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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 | |
8254b6d9 JS |
41 | static void block_job_event_cancelled(BlockJob *job); |
42 | static void block_job_event_completed(BlockJob *job, const char *msg); | |
43 | ||
c55a832f FZ |
44 | /* Transactional group of block jobs */ |
45 | struct BlockJobTxn { | |
46 | ||
47 | /* Is this txn being cancelled? */ | |
48 | bool aborting; | |
49 | ||
50 | /* List of jobs */ | |
51 | QLIST_HEAD(, BlockJob) jobs; | |
52 | ||
53 | /* Reference count */ | |
54 | int refcnt; | |
55 | }; | |
56 | ||
a7112795 AG |
57 | static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs); |
58 | ||
59 | BlockJob *block_job_next(BlockJob *job) | |
60 | { | |
61 | if (!job) { | |
62 | return QLIST_FIRST(&block_jobs); | |
63 | } | |
64 | return QLIST_NEXT(job, job_list); | |
65 | } | |
66 | ||
ffb1f10c AG |
67 | BlockJob *block_job_get(const char *id) |
68 | { | |
69 | BlockJob *job; | |
70 | ||
71 | QLIST_FOREACH(job, &block_jobs, job_list) { | |
559b935f | 72 | if (job->id && !strcmp(id, job->id)) { |
ffb1f10c AG |
73 | return job; |
74 | } | |
75 | } | |
76 | ||
77 | return NULL; | |
78 | } | |
79 | ||
463e0be1 SH |
80 | static void block_job_attached_aio_context(AioContext *new_context, |
81 | void *opaque) | |
82 | { | |
83 | BlockJob *job = opaque; | |
84 | ||
85 | if (job->driver->attached_aio_context) { | |
86 | job->driver->attached_aio_context(job, new_context); | |
87 | } | |
88 | ||
89 | block_job_resume(job); | |
90 | } | |
91 | ||
bae8196d PB |
92 | static void block_job_drain(BlockJob *job) |
93 | { | |
94 | /* If job is !job->busy this kicks it into the next pause point. */ | |
95 | block_job_enter(job); | |
96 | ||
97 | blk_drain(job->blk); | |
98 | if (job->driver->drain) { | |
99 | job->driver->drain(job); | |
100 | } | |
101 | } | |
102 | ||
463e0be1 SH |
103 | static void block_job_detach_aio_context(void *opaque) |
104 | { | |
105 | BlockJob *job = opaque; | |
106 | ||
107 | /* In case the job terminates during aio_poll()... */ | |
108 | block_job_ref(job); | |
109 | ||
110 | block_job_pause(job); | |
111 | ||
463e0be1 | 112 | while (!job->paused && !job->completed) { |
bae8196d | 113 | block_job_drain(job); |
463e0be1 SH |
114 | } |
115 | ||
116 | block_job_unref(job); | |
117 | } | |
118 | ||
23d402d4 AG |
119 | void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs) |
120 | { | |
121 | job->nodes = g_slist_prepend(job->nodes, bs); | |
122 | bdrv_ref(bs); | |
123 | bdrv_op_block_all(bs, job->blocker); | |
124 | } | |
125 | ||
7f0317cf | 126 | void *block_job_create(const char *job_id, const BlockJobDriver *driver, |
f81e0b45 | 127 | BlockDriverState *bs, int64_t speed, int flags, |
7f0317cf | 128 | BlockCompletionFunc *cb, void *opaque, Error **errp) |
2f0c9fe6 | 129 | { |
b6d2e599 | 130 | BlockBackend *blk; |
2f0c9fe6 PB |
131 | BlockJob *job; |
132 | ||
628ff683 | 133 | if (bs->job) { |
c6bd8c70 | 134 | error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
2f0c9fe6 PB |
135 | return NULL; |
136 | } | |
b6d2e599 | 137 | |
f81e0b45 | 138 | if (job_id == NULL && !(flags & BLOCK_JOB_INTERNAL)) { |
7f0317cf | 139 | job_id = bdrv_get_device_name(bs); |
1562047c KW |
140 | if (!*job_id) { |
141 | error_setg(errp, "An explicit job ID is required for this node"); | |
142 | return NULL; | |
143 | } | |
7f0317cf AG |
144 | } |
145 | ||
f81e0b45 JS |
146 | if (job_id) { |
147 | if (flags & BLOCK_JOB_INTERNAL) { | |
148 | error_setg(errp, "Cannot specify job ID for internal block job"); | |
149 | return NULL; | |
150 | } | |
7f0317cf | 151 | |
f81e0b45 JS |
152 | if (!id_wellformed(job_id)) { |
153 | error_setg(errp, "Invalid job ID '%s'", job_id); | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | if (block_job_get(job_id)) { | |
158 | error_setg(errp, "Job ID '%s' already in use", job_id); | |
159 | return NULL; | |
160 | } | |
7f0317cf AG |
161 | } |
162 | ||
b6d2e599 KW |
163 | blk = blk_new(); |
164 | blk_insert_bs(blk, bs); | |
165 | ||
3fc4b10a | 166 | job = g_malloc0(driver->instance_size); |
3718d8ab FZ |
167 | error_setg(&job->blocker, "block device is in use by block job: %s", |
168 | BlockJobType_lookup[driver->job_type]); | |
23d402d4 | 169 | block_job_add_bdrv(job, bs); |
b112a65c | 170 | bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); |
3718d8ab | 171 | |
3fc4b10a | 172 | job->driver = driver; |
7f0317cf | 173 | job->id = g_strdup(job_id); |
b6d2e599 | 174 | job->blk = blk; |
2f0c9fe6 PB |
175 | job->cb = cb; |
176 | job->opaque = opaque; | |
177 | job->busy = true; | |
18930ba3 | 178 | job->refcnt = 1; |
2f0c9fe6 PB |
179 | bs->job = job; |
180 | ||
a7112795 AG |
181 | QLIST_INSERT_HEAD(&block_jobs, job, job_list); |
182 | ||
463e0be1 SH |
183 | blk_add_aio_context_notifier(blk, block_job_attached_aio_context, |
184 | block_job_detach_aio_context, job); | |
185 | ||
2f0c9fe6 PB |
186 | /* Only set speed when necessary to avoid NotSupported error */ |
187 | if (speed != 0) { | |
188 | Error *local_err = NULL; | |
189 | ||
190 | block_job_set_speed(job, speed, &local_err); | |
84d18f06 | 191 | if (local_err) { |
18930ba3 | 192 | block_job_unref(job); |
2f0c9fe6 PB |
193 | error_propagate(errp, local_err); |
194 | return NULL; | |
195 | } | |
196 | } | |
197 | return job; | |
198 | } | |
199 | ||
559b935f JS |
200 | bool block_job_is_internal(BlockJob *job) |
201 | { | |
202 | return (job->id == NULL); | |
203 | } | |
204 | ||
18930ba3 | 205 | void block_job_ref(BlockJob *job) |
2f0c9fe6 | 206 | { |
18930ba3 FZ |
207 | ++job->refcnt; |
208 | } | |
2f0c9fe6 | 209 | |
18930ba3 FZ |
210 | void block_job_unref(BlockJob *job) |
211 | { | |
212 | if (--job->refcnt == 0) { | |
23d402d4 | 213 | GSList *l; |
b6d2e599 KW |
214 | BlockDriverState *bs = blk_bs(job->blk); |
215 | bs->job = NULL; | |
23d402d4 AG |
216 | for (l = job->nodes; l; l = l->next) { |
217 | bs = l->data; | |
218 | bdrv_op_unblock_all(bs, job->blocker); | |
219 | bdrv_unref(bs); | |
220 | } | |
221 | g_slist_free(job->nodes); | |
463e0be1 SH |
222 | blk_remove_aio_context_notifier(job->blk, |
223 | block_job_attached_aio_context, | |
224 | block_job_detach_aio_context, job); | |
b6d2e599 | 225 | blk_unref(job->blk); |
18930ba3 FZ |
226 | error_free(job->blocker); |
227 | g_free(job->id); | |
a7112795 | 228 | QLIST_REMOVE(job, job_list); |
18930ba3 FZ |
229 | g_free(job); |
230 | } | |
2f0c9fe6 PB |
231 | } |
232 | ||
c55a832f FZ |
233 | static void block_job_completed_single(BlockJob *job) |
234 | { | |
235 | if (!job->ret) { | |
236 | if (job->driver->commit) { | |
237 | job->driver->commit(job); | |
238 | } | |
