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|wrote) .*/.* 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 on a list of block devices 89 def reopenMultiple(self, opts, errmsg = None): 90 result = self.vm.qmp('x-blockdev-reopen', conv_keys=False, options=opts) 91 if errmsg: 92 self.assert_qmp(result, 'error/class', 'GenericError') 93 self.assert_qmp(result, 'error/desc', errmsg) 94 else: 95 self.assert_qmp(result, 'return', {}) 96 97 # Run x-blockdev-reopen on a single block device (specified by 98 # 'opts') but applying 'newopts' on top of it. The original 'opts' 99 # dict is unmodified 100 def reopen(self, opts, newopts = {}, errmsg = None): 101 opts = copy.deepcopy(opts) 102 103 # Apply the changes from 'newopts' on top of 'opts' 104 for key in newopts: 105 value = newopts[key] 106 # If key has the form "foo.bar" then we need to do 107 # opts["foo"]["bar"] = value, not opts["foo.bar"] = value 108 subdict = opts 109 while key.find('.') != -1: 110 [prefix, key] = key.split('.', 1) 111 subdict = opts[prefix] 112 subdict[key] = value 113 114 self.reopenMultiple([ opts ], errmsg) 115 116 117 # Run query-named-block-nodes and return the specified entry 118 def get_node(self, node_name): 119 result = self.vm.qmp('query-named-block-nodes') 120 for node in result['return']: 121 if node['node-name'] == node_name: 122 return node 123 return None 124 125 # Run 'query-named-block-nodes' and compare its output with the 126 # value passed by the user in 'graph' 127 def check_node_graph(self, graph): 128 result = self.vm.qmp('query-named-block-nodes') 129 self.assertEqual(json.dumps(graph, sort_keys=True), 130 json.dumps(result, sort_keys=True)) 131 132 # This test opens one single disk image (without backing files) 133 # and tries to reopen it with illegal / incorrect parameters. 134 def test_incorrect_parameters_single_file(self): 135 # Open 'hd0' only (no backing files) 136 opts = hd_opts(0) 137 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 138 self.assert_qmp(result, 'return', {}) 139 original_graph = self.vm.qmp('query-named-block-nodes') 140 141 # We can reopen the image passing the same options 142 self.reopen(opts) 143 144 # We can also reopen passing a child reference in 'file' 145 self.reopen(opts, {'file': 'hd0-file'}) 146 147 # We cannot change any of these 148 self.reopen(opts, {'node-name': 'not-found'}, "Failed to find node with node-name='not-found'") 149 self.reopen(opts, {'node-name': ''}, "Failed to find node with node-name=''") 150 self.reopen(opts, {'node-name': None}, "Invalid parameter type for 'options[0].node-name', expected: string") 151 self.reopen(opts, {'driver': 'raw'}, "Cannot change the option 'driver'") 152 self.reopen(opts, {'driver': ''}, "Invalid parameter ''") 153 self.reopen(opts, {'driver': None}, "Invalid parameter type for 'options[0].driver', expected: string") 154 self.reopen(opts, {'file': 'not-found'}, "Cannot find device='' nor node-name='not-found'") 155 self.reopen(opts, {'file': ''}, "Cannot find device='' nor node-name=''") 156 self.reopen(opts, {'file': None}, "Invalid parameter type for 'file', expected: BlockdevRef") 157 self.reopen(opts, {'file.node-name': 'newname'}, "Cannot change the option 'node-name'") 158 self.reopen(opts, {'file.driver': 'host_device'}, "Cannot change the option 'driver'") 159 self.reopen(opts, {'file.filename': hd_path[1]}, "Cannot change the option 'filename'") 160 self.reopen(opts, {'file.aio': 'native'}, "Cannot change the option 'aio'") 161 self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") 162 self.reopen(opts, {'file.filename': None}, "Invalid parameter type for 'options[0].file.filename', expected: string") 163 164 # node-name is optional in BlockdevOptions, but x-blockdev-reopen needs it 165 del opts['node-name'] 166 self.reopen(opts, {}, "node-name not specified") 167 168 # Check that nothing has changed 169 self.check_node_graph(original_graph) 170 171 # Remove the node 172 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 173 self.assert_qmp(result, 'return', {}) 174 175 # This test opens an image with a backing file and tries to reopen 176 # it with illegal / incorrect parameters. 177 def test_incorrect_parameters_backing_file(self): 178 # Open hd1 omitting the backing options (hd0 will be opened 179 # with the default options) 180 opts = hd_opts(1) 181 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 182 self.assert_qmp(result, 'return', {}) 183 original_graph = self.vm.qmp('query-named-block-nodes') 184 185 # We can't reopen the image passing the same options, 'backing' is mandatory 186 self.reopen(opts, {}, "backing is missing for 'hd1'") 187 188 # Everything works if we pass 'backing' using the existing node name 189 for node in original_graph['return']: 190 if node['drv'] == iotests.imgfmt and node['file'] == hd_path[0]: 191 backing_node_name = node['node-name'] 192 self.reopen(opts, {'backing': backing_node_name}) 193 194 # We can't use a non-existing or empty (non-NULL) node as the backing image 195 self.reopen(opts, {'backing': 'not-found'}, "Cannot find device=\'\' nor node-name=\'not-found\'") 196 self.reopen(opts, {'backing': ''}, "Cannot find device=\'\' nor node-name=\'\'") 197 198 # We can reopen the image just fine if we specify the backing options 199 opts['backing'] = {'driver': iotests.imgfmt, 