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" 282f0c9fe6SPaolo Bonzini #include "trace.h" 29737e150eSPaolo Bonzini #include "block/block.h" 30737e150eSPaolo Bonzini #include "block/blockjob.h" 31737e150eSPaolo Bonzini #include "block/block_int.h" 32373340b2SMax Reitz #include "sysemu/block-backend.h" 33cc7a8ea7SMarkus Armbruster #include "qapi/qmp/qerror.h" 347b1b5d19SPaolo Bonzini #include "qapi/qmp/qjson.h" 3510817bf0SDaniel P. Berrange #include "qemu/coroutine.h" 362f0c9fe6SPaolo Bonzini #include "qmp-commands.h" 371de7afc9SPaolo Bonzini #include "qemu/timer.h" 385a2d2cbdSWenchao Xia #include "qapi-event.h" 392f0c9fe6SPaolo Bonzini 40c55a832fSFam Zheng /* Transactional group of block jobs */ 41c55a832fSFam Zheng struct BlockJobTxn { 42c55a832fSFam Zheng 43c55a832fSFam Zheng /* Is this txn being cancelled? */ 44c55a832fSFam Zheng bool aborting; 45c55a832fSFam Zheng 46c55a832fSFam Zheng /* List of jobs */ 47c55a832fSFam Zheng QLIST_HEAD(, BlockJob) jobs; 48c55a832fSFam Zheng 49c55a832fSFam Zheng /* Reference count */ 50c55a832fSFam Zheng int refcnt; 51c55a832fSFam Zheng }; 52c55a832fSFam Zheng 53*a7112795SAlberto Garcia static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs); 54*a7112795SAlberto Garcia 55*a7112795SAlberto Garcia BlockJob *block_job_next(BlockJob *job) 56*a7112795SAlberto Garcia { 57*a7112795SAlberto Garcia if (!job) { 58*a7112795SAlberto Garcia return QLIST_FIRST(&block_jobs); 59*a7112795SAlberto Garcia } 60*a7112795SAlberto Garcia return QLIST_NEXT(job, job_list); 61*a7112795SAlberto Garcia } 62*a7112795SAlberto Garcia 633fc4b10aSFam Zheng void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs, 64097310b5SMarkus Armbruster int64_t speed, BlockCompletionFunc *cb, 652f0c9fe6SPaolo Bonzini void *opaque, Error **errp) 662f0c9fe6SPaolo Bonzini { 672f0c9fe6SPaolo Bonzini BlockJob *job; 682f0c9fe6SPaolo Bonzini 69628ff683SFam Zheng if (bs->job) { 70c6bd8c70SMarkus Armbruster error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 712f0c9fe6SPaolo Bonzini return NULL; 722f0c9fe6SPaolo Bonzini } 73fa510ebfSFam Zheng bdrv_ref(bs); 743fc4b10aSFam Zheng job = g_malloc0(driver->instance_size); 753718d8abSFam Zheng error_setg(&job->blocker, "block device is in use by block job: %s", 763718d8abSFam Zheng BlockJobType_lookup[driver->job_type]); 773718d8abSFam Zheng bdrv_op_block_all(bs, job->blocker); 78b112a65cSStefan Hajnoczi bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); 793718d8abSFam Zheng 803fc4b10aSFam Zheng job->driver = driver; 818ccb9569SKevin Wolf job->id = g_strdup(bdrv_get_device_name(bs)); 822f0c9fe6SPaolo Bonzini job->bs = bs; 832f0c9fe6SPaolo Bonzini job->cb = cb; 842f0c9fe6SPaolo Bonzini job->opaque = opaque; 852f0c9fe6SPaolo Bonzini job->busy = true; 8618930ba3SFam Zheng job->refcnt = 1; 872f0c9fe6SPaolo Bonzini bs->job = job; 882f0c9fe6SPaolo Bonzini 89*a7112795SAlberto Garcia