tests/qemu-iotests/030

   1 #!/usr/bin/env python3
   2 # group: rw backing
   3 #
   4 # Tests for image streaming.
   5 #
   6 # Copyright (C) 2012 IBM Corp.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 import time
  23 import os
  24 import iotests
  25 import unittest
  26 from iotests import qemu_img, qemu_io
  27
  28 backing_img = os.path.join(iotests.test_dir, 'backing.img')
  29 mid_img = os.path.join(iotests.test_dir, 'mid.img')
  30 test_img = os.path.join(iotests.test_dir, 'test.img')
  31
  32 class TestSingleDrive(iotests.QMPTestCase):
  33     image_len = 1 * 1024 * 1024 # MB
  34
  35     def setUp(self):
  36         iotests.create_image(backing_img, TestSingleDrive.image_len)
  37         qemu_img('create', '-f', iotests.imgfmt,
  38                  '-o', 'backing_file=%s' % backing_img,
  39                  '-F', 'raw', mid_img)
  40         qemu_img('create', '-f', iotests.imgfmt,
  41                  '-o', 'backing_file=%s' % mid_img,
  42                  '-F', iotests.imgfmt, test_img)
  43         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 512', backing_img)
  44         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 524288 512', mid_img)
  45         self.vm = iotests.VM().add_drive("blkdebug::" + test_img,
  46                                          "backing.node-name=mid," +
  47                                          "backing.backing.node-name=base")
  48         self.vm.launch()
  49
  50     def tearDown(self):
  51         self.vm.shutdown()
  52         os.remove(test_img)
  53         os.remove(mid_img)
  54         os.remove(backing_img)
  55
  56     def test_stream(self):
  57         self.assert_no_active_block_jobs()
  58
  59         result = self.vm.qmp('block-stream', device='drive0')
  60         self.assert_qmp(result, 'return', {})
  61
  62         self.wait_until_completed()
  63
  64         self.assert_no_active_block_jobs()
  65         self.vm.shutdown()
  66
  67         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
  68                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
  69                          'image file map does not match backing file after streaming')
  70
  71     def test_stream_intermediate(self):
  72         self.assert_no_active_block_jobs()
  73
  74         self.assertNotEqual(qemu_io('-f', 'raw', '-rU', '-c', 'map', backing_img),
  75                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', mid_img),
  76                             'image file map matches backing file before streaming')
  77
  78         result = self.vm.qmp('block-stream', device='mid', job_id='stream-mid')
  79         self.assert_qmp(result, 'return', {})
  80
  81         self.wait_until_completed(drive='stream-mid')
  82
  83         self.assert_no_active_block_jobs()
  84         self.vm.shutdown()
  85
  86         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
  87                          qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img),
  88                          'image file map does not match backing file after streaming')
  89
  90     def test_stream_pause(self):
  91         self.assert_no_active_block_jobs()
  92
  93         self.vm.pause_drive('drive0')
  94         result = self.vm.qmp('block-stream', device='drive0')
  95         self.assert_qmp(result, 'return', {})
  96
  97         self.pause_job('drive0', wait=False)
  98         self.vm.resume_drive('drive0')
  99         self.pause_wait('drive0')
 100
 101         result = self.vm.qmp('query-block-jobs')
 102         offset = self.dictpath(result, 'return[0]/offset')
 103
 104         time.sleep(0.5)
 105         result = self.vm.qmp('query-block-jobs')
 106         self.assert_qmp(result, 'return[0]/offset', offset)
 107
 108         result = self.vm.qmp('block-job-resume', device='drive0')
 109         self.assert_qmp(result, 'return', {})
 110
 111         self.wait_until_completed()
 112
 113         self.assert_no_active_block_jobs()
 114         self.vm.shutdown()
 115
 116         self.assertEqual(qemu_io('-f', 'raw', '-c', 'map', backing_img),
 117                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 118                          'image file map does not match backing file after streaming')
 119
 120     def test_stream_no_op(self):
 121         self.assert_no_active_block_jobs()
 122
 123         # The image map is empty before the operation
 124         empty_map = qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', test_img)
 125
 126         # This is a no-op: no data should ever be copied from the base image
 127         result = self.vm.qmp('block-stream', device='drive0', base=mid_img)
 128         self.assert_qmp(result, 'return', {})
 129
 130         self.wait_until_completed()
 131
 132         self.assert_no_active_block_jobs()
 133         self.vm.shutdown()
 134
 135         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 136                          empty_map, 'image file map changed after a no-op')
 137
 138     def test_stream_partial(self):
 139         self.assert_no_active_block_jobs()
 140
 141         result = self.vm.qmp('block-stream', device='drive0', base=backing_img)
 142         self.assert_qmp(result, 'return', {})
 143
 144         self.wait_until_completed()
 145
 146         self.assert_no_active_block_jobs()
 147         self.vm.shutdown()
 148
 149         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', mid_img),
 150                          qemu_io('-f', iotests.imgfmt, '-c', 'map', test_img),
 151                          'image file map does not match backing file after streaming')
 152
 153     def test_device_not_found(self):
