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block: move ref_tag calculation func to the block layer 

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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2
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -311,7 +311,7 @@ iser_set_dif_domain(struct scsi_cmnd *sc, struct ib_sig_attrs *sig_attrs,
{
domain->sig_type = IB_SIG_TYPE_T10_DIF;
domain->sig.dif.pi_interval = scsi_prot_interval(sc);
domain->sig.dif.ref_tag = scsi_prot_ref_tag(sc);
domain->sig.dif.ref_tag = t10_pi_ref_tag(sc->request);
/*
* At the moment we hard code those, but in the future
* we will take them from sc.

3
drivers/nvme/host/core.c
View File

@ -611,8 +611,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
case NVME_NS_DPS_PI_TYPE2:
control |= NVME_RW_PRINFO_PRCHK_GUARD |
NVME_RW_PRINFO_PRCHK_REF;
cmnd->rw.reftag = cpu_to_le32(
nvme_block_nr(ns, blk_rq_pos(req)));
cmnd->rw.reftag = cpu_to_le32(t10_pi_ref_tag(req));
break;
}
}

2
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View File

@ -4568,7 +4568,7 @@ _scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
mpi_request->CDB.EEDP32.PrimaryReferenceTag =
cpu_to_be32(scsi_prot_ref_tag(scmd));
cpu_to_be32(t10_pi_ref_tag(scmd->request));
break;
case SCSI_PROT_DIF_TYPE3:

4
drivers/scsi/sd_dif.c
View File

@ -124,7 +124,7 @@ void sd_dif_prepare(struct scsi_cmnd *scmd)
if (sdkp->protection_type == T10_PI_TYPE3_PROTECTION)
return;
phys = scsi_prot_ref_tag(scmd);
phys = t10_pi_ref_tag(scmd->request);
__rq_for_each_bio(bio, scmd->request) {
struct bio_integrity_payload *bip = bio_integrity(bio);
@ -176,7 +176,7 @@ void sd_dif_complete(struct scsi_cmnd *scmd, unsigned int good_bytes)
return;
intervals = good_bytes / scsi_prot_interval(scmd);
phys = scsi_prot_ref_tag(scmd);
phys = t10_pi_ref_tag(scmd->request);
__rq_for_each_bio(bio, scmd->request) {
struct bio_integrity_payload *bip = bio_integrity(bio);

10
include/linux/t10-pi.h
View File

@ -37,6 +37,16 @@ struct t10_pi_tuple {
#define T10_PI_APP_ESCAPE cpu_to_be16(0xffff)
#define T10_PI_REF_ESCAPE cpu_to_be32(0xffffffff)
static inline u32 t10_pi_ref_tag(struct request *rq)
{
#ifdef CONFIG_BLK_DEV_INTEGRITY
return blk_rq_pos(rq) >>
(rq->q->integrity.interval_exp - 9) & 0xffffffff;
#else
return -1U;
#endif
}
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;

7
include/scsi/scsi_cmnd.h
View File

@ -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;