tests/qemu-iotests/030

   1 #!/usr/bin/env python
   2 #
   3 # Tests for image streaming.
   4 #
   5 # Copyright (C) 2012 IBM Corp.
   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 iotests
  24 from iotests import qemu_img, qemu_io
  25
  26 backing_img = os.path.join(iotests.test_dir, 'backing.img')
  27 mid_img = os.path.join(iotests.test_dir, 'mid.img')
  28 test_img = os.path.join(iotests.test_dir, 'test.img')
  29
  30 class TestSingleDrive(iotests.QMPTestCase):
  31     image_len = 1 * 1024 * 1024 # MB
  32
  33     def setUp(self):
  34         iotests.create_image(backing_img, TestSingleDrive.image_len)
  35         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, mid_img)
  36         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % mid_img, test_img)
  37         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 512', backing_img)
  38         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 524288 512', mid_img)
  39         self.vm = iotests.VM().add_drive("blkdebug::" + test_img, "backing.node-name=mid")
  40         self.vm.launch()
  41
  42     def tearDown(self):
  43         self.vm.shutdown()
  44         os.remove(test_img)
  45         os.remove(mid_img)
  46         os.remove(backing_img)
  47
  48     def test_stream(self):
  49         self.assert_no_active_block_jobs()
  50
  51         result = self.vm.qmp('block-stream', device='drive0')
  52         self.assert_qmp(result, 'return', {})
  53
  54         self.wait_until_completed()
  55
  56         self.assert_no_active_block_jobs()
  57         self.vm.shutdown()
  58
  59         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
  60                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
  61                          'image file map does not match backing file after streaming')
  62
  63     def test_stream_intermediate(self):
  64         self.assert_no_active_block_jobs()
  65
  66         self.assertNotEqual(qemu_io('-f', 'raw', '-rU', '-c', 'map', backing_img),
  67                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', mid_img),
  68                             'image file map matches backing file before streaming')
  69
  70         result = self.vm.qmp('block-stream', device='mid', job_id='stream-mid')
  71         self.assert_qmp(result, 'return', {})
  72
  73         self.wait_until_completed(drive='stream-mid')
  74
  75         self.assert_no_active_block_jobs()
  76         self.vm.shutdown()
  77
  78         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
  79                          qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img),
  80                          'image file map does not match backing file after streaming')
  81
  82     def test_stream_pause(self):
  83         self.assert_no_active_block_jobs()
  84
  85         self.vm.pause_drive('drive0')
  86         result = self.vm.qmp('block-stream', device='drive0')
  87         self.assert_qmp(result, 'return', {})
  88
  89         result = self.vm.qmp('block-job-pause', device='drive0')
  90         self.assert_qmp(result, 'return', {})
  91
  92         self.vm.resume_drive('drive0')
  93         self.pause_job('drive0')
  94
  95         result = self.vm.qmp('query-block-jobs')
  96         offset = self.dictpath(result, 'return[0]/offset')
  97
  98         time.sleep(0.5)
  99         result = self.vm.qmp('query-block-jobs')
 100         self.assert_qmp(result, 'return[0]/offset', offset)
 101
 102         result = self.vm.qmp('block-job-resume', device='drive0')
 103         self.assert_qmp(result, 'return', {})
 104
 105         self.wait_until_completed()
 106
 107         self.assert_no_active_block_jobs()
 108         self.vm.shutdown()
 109
 110         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
 111                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 112                          'image file map does not match backing file after streaming')
 113
 114     def test_stream_no_op(self):
 115         self.assert_no_active_block_jobs()
 116
 117         # The image map is empty before the operation
 118         empty_map = qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', test_img)
 119
 120         # This is a no-op: no data should ever be copied from the base image
