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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
/**
* @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. */
#include <stdint.h>
#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <rte_string_fns.h>
#include "eal_internal_cfg.h"
/* sets up platform-specific runtime data dir */
int
eal_create_runtime_dir(void);
/* returns runtime dir */
const char *
eal_get_runtime_dir(void);
#define RUNTIME_CONFIG_FNAME "config"
static inline const char *
eal_runtime_config_path(void)
{
static char buffer[PATH_MAX]; /* static so auto-zeroed */
snprintf(buffer, sizeof(buffer) - 1, "%s/%s", eal_get_runtime_dir(),
RUNTIME_CONFIG_FNAME);
return buffer;
}
/** Path of primary/secondary communication unix socket file. */
#define MP_SOCKET_FNAME "mp_socket"
static inline const char *
eal_mp_socket_path(void)
{
static char buffer[PATH_MAX]; /* static so auto-zeroed */
snprintf(buffer, sizeof(buffer) - 1, "%s/%s", eal_get_runtime_dir(),
MP_SOCKET_FNAME);
return buffer;
}
#define FBARRAY_NAME_FMT "%s/fbarray_%s"
static inline const char *
eal_get_fbarray_path(char *buffer, size_t buflen, const char *name) {
snprintf(buffer, buflen, FBARRAY_NAME_FMT, eal_get_runtime_dir(), name);
return buffer;
}
/** Path of hugepage info file. */
#define HUGEPAGE_INFO_FNAME "hugepage_info"
static inline const char *
eal_hugepage_info_path(void)
{
static char buffer[PATH_MAX]; /* static so auto-zeroed */
snprintf(buffer, sizeof(buffer) - 1, "%s/%s", eal_get_runtime_dir(),
HUGEPAGE_INFO_FNAME);
return buffer;
}
/** Path of hugepage data file. */
#define HUGEPAGE_DATA_FNAME "hugepage_data"
static inline const char *
eal_hugepage_data_path(void)
{
static char buffer[PATH_MAX]; /* static so auto-zeroed */
snprintf(buffer, sizeof(buffer) - 1, "%s/%s", eal_get_runtime_dir(),
HUGEPAGE_DATA_FNAME);
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)
{
snprintf(buffer, buflen, HUGEFILE_FMT, hugedir,
internal_config.hugefile_prefix, f_id);
buffer[buflen - 1] = '\0';
return buffer;
}
/** String format for hugepage map lock files. */
#define HUGEFILE_LOCK_FMT "%s/map_%d.lock"
static inline const char *
eal_get_hugefile_lock_path(char *buffer, size_t buflen, int f_id)
{
snprintf(buffer, buflen, HUGEFILE_LOCK_FMT, eal_get_runtime_dir(),
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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