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(b) ((b) >> DENTRY_SIZE_BITS) 105 #define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS) 106 107 /* 108 * helpers for cluster size to dentry size conversion. 109 */ 110 #define EXFAT_CLU_TO_DEN(clu, sbi) \ 111 ((clu) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) 112 #define EXFAT_DEN_TO_CLU(dentry, sbi) \ 113 ((dentry) >> ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) 114 115 /* 116 * helpers for fat entry. 117 */ 118 #define FAT_ENT_SIZE (4) 119 #define FAT_ENT_SIZE_BITS (2) 120 #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \ 121 (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits)) 122 #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \ 123 ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1)) 124 125 /* 126 * helpers for bitmap. 127 */ 128 #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS) 129 #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS) 130 #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE) 131 #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1) 132 #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \ 133 ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits) 134 #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb)) 135 #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \ 136 ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1)) 137 #define BITS_PER_BYTE_MASK 0x7 138 #define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((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 unsigned int num_subdirs; 211 struct timespec64 atime; 212 struct timespec64 mtime; 213 struct timespec64 crtime; 214 struct exfat_dentry_namebuf namebuf; 215 }; 216 217 /* 218 * exfat mount in-memory data 219 */ 220 struct exfat_mount_options { 221 kuid_t fs_uid; 222 kgid_t fs_gid; 223 unsigned short fs_fmask; 224 unsigned short fs_dmask; 225 /* permission for setting the [am]time */ 226 unsigned short allow_utime; 227 /* charset for filename input/display */ 228 char *iocharset; 229 /* on error: continue, panic, remount-ro */ 230 enum exfat_error_mode errors; 231 unsigned utf8:1, /* Use of UTF-8 character set */ 232 sys_tz:1, /* Use local timezone */ 233 discard:1, /* Issue discard requests on deletions */ 234 keep_last_dots:1; /* Keep trailing periods in paths */ 235 int time_offset; /* Offset of timestamps from UTC (in minutes) */ 236 }; 237 238 /* 239 * EXFAT file system superblock in-memory data 240 */ 241 struct exfat_sb_info { 242 unsigned long long num_sectors; /* num of sectors in volume */ 243 unsigned int num_clusters; /* num of clusters in volume */ 244 unsigned int cluster_size; /* cluster size in bytes */ 245 unsigned int cluster_size_bits; 246 unsigned int sect_per_clus; /* cluster size in sectors */ 247 unsigned int sect_per_clus_bits; 248 unsigned long long FAT1_start_sector; /* FAT1 start sector */ 249 unsigned long long FAT2_start_sector; /* FAT2 start sector */ 250 unsigned long long data_start_sector; /* data area start sector */ 251 unsigned int num_FAT_sectors; /* num of FAT sectors */ 252 unsigned int root_dir; /* root dir cluster */ 253 unsigned int dentries_per_clu; /* num of dentries per cluster */ 254 unsigned int vol_flags; /* volume flags */ 255 unsigned int vol_flags_persistent; /* volume flags to retain */ 256 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 257 258 unsigned int map_clu; /* allocation bitmap start cluster */ 259 unsigned int map_sectors; /* num of allocation bitmap sectors */ 260 struct buffer_head **vol_amap; /* allocation bitmap */ 261 262 unsigned short *vol_utbl; /* upcase table */ 263 264 unsigned int clu_srch_ptr; /* cluster search pointer */ 265 unsigned int used_clusters; /* number of used clusters */ 266 267 struct mutex s_lock; /* superblock lock */ 268 struct mutex bitmap_lock; /* bitmap lock */ 269 struct exfat_mount_options options; 270 struct nls_table *nls_io; /* Charset used for input and display */ 271 struct ratelimit_state ratelimit; 272 273 spinlock_t inode_hash_lock; 274 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; 275 276 struct rcu_head rcu; 277 }; 278 279 #define EXFAT_CACHE_VALID 0 280 281 /* 282 * EXFAT file system inode in-memory data 283 */ 284 struct exfat_inode_info { 285 struct exfat_chain dir; 286 int entry; 287 unsigned int type; 288 unsigned short attr; 289 unsigned int start_clu; 290 unsigned char flags; 291 /* 292 * the copy of low 32bit of i_version to check 293 * the validation of hint_stat. 294 */ 295 unsigned int version; 296 297 /* hint for cluster last accessed */ 298 struct exfat_hint hint_bmap; 299 /* hint for entry index we try to lookup next time */ 300 struct exfat_hint hint_stat; 301 /* hint for first empty entry */ 302 struct exfat_hint_femp hint_femp; 303 304 spinlock_t cache_lru_lock; 305 struct list_head cache_lru; 306 int nr_caches; 307 /* for avoiding the race between alloc and free */ 308 unsigned int cache_valid_id; 309 310 /* 311 * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access. 