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         for job in pending_jobs:
 255             result = self.vm.qmp('block-job-set-speed', device=job, speed=0)
 256             self.assert_qmp(result, 'return', {})
 257
 258         # Wait for all jobs to be finished.
 259         while len(pending_jobs) > 0:
 260             for event in self.vm.get_qmp_events(wait=True):
 261                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 262                     job_id = self.dictpath(event, 'data/device')
 263                     self.assertTrue(job_id in pending_jobs)
 264                     self.assert_qmp_absent(event, 'data/error')
 265                     pending_jobs.remove(job_id)
 266
 267         self.assert_no_active_block_jobs()
 268         self.vm.shutdown()
 269
 270         # Check that all maps match now
 271         for i in range(2, self.num_imgs, 2):
 272             self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i]),
 273                              qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[i-1]),
 274                              'image file map does not match backing file after streaming')
 275
 276     # Test that it's not possible to perform two block-stream
 277     # operations if there are nodes involved in both.
 278     def test_overlapping_1(self):
 279         self.assert_no_active_block_jobs()
 280
 281         # Set a speed limit to make sure that this job blocks the rest
 282         result = self.vm.qmp('block-stream', device='node4',
 283                              job_id='stream-node4', base=self.imgs[1],
 284                              filter_node_name='stream-filter', speed=1024*1024)
 285         self.assert_qmp(result, 'return', {})
 286
 287         result = self.vm.qmp('block-stream', device='node5', job_id='stream-node5', base=self.imgs[2])
 288         self.assert_qmp(result, 'error/desc',
 289             "Node 'stream-filter' is busy: block device is in use by block job: stream")
 290
 291         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3', base=self.imgs[2])
 292         self.assert_qmp(result, 'error/desc',
 293             "Node 'node3' is busy: block device is in use by block job: stream")
 294
 295         result = self.vm.qmp('block-stream', device='node4', job_id='stream-node4-v2')
 296         self.assert_qmp(result, 'error/desc',
 297             "Node 'node4' is busy: block device is in use by block job: stream")
 298
 299         # block-commit should also fail if it touches nodes used by the stream job
 300         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[4], job_id='commit-node4')
 301         self.assert_qmp(result, 'error/desc',
 302             "Node 'stream-filter' is busy: block device is in use by block job: stream")
 303
 304         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[1], top=self.imgs[3], job_id='commit-node1')
 305         self.assert_qmp(result, 'error/desc',
 306             "Node 'node3' is busy: block device is in use by block job: stream")
 307
 308         # This fails because it needs to modify the backing string in node2, which is blocked
 309         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[0], top=self.imgs[1], job_id='commit-node0')
 310         self.assert_qmp(result, 'error/desc',
 311             "Node 'node2' is busy: block device is in use by block job: stream")
 312
 313         result = self.vm.qmp('block-job-set-speed', device='stream-node4', speed=0)
 314         self.assert_qmp(result, 'return', {})
 315
 316         self.wait_until_completed(drive='stream-node4')
 317         self.assert_no_active_block_jobs()
 318
 319     # Similar to test_overlapping_1, but with block-commit
 320     # blocking the other jobs
 321     def test_overlapping_2(self):
 322         self.assertLessEqual(9, self.num_imgs)
 323         self.assert_no_active_block_jobs()
 324
 325         # Set a speed limit to make sure that this job blocks the rest
 326         result = self.vm.qmp('block-commit', device='drive0', top=self.imgs[5], base=self.imgs[3], job_id='commit-node3', speed=1024*1024)
 327         self.assert_qmp(result, 'return', {})
 328
 329         result = self.vm.qmp('block-stream', device='node3', job_id='stream-node3')
 330         self.assert_qmp(result, 'error/desc',
 331             "Node 'node3' is busy: block device is in use by block job: commit")
 332
 333         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[2], job_id='stream-node6')
 334         self.assert_qmp(result, 'error/desc',
 335             "Node 'node5' is busy: block device is in use by block job: commit")
 336
 337         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], job_id='stream-node4')
 338         self.assert_qmp(result, 'error/desc',
 339             "Node 'node4' is busy: block device is in use by block job: commit")
 340
 341         result = self.vm.qmp('block-stream', device='node6', base=self.imgs[4], job_id='stream-node6-v2')
 342         self.assert_qmp(result, 'error/desc',
 343             "Node 'node5' is busy: block device is in use by block job: commit")
 344
 345         # This fails because block-commit currently blocks the active layer even if it's not used
 346         result = self.vm.qmp('block-stream', device='drive0', base=self.imgs[5], job_id='stream-drive0')
 347         self.assert_qmp(result, 'error/desc',
 348             "Node 'drive0' is busy: block device is in use by block job: commit")
 349
 350         result = self.vm.qmp('block-job-set-speed', device='commit-node3', speed=0)
 351         self.assert_qmp(result, 'return', {})
 352
 353         self.wait_until_completed(drive='commit-node3')
 354
 355     # Similar to test_overlapping_2, but here block-commit doesn't use the 'top' parameter.
