++;
++ if (dev->markNANDBlockBad)
++ return dev->markNANDBlockBad(dev, blockNo);
++ else
++ return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
++}
++
++int yaffs_QueryInitialBlockState(yaffs_Device *dev,
++ int blockNo,
++ yaffs_BlockState *state,
++ __u32 *sequenceNumber)
++{
++ blockNo -= dev->blockOffset;
++
++ if (dev->queryNANDBlock)
++ return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
++ else
++ return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
++ state,
++ sequenceNumber);
++}
++
++
++int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
++ int blockInNAND)
++{
++ int result;
++
++ blockInNAND -= dev->blockOffset;
++
++
++ dev->nBlockErasures++;
++ result = dev->eraseBlockInNAND(dev, blockInNAND);
++
++ return result;
++}
++
++int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
++{
++ return dev->initialiseNAND(dev);
++}
++
++
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.32/fs/yaffs2/yaffs_nandemul2k.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_nandemul2k.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_nandemul2k.h 2010-01-30 20:35:01.811826092 +0100
+@@ -0,0 +1,39 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/* Interface to emulated NAND functions (2k page size) */
++
++#ifndef __YAFFS_NANDEMUL2K_H__
++#define __YAFFS_NANDEMUL2K_H__
++
++#include "yaffs_guts.h"
++
++int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, const __u8 *data,
++ const yaffs_ExtendedTags *tags);
++int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, __u8 *data,
++ yaffs_ExtendedTags *tags);
++int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState *state, __u32 *sequenceNumber);
++int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
++ int blockInNAND);
++int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++int nandemul2k_GetBytesPerChunk(void);
++int nandemul2k_GetChunksPerBlock(void);
++int nandemul2k_GetNumberOfBlocks(void);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_nand.h linux-2.6.32/fs/yaffs2/yaffs_nand.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_nand.h 2010-01-30 20:35:01.851862979 +0100
+@@ -0,0 +1,44 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_NAND_H__
++#define __YAFFS_NAND_H__
++#include "yaffs_guts.h"
++
++
++
++int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++ __u8 *buffer,
++ yaffs_ExtendedTags *tags);
++
++int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *buffer,
++ yaffs_ExtendedTags *tags);
++
++int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
++
++int yaffs_QueryInitialBlockState(yaffs_Device *dev,
++ int blockNo,
++ yaffs_BlockState *state,
++ unsigned *sequenceNumber);
++
++int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
++ int blockInNAND);
++
++int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++
++#endif
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags1.c linux-2.6.32/fs/yaffs2/yaffs_packedtags1.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_packedtags1.c 2010-01-30 20:35:01.902201298 +0100
+@@ -0,0 +1,50 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_packedtags1.h"
++#include "yportenv.h"
++
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t)
++{
++ pt->chunkId = t->chunkId;
++ pt->serialNumber = t->serialNumber;
++ pt->byteCount = t->byteCount;
++ pt->objectId = t->objectId;
++ pt->ecc = 0;
++ pt->deleted = (t->chunkDeleted) ? 0 : 1;
++ pt->unusedStuff = 0;
++ pt->shouldBeFF = 0xFFFFFFFF;
++
++}
++
++void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt)
++{
++ static const __u8 allFF[] =
++ { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
++0xff };
++
++ if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
++ t->blockBad = 0;
++ if (pt->shouldBeFF != 0xFFFFFFFF)
++ t->blockBad = 1;
++ t->chunkUsed = 1;
++ t->objectId = pt->objectId;
++ t->chunkId = pt->chunkId;
++ t->byteCount = pt->byteCount;
++ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++ t->chunkDeleted = (pt->deleted) ? 0 : 1;
++ t->serialNumber = pt->serialNumber;
++ } else {
++ memset(t, 0, sizeof(yaffs_ExtendedTags));
++ }
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags1.h linux-2.6.32/fs/yaffs2/yaffs_packedtags1.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_packedtags1.h 2010-01-30 20:35:01.951826961 +0100
+@@ -0,0 +1,37 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
++
++#ifndef __YAFFS_PACKEDTAGS1_H__
