tests/qemu-iotests/iotests.py

   1 # Common utilities and Python wrappers for qemu-iotests
   2 #
   3 # Copyright (C) 2012 IBM Corp.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19 import os
  20 import re
  21 import subprocess
  22 import string
  23 import unittest
  24 import sys
  25 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts'))
  26 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts', 'qmp'))
  27 import qmp
  28 import qtest
  29 import struct
  30
  31 __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
  32            'VM', 'QMPTestCase', 'notrun', 'main', 'verify_image_format',
  33            'verify_platform', 'filter_test_dir', 'filter_win32',
  34            'filter_qemu_io', 'filter_chown', 'log']
  35
  36 # This will not work if arguments contain spaces but is necessary if we
  37 # want to support the override options that ./check supports.
  38 qemu_img_args = [os.environ.get('QEMU_IMG_PROG', 'qemu-img')]
  39 if os.environ.get('QEMU_IMG_OPTIONS'):
  40     qemu_img_args += os.environ['QEMU_IMG_OPTIONS'].strip().split(' ')
  41
  42 qemu_io_args = [os.environ.get('QEMU_IO_PROG', 'qemu-io')]
  43 if os.environ.get('QEMU_IO_OPTIONS'):
  44     qemu_io_args += os.environ['QEMU_IO_OPTIONS'].strip().split(' ')
  45
  46 qemu_args = [os.environ.get('QEMU_PROG', 'qemu')]
  47 if os.environ.get('QEMU_OPTIONS'):
  48     qemu_args += os.environ['QEMU_OPTIONS'].strip().split(' ')
  49
  50 imgfmt = os.environ.get('IMGFMT', 'raw')
  51 imgproto = os.environ.get('IMGPROTO', 'file')
  52 test_dir = os.environ.get('TEST_DIR', '/var/tmp')
  53 output_dir = os.environ.get('OUTPUT_DIR', '.')
  54 cachemode = os.environ.get('CACHEMODE')
  55 qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE')
  56
  57 socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
  58
  59 def qemu_img(*args):
  60     '''Run qemu-img and return the exit code'''
  61     devnull = open('/dev/null', 'r+')
  62     exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
  63     if exitcode < 0:
  64         sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
  65     return exitcode
  66
  67 def qemu_img_verbose(*args):
  68     '''Run qemu-img without suppressing its output and return the exit code'''
  69     exitcode = subprocess.call(qemu_img_args + list(args))
  70     if exitcode < 0:
  71         sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
  72     return exitcode
  73
  74 def qemu_img_pipe(*args):
  75     '''Run qemu-img and return its output'''
  76     subp = subprocess.Popen(qemu_img_args + list(args),
  77                             stdout=subprocess.PIPE,
  78                             stderr=subprocess.STDOUT)
  79     exitcode = subp.wait()
  80     if exitcode < 0:
  81         sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
  82     return subp.communicate()[0]
  83
  84 def qemu_io(*args):
  85     '''Run qemu-io and return the stdout data'''
  86     args = qemu_io_args + list(args)
  87     subp = subprocess.Popen(args, stdout=subprocess.PIPE,
  88                             stderr=subprocess.STDOUT)
  89     exitcode = subp.wait()
  90     if exitcode < 0:
  91         sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
  92     return subp.communicate()[0]
  93
  94 def compare_images(img1, img2):
  95     '''Return True if two image files are identical'''
  96     return qemu_img('compare', '-f', imgfmt,
  97                     '-F', imgfmt, img1, img2) == 0
  98
  99 def create_image(name, size):
 100     '''Create a fully-allocated raw image with sector markers'''
 101     file = open(name, 'w')
 102     i = 0
 103     while i < size:
 104         sector = struct.pack('>l504xl', i / 512, i / 512)
 105         file.write(sector)
 106         i = i + 512
 107     file.close()
 108
 109 test_dir_re = re.compile(r"%s" % test_dir)
 110 def filter_test_dir(msg):
 111     return test_dir_re.sub("TEST_DIR", msg)
 112
 113 win32_re = re.compile(r"\r")
 114 def filter_win32(msg):
 115     return win32_re.sub("", msg)
 116
 117 qemu_io_re = re.compile(r"[0-9]* ops; [0-9\/:. sec]* \([0-9\/.inf]* [EPTGMKiBbytes]*\/sec and [0-9\/.inf]* ops\/sec\)")