 356     # Internally this uses a mirror block job, hence the separate test case.
 357     def test_overlapping_3(self):
 358         self.assertLessEqual(8, self.num_imgs)
 359         self.assert_no_active_block_jobs()
 360
 361         # Set a speed limit to make sure that this job blocks the rest
 362         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3], job_id='commit-drive0', speed=1024*1024)
 363         self.assert_qmp(result, 'return', {})
 364
 365         result = self.vm.qmp('block-stream', device='node5', base=self.imgs[3], job_id='stream-node6')
 366         self.assert_qmp(result, 'error/desc',
 367             "Node 'node5' is busy: block device is in use by block job: commit")
 368
 369         result = self.vm.qmp('block-job-set-speed', device='commit-drive0', speed=0)
 370         self.assert_qmp(result, 'return', {})
 371
 372         event = self.vm.event_wait(name='BLOCK_JOB_READY')
 373         self.assert_qmp(event, 'data/device', 'commit-drive0')
 374         self.assert_qmp(event, 'data/type', 'commit')
 375         self.assert_qmp_absent(event, 'data/error')
 376
 377         result = self.vm.qmp('block-job-complete', device='commit-drive0')
 378         self.assert_qmp(result, 'return', {})
 379
 380         self.wait_until_completed(drive='commit-drive0')
 381
 382     # In this case the base node of the stream job is the same as the
 383     # top node of commit job. Since this results in the commit filter
 384     # node being part of the stream chain, this is not allowed.
 385     def test_overlapping_4(self):
 386         self.assert_no_active_block_jobs()
 387
 388         # Commit from node2 into node0
 389         result = self.vm.qmp('block-commit', device='drive0',
 390                              top=self.imgs[2], base=self.imgs[0],
 391                              filter_node_name='commit-filter', speed=1024*1024)
 392         self.assert_qmp(result, 'return', {})
 393
 394         # Stream from node2 into node4
 395         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='node4')
 396         self.assert_qmp(result, 'error/desc',
 397             "Cannot freeze 'backing' link to 'commit-filter'")
 398
 399         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
 400         self.assert_qmp(result, 'return', {})
 401
 402         self.wait_until_completed()
 403         self.assert_no_active_block_jobs()
 404
 405     # In this case the base node of the stream job is the commit job's
 406     # filter node.  stream does not have a real dependency on its base
 407     # node, so even though commit removes it when it is done, there is
 408     # no conflict.
