usr/src/common/mdesc/mdesc_getpropval.c

   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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29
  30 #include <sys/types.h>
  31 #ifdef _KERNEL
  32 #include <sys/systm.h>
  33 #else
  34 #include <strings.h>
  35 #endif
  36
  37 #include <sys/mdesc.h>
  38 #include <sys/mdesc_impl.h>
  39
  40 int
  41 md_get_prop_val(md_t *ptr, mde_cookie_t node, char *namep, uint64_t *valp)
  42 {
  43         mde_str_cookie_t prop_name;
  44         md_impl_t       *mdp;
  45         mde_cookie_t    elem;
  46
  47         mdp = (md_impl_t *)ptr;
  48
  49         if (node == MDE_INVAL_ELEM_COOKIE) {
  50                 return (-1);
  51         }
  52
  53         prop_name = md_find_name(ptr, namep);
  54         if (prop_name == MDE_INVAL_STR_COOKIE) {
  55                 return (-1);
  56         }
  57
  58         elem = md_find_node_prop(mdp, node, prop_name, MDET_PROP_VAL);
  59
  60         if (elem != MDE_INVAL_ELEM_COOKIE) {
  61                 md_element_t *mdep;
  62                 mdep = &(mdp->mdep[(int)elem]);
  63
  64                 *valp = MDE_PROP_VALUE(mdep);
  65                 return (0);
  66         }
  67
  68         return (-1);    /* no such property name */
  69 }