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', '-c', 'map', backing_img),
  67                             qemu_io('-f', iotests.imgfmt, '-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         time.sleep(1)
  93         result = self.vm.qmp('query-block-jobs')
  94         offset = self.dictpath(result, 'return[0]/offset')
  95
  96         time.sleep(1)
  97         result = self.vm.qmp('query-block-jobs')
  98         self.assert_qmp(result, 'return[0]/offset', offset)
  99
 100         result = self.vm.qmp('block-job-resume', device='drive0')
 101         self.assert_qmp(result, 'return', {})
 102
 103         self.vm.resume_drive('drive0')
 104         self.wait_until_completed()
 105
 106         self.assert_no_active_block_jobs()
 107         self.vm.shutdown()
 108
 109         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
 110                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 111                          'image file map does not match backing file after streaming')
 112
 113     def test_stream_no_op(self):
 114         self.assert_no_active_block_jobs()
 115
 116         # The image map is empty before the operation
 117         empty_map = qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img)
 118
 119         # This is a no-op: no data should ever be copied from the base image
 120         result = self.vm.qmp('block-stream', device='drive0', base=mid_img)
 121         self.assert_qmp(result, 'return', {})
 122
 123         self.wait_until_completed()
 124
 125         self.assert_no_active_block_jobs()
 126         self.vm.shutdown()
 127
 128         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 129                          empty_map, 'image file map changed after a no-op')
 130
 131     def test_stream_partial(self):
 132         self.assert_no_active_block_jobs()
 133
 134         result = self.vm.qmp('block-stream', device='drive0', base=backing_img)
 135         self.assert_qmp(result, 'return', {})
 136
 137         self.wait_until_completed()
 138
 139         self.assert_no_active_block_jobs()
 140         self.vm.shutdown()
 141
 142         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img),
 143                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 144                          'image file map does not match backing file after streaming')
 145
 146     def test_device_not_found(self):
 147         result = self.vm.qmp('block-stream', device='nonexistent')
 148         self.assert_qmp(result, 'error/class', 'GenericError')
 149
 150
 151 class TestParallelOps(iotests.QMPTestCase):
 152     num_ops = 4 # Number of parallel block-stream operations
 153     num_imgs = num_ops * 2 + 1
 154     image_len = num_ops * 1024 * 1024
 155     imgs = []
 156
 157     def setUp(self):
 158         opts = []
 159         self.imgs = []
 160
 161         # Initialize file names and command-line options
 162         for i in range(self.num_imgs):
 163             img_depth = self.num_imgs - i - 1
 164             opts.append("backing." * img_depth + "node-name=node%d" % i)
 165             self.imgs.append(os.path.join(iotests.test_dir, 'img-%d.img' % i))
 166
 167         # Create all images
 168         iotests.create_image(self.imgs[0], self.image_len)
 169         for i in range(1, self.num_imgs):
 170             qemu_img('create', '-f', iotests.imgfmt,
 171                      '-o', 'backing_file=%s' % self.imgs[i-1], self.imgs[i])
 172
 173         # Put data into the images we are copying data from
 174         for i in range(self.num_imgs / 2):
 175             img_index = i * 2 + 1
 176             # Alternate between 512k and 1M.
 177             # This way jobs will not finish in the same order they were created
 178             num_kb = 512 + 512 * (i % 2)
 179             qemu_io('-f', iotests.imgfmt,
 180                     '-c', 'write -P %d %d %d' % (i, i*1024*1024, num_kb * 1024),
 181                     self.imgs[img_index])
 182
 183         # Attach the drive to the VM
 184         self.vm = iotests.VM()
 185         self.vm.add_drive(self.imgs[-1], ','.join(opts))
 186         self.vm.launch()
 187
 188     def tearDown(self):
 189         self.vm.shutdown()
 190         for img in self.imgs:
 191             os.remove(img)
 192
 193     # Test that it's possible to run several block-stream operations
 194     # in parallel in the same snapshot chain
 195     def test_stream_parallel(self):
 196         self.assert_no_active_block_jobs()
 197
 198         # Check that the maps don't match before the streaming operations
 199         for i in range(2, self.num_imgs, 2):
 200             self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]),
 201                                 qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]),
 202                                 'image file map matches backing file before streaming')
 203
 204         # Create all streaming jobs
 205         pending_jobs = []
 206         for i in range(2, self.num_imgs, 2):
 207             node_name = 'node%d' % i
 208             job_id = 'stream-%s' % node_name
 209             pending_jobs.append(job_id)
 210             result = self.vm.qmp('block-stream', device=node_name, job_id=job_id, base=self.imgs[i-2], speed=512*1024)
 211             self.assert_qmp(result, 'return', {})
 212
 213         # Wait for all jobs to be finished.
