projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 903cb1bf | 1 | #!/usr/bin/env python3 |
| bf3e50f6 AG |
2 | # |
| 3 | # Test cases for the QMP 'x-blockdev-reopen' command | |
| 4 | # | |
| 5 | # Copyright (C) 2018-2019 Igalia, S.L. | |
| 6 | # Author: Alberto Garcia <berto@igalia.com> | |
| 7 | # | |
| 8 | # This program is free software; you can redistribute it and/or modify | |
| 9 | # it under the terms of the GNU General Public License as published by | |
| 10 | # the Free Software Foundation; either version 2 of the License, or | |
| 11 | # (at your option) any later version. | |
| 12 | # | |
| 13 | # This program is distributed in the hope that it will be useful, | |
| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | # GNU General Public License for more details. | |
| 17 | # | |
| 18 | # You should have received a copy of the GNU General Public License | |
| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 | # | |
| 21 | ||
| 22 | import os | |
| 23 | import re | |
| 24 | import iotests | |
| 25 | import copy | |
| 26 | import json | |
| 27 | from iotests import qemu_img, qemu_io | |
| 28 | ||
| 29 | hd_path = [ | |
| 30 | os.path.join(iotests.test_dir, 'hd0.img'), | |
| 31 | os.path.join(iotests.test_dir, 'hd1.img'), | |
| 32 | os.path.join(iotests.test_dir, 'hd2.img') | |
| 33 | ] | |
| 34 | ||
| 35 | def hd_opts(idx): | |
| 36 | return {'driver': iotests.imgfmt, | |
| 37 | 'node-name': 'hd%d' % idx, | |
| 38 | 'file': {'driver': 'file', | |
| 39 | 'node-name': 'hd%d-file' % idx, | |
| 40 | 'filename': hd_path[idx] } } | |
| 41 | ||
| 42 | class TestBlockdevReopen(iotests.QMPTestCase): | |
| 43 | total_io_cmds = 0 | |
| 44 | ||
| 45 | def setUp(self): | |
| 46 | qemu_img('create', '-f', iotests.imgfmt, hd_path[0], '3M') | |
| 47 | qemu_img('create', '-f', iotests.imgfmt, '-b', hd_path[0], hd_path[1]) | |
| 48 | qemu_img('create', '-f', iotests.imgfmt, hd_path[2], '3M') | |
| 49 | qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa0 0 1M', hd_path[0]) | |
| 50 | qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa1 1M 1M', hd_path[1]) | |
| 51 | qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa2 2M 1M', hd_path[2]) | |
| 52 | self.vm = iotests.VM() | |
| 53 | self.vm.launch() | |
| 54 | ||
| 55 | def tearDown(self): | |
| 56 | self.vm.shutdown() | |
| 57 | self.check_qemu_io_errors() | |
| 58 | os.remove(hd_path[0]) | |
| 59 | os.remove(hd_path[1]) | |
| 60 | os.remove(hd_path[2]) | |
| 61 | ||
| 62 | # The output of qemu-io is not returned by vm.hmp_qemu_io() but | |
| 63 | # it's stored in the log and can only be read when the VM has been | |
| 64 | # shut down. This function runs qemu-io and keeps track of the | |
| 65 | # number of times it's been called. | |
| 66 | def run_qemu_io(self, img, cmd): | |
| 67 | result = self.vm.hmp_qemu_io(img, cmd) | |
| 68 | self.assert_qmp(result, 'return', '') | |
| 69 | self.total_io_cmds += 1 | |
| 70 | ||
| 71 | # Once the VM is shut down we can parse the log and see if qemu-io | |
| 72 | # ran without errors. | |
| 73 | def check_qemu_io_errors(self): | |
| 74 | self.assertFalse(self.vm.is_running()) | |
| 75 | found = 0 | |
| 76 | log = self.vm.get_log() | |
| 77 | for line in log.split("\n"): | |
| 78 | if line.startswith("Pattern verification failed"): | |
| 79 | raise Exception("%s (command #%d)" % (line, found)) | |
| 80 | if re.match("read .*/.* bytes at offset", line): | |
| 81 | found += 1 | |
| 82 | self.assertEqual(found, self.total_io_cmds, | |
| 83 | "Expected output of %d qemu-io commands, found %d" % | |
| 84 | (found, self.total_io_cmds)) | |
| 85 | ||
| 86 | # Run x-blockdev-reopen with 'opts' but applying 'newopts' | |
| 87 | # on top of it. The original 'opts' dict is unmodified | |
| 88 | def reopen(self, opts, newopts = {}, errmsg = None): | |
| 89 | opts = copy.deepcopy(opts) | |
| 90 | ||
| 91 | # Apply the changes from 'newopts' on top of 'opts' | |
| 92 | for key in newopts: | |
| 93 | value = newopts[key] | |
| 94 | # If key has the form "foo.bar" then we need to do | |
| 95 | # opts["foo"]["bar"] = value, not opts["foo.bar"] = value | |
| 96 | subdict = opts | |
| 97 | while key.find('.') != -1: | |
| 98 | [prefix, key] = key.split('.', 1) | |
| 99 | subdict = opts[prefix] | |
| 100 | subdict[key] = value | |
| 101 | ||
| 102 | result = self.vm.qmp('x-blockdev-reopen', conv_keys = False, **opts) | |
| 103 | if errmsg: | |
| 104 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 105 | self.assert_qmp(result, 'error/desc', errmsg) | |
| 106 | else: | |
| 107 | self.assert_qmp(result, 'return', {}) | |
| 108 | ||
| 109 | ||
| 110 | # Run query-named-block-nodes and return the specified entry | |
| 111 | def get_node(self, node_name): | |
| 112 | result = self.vm.qmp('query-named-block-nodes') | |
| 113 | for node in result['return']: | |
| 114 | if node['node-name'] == node_name: | |
| 115 | return node | |
| 116 | return None | |
| 117 | ||
| 118 | # Run 'query-named-block-nodes' and compare its output with the | |
| 119 | # value passed by the user in 'graph' | |
| 120 | def check_node_graph(self, graph): | |
| 121 | result = self.vm.qmp('query-named-block-nodes') | |
| 122 | self.assertEqual(json.dumps(graph, sort_keys=True), | |
| 123 | json.dumps(result, sort_keys=True)) | |
| 124 | ||
| 125 | # This test opens one single disk image (without backing files) | |
| 126 | # and tries to reopen it with illegal / incorrect parameters. | |
| 127 | def test_incorrect_parameters_single_file(self): | |
| 128 | # Open 'hd0' only (no backing files) | |
| 129 | opts = hd_opts(0) | |
| 130 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 131 | self.assert_qmp(result, 'return', {}) | |
| 132 | original_graph = self.vm.qmp('query-named-block-nodes') | |
| 133 | ||
| 134 | # We can reopen the image passing the same options | |
| 135 | self.reopen(opts) | |
| 136 | ||
| 137 | # We can also reopen passing a child reference in 'file' | |
| 138 | self.reopen(opts, {'file': 'hd0-file'}) | |
| 139 | ||
| 140 | # We cannot change any of these | |
