1#!/usr/bin/env python3 2# group: rw 3# 4# Test cases for the QMP 'x-blockdev-reopen' command 5# 6# Copyright (C) 2018-2019 Igalia, S.L. 7# Author: Alberto Garcia <berto@igalia.com> 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 os 24import re 25import iotests 26import copy 27import json 28from iotests import qemu_img, qemu_io 29 30hd_path = [ 31 os.path.join(iotests.test_dir, 'hd0.img'), 32 os.path.join(iotests.test_dir, 'hd1.img'), 33 os.path.join(iotests.test_dir, 'hd2.img') 34] 35 36def hd_opts(idx): 37 return {'driver': iotests.imgfmt, 38 'node-name': 'hd%d' % idx, 39 'file': {'driver': 'file', 40 'node-name': 'hd%d-file' % idx, 41 'filename': hd_path[idx] } } 42 43class TestBlockdevReopen(iotests.QMPTestCase): 44 total_io_cmds = 0 45 46 def setUp(self): 47 qemu_img('create', '-f', iotests.imgfmt, hd_path[0], '3M') 48 qemu_img('create', '-f', iotests.imgfmt, '-b', hd_path[0], 49 '-F', iotests.imgfmt, hd_path[1]) 50 qemu_img('create', '-f', iotests.imgfmt, hd_path[2], '3M') 51 qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa0 0 1M', hd_path[0]) 52 qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa1 1M 1M', hd_path[1]) 53 qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa2 2M 1M', hd_path[2]) 54 self.vm = iotests.VM() 55 self.vm.launch() 56 57 def tearDown(self): 58 self.vm.shutdown() 59 self.check_qemu_io_errors() 60 os.remove(hd_path[0]) 61 os.remove(hd_path[1]) 62 os.remove(hd_path[2]) 63 64 # The output of qemu-io is not returned by vm.hmp_qemu_io() but 65 # it's stored in the log and can only be read when the VM has been 66 # shut down. This function runs qemu-io and keeps track of the 67 # number of times it's been called. 68 def run_qemu_io(self, img, cmd): 69 result = self.vm.hmp_qemu_io(img, cmd) 70 self.assert_qmp(result, 'return', '') 71 self.total_io_cmds += 1 72 73 # Once the VM is shut down we can parse the log and see if qemu-io 74 # ran without errors. 75 def check_qemu_io_errors(self): 76 self.assertFalse(self.vm.is_running()) 77 found = 0 78 log = self.vm.get_log() 79 for line in log.split("\n"): 80 if line.startswith("Pattern verification failed"): 81 raise Exception("%s (command #%d)" % (line, found)) 82 if re.match("read .*/.* bytes at offset", line): 83 found += 1 84 self.assertEqual(found, self.total_io_cmds, 85 "Expected output of %d qemu-io commands, found %d" % 86 (found, self.total_io_cmds)) 87 88 # Run x-blockdev-reopen with 'opts' but applying 'newopts' 89 # on top of it. The original 'opts' dict is unmodified 90 def reopen(self, opts, newopts = {}, errmsg = None): 91 opts = copy.deepcopy(opts) 92 93 # Apply the changes from 'newopts' on top of 'opts' 94 for key in newopts: 95 value = newopts[key] 96 # If key has the form "foo.bar" then we need to do 97 # opts["foo"]["bar"] = value, not opts["foo.bar"] = value 98 subdict = opts 99 while key.find('.') != -1: 100 [prefix, key] = key.split('.', 1) 101 subdict = opts[prefix] 102 subdict[key] = value 103 104 result = self.vm.qmp('x-blockdev-reopen', conv_keys = False, **opts) 105 if errmsg: 106 self.assert_qmp(result, 'error/class', 'GenericError') 107 self.assert_qmp(result, 'error/desc', errmsg) 108 else: 109 self.assert_qmp(result, 'return', {}) 110 111 112 # Run query-named-block-nodes and return the specified entry 113 def get_node(self, node_name): 114 result = self.vm.qmp('query-named-block-nodes') 115 for node in result['return']: 116 if node['node-name'] == node_name: 117 return node 118 return None 119 120 # Run 'query-named-block-nodes' and compare its output with the 121 # value passed by the user in 'graph' 122 def check_node_graph(self, graph): 123 result = self.vm.qmp('query-named-block-nodes') 124 self.assertEqual(json.dumps(graph, sort_keys=True), 125 json.dumps(result, sort_keys=True)) 126 127 # This test opens one single disk image (without backing files) 128 # and tries to reopen it with illegal / incorrect parameters. 129 def test_incorrect_parameters_single_file(self): 130 # Open 'hd0' only (no backing files) 131 opts = hd_opts(0) 132 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 133 self.assert_qmp(result, 'return', {}) 134 original_graph = self.vm.qmp('query-named-block-nodes') 135 136 # We can reopen the image passing the same options 137 self.reopen(opts) 138 139 # We can also reopen passing a child reference in 'file' 140 self.reopen(opts, {'file': 'hd0-file'}) 141 142 # We cannot change any of these 143 self.reopen(opts, {'node-name': 'not-found'}, "Cannot find node named 'not-found'") 144 self.reopen(opts, {'node-name': ''}, "Cannot find node named ''") 145 self.reopen(opts, {'node-name': None}, "Invalid parameter type for 'node-name', expected: string") 146 self.reopen(opts, {'driver': 'raw'}, "Cannot change the option 'driver'") 147 self.reopen(opts, {'driver': ''}, "Invalid parameter ''") 148 self.reopen(opts, {'driver': None}, "Invalid parameter type for 'driver', expected: string") 149 self.reopen(opts, {'file': 'not-found'}, "Cannot