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 19import errno 20import os 21import re 22import subprocess 23import string 24import unittest 25import sys 26import struct 27import json 28import signal 29import logging 30import atexit 31 32sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts')) 33import qtest 34 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. 38qemu_img_args = [os.environ.get('QEMU_IMG_PROG', 'qemu-img')] 39if os.environ.get('QEMU_IMG_OPTIONS'): 40 qemu_img_args += os.environ['QEMU_IMG_OPTIONS'].strip().split(' ') 41 42qemu_io_args = [os.environ.get('QEMU_IO_PROG', 'qemu-io')] 43if os.environ.get('QEMU_IO_OPTIONS'): 44 qemu_io_args += os.environ['QEMU_IO_OPTIONS'].strip().split(' ') 45 46qemu_nbd_args = [os.environ.get('QEMU_NBD_PROG', 'qemu-nbd')] 47if os.environ.get('QEMU_NBD_OPTIONS'): 48 qemu_nbd_args += os.environ['QEMU_NBD_OPTIONS'].strip().split(' ') 49 50qemu_prog = os.environ.get('QEMU_PROG', 'qemu') 51qemu_opts = os.environ.get('QEMU_OPTIONS', '').strip().split(' ') 52 53imgfmt = os.environ.get('IMGFMT', 'raw') 54imgproto = os.environ.get('IMGPROTO', 'file') 55test_dir = os.environ.get('TEST_DIR') 56output_dir = os.environ.get('OUTPUT_DIR', '.') 57cachemode = os.environ.get('CACHEMODE') 58qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE') 59 60socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper') 61debug = False 62 63luks_default_secret_object = 'secret,id=keysec0,data=' + \ 64 os.environ['IMGKEYSECRET'] 65luks_default_key_secret_opt = 'key-secret=keysec0' 66 67 68def qemu_img(*args): 69 '''Run qemu-img and return the exit code''' 70 devnull = open('/dev/null', 'r+') 71 exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull) 72 if exitcode < 0: 73 sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) 74 return exitcode 75 76def qemu_img_create(*args): 77 args = list(args) 78 79 # default luks support 80 if '-f' in args and args[args.index('-f') + 1] == 'luks': 81 if '-o' in args: 82 i = args.index('-o') 83 if 'key-secret' not in args[i + 1]: 84 args[i + 1].append(luks_default_key_secret_opt) 85 args.insert(i + 2, '--object') 86 args.insert(i + 3, luks_default_secret_object) 87 else: 88 args = ['-o', luks_default_key_secret_opt, 89 '--object', luks_default_secret_object] + args 90 91 args.insert(0, 'create') 92 93 return qemu_img(*args) 94 95def qemu_img_verbose(*args): 96 '''Run qemu-img without suppressing its output and return the exit code''' 97 exitcode = subprocess.call(qemu_img_args + list(args)) 98 if exitcode < 0: 99 sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) 100 return exitcode 101 102def qemu_img_pipe(*args): 103 '''Run qemu-img and return its output''' 104 subp = subprocess.Popen(qemu_img_args + list(args), 105 stdout=subprocess.PIPE, 106 stderr=subprocess.STDOUT) 107 exitcode = subp.wait() 108 if exitcode < 0: 109 sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) 110 return subp.communicate()[0] 111 112def img_info_log(filename, filter_path=None, imgopts=False, extra_args=[]): 113 args = [ 'info' ] 114 if imgopts: 115 args.append('--image-opts') 116 else: 117 args += [ '-f', imgfmt ] 118 args += extra_args 119 args.append(filename) 120 121 output = qemu_img_pipe(*args) 122 if not filter_path: 123 filter_path = filename 124 log(filter_img_info(output, filter_path)) 125 126def qemu_io(*args): 127 '''Run qemu-io and return the stdout data''' 128 args = qemu_io_args + list(args) 129 subp = subprocess.Popen(args, stdout=subprocess.PIPE, 130 stderr=subprocess.STDOUT) 131 exitcode = subp.wait() 132 if exitcode < 0: 133 sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args))) 