| 141 | self.reopen(opts, {'node-name': 'not-found'}, "Cannot find node named 'not-found'") | |
| 142 | self.reopen(opts, {'node-name': ''}, "Cannot find node named ''") | |
| 143 | self.reopen(opts, {'node-name': None}, "Invalid parameter type for 'node-name', expected: string") | |
| 144 | self.reopen(opts, {'driver': 'raw'}, "Cannot change the option 'driver'") | |
| 145 | self.reopen(opts, {'driver': ''}, "Invalid parameter ''") | |
| 146 | self.reopen(opts, {'driver': None}, "Invalid parameter type for 'driver', expected: string") | |
| 147 | self.reopen(opts, {'file': 'not-found'}, "Cannot change the option 'file'") | |
| 148 | self.reopen(opts, {'file': ''}, "Cannot change the option 'file'") | |
| 149 | self.reopen(opts, {'file': None}, "Invalid parameter type for 'file', expected: BlockdevRef") | |
| 150 | self.reopen(opts, {'file.node-name': 'newname'}, "Cannot change the option 'node-name'") | |
| 151 | self.reopen(opts, {'file.driver': 'host_device'}, "Cannot change the option 'driver'") | |
| 152 | self.reopen(opts, {'file.filename': hd_path[1]}, "Cannot change the option 'filename'") | |
| 153 | self.reopen(opts, {'file.aio': 'native'}, "Cannot change the option 'aio'") | |
| 154 | self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") | |
| 155 | self.reopen(opts, {'file.filename': None}, "Invalid parameter type for 'file.filename', expected: string") | |
| 156 | ||
| 157 | # node-name is optional in BlockdevOptions, but x-blockdev-reopen needs it | |
| 158 | del opts['node-name'] | |
| 159 | self.reopen(opts, {}, "Node name not specified") | |
| 160 | ||
| 161 | # Check that nothing has changed | |
| 162 | self.check_node_graph(original_graph) | |
| 163 | ||
| 164 | # Remove the node | |
| 165 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 166 | self.assert_qmp(result, 'return', {}) | |
| 167 | ||
| 168 | # This test opens an image with a backing file and tries to reopen | |
| 169 | # it with illegal / incorrect parameters. | |
| 170 | def test_incorrect_parameters_backing_file(self): | |
| 171 | # Open hd1 omitting the backing options (hd0 will be opened | |
| 172 | # with the default options) | |
| 173 | opts = hd_opts(1) | |
| 174 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 175 | self.assert_qmp(result, 'return', {}) | |
| 176 | original_graph = self.vm.qmp('query-named-block-nodes') | |
| 177 | ||
| 178 | # We can't reopen the image passing the same options, 'backing' is mandatory | |
| 179 | self.reopen(opts, {}, "backing is missing for 'hd1'") | |
| 180 | ||
| 181 | # Everything works if we pass 'backing' using the existing node name | |
| 182 | for node in original_graph['return']: | |
| 183 | if node['drv'] == iotests.imgfmt and node['file'] == hd_path[0]: | |
| 184 | backing_node_name = node['node-name'] | |
| 185 | self.reopen(opts, {'backing': backing_node_name}) | |
| 186 | ||
| 187 | # We can't use a non-existing or empty (non-NULL) node as the backing image | |
| 188 | self.reopen(opts, {'backing': 'not-found'}, "Cannot find device= nor node_name=not-found") | |
| 189 | self.reopen(opts, {'backing': ''}, "Cannot find device= nor node_name=") | |
| 190 | ||
| 191 | # We can reopen the image just fine if we specify the backing options | |
| 192 | opts['backing'] = {'driver': iotests.imgfmt, | |
| 193 | 'file': {'driver': 'file', | |
| 194 | 'filename': hd_path[0]}} | |
| 195 | self.reopen(opts) | |
| 196 | ||
| 197 | # We cannot change any of these options | |
| 198 | self.reopen(opts, {'backing.node-name': 'newname'}, "Cannot change the option 'node-name'") | |
| 199 | self.reopen(opts, {'backing.driver': 'raw'}, "Cannot change the option 'driver'") | |
| 200 | self.reopen(opts, {'backing.file.node-name': 'newname'}, "Cannot change the option 'node-name'") | |
| 201 | self.reopen(opts, {'backing.file.driver': 'host_device'}, "Cannot change the option 'driver'") | |
| 202 | ||
| 203 | # Check that nothing has changed since the beginning | |
| 204 | self.check_node_graph(original_graph) | |
| 205 | ||
| 206 | # Remove the node | |
| 207 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') | |
| 208 | self.assert_qmp(result, 'return', {}) | |
| 209 | ||
| 210 | # Reopen an image several times changing some of its options | |
| 211 | def test_reopen(self): | |
| 23e1d054 HR |
212 | # Check whether the filesystem supports O_DIRECT |
| 213 | if 'O_DIRECT' in qemu_io('-f', 'raw', '-t', 'none', '-c', 'quit', hd_path[0]): | |
| 214 | supports_direct = False | |
| 215 | else: | |
| 216 | supports_direct = True | |
| 217 | ||
| bf3e50f6 AG |
218 | # Open the hd1 image passing all backing options |
| 219 | opts = hd_opts(1) | |
| 220 | opts['backing'] = hd_opts(0) | |
| 221 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 222 | self.assert_qmp(result, 'return', {}) | |
| 223 | original_graph = self.vm.qmp('query-named-block-nodes') | |
| 224 | ||
| 225 | # We can reopen the image passing the same options | |
| 226 | self.reopen(opts) | |
| 227 | ||
| 228 | # Reopen in read-only mode | |
| 229 | self.assert_qmp(self.get_node('hd1'), 'ro', False) | |
| 230 | ||
| 231 | self.reopen(opts, {'read-only': True}) | |
| 232 | self.assert_qmp(self.get_node('hd1'), 'ro', True) | |
| 233 | self.reopen(opts) | |
| 234 | self.assert_qmp(self.get_node('hd1'), 'ro', False) | |
| 235 | ||
| 236 | # Change the cache options | |
| 237 | self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) | |
| 238 | self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) | |
| 239 | self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) | |
| 23e1d054 | 240 | self.reopen(opts, {'cache': { 'direct': supports_direct, 'no-flush': True }}) |
| bf3e50f6 | 241 | self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) |
| 23e1d054 | 242 | self.assert_qmp(self.get_node('hd1'), 'cache/direct', supports_direct) |
| bf3e50f6 AG |
243 | self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', True) |
| 244 | ||
| 245 | # Reopen again with the original options | |
| 246 | self.reopen(opts) | |
| 247 | self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True) | |
