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# Copyright (c) 2016 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.
import collections
import os
from oslo_log import log
import six
from neutron.common import constants as n_const
from neutron.extensions import portbindings
from neutron.plugins.common import constants
from neutron.plugins.ml2 import driver_api
from networking_odl.ml2 import network_topology
LOG = log.getLogger(__name__)
HC_VPP_CAPABILITY = 'urn:opendaylight:params:xml:ns:yang:v3po'
class VppNetworkTopologyParser(network_topology.NetworkTopologyParser):
def new_element(self, devname):
return VppNetworkTopologyElement(devname=devname)
def parse_network_topology(self, network_topologies):
LOG.debug("Parsing Topology using VPP Topology Parser")
elements_by_name = collections.OrderedDict()
for topology in network_topologies['network-topology']['topology']:
if topology['topology-id'].startswith('topology-netconf'):
for node in topology['node']:
# expected :
# "node-id": "name",
# "netconf-node-topology:host": "172.21.174.41"
# "netconf-node-topology:available-capabilities"
# ^^
# container available-capabilities {
# config false;
# leaf capability {
# type string;
# }
# leaf capability-origin {
# type enumeration {
# enum user-defined;
# enum device-advertised;
# }
# }
# }
# }
node_name = node['node-id']
LOG.debug("Examining capabilities for node: %s\n",
node_name)
try:
capabilities = node[
'netconf-node-topology:available-capabilities']
LOG.debug("Node's capabilities: %s\n",
capabilities)
for item in capabilities['available-capability']:
if HC_VPP_CAPABILITY in item['capability']:
LOG.debug("Found VPP matching capability for "
"node: %s\n", node_name)
element = elements_by_name.get(node_name)
if element is None:
elements_by_name[node_name] = element = \
self.new_element(node_name)
self._update_elmnt_from_json_netconf_topo_node(
node, element, node_name)
except KeyError:
LOG.debug("No netconf available capabilities found for"
": %s\n", node_name)
# Can there can be more VPP instances connected beside the same IP
# address?
# Cache will yield more instaces for the same key
for __, element in six.iteritems(elements_by_name):
yield element
def _update_elmnt_from_json_netconf_topo_node(
self, node, element, node_name):
# fetch remote IP address
element.remote_ip = node["netconf-node-topology:host"]
# Assume Honeycomb-VPP supports vhost_user
element.support_vhost_user = True
LOG.debug(
'Topology element updated:\n'
' - VPP node name: %(node_name)r\n'
' - remote_ip: %(remote_ip)r\n'
' - support_vhost_user: %(support_vhost_user)r',
{'node_name': node_name,
'remote_ip': element.remote_ip,
'support_vhost_user': element.support_vhost_user})
class VppNetworkTopologyElement(network_topology.NetworkTopologyElement):
devname = None # Filled in by parser
remote_ip = None # Filled in by parser
has_datapath_type_netdev = False # Placeholder for future capability
support_vhost_user = False # VPP supports it by default actually.
# location for vhostuser sockets.
# TODO(wdec): This should be configurable in the ML2 config.
vhostuser_socket_dir = '/tmp/'
# TODO(wdec): And also this should be configurable in ML2...
# prefix for port
port_prefix = 'socket_'
def __init__(self, **kwargs):
for name, value in six.iteritems(kwargs):
setattr(self, name, value)
@property
def host_addresses(self):
# For now it support only the remote IP found in connection info
return self.remote_ip,
@property
def valid_vif_types(self):
return [portbindings.VIF_TYPE_VHOST_USER]
def bind_port(self, port_context, vif_type, vif_details):
port_context_id = port_context.current['id']
network_context_id = port_context.network.current['id']
# Bind port to the first valid segment
for segment in port_context.segments_to_bind:
if self._is_valid_segment(segment):
# Guest best VIF type for given host
vif_details = self._get_vif_details(
vif_details=vif_details, port_context_id=port_context_id,
vif_type=vif_type)
LOG.debug(
'Bind port with valid segment:\n'
'\tport: %(port)r\n'
'\tnetwork: %(network)r\n'
'\tsegment: %(segment)r\n'
'\tVIF type: %(vif_type)r\n'
'\tVIF details: %(vif_details)r',
{'port': port_context_id,
'network': network_context_id,
'segment': segment, 'vif_type': vif_type,
'vif_details': vif_details})
port_context.set_binding(
segment[driver_api.ID], vif_type, vif_details,
status=n_const.PORT_STATUS_ACTIVE)
return
raise ValueError('Unable to find any valid segment in given context.')
def to_dict(self):
data = super(VppNetworkTopologyElement, self).to_dict()
data.update(
{'uuid': self.devname,
'has_datapath_type_netdev': self.has_datapath_type_netdev,
'support_vhost_user': self.support_vhost_user,
'valid_vif_types': self.valid_vif_types})
if portbindings.VIF_TYPE_VHOST_USER in self.valid_vif_types:
data.update({'port_prefix': self.port_prefix,
'vhostuser_socket_dir': self.vhostuser_socket_dir})
return data
def _is_valid_segment(self, segment):
"""Verify a segment is valid for the OpenDaylight MechanismDriver.
Verify the requested segment is supported by ODL and return True or
False to indicate this to callers.
"""
network_type = segment[driver_api.NETWORK_TYPE]
return network_type in [constants.TYPE_LOCAL, constants.TYPE_GRE,
constants.TYPE_VXLAN, constants.TYPE_VLAN,
constants.TYPE_FLAT]
def _get_vif_details(self, vif_details, port_context_id, vif_type):
vif_details = dict(vif_details)
if vif_type == portbindings.VIF_TYPE_VHOST_USER:
socket_path = os.path.join(
self.vhostuser_socket_dir,
(self.port_prefix + port_context_id))
vif_details.update({
portbindings.VHOST_USER_MODE:
portbindings.VHOST_USER_MODE_SERVER,
portbindings.VHOST_USER_SOCKET: socket_path
})
return vif_details
def __setattr__(self, name, value):
# raises Attribute error if the class hasn't this attribute
getattr(type(self), name)
super(VppNetworkTopologyElement, self).__setattr__(name, value)
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