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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" |
7f0317cf | 37 | #include "qemu/id.h" |
1de7afc9 | 38 | #include "qemu/timer.h" |
2f0c9fe6 | 39 | |
fc24908e PB |
40 | /* Right now, this mutex is only needed to synchronize accesses to job->busy |
41 | * and job->sleep_timer, such as concurrent calls to block_job_do_yield and | |
42 | * block_job_enter. */ | |
43 | static QemuMutex block_job_mutex; | |
44 | ||
c9de4050 JS |
45 | /* BlockJob State Transition Table */ |
46 | bool BlockJobSTT[BLOCK_JOB_STATUS__MAX][BLOCK_JOB_STATUS__MAX] = { | |
3925cd3b JS |
47 | /* U, C, R, P, Y, S, X, E, N */ |
48 | /* U: */ [BLOCK_JOB_STATUS_UNDEFINED] = {0, 1, 0, 0, 0, 0, 0, 0, 0}, | |
49 | /* C: */ [BLOCK_JOB_STATUS_CREATED] = {0, 0, 1, 0, 0, 0, 1, 0, 1}, | |
50 | /* R: */ [BLOCK_JOB_STATUS_RUNNING] = {0, 0, 0, 1, 1, 0, 1, 1, 0}, | |
51 | /* P: */ [BLOCK_JOB_STATUS_PAUSED] = {0, 0, 1, 0, 0, 0, 0, 0, 0}, | |
52 | /* Y: */ [BLOCK_JOB_STATUS_READY] = {0, 0, 0, 0, 0, 1, 1, 1, 0}, | |
53 | /* S: */ [BLOCK_JOB_STATUS_STANDBY] = {0, 0, 0, 0, 1, 0, 0, 0, 0}, | |
35d6b368 | 54 | /* X: */ [BLOCK_JOB_STATUS_ABORTING] = {0, 0, 0, 0, 0, 0, 1, 1, 0}, |
3925cd3b JS |
55 | /* E: */ [BLOCK_JOB_STATUS_CONCLUDED] = {0, 0, 0, 0, 0, 0, 0, 0, 1}, |
56 | /* N: */ [BLOCK_JOB_STATUS_NULL] = {0, 0, 0, 0, 0, 0, 0, 0, 0}, | |
c9de4050 JS |
57 | }; |
58 | ||
0ec4dfb8 | 59 | bool BlockJobVerbTable[BLOCK_JOB_VERB__MAX][BLOCK_JOB_STATUS__MAX] = { |
3925cd3b JS |
60 | /* U, C, R, P, Y, S, X, E, N */ |
61 | [BLOCK_JOB_VERB_CANCEL] = {0, 1, 1, 1, 1, 1, 0, 0, 0}, | |
62 | [BLOCK_JOB_VERB_PAUSE] = {0, 1, 1, 1, 1, 1, 0, 0, 0}, | |
63 | [BLOCK_JOB_VERB_RESUME] = {0, 1, 1, 1, 1, 1, 0, 0, 0}, | |
64 | [BLOCK_JOB_VERB_SET_SPEED] = {0, 1, 1, 1, 1, 1, 0, 0, 0}, | |
65 | [BLOCK_JOB_VERB_COMPLETE] = {0, 0, 0, 0, 1, 0, 0, 0, 0}, | |
75f71059 | 66 | [BLOCK_JOB_VERB_DISMISS] = {0, 0, 0, 0, 0, 0, 0, 1, 0}, |
0ec4dfb8 JS |
67 | }; |
68 | ||
c9de4050 JS |
69 | static void block_job_state_transition(BlockJob *job, BlockJobStatus s1) |
70 | { | |
71 | BlockJobStatus s0 = job->status; | |
72 | assert(s1 >= 0 && s1 <= BLOCK_JOB_STATUS__MAX); | |
73 | trace_block_job_state_transition(job, job->ret, BlockJobSTT[s0][s1] ? | |
74 | "allowed" : "disallowed", | |
75 | qapi_enum_lookup(&BlockJobStatus_lookup, | |
76 | s0), | |
77 | qapi_enum_lookup(&BlockJobStatus_lookup, | |
78 | s1)); | |
79 | assert(BlockJobSTT[s0][s1]); | |
80 | job->status = s1; | |
81 | } | |
82 | ||
0ec4dfb8 JS |
83 | static int block_job_apply_verb(BlockJob *job, BlockJobVerb bv, Error **errp) |
84 | { | |
85 | assert(bv >= 0 && bv <= BLOCK_JOB_VERB__MAX); | |
86 | trace_block_job_apply_verb(job, qapi_enum_lookup(&BlockJobStatus_lookup, | |
87 | job->status), | |
88 | qapi_enum_lookup(&BlockJobVerb_lookup, bv), | |
89 | BlockJobVerbTable[bv][job->status] ? | |
90 | "allowed" : "prohibited"); | |
91 | if (BlockJobVerbTable[bv][job->status]) { | |
92 | return 0; | |
93 | } | |
94 | error_setg(errp, "Job '%s' in state '%s' cannot accept command verb '%s'", | |
95 | job->id, qapi_enum_lookup(&BlockJobStatus_lookup, job->status), | |
96 | qapi_enum_lookup(&BlockJobVerb_lookup, bv)); | |
97 | return -EPERM; | |
98 | } | |
99 | ||
fc24908e PB |
100 | static void block_job_lock(void) |
101 | { | |
102 | qemu_mutex_lock(&block_job_mutex); | |
103 | } | |
104 | ||
105 | static void block_job_unlock(void) | |
106 | { | |
107 | qemu_mutex_unlock(&block_job_mutex); | |
108 | } | |
109 | ||
110 | static void __attribute__((__constructor__)) block_job_init(void) | |
111 | { | |
112 | qemu_mutex_init(&block_job_mutex); | |
113 | } | |
114 | ||
8254b6d9 JS |
115 | static void block_job_event_cancelled(BlockJob *job); |
116 | static void block_job_event_completed(BlockJob *job, const char *msg); | |
aa9ef2e6 | 117 | static void block_job_enter_cond(BlockJob *job, bool(*fn)(BlockJob *job)); |
8254b6d9 | 118 | |
c55a832f FZ |
119 | /* Transactional group of block jobs */ |
120 | struct BlockJobTxn { | |
121 | ||
122 | /* Is this txn being cancelled? */ | |
123 | bool aborting; | |
124 | ||
125 | /* List of jobs */ | |
126 | QLIST_HEAD(, BlockJob) jobs; | |
127 | ||
128 | /* Reference count */ | |
129 | int refcnt; | |
130 | }; | |
131 | ||
a7112795 AG |
132 | static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs); |
133 | ||
88691b37 PB |
134 | /* |
135 | * The block job API is composed of two categories of functions. | |
136 | * | |
137 | * The first includes functions used by the monitor. The monitor is | |
138 | * peculiar in that it accesses the block job list with block_job_get, and | |
139 | * therefore needs consistency across block_job_get and the actual operation | |
140 | * (e.g. block_job_set_speed). The consistency is achieved with | |
141 | * aio_context_acquire/release. These functions are declared in blockjob.h. | |
142 | * | |
143 | * The second includes functions used by the block job drivers and sometimes | |
144 | * by the core block layer. These do not care about locking, because the | |
