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2f0c9fe6 PB |
1 | /* |
2 | * QEMU System Emulator block driver | |
3 | * | |
4 | * Copyright (c) 2011 IBM Corp. | |
5 | * Copyright (c) 2012 Red Hat, Inc. | |
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 | ||
d38ea87a | 26 | #include "qemu/osdep.h" |
2f0c9fe6 PB |
27 | #include "qemu-common.h" |
28 | #include "trace.h" | |
737e150e PB |
29 | #include "block/block.h" |
30 | #include "block/blockjob.h" | |
31 | #include "block/block_int.h" | |
373340b2 | 32 | #include "sysemu/block-backend.h" |
cc7a8ea7 | 33 | #include "qapi/qmp/qerror.h" |
7b1b5d19 | 34 | #include "qapi/qmp/qjson.h" |
10817bf0 | 35 | #include "qemu/coroutine.h" |
7f0317cf | 36 | #include "qemu/id.h" |
2f0c9fe6 | 37 | #include "qmp-commands.h" |
1de7afc9 | 38 | #include "qemu/timer.h" |
5a2d2cbd | 39 | #include "qapi-event.h" |
2f0c9fe6 | 40 | |
c55a832f FZ |
41 | /* Transactional group of block jobs */ |
42 | struct BlockJobTxn { | |
43 | ||
44 | /* Is this txn being cancelled? */ | |
45 | bool aborting; | |
46 | ||
47 | /* List of jobs */ | |
48 | QLIST_HEAD(, BlockJob) jobs; | |
49 | ||
50 | /* Reference count */ | |
51 | int refcnt; | |
52 | }; | |
53 | ||
a7112795 AG |
54 | static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs); |
55 | ||
56 | BlockJob *block_job_next(BlockJob *job) | |
57 | { | |
58 | if (!job) { | |
59 | return QLIST_FIRST(&block_jobs); | |
60 | } | |
61 | return QLIST_NEXT(job, job_list); | |
62 | } | |
63 | ||
ffb1f10c AG |
64 | BlockJob *block_job_get(const char *id) |
65 | { | |
66 | BlockJob *job; | |
67 | ||
68 | QLIST_FOREACH(job, &block_jobs, job_list) { | |
69 | if (!strcmp(id, job->id)) { | |
70 | return job; | |
71 | } | |
72 | } | |
73 | ||
74 | return NULL; | |
75 | } | |
76 | ||
463e0be1 SH |
77 | static void block_job_attached_aio_context(AioContext *new_context, |
78 | void *opaque) | |
79 | { | |
80 | BlockJob *job = opaque; | |
81 | ||
82 | if (job->driver->attached_aio_context) { | |
83 | job->driver->attached_aio_context(job, new_context); | |
84 | } | |
85 | ||
86 | block_job_resume(job); | |
87 | } | |
88 | ||
bae8196d PB |
89 | static void block_job_drain(BlockJob *job) |
90 | { | |
91 | /* If job is !job->busy this kicks it into the next pause point. */ | |
92 | block_job_enter(job); | |
93 | ||
94 | blk_drain(job->blk); | |
95 | if (job->driver->drain) { | |
96 | job->driver->drain(job); | |
97 | } | |
98 | } | |
99 | ||
463e0be1 SH |
100 | static void block_job_detach_aio_context(void *opaque) |
101 | { | |
102 | BlockJob *job = opaque; | |
103 | ||
104 | /* In case the job terminates during aio_poll()... */ | |
105 | block_job_ref(job); | |
106 | ||
107 | block_job_pause(job); | |
108 | ||
463e0be1 | 109 | while (!job->paused && !job->completed) { |
bae8196d | 110 | block_job_drain(job); |
463e0be1 SH |
111 | } |
112 | ||
113 | block_job_unref(job); | |
114 | } | |
115 | ||
23d402d4 AG |
116 | void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs) |
117 | { | |
118 | job->nodes = g_slist_prepend(job->nodes, bs); | |
119 | bdrv_ref(bs); | |
120 | bdrv_op_block_all(bs, job->blocker); | |
121 | } | |
122 | ||
7f0317cf AG |
