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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" |
e2c1c34f | 30 | #include "block/block-io.h" |
737e150e | 31 | #include "block/block_int.h" |
69c6449f | 32 | #include "block/qdict.h" |
1de7afc9 | 33 | #include "qemu/module.h" |
922a01a0 | 34 | #include "qemu/option.h" |
69c6449f | 35 | #include "qapi/qapi-visit-block-core.h" |
2c31b04c | 36 | #include "qapi/qmp/qdict.h" |
69c6449f | 37 | #include "qapi/qmp/qlist.h" |
2c31b04c | 38 | #include "qapi/qmp/qstring.h" |
69c6449f | 39 | #include "qapi/qobject-input-visitor.h" |
20873526 | 40 | #include "sysemu/qtest.h" |
6a143727 | 41 | |
36109bff EGE |
42 | /* All APIs are thread-safe */ |
43 | ||
6a143727 | 44 | typedef struct BDRVBlkdebugState { |
36109bff | 45 | /* IN: initialized in blkdebug_open() and never changed */ |
3dc834f8 | 46 | uint64_t align; |
430b26a8 EB |
47 | uint64_t max_transfer; |
48 | uint64_t opt_write_zero; | |
49 | uint64_t max_write_zero; | |
50 | uint64_t opt_discard; | |
51 | uint64_t max_discard; | |
36109bff EGE |
52 | char *config_file; /* For blkdebug_refresh_filename() */ |
53 | /* initialized in blkdebug_parse_perms() */ | |
69c6449f HR |
54 | uint64_t take_child_perms; |
55 | uint64_t unshare_child_perms; | |
56 | ||
36109bff EGE |
57 | /* State. Protected by lock */ |
58 | int state; | |
7fb1cf16 | 59 | QLIST_HEAD(, BlkdebugRule) rules[BLKDBG__MAX]; |
571cd43e | 60 | QSIMPLEQ_HEAD(, BlkdebugRule) active_rules; |
3c90c65d | 61 | QLIST_HEAD(, BlkdebugSuspendedReq) suspended_reqs; |
36109bff | 62 | QemuMutex lock; |
6a143727 KW |
63 | } BDRVBlkdebugState; |
64 | ||
b9f66d96 | 65 | typedef struct BlkdebugAIOCB { |
7c84b1b8 | 66 | BlockAIOCB common; |
b9f66d96 KW |
67 | int ret; |
68 | } BlkdebugAIOCB; | |
69 | ||
3c90c65d | 70 | typedef struct BlkdebugSuspendedReq { |
36109bff | 71 | /* IN: initialized in suspend_request() */ |
3c90c65d KW |
72 | Coroutine *co; |
73 | char *tag; | |
36109bff EGE |
74 | |
75 | /* List entry protected BDRVBlkdebugState's lock */ | |
3c90c65d KW |
76 | QLIST_ENTRY(BlkdebugSuspendedReq) next; |
77 | } BlkdebugSuspendedReq; | |
78 | ||
8b9b0cc2 KW |
79 | enum { |
80 | ACTION_INJECT_ERROR, | |
81 | ACTION_SET_STATE, | |
3c90c65d | 82 | ACTION_SUSPEND, |
51a46368 | 83 | ACTION__MAX, |
8b9b0cc2 KW |
84 | }; |
85 | ||
86 | typedef struct BlkdebugRule { | |
36109bff | 87 | /* IN: initialized in add_rule() or blkdebug_debug_breakpoint() */ |
a31939e6 | 88 | BlkdebugEvent event; |
8b9b0cc2 KW |
89 | int action; |
90 | int state; | |
91 | union { | |
92 | struct { | |
16789db3 | 93 | uint64_t iotype_mask; |
8b9b0cc2 KW |
94 | int error; |
95 | int immediately; | |
96 | int once; | |
7c3a9985 | 97 | int64_t offset; |
8b9b0cc2 KW |
98 | } inject; |
99 | struct { | |
100 | int new_state; | |
101 | } set_state; | |
3c90c65d KW |
102 | struct { |
103 | char *tag; | |
104 | } suspend; | |
8b9b0cc2 | 105 | } options; |
36109bff EGE |
106 | |
107 | /* List entries protected BDRVBlkdebugState's lock */ | |
8b9b0cc2 | 108 | QLIST_ENTRY(BlkdebugRule) next; |
571cd43e | 109 | QSIMPLEQ_ENTRY(BlkdebugRule) active_next; |
8b9b0cc2 KW |
110 | } BlkdebugRule; |
111 | ||
16789db3 HR |
112 | QEMU_BUILD_BUG_MSG(BLKDEBUG_IO_TYPE__MAX > 64, |
113 | "BlkdebugIOType mask does not fit into an uint64_t"); | |
114 | ||
8b9b0cc2 KW |
115 | static QemuOptsList inject_error_opts = { |
116 | .name = "inject-error", | |
117 | .head = QTAILQ_HEAD_INITIALIZER(inject_error_opts.head), | |
118 | .desc = { | |
119 | { | |
120 | .name = "event", | |
121 | .type = QEMU_OPT_STRING, | |
122 | }, | |
123 | { | |
124 | .name = "state", | |
125 | .type = QEMU_OPT_NUMBER, | |
126 | }, | |
16789db3 HR |
127 | { |
128 | .name = "iotype", | |
129 | .type = QEMU_OPT_STRING, | |
130 | }, | |
8b9b0cc2 KW |
131 | { |
132 | .name = "errno", | |
133 | .type = QEMU_OPT_NUMBER, | |
134 | }, | |
e4780db4 PB |
135 | { |
136 | .name = "sector", | |
137 | .type = QEMU_OPT_NUMBER, | |
138 | }, | |
8b9b0cc2 KW |
139 | { |
140 | .name = "once", | |
141 | .type = QEMU_OPT_BOOL, | |
142 | }, | |
143 | { | |
144 | .name = "immediately", | |
145 | .type = QEMU_OPT_BOOL, | |
146 | }, | |
147 | { /* end of list */ } | |
148 | }, | |
149 | }; | |
150 | ||
151 | static QemuOptsList set_state_opts = { | |
152 | .name = "set-state", | |
327cdad4 | 153 | .head = QTAILQ_HEAD_INITIALIZER(set_state_opts.head), |
8b9b0cc2 KW |
154 | .desc = { |
155 | { | |
156 | .name = "event", | |
157 | .type = QEMU_OPT_STRING, | |
158 | }, | |
159 | { | |
160 | .name = "state", | |
161 | .type = QEMU_OPT_NUMBER, | |
162 | }, | |
163 | { | |
164 | .name = "new_state", | |
165 | .type = QEMU_OPT_NUMBER, | |
166 | }, | |
167 | { /* end of list */ } | |
168 | }, | |
169 | }; | |
170 | ||
171 | static QemuOptsList *config_groups[] = { | |
172 | &inject_error_opts, | |
173 | &set_state_opts, | |
174 | NULL | |
175 | }; | |
176 | ||
8b9b0cc2 KW |
177 | struct add_rule_data { |
