1#!/usr/bin/env python3 2# 3# Copyright (C) 2019 Red Hat, Inc. 4# 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program. If not, see <http://www.gnu.org/licenses/>. 17# 18# Creator/Owner: Kevin Wolf <kwolf@redhat.com> 19# 20# Some tests for short backing files and short overlays 21 22import iotests 23 24iotests.script_initialize(supported_fmts=['qcow2'], 25 supported_platforms=['linux']) 26 27size_short = 1 * 1024 * 1024 28size_long = 2 * 1024 * 1024 29size_diff = size_long - size_short 30 31def create_chain() -> None: 32 iotests.qemu_img_log('create', '-f', iotests.imgfmt, base, 33 str(size_long)) 34 iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base, mid, 35 str(size_short)) 36 iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', mid, top, 37 str(size_long)) 38 39 iotests.qemu_io_log('-c', 'write -P 1 0 %d' % size_long, base) 40 41def create_vm() -> iotests.VM: 42 vm = iotests.VM() 43 vm.add_blockdev('file,filename=%s,node-name=base-file' % base) 44 vm.add_blockdev('%s,file=base-file,node-name=base' % iotests.imgfmt) 45 vm.add_blockdev('file,filename=%s,node-name=mid-file' % mid) 46 vm.add_blockdev('%s,file=mid-file,node-name=mid,backing=base' 47 % iotests.imgfmt) 48 vm.add_drive(top, 'backing=mid,node-name=top') 49 return vm 50 51with iotests.FilePath('base') as base, \ 52 iotests.FilePath('mid') as mid, \ 53 iotests.FilePath('top') as top: 54 55 iotests.log('== Commit tests ==') 56 57 create_chain() 58 59 iotests.log('=== Check visible data ===') 60 61 iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, top) 62 iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), top) 63 64 iotests.log('=== Checking allocation status ===') 65 66 iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, 67 '-c', 'alloc %d %d' % (size_short, size_diff), 68 base) 69 70 iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, 71 '-c', 'alloc %d %d' % (size_short, size_diff), 72 mid) 73 74 iotests.qemu_io_log('-c', 'alloc 0 %d' % size_short, 75 '-c', 'alloc %d %d' % (size_short, size_diff), 76 top) 77 78 iotests.log('=== Checking map ===') 79 80 iotests.qemu_img_log('map', '--output=json', base) 81 iotests.qemu_img_log('map', '--output=human', base) 82 iotests.qemu_img_log('map', '--output=json', mid) 83 iotests.qemu_img_log('map', '--output=human', mid) 84 iotests.qemu_img_log('map', '--output=json', top) 85 iotests.qemu_img_log('map', '--output=human', top) 86 87 iotests.log('=== Testing qemu-img commit (top -> mid) ===') 88 89 iotests.qemu_img_log('commit', top) 90 iotests.img_info_log(mid) 91 iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) 92 iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) 93 94 iotests.log('=== Testing HMP commit (top -> mid) ===') 95 96 create_chain() 97 with create_vm() as vm: 98 vm.launch() 99 vm.qmp_log('human-monitor-command', command_line='commit drive0') 100 101 iotests.img_info_log(mid) 102 iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) 103 iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) 104 105 iotests.log('=== Testing QMP active commit (top -> mid) ===') 106 107 create_chain() 108 with create_vm() as vm: 109 vm.launch() 110 vm.qmp_log('block-commit', device='top', base_node='mid', 111 job_id='job0', auto_dismiss=False) 112 vm.run_job('job0', wait=5) 113 114 iotests.img_info_log(mid) 115 iotests.qemu_io_log('-c', 'read -P 1 0 %d' % size_short, mid) 116 iotests.qemu_io_log('-c', 'read -P 0 %d %d' % (size_short, size_diff), mid) 117 118 119 iotests.log('== Resize tests ==') 120 121 # Use different sizes for different allocation modes: 122 # 123 # We want to have at least one test where 32 bit truncation in the size of 124 # the overlapping area becomes visible. This is covered by the 125 # prealloc='off' case (1G to 6G is an overlap of 5G). 126 # 127 # However, we can only do this for modes that don't preallocate data 128 # because otherwise we might run out of space on the test host. 129 # 130 # We also want to test some unaligned combinations. 131 for (prealloc, base_size, top_size_old, top_size_new, off) in [ 132 ('off', '6G', '1G', '8G', '5G'), 133 ('metadata', '32G', '30G', '33G', '31G'), 134 ('falloc', '10M', '5M', '15M', '9M'), 135 ('full', '16M', '8M', '12M', '11M'), 136 ('off', '384k', '253k', '512k', '253k'), 137 ('off', '400k', '256k', '512k', '336k'), 138 ('off', '512k', '256k', '500k', '436k')]: 139 140 iotests.log('=== preallocation=%s ===' % prealloc) 141 iotests.qemu_img_log('create', '-f', iotests.imgfmt, base, base_size) 142 iotests.qemu_img_log('create', '-f', iotests.imgfmt, '-b', base, top, 143 top_size_old) 144 iotests.qemu_io_log('-c', 'write -P 1 %s 64k' % off, base) 145 146 # After this, top_size_old to base_size should be allocated/zeroed. 147 # 148 # In theory, leaving base_size to top_size_new unallocated would be 149 # correct, but in practice, if we zero out anything, we zero out 150 # everything up to top_size_new. 151 iotests.qemu_img_log('resize', '-f', iotests.imgfmt, 152 '--preallocation', prealloc, top, top_size_new) 153 iotests.qemu_io_log('-c', 'read -P 0 %s 64k' % off, top) 154 iotests.qemu_io_log('-c', 'map', top) 155 iotests.qemu_img_log('map', '--output=json', top) 156