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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 | 27 | #include "qemu-common.h" |
737e150e | 28 | #include "block/block.h" |
c87621ea | 29 | #include "block/blockjob_int.h" |
737e150e | 30 | #include "block/block_int.h" |
c9de4050 | 31 | #include "block/trace.h" |
373340b2 | 32 | #include "sysemu/block-backend.h" |
e688df6b | 33 | #include "qapi/error.h" |
9af23989 | 34 | #include "qapi/qapi-events-block-core.h" |
cc7a8ea7 | 35 | #include "qapi/qmp/qerror.h" |
10817bf0 | 36 | #include "qemu/coroutine.h" |
1de7afc9 | 37 | #include "qemu/timer.h" |
2f0c9fe6 | 38 | |
88691b37 PB |
39 | /* |
40 | * The block job API is composed of two categories of functions. | |
41 | * | |
42 | * The first includes functions used by the monitor. The monitor is | |
43 | * peculiar in that it accesses the block job list with block_job_get, and | |
44 | * therefore needs consistency across block_job_get and the actual operation | |
45 | * (e.g. block_job_set_speed). The consistency is achieved with | |
46 | * aio_context_acquire/release. These functions are declared in blockjob.h. | |
47 | * | |
48 | * The second includes functions used by the block job drivers and sometimes | |
49 | * by the core block layer. These do not care about locking, because the | |
50 | * whole coroutine runs under the AioContext lock, and are declared in | |
51 | * blockjob_int.h. | |
52 | */ | |
53 | ||
e7c1d78b | 54 | static bool is_block_job(Job *job) |
a7112795 | 55 | { |
e7c1d78b KW |
56 | return job_type(job) == JOB_TYPE_BACKUP || |
57 | job_type(job) == JOB_TYPE_COMMIT || | |
58 | job_type(job) == JOB_TYPE_MIRROR || | |
59 | job_type(job) == JOB_TYPE_STREAM; | |
60 | } | |
61 | ||
62 | BlockJob *block_job_next(BlockJob *bjob) | |
63 | { | |
64 | Job *job = bjob ? &bjob->job : NULL; | |
65 | ||
66 | do { | |
67 | job = job_next(job); | |
68 | } while (job && !is_block_job(job)); | |
69 | ||
70 | return job ? container_of(job, BlockJob, job) : NULL; | |
a7112795 AG |
71 | } |
72 | ||
ffb1f10c AG |
73 | BlockJob *block_job_get(const char *id) |
74 | { | |
e7c1d78b | 75 | Job *job = job_get(id); |
ffb1f10c | 76 | |
e7c1d78b KW |
77 | if (job && is_block_job(job)) { |
78 | return container_of(job, BlockJob, job); | |
79 | } else { | |
80 | return NULL; | |
ffb1f10c | 81 | } |
ffb1f10c AG |
82 | } |
83 | ||
05b0d8e3 PB |
84 | static void block_job_attached_aio_context(AioContext *new_context, |
85 | void *opaque); | |
86 | static void block_job_detach_aio_context(void *opaque); | |
87 | ||
80fa2c75 | 88 | void block_job_free(Job *job) |
05b0d8e3 | 89 | { |
80fa2c75 KW |
90 | BlockJob *bjob = container_of(job, BlockJob, job); |
91 | BlockDriverState *bs = blk_bs(bjob->blk); | |
92 | ||
80fa2c75 KW |
93 | bs->job = NULL; |
94 | block_job_remove_all_bdrv(bjob); | |
95 | blk_remove_aio_context_notifier(bjob->blk, | |
96 | block_job_attached_aio_context, | |
97 | block_job_detach_aio_context, bjob); | |
98 | blk_unref(bjob->blk); | |
99 | error_free(bjob->blocker); | |
05b0d8e3 PB |
100 | } |
101 | ||
463e0be1 SH |
102 | static void block_job_attached_aio_context(AioContext *new_context, |
103 | void *opaque) | |
104 | { | |
105 | BlockJob *job = opaque; | |
106 | ||
08be6fe2 | 107 | job->job.aio_context = new_context; |
463e0be1 SH |
108 | if (job->driver->attached_aio_context) { |
109 | job->driver->attached_aio_context(job, new_context); | |
110 | } | |
111 | ||
b15de828 | 112 | job_resume(&job->job); |
