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; 1069f6bb4c0SKevin Wolf const JobDriver *drv = job->job.driver; 1079f6bb4c0SKevin Wolf BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver); 108463e0be1SStefan Hajnoczi 10908be6fe2SKevin Wolf job->job.aio_context = new_context; 1109f6bb4c0SKevin Wolf if (bjdrv->attached_aio_context) { 1119f6bb4c0SKevin 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); 1209f6bb4c0SKevin Wolf const JobDriver *drv = job->driver; 1219f6bb4c0SKevin Wolf BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver); 122bae8196dSPaolo Bonzini 123b69f777dSKevin Wolf blk_drain(bjob->blk); 1249f6bb4c0SKevin Wolf if (bjdrv->drain) { 1259f6bb4c0SKevin 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 15889bd0305SKevin Wolf static bool child_job_drained_poll(BdrvChild *c) 15989bd0305SKevin Wolf { 16089bd0305SKevin Wolf BlockJob *bjob = c->opaque; 16189bd0305SKevin Wolf Job *job = &bjob->job; 16289bd0305SKevin Wolf const BlockJobDriver *drv = block_job_driver(bjob); 16389bd0305SKevin Wolf 16489bd0305SKevin Wolf /* An inactive or completed job doesn't have any pending requests. Jobs 16589bd0305SKevin Wolf * with !job->busy are either already paused or have a pause point after 16689bd0305SKevin Wolf * being reentered, so no job driver code will run before they pause. */ 167b5a7a057SKevin Wolf if (!job->busy || job_is_completed(job)) { 16889bd0305SKevin Wolf return false; 16989bd0305SKevin Wolf } 17089bd0305SKevin Wolf 17189bd0305SKevin Wolf /* Otherwise, assume that it isn't fully stopped yet, but allow the job to 17289bd0305SKevin Wolf * override this assumption. */ 17389bd0305SKevin Wolf if (drv->drained_poll) { 17489bd0305SKevin Wolf return drv->drained_poll(bjob); 17589bd0305SKevin Wolf } else { 17689bd0305SKevin Wolf return true; 17789bd0305SKevin Wolf } 17889bd0305SKevin Wolf } 17989bd0305SKevin Wolf 180ad90febaSKevin Wolf static void child_job_drained_end(BdrvChild *c) 181f321dcb5SPaolo Bonzini { 182ad90febaSKevin Wolf BlockJob *job = c->opaque; 183b15de828SKevin Wolf job_resume(&job->job); 184f321dcb5SPaolo Bonzini } 185f321dcb5SPaolo Bonzini 186ad90febaSKevin Wolf static const BdrvChildRole child_job = { 187ad90febaSKevin Wolf .get_parent_desc = child_job_get_parent_desc, 188ad90febaSKevin Wolf .drained_begin = child_job_drained_begin, 18989bd0305SKevin Wolf .drained_poll = child_job_drained_poll, 190ad90febaSKevin Wolf .drained_end = child_job_drained_end, 191ad90febaSKevin Wolf .stay_at_node = true, 192f321dcb5SPaolo Bonzini }; 193f321dcb5SPaolo Bonzini 194bbc02b90SKevin Wolf void block_job_remove_all_bdrv(BlockJob *job) 195bbc02b90SKevin Wolf { 196bbc02b90SKevin Wolf GSList *l; 197bbc02b90SKevin Wolf for (l = job->nodes; l; l = l->next) { 198bbc02b90SKevin Wolf BdrvChild *c = l->data; 199bbc02b90SKevin Wolf bdrv_op_unblock_all(c->bs, job->blocker); 200bbc02b90SKevin Wolf bdrv_root_unref_child(c); 201bbc02b90SKevin Wolf } 202bbc02b90SKevin Wolf g_slist_free(job->nodes); 203bbc02b90SKevin Wolf job->nodes = NULL; 204bbc02b90SKevin Wolf } 205bbc02b90SKevin Wolf 20676d554e2SKevin Wolf int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, 20776d554e2SKevin Wolf uint64_t perm, uint64_t shared_perm, Error **errp) 20823d402d4SAlberto Garcia { 20976d554e2SKevin Wolf BdrvChild *c; 21076d554e2SKevin Wolf 21176d554e2SKevin Wolf c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, 21276d554e2SKevin Wolf job, errp); 