| 248 | self.assert_qmp(self.get_node('hd1'), 'cache/direct', False) | |
| 249 | self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False) | |
| 250 | ||
| 251 | # Change 'detect-zeroes' and 'discard' | |
| 252 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') | |
| 253 | self.reopen(opts, {'detect-zeroes': 'on'}) | |
| 254 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') | |
| 255 | self.reopen(opts, {'detect-zeroes': 'unmap'}, | |
| 256 | "setting detect-zeroes to unmap is not allowed " + | |
| 257 | "without setting discard operation to unmap") | |
| 258 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') | |
| 259 | self.reopen(opts, {'detect-zeroes': 'unmap', 'discard': 'unmap'}) | |
| 260 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'unmap') | |
| 261 | self.reopen(opts) | |
| 262 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off') | |
| 263 | ||
| 264 | # Changing 'force-share' is currently not supported | |
| 265 | self.reopen(opts, {'force-share': True}, "Cannot change the option 'force-share'") | |
| 266 | ||
| 267 | # Change some qcow2-specific options | |
| 268 | # No way to test for success other than checking the return message | |
| 269 | if iotests.imgfmt == 'qcow2': | |
| 270 | self.reopen(opts, {'l2-cache-entry-size': 128 * 1024}, | |
| 271 | "L2 cache entry size must be a power of two "+ | |
| 272 | "between 512 and the cluster size (65536)") | |
| 273 | self.reopen(opts, {'l2-cache-size': 1024 * 1024, | |
| 274 | 'cache-size': 512 * 1024}, | |
| 275 | "l2-cache-size may not exceed cache-size") | |
| 276 | self.reopen(opts, {'l2-cache-size': 4 * 1024 * 1024, | |
| 277 | 'refcount-cache-size': 4 * 1024 * 1024, | |
| 278 | 'l2-cache-entry-size': 32 * 1024}) | |
| 279 | self.reopen(opts, {'pass-discard-request': True}) | |
| 280 | ||
| 281 | # Check that nothing has changed since the beginning | |
| 282 | # (from the parameters that we can check) | |
| 283 | self.check_node_graph(original_graph) | |
| 284 | ||
| 285 | # Check that the node names (other than the top-level one) are optional | |
| 286 | del opts['file']['node-name'] | |
| 287 | del opts['backing']['node-name'] | |
| 288 | del opts['backing']['file']['node-name'] | |
| 289 | self.reopen(opts) | |
| 290 | self.check_node_graph(original_graph) | |
| 291 | ||
| 292 | # Reopen setting backing = null, this removes the backing image from the chain | |
| 293 | self.reopen(opts, {'backing': None}) | |
| 294 | self.assert_qmp_absent(self.get_node('hd1'), 'image/backing-image') | |
| 295 | ||
| 296 | # Open the 'hd0' image | |
| 297 | result = self.vm.qmp('blockdev-add', conv_keys = False, **hd_opts(0)) | |
| 298 | self.assert_qmp(result, 'return', {}) | |
| 299 | ||
| 300 | # Reopen the hd1 image setting 'hd0' as its backing image | |
| 301 | self.reopen(opts, {'backing': 'hd0'}) | |
| 302 | self.assert_qmp(self.get_node('hd1'), 'image/backing-image/filename', hd_path[0]) | |
| 303 | ||
| 304 | # Check that nothing has changed since the beginning | |
| 305 | self.reopen(hd_opts(0), {'read-only': True}) | |
| 306 | self.check_node_graph(original_graph) | |
| 307 | ||
| 308 | # The backing file (hd0) is now a reference, we cannot change backing.* anymore | |
| 309 | self.reopen(opts, {}, "Cannot change the option 'backing.driver'") | |
| 310 | ||
| 311 | # We can't remove 'hd0' while it's a backing image of 'hd1' | |
| 312 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 313 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 314 | self.assert_qmp(result, 'error/desc', "Node 'hd0' is busy: node is used as backing hd of 'hd1'") | |
| 315 | ||
| 316 | # But we can remove both nodes if done in the proper order | |
| 317 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') | |
| 318 | self.assert_qmp(result, 'return', {}) | |
| 319 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 320 | self.assert_qmp(result, 'return', {}) | |
| 321 | ||
| 322 | # Reopen a raw image and see the effect of changing the 'offset' option | |
| 323 | def test_reopen_raw(self): | |
| 324 | opts = {'driver': 'raw', 'node-name': 'hd0', | |
| 325 | 'file': { 'driver': 'file', | |
| 326 | 'filename': hd_path[0], | |
| 327 | 'node-name': 'hd0-file' } } | |
| 328 | ||
| 329 | # First we create a 2MB raw file, and fill each half with a | |
| 330 | # different value | |
| 331 | qemu_img('create', '-f', 'raw', hd_path[0], '2M') | |
| 332 | qemu_io('-f', 'raw', '-c', 'write -P 0xa0 0 1M', hd_path[0]) | |
| 333 | qemu_io('-f', 'raw', '-c', 'write -P 0xa1 1M 1M', hd_path[0]) | |
| 334 | ||
| 335 | # Open the raw file with QEMU | |
| 336 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 337 | self.assert_qmp(result, 'return', {}) | |
| 338 | ||
| 339 | # Read 1MB from offset 0 | |
| 340 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 341 | ||
| 342 | # Reopen the image with a 1MB offset. | |
| 343 | # Now the results are different | |
| 344 | self.reopen(opts, {'offset': 1024*1024}) | |
| 345 | self.run_qemu_io("hd0", "read -P 0xa1 0 1M") | |
| 346 | ||
| 347 | # Reopen again with the original options. | |
| 348 | # We get the original results again | |
| 349 | self.reopen(opts) | |
| 350 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 351 | ||
| 352 | # Remove the block device | |
| 353 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 354 | self.assert_qmp(result, 'return', {}) | |
| 355 | ||
| 356 | # Omitting an option should reset it to the default value, but if | |
| 357 | # an option cannot be changed it shouldn't be possible to reset it | |
| 358 | # to its default value either | |
| 359 | def test_reset_default_values(self): | |
| 360 | opts = {'driver': 'qcow2', 'node-name': 'hd0', | |
| 361 | 'file': { 'driver': 'file', | |
| 362 | 'filename': hd_path[0], | |
| 363 | 'x-check-cache-dropped': True, # This one can be changed | |
| 364 | 'locking': 'off', # This one can NOT be changed | |
| 365 | 'node-name': 'hd0-file' } } | |
| 366 | ||
| 367 | # Open the file with QEMU | |
| 368 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 369 | self.assert_qmp(result, 'return', {}) | |
