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 mig_cmd = 'exec: cat > ' + mig_file
  35 incoming_cmd = 'exec: cat ' + mig_file
  36
  37
  38 class TestDirtyBitmapMigration(iotests.QMPTestCase):
  39     def tearDown(self):
  40         self.vm_a.shutdown()
  41         self.vm_b.shutdown()
  42         os.remove(disk_a)
  43         os.remove(disk_b)
  44         os.remove(mig_file)
  45
  46     def setUp(self):
  47         qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
  48         qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
  49
  50         self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a)
  51         self.vm_a.launch()
  52
  53         self.vm_b = iotests.VM(path_suffix='b')
  54
  55     def add_bitmap(self, vm, granularity, persistent):
  56         params = {'node': 'drive0',
  57                   'name': 'bitmap0',
  58                   'granularity': granularity}
  59         if persistent:
  60             params['persistent'] = 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         mig_caps = [{'capability': 'events', 'state': True}]
  90         if migrate_bitmaps:
  91             mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
  92
  93         result = self.vm_a.qmp('migrate-set-capabilities',
  94                                capabilities=mig_caps)
  95         self.assert_qmp(result, 'return', {})
  96
  97         self.vm_b.add_incoming(incoming_cmd if online else "defer")
  98         self.vm_b.add_drive(disk_a if shared_storage else disk_b)
  99
 100         if online:
 101             os.mkfifo(mig_file)
 102             self.vm_b.launch()
 103             result = self.vm_b.qmp('migrate-set-capabilities',
 104                                    capabilities=mig_caps)
 105             self.assert_qmp(result, 'return', {})
 106
 107         self.add_bitmap(self.vm_a, granularity, persistent)
 108         for r in regions:
 109             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
 110         sha256 = self.get_bitmap_hash(self.vm_a)
 111
 112         result = self.vm_a.qmp('migrate', uri=mig_cmd)
 113         while True:
 114             event = self.vm_a.event_wait('MIGRATION')
 115             if event['data']['status'] == 'completed':
 116                 break
 117
 118         if not online:
 119             self.vm_a.shutdown()
 120             self.vm_b.launch()
 121             result = self.vm_b.qmp('migrate-set-capabilities',
 122                                    capabilities=mig_caps)
 123             self.assert_qmp(result, 'return', {})
 124             result = self.vm_b.qmp('migrate-incoming', uri=incoming_cmd)
 125             self.assert_qmp(result, 'return', {})
 126
 127         while True:
 128             event = self.vm_b.event_wait('MIGRATION')
 129             if event['data']['status'] == 'completed':
 130                 break
 131
 132         self.check_bitmap(self.vm_b, sha256 if should_migrate else False)
 133
 134         if should_migrate:
 135             self.vm_b.shutdown()
 136             # recreate vm_b, as we don't want -incoming option (this will lead
 137             # to "cat" process left alive after test finish)
 138             self.vm_b = iotests.VM(path_suffix='b')
 139             self.vm_b.add_drive(disk_a if shared_storage else disk_b)
 140             self.vm_b.launch()
 141             self.check_bitmap(self.vm_b, sha256 if persistent else False)
 142
 143
 144 def inject_test_case(klass, name, method, *args, **kwargs):
 145     mc = operator.methodcaller(method, *args, **kwargs)
 146     setattr(klass, 'test_' + name, new.instancemethod(mc, None, klass))
 147
 148 for cmb in list(itertools.product((True, False), repeat=4)):
 149     name = ('_' if cmb[0] else '_not_') + 'persistent_'
 150     name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
 151     name += '_online' if cmb[2] else '_offline'
 152     name += '_shared' if cmb[3] else '_nonshared'
 153
 154     inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
 155                      *list(cmb))
 156
 157
 158 if __name__ == '__main__':
 159     iotests.main(supported_fmts=['qcow2'])