tests/qemu-iotests/056

   1 #!/usr/bin/env python
   2 #
   3 # Tests for drive-backup
   4 #
   5 # Copyright (C) 2013 Red Hat, Inc.
   6 #
   7 # Based on 041.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 import time
  24 import os
  25 import iotests
  26 from iotests import qemu_img, qemu_io, create_image
  27
  28 backing_img = os.path.join(iotests.test_dir, 'backing.img')
  29 test_img = os.path.join(iotests.test_dir, 'test.img')
  30 target_img = os.path.join(iotests.test_dir, 'target.img')
  31
  32 def img_create(img, fmt=iotests.imgfmt, size='64M', **kwargs):
  33     fullname = os.path.join(iotests.test_dir, '%s.%s' % (img, fmt))
  34     optargs = []
  35     for k,v in kwargs.items():
  36         optargs = optargs + ['-o', '%s=%s' % (k,v)]
  37     args = ['create', '-f', fmt] + optargs + [fullname, size]
  38     iotests.qemu_img(*args)
  39     return fullname
  40
  41 def try_remove(img):
  42     try:
  43         os.remove(img)
  44     except OSError:
  45         pass
  46
  47 def io_write_patterns(img, patterns):
  48     for pattern in patterns:
  49         iotests.qemu_io('-c', 'write -P%s %s %s' % pattern, img)
  50
  51
  52 class TestSyncModesNoneAndTop(iotests.QMPTestCase):
  53     image_len = 64 * 1024 * 1024 # MB
  54
  55     def setUp(self):
  56         create_image(backing_img, TestSyncModesNoneAndTop.image_len)
  57         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
  58         qemu_io('-c', 'write -P0x41 0 512', test_img)
  59         qemu_io('-c', 'write -P0xd5 1M 32k', test_img)
  60         qemu_io('-c', 'write -P0xdc 32M 124k', test_img)
  61         qemu_io('-c', 'write -P0xdc 67043328 64k', test_img)
  62         self.vm = iotests.VM().add_drive(test_img)
  63         self.vm.launch()
  64
  65     def tearDown(self):
  66         self.vm.shutdown()
  67         os.remove(test_img)
  68         os.remove(backing_img)
  69         try:
  70             os.remove(target_img)
  71         except OSError:
  72             pass
  73
  74     def test_complete_top(self):
  75         self.assert_no_active_block_jobs()
  76         result = self.vm.qmp('drive-backup', device='drive0', sync='top',
  77                              format=iotests.imgfmt, target=target_img)
  78         self.assert_qmp(result, 'return', {})
  79
  80         self.wait_until_completed(check_offset=False)
  81
  82         self.assert_no_active_block_jobs()
  83         self.vm.shutdown()
  84         self.assertTrue(iotests.compare_images(test_img, target_img),
  85                         'target image does not match source after backup')
  86
  87     def test_cancel_sync_none(self):
  88         self.assert_no_active_block_jobs()
  89
  90         result = self.vm.qmp('drive-backup', device='drive0',
  91                              sync='none', target=target_img)
  92         self.assert_qmp(result, 'return', {})
  93         time.sleep(1)
  94         self.vm.hmp_qemu_io('drive0', 'write -P0x5e 0 512')
  95         self.vm.hmp_qemu_io('drive0', 'aio_flush')
  96         # Verify that the original contents exist in the target image.
