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 struct buffer_head **bh; 190 unsigned int num_entries; 191 bool modified; 192 }; 193 194 #define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh) 195 196 struct exfat_dir_entry { 197 struct exfat_chain dir; 198 int entry; 199 unsigned int type; 200 unsigned int start_clu; 201 unsigned char flags; 202 unsigned short attr; 203 loff_t size; 204 unsigned int num_subdirs; 205 struct timespec64 atime; 206 struct timespec64 mtime; 207 struct timespec64 crtime; 208 struct exfat_dentry_namebuf namebuf; 209 }; 210 211 /* 212 * exfat mount in-memory data 213 */ 214 struct exfat_mount_options { 215 kuid_t fs_uid; 216 kgid_t fs_gid; 217 unsigned short fs_fmask; 218 unsigned short fs_dmask; 219 /* permission for setting the [am]time */ 220 unsigned short allow_utime; 221 /* charset for filename input/display */ 222 char *iocharset; 223 /* on error: continue, panic, remount-ro */ 224 enum exfat_error_mode errors; 225 unsigned utf8:1, /* Use of UTF-8 character set */ 226 sys_tz:1, /* Use local timezone */ 227 discard:1, /* Issue discard requests on deletions */ 228 keep_last_dots:1; /* Keep trailing periods in paths */ 229 int time_offset; /* Offset of timestamps from UTC (in minutes) */ 230 }; 231 232 /* 233 * EXFAT file system superblock in-memory data 234 */ 235 struct exfat_sb_info { 236 unsigned long long num_sectors; /* num of sectors in volume */ 237 unsigned int num_clusters; /* num of clusters in volume */ 238 unsigned int cluster_size; /* cluster size in bytes */ 239 unsigned int cluster_size_bits; 240 unsigned int sect_per_clus; /* cluster size in sectors */ 241 unsigned int sect_per_clus_bits; 242 unsigned long long FAT1_start_sector; /* FAT1 start sector */ 243 unsigned long long FAT2_start_sector; /* FAT2 start sector */ 244 unsigned long long data_start_sector; /* data area start sector */ 245 unsigned int num_FAT_sectors; /* num of FAT sectors */ 246 unsigned int root_dir; /* root dir cluster */ 247 unsigned int dentries_per_clu; /* num of dentries per cluster */ 248 unsigned int vol_flags; /* volume flags */ 249 unsigned int vol_flags_persistent; /* volume flags to retain */ 250 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 251 252 unsigned int map_clu; /* allocation bitmap start cluster */ 253 unsigned int map_sectors; /* num of allocation bitmap sectors */ 254 struct buffer_head **vol_amap; /* allocation bitmap */ 255 256 unsigned short *vol_utbl; /* upcase table */ 257 258 unsigned int clu_srch_ptr; /* cluster search pointer */ 259 unsigned int used_clusters; /* number of used clusters */ 260 261 struct mutex s_lock; /* superblock lock */ 262 struct mutex bitmap_lock; /* bitmap lock */ 263 struct exfat_mount_options options; 264 struct nls_table *nls_io; /* Charset used for input and display */ 265 struct ratelimit_state ratelimit; 266 267 spinlock_t inode_hash_lock; 268 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; 269 270 struct rcu_head rcu; 271 }; 272 273 #define EXFAT_CACHE_VALID 0 274 275 /* 276 * EXFAT file system inode in-memory data 277 */ 278 struct exfat_inode_info { 279 struct exfat_chain dir; 280 int entry; 281 unsigned int type; 282 unsigned short attr; 283 unsigned int start_clu; 284 unsigned char flags; 285 /* 286 * the copy of low 32bit of i_version to check 287 * the validation of hint_stat. 288 */ 289 unsigned int version; 290 291 /* hint for cluster last accessed */ 292 struct exfat_hint hint_bmap; 293 /* hint for entry index we try to lookup next time */ 294 struct exfat_hint hint_stat; 295 /* hint for first empty entry */ 296 struct exfat_hint_femp hint_femp; 297 298 spinlock_t cache_lru_lock; 299 struct list_head cache_lru; 300 int nr_caches; 301 /* for avoiding the race between alloc and free */ 302 unsigned int cache_valid_id; 303 304 /* 305 * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access. 