CLOUDSTACK-9682: Block VM migration to a storage which is in maintainenece mode. If

the destination pool is in maintenance mode do not allow a volume to be migrated to
the storage pool. Fixed it for volume migration and vm migration with volume.

Author: anshul-gangwar

server/src/com/cloud/storage/VolumeApiServiceImpl.java

@@ -1917,6 +1917,9 @@ public Volume migrateVolume(MigrateVolumeCmd cmd) {
         StoragePool destPool = (StoragePool)dataStoreMgr.getDataStore(storagePoolId, DataStoreRole.Primary);
         if (destPool == null) {
             throw new InvalidParameterValueException("Failed to find the destination storage pool: " + storagePoolId);
+        } else if (destPool.isInMaintenance()) {
+            throw new InvalidParameterValueException("Cannot migrate volume " + vol + "to the destination storage pool " + destPool.getName() +
+                    " as the storage pool is in maintenance mode.");
         }
 
         if (_volumeMgr.volumeOnSharedStoragePool(vol)) {

server/src/com/cloud/vm/UserVmManagerImpl.java

@@ -4983,6 +4983,9 @@ public VirtualMachine migrateVirtualMachineWithVolume(Long vmId, Host destinatio
                     throw new InvalidParameterValueException("There is no volume present with the given id " + entry.getKey());
                 } else if (pool == null) {
                     throw new InvalidParameterValueException("There is no storage pool present with the given id " + entry.getValue());
+                } else if (pool.isInMaintenance()) {
+                    throw new InvalidParameterValueException("Cannot migrate volume " + volume + "to the destination storage pool " + pool.getName() +
+                            " as the storage pool is in maintenance mode.");
                 } else {
                     // Verify the volume given belongs to the vm.
                     if (!vmVolumes.contains(volume)) {