| 370 | ||
| 371 | # file.x-check-cache-dropped can be changed... | |
| 372 | self.reopen(opts, { 'file.x-check-cache-dropped': False }) | |
| 373 | # ...and dropped completely (resetting to the default value) | |
| 374 | del opts['file']['x-check-cache-dropped'] | |
| 375 | self.reopen(opts) | |
| 376 | ||
| 377 | # file.locking cannot be changed nor reset to the default value | |
| 378 | self.reopen(opts, { 'file.locking': 'on' }, "Cannot change the option 'locking'") | |
| 379 | del opts['file']['locking'] | |
| 380 | self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") | |
| 381 | # But we can reopen it if we maintain its previous value | |
| 382 | self.reopen(opts, { 'file.locking': 'off' }) | |
| 383 | ||
| 384 | # Remove the block device | |
| 385 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 386 | self.assert_qmp(result, 'return', {}) | |
| 387 | ||
| 388 | # This test modifies the node graph a few times by changing the | |
| 389 | # 'backing' option on reopen and verifies that the guest data that | |
| 390 | # is read afterwards is consistent with the graph changes. | |
| 391 | def test_io_with_graph_changes(self): | |
| 392 | opts = [] | |
| 393 | ||
| 394 | # Open hd0, hd1 and hd2 without any backing image | |
| 395 | for i in range(3): | |
| 396 | opts.append(hd_opts(i)) | |
| 397 | opts[i]['backing'] = None | |
| 398 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) | |
| 399 | self.assert_qmp(result, 'return', {}) | |
| 400 | ||
| 401 | # hd0 | |
| 402 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 403 | self.run_qemu_io("hd0", "read -P 0 1M 1M") | |
| 404 | self.run_qemu_io("hd0", "read -P 0 2M 1M") | |
| 405 | ||
| 406 | # hd1 <- hd0 | |
| 407 | self.reopen(opts[0], {'backing': 'hd1'}) | |
| 408 | ||
| 409 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 410 | self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") | |
| 411 | self.run_qemu_io("hd0", "read -P 0 2M 1M") | |
| 412 | ||
| 413 | # hd1 <- hd0 , hd1 <- hd2 | |
| 414 | self.reopen(opts[2], {'backing': 'hd1'}) | |
| 415 | ||
| 416 | self.run_qemu_io("hd2", "read -P 0 0 1M") | |
| 417 | self.run_qemu_io("hd2", "read -P 0xa1 1M 1M") | |
| 418 | self.run_qemu_io("hd2", "read -P 0xa2 2M 1M") | |
| 419 | ||
| 420 | # hd1 <- hd2 <- hd0 | |
| 421 | self.reopen(opts[0], {'backing': 'hd2'}) | |
| 422 | ||
| 423 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 424 | self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") | |
| 425 | self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") | |
| 426 | ||
| 427 | # hd2 <- hd0 | |
| 428 | self.reopen(opts[2], {'backing': None}) | |
| 429 | ||
| 430 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 431 | self.run_qemu_io("hd0", "read -P 0 1M 1M") | |
| 432 | self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") | |
| 433 | ||
| 434 | # hd2 <- hd1 <- hd0 | |
| 435 | self.reopen(opts[1], {'backing': 'hd2'}) | |
| 436 | self.reopen(opts[0], {'backing': 'hd1'}) | |
| 437 | ||
| 438 | self.run_qemu_io("hd0", "read -P 0xa0 0 1M") | |
| 439 | self.run_qemu_io("hd0", "read -P 0xa1 1M 1M") | |
| 440 | self.run_qemu_io("hd0", "read -P 0xa2 2M 1M") | |
| 441 | ||
| 442 | # Illegal operation: hd2 is a child of hd1 | |
| 443 | self.reopen(opts[2], {'backing': 'hd1'}, | |
| 444 | "Making 'hd1' a backing file of 'hd2' would create a cycle") | |
| 445 | ||
| 446 | # hd2 <- hd0, hd2 <- hd1 | |
| 447 | self.reopen(opts[0], {'backing': 'hd2'}) | |
| 448 | ||
| 449 | self.run_qemu_io("hd1", "read -P 0 0 1M") | |
| 450 | self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") | |
| 451 | self.run_qemu_io("hd1", "read -P 0xa2 2M 1M") | |
| 452 | ||
| 453 | # More illegal operations | |
| 454 | self.reopen(opts[2], {'backing': 'hd1'}, | |
| 455 | "Making 'hd1' a backing file of 'hd2' would create a cycle") | |
| 456 | self.reopen(opts[2], {'file': 'hd0-file'}, "Cannot change the option 'file'") | |
| 457 | ||
| 458 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') | |
| 459 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 460 | self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") | |
| 461 | ||
| 462 | # hd1 doesn't have a backing file now | |
| 463 | self.reopen(opts[1], {'backing': None}) | |
| 464 | ||
| 465 | self.run_qemu_io("hd1", "read -P 0 0 1M") | |
| 466 | self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") | |
| 467 | self.run_qemu_io("hd1", "read -P 0 2M 1M") | |
| 468 | ||
| 469 | # We can't remove the 'backing' option if the image has a | |
| 470 | # default backing file | |
| 471 | del opts[1]['backing'] | |
| 472 | self.reopen(opts[1], {}, "backing is missing for 'hd1'") | |
| 473 | ||
| 474 | self.run_qemu_io("hd1", "read -P 0 0 1M") | |
| 475 | self.run_qemu_io("hd1", "read -P 0xa1 1M 1M") | |
| 476 | self.run_qemu_io("hd1", "read -P 0 2M 1M") | |
| 477 | ||
| 478 | # This test verifies that we can't change the children of a block | |
| 479 | # device during a reopen operation in a way that would create | |
| 480 | # cycles in the node graph | |
| 9442bebe | 481 | @iotests.skip_if_unsupported(['blkverify']) |
| bf3e50f6 AG |
482 | def test_graph_cycles(self): |
| 483 | opts = [] | |
| 484 | ||
| 485 | # Open all three images without backing file | |
| 486 | for i in range(3): | |
| 487 | opts.append(hd_opts(i)) | |
| 488 | opts[i]['backing'] = None | |
| 489 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i]) | |
| 490 | self.assert_qmp(result, 'return', {}) | |
| 491 | ||
| 492 | # hd1 <- hd0, hd1 <- hd2 | |
| 493 | self.reopen(opts[0], {'backing': 'hd1'}) | |
| 494 | self.reopen(opts[2], {'backing': 'hd1'}) | |
| 495 | ||
| 496 | # Illegal: hd2 is backed by hd1 | |
| 497 | self.reopen(opts[1], {'backing': 'hd2'}, | |
| 498 | "Making 'hd2' a backing file of 'hd1' would create a cycle") | |
| 499 | ||
| 500 | # hd1 <- hd0 <- hd2 | |
| 501 | self.reopen(opts[2], {'backing': 'hd0'}) | |
| 502 | ||
| 503 | # Illegal: hd2 is backed by hd0, which is backed by hd1 | |
| 504 | self.reopen(opts[1], {'backing': 'hd2'}, | |
| 505 | "Making 'hd2' a backing file of 'hd1' would create a cycle") | |
