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# Copyright 2015 Intel Corporation.
#
# 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.
"""Automation of QEMU hypervisor for launching vhost-user enabled guests.
"""
import logging
from conf import settings as S
from vnfs.qemu.qemu_dpdk import IVnfQemuDpdk
class QemuDpdkVhostUser(IVnfQemuDpdk):
"""
Control an instance of QEMU with vHost user guest communication.
"""
def __init__(self):
"""
Initialisation function.
"""
super(QemuDpdkVhostUser, self).__init__()
self._logger = logging.getLogger(__name__)
# calculate indexes of guest devices (e.g. charx, dpdkvhostuserx)
i = self._number * 2
if1 = str(i)
if2 = str(i + 1)
net1 = 'net' + str(i + 1)
net2 = 'net' + str(i + 2)
self._cmd += ['-chardev',
'socket,id=char' + if1 +
',path=' + S.getValue('OVS_VAR_DIR') +
'dpdkvhostuser' + if1,
'-chardev',
'socket,id=char' + if2 +
',path=' + S.getValue('OVS_VAR_DIR') +
'dpdkvhostuser' + if2,
'-netdev',
'type=vhost-user,id=' + net1 +
',chardev=char' + if1 + ',vhostforce',
'-device',
'virtio-net-pci,mac=' +
S.getValue('GUEST_NET1_MAC')[self._number] +
',netdev=' + net1 + ',csum=off,gso=off,' +
'guest_tso4=off,guest_tso6=off,guest_ecn=off',
'-netdev',
'type=vhost-user,id=' + net2 +
',chardev=char' + if2 + ',vhostforce',
'-device',
'virtio-net-pci,mac=' +
S.getValue('GUEST_NET2_MAC')[self._number] +
',netdev=' + net2 + ',csum=off,gso=off,' +
'guest_tso4=off,guest_tso6=off,guest_ecn=off',
]
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