tests/qemu-iotests/303

   1 #!/usr/bin/env python3
   2 # group: rw quick
   3 #
   4 # Test for dumping of qcow2 image metadata
   5 #
   6 # Copyright (c) 2020 Virtuozzo International GmbH
   7 #
   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.
  12 #
  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.
  17 #
  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/>.
  20 #
  21
  22 import iotests
  23 import subprocess
  24 from iotests import qemu_img_create, qemu_io, file_path, log, filter_qemu_io, \
  25         verify_qcow2_zstd_compression
  26
  27 iotests.script_initialize(supported_fmts=['qcow2'],
  28                           unsupported_imgopts=['refcount_bits', 'compat'])
  29 verify_qcow2_zstd_compression()
  30
  31 disk = file_path('disk')
  32 chunk = 1024 * 1024
  33
  34
  35 def create_bitmap(bitmap_number, disabled):
  36     granularity = 1 << (14 + bitmap_number)
  37     bitmap_name = 'bitmap-' + str(bitmap_number)
  38     args = ['bitmap', '--add', '-g', f'{granularity}', '-f', iotests.imgfmt,
  39             disk, bitmap_name]
  40     if disabled:
  41         args.append('--disable')
  42
  43     iotests.qemu_img(*args)
  44
  45
  46 def write_to_disk(offset, size):
  47     write = f'write {offset} {size}'
  48     log(qemu_io('-c', write, disk), filters=[filter_qemu_io])
  49
  50
  51 def add_bitmap(num, begin, end, disabled):
  52     log(f'Add bitmap {num}')
  53     create_bitmap(num, disabled)
  54     for i in range(begin, end):
  55         write_to_disk((i) * chunk, chunk)
  56     log('')
  57
  58
  59 def test(compression_type: str, json_output: bool) -> None:
  60     qemu_img_create('-f', iotests.imgfmt,
  61                     '-o', f'compression_type={compression_type}',
  62                     disk, '10M')
  63     add_bitmap(1, 0, 6, False)
  64     add_bitmap(2, 6, 8, True)
  65
  66     cmd = ['./qcow2.py', disk, 'dump-header']
  67     if json_output:
  68         cmd.append('-j')
  69
  70     subprocess.run(cmd)
  71
  72
  73 test('zlib', False)
  74 test('zstd', True)