summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--Makefile8
-rw-r--r--mk/build.mk46
-rw-r--r--mk/modules.mk5
-rw-r--r--package/asterisk/Makefile8
-rw-r--r--package/asterisk/patches/patch-channels_chan_iax2_c20
-rw-r--r--package/asterisk/patches/patch-channels_chan_oss_c37
-rw-r--r--package/asterisk/patches/patch-main_astobj2_c11
-rw-r--r--package/asterisk/patches/patch-main_translate_c11
-rw-r--r--package/asterisk/patches/patch-menuselect-tree12
-rw-r--r--package/asterisk/patches/patch-res_res_features_c11
-rwxr-xr-xpackage/base-files/extra/init2
-rwxr-xr-xpackage/base-files/extra/sbin/update12
-rw-r--r--package/curl/Makefile12
-rw-r--r--package/curl/patches/patch-configure11
-rw-r--r--package/openntpd/Makefile2
-rw-r--r--package/openntpd/files/ntpd.init4
-rw-r--r--package/openntpd/files/openntpd.postinst3
-rw-r--r--package/radvd/Makefile4
-rw-r--r--package/rpm/Makefile6
-rw-r--r--package/strace/Makefile4
-rw-r--r--package/strace/patches/patch-config_h_in15
-rw-r--r--package/strace/patches/patch-configure26
-rw-r--r--package/strace/patches/patch-configure_ac18
-rw-r--r--package/strace/patches/patch-linux_arm_syscallent_h15
-rw-r--r--package/strace/patches/patch-net_c10
-rw-r--r--package/strace/patches/patch-process_c109
-rw-r--r--package/strace/patches/patch-signal_c42
-rw-r--r--package/strace/patches/patch-syscall_c81
-rw-r--r--package/strace/patches/patch-system_c11
-rw-r--r--package/strace/patches/patch-util_c53
-rw-r--r--package/tor/Makefile6
-rw-r--r--package/tor/patches/patch-configure12
-rw-r--r--package/tor/patches/patch-contrib_suse_tor_sh11
-rw-r--r--package/tor/patches/patch-contrib_tor_sh11
-rw-r--r--package/tor/patches/patch-contrib_torctl27
-rw-r--r--package/tor/patches/patch-src_common_util_h33
-rw-r--r--package/tor/patches/patch-src_or_eventdns_c18
-rw-r--r--package/tor/patches/patch-tor_spec11
-rw-r--r--package/udev/Makefile3
-rw-r--r--rules.mk5
-rw-r--r--scripts/scan-pkgs.sh9
-rw-r--r--target/Config.in1
-rw-r--r--target/alix1c/target.mk4
-rw-r--r--target/linux/config/Config.in.block4
-rw-r--r--target/linux/config/Config.in.netdevice11
-rw-r--r--target/linux/config/Config.in.netfilter7
-rw-r--r--target/linux/patches/2.6.30.5/aufs2-2.6.30.patch24453
-rw-r--r--target/linux/patches/2.6.30.5/mips-delay-fix.patch27
-rw-r--r--target/linux/patches/2.6.30.5/mtd-root.patch62
-rw-r--r--target/linux/patches/2.6.31.4/cygwin-compat.patch66
-rw-r--r--target/linux/patches/2.6.31.4/freebsd-compat.patch11
-rw-r--r--target/linux/patches/2.6.31.4/ocf.patch23653
-rw-r--r--target/linux/patches/2.6.31.4/startup.patch20
-rw-r--r--target/linux/patches/2.6.31.4/swconfig.patch1075
-rw-r--r--target/linux/patches/2.6.31.4/yaffs2.patch15066
-rw-r--r--target/linux/patches/2.6.32/aufs2.patch (renamed from target/linux/patches/2.6.31.4/aufs2.patch)454
-rw-r--r--target/linux/patches/2.6.32/cris-initrd.patch (renamed from target/linux/patches/2.6.31.4/cris-initrd.patch)0
-rw-r--r--target/linux/patches/2.6.32/cygwin-compat.patch (renamed from target/linux/patches/2.6.30.5/cygwin-compat.patch)0
-rw-r--r--target/linux/patches/2.6.32/freebsd-compat.patch (renamed from target/linux/patches/2.6.30.5/freebsd-compat.patch)0
-rw-r--r--target/linux/patches/2.6.32/mtd-root.patch (renamed from target/linux/patches/2.6.31.4/mtd-root.patch)0
-rw-r--r--target/linux/patches/2.6.32/ocf.patch (renamed from target/linux/patches/2.6.30.5/ocf.patch)0
-rw-r--r--target/linux/patches/2.6.32/scsi-header.patch41
-rw-r--r--target/linux/patches/2.6.32/startup.patch (renamed from target/linux/patches/2.6.30.5/startup.patch)0
-rw-r--r--target/linux/patches/2.6.32/swconfig.patch (renamed from target/linux/patches/2.6.30.5/swconfig.patch)0
-rw-r--r--target/linux/patches/2.6.32/yaffs2.patch (renamed from target/linux/patches/2.6.30.5/yaffs2.patch)0
65 files changed, 588 insertions, 65122 deletions
diff --git a/Makefile b/Makefile
index 79064a3f0..eaddd6ca3 100644
--- a/Makefile
+++ b/Makefile
@@ -132,14 +132,12 @@ allconfig: .prereq_done
allmodconfig: .prereq_done
@${GMAKE_INV} _mconfig W=-o RCONFIG=Config.in
-allmoddefconfig: .prereq_done
- @if [ -z "$(TARGET)" ];then echo "You need to specify a target"; exit 1;fi
- cp $(TOPDIR)/target/$(TARGET)/default.config $(TOPDIR)/.defconfig
- @${GMAKE_INV} _mconfig W="-m -o -D .defconfig" RCONFIG=Config.in
-
package_index: .prereq_done
@${GMAKE_INV} package_index
+bulk: .prereq_done
+ @${GMAKE_INV} bulk
+
world: .prereq_done
@${GMAKE_INV} world
diff --git a/mk/build.mk b/mk/build.mk
index aa97026cb..34ae7935a 100644
--- a/mk/build.mk
+++ b/mk/build.mk
@@ -13,7 +13,24 @@ CONFIG = config
DEFCONFIG= ADK_DEVELSYSTEM=n \
ADK_DEBUG=n \
ADK_STATIC=n \
- ADK_FORCE_PARALLEL=n
+ ADK_FORCE_PARALLEL=n \
+ BUSYBOX_SELINUX=n \
+ BUSYBOX_LOCALE_SUPPORT=n \
+ BUSYBOX_FEATURE_PREFER_APPLETS=n \
+ BUSYBOX_FEATURE_SUID=n \
+ BUSYBOX_SELINUXENABLED=n \
+ BUSYBOX_FEATURE_INSTALLER=n \
+ BUSYBOX_PAM=n \
+ BUSYBOX_FLASH_LOCK=n \
+ BUSYBOX_FLASH_UNLOCK=n \
+ BUSYBOX_FLASH_ERASEALL=n \
+ BUSYBOX_PIE=n \
+ BUSYBOX_DEBUG=n \
+ BUSYBOX_NOMMU=n \
+ BUSYBOX_WERROR=n \
+ BUSYBOX_STATIC=n \
+ ADK_KERNEL_RT2X00_DEBUG=n \
+ ADK_KERNEL_ATH5K_DEBUG=n
noconfig_targets:= menuconfig \
_config \
@@ -227,7 +244,26 @@ modconfig:
echo $$symbol >> $(TOPDIR)/all.config; \
done; \
fi
+ @if [ ! -z "$(FS)" ];then \
+ grep "^config" target/Config.in \
+ |grep -i "$(FS)" \
+ |sed -e "s#^config \(.*\)#\1=y#" \
+ >> $(TOPDIR)/all.config; \
+ fi
+ @if [ ! -z "$(PKG)" ];then \
+ grep "^config" target/Config.in \
+ |grep -i "$(PKG)" \
+ |sed -e "s#^config \(.*\)#\1=y#" \
+ >> $(TOPDIR)/all.config; \
+ fi
+ @if [ ! -z "$(LIBC)" ];then \
+ grep "^config" target/Config.in \
+ |grep -i "$(LIBC)" \
+ |sed -e "s#^config \(.*\)#\1=y#" \
+ >> $(TOPDIR)/all.config; \
+ fi
ifneq (,$(filter %_qemu,${TARGET}))
+
@echo ADK_LINUX_QEMU=y >> $(TOPDIR)/all.config
endif
ifneq (,$(filter %_rescue,${TARGET}))
@@ -248,6 +284,14 @@ _mconfig: ${CONFIG}/conf _mconfig2 _config
_mconfig2: ${CONFIG}/conf modconfig
@${CONFIG}/conf -m ${RCONFIG} >/dev/null
+# build all targets and combinations
+bulk:
+ mkdir $(TOPDIR)/bulk
+ $(MAKE) TARGET=alix1c LIBC=uclibc FS=nfsroot PKG=ipkg allmodconfig
+ $(MAKE) v
+ $(CP) $(BIN_DIR) $(TOPDIR)/bulk
+ $(MAKE) cleantarget
+
distclean:
@$(MAKE) -C $(CONFIG) clean
@rm -rf $(BUILD_DIR) $(TOOLS_BUILD_DIR) $(BIN_DIR) $(DISTDIR) \
diff --git a/mk/modules.mk b/mk/modules.mk
index 19ab1b14d..cbaaca78f 100644
