| 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 | |
| 26 | #include "qemu/osdep.h" |
| 27 | #include "qemu/aio-wait.h" |
| 28 | #include "block/block.h" |
| 29 | #include "block/blockjob_int.h" |
| 30 | #include "block/block_int.h" |
| 31 | #include "block/trace.h" |
| 32 | #include "system/block-backend.h" |
| 33 | #include "qapi/error.h" |
| 34 | #include "qapi/qapi-events-block-core.h" |
| 35 | #include "qapi/qmp/qerror.h" |
| 36 | #include "qemu/main-loop.h" |
| 37 | #include "qemu/timer.h" |
| 38 | |
| 39 | static bool is_block_job(Job *job) |
| 40 | { |
| 41 | return job_type(job) == JOB_TYPE_BACKUP || |
| 42 | job_type(job) == JOB_TYPE_COMMIT || |
| 43 | job_type(job) == JOB_TYPE_MIRROR || |
| 44 | job_type(job) == JOB_TYPE_STREAM; |
| 45 | } |
| 46 | |
| 47 | BlockJob *block_job_next_locked(BlockJob *bjob) |
| 48 | { |
| 49 | Job *job = bjob ? &bjob->job : NULL; |
| 50 | GLOBAL_STATE_CODE(); |
| 51 | |
| 52 | do { |
| 53 | job = job_next_locked(job); |
| 54 | } while (job && !is_block_job(job)); |
| 55 | |
| 56 | return job ? container_of(job, BlockJob, job) : NULL; |
| 57 | } |
| 58 | |
| 59 | BlockJob *block_job_get_locked(const char *id) |
| 60 | { |
| 61 | Job *job = job_get_locked(id); |
| 62 | GLOBAL_STATE_CODE(); |
| 63 | |
| 64 | if (job && is_block_job(job)) { |
| 65 | return container_of(job, BlockJob, job); |
| 66 | } else { |
| 67 | return NULL; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | BlockJob *block_job_get(const char *id) |
| 72 | { |
| 73 | JOB_LOCK_GUARD(); |
| 74 | return block_job_get_locked(id); |
| 75 | } |
| 76 | |
| 77 | void block_job_free(Job *job) |
| 78 | { |
| 79 | BlockJob *bjob = container_of(job, BlockJob, job); |
| 80 | GLOBAL_STATE_CODE(); |
| 81 | |
| 82 | block_job_remove_all_bdrv(bjob); |
| 83 | ratelimit_destroy(&bjob->limit); |
| 84 | error_free(bjob->blocker); |
| 85 | } |
| 86 | |
| 87 | static char *child_job_get_parent_desc(BdrvChild *c) |
| 88 | { |
| 89 | BlockJob *job = c->opaque; |
| 90 | return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); |
| 91 | } |
| 92 | |
| 93 | static void child_job_drained_begin(BdrvChild *c) |
| 94 | { |
| 95 | BlockJob *job = c->opaque; |
| 96 | job_pause(&job->job); |
| 97 | } |
| 98 | |
| 99 | static bool child_job_drained_poll(BdrvChild *c) |
| 100 | { |
| 101 | BlockJob *bjob = c->opaque; |
| 102 | Job *job = &bjob->job; |
| 103 | const BlockJobDriver *drv = block_job_driver(bjob); |
| 104 | |
| 105 | /* An inactive or completed job doesn't have any pending requests. Jobs |
| 106 | * with !job->busy are either already paused or have a pause point after |
| 107 | * being reentered, so no job driver code will run before they pause. */ |
| 108 | WITH_JOB_LOCK_GUARD() { |
| 109 | if (!job->busy || job_is_completed_locked(job)) { |
| 110 | return false; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* Otherwise, assume that it isn't fully stopped yet, but allow the job to |
| 115 | * override this assumption. */ |
| 116 | if (drv->drained_poll) { |
| 117 | return drv->drained_poll(bjob); |
| 118 | } else { |
| 119 | return true; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | static void child_job_drained_end(BdrvChild *c) |
| 124 | { |
| 125 | BlockJob *job = c->opaque; |
