diff options
| author | Boris Burkov <boris@bur.io> | 2023-07-21 09:02:06 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-19 12:30:24 +0200 |
| commit | b5cd2c8a07c61040ef7418f2188dbced4d206f7b (patch) | |
| tree | 025f874e19f110fe9ab55531aa9f483be1496960 /fs/btrfs/inode.c | |
| parent | 6fd4d27daccbcd0e79d9f7eb58a4d21dbbd3158a (diff) | |
| download | linux-stable-b5cd2c8a07c61040ef7418f2188dbced4d206f7b.tar.gz linux-stable-b5cd2c8a07c61040ef7418f2188dbced4d206f7b.tar.bz2 linux-stable-b5cd2c8a07c61040ef7418f2188dbced4d206f7b.zip | |
btrfs: free qgroup rsv on io failure
commit e28b02118b94e42be3355458a2406c6861e2dd32 upstream.
If we do a write whose bio suffers an error, we will never reclaim the
qgroup reserved space for it. We allocate the space in the write_iter
codepath, then release the reservation as we allocate the ordered
extent, but we only create a delayed ref if the ordered extent finishes.
If it has an error, we simply leak the rsv. This is apparent in running
any error injecting (dmerror) fstests like btrfs/146 or btrfs/160. Such
tests fail due to dmesg on umount complaining about the leaked qgroup
data space.
When we clean up other aspects of space on failed ordered_extents, also
free the qgroup rsv.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
CC: stable@vger.kernel.org # 5.10+
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>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index aa090b0b5d29..db2b33a822fc 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3359,6 +3359,13 @@ out: btrfs_free_reserved_extent(fs_info, ordered_extent->disk_bytenr, ordered_extent->disk_num_bytes, 1); + /* + * Actually free the qgroup rsv which was released when + * the ordered extent was created. + */ + btrfs_qgroup_free_refroot(fs_info, inode->root->root_key.objectid, + ordered_extent->qgroup_rsv, + BTRFS_QGROUP_RSV_DATA); } } |