tests/qemu-iotests/147

   1 #!/usr/bin/env python3
   2 #
   3 # Test case for NBD's blockdev-add interface
   4 #
   5 # Copyright (C) 2016 Red Hat, Inc.
   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
  21 import os
  22 import random
  23 import socket
  24 import stat
  25 import time
  26 import iotests
  27 from iotests import cachemode, aiomode, imgfmt, qemu_img, qemu_nbd, qemu_nbd_early_pipe
  28
  29 NBD_PORT_START      = 32768
  30 NBD_PORT_END        = NBD_PORT_START + 1024
  31 NBD_IPV6_PORT_START = NBD_PORT_END
  32 NBD_IPV6_PORT_END   = NBD_IPV6_PORT_START + 1024
  33
  34 test_img = os.path.join(iotests.test_dir, 'test.img')
  35 unix_socket = os.path.join(iotests.sock_dir, 'nbd.socket')
  36
  37
  38 def flatten_sock_addr(crumpled_address):
  39     result = { 'type': crumpled_address['type'] }
  40     result.update(crumpled_address['data'])
  41     return result
  42
  43
  44 class NBDBlockdevAddBase(iotests.QMPTestCase):
  45     def blockdev_add_options(self, address, export, node_name):
  46         options = { 'node-name': node_name,
  47                     'driver': 'raw',
  48                     'file': {
  49                         'driver': 'nbd',
  50                         'read-only': True,
  51                         'server': address
  52                     } }
  53         if export is not None:
  54             options['file']['export'] = export
  55         return options
  56
  57     def client_test(self, filename, address, export=None,
  58                     node_name='nbd-blockdev', delete=True):
  59         bao = self.blockdev_add_options(address, export, node_name)
  60         result = self.vm.qmp('blockdev-add', **bao)
  61         self.assert_qmp(result, 'return', {})
  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             result = self.vm.qmp('blockdev-del', node_name=node_name)
  78             self.assert_qmp(result, 'return', {})
  79
  80
  81 class QemuNBD(NBDBlockdevAddBase):
  82     def setUp(self):
  83         qemu_img('create', '-f', iotests.imgfmt, test_img, '64k')
  84         self.vm = iotests.VM()
  85         self.vm.launch()
  86
  87     def tearDown(self):
  88         self.vm.shutdown()
  89         os.remove(test_img)
  90         try:
  91             os.remove(unix_socket)
  92         except OSError:
  93             pass
  94
  95     def _try_server_up(self, *args):
  96         status, msg = qemu_nbd_early_pipe('-f', imgfmt, test_img, *args)
  97         if status == 0:
  98             return True
  99         if 'Address already in use' in msg:
 100             return False
 101         self.fail(msg)
 102
 103     def _server_up(self, *args):
 104         self.assertTrue(self._try_server_up(*args))
 105
 106     def test_inet(self):
 107         while True:
 108             nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
 109             if self._try_server_up('-b', 'localhost', '-p', str(nbd_port)):
 110                 break
 111
 112         address = { 'type': 'inet',
 113                     'data': {
 114                         'host': 'localhost',
 115                         'port': str(nbd_port)
 116                     } }
 117         self.client_test('nbd://localhost:%i' % nbd_port,
 118                          flatten_sock_addr(address))
 119
 120     def test_unix(self):
 121         self._server_up('-k', unix_socket)
 122         address = { 'type': 'unix',
 123                     'data': { 'path': unix_socket } }
 124         self.client_test('nbd+unix://?socket=' + unix_socket,
 125                          flatten_sock_addr(address))
 126
 127
 128 class BuiltinNBD(NBDBlockdevAddBase):
 129     def setUp(self):
 130         qemu_img('create', '-f', iotests.imgfmt, test_img, '64k')
 131         self.vm = iotests.VM()
 132         self.vm.launch()
 133         self.server = iotests.VM('.server')
 134         self.server.add_drive_raw('if=none,id=nbd-export,' +
 135                                   'file=%s,' % test_img +
 136                                   'format=%s,' % imgfmt +
 137                                   'cache=%s' % cachemode +
 138                                   'aio=%s' % aiomode)
 139         self.server.launch()
 140
 141     def tearDown(self):
 142         self.vm.shutdown()
 143         self.server.shutdown()
 144         os.remove(test_img)
 145         try:
 146             os.remove(unix_socket)
 147         except OSError:
 148             pass
 149
 150     # Returns False on EADDRINUSE; fails an assertion on other errors.
 151     # Returns True on success.
