/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. */ #ifndef _EXFAT_FS_H #define _EXFAT_FS_H #include <linux/fs.h> #include <linux/ratelimit.h> #include <linux/nls.h> #include <linux/blkdev.h> #define EXFAT_ROOT_INO … #define EXFAT_CLUSTERS_UNTRACKED … /* * exfat error flags */ enum exfat_error_mode { … }; /* * exfat nls lossy flag */ enum { … }; #define EXFAT_HASH_BITS … #define EXFAT_HASH_SIZE … /* * Type Definitions */ #define ES_2_ENTRIES … #define ES_ALL_ENTRIES … #define ES_IDX_FILE … #define ES_IDX_STREAM … #define ES_IDX_FIRST_FILENAME … #define EXFAT_FILENAME_ENTRY_NUM(name_len) … #define ES_IDX_LAST_FILENAME(name_len) … #define DIR_DELETED … /* type values */ #define TYPE_UNUSED … #define TYPE_DELETED … #define TYPE_INVALID … #define TYPE_CRITICAL_PRI … #define TYPE_BITMAP … #define TYPE_UPCASE … #define TYPE_VOLUME … #define TYPE_DIR … #define TYPE_FILE … #define TYPE_CRITICAL_SEC … #define TYPE_STREAM … #define TYPE_EXTEND … #define TYPE_ACL … #define TYPE_BENIGN_PRI … #define TYPE_GUID … #define TYPE_PADDING … #define TYPE_ACLTAB … #define TYPE_BENIGN_SEC … #define TYPE_VENDOR_EXT … #define TYPE_VENDOR_ALLOC … #define MAX_CHARSET_SIZE … #define MAX_NAME_LENGTH … #define MAX_VFSNAME_BUF_SIZE … #define EXFAT_HINT_NONE … #define EXFAT_MIN_SUBDIR … /* * helpers for cluster size to byte conversion. */ #define EXFAT_CLU_TO_B(b, sbi) … #define EXFAT_B_TO_CLU(b, sbi) … #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) … #define EXFAT_CLU_OFFSET(off, sbi) … /* * helpers for block size to byte conversion. */ #define EXFAT_BLK_TO_B(b, sb) … #define EXFAT_B_TO_BLK(b, sb) … #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) … #define EXFAT_BLK_OFFSET(off, sb) … /* * helpers for block size to dentry size conversion. */ #define EXFAT_B_TO_DEN(b) … #define EXFAT_DEN_TO_B(b) … /* * helpers for cluster size to dentry size conversion. */ #define EXFAT_CLU_TO_DEN(clu, sbi) … #define EXFAT_DEN_TO_CLU(dentry, sbi) … /* * helpers for fat entry. */ #define FAT_ENT_SIZE … #define FAT_ENT_SIZE_BITS … #define FAT_ENT_OFFSET_SECTOR(sb, loc) … #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) … /* * helpers for bitmap. */ #define CLUSTER_TO_BITMAP_ENT(clu) … #define BITMAP_ENT_TO_CLUSTER(ent) … #define BITS_PER_SECTOR(sb) … #define BITS_PER_SECTOR_MASK(sb) … #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) … #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) … #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) … #define IGNORED_BITS_REMAINED(clu, clu_base) … #define ES_ENTRY_NUM(name_len) … /* 19 entries = 1 file entry + 1 stream entry + 17 filename entries */ #define ES_MAX_ENTRY_NUM … /* * 19 entries x 32 bytes/entry = 608 bytes. * The 608 bytes are in 3 sectors at most (even 512 Byte sector). */ #define DIR_CACHE_SIZE … struct exfat_dentry_namebuf { … }; /* unicode name structure */ struct exfat_uni_name { … }; /* directory structure */ struct exfat_chain { … }; /* first empty entry hint information */ struct exfat_hint_femp { … }; /* hint structure */ struct exfat_hint { … }; struct exfat_entry_set_cache { … }; #define IS_DYNAMIC_ES(es) … struct exfat_dir_entry { … }; /* * exfat mount in-memory data */ struct exfat_mount_options { … }; /* * EXFAT file system superblock in-memory data */ struct exfat_sb_info { … }; #define EXFAT_CACHE_VALID … /* * EXFAT file system inode in-memory data */ struct exfat_inode_info { … }; static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb) { … } static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) { … } /* * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to * save ATTR_RO instead of ->i_mode. * * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only * bit, it's just used as flag for app. */ static inline int exfat_mode_can_hold_ro(struct inode *inode) { … } /* Convert attribute bits and a mask to the UNIX mode. */ static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, unsigned short attr, mode_t mode) { … } /* Return the FAT attribute byte for this inode */ static inline unsigned short exfat_make_attr(struct inode *inode) { … } static inline void exfat_save_attr(struct inode *inode, unsigned short attr) { … } static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi, sector_t sec) { … } static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, unsigned int clus) { … } static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, sector_t sec) { … } static inline bool is_valid_cluster(struct exfat_sb_info *sbi, unsigned int clus) { … } /* super.c */ int exfat_set_volume_dirty(struct super_block *sb); int exfat_clear_volume_dirty(struct super_block *sb); /* fatent.c */ #define exfat_get_next_cluster(sb, pclu) … int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc, struct exfat_chain *p_chain, bool sync_bmap); int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain); int exfat_ent_get(struct super_block *sb, unsigned int loc, unsigned int *content); int exfat_ent_set(struct super_block *sb, unsigned int loc, unsigned int content); int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain, unsigned int len); int exfat_zeroed_cluster(struct inode *dir, unsigned int clu); int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain, unsigned int *ret_clu); int exfat_count_num_clusters(struct