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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.
#
from netmodel.model.key import Key
from netmodel.model.type import String, Bool
from vicn.core.attribute import Attribute, Reference
from vicn.core.task import BashTask, inline_task, get_attributes_task
from vicn.resource.linux.net_device import NetDevice, NetDeviceName
from vicn.resource.node import Node
from vicn.resource.symmetric_channel import SymmetricChannel
CMD_CREATE='''
# Create veth pair in the host node
ip link add name {self.device_name} type veth peer name {self.peer_device_name}
'''
DEPRECATED_CMD_UP='''
# The host interface will always be up...
ip link set dev {interface.host.device_name} up
# Move interface into container and rename it
ip link set dev {tmp_name} netns {pid} name {interface.device_name}
ip link set dev {interface.device_name} up
'''
# Forward declaration
class VethPair(SymmetricChannel):
pass
class VethNetDevice(NetDevice):
parent = Attribute(VethPair, mandatory = True, ro = True)
__get__ = None
__create__ = None
__delete__ = None
class VethPair(SymmetricChannel):
# Mimics NetDevice for using its __get__ and __delete__ functions
node = Attribute(Node)
device_name = Attribute(NetDeviceName)
peer_device_name = Attribute(NetDeviceName)
capacity = Attribute(String)
src = Attribute(ro = True, mandatory = False)
dst = Attribute(ro = True, mandatory = False)
auto_commit = Attribute(Bool, description = 'Auto commit interfaces')
__key1__ = Key(node, device_name)
__key2__ = Key(node, peer_device_name)
@inline_task
def _commit(self):
if self.auto_commit:
manager = self._state.manager
manager.commit_resource(self.src)
manager.commit_resource(self.dst)
def __initialize__(self):
# XXX owner prevents the resource to be committed
self.src = VethNetDevice(node = self.node,
parent = self,
device_name = self.device_name,
channel = self,
capacity = Reference(self, 'capacity'),
owner = self)
self.dst = VethNetDevice(node = self.node,
parent = self,
device_name = self.peer_device_name,
channel = self,
capacity = Reference(self, 'capacity'),
owner = self)
def __create__(self):
veth = BashTask(self.node, CMD_CREATE, {'self': self})
return (veth > super().__create__()) > self._commit()
def __get__(self):
return NetDevice.__get__(self) > self._commit()
def __delete__(self):
return NetDevice.__delete__(self)
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