weizhouapache commented on code in PR #14007:
URL: https://github.com/apache/cloudstack/pull/14007#discussion_r3959545821


##########
plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtRestoreBackupCommandWrapper.java:
##########
@@ -340,38 +341,68 @@ private boolean 
replaceBlockDeviceWithBackup(KVMStoragePoolManager storagePoolMg
 
     private boolean attachVolumeToVm(KVMStoragePoolManager storagePoolMgr, 
String vmName, PrimaryDataStoreTO volumePool, String volumePath) {
         String deviceToAttachDiskTo = getDeviceToAttachDisk(vmName);
+        if (Storage.StoragePoolType.RBD.equals(volumePool.getPoolType())) {
+            return attachRbdVolumeToVm(storagePoolMgr, vmName, volumePool, 
volumePath, deviceToAttachDiskTo);
+        }
         List<String> virshCmd = new ArrayList<>();
         virshCmd.add(Script.getExecutableAbsolutePath("virsh"));
-        if (volumePool.getPoolType() == Storage.StoragePoolType.RBD) {
-            String xmlForRbdDisk = getXmlForRbdDisk(storagePoolMgr, 
volumePool, volumePath, deviceToAttachDiskTo);
-            logger.debug("RBD disk xml to attach: {}", xmlForRbdDisk);
-            virshCmd.add("attach-device");
-            virshCmd.add(vmName);
-            virshCmd.add("/dev/stdin");
-            virshCmd.add("<<EOF%sEOF");
-        } else {
-            virshCmd.add("attach-disk");
-            virshCmd.add(vmName);
-            virshCmd.add(volumePath);
-            virshCmd.add(deviceToAttachDiskTo);
-            if 
(Storage.StoragePoolType.Linstor.equals(volumePool.getPoolType())) {
-                virshCmd.add("--subdriver");
-                virshCmd.add("qcow2");
-            }
-            virshCmd.add("--cache");
-            virshCmd.add("none");
+        virshCmd.add("attach-disk");
+        virshCmd.add(vmName);
+        virshCmd.add(volumePath);
+        virshCmd.add(deviceToAttachDiskTo);
+        virshCmd.add("--driver");
+        virshCmd.add("qemu");
+        if (!Storage.StoragePoolType.Linstor.equals(volumePool.getPoolType())) 
{

Review Comment:
   @abh1sar 
   
   should this be
   ```suggestion
           if 
(Storage.StoragePoolType.Linstor.equals(volumePool.getPoolType())) {
   ```
   
   ?



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