21376d554e2SKevin Wolf if (c == NULL) { 21476d554e2SKevin Wolf return -EPERM; 21576d554e2SKevin Wolf } 21676d554e2SKevin Wolf 21776d554e2SKevin Wolf job->nodes = g_slist_prepend(job->nodes, c); 21823d402d4SAlberto Garcia bdrv_ref(bs); 21923d402d4SAlberto Garcia bdrv_op_block_all(bs, job->blocker); 22076d554e2SKevin Wolf 22176d554e2SKevin Wolf return 0; 22223d402d4SAlberto Garcia } 22323d402d4SAlberto Garcia 22434dc97b9SKevin Wolf static void block_job_on_idle(Notifier *n, void *opaque) 22534dc97b9SKevin Wolf { 226*cfe29d82SKevin Wolf aio_wait_kick(); 22734dc97b9SKevin Wolf } 22834dc97b9SKevin Wolf 229559b935fSJohn Snow bool block_job_is_internal(BlockJob *job) 230559b935fSJohn Snow { 23133e9e9bdSKevin Wolf return (job->job.id == NULL); 232559b935fSJohn Snow } 233559b935fSJohn Snow 234bd21935bSKevin Wolf const BlockJobDriver *block_job_driver(BlockJob *job) 235bd21935bSKevin Wolf { 2369f6bb4c0SKevin Wolf return container_of(job->job.driver, BlockJobDriver, job_driver); 237bd21935bSKevin Wolf } 238bd21935bSKevin Wolf 239da01ff7fSKevin Wolf /* Assumes the job_mutex is held */ 240da01ff7fSKevin Wolf static bool job_timer_pending(Job *job) 241da01ff7fSKevin Wolf { 242da01ff7fSKevin Wolf return timer_pending(&job->sleep_timer); 243da01ff7fSKevin Wolf } 244da01ff7fSKevin Wolf 2452f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 2462f0c9fe6SPaolo Bonzini { 247aa9ef2e6SJohn Snow int64_t old_speed = job->speed; 2482f0c9fe6SPaolo Bonzini 249a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { 2500ec4dfb8SJohn Snow return; 2510ec4dfb8SJohn Snow } 25218bb6928SKevin Wolf if (speed < 0) { 25318bb6928SKevin Wolf error_setg(errp, QERR_INVALID_PARAMETER, "speed"); 2542f0c9fe6SPaolo Bonzini return; 2552f0c9fe6SPaolo Bonzini } 2562f0c9fe6SPaolo Bonzini 25718bb6928SKevin Wolf ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); 25818bb6928SKevin Wolf 2592f0c9fe6SPaolo Bonzini job->speed = speed; 260d4fce188SJohn Snow if (speed && speed <= old_speed) { 261aa9ef2e6SJohn Snow return; 262aa9ef2e6SJohn Snow } 263aa9ef2e6SJohn Snow 264aa9ef2e6SJohn Snow /* kick only if a timer is pending */ 265da01ff7fSKevin Wolf job_enter_cond(&job->job, job_timer_pending); 2662f0c9fe6SPaolo Bonzini } 2672f0c9fe6SPaolo Bonzini 268dee81d51SKevin Wolf int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) 269dee81d51SKevin Wolf { 270dee81d51SKevin Wolf if (!job->speed) { 271dee81d51SKevin Wolf return 0; 272dee81d51SKevin Wolf } 273dee81d51SKevin Wolf 274dee81d51SKevin Wolf return ratelimit_calculate_delay(&job->limit, n); 275dee81d51SKevin Wolf } 276dee81d51SKevin Wolf 277559b935fSJohn Snow BlockJobInfo *block_job_query(BlockJob *job, Error **errp) 27830e628b7SPaolo Bonzini { 279559b935fSJohn Snow BlockJobInfo *info; 280559b935fSJohn Snow 281559b935fSJohn Snow if (block_job_is_internal(job)) { 282559b935fSJohn Snow error_setg(errp, "Cannot query QEMU internal jobs"); 283559b935fSJohn Snow return NULL; 284559b935fSJohn Snow } 285559b935fSJohn Snow info = g_new0(BlockJobInfo, 1); 286252291eaSKevin Wolf info->type = g_strdup(job_type_str(&job->job)); 28733e9e9bdSKevin Wolf info->device = g_strdup(job->job.id); 288da01ff7fSKevin Wolf info->busy = atomic_read(&job->job.busy); 289da01ff7fSKevin Wolf info->paused = job->job.pause_count > 0; 29030a5c887SKevin Wolf info->offset = job->job.progress_current; 29130a5c887SKevin Wolf info->len = job->job.progress_total; 29230e628b7SPaolo