 154         result = self.vm.qmp('block-stream', device='nonexistent')
 155         self.assert_qmp(result, 'error/desc',
 156             'Cannot find device=\'nonexistent\' nor node-name=\'nonexistent\'')
 157
 158     def test_job_id_missing(self):
 159         result = self.vm.qmp('block-stream', device='mid')
 160         self.assert_qmp(result, 'error/desc', "Invalid job ID ''")
 161
 162     def test_read_only(self):
 163         # Create a new file that we can attach (we need a read-only top)
 164         with iotests.FilePath('ro-top.img') as ro_top_path:
 165             qemu_img('create', '-f', iotests.imgfmt, ro_top_path,
 166                      str(self.image_len))
 167
 168             result = self.vm.qmp('blockdev-add',
 169                                  node_name='ro-top',
 170                                  driver=iotests.imgfmt,
 171                                  read_only=True,
 172                                  file={
 173                                      'driver': 'file',
 174                                      'filename': ro_top_path,
 175                                      'read-only': True
 176                                  },
 177                                  backing='mid')
 178             self.assert_qmp(result, 'return', {})
 179
 180             result = self.vm.qmp('block-stream', job_id='stream',
 181                                  device='ro-top', base_node='base')
 182             self.assert_qmp(result, 'error/desc', 'Block node is read-only')
 183
 184             result = self.vm.qmp('blockdev-del', node_name='ro-top')
 185             self.assert_qmp(result, 'return', {})
 186
 187
 188 class TestParallelOps(iotests.QMPTestCase):
 189     num_ops = 4 # Number of parallel block-stream operations
 190     num_imgs = num_ops * 2 + 1
 191     image_len = num_ops * 4 * 1024 * 1024
 192     imgs = []
 193
 194     def setUp(self):
 195         opts = []
 196         self.imgs = []
 197
 198         # Initialize file names and command-line options
 199         for i in range(self.num_imgs):
 200             img_depth = self.num_imgs - i - 1
 201             opts.append("backing." * img_depth + "node-name=node%d" % i)
 202             self.imgs.append(os.path.join(iotests.test_dir, 'img-%d.img' % i))
 203
 204         # Create all images
 205         iotests.create_image(self.imgs[0], self.image_len)
 206         for i in range(1, self.num_imgs):
 207             qemu_img('create', '-f', iotests.imgfmt,
 208                      '-o', 'backing_file=%s' % self.imgs[i-1],
 209                      '-F', 'raw' if i == 1 else iotests.imgfmt, self.imgs[i])
 210
 211         # Put data into the images we are copying data from
 212         odd_img_indexes = [x for x in reversed(range(self.num_imgs)) if x % 2 == 1]
 213         for i in range(len(odd_img_indexes)):
 214             # Alternate between 2MB and 4MB.
 215             # This way jobs will not finish in the same order they were created
 216             num_mb = 2 + 2 * (i % 2)
 217             qemu_io('-f', iotests.imgfmt,
 218                     '-c', 'write -P 0xFF %dM %dM' % (i * 4, num_mb),
 219                     self.imgs[odd_img_indexes[i]])
 220
 221         # Attach the drive to the VM
 222         self.vm = iotests.VM()
 223         self.vm.add_drive(self.imgs[-1], ','.join(opts))
 224         self.vm.launch()
 225
 226     def tearDown(self):
 227         self.vm.shutdown()
 228         for img in self.imgs:
 229             os.remove(img)
 230
 231     # Test that it's possible to run several block-stream operations
 232     # in parallel in the same snapshot chain
 233     @unittest.skipIf(os.environ.get('QEMU_CHECK_BLOCK_AUTO'), 'disabled in CI')
 234     def test_stream_parallel(self):
 235         self.assert_no_active_block_jobs()
 236
 237         # Check that the maps don't match before the streaming operations
 238         for i in range(2, self.num_imgs, 2):
 239             self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i]),
 240                                 qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[i-1]),
 241                                 'image file map matches backing file before streaming')
 242
 243         # Create all streaming jobs
 244         pending_jobs = []
 245         for i in range(2, self.num_imgs, 2):
 246             node_name = 'node%d' % i
 247             job_id = 'stream-%s' % node_name
 248             pending_jobs.append(job_id)
 249             result = self.vm.qmp('block-stream', device=node_name,
 250                                  job_id=job_id, bottom=f'node{i-1}',
 251                                  speed=1024)
 252             self.assert_qmp(result, 'return', {})
 253
 254         # Do this in reverse: After unthrottling them, some jobs may finish
 255         # before we have unthrottled all of them.  This will drain their
 256         # subgraph, and this will make jobs above them advance (despite those
 257         # jobs on top being throttled).  In the worst case, all jobs below the
 258         # top one are finished before we can unthrottle it, and this makes it
 259         # advance so far that it completes before we can unthrottle it - which
 260         # results in an error.
 261         # Starting from the top (i.e. in reverse) does not have this problem:
 262         # When a job finishes, the ones below it are not advanced.
 263         for job in reversed(pending_jobs):
 264             result = self.vm.qmp('block-job-set-speed', device=job, speed=0)
 265             self.assert_qmp(result, 'return', {})
 266
 267         # Wait for all jobs to be finished.