200 'file': {'driver': 'file', 201 'filename': hd_path[0]}} 202 self.reopen(opts) 203 204 # We cannot change any of these options 205 self.reopen(opts, {'backing.node-name': 'newname'}, "Cannot change the option 'node-name'") 206 self.reopen(opts, {'backing.driver': 'raw'}, "Cannot change the option 'driver'") 207 self.reopen(opts, {'backing.file.node-name': 'newname'}, "Cannot change the option 'node-name'") 208 self.reopen(opts, {'backing.file.driver': 'host_device'}, "Cannot change the option 'driver'") 209 210 # Check that nothing has changed since the beginning 211 self.check_node_graph(original_graph) 212 213 # Remove the node 214 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 215 self.assert_qmp(result, 'return', {}) 216 217 # Reopen an image several times changing some of its options 218 def test_reopen(self): 219 # Check whether the filesystem supports O_DIRECT 220 if 'O_DIRECT' in qemu_io('-f', 'raw', '-t', 'none', '-c', 'quit', hd_path[0]): 221 supports_direct = False 222 else: 223 supports_direct = True 224 225 # Open the hd1 image passing all backing options 226 opts = hd_opts(1) 227 opts['backing'] = hd_opts(0) 228 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 229 self.assert_qmp(result, 'return', {}) 230 original_graph = self.vm.qmp('query-named-block-nodes') 231 232 # We can reopen the image passing the same options 233 self.reopen(opts) 234 235 # Reopen in read-only mode 236 self.assert_qmp(self.get_node('hd1'), 'ro', False) 237 238 self.reopen(opts, {'read-only': True}) 239 self.assert_qmp(self.get_node('hd1'), 'ro', True) 240 self.reopen(opts) 241 self.assert_qmp(self.get_node('hd1'), 'ro', False) 242 243 # Change the cache options 244 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 245 self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) 246 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) 247 self.reopen(opts, {'cache': { 'direct': supports_direct, 'no-flush': True }}) 248 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 249 self.assert_qmp(self.get_node('hd1'), 'cache/direct', supports_direct) 250 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', True) 251 252 # Reopen again with the original options 253 self.reopen(opts) 254 self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) 255 self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) 256 self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) 257 258 # Change 'detect-zeroes' and 'discard' 259 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') 260 self.reopen(opts, {'detect-zeroes': 'on'}) 261 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 262 self.reopen(opts, {'detect-zeroes': 'unmap'}, 263 "setting detect-zeroes to unmap is not allowed " + 264 "without setting discard operation to unmap") 265 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 266 self.reopen(opts, {'detect-zeroes': 'unmap', 'discard': 'unmap'}) 267 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'unmap') 268 self.reopen(opts) 269 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') 270 271 # Changing 'force-share' is currently not supported 272 self.reopen(opts, {'force-share': True}, "Cannot change the option 'force-share'") 273 274 # Change some qcow2-specific options 275 # No way to test for success other than checking the return message 276 if iotests.imgfmt == 'qcow2': 277 self.reopen(opts, {'l2-cache-entry-size': 128 * 1024}, 278 "L2 cache entry size must be a power of two "+ 279 "between 512 and the cluster size (65536)") 280 self.reopen(opts, {'l2-cache-size': 1024 * 1024, 281 'cache-size': 512 * 1024}, 282 "l2-cache-size may not exceed cache-size") 283 self.reopen(opts, {'l2-cache-size': 4 * 1024 * 1024, 284 'refcount-cache-size': 4 * 1024 * 1024, 285 'l2-cache-entry-size': 32 * 1024}) 286 self.reopen(opts, {'pass-discard-request': True}) 287 288 # Check that nothing has changed since the beginning 289 # (from the parameters that we can check) 290 self.check_node_graph(original_graph) 291 292 # Check that the node names (other than the top-level one) are optional 293 del opts['file']['node-name'] 294 del opts['backing']['node-name'] 295 del opts['backing']['file']['node-name'] 296 self.reopen(opts) 297 self.check_node_graph(original_graph) 298 299 # Reopen setting backing = null, this removes the backing image from the chain 300 self.reopen(opts, {'backing': None}) 301 self.assert_qmp_absent(self.get_node('hd1'), 'image/backing-image') 302 303 # Open the 'hd0' image 304 result = self.vm.qmp('blockdev-add', conv_keys = False, **hd_opts(0)) 305 self.assert_qmp(result, 'return', {}) 306 307 # Reopen the hd1 image setting 'hd0' as its backing image 308 self.reopen(opts, {'backing': 'hd0'}) 309 self.assert_qmp(self.get_node('hd1'), 'image/backing-image/filename', hd_path[0]) 310 311 # Check that nothing has changed since the beginning 312 self.reopen(hd_opts(0), {'read-only': True}) 313 self.check_node_graph(original_graph) 314 315 # The backing file (hd0) is now a reference, we cannot change backing.