178 | BDRVBlkdebugState *s; | |
179 | int action; | |
180 | }; | |
181 | ||
28d0de7a | 182 | static int add_rule(void *opaque, QemuOpts *opts, Error **errp) |
8b9b0cc2 KW |
183 | { |
184 | struct add_rule_data *d = opaque; | |
185 | BDRVBlkdebugState *s = d->s; | |
5f14f31d | 186 | const char *event_name; |
f9509d15 | 187 | int event; |
8b9b0cc2 | 188 | struct BlkdebugRule *rule; |
7c3a9985 | 189 | int64_t sector; |
16789db3 HR |
190 | BlkdebugIOType iotype; |
191 | Error *local_error = NULL; | |
8b9b0cc2 KW |
192 | |
193 | /* Find the right event for the rule */ | |
194 | event_name = qemu_opt_get(opts, "event"); | |
d4362d64 | 195 | if (!event_name) { |
8809cfc3 | 196 | error_setg(errp, "Missing event name for rule"); |
d4362d64 | 197 | return -1; |
f9509d15 | 198 | } |
f7abe0ec | 199 | event = qapi_enum_parse(&BlkdebugEvent_lookup, event_name, -1, errp); |
f9509d15 | 200 | if (event < 0) { |
8b9b0cc2 KW |
201 | return -1; |
202 | } | |
203 | ||
204 | /* Set attributes common for all actions */ | |
7267c094 | 205 | rule = g_malloc0(sizeof(*rule)); |
8b9b0cc2 KW |
206 | *rule = (struct BlkdebugRule) { |
207 | .event = event, | |
208 | .action = d->action, | |
209 | .state = qemu_opt_get_number(opts, "state", 0), | |
210 | }; | |
211 | ||
212 | /* Parse action-specific options */ | |
213 | switch (d->action) { | |
214 | case ACTION_INJECT_ERROR: | |
215 | rule->options.inject.error = qemu_opt_get_number(opts, "errno", EIO); | |
216 | rule->options.inject.once = qemu_opt_get_bool(opts, "once", 0); | |
217 | rule->options.inject.immediately = | |
218 | qemu_opt_get_bool(opts, "immediately", 0); | |
7c3a9985 KW |
219 | sector = qemu_opt_get_number(opts, "sector", -1); |
220 | rule->options.inject.offset = | |
221 | sector == -1 ? -1 : sector * BDRV_SECTOR_SIZE; | |
16789db3 HR |
222 | |
223 | iotype = qapi_enum_parse(&BlkdebugIOType_lookup, | |
224 | qemu_opt_get(opts, "iotype"), | |
225 | BLKDEBUG_IO_TYPE__MAX, &local_error); | |
226 | if (local_error) { | |
227 | error_propagate(errp, local_error); | |
5b4c95d0 | 228 | g_free(rule); |
16789db3 HR |
229 | return -1; |
230 | } | |
231 | if (iotype != BLKDEBUG_IO_TYPE__MAX) { | |
232 | rule->options.inject.iotype_mask = (1ull << iotype); | |
233 | } else { | |
234 | /* Apply the default */ | |
235 | rule->options.inject.iotype_mask = | |
236 | (1ull << BLKDEBUG_IO_TYPE_READ) | |
237 | | (1ull << BLKDEBUG_IO_TYPE_WRITE) | |
238 | | (1ull << BLKDEBUG_IO_TYPE_WRITE_ZEROES) | |
239 | | (1ull << BLKDEBUG_IO_TYPE_DISCARD) | |
240 | | (1ull << BLKDEBUG_IO_TYPE_FLUSH); | |
241 | } | |
242 | ||
8b9b0cc2 KW |
243 | break; |
244 | ||
245 | case ACTION_SET_STATE: | |
246 | rule->options.set_state.new_state = | |
247 | qemu_opt_get_number(opts, "new_state", 0); | |
248 | break; | |
3c90c65d KW |
249 | |
250 | case ACTION_SUSPEND: | |
251 | rule->options.suspend.tag = | |
252 | g_strdup(qemu_opt_get(opts, "tag")); | |
253 | break; | |
8b9b0cc2 KW |
254 | }; |
255 | ||
256 | /* Add the rule */ | |
36109bff | 257 | qemu_mutex_lock(&s->lock); |
8b9b0cc2 | 258 | QLIST_INSERT_HEAD(&s->rules[event], rule, next); |
36109bff | 259 | qemu_mutex_unlock(&s->lock); |
8b9b0cc2 KW |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
36109bff | 264 | /* Called with lock held or from .bdrv_close */ |
9e35542b KW |
265 | static void remove_rule(BlkdebugRule *rule) |
266 | { | |
267 | switch (rule->action) { | |
268 | case ACTION_INJECT_ERROR: | |
269 | case ACTION_SET_STATE: | |
270 | break; | |
3c90c65d KW |
271 | case ACTION_SUSPEND: |
272 | g_free(rule->options.suspend.tag); | |
273 | break; | |
9e35542b KW |
274 | } |
275 | ||
276 | QLIST_REMOVE(rule, next); | |
277 | g_free(rule); | |
278 | } | |
279 | ||
89f2b21e HR |
280 | static int read_config(BDRVBlkdebugState *s, const char *filename, |
281 | QDict *options, Error **errp) | |
8b9b0cc2 | 282 | { |
85a040e5 | 283 | FILE *f = NULL; |
8b9b0cc2 KW |
284 | int ret; |
285 | struct add_rule_data d; | |
89f2b21e | 286 | Error *local_err = NULL; |
8b9b0cc2 | 287 | |
85a040e5 HR |
288 | if (filename) { |
289 | f = fopen(filename, "r"); | |
290 | if (f == NULL) { | |
291 | error_setg_errno(errp, errno, "Could not read blkdebug config file"); | |
292 | return -errno; | |
293 | } | |
8b9b0cc2 | 294 | |
f7544edc | 295 | ret = qemu_config_parse(f, config_groups, filename, errp); |
85a040e5 | 296 | if (ret < 0) { |
85a040e5 HR |
297 | goto fail; |
298 | } | |
8b9b0cc2 KW |
299 | } |
300 | ||
f766e6dc | 301 | if (!qemu_config_parse_qdict(options, config_groups, errp)) { |
89f2b21e HR |
302 | ret = -EINVAL; |
303 | goto fail; | |
304 | } | |
305 | ||
8b9b0cc2 KW |
306 | d.s = s; |
307 | d.action = ACTION_INJECT_ERROR; | |
8809cfc3 | 308 | qemu_opts_foreach(&inject_error_opts, add_rule, &d, &local_err); |
d4362d64 SH |
309 | if (local_err) { |
310 | error_propagate(errp, local_err); | |
311 | ret = -EINVAL; | |
312 | goto fail; | |
313 | } | |
