tests/qemu-iotests/041

   1 #!/usr/bin/env python3
   2 #
   3 # Tests for image mirroring.
   4 #
   5 # Copyright (C) 2012 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 time
  22 import os
  23 import re
  24 import iotests
  25 from iotests import qemu_img, qemu_io
  26
  27 backing_img = os.path.join(iotests.test_dir, 'backing.img')
  28 target_backing_img = os.path.join(iotests.test_dir, 'target-backing.img')
  29 test_img = os.path.join(iotests.test_dir, 'test.img')
  30 target_img = os.path.join(iotests.test_dir, 'target.img')
  31
  32 quorum_img1 = os.path.join(iotests.test_dir, 'quorum1.img')
  33 quorum_img2 = os.path.join(iotests.test_dir, 'quorum2.img')
  34 quorum_img3 = os.path.join(iotests.test_dir, 'quorum3.img')
  35 quorum_repair_img = os.path.join(iotests.test_dir, 'quorum_repair.img')
  36 quorum_snapshot_file = os.path.join(iotests.test_dir, 'quorum_snapshot.img')
  37
  38 nbd_sock_path = os.path.join(iotests.sock_dir, 'nbd.sock')
  39
  40 class TestSingleDrive(iotests.QMPTestCase):
  41     image_len = 1 * 1024 * 1024 # MB
  42     qmp_cmd = 'drive-mirror'
  43     qmp_target = target_img
  44
  45     def setUp(self):
  46         iotests.create_image(backing_img, self.image_len)
  47         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
  48         self.vm = iotests.VM().add_drive(test_img, "node-name=top,backing.node-name=base")
  49         if iotests.qemu_default_machine == 'pc':
  50             self.vm.add_drive(None, 'media=cdrom', 'ide')
  51         self.vm.launch()
  52
  53     def tearDown(self):
  54         self.vm.shutdown()
  55         os.remove(test_img)
  56         os.remove(backing_img)
  57         try:
  58             os.remove(target_img)
  59         except OSError:
  60             pass
  61
  62     def test_complete(self):
  63         self.assert_no_active_block_jobs()
  64
  65         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
  66                              target=self.qmp_target)
  67         self.assert_qmp(result, 'return', {})
  68
  69         self.complete_and_wait()
  70         result = self.vm.qmp('query-block')
  71         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
  72         self.vm.shutdown()
  73         self.assertTrue(iotests.compare_images(test_img, target_img),
  74                         'target image does not match source after mirroring')
  75
  76     def test_cancel(self):
  77         self.assert_no_active_block_jobs()
  78
  79         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
  80                              target=self.qmp_target)
  81         self.assert_qmp(result, 'return', {})
  82
  83         self.cancel_and_wait(force=True)
  84         result = self.vm.qmp('query-block')
  85         self.assert_qmp(result, 'return[0]/inserted/file', test_img)
  86
  87     def test_cancel_after_ready(self):
  88         self.assert_no_active_block_jobs()
  89
  90         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
  91                              target=self.qmp_target)
  92         self.assert_qmp(result, 'return', {})
  93
  94         self.wait_ready_and_cancel()
  95         result = self.vm.qmp('query-block')
  96         self.assert_qmp(result, 'return[0]/inserted/file', test_img)
  97         self.vm.shutdown()
  98         self.assertTrue(iotests.compare_images(test_img, target_img),
  99                         'target image does not match source after mirroring')
 100
 101     def test_pause(self):
 102         self.assert_no_active_block_jobs()
 103
 104         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 105                              target=self.qmp_target)
 106         self.assert_qmp(result, 'return', {})
 107
 108         self.pause_job('drive0')
 109
 110         result = self.vm.qmp('query-block-jobs')
 111         offset = self.dictpath(result, 'return[0]/offset')
 112
 113         time.sleep(0.5)
 114         result = self.vm.qmp('query-block-jobs')
 115         self.assert_qmp(result, 'return[0]/offset', offset)
 116
 117         result = self.vm.qmp('block-job-resume', device='drive0')
 118         self.assert_qmp(result, 'return', {})
 119
 120         self.complete_and_wait()
 121         self.vm.shutdown()
 122         self.assertTrue(iotests.compare_images(test_img, target_img),
 123                         'target image does not match source after mirroring')
 124
 125     def test_small_buffer(self):
 126         self.assert_no_active_block_jobs()
 127
 128         # A small buffer is rounded up automatically
 129         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 130                              buf_size=4096, target=self.qmp_target)
 131         self.assert_qmp(result, 'return', {})
 132
 133         self.complete_and_wait()
 134         result = self.vm.qmp('query-block')
 135         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 136         self.vm.shutdown()
 137         self.assertTrue(iotests.compare_images(test_img, target_img),
 138                         'target image does not match source after mirroring')
 139
 140     def test_small_buffer2(self):
 141         self.assert_no_active_block_jobs()
 142
 143         qemu_img('create', '-f', iotests.imgfmt, '-o', 'cluster_size=%d,size=%d'
 144                         % (self.image_len, self.image_len), target_img)
 145         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 146                              buf_size=65536, mode='existing', target=self.qmp_target)
 147         self.assert_qmp(result, 'return', {})
 148
 149         self.complete_and_wait()
 150         result = self.vm.qmp('query-block')
 151         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 152         self.vm.shutdown()
 153         self.assertTrue(iotests.compare_images(test_img, target_img),
 154                         'target image does not match source after mirroring')
 155
 156     def test_large_cluster(self):
 157         self.assert_no_active_block_jobs()
 158
 159         qemu_img('create', '-f', iotests.imgfmt, '-o', 'cluster_size=%d,backing_file=%s'
 160                         % (self.image_len, backing_img), target_img)
 161         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 162                              mode='existing', target=self.qmp_target)
 163         self.assert_qmp(result, 'return', {})
 164
 165         self.complete_and_wait()
 166         result = self.vm.qmp('query-block')
 167         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 168         self.vm.shutdown()
 169         self.assertTrue(iotests.compare_images(test_img, target_img),
 170                         'target image does not match source after mirroring')
 171
 172     # Tests that the insertion of the mirror_top filter node doesn't make a
 173     # difference to query-block
 174     def test_implicit_node(self):
 175         self.assert_no_active_block_jobs()
 176
 177         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 178                              target=self.qmp_target)
 179         self.assert_qmp(result, 'return', {})
 180
 181         result = self.vm.qmp('query-block')
 182         self.assert_qmp(result, 'return[0]/inserted/file', test_img)
 183         self.assert_qmp(result, 'return[0]/inserted/drv', iotests.imgfmt)
 184         self.assert_qmp(result, 'return[0]/inserted/backing_file', backing_img)
 185         self.assert_qmp(result, 'return[0]/inserted/backing_file_depth', 1)