++#define __YAFFS_PACKEDTAGS1_H__
++
++#include "yaffs_guts.h"
++
++typedef struct {
++ unsigned chunkId:20;
++ unsigned serialNumber:2;
++ unsigned byteCount:10;
++ unsigned objectId:18;
++ unsigned ecc:12;
++ unsigned deleted:1;
++ unsigned unusedStuff:1;
++ unsigned shouldBeFF;
++
++} yaffs_PackedTags1;
++
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t);
++void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt);
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags2.c linux-2.6.32/fs/yaffs2/yaffs_packedtags2.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_packedtags2.c 2010-01-30 20:35:01.991823846 +0100
+@@ -0,0 +1,206 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_packedtags2.h"
++#include "yportenv.h"
++#include "yaffs_tagsvalidity.h"
++
++/* This code packs a set of extended tags into a binary structure for
++ * NAND storage
++ */
++
++/* Some of the information is "extra" struff which can be packed in to
++ * speed scanning
++ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
++ */
++
++/* Extra flags applied to chunkId */
++
++#define EXTRA_HEADER_INFO_FLAG 0x80000000
++#define EXTRA_SHRINK_FLAG 0x40000000
++#define EXTRA_SHADOWS_FLAG 0x20000000
++#define EXTRA_SPARE_FLAGS 0x10000000
++
++#define ALL_EXTRA_FLAGS 0xF0000000
++
++/* Also, the top 4 bits of the object Id are set to the object type. */
++#define EXTRA_OBJECT_TYPE_SHIFT (28)
++#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
++
++
++static void yaffs_DumpPackedTags2TagsPart(const yaffs_PackedTags2TagsPart *ptt)
++{
++ T(YAFFS_TRACE_MTD,
++ (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
++ ptt->objectId, ptt->chunkId, ptt->byteCount,
++ ptt->sequenceNumber));
++}
++static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
++{
++ yaffs_DumpPackedTags2TagsPart(&pt->t);
++}
++
++static void yaffs_DumpTags2(const yaffs_ExtendedTags *t)
++{
++ T(YAFFS_TRACE_MTD,
++ (TSTR
++ ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d"
++ TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
++ t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
++ t->sequenceNumber));
++
++}
++
++void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt,
++ const yaffs_ExtendedTags *t)
++{
++ ptt->chunkId = t->chunkId;
++ ptt->sequenceNumber = t->sequenceNumber;
++ ptt->byteCount = t->byteCount;
++ ptt->objectId = t->objectId;
++
++ if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
++ /* Store the extra header info instead */
++ /* We save the parent object in the chunkId */
++ ptt->chunkId = EXTRA_HEADER_INFO_FLAG
++ | t->extraParentObjectId;
++ if (t->extraIsShrinkHeader)
++ ptt->chunkId |= EXTRA_SHRINK_FLAG;
++ if (t->extraShadows)
++ ptt->chunkId |= EXTRA_SHADOWS_FLAG;
++
++ ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
++ ptt->objectId |=
++ (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
++
++ if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
++ ptt->byteCount = t->extraEquivalentObjectId;
++ else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
++ ptt->byteCount = t->extraFileLength;
++ else
++ ptt->byteCount = 0;
++ }
++
++ yaffs_DumpPackedTags2TagsPart(ptt);
++ yaffs_DumpTags2(t);
++}
++
++
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
++{
++ yaffs_PackTags2TagsPart(&pt->t, t);
++
++#ifndef YAFFS_IGNORE_TAGS_ECC
++ {
++ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
++ sizeof(yaffs_PackedTags2TagsPart),
++ &pt->ecc);
++ }
++#endif
++}
++
++
++void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t,
++ yaffs_PackedTags2TagsPart *ptt)
++{
++
++ memset(t, 0, sizeof(yaffs_ExtendedTags));
++
++ yaffs_InitialiseTags(t);
++
++ if (ptt->sequenceNumber != 0xFFFFFFFF) {
++ t->blockBad = 0;
++ t->chunkUsed = 1;
++ t->objectId = ptt->objectId;
++ t->chunkId = ptt->chunkId;
++ t->byteCount = ptt->byteCount;
++ t->chunkDeleted = 0;
++ t->serialNumber = 0;
++ t->sequenceNumber = ptt->sequenceNumber;
++
++ /* Do extra header info stuff */
++
++ if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) {
++ t->chunkId = 0;
++ t->byteCount = 0;
++
++ t->extraHeaderInfoAvailable = 1;
++ t->extraParentObjectId =
++ ptt->chunkId & (~(ALL_EXTRA_FLAGS));
++ t->extraIsShrinkHeader =
++ (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
++ t->extraShadows =
++ (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
++ t->extraObjectType =
++ ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT;
++ t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
++
++ if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
++ t->extraEquivalentObjectId = ptt->byteCount;
++ else
++ t->extraFileLength = ptt->byteCount;
++ }
++ }
++
++ yaffs_DumpPackedTags2TagsPart(ptt);
++ yaffs_DumpTags2(t);
++
++}
++
++
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
++{
++
++ yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++
++ if (pt->t.sequenceNumber != 0xFFFFFFFF) {
++ /* Page is in use */
++#ifndef YAFFS_IGNORE_TAGS_ECC
++ {
++ yaffs_ECCOther ecc;
++ int result;
++ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
++ sizeof
++ (yaffs_PackedTags2TagsPart),
++ &ecc);
++ result =
++ yaffs_ECCCorrectOther((unsigned char *)&pt->t,
++ sizeof
++ (yaffs_PackedTags2TagsPart),
++ &pt->ecc, &ecc);
++ switch (result) {
++ case 0:
++ eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++ break;
++ case 1:
++ eccResult = YAFFS_ECC_RESULT_FIXED;
++ break;
++ case -1:
++ eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ break;
++ default:
++ eccResult = YAFFS_ECC_RESULT_UNKNOWN;
++ }
++ }
++#endif
++ }
++
++ yaffs_UnpackTags2TagsPart(t, &pt->t);
++
++ t->eccResult = eccResult;
++
++ yaffs_DumpPackedTags2(pt);
++ yaffs_DumpTags2(t);
++
++}
++
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags2.h linux-2.6.32/fs/yaffs2/yaffs_packedtags2.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_packedtags2.h 2010-01-30 20:35:02.031973375 +0100
+@@ -0,0 +1,43 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
++
++#ifndef __YAFFS_PACKEDTAGS2_H__
++#define __YAFFS_PACKEDTAGS2_H__
++
++#include "yaffs_guts.h"
++#include "yaffs_ecc.h"
++
++typedef struct {
++ unsigned sequenceNumber;
++ unsigned objectId;
++ unsigned chunkId;
++ unsigned byteCount;
++} yaffs_PackedTags2TagsPart;
++
++typedef struct {
++ yaffs_PackedTags2TagsPart t;
++ yaffs_ECCOther ecc;
++} yaffs_PackedTags2;
++
++/* Full packed tags with ECC, used for oob tags */
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
++
++/* Only the tags part (no ECC for use with inband tags */
++void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
++void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt);
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_qsort.c linux-2.6.32/fs/yaffs2/yaffs_qsort.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_qsort.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_qsort.c 2010-01-30 20:35:02.071829765 +0100
+@@ -0,0 +1,163 @@
++/*
++ * Copyright (c) 1992, 1993
++ * The Regents of the University of California. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. Neither the name of the University nor the names of its contributors
++ * may be used to endorse or promote products derived from this software
++ * without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
++ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
++ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
++ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
++ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
++ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
++ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
++ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
++ * SUCH DAMAGE.
++ */
++
++#include "yportenv.h"
++/* #include <linux/string.h> */
++
++/*
++ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
++ */
++#define swapcode(TYPE, parmi, parmj, n) do { \
++ long i = (n) / sizeof (TYPE); \
++ register TYPE *pi = (TYPE *) (parmi); \
++ register TYPE *pj = (TYPE *) (parmj); \
++ do { \
++ register TYPE t = *pi; \
++ *pi++ = *pj; \
++ *pj++ = t; \
++ } while (--i > 0); \
++} while (0)
++
++#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
++ es % sizeof(long) ? 2 : es == sizeof(long) ? 0 : 1;
++
++static __inline void
++swapfunc(char *a, char *b, int n, int swaptype)
++{
++ if (swaptype <= 1)
++ swapcode(long, a, b, n);
++ else
++ swapcode(char, a, b, n);
++}
++
++#define yswap(a, b) do { \
++ if (swaptype == 0) { \
++ long t = *(long *)(a); \
++ *(long *)(a) = *(long *)(b); \
++ *(long *)(b) = t; \
++ } else \
++ swapfunc(a, b, es, swaptype); \
++} while (0)
++
++#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype)
++
++static __inline char *
++med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *))
++{
++ return cmp(a, b) < 0 ?