* anymore 316 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 317 318 # We can't remove 'hd0' while it's a backing image of 'hd1' 319 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 320 self.assert_qmp(result, 'error/class', 'GenericError') 321 self.assert_qmp(result, 'error/desc', "Node 'hd0' is busy: node is used as backing hd of 'hd1'") 322 323 # But we can remove both nodes if done in the proper order 324 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 325 self.assert_qmp(result, 'return', {}) 326 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 327 self.assert_qmp(result, 'return', {}) 328 329 # Reopen a raw image and see the effect of changing the 'offset' option 330 def test_reopen_raw(self): 331 opts = {'driver': 'raw', 'node-name': 'hd0', 332 'file': { 'driver': 'file', 333 'filename': hd_path[0], 334 'node-name': 'hd0-file' } } 335 336 # First we create a 2MB raw file, and fill each half with a 337 # different value 338 qemu_img('create', '-f', 'raw', hd_path[0], '2M') 339 qemu_io('-f', 'raw', '-c', 'write -P 0xa0 0 1M', hd_path[0]) 340 qemu_io('-f', 'raw', '-c', 'write -P 0xa1 1M 1M', hd_path[0]) 341 342 # Open the raw file with QEMU 343 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 344 self.assert_qmp(result, 'return', {}) 345 346 # Read 1MB from offset 0 347 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 348 349 # Reopen the image with a 1MB offset. 350 # Now the results are different 351 self.reopen(opts, {'offset': 1024*1024}) 352 self.run_qemu_io("hd0", "read -P 0xa1 0 1M") 353 354 # Reopen again with the original options. 355 # We get the original results again 356 self.reopen(opts) 357 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 358 359 # Remove the block device 360 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 361 self.assert_qmp(result, 'return', {}) 362 363 # Omitting an option should reset it to the default value, but if 364 # an option cannot be changed it shouldn't be possible to reset it 365 # to its default value either 366 def test_reset_default_values(self): 367 opts = {'driver': 'qcow2', 'node-name': 'hd0', 368 'file': { 'driver': 'file', 369 'filename': hd_path[0], 370 'x-check-cache-dropped': True, # This one can be changed 371 'locking': 'off', # This one can NOT be changed 372 'node-name': 'hd0-file' } } 373 374 # Open the file with QEMU 375 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 376 self.assert_qmp(result, 'return', {}) 377 378 # file.x-check-cache-dropped can be changed... 379 self.reopen(opts, { 'file.x-check-cache-dropped': False }) 380 # ...and dropped completely (resetting to the default value) 381 del opts['file']['x-check-cache-dropped'] 382 self.reopen(opts) 383 384 # file.locking cannot be changed nor reset to the default value 385 self.reopen(opts, { 'file.locking': 'on' }, "Cannot change the option 'locking'") 386 del opts['file']['locking'] 387 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 388 # But we can reopen it if we maintain its previous value 389 self.reopen(opts, { 'file.locking': 'off' }) 390 391 # Remove the block device 392 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 393 self.assert_qmp(result, 'return', {}) 394 395 # This test modifies the node graph a few times by changing the 396 # 'backing' option on reopen and verifies that the guest data that 397 # is read afterwards is consistent with the graph changes. 398 def test_io_with_graph_changes(self): 399 opts = [] 400 401 # Open hd0, hd1 and hd2 without any backing image 402 for i in range(3): 403 opts.append(hd_opts(i)) 404 opts[i]['backing'] = None 405 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) 406 self.assert_qmp(result, 'return', {}) 407 408 # hd0 409 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 410 self.run_qemu_io("hd0", "read -P 0 1M 1M") 411 self.run_qemu_io("hd0", "read -P 0 2M 1M") 412 413 # hd1 <- hd0 414 self.reopen(opts[0], {'backing': 'hd1'}) 415 416 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 417 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 418 self.run_qemu_io("hd0", "read -P 0 2M 1M") 419 420 # hd1 <- hd0 , hd1 <- hd2 421 self.reopen(opts[2], {'backing': 'hd1'}) 422 423 self.run_qemu_io("hd2", "read -P 0 0 1M") 424 self.run_qemu_io("hd2", "read -P 0xa1 1M 1M") 425 self.run_qemu_io("hd2", "read -P 0xa2 2M 1M") 426 427 # hd1 <- hd2 <- hd0 428 self.reopen(opts[0], {'backing': 'hd2'}) 429 430 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 431 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 432 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 433 434 # hd2 <- hd0 435 self.reopen(opts[2], {'backing': None}) 436 437 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 438 self.run_qemu_io("hd0", "read -P 0 1M 1M") 439 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 440 441 # hd2 <- hd1 <- hd0 442 self.reopen(opts[1], {'backing': 'hd2'}) 443 self.reopen(opts[0], {'backing': 'hd1'}) 444 445 self.run_qemu_io("hd0", "read -P 0xa0 0 1M") 446 self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") 447 self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") 448 449 # Illegal operation: hd2 is a child of hd1 450 self.reopen(opts[2], {'backing': 'hd1'}, 451 "Making 'hd1' a backing child of 'hd2' would create a cycle") 452 453 # hd2 <- hd0, hd2 <- hd1 454 self.reopen(opts[0], {'backing': 'hd2'}) 455 456 self.run_qemu_io("hd1", "read -P 0 0 1M") 457 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 458 self.run_qemu_io("hd1", "read -P 0xa2 2M 1M") 459 460 # More illegal operations 461 self.reopen(opts[2], {'backing': 'hd1'}, 462 "Making 'hd1' a backing child of 'hd2' would create a cycle") 463 self.reopen(opts[2], {'file': 'hd0-file'}, 464 "Permission conflict on node 'hd0-file': permissions 'write, resize' are both required by node 'hd0' (uses node 'hd0-file' as 'file' child) and unshared by node 'hd2' (uses node 'hd0-file' as 'file' child).") 