 214         while len(pending_jobs) > 0:
 215             for event in self.vm.get_qmp_events(wait=True):
 216                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 217                     job_id = self.dictpath(event, 'data/device')
 218                     self.assertTrue(job_id in pending_jobs)
 219                     self.assert_qmp_absent(event, 'data/error')
 220                     pending_jobs.remove(job_id)
 221
 222         self.assert_no_active_block_jobs()
 223         self.vm.shutdown()
 224
 225         # Check that all maps match now
 226         for i in range(2, self.num_imgs, 2):
 227             self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]),
 228                              qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]),
 229                              'image file map does not match backing file after streaming')
 230
 231     # Test that it's not possible to perform two block-stream
 232     # operations if there are nodes involved in both.
 233     def test_overlapping_1(self):
 234         self.assert_no_active_block_jobs()
 235
 236         # Set a speed limit to make sure that this job blocks the rest
 237         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4', base=self.imgs[1], speed=1024*1024)
 238         self.assert_qmp(result, 'return', {})
 239
 240         result = self.vm.qmp('block-stream', device='node5', job_id='stream-node5', base=self.imgs[2])
 241         self.assert_qmp(result, 'error/class', 'GenericError')
 242
 243         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3', base=self.imgs[2])
 244         self.assert_qmp(result, 'error/class', 'GenericError')
 245
 246         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4-v2')
 247         self.assert_qmp(result, 'error/class', 'GenericError')
 248
 249         # block-commit should also fail if it touches nodes used by the stream job
 250         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[4], job_id='commit-node4')
 251         self.assert_qmp(result, 'error/class', 'GenericError')
 252
 253         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[1], top=self.imgs[3], job_id='commit-node1')
 254         self.assert_qmp(result, 'error/class', 'GenericError')
 255
 256         # This fails because it needs to modify the backing string in node2, which is blocked
 257         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[0], top=self.imgs[1], job_id='commit-node0')
 258         self.assert_qmp(result, 'error/class', 'GenericError')
 259
 260         self.wait_until_completed(drive='stream-node4')
 261         self.assert_no_active_block_jobs()
 262
 263     # Similar to test_overlapping_1, but with block-commit
 264     # blocking the other jobs
 265     def test_overlapping_2(self):
 266         self.assertLessEqual(9, self.num_imgs)
 267         self.assert_no_active_block_jobs()
 268
 269         # Set a speed limit to make sure that this job blocks the rest
 270         result = self.vm.qmp('block-commit', device='drive0', top=self.imgs[5], base=self.imgs[3], job_id='commit-node3', speed=1024*1024)
 271         self.assert_qmp(result, 'return', {})
 272
 273         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3')
 274         self.assert_qmp(result, 'error/class', 'GenericError')
 275
 276         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[2], job_id='stream-node6')
 277         self.assert_qmp(result, 'error/class', 'GenericError')
 278
 279         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], job_id='stream-node4')
 280         self.assert_qmp(result, 'error/class', 'GenericError')
 281
 282         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[4], job_id='stream-node6-v2')
 283         self.assert_qmp(result, 'error/class', 'GenericError')
 284
 285         # This fails because block-commit needs to block node6, the overlay of the 'top' image
 286         result = self.vm.qmp('block-stream', device='node7', base=self.imgs[5], job_id='stream-node6-v3')
 287         self.assert_qmp(result, 'error/class', 'GenericError')
 288
 289         # This fails because block-commit currently blocks the active layer even if it's not used
 290         result = self.vm.qmp('block-stream', device='drive0', base=self.imgs[5], job_id='stream-drive0')
 291         self.assert_qmp(result, 'error/class', 'GenericError')
 292
 293         self.wait_until_completed(drive='commit-node3')
 294
 295     # Similar to test_overlapping_2, but here block-commit doesn't use the 'top' parameter.
