[PATCH 3.12 027/181] Btrfs: don't delete ordered roots from list during cleanup

Jiri Slaby
2014-06-30T12:10:47Z

From: Josef Bacik <jbacik@fusionio.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1de2cfde93c20a0357ff1dffed901598470facf3 upstream.

During transaction cleanup after an abort we are just removing roots from the
ordered roots list which is incorrect. We have a BUG_ON() to make sure that the
root is still part of the ordered roots list when we put our ordered extent
which we were tripping in this case. So do like we do everywhere else and just
move it to the tail of the ordered roots list and allow the normal cleanup to
take care of stuff. Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
fs/btrfs/disk-io.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 409dcbd234dc..5bdf8ce5be20 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3809,7 +3809,8 @@ static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info)
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
ordered_root);
- list_del_init(&root->ordered_root);
+ list_move_tail(&root->ordered_root,
+ &fs_info->ordered_roots);

btrfs_destroy_ordered_extents(root);

--
2.0.0