tests/qemu-iotests/165

   1 #!/usr/bin/env python3
   2 #
   3 # Tests for persistent dirty bitmaps.
   4 #
   5 # Copyright: Vladimir Sementsov-Ogievskiy 2015-2017
   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 re
  23 import iotests
  24 from iotests import qemu_img
  25
  26 disk = os.path.join(iotests.test_dir, 'disk')
  27 disk_size = 0x40000000 # 1G
  28
  29 # regions for qemu_io: (start, count) in bytes
  30 regions1 = ((0x0fff00, 0x10000),
  31             (0x200000, 0x100000))
  32
  33 regions2 = ((0x10000000, 0x20000),
  34             (0x3fff0000, 0x10000))
  35
  36 class TestPersistentDirtyBitmap(iotests.QMPTestCase):
  37
  38     def setUp(self):
  39         qemu_img('create', '-f', iotests.imgfmt, disk, str(disk_size))
  40
  41     def tearDown(self):
  42         os.remove(disk)
  43
  44     def mkVm(self):
  45         return iotests.VM().add_drive(disk, opts='node-name=node0')
  46
  47     def mkVmRo(self):
  48         return iotests.VM().add_drive(disk, opts='readonly=on,node-name=node0')
  49
  50     def getSha256(self):
  51         result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
  52                              node='drive0', name='bitmap0')
  53         return result['return']['sha256']
  54
  55     def checkBitmap(self, sha256):
  56         result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
  57                              node='drive0', name='bitmap0')
  58         self.assert_qmp(result, 'return/sha256', sha256);
  59
  60     def writeRegions(self, regions):
  61         for r in regions:
  62             self.vm.hmp_qemu_io('drive0',
  63                                 'write %d %d' % r)
  64
  65     def qmpAddBitmap(self):
  66         self.vm.qmp('block-dirty-bitmap-add', node='drive0',
  67                     name='bitmap0', persistent=True)
  68
  69     def test_persistent(self):
  70         self.vm = self.mkVm()
  71         self.vm.launch()
  72         self.qmpAddBitmap()
  73
  74         self.writeRegions(regions1)
  75         sha256 = self.getSha256()
  76
  77         self.vm.shutdown()
  78
  79         self.vm = self.mkVmRo()
  80         self.vm.launch()
  81         self.vm.shutdown()
  82
  83         #catch 'Persistent bitmaps are lost' possible error
  84         log = self.vm.get_log()
  85         log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
  86         log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
  87         if log:
  88             print(log)
  89
  90         self.vm = self.mkVm()
  91         self.vm.launch()
  92
  93         self.checkBitmap(sha256)
  94         self.writeRegions(regions2)
  95         sha256 = self.getSha256()
  96
  97         self.vm.shutdown()
  98         self.vm.launch()
  99
 100         self.checkBitmap(sha256)
 101
 102         self.vm.shutdown()
 103
 104     def test_reopen_rw(self):
 105         self.vm = self.mkVm()
 106         self.vm.launch()
 107         self.qmpAddBitmap()
 108
 109         # Calculate hashes
 110
 111         self.writeRegions(regions1)
 112         sha256_1 = self.getSha256()
 113
 114         self.writeRegions(regions2)
 115         sha256_2 = self.getSha256()
 116         assert sha256_1 != sha256_2 # Otherwise, it's not very interesting.
 117
 118         result = self.vm.qmp('block-dirty-bitmap-clear', node='drive0',
 119                              name='bitmap0')
 120         self.assert_qmp(result, 'return', {})
 121
 122         # Start with regions1
 123
 124         self.writeRegions(regions1)
 125         assert sha256_1 == self.getSha256()
 126
 127         self.vm.shutdown()
 128
 129         self.vm = self.mkVmRo()
 130         self.vm.launch()
 131
 132         assert sha256_1 == self.getSha256()
 133
 134         # Check that we are in RO mode and can't modify bitmap.
 135         self.writeRegions(regions2)
 136         assert sha256_1 == self.getSha256()
 137
 138         # Reopen to RW
 139         result = self.vm.qmp('x-blockdev-reopen', **{
 140             'node-name': 'node0',
 141             'driver': iotests.imgfmt,
 142             'file': {
 143                 'driver': 'file',
 144                 'filename': disk
 145             },
 146             'read-only': False
 147         })
 148         self.assert_qmp(result, 'return', {})
 149
 150         # Check that bitmap is reopened to RW and we can write to it.
 151         self.writeRegions(regions2)
 152         assert sha256_2 == self.getSha256()
 153
 154         self.vm.shutdown()
 155
 156
 157 if __name__ == '__main__':
 158     iotests.main(supported_fmts=['qcow2'],
 159                  supported_protocols=['file'])