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Commit | Line | Data |
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6a143727 KW |
1 | /* |
2 | * Block protocol for I/O error injection | |
3 | * | |
4 | * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
80c71a24 | 25 | #include "qemu/osdep.h" |
da34e65c | 26 | #include "qapi/error.h" |
f348b6d1 | 27 | #include "qemu/cutils.h" |
1de7afc9 | 28 | #include "qemu/config-file.h" |
737e150e | 29 | #include "block/block_int.h" |
1de7afc9 | 30 | #include "qemu/module.h" |
2c31b04c HR |
31 | #include "qapi/qmp/qbool.h" |
32 | #include "qapi/qmp/qdict.h" | |
33 | #include "qapi/qmp/qint.h" | |
34 | #include "qapi/qmp/qstring.h" | |
20873526 | 35 | #include "sysemu/qtest.h" |
6a143727 KW |
36 | |
37 | typedef struct BDRVBlkdebugState { | |
571cd43e | 38 | int state; |
8f96b5be | 39 | int new_state; |
3c90c65d | 40 | |
7fb1cf16 | 41 | QLIST_HEAD(, BlkdebugRule) rules[BLKDBG__MAX]; |
571cd43e | 42 | QSIMPLEQ_HEAD(, BlkdebugRule) active_rules; |
3c90c65d | 43 | QLIST_HEAD(, BlkdebugSuspendedReq) suspended_reqs; |
6a143727 KW |
44 | } BDRVBlkdebugState; |
45 | ||
b9f66d96 | 46 | typedef struct BlkdebugAIOCB { |
7c84b1b8 | 47 | BlockAIOCB common; |
b9f66d96 KW |
48 | QEMUBH *bh; |
49 | int ret; | |
50 | } BlkdebugAIOCB; | |
51 | ||
3c90c65d KW |
52 | typedef struct BlkdebugSuspendedReq { |
53 | Coroutine *co; | |
54 | char *tag; | |
55 | QLIST_ENTRY(BlkdebugSuspendedReq) next; | |
56 | } BlkdebugSuspendedReq; | |
57 | ||
d7331bed | 58 | static const AIOCBInfo blkdebug_aiocb_info = { |
4c781717 | 59 | .aiocb_size = sizeof(BlkdebugAIOCB), |
b9f66d96 KW |
60 | }; |
61 | ||
8b9b0cc2 KW |
62 | enum { |
63 | ACTION_INJECT_ERROR, | |
64 | ACTION_SET_STATE, | |
3c90c65d | 65 | ACTION_SUSPEND, |
8b9b0cc2 KW |
66 | }; |
67 | ||
68 | typedef struct BlkdebugRule { | |
a31939e6 | 69 | BlkdebugEvent event; |
8b9b0cc2 KW |
70 | int action; |
71 | int state; | |
72 | union { | |
73 | struct { | |
74 | int error; | |
75 | int immediately; | |
76 | int once; | |
e4780db4 | 77 | int64_t sector; |
8b9b0cc2 KW |
78 | } inject; |
79 | struct { | |
80 | int new_state; | |
81 | } set_state; | |
3c90c65d KW |
82 | struct { |
83 | char *tag; | |
84 | } suspend; | |
8b9b0cc2 KW |
85 | } options; |
86 | QLIST_ENTRY(BlkdebugRule) next; | |
571cd43e | 87 | QSIMPLEQ_ENTRY(BlkdebugRule) active_next; |
8b9b0cc2 KW |
88 | } BlkdebugRule; |
89 | ||
90 | static QemuOptsList inject_error_opts = { | |
91 | .name = "inject-error", | |
92 | .head = QTAILQ_HEAD_INITIALIZER(inject_error_opts.head), | |
93 | .desc = { | |
94 | { | |
95 | .name = "event", | |
96 | .type = QEMU_OPT_STRING, | |
97 | }, | |
98 | { | |
99 | .name = "state", | |
100 | .type = QEMU_OPT_NUMBER, | |
101 | }, | |
102 | { | |
103 | .name = "errno", | |
104 | .type = QEMU_OPT_NUMBER, | |
105 | }, | |
e4780db4 PB |
106 | { |
107 | .name = "sector", | |
108 | .type = QEMU_OPT_NUMBER, | |
109 | }, | |
8b9b0cc2 KW |
110 | { |
111 | .name = "once", | |
112 | .type = QEMU_OPT_BOOL, | |
113 | }, | |
114 | { | |
115 | .name = "immediately", | |
116 | .type = QEMU_OPT_BOOL, | |
117 | }, | |
118 | { /* end of list */ } | |
119 | }, | |
120 | }; | |
121 | ||
122 | static QemuOptsList set_state_opts = { | |
