213 lines
8.3 KiB
Python
213 lines
8.3 KiB
Python
# 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.api.definitions import portbindings
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from neutron_lib.callbacks import events
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from neutron_lib.callbacks import registry
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from neutron_lib import constants as lib_constants
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from neutron_lib import exceptions
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from neutron_lib.plugins import utils
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from neutron_lib.services.qos import constants as qos_consts
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from oslo_log import log as logging
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from neutron.api.rpc.callbacks import events as rpc_events
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from neutron.api.rpc.callbacks.producer import registry as rpc_registry
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from neutron.api.rpc.callbacks import resources
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from neutron.api.rpc.handlers import resources_rpc
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from neutron.objects.qos import policy as policy_object
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from neutron.services.qos import constants as qos_constants
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LOG = logging.getLogger(__name__)
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SKIPPED_VIF_TYPES = [
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portbindings.VIF_TYPE_UNBOUND,
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portbindings.VIF_TYPE_BINDING_FAILED
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]
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class QosServiceDriverManager(object):
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def __init__(self):
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self._drivers = []
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self.rpc_notifications_required = False
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rpc_registry.provide(self._get_qos_policy_cb, resources.QOS_POLICY)
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# notify any registered QoS driver that we're ready, those will
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# call the driver manager back with register_driver if they
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# are enabled
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registry.publish(qos_consts.QOS_PLUGIN, events.AFTER_INIT, self)
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if self.rpc_notifications_required:
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self.push_api = resources_rpc.ResourcesPushRpcApi()
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@staticmethod
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def _get_qos_policy_cb(resource, policy_id, **kwargs):
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context = kwargs.get('context')
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if context is None:
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LOG.warning(
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'Received %(resource)s %(policy_id)s without context',
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{'resource': resource, 'policy_id': policy_id})
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return
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policy = policy_object.QosPolicy.get_object(context, id=policy_id)
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return policy
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@staticmethod
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def _validate_vnic_type(driver, vnic_type, port_id):
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if driver.is_vnic_compatible(vnic_type):
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return True
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LOG.debug("vnic_type %(vnic_type)s of port %(port_id)s "
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"is not compatible with QoS driver %(driver)s",
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{'vnic_type': vnic_type,
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'port_id': port_id,
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'driver': driver.name})
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return False
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@staticmethod
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def _validate_vif_type(driver, vif_type, port_id):
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if driver.is_vif_type_compatible(vif_type):
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return True
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LOG.debug("vif_type %(vif_type)s of port %(port_id)s "
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"is not compatible with QoS driver %(driver)s",
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{'vif_type': vif_type,
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'port_id': port_id,
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'driver': driver.name})
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return False
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@staticmethod
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def _parse_parameter_values(parameter_values):
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validator, possible_values = list(parameter_values.items())[0]
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if validator == 'type:range':
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parameter_values = {
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"start": possible_values[0],
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"end": possible_values[1]
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}
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parameter_type = lib_constants.VALUES_TYPE_RANGE
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elif validator == 'type:values':
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parameter_values = possible_values
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parameter_type = lib_constants.VALUES_TYPE_CHOICES
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return parameter_values, parameter_type
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def call(self, method_name, *args, **kwargs):
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"""Helper method for calling a method across all extension drivers."""
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exc_list = []
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for driver in self._drivers:
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try:
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getattr(driver, method_name)(*args, **kwargs)
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except Exception as exc:
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exception_msg = ("Extension driver '%(name)s' failed in "
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"%(method)s")
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exception_data = {'name': driver.name, 'method': method_name}
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LOG.exception(exception_msg, exception_data)
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exc_list.append(exc)
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if exc_list:
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raise exceptions.DriverCallError(exc_list=exc_list)
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if self.rpc_notifications_required:
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context = kwargs.get('context') or args[0]
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policy_obj = kwargs.get('policy_obj') or args[1]
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# we don't push create_policy events since policies are empty
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# on creation, they only become of any use when rules get
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# attached to them.
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if method_name == qos_consts.UPDATE_POLICY:
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self.push_api.push(context, [policy_obj], rpc_events.UPDATED)
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elif method_name == qos_consts.DELETE_POLICY:
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self.push_api.push(context, [policy_obj], rpc_events.DELETED)
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def register_driver(self, driver):
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"""Register driver with qos plugin.
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This method is called from drivers on INIT event.
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"""
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self._drivers.append(driver)
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self.rpc_notifications_required |= driver.requires_rpc_notifications
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def validate_rule_for_port(self, context, rule, port):
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port_binding = utils.get_port_binding_by_status_and_host(
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port.bindings, lib_constants.ACTIVE, raise_if_not_found=True,
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port_id=port['id'])
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for driver in self._drivers:
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vif_type = port_binding.vif_type
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if vif_type not in SKIPPED_VIF_TYPES:
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if not self._validate_vif_type(driver, vif_type, port['id']):
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continue
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else:
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vnic_type = port_binding.vnic_type
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if not self._validate_vnic_type(driver, vnic_type, port['id']):
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continue
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if (driver.is_rule_supported(rule) and
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driver.validate_rule_for_port(context, rule, port)):
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return True
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return False
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def validate_rule_for_network(self, context, rule, network_id):
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for driver in self._drivers:
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if (driver.is_rule_supported(rule) and
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driver.validate_rule_for_network(context, rule,
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network_id)):
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return True
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return False
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@property
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def supported_rule_types(self):
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if not self._drivers:
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return []
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rule_types = set(qos_constants.VALID_RULE_TYPES)
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# Recalculate on every call to allow drivers determine supported rule
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# types dynamically
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for driver in self._drivers:
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new_rule_types = rule_types & set(driver.supported_rules)
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dropped_rule_types = rule_types - new_rule_types
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if dropped_rule_types:
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LOG.debug("%(rule_types)s rule types disabled "
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"because enabled %(driver)s does not support them",
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{'rule_types': ', '.join(dropped_rule_types),
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'driver': driver.name})
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rule_types = new_rule_types
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LOG.debug("Supported QoS rule types "
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"(common subset for all loaded QoS drivers): %s", rule_types)
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return rule_types
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def supported_rule_type_details(self, rule_type_name):
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if not self._drivers:
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return []
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rule_type_drivers = []
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for driver in self._drivers:
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if rule_type_name in driver.supported_rules:
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supported_parameters = []
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rule_parameters = driver.supported_rules.get(rule_type_name)
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for name, values in rule_parameters.items():
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parameter_values, parameter_type = (
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self._parse_parameter_values(values))
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supported_parameters.append({
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"parameter_name": name,
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"parameter_values": parameter_values,
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"parameter_type": parameter_type
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})
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rule_type_drivers.append({
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"name": driver.name,
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"supported_parameters": supported_parameters
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})
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return rule_type_drivers
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