463e0be1 SH |
113 | } |
114 | ||
b69f777d | 115 | void block_job_drain(Job *job) |
bae8196d | 116 | { |
b69f777d | 117 | BlockJob *bjob = container_of(job, BlockJob, job); |
bae8196d | 118 | |
b69f777d KW |
119 | blk_drain(bjob->blk); |
120 | if (bjob->driver->drain) { | |
121 | bjob->driver->drain(bjob); | |
bae8196d PB |
122 | } |
123 | } | |
124 | ||
463e0be1 SH |
125 | static void block_job_detach_aio_context(void *opaque) |
126 | { | |
127 | BlockJob *job = opaque; | |
128 | ||
129 | /* In case the job terminates during aio_poll()... */ | |
80fa2c75 | 130 | job_ref(&job->job); |
463e0be1 | 131 | |
b15de828 | 132 | job_pause(&job->job); |
463e0be1 | 133 | |
dbe5e6c1 | 134 | while (!job->job.paused && !job_is_completed(&job->job)) { |
b69f777d | 135 | job_drain(&job->job); |
463e0be1 SH |
136 | } |
137 | ||
08be6fe2 | 138 | job->job.aio_context = NULL; |
80fa2c75 | 139 | job_unref(&job->job); |
463e0be1 SH |
140 | } |
141 | ||
f321dcb5 PB |
142 | static char *child_job_get_parent_desc(BdrvChild *c) |
143 | { | |
144 | BlockJob *job = c->opaque; | |
252291ea | 145 | return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); |
f321dcb5 PB |
146 | } |
147 | ||
ad90feba | 148 | static void child_job_drained_begin(BdrvChild *c) |
f321dcb5 | 149 | { |
ad90feba | 150 | BlockJob *job = c->opaque; |
b15de828 | 151 | job_pause(&job->job); |
f321dcb5 PB |
152 | } |
153 | ||
ad90feba | 154 | static void child_job_drained_end(BdrvChild *c) |
f321dcb5 | 155 | { |
ad90feba | 156 | BlockJob *job = c->opaque; |
b15de828 | 157 | job_resume(&job->job); |
f321dcb5 PB |
158 | } |
159 | ||
ad90feba KW |
160 | static const BdrvChildRole child_job = { |
161 | .get_parent_desc = child_job_get_parent_desc, | |
162 | .drained_begin = child_job_drained_begin, | |
163 | .drained_end = child_job_drained_end, | |
164 | .stay_at_node = true, | |
f321dcb5 PB |
165 | }; |
166 | ||
bbc02b90 KW |
167 | void block_job_remove_all_bdrv(BlockJob *job) |
168 | { | |
169 | GSList *l; | |
170 | for (l = job->nodes; l; l = l->next) { | |
171 | BdrvChild *c = l->data; | |
172 | bdrv_op_unblock_all(c->bs, job->blocker); | |
173 | bdrv_root_unref_child(c); | |
174 | } | |
175 | g_slist_free(job->nodes); | |
176 | job->nodes = NULL; | |
177 | } | |
178 | ||
76d554e2 KW |
179 | int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, |
180 | uint64_t perm, uint64_t shared_perm, Error **errp) | |
23d402d4 | 181 | { |
76d554e2 KW |
182 | BdrvChild *c; |
183 | ||
184 | c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, | |
185 | job, errp); | |
186 | if (c == NULL) { | |
187 | return -EPERM; | |
188 | } | |
189 | ||
190 | job->nodes = g_slist_prepend(job->nodes, c); | |
23d402d4 AG |
191 | bdrv_ref(bs); |
192 | bdrv_op_block_all(bs, job->blocker); | |
76d554e2 KW |
193 | |
194 | return 0; | |
23d402d4 AG |
195 | } |
196 | ||
559b935f JS |
197 | bool block_job_is_internal(BlockJob *job) |
198 | { | |
33e9e9bd | 199 | return (job->job.id == NULL); |
559b935f JS |
200 | } |
201 | ||
bd21935b KW |
202 | const BlockJobDriver *block_job_driver(BlockJob *job) |
203 | { | |
204 | return job->driver; | |
205 | } | |
206 | ||
da01ff7f KW |
207 | /* Assumes the job_mutex is held */ |
208 | static bool job_timer_pending(Job *job) | |
209 | { | |
210 | return timer_pending(&job->sleep_timer); | |
211 | } | |
212 | ||
2f0c9fe6 PB |
213 | void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) |
214 | { | |
aa9ef2e6 | 215 | int64_t old_speed = job->speed; |
