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 23import time 24import os 25import iotests 26from iotests import qemu_img, qemu_io, create_image 27 28backing_img = os.path.join(iotests.test_dir, 'backing.img') 29test_img = os.path.join(iotests.test_dir, 'test.img') 30target_img = os.path.join(iotests.test_dir, 'target.img') 31 32def 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 41def try_remove(img): 42 try: 43 os.remove(img) 44 except OSError: 45 pass 46 47def io_write_patterns(img, patterns): 48 for pattern in patterns: 49 iotests.qemu_io('-c', 'write -P%s %s %s' % pattern, img) 50 51 52class 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 105class 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 131class 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.ref_img = img_create('ref') 137 self.vm.add_drive(self.test_img) 138 self.vm.launch() 139 140 def tearDown(self): 141 self.vm.shutdown() 142 try_remove(self.test_img) 143 try_remove(self.dest_img) 144 try_remove(self.ref_img) 145 146 def hmp_io_writes(self, drive, patterns): 147 for pattern in patterns: 148 self.vm.hmp_qemu_io(drive, 'write -P%s %s %s' % pattern) 149 self.vm.hmp_qemu_io(drive, 'flush') 150 151 def qmp_backup_and_wait(self, cmd='drive-backup', serror=None, 152 aerror=None, **kwargs): 153 if not self.qmp_backup(cmd, serror, **kwargs): 154 return False 155 return self.qmp_backup_wait(kwargs['device'], aerror) 156 157 def qmp_backup(self, cmd='drive-backup', 158 error=None, **kwargs): 159 self.assertTrue('device' in kwargs) 160 res = self.vm.qmp(cmd, **kwargs) 161 if error: 162 self.assert_qmp(res, 'error/desc', error) 163 return False 164 self.assert_qmp(res, 'return', {}) 165 return True 166 167 def qmp_backup_wait(self, device, error=None): 168 event = self.vm.event_wait(name="BLOCK_JOB_COMPLETED", 169 match={'data': {'device': device}}) 170 self.assertNotEqual(event, None) 171 try: 172 failure = self.dictpath(event, 'data/error') 173 except AssertionError: 174 # Backup succeeded. 175 self.assert_qmp(event, 'data/offset', event['data']['len']) 176 return True 177 else: 178 # Failure. 179 self.assert_qmp(event, 'data/error', qerror) 180 return False 181 182 def test_overlapping_writes(self): 183 # Write something to back up 184 self.hmp_io_writes('drive0', [('42', '0M', '2M')]) 185 186 # Create a reference backup 187 self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt, 188 sync='full', target=self.ref_img, 189 auto_dismiss=False) 190 res = self.vm.qmp('block-job-dismiss', id='drive0') 191 self.assert_qmp(res, 'return', {}) 192 193 # Now to the test backup: We simulate the following guest 194 # writes: 195 # (1) [1M + 64k, 1M + 128k): Afterwards, everything in that 196 # area should be in the target image, and we must not copy 197 # it again (because the source image has changed now) 198 # (64k is the job's cluster size) 199 # (2) [1M, 2M): The backup job must not get overeager. It 200 # must copy [1M, 1M + 64k) and [1M + 128k, 2M) separately, 201 # but not the area in between. 202 203 self.qmp_backup(device='drive0', format=iotests.imgfmt, sync='full', 204 target=self.dest_img, speed=1, auto_dismiss=False) 205 206 self.hmp_io_writes('drive0', [('23', '%ik' % (1024 + 64), '64k'), 207 ('66', '1M', '1M')]) 208 209 # Let the job complete 210 res = self.vm.qmp('block-job-set-speed', device='drive0', speed=0) 211 self.assert_qmp(res, 'return', {}) 212 self.qmp_backup_wait('drive0') 213 res = self.vm.qmp('block-job-dismiss', id='drive0') 214 self.assert_qmp(res, 'return', {}) 215 216 self.assertTrue(iotests.compare_images(self.ref_img, self.dest_img), 217 'target image does not match reference image') 218 219 def test_dismiss_false(self): 220 res = self.vm.qmp('query-block-jobs') 221 self.assert_qmp(res, 'return', []) 222 self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt, 223 sync='full', target=self.dest_img, 224 auto_dismiss=True) 225 res = self.vm.qmp('query-block-jobs') 226 self.assert_qmp(res, 'return', []) 227 228 def