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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-cuse enabled guests.
"""
import logging
from conf import settings as S
from vnfs.qemu.qemu_dpdk import IVnfQemuDpdk
class QemuDpdkVhostCuse(IVnfQemuDpdk):
"""
Control an instance of QEMU with vHost cuse guest communication.
"""
def __init__(self):
"""
Initialisation function.
"""
super(QemuDpdkVhostCuse, 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 += ['-netdev',
'type=tap,id=' + net1 + ',script=no,downscript=no,' +
'ifname=dpdkvhostcuse' + if1 + ',vhost=on',
'-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=tap,id=' + net2 +
',script=no,downscript=no,' +
'ifname=dpdkvhostcuse' + if2 + ',vhost=on',
'-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',
]
# helper functions
def _modify_dpdk_makefile(self):
"""
Modifies DPDK makefile in Guest before compilation
"""
self.execute_and_wait("sed -i -e 's/CONFIG_RTE_LIBRTE_VHOST_USER=n/" +
"CONFIG_RTE_LIBRTE_VHOST_USER=y/g'" +
"config/common_linuxapp")
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