 268         while len(pending_jobs) > 0:
 269             for event in self.vm.get_qmp_events(wait=True):
 270                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 271                     job_id = self.dictpath(event, 'data/device')
 272                     self.assertTrue(job_id in pending_jobs)
 273                     self.assert_qmp_absent(event, 'data/error')
 274                     pending_jobs.remove(job_id)
 275
 276         self.assert_no_active_block_jobs()
 277         self.vm.shutdown()
 278
 279         # Check that all maps match now
 280         for i in range(2, self.num_imgs, 2):
 281             self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]),
 282                              qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]),
 283                              'image file map does not match backing file after streaming')
 284
 285     # Test that it's not possible to perform two block-stream
 286     # operations if there are nodes involved in both.
 287     def test_overlapping_1(self):
 288         self.assert_no_active_block_jobs()
 289
 290         # Set a speed limit to make sure that this job blocks the rest
 291         result = self.vm.qmp('block-stream', device='node4',
 292                              job_id='stream-node4', base=self.imgs[1],
 293                              filter_node_name='stream-filter', speed=1024*1024)
 294         self.assert_qmp(result, 'return', {})
 295
 296         result = self.vm.qmp('block-stream', device='node5', job_id='stream-node5', base=self.imgs[2])
 297         self.assert_qmp(result, 'error/desc',
 298             "Node 'stream-filter' is busy: block device is in use by block job: stream")
 299
 300         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3', base=self.imgs[2])
 301         self.assert_qmp(result, 'error/desc',
 302             "Node 'node3' is busy: block device is in use by block job: stream")
 303
 304         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4-v2')
 305         self.assert_qmp(result, 'error/desc',
 306             "Node 'node4' is busy: block device is in use by block job: stream")
 307
 308         # block-commit should also fail if it touches nodes used by the stream job
 309         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[4], job_id='commit-node4')
 310         self.assert_qmp(result, 'error/desc',
 311             "Node 'stream-filter' is busy: block device is in use by block job: stream")
 312
 313         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[1], top=self.imgs[3], job_id='commit-node1')
 314         self.assert_qmp(result, 'error/desc',
 315             "Node 'node3' is busy: block device is in use by block job: stream")
 316
 317         # This fails because it needs to modify the backing string in node2, which is blocked
 318         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[0], top=self.imgs[1], job_id='commit-node0')
 319         self.assert_qmp(result, 'error/desc',
 320             "Node 'node2' is busy: block device is in use by block job: stream")
 321
 322         result = self.vm.qmp('block-job-set-speed', device='stream-node4', speed=0)
 323         self.assert_qmp(result, 'return', {})
 324
 325         self.wait_until_completed(drive='stream-node4')
 326         self.assert_no_active_block_jobs()
 327
 328     # Similar to test_overlapping_1, but with block-commit
 329     # blocking the other jobs
 330     def test_overlapping_2(self):
 331         self.assertLessEqual(9, self.num_imgs)
 332         self.assert_no_active_block_jobs()
 333
 334         # Set a speed limit to make sure that this job blocks the rest
 335         result = self.vm.qmp('block-commit', device='drive0', top=self.imgs[5], base=self.imgs[3], job_id='commit-node3', speed=1024*1024)
 336         self.assert_qmp(result, 'return', {})
 337
 338         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3')
 339         self.assert_qmp(result, 'error/desc',
 340             "Node 'node3' is busy: block device is in use by block job: commit")
 341
 342         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[2], job_id='stream-node6')
 343         self.assert_qmp(result, 'error/desc',
 344             "Node 'node5' is busy: block device is in use by block job: commit")
 345
 346         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], job_id='stream-node4')
 347         self.assert_qmp(result, 'error/desc',
 348             "Node 'node4' is busy: block device is in use by block job: commit")
 349
 350         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[4], job_id='stream-node6-v2')
 351         self.assert_qmp(result, 'error/desc',
 352             "Node 'node5' is busy: block device is in use by block job: commit")
 353
 354         # This fails because block-commit currently blocks the active layer even if it's not used
 355         result = self.vm.qmp('block-stream', device='drive0', base=self.imgs[5], job_id='stream-drive0')
 356         self.assert_qmp(result, 'error/desc',
 357             "Node 'drive0' is busy: block device is in use by block job: commit")
 358
 359         result = self.vm.qmp('block-job-set-speed', device='commit-node3', speed=0)
 360         self.assert_qmp(result, 'return', {})
 361
 362         self.wait_until_completed(drive='commit-node3')
 363
 364     # Similar to test_overlapping_2, but here block-commit doesn't use the 'top' parameter.
 365     # Internally this uses a mirror block job, hence the separate test case.