123 | .name = "set-state", | |
327cdad4 | 124 | .head = QTAILQ_HEAD_INITIALIZER(set_state_opts.head), |
8b9b0cc2 KW |
125 | .desc = { |
126 | { | |
127 | .name = "event", | |
128 | .type = QEMU_OPT_STRING, | |
129 | }, | |
130 | { | |
131 | .name = "state", | |
132 | .type = QEMU_OPT_NUMBER, | |
133 | }, | |
134 | { | |
135 | .name = "new_state", | |
136 | .type = QEMU_OPT_NUMBER, | |
137 | }, | |
138 | { /* end of list */ } | |
139 | }, | |
140 | }; | |
141 | ||
142 | static QemuOptsList *config_groups[] = { | |
143 | &inject_error_opts, | |
144 | &set_state_opts, | |
145 | NULL | |
146 | }; | |
147 | ||
a31939e6 | 148 | static int get_event_by_name(const char *name, BlkdebugEvent *event) |
8b9b0cc2 KW |
149 | { |
150 | int i; | |
151 | ||
7fb1cf16 | 152 | for (i = 0; i < BLKDBG__MAX; i++) { |
a31939e6 | 153 | if (!strcmp(BlkdebugEvent_lookup[i], name)) { |
8b9b0cc2 KW |
154 | *event = i; |
155 | return 0; | |
156 | } | |
157 | } | |
158 | ||
159 | return -1; | |
160 | } | |
161 | ||
162 | struct add_rule_data { | |
163 | BDRVBlkdebugState *s; | |
164 | int action; | |
165 | }; | |
166 | ||
28d0de7a | 167 | static int add_rule(void *opaque, QemuOpts *opts, Error **errp) |
8b9b0cc2 KW |
168 | { |
169 | struct add_rule_data *d = opaque; | |
170 | BDRVBlkdebugState *s = d->s; | |
171 | const char* event_name; | |
a31939e6 | 172 | BlkdebugEvent event; |
8b9b0cc2 KW |
173 | struct BlkdebugRule *rule; |
174 | ||
175 | /* Find the right event for the rule */ | |
176 | event_name = qemu_opt_get(opts, "event"); | |
d4362d64 | 177 | if (!event_name) { |
8809cfc3 | 178 | error_setg(errp, "Missing event name for rule"); |
d4362d64 SH |
179 | return -1; |
180 | } else if (get_event_by_name(event_name, &event) < 0) { | |
8809cfc3 | 181 | error_setg(errp, "Invalid event name \"%s\"", event_name); |
8b9b0cc2 KW |
182 | return -1; |
183 | } | |
184 | ||
185 | /* Set attributes common for all actions */ | |
7267c094 | 186 | rule = g_malloc0(sizeof(*rule)); |
8b9b0cc2 KW |
187 | *rule = (struct BlkdebugRule) { |
188 | .event = event, | |
189 | .action = d->action, | |
190 | .state = qemu_opt_get_number(opts, "state", 0), | |
191 | }; | |
192 | ||
193 | /* Parse action-specific options */ | |
194 | switch (d->action) { | |
195 | case ACTION_INJECT_ERROR: | |
196 | rule->options.inject.error = qemu_opt_get_number(opts, "errno", EIO); | |
197 | rule->options.inject.once = qemu_opt_get_bool(opts, "once", 0); | |
198 | rule->options.inject.immediately = | |
199 | qemu_opt_get_bool(opts, "immediately", 0); | |
e4780db4 | 200 | rule->options.inject.sector = qemu_opt_get_number(opts, "sector", -1); |
8b9b0cc2 KW |
201 | break; |
202 | ||
203 | case ACTION_SET_STATE: | |
204 | rule->options.set_state.new_state = | |
205 | qemu_opt_get_number(opts, "new_state", 0); | |
206 | break; | |
3c90c65d KW |
207 | |
208 | case ACTION_SUSPEND: | |
209 | rule->options.suspend.tag = | |
210 | g_strdup(qemu_opt_get(opts, "tag")); | |
211 | break; | |
8b9b0cc2 KW |
212 | }; |
213 | ||
214 | /* Add the rule */ | |
215 | QLIST_INSERT_HEAD(&s->rules[event], rule, next); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
9e35542b KW |
220 | static void remove_rule(BlkdebugRule *rule) |
221 | { | |
222 | switch (rule->action) { | |