--- a/mk/modules.mk
+++ b/mk/modules.mk
@@ -58,7 +58,6 @@ $(eval $(call KMOD_template,ATH5K,mac80211-ath5k,\
,20, kmod-led-class))
$(eval $(call KMOD_template,RT2X00,mac80211-rt2x00,\
- $(MODULES_DIR)/kernel/drivers/input/input-polldev \
$(MODULES_DIR)/kernel/drivers/net/wireless/rt2x00/rt2x00lib \
$(MODULES_DIR)/kernel/drivers/net/wireless/rt2x00/rt2x00pci \
,17))
@@ -490,10 +489,6 @@ $(eval $(call KMOD_template,IP_NF_TARGET_NETMAP,nf-ip-target-netmap,\
$(MODULES_DIR)/kernel/net/ipv4/netfilter/ipt_NETMAP \
,65))
-$(eval $(call KMOD_template,IP_NF_TARGET_SAME,nf-ip-target-same,\
- $(MODULES_DIR)/kernel/net/ipv4/netfilter/ipt_SAME \
-,65))
-
#
# Mangle
#
diff --git a/package/asterisk/Makefile b/package/asterisk/Makefile
index d234b8a57..ecb33b52d 100644
--- a/package/asterisk/Makefile
+++ b/package/asterisk/Makefile
@@ -4,9 +4,9 @@
include $(TOPDIR)/rules.mk
PKG_NAME:= asterisk
-PKG_VERSION:= 1.4.26.3
+PKG_VERSION:= 1.4.27.1
PKG_RELEASE:= 1
-PKG_MD5SUM:= 04017dfdc8caeb8f4663b5dc4a9e1019
+PKG_MD5SUM:= e09ca163a6e90018c92c65a50b9ec398
PKG_DESCR:= Open Source PBX
PKG_SECTION:= net
PKG_DEPENDS:= libncurses libpthread libopenssl libcurl
@@ -121,8 +121,8 @@ pre-configure:
post-build:
cd ${WRKBUILD}/sounds ; \
- tar xzf asterisk-core-sounds-en-gsm-1.4.15.tar.gz ; \
- rm asterisk-core-sounds-en-gsm-1.4.15.tar.gz
+ tar xzf asterisk-core-sounds-en-gsm-1.4.16.tar.gz ; \
+ rm asterisk-core-sounds-en-gsm-1.4.16.tar.gz
@echo
@echo "---> have to install ${SUB_INSTALLS-m} ${SUB_INSTALLS-y} <---"
@echo
diff --git a/package/asterisk/patches/patch-channels_chan_iax2_c b/package/asterisk/patches/patch-channels_chan_iax2_c
new file mode 100644
index 000000000..f39c2bf5b
--- /dev/null
+++ b/package/asterisk/patches/patch-channels_chan_iax2_c
@@ -0,0 +1,20 @@
+--- asterisk-1.4.27.1.orig/channels/chan_iax2.c 2009-11-10 18:15:57.000000000 +0100
++++ asterisk-1.4.27.1/channels/chan_iax2.c 2009-12-03 20:57:05.000000000 +0100
+@@ -7076,7 +7076,7 @@ static int try_transfer(struct chan_iax2
+
+ memset(&ied, 0, sizeof(ied));
+ if (ies->apparent_addr)
+- bcopy(ies->apparent_addr, &new, sizeof(new));
++ memcpy(&new, ies->apparent_addr, sizeof(new));
+ if (ies->callno)
+ newcall = ies->callno;
+ if (!newcall || !new.sin_addr.s_addr || !new.sin_port) {
+@@ -7235,7 +7235,7 @@ static int iax2_ack_registry(struct iax_
+
+ memset(&us, 0, sizeof(us));
+ if (ies->apparent_addr)
+- bcopy(ies->apparent_addr, &us, sizeof(us));
++ memcpy(&us, ies->apparent_addr, sizeof(us));
+ if (ies->username)
+ ast_copy_string(peer, ies->username, sizeof(peer));
+ if (ies->refresh)
diff --git a/package/asterisk/patches/patch-channels_chan_oss_c b/package/asterisk/patches/patch-channels_chan_oss_c
new file mode 100644
index 000000000..33e9aaad7
--- /dev/null
+++ b/package/asterisk/patches/patch-channels_chan_oss_c
@@ -0,0 +1,37 @@
+--- asterisk-1.4.27.1.orig/channels/chan_oss.c 2009-08-10 21:15:57.000000000 +0200
++++ asterisk-1.4.27.1/channels/chan_oss.c 2009-12-03 20:58:13.000000000 +0100
+@@ -562,7 +562,7 @@ static void send_sound(struct chan_oss_p
+ l = FRAME_SIZE - ofs;
+ if (l > s->datalen - start) /* don't overflow the source */
+ l = s->datalen - start;
+- bcopy(s->data + start, myframe + ofs, l * 2);
++ memcpy(myframe + ofs, s->data + start, l * 2);
+ if (0)
+ ast_log(LOG_WARNING, "send_sound sound %d/%d of %d into %d\n", l_sampsent, l, s->samplen, ofs);
+ l_sampsent += l;
+@@ -573,14 +573,14 @@ static void send_sound(struct chan_oss_p
+ if (l > 0) {
+ if (l > FRAME_SIZE - ofs)
+ l = FRAME_SIZE - ofs;
+- bcopy(silence, myframe + ofs, l * 2);
++ memcpy(myframe + ofs, silence, l * 2);
+ l_sampsent += l;
+ } else { /* silence is over, restart sound if loop */
+ if (s->repeat == 0) { /* last block */
+ o->cursound = -1;
+ o->nosound = 0; /* allow audio data */
+ if (ofs < FRAME_SIZE) /* pad with silence */
+- bcopy(silence, myframe + ofs, (FRAME_SIZE - ofs) * 2);
++ memcpy(myframe + ofs, silence, (FRAME_SIZE - ofs) * 2);
+ }
+ l_sampsent = 0;
+ }
+@@ -905,7 +905,7 @@ static struct ast_frame *oss_read(struct
+
+ /* XXX can be simplified returning &ast_null_frame */
+ /* prepare a NULL frame in case we don't have enough data to return */
+- bzero(f, sizeof(struct ast_frame));
++ memset(f, 0, sizeof(struct ast_frame));
+ f->frametype = AST_FRAME_NULL;
+ f->src = oss_tech.type;
+
diff --git a/package/asterisk/patches/patch-main_astobj2_c b/package/asterisk/patches/patch-main_astobj2_c
new file mode 100644
index 000000000..d8aaf114b
--- /dev/null
+++ b/package/asterisk/patches/patch-main_astobj2_c
@@ -0,0 +1,11 @@
+--- asterisk-1.4.27.1.orig/main/astobj2.c 2009-10-06 03:16:36.000000000 +0200
++++ asterisk-1.4.27.1/main/astobj2.c 2009-12-03 20:54:12.000000000 +0100
+@@ -236,7 +236,7 @@ int ao2_ref(void *user_data, const int d
+ /* for safety, zero-out the astobj2 header and also the
+ * first word of the user-data, which we make sure is always
+ * allocated. */
+- bzero(obj, sizeof(struct astobj2 *) + sizeof(void *) );
++ memset(obj, 0, sizeof(struct astobj2 *) + sizeof(void *) );
+ free(obj);
+ }
+
diff --git a/package/asterisk/patches/patch-main_translate_c b/package/asterisk/patches/patch-main_translate_c
new file mode 100644
index 000000000..36d7c3058
--- /dev/null
+++ b/package/asterisk/patches/patch-main_translate_c
@@ -0,0 +1,11 @@
+--- asterisk-1.4.27.1.orig/main/translate.c 2009-10-21 18:44:49.000000000 +0200
++++ asterisk-1.4.27.1/main/translate.c 2009-12-03 20:53:36.000000000 +0100
+@@ -442,7 +442,7 @@ static void rebuild_matrix(int samples)
+ if (option_debug)
+ ast_log(LOG_DEBUG, "Resetting translation matrix\n");
+
+- bzero(tr_matrix, sizeof(tr_matrix));
++ memset(tr_matrix, 0, sizeof(tr_matrix));
+
+ /* first, compute all direct costs */
+ AST_LIST_TRAVERSE(&translators, t, list) {
diff --git a/package/asterisk/patches/patch-menuselect-tree b/package/asterisk/patches/patch-menuselect-tree
new file mode 100644
index 000000000..6bac1894d
--- /dev/null
+++ b/package/asterisk/patches/patch-menuselect-tree
@@ -0,0 +1,12 @@
+--- asterisk-1.4.27.1.orig/menuselect-tree 2009-11-30 19:30:41.000000000 +0100
++++ asterisk-1.4.27.1/menuselect-tree 2009-12-03 20:55:04.000000000 +0100
+@@ -59,9 +59,6 @@
+ <member name="app_flash" displayname="Flash channel application" remove_on_change="apps/app_flash.o apps/app_flash.so">
+ <depend>dahdi</depend>
+ </member>
