Patchwork [23/30] scsi-disk: restruct emulation: READ_CAPACITY

login
register
mail settings
Submitter Gerd Hoffmann
Date Nov. 26, 2009, 2:34 p.m.
Message ID <1259246056-5389-24-git-send-email-kraxel@redhat.com>
Download mbox | patch
Permalink /patch/39554/
State New
Headers show

Comments

Gerd Hoffmann - Nov. 26, 2009, 2:34 p.m.
Move READ_CAPACITY emulation from scsi_send_command() to
scsi_disk_emulate_command().

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/scsi-disk.c |   55 +++++++++++++++++++++++++++----------------------------
 1 files changed, 27 insertions(+), 28 deletions(-)

Patch

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 7d59998..4f56a22 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -617,7 +617,9 @@  static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
 
 static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf)
 {
+    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
     BlockDriverState *bdrv = req->dev->dinfo->bdrv;
+    uint64_t nb_sectors;
     int buflen = 0;
 
     switch (req->cmd.buf[0]) {
@@ -679,6 +681,30 @@  static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf)
     case ALLOW_MEDIUM_REMOVAL:
         bdrv_set_locked(bdrv, req->cmd.buf[4] & 1);
 	break;
+    case READ_CAPACITY:
+        /* The normal LEN field for this command is zero.  */
+	memset(outbuf, 0, 8);
+	bdrv_get_geometry(bdrv, &nb_sectors);
+        if (!nb_sectors)
+            goto not_ready;
+        nb_sectors /= s->cluster_size;
+        /* Returned value is the address of the last sector.  */
+        nb_sectors--;
+        /* Remember the new size for read/write sanity checking. */
+        s->max_lba = nb_sectors;
+        /* Clip to 2TB, instead of returning capacity modulo 2TB. */
+        if (nb_sectors > UINT32_MAX)
+            nb_sectors = UINT32_MAX;
+        outbuf[0] = (nb_sectors >> 24) & 0xff;
+        outbuf[1] = (nb_sectors >> 16) & 0xff;
+        outbuf[2] = (nb_sectors >> 8) & 0xff;
+        outbuf[3] = nb_sectors & 0xff;
+        outbuf[4] = 0;
+        outbuf[5] = 0;
+        outbuf[6] = s->cluster_size * 2;
+        outbuf[7] = 0;
+        buflen = 8;
+	break;
     default:
         goto illegal_request;
     }
@@ -792,6 +818,7 @@  static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
     case RELEASE_10:
     case START_STOP:
     case ALLOW_MEDIUM_REMOVAL:
+    case READ_CAPACITY:
         rc = scsi_disk_emulate_command(&r->req, outbuf);
         if (rc > 0) {
             r->iov.iov_len = rc;
@@ -801,34 +828,6 @@  static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
             return 0;
         }
         break;
-    case READ_CAPACITY:
-	DPRINTF("Read Capacity\n");
-        /* The normal LEN field for this command is zero.  */
-	memset(outbuf, 0, 8);
-	bdrv_get_geometry(s->qdev.dinfo->bdrv, &nb_sectors);
-        nb_sectors /= s->cluster_size;
-        /* Returned value is the address of the last sector.  */
-        if (nb_sectors) {
-            nb_sectors--;
-            /* Remember the new size for read/write sanity checking. */
-            s->max_lba = nb_sectors;
-            /* Clip to 2TB, instead of returning capacity modulo 2TB. */
-            if (nb_sectors > UINT32_MAX)
-                nb_sectors = UINT32_MAX;
-            outbuf[0] = (nb_sectors >> 24) & 0xff;
-            outbuf[1] = (nb_sectors >> 16) & 0xff;
-            outbuf[2] = (nb_sectors >> 8) & 0xff;
-            outbuf[3] = nb_sectors & 0xff;
-            outbuf[4] = 0;
-            outbuf[5] = 0;
-            outbuf[6] = s->cluster_size * 2;
-            outbuf[7] = 0;
-            r->iov.iov_len = 8;
-        } else {
-            scsi_command_complete(r, CHECK_CONDITION, NOT_READY);
-            return 0;
-        }
-	break;
     case READ_6:
     case READ_10:
     case 0x88: