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authorJeff Mahoney <jeffm@suse.com>2016-12-20 13:28:27 -0500
committerDavid Sterba <dsterba@suse.com>2017-01-03 15:14:08 +0100
commitaa7c8da35d1905d80e840d075f07d26ec90144b5 (patch)
treed98c4cc3d44debbe6b75c9084b71f86a365c8669 /fs
parent73ba39ab9307340dc98ec3622891314bbc09cc2e (diff)
downloadlinux-aa7c8da35d1905d80e840d075f07d26ec90144b5.tar.bz2
btrfs: fix error handling when run_delayed_extent_op fails
In __btrfs_run_delayed_refs, the error path when run_delayed_extent_op fails sets locked_ref->processing = 0 but doesn't re-increment delayed_refs->num_heads_ready. As a result, we end up triggering the WARN_ON in btrfs_select_ref_head. Fixes: d7df2c796d7 (Btrfs: attach delayed ref updates to delayed ref heads) Reported-by: Jon Nelson <jnelson-suse@jamponi.net> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Reviewed-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/extent-tree.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e97302f437a1..5366e50c84c6 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2572,7 +2572,10 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
*/
if (must_insert_reserved)
locked_ref->must_insert_reserved = 1;
+ spin_lock(&delayed_refs->lock);
locked_ref->processing = 0;
+ delayed_refs->num_heads_ready++;
+ spin_unlock(&delayed_refs->lock);
btrfs_debug(fs_info,
"run_delayed_extent_op returned %d",
ret);