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 #include <uapi/linux/exfat.h> 14 15 #define EXFAT_ROOT_INO 1 16 17 #define EXFAT_CLUSTERS_UNTRACKED (~0u) 18 19 /* 20 * exfat error flags 21 */ 22 enum exfat_error_mode { 23 EXFAT_ERRORS_CONT, /* ignore error and continue */ 24 EXFAT_ERRORS_PANIC, /* panic on error */ 25 EXFAT_ERRORS_RO, /* remount r/o on error */ 26 }; 27 28 /* 29 * exfat nls lossy flag 30 */ 31 enum { 32 NLS_NAME_NO_LOSSY = 0, /* no lossy */ 33 NLS_NAME_LOSSY = 1 << 0, /* just detected incorrect filename(s) */ 34 NLS_NAME_OVERLEN = 1 << 1, /* the length is over than its limit */ 35 }; 36 37 #define EXFAT_HASH_BITS 8 38 #define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS) 39 40 /* 41 * Type Definitions 42 */ 43 #define ES_2_ENTRIES 2 44 #define ES_ALL_ENTRIES 0 45 46 #define ES_IDX_FILE 0 47 #define ES_IDX_STREAM 1 48 #define ES_IDX_FIRST_FILENAME 2 49 #define EXFAT_FILENAME_ENTRY_NUM(name_len) \ 50 DIV_ROUND_UP(name_len, EXFAT_FILE_NAME_LEN) 51 #define ES_IDX_LAST_FILENAME(name_len) \ 52 (ES_IDX_FIRST_FILENAME + EXFAT_FILENAME_ENTRY_NUM(name_len) - 1) 53 54 #define DIR_DELETED 0xFFFFFFF7 55 56 /* type values */ 57 #define TYPE_UNUSED 0x0000 58 #define TYPE_DELETED 0x0001 59 #define TYPE_INVALID 0x0002 60 #define TYPE_CRITICAL_PRI 0x0100 61 #define TYPE_BITMAP 0x0101 62 #define TYPE_UPCASE 0x0102 63 #define TYPE_VOLUME 0x0103 64 #define TYPE_DIR 0x0104 65 #define TYPE_FILE 0x011F 66 #define TYPE_CRITICAL_SEC 0x0200 67 #define TYPE_STREAM 0x0201 68 #define TYPE_EXTEND 0x0202 69 #define TYPE_ACL 0x0203 70 #define TYPE_BENIGN_PRI 0x0400 71 #define TYPE_GUID 0x0401 72 #define TYPE_PADDING 0x0402 73 #define TYPE_ACLTAB 0x0403 74 #define TYPE_BENIGN_SEC 0x0800 75 #define TYPE_VENDOR_EXT 0x0801 76 #define TYPE_VENDOR_ALLOC 0x0802 77 78 #define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */ 79 #define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */ 80 #define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE) 81 82 #define EXFAT_HINT_NONE -1 83 #define EXFAT_MIN_SUBDIR 2 84 85 /* 86 * helpers for cluster size to byte conversion. 87 */ 88 #define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits) 89 #define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits) 90 #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \ 91 (((b - 1) >> (sbi)->cluster_size_bits) + 1) 92 #define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1)) 93 94 /* 95 * helpers for block size to byte conversion. 96 */ 97 #define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits) 98 #define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits) 99 #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \ 100 (((b - 1) >> (sb)->s_blocksize_bits) + 1) 101 #define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1)) 102 103 /* 104 * helpers for block size to dentry size conversion. 105 */ 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 cluster size to dentry size conversion. 111 */ 112 #define EXFAT_CLU_TO_DEN(clu, sbi) \ 113 ((clu) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) 114 #define EXFAT_DEN_TO_CLU(dentry, sbi) \ 115 ((dentry) >> ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS)) 116 117 /* 118 * helpers for fat entry. 119 */ 120 #define FAT_ENT_SIZE (4) 121 #define FAT_ENT_SIZE_BITS (2) 122 #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \ 123 (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits)) 124 #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \ 125 ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1)) 126 127 /* 128 * helpers for bitmap. 129 */ 130 #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS) 131 #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS) 132 #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE) 133 #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1) 134 #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \ 135 ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits) 136 #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb)) 137 #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \ 138 ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1)) 139 #define IGNORED_BITS_REMAINED(clu, clu_base) ((1UL << ((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 /* Superblock flags */ 153 #define EXFAT_FLAGS_SHUTDOWN 1 154 155 struct exfat_dentry_namebuf { 156 char *lfn; 157 int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */ 158 }; 159 160 /* unicode name structure */ 161 struct exfat_uni_name { 162 /* +3 for null and for converting */ 163 unsigned short name[MAX_NAME_LENGTH + 3]; 164 u16 name_hash; 165 unsigned char name_len; 166 }; 167 168 /* directory structure */ 169 struct exfat_chain { 170 unsigned int dir; 171 unsigned int size; 