306 * physically allocated size. 307 */ 308 loff_t i_size_ondisk; 309 /* block-aligned i_size (used in cont_write_begin) */ 310 loff_t i_size_aligned; 311 /* on-disk position of directory entry or 0 */ 312 loff_t i_pos; 313 /* hash by i_location */ 314 struct hlist_node i_hash_fat; 315 /* protect bmap against truncate */ 316 struct rw_semaphore truncate_lock; 317 struct inode vfs_inode; 318 /* File creation time */ 319 struct timespec64 i_crtime; 320 }; 321 322 static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) 323 { 324 return sb->s_fs_info; 325 } 326 327 static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) 328 { 329 return container_of(inode, struct exfat_inode_info, vfs_inode); 330 } 331 332 /* 333 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to 334 * save ATTR_RO instead of ->i_mode. 335 * 336 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only 337 * bit, it's just used as flag for app. 338 */ 339 static inline int exfat_mode_can_hold_ro(struct inode *inode) 340 { 341 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); 342 343 if (S_ISDIR(inode->i_mode)) 344 return 0; 345 346 if ((~sbi->options.fs_fmask) & 0222) 347 return 1; 348 return 0; 349 } 350 351 /* Convert attribute bits and a mask to the UNIX mode. */ 352 static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, 353 unsigned short attr, mode_t mode) 354 { 355 if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR)) 356 mode &= ~0222; 357 358 if (attr & ATTR_SUBDIR) 359 return (mode & ~sbi->options.fs_dmask) | S_IFDIR; 360 361 return (mode & ~sbi->options.fs_fmask) | S_IFREG; 362 } 363 364 /* Return the FAT attribute byte for this inode */ 365 static inline unsigned short exfat_make_attr(struct inode *inode) 366 { 367 unsigned short attr = EXFAT_I(inode)->attr; 368 369 if (S_ISDIR(inode->i_mode)) 370 attr |= ATTR_SUBDIR; 371 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) 372 attr |= ATTR_READONLY; 373 return attr; 374 } 375 376 static inline void exfat_save_attr(struct inode *inode, unsigned short attr) 377 { 378 if (exfat_mode_can_hold_ro(inode)) 379 EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY); 380 else 381 EXFAT_I(inode)->attr = attr & ATTR_RWMASK; 382 } 383 384 static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, 385 sector_t sec) 386 { 387 return ((sec - sbi->data_start_sector + 1) & 388 ((1 << sbi->sect_per_clus_bits) - 1)) == 0; 389 } 390 391 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 392 unsigned int clus) 393 { 394 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 395 sbi->data_start_sector; 396 } 397 398 static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 399 sector_t sec) 400 { 401 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 402 EXFAT_RESERVED_CLUSTERS; 403 } 404 405 static inline bool is_valid_cluster(struct exfat_sb_info *sbi, 406 unsigned int clus) 407 { 408 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; 409 } 410 411 /* super.c */ 412 int exfat_set_volume_dirty(struct super_block *sb); 413 int exfat_clear_volume_dirty(struct super_block *sb); 414 415 /* fatent.c */ 416 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 417 418 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 419 struct exfat_chain *p_chain, bool sync_bmap); 420 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 421 int exfat_ent_get(struct super_block *sb, unsigned int loc, 422 unsigned int *content); 423 int exfat_ent_set(struct super_block *sb, unsigned int loc, 424 unsigned int content); 425 int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, 426 int entry, struct exfat_dentry *p_entry); 427 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, 428 unsigned int len); 429 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); 430 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, 431 unsigned int *ret_clu); 432 int exfat_count_num_clusters(struct super_block *sb, 433 struct exfat_chain *p_chain, unsigned int *ret_count); 434 435 /* balloc.c */ 436 int exfat_load_bitmap(struct super_block *sb); 437 void exfat_free_bitmap(struct exfat_sb_info *sbi); 438 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); 439 void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); 440 unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); 441 int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); 442 int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); 443 444 /* file.c */ 445 extern const struct file_operations exfat_file_operations; 446 int __exfat_truncate(struct inode *inode, loff_t new_size); 447 void exfat_truncate(struct inode *inode, loff_t size); 448 int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 449 struct iattr *attr); 450 int exfat_getattr(struct user_namespace *mnt_userns, const struct path *path, 451 struct kstat *stat, unsigned int request_mask, 452 unsigned int query_flags); 453 int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 454 long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 455 long exfat_compat_ioctl(struct file *filp, unsigned int cmd, 456 unsigned long arg); 457 458 /* namei.c */ 459 extern const struct dentry_operations exfat_dentry_ops; 460 extern const struct