LXR qemu/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
  22import iotests
  23from iotests import qemu_img_create, file_path, log, filter_qmp_event
  24
  25iotests.script_initialize(
  26    supported_fmts=['qcow2'],
  27    unsupported_imgopts=['compat']
  28)
  29
  30base, top = file_path('base', 'top')
  31size = 64 * 1024 * 3
  32
  33
  34def print_bitmap(msg, vm):
  35    result = vm.qmp('query-block')['return'][0]
  36    info = result.get("inserted", {})
  37    if 'dirty-bitmaps' in info:
  38        bitmap = info['dirty-bitmaps'][0]
  39        log('{}: name={} dirty-clusters={}'.format(msg, bitmap['name'],
  40            bitmap['count'] // 64 // 1024))
  41    else:
  42        log(msg + ': not found')
  43
  44
  45def test(persistent, restart):
  46    assert persistent or not restart
  47    log("\nTestcase {}persistent {} restart\n".format(
  48            '' if persistent else 'non-', 'with' if restart else 'without'))
  49
  50    qemu_img_create('-f', iotests.imgfmt, base, str(size))
  51
  52    vm = iotests.VM().add_drive(base)
  53    vm.launch()
  54
  55    vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
  56               persistent=persistent)
  57    vm.hmp_qemu_io('drive0', 'write 0 64K')
  58    print_bitmap('initial bitmap', vm)
  59
  60    vm.qmp_log('blockdev-snapshot-sync', device='drive0', snapshot_file=top,
  61               format=iotests.imgfmt, filters=[iotests.filter_qmp_testfiles])
  62    vm.hmp_qemu_io('drive0', 'write 64K 512')
  63    print_bitmap('check that no bitmaps are in snapshot', vm)
  64
  65    if restart:
  66        log("... Restart ...")
  67        vm.shutdown()
  68        vm = iotests.VM().add_drive(top)
  69        vm.launch()
  70
  71    vm.qmp_log('block-commit', device='drive0', top=top,
  72               filters=[iotests.filter_qmp_testfiles])
  73    ev = vm.events_wait((('BLOCK_JOB_READY', None),
  74                         ('BLOCK_JOB_COMPLETED', None)))
  75    log(filter_qmp_event(ev))
  76    if (ev['event'] == 'BLOCK_JOB_COMPLETED'):
  77        vm.shutdown()
  78        log(vm.get_log())
  79        exit()
  80
  81    vm.qmp_log('block-job-complete', device='drive0')
  82    ev = vm.event_wait('BLOCK_JOB_COMPLETED')
  83    log(filter_qmp_event(ev))
  84    print_bitmap('check bitmap after commit', vm)
  85
  86    vm.hmp_qemu_io('drive0', 'write 128K 64K')
  87    print_bitmap('check updated bitmap', vm)
  88
  89    vm.shutdown()
  90
  91
  92test(persistent=False, restart=False)
  93test(persistent=True, restart=False)
  94test(persistent=True, restart=True)
  95