Fix IPv6 RA security group rule for DVR

Current IPv6 RA security group rule doesn't work for
DVR because the code only allows RA from device_owner
is network:router_interface. When DVR is enabled, the
router interface is network:router_interface_distributed.

This fix fixes the RA rule to allow RA from DVR router
interface, so router advertisement from DVR RADVD can
pass to VM.

Co-Authored-By: Baodong (Robert) Li <baoli@cisco.com>

Change-Id: Idd1324c653dcb15f5dacf2d897a7048bca22fc38
Partial-Bug: 1376325
Cherry-Picked-From: deffbbfdfe

neutron/db/securitygroups_rpc_base.py

@@ -14,6 +14,7 @@
 #    under the License.
 
 import netaddr
+from sqlalchemy import or_
 from sqlalchemy.orm import exc
 
 from neutron.common import constants as q_const
@@ -350,8 +351,10 @@ class SecurityGroupServerRpcMixin(sg_db.SecurityGroupDbMixin):
             models_v2.IPAllocation.subnet_id == subnet['id'])
         query = query.filter(
             models_v2.IPAllocation.ip_address == subnet['gateway_ip'])
-        query = query.filter(models_v2.Port.device_owner ==
-                             q_const.DEVICE_OWNER_ROUTER_INTF)
+        query = query.filter(or_(models_v2.Port.device_owner ==
+                             q_const.DEVICE_OWNER_ROUTER_INTF,
+                                 models_v2.Port.device_owner ==
+                             q_const.DEVICE_OWNER_DVR_INTERFACE))
         try:
             gateway_port = query.one()
         except (exc.NoResultFound, exc.MultipleResultsFound):

neutron/tests/unit/test_security_groups_rpc.py

@@ -769,6 +769,76 @@ class SGServerRpcCallBackTestCase(test_sg.SecurityGroupDBTestCase):
                 self._delete('ports', gateway_port_id)
                 self._delete('ports', interface_port_id)
 
+    def test_security_group_ra_rules_for_devices_ipv6_dvr(self):
+        fake_prefix = FAKE_PREFIX[const.IPv6]
+        fake_gateway = FAKE_IP['IPv6_GLOBAL']
+        with self.network() as n:
+            with contextlib.nested(self.subnet(n,
+                                               gateway_ip=fake_gateway,
+                                               cidr=fake_prefix,
+                                               ip_version=6,
+                                               ipv6_ra_mode=const.IPV6_SLAAC),
+                                   self.security_group()) as (subnet_v6,
+                                                              sg1):
+                sg1_id = sg1['security_group']['id']
+                rule1 = self._build_security_group_rule(
+                    sg1_id,
+                    'ingress', const.PROTO_NAME_TCP, '22',
+                    '22',
+                    ethertype=const.IPv6)
+                rules = {
+                    'security_group_rules': [rule1['security_group_rule']]}
+                self._make_security_group_rule(self.fmt, rules)
+
+                # Create DVR router interface port
+                gateway_res = self._make_port(
+                    self.fmt, n['network']['id'],
+                    fixed_ips=[{'subnet_id': subnet_v6['subnet']['id'],
+                                'ip_address': fake_gateway}],
+                    device_owner=const.DEVICE_OWNER_DVR_INTERFACE)
+                gateway_mac = gateway_res['port']['mac_address']
+                gateway_port_id = gateway_res['port']['id']
+                gateway_lla_ip = str(ipv6.get_ipv6_addr_by_EUI64(
+                    const.IPV6_LLA_PREFIX,
+                    gateway_mac))
+
+                ports_rest1 = self._make_port(
+                    self.fmt, n['network']['id'],
+                    fixed_ips=[{'subnet_id': subnet_v6['subnet']['id']}],
+                    security_groups=[sg1_id])
+                port_id1 = ports_rest1['port']['id']
+                self.rpc.devices = {port_id1: ports_rest1['port']}
+                devices = [port_id1, 'no_exist_device']
+                ctx = context.get_admin_context()
+                ports_rpc = self.rpc.security_group_rules_for_devices(
+                    ctx, devices=devices)
+                port_rpc = ports_rpc[port_id1]
+                expected = [{'direction': 'egress', 'ethertype': const.IPv4,
+                             'security_group_id': sg1_id},
+                            {'direction': 'egress', 'ethertype': const.IPv6,
+                             'security_group_id': sg1_id},
+                            {'direction': 'ingress',
+                             'protocol': const.PROTO_NAME_TCP,
+                             'ethertype': const.IPv6,
+                             'port_range_max': 22,
+                             'security_group_id': sg1_id,
+                             'port_range_min': 22},
+                            {'direction': 'ingress',
+                             'protocol': const.PROTO_NAME_ICMP_V6,
+                             'ethertype': const.IPv6,
+                             'source_ip_prefix': gateway_lla_ip,
+                             'source_port_range_min': const.ICMPV6_TYPE_RA},
+                            ]
+                self.assertEqual(port_rpc['security_group_rules'],
+                                 expected)
+                self._delete('ports', port_id1)
+                # Note(xuhanp): remove gateway port's fixed_ips or gateway port
+                # deletion will be prevented.
+                data = {'port': {'fixed_ips': []}}
+                req = self.new_update_request('ports', data, gateway_port_id)
+                self.deserialize(self.fmt, req.get_response(self.api))
+                self._delete('ports', gateway_port_id)
+
     def test_security_group_ra_rules_for_devices_ipv6_gateway_lla(self):
         fake_prefix = FAKE_PREFIX[const.IPv6]
         fake_gateway = FAKE_IP['IPv6_LLA']