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f67432a201
Presently we codify the entry point for a job as the "start" callback, but a more apt name would be "run" to clarify the idea that when this function returns we consider the job to have "finished," except for any cleanup which occurs in separate callbacks later. As part of this clarification, change the signature to include an error object and a return code. The error ptr is not yet used, and the return code while captured, will be overwritten by actions in the job_completed function. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20180830015734.19765-2-jsnow@redhat.com Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
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* Block layer code related to image creation
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*
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* Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com>
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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 "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 BlockdevCreateJob {
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Job common;
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BlockDriver *drv;
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BlockdevCreateOptions *opts;
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int ret;
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Error *err;
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} BlockdevCreateJob;
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static void blockdev_create_complete(Job *job, void *opaque)
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{
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BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
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job_completed(job, s->ret, s->err);
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}
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static int coroutine_fn blockdev_create_run(Job *job, Error **errp)
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{
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BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
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job_progress_set_remaining(&s->common, 1);
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s->ret = s->drv->bdrv_co_create(s->opts, &s->err);
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job_progress_update(&s->common, 1);
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qapi_free_BlockdevCreateOptions(s->opts);
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job_defer_to_main_loop(&s->common, blockdev_create_complete, NULL);
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return s->ret;
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}
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static const JobDriver blockdev_create_job_driver = {
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.instance_size = sizeof(BlockdevCreateJob),
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.job_type = JOB_TYPE_CREATE,
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.run = blockdev_create_run,
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};
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void qmp_blockdev_create(const char *job_id, BlockdevCreateOptions *options,
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Error **errp)
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{
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BlockdevCreateJob *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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/* 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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assert(drv);
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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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/* Error out if the driver doesn't support .bdrv_co_create */
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if (!drv->bdrv_co_create) {
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error_setg(errp, "Driver does not support blockdev-create");
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return;
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}
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/* Create the block job */
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/* TODO Running in the main context. Block drivers need to error out or add
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* locking when they use a BDS in a different AioContext. */
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s = job_create(job_id, &blockdev_create_job_driver, NULL,
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qemu_get_aio_context(), 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->drv = drv,
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s->opts = QAPI_CLONE(BlockdevCreateOptions, options),
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job_start(&s->common);
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}
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