12f0c9fe6SPaolo Bonzini /* 22f0c9fe6SPaolo Bonzini * QEMU System Emulator block driver 32f0c9fe6SPaolo Bonzini * 42f0c9fe6SPaolo Bonzini * Copyright (c) 2011 IBM Corp. 52f0c9fe6SPaolo Bonzini * Copyright (c) 2012 Red Hat, Inc. 62f0c9fe6SPaolo Bonzini * 72f0c9fe6SPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy 82f0c9fe6SPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal 92f0c9fe6SPaolo Bonzini * in the Software without restriction, including without limitation the rights 102f0c9fe6SPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 112f0c9fe6SPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is 122f0c9fe6SPaolo Bonzini * furnished to do so, subject to the following conditions: 132f0c9fe6SPaolo Bonzini * 142f0c9fe6SPaolo Bonzini * The above copyright notice and this permission notice shall be included in 152f0c9fe6SPaolo Bonzini * all copies or substantial portions of the Software. 162f0c9fe6SPaolo Bonzini * 172f0c9fe6SPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 182f0c9fe6SPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 192f0c9fe6SPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 202f0c9fe6SPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 212f0c9fe6SPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 222f0c9fe6SPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 232f0c9fe6SPaolo Bonzini * THE SOFTWARE. 242f0c9fe6SPaolo Bonzini */ 252f0c9fe6SPaolo Bonzini 26d38ea87aSPeter Maydell #include "qemu/osdep.h" 272f0c9fe6SPaolo Bonzini #include "qemu-common.h" 28737e150eSPaolo Bonzini #include "block/block.h" 29c87621eaSJohn Snow #include "block/blockjob_int.h" 30737e150eSPaolo Bonzini #include "block/block_int.h" 31c9de4050SJohn Snow #include "block/trace.h" 32373340b2SMax Reitz #include "sysemu/block-backend.h" 33e688df6bSMarkus Armbruster #include "qapi/error.h" 349af23989SMarkus Armbruster #include "qapi/qapi-events-block-core.h" 35cc7a8ea7SMarkus Armbruster #include "qapi/qmp/qerror.h" 3610817bf0SDaniel P. Berrange #include "qemu/coroutine.h" 371de7afc9SPaolo Bonzini #include "qemu/timer.h" 382f0c9fe6SPaolo Bonzini 39c55a832fSFam Zheng /* Transactional group of block jobs */ 40c55a832fSFam Zheng struct BlockJobTxn { 41c55a832fSFam Zheng 42c55a832fSFam Zheng /* Is this txn being cancelled? */ 43c55a832fSFam Zheng bool aborting; 44c55a832fSFam Zheng 45c55a832fSFam Zheng /* List of jobs */ 46c55a832fSFam Zheng QLIST_HEAD(, BlockJob) jobs; 47c55a832fSFam Zheng 48c55a832fSFam Zheng /* Reference count */ 49c55a832fSFam Zheng int refcnt; 50c55a832fSFam Zheng }; 51c55a832fSFam Zheng 5288691b37SPaolo Bonzini /* 5388691b37SPaolo Bonzini * The block job API is composed of two categories of functions. 5488691b37SPaolo Bonzini * 5588691b37SPaolo Bonzini * The first includes functions used by the monitor. The monitor is 5688691b37SPaolo Bonzini * peculiar in that it accesses the block job list with block_job_get, and 5788691b37SPaolo Bonzini * therefore needs consistency across block_job_get and the actual operation 5888691b37SPaolo Bonzini * (e.g. block_job_set_speed). The consistency is achieved with 5988691b37SPaolo Bonzini * aio_context_acquire/release. These functions are declared in blockjob.h. 6088691b37SPaolo Bonzini * 6188691b37SPaolo Bonzini * The second includes functions used by the block job drivers and sometimes 6288691b37SPaolo Bonzini * by the core block layer. These do not care about locking, because the 6388691b37SPaolo Bonzini * whole coroutine runs under the AioContext lock, and are declared in 6488691b37SPaolo Bonzini * blockjob_int.h. 6588691b37SPaolo Bonzini */ 6688691b37SPaolo Bonzini 67e7c1d78bSKevin Wolf static bool is_block_job(Job *job) 68a7112795SAlberto Garcia { 69e7c1d78bSKevin Wolf return job_type(job) == JOB_TYPE_BACKUP || 70e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_COMMIT || 71e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_MIRROR || 72e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_STREAM; 73a7112795SAlberto Garcia } 74e7c1d78bSKevin Wolf 75e7c1d78bSKevin Wolf BlockJob *block_job_next(BlockJob *bjob) 76e7c1d78bSKevin Wolf { 77e7c1d78bSKevin Wolf Job *job = bjob ? &bjob->job : NULL; 78e7c1d78bSKevin Wolf 79e7c1d78bSKevin Wolf do { 80e7c1d78bSKevin Wolf job = job_next(job); 81e7c1d78bSKevin Wolf } while (job && !is_block_job(job)); 82e7c1d78bSKevin Wolf 83e7c1d78bSKevin Wolf return job ? container_of(job, BlockJob, job) : NULL; 84a7112795SAlberto Garcia } 85a7112795SAlberto Garcia 86ffb1f10cSAlberto Garcia BlockJob *block_job_get(const char *id) 87ffb1f10cSAlberto Garcia { 88e7c1d78bSKevin Wolf Job *job = job_get(id); 89ffb1f10cSAlberto Garcia 90e7c1d78bSKevin Wolf if (job && is_block_job(job)) { 91e7c1d78bSKevin Wolf return container_of(job, BlockJob, job); 92e7c1d78bSKevin Wolf } else { 93ffb1f10cSAlberto Garcia return NULL; 94ffb1f10cSAlberto Garcia } 95e7c1d78bSKevin Wolf } 96ffb1f10cSAlberto Garcia 97c8ab5c2dSPaolo Bonzini BlockJobTxn *block_job_txn_new(void) 98c8ab5c2dSPaolo