123 | void *block_job_create(const char *job_id, const BlockJobDriver *driver, |
124 | BlockDriverState *bs, int64_t speed, | |
125 | BlockCompletionFunc *cb, void *opaque, Error **errp) | |
2f0c9fe6 | 126 | { |
b6d2e599 | 127 | BlockBackend *blk; |
2f0c9fe6 PB |
128 | BlockJob *job; |
129 | ||
b48100cf | 130 | assert(cb); |
628ff683 | 131 | if (bs->job) { |
c6bd8c70 | 132 | error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
2f0c9fe6 PB |
133 | return NULL; |
134 | } | |
b6d2e599 | 135 | |
7f0317cf AG |
136 | if (job_id == NULL) { |
137 | job_id = bdrv_get_device_name(bs); | |
1562047c KW |
138 | if (!*job_id) { |
139 | error_setg(errp, "An explicit job ID is required for this node"); | |
140 | return NULL; | |
141 | } | |
7f0317cf AG |
142 | } |
143 | ||
144 | if (!id_wellformed(job_id)) { | |
145 | error_setg(errp, "Invalid job ID '%s'", job_id); | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | if (block_job_get(job_id)) { | |
150 | error_setg(errp, "Job ID '%s' already in use", job_id); | |
151 | return NULL; | |
152 | } | |
153 | ||
b6d2e599 KW |
154 | blk = blk_new(); |
155 | blk_insert_bs(blk, bs); | |
156 | ||
3fc4b10a | 157 | job = g_malloc0(driver->instance_size); |
3718d8ab FZ |
158 | error_setg(&job->blocker, "block device is in use by block job: %s", |
159 | BlockJobType_lookup[driver->job_type]); | |
23d402d4 | 160 | block_job_add_bdrv(job, bs); |
b112a65c | 161 | bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); |
3718d8ab | 162 | |
3fc4b10a | 163 | job->driver = driver; |
7f0317cf | 164 | job->id = g_strdup(job_id); |
b6d2e599 | 165 | job->blk = blk; |
2f0c9fe6 PB |
166 | job->cb = cb; |
167 | job->opaque = opaque; | |
168 | job->busy = true; | |
18930ba3 | 169 | job->refcnt = 1; |
2f0c9fe6 PB |
170 | bs->job = job; |
171 | ||
a7112795 AG |
172 | QLIST_INSERT_HEAD(&block_jobs, job, job_list); |
173 | ||
463e0be1 SH |
174 | blk_add_aio_context_notifier(blk, block_job_attached_aio_context, |
175 | block_job_detach_aio_context, job); | |
176 | ||
2f0c9fe6 PB |
177 | /* Only set speed when necessary to avoid NotSupported error */ |
178 | if (speed != 0) { | |
179 | Error *local_err = NULL; | |
180 | ||
181 | block_job_set_speed(job, speed, &local_err); | |
84d18f06 | 182 | if (local_err) { |
18930ba3 | 183 | block_job_unref(job); |
2f0c9fe6 PB |
184 | error_propagate(errp, local_err); |
185 | return NULL; | |
186 | } | |
187 | } | |
188 | return job; | |
189 | } | |
190 | ||
18930ba3 | 191 | void block_job_ref(BlockJob *job) |
2f0c9fe6 | 192 | { |
18930ba3 FZ |
193 | ++job->refcnt; |
194 | } | |
2f0c9fe6 | 195 | |
18930ba3 FZ |
196 | void block_job_unref(BlockJob *job) |
197 | { | |
198 | if (--job->refcnt == 0) { | |
23d402d4 | 199 | GSList *l; |
b6d2e599 KW |
200 | BlockDriverState *bs = blk_bs(job->blk); |
201 | bs->job = NULL; | |
23d402d4 AG |
202 | for (l = job->nodes; l; l = l->next) { |
203 | bs = l->data; | |
204 | bdrv_op_unblock_all(bs, job->blocker); | |
205 | bdrv_unref(bs); | |
206 | } | |
207 | g_slist_free(job->nodes); | |
463e0be1 SH |
208 | blk_remove_aio_context_notifier(job->blk, |
209 | block_job_attached_aio_context, | |
210 | block_job_detach_aio_context, job); | |
b6d2e599 | 211 | blk_unref(job->blk); |
