xref: /openbmc/qemu/tests/qemu-iotests/274 (revision 87b804ec)
1#!/usr/bin/env python3
2#
3# Copyright (C) 2019 Red Hat, Inc.
4#
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 2 of the License, or
8# (at your option) any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program.  If not, see <http://www.gnu.org/licenses/>.
17#
18# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
19#
20# Some tests for short backing files and short overlays
21
22import iotests
23
24iotests.script_initialize(supported_fmts=['qcow2'],
25                          supported_platforms=['linux'])
26
27size_short = 1 * 1024 * 1024
28size_long = 2 * 1024 * 1024
29size_diff = size_long - size_short
30
31def create_chain() -> None:
32    iotests.qemu_img_log('create', '-f', iotests.imgfmt, base,
33                         str(size_long))
34    iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base,
35                         '-F', iotests.imgfmt, mid, str(size_short))
36    iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', mid,
37                         '-F', iotests.imgfmt, top, str(size_long))
38
39    iotests.qemu_io_log('-c', 'write -P 1 0 %d' % size_long, base)
40
41def create_vm() -> iotests.VM:
42    vm = iotests.VM()
43    vm.add_blockdev('file,filename=%s,node-name=base-file' % base)
44    vm.add_blockdev('%s,file=base-file,node-name=base' % iotests.imgfmt)
45    vm.add_blockdev('file,filename=%s,node-name=mid-file' % mid)
46    vm.add_blockdev('%s,file=mid-file,node-name=mid,backing=base'
47                    % iotests.imgfmt)
48    vm.add_drive(top, 'backing=mid,node-name=top')
49    return vm
50
51with iotests.FilePath('base') as base, \
52     iotests.FilePath('mid') as mid, \
53     iotests.FilePath('top') as top:
54
55    iotests.log('== Commit tests ==')
56
57    create_chain()
58
59    iotests.log('=== Check visible data ===')
60
61    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, top)
62    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), top)
63
64    iotests.log('=== Checking allocation status ===')
65
66    iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short,
67                        '-c', 'alloc %d %d' % (size_short, size_diff),
68                        base)
69
70    iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short,
71                        '-c', 'alloc %d %d' % (size_short, size_diff),
72                        mid)
73
74    iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short,
75                        '-c', 'alloc %d %d' % (size_short, size_diff),
76                        top)
77
78    iotests.log('=== Checking map ===')
79
80    iotests.qemu_img_log('map', '--output=json', base)
81    iotests.qemu_img_log('map', '--output=human', base)
82    iotests.qemu_img_log('map', '--output=json', mid)
83    iotests.qemu_img_log('map', '--output=human', mid)
84    iotests.qemu_img_log('map', '--output=json', top)
85    iotests.qemu_img_log('map', '--output=human', top)
86
87    iotests.log('=== Testing qemu-img commit (top -> mid) ===')
88
89    iotests.qemu_img_log('commit', top)
90    iotests.img_info_log(mid)
91    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid)
92    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid)
93
94    iotests.log('=== Testing HMP commit (top -> mid) ===')
95
96    create_chain()
97    with create_vm() as vm:
98        vm.launch()
99        vm.qmp_log('human-monitor-command', command_line='commit drive0')
100
101    iotests.img_info_log(mid)
102    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid)
103    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid)
104
105    iotests.log('=== Testing QMP active commit (top -> mid) ===')
106
107    create_chain()
108    with create_vm() as vm:
109        vm.launch()
110        vm.qmp_log('block-commit', device='top', base_node='mid',
111                   job_id='job0', auto_dismiss=False)
112        vm.run_job('job0', wait=5)
113
114    iotests.img_info_log(mid)
115    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid)
116    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid)
117
118    iotests.log('=== Testing qemu-img commit (top -> base) ===')
119
120    create_chain()
121    iotests.qemu_img_log('commit', '-b', base, top)
122    iotests.img_info_log(base)
123    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, base)
124    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), base)
125
126    iotests.log('=== Testing QMP active commit (top -> base) ===')
127
128    create_chain()
129    with create_vm() as vm:
130        vm.launch()
131        vm.qmp_log('block-commit', device='top', base_node='base',
132                   job_id='job0', auto_dismiss=False)
133        vm.run_job('job0', wait=5)
134
135    iotests.img_info_log(mid)
136    iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, base)
137    iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), base)
138
139    iotests.log('== Resize tests ==')
140
141    # Use different sizes for different allocation modes:
142    #
143    # We want to have at least one test where 32 bit truncation in the size of
144    # the overlapping area becomes visible. This is covered by the
145    # prealloc='off' case (1G to 6G is an overlap of 5G).
146    #
147    # However, we can only do this for modes that don't preallocate data
148    # because otherwise we might run out of space on the test host.
149    #
150    # We also want to test some unaligned combinations.
151    for (prealloc, base_size, top_size_old, top_size_new, off) in [
152            ('off',       '6G',    '1G',   '8G',   '5G'),
153            ('metadata', '32G',   '30G',  '33G',  '31G'),
154            ('falloc',   '10M',    '5M',  '15M',   '9M'),
155            ('full',     '16M',    '8M',  '12M',  '11M'),
156            ('off',      '384k', '253k', '512k', '253k'),
157            ('off',      '400k', '256k', '512k', '336k'),
158            ('off',      '512k', '256k', '500k', '436k')]:
159
160        iotests.log('=== preallocation=%s ===' % prealloc)
161        iotests.qemu_img_log('create', '-f', iotests.imgfmt, base, base_size)
162        iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base,
163                             '-F', iotests.imgfmt, top, top_size_old)
164        iotests.qemu_io_log('-c', 'write -P 1 %s 64k' % off, base)
165
166        # After this, top_size_old to base_size should be allocated/zeroed.
167        #
168        # In theory, leaving base_size to top_size_new unallocated would be
169        # correct, but in practice, if we zero out anything, we zero out
170        # everything up to top_size_new.
171        iotests.qemu_img_log('resize', '-f', iotests.imgfmt,
172                             '--preallocation', prealloc, top, top_size_new)
173        iotests.qemu_io_log('-c', 'read -P 0 %s 64k' % off, top)
174        iotests.qemu_io_log('-c', 'map', top)
175        iotests.qemu_img_log('map', '--output=json', top)
176