parallels: set format for real disk devices

It seems file format is usually specified event for
real block devices. So report that file format is
raw in virDomainGetXMLDesc and add checks for proper
file format to prlsdkAddDisk.
Signed-off-by: NDmitry Guryanov <dguryanov@parallels.com>

src/parallels/parallels_sdk.c

@@ -476,6 +476,7 @@ prlsdkGetDiskInfo(PRL_HANDLE prldisk,
             virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_PLOOP);
     } else {
         virDomainDiskSetType(disk, VIR_STORAGE_TYPE_BLOCK);
+        virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
     }
 
     if (isCdrom)
@@ -2486,13 +2487,24 @@ static int prlsdkAddDisk(PRL_HANDLE sdkdom, virDomainDiskDefPtr disk)
         if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
             virDomainDiskGetFormat(disk) != VIR_STORAGE_FILE_PLOOP) {
 
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                           _("Invalid disk format: %d"), disk->src->type);
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Invalid format of "
+                           "disk %s, Parallels Cloud Server supports only "
+                           "images in ploop format."), disk->src->path);
             goto cleanup;
         }
 
         emutype = PDT_USE_IMAGE_FILE;
     } else {
+        if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
+            (virDomainDiskGetFormat(disk) != VIR_STORAGE_FILE_RAW &&
+             virDomainDiskGetFormat(disk) != VIR_STORAGE_FILE_NONE &&
+             virDomainDiskGetFormat(disk) != VIR_STORAGE_FILE_AUTO)) {
+
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Invalid format "
+                           "of disk %s, it should be either not set, or set "
+                           "to raw or auto."), disk->src->path);
+            goto cleanup;
+        }
         emutype = PDT_USE_REAL_DEVICE;
     }