xref: /qemu/tests/qemu-iotests/165 (revision 513823e7521a09ed7ad1e32e6454bac3b2cbf52d) 
1#!/usr/bin/env python3
2# group: rw quick
3#
4# Tests for persistent dirty bitmaps.
5#
6# Copyright: Vladimir Sementsov-Ogievskiy 2015-2017
7#
8# This program is free software; you can redistribute it and/or modify
9# it under the terms of the GNU General Public License as published by
10# the Free Software Foundation; either version 2 of the License, or
11# (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program.  If not, see <http://www.gnu.org/licenses/>.
20#
21
22import os
23import re
24import iotests
25from iotests import qemu_img
26
27disk = os.path.join(iotests.test_dir, 'disk')
28disk_size = 0x40000000 # 1G
29
30# regions for qemu_io: (start, count) in bytes
31regions1 = ((0x0fff00, 0x10000),
32            (0x200000, 0x100000))
33
34regions2 = ((0x10000000, 0x20000),
35            (0x3fff0000, 0x10000))
36
37class TestPersistentDirtyBitmap(iotests.QMPTestCase):
38
39    def setUp(self):
40        qemu_img('create', '-f', iotests.imgfmt, disk, str(disk_size))
41
42    def tearDown(self):
43        os.remove(disk)
44
45    def mkVm(self):
46        return iotests.VM().add_drive(disk, opts='node-name=node0')
47
48    def mkVmRo(self):
49        return iotests.VM().add_drive(disk, opts='readonly=on,node-name=node0')
50
51    def getSha256(self):
52        result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
53                             node='drive0', name='bitmap0')
54        return result['return']['sha256']
55
56    def checkBitmap(self, sha256):
57        result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
58                             node='drive0', name='bitmap0')
59        self.assert_qmp(result, 'return/sha256', sha256);
60
61    def writeRegions(self, regions):
62        for r in regions:
63            self.vm.hmp_qemu_io('drive0',
64                                'write %d %d' % r)
65
66    def qmpAddBitmap(self):
67        self.vm.qmp('block-dirty-bitmap-add', node='drive0',
68                    name='bitmap0', persistent=True)
69
70    def test_persistent(self):
71        self.vm = self.mkVm()
72        self.vm.launch()
73        self.qmpAddBitmap()
74
75        self.writeRegions(regions1)
76        sha256 = self.getSha256()
77
78        self.vm.shutdown()
79
80        self.vm = self.mkVmRo()
81        self.vm.launch()
82        self.vm.shutdown()
83
84        #catch 'Persistent bitmaps are lost' possible error
85        log = iotests.filter_qtest(self.vm.get_log())
86        if log:
87            print(log)
88
89        self.vm = self.mkVm()
90        self.vm.launch()
91
92        self.checkBitmap(sha256)
93        self.writeRegions(regions2)
94        sha256 = self.getSha256()
95
96        self.vm.shutdown()
97        self.vm.launch()
98
99        self.checkBitmap(sha256)
100
101        self.vm.shutdown()
102
103    def test_reopen_rw(self):
104        self.vm = self.mkVm()
105        self.vm.launch()
106        self.qmpAddBitmap()
107
108        # Calculate hashes
109
110        self.writeRegions(regions1)
111        sha256_1 = self.getSha256()
112
113        self.writeRegions(regions2)
114        sha256_2 = self.getSha256()
115        assert sha256_1 != sha256_2 # Otherwise, it's not very interesting.
116
117        self.vm.cmd('block-dirty-bitmap-clear', node='drive0',
118                    name='bitmap0')
119
120        # Start with regions1
121
122        self.writeRegions(regions1)
123        assert sha256_1 == self.getSha256()
124
125        self.vm.shutdown()
126
127        self.vm = self.mkVmRo()
128        self.vm.launch()
129
130        assert sha256_1 == self.getSha256()
131
132        # Check that we are in RO mode and can't modify bitmap.
133        self.writeRegions(regions2)
134        assert sha256_1 == self.getSha256()
135
136        # Reopen to RW
137        self.vm.cmd('blockdev-reopen', options=[{
138            'node-name': 'node0',
139            'driver': iotests.imgfmt,
140            'file': {
141                'driver': 'file',
142                'filename': disk
143            },
144            'read-only': False
145        }])
146
147        # Check that bitmap is reopened to RW and we can write to it.
148        self.writeRegions(regions2)
149        assert sha256_2 == self.getSha256()
150
151        self.vm.shutdown()
152
153
154if __name__ == '__main__':
155    iotests.main(supported_fmts=['qcow2'],
156                 supported_protocols=['file'],
157                 unsupported_imgopts=['compat'])
158