change the option 'file'") 150 self.reopen(opts, {'file': ''}, "Cannot change the option 'file'") 151 self.reopen(opts, {'file': None}, "Invalid parameter type for 'file', expected: BlockdevRef") 152 self.reopen(opts, {'file.node-name': 'newname'}, "Cannot change the option 'node-name'") 153 self.reopen(opts, {'file.driver': 'host_device'}, "Cannot change the option 'driver'") 154 self.reopen(opts, {'file.filename': hd_path[1]}, "Cannot change the option 'filename'") 155 self.reopen(opts, {'file.aio': 'native'}, "Cannot change the option 'aio'") 156 self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") 157 self.reopen(opts, {'file.filename': None}, "Invalid parameter type for 'file.filename', expected: string") 158 159 # node-name is optional in BlockdevOptions, but x-blockdev-reopen needs it 160 del opts['node-name'] 161 self.reopen(opts, {}, "Node name not specified") 162 163 # Check that nothing has changed 164 self.check_node_graph(original_graph) 165 166 # Remove the node 167 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 168 self.assert_qmp(result, 'return', {}) 169 170 # This test opens an image with a backing file and tries to reopen 171 # it with illegal / incorrect parameters. 172 def test_incorrect_parameters_backing_file(self): 173 # Open hd1 omitting the backing options (hd0 will be opened 174 # with the default options) 175 opts = hd_opts(1) 176 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 177 self.assert_qmp(result, 'return', {}) 178 original_graph = self.vm.qmp('query-named-block-nodes') 179 180 # We can't reopen the image passing the same options, 'backing' is mandatory 181 self.reopen(opts, {}, "backing is missing for 'hd1'") 182 183 # Everything works if we pass 'backing' using the existing node name 184 for node in original_graph['return']: 185 if node['drv'] == iotests.imgfmt and node['file'] == hd_path[0]: 186 backing_node_name = node['node-name'] 187 self.reopen(opts, {'backing': backing_node_name}) 188 189 # We can't use a non-existing or empty (non-NULL) node as the backing image 190 self.reopen(opts, {'backing': 'not-found'}, "Cannot find device= nor node_name=not-found") 191 self.reopen(opts, {'backing': ''}, "Cannot find device= nor node_name=") 192 193 # We can reopen the image just fine if we specify the backing options 194 opts['backing'] = {'driver': iotests.imgfmt, 195 'file': {'driver': 'file', 196 'filename': hd_path[0]}} 197 self.reopen(opts) 198 199 # We cannot change any of these options 200 self.reopen(opts, {'backing.node-name': 'newname'}, "Cannot change the option 'node-name'") 201 self.reopen(opts, {'backing.driver': 'raw'}, "Cannot change the option 'driver'") 202 self.reopen(opts, {'backing.file.node-name': 'newname'}, "Cannot change the option 'node-name'") 203 self.reopen(opts, {'backing.file.driver': 'host_device'}, "Cannot change the option 'driver'") 204 205 # Check that nothing has changed since the beginning 206 self.check_node_graph(original_graph) 207 208 # Remove the node 209 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 210 self.assert_qmp(result, 'return', {}) 211 212 # Reopen an image several times changing some of its options 213 def test_reopen(self): 214 # Check whether the filesystem supports O_DIRECT 215 if 'O_DIRECT' in qemu_io('-f', 'raw', '-t', 'none', '-c', 'quit', hd_path[0]): 216 supports_direct = False 217 else: 218 supports_direct = True 219 220 # Open the hd1 image passing all backing options 221 opts = hd_opts(1) 222 opts['backing'] = hd_opts(0) 223 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 224 self.assert_qmp(result, 'return', {}) 225 original_graph = self.vm.qmp('query-named-block-nodes') 226 227 # We can reopen the image passing the same options 228 self.reopen(opts) 229 230 # Reopen in read-only mode 231 self.assert_qmp(self.get_node('hd1'), 'ro', False) 232 233 self.reopen(opts, {'read-only': True}) 234 self.assert_qmp(self.get_node('hd1'), 'ro', True) 235 self.reopen(opts) 236 self.assert_qmp(self.get_node('hd1'), 'ro', False) 237 238 # Change the cache options 239 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 240 self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) 241 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) 242 self.reopen(opts, {'cache': { 'direct': supports_direct, 'no-flush': True }}) 243 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 244 self.assert_qmp(self.get_node('hd1'), 'cache/direct', supports_direct) 245 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', True) 246 247 # Reopen again with the original options 248 self.reopen(opts) 249 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 250 self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) 251 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) 252 253 # Change 'detect-zeroes' and 'discard' 254 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') 255 self.reopen(opts, {'detect-zeroes': 'on'}) 256 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 