 121         result = self.vm.qmp('block-stream', device='drive0', base=mid_img)
 122         self.assert_qmp(result, 'return', {})
 123
 124         self.wait_until_completed()
 125
 126         self.assert_no_active_block_jobs()
 127         self.vm.shutdown()
 128
 129         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 130                          empty_map, 'image file map changed after a no-op')
 131
 132     def test_stream_partial(self):
 133         self.assert_no_active_block_jobs()
 134
 135         result = self.vm.qmp('block-stream', device='drive0', base=backing_img)
 136         self.assert_qmp(result, 'return', {})
 137
 138         self.wait_until_completed()
 139
 140         self.assert_no_active_block_jobs()
 141         self.vm.shutdown()
 142
 143         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img),
 144                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 145                          'image file map does not match backing file after streaming')
 146
 147     def test_device_not_found(self):
 148         result = self.vm.qmp('block-stream', device='nonexistent')
 149         self.assert_qmp(result, 'error/class', 'GenericError')
 150
 151     def test_job_id_missing(self):
 152         result = self.vm.qmp('block-stream', device='mid')
 153         self.assert_qmp(result, 'error/class', 'GenericError')
 154
 155
 156 class TestParallelOps(iotests.QMPTestCase):
 157     num_ops = 4 # Number of parallel block-stream operations
 158     num_imgs = num_ops * 2 + 1
 159     image_len = num_ops * 1024 * 1024
 160     imgs = []
 161
 162     def setUp(self):
 163         opts = []
 164         self.imgs = []
 165
 166         # Initialize file names and command-line options
 167         for i in range(self.num_imgs):
 168             img_depth = self.num_imgs - i - 1
 169             opts.append("backing." * img_depth + "node-name=node%d" % i)
 170             self.imgs.append(os.path.join(iotests.test_dir, 'img-%d.img' % i))
 171
 172         # Create all images
 173         iotests.create_image(self.imgs[0], self.image_len)
 174         for i in range(1, self.num_imgs):
 175             qemu_img('create', '-f', iotests.imgfmt,
 176                      '-o', 'backing_file=%s' % self.imgs[i-1], self.imgs[i])
 177
 178         # Put data into the images we are copying data from
 179         for i in range(self.num_imgs / 2):
 180             img_index = i * 2 + 1
 181             # Alternate between 512k and 1M.
 182             # This way jobs will not finish in the same order they were created
 183             num_kb = 512 + 512 * (i % 2)
 184             qemu_io('-f', iotests.imgfmt,
 185                     '-c', 'write -P %d %d %d' % (i, i*1024*1024, num_kb * 1024),
 186                     self.imgs[img_index])
 187
 188         # Attach the drive to the VM
 189         self.vm = iotests.VM()
 190         self.vm.add_drive(self.imgs[-1], ','.join(opts))
 191         self.vm.launch()
 192
 193     def tearDown(self):
 194         self.vm.shutdown()
 195         for img in self.imgs:
 196             os.remove(img)
 197
 198     # Test that it's possible to run several block-stream operations
 199     # in parallel in the same snapshot chain
 200     def test_stream_parallel(self):
 201         self.assert_no_active_block_jobs()
 202
 203         # Check that the maps don't match before the streaming operations
 204         for i in range(2, self.num_imgs, 2):
 205             self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i]),
 206                                 qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i-1]),
 207                                 'image file map matches backing file before streaming')
 208
 209         # Create all streaming jobs
 210         pending_jobs = []
 211         for i in range(2, self.num_imgs, 2):
 212             node_name = 'node%d' % i
 213             job_id = 'stream-%s' % node_name
 214             pending_jobs.append(job_id)
 215             result = self.vm.qmp('block-stream', device=node_name, job_id=job_id, base=self.imgs[i-2], speed=512*1024)
 216             self.assert_qmp(result, 'return', {})
 217
 218         # Wait for all jobs to be finished.
