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 8480fa2c75SKevin Wolf void block_job_free(Job *job) 8505b0d8e3SPaolo Bonzini { 8680fa2c75SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 8780fa2c75SKevin Wolf BlockDriverState *bs = blk_bs(bjob->blk); 8880fa2c75SKevin Wolf 8905b0d8e3SPaolo Bonzini bs->job = NULL; 9080fa2c75SKevin Wolf block_job_remove_all_bdrv(bjob); 9180fa2c75SKevin Wolf blk_unref(bjob->blk); 9280fa2c75SKevin Wolf error_free(bjob->blocker); 9305b0d8e3SPaolo Bonzini } 9405b0d8e3SPaolo Bonzini 95b69f777dSKevin Wolf void block_job_drain(Job *job) 96bae8196dSPaolo Bonzini { 97b69f777dSKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 989f6bb4c0SKevin Wolf const JobDriver *drv = job->driver; 999f6bb4c0SKevin Wolf BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver); 100bae8196dSPaolo Bonzini 101b69f777dSKevin Wolf blk_drain(bjob->blk); 1029f6bb4c0SKevin Wolf if (bjdrv->drain) { 1039f6bb4c0SKevin Wolf bjdrv->drain(bjob); 104bae8196dSPaolo Bonzini } 105bae8196dSPaolo Bonzini } 106bae8196dSPaolo Bonzini 107f321dcb5SPaolo Bonzini static char *child_job_get_parent_desc(BdrvChild *c) 108f321dcb5SPaolo Bonzini { 109f321dcb5SPaolo Bonzini BlockJob *job = c->opaque; 110252291eaSKevin Wolf return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); 111f321dcb5SPaolo Bonzini } 112f321dcb5SPaolo Bonzini 113ad90febaSKevin Wolf static void child_job_drained_begin(BdrvChild *c) 114f321dcb5SPaolo Bonzini { 115ad90febaSKevin Wolf BlockJob *job = c->opaque; 116b15de828SKevin Wolf job_pause(&job->job); 117f321dcb5SPaolo Bonzini } 118f321dcb5SPaolo Bonzini 11989bd0305SKevin Wolf static bool child_job_drained_poll(BdrvChild *c) 12089bd0305SKevin Wolf { 12189bd0305SKevin Wolf BlockJob *bjob = c->opaque; 12289bd0305SKevin Wolf Job *job = &bjob->job; 12389bd0305SKevin Wolf const BlockJobDriver *drv = block_job_driver(bjob); 12489bd0305SKevin Wolf 12589bd0305SKevin Wolf /* An inactive or completed job doesn't have any pending requests. Jobs 12689bd0305SKevin Wolf * with !job->busy are either already paused or have a pause point after 12789bd0305SKevin Wolf * being reentered, so no job driver code will run before they pause. */ 128b5a7a057SKevin Wolf if (!job->busy || job_is_completed(job)) { 12989bd0305SKevin Wolf return false; 13089bd0305SKevin Wolf } 13189bd0305SKevin Wolf 13289bd0305SKevin Wolf /* Otherwise, assume that it isn't fully stopped yet, but allow the job to 13389bd0305SKevin Wolf * override this assumption. */ 13489bd0305SKevin Wolf if (drv->drained_poll) { 13589bd0305SKevin Wolf return drv->drained_poll(bjob); 13689bd0305SKevin Wolf } else { 13789bd0305SKevin Wolf return true; 13889bd0305SKevin Wolf } 13989bd0305SKevin Wolf } 14089bd0305SKevin Wolf 141ad90febaSKevin Wolf static void child_job_drained_end(BdrvChild *c) 142f321dcb5SPaolo Bonzini { 143ad90febaSKevin Wolf BlockJob *job = c->opaque; 144b15de828SKevin Wolf job_resume(&job->job); 145f321dcb5SPaolo Bonzini } 146f321dcb5SPaolo Bonzini 1479ff7f0dfSKevin Wolf static bool child_job_can_set_aio_ctx(BdrvChild *c, AioContext *ctx, 1489ff7f0dfSKevin Wolf GSList **ignore, Error **errp) 1499ff7f0dfSKevin Wolf { 1509ff7f0dfSKevin Wolf BlockJob *job = c->opaque; 1519ff7f0dfSKevin Wolf GSList *l; 1529ff7f0dfSKevin Wolf 