 186         self.assert_qmp(result, 'return[0]/inserted/image/filename', test_img)
 187         self.assert_qmp(result, 'return[0]/inserted/image/backing-image/filename', backing_img)
 188
 189         result = self.vm.qmp('query-blockstats')
 190         self.assert_qmp(result, 'return[0]/node-name', 'top')
 191         self.assert_qmp(result, 'return[0]/backing/node-name', 'base')
 192
 193         self.cancel_and_wait(force=True)
 194         result = self.vm.qmp('query-block')
 195         self.assert_qmp(result, 'return[0]/inserted/file', test_img)
 196         self.assert_qmp(result, 'return[0]/inserted/drv', iotests.imgfmt)
 197         self.assert_qmp(result, 'return[0]/inserted/backing_file', backing_img)
 198         self.assert_qmp(result, 'return[0]/inserted/backing_file_depth', 1)
 199         self.assert_qmp(result, 'return[0]/inserted/image/filename', test_img)
 200         self.assert_qmp(result, 'return[0]/inserted/image/backing-image/filename', backing_img)
 201
 202         result = self.vm.qmp('query-blockstats')
 203         self.assert_qmp(result, 'return[0]/node-name', 'top')
 204         self.assert_qmp(result, 'return[0]/backing/node-name', 'base')
 205
 206     def test_medium_not_found(self):
 207         if iotests.qemu_default_machine != 'pc':
 208             return
 209
 210         result = self.vm.qmp(self.qmp_cmd, device='ide1-cd0', sync='full',
 211                              target=self.qmp_target)
 212         self.assert_qmp(result, 'error/class', 'GenericError')
 213
 214     def test_image_not_found(self):
 215         result = self.vm.qmp(self.qmp_cmd, device='drive0', sync='full',
 216                              mode='existing', target=self.qmp_target)
 217         self.assert_qmp(result, 'error/class', 'GenericError')
 218
 219     def test_device_not_found(self):
 220         result = self.vm.qmp(self.qmp_cmd, device='nonexistent', sync='full',
 221                              target=self.qmp_target)
 222         self.assert_qmp(result, 'error/class', 'GenericError')
 223
 224 class TestSingleBlockdev(TestSingleDrive):
 225     qmp_cmd = 'blockdev-mirror'
 226     qmp_target = 'node1'
 227
 228     def setUp(self):
 229         TestSingleDrive.setUp(self)
 230         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, target_img)
 231         args = {'driver': iotests.imgfmt,
 232                 'node-name': self.qmp_target,
 233                 'file': { 'filename': target_img, 'driver': 'file' } }
 234         result = self.vm.qmp("blockdev-add", **args)
 235         self.assert_qmp(result, 'return', {})
 236
 237     def test_mirror_to_self(self):
 238         result = self.vm.qmp(self.qmp_cmd, job_id='job0',
 239                              device=self.qmp_target, sync='full',
 240                              target=self.qmp_target)
 241         self.assert_qmp(result, 'error/class', 'GenericError')
 242
 243     def do_test_resize(self, device, node):
 244         def pre_finalize():
 245             if device:
 246                 result = self.vm.qmp('block_resize', device=device, size=65536)
 247                 self.assert_qmp(result, 'error/class', 'GenericError')
 248
 249             result = self.vm.qmp('block_resize', node_name=node, size=65536)
 250             self.assert_qmp(result, 'error/class', 'GenericError')
 251
 252         result = self.vm.qmp(self.qmp_cmd, job_id='job0', device='drive0',
 253                              sync='full', target=self.qmp_target,
 254                              auto_finalize=False, auto_dismiss=False)
 255         self.assert_qmp(result, 'return', {})
 256
 257         result = self.vm.run_job('job0', auto_finalize=False,
 258                                  pre_finalize=pre_finalize)
 259         self.assertEqual(result, None)
 260
 261     def test_source_resize(self):
 262         self.do_test_resize('drive0', 'top')
 263
 264     def test_target_resize(self):
 265         self.do_test_resize(None, self.qmp_target)
 266
 267     def do_test_target_size(self, size):
 268         result = self.vm.qmp('block_resize', node_name=self.qmp_target,
 269                              size=size)
 270         self.assert_qmp(result, 'return', {})
 271
 272         result = self.vm.qmp(self.qmp_cmd, job_id='job0',
 273                              device='drive0', sync='full', auto_dismiss=False,
 274                              target=self.qmp_target)
 275         self.assert_qmp(result, 'return', {})
 276
 277         result = self.vm.run_job('job0')
 278         self.assertEqual(result, 'Source and target image have different sizes')
 279
 280     def test_small_target(self):
 281         self.do_test_target_size(self.image_len // 2)
 282
 283     def test_large_target(self):
 284         self.do_test_target_size(self.image_len * 2)
 285
 286     test_large_cluster = None
 287     test_image_not_found = None
 288     test_small_buffer2 = None
 289
 290 class TestSingleDriveZeroLength(TestSingleDrive):
 291     image_len = 0
 292     test_small_buffer2 = None
 293     test_large_cluster = None
 294
 295 class TestSingleBlockdevZeroLength(TestSingleBlockdev):
 296     image_len = 0
 297     test_small_target = None
 298     test_large_target = None
 299
 300 class TestSingleDriveUnalignedLength(TestSingleDrive):
 301     image_len = 1025 * 1024
 302     test_small_buffer2 = None
 303     test_large_cluster = None
 304
 305 class TestSingleBlockdevUnalignedLength(TestSingleBlockdev):
 306     image_len = 1025 * 1024
 307
 308 class TestMirrorNoBacking(iotests.QMPTestCase):
 309     image_len = 2 * 1024 * 1024 # MB
 310
 311     def setUp(self):
 312         iotests.create_image(backing_img, TestMirrorNoBacking.image_len)
 313         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 314         self.vm = iotests.VM().add_drive(test_img)
 315         self.vm.launch()
 316
 317     def tearDown(self):
 318         self.vm.shutdown()
 319         os.remove(test_img)
 320         os.remove(backing_img)
 321         try:
 322             os.remove(target_backing_img)
 323         except:
 324             pass
 325         os.remove(target_img)
 326
 327     def test_complete(self):
 328         self.assert_no_active_block_jobs()
 329
 330         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, target_img)
 331         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 332                              mode='existing', target=target_img)
 333         self.assert_qmp(result, 'return', {})
 334
 335         self.complete_and_wait()
 336         result = self.vm.qmp('query-block')
 337         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 338         self.vm.shutdown()
 339         self.assertTrue(iotests.compare_images(test_img, target_img),
 340                         'target image does not match source after mirroring')
 341
 342     def test_cancel(self):
 343         self.assert_no_active_block_jobs()
 344
 345         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, target_img)
 346         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 347                              mode='existing', target=target_img)
 348         self.assert_qmp(result, 'return', {})
 349
 350         self.wait_ready_and_cancel()
 351         result = self.vm.qmp('query-block')
 352         self.assert_qmp(result, 'return[0]/inserted/file', test_img)
 353         self.vm.shutdown()
