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block: move dif_prepare/dif_complete functions to block layer

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Currently these functions are implemented in the scsi layer, but their
actual place should be the block layer since T10-PI is a general data
integrity feature that is used in the nvme protocol as well. Also, use
the tuple size from the integrity profile since it may vary between
integrity types.

Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Max Gurtovoy
2018-07-30 00:15:32 +03:00
committed by Jens Axboe
parent ddd0bc7569
commit 10c41ddd61
5 changed files with 118 additions and 125 deletions
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3
include/linux/t10-pi.h
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@@ -51,5 +51,8 @@ extern const struct blk_integrity_profile t10_pi_type1_crc;
extern const struct blk_integrity_profile t10_pi_type1_ip;
extern const struct blk_integrity_profile t10_pi_type3_crc;
extern const struct blk_integrity_profile t10_pi_type3_ip;
extern void t10_pi_prepare(struct request *rq, u8 protection_type);
extern void t10_pi_complete(struct request *rq, u8 protection_type,
unsigned int intervals);
#endif