207 lines
8.8 KiB
Python
207 lines
8.8 KiB
Python
# Copyright 2014 Mellanox Technologies, Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import uuid
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from neutron_lib.api.definitions import portbindings
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from neutron_lib import constants
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from neutron_lib.plugins.ml2 import api
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from oslo_config import cfg
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from oslo_log import log
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from neutron._i18n import _
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from neutron.conf.plugins.ml2.drivers.mech_sriov import mech_sriov_conf
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from neutron.plugins.ml2.drivers import mech_agent
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from neutron.plugins.ml2.drivers.mech_sriov.mech_driver \
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import exceptions as exc
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from neutron.services.qos.drivers.sriov import driver as sriov_qos_driver
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LOG = log.getLogger(__name__)
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FLAT_VLAN = 0
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mech_sriov_conf.register_sriov_mech_driver_opts()
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class SriovNicSwitchMechanismDriver(mech_agent.SimpleAgentMechanismDriverBase):
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"""Mechanism Driver for SR-IOV capable NIC based switching.
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The SriovNicSwitchMechanismDriver integrates the ml2 plugin with the
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sriovNicSwitch L2 agent depending on configuration option.
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Port binding with this driver may require the sriovNicSwitch agent
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to be running on the port's host, and that agent to have connectivity
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to at least one segment of the port's network.
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L2 agent is not essential for port binding; port binding is handled by
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VIF Driver via libvirt domain XML.
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L2 Agent presents in order to manage port update events.
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"""
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resource_provider_uuid5_namespace = uuid.UUID(
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'87f1895c-73bb-11e8-9008-c4d987b2a692')
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def __init__(self,
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agent_type=constants.AGENT_TYPE_NIC_SWITCH,
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vif_details={portbindings.CAP_PORT_FILTER: False,
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portbindings.VIF_DETAILS_CONNECTIVITY:
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portbindings.CONNECTIVITY_L2},
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supported_vnic_types=[portbindings.VNIC_DIRECT,
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portbindings.VNIC_MACVTAP,
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portbindings.VNIC_DIRECT_PHYSICAL]):
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"""Initialize base class for SriovNicSwitch L2 agent type.
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:param agent_type: Constant identifying agent type in agents_db
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:param vif_details: Dictionary with details for VIF driver when bound
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:param supported_vnic_types: The binding:vnic_type values we can bind
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"""
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self.agent_type = agent_type
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# TODO(lajoskatona): move this prohibition to
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# SimpleAgentMechanismDriverBase. By that, prohibition and validation
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# of the vnic_types would be available for all mechanism drivers.
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self.supported_vnic_types = self.prohibit_list_supported_vnic_types(
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vnic_types=supported_vnic_types,
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prohibit_list=cfg.CONF.SRIOV_DRIVER.vnic_type_prohibit_list
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)
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# NOTE(ndipanov): PF passthrough requires a different vif type
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self.vnic_type_for_vif_type = (
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{vtype: portbindings.VIF_TYPE_HOSTDEV_PHY
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if vtype == portbindings.VNIC_DIRECT_PHYSICAL
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else portbindings.VIF_TYPE_HW_VEB
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for vtype in self.supported_vnic_types})
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self.vif_details = vif_details
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sriov_qos_driver.register()
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def get_allowed_network_types(self, agent):
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return (constants.TYPE_FLAT, constants.TYPE_VLAN)
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def get_mappings(self, agent):
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return agent['configurations'].get('device_mappings', {})
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def get_standard_device_mappings(self, agent):
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"""Return the agent's device mappings in a standard way.