 354         self.assertTrue(iotests.compare_images(test_img, target_img),
 355                         'target image does not match source after mirroring')
 356
 357     def test_large_cluster(self):
 358         self.assert_no_active_block_jobs()
 359
 360         # qemu-img create fails if the image is not there
 361         qemu_img('create', '-f', iotests.imgfmt, '-o', 'size=%d'
 362                         %(TestMirrorNoBacking.image_len), target_backing_img)
 363         qemu_img('create', '-f', iotests.imgfmt, '-o', 'cluster_size=%d,backing_file=%s'
 364                         % (TestMirrorNoBacking.image_len, target_backing_img), target_img)
 365
 366         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 367                              mode='existing', target=target_img)
 368         self.assert_qmp(result, 'return', {})
 369
 370         self.complete_and_wait()
 371         result = self.vm.qmp('query-block')
 372         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 373         self.vm.shutdown()
 374         self.assertTrue(iotests.compare_images(test_img, target_img),
 375                         'target image does not match source after mirroring')
 376
 377 class TestMirrorResized(iotests.QMPTestCase):
 378     backing_len = 1 * 1024 * 1024 # MB
 379     image_len = 2 * 1024 * 1024 # MB
 380
 381     def setUp(self):
 382         iotests.create_image(backing_img, TestMirrorResized.backing_len)
 383         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 384         qemu_img('resize', test_img, '2M')
 385         self.vm = iotests.VM().add_drive(test_img)
 386         self.vm.launch()
 387
 388     def tearDown(self):
 389         self.vm.shutdown()
 390         os.remove(test_img)
 391         os.remove(backing_img)
 392         try:
 393             os.remove(target_img)
 394         except OSError:
 395             pass
 396
 397     def test_complete_top(self):
 398         self.assert_no_active_block_jobs()
 399
 400         result = self.vm.qmp('drive-mirror', device='drive0', sync='top',
 401                              target=target_img)
 402         self.assert_qmp(result, 'return', {})
 403
 404         self.complete_and_wait()
 405         result = self.vm.qmp('query-block')
 406         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 407         self.vm.shutdown()
 408         self.assertTrue(iotests.compare_images(test_img, target_img),
 409                         'target image does not match source after mirroring')
 410
 411     def test_complete_full(self):
 412         self.assert_no_active_block_jobs()
 413
 414         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 415                              target=target_img)
 416         self.assert_qmp(result, 'return', {})
 417
 418         self.complete_and_wait()
 419         result = self.vm.qmp('query-block')
 420         self.assert_qmp(result, 'return[0]/inserted/file', target_img)
 421         self.vm.shutdown()
 422         self.assertTrue(iotests.compare_images(test_img, target_img),
 423                         'target image does not match source after mirroring')
 424
 425 class TestReadErrors(iotests.QMPTestCase):
 426     image_len = 2 * 1024 * 1024 # MB
 427
 428     # this should be a multiple of twice the default granularity
 429     # so that we hit this offset first in state 1
 430     MIRROR_GRANULARITY = 1024 * 1024
 431
 432     def create_blkdebug_file(self, name, event, errno):
 433         file = open(name, 'w')
 434         file.write('''
 435 [inject-error]
 436 state = "1"
 437 event = "%s"
 438 errno = "%d"
 439 immediately = "off"
 440 once = "on"
 441 sector = "%d"
 442
 443 [set-state]
 444 state = "1"
 445 event = "%s"
 446 new_state = "2"
 447
 448 [set-state]
 449 state = "2"
 450 event = "%s"
 451 new_state = "1"
 452 ''' % (event, errno, self.MIRROR_GRANULARITY // 512, event, event))
 453         file.close()
 454
 455     def setUp(self):
 456         self.blkdebug_file = backing_img + ".blkdebug"
 457         iotests.create_image(backing_img, TestReadErrors.image_len)
 458         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 5)
 459         qemu_img('create', '-f', iotests.imgfmt,
 460                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 461                        % (self.blkdebug_file, backing_img),
 462                  test_img)
 463         # Write something for tests that use sync='top'
 464         qemu_io('-c', 'write %d 512' % (self.MIRROR_GRANULARITY + 65536),
 465                         test_img)
 466         self.vm = iotests.VM().add_drive(test_img)
 467         self.vm.launch()
 468
 469     def tearDown(self):
 470         self.vm.shutdown()
 471         os.remove(test_img)
 472         os.remove(target_img)
 473         os.remove(backing_img)
 474         os.remove(self.blkdebug_file)
 475
 476     def test_report_read(self):
 477         self.assert_no_active_block_jobs()
 478
 479         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 480                              target=target_img)
 481         self.assert_qmp(result, 'return', {})
 482
 483         completed = False
 484         error = False
 485         while not completed:
 486             for event in self.vm.get_qmp_events(wait=True):
 487                 if event['event'] == 'BLOCK_JOB_ERROR':
 488                     self.assert_qmp(event, 'data/device', 'drive0')
 489                     self.assert_qmp(event, 'data/operation', 'read')
 490                     error = True
 491                 elif event['event'] == 'BLOCK_JOB_READY':
 492                     self.assertTrue(False, 'job completed unexpectedly')
 493                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 494                     self.assertTrue(error, 'job completed unexpectedly')
 495                     self.assert_qmp(event, 'data/type', 'mirror')
 496                     self.assert_qmp(event, 'data/device', 'drive0')
 497                     self.assert_qmp(event, 'data/error', 'Input/output error')
 498                     completed = True
 499                 elif event['event'] == 'JOB_STATUS_CHANGE':
 500                     self.assert_qmp(event, 'data/id', 'drive0')
 501
 502         self.assert_no_active_block_jobs()
 503
 504     def test_ignore_read(self):
 505         self.assert_no_active_block_jobs()
 506
 507         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 508                              target=target_img, on_source_error='ignore')
 509         self.assert_qmp(result, 'return', {})
 510
 511         event = self.vm.get_qmp_event(wait=True)
 512         while event['event'] == 'JOB_STATUS_CHANGE':
 513             self.assert_qmp(event, 'data/id', 'drive0')
 514             event = self.vm.get_qmp_event(wait=True)
 515
 516         self.assertEqual(event['event'], 'BLOCK_JOB_ERROR')
 517         self.assert_qmp(event, 'data/device', 'drive0')
 518         self.assert_qmp(event, 'data/operation', 'read')
 519         result = self.vm.qmp('query-block-jobs')
 520         self.assert_qmp(result, 'return[0]/paused', False)
 521         self.complete_and_wait()
 522
 523     def test_large_cluster(self):
 524         self.assert_no_active_block_jobs()
 525
 526         # Test COW into the target image.  The first half of the
 527         # cluster at MIRROR_GRANULARITY has to be copied from
 528         # backing_img, even though sync='top'.