 219         while len(pending_jobs) > 0:
 220             for event in self.vm.get_qmp_events(wait=True):
 221                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 222                     job_id = self.dictpath(event, 'data/device')
 223                     self.assertTrue(job_id in pending_jobs)
 224                     self.assert_qmp_absent(event, 'data/error')
 225                     pending_jobs.remove(job_id)
 226
 227         self.assert_no_active_block_jobs()
 228         self.vm.shutdown()
 229
 230         # Check that all maps match now
 231         for i in range(2, self.num_imgs, 2):
 232             self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]),
 233                              qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]),
 234                              'image file map does not match backing file after streaming')
 235
 236     # Test that it's not possible to perform two block-stream
 237     # operations if there are nodes involved in both.
 238     def test_overlapping_1(self):
 239         self.assert_no_active_block_jobs()
 240
 241         # Set a speed limit to make sure that this job blocks the rest
 242         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4', base=self.imgs[1], speed=1024*1024)
 243         self.assert_qmp(result, 'return', {})
 244
 245         result = self.vm.qmp('block-stream', device='node5', job_id='stream-node5', base=self.imgs[2])
 246         self.assert_qmp(result, 'error/class', 'GenericError')
 247
 248         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3', base=self.imgs[2])
 249         self.assert_qmp(result, 'error/class', 'GenericError')
 250
 251         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4-v2')
 252         self.assert_qmp(result, 'error/class', 'GenericError')
 253
 254         # block-commit should also fail if it touches nodes used by the stream job
 255         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[4], job_id='commit-node4')
 256         self.assert_qmp(result, 'error/class', 'GenericError')
 257
 258         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[1], top=self.imgs[3], job_id='commit-node1')
 259         self.assert_qmp(result, 'error/class', 'GenericError')
 260
 261         # This fails because it needs to modify the backing string in node2, which is blocked
 262         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[0], top=self.imgs[1], job_id='commit-node0')
 263         self.assert_qmp(result, 'error/class', 'GenericError')
 264
 265         self.wait_until_completed(drive='stream-node4')
 266         self.assert_no_active_block_jobs()
 267
 268     # Similar to test_overlapping_1, but with block-commit
 269     # blocking the other jobs
 270     def test_overlapping_2(self):
 271         self.assertLessEqual(9, self.num_imgs)
 272         self.assert_no_active_block_jobs()
 273
 274         # Set a speed limit to make sure that this job blocks the rest
 275         result = self.vm.qmp('block-commit', device='drive0', top=self.imgs[5], base=self.imgs[3], job_id='commit-node3', speed=1024*1024)
 276         self.assert_qmp(result, 'return', {})
 277
 278         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3')
 279         self.assert_qmp(result, 'error/class', 'GenericError')
 280
 281         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[2], job_id='stream-node6')
 282         self.assert_qmp(result, 'error/class', 'GenericError')
 283
 284         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], job_id='stream-node4')
 285         self.assert_qmp(result, 'error/class', 'GenericError')
 286
 287         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[4], job_id='stream-node6-v2')
 288         self.assert_qmp(result, 'error/class', 'GenericError')
 289
 290         # This fails because block-commit currently blocks the active layer even if it's not used
 291         result = self.vm.qmp('block-stream', device='drive0', base=self.imgs[5], job_id='stream-drive0')
 292         self.assert_qmp(result, 'error/class', 'GenericError')
 293
 294         self.wait_until_completed(drive='commit-node3')
 295
 296     # Similar to test_overlapping_2, but here block-commit doesn't use the 'top' parameter.
 297     # Internally this uses a mirror block job, hence the separate test case.