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The common format for OVS and SRIOv mechanism drivers:
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{'physnet_name': ['device_or_bridge_1', 'device_or_bridge_2']}
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:param agent: The agent
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:returns A dict in the format: {'physnet_name': ['bridge_or_device']}
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:raises ValueError: if there is no device_mappings key in
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agent['configurations']
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"""
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if 'device_mappings' in agent['configurations']:
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return agent['configurations']['device_mappings']
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else:
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raise ValueError(_('Cannot standardize device mappings of agent '
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'type: %s'), agent['agent_type'])
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def bind_port(self, context):
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LOG.debug("Attempting to bind port %(port)s on "
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"network %(network)s",
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{'port': context.current['id'],
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'network': context.network.current['id']})
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profile = context.current.get(portbindings.PROFILE)
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vnic_type = context.current.get(portbindings.VNIC_TYPE,
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portbindings.VNIC_NORMAL)
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capabilities = []
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if profile:
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capabilities = profile.get('capabilities', [])
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if (vnic_type == portbindings.VNIC_DIRECT and
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'switchdev' in capabilities):
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LOG.debug("Refusing to bind due to unsupported vnic_type: %s "
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"with switchdev capability", portbindings.VNIC_DIRECT)
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return
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if vnic_type not in self.supported_vnic_types:
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LOG.debug("Refusing to bind due to unsupported vnic_type: %s",
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vnic_type)
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return
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if vnic_type == portbindings.VNIC_DIRECT_PHYSICAL:
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# Physical functions don't support things like QoS properties,
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# spoof checking, etc. so we might as well side-step the agent
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# for now. The agent also doesn't currently recognize non-VF
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# PCI devices so we won't get port status change updates
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# either. This should be changed in the future so physical
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# functions can use device mapping checks and the plugin can
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# get port status updates.
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for segment in context.segments_to_bind:
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if self.try_to_bind_segment_for_agent(context, segment,
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agent=None):
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break
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return
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for agent in context.host_agents(self.agent_type):
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LOG.debug("Checking agent: %s", agent)
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if agent['alive']:
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for segment in context.segments_to_bind:
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if self.try_to_bind_segment_for_agent(context, segment,
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agent):
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return
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else:
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LOG.warning("Attempting to bind with dead agent: %s", agent)
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def try_to_bind_segment_for_agent(self, context, segment, agent):
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vnic_type = context.current.get(portbindings.VNIC_TYPE,
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portbindings.VNIC_DIRECT)
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vif_type = self.vnic_type_for_vif_type.get(
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vnic_type, portbindings.VIF_TYPE_HW_VEB)
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if not self.check_segment_for_agent(segment, agent):
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return False
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port_status = (constants.PORT_STATUS_ACTIVE if agent is None
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else constants.PORT_STATUS_DOWN)
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context.set_binding(segment[api.ID],
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vif_type,
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self._get_vif_details(segment),
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port_status)
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LOG.debug("Bound using segment: %s", segment)
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return True
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def check_segment_for_agent(self, segment, agent=None):
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"""Check if segment can be bound.
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:param segment: segment dictionary describing segment to bind
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:param agent: agents_db entry describing agent to bind or None
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:returns: True if segment can be bound for agent
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"""
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network_type = segment[api.NETWORK_TYPE]
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if network_type in self.get_allowed_network_types(agent):
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if agent:
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mappings = self.get_mappings(agent)
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LOG.debug("Checking segment: %(segment)s "
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"for mappings: %(mappings)s ",
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{'segment': segment, 'mappings': mappings})
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return segment[api.PHYSICAL_NETWORK] in mappings
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return True
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return False
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def check_vlan_transparency(self, context):
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"""SR-IOV driver vlan transparency support."""
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return True
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def _get_vif_details(self, segment):
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network_type = segment[api.NETWORK_TYPE]
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if network_type == constants.TYPE_FLAT:
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vlan_id = FLAT_VLAN
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elif network_type == constants.TYPE_VLAN:
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vlan_id = segment[api.SEGMENTATION_ID]
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else:
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raise exc.SriovUnsupportedNetworkType(net_type=network_type)
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vif_details = self.vif_details.copy()
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vif_details[portbindings.VIF_DETAILS_VLAN] = str(vlan_id)
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return vif_details
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