257 self.reopen(opts, {'detect-zeroes': 'unmap'}, 258 "setting detect-zeroes to unmap is not allowed " + 259 "without setting discard operation to unmap") 260 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 261 self.reopen(opts, {'detect-zeroes': 'unmap', 'discard': 'unmap'}) 262 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'unmap') 263 self.reopen(opts) 264 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') 265 266 # Changing 'force-share' is currently not supported 267 self.reopen(opts, {'force-share': True}, "Cannot change the option 'force-share'") 268 269 # Change some qcow2-specific options 270 # No way to test for success other than checking the return message 271 if iotests.imgfmt == 'qcow2': 272 self.reopen(opts, {'l2-cache-entry-size': 128 * 1024}, 273 "L2 cache entry size must be a power of two "+ 274 "between 512 and the cluster size (65536)") 275 self.reopen(opts, {'l2-cache-size': 1024 * 1024, 276 'cache-size': 512 * 1024}, 277 "l2-cache-size may not exceed cache-size") 278 self.reopen(opts, {'l2-cache-size': 4 * 1024 * 1024, 279 'refcount-cache-size': 4 * 1024 * 1024, 280 'l2-cache-entry-size': 32 * 1024}) 281 self.reopen(opts, {'pass-discard-request': True}) 282 283 # Check that nothing has changed since the beginning 284 # (from the parameters that we can check) 285 self.check_node_graph(original_graph) 286 287 # Check that the node names (other than the top-level one) are optional 288 del opts['file']['node-name'] 289 del opts['backing']['node-name'] 290 del opts['backing']['file']['node-name'] 291 self.reopen(opts) 292 self.check_node_graph(original_graph) 293 294 # Reopen setting backing = null, this removes the backing image from the chain 295 self.reopen(opts, {'backing': None}) 296 self.assert_qmp_absent(self.get_node('hd1'), 'image/backing-image') 297 298 # Open the 'hd0' image 299 result = self.vm.qmp('blockdev-add', conv_keys = False, **hd_opts(0)) 300 self.assert_qmp(result, 'return', {}) 301 302 # Reopen the hd1 image setting 'hd0' as its backing image 303 self.reopen(opts, {'backing': 'hd0'}) 304 self.assert_qmp(self.get_node('hd1'), 'image/backing-image/filename', hd_path[0]) 305 306 # Check that nothing has changed since the beginning 307 self.reopen(hd_opts(0), {'read-only': True}) 308 self.check_node_graph(original_graph) 309 310 # The backing file (hd0) is now a reference, we cannot change backing.* anymore 311 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 312 313 # We can't remove 'hd0' while it's a backing image of 'hd1' 314 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 315 self.assert_qmp(result, 'error/class', 'GenericError') 316 self.assert_qmp(result, 'error/desc', "Node 'hd0' is busy: node is used as backing hd of 'hd1'") 317 318 # But we can remove both nodes if done in the proper order 319 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 320 self.assert_qmp(result, 'return', {}) 321 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 322 self.assert_qmp(result, 'return', {}) 323 324 # Reopen a raw image and see the effect of changing the 'offset' option 325 def test_reopen_raw(self): 326 opts = {'driver': 'raw', 'node-name': 'hd0', 327 'file': { 'driver': 'file', 328 'filename': hd_path[0], 329 'node-name': 'hd0-file' } } 330 331 # First we create a 2MB raw file, and fill each half with a 332 # different value 333 qemu_img('create', '-f', 'raw', hd_path[0], '2M') 334 qemu_io('-f', 'raw', '-c', 'write -P 0xa0 0 1M', hd_path[0]) 335 qemu_io('-f', 'raw', '-c', 'write -P 0xa1 1M 1M', hd_path[0]) 336 337 # Open the raw file with QEMU 338 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 339 self.assert_qmp(result, 'return', {}) 340 341 # Read 1MB from offset 0 342 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 343 344 # Reopen the image with a 1MB offset. 345 # Now the results are different 346 self.reopen(opts, {'offset': 1024*1024}) 347 self.run_qemu_io("hd0", "read -P 0xa1 0 1M") 348 349 # Reopen again with the original options. 350 # We get the original results again 351 self.reopen(opts) 352 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 353 354 # Remove the block device 355 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 356 self.assert_qmp(result, 'return', {}) 357 358 # Omitting an option should reset it to the default value, but if 359 # an option cannot be changed it shouldn't be possible to reset it 360 # to its default value either 361 def test_reset_default_values(self): 362 opts = {'driver': 'qcow2', 'node-name': 'hd0', 363 'file': { 'driver': 'file', 364 'filename': hd_path[0], 365 'x-check-cache-dropped': True, # This one can be changed 366 'locking': 'off', # This one can NOT be changed 367 'node-name': 'hd0-file' } } 368 369 # Open the file with QEMU 370 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 371 self.assert_qmp(result, 'return', {}) 372 373 # file.x-check-cache-dropped can be changed... 