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" 27737e150eSPaolo Bonzini #include "block/block.h" 28c87621eaSJohn Snow #include "block/blockjob_int.h" 29737e150eSPaolo Bonzini #include "block/block_int.h" 30c9de4050SJohn Snow #include "block/trace.h" 31373340b2SMax Reitz #include "sysemu/block-backend.h" 32e688df6bSMarkus Armbruster #include "qapi/error.h" 339af23989SMarkus Armbruster #include "qapi/qapi-events-block-core.h" 34cc7a8ea7SMarkus Armbruster #include "qapi/qmp/qerror.h" 3510817bf0SDaniel P. Berrange #include "qemu/coroutine.h" 36db725815SMarkus Armbruster #include "qemu/main-loop.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 8880fa2c75SKevin Wolf block_job_remove_all_bdrv(bjob); 8980fa2c75SKevin Wolf blk_unref(bjob->blk); 9080fa2c75SKevin Wolf error_free(bjob->blocker); 9105b0d8e3SPaolo Bonzini } 9205b0d8e3SPaolo Bonzini 93f321dcb5SPaolo Bonzini static char *child_job_get_parent_desc(BdrvChild *c) 94f321dcb5SPaolo Bonzini { 95f321dcb5SPaolo Bonzini BlockJob *job = c->opaque; 96252291eaSKevin Wolf return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id); 97f321dcb5SPaolo Bonzini } 98f321dcb5SPaolo Bonzini 99ad90febaSKevin Wolf static void child_job_drained_begin(BdrvChild *c) 100f321dcb5SPaolo Bonzini { 101ad90febaSKevin Wolf BlockJob *job = c->opaque; 102b15de828SKevin Wolf job_pause(&job->job); 103f321dcb5SPaolo Bonzini } 104f321dcb5SPaolo Bonzini 10589bd0305SKevin Wolf static bool child_job_drained_poll(BdrvChild *c) 10689bd0305SKevin Wolf { 10789bd0305SKevin Wolf BlockJob *bjob = c->opaque; 10889bd0305SKevin Wolf Job *job = &bjob->job; 10989bd0305SKevin Wolf const BlockJobDriver *drv = block_job_driver(bjob); 11089bd0305SKevin Wolf 11189bd0305SKevin Wolf /* An inactive or completed job doesn't have any pending requests. Jobs 11289bd0305SKevin Wolf * with !job->busy are either already paused or have a pause point after 11389bd0305SKevin Wolf * being reentered, so no job driver code will run before they pause. */ 114b5a7a057SKevin Wolf if (!job->busy || job_is_completed(job)) { 11589bd0305SKevin Wolf return false; 11689bd0305SKevin Wolf } 11789bd0305SKevin Wolf 11889bd0305SKevin Wolf /* Otherwise, assume that it isn't fully stopped yet, but allow the job to 11989bd0305SKevin Wolf * override this assumption. */ 12089bd0305SKevin Wolf if (drv->drained_poll) { 12189bd0305SKevin Wolf return drv->drained_poll(bjob); 12289bd0305SKevin Wolf } else { 12389bd0305SKevin Wolf return true; 12489bd0305SKevin Wolf } 12589bd0305SKevin Wolf } 12689bd0305SKevin Wolf 127e037c09cSMax Reitz static void child_job_drained_end(BdrvChild *c, int *drained_end_counter) 128f321dcb5SPaolo Bonzini { 129ad90febaSKevin Wolf BlockJob *job = c->opaque; 130b15de828SKevin Wolf job_resume(&job->job); 131f321dcb5SPaolo Bonzini } 132f321dcb5SPaolo Bonzini 1339ff7f0dfSKevin Wolf static bool child_job_can_set_aio_ctx(BdrvChild *c, AioContext *ctx, 1349ff7f0dfSKevin Wolf GSList **ignore, Error **errp) 1359ff7f0dfSKevin Wolf { 1369ff7f0dfSKevin Wolf BlockJob *job = c->opaque; 1379ff7f0dfSKevin Wolf GSList *l; 1389ff7f0dfSKevin Wolf 1399ff7f0dfSKevin Wolf for (l = job->nodes; l; l = l->next) { 1409ff7f0dfSKevin Wolf BdrvChild *sibling = l->data; 1419ff7f0dfSKevin Wolf if (!bdrv_child_can_set_aio_context(sibling, ctx, ignore, errp)) { 1429ff7f0dfSKevin Wolf return false; 1439ff7f0dfSKevin Wolf } 1449ff7f0dfSKevin Wolf } 1459ff7f0dfSKevin Wolf return true; 1469ff7f0dfSKevin Wolf } 1479ff7f0dfSKevin Wolf 1489ff7f0dfSKevin Wolf static void