| 506 | ||
| 507 | # Illegal: hd1 cannot point to itself | |
| 508 | self.reopen(opts[1], {'backing': 'hd1'}, | |
| 509 | "Making 'hd1' a backing file of 'hd1' would create a cycle") | |
| 510 | ||
| 511 | # Remove all backing files | |
| 512 | self.reopen(opts[0]) | |
| 513 | self.reopen(opts[2]) | |
| 514 | ||
| 515 | ########################################## | |
| 516 | # Add a blkverify node using hd0 and hd1 # | |
| 517 | ########################################## | |
| 518 | bvopts = {'driver': 'blkverify', | |
| 519 | 'node-name': 'bv', | |
| 520 | 'test': 'hd0', | |
| 521 | 'raw': 'hd1'} | |
| 522 | result = self.vm.qmp('blockdev-add', conv_keys = False, **bvopts) | |
| 523 | self.assert_qmp(result, 'return', {}) | |
| 524 | ||
| 525 | # blkverify doesn't currently allow reopening. TODO: implement this | |
| 526 | self.reopen(bvopts, {}, "Block format 'blkverify' used by node 'bv'" + | |
| 527 | " does not support reopening files") | |
| 528 | ||
| 529 | # Illegal: hd0 is a child of the blkverify node | |
| 530 | self.reopen(opts[0], {'backing': 'bv'}, | |
| 531 | "Making 'bv' a backing file of 'hd0' would create a cycle") | |
| 532 | ||
| 533 | # Delete the blkverify node | |
| 534 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bv') | |
| 535 | self.assert_qmp(result, 'return', {}) | |
| 536 | ||
| 537 | # Misc reopen tests with different block drivers | |
| 9442bebe | 538 | @iotests.skip_if_unsupported(['quorum', 'throttle']) |
| bf3e50f6 AG |
539 | def test_misc_drivers(self): |
| 540 | #################### | |
| 541 | ###### quorum ###### | |
| 542 | #################### | |
| 543 | for i in range(3): | |
| 544 | opts = hd_opts(i) | |
| 545 | # Open all three images without backing file | |
| 546 | opts['backing'] = None | |
| 547 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 548 | self.assert_qmp(result, 'return', {}) | |
| 549 | ||
| 550 | opts = {'driver': 'quorum', | |
| 551 | 'node-name': 'quorum0', | |
| 552 | 'children': ['hd0', 'hd1', 'hd2'], | |
| 553 | 'vote-threshold': 2} | |
| 554 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 555 | self.assert_qmp(result, 'return', {}) | |
| 556 | ||
| 557 | # Quorum doesn't currently allow reopening. TODO: implement this | |
| 558 | self.reopen(opts, {}, "Block format 'quorum' used by node 'quorum0'" + | |
| 559 | " does not support reopening files") | |
| 560 | ||
| 561 | # You can't make quorum0 a backing file of hd0: | |
| 562 | # hd0 is already a child of quorum0. | |
| 563 | self.reopen(hd_opts(0), {'backing': 'quorum0'}, | |
| 564 | "Making 'quorum0' a backing file of 'hd0' would create a cycle") | |
| 565 | ||
| 566 | # Delete quorum0 | |
| 567 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'quorum0') | |
| 568 | self.assert_qmp(result, 'return', {}) | |
| 569 | ||
| 570 | # Delete hd0, hd1 and hd2 | |
| 571 | for i in range(3): | |
| 572 | result = self.vm.qmp('blockdev-del', conv_keys = True, | |
| 573 | node_name = 'hd%d' % i) | |
| 574 | self.assert_qmp(result, 'return', {}) | |
| 575 | ||
| 576 | ###################### | |
| 577 | ###### blkdebug ###### | |
| 578 | ###################### | |
| 579 | opts = {'driver': 'blkdebug', | |
| 580 | 'node-name': 'bd', | |
| 581 | 'config': '/dev/null', | |
| 582 | 'image': hd_opts(0)} | |
| 583 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 584 | self.assert_qmp(result, 'return', {}) | |
| 585 | ||
| 586 | # blkdebug allows reopening if we keep the same options | |
| 587 | self.reopen(opts) | |
| 588 | ||
| 589 | # but it currently does not allow changes | |
| 590 | self.reopen(opts, {'image': 'hd1'}, "Cannot change the option 'image'") | |
| 591 | self.reopen(opts, {'align': 33554432}, "Cannot change the option 'align'") | |
| 592 | self.reopen(opts, {'config': '/non/existent'}, "Cannot change the option 'config'") | |
| 593 | del opts['config'] | |
| 594 | self.reopen(opts, {}, "Option 'config' cannot be reset to its default value") | |
| 595 | ||
| 596 | # Delete the blkdebug node | |
| 597 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bd') | |
| 598 | self.assert_qmp(result, 'return', {}) | |
| 599 | ||
| 600 | ################## | |
| 601 | ###### null ###### | |
| 602 | ################## | |
| a6f8f9f8 | 603 | opts = {'driver': 'null-co', 'node-name': 'root', 'size': 1024} |
| bf3e50f6 AG |
604 | |
| 605 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 606 | self.assert_qmp(result, 'return', {}) | |
| 607 | ||
| 608 | # 1 << 30 is the default value, but we cannot change it explicitly | |
| 609 | self.reopen(opts, {'size': (1 << 30)}, "Cannot change the option 'size'") | |
| 610 | ||
| 611 | # We cannot change 'size' back to its default value either | |
| 612 | del opts['size'] | |
| 613 | self.reopen(opts, {}, "Option 'size' cannot be reset to its default value") | |
| 614 | ||
| 615 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'root') | |
| 616 | self.assert_qmp(result, 'return', {}) | |
| 617 | ||
| 618 | ################## | |
| 619 | ###### file ###### | |
| 620 | ################## | |
| 621 | opts = hd_opts(0) | |
| 622 | opts['file']['locking'] = 'on' | |
| 623 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 624 | self.assert_qmp(result, 'return', {}) | |
| 625 | ||
| 626 | # 'locking' cannot be changed | |
| 627 | del opts['file']['locking'] | |
| 628 | self.reopen(opts, {'file.locking': 'on'}) | |
| 629 | self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'") | |
| 630 | self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") | |
| 631 | ||
| 632 | # Trying to reopen the 'file' node directly does not make a difference | |
| 633 | opts = opts['file'] | |
| 634 | self.reopen(opts, {'locking': 'on'}) | |
| 635 | self.reopen(opts, {'locking': 'off'}, "Cannot change the option 'locking'") | |
| 636 | self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value") | |
| 637 | ||
| 638 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 639 | self.assert_qmp(result, 'return', {}) | |
| 640 | ||
| 641 | ###################### | |
| 642 | ###### throttle ###### | |