 409     def test_overlapping_5(self):
 410         self.assert_no_active_block_jobs()
 411
 412         # Commit from node2 into node0
 413         result = self.vm.qmp('block-commit', device='drive0',
 414                              top_node='node2', base_node='node0',
 415                              filter_node_name='commit-filter', speed=1024*1024)
 416         self.assert_qmp(result, 'return', {})
 417
 418         # Stream from node2 into node4
 419         result = self.vm.qmp('block-stream', device='node4',
 420                              base_node='commit-filter', job_id='node4')
 421         self.assert_qmp(result, 'return', {})
 422
 423         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
 424         self.assert_qmp(result, 'return', {})
 425
 426         self.vm.run_job(job='drive0', auto_dismiss=True)
 427         self.vm.run_job(job='node4', auto_dismiss=True)
 428         self.assert_no_active_block_jobs()
 429
 430     # Test a block-stream and a block-commit job in parallel
 431     # Here the stream job is supposed to finish quickly in order to reproduce
 432     # the scenario that triggers the bug fixed in 3d5d319e1221 and 1a63a907507
 433     def test_stream_commit_1(self):
 434         self.assertLessEqual(8, self.num_imgs)
 435         self.assert_no_active_block_jobs()
 436
 437         # Stream from node0 into node2
 438         result = self.vm.qmp('block-stream', device='node2', base_node='node0', job_id='node2')
 439         self.assert_qmp(result, 'return', {})
 440
 441         # Commit from the active layer into node3
 442         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[3])
 443         self.assert_qmp(result, 'return', {})
 444
 445         # Wait for all jobs to be finished.
 446         pending_jobs = ['node2', 'drive0']
 447         while len(pending_jobs) > 0:
 448             for event in self.vm.get_qmp_events(wait=True):
 449                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 450                     node_name = self.dictpath(event, 'data/device')
 451                     self.assertTrue(node_name in pending_jobs)
 452                     self.assert_qmp_absent(event, 'data/error')
 453                     pending_jobs.remove(node_name)
 454                 if event['event'] == 'BLOCK_JOB_READY':
 455                     self.assert_qmp(event, 'data/device', 'drive0')
 456                     self.assert_qmp(event, 'data/type', 'commit')
 457                     self.assert_qmp_absent(event, 'data/error')
 458                     self.assertTrue('drive0' in pending_jobs)
 459                     self.vm.qmp('block-job-complete', device='drive0')
 460
 461         self.assert_no_active_block_jobs()
 462
 463     # This is similar to test_stream_commit_1 but both jobs are slowed
 464     # down so they can run in parallel for a little while.
 465     def test_stream_commit_2(self):
 466         self.assertLessEqual(8, self.num_imgs)
 467         self.assert_no_active_block_jobs()
 468
 469         # Stream from node0 into node4
 470         result = self.vm.qmp('block-stream', device='node4', base_node='node0', job_id='node4', speed=1024*1024)
 471         self.assert_qmp(result, 'return', {})
 472
 473         # Commit from the active layer into node5
 474         result = self.vm.qmp('block-commit', device='drive0', base=self.imgs[5], speed=1024*1024)
 475         self.assert_qmp(result, 'return', {})
 476
 477         for job in ['drive0', 'node4']:
 478             result = self.vm.qmp('block-job-set-speed', device=job, speed=0)
 479             self.assert_qmp(result, 'return', {})
 480
 481         # Wait for all jobs to be finished.
 482         pending_jobs = ['node4', 'drive0']
 483         while len(pending_jobs) > 0:
 484             for event in self.vm.get_qmp_events(wait=True):
 485                 if event['event'] == 'BLOCK_JOB_COMPLETED':
 486                     node_name = self.dictpath(event, 'data/device')
 487                     self.assertTrue(node_name in pending_jobs)
 488                     self.assert_qmp_absent(event, 'data/error')
 489                     pending_jobs.remove(node_name)
 490                 if event['event'] == 'BLOCK_JOB_READY':
 491                     self.assert_qmp(event, 'data/device', 'drive0')
 492                     self.assert_qmp(event, 'data/type', 'commit')
 493                     self.assert_qmp_absent(event, 'data/error')
 494                     self.assertTrue('drive0' in pending_jobs)
 495                     self.vm.qmp('block-job-complete', device='drive0')
 496
 497         self.assert_no_active_block_jobs()
 498
 499     # Test the base_node parameter
 500     def test_stream_base_node_name(self):
 501         self.assert_no_active_block_jobs()
 502
 503         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[4]),
 504                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.imgs[3]),
 505                             'image file map matches backing file before streaming')