child_job_set_aio_ctx(BdrvChild *c, AioContext *ctx, 1499ff7f0dfSKevin Wolf GSList **ignore) 1509ff7f0dfSKevin Wolf { 1519ff7f0dfSKevin Wolf BlockJob *job = c->opaque; 1529ff7f0dfSKevin Wolf GSList *l; 1539ff7f0dfSKevin Wolf 1549ff7f0dfSKevin Wolf for (l = job->nodes; l; l = l->next) { 1559ff7f0dfSKevin Wolf BdrvChild *sibling = l->data; 1569ff7f0dfSKevin Wolf if (g_slist_find(*ignore, sibling)) { 1579ff7f0dfSKevin Wolf continue; 1589ff7f0dfSKevin Wolf } 1599ff7f0dfSKevin Wolf *ignore = g_slist_prepend(*ignore, sibling); 1609ff7f0dfSKevin Wolf bdrv_set_aio_context_ignore(sibling->bs, ctx, ignore); 1619ff7f0dfSKevin Wolf } 162657e1203SKevin Wolf 163657e1203SKevin Wolf job->job.aio_context = ctx; 1649ff7f0dfSKevin Wolf } 1659ff7f0dfSKevin Wolf 166ad90febaSKevin Wolf static const BdrvChildRole child_job = { 167ad90febaSKevin Wolf .get_parent_desc = child_job_get_parent_desc, 168ad90febaSKevin Wolf .drained_begin = child_job_drained_begin, 16989bd0305SKevin Wolf .drained_poll = child_job_drained_poll, 170ad90febaSKevin Wolf .drained_end = child_job_drained_end, 1719ff7f0dfSKevin Wolf .can_set_aio_ctx = child_job_can_set_aio_ctx, 1729ff7f0dfSKevin Wolf .set_aio_ctx = child_job_set_aio_ctx, 173ad90febaSKevin Wolf .stay_at_node = true, 174f321dcb5SPaolo Bonzini }; 175f321dcb5SPaolo Bonzini 176bbc02b90SKevin Wolf void block_job_remove_all_bdrv(BlockJob *job) 177bbc02b90SKevin Wolf { 178*d876bf67SSergio Lopez /* 179*d876bf67SSergio Lopez * bdrv_root_unref_child() may reach child_job_[can_]set_aio_ctx(), 180*d876bf67SSergio Lopez * which will also traverse job->nodes, so consume the list one by 181*d876bf67SSergio Lopez * one to make sure that such a concurrent access does not attempt 182*d876bf67SSergio Lopez * to process an already freed BdrvChild. 183*d876bf67SSergio Lopez */ 184*d876bf67SSergio Lopez while (job->nodes) { 185*d876bf67SSergio Lopez GSList *l = job->nodes; 186bbc02b90SKevin Wolf BdrvChild *c = l->data; 187*d876bf67SSergio Lopez 188*d876bf67SSergio Lopez job->nodes = l->next; 189*d876bf67SSergio Lopez 190bbc02b90SKevin Wolf bdrv_op_unblock_all(c->bs, job->blocker); 191bbc02b90SKevin Wolf bdrv_root_unref_child(c); 192*d876bf67SSergio Lopez 193*d876bf67SSergio Lopez g_slist_free_1(l); 194bbc02b90SKevin Wolf } 195bbc02b90SKevin Wolf } 196bbc02b90SKevin Wolf 1978164102fSVladimir Sementsov-Ogievskiy bool block_job_has_bdrv(BlockJob *job, BlockDriverState *bs) 1988164102fSVladimir Sementsov-Ogievskiy { 1998164102fSVladimir Sementsov-Ogievskiy GSList *el; 2008164102fSVladimir Sementsov-Ogievskiy 2018164102fSVladimir Sementsov-Ogievskiy for (el = job->nodes; el; el = el->next) { 2028164102fSVladimir Sementsov-Ogievskiy BdrvChild *c = el->data; 2038164102fSVladimir Sementsov-Ogievskiy if (c->bs == bs) { 2048164102fSVladimir Sementsov-Ogievskiy return true; 2058164102fSVladimir Sementsov-Ogievskiy } 2068164102fSVladimir Sementsov-Ogievskiy } 2078164102fSVladimir Sementsov-Ogievskiy 2088164102fSVladimir Sementsov-Ogievskiy return false; 2098164102fSVladimir Sementsov-Ogievskiy } 2108164102fSVladimir Sementsov-Ogievskiy 21176d554e2SKevin Wolf int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs, 21276d554e2SKevin Wolf uint64_t perm, uint64_t shared_perm, Error **errp) 21323d402d4SAlberto Garcia { 21476d554e2SKevin Wolf BdrvChild *c; 21576d554e2SKevin Wolf 216b441dc71SAlberto Garcia bdrv_ref(bs); 217132ada80SKevin Wolf if (job->job.aio_context != qemu_get_aio_context()) { 218132ada80SKevin Wolf aio_context_release(job->job.aio_context); 