xref: /qemu/tests/qemu-iotests/165 (revision abff1abf) 
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
21import os
22import re
23import iotests
24from iotests import qemu_img
25
26disk = os.path.join(iotests.test_dir, 'disk')
27disk_size = 0x40000000 # 1G
28
29# regions for qemu_io: (start, count) in bytes
30regions1 = ((0x0fff00, 0x10000),
31            (0x200000, 0x100000))
32
33regions2 = ((0x10000000, 0x20000),
34            (0x3fff0000, 0x10000))
35
36class 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
157if __name__ == '__main__':
158    iotests.main(supported_fmts=['qcow2'],
159                 supported_protocols=['file'])
160