 506
 507         # Error: the base node does not exist
 508         result = self.vm.qmp('block-stream', device='node4', base_node='none', job_id='stream')
 509         self.assert_qmp(result, 'error/desc',
 510             'Cannot find device=\'\' nor node-name=\'none\'')
 511
 512         # Error: the base node is not a backing file of the top node
 513         result = self.vm.qmp('block-stream', device='node4', base_node='node6', job_id='stream')
 514         self.assert_qmp(result, 'error/desc',
 515             "Node 'node6' is not a backing image of 'node4'")
 516
 517         # Error: the base node is the same as the top node
 518         result = self.vm.qmp('block-stream', device='node4', base_node='node4', job_id='stream')
 519         self.assert_qmp(result, 'error/desc',
 520             "Node 'node4' is not a backing image of 'node4'")
 521
 522         # Error: cannot specify 'base' and 'base-node' at the same time
 523         result = self.vm.qmp('block-stream', device='node4', base=self.imgs[2], base_node='node2', job_id='stream')
 524         self.assert_qmp(result, 'error/desc',
 525             "'base' and 'base-node' cannot be specified at the same time")
 526
 527         # Success: the base node is a backing file of the top node
 528         result = self.vm.qmp('block-stream', device='node4', base_node='node2', job_id='stream')
 529         self.assert_qmp(result, 'return', {})
 530
 531         self.wait_until_completed(drive='stream')
 532
 533         self.assert_no_active_block_jobs()
 534         self.vm.shutdown()
 535
 536         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[4]),
 537                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.imgs[3]),
 538                          'image file map matches backing file after streaming')
 539
 540 class TestQuorum(iotests.QMPTestCase):
 541     num_children = 3
 542     children = []
 543     backing = []
 544
 545     @iotests.skip_if_unsupported(['quorum'])
 546     def setUp(self):
 547         opts = ['driver=quorum', 'vote-threshold=2']
 548
 549         # Initialize file names and command-line options
 550         for i in range(self.num_children):
 551             child_img = os.path.join(iotests.test_dir, 'img-%d.img' % i)
 552             backing_img = os.path.join(iotests.test_dir, 'backing-%d.img' % i)
 553             self.children.append(child_img)
 554             self.backing.append(backing_img)
 555             qemu_img('create', '-f', iotests.imgfmt, backing_img, '1M')
 556             qemu_io('-f', iotests.imgfmt,
 557                     '-c', 'write -P 0x55 0 1024', backing_img)
 558             qemu_img('create', '-f', iotests.imgfmt,
 559                      '-o', 'backing_file=%s' % backing_img,
 560                      '-F', iotests.imgfmt, child_img)
 561             opts.append("children.%d.file.filename=%s" % (i, child_img))
 562             opts.append("children.%d.node-name=node%d" % (i, i))
 563
 564         # Attach the drive to the VM
 565         self.vm = iotests.VM()
 566         self.vm.add_drive(path = None, opts = ','.join(opts))
 567         self.vm.launch()
 568
 569     def tearDown(self):
 570         self.vm.shutdown()
 571         for img in self.children:
 572             os.remove(img)
 573         for img in self.backing:
 574             os.remove(img)
 575
 576     def test_stream_quorum(self):
 577         self.assertNotEqual(qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.children[0]),
 578                             qemu_io('-f', iotests.imgfmt, '-rU', '-c', 'map', self.backing[0]),
 579                             'image file map matches backing file before streaming')
 580
 581         self.assert_no_active_block_jobs()
 582
 583         result = self.vm.qmp('block-stream', device='node0', job_id='stream-node0')
 584         self.assert_qmp(result, 'return', {})
 585
 586         self.wait_until_completed(drive='stream-node0')
 587
 588         self.assert_no_active_block_jobs()
 589         self.vm.shutdown()
 590
 591         self.assertEqual(qemu_io('-f', iotests.imgfmt, '-c', 'map', self.children[0]),
 592                          qemu_io('-f', iotests.imgfmt, '-c', 'map', self.backing[0]),
 593                          'image file map does not match backing file after streaming')
 594
 595 class TestSmallerBackingFile(iotests.QMPTestCase):
 596     backing_len = 1 * 1024 * 1024 # MB
 597     image_len = 2 * backing_len
 598
 599     def setUp(self):
 600         iotests.create_image(backing_img, self.backing_len)
 601         qemu_img('create', '-f', iotests.imgfmt,
 602                  '-o', 'backing_file=%s' % backing_img,
 603                  '-F', 'raw', test_img, str(self.image_len))
 604         self.vm = iotests.VM().add_drive(test_img)
 605         self.vm.launch()
 606
 607     # If this hangs, then you are missing a fix to complete streaming when the
 608     # end of the backing file is reached.