 298     def test_overlapping_3(self):
 299         self.assertLessEqual(8, self.num_imgs)
 300         self.assert_no_active_block_jobs()
 301
 302         # Set a speed limit to make sure that this job blocks the rest
 303         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3], job_id='commit-drive0', speed=1024*1024)
 304         self.assert_qmp(result, 'return', {})
 305
 306         result = self.vm.qmp('block-stream', device='node5', base=self.imgs[3], job_id='stream-node6')
 307         self.assert_qmp(result, 'error/class', 'GenericError')
 308
 309         event = self.vm.get_qmp_event(wait=True)
 310         self.assertEqual(event['event'], 'BLOCK_JOB_READY')
 311         self.assert_qmp(event, 'data/device', 'commit-drive0')
 312         self.assert_qmp(event, 'data/type', 'commit')
 313         self.assert_qmp_absent(event, 'data/error')
 314
 315         result = self.vm.qmp('block-job-complete', device='commit-drive0')
 316         self.assert_qmp(result, 'return', {})
 317
 318         self.wait_until_completed(drive='commit-drive0')
 319
 320     # Test a block-stream and a block-commit job in parallel
 321     def test_stream_commit(self):
 322         self.assertLessEqual(8, self.num_imgs)
 323         self.assert_no_active_block_jobs()
 324
 325         # Stream from node0 into node2
 326         result = self.vm.qmp('block-stream', device='node2', job_id='node2')
 327         self.assert_qmp(result, 'return', {})
 328
 329         # Commit from the active layer into node3
 330         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3])
 331         self.assert_qmp(result, 'return', {})
 332
 333         # Wait for all jobs to be finished.
 334         pending_jobs = ['node2', 'drive0']
 335         while len(pending_jobs) > 0:
 336             for event in self.vm.get_qmp_events(wait=True):
 337                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 338                     node_name = self.dictpath(event, 'data/device')
 339                     self.assertTrue(node_name in pending_jobs)
 340                     self.assert_qmp_absent(event, 'data/error')
 341                     pending_jobs.remove(node_name)
 342                 if event['event'] == 'BLOCK_JOB_READY':
 343                     self.assert_qmp(event, 'data/device', 'drive0')
 344                     self.assert_qmp(event, 'data/type', 'commit')
 345                     self.assert_qmp_absent(event, 'data/error')
 346                     self.assertTrue('drive0' in pending_jobs)
 347                     self.vm.qmp('block-job-complete', device='drive0')
 348
 349         self.assert_no_active_block_jobs()
 350
 351     # Test the base_node parameter
 352     def test_stream_base_node_name(self):
 353         self.assert_no_active_block_jobs()
 354
 355         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[4]),
 356                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[3]),
 357                             'image file map matches backing file before streaming')
 358
 359         # Error: the base node does not exist
 360         result = self.vm.qmp('block-stream', device='node4', base_node='none', job_id='stream')
 361         self.assert_qmp(result, 'error/class', 'GenericError')
 362
 363         # Error: the base node is not a backing file of the top node
 364         result = self.vm.qmp('block-stream', device='node4', base_node='node6', job_id='stream')
 365         self.assert_qmp(result, 'error/class', 'GenericError')
 366
 367         # Error: the base node is the same as the top node
 368         result = self.vm.qmp('block-stream', device='node4', base_node='node4', job_id='stream')
 369         self.assert_qmp(result, 'error/class', 'GenericError')
 370
 371         # Error: cannot specify 'base' and 'base-node' at the same time
 372         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], base_node='node2', job_id='stream')
 373         self.assert_qmp(result, 'error/class', 'GenericError')
 374
 375         # Success: the base node is a backing file of the top node
 376         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='stream')
 377         self.assert_qmp(result, 'return', {})
 378
 379         self.wait_until_completed(drive='stream')
 380
 381         self.assert_no_active_block_jobs()
 382         self.vm.shutdown()
 383
 384         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]),
 385                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]),
