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/*
* Block layer code related to image creation
*
* Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com>
*
* 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_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 BlockdevCreateJob {
Job common;
BlockDriver *drv;
BlockdevCreateOptions *opts;
} BlockdevCreateJob;
static int coroutine_fn blockdev_create_run(Job *job, Error **errp)
{
BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
int ret;
GLOBAL_STATE_CODE();
GRAPH_RDLOCK_GUARD();
job_progress_set_remaining(&s->common, 1);
ret = s->drv->bdrv_co_create(s->opts, errp);
job_progress_update(&s->common, 1);
qapi_free_BlockdevCreateOptions(s->opts);
return ret;
}
static const JobDriver blockdev_create_job_driver = {
.instance_size = sizeof(BlockdevCreateJob),
.job_type = JOB_TYPE_CREATE,
.run = blockdev_create_run,
};
/* Checking whether the function is present doesn't require the graph lock */
static inline bool TSA_NO_TSA has_bdrv_co_create(BlockDriver *drv)
{
return drv->bdrv_co_create;
}
void qmp_blockdev_create(const char *job_id, BlockdevCreateOptions *options,
Error **errp)
{
BlockdevCreateJob *s;
const char *fmt = BlockdevDriver_str(options->driver);
BlockDriver *drv = bdrv_find_format(fmt);
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;
}
/* Error out if the driver doesn't support .bdrv_co_create */
if (!has_bdrv_co_create(drv)) {
error_setg(errp, "Driver does not support blockdev-create");
return;
}
/* Create the block job */
/* TODO Running in the main context. Block drivers need to error out or add
* locking when they use a BDS in a different AioContext. */
s = job_create(job_id, &blockdev_create_job_driver, NULL,
qemu_get_aio_context(), JOB_DEFAULT | JOB_MANUAL_DISMISS,
NULL, NULL, errp);
if (!s) {
return;
}
s->drv = drv,
s->opts = QAPI_CLONE(BlockdevCreateOptions, options),
job_start(&s->common);
}
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