tests/qemu-iotests/264

   1 #!/usr/bin/env python
   2 #
   3 # Test nbd reconnect
   4 #
   5 # Copyright (c) 2019 Virtuozzo International GmbH.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 import time
  22
  23 import iotests
  24 from iotests import qemu_img_create, qemu_io_silent_check, file_path, \
  25         qemu_nbd_popen, log
  26
  27 iotests.verify_image_format(supported_fmts=['qcow2'])
  28
  29 disk_a, disk_b, nbd_sock = file_path('disk_a', 'disk_b', 'nbd-sock')
  30 nbd_uri = 'nbd+unix:///?socket=' + nbd_sock
  31 size = 5 * 1024 * 1024
  32 wait_limit = 3
  33 wait_step = 0.2
  34
  35 qemu_img_create('-f', iotests.imgfmt, disk_a, str(size))
  36 qemu_img_create('-f', iotests.imgfmt, disk_b, str(size))
  37 srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
  38
  39 # Wait for NBD server availability
  40 t = 0
  41 ok = False
  42 while t < wait_limit:
  43     ok = qemu_io_silent_check('-f', 'raw', '-c', 'read 0 512', nbd_uri)
  44     if ok:
  45         break
  46     time.sleep(wait_step)
  47     t += wait_step
  48
  49 assert ok
  50
  51 vm = iotests.VM().add_drive(disk_a)
  52 vm.launch()
  53 vm.hmp_qemu_io('drive0', 'write 0 {}'.format(size))
  54
  55 vm.qmp_log('blockdev-add', filters=[iotests.filter_qmp_testfiles],
  56            **{'node_name': 'backup0',
  57               'driver': 'raw',
  58               'file': {'driver': 'nbd',
  59                        'server': {'type': 'unix', 'path': nbd_sock},
  60                        'reconnect-delay': 10}})
  61 vm.qmp_log('blockdev-backup', device='drive0', sync='full', target='backup0',
  62            speed=(1 * 1024 * 1024))
  63
  64 # Wait for some progress
  65 t = 0
  66 while t < wait_limit:
  67     jobs = vm.qmp('query-block-jobs')['return']
  68     if jobs and jobs[0]['offset'] > 0:
  69         break
  70     time.sleep(wait_step)
  71     t += wait_step
  72
  73 if jobs and jobs[0]['offset'] > 0:
  74     log('Backup job is started')
  75
  76 log('Kill NBD server')
  77 srv.kill()
  78 srv.wait()
  79
  80 jobs = vm.qmp('query-block-jobs')['return']
  81 if jobs and jobs[0]['offset'] < jobs[0]['len']:
  82     log('Backup job is still in progress')
  83
  84 vm.qmp_log('block-job-set-speed', device='drive0', speed=0)
  85
  86 # Emulate server down time for 1 second
  87 time.sleep(1)
  88
  89 log('Start NBD server')
  90 srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
  91
  92 e = vm.event_wait('BLOCK_JOB_COMPLETED')
  93 log('Backup completed: {}'.format(e['data']['offset']))
  94
  95 vm.qmp_log('blockdev-del', node_name='backup0')
  96 srv.kill()
  97 vm.shutdown()