DaanHoogland commented on a change in pull request #3532: Add new "Add volume" 
button, to add volume to VM instance directly
URL: https://github.com/apache/cloudstack/pull/3532#discussion_r312402532
 
 

 ##########
 File path: server/src/main/java/com/cloud/storage/VolumeApiServiceImpl.java
 ##########
 @@ -1662,7 +1629,45 @@ public Volume attachVolumeToVM(Long vmId, Long 
volumeId, Long deviceId) {
             return vol;
         }
     }
+    
+    public Volume verifyVmAndAttachVolume(Long vmId, VolumeVO volume){
 
+        Account caller = CallContext.current().getCallingAccount();
+        Volume vol = null;
+        if (vmId != null) {
+            // Check that the virtual machine ID is valid and it's a user vm
+            UserVmVO vm = _userVmDao.findById(vmId);
+            if (vm == null || vm.getType() != VirtualMachine.Type.User) {
+                throw new InvalidParameterValueException("Please specify a 
valid User VM.");
+            }
+
+            // Check that the VM is in the correct state
+            if (vm.getState() != State.Running && vm.getState() != 
State.Stopped) {
+                throw new InvalidParameterValueException("Please specify a VM 
that is either running or stopped.");
+            }
+
+            // permission check
 
 Review comment:
   checkPermissions()

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