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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
#!/usr/bin/env python
#
# Test whether the backing BDSs are correct after completion of a
# mirror block job; in "existing" modes (drive-mirror with
# mode=existing and blockdev-mirror) the backing chain should not be
# overridden.
#
# Copyright (C) 2016 Red Hat, Inc.
#
# 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 iotests
from iotests import qemu_img
back0_img = os.path.join(iotests.test_dir, 'back0.' + iotests.imgfmt)
back1_img = os.path.join(iotests.test_dir, 'back1.' + iotests.imgfmt)
back2_img = os.path.join(iotests.test_dir, 'back2.' + iotests.imgfmt)
source_img = os.path.join(iotests.test_dir, 'source.' + iotests.imgfmt)
target_img = os.path.join(iotests.test_dir, 'target.' + iotests.imgfmt)
# Class variables for controlling its behavior:
#
# existing: If True, explicitly create the target image and blockdev-add it
# target_backing: If existing is True: Use this filename as the backing file
# of the target image
# (None: no backing file)
# target_blockdev_backing: If existing is True: Pass this dict as "backing"
# for the blockdev-add command
# (None: do not pass "backing")
# target_real_backing: If existing is True: The real filename of the backing
# image during runtime, only makes sense if
# target_blockdev_backing is not None
# (None: same as target_backing)
class BaseClass(iotests.QMPTestCase):
target_blockdev_backing = None
target_real_backing = None
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, back0_img, '1M')
qemu_img('create', '-f', iotests.imgfmt, '-b', back0_img, back1_img)
qemu_img('create', '-f', iotests.imgfmt, '-b', back1_img, back2_img)
qemu_img('create', '-f', iotests.imgfmt, '-b', back2_img, source_img)
self.vm = iotests.VM()
self.vm.add_drive(None, '', 'none')
self.vm.launch()
# Add the BDS via blockdev-add so it stays around after the mirror block
# job has been completed
result = self.vm.qmp('blockdev-add',
options={'node-name': 'source',
'driver': iotests.imgfmt,
'file': {'driver': 'file',
'filename': source_img}})
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('x-blockdev-insert-medium',
device='drive0', node_name='source')
self.assert_qmp(result, 'return', {})
self.assertIntactSourceBackingChain()
if self.existing:
if self.target_backing:
qemu_img('create', '-f', iotests.imgfmt,
'-b', self.target_backing, target_img, '1M')
else:
qemu_img('create', '-f', iotests.imgfmt, target_img, '1M')
if self.cmd == 'blockdev-mirror':
options = { 'node-name': 'target',
'driver': iotests.imgfmt,
'file': { 'driver': 'file',
'filename': target_img } }
if self.target_blockdev_backing:
options['backing'] = self.target_blockdev_backing
result = self.vm.qmp('blockdev-add', options=options)
self.assert_qmp(result, 'return', {})
def tearDown(self):
self.vm.shutdown()
os.remove(source_img)
os.remove(back2_img)
os.remove(back1_img)
os.remove(back0_img)
try:
os.remove(target_img)
except OSError:
pass
def findBlockNode(self, node_name, id=None):
if id:
result = self.vm.qmp('query-block')
for device in result['return']:
if device['device'] == id:
if node_name:
self.assert_qmp(device, 'inserted/node-name', node_name)
return device['inserted']
else:
result = self.vm.qmp('query-named-block-nodes')
for node in result['return']:
if node['node-name'] == node_name:
return node
self.fail('Cannot find node %s/%s' % (id, node_name))
def assertIntactSourceBackingChain(self):
node = self.findBlockNode('source')
self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename',
source_img)
self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename',
back2_img)
self.assert_qmp(node, 'image' + '/backing-image' * 2 + '/filename',
back1_img)
self.assert_qmp(node, 'image' + '/backing-image' * 3 + '/filename',
back0_img)
self.assert_qmp_absent(node, 'image' + '/backing-image' * 4)
def assertCorrectBackingImage(self, node, default_image):
if self.existing:
if self.target_real_backing:
image = self.target_real_backing
else:
image = self.target_backing
else:
image = default_image
if image:
self.assert_qmp(node, 'image/backing-image/filename', image)
else:
self.assert_qmp_absent(node, 'image/backing-image')
# Class variables for controlling its behavior:
#
# cmd: Mirroring command to execute, either drive-mirror or blockdev-mirror
class MirrorBaseClass(BaseClass):
def runMirror(self, sync):
if self.cmd == 'blockdev-mirror':
result = self.vm.qmp(self.cmd, device='drive0', sync=sync,
target='target')
else:
if self.existing:
mode = 'existing'
else:
mode = 'absolute-paths'
result = self.vm.qmp(self.cmd, device='drive0', sync=sync,
target=target_img, format=iotests.imgfmt,
mode=mode, node_name='target')
self.assert_qmp(result, 'return', {})
self.vm.event_wait('BLOCK_JOB_READY')
result = self.vm.qmp('block-job-complete', device='drive0')
self.assert_qmp(result, 'return', {})
self.vm.event_wait('BLOCK_JOB_COMPLETED')
def testFull(self):
self.runMirror('full')
node = self.findBlockNode('target', 'drive0')
self.assertCorrectBackingImage(node, None)
self.assertIntactSourceBackingChain()
def testTop(self):
self.runMirror('top')
node = self.findBlockNode('target', 'drive0')
self.assertCorrectBackingImage(node, back2_img)
self.assertIntactSourceBackingChain()
def testNone(self):
self.runMirror('none')
node = self.findBlockNode('target', 'drive0')
self.assertCorrectBackingImage(node, source_img)
self.assertIntactSourceBackingChain()
class TestDriveMirrorAbsolutePaths(MirrorBaseClass):
cmd = 'drive-mirror'
existing = False
class TestDriveMirrorExistingNoBacking(MirrorBaseClass):
cmd = 'drive-mirror'
existing = True
target_backing = None
class TestDriveMirrorExistingBacking(MirrorBaseClass):
cmd = 'drive-mirror'
existing = True
target_backing = 'null-co://'
class TestBlockdevMirrorNoBacking(MirrorBaseClass):
cmd = 'blockdev-mirror'
existing = True
target_backing = None
class TestBlockdevMirrorBacking(MirrorBaseClass):
cmd = 'blockdev-mirror'
existing = True
target_backing = 'null-co://'
class TestBlockdevMirrorForcedBacking(MirrorBaseClass):
cmd = 'blockdev-mirror'
existing = True
target_backing = None
target_blockdev_backing = { 'driver': 'null-co' }
target_real_backing = 'null-co://'
class TestCommit(BaseClass):
existing = False
def testCommit(self):
result = self.vm.qmp('block-commit', device='drive0', base=back1_img)
self.assert_qmp(result, 'return', {})
self.vm.event_wait('BLOCK_JOB_READY')
result = self.vm.qmp('block-job-complete', device='drive0')
self.assert_qmp(result, 'return', {})
self.vm.event_wait('BLOCK_JOB_COMPLETED')
node = self.findBlockNode(None, 'drive0')
self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename',
back1_img)
self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename',
back0_img)
self.assert_qmp_absent(node, 'image' + '/backing-image' * 2 +
'/filename')
self.assertIntactSourceBackingChain()
BaseClass = None
MirrorBaseClass = None
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'])
|
