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-rw-r--r--block/create.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/block/create.c b/block/create.c
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+++ b/block/create.c
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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;
+
+ 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);
+}