1 /* 2 * Block layer code related to image options amend 3 * 4 * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com> 5 * Copyright (c) 2020 Red Hat. Inc 6 * 7 * Heavily based on create.c 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to deal 11 * in the Software without restriction, including without limitation the rights 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 13 * copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 25 * THE SOFTWARE. 26 */ 27 28 #include "qemu/osdep.h" 29 #include "block/block_int.h" 30 #include "qemu/job.h" 31 #include "qemu/main-loop.h" 32 #include "qapi/qapi-commands-block-core.h" 33 #include "qapi/qapi-visit-block-core.h" 34 #include "qapi/clone-visitor.h" 35 #include "qapi/error.h" 36 37 typedef struct BlockdevAmendJob { 38 Job common; 39 BlockdevAmendOptions *opts; 40 BlockDriverState *bs; 41 bool force; 42 } BlockdevAmendJob; 43 44 static int coroutine_fn blockdev_amend_run(Job *job, Error **errp) 45 { 46 BlockdevAmendJob *s = container_of(job, BlockdevAmendJob, common); 47 int ret; 48 49 job_progress_set_remaining(&s->common, 1); 50 ret = s->bs->drv->bdrv_co_amend(s->bs, s->opts, s->force, errp); 51 job_progress_update(&s->common, 1); 52 qapi_free_BlockdevAmendOptions(s->opts); 53 return ret; 54 } 55 56 static const JobDriver blockdev_amend_job_driver = { 57 .instance_size = sizeof(BlockdevAmendJob), 58 .job_type = JOB_TYPE_AMEND, 59 .run = blockdev_amend_run, 60 }; 61 62 void qmp_x_blockdev_amend(const char *job_id, 63 const char *node_name, 64 BlockdevAmendOptions *options, 65 bool has_force, 66 bool force, 67 Error **errp) 68 { 69 BlockdevAmendJob *s; 70 const char *fmt = BlockdevDriver_str(options->driver); 71 BlockDriver *drv = bdrv_find_format(fmt); 72 BlockDriverState *bs; 73 74 bs = bdrv_lookup_bs(NULL, node_name, errp); 75 if (!bs) { 76 return; 77 } 78 79 if (!drv) { 80 error_setg(errp, "Block driver '%s' not found or not supported", fmt); 81 return; 82 } 83 84 /* 85 * If the driver is in the schema, we know that it exists. But it may not 86 * be whitelisted. 87 */ 88 if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { 89 error_setg(errp, "Driver is not whitelisted"); 90 return; 91 } 92 93 if (bs->drv != drv) { 94 error_setg(errp, 95 "x-blockdev-amend doesn't support changing the block driver"); 96 return; 97 } 98 99 /* Error out if the driver doesn't support .bdrv_co_amend */ 100 if (!drv->bdrv_co_amend) { 101 error_setg(errp, "Driver does not support x-blockdev-amend"); 102 return; 103 } 104 105 /* Create the block job */ 106 s = job_create(job_id, &blockdev_amend_job_driver, NULL, 107 bdrv_get_aio_context(bs), JOB_DEFAULT | JOB_MANUAL_DISMISS, 108 NULL, NULL, errp); 109 if (!s) { 110 return; 111 } 112 113 s->bs = bs, 114 s->opts = QAPI_CLONE(BlockdevAmendOptions, options), 115 s->force = has_force ? force : false; 116 job_start(&s->common); 117 } 118