iotests: test external snapshot with bitmap copying

This test shows that external snapshots and incremental backups are
friends.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20190517152111.206494-3-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2019-05-28 19:33:31 -04:00 committed by John Snow
parent eff0829b07
commit 403bb8185e
3 changed files with 105 additions and 0 deletions

52
tests/qemu-iotests/254 Executable file
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#!/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()

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{"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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249 rw auto quick 249 rw auto quick
252 rw auto backing quick 252 rw auto backing quick
253 rw auto quick 253 rw auto quick
254 rw auto backing quick