Bonzini info->speed = job->speed; 29332c81a4aSPaolo Bonzini info->io_status = job->iostatus; 294df956ae2SKevin Wolf info->ready = job_is_ready(&job->job), 295a50c2ab8SKevin Wolf info->status = job->job.status; 296bb02b65cSKevin Wolf info->auto_finalize = job->job.auto_finalize; 297bb02b65cSKevin Wolf info->auto_dismiss = job->job.auto_dismiss; 2984ad35181SKevin Wolf info->has_error = job->job.ret != 0; 2994ad35181SKevin Wolf info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; 30030e628b7SPaolo Bonzini return info; 30130e628b7SPaolo Bonzini } 30232c81a4aSPaolo Bonzini 30332c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 30432c81a4aSPaolo Bonzini { 30532c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 30632c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 30732c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 30832c81a4aSPaolo Bonzini } 30932c81a4aSPaolo Bonzini } 31032c81a4aSPaolo Bonzini 311139a9f02SKevin Wolf static void block_job_event_cancelled(Notifier *n, void *opaque) 312a66a2a36SPaolo Bonzini { 313139a9f02SKevin Wolf BlockJob *job = opaque; 314139a9f02SKevin Wolf 315559b935fSJohn Snow if (block_job_is_internal(job)) { 316559b935fSJohn Snow return; 317559b935fSJohn Snow } 318559b935fSJohn Snow 319252291eaSKevin Wolf qapi_event_send_block_job_cancelled(job_type(&job->job), 32033e9e9bdSKevin Wolf job->job.id, 32130a5c887SKevin Wolf job->job.progress_total, 32230a5c887SKevin Wolf job->job.progress_current, 3233ab72385SPeter Xu job->speed); 324a66a2a36SPaolo Bonzini } 325a66a2a36SPaolo Bonzini 326139a9f02SKevin Wolf static void block_job_event_completed(Notifier *n, void *opaque) 327a66a2a36SPaolo Bonzini { 328139a9f02SKevin Wolf BlockJob *job = opaque; 329139a9f02SKevin Wolf const char *msg = NULL; 330139a9f02SKevin Wolf 331559b935fSJohn Snow if (block_job_is_internal(job)) { 332559b935fSJohn Snow return; 333559b935fSJohn Snow } 334559b935fSJohn Snow 3354ad35181SKevin Wolf if (job->job.ret < 0) { 3364ad35181SKevin Wolf msg = strerror(-job->job.ret); 337139a9f02SKevin Wolf } 338139a9f02SKevin Wolf 339252291eaSKevin Wolf qapi_event_send_block_job_completed(job_type(&job->job), 34033e9e9bdSKevin Wolf job->job.id, 34130a5c887SKevin Wolf job->job.progress_total, 34230a5c887SKevin Wolf job->job.progress_current, 343bcada37bSWenchao Xia job->speed, 344bcada37bSWenchao Xia !!msg, 3453ab72385SPeter Xu msg); 346bcada37bSWenchao Xia } 347bcada37bSWenchao Xia 348139a9f02SKevin Wolf static void block_job_event_pending(Notifier *n, void *opaque) 3495f241594SJohn Snow { 350139a9f02SKevin Wolf BlockJob *job = opaque; 351139a9f02SKevin Wolf 3525d4f3769SKevin Wolf if (block_job_is_internal(job)) { 3535d4f3769SKevin Wolf return; 3545d4f3769SKevin Wolf } 3555d4f3769SKevin Wolf 356252291eaSKevin Wolf qapi_event_send_block_job_pending(job_type(&job->job), 3573ab72385SPeter Xu job->job.id); 3585f241594SJohn Snow } 3595f241594SJohn Snow 3602e1795b5SKevin Wolf static void block_job_event_ready(Notifier *n, void *opaque) 3612e1795b5SKevin Wolf { 3622e1795b5SKevin Wolf BlockJob *job = opaque; 3632e1795b5SKevin Wolf 3642e1795b5SKevin Wolf if (block_job_is_internal(job)) { 3652e1795b5SKevin Wolf return; 3662e1795b5SKevin Wolf } 3672e1795b5SKevin Wolf 3682e1795b5SKevin Wolf qapi_event_send_block_job_ready(job_type(&job->job), 3692e1795b5SKevin Wolf job->job.id, 37030a5c887SKevin Wolf job->job.progress_total, 37130a5c887SKevin Wolf