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annotate packages/fs/fat/current/src/fatfs.h @ 1476:f2453fae08d4

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Added support for FAT filesystem. Several packages, see the individual ChangeLogs for details.
author nickg
date Mon, 19 Jan 2004 14:35:01 +0000
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1476
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1 #ifndef CYGONCE_FATFS_FATFS_H
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2 #define CYGONCE_FATFS_FATFS_H
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3 //==========================================================================
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4 //
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5 // fatfs.h
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6 //
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7 // FAT file system header
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8 //
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9 //==========================================================================
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10 //####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 2003 Savin Zlobec
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License along
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25 // with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use macros
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29 // or inline functions from this file, or you compile this file and link it
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30 // with other works to produce a work based on this file, this file does not
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31 // by itself cause the resulting work to be covered by the GNU General Public
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32 // License. However the source code for this file must still be made available
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33 // in accordance with section (3) of the GNU General Public License.
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34 //
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35 // This exception does not invalidate any other reasons why a work based on
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36 // this file might be covered by the GNU General Public License.
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37 //
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): savin
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44 // Date: 2003-06-29
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45 //
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46 //####DESCRIPTIONEND####
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47 //
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48 //==========================================================================
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49
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50 #include <pkgconf/fs_fat.h>
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51 #include <cyg/kernel/kapi.h>
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52 #include <cyg/infra/cyg_type.h>
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53 #include <cyg/io/io.h>
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54 #include <blib/blib.h>
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55
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56 #include <unistd.h>
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57 #include <sys/types.h>
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58 #include <fcntl.h>
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59 #include <sys/stat.h>
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60 #include <errno.h>
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61 #include <dirent.h>
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62
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63 #include <stdlib.h>
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64 #include <string.h>
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65
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66 #include <cyg/fileio/fileio.h>
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67
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68 // --------------------------------------------------------------------------
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69
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70 #define FATFS_HASH_TABLE_SIZE CYGNUM_FS_FAT_NODE_HASH_TABLE_SIZE
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71
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72 #define FATFS_NODE_ALLOC_THRESHOLD CYGNUM_FS_FAT_NODE_ALLOC_THRESHOLD
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73
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74 #define FATFS_FAT_TABLE_CACHE_INCREMENT CYGNUM_FS_FAT_FAT_TABLE_CACHE_INCREMENT
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75
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76 #ifdef CYGDBG_FS_FAT_NODE_CACHE_EXTRA_CHECKS
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77 # define FATFS_NODE_CACHE_EXTRA_CHECKS 1
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78 #endif
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79
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80 // --------------------------------------------------------------------------
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81
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82 // Node cache tracing support
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83 //#define FATFS_TRACE_NODE_CACHE 1
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84
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85 // FAT table cache tracing support
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86 //#define FATFS_TRACE_FAT_TABLE_CACHE 1
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87
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88 // FAT table operations tracing support
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89 //#define FATFS_TRACE_FAT_TABLE 1
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90
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91 // FAT dir entry operations tracing support
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92 //#define FATFS_TRACE_DIR_ENTRY 1
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93
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94 // FAT clusters operations tracing support
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95 //#define FATFS_TRACE_CLUSTER 1
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96
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97 // FAT data tracing support
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98 //#define FATFS_TRACE_DATA 1
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99
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100 // FAT file operations tracing support
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101 //#define FATFS_TRACE_FILE_OP 1
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102
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103 // FAT filesystem operations tracing support
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104 //#define FATFS_TRACE_FS_OP 1
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105
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106 // --------------------------------------------------------------------------
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107
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108 typedef enum fatfs_type_e
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109 {
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110 FATFS_FAT12 = 0,
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111 FATFS_FAT16
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112 } fatfs_type_t;
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113
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114 typedef struct fatfs_data_pos_s
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115 {
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116 cyg_uint32 cluster; // Cluster number
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117 cyg_uint32 cluster_snum; // Cluster file seq number
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118 // (0 - first cluster of file,
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119 // 1 - second cluster of file, ...)
