77aee9e715
Add support for delete of extra_dhcp_opt(s) on a port. Where
[{'opt_name': 'opt_to_delete', 'opt_value': None}].
Closes-Bug: #1228008
Change-Id: I75baeff91575cac6546fe2cc6fcf7a0d8e92853f
127 lines
5.4 KiB
Python
127 lines
5.4 KiB
Python
# Copyright (c) 2013 OpenStack Foundation.
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# 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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# @author: Don Kehn, dekehn@gmail.com
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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 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.extensions import extra_dhcp_opt as edo_ext
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from neutron.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class ExtraDhcpOpt(model_base.BASEV2, models_v2.HasId):
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"""Represent a generic concept of extra options associated to a port.
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Each port may have none to many dhcp opts associated to it that can
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define specifically different or extra options to DHCP clients.
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These will be written to the <network_id>/opts files, and each option's
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tag will be referenced in the <network_id>/host file.
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"""
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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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nullable=False)
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opt_name = sa.Column(sa.String(64), nullable=False)
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opt_value = sa.Column(sa.String(255), nullable=False)
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__table_args__ = (sa.UniqueConstraint('port_id',
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'opt_name',
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name='uidx_portid_optname'),)
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# Add a relationship to the Port model in order to instruct SQLAlchemy to
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# eagerly load extra_dhcp_opts bindings
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ports = orm.relationship(
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models_v2.Port,
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backref=orm.backref("dhcp_opts", lazy='joined', cascade='delete'))
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class ExtraDhcpOptMixin(object):
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"""Mixin class to add extra options to the DHCP opts file
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and associate them to a port.
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"""
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def _process_port_create_extra_dhcp_opts(self, context, port,
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extra_dhcp_opts):
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if not extra_dhcp_opts:
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return port
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with context.session.begin(subtransactions=True):
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for dopt in extra_dhcp_opts:
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if dopt['opt_value']:
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db = ExtraDhcpOpt(
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port_id=port['id'],
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opt_name=dopt['opt_name'],
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opt_value=dopt['opt_value'])
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context.session.add(db)
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return self._extend_port_extra_dhcp_opts_dict(context, port)
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def _extend_port_extra_dhcp_opts_dict(self, context, port):
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port[edo_ext.EXTRADHCPOPTS] = self._get_port_extra_dhcp_opts_binding(
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context, port['id'])
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def _get_port_extra_dhcp_opts_binding(self, context, port_id):
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query = self._model_query(context, ExtraDhcpOpt)
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binding = query.filter(ExtraDhcpOpt.port_id == port_id)
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return [{'opt_name': r.opt_name, 'opt_value': r.opt_value}
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for r in binding]
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def _update_extra_dhcp_opts_on_port(self, context, id, port,
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updated_port=None):
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# It is not necessary to update in a transaction, because
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# its called from within one from ovs_neutron_plugin.
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dopts = port['port'].get(edo_ext.EXTRADHCPOPTS)
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if dopts:
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opt_db = self._model_query(
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context, ExtraDhcpOpt).filter_by(port_id=id).all()
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# if there are currently no dhcp_options associated to
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# this port, Then just insert the new ones and be done.
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with context.session.begin(subtransactions=True):
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for upd_rec in dopts:
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for opt in opt_db:
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if opt['opt_name'] == upd_rec['opt_name']:
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# to handle deleting of a opt from the port.
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if upd_rec['opt_value'] is None:
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context.session.delete(opt)
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elif opt['opt_value'] != upd_rec['opt_value']:
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opt.update(
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{'opt_value': upd_rec['opt_value']})
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break
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else:
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if upd_rec['opt_value'] is not None:
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db = ExtraDhcpOpt(
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port_id=id,
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opt_name=upd_rec['opt_name'],
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opt_value=upd_rec['opt_value'])
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context.session.add(db)
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if updated_port:
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edolist = self._get_port_extra_dhcp_opts_binding(context, id)
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updated_port[edo_ext.EXTRADHCPOPTS] = edolist
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return bool(dopts)
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def _extend_port_dict_extra_dhcp_opt(self, res, port):
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res[edo_ext.EXTRADHCPOPTS] = [{'opt_name': dho.opt_name,
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'opt_value': dho.opt_value}
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for dho in port.dhcp_opts]
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return res
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db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
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attributes.PORTS, ['_extend_port_dict_extra_dhcp_opt'])
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