++ (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a))
++ : (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c));
++}
++
++#ifndef min
++#define min(a, b) (((a) < (b)) ? (a) : (b))
++#endif
++
++void
++yaffs_qsort(void *aa, size_t n, size_t es,
++ int (*cmp)(const void *, const void *))
++{
++ char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
++ int d, r, swaptype, swap_cnt;
++ register char *a = aa;
++
++loop: SWAPINIT(a, es);
++ swap_cnt = 0;
++ if (n < 7) {
++ for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
++ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
++ pl -= es)
++ yswap(pl, pl - es);
++ return;
++ }
++ pm = (char *)a + (n / 2) * es;
++ if (n > 7) {
++ pl = (char *)a;
++ pn = (char *)a + (n - 1) * es;
++ if (n > 40) {
++ d = (n / 8) * es;
++ pl = med3(pl, pl + d, pl + 2 * d, cmp);
++ pm = med3(pm - d, pm, pm + d, cmp);
++ pn = med3(pn - 2 * d, pn - d, pn, cmp);
++ }
++ pm = med3(pl, pm, pn, cmp);
++ }
++ yswap(a, pm);
++ pa = pb = (char *)a + es;
++
++ pc = pd = (char *)a + (n - 1) * es;
++ for (;;) {
++ while (pb <= pc && (r = cmp(pb, a)) <= 0) {
++ if (r == 0) {
++ swap_cnt = 1;
++ yswap(pa, pb);
++ pa += es;
++ }
++ pb += es;
++ }
++ while (pb <= pc && (r = cmp(pc, a)) >= 0) {
++ if (r == 0) {
++ swap_cnt = 1;
++ yswap(pc, pd);
++ pd -= es;
++ }
++ pc -= es;
++ }
++ if (pb > pc)
++ break;
++ yswap(pb, pc);
++ swap_cnt = 1;
++ pb += es;
++ pc -= es;
++ }
++ if (swap_cnt == 0) { /* Switch to insertion sort */
++ for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
++ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
++ pl -= es)
++ yswap(pl, pl - es);
++ return;
++ }
++
++ pn = (char *)a + n * es;
++ r = min(pa - (char *)a, pb - pa);
++ vecswap(a, pb - r, r);
++ r = min((long)(pd - pc), (long)(pn - pd - es));
++ vecswap(pb, pn - r, r);
++ r = pb - pa;
++ if (r > es)
++ yaffs_qsort(a, r / es, es, cmp);
++ r = pd - pc;
++ if (r > es) {
++ /* Iterate rather than recurse to save stack space */
++ a = pn - r;
++ n = r / es;
++ goto loop;
++ }
++/* yaffs_qsort(pn - r, r / es, es, cmp);*/
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_qsort.h linux-2.6.32/fs/yaffs2/yaffs_qsort.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_qsort.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_qsort.h 2010-01-30 20:35:02.131826281 +0100
+@@ -0,0 +1,23 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#ifndef __YAFFS_QSORT_H__
++#define __YAFFS_QSORT_H__
++
++extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
++ int (*cmp)(const void *, const void *));
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_tagscompat.c linux-2.6.32/fs/yaffs2/yaffs_tagscompat.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_tagscompat.c 2010-01-30 20:35:02.173084965 +0100
+@@ -0,0 +1,541 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_guts.h"
++#include "yaffs_tagscompat.h"
++#include "yaffs_ecc.h"
++#include "yaffs_getblockinfo.h"
++
++static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND);
++#ifdef NOTYET
++static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND);
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_Spare *spare);
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_Spare *spare);
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND);
++#endif
++
++static const char yaffs_countBitsTable[256] = {
++ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
++ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
++ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
++ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
++ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
++ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
++ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
++ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
++};
++
++int yaffs_CountBits(__u8 x)
++{
++ int retVal;
++ retVal = yaffs_countBitsTable[x];
++ return retVal;
++}
++
++/********** Tags ECC calculations *********/
++
++void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
++{
++ yaffs_ECCCalculate(data, spare->ecc1);
++ yaffs_ECCCalculate(&data[256], spare->ecc2);
++}
++
++void yaffs_CalcTagsECC(yaffs_Tags *tags)
++{
++ /* Calculate an ecc */
++
++ unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
++ unsigned i, j;
++ unsigned ecc = 0;
++ unsigned bit = 0;
++
++ tags->ecc = 0;
++
++ for (i = 0; i < 8; i++) {
++ for (j = 1; j & 0xff; j <<= 1) {
++ bit++;
++ if (b[i] & j)
++ ecc ^= bit;
++ }
++ }
++
++ tags->ecc = ecc;
