Merge "Add validate_location"

glance/store/backend.py

@@ -369,3 +369,8 @@ def set_acls(location_uri, public=False, read_tenants=[],
                        write_tenants=write_tenants)
     except NotImplementedError:
         LOG.debug(_("Skipping store.set_acls... not implemented."))
+
+
+def validate_location(uri, context=None):
+    store = get_store_from_uri(uri)
+    store.validate_location(uri)

glance/store/driver.py

@@ -103,6 +103,13 @@ class Store(object):
         """
         # NOTE(flaper87): This should probably go away
 
+    def validate_location(self, location):
+        """
+        Takes a location and validates it for the presence
+        of any account references
+        """
+        pass
+
     def get(self, location, offset=0, chunk_size=None, context=None):
         """
         Takes a `glance.store.location.Location` object that indicates