145 | * whole coroutine runs under the AioContext lock, and are declared in | |
146 | * blockjob_int.h. | |
147 | */ | |
148 | ||
a7112795 AG |
149 | BlockJob *block_job_next(BlockJob *job) |
150 | { | |
151 | if (!job) { | |
152 | return QLIST_FIRST(&block_jobs); | |
153 | } | |
154 | return QLIST_NEXT(job, job_list); | |
155 | } | |
156 | ||
ffb1f10c AG |
157 | BlockJob *block_job_get(const char *id) |
158 | { | |
159 | BlockJob *job; | |
160 | ||
161 | QLIST_FOREACH(job, &block_jobs, job_list) { | |
559b935f | 162 | if (job->id && !strcmp(id, job->id)) { |
ffb1f10c AG |
163 | return job; |
164 | } | |
165 | } | |
166 | ||
167 | return NULL; | |
168 | } | |
169 | ||
c8ab5c2d PB |
170 | BlockJobTxn *block_job_txn_new(void) |
171 | { | |
172 | BlockJobTxn *txn = g_new0(BlockJobTxn, 1); | |
173 | QLIST_INIT(&txn->jobs); | |
174 | txn->refcnt = 1; | |
175 | return txn; | |
176 | } | |
177 | ||
178 | static void block_job_txn_ref(BlockJobTxn *txn) | |
179 | { | |
180 | txn->refcnt++; | |
181 | } | |
182 | ||
183 | void block_job_txn_unref(BlockJobTxn *txn) | |
184 | { | |
185 | if (txn && --txn->refcnt == 0) { | |
186 | g_free(txn); | |
187 | } | |
188 | } | |
189 | ||
190 | void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job) | |
191 | { | |
192 | if (!txn) { | |
193 | return; | |
194 | } | |
195 | ||
196 | assert(!job->txn); | |
197 | job->txn = txn; | |
198 | ||
199 | QLIST_INSERT_HEAD(&txn->jobs, job, txn_list); | |
200 | block_job_txn_ref(txn); | |
201 | } | |
202 | ||
f321dcb5 PB |
203 | static void block_job_pause(BlockJob *job) |
204 | { | |
205 | job->pause_count++; | |
206 | } | |
207 | ||
208 | static void block_job_resume(BlockJob *job) | |
209 | { | |
210 | assert(job->pause_count > 0); | |
211 | job->pause_count--; | |
212 | if (job->pause_count) { | |
213 | return; | |
214 | } | |
215 | block_job_enter(job); | |
216 | } | |
217 | ||
4172a003 | 218 | void block_job_ref(BlockJob *job) |
05b0d8e3 PB |
219 | { |
220 | ++job->refcnt; | |
221 | } | |
222 | ||
223 | static void block_job_attached_aio_context(AioContext *new_context, | |
224 | void *opaque); | |
225 | static void block_job_detach_aio_context(void *opaque); | |
226 | ||
4172a003 | 227 | void block_job_unref(BlockJob *job) |
05b0d8e3 PB |
228 | { |
229 | if (--job->refcnt == 0) { | |
3925cd3b | 230 | assert(job->status == BLOCK_JOB_STATUS_NULL); |
05b0d8e3 | 231 | BlockDriverState *bs = blk_bs(job->blk); |
0a3e155f | 232 | QLIST_REMOVE(job, job_list); |
05b0d8e3 PB |
233 | bs->job = NULL; |
234 | block_job_remove_all_bdrv(job); | |
235 | blk_remove_aio_context_notifier(job->blk, | |
236 | block_job_attached_aio_context, | |
237 | block_job_detach_aio_context, job); | |
238 | blk_unref(job->blk); | |
239 | error_free(job->blocker); | |
240 | g_free(job->id); | |
fc24908e | 241 | assert(!timer_pending(&job->sleep_timer)); |
05b0d8e3 PB |
242 | g_free(job); |
243 | } | |
244 | } | |
245 | ||
463e0be1 SH |
246 | static void block_job_attached_aio_context(AioContext *new_context, |
247 | void *opaque) | |
248 | { | |
249 | BlockJob *job = opaque; | |
250 | ||
251 | if (job->driver->attached_aio_context) { | |
252 | job->driver->attached_aio_context(job, new_context); | |
253 | } | |
254 | ||
255 | block_job_resume(job); | |
256 | } | |
257 | ||
bae8196d PB |
258 | static void block_job_drain(BlockJob *job) |
259 | { | |
260 | /* If job is !job->busy this kicks it into the next pause point. */ | |
261 | block_job_enter(job); | |
262 | ||
263 | blk_drain(job->blk); | |
264 | if (job->driver->drain) { | |
265 | job->driver->drain(job); | |
266 | } | |
267 | } | |
268 | ||
463e0be1 SH |
269 | static void block_job_detach_aio_context(void *opaque) |
270 | { | |
271 | BlockJob *job = opaque; | |
272 | ||
273 | /* In case the job terminates during aio_poll()... */ | |
274 | block_job_ref(job); | |
275 | ||
276 | block_job_pause(job); | |
277 | ||
463e0be1 | 278 | while (!job->paused && !job->completed) { |
bae8196d | 279 | block_job_drain(job); |
463e0be1 SH |
280 | } |
281 | ||
282 | block_job_unref(job); | |
283 | } | |
284 | ||
f321dcb5 PB |
285 | static char *child_job_get_parent_desc(BdrvChild *c) |
286 | { | |
287 | BlockJob *job = c->opaque; | |
288 | return g_strdup_printf("%s job '%s'", | |
977c736f | 289 | BlockJobType_str(job->driver->job_type), |
f321dcb5 PB |
290 | job->id); |
291 | } | |
292 | ||
ad90feba | 293 | static void child_job_drained_begin(BdrvChild *c) |
f321dcb5 | 294 | { |
ad90feba | 295 | BlockJob *job = c->opaque; |
f321dcb5 PB |
296 | block_job_pause(job); |
297 | } | |
298 | ||
ad90feba | 299 | static void child_job_drained_end(BdrvChild *c) |
f321dcb5 | 300 | { |
ad90feba | 301 | BlockJob *job = c->opaque; |
f321dcb5 PB |
302 | block_job_resume(job); |
303 | } | |
304 | ||
ad90feba KW |
305 | static const BdrvChildRole child_job = { |
306 | .get_parent_desc = child_job_get_parent_desc, | |
307 | .drained_begin = child_job_drained_begin, | |
308 | .drained_end = child_job_drained_end, | |
309 | .stay_at_node = true, | |
f321dcb5 PB |
310 | }; |
311 | ||
bbc02b90 KW |
