Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
[qemu/ar7.git] / tests / qemu-iotests / 242
bloba9b27668c2757711fc3f21db87d4cc5925eec12f
1 #!/usr/bin/env python3
2 # group: rw quick
4 # Test for qcow2 bitmap printed information
6 # Copyright (c) 2019 Virtuozzo International GmbH
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.
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.
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/>.
22 import iotests
23 import json
24 import struct
25 from iotests import qemu_img_create, qemu_io, qemu_img_pipe, \
26     file_path, img_info_log, log, filter_qemu_io
28 iotests.script_initialize(supported_fmts=['qcow2'],
29                           supported_protocols=['file'])
31 disk = file_path('disk')
32 chunk = 256 * 1024
33 bitmap_flag_unknown = 1 << 2
34 # flag_offset = 5*cluster_size + flag_offset_in_bitmap_directory_entry
35 flag_offset = 0x5000f
38 def print_bitmap(extra_args):
39     log('qemu-img info dump:\n')
40     img_info_log(disk, extra_args=extra_args)
41     result = json.loads(qemu_img_pipe('info', '--force-share',
42                                       '--output=json', disk))
43     if 'bitmaps' in result['format-specific']['data']:
44         bitmaps = result['format-specific']['data']['bitmaps']
45         log('The same bitmaps in JSON format:')
46         log(bitmaps, indent=2)
47     else:
48         log('No bitmap in JSON format output')
51 def add_bitmap(bitmap_number, persistent, disabled):
52     granularity = 1 << (13 + bitmap_number)
53     bitmap_name = 'bitmap-' + str(bitmap_number-1)
54     vm = iotests.VM().add_drive(disk)
55     vm.launch()
56     vm.qmp_log('block-dirty-bitmap-add', node='drive0', name=bitmap_name,
57                granularity=granularity, persistent=persistent,
58                disabled=disabled)
59     vm.shutdown()
62 def write_to_disk(offset, size):
63     write = 'write {} {}'.format(offset, size)
64     log(qemu_io('-c', write, disk), filters=[filter_qemu_io])
67 def toggle_flag(offset):
68     with open(disk, "r+b") as f:
69         f.seek(offset, 0)
70         # Read one byte in a way compatible with Python 2
71         flags = struct.unpack("B", f.read(1))
72         toggled = flags[0] ^ bitmap_flag_unknown
73         f.seek(-1, 1)
74         f.write(struct.pack("B", toggled))
77 qemu_img_create('-f', iotests.imgfmt, disk, '1M')
79 for num in range(1, 4):
80     disabled = False
81     if num == 2:
82         disabled = True
83     log('Test {}'.format(num))
84     add_bitmap(num, num > 1, disabled)
85     write_to_disk((num-1) * chunk, chunk)
86     print_bitmap([])
87     log('')
89 vm = iotests.VM().add_drive(disk)
90 vm.launch()
91 num += 1
92 log('Test {}\nChecking "in-use" flag...'.format(num))
93 print_bitmap(['--force-share'])
94 vm.shutdown()
96 num += 1
97 log('\nTest {}'.format(num))
98 qemu_img_create('-f', iotests.imgfmt, disk, '1M')
99 add_bitmap(1, True, False)
100 log('Write an unknown bitmap flag \'{}\' into a new QCOW2 image at offset {}'
101     .format(hex(bitmap_flag_unknown), flag_offset))
102 toggle_flag(flag_offset)
103 img_info_log(disk)
104 toggle_flag(flag_offset)
105 log('Unset the unknown bitmap flag \'{}\' in the bitmap directory entry:\n'
106     .format(hex(bitmap_flag_unknown)))
107 img_info_log(disk)
108 log('Test complete')