18930ba3 FZ |
212 | error_free(job->blocker); |
213 | g_free(job->id); | |
a7112795 | 214 | QLIST_REMOVE(job, job_list); |
18930ba3 FZ |
215 | g_free(job); |
216 | } | |
2f0c9fe6 PB |
217 | } |
218 | ||
c55a832f FZ |
219 | static void block_job_completed_single(BlockJob *job) |
220 | { | |
221 | if (!job->ret) { | |
222 | if (job->driver->commit) { | |
223 | job->driver->commit(job); | |
224 | } | |
225 | } else { | |
226 | if (job->driver->abort) { | |
227 | job->driver->abort(job); | |
228 | } | |
229 | } | |
230 | job->cb(job->opaque, job->ret); | |
231 | if (job->txn) { | |
232 | block_job_txn_unref(job->txn); | |
233 | } | |
234 | block_job_unref(job); | |
235 | } | |
236 | ||
237 | static void block_job_completed_txn_abort(BlockJob *job) | |
238 | { | |
239 | AioContext *ctx; | |
240 | BlockJobTxn *txn = job->txn; | |
241 | BlockJob *other_job, *next; | |
242 | ||
243 | if (txn->aborting) { | |
244 | /* | |
245 | * We are cancelled by another job, which will handle everything. | |
246 | */ | |
247 | return; | |
248 | } | |
249 | txn->aborting = true; | |
250 | /* We are the first failed job. Cancel other jobs. */ | |
251 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
b6d2e599 | 252 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
253 | aio_context_acquire(ctx); |
254 | } | |
255 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
256 | if (other_job == job || other_job->completed) { | |
257 | /* Other jobs are "effectively" cancelled by us, set the status for | |
258 | * them; this job, however, may or may not be cancelled, depending | |
259 | * on the caller, so leave it. */ | |
260 | if (other_job != job) { | |
261 | other_job->cancelled = true; | |
262 | } | |
263 | continue; | |
264 | } | |
265 | block_job_cancel_sync(other_job); | |
266 | assert(other_job->completed); | |
267 | } | |
268 | QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { | |
b6d2e599 | 269 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
270 | block_job_completed_single(other_job); |
271 | aio_context_release(ctx); | |
272 | } | |
273 | } | |
274 | ||
275 | static void block_job_completed_txn_success(BlockJob *job) | |
276 | { | |
277 | AioContext *ctx; | |
278 | BlockJobTxn *txn = job->txn; | |
279 | BlockJob *other_job, *next; | |
280 | /* | |
281 | * Successful completion, see if there are other running jobs in this | |
282 | * txn. | |
283 | */ | |
284 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
285 | if (!other_job->completed) { | |
286 | return; | |
287 | } | |
288 | } | |
289 | /* We are the last completed job, commit the transaction. */ | |
290 | QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { | |
b6d2e599 | 291 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
292 | aio_context_acquire(ctx); |
293 | assert(other_job->ret == 0); | |
294 | block_job_completed_single(other_job); | |
295 | aio_context_release(ctx); | |
296 | } | |
297 | } | |
298 | ||
97031164 TW |
299 | void block_job_completed(BlockJob *job, int ret) |
300 | { | |
b6d2e599 | 301 | assert(blk_bs(job->blk)->job == job); |
a689dbf2 FZ |
302 | assert(!job->completed); |
303 | job->completed = true; | |
304 | job->ret = ret; | |