QLIST_INSERT_HEAD(&block_jobs, job, job_list); 90*a7112795SAlberto Garcia 912f0c9fe6SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 922f0c9fe6SPaolo Bonzini if (speed != 0) { 932f0c9fe6SPaolo Bonzini Error *local_err = NULL; 942f0c9fe6SPaolo Bonzini 952f0c9fe6SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 9684d18f06SMarkus Armbruster if (local_err) { 9718930ba3SFam Zheng block_job_unref(job); 982f0c9fe6SPaolo Bonzini error_propagate(errp, local_err); 992f0c9fe6SPaolo Bonzini return NULL; 1002f0c9fe6SPaolo Bonzini } 1012f0c9fe6SPaolo Bonzini } 1022f0c9fe6SPaolo Bonzini return job; 1032f0c9fe6SPaolo Bonzini } 1042f0c9fe6SPaolo Bonzini 10518930ba3SFam Zheng void block_job_ref(BlockJob *job) 10697031164STing Wang { 10718930ba3SFam Zheng ++job->refcnt; 10818930ba3SFam Zheng } 10997031164STing Wang 11018930ba3SFam Zheng void block_job_unref(BlockJob *job) 11118930ba3SFam Zheng { 11218930ba3SFam Zheng if (--job->refcnt == 0) { 11318930ba3SFam Zheng job->bs->job = NULL; 11418930ba3SFam Zheng bdrv_op_unblock_all(job->bs, job->blocker); 11518930ba3SFam Zheng bdrv_unref(job->bs); 11697031164STing Wang error_free(job->blocker); 1178ccb9569SKevin Wolf g_free(job->id); 118*a7112795SAlberto Garcia QLIST_REMOVE(job, job_list); 11997031164STing Wang g_free(job); 12097031164STing Wang } 12118930ba3SFam Zheng } 12297031164STing Wang 123c55a832fSFam Zheng static void block_job_completed_single(BlockJob *job) 124c55a832fSFam Zheng { 125c55a832fSFam Zheng if (!job->ret) { 126c55a832fSFam Zheng if (job->driver->commit) { 127c55a832fSFam Zheng job->driver->commit(job); 128c55a832fSFam Zheng } 129c55a832fSFam Zheng } else { 130c55a832fSFam Zheng if (job->driver->abort) { 131c55a832fSFam Zheng job->driver->abort(job); 132c55a832fSFam Zheng } 133c55a832fSFam Zheng } 134c55a832fSFam Zheng job->cb(job->opaque, job->ret); 135c55a832fSFam Zheng if (job->txn) { 136c55a832fSFam Zheng block_job_txn_unref(job->txn); 137c55a832fSFam Zheng } 138c55a832fSFam Zheng block_job_unref(job); 139c55a832fSFam Zheng } 140c55a832fSFam Zheng 141c55a832fSFam Zheng static void block_job_completed_txn_abort(BlockJob *job) 142c55a832fSFam Zheng { 143c55a832fSFam Zheng AioContext *ctx; 144c55a832fSFam Zheng BlockJobTxn *txn = job->txn; 145c55a832fSFam Zheng BlockJob *other_job, *next; 146c55a832fSFam Zheng 147c55a832fSFam Zheng if (txn->aborting) { 148c55a832fSFam Zheng /* 149c55a832fSFam Zheng * We are cancelled by another job, which will handle everything. 