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#!/usr/bin/env python
#
# Tests for dirty bitmaps postcopy migration.
#
# Copyright (c) 2016-2017 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 os
import iotests
import time
from iotests import qemu_img
disk_a = os.path.join(iotests.test_dir, 'disk_a')
disk_b = os.path.join(iotests.test_dir, 'disk_b')
size = '256G'
fifo = os.path.join(iotests.test_dir, 'mig_fifo')
class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase):
def tearDown(self):
self.vm_a.shutdown()
self.vm_b.shutdown()
os.remove(disk_a)
os.remove(disk_b)
os.remove(fifo)
def setUp(self):
os.mkfifo(fifo)
qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a)
self.vm_b = iotests.VM(path_suffix='b').add_drive(disk_b)
self.vm_b.add_incoming("exec: cat '" + fifo + "'")
self.vm_a.launch()
self.vm_b.launch()
def test_postcopy(self):
write_size = 0x40000000
granularity = 512
chunk = 4096
result = self.vm_a.qmp('block-dirty-bitmap-add', node='drive0',
name='bitmap', granularity=granularity)
self.assert_qmp(result, 'return', {});
s = 0
while s < write_size:
self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
s += 0x10000
s = 0x8000
while s < write_size:
self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
s += 0x10000
result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap')
sha256 = result['return']['sha256']
result = self.vm_a.qmp('block-dirty-bitmap-clear', node='drive0',
name='bitmap')
self.assert_qmp(result, 'return', {});
s = 0
while s < write_size:
self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
s += 0x10000
bitmaps_cap = {'capability': 'dirty-bitmaps', 'state': True}
events_cap = {'capability': 'events', 'state': True}
result = self.vm_a.qmp('migrate-set-capabilities',
capabilities=[bitmaps_cap, events_cap])
self.assert_qmp(result, 'return', {})
result = self.vm_b.qmp('migrate-set-capabilities',
capabilities=[bitmaps_cap])
self.assert_qmp(result, 'return', {})
result = self.vm_a.qmp('migrate', uri='exec:cat>' + fifo)
self.assert_qmp(result, 'return', {})
result = self.vm_a.qmp('migrate-start-postcopy')
self.assert_qmp(result, 'return', {})
while True:
event = self.vm_a.event_wait('MIGRATION')
if event['data']['status'] == 'completed':
break
s = 0x8000
while s < write_size:
self.vm_b.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
s += 0x10000
result = self.vm_b.qmp('query-block');
while len(result['return'][0]['dirty-bitmaps']) > 1:
time.sleep(2)
result = self.vm_b.qmp('query-block');
result = self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap')
self.assert_qmp(result, 'return/sha256', sha256);
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'], supported_cache_modes=['none'],
supported_protocols=['file'])
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