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 3988691b37SPaolo Bonzini /* 4088691b37SPaolo Bonzini * The block job API is composed of two categories of functions. 4188691b37SPaolo Bonzini * 4288691b37SPaolo Bonzini * The first includes functions used by the monitor. The monitor is 4388691b37SPaolo Bonzini * peculiar in that it accesses the block job list with block_job_get, and 4488691b37SPaolo Bonzini * therefore needs consistency across block_job_get and the actual operation 4588691b37SPaolo Bonzini * (e.g. block_job_set_speed). The consistency is achieved with 4688691b37SPaolo Bonzini * aio_context_acquire/release. These functions are declared in blockjob.h. 4788691b37SPaolo Bonzini * 4888691b37SPaolo Bonzini * The second includes functions used by the block job drivers and sometimes 4988691b37SPaolo Bonzini * by the core block layer. These do not care about locking, because the 5088691b37SPaolo Bonzini * whole coroutine runs under the AioContext lock, and are declared in 5188691b37SPaolo Bonzini * blockjob_int.h. 5288691b37SPaolo Bonzini */ 5388691b37SPaolo Bonzini 54e7c1d78bSKevin Wolf static bool is_block_job(Job *job) 55a7112795SAlberto Garcia { 56e7c1d78bSKevin Wolf return job_type(job) == JOB_TYPE_BACKUP || 57e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_COMMIT || 58e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_MIRROR || 59e7c1d78bSKevin Wolf job_type(job) == JOB_TYPE_STREAM; 60a7112795SAlberto Garcia } 61e7c1d78bSKevin Wolf 62e7c1d78bSKevin Wolf BlockJob *block_job_next(BlockJob *bjob) 63e7c1d78bSKevin Wolf { 64e7c1d78bSKevin Wolf Job *job = bjob ? &bjob->job : NULL; 65e7c1d78bSKevin Wolf 66e7c1d78bSKevin Wolf do { 67e7c1d78bSKevin Wolf job = job_next(job); 68e7c1d78bSKevin Wolf } while (job && !is_block_job(job)); 69e7c1d78bSKevin Wolf 70e7c1d78bSKevin Wolf return job ? container_of(job, BlockJob, job) : NULL; 71a7112795SAlberto Garcia } 72a7112795SAlberto Garcia 73ffb1f10cSAlberto Garcia BlockJob *block_job_get(const char *id) 74ffb1f10cSAlberto Garcia { 75e7c1d78bSKevin Wolf Job *job = job_get(id); 76ffb1f10cSAlberto Garcia 77e7c1d78bSKevin Wolf if (job && is_block_job(job)) { 78e7c1d78bSKevin Wolf return container_of(job, BlockJob, job); 79e7c1d78bSKevin Wolf } else { 80ffb1f10cSAlberto Garcia return NULL; 81ffb1f10cSAlberto Garcia } 82e7c1d78bSKevin Wolf } 83ffb1f10cSAlberto Garcia 8405b0d8e3SPaolo Bonzini static void block_job_attached_aio_context(AioContext *new_context, 8505b0d8e3SPaolo Bonzini void *opaque); 8605b0d8e3SPaolo Bonzini static void block_job_detach_aio_context(void *opaque); 8705b0d8e3SPaolo Bonzini 8880fa2c75SKevin Wolf void block_job_free(Job *job) 8905b0d8e3SPaolo Bonzini { 9080fa2c75SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 9180fa2c75SKevin Wolf BlockDriverState *bs = blk_bs(bjob->blk); 9280fa2c75SKevin Wolf 9305b0d8e3SPaolo Bonzini bs->job = NULL; 9480fa2c75SKevin Wolf block_job_remove_all_bdrv(bjob); 9580fa2c75SKevin Wolf blk_remove_aio_context_notifier(bjob->blk, 9605b0d8e3SPaolo Bonzini block_job_attached_aio_context, 9780fa2c75SKevin Wolf block_job_detach_aio_context, bjob); 9880fa2c75SKevin Wolf blk_unref(bjob->blk); 9980fa2c75SKevin Wolf error_free(bjob->blocker); 10005b0d8e3SPaolo Bonzini } 10105b0d8e3SPaolo Bonzini 102463e0be1SStefan Hajnoczi static void block_job_attached_aio_context(AioContext *new_context, 103463e0be1SStefan Hajnoczi void *opaque) 104463e0be1SStefan Hajnoczi { 105463e0be1SStefan Hajnoczi BlockJob *job = opaque; 106*9f6bb4c0SKevin Wolf const JobDriver *drv = job->job.driver; 107*9f6bb4c0SKevin Wolf BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver); 108463e0be1SStefan Hajnoczi 10908be6fe2SKevin Wolf job->job.aio_context = new_context; 110*9f6bb4c0SKevin Wolf if (bjdrv->attached_aio_context) { 111*9f6bb4c0SKevin Wolf bjdrv->attached_aio_context(job, new_context); 112463e0be1SStefan Hajnoczi } 113463e0be1SStefan Hajnoczi 114b15de828SKevin Wolf job_resume(&job->job); 115463e0be1SStefan Hajnoczi } 116463e0be1SStefan Hajnoczi 117b69f777dSKevin Wolf void block_job_drain(Job *job) 118bae8196dSPaolo Bonzini { 119b69f777dSKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 120*9f6bb4c0SKevin Wolf const JobDriver *drv = job->driver; 121*9f6bb4c0SKevin Wolf BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver); 122bae8196dSPaolo Bonzini 123b69f777dSKevin Wolf blk_drain(bjob->blk); 124*9f6bb4c0SKevin Wolf if (bjdrv->drain) { 125*9f6bb4c0SKevin Wolf bjdrv->drain(bjob); 126bae8196dSPaolo Bonzini } 127bae8196dSPaolo Bonzini } 128bae8196dSPaolo Bonzini 129463e0be1SStefan Hajnoczi static void block_job_detach_aio_context(void *opaque) 130463e0be1SStefan Hajnoczi { 131463e0be1SStefan Hajnoczi BlockJob *job = opaque; 132463e0be1SStefan Hajnoczi 133463e0be1SStefan Hajnoczi /* In case the job terminates during aio_poll()... */ 13480fa2c75SKevin Wolf job_ref(&job->job); 135463e0be1SStefan Hajnoczi 136b15de828SKevin Wolf job_pause(&job->job); 137463e0be1SStefan Hajnoczi 138dbe5e6c1SKevin Wolf while (!job->job.paused && !job_is_completed(&job->job)) { 139b69f777dSKevin Wolf job_drain(&job->job); 140463e0be1SStefan Hajnoczi } 141463e0be1SStefan Hajnoczi 14208be6fe2SKevin Wolf job->job.aio_context = NULL; 14380fa2c75SKevin Wolf job_unref(&job->job); 144463e0be1SStefan Hajnoczi } 145463e0be1SStefan Hajnoczi 146f321dcb5SPaolo Bonzini static char *child_job_get_parent_desc(BdrvChild *c) 147f321dcb5SPaolo Bonzini { 148f321dcb5SPaolo Bonzini BlockJob *job = c->opaque; 149252291eaSKevin Wolf return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); 150f321dcb5SPaolo Bonzini } 151f321dcb5SPaolo Bonzini 152ad90febaSKevin Wolf static void child_job_drained_begin(BdrvChild *c) 153f321dcb5SPaolo Bonzini { 154ad90febaSKevin Wolf BlockJob *job = c->opaque; 155b15de828SKevin Wolf job_pause(&job->job); 156f321dcb5SPaolo Bonzini } 157f321dcb5SPaolo Bonzini 158ad90febaSKevin Wolf static void child_job_drained_end(BdrvChild *c) 159f321dcb5SPaolo Bonzini { 160ad90febaSKevin Wolf BlockJob *job = c->opaque; 161b15de828SKevin Wolf job_resume(&job->job); 162f321dcb5SPaolo Bonzini } 163f321dcb5SPaolo Bonzini 164ad90febaSKevin Wolf static const BdrvChildRole child_job = { 165ad90febaSKevin Wolf .get_parent_desc = child_job_get_parent_desc, 166ad90febaSKevin Wolf .drained_begin = child_job_drained_begin, 167ad90febaSKevin Wolf .drained_end = child_job_drained_end, 168ad90febaSKevin Wolf .stay_at_node = true, 169f321dcb5SPaolo Bonzini }; 170f321dcb5SPaolo Bonzini 171bbc02b90SKevin Wolf void block_job_remove_all_bdrv(BlockJob *job) 172bbc02b90SKevin Wolf { 173bbc02b90SKevin Wolf GSList *l; 174bbc02b90SKevin Wolf for (l = job->nodes; l; l = l->next) { 175bbc02b90SKevin Wolf BdrvChild *c = l->data; 176bbc02b90SKevin Wolf bdrv_op_unblock_all(c->bs, job->blocker); 177bbc02b90SKevin Wolf bdrv_root_unref_child(c); 178bbc02b90SKevin Wolf } 179bbc02b90SKevin Wolf g_slist_free(job->nodes); 180bbc02b90SKevin Wolf job->nodes = NULL; 