134 return subp.communicate()[0] 135 136def qemu_io_silent(*args): 137 '''Run qemu-io and return the exit code, suppressing stdout''' 138 args = qemu_io_args + list(args) 139 exitcode = subprocess.call(args, stdout=open('/dev/null', 'w')) 140 if exitcode < 0: 141 sys.stderr.write('qemu-io received signal %i: %s\n' % 142 (-exitcode, ' '.join(args))) 143 return exitcode 144 145 146class QemuIoInteractive: 147 def __init__(self, *args): 148 self.args = qemu_io_args + list(args) 149 self._p = subprocess.Popen(self.args, stdin=subprocess.PIPE, 150 stdout=subprocess.PIPE, 151 stderr=subprocess.STDOUT) 152 assert self._p.stdout.read(9) == 'qemu-io> ' 153 154 def close(self): 155 self._p.communicate('q\n') 156 157 def _read_output(self): 158 pattern = 'qemu-io> ' 159 n = len(pattern) 160 pos = 0 161 s = [] 162 while pos != n: 163 c = self._p.stdout.read(1) 164 # check unexpected EOF 165 assert c != '' 166 s.append(c) 167 if c == pattern[pos]: 168 pos += 1 169 else: 170 pos = 0 171 172 return ''.join(s[:-n]) 173 174 def cmd(self, cmd): 175 # quit command is in close(), '\n' is added automatically 176 assert '\n' not in cmd 177 cmd = cmd.strip() 178 assert cmd != 'q' and cmd != 'quit' 179 self._p.stdin.write(cmd + '\n') 180 return self._read_output() 181 182 183def qemu_nbd(*args): 184 '''Run qemu-nbd in daemon mode and return the parent's exit code''' 185 return subprocess.call(qemu_nbd_args + ['--fork'] + list(args)) 186 187def compare_images(img1, img2, fmt1=imgfmt, fmt2=imgfmt): 188 '''Return True if two image files are identical''' 189 return qemu_img('compare', '-f', fmt1, 190 '-F', fmt2, img1, img2) == 0 191 192def create_image(name, size): 193 '''Create a fully-allocated raw image with sector markers''' 194 file = open(name, 'w') 195 i = 0 196 while i < size: 197 sector = struct.pack('>l504xl', i / 512, i / 512) 198 file.write(sector) 199 i = i + 512 200 file.close() 201 202def image_size(img): 203 '''Return image's virtual size''' 204 r = qemu_img_pipe('info', '--output=json', '-f', imgfmt, img) 205 return json.loads(r)['virtual-size'] 206 207test_dir_re = re.compile(r"%s" % test_dir) 208def filter_test_dir(msg): 209 return test_dir_re.sub("TEST_DIR", msg) 210 211win32_re = re.compile(r"\r") 212def filter_win32(msg): 213 return win32_re.sub("", msg) 214 215qemu_io_re = re.compile(r"[0-9]* ops; [0-9\/:. sec]* \([0-9\/.inf]* [EPTGMKiBbytes]*\/sec and [0-9\/.inf]* ops\/sec\)") 216def filter_qemu_io(msg): 217 msg = filter_win32(msg) 218 return qemu_io_re.sub("X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)", msg) 219 220chown_re = re.compile(r"chown [0-9]+:[0-9]+") 221def filter_chown(msg): 222 return chown_re.sub("chown UID:GID", msg) 223 224def filter_qmp_event(event): 225 '''Filter a QMP event dict''' 226 event = dict(event) 227 if 'timestamp' in event: 228 event['timestamp']['seconds'] = 'SECS' 229 event['timestamp']['microseconds'] = 'USECS' 230 return event 231 232def filter_testfiles(msg): 233 prefix = os.path.join(test_dir, "%s-" % (os.getpid())) 234 return msg.replace(prefix, 'TEST_DIR/PID-') 235 236def filter_img_info(output, filename): 237 lines = [] 238 for line in output.split('\n'): 239 if 'disk size' in line or 'actual-size' in line: 240 continue 241 line = line.replace(filename, 'TEST_IMG') \ 242 .replace(imgfmt, 'IMGFMT') 243 line = re.sub('iters: [0-9]+', 'iters: XXX', line) 244 line = re.sub('uuid: [-a-f0-9]+', 'uuid: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX', line) 245 lines.append(line) 246 return '\n'.join(lines) 247 248def log(msg, filters=[]): 249 for flt in filters: 250 msg = flt(msg) 251 print msg 252 