465 466 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 467 self.assert_qmp(result, 'error/class', 'GenericError') 468 self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") 469 470 # hd1 doesn't have a backing file now 471 self.reopen(opts[1], {'backing': None}) 472 473 self.run_qemu_io("hd1", "read -P 0 0 1M") 474 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 475 self.run_qemu_io("hd1", "read -P 0 2M 1M") 476 477 # We can't remove the 'backing' option if the image has a 478 # default backing file 479 del opts[1]['backing'] 480 self.reopen(opts[1], {}, "backing is missing for 'hd1'") 481 482 self.run_qemu_io("hd1", "read -P 0 0 1M") 483 self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") 484 self.run_qemu_io("hd1", "read -P 0 2M 1M") 485 486 # This test verifies that we can't change the children of a block 487 # device during a reopen operation in a way that would create 488 # cycles in the node graph 489 @iotests.skip_if_unsupported(['blkverify']) 490 def test_graph_cycles(self): 491 opts = [] 492 493 # Open all three images without backing file 494 for i in range(3): 495 opts.append(hd_opts(i)) 496 opts[i]['backing'] = None 497 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) 498 self.assert_qmp(result, 'return', {}) 499 500 # hd1 <- hd0, hd1 <- hd2 501 self.reopen(opts[0], {'backing': 'hd1'}) 502 self.reopen(opts[2], {'backing': 'hd1'}) 503 504 # Illegal: hd2 is backed by hd1 505 self.reopen(opts[1], {'backing': 'hd2'}, 506 "Making 'hd2' a backing child of 'hd1' would create a cycle") 507 508 # hd1 <- hd0 <- hd2 509 self.reopen(opts[2], {'backing': 'hd0'}) 510 511 # Illegal: hd2 is backed by hd0, which is backed by hd1 512 self.reopen(opts[1], {'backing': 'hd2'}, 513 "Making 'hd2' a backing child of 'hd1' would create a cycle") 514 515 # Illegal: hd1 cannot point to itself 516 self.reopen(opts[1], {'backing': 'hd1'}, 517 "Making 'hd1' a backing child of 'hd1' would create a cycle") 518 519 # Remove all backing files 520 self.reopen(opts[0]) 521 self.reopen(opts[2]) 522 523 ########################################## 524 # Add a blkverify node using hd0 and hd1 # 525 ########################################## 526 bvopts = {'driver': 'blkverify', 527 'node-name': 'bv', 528 'test': 'hd0', 529 'raw': 'hd1'} 530 result = self.vm.qmp('blockdev-add', conv_keys = False, **bvopts) 531 self.assert_qmp(result, 'return', {}) 532 533 # blkverify doesn't currently allow reopening. TODO: implement this 534 self.reopen(bvopts, {}, "Block format 'blkverify' used by node 'bv'" + 535 " does not support reopening files") 536 537 # Illegal: hd0 is a child of the blkverify node 538 self.reopen(opts[0], {'backing': 'bv'}, 539 "Making 'bv' a backing child of 'hd0' would create a cycle") 540 541 # Delete the blkverify node 542 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bv') 543 self.assert_qmp(result, 'return', {}) 544 545 # Replace the protocol layer ('file' parameter) of a disk image 546 def test_replace_file(self): 547 # Create two small raw images and add them to a running VM 548 qemu_img('create', '-f', 'raw', hd_path[0], '10k') 549 qemu_img('create', '-f', 'raw', hd_path[1], '10k') 550 551 hd0_opts = {'driver': 'file', 'node-name': 'hd0-file', 'filename': hd_path[0] } 552 hd1_opts = {'driver': 'file', 'node-name': 'hd1-file', 'filename': hd_path[1] } 553 554 result = self.vm.qmp('blockdev-add', conv_keys = False, **hd0_opts) 555 self.assert_qmp(result, 'return', {}) 556 result = self.vm.qmp('blockdev-add', conv_keys = False, **hd1_opts) 557 self.assert_qmp(result, 'return', {}) 558 559 # Add a raw format layer that uses hd0-file as its protocol layer 560 opts = {'driver': 'raw', 'node-name': 'hd', 'file': 'hd0-file'} 561 562 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 563 self.assert_qmp(result, 'return', {}) 564 565 # Fill the image with data 566 self.run_qemu_io("hd", "read -P 0 0 10k") 567 self.run_qemu_io("hd", "write -P 0xa0 0 10k") 568 569 # Replace hd0-file with hd1-file and fill it with (different) data 570 self.reopen(opts, {'file': 'hd1-file'}) 571 self.run_qemu_io("hd", "read -P 0 0 10k") 572 self.run_qemu_io("hd", "write -P 0xa1 0 10k") 573 574 # Use hd0-file again and check that it contains the expected data 575 self.reopen(opts, {'file': 'hd0-file'}) 576 self.run_qemu_io("hd", "read -P 0xa0 0 10k") 577 578 # And finally do the same with hd1-file 579 self.reopen(opts, {'file': 'hd1-file'}) 580 self.run_qemu_io("hd", "read -P 0xa1 0 10k") 581 582 # Insert (and remove) a throttle filter 583 def test_insert_throttle_filter(self): 584 # Add an image to the VM 585 hd0_opts = hd_opts(0) 586 result = self.vm.qmp('blockdev-add', conv_keys = False, **hd0_opts) 587 self.assert_qmp(result, 'return', {}) 588 589 # Create a throttle-group object 590 opts = { 'qom-type': 'throttle-group', 'id': 'group0', 591 'limits': { 'iops-total': 1000 } } 592 result = self.vm.qmp('object-add', conv_keys = False, **opts) 593 self.assert_qmp(result, 'return', {}) 594 595 # Add a throttle filter with the group that we just created. 