niansa-misc/linux
1
0
Fork 0
mirror of synced 2025-03-06 20:59:54 +01:00
Code Issues Projects Releases Packages Wiki Activity

block: Don't trim an atomic write

Browse source 
This is disallowed.

This check will now be relevant since the device mapper personalities
will start to support atomic writes, and they use this function.

Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20250116170301.474130-3-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry 2025-01-16 17:02:55 +00:00 • committed by Jens Axboe
parent 6a7e17b220
commit 554b22864c
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
block/bio.c
View file

@ -1610,6 +1610,10 @@ EXPORT_SYMBOL(bio_split);
*/
void bio_trim(struct bio *bio, sector_t offset, sector_t size)
{
/* We should never trim an atomic write */
if (WARN_ON_ONCE(bio->bi_opf & REQ_ATOMIC && size))
return;
if (WARN_ON_ONCE(offset > BIO_MAX_SECTORS || size > BIO_MAX_SECTORS ||
offset + size > bio_sectors(bio)))
return;