3 # Test nbd reconnect on open
5 # Copyright (c) 2020 Virtuozzo International GmbH
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.
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.
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/>.
24 from iotests import qemu_img_create, file_path, qemu_io_popen, qemu_nbd, \
27 iotests.script_initialize(supported_fmts=['qcow2'])
29 disk = file_path('disk')
30 nbd_sock = file_path('nbd-sock', base_dir=iotests.sock_dir)
33 def create_args(open_timeout):
34 return ['--image-opts', '-c', 'read 0 1M',
35 f'driver=nbd,open-timeout={open_timeout},'
36 f'server.type=unix,server.path={nbd_sock}']
39 def check_fail_to_connect(open_timeout):
40 log(f'Check fail to connect with {open_timeout} seconds of timeout')
43 qemu_io_log(*create_args(open_timeout), check=False)
44 delta_t = time.time() - start_t
46 max_delta = open_timeout + 0.2
47 if open_timeout <= delta_t <= max_delta:
48 log(f'qemu_io finished in {open_timeout}..{max_delta} seconds, OK')
50 note = 'too early' if delta_t < open_timeout else 'too long'
51 log(f'qemu_io finished in {delta_t:.1f} seconds, {note}')
54 qemu_img_create('-f', iotests.imgfmt, disk, '1M')
56 # Start NBD client when NBD server is not yet running. It should not fail, but
57 # wait for 5 seconds for the server to be available.
58 client = qemu_io_popen(*create_args(5))
61 qemu_nbd('-k', nbd_sock, '-f', iotests.imgfmt, disk)
63 # client should succeed
64 log(client.communicate()[0], filters=[iotests.filter_qemu_io])
66 # Server was started without --persistent flag, so it should be off now. Let's
67 # check it and at the same time check that with open-timeout=0 client fails
69 check_fail_to_connect(0)
71 # Check that we will fail after non-zero timeout if server is still unavailable
72 check_fail_to_connect(1)