172 unsigned char flags; 173 }; 174 175 /* first empty entry hint information */ 176 struct exfat_hint_femp { 177 /* entry index of a directory */ 178 int eidx; 179 /* count of continuous empty entry */ 180 int count; 181 /* the cluster that first empty slot exists in */ 182 struct exfat_chain cur; 183 }; 184 185 /* hint structure */ 186 struct exfat_hint { 187 unsigned int clu; 188 union { 189 unsigned int off; /* cluster offset */ 190 int eidx; /* entry index */ 191 }; 192 }; 193 194 struct exfat_entry_set_cache { 195 struct super_block *sb; 196 unsigned int start_off; 197 int num_bh; 198 struct buffer_head *__bh[DIR_CACHE_SIZE]; 199 struct buffer_head **bh; 200 unsigned int num_entries; 201 bool modified; 202 }; 203 204 #define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh) 205 206 struct exfat_dir_entry { 207 struct exfat_chain dir; 208 int entry; 209 unsigned int type; 210 unsigned int start_clu; 211 unsigned char flags; 212 unsigned short attr; 213 loff_t size; 214 loff_t valid_size; 215 unsigned int num_subdirs; 216 struct timespec64 atime; 217 struct timespec64 mtime; 218 struct timespec64 crtime; 219 struct exfat_dentry_namebuf namebuf; 220 }; 221 222 /* 223 * exfat mount in-memory data 224 */ 225 struct exfat_mount_options { 226 kuid_t fs_uid; 227 kgid_t fs_gid; 228 unsigned short fs_fmask; 229 unsigned short fs_dmask; 230 /* permission for setting the [am]time */ 231 unsigned short allow_utime; 232 /* charset for filename input/display */ 233 char *iocharset; 234 /* on error: continue, panic, remount-ro */ 235 enum exfat_error_mode errors; 236 unsigned utf8:1, /* Use of UTF-8 character set */ 237 sys_tz:1, /* Use local timezone */ 238 discard:1, /* Issue discard requests on deletions */ 239 keep_last_dots:1; /* Keep trailing periods in paths */ 240 int time_offset; /* Offset of timestamps from UTC (in minutes) */ 241 /* Support creating zero-size directory, default: false */ 242 bool zero_size_dir; 243 }; 244 245 /* 246 * EXFAT file system superblock in-memory data 247 */ 248 struct exfat_sb_info { 249 unsigned long long num_sectors; /* num of sectors in volume */ 250 unsigned int num_clusters; /* num of clusters in volume */ 251 unsigned int cluster_size; /* cluster size in bytes */ 252 unsigned int cluster_size_bits; 253 unsigned int sect_per_clus; /* cluster size in sectors */ 254 unsigned int sect_per_clus_bits; 255 unsigned long long FAT1_start_sector; /* FAT1 start sector */ 256 unsigned long long FAT2_start_sector; /* FAT2 start sector */ 257 unsigned long long data_start_sector; /* data area start sector */ 258 unsigned int num_FAT_sectors; /* num of FAT sectors */ 259 unsigned int root_dir; /* root dir cluster */ 260 unsigned int dentries_per_clu; /* num of dentries per cluster */ 261 unsigned int vol_flags; /* volume flags */ 262 unsigned int vol_flags_persistent; /* volume flags to retain */ 263 struct buffer_head *boot_bh; /* buffer_head of BOOT sector */ 264 265 unsigned int map_clu; /* allocation bitmap start cluster */ 266 unsigned int map_sectors; /* num of allocation bitmap sectors */ 267 struct buffer_head **vol_amap; /* allocation bitmap */ 268 269 unsigned short *vol_utbl; /* upcase table */ 270 271 unsigned int clu_srch_ptr; /* cluster search pointer */ 272 unsigned int used_clusters; /* number of used clusters */ 273 274 unsigned long s_exfat_flags; /* Exfat superblock flags */ 275 276 struct mutex s_lock; /* superblock lock */ 277 struct mutex bitmap_lock; /* bitmap lock */ 278 struct exfat_mount_options options; 279 struct nls_table *nls_io; /* Charset used for input and display */ 280 struct ratelimit_state ratelimit; 281 282 spinlock_t inode_hash_lock; 283 struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; 284 struct rcu_head rcu; 285 }; 286 287 #define EXFAT_CACHE_VALID 0 288 289 /* 290 * EXFAT file system inode in-memory data 291 */ 292 struct exfat_inode_info { 293 struct exfat_chain dir; 294 int entry; 295 unsigned int type; 296 unsigned short attr; 297 unsigned int start_clu; 298 unsigned char flags; 299 /* 300 * the copy of low 32bit of i_version to check 301 * the validation of hint_stat. 302 */ 303 unsigned int version; 304 305 /* hint for cluster last accessed */ 306 struct exfat_hint hint_bmap; 307 /* hint for entry index we try to lookup next time */ 308 struct exfat_hint hint_stat; 309 /* hint for first empty entry */ 310 struct exfat_hint_femp hint_femp; 311 312 spinlock_t cache_lru_lock; 313 struct list_head cache_lru; 314 int nr_caches; 315 /* for avoiding the race between alloc and free */ 316 unsigned int cache_valid_id; 317 318 /* 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 static inline int exfat_forced_shutdown(struct super_block *sb) 341 { 342 return