# Copyright (c) 2012 OpenStack, LLC. # # 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. import logging from quantum.api import api_common from quantum.api.v2 import attributes from quantum.common import topics from quantum.db import db_base_plugin_v2 from quantum.db import models_v2 from quantum.openstack.common import context from quantum.openstack.common import cfg from quantum.openstack.common import rpc from quantum.openstack.common.rpc import dispatcher from quantum.openstack.common.rpc import proxy from quantum.plugins.linuxbridge.db import l2network_db as cdb from quantum import policy LOG = logging.getLogger(__name__) class LinuxBridgeRpcCallbacks(): # Set RPC API version to 1.0 by default. RPC_API_VERSION = '1.0' # Device names start with "tap" TAP_PREFIX_LEN = 3 def __init__(self, context): self.context = context def create_rpc_dispatcher(self): '''Get the rpc dispatcher for this manager. If a manager would like to set an rpc API version, or support more than one class as the target of rpc messages, override this method. ''' return dispatcher.RpcDispatcher([self]) def get_device_details(self, context, **kwargs): """Agent requests device details""" agent_id = kwargs.get('agent_id') device = kwargs.get('device') LOG.debug("Device %s details requested from %s", device, agent_id) port = cdb.get_port_from_device(device[self.TAP_PREFIX_LEN:]) if port: vlan_binding = cdb.get_vlan_binding(port['network_id']) entry = {'device': device, 'vlan_id': vlan_binding['vlan_id'], 'network_id': port['network_id'], 'port_id': port['id'], 'admin_state_up': port['admin_state_up']} # Set the port status to UP cdb.set_port_status(port['id'], api_common.PORT_STATUS_UP) else: entry = {'device': device} LOG.debug("%s can not be found in database", device) return entry def update_device_down(self, context, **kwargs): """Device no longer exists on agent""" # (TODO) garyk - live migration and port status agent_id = kwargs.get('agent_id') device = kwargs.get('device') LOG.debug("Device %s no longer exists on %s", device, agent_id) port = cdb.get_port_from_device(device[self.TAP_PREFIX_LEN:]) if port: entry = {'device': device, 'exists': True} # Set port status to DOWN cdb.set_port_status(port['id'], api_common.PORT_STATUS_UP) else: entry = {'device': device, 'exists': False} LOG.debug("%s can not be found in database", device) return entry class AgentNotifierApi(proxy.RpcProxy): '''Agent side of the linux bridge rpc API. API version history: 1.0 - Initial version. ''' BASE_RPC_API_VERSION = '1.0' def __init__(self, topic): super(AgentNotifierApi, self).__init__( topic=topic, default_version=self.BASE_RPC_API_VERSION) self.topic_network_delete = topics.get_topic_name(topic, topics.NETWORK, topics.DELETE) self.topic_port_update = topics.get_topic_name(topic, topics.PORT, topics.UPDATE) def network_delete(self, context, network_id): self.fanout_cast(context, self.make_msg('network_delete', network_id=network_id), topic=self.topic_network_delete) def port_update(self, context, port, vlan_id): self.fanout_cast(context, self.make_msg('port_update', port=port, vlan_id=vlan_id), topic=self.topic_port_update) class LinuxBridgePluginV2(db_base_plugin_v2.QuantumDbPluginV2): """Implement the Quantum abstractions using Linux bridging. A new VLAN is created for each network. An agent is relied upon to perform the actual Linux bridge configuration on each host. The provider extension is also supported. As discussed in https://bugs.launchpad.net/quantum/+bug/1023156, this class could be simplified, and filtering on extended attributes could be handled, by adding support for extended attributes to the QuantumDbPluginV2 base class. When that occurs, this class should be updated to take advantage of it. """ supported_extension_aliases = ["provider"] def __init__(self): cdb.initialize(base=models_v2.model_base.BASEV2) self.rpc = cfg.CONF.AGENT.rpc if cfg.CONF.AGENT.rpc and cfg.CONF.AGENT.target_v2_api: self.setup_rpc() if not cfg.CONF.AGENT.target_v2_api: self.rpc = False LOG.debug("Linux Bridge Plugin initialization complete") def setup_rpc(self): # RPC support self.topic = topics.PLUGIN self.context = context.RequestContext('quantum', 'quantum', is_admin=False) self.conn = rpc.create_connection(new=True) self.callbacks = LinuxBridgeRpcCallbacks(self.context) self.dispatcher = self.callbacks.create_rpc_dispatcher() self.conn.create_consumer(self.topic, self.dispatcher, fanout=False) # Consume from all consumers in a thread self.conn.consume_in_thread() self.notifier = AgentNotifierApi(topics.AGENT) # TODO(rkukura) Use core mechanism for attribute authorization # when available. def _check_provider_view_auth(self, context, network): return policy.check(context, "extension:provider_network:view", network) def _enforce_provider_set_auth(self, context, network): return policy.enforce(context, "extension:provider_network:set", network) def _extend_network_dict(self, context, network): if self._check_provider_view_auth(context, network): vlan_binding = cdb.get_vlan_binding(network['id']) network['provider:vlan_id'] = vlan_binding['vlan_id'] def create_network(self, context, network): net = super(LinuxBridgePluginV2, self).create_network(context, network) try: vlan_id = network['network'].get('provider:vlan_id') if vlan_id not in (None, attributes.ATTR_NOT_SPECIFIED): self._enforce_provider_set_auth(context, net) cdb.reserve_specific_vlanid(int(vlan_id)) else: vlan_id = cdb.reserve_vlanid() cdb.add_vlan_binding(vlan_id, net['id']) self._extend_network_dict(context, net) except: super(LinuxBridgePluginV2, self).delete_network(context, net['id']) raise return net def update_network(self, context, id, network): net = super(LinuxBridgePluginV2, self).update_network(context, id, network) self._extend_network_dict(context, net) return net def delete_network(self, context, id): vlan_binding = cdb.get_vlan_binding(id) result = super(LinuxBridgePluginV2, self).delete_network(context, id) cdb.release_vlanid(vlan_binding['vlan_id']) if self.rpc: self.notifier.network_delete(self.context, id) return result def get_network(self, context, id, fields=None, verbose=None): net = super(LinuxBridgePluginV2, self).get_network(context, id, None, verbose) self._extend_network_dict(context, net) return self._fields(net, fields) def get_networks(self, context, filters=None, fields=None, verbose=None): nets = super(LinuxBridgePluginV2, self).get_networks(context, filters, None, verbose) for net in nets: self._extend_network_dict(context, net) # TODO(rkukura): Filter on extended attributes. return [self._fields(net, fields) for net in nets] def update_port(self, context, id, port): if self.rpc: original_port = super(LinuxBridgePluginV2, self).get_port(context, id) port = super(LinuxBridgePluginV2, self).update_port(context, id, port) if self.rpc: if original_port['admin_state_up'] != port['admin_state_up']: vlan_binding = cdb.get_vlan_binding(port['network_id']) self.notifier.port_update(self.context, port, vlan_binding['vlan_id']) return port