 366     def test_overlapping_3(self):
 367         self.assertLessEqual(8, self.num_imgs)
 368         self.assert_no_active_block_jobs()
 369
 370         # Set a speed limit to make sure that this job blocks the rest
 371         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3], job_id='commit-drive0', speed=1024*1024)
 372         self.assert_qmp(result, 'return', {})
 373
 374         result = self.vm.qmp('block-stream', device='node5', base=self.imgs[3], job_id='stream-node6')
 375         self.assert_qmp(result, 'error/desc',
 376             "Node 'node5' is busy: block device is in use by block job: commit")
 377
 378         result = self.vm.qmp('block-job-set-speed', device='commit-drive0', speed=0)
 379         self.assert_qmp(result, 'return', {})
 380
 381         event = self.vm.event_wait(name='BLOCK_JOB_READY')
 382         self.assert_qmp(event, 'data/device', 'commit-drive0')
 383         self.assert_qmp(event, 'data/type', 'commit')
 384         self.assert_qmp_absent(event, 'data/error')
 385
 386         result = self.vm.qmp('block-job-complete', device='commit-drive0')
 387         self.assert_qmp(result, 'return', {})
 388
 389         self.wait_until_completed(drive='commit-drive0')
 390
 391     # In this case the base node of the stream job is the same as the
 392     # top node of commit job. Since this results in the commit filter
 393     # node being part of the stream chain, this is not allowed.
 394     def test_overlapping_4(self):
 395         self.assert_no_active_block_jobs()
 396
 397         # Commit from node2 into node0
 398         result = self.vm.qmp('block-commit', device='drive0',
 399                              top=self.imgs[2], base=self.imgs[0],
 400                              filter_node_name='commit-filter', speed=1024*1024)
 401         self.assert_qmp(result, 'return', {})
 402
 403         # Stream from node2 into node4
 404         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='node4')
 405         self.assert_qmp(result, 'error/desc',
 406             "Cannot freeze 'backing' link to 'commit-filter'")
 407
 408         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
 409         self.assert_qmp(result, 'return', {})
 410
 411         self.wait_until_completed()
 412         self.assert_no_active_block_jobs()
 413
 414     # In this case the base node of the stream job is the commit job's
 415     # filter node.  stream does not have a real dependency on its base
 416     # node, so even though commit removes it when it is done, there is
 417     # no conflict.
 418     def test_overlapping_5(self):
 419         self.assert_no_active_block_jobs()
 420
 421         # Commit from node2 into node0
 422         result = self.vm.qmp('block-commit', device='drive0',
 423                              top_node='node2', base_node='node0',
 424                              filter_node_name='commit-filter', speed=1024*1024)
 425         self.assert_qmp(result, 'return', {})
 426
 427         # Stream from node2 into node4
 428         result = self.vm.qmp('block-stream', device='node4',
 429                              base_node='commit-filter', job_id='node4')
 430         self.assert_qmp(result, 'return', {})
 431
 432         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
 433         self.assert_qmp(result, 'return', {})
 434
 435         self.vm.run_job(job='drive0', auto_dismiss=True)
 436         self.vm.run_job(job='node4', auto_dismiss=True)
 437         self.assert_no_active_block_jobs()
 438
 439     # Test a block-stream and a block-commit job in parallel
 440     # Here the stream job is supposed to finish quickly in order to reproduce
 441     # the scenario that triggers the bug fixed in 3d5d319e1221 and 1a63a907507
 442     def test_stream_commit_1(self):
 443         self.assertLessEqual(8, self.num_imgs)
 444         self.assert_no_active_block_jobs()
 445
 446         # Stream from node0 into node2
 447         result = self.vm.qmp('block-stream', device='node2', base_node='node0', job_id='node2')
 448         self.assert_qmp(result, 'return', {})
 449
 450         # Commit from the active layer into node3
 451         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3])
 452         self.assert_qmp(result, 'return', {})
 453
 454         # Wait for all jobs to be finished.
 455         pending_jobs = ['node2', 'drive0']
 456         while len(pending_jobs) > 0:
 457             for event in self.vm.get_qmp_events(wait=True):
 458                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 459                     node_name = self.dictpath(event, 'data/device')
 460                     self.assertTrue(node_name in pending_jobs)
 461                     self.assert_qmp_absent(event, 'data/error')
 462                     pending_jobs.remove(node_name)
 463                 if event['event'] == 'BLOCK_JOB_READY':
 464                     self.assert_qmp(event, 'data/device', 'drive0')
 465                     self.assert_qmp(event, 'data/type', 'commit')
 466                     self.assert_qmp_absent(event, 'data/error')
 467                     self.assertTrue('drive0' in pending_jobs)
 468                     self.vm.qmp('block-job-complete', device='drive0')
 469
 470         self.assert_no_active_block_jobs()
 471
 472     # This is similar to test_stream_commit_1 but both jobs are slowed
 473     # down so they can run in parallel for a little while.
 474     def test_stream_commit_2(self):
 475         self.assertLessEqual(8, self.num_imgs)
 476         self.assert_no_active_block_jobs()
 477
 478         # Stream from node0 into node4
 479         result = self.vm.qmp('block-stream', device='node4', base_node='node0', job_id='node4', speed=1024*1024)
 480         self.assert_qmp(result, 'return', {})
 481
 482         # Commit from the active layer into node5
 483         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[5], speed=1024*1024)
 484         self.assert_qmp(result, 'return', {})
 485
 486         for job in ['drive0', 'node4']:
 487             result = self.vm.qmp('block-job-set-speed', device=job, speed=0)
 488             self.assert_qmp(result, 'return', {})
 489
 490         # Wait for all jobs to be finished.
