vnfs/qemu/qemu_dpdk_vhost_user.py

   1 # Copyright 2015 Intel Corporation.
   2 #
   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
   6 #
   7 #   http://www.apache.org/licenses/LICENSE-2.0
   8 #
   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.
  14
  15 """Automation of QEMU hypervisor for launching vhost-user enabled guests.
  16 """
  17
  18 import logging
  19
  20 from conf import settings as S
  21 from vnfs.qemu.qemu import IVnfQemu
  22
  23 class QemuDpdkVhostUser(IVnfQemu):
  24     """
  25     Control an instance of QEMU with vHost user guest communication.
  26     """
  27     def __init__(self):
  28         """
  29         Initialisation function.
  30         """
  31         super(QemuDpdkVhostUser, self).__init__()
  32         self._logger = logging.getLogger(__name__)
  33
  34         # calculate indexes of guest devices (e.g. charx, dpdkvhostuserx)
  35         i = self._number * 2
  36         if1 = str(i)
  37         if2 = str(i + 1)
  38         net1 = 'net' + str(i + 1)
  39         net2 = 'net' + str(i + 2)
  40
  41         self._cmd += ['-chardev',
  42                       'socket,id=char' + if1 +
  43                       ',path=' + S.getValue('OVS_VAR_DIR') +
  44                       'dpdkvhostuser' + if1,
  45                       '-chardev',
  46                       'socket,id=char' + if2 +
  47                       ',path=' + S.getValue('OVS_VAR_DIR') +
  48                       'dpdkvhostuser' + if2,
  49                       '-netdev',
  50                       'type=vhost-user,id=' + net1 +
  51                       ',chardev=char' + if1 + ',vhostforce',
  52                       '-device',
  53                       'virtio-net-pci,mac=' +
  54                       S.getValue('GUEST_NET1_MAC')[self._number] +
  55                       ',netdev=' + net1 + ',csum=off,gso=off,' +
  56                       'guest_tso4=off,guest_tso6=off,guest_ecn=off',
  57                       '-netdev',
  58                       'type=vhost-user,id=' + net2 +
  59                       ',chardev=char' + if2 + ',vhostforce',
  60                       '-device',
  61                       'virtio-net-pci,mac=' +
  62                       S.getValue('GUEST_NET2_MAC')[self._number] +
  63                       ',netdev=' + net2 + ',csum=off,gso=off,' +
  64                       'guest_tso4=off,guest_tso6=off,guest_ecn=off',
  65                      ]
  66