Bonzini { 99c8ab5c2dSPaolo Bonzini BlockJobTxn *txn = g_new0(BlockJobTxn, 1); 100c8ab5c2dSPaolo Bonzini QLIST_INIT(&txn->jobs); 101c8ab5c2dSPaolo Bonzini txn->refcnt = 1; 102c8ab5c2dSPaolo Bonzini return txn; 103c8ab5c2dSPaolo Bonzini } 104c8ab5c2dSPaolo Bonzini 105c8ab5c2dSPaolo Bonzini static void block_job_txn_ref(BlockJobTxn *txn) 106c8ab5c2dSPaolo Bonzini { 107c8ab5c2dSPaolo Bonzini txn->refcnt++; 108c8ab5c2dSPaolo Bonzini } 109c8ab5c2dSPaolo Bonzini 110c8ab5c2dSPaolo Bonzini void block_job_txn_unref(BlockJobTxn *txn) 111c8ab5c2dSPaolo Bonzini { 112c8ab5c2dSPaolo Bonzini if (txn && --txn->refcnt == 0) { 113c8ab5c2dSPaolo Bonzini g_free(txn); 114c8ab5c2dSPaolo Bonzini } 115c8ab5c2dSPaolo Bonzini } 116c8ab5c2dSPaolo Bonzini 117c8ab5c2dSPaolo Bonzini void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job) 118c8ab5c2dSPaolo Bonzini { 119c8ab5c2dSPaolo Bonzini if (!txn) { 120c8ab5c2dSPaolo Bonzini return; 121c8ab5c2dSPaolo Bonzini } 122c8ab5c2dSPaolo Bonzini 123c8ab5c2dSPaolo Bonzini assert(!job->txn); 124c8ab5c2dSPaolo Bonzini job->txn = txn; 125c8ab5c2dSPaolo Bonzini 126c8ab5c2dSPaolo Bonzini QLIST_INSERT_HEAD(&txn->jobs, job, txn_list); 127c8ab5c2dSPaolo Bonzini block_job_txn_ref(txn); 128c8ab5c2dSPaolo Bonzini } 129c8ab5c2dSPaolo Bonzini 130*4ad35181SKevin Wolf void block_job_txn_del_job(BlockJob *job) 131a865cebbSMarc-André Lureau { 132a865cebbSMarc-André Lureau if (job->txn) { 133a865cebbSMarc-André Lureau QLIST_REMOVE(job, txn_list); 134a865cebbSMarc-André Lureau block_job_txn_unref(job->txn); 135a865cebbSMarc-André Lureau job->txn = NULL; 136a865cebbSMarc-André Lureau } 137a865cebbSMarc-André Lureau } 138a865cebbSMarc-André Lureau 13905b0d8e3SPaolo Bonzini static void block_job_attached_aio_context(AioContext *new_context, 14005b0d8e3SPaolo Bonzini void *opaque); 14105b0d8e3SPaolo Bonzini static void block_job_detach_aio_context(void *opaque); 14205b0d8e3SPaolo Bonzini 14380fa2c75SKevin Wolf void block_job_free(Job *job) 14405b0d8e3SPaolo Bonzini { 14580fa2c75SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 14680fa2c75SKevin Wolf BlockDriverState *bs = blk_bs(bjob->blk); 14780fa2c75SKevin Wolf 14880fa2c75SKevin Wolf assert(!bjob->txn); 14980fa2c75SKevin Wolf 15005b0d8e3SPaolo Bonzini bs->job = NULL; 15180fa2c75SKevin Wolf block_job_remove_all_bdrv(bjob); 15280fa2c75SKevin Wolf blk_remove_aio_context_notifier(bjob->blk, 15305b0d8e3SPaolo Bonzini block_job_attached_aio_context, 15480fa2c75SKevin Wolf block_job_detach_aio_context, bjob); 15580fa2c75SKevin Wolf blk_unref(bjob->blk); 15680fa2c75SKevin Wolf error_free(bjob->blocker); 15705b0d8e3SPaolo Bonzini } 15805b0d8e3SPaolo Bonzini 159463e0be1SStefan Hajnoczi static void block_job_attached_aio_context(AioContext *new_context, 160463e0be1SStefan Hajnoczi void *opaque) 161463e0be1SStefan Hajnoczi { 162463e0be1SStefan Hajnoczi BlockJob *job = opaque; 163463e0be1SStefan Hajnoczi 16408be6fe2SKevin Wolf job->job.aio_context = new_context; 165463e0be1SStefan Hajnoczi if (job->driver->attached_aio_context) { 166463e0be1SStefan Hajnoczi job->driver->attached_aio_context(job, new_context); 167463e0be1SStefan Hajnoczi } 168463e0be1SStefan Hajnoczi 169b15de828SKevin Wolf job_resume(&job->job); 170463e0be1SStefan Hajnoczi } 171463e0be1SStefan Hajnoczi 172bae8196dSPaolo Bonzini static void block_job_drain(BlockJob *job) 173bae8196dSPaolo Bonzini { 174da01ff7fSKevin Wolf /* If job is !job->job.busy this kicks it into the next pause point. */ 175bae8196dSPaolo Bonzini block_job_enter(job); 176bae8196dSPaolo Bonzini 177bae8196dSPaolo Bonzini blk_drain(job->blk); 178bae8196dSPaolo Bonzini if (job->driver->drain) { 179bae8196dSPaolo Bonzini job->driver->drain(job); 180bae8196dSPaolo Bonzini } 181bae8196dSPaolo Bonzini } 182bae8196dSPaolo Bonzini 183463e0be1SStefan Hajnoczi static void block_job_detach_aio_context(void *opaque) 184463e0be1SStefan Hajnoczi { 185463e0be1SStefan Hajnoczi BlockJob *job = opaque; 186463e0be1SStefan Hajnoczi 187463e0be1SStefan Hajnoczi /* In case the job terminates during aio_poll()... */ 18880fa2c75SKevin Wolf job_ref(&job->job); 189463e0be1SStefan Hajnoczi 190b15de828SKevin Wolf job_pause(&job->job); 191463e0be1SStefan Hajnoczi 192dbe5e6c1SKevin Wolf while (!job->job.paused && !job_is_completed(&job->job)) { 193bae8196dSPaolo Bonzini block_job_drain(job); 194463e0be1SStefan Hajnoczi } 195463e0be1SStefan Hajnoczi 19608be6fe2SKevin Wolf job->job.aio_context = NULL; 19780fa2c75SKevin Wolf job_unref(&job->job); 198463e0be1SStefan Hajnoczi } 199463e0be1SStefan Hajnoczi 200f321dcb5SPaolo Bonzini static char *child_job_get_parent_desc(BdrvChild *c) 201f321dcb5SPaolo Bonzini { 202f321dcb5SPaolo Bonzini BlockJob *job = c->opaque; 203252291eaSKevin Wolf return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); 204f321dcb5SPaolo Bonzini } 205f321dcb5SPaolo Bonzini 206ad90febaSKevin Wolf static void child_job_drained_begin(BdrvChild *c) 207f321dcb5SPaolo Bonzini { 208ad90febaSKevin Wolf BlockJob *job = c->opaque; 