223 | case ACTION_INJECT_ERROR: | |
224 | case ACTION_SET_STATE: | |
225 | break; | |
3c90c65d KW |
226 | case ACTION_SUSPEND: |
227 | g_free(rule->options.suspend.tag); | |
228 | break; | |
9e35542b KW |
229 | } |
230 | ||
231 | QLIST_REMOVE(rule, next); | |
232 | g_free(rule); | |
233 | } | |
234 | ||
89f2b21e HR |
235 | static int read_config(BDRVBlkdebugState *s, const char *filename, |
236 | QDict *options, Error **errp) | |
8b9b0cc2 | 237 | { |
85a040e5 | 238 | FILE *f = NULL; |
8b9b0cc2 KW |
239 | int ret; |
240 | struct add_rule_data d; | |
89f2b21e | 241 | Error *local_err = NULL; |
8b9b0cc2 | 242 | |
85a040e5 HR |
243 | if (filename) { |
244 | f = fopen(filename, "r"); | |
245 | if (f == NULL) { | |
246 | error_setg_errno(errp, errno, "Could not read blkdebug config file"); | |
247 | return -errno; | |
248 | } | |
8b9b0cc2 | 249 | |
85a040e5 HR |
250 | ret = qemu_config_parse(f, config_groups, filename); |
251 | if (ret < 0) { | |
252 | error_setg(errp, "Could not parse blkdebug config file"); | |
253 | ret = -EINVAL; | |
254 | goto fail; | |
255 | } | |
8b9b0cc2 KW |
256 | } |
257 | ||
89f2b21e | 258 | qemu_config_parse_qdict(options, config_groups, &local_err); |
84d18f06 | 259 | if (local_err) { |
89f2b21e HR |
260 | error_propagate(errp, local_err); |
261 | ret = -EINVAL; | |
262 | goto fail; | |
263 | } | |
264 | ||
8b9b0cc2 KW |
265 | d.s = s; |
266 | d.action = ACTION_INJECT_ERROR; | |
8809cfc3 | 267 | qemu_opts_foreach(&inject_error_opts, add_rule, &d, &local_err); |
d4362d64 SH |
268 | if (local_err) { |
269 | error_propagate(errp, local_err); | |
270 | ret = -EINVAL; | |
271 | goto fail; | |
272 | } | |
8b9b0cc2 KW |
273 | |
274 | d.action = ACTION_SET_STATE; | |
8809cfc3 | 275 | qemu_opts_foreach(&set_state_opts, add_rule, &d, &local_err); |
d4362d64 SH |
276 | if (local_err) { |
277 | error_propagate(errp, local_err); | |
278 | ret = -EINVAL; | |
279 | goto fail; | |
280 | } | |
8b9b0cc2 KW |
281 | |
282 | ret = 0; | |
283 | fail: | |
698f0d52 KW |
284 | qemu_opts_reset(&inject_error_opts); |
285 | qemu_opts_reset(&set_state_opts); | |
85a040e5 HR |
286 | if (f) { |
287 | fclose(f); | |
288 | } | |
8b9b0cc2 KW |
289 | return ret; |
290 | } | |
291 | ||
292 | /* Valid blkdebug filenames look like blkdebug:path/to/config:path/to/image */ | |
f4681212 KW |
293 | static void blkdebug_parse_filename(const char *filename, QDict *options, |
294 | Error **errp) | |
6a143727 | 295 | { |
f4681212 | 296 | const char *c; |
6a143727 | 297 | |
8b9b0cc2 | 298 | /* Parse the blkdebug: prefix */ |
f4681212 | 299 | if (!strstart(filename, "blkdebug:", &filename)) { |
d4881b9b HR |
300 | /* There was no prefix; therefore, all options have to be already |
301 | present in the QDict (except for the filename) */ | |
302 | qdict_put(options, "x-image", qstring_from_str(filename)); | |
f4681212 | 303 | return; |
6a143727 | 304 | } |
6a143727 | 305 | |
f4681212 | 306 | /* Parse config file path */ |
8b9b0cc2 KW |
307 | c = strchr(filename, ':'); |
308 | if (c == NULL) { | |
f4681212 KW |
309 | error_setg(errp, "blkdebug requires both config file and image path"); |
310 | return; | |
8b9b0cc2 KW |
311 | } |
312 | ||
f4681212 KW |
313 | if (c != filename) { |
314 | QString *config_path; | |