 296     # Internally this uses a mirror block job, hence the separate test case.
 297     def test_overlapping_3(self):
 298         self.assertLessEqual(8, self.num_imgs)
 299         self.assert_no_active_block_jobs()
 300
 301         # Set a speed limit to make sure that this job blocks the rest
 302         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3], job_id='commit-drive0', speed=1024*1024)
 303         self.assert_qmp(result, 'return', {})
 304
 305         result = self.vm.qmp('block-stream', device='node5', base=self.imgs[3], job_id='stream-node6')
 306         self.assert_qmp(result, 'error/class', 'GenericError')
 307
 308         event = self.vm.get_qmp_event(wait=True)
 309         self.assertEqual(event['event'], 'BLOCK_JOB_READY')
 310         self.assert_qmp(event, 'data/device', 'commit-drive0')
 311         self.assert_qmp(event, 'data/type', 'commit')
 312         self.assert_qmp_absent(event, 'data/error')
 313
 314         result = self.vm.qmp('block-job-complete', device='commit-drive0')
 315         self.assert_qmp(result, 'return', {})
 316
 317         self.wait_until_completed(drive='commit-drive0')
 318
 319     # Test a block-stream and a block-commit job in parallel
 320     def test_stream_commit(self):
 321         self.assertLessEqual(8, self.num_imgs)
 322         self.assert_no_active_block_jobs()
 323
 324         # Stream from node0 into node2
 325         result = self.vm.qmp('block-stream', device='node2', job_id='node2')
 326         self.assert_qmp(result, 'return', {})
 327
 328         # Commit from the active layer into node3
 329         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3])
 330         self.assert_qmp(result, 'return', {})
 331
 332         # Wait for all jobs to be finished.
 333         pending_jobs = ['node2', 'drive0']
 334         while len(pending_jobs) > 0:
 335             for event in self.vm.get_qmp_events(wait=True):
 336                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 337                     node_name = self.dictpath(event, 'data/device')
 338                     self.assertTrue(node_name in pending_jobs)
 339                     self.assert_qmp_absent(event, 'data/error')
 340                     pending_jobs.remove(node_name)
 341                 if event['event'] == 'BLOCK_JOB_READY':
 342                     self.assert_qmp(event, 'data/device', 'drive0')
 343                     self.assert_qmp(event, 'data/type', 'commit')
 344                     self.assert_qmp_absent(event, 'data/error')
 345                     self.assertTrue('drive0' in pending_jobs)
 346                     self.vm.qmp('block-job-complete', device='drive0')
 347
 348         self.assert_no_active_block_jobs()
 349
 350     # Test the base_node parameter
 351     def test_stream_base_node_name(self):
 352         self.assert_no_active_block_jobs()
 353
 354         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]),
 355                             qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]),
 356                             'image file map matches backing file before streaming')
 357
 358         # Error: the base node does not exist
 359         result = self.vm.qmp('block-stream', device='node4', base_node='none', job_id='stream')
 360         self.assert_qmp(result, 'error/class', 'GenericError')
 361
 362         # Error: the base node is not a backing file of the top node
 363         result = self.vm.qmp('block-stream', device='node4', base_node='node6', job_id='stream')
 364         self.assert_qmp(result, 'error/class', 'GenericError')
 365
 366         # Error: the base node is the same as the top node
 367         result = self.vm.qmp('block-stream', device='node4', base_node='node4', job_id='stream')
 368         self.assert_qmp(result, 'error/class', 'GenericError')
