tests/qemu-iotests/310

   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
  23 import iotests
  24 from iotests import log, qemu_img, qemu_io
  25
  26 # Need backing file support
  27 iotests.script_initialize(supported_fmts=['qcow2'],
  28                           supported_platforms=['linux'])
  29
  30 log('')
  31 log('=== Copy-on-read across nodes ===')
  32 log('')
  33
  34 # This test is similar to the 216 one by Hanna Reitz <hreitz@redhat.com>
  35 # The difference is that this test case involves a bottom node to the
  36 # COR filter driver.
  37
  38 with 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     qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
  47     qemu_io(base_img_path, '-c', 'write -P 1 0M 1M')
  48     qemu_io(base_img_path, '-c', 'write -P 1 3M 1M')
  49     qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
  50              '-F', iotests.imgfmt, mid_img_path)
  51     qemu_io(mid_img_path, '-c', 'write -P 3 2M 1M')
  52     qemu_io(mid_img_path, '-c', 'write -P 3 4M 1M')
  53     qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
  54              '-F', iotests.imgfmt, top_img_path)
  55     qemu_io(top_img_path, '-c', 'write -P 2 1M 1M')
  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     qemu_img('rebase', '-u', '-b', '', '-f', iotests.imgfmt, top_img_path)
 109
 110     qemu_io(top_img_path, '-c', 'read -P 0 0 1M')
 111     qemu_io(top_img_path, '-c', 'read -P 2 1M 1M')
 112     qemu_io(top_img_path, '-c', 'read -P 3 2M 1M')
 113     qemu_io(top_img_path, '-c', 'read -P 0 3M 1M')
 114     qemu_io(top_img_path, '-c', 'read -P 3 4M 1M')
 115
 116     log('Done')