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block: move ref_tag calculation func to the block layer

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Currently this function is implemented in the scsi layer, but it's
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.

Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: 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 00:15:31 +03:00
committed by Jens Axboe
parent c454edc21b
commit ddd0bc7569
6 changed files with 16 additions and 12 deletions
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7
include/scsi/scsi_cmnd.h
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@@ -4,6 +4,7 @@
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <linux/t10-pi.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/timer.h>
@@ -313,12 +314,6 @@ static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
return scmd->device->sector_size;
}
static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
{
return blk_rq_pos(scmd->request) >>
(ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
}
static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
{
return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;