 152     def _try_server_up(self, address, export_name=None, export_name2=None):
 153         result = self.server.qmp('nbd-server-start', addr=address)
 154         if 'error' in result and \
 155            'Address already in use' in result['error']['desc']:
 156             return False
 157         self.assert_qmp(result, 'return', {})
 158
 159         if export_name is None:
 160             result = self.server.qmp('nbd-server-add', device='nbd-export')
 161         else:
 162             result = self.server.qmp('nbd-server-add', device='nbd-export',
 163                                      name=export_name)
 164         self.assert_qmp(result, 'return', {})
 165
 166         if export_name2 is not None:
 167             result = self.server.qmp('nbd-server-add', device='nbd-export',
 168                                      name=export_name2)
 169             self.assert_qmp(result, 'return', {})
 170
 171         return True
 172
 173     def _server_up(self, address, export_name=None, export_name2=None):
 174         self.assertTrue(self._try_server_up(address, export_name, export_name2))
 175
 176     def _server_down(self):
 177         result = self.server.qmp('nbd-server-stop')
 178         self.assert_qmp(result, 'return', {})
 179
 180     def do_test_inet(self, export_name=None):
 181         while True:
 182             nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
 183             address = { 'type': 'inet',
 184                         'data': {
 185                             'host': 'localhost',
 186                             'port': str(nbd_port)
 187                         } }
 188             if self._try_server_up(address, export_name):
 189                 break
 190
 191         export_name = export_name or 'nbd-export'
 192         self.client_test('nbd://localhost:%i/%s' % (nbd_port, export_name),
 193                          flatten_sock_addr(address), export_name)
 194         self._server_down()
 195
 196     def test_inet_default_export_name(self):
 197         self.do_test_inet()
 198
 199     def test_inet_same_export_name(self):
 200         self.do_test_inet('nbd-export')
 201
 202     def test_inet_different_export_name(self):
 203         self.do_test_inet('shadow')
 204
 205     def test_inet_two_exports(self):
 206         while True:
 207             nbd_port = random.randrange(NBD_PORT_START, NBD_PORT_END)
 208             address = { 'type': 'inet',
 209                         'data': {
 210                             'host': 'localhost',
 211                             'port': str(nbd_port)
 212                         } }
 213             if self._try_server_up(address, 'exp1', 'exp2'):
 214                 break
 215
 216         self.client_test('nbd://localhost:%i/%s' % (nbd_port, 'exp1'),
 217                          flatten_sock_addr(address), 'exp1', 'node1', False)
 218         self.client_test('nbd://localhost:%i/%s' % (nbd_port, 'exp2'),
 219                          flatten_sock_addr(address), 'exp2', 'node2', False)
 220         result = self.vm.qmp('blockdev-del', node_name='node1')
 221         self.assert_qmp(result, 'return', {})
 222         result = self.vm.qmp('blockdev-del', node_name='node2')
 223         self.assert_qmp(result, 'return', {})
 224         self._server_down()
 225
 226     def test_inet6(self):
 227         try:
 228             socket.getaddrinfo("::0", "0", socket.AF_INET6,
 229                                socket.SOCK_STREAM, socket.IPPROTO_TCP,
 230                                socket.AI_ADDRCONFIG | socket.AI_CANONNAME)
 231         except socket.gaierror:
 232             # IPv6 not available, skip
 233             return
 234
 235         while True:
 236             nbd_port = random.randrange(NBD_IPV6_PORT_START, NBD_IPV6_PORT_END)
 237             address = { 'type': 'inet',
 238                         'data': {
 239                             'host': '::1',
 240                             'port': str(nbd_port),
 241                             'ipv4': False,
 242                             'ipv6': True
 243                         } }
 244             if self._try_server_up(address):
 245                 break
 246
 247         filename = { 'driver': 'raw',
 248                      'file': {
 249                          'driver': 'nbd',
 250                          'export': 'nbd-export',
 251                          'server': flatten_sock_addr(address)
 252                      } }
 253         self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
 254         self._server_down()
 255
 256     def test_unix(self):
 257         address = { 'type': 'unix',
 258                     'data': { 'path': unix_socket } }
 259         self._server_up(address)
 260         self.client_test('nbd+unix:///nbd-export?socket=' + unix_socket,
 261                          flatten_sock_addr(address), 'nbd-export')
 262         self._server_down()
 263
 264     def test_fd(self):
 265         self._server_up({ 'type': 'unix',
 266                           'data': { 'path': unix_socket } })
 267
 268         sockfd = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
 269         sockfd.connect(unix_socket)
 270
 271         result = self.vm.send_fd_scm(fd=sockfd.fileno())
 272         self.assertEqual(result, 0, 'Failed to send socket FD')
 273
 274         result = self.vm.qmp('getfd', fdname='nbd-fifo')
 275         self.assert_qmp(result, 'return', {})
 276
 277         address = { 'type': 'fd',
 278                     'data': { 'str': 'nbd-fifo' } }
 279         filename = { 'driver': 'raw',
 280                      'file': {
 281                          'driver': 'nbd',
 282                          'export': 'nbd-export',
 283                          'server': flatten_sock_addr(address)
 284                      } }
 285         self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
 286
 287         self._server_down()
 288
 289
 290 if __name__ == '__main__':
 291     iotests.main(supported_fmts=['raw'],
 292                  supported_protocols=['nbd'])