253class Timeout: 254 def __init__(self, seconds, errmsg = "Timeout"): 255 self.seconds = seconds 256 self.errmsg = errmsg 257 def __enter__(self): 258 signal.signal(signal.SIGALRM, self.timeout) 259 signal.setitimer(signal.ITIMER_REAL, self.seconds) 260 return self 261 def __exit__(self, type, value, traceback): 262 signal.setitimer(signal.ITIMER_REAL, 0) 263 return False 264 def timeout(self, signum, frame): 265 raise Exception(self.errmsg) 266 267 268class FilePath(object): 269 '''An auto-generated filename that cleans itself up. 270 271 Use this context manager to generate filenames and ensure that the file 272 gets deleted:: 273 274 with TestFilePath('test.img') as img_path: 275 qemu_img('create', img_path, '1G') 276 # migration_sock_path is automatically deleted 277 ''' 278 def __init__(self, name): 279 filename = '{0}-{1}'.format(os.getpid(), name) 280 self.path = os.path.join(test_dir, filename) 281 282 def __enter__(self): 283 return self.path 284 285 def __exit__(self, exc_type, exc_val, exc_tb): 286 try: 287 os.remove(self.path) 288 except OSError: 289 pass 290 return False 291 292 293def file_path_remover(): 294 for path in reversed(file_path_remover.paths): 295 try: 296 os.remove(path) 297 except OSError: 298 pass 299 300 301def file_path(*names): 302 ''' Another way to get auto-generated filename that cleans itself up. 303 304 Use is as simple as: 305 306 img_a, img_b = file_path('a.img', 'b.img') 307 sock = file_path('socket') 308 ''' 309 310 if not hasattr(file_path_remover, 'paths'): 311 file_path_remover.paths = [] 312 atexit.register(file_path_remover) 313 314 paths = [] 315 for name in names: 316 filename = '{0}-{1}'.format(os.getpid(), name) 317 path = os.path.join(test_dir, filename) 318 file_path_remover.paths.append(path) 319 paths.append(path) 320 321 return paths[0] if len(paths) == 1 else paths 322 323def remote_filename(path): 324 if imgproto == 'file': 325 return path 326 elif imgproto == 'ssh': 327 return "ssh://127.0.0.1%s" % (path) 328 else: 329 raise Exception("Protocol %s not supported" % (imgproto)) 330 331class VM(qtest.QEMUQtestMachine): 332 '''A QEMU VM''' 333 334 def __init__(self, path_suffix=''): 335 name = "qemu%s-%d" % (path_suffix, os.getpid()) 336 super(VM, self).__init__(qemu_prog, qemu_opts, name=name, 337 test_dir=test_dir, 338 socket_scm_helper=socket_scm_helper) 339 self._num_drives = 0 340 341 def add_object(self, opts): 342 self._args.append('-object') 343 self._args.append(opts) 344 return self 345 346 def add_device(self, opts): 347 self._args.append('-device') 348 self._args.append(opts) 349 return self 350 351 def add_drive_raw(self, opts): 352 self._args.append('-drive') 353 self._args.append(opts) 354 return self 355 356 def add_drive(self, path, opts='', interface='virtio', format=imgfmt): 357 '''Add a virtio-blk drive to the VM''' 358 options = ['if=%s' % interface, 359 'id=drive%d' % self._num_drives] 360 361 if path is not None: 362 options.append('file=%s' % path) 363 options.append('format=%s' % format) 364 options.append('cache=%s' % cachemode) 365 366 if opts: 367 options.append(opts) 368 369 if format == 'luks' and 'key-secret' not in opts: 370 # default luks support 371 if luks_default_secret_object not in self._args: 372 self.add_object(luks_default_secret_object) 373 374 options.append(luks_default_key_secret_opt) 375 376 self._args.append('-drive') 377 self._args.append(','.join(options)) 378 self._num_drives += 1 379 return self 380 381 def add_blockdev(self, opts): 382 self._args.append('-blockdev') 383 if isinstance(opts, str): 384 self._args.append(opts) 385 else: 386 