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Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next...
[linux-block.git] / fs / exfat / exfat_fs.h
CommitLineData
1acf1a56
NJ		 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>
f83d8a3b 12#include <linux/blkdev.h>
1acf1a56 13
1acf1a56
NJ		 14#define EXFAT_ROOT_INO 1
15
1acf1a56
NJ		 16#define EXFAT_CLUSTERS_UNTRACKED (~0u)
17
18/*
19 * exfat error flags
20 */
21enum 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 */
30enum {
1b1a9195
TI		 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 */
1acf1a56
NJ		 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
f83d8a3b
YM		 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
bdaadfd3 53#define DIR_DELETED 0xFFFFFFF7
1acf1a56
NJ		 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
8258ef28
NJ		 74#define TYPE_VENDOR_EXT 0x0801
75#define TYPE_VENDOR_ALLOC 0x0802
1acf1a56
NJ		 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
1acf1a56
NJ		 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 */
1acf1a56
NJ		 105#define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS)
106#define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS)
107
088f1343
YM		 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
1acf1a56
NJ		 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 BITS_PER_BYTE_MASK 0x7
139#define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1)
140
f83d8a3b
YM		 141#define ES_ENTRY_NUM(name_len) (ES_IDX_LAST_FILENAME(name_len) + 1)
142/* 19 entries = 1 file entry + 1 stream entry + 17 filename entries */
143#define ES_MAX_ENTRY_NUM ES_ENTRY_NUM(MAX_NAME_LENGTH)
144
145/*
146 * 19 entries x 32 bytes/entry = 608 bytes.
147 * The 608 bytes are in 3 sectors at most (even 512 Byte sector).
148 */
149#define DIR_CACHE_SIZE \
150 (DIV_ROUND_UP(EXFAT_DEN_TO_B(ES_MAX_ENTRY_NUM), SECTOR_SIZE) + 1)
151
1acf1a56
NJ		 152struct exfat_dentry_namebuf {
153 char *lfn;
9e456aea 154 int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */
1acf1a56
NJ		 155};
156
157/* unicode name structure */
158struct exfat_uni_name {
159 /* +3 for null and for converting */
160 unsigned short name[MAX_NAME_LENGTH + 3];
5875bf28 161 u16 name_hash;
1acf1a56
NJ		 162 unsigned char name_len;
163};
164
165/* directory structure */
166struct exfat_chain {
167 unsigned int dir;
168 unsigned int size;
169 unsigned char flags;
170};
171
172/* first empty entry hint information */
173struct exfat_hint_femp {
174 /* entry index of a directory */
175 int eidx;
176 /* count of continuous empty entry */
177 int count;
178 /* the cluster that first empty slot exists in */
179 struct exfat_chain cur;
180};
181
182/* hint structure */
183struct exfat_hint {
184 unsigned int clu;
185 union {
186 unsigned int off; /* cluster offset */
187 int eidx; /* entry index */
188 };
189};
190
191struct exfat_entry_set_cache {
943af1fd 192 struct super_block *sb;
943af1fd
TK		 193 unsigned int start_off;
194 int num_bh;
a3ff29a9
YM		 195 struct buffer_head *__bh[DIR_CACHE_SIZE];
196 struct buffer_head **bh;
1acf1a56 197 unsigned int num_entries;
f83d8a3b 198 bool modified;
1acf1a56
NJ		 199};
200
a3ff29a9
YM		 201#define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh)
202
1acf1a56
NJ		 203struct exfat_dir_entry {
204 struct exfat_chain dir;
205 int entry;
206 unsigned int type;
207 unsigned int start_clu;
208 unsigned char flags;
209 unsigned short attr;
210 loff_t 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 */
221struct 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 */
9b002894 233 sys_tz:1, /* Use local timezone */
9ec784bf
VK		 234 discard:1, /* Issue discard requests on deletions */
235 keep_last_dots:1; /* Keep trailing periods in paths */
1acf1a56
