scsi: add special traces for common commands

Can be useful when debugging the device scan phase.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/scsi-bus.c

@@ -396,6 +396,23 @@ SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
     }
 
     req->cmd = cmd;
+    switch (buf[0]) {
+    case INQUIRY:
+        trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
+        break;
+    case TEST_UNIT_READY:
+        trace_scsi_test_unit_ready(d->id, lun, tag);
+        break;
+    case REPORT_LUNS:
+        trace_scsi_report_luns(d->id, lun, tag);
+        break;
+    case REQUEST_SENSE:
+        trace_scsi_request_sense(d->id, lun, tag);
+        break;
+    default:
+        break;
+    }
+
     return req;
 }
 

trace-events

@@ -252,6 +252,10 @@ disable scsi_req_parsed(int target, int lun, int tag, int cmd, int mode, int xfe
 disable scsi_req_parsed_lba(int target, int lun, int tag, int cmd, uint64_t lba) "target %d lun %d tag %d command %d lba %"PRIu64""
 disable scsi_req_parse_bad(int target, int lun, int tag, int cmd) "target %d lun %d tag %d command %d"
 disable scsi_req_build_sense(int target, int lun, int tag, int key, int asc, int ascq) "target %d lun %d tag %d key %#02x asc %#02x ascq %#02x"
+disable scsi_report_luns(int target, int lun, int tag) "target %d lun %d tag %d"
+disable scsi_inquiry(int target, int lun, int tag, int cdb1, int cdb2) "target %d lun %d tag %d page %#02x/%#02x"
+disable scsi_test_unit_ready(int target, int lun, int tag) "target %d lun %d tag %d"
+disable scsi_request_sense(int target, int lun, int tag) "target %d lun %d tag %d"
 
 # vl.c
 disable vm_state_notify(int running, int reason) "running %d reason %d"