315 | config_path = qstring_from_substr(filename, 0, c - filename - 1); | |
316 | qdict_put(options, "config", config_path); | |
8b9b0cc2 | 317 | } |
f4681212 KW |
318 | |
319 | /* TODO Allow multi-level nesting and set file.filename here */ | |
8b9b0cc2 | 320 | filename = c + 1; |
f4681212 KW |
321 | qdict_put(options, "x-image", qstring_from_str(filename)); |
322 | } | |
323 | ||
324 | static QemuOptsList runtime_opts = { | |
325 | .name = "blkdebug", | |
326 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
327 | .desc = { | |
328 | { | |
329 | .name = "config", | |
330 | .type = QEMU_OPT_STRING, | |
331 | .help = "Path to the configuration file", | |
332 | }, | |
333 | { | |
334 | .name = "x-image", | |
335 | .type = QEMU_OPT_STRING, | |
336 | .help = "[internal use only, will be removed]", | |
337 | }, | |
b35ee7fb KW |
338 | { |
339 | .name = "align", | |
340 | .type = QEMU_OPT_SIZE, | |
341 | .help = "Required alignment in bytes", | |
342 | }, | |
f4681212 KW |
343 | { /* end of list */ } |
344 | }, | |
345 | }; | |
346 | ||
015a1036 HR |
347 | static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, |
348 | Error **errp) | |
f4681212 KW |
349 | { |
350 | BDRVBlkdebugState *s = bs->opaque; | |
351 | QemuOpts *opts; | |
352 | Error *local_err = NULL; | |
4373593d | 353 | const char *config; |
b35ee7fb | 354 | uint64_t align; |
f4681212 KW |
355 | int ret; |
356 | ||
87ea75d5 | 357 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
f4681212 | 358 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 359 | if (local_err) { |
10ffa72f | 360 | error_propagate(errp, local_err); |
f4681212 | 361 | ret = -EINVAL; |
eaf944a4 | 362 | goto out; |
f4681212 KW |
363 | } |
364 | ||
89f2b21e | 365 | /* Read rules from config file or command line options */ |
f4681212 | 366 | config = qemu_opt_get(opts, "config"); |
89f2b21e | 367 | ret = read_config(s, config, options, errp); |
85a040e5 | 368 | if (ret) { |
eaf944a4 | 369 | goto out; |
f4681212 | 370 | } |
8b9b0cc2 | 371 | |
8db520ce | 372 | /* Set initial state */ |
571cd43e | 373 | s->state = 1; |
8db520ce | 374 | |
6b826af7 | 375 | /* Open the image file */ |
9a4f4c31 KW |
376 | bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "image", |
377 | bs, &child_file, false, &local_err); | |
378 | if (local_err) { | |
379 | ret = -EINVAL; | |
10ffa72f | 380 | error_propagate(errp, local_err); |
eaf944a4 | 381 | goto out; |
8b9b0cc2 KW |
382 | } |
383 | ||
b35ee7fb KW |
384 | /* Set request alignment */ |
385 | align = qemu_opt_get_size(opts, "align", bs->request_alignment); | |
386 | if (align > 0 && align < INT_MAX && !(align & (align - 1))) { | |
387 | bs->request_alignment = align; | |
388 | } else { | |
389 | error_setg(errp, "Invalid alignment"); | |
390 | ret = -EINVAL; | |
eaf944a4 | 391 | goto fail_unref; |
b35ee7fb KW |
392 | } |
393 | ||
f4681212 | 394 | ret = 0; |
eaf944a4 KW |
395 | goto out; |
396 | ||
397 | fail_unref: | |
9a4f4c31 | 398 | bdrv_unref_child(bs, bs->file); |
eaf944a4 | 399 | out: |
f4681212 KW |
400 | qemu_opts_del(opts); |
401 | return ret; | |
6a143727 KW |
402 | } |
403 | ||
b9f66d96 KW |
404 | static void error_callback_bh(void *opaque) |
405 | { | |
406 | struct BlkdebugAIOCB *acb = opaque; | |
