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 IGNORED_BITS_REMAINED(clu, clu_base) ((1UL << ((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 loff_t valid_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 /* Support creating zero-size directory, default: false */ 238 bool zero_size_dir; 239 }; 240 241 /* 242 * EXFAT file system superblock in-memory data 243 */ 244 struct exfat_sb_info { 245 unsigned long long num_sectors; /* num of sectors in volume */ 246 unsigned int num_clusters; /* num of clusters in volume */ 247 unsigned int cluster_size; /* cluster size in bytes */ 248 unsigned int cluster_size_bits; 249 unsigned int sect_per_clus; /* cluster size in sectors */ 250 unsigned int sect_per_clus_bits; 251 unsigned long long FAT1_start_sector; /* FAT1 start sector */ 252 unsigned long long FAT2_start_sector; /* FAT2 start sector */ 253 unsigned long long data_start_sector; /* data area start sector */ 254 unsigned int num_FAT_sectors; /* num of FAT sectors */ 255 unsigned int root_dir; /* root dir cluster */ 256 unsigned int dentries_per_clu; /* num of dentries per cluster */ 257 unsigned int vol_flags; /* volume flags */ 258 unsigned int vol_flags_persistent; /* volume flags to retain */ 259 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 260 261 unsigned int map_clu; /* allocation bitmap start cluster */ 262 unsigned int map_sectors; /* num of allocation bitmap sectors */ 263 struct buffer_head **vol_amap; /* allocation bitmap */ 264 265 unsigned short *vol_utbl; /* upcase table */ 266 267 unsigned int clu_srch_ptr; /* cluster search pointer */ 268 unsigned int used_clusters; /* number of used clusters */ 269 270 struct mutex s_lock; /* superblock lock */ 271 struct mutex bitmap_lock; /* bitmap lock */ 272 struct exfat_mount_options options; 273 struct nls_table *nls_io; /* Charset used for input and display */ 274 struct ratelimit_state ratelimit; 275 276 spinlock_t inode_hash_lock; 277 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; 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 loff_t valid_size; 321 /* hash by i_location */ 322 struct hlist_node i_hash_fat; 323 /* protect bmap against truncate */ 324 struct rw_semaphore truncate_lock; 325 struct inode vfs_inode; 326 /* File creation time */ 327 struct timespec64 i_crtime; 328 }; 329 330 static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) 331 { 332 return sb->s_fs_info; 333 } 334 335 static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) 336 { 337 return container_of(inode, struct exfat_inode_info, vfs_inode); 338 } 339 340 /* 341 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to 342 * save ATTR_RO instead of ->i_mode. 343 * 344 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only 345 * bit, it's just used as flag for app. 346 */ 347 static inline int exfat_mode_can_hold_ro(struct inode *inode) 348 { 349 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); 350 351 if (S_ISDIR(inode->i_mode)) 352 return 0; 353 354 if ((~sbi->options.fs_fmask) & 0222) 355 return 1; 356 return 0; 357 } 358 359 /* Convert attribute bits and a mask to the UNIX mode. */ 360 static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, 361 unsigned short attr, mode_t mode) 362 { 363 if ((attr & EXFAT_ATTR_READONLY) && !(attr & EXFAT_ATTR_SUBDIR)) 364 mode &= ~0222; 365 366 if (attr & EXFAT_ATTR_SUBDIR) 367 return (mode & ~sbi->options.fs_dmask) | S_IFDIR; 368 369 return (mode & ~sbi->options.fs_fmask) | S_IFREG; 370 } 371 372 /* Return the FAT attribute byte for this inode */ 373 static inline unsigned short exfat_make_attr(struct inode *inode) 374 { 375 unsigned short attr = EXFAT_I(inode)->attr; 376 377 if (S_ISDIR(inode->i_mode)) 378 attr |= EXFAT_ATTR_SUBDIR; 379 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) 380 attr |= EXFAT_ATTR_READONLY; 381 return attr; 382 } 383 384 static inline void exfat_save_attr(struct inode *inode, unsigned short attr) 385 { 386 if (exfat_mode_can_hold_ro(inode)) 387 EXFAT_I(inode)->attr = attr & (EXFAT_ATTR_RWMASK | EXFAT_ATTR_READONLY); 388 else 389 EXFAT_I(inode)->attr = attr & EXFAT_ATTR_RWMASK; 390 } 391 392 static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, 393 sector_t sec) 394 { 395 return ((sec - sbi->data_start_sector + 1) & 396 ((1 << sbi->sect_per_clus_bits) - 1)) == 0; 397 } 398 399 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 400 unsigned int clus) 401 { 402 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 403 sbi->data_start_sector; 404 } 405 406 static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 407 sector_t sec) 408 { 409 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 410 EXFAT_RESERVED_CLUSTERS; 411 } 412 413 static inline bool is_valid_cluster(struct exfat_sb_info *sbi, 414 unsigned int clus) 415 { 416 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; 417 } 418 419 /* super.c */ 420 int exfat_set_volume_dirty(struct super_block *sb); 421 int exfat_clear_volume_dirty(struct super_block *sb); 422 423 /* fatent.c */ 424 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 425 426 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 427 struct exfat_chain *p_chain, bool sync_bmap); 428 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 429 int exfat_ent_get(struct super_block *sb, unsigned int loc, 430 unsigned int *content); 431 int exfat_ent_set(struct super_block *sb, unsigned int loc, 432 unsigned int content); 433 int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir, 434 int entry, struct exfat_dentry *p_entry); 435 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, 436 unsigned int len); 437 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); 438 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, 439 unsigned int *ret_clu); 440 int exfat_count_num_clusters(struct super_block *sb, 441 