+-<member name="app_followme" displayname="Find-Me/Follow-Me Application" remove_on_change="apps/app_followme.o apps/app_followme.so">
+- <depend>chan_local</depend>
+-</member>
+ <member name="app_forkcdr" displayname="Fork The CDR into 2 separate entities" remove_on_change="apps/app_forkcdr.o apps/app_forkcdr.so">
+ </member>
+ <member name="app_getcpeid" displayname="Get ADSI CPE ID" remove_on_change="apps/app_getcpeid.o apps/app_getcpeid.so">
diff --git a/package/asterisk/patches/patch-res_res_features_c b/package/asterisk/patches/patch-res_res_features_c
new file mode 100644
index 000000000..a237fbf97
--- /dev/null
+++ b/package/asterisk/patches/patch-res_res_features_c
@@ -0,0 +1,11 @@
+--- asterisk-1.4.27.1.orig/res/res_features.c 2009-10-20 19:46:37.000000000 +0200
++++ asterisk-1.4.27.1/res/res_features.c 2009-12-03 20:53:57.000000000 +0100
+@@ -279,7 +279,7 @@ static void *ast_bridge_call_thread(void
+ ast_bridge_call(tobj->peer, tobj->chan, &tobj->bconfig);
+ ast_hangup(tobj->chan);
+ ast_hangup(tobj->peer);
+- bzero(tobj, sizeof(*tobj)); /*! \todo XXX for safety */
++ memset(tobj, 0, sizeof(*tobj)); /*! \todo XXX for safety */
+ free(tobj);
+ return NULL;
+ }
diff --git a/package/base-files/extra/init b/package/base-files/extra/init
index db8c3a676..e11446366 100755
--- a/package/base-files/extra/init
+++ b/package/base-files/extra/init
@@ -8,7 +8,7 @@ mount -o nosuid,nodev,noexec -t sysfs sysfs /sys
mount none /tmp -t tmpfs -o size=${size}k
mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
}
-mount -o nosuid,size=64k,mode=0755 -t tmpfs mdev /dev
+mount -o nosuid,size=128k,mode=0755 -t tmpfs mdev /dev
mkdir /dev/pts /dev/shm
mount -o nosuid,noexec -t devpts devpts /dev/pts
exec 0<>/dev/console >&0 2>&0
diff --git a/package/base-files/extra/sbin/update b/package/base-files/extra/sbin/update
index 10d6e58c2..0cd4ee713 100755
--- a/package/base-files/extra/sbin/update
+++ b/package/base-files/extra/sbin/update
@@ -6,9 +6,6 @@ if [ $who -ne 0 ]; then
exit 1
fi
-cd /
-umount -f /etc
-mount -o remount,rw /
check_exit() {
if [ $? -ne 0 ];then
@@ -17,17 +14,26 @@ check_exit() {
fi
}
+prepare() {
+ cd /
+ umount -f /etc
+ mount -o remount,rw /
+}
+
extract_from_file() {
+ prepare
cat $1 | gunzip -c | tar -xf -
check_exit
}
extract_from_ssh() {
+ prepare
ssh $1 "cat $2" | gunzip -c | tar -xf -
check_exit
}
extract_from_http() {
+ prepare
wget -O - $1 | gunzip -c | tar -xf -
check_exit
}
diff --git a/package/curl/Makefile b/package/curl/Makefile
index a0e27d77c..69768dc63 100644
--- a/package/curl/Makefile
+++ b/package/curl/Makefile
@@ -4,9 +4,9 @@
include ${TOPDIR}/rules.mk
PKG_NAME:= curl
-PKG_VERSION:= 7.19.6
+PKG_VERSION:= 7.19.7
PKG_RELEASE:= 1
-PKG_MD5SUM:= 6625de9d42d1b8d3af372d3241a576fd
+PKG_MD5SUM:= ecb2e37e45c9933e2a963cabe03670ab
PKG_DESCR:= a client-side URL transfer tool
PKG_SECTION:= net
PKG_URL:= http://curl.haxx.se
@@ -28,7 +28,7 @@ $(eval $(call PKG_template,CURL,curl,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS
$(eval $(call PKG_template,LIBCURL,libcurl,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS_1},${PKG_DESCR_1},${PKG_SECTION_1}))
$(eval $(call PKG_template,LIBCURL_DEV,libcurl-dev,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS_1},${PKG_DESCR_1},${PKG_SECTION_1}))
-CONFIGURE_STYLE= gnu
+CONFIGURE_STYLE:= gnu
CONFIGURE_ENV+= curl_typeof_curl_socklen_t=socklen_t
CONFIGURE_ARGS+= --disable-thread \
--enable-cookies \
@@ -50,14 +50,14 @@ CONFIGURE_ARGS+= --disable-thread \
--without-ca-bundle \
--without-gnutls \
--without-libidn
-BUILD_STYLE= auto
-INSTALL_STYLE= auto
+BUILD_STYLE:= auto
+INSTALL_STYLE:= auto
post-install:
${INSTALL_DIR} ${IDIR_CURL}/usr/bin ${IDIR_LIBCURL}/usr/lib
${INSTALL_DIR} ${IDIR_LIBCURL_DEV}/usr/include/curl
${CP} ${WRKINST}/usr/bin/curl ${IDIR_CURL}/usr/bin/
- ${CP} ${WRKINST}/usr/lib/libcurl.so.* ${IDIR_LIBCURL}/usr/lib/
+ ${CP} ${WRKINST}/usr/lib/libcurl.so* ${IDIR_LIBCURL}/usr/lib/
${CP} ${WRKINST}/usr/include/curl/*.h ${IDIR_LIBCURL_DEV}/usr/include/curl/
include ${TOPDIR}/mk/pkg-bottom.mk
diff --git a/package/curl/patches/patch-configure b/package/curl/patches/patch-configure
index 3cb59e18e..21c0b095d 100644
--- a/package/curl/patches/patch-configure
+++ b/package/curl/patches/patch-configure
@@ -1,6 +1,6 @@
---- curl-7.19.6.orig/configure 2009-07-22 22:11:25.000000000 +0200
-+++ curl-7.19.6/configure 2009-10-01 14:05:37.578930054 +0200
-@@ -25479,16 +25479,6 @@ fi
+--- curl-7.19.7.orig/configure 2009-11-04 13:26:02.000000000 +0100
++++ curl-7.19.7/configure 2009-12-03 21:07:01.000000000 +0100
+@@ -19233,15 +19233,6 @@ fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
@@ -9,11 +9,10 @@
-
- LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$LIB_OPENSSL"
- export LD_LIBRARY_PATH
-- { $as_echo "$as_me:$LINENO: Added $LIB_OPENSSL to LD_LIBRARY_PATH" >&5
+- { $as_echo "$as_me:${as_lineno-$LINENO}: Added $LIB_OPENSSL to LD_LIBRARY_PATH" >&5
-$as_echo "$as_me: Added $LIB_OPENSSL to LD_LIBRARY_PATH" >&6;}
- fi
- fi
--
- fi
+ fi
diff --git a/package/openntpd/Makefile b/package/openntpd/Makefile
index f341614d1..5c8cf0fd5 100644
--- a/package/openntpd/Makefile
+++ b/package/openntpd/Makefile
@@ -5,7 +5,7 @@ include ${TOPDIR}/rules.mk
PKG_NAME:= openntpd
PKG_VERSION:= 3.9p1
-PKG_RELEASE:= 17
+PKG_RELEASE:= 18
PKG_MD5SUM:= afc34175f38d08867c1403d9008600b3
PKG_DESCR:= NTP server daemon
PKG_SECTION:= net
diff --git a/package/openntpd/files/ntpd.init b/package/openntpd/files/ntpd.init
index 42e068860..fd655e9cc 100644
--- a/package/openntpd/files/ntpd.init
+++ b/package/openntpd/files/ntpd.init
@@ -7,7 +7,7 @@
case $1 in
autostop) ;;
autostart)
- [[ $ntpd_flags = NO ]] && exit 0
+ test x"${ntpd:-NO}" = x"NO" && exit 0
exec sh $0 start
;;
start)
@@ -15,7 +15,7 @@ start)
/usr/sbin/ntpd $ntpd_flags
;;
stop)
- kill $(pidof ntpd|cut -d ' ' -f 3)
+ pkill ntpd
;;
restart)
sh $0 stop
diff --git a/package/openntpd/files/openntpd.postinst b/package/openntpd/files/openntpd.postinst
index 53bc8c387..c6d0bd33d 100644
--- a/package/openntpd/files/openntpd.postinst
+++ b/package/openntpd/files/openntpd.postinst
@@ -4,4 +4,5 @@ gid=$(get_next_gid)
add_group ntp $gid
add_user ntp $(get_next_uid) $gid /tmp/.ntp
add_service ntp 123/udp
-add_rcconf 'e.g. "-s"' ntpd_flags
+add_rcconf ntpd_flags ntpd_flags "-s"
+add_rcconf ntpd ntpd NO
diff --git a/package/radvd/Makefile b/package/radvd/Makefile