test_dismiss_true(self): 229 res = self.vm.qmp('query-block-jobs') 230 self.assert_qmp(res, 'return', []) 231 self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt, 232 sync='full', target=self.dest_img, 233 auto_dismiss=False) 234 res = self.vm.qmp('query-block-jobs') 235 self.assert_qmp(res, 'return[0]/status', 'concluded') 236 res = self.vm.qmp('block-job-dismiss', id='drive0') 237 self.assert_qmp(res, 'return', {}) 238 res = self.vm.qmp('query-block-jobs') 239 self.assert_qmp(res, 'return', []) 240 241 def test_dismiss_bad_id(self): 242 res = self.vm.qmp('query-block-jobs') 243 self.assert_qmp(res, 'return', []) 244 res = self.vm.qmp('block-job-dismiss', id='foobar') 245 self.assert_qmp(res, 'error/class', 'DeviceNotActive') 246 247 def test_dismiss_collision(self): 248 res = self.vm.qmp('query-block-jobs') 249 self.assert_qmp(res, 'return', []) 250 self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt, 251 sync='full', target=self.dest_img, 252 auto_dismiss=False) 253 res = self.vm.qmp('query-block-jobs') 254 self.assert_qmp(res, 'return[0]/status', 'concluded') 255 # Leave zombie job un-dismissed, observe a failure: 256 res = self.qmp_backup_and_wait(serror="Node 'drive0' is busy: block device is in use by block job: backup", 257 device='drive0', format=iotests.imgfmt, 258 sync='full', target=self.dest_img, 259 auto_dismiss=False) 260 self.assertEqual(res, False) 261 # OK, dismiss the zombie. 262 res = self.vm.qmp('block-job-dismiss', id='drive0') 263 self.assert_qmp(res, 'return', {}) 264 res = self.vm.qmp('query-block-jobs') 265 self.assert_qmp(res, 'return', []) 266 # Ensure it's really gone. 267 self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt, 268 sync='full', target=self.dest_img, 269 auto_dismiss=False) 270 271 def dismissal_failure(self, dismissal_opt): 272 res = self.vm.qmp('query-block-jobs') 273 self.assert_qmp(res, 'return', []) 274 # Give blkdebug something to chew on 275 self.hmp_io_writes('drive0', 276 (('0x9a', 0, 512), 277 ('0x55', '8M', '352k'), 278 ('0x78', '15872k', '1M'))) 279 # Add destination node via blkdebug 280 res = self.vm.qmp('blockdev-add', 281 node_name='target0', 282 driver=iotests.imgfmt, 283 file={ 284 'driver': 'blkdebug', 285 'image': { 286 'driver': 'file', 287 'filename': self.dest_img 288 }, 289 'inject-error': [{ 290 'event': 'write_aio', 291 'errno': 5, 292 'immediately': False, 293 'once': True 294 }], 295 }) 296 self.assert_qmp(res, 'return', {}) 297 298 res = self.qmp_backup(cmd='blockdev-backup', 299 device='drive0', target='target0', 300 on_target_error='stop', 301 sync='full', 302 auto_dismiss=dismissal_opt) 303 self.assertTrue(res) 304 event = self.vm.event_wait(name="BLOCK_JOB_ERROR", 305 match={'data': {'device': 'drive0'}}) 306 self.assertNotEqual(event, None) 307 # OK, job should be wedged 308 res = self.vm.qmp('query-block-jobs') 309 self.assert_qmp(res, 'return[0]/status', 'paused') 310 res = self.vm.qmp('block-job-dismiss', id='drive0') 311 self.assert_qmp(res, 'error/desc', 312 "Job 'drive0' in state 'paused' cannot accept" 313 " command verb 'dismiss'") 314 res = self.vm.qmp('query-block-jobs') 315 self.assert_qmp(res, 'return[0]/status', 'paused') 316 # OK, unstick job and move forward. 317 res = self.vm.qmp('block-job-resume', device='drive0') 318 self.assert_qmp(res, 'return', {}) 319 # And now we need to wait for it to conclude; 320 res = self.qmp_backup_wait(device='drive0') 321 self.assertTrue(res) 322 if not dismissal_opt: 323 # Job should now be languishing: 324 res = self.vm.qmp('query-block-jobs') 325 self.assert_qmp(res, 'return[0]/status', 'concluded') 326 res = self.vm.qmp('block-job-dismiss', id='drive0') 327 self.assert_qmp(res, 'return', {}) 328 res = self.vm.qmp('query-block-jobs') 329 self.assert_qmp(res, 'return', []) 330 331 def test_dismiss_premature(self): 332 self.dismissal_failure(False) 333 334 def test_dismiss_erroneous(self): 335 self.dismissal_failure(True) 336 337if __name__ == '__main__': 338 iotests.main(supported_fmts=['qcow2', 'qed']) 339