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);
+}