| 126 | job_resume(&job->job); |
| 127 | } |
| 128 | |
| 129 | typedef struct BdrvStateChildJobContext { |
| 130 | AioContext *new_ctx; |
| 131 | BlockJob *job; |
| 132 | } BdrvStateChildJobContext; |
| 133 | |
| 134 | static void child_job_set_aio_ctx_commit(void *opaque) |
| 135 | { |
| 136 | BdrvStateChildJobContext *s = opaque; |
| 137 | BlockJob *job = s->job; |
| 138 | |
| 139 | job_set_aio_context(&job->job, s->new_ctx); |
| 140 | } |
| 141 | |
| 142 | static TransactionActionDrv change_child_job_context = { |
| 143 | .commit = child_job_set_aio_ctx_commit, |
| 144 | .clean = g_free, |
| 145 | }; |
| 146 | |
| 147 | static bool GRAPH_RDLOCK |
| 148 | child_job_change_aio_ctx(BdrvChild *c, AioContext *ctx, GHashTable *visited, |
| 149 | Transaction *tran, Error **errp) |
| 150 | { |
| 151 | BlockJob *job = c->opaque; |
| 152 | BdrvStateChildJobContext *s; |
| 153 | GSList *l; |
| 154 | |
| 155 | for (l = job->nodes; l; l = l->next) { |
| 156 | BdrvChild *sibling = l->data; |
| 157 | if (!bdrv_child_change_aio_context(sibling, ctx, visited, |
| 158 | tran, errp)) { |
| 159 | return false; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | s = g_new(BdrvStateChildJobContext, 1); |
| 164 | *s = (BdrvStateChildJobContext) { |
| 165 | .new_ctx = ctx, |
| 166 | .job = job, |
| 167 | }; |
| 168 | |
| 169 | tran_add(tran, &change_child_job_context, s); |
| 170 | return true; |
| 171 | } |
| 172 | |
| 173 | static AioContext *child_job_get_parent_aio_context(BdrvChild *c) |
| 174 | { |
| 175 | BlockJob *job = c->opaque; |
| 176 | IO_CODE(); |
| 177 | JOB_LOCK_GUARD(); |
| 178 | |
| 179 | return job->job.aio_context; |
| 180 | } |
| 181 | |
| 182 | static const BdrvChildClass child_job = { |
| 183 | .get_parent_desc = child_job_get_parent_desc, |
| 184 | .drained_begin = child_job_drained_begin, |
| 185 | .drained_poll = child_job_drained_poll, |
| 186 | .drained_end = child_job_drained_end, |
| 187 | .change_aio_ctx = child_job_change_aio_ctx, |
| 188 | .stay_at_node = true, |
| 189 | .get_parent_aio_context = child_job_get_parent_aio_context, |
| 190 | }; |
| 191 | |
| 192 | void block_job_remove_all_bdrv(BlockJob *job) |
| 193 | { |
| 194 | GLOBAL_STATE_CODE(); |
| 195 | /* |
| 196 | * bdrv_root_unref_child() may reach child_job_[can_]set_aio_ctx(), |
| 197 | * which will also traverse job->nodes, so consume the list one by |
| 198 | * one to make sure that such a concurrent access does not attempt |
| 199 | * to process an already freed BdrvChild. |
| 200 | */ |
| 201 | bdrv_graph_wrlock_drained(); |
| 202 | while (job->nodes) { |
| 203 | GSList *l = job->nodes; |
| 204 | BdrvChild *c = l->data; |
| 205 | |
| 206 | job->nodes = l->next; |
| 207 | |
| 208 | bdrv_op_unblock_all(c->bs, job->blocker); |
| 209 | bdrv_root_unref_child(c); |
| 210 | |
| 211 | g_slist_free_1(l); |
| 212 | } |
| 213 | bdrv_graph_wrunlock(); |
| 214 | } |
| 215 | |
| 216 | bool block_job_has_bdrv(BlockJob *job, BlockDriverState *bs) |
| 217 | { |
| 218 | GSList *el; |
| 219 | GLOBAL_STATE_CODE(); |
| 220 | |
| 221 | for (el = job->nodes; el; el = el->next) { |
| 222 | BdrvChild *c = el->data; |
| 223 | if (c->bs == bs) { |
| 224 | return true; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | return false; |