 529         qemu_img('create', '-f', iotests.imgfmt, '-ocluster_size=131072,backing_file=%s' %(backing_img), target_img)
 530         result = self.vm.qmp('drive-mirror', device='drive0', sync='top',
 531                              on_source_error='ignore',
 532                              mode='existing', target=target_img)
 533         self.assert_qmp(result, 'return', {})
 534
 535         event = self.vm.get_qmp_event(wait=True)
 536         while event['event'] == 'JOB_STATUS_CHANGE':
 537             self.assert_qmp(event, 'data/id', 'drive0')
 538             event = self.vm.get_qmp_event(wait=True)
 539
 540         self.assertEqual(event['event'], 'BLOCK_JOB_ERROR')
 541         self.assert_qmp(event, 'data/device', 'drive0')
 542         self.assert_qmp(event, 'data/operation', 'read')
 543         result = self.vm.qmp('query-block-jobs')
 544         self.assert_qmp(result, 'return[0]/paused', False)
 545         self.complete_and_wait()
 546         self.vm.shutdown()
 547
 548         # Detach blkdebug to compare images successfully
 549         qemu_img('rebase', '-f', iotests.imgfmt, '-u', '-b', backing_img, test_img)
 550         self.assertTrue(iotests.compare_images(test_img, target_img),
 551                         'target image does not match source after mirroring')
 552
 553     def test_stop_read(self):
 554         self.assert_no_active_block_jobs()
 555
 556         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 557                              target=target_img, on_source_error='stop')
 558         self.assert_qmp(result, 'return', {})
 559
 560         error = False
 561         ready = False
 562         while not ready:
 563             for event in self.vm.get_qmp_events(wait=True):
 564                 if event['event'] == 'BLOCK_JOB_ERROR':
 565                     self.assert_qmp(event, 'data/device', 'drive0')
 566                     self.assert_qmp(event, 'data/operation', 'read')
 567
 568                     result = self.vm.qmp('query-block-jobs')
 569                     self.assert_qmp(result, 'return[0]/paused', True)
 570                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 571
 572                     result = self.vm.qmp('block-job-resume', device='drive0')
 573                     self.assert_qmp(result, 'return', {})
 574                     error = True
 575                 elif event['event'] == 'BLOCK_JOB_READY':
 576                     self.assertTrue(error, 'job completed unexpectedly')
 577                     self.assert_qmp(event, 'data/device', 'drive0')
 578                     ready = True
 579
 580         result = self.vm.qmp('query-block-jobs')
 581         self.assert_qmp(result, 'return[0]/paused', False)
 582         self.assert_qmp(result, 'return[0]/io-status', 'ok')
 583
 584         self.complete_and_wait(wait_ready=False)
 585         self.assert_no_active_block_jobs()
 586
 587 class TestWriteErrors(iotests.QMPTestCase):
 588     image_len = 2 * 1024 * 1024 # MB
 589
 590     # this should be a multiple of twice the default granularity
 591     # so that we hit this offset first in state 1
 592     MIRROR_GRANULARITY = 1024 * 1024
 593
 594     def create_blkdebug_file(self, name, event, errno):
 595         file = open(name, 'w')
 596         file.write('''
 597 [inject-error]
 598 state = "1"
 599 event = "%s"
 600 errno = "%d"
 601 immediately = "off"
 602 once = "on"
 603 sector = "%d"
 604
 605 [set-state]
 606 state = "1"
 607 event = "%s"
 608 new_state = "2"
 609
 610 [set-state]
 611 state = "2"
 612 event = "%s"
 613 new_state = "1"
 614 ''' % (event, errno, self.MIRROR_GRANULARITY // 512, event, event))
 615         file.close()
 616
 617     def setUp(self):
 618         self.blkdebug_file = target_img + ".blkdebug"
 619         iotests.create_image(backing_img, TestWriteErrors.image_len)
 620         self.create_blkdebug_file(self.blkdebug_file, "write_aio", 5)
 621         qemu_img('create', '-f', iotests.imgfmt, '-obacking_file=%s' %(backing_img), test_img)
 622         self.vm = iotests.VM().add_drive(test_img)
 623         self.target_img = 'blkdebug:%s:%s' % (self.blkdebug_file, target_img)
 624         qemu_img('create', '-f', iotests.imgfmt, '-osize=%d' %(TestWriteErrors.image_len), target_img)
 625         self.vm.launch()
 626
 627     def tearDown(self):
 628         self.vm.shutdown()
 629         os.remove(test_img)
 630         os.remove(target_img)
 631         os.remove(backing_img)
 632         os.remove(self.blkdebug_file)
 633
 634     def test_report_write(self):
 635         self.assert_no_active_block_jobs()
 636
 637         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 638                              mode='existing', target=self.target_img)
 639         self.assert_qmp(result, 'return', {})
 640
 641         completed = False
 642         error = False
 643         while not completed:
 644             for event in self.vm.get_qmp_events(wait=True):
 645                 if event['event'] == 'BLOCK_JOB_ERROR':
 646                     self.assert_qmp(event, 'data/device', 'drive0')
 647                     self.assert_qmp(event, 'data/operation', 'write')
 648                     error = True
 649                 elif event['event'] == 'BLOCK_JOB_READY':
 650                     self.assertTrue(False, 'job completed unexpectedly')
 651                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 652                     self.assertTrue(error, 'job completed unexpectedly')
 653                     self.assert_qmp(event, 'data/type', 'mirror')
 654                     self.assert_qmp(event, 'data/device', 'drive0')
 655                     self.assert_qmp(event, 'data/error', 'Input/output error')
 656                     completed = True
 657
 658         self.assert_no_active_block_jobs()
 659
 660     def test_ignore_write(self):
 661         self.assert_no_active_block_jobs()
 662
 663         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 664                              mode='existing', target=self.target_img,
 665                              on_target_error='ignore')
 666         self.assert_qmp(result, 'return', {})
 667
 668         event = self.vm.event_wait(name='BLOCK_JOB_ERROR')
 669         self.assertEqual(event['event'], 'BLOCK_JOB_ERROR')
 670         self.assert_qmp(event, 'data/device', 'drive0')
 671         self.assert_qmp(event, 'data/operation', 'write')
 672         result = self.vm.qmp('query-block-jobs')
 673         self.assert_qmp(result, 'return[0]/paused', False)
 674         self.complete_and_wait()
 675
 676     def test_stop_write(self):
