diff options
| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2023-09-14 09:07:01 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-10-12 16:44:09 +0200 |
| commit | 9acaa64187f9b4cbb75622883c96ea1a893d5431 (patch) | |
| tree | 49b678991588de37505fa00be1b48dbfbaaea79d /fs/btrfs/bio.c | |
| parent | 10e27980f2ff66ba0c6da55f33b4814d5bc86573 (diff) | |
btrfs: scrub: implement raid stripe tree support
A filesystem that uses the raid stripe tree for logical to physical
address translation can't use the regular scrub path, that reads all
stripes and then checks if a sector is unused afterwards.
When using the raid stripe tree, this will result in lookup errors, as
the stripe tree doesn't know the requested logical addresses.
In case we're scrubbing a filesystem which uses the RAID stripe tree for
multi-device logical to physical address translation, perform an extra
block mapping step to get the real on-disk stripe length from the stripe
tree when scrubbing the sectors.
This prevents a double completion of the btrfs_bio caused by splitting the
underlying bio and ultimately a use-after-free.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/bio.c')
| -rw-r--r-- | fs/btrfs/bio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/bio.c b/fs/btrfs/bio.c index ac6bc4f43ffb..ab7ee090b606 100644 --- a/fs/btrfs/bio.c +++ b/fs/btrfs/bio.c @@ -663,6 +663,8 @@ static bool btrfs_submit_chunk(struct btrfs_bio *bbio, int mirror_num) blk_status_t ret; int error; + smap.is_scrub = !bbio->inode; + btrfs_bio_counter_inc_blocked(fs_info); error = btrfs_map_block(fs_info, btrfs_op(bio), logical, &map_length, &bioc, &smap, &mirror_num); |