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block: Error an attempt to split an atomic write in bio_split()

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This is disallowed.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20241111112150.3756529-3-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry 2024-11-11 11:21:46 +00:00 committed by Jens Axboe
parent e546fe1da9
commit 27b26f09a7
1 changed files with 4 additions and 0 deletions
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4
block/bio.c
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@ -1674,6 +1674,10 @@ struct bio *bio_split(struct bio *bio, int sectors,
if (WARN_ON_ONCE(bio_op(bio) == REQ_OP_ZONE_APPEND)) if (WARN_ON_ONCE(bio_op(bio) == REQ_OP_ZONE_APPEND))
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
/* atomic writes cannot be split */
if (bio->bi_opf & REQ_ATOMIC)
return ERR_PTR(-EINVAL);
split = bio_alloc_clone(bio->bi_bdev, bio, gfp, bs); split = bio_alloc_clone(bio->bi_bdev, bio, gfp, bs);
if (!split) if (!split)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);