xref: /qemu/tests/qemu-iotests/255 (revision abff1abf) 
1#!/usr/bin/env python3
2#
3# Test commit job graph modifications while requests are active
4#
5# Copyright (C) 2019 Red Hat, Inc.
6#
7# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
8#
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation; either version 2 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program.  If not, see <http://www.gnu.org/licenses/>.
21#
22
23import iotests
24from iotests import imgfmt
25
26iotests.script_initialize(supported_fmts=['qcow2'])
27
28iotests.log('Finishing a commit job with background reads')
29iotests.log('============================================')
30iotests.log('')
31
32with iotests.FilePath('t.qcow2') as disk_path, \
33     iotests.FilePath('t.qcow2.mid') as mid_path, \
34     iotests.FilePath('t.qcow2.base') as base_path, \
35     iotests.VM() as vm:
36
37    iotests.log("=== Create backing chain and start VM ===")
38    iotests.log("")
39
40    size = 128 * 1024 * 1024
41    size_str = str(size)
42
43    iotests.create_image(base_path, size)
44    iotests.qemu_img_log('create', '-f', iotests.imgfmt, mid_path, size_str)
45    iotests.qemu_img_log('create', '-f', iotests.imgfmt, disk_path, size_str)
46
47    # Create a backing chain like this:
48    # base <- [throttled: bps-read=4096] <- mid <- overlay
49
50    vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
51    vm.add_blockdev('file,filename=%s,node-name=base' % (base_path))
52    vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled')
53    vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path))
54    vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled')
55    vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path))
56
57    vm.launch()
58
59    iotests.log("=== Start background read requests ===")
60    iotests.log("")
61
62    def start_requests():
63        vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
64        vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
65
66    start_requests()
67
68    iotests.log("=== Run a commit job ===")
69    iotests.log("")
70
71    result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False,
72                        device='overlay', top_node='mid')
73
74    vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests,
75                auto_dismiss=True)
76
77    vm.shutdown()
78
79iotests.log('')
80iotests.log('Closing the VM while a job is being cancelled')
81iotests.log('=============================================')
82iotests.log('')
83
84with iotests.FilePath('src.qcow2') as src_path, \
85     iotests.FilePath('dst.qcow2') as dst_path, \
86     iotests.VM() as vm:
87
88    iotests.log('=== Create images and start VM ===')
89    iotests.log('')
90
91    size = 128 * 1024 * 1024
92    size_str = str(size)
93
94    iotests.qemu_img_log('create', '-f', iotests.imgfmt, src_path, size_str)
95    iotests.qemu_img_log('create', '-f', iotests.imgfmt, dst_path, size_str)
96
97    iotests.log(iotests.qemu_io('-f', iotests.imgfmt, '-c', 'write 0 1M',
98                                src_path),
99                filters=[iotests.filter_test_dir, iotests.filter_qemu_io])
100
101    vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
102
103    vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path))
104    vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt))
105
106    vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path))
107    vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt))
108
109    vm.add_blockdev('throttle,node-name=src-throttled,' +
110                    'throttle-group=throttle0,file=src')
111
112    vm.add_device('virtio-blk,drive=src-throttled')
113
114    vm.launch()
115
116    iotests.log('=== Start a mirror job ===')
117    iotests.log('')
118
119    vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled',
120                                  target='dst', sync='full')
121
122    vm.qmp_log('block-job-cancel', device='job0')
123    vm.qmp_log('quit')
124
125    vm.shutdown(has_quit=True)
126