tests/qemu-iotests/255

   1 #!/usr/bin/env python3
   2 # group: rw quick
   3 #
   4 # Test commit job graph modifications while requests are active
   5 #
   6 # Copyright (C) 2019 Red Hat, Inc.
   7 #
   8 # Creator/Owner: Kevin Wolf <kwolf@redhat.com>
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 2 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 #
  23
  24 import iotests
  25 from iotests import imgfmt
  26
  27 iotests.script_initialize(supported_fmts=['qcow2'])
  28
  29 iotests.log('Finishing a commit job with background reads')
  30 iotests.log('============================================')
  31 iotests.log('')
  32
  33 with iotests.FilePath('t.qcow2') as disk_path, \
  34      iotests.FilePath('t.qcow2.mid') as mid_path, \
  35      iotests.FilePath('t.qcow2.base') as base_path, \
  36      iotests.VM() as vm:
  37
  38     iotests.log("=== Create backing chain and start VM ===")
  39     iotests.log("")
  40
  41     size = 128 * 1024 * 1024
  42     size_str = str(size)
  43
  44     iotests.create_image(base_path, size)
  45     iotests.qemu_img_create('-f', iotests.imgfmt, mid_path, size_str)
  46     iotests.qemu_img_create('-f', iotests.imgfmt, disk_path, size_str)
  47
  48     # Create a backing chain like this:
  49     # base <- [throttled: bps-read=4096] <- mid <- overlay
  50
  51     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
  52     vm.add_blockdev('file,filename=%s,node-name=base' % (base_path))
  53     vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled')
  54     vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path))
  55     vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled')
  56     vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path))
  57
  58     vm.launch()
  59
  60     iotests.log("=== Start background read requests ===")
  61     iotests.log("")
  62
  63     def start_requests():
  64         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  65         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  66
  67     start_requests()
  68
  69     iotests.log("=== Run a commit job ===")
  70     iotests.log("")
  71
  72     result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False,
  73                         device='overlay', top_node='mid')
  74
  75     vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests,
  76                 auto_dismiss=True)
  77
  78     vm.shutdown()
  79
  80 iotests.log('')
  81 iotests.log('Closing the VM while a job is being cancelled')
  82 iotests.log('=============================================')
  83 iotests.log('')
  84
  85 with iotests.FilePath('src.qcow2') as src_path, \
  86      iotests.FilePath('dst.qcow2') as dst_path, \
  87      iotests.VM() as vm:
  88
  89     iotests.log('=== Create images and start VM ===')
  90     iotests.log('')
  91
  92     size = 128 * 1024 * 1024
  93     size_str = str(size)
  94
  95     iotests.qemu_img_create('-f', iotests.imgfmt, src_path, size_str)
  96     iotests.qemu_img_create('-f', iotests.imgfmt, dst_path, size_str)
  97
  98     iotests.qemu_io_log('-f', iotests.imgfmt, '-c', 'write 0 1M', src_path),
  99
 100     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
 101
 102     vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path))
 103     vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt))
 104
 105     vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path))
 106     vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt))
 107
 108     vm.add_blockdev('throttle,node-name=src-throttled,' +
 109                     'throttle-group=throttle0,file=src')
 110
 111     vm.add_device('virtio-blk,drive=src-throttled')
 112
 113     vm.launch()
 114
 115     iotests.log('=== Start a mirror job ===')
 116     iotests.log('')
 117
 118     vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled',
 119                                   target='dst', sync='full')
 120
 121     vm.qmp_log('block-job-cancel', device='job0')
 122     vm.qmp_log('quit')
 123
 124     vm.shutdown()