8b9b0cc2 KW |
314 | |
315 | d.action = ACTION_SET_STATE; | |
8809cfc3 | 316 | qemu_opts_foreach(&set_state_opts, add_rule, &d, &local_err); |
d4362d64 SH |
317 | if (local_err) { |
318 | error_propagate(errp, local_err); | |
319 | ret = -EINVAL; | |
320 | goto fail; | |
321 | } | |
8b9b0cc2 KW |
322 | |
323 | ret = 0; | |
324 | fail: | |
698f0d52 KW |
325 | qemu_opts_reset(&inject_error_opts); |
326 | qemu_opts_reset(&set_state_opts); | |
85a040e5 HR |
327 | if (f) { |
328 | fclose(f); | |
329 | } | |
8b9b0cc2 KW |
330 | return ret; |
331 | } | |
332 | ||
333 | /* Valid blkdebug filenames look like blkdebug:path/to/config:path/to/image */ | |
f4681212 KW |
334 | static void blkdebug_parse_filename(const char *filename, QDict *options, |
335 | Error **errp) | |
6a143727 | 336 | { |
f4681212 | 337 | const char *c; |
6a143727 | 338 | |
8b9b0cc2 | 339 | /* Parse the blkdebug: prefix */ |
f4681212 | 340 | if (!strstart(filename, "blkdebug:", &filename)) { |
d4881b9b HR |
341 | /* There was no prefix; therefore, all options have to be already |
342 | present in the QDict (except for the filename) */ | |
46f5ac20 | 343 | qdict_put_str(options, "x-image", filename); |
f4681212 | 344 | return; |
6a143727 | 345 | } |
6a143727 | 346 | |
f4681212 | 347 | /* Parse config file path */ |
8b9b0cc2 KW |
348 | c = strchr(filename, ':'); |
349 | if (c == NULL) { | |
f4681212 KW |
350 | error_setg(errp, "blkdebug requires both config file and image path"); |
351 | return; | |
8b9b0cc2 KW |
352 | } |
353 | ||
f4681212 KW |
354 | if (c != filename) { |
355 | QString *config_path; | |
ba891d68 | 356 | config_path = qstring_from_substr(filename, 0, c - filename); |
f4681212 | 357 | qdict_put(options, "config", config_path); |
8b9b0cc2 | 358 | } |
f4681212 KW |
359 | |
360 | /* TODO Allow multi-level nesting and set file.filename here */ | |
8b9b0cc2 | 361 | filename = c + 1; |
46f5ac20 | 362 | qdict_put_str(options, "x-image", filename); |
f4681212 KW |
363 | } |
364 | ||
69c6449f HR |
365 | static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options, |
366 | const char *prefix, Error **errp) | |
367 | { | |
368 | int ret = 0; | |
369 | QDict *subqdict = NULL; | |
370 | QObject *crumpled_subqdict = NULL; | |
371 | Visitor *v = NULL; | |
372 | BlockPermissionList *perm_list = NULL, *element; | |
69c6449f HR |
373 | |
374 | *dest = 0; | |
375 | ||
376 | qdict_extract_subqdict(options, &subqdict, prefix); | |
377 | if (!qdict_size(subqdict)) { | |
378 | goto out; | |
379 | } | |
380 | ||
381 | crumpled_subqdict = qdict_crumple(subqdict, errp); | |
382 | if (!crumpled_subqdict) { | |
383 | ret = -EINVAL; | |
384 | goto out; | |
385 | } | |
386 | ||
387 | v = qobject_input_visitor_new(crumpled_subqdict); | |
af175e85 | 388 | if (!visit_type_BlockPermissionList(v, NULL, &perm_list, errp)) { |
69c6449f HR |
389 | ret = -EINVAL; |
390 | goto out; | |
391 | } | |
392 | ||
393 | for (element = perm_list; element; element = element->next) { | |
394 | *dest |= bdrv_qapi_perm_to_blk_perm(element->value); | |
395 | } | |
396 | ||
397 | out: | |
398 | qapi_free_BlockPermissionList(perm_list); | |
399 | visit_free(v); | |
400 | qobject_unref(subqdict); | |
401 | qobject_unref(crumpled_subqdict); | |
402 | return ret; | |
403 | } | |
404 | ||
405 | static int blkdebug_parse_perms(BDRVBlkdebugState *s, QDict *options, | |
406 | Error **errp) | |
407 | { | |
408 | int ret; | |
409 | ||
410 | ret = blkdebug_parse_perm_list(&s->take_child_perms, options, | |
411 | "take-child-perms.", errp); | |
412 | if (ret < 0) { | |
413 | return ret; | |
414 | } | |
415 | ||
416 | ret = blkdebug_parse_perm_list(&s->unshare_child_perms, options, | |
417 | "unshare-child-perms.", errp); | |
418 | if (ret < 0) { | |
419 | return ret; | |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
f4681212 KW |
425 | static QemuOptsList runtime_opts = { |
426 | .name = "blkdebug", | |
427 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
428 | .desc = { | |
429 | { | |
430 | .name = "config", | |
431 | .type = QEMU_OPT_STRING, | |
432 | .help = "Path to the configuration file", | |
433 | }, | |
434 | { | |
435 | .name = "x-image", | |
436 | .type = QEMU_OPT_STRING, | |
437 | .help = "[internal use only, will be removed]", | |
438 | }, | |
b35ee7fb KW |
439 | { |
440 | .name = "align", | |
441 | .type = QEMU_OPT_SIZE, | |
442 | .help = "Required alignment in bytes", | |
443 | }, | |
430b26a8 EB |
444 | { |
445 | .name = "max-transfer", | |
446 | .type = QEMU_OPT_SIZE, | |
447 | .help = "Maximum transfer size in bytes", | |
448 | }, | |
449 | { | |
450 | .name = "opt-write-zero", | |
451 | .type = QEMU_OPT_SIZE, | |
452 | .help = "Optimum write zero alignment in bytes", | |
453 | }, | |
454 | { | |
455 | .name = "max-write-zero", | |
456 | .type = QEMU_OPT_SIZE, | |
457 | .help = "Maximum write zero size in bytes", | |
458 | }, | |
459 | { | |
460 | .name = "opt-discard", | |