407 | qemu_bh_delete(acb->bh); | |
408 | acb->common.cb(acb->common.opaque, acb->ret); | |
8007429a | 409 | qemu_aio_unref(acb); |
b9f66d96 KW |
410 | } |
411 | ||
7c84b1b8 | 412 | static BlockAIOCB *inject_error(BlockDriverState *bs, |
097310b5 | 413 | BlockCompletionFunc *cb, void *opaque, BlkdebugRule *rule) |
b9f66d96 KW |
414 | { |
415 | BDRVBlkdebugState *s = bs->opaque; | |
571cd43e | 416 | int error = rule->options.inject.error; |
b9f66d96 KW |
417 | struct BlkdebugAIOCB *acb; |
418 | QEMUBH *bh; | |
a069e2f1 | 419 | bool immediately = rule->options.inject.immediately; |
b9f66d96 | 420 | |
571cd43e | 421 | if (rule->options.inject.once) { |
a069e2f1 JS |
422 | QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next); |
423 | remove_rule(rule); | |
b9f66d96 KW |
424 | } |
425 | ||
a069e2f1 | 426 | if (immediately) { |
b9f66d96 KW |
427 | return NULL; |
428 | } | |
429 | ||
d7331bed | 430 | acb = qemu_aio_get(&blkdebug_aiocb_info, bs, cb, opaque); |
b9f66d96 KW |
431 | acb->ret = -error; |
432 | ||
7e1efdf0 | 433 | bh = aio_bh_new(bdrv_get_aio_context(bs), error_callback_bh, acb); |
b9f66d96 KW |
434 | acb->bh = bh; |
435 | qemu_bh_schedule(bh); | |
436 | ||
b666d239 | 437 | return &acb->common; |
b9f66d96 KW |
438 | } |
439 | ||
7c84b1b8 | 440 | static BlockAIOCB *blkdebug_aio_readv(BlockDriverState *bs, |
6a143727 | 441 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 442 | BlockCompletionFunc *cb, void *opaque) |
6a143727 KW |
443 | { |
444 | BDRVBlkdebugState *s = bs->opaque; | |
e4780db4 PB |
445 | BlkdebugRule *rule = NULL; |
446 | ||
447 | QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { | |
448 | if (rule->options.inject.sector == -1 || | |
449 | (rule->options.inject.sector >= sector_num && | |
450 | rule->options.inject.sector < sector_num + nb_sectors)) { | |
451 | break; | |
452 | } | |
453 | } | |
b9f66d96 | 454 | |
571cd43e PB |
455 | if (rule && rule->options.inject.error) { |
456 | return inject_error(bs, cb, opaque, rule); | |
b9f66d96 KW |
457 | } |
458 | ||
9a4f4c31 KW |
459 | return bdrv_aio_readv(bs->file->bs, sector_num, qiov, nb_sectors, |
460 | cb, opaque); | |
6a143727 KW |
461 | } |
462 | ||
7c84b1b8 | 463 | static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs, |
6a143727 | 464 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
097310b5 | 465 | BlockCompletionFunc *cb, void *opaque) |
6a143727 KW |
466 | { |
467 | BDRVBlkdebugState *s = bs->opaque; | |
e4780db4 PB |
468 | BlkdebugRule *rule = NULL; |
469 | ||
470 | QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { | |
471 | if (rule->options.inject.sector == -1 || | |
472 | (rule->options.inject.sector >= sector_num && | |
473 | rule->options.inject.sector < sector_num + nb_sectors)) { | |
474 | break; | |
475 | } | |
476 | } | |
b9f66d96 | 477 | |
571cd43e PB |
478 | if (rule && rule->options.inject.error) { |
479 | return inject_error(bs, cb, opaque, rule); | |
b9f66d96 KW |
480 | } |
481 | ||
9a4f4c31 KW |
482 | return bdrv_aio_writev(bs->file->bs, sector_num, qiov, nb_sectors, |
483 | cb, opaque); | |
6a143727 KW |
484 | } |
485 | ||
7c84b1b8 | 486 | static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs, |
097310b5 | 487 | BlockCompletionFunc *cb, void *opaque) |