job->job.progress_current, 3723ab72385SPeter Xu job->speed); 3732e1795b5SKevin Wolf } 3742e1795b5SKevin Wolf 3752e1795b5SKevin Wolf 37688691b37SPaolo Bonzini /* 37788691b37SPaolo Bonzini * API for block job drivers and the block layer. These functions are 37888691b37SPaolo Bonzini * declared in blockjob_int.h. 37988691b37SPaolo Bonzini */ 38088691b37SPaolo Bonzini 38188691b37SPaolo Bonzini void *block_job_create(const char *job_id, const BlockJobDriver *driver, 38262c9e416SKevin Wolf JobTxn *txn, BlockDriverState *bs, uint64_t perm, 38388691b37SPaolo Bonzini uint64_t shared_perm, int64_t speed, int flags, 38488691b37SPaolo Bonzini BlockCompletionFunc *cb, void *opaque, Error **errp) 38588691b37SPaolo Bonzini { 38688691b37SPaolo Bonzini BlockBackend *blk; 38788691b37SPaolo Bonzini BlockJob *job; 38888691b37SPaolo Bonzini int ret; 38988691b37SPaolo Bonzini 39088691b37SPaolo Bonzini if (bs->job) { 39188691b37SPaolo Bonzini error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 39288691b37SPaolo Bonzini return NULL; 39388691b37SPaolo Bonzini } 39488691b37SPaolo Bonzini 395bb02b65cSKevin Wolf if (job_id == NULL && !(flags & JOB_INTERNAL)) { 39688691b37SPaolo Bonzini job_id = bdrv_get_device_name(bs); 39788691b37SPaolo Bonzini } 39888691b37SPaolo Bonzini 39988691b37SPaolo Bonzini blk = blk_new(perm, shared_perm); 40088691b37SPaolo Bonzini ret = blk_insert_bs(blk, bs, errp); 40188691b37SPaolo Bonzini if (ret < 0) { 40288691b37SPaolo Bonzini blk_unref(blk); 40388691b37SPaolo Bonzini return NULL; 40488691b37SPaolo Bonzini } 40588691b37SPaolo Bonzini 4067eaa8fb5SKevin Wolf job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), 4074ad35181SKevin Wolf flags, cb, opaque, errp); 40833e9e9bdSKevin Wolf if (job == NULL) { 40933e9e9bdSKevin Wolf blk_unref(blk); 41033e9e9bdSKevin Wolf return NULL; 41133e9e9bdSKevin Wolf } 41233e9e9bdSKevin Wolf 413e7c1d78bSKevin Wolf assert(is_block_job(&job->job)); 41480fa2c75SKevin Wolf assert(job->job.driver->free == &block_job_free); 415b15de828SKevin Wolf assert(job->job.driver->user_resume == &block_job_user_resume); 416b69f777dSKevin Wolf assert(job->job.driver->drain == &block_job_drain); 417e7c1d78bSKevin Wolf 41888691b37SPaolo Bonzini job->blk = blk; 41988691b37SPaolo Bonzini 420139a9f02SKevin Wolf job->finalize_cancelled_notifier.notify = block_job_event_cancelled; 421139a9f02SKevin Wolf job->finalize_completed_notifier.notify = block_job_event_completed; 422139a9f02SKevin Wolf job->pending_notifier.notify = block_job_event_pending; 4232e1795b5SKevin Wolf job->ready_notifier.notify = block_job_event_ready; 42434dc97b9SKevin Wolf job->idle_notifier.notify = block_job_on_idle; 425139a9f02SKevin Wolf 426139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_cancelled, 427139a9f02SKevin Wolf &job->finalize_cancelled_notifier); 428139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_completed, 429139a9f02SKevin Wolf &job->finalize_completed_notifier); 430139a9f02SKevin Wolf notifier_list_add(&job->job.on_pending, &job->pending_notifier); 4312e1795b5SKevin Wolf notifier_list_add(&job->job.on_ready, &job->ready_notifier); 43234dc97b9SKevin Wolf notifier_list_add(&job->job.on_idle, &job->idle_notifier); 433139a9f02SKevin Wolf 43488691b37SPaolo Bonzini error_setg(&job->blocker, "block device is in use by block job: %s", 435252291eaSKevin Wolf job_type_str(&job->job)); 43688691b37SPaolo Bonzini block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); 