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231 lines
7.6 KiB
231 lines
7.6 KiB
# 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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from oslo_log import log
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from oslo_serialization import jsonutils
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from neutron.common import constants
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from neutron.extensions import portbindings
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from neutron.i18n import _LW
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from neutron.plugins.ml2 import db
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from neutron.plugins.ml2 import driver_api as api
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LOG = log.getLogger(__name__)
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class MechanismDriverContext(object):
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"""MechanismDriver context base class."""
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def __init__(self, plugin, plugin_context):
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self._plugin = plugin
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# This temporarily creates a reference loop, but the
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# lifetime of PortContext is limited to a single
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# method call of the plugin.
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self._plugin_context = plugin_context
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class NetworkContext(MechanismDriverContext, api.NetworkContext):
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def __init__(self, plugin, plugin_context, network,
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original_network=None):
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super(NetworkContext, self).__init__(plugin, plugin_context)
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self._network = network
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self._original_network = original_network
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self._segments = db.get_network_segments(plugin_context.session,
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network['id'])
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@property
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def current(self):
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return self._network
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@property
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def original(self):
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return self._original_network
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@property
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def network_segments(self):
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return self._segments
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class SubnetContext(MechanismDriverContext, api.SubnetContext):
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def __init__(self, plugin, plugin_context, subnet, original_subnet=None):
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super(SubnetContext, self).__init__(plugin, plugin_context)
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self._subnet = subnet
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self._original_subnet = original_subnet
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@property
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def current(self):
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return self._subnet
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@property
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def original(self):
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return self._original_subnet
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class PortContext(MechanismDriverContext, api.PortContext):
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def __init__(self, plugin, plugin_context, port, network, binding,
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binding_levels, original_port=None):
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super(PortContext, self).__init__(plugin, plugin_context)
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self._port = port
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self._original_port = original_port
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self._network_context = NetworkContext(plugin, plugin_context,
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network)
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self._binding = binding
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self._binding_levels = binding_levels
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self._segments_to_bind = None
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self._new_bound_segment = None
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self._next_segments_to_bind = None
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if original_port:
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self._original_binding_levels = self._binding_levels
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else:
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self._original_binding_levels = None
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self._new_port_status = None
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# The following methods are for use by the ML2 plugin and are not
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# part of the driver API.
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def _prepare_to_bind(self, segments_to_bind):
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self._segments_to_bind = segments_to_bind
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self._new_bound_segment = None
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self._next_segments_to_bind = None
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def _clear_binding_levels(self):
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self._binding_levels = []
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def _push_binding_level(self, binding_level):
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self._binding_levels.append(binding_level)
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def _pop_binding_level(self):
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return self._binding_levels.pop()
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# The following implement the abstract methods and properties of
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# the driver API.
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@property
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def current(self):
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return self._port
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@property
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def original(self):
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return self._original_port
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@property
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def status(self):
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# REVISIT(rkukura): Eliminate special DVR case as part of
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# resolving bug 1367391?
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if self._port['device_owner'] == constants.DEVICE_OWNER_DVR_INTERFACE:
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return self._binding.status
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return self._port['status']
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@property
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def original_status(self):
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return self._original_port['status']
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@property
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def network(self):
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return self._network_context
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@property
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def binding_levels(self):
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if self._binding_levels:
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return [{
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api.BOUND_DRIVER: level.driver,
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api.BOUND_SEGMENT: self._expand_segment(level.segment_id)
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} for level in self._binding_levels]
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@property
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def original_binding_levels(self):
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if self._original_binding_levels:
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return [{
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api.BOUND_DRIVER: level.driver,
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api.BOUND_SEGMENT: self._expand_segment(level.segment_id)
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} for level in self._original_binding_levels]
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@property
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def top_bound_segment(self):
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if self._binding_levels:
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return self._expand_segment(self._binding_levels[0].segment_id)
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@property
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def original_top_bound_segment(self):
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if self._original_binding_levels:
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return self._expand_segment(
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self._original_binding_levels[0].segment_id)
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@property
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def bottom_bound_segment(self):
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if self._binding_levels:
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return self._expand_segment(self._binding_levels[-1].segment_id)
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@property
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def original_bottom_bound_segment(self):
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if self._original_binding_levels:
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return self._expand_segment(
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self._original_binding_levels[-1].segment_id)
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def _expand_segment(self, segment_id):
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segment = db.get_segment_by_id(self._plugin_context.session,
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segment_id)
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if not segment:
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LOG.warning(_LW("Could not expand segment %s"), segment_id)
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return segment
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@property
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def host(self):
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# REVISIT(rkukura): Eliminate special DVR case as part of
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# resolving bug 1367391?
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if self._port['device_owner'] == constants.DEVICE_OWNER_DVR_INTERFACE:
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return self._binding.host
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return self._port.get(portbindings.HOST_ID)
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@property
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def original_host(self):
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return self._original_port.get(portbindings.HOST_ID)
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@property
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def segments_to_bind(self):
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return self._segments_to_bind
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def host_agents(self, agent_type):
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return self._plugin.get_agents(self._plugin_context,
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filters={'agent_type': [agent_type],
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'host': [self._binding.host]})
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def set_binding(self, segment_id, vif_type, vif_details,
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status=None):
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# TODO(rkukura) Verify binding allowed, segment in network
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self._new_bound_segment = segment_id
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self._binding.vif_type = vif_type
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self._binding.vif_details = jsonutils.dumps(vif_details)
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self._new_port_status = status
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def continue_binding(self, segment_id, next_segments_to_bind):
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# TODO(rkukura) Verify binding allowed, segment in network
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self._new_bound_segment = segment_id
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self._next_segments_to_bind = next_segments_to_bind
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def allocate_dynamic_segment(self, segment):
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network_id = self._network_context.current['id']
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return self._plugin.type_manager.allocate_dynamic_segment(
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self._plugin_context.session, network_id, segment)
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def release_dynamic_segment(self, segment_id):
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return self._plugin.type_manager.release_dynamic_segment(
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self._plugin_context.session, segment_id)
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