[Xen-changelog] [qemu-xen master] scsi-bus: correct responses for INQUIRY and REQUEST SENSE

[patchbot@xxxxxxx]

commit b95fbe6f122af9992a016a620477c6e7f1cc383a
Author:     Hannes Reinecke <hare@xxxxxxx>
AuthorDate: Fri Aug 18 11:37:02 2017 +0200
Commit:     Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue Sep 19 17:44:14 2017 -0500

    scsi-bus: correct responses for INQUIRY and REQUEST SENSE
    
    According to SPC-3 INQUIRY and REQUEST SENSE should return GOOD
    even on unsupported LUNS.
    
    Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
    Message-Id: <1503049022-14749-1-git-send-email-hare@xxxxxxx>
    Reported-by: Laszlo Ersek <lersek@xxxxxxxxxx>
    Fixes: ded6ddc5a7b95217557fa360913d1213e12d4a6d
    Cc: qemu-stable@xxxxxxxxxx
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
    Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
    (cherry picked from commit b07fbce6349c7b84642e7ed56c7a1ac3c1caca61)
    Signed-off-by: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
---
 hw/scsi/scsi-bus.c | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index e364410..ade31c1 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -516,8 +516,10 @@ static size_t scsi_sense_len(SCSIRequest *req)
 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
 {
     SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
+    int fixed_sense = (req->cmd.buf[1] & 1) == 0;
 
-    if (req->lun != 0) {
+    if (req->lun != 0 &&
+        buf[0] != INQUIRY && buf[0] != REQUEST_SENSE) {
         scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
         scsi_req_complete(req, CHECK_CONDITION);
         return 0;
@@ -535,9 +537,28 @@ static int32_t scsi_target_send_command(SCSIRequest *req, 
uint8_t *buf)
         break;
     case REQUEST_SENSE:
         scsi_target_alloc_buf(&r->req, scsi_sense_len(req));
-        r->len = scsi_device_get_sense(r->req.dev, r->buf,
-                                       MIN(req->cmd.xfer, r->buf_len),
-                                       (req->cmd.buf[1] & 1) == 0);
+        if (req->lun != 0) {
+            const struct SCSISense sense = SENSE_CODE(LUN_NOT_SUPPORTED);
+
+            if (fixed_sense) {
+                r->buf[0] = 0x70;
+                r->buf[2] = sense.key;
+                r->buf[10] = 10;
+                r->buf[12] = sense.asc;
+                r->buf[13] = sense.ascq;
+                r->len = MIN(req->cmd.xfer, SCSI_SENSE_LEN);
+            } else {
+                r->buf[0] = 0x72;
+                r->buf[1] = sense.key;
+                r->buf[2] = sense.asc;
+                r->buf[3] = sense.ascq;
+                r->len = 8;
+            }
+        } else {
+            r->len = scsi_device_get_sense(r->req.dev, r->buf,
+                                           MIN(req->cmd.xfer, r->buf_len),
+                                           fixed_sense);
+        }
         if (r->req.dev->sense_is_ua) {
             scsi_device_unit_attention_reported(req->dev);
             r->req.dev->sense_len = 0;
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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