OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 1 | #ifndef _FAT_H |
| 2 | #define _FAT_H |
| 3 | |
| 4 | #include <linux/buffer_head.h> |
| 5 | #include <linux/string.h> |
| 6 | #include <linux/nls.h> |
| 7 | #include <linux/fs.h> |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 8 | #include <linux/hash.h> |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 9 | #include <linux/mutex.h> |
OGAWA Hirofumi | aaa04b4 | 2010-05-24 14:33:12 -0700 | [diff] [blame] | 10 | #include <linux/ratelimit.h> |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 11 | #include <linux/msdos_fs.h> |
| 12 | |
| 13 | /* |
| 14 | * vfat shortname flags |
| 15 | */ |
| 16 | #define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase for display */ |
| 17 | #define VFAT_SFN_DISPLAY_WIN95 0x0002 /* emulate win95 rule for display */ |
| 18 | #define VFAT_SFN_DISPLAY_WINNT 0x0004 /* emulate winnt rule for display */ |
| 19 | #define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */ |
| 20 | #define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */ |
| 21 | |
Denis Karpov | 85c7859 | 2009-06-04 02:34:22 +0900 | [diff] [blame] | 22 | #define FAT_ERRORS_CONT 1 /* ignore error and continue */ |
| 23 | #define FAT_ERRORS_PANIC 2 /* panic on error */ |
| 24 | #define FAT_ERRORS_RO 3 /* remount r/o on error */ |
| 25 | |
Namjae Jeon | 2628b7a | 2013-04-29 16:21:08 -0700 | [diff] [blame] | 26 | #define FAT_NFS_STALE_RW 1 /* NFS RW support, can cause ESTALE */ |
| 27 | #define FAT_NFS_NOSTALE_RO 2 /* NFS RO support, no ESTALE issue */ |
| 28 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 29 | struct fat_mount_options { |
Eric W. Biederman | 170782e | 2012-02-07 16:25:39 -0800 | [diff] [blame] | 30 | kuid_t fs_uid; |
| 31 | kgid_t fs_gid; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 32 | unsigned short fs_fmask; |
| 33 | unsigned short fs_dmask; |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 34 | unsigned short codepage; /* Codepage for shortname conversions */ |
Jan Kara | 58156c8 | 2012-12-17 16:02:58 -0800 | [diff] [blame] | 35 | int time_offset; /* Offset of timestamps from UTC (in minutes) */ |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 36 | char *iocharset; /* Charset used for filename input/display */ |
| 37 | unsigned short shortname; /* flags for shortname display/create rule */ |
| 38 | unsigned char name_check; /* r = relaxed, n = normal, s = strict */ |
| 39 | unsigned char errors; /* On error: continue, panic, remount-ro */ |
Namjae Jeon | 2628b7a | 2013-04-29 16:21:08 -0700 | [diff] [blame] | 40 | unsigned char nfs; /* NFS support: nostale_ro, stale_rw */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 41 | unsigned short allow_utime;/* permission for setting the [am]time */ |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 42 | unsigned quiet:1, /* set = fake successful chmods and chowns */ |
| 43 | showexec:1, /* set = only set x bit for com/exe/bat */ |
| 44 | sys_immutable:1, /* set = system files are immutable */ |
| 45 | dotsOK:1, /* set = hidden and system files are named '.filename' */ |
| 46 | isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ |
| 47 | utf8:1, /* Use of UTF-8 character set (Default) */ |
| 48 | unicode_xlate:1, /* create escape sequences for unhandled Unicode */ |
| 49 | numtail:1, /* Does first alias have a numeric '~1' type tail? */ |
| 50 | flush:1, /* write things quickly */ |
| 51 | nocase:1, /* Does this need case conversion? 0=need case conversion*/ |
| 52 | usefree:1, /* Use free_clusters for FAT32 */ |
Jan Kara | 58156c8 | 2012-12-17 16:02:58 -0800 | [diff] [blame] | 53 | tz_set:1, /* Filesystem timestamps' offset set */ |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 54 | rodir:1, /* allow ATTR_RO for directory */ |
Conrad Meyer | 190a884 | 2014-06-06 14:36:37 -0700 | [diff] [blame] | 55 | discard:1, /* Issue discard requests on deletions */ |
| 56 | dos1xfloppy:1; /* Assume default BPB for DOS 1.x floppies */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | #define FAT_HASH_BITS 8 |
| 60 | #define FAT_HASH_SIZE (1UL << FAT_HASH_BITS) |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 61 | |
| 62 | /* |
| 63 | * MS-DOS file system in-core superblock data |
| 64 | */ |
| 65 | struct msdos_sb_info { |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 66 | unsigned short sec_per_clus; /* sectors/cluster */ |
| 67 | unsigned short cluster_bits; /* log2(cluster_size) */ |
| 68 | unsigned int cluster_size; /* cluster size */ |
Cruz Julian Bishop | d5a4a38 | 2012-10-04 17:14:49 -0700 | [diff] [blame] | 69 | unsigned char fats, fat_bits; /* number of FATs, FAT bits (12 or 16) */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 70 | unsigned short fat_start; |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 71 | unsigned long fat_length; /* FAT start & length (sec.) */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 72 | unsigned long dir_start; |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 73 | unsigned short dir_entries; /* root dir start & entries */ |
| 74 | unsigned long data_start; /* first data sector */ |
| 75 | unsigned long max_cluster; /* maximum cluster number */ |
| 76 | unsigned long root_cluster; /* first cluster of the root directory */ |
| 77 | unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 78 | struct mutex fat_lock; |
Namjae Jeon | 8fceb4e | 2013-04-29 16:21:12 -0700 | [diff] [blame] | 79 | struct mutex nfs_build_inode_lock; |
Marco Stornelli | e40b34c | 2012-10-06 12:40:03 +0200 | [diff] [blame] | 80 | struct mutex s_lock; |
| 81 | unsigned int prev_free; /* previously allocated cluster number */ |
| 82 | unsigned int free_clusters; /* -1 if undefined */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 83 | unsigned int free_clus_valid; /* is free_clusters valid? */ |
| 84 | struct fat_mount_options options; |
Cruz Julian Bishop | 4a3aeb13 | 2012-10-04 17:14:52 -0700 | [diff] [blame] | 85 | struct nls_table *nls_disk; /* Codepage used on disk */ |
| 86 | struct nls_table *nls_io; /* Charset used for input and display */ |
| 87 | const void *dir_ops; /* Opaque; default directory operations */ |
| 88 | int dir_per_block; /* dir entries per block */ |
| 89 | int dir_per_block_bits; /* log2(dir_per_block) */ |
Mike Lockwood | 6e5b93e | 2013-07-08 16:00:46 -0700 | [diff] [blame] | 90 | unsigned int vol_id; /*volume ID*/ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 91 | |
| 92 | int fatent_shift; |
| 93 | struct fatent_operations *fatent_ops; |
Al Viro | b522412 | 2009-06-07 13:44:36 -0400 | [diff] [blame] | 94 | struct inode *fat_inode; |
Artem Bityutskiy | 020ac5b | 2012-05-31 16:26:12 -0700 | [diff] [blame] | 95 | struct inode *fsinfo_inode; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 96 | |
OGAWA Hirofumi | aaa04b4 | 2010-05-24 14:33:12 -0700 | [diff] [blame] | 97 | struct ratelimit_state ratelimit; |
| 98 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 99 | spinlock_t inode_hash_lock; |
| 100 | struct hlist_head inode_hashtable[FAT_HASH_SIZE]; |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 101 | |
| 102 | spinlock_t dir_hash_lock; |
| 103 | struct hlist_head dir_hashtable[FAT_HASH_SIZE]; |
Oleksij Rempel | b88a1058 | 2013-02-27 17:03:09 -0800 | [diff] [blame] | 104 | |
| 105 | unsigned int dirty; /* fs state before mount */ |
Al Viro | cac45b0 | 2013-10-03 13:16:50 -0400 | [diff] [blame] | 106 | struct rcu_head rcu; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | #define FAT_CACHE_VALID 0 /* special case for valid cache */ |
| 110 | |
| 111 | /* |
| 112 | * MS-DOS file system inode data in memory |
| 113 | */ |
| 114 | struct msdos_inode_info { |
| 115 | spinlock_t cache_lru_lock; |
| 116 | struct list_head cache_lru; |
| 117 | int nr_caches; |
| 118 | /* for avoiding the race between fat_free() and fat_get_cluster() */ |
| 119 | unsigned int cache_valid_id; |
| 120 | |
OGAWA Hirofumi | 2bdf67e | 2008-11-06 12:53:57 -0800 | [diff] [blame] | 121 | /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */ |
| 122 | loff_t mmu_private; /* physically allocated size */ |
| 123 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 124 | int i_start; /* first cluster or 0 */ |
| 125 | int i_logstart; /* logical first cluster */ |
| 126 | int i_attrs; /* unused attribute bits */ |
| 127 | loff_t i_pos; /* on-disk position of directory entry or 0 */ |
| 128 | struct hlist_node i_fat_hash; /* hash by i_location */ |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 129 | struct hlist_node i_dir_hash; /* hash by i_logstart */ |
Christoph Hellwig | 5826869 | 2011-06-24 14:29:40 -0400 | [diff] [blame] | 130 | struct rw_semaphore truncate_lock; /* protect bmap against truncate */ |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 131 | struct inode vfs_inode; |
| 132 | }; |
| 133 | |
| 134 | struct fat_slot_info { |
| 135 | loff_t i_pos; /* on-disk position of directory entry */ |
| 136 | loff_t slot_off; /* offset for slot or de start */ |
| 137 | int nr_slots; /* number of slots + 1(de) in filename */ |
| 138 | struct msdos_dir_entry *de; |
| 139 | struct buffer_head *bh; |
| 140 | }; |
| 141 | |
| 142 | static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb) |
| 143 | { |
| 144 | return sb->s_fs_info; |
| 145 | } |
| 146 | |
| 147 | static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) |
| 148 | { |
| 149 | return container_of(inode, struct msdos_inode_info, vfs_inode); |
| 150 | } |
| 151 | |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 152 | /* |
| 153 | * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to |
| 154 | * save ATTR_RO instead of ->i_mode. |
OGAWA Hirofumi | dfc209c | 2008-11-06 12:53:55 -0800 | [diff] [blame] | 155 | * |
| 156 | * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only |
| 157 | * bit, it's just used as flag for app. |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 158 | */ |
| 159 | static inline int fat_mode_can_hold_ro(struct inode *inode) |
| 160 | { |
| 161 | struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); |
Al Viro | dacd0e7 | 2011-07-26 03:21:30 -0400 | [diff] [blame] | 162 | umode_t mask; |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 163 | |
OGAWA Hirofumi | dfc209c | 2008-11-06 12:53:55 -0800 | [diff] [blame] | 164 | if (S_ISDIR(inode->i_mode)) { |
| 165 | if (!sbi->options.rodir) |
| 166 | return 0; |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 167 | mask = ~sbi->options.fs_dmask; |
OGAWA Hirofumi | dfc209c | 2008-11-06 12:53:55 -0800 | [diff] [blame] | 168 | } else |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 169 | mask = ~sbi->options.fs_fmask; |
| 170 | |
| 171 | if (!(mask & S_IWUGO)) |
| 172 | return 0; |
| 173 | return 1; |
| 174 | } |
| 175 | |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 176 | /* Convert attribute bits and a mask to the UNIX mode. */ |
Al Viro | dacd0e7 | 2011-07-26 03:21:30 -0400 | [diff] [blame] | 177 | static inline umode_t fat_make_mode(struct msdos_sb_info *sbi, |
| 178 | u8 attrs, umode_t mode) |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 179 | { |
OGAWA Hirofumi | dfc209c | 2008-11-06 12:53:55 -0800 | [diff] [blame] | 180 | if (attrs & ATTR_RO && !((attrs & ATTR_DIR) && !sbi->options.rodir)) |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 181 | mode &= ~S_IWUGO; |
| 182 | |
| 183 | if (attrs & ATTR_DIR) |
| 184 | return (mode & ~sbi->options.fs_dmask) | S_IFDIR; |
| 185 | else |
| 186 | return (mode & ~sbi->options.fs_fmask) | S_IFREG; |
| 187 | } |
| 188 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 189 | /* Return the FAT attribute byte for this inode */ |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 190 | static inline u8 fat_make_attrs(struct inode *inode) |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 191 | { |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 192 | u8 attrs = MSDOS_I(inode)->i_attrs; |
| 193 | if (S_ISDIR(inode->i_mode)) |
| 194 | attrs |= ATTR_DIR; |
| 195 | if (fat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO)) |
| 196 | attrs |= ATTR_RO; |
| 197 | return attrs; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 198 | } |
| 199 | |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 200 | static inline void fat_save_attrs(struct inode *inode, u8 attrs) |
| 201 | { |
OGAWA Hirofumi | 9183482 | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 202 | if (fat_mode_can_hold_ro(inode)) |
| 203 | MSDOS_I(inode)->i_attrs = attrs & ATTR_UNUSED; |
| 204 | else |
| 205 | MSDOS_I(inode)->i_attrs = attrs & (ATTR_UNUSED | ATTR_RO); |
OGAWA Hirofumi | 9c0aa1b | 2008-11-06 12:53:54 -0800 | [diff] [blame] | 206 | } |
| 207 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 208 | static inline unsigned char fat_checksum(const __u8 *name) |
| 209 | { |
| 210 | unsigned char s = name[0]; |
| 211 | s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2]; |
| 212 | s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4]; |
| 213 | s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6]; |
| 214 | s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8]; |
| 215 | s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10]; |
| 216 | return s; |
| 217 | } |
| 218 | |
| 219 | static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus) |
| 220 | { |
| 221 | return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus |
| 222 | + sbi->data_start; |
| 223 | } |
| 224 | |
Namjae Jeon | e22a444 | 2013-04-29 16:21:10 -0700 | [diff] [blame] | 225 | static inline void fat_get_blknr_offset(struct msdos_sb_info *sbi, |
| 226 | loff_t i_pos, sector_t *blknr, int *offset) |
| 227 | { |
| 228 | *blknr = i_pos >> sbi->dir_per_block_bits; |
| 229 | *offset = i_pos & (sbi->dir_per_block - 1); |
| 230 | } |
| 231 | |
Namjae Jeon | f21735d | 2013-04-29 16:21:09 -0700 | [diff] [blame] | 232 | static inline loff_t fat_i_pos_read(struct msdos_sb_info *sbi, |
| 233 | struct inode *inode) |
| 234 | { |
| 235 | loff_t i_pos; |
| 236 | #if BITS_PER_LONG == 32 |
| 237 | spin_lock(&sbi->inode_hash_lock); |
| 238 | #endif |
| 239 | i_pos = MSDOS_I(inode)->i_pos; |
| 240 | #if BITS_PER_LONG == 32 |
| 241 | spin_unlock(&sbi->inode_hash_lock); |
| 242 | #endif |
| 243 | return i_pos; |
| 244 | } |
| 245 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 246 | static inline void fat16_towchar(wchar_t *dst, const __u8 *src, size_t len) |
| 247 | { |
| 248 | #ifdef __BIG_ENDIAN |
| 249 | while (len--) { |
| 250 | *dst++ = src[0] | (src[1] << 8); |
| 251 | src += 2; |
| 252 | } |
| 253 | #else |
| 254 | memcpy(dst, src, len * 2); |
| 255 | #endif |
| 256 | } |
| 257 | |
Steven J. Magnani | a943ed7 | 2012-07-30 14:42:13 -0700 | [diff] [blame] | 258 | static inline int fat_get_start(const struct msdos_sb_info *sbi, |
| 259 | const struct msdos_dir_entry *de) |
| 260 | { |
| 261 | int cluster = le16_to_cpu(de->start); |
| 262 | if (sbi->fat_bits == 32) |
| 263 | cluster |= (le16_to_cpu(de->starthi) << 16); |
| 264 | return cluster; |
| 265 | } |
| 266 | |
| 267 | static inline void fat_set_start(struct msdos_dir_entry *de, int cluster) |
| 268 | { |
| 269 | de->start = cpu_to_le16(cluster); |
| 270 | de->starthi = cpu_to_le16(cluster >> 16); |
| 271 | } |
| 272 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 273 | static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) |
| 274 | { |
| 275 | #ifdef __BIG_ENDIAN |
| 276 | while (len--) { |
| 277 | dst[0] = *src & 0x00FF; |
| 278 | dst[1] = (*src & 0xFF00) >> 8; |
| 279 | dst += 2; |
| 280 | src++; |
| 281 | } |
| 282 | #else |
| 283 | memcpy(dst, src, len * 2); |
| 284 | #endif |
| 285 | } |
| 286 | |
| 287 | /* fat/cache.c */ |
| 288 | extern void fat_cache_inval_inode(struct inode *inode); |
| 289 | extern int fat_get_cluster(struct inode *inode, int cluster, |
| 290 | int *fclus, int *dclus); |
| 291 | extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys, |
OGAWA Hirofumi | 2bdf67e | 2008-11-06 12:53:57 -0800 | [diff] [blame] | 292 | unsigned long *mapped_blocks, int create); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 293 | |
| 294 | /* fat/dir.c */ |
| 295 | extern const struct file_operations fat_dir_operations; |
| 296 | extern int fat_search_long(struct inode *inode, const unsigned char *name, |
| 297 | int name_len, struct fat_slot_info *sinfo); |
| 298 | extern int fat_dir_empty(struct inode *dir); |
| 299 | extern int fat_subdirs(struct inode *dir); |
| 300 | extern int fat_scan(struct inode *dir, const unsigned char *name, |
| 301 | struct fat_slot_info *sinfo); |
Namjae Jeon | f1e6fb0 | 2013-04-29 16:21:14 -0700 | [diff] [blame] | 302 | extern int fat_scan_logstart(struct inode *dir, int i_logstart, |
| 303 | struct fat_slot_info *sinfo); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 304 | extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 305 | struct msdos_dir_entry **de); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 306 | extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); |
| 307 | extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, |
| 308 | struct fat_slot_info *sinfo); |
| 309 | extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); |
| 310 | |
| 311 | /* fat/fatent.c */ |
| 312 | struct fat_entry { |
| 313 | int entry; |
| 314 | union { |
| 315 | u8 *ent12_p[2]; |
| 316 | __le16 *ent16_p; |
| 317 | __le32 *ent32_p; |
| 318 | } u; |
| 319 | int nr_bhs; |
| 320 | struct buffer_head *bhs[2]; |
Al Viro | b522412 | 2009-06-07 13:44:36 -0400 | [diff] [blame] | 321 | struct inode *fat_inode; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 322 | }; |
| 323 | |
| 324 | static inline void fatent_init(struct fat_entry *fatent) |
| 325 | { |
| 326 | fatent->nr_bhs = 0; |
| 327 | fatent->entry = 0; |
| 328 | fatent->u.ent32_p = NULL; |
| 329 | fatent->bhs[0] = fatent->bhs[1] = NULL; |
Al Viro | b522412 | 2009-06-07 13:44:36 -0400 | [diff] [blame] | 330 | fatent->fat_inode = NULL; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | static inline void fatent_set_entry(struct fat_entry *fatent, int entry) |
| 334 | { |
| 335 | fatent->entry = entry; |
| 336 | fatent->u.ent32_p = NULL; |
| 337 | } |
| 338 | |
| 339 | static inline void fatent_brelse(struct fat_entry *fatent) |
| 340 | { |
| 341 | int i; |
| 342 | fatent->u.ent32_p = NULL; |
| 343 | for (i = 0; i < fatent->nr_bhs; i++) |
| 344 | brelse(fatent->bhs[i]); |
| 345 | fatent->nr_bhs = 0; |
| 346 | fatent->bhs[0] = fatent->bhs[1] = NULL; |
Al Viro | b522412 | 2009-06-07 13:44:36 -0400 | [diff] [blame] | 347 | fatent->fat_inode = NULL; |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | extern void fat_ent_access_init(struct super_block *sb); |
| 351 | extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent, |
| 352 | int entry); |
| 353 | extern int fat_ent_write(struct inode *inode, struct fat_entry *fatent, |
| 354 | int new, int wait); |
| 355 | extern int fat_alloc_clusters(struct inode *inode, int *cluster, |
| 356 | int nr_cluster); |
| 357 | extern int fat_free_clusters(struct inode *inode, int cluster); |
| 358 | extern int fat_count_free_clusters(struct super_block *sb); |
| 359 | |
| 360 | /* fat/file.c */ |
Arnd Bergmann | 7845bc3e | 2010-05-17 08:13:47 +0900 | [diff] [blame] | 361 | extern long fat_generic_ioctl(struct file *filp, unsigned int cmd, |
| 362 | unsigned long arg); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 363 | extern const struct file_operations fat_file_operations; |
| 364 | extern const struct inode_operations fat_file_inode_operations; |
Cruz Julian Bishop | d5a4a38 | 2012-10-04 17:14:49 -0700 | [diff] [blame] | 365 | extern int fat_setattr(struct dentry *dentry, struct iattr *attr); |
npiggin@suse.de | 459f6ed | 2010-05-27 01:05:38 +1000 | [diff] [blame] | 366 | extern void fat_truncate_blocks(struct inode *inode, loff_t offset); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 367 | extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 368 | struct kstat *stat); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 369 | extern int fat_file_fsync(struct file *file, loff_t start, loff_t end, |
| 370 | int datasync); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 371 | |
| 372 | /* fat/inode.c */ |
| 373 | extern void fat_attach(struct inode *inode, loff_t i_pos); |
| 374 | extern void fat_detach(struct inode *inode); |
| 375 | extern struct inode *fat_iget(struct super_block *sb, loff_t i_pos); |
| 376 | extern struct inode *fat_build_inode(struct super_block *sb, |
| 377 | struct msdos_dir_entry *de, loff_t i_pos); |
| 378 | extern int fat_sync_inode(struct inode *inode); |
| 379 | extern int fat_fill_super(struct super_block *sb, void *data, int silent, |
OGAWA Hirofumi | 384f5c9 | 2011-04-12 21:08:37 +0900 | [diff] [blame] | 380 | int isvfat, void (*setup)(struct super_block *)); |
Namjae Jeon | f1e6fb0 | 2013-04-29 16:21:14 -0700 | [diff] [blame] | 381 | extern int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 382 | |
| 383 | extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, |
Cruz Julian Bishop | d5a4a38 | 2012-10-04 17:14:49 -0700 | [diff] [blame] | 384 | struct inode *i2); |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 385 | static inline unsigned long fat_dir_hash(int logstart) |
Steven J. Magnani | 21b6633d5 | 2012-10-04 17:14:44 -0700 | [diff] [blame] | 386 | { |
Steven J. Magnani | 7669e8f | 2012-10-04 17:14:45 -0700 | [diff] [blame] | 387 | return hash_32(logstart, FAT_HASH_BITS); |
Steven J. Magnani | 21b6633d5 | 2012-10-04 17:14:44 -0700 | [diff] [blame] | 388 | } |
| 389 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 390 | /* fat/misc.c */ |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 391 | extern __printf(3, 4) __cold |
| 392 | void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...); |
Alexey Fisher | 2c8a5ff | 2011-04-12 21:08:38 +0900 | [diff] [blame] | 393 | #define fat_fs_error(sb, fmt, args...) \ |
| 394 | __fat_fs_error(sb, 1, fmt , ## args) |
| 395 | #define fat_fs_error_ratelimit(sb, fmt, args...) \ |
| 396 | __fat_fs_error(sb, __ratelimit(&MSDOS_SB(sb)->ratelimit), fmt , ## args) |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 397 | __printf(3, 4) __cold |
| 398 | void fat_msg(struct super_block *sb, const char *level, const char *fmt, ...); |
Namjae Jeon | b742c34 | 2012-05-31 16:26:13 -0700 | [diff] [blame] | 399 | #define fat_msg_ratelimit(sb, level, fmt, args...) \ |
| 400 | do { \ |
| 401 | if (__ratelimit(&MSDOS_SB(sb)->ratelimit)) \ |
| 402 | fat_msg(sb, level, fmt, ## args); \ |
| 403 | } while (0) |
OGAWA Hirofumi | ed248b2 | 2009-09-20 01:31:58 +0900 | [diff] [blame] | 404 | extern int fat_clusters_flush(struct super_block *sb); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 405 | extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); |
OGAWA Hirofumi | 7decd1c | 2008-11-06 12:53:47 -0800 | [diff] [blame] | 406 | extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts, |
| 407 | __le16 __time, __le16 __date, u8 time_cs); |
| 408 | extern void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts, |
| 409 | __le16 *time, __le16 *date, u8 *time_cs); |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 410 | extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); |
| 411 | |
| 412 | int fat_cache_init(void); |
| 413 | void fat_cache_destroy(void); |
| 414 | |
Steven J. Magnani | 21b6633d5 | 2012-10-04 17:14:44 -0700 | [diff] [blame] | 415 | /* fat/nfs.c */ |
Namjae Jeon | ea3983a | 2013-04-29 16:21:11 -0700 | [diff] [blame] | 416 | extern const struct export_operations fat_export_ops; |
| 417 | extern const struct export_operations fat_export_ops_nostale; |
Steven J. Magnani | 21b6633d5 | 2012-10-04 17:14:44 -0700 | [diff] [blame] | 418 | |
OGAWA Hirofumi | c330293 | 2008-11-06 12:53:58 -0800 | [diff] [blame] | 419 | /* helper for printk */ |
| 420 | typedef unsigned long long llu; |
| 421 | |
OGAWA Hirofumi | 9e975da | 2008-11-06 12:53:46 -0800 | [diff] [blame] | 422 | #endif /* !_FAT_H */ |