xref: /qemu/tests/qemu-iotests/147 (revision 5db05230) 
1#!/usr/bin/env python3
2# group: img
3#
4# Test case for NBD's blockdev-add interface
5#
6# Copyright (C) 2016 Red Hat, Inc.
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 random
24import socket
25import stat
26import time
27import iotests
28from iotests import cachemode, aiomode, imgfmt, qemu_img, qemu_nbd, qemu_nbd_early_pipe
29
30NBD_PORT_START      = 32768
31NBD_PORT_END        = NBD_PORT_START + 1024
32NBD_IPV6_PORT_START = NBD_PORT_END
33NBD_IPV6_PORT_END   = NBD_IPV6_PORT_START + 1024
34
35test_img = os.path.join(iotests.test_dir, 'test.img')
36unix_socket = os.path.join(iotests.sock_dir, 'nbd.socket')
37
38
39def flatten_sock_addr(crumpled_address):
40    result = { 'type': crumpled_address['type'] }
41    result.update(crumpled_address['data'])
42    return result
43
44
45class NBDBlockdevAddBase(iotests.QMPTestCase):
46    def blockdev_add_options(self, address, export, node_name):
47        options = { 'node-name': node_name,
48                    'driver': 'raw',
49                    'file': {
50                        'driver': 'nbd',
51                        'read-only': True,
52                        'server': address
53                    } }
54        if export is not None:
55            options['file']['export'] = export
56        return options
57
58    def client_test(self, filename, address, export=None,
59                    node_name='nbd-blockdev', delete=True):
60        bao = self.blockdev_add_options(address, export, node_name)
61        self.vm.cmd('blockdev-add', bao)
62
63        found = False
64        result = self.vm.qmp('query-named-block-nodes')
65        for node in result['return']:
66            if node['node-name'] == node_name:
67                found = True
68                if isinstance(filename, str):
69                    self.assert_qmp(node, 'image/filename', filename)
70                else:
71                    self.assert_json_filename_equal(node['image']['filename'],
72                                                    filename)
73                break
74        self.assertTrue(found)
75
76        if delete:
77            self.vm.cmd('blockdev-del', node_name=node_name)
78
79
80class QemuNBD(NBDBlockdevAddBase):
81    def setUp(self):
82        qemu_img('create', '-f', iotests.imgfmt, test_img, '64k')
83        self.vm = iotests.VM()
84        self.vm.launch()
85
86    def tearDown(self):
87        self.vm.shutdown()
88        os.remove(test_img)
89        try:
90            os.remove(unix_socket)
91        except OSError:
92            pass
93
94    def _try_server_up(self, *args):
95        status, msg = qemu_nbd_early_pipe('-f', imgfmt, test_img, *args)
96        if status == 0:
97            return True
98        if 'Address already in use' in msg:
99            return False
100        self.fail(msg)
101
102    def _server_up(self, *args):
103        self.assertTrue(self._try_server_up(*args))
104
105    def test_inet(self):
106        while True:
107            nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
108            if self._try_server_up('-b', 'localhost', '-p', str(nbd_port)):
109                break
110
111        address = { 'type': 'inet',
112                    'data': {
113                        'host': 'localhost',
114                        'port': str(nbd_port)
115                    } }
116        self.client_test('nbd://localhost:%i' % nbd_port,
117                         flatten_sock_addr(address))
118
119    def test_unix(self):
120        self._server_up('-k', unix_socket)
121        address = { 'type': 'unix',
122                    'data': { 'path': unix_socket } }
123        self.client_test('nbd+unix://?socket=' + unix_socket,
124                         flatten_sock_addr(address))
125
126
127class BuiltinNBD(NBDBlockdevAddBase):
128    def setUp(self):
129        qemu_img('create', '-f', iotests.imgfmt, test_img, '64k')
130        self.vm = iotests.VM()
131        self.vm.launch()
132        self.server = iotests.VM('.server')
133        self.server.add_drive_raw('if=none,id=nbd-export,' +
134                                  'file=%s,' % test_img +
135                                  'format=%s,' % imgfmt +
136                                  'cache=%s,' % cachemode +
137                                  'aio=%s' % aiomode)
138        self.server.launch()
139
140    def tearDown(self):
141        self.vm.shutdown()
142        self.server.shutdown()
143        os.remove(test_img)
144        try:
145            os.remove(unix_socket)
146        except OSError:
147            pass
148
149    # Returns False on EADDRINUSE; fails an assertion on other errors.
150    # Returns True on success.