209b15de828SKevin Wolf job_pause(&job->job); 210f321dcb5SPaolo Bonzini } 211f321dcb5SPaolo Bonzini 212ad90febaSKevin Wolf static void child_job_drained_end(BdrvChild *c) 213f321dcb5SPaolo Bonzini { 214ad90febaSKevin Wolf BlockJob *job = c->opaque; 215b15de828SKevin Wolf job_resume(&job->job); 216f321dcb5SPaolo Bonzini } 217f321dcb5SPaolo Bonzini 218ad90febaSKevin Wolf static const BdrvChildRole child_job = { 219ad90febaSKevin Wolf .get_parent_desc = child_job_get_parent_desc, 220ad90febaSKevin Wolf .drained_begin = child_job_drained_begin, 221ad90febaSKevin Wolf .drained_end = child_job_drained_end, 222ad90febaSKevin Wolf .stay_at_node = true, 223f321dcb5SPaolo Bonzini }; 224f321dcb5SPaolo Bonzini 225bbc02b90SKevin Wolf void block_job_remove_all_bdrv(BlockJob *job) 226bbc02b90SKevin Wolf { 227bbc02b90SKevin Wolf GSList *l; 228bbc02b90SKevin Wolf for (l = job->nodes; l; l = l->next) { 229bbc02b90SKevin Wolf BdrvChild *c = l->data; 230bbc02b90SKevin Wolf bdrv_op_unblock_all(c->bs, job->blocker); 231bbc02b90SKevin Wolf bdrv_root_unref_child(c); 232bbc02b90SKevin Wolf } 233bbc02b90SKevin Wolf g_slist_free(job->nodes); 234bbc02b90SKevin Wolf job->nodes = NULL; 235bbc02b90SKevin Wolf } 236bbc02b90SKevin Wolf 23776d554e2SKevin Wolf int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, 23876d554e2SKevin Wolf uint64_t perm, uint64_t shared_perm, Error **errp) 23923d402d4SAlberto Garcia { 24076d554e2SKevin Wolf BdrvChild *c; 24176d554e2SKevin Wolf 24276d554e2SKevin Wolf c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, 24376d554e2SKevin Wolf job, errp); 24476d554e2SKevin Wolf if (c == NULL) { 24576d554e2SKevin Wolf return -EPERM; 24676d554e2SKevin Wolf } 24776d554e2SKevin Wolf 24876d554e2SKevin Wolf job->nodes = g_slist_prepend(job->nodes, c); 24923d402d4SAlberto Garcia bdrv_ref(bs); 25023d402d4SAlberto Garcia bdrv_op_block_all(bs, job->blocker); 25176d554e2SKevin Wolf 25276d554e2SKevin Wolf return 0; 25323d402d4SAlberto Garcia } 25423d402d4SAlberto Garcia 255559b935fSJohn Snow bool block_job_is_internal(BlockJob *job) 256559b935fSJohn Snow { 25733e9e9bdSKevin Wolf return (job->job.id == NULL); 258559b935fSJohn Snow } 259559b935fSJohn Snow 260bd21935bSKevin Wolf const BlockJobDriver *block_job_driver(BlockJob *job) 261bd21935bSKevin Wolf { 262bd21935bSKevin Wolf return job->driver; 263bd21935bSKevin Wolf } 264bd21935bSKevin Wolf 2652da4617aSJohn Snow static int block_job_prepare(BlockJob *job) 2662da4617aSJohn Snow { 267*4ad35181SKevin Wolf if (job->job.ret == 0 && job->driver->prepare) { 268*4ad35181SKevin Wolf job->job.ret = job->driver->prepare(job); 2692da4617aSJohn Snow } 270*4ad35181SKevin Wolf return job->job.ret; 271c55a832fSFam Zheng } 272c55a832fSFam Zheng 273b76e4458SLiang Li static void block_job_cancel_async(BlockJob *job, bool force) 2744c241cf5SPaolo Bonzini { 2754c241cf5SPaolo Bonzini if (job->iostatus != BLOCK_DEVICE_IO_STATUS_OK) { 2764c241cf5SPaolo Bonzini block_job_iostatus_reset(job); 2774c241cf5SPaolo Bonzini } 278b15de828SKevin Wolf if (job->job.user_paused) { 2794c241cf5SPaolo Bonzini /* Do not call block_job_enter here, the caller will handle it. */ 280b15de828SKevin Wolf job->job.user_paused = false; 281da01ff7fSKevin Wolf job->job.pause_count--; 2824c241cf5SPaolo Bonzini } 283daa7f2f9SKevin Wolf job->job.cancelled = true; 284b76e4458SLiang Li /* To prevent 'force == false' overriding a previous 'force == true' */ 285b76e4458SLiang Li job->force |= force; 2864c241cf5SPaolo Bonzini } 2874c241cf5SPaolo Bonzini 2885f241594SJohn Snow static int block_job_txn_apply(BlockJobTxn *txn, int fn(BlockJob *), bool lock) 289efe4d4b7SJohn Snow { 290efe4d4b7SJohn Snow AioContext *ctx; 291efe4d4b7SJohn Snow BlockJob *job, *next; 2922da4617aSJohn Snow int rc = 0; 293efe4d4b7SJohn Snow 294efe4d4b7SJohn Snow QLIST_FOREACH_SAFE(job, &txn->jobs, txn_list, next) { 2955f241594SJohn Snow if (lock) { 296efe4d4b7SJohn Snow ctx = blk_get_aio_context(job->blk); 297efe4d4b7SJohn Snow aio_context_acquire(ctx); 2985f241594SJohn Snow } 2992da4617aSJohn Snow rc = fn(job); 3005f241594SJohn Snow if (lock) { 301efe4d4b7SJohn Snow aio_context_release(ctx); 3025f241594SJohn Snow } 3032da4617aSJohn Snow if (rc) { 3042da4617aSJohn Snow break; 305efe4d4b7SJohn Snow } 306efe4d4b7SJohn Snow } 3072da4617aSJohn Snow return rc; 3082da4617aSJohn Snow } 309efe4d4b7SJohn Snow 310c8ab5c2dSPaolo Bonzini static int block_job_finish_sync(BlockJob *job, 311c8ab5c2dSPaolo Bonzini void (*finish)(BlockJob *, Error **errp), 312c8ab5c2dSPaolo Bonzini Error **errp) 313c8ab5c2dSPaolo Bonzini { 314c8ab5c2dSPaolo Bonzini Error *local_err = NULL; 315c8ab5c2dSPaolo Bonzini int ret; 316c8ab5c2dSPaolo Bonzini 317c8ab5c2dSPaolo Bonzini assert(blk_bs(job->blk)->job == job); 318c8ab5c2dSPaolo Bonzini 31980fa2c75SKevin Wolf job_ref(&job->job); 320c8ab5c2dSPaolo Bonzini 3214fb588e9SPaolo Bonzini if (finish) { 322c8ab5c2dSPaolo Bonzini finish(job, &local_err); 3234fb588e9SPaolo Bonzini } 324c8ab5c2dSPaolo Bonzini if (local_err) { 325c8ab5c2dSPaolo Bonzini error_propagate(errp, local_err); 32680fa2c75SKevin Wolf job_unref(&job->job); 327c8ab5c2dSPaolo Bonzini return -EBUSY; 328c8ab5c2dSPaolo Bonzini } 329c8ab5c2dSPaolo Bonzini /* block_job_drain calls block_job_enter, and it should be enough to 330c8ab5c2dSPaolo Bonzini * induce progress until the job completes or moves to the main thread. 