| 643 | ###################### | |
| 644 | opts = { 'qom-type': 'throttle-group', 'id': 'group0', | |
| 645 | 'props': { 'limits': { 'iops-total': 1000 } } } | |
| 646 | result = self.vm.qmp('object-add', conv_keys = False, **opts) | |
| 647 | self.assert_qmp(result, 'return', {}) | |
| 648 | ||
| 649 | opts = { 'qom-type': 'throttle-group', 'id': 'group1', | |
| 650 | 'props': { 'limits': { 'iops-total': 2000 } } } | |
| 651 | result = self.vm.qmp('object-add', conv_keys = False, **opts) | |
| 652 | self.assert_qmp(result, 'return', {}) | |
| 653 | ||
| 654 | # Add a throttle filter with group = group0 | |
| 655 | opts = { 'driver': 'throttle', 'node-name': 'throttle0', | |
| 656 | 'throttle-group': 'group0', 'file': hd_opts(0) } | |
| 657 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 658 | self.assert_qmp(result, 'return', {}) | |
| 659 | ||
| 660 | # We can reopen it if we keep the same options | |
| 661 | self.reopen(opts) | |
| 662 | ||
| 663 | # We can also reopen if 'file' is a reference to the child | |
| 664 | self.reopen(opts, {'file': 'hd0'}) | |
| 665 | ||
| 666 | # This is illegal | |
| 667 | self.reopen(opts, {'throttle-group': 'notfound'}, "Throttle group 'notfound' does not exist") | |
| 668 | ||
| 669 | # But it's possible to change the group to group1 | |
| 670 | self.reopen(opts, {'throttle-group': 'group1'}) | |
| 671 | ||
| 672 | # Now group1 is in use, it cannot be deleted | |
| 673 | result = self.vm.qmp('object-del', id = 'group1') | |
| 674 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 675 | self.assert_qmp(result, 'error/desc', "object 'group1' is in use, can not be deleted") | |
| 676 | ||
| 677 | # Default options, this switches the group back to group0 | |
| 678 | self.reopen(opts) | |
| 679 | ||
| 680 | # So now we cannot delete group0 | |
| 681 | result = self.vm.qmp('object-del', id = 'group0') | |
| 682 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 683 | self.assert_qmp(result, 'error/desc', "object 'group0' is in use, can not be deleted") | |
| 684 | ||
| 685 | # But group1 is free this time, and it can be deleted | |
| 686 | result = self.vm.qmp('object-del', id = 'group1') | |
| 687 | self.assert_qmp(result, 'return', {}) | |
| 688 | ||
| 689 | # Let's delete the filter node | |
| 690 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'throttle0') | |
| 691 | self.assert_qmp(result, 'return', {}) | |
| 692 | ||
| 693 | # And we can finally get rid of group0 | |
| 694 | result = self.vm.qmp('object-del', id = 'group0') | |
| 695 | self.assert_qmp(result, 'return', {}) | |
| 696 | ||
| 697 | # If an image has a backing file then the 'backing' option must be | |
| 698 | # passed on reopen. We don't allow leaving the option out in this | |
| 699 | # case because it's unclear what the correct semantics would be. | |
| 700 | def test_missing_backing_options_1(self): | |
| 701 | # hd2 | |
| 702 | opts = hd_opts(2) | |
| 703 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 704 | self.assert_qmp(result, 'return', {}) | |
| 705 | ||
| 706 | # hd0 | |
| 707 | opts = hd_opts(0) | |
| 708 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 709 | self.assert_qmp(result, 'return', {}) | |
| 710 | ||
| 711 | # hd0 has no backing file: we can omit the 'backing' option | |
| 712 | self.reopen(opts) | |
| 713 | ||
| 714 | # hd2 <- hd0 | |
| 715 | self.reopen(opts, {'backing': 'hd2'}) | |
| 716 | ||
| 717 | # hd0 has a backing file: we must set the 'backing' option | |
| 718 | self.reopen(opts, {}, "backing is missing for 'hd0'") | |
| 719 | ||
| 720 | # hd2 can't be removed because it's the backing file of hd0 | |
| 721 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') | |
| 722 | self.assert_qmp(result, 'error/class', 'GenericError') | |
| 723 | self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'") | |
| 724 | ||
| 725 | # Detach hd2 from hd0. | |
| 726 | self.reopen(opts, {'backing': None}) | |
| 727 | self.reopen(opts, {}, "backing is missing for 'hd0'") | |
| 728 | ||
| 729 | # Remove both hd0 and hd2 | |
| 730 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 731 | self.assert_qmp(result, 'return', {}) | |
| 732 | ||
| 733 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2') | |
| 734 | self.assert_qmp(result, 'return', {}) | |
| 735 | ||
| 736 | # If an image has default backing file (as part of its metadata) | |
| 737 | # then the 'backing' option must be passed on reopen. We don't | |
| 738 | # allow leaving the option out in this case because it's unclear | |
| 739 | # what the correct semantics would be. | |
| 740 | def test_missing_backing_options_2(self): | |
| 741 | # hd0 <- hd1 | |
| 742 | # (hd0 is hd1's default backing file) | |
| 743 | opts = hd_opts(1) | |
| 744 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 745 | self.assert_qmp(result, 'return', {}) | |
| 746 | ||
| 747 | # hd1 has a backing file: we can't omit the 'backing' option | |
| 748 | self.reopen(opts, {}, "backing is missing for 'hd1'") | |
| 749 | ||
| 750 | # Let's detach the backing file | |
| 751 | self.reopen(opts, {'backing': None}) | |
| 752 | ||
| 753 | # No backing file attached to hd1 now, but we still can't omit the 'backing' option | |
| 754 | self.reopen(opts, {}, "backing is missing for 'hd1'") | |
| 755 | ||
| 756 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1') | |
| 757 | self.assert_qmp(result, 'return', {}) | |
| 758 | ||
| 759 | # Test that making 'backing' a reference to an existing child | |
| 760 | # keeps its current options | |
| 761 | def test_backing_reference(self): | |
| 762 | # hd2 <- hd1 <- hd0 | |
| 763 | opts = hd_opts(0) | |
| 764 | opts['backing'] = hd_opts(1) | |
| 765 | opts['backing']['backing'] = hd_opts(2) | |
| 766 | # Enable 'detect-zeroes' on all three nodes | |
| 767 | opts['detect-zeroes'] = 'on' | |
| 768 | opts['backing']['detect-zeroes'] = 'on' | |
| 769 | opts['backing']['backing']['detect-zeroes'] = 'on' | |
| 770 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 771 | self.assert_qmp(result, 'return', {}) | |
| 772 | ||
