This is a note to let you know that I've just added the patch titled
Btrfs: don't check nodes for extent items
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-don-t-check-nodes-for-extent-items.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8a56457f5f8fa7c2698ffae8545214c5b96a2cb5 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@xxxxxx>
Date: Thu, 5 Jun 2014 16:08:45 -0400
Subject: Btrfs: don't check nodes for extent items
From: Josef Bacik <jbacik@xxxxxx>
commit 8a56457f5f8fa7c2698ffae8545214c5b96a2cb5 upstream.
The backref code was looking at nodes as well as leaves when we tried to
populate extent item entries. This is not good, and although we go away with it
for the most part because we'd skip where disk_bytenr != random_memory,
sometimes random_memory would match and suddenly boom. This fixes that problem.
Thanks,
Signed-off-by: Josef Bacik <jbacik@xxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/backref.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -984,11 +984,12 @@ again:
goto out;
}
if (ref->count && ref->parent) {
- if (extent_item_pos && !ref->inode_list) {
+ if (extent_item_pos && !ref->inode_list &&
+ ref->level == 0) {
u32 bsz;
struct extent_buffer *eb;
bsz = btrfs_level_size(fs_info->extent_root,
- info_level);
+ ref->level);
eb = read_tree_block(fs_info->extent_root,
ref->parent, bsz, 0);
if (!eb || !extent_buffer_uptodate(eb)) {
Patches currently in stable-queue which might be from jbacik@xxxxxx are
queue-3.15/btrfs-don-t-check-nodes-for-extent-items.patch
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