596 # The filter is not used by anyone yet 597 opts = { 'driver': 'throttle', 'node-name': 'throttle0', 598 'throttle-group': 'group0', 'file': 'hd0-file' } 599 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 600 self.assert_qmp(result, 'return', {}) 601 602 # Insert the throttle filter between hd0 and hd0-file 603 self.reopen(hd0_opts, {'file': 'throttle0'}) 604 605 # Remove the throttle filter from hd0 606 self.reopen(hd0_opts, {'file': 'hd0-file'}) 607 608 # Insert (and remove) a compress filter 609 def test_insert_compress_filter(self): 610 # Add an image to the VM: hd (raw) -> hd0 (qcow2) -> hd0-file (file) 611 opts = {'driver': 'raw', 'node-name': 'hd', 'file': hd_opts(0)} 612 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 613 self.assert_qmp(result, 'return', {}) 614 615 # Add a 'compress' filter 616 filter_opts = {'driver': 'compress', 617 'node-name': 'compress0', 618 'file': 'hd0'} 619 result = self.vm.qmp('blockdev-add', conv_keys = False, **filter_opts) 620 self.assert_qmp(result, 'return', {}) 621 622 # Unmap the beginning of the image (we cannot write compressed 623 # data to an allocated cluster) 624 self.run_qemu_io("hd", "write -z -u 0 128k") 625 626 # Write data to the first cluster 627 self.run_qemu_io("hd", "write -P 0xa0 0 64k") 628 629 # Insert the filter then write to the second cluster 630 # hd -> compress0 -> hd0 -> hd0-file 631 self.reopen(opts, {'file': 'compress0'}) 632 self.run_qemu_io("hd", "write -P 0xa1 64k 64k") 633 634 # Remove the filter then write to the third cluster 635 # hd -> hd0 -> hd0-file 636 self.reopen(opts, {'file': 'hd0'}) 637 self.run_qemu_io("hd", "write -P 0xa2 128k 64k") 638 639 # Verify the data that we just wrote 640 self.run_qemu_io("hd", "read -P 0xa0 0 64k") 641 self.run_qemu_io("hd", "read -P 0xa1 64k 64k") 642 self.run_qemu_io("hd", "read -P 0xa2 128k 64k") 643 644 self.vm.shutdown() 645 646 # Check the first byte of the first three L2 entries and verify that 647 # the second one is compressed (0x40) while the others are not (0x80) 648 iotests.qemu_io_log('-f', 'raw', '-c', 'read -P 0x80 0x40000 1', 649 '-c', 'read -P 0x40 0x40008 1', 650 '-c', 'read -P 0x80 0x40010 1', hd_path[0]) 651 652 # Misc reopen tests with different block drivers 653 @iotests.skip_if_unsupported(['quorum', 'throttle']) 654 def test_misc_drivers(self): 655 #################### 656 ###### quorum ###### 657 #################### 658 for i in range(3): 659 opts = hd_opts(i) 660 # Open all three images without backing file 661 opts['backing'] = None 662 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 663 self.assert_qmp(result, 'return', {}) 664 665 opts = {'driver': 'quorum', 666 'node-name': 'quorum0', 667 'children': ['hd0', 'hd1', 'hd2'], 668 'vote-threshold': 2} 669 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 670 self.assert_qmp(result, 'return', {}) 671 672 # Quorum doesn't currently allow reopening. TODO: implement this 673 self.reopen(opts, {}, "Block format 'quorum' used by node 'quorum0'" + 674 " does not support reopening files") 675 676 # You can't make quorum0 a backing file of hd0: 677 # hd0 is already a child of quorum0. 678 self.reopen(hd_opts(0), {'backing': 'quorum0'}, 679 "Making 'quorum0' a backing child of 'hd0' would create a cycle") 680 681 # Delete quorum0 682 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'quorum0') 683 self.assert_qmp(result, 'return', {}) 684 685 # Delete hd0, hd1 and hd2 686 for i in range(3): 687 result = self.vm.qmp('blockdev-del', conv_keys = True, 688 node_name = 'hd%d' % i) 689 self.assert_qmp(result, 'return', {}) 690 691 ###################### 692 ###### blkdebug ###### 693 ###################### 694 opts = {'driver': 'blkdebug', 695 'node-name': 'bd', 696 'config': '/dev/null', 697 'image': hd_opts(0)} 698 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 699 self.assert_qmp(result, 'return', {}) 700 701 # blkdebug allows reopening if we keep the same options 702 self.reopen(opts) 703 704 # but it currently does not allow changes 705 self.reopen(opts, {'image': 'hd1'}, "Cannot change the option 'image'") 706 self.reopen(opts, {'align': 33554432}, "Cannot change the option 'align'") 707 self.reopen(opts, {'config': '/non/existent'}, "Cannot change the option 'config'") 708 del opts['config'] 709 self.reopen(opts, {}, "Option 'config' cannot be reset to its default value") 710 711 # Delete the blkdebug node 712 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bd') 713 self.assert_qmp(result, 'return', {}) 714 715 ################## 716 ###### null ###### 717 ################## 718 opts = {'driver': 'null-co', 'node-name': 'root', 'size': 1024} 719 720 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 721 self.assert_qmp(result, 'return', {}) 722 723 # 1 << 30 is the default value, but we cannot change it explicitly 724 self.reopen(opts, {'size': (1 << 30)}, "Cannot change the option 'size'") 725 726 # We cannot change 'size' back to its default value either 727 del opts['size'] 728 self.reopen(opts, {}, "Option 'size' cannot be reset to its default value") 729 730 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'root') 731 self.assert_qmp(result, 'return', {}) 732 733 ################## 734 ###### file ###### 735 ################## 