/* * Block layer code related to image options amend * * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com> * Copyright (c) 2020 Red Hat. Inc * * Heavily based on create.c * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "block/block-io.h" #include "block/block_int.h" #include "qemu/job.h" #include "qemu/main-loop.h" #include "qapi/qapi-commands-block-core.h" #include "qapi/qapi-visit-block-core.h" #include "qapi/clone-visitor.h" #include "qapi/error.h" typedef struct BlockdevAmendJob { Job common; BlockdevAmendOptions *opts; BlockDriverState *bs; bool force; } BlockdevAmendJob; static int coroutine_fn blockdev_amend_run(Job *job, Error **errp) { BlockdevAmendJob *s = container_of(job, BlockdevAmendJob, common); int ret; job_progress_set_remaining(&s->common, 1); ret = s->bs->drv->bdrv_co_amend(s->bs, s->opts, s->force, errp); job_progress_update(&s->common, 1); qapi_free_BlockdevAmendOptions(s->opts); return ret; } static int blockdev_amend_pre_run(BlockdevAmendJob *s, Error **errp) { if (s->bs->drv->bdrv_amend_pre_run) { return s->bs->drv->bdrv_amend_pre_run(s->bs, errp); } return 0; } static void blockdev_amend_free(Job *job) { BlockdevAmendJob *s = container_of(job, BlockdevAmendJob, common); if (s->bs->drv->bdrv_amend_clean) { s->bs->drv->bdrv_amend_clean(s->bs); } bdrv_unref(s->bs); } static const JobDriver blockdev_amend_job_driver = { .instance_size = sizeof(BlockdevAmendJob), .job_type = JOB_TYPE_AMEND, .run = blockdev_amend_run, .free = blockdev_amend_free, }; void qmp_x_blockdev_amend(const char *job_id, const char *node_name, BlockdevAmendOptions *options, bool has_force, bool force, Error **errp) { BlockdevAmendJob *s; const char *fmt = BlockdevDriver_str(options->driver); BlockDriver *drv = bdrv_find_format(fmt); BlockDriverState *bs; bs = bdrv_lookup_bs(NULL, node_name, errp); if (!bs) { return; } if (!drv) { error_setg(errp, "Block driver '%s' not found or not supported", fmt); return; } /* * If the driver is in the schema, we know that it exists. But it may not * be whitelisted. */ if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { error_setg(errp, "Driver is not whitelisted"); return; } if (bs->drv != drv) { error_setg(errp, "x-blockdev-amend doesn't support changing the block driver"); return; } /* Error out if the driver doesn't support .bdrv_co_amend */ if (!drv->bdrv_co_amend) { error_setg(errp, "Driver does not support x-blockdev-amend"); return; } /* Create the block job */ s = job_create(job_id, &blockdev_amend_job_driver, NULL, bdrv_get_aio_context(bs), JOB_DEFAULT | JOB_MANUAL_DISMISS, NULL, NULL, errp); if (!s) { return; } bdrv_ref(bs); s->bs = bs, s->opts = QAPI_CLONE(BlockdevAmendOptions, options), s->force = has_force ? force : false; if (blockdev_amend_pre_run(s, errp)) { job_early_fail(&s->common); return; } job_start(&s->common); }