4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * Stores functions and path defines for files and directories
37 * on the filesystem for Linux, that are used by the Linux EAL.
40 #ifndef EAL_FILESYSTEM_H
41 #define EAL_FILESYSTEM_H
43 /** Path of rte config file. */
44 #define RUNTIME_CONFIG_FMT "%s/.%s_config"
51 #include <rte_string_fns.h>
52 #include "eal_internal_cfg.h"
54 static const char *default_config_dir = "/var/run";
56 static inline const char *
57 eal_runtime_config_path(void)
59 static char buffer[PATH_MAX]; /* static so auto-zeroed */
60 const char *directory = default_config_dir;
61 const char *home_dir = getenv("HOME");
63 if (getuid() != 0 && home_dir != NULL)
65 snprintf(buffer, sizeof(buffer) - 1, RUNTIME_CONFIG_FMT, directory,
66 internal_config.hugefile_prefix);
70 /** Path of hugepage info file. */
71 #define HUGEPAGE_INFO_FMT "%s/.%s_hugepage_info"
73 static inline const char *
74 eal_hugepage_info_path(void)
76 static char buffer[PATH_MAX]; /* static so auto-zeroed */
77 const char *directory = default_config_dir;
78 const char *home_dir = getenv("HOME");
80 if (getuid() != 0 && home_dir != NULL)
82 snprintf(buffer, sizeof(buffer) - 1, HUGEPAGE_INFO_FMT, directory,
83 internal_config.hugefile_prefix);
87 /** String format for hugepage map files. */
88 #define HUGEFILE_FMT "%s/%smap_%d"
89 #define TEMP_HUGEFILE_FMT "%s/%smap_temp_%d"
91 static inline const char *
92 eal_get_hugefile_path(char *buffer, size_t buflen, const char *hugedir, int f_id)
94 snprintf(buffer, buflen, HUGEFILE_FMT, hugedir,
95 internal_config.hugefile_prefix, f_id);
96 buffer[buflen - 1] = '\0';
100 /** define the default filename prefix for the %s values above */
101 #define HUGEFILE_PREFIX_DEFAULT "rte"
103 /** Function to read a single numeric value from a file on the filesystem.
104 * Used to read information from files on /sys */
105 int eal_parse_sysfs_value(const char *filename, unsigned long *val);
107 #endif /* EAL_FILESYSTEM_H */