++
++}
++
++int yaffs_CheckECCOnTags(yaffs_Tags *tags)
++{
++ unsigned ecc = tags->ecc;
++
++ yaffs_CalcTagsECC(tags);
++
++ ecc ^= tags->ecc;
++
++ if (ecc && ecc <= 64) {
++ /* TODO: Handle the failure better. Retire? */
++ unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
++
++ ecc--;
++
++ b[ecc / 8] ^= (1 << (ecc & 7));
++
++ /* Now recvalc the ecc */
++ yaffs_CalcTagsECC(tags);
++
++ return 1; /* recovered error */
++ } else if (ecc) {
++ /* Wierd ecc failure value */
++ /* TODO Need to do somethiong here */
++ return -1; /* unrecovered error */
++ }
++
++ return 0;
++}
++
++/********** Tags **********/
++
++static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr,
++ yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
++
++ yaffs_CalcTagsECC(tagsPtr);
++
++ sparePtr->tagByte0 = tu->asBytes[0];
++ sparePtr->tagByte1 = tu->asBytes[1];
++ sparePtr->tagByte2 = tu->asBytes[2];
++ sparePtr->tagByte3 = tu->asBytes[3];
++ sparePtr->tagByte4 = tu->asBytes[4];
++ sparePtr->tagByte5 = tu->asBytes[5];
++ sparePtr->tagByte6 = tu->asBytes[6];
++ sparePtr->tagByte7 = tu->asBytes[7];
++}
++
++static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,
++ yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
++ int result;
++
++ tu->asBytes[0] = sparePtr->tagByte0;
++ tu->asBytes[1] = sparePtr->tagByte1;
++ tu->asBytes[2] = sparePtr->tagByte2;
++ tu->asBytes[3] = sparePtr->tagByte3;
++ tu->asBytes[4] = sparePtr->tagByte4;
++ tu->asBytes[5] = sparePtr->tagByte5;
++ tu->asBytes[6] = sparePtr->tagByte6;
++ tu->asBytes[7] = sparePtr->tagByte7;
++
++ result = yaffs_CheckECCOnTags(tagsPtr);
++ if (result > 0)
++ dev->tagsEccFixed++;
++ else if (result < 0)
++ dev->tagsEccUnfixed++;
++}
++
++static void yaffs_SpareInitialise(yaffs_Spare *spare)
++{
++ memset(spare, 0xFF, sizeof(yaffs_Spare));
++}
++
++static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND, const __u8 *data,
++ yaffs_Spare *spare)
++{
++ if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
++ chunkInNAND));
++ return YAFFS_FAIL;
++ }
++
++ dev->nPageWrites++;
++ return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
++}
++
++static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND,
++ __u8 *data,
++ yaffs_Spare *spare,
++ yaffs_ECCResult *eccResult,
++ int doErrorCorrection)
++{
++ int retVal;
++ yaffs_Spare localSpare;
++
++ dev->nPageReads++;
++
++ if (!spare && data) {
++ /* If we don't have a real spare, then we use a local one. */
++ /* Need this for the calculation of the ecc */
++ spare = &localSpare;
++ }
++
++ if (!dev->useNANDECC) {
++ retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
++ if (data && doErrorCorrection) {
++ /* Do ECC correction */
++ /* Todo handle any errors */
++ int eccResult1, eccResult2;
++ __u8 calcEcc[3];
++
++ yaffs_ECCCalculate(data, calcEcc);
++ eccResult1 =
++ yaffs_ECCCorrect(data, spare->ecc1, calcEcc);
++ yaffs_ECCCalculate(&data[256], calcEcc);
++ eccResult2 =
++ yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc);
++
++ if (eccResult1 > 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>yaffs ecc error fix performed on chunk %d:0"
++ TENDSTR), chunkInNAND));
++ dev->eccFixed++;
++ } else if (eccResult1 < 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>yaffs ecc error unfixed on chunk %d:0"
++ TENDSTR), chunkInNAND));
++ dev->eccUnfixed++;
++ }
++
++ if (eccResult2 > 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>yaffs ecc error fix performed on chunk %d:1"
++ TENDSTR), chunkInNAND));
++ dev->eccFixed++;
++ } else if (eccResult2 < 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>yaffs ecc error unfixed on chunk %d:1"
++ TENDSTR), chunkInNAND));
++ dev->eccUnfixed++;
++ }
++
++ if (eccResult1 || eccResult2) {
++ /* We had a data problem on this page */
++ yaffs_HandleReadDataError(dev, chunkInNAND);
++ }
++
++ if (eccResult1 < 0 || eccResult2 < 0)
++ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ else if (eccResult1 > 0 || eccResult2 > 0)
++ *eccResult = YAFFS_ECC_RESULT_FIXED;
++ else
++ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++ }
++ } else {
++ /* Must allocate enough memory for spare+2*sizeof(int) */
++ /* for ecc results from device. */
++ struct yaffs_NANDSpare nspare;
++
++ memset(&nspare, 0, sizeof(nspare));
++
++ retVal = dev->readChunkFromNAND(dev, chunkInNAND, data,
++ (yaffs_Spare *) &nspare);
++ memcpy(spare, &nspare, sizeof(yaffs_Spare));
++ if (data && doErrorCorrection) {
