1 # Copyright 2016 Intel Corporation.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 """Automation of QEMU hypervisor for launching virtio-net enabled guests.
19 from vnfs.qemu.qemu import IVnfQemu
20 from conf import settings as S
21 from tools import tasks
23 class QemuVirtioNet(IVnfQemu):
25 Control an instance of QEMU with virtio-net guest communication.
30 Initialisation function.
32 super(QemuVirtioNet, self).__init__()
33 self._logger = logging.getLogger(__name__)
35 # insert vanilla ovs specific modules
36 tasks.run_task(['sudo', 'modprobe', 'vhost_net'], self._logger,
37 'Loading vhost_net module...', True)
39 # calculate index of first interface, i.e. check how many
40 # interfaces has been created for previous VMs, where 1st NIC
41 # of 1st VM has index 0
42 start_index = sum(S.getValue('GUEST_NICS_NR')[:self._number])
45 if int(S.getValue('GUEST_NIC_QUEUES')[self._number]):
46 queue_str = ',queues={}'.format(
47 S.getValue('GUEST_NIC_QUEUES')[self._number])
48 mq_vector_str = ',mq=on,vectors={}'.format(
49 int(S.getValue('GUEST_NIC_QUEUES')[self._number]) * 2 + 2)
51 queue_str, mq_vector_str = '', ''
53 # setup requested number of interfaces
54 for nic in range(len(self._nics)):
55 index = start_index + nic
57 self._cmd += ['-netdev', 'type=tap,id=' +
58 self._nics[nic]['device'] + queue_str +
59 ',script=no,downscript=no,' +
60 'ifname=tap' + ifi + ',vhost=on',
62 'virtio-net-pci,mac=' +
63 self._nics[nic]['mac'] + ',netdev=' +
64 self._nics[nic]['device'] +
65 ',csum=off,gso=off,' +
66 'guest_tso4=off,guest_tso6=off,guest_ecn=off' +