312 | void block_job_remove_all_bdrv(BlockJob *job) |
313 | { | |
314 | GSList *l; | |
315 | for (l = job->nodes; l; l = l->next) { | |
316 | BdrvChild *c = l->data; | |
317 | bdrv_op_unblock_all(c->bs, job->blocker); | |
318 | bdrv_root_unref_child(c); | |
319 | } | |
320 | g_slist_free(job->nodes); | |
321 | job->nodes = NULL; | |
322 | } | |
323 | ||
76d554e2 KW |
324 | int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, |
325 | uint64_t perm, uint64_t shared_perm, Error **errp) | |
23d402d4 | 326 | { |
76d554e2 KW |
327 | BdrvChild *c; |
328 | ||
329 | c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, | |
330 | job, errp); | |
331 | if (c == NULL) { | |
332 | return -EPERM; | |
333 | } | |
334 | ||
335 | job->nodes = g_slist_prepend(job->nodes, c); | |
23d402d4 AG |
336 | bdrv_ref(bs); |
337 | bdrv_op_block_all(bs, job->blocker); | |
76d554e2 KW |
338 | |
339 | return 0; | |
23d402d4 AG |
340 | } |
341 | ||
559b935f JS |
342 | bool block_job_is_internal(BlockJob *job) |
343 | { | |
344 | return (job->id == NULL); | |
345 | } | |
346 | ||
5ccac6f1 JS |
347 | static bool block_job_started(BlockJob *job) |
348 | { | |
349 | return job->co; | |
350 | } | |
351 | ||
e3796a24 JS |
352 | /** |
353 | * All jobs must allow a pause point before entering their job proper. This | |
354 | * ensures that jobs can be paused prior to being started, then resumed later. | |
355 | */ | |
356 | static void coroutine_fn block_job_co_entry(void *opaque) | |
357 | { | |
358 | BlockJob *job = opaque; | |
359 | ||
360 | assert(job && job->driver && job->driver->start); | |
361 | block_job_pause_point(job); | |
362 | job->driver->start(job); | |
363 | } | |
364 | ||
fc24908e PB |
365 | static void block_job_sleep_timer_cb(void *opaque) |
366 | { | |
367 | BlockJob *job = opaque; | |
368 | ||
369 | block_job_enter(job); | |
370 | } | |
371 | ||
5ccac6f1 JS |
372 | void block_job_start(BlockJob *job) |
373 | { | |
374 | assert(job && !block_job_started(job) && job->paused && | |
e3796a24 JS |
375 | job->driver && job->driver->start); |
376 | job->co = qemu_coroutine_create(block_job_co_entry, job); | |
377 | job->pause_count--; | |
378 | job->busy = true; | |
379 | job->paused = false; | |
c9de4050 | 380 | block_job_state_transition(job, BLOCK_JOB_STATUS_RUNNING); |
aef4278c | 381 | bdrv_coroutine_enter(blk_bs(job->blk), job->co); |
5ccac6f1 JS |
382 | } |
383 | ||
3925cd3b JS |
384 | static void block_job_decommission(BlockJob *job) |
385 | { | |
386 | assert(job); | |
387 | job->completed = true; | |
388 | job->busy = false; | |
389 | job->paused = false; | |
390 | job->deferred_to_main_loop = true; | |
391 | block_job_state_transition(job, BLOCK_JOB_STATUS_NULL); | |
392 | block_job_unref(job); | |
393 | } | |
394 | ||
75f71059 JS |
395 | static void block_job_do_dismiss(BlockJob *job) |
396 | { | |
397 | block_job_decommission(job); | |
398 | } | |
399 | ||
e0cf0364 JS |
400 | static void block_job_conclude(BlockJob *job) |
401 | { | |
402 | block_job_state_transition(job, BLOCK_JOB_STATUS_CONCLUDED); | |
75f71059 JS |
403 | if (job->auto_dismiss || !block_job_started(job)) { |
404 | block_job_do_dismiss(job); | |
405 | } | |
e0cf0364 JS |
406 | } |
407 | ||
35d6b368 JS |
408 | static void block_job_update_rc(BlockJob *job) |
409 | { | |
410 | if (!job->ret && block_job_is_cancelled(job)) { | |
411 | job->ret = -ECANCELED; | |
412 | } | |
413 | if (job->ret) { | |
414 | block_job_state_transition(job, BLOCK_JOB_STATUS_ABORTING); | |
415 | } | |
416 | } | |
417 | ||
43628d93 JS |
418 | static void block_job_commit(BlockJob *job) |
419 | { | |
420 | assert(!job->ret); | |
421 | if (job->driver->commit) { | |
422 | job->driver->commit(job); | |
423 | } | |
424 | } | |
425 | ||
426 | static void block_job_abort(BlockJob *job) | |
427 | { | |
428 | assert(job->ret); | |
429 | if (job->driver->abort) { | |
430 | job->driver->abort(job); | |
431 | } | |
432 | } | |
433 | ||
434 | static void block_job_clean(BlockJob *job) | |
435 | { | |
436 | if (job->driver->clean) { | |
437 | job->driver->clean(job); | |
438 | } | |
439 | } | |
440 | ||
c55a832f FZ |
441 | static void block_job_completed_single(BlockJob *job) |
442 | { | |
4fb588e9 PB |
443 | assert(job->completed); |
444 | ||
35d6b368 JS |
445 | /* Ensure abort is called for late-transactional failures */ |
446 | block_job_update_rc(job); | |
10a3fbb0 | 447 | |
c55a832f | 448 | if (!job->ret) { |
43628d93 | 449 | block_job_commit(job); |
c55a832f | 450 | } else { |
43628d93 | 451 | block_job_abort(job); |
e8a40bf7 | 452 | } |
43628d93 | 453 | block_job_clean(job); |
8254b6d9 JS |
454 | |
455 | if (job->cb) { | |
456 | job->cb(job->opaque, job->ret); | |
457 | } | |
5ccac6f1 JS |
458 | |
459 | /* Emit events only if we actually started */ | |
460 | if (block_job_started(job)) { | |
461 | if (block_job_is_cancelled(job)) { | |
462 | block_job_event_cancelled(job); | |
463 | } else { | |
464 | const char *msg = NULL; | |
465 | if (job->ret < 0) { | |
466 | msg = strerror(-job->ret); | |
467 | } | |
468 | block_job_event_completed(job, msg); | |