index e2d7ab460..6c3662b71 100644
--- a/package/radvd/Makefile
+++ b/package/radvd/Makefile
@@ -4,9 +4,9 @@
include ${TOPDIR}/rules.mk
PKG_NAME:= radvd
-PKG_VERSION:= 1.2
+PKG_VERSION:= 1.5
PKG_RELEASE:= 1
-PKG_MD5SUM:= 614876420d76cd2bb5bcb49760c8b9e3
+PKG_MD5SUM:= 78598b60ed9d64920739189c3dc0934d
PKG_DESCR:= Routing Advertisement Daemon for IPv6
PKG_SECTION:= net
PKG_DEPENDS:= kmod-ipv6
diff --git a/package/rpm/Makefile b/package/rpm/Makefile
index c7cf91c97..8526288be 100644
--- a/package/rpm/Makefile
+++ b/package/rpm/Makefile
@@ -4,10 +4,10 @@
include $(TOPDIR)/rules.mk
PKG_NAME:= rpm
-PKG_VERSION:= 4.7.0
+PKG_VERSION:= 4.7.2
PKG_RELEASE:= 1
-PKG_MD5SUM:= 74791d638c571ec79f06227d453a6a03
-PKG_DESCR:= GNU rpm
+PKG_MD5SUM:= 224715646325df4cd3904e3ac9e16186
+PKG_DESCR:= Package Manager
PKG_SECTION:= base
PKG_URL:= http://www.rpm.org
PKG_SITES:= http://rpm.org/releases/rpm-4.7.x/
diff --git a/package/strace/Makefile b/package/strace/Makefile
index 0eda1d6c9..44f56502a 100644
--- a/package/strace/Makefile
+++ b/package/strace/Makefile
@@ -4,9 +4,9 @@
include ${TOPDIR}/rules.mk
PKG_NAME:= strace
-PKG_VERSION:= 4.5.18
+PKG_VERSION:= 4.5.19
PKG_RELEASE:= 1
-PKG_MD5SUM:= e9449fcee97e6a8ed73934c883c870e0
+PKG_MD5SUM:= 2415e435d61e40315a298c80aced0cda
PKG_DESCR:= System call trace program
PKG_SECTION:= misc
PKG_SITES:= ${MASTER_SITE_SOURCEFORGE:=strace/}
diff --git a/package/strace/patches/patch-config_h_in b/package/strace/patches/patch-config_h_in
deleted file mode 100644
index ea06ade61..000000000
--- a/package/strace/patches/patch-config_h_in
+++ /dev/null
@@ -1,15 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/config.h.in 2008-08-28 23:36:28.000000000 +0200
-+++ strace-4.5.18/config.h.in 2009-01-02 21:24:05.414089778 +0100
-@@ -409,6 +409,11 @@
- /* Define for the AMD x86-64 architecture. */
- #undef X86_64
-
-+/* Define for the CRISv10 architecture. */
-+#undef CRISV10
-+
-+/* Define for the CRISv32 architecture. */
-+#undef CRISV32
- /* Enable GNU extensions on systems that have them. */
- #ifndef _GNU_SOURCE
- # undef _GNU_SOURCE
diff --git a/package/strace/patches/patch-configure b/package/strace/patches/patch-configure
deleted file mode 100644
index eadd57304..000000000
--- a/package/strace/patches/patch-configure
+++ /dev/null
@@ -1,26 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/configure 2008-08-28 23:36:06.000000000 +0200
-+++ strace-4.5.18/configure 2009-01-02 21:26:59.664979346 +0100
-@@ -2531,6 +2531,22 @@ cat >>confdefs.h <<\_ACEOF
- _ACEOF
-
- ;;
-+cris|crisv10)
-+ arch=crisv10
-+
-+cat >>confdefs.h <<\_ACEOF
-+#define CRISV10 1
-+_ACEOF
-+
-+ ;;
-+crisv32)
-+ arch=crisv32
-+
-+cat >>confdefs.h <<\_ACEOF
-+#define CRISV32 1
-+_ACEOF
-+
-+ ;;
- *)
- { echo "$as_me:$LINENO: result: NO!" >&5
- echo "${ECHO_T}NO!" >&6; }
diff --git a/package/strace/patches/patch-configure_ac b/package/strace/patches/patch-configure_ac
deleted file mode 100644
index 28abf1d1a..000000000
--- a/package/strace/patches/patch-configure_ac
+++ /dev/null
@@ -1,18 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/configure.ac 2008-08-28 23:15:56.000000000 +0200
-+++ strace-4.5.18/configure.ac 2009-01-02 21:24:05.482095139 +0100
-@@ -103,6 +103,14 @@ x86?64*)
- arch=x86_64
- AC_DEFINE([X86_64], 1, [Define for the AMD x86-64 architecture.])
- ;;
-+cris|crisv10)
-+ arch=crisv10
-+ AC_DEFINE([CRISV10], 1, [Define for the CRISv10 architecture.])
-+ ;;
-+crisv32)
-+ arch=crisv32
-+ AC_DEFINE([CRISV32], 1, [Define for the CRISv32 architecture.])
-+ ;;
- *)
- AC_MSG_RESULT([NO!])
- AC_MSG_ERROR([architecture $host_cpu is not supported by strace])
diff --git a/package/strace/patches/patch-linux_arm_syscallent_h b/package/strace/patches/patch-linux_arm_syscallent_h
deleted file mode 100644
index 387490267..000000000
--- a/package/strace/patches/patch-linux_arm_syscallent_h
+++ /dev/null
@@ -1,15 +0,0 @@
---- strace-4.5.18.orig/linux/arm/syscallent.h 2008-07-18 03:23:49.000000000 +0200
-+++ strace-4.5.18/linux/arm/syscallent.h 2009-11-22 21:27:48.660576873 +0100
-@@ -431,6 +431,7 @@
- { 5, 0, printargs, "SYS_398" }, /* 398 */
- { 5, 0, printargs, "SYS_399" }, /* 399 */
-
-+#ifndef __ARM_EABI__
- #if SYS_socket_subcall != 400
- #error fix me
- #endif
-@@ -481,3 +482,4 @@
- { 4, TI, sys_shmdt, "shmdt" }, /* 440 */
- { 4, TI, sys_shmget, "shmget" }, /* 441 */
- { 4, TI, sys_shmctl, "shmctl" }, /* 442 */
-+#endif
diff --git a/package/strace/patches/patch-net_c b/package/strace/patches/patch-net_c
new file mode 100644
index 000000000..a0dc31029
--- /dev/null
+++ b/package/strace/patches/patch-net_c
@@ -0,0 +1,10 @@
+--- strace-4.5.19.orig/net.c 2009-09-01 21:53:29.000000000 +0200
++++ strace-4.5.19/net.c 2009-12-03 23:35:36.000000000 +0100
+@@ -53,6 +53,7 @@
+ #include <net/if.h>
+ #if defined(LINUX)
+ #include <asm/types.h>
++#include <linux/netlink.h>
+ #if defined(__GLIBC__) && (__GLIBC__ >= 2) && (__GLIBC__ + __GLIBC_MINOR__ >= 3)
+ # include <netipx/ipx.h>
+ #else
diff --git a/package/strace/patches/patch-process_c b/package/strace/patches/patch-process_c
deleted file mode 100644
index 7309200d0..000000000
--- a/package/strace/patches/patch-process_c
+++ /dev/null
@@ -1,109 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/process.c 2008-07-18 04:16:47.000000000 +0200
-+++ strace-4.5.18/process.c 2009-01-02 21:24:05.490094969 +0100
-@@ -584,7 +584,7 @@ extern void print_ldt_entry();
- # define ARG_PTID (known_scno(tcp) == SYS_clone2 ? 3 : 2)
- # define ARG_CTID (known_scno(tcp) == SYS_clone2 ? 4 : 3)
- # define ARG_TLS (known_scno(tcp) == SYS_clone2 ? 5 : 4)
--# elif defined S390 || defined S390X
-+# elif defined S390 || defined S390X || defined CRISV10 || defined CRISV32
- # define ARG_STACK 0
- # define ARG_FLAGS 1
- # define ARG_PTID 2
-@@ -740,6 +740,10 @@ int new;
- 0x100000 | new) < 0)
- return -1;
- return 0;
-+#elif defined(CRISV10) || defined(CRISV32)
-+ if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
-+ return -1;
-+ return 0;
- #elif defined(ARM)
- /* Some kernels support this, some (pre-2.6.16 or so) don't. */
- # ifndef PTRACE_SET_SYSCALL
-@@ -3003,7 +3007,77 @@ const struct xlat struct_user_offsets[]
- { 69, "fpcsr" },
- { 70, "fpeir" },
- #endif
-+#ifdef CRISV10
-+ { 4*PT_FRAMETYPE, "4*PT_FRAMETYPE" },
-+ { 4*PT_ORIG_R10, "4*PT_ORIG_R10" },
-+ { 4*PT_R13, "4*PT_R13" },
-+ { 4*PT_R12, "4*PT_R12" },
-+ { 4*PT_R11, "4*PT_R11" },