++ if (nspare.eccres1 > 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>mtd ecc error fix performed on chunk %d:0"
++ TENDSTR), chunkInNAND));
++ } else if (nspare.eccres1 < 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>mtd ecc error unfixed on chunk %d:0"
++ TENDSTR), chunkInNAND));
++ }
++
++ if (nspare.eccres2 > 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>mtd ecc error fix performed on chunk %d:1"
++ TENDSTR), chunkInNAND));
++ } else if (nspare.eccres2 < 0) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("**>>mtd ecc error unfixed on chunk %d:1"
++ TENDSTR), chunkInNAND));
++ }
++
++ if (nspare.eccres1 || nspare.eccres2) {
++ /* We had a data problem on this page */
++ yaffs_HandleReadDataError(dev, chunkInNAND);
++ }
++
++ if (nspare.eccres1 < 0 || nspare.eccres2 < 0)
++ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ else if (nspare.eccres1 > 0 || nspare.eccres2 > 0)
++ *eccResult = YAFFS_ECC_RESULT_FIXED;
++ else
++ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++
++ }
++ }
++ return retVal;
++}
++
++#ifdef NOTYET
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND)
++{
++ static int init;
++ static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
++ static __u8 data[YAFFS_BYTES_PER_CHUNK];
++ /* Might as well always allocate the larger size for */
++ /* dev->useNANDECC == true; */
++ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
++
++ dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
++
++ if (!init) {
++ memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
++ init = 1;
++ }
++
++ if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK))
++ return YAFFS_FAIL;
++ if (memcmp(cmpbuf, spare, 16))
++ return YAFFS_FAIL;
++
++ return YAFFS_OK;
++
++}
++#endif
++
++/*
++ * Functions for robustisizing
++ */
++
++static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++
++ /* Mark the block for retirement */
++ yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
++
++ /* TODO:
++ * Just do a garbage collection on the affected block
++ * then retire the block
++ * NB recursion
++ */
++}
++
++#ifdef NOTYET
++static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND)
++{
++}
++
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_Spare *spare)
++{
++}
++
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_Spare *spare)
++{
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++
++ /* Mark the block for retirement */
++ yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
++ /* Delete the chunk */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++}
++
++static int yaffs_VerifyCompare(const __u8 *d0, const __u8 *d1,
++ const yaffs_Spare *s0, const yaffs_Spare *s1)
++{
++
++ if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
++ s0->tagByte0 != s1->tagByte0 ||
++ s0->tagByte1 != s1->tagByte1 ||
++ s0->tagByte2 != s1->tagByte2 ||
++ s0->tagByte3 != s1->tagByte3 ||
++ s0->tagByte4 != s1->tagByte4 ||
++ s0->tagByte5 != s1->tagByte5 ||
++ s0->tagByte6 != s1->tagByte6 ||
++ s0->tagByte7 != s1->tagByte7 ||
++ s0->ecc1[0] != s1->ecc1[0] ||
++ s0->ecc1[1] != s1->ecc1[1] ||
++ s0->ecc1[2] != s1->ecc1[2] ||
++ s0->ecc2[0] != s1->ecc2[0] ||
++ s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) {
++ return 0;
++ }
++
++ return 1;
++}
++#endif /* NOTYET */
++
++int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *eTags)
++{
++ yaffs_Spare spare;
++ yaffs_Tags tags;
++
++ yaffs_SpareInitialise(&spare);
++
++ if (eTags->chunkDeleted)
++ spare.pageStatus = 0;
++ else {
++ tags.objectId = eTags->objectId;
++ tags.chunkId = eTags->chunkId;
++
++ tags.byteCountLSB = eTags->byteCount & 0x3ff;
++
++ if (dev->nDataBytesPerChunk >= 1024)
++ tags.byteCountMSB = (eTags->byteCount >> 10) & 3;
++ else
++ tags.byteCountMSB = 3;
++
++
++ tags.serialNumber = eTags->serialNumber;
++
++ if (!dev->useNANDECC && data)
++ yaffs_CalcECC(data, &spare);
++
++ yaffs_LoadTagsIntoSpare(&spare, &tags);
++
++ }
++
++ return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
++}
++
++int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ __u8 *data,
++ yaffs_ExtendedTags *eTags)
++{
++
++ yaffs_Spare spare;
++ yaffs_Tags tags;
++ yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN;
++
++ static yaffs_Spare spareFF;
++ static int init;
++
++ if (!init) {
++ memset(&spareFF, 0xFF, sizeof(spareFF));
++ init = 1;
++ }
++
++ if (yaffs_ReadChunkFromNAND
++ (dev, chunkInNAND, data, &spare, &eccResult, 1)) {
++ /* eTags may be NULL */
++ if (eTags) {
++
