Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 395ccb25 authored by Nicholas Bellinger's avatar Nicholas Bellinger
Browse files

target/sbc: Add sbc_dif_read_strip software emulation 



Split up __sbc_dif_verify_read() so that VERIFY READ emulation can
perform target-core specific READ_STRIP, seperate from the existing
FILEIO/RAMDISK backend emulation code.

Also add sbc_dif_read_strip() in order to determine number of sectors
using cmd->prot_length, and skip the extra sbc_dif_copy_prot().

Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent a84bf9ee

drivers/target/target_core_sbc.c

+27 −4
Original line number Diff line number Diff line
@@ -1271,8 +1271,8 @@ sbc_dif_verify_write(struct se_cmd *cmd, sector_t start, unsigned int sectors, 
}

EXPORT_SYMBOL(sbc_dif_verify_write);



sense_reason_t

sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,

static sense_reason_t

__sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,

		      unsigned int ei_lba, struct scatterlist *sg, int sg_off)

{

	struct se_device *dev = cmd->se_dev;
@@ -1326,8 +1326,31 @@ sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors, 
		kunmap_atomic(paddr);

		kunmap_atomic(daddr);

	}

	sbc_dif_copy_prot(cmd, sectors, true, sg, sg_off);



	return 0;

}



sense_reason_t

sbc_dif_read_strip(struct se_cmd *cmd)

{

	struct se_device *dev = cmd->se_dev;

	u32 sectors = cmd->prot_length / dev->prot_length;



	return __sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, 0,

				     cmd->t_prot_sg, 0);

}



sense_reason_t

sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,

		    unsigned int ei_lba, struct scatterlist *sg, int sg_off)

{

	sense_reason_t rc;



	rc = __sbc_dif_verify_read(cmd, start, sectors, ei_lba, sg, sg_off);

	if (rc)

		return rc;



	sbc_dif_copy_prot(cmd, sectors, true, sg, sg_off);

	return 0;

}

EXPORT_SYMBOL(sbc_dif_verify_read);

include/target/target_core_backend.h

+1 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ sense_reason_t sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int, 
				     unsigned int, struct scatterlist *, int);

sense_reason_t	sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,

				    unsigned int, struct scatterlist *, int);

sense_reason_t	sbc_dif_read_strip(struct se_cmd *);



void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);

int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);