9e52c53b PB |
488 | { |
489 | BDRVBlkdebugState *s = bs->opaque; | |
490 | BlkdebugRule *rule = NULL; | |
491 | ||
492 | QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { | |
493 | if (rule->options.inject.sector == -1) { | |
494 | break; | |
495 | } | |
496 | } | |
497 | ||
498 | if (rule && rule->options.inject.error) { | |
499 | return inject_error(bs, cb, opaque, rule); | |
500 | } | |
501 | ||
9a4f4c31 | 502 | return bdrv_aio_flush(bs->file->bs, cb, opaque); |
9e52c53b PB |
503 | } |
504 | ||
3c90c65d | 505 | |
6a143727 KW |
506 | static void blkdebug_close(BlockDriverState *bs) |
507 | { | |
508 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
509 | BlkdebugRule *rule, *next; |
510 | int i; | |
511 | ||
7fb1cf16 | 512 | for (i = 0; i < BLKDBG__MAX; i++) { |
8b9b0cc2 | 513 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
9e35542b | 514 | remove_rule(rule); |
8b9b0cc2 KW |
515 | } |
516 | } | |
6a143727 KW |
517 | } |
518 | ||
3c90c65d KW |
519 | static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule) |
520 | { | |
521 | BDRVBlkdebugState *s = bs->opaque; | |
522 | BlkdebugSuspendedReq r; | |
523 | ||
524 | r = (BlkdebugSuspendedReq) { | |
525 | .co = qemu_coroutine_self(), | |
526 | .tag = g_strdup(rule->options.suspend.tag), | |
527 | }; | |
528 | ||
529 | remove_rule(rule); | |
530 | QLIST_INSERT_HEAD(&s->suspended_reqs, &r, next); | |
531 | ||
20873526 MT |
532 | if (!qtest_enabled()) { |
533 | printf("blkdebug: Suspended request '%s'\n", r.tag); | |
534 | } | |
3c90c65d | 535 | qemu_coroutine_yield(); |
20873526 MT |
536 | if (!qtest_enabled()) { |
537 | printf("blkdebug: Resuming request '%s'\n", r.tag); | |
538 | } | |
3c90c65d KW |
539 | |
540 | QLIST_REMOVE(&r, next); | |
541 | g_free(r.tag); | |
542 | } | |
543 | ||
571cd43e | 544 | static bool process_rule(BlockDriverState *bs, struct BlkdebugRule *rule, |
8f96b5be | 545 | bool injected) |
8b9b0cc2 KW |
546 | { |
547 | BDRVBlkdebugState *s = bs->opaque; | |
8b9b0cc2 KW |
548 | |
549 | /* Only process rules for the current state */ | |
8f96b5be | 550 | if (rule->state && rule->state != s->state) { |
571cd43e | 551 | return injected; |
8b9b0cc2 KW |
552 | } |
553 | ||
554 | /* Take the action */ | |
555 | switch (rule->action) { | |
556 | case ACTION_INJECT_ERROR: | |
571cd43e PB |
557 | if (!injected) { |
558 | QSIMPLEQ_INIT(&s->active_rules); | |
559 | injected = true; | |
560 | } | |
561 | QSIMPLEQ_INSERT_HEAD(&s->active_rules, rule, active_next); | |
8b9b0cc2 KW |
562 | break; |
563 | ||
564 | case ACTION_SET_STATE: | |
8f96b5be | 565 | s->new_state = rule->options.set_state.new_state; |
8b9b0cc2 | 566 | break; |
3c90c65d KW |
567 | |
568 | case ACTION_SUSPEND: | |
569 | suspend_request(bs, rule); | |
570 | break; | |
8b9b0cc2 | 571 | } |
571cd43e | 572 | return injected; |
8b9b0cc2 KW |
573 | } |
574 | ||
a31939e6 | 575 | static void blkdebug_debug_event(BlockDriverState *bs, BlkdebugEvent event) |
8b9b0cc2 KW |
576 | { |
577 | BDRVBlkdebugState *s = bs->opaque; | |
3c90c65d | 578 | struct BlkdebugRule *rule, *next; |
571cd43e | 579 | bool injected; |
8b9b0cc2 | 580 | |
7fb1cf16 | 581 | assert((int)event >= 0 && event < BLKDBG__MAX); |
8b9b0cc2 | 582 | |