239 | } else { | |
240 | if (job->driver->abort) { | |
241 | job->driver->abort(job); | |
242 | } | |
243 | } | |
8254b6d9 JS |
244 | |
245 | if (job->cb) { | |
246 | job->cb(job->opaque, job->ret); | |
247 | } | |
248 | if (block_job_is_cancelled(job)) { | |
249 | block_job_event_cancelled(job); | |
250 | } else { | |
251 | const char *msg = NULL; | |
252 | if (job->ret < 0) { | |
253 | msg = strerror(-job->ret); | |
254 | } | |
255 | block_job_event_completed(job, msg); | |
256 | } | |
257 | ||
c55a832f FZ |
258 | if (job->txn) { |
259 | block_job_txn_unref(job->txn); | |
260 | } | |
261 | block_job_unref(job); | |
262 | } | |
263 | ||
264 | static void block_job_completed_txn_abort(BlockJob *job) | |
265 | { | |
266 | AioContext *ctx; | |
267 | BlockJobTxn *txn = job->txn; | |
268 | BlockJob *other_job, *next; | |
269 | ||
270 | if (txn->aborting) { | |
271 | /* | |
272 | * We are cancelled by another job, which will handle everything. | |
273 | */ | |
274 | return; | |
275 | } | |
276 | txn->aborting = true; | |
277 | /* We are the first failed job. Cancel other jobs. */ | |
278 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
b6d2e599 | 279 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
280 | aio_context_acquire(ctx); |
281 | } | |
282 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
283 | if (other_job == job || other_job->completed) { | |
284 | /* Other jobs are "effectively" cancelled by us, set the status for | |
285 | * them; this job, however, may or may not be cancelled, depending | |
286 | * on the caller, so leave it. */ | |
287 | if (other_job != job) { | |
288 | other_job->cancelled = true; | |
289 | } | |
290 | continue; | |
291 | } | |
292 | block_job_cancel_sync(other_job); | |
293 | assert(other_job->completed); | |
294 | } | |
295 | QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { | |
b6d2e599 | 296 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
297 | block_job_completed_single(other_job); |
298 | aio_context_release(ctx); | |
299 | } | |
300 | } | |
301 | ||
302 | static void block_job_completed_txn_success(BlockJob *job) | |
303 | { | |
304 | AioContext *ctx; | |
305 | BlockJobTxn *txn = job->txn; | |
306 | BlockJob *other_job, *next; | |
307 | /* | |
308 | * Successful completion, see if there are other running jobs in this | |
309 | * txn. | |
310 | */ | |
311 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
312 | if (!other_job->completed) { | |
313 | return; | |
314 | } | |
315 | } | |
316 | /* We are the last completed job, commit the transaction. */ | |
317 | QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { | |
b6d2e599 | 318 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
319 | aio_context_acquire(ctx); |
320 | assert(other_job->ret == 0); | |
321 | block_job_completed_single(other_job); | |
322 | aio_context_release(ctx); | |
323 | } | |
324 | } | |
325 | ||
97031164 TW |
326 | void block_job_completed(BlockJob *job, int ret) |
327 | { | |
b6d2e599 | 328 | assert(blk_bs(job->blk)->job == job); |
a689dbf2 FZ |
329 | assert(!job->completed); |
330 | job->completed = true; | |
331 | job->ret = ret; | |
c55a832f FZ |
332 | if (!job->txn) { |
333 | block_job_completed_single(job); | |
334 | } else if (ret < 0 || block_job_is_cancelled(job)) { | |
335 | block_job_completed_txn_abort(job); | |
