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 | #include <linux/blkdev.h> |
13 | |
14 | #define EXFAT_ROOT_INO 1 |
15 | |
16 | #define EXFAT_CLUSTERS_UNTRACKED (~0u) |
17 | |
18 | /* |
19 | * exfat error flags |
20 | */ |
21 | enum exfat_error_mode { |
22 | EXFAT_ERRORS_CONT, /* ignore error and continue */ |
23 | EXFAT_ERRORS_PANIC, /* panic on error */ |
24 | EXFAT_ERRORS_RO, /* remount r/o on error */ |
25 | }; |
26 | |
27 | /* |
28 | * exfat nls lossy flag |
29 | */ |
30 | enum { |
31 | NLS_NAME_NO_LOSSY = 0, /* no lossy */ |
32 | NLS_NAME_LOSSY = 1 << 0, /* just detected incorrect filename(s) */ |
33 | NLS_NAME_OVERLEN = 1 << 1, /* the length is over than its limit */ |
34 | }; |
35 | |
36 | #define EXFAT_HASH_BITS 8 |
37 | #define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS) |
38 | |
39 | /* |
40 | * Type Definitions |
41 | */ |
42 | #define ES_2_ENTRIES 2 |
43 | #define ES_ALL_ENTRIES 0 |
44 | |
45 | #define ES_IDX_FILE 0 |
46 | #define ES_IDX_STREAM 1 |
47 | #define ES_IDX_FIRST_FILENAME 2 |
48 | #define EXFAT_FILENAME_ENTRY_NUM(name_len) \ |
49 | DIV_ROUND_UP(name_len, EXFAT_FILE_NAME_LEN) |
50 | #define ES_IDX_LAST_FILENAME(name_len) \ |
51 | (ES_IDX_FIRST_FILENAME + EXFAT_FILENAME_ENTRY_NUM(name_len) - 1) |
52 | |
53 | #define DIR_DELETED 0xFFFFFFF7 |
54 | |
55 | /* type values */ |
56 | #define TYPE_UNUSED 0x0000 |
57 | #define TYPE_DELETED 0x0001 |
58 | #define TYPE_INVALID 0x0002 |
59 | #define TYPE_CRITICAL_PRI 0x0100 |
60 | #define TYPE_BITMAP 0x0101 |
61 | #define TYPE_UPCASE 0x0102 |
62 | #define TYPE_VOLUME 0x0103 |
63 | #define TYPE_DIR 0x0104 |
64 | #define TYPE_FILE 0x011F |
65 | #define TYPE_CRITICAL_SEC 0x0200 |
66 | #define TYPE_STREAM 0x0201 |
67 | #define TYPE_EXTEND 0x0202 |
68 | #define TYPE_ACL 0x0203 |
69 | #define TYPE_BENIGN_PRI 0x0400 |
70 | #define TYPE_GUID 0x0401 |
71 | #define TYPE_PADDING 0x0402 |
72 | #define TYPE_ACLTAB 0x0403 |
73 | #define TYPE_BENIGN_SEC 0x0800 |
74 | #define TYPE_VENDOR_EXT 0x0801 |
75 | #define TYPE_VENDOR_ALLOC 0x0802 |
76 | |
77 | #define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */ |
78 | #define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */ |
79 | #define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE) |
80 | |
81 | #define EXFAT_HINT_NONE -1 |
82 | #define EXFAT_MIN_SUBDIR 2 |
83 | |
84 | /* |
85 | * helpers for cluster size to byte conversion. |
86 | */ |
87 | #define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits) |
88 | #define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits) |
89 | #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \ |
90 | (((b - 1) >> (sbi)->cluster_size_bits) + 1) |
91 | #define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1)) |
92 | |
93 | /* |
94 | * helpers for block size to byte conversion. |
95 | */ |
96 | #define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits) |
97 | #define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits) |
98 | #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \ |
99 | (((b - 1) >> (sb)->s_blocksize_bits) + 1) |
100 | #define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1)) |
101 | |
102 | /* |
103 | * helpers for block size to dentry size conversion. |
104 | */ |
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 cluster size to dentry size conversion. |
110 | */ |
111 | #define EXFAT_CLU_TO_DEN(clu, sbi) \ |
112 | ((clu) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) |
113 | #define EXFAT_DEN_TO_CLU(dentry, sbi) \ |
114 | ((dentry) >> ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) |
115 | |
116 | /* |
117 | * helpers for fat entry. |
118 | */ |
119 | #define FAT_ENT_SIZE (4) |
120 | #define FAT_ENT_SIZE_BITS (2) |
121 | #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \ |
122 | (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits)) |
123 | #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \ |
124 | ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1)) |
125 | |
126 | /* |
127 | * helpers for bitmap. |
128 | */ |
129 | #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS) |
130 | #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS) |
131 | #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE) |
132 | #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1) |
133 | #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \ |
134 | ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits) |
135 | #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb)) |
136 | #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \ |
137 | ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1)) |
138 | #define IGNORED_BITS_REMAINED(clu, clu_base) ((1UL << ((clu) - (clu_base))) - 1) |
139 | |
140 | #define ES_ENTRY_NUM(name_len) (ES_IDX_LAST_FILENAME(name_len) + 1) |
141 | /* 19 entries = 1 file entry + 1 stream entry + 17 filename entries */ |
142 | #define ES_MAX_ENTRY_NUM ES_ENTRY_NUM(MAX_NAME_LENGTH) |
143 | |
144 | /* |
145 | * 19 entries x 32 bytes/entry = 608 bytes. |
146 | * The 608 bytes are in 3 sectors at most (even 512 Byte sector). |
147 | */ |
148 | #define DIR_CACHE_SIZE \ |
149 | (DIV_ROUND_UP(EXFAT_DEN_TO_B(ES_MAX_ENTRY_NUM), SECTOR_SIZE) + 1) |
150 | |
151 | struct exfat_dentry_namebuf { |
152 | char *lfn; |
153 | int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */ |
154 | }; |
155 | |
156 | /* unicode name structure */ |
157 | struct exfat_uni_name { |
158 | /* +3 for null and for converting */ |
159 | unsigned short name[MAX_NAME_LENGTH + 3]; |
160 | u16 name_hash; |
161 | unsigned char name_len; |
162 | }; |
163 | |
164 | /* directory structure */ |
165 | struct exfat_chain { |
166 | unsigned int dir; |
167 | unsigned int size; |
168 | unsigned char flags; |
169 | }; |
170 | |
171 | /* first empty entry hint information */ |
172 | struct exfat_hint_femp { |
173 | /* entry index of a directory */ |
174 | int eidx; |
175 | /* count of continuous empty entry */ |
176 | int count; |
177 | /* the cluster that first empty slot exists in */ |
178 | struct exfat_chain cur; |
179 | }; |
180 | |
181 | /* hint structure */ |
182 | struct exfat_hint { |
183 | unsigned int clu; |
184 | union { |
185 | unsigned int off; /* cluster offset */ |
186 | int eidx; /* entry index */ |
187 | }; |
188 | }; |
189 | |
190 | struct exfat_entry_set_cache { |
191 | struct super_block *sb; |
192 | unsigned int start_off; |
193 | int num_bh; |
194 | struct buffer_head *__bh[DIR_CACHE_SIZE]; |
195 | struct buffer_head **bh; |
196 | unsigned int num_entries; |
197 | bool modified; |
198 | }; |
199 | |
200 | #define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh) |
201 | |
202 | struct exfat_dir_entry { |
203 | struct exfat_chain dir; |
204 | int entry; |
205 | unsigned int type; |
206 | unsigned int start_clu; |
207 | unsigned char flags; |
208 | unsigned short attr; |
209 | loff_t size; |
210 | loff_t valid_size; |
211 | unsigned int num_subdirs; |
212 | struct timespec64 atime; |
213 | struct timespec64 mtime; |
214 | struct timespec64 crtime; |
215 | struct exfat_dentry_namebuf namebuf; |
216 | }; |
217 | |
218 | /* |
219 | * exfat mount in-memory data |
220 | */ |
221 | struct exfat_mount_options { |
222 | kuid_t fs_uid; |
223 | kgid_t fs_gid; |
224 | unsigned short fs_fmask; |
225 | unsigned short fs_dmask; |
226 | /* permission for setting the [am]time */ |
227 | unsigned short allow_utime; |
228 | /* charset for filename input/display */ |
229 | char *iocharset; |
230 | /* on error: continue, panic, remount-ro */ |
231 | enum exfat_error_mode errors; |
232 | unsigned utf8:1, /* Use of UTF-8 character set */ |
233 | sys_tz:1, /* Use local timezone */ |
234 | discard:1, /* Issue discard requests on deletions */ |
235 | keep_last_dots:1; /* Keep trailing periods in paths */ |
236 | int time_offset; /* Offset of timestamps from UTC (in minutes) */ |
237 | /* Support creating zero-size directory, default: false */ |
238 | bool zero_size_dir; |
239 | }; |
240 | |
241 | /* |
242 | * EXFAT file system superblock in-memory data |
243 | */ |
244 | struct exfat_sb_info { |
245 | unsigned long long num_sectors; /* num of sectors in volume */ |
246 | unsigned int num_clusters; /* num of clusters in volume */ |
247 | unsigned int cluster_size; /* cluster size in bytes */ |
248 | unsigned int cluster_size_bits; |
249 | unsigned int sect_per_clus; /* cluster size in sectors */ |
250 | unsigned int sect_per_clus_bits; |
251 | unsigned long long FAT1_start_sector; /* FAT1 start sector */ |
252 | unsigned long long FAT2_start_sector; /* FAT2 start sector */ |
253 | unsigned long long data_start_sector; /* data area start sector */ |
254 | unsigned int num_FAT_sectors; /* num of FAT sectors */ |
255 | unsigned int root_dir; /* root dir cluster */ |