  97
  98         event = self.cancel_and_wait()
  99         self.assert_qmp(event, 'data/type', 'backup')
 100
 101         self.vm.shutdown()
 102         time.sleep(1)
 103         self.assertEqual(-1, qemu_io('-c', 'read -P0x41 0 512', target_img).find("verification failed"))
 104
 105 class TestBeforeWriteNotifier(iotests.QMPTestCase):
 106     def setUp(self):
 107         self.vm = iotests.VM().add_drive_raw("file=blkdebug::null-co://,id=drive0,align=65536,driver=blkdebug")
 108         self.vm.launch()
 109
 110     def tearDown(self):
 111         self.vm.shutdown()
 112         os.remove(target_img)
 113
 114     def test_before_write_notifier(self):
 115         self.vm.pause_drive("drive0")
 116         result = self.vm.qmp('drive-backup', device='drive0',
 117                              sync='full', target=target_img,
 118                              format="file", speed=1)
 119         self.assert_qmp(result, 'return', {})
 120         result = self.vm.qmp('block-job-pause', device="drive0")
 121         self.assert_qmp(result, 'return', {})
 122         # Speed is low enough that this must be an uncopied range, which will
 123         # trigger the before write notifier
 124         self.vm.hmp_qemu_io('drive0', 'aio_write -P 1 512512 512')
 125         self.vm.resume_drive("drive0")
 126         result = self.vm.qmp('block-job-resume', device="drive0")
 127         self.assert_qmp(result, 'return', {})
 128         event = self.cancel_and_wait()
 129         self.assert_qmp(event, 'data/type', 'backup')
 130
 131 class BackupTest(iotests.QMPTestCase):
 132     def setUp(self):
 133         self.vm = iotests.VM()
 134         self.test_img = img_create('test')
 135         self.dest_img = img_create('dest')
 136         self.vm.add_drive(self.test_img)
 137         self.vm.launch()
 138
 139     def tearDown(self):
 140         self.vm.shutdown()
 141         try_remove(self.test_img)
 142         try_remove(self.dest_img)
 143
 144     def hmp_io_writes(self, drive, patterns):
 145         for pattern in patterns:
 146             self.vm.hmp_qemu_io(drive, 'write -P%s %s %s' % pattern)
 147         self.vm.hmp_qemu_io(drive, 'flush')
 148
 149     def qmp_backup_and_wait(self, cmd='drive-backup', serror=None,
 150                             aerror=None, **kwargs):
 151         if not self.qmp_backup(cmd, serror, **kwargs):
 152             return False
 153         return self.qmp_backup_wait(kwargs['device'], aerror)
 154
 155     def qmp_backup(self, cmd='drive-backup',
 156                    error=None, **kwargs):
 157         self.assertTrue('device' in kwargs)
 158         res = self.vm.qmp(cmd, **kwargs)
 159         if error:
 160             self.assert_qmp(res, 'error/desc', error)
 161             return False
 162         self.assert_qmp(res, 'return', {})
 163         return True
 164
 165     def qmp_backup_wait(self, device, error=None):
 166         event = self.vm.event_wait(name="BLOCK_JOB_COMPLETED",
 167                                    match={'data': {'device': device}})
 168         self.assertNotEqual(event, None)
 169         try:
 170             failure = self.dictpath(event, 'data/error')
 171         except AssertionError:
 172             # Backup succeeded.
 173             self.assert_qmp(event, 'data/offset', event['data']['len'])
 174             return True
 175         else:
 176             # Failure.
 177             self.assert_qmp(event, 'data/error', qerror)
 178             return False
 179
 180     def test_dismiss_false(self):
 181         res = self.vm.qmp('query-block-jobs')
 182         self.assert_qmp(res, 'return', [])
 183         self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
 184                                  sync='full', target=self.dest_img,
 185                                  auto_dismiss=True)
 186         res = self.vm.qmp('query-block-jobs')
 187         self.assert_qmp(res, 'return', [])
 188
 189     def test_dismiss_true(self):
 190         res = self.vm.qmp('query-block-jobs')
 191         self.assert_qmp(res, 'return', [])
 192         self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
 193                                  sync='full', target=self.dest_img,
 194                                  auto_dismiss=False)
 195         res = self.vm.qmp('query-block-jobs')
 196         self.assert_qmp(res, 'return[0]/status', 'concluded')
 197         res = self.vm.qmp('block-job-dismiss', id='drive0')
 198         self.assert_qmp(res, 'return', {})
 199         res = self.vm.qmp('query-block-jobs')
 200         self.assert_qmp(res, 'return', [])
 201
 202     def test_dismiss_bad_id(self):
 203         res = self.vm.qmp('query-block-jobs')
 204         self.assert_qmp(res, 'return', [])
 205         res = self.vm.qmp('block-job-dismiss', id='foobar')
 206         self.assert_qmp(res, 'error/class', 'DeviceNotActive')
 207
 208     def test_dismiss_collision(self):
 209         res = self.vm.qmp('query-block-jobs')
 210         self.assert_qmp(res, 'return', [])
 211         self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
 212                                  sync='full', target=self.dest_img,
 213                                  auto_dismiss=False)
 214         res = self.vm.qmp('query-block-jobs')
 215         self.assert_qmp(res, 'return[0]/status', 'concluded')
 216         # Leave zombie job un-dismissed, observe a failure:
 217         res = self.qmp_backup_and_wait(serror="Node 'drive0' is busy: block device is in use by block job: backup",
 218                                        device='drive0', format=iotests.imgfmt,
 219                                        sync='full', target=self.dest_img,
 220                                        auto_dismiss=False)
 221         self.assertEqual(res, False)
 222         # OK, dismiss the zombie.