8254b6d9 | 469 | } |
8254b6d9 JS |
470 | } |
471 | ||
75859b94 JS |
472 | QLIST_REMOVE(job, txn_list); |
473 | block_job_txn_unref(job->txn); | |
e0cf0364 | 474 | block_job_conclude(job); |
c55a832f FZ |
475 | } |
476 | ||
4c241cf5 PB |
477 | static void block_job_cancel_async(BlockJob *job) |
478 | { | |
479 | if (job->iostatus != BLOCK_DEVICE_IO_STATUS_OK) { | |
480 | block_job_iostatus_reset(job); | |
481 | } | |
482 | if (job->user_paused) { | |
483 | /* Do not call block_job_enter here, the caller will handle it. */ | |
484 | job->user_paused = false; | |
485 | job->pause_count--; | |
486 | } | |
487 | job->cancelled = true; | |
488 | } | |
489 | ||
c8ab5c2d PB |
490 | static int block_job_finish_sync(BlockJob *job, |
491 | void (*finish)(BlockJob *, Error **errp), | |
492 | Error **errp) | |
493 | { | |
494 | Error *local_err = NULL; | |
495 | int ret; | |
496 | ||
497 | assert(blk_bs(job->blk)->job == job); | |
498 | ||
499 | block_job_ref(job); | |
500 | ||
4fb588e9 PB |
501 | if (finish) { |
502 | finish(job, &local_err); | |
503 | } | |
c8ab5c2d PB |
504 | if (local_err) { |
505 | error_propagate(errp, local_err); | |
506 | block_job_unref(job); | |
507 | return -EBUSY; | |
508 | } | |
509 | /* block_job_drain calls block_job_enter, and it should be enough to | |
510 | * induce progress until the job completes or moves to the main thread. | |
511 | */ | |
512 | while (!job->deferred_to_main_loop && !job->completed) { | |
513 | block_job_drain(job); | |
514 | } | |
515 | while (!job->completed) { | |
516 | aio_poll(qemu_get_aio_context(), true); | |
517 | } | |
518 | ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret; | |
519 | block_job_unref(job); | |
520 | return ret; | |
521 | } | |
522 | ||
c55a832f FZ |
523 | static void block_job_completed_txn_abort(BlockJob *job) |
524 | { | |
525 | AioContext *ctx; | |
526 | BlockJobTxn *txn = job->txn; | |
4fb588e9 | 527 | BlockJob *other_job; |
c55a832f FZ |
528 | |
529 | if (txn->aborting) { | |
530 | /* | |
531 | * We are cancelled by another job, which will handle everything. | |
532 | */ | |
533 | return; | |
534 | } | |
535 | txn->aborting = true; | |
4fb588e9 PB |
536 | block_job_txn_ref(txn); |
537 | ||
c55a832f FZ |
538 | /* We are the first failed job. Cancel other jobs. */ |
539 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
b6d2e599 | 540 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
541 | aio_context_acquire(ctx); |
542 | } | |
4fb588e9 PB |
543 | |
544 | /* Other jobs are effectively cancelled by us, set the status for | |
545 | * them; this job, however, may or may not be cancelled, depending | |
546 | * on the caller, so leave it. */ | |
c55a832f | 547 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { |
4fb588e9 PB |
548 | if (other_job != job) { |
549 | block_job_cancel_async(other_job); | |
c55a832f | 550 | } |
c55a832f | 551 | } |
4fb588e9 PB |
552 | while (!QLIST_EMPTY(&txn->jobs)) { |
553 | other_job = QLIST_FIRST(&txn->jobs); | |
b6d2e599 | 554 | ctx = blk_get_aio_context(other_job->blk); |
4fb588e9 PB |
555 | if (!other_job->completed) { |
556 | assert(other_job->cancelled); | |
557 | block_job_finish_sync(other_job, NULL, NULL); | |
558 | } | |
c55a832f FZ |
559 | block_job_completed_single(other_job); |
560 | aio_context_release(ctx); | |
561 | } | |
4fb588e9 PB |
562 | |
563 | block_job_txn_unref(txn); | |
c55a832f FZ |
564 | } |
565 | ||
566 | static void block_job_completed_txn_success(BlockJob *job) | |
567 | { | |
568 | AioContext *ctx; | |
569 | BlockJobTxn *txn = job->txn; | |
570 | BlockJob *other_job, *next; | |
571 | /* | |
572 | * Successful completion, see if there are other running jobs in this | |
573 | * txn. | |
574 | */ | |
575 | QLIST_FOREACH(other_job, &txn->jobs, txn_list) { | |
576 | if (!other_job->completed) { | |
577 | return; | |
578 | } | |
579 | } | |
580 | /* We are the last completed job, commit the transaction. */ | |
581 | QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { | |
b6d2e599 | 582 | ctx = blk_get_aio_context(other_job->blk); |
c55a832f FZ |
583 | aio_context_acquire(ctx); |
584 | assert(other_job->ret == 0); | |
585 | block_job_completed_single(other_job); | |
586 | aio_context_release(ctx); | |
587 | } | |
588 | } | |
589 | ||
aa9ef2e6 JS |
590 | /* Assumes the block_job_mutex is held */ |
591 | static bool block_job_timer_pending(BlockJob *job) | |
592 | { | |
593 | return timer_pending(&job->sleep_timer); | |
594 | } | |
595 | ||
2f0c9fe6 PB |
596 | void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) |
597 | { | |
598 | Error *local_err = NULL; | |
aa9ef2e6 | 599 | int64_t old_speed = job->speed; |
2f0c9fe6 | 600 | |
3fc4b10a | 601 | if (!job->driver->set_speed) { |
c6bd8c70 | 602 | error_setg(errp, QERR_UNSUPPORTED); |
2f0c9fe6 PB |
603 | return; |
604 | } | |
0ec4dfb8 JS |
605 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_SET_SPEED, errp)) { |
606 | return; | |
607 | } | |
3fc4b10a | 608 | job->driver->set_speed(job, speed, &local_err); |
84d18f06 | 609 | if (local_err) { |
2f0c9fe6 PB |