| 229 | } |
| 230 | |
| 231 | int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, |
| 232 | uint64_t perm, uint64_t shared_perm, Error **errp) |
| 233 | { |
| 234 | BdrvChild *c; |
| 235 | GLOBAL_STATE_CODE(); |
| 236 | |
| 237 | bdrv_ref(bs); |
| 238 | |
| 239 | c = bdrv_root_attach_child(bs, name, &child_job, 0, perm, shared_perm, job, |
| 240 | errp); |
| 241 | if (c == NULL) { |
| 242 | return -EPERM; |
| 243 | } |
| 244 | |
| 245 | job->nodes = g_slist_prepend(job->nodes, c); |
| 246 | bdrv_op_block_all(bs, job->blocker); |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | /* Called with job_mutex lock held. */ |
| 252 | static void block_job_on_idle_locked(Notifier *n, void *opaque) |
| 253 | { |
| 254 | aio_wait_kick(); |
| 255 | } |
| 256 | |
| 257 | bool block_job_is_internal(BlockJob *job) |
| 258 | { |
| 259 | return (job->job.id == NULL); |
| 260 | } |
| 261 | |
| 262 | const BlockJobDriver *block_job_driver(BlockJob *job) |
| 263 | { |
| 264 | return container_of(job->job.driver, BlockJobDriver, job_driver); |
| 265 | } |
| 266 | |
| 267 | /* Assumes the job_mutex is held */ |
| 268 | static bool job_timer_pending(Job *job) |
| 269 | { |
| 270 | return timer_pending(&job->sleep_timer); |
| 271 | } |
| 272 | |
| 273 | bool block_job_set_speed_locked(BlockJob *job, int64_t speed, Error **errp) |
| 274 | { |
| 275 | const BlockJobDriver *drv = block_job_driver(job); |
| 276 | int64_t old_speed = job->speed; |
| 277 | |
| 278 | GLOBAL_STATE_CODE(); |
| 279 | |
| 280 | if (job_apply_verb_locked(&job->job, JOB_VERB_SET_SPEED, errp) < 0) { |
| 281 | return false; |
| 282 | } |
| 283 | if (speed < 0) { |
| 284 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "speed", |
| 285 | "a non-negative value"); |
| 286 | return false; |
| 287 | } |
| 288 | |
| 289 | ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); |
| 290 | |
| 291 | job->speed = speed; |
| 292 | |
| 293 | if (drv->set_speed) { |
| 294 | job_unlock(); |
| 295 | drv->set_speed(job, speed); |
| 296 | job_lock(); |
| 297 | } |
| 298 | |
| 299 | if (speed && speed <= old_speed) { |
| 300 | return true; |
| 301 | } |
| 302 | |
| 303 | /* kick only if a timer is pending */ |
| 304 | job_enter_cond_locked(&job->job, job_timer_pending); |
| 305 | |
| 306 | return true; |
| 307 | } |
| 308 | |
| 309 | static bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) |
| 310 | { |
| 311 | JOB_LOCK_GUARD(); |
| 312 | return block_job_set_speed_locked(job, speed, errp); |
| 313 | } |
| 314 | |
| 315 | void block_job_change_locked(BlockJob *job, BlockJobChangeOptions *opts, |
| 316 | Error **errp) |
| 317 | { |
| 318 | const BlockJobDriver *drv = block_job_driver(job); |
| 319 | |
| 320 | GLOBAL_STATE_CODE(); |
| 321 | |
| 322 | if (job_apply_verb_locked(&job->job, JOB_VERB_CHANGE, errp)) { |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | if (drv->change) { |
| 327 | job_unlock(); |
| 328 | drv->change(job, opts, errp); |
| 329 | job_lock(); |
| 330 | } else { |
| 331 | error_setg(errp, "Job type does not support change"); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | void block_job_ratelimit_processed_bytes(BlockJob *job, uint64_t n) |
| 336 | { |
| 337 | IO_CODE(); |
| 338 | ratelimit_calculate_delay(&job->limit, n); |