 677         self.assert_no_active_block_jobs()
 678
 679         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 680                              mode='existing', target=self.target_img,
 681                              on_target_error='stop')
 682         self.assert_qmp(result, 'return', {})
 683
 684         error = False
 685         ready = False
 686         while not ready:
 687             for event in self.vm.get_qmp_events(wait=True):
 688                 if event['event'] == 'BLOCK_JOB_ERROR':
 689                     self.assert_qmp(event, 'data/device', 'drive0')
 690                     self.assert_qmp(event, 'data/operation', 'write')
 691
 692                     result = self.vm.qmp('query-block-jobs')
 693                     self.assert_qmp(result, 'return[0]/paused', True)
 694                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 695
 696                     result = self.vm.qmp('block-job-resume', device='drive0')
 697                     self.assert_qmp(result, 'return', {})
 698
 699                     result = self.vm.qmp('query-block-jobs')
 700                     self.assert_qmp(result, 'return[0]/paused', False)
 701                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 702                     error = True
 703                 elif event['event'] == 'BLOCK_JOB_READY':
 704                     self.assertTrue(error, 'job completed unexpectedly')
 705                     self.assert_qmp(event, 'data/device', 'drive0')
 706                     ready = True
 707
 708         self.complete_and_wait(wait_ready=False)
 709         self.assert_no_active_block_jobs()
 710
 711 class TestSetSpeed(iotests.QMPTestCase):
 712     image_len = 80 * 1024 * 1024 # MB
 713
 714     def setUp(self):
 715         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 716         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 717         self.vm = iotests.VM().add_drive(test_img)
 718         self.vm.launch()
 719
 720     def tearDown(self):
 721         self.vm.shutdown()
 722         os.remove(test_img)
 723         os.remove(backing_img)
 724         os.remove(target_img)
 725
 726     def test_set_speed(self):
 727         self.assert_no_active_block_jobs()
 728
 729         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 730                              target=target_img)
 731         self.assert_qmp(result, 'return', {})
 732
 733         # Default speed is 0
 734         result = self.vm.qmp('query-block-jobs')
 735         self.assert_qmp(result, 'return[0]/device', 'drive0')
 736         self.assert_qmp(result, 'return[0]/speed', 0)
 737
 738         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 739         self.assert_qmp(result, 'return', {})
 740
 741         # Ensure the speed we set was accepted
 742         result = self.vm.qmp('query-block-jobs')
 743         self.assert_qmp(result, 'return[0]/device', 'drive0')
 744         self.assert_qmp(result, 'return[0]/speed', 8 * 1024 * 1024)
 745
 746         self.wait_ready_and_cancel()
 747
 748         # Check setting speed in drive-mirror works
 749         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 750                              target=target_img, speed=4*1024*1024)
 751         self.assert_qmp(result, 'return', {})
 752
 753         result = self.vm.qmp('query-block-jobs')
 754         self.assert_qmp(result, 'return[0]/device', 'drive0')
 755         self.assert_qmp(result, 'return[0]/speed', 4 * 1024 * 1024)
 756
 757         self.wait_ready_and_cancel()
 758
 759     def test_set_speed_invalid(self):
 760         self.assert_no_active_block_jobs()
 761
 762         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 763                              target=target_img, speed=-1)
 764         self.assert_qmp(result, 'error/class', 'GenericError')
 765
 766         self.assert_no_active_block_jobs()
 767
 768         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
 769                              target=target_img)
 770         self.assert_qmp(result, 'return', {})
 771
 772         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=-1)
 773         self.assert_qmp(result, 'error/class', 'GenericError')
 774
 775         self.wait_ready_and_cancel()
 776
 777 class TestUnbackedSource(iotests.QMPTestCase):
 778     image_len = 2 * 1024 * 1024 # MB
 779
 780     def setUp(self):
 781         qemu_img('create', '-f', iotests.imgfmt, test_img,
 782                  str(TestUnbackedSource.image_len))
 783         self.vm = iotests.VM()
 784         self.vm.launch()
 785         result = self.vm.qmp('blockdev-add', node_name='drive0',
 786                              driver=iotests.imgfmt,
 787                              file={
 788                                  'driver': 'file',
 789                                  'filename': test_img,
 790                              })
 791         self.assert_qmp(result, 'return', {})
 792
 793     def tearDown(self):
 794         self.vm.shutdown()
 795         os.remove(test_img)
 796         os.remove(target_img)
 797
 798     def test_absolute_paths_full(self):
 799         self.assert_no_active_block_jobs()
 800         result = self.vm.qmp('drive-mirror', job_id='drive0', device='drive0',
 801                              sync='full', target=target_img,
 802                              mode='absolute-paths')
 803         self.assert_qmp(result, 'return', {})
 804         self.complete_and_wait()
 805         self.assert_no_active_block_jobs()
 806
 807     def test_absolute_paths_top(self):
 808         self.assert_no_active_block_jobs()
 809         result = self.vm.qmp('drive-mirror', job_id='drive0', device='drive0',
 810                              sync='top', target=target_img,
 811                              mode='absolute-paths')
 812         self.assert_qmp(result, 'return', {})
 813         self.complete_and_wait()
 814         self.assert_no_active_block_jobs()
 815
 816     def test_absolute_paths_none(self):
 817         self.assert_no_active_block_jobs()
 818         result = self.vm.qmp('drive-mirror', job_id='drive0', device='drive0',
 819                              sync='none', target=target_img,
 820                              mode='absolute-paths')
 821         self.assert_qmp(result, 'return', {})
 822         self.complete_and_wait()
 823         self.assert_no_active_block_jobs()
 824
 825     def test_existing_full(self):
 826         qemu_img('create', '-f', iotests.imgfmt, target_img,
 827                  str(self.image_len))
 828         qemu_io('-c', 'write -P 42 0 64k', target_img)
 829
 830         self.assert_no_active_block_jobs()