struct exfat_chain *p_chain, unsigned int *ret_count); 442 443 /* balloc.c */ 444 int exfat_load_bitmap(struct super_block *sb); 445 void exfat_free_bitmap(struct exfat_sb_info *sbi); 446 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); 447 void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); 448 unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); 449 int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); 450 int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); 451 452 /* file.c */ 453 extern const struct file_operations exfat_file_operations; 454 int __exfat_truncate(struct inode *inode); 455 void exfat_truncate(struct inode *inode); 456 int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 457 struct iattr *attr); 458 int exfat_getattr(struct mnt_idmap *idmap, const struct path *path, 459 struct kstat *stat, unsigned int request_mask, 460 unsigned int query_flags); 461 int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 462 long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 463 long exfat_compat_ioctl(struct file *filp, unsigned int cmd, 464 unsigned long arg); 465 466 /* namei.c */ 467 extern const struct dentry_operations exfat_dentry_ops; 468 extern const struct dentry_operations exfat_utf8_dentry_ops; 469 470 /* cache.c */ 471 int exfat_cache_init(void); 472 void exfat_cache_shutdown(void); 473 void exfat_cache_inval_inode(struct inode *inode); 474 int exfat_get_cluster(struct inode *inode, unsigned int cluster, 475 unsigned int *fclus, unsigned int *dclus, 476 unsigned int *last_dclus, int allow_eof); 477 478 /* dir.c */ 479 extern const struct inode_operations exfat_dir_inode_operations; 480 extern const struct file_operations exfat_dir_operations; 481 unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); 482 int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, 483 int entry, unsigned int type, unsigned int start_clu, 484 unsigned long long size); 485 int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir, 486 int entry, int num_entries, struct exfat_uni_name *p_uniname); 487 int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir, 488 int entry, int order, int num_entries); 489 int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir, 490 int entry); 491 void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es); 492 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 493 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, 494 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 495 struct exfat_hint *hint_opt); 496 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 497 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 498 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 499 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 500 int num); 501 int exfat_get_dentry_set(struct exfat_entry_set_cache *es, 502 struct super_block *sb, struct exfat_chain *p_dir, int entry, 503 unsigned int type); 504 int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); 505 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 506 507 /* inode.c */ 508 extern const struct inode_operations exfat_file_inode_operations; 509 void exfat_sync_inode(struct inode *inode); 510 struct inode *exfat_build_inode(struct super_block *sb, 511 struct exfat_dir_entry *info, loff_t i_pos); 512 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 513 void exfat_unhash_inode(struct inode *inode); 514 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 515 int __exfat_write_inode(struct inode *inode, int sync); 516 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 517 void exfat_evict_inode(struct inode *inode); 518 int exfat_block_truncate_page(struct inode *inode, loff_t from); 519 520 /* exfat/nls.c */ 521 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 522 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 523 unsigned short *b, unsigned int len); 524 int exfat_utf16_to_nls(struct super_block *sb, 525 struct exfat_uni_name *uniname, unsigned char *p_cstring, 526 int len); 527 int exfat_nls_to_utf16(struct super_block *sb, 528 const unsigned char *p_cstring, const int len, 529 struct exfat_uni_name *uniname, int *p_lossy); 530 int exfat_create_upcase_table(struct super_block *sb); 531 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 532 533 /* exfat/misc.c */ 534 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) 535 __printf(3, 4) __cold; 536 #define exfat_fs_error(sb, fmt, args...) \ 537 __exfat_fs_error(sb, 1, fmt, ## args) 538 #define exfat_fs_error_ratelimit(sb, fmt, args...) \ 539 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ 540 fmt, ## args) 541 542 /* expand to pr_*() with prefix */ 543 #define exfat_err(sb, fmt, ...) \ 544 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 545 #define exfat_warn(sb, fmt, ...) \ 546 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 547 #define exfat_info(sb, fmt, ...) \ 548 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 549 #define exfat_debug(sb, fmt, ...) \ 550 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 551 552 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 553 u8 tz, __le16 time, __le16 date, u8 time_cs); 554 void exfat_truncate_atime(struct timespec64 *ts); 555 void exfat_truncate_inode_atime(struct inode *inode); 556 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 557 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 558 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 559 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 560 void exfat_update_bh(struct buffer_head *bh, int sync); 561 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 562 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 563 unsigned int size, unsigned char flags); 564 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 565 566 #endif /* !_EXFAT_FS_H */ 567