OpenStack Networking (Neutron)
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# Copyright (c) 2015 Red Hat Inc.
# All Rights Reserved.
#
# 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.
from neutron_lib.db import api as db_api
from neutron_lib.exceptions import qos as qos_exc
from neutron_lib.plugins import constants as plugin_constants
from neutron_lib.plugins import directory
from neutron_lib.services.qos import constants as qos_consts
from neutron.core_extensions import base
from neutron.objects.qos import policy as policy_object
class QosCoreResourceExtension(base.CoreResourceExtension):
@property
def plugin_loaded(self):
if not hasattr(self, '_plugin_loaded'):
self._plugin_loaded = (
plugin_constants.QOS in directory.get_plugins())
return self._plugin_loaded
def _check_policy_change_permission(self, context, old_policy):
"""An existing policy can be modified only if one of the following is
true:
the policy's tenant is the context's tenant
the policy is shared with the tenant
Using is_accessible expresses these conditions.
"""
if not (policy_object.QosPolicy.is_accessible(context, old_policy)):
raise qos_exc.PolicyRemoveAuthorizationError(
policy_id=old_policy.id)
def _update_port_policy(self, context, port, port_changes):
old_policy = policy_object.QosPolicy.get_port_policy(
context.elevated(), port['id'])
if old_policy:
self._check_policy_change_permission(context, old_policy)
old_policy.detach_port(port['id'])
qos_policy_id = port_changes.get(qos_consts.QOS_POLICY_ID)
if qos_policy_id is not None:
policy = policy_object.QosPolicy.get_policy_obj(
context, qos_policy_id)
policy.attach_port(port['id'])
port[qos_consts.QOS_POLICY_ID] = qos_policy_id
def _create_network_policy(self, context, network, network_changes):
qos_policy_id = network_changes.get(qos_consts.QOS_POLICY_ID)
if not qos_policy_id:
policy_obj = policy_object.QosPolicyDefault.get_object(
context, project_id=network['project_id'])
if policy_obj is not None:
qos_policy_id = policy_obj.qos_policy_id
if qos_policy_id is not None:
policy = policy_object.QosPolicy.get_policy_obj(
context, qos_policy_id)
policy.attach_network(network['id'])
network[qos_consts.QOS_POLICY_ID] = qos_policy_id
def _update_network_policy(self, context, network, network_changes):
old_policy = policy_object.QosPolicy.get_network_policy(
context.elevated(), network['id'])
if old_policy:
self._check_policy_change_permission(context, old_policy)
old_policy.detach_network(network['id'])
qos_policy_id = network_changes.get(qos_consts.QOS_POLICY_ID)
if qos_policy_id is not None:
policy = policy_object.QosPolicy.get_policy_obj(
context, qos_policy_id)
policy.attach_network(network['id'])
network[qos_consts.QOS_POLICY_ID] = qos_policy_id
def _exec(self, method_name, context, kwargs):
with db_api.CONTEXT_WRITER.using(context):
return getattr(self, method_name)(context=context, **kwargs)
def process_fields(self, context, resource_type, event_type,
requested_resource, actual_resource):
if (qos_consts.QOS_POLICY_ID in requested_resource and
self.plugin_loaded):
method_name = ('_%(event)s_%(resource)s_policy' %
{'event': event_type, 'resource': resource_type})
self._exec(method_name, context,
{resource_type: actual_resource,
"%s_changes" % resource_type: requested_resource})
def extract_fields(self, resource_type, resource):
if not self.plugin_loaded:
return {}
binding = resource['qos_policy_binding']
qos_policy_id = binding['policy_id'] if binding else None
retval = {qos_consts.QOS_POLICY_ID: qos_policy_id}
if resource_type == base.PORT:
network_binding = resource.get('qos_network_policy_binding')
qos_net_policy_id = (network_binding['policy_id'] if
network_binding else None)
retval[qos_consts.QOS_NETWORK_POLICY_ID] = qos_net_policy_id
return retval