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             params['autoload'] = 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(self, persistent, migrate_bitmaps, online,
  81                           shared_storage):
  82         granularity = 512
  83
  84         # regions = ((start, count), ...)
  85         regions = ((0, 0x10000),
  86                    (0xf0000, 0x10000),
  87                    (0xa0201, 0x1000))
  88
  89         should_migrate = migrate_bitmaps or persistent and shared_storage
  90         mig_caps = [{'capability': 'events', 'state': True}]
  91         if migrate_bitmaps:
  92             mig_caps.append({'capability': 'dirty-bitmaps', 'state': True})
  93
  94         result = self.vm_a.qmp('migrate-set-capabilities',
  95                                capabilities=mig_caps)
  96         self.assert_qmp(result, 'return', {})
  97
  98         self.vm_b.add_incoming(incoming_cmd if online else "defer")
  99         self.vm_b.add_drive(disk_a if shared_storage else disk_b)
 100
 101         if online:
 102             os.mkfifo(mig_file)
 103             self.vm_b.launch()
 104             result = self.vm_b.qmp('migrate-set-capabilities',
 105                                    capabilities=mig_caps)
 106             self.assert_qmp(result, 'return', {})
 107
 108         self.add_bitmap(self.vm_a, granularity, persistent)
 109         for r in regions:
 110             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % r)
 111         sha256 = self.get_bitmap_hash(self.vm_a)
 112
 113         result = self.vm_a.qmp('migrate', uri=mig_cmd)
 114         while True:
 115             event = self.vm_a.event_wait('MIGRATION')
 116             if event['data']['status'] == 'completed':
 117                 break
 118
 119         if not online:
 120             self.vm_a.shutdown()
 121             self.vm_b.launch()
 122             result = self.vm_b.qmp('migrate-set-capabilities',
 123                                    capabilities=mig_caps)
 124             self.assert_qmp(result, 'return', {})
 125             result = self.vm_b.qmp('migrate-incoming', uri=incoming_cmd)
 126             self.assert_qmp(result, 'return', {})
 127
 128         while True:
 129             event = self.vm_b.event_wait('MIGRATION')
 130             if event['data']['status'] == 'completed':
 131                 break
 132
 133         self.check_bitmap(self.vm_b, sha256 if should_migrate else False)
 134
 135         if should_migrate:
 136             self.vm_b.shutdown()
 137             # recreate vm_b, as we don't want -incoming option (this will lead
 138             # to "cat" process left alive after test finish)
 139             self.vm_b = iotests.VM(path_suffix='b')
 140             self.vm_b.add_drive(disk_a if shared_storage else disk_b)
 141             self.vm_b.launch()
 142             self.check_bitmap(self.vm_b, sha256 if persistent else False)
 143
 144
 145 def inject_test_case(klass, name, method, *args, **kwargs):
 146     mc = operator.methodcaller(method, *args, **kwargs)
 147     setattr(klass, 'test_' + name, new.instancemethod(mc, None, klass))
 148
 149 for cmb in list(itertools.product((True, False), repeat=4)):
 150     name = ('_' if cmb[0] else '_not_') + 'persistent_'
 151     name += ('_' if cmb[1] else '_not_') + 'migbitmap_'
 152     name += '_online' if cmb[2] else '_offline'
 153     name += '_shared' if cmb[3] else '_nonshared'
 154
 155     inject_test_case(TestDirtyBitmapMigration, name, 'do_test_migration',
 156                      *list(cmb))
 157
 158
 159 if __name__ == '__main__':
 160     iotests.main(supported_fmts=['qcow2'])