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Commit | Line | Data |
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6a143727 KW |
1 | /* |
2 | * Block protocol for I/O error injection | |
3 | * | |
63188c24 | 4 | * Copyright (C) 2016-2017 Red Hat, Inc. |
6a143727 KW |
5 | * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com> |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
80c71a24 | 26 | #include "qemu/osdep.h" |
da34e65c | 27 | #include "qapi/error.h" |
f348b6d1 | 28 | #include "qemu/cutils.h" |
1de7afc9 | 29 | #include "qemu/config-file.h" |
737e150e | 30 | #include "block/block_int.h" |
69c6449f | 31 | #include "block/qdict.h" |
1de7afc9 | 32 | #include "qemu/module.h" |
922a01a0 | 33 | #include "qemu/option.h" |
69c6449f | 34 | #include "qapi/qapi-visit-block-core.h" |
2c31b04c | 35 | #include "qapi/qmp/qdict.h" |
69c6449f | 36 | #include "qapi/qmp/qlist.h" |
2c31b04c | 37 | #include "qapi/qmp/qstring.h" |
69c6449f | 38 | #include "qapi/qobject-input-visitor.h" |
20873526 | 39 | #include "sysemu/qtest.h" |
6a143727 KW |
40 | |
41 | typedef struct BDRVBlkdebugState { | |
571cd43e | 42 | int state; |
8f96b5be | 43 | int new_state; |
3dc834f8 | 44 | uint64_t align; |
430b26a8 EB |
45 | uint64_t max_transfer; |
46 | uint64_t opt_write_zero; | |
47 | uint64_t max_write_zero; | |
48 | uint64_t opt_discard; | |
49 | uint64_t max_discard; | |
3c90c65d | 50 | |
69c6449f HR |
51 | uint64_t take_child_perms; |
52 | uint64_t unshare_child_perms; | |
53 | ||
036990d7 HR |
54 | /* For blkdebug_refresh_filename() */ |
55 | char *config_file; | |
56 | ||
7fb1cf16 | 57 | QLIST_HEAD(, BlkdebugRule) rules[BLKDBG__MAX]; |
571cd43e | 58 | QSIMPLEQ_HEAD(, BlkdebugRule) active_rules; |
3c90c65d | 59 | QLIST_HEAD(, BlkdebugSuspendedReq) suspended_reqs; |
6a143727 KW |
60 | } BDRVBlkdebugState; |
61 | ||
b9f66d96 | 62 | typedef struct BlkdebugAIOCB { |
7c84b1b8 | 63 | BlockAIOCB common; |
b9f66d96 KW |
64 | int ret; |
65 | } BlkdebugAIOCB; | |
66 | ||
3c90c65d KW |
67 | typedef struct BlkdebugSuspendedReq { |
68 | Coroutine *co; | |
69 | char *tag; | |
70 | QLIST_ENTRY(BlkdebugSuspendedReq) next; | |
71 | } BlkdebugSuspendedReq; | |
72 | ||
8b9b0cc2 KW |
73 | enum { |
74 | ACTION_INJECT_ERROR, | |
75 | ACTION_SET_STATE, | |
3c90c65d | 76 | ACTION_SUSPEND, |
8b9b0cc2 KW |
77 | }; |
78 | ||
79 | typedef struct BlkdebugRule { | |
a31939e6 | 80 | BlkdebugEvent event; |
8b9b0cc2 KW |
81 | int action; |
82 | int state; | |
83 | union { | |
84 | struct { | |
16789db3 | 85 | uint64_t iotype_mask; |
8b9b0cc2 KW |
86 | int error; |
87 | int immediately; | |
88 | int once; | |
7c3a9985 | 89 | int64_t offset; |
8b9b0cc2 KW |
90 | } inject; |
91 | struct { | |
92 | int new_state; | |
93 | } set_state; | |
3c90c65d KW |
94 | struct { |
95 | char *tag; | |
96 | } suspend; | |
8b9b0cc2 KW |
97 | } options; |
98 | QLIST_ENTRY(BlkdebugRule) next; | |
571cd43e | 99 | QSIMPLEQ_ENTRY(BlkdebugRule) active_next; |
8b9b0cc2 KW |
100 | } BlkdebugRule; |
101 | ||
16789db3 HR |
102 | QEMU_BUILD_BUG_MSG(BLKDEBUG_IO_TYPE__MAX > 64, |
103 | "BlkdebugIOType mask does not fit into an uint64_t"); | |
104 | ||
8b9b0cc2 KW |
105 | static QemuOptsList inject_error_opts = { |
106 | .name = "inject-error", | |
107 | .head = QTAILQ_HEAD_INITIALIZER(inject_error_opts.head), | |
108 | .desc = { | |
109 | { | |
110 | .name = "event", | |
111 | .type = QEMU_OPT_STRING, | |
112 | }, | |
113 | { | |
114 | .name = "state", | |
115 | .type = QEMU_OPT_NUMBER, | |
116 | }, | |
16789db3 HR |
117 | { |
118 | .name = "iotype", | |
119 | .type = QEMU_OPT_STRING, | |
120 | }, | |
8b9b0cc2 KW |
121 | { |
122 | .name = "errno", | |
123 | .type = QEMU_OPT_NUMBER, | |
124 | }, | |
e4780db4 PB |
125 | { |
126 | .name = "sector", | |
127 | .type = QEMU_OPT_NUMBER, | |
128 | }, | |
8b9b0cc2 KW |
129 | { |
130 | .name = "once", | |
131 | .type = QEMU_OPT_BOOL, | |
132 | }, | |
133 | { | |
134 | .name = "immediately", | |
135 | .type = QEMU_OPT_BOOL, | |
136 | }, | |
137 | { /* end of list */ } | |
138 | }, | |
139 | }; | |
140 | ||
141 | static QemuOptsList set_state_opts = { | |
142 | .name = "set-state", | |
327cdad4 | 143 | .head = QTAILQ_HEAD_INITIALIZER(set_state_opts.head), |
8b9b0cc2 KW |
144 | .desc = { |
145 | { | |
146 | .name = "event", | |
147 | .type = QEMU_OPT_STRING, | |
148 | }, | |
149 | { | |
150 | .name = "state", | |
151 | .type = QEMU_OPT_NUMBER, | |
152 | }, | |
153 | { | |
154 | .name = "new_state", | |
155 | .type = QEMU_OPT_NUMBER, | |
156 | }, | |
157 | { /* end of list */ } | |
158 | }, | |
159 | }; | |
160 | ||
161 | static QemuOptsList *config_groups[] = { | |
162 | &inject_error_opts, | |
163 | &set_state_opts, | |
164 | NULL | |
165 | }; | |
166 | ||
8b9b0cc2 KW |