test_bit(EXFAT_FLAGS_SHUTDOWN, &EXFAT_SB(sb)->s_exfat_flags); 343 } 344 345 /* 346 * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to 347 * save ATTR_RO instead of ->i_mode. 348 * 349 * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only 350 * bit, it's just used as flag for app. 351 */ 352 static inline int exfat_mode_can_hold_ro(struct inode *inode) 353 { 354 struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); 355 356 if (S_ISDIR(inode->i_mode)) 357 return 0; 358 359 if ((~sbi->options.fs_fmask) & 0222) 360 return 1; 361 return 0; 362 } 363 364 /* Convert attribute bits and a mask to the UNIX mode. */ 365 static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, 366 unsigned short attr, mode_t mode) 367 { 368 if ((attr & EXFAT_ATTR_READONLY) && !(attr & EXFAT_ATTR_SUBDIR)) 369 mode &= ~0222; 370 371 if (attr & EXFAT_ATTR_SUBDIR) 372 return (mode & ~sbi->options.fs_dmask) | S_IFDIR; 373 374 return (mode & ~sbi->options.fs_fmask) | S_IFREG; 375 } 376 377 /* Return the FAT attribute byte for this inode */ 378 static inline unsigned short exfat_make_attr(struct inode *inode) 379 { 380 unsigned short attr = EXFAT_I(inode)->attr; 381 382 if (S_ISDIR(inode->i_mode)) 383 attr |= EXFAT_ATTR_SUBDIR; 384 if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222)) 385 attr |= EXFAT_ATTR_READONLY; 386 return attr; 387 } 388 389 static inline void exfat_save_attr(struct inode *inode, unsigned short attr) 390 { 391 if (exfat_mode_can_hold_ro(inode)) 392 EXFAT_I(inode)->attr = attr & (EXFAT_ATTR_RWMASK | EXFAT_ATTR_READONLY); 393 else 394 EXFAT_I(inode)->attr = attr & EXFAT_ATTR_RWMASK; 395 } 396 397 static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, 398 sector_t sec) 399 { 400 return ((sec - sbi->data_start_sector + 1) & 401 ((1 << sbi->sect_per_clus_bits) - 1)) == 0; 402 } 403 404 static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, 405 unsigned int clus) 406 { 407 return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) + 408 sbi->data_start_sector; 409 } 410 411 static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, 412 sector_t sec) 413 { 414 return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + 415 EXFAT_RESERVED_CLUSTERS; 416 } 417 418 static inline bool is_valid_cluster(struct exfat_sb_info *sbi, 419 unsigned int clus) 420 { 421 return clus >= EXFAT_FIRST_CLUSTER && clus < sbi->num_clusters; 422 } 423 424 static inline loff_t exfat_ondisk_size(const struct inode *inode) 425 { 426 return ((loff_t)inode->i_blocks) << 9; 427 } 428 429 /* super.c */ 430 int exfat_set_volume_dirty(struct super_block *sb); 431 int exfat_clear_volume_dirty(struct super_block *sb); 432 433 /* fatent.c */ 434 #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu) 435 436 int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, 437 struct exfat_chain *p_chain, bool sync_bmap); 438 int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); 439 int exfat_ent_get(struct super_block *sb, unsigned int loc, 440 unsigned int *content); 441 int exfat_ent_set(struct super_block *sb, unsigned int loc, 442 unsigned int content); 443 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, 444 unsigned int len); 445 int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); 446 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, 447 unsigned int *ret_clu); 448 int exfat_count_num_clusters(struct super_block *sb, 449 struct exfat_chain *p_chain, unsigned int *ret_count); 450 451 /* balloc.c */ 452 int exfat_load_bitmap(struct super_block *sb); 453 void exfat_free_bitmap(struct exfat_sb_info *sbi); 454 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); 455 void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); 456 unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); 457 int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); 458 int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); 459 460 /* file.c */ 461 extern const struct file_operations exfat_file_operations; 462 int __exfat_truncate(struct inode *inode); 463 void exfat_truncate(struct inode *inode); 464 int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 465 struct iattr *attr); 466 int exfat_getattr(struct mnt_idmap *idmap, const struct path *path, 467 struct kstat *stat, unsigned int request_mask, 468 unsigned int query_flags); 469 int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 470 long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 471 long exfat_compat_ioctl(struct file *filp, unsigned int cmd, 472 unsigned long arg); 473 int exfat_force_shutdown(struct super_block *sb, u32 flags); 474 475 /* namei.c */ 476 extern const struct dentry_operations exfat_dentry_ops; 477 extern const struct dentry_operations exfat_utf8_dentry_ops; 478 479 /* cache.c */ 480 int