 831         result = self.vm.qmp('drive-mirror', job_id='drive0', device='drive0',
 832                              sync='full', target=target_img, mode='existing')
 833         self.assert_qmp(result, 'return', {})
 834         self.complete_and_wait()
 835         self.assert_no_active_block_jobs()
 836
 837         result = self.vm.qmp('blockdev-del', node_name='drive0')
 838         self.assert_qmp(result, 'return', {})
 839
 840         self.assertTrue(iotests.compare_images(test_img, target_img),
 841                         'target image does not match source after mirroring')
 842
 843     def test_blockdev_full(self):
 844         qemu_img('create', '-f', iotests.imgfmt, target_img,
 845                  str(self.image_len))
 846         qemu_io('-c', 'write -P 42 0 64k', target_img)
 847
 848         result = self.vm.qmp('blockdev-add', node_name='target',
 849                              driver=iotests.imgfmt,
 850                              file={
 851                                  'driver': 'file',
 852                                  'filename': target_img,
 853                              })
 854         self.assert_qmp(result, 'return', {})
 855
 856         self.assert_no_active_block_jobs()
 857         result = self.vm.qmp('blockdev-mirror', job_id='drive0', device='drive0',
 858                              sync='full', target='target')
 859         self.assert_qmp(result, 'return', {})
 860         self.complete_and_wait()
 861         self.assert_no_active_block_jobs()
 862
 863         result = self.vm.qmp('blockdev-del', node_name='drive0')
 864         self.assert_qmp(result, 'return', {})
 865
 866         result = self.vm.qmp('blockdev-del', node_name='target')
 867         self.assert_qmp(result, 'return', {})
 868
 869         self.assertTrue(iotests.compare_images(test_img, target_img),
 870                         'target image does not match source after mirroring')
 871
 872 class TestGranularity(iotests.QMPTestCase):
 873     image_len = 10 * 1024 * 1024 # MB
 874
 875     def setUp(self):
 876         qemu_img('create', '-f', iotests.imgfmt, test_img,
 877                  str(TestGranularity.image_len))
 878         qemu_io('-c', 'write 0 %d' % (self.image_len),
 879                 test_img)
 880         self.vm = iotests.VM().add_drive(test_img)
 881         self.vm.launch()
 882
 883     def tearDown(self):
 884         self.vm.shutdown()
 885         self.assertTrue(iotests.compare_images(test_img, target_img),
 886                         'target image does not match source after mirroring')
 887         os.remove(test_img)
 888         os.remove(target_img)
 889
 890     def test_granularity(self):
 891         self.assert_no_active_block_jobs()
 892         result = self.vm.qmp('drive-mirror', device='drive0',
 893                              sync='full', target=target_img,
 894                              mode='absolute-paths', granularity=8192)
 895         self.assert_qmp(result, 'return', {})
 896
 897         event = self.vm.get_qmp_event(wait=60.0)
 898         while event['event'] == 'JOB_STATUS_CHANGE':
 899             self.assert_qmp(event, 'data/id', 'drive0')
 900             event = self.vm.get_qmp_event(wait=60.0)
 901
 902         # Failures will manifest as COMPLETED/ERROR.
 903         self.assert_qmp(event, 'event', 'BLOCK_JOB_READY')
 904         self.complete_and_wait(drive='drive0', wait_ready=False)
 905         self.assert_no_active_block_jobs()
 906
 907 class TestRepairQuorum(iotests.QMPTestCase):
 908     """ This class test quorum file repair using drive-mirror.
 909         It's mostly a fork of TestSingleDrive """
 910     image_len = 1 * 1024 * 1024 # MB
 911     IMAGES = [ quorum_img1, quorum_img2, quorum_img3 ]
 912
 913     @iotests.skip_if_unsupported(['quorum'])
 914     def setUp(self):
 915         self.vm = iotests.VM()
 916
 917         if iotests.qemu_default_machine == 'pc':
 918             self.vm.add_drive(None, 'media=cdrom', 'ide')
 919
 920         # Add each individual quorum images
 921         for i in self.IMAGES:
 922             qemu_img('create', '-f', iotests.imgfmt, i,
 923                      str(self.image_len))
 924             # Assign a node name to each quorum image in order to manipulate
 925             # them
 926             opts = "node-name=img%i" % self.IMAGES.index(i)
 927             opts += ',driver=%s' % iotests.imgfmt
 928             opts += ',file.driver=file'
 929             opts += ',file.filename=%s' % i
 930             self.vm = self.vm.add_blockdev(opts)
 931
 932         self.vm.launch()
 933
 934         #assemble the quorum block device from the individual files
 935         args = { "driver": "quorum", "node-name": "quorum0",
 936                  "vote-threshold": 2, "children": [ "img0", "img1", "img2" ] }
 937         result = self.vm.qmp("blockdev-add", **args)
 938         self.assert_qmp(result, 'return', {})
 939
 940
 941     def tearDown(self):
 942         self.vm.shutdown()
 943         for i in self.IMAGES + [ quorum_repair_img, quorum_snapshot_file,
 944                                  nbd_sock_path ]:
 945             # Do a try/except because the test may have deleted some images
 946             try:
 947                 os.remove(i)
 948             except OSError:
 949                 pass
 950
 951     def test_complete(self):
 952         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
 953                              sync='full', node_name="repair0", replaces="img1",
 954                              target=quorum_repair_img, format=iotests.imgfmt)
 955         self.assert_qmp(result, 'return', {})
 956
 957         self.complete_and_wait(drive="job0")
 958         self.assert_has_block_node("repair0", quorum_repair_img)
 959         self.vm.assert_block_path('quorum0', '/children.1', 'repair0')
 960         self.vm.shutdown()
 961         self.assertTrue(iotests.compare_images(quorum_img2, quorum_repair_img),
 962                         'target image does not match source after mirroring')
 963
 964     def test_cancel(self):
 965         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
 966                              sync='full', node_name="repair0", replaces="img1",
 967                              target=quorum_repair_img, format=iotests.imgfmt)
 968         self.assert_qmp(result, 'return', {})
 969
 970         self.cancel_and_wait(drive="job0", force=True)
 971         # here we check that the last registered quorum file has not been
 972         # swapped out and unref
 973         self.assert_has_block_node(None, quorum_img3)
 974