| 339 | } |
| 340 | |
| 341 | void block_job_ratelimit_sleep(BlockJob *job) |
| 342 | { |
| 343 | uint64_t delay_ns; |
| 344 | |
| 345 | /* |
| 346 | * Sleep at least once. If the job is reentered early, keep waiting until |
| 347 | * we've waited for the full time that is necessary to keep the job at the |
| 348 | * right speed. |
| 349 | * |
| 350 | * Make sure to recalculate the delay after each (possibly interrupted) |
| 351 | * sleep because the speed can change while the job has yielded. |
| 352 | */ |
| 353 | do { |
| 354 | delay_ns = ratelimit_calculate_delay(&job->limit, 0); |
| 355 | job_sleep_ns(&job->job, delay_ns); |
| 356 | } while (delay_ns && !job_is_cancelled(&job->job)); |
| 357 | } |
| 358 | |
| 359 | BlockJobInfo *block_job_query_locked(BlockJob *job, Error **errp) |
| 360 | { |
| 361 | BlockJobInfo *info; |
| 362 | uint64_t progress_current, progress_total; |
| 363 | const BlockJobDriver *drv = block_job_driver(job); |
| 364 | |
| 365 | GLOBAL_STATE_CODE(); |
| 366 | |
| 367 | if (block_job_is_internal(job)) { |
| 368 | error_setg(errp, "Cannot query QEMU internal jobs"); |
| 369 | return NULL; |
| 370 | } |
| 371 | |
| 372 | progress_get_snapshot(&job->job.progress, &progress_current, |
| 373 | &progress_total); |
| 374 | |
| 375 | info = g_new0(BlockJobInfo, 1); |
| 376 | info->type = job_type(&job->job); |
| 377 | info->device = g_strdup(job->job.id); |
| 378 | info->busy = job->job.busy; |
| 379 | info->paused = job->job.pause_count > 0; |
| 380 | info->offset = progress_current; |
| 381 | info->len = progress_total; |
| 382 | info->speed = job->speed; |
| 383 | info->io_status = job->iostatus; |
| 384 | info->ready = job_is_ready_locked(&job->job), |
| 385 | info->status = job->job.status; |
| 386 | info->auto_finalize = job->job.auto_finalize; |
| 387 | info->auto_dismiss = job->job.auto_dismiss; |
| 388 | if (job->job.ret) { |
| 389 | info->error = job->job.err ? |
| 390 | g_strdup(error_get_pretty(job->job.err)) : |
| 391 | g_strdup(strerror(-job->job.ret)); |
| 392 | } |
| 393 | if (drv->query) { |
| 394 | job_unlock(); |
| 395 | drv->query(job, info); |
| 396 | job_lock(); |
| 397 | } |
| 398 | return info; |
| 399 | } |
| 400 | |
| 401 | /* Called with job lock held */ |
| 402 | static void block_job_iostatus_set_err_locked(BlockJob *job, int error) |
| 403 | { |
| 404 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { |
| 405 | job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : |
| 406 | BLOCK_DEVICE_IO_STATUS_FAILED; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | /* Called with job_mutex lock held. */ |
| 411 | static void block_job_event_cancelled_locked(Notifier *n, void *opaque) |
| 412 | { |
| 413 | BlockJob *job = opaque; |
| 414 | uint64_t progress_current, progress_total; |
| 415 | |
| 416 | if (block_job_is_internal(job)) { |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | progress_get_snapshot(&job->job.progress, &progress_current, |
| 421 | &progress_total); |
| 422 | |
| 423 | qapi_event_send_block_job_cancelled(job_type(&job->job), |
| 424 | job->job.id, |
| 425 | progress_total, |
| 426 | progress_current, |
| 427 | job->speed); |
| 428 | } |
| 429 | |
| 430 | /* Called with job_mutex lock held. */ |
