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/*-
 *   BSD LICENSE
 * 
 *   Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
 *   All rights reserved.
 * 
 *   Redistribution and use in source and binary forms, with or without 
 *   modification, are permitted provided that the following conditions 
 *   are met:
 * 
 *     * Redistributions of source code must retain the above copyright 
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in 
 *       the documentation and/or other materials provided with the 
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its 
 *       contributors may be used to endorse or promote products derived 
 *       from this software without specific prior written permission.
 * 
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 *  version: DPDK.L.1.2.3-3
 */

/**
 * @file
 * Paths used for storing hugepage and config info for multi-process support.
 */

#ifndef _EAL_LINUXAPP_FS_PATHS_H
#define _EAL_LINUXAPP_FS_PATHS_H

/** Path of rte config file. */
#define RUNTIME_CONFIG_FMT "%s/.%s_config"

static const char *default_config_dir = "/var/run";

static inline const char *
eal_runtime_config_path(void)
{
	static char buffer[PATH_MAX]; /* static so auto-zeroed */
	const char *directory = default_config_dir;
	const char *home_dir = getenv("HOME");

	if (getuid() != 0 && home_dir != NULL)
		directory = home_dir;
	rte_snprintf(buffer, sizeof(buffer) - 1, RUNTIME_CONFIG_FMT, directory,
			internal_config.hugefile_prefix);
	return buffer;
}

/** Path of hugepage info file. */
#define HUGEPAGE_INFO_FMT "%s/.%s_hugepage_info"

static inline const char *
eal_hugepage_info_path(void)
{
	static char buffer[PATH_MAX]; /* static so auto-zeroed */
	const char *directory = default_config_dir;
	const char *home_dir = getenv("HOME");

	if (getuid() != 0 && home_dir != NULL)
		directory = home_dir;
	rte_snprintf(buffer, sizeof(buffer) - 1, HUGEPAGE_INFO_FMT, directory,
			internal_config.hugefile_prefix);
	return buffer;
}

/** String format for hugepage map files. */
#define HUGEFILE_FMT "%s/%smap_%d"

static inline const char *
eal_get_hugefile_path(char *buffer, size_t buflen, const char *hugedir, int f_id)
{
	rte_snprintf(buffer, buflen, HUGEFILE_FMT, hugedir,
			internal_config.hugefile_prefix, f_id);
	buffer[buflen - 1] = '\0';
	return buffer;
}

/** define the default filename prefix for the %s values above */
#define HUGEFILE_PREFIX_DEFAULT "rte"


#endif /* _EAL_LINUXAPP_FS_PATHS_H */