From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 22 Aug 2017 09:42:59 +0200
Subject: [PATCH] scsi: introduce scsi_build_sense
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Move more knowledge of sense data format out of hw/scsi/scsi-bus.c
for reusability.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/scsi-bus.c   |  8 +-------
 include/scsi/utils.h |  2 ++
 scsi/utils.c         | 11 +++++++++++
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 42920d5422..652ab046ab 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -818,13 +818,7 @@ void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
 {
     trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
                                sense.key, sense.asc, sense.ascq);
-    memset(req->sense, 0, 18);
-    req->sense[0] = 0x70;
-    req->sense[2] = sense.key;
-    req->sense[7] = 10;
-    req->sense[12] = sense.asc;
-    req->sense[13] = sense.ascq;
-    req->sense_len = 18;
+    req->sense_len = scsi_build_sense(req->sense, sense);
 }
 
 static void scsi_req_enqueue_internal(SCSIRequest *req)
diff --git a/include/scsi/utils.h b/include/scsi/utils.h
index 90bf4dce6e..b49392d841 100644
--- a/include/scsi/utils.h
+++ b/include/scsi/utils.h
@@ -30,6 +30,8 @@ typedef struct SCSISense {
     uint8_t ascq;
 } SCSISense;
 
+int scsi_build_sense(uint8_t *buf, SCSISense sense);
+
 /*
  * Predefined sense codes
  */
diff --git a/scsi/utils.c b/scsi/utils.c
index 2327e06da0..89d9167d9d 100644
--- a/scsi/utils.c
+++ b/scsi/utils.c
@@ -96,6 +96,17 @@ int scsi_cdb_length(uint8_t *buf)
     return cdb_len;
 }
 
+int scsi_build_sense(uint8_t *buf, SCSISense sense)
+{
+    memset(buf, 0, 18);
+    buf[0] = 0x70;
+    buf[2] = sense.key;
+    buf[7] = 10;
+    buf[12] = sense.asc;
+    buf[13] = sense.ascq;
+    return 18;
+}
+
 /*
  * Predefined sense codes
  */