self._args.append(','.join(opts)) 387 return self 388 389 def add_incoming(self, addr): 390 self._args.append('-incoming') 391 self._args.append(addr) 392 return self 393 394 def pause_drive(self, drive, event=None): 395 '''Pause drive r/w operations''' 396 if not event: 397 self.pause_drive(drive, "read_aio") 398 self.pause_drive(drive, "write_aio") 399 return 400 self.qmp('human-monitor-command', 401 command_line='qemu-io %s "break %s bp_%s"' % (drive, event, drive)) 402 403 def resume_drive(self, drive): 404 self.qmp('human-monitor-command', 405 command_line='qemu-io %s "remove_break bp_%s"' % (drive, drive)) 406 407 def hmp_qemu_io(self, drive, cmd): 408 '''Write to a given drive using an HMP command''' 409 return self.qmp('human-monitor-command', 410 command_line='qemu-io %s "%s"' % (drive, cmd)) 411 412 def flatten_qmp_object(self, obj, output=None, basestr=''): 413 if output is None: 414 output = dict() 415 if isinstance(obj, list): 416 for i in range(len(obj)): 417 self.flatten_qmp_object(obj[i], output, basestr + str(i) + '.') 418 elif isinstance(obj, dict): 419 for key in obj: 420 self.flatten_qmp_object(obj[key], output, basestr + key + '.') 421 else: 422 output[basestr[:-1]] = obj # Strip trailing '.' 423 return output 424 425 def qmp_to_opts(self, obj): 426 obj = self.flatten_qmp_object(obj) 427 output_list = list() 428 for key in obj: 429 output_list += [key + '=' + obj[key]] 430 return ','.join(output_list) 431 432 def get_qmp_events_filtered(self, wait=True): 433 result = [] 434 for ev in self.get_qmp_events(wait=wait): 435 result.append(filter_qmp_event(ev)) 436 return result 437 438 def qmp_log(self, cmd, filters=[filter_testfiles], **kwargs): 439 logmsg = "{'execute': '%s', 'arguments': %s}" % (cmd, kwargs) 440 log(logmsg, filters) 441 result = self.qmp(cmd, **kwargs) 442 log(str(result), filters) 443 return result 444 445 def run_job(self, job, auto_finalize=True, auto_dismiss=False): 446 while True: 447 for ev in self.get_qmp_events_filtered(wait=True): 448 if ev['event'] == 'JOB_STATUS_CHANGE': 449 status = ev['data']['status'] 450 if status == 'aborting': 451 result = self.qmp('query-jobs') 452 for j in result['return']: 453 if j['id'] == job: 454 log('Job failed: %s' % (j['error'])) 455 elif status == 'pending' and not auto_finalize: 456 self.qmp_log('job-finalize', id=job) 457 elif status == 'concluded' and not auto_dismiss: 458 self.qmp_log('job-dismiss', id=job) 459 elif status == 'null': 460 return 461 else: 462 iotests.log(ev) 463 464 465index_re = re.compile(r'([^\[]+)\[([^\]]+)\]') 466 467class QMPTestCase(unittest.TestCase): 468 '''Abstract base class for QMP test cases''' 469 470 def dictpath(self, d, path): 471 '''Traverse a path in a nested dict''' 472 for component in path.split('/'): 473 m = index_re.match(component) 474 if m: 475 component, idx = m.groups() 476 idx = int(idx) 477 478 if not isinstance(d, dict) or component not in d: 479 self.fail('failed path traversal for "%s" in "%s"' % (path, str(d))) 480 d = d[component] 481 482 if m: 483 if not isinstance(d, list): 484 self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d))) 485 try: 486 d = d[idx] 487 except IndexError: 488 self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d))) 489 return d 490 491 def assert_qmp_absent(self, d, path): 492 try: 493 result = self.dictpath(d, path) 494 except AssertionError: 495 return 496 self.fail('path "%s" has value "%s"' % (path, str(result))) 497 498 def assert_qmp(self, d, path, value): 499 '''Assert that the value for a specific path in a QMP dict matches''' 500 result = self.dictpath(d, path) 501 