256 | unsigned int dentries_per_clu; /* num of dentries per cluster */ |
257 | unsigned int vol_flags; /* volume flags */ |
258 | unsigned int vol_flags_persistent; /* volume flags to retain */ |
259 | struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ |
260 | |
261 | unsigned int map_clu; /* allocation bitmap start cluster */ |
262 | unsigned int map_sectors; /* num of allocation bitmap sectors */ |
263 | struct buffer_head **vol_amap; /* allocation bitmap */ |
264 | |
265 | unsigned short *vol_utbl; /* upcase table */ |
266 | |
267 | unsigned int clu_srch_ptr; /* cluster search pointer */ |
268 | unsigned int used_clusters; /* number of used clusters */ |
269 | |
270 | struct mutex s_lock; /* superblock lock */ |
271 | struct mutex bitmap_lock; /* bitmap lock */ |
272 | struct exfat_mount_options options; |
273 | struct nls_table *nls_io; /* Charset used for input and display */ |
274 | struct ratelimit_state ratelimit; |
275 | |
276 | spinlock_t inode_hash_lock; |
277 | struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; |
278 | struct rcu_head rcu; |
279 | }; |
280 | |
281 | #define EXFAT_CACHE_VALID 0 |
282 | |
283 | /* |
284 | * EXFAT file system inode in-memory data |
285 | */ |
286 | struct exfat_inode_info { |
287 | struct exfat_chain dir; |
288 | int entry; |
289 | unsigned int type; |
290 | unsigned short attr; |
291 | unsigned int start_clu; |
292 | unsigned char flags; |
293 | /* |
294 | * the copy of low 32bit of i_version to check |
295 | * the validation of hint_stat. |
296 | */ |
297 | unsigned int version; |
298 | |
299 | /* hint for cluster last accessed */ |
300 | struct exfat_hint hint_bmap; |
301 | /* hint for entry index we try to lookup next time */ |
302 | struct exfat_hint hint_stat; |
303 | /* hint for first empty entry */ |
304 | struct exfat_hint_femp hint_femp; |
305 | |
306 | spinlock_t cache_lru_lock; |
307 | struct list_head cache_lru; |
308 | int nr_caches; |
309 | /* for avoiding the race between alloc and free */ |
310 | unsigned int cache_valid_id; |
311 | |
312 | /* |
313 | * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access. |
314 | * physically allocated size. |
315 | */ |
316 | loff_t i_size_ondisk; |
317 | /* block-aligned i_size (used in cont_write_begin) */ |
318 | loff_t i_size_aligned; |
319 | /* on-disk position of directory entry or 0 */ |
320 | loff_t i_pos; |
321 | loff_t valid_size; |
322 | /* hash by i_location */ |
323 | struct hlist_node i_hash_fat; |
324 | /* protect bmap against truncate */ |
325 | struct rw_semaphore truncate_lock; |
326 | struct inode vfs_inode; |
327 | /* File creation time */ |
328 | struct timespec64 i_crtime; |
329 | }; |
330 | |
331 | static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) |
332 | { |
333 | return sb->s_fs_info; |
334 | } |
335 | |
336 | static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) |
337 | { |
338 | return container_of(inode, struct exfat_inode_info, vfs_inode); |
339 | } |
340 | |
341 | /* |
342 | * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to |
343 | * save ATTR_RO instead of ->i_mode. |
344 | * |
345 | * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only |
346 | * bit, it's just used as flag for app. |
347 | */ |
348 | static inline int exfat_mode_can_hold_ro(struct inode *inode) |
349 | { |
350 | struct exfat_sb_info *sbi = EXFAT_SB(sb: inode->i_sb); |
351 | |
352 | if (S_ISDIR(inode->i_mode)) |
353 | return 0; |
354 | |
355 | if ((~sbi->options.fs_fmask) & 0222) |
356 | return 1; |
357 | return 0; |
358 | } |
359 | |
360 | /* Convert attribute bits and a mask to the UNIX mode. */ |
361 | static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, |
362 | unsigned short attr, mode_t mode) |
363 | { |
364 | if ((attr & EXFAT_ATTR_READONLY) && !(attr & EXFAT_ATTR_SUBDIR)) |
365 | mode &= ~0222; |
366 | |
367 | if (attr & EXFAT_ATTR_SUBDIR) |
368 | return (mode & ~sbi->options.fs_dmask) | S_IFDIR; |
369 | |
370 | return (mode & ~sbi->options.fs_fmask) | S_IFREG; |
371 | } |
372 | |
373 | /* Return the FAT attribute byte for this inode */ |
374 | static inline unsigned short exfat_make_attr(struct inode *inode) |
375 | { |
376 | unsigned short attr = EXFAT_I(inode)->attr; |
377 | |
378 | if (S_ISDIR(inode->i_mode)) |
379 | attr |= EXFAT_ATTR_SUBDIR; |
380 | if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) |
381 | attr |= EXFAT_ATTR_READONLY; |
382 | return attr; |
383 | } |
384 | |
385 | static inline void exfat_save_attr(struct inode *inode, unsigned short attr) |
386 | { |
387 | if (exfat_mode_can_hold_ro(inode)) |
388 | EXFAT_I(inode)->attr = attr & (EXFAT_ATTR_RWMASK | EXFAT_ATTR_READONLY); |
389 | else |
390 | EXFAT_I(inode)->attr = attr & EXFAT_ATTR_RWMASK; |
391 | } |
392 | |
393 | static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, |
394 | sector_t sec) |
395 | { |
396 | return ((sec - sbi->data_start_sector + 1) & |
397 | ((1 << sbi->sect_per_clus_bits) - 1)) == 0; |
398 | } |
399 | |
400 | static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, |
401 | unsigned int clus) |
402 | { |
403 | return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + |
404 | sbi->data_start_sector; |
405 | } |
406 | |
407 | static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, |
408 | sector_t sec) |
409 | { |
410 | return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + |
411 | EXFAT_RESERVED_CLUSTERS; |
412 | } |
413 | |
414 | static inline bool is_valid_cluster(struct exfat_sb_info *sbi, |
415 | unsigned int clus) |
416 | { |
417 | return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; |
418 | } |
419 | |
420 | /* super.c */ |
421 | int exfat_set_volume_dirty(struct super_block *sb); |
422 | int exfat_clear_volume_dirty(struct super_block *sb); |
423 | |
424 | /* fatent.c */ |
425 | #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) |
426 | |
427 | int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, |
428 | struct exfat_chain *p_chain, bool sync_bmap); |
429 | int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); |
430 | int exfat_ent_get(struct super_block *sb, unsigned int loc, |
431 | unsigned int *content); |
432 | int exfat_ent_set(struct super_block *sb, unsigned int loc, |
433 | unsigned int content); |
434 | int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, |
435 | unsigned int len); |
436 | int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); |
437 | int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, |
438 | unsigned int *ret_clu); |
439 | int exfat_count_num_clusters(struct super_block *sb, |
440 | struct exfat_chain *p_chain, unsigned int *ret_count); |
441 | |
442 | /* balloc.c */ |
443 | int exfat_load_bitmap(struct super_block *sb); |
444 | void exfat_free_bitmap(struct exfat_sb_info *sbi); |
445 | int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); |
446 | void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); |
447 | unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); |
448 | int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); |
449 | int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); |
450 | |
451 | /* file.c */ |
452 | extern const struct file_operations exfat_file_operations; |
453 | int __exfat_truncate(struct inode *inode); |
454 | void exfat_truncate(struct inode *inode); |
455 | int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
456 | struct iattr *attr); |
457 | int exfat_getattr(struct mnt_idmap *idmap, const struct path *path, |
458 | struct kstat *stat, unsigned int request_mask, |
459 | unsigned int query_flags); |
460 | int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); |
461 | long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); |
462 | long exfat_compat_ioctl(struct file *filp, unsigned int cmd, |
463 | unsigned long arg); |
464 | |
465 | /* namei.c */ |
466 | extern const struct dentry_operations exfat_dentry_ops; |
467 | extern const struct dentry_operations exfat_utf8_dentry_ops; |
468 | |
469 | /* cache.c */ |
470 | int exfat_cache_init(void); |
471 | void exfat_cache_shutdown(void); |
472 | void exfat_cache_inval_inode(struct inode *inode); |
473 | int exfat_get_cluster(struct inode *inode, unsigned int cluster, |
474 | unsigned int *fclus, unsigned int *dclus, |
475 | unsigned int *last_dclus, int allow_eof); |
476 | |
477 | /* dir.c */ |
478 | extern const struct inode_operations exfat_dir_inode_operations; |
479 | extern const struct file_operations exfat_dir_operations; |
480 | unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); |
481 | void exfat_init_dir_entry(struct exfat_entry_set_cache *es, |
482 | unsigned int type, unsigned int start_clu, |
483 | unsigned long long size, struct timespec64 *ts); |
484 | void exfat_init_ext_entry(struct exfat_entry_set_cache *es, int num_entries, |