1539ff7f0dfSKevin Wolf for (l = job->nodes; l; l = l->next) { 1549ff7f0dfSKevin Wolf BdrvChild *sibling = l->data; 1559ff7f0dfSKevin Wolf if (!bdrv_child_can_set_aio_context(sibling, ctx, ignore, errp)) { 1569ff7f0dfSKevin Wolf return false; 1579ff7f0dfSKevin Wolf } 1589ff7f0dfSKevin Wolf } 1599ff7f0dfSKevin Wolf return true; 1609ff7f0dfSKevin Wolf } 1619ff7f0dfSKevin Wolf 1629ff7f0dfSKevin Wolf static void child_job_set_aio_ctx(BdrvChild *c, AioContext *ctx, 1639ff7f0dfSKevin Wolf GSList **ignore) 1649ff7f0dfSKevin Wolf { 1659ff7f0dfSKevin Wolf BlockJob *job = c->opaque; 1669ff7f0dfSKevin Wolf GSList *l; 1679ff7f0dfSKevin Wolf 1689ff7f0dfSKevin Wolf for (l = job->nodes; l; l = l->next) { 1699ff7f0dfSKevin Wolf BdrvChild *sibling = l->data; 1709ff7f0dfSKevin Wolf if (g_slist_find(*ignore, sibling)) { 1719ff7f0dfSKevin Wolf continue; 1729ff7f0dfSKevin Wolf } 1739ff7f0dfSKevin Wolf *ignore = g_slist_prepend(*ignore, sibling); 1749ff7f0dfSKevin Wolf bdrv_set_aio_context_ignore(sibling->bs, ctx, ignore); 1759ff7f0dfSKevin Wolf } 176657e1203SKevin Wolf 177657e1203SKevin Wolf job->job.aio_context = ctx; 1789ff7f0dfSKevin Wolf } 1799ff7f0dfSKevin Wolf 180ad90febaSKevin Wolf static const BdrvChildRole child_job = { 181ad90febaSKevin Wolf .get_parent_desc = child_job_get_parent_desc, 182ad90febaSKevin Wolf .drained_begin = child_job_drained_begin, 18389bd0305SKevin Wolf .drained_poll = child_job_drained_poll, 184ad90febaSKevin Wolf .drained_end = child_job_drained_end, 1859ff7f0dfSKevin Wolf .can_set_aio_ctx = child_job_can_set_aio_ctx, 1869ff7f0dfSKevin Wolf .set_aio_ctx = child_job_set_aio_ctx, 187ad90febaSKevin Wolf .stay_at_node = true, 188f321dcb5SPaolo Bonzini }; 189f321dcb5SPaolo Bonzini 190bbc02b90SKevin Wolf void block_job_remove_all_bdrv(BlockJob *job) 191bbc02b90SKevin Wolf { 192bbc02b90SKevin Wolf GSList *l; 193bbc02b90SKevin Wolf for (l = job->nodes; l; l = l->next) { 194bbc02b90SKevin Wolf BdrvChild *c = l->data; 195bbc02b90SKevin Wolf bdrv_op_unblock_all(c->bs, job->blocker); 196bbc02b90SKevin Wolf bdrv_root_unref_child(c); 197bbc02b90SKevin Wolf } 198bbc02b90SKevin Wolf g_slist_free(job->nodes); 199bbc02b90SKevin Wolf job->nodes = NULL; 200bbc02b90SKevin Wolf } 201bbc02b90SKevin Wolf 20276d554e2SKevin Wolf int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, 20376d554e2SKevin Wolf uint64_t perm, uint64_t shared_perm, Error **errp) 20423d402d4SAlberto Garcia { 20576d554e2SKevin Wolf BdrvChild *c; 20676d554e2SKevin Wolf 207*b441dc71SAlberto Garcia bdrv_ref(bs); 20876d554e2SKevin Wolf c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm, 20976d554e2SKevin Wolf job, errp); 21076d554e2SKevin Wolf if (c == NULL) { 21176d554e2SKevin Wolf return -EPERM; 21276d554e2SKevin Wolf } 21376d554e2SKevin Wolf 21476d554e2SKevin Wolf job->nodes = g_slist_prepend(job->nodes, c); 21523d402d4SAlberto Garcia bdrv_op_block_all(bs, job->blocker); 21676d554e2SKevin Wolf 21776d554e2SKevin Wolf return 0; 21823d402d4SAlberto Garcia } 21923d402d4SAlberto Garcia 22034dc97b9SKevin Wolf static void block_job_on_idle(Notifier *n, void *opaque) 22134dc97b9SKevin Wolf { 222cfe29d82SKevin Wolf aio_wait_kick(); 22334dc97b9SKevin Wolf } 22434dc97b9SKevin Wolf 225559b935fSJohn Snow bool block_job_is_internal(BlockJob *job) 226559b935fSJohn Snow { 22733e9e9bdSKevin Wolf return (job->job.id == NULL); 228559b935fSJohn Snow } 229559b935fSJohn Snow 230bd21935bSKevin Wolf const BlockJobDriver *block_job_driver(BlockJob *job) 231bd21935bSKevin Wolf { 2329f6bb4c0SKevin Wolf return container_of(job->job.driver, BlockJobDriver, job_driver); 233bd21935bSKevin Wolf } 234bd21935bSKevin Wolf 235da01ff7fSKevin Wolf /* Assumes the job_mutex is held */ 236da01ff7fSKevin Wolf static bool job_timer_pending(Job *job) 237da01ff7fSKevin Wolf { 238da01ff7fSKevin Wolf return timer_pending(&job->sleep_timer); 239da01ff7fSKevin Wolf } 240da01ff7fSKevin Wolf 2412f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 2422f0c9fe6SPaolo Bonzini { 243aa9ef2e6SJohn Snow int64_t old_speed = job->speed; 2442f0c9fe6SPaolo Bonzini 245a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { 2460ec4dfb8SJohn Snow return; 2470ec4dfb8SJohn Snow } 24818bb6928SKevin Wolf if (speed < 0) { 24918bb6928SKevin Wolf error_setg(errp, QERR_INVALID_PARAMETER, "speed"); 2502f0c9fe6SPaolo Bonzini return; 2512f0c9fe6SPaolo Bonzini } 2522f0c9fe6SPaolo Bonzini 25318bb6928SKevin Wolf ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); 25418bb6928SKevin Wolf 2552f0c9fe6SPaolo Bonzini job->speed = speed; 256d4fce188SJohn Snow if (speed && speed <= old_speed) { 257aa9ef2e6SJohn Snow return; 258aa9ef2e6SJohn Snow } 259aa9ef2e6SJohn Snow 260aa9ef2e6SJohn Snow /* kick only if a timer is pending */ 261da01ff7fSKevin Wolf job_enter_cond(&job->job, job_timer_pending); 2622f0c9fe6SPaolo Bonzini } 2632f0c9fe6SPaolo Bonzini 264dee81d51SKevin Wolf int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) 265dee81d51SKevin Wolf { 266dee81d51SKevin Wolf if (!job->speed) { 267dee81d51SKevin Wolf return 0; 268dee81d51SKevin Wolf } 269dee81d51SKevin Wolf 270dee81d51SKevin Wolf return ratelimit_calculate_delay(&job->limit, n); 271dee81d51SKevin Wolf } 272dee81d51SKevin Wolf 273559b935fSJohn Snow BlockJobInfo *block_job_query(BlockJob *job, Error **errp) 27430e628b7SPaolo Bonzini { 275559b935fSJohn Snow BlockJobInfo *info; 276559b935fSJohn Snow 277559b935fSJohn Snow if (block_job_is_internal(job)) { 278559b935fSJohn Snow error_setg(errp, "Cannot query QEMU internal jobs"); 279559b935fSJohn Snow return NULL; 280559b935fSJohn Snow } 281559b935fSJohn Snow info = g_new0(BlockJobInfo, 1); 282252291eaSKevin Wolf info->type = g_strdup(job_type_str(&job->job)); 28333e9e9bdSKevin Wolf info->device = g_strdup(job->job.id); 284da01ff7fSKevin Wolf info->busy = atomic_read(&job->job.busy); 285da01ff7fSKevin Wolf info->paused = job->job.pause_count > 0; 28630a5c887SKevin Wolf info->offset = job->job.progress_current; 28730a5c887SKevin Wolf info->len = job->job.progress_total; 28830e628b7SPaolo Bonzini info->speed = job->speed; 28932c81a4aSPaolo Bonzini info->io_status = job->iostatus; 290df956ae2SKevin Wolf info->ready = job_is_ready(&job->job), 291a50c2ab8SKevin Wolf info->status = job->job.status; 292bb02b65cSKevin Wolf info->auto_finalize = job->job.auto_finalize; 293bb02b65cSKevin Wolf info->auto_dismiss = job->job.auto_dismiss; 2944ad35181SKevin Wolf info->has_error = job->job.ret != 0; 2954ad35181SKevin Wolf info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; 29630e628b7SPaolo