736 opts = hd_opts(0) 737 opts['file']['locking'] = 'on' 738 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 739 self.assert_qmp(result, 'return', {}) 740 741 # 'locking' cannot be changed 742 del opts['file']['locking'] 743 self.reopen(opts, {'file.locking': 'on'}) 744 self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") 745 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 746 747 # Trying to reopen the 'file' node directly does not make a difference 748 opts = opts['file'] 749 self.reopen(opts, {'locking': 'on'}) 750 self.reopen(opts, {'locking': 'off'}, "Cannot change the option 'locking'") 751 self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") 752 753 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 754 self.assert_qmp(result, 'return', {}) 755 756 ###################### 757 ###### throttle ###### 758 ###################### 759 opts = { 'qom-type': 'throttle-group', 'id': 'group0', 760 'limits': { 'iops-total': 1000 } } 761 result = self.vm.qmp('object-add', conv_keys = False, **opts) 762 self.assert_qmp(result, 'return', {}) 763 764 opts = { 'qom-type': 'throttle-group', 'id': 'group1', 765 'limits': { 'iops-total': 2000 } } 766 result = self.vm.qmp('object-add', conv_keys = False, **opts) 767 self.assert_qmp(result, 'return', {}) 768 769 # Add a throttle filter with group = group0 770 opts = { 'driver': 'throttle', 'node-name': 'throttle0', 771 'throttle-group': 'group0', 'file': hd_opts(0) } 772 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 773 self.assert_qmp(result, 'return', {}) 774 775 # We can reopen it if we keep the same options 776 self.reopen(opts) 777 778 # We can also reopen if 'file' is a reference to the child 779 self.reopen(opts, {'file': 'hd0'}) 780 781 # This is illegal 782 self.reopen(opts, {'throttle-group': 'notfound'}, "Throttle group 'notfound' does not exist") 783 784 # But it's possible to change the group to group1 785 self.reopen(opts, {'throttle-group': 'group1'}) 786 787 # Now group1 is in use, it cannot be deleted 788 result = self.vm.qmp('object-del', id = 'group1') 789 self.assert_qmp(result, 'error/class', 'GenericError') 790 self.assert_qmp(result, 'error/desc', "object 'group1' is in use, can not be deleted") 791 792 # Default options, this switches the group back to group0 793 self.reopen(opts) 794 795 # So now we cannot delete group0 796 result = self.vm.qmp('object-del', id = 'group0') 797 self.assert_qmp(result, 'error/class', 'GenericError') 798 self.assert_qmp(result, 'error/desc', "object 'group0' is in use, can not be deleted") 799 800 # But group1 is free this time, and it can be deleted 801 result = self.vm.qmp('object-del', id = 'group1') 802 self.assert_qmp(result, 'return', {}) 803 804 # Let's delete the filter node 805 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'throttle0') 806 self.assert_qmp(result, 'return', {}) 807 808 # And we can finally get rid of group0 809 result = self.vm.qmp('object-del', id = 'group0') 810 self.assert_qmp(result, 'return', {}) 811 812 # If an image has a backing file then the 'backing' option must be 813 # passed on reopen. We don't allow leaving the option out in this 814 # case because it's unclear what the correct semantics would be. 815 def test_missing_backing_options_1(self): 816 # hd2 817 opts = hd_opts(2) 818 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 819 self.assert_qmp(result, 'return', {}) 820 821 # hd0 822 opts = hd_opts(0) 823 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 824 self.assert_qmp(result, 'return', {}) 825 826 # hd0 has no backing file: we can omit the 'backing' option 827 self.reopen(opts) 828 829 # hd2 <- hd0 830 self.reopen(opts, {'backing': 'hd2'}) 831 832 # hd0 has a backing file: we must set the 'backing' option 833 self.reopen(opts, {}, "backing is missing for 'hd0'") 834 835 # hd2 can't be removed because it's the backing file of hd0 836 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 837 self.assert_qmp(result, 'error/class', 'GenericError') 838 self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") 839 840 # Detach hd2 from hd0. 841 self.reopen(opts, {'backing': None}) 842 843 # Without a backing file, we can omit 'backing' again 844 self.reopen(opts) 845 846 # Remove both hd0 and hd2 847 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 848 self.assert_qmp(result, 'return', {}) 849 850 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') 851 self.assert_qmp(result, 'return', {}) 852 853 # If an image has default backing file (as part of its metadata) 854 # then the 'backing' option must be passed on reopen. We don't 855 # allow leaving the option out in this case because it's unclear 856 # what the correct semantics would be. 857 def test_missing_backing_options_2(self): 858 # hd0 <- hd1 859 # (hd0 is hd1's default backing file) 860 opts = hd_opts(1) 861 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 862 self.assert_qmp(result, 'return', {}) 863 864 # hd1 has a backing file: we can't omit the 'backing' option 865 self.reopen(opts, {}, "backing is missing for 'hd1'") 866 867 # Let's detach the backing file 868 self.reopen(opts, {'backing': None}) 869 870 # No backing file attached to hd1 now, but we still can't omit the 'backing' option 871 self.reopen(opts, {}, "backing is missing for 'hd1'") 872 873 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') 874 self.assert_qmp(result, 'return', {}) 875 876 # Test that making 'backing' a reference to an existing child 877 # keeps its current options 878 def test_backing_reference(self): 879 # hd2 <- hd1 <- hd0 880 opts = hd_opts(0) 881 opts['backing'] = hd_opts(1) 882 opts['backing']['backing'] = hd_opts(2) 883 # Enable 'detect-zeroes' on all three nodes 884 opts['detect-zeroes'] = 'on' 885 opts['backing']['detect-zeroes'] = 'on' 886 opts['backing']['backing']['detect-zeroes'] = 'on' 887 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 888 self.assert_qmp(result, 'return', {}) 889 890 # Reopen the chain passing the minimum amount of required options. 