tests/qemu-iotests/235

   1 #!/usr/bin/env python3
   2 # group: quick
   3 #
   4 # Simple mirror test
   5 #
   6 # Copyright (c) 2018 Virtuozzo International GmbH. All rights reserved.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 import sys
  23 import os
  24 import iotests
  25 from iotests import qemu_img_create, qemu_io, file_path, log
  26
  27 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
  28
  29 from qemu.machine import QEMUMachine
  30
  31 iotests.script_initialize(supported_fmts=['qcow2'])
  32
  33 # Note:
  34 # This test was added to check that mirror dead-lock was fixed (see previous
  35 # commit before this test addition).
  36 # And it didn't reproduce if at least one of the following:
  37 # 1. use small image size
  38 # 2. use raw format (not qcow2)
  39 # 3. drop kvm and use iotests.VM() (maybe, because of qtest) (however, it still
  40 #    reproduces, if just drop kvm, but gdb failed to produce full backtraces
  41 #    for me)
  42 # 4. add iothread
  43
  44 size = 1 * 1024 * 1024 * 1024
  45
  46 disk = file_path('disk')
  47
  48 # prepare source image
  49 qemu_img_create('-f', iotests.imgfmt, '-o', 'preallocation=metadata', disk,
  50                 str(size))
  51
  52 vm = QEMUMachine(iotests.qemu_prog)
  53 vm.add_args('-accel', 'kvm', '-accel', 'tcg')
  54 if iotests.qemu_default_machine == 's390-ccw-virtio':
  55         vm.add_args('-no-shutdown')
  56 vm.add_args('-drive', 'id=src,file=' + disk)
  57 vm.launch()
  58
  59 log(vm.qmp('object-add', qom_type='throttle-group', id='tg0',
  60            limits={'bps-total': size}))
  61
  62 log(vm.qmp('blockdev-add',
  63            **{ 'node-name': 'target',
  64                'driver': 'throttle',
  65                'throttle-group': 'tg0',
  66                'file': {
  67                    'driver': 'null-co',
  68                    'size': size
  69                 } }))
  70
  71 log(vm.qmp('blockdev-mirror', device='src', target='target', sync='full'))
  72
  73 try:
  74     vm.event_wait('BLOCK_JOB_READY', timeout=10.0)
  75 except:
  76     vm.shutdown()
  77     raise
  78
  79 vm.shutdown()