336 | } else { | |
337 | block_job_completed_txn_success(job); | |
338 | } | |
97031164 TW |
339 | } |
340 | ||
2f0c9fe6 PB |
341 | void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) |
342 | { | |
343 | Error *local_err = NULL; | |
344 | ||
3fc4b10a | 345 | if (!job->driver->set_speed) { |
c6bd8c70 | 346 | error_setg(errp, QERR_UNSUPPORTED); |
2f0c9fe6 PB |
347 | return; |
348 | } | |
3fc4b10a | 349 | job->driver->set_speed(job, speed, &local_err); |
84d18f06 | 350 | if (local_err) { |
2f0c9fe6 PB |
351 | error_propagate(errp, local_err); |
352 | return; | |
353 | } | |
354 | ||
355 | job->speed = speed; | |
356 | } | |
357 | ||
aeae883b PB |
358 | void block_job_complete(BlockJob *job, Error **errp) |
359 | { | |
559b935f JS |
360 | /* Should not be reachable via external interface for internal jobs */ |
361 | assert(job->id); | |
751ebd76 | 362 | if (job->pause_count || job->cancelled || !job->driver->complete) { |
9df229c3 AG |
363 | error_setg(errp, "The active block job '%s' cannot be completed", |
364 | job->id); | |
aeae883b PB |
365 | return; |
366 | } | |
367 | ||
3fc4b10a | 368 | job->driver->complete(job, errp); |
aeae883b PB |
369 | } |
370 | ||
8acc72a4 | 371 | void block_job_pause(BlockJob *job) |
2f0c9fe6 | 372 | { |
751ebd76 | 373 | job->pause_count++; |
8acc72a4 PB |
374 | } |
375 | ||
a7f3b7ff | 376 | static bool block_job_should_pause(BlockJob *job) |
8acc72a4 | 377 | { |
751ebd76 | 378 | return job->pause_count > 0; |
8acc72a4 PB |
379 | } |
380 | ||
fc9c0a9c SH |
381 | void coroutine_fn block_job_pause_point(BlockJob *job) |
382 | { | |
383 | if (!block_job_should_pause(job)) { | |
384 | return; | |
385 | } | |
386 | if (block_job_is_cancelled(job)) { | |
387 | return; | |
388 | } | |
389 | ||
390 | if (job->driver->pause) { | |
391 | job->driver->pause(job); | |
392 | } | |
393 | ||
394 | if (block_job_should_pause(job) && !block_job_is_cancelled(job)) { | |
395 | job->paused = true; | |
396 | job->busy = false; | |
397 | qemu_coroutine_yield(); /* wait for block_job_resume() */ | |
398 | job->busy = true; | |
399 | job->paused = false; | |
400 | } | |
401 | ||
402 | if (job->driver->resume) { | |
403 | job->driver->resume(job); | |
404 | } | |
405 | } | |
406 | ||
8acc72a4 PB |
407 | void block_job_resume(BlockJob *job) |
408 | { | |
751ebd76 FZ |
409 | assert(job->pause_count > 0); |
410 | job->pause_count--; | |
411 | if (job->pause_count) { | |
412 | return; | |
413 | } | |
414 | block_job_enter(job); | |
415 | } | |
416 | ||
417 | void block_job_enter(BlockJob *job) | |
418 | { | |
2f0c9fe6 | 419 | if (job->co && !job->busy) { |
0b8b8753 | 420 | qemu_coroutine_enter(job->co); |
2f0c9fe6 PB |
421 | } |
422 | } | |
423 | ||
8acc72a4 PB |
424 | void block_job_cancel(BlockJob *job) |
425 | { | |
426 | job->cancelled = true; | |
17bd51f9 | 427 | block_job_iostatus_reset(job); |
751ebd76 | 428 | block_job_enter(job); |
8acc72a4 PB |
429 | } |
430 | ||
2f0c9fe6 PB |
431 | bool block_job_is_cancelled(BlockJob *job) |
432 | { | |
433 | return job->cancelled; | |
434 | } | |
435 | ||
32c81a4a PB |
436 | void block_job_iostatus_reset(BlockJob *job) |
437 | { | |
438 | job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; | |
3fc4b10a FZ |
439 | if (job->driver->iostatus_reset) { |
