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1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* | |
3 | * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. | |
4 | */ | |
5 | ||
6 | #ifndef _EXFAT_FS_H | |
7 | #define _EXFAT_FS_H | |
8 | ||
9 | #include <linux/fs.h> | |
10 | #include <linux/ratelimit.h> | |
11 | #include <linux/nls.h> | |
12 | ||
13 | #define EXFAT_SUPER_MAGIC 0x2011BAB0UL | |
14 | #define EXFAT_ROOT_INO 1 | |
15 | ||
16 | #define EXFAT_SB_DIRTY 0 | |
17 | ||
18 | #define EXFAT_CLUSTERS_UNTRACKED (~0u) | |
19 | ||
20 | /* | |
21 | * exfat error flags | |
22 | */ | |
23 | enum exfat_error_mode { | |
24 | EXFAT_ERRORS_CONT, /* ignore error and continue */ | |
25 | EXFAT_ERRORS_PANIC, /* panic on error */ | |
26 | EXFAT_ERRORS_RO, /* remount r/o on error */ | |
27 | }; | |
28 | ||
29 | /* | |
30 | * exfat nls lossy flag | |
31 | */ | |
32 | enum { | |
33 | NLS_NAME_NO_LOSSY, /* no lossy */ | |
34 | NLS_NAME_LOSSY, /* just detected incorrect filename(s) */ | |
35 | NLS_NAME_OVERLEN, /* the length is over than its limit */ | |
36 | }; | |
37 | ||
38 | #define EXFAT_HASH_BITS 8 | |
39 | #define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS) | |
40 | ||
41 | /* | |
42 | * Type Definitions | |
43 | */ | |
44 | #define ES_2_ENTRIES 2 | |
45 | #define ES_ALL_ENTRIES 0 | |
46 | ||
47 | #define DIR_DELETED 0xFFFF0321 | |
48 | ||
49 | /* type values */ | |
50 | #define TYPE_UNUSED 0x0000 | |
51 | #define TYPE_DELETED 0x0001 | |
52 | #define TYPE_INVALID 0x0002 | |
53 | #define TYPE_CRITICAL_PRI 0x0100 | |
54 | #define TYPE_BITMAP 0x0101 | |
55 | #define TYPE_UPCASE 0x0102 | |
56 | #define TYPE_VOLUME 0x0103 | |
57 | #define TYPE_DIR 0x0104 | |
58 | #define TYPE_FILE 0x011F | |
59 | #define TYPE_CRITICAL_SEC 0x0200 | |
60 | #define TYPE_STREAM 0x0201 | |
61 | #define TYPE_EXTEND 0x0202 | |
62 | #define TYPE_ACL 0x0203 | |
63 | #define TYPE_BENIGN_PRI 0x0400 | |
64 | #define TYPE_GUID 0x0401 | |
65 | #define TYPE_PADDING 0x0402 | |
66 | #define TYPE_ACLTAB 0x0403 | |
67 | #define TYPE_BENIGN_SEC 0x0800 | |
68 | #define TYPE_ALL 0x0FFF | |
69 | ||
70 | #define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */ | |
71 | #define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */ | |
72 | #define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE) | |
73 | ||
74 | #define FAT_CACHE_SIZE 128 | |
75 | #define FAT_CACHE_HASH_SIZE 64 | |
76 | #define BUF_CACHE_SIZE 256 | |
77 | #define BUF_CACHE_HASH_SIZE 64 | |
78 | ||
79 | #define EXFAT_HINT_NONE -1 | |
80 | #define EXFAT_MIN_SUBDIR 2 | |
81 | ||
82 | /* | |
83 | * helpers for cluster size to byte conversion. | |
84 | */ | |
85 | #define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits) | |
86 | #define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits) | |
87 | #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \ | |
88 | (((b - 1) >> (sbi)->cluster_size_bits) + 1) | |
89 | #define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1)) | |
90 | ||
91 | /* | |
92 | * helpers for block size to byte conversion. | |
93 | */ | |
94 | #define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits) | |
95 | #define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits) | |
96 | #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \ | |
97 | (((b - 1) >> (sb)->s_blocksize_bits) + 1) | |
98 | #define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1)) | |
99 | ||
100 | /* | |
101 | * helpers for block size to dentry size conversion. | |
102 | */ | |
103 | #define EXFAT_B_TO_DEN_IDX(b, sbi) \ | |
104 | ((b) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) | |
105 | #define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS) | |
106 | #define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS) | |
107 | ||
108 | /* | |
109 | * helpers for fat entry. | |
110 | */ | |
111 | #define FAT_ENT_SIZE (4) | |
112 | #define FAT_ENT_SIZE_BITS (2) | |
113 | #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \ | |
114 | (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits)) | |
115 | #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \ | |
116 | ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1)) | |
117 | ||
118 | /* | |
119 | * helpers for bitmap. | |
