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# Copyright 2013 Cloudbase Solutions Srl

# Copyright 2013 Pedro Navarro Perez

# 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 abc

from oslo.config import cfg

from nova.openstack.common.gettextutils import _

from nova.openstack.common import log as logging

from nova.virt.hyperv import utilsfactory

hyperv_opts = [

cfg.StrOpt('vswitch_name',

help='External virtual switch Name, '

'if not provided, the first external virtual '

'switch is used'),

]

CONF = cfg.CONF

CONF.register_opts(hyperv_opts, 'hyperv')

LOG = logging.getLogger(__name__)

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class HyperVBaseVIFDriver(object):

@abc.abstractmethod

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    def plug(self, instance, vif):

        pass

    @abc.abstractmethod

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    def unplug(self, instance, vif):

        pass

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class HyperVNeutronVIFDriver(HyperVBaseVIFDriver):

"""Neutron VIF driver."""

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    def plug(self, instance, vif):

        # Neutron takes care of plugging the port

        pass

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    def unplug(self, instance, vif):

        # Neutron takes care of unplugging the port

        pass

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class HyperVNovaNetworkVIFDriver(HyperVBaseVIFDriver):

"""Nova network VIF driver."""

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    def __init__(self):

        self._vmutils = utilsfactory.get_vmutils()

        self._netutils = utilsfactory.get_networkutils()

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    def plug(self, instance, vif):

        vswitch_path = self._netutils.get_external_vswitch(

            CONF.hyperv.vswitch_name)

        vm_name = instance['name']

        LOG.debug(_('Creating vswitch port for instance: %s') % vm_name)

        if self._netutils.vswitch_port_needed():

            vswitch_data = self._netutils.create_vswitch_port(vswitch_path,

                                                              vm_name)

        else:

            vswitch_data = vswitch_path

        self._vmutils.set_nic_connection(vm_name, vif['id'], vswitch_data)

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    def unplug(self, instance, vif):

        #TODO(alepilotti) Not implemented

        pass