| Message ID | 20230531075410.480499-2-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/17] btrfs: fix file_offset for REQ_BTRFS_ONE_ORDERED bios that get split | expand |
diff --git a/fs/btrfs/bio.c b/fs/btrfs/bio.c index ae6345668d2d01..42c0ded42fafe5 100644 --- a/fs/btrfs/bio.c +++ b/fs/btrfs/bio.c @@ -81,8 +81,7 @@ static struct btrfs_bio *btrfs_split_bio(struct btrfs_fs_info *fs_info, btrfs_bio_init(bbio, fs_info, NULL, orig_bbio); bbio->inode = orig_bbio->inode; bbio->file_offset = orig_bbio->file_offset; - if (!(orig_bbio->bio.bi_opf & REQ_BTRFS_ONE_ORDERED)) - orig_bbio->file_offset += map_length; + orig_bbio->file_offset += map_length; atomic_inc(&orig_bbio->pending_ios); return bbio;
If a bio gets split, it needs to have a proper file_offset for checksum validation and repair to work properly. Based on feedback from Josef, commit 852eee62d31a ("btrfs: allow btrfs_submit_bio to split bios") skipped this adjustment for ONE_ORDERED bios. But if we actually ever need to split a ONE_ORDERED read bio, this will lead to a wrong file offset in the repair code. Right now the only user of the file_offset is logging of an error message so this is mostly harmless, but the wrong offset might be more problematic for additional users in the future. Fixes: 852eee62d31a ("btrfs: allow btrfs_submit_bio to split bios") Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> --- fs/btrfs/bio.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)