181bbc02b90SKevin Wolf } 182bbc02b90SKevin Wolf 18376d554e2SKevin Wolf int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, 18476d554e2SKevin Wolf uint64_t perm, uint64_t shared_perm, Error **errp) 18523d402d4SAlberto Garcia { 18676d554e2SKevin Wolf BdrvChild *c; 18776d554e2SKevin Wolf 18876d554e2SKevin Wolf c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, 18976d554e2SKevin Wolf job, errp); 19076d554e2SKevin Wolf if (c == NULL) { 19176d554e2SKevin Wolf return -EPERM; 19276d554e2SKevin Wolf } 19376d554e2SKevin Wolf 19476d554e2SKevin Wolf job->nodes = g_slist_prepend(job->nodes, c); 19523d402d4SAlberto Garcia bdrv_ref(bs); 19623d402d4SAlberto Garcia bdrv_op_block_all(bs, job->blocker); 19776d554e2SKevin Wolf 19876d554e2SKevin Wolf return 0; 19923d402d4SAlberto Garcia } 20023d402d4SAlberto Garcia 201559b935fSJohn Snow bool block_job_is_internal(BlockJob *job) 202559b935fSJohn Snow { 20333e9e9bdSKevin Wolf return (job->job.id == NULL); 204559b935fSJohn Snow } 205559b935fSJohn Snow 206bd21935bSKevin Wolf const BlockJobDriver *block_job_driver(BlockJob *job) 207bd21935bSKevin Wolf { 208*9f6bb4c0SKevin Wolf return container_of(job->job.driver, BlockJobDriver, job_driver); 209bd21935bSKevin Wolf } 210bd21935bSKevin Wolf 211da01ff7fSKevin Wolf /* Assumes the job_mutex is held */ 212da01ff7fSKevin Wolf static bool job_timer_pending(Job *job) 213da01ff7fSKevin Wolf { 214da01ff7fSKevin Wolf return timer_pending(&job->sleep_timer); 215da01ff7fSKevin Wolf } 216da01ff7fSKevin Wolf 2172f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 2182f0c9fe6SPaolo Bonzini { 219aa9ef2e6SJohn Snow int64_t old_speed = job->speed; 2202f0c9fe6SPaolo Bonzini 221a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { 2220ec4dfb8SJohn Snow return; 2230ec4dfb8SJohn Snow } 22418bb6928SKevin Wolf if (speed < 0) { 22518bb6928SKevin Wolf error_setg(errp, QERR_INVALID_PARAMETER, "speed"); 2262f0c9fe6SPaolo Bonzini return; 2272f0c9fe6SPaolo Bonzini } 2282f0c9fe6SPaolo Bonzini 22918bb6928SKevin Wolf ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); 23018bb6928SKevin Wolf 2312f0c9fe6SPaolo Bonzini job->speed = speed; 232d4fce188SJohn Snow if (speed && speed <= old_speed) { 233aa9ef2e6SJohn Snow return; 234aa9ef2e6SJohn Snow } 235aa9ef2e6SJohn Snow 236aa9ef2e6SJohn Snow /* kick only if a timer is pending */ 237da01ff7fSKevin Wolf job_enter_cond(&job->job, job_timer_pending); 2382f0c9fe6SPaolo Bonzini } 2392f0c9fe6SPaolo Bonzini 240dee81d51SKevin Wolf int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) 241dee81d51SKevin Wolf { 242dee81d51SKevin Wolf if (!job->speed) { 243dee81d51SKevin Wolf return 0; 244dee81d51SKevin Wolf } 245dee81d51SKevin Wolf 246dee81d51SKevin Wolf return ratelimit_calculate_delay(&job->limit, n); 247dee81d51SKevin Wolf } 248dee81d51SKevin Wolf 249559b935fSJohn Snow BlockJobInfo *block_job_query(BlockJob *job, Error **errp) 25030e628b7SPaolo Bonzini { 251559b935fSJohn Snow BlockJobInfo *info; 252559b935fSJohn Snow 253559b935fSJohn Snow if (block_job_is_internal(job)) { 254559b935fSJohn Snow error_setg(errp, "Cannot query QEMU internal jobs"); 255559b935fSJohn Snow return NULL; 256559b935fSJohn Snow } 257559b935fSJohn Snow info = g_new0(BlockJobInfo, 1); 258252291eaSKevin Wolf info->type = g_strdup(job_type_str(&job->job)); 25933e9e9bdSKevin Wolf info->device = g_strdup(job->job.id); 260da01ff7fSKevin Wolf info->busy = atomic_read(&job->job.busy); 261da01ff7fSKevin Wolf info->paused = job->job.pause_count > 0; 26230a5c887SKevin Wolf info->offset = job->job.progress_current; 26330a5c887SKevin Wolf info->len = job->job.progress_total; 26430e628b7SPaolo Bonzini info->speed = job->speed; 26532c81a4aSPaolo Bonzini info->io_status = job->iostatus; 266df956ae2SKevin Wolf info->ready = job_is_ready(&job->job), 267a50c2ab8SKevin Wolf info->status = job->job.status; 268bb02b65cSKevin Wolf info->auto_finalize = job->job.auto_finalize; 269bb02b65cSKevin Wolf info->auto_dismiss = job->job.auto_dismiss; 2704ad35181SKevin Wolf info->has_error = job->job.ret != 0; 2714ad35181SKevin Wolf info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; 27230e628b7SPaolo Bonzini return info; 27330e628b7SPaolo Bonzini } 27432c81a4aSPaolo Bonzini 27532c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 27632c81a4aSPaolo Bonzini { 27732c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 27832c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 27932c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 28032c81a4aSPaolo Bonzini } 28132c81a4aSPaolo Bonzini } 28232c81a4aSPaolo Bonzini 283139a9f02SKevin Wolf static void block_job_event_cancelled(Notifier *n, void *opaque) 284a66a2a36SPaolo Bonzini { 285139a9f02SKevin Wolf BlockJob *job = opaque; 286139a9f02SKevin Wolf 287559b935fSJohn Snow if (block_job_is_internal(job)) { 288559b935fSJohn Snow return; 289559b935fSJohn Snow } 290559b935fSJohn Snow 291252291eaSKevin Wolf qapi_event_send_block_job_cancelled(job_type(&job->job), 29233e9e9bdSKevin Wolf job->job.id, 29330a5c887SKevin Wolf job->job.progress_total, 29430a5c887SKevin Wolf job->job.progress_current, 295bcada37bSWenchao Xia job->speed, 296bcada37bSWenchao Xia &error_abort); 297a66a2a36SPaolo Bonzini } 298a66a2a36SPaolo Bonzini 299139a9f02SKevin Wolf static void block_job_event_completed(Notifier *n, void *opaque) 300a66a2a36SPaolo Bonzini { 301139a9f02SKevin Wolf BlockJob *job = opaque; 302139a9f02SKevin Wolf const char *msg = NULL; 303139a9f02SKevin Wolf 304559b935fSJohn Snow if (block_job_is_internal(job)) { 305559b935fSJohn Snow return; 306559b935fSJohn Snow } 307559b935fSJohn Snow 3084ad35181SKevin Wolf if (job->job.ret < 0) { 3094ad35181SKevin Wolf msg = strerror(-job->job.ret); 310139a9f02SKevin Wolf } 311139a9f02SKevin Wolf 312252291eaSKevin Wolf qapi_event_send_block_job_completed(job_type(&job->job), 31333e9e9bdSKevin Wolf job->job.id, 31430a5c887SKevin Wolf job->job.progress_total, 31530a5c887SKevin Wolf job->job.progress_current, 316bcada37bSWenchao Xia job->speed, 317bcada37bSWenchao Xia !!msg, 318bcada37bSWenchao Xia msg, 319bcada37bSWenchao Xia &error_abort); 320bcada37bSWenchao Xia } 321bcada37bSWenchao Xia 322139a9f02SKevin Wolf static void block_job_event_pending(Notifier *n, void *opaque) 3235f241594SJohn Snow { 324139a9f02SKevin Wolf BlockJob *job = opaque; 325139a9f02SKevin Wolf 3265d4f3769SKevin Wolf if (block_job_is_internal(job)) { 3275d4f3769SKevin Wolf return; 3285d4f3769SKevin Wolf } 3295d4f3769SKevin Wolf 330252291eaSKevin Wolf qapi_event_send_block_job_pending(job_type(&job->job), 33133e9e9bdSKevin Wolf job->job.id, 3325f241594SJohn Snow &error_abort); 3335f241594SJohn Snow } 3345f241594SJohn Snow 3352e1795b5SKevin Wolf static void block_job_event_ready(Notifier *n, void *opaque) 3362e1795b5SKevin Wolf { 3372e1795b5SKevin Wolf BlockJob *job = opaque; 3382e1795b5SKevin Wolf 3392e1795b5SKevin Wolf if (block_job_is_internal(job)) { 3402e1795b5SKevin Wolf return; 3412e1795b5SKevin Wolf } 3422e1795b5SKevin Wolf 3432e1795b5SKevin Wolf qapi_event_send_block_job_ready(job_type(&job->job), 3442e1795b5SKevin Wolf job->job.id, 34530a5c887SKevin Wolf job->job.progress_total, 34630a5c887SKevin Wolf job->job.progress_current, 3472e1795b5SKevin Wolf job->speed, &error_abort); 3482e1795b5SKevin Wolf } 3492e1795b5SKevin Wolf 3502e1795b5SKevin Wolf 35188691b37SPaolo Bonzini /* 35288691b37SPaolo Bonzini * API for block job drivers and the block layer. These functions are 35388691b37SPaolo Bonzini * declared in blockjob_int.h. 35488691b37SPaolo Bonzini */ 35588691b37SPaolo Bonzini 35688691b37SPaolo Bonzini void *block_job_create(const char *job_id, const BlockJobDriver *driver, 35762c9e416SKevin Wolf JobTxn *txn, BlockDriverState *bs, uint64_t perm, 35888691b37SPaolo Bonzini uint64_t shared_perm, int64_t speed, int flags, 35988691b37SPaolo Bonzini BlockCompletionFunc *cb, void *opaque, Error **errp) 36088691b37SPaolo Bonzini { 36188691b37SPaolo Bonzini BlockBackend *blk; 36288691b37SPaolo Bonzini BlockJob *job; 36388691b37SPaolo Bonzini int ret; 36488691b37SPaolo Bonzini 36588691b37SPaolo Bonzini if (bs->job) { 36688691b37SPaolo Bonzini error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 36788691b37SPaolo Bonzini return NULL; 36888691b37SPaolo Bonzini } 36988691b37SPaolo Bonzini 370bb02b65cSKevin Wolf if (job_id == NULL && !(flags & JOB_INTERNAL)) { 37188691b37SPaolo Bonzini job_id = bdrv_get_device_name(bs); 37288691b37SPaolo Bonzini } 37388691b37SPaolo Bonzini 37488691b37SPaolo Bonzini blk = blk_new(perm, shared_perm); 37588691b37SPaolo Bonzini ret = blk_insert_bs(blk, bs, errp); 37688691b37SPaolo Bonzini if (ret < 0) { 37788691b37SPaolo Bonzini blk_unref(blk); 37888691b37SPaolo Bonzini return NULL; 37988691b37SPaolo Bonzini } 38088691b37SPaolo Bonzini 3817eaa8fb5SKevin Wolf job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), 3824ad35181SKevin Wolf flags, cb, opaque, errp); 38333e9e9bdSKevin Wolf if (job == NULL) { 38433e9e9bdSKevin Wolf blk_unref(blk); 38533e9e9bdSKevin Wolf return NULL; 38633e9e9bdSKevin Wolf } 38733e9e9bdSKevin Wolf 388e7c1d78bSKevin Wolf assert(is_block_job(&job->job)); 38980fa2c75SKevin Wolf assert(job->job.driver->free == &block_job_free); 390b15de828SKevin Wolf assert(job->job.driver->user_resume == &block_job_user_resume); 391b69f777dSKevin Wolf assert(job->job.driver->drain == &block_job_drain); 392e7c1d78bSKevin Wolf 39388691b37SPaolo Bonzini job->blk = blk; 39488691b37SPaolo Bonzini 395139a9f02SKevin Wolf job->finalize_cancelled_notifier.notify = block_job_event_cancelled; 396139a9f02SKevin Wolf job->finalize_completed_notifier.notify = block_job_event_completed; 397139a9f02SKevin Wolf job->pending_notifier.notify = block_job_event_pending; 3982e1795b5SKevin Wolf job->ready_notifier.notify = block_job_event_ready; 399139a9f02SKevin Wolf 400139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_cancelled, 401139a9f02SKevin Wolf &job->finalize_cancelled_notifier); 402139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_completed, 403139a9f02SKevin Wolf &job->finalize_completed_notifier); 404139a9f02SKevin Wolf notifier_list_add(&job->job.on_pending, &job->pending_notifier); 4052e1795b5SKevin Wolf notifier_list_add(&job->job.on_ready, &job->ready_notifier); 406139a9f02SKevin Wolf 40788691b37SPaolo Bonzini error_setg(&job->blocker, "block device is in use by block job: %s", 408252291eaSKevin Wolf job_type_str(&job->job)); 40988691b37SPaolo Bonzini