440 | job->driver->iostatus_reset(job); | |
3bd293c3 | 441 | } |
32c81a4a PB |
442 | } |
443 | ||
345f9e1b HR |
444 | static int block_job_finish_sync(BlockJob *job, |
445 | void (*finish)(BlockJob *, Error **errp), | |
446 | Error **errp) | |
2f0c9fe6 | 447 | { |
345f9e1b | 448 | Error *local_err = NULL; |
94db6d2d | 449 | int ret; |
2f0c9fe6 | 450 | |
b6d2e599 | 451 | assert(blk_bs(job->blk)->job == job); |
2f0c9fe6 | 452 | |
94db6d2d | 453 | block_job_ref(job); |
bae8196d | 454 | |
345f9e1b HR |
455 | finish(job, &local_err); |
456 | if (local_err) { | |
457 | error_propagate(errp, local_err); | |
94db6d2d | 458 | block_job_unref(job); |
345f9e1b HR |
459 | return -EBUSY; |
460 | } | |
bae8196d PB |
461 | /* block_job_drain calls block_job_enter, and it should be enough to |
462 | * induce progress until the job completes or moves to the main thread. | |
463 | */ | |
464 | while (!job->deferred_to_main_loop && !job->completed) { | |
465 | block_job_drain(job); | |
466 | } | |
94db6d2d | 467 | while (!job->completed) { |
bae8196d | 468 | aio_poll(qemu_get_aio_context(), true); |
2f0c9fe6 | 469 | } |
94db6d2d FZ |
470 | ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret; |
471 | block_job_unref(job); | |
472 | return ret; | |
2f0c9fe6 PB |
473 | } |
474 | ||
345f9e1b HR |
475 | /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be |
476 | * used with block_job_finish_sync() without the need for (rather nasty) | |
477 | * function pointer casts there. */ | |
478 | static void block_job_cancel_err(BlockJob *job, Error **errp) | |
479 | { | |
480 | block_job_cancel(job); | |
481 | } | |
482 | ||
483 | int block_job_cancel_sync(BlockJob *job) | |
484 | { | |
485 | return block_job_finish_sync(job, &block_job_cancel_err, NULL); | |
486 | } | |
487 | ||
a1a2af07 KW |
488 | void block_job_cancel_sync_all(void) |
489 | { | |
490 | BlockJob *job; | |
491 | AioContext *aio_context; | |
492 | ||
493 | while ((job = QLIST_FIRST(&block_jobs))) { | |
b6d2e599 | 494 | aio_context = blk_get_aio_context(job->blk); |
a1a2af07 KW |
495 | aio_context_acquire(aio_context); |
496 | block_job_cancel_sync(job); | |
497 | aio_context_release(aio_context); | |
498 | } | |
499 | } | |
500 | ||
345f9e1b HR |
501 | int block_job_complete_sync(BlockJob *job, Error **errp) |
502 | { | |
503 | return block_job_finish_sync(job, &block_job_complete, errp); | |
504 | } | |
505 | ||
7483d1e5 | 506 | void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns) |
2f0c9fe6 | 507 | { |
8acc72a4 PB |
508 | assert(job->busy); |
509 | ||
2f0c9fe6 | 510 | /* Check cancellation *before* setting busy = false, too! */ |
8acc72a4 PB |
511 | if (block_job_is_cancelled(job)) { |
512 | return; | |
513 | } | |
514 | ||
515 | job->busy = false; | |
a7f3b7ff | 516 | if (!block_job_should_pause(job)) { |
0824afda AG |
517 | co_aio_sleep_ns(blk_get_aio_context(job->blk), type, ns); |
518 | } | |
8acc72a4 | 519 | job->busy = true; |
fc9c0a9c SH |
520 | |
521 | block_job_pause_point(job); | |
2f0c9fe6 | 522 | } |
30e628b7 | 523 | |
dc71ce45 FZ |
524 | void block_job_yield(BlockJob *job) |
525 | { | |
526 | assert(job->busy); | |
527 | ||
528 | /* Check cancellation *before* setting busy = false, too! */ | |
529 | if (block_job_is_cancelled(job)) { | |
530 | return; | |
531 | } | |
532 | ||
533 | job->busy = false; | |
