79 lines
3.1 KiB
Python
79 lines
3.1 KiB
Python
# Copyright 2013 VMware, Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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import sqlalchemy as sa
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from sqlalchemy import orm
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from sqlalchemy.orm import exc
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from neutron.api.v2 import attributes
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from neutron.db import db_base_plugin_v2
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from neutron.db import model_base
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from neutron.db import models_v2
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from neutron.openstack.common import log as logging
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from neutron.plugins.vmware.extensions import maclearning as mac
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LOG = logging.getLogger(__name__)
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class MacLearningState(model_base.BASEV2):
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port_id = sa.Column(sa.String(36),
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sa.ForeignKey('ports.id', ondelete="CASCADE"),
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primary_key=True)
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mac_learning_enabled = sa.Column(sa.Boolean(), nullable=False)
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# Add a relationship to the Port model using the backref attribute.
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# This will instruct SQLAlchemy to eagerly load this association.
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port = orm.relationship(
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models_v2.Port,
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backref=orm.backref("mac_learning_state", lazy='joined',
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uselist=False, cascade='delete'))
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class MacLearningDbMixin(object):
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"""Mixin class for mac learning."""
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def _make_mac_learning_state_dict(self, port, fields=None):
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res = {'port_id': port['port_id'],
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mac.MAC_LEARNING: port[mac.MAC_LEARNING]}
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return self._fields(res, fields)
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def _extend_port_mac_learning_state(self, port_res, port_db):
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state = port_db.mac_learning_state
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if state and state.mac_learning_enabled:
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port_res[mac.MAC_LEARNING] = state.mac_learning_enabled
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# Register dict extend functions for ports
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db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
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attributes.PORTS, ['_extend_port_mac_learning_state'])
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def _update_mac_learning_state(self, context, port_id, enabled):
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try:
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query = self._model_query(context, MacLearningState)
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state = query.filter(MacLearningState.port_id == port_id).one()
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state.update({mac.MAC_LEARNING: enabled})
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except exc.NoResultFound:
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self._create_mac_learning_state(context,
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{'id': port_id,
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mac.MAC_LEARNING: enabled})
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def _create_mac_learning_state(self, context, port):
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with context.session.begin(subtransactions=True):
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enabled = port[mac.MAC_LEARNING]
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state = MacLearningState(port_id=port['id'],
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mac_learning_enabled=enabled)
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context.session.add(state)
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return self._make_mac_learning_state_dict(state)
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