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authorJeff Mahoney <jeffm@suse.com>2016-12-20 13:28:27 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-19 20:17:21 +0100
commitf0382c090a207f9beae1ab2e76883ea304031ae0 (patch)
tree219524e578284f751637d62341e9b9ffdc801c9f /fs
parent205e997acde7546eae7d78a0618dd9ed10046987 (diff)
btrfs: fix error handling when run_delayed_extent_op fails
commit aa7c8da35d1905d80e840d075f07d26ec90144b5 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 795547c860fc..2a2e370399ba 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2570,7 +2570,10 @@ 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);
btrfs_delayed_ref_unlock(locked_ref);
return ret;