 609     def test_stream(self):
 610         self.assert_no_active_block_jobs()
 611
 612         result = self.vm.qmp('block-stream', device='drive0')
 613         self.assert_qmp(result, 'return', {})
 614
 615         self.wait_until_completed()
 616
 617         self.assert_no_active_block_jobs()
 618         self.vm.shutdown()
 619
 620 class TestErrors(iotests.QMPTestCase):
 621     image_len = 2 * 1024 * 1024 # MB
 622
 623     # this should match STREAM_BUFFER_SIZE/512 in block/stream.c
 624     STREAM_BUFFER_SIZE = 512 * 1024
 625
 626     def create_blkdebug_file(self, name, event, errno):
 627         file = open(name, 'w')
 628         file.write('''
 629 [inject-error]
 630 state = "1"
 631 event = "%s"
 632 errno = "%d"
 633 immediately = "off"
 634 once = "on"
 635 sector = "%d"
 636
 637 [set-state]
 638 state = "1"
 639 event = "%s"
 640 new_state = "2"
 641
 642 [set-state]
 643 state = "2"
 644 event = "%s"
 645 new_state = "1"
 646 ''' % (event, errno, self.STREAM_BUFFER_SIZE // 512, event, event))
 647         file.close()
 648
 649 class TestEIO(TestErrors):
 650     def setUp(self):
 651         self.blkdebug_file = backing_img + ".blkdebug"
 652         iotests.create_image(backing_img, TestErrors.image_len)
 653         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 5)
 654         qemu_img('create', '-f', iotests.imgfmt,
 655                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 656                        % (self.blkdebug_file, backing_img),
 657                  test_img)
 658         self.vm = iotests.VM().add_drive(test_img)
 659         self.vm.launch()
 660
 661     def tearDown(self):
 662         self.vm.shutdown()
 663         os.remove(test_img)
 664         os.remove(backing_img)
 665         os.remove(self.blkdebug_file)
 666
 667     def test_report(self):
 668         self.assert_no_active_block_jobs()
 669
 670         result = self.vm.qmp('block-stream', device='drive0')
 671         self.assert_qmp(result, 'return', {})
 672
 673         completed = False
 674         error = False
 675         while not completed:
 676             for event in self.vm.get_qmp_events(wait=True):
 677                 if event['event'] == 'BLOCK_JOB_ERROR':
 678                     self.assert_qmp(event, 'data/device', 'drive0')
 679                     self.assert_qmp(event, 'data/operation', 'read')
 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(event, 'data/error', 'Input/output error')
 686                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 687                     self.assert_qmp(event, 'data/len', self.image_len)
 688                     completed = True
 689                 elif event['event'] == 'JOB_STATUS_CHANGE':
 690                     self.assert_qmp(event, 'data/id', 'drive0')
 691
 692         self.assert_no_active_block_jobs()
 693         self.vm.shutdown()
 694
 695     def test_ignore(self):
 696         self.assert_no_active_block_jobs()
 697
 698         result = self.vm.qmp('block-stream', device='drive0', on_error='ignore')
 699         self.assert_qmp(result, 'return', {})
 700
 701         error = False
 702         completed = False
 703         while not completed:
 704             for event in self.vm.get_qmp_events(wait=True):
 705                 if event['event'] == 'BLOCK_JOB_ERROR':
 706                     error = True
 707                     self.assert_qmp(event, 'data/device', 'drive0')
 708                     self.assert_qmp(event, 'data/operation', 'read')
 709                     result = self.vm.qmp('query-block-jobs')
 710                     if result == {'return': []}:
 711                         # Job finished too quickly
 712                         continue
 713                     self.assert_qmp(result, 'return[0]/paused', False)
 714                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 715                     self.assertTrue(error, 'job completed unexpectedly')
 716                     self.assert_qmp(event, 'data/type', 'stream')
 717                     self.assert_qmp(event, 'data/device', 'drive0')
 718                     self.assert_qmp(event, 'data/error', 'Input/output error')
 719                     self.assert_qmp(event, 'data/offset', self.image_len)
 720                     self.assert_qmp(event, 'data/len', self.image_len)
 721                     completed = True
 722                 elif event['event'] == 'JOB_STATUS_CHANGE':
