Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
9e975dae OH |
2 | #ifndef _FAT_H |
3 | #define _FAT_H | |
4 | ||
5 | #include <linux/buffer_head.h> | |
9e975dae | 6 | #include <linux/nls.h> |
7669e8fb | 7 | #include <linux/hash.h> |
aaa04b48 | 8 | #include <linux/ratelimit.h> |
9e975dae OH |
9 | #include <linux/msdos_fs.h> |
10 | ||
11 | /* | |
12 | * vfat shortname flags | |
13 | */ | |
14 | #define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase for display */ | |
15 | #define VFAT_SFN_DISPLAY_WIN95 0x0002 /* emulate win95 rule for display */ | |
16 | #define VFAT_SFN_DISPLAY_WINNT 0x0004 /* emulate winnt rule for display */ | |
17 | #define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */ | |
18 | #define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */ | |
19 | ||
85c78591 DK |
20 | #define FAT_ERRORS_CONT 1 /* ignore error and continue */ |
21 | #define FAT_ERRORS_PANIC 2 /* panic on error */ | |
22 | #define FAT_ERRORS_RO 3 /* remount r/o on error */ | |
23 | ||
2628b7a6 NJ |
24 | #define FAT_NFS_STALE_RW 1 /* NFS RW support, can cause ESTALE */ |
25 | #define FAT_NFS_NOSTALE_RO 2 /* NFS RO support, no ESTALE issue */ | |
26 | ||
9e975dae | 27 | struct fat_mount_options { |
170782eb EB |
28 | kuid_t fs_uid; |
29 | kgid_t fs_gid; | |
9e975dae OH |
30 | unsigned short fs_fmask; |
31 | unsigned short fs_dmask; | |
4a3aeb13 | 32 | unsigned short codepage; /* Codepage for shortname conversions */ |
58156c8f | 33 | int time_offset; /* Offset of timestamps from UTC (in minutes) */ |
4a3aeb13 CJB |
34 | char *iocharset; /* Charset used for filename input/display */ |
35 | unsigned short shortname; /* flags for shortname display/create rule */ | |
36 | unsigned char name_check; /* r = relaxed, n = normal, s = strict */ | |
37 | unsigned char errors; /* On error: continue, panic, remount-ro */ | |
2628b7a6 | 38 | unsigned char nfs; /* NFS support: nostale_ro, stale_rw */ |
9e975dae | 39 | unsigned short allow_utime;/* permission for setting the [am]time */ |
4a3aeb13 CJB |
40 | unsigned quiet:1, /* set = fake successful chmods and chowns */ |
41 | showexec:1, /* set = only set x bit for com/exe/bat */ | |
42 | sys_immutable:1, /* set = system files are immutable */ | |
43 | dotsOK:1, /* set = hidden and system files are named '.filename' */ | |
44 | isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ | |
45 | utf8:1, /* Use of UTF-8 character set (Default) */ | |
46 | unicode_xlate:1, /* create escape sequences for unhandled Unicode */ | |
47 | numtail:1, /* Does first alias have a numeric '~1' type tail? */ | |
48 | flush:1, /* write things quickly */ | |
49 | nocase:1, /* Does this need case conversion? 0=need case conversion*/ | |
50 | usefree:1, /* Use free_clusters for FAT32 */ | |
58156c8f | 51 | tz_set:1, /* Filesystem timestamps' offset set */ |
4a3aeb13 | 52 | rodir:1, /* allow ATTR_RO for directory */ |
190a8843 CM |
53 | discard:1, /* Issue discard requests on deletions */ |
54 | dos1xfloppy:1; /* Assume default BPB for DOS 1.x floppies */ | |
9e975dae OH |
55 | }; |
56 | ||
57 | #define FAT_HASH_BITS 8 | |
58 | #define FAT_HASH_SIZE (1UL << FAT_HASH_BITS) | |
9e975dae OH |
59 | |
60 | /* | |
61 | * MS-DOS file system in-core superblock data | |
62 | */ | |
63 | struct msdos_sb_info { | |
4a3aeb13 CJB |
64 | unsigned short sec_per_clus; /* sectors/cluster */ |
65 | unsigned short cluster_bits; /* log2(cluster_size) */ | |
66 | unsigned int cluster_size; /* cluster size */ | |
8de560de | 67 | unsigned char fats, fat_bits; /* number of FATs, FAT bits (12,16 or 32) */ |
