OpenStack Networking (Neutron)
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# 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.db import model_base
import sqlalchemy as sa
class VlanAllocation(model_base.BASEV2):
"""Represent allocation state of a vlan_id on a physical network.
If allocated is False, the vlan_id on the physical_network is
available for allocation to a tenant network. If allocated is
True, the vlan_id on the physical_network is in use, either as a
tenant or provider network.
When an allocation is released, if the vlan_id for the
physical_network is inside the pool described by
VlanTypeDriver.network_vlan_ranges, then allocated is set to
False. If it is outside the pool, the record is deleted.
"""
__tablename__ = 'ml2_vlan_allocations'
__table_args__ = (
sa.Index('ix_ml2_vlan_allocations_physical_network_allocated',
'physical_network', 'allocated'),
model_base.BASEV2.__table_args__,)
physical_network = sa.Column(sa.String(64), nullable=False,
primary_key=True)
vlan_id = sa.Column(sa.Integer, nullable=False, primary_key=True,
autoincrement=False)
allocated = sa.Column(sa.Boolean, nullable=False)
@classmethod
def get_segmentation_id(cls):
return cls.vlan_id
@property
def segmentation_id(self):
return self.vlan_id
@staticmethod
def primary_keys():
return {'vlan_id', 'physical_network'}