461 | .type = QEMU_OPT_SIZE, | |
462 | .help = "Optimum discard alignment in bytes", | |
463 | }, | |
464 | { | |
465 | .name = "max-discard", | |
466 | .type = QEMU_OPT_SIZE, | |
467 | .help = "Maximum discard size in bytes", | |
468 | }, | |
f4681212 KW |
469 | { /* end of list */ } |
470 | }, | |
471 | }; | |
472 | ||
015a1036 HR |
473 | static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, |
474 | Error **errp) | |
f4681212 KW |
475 | { |
476 | BDRVBlkdebugState *s = bs->opaque; | |
477 | QemuOpts *opts; | |
f4681212 | 478 | int ret; |
430b26a8 | 479 | uint64_t align; |
f4681212 | 480 | |
36109bff | 481 | qemu_mutex_init(&s->lock); |
87ea75d5 | 482 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
af175e85 | 483 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
f4681212 | 484 | ret = -EINVAL; |
eaf944a4 | 485 | goto out; |
f4681212 KW |
486 | } |
487 | ||
89f2b21e | 488 | /* Read rules from config file or command line options */ |
036990d7 HR |
489 | s->config_file = g_strdup(qemu_opt_get(opts, "config")); |
490 | ret = read_config(s, s->config_file, options, errp); | |
85a040e5 | 491 | if (ret) { |
eaf944a4 | 492 | goto out; |
f4681212 | 493 | } |
8b9b0cc2 | 494 | |
8db520ce | 495 | /* Set initial state */ |
571cd43e | 496 | s->state = 1; |
8db520ce | 497 | |
69c6449f HR |
498 | /* Parse permissions modifiers before opening the image file */ |
499 | ret = blkdebug_parse_perms(s, options, errp); | |
500 | if (ret < 0) { | |
501 | goto out; | |
502 | } | |
503 | ||
6b826af7 | 504 | /* Open the image file */ |
83930780 VSO |
505 | ret = bdrv_open_file_child(qemu_opt_get(opts, "x-image"), options, "image", |
506 | bs, errp); | |
507 | if (ret < 0) { | |
eaf944a4 | 508 | goto out; |
8b9b0cc2 KW |
509 | } |
510 | ||
228345bf HR |
511 | bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED | |
512 | (BDRV_REQ_FUA & bs->file->bs->supported_write_flags); | |
513 | bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED | | |
80f5c33f | 514 | ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & |
228345bf | 515 | bs->file->bs->supported_zero_flags); |
3dc834f8 | 516 | ret = -EINVAL; |
63188c24 | 517 | |
430b26a8 | 518 | /* Set alignment overrides */ |
3dc834f8 EB |
519 | s->align = qemu_opt_get_size(opts, "align", 0); |
520 | if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) { | |
521 | error_setg(errp, "Cannot meet constraints with align %" PRIu64, | |
522 | s->align); | |
de234897 | 523 | goto out; |
b35ee7fb | 524 | } |
430b26a8 EB |
525 | align = MAX(s->align, bs->file->bs->bl.request_alignment); |
526 | ||
527 | s->max_transfer = qemu_opt_get_size(opts, "max-transfer", 0); | |
528 | if (s->max_transfer && | |
529 | (s->max_transfer >= INT_MAX || | |
530 | !QEMU_IS_ALIGNED(s->max_transfer, align))) { | |
531 | error_setg(errp, "Cannot meet constraints with max-transfer %" PRIu64, | |
532 | s->max_transfer); | |
533 | goto out; | |
534 | } | |
535 | ||
536 | s->opt_write_zero = qemu_opt_get_size(opts, "opt-write-zero", 0); | |
537 | if (s->opt_write_zero && | |
538 | (s->opt_write_zero >= INT_MAX || | |
539 | !QEMU_IS_ALIGNED(s->opt_write_zero, align))) { | |
540 | error_setg(errp, "Cannot meet constraints with opt-write-zero %" PRIu64, | |
541 | s->opt_write_zero); | |
542 | goto out; | |
543 | } | |
544 | ||
545 | s->max_write_zero = qemu_opt_get_size(opts, "max-write-zero", 0); | |
546 | if (s->max_write_zero && | |
547 | (s->max_write_zero >= INT_MAX || | |
548 | !QEMU_IS_ALIGNED(s->max_write_zero, | |
549 | MAX(s->opt_write_zero, align)))) { | |
550 | error_setg(errp, "Cannot meet constraints with max-write-zero %" PRIu64, | |
551 | s->max_write_zero); | |
552 | goto out; | |
553 | } | |
554 | ||
555 | s->opt_discard = qemu_opt_get_size(opts, "opt-discard", 0); | |
556 | if (s->opt_discard && | |
557 | (s->opt_discard >= INT_MAX || | |
558 | !QEMU_IS_ALIGNED(s->opt_discard, align))) { | |
559 | error_setg(errp, "Cannot meet constraints with opt-discard %" PRIu64, | |
560 | s->opt_discard); | |
561 | goto out; | |
562 | } | |
563 | ||
564 | s->max_discard = qemu_opt_get_size(opts, "max-discard", 0); | |
565 | if (s->max_discard && | |
566 | (s->max_discard >= INT_MAX || | |
567 | !QEMU_IS_ALIGNED(s->max_discard, | |
568 | MAX(s->opt_discard, align)))) { | |
569 | error_setg(errp, "Cannot meet constraints with max-discard %" PRIu64, | |
570 | s->max_discard); | |
571 | goto out; | |
572 | } | |
b35ee7fb | 573 | |
f8cec157 HR |
574 | bdrv_debug_event(bs, BLKDBG_NONE); |
575 | ||
f4681212 | 576 | ret = 0; |
eaf944a4 | 577 | out: |
036990d7 | 578 | if (ret < 0) { |
36109bff | 579 | qemu_mutex_destroy(&s->lock); |
036990d7 HR |
580 | g_free(s->config_file); |
581 | } | |
f4681212 KW |
582 | qemu_opts_del(opts); |
583 | return ret; | |
6a143727 KW |
584 | } |
585 | ||
2f1fabdf PB |
586 | static int coroutine_fn rule_check(BlockDriverState *bs, uint64_t offset, |
587 | uint64_t bytes, BlkdebugIOType iotype) | |