 369
 370         # Error: cannot specify 'base' and 'base-node' at the same time
 371         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], base_node='node2', job_id='stream')
 372         self.assert_qmp(result, 'error/class', 'GenericError')
 373
 374         # Success: the base node is a backing file of the top node
 375         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='stream')
 376         self.assert_qmp(result, 'return', {})
 377
 378         self.wait_until_completed(drive='stream')
 379
 380         self.assert_no_active_block_jobs()
 381         self.vm.shutdown()
 382
 383         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]),
 384                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]),
 385                          'image file map matches backing file after streaming')
 386
 387 class TestQuorum(iotests.QMPTestCase):
 388     num_children = 3
 389     children = []
 390     backing = []
 391
 392     def setUp(self):
 393         opts = ['driver=quorum', 'vote-threshold=2']
 394
 395         # Initialize file names and command-line options
 396         for i in range(self.num_children):
 397             child_img = os.path.join(iotests.test_dir, 'img-%d.img' % i)
 398             backing_img = os.path.join(iotests.test_dir, 'backing-%d.img' % i)
 399             self.children.append(child_img)
 400             self.backing.append(backing_img)
 401             qemu_img('create', '-f', iotests.imgfmt, backing_img, '1M')
 402             qemu_io('-f', iotests.imgfmt,
 403                     '-c', 'write -P 0x55 0 1024', backing_img)
 404             qemu_img('create', '-f', iotests.imgfmt,
 405                      '-o', 'backing_file=%s' % backing_img, child_img)
 406             opts.append("children.%d.file.filename=%s" % (i, child_img))
 407             opts.append("children.%d.node-name=node%d" % (i, i))
 408
 409         # Attach the drive to the VM
 410         self.vm = iotests.VM()
 411         self.vm.add_drive(path = None, opts = ','.join(opts))
 412         self.vm.launch()
 413
 414     def tearDown(self):
 415         self.vm.shutdown()
 416         for img in self.children:
 417             os.remove(img)
 418         for img in self.backing:
 419             os.remove(img)
 420
 421     def test_stream_quorum(self):
 422         if not iotests.supports_quorum():
 423             return
 424
 425         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]),
 426                             qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]),
 427                             'image file map matches backing file before streaming')
 428
 429         self.assert_no_active_block_jobs()
 430
 431         result = self.vm.qmp('block-stream', device='node0', job_id='stream-node0')
 432         self.assert_qmp(result, 'return', {})
 433
 434         self.wait_until_completed(drive='stream-node0')
 435
 436         self.assert_no_active_block_jobs()
 437         self.vm.shutdown()
 438
 439         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]),
 440                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]),
 441                          'image file map does not match backing file after streaming')
 442
 443 class TestSmallerBackingFile(iotests.QMPTestCase):
 444     backing_len = 1 * 1024 * 1024 # MB
 445     image_len = 2 * backing_len
 446
 447     def setUp(self):
 448         iotests.create_image(backing_img, self.backing_len)
 449         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img, str(self.image_len))
 450         self.vm = iotests.VM().add_drive(test_img)
 451         self.vm.launch()
 452
 453     # If this hangs, then you are missing a fix to complete streaming when the
 454     # end of the backing file is reached.