fc9c0a9c SH |
534 | if (!block_job_should_pause(job)) { |
535 | qemu_coroutine_yield(); | |
536 | } | |
dc71ce45 | 537 | job->busy = true; |
fc9c0a9c SH |
538 | |
539 | block_job_pause_point(job); | |
dc71ce45 FZ |
540 | } |
541 | ||
559b935f | 542 | BlockJobInfo *block_job_query(BlockJob *job, Error **errp) |
30e628b7 | 543 | { |
559b935f JS |
544 | BlockJobInfo *info; |
545 | ||
546 | if (block_job_is_internal(job)) { | |
547 | error_setg(errp, "Cannot query QEMU internal jobs"); | |
548 | return NULL; | |
549 | } | |
550 | info = g_new0(BlockJobInfo, 1); | |
79e14bf7 | 551 | info->type = g_strdup(BlockJobType_lookup[job->driver->job_type]); |
8ccb9569 | 552 | info->device = g_strdup(job->id); |
32c81a4a PB |
553 | info->len = job->len; |
554 | info->busy = job->busy; | |
751ebd76 | 555 | info->paused = job->pause_count > 0; |
32c81a4a PB |
556 | info->offset = job->offset; |
557 | info->speed = job->speed; | |
558 | info->io_status = job->iostatus; | |
ef6dbf1e | 559 | info->ready = job->ready; |
30e628b7 PB |
560 | return info; |
561 | } | |
32c81a4a PB |
562 | |
563 | static void block_job_iostatus_set_err(BlockJob *job, int error) | |
564 | { | |
565 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { | |
566 | job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : | |
567 | BLOCK_DEVICE_IO_STATUS_FAILED; | |
568 | } | |
569 | } | |
570 | ||
8254b6d9 | 571 | static void block_job_event_cancelled(BlockJob *job) |
bcada37b | 572 | { |
559b935f JS |
573 | if (block_job_is_internal(job)) { |
574 | return; | |
575 | } | |
576 | ||
bcada37b | 577 | qapi_event_send_block_job_cancelled(job->driver->job_type, |
8ccb9569 | 578 | job->id, |
bcada37b WX |
579 | job->len, |
580 | job->offset, | |
581 | job->speed, | |
582 | &error_abort); | |
583 | } | |
32c81a4a | 584 | |
8254b6d9 | 585 | static void block_job_event_completed(BlockJob *job, const char *msg) |
a66a2a36 | 586 | { |
559b935f JS |
587 | if (block_job_is_internal(job)) { |
588 | return; | |
589 | } | |
590 | ||
bcada37b | 591 | qapi_event_send_block_job_completed(job->driver->job_type, |
8ccb9569 | 592 | job->id, |
bcada37b WX |
593 | job->len, |
594 | job->offset, | |
595 | job->speed, | |
596 | !!msg, | |
597 | msg, | |
598 | &error_abort); | |
a66a2a36 PB |
599 | } |
600 | ||
bcada37b | 601 | void block_job_event_ready(BlockJob *job) |
a66a2a36 | 602 | { |
ef6dbf1e HR |
603 | job->ready = true; |
604 | ||
559b935f JS |
605 | if (block_job_is_internal(job)) { |
606 | return; | |
607 | } | |
608 | ||
518848a2 | 609 | qapi_event_send_block_job_ready(job->driver->job_type, |
8ccb9569 | 610 | job->id, |
518848a2 MA |
611 | job->len, |
612 | job->offset, | |
613 | job->speed, &error_abort); | |
a66a2a36 PB |
614 | } |
615 | ||
81e254dc | 616 | BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, |
32c81a4a PB |
617 | int is_read, int error) |
618 | { | |
619 | BlockErrorAction action; | |
620 | ||
621 | switch (on_err) { | |
622 | case BLOCKDEV_ON_ERROR_ENOSPC: | |
8c398252 | 623 | case BLOCKDEV_ON_ERROR_AUTO: |
a589569f WX |
624 | action = (error == ENOSPC) ? |
625 | BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; | |
32c81a4a PB |
626 | break; |
627 | case BLOCKDEV_ON_ERROR_STOP: | |
a589569f | 628 | action = BLOCK_ERROR_ACTION_STOP; |
32c81a4a PB |
629 | break; |
