usr/src/lib/fm/topo/libtopo/common/topo_file.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 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 #include <limits.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <sys/param.h>
  33 #include <topo_error.h>
  34 #include <topo_tree.h>
  35 #include <topo_subr.h>
  36 #include <topo_file.h>
  37
  38 /*
  39  * topo_file.c
  40  *
  41  *      This file hides the details of any file manipulation to
  42  *      establish topology for a given enumerator.
  43  */
  44
  45 #define TOPO_DEFAULT_FILE       "maps/%s-%s-topology.xml"
  46 #define TOPO_COMMON_FILE        "maps/%s-topology.xml"
  47
  48 static void
  49 topo_file_unload(topo_file_t *tfp)
  50 {
  51
  52         if (tfp == NULL)
  53                 return;
  54
  55         if (tfp->tf_filenm != NULL)
  56                 topo_mod_strfree(tfp->tf_mod, tfp->tf_filenm);
  57
  58         if (tfp->tf_tmap != NULL)
  59                 tf_info_free(tfp->tf_mod, tfp->tf_tmap);
  60
  61         topo_mod_free(tfp->tf_mod, tfp, sizeof (topo_file_t));
  62 }
  63
  64 int
  65 topo_file_load(topo_mod_t *mod, tnode_t *node, const char *name,
  66     const char *scheme, int pmap)
  67 {
  68         topo_file_t *tfp;
  69         char fp[MAXNAMELEN];
  70
  71         if ((tfp = topo_mod_zalloc(mod, sizeof (topo_file_t))) == NULL)
  72                 return (topo_mod_seterrno(mod, ETOPO_NOMEM));
  73
  74         tfp->tf_mod = mod;
  75
  76         if (name != NULL)
  77                 (void) snprintf(fp, MAXNAMELEN, TOPO_DEFAULT_FILE, name,
  78                     scheme);
  79         else
  80                 (void) snprintf(fp, MAXNAMELEN, TOPO_COMMON_FILE, scheme);
  81
  82         if ((tfp->tf_filenm = topo_search_path(mod, mod->tm_rootdir, fp))
  83             == NULL) {
  84                 topo_file_unload(tfp);
  85                 return (topo_mod_seterrno(mod, ETOPO_MOD_NOENT));
  86         }
  87
  88         if ((tfp->tf_tmap = topo_xml_read(mod, tfp->tf_filenm, scheme))
  89             == NULL) {
  90                 topo_dprintf(mod->tm_hdl, TOPO_DBG_ERR,
  91                     "failed to load topology file %s: "
  92                     "%s\n", tfp->tf_filenm, topo_strerror(ETOPO_MOD_XRD));
  93                 topo_file_unload(tfp);
  94                 return (topo_mod_seterrno(mod, ETOPO_MOD_XRD));
  95         }
  96
  97         if (pmap)
  98                 tfp->tf_tmap->tf_flags |= TF_PROPMAP;
  99
 100         if (topo_xml_enum(mod, tfp->tf_tmap, node) < 0) {
 101                 topo_dprintf(mod->tm_hdl, TOPO_DBG_ERR,
 102                     "Failed to enumerate topology: %s\n",
 103                     topo_strerror(ETOPO_MOD_XENUM));
 104                 topo_file_unload(tfp);
 105                 return (topo_mod_seterrno(mod, ETOPO_MOD_XENUM));
 106         }
 107
 108         topo_file_unload(tfp);
 109
 110         return (0);
 111 }