iotests: test external snapshot with bitmap copying

#!/usr/bin/env python

#

# Test external snapshot with bitmap copying.

#

# 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

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.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'}},

    {'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'}]}}

], 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)

vm.shutdown()

{"execute": "block-dirty-bitmap-add", "arguments": {"name": "bitmap0", "node": "drive0"}}

{"return": {}}

{

  "execute": "transaction",

  "arguments": {

    "actions": [

      {

        "data": {

          "device": "drive0",

          "snapshot-file": "TEST_DIR/PID-top",

          "snapshot-node-name": "snap"

        },

        "type": "blockdev-snapshot-sync"

      },

      {

        "data": {

          "name": "bitmap0",

          "node": "snap"

        },

        "type": "block-dirty-bitmap-add"

      },

      {

        "data": {

          "bitmaps": [

            {

              "name": "bitmap0",

              "node": "base"

            }

          ],

          "node": "snap",

          "target": "bitmap0"

        },

        "type": "block-dirty-bitmap-merge"

      }

    ]

  }

}

{

  "return": {}

}

query-block: device = drive0, node-name = snap, dirty-bitmaps:

[

  {

    "busy": false,

    "count": 524288,

    "granularity": 65536,

    "name": "bitmap0",

    "persistent": false,

    "recording": true,

    "status": "active"

  }

]

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