167 | struct add_rule_data { |
168 | BDRVBlkdebugState *s; | |
169 | int action; | |
170 | }; | |
171 | ||
28d0de7a | 172 | static int add_rule(void *opaque, QemuOpts *opts, Error **errp) |
8b9b0cc2 KW |
173 | { |
174 | struct add_rule_data *d = opaque; | |
175 | BDRVBlkdebugState *s = d->s; | |
5f14f31d | 176 | const char *event_name; |
f9509d15 | 177 | int event; |
8b9b0cc2 | 178 | struct BlkdebugRule *rule; |
7c3a9985 | 179 | int64_t sector; |
16789db3 HR |
180 | BlkdebugIOType iotype; |
181 | Error *local_error = NULL; | |
8b9b0cc2 KW |
182 | |
183 | /* Find the right event for the rule */ | |
184 | event_name = qemu_opt_get(opts, "event"); | |
d4362d64 | 185 | if (!event_name) { |
8809cfc3 | 186 | error_setg(errp, "Missing event name for rule"); |
d4362d64 | 187 | return -1; |
f9509d15 | 188 | } |
f7abe0ec | 189 | event = qapi_enum_parse(&BlkdebugEvent_lookup, event_name, -1, errp); |
f9509d15 | 190 | if (event < 0) { |
8b9b0cc2 KW |
191 | return -1; |
192 | } | |
193 | ||
194 | /* Set attributes common for all actions */ | |
7267c094 | 195 | rule = g_malloc0(sizeof(*rule)); |
8b9b0cc2 KW |
196 | *rule = (struct BlkdebugRule) { |
197 | .event = event, | |
198 | .action = d->action, | |
199 | .state = qemu_opt_get_number(opts, "state", 0), | |
200 | }; | |
201 | ||
202 | /* Parse action-specific options */ | |
203 | switch (d->action) { | |
204 | case ACTION_INJECT_ERROR: | |
205 | rule->options.inject.error = qemu_opt_get_number(opts, "errno", EIO); | |
206 | rule->options.inject.once = qemu_opt_get_bool(opts, "once", 0); | |
207 | rule->options.inject.immediately = | |
208 | qemu_opt_get_bool(opts, "immediately", 0); | |
7c3a9985 KW |
209 | sector = qemu_opt_get_number(opts, "sector", -1); |
210 | rule->options.inject.offset = | |
211 | sector == -1 ? -1 : sector * BDRV_SECTOR_SIZE; | |
16789db3 HR |
212 | |
213 | iotype = qapi_enum_parse(&BlkdebugIOType_lookup, | |
214 | qemu_opt_get(opts, "iotype"), | |
215 | BLKDEBUG_IO_TYPE__MAX, &local_error); | |
216 | if (local_error) { | |
217 | error_propagate(errp, local_error); | |
5b4c95d0 | 218 | g_free(rule); |
16789db3 HR |
219 | return -1; |
220 | } | |
221 | if (iotype != BLKDEBUG_IO_TYPE__MAX) { | |
222 | rule->options.inject.iotype_mask = (1ull << iotype); | |
223 | } else { | |
224 | /* Apply the default */ | |
225 | rule->options.inject.iotype_mask = | |
226 | (1ull << BLKDEBUG_IO_TYPE_READ) | |
227 | | (1ull << BLKDEBUG_IO_TYPE_WRITE) | |
228 | | (1ull << BLKDEBUG_IO_TYPE_WRITE_ZEROES) | |
229 | | (1ull << BLKDEBUG_IO_TYPE_DISCARD) | |
230 | | (1ull << BLKDEBUG_IO_TYPE_FLUSH); | |
231 | } | |
232 | ||
8b9b0cc2 KW |
233 | break; |
234 | ||
235 | case ACTION_SET_STATE: | |
236 | rule->options.set_state.new_state = | |
237 | qemu_opt_get_number(opts, "new_state", 0); | |
238 | break; | |
3c90c65d KW |
239 | |
240 | case ACTION_SUSPEND: | |
241 | rule->options.suspend.tag = | |
242 | g_strdup(qemu_opt_get(opts, "tag")); | |
243 | break; | |
8b9b0cc2 KW |
244 | }; |
245 | ||
246 | /* Add the rule */ | |
247 | QLIST_INSERT_HEAD(&s->rules[event], rule, next); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
9e35542b KW |
252 | static void remove_rule(BlkdebugRule *rule) |
253 | { | |
254 | switch (rule->action) { | |
255 | case ACTION_INJECT_ERROR: | |
256 | case ACTION_SET_STATE: | |
257 | break; | |
3c90c65d KW |
258 | case ACTION_SUSPEND: |
259 | g_free(rule->options.suspend.tag); | |
260 | break; | |
9e35542b KW |
261 | } |
262 | ||
263 | QLIST_REMOVE(rule, next); | |
264 | g_free(rule); | |
265 | } | |
266 | ||
89f2b21e HR |
267 | static int read_config(BDRVBlkdebugState *s, const char *filename, |
268 | QDict *options, Error **errp) | |
8b9b0cc2 | 269 | { |
85a040e5 | 270 | FILE *f = NULL; |
8b9b0cc2 KW |
271 | int ret; |
272 | struct add_rule_data d; | |
89f2b21e | 273 | Error *local_err = NULL; |
8b9b0cc2 | 274 | |
85a040e5 HR |
275 | if (filename) { |
276 | f = fopen(filename, "r"); | |
277 | if (f == NULL) { | |
278 | error_setg_errno(errp, errno, "Could not read blkdebug config file"); | |
279 | return -errno; | |
280 | } | |
8b9b0cc2 | 281 | |
f7544edc | 282 | ret = qemu_config_parse(f, config_groups, filename, errp); |
85a040e5 | 283 | if (ret < 0) { |
85a040e5 HR |
284 | goto fail; |
285 | } | |
8b9b0cc2 KW |
286 | } |
287 | ||
89f2b21e | 288 | qemu_config_parse_qdict(options, config_groups, &local_err); |
84d18f06 | 289 | if (local_err) { |
89f2b21e HR |
290 | error_propagate(errp, local_err); |
291 | ret = -EINVAL; | |
292 | goto fail; | |
293 | } | |
294 | ||
8b9b0cc2 KW |
295 | d.s = s; |
296 | d.action = ACTION_INJECT_ERROR; | |
8809cfc3 | 297 | qemu_opts_foreach(&inject_error_opts, add_rule, &d, &local_err); |
d4362d64 SH |
298 | if (local_err) { |