Bonzini return info; 29730e628b7SPaolo Bonzini } 29832c81a4aSPaolo Bonzini 29932c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 30032c81a4aSPaolo Bonzini { 30132c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 30232c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 30332c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 30432c81a4aSPaolo Bonzini } 30532c81a4aSPaolo Bonzini } 30632c81a4aSPaolo Bonzini 307139a9f02SKevin Wolf static void block_job_event_cancelled(Notifier *n, void *opaque) 308a66a2a36SPaolo Bonzini { 309139a9f02SKevin Wolf BlockJob *job = opaque; 310139a9f02SKevin Wolf 311559b935fSJohn Snow if (block_job_is_internal(job)) { 312559b935fSJohn Snow return; 313559b935fSJohn Snow } 314559b935fSJohn Snow 315252291eaSKevin Wolf qapi_event_send_block_job_cancelled(job_type(&job->job), 31633e9e9bdSKevin Wolf job->job.id, 31730a5c887SKevin Wolf job->job.progress_total, 31830a5c887SKevin Wolf job->job.progress_current, 3193ab72385SPeter Xu job->speed); 320a66a2a36SPaolo Bonzini } 321a66a2a36SPaolo Bonzini 322139a9f02SKevin Wolf static void block_job_event_completed(Notifier *n, void *opaque) 323a66a2a36SPaolo Bonzini { 324139a9f02SKevin Wolf BlockJob *job = opaque; 325139a9f02SKevin Wolf const char *msg = NULL; 326139a9f02SKevin Wolf 327559b935fSJohn Snow if (block_job_is_internal(job)) { 328559b935fSJohn Snow return; 329559b935fSJohn Snow } 330559b935fSJohn Snow 3314ad35181SKevin Wolf if (job->job.ret < 0) { 3324ad35181SKevin Wolf msg = strerror(-job->job.ret); 333139a9f02SKevin Wolf } 334139a9f02SKevin Wolf 335252291eaSKevin Wolf qapi_event_send_block_job_completed(job_type(&job->job), 33633e9e9bdSKevin Wolf job->job.id, 33730a5c887SKevin Wolf job->job.progress_total, 33830a5c887SKevin Wolf job->job.progress_current, 339bcada37bSWenchao Xia job->speed, 340bcada37bSWenchao Xia !!msg, 3413ab72385SPeter Xu msg); 342bcada37bSWenchao Xia } 343bcada37bSWenchao Xia 344139a9f02SKevin Wolf static void block_job_event_pending(Notifier *n, void *opaque) 3455f241594SJohn Snow { 346139a9f02SKevin Wolf BlockJob *job = opaque; 347139a9f02SKevin Wolf 3485d4f3769SKevin Wolf if (block_job_is_internal(job)) { 3495d4f3769SKevin Wolf return; 3505d4f3769SKevin Wolf } 3515d4f3769SKevin Wolf 352252291eaSKevin Wolf qapi_event_send_block_job_pending(job_type(&job->job), 3533ab72385SPeter Xu job->job.id); 3545f241594SJohn Snow } 3555f241594SJohn Snow 3562e1795b5SKevin Wolf static void block_job_event_ready(Notifier *n, void *opaque) 3572e1795b5SKevin Wolf { 3582e1795b5SKevin Wolf BlockJob *job = opaque; 3592e1795b5SKevin Wolf 3602e1795b5SKevin Wolf if (block_job_is_internal(job)) { 3612e1795b5SKevin Wolf return; 3622e1795b5SKevin Wolf } 3632e1795b5SKevin Wolf 3642e1795b5SKevin Wolf qapi_event_send_block_job_ready(job_type(&job->job), 3652e1795b5SKevin Wolf job->job.id, 36630a5c887SKevin Wolf job->job.progress_total, 36730a5c887SKevin Wolf job->job.progress_current, 3683ab72385SPeter Xu job->speed); 3692e1795b5SKevin Wolf } 3702e1795b5SKevin Wolf 3712e1795b5SKevin Wolf 37288691b37SPaolo Bonzini /* 37388691b37SPaolo Bonzini * API for block job drivers and the block layer. These functions are 37488691b37SPaolo Bonzini * declared in blockjob_int.h. 37588691b37SPaolo Bonzini */ 37688691b37SPaolo