610 | error_propagate(errp, local_err); |
611 | return; | |
612 | } | |
613 | ||
614 | job->speed = speed; | |
d4fce188 | 615 | if (speed && speed <= old_speed) { |
aa9ef2e6 JS |
616 | return; |
617 | } | |
618 | ||
619 | /* kick only if a timer is pending */ | |
620 | block_job_enter_cond(job, block_job_timer_pending); | |
2f0c9fe6 PB |
621 | } |
622 | ||
aeae883b PB |
623 | void block_job_complete(BlockJob *job, Error **errp) |
624 | { | |
559b935f JS |
625 | /* Should not be reachable via external interface for internal jobs */ |
626 | assert(job->id); | |
0ec4dfb8 JS |
627 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_COMPLETE, errp)) { |
628 | return; | |
629 | } | |
630 | if (job->pause_count || job->cancelled || !job->driver->complete) { | |
9df229c3 AG |
631 | error_setg(errp, "The active block job '%s' cannot be completed", |
632 | job->id); | |
aeae883b PB |
633 | return; |
634 | } | |
635 | ||
3fc4b10a | 636 | job->driver->complete(job, errp); |
aeae883b PB |
637 | } |
638 | ||
75f71059 JS |
639 | void block_job_dismiss(BlockJob **jobptr, Error **errp) |
640 | { | |
641 | BlockJob *job = *jobptr; | |
642 | /* similarly to _complete, this is QMP-interface only. */ | |
643 | assert(job->id); | |
644 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_DISMISS, errp)) { | |
645 | return; | |
646 | } | |
647 | ||
648 | block_job_do_dismiss(job); | |
649 | *jobptr = NULL; | |
650 | } | |
651 | ||
0ec4dfb8 | 652 | void block_job_user_pause(BlockJob *job, Error **errp) |
0df4ba58 | 653 | { |
0ec4dfb8 JS |
654 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_PAUSE, errp)) { |
655 | return; | |
656 | } | |
657 | if (job->user_paused) { | |
658 | error_setg(errp, "Job is already paused"); | |
659 | return; | |
660 | } | |
0df4ba58 JS |
661 | job->user_paused = true; |
662 | block_job_pause(job); | |
663 | } | |
664 | ||
0df4ba58 JS |
665 | bool block_job_user_paused(BlockJob *job) |
666 | { | |
6573d9c6 | 667 | return job->user_paused; |
0df4ba58 JS |
668 | } |
669 | ||
0ec4dfb8 | 670 | void block_job_user_resume(BlockJob *job, Error **errp) |
0df4ba58 | 671 | { |
0ec4dfb8 JS |
672 | assert(job); |
673 | if (!job->user_paused || job->pause_count <= 0) { | |
674 | error_setg(errp, "Can't resume a job that was not paused"); | |
675 | return; | |
0df4ba58 | 676 | } |
0ec4dfb8 JS |
677 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_RESUME, errp)) { |
678 | return; | |
679 | } | |
680 | block_job_iostatus_reset(job); | |
681 | job->user_paused = false; | |
682 | block_job_resume(job); | |
0df4ba58 JS |
683 | } |
684 | ||
8acc72a4 PB |
685 | void block_job_cancel(BlockJob *job) |
686 | { | |
e0cf0364 | 687 | if (job->status == BLOCK_JOB_STATUS_CONCLUDED) { |
75f71059 | 688 | block_job_do_dismiss(job); |
e0cf0364 | 689 | } else if (block_job_started(job)) { |
4c241cf5 | 690 | block_job_cancel_async(job); |
5ccac6f1 JS |
691 | block_job_enter(job); |
692 | } else { | |
693 | block_job_completed(job, -ECANCELED); | |
694 | } | |
8acc72a4 PB |
695 | } |
696 | ||
0ec4dfb8 JS |
697 | void block_job_user_cancel(BlockJob *job, Error **errp) |
698 | { | |
699 | if (block_job_apply_verb(job, BLOCK_JOB_VERB_CANCEL, errp)) { | |
700 | return; | |
701 | } | |
702 | block_job_cancel(job); | |
703 | } | |
704 | ||
345f9e1b HR |
705 | /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be |
706 | * used with block_job_finish_sync() without the need for (rather nasty) | |
707 | * function pointer casts there. */ | |
708 | static void block_job_cancel_err(BlockJob *job, Error **errp) | |
709 | { | |
710 | block_job_cancel(job); | |
711 | } | |
712 | ||
713 | int block_job_cancel_sync(BlockJob *job) | |
714 | { | |
715 | return block_job_finish_sync(job, &block_job_cancel_err, NULL); | |
716 | } | |
717 | ||
a1a2af07 KW |
718 | void block_job_cancel_sync_all(void) |
719 | { | |
720 | BlockJob *job; | |
721 | AioContext *aio_context; | |
722 | ||
723 | while ((job = QLIST_FIRST(&block_jobs))) { | |
b6d2e599 | 724 | aio_context = blk_get_aio_context(job->blk); |
a1a2af07 KW |
725 | aio_context_acquire(aio_context); |
726 | block_job_cancel_sync(job); | |
727 | aio_context_release(aio_context); | |
728 | } | |
729 | } | |
730 | ||
345f9e1b HR |
731 | int block_job_complete_sync(BlockJob *job, Error **errp) |
732 | { | |
733 | return block_job_finish_sync(job, &block_job_complete, errp); | |
734 | } | |
735 | ||
559b935f | 736 | BlockJobInfo *block_job_query(BlockJob *job, Error **errp) |
30e628b7 | 737 | { |
559b935f JS |
738 | BlockJobInfo *info; |
739 | ||
740 | if (block_job_is_internal(job)) { | |
741 | error_setg(errp, "Cannot query QEMU internal jobs"); | |
742 | return NULL; | |
743 | } | |
744 | info = g_new0(BlockJobInfo, 1); | |
977c736f | 745 | info->type = g_strdup(BlockJobType_str(job->driver->job_type)); |
8ccb9569 | 746 | info->device = g_strdup(job->id); |
32c81a4a | 747 | info->len = job->len; |
fc24908e | 748 | info->busy = atomic_read(&job->busy); |
751ebd76 | 749 | info->paused = job->pause_count > 0; |
32c81a4a PB |
750 | info->offset = job->offset; |