299 | error_propagate(errp, local_err); | |
300 | ret = -EINVAL; | |
301 | goto fail; | |
302 | } | |
8b9b0cc2 KW |
303 | |
304 | d.action = ACTION_SET_STATE; | |
8809cfc3 | 305 | qemu_opts_foreach(&set_state_opts, add_rule, &d, &local_err); |
d4362d64 SH |
306 | if (local_err) { |
307 | error_propagate(errp, local_err); | |
308 | ret = -EINVAL; | |
309 | goto fail; | |
310 | } | |
8b9b0cc2 KW |
311 | |
312 | ret = 0; | |
313 | fail: | |
698f0d52 KW |
314 | qemu_opts_reset(&inject_error_opts); |
315 | qemu_opts_reset(&set_state_opts); | |
85a040e5 HR |
316 | if (f) { |
317 | fclose(f); | |
318 | } | |
8b9b0cc2 KW |
319 | return ret; |
320 | } | |
321 | ||
322 | /* Valid blkdebug filenames look like blkdebug:path/to/config:path/to/image */ | |
f4681212 KW |
323 | static void blkdebug_parse_filename(const char *filename, QDict *options, |
324 | Error **errp) | |
6a143727 | 325 | { |
f4681212 | 326 | const char *c; |
6a143727 | 327 | |
8b9b0cc2 | 328 | /* Parse the blkdebug: prefix */ |
f4681212 | 329 | if (!strstart(filename, "blkdebug:", &filename)) { |
d4881b9b HR |
330 | /* There was no prefix; therefore, all options have to be already |
331 | present in the QDict (except for the filename) */ | |
46f5ac20 | 332 | qdict_put_str(options, "x-image", filename); |
f4681212 | 333 | return; |
6a143727 | 334 | } |
6a143727 | 335 | |
f4681212 | 336 | /* Parse config file path */ |
8b9b0cc2 KW |
337 | c = strchr(filename, ':'); |
338 | if (c == NULL) { | |
f4681212 KW |
339 | error_setg(errp, "blkdebug requires both config file and image path"); |
340 | return; | |
8b9b0cc2 KW |
341 | } |
342 | ||
f4681212 KW |
343 | if (c != filename) { |
344 | QString *config_path; | |
ba891d68 | 345 | config_path = qstring_from_substr(filename, 0, c - filename); |
f4681212 | 346 | qdict_put(options, "config", config_path); |
8b9b0cc2 | 347 | } |
f4681212 KW |
348 | |
349 | /* TODO Allow multi-level nesting and set file.filename here */ | |
8b9b0cc2 | 350 | filename = c + 1; |
46f5ac20 | 351 | qdict_put_str(options, "x-image", filename); |
f4681212 KW |
352 | } |
353 | ||
69c6449f HR |
354 | static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options, |
355 | const char *prefix, Error **errp) | |
356 | { | |
357 | int ret = 0; | |
358 | QDict *subqdict = NULL; | |
359 | QObject *crumpled_subqdict = NULL; | |
360 | Visitor *v = NULL; | |
361 | BlockPermissionList *perm_list = NULL, *element; | |
69c6449f HR |
362 | |
363 | *dest = 0; | |
364 | ||
365 | qdict_extract_subqdict(options, &subqdict, prefix); | |
366 | if (!qdict_size(subqdict)) { | |
367 | goto out; | |
368 | } | |
369 | ||
370 | crumpled_subqdict = qdict_crumple(subqdict, errp); | |
371 | if (!crumpled_subqdict) { | |
372 | ret = -EINVAL; | |
373 | goto out; | |
374 | } | |
375 | ||
376 | v = qobject_input_visitor_new(crumpled_subqdict); | |
af175e85 | 377 | if (!visit_type_BlockPermissionList(v, NULL, &perm_list, errp)) { |
69c6449f HR |
378 | ret = -EINVAL; |
379 | goto out; | |
380 | } | |
381 | ||
382 | for (element = perm_list; element; element = element->next) { | |
383 | *dest |= bdrv_qapi_perm_to_blk_perm(element->value); | |
384 | } | |
385 | ||
386 | out: | |
387 | qapi_free_BlockPermissionList(perm_list); | |
388 | visit_free(v); | |
389 | qobject_unref(subqdict); | |
390 | qobject_unref(crumpled_subqdict); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | static int blkdebug_parse_perms(BDRVBlkdebugState *s, QDict *options, | |
395 | Error **errp) | |
396 | { | |
397 | int ret; | |
398 | ||
399 | ret = blkdebug_parse_perm_list(&s->take_child_perms, options, | |
400 | "take-child-perms.", errp); | |
401 | if (ret < 0) { | |
402 | return ret; | |
403 | } | |
404 | ||
405 | ret = blkdebug_parse_perm_list(&s->unshare_child_perms, options, | |
406 | "unshare-child-perms.", errp); | |
407 | if (ret < 0) { | |
408 | return ret; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
f4681212 KW |
414 | static QemuOptsList runtime_opts = { |
415 | .name = "blkdebug", | |
416 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
417 | .desc = { | |
418 | { | |
419 | .name = "config", | |
420 | .type = QEMU_OPT_STRING, | |
421 | .help = "Path to the configuration file", | |
422 | }, | |
423 | { | |
424 | .name = "x-image", | |
425 | .type = QEMU_OPT_STRING, | |
426 | .help = "[internal use only, will be removed]", | |
427 | }, | |
b35ee7fb KW |
428 | { |
429 | .name = "align", | |
430 | .type = QEMU_OPT_SIZE, | |
431 | .help = "Required alignment in bytes", | |
432 | }, | |
430b26a8 EB |
433 | { |
434 | .name = "max-transfer", | |
435 | .type = QEMU_OPT_SIZE, | |
436 | .help = "Maximum transfer size in bytes", | |
437 | }, | |
438 | { | |
439 | .name = "opt-write-zero", | |