485 | struct exfat_uni_name *p_uniname); |
486 | void exfat_remove_entries(struct inode *inode, struct exfat_entry_set_cache *es, |
487 | int order); |
488 | void exfat_update_dir_chksum(struct exfat_entry_set_cache *es); |
489 | int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); |
490 | int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, |
491 | struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, |
492 | struct exfat_hint *hint_opt); |
493 | int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); |
494 | struct exfat_dentry *exfat_get_dentry(struct super_block *sb, |
495 | struct exfat_chain *p_dir, int entry, struct buffer_head **bh); |
496 | struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, |
497 | int num); |
498 | int exfat_get_dentry_set(struct exfat_entry_set_cache *es, |
499 | struct super_block *sb, struct exfat_chain *p_dir, int entry, |
500 | unsigned int num_entries); |
501 | int exfat_get_empty_dentry_set(struct exfat_entry_set_cache *es, |
502 | struct super_block *sb, struct exfat_chain *p_dir, int entry, |
503 | unsigned int num_entries); |
504 | int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); |
505 | int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); |
506 | |
507 | /* inode.c */ |
508 | extern const struct inode_operations exfat_file_inode_operations; |
509 | void exfat_sync_inode(struct inode *inode); |
510 | struct inode *exfat_build_inode(struct super_block *sb, |
511 | struct exfat_dir_entry *info, loff_t i_pos); |
512 | void exfat_hash_inode(struct inode *inode, loff_t i_pos); |
513 | void exfat_unhash_inode(struct inode *inode); |
514 | struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); |
515 | int __exfat_write_inode(struct inode *inode, int sync); |
516 | int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); |
517 | void exfat_evict_inode(struct inode *inode); |
518 | int exfat_block_truncate_page(struct inode *inode, loff_t from); |
519 | |
520 | /* exfat/nls.c */ |
521 | unsigned short exfat_toupper(struct super_block *sb, unsigned short a); |
522 | int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, |
523 | unsigned short *b, unsigned int len); |
524 | int exfat_utf16_to_nls(struct super_block *sb, |
525 | struct exfat_uni_name *uniname, unsigned char *p_cstring, |
526 | int len); |
527 | int exfat_nls_to_utf16(struct super_block *sb, |
528 | const unsigned char *p_cstring, const int len, |
529 | struct exfat_uni_name *uniname, int *p_lossy); |
530 | int exfat_create_upcase_table(struct super_block *sb); |
531 | void exfat_free_upcase_table(struct exfat_sb_info *sbi); |
532 | |
533 | /* exfat/misc.c */ |
534 | void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) |
535 | __printf(3, 4) __cold; |
536 | #define exfat_fs_error(sb, fmt, args...) \ |
537 | __exfat_fs_error(sb, 1, fmt, ## args) |
538 | #define exfat_fs_error_ratelimit(sb, fmt, args...) \ |
539 | __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ |
540 | fmt, ## args) |
541 | |
542 | /* expand to pr_*() with prefix */ |
543 | #define exfat_err(sb, fmt, ...) \ |
544 | pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) |
545 | #define exfat_warn(sb, fmt, ...) \ |
546 | pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) |
547 | #define exfat_info(sb, fmt, ...) \ |
548 | pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) |
549 | #define exfat_debug(sb, fmt, ...) \ |
550 | pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) |
551 | |
552 | void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, |
553 | u8 tz, __le16 time, __le16 date, u8 time_cs); |
554 | void exfat_truncate_atime(struct timespec64 *ts); |
555 | void exfat_truncate_inode_atime(struct inode *inode); |
556 | void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, |
557 | u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); |
558 | u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); |
559 | u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); |
560 | void exfat_update_bh(struct buffer_head *bh, int sync); |
561 | int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); |
562 | void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, |
563 | unsigned int size, unsigned char flags); |
564 | void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); |
565 | |
566 | #endif /* !_EXFAT_FS_H */ |
567 | |