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 26iotests.script_initialize(supported_fmts=['qcow2']) 27 28disk = file_path('disk') 29chunk = 1024 * 1024 30 31 32def create_bitmap(bitmap_number, disabled): 33 granularity = 1 << (14 + bitmap_number) 34 bitmap_name = 'bitmap-' + str(bitmap_number) 35 args = ['bitmap', '--add', '-g', f'{granularity}', '-f', iotests.imgfmt, 36 disk, bitmap_name] 37 if disabled: 38 args.append('--disable') 39 40 iotests.qemu_img_pipe(*args) 41 42 43def write_to_disk(offset, size): 44 write = f'write {offset} {size}' 45 log(qemu_io('-c', write, disk), filters=[filter_qemu_io]) 46 47 48def add_bitmap(num, begin, end, disabled): 49 log(f'Add bitmap {num}') 50 create_bitmap(num, disabled) 51 for i in range(begin, end): 52 write_to_disk((i) * chunk, chunk) 53 log('') 54 55 56qemu_img_create('-f', iotests.imgfmt, disk, '10M') 57 58add_bitmap(1, 0, 6, False) 59add_bitmap(2, 6, 8, True) 60dump = ['./qcow2.py', disk, 'dump-header'] 61subprocess.run(dump) 62# Dump the metadata in JSON format 63dump.append('-j') 64subprocess.run(dump) 65