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Prex Home / Browse Source - Prex Version: 0.9.0 |
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root/usr/server/fs/fatfs/fatfs.h/* [<][>][^][v][top][bottom][index][help] */INCLUDED FROM1 /* 2 * Copyright (c) 2005-2007, Kohsuke Ohtani 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _FATFS_H 31 #define _FATFS_H 32 33 #include <sys/prex.h> 34 #include <sys/cdefs.h> 35 #include <sys/types.h> 36 #include <sys/vnode.h> 37 #include <sys/file.h> 38 #include <sys/mount.h> 39 #include <sys/syslog.h> 40 #include <sys/buf.h> 41 42 /* #define DEBUG_FATFS 1 */ 43 44 #ifdef DEBUG_FATFS 45 #define DPRINTF(a) dprintf a 46 #define ASSERT(e) dassert(e) 47 #else 48 #define DPRINTF(a) do {} while (0) 49 #define ASSERT(e) 50 #endif 51 52 53 #if CONFIG_FS_THREADS > 1 54 #define malloc(s) malloc_r(s) 55 #define free(p) free_r(p) 56 #else 57 #define mutex_init(m) do {} while (0) 58 #define mutex_destroy(m) do {} while (0) 59 #define mutex_lock(m) do {} while (0) 60 #define mutex_unlock(m) do {} while (0) 61 #define mutex_trylock(m) do {} while (0) 62 #endif 63 64 65 #define SEC_SIZE 512 /* sector size */ 66 #define SEC_INVAL 0xffffffff /* invalid sector */ 67 68 /* 69 * Pre-defined cluster number 70 */ 71 #define CL_ROOT 0 /* cluster 0 means the root directory */ 72 #define CL_FREE 0 /* cluster 0 also means the free cluster */ 73 #define CL_FIRST 2 /* first legal cluster */ 74 #define CL_LAST 0xfffffff5 /* last legal cluster */ 75 #define CL_EOF 0xffffffff /* EOF cluster */ 76 77 #define EOF_MASK 0xfffffff8 /* mask of eof */ 78 79 #define FAT12_MASK 0x00000fff 80 #define FAT16_MASK 0x0000ffff 81 82 #if defined(__SUNPRO_C) 83 #pragma pack(1) 84 #endif 85 86 /* 87 * BIOS parameter block 88 */ 89 struct fat_bpb { 90 uint16_t jmp_instruction; 91 uint8_t nop_instruction; 92 uint8_t oem_id[8]; 93 uint16_t bytes_per_sector; 94 uint8_t sectors_per_cluster; 95 uint16_t reserved_sectors; 96 uint8_t num_of_fats; 97 uint16_t root_entries; 98 uint16_t total_sectors; 99 uint8_t media_descriptor; 100 uint16_t sectors_per_fat; 101 uint16_t sectors_per_track; 102 uint16_t heads; 103 uint32_t hidden_sectors; 104 uint32_t big_total_sectors; 105 uint8_t physical_drive; 106 uint8_t reserved; 107 uint8_t ext_boot_signature; 108 uint32_t serial_no; 109 uint8_t volume_id[11]; 110 uint8_t file_sys_id[8]; 111 } __packed; 112 113 /* 114 * FAT directory entry 115 */ 116 struct fat_dirent { 117 uint8_t name[11]; 118 uint8_t attr; 119 uint8_t reserve[10]; 120 uint16_t time; 121 uint16_t date; 122 uint16_t cluster; 123 uint32_t size; 124 } __packed; 125 126 #if defined(__SUNPRO_C) 127 #pragma pack() 128 #endif 129 130 #define SLOT_EMPTY 0x00 131 #define SLOT_DELETED 0xe5 132 133 #define DIR_PER_SEC (SEC_SIZE / sizeof(struct fat_dirent)) 134 135 /* 136 * FAT attribute for attr 137 */ 138 #define FA_RDONLY 0x01 139 #define FA_HIDDEN 0x02 140 #define FA_SYSTEM 0x04 141 #define FA_VOLID 0x08 142 #define FA_SUBDIR 0x10 143 #define FA_ARCH 0x20 144 #define FA_DEVICE 0x40 145 146 #define IS_DIR(de) (((de)->attr) & FA_SUBDIR) 147 #define IS_VOL(de) (((de)->attr) & FA_VOLID) 148 #define IS_FILE(de) (!IS_DIR(de) && !IS_VOL(de)) 149 150 #define IS_DELETED(de) ((de)->name[0] == 0xe5) 151 #define IS_EMPTY(de) ((de)->name[0] == 0) 152 153 /* 154 * Mount data 155 */ 156 struct fatfsmount { 157 int fat_type; /* 12 or 16 */ 158 u_long root_start; /* start sector for root directory */ 159 u_long fat_start; /* start sector for fat entries */ 160 u_long data_start; /* start sector for data */ 161 u_long fat_eof; /* id of end cluster */ 162 u_long sec_per_cl; /* sectors per cluster */ 163 u_long cluster_size; /* cluster size */ 164 u_long last_cluster; /* last cluser */ 165 u_long fat_mask; /* mask for cluster# */ 166 u_long free_scan; /* start cluster# to free search */ 167 vnode_t root_vnode; /* vnode for root */ 168 char *io_buf; /* local data buffer */ 169 char *fat_buf; /* buffer for fat entry */ 170 char *dir_buf; /* buffer for directory entry */ 171 dev_t dev; /* mounted device */ 172 #if CONFIG_FS_THREADS > 1 173 mutex_t lock; /* file system lock */ 174 #endif 175 }; 176 177 #define FAT12(fat) ((fat)->fat_type == 12) 178 #define FAT16(fat) ((fat)->fat_type == 16) 179 180 #define IS_EOFCL(fat, cl) \ 181 (((cl) & EOF_MASK) == ((fat)->fat_mask & EOF_MASK)) 182 183 /* 184 * File/directory node 185 */ 186 struct fatfs_node { 187 struct fat_dirent dirent; /* copy of directory entry */ 188 u_long sector; /* sector# for directory entry */ 189 u_long offset; /* offset of directory entry in sector */ 190 }; 191 192 extern struct vnops fatfs_vnops; 193 194 /* Macro to convert cluster# to logical sector# */ 195 #define cl_to_sec(fat, cl) \ 196 (fat->data_start + (cl - 2) * fat->sec_per_cl) 197 198 __BEGIN_DECLS 199 int fat_next_cluster(struct fatfsmount *fmp, u_long cl, u_long *next); 200 int fat_set_cluster(struct fatfsmount *fmp, u_long cl, u_long next); 201 int fat_alloc_cluster(struct fatfsmount *fmp, u_long scan_start, u_long *free); 202 int fat_free_clusters(struct fatfsmount *fmp, u_long start); 203 int fat_seek_cluster(struct fatfsmount *fmp, u_long start, u_long offset, 204 u_long *cl); 205 int fat_expand_file(struct fatfsmount *fmp, u_long cl, int size); 206 int fat_expand_dir(struct fatfsmount *fmp, u_long cl, u_long *new_cl); 207 208 void fat_convert_name(char *org, char *name); 209 void fat_restore_name(char *org, char *name); 210 int fat_valid_name(char *name); 211 int fat_compare_name(char *n1, char *n2); 212 void fat_mode_to_attr(mode_t mode, u_char *attr); 213 void fat_attr_to_mode(u_char attr, mode_t *mode); 214 215 int fatfs_lookup_node(vnode_t dvp, char *name, struct fatfs_node *node); 216 int fatfs_get_node(vnode_t dvp, int index, struct fatfs_node *node); 217 int fatfs_put_node(struct fatfsmount *fmp, struct fatfs_node *node); 218 int fatfs_add_node(vnode_t dvp, struct fatfs_node *node); 219 __END_DECLS 220 221 #endif /* !_FATFS_H */ /* [<][>][^][v][top][bottom][index][help] */ | |||
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Copyright© 2005-2009 Kohsuke Ohtani |
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