tests/qemu-iotests/203

   1 #!/usr/bin/env python3
   2 #
   3 # Copyright (C) 2017 Red Hat, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18 # Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
  19 #
  20 # Check that QMP 'migrate' with multiple drives on a single IOThread completes
  21 # successfully.  This particular command triggered a hang in the source QEMU
  22 # process due to recursive AioContext locking in bdrv_invalidate_all() and
  23 # BDRV_POLL_WHILE().
  24
  25 import iotests
  26
  27 iotests.script_initialize(supported_fmts=['qcow2'],
  28                           supported_platforms=['linux'])
  29
  30 with iotests.FilePath('disk0.img') as disk0_img_path, \
  31      iotests.FilePath('disk1.img') as disk1_img_path, \
  32      iotests.VM() as vm:
  33
  34     img_size = '10M'
  35     iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk0_img_path, img_size)
  36     iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk1_img_path, img_size)
  37
  38     iotests.log('Launching VM...')
  39     (vm.add_object('iothread,id=iothread0')
  40        .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none')
  41        .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none')
  42        .launch())
  43
  44     iotests.log('Setting IOThreads...')
  45     iotests.log(vm.qmp('x-blockdev-set-iothread',
  46                        node_name='drive0-node', iothread='iothread0',
  47                        force=True))
  48     iotests.log(vm.qmp('x-blockdev-set-iothread',
  49                        node_name='drive1-node', iothread='iothread0',
  50                        force=True))
  51
  52     iotests.log('Enabling migration QMP events...')
  53     iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[
  54         {
  55             'capability': 'events',
  56             'state': True
  57         }
  58     ]))
  59
  60     iotests.log('Starting migration...')
  61     iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null'))
  62     while True:
  63         event = vm.event_wait('MIGRATION')
  64         iotests.log(event, filters=[iotests.filter_qmp_event])
  65         if event['data']['status'] == 'completed':
  66             break