 386                          'image file map matches backing file after streaming')
 387
 388 class TestQuorum(iotests.QMPTestCase):
 389     num_children = 3
 390     children = []
 391     backing = []
 392
 393     def setUp(self):
 394         opts = ['driver=quorum', 'vote-threshold=2']
 395
 396         # Initialize file names and command-line options
 397         for i in range(self.num_children):
 398             child_img = os.path.join(iotests.test_dir, 'img-%d.img' % i)
 399             backing_img = os.path.join(iotests.test_dir, 'backing-%d.img' % i)
 400             self.children.append(child_img)
 401             self.backing.append(backing_img)
 402             qemu_img('create', '-f', iotests.imgfmt, backing_img, '1M')
 403             qemu_io('-f', iotests.imgfmt,
 404                     '-c', 'write -P 0x55 0 1024', backing_img)
 405             qemu_img('create', '-f', iotests.imgfmt,
 406                      '-o', 'backing_file=%s' % backing_img, child_img)
 407             opts.append("children.%d.file.filename=%s" % (i, child_img))
 408             opts.append("children.%d.node-name=node%d" % (i, i))
 409
 410         # Attach the drive to the VM
 411         self.vm = iotests.VM()
 412         self.vm.add_drive(path = None, opts = ','.join(opts))
 413         self.vm.launch()
 414
 415     def tearDown(self):
 416         self.vm.shutdown()
 417         for img in self.children:
 418             os.remove(img)
 419         for img in self.backing:
 420             os.remove(img)
 421
 422     def test_stream_quorum(self):
 423         if not iotests.supports_quorum():
 424             return
 425
 426         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.children[0]),
 427                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.backing[0]),
 428                             'image file map matches backing file before streaming')
 429
 430         self.assert_no_active_block_jobs()
 431
 432         result = self.vm.qmp('block-stream', device='node0', job_id='stream-node0')
 433         self.assert_qmp(result, 'return', {})
 434
 435         self.wait_until_completed(drive='stream-node0')
 436
 437         self.assert_no_active_block_jobs()
 438         self.vm.shutdown()
 439
 440         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]),
 441                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]),
 442                          'image file map does not match backing file after streaming')
 443
 444 class TestSmallerBackingFile(iotests.QMPTestCase):
 445     backing_len = 1 * 1024 * 1024 # MB
 446     image_len = 2 * backing_len
 447
 448     def setUp(self):
 449         iotests.create_image(backing_img, self.backing_len)
 450         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img, str(self.image_len))
 451         self.vm = iotests.VM().add_drive(test_img)
 452         self.vm.launch()
 453
 454     # If this hangs, then you are missing a fix to complete streaming when the
 455     # end of the backing file is reached.
 456     def test_stream(self):
 457         self.assert_no_active_block_jobs()
 458
 459         result = self.vm.qmp('block-stream', device='drive0')
 460         self.assert_qmp(result, 'return', {})
 461
 462         self.wait_until_completed()
 463
 464         self.assert_no_active_block_jobs()
 465         self.vm.shutdown()
 466
 467 class TestErrors(iotests.QMPTestCase):
 468     image_len = 2 * 1024 * 1024 # MB
 469
 470     # this should match STREAM_BUFFER_SIZE/512 in block/stream.c
 471     STREAM_BUFFER_SIZE = 512 * 1024
 472
 473     def create_blkdebug_file(self, name, event, errno):
 474         file = open(name, 'w')
 475         file.write('''
 476 [inject-error]
 477 state = "1"
 478 event = "%s"
 479 errno = "%d"
 480 immediately = "off"
 481 once = "on"
 482 sector = "%d"
 483
 484 [set-state]
 485 state = "1"
 486 event = "%s"
 487 new_state = "2"
 488
 489 [set-state]
 490 state = "2"
 491 event = "%s"
 492 new_state = "1"
 493 ''' % (event, errno, self.STREAM_BUFFER_SIZE / 512, event, event))
 494         file.close()
 495
 496 class TestEIO(TestErrors):
 497     def setUp(self):
 498         self.blkdebug_file = backing_img + ".blkdebug"
 499         iotests.create_image(backing_img, TestErrors.image_len)
 500         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 5)
 501         qemu_img('create', '-f', iotests.imgfmt,