2f0c9fe6 | 216 | |
a50c2ab8 | 217 | if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { |
0ec4dfb8 JS |
218 | return; |
219 | } | |
18bb6928 KW |
220 | if (speed < 0) { |
221 | error_setg(errp, QERR_INVALID_PARAMETER, "speed"); | |
2f0c9fe6 PB |
222 | return; |
223 | } | |
224 | ||
18bb6928 KW |
225 | ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); |
226 | ||
2f0c9fe6 | 227 | job->speed = speed; |
d4fce188 | 228 | if (speed && speed <= old_speed) { |
aa9ef2e6 JS |
229 | return; |
230 | } | |
231 | ||
232 | /* kick only if a timer is pending */ | |
da01ff7f | 233 | job_enter_cond(&job->job, job_timer_pending); |
2f0c9fe6 PB |
234 | } |
235 | ||
dee81d51 KW |
236 | int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) |
237 | { | |
238 | if (!job->speed) { | |
239 | return 0; | |
240 | } | |
241 | ||
242 | return ratelimit_calculate_delay(&job->limit, n); | |
243 | } | |
244 | ||
75f71059 JS |
245 | void block_job_dismiss(BlockJob **jobptr, Error **errp) |
246 | { | |
247 | BlockJob *job = *jobptr; | |
248 | /* similarly to _complete, this is QMP-interface only. */ | |
33e9e9bd | 249 | assert(job->job.id); |
a50c2ab8 | 250 | if (job_apply_verb(&job->job, JOB_VERB_DISMISS, errp)) { |
75f71059 JS |
251 | return; |
252 | } | |
253 | ||
4ad35181 | 254 | job_do_dismiss(&job->job); |
75f71059 JS |
255 | *jobptr = NULL; |
256 | } | |
257 | ||
b76e4458 | 258 | void block_job_cancel(BlockJob *job, bool force) |
8acc72a4 | 259 | { |
a50c2ab8 | 260 | if (job->job.status == JOB_STATUS_CONCLUDED) { |
4ad35181 | 261 | job_do_dismiss(&job->job); |
11b61fbc JS |
262 | return; |
263 | } | |
004e95df | 264 | job_cancel_async(&job->job, force); |
da01ff7f | 265 | if (!job_started(&job->job)) { |
5ccac6f1 | 266 | block_job_completed(job, -ECANCELED); |
1908a559 | 267 | } else if (job->job.deferred_to_main_loop) { |
7eaa8fb5 | 268 | job_completed_txn_abort(&job->job); |
11b61fbc JS |
269 | } else { |
270 | block_job_enter(job); | |
5ccac6f1 | 271 | } |
8acc72a4 PB |
272 | } |
273 | ||
b76e4458 | 274 | void block_job_user_cancel(BlockJob *job, bool force, Error **errp) |
0ec4dfb8 | 275 | { |
a50c2ab8 | 276 | if (job_apply_verb(&job->job, JOB_VERB_CANCEL, errp)) { |
0ec4dfb8 JS |
277 | return; |
278 | } | |
b76e4458 | 279 | block_job_cancel(job, force); |
0ec4dfb8 JS |
280 | } |
281 | ||
345f9e1b | 282 | /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be |
6a74c075 KW |
283 | * used with job_finish_sync() without the need for (rather nasty) function |
284 | * pointer casts there. */ | |
285 | static void block_job_cancel_err(Job *job, Error **errp) | |
345f9e1b | 286 | { |
6a74c075 KW |
287 | BlockJob *bjob = container_of(job, BlockJob, job); |
288 | assert(is_block_job(job)); | |
289 | block_job_cancel(bjob, false); | |
345f9e1b HR |
290 | } |
291 | ||
292 | int block_job_cancel_sync(BlockJob *job) | |
293 | { | |
6a74c075 | 294 | return job_finish_sync(&job->job, &block_job_cancel_err, NULL); |
345f9e1b HR |
295 | } |
296 | ||
a1a2af07 KW |
297 | void block_job_cancel_sync_all(void) |
298 | { | |
299 | BlockJob *job; | |
300 | AioContext *aio_context; | |
301 | ||
e7c1d78b | 302 | while ((job = block_job_next(NULL))) { |
b6d2e599 | 303 | aio_context = blk_get_aio_context(job->blk); |
a1a2af07 KW |
304 | aio_context_acquire(aio_context); |
305 | block_job_cancel_sync(job); | |
306 | aio_context_release(aio_context); | |
307 | } | |
308 | } | |
309 | ||
345f9e1b HR |
310 | int block_job_complete_sync(BlockJob *job, Error **errp) |
