tests/qemu-iotests/255

   1 #!/usr/bin/env python3
   2 #
   3 # Test commit job graph modifications while requests are active
   4 #
   5 # Copyright (C) 2019 Red Hat, Inc.
   6 #
   7 # Creator/Owner: Kevin Wolf <kwolf@redhat.com>
   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 imgfmt
  25
  26 iotests.verify_image_format(supported_fmts=['qcow2'])
  27
  28 iotests.log('Finishing a commit job with background reads')
  29 iotests.log('============================================')
  30 iotests.log('')
  31
  32 with iotests.FilePath('t.qcow2') as disk_path, \
  33      iotests.FilePath('t.qcow2.mid') as mid_path, \
  34      iotests.FilePath('t.qcow2.base') as base_path, \
  35      iotests.VM() as vm:
  36
  37     iotests.log("=== Create backing chain and start VM ===")
  38     iotests.log("")
  39
  40     size = 128 * 1024 * 1024
  41     size_str = str(size)
  42
  43     iotests.create_image(base_path, size)
  44     iotests.qemu_img_log('create', '-f', iotests.imgfmt, mid_path, size_str)
  45     iotests.qemu_img_log('create', '-f', iotests.imgfmt, disk_path, size_str)
  46
  47     # Create a backing chain like this:
  48     # base <- [throttled: bps-read=4096] <- mid <- overlay
  49
  50     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
  51     vm.add_blockdev('file,filename=%s,node-name=base' % (base_path))
  52     vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled')
  53     vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path))
  54     vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled')
  55     vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path))
  56
  57     vm.launch()
  58
  59     iotests.log("=== Start background read requests ===")
  60     iotests.log("")
  61
  62     def start_requests():
  63         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  64         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  65
  66     start_requests()
  67
  68     iotests.log("=== Run a commit job ===")
  69     iotests.log("")
  70
  71     result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False,
  72                         device='overlay', top_node='mid')
  73
  74     vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests,
  75                 auto_dismiss=True)
  76
  77     vm.shutdown()
  78
  79 iotests.log('')
  80 iotests.log('Closing the VM while a job is being cancelled')
  81 iotests.log('=============================================')
  82 iotests.log('')
  83
  84 with iotests.FilePath('src.qcow2') as src_path, \
  85      iotests.FilePath('dst.qcow2') as dst_path, \
  86      iotests.VM() as vm:
  87
  88     iotests.log('=== Create images and start VM ===')
  89     iotests.log('')
  90
  91     size = 128 * 1024 * 1024
  92     size_str = str(size)
  93
  94     iotests.qemu_img_log('create', '-f', iotests.imgfmt, src_path, size_str)
  95     iotests.qemu_img_log('create', '-f', iotests.imgfmt, dst_path, size_str)
  96
  97     iotests.log(iotests.qemu_io('-f', iotests.imgfmt, '-c', 'write 0 1M',
  98                                 src_path),
  99                 filters=[iotests.filter_test_dir, iotests.filter_qemu_io])
 100
 101     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
 102
 103     vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path))
 104     vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt))
 105
 106     vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path))
 107     vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt))
 108
 109     vm.add_blockdev('throttle,node-name=src-throttled,' +
 110                     'throttle-group=throttle0,file=src')
 111
 112     vm.add_device('virtio-blk,drive=src-throttled')
 113
 114     vm.launch()
 115
 116     iotests.log('=== Start a mirror job ===')
 117     iotests.log('')
 118
 119     vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled',
 120                                   target='dst', sync='full')
 121
 122     vm.qmp_log('block-job-cancel', device='job0')
 123     vm.qmp_log('quit')
 124
 125     vm.shutdown(has_quit=True)