Bonzini 37788691b37SPaolo Bonzini void *block_job_create(const char *job_id, const BlockJobDriver *driver, 37862c9e416SKevin Wolf JobTxn *txn, BlockDriverState *bs, uint64_t perm, 37988691b37SPaolo Bonzini uint64_t shared_perm, int64_t speed, int flags, 38088691b37SPaolo Bonzini BlockCompletionFunc *cb, void *opaque, Error **errp) 38188691b37SPaolo Bonzini { 38288691b37SPaolo Bonzini BlockBackend *blk; 38388691b37SPaolo Bonzini BlockJob *job; 38488691b37SPaolo Bonzini int ret; 38588691b37SPaolo Bonzini 38688691b37SPaolo Bonzini if (bs->job) { 38788691b37SPaolo Bonzini error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 38888691b37SPaolo Bonzini return NULL; 38988691b37SPaolo Bonzini } 39088691b37SPaolo Bonzini 391bb02b65cSKevin Wolf if (job_id == NULL && !(flags & JOB_INTERNAL)) { 39288691b37SPaolo Bonzini job_id = bdrv_get_device_name(bs); 39388691b37SPaolo Bonzini } 39488691b37SPaolo Bonzini 39588691b37SPaolo Bonzini blk = blk_new(perm, shared_perm); 39688691b37SPaolo Bonzini ret = blk_insert_bs(blk, bs, errp); 39788691b37SPaolo Bonzini if (ret < 0) { 39888691b37SPaolo Bonzini blk_unref(blk); 39988691b37SPaolo Bonzini return NULL; 40088691b37SPaolo Bonzini } 40188691b37SPaolo Bonzini 4027eaa8fb5SKevin Wolf job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), 4034ad35181SKevin Wolf flags, cb, opaque, errp); 40433e9e9bdSKevin Wolf if (job == NULL) { 40533e9e9bdSKevin Wolf blk_unref(blk); 40633e9e9bdSKevin Wolf return NULL; 40733e9e9bdSKevin Wolf } 40833e9e9bdSKevin Wolf 409e7c1d78bSKevin Wolf assert(is_block_job(&job->job)); 41080fa2c75SKevin Wolf assert(job->job.driver->free == &block_job_free); 411b15de828SKevin Wolf assert(job->job.driver->user_resume == &block_job_user_resume); 412b69f777dSKevin Wolf assert(job->job.driver->drain == &block_job_drain); 413e7c1d78bSKevin Wolf 41488691b37SPaolo Bonzini job->blk = blk; 41588691b37SPaolo Bonzini 416139a9f02SKevin Wolf job->finalize_cancelled_notifier.notify = block_job_event_cancelled; 417139a9f02SKevin Wolf job->finalize_completed_notifier.notify = block_job_event_completed; 418139a9f02SKevin Wolf job->pending_notifier.notify = block_job_event_pending; 4192e1795b5SKevin Wolf job->ready_notifier.notify = block_job_event_ready; 42034dc97b9SKevin Wolf job->idle_notifier.notify = block_job_on_idle; 421139a9f02SKevin Wolf 422139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_cancelled, 423139a9f02SKevin Wolf &job->finalize_cancelled_notifier); 424139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_completed, 425139a9f02SKevin Wolf &job->finalize_completed_notifier); 426139a9f02SKevin Wolf notifier_list_add(&job->job.on_pending, &job->pending_notifier); 4272e1795b5SKevin Wolf notifier_list_add(&job->job.on_ready, &job->ready_notifier); 42834dc97b9SKevin Wolf notifier_list_add(&job->job.on_idle, &job->idle_notifier); 429139a9f02SKevin Wolf 43088691b37SPaolo Bonzini error_setg(&job->blocker, "block device is in use by block job: %s", 431252291eaSKevin Wolf job_type_str(&job->job)); 43288691b37SPaolo Bonzini block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); 43388691b37SPaolo Bonzini bs->job = job; 43488691b37SPaolo Bonzini 43588691b37SPaolo Bonzini bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 43688691b37SPaolo