 118 def filter_qemu_io(msg):
 119     msg = filter_win32(msg)
 120     return qemu_io_re.sub("X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)", msg)
 121
 122 chown_re = re.compile(r"chown [0-9]+:[0-9]+")
 123 def filter_chown(msg):
 124     return chown_re.sub("chown UID:GID", msg)
 125
 126 def log(msg, filters=[]):
 127     for flt in filters:
 128         msg = flt(msg)
 129     print msg
 130
 131 # Test if 'match' is a recursive subset of 'event'
 132 def event_match(event, match=None):
 133     if match is None:
 134         return True
 135
 136     for key in match:
 137         if key in event:
 138             if isinstance(event[key], dict):
 139                 if not event_match(event[key], match[key]):
 140                     return False
 141             elif event[key] != match[key]:
 142                 return False
 143         else:
 144             return False
 145
 146     return True
 147
 148 class VM(object):
 149     '''A QEMU VM'''
 150
 151     def __init__(self):
 152         self._monitor_path = os.path.join(test_dir, 'qemu-mon.%d' % os.getpid())
 153         self._qemu_log_path = os.path.join(test_dir, 'qemu-log.%d' % os.getpid())
 154         self._qtest_path = os.path.join(test_dir, 'qemu-qtest.%d' % os.getpid())
 155         self._args = qemu_args + ['-chardev',
 156                      'socket,id=mon,path=' + self._monitor_path,
 157                      '-mon', 'chardev=mon,mode=control',
 158                      '-qtest', 'unix:path=' + self._qtest_path,
 159                      '-machine', 'accel=qtest',
 160                      '-display', 'none', '-vga', 'none']
 161         self._num_drives = 0
 162         self._events = []
 163
 164     # This can be used to add an unused monitor instance.
 165     def add_monitor_telnet(self, ip, port):
 166         args = 'tcp:%s:%d,server,nowait,telnet' % (ip, port)
 167         self._args.append('-monitor')
 168         self._args.append(args)
 169
 170     def add_drive_raw(self, opts):
 171         self._args.append('-drive')
 172         self._args.append(opts)
 173         return self
 174
 175     def add_drive(self, path, opts='', interface='virtio'):
 176         '''Add a virtio-blk drive to the VM'''
 177         options = ['if=%s' % interface,
 178                    'id=drive%d' % self._num_drives]
 179
 180         if path is not None:
 181             options.append('file=%s' % path)
 182             options.append('format=%s' % imgfmt)
 183             options.append('cache=%s' % cachemode)
 184
 185         if opts:
 186             options.append(opts)
 187
 188         self._args.append('-drive')
 189         self._args.append(','.join(options))
 190         self._num_drives += 1
 191         return self
 192
 193     def pause_drive(self, drive, event=None):
 194         '''Pause drive r/w operations'''
 195         if not event:
 196             self.pause_drive(drive, "read_aio")
 197             self.pause_drive(drive, "write_aio")
 198             return
 199         self.qmp('human-monitor-command',
 200                     command_line='qemu-io %s "break %s bp_%s"' % (drive, event, drive))
 201
 202     def resume_drive(self, drive):
 203         self.qmp('human-monitor-command',
 204                     command_line='qemu-io %s "remove_break bp_%s"' % (drive, drive))
 205
 206     def hmp_qemu_io(self, drive, cmd):
 207         '''Write to a given drive using an HMP command'''
 208         return self.qmp('human-monitor-command',
 209                         command_line='qemu-io %s "%s"' % (drive, cmd))
 210
 211     def add_fd(self, fd, fdset, opaque, opts=''):
 212         '''Pass a file descriptor to the VM'''
 213         options = ['fd=%d' % fd,
 214                    'set=%d' % fdset,
 215                    'opaque=%s' % opaque]
 216         if opts:
 217             options.append(opts)
 218
 219         self._args.append('-add-fd')
 220         self._args.append(','.join(options))
 221         return self
 222
 223     def send_fd_scm(self, fd_file_path):
 224         # In iotest.py, the qmp should always use unix socket.