| 773 | # Reopen the chain passing the minimum amount of required options. | |
| 774 | # By making 'backing' a reference to hd1 (instead of a sub-dict) | |
| 775 | # we tell QEMU to keep its current set of options. | |
| 776 | opts = {'driver': iotests.imgfmt, | |
| 777 | 'node-name': 'hd0', | |
| 778 | 'file': 'hd0-file', | |
| 779 | 'backing': 'hd1' } | |
| 780 | self.reopen(opts) | |
| 781 | ||
| 782 | # This has reset 'detect-zeroes' on hd0, but not on hd1 and hd2. | |
| 783 | self.assert_qmp(self.get_node('hd0'), 'detect_zeroes', 'off') | |
| 784 | self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on') | |
| 785 | self.assert_qmp(self.get_node('hd2'), 'detect_zeroes', 'on') | |
| 786 | ||
| 787 | # Test what happens if the graph changes due to other operations | |
| 788 | # such as block-stream | |
| 789 | def test_block_stream_1(self): | |
| 790 | # hd1 <- hd0 | |
| 791 | opts = hd_opts(0) | |
| 792 | opts['backing'] = hd_opts(1) | |
| 793 | opts['backing']['backing'] = None | |
| 794 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 795 | self.assert_qmp(result, 'return', {}) | |
| 796 | ||
| 797 | # Stream hd1 into hd0 and wait until it's done | |
| 798 | result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', device = 'hd0') | |
| 799 | self.assert_qmp(result, 'return', {}) | |
| 800 | self.wait_until_completed(drive = 'stream0') | |
| 801 | ||
| 802 | # Now we have only hd0 | |
| 803 | self.assertEqual(self.get_node('hd1'), None) | |
| 804 | ||
| 805 | # We have backing.* options but there's no backing file anymore | |
| 806 | self.reopen(opts, {}, "Cannot change the option 'backing.driver'") | |
| 807 | ||
| 808 | # If we remove the 'backing' option then we can reopen hd0 just fine | |
| 809 | del opts['backing'] | |
| 810 | self.reopen(opts) | |
| 811 | ||
| 812 | # We can also reopen hd0 if we set 'backing' to null | |
| 813 | self.reopen(opts, {'backing': None}) | |
| 814 | ||
| 815 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 816 | self.assert_qmp(result, 'return', {}) | |
| 817 | ||
| 818 | # Another block_stream test | |
| 819 | def test_block_stream_2(self): | |
| 820 | # hd2 <- hd1 <- hd0 | |
| 821 | opts = hd_opts(0) | |
| 822 | opts['backing'] = hd_opts(1) | |
| 823 | opts['backing']['backing'] = hd_opts(2) | |
| 824 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 825 | self.assert_qmp(result, 'return', {}) | |
| 826 | ||
| 827 | # Stream hd1 into hd0 and wait until it's done | |
| 828 | result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', | |
| 829 | device = 'hd0', base_node = 'hd2') | |
| 830 | self.assert_qmp(result, 'return', {}) | |
| 831 | self.wait_until_completed(drive = 'stream0') | |
| 832 | ||
| 833 | # The chain is hd2 <- hd0 now. hd1 is missing | |
| 834 | self.assertEqual(self.get_node('hd1'), None) | |
| 835 | ||
| 836 | # The backing options in the dict were meant for hd1, but we cannot | |
| 837 | # use them with hd2 because hd1 had a backing file while hd2 does not. | |
| 838 | self.reopen(opts, {}, "Cannot change the option 'backing.driver'") | |
| 839 | ||
| 840 | # If we remove hd1's options from the dict then things work fine | |
| 841 | opts['backing'] = opts['backing']['backing'] | |
| 842 | self.reopen(opts) | |
| 843 | ||
| 844 | # We can also reopen hd0 if we use a reference to the backing file | |
| 845 | self.reopen(opts, {'backing': 'hd2'}) | |
| 846 | ||
| 847 | # But we cannot leave the option out | |
| 848 | del opts['backing'] | |
| 849 | self.reopen(opts, {}, "backing is missing for 'hd0'") | |
| 850 | ||
| 851 | # Now we can delete hd0 (and hd2) | |
| 852 | result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0') | |
| 853 | self.assert_qmp(result, 'return', {}) | |
| 854 | self.assertEqual(self.get_node('hd2'), None) | |
| 855 | ||
| 856 | # Reopen the chain during a block-stream job (from hd1 to hd0) | |
| 857 | def test_block_stream_3(self): | |
| 858 | # hd2 <- hd1 <- hd0 | |
| 859 | opts = hd_opts(0) | |
| 860 | opts['backing'] = hd_opts(1) | |
| 861 | opts['backing']['backing'] = hd_opts(2) | |
| 862 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 863 | self.assert_qmp(result, 'return', {}) | |
| 864 | ||
| 865 | # hd2 <- hd0 | |
| 866 | result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', | |
| c423a6af HR |
867 | device = 'hd0', base_node = 'hd2', |
| 868 | auto_finalize = False) | |
| bf3e50f6 AG |
869 | self.assert_qmp(result, 'return', {}) |
| 870 | ||
| c624b015 | 871 | # We can remove hd2 while the stream job is ongoing |
| bf3e50f6 | 872 | opts['backing']['backing'] = None |
| c624b015 | 873 | self.reopen(opts, {}) |
| bf3e50f6 AG |
874 | |
| 875 | # We can't remove hd1 while the stream job is ongoing | |
| 876 | opts['backing'] = None | |
| 877 | self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'") | |
| 878 | ||
| c423a6af | 879 | self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) |
| bf3e50f6 AG |
880 | |
| 881 | # Reopen the chain during a block-stream job (from hd2 to hd1) | |
| 882 | def test_block_stream_4(self): | |
| 883 | # hd2 <- hd1 <- hd0 | |
| 884 | opts = hd_opts(0) | |
| 885 | opts['backing'] = hd_opts(1) | |
| 886 | opts['backing']['backing'] = hd_opts(2) | |
| 887 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 888 | self.assert_qmp(result, 'return', {}) | |
| 889 | ||
| 890 | # hd1 <- hd0 | |
| 891 | result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', | |
| c423a6af | 892 | device = 'hd1', auto_finalize = False) |
| bf3e50f6 AG |
893 | self.assert_qmp(result, 'return', {}) |
| 894 | ||
| 895 | # We can't reopen with the original options because that would | |
| 896 | # make hd1 read-only and block-stream requires it to be read-write | |
| c423a6af HR |
897 | # (Which error message appears depends on whether the stream job is |
| 898 | # already done with copying at this point.) | |
| 899 | self.reopen(opts, {}, | |
| 900 | ["Can't set node 'hd1' to r/o with copy-on-read enabled", | |
| 901 | "Cannot make block node read-only, there is a writer on it"]) | |
| bf3e50f6 AG |
902 | |