150c55a832fSFam Zheng */ 151c55a832fSFam Zheng return; 152c55a832fSFam Zheng } 153c55a832fSFam Zheng txn->aborting = true; 154c55a832fSFam Zheng /* We are the first failed job. Cancel other jobs. */ 155c55a832fSFam Zheng QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 156c55a832fSFam Zheng ctx = bdrv_get_aio_context(other_job->bs); 157c55a832fSFam Zheng aio_context_acquire(ctx); 158c55a832fSFam Zheng } 159c55a832fSFam Zheng QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 160c55a832fSFam Zheng if (other_job == job || other_job->completed) { 161c55a832fSFam Zheng /* Other jobs are "effectively" cancelled by us, set the status for 162c55a832fSFam Zheng * them; this job, however, may or may not be cancelled, depending 163c55a832fSFam Zheng * on the caller, so leave it. */ 164c55a832fSFam Zheng if (other_job != job) { 165c55a832fSFam Zheng other_job->cancelled = true; 166c55a832fSFam Zheng } 167c55a832fSFam Zheng continue; 168c55a832fSFam Zheng } 169c55a832fSFam Zheng block_job_cancel_sync(other_job); 170c55a832fSFam Zheng assert(other_job->completed); 171c55a832fSFam Zheng } 172c55a832fSFam Zheng QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { 173c55a832fSFam Zheng ctx = bdrv_get_aio_context(other_job->bs); 174c55a832fSFam Zheng block_job_completed_single(other_job); 175c55a832fSFam Zheng aio_context_release(ctx); 176c55a832fSFam Zheng } 177c55a832fSFam Zheng } 178c55a832fSFam Zheng 179c55a832fSFam Zheng static void block_job_completed_txn_success(BlockJob *job) 180c55a832fSFam Zheng { 181c55a832fSFam Zheng AioContext *ctx; 182c55a832fSFam Zheng BlockJobTxn *txn = job->txn; 183c55a832fSFam Zheng BlockJob *other_job, *next; 184c55a832fSFam Zheng /* 185c55a832fSFam Zheng * Successful completion, see if there are other running jobs in this 186c55a832fSFam Zheng * txn. 187c55a832fSFam Zheng */ 188c55a832fSFam Zheng QLIST_FOREACH(other_job, &txn->jobs, txn_list) { 189c55a832fSFam Zheng if (!other_job->completed) { 190c55a832fSFam Zheng return; 191c55a832fSFam Zheng } 192c55a832fSFam Zheng } 193c55a832fSFam Zheng /* We are the last completed job, commit the transaction. */ 194c55a832fSFam Zheng QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) { 195c55a832fSFam Zheng ctx = bdrv_get_aio_context(other_job->bs); 196c55a832fSFam Zheng aio_context_acquire(ctx); 197c55a832fSFam Zheng assert(other_job->ret == 0); 198c55a832fSFam Zheng block_job_completed_single(other_job); 199c55a832fSFam Zheng aio_context_release(ctx); 200c55a832fSFam Zheng } 201c55a832fSFam Zheng } 202c55a832fSFam Zheng 20365f46322SPaolo Bonzini void block_job_completed(BlockJob *job, int ret) 2042f0c9fe6SPaolo Bonzini { 2052f0c9fe6SPaolo Bonzini BlockDriverState *bs = job->bs; 2062f0c9fe6SPaolo Bonzini 2072f0c9fe6SPaolo Bonzini assert(bs->job == job); 208a689dbf2SFam Zheng assert(!job->completed); 209a689dbf2SFam Zheng job->completed = true; 210a689dbf2SFam Zheng job->ret = ret; 211c55a832fSFam Zheng if (!job->txn) { 212c55a832fSFam Zheng block_job_completed_single(job); 213c55a832fSFam Zheng } else if (ret < 0 || block_job_is_cancelled(job)) { 214c55a832fSFam Zheng block_job_completed_txn_abort(job); 215c55a832fSFam Zheng } else { 216c55a832fSFam Zheng block_job_completed_txn_success(job); 217c55a832fSFam Zheng } 2182f0c9fe6SPaolo Bonzini } 2192f0c9fe6SPaolo Bonzini 