| 431 | static void block_job_event_completed_locked(Notifier *n, void *opaque) |
| 432 | { |
| 433 | BlockJob *job = opaque; |
| 434 | const char *msg = NULL; |
| 435 | uint64_t progress_current, progress_total; |
| 436 | |
| 437 | if (block_job_is_internal(job)) { |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | if (job->job.ret < 0) { |
| 442 | msg = error_get_pretty(job->job.err); |
| 443 | } |
| 444 | |
| 445 | progress_get_snapshot(&job->job.progress, &progress_current, |
| 446 | &progress_total); |
| 447 | |
| 448 | qapi_event_send_block_job_completed(job_type(&job->job), |
| 449 | job->job.id, |
| 450 | progress_total, |
| 451 | progress_current, |
| 452 | job->speed, |
| 453 | msg); |
| 454 | } |
| 455 | |
| 456 | /* Called with job_mutex lock held. */ |
| 457 | static void block_job_event_pending_locked(Notifier *n, void *opaque) |
| 458 | { |
| 459 | BlockJob *job = opaque; |
| 460 | |
| 461 | if (block_job_is_internal(job)) { |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | qapi_event_send_block_job_pending(job_type(&job->job), |
| 466 | job->job.id); |
| 467 | } |
| 468 | |
| 469 | /* Called with job_mutex lock held. */ |
| 470 | static void block_job_event_ready_locked(Notifier *n, void *opaque) |
| 471 | { |
| 472 | BlockJob *job = opaque; |
| 473 | uint64_t progress_current, progress_total; |
| 474 | |
| 475 | if (block_job_is_internal(job)) { |
| 476 | return; |
| 477 | } |
| 478 | |
| 479 | progress_get_snapshot(&job->job.progress, &progress_current, |
| 480 | &progress_total); |
| 481 | |
| 482 | qapi_event_send_block_job_ready(job_type(&job->job), |
| 483 | job->job.id, |
| 484 | progress_total, |
| 485 | progress_current, |
| 486 | job->speed); |
| 487 | } |
| 488 | |
| 489 | |
| 490 | void *block_job_create(const char *job_id, const BlockJobDriver *driver, |
| 491 | JobTxn *txn, BlockDriverState *bs, uint64_t perm, |
| 492 | uint64_t shared_perm, int64_t speed, int flags, |
| 493 | BlockCompletionFunc *cb, void *opaque, Error **errp) |
| 494 | { |
| 495 | BlockJob *job; |
| 496 | int ret; |
| 497 | GLOBAL_STATE_CODE(); |
| 498 | |
| 499 | bdrv_graph_wrlock_drained(); |
| 500 | |
| 501 | if (job_id == NULL && !(flags & JOB_INTERNAL)) { |
| 502 | job_id = bdrv_get_device_name(bs); |
| 503 | } |
| 504 | |
| 505 | job = job_create(job_id, &driver->job_driver, txn, bdrv_get_aio_context(bs), |
| 506 | flags, cb, opaque, errp); |
| 507 | if (job == NULL) { |
| 508 | bdrv_graph_wrunlock(); |
| 509 | return NULL; |
| 510 | } |
| 511 | |
| 512 | assert(is_block_job(&job->job)); |
| 513 | assert(job->job.driver->free == &block_job_free); |
| 514 | assert(job->job.driver->user_resume == &block_job_user_resume); |
| 515 | |
| 516 | ratelimit_init(&job->limit); |
| 517 | |
| 518 | job->finalize_cancelled_notifier.notify = block_job_event_cancelled_locked; |
| 519 | job->finalize_completed_notifier.notify = block_job_event_completed_locked; |
| 520 | job->pending_notifier.notify = block_job_event_pending_locked; |
| 521 | job->ready_notifier.notify = block_job_event_ready_locked; |
| 522 | job->idle_notifier.notify = block_job_on_idle_locked; |
| 523 | |
| 524 | WITH_JOB_LOCK_GUARD() { |
| 525 | notifier_list_add(&job->job.on_finalize_cancelled, |
| 526 | &job->finalize_cancelled_notifier); |