331c8ab5c2dSPaolo Bonzini */ 332dbe5e6c1SKevin Wolf while (!job->job.deferred_to_main_loop && !job_is_completed(&job->job)) { 333c8ab5c2dSPaolo Bonzini block_job_drain(job); 334c8ab5c2dSPaolo Bonzini } 335dbe5e6c1SKevin Wolf while (!job_is_completed(&job->job)) { 336c8ab5c2dSPaolo Bonzini aio_poll(qemu_get_aio_context(), true); 337c8ab5c2dSPaolo Bonzini } 338*4ad35181SKevin Wolf ret = (job_is_cancelled(&job->job) && job->job.ret == 0) 339*4ad35181SKevin Wolf ? -ECANCELED : job->job.ret; 34080fa2c75SKevin Wolf job_unref(&job->job); 341c8ab5c2dSPaolo Bonzini return ret; 342c8ab5c2dSPaolo Bonzini } 343c8ab5c2dSPaolo Bonzini 344c55a832fSFam Zheng static void block_job_completed_txn_abort(BlockJob *job) 345c55a832fSFam Zheng { 346c55a832fSFam Zheng AioContext *ctx; 347c55a832fSFam Zheng BlockJobTxn *txn = job->txn; 3484fb588e9SPaolo Bonzini BlockJob *other_job; 349c55a832fSFam Zheng 350c55a832fSFam Zheng if (txn->aborting) { 351c55a832fSFam Zheng /* 352c55a832fSFam Zheng * We are cancelled by another job, which will handle everything. 353c55a832fSFam Zheng */ 354c55a832fSFam Zheng return; 355c55a832fSFam Zheng } 356c55a832fSFam Zheng txn->aborting = true; 3574fb588e9SPaolo Bonzini block_job_txn_ref(txn); 3584fb588e9SPaolo Bonzini 359c55a832fSFam Zheng /* We are the first failed job. Cancel other jobs. */ 360c55a832fSFam Zheng QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 361b6d2e599SKevin Wolf ctx = blk_get_aio_context(other_job->blk); 362c55a832fSFam Zheng aio_context_acquire(ctx); 363c55a832fSFam Zheng } 3644fb588e9SPaolo Bonzini 3654fb588e9SPaolo Bonzini /* Other jobs are effectively cancelled by us, set the status for 366c55a832fSFam Zheng * them; this job, however, may or may not be cancelled, depending 367c55a832fSFam Zheng * on the caller, so leave it. */ 3684fb588e9SPaolo Bonzini QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 369c55a832fSFam Zheng if (other_job != job) { 370b76e4458SLiang Li block_job_cancel_async(other_job, false); 371c55a832fSFam Zheng } 372c55a832fSFam Zheng } 3734fb588e9SPaolo Bonzini while (!QLIST_EMPTY(&txn->jobs)) { 3744fb588e9SPaolo Bonzini other_job = QLIST_FIRST(&txn->jobs); 375b6d2e599SKevin Wolf ctx = blk_get_aio_context(other_job->blk); 376dbe5e6c1SKevin Wolf if (!job_is_completed(&other_job->job)) { 377daa7f2f9SKevin Wolf assert(job_is_cancelled(&other_job->job)); 3784fb588e9SPaolo Bonzini block_job_finish_sync(other_job, NULL, NULL); 3794fb588e9SPaolo Bonzini } 380*4ad35181SKevin Wolf job_finalize_single(&other_job->job); 381c55a832fSFam Zheng aio_context_release(ctx); 382c55a832fSFam Zheng } 3834fb588e9SPaolo Bonzini 3844fb588e9SPaolo Bonzini block_job_txn_unref(txn); 385c55a832fSFam Zheng } 386c55a832fSFam Zheng 38711b61fbcSJohn Snow static int block_job_needs_finalize(BlockJob *job) 38811b61fbcSJohn Snow { 389bb02b65cSKevin Wolf return !job->job.auto_finalize; 39011b61fbcSJohn Snow } 39111b61fbcSJohn Snow 392*4ad35181SKevin Wolf static int block_job_finalize_single(BlockJob *job) 393*4ad35181SKevin Wolf { 394*4ad35181SKevin Wolf return job_finalize_single(&job->job); 395*4ad35181SKevin Wolf } 396*4ad35181SKevin Wolf 39711b61fbcSJohn Snow static void block_job_do_finalize(BlockJob *job) 39811b61fbcSJohn Snow { 39911b61fbcSJohn Snow int rc; 40011b61fbcSJohn Snow assert(job && job->txn); 40111b61fbcSJohn Snow 40211b61fbcSJohn Snow /* prepare the transaction to complete */ 40311b61fbcSJohn Snow rc = block_job_txn_apply(job->txn, block_job_prepare, true); 40411b61fbcSJohn Snow if (rc) { 40511b61fbcSJohn Snow block_job_completed_txn_abort(job); 40611b61fbcSJohn Snow } else { 40711b61fbcSJohn Snow block_job_txn_apply(job->txn, block_job_finalize_single, true); 40811b61fbcSJohn Snow } 40911b61fbcSJohn Snow } 41011b61fbcSJohn Snow 4115d4f3769SKevin Wolf static int block_job_transition_to_pending(BlockJob *job) 4125d4f3769SKevin Wolf { 4135d4f3769SKevin Wolf job_state_transition(&job->job, JOB_STATUS_PENDING); 4145d4f3769SKevin Wolf if (!job->job.auto_finalize) { 415139a9f02SKevin Wolf job_event_pending(&job->job); 4165d4f3769SKevin Wolf } 4175d4f3769SKevin Wolf return 0; 4185d4f3769SKevin Wolf } 4195d4f3769SKevin Wolf 420c55a832fSFam Zheng static void block_job_completed_txn_success(BlockJob *job) 421c55a832fSFam Zheng { 422c55a832fSFam Zheng BlockJobTxn *txn = job->txn; 423efe4d4b7SJohn Snow BlockJob *other_job; 4242da4617aSJohn Snow 425a50c2ab8SKevin Wolf job_state_transition(&job->job, JOB_STATUS_WAITING); 426e8af5686SJohn Snow 427c55a832fSFam Zheng /* 428c55a832fSFam Zheng * Successful completion, see if there are other running jobs in this 429c55a832fSFam