2202f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 2212f0c9fe6SPaolo Bonzini { 2222f0c9fe6SPaolo Bonzini Error *local_err = NULL; 2232f0c9fe6SPaolo Bonzini 2243fc4b10aSFam Zheng if (!job->driver->set_speed) { 225c6bd8c70SMarkus Armbruster error_setg(errp, QERR_UNSUPPORTED); 2262f0c9fe6SPaolo Bonzini return; 2272f0c9fe6SPaolo Bonzini } 2283fc4b10aSFam Zheng job->driver->set_speed(job, speed, &local_err); 22984d18f06SMarkus Armbruster if (local_err) { 2302f0c9fe6SPaolo Bonzini error_propagate(errp, local_err); 2312f0c9fe6SPaolo Bonzini return; 2322f0c9fe6SPaolo Bonzini } 2332f0c9fe6SPaolo Bonzini 2342f0c9fe6SPaolo Bonzini job->speed = speed; 2352f0c9fe6SPaolo Bonzini } 2362f0c9fe6SPaolo Bonzini 237aeae883bSPaolo Bonzini void block_job_complete(BlockJob *job, Error **errp) 238aeae883bSPaolo Bonzini { 239751ebd76SFam Zheng if (job->pause_count || job->cancelled || !job->driver->complete) { 2408ccb9569SKevin Wolf error_setg(errp, QERR_BLOCK_JOB_NOT_READY, job->id); 241aeae883bSPaolo Bonzini return; 242aeae883bSPaolo Bonzini } 243aeae883bSPaolo Bonzini 2443fc4b10aSFam Zheng job->driver->complete(job, errp); 245aeae883bSPaolo Bonzini } 246aeae883bSPaolo Bonzini 2478acc72a4SPaolo Bonzini void block_job_pause(BlockJob *job) 2482f0c9fe6SPaolo Bonzini { 249751ebd76SFam Zheng job->pause_count++; 2508acc72a4SPaolo Bonzini } 2518acc72a4SPaolo Bonzini 2528acc72a4SPaolo Bonzini bool block_job_is_paused(BlockJob *job) 2538acc72a4SPaolo Bonzini { 254751ebd76SFam Zheng return job->pause_count > 0; 2558acc72a4SPaolo Bonzini } 2568acc72a4SPaolo Bonzini 2578acc72a4SPaolo Bonzini void block_job_resume(BlockJob *job) 2588acc72a4SPaolo Bonzini { 259751ebd76SFam Zheng assert(job->pause_count > 0); 260751ebd76SFam Zheng job->pause_count--; 261751ebd76SFam Zheng if (job->pause_count) { 262751ebd76SFam Zheng return; 263751ebd76SFam Zheng } 264751ebd76SFam Zheng block_job_enter(job); 265751ebd76SFam Zheng } 266751ebd76SFam Zheng 267751ebd76SFam Zheng void block_job_enter(BlockJob *job) 268751ebd76SFam Zheng { 26932c81a4aSPaolo Bonzini block_job_iostatus_reset(job); 2702f0c9fe6SPaolo Bonzini if (job->co && !job->busy) { 2712f0c9fe6SPaolo Bonzini qemu_coroutine_enter(job->co, NULL); 2722f0c9fe6SPaolo Bonzini } 2732f0c9fe6SPaolo Bonzini } 2742f0c9fe6SPaolo Bonzini 2758acc72a4SPaolo Bonzini void block_job_cancel(BlockJob *job) 2768acc72a4SPaolo Bonzini { 2778acc72a4SPaolo Bonzini job->cancelled = true; 278751ebd76SFam Zheng block_job_enter(job); 2798acc72a4SPaolo Bonzini } 2808acc72a4SPaolo Bonzini 2812f0c9fe6SPaolo Bonzini bool block_job_is_cancelled(BlockJob *job) 2822f0c9fe6SPaolo Bonzini { 2832f0c9fe6SPaolo Bonzini return job->cancelled; 2842f0c9fe6SPaolo Bonzini } 2852f0c9fe6SPaolo Bonzini 28632c81a4aSPaolo Bonzini void block_job_iostatus_reset(BlockJob *job) 28732c81a4aSPaolo Bonzini { 28832c81a4aSPaolo Bonzini job->iostatus = BLOCK_DEVICE_IO_STATUS_OK; 