/usr/lib/python3/dist-packages/vif_plug_ovs/ovs.py is in python3-os-vif 1.2.1-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | # Derived from nova/virt/libvirt/vif.py
#
# Copyright (C) 2011 Midokura KK
# Copyright (C) 2011 Nicira, Inc
# Copyright 2011 OpenStack Foundation
# 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 os_vif import objects
from os_vif import plugin
from oslo_config import cfg
from vif_plug_ovs import constants
from vif_plug_ovs import exception
from vif_plug_ovs import linux_net
class OvsPlugin(plugin.PluginBase):
"""An OVS plugin that can setup VIFs in many ways
The OVS plugin supports several different VIF types, VIFBridge
and VIFOpenVSwitch, and will choose the appropriate plugging
action depending on the type of VIF config it receives.
If given a VIFBridge, then it will create connect the VM via
a regular Linux bridge device to allow security group rules to
be applied to VM traiffic.
"""
NIC_NAME_LEN = 14
CONFIG_OPTS = (
cfg.IntOpt('network_device_mtu',
default=1500,
help='MTU setting for network interface.',
deprecated_group="DEFAULT"),
cfg.IntOpt('ovs_vsctl_timeout',
default=120,
help='Amount of time, in seconds, that ovs_vsctl should '
'wait for a response from the database. 0 is to wait '
'forever.',
deprecated_group="DEFAULT"),
)
@staticmethod
def gen_port_name(prefix, id):
return ("%s%s" % (prefix, id))[:OvsPlugin.NIC_NAME_LEN]
@staticmethod
def get_veth_pair_names(vif):
return (OvsPlugin.gen_port_name("qvb", vif.id),
OvsPlugin.gen_port_name("qvo", vif.id))
def describe(self):
return objects.host_info.HostPluginInfo(
plugin_name="ovs",
vif_info=[
objects.host_info.HostVIFInfo(
vif_object_name=objects.vif.VIFBridge.__name__,
min_version="1.0",
max_version="1.0"),
objects.host_info.HostVIFInfo(
vif_object_name=objects.vif.VIFOpenVSwitch.__name__,
min_version="1.0",
max_version="1.0"),
objects.host_info.HostVIFInfo(
vif_object_name=objects.vif.VIFVHostUser.__name__,
min_version="1.0",
max_version="1.0")
])
def _plug_vhostuser(self, vif, instance_info):
linux_net.ensure_ovs_bridge(vif.network.bridge,
constants.OVS_DATAPATH_NETDEV)
linux_net.create_ovs_vif_port(
vif.network.bridge,
OvsPlugin.gen_port_name("vhu", vif.id),
vif.port_profile.interface_id,
vif.address, instance_info.uuid,
self.config.network_device_mtu,
timeout=self.config.ovs_vsctl_timeout,
interface_type=constants.OVS_VHOSTUSER_INTERFACE_TYPE)
def _plug_bridge(self, vif, instance_info):
"""Plug using hybrid strategy
Create a per-VIF linux bridge, then link that bridge to the OVS
integration bridge via a veth device, setting up the other end
of the veth device just like a normal OVS port. Then boot the
VIF on the linux bridge using standard libvirt mechanisms.
"""
v1_name, v2_name = self.get_veth_pair_names(vif)
linux_net.ensure_bridge(vif.bridge_name)
if not linux_net.device_exists(v2_name):
linux_net.create_veth_pair(v1_name, v2_name,
self.config.network_device_mtu)
linux_net.add_bridge_port(vif.bridge_name, v1_name)
linux_net.ensure_ovs_bridge(vif.network.bridge,
constants.OVS_DATAPATH_SYSTEM)
linux_net.create_ovs_vif_port(
vif.network.bridge,
v2_name,
vif.port_profile.interface_id,
vif.address, instance_info.uuid,
self.config.network_device_mtu,
timeout=self.config.ovs_vsctl_timeout)
def plug(self, vif, instance_info):
if not hasattr(vif, "port_profile"):
raise exception.MissingPortProfile()
if not isinstance(vif.port_profile,
objects.vif.VIFPortProfileOpenVSwitch):
raise exception.WrongPortProfile(
profile=vif.port_profile.__class__.__name__)
if isinstance(vif, objects.vif.VIFOpenVSwitch):
linux_net.ensure_ovs_bridge(vif.network.bridge,
constants.OVS_DATAPATH_SYSTEM)
elif isinstance(vif, objects.vif.VIFBridge):
self._plug_bridge(vif, instance_info)
elif isinstance(vif, objects.vif.VIFVHostUser):
self._plug_vhostuser(vif, instance_info)
def _unplug_vhostuser(self, vif, instance_info):
linux_net.delete_ovs_vif_port(vif.network.bridge,
OvsPlugin.gen_port_name("vhu", vif.id),
timeout=self.config.ovs_vsctl_timeout)
def _unplug_bridge(self, vif, instance_info):
"""UnPlug using hybrid strategy
Unhook port from OVS, unhook port from bridge, delete
bridge, and delete both veth devices.
"""
v1_name, v2_name = self.get_veth_pair_names(vif)
linux_net.delete_bridge(vif.bridge_name, v1_name)
linux_net.delete_ovs_vif_port(vif.network.bridge, v2_name,
timeout=self.config.ovs_vsctl_timeout)
def unplug(self, vif, instance_info):
if not hasattr(vif, "port_profile"):
raise exception.MissingPortProfile()
if not isinstance(vif.port_profile,
objects.vif.VIFPortProfileOpenVSwitch):
raise exception.WrongPortProfile(
profile=vif.port_profile.__class__.__name__)
if isinstance(vif, objects.vif.VIFOpenVSwitch):
pass # no special unplugging required
elif isinstance(vif, objects.vif.VIFBridge):
self._unplug_bridge(vif, instance_info)
elif isinstance(vif, objects.vif.VIFVHostUser):
self._unplug_vhostuser(vif, instance_info)
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