1 /* 2 * Block layer code related to image creation 3 * 4 * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "block/block_int.h" 27 #include "qemu/job.h" 28 #include "qemu/main-loop.h" 29 #include "qapi/qapi-commands-block-core.h" 30 #include "qapi/qapi-visit-block-core.h" 31 #include "qapi/clone-visitor.h" 32 #include "qapi/error.h" 33 34 typedef struct BlockdevCreateJob { 35 Job common; 36 BlockDriver *drv; 37 BlockdevCreateOptions *opts; 38 } BlockdevCreateJob; 39 40 static int coroutine_fn blockdev_create_run(Job *job, Error **errp) 41 { 42 BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common); 43 int ret; 44 45 job_progress_set_remaining(&s->common, 1); 46 ret = s->drv->bdrv_co_create(s->opts, errp); 47 job_progress_update(&s->common, 1); 48 49 qapi_free_BlockdevCreateOptions(s->opts); 50 51 return ret; 52 } 53 54 static const JobDriver blockdev_create_job_driver = { 55 .instance_size = sizeof(BlockdevCreateJob), 56 .job_type = JOB_TYPE_CREATE, 57 .run = blockdev_create_run, 58 }; 59 60 void qmp_blockdev_create(const char *job_id, BlockdevCreateOptions *options, 61 Error **errp) 62 { 63 BlockdevCreateJob *s; 64 const char *fmt = BlockdevDriver_str(options->driver); 65 BlockDriver *drv = bdrv_find_format(fmt); 66 67 if (!drv) { 68 error_setg(errp, "Block driver '%s' not found or not supported", fmt); 69 return; 70 } 71 72 /* If the driver is in the schema, we know that it exists. But it may not 73 * be whitelisted. */ 74 if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { 75 error_setg(errp, "Driver is not whitelisted"); 76 return; 77 } 78 79 /* Error out if the driver doesn't support .bdrv_co_create */ 80 if (!drv->bdrv_co_create) { 81 error_setg(errp, "Driver does not support blockdev-create"); 82 return; 83 } 84 85 /* Create the block job */ 86 /* TODO Running in the main context. Block drivers need to error out or add 87 * locking when they use a BDS in a different AioContext. */ 88 s = job_create(job_id, &blockdev_create_job_driver, NULL, 89 qemu_get_aio_context(), JOB_DEFAULT | JOB_MANUAL_DISMISS, 90 NULL, NULL, errp); 91 if (!s) { 92 return; 93 } 94 95 s->drv = drv, 96 s->opts = QAPI_CLONE(BlockdevCreateOptions, options), 97 98 job_start(&s->common); 99 } 100