[Qemu-devel] [PATCH 18/32] scsi-disk: rd/wr/vr-protect !=0 is an error

[Paolo Bonzini <pbonzini@redhat.com>]

From: Ronnie Sahlberg <ronniesahlberg@gmail.com>

The QEMU SCSI emulation does not support protection information,
so any READ/WRITE/VERIFY commands that has the protect bits set to
non-zero should fail with ILLEGAL_REQUEST/INVALID_FIELD_IN_CDB

>From SCSI SBC :
If the logical unit does not support protection information,
then the device server should terminate the command with CHECK CONDITION
status with the sense key set to ILLEGAL REQUEST and the additional sense
code set to INVALID FIELD IN CDB.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
[ Rebase after scsi_dma_reqops introduction - Paolo ]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi-disk.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index fd5cd70..526da4b 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1774,6 +1774,9 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
     case READ_16:
         len = r->req.cmd.xfer / s->qdev.blocksize;
         DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len);
+        if (r->req.cmd.buf[1] & 0xe0) {
+            goto illegal_request;
+        }
         if (r->req.cmd.lba > s->qdev.max_lba) {
             goto illegal_lba;
         }
@@ -1794,6 +1797,9 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
         DPRINTF("Write %s(sector %" PRId64 ", count %d)\n",
                 (command & 0xe) == 0xe ? "And Verify " : "",
                 r->req.cmd.lba, len);
+        if (r->req.cmd.buf[1] & 0xe0) {
+            goto illegal_request;
+        }
         if (r->req.cmd.lba > s->qdev.max_lba) {
             goto illegal_lba;
         }
@@ -1802,6 +1808,9 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
         break;
     default:
         abort();
+    illegal_request:
+        scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
+        return 0;
     illegal_lba:
         scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
         return 0;
-- 
1.7.10.4