891 # By making 'backing' a reference to hd1 (instead of a sub-dict) 892 # we tell QEMU to keep its current set of options. 893 opts = {'driver': iotests.imgfmt, 894 'node-name': 'hd0', 895 'file': 'hd0-file', 896 'backing': 'hd1' } 897 self.reopen(opts) 898 899 # This has reset 'detect-zeroes' on hd0, but not on hd1 and hd2. 900 self.assert_qmp(self.get_node('hd0'), 'detect_zeroes', 'off') 901 self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') 902 self.assert_qmp(self.get_node('hd2'), 'detect_zeroes', 'on') 903 904 # Test what happens if the graph changes due to other operations 905 # such as block-stream 906 def test_block_stream_1(self): 907 # hd1 <- hd0 908 opts = hd_opts(0) 909 opts['backing'] = hd_opts(1) 910 opts['backing']['backing'] = None 911 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 912 self.assert_qmp(result, 'return', {}) 913 914 # Stream hd1 into hd0 and wait until it's done 915 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', device = 'hd0') 916 self.assert_qmp(result, 'return', {}) 917 self.wait_until_completed(drive = 'stream0') 918 919 # Now we have only hd0 920 self.assertEqual(self.get_node('hd1'), None) 921 922 # We have backing.* options but there's no backing file anymore 923 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 924 925 # If we remove the 'backing' option then we can reopen hd0 just fine 926 del opts['backing'] 927 self.reopen(opts) 928 929 # We can also reopen hd0 if we set 'backing' to null 930 self.reopen(opts, {'backing': None}) 931 932 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 933 self.assert_qmp(result, 'return', {}) 934 935 # Another block_stream test 936 def test_block_stream_2(self): 937 # hd2 <- hd1 <- hd0 938 opts = hd_opts(0) 939 opts['backing'] = hd_opts(1) 940 opts['backing']['backing'] = hd_opts(2) 941 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 942 self.assert_qmp(result, 'return', {}) 943 944 # Stream hd1 into hd0 and wait until it's done 945 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 946 device = 'hd0', base_node = 'hd2') 947 self.assert_qmp(result, 'return', {}) 948 self.wait_until_completed(drive = 'stream0') 949 950 # The chain is hd2 <- hd0 now. hd1 is missing 951 self.assertEqual(self.get_node('hd1'), None) 952 953 # The backing options in the dict were meant for hd1, but we cannot 954 # use them with hd2 because hd1 had a backing file while hd2 does not. 955 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 956 957 # If we remove hd1's options from the dict then things work fine 958 opts['backing'] = opts['backing']['backing'] 959 self.reopen(opts) 960 961 # We can also reopen hd0 if we use a reference to the backing file 962 self.reopen(opts, {'backing': 'hd2'}) 963 964 # But we cannot leave the option out 965 del opts['backing'] 966 self.reopen(opts, {}, "backing is missing for 'hd0'") 967 968 # Now we can delete hd0 (and hd2) 969 result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') 970 self.assert_qmp(result, 'return', {}) 971 self.assertEqual(self.get_node('hd2'), None) 972 973 # Reopen the chain during a block-stream job (from hd1 to hd0) 974 def test_block_stream_3(self): 975 # hd2 <- hd1 <- hd0 976 opts = hd_opts(0) 977 opts['backing'] = hd_opts(1) 978 opts['backing']['backing'] = hd_opts(2) 979 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 980 self.assert_qmp(result, 'return', {}) 981 982 # hd2 <- hd0 983 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 984 device = 'hd0', base_node = 'hd2', 985 auto_finalize = False) 986 self.assert_qmp(result, 'return', {}) 987 988 # We can remove hd2 while the stream job is ongoing 989 opts['backing']['backing'] = None 990 self.reopen(opts, {}) 991 992 # We can't remove hd1 while the stream job is ongoing 993 opts['backing'] = None 994 self.reopen(opts, {}, "Cannot change frozen 'backing' link from 'hd0' to 'hd1'") 995 996 self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) 997 998 # Reopen the chain during a block-stream job (from hd2 to hd1) 999 def test_block_stream_4(self): 1000 # hd2 <- hd1 <- hd0 1001 opts = hd_opts(0) 1002 opts['backing'] = hd_opts(1) 1003 opts['backing']['backing'] = hd_opts(2) 1004 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 1005 self.assert_qmp(result, 'return', {}) 1006 1007 # hd1 <- hd0 1008 result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', 1009 device = 'hd1', filter_node_name='cor', 1010 auto_finalize = False) 1011 self.assert_qmp(result, 'return', {}) 1012 1013 # We can't reopen with the original options because there is a filter 1014 # inserted by stream job above hd1. 