b9f66d96 KW |
588 | { |
589 | BDRVBlkdebugState *s = bs->opaque; | |
d157ed5f EB |
590 | BlkdebugRule *rule = NULL; |
591 | int error; | |
592 | bool immediately; | |
593 | ||
36109bff | 594 | qemu_mutex_lock(&s->lock); |
d157ed5f EB |
595 | QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { |
596 | uint64_t inject_offset = rule->options.inject.offset; | |
597 | ||
16789db3 HR |
598 | if ((inject_offset == -1 || |
599 | (bytes && inject_offset >= offset && | |
600 | inject_offset < offset + bytes)) && | |
601 | (rule->options.inject.iotype_mask & (1ull << iotype))) | |
d157ed5f EB |
602 | { |
603 | break; | |
604 | } | |
605 | } | |
606 | ||
607 | if (!rule || !rule->options.inject.error) { | |
36109bff | 608 | qemu_mutex_unlock(&s->lock); |
d157ed5f EB |
609 | return 0; |
610 | } | |
611 | ||
612 | immediately = rule->options.inject.immediately; | |
613 | error = rule->options.inject.error; | |
b9f66d96 | 614 | |
571cd43e | 615 | if (rule->options.inject.once) { |
a069e2f1 JS |
616 | QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next); |
617 | remove_rule(rule); | |
b9f66d96 KW |
618 | } |
619 | ||
36109bff | 620 | qemu_mutex_unlock(&s->lock); |
7c3a9985 | 621 | if (!immediately) { |
e5c67ab5 | 622 | aio_co_schedule(qemu_get_current_aio_context(), qemu_coroutine_self()); |
7c3a9985 | 623 | qemu_coroutine_yield(); |
b9f66d96 KW |
624 | } |
625 | ||
7c3a9985 | 626 | return -error; |
b9f66d96 KW |
627 | } |
628 | ||
b9b10c35 | 629 | static int coroutine_fn GRAPH_RDLOCK |
f7ef38dd VSO |
630 | blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
631 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
6a143727 | 632 | { |
d157ed5f | 633 | int err; |
e4780db4 | 634 | |
e0ef4395 EB |
635 | /* Sanity check block layer guarantees */ |
636 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
637 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); | |
638 | if (bs->bl.max_transfer) { | |
639 | assert(bytes <= bs->bl.max_transfer); | |
640 | } | |
641 | ||
16789db3 | 642 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_READ); |
d157ed5f EB |
643 | if (err) { |
644 | return err; | |
b9f66d96 KW |
645 | } |
646 | ||
7c3a9985 | 647 | return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags); |
6a143727 KW |
648 | } |
649 | ||
b9b10c35 | 650 | static int coroutine_fn GRAPH_RDLOCK |
e75abeda VSO |
651 | blkdebug_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
652 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
6a143727 | 653 | { |
d157ed5f | 654 | int err; |
e4780db4 | 655 | |
e0ef4395 EB |
656 | /* Sanity check block layer guarantees */ |
657 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
658 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); | |
659 | if (bs->bl.max_transfer) { | |
660 | assert(bytes <= bs->bl.max_transfer); | |
661 | } | |
662 | ||
16789db3 | 663 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_WRITE); |
d157ed5f EB |
664 | if (err) { |
665 | return err; | |
b9f66d96 KW |
666 | } |
667 | ||
7c3a9985 | 668 | return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags); |
6a143727 KW |
669 | } |
670 | ||
88095349 | 671 | static int GRAPH_RDLOCK coroutine_fn blkdebug_co_flush(BlockDriverState *bs) |
9e52c53b | 672 | { |
16789db3 | 673 | int err = rule_check(bs, 0, 0, BLKDEBUG_IO_TYPE_FLUSH); |
9e52c53b | 674 | |
d157ed5f EB |
675 | if (err) { |
676 | return err; | |
9e52c53b PB |
677 | } |
678 | ||
7c3a9985 | 679 | return bdrv_co_flush(bs->file->bs); |
9e52c53b PB |
680 | } |
681 | ||
abaf8b75 KW |
682 | static int coroutine_fn GRAPH_RDLOCK |
683 | blkdebug_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, | |
684 | BdrvRequestFlags flags) | |
63188c24 EB |
685 | { |
686 | uint32_t align = MAX(bs->bl.request_alignment, | |
687 | bs->bl.pwrite_zeroes_alignment); | |
688 | int err; | |
689 | ||
690 | /* Only pass through requests that are larger than requested | |
691 | * preferred alignment (so that we test the fallback to writes on | |
692 | * unaligned portions), and check that the block layer never hands | |
693 | * us anything unaligned that crosses an alignment boundary. */ | |
f5a5ca79 | 694 | if (bytes < align) { |
63188c24 | 695 | assert(QEMU_IS_ALIGNED(offset, align) || |
f5a5ca79 | 696 | QEMU_IS_ALIGNED(offset + bytes, align) || |
63188c24 | 697 | DIV_ROUND_UP(offset, align) == |
f5a5ca79 | 698 | DIV_ROUND_UP(offset + bytes, align)); |
63188c24 EB |
699 | return -ENOTSUP; |
700 | } | |
701 | assert(QEMU_IS_ALIGNED(offset, align)); | |
f5a5ca79 | 702 | assert(QEMU_IS_ALIGNED(bytes, align)); |
63188c24 | 703 | if (bs->bl.max_pwrite_zeroes) { |
f5a5ca79 | 704 | assert(bytes <= bs->bl.max_pwrite_zeroes); |
63188c24 EB |
705 | } |
706 | ||
16789db3 | 707 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_WRITE_ZEROES); |
63188c24 EB |
708 | if (err) { |
709 | return err; | |
710 | } | |
711 | ||
f5a5ca79 | 712 | return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags); |
