tests/qemu-iotests/199

   1 #!/usr/bin/env python3
   2 #
   3 # Tests for dirty bitmaps postcopy 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 from iotests import qemu_img
  25
  26 disk_a = os.path.join(iotests.test_dir, 'disk_a')
  27 disk_b = os.path.join(iotests.test_dir, 'disk_b')
  28 size = '256G'
  29 fifo = os.path.join(iotests.test_dir, 'mig_fifo')
  30
  31 class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase):
  32
  33     def tearDown(self):
  34         self.vm_a.shutdown()
  35         self.vm_b.shutdown()
  36         os.remove(disk_a)
  37         os.remove(disk_b)
  38         os.remove(fifo)
  39
  40     def setUp(self):
  41         os.mkfifo(fifo)
  42         qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
  43         qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
  44         self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a)
  45         self.vm_b = iotests.VM(path_suffix='b').add_drive(disk_b)
  46         self.vm_b.add_incoming("exec: cat '" + fifo + "'")
  47         self.vm_a.launch()
  48         self.vm_b.launch()
  49
  50     def test_postcopy(self):
  51         write_size = 0x40000000
  52         granularity = 512
  53         chunk = 4096
  54
  55         result = self.vm_a.qmp('block-dirty-bitmap-add', node='drive0',
  56                                name='bitmap', granularity=granularity)
  57         self.assert_qmp(result, 'return', {});
  58
  59         s = 0
  60         while s < write_size:
  61             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
  62             s += 0x10000
  63         s = 0x8000
  64         while s < write_size:
  65             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
  66             s += 0x10000
  67
  68         result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
  69                                node='drive0', name='bitmap')
  70         sha256 = result['return']['sha256']
  71
  72         result = self.vm_a.qmp('block-dirty-bitmap-clear', node='drive0',
  73                                name='bitmap')
  74         self.assert_qmp(result, 'return', {});
  75         s = 0
  76         while s < write_size:
  77             self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
  78             s += 0x10000
  79
  80         bitmaps_cap = {'capability': 'dirty-bitmaps', 'state': True}
  81         events_cap = {'capability': 'events', 'state': True}
  82
  83         result = self.vm_a.qmp('migrate-set-capabilities',
  84                                capabilities=[bitmaps_cap, events_cap])
  85         self.assert_qmp(result, 'return', {})
  86
  87         result = self.vm_b.qmp('migrate-set-capabilities',
  88                                capabilities=[bitmaps_cap])
  89         self.assert_qmp(result, 'return', {})
  90
  91         result = self.vm_a.qmp('migrate', uri='exec:cat>' + fifo)
  92         self.assert_qmp(result, 'return', {})
  93
  94         result = self.vm_a.qmp('migrate-start-postcopy')
  95         self.assert_qmp(result, 'return', {})
  96
  97         while True:
  98             event = self.vm_a.event_wait('MIGRATION')
  99             if event['data']['status'] == 'completed':
 100                 break
 101
 102         s = 0x8000
 103         while s < write_size:
 104             self.vm_b.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk))
 105             s += 0x10000
 106
 107         result = self.vm_b.qmp('query-block');
 108         while len(result['return'][0]['dirty-bitmaps']) > 1:
 109             time.sleep(2)
 110             result = self.vm_b.qmp('query-block');
 111
 112         result = self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256',
 113                                node='drive0', name='bitmap')
 114
 115         self.assert_qmp(result, 'return/sha256', sha256);
 116
 117 if __name__ == '__main__':
 118     iotests.main(supported_fmts=['qcow2'], supported_cache_modes=['none'],
 119                  supported_protocols=['file'])