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 262f0c9fe6SPaolo Bonzini #include "config-host.h" 272f0c9fe6SPaolo Bonzini #include "qemu-common.h" 282f0c9fe6SPaolo Bonzini #include "trace.h" 292f0c9fe6SPaolo Bonzini #include "monitor.h" 302f0c9fe6SPaolo Bonzini #include "block.h" 312f0c9fe6SPaolo Bonzini #include "blockjob.h" 322f0c9fe6SPaolo Bonzini #include "block_int.h" 332f0c9fe6SPaolo Bonzini #include "qjson.h" 342f0c9fe6SPaolo Bonzini #include "qemu-coroutine.h" 352f0c9fe6SPaolo Bonzini #include "qmp-commands.h" 362f0c9fe6SPaolo Bonzini #include "qemu-timer.h" 372f0c9fe6SPaolo Bonzini 382f0c9fe6SPaolo Bonzini void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs, 392f0c9fe6SPaolo Bonzini int64_t speed, BlockDriverCompletionFunc *cb, 402f0c9fe6SPaolo Bonzini void *opaque, Error **errp) 412f0c9fe6SPaolo Bonzini { 422f0c9fe6SPaolo Bonzini BlockJob *job; 432f0c9fe6SPaolo Bonzini 442f0c9fe6SPaolo Bonzini if (bs->job || bdrv_in_use(bs)) { 452f0c9fe6SPaolo Bonzini error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 462f0c9fe6SPaolo Bonzini return NULL; 472f0c9fe6SPaolo Bonzini } 482f0c9fe6SPaolo Bonzini bdrv_set_in_use(bs, 1); 492f0c9fe6SPaolo Bonzini 502f0c9fe6SPaolo Bonzini job = g_malloc0(job_type->instance_size); 512f0c9fe6SPaolo Bonzini job->job_type = job_type; 522f0c9fe6SPaolo Bonzini job->bs = bs; 532f0c9fe6SPaolo Bonzini job->cb = cb; 542f0c9fe6SPaolo Bonzini job->opaque = opaque; 552f0c9fe6SPaolo Bonzini job->busy = true; 562f0c9fe6SPaolo Bonzini bs->job = job; 572f0c9fe6SPaolo Bonzini 582f0c9fe6SPaolo Bonzini /* Only set speed when necessary to avoid NotSupported error */ 592f0c9fe6SPaolo Bonzini if (speed != 0) { 602f0c9fe6SPaolo Bonzini Error *local_err = NULL; 612f0c9fe6SPaolo Bonzini 622f0c9fe6SPaolo Bonzini block_job_set_speed(job, speed, &local_err); 632f0c9fe6SPaolo Bonzini if (error_is_set(&local_err)) { 642f0c9fe6SPaolo Bonzini bs->job = NULL; 652f0c9fe6SPaolo Bonzini g_free(job); 662f0c9fe6SPaolo Bonzini bdrv_set_in_use(bs, 0); 672f0c9fe6SPaolo Bonzini error_propagate(errp, local_err); 682f0c9fe6SPaolo Bonzini return NULL; 692f0c9fe6SPaolo Bonzini } 702f0c9fe6SPaolo Bonzini } 712f0c9fe6SPaolo Bonzini return job; 722f0c9fe6SPaolo Bonzini } 732f0c9fe6SPaolo Bonzini 742f0c9fe6SPaolo Bonzini void block_job_complete(BlockJob *job, int ret) 752f0c9fe6SPaolo Bonzini { 762f0c9fe6SPaolo Bonzini BlockDriverState *bs = job->bs; 772f0c9fe6SPaolo Bonzini 782f0c9fe6SPaolo Bonzini assert(bs->job == job); 792f0c9fe6SPaolo Bonzini job->cb(job->opaque, ret); 802f0c9fe6SPaolo Bonzini bs->job = NULL; 812f0c9fe6SPaolo Bonzini g_free(job); 822f0c9fe6SPaolo Bonzini bdrv_set_in_use(bs, 0); 832f0c9fe6SPaolo Bonzini } 842f0c9fe6SPaolo Bonzini 852f0c9fe6SPaolo Bonzini void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) 862f0c9fe6SPaolo Bonzini { 872f0c9fe6SPaolo Bonzini Error *local_err = NULL; 882f0c9fe6SPaolo Bonzini 892f0c9fe6SPaolo Bonzini if (!job->job_type->set_speed) { 902f0c9fe6SPaolo Bonzini error_set(errp, QERR_NOT_SUPPORTED); 912f0c9fe6SPaolo Bonzini return; 922f0c9fe6SPaolo Bonzini } 932f0c9fe6SPaolo Bonzini job->job_type->set_speed(job, speed, &local_err); 942f0c9fe6SPaolo Bonzini if (error_is_set(&local_err)) { 952f0c9fe6SPaolo Bonzini error_propagate(errp, local_err); 962f0c9fe6SPaolo Bonzini return; 972f0c9fe6SPaolo Bonzini } 982f0c9fe6SPaolo Bonzini 992f0c9fe6SPaolo Bonzini job->speed = speed; 1002f0c9fe6SPaolo Bonzini } 1012f0c9fe6SPaolo Bonzini 