xref: /qemu/tests/qemu-iotests/203 (revision ca61e750) 
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().
25
26import iotests
27
28iotests.script_initialize(supported_fmts=['qcow2'],
29                          supported_platforms=['linux'])
30
31with iotests.FilePath('disk0.img') as disk0_img_path, \
32     iotests.FilePath('disk1.img') as disk1_img_path, \
33     iotests.VM() as vm:
34
35    img_size = '10M'
36    iotests.qemu_img_create('-f', iotests.imgfmt, disk0_img_path, img_size)
37    iotests.qemu_img_create('-f', iotests.imgfmt, disk1_img_path, img_size)
38
39    iotests.log('Launching VM...')
40    (vm.add_object('iothread,id=iothread0')
41       .add_drive(disk0_img_path, 'node-name=drive0-node', interface='none')
42       .add_drive(disk1_img_path, 'node-name=drive1-node', interface='none')
43       .launch())
44
45    iotests.log('Setting IOThreads...')
46    iotests.log(vm.qmp('x-blockdev-set-iothread',
47                       node_name='drive0-node', iothread='iothread0',
48                       force=True))
49    iotests.log(vm.qmp('x-blockdev-set-iothread',
50                       node_name='drive1-node', iothread='iothread0',
51                       force=True))
52
53    iotests.log('Enabling migration QMP events...')
54    iotests.log(vm.qmp('migrate-set-capabilities', capabilities=[
55        {
56            'capability': 'events',
57            'state': True
58        }
59    ]))
60
61    iotests.log('Starting migration...')
62    iotests.log(vm.qmp('migrate', uri='exec:cat >/dev/null'))
63    while True:
64        event = vm.event_wait('MIGRATION')
65        iotests.log(event, filters=[iotests.filter_qmp_event])
66        if event['data']['status'] == 'completed':
67            break
68