/*
 * 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.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <limits.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <topo_error.h>
#include <topo_tree.h>
#include <topo_subr.h>
#include <topo_file.h>

/*
 * topo_file.c
 *
 *	This file hides the details of any file manipulation to
 *	establish topology for a given enumerator.
 */

#define	TOPO_DEFAULT_FILE	"maps/%s-%s-topology.xml"
#define	TOPO_COMMON_FILE	"maps/%s-topology.xml"

static void
topo_file_unload(topo_file_t *tfp)
{

	if (tfp == NULL)
		return;

	if (tfp->tf_filenm != NULL)
		topo_mod_strfree(tfp->tf_mod, tfp->tf_filenm);

	if (tfp->tf_tmap != NULL)
		tf_info_free(tfp->tf_mod, tfp->tf_tmap);

	topo_mod_free(tfp->tf_mod, tfp, sizeof (topo_file_t));
}

int
topo_file_load(topo_mod_t *mod, tnode_t *node, const char *name,
    const char *scheme)
{
	topo_file_t *tfp;
	char fp[MAXNAMELEN];

	if ((tfp = topo_mod_zalloc(mod, sizeof (topo_file_t))) == NULL)
		return (topo_mod_seterrno(mod, ETOPO_NOMEM));

	tfp->tf_mod = mod;

	if (name != NULL)
		(void) snprintf(fp, MAXNAMELEN, TOPO_DEFAULT_FILE, name,
		    scheme);
	else
		(void) snprintf(fp, MAXNAMELEN, TOPO_COMMON_FILE, scheme);

	if ((tfp->tf_filenm = topo_search_path(mod, mod->tm_rootdir, fp))
	    == NULL) {
		topo_file_unload(tfp);
		return (topo_mod_seterrno(mod, ETOPO_MOD_NOENT));
	}

	if ((tfp->tf_tmap = topo_xml_read(mod, tfp->tf_filenm, scheme))
	    == NULL) {
		topo_dprintf(mod->tm_hdl, TOPO_DBG_ERR,
		    "failed to load topology file %s: "
		    "%s\n", tfp->tf_filenm, topo_strerror(ETOPO_MOD_XRD));
		topo_file_unload(tfp);
		return (topo_mod_seterrno(mod, ETOPO_MOD_XRD));
	}

	if (topo_xml_enum(mod, tfp->tf_tmap, node) < 0) {
		topo_dprintf(mod->tm_hdl, TOPO_DBG_ERR,
		    "Failed to enumerate topology: %s\n",
		    topo_strerror(ETOPO_MOD_XENUM));
		topo_file_unload(tfp);
		return (topo_mod_seterrno(mod, ETOPO_MOD_XENUM));
	}

	topo_file_unload(tfp);

	return (0);
}