374 self.reopen(opts, { 'file.x-check-cache-dropped': False }) 375 # ...and dropped completely (resetting to the default value) 376 del opts['file']['x-check-cache-dropped'] 377 self.reopen(opts) 378 379 # file.locking cannot be changed nor reset to the default value 380 self.reopen(opts, { 'file.locking': 'on' }, "Cannot change the option 'locking'") 381 del opts['file']['locking'] 382 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 383 # But we can reopen it if we maintain its previous value 384 self.reopen(opts, { 'file.locking': 'off' }) 385 386 # Remove the block device 387 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 388 self.assert_qmp(result, 'return', {}) 389 390 # This test modifies the node graph a few times by changing the 391 # 'backing' option on reopen and verifies that the guest data that 392 # is read afterwards is consistent with the graph changes. 393 def test_io_with_graph_changes(self): 394 opts = [] 395 396 # Open hd0, hd1 and hd2 without any backing image 397 for i in range(3): 398 opts.append(hd_opts(i)) 399 opts[i]['backing'] = None 400 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) 401 self.assert_qmp(result, 'return', {}) 402 403 # hd0 404 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 405 self.run_qemu_io("hd0", "read -P 0 1M 1M") 406 self.run_qemu_io("hd0", "read -P 0 2M 1M") 407 408 # hd1 <- hd0 409 self.reopen(opts[0], {'backing': 'hd1'}) 410 411 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 412 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 413 self.run_qemu_io("hd0", "read -P 0 2M 1M") 414 415 # hd1 <- hd0 , hd1 <- hd2 416 self.reopen(opts[2], {'backing': 'hd1'}) 417 418 self.run_qemu_io("hd2", "read -P 0 0 1M") 419 self.run_qemu_io("hd2", "read -P 0xa1 1M 1M") 420 self.run_qemu_io("hd2", "read -P 0xa2 2M 1M") 421 422 # hd1 <- hd2 <- hd0 423 self.reopen(opts[0], {'backing': 'hd2'}) 424 425 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 426 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 427 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 428 429 # hd2 <- hd0 430 self.reopen(opts[2], {'backing': None}) 431 432 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 433 self.run_qemu_io("hd0", "read -P 0 1M 1M") 434 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 435 436 # hd2 <- hd1 <- hd0 437 self.reopen(opts[1], {'backing': 'hd2'}) 438 self.reopen(opts[0], {'backing': 'hd1'}) 439 440 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 441 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 442 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 443 444 # Illegal operation: hd2 is a child of hd1 445 self.reopen(opts[2], {'backing': 'hd1'}, 446 "Making 'hd1' a backing file of 'hd2' would create a cycle") 447 448 # hd2 <- hd0, hd2 <- hd1 449 self.reopen(opts[0], {'backing': 'hd2'}) 450 451 self.run_qemu_io("hd1", "read -P 0 0 1M") 452 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 453 self.run_qemu_io("hd1", "read -P 0xa2 2M 1M") 454 455 # More illegal operations 456 self.reopen(opts[2], {'backing': 'hd1'}, 457 "Making 'hd1' a backing file of 'hd2' would create a cycle") 458 self.reopen(opts[2], {'file': 'hd0-file'}, "Cannot change the option 'file'") 459 460 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 461 self.assert_qmp(result, 'error/class', 'GenericError') 462 self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") 463 464 # hd1 doesn't have a backing file now 465 self.reopen(opts[1], {'backing': None}) 466 467 self.run_qemu_io("hd1", "read -P 0 0 1M") 468 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 469 self.run_qemu_io("hd1", "read -P 0 2M 1M") 470 471 # We can't remove the 'backing' option if the image has a 472 # default backing file 473 del opts[1]['backing'] 474 self.reopen(opts[1], {}, "backing is missing for 'hd1'") 475 476 self.run_qemu_io("hd1", "read -P 0 0 1M") 477 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 478 self.run_qemu_io("hd1", "read -P 0 2M 1M") 479 480 # This test verifies that we can't change the children of a block 481 # device during a reopen operation in a way that would create 482 # cycles in the node graph 483 @iotests.skip_if_unsupported(['blkverify']) 484 def test_graph_cycles(self): 485 opts = [] 486 487 # Open all three images without backing file 488 for i in range(3): 489 opts.append(hd_opts(i)) 490 opts[i]['backing'] = None 491 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) 492 self.assert_qmp(result, 'return', {}) 493 494 # hd1 <- hd0, hd1 <- hd2 495 self.reopen(opts[0], {'backing': 'hd1'}) 496 self.reopen(opts[2], {'backing': 'hd1'}) 497 498 # Illegal: hd2 is backed by hd1 499 self.reopen(opts[1], {'backing': 'hd2'}, 500 "Making 'hd2' a backing file of 'hd1' would create a cycle") 501 502 # hd1 <- hd0 <- hd2 503 self.reopen(opts[2], {'backing': 'hd0'}) 504 505 # Illegal: hd2 is backed by hd0, which is backed by hd1 506 self.reopen(opts[1], {'backing': 'hd2'}, 507 "Making 'hd2' a backing file of 'hd1' would create a cycle") 508 