| 903 | # We can't remove hd2 while the stream job is ongoing | |
| 904 | opts['backing']['backing'] = None | |
| 905 | self.reopen(opts, {'backing.read-only': False}, "Cannot change 'backing' link from 'hd1' to 'hd2'") | |
| 906 | ||
| 907 | # We can detach hd1 from hd0 because it doesn't affect the stream job | |
| 908 | opts['backing'] = None | |
| 909 | self.reopen(opts) | |
| 910 | ||
| c423a6af | 911 | self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True) |
| bf3e50f6 AG |
912 | |
| 913 | # Reopen the chain during a block-commit job (from hd0 to hd2) | |
| 914 | def test_block_commit_1(self): | |
| 915 | # hd2 <- hd1 <- hd0 | |
| 916 | opts = hd_opts(0) | |
| 917 | opts['backing'] = hd_opts(1) | |
| 918 | opts['backing']['backing'] = hd_opts(2) | |
| 919 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 920 | self.assert_qmp(result, 'return', {}) | |
| 921 | ||
| 922 | result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', | |
| c423a6af | 923 | device = 'hd0') |
| bf3e50f6 AG |
924 | self.assert_qmp(result, 'return', {}) |
| 925 | ||
| 926 | # We can't remove hd2 while the commit job is ongoing | |
| 927 | opts['backing']['backing'] = None | |
| 928 | self.reopen(opts, {}, "Cannot change 'backing' link from 'hd1' to 'hd2'") | |
| 929 | ||
| 930 | # We can't remove hd1 while the commit job is ongoing | |
| 931 | opts['backing'] = None | |
| 932 | self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'") | |
| 933 | ||
| 934 | event = self.vm.event_wait(name='BLOCK_JOB_READY') | |
| 935 | self.assert_qmp(event, 'data/device', 'commit0') | |
| 936 | self.assert_qmp(event, 'data/type', 'commit') | |
| 937 | self.assert_qmp_absent(event, 'data/error') | |
| 938 | ||
| 939 | result = self.vm.qmp('block-job-complete', device='commit0') | |
| 940 | self.assert_qmp(result, 'return', {}) | |
| 941 | ||
| 942 | self.wait_until_completed(drive = 'commit0') | |
| 943 | ||
| 944 | # Reopen the chain during a block-commit job (from hd1 to hd2) | |
| 945 | def test_block_commit_2(self): | |
| 946 | # hd2 <- hd1 <- hd0 | |
| 947 | opts = hd_opts(0) | |
| 948 | opts['backing'] = hd_opts(1) | |
| 949 | opts['backing']['backing'] = hd_opts(2) | |
| 950 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 951 | self.assert_qmp(result, 'return', {}) | |
| 952 | ||
| 953 | result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0', | |
| c423a6af HR |
954 | device = 'hd0', top_node = 'hd1', |
| 955 | auto_finalize = False) | |
| bf3e50f6 AG |
956 | self.assert_qmp(result, 'return', {}) |
| 957 | ||
| 958 | # We can't remove hd2 while the commit job is ongoing | |
| 959 | opts['backing']['backing'] = None | |
| 960 | self.reopen(opts, {}, "Cannot change the option 'backing.driver'") | |
| 961 | ||
| 962 | # We can't remove hd1 while the commit job is ongoing | |
| 963 | opts['backing'] = None | |
| 964 | self.reopen(opts, {}, "Cannot change backing link if 'hd0' has an implicit backing file") | |
| 965 | ||
| 966 | # hd2 <- hd0 | |
| c423a6af | 967 | self.vm.run_job('commit0', auto_finalize = False, auto_dismiss = True) |
| bf3e50f6 AG |
968 | |
| 969 | self.assert_qmp(self.get_node('hd0'), 'ro', False) | |
| 970 | self.assertEqual(self.get_node('hd1'), None) | |
| 971 | self.assert_qmp(self.get_node('hd2'), 'ro', True) | |
| 972 | ||
| 97518e11 | 973 | def run_test_iothreads(self, iothread_a, iothread_b, errmsg = None): |
| bf3e50f6 AG |
974 | opts = hd_opts(0) |
| 975 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) | |
| 976 | self.assert_qmp(result, 'return', {}) | |
| 977 | ||
| 978 | opts2 = hd_opts(2) | |
| 979 | result = self.vm.qmp('blockdev-add', conv_keys = False, **opts2) | |
| 980 | self.assert_qmp(result, 'return', {}) | |
| 981 | ||
| 982 | result = self.vm.qmp('object-add', qom_type='iothread', id='iothread0') | |
| 983 | self.assert_qmp(result, 'return', {}) | |
| 984 | ||
| 985 | result = self.vm.qmp('object-add', qom_type='iothread', id='iothread1') | |
| 986 | self.assert_qmp(result, 'return', {}) | |
| 987 | ||
| 97518e11 KW |
988 | result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi0', |
| 989 | iothread=iothread_a) | |
| bf3e50f6 AG |
990 | self.assert_qmp(result, 'return', {}) |
| 991 | ||
| 97518e11 KW |
992 | result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi1', |
| 993 | iothread=iothread_b) | |
| bf3e50f6 AG |
994 | self.assert_qmp(result, 'return', {}) |
| 995 | ||
| 97518e11 KW |
996 | if iothread_a: |
| 997 | result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd0', | |
| 998 | share_rw=True, bus="scsi0.0") | |
| 999 | self.assert_qmp(result, 'return', {}) | |
| bf3e50f6 | 1000 | |
| 97518e11 KW |
1001 | if iothread_b: |
| 1002 | result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd2', | |
| 1003 | share_rw=True, bus="scsi1.0") | |
| 1004 | self.assert_qmp(result, 'return', {}) | |
| bf3e50f6 | 1005 | |
| 97518e11 KW |
1006 | # Attaching the backing file may or may not work |
| 1007 | self.reopen(opts, {'backing': 'hd2'}, errmsg) | |
| 1008 | ||
| 1009 | # But removing the backing file should always work | |
| 1010 | self.reopen(opts, {'backing': None}) | |
| 1011 | ||
| 1012 | self.vm.shutdown() | |
| 1013 | ||
| 1014 | # We don't allow setting a backing file that uses a different AioContext if | |
| 1015 | # neither of them can switch to the other AioContext | |
| 1016 | def test_iothreads_error(self): | |
| 1017 | self.run_test_iothreads('iothread0', 'iothread1', | |
| 1de6b45f | 1018 | "Cannot change iothread of active block backend") |
| 97518e11 KW |
1019 | |
| 1020 | def test_iothreads_compatible_users(self): | |
| 1021 | self.run_test_iothreads('iothread0', 'iothread0') | |
| 1022 | ||
| 1023 | def test_iothreads_switch_backing(self): | |
| 1de6b45f | 1024 | self.run_test_iothreads('iothread0', None) |
| 97518e11 KW |
1025 | |
| 1026 | def test_iothreads_switch_overlay(self): | |
| 1de6b45f | 1027 | self.run_test_iothreads(None, 'iothread0') |
| bf3e50f6 AG |
1028 | |
| 1029 | if __name__ == '__main__': | |
| 103cbc77 HR |
1030 | iotests.main(supported_fmts=["qcow2"], |
| 1031 | supported_protocols=["file"]) |