Bonzini 4379ff7f0dfSKevin Wolf blk_set_allow_aio_context_change(blk, true); 43888691b37SPaolo Bonzini 43988691b37SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 44088691b37SPaolo Bonzini if (speed != 0) { 44188691b37SPaolo Bonzini Error *local_err = NULL; 44288691b37SPaolo Bonzini 44388691b37SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 44488691b37SPaolo Bonzini if (local_err) { 4454ad35181SKevin Wolf job_early_fail(&job->job); 44688691b37SPaolo Bonzini error_propagate(errp, local_err); 44788691b37SPaolo Bonzini return NULL; 44888691b37SPaolo Bonzini } 44988691b37SPaolo Bonzini } 45075859b94SJohn Snow 45188691b37SPaolo Bonzini return job; 45288691b37SPaolo Bonzini } 45388691b37SPaolo Bonzini 4542caf63a9SPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 4552caf63a9SPaolo Bonzini { 4564c241cf5SPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 4574c241cf5SPaolo Bonzini return; 4584c241cf5SPaolo Bonzini } 459b15de828SKevin Wolf assert(job->job.user_paused && job->job.pause_count > 0); 4602caf63a9SPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 4612caf63a9SPaolo Bonzini } 4622caf63a9SPaolo Bonzini 463b15de828SKevin Wolf void block_job_user_resume(Job *job) 464b15de828SKevin Wolf { 465b15de828SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 466b15de828SKevin Wolf block_job_iostatus_reset(bjob); 467b15de828SKevin Wolf } 468b15de828SKevin Wolf 46981e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 47032c81a4aSPaolo Bonzini int is_read, int error) 47132c81a4aSPaolo Bonzini { 47232c81a4aSPaolo Bonzini BlockErrorAction action; 47332c81a4aSPaolo Bonzini 47432c81a4aSPaolo Bonzini switch (on_err) { 47532c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 4768c398252SKevin Wolf case BLOCKDEV_ON_ERROR_AUTO: 477a589569fSWenchao Xia action = (error == ENOSPC) ? 478a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 47932c81a4aSPaolo Bonzini break; 48032c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 481a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 48232c81a4aSPaolo Bonzini break; 48332c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 484a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 48532c81a4aSPaolo Bonzini break; 48632c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 487a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 48832c81a4aSPaolo Bonzini break; 48932c81a4aSPaolo Bonzini default: 49032c81a4aSPaolo Bonzini abort(); 49132c81a4aSPaolo Bonzini } 492559b935fSJohn Snow if (!block_job_is_internal(job)) { 49333e9e9bdSKevin Wolf qapi_event_send_block_job_error(job->job.id, 4945a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 4955a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 4963ab72385SPeter Xu action); 497559b935fSJohn Snow } 498a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 4998d9648cbSVladimir Sementsov-Ogievskiy if (!job->job.user_paused) { 500b15de828SKevin Wolf job_pause(&job->job); 501751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 502b15de828SKevin Wolf job->job.user_paused = true; 5038d9648cbSVladimir Sementsov-Ogievskiy } 50432c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 50532c81a4aSPaolo Bonzini } 50632c81a4aSPaolo Bonzini return action; 50732c81a4aSPaolo Bonzini } 508