 502                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 503                        % (self.blkdebug_file, backing_img),
 504                  test_img)
 505         self.vm = iotests.VM().add_drive(test_img)
 506         self.vm.launch()
 507
 508     def tearDown(self):
 509         self.vm.shutdown()
 510         os.remove(test_img)
 511         os.remove(backing_img)
 512         os.remove(self.blkdebug_file)
 513
 514     def test_report(self):
 515         self.assert_no_active_block_jobs()
 516
 517         result = self.vm.qmp('block-stream', device='drive0')
 518         self.assert_qmp(result, 'return', {})
 519
 520         completed = False
 521         error = False
 522         while not completed:
 523             for event in self.vm.get_qmp_events(wait=True):
 524                 if event['event'] == 'BLOCK_JOB_ERROR':
 525                     self.assert_qmp(event, 'data/device', 'drive0')
 526                     self.assert_qmp(event, 'data/operation', 'read')
 527                     error = True
 528                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 529                     self.assertTrue(error, 'job completed unexpectedly')
 530                     self.assert_qmp(event, 'data/type', 'stream')
 531                     self.assert_qmp(event, 'data/device', 'drive0')
 532                     self.assert_qmp(event, 'data/error', 'Input/output error')
 533                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 534                     self.assert_qmp(event, 'data/len', self.image_len)
 535                     completed = True
 536
 537         self.assert_no_active_block_jobs()
 538         self.vm.shutdown()
 539
 540     def test_ignore(self):
 541         self.assert_no_active_block_jobs()
 542
 543         result = self.vm.qmp('block-stream', device='drive0', on_error='ignore')
 544         self.assert_qmp(result, 'return', {})
 545
 546         error = False
 547         completed = False
 548         while not completed:
 549             for event in self.vm.get_qmp_events(wait=True):
 550                 if event['event'] == 'BLOCK_JOB_ERROR':
 551                     error = True
 552                     self.assert_qmp(event, 'data/device', 'drive0')
 553                     self.assert_qmp(event, 'data/operation', 'read')
 554                     result = self.vm.qmp('query-block-jobs')
 555                     if result == {'return': []}:
 556                         # Job finished too quickly
 557                         continue
 558                     self.assert_qmp(result, 'return[0]/paused', False)
 559                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 560                     self.assertTrue(error, 'job completed unexpectedly')
 561                     self.assert_qmp(event, 'data/type', 'stream')
 562                     self.assert_qmp(event, 'data/device', 'drive0')
 563                     self.assert_qmp(event, 'data/error', 'Input/output error')
 564                     self.assert_qmp(event, 'data/offset', self.image_len)
 565                     self.assert_qmp(event, 'data/len', self.image_len)
 566                     completed = True
 567
 568         self.assert_no_active_block_jobs()
 569         self.vm.shutdown()
 570
 571     def test_stop(self):
 572         self.assert_no_active_block_jobs()
 573
 574         result = self.vm.qmp('block-stream', device='drive0', on_error='stop')
 575         self.assert_qmp(result, 'return', {})
 576
 577         error = False
 578         completed = False
 579         while not completed:
 580             for event in self.vm.get_qmp_events(wait=True):
 581                 if event['event'] == 'BLOCK_JOB_ERROR':
 582                     error = True
 583                     self.assert_qmp(event, 'data/device', 'drive0')
 584                     self.assert_qmp(event, 'data/operation', 'read')
 585
 586                     result = self.vm.qmp('query-block-jobs')
 587                     self.assert_qmp(result, 'return[0]/paused', True)
 588                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 589                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 590
 591                     result = self.vm.qmp('block-job-resume', device='drive0')
 592                     self.assert_qmp(result, 'return', {})
 593
 594                     result = self.vm.qmp('query-block-jobs')
 595                     if result == {'return': []}:
 596                         # Race; likely already finished. Check.