1022f0c9fe6SPaolo Bonzini void block_job_cancel(BlockJob *job) 1032f0c9fe6SPaolo Bonzini { 1042f0c9fe6SPaolo Bonzini job->cancelled = true; 1052f0c9fe6SPaolo Bonzini if (job->co && !job->busy) { 1062f0c9fe6SPaolo Bonzini qemu_coroutine_enter(job->co, NULL); 1072f0c9fe6SPaolo Bonzini } 1082f0c9fe6SPaolo Bonzini } 1092f0c9fe6SPaolo Bonzini 1102f0c9fe6SPaolo Bonzini bool block_job_is_cancelled(BlockJob *job) 1112f0c9fe6SPaolo Bonzini { 1122f0c9fe6SPaolo Bonzini return job->cancelled; 1132f0c9fe6SPaolo Bonzini } 1142f0c9fe6SPaolo Bonzini 1152f0c9fe6SPaolo Bonzini struct BlockCancelData { 1162f0c9fe6SPaolo Bonzini BlockJob *job; 1172f0c9fe6SPaolo Bonzini BlockDriverCompletionFunc *cb; 1182f0c9fe6SPaolo Bonzini void *opaque; 1192f0c9fe6SPaolo Bonzini bool cancelled; 1202f0c9fe6SPaolo Bonzini int ret; 1212f0c9fe6SPaolo Bonzini }; 1222f0c9fe6SPaolo Bonzini 1232f0c9fe6SPaolo Bonzini static void block_job_cancel_cb(void *opaque, int ret) 1242f0c9fe6SPaolo Bonzini { 1252f0c9fe6SPaolo Bonzini struct BlockCancelData *data = opaque; 1262f0c9fe6SPaolo Bonzini 1272f0c9fe6SPaolo Bonzini data->cancelled = block_job_is_cancelled(data->job); 1282f0c9fe6SPaolo Bonzini data->ret = ret; 1292f0c9fe6SPaolo Bonzini data->cb(data->opaque, ret); 1302f0c9fe6SPaolo Bonzini } 1312f0c9fe6SPaolo Bonzini 1322f0c9fe6SPaolo Bonzini int block_job_cancel_sync(BlockJob *job) 1332f0c9fe6SPaolo Bonzini { 1342f0c9fe6SPaolo Bonzini struct BlockCancelData data; 1352f0c9fe6SPaolo Bonzini BlockDriverState *bs = job->bs; 1362f0c9fe6SPaolo Bonzini 1372f0c9fe6SPaolo Bonzini assert(bs->job == job); 1382f0c9fe6SPaolo Bonzini 1392f0c9fe6SPaolo Bonzini /* Set up our own callback to store the result and chain to 1402f0c9fe6SPaolo Bonzini * the original callback. 1412f0c9fe6SPaolo Bonzini */ 1422f0c9fe6SPaolo Bonzini data.job = job; 1432f0c9fe6SPaolo Bonzini data.cb = job->cb; 1442f0c9fe6SPaolo Bonzini data.opaque = job->opaque; 1452f0c9fe6SPaolo Bonzini data.ret = -EINPROGRESS; 1462f0c9fe6SPaolo Bonzini job->cb = block_job_cancel_cb; 1472f0c9fe6SPaolo Bonzini job->opaque = &data; 1482f0c9fe6SPaolo Bonzini block_job_cancel(job); 1492f0c9fe6SPaolo Bonzini while (data.ret == -EINPROGRESS) { 1502f0c9fe6SPaolo Bonzini qemu_aio_wait(); 1512f0c9fe6SPaolo Bonzini } 1522f0c9fe6SPaolo Bonzini return (data.cancelled && data.ret == 0) ? -ECANCELED : data.ret; 1532f0c9fe6SPaolo Bonzini } 1542f0c9fe6SPaolo Bonzini 1552f0c9fe6SPaolo Bonzini void block_job_sleep_ns(BlockJob *job, QEMUClock *clock, int64_t ns) 1562f0c9fe6SPaolo Bonzini { 1572f0c9fe6SPaolo Bonzini /* Check cancellation *before* setting busy = false, too! */ 1582f0c9fe6SPaolo Bonzini if (!block_job_is_cancelled(job)) { 1592f0c9fe6SPaolo Bonzini job->busy = false; 1602f0c9fe6SPaolo Bonzini co_sleep_ns(clock, ns); 1612f0c9fe6SPaolo Bonzini job->busy = true; 1622f0c9fe6SPaolo Bonzini } 1632f0c9fe6SPaolo Bonzini } 164*30e628b7SPaolo Bonzini 165*30e628b7SPaolo Bonzini BlockJobInfo *block_job_query(BlockJob *job) 166*30e628b7SPaolo Bonzini { 167*30e628b7SPaolo Bonzini BlockJobInfo *info = g_new0(BlockJobInfo, 1); 168*30e628b7SPaolo Bonzini info->type = g_strdup(job->job_type->job_type); 169*30e628b7SPaolo Bonzini info->device = g_strdup(bdrv_get_device_name(job->bs)); 170*30e628b7SPaolo Bonzini info->len = job->len; 171*30e628b7SPaolo Bonzini info->offset = job->offset; 172*30e628b7SPaolo Bonzini info->speed = job->speed; 173*30e628b7SPaolo Bonzini return info; 174*30e628b7SPaolo Bonzini } 175