9e975dae | 68 | unsigned short fat_start; |
4a3aeb13 | 69 | unsigned long fat_length; /* FAT start & length (sec.) */ |
9e975dae | 70 | unsigned long dir_start; |
4a3aeb13 CJB |
71 | unsigned short dir_entries; /* root dir start & entries */ |
72 | unsigned long data_start; /* first data sector */ | |
73 | unsigned long max_cluster; /* maximum cluster number */ | |
74 | unsigned long root_cluster; /* first cluster of the root directory */ | |
75 | unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ | |
9e975dae | 76 | struct mutex fat_lock; |
8fceb4e0 | 77 | struct mutex nfs_build_inode_lock; |
e40b34c7 MS |
78 | struct mutex s_lock; |
79 | unsigned int prev_free; /* previously allocated cluster number */ | |
80 | unsigned int free_clusters; /* -1 if undefined */ | |
9e975dae OH |
81 | unsigned int free_clus_valid; /* is free_clusters valid? */ |
82 | struct fat_mount_options options; | |
4a3aeb13 CJB |
83 | struct nls_table *nls_disk; /* Codepage used on disk */ |
84 | struct nls_table *nls_io; /* Charset used for input and display */ | |
85 | const void *dir_ops; /* Opaque; default directory operations */ | |
86 | int dir_per_block; /* dir entries per block */ | |
87 | int dir_per_block_bits; /* log2(dir_per_block) */ | |
6e5b93ee | 88 | unsigned int vol_id; /*volume ID*/ |
9e975dae OH |
89 | |
90 | int fatent_shift; | |
8992de4c | 91 | const struct fatent_operations *fatent_ops; |
b522412a | 92 | struct inode *fat_inode; |
020ac5b6 | 93 | struct inode *fsinfo_inode; |
9e975dae | 94 | |
aaa04b48 OH |
95 | struct ratelimit_state ratelimit; |
96 | ||
9e975dae OH |
97 | spinlock_t inode_hash_lock; |
98 | struct hlist_head inode_hashtable[FAT_HASH_SIZE]; | |
7669e8fb SM |
99 | |
100 | spinlock_t dir_hash_lock; | |
101 | struct hlist_head dir_hashtable[FAT_HASH_SIZE]; | |
b88a1058 OR |
102 | |
103 | unsigned int dirty; /* fs state before mount */ | |
cac45b06 | 104 | struct rcu_head rcu; |
9e975dae OH |
105 | }; |
106 | ||
107 | #define FAT_CACHE_VALID 0 /* special case for valid cache */ | |
108 | ||
109 | /* | |
110 | * MS-DOS file system inode data in memory | |
111 | */ | |
112 | struct msdos_inode_info { | |
113 | spinlock_t cache_lru_lock; | |
114 | struct list_head cache_lru; | |
115 | int nr_caches; | |
116 | /* for avoiding the race between fat_free() and fat_get_cluster() */ | |
117 | unsigned int cache_valid_id; | |
118 | ||
2bdf67eb OH |
119 | /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */ |
120 | loff_t mmu_private; /* physically allocated size */ | |
121 | ||
9e975dae OH |
122 | int i_start; /* first cluster or 0 */ |
123 | int i_logstart; /* logical first cluster */ | |
124 | int i_attrs; /* unused attribute bits */ | |
125 | loff_t i_pos; /* on-disk position of directory entry or 0 */ | |
126 | struct hlist_node i_fat_hash; /* hash by i_location */ | |
7669e8fb | 127 | struct hlist_node i_dir_hash; /* hash by i_logstart */ |
58268691 | 128 | struct rw_semaphore truncate_lock; /* protect bmap against truncate */ |
30abce05 | 129 | struct timespec64 i_crtime; /* File creation (birth) time */ |
9e975dae OH |
130 | struct inode vfs_inode; |
131 | }; | |
132 | ||
133 | struct fat_slot_info { | |
134 | loff_t i_pos; /* on-disk position of directory entry */ | |
135 | loff_t slot_off; /* offset for slot or de start */ | |
136 | int nr_slots; /* number of slots + 1(de) in filename */ | |
137 | struct msdos_dir_entry *de; | |
138 | struct buffer_head *bh; | |
139 | }; | |
140 | ||
141 | static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb) | |
142 | { | |
143 | return sb->s_fs_info; | |
144 | } | |
145 | ||
306790f7 CT |
146 | /* |
147 | * Functions that determine the variant of the FAT file system (i.e., | |
148 | * whether this is FAT12, FAT16 or FAT32. | |
149 | */ | |
150 | static inline bool is_fat12(const struct msdos_sb_info *sbi) | |
151 | { | |
152 | return sbi->fat_bits == 12; | |
153 | } | |
154 | ||
155 | static inline bool is_fat16(const struct msdos_sb_info *sbi) | |
156 | { | |
157 | return sbi->fat_bits == 16; | |
158 | } | |
159 | ||
160 | static inline bool is_fat32(const struct msdos_sb_info *sbi) | |
161 | { | |
162 | return sbi->fat_bits == 32; | |
163 | } | |
164 | ||
d19dc016 CT |
165 | /* Maximum number of clusters */ |
166 | static inline u32 max_fat(struct super_block *sb) | |
167 | { | |
168 | struct msdos_sb_info *sbi = MSDOS_SB(sb); | |
169 | ||
306790f7 CT |
170 | return is_fat32(sbi) ? MAX_FAT32 : |
171 | is_fat16(sbi) ? MAX_FAT16 : MAX_FAT12; | |
d19dc016 CT |
172 | } |
173 | ||
9e975dae OH |
174 | static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) |
175 | { | |
176 | return container_of(inode, struct msdos_inode_info, vfs_inode); | |
177 | } | |
178 | ||
9183482f OH |
179 | /* |
180 | * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to | |
181 | * save ATTR_RO instead of ->i_mode. | |
dfc209c0 OH |
182 | * |
183 | * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only | |
184 | * bit, it's just used as flag for app. | |
9183482f OH |
185 | */ |
186 | static inline int fat_mode_can_hold_ro(struct inode *inode) | |
187 | { | |
188 | struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); | |
dacd0e7b | 189 | umode_t mask; |
9183482f | 190 | |
dfc209c0 OH |
191 | if (S_ISDIR(inode->i_mode)) { |
192 | if (!sbi->options.rodir) | |
193 | return 0; | |
9183482f | 194 | mask = ~sbi->options.fs_dmask; |
dfc209c0 | 195 | } else |
9183482f OH |
196 | mask = ~sbi->options.fs_fmask; |
197 | ||
198 | if (!(mask & S_IWUGO)) | |
199 | return 0; | |
200 | return 1; | |
201 | } | |
202 | ||
9c0aa1b8 | 203 | /* Convert attribute bits and a mask to the UNIX mode. */ |
dacd0e7b AV |
204 | static inline umode_t fat_make_mode(struct msdos_sb_info *sbi, |
205 | u8 attrs, umode_t mode) | |
9c0aa1b8 | 206 | { |
dfc209c0 | 207 | if (attrs & ATTR_RO && !((attrs & ATTR_DIR) && !sbi->options.rodir)) |
9c0aa1b8 OH |
208 | mode &= ~S_IWUGO; |
209 | ||
210 | if (attrs & ATTR_DIR) | |
211 | return (mode & ~sbi->options.fs_dmask) | S_IFDIR; | |
212 | else | |
213 | return (mode & ~sbi->options.fs_fmask) | S_IFREG; | |
214 | } | |
215 | ||
9e975dae | 216 | /* Return the FAT attribute byte for this inode */ |
9c0aa1b8 | 217 | static inline u8 fat_make_attrs(struct inode *inode) |
9e975dae | 218 | { |
9183482f OH |
219 | u8 attrs = MSDOS_I(inode)->i_attrs; |
220 | if (S_ISDIR(inode->i_mode)) | |
221 | attrs |= ATTR_DIR; | |
222 | if (fat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO)) | |
223 | attrs |= ATTR_RO; | |
224 | return attrs; | |
9e975dae OH |
225 | } |
226 | ||
9c0aa1b8 OH |
227 | static inline void fat_save_attrs(struct inode *inode, u8 attrs) |
228 | { | |
9183482f OH |
229 | if (fat_mode_can_hold_ro(inode)) |
230 | MSDOS_I(inode)->i_attrs = attrs & ATTR_UNUSED; | |
231 | else | |
232 | MSDOS_I(inode)->i_attrs = attrs & (ATTR_UNUSED | ATTR_RO); | |
9c0aa1b8 OH |
233 | } |
234 | ||
9e975dae OH |
235 | static inline unsigned char fat_checksum(const __u8 *name) |
236 | { | |
237 | unsigned char s = name[0]; | |
238 | s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2]; | |
239 | s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4]; | |
240 | s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6]; | |
241 | s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8]; | |
242 | s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10]; | |
243 | return s; | |
244 | } | |
245 | ||
246 | static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus) | |
247 | { | |
248 | return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus | |
249 | + sbi->data_start; | |
250 | } | |
251 | ||
e22a4442 NJ |
252 | static inline void fat_get_blknr_offset(struct msdos_sb_info *sbi, |
253 | loff_t i_pos, sector_t *blknr, int *offset) | |
254 | { | |
255 | *blknr = i_pos >> sbi->dir_per_block_bits; | |
256 | *offset = i_pos & (sbi->dir_per_block - 1); | |
257 | } | |
258 | ||
f21735d5 NJ |
259 | static inline loff_t fat_i_pos_read(struct msdos_sb_info *sbi, |
260 | struct inode *inode) | |
261 | { | |
262 | loff_t i_pos; | |
263 | #if BITS_PER_LONG == 32 | |
264 | spin_lock(&sbi->inode_hash_lock); | |
265 | #endif | |
266 | i_pos = MSDOS_I(inode)->i_pos; | |
267 | #if BITS_PER_LONG == 32 | |
268 | spin_unlock(&sbi->inode_hash_lock); | |
269 | #endif | |
270 | return i_pos; | |
271 | } | |
272 | ||
9e975dae OH |
273 | static inline void fat16_towchar(wchar_t *dst, const __u8 *src, size_t len) |
274 | { | |
275 | #ifdef __BIG_ENDIAN | |
276 | while (len--) { | |
277 | *dst++ = src[0] | (src[1] << 8); | |
278 | src += 2; | |
279 | } | |
280 | #else | |
281 | memcpy(dst, src, len * 2); | |
282 | #endif | |
283 | } | |
284 | ||
a943ed71 SM |
285 | static inline int fat_get_start(const struct msdos_sb_info *sbi, |
286 | const struct msdos_dir_entry *de) | |
287 | { | |
288 | int cluster = le16_to_cpu(de->start); | |
306790f7 | 289 | if (is_fat32(sbi)) |
a943ed71 SM |
290 | cluster |= (le16_to_cpu(de->starthi) << 16); |
291 | return cluster; | |
292 | } | |
293 | ||
294 | static inline void fat_set_start(struct msdos_dir_entry *de, int cluster) | |
295 | { | |
296 | de->start = cpu_to_le16(cluster); | |
297 | de->starthi = cpu_to_le16(cluster >> 16); | |
298 | } | |
299 | ||
9e975dae OH |
300 | static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) |
301 | { | |
302 | #ifdef __BIG_ENDIAN | |
303 | while (len--) { | |
304 | dst[0] = *src & 0x00FF; | |
305 | dst[1] = (*src & 0xFF00) >> 8; | |
306 | dst += 2; | |
307 | src++; | |
308 | } | |
309 | #else | |
310 | memcpy(dst, src, len * 2); | |
311 | #endif | |
312 | } | |
313 | ||
314 | /* fat/cache.c */ | |
315 | extern void fat_cache_inval_inode(struct inode *inode); | |
316 | extern int fat_get_cluster(struct inode *inode, int cluster, | |
317 | int *fclus, int *dclus); | |
16fab201 NJ |
318 | extern int fat_get_mapped_cluster(struct inode *inode, sector_t sector, |
319 | sector_t last_block, | |
320 | unsigned long *mapped_blocks, sector_t *bmap); | |
9e975dae | 321 | extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys, |
16fab201 | 322 | unsigned long *mapped_blocks, int create, bool from_bmap); |
9e975dae OH |
323 | |
324 | /* fat/dir.c */ | |
325 | extern const struct file_operations fat_dir_operations; | |
326 | extern int fat_search_long(struct inode *inode, const unsigned char *name, | |
327 | int name_len, struct fat_slot_info *sinfo); | |
328 | extern int fat_dir_empty(struct inode *dir); | |
329 | extern int fat_subdirs(struct inode *dir); | |
330 | extern int fat_scan(struct inode *dir, const unsigned char *name, | |
331 | struct fat_slot_info *sinfo); | |
f1e6fb0a NJ |
332 | extern int fat_scan_logstart(struct inode *dir, int i_logstart, |
333 | struct fat_slot_info *sinfo); | |
9e975dae | 334 | extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, |
7669e8fb | 335 | struct msdos_dir_entry **de); |
f423420c | 336 | extern int fat_alloc_new_dir(struct inode *dir, struct timespec64 *ts); |
9e975dae OH |
337 | extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, |
338 | struct fat_slot_info *sinfo); | |
339 | extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); | |
340 | ||
341 | /* fat/fatent.c */ | |
342 | struct fat_entry { | |
343 | int entry; | |
344 | union { | |
345 | u8 *ent12_p[2]; | |
346 | __le16 *ent16_p; | |
347 | __le32 *ent32_p; | |
348 | } u; | |
349 | int nr_bhs; | |
350 | struct buffer_head *bhs[2]; | |
b522412a | 351 | struct inode *fat_inode; |
9e975dae OH |
352 | }; |
353 | ||
354 | static inline void fatent_init(struct fat_entry *fatent) | |
355 | { | |
356 | fatent->nr_bhs = 0; | |
357 | fatent->entry = 0; | |
358 | fatent->u.ent32_p = NULL; | |
359 | fatent->bhs[0] = fatent->bhs[1] = NULL; | |
b522412a | 360 | fatent->fat_inode = NULL; |
9e975dae OH |
361 | } |
362 | ||
363 | static inline void fatent_set_entry(struct fat_entry *fatent, int entry) | |
364 | { | |
365 | fatent->entry = entry; | |
366 | fatent->u.ent32_p = NULL; | |
367 | } | |
368 | ||
369 | static inline void fatent_brelse(struct fat_entry *fatent) | |
370 | { | |
371 | int i; | |
372 | fatent->u.ent32_p = NULL; | |
373 | for (i = 0; i < fatent->nr_bhs; i++) | |
374 | brelse(fatent->bhs[i]); | |
375 | fatent->nr_bhs = 0; | |
376 | fatent->bhs[0] = fatent->bhs[1] = NULL; | |
b522412a | 377 | fatent->fat_inode = NULL; |
9e975dae OH |
378 | } |
379 | ||
0afa9626 OH |
380 | static inline bool fat_valid_entry(struct msdos_sb_info *sbi, int entry) |
381 | { | |
382 | return FAT_START_ENT <= entry && entry < sbi->max_cluster; | |
383 | } | |
384 | ||
9e975dae OH |
385 | extern void fat_ent_access_init(struct super_block *sb); |
386 | extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent, | |
387 | int entry); | |
388 | extern int fat_ent_write(struct inode *inode, struct fat_entry *fatent, | |
389 | int new, int wait); | |
390 | extern int fat_alloc_clusters(struct inode *inode, int *cluster, | |
391 | int nr_cluster); | |
392 | extern int fat_free_clusters(struct inode *inode, int cluster); | |
393 | extern int fat_count_free_clusters(struct super_block *sb); | |
f663b5b3 | 394 | extern int fat_trim_fs(struct inode *inode, struct fstrim_range *range); |
9e975dae OH |
395 | |
396 | /* fat/file.c */ | |
7845bc3e AB |
397 | extern long fat_generic_ioctl(struct file *filp, unsigned int cmd, |
398 | unsigned long arg); | |
9e975dae OH |
399 | extern const struct file_operations fat_file_operations; |
400 | extern const struct inode_operations fat_file_inode_operations; | |
c1632a0f | 401 | extern int fat_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 402 | struct iattr *attr); |
459f6ed3 | 403 | extern void fat_truncate_blocks(struct inode *inode, loff_t offset); |
b74d24f7 | 404 | extern int fat_getattr(struct mnt_idmap *idmap, |
549c7297 | 405 | const struct path *path, struct kstat *stat, |
a528d35e | 406 | u32 request_mask, unsigned int flags); |
02c24a82 JB |
407 | extern int fat_file_fsync(struct file *file, loff_t start, loff_t end, |
408 | int datasync); | |
9e975dae OH |
409 | |
410 | /* fat/inode.c */ | |
c0ef0cc9 | 411 | extern int fat_block_truncate_page(struct inode *inode, loff_t from); |
