qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

310 (3767B)

      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')