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120 cyg_uint32 cluster_pos; // Position inside cluster
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121 } fatfs_data_pos_t;
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122
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123 typedef struct fatfs_tcache_s
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124 {
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125 cyg_uint32 *clusters; // Cached clusters array
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126 cyg_uint32 size; // Number of cached clusters in array
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127 cyg_uint32 max_size; // Size of array (allocated space)
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128 } fatfs_tcache_t;
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129
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130 typedef struct fatfs_node_s
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131 {
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132 char filename[12+1]; // File name
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133 mode_t mode; // Node type
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134 cyg_ucount32 refcnt; // Open file/current dir references
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135 size_t size; // Size of file in bytes
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136 time_t ctime; // Creation timestamp
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137 time_t atime; // Last access timestamp
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138 time_t mtime; // Last write timestamp
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139 cyg_uint8 priv_data; // Private data
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140 cyg_uint32 cluster; // First cluster number
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141 cyg_uint32 parent_cluster; // First cluster of parent dentry
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142 fatfs_data_pos_t dentry_pos; // Position of node's dir entry on disk
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143
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144 struct fatfs_node_s *list_prev; // Next node in list
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145 struct fatfs_node_s *list_next; // Prev node in list
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146 struct fatfs_node_s *hash_next; // Next node in hash
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147
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148 fatfs_tcache_t tcache; // Node FAT table clusters cache
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149 } fatfs_node_t;
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150
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151 typedef struct fatfs_hash_table_s
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152 {
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153 cyg_uint32 size; // Number of slots
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154 cyg_uint32 n; // Number of nodes
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155 fatfs_node_t *nodes[FATFS_HASH_TABLE_SIZE]; // Nodes slots
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156 } fatfs_hash_table_t;
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157
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158 typedef struct fatfs_node_list_s
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159 {
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160 cyg_uint32 size; // Number of nodes in list
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161 fatfs_node_t *first; // First node in list
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162 fatfs_node_t *last; // Last node in list
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163 } fatfs_node_list_t;
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164
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165 typedef struct fatfs_disk_s
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166 {
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167 cyg_uint32 sector_size; // Sector size in bytes
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168 cyg_uint32 sector_size_log2; // Sector size log2
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169 cyg_uint32 cluster_size; // Cluster size in bytes
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170 cyg_uint32 cluster_size_log2; // Cluster size log2
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171 cyg_uint32 fat_tbl_pos; // Position of the first FAT table
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172 cyg_uint32 fat_tbl_size; // FAT table size in bytes
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173 cyg_uint32 fat_tbl_nents; // Number of entries in FAT table
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174 cyg_uint32 fat_tbls_num; // Number of FAT tables
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175 cyg_uint32 fat_root_dir_pos; // Position of the root dir
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176 cyg_uint32 fat_root_dir_size; // Root dir size in bytes
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177 cyg_uint32 fat_root_dir_nents; // Max number of entries in root dir
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178 cyg_uint32 fat_data_pos; // Position of data area
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179 fatfs_type_t fat_type; // Type of FAT - 12 or 16
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180
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181 cyg_io_handle_t dev_h; // Disk device handle
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182 fatfs_node_t *root; // Root dir node
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183
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184 cyg_uint8 *tcache_mem; // FAT table cache memory base
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185 cyg_handle_t tcache_mpool_h; // FAT table cache memory pool handle
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186 cyg_mempool_var tcache_mpool; // FAT table cache memory pool struct
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187
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188 cyg_uint8 *bcache_mem; // Block cache memory base
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189 cyg_blib_t blib; // Block cache and access library instance
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190
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191 fatfs_node_list_t live_nlist; // List of nodes with refcnt > 0
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192 fatfs_node_list_t dead_nlist; // List of nodes with refcnt == 0
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193 fatfs_hash_table_t node_hash; // Hash of nodes in live and dead lists
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194 } fatfs_disk_t;
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195
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196 // --------------------------------------------------------------------------
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197
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198 int fatfs_get_disk_info(fatfs_disk_t *disk);
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199
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200 void fatfs_get_root_node(fatfs_disk_t *disk, fatfs_node_t *root);
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201
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202 bool fatfs_is_node_root_node(fatfs_node_t *node);
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203
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204 int fatfs_get_dir_entry_node(fatfs_disk_t *disk,
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205 fatfs_node_t *dir,
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206 cyg_uint32 *pos,
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207 fatfs_node_t *node);
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208
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209 int fatfs_write_file_attr(fatfs_disk_t *disk, fatfs_node_t *node);
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210
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211 int fatfs_delete_file(fatfs_disk_t *disk, fatfs_node_t *node);
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212
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213 int fatfs_create_file(fatfs_disk_t *disk,
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214 fatfs_node_t *dir,
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215 const char *name,
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216 int namelen,