 491         pending_jobs = ['node4', 'drive0']
 492         while len(pending_jobs) > 0:
 493             for event in self.vm.get_qmp_events(wait=True):
 494                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 495                     node_name = self.dictpath(event, 'data/device')
 496                     self.assertTrue(node_name in pending_jobs)
 497                     self.assert_qmp_absent(event, 'data/error')
 498                     pending_jobs.remove(node_name)
 499                 if event['event'] == 'BLOCK_JOB_READY':
 500                     self.assert_qmp(event, 'data/device', 'drive0')
 501                     self.assert_qmp(event, 'data/type', 'commit')
 502                     self.assert_qmp_absent(event, 'data/error')
 503                     self.assertTrue('drive0' in pending_jobs)
 504                     self.vm.qmp('block-job-complete', device='drive0')
 505
 506         self.assert_no_active_block_jobs()
 507
 508     # Test the base_node parameter
 509     def test_stream_base_node_name(self):
 510         self.assert_no_active_block_jobs()
 511
 512         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[4]),
 513                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[3]),
 514                             'image file map matches backing file before streaming')
 515
 516         # Error: the base node does not exist
 517         result = self.vm.qmp('block-stream', device='node4', base_node='none', job_id='stream')
 518         self.assert_qmp(result, 'error/desc',
 519             'Cannot find device=\'\' nor node-name=\'none\'')
 520
 521         # Error: the base node is not a backing file of the top node
 522         result = self.vm.qmp('block-stream', device='node4', base_node='node6', job_id='stream')
 523         self.assert_qmp(result, 'error/desc',
 524             "Node 'node6' is not a backing image of 'node4'")
 525
 526         # Error: the base node is the same as the top node
 527         result = self.vm.qmp('block-stream', device='node4', base_node='node4', job_id='stream')
 528         self.assert_qmp(result, 'error/desc',
 529             "Node 'node4' is not a backing image of 'node4'")
 530
 531         # Error: cannot specify 'base' and 'base-node' at the same time
 532         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], base_node='node2', job_id='stream')
 533         self.assert_qmp(result, 'error/desc',
 534             "'base' and 'base-node' cannot be specified at the same time")
 535
 536         # Success: the base node is a backing file of the top node
 537         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='stream')
 538         self.assert_qmp(result, 'return', {})
 539
 540         self.wait_until_completed(drive='stream')
 541
 542         self.assert_no_active_block_jobs()
 543         self.vm.shutdown()
 544
 545         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]),
 546                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]),
 547                          'image file map matches backing file after streaming')
 548
 549 class TestQuorum(iotests.QMPTestCase):
 550     num_children = 3
 551     children = []
 552     backing = []
 553
 554     @iotests.skip_if_unsupported(['quorum'])
 555     def setUp(self):
 556         opts = ['driver=quorum', 'vote-threshold=2']
 557
 558         # Initialize file names and command-line options
 559         for i in range(self.num_children):
 560             child_img = os.path.join(iotests.test_dir, 'img-%d.img' % i)
 561             backing_img = os.path.join(iotests.test_dir, 'backing-%d.img' % i)
 562             self.children.append(child_img)
 563             self.backing.append(backing_img)
 564             qemu_img('create', '-f', iotests.imgfmt, backing_img, '1M')
 565             qemu_io('-f', iotests.imgfmt,
 566                     '-c', 'write -P 0x55 0 1024', backing_img)
 567             qemu_img('create', '-f', iotests.imgfmt,
 568                      '-o', 'backing_file=%s' % backing_img,
 569                      '-F', iotests.imgfmt, child_img)
 570             opts.append("children.%d.file.filename=%s" % (i, child_img))
 571             opts.append("children.%d.node-name=node%d" % (i, i))
 572
 573         # Attach the drive to the VM
 574         self.vm = iotests.VM()
 575         self.vm.add_drive(path = None, opts = ','.join(opts))
 576         self.vm.launch()
 577
 578     def tearDown(self):
 579         self.vm.shutdown()
 580         for img in self.children:
 581             os.remove(img)
 582         for img in self.backing:
 583             os.remove(img)
 584
 585     def test_stream_quorum(self):
 586         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.children[0]),
 587                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.backing[0]),
 588                             'image file map matches backing file before streaming')
 589
 590         self.assert_no_active_block_jobs()
 591
 592         result = self.vm.qmp('block-stream', device='node0', job_id='stream-node0')
 593         self.assert_qmp(result, 'return', {})
 594
 595         self.wait_until_completed(drive='stream-node0')
 596
 597         self.assert_no_active_block_jobs()
 598         self.vm.shutdown()
 599
 600         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]),
 601                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]),
 602                          'image file map does not match backing file after streaming')
 603
 604 class TestSmallerBackingFile(iotests.QMPTestCase):
 605     backing_len = 1 * 1024 * 1024 # MB
 606     image_len = 2 * backing_len
 607
 608     def setUp(self):
 609         iotests.create_image(backing_img, self.backing_len)
 610         qemu_img('create', '-f', iotests.imgfmt,
 611                  '-o', 'backing_file=%s' % backing_img,
 612                  '-F', 'raw', test_img, str(self.image_len))
 613         self.vm = iotests.VM().add_drive(test_img)
 614         self.vm.launch()
 615
 616     # If this hangs, then you are missing a fix to complete streaming when the
 617     # end of the backing file is reached.
