tests/qemu-iotests/203

   1 #!/usr/bin/env python3
   2 # group: rw auto migration quick
   3 #
   4 # Copyright (C) 2017 Red Hat, Inc.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19 # Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
  20 #
  21 # Check that QMP 'migrate' with multiple drives on a single IOThread completes
  22 # successfully.  This particular command triggered a hang in the source QEMU
  23 # process due to recursive AioContext locking in bdrv_invalidate_all() and
  24 # BDRV_POLL_WHILE().  Protect against regressions even though the AioContext
  25 # lock no longer exists.
  26
  27 import iotests
  28
  29 iotests.script_initialize(supported_fmts=['qcow2'],
  30                           supported_platforms=['linux'])
  31
  32 with iotests.FilePath('disk0.img') as disk0_img_path, \
  33      iotests.FilePath('disk1.img') as disk1_img_path, \
  34      iotests.VM() as vm:
  35
  36     img_size = '10M'
  37     iotests.qemu_img_create('-f', iotests.imgfmt, disk0_img_path, img_size)
  38     iotests.qemu_img_create('-f', iotests.imgfmt, disk1_img_path, img_size)
  39
  40     iotests.log('Launching VM...')
  41     (vm.add_object('iothread,id=iothread0')
  42        .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none')
  43        .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none')
  44        .launch())
  45
  46     iotests.log('Setting IOThreads...')
  47     iotests.log(vm.qmp('x-blockdev-set-iothread',
  48                        node_name='drive0-node', iothread='iothread0',
  49                        force=True))
  50     iotests.log(vm.qmp('x-blockdev-set-iothread',
  51                        node_name='drive1-node', iothread='iothread0',
  52                        force=True))
  53
  54     iotests.log('Enabling migration QMP events...')
  55     iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[
  56         {
  57             'capability': 'events',
  58             'state': True
  59         }
  60     ]))
  61
  62     iotests.log('Starting migration...')
  63     iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null'))
  64     while True:
  65         event = vm.event_wait('MIGRATION')
  66         iotests.log(event, filters=[iotests.filter_qmp_event])
  67         if event['data']['status'] == 'completed':
  68             break