1015 self.reopen(opts, {}, 1016 "Cannot change the option 'backing.backing.file.node-name'") 1017 1018 # We can't reopen hd1 to read-only, as block-stream requires it to be 1019 # read-write 1020 self.reopen(opts['backing'], {'read-only': True}, 1021 "Read-only block node 'hd1' cannot support read-write users") 1022 1023 # We can't remove hd2 while the stream job is ongoing 1024 opts['backing']['backing'] = None 1025 self.reopen(opts['backing'], {'read-only': False}, 1026 "Cannot change frozen 'backing' link from 'hd1' to 'hd2'") 1027 1028 # We can detach hd1 from hd0 because it doesn't affect the stream job 1029 opts['backing'] = None 1030 self.reopen(opts) 1031 1032 self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) 1033 1034 # Reopen the chain during a block-commit job (from hd0 to hd2) 1035 def test_block_commit_1(self): 1036 # hd2 <- hd1 <- hd0 1037 opts = hd_opts(0) 1038 opts['backing'] = hd_opts(1) 1039 opts['backing']['backing'] = hd_opts(2) 1040 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 1041 self.assert_qmp(result, 'return', {}) 1042 1043 result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', 1044 device = 'hd0') 1045 self.assert_qmp(result, 'return', {}) 1046 1047 # We can't remove hd2 while the commit job is ongoing 1048 opts['backing']['backing'] = None 1049 self.reopen(opts, {}, "Cannot change frozen 'backing' link from 'hd1' to 'hd2'") 1050 1051 # We can't remove hd1 while the commit job is ongoing 1052 opts['backing'] = None 1053 self.reopen(opts, {}, "Cannot change frozen 'backing' link from 'hd0' to 'hd1'") 1054 1055 event = self.vm.event_wait(name='BLOCK_JOB_READY') 1056 self.assert_qmp(event, 'data/device', 'commit0') 1057 self.assert_qmp(event, 'data/type', 'commit') 1058 self.assert_qmp_absent(event, 'data/error') 1059 1060 result = self.vm.qmp('block-job-complete', device='commit0') 1061 self.assert_qmp(result, 'return', {}) 1062 1063 self.wait_until_completed(drive = 'commit0') 1064 1065 # Reopen the chain during a block-commit job (from hd1 to hd2) 1066 def test_block_commit_2(self): 1067 # hd2 <- hd1 <- hd0 1068 opts = hd_opts(0) 1069 opts['backing'] = hd_opts(1) 1070 opts['backing']['backing'] = hd_opts(2) 1071 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 1072 self.assert_qmp(result, 'return', {}) 1073 1074 result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', 1075 device = 'hd0', top_node = 'hd1', 1076 auto_finalize = False) 1077 self.assert_qmp(result, 'return', {}) 1078 1079 # We can't remove hd2 while the commit job is ongoing 1080 opts['backing']['backing'] = None 1081 self.reopen(opts, {}, "Cannot change the option 'backing.driver'") 1082 1083 # We can't remove hd1 while the commit job is ongoing 1084 opts['backing'] = None 1085 self.reopen(opts, {}, "Cannot replace implicit backing child of hd0") 1086 1087 # hd2 <- hd0 1088 self.vm.run_job('commit0', auto_finalize = False, auto_dismiss = True) 1089 1090 self.assert_qmp(self.get_node('hd0'), 'ro', False) 1091 self.assertEqual(self.get_node('hd1'), None) 1092 self.assert_qmp(self.get_node('hd2'), 'ro', True) 1093 1094 def run_test_iothreads(self, iothread_a, iothread_b, errmsg = None): 1095 opts = hd_opts(0) 1096 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) 1097 self.assert_qmp(result, 'return', {}) 1098 1099 opts2 = hd_opts(2) 1100 result = self.vm.qmp('blockdev-add', conv_keys = False, **opts2) 1101 self.assert_qmp(result, 'return', {}) 1102 1103 result = self.vm.qmp('object-add', qom_type='iothread', id='iothread0') 1104 self.assert_qmp(result, 'return', {}) 1105 1106 result = self.vm.qmp('object-add', qom_type='iothread', id='iothread1') 1107 self.assert_qmp(result, 'return', {}) 1108 1109 result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi0', 1110 iothread=iothread_a) 1111 self.assert_qmp(result, 'return', {}) 1112 1113 result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi1', 1114 iothread=iothread_b) 1115 self.assert_qmp(result, 'return', {}) 1116 1117 if iothread_a: 1118 result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd0', 1119 share_rw=True, bus="scsi0.0") 1120 self.assert_qmp(result, 'return', {}) 1121 1122 if iothread_b: 1123 result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd2', 1124 share_rw=True, bus="scsi1.0") 1125 self.assert_qmp(result, 'return', {}) 1126 1127 # Attaching the backing file may or may not work 1128 self.reopen(opts, {'backing': 'hd2'}, errmsg) 1129 1130 # But removing the backing file should always work 1131 self.reopen(opts, {'backing': None}) 1132 1133 self.vm.shutdown() 1134 1135 # We don't allow setting a backing file that uses a different AioContext if 1136 # neither of them can switch to the other AioContext 1137 def test_iothreads_error(self): 1138 self.run_test_iothreads('iothread0', 'iothread1', 1139 "Cannot change iothread of active block backend") 1140 1141 def test_iothreads_compatible_users(self): 1142 self.run_test_iothreads('iothread0', 'iothread0') 1143 1144 def test_iothreads_switch_backing(self): 1145 self.run_test_iothreads('iothread0', None) 1146 1147 def test_iothreads_switch_overlay(self): 1148 self.run_test_iothreads(None, 'iothread0') 1149 1150if __name__ == '__main__': 1151 iotests.activate_logging() 1152 iotests.main(supported_fmts=["qcow2"], 1153 supported_protocols=["file"]) 1154