311 | { | |
6a74c075 | 312 | return job_finish_sync(&job->job, job_complete, errp); |
345f9e1b HR |
313 | } |
314 | ||
05df8a6a KW |
315 | void block_job_progress_update(BlockJob *job, uint64_t done) |
316 | { | |
317 | job->offset += done; | |
318 | } | |
319 | ||
320 | void block_job_progress_set_remaining(BlockJob *job, uint64_t remaining) | |
321 | { | |
322 | job->len = job->offset + remaining; | |
323 | } | |
324 | ||
559b935f | 325 | BlockJobInfo *block_job_query(BlockJob *job, Error **errp) |
30e628b7 | 326 | { |
559b935f JS |
327 | BlockJobInfo *info; |
328 | ||
329 | if (block_job_is_internal(job)) { | |
330 | error_setg(errp, "Cannot query QEMU internal jobs"); | |
331 | return NULL; | |
332 | } | |
333 | info = g_new0(BlockJobInfo, 1); | |
252291ea | 334 | info->type = g_strdup(job_type_str(&job->job)); |
33e9e9bd | 335 | info->device = g_strdup(job->job.id); |
32c81a4a | 336 | info->len = job->len; |
da01ff7f KW |
337 | info->busy = atomic_read(&job->job.busy); |
338 | info->paused = job->job.pause_count > 0; | |
32c81a4a PB |
339 | info->offset = job->offset; |
340 | info->speed = job->speed; | |
341 | info->io_status = job->iostatus; | |
ef6dbf1e | 342 | info->ready = job->ready; |
a50c2ab8 | 343 | info->status = job->job.status; |
bb02b65c KW |
344 | info->auto_finalize = job->job.auto_finalize; |
345 | info->auto_dismiss = job->job.auto_dismiss; | |
4ad35181 KW |
346 | info->has_error = job->job.ret != 0; |
347 | info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; | |
30e628b7 PB |
348 | return info; |
349 | } | |
32c81a4a PB |
350 | |
351 | static void block_job_iostatus_set_err(BlockJob *job, int error) | |
352 | { | |
353 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { | |
354 | job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : | |
355 | BLOCK_DEVICE_IO_STATUS_FAILED; | |
356 | } | |
357 | } | |
358 | ||
139a9f02 | 359 | static void block_job_event_cancelled(Notifier *n, void *opaque) |
bcada37b | 360 | { |
139a9f02 KW |
361 | BlockJob *job = opaque; |
362 | ||
559b935f JS |
363 | if (block_job_is_internal(job)) { |
364 | return; | |
365 | } | |
366 | ||
252291ea | 367 | qapi_event_send_block_job_cancelled(job_type(&job->job), |
33e9e9bd | 368 | job->job.id, |
bcada37b WX |
369 | job->len, |
370 | job->offset, | |
371 | job->speed, | |
372 | &error_abort); | |
373 | } | |
32c81a4a | 374 | |
139a9f02 | 375 | static void block_job_event_completed(Notifier *n, void *opaque) |
a66a2a36 | 376 | { |
139a9f02 KW |
377 | BlockJob *job = opaque; |
378 | const char *msg = NULL; | |
379 | ||
559b935f JS |
380 | if (block_job_is_internal(job)) { |
381 | return; | |
382 | } | |
383 | ||
4ad35181 KW |
384 | if (job->job.ret < 0) { |
385 | msg = strerror(-job->job.ret); | |
139a9f02 KW |
386 | } |
387 | ||
252291ea | 388 | qapi_event_send_block_job_completed(job_type(&job->job), |
33e9e9bd | 389 | job->job.id, |
bcada37b WX |
390 | job->len, |
391 | job->offset, | |
392 | job->speed, | |
393 | !!msg, | |
394 | msg, | |
395 | &error_abort); | |
a66a2a36 PB |
396 | } |
397 | ||
139a9f02 | 398 | static void block_job_event_pending(Notifier *n, void *opaque) |
5f241594 | 399 | { |
139a9f02 KW |
400 | BlockJob *job = opaque; |
401 | ||
5d4f3769 KW |
402 | if (block_job_is_internal(job)) { |
403 | return; | |
5f241594 | 404 | } |
5d4f3769 KW |
405 | |
406 | qapi_event_send_block_job_pending(job_type(&job->job), | |
407 | job->job.id, | |
408 | &error_abort); | |
5f241594 JS |