440 | .type = QEMU_OPT_SIZE, | |
441 | .help = "Optimum write zero alignment in bytes", | |
442 | }, | |
443 | { | |
444 | .name = "max-write-zero", | |
445 | .type = QEMU_OPT_SIZE, | |
446 | .help = "Maximum write zero size in bytes", | |
447 | }, | |
448 | { | |
449 | .name = "opt-discard", | |
450 | .type = QEMU_OPT_SIZE, | |
451 | .help = "Optimum discard alignment in bytes", | |
452 | }, | |
453 | { | |
454 | .name = "max-discard", | |
455 | .type = QEMU_OPT_SIZE, | |
456 | .help = "Maximum discard size in bytes", | |
457 | }, | |
f4681212 KW |
458 | { /* end of list */ } |
459 | }, | |
460 | }; | |
461 | ||
015a1036 HR |
462 | static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, |
463 | Error **errp) | |
f4681212 KW |
464 | { |
465 | BDRVBlkdebugState *s = bs->opaque; | |
466 | QemuOpts *opts; | |
f4681212 | 467 | int ret; |
430b26a8 | 468 | uint64_t align; |
f4681212 | 469 | |
87ea75d5 | 470 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
af175e85 | 471 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
f4681212 | 472 | ret = -EINVAL; |
eaf944a4 | 473 | goto out; |
f4681212 KW |
474 | } |
475 | ||
89f2b21e | 476 | /* Read rules from config file or command line options */ |
036990d7 HR |
477 | s->config_file = g_strdup(qemu_opt_get(opts, "config")); |
478 | ret = read_config(s, s->config_file, options, errp); | |
85a040e5 | 479 | if (ret) { |
eaf944a4 | 480 | goto out; |
f4681212 | 481 | } |
8b9b0cc2 | 482 | |
8db520ce | 483 | /* Set initial state */ |
571cd43e | 484 | s->state = 1; |
8db520ce | 485 | |
69c6449f HR |
486 | /* Parse permissions modifiers before opening the image file */ |
487 | ret = blkdebug_parse_perms(s, options, errp); | |
488 | if (ret < 0) { | |
489 | goto out; | |
490 | } | |
491 | ||
6b826af7 | 492 | /* Open the image file */ |
9a4f4c31 | 493 | bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "image", |
b3af2af4 HR |
494 | bs, &child_of_bds, |
495 | BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, | |
bc520249 VSO |
496 | false, errp); |
497 | if (!bs->file) { | |
9a4f4c31 | 498 | ret = -EINVAL; |
eaf944a4 | 499 | goto out; |
8b9b0cc2 KW |
500 | } |
501 | ||
228345bf HR |
502 | bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED | |
503 | (BDRV_REQ_FUA & bs->file->bs->supported_write_flags); | |
504 | bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED | | |
80f5c33f | 505 | ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & |
228345bf | 506 | bs->file->bs->supported_zero_flags); |
3dc834f8 | 507 | ret = -EINVAL; |
63188c24 | 508 | |
430b26a8 | 509 | /* Set alignment overrides */ |
3dc834f8 EB |
510 | s->align = qemu_opt_get_size(opts, "align", 0); |
511 | if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) { | |
512 | error_setg(errp, "Cannot meet constraints with align %" PRIu64, | |
513 | s->align); | |
de234897 | 514 | goto out; |
b35ee7fb | 515 | } |
430b26a8 EB |
516 | align = MAX(s->align, bs->file->bs->bl.request_alignment); |
517 | ||
518 | s->max_transfer = qemu_opt_get_size(opts, "max-transfer", 0); | |
519 | if (s->max_transfer && | |
520 | (s->max_transfer >= INT_MAX || | |
521 | !QEMU_IS_ALIGNED(s->max_transfer, align))) { | |
522 | error_setg(errp, "Cannot meet constraints with max-transfer %" PRIu64, | |
523 | s->max_transfer); | |
524 | goto out; | |
525 | } | |
526 | ||
527 | s->opt_write_zero = qemu_opt_get_size(opts, "opt-write-zero", 0); | |
528 | if (s->opt_write_zero && | |
529 | (s->opt_write_zero >= INT_MAX || | |
530 | !QEMU_IS_ALIGNED(s->opt_write_zero, align))) { | |
531 | error_setg(errp, "Cannot meet constraints with opt-write-zero %" PRIu64, | |
532 | s->opt_write_zero); | |
533 | goto out; | |
534 | } | |
535 | ||
536 | s->max_write_zero = qemu_opt_get_size(opts, "max-write-zero", 0); | |
537 | if (s->max_write_zero && | |
538 | (s->max_write_zero >= INT_MAX || | |
539 | !QEMU_IS_ALIGNED(s->max_write_zero, | |
540 | MAX(s->opt_write_zero, align)))) { | |
541 | error_setg(errp, "Cannot meet constraints with max-write-zero %" PRIu64, | |
542 | s->max_write_zero); | |
543 | goto out; | |
544 | } | |
545 | ||
546 | s->opt_discard = qemu_opt_get_size(opts, "opt-discard", 0); | |
547 | if (s->opt_discard && | |
548 | (s->opt_discard >= INT_MAX || | |
549 | !QEMU_IS_ALIGNED(s->opt_discard, align))) { | |
550 | error_setg(errp, "Cannot meet constraints with opt-discard %" PRIu64, | |
551 | s->opt_discard); | |
552 | goto out; | |
553 | } | |
554 | ||
555 | s->max_discard = qemu_opt_get_size(opts, "max-discard", 0); | |
556 | if (s->max_discard && | |
557 | (s->max_discard >= INT_MAX || | |
558 | !QEMU_IS_ALIGNED(s->max_discard, | |
559 | MAX(s->opt_discard, align)))) { | |
560 | error_setg(errp, "Cannot meet constraints with max-discard %" PRIu64, | |
