qemu: hotplug: Refactor qemuDomainAttachDeviceDiskLiveInternal

We now explicitly handle media change elsewhere so we can drop the
switch statement. This will also make it more intuitive once CDROM
device hotplug might be supported.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/qemu/qemu_hotplug.c

@@ -1113,52 +1113,42 @@ qemuDomainAttachDeviceDiskLiveInternal(virQEMUDriverPtr driver,
     if (qemuDomainDetermineDiskChain(driver, vm, disk, true) < 0)
         goto cleanup;
 
-    switch ((virDomainDiskDevice) disk->device)  {
-    case VIR_DOMAIN_DISK_DEVICE_DISK:
-    case VIR_DOMAIN_DISK_DEVICE_LUN:
-        for (i = 0; i < vm->def->ndisks; i++) {
-            if (virDomainDiskDefCheckDuplicateInfo(vm->def->disks[i], disk) < 0)
-                goto cleanup;
-        }
-
-        switch ((virDomainDiskBus) disk->bus) {
-        case VIR_DOMAIN_DISK_BUS_USB:
-            if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                               _("disk device='lun' is not supported for usb bus"));
-                break;
-            }
-            ret = qemuDomainAttachUSBMassStorageDevice(driver, vm, disk);
-            break;
-
-        case VIR_DOMAIN_DISK_BUS_VIRTIO:
-            ret = qemuDomainAttachVirtioDiskDevice(driver, vm, disk);
-            break;
+    for (i = 0; i < vm->def->ndisks; i++) {
+        if (virDomainDiskDefCheckDuplicateInfo(vm->def->disks[i], disk) < 0)
+            goto cleanup;
+    }
 
-        case VIR_DOMAIN_DISK_BUS_SCSI:
-            ret = qemuDomainAttachSCSIDisk(driver, vm, disk);
+    switch ((virDomainDiskBus) disk->bus) {
+    case VIR_DOMAIN_DISK_BUS_USB:
+        if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("disk device='lun' is not supported for usb bus"));
             break;
-
-        case VIR_DOMAIN_DISK_BUS_IDE:
-        case VIR_DOMAIN_DISK_BUS_FDC:
-        case VIR_DOMAIN_DISK_BUS_XEN:
-        case VIR_DOMAIN_DISK_BUS_UML:
-        case VIR_DOMAIN_DISK_BUS_SATA:
-        case VIR_DOMAIN_DISK_BUS_SD:
-            /* Note that SD card hotplug support should be added only once
-             * they support '-device' (don't require -drive only).
-             * See also: qemuDiskBusNeedsDriveArg */
-        case VIR_DOMAIN_DISK_BUS_LAST:
-            virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
-                           _("disk bus '%s' cannot be hotplugged."),
-                           virDomainDiskBusTypeToString(disk->bus));
         }
+        ret = qemuDomainAttachUSBMassStorageDevice(driver, vm, disk);
+        break;
+
+    case VIR_DOMAIN_DISK_BUS_VIRTIO:
+        ret = qemuDomainAttachVirtioDiskDevice(driver, vm, disk);
         break;
 
-    case VIR_DOMAIN_DISK_DEVICE_CDROM:
-    case VIR_DOMAIN_DISK_DEVICE_FLOPPY:
-    case VIR_DOMAIN_DISK_DEVICE_LAST:
+    case VIR_DOMAIN_DISK_BUS_SCSI:
+        ret = qemuDomainAttachSCSIDisk(driver, vm, disk);
         break;
+
+    case VIR_DOMAIN_DISK_BUS_IDE:
+    case VIR_DOMAIN_DISK_BUS_FDC:
+    case VIR_DOMAIN_DISK_BUS_XEN:
+    case VIR_DOMAIN_DISK_BUS_UML:
+    case VIR_DOMAIN_DISK_BUS_SATA:
+    case VIR_DOMAIN_DISK_BUS_SD:
+        /* Note that SD card hotplug support should be added only once
+         * they support '-device' (don't require -drive only).
+         * See also: qemuDiskBusNeedsDriveArg */
+    case VIR_DOMAIN_DISK_BUS_LAST:
+        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
+                       _("disk bus '%s' cannot be hotplugged."),
+                       virDomainDiskBusTypeToString(disk->bus));
     }
 
  cleanup: