Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_MSDOS_FS_H |
| 2 | #define _LINUX_MSDOS_FS_H |
| 3 | |
Jeff Garzik | e18fa70 | 2006-09-24 11:13:19 -0400 | [diff] [blame] | 4 | #include <linux/magic.h> |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | /* |
| 7 | * The MS-DOS filesystem constants/structures |
| 8 | */ |
| 9 | #include <asm/byteorder.h> |
| 10 | |
| 11 | #define SECTOR_SIZE 512 /* sector size (bytes) */ |
| 12 | #define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */ |
| 13 | #define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */ |
| 14 | #define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ |
| 15 | #define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) |
| 16 | #define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ |
| 17 | #define CF_LE_W(v) le16_to_cpu(v) |
| 18 | #define CF_LE_L(v) le32_to_cpu(v) |
| 19 | #define CT_LE_W(v) cpu_to_le16(v) |
| 20 | #define CT_LE_L(v) cpu_to_le32(v) |
| 21 | |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ |
| 24 | #define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ |
| 25 | |
| 26 | /* directory limit */ |
| 27 | #define FAT_MAX_DIR_ENTRIES (65536) |
| 28 | #define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) |
| 29 | |
| 30 | #define ATTR_NONE 0 /* no attribute bits */ |
| 31 | #define ATTR_RO 1 /* read-only */ |
| 32 | #define ATTR_HIDDEN 2 /* hidden */ |
| 33 | #define ATTR_SYS 4 /* system */ |
| 34 | #define ATTR_VOLUME 8 /* volume label */ |
| 35 | #define ATTR_DIR 16 /* directory */ |
| 36 | #define ATTR_ARCH 32 /* archived */ |
| 37 | |
| 38 | /* attribute bits that are copied "as is" */ |
| 39 | #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) |
| 40 | /* bits that are used by the Windows 95/Windows NT extended FAT */ |
| 41 | #define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) |
| 42 | |
| 43 | #define CASE_LOWER_BASE 8 /* base is lower case */ |
| 44 | #define CASE_LOWER_EXT 16 /* extension is lower case */ |
| 45 | |
| 46 | #define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ |
| 47 | #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) |
| 48 | |
| 49 | /* valid file mode bits */ |
| 50 | #define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) |
| 51 | /* Convert attribute bits and a mask to the UNIX mode. */ |
| 52 | #define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) |
| 53 | |
| 54 | #define MSDOS_NAME 11 /* maximum name length */ |
| 55 | #define MSDOS_LONGNAME 256 /* maximum name length */ |
| 56 | #define MSDOS_SLOTS 21 /* max # of slots for short and long names */ |
| 57 | #define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ |
| 58 | #define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ |
| 59 | |
| 60 | /* media of boot sector */ |
Andrew Morton | 73f20e5 | 2008-04-28 02:16:30 -0700 | [diff] [blame] | 61 | static inline int fat_valid_media(u8 media) |
| 62 | { |
| 63 | return 0xf8 <= media || media == 0xf0; |
| 64 | } |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ |
| 67 | MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) |
| 68 | |
| 69 | /* start of data cluster's entry (number of reserved clusters) */ |
| 70 | #define FAT_START_ENT 2 |
| 71 | |
| 72 | /* maximum number of clusters */ |
| 73 | #define MAX_FAT12 0xFF4 |
| 74 | #define MAX_FAT16 0xFFF4 |
| 75 | #define MAX_FAT32 0x0FFFFFF6 |
| 76 | #define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \ |
| 77 | MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) |
| 78 | |
| 79 | /* bad cluster mark */ |
| 80 | #define BAD_FAT12 0xFF7 |
| 81 | #define BAD_FAT16 0xFFF7 |
| 82 | #define BAD_FAT32 0x0FFFFFF7 |
| 83 | |
| 84 | /* standard EOF */ |
| 85 | #define EOF_FAT12 0xFFF |
| 86 | #define EOF_FAT16 0xFFFF |
| 87 | #define EOF_FAT32 0x0FFFFFFF |
| 88 | |
| 89 | #define FAT_ENT_FREE (0) |
| 90 | #define FAT_ENT_BAD (BAD_FAT32) |
| 91 | #define FAT_ENT_EOF (EOF_FAT32) |
| 92 | |
| 93 | #define FAT_FSINFO_SIG1 0x41615252 |
| 94 | #define FAT_FSINFO_SIG2 0x61417272 |
| 95 | #define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \ |
| 96 | && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2) |
| 97 | |
| 98 | /* |
| 99 | * ioctl commands |
| 100 | */ |
| 101 | #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2]) |
| 102 | #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2]) |
| 103 | /* <linux/videotext.h> has used 0x72 ('r') in collision, so skip a few */ |
| 104 | #define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) |
| 105 | #define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) |
| 106 | |
| 107 | /* |
| 108 | * vfat shortname flags |
| 109 | */ |
| 110 | #define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase for display */ |
| 111 | #define VFAT_SFN_DISPLAY_WIN95 0x0002 /* emulate win95 rule for display */ |
| 112 | #define VFAT_SFN_DISPLAY_WINNT 0x0004 /* emulate winnt rule for display */ |
| 113 | #define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */ |
| 114 | #define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */ |
| 115 | |
| 116 | struct fat_boot_sector { |
| 117 | __u8 ignored[3]; /* Boot strap short or near jump */ |
| 118 | __u8 system_id[8]; /* Name - can be used to special case |
| 119 | partition manager volumes */ |
| 120 | __u8 sector_size[2]; /* bytes per logical sector */ |
| 121 | __u8 sec_per_clus; /* sectors/cluster */ |
| 122 | __le16 reserved; /* reserved sectors */ |
| 123 | __u8 fats; /* number of FATs */ |
| 124 | __u8 dir_entries[2]; /* root directory entries */ |
| 125 | __u8 sectors[2]; /* number of sectors */ |
| 126 | __u8 media; /* media code */ |
| 127 | __le16 fat_length; /* sectors/FAT */ |
| 128 | __le16 secs_track; /* sectors per track */ |
| 129 | __le16 heads; /* number of heads */ |
| 130 | __le32 hidden; /* hidden sectors (unused) */ |
| 131 | __le32 total_sect; /* number of sectors (if sectors == 0) */ |
| 132 | |
| 133 | /* The following fields are only used by FAT32 */ |
| 134 | __le32 fat32_length; /* sectors/FAT */ |
| 135 | __le16 flags; /* bit 8: fat mirroring, low 4: active fat */ |
| 136 | __u8 version[2]; /* major, minor filesystem version */ |
| 137 | __le32 root_cluster; /* first cluster in root directory */ |
| 138 | __le16 info_sector; /* filesystem info sector */ |
| 139 | __le16 backup_boot; /* backup boot sector */ |
| 140 | __le16 reserved2[6]; /* Unused */ |
| 141 | }; |
| 142 | |
| 143 | struct fat_boot_fsinfo { |
| 144 | __le32 signature1; /* 0x41615252L */ |
| 145 | __le32 reserved1[120]; /* Nothing as far as I can tell */ |
| 146 | __le32 signature2; /* 0x61417272L */ |
| 147 | __le32 free_clusters; /* Free cluster count. -1 if unknown */ |
| 148 | __le32 next_cluster; /* Most recently allocated cluster */ |
| 149 | __le32 reserved2[4]; |
| 150 | }; |
| 151 | |
| 152 | struct msdos_dir_entry { |
OGAWA Hirofumi | 9aacd59 | 2007-07-15 23:39:56 -0700 | [diff] [blame] | 153 | __u8 name[MSDOS_NAME];/* name and extension */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | __u8 attr; /* attribute bits */ |
| 155 | __u8 lcase; /* Case for base and extension */ |
| 156 | __u8 ctime_cs; /* Creation time, centiseconds (0-199) */ |
| 157 | __le16 ctime; /* Creation time */ |
| 158 | __le16 cdate; /* Creation date */ |
| 159 | __le16 adate; /* Last access date */ |
| 160 | __le16 starthi; /* High 16 bits of cluster in FAT32 */ |
| 161 | __le16 time,date,start;/* time, date and first cluster */ |
| 162 | __le32 size; /* file size (in bytes) */ |
| 163 | }; |
| 164 | |
| 165 | /* Up to 13 characters of the name */ |
| 166 | struct msdos_dir_slot { |
| 167 | __u8 id; /* sequence number for slot */ |
| 168 | __u8 name0_4[10]; /* first 5 characters in name */ |
| 169 | __u8 attr; /* attribute byte */ |
| 170 | __u8 reserved; /* always 0 */ |
| 171 | __u8 alias_checksum; /* checksum for 8.3 alias */ |
| 172 | __u8 name5_10[12]; /* 6 more characters in name */ |
| 173 | __le16 start; /* starting cluster number, 0 in long slots */ |
| 174 | __u8 name11_12[4]; /* last 2 characters in name */ |
| 175 | }; |
| 176 | |
| 177 | struct fat_slot_info { |
| 178 | loff_t i_pos; /* on-disk position of directory entry */ |
| 179 | loff_t slot_off; /* offset for slot or de start */ |
| 180 | int nr_slots; /* number of slots + 1(de) in filename */ |
| 181 | struct msdos_dir_entry *de; |
| 182 | struct buffer_head *bh; |
| 183 | }; |
| 184 | |
| 185 | #ifdef __KERNEL__ |
| 186 | |
| 187 | #include <linux/buffer_head.h> |
| 188 | #include <linux/string.h> |
| 189 | #include <linux/nls.h> |
| 190 | #include <linux/fs.h> |
Arjan van de Ven | 6b9438e | 2006-03-23 03:00:48 -0800 | [diff] [blame] | 191 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | struct fat_mount_options { |
| 194 | uid_t fs_uid; |
| 195 | gid_t fs_gid; |
| 196 | unsigned short fs_fmask; |
| 197 | unsigned short fs_dmask; |
| 198 | unsigned short codepage; /* Codepage for shortname conversions */ |
| 199 | char *iocharset; /* Charset used for filename input/display */ |
| 200 | unsigned short shortname; /* flags for shortname display/create rule */ |
| 201 | unsigned char name_check; /* r = relaxed, n = normal, s = strict */ |
OGAWA Hirofumi | 1ae43f8 | 2008-04-28 02:16:26 -0700 | [diff] [blame] | 202 | unsigned short allow_utime;/* permission for setting the [am]time */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | unsigned quiet:1, /* set = fake successful chmods and chowns */ |
| 204 | showexec:1, /* set = only set x bit for com/exe/bat */ |
| 205 | sys_immutable:1, /* set = system files are immutable */ |
| 206 | dotsOK:1, /* set = hidden and system files are named '.filename' */ |
| 207 | isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ |
Alexey Dobriyan | 4de151d | 2006-03-22 00:13:35 +0100 | [diff] [blame] | 208 | utf8:1, /* Use of UTF-8 character set (Default) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | unicode_xlate:1, /* create escape sequences for unhandled Unicode */ |
| 210 | numtail:1, /* Does first alias have a numeric '~1' type tail? */ |
| 211 | atari:1, /* Use Atari GEMDOS variation of MS-DOS fs */ |
Chris Mason | ae78bf9 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 212 | flush:1, /* write things quickly */ |
OGAWA Hirofumi | 28ec039 | 2007-05-08 00:31:01 -0700 | [diff] [blame] | 213 | nocase:1, /* Does this need case conversion? 0=need case conversion*/ |
| 214 | usefree:1; /* Use free_clusters for FAT32 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | }; |
| 216 | |
| 217 | #define FAT_HASH_BITS 8 |
| 218 | #define FAT_HASH_SIZE (1UL << FAT_HASH_BITS) |
| 219 | #define FAT_HASH_MASK (FAT_HASH_SIZE-1) |
| 220 | |
| 221 | /* |
| 222 | * MS-DOS file system in-core superblock data |
| 223 | */ |
| 224 | struct msdos_sb_info { |
| 225 | unsigned short sec_per_clus; /* sectors/cluster */ |
| 226 | unsigned short cluster_bits; /* log2(cluster_size) */ |
| 227 | unsigned int cluster_size; /* cluster size */ |
| 228 | unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */ |
| 229 | unsigned short fat_start; |
| 230 | unsigned long fat_length; /* FAT start & length (sec.) */ |
| 231 | unsigned long dir_start; |
| 232 | unsigned short dir_entries; /* root dir start & entries */ |
| 233 | unsigned long data_start; /* first data sector */ |
| 234 | unsigned long max_cluster; /* maximum cluster number */ |
| 235 | unsigned long root_cluster; /* first cluster of the root directory */ |
| 236 | unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ |
Arjan van de Ven | 6b9438e | 2006-03-23 03:00:48 -0800 | [diff] [blame] | 237 | struct mutex fat_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | unsigned int prev_free; /* previously allocated cluster number */ |
| 239 | unsigned int free_clusters; /* -1 if undefined */ |
OGAWA Hirofumi | 606e423 | 2008-04-28 02:16:27 -0700 | [diff] [blame] | 240 | unsigned int free_clus_valid; /* is free_clusters valid? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | struct fat_mount_options options; |
| 242 | struct nls_table *nls_disk; /* Codepage used on disk */ |
| 243 | struct nls_table *nls_io; /* Charset used for input and display */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 244 | const void *dir_ops; /* Opaque; default directory operations */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | int dir_per_block; /* dir entries per block */ |
| 246 | int dir_per_block_bits; /* log2(dir_per_block) */ |
| 247 | |
| 248 | int fatent_shift; |
| 249 | struct fatent_operations *fatent_ops; |
| 250 | |
| 251 | spinlock_t inode_hash_lock; |
| 252 | struct hlist_head inode_hashtable[FAT_HASH_SIZE]; |
| 253 | }; |
| 254 | |
| 255 | #define FAT_CACHE_VALID 0 /* special case for valid cache */ |
| 256 | |
| 257 | /* |
| 258 | * MS-DOS file system inode data in memory |
| 259 | */ |
| 260 | struct msdos_inode_info { |
| 261 | spinlock_t cache_lru_lock; |
| 262 | struct list_head cache_lru; |
| 263 | int nr_caches; |
| 264 | /* for avoiding the race between fat_free() and fat_get_cluster() */ |
| 265 | unsigned int cache_valid_id; |
| 266 | |
| 267 | loff_t mmu_private; |
| 268 | int i_start; /* first cluster or 0 */ |
| 269 | int i_logstart; /* logical first cluster */ |
| 270 | int i_attrs; /* unused attribute bits */ |
| 271 | loff_t i_pos; /* on-disk position of directory entry or 0 */ |
| 272 | struct hlist_node i_fat_hash; /* hash by i_location */ |
| 273 | struct inode vfs_inode; |
| 274 | }; |
| 275 | |
| 276 | static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb) |
| 277 | { |
| 278 | return sb->s_fs_info; |
| 279 | } |
| 280 | |
| 281 | static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) |
| 282 | { |
| 283 | return container_of(inode, struct msdos_inode_info, vfs_inode); |
| 284 | } |
| 285 | |
| 286 | /* Return the FAT attribute byte for this inode */ |
| 287 | static inline u8 fat_attr(struct inode *inode) |
| 288 | { |
| 289 | return ((inode->i_mode & S_IWUGO) ? ATTR_NONE : ATTR_RO) | |
| 290 | (S_ISDIR(inode->i_mode) ? ATTR_DIR : ATTR_NONE) | |
| 291 | MSDOS_I(inode)->i_attrs; |
| 292 | } |
| 293 | |
OGAWA Hirofumi | 451cbaa | 2005-10-30 15:03:49 -0800 | [diff] [blame] | 294 | static inline unsigned char fat_checksum(const __u8 *name) |
| 295 | { |
| 296 | unsigned char s = name[0]; |
| 297 | s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2]; |
| 298 | s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4]; |
| 299 | s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6]; |
| 300 | s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8]; |
| 301 | s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10]; |
| 302 | return s; |
| 303 | } |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus) |
| 306 | { |
| 307 | return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus |
| 308 | + sbi->data_start; |
| 309 | } |
| 310 | |
| 311 | static inline void fat16_towchar(wchar_t *dst, const __u8 *src, size_t len) |
| 312 | { |
| 313 | #ifdef __BIG_ENDIAN |
| 314 | while (len--) { |
| 315 | *dst++ = src[0] | (src[1] << 8); |
| 316 | src += 2; |
| 317 | } |
| 318 | #else |
| 319 | memcpy(dst, src, len * 2); |
| 320 | #endif |
| 321 | } |
| 322 | |
| 323 | static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) |
| 324 | { |
| 325 | #ifdef __BIG_ENDIAN |
| 326 | while (len--) { |
| 327 | dst[0] = *src & 0x00FF; |
| 328 | dst[1] = (*src & 0xFF00) >> 8; |
| 329 | dst += 2; |
| 330 | src++; |
| 331 | } |
| 332 | #else |
| 333 | memcpy(dst, src, len * 2); |
| 334 | #endif |
| 335 | } |
| 336 | |
| 337 | /* fat/cache.c */ |
| 338 | extern void fat_cache_inval_inode(struct inode *inode); |
| 339 | extern int fat_get_cluster(struct inode *inode, int cluster, |
| 340 | int *fclus, int *dclus); |
OGAWA Hirofumi | e5174ba | 2006-01-08 01:02:11 -0800 | [diff] [blame] | 341 | extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys, |
| 342 | unsigned long *mapped_blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | /* fat/dir.c */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 345 | extern const struct file_operations fat_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | extern int fat_search_long(struct inode *inode, const unsigned char *name, |
| 347 | int name_len, struct fat_slot_info *sinfo); |
| 348 | extern int fat_dir_empty(struct inode *dir); |
| 349 | extern int fat_subdirs(struct inode *dir); |
| 350 | extern int fat_scan(struct inode *dir, const unsigned char *name, |
| 351 | struct fat_slot_info *sinfo); |
| 352 | extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, |
| 353 | struct msdos_dir_entry **de, loff_t *i_pos); |
| 354 | extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); |
| 355 | extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, |
| 356 | struct fat_slot_info *sinfo); |
| 357 | extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); |
| 358 | |
| 359 | /* fat/fatent.c */ |
| 360 | struct fat_entry { |
| 361 | int entry; |
| 362 | union { |
| 363 | u8 *ent12_p[2]; |
| 364 | __le16 *ent16_p; |
| 365 | __le32 *ent32_p; |
| 366 | } u; |
| 367 | int nr_bhs; |
| 368 | struct buffer_head *bhs[2]; |
| 369 | }; |
| 370 | |
| 371 | static inline void fatent_init(struct fat_entry *fatent) |
| 372 | { |
| 373 | fatent->nr_bhs = 0; |
| 374 | fatent->entry = 0; |
| 375 | fatent->u.ent32_p = NULL; |
| 376 | fatent->bhs[0] = fatent->bhs[1] = NULL; |
| 377 | } |
| 378 | |
| 379 | static inline void fatent_set_entry(struct fat_entry *fatent, int entry) |
| 380 | { |
| 381 | fatent->entry = entry; |
| 382 | fatent->u.ent32_p = NULL; |
| 383 | } |
| 384 | |
| 385 | static inline void fatent_brelse(struct fat_entry *fatent) |
| 386 | { |
| 387 | int i; |
| 388 | fatent->u.ent32_p = NULL; |
| 389 | for (i = 0; i < fatent->nr_bhs; i++) |
| 390 | brelse(fatent->bhs[i]); |
| 391 | fatent->nr_bhs = 0; |
| 392 | fatent->bhs[0] = fatent->bhs[1] = NULL; |
| 393 | } |
| 394 | |
| 395 | extern void fat_ent_access_init(struct super_block *sb); |
| 396 | extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent, |
| 397 | int entry); |
| 398 | extern int fat_ent_write(struct inode *inode, struct fat_entry *fatent, |
| 399 | int new, int wait); |
| 400 | extern int fat_alloc_clusters(struct inode *inode, int *cluster, |
| 401 | int nr_cluster); |
| 402 | extern int fat_free_clusters(struct inode *inode, int cluster); |
| 403 | extern int fat_count_free_clusters(struct super_block *sb); |
| 404 | |
| 405 | /* fat/file.c */ |
| 406 | extern int fat_generic_ioctl(struct inode *inode, struct file *filp, |
| 407 | unsigned int cmd, unsigned long arg); |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 408 | extern const struct file_operations fat_file_operations; |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 409 | extern const struct inode_operations fat_file_inode_operations; |
OGAWA Hirofumi | 1278fdd | 2008-04-28 02:16:25 -0700 | [diff] [blame] | 410 | extern int fat_setattr(struct dentry * dentry, struct iattr * attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | extern void fat_truncate(struct inode *inode); |
OGAWA Hirofumi | da63fc7 | 2006-11-16 01:19:28 -0800 | [diff] [blame] | 412 | extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 413 | struct kstat *stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
| 415 | /* fat/inode.c */ |
| 416 | extern void fat_attach(struct inode *inode, loff_t i_pos); |
| 417 | extern void fat_detach(struct inode *inode); |
| 418 | extern struct inode *fat_iget(struct super_block *sb, loff_t i_pos); |
| 419 | extern struct inode *fat_build_inode(struct super_block *sb, |
| 420 | struct msdos_dir_entry *de, loff_t i_pos); |
| 421 | extern int fat_sync_inode(struct inode *inode); |
| 422 | extern int fat_fill_super(struct super_block *sb, void *data, int silent, |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 423 | const struct inode_operations *fs_dir_inode_ops, int isvfat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Chris Mason | ae78bf9 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 425 | extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, |
| 426 | struct inode *i2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /* fat/misc.c */ |
| 428 | extern void fat_fs_panic(struct super_block *s, const char *fmt, ...); |
| 429 | extern void fat_clusters_flush(struct super_block *sb); |
| 430 | extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); |
| 431 | extern int date_dos2unix(unsigned short time, unsigned short date); |
| 432 | extern void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date); |
| 433 | extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); |
| 434 | |
Adrian Bunk | a28af47 | 2006-03-28 01:56:26 -0800 | [diff] [blame] | 435 | int fat_cache_init(void); |
| 436 | void fat_cache_destroy(void); |
| 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | #endif /* __KERNEL__ */ |
| 439 | |
| 440 | #endif |