Zheng * txn. 430c55a832fSFam Zheng */ 431c55a832fSFam Zheng QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 432dbe5e6c1SKevin Wolf if (!job_is_completed(&other_job->job)) { 433c55a832fSFam Zheng return; 434c55a832fSFam Zheng } 435*4ad35181SKevin Wolf assert(other_job->job.ret == 0); 436c55a832fSFam Zheng } 4372da4617aSJohn Snow 4385d4f3769SKevin Wolf block_job_txn_apply(txn, block_job_transition_to_pending, false); 43911b61fbcSJohn Snow 44011b61fbcSJohn Snow /* If no jobs need manual finalization, automatically do so */ 44111b61fbcSJohn Snow if (block_job_txn_apply(txn, block_job_needs_finalize, false) == 0) { 44211b61fbcSJohn Snow block_job_do_finalize(job); 44311b61fbcSJohn Snow } 444c55a832fSFam Zheng } 445c55a832fSFam Zheng 446da01ff7fSKevin Wolf /* Assumes the job_mutex is held */ 447da01ff7fSKevin Wolf static bool job_timer_pending(Job *job) 448da01ff7fSKevin Wolf { 449da01ff7fSKevin Wolf return timer_pending(&job->sleep_timer); 450da01ff7fSKevin Wolf } 451da01ff7fSKevin Wolf 4522f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 4532f0c9fe6SPaolo Bonzini { 454aa9ef2e6SJohn Snow int64_t old_speed = job->speed; 4552f0c9fe6SPaolo Bonzini 456a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { 4570ec4dfb8SJohn Snow return; 4580ec4dfb8SJohn Snow } 45918bb6928SKevin Wolf if (speed < 0) { 46018bb6928SKevin Wolf error_setg(errp, QERR_INVALID_PARAMETER, "speed"); 4612f0c9fe6SPaolo Bonzini return; 4622f0c9fe6SPaolo Bonzini } 4632f0c9fe6SPaolo Bonzini 46418bb6928SKevin Wolf ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); 46518bb6928SKevin Wolf 4662f0c9fe6SPaolo Bonzini job->speed = speed; 467d4fce188SJohn Snow if (speed && speed <= old_speed) { 468aa9ef2e6SJohn Snow return; 469aa9ef2e6SJohn Snow } 470aa9ef2e6SJohn Snow 471aa9ef2e6SJohn Snow /* kick only if a timer is pending */ 472da01ff7fSKevin Wolf job_enter_cond(&job->job, job_timer_pending); 4732f0c9fe6SPaolo Bonzini } 4742f0c9fe6SPaolo Bonzini 475dee81d51SKevin Wolf int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) 476dee81d51SKevin Wolf { 477dee81d51SKevin Wolf if (!job->speed) { 478dee81d51SKevin Wolf return 0; 479dee81d51SKevin Wolf } 480dee81d51SKevin Wolf 481dee81d51SKevin Wolf return ratelimit_calculate_delay(&job->limit, n); 482dee81d51SKevin Wolf } 483dee81d51SKevin Wolf 484aeae883bSPaolo Bonzini void block_job_complete(BlockJob *job, Error **errp) 485aeae883bSPaolo Bonzini { 486559b935fSJohn Snow /* Should not be reachable via external interface for internal jobs */ 48733e9e9bdSKevin Wolf assert(job->job.id); 488a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_COMPLETE, errp)) { 4890ec4dfb8SJohn Snow return; 4900ec4dfb8SJohn Snow } 491da01ff7fSKevin Wolf if (job->job.pause_count || job_is_cancelled(&job->job) || 492daa7f2f9SKevin Wolf !job->driver->complete) 493daa7f2f9SKevin Wolf { 4949df229c3SAlberto Garcia error_setg(errp, "The active block job '%s' cannot be completed", 49533e9e9bdSKevin Wolf job->job.id); 496aeae883bSPaolo Bonzini return; 497aeae883bSPaolo Bonzini } 498aeae883bSPaolo Bonzini 4993fc4b10aSFam Zheng job->driver->complete(job, errp); 500aeae883bSPaolo Bonzini } 501aeae883bSPaolo Bonzini 50211b61fbcSJohn Snow void block_job_finalize(BlockJob *job, Error **errp) 50311b61fbcSJohn Snow { 50433e9e9bdSKevin Wolf assert(job && job->job.id); 505a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_FINALIZE, errp)) { 50611b61fbcSJohn Snow return; 50711b61fbcSJohn Snow } 50811b61fbcSJohn Snow block_job_do_finalize(job); 50911b61fbcSJohn Snow } 51011b61fbcSJohn Snow 51175f71059SJohn Snow void block_job_dismiss(BlockJob **jobptr, Error **errp) 51275f71059SJohn Snow { 51375f71059SJohn Snow BlockJob *job = *jobptr; 51475f71059SJohn Snow /* similarly to _complete, this is QMP-interface only. */ 51533e9e9bdSKevin Wolf assert(job->job.id); 516a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_DISMISS, errp)) { 51775f71059SJohn Snow return; 51875f71059SJohn Snow } 51975f71059SJohn Snow 520*4ad35181SKevin Wolf job_do_dismiss(&job->job); 52175f71059SJohn Snow *jobptr = NULL; 52275f71059SJohn Snow } 52375f71059SJohn Snow 524b76e4458SLiang Li void block_job_cancel(BlockJob *job, bool force) 5258acc72a4SPaolo Bonzini { 526a50c2ab8SKevin Wolf if (job->job.status == JOB_STATUS_CONCLUDED) { 527*4ad35181SKevin Wolf job_do_dismiss(&job->job); 52811b61fbcSJohn Snow return; 52911b61fbcSJohn Snow } 530b76e4458SLiang Li block_job_cancel_async(job, force); 531da01ff7fSKevin Wolf if (!job_started(&job->job)) { 5325ccac6f1SJohn Snow block_job_completed(job, -ECANCELED); 5331908a559SKevin Wolf } else if (job->job.deferred_to_main_loop) { 53411b61fbcSJohn Snow block_job_completed_txn_abort(job); 53511b61fbcSJohn Snow } else { 53611b61fbcSJohn Snow block_job_enter(job); 5375ccac6f1SJohn Snow } 5388acc72a4SPaolo Bonzini } 5398acc72a4SPaolo Bonzini 540b76e4458SLiang Li void block_job_user_cancel(BlockJob *job, bool force, Error **errp) 5410ec4dfb8SJohn Snow { 542a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_CANCEL, errp)) { 