dentry_operations exfat_utf8_dentry_ops; 461 462 /* cache.c */ 463 int exfat_cache_init(void); 464 void exfat_cache_shutdown(void); 465 void exfat_cache_inval_inode(struct inode *inode); 466 int exfat_get_cluster(struct inode *inode, unsigned int cluster, 467 unsigned int *fclus, unsigned int *dclus, 468 unsigned int *last_dclus, int allow_eof); 469 470 /* dir.c */ 471 extern const struct inode_operations exfat_dir_inode_operations; 472 extern const struct file_operations exfat_dir_operations; 473 unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); 474 int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, 475 int entry, unsigned int type, unsigned int start_clu, 476 unsigned long long size); 477 int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, 478 int entry, int num_entries, struct exfat_uni_name *p_uniname); 479 int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, 480 int entry, int order, int num_entries); 481 int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, 482 int entry); 483 void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); 484 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 485 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, 486 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 487 int num_entries, unsigned int type, struct exfat_hint *hint_opt); 488 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 489 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 490 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 491 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 492 int num); 493 struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb, 494 struct exfat_chain *p_dir, int entry, unsigned int type); 495 int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync); 496 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 497 498 /* inode.c */ 499 extern const struct inode_operations exfat_file_inode_operations; 500 void exfat_sync_inode(struct inode *inode); 501 struct inode *exfat_build_inode(struct super_block *sb, 502 struct exfat_dir_entry *info, loff_t i_pos); 503 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 504 void exfat_unhash_inode(struct inode *inode); 505 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 506 int __exfat_write_inode(struct inode *inode, int sync); 507 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 508 void exfat_evict_inode(struct inode *inode); 509 int exfat_block_truncate_page(struct inode *inode, loff_t from); 510 511 /* exfat/nls.c */ 512 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 513 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 514 unsigned short *b, unsigned int len); 515 int exfat_utf16_to_nls(struct super_block *sb, 516 struct exfat_uni_name *uniname, unsigned char *p_cstring, 517 int len); 518 int exfat_nls_to_utf16(struct super_block *sb, 519 const unsigned char *p_cstring, const int len, 520 struct exfat_uni_name *uniname, int *p_lossy); 521 int exfat_create_upcase_table(struct super_block *sb); 522 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 523 524 /* exfat/misc.c */ 525 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) 526 __printf(3, 4) __cold; 527 #define exfat_fs_error(sb, fmt, args...) \ 528 __exfat_fs_error(sb, 1, fmt, ## args) 529 #define exfat_fs_error_ratelimit(sb, fmt, args...) \ 530 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ 531 fmt, ## args) 532 533 /* expand to pr_*() with prefix */ 534 #define exfat_err(sb, fmt, ...) \ 535 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 536 #define exfat_warn(sb, fmt, ...) \ 537 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 538 #define exfat_info(sb, fmt, ...) \ 539 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 540 #define exfat_debug(sb, fmt, ...) \ 541 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 542 543 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 544 u8 tz, __le16 time, __le16 date, u8 time_cs); 545 void exfat_truncate_atime(struct timespec64 *ts); 546 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 547 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 548 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 549 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 550 void exfat_update_bh(struct buffer_head *bh, int sync); 551 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 552 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 553 unsigned int size, unsigned char flags); 554 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 555 556 #endif /* !_EXFAT_FS_H */ 557