561 | s->max_discard); | |
562 | goto out; | |
563 | } | |
b35ee7fb | 564 | |
f8cec157 HR |
565 | bdrv_debug_event(bs, BLKDBG_NONE); |
566 | ||
f4681212 | 567 | ret = 0; |
eaf944a4 | 568 | out: |
036990d7 HR |
569 | if (ret < 0) { |
570 | g_free(s->config_file); | |
571 | } | |
f4681212 KW |
572 | qemu_opts_del(opts); |
573 | return ret; | |
6a143727 KW |
574 | } |
575 | ||
16789db3 HR |
576 | static int rule_check(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
577 | BlkdebugIOType iotype) | |
b9f66d96 KW |
578 | { |
579 | BDRVBlkdebugState *s = bs->opaque; | |
d157ed5f EB |
580 | BlkdebugRule *rule = NULL; |
581 | int error; | |
582 | bool immediately; | |
583 | ||
584 | QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { | |
585 | uint64_t inject_offset = rule->options.inject.offset; | |
586 | ||
16789db3 HR |
587 | if ((inject_offset == -1 || |
588 | (bytes && inject_offset >= offset && | |
589 | inject_offset < offset + bytes)) && | |
590 | (rule->options.inject.iotype_mask & (1ull << iotype))) | |
d157ed5f EB |
591 | { |
592 | break; | |
593 | } | |
594 | } | |
595 | ||
596 | if (!rule || !rule->options.inject.error) { | |
597 | return 0; | |
598 | } | |
599 | ||
600 | immediately = rule->options.inject.immediately; | |
601 | error = rule->options.inject.error; | |
b9f66d96 | 602 | |
571cd43e | 603 | if (rule->options.inject.once) { |
a069e2f1 JS |
604 | QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next); |
605 | remove_rule(rule); | |
b9f66d96 KW |
606 | } |
607 | ||
7c3a9985 | 608 | if (!immediately) { |
e5c67ab5 | 609 | aio_co_schedule(qemu_get_current_aio_context(), qemu_coroutine_self()); |
7c3a9985 | 610 | qemu_coroutine_yield(); |
b9f66d96 KW |
611 | } |
612 | ||
7c3a9985 | 613 | return -error; |
b9f66d96 KW |
614 | } |
615 | ||
7c3a9985 KW |
616 | static int coroutine_fn |
617 | blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
618 | QEMUIOVector *qiov, int flags) | |
6a143727 | 619 | { |
d157ed5f | 620 | int err; |
e4780db4 | 621 | |
e0ef4395 EB |
622 | /* Sanity check block layer guarantees */ |
623 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
624 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); | |
625 | if (bs->bl.max_transfer) { | |
626 | assert(bytes <= bs->bl.max_transfer); | |
627 | } | |
628 | ||
16789db3 | 629 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_READ); |
d157ed5f EB |
630 | if (err) { |
631 | return err; | |
b9f66d96 KW |
632 | } |
633 | ||
7c3a9985 | 634 | return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags); |
6a143727 KW |
635 | } |
636 | ||
7c3a9985 KW |
637 | static int coroutine_fn |
638 | blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
639 | QEMUIOVector *qiov, int flags) | |
6a143727 | 640 | { |
d157ed5f | 641 | int err; |
e4780db4 | 642 | |
e0ef4395 EB |
643 | /* Sanity check block layer guarantees */ |
644 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
645 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); | |
646 | if (bs->bl.max_transfer) { | |
647 | assert(bytes <= bs->bl.max_transfer); | |
648 | } | |
649 | ||
16789db3 | 650 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_WRITE); |
d157ed5f EB |
651 | if (err) { |
652 | return err; | |
b9f66d96 KW |
653 | } |
654 | ||
7c3a9985 | 655 | return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags); |
6a143727 KW |
656 | } |
657 | ||
7c3a9985 | 658 | static int blkdebug_co_flush(BlockDriverState *bs) |
9e52c53b | 659 | { |
16789db3 | 660 | int err = rule_check(bs, 0, 0, BLKDEBUG_IO_TYPE_FLUSH); |
9e52c53b | 661 | |
d157ed5f EB |
662 | if (err) { |
663 | return err; | |
9e52c53b PB |
664 | } |
665 | ||
7c3a9985 | 666 | return bdrv_co_flush(bs->file->bs); |
9e52c53b PB |
667 | } |
668 | ||
63188c24 | 669 | static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs, |
f5a5ca79 | 670 | int64_t offset, int bytes, |
63188c24 EB |
671 | BdrvRequestFlags flags) |
672 | { | |
673 | uint32_t align = MAX(bs->bl.request_alignment, | |
674 | bs->bl.pwrite_zeroes_alignment); | |
675 | int err; | |
676 | ||
677 | /* Only pass through requests that are larger than requested | |
678 | * preferred alignment (so that we test the fallback to writes on | |
679 | * unaligned portions), and check that the block layer never hands | |
680 | * us anything unaligned that crosses an alignment boundary. */ | |
f5a5ca79 | 681 | if (bytes < align) { |
63188c24 | 682 | assert(QEMU_IS_ALIGNED(offset, align) || |
f5a5ca79 | 683 | QEMU_IS_ALIGNED(offset + bytes, align) || |
63188c24 | 684 | DIV_ROUND_UP(offset, align) == |
f5a5ca79 | 685 | DIV_ROUND_UP(offset + bytes, align)); |
63188c24 EB |
686 | return -ENOTSUP; |
687 | } | |
688 | assert(QEMU_IS_ALIGNED(offset, align)); | |