219132ada80SKevin Wolf } 220132ada80SKevin Wolf c = bdrv_root_attach_child(bs, name, &child_job, job->job.aio_context, 221132ada80SKevin Wolf perm, shared_perm, job, errp); 222132ada80SKevin Wolf if (job->job.aio_context != qemu_get_aio_context()) { 223132ada80SKevin Wolf aio_context_acquire(job->job.aio_context); 224132ada80SKevin Wolf } 22576d554e2SKevin Wolf if (c == NULL) { 22676d554e2SKevin Wolf return -EPERM; 22776d554e2SKevin Wolf } 22876d554e2SKevin Wolf 22976d554e2SKevin Wolf job->nodes = g_slist_prepend(job->nodes, c); 23023d402d4SAlberto Garcia bdrv_op_block_all(bs, job->blocker); 23176d554e2SKevin Wolf 23276d554e2SKevin Wolf return 0; 23323d402d4SAlberto Garcia } 23423d402d4SAlberto Garcia 23534dc97b9SKevin Wolf static void block_job_on_idle(Notifier *n, void *opaque) 23634dc97b9SKevin Wolf { 237cfe29d82SKevin Wolf aio_wait_kick(); 23834dc97b9SKevin Wolf } 23934dc97b9SKevin Wolf 240559b935fSJohn Snow bool block_job_is_internal(BlockJob *job) 241559b935fSJohn Snow { 24233e9e9bdSKevin Wolf return (job->job.id == NULL); 243559b935fSJohn Snow } 244559b935fSJohn Snow 245bd21935bSKevin Wolf const BlockJobDriver *block_job_driver(BlockJob *job) 246bd21935bSKevin Wolf { 2479f6bb4c0SKevin Wolf return container_of(job->job.driver, BlockJobDriver, job_driver); 248bd21935bSKevin Wolf } 249bd21935bSKevin Wolf 250da01ff7fSKevin Wolf /* Assumes the job_mutex is held */ 251da01ff7fSKevin Wolf static bool job_timer_pending(Job *job) 252da01ff7fSKevin Wolf { 253da01ff7fSKevin Wolf return timer_pending(&job->sleep_timer); 254da01ff7fSKevin Wolf } 255da01ff7fSKevin Wolf 2562f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 2572f0c9fe6SPaolo Bonzini { 258aa9ef2e6SJohn Snow int64_t old_speed = job->speed; 2592f0c9fe6SPaolo Bonzini 260a50c2ab8SKevin Wolf if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { 2610ec4dfb8SJohn Snow return; 2620ec4dfb8SJohn Snow } 26318bb6928SKevin Wolf if (speed < 0) { 26418bb6928SKevin Wolf error_setg(errp, QERR_INVALID_PARAMETER, "speed"); 2652f0c9fe6SPaolo Bonzini return; 2662f0c9fe6SPaolo Bonzini } 2672f0c9fe6SPaolo Bonzini 26818bb6928SKevin Wolf ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); 26918bb6928SKevin Wolf 2702f0c9fe6SPaolo Bonzini job->speed = speed; 271d4fce188SJohn Snow if (speed && speed <= old_speed) { 272aa9ef2e6SJohn Snow return; 273aa9ef2e6SJohn Snow } 274aa9ef2e6SJohn Snow 275aa9ef2e6SJohn Snow /* kick only if a timer is pending */ 276da01ff7fSKevin Wolf job_enter_cond(&job->job, job_timer_pending); 2772f0c9fe6SPaolo Bonzini } 2782f0c9fe6SPaolo Bonzini 279dee81d51SKevin Wolf int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) 280dee81d51SKevin Wolf { 281dee81d51SKevin Wolf if (!job->speed) { 282dee81d51SKevin Wolf return 0; 283dee81d51SKevin Wolf } 284dee81d51SKevin Wolf 285dee81d51SKevin Wolf return ratelimit_calculate_delay(&job->limit, n); 286dee81d51SKevin Wolf } 287dee81d51SKevin Wolf 288559b935fSJohn Snow BlockJobInfo *block_job_query(BlockJob *job, Error **errp) 28930e628b7SPaolo Bonzini { 290559b935fSJohn Snow BlockJobInfo *info; 291559b935fSJohn Snow 292559b935fSJohn Snow if (block_job_is_internal(job)) { 293559b935fSJohn Snow error_setg(errp, "Cannot query QEMU internal jobs"); 294559b935fSJohn Snow return NULL; 295559b935fSJohn Snow } 296559b935fSJohn Snow info = g_new0(BlockJobInfo, 1); 297252291eaSKevin Wolf info->type = g_strdup(job_type_str(&job->job)); 29833e9e9bdSKevin Wolf info->device = g_strdup(job->job.id); 299da01ff7fSKevin