c55a832f FZ |
305 | if (!job->txn) { |
306 | block_job_completed_single(job); | |
307 | } else if (ret < 0 || block_job_is_cancelled(job)) { | |
308 | block_job_completed_txn_abort(job); | |
309 | } else { | |
310 | block_job_completed_txn_success(job); | |
311 | } | |
97031164 TW |
312 | } |
313 | ||
2f0c9fe6 PB |
314 | void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) |
315 | { | |
316 | Error *local_err = NULL; | |
317 | ||
3fc4b10a | 318 | if (!job->driver->set_speed) { |
c6bd8c70 | 319 | error_setg(errp, QERR_UNSUPPORTED); |
2f0c9fe6 PB |
320 | return; |
321 | } | |
3fc4b10a | 322 | job->driver->set_speed(job, speed, &local_err); |
84d18f06 | 323 | if (local_err) { |
2f0c9fe6 PB |
324 | error_propagate(errp, local_err); |
325 | return; | |
326 | } | |
327 | ||
328 | job->speed = speed; | |
329 | } | |
330 | ||
aeae883b PB |
331 | void block_job_complete(BlockJob *job, Error **errp) |
332 | { | |
751ebd76 | 333 | if (job->pause_count || job->cancelled || !job->driver->complete) { |
9df229c3 AG |
334 | error_setg(errp, "The active block job '%s' cannot be completed", |
335 | job->id); | |
aeae883b PB |
336 | return; |
337 | } | |
338 | ||
3fc4b10a | 339 | job->driver->complete(job, errp); |
aeae883b PB |
340 | } |
341 | ||
8acc72a4 | 342 | void block_job_pause(BlockJob *job) |
2f0c9fe6 | 343 | { |
751ebd76 | 344 | job->pause_count++; |
8acc72a4 PB |
345 | } |
346 | ||
a7f3b7ff | 347 | static bool block_job_should_pause(BlockJob *job) |
8acc72a4 | 348 | { |
751ebd76 | 349 | return job->pause_count > 0; |
8acc72a4 PB |
350 | } |
351 | ||
fc9c0a9c SH |
352 | void coroutine_fn block_job_pause_point(BlockJob *job) |
353 | { | |
354 | if (!block_job_should_pause(job)) { | |
355 | return; | |
356 | } | |
357 | if (block_job_is_cancelled(job)) { | |
358 | return; | |
359 | } | |
360 | ||
361 | if (job->driver->pause) { | |
362 | job->driver->pause(job); | |
363 | } | |
364 | ||
365 | if (block_job_should_pause(job) && !block_job_is_cancelled(job)) { | |
366 | job->paused = true; | |
367 | job->busy = false; | |
368 | qemu_coroutine_yield(); /* wait for block_job_resume() */ | |
369 | job->busy = true; | |
370 | job->paused = false; | |
371 | } | |
372 | ||
373 | if (job->driver->resume) { | |
374 | job->driver->resume(job); | |
375 | } | |
376 | } | |
377 | ||
8acc72a4 PB |
378 | void block_job_resume(BlockJob *job) |
379 | { | |
751ebd76 FZ |
380 | assert(job->pause_count > 0); |
381 | job->pause_count--; | |
382 | if (job->pause_count) { | |
383 | return; | |
384 | } | |
385 | block_job_enter(job); | |
386 | } | |
387 | ||
388 | void block_job_enter(BlockJob *job) | |
389 | { | |
2f0c9fe6 | 390 | if (job->co && !job->busy) { |
0b8b8753 | 391 | qemu_coroutine_enter(job->co); |
2f0c9fe6 PB |
392 | } |
393 | } | |
394 | ||
8acc72a4 PB |
395 | void block_job_cancel(BlockJob *job) |
396 | { | |
397 | job->cancelled = true; | |
17bd51f9 | 398 | block_job_iostatus_reset(job); |
751ebd76 | 399 | block_job_enter(job); |
8acc72a4 PB |
400 | } |
401 | ||
2f0c9fe6 PB |
402 | bool block_job_is_cancelled(BlockJob *job) |
403 | { | |
404 | return job->cancelled; | |
405 | } | |
406 | ||
32c81a4a PB |