 618     def test_stream(self):
 619         self.assert_no_active_block_jobs()
 620
 621         result = self.vm.qmp('block-stream', device='drive0')
 622         self.assert_qmp(result, 'return', {})
 623
 624         self.wait_until_completed()
 625
 626         self.assert_no_active_block_jobs()
 627         self.vm.shutdown()
 628
 629 class TestErrors(iotests.QMPTestCase):
 630     image_len = 2 * 1024 * 1024 # MB
 631
 632     # this should match STREAM_BUFFER_SIZE/512 in block/stream.c
 633     STREAM_BUFFER_SIZE = 512 * 1024
 634
 635     def create_blkdebug_file(self, name, event, errno):
 636         file = open(name, 'w')
 637         file.write('''
 638 [inject-error]
 639 state = "1"
 640 event = "%s"
 641 errno = "%d"
 642 immediately = "off"
 643 once = "on"
 644 sector = "%d"
 645
 646 [set-state]
 647 state = "1"
 648 event = "%s"
 649 new_state = "2"
 650
 651 [set-state]
 652 state = "2"
 653 event = "%s"
 654 new_state = "1"
 655 ''' % (event, errno, self.STREAM_BUFFER_SIZE // 512, event, event))
 656         file.close()
 657
 658 class TestEIO(TestErrors):
 659     def setUp(self):
 660         self.blkdebug_file = backing_img + ".blkdebug"
 661         iotests.create_image(backing_img, TestErrors.image_len)
 662         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 5)
 663         qemu_img('create', '-f', iotests.imgfmt,
 664                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 665                        % (self.blkdebug_file, backing_img),
 666                  test_img)
 667         self.vm = iotests.VM().add_drive(test_img)
 668         self.vm.launch()
 669
 670     def tearDown(self):
 671         self.vm.shutdown()
 672         os.remove(test_img)
 673         os.remove(backing_img)
 674         os.remove(self.blkdebug_file)
 675
 676     def test_report(self):
 677         self.assert_no_active_block_jobs()
 678
 679         result = self.vm.qmp('block-stream', device='drive0')
 680         self.assert_qmp(result, 'return', {})
 681
 682         completed = False
 683         error = False
 684         while not completed:
 685             for event in self.vm.get_qmp_events(wait=True):
 686                 if event['event'] == 'BLOCK_JOB_ERROR':
 687                     self.assert_qmp(event, 'data/device', 'drive0')
 688                     self.assert_qmp(event, 'data/operation', 'read')
 689                     error = True
 690                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 691                     self.assertTrue(error, 'job completed unexpectedly')
 692                     self.assert_qmp(event, 'data/type', 'stream')
 693                     self.assert_qmp(event, 'data/device', 'drive0')
 694                     self.assert_qmp(event, 'data/error', 'Input/output error')
 695                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 696                     self.assert_qmp(event, 'data/len', self.image_len)
 697                     completed = True
 698                 elif event['event'] == 'JOB_STATUS_CHANGE':
 699                     self.assert_qmp(event, 'data/id', 'drive0')
 700
 701         self.assert_no_active_block_jobs()
 702         self.vm.shutdown()
 703
 704     def test_ignore(self):
 705         self.assert_no_active_block_jobs()
 706
 707         result = self.vm.qmp('block-stream', device='drive0', on_error='ignore')
 708         self.assert_qmp(result, 'return', {})
 709
 710         error = False
 711         completed = False
 712         while not completed:
 713             for event in self.vm.get_qmp_events(wait=True):
 714                 if event['event'] == 'BLOCK_JOB_ERROR':
 715                     error = True
 716                     self.assert_qmp(event, 'data/device', 'drive0')
 717                     self.assert_qmp(event, 'data/operation', 'read')
 718                     result = self.vm.qmp('query-block-jobs')
 719                     if result == {'return': []}:
 720                         # Job finished too quickly
 721                         continue
 722                     self.assert_qmp(result, 'return[0]/paused', False)
 723                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 724                     self.assertTrue(error, 'job completed unexpectedly')
 725                     self.assert_qmp(event, 'data/type', 'stream')
 726                     self.assert_qmp(event, 'data/device', 'drive0')
 727                     self.assert_qmp(event, 'data/error', 'Input/output error')
 728                     self.assert_qmp(event, 'data/offset', self.image_len)
 729                     self.assert_qmp(event, 'data/len', self.image_len)
 730                     completed = True
 731                 elif event['event'] == 'JOB_STATUS_CHANGE':
 732                     self.assert_qmp(event, 'data/id', 'drive0')
 733
 734         self.assert_no_active_block_jobs()
 735         self.vm.shutdown()
 736
 737     def test_stop(self):
 738         self.assert_no_active_block_jobs()
 739
 740         result = self.vm.qmp('block-stream', device='drive0', on_error='stop')
 741         self.assert_qmp(result, 'return', {})
 742
 743         error = False
 744         completed = False
 745         while not completed:
 746             for event in self.vm.get_qmp_events(wait=True):
 747                 if event['event'] == 'BLOCK_JOB_ERROR':
 748                     error = True
 749                     self.assert_qmp(event, 'data/device', 'drive0')
 750                     self.assert_qmp(event, 'data/operation', 'read')
 751
 752                     result = self.vm.qmp('query-block-jobs')
 753                     self.assert_qmp(result, 'return[0]/paused', True)
 754                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 755                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 756
 757                     result = self.vm.qmp('block-job-resume', device='drive0')
 758                     self.assert_qmp(result, 'return', {})
 759
 760                     result = self.vm.qmp('query-block-jobs')
 761                     if result == {'return': []}:
 762                         # Race; likely already finished. Check.
