xref: /qemu/tests/qemu-iotests/277 (revision 727385c4) 
1#!/usr/bin/env python3
2# group: rw quick
3#
4# Test NBD client reconnection
5#
6# Copyright (c) 2019 Virtuozzo International GmbH
7#
8# This program is free software; you can redistribute it and/or modify
9# it under the terms of the GNU General Public License as published by
10# the Free Software Foundation; either version 2 of the License, or
11# (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program.  If not, see <http://www.gnu.org/licenses/>.
20#
21
22import os
23import subprocess
24import iotests
25from iotests import file_path, log
26
27iotests.script_initialize()
28
29
30nbd_sock, conf_file = file_path('nbd-sock', 'nbd-fault-injector.conf')
31
32
33def make_conf_file(event):
34    """
35    Create configuration file for the nbd-fault-injector.py
36
37    :param event: which event the server should close a connection on
38    """
39    with open(conf_file, 'w') as conff:
40        conff.write('[inject-error]\nevent={}\nwhen=after'.format(event))
41
42
43def start_server_NBD(event):
44    make_conf_file(event)
45
46    srv = subprocess.Popen(['./nbd-fault-injector.py', '--classic-negotiation',
47                           nbd_sock, conf_file], stdout=subprocess.PIPE,
48                           stderr=subprocess.STDOUT, universal_newlines=True)
49    line = srv.stdout.readline()
50    if 'Listening on ' in line:
51        log('NBD server: started')
52    else:
53        log('NBD server: ' + line.rstrip())
54
55    return srv
56
57
58def start_client_NBD():
59    log('NBD client: QEMU-IO write')
60    args = iotests.qemu_io_args_no_fmt + \
61        ['-c', 'write -P 0x7 0 3M', '--image-opts',
62         'driver=nbd,server.type=unix,server.path={},'
63         'reconnect-delay=7'.format(nbd_sock)]
64    clt = subprocess.Popen(args, stdout=subprocess.PIPE,
65                           stderr=subprocess.STDOUT,
66                           universal_newlines=True)
67    return clt
68
69
70def check_proc_NBD(proc, connector):
71    try:
72        outs, errs = proc.communicate(timeout=10)
73
74        if proc.returncode < 0:
75            log('NBD {}: EXIT SIGNAL {}\n'.format(connector, proc.returncode))
76            log(outs)
77        else:
78            msg = outs.split('\n', 1)
79            log('NBD {}: {}'.format(connector, msg[0]))
80
81    except subprocess.TimeoutExpired:
82        proc.kill()
83        log('NBD {}: ERROR timeout expired'.format(connector))
84    finally:
85        if connector == 'server':
86            os.remove(nbd_sock)
87            os.remove(conf_file)
88
89
90srv = start_server_NBD('data')
91clt = start_client_NBD()
92# The server should close the connection after a client write request
93check_proc_NBD(srv, 'server')
94# Start the NBD server again
95srv = start_server_NBD('reply')
96# The client should reconnect and complete the write operation
97check_proc_NBD(clt, 'client')
98# Make it sure that server terminated
99check_proc_NBD(srv, 'server')
100