118 lines
4.0 KiB
Plaintext
118 lines
4.0 KiB
Plaintext
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#!/usr/bin/env python3
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# group: rw quick
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#
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# Copy-on-read tests using a COR filter with a bottom node
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#
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# Copyright (C) 2018 Red Hat, Inc.
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# Copyright (c) 2020 Virtuozzo International GmbH
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import iotests
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from iotests import log, qemu_img, qemu_io_silent
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# Need backing file support
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iotests.script_initialize(supported_fmts=['qcow2'],
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supported_platforms=['linux'])
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log('')
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log('=== Copy-on-read across nodes ===')
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log('')
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# This test is similar to the 216 one by Max Reitz <mreitz@redhat.com>
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# The difference is that this test case involves a bottom node to the
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# COR filter driver.
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with iotests.FilePath('base.img') as base_img_path, \
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iotests.FilePath('mid.img') as mid_img_path, \
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iotests.FilePath('top.img') as top_img_path, \
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iotests.VM() as vm:
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log('--- Setting up images ---')
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log('')
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assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
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assert qemu_io_silent(base_img_path, '-c', 'write -P 1 0M 1M') == 0
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assert qemu_io_silent(base_img_path, '-c', 'write -P 1 3M 1M') == 0
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assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
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'-F', iotests.imgfmt, mid_img_path) == 0
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assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 2M 1M') == 0
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assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 4M 1M') == 0
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assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
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'-F', iotests.imgfmt, top_img_path) == 0
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assert qemu_io_silent(top_img_path, '-c', 'write -P 2 1M 1M') == 0
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# 0 1 2 3 4
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# top 2
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# mid 3 3
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# base 1 1
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log('Done')
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log('')
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log('--- Doing COR ---')
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log('')
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vm.launch()
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log(vm.qmp('blockdev-add',
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node_name='node0',
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driver='copy-on-read',
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bottom='node2',
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file={
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': top_img_path
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},
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'backing': {
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'node-name': 'node2',
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': mid_img_path
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},
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'backing': {
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': base_img_path
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}
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},
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}
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}))
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# Trigger COR
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log(vm.qmp('human-monitor-command',
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command_line='qemu-io node0 "read 0 5M"'))
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vm.shutdown()
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log('')
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log('--- Checking COR result ---')
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log('')
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# Detach backing to check that we can read the data from the top level now
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assert qemu_img('rebase', '-u', '-b', '', '-f', iotests.imgfmt,
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top_img_path) == 0
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assert qemu_io_silent(top_img_path, '-c', 'read -P 0 0 1M') == 0
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assert qemu_io_silent(top_img_path, '-c', 'read -P 2 1M 1M') == 0
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assert qemu_io_silent(top_img_path, '-c', 'read -P 3 2M 1M') == 0
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assert qemu_io_silent(top_img_path, '-c', 'read -P 0 3M 1M') == 0
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assert qemu_io_silent(top_img_path, '-c', 'read -P 3 4M 1M') == 0
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log('Done')
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