1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
#!/usr/bin/env python3
# group: rw quick
#
# Tests for persistent dirty bitmaps.
#
# Copyright: Vladimir Sementsov-Ogievskiy 2015-2017
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import os
import re
import iotests
from iotests import qemu_img
disk = os.path.join(iotests.test_dir, 'disk')
disk_size = 0x40000000 # 1G
# regions for qemu_io: (start, count) in bytes
regions1 = ((0x0fff00, 0x10000),
(0x200000, 0x100000))
regions2 = ((0x10000000, 0x20000),
(0x3fff0000, 0x10000))
class TestPersistentDirtyBitmap(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, disk, str(disk_size))
def tearDown(self):
os.remove(disk)
def mkVm(self):
return iotests.VM().add_drive(disk, opts='node-name=node0')
def mkVmRo(self):
return iotests.VM().add_drive(disk, opts='readonly=on,node-name=node0')
def getSha256(self):
result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap0')
return result['return']['sha256']
def checkBitmap(self, sha256):
result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
node='drive0', name='bitmap0')
self.assert_qmp(result, 'return/sha256', sha256);
def writeRegions(self, regions):
for r in regions:
self.vm.hmp_qemu_io('drive0',
'write %d %d' % r)
def qmpAddBitmap(self):
self.vm.qmp('block-dirty-bitmap-add', node='drive0',
name='bitmap0', persistent=True)
def test_persistent(self):
self.vm = self.mkVm()
self.vm.launch()
self.qmpAddBitmap()
self.writeRegions(regions1)
sha256 = self.getSha256()
self.vm.shutdown()
self.vm = self.mkVmRo()
self.vm.launch()
self.vm.shutdown()
#catch 'Persistent bitmaps are lost' possible error
log = self.vm.get_log()
log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
if log:
print(log)
self.vm = self.mkVm()
self.vm.launch()
self.checkBitmap(sha256)
self.writeRegions(regions2)
sha256 = self.getSha256()
self.vm.shutdown()
self.vm.launch()
self.checkBitmap(sha256)
self.vm.shutdown()
def test_reopen_rw(self):
self.vm = self.mkVm()
self.vm.launch()
self.qmpAddBitmap()
# Calculate hashes
self.writeRegions(regions1)
sha256_1 = self.getSha256()
self.writeRegions(regions2)
sha256_2 = self.getSha256()
assert sha256_1 != sha256_2 # Otherwise, it's not very interesting.
result = self.vm.qmp('block-dirty-bitmap-clear', node='drive0',
name='bitmap0')
self.assert_qmp(result, 'return', {})
# Start with regions1
self.writeRegions(regions1)
assert sha256_1 == self.getSha256()
self.vm.shutdown()
self.vm = self.mkVmRo()
self.vm.launch()
assert sha256_1 == self.getSha256()
# Check that we are in RO mode and can't modify bitmap.
self.writeRegions(regions2)
assert sha256_1 == self.getSha256()
# Reopen to RW
result = self.vm.qmp('x-blockdev-reopen', **{
'node-name': 'node0',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': disk
},
'read-only': False
})
self.assert_qmp(result, 'return', {})
# Check that bitmap is reopened to RW and we can write to it.
self.writeRegions(regions2)
assert sha256_2 == self.getSha256()
self.vm.shutdown()
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'],
supported_protocols=['file'])
|
