target: Change TCM_NON_EXISTENT_LUN response to ASC=LOGICAL UNIT NOT SUPPORTED

This patch changes transport_send_check_condition_and_sense() for
TCM_NON_EXISTENT_LUN emulation to use 0x25 (LOGICAL UNIT NOT SUPPORTED)
instead of the original 0x20 (INVALID COMMAND OPERATION CODE).  This is
helpful to distinguish between TCM_UNSUPPORTED_SCSI_OPCODE ASC=0x20
exceptions.

Signed-off-by: Nicholas A. Bellinger <nab@risingtidesystems.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 89760329d5d0..cc5a339d4d5a 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -4726,6 +4726,13 @@ int transport_send_check_condition_and_sense(
          */
         switch (reason) {
         case TCM_NON_EXISTENT_LUN:
+                /* CURRENT ERROR */
+                buffer[offset] = 0x70;
+                /* ILLEGAL REQUEST */
+                buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+                /* LOGICAL UNIT NOT SUPPORTED */
+                buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25;
+                break;
         case TCM_UNSUPPORTED_SCSI_OPCODE:
         case TCM_SECTOR_COUNT_TOO_MANY:
                 /* CURRENT ERROR */