qemu/tests/qemu-iotests/254

#!/usr/bin/env python
#
# Test external snapshot with bitmap copying and moving.
#
# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

import iotests
from iotests import qemu_img_create, file_path, log

iotests.verify_image_format(supported_fmts=['qcow2'])

disk, top = file_path('disk', 'top')
size = 1024 * 1024

qemu_img_create('-f', iotests.imgfmt, disk, str(size))

vm = iotests.VM().add_drive(disk, opts='node-name=base')
vm.launch()

vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0')
vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap1',
           persistent=True)
vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap2',
           persistent=True)

vm.hmp_qemu_io('drive0', 'write 0 512K')

vm.qmp_log('transaction', indent=2, actions=[
    {'type': 'blockdev-snapshot-sync',
     'data': {'device': 'drive0', 'snapshot-file': top,
              'snapshot-node-name': 'snap'}},

    # copy non-persistent bitmap0
    {'type': 'block-dirty-bitmap-add',
     'data': {'node': 'snap', 'name': 'bitmap0'}},
    {'type': 'block-dirty-bitmap-merge',
     'data': {'node': 'snap', 'target': 'bitmap0',
              'bitmaps': [{'node': 'base', 'name': 'bitmap0'}]}},

    # copy persistent bitmap1, original will be saved to base image
    {'type': 'block-dirty-bitmap-add',
     'data': {'node': 'snap', 'name': 'bitmap1', 'persistent': True}},
    {'type': 'block-dirty-bitmap-merge',
     'data': {'node': 'snap', 'target': 'bitmap1',
              'bitmaps': [{'node': 'base', 'name': 'bitmap1'}]}},

    # move persistent bitmap2, original will be removed and not saved
    # to base image
    {'type': 'block-dirty-bitmap-add',
     'data': {'node': 'snap', 'name': 'bitmap2', 'persistent': True}},
    {'type': 'block-dirty-bitmap-merge',
     'data': {'node': 'snap', 'target': 'bitmap2',
              'bitmaps': [{'node': 'base', 'name': 'bitmap2'}]}},
    {'type': 'block-dirty-bitmap-remove',
     'data': {'node': 'base', 'name': 'bitmap2'}}
], filters=[iotests.filter_qmp_testfiles])

result = vm.qmp('query-block')['return'][0]
log("query-block: device = {}, node-name = {}, dirty-bitmaps:".format(
    result['device'], result['inserted']['node-name']))
log(result['dirty-bitmaps'], indent=2)
log("\nbitmaps in backing image:")
log(result['inserted']['image']['backing-image']['format-specific'] \
    ['data']['bitmaps'], indent=2)

vm.shutdown()