63188c24 EB |
713 | } |
714 | ||
9a5a1c62 EGE |
715 | static int coroutine_fn GRAPH_RDLOCK |
716 | blkdebug_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes) | |
63188c24 EB |
717 | { |
718 | uint32_t align = bs->bl.pdiscard_alignment; | |
719 | int err; | |
720 | ||
721 | /* Only pass through requests that are larger than requested | |
722 | * minimum alignment, and ensure that unaligned requests do not | |
723 | * cross optimum discard boundaries. */ | |
f5a5ca79 | 724 | if (bytes < bs->bl.request_alignment) { |
63188c24 | 725 | assert(QEMU_IS_ALIGNED(offset, align) || |
f5a5ca79 | 726 | QEMU_IS_ALIGNED(offset + bytes, align) || |
63188c24 | 727 | DIV_ROUND_UP(offset, align) == |
f5a5ca79 | 728 | DIV_ROUND_UP(offset + bytes, align)); |
63188c24 EB |
729 | return -ENOTSUP; |
730 | } | |
731 | assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment)); | |
f5a5ca79 MP |
732 | assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment)); |
733 | if (align && bytes >= align) { | |
63188c24 | 734 | assert(QEMU_IS_ALIGNED(offset, align)); |
f5a5ca79 | 735 | assert(QEMU_IS_ALIGNED(bytes, align)); |
63188c24 EB |
736 | } |
737 | if (bs->bl.max_pdiscard) { | |
f5a5ca79 | 738 | assert(bytes <= bs->bl.max_pdiscard); |
63188c24 EB |
739 | } |
740 | ||
16789db3 | 741 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_DISCARD); |
63188c24 EB |
742 | if (err) { |
743 | return err; | |
744 | } | |
745 | ||
0b9fd3f4 | 746 | return bdrv_co_pdiscard(bs->file, offset, bytes); |
63188c24 | 747 | } |
3c90c65d | 748 | |
3e4d0e72 EB |
749 | static int coroutine_fn blkdebug_co_block_status(BlockDriverState *bs, |
750 | bool want_zero, | |
751 | int64_t offset, | |
752 | int64_t bytes, | |
753 | int64_t *pnum, | |
754 | int64_t *map, | |
755 | BlockDriverState **file) | |
efa6e2ed | 756 | { |
1adb0b5e HR |
757 | int err; |
758 | ||
3e4d0e72 | 759 | assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); |
1adb0b5e HR |
760 | |
761 | err = rule_check(bs, offset, bytes, BLKDEBUG_IO_TYPE_BLOCK_STATUS); | |
762 | if (err) { | |
763 | return err; | |
764 | } | |
765 | ||
549ec0d9 HR |
766 | assert(bs->file && bs->file->bs); |
767 | *pnum = bytes; | |
768 | *map = offset; | |
769 | *file = bs->file->bs; | |
770 | return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; | |
efa6e2ed EB |
771 | } |
772 | ||
6a143727 KW |
773 | static void blkdebug_close(BlockDriverState *bs) |
774 | { | |
775 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
776 | BlkdebugRule *rule, *next; |
777 | int i; | |
778 | ||
7fb1cf16 | 779 | for (i = 0; i < BLKDBG__MAX; i++) { |
8b9b0cc2 | 780 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
9e35542b | 781 | remove_rule(rule); |
8b9b0cc2 KW |
782 | } |
783 | } | |
036990d7 HR |
784 | |
785 | g_free(s->config_file); | |
36109bff | 786 | qemu_mutex_destroy(&s->lock); |
6a143727 KW |
787 | } |
788 | ||
36109bff | 789 | /* Called with lock held. */ |
3c90c65d KW |
790 | static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule) |
791 | { | |
792 | BDRVBlkdebugState *s = bs->opaque; | |
f48ff5af | 793 | BlkdebugSuspendedReq *r; |
3c90c65d | 794 | |
f48ff5af EGE |
795 | r = g_new(BlkdebugSuspendedReq, 1); |
796 | ||
797 | r->co = qemu_coroutine_self(); | |
798 | r->tag = g_strdup(rule->options.suspend.tag); | |
3c90c65d KW |
799 | |
800 | remove_rule(rule); | |
f48ff5af | 801 | QLIST_INSERT_HEAD(&s->suspended_reqs, r, next); |
3c90c65d | 802 | |
20873526 | 803 | if (!qtest_enabled()) { |
f48ff5af | 804 | printf("blkdebug: Suspended request '%s'\n", r->tag); |
20873526 | 805 | } |
3c90c65d KW |
806 | } |
807 | ||
36109bff | 808 | /* Called with lock held. */ |
51a46368 | 809 | static void process_rule(BlockDriverState *bs, struct BlkdebugRule *rule, |
4153b553 | 810 | int *action_count, int *new_state) |
8b9b0cc2 KW |
811 | { |
812 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
813 | |
814 | /* Only process rules for the current state */ | |
8f96b5be | 815 | if (rule->state && rule->state != s->state) { |
51a46368 | 816 | return; |
8b9b0cc2 KW |
817 | } |
818 | ||
819 | /* Take the action */ | |
51a46368 | 820 | action_count[rule->action]++; |
8b9b0cc2 KW |
821 | switch (rule->action) { |
822 | case ACTION_INJECT_ERROR: | |
51a46368 | 823 | if (action_count[ACTION_INJECT_ERROR] == 1) { |
571cd43e | 824 | QSIMPLEQ_INIT(&s->active_rules); |
571cd43e PB |
825 | } |
826 | QSIMPLEQ_INSERT_HEAD(&s->active_rules, rule, active_next); | |
8b9b0cc2 KW |
827 | break; |
828 | ||
829 | case ACTION_SET_STATE: | |
4153b553 | 830 | *new_state = rule->options.set_state.new_state; |
8b9b0cc2 | 831 | break; |
3c90c65d KW |
832 | |
833 | case ACTION_SUSPEND: | |
834 | suspend_request(bs, rule); | |
835 | break; | |
8b9b0cc2 KW |
836 | } |
837 | } | |
838 | ||
c834dc05 EGE |
839 | static void coroutine_fn |
840 | blkdebug_co_debug_event(BlockDriverState *bs, BlkdebugEvent event) | |