 597                         continue
 598                     self.assert_qmp(result, 'return[0]/paused', False)
 599                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 600                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 601                     self.assertTrue(error, 'job completed unexpectedly')
 602                     self.assert_qmp(event, 'data/type', 'stream')
 603                     self.assert_qmp(event, 'data/device', 'drive0')
 604                     self.assert_qmp_absent(event, 'data/error')
 605                     self.assert_qmp(event, 'data/offset', self.image_len)
 606                     self.assert_qmp(event, 'data/len', self.image_len)
 607                     completed = True
 608
 609         self.assert_no_active_block_jobs()
 610         self.vm.shutdown()
 611
 612     def test_enospc(self):
 613         self.assert_no_active_block_jobs()
 614
 615         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 616         self.assert_qmp(result, 'return', {})
 617
 618         completed = False
 619         error = False
 620         while not completed:
 621             for event in self.vm.get_qmp_events(wait=True):
 622                 if event['event'] == 'BLOCK_JOB_ERROR':
 623                     self.assert_qmp(event, 'data/device', 'drive0')
 624                     self.assert_qmp(event, 'data/operation', 'read')
 625                     error = True
 626                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 627                     self.assertTrue(error, 'job completed unexpectedly')
 628                     self.assert_qmp(event, 'data/type', 'stream')
 629                     self.assert_qmp(event, 'data/device', 'drive0')
 630                     self.assert_qmp(event, 'data/error', 'Input/output error')
 631                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 632                     self.assert_qmp(event, 'data/len', self.image_len)
 633                     completed = True
 634
 635         self.assert_no_active_block_jobs()
 636         self.vm.shutdown()
 637
 638 class TestENOSPC(TestErrors):
 639     def setUp(self):
 640         self.blkdebug_file = backing_img + ".blkdebug"
 641         iotests.create_image(backing_img, TestErrors.image_len)
 642         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 28)
 643         qemu_img('create', '-f', iotests.imgfmt,
 644                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 645                        % (self.blkdebug_file, backing_img),
 646                  test_img)
 647         self.vm = iotests.VM().add_drive(test_img)
 648         self.vm.launch()
 649
 650     def tearDown(self):
 651         self.vm.shutdown()
 652         os.remove(test_img)
 653         os.remove(backing_img)
 654         os.remove(self.blkdebug_file)
 655
 656     def test_enospc(self):
 657         self.assert_no_active_block_jobs()
 658
 659         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 660         self.assert_qmp(result, 'return', {})
 661
 662         error = False
 663         completed = False
 664         while not completed:
 665             for event in self.vm.get_qmp_events(wait=True):
 666                 if event['event'] == 'BLOCK_JOB_ERROR':
 667                     self.assert_qmp(event, 'data/device', 'drive0')
 668                     self.assert_qmp(event, 'data/operation', 'read')
 669                     error = True
 670
 671                     result = self.vm.qmp('query-block-jobs')
 672                     self.assert_qmp(result, 'return[0]/paused', True)
 673                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 674                     self.assert_qmp(result, 'return[0]/io-status', 'nospace')
 675
 676                     result = self.vm.qmp('block-job-resume', device='drive0')
 677                     self.assert_qmp(result, 'return', {})
 678
 679                     result = self.vm.qmp('query-block-jobs')
 680                     if result == {'return': []}:
 681                         # Race; likely already finished. Check.