120 | */ | |
121 | #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS) | |
122 | #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS) | |
123 | #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE) | |
124 | #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1) | |
125 | #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \ | |
126 | ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits) | |
127 | #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb)) | |
128 | #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \ | |
129 | ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1)) | |
130 | #define BITS_PER_BYTE_MASK 0x7 | |
131 | #define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1) | |
132 | ||
133 | struct exfat_dentry_namebuf { | |
134 | char *lfn; | |
135 | int lfnbuf_len; /* usally MAX_UNINAME_BUF_SIZE */ | |
136 | }; | |
137 | ||
138 | /* unicode name structure */ | |
139 | struct exfat_uni_name { | |
140 | /* +3 for null and for converting */ | |
141 | unsigned short name[MAX_NAME_LENGTH + 3]; | |
142 | unsigned short name_hash; | |
143 | unsigned char name_len; | |
144 | }; | |
145 | ||
146 | /* directory structure */ | |
147 | struct exfat_chain { | |
148 | unsigned int dir; | |
149 | unsigned int size; | |
150 | unsigned char flags; | |
151 | }; | |
152 | ||
153 | /* first empty entry hint information */ | |
154 | struct exfat_hint_femp { | |
155 | /* entry index of a directory */ | |
156 | int eidx; | |
157 | /* count of continuous empty entry */ | |
158 | int count; | |
159 | /* the cluster that first empty slot exists in */ | |
160 | struct exfat_chain cur; | |
161 | }; | |
162 | ||
163 | /* hint structure */ | |
164 | struct exfat_hint { | |
165 | unsigned int clu; | |
166 | union { | |
167 | unsigned int off; /* cluster offset */ | |
168 | int eidx; /* entry index */ | |
169 | }; | |
170 | }; | |
171 | ||
172 | struct exfat_entry_set_cache { | |
173 | /* sector number that contains file_entry */ | |
174 | sector_t sector; | |
175 | /* byte offset in the sector */ | |
176 | unsigned int offset; | |
177 | /* flag in stream entry. 01 for cluster chain, 03 for contig. */ | |
178 | int alloc_flag; | |
179 | unsigned int num_entries; | |
180 | struct exfat_dentry entries[]; | |
181 | }; | |
182 | ||
183 | struct exfat_dir_entry { | |
184 | struct exfat_chain dir; | |
185 | int entry; | |
186 | unsigned int type; | |
187 | unsigned int start_clu; | |
188 | unsigned char flags; | |
189 | unsigned short attr; | |
190 | loff_t size; | |
191 | unsigned int num_subdirs; | |
192 | struct timespec64 atime; | |
193 | struct timespec64 mtime; | |
194 | struct timespec64 crtime; | |
195 | struct exfat_dentry_namebuf namebuf; | |
196 | }; | |
197 | ||
198 | /* | |
199 | * exfat mount in-memory data | |
200 | */ | |
201 | struct exfat_mount_options { | |
202 | kuid_t fs_uid; | |
203 | kgid_t fs_gid; | |
204 | unsigned short fs_fmask; | |
205 | unsigned short fs_dmask; | |
206 | /* permission for setting the [am]time */ | |
207 | unsigned short allow_utime; | |
208 | /* charset for filename input/display */ | |
209 | char *iocharset; | |
210 | /* on error: continue, panic, remount-ro */ | |
211 | enum exfat_error_mode errors; | |
212 | unsigned utf8:1, /* Use of UTF-8 character set */ | |
213 | discard:1; /* Issue discard requests on deletions */ | |
214 | int time_offset; /* Offset of timestamps from UTC (in minutes) */ | |
215 | }; | |
216 | ||
217 | /* | |
218 | * EXFAT file system superblock in-memory data | |
219 | */ | |
220 | struct exfat_sb_info { | |
221 | unsigned long long num_sectors; /* num of sectors in volume */ | |
222 | unsigned int num_clusters; /* num of clusters in volume */ | |
223 | unsigned int cluster_size; /* cluster size in bytes */ | |
224 | unsigned int cluster_size_bits; | |
225 | unsigned int sect_per_clus; /* cluster size in sectors */ | |
226 | unsigned int sect_per_clus_bits; | |
227 | unsigned long long FAT1_start_sector; /* FAT1 start sector */ | |
228 | unsigned long long FAT2_start_sector; /* FAT2 start sector */ | |
229 | unsigned long long data_start_sector; /* data area start sector */ | |
230 | unsigned int num_FAT_sectors; /* num of FAT sectors */ | |