407 | void block_job_iostatus_reset(BlockJob *job) |
408 | { | |
409 | job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; | |
3fc4b10a FZ |
410 | if (job->driver->iostatus_reset) { |
411 | job->driver->iostatus_reset(job); | |
3bd293c3 | 412 | } |
32c81a4a PB |
413 | } |
414 | ||
345f9e1b HR |
415 | static int block_job_finish_sync(BlockJob *job, |
416 | void (*finish)(BlockJob *, Error **errp), | |
417 | Error **errp) | |
2f0c9fe6 | 418 | { |
345f9e1b | 419 | Error *local_err = NULL; |
94db6d2d | 420 | int ret; |
2f0c9fe6 | 421 | |
b6d2e599 | 422 | assert(blk_bs(job->blk)->job == job); |
2f0c9fe6 | 423 | |
94db6d2d | 424 | block_job_ref(job); |
bae8196d | 425 | |
345f9e1b HR |
426 | finish(job, &local_err); |
427 | if (local_err) { | |
428 | error_propagate(errp, local_err); | |
94db6d2d | 429 | block_job_unref(job); |
345f9e1b HR |
430 | return -EBUSY; |
431 | } | |
bae8196d PB |
432 | /* block_job_drain calls block_job_enter, and it should be enough to |
433 | * induce progress until the job completes or moves to the main thread. | |
434 | */ | |
435 | while (!job->deferred_to_main_loop && !job->completed) { | |
436 | block_job_drain(job); | |
437 | } | |
94db6d2d | 438 | while (!job->completed) { |
bae8196d | 439 | aio_poll(qemu_get_aio_context(), true); |
2f0c9fe6 | 440 | } |
94db6d2d FZ |
441 | ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret; |
442 | block_job_unref(job); | |
443 | return ret; | |
2f0c9fe6 PB |
444 | } |
445 | ||
345f9e1b HR |
446 | /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be |
447 | * used with block_job_finish_sync() without the need for (rather nasty) | |
448 | * function pointer casts there. */ | |
449 | static void block_job_cancel_err(BlockJob *job, Error **errp) | |
450 | { | |
451 | block_job_cancel(job); | |
452 | } | |
453 | ||
454 | int block_job_cancel_sync(BlockJob *job) | |
455 | { | |
456 | return block_job_finish_sync(job, &block_job_cancel_err, NULL); | |
457 | } | |
458 | ||
a1a2af07 KW |
459 | void block_job_cancel_sync_all(void) |
460 | { | |
461 | BlockJob *job; | |
462 | AioContext *aio_context; | |
463 | ||
464 | while ((job = QLIST_FIRST(&block_jobs))) { | |
b6d2e599 | 465 | aio_context = blk_get_aio_context(job->blk); |
a1a2af07 KW |
466 | aio_context_acquire(aio_context); |
467 | block_job_cancel_sync(job); | |
468 | aio_context_release(aio_context); | |
469 | } | |
470 | } | |
471 | ||
345f9e1b HR |
472 | int block_job_complete_sync(BlockJob *job, Error **errp) |
473 | { | |
474 | return block_job_finish_sync(job, &block_job_complete, errp); | |
475 | } | |
476 | ||
7483d1e5 | 477 | void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns) |
2f0c9fe6 | 478 | { |
8acc72a4 PB |
479 | assert(job->busy); |
480 | ||
2f0c9fe6 | 481 | /* Check cancellation *before* setting busy = false, too! */ |
8acc72a4 PB |
482 | if (block_job_is_cancelled(job)) { |
483 | return; | |
484 | } | |
485 | ||
486 | job->busy = false; | |
a7f3b7ff | 487 | if (!block_job_should_pause(job)) { |
0824afda AG |
488 | co_aio_sleep_ns(blk_get_aio_context(job->blk), type, ns); |
489 | } | |
8acc72a4 | 490 | job->busy = true; |
fc9c0a9c SH |
491 | |
492 | block_job_pause_point(job); | |
2f0c9fe6 | 493 | } |