571cd43e | 583 | injected = false; |
8f96b5be | 584 | s->new_state = s->state; |
3c90c65d | 585 | QLIST_FOREACH_SAFE(rule, &s->rules[event], next, next) { |
8f96b5be | 586 | injected = process_rule(bs, rule, injected); |
8b9b0cc2 | 587 | } |
8f96b5be | 588 | s->state = s->new_state; |
8b9b0cc2 KW |
589 | } |
590 | ||
3c90c65d KW |
591 | static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event, |
592 | const char *tag) | |
593 | { | |
594 | BDRVBlkdebugState *s = bs->opaque; | |
595 | struct BlkdebugRule *rule; | |
a31939e6 | 596 | BlkdebugEvent blkdebug_event; |
3c90c65d KW |
597 | |
598 | if (get_event_by_name(event, &blkdebug_event) < 0) { | |
599 | return -ENOENT; | |
600 | } | |
601 | ||
602 | ||
603 | rule = g_malloc(sizeof(*rule)); | |
604 | *rule = (struct BlkdebugRule) { | |
605 | .event = blkdebug_event, | |
606 | .action = ACTION_SUSPEND, | |
607 | .state = 0, | |
608 | .options.suspend.tag = g_strdup(tag), | |
609 | }; | |
610 | ||
611 | QLIST_INSERT_HEAD(&s->rules[blkdebug_event], rule, next); | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag) | |
617 | { | |
618 | BDRVBlkdebugState *s = bs->opaque; | |
c547e564 | 619 | BlkdebugSuspendedReq *r, *next; |
3c90c65d | 620 | |
c547e564 | 621 | QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, next) { |
3c90c65d KW |
622 | if (!strcmp(r->tag, tag)) { |
623 | qemu_coroutine_enter(r->co, NULL); | |
624 | return 0; | |
625 | } | |
626 | } | |
627 | return -ENOENT; | |
628 | } | |
629 | ||
4cc70e93 FZ |
630 | static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, |
631 | const char *tag) | |
632 | { | |
633 | BDRVBlkdebugState *s = bs->opaque; | |
c547e564 | 634 | BlkdebugSuspendedReq *r, *r_next; |
4cc70e93 FZ |
635 | BlkdebugRule *rule, *next; |
636 | int i, ret = -ENOENT; | |
637 | ||
7fb1cf16 | 638 | for (i = 0; i < BLKDBG__MAX; i++) { |
4cc70e93 FZ |
639 | QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { |
640 | if (rule->action == ACTION_SUSPEND && | |
641 | !strcmp(rule->options.suspend.tag, tag)) { | |
642 | remove_rule(rule); | |
643 | ret = 0; | |
644 | } | |
645 | } | |
646 | } | |
c547e564 | 647 | QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, r_next) { |
4cc70e93 FZ |
648 | if (!strcmp(r->tag, tag)) { |
649 | qemu_coroutine_enter(r->co, NULL); | |
650 | ret = 0; | |
651 | } | |
652 | } | |
653 | return ret; | |
654 | } | |
3c90c65d KW |
655 | |
656 | static bool blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag) | |
657 | { | |
658 | BDRVBlkdebugState *s = bs->opaque; | |
659 | BlkdebugSuspendedReq *r; | |
660 | ||
661 | QLIST_FOREACH(r, &s->suspended_reqs, next) { | |
662 | if (!strcmp(r->tag, tag)) { | |
663 | return true; | |
664 | } | |
665 | } | |
666 | return false; | |
667 | } | |
668 | ||
e1302255 PB |
669 | static int64_t blkdebug_getlength(BlockDriverState *bs) |
670 | { | |
9a4f4c31 | 671 | return bdrv_getlength(bs->file->bs); |
e1302255 PB |
672 | } |
673 | ||
8eedfbd4 KW |
674 | static int blkdebug_truncate(BlockDriverState *bs, int64_t offset) |
675 | { | |
9a4f4c31 | 676 | return bdrv_truncate(bs->file->bs, offset); |
8eedfbd4 KW |
677 | } |
678 | ||
4cdd01d3 | 679 | static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options) |
2c31b04c | 680 | { |
