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 22import iotests 23import subprocess 24from iotests import qemu_img_create, qemu_io, file_path, log, filter_qemu_io, \ 25 verify_qcow2_zstd_compression 26 27iotests.script_initialize(supported_fmts=['qcow2'], 28 unsupported_imgopts=['refcount_bits', 'compat']) 29verify_qcow2_zstd_compression() 30 31disk = file_path('disk') 32chunk = 1024 * 1024 33 34 35def 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 46def write_to_disk(offset, size): 47 write = f'write {offset} {size}' 48 log(qemu_io('-c', write, disk), filters=[filter_qemu_io]) 49 50 51def 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 59def 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 73test('zlib', False) 74test('zstd', True) 75