509 # Illegal: hd1 cannot point to itself 510 self.reopen(opts[1], {'backing': 'hd1'}, 511 "Making 'hd1' a backing file of 'hd1' would create a cycle") 512 513 # Remove all backing files 514 self.reopen(opts[0]) 515 self.reopen(opts[2]) 516 517 ########################################## 518 # Add a blkverify node using hd0 and hd1 # 519 ########################################## 520 bvopts = {'driver': 'blkverify', 521 'node-name': 'bv', 522 'test': 'hd0', 523 'raw': 'hd1'} 524 result = self.vm.qmp('blockdev-add', conv_keys = False, **bvopts) 525 self.assert_qmp(result, 'return', {}) 526 527 # blkverify doesn't currently allow reopening. TODO: implement this 528 self.reopen(bvopts, {}, "Block format 'blkverify' used by node 'bv'" + 529 " does not support reopening files") 530 531 # Illegal: hd0 is a child of the blkverify node 532 self.reopen(opts[0], {'backing': 'bv'}, 533 "Making 'bv' a backing file of 'hd0' would create a cycle") 534 535 # Delete the blkverify node 536 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bv') 537 self.assert_qmp(result, 'return', {}) 538 539 # Misc reopen tests with different block drivers 540 @iotests.skip_if_unsupported(['quorum', 'throttle']) 541 def test_misc_drivers(self): 542 #################### 543 ###### quorum ###### 544 #################### 545 for i in range(3): 546 opts = hd_opts(i) 547 # Open all three images without backing file 548 opts['backing'] = None 549 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 550 self.assert_qmp(result, 'return', {}) 551 552 opts = {'driver': 'quorum', 553 'node-name': 'quorum0', 554 'children': ['hd0', 'hd1', 'hd2'], 555 'vote-threshold': 2} 556 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 557 self.assert_qmp(result, 'return', {}) 558 559 # Quorum doesn't currently allow reopening. TODO: implement this 560 self.reopen(opts, {}, "Block format 'quorum' used by node 'quorum0'" + 561 " does not support reopening files") 562 563 # You can't make quorum0 a backing file of hd0: 564 # hd0 is already a child of quorum0. 565 self.reopen(hd_opts(0), {'backing': 'quorum0'}, 566 "Making 'quorum0' a backing file of 'hd0' would create a cycle") 567 568 # Delete quorum0 569 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'quorum0') 570 self.assert_qmp(result, 'return', {}) 571 572 # Delete hd0, hd1 and hd2 573 for i in range(3): 574 result = self.vm.qmp('blockdev-del', conv_keys = True, 575 node_name = 'hd%d' % i) 576 self.assert_qmp(result, 'return', {}) 577 578 ###################### 579 ###### blkdebug ###### 580 ###################### 581 opts = {'driver': 'blkdebug', 582 'node-name': 'bd', 583 'config': '/dev/null', 584 'image': hd_opts(0)} 585 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 586 self.assert_qmp(result, 'return', {}) 587 588 # blkdebug allows reopening if we keep the same options 589 self.reopen(opts) 590 591 # but it currently does not allow changes 592 self.reopen(opts, {'image': 'hd1'}, "Cannot change the option 'image'") 593 self.reopen(opts, {'align': 33554432}, "Cannot change the option 'align'") 594 self.reopen(opts, {'config': '/non/existent'}, "Cannot change the option 'config'") 595 del opts['config'] 596 self.reopen(opts, {}, "Option 'config' cannot be reset to its default value") 597 598 # Delete the blkdebug node 599 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bd') 600 self.assert_qmp(result, 'return', {}) 601 602 ################## 603 ###### null ###### 604 ################## 605 opts = {'driver': 'null-co', 'node-name': 'root', 'size': 1024} 606 607 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 608 self.assert_qmp(result, 'return', {}) 609 610 # 1 << 30 is the default value, but we cannot change it explicitly 611 self.reopen(opts, {'size': (1 << 30)}, "Cannot change the option 'size'") 612 613 # We cannot change 'size' back to its default value either 614 del opts['size'] 615 self.reopen(opts, {}, "Option 'size' cannot be reset to its default value") 616 617 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'root') 618 self.assert_qmp(result, 'return', {}) 619 620 ################## 621 ###### file ###### 622 ################## 623 opts = hd_opts(0) 624 opts['file']['locking'] = 'on' 625 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 626 self.assert_qmp(result, 'return', {}) 627 628 # 'locking' cannot be changed 629 del opts['file']['locking'] 630 self.reopen(opts, {'file.locking': 'on'}) 631 self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") 632 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 633 634 # Trying to reopen the 'file' node directly does not make a difference 635 opts = opts['file'] 636 self.reopen(opts, {'locking': 'on'}) 637 self.reopen(opts, {'locking': 'off'}, "Cannot change the option 'locking'") 638 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 639 640 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 641 self.assert_qmp(result, 'return', {}) 642 643 ###################### 