Wolf info->busy = atomic_read(&job->job.busy); 300da01ff7fSKevin Wolf info->paused = job->job.pause_count > 0; 30130a5c887SKevin Wolf info->offset = job->job.progress_current; 30230a5c887SKevin Wolf info->len = job->job.progress_total; 30330e628b7SPaolo Bonzini info->speed = job->speed; 30432c81a4aSPaolo Bonzini info->io_status = job->iostatus; 305df956ae2SKevin Wolf info->ready = job_is_ready(&job->job), 306a50c2ab8SKevin Wolf info->status = job->job.status; 307bb02b65cSKevin Wolf info->auto_finalize = job->job.auto_finalize; 308bb02b65cSKevin Wolf info->auto_dismiss = job->job.auto_dismiss; 3094ad35181SKevin Wolf info->has_error = job->job.ret != 0; 3104ad35181SKevin Wolf info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL; 31130e628b7SPaolo Bonzini return info; 31230e628b7SPaolo Bonzini } 31332c81a4aSPaolo Bonzini 31432c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 31532c81a4aSPaolo Bonzini { 31632c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 31732c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 31832c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 31932c81a4aSPaolo Bonzini } 32032c81a4aSPaolo Bonzini } 32132c81a4aSPaolo Bonzini 322139a9f02SKevin Wolf static void block_job_event_cancelled(Notifier *n, void *opaque) 323a66a2a36SPaolo Bonzini { 324139a9f02SKevin Wolf BlockJob *job = opaque; 325139a9f02SKevin Wolf 326559b935fSJohn Snow if (block_job_is_internal(job)) { 327559b935fSJohn Snow return; 328559b935fSJohn Snow } 329559b935fSJohn Snow 330252291eaSKevin Wolf qapi_event_send_block_job_cancelled(job_type(&job->job), 33133e9e9bdSKevin Wolf job->job.id, 33230a5c887SKevin Wolf job->job.progress_total, 33330a5c887SKevin Wolf job->job.progress_current, 3343ab72385SPeter Xu job->speed); 335a66a2a36SPaolo Bonzini } 336a66a2a36SPaolo Bonzini 337139a9f02SKevin Wolf static void block_job_event_completed(Notifier *n, void *opaque) 338a66a2a36SPaolo Bonzini { 339139a9f02SKevin Wolf BlockJob *job = opaque; 340139a9f02SKevin Wolf const char *msg = NULL; 341139a9f02SKevin Wolf 342559b935fSJohn Snow if (block_job_is_internal(job)) { 343559b935fSJohn Snow return; 344559b935fSJohn Snow } 345559b935fSJohn Snow 3464ad35181SKevin Wolf if (job->job.ret < 0) { 3474ad35181SKevin Wolf msg = strerror(-job->job.ret); 348139a9f02SKevin Wolf } 349139a9f02SKevin Wolf 350252291eaSKevin Wolf qapi_event_send_block_job_completed(job_type(&job->job), 35133e9e9bdSKevin Wolf job->job.id, 35230a5c887SKevin Wolf job->job.progress_total, 35330a5c887SKevin Wolf job->job.progress_current, 354bcada37bSWenchao Xia job->speed, 355bcada37bSWenchao Xia !!msg, 3563ab72385SPeter Xu msg); 357bcada37bSWenchao Xia } 358bcada37bSWenchao Xia 359139a9f02SKevin Wolf static void block_job_event_pending(Notifier *n, void *opaque) 3605f241594SJohn Snow { 361139a9f02SKevin Wolf BlockJob *job = opaque; 362139a9f02SKevin Wolf 3635d4f3769SKevin Wolf if (block_job_is_internal(job)) { 3645d4f3769SKevin Wolf return; 3655d4f3769SKevin Wolf } 3665d4f3769SKevin Wolf 367252291eaSKevin Wolf qapi_event_send_block_job_pending(job_type(&job->job), 3683ab72385SPeter Xu job->job.id); 3695f241594SJohn Snow } 3705f241594SJohn Snow 3712e1795b5SKevin Wolf static void block_job_event_ready(Notifier *n, void *opaque) 3722e1795b5SKevin Wolf { 3732e1795b5SKevin Wolf BlockJob *job = opaque; 3742e1795b5SKevin Wolf 3752e1795b5SKevin Wolf if (block_job_is_internal(job)) { 3762e1795b5SKevin Wolf return; 3772e1795b5SKevin Wolf } 3782e1795b5SKevin Wolf 3792e1795b5SKevin Wolf