* empty set of options. The reference to the QDict belongs to the block layer
* after the call (even on failure), so if the caller intends to reuse the
* dictionary, it needs to use qobject_ref() before calling bdrv_open.
+ *
+ * The caller holds the AioContext lock for @bs. It must make sure that @bs
+ * stays in the same AioContext, i.e. @options must not refer to nodes in a
+ * different AioContext.
*/
BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *options,
int flags, Error **errp)
{
ERRP_GUARD();
int ret;
+ AioContext *ctx = bdrv_get_aio_context(bs);
BlockDriverState *new_node_bs = NULL;
const char *drvname, *node_name;
BlockDriver *drv;
GLOBAL_STATE_CODE();
+ aio_context_release(ctx);
+ aio_context_acquire(qemu_get_aio_context());
new_node_bs = bdrv_new_open_driver_opts(drv, node_name, options, flags,
errp);
+ aio_context_release(qemu_get_aio_context());
+ aio_context_acquire(ctx);
+ assert(bdrv_get_aio_context(bs) == ctx);
+
options = NULL; /* bdrv_new_open_driver() eats options */
if (!new_node_bs) {
error_prepend(errp, "Could not create node: ");