super_block *sb, struct exfat_chain *p_chain, unsigned int *ret_count); /* balloc.c */ int exfat_load_bitmap(struct super_block *sb); void exfat_free_bitmap(struct exfat_sb_info *sbi); int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync); void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync); unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu); int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count); int exfat_trim_fs(struct inode *inode, struct fstrim_range *range); /* file.c */ extern const struct file_operations exfat_file_operations; int __exfat_truncate(struct inode *inode); void exfat_truncate(struct inode *inode); int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry, struct iattr *attr); int exfat_getattr(struct mnt_idmap *idmap, const struct path *path, struct kstat *stat, unsigned int request_mask, unsigned int query_flags); int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); long exfat_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); /* namei.c */ extern const struct dentry_operations exfat_dentry_ops; extern const struct dentry_operations exfat_utf8_dentry_ops; /* cache.c */ int exfat_cache_init(void); void exfat_cache_shutdown(void); void exfat_cache_inval_inode(struct inode *inode); int exfat_get_cluster(struct inode *inode, unsigned int cluster, unsigned int *fclus, unsigned int *dclus, unsigned int *last_dclus, int allow_eof); /* dir.c */ extern const struct inode_operations exfat_dir_inode_operations; extern const struct file_operations exfat_dir_operations; unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry); void exfat_init_dir_entry(struct exfat_entry_set_cache *es, unsigned int type, unsigned int start_clu, unsigned long long size, struct timespec64 *ts); void exfat_init_ext_entry(struct exfat_entry_set_cache *es, int num_entries, struct exfat_uni_name *p_uniname); void exfat_remove_entries(struct inode *inode, struct exfat_entry_set_cache *es, int order); void exfat_update_dir_chksum(struct exfat_entry_set_cache *es); int exfat_calc_num_entries(struct exfat_uni_name *p_uniname); int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei, struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, struct exfat_hint *hint_opt); int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu); struct exfat_dentry *exfat_get_dentry(struct super_block *sb, struct exfat_chain *p_dir, int entry, struct buffer_head **bh); struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es, int num); int exfat_get_dentry_set(struct exfat_entry_set_cache *es, struct super_block *sb, struct exfat_chain *p_dir, int entry, unsigned int num_entries); int exfat_get_empty_dentry_set(struct exfat_entry_set_cache *es, struct super_block *sb, struct exfat_chain *p_dir, int entry, unsigned int num_entries); int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync); int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir); /* inode.c */ extern const struct inode_operations exfat_file_inode_operations; void exfat_sync_inode(struct inode *inode); struct inode *exfat_build_inode(struct super_block *sb, struct exfat_dir_entry *info, loff_t i_pos); void exfat_hash_inode(struct inode *inode, loff_t i_pos); void exfat_unhash_inode(struct inode *inode); struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); int __exfat_write_inode(struct inode *inode, int sync); int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); void exfat_evict_inode(struct inode *inode); int exfat_block_truncate_page(struct inode *inode, loff_t from); /* exfat/nls.c */ unsigned short exfat_toupper(struct super_block *sb, unsigned short a); int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, unsigned short *b, unsigned int len); int exfat_utf16_to_nls(struct super_block *sb, struct exfat_uni_name *uniname, unsigned char *p_cstring, int len); int exfat_nls_to_utf16(struct super_block *sb, const unsigned char *p_cstring, const int len, struct exfat_uni_name *uniname, int *p_lossy); int exfat_create_upcase_table(struct super_block *sb); void exfat_free_upcase_table(struct exfat_sb_info *sbi); /* exfat/misc.c */ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...) __printf(3, 4) __cold; #define exfat_fs_error(sb, fmt, args...) … #define exfat_fs_error_ratelimit(sb, fmt, args...) … /* expand to pr_*() with prefix */ #define exfat_err(sb, fmt, ...) … #define exfat_warn(sb, fmt, ...) … #define exfat_info(sb, fmt, ...) … #define exfat_debug(sb, fmt, ...) … void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, u8 tz, __le16 time, __le16 date, u8 time_cs); void exfat_truncate_atime(struct timespec64 *ts); void exfat_truncate_inode_atime(struct inode *inode); void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, u8 *tz, __le16 *time, __le16 *date, u8 *time_cs); u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type); u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type); void exfat_update_bh(struct buffer_head *bh, int sync); int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync); void exfat_chain_set(struct exfat_chain *ec, unsigned int dir, unsigned int size, unsigned char flags); void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec); #endif /* !_EXFAT_FS_H */
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