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217 fatfs_node_t *node);
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218
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219 int fatfs_create_dir(fatfs_disk_t *disk,
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220 fatfs_node_t *dir,
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221 const char *name,
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222 int namelen,
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223 fatfs_node_t *node);
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224
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225 int fatfs_trunc_file(fatfs_disk_t *disk, fatfs_node_t *node);
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226
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227 int fatfs_rename_file(fatfs_disk_t *disk,
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228 fatfs_node_t *dir1,
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229 fatfs_node_t *node,
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230 fatfs_node_t *dir2,
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231 const char *name,
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232 int namelen);
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233
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234 int fatfs_read_data(fatfs_disk_t *disk,
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235 fatfs_node_t *node,
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236 void *data,
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237 cyg_uint32 *len,
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238 cyg_uint32 off);
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239
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240 int fatfs_write_data(fatfs_disk_t *disk,
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241 fatfs_node_t *node,
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242 void *data,
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243 cyg_uint32 *len,
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244 cyg_uint32 off);
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245
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246 // --------------------------------------------------------------------------
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247
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248 void fatfs_node_cache_init(fatfs_disk_t *disk);
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249
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250 void fatfs_node_cache_flush(fatfs_disk_t *disk);
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251
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252 fatfs_node_t *fatfs_node_alloc(fatfs_disk_t *disk, fatfs_node_t *node_data);
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253
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254 void fatfs_node_ref(fatfs_disk_t *disk, fatfs_node_t *node);
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255
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256 void fatfs_node_unref(fatfs_disk_t *disk, fatfs_node_t *node);
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257
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258 void fatfs_node_touch(fatfs_disk_t *disk, fatfs_node_t *node);
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259
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260 void fatfs_node_rehash(fatfs_disk_t *disk, fatfs_node_t *node);
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261
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262 void fatfs_node_free(fatfs_disk_t *disk, fatfs_node_t *node);
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263
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264 fatfs_node_t* fatfs_node_find(fatfs_disk_t *disk,
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265 const char *name,
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266 unsigned int namelen,
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267 cyg_uint32 parent_cluster);
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268
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269 int fatfs_get_live_node_count(fatfs_disk_t *disk);
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270
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271 int fatfs_get_dead_node_count(fatfs_disk_t *disk);
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272
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273 void fatfs_node_flush_dead_tcache(fatfs_disk_t *disk);
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274
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275 // --------------------------------------------------------------------------
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276
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277 int fatfs_tcache_create(fatfs_disk_t *disk, cyg_uint32 mem_size);
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278
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279 void fatfs_tcache_delete(fatfs_disk_t *disk);
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280
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281 void fatfs_tcache_init(fatfs_disk_t *disk, fatfs_tcache_t *tcache);
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282
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283 void fatfs_tcache_flush(fatfs_disk_t *disk, fatfs_tcache_t *tcache);
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284
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285 bool fatfs_tcache_get(fatfs_disk_t *disk,
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286 fatfs_tcache_t *tcache,
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287 cyg_uint32 num,
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288 cyg_uint32 *cluster);
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289
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290 bool fatfs_tcache_get_last(fatfs_disk_t *disk,
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291 fatfs_tcache_t *tcache,
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292 cyg_uint32 *num,
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293 cyg_uint32 *cluster);
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294
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295 bool fatfs_tcache_set(fatfs_disk_t *disk,
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296 fatfs_tcache_t *tcache,
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297 cyg_uint32 num,
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298 cyg_uint32 cluster);
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299
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300 // --------------------------------------------------------------------------
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301 // Support routines
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302 // These enable the definition of local versions of certain routines
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303 // if the given packages are not present.
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304
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305 #ifndef CYGPKG_LIBC_I18N
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306
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307 __externC int toupper( int c );
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308
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309 #endif
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310
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311 #ifndef CYGFUN_LIBC_STRING_BSD_FUNCS
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312
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313 __externC int strcasecmp( const char *s1, const char *s2 );
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314
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315 __externC int strncasecmp( const char *s1, const char *s2, size_t n );
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316
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317 #endif
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318
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319 // --------------------------------------------------------------------------
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320
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321 #endif // CYGONCE_FATFS_FATFS_H
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322
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323 // --------------------------------------------------------------------------
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324 // EOF fatfs.h