xref: /illumos-gate/usr/src/common/mdesc/mdesc_getpropval.c (revision d48be21240dfd051b689384ce2b23479d757f2d8)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <sys/types.h>
28 #ifdef _KERNEL
29 #include <sys/systm.h>
30 #else
31 #include <strings.h>
32 #endif
33 
34 #include <sys/mdesc.h>
35 #include <sys/mdesc_impl.h>
36 
37 int
38 md_get_prop_val(md_t *ptr, mde_cookie_t node, char *namep, uint64_t *valp)
39 {
40 	mde_str_cookie_t prop_name;
41 	md_impl_t	*mdp;
42 	mde_cookie_t	elem;
43 
44 	mdp = (md_impl_t *)ptr;
45 
46 	if (node == MDE_INVAL_ELEM_COOKIE) {
47 		return (-1);
48 	}
49 
50 	prop_name = md_find_name(ptr, namep);
51 	if (prop_name == MDE_INVAL_STR_COOKIE) {
52 		return (-1);
53 	}
54 
55 	elem = md_find_node_prop(mdp, node, prop_name, MDET_PROP_VAL);
56 
57 	if (elem != MDE_INVAL_ELEM_COOKIE) {
58 		md_element_t *mdep;
59 		mdep = &(mdp->mdep[(int)elem]);
60 
61 		*valp = MDE_PROP_VALUE(mdep);
62 		return (0);
63 	}
64 
65 	return (-1);	/* no such property name */
66 }
67