751 | info->speed = job->speed; | |
752 | info->io_status = job->iostatus; | |
ef6dbf1e | 753 | info->ready = job->ready; |
58b295ba | 754 | info->status = job->status; |
30e628b7 PB |
755 | return info; |
756 | } | |
32c81a4a PB |
757 | |
758 | static void block_job_iostatus_set_err(BlockJob *job, int error) | |
759 | { | |
760 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { | |
761 | job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : | |
762 | BLOCK_DEVICE_IO_STATUS_FAILED; | |
763 | } | |
764 | } | |
765 | ||
8254b6d9 | 766 | static void block_job_event_cancelled(BlockJob *job) |
bcada37b | 767 | { |
559b935f JS |
768 | if (block_job_is_internal(job)) { |
769 | return; | |
770 | } | |
771 | ||
bcada37b | 772 | qapi_event_send_block_job_cancelled(job->driver->job_type, |
8ccb9569 | 773 | job->id, |
bcada37b WX |
774 | job->len, |
775 | job->offset, | |
776 | job->speed, | |
777 | &error_abort); | |
778 | } | |
32c81a4a | 779 | |
8254b6d9 | 780 | static void block_job_event_completed(BlockJob *job, const char *msg) |
a66a2a36 | 781 | { |
559b935f JS |
782 | if (block_job_is_internal(job)) { |
783 | return; | |
784 | } | |
785 | ||
bcada37b | 786 | qapi_event_send_block_job_completed(job->driver->job_type, |
8ccb9569 | 787 | job->id, |
bcada37b WX |
788 | job->len, |
789 | job->offset, | |
790 | job->speed, | |
791 | !!msg, | |
792 | msg, | |
793 | &error_abort); | |
a66a2a36 PB |
794 | } |
795 | ||
88691b37 PB |
796 | /* |
797 | * API for block job drivers and the block layer. These functions are | |
798 | * declared in blockjob_int.h. | |
799 | */ | |
800 | ||
801 | void *block_job_create(const char *job_id, const BlockJobDriver *driver, | |
75859b94 | 802 | BlockJobTxn *txn, BlockDriverState *bs, uint64_t perm, |
88691b37 PB |
803 | uint64_t shared_perm, int64_t speed, int flags, |
804 | BlockCompletionFunc *cb, void *opaque, Error **errp) | |
805 | { | |
806 | BlockBackend *blk; | |
807 | BlockJob *job; | |
808 | int ret; | |
809 | ||
810 | if (bs->job) { | |
811 | error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
812 | return NULL; | |
813 | } | |
814 | ||
815 | if (job_id == NULL && !(flags & BLOCK_JOB_INTERNAL)) { | |
816 | job_id = bdrv_get_device_name(bs); | |
817 | if (!*job_id) { | |
818 | error_setg(errp, "An explicit job ID is required for this node"); | |
819 | return NULL; | |
820 | } | |
821 | } | |
822 | ||
823 | if (job_id) { | |
824 | if (flags & BLOCK_JOB_INTERNAL) { | |
825 | error_setg(errp, "Cannot specify job ID for internal block job"); | |
826 | return NULL; | |
827 | } | |
828 | ||
829 | if (!id_wellformed(job_id)) { | |
830 | error_setg(errp, "Invalid job ID '%s'", job_id); | |
831 | return NULL; | |
832 | } | |
833 | ||
834 | if (block_job_get(job_id)) { | |
835 | error_setg(errp, "Job ID '%s' already in use", job_id); | |
836 | return NULL; | |
837 | } | |
838 | } | |
839 | ||
840 | blk = blk_new(perm, shared_perm); | |
841 | ret = blk_insert_bs(blk, bs, errp); | |
842 | if (ret < 0) { | |
843 | blk_unref(blk); | |
844 | return NULL; | |
845 | } | |
846 | ||
847 | job = g_malloc0(driver->instance_size); | |
848 | job->driver = driver; | |
849 | job->id = g_strdup(job_id); | |
850 | job->blk = blk; | |
851 | job->cb = cb; | |
852 | job->opaque = opaque; | |
853 | job->busy = false; | |
854 | job->paused = true; | |
855 | job->pause_count = 1; | |
856 | job->refcnt = 1; | |
75f71059 | 857 | job->auto_dismiss = !(flags & BLOCK_JOB_MANUAL_DISMISS); |
c9de4050 | 858 | block_job_state_transition(job, BLOCK_JOB_STATUS_CREATED); |
fc24908e PB |
859 | aio_timer_init(qemu_get_aio_context(), &job->sleep_timer, |
860 | QEMU_CLOCK_REALTIME, SCALE_NS, | |
861 | block_job_sleep_timer_cb, job); | |
88691b37 PB |
862 | |
863 | error_setg(&job->blocker, "block device is in use by block job: %s", | |
977c736f | 864 | BlockJobType_str(driver->job_type)); |
88691b37 PB |
865 | block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); |
866 | bs->job = job; | |
867 | ||
88691b37 PB |
868 | bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); |
869 | ||
870 | QLIST_INSERT_HEAD(&block_jobs, job, job_list); | |
871 | ||
872 | blk_add_aio_context_notifier(blk, block_job_attached_aio_context, | |
873 | block_job_detach_aio_context, job); | |
874 | ||
875 | /* Only set speed when necessary to avoid NotSupported error */ | |
876 | if (speed != 0) { | |
877 | Error *local_err = NULL; | |
878 | ||
879 | block_job_set_speed(job, speed, &local_err); | |
880 | if (local_err) { | |
3925cd3b | 881 | block_job_early_fail(job); |
88691b37 PB |
882 | error_propagate(errp, local_err); |
883 | return NULL; | |
884 | } | |
885 | } | |
75859b94 JS |
886 | |
887 | /* Single jobs are modeled as single-job transactions for sake of | |
888 | * consolidating the job management logic */ | |
889 | if (!txn) { | |
890 | txn = block_job_txn_new(); | |
891 | block_job_txn_add_job(txn, job); | |
892 | block_job_txn_unref(txn); | |
893 | } else { | |
894 | block_job_txn_add_job(txn, job); | |
895 | } | |
896 | ||
88691b37 PB |
897 | return job; |
898 | } | |
899 | ||