2c31b04c | 681 | QDict *opts; |
8779441b HR |
682 | const QDictEntry *e; |
683 | bool force_json = false; | |
684 | ||
4cdd01d3 | 685 | for (e = qdict_first(options); e; e = qdict_next(options, e)) { |
8779441b | 686 | if (strcmp(qdict_entry_key(e), "config") && |
4cdd01d3 | 687 | strcmp(qdict_entry_key(e), "x-image")) |
8779441b HR |
688 | { |
689 | force_json = true; | |
690 | break; | |
691 | } | |
692 | } | |
2c31b04c | 693 | |
9a4f4c31 | 694 | if (force_json && !bs->file->bs->full_open_options) { |
2c31b04c HR |
695 | /* The config file cannot be recreated, so creating a plain filename |
696 | * is impossible */ | |
697 | return; | |
698 | } | |
699 | ||
9a4f4c31 | 700 | if (!force_json && bs->file->bs->exact_filename[0]) { |
8779441b HR |
701 | snprintf(bs->exact_filename, sizeof(bs->exact_filename), |
702 | "blkdebug:%s:%s", | |
4cdd01d3 | 703 | qdict_get_try_str(options, "config") ?: "", |
9a4f4c31 | 704 | bs->file->bs->exact_filename); |
8779441b HR |
705 | } |
706 | ||
2c31b04c HR |
707 | opts = qdict_new(); |
708 | qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug"))); | |
709 | ||
9a4f4c31 KW |
710 | QINCREF(bs->file->bs->full_open_options); |
711 | qdict_put_obj(opts, "image", QOBJECT(bs->file->bs->full_open_options)); | |
2c31b04c | 712 | |
4cdd01d3 KW |
713 | for (e = qdict_first(options); e; e = qdict_next(options, e)) { |
714 | if (strcmp(qdict_entry_key(e), "x-image")) { | |
8779441b HR |
715 | qobject_incref(qdict_entry_value(e)); |
716 | qdict_put_obj(opts, qdict_entry_key(e), qdict_entry_value(e)); | |
2c31b04c HR |
717 | } |
718 | } | |
719 | ||
2c31b04c HR |
720 | bs->full_open_options = opts; |
721 | } | |
722 | ||
c5e8bfb7 KW |
723 | static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, |
724 | BlockReopenQueue *queue, Error **errp) | |
725 | { | |
726 | return 0; | |
727 | } | |
728 | ||
6a143727 | 729 | static BlockDriver bdrv_blkdebug = { |
f4681212 KW |
730 | .format_name = "blkdebug", |
731 | .protocol_name = "blkdebug", | |
732 | .instance_size = sizeof(BDRVBlkdebugState), | |
6a143727 | 733 | |
f4681212 KW |
734 | .bdrv_parse_filename = blkdebug_parse_filename, |
735 | .bdrv_file_open = blkdebug_open, | |
736 | .bdrv_close = blkdebug_close, | |
c5e8bfb7 | 737 | .bdrv_reopen_prepare = blkdebug_reopen_prepare, |
f4681212 | 738 | .bdrv_getlength = blkdebug_getlength, |
8eedfbd4 | 739 | .bdrv_truncate = blkdebug_truncate, |
2c31b04c | 740 | .bdrv_refresh_filename = blkdebug_refresh_filename, |
6a143727 | 741 | |
f4681212 KW |
742 | .bdrv_aio_readv = blkdebug_aio_readv, |
743 | .bdrv_aio_writev = blkdebug_aio_writev, | |
9e52c53b | 744 | .bdrv_aio_flush = blkdebug_aio_flush, |
8b9b0cc2 | 745 | |
3c90c65d KW |
746 | .bdrv_debug_event = blkdebug_debug_event, |
747 | .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, | |
4cc70e93 FZ |
748 | .bdrv_debug_remove_breakpoint |
749 | = blkdebug_debug_remove_breakpoint, | |
3c90c65d KW |
750 | .bdrv_debug_resume = blkdebug_debug_resume, |
751 | .bdrv_debug_is_suspended = blkdebug_debug_is_suspended, | |
6a143727 KW |
752 | }; |
753 | ||
754 | static void bdrv_blkdebug_init(void) | |
755 | { | |
756 | bdrv_register(&bdrv_blkdebug); | |
757 | } | |
758 | ||
759 | block_init(bdrv_blkdebug_init); |