f5a5ca79 | 689 | assert(QEMU_IS_ALIGNED(bytes, align)); |
63188c24 | 690 | if (bs->bl.max_pwrite_zeroes) { |
f5a5ca79 | 691 | assert(bytes <= bs->bl.max_pwrite_zeroes); |
63188c24 EB |
692 | } |
693 | ||
16789db3 | 694 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_WRITE_ZEROES); |
63188c24 EB |
695 | if (err) { |
696 | return err; | |
697 | } | |
698 | ||
f5a5ca79 | 699 | return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags); |
63188c24 EB |
700 | } |
701 | ||
702 | static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs, | |
f5a5ca79 | 703 | int64_t offset, int bytes) |
63188c24 EB |
704 | { |
705 | uint32_t align = bs->bl.pdiscard_alignment; | |
706 | int err; | |
707 | ||
708 | /* Only pass through requests that are larger than requested | |
709 | * minimum alignment, and ensure that unaligned requests do not | |
710 | * cross optimum discard boundaries. */ | |
f5a5ca79 | 711 | if (bytes < bs->bl.request_alignment) { |
63188c24 | 712 | assert(QEMU_IS_ALIGNED(offset, align) || |
f5a5ca79 | 713 | QEMU_IS_ALIGNED(offset + bytes, align) || |
63188c24 | 714 | DIV_ROUND_UP(offset, align) == |
f5a5ca79 | 715 | DIV_ROUND_UP(offset + bytes, align)); |
63188c24 EB |
716 | return -ENOTSUP; |
717 | } | |
718 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
f5a5ca79 MP |
719 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); |
720 | if (align && bytes >= align) { | |
63188c24 | 721 | assert(QEMU_IS_ALIGNED(offset, align)); |
f5a5ca79 | 722 | assert(QEMU_IS_ALIGNED(bytes, align)); |
63188c24 EB |
723 | } |
724 | if (bs->bl.max_pdiscard) { | |
f5a5ca79 | 725 | assert(bytes <= bs->bl.max_pdiscard); |
63188c24 EB |
726 | } |
727 | ||
16789db3 | 728 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_DISCARD); |
63188c24 EB |
729 | if (err) { |
730 | return err; | |
731 | } | |
732 | ||
0b9fd3f4 | 733 | return bdrv_co_pdiscard(bs->file, offset, bytes); |
63188c24 | 734 | } |
3c90c65d | 735 | |
3e4d0e72 EB |
736 | static int coroutine_fn blkdebug_co_block_status(BlockDriverState *bs, |
737 | bool want_zero, | |
738 | int64_t offset, | |
739 | int64_t bytes, | |
740 | int64_t *pnum, | |
741 | int64_t *map, | |
742 | BlockDriverState **file) | |
efa6e2ed | 743 | { |
1adb0b5e HR |
744 | int err; |
745 | ||
3e4d0e72 | 746 | assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); |
1adb0b5e HR |
747 | |
748 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_BLOCK_STATUS); | |
749 | if (err) { | |
750 | return err; | |
751 | } | |
752 | ||
549ec0d9 HR |
753 | assert(bs->file && bs->file->bs); |
754 | *pnum = bytes; | |
755 | *map = offset; | |
756 | *file = bs->file->bs; | |
757 | return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; | |
efa6e2ed EB |
758 | } |
759 | ||
6a143727 KW |
760 | static void blkdebug_close(BlockDriverState *bs) |
761 | { | |
762 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
763 | BlkdebugRule *rule, *next; |
764 | int i; | |
765 | ||
7fb1cf16 | 766 | for (i = 0; i < BLKDBG__MAX; i++) { |
8b9b0cc2 | 767 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
9e35542b | 768 | remove_rule(rule); |
8b9b0cc2 KW |
769 | } |
770 | } | |
036990d7 HR |
771 | |
772 | g_free(s->config_file); | |
6a143727 KW |
773 | } |
774 | ||
3c90c65d KW |
775 | static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule) |
776 | { | |
777 | BDRVBlkdebugState *s = bs->opaque; | |
f48ff5af | 778 | BlkdebugSuspendedReq *r; |
3c90c65d | 779 | |
f48ff5af EGE |
780 | r = g_new(BlkdebugSuspendedReq, 1); |
781 | ||
782 | r->co = qemu_coroutine_self(); | |
783 | r->tag = g_strdup(rule->options.suspend.tag); | |
3c90c65d KW |
784 | |
785 | remove_rule(rule); | |
f48ff5af | 786 | QLIST_INSERT_HEAD(&s->suspended_reqs, r, next); |
3c90c65d | 787 | |
20873526 | 788 | if (!qtest_enabled()) { |
f48ff5af | 789 | printf("blkdebug: Suspended request '%s'\n", r->tag); |
20873526 | 790 | } |
3c90c65d | 791 | qemu_coroutine_yield(); |
3c90c65d KW |
792 | } |
793 | ||
571cd43e | 794 | static bool process_rule(BlockDriverState *bs, struct BlkdebugRule *rule, |
8f96b5be | 795 | bool injected) |
8b9b0cc2 KW |
796 | { |
797 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
798 | |
799 | /* Only process rules for the current state */ | |
8f96b5be | 800 | if (rule->state && rule->state != s->state) { |
571cd43e | 801 | return injected; |
8b9b0cc2 KW |
802 | } |
803 | ||
804 | /* Take the action */ | |
805 | switch (rule->action) { | |
806 | case ACTION_INJECT_ERROR: | |
571cd43e PB |
807 | if (!injected) { |
808 | QSIMPLEQ_INIT(&s->active_rules); | |
809 | injected = true; | |
810 | } | |
811 | QSIMPLEQ_INSERT_HEAD(&s->active_rules, rule, active_next); | |
8b9b0cc2 KW |
812 | break; |
813 | ||
814 | case ACTION_SET_STATE: | |
