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#!/usr/bin/env python3
#
# Tests for dirty bitmaps 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
import itertools
import operator
import re
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 = '1M'
mig_file = os.path.join(iotests.test_dir, 'mig_file')
mig_cmd = 'exec: cat > ' + mig_file
incoming_cmd = 'exec: cat ' + mig_file
class TestDirtyBitmapMigration(iotests.QMPTestCase):
def tearDown(self):
self.vm_a.shutdown()
self.vm_b.shutdown()
os.remove(disk_a)
os.remove(disk_b)
os.remove(mig_file)
def setUp(self):
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_a.launch()
self.vm_b = iotests.VM(path_suffix='b')
def add_bitmap(self, vm, granularity, persistent):
params = {'node': 'drive0',
'name': 'bitmap0',
'granularity': granularity}
if persistent:
params['persistent'] = True
result = vm.qmp('block-dirty-bitmap-add', **params)
self.assert_qmp(result, 'return', {});
def get_bitmap_hash(self, vm):
result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap0')
return result['return']['sha256']
def check_bitmap(self, vm, sha256):
result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap0')
if sha256:
self.assert_qmp(result, 'return/sha256', sha256);
else:
self.assert_qmp(result, 'error/desc',
"Dirty bitmap 'bitmap0' not found");
def do_test_migration_resume_source(self, persistent, migrate_bitmaps):
granularity = 512
# regions = ((start, count), ...)
regions = ((0, 0x10000),
(0xf0000, 0x10000),
(0xa0201, 0x1000))
mig_caps = [{'capability': 'events', 'state': True}]
if migrate_bitmaps:
mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
result = self.vm_a.qmp('migrate-set-capabilities',
capabilities=mig_caps)
self.assert_qmp(result, 'return', {})
self.add_bitmap(self.vm_a, granularity, persistent)
for r in regions:
self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
sha256 = self.get_bitmap_hash(self.vm_a)
result = self.vm_a.qmp('migrate', uri=mig_cmd)
while True:
event = self.vm_a.event_wait('MIGRATION')
if event['data']['status'] == 'completed':
break
while True:
result = self.vm_a.qmp('query-status')
if (result['return']['status'] == 'postmigrate'):
break
# test that bitmap is still here
removed = (not migrate_bitmaps) and persistent
self.check_bitmap(self.vm_a, False if removed else sha256)
result = self.vm_a.qmp('cont')
self.assert_qmp(result, 'return', {})
# test that bitmap is still here after invalidation
self.check_bitmap(self.vm_a, sha256)
# shutdown and check that invalidation didn't fail
self.vm_a.shutdown()
# catch 'Could not reopen qcow2 layer: Bitmap already exists'
# possible error
log = self.vm_a.get_log()
log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
log = re.sub(r'^(wrote .* bytes at offset .*\n.*KiB.*ops.*sec.*\n){3}',
'', log)
log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
self.assertEqual(log, '')
# test that bitmap is still persistent
self.vm_a.launch()
self.check_bitmap(self.vm_a, sha256 if persistent else False)
def do_test_migration(self, persistent, migrate_bitmaps, online,
shared_storage, pre_shutdown):
granularity = 512
# regions = ((start, count), ...)
regions = ((0, 0x10000),
(0xf0000, 0x10000),
(0xa0201, 0x1000))
should_migrate = \
(migrate_bitmaps and (persistent or not pre_shutdown)) or \
(persistent and shared_storage)
mig_caps = [{'capability': 'events', 'state': True}]
if migrate_bitmaps:
mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
self.vm_b.add_incoming(incoming_cmd if online else "defer")
self.vm_b.add_drive(disk_a if shared_storage else disk_b)
if online:
os.mkfifo(mig_file)
self.vm_b.launch()
result = self.vm_b.qmp('migrate-set-capabilities',
capabilities=mig_caps)
self.assert_qmp(result, 'return', {})
self.add_bitmap(self.vm_a, granularity, persistent)
for r in regions:
self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
sha256 = self.get_bitmap_hash(self.vm_a)
if pre_shutdown:
self.vm_a.shutdown()
self.vm_a.launch()
result = self.vm_a.qmp('migrate-set-capabilities',
capabilities=mig_caps)
self.assert_qmp(result, 'return', {})
result = self.vm_a.qmp('migrate', uri=mig_cmd)
while True:
event = self.vm_a.event_wait('MIGRATION')
if event['data']['status'] == 'completed':
break
if not online:
self.vm_a.shutdown()
self.vm_b.launch()
result = self.vm_b.qmp('migrate-set-capabilities',
capabilities=mig_caps)
self.assert_qmp(result, 'return', {})
result = self.vm_b.qmp('migrate-incoming', uri=incoming_cmd)
self.assert_qmp(result, 'return', {})
while True:
event = self.vm_b.event_wait('MIGRATION')
if event['data']['status'] == 'completed':
break
self.check_bitmap(self.vm_b, sha256 if should_migrate else False)
if should_migrate:
self.vm_b.shutdown()
# catch 'Could not reopen qcow2 layer: Bitmap already exists'
# possible error
log = self.vm_b.get_log()
log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
self.assertEqual(log, '')
# recreate vm_b, as we don't want -incoming option (this will lead
# to "cat" process left alive after test finish)
self.vm_b = iotests.VM(path_suffix='b')
self.vm_b.add_drive(disk_a if shared_storage else disk_b)
self.vm_b.launch()
self.check_bitmap(self.vm_b, sha256 if persistent else False)
def inject_test_case(klass, name, method, *args, **kwargs):
mc = operator.methodcaller(method, *args, **kwargs)
setattr(klass, 'test_' + method + name, lambda self: mc(self))
for cmb in list(itertools.product((True, False), repeat=5)):
name = ('_' if cmb[0] else '_not_') + 'persistent_'
name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
name += '_online' if cmb[2] else '_offline'
name += '_shared' if cmb[3] else '_nonshared'
if (cmb[4]):
name += '__pre_shutdown'
inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
*list(cmb))
for cmb in list(itertools.product((True, False), repeat=2)):
name = ('_' if cmb[0] else '_not_') + 'persistent_'
name += ('_' if cmb[1] else '_not_') + 'migbitmap'
inject_test_case(TestDirtyBitmapMigration, name,
'do_test_migration_resume_source', *list(cmb))
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'],
supported_protocols=['file'])
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