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eb23654dbe
Utilize the job_exit shim by not calling job_defer_to_main_loop, and where applicable, converting the deferred callback into the job_exit callback. This converts backup, stream, create, and the unit tests all at once. Most of these jobs do not see any changes to the order in which they clean up their resources, except the test-blockjob-txn test, which now puts down its bs before job_completed is called. This is safe for the same reason the reordering in the mirror job is safe, because job_completed no longer runs under two locks, making the unref safe even if it causes a flush. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20180830015734.19765-7-jsnow@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
94 lines
3.2 KiB
C
94 lines
3.2 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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} BlockdevCreateJob;
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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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int ret;
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job_progress_set_remaining(&s->common, 1);
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ret = s->drv->bdrv_co_create(s->opts, errp);
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job_progress_update(&s->common, 1);
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qapi_free_BlockdevCreateOptions(s->opts);
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return 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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