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      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 }
    112