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 0xFFFF0321 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_ALL 0x0FFF 75 76 #define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */ 77 #define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */ 78 #define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE) 79 80 #define EXFAT_HINT_NONE -1 81 #define EXFAT_MIN_SUBDIR 2 82 83 /* 84 * helpers for cluster size to byte conversion. 85 */ 86 #define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits) 87 #define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits) 88 #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \ 89 (((b - 1) >> (sbi)->cluster_size_bits) + 1) 90 #define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1)) 91 92 /* 93 * helpers for block size to byte conversion. 94 */ 95 #define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits) 96 #define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits) 97 #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \ 98 (((b - 1) >> (sb)->s_blocksize_bits) + 1) 99 #define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1)) 100 101 /* 102 * helpers for block size to dentry size conversion. 103 */ 104 #define EXFAT_B_TO_DEN_IDX(b, sbi) \ 105 ((b) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) 106 #define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS) 107 #define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS) 108 109 /* 110 * helpers for fat entry. 111 */ 112 #define FAT_ENT_SIZE (4) 113 #define FAT_ENT_SIZE_BITS (2) 114 #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \ 115 (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits)) 116 #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \ 117 ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1)) 118 119 /* 120 * helpers for bitmap. 121 */ 122 #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS) 123 #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS) 124 #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE) 125 #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1) 126 #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \ 127 ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits) 128 #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb)) 129 #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \ 130 ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1)) 131 #define BITS_PER_BYTE_MASK 0x7 132 #define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1) 133 134 #define ES_ENTRY_NUM(name_len) (ES_IDX_LAST_FILENAME(name_len) + 1) 135 /* 19 entries = 1 file entry + 1 stream entry + 17 filename entries */ 136 #define ES_MAX_ENTRY_NUM ES_ENTRY_NUM(MAX_NAME_LENGTH) 137 138 /* 139 * 19 entries x 32 bytes/entry = 608 bytes. 140 * The 608 bytes are in 3 sectors at most (even 512 Byte sector). 141 */ 142 #define DIR_CACHE_SIZE \ 143 (DIV_ROUND_UP(EXFAT_DEN_TO_B(ES_MAX_ENTRY_NUM), SECTOR_SIZE) + 1) 144 145 struct exfat_dentry_namebuf { 146 char *lfn; 147 int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */ 148 }; 149 150 /* unicode name structure */ 151 struct exfat_uni_name { 152 /* +3 for null and for converting */ 153 unsigned short name[MAX_NAME_LENGTH + 3]; 154 u16 name_hash; 155 unsigned char name_len; 156 }; 157 158 /* directory structure */ 159 struct exfat_chain { 160 unsigned int dir; 161 unsigned int size; 162 unsigned char flags; 163 }; 164 165 /* first empty entry hint information */ 166 struct exfat_hint_femp { 167 /* entry index of a directory */ 168 int eidx; 169 /* count of continuous empty entry */ 170 int count; 171 /* the cluster that first empty slot exists in */ 172 struct exfat_chain cur; 173 }; 174 175 /* hint structure */ 176 struct exfat_hint { 177 unsigned int clu; 178 union { 179 unsigned int off; /* cluster offset */ 180 int eidx; /* entry index */ 181 }; 182 }; 183 184 struct exfat_entry_set_cache { 185 struct super_block *sb; 186 unsigned int start_off; 187 int num_bh; 188 struct buffer_head *bh[DIR_CACHE_SIZE]; 189 unsigned int num_entries; 190 bool modified; 191 }; 192 193 struct exfat_dir_entry { 194 struct exfat_chain dir; 195 int entry; 196 unsigned int type; 197 unsigned int start_clu; 198 unsigned char flags; 199 unsigned short attr; 200 loff_t size; 201 unsigned int num_subdirs; 202 struct timespec64 atime; 203 struct timespec64 mtime; 204 struct timespec64 crtime; 205 struct exfat_dentry_namebuf namebuf; 206 }; 207 208 /* 209 * exfat mount in-memory data 210 */ 211 struct exfat_mount_options { 212 kuid_t fs_uid; 213 kgid_t fs_gid; 214 unsigned short fs_fmask; 215 unsigned short fs_dmask; 216 /* permission for setting the [am]time */ 217 unsigned short allow_utime; 218 /* charset for filename input/display */ 219 char *iocharset; 220 /* on error: continue, panic, remount-ro */ 221 enum exfat_error_mode errors; 222 unsigned utf8:1, /* Use of UTF-8 character set */ 223 sys_tz:1, /* Use local timezone */ 224 discard:1, /* Issue discard requests on deletions */ 225 keep_last_dots:1; /* Keep trailing periods in paths */ 226 int time_offset; /* Offset of timestamps from UTC (in minutes) */ 227 }; 228 229 /* 230 * EXFAT file system superblock in-memory data 231 */ 232 struct exfat_sb_info { 233 unsigned long long num_sectors; /* num of sectors in volume */ 234 unsigned int num_clusters; /* num of clusters in volume */ 235 unsigned int cluster_size; /* cluster size in bytes */ 236 unsigned int cluster_size_bits; 237 unsigned int sect_per_clus; /* cluster size in sectors */ 238 unsigned int sect_per_clus_bits; 239 unsigned long long FAT1_start_sector; /* FAT1 start sector */ 240 unsigned long long FAT2_start_sector; /* FAT2 start sector */ 241 unsigned long long data_start_sector; /* data area start sector */ 242 unsigned int num_FAT_sectors; /* num of FAT sectors */ 243 unsigned int root_dir; /* root dir cluster */ 244 unsigned int dentries_per_clu; /* num of dentries per cluster */ 245 unsigned int vol_flags; /* volume flags */ 246 unsigned int vol_flags_persistent; /* volume flags to retain */ 247 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 248 249 unsigned int map_clu; /* allocation bitmap start cluster */ 250 unsigned int map_sectors; /* num of allocation bitmap sectors */ 251 struct buffer_head **vol_amap; /* allocation bitmap */ 252 253 unsigned short *vol_utbl; /* upcase table */ 254 255 unsigned int clu_srch_ptr; /* cluster search pointer */ 256 unsigned int used_clusters; /* number of used clusters */ 257 258 struct mutex s_lock; /* superblock lock */ 259 struct mutex bitmap_lock; /* bitmap lock */ 260 struct exfat_mount_options options; 261 struct nls_table *nls_io; /* Charset used for input and display */ 262 struct ratelimit_state ratelimit; 263 264 spinlock_t inode_hash_lock; 265 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; 266 267 struct rcu_head rcu; 268 }; 269 270 #define EXFAT_CACHE_VALID 0 271 272 /* 273 * EXFAT file system inode in-memory data 274 */ 275 struct exfat_inode_info { 276 struct exfat_chain dir; 277 int entry; 278 unsigned int type; 279 unsigned short attr; 280 unsigned int start_clu; 281 unsigned char flags; 282 /* 283 * the copy of low 32bit of i_version to check 284 * the validation of hint_stat. 285 */ 286 unsigned int version; 287 288 /* hint for cluster last accessed */ 289 struct exfat_hint hint_bmap; 290 /* hint for entry index we try to lookup next time */ 291 struct exfat_hint hint_stat; 292 /* hint for first empty entry */ 293 struct exfat_hint_femp hint_femp; 294 295 spinlock_t cache_lru_lock; 296 struct list_head cache_lru; 297 int nr_caches; 298 /* for avoiding the race between alloc and free */ 299 unsigned int cache_valid_id; 300 301 /* 302 * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access. 303 * physically allocated size. 304 */ 305 loff_t i_size_ondisk; 306 /* block-aligned i_size (used in cont_write_begin) */ 307 loff_t i_size_aligned; 308 /* on-disk position of directory entry or 0 */ 309 loff_t i_pos; 310 /* hash by i_location */ 311 struct hlist_node i_hash_fat; 312 /* protect bmap against truncate */ 313 struct rw_semaphore truncate_lock; 314 struct inode vfs_inode; 315 /* File creation time */ 316 struct timespec64 i_crtime; 317 }; 318 319 static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) 320 { 321 return sb->s_fs_info; 322 } 323 324 static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) 325 { 326 return container_of(inode, struct exfat_inode_info, vfs_inode); 327 } 328 329 /* 330 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to 331 * save ATTR_RO instead of ->i_mode. 332 * 333 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only 334 * bit, it's just used as flag for app. 335 */ 336 static inline int exfat_mode_can_hold_ro(struct inode *inode) 337 { 338 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); 339 340 if (S_ISDIR(inode->i_mode)) 341 return 0; 342 343 if ((~sbi->options.fs_fmask) & 0222) 344 return 1; 345 return 0; 346 } 347 348 /* Convert attribute bits and a mask to the UNIX mode. */ 349 static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, 350 unsigned short attr, mode_t mode) 351 { 352 if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR)) 353 mode &= ~0222; 354 355 if (attr & ATTR_SUBDIR) 356 return (mode & ~sbi->options.fs_dmask) | S_IFDIR; 357 358 return (mode & ~sbi->options.fs_fmask) | S_IFREG; 359 } 360 361 /* Return the FAT attribute byte for this inode */ 362 static inline unsigned short exfat_make_attr(struct inode *inode) 363 { 364 unsigned short attr = EXFAT_I(inode)->attr; 365 366 if (S_ISDIR(inode->i_mode)) 367 attr |= ATTR_SUBDIR; 368 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) 369 attr |= ATTR_READONLY; 370 return attr; 371 } 372 373 static inline void exfat_save_attr(struct inode *inode, unsigned short attr) 374 { 375 if (exfat_mode_can_hold_ro(inode)) 376 EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY); 377 else 378 EXFAT_I(inode)->attr = attr & ATTR_RWMASK; 379 } 380 381 static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, 382 sector_t sec) 383 { 384 return ((sec - sbi->data_start_sector + 1) & 385 ((1 << sbi->sect_per_clus_bits) - 1)) == 0; 386 } 387 388 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 389 unsigned int clus) 390 { 391 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 392 sbi->data_start_sector; 393 } 394 395 static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 396 sector_t sec) 397 { 398 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 399 EXFAT_RESERVED_CLUSTERS; 400 } 401 402 static inline bool is_valid_cluster(struct exfat_sb_info *sbi, 403 unsigned int clus) 404 { 405 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; 406 } 407 408 /* super.c */ 409 int exfat_set_volume_dirty(struct super_block *sb); 410 int exfat_clear_volume_dirty(struct super_block *sb); 411 412 /* fatent.c */ 413 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 414 415 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 416 struct exfat_chain *p_chain, bool sync_bmap); 417 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 418 int exfat_ent_get(struct super_block *sb, unsigned int loc, 419 unsigned int *content); 420 int exfat_ent_set(struct super_block *sb, unsigned int loc, 421 unsigned int content); 422 int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, 423 int entry, struct exfat_dentry *p_entry); 424 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, 425 unsigned int len); 426 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); 427 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, 428 unsigned int *ret_clu); 429 int exfat_count_num_clusters(struct super_block *sb, 430 struct exfat_chain *p_chain, unsigned int *ret_count); 431 432 /* balloc.c */ 433 int exfat_load_bitmap(struct super_block *sb); 434 void exfat_free_bitmap(struct exfat_sb_info *sbi); 435 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); 436 void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); 437 unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); 438 int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); 439 int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); 440 441 /* file.c */ 442 extern const struct file_operations exfat_file_operations; 443 int __exfat_truncate(struct inode *inode, loff_t new_size); 444 void exfat_truncate(struct inode *inode, loff_t size); 445 int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 446 struct iattr *attr); 447 int exfat_getattr(struct user_namespace *mnt_userns, const struct path *path, 448 struct kstat *stat, unsigned int request_mask, 449 unsigned int query_flags); 450 int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 451 long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 452 long exfat_compat_ioctl(struct file *filp, unsigned int cmd, 453 unsigned long arg); 454 455 /* namei.c */ 456 extern const struct dentry_operations exfat_dentry_ops; 457 extern const struct dentry_operations exfat_utf8_dentry_ops; 458 459 /* cache.c */ 460 int exfat_cache_init(void); 461 void exfat_cache_shutdown(void); 462 void exfat_cache_inval_inode(struct