f321dcb5 PB |
900 | void block_job_pause_all(void) |
901 | { | |
902 | BlockJob *job = NULL; | |
903 | while ((job = block_job_next(job))) { | |
904 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
905 | ||
906 | aio_context_acquire(aio_context); | |
3d5d319e | 907 | block_job_ref(job); |
f321dcb5 PB |
908 | block_job_pause(job); |
909 | aio_context_release(aio_context); | |
910 | } | |
911 | } | |
912 | ||
88691b37 PB |
913 | void block_job_early_fail(BlockJob *job) |
914 | { | |
3925cd3b JS |
915 | assert(job->status == BLOCK_JOB_STATUS_CREATED); |
916 | block_job_decommission(job); | |
88691b37 PB |
917 | } |
918 | ||
919 | void block_job_completed(BlockJob *job, int ret) | |
920 | { | |
75859b94 | 921 | assert(job && job->txn && !job->completed); |
88691b37 | 922 | assert(blk_bs(job->blk)->job == job); |
88691b37 PB |
923 | job->completed = true; |
924 | job->ret = ret; | |
35d6b368 JS |
925 | block_job_update_rc(job); |
926 | trace_block_job_completed(job, ret, job->ret); | |
927 | if (job->ret) { | |
88691b37 PB |
928 | block_job_completed_txn_abort(job); |
929 | } else { | |
930 | block_job_completed_txn_success(job); | |
931 | } | |
932 | } | |
933 | ||
934 | static bool block_job_should_pause(BlockJob *job) | |
935 | { | |
936 | return job->pause_count > 0; | |
937 | } | |
938 | ||
fc24908e PB |
939 | /* Yield, and schedule a timer to reenter the coroutine after @ns nanoseconds. |
940 | * Reentering the job coroutine with block_job_enter() before the timer has | |
941 | * expired is allowed and cancels the timer. | |
942 | * | |
943 | * If @ns is (uint64_t) -1, no timer is scheduled and block_job_enter() must be | |
944 | * called explicitly. */ | |
945 | static void block_job_do_yield(BlockJob *job, uint64_t ns) | |
356f59b8 | 946 | { |
fc24908e PB |
947 | block_job_lock(); |
948 | if (ns != -1) { | |
949 | timer_mod(&job->sleep_timer, ns); | |
950 | } | |
356f59b8 | 951 | job->busy = false; |
fc24908e | 952 | block_job_unlock(); |
356f59b8 PB |
953 | qemu_coroutine_yield(); |
954 | ||
955 | /* Set by block_job_enter before re-entering the coroutine. */ | |
956 | assert(job->busy); | |
957 | } | |
958 | ||
88691b37 PB |
959 | void coroutine_fn block_job_pause_point(BlockJob *job) |
960 | { | |
961 | assert(job && block_job_started(job)); | |
962 | ||
963 | if (!block_job_should_pause(job)) { | |
964 | return; | |
965 | } | |
966 | if (block_job_is_cancelled(job)) { | |
967 | return; | |
968 | } | |
969 | ||
970 | if (job->driver->pause) { | |
971 | job->driver->pause(job); | |
972 | } | |
973 | ||
974 | if (block_job_should_pause(job) && !block_job_is_cancelled(job)) { | |
58b295ba | 975 | BlockJobStatus status = job->status; |
c9de4050 JS |
976 | block_job_state_transition(job, status == BLOCK_JOB_STATUS_READY ? \ |
977 | BLOCK_JOB_STATUS_STANDBY : \ | |
978 | BLOCK_JOB_STATUS_PAUSED); | |
88691b37 | 979 | job->paused = true; |
fc24908e | 980 | block_job_do_yield(job, -1); |
88691b37 | 981 | job->paused = false; |
c9de4050 | 982 | block_job_state_transition(job, status); |
88691b37 PB |
983 | } |
984 | ||
985 | if (job->driver->resume) { | |
986 | job->driver->resume(job); | |
987 | } | |
988 | } | |
989 | ||
f321dcb5 PB |
990 | void block_job_resume_all(void) |
991 | { | |
3d5d319e AG |
992 | BlockJob *job, *next; |
993 | ||
994 | QLIST_FOREACH_SAFE(job, &block_jobs, job_list, next) { | |
f321dcb5 PB |
995 | AioContext *aio_context = blk_get_aio_context(job->blk); |
996 | ||
997 | aio_context_acquire(aio_context); | |
998 | block_job_resume(job); | |
3d5d319e | 999 | block_job_unref(job); |
f321dcb5 PB |
1000 | aio_context_release(aio_context); |
1001 | } | |
1002 | } | |
1003 | ||
aa9ef2e6 JS |
1004 | /* |
1005 | * Conditionally enter a block_job pending a call to fn() while | |
1006 | * under the block_job_lock critical section. | |
1007 | */ | |
1008 | static void block_job_enter_cond(BlockJob *job, bool(*fn)(BlockJob *job)) | |
88691b37 | 1009 | { |
eb05e011 PB |
1010 | if (!block_job_started(job)) { |
1011 | return; | |
1012 | } | |
1013 | if (job->deferred_to_main_loop) { | |
1014 | return; | |
1015 | } | |
1016 | ||
fc24908e | 1017 | block_job_lock(); |
356f59b8 | 1018 | if (job->busy) { |
fc24908e | 1019 | block_job_unlock(); |
356f59b8 | 1020 | return; |
88691b37 | 1021 | } |
356f59b8 | 1022 | |
aa9ef2e6 JS |
1023 | if (fn && !fn(job)) { |
1024 | block_job_unlock(); | |
1025 | return; | |
1026 | } | |
1027 | ||
fc24908e PB |
1028 | assert(!job->deferred_to_main_loop); |
1029 | timer_del(&job->sleep_timer); | |
356f59b8 | 1030 | job->busy = true; |
fc24908e | 1031 | block_job_unlock(); |
356f59b8 | 1032 | aio_co_wake(job->co); |
88691b37 PB |
1033 | } |
1034 | ||
aa9ef2e6 JS |
1035 | void block_job_enter(BlockJob *job) |
1036 | { | |
1037 | block_job_enter_cond(job, NULL); | |
1038 | } | |
1039 | ||
88691b37 PB |
1040 | bool block_job_is_cancelled(BlockJob *job) |
1041 | { | |
1042 | return job->cancelled; | |
1043 | } | |
1044 | ||
5bf1d5a7 | 1045 | void block_job_sleep_ns(BlockJob *job, int64_t ns) |
88691b37 PB |
1046 | { |
1047 | assert(job->busy); | |