 223         res = self.vm.qmp('block-job-dismiss', id='drive0')
 224         self.assert_qmp(res, 'return', {})
 225         res = self.vm.qmp('query-block-jobs')
 226         self.assert_qmp(res, 'return', [])
 227         # Ensure it's really gone.
 228         self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
 229                                  sync='full', target=self.dest_img,
 230                                  auto_dismiss=False)
 231
 232     def dismissal_failure(self, dismissal_opt):
 233         res = self.vm.qmp('query-block-jobs')
 234         self.assert_qmp(res, 'return', [])
 235         # Give blkdebug something to chew on
 236         self.hmp_io_writes('drive0',
 237                            (('0x9a', 0, 512),
 238                            ('0x55', '8M', '352k'),
 239                            ('0x78', '15872k', '1M')))
 240         # Add destination node via blkdebug
 241         res = self.vm.qmp('blockdev-add',
 242                           node_name='target0',
 243                           driver=iotests.imgfmt,
 244                           file={
 245                               'driver': 'blkdebug',
 246                               'image': {
 247                                   'driver': 'file',
 248                                   'filename': self.dest_img
 249                               },
 250                               'inject-error': [{
 251                                   'event': 'write_aio',
 252                                   'errno': 5,
 253                                   'immediately': False,
 254                                   'once': True
 255                               }],
 256                           })
 257         self.assert_qmp(res, 'return', {})
 258
 259         res = self.qmp_backup(cmd='blockdev-backup',
 260                               device='drive0', target='target0',
 261                               on_target_error='stop',
 262                               sync='full',
 263                               auto_dismiss=dismissal_opt)
 264         self.assertTrue(res)
 265         event = self.vm.event_wait(name="BLOCK_JOB_ERROR",
 266                                    match={'data': {'device': 'drive0'}})
 267         self.assertNotEqual(event, None)
 268         # OK, job should be wedged
 269         res = self.vm.qmp('query-block-jobs')
 270         self.assert_qmp(res, 'return[0]/status', 'paused')
 271         res = self.vm.qmp('block-job-dismiss', id='drive0')
 272         self.assert_qmp(res, 'error/desc',
 273                         "Job 'drive0' in state 'paused' cannot accept"
 274                         " command verb 'dismiss'")
 275         res = self.vm.qmp('query-block-jobs')
 276         self.assert_qmp(res, 'return[0]/status', 'paused')
 277         # OK, unstick job and move forward.
 278         res = self.vm.qmp('block-job-resume', device='drive0')
 279         self.assert_qmp(res, 'return', {})
 280         # And now we need to wait for it to conclude;
 281         res = self.qmp_backup_wait(device='drive0')
 282         self.assertTrue(res)
 283         if not dismissal_opt:
 284             # Job should now be languishing:
 285             res = self.vm.qmp('query-block-jobs')
 286             self.assert_qmp(res, 'return[0]/status', 'concluded')
 287             res = self.vm.qmp('block-job-dismiss', id='drive0')
 288             self.assert_qmp(res, 'return', {})
 289             res = self.vm.qmp('query-block-jobs')
 290             self.assert_qmp(res, 'return', [])
 291
 292     def test_dismiss_premature(self):
 293         self.dismissal_failure(False)
 294
 295     def test_dismiss_erroneous(self):
 296         self.dismissal_failure(True)
 297
 298 if __name__ == '__main__':
 299     iotests.main(supported_fmts=['qcow2', 'qed'])