| 527 | notifier_list_add(&job->job.on_finalize_completed, |
| 528 | &job->finalize_completed_notifier); |
| 529 | notifier_list_add(&job->job.on_pending, &job->pending_notifier); |
| 530 | notifier_list_add(&job->job.on_ready, &job->ready_notifier); |
| 531 | notifier_list_add(&job->job.on_idle, &job->idle_notifier); |
| 532 | } |
| 533 | |
| 534 | error_setg(&job->blocker, "block device is in use by block job: %s", |
| 535 | job_type_str(&job->job)); |
| 536 | |
| 537 | ret = block_job_add_bdrv(job, "main node", bs, perm, shared_perm, errp); |
| 538 | if (ret < 0) { |
| 539 | goto fail; |
| 540 | } |
| 541 | |
| 542 | if (!block_job_set_speed(job, speed, errp)) { |
| 543 | goto fail; |
| 544 | } |
| 545 | |
| 546 | bdrv_graph_wrunlock(); |
| 547 | return job; |
| 548 | |
| 549 | fail: |
| 550 | bdrv_graph_wrunlock(); |
| 551 | job_early_fail(&job->job); |
| 552 | return NULL; |
| 553 | } |
| 554 | |
| 555 | void block_job_iostatus_reset_locked(BlockJob *job) |
| 556 | { |
| 557 | GLOBAL_STATE_CODE(); |
| 558 | if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { |
| 559 | return; |
| 560 | } |
| 561 | assert(job->job.user_paused && job->job.pause_count > 0); |
| 562 | job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; |
| 563 | } |
| 564 | |
| 565 | static void block_job_iostatus_reset(BlockJob *job) |
| 566 | { |
| 567 | JOB_LOCK_GUARD(); |
| 568 | block_job_iostatus_reset_locked(job); |
| 569 | } |
| 570 | |
| 571 | void block_job_user_resume(Job *job) |
| 572 | { |
| 573 | BlockJob *bjob = container_of(job, BlockJob, job); |
| 574 | GLOBAL_STATE_CODE(); |
| 575 | block_job_iostatus_reset(bjob); |
| 576 | } |
| 577 | |
| 578 | BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, |
| 579 | int is_read, int error) |
| 580 | { |
| 581 | BlockErrorAction action; |
| 582 | IO_CODE(); |
| 583 | |
| 584 | switch (on_err) { |
| 585 | case BLOCKDEV_ON_ERROR_ENOSPC: |
| 586 | case BLOCKDEV_ON_ERROR_AUTO: |
| 587 | action = (error == ENOSPC) ? |
| 588 | BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; |
| 589 | break; |
| 590 | case BLOCKDEV_ON_ERROR_STOP: |
| 591 | action = BLOCK_ERROR_ACTION_STOP; |
| 592 | break; |
| 593 | case BLOCKDEV_ON_ERROR_REPORT: |
| 594 | action = BLOCK_ERROR_ACTION_REPORT; |
| 595 | break; |
| 596 | case BLOCKDEV_ON_ERROR_IGNORE: |
| 597 | action = BLOCK_ERROR_ACTION_IGNORE; |
| 598 | break; |
| 599 | default: |
| 600 | abort(); |
| 601 | } |
| 602 | if (!block_job_is_internal(job)) { |
| 603 | qapi_event_send_block_job_error(job->job.id, |
| 604 | is_read ? IO_OPERATION_TYPE_READ : |
| 605 | IO_OPERATION_TYPE_WRITE, |
| 606 | action); |
| 607 | } |
| 608 | if (action == BLOCK_ERROR_ACTION_STOP) { |
| 609 | WITH_JOB_LOCK_GUARD() { |
| 610 | if (!job->job.user_paused) { |
| 611 | job_pause_locked(&job->job); |
| 612 | /* |
| 613 | * make the pause user visible, which will be |
| 614 | * resumed from QMP. |
| 615 | */ |
| 616 | job->job.user_paused = true; |
| 617 | } |
| 618 | block_job_iostatus_set_err_locked(job, error); |
| 619 | } |
| 620 | } |
| 621 | return action; |
| 622 | } |
| 623 | |
| 624 | AioContext *block_job_get_aio_context(BlockJob *job) |
| 625 | { |
| 626 | GLOBAL_STATE_CODE(); |
| 627 | return job->job.aio_context; |
| 628 | } |