VirtualDisk: Add error_policy 'report' value

virtinst/devicedisk.py

@@ -178,6 +178,8 @@ class VirtualDisk(VirtualDevice):
     IO_MODE_THREADS = "threads"
     io_modes = [IO_MODE_NATIVE, IO_MODE_THREADS]
 
+    error_policies = ["ignore", "stop", "enospace", "report"]
+
     @staticmethod
     def disk_type_to_xen_driver_name(disk_type):
         """
@@ -204,8 +206,6 @@ class VirtualDisk(VirtualDevice):
             return "dir"
         return "file"
 
-    error_policies = ["ignore", "stop", "enospace"]
-
     @staticmethod
     def path_exists(conn, path):
         """