[Qemu-devel] [PATCH] scsi: Print command name in debug

[Alexey Kardashevskiy <aik@ozlabs.ru>]

This makes scsi_command_name() public.

This makes use of scsi_command_name() in debug output for scsi-disk and
spapr-vscsi host bus adapter. Before this, SCSI used to print hex numbers
instead of human-friendly strings.

This adds GET_EVENT_STATUS_NOTIFICATION and READ_DISC_INFORMATION to
the list of SCSI commands supported by scsi_command_name().

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 hw/scsi/scsi-bus.c    | 4 +++-
 hw/scsi/scsi-disk.c   | 3 ++-
 hw/scsi/spapr_vscsi.c | 5 +++--
 include/block/scsi.h  | 2 ++
 4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 06399fa..5e7d30f 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -1429,7 +1429,7 @@ int scsi_build_sense(uint8_t *in_buf, int in_len,
     }
 }
 
-static const char *scsi_command_name(uint8_t cmd)
+const char *scsi_command_name(uint8_t cmd)
 {
     static const char *names[] = {
         [ TEST_UNIT_READY          ] = "TEST_UNIT_READY",
@@ -1545,6 +1545,8 @@ static const char *scsi_command_name(uint8_t cmd)
         [ SET_READ_AHEAD           ] = "SET_READ_AHEAD",
         [ ALLOW_OVERWRITE          ] = "ALLOW_OVERWRITE",
         [ MECHANISM_STATUS         ] = "MECHANISM_STATUS",
+        [ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION",
+        [ READ_DISC_INFORMATION    ] = "READ_DISC_INFORMATION",
     };
 
     if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 4bcef55..2b2266a 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2027,7 +2027,8 @@ static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
                 (long)r->req.cmd.xfer);
         break;
     default:
-        DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
+        DPRINTF("Unknown SCSI command (%2.2x=%s)\n", buf[0],
+                scsi_command_name(buf[0]));
         scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
         return 0;
     }
diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c
index d4ada4f..7dc0f80 100644
--- a/hw/scsi/spapr_vscsi.c
+++ b/hw/scsi/spapr_vscsi.c
@@ -800,8 +800,9 @@ static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
     req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req);
     n = scsi_req_enqueue(req->sreq);
 
-    DPRINTF("VSCSI: Queued command tag 0x%x CMD 0x%x LUN %d ret: %d\n",
-            req->qtag, srp->cmd.cdb[0], lun, n);
+    DPRINTF("VSCSI: Queued command tag 0x%x CMD 0x%x=%s LUN %d ret: %d\n",
+            req->qtag, srp->cmd.cdb[0], scsi_command_name(srp->cmd.cdb[0]),
+            lun, n);
 
     if (n) {
         /* Transfer direction must be set before preprocessing the
diff --git a/include/block/scsi.h b/include/block/scsi.h
index 9ab045b..edde960 100644
--- a/include/block/scsi.h
+++ b/include/block/scsi.h
@@ -143,6 +143,8 @@
 #define READ_CD               0xbe
 #define SEND_DVD_STRUCTURE    0xbf
 
+const char *scsi_command_name(uint8_t cmd);
+
 /*
  * SERVICE ACTION IN subcodes
  */
-- 
2.0.0