From: Nicholas Bellinger <n...@linux-iscsi.org>

This patch adds support for DIF related CHECK_CONDITION ASC/ASCQ
exception cases into transport_send_check_condition_and_sense().

This includes:

  LOGICAL BLOCK GUARD CHECK FAILED
  LOGICAL BLOCK APPLICATION TAG CHECK FAILED
  LOGICAL BLOCK REFERENCE TAG CHECK FAILED

that used by DIF TYPE1 and TYPE3 failure cases.

Cc: Martin K. Petersen <martin.peter...@oracle.com>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Hannes Reinecke <h...@suse.de>
Cc: Sagi Grimberg <sa...@mellanox.com>
Cc: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
---
 drivers/target/target_core_transport.c |   30 ++++++++++++++++++++++++++++++
 include/target/target_core_base.h      |    3 +++
 2 files changed, 33 insertions(+)

diff --git a/drivers/target/target_core_transport.c 
b/drivers/target/target_core_transport.c
index 91953da..707ee17 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2648,6 +2648,36 @@ transport_send_check_condition_and_sense(struct se_cmd 
*cmd,
                buffer[SPC_ASC_KEY_OFFSET] = 0x1d;
                buffer[SPC_ASCQ_KEY_OFFSET] = 0x00;
                break;
+       case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED:
+               /* CURRENT ERROR */
+               buffer[0] = 0x70;
+               buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
+               /* ILLEGAL REQUEST */
+               buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+               /* LOGICAL BLOCK GUARD CHECK FAILED */
+               buffer[SPC_ASC_KEY_OFFSET] = 0x10;
+               buffer[SPC_ASCQ_KEY_OFFSET] = 0x01;
+               break;
+       case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED:
+               /* CURRENT ERROR */
+               buffer[0] = 0x70;
+               buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
+               /* ILLEGAL REQUEST */
+               buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+               /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */
+               buffer[SPC_ASC_KEY_OFFSET] = 0x10;
+               buffer[SPC_ASCQ_KEY_OFFSET] = 0x02;
+               break;
+       case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED:
+               /* CURRENT ERROR */
+               buffer[0] = 0x70;
+               buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
+               /* ILLEGAL REQUEST */
+               buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+               /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */
+               buffer[SPC_ASC_KEY_OFFSET] = 0x10;
+               buffer[SPC_ASCQ_KEY_OFFSET] = 0x03;
+               break;
        case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
        default:
                /* CURRENT ERROR */
diff --git a/include/target/target_core_base.h 
b/include/target/target_core_base.h
index 15f402c..9a6e091 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -206,6 +206,9 @@ enum tcm_sense_reason_table {
        TCM_OUT_OF_RESOURCES                    = R(0x12),
        TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
        TCM_MISCOMPARE_VERIFY                   = R(0x14),
+       TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
+       TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
+       TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
 #undef R
 };
 
-- 
1.7.10.4

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