-+ { 4*PT_R10, "4*PT_R10" },
-+ { 4*PT_R9, "4*PT_R9" },
-+ { 4*PT_R8, "4*PT_R8" },
-+ { 4*PT_R7, "4*PT_R7" },
-+ { 4*PT_R6, "4*PT_R6" },
-+ { 4*PT_R5, "4*PT_R5" },
-+ { 4*PT_R4, "4*PT_R4" },
-+ { 4*PT_R3, "4*PT_R3" },
-+ { 4*PT_R2, "4*PT_R2" },
-+ { 4*PT_R1, "4*PT_R1" },
-+ { 4*PT_R0, "4*PT_R0" },
-+ { 4*PT_MOF, "4*PT_MOF" },
-+ { 4*PT_DCCR, "4*PT_DCCR" },
-+ { 4*PT_SRP, "4*PT_SRP" },
-+ { 4*PT_IRP, "4*PT_IRP" },
-+ { 4*PT_CSRINSTR, "4*PT_CSRINSTR" },
-+ { 4*PT_CSRADDR, "4*PT_CSRADDR" },
-+ { 4*PT_CSRDATA, "4*PT_CSRDATA" },
-+ { 4*PT_USP, "4*PT_USP" },
-+#endif
-+#ifdef CRISV32
-+ { 4*PT_ORIG_R10, "4*PT_ORIG_R10" },
-+ { 4*PT_R0, "4*PT_R0" },
-+ { 4*PT_R1, "4*PT_R1" },
-+ { 4*PT_R2, "4*PT_R2" },
-+ { 4*PT_R3, "4*PT_R3" },
-+ { 4*PT_R4, "4*PT_R4" },
-+ { 4*PT_R5, "4*PT_R5" },
-+ { 4*PT_R6, "4*PT_R6" },
-+ { 4*PT_R7, "4*PT_R7" },
-+ { 4*PT_R8, "4*PT_R8" },
-+ { 4*PT_R9, "4*PT_R9" },
-+ { 4*PT_R10, "4*PT_R10" },
-+ { 4*PT_R11, "4*PT_R11" },
-+ { 4*PT_R12, "4*PT_R12" },
-+ { 4*PT_R13, "4*PT_R13" },
-+ { 4*PT_ACR, "4*PT_ACR" },
-+ { 4*PT_SRS, "4*PT_SRS" },
-+ { 4*PT_MOF, "4*PT_MOF" },
-+ { 4*PT_SPC, "4*PT_SPC" },
-+ { 4*PT_CCS, "4*PT_CCS" },
-+ { 4*PT_SRP, "4*PT_SRP" },
-+ { 4*PT_ERP, "4*PT_ERP" },
-+ { 4*PT_EXS, "4*PT_EXS" },
-+ { 4*PT_EDA, "4*PT_EDA" },
-+ { 4*PT_USP, "4*PT_USP" },
-+ { 4*PT_PPC, "4*PT_PPC" },
-+ { 4*PT_BP_CTRL, "4*PT_BP_CTRL" },
-+ { 4*PT_BP+4, "4*PT_BP+4" },
-+ { 4*PT_BP+8, "4*PT_BP+8" },
-+ { 4*PT_BP+12, "4*PT_BP+12" },
-+ { 4*PT_BP+16, "4*PT_BP+16" },
-+ { 4*PT_BP+20, "4*PT_BP+20" },
-+ { 4*PT_BP+24, "4*PT_BP+24" },
-+ { 4*PT_BP+28, "4*PT_BP+28" },
-+ { 4*PT_BP+32, "4*PT_BP+32" },
-+ { 4*PT_BP+36, "4*PT_BP+36" },
-+ { 4*PT_BP+40, "4*PT_BP+40" },
-+ { 4*PT_BP+44, "4*PT_BP+44" },
-+ { 4*PT_BP+48, "4*PT_BP+48" },
-+ { 4*PT_BP+52, "4*PT_BP+52" },
-+ { 4*PT_BP+56, "4*PT_BP+56" },
-+#endif
-
-+#if !defined(CRISV10) && !defined(CRISV32)
- #if !defined(S390) && !defined(S390X) && !defined(MIPS) && !defined(SPARC64)
- { uoff(u_fpvalid), "offsetof(struct user, u_fpvalid)" },
- #endif
-@@ -3041,6 +3115,7 @@ const struct xlat struct_user_offsets[]
- #if defined(I386) || defined(X86_64)
- { uoff(u_debugreg), "offsetof(struct user, u_debugreg)" },
- #endif /* I386 */
-+#endif /* !CRISV10/!CRISV32 */
- #endif /* !IA64 */
- #endif /* !ALPHA */
- #endif /* !POWERPC/!SPARC */
diff --git a/package/strace/patches/patch-signal_c b/package/strace/patches/patch-signal_c
deleted file mode 100644
index 76795fbf6..000000000
--- a/package/strace/patches/patch-signal_c
+++ /dev/null
@@ -1,42 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/signal.c 2008-08-20 03:59:40.000000000 +0200
-+++ strace-4.5.18/signal.c 2009-01-02 21:24:05.502094888 +0100
-@@ -1485,9 +1485,38 @@ struct tcb *tcp;
- }
- return 0;
- #else
-+#if defined(CRISV10) || defined(CRISV32)
-+ struct sigcontext sc;
-+
-+ if (entering(tcp)) {
-+ long regs[PT_MAX+1];
-+
-+ tcp->u_arg[0] = 0;
-+
-+ if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
-+ perror("sigreturn: PTRACE_GETREGS");
-+ return 0;
-+ }
-+ if (umove(tcp, regs[PT_USP], &sc) < 0)
-+ return 0;
-+ tcp->u_arg[0] = 1;
-+ tcp->u_arg[1] = sc.oldmask;
-+ } else {
-+ sigset_t sigm;
-+
-+ long_to_sigset(tcp->u_arg[1], &sigm);
-+ tcp->u_rval = tcp->u_error = 0;
-+ if (tcp->u_arg[0] == 0)
-+ return 0;
-+ tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
-+ return RVAL_NONE | RVAL_STR;
-+ }
-+ return 0;
-+#else
- #warning No sys_sigreturn() for this architecture
- #warning (no problem, just a reminder :-)
- return 0;
-+#endif /* !CRISV10/!CRISV32 */
- #endif /* MIPS */
- #endif /* LINUX_MIPSN32 || LINUX_MIPSN64 */
- #endif /* SPARC || SPARC64 */
diff --git a/package/strace/patches/patch-syscall_c b/package/strace/patches/patch-syscall_c
deleted file mode 100644
index 700d9be09..000000000
--- a/package/strace/patches/patch-syscall_c
+++ /dev/null
@@ -1,81 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/syscall.c 2008-08-25 05:16:26.000000000 +0200
-+++ strace-4.5.18/syscall.c 2009-01-02 21:24:05.514097112 +0100
-@@ -772,6 +772,8 @@ internal_syscall(struct tcb *tcp)
- static long r9;
- #elif defined(X86_64)
- static long rax;
-+#elif defined(CRISV10) || defined(CRISV32)
-+ static long r10;
- #endif
- #endif /* LINUX */
- #ifdef FREEBSD
-@@ -1273,7 +1275,10 @@ struct tcb *tcp;
- return 0;
- }
- }
--#endif /* SH64 */
-+#elif defined(CRISV10) || defined(CRISV32)
-+ if (upeek(pid, 4*PT_R9, &scno) < 0)
-+ return -1;
-+#endif /* CRISV10/CRISV32 */
- #endif /* LINUX */
- #ifdef SUNOS4
- if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
-@@ -1468,6 +1473,14 @@ struct tcb *tcp;
- fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8);
- return 0;
- }
-+#elif defined(CRISV10) || defined(CRISV32)
-+ if (upeek(pid, 4*PT_R10, &r10) < 0)
-+ return -1;
-+ if (r10 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
-+ if (debug)
-+ fprintf(stderr, "stray syscall exit: r10 = %ld\n", r10);
-+ return 0;
-+ }
- #endif
- #endif /* LINUX */
- return 1;
-@@ -1649,6 +1662,17 @@ struct tcb *tcp;
- tcp->u_rval = r9;
- u_error = 0;
- }
-+#else
-+#if defined(CRISV10) || defined(CRISV32)
-+ if (r10 && (unsigned) -r10 < nerrnos) {
-+ tcp->u_rval = -1;
-+ u_error = -r10;
-+ }
-+ else {
-+ tcp->u_rval = r10;
-+ u_error = 0;
-+ }
-+#endif /* CRISV10/CRISV32 */
- #endif /* SH64 */
- #endif /* SH */
- #endif /* HPPA */
-@@ -2169,6 +2193,23 @@ struct tcb *tcp;
- return -1;
- }
- }
-+#elif defined(CRISV10) || defined(CRISV32)
-+ {
-+ int i;
-+ static const int crisregs[] = {
-+ 4*PT_ORIG_R10, 4*PT_R11, 4*PT_R12,
-+ 4*PT_R13, 4*PT_MOF, 4*PT_SRP
-+ };
-+
-+ if (tcp->scno >= 0 && tcp->scno < nsyscalls)
-+ tcp->u_nargs = sysent[tcp->scno].nargs;
-+ else
-+ tcp->u_nargs = 0;
-+ for (i = 0; i < tcp->u_nargs; i++) {
-+ if (upeek(pid, crisregs[i], &tcp->u_arg[i]) < 0)
-+ return -1;
-+ }
-+ }
- #else /* Other architecture (like i386) (32bits specific) */
- {
- int i;
diff --git a/package/strace/patches/patch-system_c b/package/strace/patches/patch-system_c
deleted file mode 100644
index 85ad4a434..000000000
--- a/package/strace/patches/patch-system_c
+++ /dev/null
@@ -1,11 +0,0 @@
---- strace-4.5.18.orig/system.c 2007-01-17 00:22:36.000000000 +0100
-+++ strace-4.5.18/system.c 2009-11-22 21:29:57.404591477 +0100
-@@ -70,7 +70,7 @@
- #include <linux/capability.h>
- #endif
-
--#ifdef SYS_cacheflush
-+#if defined SYS_cacheflush && !defined ARM
- #include <asm/cachectl.h>
