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