 455     def test_stream(self):
 456         self.assert_no_active_block_jobs()
 457
 458         result = self.vm.qmp('block-stream', device='drive0')
 459         self.assert_qmp(result, 'return', {})
 460
 461         self.wait_until_completed()
 462
 463         self.assert_no_active_block_jobs()
 464         self.vm.shutdown()
 465
 466 class TestErrors(iotests.QMPTestCase):
 467     image_len = 2 * 1024 * 1024 # MB
 468
 469     # this should match STREAM_BUFFER_SIZE/512 in block/stream.c
 470     STREAM_BUFFER_SIZE = 512 * 1024
 471
 472     def create_blkdebug_file(self, name, event, errno):
 473         file = open(name, 'w')
 474         file.write('''
 475 [inject-error]
 476 state = "1"
 477 event = "%s"
 478 errno = "%d"
 479 immediately = "off"
 480 once = "on"
 481 sector = "%d"
 482
 483 [set-state]
 484 state = "1"
 485 event = "%s"
 486 new_state = "2"
 487
 488 [set-state]
 489 state = "2"
 490 event = "%s"
 491 new_state = "1"
 492 ''' % (event, errno, self.STREAM_BUFFER_SIZE / 512, event, event))
 493         file.close()
 494
 495 class TestEIO(TestErrors):
 496     def setUp(self):
 497         self.blkdebug_file = backing_img + ".blkdebug"
 498         iotests.create_image(backing_img, TestErrors.image_len)
 499         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 5)
 500         qemu_img('create', '-f', iotests.imgfmt,
 501                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 502                        % (self.blkdebug_file, backing_img),
 503                  test_img)
 504         self.vm = iotests.VM().add_drive(test_img)
 505         self.vm.launch()
 506
 507     def tearDown(self):
 508         self.vm.shutdown()
 509         os.remove(test_img)
 510         os.remove(backing_img)
 511         os.remove(self.blkdebug_file)
 512
 513     def test_report(self):
 514         self.assert_no_active_block_jobs()
 515
 516         result = self.vm.qmp('block-stream', device='drive0')
 517         self.assert_qmp(result, 'return', {})
 518
 519         completed = False
 520         error = False
 521         while not completed:
 522             for event in self.vm.get_qmp_events(wait=True):
 523                 if event['event'] == 'BLOCK_JOB_ERROR':
 524                     self.assert_qmp(event, 'data/device', 'drive0')
 525                     self.assert_qmp(event, 'data/operation', 'read')
 526                     error = True
 527                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 528                     self.assertTrue(error, 'job completed unexpectedly')
 529                     self.assert_qmp(event, 'data/type', 'stream')
 530                     self.assert_qmp(event, 'data/device', 'drive0')
 531                     self.assert_qmp(event, 'data/error', 'Input/output error')
 532                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 533                     self.assert_qmp(event, 'data/len', self.image_len)
 534                     completed = True
 535
 536         self.assert_no_active_block_jobs()
 537         self.vm.shutdown()
 538
 539     def test_ignore(self):
 540         self.assert_no_active_block_jobs()
 541
 542         result = self.vm.qmp('block-stream', device='drive0', on_error='ignore')
 543         self.assert_qmp(result, 'return', {})
 544
 545         error = False
 546         completed = False
 547         while not completed:
 548             for event in self.vm.get_qmp_events(wait=True):
 549                 if event['event'] == 'BLOCK_JOB_ERROR':
 550                     error = True
 551                     self.assert_qmp(event, 'data/device', 'drive0')
 552                     self.assert_qmp(event, 'data/operation', 'read')
 553                     result = self.vm.qmp('query-block-jobs')
 554                     if result == {'return': []}:
 555                         # Job finished too quickly
 556                         continue
 557                     self.assert_qmp(result, 'return[0]/paused', False)
 558                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 559                     self.assertTrue(error, 'job completed unexpectedly')
 560                     self.assert_qmp(event, 'data/type', 'stream')
 561                     self.assert_qmp(event, 'data/device', 'drive0')
 562                     self.assert_qmp(event, 'data/error', 'Input/output error')
 563                     self.assert_qmp(event, 'data/offset', self.image_len)
 564                     self.assert_qmp(event, 'data/len', self.image_len)
 565                     completed = True
 566
 567         self.assert_no_active_block_jobs()
 568         self.vm.shutdown()
 569
 570     def test_stop(self):
 571         self.assert_no_active_block_jobs()
 572
 573         result = self.vm.qmp('block-stream', device='drive0', on_error='stop')
 574         self.assert_qmp(result, 'return', {})
 575
 576         error = False
 577         completed = False
 578         while not completed:
 579             for event in self.vm.get_qmp_events(wait=True):
 580                 if event['event'] == 'BLOCK_JOB_ERROR':
 581                     error = True
 582                     self.assert_qmp(event, 'data/device', 'drive0')
 583                     self.assert_qmp(event, 'data/operation', 'read')
 584
 585                     result = self.vm.qmp('query-block-jobs')
 586                     self.assert_qmp(result, 'return[0]/paused', True)
 587                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 588                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 589
 590                     result = self.vm.qmp('block-job-resume', device='drive0')
 591                     self.assert_qmp(result, 'return', {})
 592
 593                     result = self.vm.qmp('query-block-jobs')
 594                     if result == {'return': []}:
 595                         # Race; likely already finished. Check.