630 | case BLOCKDEV_ON_ERROR_REPORT: | |
a589569f | 631 | action = BLOCK_ERROR_ACTION_REPORT; |
32c81a4a PB |
632 | break; |
633 | case BLOCKDEV_ON_ERROR_IGNORE: | |
a589569f | 634 | action = BLOCK_ERROR_ACTION_IGNORE; |
32c81a4a PB |
635 | break; |
636 | default: | |
637 | abort(); | |
638 | } | |
559b935f JS |
639 | if (!block_job_is_internal(job)) { |
640 | qapi_event_send_block_job_error(job->id, | |
641 | is_read ? IO_OPERATION_TYPE_READ : | |
642 | IO_OPERATION_TYPE_WRITE, | |
643 | action, &error_abort); | |
644 | } | |
a589569f | 645 | if (action == BLOCK_ERROR_ACTION_STOP) { |
751ebd76 FZ |
646 | /* make the pause user visible, which will be resumed from QMP. */ |
647 | job->user_paused = true; | |
32c81a4a PB |
648 | block_job_pause(job); |
649 | block_job_iostatus_set_err(job, error); | |
32c81a4a PB |
650 | } |
651 | return action; | |
652 | } | |
dec7d421 SH |
653 | |
654 | typedef struct { | |
655 | BlockJob *job; | |
dec7d421 SH |
656 | AioContext *aio_context; |
657 | BlockJobDeferToMainLoopFn *fn; | |
658 | void *opaque; | |
659 | } BlockJobDeferToMainLoopData; | |
660 | ||
661 | static void block_job_defer_to_main_loop_bh(void *opaque) | |
662 | { | |
663 | BlockJobDeferToMainLoopData *data = opaque; | |
664 | AioContext *aio_context; | |
665 | ||
dec7d421 SH |
666 | /* Prevent race with block_job_defer_to_main_loop() */ |
667 | aio_context_acquire(data->aio_context); | |
668 | ||
669 | /* Fetch BDS AioContext again, in case it has changed */ | |
b6d2e599 | 670 | aio_context = blk_get_aio_context(data->job->blk); |
dec7d421 SH |
671 | aio_context_acquire(aio_context); |
672 | ||
794f0141 | 673 | data->job->deferred_to_main_loop = false; |
dec7d421 SH |
674 | data->fn(data->job, data->opaque); |
675 | ||
676 | aio_context_release(aio_context); | |
677 | ||
678 | aio_context_release(data->aio_context); | |
679 | ||
680 | g_free(data); | |
681 | } | |
682 | ||
683 | void block_job_defer_to_main_loop(BlockJob *job, | |
684 | BlockJobDeferToMainLoopFn *fn, | |
685 | void *opaque) | |
686 | { | |
687 | BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data)); | |
688 | data->job = job; | |
b6d2e599 | 689 | data->aio_context = blk_get_aio_context(job->blk); |
dec7d421 SH |
690 | data->fn = fn; |
691 | data->opaque = opaque; | |
794f0141 | 692 | job->deferred_to_main_loop = true; |
dec7d421 | 693 | |
fffb6e12 PB |
694 | aio_bh_schedule_oneshot(qemu_get_aio_context(), |
695 | block_job_defer_to_main_loop_bh, data); | |
dec7d421 | 696 | } |
c55a832f FZ |
697 | |
698 | BlockJobTxn *block_job_txn_new(void) | |
699 | { | |
700 | BlockJobTxn *txn = g_new0(BlockJobTxn, 1); | |
701 | QLIST_INIT(&txn->jobs); | |
702 | txn->refcnt = 1; | |
703 | return txn; | |
704 | } | |
705 | ||
706 | static void block_job_txn_ref(BlockJobTxn *txn) | |
707 | { | |
708 | txn->refcnt++; | |
709 | } | |
710 | ||
711 | void block_job_txn_unref(BlockJobTxn *txn) | |
712 | { | |
713 | if (txn && --txn->refcnt == 0) { | |
714 | g_free(txn); | |
715 | } | |
716 | } | |
717 | ||
718 | void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job) | |
719 | { | |
720 | if (!txn) { | |
721 | return; | |
722 | } | |
723 | ||
724 | assert(!job->txn); | |
725 | job->txn = txn; | |
726 | ||
727 | QLIST_INSERT_HEAD(&txn->jobs, job, txn_list); | |
728 | block_job_txn_ref(txn); | |
729 | } |