- #endif
-
diff --git a/package/strace/patches/patch-util_c b/package/strace/patches/patch-util_c
deleted file mode 100644
index 17112f30e..000000000
--- a/package/strace/patches/patch-util_c
+++ /dev/null
@@ -1,53 +0,0 @@
-$Id: update-patches 24 2008-08-31 14:56:13Z wbx $
---- strace-4.5.18.orig/util.c 2008-08-19 06:47:51.000000000 +0200
-+++ strace-4.5.18/util.c 2009-01-02 21:24:05.530098238 +0100
-@@ -1097,6 +1097,12 @@ struct tcb *tcp;
- #elif defined(SH64)
- if (upeek(tcp->pid, REG_PC ,&pc) < 0)
- return -1;
-+#elif defined(CRISV10)
-+ if (upeek(tcp->pid, 4*PT_IRP, &pc) < 0)
-+ return -1;
-+#elif defined(CRISV32)
-+ if (upeek(tcp->pid, 4*PT_ERP, &pc) < 0)
-+ return -1;
- #endif
- return pc;
- #endif /* LINUX */
-@@ -1245,6 +1251,22 @@ struct tcb *tcp;
- return;
- }
- tprintf("[%08lx] ", pc);
-+#elif defined(CRISV10)
-+ long pc;
-+
-+ if (upeek(tcp->pid, 4*PT_IRP, &pc) < 0) {
-+ PRINTBADPC;
-+ return;
-+ }
-+ tprintf("[%08lx] ", (unsigned long)pc);
-+#elif defined(CRISV32)
-+ long pc;
-+
-+ if (upeek(tcp->pid, 4*PT_ERP, &pc) < 0) {
-+ PRINTBADPC;
-+ return;
-+ }
-+ tprintf("[%08lx] ", (unsigned long)pc);
- #endif /* !architecture */
- #endif /* LINUX */
-
-@@ -1444,6 +1466,13 @@ typedef struct regs arg_setup_state;
- # define arg0_offset (REG_OFFSET+16)
- # define arg1_offset (REG_OFFSET+24)
- # define restore_arg0(tcp, state, val) 0
-+# elif defined CRISV10 || defined CRISV32
-+# define arg0_offset (4*PT_R11)
-+# define arg1_offset (4*PT_ORIG_R10)
-+# define restore_arg0(tcp, state, val) 0
-+# define restore_arg1(tcp, state, val) 0
-+# define arg0_index 1
-+# define arg1_index 0
- # else
- # define arg0_offset 0
- # define arg1_offset 4
diff --git a/package/tor/Makefile b/package/tor/Makefile
index cf952da0d..4eebf0243 100644
--- a/package/tor/Makefile
+++ b/package/tor/Makefile
@@ -4,9 +4,9 @@
include ${TOPDIR}/rules.mk
PKG_NAME:= tor
-PKG_VERSION:= 0.1.1.26
-PKG_RELEASE:= 9
-PKG_MD5SUM:= 0667df7a1f670bee5163b607aea172ba
+PKG_VERSION:= 0.2.1.20
+PKG_RELEASE:= 1
+PKG_MD5SUM:= 0d62ee2332fdd95de43debac7435df19
PKG_DESCR:= An anonymous Internet communication system
PKG_SECTION:= net
PKG_DEPENDS:= libevent libopenssl libpthread zlib
diff --git a/package/tor/patches/patch-configure b/package/tor/patches/patch-configure
deleted file mode 100644
index b87f3dde8..000000000
--- a/package/tor/patches/patch-configure
+++ /dev/null
@@ -1,12 +0,0 @@
-$Id$
---- tor-0.1.1.26.orig/configure 2006-12-15 01:12:11.000000000 +0100
-+++ tor-0.1.1.26/configure 2007-02-17 21:46:29.000000000 +0100
-@@ -15193,7 +15193,7 @@ _ACEOF
- # Set CFLAGS _after_ all the above checks, since our warnings are stricter
- # than autoconf's macros like.
- if test $ac_cv_c_compiler_gnu = yes; then
-- CFLAGS="$CFLAGS -Wall -g -O2"
-+ CFLAGS="$CFLAGS -Wall"
- else
- CFLAGS="$CFLAGS -g -O"
- fi
diff --git a/package/tor/patches/patch-contrib_suse_tor_sh b/package/tor/patches/patch-contrib_suse_tor_sh
new file mode 100644
index 000000000..2bc55db33
--- /dev/null
+++ b/package/tor/patches/patch-contrib_suse_tor_sh
@@ -0,0 +1,11 @@
+--- tor-0.2.1.20.orig/contrib/suse/tor.sh 2009-10-15 18:16:23.000000000 +0200
++++ tor-0.2.1.20/contrib/suse/tor.sh 2009-12-03 23:45:45.000000000 +0100
+@@ -43,7 +43,7 @@ rc_reset
+ # Increase open file descriptors a reasonable amount
+ ulimit -n 8192
+
+-TORCTL=/usr/local/bin/torctl
++TORCTL=/usr/bin/torctl
+
+ # torctl will use these environment variables
+ TORUSER=_tor
diff --git a/package/tor/patches/patch-contrib_tor_sh b/package/tor/patches/patch-contrib_tor_sh
new file mode 100644
index 000000000..4f953b0fd
--- /dev/null
+++ b/package/tor/patches/patch-contrib_tor_sh
@@ -0,0 +1,11 @@
+--- tor-0.2.1.20.orig/contrib/tor.sh 2009-10-15 18:16:22.000000000 +0200
++++ tor-0.2.1.20/contrib/tor.sh 2009-12-03 23:45:44.000000000 +0100
+@@ -26,7 +26,7 @@ fi
+ # Increase open file descriptors a reasonable amount
+ ulimit -n 8192
+
+-TORCTL=/usr/local/bin/torctl
++TORCTL=/usr/bin/torctl
+
+ # torctl will use these environment variables
+ TORUSER=_tor
diff --git a/package/tor/patches/patch-contrib_torctl b/package/tor/patches/patch-contrib_torctl
new file mode 100644
index 000000000..b531711db
--- /dev/null
+++ b/package/tor/patches/patch-contrib_torctl
@@ -0,0 +1,27 @@
+--- tor-0.2.1.20.orig/contrib/torctl 2009-10-15 18:16:22.000000000 +0200
++++ tor-0.2.1.20/contrib/torctl 2009-12-03 23:45:44.000000000 +0100
+@@ -24,19 +24,19 @@
+ EXEC=tor
+ #
+ # the path to your binary, including options if necessary
+-TORBIN="/usr/local/bin/$EXEC"
++TORBIN="/usr/bin/$EXEC"
+ #
+ # the path to the configuration file
+-TORCONF="/usr/local/etc/tor/torrc"
++TORCONF="/etc/tor/torrc"
+ #
+ # the path to your PID file
+-PIDFILE="/usr/local/var/run/tor/tor.pid"
++PIDFILE="/var/run/tor/tor.pid"
+ #
+ # The path to the log file
+-LOGFILE="/usr/local/var/log/tor/tor.log"
++LOGFILE="/var/log/tor/tor.log"
+ #
+ # The path to the datadirectory
+-TORDATA="/usr/local/var/lib/tor"
++TORDATA="/var/lib/tor"
+ #
+ TORARGS="--pidfile $PIDFILE --log \"notice file $LOGFILE\" --runasdaemon 1"
+ TORARGS="$TORARGS --datadirectory $TORDATA"
diff --git a/package/tor/patches/patch-src_common_util_h b/package/tor/patches/patch-src_common_util_h
index 4052d16f1..f6607ffc1 100644
--- a/package/tor/patches/patch-src_common_util_h
+++ b/package/tor/patches/patch-src_common_util_h
@@ -1,12 +1,23 @@
-$Id$
---- tor-0.1.1.26.orig/src/common/util.h 2006-09-24 19:47:57.000000000 +0200
-+++ tor-0.1.1.26/src/common/util.h 2007-02-17 23:09:46.000000000 +0100
-@@ -36,7 +36,7 @@
- * And I'm not just saying that because some of our asserts check
- * security-critical properties.
- */
+--- tor-0.2.1.20.orig/src/common/util.h 2009-06-19 08:13:53.000000000 +0200
++++ tor-0.2.1.20/src/common/util.h 2009-12-03 23:47:21.000000000 +0100
+@@ -24,20 +24,6 @@
+ #define O_TEXT 0
+ #endif
+
+-/* Replace assert() with a variant that sends failures to the log before
+- * calling assert() normally.
+- */
+-#ifdef NDEBUG
+-/* Nobody should ever want to build with NDEBUG set. 99% of our asserts will
+- * be outside the critical path anyway, so it's silly to disable bug-checking
+- * throughout the entire program just because a few asserts are slowing you
+- * down. Profile, optimize the critical path, and keep debugging on.
+- *
+- * And I'm not just saying that because some of our asserts check
+- * security-critical properties.