2893fc4b10aSFam Zheng if (job->driver->iostatus_reset) { 2903fc4b10aSFam Zheng job->driver->iostatus_reset(job); 2913bd293c3SPaolo Bonzini } 29232c81a4aSPaolo Bonzini } 29332c81a4aSPaolo Bonzini 294345f9e1bSMax Reitz static int block_job_finish_sync(BlockJob *job, 295345f9e1bSMax Reitz void (*finish)(BlockJob *, Error **errp), 296345f9e1bSMax Reitz Error **errp) 2972f0c9fe6SPaolo Bonzini { 2982f0c9fe6SPaolo Bonzini BlockDriverState *bs = job->bs; 299345f9e1bSMax Reitz Error *local_err = NULL; 30094db6d2dSFam Zheng int ret; 3012f0c9fe6SPaolo Bonzini 3022f0c9fe6SPaolo Bonzini assert(bs->job == job); 3032f0c9fe6SPaolo Bonzini 30494db6d2dSFam Zheng block_job_ref(job); 305345f9e1bSMax Reitz finish(job, &local_err); 306345f9e1bSMax Reitz if (local_err) { 307345f9e1bSMax Reitz error_propagate(errp, local_err); 30894db6d2dSFam Zheng block_job_unref(job); 309345f9e1bSMax Reitz return -EBUSY; 310345f9e1bSMax Reitz } 31194db6d2dSFam Zheng while (!job->completed) { 312794f0141SFam Zheng aio_poll(job->deferred_to_main_loop ? qemu_get_aio_context() : 313794f0141SFam Zheng bdrv_get_aio_context(bs), 314794f0141SFam Zheng true); 3152f0c9fe6SPaolo Bonzini } 31694db6d2dSFam Zheng ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret; 31794db6d2dSFam Zheng block_job_unref(job); 31894db6d2dSFam Zheng return ret; 3192f0c9fe6SPaolo Bonzini } 3202f0c9fe6SPaolo Bonzini 321345f9e1bSMax Reitz /* A wrapper around block_job_cancel() taking an Error ** parameter so it may be 322345f9e1bSMax Reitz * used with block_job_finish_sync() without the need for (rather nasty) 323345f9e1bSMax Reitz * function pointer casts there. */ 324345f9e1bSMax Reitz static void block_job_cancel_err(BlockJob *job, Error **errp) 325345f9e1bSMax Reitz { 326345f9e1bSMax Reitz block_job_cancel(job); 327345f9e1bSMax Reitz } 328345f9e1bSMax Reitz 329345f9e1bSMax Reitz int block_job_cancel_sync(BlockJob *job) 330345f9e1bSMax Reitz { 331345f9e1bSMax Reitz return block_job_finish_sync(job, &block_job_cancel_err, NULL); 332345f9e1bSMax Reitz } 333345f9e1bSMax Reitz 334345f9e1bSMax Reitz int block_job_complete_sync(BlockJob *job, Error **errp) 335345f9e1bSMax Reitz { 336345f9e1bSMax Reitz return block_job_finish_sync(job, &block_job_complete, errp); 337345f9e1bSMax Reitz } 338345f9e1bSMax Reitz 3397483d1e5SAlex Bligh void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns) 3402f0c9fe6SPaolo Bonzini { 3418acc72a4SPaolo Bonzini assert(job->busy); 3428acc72a4SPaolo Bonzini 3432f0c9fe6SPaolo Bonzini /* Check cancellation *before* setting busy = false, too! */ 3448acc72a4SPaolo Bonzini if (block_job_is_cancelled(job)) { 3458acc72a4SPaolo Bonzini return; 3462f0c9fe6SPaolo Bonzini } 3478acc72a4SPaolo Bonzini 3488acc72a4SPaolo Bonzini job->busy = false; 3498acc72a4SPaolo Bonzini if (block_job_is_paused(job)) { 3508acc72a4SPaolo Bonzini qemu_coroutine_yield(); 3518acc72a4SPaolo Bonzini } else { 