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 BITS_PER_BYTE_MASK 0x7 139 #define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1) 140 141 #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) 151 152 struct exfat_dentry_namebuf { 153 char *lfn; 154 int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */ 155 }; 156 157 /* unicode name structure */ 158 struct exfat_uni_name { 159 /* +3 for null and for converting */ 160 unsigned short name[MAX_NAME_LENGTH + 3]; 161 u16 name_hash; 162 unsigned char name_len; 163 }; 164 165 /* directory structure */ 166 struct exfat_chain { 167 unsigned int dir; 168 unsigned int size; 169 unsigned char flags; 170 }; 171 172 /* first empty entry hint information */ 173 struct 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 */ 183 struct exfat_hint { 184 unsigned int clu; 185 union { 186 unsigned int off; /* cluster offset */ 187 int eidx; /* entry index */ 188 }; 189 }; 190 191 struct exfat_entry_set_cache { 192 struct super_block *sb; 193 unsigned int start_off; 194 int num_bh; 195 struct buffer_head *__bh[DIR_CACHE_SIZE]; 196 struct buffer_head **bh; 197 unsigned int num_entries; 198 bool modified; 199 }; 200 201 #define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh) 202 203 struct 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 */ 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 }; 238 239 /* 240 * EXFAT file system superblock in-memory data 241 */ 242 struct 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 */ 255 unsigned int vol_flags; /* volume flags */ 256 unsigned int vol_flags_persistent; /* volume flags to retain */ 257 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 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 */ 267 268 struct mutex s_lock; /* superblock lock */ 269 struct mutex bitmap_lock; /* bitmap lock */ 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 }; 279 280 #define EXFAT_CACHE_VALID 0 281 282 /* 283 * EXFAT file system inode in-memory data 284 */ 285 struct 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; 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 }; 328 329 static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) 330 { 331 return sb->s_fs_info; 332 } 333 334 static 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 */ 346 static 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. */ 359 static 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 */ 372 static 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 } 382 383 static 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 } 390 391 static 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 } 397 398 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 399 unsigned int clus) 400 { 401 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 402 sbi->data_start_sector; 403 } 404 405 static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 406 sector_t sec) 407 { 408 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 409 EXFAT_RESERVED_CLUSTERS; 410 } 411 412 static 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 } 417 418 /* super.c */ 419 int exfat_set_volume_dirty(struct super_block *sb); 420 int exfat_clear_volume_dirty(struct super_block *sb); 421 422 /* fatent.c */ 423 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 424 425 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 426 struct exfat_chain *p_chain, bool sync_bmap); 427 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 428 int exfat_ent_get(struct super_block *sb, unsigned int loc, 429 unsigned int *content); 430 int exfat_ent_set(struct super_block *sb, unsigned int loc, 431 unsigned int content); 432 int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, 433 int entry, struct exfat_dentry *p_entry); 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 int 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); 484 int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, 485 int entry, int num_entries, struct exfat_uni_name *p_uniname); 486 int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, 487 int entry, int order, int num_entries); 488 int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, 489 int entry); 490 void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); 491 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 492 int 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, 494 struct exfat_hint *hint_opt); 495 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 496 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 497 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 498 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 499 int num); 500 int 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); 503 int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); 504 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 505 506 /* inode.c */ 507 extern const struct inode_operations exfat_file_inode_operations; 508 void exfat_sync_inode(struct inode *inode); 509 struct inode *exfat_build_inode(struct super_block *sb, 510 struct exfat_dir_entry *info, loff_t i_pos); 511 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 512 void exfat_unhash_inode(struct inode *inode); 513 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 514 int __exfat_write_inode(struct inode *inode, int sync); 515 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 516 void exfat_evict_inode(struct inode *inode); 517 int exfat_block_truncate_page(struct inode *inode, loff_t from); 518 519 /* exfat/nls.c */ 520 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 521 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 522 unsigned short *b, unsigned int len); 523 int exfat_utf16_to_nls(struct super_block *sb, 524 struct exfat_uni_name *uniname, unsigned char *p_cstring, 525 int len); 526 int 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); 529 int exfat_create_upcase_table(struct super_block *sb); 530 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 531 532 /* exfat/misc.c */ 533 void __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) 540 541 /* expand to pr_*() with prefix */ 542 #define exfat_err(sb, fmt, ...) \ 543 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 544 #define exfat_warn(sb, fmt, ...) \ 545 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 546 #define exfat_info(sb, fmt, ...) \ 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__) 550 551 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 552 u8 tz, __le16 time, __le16 date, u8 time_cs); 553 void exfat_truncate_atime(struct timespec64 *ts); 554 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 555 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 556 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 557 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 558 void exfat_update_bh(struct buffer_head *bh, int sync); 559 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 560 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 561 unsigned int size, unsigned char flags); 562 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 563 564 #endif /* !_EXFAT_FS_H */ 565