iotests: test shutdown when bitmap is exported through NBD

#!/usr/bin/env python3

#

# Test shutdown when bitmap is exported through NBD server

#

# Copyright (c) 2020 Virtuozzo International GmbH.

#

# 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

# The test is unrelated to formats, restrict it to qcow2 to avoid extra runs

iotests.script_initialize(

    supported_fmts=['qcow2'],

)

nbd_sock = iotests.file_path('nbd.sock', base_dir=iotests.sock_dir)

nbd_uri = 'nbd+unix:///disk?socket=' + nbd_sock

size = 1024 * 1024

vm = iotests.VM()

vm.launch()

vm.qmp_log('blockdev-add', **{

    'node-name': 'disk',

    'driver': 'null-co',

    'size': 1024 * 1024,

})

vm.qmp_log('block-dirty-bitmap-add', **{

    'node': 'disk',

    'name': 'bitmap0'

})

vm.qmp_log('nbd-server-start', **{

    'addr': {

        'type': 'unix',

        'data': {'path': nbd_sock}

    }

}, filters=[iotests.filter_qmp_testfiles])

vm.qmp_log('nbd-server-add', **{

    'device': 'disk',

    'writable': True,

    'bitmap': 'bitmap0'

})

p = iotests.QemuIoInteractive('-f', 'raw', nbd_uri)

# wait for connection and check it:

iotests.log(p.cmd('read 0 512').rstrip(), filters=[iotests.filter_qemu_io])

vm.shutdown()

p.close()

{"execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "disk", "size": 1048576}}

{"return": {}}

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

{"return": {}}

{"execute": "nbd-server-start", "arguments": {"addr": {"data": {"path": "SOCK_DIR/PID-nbd.sock"}, "type": "unix"}}}

{"return": {}}

{"execute": "nbd-server-add", "arguments": {"bitmap": "bitmap0", "device": "disk", "writable": true}}

{"return": {}}

read 512/512 bytes at offset 0

512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

295 rw

296 rw

297 meta

299 auto quick

301 backing quick