xref: /qemu/tests/qemu-iotests/264 (revision d2623129) 
1#!/usr/bin/env python3
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
21import time
22
23import iotests
24from iotests import qemu_img_create, qemu_io_silent_check, file_path, \
25        qemu_nbd_popen, log
26
27iotests.script_initialize(
28    supported_fmts=['qcow2'],
29)
30
31disk_a, disk_b, nbd_sock = file_path('disk_a', 'disk_b', 'nbd-sock')
32nbd_uri = 'nbd+unix:///?socket=' + nbd_sock
33size = 5 * 1024 * 1024
34wait_limit = 3
35wait_step = 0.2
36
37qemu_img_create('-f', iotests.imgfmt, disk_a, str(size))
38qemu_img_create('-f', iotests.imgfmt, disk_b, str(size))
39srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
40
41# Wait for NBD server availability
42t = 0
43ok = False
44while t < wait_limit:
45    ok = qemu_io_silent_check('-f', 'raw', '-c', 'read 0 512', nbd_uri)
46    if ok:
47        break
48    time.sleep(wait_step)
49    t += wait_step
50
51assert ok
52
53vm = iotests.VM().add_drive(disk_a)
54vm.launch()
55vm.hmp_qemu_io('drive0', 'write 0 {}'.format(size))
56
57vm.qmp_log('blockdev-add', filters=[iotests.filter_qmp_testfiles],
58           **{'node_name': 'backup0',
59              'driver': 'raw',
60              'file': {'driver': 'nbd',
61                       'server': {'type': 'unix', 'path': nbd_sock},
62                       'reconnect-delay': 10}})
63vm.qmp_log('blockdev-backup', device='drive0', sync='full', target='backup0',
64           speed=(1 * 1024 * 1024))
65
66# Wait for some progress
67t = 0
68while t < wait_limit:
69    jobs = vm.qmp('query-block-jobs')['return']
70    if jobs and jobs[0]['offset'] > 0:
71        break
72    time.sleep(wait_step)
73    t += wait_step
74
75if jobs and jobs[0]['offset'] > 0:
76    log('Backup job is started')
77
78log('Kill NBD server')
79srv.kill()
80srv.wait()
81
82jobs = vm.qmp('query-block-jobs')['return']
83if jobs and jobs[0]['offset'] < jobs[0]['len']:
84    log('Backup job is still in progress')
85
86vm.qmp_log('block-job-set-speed', device='drive0', speed=0)
87
88# Emulate server down time for 1 second
89time.sleep(1)
90
91log('Start NBD server')
92srv = qemu_nbd_popen('-k', nbd_sock, '-f', iotests.imgfmt, disk_b)
93
94e = vm.event_wait('BLOCK_JOB_COMPLETED')
95log('Backup completed: {}'.format(e['data']['offset']))
96
97vm.qmp_log('blockdev-del', node_name='backup0')
98srv.kill()
99vm.shutdown()
100