 975     def test_cancel_after_ready(self):
 976         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
 977                              sync='full', node_name="repair0", replaces="img1",
 978                              target=quorum_repair_img, format=iotests.imgfmt)
 979         self.assert_qmp(result, 'return', {})
 980
 981         self.wait_ready_and_cancel(drive="job0")
 982         # here we check that the last registered quorum file has not been
 983         # swapped out and unref
 984         self.assert_has_block_node(None, quorum_img3)
 985         self.vm.shutdown()
 986         self.assertTrue(iotests.compare_images(quorum_img2, quorum_repair_img),
 987                         'target image does not match source after mirroring')
 988
 989     def test_pause(self):
 990         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
 991                              sync='full', node_name="repair0", replaces="img1",
 992                              target=quorum_repair_img, format=iotests.imgfmt)
 993         self.assert_qmp(result, 'return', {})
 994
 995         self.pause_job('job0')
 996
 997         result = self.vm.qmp('query-block-jobs')
 998         offset = self.dictpath(result, 'return[0]/offset')
 999
1000         time.sleep(0.5)
1001         result = self.vm.qmp('query-block-jobs')
1002         self.assert_qmp(result, 'return[0]/offset', offset)
1003
1004         result = self.vm.qmp('block-job-resume', device='job0')
1005         self.assert_qmp(result, 'return', {})
1006
1007         self.complete_and_wait(drive="job0")
1008         self.vm.shutdown()
1009         self.assertTrue(iotests.compare_images(quorum_img2, quorum_repair_img),
1010                         'target image does not match source after mirroring')
1011
1012     def test_medium_not_found(self):
1013         if iotests.qemu_default_machine != 'pc':
1014             return
1015
1016         result = self.vm.qmp('drive-mirror', job_id='job0', device='drive0', # CD-ROM
1017                              sync='full',
1018                              node_name='repair0',
1019                              replaces='img1',
1020                              target=quorum_repair_img, format=iotests.imgfmt)
1021         self.assert_qmp(result, 'error/class', 'GenericError')
1022
1023     def test_image_not_found(self):
1024         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
1025                              sync='full', node_name='repair0', replaces='img1',
1026                              mode='existing', target=quorum_repair_img,
1027                              format=iotests.imgfmt)
1028         self.assert_qmp(result, 'error/class', 'GenericError')
1029
1030     def test_device_not_found(self):
1031         result = self.vm.qmp('drive-mirror', job_id='job0',
1032                              device='nonexistent', sync='full',
1033                              node_name='repair0',
1034                              replaces='img1',
1035                              target=quorum_repair_img, format=iotests.imgfmt)
1036         self.assert_qmp(result, 'error/class', 'GenericError')
1037
1038     def test_wrong_sync_mode(self):
1039         result = self.vm.qmp('drive-mirror', device='quorum0', job_id='job0',
1040                              node_name='repair0',
1041                              replaces='img1',
1042                              target=quorum_repair_img, format=iotests.imgfmt)
1043         self.assert_qmp(result, 'error/class', 'GenericError')
1044
1045     def test_no_node_name(self):
1046         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
1047                              sync='full', replaces='img1',
1048                              target=quorum_repair_img, format=iotests.imgfmt)
1049         self.assert_qmp(result, 'error/class', 'GenericError')
1050
1051     def test_nonexistent_replaces(self):
1052         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
1053                              sync='full', node_name='repair0', replaces='img77',
1054                              target=quorum_repair_img, format=iotests.imgfmt)
1055         self.assert_qmp(result, 'error/class', 'GenericError')
1056
1057     def test_after_a_quorum_snapshot(self):
1058         result = self.vm.qmp('blockdev-snapshot-sync', node_name='img1',
1059                              snapshot_file=quorum_snapshot_file,
1060                              snapshot_node_name="snap1");
1061
1062         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
1063                              sync='full', node_name='repair0', replaces="img1",
1064                              target=quorum_repair_img, format=iotests.imgfmt)
1065         self.assert_qmp(result, 'error/class', 'GenericError')
1066
1067         result = self.vm.qmp('drive-mirror', job_id='job0', device='quorum0',
1068                              sync='full', node_name='repair0', replaces="snap1",
1069                              target=quorum_repair_img, format=iotests.imgfmt)
1070         self.assert_qmp(result, 'return', {})
1071
1072         self.complete_and_wait('job0')
1073         self.assert_has_block_node("repair0", quorum_repair_img)
1074         self.vm.assert_block_path('quorum0', '/children.1', 'repair0')
1075
1076     def test_with_other_parent(self):
1077         """
1078         Check that we cannot replace a Quorum child when it has other
1079         parents.
1080         """
1081         result = self.vm.qmp('nbd-server-start',
1082                              addr={
1083                                  'type': 'unix',
1084                                  'data': {'path': nbd_sock_path}
1085                              })
1086         self.assert_qmp(result, 'return', {})
1087
1088         result = self.vm.qmp('nbd-server-add', device='img1')
1089         self.assert_qmp(result, 'return', {})
1090
1091         result = self.vm.qmp('drive-mirror', job_id='mirror', device='quorum0',
1092                              sync='full', node_name='repair0', replaces='img1',
1093                              target=quorum_repair_img, format=iotests.imgfmt)
1094         self.assert_qmp(result, 'error/desc',
1095                         "Cannot replace 'img1' by a node mirrored from "
1096                         "'quorum0', because it cannot be guaranteed that doing "
1097                         "so would not lead to an abrupt change of visible data")
1098
1099     def test_with_other_parents_after_mirror_start(self):
1100         """
1101         The same as test_with_other_parent(), but add the NBD server
1102         only when the mirror job is already running.
