From: Nicholas Bellinger <[email protected]> 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(). Cc: Martin K. Petersen <[email protected]> Cc: Sagi Grimberg <[email protected]> Cc: Or Gerlitz <[email protected]> Cc: Quinn Tran <[email protected]> Cc: Giridhar Malavali <[email protected]> Signed-off-by: Nicholas Bellinger <[email protected]> --- drivers/target/target_core_sbc.c | 31 +++++++++++++++++++++++++++---- include/target/target_core_backend.h | 1 + 2 files changed, 28 insertions(+), 4 deletions(-) diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 97b207d..55c3526 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -1271,9 +1271,9 @@ 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, - unsigned int ei_lba, struct scatterlist *sg, int sg_off) +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; struct se_dif_v1_tuple *sdt; @@ -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); diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h index 8e6eac6..68e2820 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -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 *); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