NJ		 236 int time_offset; /* Offset of timestamps from UTC (in minutes) */
237};
238
239/*
240 * EXFAT file system superblock in-memory data
241 */
242struct exfat_sb_info {
243 unsigned long long num_sectors; /* num of sectors in volume */
244 unsigned int num_clusters; /* num of clusters in volume */
245 unsigned int cluster_size; /* cluster size in bytes */
246 unsigned int cluster_size_bits;
247 unsigned int sect_per_clus; /* cluster size in sectors */
248 unsigned int sect_per_clus_bits;
249 unsigned long long FAT1_start_sector; /* FAT1 start sector */
250 unsigned long long FAT2_start_sector; /* FAT2 start sector */
251 unsigned long long data_start_sector; /* data area start sector */
252 unsigned int num_FAT_sectors; /* num of FAT sectors */
253 unsigned int root_dir; /* root dir cluster */
254 unsigned int dentries_per_clu; /* num of dentries per cluster */
7018ec68
TK		 255 unsigned int vol_flags; /* volume flags */
256 unsigned int vol_flags_persistent; /* volume flags to retain */
181a9e80 257 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */
1acf1a56
NJ		 258
259 unsigned int map_clu; /* allocation bitmap start cluster */
260 unsigned int map_sectors; /* num of allocation bitmap sectors */
261 struct buffer_head **vol_amap; /* allocation bitmap */
262
263 unsigned short *vol_utbl; /* upcase table */
264
265 unsigned int clu_srch_ptr; /* cluster search pointer */
266 unsigned int used_clusters; /* number of used clusters */
267
1acf1a56 268 struct mutex s_lock; /* superblock lock */
5c2d7285 269 struct mutex bitmap_lock; /* bitmap lock */
1acf1a56
NJ		 270 struct exfat_mount_options options;
271 struct nls_table *nls_io; /* Charset used for input and display */
272 struct ratelimit_state ratelimit;
273
274 spinlock_t inode_hash_lock;
275 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
276
277 struct rcu_head rcu;
278};
279
8ff006e5
NJ		 280#define EXFAT_CACHE_VALID 0
281
1acf1a56
NJ		 282/*
283 * EXFAT file system inode in-memory data
284 */
285struct exfat_inode_info {
286 struct exfat_chain dir;
287 int entry;
288 unsigned int type;
289 unsigned short attr;
290 unsigned int start_clu;
291 unsigned char flags;
292 /*
293 * the copy of low 32bit of i_version to check
294 * the validation of hint_stat.
295 */
296 unsigned int version;
1acf1a56
NJ		 297
298 /* hint for cluster last accessed */
299 struct exfat_hint hint_bmap;
300 /* hint for entry index we try to lookup next time */
301 struct exfat_hint hint_stat;
302 /* hint for first empty entry */
303 struct exfat_hint_femp hint_femp;
304
305 spinlock_t cache_lru_lock;
306 struct list_head cache_lru;
307 int nr_caches;
308 /* for avoiding the race between alloc and free */
309 unsigned int cache_valid_id;
310
311 /*
312 * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access.
313 * physically allocated size.
314 */
315 loff_t i_size_ondisk;
316 /* block-aligned i_size (used in cont_write_begin) */
317 loff_t i_size_aligned;
318 /* on-disk position of directory entry or 0 */
319 loff_t i_pos;
320 /* hash by i_location */
321 struct hlist_node i_hash_fat;
322 /* protect bmap against truncate */
323 struct rw_semaphore truncate_lock;
324 struct inode vfs_inode;
325 /* File creation time */
326 struct timespec64 i_crtime;
327};
328
329static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb)
330{
331 return sb->s_fs_info;
332}
333
334static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
335{
336 return container_of(inode, struct exfat_inode_info, vfs_inode);
337}
338
339/*
340 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to
341 * save ATTR_RO instead of ->i_mode.
342 *
343 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
344 * bit, it's just used as flag for app.