8b9b0cc2 KW |
841 | { |
842 | BDRVBlkdebugState *s = bs->opaque; | |
3c90c65d | 843 | struct BlkdebugRule *rule, *next; |
4153b553 | 844 | int new_state; |
51a46368 | 845 | int actions_count[ACTION__MAX] = { 0 }; |
8b9b0cc2 | 846 | |
7fb1cf16 | 847 | assert((int)event >= 0 && event < BLKDBG__MAX); |
8b9b0cc2 | 848 | |
36109bff EGE |
849 | WITH_QEMU_LOCK_GUARD(&s->lock) { |
850 | new_state = s->state; | |
851 | QLIST_FOREACH_SAFE(rule, &s->rules[event], next, next) { | |
852 | process_rule(bs, rule, actions_count, &new_state); | |
853 | } | |
854 | s->state = new_state; | |
8b9b0cc2 | 855 | } |
2196c341 EGE |
856 | |
857 | while (actions_count[ACTION_SUSPEND] > 0) { | |
858 | qemu_coroutine_yield(); | |
859 | actions_count[ACTION_SUSPEND]--; | |
860 | } | |
8b9b0cc2 KW |
861 | } |
862 | ||
3c90c65d KW |
863 | static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event, |
864 | const char *tag) | |
865 | { | |
866 | BDRVBlkdebugState *s = bs->opaque; | |
867 | struct BlkdebugRule *rule; | |
f9509d15 | 868 | int blkdebug_event; |
3c90c65d | 869 | |
f7abe0ec | 870 | blkdebug_event = qapi_enum_parse(&BlkdebugEvent_lookup, event, -1, NULL); |
f9509d15 | 871 | if (blkdebug_event < 0) { |
3c90c65d KW |
872 | return -ENOENT; |
873 | } | |
874 | ||
3c90c65d KW |
875 | rule = g_malloc(sizeof(*rule)); |
876 | *rule = (struct BlkdebugRule) { | |
877 | .event = blkdebug_event, | |
878 | .action = ACTION_SUSPEND, | |
879 | .state = 0, | |
880 | .options.suspend.tag = g_strdup(tag), | |
881 | }; | |
882 | ||
36109bff | 883 | qemu_mutex_lock(&s->lock); |
3c90c65d | 884 | QLIST_INSERT_HEAD(&s->rules[blkdebug_event], rule, next); |
36109bff | 885 | qemu_mutex_unlock(&s->lock); |
3c90c65d KW |
886 | |
887 | return 0; | |
888 | } | |
889 | ||
36109bff | 890 | /* Called with lock held. May temporarily release lock. */ |
69d0690c | 891 | static int resume_req_by_tag(BDRVBlkdebugState *s, const char *tag, bool all) |
3c90c65d | 892 | { |
69d0690c | 893 | BlkdebugSuspendedReq *r; |
3c90c65d | 894 | |
69d0690c EGE |
895 | retry: |
896 | /* | |
897 | * No need for _SAFE, since a different coroutine can remove another node | |
898 | * (not the current one) in this list, and when the current one is removed | |
899 | * the iteration starts back from beginning anyways. | |
900 | */ | |
901 | QLIST_FOREACH(r, &s->suspended_reqs, next) { | |
3c90c65d | 902 | if (!strcmp(r->tag, tag)) { |
f48ff5af EGE |
903 | Coroutine *co = r->co; |
904 | ||
905 | if (!qtest_enabled()) { | |
906 | printf("blkdebug: Resuming request '%s'\n", r->tag); | |
907 | } | |
908 | ||
69d0690c | 909 | QLIST_REMOVE(r, next); |
f48ff5af EGE |
910 | g_free(r->tag); |
911 | g_free(r); | |
912 | ||
36109bff | 913 | qemu_mutex_unlock(&s->lock); |
f48ff5af | 914 | qemu_coroutine_enter(co); |
36109bff | 915 | qemu_mutex_lock(&s->lock); |
f48ff5af | 916 | |
69d0690c EGE |
917 | if (all) { |
918 | goto retry; | |
919 | } | |
3c90c65d KW |
920 | return 0; |
921 | } | |
922 | } | |
923 | return -ENOENT; | |
924 | } | |
925 | ||
69d0690c EGE |
926 | static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag) |
927 | { | |
928 | BDRVBlkdebugState *s = bs->opaque; | |
36109bff | 929 | QEMU_LOCK_GUARD(&s->lock); |
69d0690c EGE |
930 | return resume_req_by_tag(s, tag, false); |
931 | } | |
932 | ||
4cc70e93 FZ |
933 | static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, |
934 | const char *tag) | |
935 | { | |
936 | BDRVBlkdebugState *s = bs->opaque; | |
4cc70e93 FZ |
937 | BlkdebugRule *rule, *next; |
938 | int i, ret = -ENOENT; | |
939 | ||
36109bff | 940 | QEMU_LOCK_GUARD(&s->lock); |
7fb1cf16 | 941 | for (i = 0; i < BLKDBG__MAX; i++) { |
4cc70e93 FZ |
942 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
943 | if (rule->action == ACTION_SUSPEND && | |
944 | !strcmp(rule->options.suspend.tag, tag)) { | |
945 | remove_rule(rule); | |
946 | ret = 0; | |
947 | } | |
948 | } | |
949 | } | |
69d0690c EGE |
950 | if (resume_req_by_tag(s, tag, true) == 0) { |
951 | ret = 0; | |
4cc70e93 FZ |
952 | } |
953 | return ret; | |
954 | } | |
3c90c65d KW |
955 | |
956 | static bool blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag) | |
957 | { | |
958 | BDRVBlkdebugState *s = bs->opaque; | |
959 | BlkdebugSuspendedReq *r; | |
960 | ||
36109bff | 961 | QEMU_LOCK_GUARD(&s->lock); |
3c90c65d KW |
962 | QLIST_FOREACH(r, &s->suspended_reqs, next) { |
963 | if (!strcmp(r->tag, tag)) { | |
964 | return true; | |
965 | } | |
966 | } | |
967 | return false; | |
968 | } | |
969 | ||
8ab8140a KW |
970 | static int64_t coroutine_fn GRAPH_RDLOCK |
971 | blkdebug_co_getlength(BlockDriverState *bs) | |
e1302255 | 972 | { |
c86422c5 | 973 | return bdrv_co_getlength(bs->file->bs); |
e1302255 PB |
974 | } |
975 | ||
998b3a1e | 976 | static void blkdebug_refresh_filename(BlockDriverState *bs) |
2c31b04c | 977 | { |
036990d7 | 978 | BDRVBlkdebugState *s = bs->opaque; |
8779441b | 979 | const QDictEntry *e; |