312 * physically allocated size. 313 */ 314 loff_t i_size_ondisk; 315 /* block-aligned i_size (used in cont_write_begin) */ 316 loff_t i_size_aligned; 317 /* on-disk position of directory entry or 0 */ 318 loff_t i_pos; 319 /* hash by i_location */ 320 struct hlist_node i_hash_fat; 321 /* protect bmap against truncate */ 322 struct rw_semaphore truncate_lock; 323 struct inode vfs_inode; 324 /* File creation time */ 325 struct timespec64 i_crtime; 326 }; 327 328 static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) 329 { 330 return sb->s_fs_info; 331 } 332 333 static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) 334 { 335 return container_of(inode, struct exfat_inode_info, vfs_inode); 336 } 337 338 /* 339 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to 340 * save ATTR_RO instead of ->i_mode. 341 * 342 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only 343 * bit, it's just used as flag for app. 344 */ 345 static inline int exfat_mode_can_hold_ro(struct inode *inode) 346 { 347 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); 348 349 if (S_ISDIR(inode->i_mode)) 350 return 0; 351 352 if ((~sbi->options.fs_fmask) & 0222) 353 return 1; 354 return 0; 355 } 356 357 /* Convert attribute bits and a mask to the UNIX mode. */ 358 static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, 359 unsigned short attr, mode_t mode) 360 { 361 if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR)) 362 mode &= ~0222; 363 364 if (attr & ATTR_SUBDIR) 365 return (mode & ~sbi->options.fs_dmask) | S_IFDIR; 366 367 return (mode & ~sbi->options.fs_fmask) | S_IFREG; 368 } 369 370 /* Return the FAT attribute byte for this inode */ 371 static inline unsigned short exfat_make_attr(struct inode *inode) 372 { 373 unsigned short attr = EXFAT_I(inode)->attr; 374 375 if (S_ISDIR(inode->i_mode)) 376 attr |= ATTR_SUBDIR; 377 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) 378 attr |= ATTR_READONLY; 379 return attr; 380 } 381 382 static inline void exfat_save_attr(struct inode *inode, unsigned short attr) 383 { 384 if (exfat_mode_can_hold_ro(inode)) 385 EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY); 386 else 387 EXFAT_I(inode)->attr = attr & ATTR_RWMASK; 388 } 389 390 static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, 391 sector_t sec) 392 { 393 return ((sec - sbi->data_start_sector + 1) & 394 ((1 << sbi->sect_per_clus_bits) - 1)) == 0; 395 } 396 397 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 398 unsigned int clus) 399 { 400 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 401 sbi->data_start_sector; 402 } 403 404 static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 405 sector_t sec) 406 { 407 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 408 EXFAT_RESERVED_CLUSTERS; 409 } 410 411 static inline bool is_valid_cluster(struct exfat_sb_info *sbi, 412 unsigned int clus) 413 { 414 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; 415 } 416 417 /* super.c */ 418 int exfat_set_volume_dirty(struct super_block *sb); 419 int exfat_clear_volume_dirty(struct super_block *sb); 420 421 /* fatent.c */ 422 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 423 424 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 425 struct exfat_chain *p_chain, bool sync_bmap); 426 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 427 int exfat_ent_get(struct super_block *sb, unsigned int loc, 428 unsigned int *content); 429 int exfat_ent_set(struct super_block *sb, unsigned int loc, 430 unsigned int content); 431 int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, 432 int entry, struct exfat_dentry *p_entry); 433 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, 434 unsigned int len); 435 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); 436 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, 437 unsigned int *ret_clu); 438 int exfat_count_num_clusters(struct super_block *sb, 439 struct exfat_chain *p_chain, unsigned int *ret_count); 440 441 /* balloc.c */ 442 int exfat_load_bitmap(struct super_block *sb); 443 void exfat_free_bitmap(struct exfat_sb_info *sbi); 444 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); 445 void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); 446 unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); 447 int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); 448 int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); 449 450 /* file.c */ 451 extern const struct file_operations exfat_file_operations; 452 int __exfat_truncate(struct inode *inode, loff_t new_size); 453 void exfat_truncate(struct inode *inode, loff_t size); 454 int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 455 struct iattr *attr); 456 int exfat_getattr(struct user_namespace *mnt_userns, const struct path *path, 457 struct kstat *stat, unsigned int