inode *inode); 463 int exfat_get_cluster(struct inode *inode, unsigned int cluster, 464 unsigned int *fclus, unsigned int *dclus, 465 unsigned int *last_dclus, int allow_eof); 466 467 /* dir.c */ 468 extern const struct inode_operations exfat_dir_inode_operations; 469 extern const struct file_operations exfat_dir_operations; 470 unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); 471 int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, 472 int entry, unsigned int type, unsigned int start_clu, 473 unsigned long long size); 474 int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, 475 int entry, int num_entries, struct exfat_uni_name *p_uniname); 476 int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, 477 int entry, int order, int num_entries); 478 int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, 479 int entry); 480 void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); 481 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 482 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, 483 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 484 int num_entries, unsigned int type, struct exfat_hint *hint_opt); 485 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 486 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 487 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 488 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 489 int num); 490 struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb, 491 struct exfat_chain *p_dir, int entry, unsigned int type); 492 int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync); 493 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 494 495 /* inode.c */ 496 extern const struct inode_operations exfat_file_inode_operations; 497 void exfat_sync_inode(struct inode *inode); 498 struct inode *exfat_build_inode(struct super_block *sb, 499 struct exfat_dir_entry *info, loff_t i_pos); 500 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 501 void exfat_unhash_inode(struct inode *inode); 502 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 503 int __exfat_write_inode(struct inode *inode, int sync); 504 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 505 void exfat_evict_inode(struct inode *inode); 506 int exfat_block_truncate_page(struct inode *inode, loff_t from); 507 508 /* exfat/nls.c */ 509 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 510 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 511 unsigned short *b, unsigned int len); 512 int exfat_utf16_to_nls(struct super_block *sb, 513 struct exfat_uni_name *uniname, unsigned char *p_cstring, 514 int len); 515 int exfat_nls_to_utf16(struct super_block *sb, 516 const unsigned char *p_cstring, const int len, 517 struct exfat_uni_name *uniname, int *p_lossy); 518 int exfat_create_upcase_table(struct super_block *sb); 519 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 520 521 /* exfat/misc.c */ 522 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) 523 __printf(3, 4) __cold; 524 #define exfat_fs_error(sb, fmt, args...) \ 525 __exfat_fs_error(sb, 1, fmt, ## args) 526 #define exfat_fs_error_ratelimit(sb, fmt, args...) \ 527 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ 528 fmt, ## args) 529 530 /* expand to pr_*() with prefix */ 531 #define exfat_err(sb, fmt, ...) \ 532 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 533 #define exfat_warn(sb, fmt, ...) \ 534 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 535 #define exfat_info(sb, fmt, ...) \ 536 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 537 #define exfat_debug(sb, fmt, ...) \ 538 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 539 540 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 541 u8 tz, __le16 time, __le16 date, u8 time_cs); 542 void exfat_truncate_atime(struct timespec64 *ts); 543 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 544 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 545 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 546 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 547 void exfat_update_bh(struct buffer_head *bh, int sync); 548 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 549 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 550 unsigned int size, unsigned char flags); 551 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 552 553 #endif /* !_EXFAT_FS_H */ 554