exfat_cache_init(void); 481 void exfat_cache_shutdown(void); 482 void exfat_cache_inval_inode(struct inode *inode); 483 int exfat_get_cluster(struct inode *inode, unsigned int cluster, 484 unsigned int *fclus, unsigned int *dclus, 485 unsigned int *last_dclus, int allow_eof); 486 487 /* dir.c */ 488 extern const struct inode_operations exfat_dir_inode_operations; 489 extern const struct file_operations exfat_dir_operations; 490 unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); 491 void exfat_init_dir_entry(struct exfat_entry_set_cache *es, 492 unsigned int type, unsigned int start_clu, 493 unsigned long long size, struct timespec64 *ts); 494 void exfat_init_ext_entry(struct exfat_entry_set_cache *es, int num_entries, 495 struct exfat_uni_name *p_uniname); 496 void exfat_remove_entries(struct inode *inode, struct exfat_entry_set_cache *es, 497 int order); 498 void exfat_update_dir_chksum(struct exfat_entry_set_cache *es); 499 int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); 500 int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, 501 struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, 502 struct exfat_hint *hint_opt); 503 int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); 504 struct exfat_dentry *exfat_get_dentry(struct super_block *sb, 505 struct exfat_chain *p_dir, int entry, struct buffer_head **bh); 506 struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, 507 int num); 508 int exfat_get_dentry_set(struct exfat_entry_set_cache *es, 509 struct super_block *sb, struct exfat_chain *p_dir, int entry, 510 unsigned int num_entries); 511 int exfat_get_empty_dentry_set(struct exfat_entry_set_cache *es, 512 struct super_block *sb, struct exfat_chain *p_dir, int entry, 513 unsigned int num_entries); 514 int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); 515 int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); 516 517 /* inode.c */ 518 extern const struct inode_operations exfat_file_inode_operations; 519 void exfat_sync_inode(struct inode *inode); 520 struct inode *exfat_build_inode(struct super_block *sb, 521 struct exfat_dir_entry *info, loff_t i_pos); 522 void exfat_hash_inode(struct inode *inode, loff_t i_pos); 523 void exfat_unhash_inode(struct inode *inode); 524 struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); 525 int __exfat_write_inode(struct inode *inode, int sync); 526 int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); 527 void exfat_evict_inode(struct inode *inode); 528 int exfat_block_truncate_page(struct inode *inode, loff_t from); 529 530 /* exfat/nls.c */ 531 unsigned short exfat_toupper(struct super_block *sb, unsigned short a); 532 int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, 533 unsigned short *b, unsigned int len); 534 int exfat_utf16_to_nls(struct super_block *sb, 535 struct exfat_uni_name *uniname, unsigned char *p_cstring, 536 int len); 537 int exfat_nls_to_utf16(struct super_block *sb, 538 const unsigned char *p_cstring, const int len, 539 struct exfat_uni_name *uniname, int *p_lossy); 540 int exfat_create_upcase_table(struct super_block *sb); 541 void exfat_free_upcase_table(struct exfat_sb_info *sbi); 542 543 /* exfat/misc.c */ 544 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) 545 __printf(3, 4) __cold; 546 #define exfat_fs_error(sb, fmt, args...) \ 547 __exfat_fs_error(sb, 1, fmt, ## args) 548 #define exfat_fs_error_ratelimit(sb, fmt, args...) \ 549 __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \ 550 fmt, ## args) 551 552 /* expand to pr_*() with prefix */ 553 #define exfat_err(sb, fmt, ...) \ 554 pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 555 #define exfat_warn(sb, fmt, ...) \ 556 pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 557 #define exfat_info(sb, fmt, ...) \ 558 pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 559 #define exfat_debug(sb, fmt, ...) \ 560 pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__) 561 562 void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 563 u8 tz, __le16 time, __le16 date, u8 time_cs); 564 void exfat_truncate_atime(struct timespec64 *ts); 565 void exfat_truncate_inode_atime(struct inode *inode); 566 void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, 567 u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); 568 u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); 569 u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); 570 void exfat_update_bh(struct buffer_head *bh, int sync); 571 int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); 572 void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, 573 unsigned int size, unsigned char flags); 574 void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); 575 576 #endif /* !_EXFAT_FS_H */ 577