151    def _try_server_up(self, address, export_name=None, export_name2=None):
152        result = self.server.qmp('nbd-server-start', addr=address)
153        if 'error' in result and \
154           'Address already in use' in result['error']['desc']:
155            return False
156        self.assert_qmp(result, 'return', {})
157
158        if export_name is None:
159            self.server.cmd('nbd-server-add', device='nbd-export')
160        else:
161            self.server.cmd('nbd-server-add', device='nbd-export',
162                            name=export_name)
163
164        if export_name2 is not None:
165            self.server.cmd('nbd-server-add', device='nbd-export',
166                            name=export_name2)
167
168        return True
169
170    def _server_up(self, address, export_name=None, export_name2=None):
171        self.assertTrue(self._try_server_up(address, export_name, export_name2))
172
173    def _server_down(self):
174        self.server.cmd('nbd-server-stop')
175
176    def do_test_inet(self, export_name=None):
177        while True:
178            nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
179            address = { 'type': 'inet',
180                        'data': {
181                            'host': 'localhost',
182                            'port': str(nbd_port)
183                        } }
184            if self._try_server_up(address, export_name):
185                break
186
187        export_name = export_name or 'nbd-export'
188        self.client_test('nbd://localhost:%i/%s' % (nbd_port, export_name),
189                         flatten_sock_addr(address), export_name)
190        self._server_down()
191
192    def test_inet_default_export_name(self):
193        self.do_test_inet()
194
195    def test_inet_same_export_name(self):
196        self.do_test_inet('nbd-export')
197
198    def test_inet_different_export_name(self):
199        self.do_test_inet('shadow')
200
201    def test_inet_two_exports(self):
202        while True:
203            nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
204            address = { 'type': 'inet',
205                        'data': {
206                            'host': 'localhost',
207                            'port': str(nbd_port)
208                        } }
209            if self._try_server_up(address, 'exp1', 'exp2'):
210                break
211
212        self.client_test('nbd://localhost:%i/%s' % (nbd_port, 'exp1'),
213                         flatten_sock_addr(address), 'exp1', 'node1', False)
214        self.client_test('nbd://localhost:%i/%s' % (nbd_port, 'exp2'),
215                         flatten_sock_addr(address), 'exp2', 'node2', False)
216        self.vm.cmd('blockdev-del', node_name='node1')
217        self.vm.cmd('blockdev-del', node_name='node2')
218        self._server_down()
219
220    def test_inet6(self):
221        try:
222            socket.getaddrinfo("::0", "0", socket.AF_INET6,
223                               socket.SOCK_STREAM, socket.IPPROTO_TCP,
224                               socket.AI_ADDRCONFIG | socket.AI_CANONNAME)
225        except socket.gaierror:
226            # IPv6 not available, skip
227            return
228
229        while True:
230            nbd_port = random.randrange(NBD_IPV6_PORT_START, NBD_IPV6_PORT_END)
231            address = { 'type': 'inet',
232                        'data': {
233                            'host': '::1',
234                            'port': str(nbd_port),
235                            'ipv4': False,
236                            'ipv6': True
237                        } }
238            if self._try_server_up(address):
239                break
240
241        filename = { 'driver': 'raw',
242                     'file': {
243                         'driver': 'nbd',
244                         'export': 'nbd-export',
245                         'server': flatten_sock_addr(address)
246                     } }
247        self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
248        self._server_down()
249
250    def test_unix(self):
251        address = { 'type': 'unix',
252                    'data': { 'path': unix_socket } }
253        self._server_up(address)
254        self.client_test('nbd+unix:///nbd-export?socket=' + unix_socket,
255                         flatten_sock_addr(address), 'nbd-export')
256        self._server_down()
257
258    def test_fd(self):
259        self._server_up({ 'type': 'unix',
260                          'data': { 'path': unix_socket } })
261
262        sockfd = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
263        sockfd.connect(unix_socket)
264
265        result = self.vm.send_fd_scm(fd=sockfd.fileno())
266        self.assertEqual(result, 0, 'Failed to send socket FD')
267
268        self.vm.cmd('getfd', fdname='nbd-fifo')
269
270        address = { 'type': 'fd',
271                    'data': { 'str': 'nbd-fifo' } }
272        filename = { 'driver': 'raw',
273                     'file': {
274                         'driver': 'nbd',
275                         'export': 'nbd-export',
276                         'server': flatten_sock_addr(address)
277                     } }
278        self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
279
280        self._server_down()
281
282
283if __name__ == '__main__':
284    iotests.main(supported_fmts=['raw'],
285                 supported_protocols=['nbd'])
286