109 lines
4.5 KiB
Python
109 lines
4.5 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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import os
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from oslo_config import cfg
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from neutron.agent import securitygroups_rpc
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from neutron.common import constants
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from neutron.extensions import portbindings
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from neutron.plugins.common import constants as p_constants
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from neutron.plugins.ml2 import driver_api as api
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from neutron.plugins.ml2.drivers import mech_agent
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from neutron.plugins.ml2.drivers.openvswitch.agent.common \
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import constants as a_const
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from neutron.services.qos import qos_consts
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IPTABLES_FW_DRIVER_FULL = ("neutron.agent.linux.iptables_firewall."
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"OVSHybridIptablesFirewallDriver")
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class OpenvswitchMechanismDriver(mech_agent.SimpleAgentMechanismDriverBase):
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"""Attach to networks using openvswitch L2 agent.
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The OpenvswitchMechanismDriver integrates the ml2 plugin with the
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openvswitch L2 agent. Port binding with this driver requires the
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openvswitch agent to be running on the port's host, and that agent
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to have connectivity to at least one segment of the port's
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network.
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"""
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supported_qos_rule_types = [qos_consts.RULE_TYPE_BANDWIDTH_LIMIT]
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def __init__(self):
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sg_enabled = securitygroups_rpc.is_firewall_enabled()
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hybrid_plug_required = (cfg.CONF.SECURITYGROUP.firewall_driver in (
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IPTABLES_FW_DRIVER_FULL, 'iptables_hybrid')) and sg_enabled
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vif_details = {portbindings.CAP_PORT_FILTER: sg_enabled,
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portbindings.OVS_HYBRID_PLUG: hybrid_plug_required}
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super(OpenvswitchMechanismDriver, self).__init__(
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constants.AGENT_TYPE_OVS,
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portbindings.VIF_TYPE_OVS,
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vif_details)
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def get_allowed_network_types(self, agent):
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return (agent['configurations'].get('tunnel_types', []) +
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[p_constants.TYPE_LOCAL, p_constants.TYPE_FLAT,
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p_constants.TYPE_VLAN])
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def get_mappings(self, agent):
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return agent['configurations'].get('bridge_mappings', {})
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def check_vlan_transparency(self, context):
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"""Currently Openvswitch driver doesn't support vlan transparency."""
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return False
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def try_to_bind_segment_for_agent(self, context, segment, agent):
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if self.check_segment_for_agent(segment, agent):
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context.set_binding(segment[api.ID],
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self.get_vif_type(agent, context),
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self.get_vif_details(agent, context))
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return True
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else:
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return False
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def get_vif_type(self, agent, context):
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caps = agent['configurations'].get('ovs_capabilities', {})
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if (a_const.OVS_DPDK_VHOST_USER in caps.get('iface_types', []) and
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agent['configurations'].get('datapath_type') ==
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a_const.OVS_DATAPATH_NETDEV):
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return portbindings.VIF_TYPE_VHOST_USER
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return self.vif_type
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def get_vif_details(self, agent, context):
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if (agent['configurations'].get('datapath_type') !=
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a_const.OVS_DATAPATH_NETDEV):
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return self.vif_details
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caps = agent['configurations'].get('ovs_capabilities', {})
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if a_const.OVS_DPDK_VHOST_USER in caps.get('iface_types', []):
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sock_path = self.agent_vhu_sockpath(agent, context.current['id'])
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return {
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portbindings.CAP_PORT_FILTER: False,
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portbindings.VHOST_USER_MODE:
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portbindings.VHOST_USER_MODE_CLIENT,
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portbindings.VHOST_USER_OVS_PLUG: True,
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portbindings.VHOST_USER_SOCKET: sock_path
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}
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return self.vif_details
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@staticmethod
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def agent_vhu_sockpath(agent, port_id):
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"""Return the agent's vhost-user socket path for a given port"""
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sockdir = agent['configurations'].get('vhostuser_socket_dir',
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a_const.VHOST_USER_SOCKET_DIR)
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sock_name = (constants.VHOST_USER_DEVICE_PREFIX + port_id)[:14]
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return os.path.join(sockdir, sock_name)
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