43788691b37SPaolo Bonzini bs->job = job; 43888691b37SPaolo Bonzini 43988691b37SPaolo Bonzini bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 44088691b37SPaolo Bonzini 44188691b37SPaolo Bonzini blk_add_aio_context_notifier(blk, block_job_attached_aio_context, 44288691b37SPaolo Bonzini block_job_detach_aio_context, job); 44388691b37SPaolo Bonzini 44488691b37SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 44588691b37SPaolo Bonzini if (speed != 0) { 44688691b37SPaolo Bonzini Error *local_err = NULL; 44788691b37SPaolo Bonzini 44888691b37SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 44988691b37SPaolo Bonzini if (local_err) { 4504ad35181SKevin Wolf job_early_fail(&job->job); 45188691b37SPaolo Bonzini error_propagate(errp, local_err); 45288691b37SPaolo Bonzini return NULL; 45388691b37SPaolo Bonzini } 45488691b37SPaolo Bonzini } 45575859b94SJohn Snow 45688691b37SPaolo Bonzini return job; 45788691b37SPaolo Bonzini } 45888691b37SPaolo Bonzini 4592caf63a9SPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 4602caf63a9SPaolo Bonzini { 4614c241cf5SPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 4624c241cf5SPaolo Bonzini return; 4634c241cf5SPaolo Bonzini } 464b15de828SKevin Wolf assert(job->job.user_paused && job->job.pause_count > 0); 4652caf63a9SPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 4662caf63a9SPaolo Bonzini } 4672caf63a9SPaolo Bonzini 468b15de828SKevin Wolf void block_job_user_resume(Job *job) 469b15de828SKevin Wolf { 470b15de828SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 471b15de828SKevin Wolf block_job_iostatus_reset(bjob); 472b15de828SKevin Wolf } 473b15de828SKevin Wolf 47481e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 47532c81a4aSPaolo Bonzini int is_read, int error) 47632c81a4aSPaolo Bonzini { 47732c81a4aSPaolo Bonzini BlockErrorAction action; 47832c81a4aSPaolo Bonzini 47932c81a4aSPaolo Bonzini switch (on_err) { 48032c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 4818c398252SKevin Wolf case BLOCKDEV_ON_ERROR_AUTO: 482a589569fSWenchao Xia action = (error == ENOSPC) ? 483a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 48432c81a4aSPaolo Bonzini break; 48532c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 486a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 48732c81a4aSPaolo Bonzini break; 48832c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 489a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 49032c81a4aSPaolo Bonzini break; 49132c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 492a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 49332c81a4aSPaolo Bonzini break; 49432c81a4aSPaolo Bonzini default: 49532c81a4aSPaolo Bonzini abort(); 49632c81a4aSPaolo Bonzini } 497559b935fSJohn Snow if (!block_job_is_internal(job)) { 49833e9e9bdSKevin Wolf qapi_event_send_block_job_error(job->job.id, 4995a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 5005a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 5013ab72385SPeter Xu action); 502559b935fSJohn Snow } 503a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 504b15de828SKevin Wolf job_pause(&job->job); 505751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 506b15de828SKevin Wolf job->job.user_paused = true; 50732c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 50832c81a4aSPaolo Bonzini } 50932c81a4aSPaolo Bonzini return action; 51032c81a4aSPaolo Bonzini } 511