5430ec4dfb8SJohn Snow return; 5440ec4dfb8SJohn Snow } 545b76e4458SLiang Li block_job_cancel(job, force); 5460ec4dfb8SJohn Snow } 5470ec4dfb8SJohn Snow 548345f9e1bSMax Reitz /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be 549345f9e1bSMax Reitz * used with block_job_finish_sync() without the need for (rather nasty) 550345f9e1bSMax Reitz * function pointer casts there. */ 551345f9e1bSMax Reitz static void block_job_cancel_err(BlockJob *job, Error **errp) 552345f9e1bSMax Reitz { 553b76e4458SLiang Li block_job_cancel(job, false); 554345f9e1bSMax Reitz } 555345f9e1bSMax Reitz 556345f9e1bSMax Reitz int block_job_cancel_sync(BlockJob *job) 557345f9e1bSMax Reitz { 558345f9e1bSMax Reitz return block_job_finish_sync(job, &block_job_cancel_err, NULL); 559345f9e1bSMax Reitz } 560345f9e1bSMax Reitz 561a1a2af07SKevin Wolf void block_job_cancel_sync_all(void) 562a1a2af07SKevin Wolf { 563a1a2af07SKevin Wolf BlockJob *job; 564a1a2af07SKevin Wolf AioContext *aio_context; 565a1a2af07SKevin Wolf 566e7c1d78bSKevin Wolf while ((job = block_job_next(NULL))) { 567b6d2e599SKevin Wolf aio_context = blk_get_aio_context(job->blk); 568a1a2af07SKevin Wolf aio_context_acquire(aio_context); 569a1a2af07SKevin Wolf block_job_cancel_sync(job); 570a1a2af07SKevin Wolf aio_context_release(aio_context); 571a1a2af07SKevin Wolf } 572a1a2af07SKevin Wolf } 573a1a2af07SKevin Wolf 574345f9e1bSMax Reitz int block_job_complete_sync(BlockJob *job, Error **errp) 575345f9e1bSMax Reitz { 576345f9e1bSMax Reitz return block_job_finish_sync(job, &block_job_complete, errp); 577345f9e1bSMax Reitz } 578345f9e1bSMax Reitz 57905df8a6aSKevin Wolf void block_job_progress_update(BlockJob *job, uint64_t done) 58005df8a6aSKevin Wolf { 58105df8a6aSKevin Wolf job->offset += done; 58205df8a6aSKevin Wolf } 58305df8a6aSKevin Wolf 58405df8a6aSKevin Wolf void block_job_progress_set_remaining(BlockJob *job, uint64_t remaining) 58505df8a6aSKevin Wolf { 58605df8a6aSKevin Wolf job->len = job->offset + remaining; 58705df8a6aSKevin Wolf } 58805df8a6aSKevin Wolf 589559b935fSJohn Snow BlockJobInfo *block_job_query(BlockJob *job, Error **errp) 59030e628b7SPaolo Bonzini { 591559b935fSJohn Snow BlockJobInfo *info; 592559b935fSJohn Snow 593559b935fSJohn Snow if (block_job_is_internal(job)) { 594559b935fSJohn Snow error_setg(errp, "Cannot query QEMU internal jobs"); 595559b935fSJohn Snow return NULL; 596559b935fSJohn Snow } 597559b935fSJohn Snow info = g_new0(BlockJobInfo, 1); 598252291eaSKevin Wolf info->type = g_strdup(job_type_str(&job->job)); 59933e9e9bdSKevin Wolf info->device = g_strdup(job->job.id); 60030e628b7SPaolo Bonzini info->len = job->len; 601da01ff7fSKevin Wolf info->busy = atomic_read(&job->job.busy); 602da01ff7fSKevin Wolf info->paused = job->job.pause_count > 0; 60330e628b7SPaolo Bonzini info->offset = job->offset; 60430e628b7SPaolo Bonzini info->speed = job->speed; 60532c81a4aSPaolo Bonzini info->io_status = job->iostatus; 606ef6dbf1eSMax Reitz info->ready = job->ready; 607a50c2ab8SKevin Wolf info->status = job->job.status; 608bb02b65cSKevin Wolf info->auto_finalize = job->job.auto_finalize; 609bb02b65cSKevin Wolf info->auto_dismiss = job->job.auto_dismiss; 610*4ad35181SKevin Wolf info->has_error = job->job.ret != 0; 611*4ad35181SKevin Wolf info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; 61230e628b7SPaolo Bonzini return info; 61330e628b7SPaolo Bonzini } 61432c81a4aSPaolo Bonzini 61532c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 61632c81a4aSPaolo Bonzini { 61732c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 61832c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 61932c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 62032c81a4aSPaolo Bonzini } 62132c81a4aSPaolo Bonzini } 62232c81a4aSPaolo Bonzini 623139a9f02SKevin Wolf static void block_job_event_cancelled(Notifier *n, void *opaque) 624a66a2a36SPaolo Bonzini { 625139a9f02SKevin Wolf BlockJob *job = opaque; 626139a9f02SKevin Wolf 627559b935fSJohn Snow if (block_job_is_internal(job)) { 628559b935fSJohn Snow return; 629559b935fSJohn Snow } 630559b935fSJohn Snow 631252291eaSKevin Wolf qapi_event_send_block_job_cancelled(job_type(&job->job), 63233e9e9bdSKevin Wolf job->job.id, 633a66a2a36SPaolo Bonzini job->len, 634a66a2a36SPaolo Bonzini job->offset, 635bcada37bSWenchao Xia job->speed, 636bcada37bSWenchao Xia &error_abort); 637a66a2a36SPaolo Bonzini } 638a66a2a36SPaolo Bonzini 639139a9f02SKevin Wolf static void block_job_event_completed(Notifier *n, void *opaque) 640a66a2a36SPaolo Bonzini { 641139a9f02SKevin Wolf BlockJob *job = opaque; 642139a9f02SKevin Wolf const char *msg = NULL; 643139a9f02SKevin Wolf 644559b935fSJohn Snow if (block_job_is_internal(job)) { 645559b935fSJohn Snow return; 646559b935fSJohn Snow } 647559b935fSJohn Snow 648*4ad35181SKevin Wolf if (job->job.ret < 0) { 649*4ad35181SKevin Wolf msg = strerror(-job->job.ret); 650139a9f02SKevin Wolf } 651139a9f02SKevin Wolf 652252291eaSKevin Wolf