 596                         continue
 597                     self.assert_qmp(result, 'return[0]/paused', False)
 598                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 599                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 600                     self.assertTrue(error, 'job completed unexpectedly')
 601                     self.assert_qmp(event, 'data/type', 'stream')
 602                     self.assert_qmp(event, 'data/device', 'drive0')
 603                     self.assert_qmp_absent(event, 'data/error')
 604                     self.assert_qmp(event, 'data/offset', self.image_len)
 605                     self.assert_qmp(event, 'data/len', self.image_len)
 606                     completed = True
 607
 608         self.assert_no_active_block_jobs()
 609         self.vm.shutdown()
 610
 611     def test_enospc(self):
 612         self.assert_no_active_block_jobs()
 613
 614         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 615         self.assert_qmp(result, 'return', {})
 616
 617         completed = False
 618         error = False
 619         while not completed:
 620             for event in self.vm.get_qmp_events(wait=True):
 621                 if event['event'] == 'BLOCK_JOB_ERROR':
 622                     self.assert_qmp(event, 'data/device', 'drive0')
 623                     self.assert_qmp(event, 'data/operation', 'read')
 624                     error = True
 625                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 626                     self.assertTrue(error, 'job completed unexpectedly')
 627                     self.assert_qmp(event, 'data/type', 'stream')
 628                     self.assert_qmp(event, 'data/device', 'drive0')
 629                     self.assert_qmp(event, 'data/error', 'Input/output error')
 630                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 631                     self.assert_qmp(event, 'data/len', self.image_len)
 632                     completed = True
 633
 634         self.assert_no_active_block_jobs()
 635         self.vm.shutdown()
 636
 637 class TestENOSPC(TestErrors):
 638     def setUp(self):
 639         self.blkdebug_file = backing_img + ".blkdebug"
 640         iotests.create_image(backing_img, TestErrors.image_len)
 641         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 28)
 642         qemu_img('create', '-f', iotests.imgfmt,
 643                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 644                        % (self.blkdebug_file, backing_img),
 645                  test_img)
 646         self.vm = iotests.VM().add_drive(test_img)
 647         self.vm.launch()
 648
 649     def tearDown(self):
 650         self.vm.shutdown()
 651         os.remove(test_img)
 652         os.remove(backing_img)
 653         os.remove(self.blkdebug_file)
 654
 655     def test_enospc(self):
 656         self.assert_no_active_block_jobs()
 657
 658         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 659         self.assert_qmp(result, 'return', {})
 660
 661         error = False
 662         completed = False
 663         while not completed:
 664             for event in self.vm.get_qmp_events(wait=True):
 665                 if event['event'] == 'BLOCK_JOB_ERROR':
 666                     self.assert_qmp(event, 'data/device', 'drive0')
 667                     self.assert_qmp(event, 'data/operation', 'read')
 668
 669                     result = self.vm.qmp('query-block-jobs')
 670                     self.assert_qmp(result, 'return[0]/paused', True)
 671                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 672                     self.assert_qmp(result, 'return[0]/io-status', 'nospace')
 673
 674                     result = self.vm.qmp('block-job-resume', device='drive0')
 675                     self.assert_qmp(result, 'return', {})
 676
 677                     result = self.vm.qmp('query-block-jobs')
 678                     self.assert_qmp(result, 'return[0]/paused', False)
 679                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 680                     error = True
 681                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 682                     self.assertTrue(error, 'job completed unexpectedly')
 683                     self.assert_qmp(event, 'data/type', 'stream')
 684                     self.assert_qmp(event, 'data/device', 'drive0')
 685                     self.assert_qmp_absent(event, 'data/error')
 686                     self.assert_qmp(event, 'data/offset', self.image_len)