++ int deleted =
++ (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
++
++ eTags->chunkDeleted = deleted;
++ eTags->eccResult = eccResult;
++ eTags->blockBad = 0; /* We're reading it */
++ /* therefore it is not a bad block */
++ eTags->chunkUsed =
++ (memcmp(&spareFF, &spare, sizeof(spareFF)) !=
++ 0) ? 1 : 0;
++
++ if (eTags->chunkUsed) {
++ yaffs_GetTagsFromSpare(dev, &spare, &tags);
++
++ eTags->objectId = tags.objectId;
++ eTags->chunkId = tags.chunkId;
++ eTags->byteCount = tags.byteCountLSB;
++
++ if (dev->nDataBytesPerChunk >= 1024)
++ eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10);
++
++ eTags->serialNumber = tags.serialNumber;
++ }
++ }
++
++ return YAFFS_OK;
++ } else {
++ return YAFFS_FAIL;
++ }
++}
++
++int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
++ int blockInNAND)
++{
++
++ yaffs_Spare spare;
++
++ memset(&spare, 0xff, sizeof(yaffs_Spare));
++
++ spare.blockStatus = 'Y';
++
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
++ &spare);
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
++ NULL, &spare);
++
++ return YAFFS_OK;
++
++}
++
++int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
++ int blockNo,
++ yaffs_BlockState *state,
++ __u32 *sequenceNumber)
++{
++
++ yaffs_Spare spare0, spare1;
++ static yaffs_Spare spareFF;
++ static int init;
++ yaffs_ECCResult dummy;
++
++ if (!init) {
++ memset(&spareFF, 0xFF, sizeof(spareFF));
++ init = 1;
++ }
++
++ *sequenceNumber = 0;
++
++ yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
++ &spare0, &dummy, 1);
++ yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
++ &spare1, &dummy, 1);
++
++ if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
++ *state = YAFFS_BLOCK_STATE_DEAD;
++ else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0)
++ *state = YAFFS_BLOCK_STATE_EMPTY;
++ else
++ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++
++ return YAFFS_OK;
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_tagscompat.h linux-2.6.32/fs/yaffs2/yaffs_tagscompat.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_tagscompat.h 2010-01-30 20:35:02.213084840 +0100
+@@ -0,0 +1,39 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_TAGSCOMPAT_H__
++#define __YAFFS_TAGSCOMPAT_H__
++
++#include "yaffs_guts.h"
++int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags);
++int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
++ int chunkInNAND,
++ __u8 *data,
++ yaffs_ExtendedTags *tags);
++int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
++ int blockNo);
++int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
++ int blockNo,
++ yaffs_BlockState *state,
++ __u32 *sequenceNumber);
++
++void yaffs_CalcTagsECC(yaffs_Tags *tags);
++int yaffs_CheckECCOnTags(yaffs_Tags *tags);
++int yaffs_CountBits(__u8 byte);
++
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.32/fs/yaffs2/yaffs_tagsvalidity.c
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_tagsvalidity.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_tagsvalidity.c 2010-01-30 20:35:02.251827798 +0100
+@@ -0,0 +1,28 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_tagsvalidity.h"
++
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
++{
++ memset(tags, 0, sizeof(yaffs_ExtendedTags));
++ tags->validMarker0 = 0xAAAAAAAA;
++ tags->validMarker1 = 0x55555555;
++}
++
++int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
++{
++ return (tags->validMarker0 == 0xAAAAAAAA &&
++ tags->validMarker1 == 0x55555555);
++
++}
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.32/fs/yaffs2/yaffs_tagsvalidity.h
+--- linux-2.6.32.orig/fs/yaffs2/yaffs_tagsvalidity.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yaffs_tagsvalidity.h 2010-01-30 20:35:02.292761803 +0100
+@@ -0,0 +1,24 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#ifndef __YAFFS_TAGS_VALIDITY_H__
++#define __YAFFS_TAGS_VALIDITY_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
++int yaffs_ValidateTags(yaffs_ExtendedTags *tags);
++#endif
+diff -Nur linux-2.6.32.orig/fs/yaffs2/yportenv.h linux-2.6.32/fs/yaffs2/yportenv.h
+--- linux-2.6.32.orig/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.32/fs/yaffs2/yportenv.h 2010-01-30 20:35:02.332076176 +0100
+@@ -0,0 +1,203 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#ifndef __YPORTENV_H__
++#define __YPORTENV_H__
++
++/*
++ * Define the MTD version in terms of Linux Kernel versions
++ * This allows yaffs to be used independantly of the kernel
++ * as well as with it.
