update all targets to 2.6.32

9 files changed, 0 insertions, 64422 deletions

diff --git a/target/linux/patches/2.6.31.5/aufs2.patch b/target/linux/patches/2.6.31.5/aufs2.patch
deleted file mode 100644
index 6c40cfb81..000000000
--- a/target/linux/patches/2.6.31.5/aufs2.patch
+++ /dev/null
@@ -1,24455 +0,0 @@
-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