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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# 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 logging
from vicn.core.address_mgr import AddressManager
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.exception import ResourceNotFound
from vicn.core.requirement import Requirement
from vicn.core.task import inline_task
from vicn.resource.channel import Channel
from vicn.resource.linux.bridge_mgr import BridgeManager
from vicn.resource.linux.net_device import BaseNetDevice
log = logging.getLogger(__name__)
# FIXME This should use the AddressManager to get allocated a name that does
# not exist
DEFAULT_BRIDGE_NAME = 'br0'
class Bridge(Channel, BaseNetDevice):
"""
Resource: Bridge
"""
node = Attribute(
reverse_name = 'bridge',
reverse_description = 'Main bridge',
reverse_auto = 'true',
multiplicity = Multiplicity.OneToOne,
requirements = [
Requirement('bridge_manager')
])
device_name = Attribute(
default = DEFAULT_BRIDGE_NAME,
mandatory = False)
#--------------------------------------------------------------------------
# Constructor / Accessors
#--------------------------------------------------------------------------
def __init__(self, *args, **kwargs):
super().__init__(self, *args, **kwargs)
self.prefix = 'br'
self.netdevice_type = 'bridge'
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
@inline_task
def __get__(self):
# FIXME we currently force the recreation of the bridge, delegating the
# check to the creation function
raise ResourceNotFound
def __create__(self):
# FIXME : reserves .1 IP address for the bridge, provided no other
# class uses this trick
AddressManager().get_ip(self)
return self.node.bridge_manager.add_bridge(self.device_name)
# Everything should be handled by BaseNetDevice
__delete__ = None
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
def _add_interface(self, interface, vlan=None):
"""
Returns:
Task
"""
return self.node.bridge_manager.add_interface(self.device_name,
interface.device_name, vlan)
def __method_add_interface__(self, interface, vlan=None):
return self._add_interface(interface, vlan)
def _remove_interface(self, interface):
"""
Returns:
Task
"""
log.info('Removing interface {} from bridge {}'.format(
interface.device_name, self.name))
return self.node.bridge_manager.del_interface(self.device_name,
interface.device_name)
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