From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Mon, 26 Sep 2011 16:04:20 +0000 (-0700)
Subject: 3.0 patches
X-Git-Tag: v3.0.5~12
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=163b9cf5f8760200e4671f8cbbbf3f585acfa9a6;p=thirdparty%2Fkernel%2Fstable-queue.git

3.0 patches
---

diff --git a/queue-3.0/btrfs-fix-d_off-in-the-first-dirent.patch b/queue-3.0/btrfs-fix-d_off-in-the-first-dirent.patch
new file mode 100644
index 00000000000..37002a8af21
--- /dev/null
+++ b/queue-3.0/btrfs-fix-d_off-in-the-first-dirent.patch
@@ -0,0 +1,74 @@
+From 3765fefaee2da83f10829fa64a74e6b7360350cb Mon Sep 17 00:00:00 2001
+From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
+Date: Sun, 18 Sep 2011 10:20:46 -0400
+Subject: btrfs: fix d_off in the first dirent
+
+From: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
+
+commit 3765fefaee2da83f10829fa64a74e6b7360350cb upstream.
+
+Since the d_off in the first dirent for "." (that originates from
+the 4th argument "offset" of filldir() for the 2nd dirent for "..")
+is wrongly assigned in btrfs_real_readdir(), telldir returns same
+offset for different locations.
+
+ | # mkfs.btrfs /dev/sdb1
+ | # mount /dev/sdb1 fs0
+ | # cd fs0
+ | # touch file0 file1
+ | # ../test
+ | telldir: 0
+ | readdir: d_off = 2, d_name = "."
+ | telldir: 2
+ | readdir: d_off = 2, d_name = ".."
+ | telldir: 2
+ | readdir: d_off = 3, d_name = "file0"
+ | telldir: 3
+ | readdir: d_off = 2147483647, d_name = "file1"
+ | telldir: 2147483647
+
+To fix this problem, pass filp->f_pos (which is loff_t) instead.
+
+ | # ../test
+ | telldir: 0
+ | readdir: d_off = 1, d_name = "."
+ | telldir: 1
+ | readdir: d_off = 2, d_name = ".."
+ | telldir: 2
+ | readdir: d_off = 3, d_name = "file0"
+ :
+
+At the moment the "offset" for "." is unused because there is no
+preceding dirent, however it is better to pass filp->f_pos to follow
+grammatical usage.
+
+Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
+Signed-off-by: Chris Mason <chris.mason@oracle.com>
+Cc: Grazvydas Ignotas <notasas@gmail.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+---
+ fs/btrfs/inode.c |    5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+--- a/fs/btrfs/inode.c
++++ b/fs/btrfs/inode.c
+@@ -4124,7 +4124,8 @@ static int btrfs_real_readdir(struct fil
+ 
+ 	/* special case for "." */
+ 	if (filp->f_pos == 0) {
+-		over = filldir(dirent, ".", 1, 1, btrfs_ino(inode), DT_DIR);
++		over = filldir(dirent, ".", 1,
++			       filp->f_pos, btrfs_ino(inode), DT_DIR);
+ 		if (over)
+ 			return 0;
+ 		filp->f_pos = 1;
+@@ -4133,7 +4134,7 @@ static int btrfs_real_readdir(struct fil
+ 	if (filp->f_pos == 1) {
+ 		u64 pino = parent_ino(filp->f_path.dentry);
+ 		over = filldir(dirent, "..", 2,
+-			       2, pino, DT_DIR);
++			       filp->f_pos, pino, DT_DIR);
+ 		if (over)
+ 			return 0;
+ 		filp->f_pos = 2;
diff --git a/queue-3.0/series b/queue-3.0/series
index be92d9bfb62..8db4032424d 100644
--- a/queue-3.0/series
+++ b/queue-3.0/series
@@ -209,3 +209,4 @@ alsa-usb-audio-clear-chip-probing-on-error-exit.patch
 drm-radeon-kms-fix-ddia-enable-on-some-rs690-systems.patch
 alsa-fm801-fix-double-free-in-case-of-error-in-tuner-detection.patch
 alsa-fm801-gracefully-handle-failure-of-tuner-auto-detect.patch
+btrfs-fix-d_off-in-the-first-dirent.patch