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 import re
  28 from iotests import qemu_img
  29
  30
  31 disk_a = os.path.join(iotests.test_dir, 'disk_a')
  32 disk_b = os.path.join(iotests.test_dir, 'disk_b')
  33 size = '1M'
  34 mig_file = os.path.join(iotests.test_dir, 'mig_file')
  35 mig_cmd = 'exec: cat > ' + mig_file
  36 incoming_cmd = 'exec: cat ' + mig_file
  37
  38
  39 class TestDirtyBitmapMigration(iotests.QMPTestCase):
  40     def tearDown(self):
  41         self.vm_a.shutdown()
  42         self.vm_b.shutdown()
  43         os.remove(disk_a)
  44         os.remove(disk_b)
  45         os.remove(mig_file)
  46
  47     def setUp(self):
  48         qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
  49         qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
  50
  51         self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a)
  52         self.vm_a.launch()
  53
  54         self.vm_b = iotests.VM(path_suffix='b')
  55
  56     def add_bitmap(self, vm, granularity, persistent):
  57         params = {'node': 'drive0',
  58                   'name': 'bitmap0',
  59                   'granularity': granularity}
  60         if persistent:
  61             params['persistent'] = True
  62
  63         result = vm.qmp('block-dirty-bitmap-add', **params)
  64         self.assert_qmp(result, 'return', {});
  65
  66     def get_bitmap_hash(self, vm):
  67         result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
  68                         node='drive0', name='bitmap0')
  69         return result['return']['sha256']
  70
  71     def check_bitmap(self, vm, sha256):
  72         result = vm.qmp('x-debug-block-dirty-bitmap-sha256',
  73                         node='drive0', name='bitmap0')
  74         if sha256:
  75             self.assert_qmp(result, 'return/sha256', sha256);
  76         else:
  77             self.assert_qmp(result, 'error/desc',
  78                             "Dirty bitmap 'bitmap0' not found");
  79
  80     def do_test_migration_resume_source(self, persistent, migrate_bitmaps):
  81         granularity = 512
  82
  83         # regions = ((start, count), ...)
  84         regions = ((0, 0x10000),
  85                    (0xf0000, 0x10000),
  86                    (0xa0201, 0x1000))
  87
  88         mig_caps = [{'capability': 'events', 'state': True}]
  89         if migrate_bitmaps:
  90             mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
  91
  92         result = self.vm_a.qmp('migrate-set-capabilities',
  93                                capabilities=mig_caps)
  94         self.assert_qmp(result, 'return', {})
  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         result = self.vm_a.qmp('migrate', uri=mig_cmd)
 102         while True:
 103             event = self.vm_a.event_wait('MIGRATION')
 104             if event['data']['status'] == 'completed':
 105                 break
 106
 107         # test that bitmap is still here
 108         removed = (not migrate_bitmaps) and persistent
 109         self.check_bitmap(self.vm_a, False if removed else sha256)
 110
 111         self.vm_a.qmp('cont')
 112
 113         # test that bitmap is still here after invalidation
 114         self.check_bitmap(self.vm_a, sha256)
 115
 116         # shutdown and check that invalidation didn't fail
 117         self.vm_a.shutdown()
 118
 119         # catch 'Could not reopen qcow2 layer: Bitmap already exists'
 120         # possible error
 121         log = self.vm_a.get_log()
 122         log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
 123         log = re.sub(r'^(wrote .* bytes at offset .*\n.*KiB.*ops.*sec.*\n){3}',
 124                      '', log)
 125         log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
 126         self.assertEqual(log, '')
 127
 128         # test that bitmap is still persistent
 129         self.vm_a.launch()
 130         self.check_bitmap(self.vm_a, sha256 if persistent else False)
 131
 132     def do_test_migration(self, persistent, migrate_bitmaps, online,
 133                           shared_storage):
 134         granularity = 512
 135
 136         # regions = ((start, count), ...)
 137         regions = ((0, 0x10000),
 138                    (0xf0000, 0x10000),
 139                    (0xa0201, 0x1000))
 140
 141         should_migrate = migrate_bitmaps or persistent and shared_storage
 142         mig_caps = [{'capability': 'events', 'state': True}]
 143         if migrate_bitmaps:
 144             mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
 145
 146         result = self.vm_a.qmp('migrate-set-capabilities',
 147                                capabilities=mig_caps)
 148         self.assert_qmp(result, 'return', {})
 149
 150         self.vm_b.add_incoming(incoming_cmd if online else "defer")
 151         self.vm_b.add_drive(disk_a if shared_storage else disk_b)
 152
 153         if online:
 154             os.mkfifo(mig_file)
 155             self.vm_b.launch()
 156             result = self.vm_b.qmp('migrate-set-capabilities',
 157                                    capabilities=mig_caps)
 158             self.assert_qmp(result, 'return', {})
 159
 160         self.add_bitmap(self.vm_a, granularity, persistent)
 161         for r in regions:
 162             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
 163         sha256 = self.get_bitmap_hash(self.vm_a)
 164
 165         result = self.vm_a.qmp('migrate', uri=mig_cmd)
 166         while True:
 167             event = self.vm_a.event_wait('MIGRATION')
 168             if event['data']['status'] == 'completed':
 169                 break
 170
 171         if not online:
 172             self.vm_a.shutdown()
 173             self.vm_b.launch()
 174             result = self.vm_b.qmp('migrate-set-capabilities',
 175                                    capabilities=mig_caps)
 176             self.assert_qmp(result, 'return', {})
 177             result = self.vm_b.qmp('migrate-incoming', uri=incoming_cmd)
 178             self.assert_qmp(result, 'return', {})
 179
 180         while True:
 181             event = self.vm_b.event_wait('MIGRATION')
 182             if event['data']['status'] == 'completed':
 183                 break
 184
 185         self.check_bitmap(self.vm_b, sha256 if should_migrate else False)
 186
 187         if should_migrate:
 188             self.vm_b.shutdown()
 189
 190             # catch 'Could not reopen qcow2 layer: Bitmap already exists'
 191             # possible error
 192             log = self.vm_b.get_log()
 193             log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
 194             log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
 195             self.assertEqual(log, '')
 196
 197             # recreate vm_b, as we don't want -incoming option (this will lead
 198             # to "cat" process left alive after test finish)
 199             self.vm_b = iotests.VM(path_suffix='b')
 200             self.vm_b.add_drive(disk_a if shared_storage else disk_b)
 201             self.vm_b.launch()
 202             self.check_bitmap(self.vm_b, sha256 if persistent else False)
 203
 204
 205 def inject_test_case(klass, name, method, *args, **kwargs):
 206     mc = operator.methodcaller(method, *args, **kwargs)
 207     setattr(klass, 'test_' + method + name, new.instancemethod(mc, None, klass))
 208
 209 for cmb in list(itertools.product((True, False), repeat=4)):
 210     name = ('_' if cmb[0] else '_not_') + 'persistent_'
 211     name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
 212     name += '_online' if cmb[2] else '_offline'
 213     name += '_shared' if cmb[3] else '_nonshared'
 214
 215     inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
 216                      *list(cmb))
 217
 218 for cmb in list(itertools.product((True, False), repeat=2)):
 219     name = ('_' if cmb[0] else '_not_') + 'persistent_'
 220     name += ('_' if cmb[1] else '_not_') + 'migbitmap'
 221
 222     inject_test_case(TestDirtyBitmapMigration, name,
 223                      'do_test_migration_resume_source', *list(cmb))
 224
 225 if __name__ == '__main__':
 226     iotests.main(supported_fmts=['qcow2'])