block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); 41088691b37SPaolo Bonzini bs->job = job; 41188691b37SPaolo Bonzini 41288691b37SPaolo Bonzini bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 41388691b37SPaolo Bonzini 41488691b37SPaolo Bonzini blk_add_aio_context_notifier(blk, block_job_attached_aio_context, 41588691b37SPaolo Bonzini block_job_detach_aio_context, job); 41688691b37SPaolo Bonzini 41788691b37SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 41888691b37SPaolo Bonzini if (speed != 0) { 41988691b37SPaolo Bonzini Error *local_err = NULL; 42088691b37SPaolo Bonzini 42188691b37SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 42288691b37SPaolo Bonzini if (local_err) { 4234ad35181SKevin Wolf job_early_fail(&job->job); 42488691b37SPaolo Bonzini error_propagate(errp, local_err); 42588691b37SPaolo Bonzini return NULL; 42688691b37SPaolo Bonzini } 42788691b37SPaolo Bonzini } 42875859b94SJohn Snow 42988691b37SPaolo Bonzini return job; 43088691b37SPaolo Bonzini } 43188691b37SPaolo Bonzini 4322caf63a9SPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 4332caf63a9SPaolo Bonzini { 4344c241cf5SPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 4354c241cf5SPaolo Bonzini return; 4364c241cf5SPaolo Bonzini } 437b15de828SKevin Wolf assert(job->job.user_paused && job->job.pause_count > 0); 4382caf63a9SPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 4392caf63a9SPaolo Bonzini } 4402caf63a9SPaolo Bonzini 441b15de828SKevin Wolf void block_job_user_resume(Job *job) 442b15de828SKevin Wolf { 443b15de828SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 444b15de828SKevin Wolf block_job_iostatus_reset(bjob); 445b15de828SKevin Wolf } 446b15de828SKevin Wolf 44781e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 44832c81a4aSPaolo Bonzini int is_read, int error) 44932c81a4aSPaolo Bonzini { 45032c81a4aSPaolo Bonzini BlockErrorAction action; 45132c81a4aSPaolo Bonzini 45232c81a4aSPaolo Bonzini switch (on_err) { 45332c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 4548c398252SKevin Wolf case BLOCKDEV_ON_ERROR_AUTO: 455a589569fSWenchao Xia action = (error == ENOSPC) ? 456a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 45732c81a4aSPaolo Bonzini break; 45832c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 459a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 46032c81a4aSPaolo Bonzini break; 46132c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 462a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 46332c81a4aSPaolo Bonzini break; 46432c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 465a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 46632c81a4aSPaolo Bonzini break; 46732c81a4aSPaolo Bonzini default: 46832c81a4aSPaolo Bonzini abort(); 46932c81a4aSPaolo Bonzini } 470559b935fSJohn Snow if (!block_job_is_internal(job)) { 47133e9e9bdSKevin Wolf qapi_event_send_block_job_error(job->job.id, 4725a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 4735a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 4745a2d2cbdSWenchao Xia action, &error_abort); 475559b935fSJohn Snow } 476a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 477b15de828SKevin Wolf job_pause(&job->job); 478751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 479b15de828SKevin Wolf job->job.user_paused = true; 48032c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 48132c81a4aSPaolo Bonzini } 48232c81a4aSPaolo Bonzini return action; 48332c81a4aSPaolo Bonzini } 484