 687                     self.assert_qmp(event, 'data/len', self.image_len)
 688                     completed = True
 689
 690         self.assert_no_active_block_jobs()
 691         self.vm.shutdown()
 692
 693 class TestStreamStop(iotests.QMPTestCase):
 694     image_len = 8 * 1024 * 1024 * 1024 # GB
 695
 696     def setUp(self):
 697         qemu_img('create', backing_img, str(TestStreamStop.image_len))
 698         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 699         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 700         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 701         self.vm = iotests.VM().add_drive("blkdebug::" + test_img)
 702         self.vm.launch()
 703
 704     def tearDown(self):
 705         self.vm.shutdown()
 706         os.remove(test_img)
 707         os.remove(backing_img)
 708
 709     def test_stream_stop(self):
 710         self.assert_no_active_block_jobs()
 711
 712         self.vm.pause_drive('drive0')
 713         result = self.vm.qmp('block-stream', device='drive0')
 714         self.assert_qmp(result, 'return', {})
 715
 716         time.sleep(0.1)
 717         events = self.vm.get_qmp_events(wait=False)
 718         self.assertEqual(events, [], 'unexpected QMP event: %s' % events)
 719
 720         self.cancel_and_wait(resume=True)
 721
 722 class TestSetSpeed(iotests.QMPTestCase):
 723     image_len = 80 * 1024 * 1024 # MB
 724
 725     def setUp(self):
 726         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 727         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 728         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
 729         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 730         self.vm = iotests.VM().add_drive('blkdebug::' + test_img)
 731         self.vm.launch()
 732
 733     def tearDown(self):
 734         self.vm.shutdown()
 735         os.remove(test_img)
 736         os.remove(backing_img)
 737
 738     # This is a short performance test which is not run by default.
 739     # Invoke "IMGFMT=qed ./030 TestSetSpeed.perf_test_throughput"
 740     def perf_test_throughput(self):
 741         self.assert_no_active_block_jobs()
 742
 743         result = self.vm.qmp('block-stream', device='drive0')
 744         self.assert_qmp(result, 'return', {})
 745
 746         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 747         self.assert_qmp(result, 'return', {})
 748
 749         self.wait_until_completed()
 750
 751         self.assert_no_active_block_jobs()
 752
 753     def test_set_speed(self):
 754         self.assert_no_active_block_jobs()
 755
 756         self.vm.pause_drive('drive0')
 757         result = self.vm.qmp('block-stream', device='drive0')
 758         self.assert_qmp(result, 'return', {})
 759
 760         # Default speed is 0
 761         result = self.vm.qmp('query-block-jobs')
 762         self.assert_qmp(result, 'return[0]/device', 'drive0')
 763         self.assert_qmp(result, 'return[0]/speed', 0)
 764
 765         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 766         self.assert_qmp(result, 'return', {})
 767
 768         # Ensure the speed we set was accepted
 769         result = self.vm.qmp('query-block-jobs')
 770         self.assert_qmp(result, 'return[0]/device', 'drive0')
 771         self.assert_qmp(result, 'return[0]/speed', 8 * 1024 * 1024)
 772
 773         self.cancel_and_wait(resume=True)
 774         self.vm.pause_drive('drive0')
 775
 776         # Check setting speed in block-stream works
 777         result = self.vm.qmp('block-stream', device='drive0', speed=4 * 1024 * 1024)
 778         self.assert_qmp(result, 'return', {})
 779
 780         result = self.vm.qmp('query-block-jobs')
 781         self.assert_qmp(result, 'return[0]/device', 'drive0')
 782         self.assert_qmp(result, 'return[0]/speed', 4 * 1024 * 1024)
 783
 784         self.cancel_and_wait(resume=True)
 785
 786     def test_set_speed_invalid(self):
 787         self.assert_no_active_block_jobs()
 788
 789         result = self.vm.qmp('block-stream', device='drive0', speed=-1)
 790         self.assert_qmp(result, 'error/class', 'GenericError')
 791
 792         self.assert_no_active_block_jobs()
 793
 794         result = self.vm.qmp('block-stream', device='drive0')
 795         self.assert_qmp(result, 'return', {})
 796
 797         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=-1)
 798         self.assert_qmp(result, 'error/class', 'GenericError')
 799
 800         self.cancel_and_wait()
 801
 802 if __name__ == '__main__':
 803     iotests.main(supported_fmts=['qcow2', 'qed'])