3520b9caf9bSFam Zheng co_aio_sleep_ns(bdrv_get_aio_context(job->bs), type, ns); 3538acc72a4SPaolo Bonzini } 3548acc72a4SPaolo Bonzini job->busy = true; 3552f0c9fe6SPaolo Bonzini } 35630e628b7SPaolo Bonzini 357dc71ce45SFam Zheng void block_job_yield(BlockJob *job) 358dc71ce45SFam Zheng { 359dc71ce45SFam Zheng assert(job->busy); 360dc71ce45SFam Zheng 361dc71ce45SFam Zheng /* Check cancellation *before* setting busy = false, too! */ 362dc71ce45SFam Zheng if (block_job_is_cancelled(job)) { 363dc71ce45SFam Zheng return; 364dc71ce45SFam Zheng } 365dc71ce45SFam Zheng 366dc71ce45SFam Zheng job->busy = false; 367dc71ce45SFam Zheng qemu_coroutine_yield(); 368dc71ce45SFam Zheng job->busy = true; 369dc71ce45SFam Zheng } 370dc71ce45SFam Zheng 37130e628b7SPaolo Bonzini BlockJobInfo *block_job_query(BlockJob *job) 37230e628b7SPaolo Bonzini { 37330e628b7SPaolo Bonzini BlockJobInfo *info = g_new0(BlockJobInfo, 1); 37479e14bf7SFam Zheng info->type = g_strdup(BlockJobType_lookup[job->driver->job_type]); 3758ccb9569SKevin Wolf info->device = g_strdup(job->id); 37630e628b7SPaolo Bonzini info->len = job->len; 3778d65883fSPaolo Bonzini info->busy = job->busy; 378751ebd76SFam Zheng info->paused = job->pause_count > 0; 37930e628b7SPaolo Bonzini info->offset = job->offset; 38030e628b7SPaolo Bonzini info->speed = job->speed; 38132c81a4aSPaolo Bonzini info->io_status = job->iostatus; 382ef6dbf1eSMax Reitz info->ready = job->ready; 38330e628b7SPaolo Bonzini return info; 38430e628b7SPaolo Bonzini } 38532c81a4aSPaolo Bonzini 38632c81a4aSPaolo Bonzini static void block_job_iostatus_set_err(BlockJob *job, int error) 38732c81a4aSPaolo Bonzini { 38832c81a4aSPaolo Bonzini if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) { 38932c81a4aSPaolo Bonzini job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE : 39032c81a4aSPaolo Bonzini BLOCK_DEVICE_IO_STATUS_FAILED; 39132c81a4aSPaolo Bonzini } 39232c81a4aSPaolo Bonzini } 39332c81a4aSPaolo Bonzini 394bcada37bSWenchao Xia void block_job_event_cancelled(BlockJob *job) 395a66a2a36SPaolo Bonzini { 396bcada37bSWenchao Xia qapi_event_send_block_job_cancelled(job->driver->job_type, 3978ccb9569SKevin Wolf job->id, 398a66a2a36SPaolo Bonzini job->len, 399a66a2a36SPaolo Bonzini job->offset, 400bcada37bSWenchao Xia job->speed, 401bcada37bSWenchao Xia &error_abort); 402a66a2a36SPaolo Bonzini } 403a66a2a36SPaolo Bonzini 404bcada37bSWenchao Xia void block_job_event_completed(BlockJob *job, const char *msg) 405a66a2a36SPaolo Bonzini { 406bcada37bSWenchao Xia qapi_event_send_block_job_completed(job->driver->job_type, 4078ccb9569SKevin Wolf job->id, 408bcada37bSWenchao Xia job->len, 409bcada37bSWenchao Xia job->offset, 410bcada37bSWenchao Xia job->speed, 411bcada37bSWenchao Xia !!msg, 412bcada37bSWenchao Xia msg, 413bcada37bSWenchao Xia &error_abort); 414bcada37bSWenchao Xia } 415bcada37bSWenchao Xia 416bcada37bSWenchao Xia void