1103         """
1104         result = self.vm.qmp('nbd-server-start',
1105                              addr={
1106                                  'type': 'unix',
1107                                  'data': {'path': nbd_sock_path}
1108                              })
1109         self.assert_qmp(result, 'return', {})
1110
1111         result = self.vm.qmp('drive-mirror', job_id='mirror', device='quorum0',
1112                              sync='full', node_name='repair0', replaces='img1',
1113                              target=quorum_repair_img, format=iotests.imgfmt)
1114         self.assert_qmp(result, 'return', {})
1115
1116         result = self.vm.qmp('nbd-server-add', device='img1')
1117         self.assert_qmp(result, 'return', {})
1118
1119         # The full error message goes to stderr, we will check it later
1120         self.complete_and_wait('mirror',
1121                                completion_error='Operation not permitted')
1122
1123         # Should not have been replaced
1124         self.vm.assert_block_path('quorum0', '/children.1', 'img1')
1125
1126         # Check the full error message now
1127         self.vm.shutdown()
1128         log = self.vm.get_log()
1129         log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
1130         log = re.sub(r'^Formatting.*\n', '', log)
1131         log = re.sub(r'\n\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
1132         log = re.sub(r'^%s: ' % os.path.basename(iotests.qemu_prog), '', log)
1133
1134         self.assertEqual(log,
1135                          "Can no longer replace 'img1' by 'repair0', because " +
1136                          "it can no longer be guaranteed that doing so would " +
1137                          "not lead to an abrupt change of visible data")
1138
1139
1140 # Test mirroring with a source that does not have any parents (not even a
1141 # BlockBackend)
1142 class TestOrphanedSource(iotests.QMPTestCase):
1143     def setUp(self):
1144         blk0 = { 'node-name': 'src',
1145                  'driver': 'null-co' }
1146
1147         blk1 = { 'node-name': 'dest',
1148                  'driver': 'null-co' }
1149
1150         blk2 = { 'node-name': 'dest-ro',
1151                  'driver': 'null-co',
1152                  'read-only': 'on' }
1153
1154         self.vm = iotests.VM()
1155         self.vm.add_blockdev(self.vm.qmp_to_opts(blk0))
1156         self.vm.add_blockdev(self.vm.qmp_to_opts(blk1))
1157         self.vm.add_blockdev(self.vm.qmp_to_opts(blk2))
1158         self.vm.launch()
1159
1160     def tearDown(self):
1161         self.vm.shutdown()
1162
1163     def test_no_job_id(self):
1164         self.assert_no_active_block_jobs()
1165
1166         result = self.vm.qmp('blockdev-mirror', device='src', sync='full',
1167                              target='dest')
1168         self.assert_qmp(result, 'error/class', 'GenericError')
1169
1170     def test_success(self):
1171         self.assert_no_active_block_jobs()
1172
1173         result = self.vm.qmp('blockdev-mirror', job_id='job', device='src',
1174                              sync='full', target='dest')
1175         self.assert_qmp(result, 'return', {})
1176
1177         self.complete_and_wait('job')
1178
1179     def test_failing_permissions(self):
1180         self.assert_no_active_block_jobs()
1181
1182         result = self.vm.qmp('blockdev-mirror', device='src', sync='full',
1183                              target='dest-ro')
1184         self.assert_qmp(result, 'error/class', 'GenericError')
1185
1186     def test_failing_permission_in_complete(self):
1187         self.assert_no_active_block_jobs()
1188
1189         # Unshare consistent-read on the target
1190         # (The mirror job does not care)
1191         result = self.vm.qmp('blockdev-add',
1192                              driver='blkdebug',
1193                              node_name='dest-perm',
1194                              image='dest',
1195                              unshare_child_perms=['consistent-read'])
1196         self.assert_qmp(result, 'return', {})
1197
1198         result = self.vm.qmp('blockdev-mirror', job_id='job', device='src',
1199                              sync='full', target='dest',
1200                              filter_node_name='mirror-filter')
1201         self.assert_qmp(result, 'return', {})
1202
1203         # Require consistent-read on the source
1204         # (We can only add this node once the job has started, or it
1205         # will complain that it does not want to run on non-root nodes)
1206         result = self.vm.qmp('blockdev-add',
1207                              driver='blkdebug',
1208                              node_name='src-perm',
1209                              image='src',
1210                              take_child_perms=['consistent-read'])
1211         self.assert_qmp(result, 'return', {})
1212
1213         # While completing, mirror will attempt to replace src by
1214         # dest, which must fail because src-perm requires
1215         # consistent-read but dest-perm does not share it; thus
1216         # aborting the job when it is supposed to complete
1217         self.complete_and_wait('job',
1218                                completion_error='Operation not permitted')
1219
1220         # Assert that all of our nodes are still there (except for the
1221         # mirror filter, which should be gone despite the failure)
1222         nodes = self.vm.qmp('query-named-block-nodes')['return']
1223         nodes = [node['node-name'] for node in nodes]
1224
1225         for expect in ('src', 'src-perm', 'dest', 'dest-perm'):
1226             self.assertTrue(expect in nodes, '%s disappeared' % expect)
1227         self.assertFalse('mirror-filter' in nodes,
1228                          'Mirror filter node did not disappear')
1229
1230 # Test cases for @replaces that do not necessarily involve Quorum
1231 class TestReplaces(iotests.QMPTestCase):
1232     # Each of these test cases needs their own block graph, so do not
1233     # create any nodes here
1234     def setUp(self):
1235         self.vm = iotests.VM()
1236         self.vm.launch()
1237
1238     def tearDown(self):
1239         self.vm.shutdown()
1240         for img in (test_img, target_img):
1241             try:
1242                 os.remove(img)
1243             except OSError:
1244                 pass
1245
1246     @iotests.skip_if_unsupported(['copy-on-read'])
1247     def test_replace_filter(self):
1248         """
1249         Check that we can replace filter nodes.
1250         """
1251         result = self.vm.qmp('blockdev-add', **{
1252                                  'driver': 'copy-on-read',
1253                                  'node-name': 'filter0',
1254                                  'file': {
1255                                      'driver': 'copy-on-read',
1256                                      'node-name': 'filter1',
1257                                      'file': {
1258                                          'driver': 'null-co'
1259                                      }
1260                                  }
1261                              })
1262         self.assert_qmp(result, 'return', {})
1263
1264         result = self.vm.qmp('blockdev-add',
1265                              node_name='target', driver='null-co')
1266         self.assert_qmp(result, 'return', {})
1267
1268         result = self.vm.qmp('blockdev-mirror', job_id='mirror', device='filter0',
1269                              target='target', sync='full', replaces='filter1')
1270         self.assert_qmp(result, 'return', {})
1271
1272         self.complete_and_wait('mirror')
1273
1274         self.vm.assert_block_path('filter0', '/file', 'target')
1275
1276 if __name__ == '__main__':
1277     iotests.main(supported_fmts=['qcow2', 'qed'],
1278                  supported_protocols=['file'],
1279                  supported_platforms=['linux', 'freebsd', 'netbsd', 'openbsd'])