request_mask, 458 unsigned int query_flags); 459 int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 460 long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 461 long exfat_compat_ioctl(struct file *filp, unsigned int cmd, 462 unsigned long arg); 463 464 /* namei.c */ 465 extern const struct dentry_operations exfat_dentry_ops; 466 extern const struct dentry_operations exfat_utf8_dentry_ops; 467 468 /* cache.c */ 469 int exfat_cache_init(void); 470 void exfat_cache_shutdown(void); 471 void exfat_cache_inval_inode(struct inode *inode); 472 int exfat_get_cluster(struct inode *inode, unsigned int cluster, 473 unsigned int *fclus, unsigned int *dclus, 474 unsigned int *last_dclus, int allow_eof); 475 476 /* dir.c */ 477 extern const struct inode_operations exfat_dir_inode_operations; 478 extern const struct file_operations exfat_dir_operations; 479 unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); 480 int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, 481 int entry, unsigned int type, unsigned int start_clu, 482 unsigned long long size); 483 int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, 484 int entry, int num_entries, struct exfat_uni_name *p_uniname); 485 int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, 486 int entry, int order, int num_entries); 487 int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, 488 int entry); 489 void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); 490 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 491 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, 492 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 493 int num_entries, unsigned int type, struct exfat_hint *hint_opt); 494 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 495 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 496 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 497 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 498 int num); 499 int exfat_get_dentry_set(struct exfat_entry_set_cache *es, 500 struct super_block *sb, struct exfat_chain *p_dir, int entry, 501 unsigned int type); 502 int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); 503 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 504 505 /* inode.c */ 506 extern const struct inode_operations exfat_file_inode_operations; 507 void exfat_sync_inode(struct inode *inode); 508 struct inode *exfat_build_inode(struct super_block *sb, 509 struct exfat_dir_entry *info, loff_t i_pos); 510 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 511 void exfat_unhash_inode(struct inode *inode); 512 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 513 int __exfat_write_inode(struct inode *inode, int sync); 514 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 515 void exfat_evict_inode(struct inode *inode); 516 int exfat_block_truncate_page(struct inode *inode, loff_t from); 517 518 /* exfat/nls.c */ 519 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 520 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 521 unsigned short *b, unsigned int len); 522 int exfat_utf16_to_nls(struct super_block *sb, 523 struct exfat_uni_name *uniname, unsigned char *p_cstring, 524 int len); 525 int exfat_nls_to_utf16(struct super_block *sb, 526 const unsigned char *p_cstring, const int len, 527 struct exfat_uni_name *uniname, int *p_lossy); 528 int exfat_create_upcase_table(struct super_block *sb); 529 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 530 531 /* exfat/misc.c */ 532 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) 533 __printf(3, 4) __cold; 534 #define exfat_fs_error(sb, fmt, args...) \ 535 __exfat_fs_error(sb, 1, fmt, ## args) 536 #define exfat_fs_error_ratelimit(sb, fmt, args...) \ 537 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ 538 fmt, ## args) 539 540 /* expand to pr_*() with prefix */ 541 #define exfat_err(sb, fmt, ...) \ 542 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 543 #define exfat_warn(sb, fmt, ...) \ 544 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 545 #define exfat_info(sb, fmt, ...) \ 546 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 547 #define exfat_debug(sb, fmt, ...) \ 548 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 549 550 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 551 u8 tz, __le16 time, __le16 date, u8 time_cs); 552 void exfat_truncate_atime(struct timespec64 *ts); 553 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 554 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 555 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 556 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 557 void exfat_update_bh(struct buffer_head *bh, int sync); 558 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 559 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 560 unsigned int size, unsigned char flags); 561 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 562 563 #endif /* !_EXFAT_FS_H */ 564