30e628b7 | 494 | |
dc71ce45 FZ |
495 | void block_job_yield(BlockJob *job) |
496 | { | |
497 | assert(job->busy); | |
498 | ||
499 | /* Check cancellation *before* setting busy = false, too! */ | |
500 | if (block_job_is_cancelled(job)) { | |
501 | return; | |
502 | } | |
503 | ||
504 | job->busy = false; | |
fc9c0a9c SH |
505 | if (!block_job_should_pause(job)) { |
506 | qemu_coroutine_yield(); | |
507 | } | |
dc71ce45 | 508 | job->busy = true; |
fc9c0a9c SH |
509 | |
510 | block_job_pause_point(job); | |
dc71ce45 FZ |
511 | } |
512 | ||
30e628b7 PB |
513 | BlockJobInfo *block_job_query(BlockJob *job) |
514 | { | |
515 | BlockJobInfo *info = g_new0(BlockJobInfo, 1); | |
79e14bf7 | 516 | info->type = g_strdup(BlockJobType_lookup[job->driver->job_type]); |
8ccb9569 | 517 | info->device = g_strdup(job->id); |
32c81a4a PB |
518 | info->len = job->len; |
519 | info->busy = job->busy; | |
751ebd76 | 520 | info->paused = job->pause_count > 0; |
32c81a4a PB |
521 | info->offset = job->offset; |
522 | info->speed = job->speed; | |
523 | info->io_status = job->iostatus; | |
ef6dbf1e | 524 | info->ready = job->ready; |
30e628b7 PB |
525 | return info; |
526 | } | |
32c81a4a PB |
527 | |
528 | static void block_job_iostatus_set_err(BlockJob *job, int error) | |
529 | { | |
530 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { | |
531 | job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : | |
532 | BLOCK_DEVICE_IO_STATUS_FAILED; | |
533 | } | |
534 | } | |
535 | ||
bcada37b WX |
536 | void block_job_event_cancelled(BlockJob *job) |
537 | { | |
538 | qapi_event_send_block_job_cancelled(job->driver->job_type, | |
8ccb9569 | 539 | job->id, |
bcada37b WX |
540 | job->len, |
541 | job->offset, | |
542 | job->speed, | |
543 | &error_abort); | |
544 | } | |
32c81a4a | 545 | |
bcada37b | 546 | void block_job_event_completed(BlockJob *job, const char *msg) |
a66a2a36 | 547 | { |
bcada37b | 548 | qapi_event_send_block_job_completed(job->driver->job_type, |
8ccb9569 | 549 | job->id, |
bcada37b WX |
550 | job->len, |
551 | job->offset, | |
552 | job->speed, | |
553 | !!msg, | |
554 | msg, | |
555 | &error_abort); | |
a66a2a36 PB |
556 | } |
557 | ||
bcada37b | 558 | void block_job_event_ready(BlockJob *job) |
a66a2a36 | 559 | { |
ef6dbf1e HR |
560 | job->ready = true; |
561 | ||
518848a2 | 562 | qapi_event_send_block_job_ready(job->driver->job_type, |
8ccb9569 | 563 | job->id, |
518848a2 MA |
564 | job->len, |
565 | job->offset, | |
566 | job->speed, &error_abort); | |
a66a2a36 PB |
567 | } |
568 | ||
81e254dc | 569 | BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, |
32c81a4a PB |
570 | int is_read, int error) |
571 | { | |
572 | BlockErrorAction action; | |
573 | ||
574 | switch (on_err) { | |
575 | case BLOCKDEV_ON_ERROR_ENOSPC: | |
8c398252 | 576 | case BLOCKDEV_ON_ERROR_AUTO: |
a589569f WX |
577 | action = (error == ENOSPC) ? |
578 | BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; | |
32c81a4a PB |
579 | break; |
580 | case BLOCKDEV_ON_ERROR_STOP: | |
a589569f | 581 | action = BLOCK_ERROR_ACTION_STOP; |
32c81a4a PB |
582 | break; |
583 | case BLOCKDEV_ON_ERROR_REPORT: | |
a589569f | 584 | action = BLOCK_ERROR_ACTION_REPORT; |
