Fill in trunk_details on port resource

This patch fills in the trunk_details field with trunk_id and
sub_ports, exposing trunk-related information on the ports
resource to consumers of the Neutron API.

Change-Id: I1678301734e7f945e6f0400e62970b908da77a71
Partially-implements: blueprint vlan-aware-vms

neutron/services/trunk/models.py

@@ -32,6 +32,8 @@ class Trunk(model_base.HasStandardAttributes, model_base.BASEV2,
         backref=sa.orm.backref('trunk_port', lazy='joined', uselist=False,
                                cascade='delete'))
 
+    sub_ports = sa.orm.relationship('SubPort', lazy='joined', uselist=True)
+
 
 class SubPort(model_base.BASEV2):
 

neutron/services/trunk/plugin.py

@@ -15,11 +15,13 @@
 from oslo_log import log as logging
 from oslo_utils import uuidutils
 
+from neutron.api.v2 import attributes
 from neutron.callbacks import events
 from neutron.callbacks import registry
 from neutron.db import api as db_api
 from neutron.db import common_db_mixin
 from neutron.db import db_base_plugin_common
+from neutron.db import db_base_plugin_v2
 from neutron.objects import base as objects_base
 from neutron.objects import trunk as trunk_objects
 from neutron.services import service_base
@@ -30,12 +32,28 @@ from neutron.services.trunk import rules
 LOG = logging.getLogger(__name__)
 
 
+def _extend_port_trunk_details(core_plugin, port_res, port_db):
+    """Add trunk details to a port."""
+    if port_db.trunk_port:
+        subports = [{'segmentation_id': x.segmentation_id,
+                     'segmentation_type': x.segmentation_type,
+                     'port_id': x.port_id}
+                    for x in port_db.trunk_port.sub_ports]
+        trunk_details = {'trunk_id': port_db.trunk_port.id,
+                         'sub_ports': subports}
+        port_res['trunk_details'] = trunk_details
+
+    return port_res
+
+
 class TrunkPlugin(service_base.ServicePluginBase,
                   common_db_mixin.CommonDbMixin):
 
     supported_extension_aliases = ["trunk", "trunk-details"]
 
     def __init__(self):
+        db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
+            attributes.PORTS, [_extend_port_trunk_details])
         self._segmentation_types = {}
         registry.notify(constants.TRUNK_PLUGIN, events.AFTER_INIT, self)
         LOG.debug('Trunk plugin loaded')

neutron/tests/tempest/api/test_trunk_details.py

@@ -0,0 +1,57 @@
+# Copyright 2016 Hewlett Packard Enterprise Development Company LP
+#
+#    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 tempest import test
+
+from neutron.tests.tempest.api import test_trunk
+
+
+class TestTrunkDetailsJSON(test_trunk.TrunkTestJSONBase):
+
+    extension = 'trunk-details'
+
+    @test.idempotent_id('f0bed24f-d36a-498b-b4e7-0d66e3fb7308')
+    def test_port_resource_trunk_details_no_subports(self):
+        trunk = self._create_trunk_with_network_and_parent([])
+        port = self.client.show_port(trunk['trunk']['port_id'])
+        expected_trunk_details = {'sub_ports': [],
+                                  'trunk_id': trunk['trunk']['id']}
+        observed_trunk_details = port['port'].get('trunk_details')
+        self.assertIsNotNone(observed_trunk_details)
+        self.assertEqual(expected_trunk_details,
+                         observed_trunk_details)
+
+    @test.idempotent_id('544bcaf2-86fb-4930-93ab-ece1c3cc33df')
+    def test_port_resource_trunk_details_with_subport(self):
+        subport_network = self.create_network()
+        parent_port = self.create_port(subport_network)
+        subport_data = {'port_id': parent_port['id'],
+                        'segmentation_type': 'vlan',
+                        'segmentation_id': 2}
+        trunk = self._create_trunk_with_network_and_parent([subport_data])
+        port = self.client.show_port(trunk['trunk']['port_id'])
+        expected_trunk_details = {'sub_ports': [subport_data],
+                                  'trunk_id': trunk['trunk']['id']}
+        observed_trunk_details = port['port'].get('trunk_details')
+        self.assertIsNotNone(observed_trunk_details)
+        self.assertEqual(expected_trunk_details,
+                         observed_trunk_details)
+
+    @test.idempotent_id('fe6d865f-1d5c-432e-b65d-904157172f24')
+    def test_port_resource_empty_trunk_details(self):
+        network = self.create_network()
+        port = self.create_port(network)
+        port = self.client.show_port(port['id'])
+        observed_trunk_details = port['port'].get('trunk_details')
+        self.assertIsNone(observed_trunk_details)