1 files changed, 53 insertions, 0 deletions
diff --git a/neutron/db/port_hints_db.py b/neutron/db/port_hints_db.py
new file mode 100644
index 0000000000..0b45b413fb
--- /dev/null
+++ b/neutron/db/port_hints_db.py
@@ -0,0 +1,53 @@
+# Copyright 2023 Ericsson Software Technology
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from neutron_lib.api.definitions import port_hints as phints_def
+from oslo_serialization import jsonutils
+
+from neutron.objects.port.extensions import port_hints as phints_obj
+
+
+class PortHintsMixin(object):
+    """Mixin class to add hints to a port"""
+
+    def _process_create_port(self, context, data, result):
+        if not data.get(phints_def.HINTS):
+            result[phints_def.HINTS] = None
+            return
+
+        obj = phints_obj.PortHints(
+            context, port_id=result['id'],
+            hints=data[phints_def.HINTS])
+        obj.create()
+        result[phints_def.HINTS] = data[phints_def.HINTS]
+
+    def _process_update_port(self, context, data, result):
+        obj = phints_obj.PortHints.get_object(
+            context, port_id=result['id'])
+
+        if obj:
+            if data[phints_def.HINTS]:
+                obj.hints = data[phints_def.HINTS]
+                obj.update()
+            else:
+                obj.delete()
+            result[phints_def.HINTS] = data[phints_def.HINTS]
+        else:
+            self._process_create_port(context, data, result)
+
+    def _extend_port_dict(self, port_db, result):
+        if port_db.hints:
+            result[phints_def.HINTS] = jsonutils.loads(port_db.hints.hints)
+        else:
+            result[phints_def.HINTS] = None