 225         assert self._qmp.is_scm_available()
 226         bin = socket_scm_helper
 227         if os.path.exists(bin) == False:
 228             print "Scm help program does not present, path '%s'." % bin
 229             return -1
 230         fd_param = ["%s" % bin,
 231                     "%d" % self._qmp.get_sock_fd(),
 232                     "%s" % fd_file_path]
 233         devnull = open('/dev/null', 'rb')
 234         p = subprocess.Popen(fd_param, stdin=devnull, stdout=sys.stdout,
 235                              stderr=sys.stderr)
 236         return p.wait()
 237
 238     def launch(self):
 239         '''Launch the VM and establish a QMP connection'''
 240         devnull = open('/dev/null', 'rb')
 241         qemulog = open(self._qemu_log_path, 'wb')
 242         try:
 243             self._qmp = qmp.QEMUMonitorProtocol(self._monitor_path, server=True)
 244             self._qtest = qtest.QEMUQtestProtocol(self._qtest_path, server=True)
 245             self._popen = subprocess.Popen(self._args, stdin=devnull, stdout=qemulog,
 246                                            stderr=subprocess.STDOUT)
 247             self._qmp.accept()
 248             self._qtest.accept()
 249         except:
 250             os.remove(self._monitor_path)
 251             raise
 252
 253     def shutdown(self):
 254         '''Terminate the VM and clean up'''
 255         if not self._popen is None:
 256             self._qmp.cmd('quit')
 257             exitcode = self._popen.wait()
 258             if exitcode < 0:
 259                 sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
 260             os.remove(self._monitor_path)
 261             os.remove(self._qtest_path)
 262             os.remove(self._qemu_log_path)
 263             self._popen = None
 264
 265     underscore_to_dash = string.maketrans('_', '-')
 266     def qmp(self, cmd, conv_keys=True, **args):
 267         '''Invoke a QMP command and return the result dict'''
 268         qmp_args = dict()
 269         for k in args.keys():
 270             if conv_keys:
 271                 qmp_args[k.translate(self.underscore_to_dash)] = args[k]
 272             else:
 273                 qmp_args[k] = args[k]
 274
 275         return self._qmp.cmd(cmd, args=qmp_args)
 276
 277     def qtest(self, cmd):
 278         '''Send a qtest command to guest'''
 279         return self._qtest.cmd(cmd)
 280
 281     def get_qmp_event(self, wait=False):
 282         '''Poll for one queued QMP events and return it'''
 283         if len(self._events) > 0:
 284             return self._events.pop(0)
 285         return self._qmp.pull_event(wait=wait)
 286
 287     def get_qmp_events(self, wait=False):
 288         '''Poll for queued QMP events and return a list of dicts'''
 289         events = self._qmp.get_events(wait=wait)
 290         events.extend(self._events)
 291         del self._events[:]
 292         self._qmp.clear_events()
 293         return events
 294
 295     def event_wait(self, name='BLOCK_JOB_COMPLETED', timeout=60.0, match=None):
 296         # Search cached events
 297         for event in self._events:
 298             if (event['event'] == name) and event_match(event, match):
 299                 self._events.remove(event)
 300                 return event
 301
 302         # Poll for new events
 303         while True:
 304             event = self._qmp.pull_event(wait=timeout)
 305             if (event['event'] == name) and event_match(event, match):
 306                 return event
 307             self._events.append(event)
 308
 309         return None
 310
 311 index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')
 312
 313 class QMPTestCase(unittest.TestCase):
 314     '''Abstract base class for QMP test cases'''
 315
 316     def dictpath(self, d, path):
 317         '''Traverse a path in a nested dict'''
 318         for component in path.split('/'):
 319             m = index_re.match(component)
 320             if m:
 321                 component, idx = m.groups()
 322                 idx = int(idx)
 323
 324             if not isinstance(d, dict) or component not in d:
 325                 self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
 326             d = d[component]
 327
 328             if m:
 329                 if not isinstance(d, list):
 330                     self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d)))
 331                 try:
 332                     d = d[idx]
 333                 except IndexError:
 334                     self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d)))
 335         return d
 336
 337     def assert_qmp_absent(self, d, path):
 338         try:
 339             result = self.dictpath(d, path)
 340         except AssertionError:
 341             return
 342         self.fail('path "%s" has value "%s"' % (path, str(result)))
 343
 344     def assert_qmp(self, d, path, value):