1048 | ||
1049 | /* Check cancellation *before* setting busy = false, too! */ | |
1050 | if (block_job_is_cancelled(job)) { | |
1051 | return; | |
1052 | } | |
1053 | ||
88691b37 | 1054 | if (!block_job_should_pause(job)) { |
fc24908e | 1055 | block_job_do_yield(job, qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + ns); |
88691b37 | 1056 | } |
88691b37 PB |
1057 | |
1058 | block_job_pause_point(job); | |
1059 | } | |
1060 | ||
1061 | void block_job_yield(BlockJob *job) | |
1062 | { | |
1063 | assert(job->busy); | |
1064 | ||
1065 | /* Check cancellation *before* setting busy = false, too! */ | |
1066 | if (block_job_is_cancelled(job)) { | |
1067 | return; | |
1068 | } | |
1069 | ||
88691b37 | 1070 | if (!block_job_should_pause(job)) { |
fc24908e | 1071 | block_job_do_yield(job, -1); |
88691b37 | 1072 | } |
88691b37 PB |
1073 | |
1074 | block_job_pause_point(job); | |
1075 | } | |
1076 | ||
2caf63a9 PB |
1077 | void block_job_iostatus_reset(BlockJob *job) |
1078 | { | |
4c241cf5 PB |
1079 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { |
1080 | return; | |
1081 | } | |
1082 | assert(job->user_paused && job->pause_count > 0); | |
2caf63a9 PB |
1083 | job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; |
1084 | } | |
1085 | ||
bcada37b | 1086 | void block_job_event_ready(BlockJob *job) |
a66a2a36 | 1087 | { |
c9de4050 | 1088 | block_job_state_transition(job, BLOCK_JOB_STATUS_READY); |
ef6dbf1e HR |
1089 | job->ready = true; |
1090 | ||
559b935f JS |
1091 | if (block_job_is_internal(job)) { |
1092 | return; | |
1093 | } | |
1094 | ||
518848a2 | 1095 | qapi_event_send_block_job_ready(job->driver->job_type, |
8ccb9569 | 1096 | job->id, |
518848a2 MA |
1097 | job->len, |
1098 | job->offset, | |
1099 | job->speed, &error_abort); | |
a66a2a36 PB |
1100 | } |
1101 | ||
81e254dc | 1102 | BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, |
32c81a4a PB |
1103 | int is_read, int error) |
1104 | { | |
1105 | BlockErrorAction action; | |
1106 | ||
1107 | switch (on_err) { | |
1108 | case BLOCKDEV_ON_ERROR_ENOSPC: | |
8c398252 | 1109 | case BLOCKDEV_ON_ERROR_AUTO: |
a589569f WX |
1110 | action = (error == ENOSPC) ? |
1111 | BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; | |
32c81a4a PB |
1112 | break; |
1113 | case BLOCKDEV_ON_ERROR_STOP: | |
a589569f | 1114 | action = BLOCK_ERROR_ACTION_STOP; |
32c81a4a PB |
1115 | break; |
1116 | case BLOCKDEV_ON_ERROR_REPORT: | |
a589569f | 1117 | action = BLOCK_ERROR_ACTION_REPORT; |
32c81a4a PB |
1118 | break; |
1119 | case BLOCKDEV_ON_ERROR_IGNORE: | |
a589569f | 1120 | action = BLOCK_ERROR_ACTION_IGNORE; |
32c81a4a PB |
1121 | break; |
1122 | default: | |
1123 | abort(); | |
1124 | } | |
559b935f JS |
1125 | if (!block_job_is_internal(job)) { |
1126 | qapi_event_send_block_job_error(job->id, | |
1127 | is_read ? IO_OPERATION_TYPE_READ : | |
1128 | IO_OPERATION_TYPE_WRITE, | |
1129 | action, &error_abort); | |
1130 | } | |
a589569f | 1131 | if (action == BLOCK_ERROR_ACTION_STOP) { |
0ec4dfb8 | 1132 | block_job_pause(job); |
751ebd76 | 1133 | /* make the pause user visible, which will be resumed from QMP. */ |
0ec4dfb8 | 1134 | job->user_paused = true; |
32c81a4a | 1135 | block_job_iostatus_set_err(job, error); |
32c81a4a PB |
1136 | } |
1137 | return action; | |
1138 | } | |
dec7d421 SH |
1139 | |
1140 | typedef struct { | |
1141 | BlockJob *job; | |
dec7d421 SH |
1142 | AioContext *aio_context; |
1143 | BlockJobDeferToMainLoopFn *fn; | |
1144 | void *opaque; | |
1145 | } BlockJobDeferToMainLoopData; | |
1146 | ||
1147 | static void block_job_defer_to_main_loop_bh(void *opaque) | |
1148 | { | |
1149 | BlockJobDeferToMainLoopData *data = opaque; | |
1150 | AioContext *aio_context; | |
1151 | ||
dec7d421 SH |
1152 | /* Prevent race with block_job_defer_to_main_loop() */ |
1153 | aio_context_acquire(data->aio_context); | |
1154 | ||
1155 | /* Fetch BDS AioContext again, in case it has changed */ | |
b6d2e599 | 1156 | aio_context = blk_get_aio_context(data->job->blk); |
d79df2a2 PB |
1157 | if (aio_context != data->aio_context) { |
1158 | aio_context_acquire(aio_context); | |
1159 | } | |
dec7d421 SH |
1160 | |
1161 | data->fn(data->job, data->opaque); | |
1162 | ||
d79df2a2 PB |
1163 | if (aio_context != data->aio_context) { |
1164 | aio_context_release(aio_context); | |
1165 | } | |
dec7d421 SH |
1166 | |
1167 | aio_context_release(data->aio_context); | |
1168 | ||
1169 | g_free(data); | |
1170 | } | |
1171 | ||
1172 | void block_job_defer_to_main_loop(BlockJob *job, | |
1173 | BlockJobDeferToMainLoopFn *fn, | |
1174 | void *opaque) | |
1175 | { | |
1176 | BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data)); | |
1177 | data->job = job; | |
b6d2e599 | 1178 | data->aio_context = blk_get_aio_context(job->blk); |
dec7d421 SH |
1179 | data->fn = fn; |
1180 | data->opaque = opaque; | |
794f0141 | 1181 | job->deferred_to_main_loop = true; |
dec7d421 | 1182 | |
fffb6e12 PB |
1183 | aio_bh_schedule_oneshot(qemu_get_aio_context(), |
1184 | block_job_defer_to_main_loop_bh, data); | |
dec7d421 | 1185 | } |