self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value))) 502 503 def assert_no_active_block_jobs(self): 504 result = self.vm.qmp('query-block-jobs') 505 self.assert_qmp(result, 'return', []) 506 507 def assert_has_block_node(self, node_name=None, file_name=None): 508 """Issue a query-named-block-nodes and assert node_name and/or 509 file_name is present in the result""" 510 def check_equal_or_none(a, b): 511 return a == None or b == None or a == b 512 assert node_name or file_name 513 result = self.vm.qmp('query-named-block-nodes') 514 for x in result["return"]: 515 if check_equal_or_none(x.get("node-name"), node_name) and \ 516 check_equal_or_none(x.get("file"), file_name): 517 return 518 self.assertTrue(False, "Cannot find %s %s in result:\n%s" % \ 519 (node_name, file_name, result)) 520 521 def assert_json_filename_equal(self, json_filename, reference): 522 '''Asserts that the given filename is a json: filename and that its 523 content is equal to the given reference object''' 524 self.assertEqual(json_filename[:5], 'json:') 525 self.assertEqual(self.vm.flatten_qmp_object(json.loads(json_filename[5:])), 526 self.vm.flatten_qmp_object(reference)) 527 528 def cancel_and_wait(self, drive='drive0', force=False, resume=False): 529 '''Cancel a block job and wait for it to finish, returning the event''' 530 result = self.vm.qmp('block-job-cancel', device=drive, force=force) 531 self.assert_qmp(result, 'return', {}) 532 533 if resume: 534 self.vm.resume_drive(drive) 535 536 cancelled = False 537 result = None 538 while not cancelled: 539 for event in self.vm.get_qmp_events(wait=True): 540 if event['event'] == 'BLOCK_JOB_COMPLETED' or \ 541 event['event'] == 'BLOCK_JOB_CANCELLED': 542 self.assert_qmp(event, 'data/device', drive) 543 result = event 544 cancelled = True 545 elif event['event'] == 'JOB_STATUS_CHANGE': 546 self.assert_qmp(event, 'data/id', drive) 547 548 549 self.assert_no_active_block_jobs() 550 return result 551 552 def wait_until_completed(self, drive='drive0', check_offset=True): 553 '''Wait for a block job to finish, returning the event''' 554 while True: 555 for event in self.vm.get_qmp_events(wait=True): 556 if event['event'] == 'BLOCK_JOB_COMPLETED': 557 self.assert_qmp(event, 'data/device', drive) 558 self.assert_qmp_absent(event, 'data/error') 559 if check_offset: 560 self.assert_qmp(event, 'data/offset', event['data']['len']) 561 self.assert_no_active_block_jobs() 562 return event 563 elif event['event'] == 'JOB_STATUS_CHANGE': 564 self.assert_qmp(event, 'data/id', drive) 565 566 def wait_ready(self, drive='drive0'): 567 '''Wait until a block job BLOCK_JOB_READY event''' 568 f = {'data': {'type': 'mirror', 'device': drive } } 569 event = self.vm.event_wait(name='BLOCK_JOB_READY', match=f) 570 571 def wait_ready_and_cancel(self, drive='drive0'): 572 self.wait_ready(drive=drive) 573 event = self.cancel_and_wait(drive=drive) 574 self.assertEquals(event['event'], 'BLOCK_JOB_COMPLETED') 575 self.assert_qmp(event, 'data/type', 'mirror') 576 self.assert_qmp(event, 'data/offset', event['data']['len']) 577 578 def complete_and_wait(self, drive='drive0', wait_ready=True): 579 '''Complete a block job and wait for it to finish''' 580 if wait_ready: 581 self.wait_ready(drive=drive) 582 583 result = self.vm.qmp('block-job-complete', device=drive) 584 self.assert_qmp(result, 'return', {}) 585 586 event = self.wait_until_completed(drive=drive) 587 self.assert_qmp(event, 'data/type', 'mirror') 588 589 def pause_wait(self, job_id='job0'): 590 with Timeout(1, "Timeout waiting for job to pause"): 591 while True: 592 result = self.vm.qmp('query-block-jobs') 593 found = False 