xref: /illumos-gate/usr/src/common/mdesc/mdesc_rootnode.c (revision c40a6cd7)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/mdesc.h>
#include <sys/mdesc_impl.h>

mde_cookie_t
md_root_node(md_t *ptr)
{
	md_impl_t *mdp;

	mdp = (md_impl_t *)ptr;

	if (mdp->md_magic != LIBMD_MAGIC)
		return (MDE_INVAL_ELEM_COOKIE);

	return (mdp->root_node);
}