 763                         continue
 764                     self.assert_qmp(result, 'return[0]/paused', False)
 765                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 766                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 767                     self.assertTrue(error, 'job completed unexpectedly')
 768                     self.assert_qmp(event, 'data/type', 'stream')
 769                     self.assert_qmp(event, 'data/device', 'drive0')
 770                     self.assert_qmp_absent(event, 'data/error')
 771                     self.assert_qmp(event, 'data/offset', self.image_len)
 772                     self.assert_qmp(event, 'data/len', self.image_len)
 773                     completed = True
 774                 elif event['event'] == 'JOB_STATUS_CHANGE':
 775                     self.assert_qmp(event, 'data/id', 'drive0')
 776
 777         self.assert_no_active_block_jobs()
 778         self.vm.shutdown()
 779
 780     def test_enospc(self):
 781         self.assert_no_active_block_jobs()
 782
 783         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 784         self.assert_qmp(result, 'return', {})
 785
 786         completed = False
 787         error = False
 788         while not completed:
 789             for event in self.vm.get_qmp_events(wait=True):
 790                 if event['event'] == 'BLOCK_JOB_ERROR':
 791                     self.assert_qmp(event, 'data/device', 'drive0')
 792                     self.assert_qmp(event, 'data/operation', 'read')
 793                     error = True
 794                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 795                     self.assertTrue(error, 'job completed unexpectedly')
 796                     self.assert_qmp(event, 'data/type', 'stream')
 797                     self.assert_qmp(event, 'data/device', 'drive0')
 798                     self.assert_qmp(event, 'data/error', 'Input/output error')
 799                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 800                     self.assert_qmp(event, 'data/len', self.image_len)
 801                     completed = True
 802                 elif event['event'] == 'JOB_STATUS_CHANGE':
 803                     self.assert_qmp(event, 'data/id', 'drive0')
 804
 805         self.assert_no_active_block_jobs()
 806         self.vm.shutdown()
 807
 808 class TestENOSPC(TestErrors):
 809     def setUp(self):
 810         self.blkdebug_file = backing_img + ".blkdebug"
 811         iotests.create_image(backing_img, TestErrors.image_len)
 812         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 28)
 813         qemu_img('create', '-f', iotests.imgfmt,
 814                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 815                        % (self.blkdebug_file, backing_img),
 816                  test_img)
 817         self.vm = iotests.VM().add_drive(test_img)
 818         self.vm.launch()
 819
 820     def tearDown(self):
 821         self.vm.shutdown()
 822         os.remove(test_img)
 823         os.remove(backing_img)
 824         os.remove(self.blkdebug_file)
 825
 826     def test_enospc(self):
 827         self.assert_no_active_block_jobs()
 828
 829         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 830         self.assert_qmp(result, 'return', {})
 831
 832         error = False
 833         completed = False
 834         while not completed:
 835             for event in self.vm.get_qmp_events(wait=True):
 836                 if event['event'] == 'BLOCK_JOB_ERROR':
 837                     self.assert_qmp(event, 'data/device', 'drive0')
 838                     self.assert_qmp(event, 'data/operation', 'read')
 839                     error = True
 840
 841                     result = self.vm.qmp('query-block-jobs')
 842                     self.assert_qmp(result, 'return[0]/paused', True)
 843                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 844                     self.assert_qmp(result, 'return[0]/io-status', 'nospace')
 845
 846                     result = self.vm.qmp('block-job-resume', device='drive0')
 847                     self.assert_qmp(result, 'return', {})
 848
 849                     result = self.vm.qmp('query-block-jobs')
 850                     if result == {'return': []}:
 851                         # Race; likely already finished. Check.