594 for job in result['return']: 595 if job['device'] == job_id: 596 found = True 597 if job['paused'] == True and job['busy'] == False: 598 return job 599 break 600 assert found 601 602 def pause_job(self, job_id='job0', wait=True): 603 result = self.vm.qmp('block-job-pause', device=job_id) 604 self.assert_qmp(result, 'return', {}) 605 if wait: 606 return self.pause_wait(job_id) 607 return result 608 609 610def notrun(reason): 611 '''Skip this test suite''' 612 # Each test in qemu-iotests has a number ("seq") 613 seq = os.path.basename(sys.argv[0]) 614 615 open('%s/%s.notrun' % (output_dir, seq), 'wb').write(reason + '\n') 616 print '%s not run: %s' % (seq, reason) 617 sys.exit(0) 618 619def verify_image_format(supported_fmts=[], unsupported_fmts=[]): 620 assert not (supported_fmts and unsupported_fmts) 621 622 if 'generic' in supported_fmts and \ 623 os.environ.get('IMGFMT_GENERIC', 'true') == 'true': 624 # similar to 625 # _supported_fmt generic 626 # for bash tests 627 return 628 629 not_sup = supported_fmts and (imgfmt not in supported_fmts) 630 if not_sup or (imgfmt in unsupported_fmts): 631 notrun('not suitable for this image format: %s' % imgfmt) 632 633def verify_protocol(supported=[], unsupported=[]): 634 assert not (supported and unsupported) 635 636 if 'generic' in supported: 637 return 638 639 not_sup = supported and (imgproto not in supported) 640 if not_sup or (imgproto in unsupported): 641 notrun('not suitable for this protocol: %s' % imgproto) 642 643def verify_platform(supported_oses=['linux']): 644 if True not in [sys.platform.startswith(x) for x in supported_oses]: 645 notrun('not suitable for this OS: %s' % sys.platform) 646 647def verify_cache_mode(supported_cache_modes=[]): 648 if supported_cache_modes and (cachemode not in supported_cache_modes): 649 notrun('not suitable for this cache mode: %s' % cachemode) 650 651def supports_quorum(): 652 return 'quorum' in qemu_img_pipe('--help') 653 654def verify_quorum(): 655 '''Skip test suite if quorum support is not available''' 656 if not supports_quorum(): 657 notrun('quorum support missing') 658 659def main(supported_fmts=[], supported_oses=['linux'], supported_cache_modes=[], 660 unsupported_fmts=[]): 661 '''Run tests''' 662 663 global debug 664 665 # We are using TEST_DIR and QEMU_DEFAULT_MACHINE as proxies to 666 # indicate that we're not being run via "check". There may be 667 # other things set up by "check" that individual test cases rely 668 # on. 669 if test_dir is None or qemu_default_machine is None: 670 sys.stderr.write('Please run this test via the "check" script\n') 671 sys.exit(os.EX_USAGE) 672 673 debug = '-d' in sys.argv 674 verbosity = 1 675 verify_image_format(supported_fmts, unsupported_fmts) 676 verify_platform(supported_oses) 677 verify_cache_mode(supported_cache_modes) 678 679 # We need to filter out the time taken from the output so that qemu-iotest 680 # can reliably diff the results against master output. 681 import StringIO 682 if debug: 683 output = sys.stdout 684 verbosity = 2 685 sys.argv.remove('-d') 686 else: 687 output = StringIO.StringIO() 688 689 logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN)) 690 691 class MyTestRunner(unittest.TextTestRunner): 692 def __init__(self, stream=output, descriptions=True, verbosity=verbosity): 693 unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity) 694 695 # unittest.main() will use sys.exit() so expect a SystemExit exception 696 try: 697 unittest.main(testRunner=MyTestRunner) 698 finally: 699 if not debug: 700 sys.stderr.write(re.sub(r'Ran (\d+) tests? in [\d.]+s', r'Ran \1 tests', output.getvalue())) 701