xref: /qemu/tests/qemu-iotests/277 (revision abff1abf) 
1#!/usr/bin/env python3
2#
3# Test NBD client reconnection
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 os
22import subprocess
23import iotests
24from iotests import file_path, log
25
26iotests.script_initialize()
27
28
29nbd_sock, conf_file = file_path('nbd-sock', 'nbd-fault-injector.conf')
30
31
32def make_conf_file(event):
33    """
34    Create configuration file for the nbd-fault-injector.py
35
36    :param event: which event the server should close a connection on
37    """
38    with open(conf_file, 'w') as conff:
39        conff.write('[inject-error]\nevent={}\nwhen=after'.format(event))
40
41
42def start_server_NBD(event):
43    make_conf_file(event)
44
45    srv = subprocess.Popen(['nbd-fault-injector.py', '--classic-negotiation',
46                           nbd_sock, conf_file], stdout=subprocess.PIPE,
47                           stderr=subprocess.STDOUT, universal_newlines=True)
48    line = srv.stdout.readline()
49    if 'Listening on ' in line:
50        log('NBD server: started')
51    else:
52        log('NBD server: ' + line.rstrip())
53
54    return srv
55
56
57def start_client_NBD():
58    log('NBD client: QEMU-IO write')
59    args = iotests.qemu_io_args_no_fmt + \
60        ['-c', 'write -P 0x7 0 3M', '--image-opts',
61         'driver=nbd,server.type=unix,server.path={},'
62         'reconnect-delay=7'.format(nbd_sock)]
63    clt = subprocess.Popen(args, stdout=subprocess.PIPE,
64                           stderr=subprocess.STDOUT,
65                           universal_newlines=True)
66    return clt
67
68
69def check_proc_NBD(proc, connector):
70    try:
71        outs, errs = proc.communicate(timeout=10)
72
73        if proc.returncode < 0:
74            log('NBD {}: EXIT SIGNAL {}\n'.format(connector, proc.returncode))
75            log(outs)
76        else:
77            msg = outs.split('\n', 1)
78            log('NBD {}: {}'.format(connector, msg[0]))
79
80    except subprocess.TimeoutExpired:
81        proc.kill()
82        log('NBD {}: ERROR timeout expired'.format(connector))
83    finally:
84        if connector == 'server':
85            os.remove(nbd_sock)
86            os.remove(conf_file)
87
88
89srv = start_server_NBD('data')
90clt = start_client_NBD()
91# The server should close the connection after a client write request
92check_proc_NBD(srv, 'server')
93# Start the NBD server again
94srv = start_server_NBD('reply')
95# The client should reconnect and complete the write operation
96check_proc_NBD(clt, 'client')
97# Make it sure that server terminated
98check_proc_NBD(srv, 'server')
99