+- */
-#error "Sorry; we don't support building with NDEBUG."
-+#define tor_assert(expr) ((void)(0))
- #else
- #define tor_assert(expr) do { \
- if (!(expr)) { \
+-#endif
+
+ /** Like assert(3), but send assertion failures to the log as well as to
+ * stderr. */
diff --git a/package/tor/patches/patch-src_or_eventdns_c b/package/tor/patches/patch-src_or_eventdns_c
new file mode 100644
index 000000000..138469f09
--- /dev/null
+++ b/package/tor/patches/patch-src_or_eventdns_c
@@ -0,0 +1,18 @@
+--- tor-0.2.1.20.orig/src/or/eventdns.c 2009-09-17 08:02:18.000000000 +0200
++++ tor-0.2.1.20/src/or/eventdns.c 2009-12-03 23:49:27.000000000 +0100
+@@ -375,7 +375,6 @@ error_is_eagain(int err)
+ #define TOLOWER(c) TOR_TOLOWER(c)
+ #define TOUPPER(c) TOR_TOUPPER(c)
+
+-#ifndef NDEBUG
+ static const char *
+ debug_ntoa(u32 address)
+ {
+@@ -404,7 +403,6 @@ debug_ntop(const struct sockaddr *sa)
+ }
+ return "<unknown>";
+ }
+-#endif
+
+ static evdns_debug_log_fn_type evdns_log_fn = NULL;
+
diff --git a/package/tor/patches/patch-tor_spec b/package/tor/patches/patch-tor_spec
new file mode 100644
index 000000000..a4bc4adaa
--- /dev/null
+++ b/package/tor/patches/patch-tor_spec
@@ -0,0 +1,11 @@
+--- tor-0.2.1.20.orig/tor.spec 2009-10-15 18:16:22.000000000 +0200
++++ tor-0.2.1.20/tor.spec 2009-12-03 23:45:44.000000000 +0100
+@@ -101,7 +101,7 @@
+ %endif
+
+ %if %{!?_localstatedir:1}%{?_localstatedir:0}
+-%define _localstatedir /usr/local/var
++%define _localstatedir /var
+ %endif
+
+ ## Package information
diff --git a/package/udev/Makefile b/package/udev/Makefile
index dd7a8c2fe..90ffefe66 100644
--- a/package/udev/Makefile
+++ b/package/udev/Makefile
@@ -19,6 +19,9 @@ include ${TOPDIR}/mk/package.mk
$(eval $(call PKG_template,UDEV,${PKG_NAME},${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION}))
CONFIGURE_STYLE:= gnu
+CONFIGURE_ARGS+= --disable-extras \
+ --disable-logging \
+ --disable-introspection
BUILD_STYLE:= auto
INSTALL_STYLE:= auto
diff --git a/rules.mk b/rules.mk
index 8d1d5e914..390b05d0a 100644
--- a/rules.mk
+++ b/rules.mk
@@ -42,8 +42,3 @@ HOSTLDFLAGS?=
TARGET_CFLAGS:= $(strip -fwrapv -fno-ident ${TARGET_CFLAGS})
TARGET_CC:= $(strip ${TARGET_CC})
TARGET_CXX:= $(strip ${TARGET_CXX})
-
-#ifneq (${show},)
-#_show:
-# @echo '$($(show))'
-#endif
diff --git a/scripts/scan-pkgs.sh b/scripts/scan-pkgs.sh
index b1292f7e2..4118383d5 100644
--- a/scripts/scan-pkgs.sh
+++ b/scripts/scan-pkgs.sh
@@ -31,9 +31,6 @@ if [[ -n $ADK_NATIVE ]];then
if [[ -n $ADK_TARGET_PACKAGE_RPM ]]; then
NEED_RPM="$NEED_RPM rpm"
fi
-fi
-
-if [[ -n $ADK_NATIVE ]];then
if [[ -n $ADK_PACKAGE_SQUID ]]; then
NEED_GXX="$NEED_GXX squid"
fi
@@ -86,7 +83,6 @@ if [[ -n $ADK_PACKAGE_LIBPCAP ]]; then
NEED_BISON="$NEED_BISON libpcap"
fi
-
if [[ -n $NEED_GETTEXT ]]; then
if ! which xgettext >/dev/null 2>&1; then
echo >&2 You need gettext to build $NEED_GETTEXT
@@ -190,9 +186,4 @@ if [[ -n $NEED_FLEX ]]; then
fi
fi
-#if [[ -n $ADK_COMPILE_MYSQL && $OStype != Linux ]]; then
-# echo >&2 mySQL does not build on non-GNU/Linux.
-# out=1
-#fi
-
exit $out
diff --git a/target/Config.in b/target/Config.in
index 52757e37c..420bd7b35 100644
--- a/target/Config.in
+++ b/target/Config.in
@@ -419,6 +419,7 @@ config ADK_LINUX_MIPS_RB532
select ADK_KERNEL_BLK_DEV_SD
help
Support for Mikrotik RB532.
+
endchoice
choice
diff --git a/target/alix1c/target.mk b/target/alix1c/target.mk
index 18f3c923e..9f958a84b 100644
--- a/target/alix1c/target.mk
+++ b/target/alix1c/target.mk
@@ -1,7 +1,7 @@
ARCH:= x86
CPU_ARCH:= i586
-KERNEL_VERSION:= 2.6.31.5
+KERNEL_VERSION:= 2.6.32
KERNEL_RELEASE:= 1
-KERNEL_MD5SUM:= 926bff46d24e2f303e4ee92234e394d8
+KERNEL_MD5SUM:= 260551284ac224c3a43c4adac7df4879
TARGET_OPTIMIZATION:= -Os -pipe
TARGET_CFLAGS_ARCH:= -march=geode
diff --git a/target/linux/config/Config.in.block b/target/linux/config/Config.in.block
index cd4781b15..cedaa941b 100644
--- a/target/linux/config/Config.in.block
+++ b/target/linux/config/Config.in.block
@@ -65,7 +65,7 @@ config ADK_KPACKAGE_KMOD_SATA_AHCI
tristate
select ADK_KERNEL_BLOCK
select ADK_KERNEL_ATA
- select ADK_KPACKAGE_KMOD_BLK_DEV_SD
+ select ADK_KERNEL_BLK_DEV_SD
depends on !ADK_KERNEL_SATA_AHCI
default n
help
@@ -188,7 +188,7 @@ config ADK_KPACKAGE_KMOD_SCSI
config ADK_KPACKAGE_KMOD_BLK_DEV_SD
prompt "kmod-scsi-disk.................... SCSI disk support"
- depends on !ADK_KERNEL_SCSI
+ depends on !ADK_KERNEL_BLK_DEV_SD
depends on ADK_KPACKAGE_KMOD_SCSI
tristate
help
diff --git a/target/linux/config/Config.in.netdevice b/target/linux/config/Config.in.netdevice
index a894c2114..2ab36a10f 100644
--- a/target/linux/config/Config.in.netdevice
+++ b/target/linux/config/Config.in.netdevice
@@ -109,9 +109,18 @@ config ADK_MOD_KERNEL_CFG80211
tristate
default n
+config ADK_MOD_KERNEL_LIB80211
+ tristate
+ default n
+
+config ADK_KERNEL_ATH_COMMON
+ tristate
+ default n
+
config ADK_MOD_KERNEL_MAC80211
tristate
select ADK_MOD_KERNEL_CFG80211
+ select ADK_MOD_KERNEL_LIB80211
select ADK_KPACKAGE_KMOD_CRYPTO_AES
select ADK_KPACKAGE_KMOD_CRYPTO_ECB
select ADK_KPACKAGE_KMOD_CRYPTO_ARC4
@@ -128,6 +137,7 @@ config ADK_KPACKAGE_KMOD_MAC80211
prompt "kmod-mac80211................... mac80211 softmac"
tristate
select ADK_MOD_KERNEL_CFG80211
+ select ADK_MOD_KERNEL_LIB80211
select ADK_KPACKAGE_KMOD_CRYPTO_AES
select ADK_KPACKAGE_KMOD_CRYPTO_ECB
select ADK_KPACKAGE_KMOD_CRYPTO_ARC4
@@ -141,6 +151,7 @@ config ADK_KPACKAGE_KMOD_ATH5K
prompt "kmod-mac80211-ath5k............ Atheros 5xxx wireless cards"
tristate
select ADK_KERNEL_MAC80211_LEDS
+ select ADK_KERNEL_ATH_COMMON
depends on ADK_KPACKAGE_KMOD_MAC80211
default n
help
diff --git a/target/linux/config/Config.in.netfilter b/target/linux/config/Config.in.netfilter
index fc3c2682f..ef2e1285a 100644
--- a/target/linux/config/Config.in.netfilter
+++ b/target/linux/config/Config.in.netfilter
@@ -417,13 +417,6 @@ config ADK_KPACKAGE_KMOD_IP_NF_TARGET_NETMAP
address part intact. It is similar to Fast NAT, except that
Netfilter's connection tracking doesn't work well with Fast NAT.
-config ADK_KPACKAGE_KMOD_IP_NF_TARGET_SAME
- tristate 'SAME target support'
- depends on ADK_KPACKAGE_KMOD_NF_NAT
- help
- This option adds a `SAME' target, which works like the standard SNAT
- target, but attempts to give clients the same IP for all connections.