block_job_event_ready(BlockJob *job) 417bcada37bSWenchao Xia { 418ef6dbf1eSMax Reitz job->ready = true; 419ef6dbf1eSMax Reitz 420518848a2SMarkus Armbruster qapi_event_send_block_job_ready(job->driver->job_type, 4218ccb9569SKevin Wolf job->id, 422518848a2SMarkus Armbruster job->len, 423518848a2SMarkus Armbruster job->offset, 424518848a2SMarkus Armbruster job->speed, &error_abort); 425a66a2a36SPaolo Bonzini } 426a66a2a36SPaolo Bonzini 42781e254dcSKevin Wolf BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err, 42832c81a4aSPaolo Bonzini int is_read, int error) 42932c81a4aSPaolo Bonzini { 43032c81a4aSPaolo Bonzini BlockErrorAction action; 43132c81a4aSPaolo Bonzini 43232c81a4aSPaolo Bonzini switch (on_err) { 43332c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_ENOSPC: 434a589569fSWenchao Xia action = (error == ENOSPC) ? 435a589569fSWenchao Xia BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT; 43632c81a4aSPaolo Bonzini break; 43732c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_STOP: 438a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_STOP; 43932c81a4aSPaolo Bonzini break; 44032c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_REPORT: 441a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_REPORT; 44232c81a4aSPaolo Bonzini break; 44332c81a4aSPaolo Bonzini case BLOCKDEV_ON_ERROR_IGNORE: 444a589569fSWenchao Xia action = BLOCK_ERROR_ACTION_IGNORE; 44532c81a4aSPaolo Bonzini break; 44632c81a4aSPaolo Bonzini default: 44732c81a4aSPaolo Bonzini abort(); 44832c81a4aSPaolo Bonzini } 4498ccb9569SKevin Wolf qapi_event_send_block_job_error(job->id, 4505a2d2cbdSWenchao Xia is_read ? IO_OPERATION_TYPE_READ : 4515a2d2cbdSWenchao Xia IO_OPERATION_TYPE_WRITE, 4525a2d2cbdSWenchao Xia action, &error_abort); 453a589569fSWenchao Xia if (action == BLOCK_ERROR_ACTION_STOP) { 454751ebd76SFam Zheng /* make the pause user visible, which will be resumed from QMP. */ 455751ebd76SFam Zheng job->user_paused = true; 45632c81a4aSPaolo Bonzini block_job_pause(job); 45732c81a4aSPaolo Bonzini block_job_iostatus_set_err(job, error); 45832c81a4aSPaolo Bonzini } 45932c81a4aSPaolo Bonzini return action; 46032c81a4aSPaolo Bonzini } 461dec7d421SStefan Hajnoczi 462dec7d421SStefan Hajnoczi typedef struct { 463dec7d421SStefan Hajnoczi BlockJob *job; 464dec7d421SStefan Hajnoczi QEMUBH *bh; 465dec7d421SStefan Hajnoczi AioContext *aio_context; 466dec7d421SStefan Hajnoczi BlockJobDeferToMainLoopFn *fn; 467dec7d421SStefan Hajnoczi void *opaque; 468dec7d421SStefan Hajnoczi } BlockJobDeferToMainLoopData; 469dec7d421SStefan Hajnoczi 470dec7d421SStefan Hajnoczi static void block_job_defer_to_main_loop_bh(void *opaque) 471dec7d421SStefan Hajnoczi { 472dec7d421SStefan Hajnoczi BlockJobDeferToMainLoopData *data = opaque; 473dec7d421SStefan Hajnoczi AioContext *aio_context; 474dec7d421SStefan Hajnoczi 475dec7d421SStefan Hajnoczi qemu_bh_delete(data->bh); 476dec7d421SStefan