tests/qemu-iotests/260

   1 #!/usr/bin/env python3
   2 #
   3 # Tests for temporary external snapshot when we have bitmaps.
   4 #
   5 # Copyright (c) 2019 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 iotests
  22 from iotests import qemu_img_create, file_path, log, filter_qmp_event
  23
  24 iotests.script_initialize(
  25     supported_fmts=['qcow2']
  26 )
  27
  28 base, top = file_path('base', 'top')
  29 size = 64 * 1024 * 3
  30
  31
  32 def print_bitmap(msg, vm):
  33     result = vm.qmp('query-block')['return'][0]
  34     if 'dirty-bitmaps' in result:
  35         bitmap = result['dirty-bitmaps'][0]
  36         log('{}: name={} dirty-clusters={}'.format(msg, bitmap['name'],
  37             bitmap['count'] // 64 // 1024))
  38     else:
  39         log(msg + ': not found')
  40
  41
  42 def test(persistent, restart):
  43     assert persistent or not restart
  44     log("\nTestcase {}persistent {} restart\n".format(
  45             '' if persistent else 'non-', 'with' if restart else 'without'))
  46
  47     qemu_img_create('-f', iotests.imgfmt, base, str(size))
  48
  49     vm = iotests.VM().add_drive(base)
  50     vm.launch()
  51
  52     vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
  53                persistent=persistent)
  54     vm.hmp_qemu_io('drive0', 'write 0 64K')
  55     print_bitmap('initial bitmap', vm)
  56
  57     vm.qmp_log('blockdev-snapshot-sync', device='drive0', snapshot_file=top,
  58                format=iotests.imgfmt, filters=[iotests.filter_qmp_testfiles])
  59     vm.hmp_qemu_io('drive0', 'write 64K 512')
  60     print_bitmap('check that no bitmaps are in snapshot', vm)
  61
  62     if restart:
  63         log("... Restart ...")
  64         vm.shutdown()
  65         vm = iotests.VM().add_drive(top)
  66         vm.launch()
  67
  68     vm.qmp_log('block-commit', device='drive0', top=top,
  69                filters=[iotests.filter_qmp_testfiles])
  70     ev = vm.events_wait((('BLOCK_JOB_READY', None),
  71                          ('BLOCK_JOB_COMPLETED', None)))
  72     log(filter_qmp_event(ev))
  73     if (ev['event'] == 'BLOCK_JOB_COMPLETED'):
  74         vm.shutdown()
  75         log(vm.get_log())
  76         exit()
  77
  78     vm.qmp_log('block-job-complete', device='drive0')
  79     ev = vm.event_wait('BLOCK_JOB_COMPLETED')
  80     log(filter_qmp_event(ev))
  81     print_bitmap('check bitmap after commit', vm)
  82
  83     vm.hmp_qemu_io('drive0', 'write 128K 64K')
  84     print_bitmap('check updated bitmap', vm)
  85
  86     vm.shutdown()
  87
  88
  89 test(persistent=False, restart=False)
  90 test(persistent=True, restart=False)
  91 test(persistent=True, restart=True)