SCSI: Handle inquiry commands of varying length (Justin Chevrier).
Openserver 5.0.5 sends an Inquiry command to the emulated SCSI disk
expecting a response length of 40 bytes. Currently the response to an
Inquiry command is hardcoded to 36 bytes. When receiving a response of
length 36 instead of 40 Openserver panics.
Modifications to original patch based on feedback from Ryan Harper and Paul
Brook. Thanks guys.
Signed-off-by: Justin Chevrier <address@hidden>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5903 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index f7aa6d7..9a08411 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -38,6 +38,7 @@
#define STATUS_CHECK_CONDITION 2
#define SCSI_DMA_BUF_SIZE 131072
+#define SCSI_MAX_INQUIRY_LEN 256
typedef struct SCSIRequest {
SCSIDeviceState *dev;
@@ -492,7 +493,11 @@
"is less than 36 (TODO: only 5 required)\n", len);
}
}
- memset(outbuf, 0, 36);
+
+ if(len > SCSI_MAX_INQUIRY_LEN)
+ len = SCSI_MAX_INQUIRY_LEN;
+
+ memset(outbuf, 0, len);
if (lun || buf[1] >> 5) {
outbuf[0] = 0x7f; /* LUN not supported */
@@ -510,10 +515,10 @@
Some later commands are also implemented. */
outbuf[2] = 3;
outbuf[3] = 2; /* Format 2 */
- outbuf[4] = 31;
+ outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */
/* Sync data transfer and TCQ. */
outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0);
- r->buf_len = 36;
+ r->buf_len = len;
break;
case 0x16:
DPRINTF("Reserve(6)\n");