 723                     self.assert_qmp(event, 'data/id', 'drive0')
 724
 725         self.assert_no_active_block_jobs()
 726         self.vm.shutdown()
 727
 728     def test_stop(self):
 729         self.assert_no_active_block_jobs()
 730
 731         result = self.vm.qmp('block-stream', device='drive0', on_error='stop')
 732         self.assert_qmp(result, 'return', {})
 733
 734         error = False
 735         completed = False
 736         while not completed:
 737             for event in self.vm.get_qmp_events(wait=True):
 738                 if event['event'] == 'BLOCK_JOB_ERROR':
 739                     error = True
 740                     self.assert_qmp(event, 'data/device', 'drive0')
 741                     self.assert_qmp(event, 'data/operation', 'read')
 742
 743                     result = self.vm.qmp('query-block-jobs')
 744                     self.assert_qmp(result, 'return[0]/paused', True)
 745                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 746                     self.assert_qmp(result, 'return[0]/io-status', 'failed')
 747
 748                     result = self.vm.qmp('block-job-resume', device='drive0')
 749                     self.assert_qmp(result, 'return', {})
 750
 751                     result = self.vm.qmp('query-block-jobs')
 752                     if result == {'return': []}:
 753                         # Race; likely already finished. Check.
 754                         continue
 755                     self.assert_qmp(result, 'return[0]/paused', False)
 756                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 757                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 758                     self.assertTrue(error, 'job completed unexpectedly')
 759                     self.assert_qmp(event, 'data/type', 'stream')
 760                     self.assert_qmp(event, 'data/device', 'drive0')
 761                     self.assert_qmp_absent(event, 'data/error')
 762                     self.assert_qmp(event, 'data/offset', self.image_len)
 763                     self.assert_qmp(event, 'data/len', self.image_len)
 764                     completed = True
 765                 elif event['event'] == 'JOB_STATUS_CHANGE':
 766                     self.assert_qmp(event, 'data/id', 'drive0')
 767
 768         self.assert_no_active_block_jobs()
 769         self.vm.shutdown()
 770
 771     def test_enospc(self):
 772         self.assert_no_active_block_jobs()
 773
 774         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 775         self.assert_qmp(result, 'return', {})
 776
 777         completed = False
 778         error = False
 779         while not completed:
 780             for event in self.vm.get_qmp_events(wait=True):
 781                 if event['event'] == 'BLOCK_JOB_ERROR':
 782                     self.assert_qmp(event, 'data/device', 'drive0')
 783                     self.assert_qmp(event, 'data/operation', 'read')
 784                     error = True
 785                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 786                     self.assertTrue(error, 'job completed unexpectedly')
 787                     self.assert_qmp(event, 'data/type', 'stream')
 788                     self.assert_qmp(event, 'data/device', 'drive0')
 789                     self.assert_qmp(event, 'data/error', 'Input/output error')
 790                     self.assert_qmp(event, 'data/offset', self.STREAM_BUFFER_SIZE)
 791                     self.assert_qmp(event, 'data/len', self.image_len)
 792                     completed = True
 793                 elif event['event'] == 'JOB_STATUS_CHANGE':
 794                     self.assert_qmp(event, 'data/id', 'drive0')
 795
 796         self.assert_no_active_block_jobs()
 797         self.vm.shutdown()
 798
 799 class TestENOSPC(TestErrors):
 800     def setUp(self):
 801         self.blkdebug_file = backing_img + ".blkdebug"
 802         iotests.create_image(backing_img, TestErrors.image_len)
 803         self.create_blkdebug_file(self.blkdebug_file, "read_aio", 28)
 804         qemu_img('create', '-f', iotests.imgfmt,
 805                  '-o', 'backing_file=blkdebug:%s:%s,backing_fmt=raw'
 806                        % (self.blkdebug_file, backing_img),
 807                  test_img)
 808         self.vm = iotests.VM().add_drive(test_img)
 809         self.vm.launch()
 810
 811     def tearDown(self):
 812         self.vm.shutdown()
 813         os.remove(test_img)