qapi_event_send_block_job_completed(job_type(&job->job), 65333e9e9bdSKevin Wolf job->job.id, 654bcada37bSWenchao Xia job->len, 655bcada37bSWenchao Xia job->offset, 656bcada37bSWenchao Xia job->speed, 657bcada37bSWenchao Xia !!msg, 658bcada37bSWenchao Xia msg, 659bcada37bSWenchao Xia &error_abort); 660bcada37bSWenchao Xia } 661bcada37bSWenchao Xia 662139a9f02SKevin Wolf static void block_job_event_pending(Notifier *n, void *opaque) 6635f241594SJohn Snow { 664139a9f02SKevin Wolf BlockJob *job = opaque; 665139a9f02SKevin Wolf 6665d4f3769SKevin Wolf if (block_job_is_internal(job)) { 6675d4f3769SKevin Wolf return; 6685d4f3769SKevin Wolf } 6695d4f3769SKevin Wolf 670252291eaSKevin Wolf qapi_event_send_block_job_pending(job_type(&job->job), 67133e9e9bdSKevin Wolf job->job.id, 6725f241594SJohn Snow &error_abort); 6735f241594SJohn Snow } 6745f241594SJohn Snow 67588691b37SPaolo Bonzini /* 67688691b37SPaolo Bonzini * API for block job drivers and the block layer. These functions are 67788691b37SPaolo Bonzini * declared in blockjob_int.h. 67888691b37SPaolo Bonzini */ 67988691b37SPaolo Bonzini 68088691b37SPaolo Bonzini void *block_job_create(const char *job_id, const BlockJobDriver *driver, 68175859b94SJohn Snow BlockJobTxn *txn, BlockDriverState *bs, uint64_t perm, 68288691b37SPaolo Bonzini uint64_t shared_perm, int64_t speed, int flags, 68388691b37SPaolo Bonzini BlockCompletionFunc *cb, void *opaque, Error **errp) 68488691b37SPaolo Bonzini { 68588691b37SPaolo Bonzini BlockBackend *blk; 68688691b37SPaolo Bonzini BlockJob *job; 68788691b37SPaolo Bonzini int ret; 68888691b37SPaolo Bonzini 68988691b37SPaolo Bonzini if (bs->job) { 69088691b37SPaolo Bonzini error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 69188691b37SPaolo Bonzini return NULL; 69288691b37SPaolo Bonzini } 69388691b37SPaolo Bonzini 694bb02b65cSKevin Wolf if (job_id == NULL && !(flags & JOB_INTERNAL)) { 69588691b37SPaolo Bonzini job_id = bdrv_get_device_name(bs); 69688691b37SPaolo Bonzini } 69788691b37SPaolo Bonzini 69888691b37SPaolo Bonzini blk = blk_new(perm, shared_perm); 69988691b37SPaolo Bonzini ret = blk_insert_bs(blk, bs, errp); 70088691b37SPaolo Bonzini if (ret < 0) { 70188691b37SPaolo Bonzini blk_unref(blk); 70288691b37SPaolo Bonzini return NULL; 70388691b37SPaolo Bonzini } 70488691b37SPaolo Bonzini 70508be6fe2SKevin Wolf job = job_create(job_id, &driver->job_driver, blk_get_aio_context(blk), 706*4ad35181SKevin Wolf flags, cb, opaque, errp); 70733e9e9bdSKevin Wolf if (job == NULL) { 70833e9e9bdSKevin Wolf blk_unref(blk); 70933e9e9bdSKevin Wolf return NULL; 71033e9e9bdSKevin Wolf } 71133e9e9bdSKevin Wolf 712e7c1d78bSKevin Wolf assert(is_block_job(&job->job)); 71380fa2c75SKevin Wolf assert(job->job.driver->free == &block_job_free); 714b15de828SKevin Wolf assert(job->job.driver->user_resume == &block_job_user_resume); 715e7c1d78bSKevin Wolf 71688691b37SPaolo Bonzini job->driver = driver; 71788691b37SPaolo Bonzini job->blk = blk; 71888691b37SPaolo Bonzini 719139a9f02SKevin Wolf job->finalize_cancelled_notifier.notify = block_job_event_cancelled; 720139a9f02SKevin Wolf job->finalize_completed_notifier.notify = block_job_event_completed; 721139a9f02SKevin Wolf job->pending_notifier.notify = block_job_event_pending; 722139a9f02SKevin Wolf 723139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_cancelled, 724139a9f02SKevin Wolf &job->finalize_cancelled_notifier); 725139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_completed, 726139a9f02SKevin Wolf &job->finalize_completed_notifier); 727139a9f02SKevin Wolf notifier_list_add(&job->job.on_pending, &job->pending_notifier); 728139a9f02SKevin Wolf 72988691b37SPaolo Bonzini error_setg(&job->blocker, "block device is in use by block job: %s", 730252291eaSKevin Wolf job_type_str(&job->job)); 73188691b37SPaolo Bonzini block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); 73288691b37SPaolo Bonzini bs->job = job; 73388691b37SPaolo Bonzini 73488691b37SPaolo Bonzini bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 73588691b37SPaolo Bonzini 73688691b37SPaolo Bonzini blk_add_aio_context_notifier(blk, block_job_attached_aio_context, 73788691b37SPaolo Bonzini block_job_detach_aio_context, job); 73888691b37SPaolo Bonzini 73988691b37SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 74088691b37SPaolo Bonzini if (speed != 0) { 74188691b37SPaolo Bonzini Error *local_err = NULL; 74288691b37SPaolo Bonzini 74388691b37SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 74488691b37SPaolo Bonzini if (local_err) { 745*4ad35181SKevin Wolf job_early_fail(&job->job); 74688691b37SPaolo Bonzini error_propagate(errp, local_err); 74788691b37SPaolo Bonzini return NULL; 74888691b37SPaolo Bonzini } 74988691b37SPaolo Bonzini } 75075859b94SJohn Snow 75175859b94SJohn Snow /* Single jobs are modeled as single-job transactions for sake of 75275859b94SJohn Snow * consolidating the job management logic */ 75375859b94SJohn Snow if (!txn) { 75475859b94SJohn Snow txn = block_job_txn_new(); 75575859b94SJohn