1#!/usr/bin/env python3 2# 3# Test for dumping of qcow2 image metadata 4# 5# Copyright (c) 2020 Virtuozzo International GmbH 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21import iotests 22import subprocess 23from iotests import qemu_img_create, qemu_io, file_path, log, filter_qemu_io 24 25iotests.script_initialize(supported_fmts=['qcow2']) 26 27disk = file_path('disk') 28chunk = 1024 * 1024 29 30 31def create_bitmap(bitmap_number, disabled): 32 granularity = 1 << (14 + bitmap_number) 33 bitmap_name = 'bitmap-' + str(bitmap_number) 34 args = ['bitmap', '--add', '-g', f'{granularity}', '-f', iotests.imgfmt, 35 disk, bitmap_name] 36 if disabled: 37 args.append('--disable') 38 39 iotests.qemu_img_pipe(*args) 40 41 42def write_to_disk(offset, size): 43 write = f'write {offset} {size}' 44 log(qemu_io('-c', write, disk), filters=[filter_qemu_io]) 45 46 47def add_bitmap(num, begin, end, disabled): 48 log(f'Add bitmap {num}') 49 create_bitmap(num, disabled) 50 for i in range(begin, end): 51 write_to_disk((i) * chunk, chunk) 52 log('') 53 54 55qemu_img_create('-f', iotests.imgfmt, disk, '10M') 56 57add_bitmap(1, 0, 6, False) 58add_bitmap(2, 6, 8, True) 59dump = ['qcow2.py', disk, 'dump-header'] 60subprocess.run(dump) 61# Dump the metadata in JSON format 62dump.append('-j') 63subprocess.run(dump) 64