644 ###### throttle ###### 645 ###################### 646 opts = { 'qom-type': 'throttle-group', 'id': 'group0', 647 'props': { 'limits': { 'iops-total': 1000 } } } 648 result = self.vm.qmp('object-add', conv_keys = False, **opts) 649 self.assert_qmp(result, 'return', {}) 650 651 opts = { 'qom-type': 'throttle-group', 'id': 'group1', 652 'props': { 'limits': { 'iops-total': 2000 } } } 653 result = self.vm.qmp('object-add', conv_keys = False, **opts) 654 self.assert_qmp(result, 'return', {}) 655 656 # Add a throttle filter with group = group0 657 opts = { 'driver': 'throttle', 'node-name': 'throttle0', 658 'throttle-group': 'group0', 'file': hd_opts(0) } 659 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 660 self.assert_qmp(result, 'return', {}) 661 662 # We can reopen it if we keep the same options 663 self.reopen(opts) 664 665 # We can also reopen if 'file' is a reference to the child 666 self.reopen(opts, {'file': 'hd0'}) 667 668 # This is illegal 669 self.reopen(opts, {'throttle-group': 'notfound'}, "Throttle group 'notfound' does not exist") 670 671 # But it's possible to change the group to group1 672 self.reopen(opts, {'throttle-group': 'group1'}) 673 674 # Now group1 is in use, it cannot be deleted 675 result = self.vm.qmp('object-del', id = 'group1') 676 self.assert_qmp(result, 'error/class', 'GenericError') 677 self.assert_qmp(result, 'error/desc', "object 'group1' is in use, can not be deleted") 678 679 # Default options, this switches the group back to group0 680 self.reopen(opts) 681 682 # So now we cannot delete group0 683 result = self.vm.qmp('object-del', id = 'group0') 684 self.assert_qmp(result, 'error/class', 'GenericError') 685 self.assert_qmp(result, 'error/desc', "object 'group0' is in use, can not be deleted") 686 687 # But group1 is free this time, and it can be deleted 688 result = self.vm.qmp('object-del', id = 'group1') 689 self.assert_qmp(result, 'return', {}) 690 691 # Let's delete the filter node 692 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'throttle0') 693 self.assert_qmp(result, 'return', {}) 694 695 # And we can finally get rid of group0 696 result = self.vm.qmp('object-del', id = 'group0') 697 self.assert_qmp(result, 'return', {}) 698 699 # If an image has a backing file then the 'backing' option must be 700 # passed on reopen. We don't allow leaving the option out in this 701 # case because it's unclear what the correct semantics would be. 702 def test_missing_backing_options_1(self): 703 # hd2 704 opts = hd_opts(2) 705 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 706 self.assert_qmp(result, 'return', {}) 707 708 # hd0 709 opts = hd_opts(0) 710 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 711 self.assert_qmp(result, 'return', {}) 712 713 # hd0 has no backing file: we can omit the 'backing' option 714 self.reopen(opts) 715 716 # hd2 <- hd0 717 self.reopen(opts, {'backing': 'hd2'}) 718 719 # hd0 has a backing file: we must set the 'backing' option 720 self.reopen(opts, {}, "backing is missing for 'hd0'") 721 722 # hd2 can't be removed because it's the backing file of hd0 723 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 724 self.assert_qmp(result, 'error/class', 'GenericError') 725 self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") 726 727 # Detach hd2 from hd0. 728 self.reopen(opts, {'backing': None}) 729 730 # Without a backing file, we can omit 'backing' again 731 self.reopen(opts) 732 733 # Remove both hd0 and hd2 734 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 735 self.assert_qmp(result, 'return', {}) 736 737 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 738 self.assert_qmp(result, 'return', {}) 739 740 # If an image has default backing file (as part of its metadata) 741 # then the 'backing' option must be passed on reopen. We don't 742 # allow leaving the option out in this case because it's unclear 743 # what the correct semantics would be. 744 def test_missing_backing_options_2(self): 745 # hd0 <- hd1 746 # (hd0 is hd1's default backing file) 747 opts = hd_opts(1) 748 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 749 self.assert_qmp(result, 'return', {}) 750 751 # hd1 has a backing file: we can't omit the 'backing' option 752 self.reopen(opts, {}, "backing is missing for 'hd1'") 753 754 # Let's detach the backing file 755 self.reopen(opts, {'backing': None}) 756 757 # No backing file attached to hd1 now, but we still can't omit the 'backing' option 758 self.reopen(opts, {}, "backing is missing for 'hd1'") 759 760 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 761 self.assert_qmp(result, 'return', {}) 762 763 # Test that making 'backing' a reference to an existing child 764 # keeps its current options 765 def test_backing_reference(self): 766 # hd2 <- hd1 <- hd0 767 opts = hd_opts(0) 768 opts['backing'] = hd_opts(1) 769 opts['backing']['backing'] = hd_opts(2) 770 # Enable 'detect-zeroes' on all three nodes 771 opts['detect-zeroes'] = 'on' 772 opts['backing']['detect-zeroes'] = 'on' 773 opts['backing']['backing']['detect-zeroes'] = 'on' 774 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 775 self.assert_qmp(result, 'return', {}) 776 777 # Reopen the chain passing the minimum amount of required options. 