tests/qemu-iotests/255

   1 #!/usr/bin/env python
   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 def blockdev_create(vm, options):
  29     result = vm.qmp_log('blockdev-create',
  30                         filters=[iotests.filter_qmp_testfiles],
  31                         job_id='job0', options=options)
  32
  33     if 'return' in result:
  34         assert result['return'] == {}
  35         vm.run_job('job0')
  36     iotests.log("")
  37
  38 iotests.log('Finishing a commit job with background reads')
  39 iotests.log('============================================')
  40 iotests.log('')
  41
  42 with iotests.FilePath('t.qcow2') as disk_path, \
  43      iotests.FilePath('t.qcow2.mid') as mid_path, \
  44      iotests.FilePath('t.qcow2.base') as base_path, \
  45      iotests.VM() as vm:
  46
  47     iotests.log("=== Create backing chain and start VM ===")
  48     iotests.log("")
  49
  50     size = 128 * 1024 * 1024
  51     size_str = str(size)
  52
  53     iotests.create_image(base_path, size)
  54     iotests.qemu_img_log('create', '-f', iotests.imgfmt, mid_path, size_str)
  55     iotests.qemu_img_log('create', '-f', iotests.imgfmt, disk_path, size_str)
  56
  57     # Create a backing chain like this:
  58     # base <- [throttled: bps-read=4096] <- mid <- overlay
  59
  60     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
  61     vm.add_blockdev('file,filename=%s,node-name=base' % (base_path))
  62     vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled')
  63     vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path))
  64     vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled')
  65     vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path))
  66
  67     vm.launch()
  68
  69     iotests.log("=== Start background read requests ===")
  70     iotests.log("")
  71
  72     def start_requests():
  73         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  74         vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
  75
  76     start_requests()
  77
  78     iotests.log("=== Run a commit job ===")
  79     iotests.log("")
  80
  81     result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False,
  82                         device='overlay', top_node='mid')
  83
  84     vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests,
  85                 auto_dismiss=True)
  86
  87     vm.shutdown()
  88
  89 iotests.log('')
  90 iotests.log('Closing the VM while a job is being cancelled')
  91 iotests.log('=============================================')
  92 iotests.log('')
  93
  94 with iotests.FilePath('src.qcow2') as src_path, \
  95      iotests.FilePath('dst.qcow2') as dst_path, \
  96      iotests.VM() as vm:
  97
  98     iotests.log('=== Create images and start VM ===')
  99     iotests.log('')
 100
 101     size = 128 * 1024 * 1024
 102     size_str = str(size)
 103
 104     iotests.qemu_img_log('create', '-f', iotests.imgfmt, src_path, size_str)
 105     iotests.qemu_img_log('create', '-f', iotests.imgfmt, dst_path, size_str)
 106
 107     iotests.log(iotests.qemu_io('-f', iotests.imgfmt, '-c', 'write 0 1M',
 108                                 src_path),
 109                 filters=[iotests.filter_test_dir, iotests.filter_qemu_io])
 110
 111     vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
 112
 113     vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path))
 114     vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt))
 115
 116     vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path))
 117     vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt))
 118
 119     vm.add_blockdev('throttle,node-name=src-throttled,' +
 120                     'throttle-group=throttle0,file=src')
 121
 122     vm.add_device('virtio-blk,drive=src-throttled')
 123
 124     vm.launch()
 125
 126     iotests.log('=== Start a mirror job ===')
 127     iotests.log('')
 128
 129     vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled',
 130                                   target='dst', sync='full')
 131
 132     vm.qmp_log('block-job-cancel', device='job0')
 133     vm.qmp_log('quit')
 134
 135     vm.shutdown(has_quit=True)