qapi_event_send_block_job_ready(job_type(&job->job), 3802e1795b5SKevin Wolf job->job.id, 38130a5c887SKevin Wolf job->job.progress_total, 38230a5c887SKevin Wolf job->job.progress_current, 3833ab72385SPeter Xu job->speed); 3842e1795b5SKevin Wolf } 3852e1795b5SKevin Wolf 3862e1795b5SKevin Wolf 38788691b37SPaolo Bonzini /* 38888691b37SPaolo Bonzini * API for block job drivers and the block layer. These functions are 38988691b37SPaolo Bonzini * declared in blockjob_int.h. 39088691b37SPaolo Bonzini */ 39188691b37SPaolo Bonzini 39288691b37SPaolo Bonzini void *block_job_create(const char *job_id, const BlockJobDriver *driver, 39362c9e416SKevin Wolf JobTxn *txn, BlockDriverState *bs, uint64_t perm, 39488691b37SPaolo Bonzini uint64_t shared_perm, int64_t speed, int flags, 39588691b37SPaolo Bonzini BlockCompletionFunc *cb, void *opaque, Error **errp) 39688691b37SPaolo Bonzini { 39788691b37SPaolo Bonzini BlockBackend *blk; 39888691b37SPaolo Bonzini BlockJob *job; 39988691b37SPaolo Bonzini int ret; 40088691b37SPaolo Bonzini 401bb02b65cSKevin Wolf if (job_id == NULL && !(flags & JOB_INTERNAL)) { 40288691b37SPaolo Bonzini job_id = bdrv_get_device_name(bs); 40388691b37SPaolo Bonzini } 40488691b37SPaolo Bonzini 405d861ab3aSKevin Wolf blk = blk_new(bdrv_get_aio_context(bs), perm, shared_perm); 40688691b37SPaolo Bonzini ret = blk_insert_bs(blk, bs, errp); 40788691b37SPaolo Bonzini if (ret < 0) { 40888691b37SPaolo Bonzini blk_unref(blk); 40988691b37SPaolo Bonzini return NULL; 41088691b37SPaolo Bonzini } 41188691b37SPaolo Bonzini 4127eaa8fb5SKevin Wolf job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), 4134ad35181SKevin Wolf flags, cb, opaque, errp); 41433e9e9bdSKevin Wolf if (job == NULL) { 41533e9e9bdSKevin Wolf blk_unref(blk); 41633e9e9bdSKevin Wolf return NULL; 41733e9e9bdSKevin Wolf } 41833e9e9bdSKevin Wolf 419e7c1d78bSKevin Wolf assert(is_block_job(&job->job)); 42080fa2c75SKevin Wolf assert(job->job.driver->free == &block_job_free); 421b15de828SKevin Wolf assert(job->job.driver->user_resume == &block_job_user_resume); 422e7c1d78bSKevin Wolf 42388691b37SPaolo Bonzini job->blk = blk; 42488691b37SPaolo Bonzini 425139a9f02SKevin Wolf job->finalize_cancelled_notifier.notify = block_job_event_cancelled; 426139a9f02SKevin Wolf job->finalize_completed_notifier.notify = block_job_event_completed; 427139a9f02SKevin Wolf job->pending_notifier.notify = block_job_event_pending; 4282e1795b5SKevin Wolf job->ready_notifier.notify = block_job_event_ready; 42934dc97b9SKevin Wolf job->idle_notifier.notify = block_job_on_idle; 430139a9f02SKevin Wolf 431139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_cancelled, 432139a9f02SKevin Wolf &job->finalize_cancelled_notifier); 433139a9f02SKevin Wolf notifier_list_add(&job->job.on_finalize_completed, 434139a9f02SKevin Wolf &job->finalize_completed_notifier); 435139a9f02SKevin Wolf notifier_list_add(&job->job.on_pending, &job->pending_notifier); 4362e1795b5SKevin Wolf notifier_list_add(&job->job.on_ready, &job->ready_notifier); 43734dc97b9SKevin Wolf notifier_list_add(&job->job.on_idle, &job->idle_notifier); 438139a9f02SKevin Wolf 43988691b37SPaolo Bonzini error_setg(&job->blocker, "block device is in use by block job: %s", 440252291eaSKevin Wolf job_type_str(&job->job)); 44188691b37SPaolo Bonzini block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); 44288691b37SPaolo Bonzini 44388691b37SPaolo Bonzini bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 44488691b37SPaolo Bonzini 445cf312932SKevin