231 | unsigned int root_dir; /* root dir cluster */ | |
232 | unsigned int dentries_per_clu; /* num of dentries per cluster */ | |
233 | unsigned int vol_flag; /* volume dirty flag */ | |
234 | struct buffer_head *pbr_bh; /* buffer_head of PBR sector */ | |
235 | ||
236 | unsigned int map_clu; /* allocation bitmap start cluster */ | |
237 | unsigned int map_sectors; /* num of allocation bitmap sectors */ | |
238 | struct buffer_head **vol_amap; /* allocation bitmap */ | |
239 | ||
240 | unsigned short *vol_utbl; /* upcase table */ | |
241 | ||
242 | unsigned int clu_srch_ptr; /* cluster search pointer */ | |
243 | unsigned int used_clusters; /* number of used clusters */ | |
244 | ||
245 | unsigned long s_state; | |
246 | struct mutex s_lock; /* superblock lock */ | |
247 | struct exfat_mount_options options; | |
248 | struct nls_table *nls_io; /* Charset used for input and display */ | |
249 | struct ratelimit_state ratelimit; | |
250 | ||
251 | spinlock_t inode_hash_lock; | |
252 | struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; | |
253 | ||
254 | struct rcu_head rcu; | |
255 | }; | |
256 | ||
257 | /* | |
258 | * EXFAT file system inode in-memory data | |
259 | */ | |
260 | struct exfat_inode_info { | |
261 | struct exfat_chain dir; | |
262 | int entry; | |
263 | unsigned int type; | |
264 | unsigned short attr; | |
265 | unsigned int start_clu; | |
266 | unsigned char flags; | |
267 | /* | |
268 | * the copy of low 32bit of i_version to check | |
269 | * the validation of hint_stat. | |
270 | */ | |
271 | unsigned int version; | |
272 | /* file offset or dentry index for readdir */ | |
273 | loff_t rwoffset; | |
274 | ||
275 | /* hint for cluster last accessed */ | |
276 | struct exfat_hint hint_bmap; | |
277 | /* hint for entry index we try to lookup next time */ | |
278 | struct exfat_hint hint_stat; | |
279 | /* hint for first empty entry */ | |
280 | struct exfat_hint_femp hint_femp; | |
281 | ||
282 | spinlock_t cache_lru_lock; | |
283 | struct list_head cache_lru; | |
284 | int nr_caches; | |
285 | /* for avoiding the race between alloc and free */ | |
286 | unsigned int cache_valid_id; | |
287 | ||
288 | /* | |
289 | * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access. | |
290 | * physically allocated size. | |
291 | */ | |
292 | loff_t i_size_ondisk; | |
293 | /* block-aligned i_size (used in cont_write_begin) */ | |
294 | loff_t i_size_aligned; | |
295 | /* on-disk position of directory entry or 0 */ | |
296 | loff_t i_pos; | |
297 | /* hash by i_location */ | |
298 | struct hlist_node i_hash_fat; | |
299 | /* protect bmap against truncate */ | |
300 | struct rw_semaphore truncate_lock; | |
301 | struct inode vfs_inode; | |
302 | /* File creation time */ | |
303 | struct timespec64 i_crtime; | |
304 | }; | |
305 | ||
306 | static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) | |
307 | { | |
308 | return sb->s_fs_info; | |
309 | } | |
310 | ||
311 | static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) | |
312 | { | |
313 | return container_of(inode, struct exfat_inode_info, vfs_inode); | |
314 | } | |
315 | ||
316 | /* | |
317 | * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to | |
318 | * save ATTR_RO instead of ->i_mode. | |
319 | * | |
320 | * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only | |
321 | * bit, it's just used as flag for app. | |
322 | */ | |
323 | static inline int exfat_mode_can_hold_ro(struct inode *inode) | |
324 | { | |
325 | struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); | |
326 | ||
327 | if (S_ISDIR(inode->i_mode)) | |
328 | return 0; | |
329 | ||
330 | if ((~sbi->options.fs_fmask) & 0222) | |
331 | return 1; | |
332 | return 0; | |
333 | } | |
334 | ||
335 | /* Convert attribute bits and a mask to the UNIX mode. */ | |
336 | static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, | |
337 | unsigned short attr, mode_t mode) | |
338 | { | |
339 | if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR)) | |
340 | mode &= ~0222; | |
341 | ||
342 | if (attr & ATTR_SUBDIR) | |
343 | return (mode & ~sbi->options.fs_dmask) | S_IFDIR; | |
344 | ||
345 | return (mode & ~sbi->options.fs_fmask) | S_IFREG; | |
346 | } | |
347 | ||
348 | /* Return the FAT attribute byte for this inode */ | |
349 | static inline unsigned short exfat_make_attr(struct inode *inode) | |
350 | { | |
351 | unsigned short attr = EXFAT_I(inode)->attr; | |
352 | ||
353 | if (S_ISDIR(inode->i_mode)) | |
354 | attr |= ATTR_SUBDIR; | |
355 | if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) | |
356 | attr |= ATTR_READONLY; | |
357 | return attr; | |
358 | } | |
359 | ||
360 | static inline void exfat_save_attr(struct inode *inode, unsigned short attr) | |
361 | { | |
362 | if (exfat_mode_can_hold_ro(inode)) | |
363 | EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY); | |
364 | else | |
365 | EXFAT_I(inode)->attr = attr & ATTR_RWMASK; | |
366 | } | |
367 | ||
368 | static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, | |
369 | sector_t sec) | |
370 | { | |
371 | return ((sec - sbi->data_start_sector + 1) & | |
372 | ((1 << sbi->sect_per_clus_bits) - 1)) == 0; | |
373 | } | |
374 | ||
375 | static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, | |
376 | unsigned int clus) | |
377 | { | |
378 | return ((clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + | |
379 | sbi->data_start_sector; | |
380 | } | |
381 | ||
382 | static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, | |
383 | sector_t sec) | |
384 | { | |
385 | return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + | |
386 | EXFAT_RESERVED_CLUSTERS; | |
387 | } | |
388 | ||
389 | /* super.c */ | |
390 | int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flag); | |
391 | ||
392 | /* fatent.c */ | |
393 | #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) | |
394 | ||
395 | int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, | |
396 | struct exfat_chain *p_chain); | |
397 | int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); | |
398 | int exfat_ent_get(struct super_block *sb, unsigned int loc, | |
399 | unsigned int *content); | |
400 | int exfat_ent_set(struct super_block *sb, unsigned int loc, | |
401 | unsigned int content); | |
402 | int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, | |
403 | int entry, struct exfat_dentry *p_entry); | |
404 | int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, | |
405 | unsigned int len); | |
406 | int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); | |
407 | int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, | |
408 | unsigned int *ret_clu); | |
409 | int exfat_count_num_clusters(struct super_block *sb, | |
410 | struct exfat_chain *p_chain, unsigned int *ret_count); | |
411 | ||
412 | /* balloc.c */ | |
413 | int exfat_load_bitmap(struct super_block *sb); | |
414 | void exfat_free_bitmap(struct exfat_sb_info *sbi); | |
415 | int exfat_set_bitmap(struct inode *inode, unsigned int clu); | |
416 | void exfat_clear_bitmap(struct inode *inode, unsigned int clu); | |
417 | unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); | |
418 | int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); | |
419 | ||
420 | /* file.c */ | |
421 | extern const struct file_operations exfat_file_operations; | |
422 | int __exfat_truncate(struct inode *inode, loff_t new_size); | |
423 | void exfat_truncate(struct inode *inode, loff_t size); | |
424 | int exfat_setattr(struct dentry *dentry, struct iattr *attr); | |
425 | int exfat_getattr(const struct path *path, struct kstat *stat, | |
426 | unsigned int request_mask, unsigned int query_flags); | |
427 | ||
428 | /* namei.c */ | |
429 | extern const struct dentry_operations exfat_dentry_ops; | |
430 | extern const struct dentry_operations exfat_utf8_dentry_ops; | |
431 | ||
432 | /* cache.c */ | |
433 | int exfat_cache_init(void); | |
434 | void exfat_cache_shutdown(void); | |
435 | void exfat_cache_init_inode(struct inode *inode); | |
436 | void exfat_cache_inval_inode(struct inode *inode); | |
437 | int exfat_get_cluster(struct inode *inode, unsigned int cluster, | |
438 | unsigned int *fclus, unsigned int *dclus, | |
439 | unsigned int *last_dclus, int allow_eof); | |
440 | ||
441 | /* dir.c */ | |
442 | extern const struct inode_operations exfat_dir_inode_operations; | |
443 | extern const struct file_operations exfat_dir_operations; | |
444 | unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); | |