-
config ADK_KPACKAGE_KMOD_IP_NF_MANGLE
tristate 'Packet mangling'
depends on ADK_KPACKAGE_KMOD_NF_NAT
diff --git a/target/linux/patches/2.6.30.5/aufs2-2.6.30.patch b/target/linux/patches/2.6.30.5/aufs2-2.6.30.patch
deleted file mode 100644
index 212ab427f..000000000
--- a/target/linux/patches/2.6.30.5/aufs2-2.6.30.patch
+++ /dev/null
@@ -1,24453 +0,0 @@
-diff -Naurp linux-2.6.30/Documentation/ABI/testing/debugfs-aufs linux-2.6.30.patched/Documentation/ABI/testing/debugfs-aufs
---- linux-2.6.30/Documentation/ABI/testing/debugfs-aufs 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/Documentation/ABI/testing/debugfs-aufs 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/Documentation/ABI/testing/sysfs-aufs linux-2.6.30.patched/Documentation/ABI/testing/sysfs-aufs
---- linux-2.6.30/Documentation/ABI/testing/sysfs-aufs 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/Documentation/ABI/testing/sysfs-aufs 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/aufs.h linux-2.6.30.patched/fs/aufs/aufs.h
---- linux-2.6.30/fs/aufs/aufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/aufs.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/branch.c linux-2.6.30.patched/fs/aufs/branch.c
---- linux-2.6.30/fs/aufs/branch.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/branch.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/branch.h linux-2.6.30.patched/fs/aufs/branch.h
---- linux-2.6.30/fs/aufs/branch.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/branch.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/cpup.c linux-2.6.30.patched/fs/aufs/cpup.c
---- linux-2.6.30/fs/aufs/cpup.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/cpup.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/cpup.h linux-2.6.30.patched/fs/aufs/cpup.h
---- linux-2.6.30/fs/aufs/cpup.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/cpup.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dbgaufs.c linux-2.6.30.patched/fs/aufs/dbgaufs.c
---- linux-2.6.30/fs/aufs/dbgaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dbgaufs.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dbgaufs.h linux-2.6.30.patched/fs/aufs/dbgaufs.h
---- linux-2.6.30/fs/aufs/dbgaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dbgaufs.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dcsub.c linux-2.6.30.patched/fs/aufs/dcsub.c
---- linux-2.6.30/fs/aufs/dcsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dcsub.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dcsub.h linux-2.6.30.patched/fs/aufs/dcsub.h
---- linux-2.6.30/fs/aufs/dcsub.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dcsub.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/debug.c linux-2.6.30.patched/fs/aufs/debug.c
---- linux-2.6.30/fs/aufs/debug.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/debug.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/debug.h linux-2.6.30.patched/fs/aufs/debug.h
---- linux-2.6.30/fs/aufs/debug.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/debug.h 2009-08-23 17:24:54.001941277 +0200
-@@ -0,0 +1,260 @@
-+/*
-+ * 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 <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 -Naurp linux-2.6.30/fs/aufs/dentry.c linux-2.6.30.patched/fs/aufs/dentry.c
---- linux-2.6.30/fs/aufs/dentry.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dentry.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dentry.h linux-2.6.30.patched/fs/aufs/dentry.h
---- linux-2.6.30/fs/aufs/dentry.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dentry.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dinfo.c linux-2.6.30.patched/fs/aufs/dinfo.c
---- linux-2.6.30/fs/aufs/dinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dinfo.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dir.c linux-2.6.30.patched/fs/aufs/dir.c
---- linux-2.6.30/fs/aufs/dir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dir.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/dir.h linux-2.6.30.patched/fs/aufs/dir.h
---- linux-2.6.30/fs/aufs/dir.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/dir.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/export.c linux-2.6.30.patched/fs/aufs/export.c
---- linux-2.6.30/fs/aufs/export.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/export.c 2009-08-23 17:24:54.005965979 +0200
-@@ -0,0 +1,745 @@
-+/*
-+ * 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/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 -Naurp linux-2.6.30/fs/aufs/file.c linux-2.6.30.patched/fs/aufs/file.c
---- linux-2.6.30/fs/aufs/file.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/file.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/file.h linux-2.6.30.patched/fs/aufs/file.h
---- linux-2.6.30/fs/aufs/file.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/file.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/finfo.c linux-2.6.30.patched/fs/aufs/finfo.c
---- linux-2.6.30/fs/aufs/finfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/finfo.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/f_op.c linux-2.6.30.patched/fs/aufs/f_op.c
---- linux-2.6.30/fs/aufs/f_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/f_op.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/fstype.h linux-2.6.30.patched/fs/aufs/fstype.h
---- linux-2.6.30/fs/aufs/fstype.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/fstype.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/hinotify.c linux-2.6.30.patched/fs/aufs/hinotify.c
---- linux-2.6.30/fs/aufs/hinotify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/hinotify.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/iinfo.c linux-2.6.30.patched/fs/aufs/iinfo.c
---- linux-2.6.30/fs/aufs/iinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/iinfo.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/inode.c linux-2.6.30.patched/fs/aufs/inode.c
---- linux-2.6.30/fs/aufs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/inode.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/inode.h linux-2.6.30.patched/fs/aufs/inode.h
---- linux-2.6.30/fs/aufs/inode.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/inode.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/ioctl.c linux-2.6.30.patched/fs/aufs/ioctl.c
---- linux-2.6.30/fs/aufs/ioctl.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/ioctl.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/i_op_add.c linux-2.6.30.patched/fs/aufs/i_op_add.c
---- linux-2.6.30/fs/aufs/i_op_add.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/i_op_add.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/i_op.c linux-2.6.30.patched/fs/aufs/i_op.c
---- linux-2.6.30/fs/aufs/i_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/i_op.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/i_op_del.c linux-2.6.30.patched/fs/aufs/i_op_del.c
---- linux-2.6.30/fs/aufs/i_op_del.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/i_op_del.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/i_op_ren.c linux-2.6.30.patched/fs/aufs/i_op_ren.c
---- linux-2.6.30/fs/aufs/i_op_ren.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/i_op_ren.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/Kconfig linux-2.6.30.patched/fs/aufs/Kconfig
---- linux-2.6.30/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/Kconfig 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/loop.c linux-2.6.30.patched/fs/aufs/loop.c
---- linux-2.6.30/fs/aufs/loop.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/loop.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/loop.h linux-2.6.30.patched/fs/aufs/loop.h
---- linux-2.6.30/fs/aufs/loop.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/loop.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/magic.mk linux-2.6.30.patched/fs/aufs/magic.mk
---- linux-2.6.30/fs/aufs/magic.mk 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/magic.mk 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/Makefile linux-2.6.30.patched/fs/aufs/Makefile
---- linux-2.6.30/fs/aufs/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/Makefile 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/module.c linux-2.6.30.patched/fs/aufs/module.c
---- linux-2.6.30/fs/aufs/module.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/module.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/module.h linux-2.6.30.patched/fs/aufs/module.h
---- linux-2.6.30/fs/aufs/module.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/module.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/opts.c linux-2.6.30.patched/fs/aufs/opts.c
---- linux-2.6.30/fs/aufs/opts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/opts.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/opts.h linux-2.6.30.patched/fs/aufs/opts.h
---- linux-2.6.30/fs/aufs/opts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/opts.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/plink.c linux-2.6.30.patched/fs/aufs/plink.c
---- linux-2.6.30/fs/aufs/plink.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/plink.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/poll.c linux-2.6.30.patched/fs/aufs/poll.c
---- linux-2.6.30/fs/aufs/poll.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/poll.c 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/rwsem.h linux-2.6.30.patched/fs/aufs/rwsem.h
---- linux-2.6.30/fs/aufs/rwsem.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/rwsem.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/sbinfo.c linux-2.6.30.patched/fs/aufs/sbinfo.c
---- linux-2.6.30/fs/aufs/sbinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/sbinfo.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/spl.h linux-2.6.30.patched/fs/aufs/spl.h
---- linux-2.6.30/fs/aufs/spl.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/spl.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/super.c linux-2.6.30.patched/fs/aufs/super.c
---- linux-2.6.30/fs/aufs/super.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/super.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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);
-+ fsync_super(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 -Naurp linux-2.6.30/fs/aufs/super.h linux-2.6.30.patched/fs/aufs/super.h
---- linux-2.6.30/fs/aufs/super.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/super.h 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/sysaufs.c linux-2.6.30.patched/fs/aufs/sysaufs.c
---- linux-2.6.30/fs/aufs/sysaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/sysaufs.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/sysaufs.h linux-2.6.30.patched/fs/aufs/sysaufs.h
---- linux-2.6.30/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/sysaufs.h 2009-08-23 17:24:54.001941277 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/sysfs.c linux-2.6.30.patched/fs/aufs/sysfs.c
---- linux-2.6.30/fs/aufs/sysfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/sysfs.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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 -Naurp linux-2.6.30/fs/aufs/sysrq.c linux-2.6.30.patched/fs/aufs/sysrq.c
---- linux-2.6.30/fs/aufs/sysrq.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.30.patched/fs/aufs/sysrq.c 2009-08-23 17:24:54.005965979 +0200
-@@ -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);