 814         os.remove(backing_img)
 815         os.remove(self.blkdebug_file)
 816
 817     def test_enospc(self):
 818         self.assert_no_active_block_jobs()
 819
 820         result = self.vm.qmp('block-stream', device='drive0', on_error='enospc')
 821         self.assert_qmp(result, 'return', {})
 822
 823         error = False
 824         completed = False
 825         while not completed:
 826             for event in self.vm.get_qmp_events(wait=True):
 827                 if event['event'] == 'BLOCK_JOB_ERROR':
 828                     self.assert_qmp(event, 'data/device', 'drive0')
 829                     self.assert_qmp(event, 'data/operation', 'read')
 830                     error = True
 831
 832                     result = self.vm.qmp('query-block-jobs')
 833                     self.assert_qmp(result, 'return[0]/paused', True)
 834                     self.assert_qmp(result, 'return[0]/offset', self.STREAM_BUFFER_SIZE)
 835                     self.assert_qmp(result, 'return[0]/io-status', 'nospace')
 836
 837                     result = self.vm.qmp('block-job-resume', device='drive0')
 838                     self.assert_qmp(result, 'return', {})
 839
 840                     result = self.vm.qmp('query-block-jobs')
 841                     if result == {'return': []}:
 842                         # Race; likely already finished. Check.
 843                         continue
 844                     self.assert_qmp(result, 'return[0]/paused', False)
 845                     self.assert_qmp(result, 'return[0]/io-status', 'ok')
 846                 elif event['event'] == 'BLOCK_JOB_COMPLETED':
 847                     self.assertTrue(error, 'job completed unexpectedly')
 848                     self.assert_qmp(event, 'data/type', 'stream')
 849                     self.assert_qmp(event, 'data/device', 'drive0')
 850                     self.assert_qmp_absent(event, 'data/error')
 851                     self.assert_qmp(event, 'data/offset', self.image_len)
 852                     self.assert_qmp(event, 'data/len', self.image_len)
 853                     completed = True
 854                 elif event['event'] == 'JOB_STATUS_CHANGE':
 855                     self.assert_qmp(event, 'data/id', 'drive0')
 856
 857         self.assert_no_active_block_jobs()
 858         self.vm.shutdown()
 859
 860 class TestStreamStop(iotests.QMPTestCase):
 861     image_len = 8 * 1024 * 1024 * 1024 # GB
 862
 863     def setUp(self):
 864         qemu_img('create', backing_img, str(TestStreamStop.image_len))
 865         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 866         qemu_img('create', '-f', iotests.imgfmt,
 867                  '-o', 'backing_file=%s' % backing_img,
 868                  '-F', 'raw', test_img)
 869         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 870         self.vm = iotests.VM().add_drive("blkdebug::" + test_img)
 871         self.vm.launch()
 872
 873     def tearDown(self):
 874         self.vm.shutdown()
 875         os.remove(test_img)
 876         os.remove(backing_img)
 877
 878     def test_stream_stop(self):
 879         self.assert_no_active_block_jobs()
 880
 881         self.vm.pause_drive('drive0')
 882         result = self.vm.qmp('block-stream', device='drive0')
 883         self.assert_qmp(result, 'return', {})
 884
 885         time.sleep(0.1)
 886         events = self.vm.get_qmp_events(wait=False)
 887         for e in events:
 888             self.assert_qmp(e, 'event', 'JOB_STATUS_CHANGE')
 889             self.assert_qmp(e, 'data/id', 'drive0')
 890
 891         self.cancel_and_wait(resume=True)
 892
 893 class TestSetSpeed(iotests.QMPTestCase):
 894     image_len = 80 * 1024 * 1024 # MB
 895
 896     def setUp(self):
 897         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 898         qemu_io('-f', 'raw', '-c', 'write -P 0x1 0 32M', backing_img)
 899         qemu_img('create', '-f', iotests.imgfmt,
 900                  '-o', 'backing_file=%s' % backing_img,
 901                  '-F', 'raw', test_img)
 902         qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0x1 32M 32M', test_img)
 903         self.vm = iotests.VM().add_drive('blkdebug::' + test_img)
 904         self.vm.launch()
 905
 906     def tearDown(self):
 907         self.vm.shutdown()
 908         os.remove(test_img)
 909         os.remove(backing_img)
 910
 911     # This is a short performance test which is not run by default.