778 # By making 'backing' a reference to hd1 (instead of a sub-dict) 779 # we tell QEMU to keep its current set of options. 780 opts = {'driver': iotests.imgfmt, 781 'node-name': 'hd0', 782 'file': 'hd0-file', 783 'backing': 'hd1' } 784 self.reopen(opts) 785 786 # This has reset 'detect-zeroes' on hd0, but not on hd1 and hd2. 787 self.assert_qmp(self.get_node('hd0'), 'detect_zeroes', 'off') 788 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 789 self.assert_qmp(self.get_node('hd2'), 'detect_zeroes', 'on') 790 791 # Test what happens if the graph changes due to other operations 792 # such as block-stream 793 def test_block_stream_1(self): 794 # hd1 <- hd0 795 opts = hd_opts(0) 796 opts['backing'] = hd_opts(1) 797 opts['backing']['backing'] = None 798 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 799 self.assert_qmp(result, 'return', {}) 800 801 # Stream hd1 into hd0 and wait until it's done 802 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', device = 'hd0') 803 self.assert_qmp(result, 'return', {}) 804 self.wait_until_completed(drive = 'stream0') 805 806 # Now we have only hd0 807 self.assertEqual(self.get_node('hd1'), None) 808 809 # We have backing.* options but there's no backing file anymore 810 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 811 812 # If we remove the 'backing' option then we can reopen hd0 just fine 813 del opts['backing'] 814 self.reopen(opts) 815 816 # We can also reopen hd0 if we set 'backing' to null 817 self.reopen(opts, {'backing': None}) 818 819 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 820 self.assert_qmp(result, 'return', {}) 821 822 # Another block_stream test 823 def test_block_stream_2(self): 824 # hd2 <- hd1 <- hd0 825 opts = hd_opts(0) 826 opts['backing'] = hd_opts(1) 827 opts['backing']['backing'] = hd_opts(2) 828 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 829 self.assert_qmp(result, 'return', {}) 830 831 # Stream hd1 into hd0 and wait until it's done 832 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 833 device = 'hd0', base_node = 'hd2') 834 self.assert_qmp(result, 'return', {}) 835 self.wait_until_completed(drive = 'stream0') 836 837 # The chain is hd2 <- hd0 now. hd1 is missing 838 self.assertEqual(self.get_node('hd1'), None) 839 840 # The backing options in the dict were meant for hd1, but we cannot 841 # use them with hd2 because hd1 had a backing file while hd2 does not. 842 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 843 844 # If we remove hd1's options from the dict then things work fine 845 opts['backing'] = opts['backing']['backing'] 846 self.reopen(opts) 847 848 # We can also reopen hd0 if we use a reference to the backing file 849 self.reopen(opts, {'backing': 'hd2'}) 850 851 # But we cannot leave the option out 852 del opts['backing'] 853 self.reopen(opts, {}, "backing is missing for 'hd0'") 854 855 # Now we can delete hd0 (and hd2) 856 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 857 self.assert_qmp(result, 'return', {}) 858 self.assertEqual(self.get_node('hd2'), None) 859 860 # Reopen the chain during a block-stream job (from hd1 to hd0) 861 def test_block_stream_3(self): 862 # hd2 <- hd1 <- hd0 863 opts = hd_opts(0) 864 opts['backing'] = hd_opts(1) 865 opts['backing']['backing'] = hd_opts(2) 866 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 867 self.assert_qmp(result, 'return', {}) 868 869 # hd2 <- hd0 870 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 871 device = 'hd0', base_node = 'hd2', 872 auto_finalize = False) 873 self.assert_qmp(result, 'return', {}) 874 875 # We can remove hd2 while the stream job is ongoing 876 opts['backing']['backing'] = None 877 self.reopen(opts, {}) 878 879 # We can't remove hd1 while the stream job is ongoing 880 opts['backing'] = None 881 self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'") 882 883 self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) 884 885 # Reopen the chain during a block-stream job (from hd2 to hd1) 886 def test_block_stream_4(self): 887 # hd2 <- hd1 <- hd0 888 opts = hd_opts(0) 889 opts['backing'] = hd_opts(1) 890 opts['backing']['backing'] = hd_opts(2) 891 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 892 self.assert_qmp(result, 'return', {}) 893 894 # hd1 <- hd0 895 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 896 device = 'hd1', auto_finalize = False) 897 self.assert_qmp(result, 'return', {}) 898 899 # We can't reopen with the original options because that would 900 # make hd1 read-only and block-stream requires it to be read-write 901 # (Which error message appears depends on whether the stream job is 902 # already done with copying at this point.) 