409 | } |
410 | ||
88691b37 PB |
411 | /* |
412 | * API for block job drivers and the block layer. These functions are | |
413 | * declared in blockjob_int.h. | |
414 | */ | |
415 | ||
416 | void *block_job_create(const char *job_id, const BlockJobDriver *driver, | |
62c9e416 | 417 | JobTxn *txn, BlockDriverState *bs, uint64_t perm, |
88691b37 PB |
418 | uint64_t shared_perm, int64_t speed, int flags, |
419 | BlockCompletionFunc *cb, void *opaque, Error **errp) | |
420 | { | |
421 | BlockBackend *blk; | |
422 | BlockJob *job; | |
423 | int ret; | |
424 | ||
425 | if (bs->job) { | |
426 | error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
427 | return NULL; | |
428 | } | |
429 | ||
bb02b65c | 430 | if (job_id == NULL && !(flags & JOB_INTERNAL)) { |
88691b37 | 431 | job_id = bdrv_get_device_name(bs); |
88691b37 PB |
432 | } |
433 | ||
434 | blk = blk_new(perm, shared_perm); | |
435 | ret = blk_insert_bs(blk, bs, errp); | |
436 | if (ret < 0) { | |
437 | blk_unref(blk); | |
438 | return NULL; | |
439 | } | |
440 | ||
7eaa8fb5 | 441 | job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), |
4ad35181 | 442 | flags, cb, opaque, errp); |
33e9e9bd KW |
443 | if (job == NULL) { |
444 | blk_unref(blk); | |
445 | return NULL; | |
446 | } | |
447 | ||
e7c1d78b | 448 | assert(is_block_job(&job->job)); |
80fa2c75 | 449 | assert(job->job.driver->free == &block_job_free); |
b15de828 | 450 | assert(job->job.driver->user_resume == &block_job_user_resume); |
b69f777d | 451 | assert(job->job.driver->drain == &block_job_drain); |
e7c1d78b | 452 | |
88691b37 | 453 | job->driver = driver; |
88691b37 | 454 | job->blk = blk; |
88691b37 | 455 | |
139a9f02 KW |
456 | job->finalize_cancelled_notifier.notify = block_job_event_cancelled; |
457 | job->finalize_completed_notifier.notify = block_job_event_completed; | |
458 | job->pending_notifier.notify = block_job_event_pending; | |
459 | ||
460 | notifier_list_add(&job->job.on_finalize_cancelled, | |
461 | &job->finalize_cancelled_notifier); | |
462 | notifier_list_add(&job->job.on_finalize_completed, | |
463 | &job->finalize_completed_notifier); | |
464 | notifier_list_add(&job->job.on_pending, &job->pending_notifier); | |
465 | ||
88691b37 | 466 | error_setg(&job->blocker, "block device is in use by block job: %s", |
252291ea | 467 | job_type_str(&job->job)); |
88691b37 PB |
468 | block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); |
469 | bs->job = job; | |
470 | ||
88691b37 PB |
471 | bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); |
472 | ||
88691b37 PB |
473 | blk_add_aio_context_notifier(blk, block_job_attached_aio_context, |
474 | block_job_detach_aio_context, job); | |
475 | ||
476 | /* Only set speed when necessary to avoid NotSupported error */ | |
477 | if (speed != 0) { | |
478 | Error *local_err = NULL; | |
479 | ||
480 | block_job_set_speed(job, speed, &local_err); | |
481 | if (local_err) { | |
4ad35181 | 482 | job_early_fail(&job->job); |
88691b37 PB |
483 | error_propagate(errp, local_err); |
484 | return NULL; | |
485 | } | |
486 | } | |
75859b94 | 487 | |
88691b37 PB |
488 | return job; |
489 | } | |
490 | ||
88691b37 PB |
491 | void block_job_completed(BlockJob *job, int ret) |
492 | { | |
7eaa8fb5 | 493 | assert(job && job->job.txn && !job_is_completed(&job->job)); |
88691b37 | 494 | assert(blk_bs(job->blk)->job == job); |
4ad35181 KW |
495 | job->job.ret = ret; |
496 | job_update_rc(&job->job); | |
497 | trace_block_job_completed(job, ret, job->job.ret); | |