 912     # Invoke "IMGFMT=qed ./030 TestSetSpeed.perf_test_throughput"
 913     def perf_test_throughput(self):
 914         self.assert_no_active_block_jobs()
 915
 916         result = self.vm.qmp('block-stream', device='drive0')
 917         self.assert_qmp(result, 'return', {})
 918
 919         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 920         self.assert_qmp(result, 'return', {})
 921
 922         self.wait_until_completed()
 923
 924         self.assert_no_active_block_jobs()
 925
 926     def test_set_speed(self):
 927         self.assert_no_active_block_jobs()
 928
 929         self.vm.pause_drive('drive0')
 930         result = self.vm.qmp('block-stream', device='drive0')
 931         self.assert_qmp(result, 'return', {})
 932
 933         # Default speed is 0
 934         result = self.vm.qmp('query-block-jobs')
 935         self.assert_qmp(result, 'return[0]/device', 'drive0')
 936         self.assert_qmp(result, 'return[0]/speed', 0)
 937
 938         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=8 * 1024 * 1024)
 939         self.assert_qmp(result, 'return', {})
 940
 941         # Ensure the speed we set was accepted
 942         result = self.vm.qmp('query-block-jobs')
 943         self.assert_qmp(result, 'return[0]/device', 'drive0')
 944         self.assert_qmp(result, 'return[0]/speed', 8 * 1024 * 1024)
 945
 946         self.cancel_and_wait(resume=True)
 947         self.vm.pause_drive('drive0')
 948
 949         # Check setting speed in block-stream works
 950         result = self.vm.qmp('block-stream', device='drive0', speed=4 * 1024 * 1024)
 951         self.assert_qmp(result, 'return', {})
 952
 953         result = self.vm.qmp('query-block-jobs')
 954         self.assert_qmp(result, 'return[0]/device', 'drive0')
 955         self.assert_qmp(result, 'return[0]/speed', 4 * 1024 * 1024)
 956
 957         self.cancel_and_wait(resume=True)
 958
 959     def test_set_speed_invalid(self):
 960         self.assert_no_active_block_jobs()
 961
 962         result = self.vm.qmp('block-stream', device='drive0', speed=-1)
 963         self.assert_qmp(result, 'error/desc', "Parameter 'speed' expects a non-negative value")
 964
 965         self.assert_no_active_block_jobs()
 966
 967         self.vm.pause_drive('drive0')
 968         result = self.vm.qmp('block-stream', device='drive0')
 969         self.assert_qmp(result, 'return', {})
 970
 971         result = self.vm.qmp('block-job-set-speed', device='drive0', speed=-1)
 972         self.assert_qmp(result, 'error/desc', "Parameter 'speed' expects a non-negative value")
 973
 974         self.cancel_and_wait(resume=True)
 975
 976 if __name__ == '__main__':
 977     iotests.main(supported_fmts=['qcow2', 'qed'],
 978                  supported_protocols=['file'])