xref: /qemu/tests/qemu-iotests/202 (revision 27a4a30e) 
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 'transaction' blockdev-snapshot-sync with multiple drives on a
21# single IOThread completes successfully.  This particular command triggered a
22# hang due to recursive AioContext locking and BDRV_POLL_WHILE().  Protect
23# against regressions.
24
25import iotests
26
27iotests.verify_image_format(supported_fmts=['qcow2'])
28iotests.verify_platform(['linux'])
29
30with iotests.FilePath('disk0.img') as disk0_img_path, \
31     iotests.FilePath('disk1.img') as disk1_img_path, \
32     iotests.FilePath('disk0-snap.img') as disk0_snap_img_path, \
33     iotests.FilePath('disk1-snap.img') as disk1_snap_img_path, \
34     iotests.VM() as vm:
35
36    img_size = '10M'
37    iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk0_img_path, img_size)
38    iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk1_img_path, img_size)
39
40    iotests.log('Launching VM...')
41    vm.launch()
42
43    iotests.log('Adding IOThread...')
44    iotests.log(vm.qmp('object-add',
45                       qom_type='iothread',
46                       id='iothread0'))
47
48    iotests.log('Adding blockdevs...')
49    iotests.log(vm.qmp('blockdev-add',
50                       driver=iotests.imgfmt,
51                       node_name='disk0',
52                       file={
53                           'driver': 'file',
54                           'filename': disk0_img_path,
55                       }))
56    iotests.log(vm.qmp('blockdev-add',
57                       driver=iotests.imgfmt,
58                       node_name='disk1',
59                       file={
60                           'driver': 'file',
61                           'filename': disk1_img_path,
62                       }))
63
64    iotests.log('Setting iothread...')
65    iotests.log(vm.qmp('x-blockdev-set-iothread',
66                       node_name='disk0',
67                       iothread='iothread0'))
68    iotests.log(vm.qmp('x-blockdev-set-iothread',
69                       node_name='disk1',
70                       iothread='iothread0'))
71
72    iotests.log('Creating external snapshots...')
73    iotests.log(vm.qmp(
74                  'transaction',
75                  actions=[
76                      {
77                          'data': {
78                              'node-name': 'disk0',
79                              'snapshot-file': disk0_snap_img_path,
80                              'snapshot-node-name': 'disk0-snap',
81                              'mode': 'absolute-paths',
82                              'format': iotests.imgfmt,
83                          },
84                          'type': 'blockdev-snapshot-sync'
85                      }, {
86                          'data': {
87                              'node-name': 'disk1',
88                              'snapshot-file': disk1_snap_img_path,
89                              'snapshot-node-name': 'disk1-snap',
90                              'mode': 'absolute-paths',
91                              'format': iotests.imgfmt
92                          },
93                          'type': 'blockdev-snapshot-sync'
94                      }
95                  ]))
96