345 */
346static inline int exfat_mode_can_hold_ro(struct inode *inode)
347{
348 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
349
350 if (S_ISDIR(inode->i_mode))
351 return 0;
352
353 if ((~sbi->options.fs_fmask) & 0222)
354 return 1;
355 return 0;
356}
357
358/* Convert attribute bits and a mask to the UNIX mode. */
359static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi,
360 unsigned short attr, mode_t mode)
361{
362 if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
363 mode &= ~0222;
364
365 if (attr & ATTR_SUBDIR)
366 return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
367
368 return (mode & ~sbi->options.fs_fmask) | S_IFREG;
369}
370
371/* Return the FAT attribute byte for this inode */
372static inline unsigned short exfat_make_attr(struct inode *inode)
373{
374 unsigned short attr = EXFAT_I(inode)->attr;
375
376 if (S_ISDIR(inode->i_mode))
377 attr |= ATTR_SUBDIR;
378 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222))
379 attr |= ATTR_READONLY;
380 return attr;
381}
382
383static inline void exfat_save_attr(struct inode *inode, unsigned short attr)
384{
385 if (exfat_mode_can_hold_ro(inode))
386 EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY);
387 else
388 EXFAT_I(inode)->attr = attr & ATTR_RWMASK;
389}
390
391static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi,
392 sector_t sec)
393{
394 return ((sec - sbi->data_start_sector + 1) &
395 ((1 << sbi->sect_per_clus_bits) - 1)) == 0;
396}
397
398static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
399 unsigned int clus)
400{
43946b70 401 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) +
1acf1a56
NJ		 402 sbi->data_start_sector;
403}
404
40306b4d 405static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
1acf1a56
NJ		 406 sector_t sec)
407{
408 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
409 EXFAT_RESERVED_CLUSTERS;
410}
411
64ba4b15
TS		 412static inline bool is_valid_cluster(struct exfat_sb_info *sbi,
413 unsigned int clus)
414{
415 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters;
416}
417
1acf1a56 418/* super.c */
7018ec68
TK		 419int exfat_set_volume_dirty(struct super_block *sb);
420int exfat_clear_volume_dirty(struct super_block *sb);
1acf1a56
NJ		 421
422/* fatent.c */
423#define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu)
424
425int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
23befe49 426 struct exfat_chain *p_chain, bool sync_bmap);
1acf1a56
NJ		 427int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain);
428int exfat_ent_get(struct super_block *sb, unsigned int loc,
429 unsigned int *content);
430int exfat_ent_set(struct super_block *sb, unsigned int loc,
431 unsigned int content);
432int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir,
433 int entry, struct exfat_dentry *p_entry);
434int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain,
435 unsigned int len);
436int exfat_zeroed_cluster(struct inode *dir, unsigned int clu);
437int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
438 unsigned int *ret_clu);
439int exfat_count_num_clusters(struct super_block *sb,
440 struct exfat_chain *p_chain, unsigned int *ret_count);
441
442/* balloc.c */
443int exfat_load_bitmap(struct super_block *sb);
444void exfat_free_bitmap(struct exfat_sb_info *sbi);
23befe49 445int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync);
f728760a 446void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync);
1acf1a56
NJ		 447unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu);
448int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count);
654762df 449int exfat_trim_fs(struct inode *inode, struct fstrim_range *range);
1acf1a56
NJ		 450
451/* file.c */
452extern const struct file_operations exfat_file_operations;
f7cde967 453int __exfat_truncate(struct inode *inode);
e981917b 454void exfat_truncate(struct inode *inode);
c1632a0f 455int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
549c7297 456 struct iattr *attr);
b74d24f7 457int exfat_getattr(struct mnt_idmap *idmap, const struct path *path,
549c7297
CB		 458 struct kstat *stat, unsigned int request_mask,
459 unsigned int query_flags);
5267456e 460int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
654762df
HK		 461long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
462long exfat_compat_ioctl(struct file *filp, unsigned int cmd,
463 unsigned long arg);
1acf1a56
NJ		 464
465/* namei.c */
466extern const struct dentry_operations exfat_dentry_ops;
467extern const struct dentry_operations exfat_utf8_dentry_ops;
468
469/* cache.c */
470int exfat_cache_init(void);
471void exfat_cache_shutdown(void);
1acf1a56
NJ		 472void exfat_cache_inval_inode(struct inode *inode);
