1#!/usr/bin/env python3 2# group: rw quick 3# 4# Copy-on-read tests using a COR filter with a bottom node 5# 6# Copyright (C) 2018 Red Hat, Inc. 7# Copyright (c) 2020 Virtuozzo International GmbH 8# 9# This program is free software; you can redistribute it and/or modify 10# it under the terms of the GNU General Public License as published by 11# the Free Software Foundation; either version 2 of the License, or 12# (at your option) any later version. 13# 14# This program is distributed in the hope that it will be useful, 15# but WITHOUT ANY WARRANTY; without even the implied warranty of 16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17# GNU General Public License for more details. 18# 19# You should have received a copy of the GNU General Public License 20# along with this program. If not, see <http://www.gnu.org/licenses/>. 21# 22 23import iotests 24from iotests import log, qemu_img, qemu_io_silent 25 26# Need backing file support 27iotests.script_initialize(supported_fmts=['qcow2'], 28 supported_platforms=['linux']) 29 30log('') 31log('=== Copy-on-read across nodes ===') 32log('') 33 34# This test is similar to the 216 one by Max Reitz <mreitz@redhat.com> 35# The difference is that this test case involves a bottom node to the 36# COR filter driver. 37 38with iotests.FilePath('base.img') as base_img_path, \ 39 iotests.FilePath('mid.img') as mid_img_path, \ 40 iotests.FilePath('top.img') as top_img_path, \ 41 iotests.VM() as vm: 42 43 log('--- Setting up images ---') 44 log('') 45 46 assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0 47 assert qemu_io_silent(base_img_path, '-c', 'write -P 1 0M 1M') == 0 48 assert qemu_io_silent(base_img_path, '-c', 'write -P 1 3M 1M') == 0 49 assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path, 50 '-F', iotests.imgfmt, mid_img_path) == 0 51 assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 2M 1M') == 0 52 assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 4M 1M') == 0 53 assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path, 54 '-F', iotests.imgfmt, top_img_path) == 0 55 assert qemu_io_silent(top_img_path, '-c', 'write -P 2 1M 1M') == 0 56 57# 0 1 2 3 4 58# top 2 59# mid 3 3 60# base 1 1 61 62 log('Done') 63 64 log('') 65 log('--- Doing COR ---') 66 log('') 67 68 vm.launch() 69 70 log(vm.qmp('blockdev-add', 71 node_name='node0', 72 driver='copy-on-read', 73 bottom='node2', 74 file={ 75 'driver': iotests.imgfmt, 76 'file': { 77 'driver': 'file', 78 'filename': top_img_path 79 }, 80 'backing': { 81 'node-name': 'node2', 82 'driver': iotests.imgfmt, 83 'file': { 84 'driver': 'file', 85 'filename': mid_img_path 86 }, 87 'backing': { 88 'driver': iotests.imgfmt, 89 'file': { 90 'driver': 'file', 91 'filename': base_img_path 92 } 93 }, 94 } 95 })) 96 97 # Trigger COR 98 log(vm.qmp('human-monitor-command', 99 command_line='qemu-io node0 "read 0 5M"')) 100 101 vm.shutdown() 102 103 log('') 104 log('--- Checking COR result ---') 105 log('') 106 107 # Detach backing to check that we can read the data from the top level now 108 assert qemu_img('rebase', '-u', '-b', '', '-f', iotests.imgfmt, 109 top_img_path) == 0 110 111 assert qemu_io_silent(top_img_path, '-c', 'read -P 0 0 1M') == 0 112 assert qemu_io_silent(top_img_path, '-c', 'read -P 2 1M 1M') == 0 113 assert qemu_io_silent(top_img_path, '-c', 'read -P 3 2M 1M') == 0 114 assert qemu_io_silent(top_img_path, '-c', 'read -P 0 3M 1M') == 0 115 assert qemu_io_silent(top_img_path, '-c', 'read -P 3 4M 1M') == 0 116 117 log('Done') 118