tests/qemu-iotests/235

   1 #!/usr/bin/env python
   2 #
   3 # Simple mirror test
   4 #
   5 # Copyright (c) 2018 Virtuozzo International GmbH. All rights reserved.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 import sys
  22 import os
  23 import iotests
  24 from iotests import qemu_img_create, qemu_io, file_path, log
  25
  26 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
  27
  28 from qemu.machine import QEMUMachine
  29
  30 # Note:
  31 # This test was added to check that mirror dead-lock was fixed (see previous
  32 # commit before this test addition).
  33 # And it didn't reproduce if at least one of the following:
  34 # 1. use small image size
  35 # 2. use raw format (not qcow2)
  36 # 3. drop kvm and use iotests.VM() (maybe, because of qtest) (however, it still
  37 #    reproduces, if just drop kvm, but gdb failed to produce full backtraces
  38 #    for me)
  39 # 4. add iothread
  40
  41 size = 1 * 1024 * 1024 * 1024
  42
  43 iotests.verify_image_format(supported_fmts=['qcow2'])
  44
  45 disk = file_path('disk')
  46
  47 # prepare source image
  48 qemu_img_create('-f', iotests.imgfmt, '-o', 'preallocation=metadata', disk,
  49                 str(size))
  50
  51 vm = QEMUMachine(iotests.qemu_prog)
  52 vm.add_args('-machine', 'accel=kvm:tcg')
  53 if iotests.qemu_default_machine == 's390-ccw-virtio':
  54         vm.add_args('-no-shutdown')
  55 vm.add_args('-drive', 'id=src,file=' + disk)
  56 vm.launch()
  57
  58 log(vm.qmp('object-add', qom_type='throttle-group', id='tg0',
  59            props={ 'x-bps-total': size }))
  60
  61 log(vm.qmp('blockdev-add',
  62            **{ 'node-name': 'target',
  63                'driver': 'throttle',
  64                'throttle-group': 'tg0',
  65                'file': {
  66                    'driver': 'null-co',
  67                    'size': size
  68                 } }))
  69
  70 log(vm.qmp('blockdev-mirror', device='src', target='target', sync='full'))
  71
  72 try:
  73     vm.event_wait('BLOCK_JOB_READY', timeout=10.0)
  74 except:
  75     vm.shutdown()
  76     raise
  77
  78 vm.shutdown()