8f96b5be | 815 | s->new_state = rule->options.set_state.new_state; |
8b9b0cc2 | 816 | break; |
3c90c65d KW |
817 | |
818 | case ACTION_SUSPEND: | |
819 | suspend_request(bs, rule); | |
820 | break; | |
8b9b0cc2 | 821 | } |
571cd43e | 822 | return injected; |
8b9b0cc2 KW |
823 | } |
824 | ||
a31939e6 | 825 | static void blkdebug_debug_event(BlockDriverState *bs, BlkdebugEvent event) |
8b9b0cc2 KW |
826 | { |
827 | BDRVBlkdebugState *s = bs->opaque; | |
3c90c65d | 828 | struct BlkdebugRule *rule, *next; |
571cd43e | 829 | bool injected; |
8b9b0cc2 | 830 | |
7fb1cf16 | 831 | assert((int)event >= 0 && event < BLKDBG__MAX); |
8b9b0cc2 | 832 | |
571cd43e | 833 | injected = false; |
8f96b5be | 834 | s->new_state = s->state; |
3c90c65d | 835 | QLIST_FOREACH_SAFE(rule, &s->rules[event], next, next) { |
8f96b5be | 836 | injected = process_rule(bs, rule, injected); |
8b9b0cc2 | 837 | } |
8f96b5be | 838 | s->state = s->new_state; |
8b9b0cc2 KW |
839 | } |
840 | ||
3c90c65d KW |
841 | static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event, |
842 | const char *tag) | |
843 | { | |
844 | BDRVBlkdebugState *s = bs->opaque; | |
845 | struct BlkdebugRule *rule; | |
f9509d15 | 846 | int blkdebug_event; |
3c90c65d | 847 | |
f7abe0ec | 848 | blkdebug_event = qapi_enum_parse(&BlkdebugEvent_lookup, event, -1, NULL); |
f9509d15 | 849 | if (blkdebug_event < 0) { |
3c90c65d KW |
850 | return -ENOENT; |
851 | } | |
852 | ||
3c90c65d KW |
853 | rule = g_malloc(sizeof(*rule)); |
854 | *rule = (struct BlkdebugRule) { | |
855 | .event = blkdebug_event, | |
856 | .action = ACTION_SUSPEND, | |
857 | .state = 0, | |
858 | .options.suspend.tag = g_strdup(tag), | |
859 | }; | |
860 | ||
861 | QLIST_INSERT_HEAD(&s->rules[blkdebug_event], rule, next); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
69d0690c | 866 | static int resume_req_by_tag(BDRVBlkdebugState *s, const char *tag, bool all) |
3c90c65d | 867 | { |
69d0690c | 868 | BlkdebugSuspendedReq *r; |
3c90c65d | 869 | |
69d0690c EGE |
870 | retry: |
871 | /* | |
872 | * No need for _SAFE, since a different coroutine can remove another node | |
873 | * (not the current one) in this list, and when the current one is removed | |
874 | * the iteration starts back from beginning anyways. | |
875 | */ | |
876 | QLIST_FOREACH(r, &s->suspended_reqs, next) { | |
3c90c65d | 877 | if (!strcmp(r->tag, tag)) { |
f48ff5af EGE |
878 | Coroutine *co = r->co; |
879 | ||
880 | if (!qtest_enabled()) { | |
881 | printf("blkdebug: Resuming request '%s'\n", r->tag); | |
882 | } | |
883 | ||
69d0690c | 884 | QLIST_REMOVE(r, next); |
f48ff5af EGE |
885 | g_free(r->tag); |
886 | g_free(r); | |
887 | ||
888 | qemu_coroutine_enter(co); | |
889 | ||
69d0690c EGE |
890 | if (all) { |
891 | goto retry; | |
892 | } | |
3c90c65d KW |
893 | return 0; |
894 | } | |
895 | } | |
896 | return -ENOENT; | |
897 | } | |
898 | ||
69d0690c EGE |
899 | static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag) |
900 | { | |
901 | BDRVBlkdebugState *s = bs->opaque; | |
902 | ||
903 | return resume_req_by_tag(s, tag, false); | |
904 | } | |
905 | ||
4cc70e93 FZ |
906 | static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, |
907 | const char *tag) | |
908 | { | |
909 | BDRVBlkdebugState *s = bs->opaque; | |
4cc70e93 FZ |
910 | BlkdebugRule *rule, *next; |
911 | int i, ret = -ENOENT; | |
912 | ||
7fb1cf16 | 913 | for (i = 0; i < BLKDBG__MAX; i++) { |
4cc70e93 FZ |
914 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
915 | if (rule->action == ACTION_SUSPEND && | |
916 | !strcmp(rule->options.suspend.tag, tag)) { | |
917 | remove_rule(rule); | |
918 | ret = 0; | |
919 | } | |
920 | } | |
921 | } | |
69d0690c EGE |
922 | if (resume_req_by_tag(s, tag, true) == 0) { |
923 | ret = 0; | |
4cc70e93 FZ |
924 | } |
925 | return ret; | |
926 | } | |
3c90c65d KW |
927 | |
928 | static bool blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag) | |
929 | { | |
930 | BDRVBlkdebugState *s = bs->opaque; | |
931 | BlkdebugSuspendedReq *r; | |
932 | ||
933 | QLIST_FOREACH(r, &s->suspended_reqs, next) { | |
934 | if (!strcmp(r->tag, tag)) { | |
935 | return true; | |
936 | } | |
937 | } | |
938 | return false; | |
939 | } | |
940 | ||
e1302255 PB |
941 | static int64_t blkdebug_getlength(BlockDriverState *bs) |
942 | { | |
9a4f4c31 | 943 | return bdrv_getlength(bs->file->bs); |
e1302255 PB |
944 | } |
945 | ||
998b3a1e | 946 | static void blkdebug_refresh_filename(BlockDriverState *bs) |
2c31b04c | 947 | { |
036990d7 | 948 | BDRVBlkdebugState *s = bs->opaque; |
8779441b | 949 | const QDictEntry *e; |
998b3a1e | 950 | int ret; |
2c31b04c | 951 | |
998b3a1e | 952 | if (!bs->file->bs->exact_filename[0]) { |
2c31b04c HR |
953 | return; |