Wolf /* Disable request queuing in the BlockBackend to avoid deadlocks on drain: 446cf312932SKevin Wolf * The job reports that it's busy until it reaches a pause point. */ 447cf312932SKevin Wolf blk_set_disable_request_queuing(blk, true); 4489ff7f0dfSKevin Wolf blk_set_allow_aio_context_change(blk, true); 44988691b37SPaolo Bonzini 45088691b37SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 45188691b37SPaolo Bonzini if (speed != 0) { 45288691b37SPaolo Bonzini Error *local_err = NULL; 45388691b37SPaolo Bonzini 45488691b37SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 45588691b37SPaolo Bonzini if (local_err) { 4564ad35181SKevin Wolf job_early_fail(&job->job); 45788691b37SPaolo Bonzini error_propagate(errp, local_err); 45888691b37SPaolo Bonzini return NULL; 45988691b37SPaolo Bonzini } 46088691b37SPaolo Bonzini } 46175859b94SJohn Snow 46288691b37SPaolo Bonzini return job; 46388691b37SPaolo Bonzini } 46488691b37SPaolo Bonzini 4652caf63a9SPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 4662caf63a9SPaolo Bonzini { 4674c241cf5SPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 4684c241cf5SPaolo Bonzini return; 4694c241cf5SPaolo Bonzini } 470b15de828SKevin Wolf assert(job->job.user_paused && job->job.pause_count > 0); 4712caf63a9SPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 4722caf63a9SPaolo Bonzini } 4732caf63a9SPaolo Bonzini 474b15de828SKevin Wolf void block_job_user_resume(Job *job) 475b15de828SKevin Wolf { 476b15de828SKevin Wolf BlockJob *bjob = container_of(job, BlockJob, job); 477b15de828SKevin Wolf block_job_iostatus_reset(bjob); 478b15de828SKevin Wolf } 479b15de828SKevin Wolf 48081e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 48132c81a4aSPaolo Bonzini int is_read, int error) 48232c81a4aSPaolo Bonzini { 48332c81a4aSPaolo Bonzini BlockErrorAction action; 48432c81a4aSPaolo Bonzini 48532c81a4aSPaolo Bonzini switch (on_err) { 48632c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 4878c398252SKevin Wolf case BLOCKDEV_ON_ERROR_AUTO: 488a589569fSWenchao Xia action = (error == ENOSPC) ? 489a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 49032c81a4aSPaolo Bonzini break; 49132c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 492a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 49332c81a4aSPaolo Bonzini break; 49432c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 495a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 49632c81a4aSPaolo Bonzini break; 49732c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 498a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 49932c81a4aSPaolo Bonzini break; 50032c81a4aSPaolo Bonzini default: 50132c81a4aSPaolo Bonzini abort(); 50232c81a4aSPaolo Bonzini } 503559b935fSJohn Snow if (!block_job_is_internal(job)) { 50433e9e9bdSKevin Wolf qapi_event_send_block_job_error(job->job.id, 5055a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 5065a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 5073ab72385SPeter Xu action); 508559b935fSJohn Snow } 509a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 5108d9648cbSVladimir Sementsov-Ogievskiy if (!job->job.user_paused) { 511b15de828SKevin Wolf job_pause(&job->job); 512751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 513b15de828SKevin Wolf job->job.user_paused = true; 5148d9648cbSVladimir Sementsov-Ogievskiy } 51532c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 51632c81a4aSPaolo Bonzini } 51732c81a4aSPaolo Bonzini return action; 51832c81a4aSPaolo Bonzini } 519