903 self.reopen(opts, {}, 904 ["Can't set node 'hd1' to r/o with copy-on-read enabled", 905 "Cannot make block node read-only, there is a writer on it"]) 906 907 # We can't remove hd2 while the stream job is ongoing 908 opts['backing']['backing'] = None 909 self.reopen(opts, {'backing.read-only': False}, "Cannot change 'backing' link from 'hd1' to 'hd2'") 910 911 # We can detach hd1 from hd0 because it doesn't affect the stream job 912 opts['backing'] = None 913 self.reopen(opts) 914 915 self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) 916 917 # Reopen the chain during a block-commit job (from hd0 to hd2) 918 def test_block_commit_1(self): 919 # hd2 <- hd1 <- hd0 920 opts = hd_opts(0) 921 opts['backing'] = hd_opts(1) 922 opts['backing']['backing'] = hd_opts(2) 923 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 924 self.assert_qmp(result, 'return', {}) 925 926 result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', 927 device = 'hd0') 928 self.assert_qmp(result, 'return', {}) 929 930 # We can't remove hd2 while the commit job is ongoing 931 opts['backing']['backing'] = None 932 self.reopen(opts, {}, "Cannot change 'backing' link from 'hd1' to 'hd2'") 933 934 # We can't remove hd1 while the commit job is ongoing 935 opts['backing'] = None 936 self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'") 937 938 event = self.vm.event_wait(name='BLOCK_JOB_READY') 939 self.assert_qmp(event, 'data/device', 'commit0') 940 self.assert_qmp(event, 'data/type', 'commit') 941 self.assert_qmp_absent(event, 'data/error') 942 943 result = self.vm.qmp('block-job-complete', device='commit0') 944 self.assert_qmp(result, 'return', {}) 945 946 self.wait_until_completed(drive = 'commit0') 947 948 # Reopen the chain during a block-commit job (from hd1 to hd2) 949 def test_block_commit_2(self): 950 # hd2 <- hd1 <- hd0 951 opts = hd_opts(0) 952 opts['backing'] = hd_opts(1) 953 opts['backing']['backing'] = hd_opts(2) 954 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 955 self.assert_qmp(result, 'return', {}) 956 957 result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', 958 device = 'hd0', top_node = 'hd1', 959 auto_finalize = False) 960 self.assert_qmp(result, 'return', {}) 961 962 # We can't remove hd2 while the commit job is ongoing 963 opts['backing']['backing'] = None 964 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 965 966 # We can't remove hd1 while the commit job is ongoing 967 opts['backing'] = None 968 self.reopen(opts, {}, "Cannot change backing link if 'hd0' has an implicit backing file") 969 970 # hd2 <- hd0 971 self.vm.run_job('commit0', auto_finalize = False, auto_dismiss = True) 972 973 self.assert_qmp(self.get_node('hd0'), 'ro', False) 974 self.assertEqual(self.get_node('hd1'), None) 975 self.assert_qmp(self.get_node('hd2'), 'ro', True) 976 977 def run_test_iothreads(self, iothread_a, iothread_b, errmsg = None): 978 opts = hd_opts(0) 979 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 980 self.assert_qmp(result, 'return', {}) 981 982 opts2 = hd_opts(2) 983 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts2) 984 self.assert_qmp(result, 'return', {}) 985 986 result = self.vm.qmp('object-add', qom_type='iothread', id='iothread0') 987 self.assert_qmp(result, 'return', {}) 988 989 result = self.vm.qmp('object-add', qom_type='iothread', id='iothread1') 990 self.assert_qmp(result, 'return', {}) 991 992 result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi0', 993 iothread=iothread_a) 994 self.assert_qmp(result, 'return', {}) 995 996 result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi1', 997 iothread=iothread_b) 998 self.assert_qmp(result, 'return', {}) 999 1000 if iothread_a: 1001 result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd0', 1002 share_rw=True, bus="scsi0.0") 1003 self.assert_qmp(result, 'return', {}) 1004 1005 if iothread_b: 1006 result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd2', 1007 share_rw=True, bus="scsi1.0") 1008 self.assert_qmp(result, 'return', {}) 1009 1010 # Attaching the backing file may or may not work 1011 self.reopen(opts, {'backing': 'hd2'}, errmsg) 1012 1013 # But removing the backing file should always work 1014 self.reopen(opts, {'backing': None}) 1015 1016 self.vm.shutdown() 1017 1018 # We don't allow setting a backing file that uses a different AioContext if 1019 # neither of them can switch to the other AioContext 1020 def test_iothreads_error(self): 1021 self.run_test_iothreads('iothread0', 'iothread1', 1022 "Cannot change iothread of active block backend") 1023 1024 def test_iothreads_compatible_users(self): 1025 self.run_test_iothreads('iothread0', 'iothread0') 1026 1027 def test_iothreads_switch_backing(self): 1028 self.run_test_iothreads('iothread0', None) 1029 1030 def test_iothreads_switch_overlay(self): 1031 self.run_test_iothreads(None, 'iothread0') 1032 1033if __name__ == '__main__': 1034 iotests.activate_logging() 1035 iotests.main(supported_fmts=["qcow2"], 1036 supported_protocols=["file"]) 1037