954 | } | |
955 | ||
998b3a1e HR |
956 | for (e = qdict_first(bs->full_open_options); e; |
957 | e = qdict_next(bs->full_open_options, e)) | |
958 | { | |
959 | /* Real child options are under "image", but "x-image" may | |
960 | * contain a filename */ | |
961 | if (strcmp(qdict_entry_key(e), "config") && | |
962 | strcmp(qdict_entry_key(e), "image") && | |
963 | strcmp(qdict_entry_key(e), "x-image") && | |
964 | strcmp(qdict_entry_key(e), "driver")) | |
965 | { | |
966 | return; | |
de81d72d | 967 | } |
8779441b HR |
968 | } |
969 | ||
998b3a1e HR |
970 | ret = snprintf(bs->exact_filename, sizeof(bs->exact_filename), |
971 | "blkdebug:%s:%s", | |
972 | s->config_file ?: "", bs->file->bs->exact_filename); | |
973 | if (ret >= sizeof(bs->exact_filename)) { | |
974 | /* An overflow makes the filename unusable, so do not report any */ | |
975 | bs->exact_filename[0] = 0; | |
2c31b04c | 976 | } |
2c31b04c HR |
977 | } |
978 | ||
835db3ee EB |
979 | static void blkdebug_refresh_limits(BlockDriverState *bs, Error **errp) |
980 | { | |
981 | BDRVBlkdebugState *s = bs->opaque; | |
982 | ||
983 | if (s->align) { | |
a5b8dd2c | 984 | bs->bl.request_alignment = s->align; |
835db3ee | 985 | } |
430b26a8 EB |
986 | if (s->max_transfer) { |
987 | bs->bl.max_transfer = s->max_transfer; | |
988 | } | |
989 | if (s->opt_write_zero) { | |
990 | bs->bl.pwrite_zeroes_alignment = s->opt_write_zero; | |
991 | } | |
992 | if (s->max_write_zero) { | |
993 | bs->bl.max_pwrite_zeroes = s->max_write_zero; | |
994 | } | |
995 | if (s->opt_discard) { | |
996 | bs->bl.pdiscard_alignment = s->opt_discard; | |
997 | } | |
998 | if (s->max_discard) { | |
999 | bs->bl.max_pdiscard = s->max_discard; | |
1000 | } | |
835db3ee EB |
1001 | } |
1002 | ||
c5e8bfb7 KW |
1003 | static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, |
1004 | BlockReopenQueue *queue, Error **errp) | |
1005 | { | |
1006 | return 0; | |
1007 | } | |
1008 | ||
69c6449f | 1009 | static void blkdebug_child_perm(BlockDriverState *bs, BdrvChild *c, |
bf8e925e | 1010 | BdrvChildRole role, |
69c6449f HR |
1011 | BlockReopenQueue *reopen_queue, |
1012 | uint64_t perm, uint64_t shared, | |
1013 | uint64_t *nperm, uint64_t *nshared) | |
1014 | { | |
1015 | BDRVBlkdebugState *s = bs->opaque; | |
1016 | ||
e5d8a406 | 1017 | bdrv_default_perms(bs, c, role, reopen_queue, |
69dca43d | 1018 | perm, shared, nperm, nshared); |
69c6449f HR |
1019 | |
1020 | *nperm |= s->take_child_perms; | |
1021 | *nshared &= ~s->unshare_child_perms; | |
1022 | } | |
1023 | ||
2654267c HR |
1024 | static const char *const blkdebug_strong_runtime_opts[] = { |
1025 | "config", | |
1026 | "inject-error.", | |
1027 | "set-state.", | |
1028 | "align", | |
1029 | "max-transfer", | |
1030 | "opt-write-zero", | |
1031 | "max-write-zero", | |
1032 | "opt-discard", | |
1033 | "max-discard", | |
1034 | ||
1035 | NULL | |
1036 | }; | |
1037 | ||
6a143727 | 1038 | static BlockDriver bdrv_blkdebug = { |
f4681212 KW |
1039 | .format_name = "blkdebug", |
1040 | .protocol_name = "blkdebug", | |
1041 | .instance_size = sizeof(BDRVBlkdebugState), | |
d8e12cd3 | 1042 | .is_filter = true, |
6a143727 | 1043 | |
f4681212 KW |
1044 | .bdrv_parse_filename = blkdebug_parse_filename, |
1045 | .bdrv_file_open = blkdebug_open, | |
1046 | .bdrv_close = blkdebug_close, | |
c5e8bfb7 | 1047 | .bdrv_reopen_prepare = blkdebug_reopen_prepare, |
69c6449f | 1048 | .bdrv_child_perm = blkdebug_child_perm, |
d7010dfb | 1049 | |
f4681212 | 1050 | .bdrv_getlength = blkdebug_getlength, |
2c31b04c | 1051 | .bdrv_refresh_filename = blkdebug_refresh_filename, |
835db3ee | 1052 | .bdrv_refresh_limits = blkdebug_refresh_limits, |
6a143727 | 1053 | |
7c3a9985 KW |
1054 | .bdrv_co_preadv = blkdebug_co_preadv, |
1055 | .bdrv_co_pwritev = blkdebug_co_pwritev, | |
1056 | .bdrv_co_flush_to_disk = blkdebug_co_flush, | |
63188c24 EB |
1057 | .bdrv_co_pwrite_zeroes = blkdebug_co_pwrite_zeroes, |
1058 | .bdrv_co_pdiscard = blkdebug_co_pdiscard, | |
3e4d0e72 | 1059 | .bdrv_co_block_status = blkdebug_co_block_status, |
8b9b0cc2 | 1060 | |
3c90c65d KW |
1061 | .bdrv_debug_event = blkdebug_debug_event, |
1062 | .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, | |
4cc70e93 FZ |
1063 | .bdrv_debug_remove_breakpoint |
1064 | = blkdebug_debug_remove_breakpoint, | |
3c90c65d KW |
1065 | .bdrv_debug_resume = blkdebug_debug_resume, |
1066 | .bdrv_debug_is_suspended = blkdebug_debug_is_suspended, | |
2654267c HR |
1067 | |
1068 | .strong_runtime_opts = blkdebug_strong_runtime_opts, | |
6a143727 KW |
1069 | }; |
1070 | ||
1071 | static void bdrv_blkdebug_init(void) | |
1072 | { | |
1073 | bdrv_register(&bdrv_blkdebug); | |
1074 | } | |
1075 | ||
1076 | block_init(bdrv_blkdebug_init); |