Snow block_job_txn_add_job(txn, job); 75675859b94SJohn Snow block_job_txn_unref(txn); 75775859b94SJohn Snow } else { 75875859b94SJohn Snow block_job_txn_add_job(txn, job); 75975859b94SJohn Snow } 76075859b94SJohn Snow 76188691b37SPaolo Bonzini return job; 76288691b37SPaolo Bonzini } 76388691b37SPaolo Bonzini 76488691b37SPaolo Bonzini void block_job_completed(BlockJob *job, int ret) 76588691b37SPaolo Bonzini { 766dbe5e6c1SKevin Wolf assert(job && job->txn && !job_is_completed(&job->job)); 76788691b37SPaolo Bonzini assert(blk_bs(job->blk)->job == job); 768*4ad35181SKevin Wolf job->job.ret = ret; 769*4ad35181SKevin Wolf job_update_rc(&job->job); 770*4ad35181SKevin Wolf trace_block_job_completed(job, ret, job->job.ret); 771*4ad35181SKevin Wolf if (job->job.ret) { 77288691b37SPaolo Bonzini block_job_completed_txn_abort(job); 77388691b37SPaolo Bonzini } else { 77488691b37SPaolo Bonzini block_job_completed_txn_success(job); 77588691b37SPaolo Bonzini } 77688691b37SPaolo Bonzini } 77788691b37SPaolo Bonzini 778aa9ef2e6SJohn Snow void block_job_enter(BlockJob *job) 779aa9ef2e6SJohn Snow { 780da01ff7fSKevin Wolf job_enter_cond(&job->job, NULL); 781aa9ef2e6SJohn Snow } 782aa9ef2e6SJohn Snow 78388691b37SPaolo Bonzini void block_job_yield(BlockJob *job) 78488691b37SPaolo Bonzini { 785da01ff7fSKevin Wolf assert(job->job.busy); 78688691b37SPaolo Bonzini 78788691b37SPaolo Bonzini /* Check cancellation *before* setting busy = false, too! */ 788daa7f2f9SKevin Wolf if (job_is_cancelled(&job->job)) { 78988691b37SPaolo Bonzini return; 79088691b37SPaolo Bonzini } 79188691b37SPaolo Bonzini 792da01ff7fSKevin Wolf if (!job_should_pause(&job->job)) { 793da01ff7fSKevin Wolf job_do_yield(&job->job, -1); 79488691b37SPaolo Bonzini } 79588691b37SPaolo Bonzini 796da01ff7fSKevin Wolf job_pause_point(&job->job); 79788691b37SPaolo Bonzini } 79888691b37SPaolo Bonzini 7992caf63a9SPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 8002caf63a9SPaolo Bonzini { 8014c241cf5SPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 8024c241cf5SPaolo Bonzini return; 8034c241cf5SPaolo Bonzini } 804b15de828SKevin Wolf assert(job->job.user_paused && job->job.pause_count > 0); 8052caf63a9SPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 8062caf63a9SPaolo Bonzini } 8072caf63a9SPaolo Bonzini 808b15de828SKevin Wolf void block_job_user_resume(Job *job) 809b15de828SKevin Wolf { 810b15de828SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 811b15de828SKevin Wolf block_job_iostatus_reset(bjob); 812b15de828SKevin Wolf } 813b15de828SKevin Wolf 814bcada37bSWenchao Xia void block_job_event_ready(BlockJob *job) 815bcada37bSWenchao Xia { 816a50c2ab8SKevin Wolf job_state_transition(&job->job, JOB_STATUS_READY); 817ef6dbf1eSMax Reitz job->ready = true; 818ef6dbf1eSMax Reitz 819559b935fSJohn Snow if (block_job_is_internal(job)) { 820559b935fSJohn Snow return; 821559b935fSJohn Snow } 822559b935fSJohn Snow 823252291eaSKevin Wolf qapi_event_send_block_job_ready(job_type(&job->job), 82433e9e9bdSKevin Wolf job->job.id, 825518848a2SMarkus Armbruster job->len, 826518848a2SMarkus Armbruster job->offset, 827518848a2SMarkus Armbruster job->speed, &error_abort); 828a66a2a36SPaolo Bonzini } 829a66a2a36SPaolo Bonzini 83081e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 83132c81a4aSPaolo Bonzini int is_read, int error) 83232c81a4aSPaolo Bonzini { 83332c81a4aSPaolo Bonzini BlockErrorAction action; 83432c81a4aSPaolo Bonzini 83532c81a4aSPaolo Bonzini switch (on_err) { 83632c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 8378c398252SKevin Wolf case BLOCKDEV_ON_ERROR_AUTO: 838a589569fSWenchao Xia action = (error == ENOSPC) ? 839a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 84032c81a4aSPaolo Bonzini break; 84132c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 842a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 84332c81a4aSPaolo Bonzini break; 84432c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 845a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 84632c81a4aSPaolo Bonzini break; 84732c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 848a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 84932c81a4aSPaolo Bonzini break; 85032c81a4aSPaolo Bonzini default: 85132c81a4aSPaolo Bonzini abort(); 85232c81a4aSPaolo Bonzini } 853559b935fSJohn Snow if (!block_job_is_internal(job)) { 85433e9e9bdSKevin Wolf qapi_event_send_block_job_error(job->job.id, 8555a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 8565a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 8575a2d2cbdSWenchao Xia action, &error_abort); 858559b935fSJohn Snow } 859a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 860b15de828SKevin Wolf job_pause(&job->job); 861751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 862b15de828SKevin Wolf job->job.user_paused = true; 86332c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 86432c81a4aSPaolo Bonzini } 86532c81a4aSPaolo Bonzini return action; 86632c81a4aSPaolo Bonzini } 867