32c81a4a PB |
585 | break; |
586 | case BLOCKDEV_ON_ERROR_IGNORE: | |
a589569f | 587 | action = BLOCK_ERROR_ACTION_IGNORE; |
32c81a4a PB |
588 | break; |
589 | default: | |
590 | abort(); | |
591 | } | |
8ccb9569 | 592 | qapi_event_send_block_job_error(job->id, |
5a2d2cbd WX |
593 | is_read ? IO_OPERATION_TYPE_READ : |
594 | IO_OPERATION_TYPE_WRITE, | |
595 | action, &error_abort); | |
a589569f | 596 | if (action == BLOCK_ERROR_ACTION_STOP) { |
751ebd76 FZ |
597 | /* make the pause user visible, which will be resumed from QMP. */ |
598 | job->user_paused = true; | |
32c81a4a PB |
599 | block_job_pause(job); |
600 | block_job_iostatus_set_err(job, error); | |
32c81a4a PB |
601 | } |
602 | return action; | |
603 | } | |
dec7d421 SH |
604 | |
605 | typedef struct { | |
606 | BlockJob *job; | |
dec7d421 SH |
607 | AioContext *aio_context; |
608 | BlockJobDeferToMainLoopFn *fn; | |
609 | void *opaque; | |
610 | } BlockJobDeferToMainLoopData; | |
611 | ||
612 | static void block_job_defer_to_main_loop_bh(void *opaque) | |
613 | { | |
614 | BlockJobDeferToMainLoopData *data = opaque; | |
615 | AioContext *aio_context; | |
616 | ||
dec7d421 SH |
617 | /* Prevent race with block_job_defer_to_main_loop() */ |
618 | aio_context_acquire(data->aio_context); | |
619 | ||
620 | /* Fetch BDS AioContext again, in case it has changed */ | |
b6d2e599 | 621 | aio_context = blk_get_aio_context(data->job->blk); |
dec7d421 SH |
622 | aio_context_acquire(aio_context); |
623 | ||
794f0141 | 624 | data->job->deferred_to_main_loop = false; |
dec7d421 SH |
625 | data->fn(data->job, data->opaque); |
626 | ||
627 | aio_context_release(aio_context); | |
628 | ||
629 | aio_context_release(data->aio_context); | |
630 | ||
631 | g_free(data); | |
632 | } | |
633 | ||
634 | void block_job_defer_to_main_loop(BlockJob *job, | |
635 | BlockJobDeferToMainLoopFn *fn, | |
636 | void *opaque) | |
637 | { | |
638 | BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data)); | |
639 | data->job = job; | |
b6d2e599 | 640 | data->aio_context = blk_get_aio_context(job->blk); |
dec7d421 SH |
641 | data->fn = fn; |
642 | data->opaque = opaque; | |
794f0141 | 643 | job->deferred_to_main_loop = true; |
dec7d421 | 644 | |
fffb6e12 PB |
645 | aio_bh_schedule_oneshot(qemu_get_aio_context(), |
646 | block_job_defer_to_main_loop_bh, data); | |
dec7d421 | 647 | } |
c55a832f FZ |
648 | |
649 | BlockJobTxn *block_job_txn_new(void) | |
650 | { | |
651 | BlockJobTxn *txn = g_new0(BlockJobTxn, 1); | |
652 | QLIST_INIT(&txn->jobs); | |
653 | txn->refcnt = 1; | |
654 | return txn; | |
655 | } | |
656 | ||
657 | static void block_job_txn_ref(BlockJobTxn *txn) | |
658 | { | |
659 | txn->refcnt++; | |
660 | } | |
661 | ||
662 | void block_job_txn_unref(BlockJobTxn *txn) | |
663 | { | |
664 | if (txn && --txn->refcnt == 0) { | |
665 | g_free(txn); | |
666 | } | |
667 | } | |
668 | ||
669 | void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job) | |
670 | { | |
671 | if (!txn) { | |
672 | return; | |
673 | } | |
674 | ||
675 | assert(!job->txn); | |
676 | job->txn = txn; | |
677 | ||
678 | QLIST_INSERT_HEAD(&txn->jobs, job, txn_list); | |
679 | block_job_txn_ref(txn); | |
680 | } |