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# Copyright 2024 StackHPC Ltd
#
# 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.objects.ports import Port
from neutron.services.trunk.drivers import base as trunk_base
from neutron_lib.api.definitions import portbindings
from neutron_lib.callbacks import events
from neutron_lib.callbacks import registry
from neutron_lib.callbacks import resources
from neutron_lib import context as n_context
from neutron_lib.db import api as db_api
from neutron_lib.plugins import directory
from neutron_lib.services.trunk import constants as trunk_consts
from oslo_config import cfg
from oslo_log import log as logging
LOG = logging.getLogger(__name__)
MECH_DRIVER_NAME = 'genericswitch'
SUPPORTED_INTERFACES = (
portbindings.VIF_TYPE_OTHER,
portbindings.VIF_TYPE_VHOST_USER,
)
SUPPORTED_SEGMENTATION_TYPES = (
trunk_consts.SEGMENTATION_TYPE_VLAN,
)
class GenericSwitchTrunkDriver(trunk_base.DriverBase):
@property
def is_loaded(self):
try:
return (MECH_DRIVER_NAME in
cfg.CONF.ml2.mechanism_drivers)
except cfg.NoSuchOptError:
return False
@registry.receives(resources.TRUNK_PLUGIN, [events.AFTER_INIT])
def register(self, resource, event, trigger, payload=None):
super(GenericSwitchTrunkDriver, self).register(
resource, event, trigger, payload=payload)
self._handler = GenericSwitchTrunkHandler(self.plugin_driver)
registry.subscribe(
self._handler.subports_added,
resources.SUBPORTS,
events.AFTER_CREATE)
registry.subscribe(
self._handler.subports_deleted,
resources.SUBPORTS,
events.AFTER_DELETE)
@classmethod
def create(cls, plugin_driver):
cls.plugin_driver = plugin_driver
return cls(MECH_DRIVER_NAME,
SUPPORTED_INTERFACES,
SUPPORTED_SEGMENTATION_TYPES,
None,
can_trunk_bound_port=True)
class GenericSwitchTrunkHandler(object):
def __init__(self, plugin_driver):
self.plugin_driver = plugin_driver
self.core_plugin = directory.get_plugin()
def subports_added(self, resource, event, trunk_plugin, payload):
trunk = payload.states[0]
subports = payload.metadata['subports']
LOG.debug("GenericSwitch: subports added %s to trunk %s",
subports, trunk)
context = n_context.get_admin_context()
with db_api.CONTEXT_READER.using(context):
parent_port = Port.get_object(context, id=trunk.port_id)
parent_port_obj = self.core_plugin._make_port_dict(parent_port)
self.plugin_driver.subports_added(
context,
parent_port_obj,
subports)
def subports_deleted(self, resource, event, trunk_plugin, payload):
trunk = payload.states[0]
subports = payload.metadata['subports']
LOG.debug("GenericSwitch: subports deleted %s from trunk %s",
subports, trunk)
context = n_context.get_admin_context()
with db_api.CONTEXT_READER.using(context):
parent_port = Port.get_object(context, id=trunk.port_id)
parent_port_obj = self.core_plugin._make_port_dict(parent_port)
self.plugin_driver.subports_deleted(
context,
parent_port_obj,
subports)
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