diff options
Diffstat (limited to 'block/create.c')
-rw-r--r-- | block/create.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/block/create.c b/block/create.c new file mode 100644 index 000000000..89812669d --- /dev/null +++ b/block/create.c @@ -0,0 +1,99 @@ +/* + * 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; + + 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, +}; + +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 (!drv->bdrv_co_create) { + 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); +} |