9e975dae OH |
412 | extern void fat_attach(struct inode *inode, loff_t i_pos); |
413 | extern void fat_detach(struct inode *inode); | |
414 | extern struct inode *fat_iget(struct super_block *sb, loff_t i_pos); | |
415 | extern struct inode *fat_build_inode(struct super_block *sb, | |
416 | struct msdos_dir_entry *de, loff_t i_pos); | |
417 | extern int fat_sync_inode(struct inode *inode); | |
418 | extern int fat_fill_super(struct super_block *sb, void *data, int silent, | |
384f5c96 | 419 | int isvfat, void (*setup)(struct super_block *)); |
f1e6fb0a | 420 | extern int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de); |
9e975dae OH |
421 | |
422 | extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, | |
d5a4a386 | 423 | struct inode *i2); |
7669e8fb | 424 | static inline unsigned long fat_dir_hash(int logstart) |
21b6633d | 425 | { |
7669e8fb | 426 | return hash_32(logstart, FAT_HASH_BITS); |
21b6633d | 427 | } |
b13bb33e | 428 | extern int fat_add_cluster(struct inode *inode); |
21b6633d | 429 | |
9e975dae | 430 | /* fat/misc.c */ |
b9075fa9 JP |
431 | extern __printf(3, 4) __cold |
432 | void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...); | |
2c8a5ffb AF |
433 | #define fat_fs_error(sb, fmt, args...) \ |
434 | __fat_fs_error(sb, 1, fmt , ## args) | |
435 | #define fat_fs_error_ratelimit(sb, fmt, args...) \ | |
436 | __fat_fs_error(sb, __ratelimit(&MSDOS_SB(sb)->ratelimit), fmt , ## args) | |
e057aaec JL |
437 | |
438 | #define FAT_PRINTK_PREFIX "%sFAT-fs (%s): " | |
439 | #define fat_msg(sb, level, fmt, args...) \ | |
440 | do { \ | |
441 | printk_index_subsys_emit(FAT_PRINTK_PREFIX, level, fmt, ##args);\ | |
442 | _fat_msg(sb, level, fmt, ##args); \ | |
443 | } while (0) | |
b9075fa9 | 444 | __printf(3, 4) __cold |
e057aaec | 445 | void _fat_msg(struct super_block *sb, const char *level, const char *fmt, ...); |
b742c341 NJ |
446 | #define fat_msg_ratelimit(sb, level, fmt, args...) \ |
447 | do { \ | |
448 | if (__ratelimit(&MSDOS_SB(sb)->ratelimit)) \ | |
449 | fat_msg(sb, level, fmt, ## args); \ | |
450 | } while (0) | |
ed248b29 | 451 | extern int fat_clusters_flush(struct super_block *sb); |
9e975dae | 452 | extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); |
f423420c | 453 | extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts, |
7decd1cb | 454 | __le16 __time, __le16 __date, u8 time_cs); |
f423420c | 455 | extern void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts, |
7decd1cb | 456 | __le16 *time, __le16 *date, u8 *time_cs); |
4dcc3f96 CCC |
457 | extern struct timespec64 fat_truncate_atime(const struct msdos_sb_info *sbi, |
458 | const struct timespec64 *ts); | |
4dcc3f96 CCC |
459 | extern struct timespec64 fat_truncate_mtime(const struct msdos_sb_info *sbi, |
460 | const struct timespec64 *ts); | |
6bb885ec FS |
461 | extern int fat_truncate_time(struct inode *inode, struct timespec64 *now, |
462 | int flags); | |
913e9928 | 463 | extern int fat_update_time(struct inode *inode, int flags); |
9e975dae OH |
464 | extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); |
465 | ||
466 | int fat_cache_init(void); | |
467 | void fat_cache_destroy(void); | |
468 | ||
21b6633d | 469 | /* fat/nfs.c */ |
ea3983ac NJ |
470 | extern const struct export_operations fat_export_ops; |
471 | extern const struct export_operations fat_export_ops_nostale; | |
21b6633d | 472 | |
c3302931 OH |
473 | /* helper for printk */ |
474 | typedef unsigned long long llu; | |
475 | ||
9e975dae | 476 | #endif /* !_FAT_H */ |