++ */
++
++#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
++
++#if defined CONFIG_YAFFS_WINCE
++
++#include "ywinceenv.h"
++
++#elif defined __KERNEL__
++
++#include "moduleconfig.h"
++
++/* Linux kernel */
++
++#include <linux/version.h>
++#define MTD_VERSION_CODE LINUX_VERSION_CODE
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++#include <linux/config.h>
++#endif
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++
++#define YCHAR char
++#define YUCHAR unsigned char
++#define _Y(x) x
++#define yaffs_strcat(a, b) strcat(a, b)
++#define yaffs_strcpy(a, b) strcpy(a, b)
++#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
++#define yaffs_strncmp(a, b, c) strncmp(a, b, c)
++#define yaffs_strlen(s) strlen(s)
++#define yaffs_sprintf sprintf
++#define yaffs_toupper(a) toupper(a)
++
++#define Y_INLINE inline
++
++#define YAFFS_LOSTNFOUND_NAME "lost+found"
++#define YAFFS_LOSTNFOUND_PREFIX "obj"
++
++/* #define YPRINTF(x) printk x */
++#define YMALLOC(x) kmalloc(x, GFP_NOFS)
++#define YFREE(x) kfree(x)
++#define YMALLOC_ALT(x) vmalloc(x)
++#define YFREE_ALT(x) vfree(x)
++#define YMALLOC_DMA(x) YMALLOC(x)
++
++/* KR - added for use in scan so processes aren't blocked indefinitely. */
++#define YYIELD() schedule()
++
++#define YAFFS_ROOT_MODE 0666
++#define YAFFS_LOSTNFOUND_MODE 0666
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
++#define Y_TIME_CONVERT(x) (x).tv_sec
++#else
++#define Y_CURRENT_TIME CURRENT_TIME
++#define Y_TIME_CONVERT(x) (x)
++#endif
++
++#define yaffs_SumCompare(x, y) ((x) == (y))
++#define yaffs_strcmp(a, b) strcmp(a, b)
++
++#define TENDSTR "\n"
++#define TSTR(x) KERN_WARNING x
++#define TCONT(x) x
++#define TOUT(p) printk p
++
++#define yaffs_trace(mask, fmt, args...) \
++ do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
++ printk(KERN_WARNING "yaffs: " fmt, ## args); \
++ } while (0)
++
++#define compile_time_assertion(assertion) \
++ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
++
++#elif defined CONFIG_YAFFS_DIRECT
++
++#define MTD_VERSION_CODE MTD_VERSION(2, 6, 22)
++
++/* Direct interface */
++#include "ydirectenv.h"
++
++#elif defined CONFIG_YAFFS_UTIL
++
++/* Stuff for YAFFS utilities */
++
++#include "stdlib.h"
++#include "stdio.h"
++#include "string.h"
++
++#include "devextras.h"
++
++#define YMALLOC(x) malloc(x)
++#define YFREE(x) free(x)
++#define YMALLOC_ALT(x) malloc(x)
++#define YFREE_ALT(x) free(x)
++
++#define YCHAR char
++#define YUCHAR unsigned char
++#define _Y(x) x
++#define yaffs_strcat(a, b) strcat(a, b)
++#define yaffs_strcpy(a, b) strcpy(a, b)
++#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
++#define yaffs_strlen(s) strlen(s)
++#define yaffs_sprintf sprintf
++#define yaffs_toupper(a) toupper(a)
++
++#define Y_INLINE inline
++
++/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */
++/* #define YALERT(s) YINFO(s) */
++
++#define TENDSTR "\n"
++#define TSTR(x) x
++#define TOUT(p) printf p
++
++#define YAFFS_LOSTNFOUND_NAME "lost+found"
++#define YAFFS_LOSTNFOUND_PREFIX "obj"
++/* #define YPRINTF(x) printf x */
++
++#define YAFFS_ROOT_MODE 0666
++#define YAFFS_LOSTNFOUND_MODE 0666
++
++#define yaffs_SumCompare(x, y) ((x) == (y))
++#define yaffs_strcmp(a, b) strcmp(a, b)
++
++#else
++/* Should have specified a configuration type */
++#error Unknown configuration
++
++#endif
++
++/* see yaffs_fs.c */
++extern unsigned int yaffs_traceMask;
++extern unsigned int yaffs_wr_attempts;
++
++/*
++ * Tracing flags.
++ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
++ */
++
++#define YAFFS_TRACE_OS 0x00000002
++#define YAFFS_TRACE_ALLOCATE 0x00000004
++#define YAFFS_TRACE_SCAN 0x00000008
++#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
++#define YAFFS_TRACE_ERASE 0x00000020
++#define YAFFS_TRACE_GC 0x00000040
++#define YAFFS_TRACE_WRITE 0x00000080
++#define YAFFS_TRACE_TRACING 0x00000100
++#define YAFFS_TRACE_DELETION 0x00000200
++#define YAFFS_TRACE_BUFFERS 0x00000400
++#define YAFFS_TRACE_NANDACCESS 0x00000800
++#define YAFFS_TRACE_GC_DETAIL 0x00001000
++#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
++#define YAFFS_TRACE_MTD 0x00004000
++#define YAFFS_TRACE_CHECKPOINT 0x00008000
++
++#define YAFFS_TRACE_VERIFY 0x00010000
++#define YAFFS_TRACE_VERIFY_NAND 0x00020000
++#define YAFFS_TRACE_VERIFY_FULL 0x00040000
++#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
++
++
++#define YAFFS_TRACE_ERROR 0x40000000
++#define YAFFS_TRACE_BUG 0x80000000
++#define YAFFS_TRACE_ALWAYS 0xF0000000
++
++
++#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
++
++#ifndef YBUG
++#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
++#endif
++
++#endif
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