498 | if (job->job.ret) { | |
7eaa8fb5 | 499 | job_completed_txn_abort(&job->job); |
88691b37 | 500 | } else { |
7eaa8fb5 | 501 | job_completed_txn_success(&job->job); |
88691b37 PB |
502 | } |
503 | } | |
504 | ||
aa9ef2e6 JS |
505 | void block_job_enter(BlockJob *job) |
506 | { | |
da01ff7f | 507 | job_enter_cond(&job->job, NULL); |
aa9ef2e6 JS |
508 | } |
509 | ||
88691b37 PB |
510 | void block_job_yield(BlockJob *job) |
511 | { | |
da01ff7f | 512 | assert(job->job.busy); |
88691b37 PB |
513 | |
514 | /* Check cancellation *before* setting busy = false, too! */ | |
daa7f2f9 | 515 | if (job_is_cancelled(&job->job)) { |
88691b37 PB |
516 | return; |
517 | } | |
518 | ||
da01ff7f KW |
519 | if (!job_should_pause(&job->job)) { |
520 | job_do_yield(&job->job, -1); | |
88691b37 | 521 | } |
88691b37 | 522 | |
da01ff7f | 523 | job_pause_point(&job->job); |
88691b37 PB |
524 | } |
525 | ||
2caf63a9 PB |
526 | void block_job_iostatus_reset(BlockJob *job) |
527 | { | |
4c241cf5 PB |
528 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { |
529 | return; | |
530 | } | |
b15de828 | 531 | assert(job->job.user_paused && job->job.pause_count > 0); |
2caf63a9 PB |
532 | job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; |
533 | } | |
534 | ||
b15de828 KW |
535 | void block_job_user_resume(Job *job) |
536 | { | |
537 | BlockJob *bjob = container_of(job, BlockJob, job); | |
538 | block_job_iostatus_reset(bjob); | |
539 | } | |
540 | ||
bcada37b | 541 | void block_job_event_ready(BlockJob *job) |
a66a2a36 | 542 | { |
a50c2ab8 | 543 | job_state_transition(&job->job, JOB_STATUS_READY); |
ef6dbf1e HR |
544 | job->ready = true; |
545 | ||
559b935f JS |
546 | if (block_job_is_internal(job)) { |
547 | return; | |
548 | } | |
549 | ||
252291ea | 550 | qapi_event_send_block_job_ready(job_type(&job->job), |
33e9e9bd | 551 | job->job.id, |
518848a2 MA |
552 | job->len, |
553 | job->offset, | |
554 | job->speed, &error_abort); | |
a66a2a36 PB |
555 | } |
556 | ||
81e254dc | 557 | BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, |
32c81a4a PB |
558 | int is_read, int error) |
559 | { | |
560 | BlockErrorAction action; | |
561 | ||
562 | switch (on_err) { | |
563 | case BLOCKDEV_ON_ERROR_ENOSPC: | |
8c398252 | 564 | case BLOCKDEV_ON_ERROR_AUTO: |
a589569f WX |
565 | action = (error == ENOSPC) ? |
566 | BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; | |
32c81a4a PB |
567 | break; |
568 | case BLOCKDEV_ON_ERROR_STOP: | |
a589569f | 569 | action = BLOCK_ERROR_ACTION_STOP; |
32c81a4a PB |
570 | break; |
571 | case BLOCKDEV_ON_ERROR_REPORT: | |
a589569f | 572 | action = BLOCK_ERROR_ACTION_REPORT; |
32c81a4a PB |
573 | break; |
574 | case BLOCKDEV_ON_ERROR_IGNORE: | |
a589569f | 575 | action = BLOCK_ERROR_ACTION_IGNORE; |
32c81a4a PB |
576 | break; |
577 | default: | |
578 | abort(); | |
579 | } | |
559b935f | 580 | if (!block_job_is_internal(job)) { |
33e9e9bd | 581 | qapi_event_send_block_job_error(job->job.id, |
559b935f JS |
582 | is_read ? IO_OPERATION_TYPE_READ : |
583 | IO_OPERATION_TYPE_WRITE, | |
584 | action, &error_abort); | |
585 | } | |
a589569f | 586 | if (action == BLOCK_ERROR_ACTION_STOP) { |
b15de828 | 587 | job_pause(&job->job); |
751ebd76 | 588 | /* make the pause user visible, which will be resumed from QMP. */ |
b15de828 | 589 | job->job.user_paused = true; |
32c81a4a | 590 | block_job_iostatus_set_err(job, error); |
32c81a4a PB |
591 | } |
592 | return action; | |
593 | } |