445 | int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, | |
446 | int entry, unsigned int type, unsigned int start_clu, | |
447 | unsigned long long size); | |
448 | int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, | |
449 | int entry, int num_entries, struct exfat_uni_name *p_uniname); | |
450 | int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, | |
451 | int entry, int order, int num_entries); | |
452 | int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, | |
453 | int entry); | |
454 | int exfat_update_dir_chksum_with_entry_set(struct super_block *sb, | |
455 | struct exfat_entry_set_cache *es, int sync); | |
456 | int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); | |
457 | int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, | |
458 | struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, | |
459 | int num_entries, unsigned int type); | |
460 | int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); | |
461 | int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir, | |
462 | int entry, sector_t *sector, int *offset); | |
463 | struct exfat_dentry *exfat_get_dentry(struct super_block *sb, | |
464 | struct exfat_chain *p_dir, int entry, struct buffer_head **bh, | |
465 | sector_t *sector); | |
466 | struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb, | |
467 | struct exfat_chain *p_dir, int entry, unsigned int type, | |
468 | struct exfat_dentry **file_ep); | |
469 | int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); | |
470 | ||
471 | /* inode.c */ | |
472 | extern const struct inode_operations exfat_file_inode_operations; | |
473 | void exfat_sync_inode(struct inode *inode); | |
474 | struct inode *exfat_build_inode(struct super_block *sb, | |
475 | struct exfat_dir_entry *info, loff_t i_pos); | |
476 | void exfat_hash_inode(struct inode *inode, loff_t i_pos); | |
477 | void exfat_unhash_inode(struct inode *inode); | |
478 | struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); | |
479 | int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); | |
480 | void exfat_evict_inode(struct inode *inode); | |
481 | int exfat_block_truncate_page(struct inode *inode, loff_t from); | |
482 | ||
483 | /* exfat/nls.c */ | |
484 | unsigned short exfat_toupper(struct super_block *sb, unsigned short a); | |
485 | int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, | |
486 | unsigned short *b, unsigned int len); | |
487 | int exfat_utf16_to_nls(struct super_block *sb, | |
488 | struct exfat_uni_name *uniname, unsigned char *p_cstring, | |
489 | int len); | |
490 | int exfat_nls_to_utf16(struct super_block *sb, | |
491 | const unsigned char *p_cstring, const int len, | |
492 | struct exfat_uni_name *uniname, int *p_lossy); | |
493 | int exfat_create_upcase_table(struct super_block *sb); | |
494 | void exfat_free_upcase_table(struct exfat_sb_info *sbi); | |
495 | unsigned short exfat_high_surrogate(unicode_t u); | |
496 | unsigned short exfat_low_surrogate(unicode_t u); | |
497 | ||
498 | /* exfat/misc.c */ | |
499 | void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) | |
500 | __printf(3, 4) __cold; | |
501 | #define exfat_fs_error(sb, fmt, args...) \ | |
502 | __exfat_fs_error(sb, 1, fmt, ## args) | |
503 | #define exfat_fs_error_ratelimit(sb, fmt, args...) \ | |
504 | __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ | |
505 | fmt, ## args) | |
506 | void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...) | |
507 | __printf(3, 4) __cold; | |
508 | void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, | |
509 | u8 tz, __le16 time, __le16 date, u8 time_ms); | |
81df1ad4 | 510 | void exfat_truncate_atime(struct timespec64 *ts); |
1acf1a56 NJ |
511 | void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, |
512 | u8 *tz, __le16 *time, __le16 *date, u8 *time_ms); | |
513 | unsigned short exfat_calc_chksum_2byte(void *data, int len, | |
514 | unsigned short chksum, int type); | |
515 | void exfat_update_bh(struct super_block *sb, struct buffer_head *bh, int sync); | |
516 | void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, | |
517 | unsigned int size, unsigned char flags); | |
518 | void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); | |
519 | ||
520 | #endif /* !_EXFAT_FS_H */ |