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btrfs: free qgroup reserve when ORDERED_IOERR is set

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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>
This commit is contained in:
Boris Burkov
2023-12-01 13:00:09 -08:00
committed by David Sterba
parent 0ac1d13a55
commit f63e1164b9
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/ordered-data.c
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@@ -599,7 +599,9 @@ void btrfs_remove_ordered_extent(struct btrfs_inode *btrfs_inode,
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,