 852                         continue
 853                     self.assert_qmp(result, 'return[0]/paused', False)
 854                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 855                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 856                     self.assertTrue(error, 'job completed unexpectedly')
 857                     self.assert_qmp(event, 'data/type', 'stream')
 858                     self.assert_qmp(event, 'data/device', 'drive0')
 859                     self.assert_qmp_absent(event, 'data/error')
 860                     self.assert_qmp(event, 'data/offset', self.image_len)
 861                     self.assert_qmp(event, 'data/len', self.image_len)
 862                     completed = True
 863                 elif event['event'] == 'JOB_STATUS_CHANGE':
 864                     self.assert_qmp(event, 'data/id', 'drive0')
 865
 866         self.assert_no_active_block_jobs()
 867         self.vm.shutdown()
 868
 869 class TestStreamStop(iotests.QMPTestCase):
 870     image_len = 8 * 1024 * 1024 * 1024 # GB
 871
 872     def setUp(self):
 873         qemu_img('create', backing_img, str(TestStreamStop.image_len))
 874         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 875         qemu_img('create', '-f', iotests.imgfmt,
 876                  '-o', 'backing_file=%s' % backing_img,
 877                  '-F', 'raw', test_img)
 878         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 879         self.vm = iotests.VM().add_drive("blkdebug::" + test_img)
 880         self.vm.launch()
 881
 882     def tearDown(self):
 883         self.vm.shutdown()
 884         os.remove(test_img)
 885         os.remove(backing_img)
 886
 887     def test_stream_stop(self):
 888         self.assert_no_active_block_jobs()
 889
 890         self.vm.pause_drive('drive0')
 891         result = self.vm.qmp('block-stream', device='drive0')
 892         self.assert_qmp(result, 'return', {})
 893
 894         time.sleep(0.1)
 895         events = self.vm.get_qmp_events(wait=False)
 896         for e in events:
 897             self.assert_qmp(e, 'event', 'JOB_STATUS_CHANGE')
 898             self.assert_qmp(e, 'data/id', 'drive0')
 899
 900         self.cancel_and_wait(resume=True)
 901
 902 class TestSetSpeed(iotests.QMPTestCase):
 903     image_len = 80 * 1024 * 1024 # MB
 904
 905     def setUp(self):
 906         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 907         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 908         qemu_img('create', '-f', iotests.imgfmt,
 909                  '-o', 'backing_file=%s' % backing_img,
 910                  '-F', 'raw', test_img)
 911         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 912         self.vm = iotests.VM().add_drive('blkdebug::' + test_img)
 913         self.vm.launch()
 914
 915     def tearDown(self):
 916         self.vm.shutdown()
 917         os.remove(test_img)
 918         os.remove(backing_img)
 919
 920     # This is a short performance test which is not run by default.
 921     # Invoke "IMGFMT=qed ./030 TestSetSpeed.perf_test_throughput"
 922     def perf_test_throughput(self):
 923         self.assert_no_active_block_jobs()
 924
 925         result = self.vm.qmp('block-stream', device='drive0')
 926         self.assert_qmp(result, 'return', {})
 927
 928         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 929         self.assert_qmp(result, 'return', {})
 930
 931         self.wait_until_completed()
 932
 933         self.assert_no_active_block_jobs()
 934
 935     def test_set_speed(self):
 936         self.assert_no_active_block_jobs()
 937
 938         self.vm.pause_drive('drive0')
 939         result = self.vm.qmp('block-stream', device='drive0')
 940         self.assert_qmp(result, 'return', {})
 941
 942         # Default speed is 0
 943         result = self.vm.qmp('query-block-jobs')
 944         self.assert_qmp(result, 'return[0]/device', 'drive0')
 945         self.assert_qmp(result, 'return[0]/speed', 0)
 946
 947         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 948         self.assert_qmp(result, 'return', {})
 949
 950         # Ensure the speed we set was accepted
 951         result = self.vm.qmp('query-block-jobs')
 952         self.assert_qmp(result, 'return[0]/device', 'drive0')
 953         self.assert_qmp(result, 'return[0]/speed', 8 * 1024 * 1024)
 954
 955         self.cancel_and_wait(resume=True)
 956         self.vm.pause_drive('drive0')
 957
 958         # Check setting speed in block-stream works
 959         result = self.vm.qmp('block-stream', device='drive0', speed=4 * 1024 * 1024)
 960         self.assert_qmp(result, 'return', {})
 961
 962         result = self.vm.qmp('query-block-jobs')
 963         self.assert_qmp(result, 'return[0]/device', 'drive0')
 964         self.assert_qmp(result, 'return[0]/speed', 4 * 1024 * 1024)
 965
 966         self.cancel_and_wait(resume=True)
 967
 968     def test_set_speed_invalid(self):
 969         self.assert_no_active_block_jobs()
 970
 971         result = self.vm.qmp('block-stream', device='drive0', speed=-1)
 972         self.assert_qmp(result, 'error/desc', "Parameter 'speed' expects a non-negative value")
 973
 974         self.assert_no_active_block_jobs()
 975
 976         self.vm.pause_drive('drive0')
 977         result = self.vm.qmp('block-stream', device='drive0')
 978         self.assert_qmp(result, 'return', {})
 979
 980         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=-1)
 981         self.assert_qmp(result, 'error/desc', "Parameter 'speed' expects a non-negative value")
 982
 983         self.cancel_and_wait(resume=True)
 984
 985 if __name__ == '__main__':
 986     iotests.main(supported_fmts=['qcow2', 'qed'],
 987                  supported_protocols=['file'])