998b3a1e | 980 | int ret; |
2c31b04c | 981 | |
998b3a1e | 982 | if (!bs->file->bs->exact_filename[0]) { |
2c31b04c HR |
983 | return; |
984 | } | |
985 | ||
998b3a1e HR |
986 | for (e = qdict_first(bs->full_open_options); e; |
987 | e = qdict_next(bs->full_open_options, e)) | |
988 | { | |
989 | /* Real child options are under "image", but "x-image" may | |
990 | * contain a filename */ | |
991 | if (strcmp(qdict_entry_key(e), "config") && | |
992 | strcmp(qdict_entry_key(e), "image") && | |
993 | strcmp(qdict_entry_key(e), "x-image") && | |
994 | strcmp(qdict_entry_key(e), "driver")) | |
995 | { | |
996 | return; | |
de81d72d | 997 | } |
8779441b HR |
998 | } |
999 | ||
998b3a1e HR |
1000 | ret = snprintf(bs->exact_filename, sizeof(bs->exact_filename), |
1001 | "blkdebug:%s:%s", | |
1002 | s->config_file ?: "", bs->file->bs->exact_filename); | |
1003 | if (ret >= sizeof(bs->exact_filename)) { | |
1004 | /* An overflow makes the filename unusable, so do not report any */ | |
1005 | bs->exact_filename[0] = 0; | |
2c31b04c | 1006 | } |
2c31b04c HR |
1007 | } |
1008 | ||
835db3ee EB |
1009 | static void blkdebug_refresh_limits(BlockDriverState *bs, Error **errp) |
1010 | { | |
1011 | BDRVBlkdebugState *s = bs->opaque; | |
1012 | ||
1013 | if (s->align) { | |
a5b8dd2c | 1014 | bs->bl.request_alignment = s->align; |
835db3ee | 1015 | } |
430b26a8 EB |
1016 | if (s->max_transfer) { |
1017 | bs->bl.max_transfer = s->max_transfer; | |
1018 | } | |
1019 | if (s->opt_write_zero) { | |
1020 | bs->bl.pwrite_zeroes_alignment = s->opt_write_zero; | |
1021 | } | |
1022 | if (s->max_write_zero) { | |
1023 | bs->bl.max_pwrite_zeroes = s->max_write_zero; | |
1024 | } | |
1025 | if (s->opt_discard) { | |
1026 | bs->bl.pdiscard_alignment = s->opt_discard; | |
1027 | } | |
1028 | if (s->max_discard) { | |
1029 | bs->bl.max_pdiscard = s->max_discard; | |
1030 | } | |
835db3ee EB |
1031 | } |
1032 | ||
c5e8bfb7 KW |
1033 | static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, |
1034 | BlockReopenQueue *queue, Error **errp) | |
1035 | { | |
1036 | return 0; | |
1037 | } | |
1038 | ||
69c6449f | 1039 | static void blkdebug_child_perm(BlockDriverState *bs, BdrvChild *c, |
bf8e925e | 1040 | BdrvChildRole role, |
69c6449f HR |
1041 | BlockReopenQueue *reopen_queue, |
1042 | uint64_t perm, uint64_t shared, | |
1043 | uint64_t *nperm, uint64_t *nshared) | |
1044 | { | |
1045 | BDRVBlkdebugState *s = bs->opaque; | |
1046 | ||
e5d8a406 | 1047 | bdrv_default_perms(bs, c, role, reopen_queue, |
69dca43d | 1048 | perm, shared, nperm, nshared); |
69c6449f HR |
1049 | |
1050 | *nperm |= s->take_child_perms; | |
1051 | *nshared &= ~s->unshare_child_perms; | |
1052 | } | |
1053 | ||
2654267c HR |
1054 | static const char *const blkdebug_strong_runtime_opts[] = { |
1055 | "config", | |
1056 | "inject-error.", | |
1057 | "set-state.", | |
1058 | "align", | |
1059 | "max-transfer", | |
1060 | "opt-write-zero", | |
1061 | "max-write-zero", | |
1062 | "opt-discard", | |
1063 | "max-discard", | |
1064 | ||
1065 | NULL | |
1066 | }; | |
1067 | ||
6a143727 | 1068 | static BlockDriver bdrv_blkdebug = { |
f4681212 KW |
1069 | .format_name = "blkdebug", |
1070 | .protocol_name = "blkdebug", | |
1071 | .instance_size = sizeof(BDRVBlkdebugState), | |
d8e12cd3 | 1072 | .is_filter = true, |
6a143727 | 1073 | |
f4681212 KW |
1074 | .bdrv_parse_filename = blkdebug_parse_filename, |
1075 | .bdrv_file_open = blkdebug_open, | |
1076 | .bdrv_close = blkdebug_close, | |
c5e8bfb7 | 1077 | .bdrv_reopen_prepare = blkdebug_reopen_prepare, |
69c6449f | 1078 | .bdrv_child_perm = blkdebug_child_perm, |
d7010dfb | 1079 | |
c86422c5 | 1080 | .bdrv_co_getlength = blkdebug_co_getlength, |
2c31b04c | 1081 | .bdrv_refresh_filename = blkdebug_refresh_filename, |
835db3ee | 1082 | .bdrv_refresh_limits = blkdebug_refresh_limits, |
6a143727 | 1083 | |
7c3a9985 KW |
1084 | .bdrv_co_preadv = blkdebug_co_preadv, |
1085 | .bdrv_co_pwritev = blkdebug_co_pwritev, | |
1086 | .bdrv_co_flush_to_disk = blkdebug_co_flush, | |
63188c24 EB |
1087 | .bdrv_co_pwrite_zeroes = blkdebug_co_pwrite_zeroes, |
1088 | .bdrv_co_pdiscard = blkdebug_co_pdiscard, | |
3e4d0e72 | 1089 | .bdrv_co_block_status = blkdebug_co_block_status, |
8b9b0cc2 | 1090 | |
c834dc05 | 1091 | .bdrv_co_debug_event = blkdebug_co_debug_event, |
3c90c65d | 1092 | .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, |
4cc70e93 FZ |
1093 | .bdrv_debug_remove_breakpoint |
1094 | = blkdebug_debug_remove_breakpoint, | |
3c90c65d KW |
1095 | .bdrv_debug_resume = blkdebug_debug_resume, |
1096 | .bdrv_debug_is_suspended = blkdebug_debug_is_suspended, | |
2654267c HR |
1097 | |
1098 | .strong_runtime_opts = blkdebug_strong_runtime_opts, | |
6a143727 KW |
1099 | }; |
1100 | ||
1101 | static void bdrv_blkdebug_init(void) | |
1102 | { | |
1103 | bdrv_register(&bdrv_blkdebug); | |
1104 | } | |
1105 | ||
1106 | block_init(bdrv_blkdebug_init); |