tests/qemu-iotests/260

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