xref: /qemu/tests/qemu-iotests/260 (revision b355f08a) 
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)
28
29base, top = file_path('base', 'top')
30size = 64 * 1024 * 3
31
32
33def print_bitmap(msg, vm):
34    result = vm.qmp('query-block')['return'][0]
35    info = result.get("inserted", {})
36    if 'dirty-bitmaps' in info:
37        bitmap = info['dirty-bitmaps'][0]
38        log('{}: name={} dirty-clusters={}'.format(msg, bitmap['name'],
39            bitmap['count'] // 64 // 1024))
40    else:
41        log(msg + ': not found')
42
43
44def test(persistent, restart):
45    assert persistent or not restart
46    log("\nTestcase {}persistent {} restart\n".format(
47            '' if persistent else 'non-', 'with' if restart else 'without'))
48
49    qemu_img_create('-f', iotests.imgfmt, base, str(size))
50
51    vm = iotests.VM().add_drive(base)
52    vm.launch()
53
54    vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
55               persistent=persistent)
56    vm.hmp_qemu_io('drive0', 'write 0 64K')
57    print_bitmap('initial bitmap', vm)
58
59    vm.qmp_log('blockdev-snapshot-sync', device='drive0', snapshot_file=top,
60               format=iotests.imgfmt, filters=[iotests.filter_qmp_testfiles])
61    vm.hmp_qemu_io('drive0', 'write 64K 512')
62    print_bitmap('check that no bitmaps are in snapshot', vm)
63
64    if restart:
65        log("... Restart ...")
66        vm.shutdown()
67        vm = iotests.VM().add_drive(top)
68        vm.launch()
69
70    vm.qmp_log('block-commit', device='drive0', top=top,
71               filters=[iotests.filter_qmp_testfiles])
72    ev = vm.events_wait((('BLOCK_JOB_READY', None),
73                         ('BLOCK_JOB_COMPLETED', None)))
74    log(filter_qmp_event(ev))
75    if (ev['event'] == 'BLOCK_JOB_COMPLETED'):
76        vm.shutdown()
77        log(vm.get_log())
78        exit()
79
80    vm.qmp_log('block-job-complete', device='drive0')
81    ev = vm.event_wait('BLOCK_JOB_COMPLETED')
82    log(filter_qmp_event(ev))
83    print_bitmap('check bitmap after commit', vm)
84
85    vm.hmp_qemu_io('drive0', 'write 128K 64K')
86    print_bitmap('check updated bitmap', vm)
87
88    vm.shutdown()
89
90
91test(persistent=False, restart=False)
92test(persistent=True, restart=False)
93test(persistent=True, restart=True)
94