 345         '''Assert that the value for a specific path in a QMP dict matches'''
 346         result = self.dictpath(d, path)
 347         self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value)))
 348
 349     def assert_no_active_block_jobs(self):
 350         result = self.vm.qmp('query-block-jobs')
 351         self.assert_qmp(result, 'return', [])
 352
 353     def cancel_and_wait(self, drive='drive0', force=False, resume=False):
 354         '''Cancel a block job and wait for it to finish, returning the event'''
 355         result = self.vm.qmp('block-job-cancel', device=drive, force=force)
 356         self.assert_qmp(result, 'return', {})
 357
 358         if resume:
 359             self.vm.resume_drive(drive)
 360
 361         cancelled = False
 362         result = None
 363         while not cancelled:
 364             for event in self.vm.get_qmp_events(wait=True):
 365                 if event['event'] == 'BLOCK_JOB_COMPLETED' or \
 366                    event['event'] == 'BLOCK_JOB_CANCELLED':
 367                     self.assert_qmp(event, 'data/device', drive)
 368                     result = event
 369                     cancelled = True
 370
 371         self.assert_no_active_block_jobs()
 372         return result
 373
 374     def wait_until_completed(self, drive='drive0', check_offset=True):
 375         '''Wait for a block job to finish, returning the event'''
 376         completed = False
 377         while not completed:
 378             for event in self.vm.get_qmp_events(wait=True):
 379                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 380                     self.assert_qmp(event, 'data/device', drive)
 381                     self.assert_qmp_absent(event, 'data/error')
 382                     if check_offset:
 383                         self.assert_qmp(event, 'data/offset', event['data']['len'])
 384                     completed = True
 385
 386         self.assert_no_active_block_jobs()
 387         return event
 388
 389     def wait_ready(self, drive='drive0'):
 390         '''Wait until a block job BLOCK_JOB_READY event'''
 391         f = {'data': {'type': 'mirror', 'device': drive } }
 392         event = self.vm.event_wait(name='BLOCK_JOB_READY', match=f)
 393
 394     def wait_ready_and_cancel(self, drive='drive0'):
 395         self.wait_ready(drive=drive)
 396         event = self.cancel_and_wait(drive=drive)
 397         self.assertEquals(event['event'], 'BLOCK_JOB_COMPLETED')
 398         self.assert_qmp(event, 'data/type', 'mirror')
 399         self.assert_qmp(event, 'data/offset', event['data']['len'])
 400
 401     def complete_and_wait(self, drive='drive0', wait_ready=True):
 402         '''Complete a block job and wait for it to finish'''
 403         if wait_ready:
 404             self.wait_ready(drive=drive)
 405
 406         result = self.vm.qmp('block-job-complete', device=drive)
 407         self.assert_qmp(result, 'return', {})
 408
 409         event = self.wait_until_completed(drive=drive)
 410         self.assert_qmp(event, 'data/type', 'mirror')
 411
 412 def notrun(reason):
 413     '''Skip this test suite'''
 414     # Each test in qemu-iotests has a number ("seq")
 415     seq = os.path.basename(sys.argv[0])
 416
 417     open('%s/%s.notrun' % (output_dir, seq), 'wb').write(reason + '\n')
 418     print '%s not run: %s' % (seq, reason)
 419     sys.exit(0)
 420
 421 def verify_image_format(supported_fmts=[]):
 422     if supported_fmts and (imgfmt not in supported_fmts):
 423         notrun('not suitable for this image format: %s' % imgfmt)
 424
 425 def verify_platform(supported_oses=['linux']):
 426     if True not in [sys.platform.startswith(x) for x in supported_oses]:
 427         notrun('not suitable for this OS: %s' % sys.platform)
 428
 429 def main(supported_fmts=[], supported_oses=['linux']):
 430     '''Run tests'''
 431
 432     debug = '-d' in sys.argv
 433     verbosity = 1
 434     verify_image_format(supported_fmts)
 435     verify_platform(supported_oses)
 436
 437     # We need to filter out the time taken from the output so that qemu-iotest
 438     # can reliably diff the results against master output.
 439     import StringIO
 440     if debug:
 441         output = sys.stdout
 442         verbosity = 2
 443         sys.argv.remove('-d')
 444     else:
 445         output = StringIO.StringIO()
 446
 447     class MyTestRunner(unittest.TextTestRunner):
 448         def __init__(self, stream=output, descriptions=True, verbosity=verbosity):
 449             unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
 450
 451     # unittest.main() will use sys.exit() so expect a SystemExit exception
 452     try:
 453         unittest.main(testRunner=MyTestRunner)
 454     finally:
 455         if not debug:
 456             sys.stderr.write(re.sub(r'Ran (\d+) tests? in [\d.]+s', r'Ran \1 tests', output.getvalue()))