473int 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 */
478extern const struct inode_operations exfat_dir_inode_operations;
479extern const struct file_operations exfat_dir_operations;
480unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry);
481int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
482 int entry, unsigned int type, unsigned int start_clu,
483 unsigned long long size);
484int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
485 int entry, int num_entries, struct exfat_uni_name *p_uniname);
486int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
487 int entry, int order, int num_entries);
488int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
489 int entry);
943af1fd 490void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es);
1acf1a56
NJ		 491int exfat_calc_num_entries(struct exfat_uni_name *p_uniname);
492int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
493 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
72880cb5 494 struct exfat_hint *hint_opt);
1acf1a56 495int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu);
1acf1a56 496struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
c71510b3 497 struct exfat_chain *p_dir, int entry, struct buffer_head **bh);
943af1fd
TK		 498struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
499 int num);
20914ff6
YM		 500int exfat_get_dentry_set(struct exfat_entry_set_cache *es,
501 struct super_block *sb, struct exfat_chain *p_dir, int entry,
502 unsigned int type);
3b9681ac 503int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync);
1acf1a56
NJ		 504int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
505
506/* inode.c */
507extern const struct inode_operations exfat_file_inode_operations;
508void exfat_sync_inode(struct inode *inode);
509struct inode *exfat_build_inode(struct super_block *sb,
510 struct exfat_dir_entry *info, loff_t i_pos);
511void exfat_hash_inode(struct inode *inode, loff_t i_pos);
512void exfat_unhash_inode(struct inode *inode);
513struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
23e6e1c9 514int __exfat_write_inode(struct inode *inode, int sync);
1acf1a56
NJ		 515int exfat_write_inode(struct inode *inode, struct writeback_control *wbc);
516void exfat_evict_inode(struct inode *inode);
517int exfat_block_truncate_page(struct inode *inode, loff_t from);
518
519/* exfat/nls.c */
520unsigned short exfat_toupper(struct super_block *sb, unsigned short a);
521int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a,
522 unsigned short *b, unsigned int len);
523int exfat_utf16_to_nls(struct super_block *sb,
524 struct exfat_uni_name *uniname, unsigned char *p_cstring,
525 int len);
526int exfat_nls_to_utf16(struct super_block *sb,
527 const unsigned char *p_cstring, const int len,
528 struct exfat_uni_name *uniname, int *p_lossy);
529int exfat_create_upcase_table(struct super_block *sb);
530void exfat_free_upcase_table(struct exfat_sb_info *sbi);
1acf1a56
NJ		 531
532/* exfat/misc.c */
533void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
534 __printf(3, 4) __cold;
535#define exfat_fs_error(sb, fmt, args...) \
536 __exfat_fs_error(sb, 1, fmt, ## args)
537#define exfat_fs_error_ratelimit(sb, fmt, args...) \
538 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \
539 fmt, ## args)
6425baab
TI		 540
541/* expand to pr_*() with prefix */
d1727d55 542#define exfat_err(sb, fmt, ...) \
6425baab 543 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
d1727d55 544#define exfat_warn(sb, fmt, ...) \
6425baab 545 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
d1727d55 546#define exfat_info(sb, fmt, ...) \
6425baab
TI		 547 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
548#define exfat_debug(sb, fmt, ...) \
549 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
d1727d55 550
1acf1a56 551void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
ed0f84d3 552 u8 tz, __le16 time, __le16 date, u8 time_cs);
81df1ad4 553void exfat_truncate_atime(struct timespec64 *ts);
1acf1a56 554void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
ed0f84d3 555 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs);
5875bf28 556u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type);
476189c0 557u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type);
2c7f8937 558void exfat_update_bh(struct buffer_head *bh, int sync);
3db3c3fb 559int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync);
1acf1a56
NJ		 560void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
561 unsigned int size, unsigned char flags);
562void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec);
563
564#endif /* !_EXFAT_FS_H */
Linux 6.x block layer and io_uring tree(s)