81 lines
3.1 KiB
Python
81 lines
3.1 KiB
Python
# Copyright (c) 2016 IBM Corp.
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#
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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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from neutron_lib import constants
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from oslo_log import log
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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.macvtap import macvtap_common
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from neutron.plugins.ml2.drivers import mech_agent
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LOG = log.getLogger(__name__)
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MACVTAP_MODE_BRIDGE = 'bridge'
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class MacvtapMechanismDriver(mech_agent.SimpleAgentMechanismDriverBase):
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"""Attach to networks using Macvtap L2 agent.
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The MacvtapMechanismDriver integrates the ml2 plugin with the
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macvtap L2 agent. Port binding with this driver requires the
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macvtap 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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def __init__(self):
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super(MacvtapMechanismDriver, self).__init__(
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constants.AGENT_TYPE_MACVTAP,
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portbindings.VIF_TYPE_MACVTAP,
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{portbindings.CAP_PORT_FILTER: False})
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def get_allowed_network_types(self, agent):
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return [p_constants.TYPE_FLAT, p_constants.TYPE_VLAN]
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def get_mappings(self, agent):
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return agent['configurations'].get('interface_mappings', {})
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def check_vlan_transparency(self, context):
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"""Macvtap driver vlan transparency support."""
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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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vif_details_segment = self.vif_details
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mappings = self.get_mappings(agent)
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interface = mappings[segment['physical_network']]
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network_type = segment[api.NETWORK_TYPE]
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if network_type == p_constants.TYPE_VLAN:
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vlan_id = segment[api.SEGMENTATION_ID]
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macvtap_src = macvtap_common.get_vlan_device_name(interface,
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vlan_id)
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vif_details_segment['vlan'] = vlan_id
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else:
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macvtap_src = interface
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vif_details_segment['physical_interface'] = interface
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vif_details_segment['macvtap_source'] = macvtap_src
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vif_details_segment['macvtap_mode'] = MACVTAP_MODE_BRIDGE
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LOG.debug("Macvtap vif_details added to context binding: %s",
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vif_details_segment)
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context.set_binding(segment[api.ID], self.vif_type,
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vif_details_segment)
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return True
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return False
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