Hajnoczi 477dec7d421SStefan Hajnoczi /* Prevent race with block_job_defer_to_main_loop() */ 478dec7d421SStefan Hajnoczi aio_context_acquire(data->aio_context); 479dec7d421SStefan Hajnoczi 480dec7d421SStefan Hajnoczi /* Fetch BDS AioContext again, in case it has changed */ 481dec7d421SStefan Hajnoczi aio_context = bdrv_get_aio_context(data->job->bs); 482dec7d421SStefan Hajnoczi aio_context_acquire(aio_context); 483dec7d421SStefan Hajnoczi 484794f0141SFam Zheng data->job->deferred_to_main_loop = false; 485dec7d421SStefan Hajnoczi data->fn(data->job, data->opaque); 486dec7d421SStefan Hajnoczi 487dec7d421SStefan Hajnoczi aio_context_release(aio_context); 488dec7d421SStefan Hajnoczi 489dec7d421SStefan Hajnoczi aio_context_release(data->aio_context); 490dec7d421SStefan Hajnoczi 491dec7d421SStefan Hajnoczi g_free(data); 492dec7d421SStefan Hajnoczi } 493dec7d421SStefan Hajnoczi 494dec7d421SStefan Hajnoczi void block_job_defer_to_main_loop(BlockJob *job, 495dec7d421SStefan Hajnoczi BlockJobDeferToMainLoopFn *fn, 496dec7d421SStefan Hajnoczi void *opaque) 497dec7d421SStefan Hajnoczi { 498dec7d421SStefan Hajnoczi BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data)); 499dec7d421SStefan Hajnoczi data->job = job; 500dec7d421SStefan Hajnoczi data->bh = qemu_bh_new(block_job_defer_to_main_loop_bh, data); 501dec7d421SStefan Hajnoczi data->aio_context = bdrv_get_aio_context(job->bs); 502dec7d421SStefan Hajnoczi data->fn = fn; 503dec7d421SStefan Hajnoczi data->opaque = opaque; 504794f0141SFam Zheng job->deferred_to_main_loop = true; 505dec7d421SStefan Hajnoczi 506dec7d421SStefan Hajnoczi qemu_bh_schedule(data->bh); 507dec7d421SStefan Hajnoczi } 508c55a832fSFam Zheng 509c55a832fSFam Zheng BlockJobTxn *block_job_txn_new(void) 510c55a832fSFam Zheng { 511c55a832fSFam Zheng BlockJobTxn *txn = g_new0(BlockJobTxn, 1); 512c55a832fSFam Zheng QLIST_INIT(&txn->jobs); 513c55a832fSFam Zheng txn->refcnt = 1; 514c55a832fSFam Zheng return txn; 515c55a832fSFam Zheng } 516c55a832fSFam Zheng 517c55a832fSFam Zheng static void block_job_txn_ref(BlockJobTxn *txn) 518c55a832fSFam Zheng { 519c55a832fSFam Zheng txn->refcnt++; 520c55a832fSFam Zheng } 521c55a832fSFam Zheng 522c55a832fSFam Zheng void block_job_txn_unref(BlockJobTxn *txn) 523c55a832fSFam Zheng { 524c55a832fSFam Zheng if (txn && --txn->refcnt == 0) { 525c55a832fSFam Zheng g_free(txn); 526c55a832fSFam Zheng } 527c55a832fSFam Zheng } 528c55a832fSFam Zheng 529c55a832fSFam Zheng void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job) 530c55a832fSFam Zheng { 531c55a832fSFam Zheng if (!txn) { 532c55a832fSFam Zheng return; 533c55a832fSFam Zheng } 534c55a832fSFam Zheng 535c55a832fSFam Zheng assert(!job->txn); 536c55a832fSFam Zheng job->txn = txn; 537c55a832fSFam Zheng 538c55a832fSFam Zheng QLIST_INSERT_HEAD(&txn->jobs, job, txn_list); 539c55a832fSFam Zheng block_job_txn_ref(txn); 540c55a832fSFam Zheng } 541