# 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 import sys from quantum.api.v2 import attributes from quantum.common import constants from quantum.common import exceptions as q_exc from quantum.common import topics from quantum.db import api as db_api from quantum.db import db_base_plugin_v2 from quantum.db import dhcp_rpc_base from quantum.db import l3_db from quantum.db import models_v2 from quantum.extensions import providernet as provider 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.common import constants as lconst from quantum.plugins.linuxbridge.db import l2network_db_v2 as db from quantum import policy LOG = logging.getLogger(__name__) class LinuxBridgeRpcCallbacks(dhcp_rpc_base.DhcpRpcCallbackMixin): # 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, rpc_context): self.rpc_context = rpc_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, rpc_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 = db.get_port_from_device(device[self.TAP_PREFIX_LEN:]) if port: binding = db.get_network_binding(db_api.get_session(), port['network_id']) entry = {'device': device, 'physical_network': binding.physical_network, 'vlan_id': 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 db.set_port_status(port['id'], constants.PORT_STATUS_ACTIVE) else: entry = {'device': device} LOG.debug("%s can not be found in database", device) return entry def update_device_down(self, rpc_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 = db.get_port_from_device(device[self.TAP_PREFIX_LEN:]) if port: entry = {'device': device, 'exists': True} # Set port status to DOWN db.set_port_status(port['id'], constants.PORT_STATUS_DOWN) 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, physical_network, vlan_id): self.fanout_cast(context, self.make_msg('port_update', port=port, physical_network=physical_network, vlan_id=vlan_id), topic=self.topic_port_update) class LinuxBridgePluginV2(db_base_plugin_v2.QuantumDbPluginV2, l3_db.L3_NAT_db_mixin): """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. """ # This attribute specifies whether the plugin supports or not # bulk operations. Name mangling is used in order to ensure it # is qualified by class __native_bulk_support = True supported_extension_aliases = ["provider", "os-quantum-router"] def __init__(self): db.initialize() self._parse_network_vlan_ranges() db.sync_network_states(self.network_vlan_ranges) self.agent_rpc = cfg.CONF.AGENT.rpc self._setup_rpc() LOG.debug("Linux Bridge Plugin initialization complete") def _setup_rpc(self): # RPC support self.topic = topics.PLUGIN self.rpc_context = context.RequestContext('quantum', 'quantum', is_admin=False) self.conn = rpc.create_connection(new=True) self.callbacks = LinuxBridgeRpcCallbacks(self.rpc_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) def _parse_network_vlan_ranges(self): self.network_vlan_ranges = {} for entry in cfg.CONF.VLANS.network_vlan_ranges: if ':' in entry: try: physical_network, vlan_min, vlan_max = entry.split(':') self._add_network_vlan_range(physical_network, int(vlan_min), int(vlan_max)) except ValueError as ex: LOG.error("Invalid network VLAN range: \'%s\' - %s" % (entry, ex)) sys.exit(1) else: self._add_network(entry) LOG.debug("network VLAN ranges: %s" % self.network_vlan_ranges) def _add_network_vlan_range(self, physical_network, vlan_min, vlan_max): self._add_network(physical_network) self.network_vlan_ranges[physical_network].append((vlan_min, vlan_max)) def _add_network(self, physical_network): if physical_network not in self.network_vlan_ranges: self.network_vlan_ranges[physical_network] = [] # REVISIT(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): binding = db.get_network_binding(context.session, network['id']) network[provider.PHYSICAL_NETWORK] = binding.physical_network if binding.vlan_id == lconst.FLAT_VLAN_ID: network[provider.NETWORK_TYPE] = 'flat' network[provider.SEGMENTATION_ID] = None else: network[provider.NETWORK_TYPE] = 'vlan' network[provider.SEGMENTATION_ID] = binding.vlan_id def _process_provider_create(self, context, attrs): network_type = attrs.get(provider.NETWORK_TYPE) physical_network = attrs.get(provider.PHYSICAL_NETWORK) segmentation_id = attrs.get(provider.SEGMENTATION_ID) network_type_set = attributes.is_attr_set(network_type) physical_network_set = attributes.is_attr_set(physical_network) segmentation_id_set = attributes.is_attr_set(segmentation_id) if not (network_type_set or physical_network_set or segmentation_id_set): return (None, None, None) # Authorize before exposing plugin details to client self._enforce_provider_set_auth(context, attrs) if not network_type_set: msg = _("provider:network_type required") raise q_exc.InvalidInput(error_message=msg) elif network_type == 'flat': if segmentation_id_set: msg = _("provider:segmentation_id specified for flat network") raise q_exc.InvalidInput(error_message=msg) else: segmentation_id = lconst.FLAT_VLAN_ID elif network_type == 'vlan': if not segmentation_id_set: msg = _("provider:segmentation_id required") raise q_exc.InvalidInput(error_message=msg) if segmentation_id < 1 or segmentation_id > 4094: msg = _("provider:segmentation_id out of range " "(1 through 4094)") raise q_exc.InvalidInput(error_message=msg) else: msg = _("invalid provider:network_type %s" % network_type) raise q_exc.InvalidInput(error_message=msg) if physical_network_set: if physical_network not in self.network_vlan_ranges: msg = _("unknown provider:physical_network %s" % physical_network) raise q_exc.InvalidInput(error_message=msg) elif 'default' in self.network_vlan_ranges: physical_network = 'default' else: msg = _("provider:physical_network required") raise q_exc.InvalidInput(error_message=msg) return (network_type, physical_network, segmentation_id) def _check_provider_update(self, context, attrs): network_type = attrs.get(provider.NETWORK_TYPE) physical_network = attrs.get(provider.PHYSICAL_NETWORK) segmentation_id = attrs.get(provider.SEGMENTATION_ID) network_type_set = attributes.is_attr_set(network_type) physical_network_set = attributes.is_attr_set(physical_network) segmentation_id_set = attributes.is_attr_set(segmentation_id) if not (network_type_set or physical_network_set or segmentation_id_set): return # Authorize before exposing plugin details to client self._enforce_provider_set_auth(context, attrs) msg = _("plugin does not support updating provider attributes") raise q_exc.InvalidInput(error_message=msg) def create_network(self, context, network): (network_type, physical_network, vlan_id) = self._process_provider_create(context, network['network']) session = context.session with session.begin(subtransactions=True): if not network_type: physical_network, vlan_id = db.reserve_network(session) else: db.reserve_specific_network(session, physical_network, vlan_id) net = super(LinuxBridgePluginV2, self).create_network(context, network) db.add_network_binding(session, net['id'], physical_network, vlan_id) self._extend_network_dict(context, net) # note - exception will rollback entire transaction return net def update_network(self, context, id, network): self._check_provider_update(context, network['network']) session = context.session with session.begin(subtransactions=True): net = super(LinuxBridgePluginV2, self).update_network(context, id, network) self._extend_network_dict(context, net) return net def delete_network(self, context, id): session = context.session with session.begin(subtransactions=True): binding = db.get_network_binding(session, id) result = super(LinuxBridgePluginV2, self).delete_network(context, id) db.release_network(session, binding.physical_network, binding.vlan_id, self.network_vlan_ranges) # the network_binding record is deleted via cascade from # the network record, so explicit removal is not necessary if self.agent_rpc: self.notifier.network_delete(self.rpc_context, id) def get_network(self, context, id, fields=None): net = super(LinuxBridgePluginV2, self).get_network(context, id, None) self._extend_network_dict(context, net) return self._fields(net, fields) def get_networks(self, context, filters=None, fields=None): nets = super(LinuxBridgePluginV2, self).get_networks(context, filters, None) 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.agent_rpc: original_port = super(LinuxBridgePluginV2, self).get_port(context, id) port = super(LinuxBridgePluginV2, self).update_port(context, id, port) if self.agent_rpc: if original_port['admin_state_up'] != port['admin_state_up']: binding = db.get_network_binding(context.session, port['network_id']) self.notifier.port_update(self.rpc_context, port, binding.physical_network, binding.vlan_id) return port def delete_port(self, context, id, l3_port_check=True): # if needed, check to see if this is a port owned by # and l3-router. If so, we should prevent deletion. if l3_port_check: self.prevent_l3_port_deletion(context, id) self.disassociate_floatingips(context, id) return super(LinuxBridgePluginV2, self).delete_port(context, id)