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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 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.
*/
/**
* @file
* Stores functions and path defines for files and directories
* on the filesystem for Linux, that are used by the Linux EAL.
*/
#ifndef EAL_FILESYSTEM_H
#define EAL_FILESYSTEM_H
/** Path of rte config file. */
#define RUNTIME_CONFIG_FMT "%s/.%s_config"
#include <stdint.h>
#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <rte_string_fns.h>
#include "eal_internal_cfg.h"
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;
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;
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"
#define TEMP_HUGEFILE_FMT "%s/%smap_temp_%d"
static inline const char *
eal_get_hugefile_path(char *buffer, size_t buflen, const char *hugedir, int f_id)
{
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"
/** Function to read a single numeric value from a file on the filesystem.
* Used to read information from files on /sys */
int eal_parse_sysfs_value(const char *filename, unsigned long *val);
#endif /* EAL_FILESYSTEM_H */
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