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#!/usr/bin/env python
#
# Test nbd reconnect
#
# Copyright (c) 2019 Virtuozzo International GmbH.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import time
import iotests
from iotests import qemu_img_create, qemu_io_silent_check, file_path, \
qemu_nbd_popen, log
iotests.verify_image_format(supported_fmts=['qcow2'])
disk_a, disk_b, nbd_sock = file_path('disk_a', 'disk_b', 'nbd-sock')
nbd_uri = 'nbd+unix:///?socket=' + nbd_sock
size = 5 * 1024 * 1024
wait_limit = 3
wait_step = 0.2
qemu_img_create('-f', iotests.imgfmt, disk_a, str(size))
qemu_img_create('-f', iotests.imgfmt, disk_b, str(size))
srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
# Wait for NBD server availability
t = 0
ok = False
while t < wait_limit:
ok = qemu_io_silent_check('-f', 'raw', '-c', 'read 0 512', nbd_uri)
if ok:
break
time.sleep(wait_step)
t += wait_step
assert ok
vm = iotests.VM().add_drive(disk_a)
vm.launch()
vm.hmp_qemu_io('drive0', 'write 0 {}'.format(size))
vm.qmp_log('blockdev-add', filters=[iotests.filter_qmp_testfiles],
**{'node_name': 'backup0',
'driver': 'raw',
'file': {'driver': 'nbd',
'server': {'type': 'unix', 'path': nbd_sock},
'reconnect-delay': 10}})
vm.qmp_log('blockdev-backup', device='drive0', sync='full', target='backup0',
speed=(1 * 1024 * 1024))
# Wait for some progress
t = 0
while t < wait_limit:
jobs = vm.qmp('query-block-jobs')['return']
if jobs and jobs[0]['offset'] > 0:
break
time.sleep(wait_step)
t += wait_step
if jobs and jobs[0]['offset'] > 0:
log('Backup job is started')
log('Kill NBD server')
srv.kill()
srv.wait()
jobs = vm.qmp('query-block-jobs')['return']
if jobs and jobs[0]['offset'] < jobs[0]['len']:
log('Backup job is still in progress')
vm.qmp_log('block-job-set-speed', device='drive0', speed=0)
# Emulate server down time for 1 second
time.sleep(1)
log('Start NBD server')
srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
e = vm.event_wait('BLOCK_JOB_COMPLETED')
log('Backup completed: {}'.format(e['data']['offset']))
vm.qmp_log('blockdev-del', node_name='backup0')
srv.kill()
vm.shutdown()
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