This is a note to let you know that I've just added the patch titled
btrfs: fix file_offset for REQ_BTRFS_ONE_ORDERED bios that get split
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-fix-file_offset-for-req_btrfs_one_ordered-bios.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit aed7b096ff1a7875fffa4dcdaeff78af197d7828
Author: Christoph Hellwig <hch@xxxxxx>
Date: Wed May 31 09:53:54 2023 +0200
btrfs: fix file_offset for REQ_BTRFS_ONE_ORDERED bios that get split
[ Upstream commit c731cd0b6d255e4855a7cac9f276864032ab2387 ]
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")
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/btrfs/bio.c b/fs/btrfs/bio.c
index b3ad0f51e6162..b86faf8126e77 100644
--- a/fs/btrfs/bio.c
+++ b/fs/btrfs/bio.c
@@ -95,8 +95,7 @@ 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;
