| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Valdis Kletnieks | 4657 | 99.91% | 2 | 50.00% |
| Valentin Vidic | 4 | 0.09% | 2 | 50.00% |
| Total | 4661 | 4 |
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. */ #ifndef _EXFAT_H #define _EXFAT_H #include <linux/types.h> #include <linux/buffer_head.h> #ifdef CONFIG_EXFAT_KERNEL_DEBUG /* For Debugging Purpose */ /* IOCTL code 'f' used by * - file systems typically #0~0x1F * - embedded terminal devices #128~ * - exts for debugging purpose #99 * number 100 and 101 is available now but has possible conflicts */ #define EXFAT_IOC_GET_DEBUGFLAGS _IOR('f', 100, long) #define EXFAT_IOC_SET_DEBUGFLAGS _IOW('f', 101, long) #define EXFAT_DEBUGFLAGS_INVALID_UMOUNT 0x01 #define EXFAT_DEBUGFLAGS_ERROR_RW 0x02 #endif /* CONFIG_EXFAT_KERNEL_DEBUG */ #ifdef CONFIG_EXFAT_DEBUG_MSG #define DEBUG 1 #else #undef DEBUG #endif #define DENTRY_SIZE 32 /* dir entry size */ #define DENTRY_SIZE_BITS 5 /* PBR entries */ #define PBR_SIGNATURE 0xAA55 #define EXT_SIGNATURE 0xAA550000 #define VOL_LABEL "NO NAME " /* size should be 11 */ #define OEM_NAME "MSWIN4.1" /* size should be 8 */ #define STR_FAT12 "FAT12 " /* size should be 8 */ #define STR_FAT16 "FAT16 " /* size should be 8 */ #define STR_FAT32 "FAT32 " /* size should be 8 */ #define STR_EXFAT "EXFAT " /* size should be 8 */ #define VOL_CLEAN 0x0000 #define VOL_DIRTY 0x0002 /* max number of clusters */ #define FAT12_THRESHOLD 4087 /* 2^12 - 1 + 2 (clu 0 & 1) */ #define FAT16_THRESHOLD 65527 /* 2^16 - 1 + 2 */ #define FAT32_THRESHOLD 268435457 /* 2^28 - 1 + 2 */ #define EXFAT_THRESHOLD 268435457 /* 2^28 - 1 + 2 */ /* file types */ #define TYPE_UNUSED 0x0000 #define TYPE_DELETED 0x0001 #define TYPE_INVALID 0x0002 #define TYPE_CRITICAL_PRI 0x0100 #define TYPE_BITMAP 0x0101 #define TYPE_UPCASE 0x0102 #define TYPE_VOLUME 0x0103 #define TYPE_DIR 0x0104 #define TYPE_FILE 0x011F #define TYPE_SYMLINK 0x015F #define TYPE_CRITICAL_SEC 0x0200 #define TYPE_STREAM 0x0201 #define TYPE_EXTEND 0x0202 #define TYPE_ACL 0x0203 #define TYPE_BENIGN_PRI 0x0400 #define TYPE_GUID 0x0401 #define TYPE_PADDING 0x0402 #define TYPE_ACLTAB 0x0403 #define TYPE_BENIGN_SEC 0x0800 #define TYPE_ALL 0x0FFF /* time modes */ #define TM_CREATE 0 #define TM_MODIFY 1 #define TM_ACCESS 2 /* checksum types */ #define CS_DIR_ENTRY 0 #define CS_PBR_SECTOR 1 #define CS_DEFAULT 2 #define CLUSTER_16(x) ((u16)(x)) #define CLUSTER_32(x) ((u32)(x)) #define START_SECTOR(x) \ ((((sector_t)((x) - 2)) << p_fs->sectors_per_clu_bits) + \ p_fs->data_start_sector) #define IS_LAST_SECTOR_IN_CLUSTER(sec) \ ((((sec) - p_fs->data_start_sector + 1) & \ ((1 << p_fs->sectors_per_clu_bits) - 1)) == 0) #define GET_CLUSTER_FROM_SECTOR(sec) \ ((u32)((((sec) - p_fs->data_start_sector) >> \ p_fs->sectors_per_clu_bits) + 2)) #define GET16(p_src) \ (((u16)(p_src)[0]) | (((u16)(p_src)[1]) << 8)) #define GET32(p_src) \ (((u32)(p_src)[0]) | (((u32)(p_src)[1]) << 8) | \ (((u32)(p_src)[2]) << 16) | (((u32)(p_src)[3]) << 24)) #define GET64(p_src) \ (((u64)(p_src)[0]) | (((u64)(p_src)[1]) << 8) | \ (((u64)(p_src)[2]) << 16) | (((u64)(p_src)[3]) << 24) | \ (((u64)(p_src)[4]) << 32) | (((u64)(p_src)[5]) << 40) | \ (((u64)(p_src)[6]) << 48) | (((u64)(p_src)[7]) << 56)) #define SET16(p_dst, src) \ do { \ (p_dst)[0] = (u8)(src); \ (p_dst)[1] = (u8)(((u16)(src)) >> 8); \ } while (0) #define SET32(p_dst, src) \ do { \ (p_dst)[0] = (u8)(src); \ (p_dst)[1] = (u8)(((u32)(src)) >> 8); \ (p_dst)[2] = (u8)(((u32)(src)) >> 16); \ (p_dst)[3] = (u8)(((u32)(src)) >> 24); \ } while (0) #define SET64(p_dst, src) \ do { \ (p_dst)[0] = (u8)(src); \ (p_dst)[1] = (u8)(((u64)(src)) >> 8); \ (p_dst)[2] = (u8)(((u64)(src)) >> 16); \ (p_dst)[3] = (u8)(((u64)(src)) >> 24); \ (p_dst)[4] = (u8)(((u64)(src)) >> 32); \ (p_dst)[5] = (u8)(((u64)(src)) >> 40); \ (p_dst)[6] = (u8)(((u64)(src)) >> 48); \ (p_dst)[7] = (u8)(((u64)(src)) >> 56); \ } while (0) #ifdef __LITTLE_ENDIAN #define GET16_A(p_src) (*((u16 *)(p_src))) #define GET32_A(p_src) (*((u32 *)(p_src))) #define GET64_A(p_src) (*((u64 *)(p_src))) #define SET16_A(p_dst, src) (*((u16 *)(p_dst)) = (u16)(src)) #define SET32_A(p_dst, src) (*((u32 *)(p_dst)) = (u32)(src)) #define SET64_A(p_dst, src) (*((u64 *)(p_dst)) = (u64)(src)) #else /* BIG_ENDIAN */ #define GET16_A(p_src) GET16(p_src) #define GET32_A(p_src) GET32(p_src) #define GET64_A(p_src) GET64(p_src) #define SET16_A(p_dst, src) SET16(p_dst, src) #define SET32_A(p_dst, src) SET32(p_dst, src) #define SET64_A(p_dst, src) SET64(p_dst, src) #endif /* cache size (in number of sectors) */ /* (should be an exponential value of 2) */ #define FAT_CACHE_SIZE 128 #define FAT_CACHE_HASH_SIZE 64 #define BUF_CACHE_SIZE 256 #define BUF_CACHE_HASH_SIZE 64 /* Upcase table macro */ #define HIGH_INDEX_BIT (8) #define HIGH_INDEX_MASK (0xFF00) #define LOW_INDEX_BIT (16 - HIGH_INDEX_BIT) #define UTBL_ROW_COUNT BIT(LOW_INDEX_BIT) #define UTBL_COL_COUNT BIT(HIGH_INDEX_BIT) static inline u16 get_col_index(u16 i) { return i >> LOW_INDEX_BIT; } static inline u16 get_row_index(u16 i) { return i & ~HIGH_INDEX_MASK; } #define EXFAT_SUPER_MAGIC (0x2011BAB0L) #define EXFAT_ROOT_INO 1 /* FAT types */ #define FAT12 0x01 /* FAT12 */ #define FAT16 0x0E /* Win95 FAT16 (LBA) */ #define FAT32 0x0C /* Win95 FAT32 (LBA) */ #define EXFAT 0x07 /* exFAT */ /* file name lengths */ #define MAX_CHARSET_SIZE 3 /* max size of multi-byte character */ #define MAX_PATH_DEPTH 15 /* max depth of path name */ #define MAX_NAME_LENGTH 256 /* max len of filename