tests/qemu-iotests/169

   1 #!/usr/bin/env python
   2 #
   3 # Tests for dirty bitmaps migration.
   4 #
   5 # Copyright (c) 2016-2017 Virtuozzo International GmbH. All rights reserved.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 import os
  22 import iotests
  23 import time
  24 import itertools
  25 import operator
  26 import new
  27 from iotests import qemu_img
  28
  29
  30 disk_a = os.path.join(iotests.test_dir, 'disk_a')
  31 disk_b = os.path.join(iotests.test_dir, 'disk_b')
  32 size = '1M'
  33 mig_file = os.path.join(iotests.test_dir, 'mig_file')
  34
  35
  36 class TestDirtyBitmapMigration(iotests.QMPTestCase):
  37     def tearDown(self):
  38         self.vm_a.shutdown()
  39         self.vm_b.shutdown()
  40         os.remove(disk_a)
  41         os.remove(disk_b)
  42         os.remove(mig_file)
  43
  44     def setUp(self):
  45         qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
  46         qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
  47
  48         self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a)
  49         self.vm_a.launch()
  50
  51         self.vm_b = iotests.VM(path_suffix='b')
  52         self.vm_b.add_incoming("exec: cat '" + mig_file + "'")
  53
  54     def add_bitmap(self, vm, granularity, persistent):
  55         params = {'node': 'drive0',
  56                   'name': 'bitmap0',
  57                   'granularity': granularity}
  58         if persistent:
  59             params['persistent'] = True
  60             params['autoload'] = True
  61
  62         result = vm.qmp('block-dirty-bitmap-add', **params)
  63         self.assert_qmp(result, 'return', {});
  64
  65     def get_bitmap_hash(self, vm):
  66         result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
  67                         node='drive0', name='bitmap0')
  68         return result['return']['sha256']
  69
  70     def check_bitmap(self, vm, sha256):
  71         result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
  72                         node='drive0', name='bitmap0')
  73         if sha256:
  74             self.assert_qmp(result, 'return/sha256', sha256);
  75         else:
  76             self.assert_qmp(result, 'error/desc',
  77                             "Dirty bitmap 'bitmap0' not found");
  78
  79     def do_test_migration(self, persistent, migrate_bitmaps, online,
  80                           shared_storage):
  81         granularity = 512
  82
  83         # regions = ((start, count), ...)
  84         regions = ((0, 0x10000),
  85                    (0xf0000, 0x10000),
  86                    (0xa0201, 0x1000))
  87
  88         should_migrate = migrate_bitmaps or persistent and shared_storage
  89
  90         self.vm_b.add_drive(disk_a if shared_storage else disk_b)
  91
  92         if online:
  93             os.mkfifo(mig_file)
  94             self.vm_b.launch()
  95
  96         self.add_bitmap(self.vm_a, granularity, persistent)
  97         for r in regions:
  98             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
  99         sha256 = self.get_bitmap_hash(self.vm_a)
 100
 101         if migrate_bitmaps:
 102             capabilities = [{'capability': 'dirty-bitmaps', 'state': True}]
 103
 104             result = self.vm_a.qmp('migrate-set-capabilities',
 105                                    capabilities=capabilities)
 106             self.assert_qmp(result, 'return', {})
 107
 108             if online:
 109                 result = self.vm_b.qmp('migrate-set-capabilities',
 110                                        capabilities=capabilities)
 111                 self.assert_qmp(result, 'return', {})
 112
 113         result = self.vm_a.qmp('migrate-set-capabilities',
 114                                capabilities=[{'capability': 'events',
 115                                               'state': True}])
 116         self.assert_qmp(result, 'return', {})
 117
 118         result = self.vm_a.qmp('migrate', uri='exec:cat>' + mig_file)
 119         while True:
 120             event = self.vm_a.event_wait('MIGRATION')
 121             if event['data']['status'] == 'completed':
 122                 break
 123
 124         if not online:
 125             self.vm_a.shutdown()
 126             self.vm_b.launch()
 127             # TODO enable bitmap capability for vm_b in this case
 128
 129         self.vm_b.event_wait("RESUME", timeout=10.0)
 130
 131         self.check_bitmap(self.vm_b, sha256 if should_migrate else False)
 132
 133         if should_migrate:
 134             self.vm_b.shutdown()
 135             self.vm_b.launch()
 136             self.check_bitmap(self.vm_b, sha256 if persistent else False)
 137
 138
 139 def inject_test_case(klass, name, method, *args, **kwargs):
 140     mc = operator.methodcaller(method, *args, **kwargs)
 141     setattr(klass, 'test_' + name, new.instancemethod(mc, None, klass))
 142
 143 for cmb in list(itertools.product((True, False), repeat=4)):
 144     name = ('_' if cmb[0] else '_not_') + 'persistent_'
 145     name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
 146     name += '_online' if cmb[2] else '_offline'
 147     name += '_shared' if cmb[3] else '_nonshared'
 148
 149     inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
 150                      *list(cmb))
 151
 152
 153 if __name__ == '__main__':
 154     iotests.main(supported_fmts=['qcow2'])