[Qemu-devel] [PATCH 2/2] [scsi-bus]: Add MAINTENANCE_IN and MAINTENANCE_OUT case for SCSIRequest xfer and xfer_mode setup

["Nicholas A. Bellinger" <nab@linux-iscsi.org>]

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

This patch updates hw/scsi-bus.c to add MAINTENANCE_IN and MAINTENANCE_OUT case in
scsi_req_length() to extra the incoming buffer length into SCSIRequest->cmd.xfer,
and adds a second MAINTENANCE_OUT case in scsi_req_xfer_mode() in order to properly
set SCSI_XFER_TO_DEV for WRITE data.

Tested with Linux KVM guests and Megasas 8708EM2 HBA emulation and TCM_Loop target ports.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
 hw/scsi-bus.c  |   14 ++++++++++++++
 hw/scsi-defs.h |    2 ++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 75ec74e..7d80405 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -329,6 +329,17 @@ static int scsi_req_length(SCSIRequest *req, uint8_t *cmd)
     case PERSISTENT_RESERVE_IN:
         req->cmd.xfer = cmd[8] | (cmd[7] << 8);
         break;
+    case MAINTENANCE_OUT:
+    case MAINTENANCE_IN:
+        if (req->dev->type != TYPE_ROM) {
+            /* Used for MI_REPORT_TARGET_PGS, MO_SET_TARGET_PGS et al. */
+            req->cmd.xfer = cmd[9] | (cmd[8] << 8) |
+                            (cmd[7] << 16) | (cmd[6] << 24);
+        } else {
+            /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
+            req->cmd.xfer = cmd[9] | (cmd[8] << 8);
+        }
+        break;
     }
     return 0;
 }
@@ -394,6 +405,7 @@ static void scsi_req_xfer_mode(SCSIRequest *req)
     case SEND_VOLUME_TAG:
     case WRITE_LONG_2:
     case PERSISTENT_RESERVE_OUT:
+    case MAINTENANCE_OUT:
         req->cmd.mode = SCSI_XFER_TO_DEV;
         break;
     default:
@@ -539,6 +551,8 @@ const char *scsi_command_name(uint8_t cmd)
         [ SPACE                    ] = "SPACE",
         [ INQUIRY                  ] = "INQUIRY",
         [ RECOVER_BUFFERED_DATA    ] = "RECOVER_BUFFERED_DATA",
+        [ MAINTENANCE_IN           ] = "MAINTENANCE_IN",
+        [ MAINTENANCE_OUT          ] = "MAINTENANCE_OUT",
         [ MODE_SELECT              ] = "MODE_SELECT",
         [ RESERVE                  ] = "RESERVE",
         [ RELEASE                  ] = "RELEASE",
diff --git a/hw/scsi-defs.h b/hw/scsi-defs.h
index 5890094..a4a3518 100644
--- a/hw/scsi-defs.h
+++ b/hw/scsi-defs.h
@@ -84,6 +84,8 @@
 #define MODE_SENSE_10         0x5a
 #define PERSISTENT_RESERVE_IN 0x5e
 #define PERSISTENT_RESERVE_OUT 0x5f
+#define MAINTENANCE_IN        0xa3
+#define MAINTENANCE_OUT       0xa4
 #define MOVE_MEDIUM           0xa5
 #define READ_12               0xa8
 #define WRITE_12              0xaa
-- 
1.5.6.5