 682                         continue
 683                     self.assert_qmp(result, 'return[0]/paused', False)
 684                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 685                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 686                     self.assertTrue(error, 'job completed unexpectedly')
 687                     self.assert_qmp(event, 'data/type', 'stream')
 688                     self.assert_qmp(event, 'data/device', 'drive0')
 689                     self.assert_qmp_absent(event, 'data/error')
 690                     self.assert_qmp(event, 'data/offset', self.image_len)
 691                     self.assert_qmp(event, 'data/len', self.image_len)
 692                     completed = True
 693
 694         self.assert_no_active_block_jobs()
 695         self.vm.shutdown()
 696
 697 class TestStreamStop(iotests.QMPTestCase):
 698     image_len = 8 * 1024 * 1024 * 1024 # GB
 699
 700     def setUp(self):
 701         qemu_img('create', backing_img, str(TestStreamStop.image_len))
 702         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 703         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 704         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 705         self.vm = iotests.VM().add_drive("blkdebug::" + test_img)
 706         self.vm.launch()
 707
 708     def tearDown(self):
 709         self.vm.shutdown()
 710         os.remove(test_img)
 711         os.remove(backing_img)
 712
 713     def test_stream_stop(self):
 714         self.assert_no_active_block_jobs()
 715
 716         self.vm.pause_drive('drive0')
 717         result = self.vm.qmp('block-stream', device='drive0')
 718         self.assert_qmp(result, 'return', {})
 719
 720         time.sleep(0.1)
 721         events = self.vm.get_qmp_events(wait=False)
 722         self.assertEqual(events, [], 'unexpected QMP event: %s' % events)
 723
 724         self.cancel_and_wait(resume=True)
 725
 726 class TestSetSpeed(iotests.QMPTestCase):
 727     image_len = 80 * 1024 * 1024 # MB
 728
 729     def setUp(self):
 730         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 731         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 732         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 733         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 734         self.vm = iotests.VM().add_drive('blkdebug::' + test_img)
 735         self.vm.launch()
 736
 737     def tearDown(self):
 738         self.vm.shutdown()
 739         os.remove(test_img)
 740         os.remove(backing_img)
 741
 742     # This is a short performance test which is not run by default.
 743     # Invoke "IMGFMT=qed ./030 TestSetSpeed.perf_test_throughput"
 744     def perf_test_throughput(self):
 745         self.assert_no_active_block_jobs()
 746
 747         result = self.vm.qmp('block-stream', device='drive0')
 748         self.assert_qmp(result, 'return', {})
 749
 750         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 751         self.assert_qmp(result, 'return', {})
 752
 753         self.wait_until_completed()
 754
 755         self.assert_no_active_block_jobs()
 756
 757     def test_set_speed(self):
 758         self.assert_no_active_block_jobs()
 759
 760         self.vm.pause_drive('drive0')
 761         result = self.vm.qmp('block-stream', device='drive0')
 762         self.assert_qmp(result, 'return', {})
 763
 764         # Default speed is 0
 765         result = self.vm.qmp('query-block-jobs')
 766         self.assert_qmp(result, 'return[0]/device', 'drive0')
 767         self.assert_qmp(result, 'return[0]/speed', 0)
 768
 769         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 770         self.assert_qmp(result, 'return', {})
 771
 772         # Ensure the speed we set was accepted
 773         result = self.vm.qmp('query-block-jobs')
 774         self.assert_qmp(result, 'return[0]/device', 'drive0')
 775         self.assert_qmp(result, 'return[0]/speed', 8 * 1024 * 1024)
 776
 777         self.cancel_and_wait(resume=True)
 778         self.vm.pause_drive('drive0')
 779
 780         # Check setting speed in block-stream works
 781         result = self.vm.qmp('block-stream', device='drive0', speed=4 * 1024 * 1024)
 782         self.assert_qmp(result, 'return', {})
 783
 784         result = self.vm.qmp('query-block-jobs')
 785         self.assert_qmp(result, 'return[0]/device', 'drive0')
 786         self.assert_qmp(result, 'return[0]/speed', 4 * 1024 * 1024)
 787
 788         self.cancel_and_wait(resume=True)
 789
 790     def test_set_speed_invalid(self):
 791         self.assert_no_active_block_jobs()
 792
 793         result = self.vm.qmp('block-stream', device='drive0', speed=-1)
 794         self.assert_qmp(result, 'error/class', 'GenericError')
 795
 796         self.assert_no_active_block_jobs()
 797
 798         self.vm.pause_drive('drive0')
 799         result = self.vm.qmp('block-stream', device='drive0')
 800         self.assert_qmp(result, 'return', {})
 801
 802         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=-1)
 803         self.assert_qmp(result, 'error/class', 'GenericError')
 804
 805         self.cancel_and_wait(resume=True)
 806
 807 if __name__ == '__main__':
 808     iotests.main(supported_fmts=['qcow2', 'qed'])