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Commit 2a876f5e authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

block: add a rq_integrity_vec helper 



This provides a nice little shortcut to get the integrity data for
drivers like NVMe that only support a single integrity segment.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
parent 3aef3cae

include/linux/blkdev.h

+16 −0
Original line number Diff line number Diff line
@@ -1559,6 +1559,17 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, 
	return bio_integrity_intervals(bi, sectors) * bi->tuple_size;

}



/*

 * Return the first bvec that contains integrity data.  Only drivers that are

 * limited to a single integrity segment should use this helper.

 */

static inline struct bio_vec *rq_integrity_vec(struct request *rq)

{

	if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))

		return NULL;

	return rq->bio->bi_integrity->bip_vec;

}



#else /* CONFIG_BLK_DEV_INTEGRITY */



struct bio;
@@ -1633,6 +1644,11 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, 
	return 0;

}



static inline struct bio_vec *rq_integrity_vec(struct request *rq)

{

	return NULL;

}



#endif /* CONFIG_BLK_DEV_INTEGRITY */



struct block_device_operations {