[Qemu-devel] [PATCH 03/17] scsi: Rename scsi_cdb_length() to scsi_xfer_length()

[Hannes Reinecke <hare@suse.de>]

scsi_cdb_length() does not return the length of the cdb, but
the transfersize encoded in the cdb. So rename it to scsi_xfer_length()
and add a new scsi_cdb_length() which actually does return the
length of the cdb.
With that DEBUG_SCSI can now display the correct CDB buffer.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 hw/scsi/scsi-bus.c     | 31 +++++++++++++++++++------------
 hw/scsi/scsi-disk.c    |  2 +-
 include/hw/scsi/scsi.h |  3 ++-
 3 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 022a524..919a86c 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -879,11 +879,11 @@ uint32_t scsi_data_cdb_length(uint8_t *buf)
     if ((buf[0] >> 5) == 0 && buf[4] == 0) {
         return 256;
     } else {
-        return scsi_cdb_length(buf);
+        return scsi_xfer_length(buf);
     }
 }
 
-uint32_t scsi_cdb_length(uint8_t *buf)
+uint32_t scsi_xfer_length(uint8_t *buf)
 {
     switch (buf[0] >> 5) {
     case 0:
@@ -906,7 +906,7 @@ uint32_t scsi_cdb_length(uint8_t *buf)
 
 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
 {
-    cmd->xfer = scsi_cdb_length(buf);
+    cmd->xfer = scsi_xfer_length(buf);
     switch (buf[0]) {
     case TEST_UNIT_READY:
     case REWIND:
@@ -1213,28 +1213,35 @@ static uint64_t scsi_cmd_lba(SCSICommand *cmd)
     return lba;
 }
 
-int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf)
-{
-    int rc;
+int scsi_cdb_length(uint8_t *buf) {
+    int cdb_len;
 
-    cmd->lba = -1;
     switch (buf[0] >> 5) {
     case 0:
-        cmd->len = 6;
+        cdb_len = 6;
         break;
     case 1:
     case 2:
-        cmd->len = 10;
+        cdb_len = 10;
         break;
     case 4:
-        cmd->len = 16;
+        cdb_len = 16;
         break;
     case 5:
-        cmd->len = 12;
+        cdb_len = 12;
         break;
     default:
-        return -1;
+        cdb_len = -1;
     }
+    return cdb_len;
+}
+
+int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf)
+{
+    int rc;
+
+    cmd->lba = -1;
+    cmd->len = scsi_cdb_length(buf);
 
     switch (dev->type) {
     case TYPE_TAPE:
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index ae9e08d..30e3789 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2393,7 +2393,7 @@ static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
     DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
     {
         int i;
-        for (i = 1; i < req->cmd.len; i++) {
+        for (i = 1; i < scsi_cdb_length(buf); i++) {
             printf(" 0x%02x", buf[i]);
         }
         printf("\n");
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index caaa320..4e9bbd1 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -240,7 +240,8 @@ extern const struct SCSISense sense_code_SPACE_ALLOC_FAILED;
 #define SENSE_CODE(x) sense_code_ ## x
 
 uint32_t scsi_data_cdb_length(uint8_t *buf);
-uint32_t scsi_cdb_length(uint8_t *buf);
+uint32_t scsi_xfer_length(uint8_t *buf);
+int scsi_cdb_length(uint8_t *buf);
 int scsi_sense_valid(SCSISense sense);
 int scsi_build_sense(uint8_t *in_buf, int in_len,
                      uint8_t *buf, int len, bool fixed);
-- 
1.8.4.5