192 lines
8.0 KiB
Python
192 lines
8.0 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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from oslo_config import cfg
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from oslo_log import log
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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 _LE, _LW
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from neutron.plugins.common import constants as p_const
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from neutron.plugins.ml2 import driver_api as api
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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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LOG = log.getLogger(__name__)
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FLAT_VLAN = 0
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sriov_opts = [
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cfg.ListOpt('supported_pci_vendor_devs',
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default=['15b3:1004', '8086:10ca'],
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help=_("Supported PCI vendor devices, defined by "
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"vendor_id:product_id according to the PCI ID "
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"Repository. Default enables support for Intel "
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"and Mellanox SR-IOV capable NICs")),
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cfg.BoolOpt('agent_required',
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default=False,
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help=_("SRIOV neutron agent is required for port binding")),
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]
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cfg.CONF.register_opts(sriov_opts, "ml2_sriov")
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class SriovNicSwitchMechanismDriver(api.MechanismDriver):
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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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If vendor NIC does not support updates, setting agent_required = False
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will allow to use Mechanism Driver without L2 agent.
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"""
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def __init__(self,
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agent_type=constants.AGENT_TYPE_NIC_SWITCH,
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vif_type=portbindings.VIF_TYPE_HW_VEB,
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vif_details={portbindings.CAP_PORT_FILTER: False},
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supported_vnic_types=[portbindings.VNIC_DIRECT,
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portbindings.VNIC_MACVTAP],
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supported_pci_vendor_info=None):
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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_type: Value for binding:vif_type when bound
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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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:param supported_pci_vendor_info: The pci_vendor_info values to bind
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"""
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self.agent_type = agent_type
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self.supported_vnic_types = supported_vnic_types
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self.vif_type = vif_type
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self.vif_details = vif_details
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self.supported_network_types = (p_const.TYPE_VLAN, p_const.TYPE_FLAT)
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def initialize(self):
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try:
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self.pci_vendor_info = cfg.CONF.ml2_sriov.supported_pci_vendor_devs
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self._check_pci_vendor_config(self.pci_vendor_info)
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self.agent_required = cfg.CONF.ml2_sriov.agent_required
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except ValueError:
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LOG.exception(_LE("Failed to parse supported PCI vendor devices"))
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raise cfg.Error(_("Parsing supported pci_vendor_devs failed"))
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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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vnic_type = context.current.get(portbindings.VNIC_TYPE,
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portbindings.VNIC_NORMAL)
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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 not self._check_supported_pci_vendor_device(context):
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LOG.debug("Refusing to bind due to unsupported pci_vendor device")
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return
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if self.agent_required:
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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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if self.try_to_bind(context, agent):
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return
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else:
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LOG.warning(_LW("Attempting to bind with dead agent: %s"),
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agent)
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else:
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self.try_to_bind(context)
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def try_to_bind(self, context, agent=None):
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for segment in context.segments_to_bind:
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if self.check_segment(segment, agent):
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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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self.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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return False
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def check_segment(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.supported_network_types:
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if agent:
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mappings = agent['configurations'].get('device_mappings', {})
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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_supported_pci_vendor_device(self, context):
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if self.pci_vendor_info:
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profile = context.current.get(portbindings.PROFILE, {})
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if not profile:
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LOG.debug("Missing profile in port binding")
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return False
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pci_vendor_info = profile.get('pci_vendor_info')
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if not pci_vendor_info:
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LOG.debug("Missing pci vendor info in profile")
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return False
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if pci_vendor_info not in self.pci_vendor_info:
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LOG.debug("Unsupported pci_vendor %s", pci_vendor_info)
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return False
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return True
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return False
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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 == p_const.TYPE_FLAT:
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vlan_id = FLAT_VLAN
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elif network_type == p_const.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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@staticmethod
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def _check_pci_vendor_config(pci_vendor_list):
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for pci_vendor_info in pci_vendor_list:
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try:
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vendor_id, product_id = [
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item.strip() for item in pci_vendor_info.split(':')
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if item.strip()]
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except ValueError:
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raise ValueError(_('Incorrect pci_vendor_info: "%s", should be'
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' pair vendor_id:product_id') %
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pci_vendor_info)
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