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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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8
drivers/scsi/sd.c
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@@ -1119,7 +1119,7 @@ static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt)
SCpnt->cmnd[0] = WRITE_6;
if (blk_integrity_rq(rq))
sd_dif_prepare(SCpnt);
t10_pi_prepare(SCpnt->request, sdkp->protection_type);
} else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
@@ -2047,8 +2047,10 @@ static int sd_done(struct scsi_cmnd *SCpnt)
"sd_done: completed %d of %d bytes\n",
good_bytes, scsi_bufflen(SCpnt)));
if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt))
sd_dif_complete(SCpnt, good_bytes);
if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt) &&
good_bytes)
t10_pi_complete(SCpnt->request, sdkp->protection_type,
good_bytes / scsi_prot_interval(SCpnt));
return good_bytes;
}