tests/qemu-iotests/202

   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
  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.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                   ]))