6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Boris Burkov boris@bur.io
commit f63e1164b90b385cd832ff0fdfcfa76c3cc15436 upstream.
An ordered extent completing is a critical moment in qgroup reserve handling, as the ownership of the reservation is handed off from the ordered extent to the delayed ref. In the happy path we release (unlock) but do not free (decrement counter) the reservation, and the delayed ref drives the free. However, on an error, we don't create a delayed ref, since there is no ref to add. Therefore, free on the error path.
CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Qu Wenruo wqu@suse.com Signed-off-by: Boris Burkov boris@bur.io Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/ordered-data.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -544,7 +544,9 @@ void btrfs_remove_ordered_extent(struct release = entry->disk_num_bytes; else release = entry->num_bytes; - btrfs_delalloc_release_metadata(btrfs_inode, release, false); + btrfs_delalloc_release_metadata(btrfs_inode, release, + test_bit(BTRFS_ORDERED_IOERR, + &entry->flags)); }
percpu_counter_add_batch(&fs_info->ordered_bytes, -entry->num_bytes,