including NULL */ #define MAX_PATH_LENGTH 260 /* max len of pathname including NULL */ #define DOS_NAME_LENGTH 11 /* DOS filename length excluding NULL */ #define DOS_PATH_LENGTH 80 /* DOS pathname length excluding NULL */ /* file attributes */ #define ATTR_NORMAL 0x0000 #define ATTR_READONLY 0x0001 #define ATTR_HIDDEN 0x0002 #define ATTR_SYSTEM 0x0004 #define ATTR_VOLUME 0x0008 #define ATTR_SUBDIR 0x0010 #define ATTR_ARCHIVE 0x0020 #define ATTR_SYMLINK 0x0040 #define ATTR_EXTEND 0x000F #define ATTR_RWMASK 0x007E /* file creation modes */ #define FM_REGULAR 0x00 #define FM_SYMLINK 0x40 /* return values */ #define FFS_SUCCESS 0 #define FFS_MEDIAERR 1 #define FFS_FORMATERR 2 #define FFS_MOUNTED 3 #define FFS_NOTMOUNTED 4 #define FFS_ALIGNMENTERR 5 #define FFS_SEMAPHOREERR 6 #define FFS_INVALIDPATH 7 #define FFS_INVALIDFID 8 #define FFS_NOTFOUND 9 #define FFS_FILEEXIST 10 #define FFS_PERMISSIONERR 11 #define FFS_NOTOPENED 12 #define FFS_MAXOPENED 13 #define FFS_FULL 14 #define FFS_EOF 15 #define FFS_DIRBUSY 16 #define FFS_MEMORYERR 17 #define FFS_NAMETOOLONG 18 #define FFS_ERROR 19 #define NUM_UPCASE 2918 #define DOS_CUR_DIR_NAME ". " #define DOS_PAR_DIR_NAME ".. " #ifdef __LITTLE_ENDIAN #define UNI_CUR_DIR_NAME ".\0" #define UNI_PAR_DIR_NAME ".\0.\0" #else #define UNI_CUR_DIR_NAME "\0." #define UNI_PAR_DIR_NAME "\0.\0." #endif struct date_time_t { u16 Year; u16 Month; u16 Day; u16 Hour; u16 Minute; u16 Second; u16 MilliSecond; }; struct part_info_t { u32 Offset; /* start sector number of the partition */ u32 Size; /* in sectors */ }; struct dev_info_t { u32 SecSize; /* sector size in bytes */ u32 DevSize; /* block device size in sectors */ }; struct vol_info_t { u32 FatType; u32 ClusterSize; u32 NumClusters; u32 FreeClusters; u32 UsedClusters; }; /* directory structure */ struct chain_t { u32 dir; s32 size; u8 flags; }; struct file_id_t { struct chain_t dir; s32 entry; u32 type; u32 attr; u32 start_clu; u64 size; u8 flags; s64 rwoffset; s32 hint_last_off; u32 hint_last_clu; }; struct dir_entry_t { char Name[MAX_NAME_LENGTH * MAX_CHARSET_SIZE]; /* used only for FAT12/16/32, not used for exFAT */ char ShortName[DOS_NAME_LENGTH + 2]; u32 Attr; u64 Size; u32 NumSubdirs; struct date_time_t CreateTimestamp; struct date_time_t ModifyTimestamp; struct date_time_t AccessTimestamp; }; struct timestamp_t { u16 sec; /* 0 ~ 59 */ u16 min; /* 0 ~ 59 */ u16 hour; /* 0 ~ 23 */ u16 day; /* 1 ~ 31 */ u16 mon; /* 1 ~ 12 */ u16 year; /* 0 ~ 127 (since 1980) */ }; /* MS_DOS FAT partition boot record (512 bytes) */ struct pbr_sector_t { u8 jmp_boot[3]; u8 oem_name[8]; u8 bpb[109]; u8 boot_code[390]; u8 signature[2]; }; /* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */ struct bpb16_t { u8 sector_size[2]; u8 sectors_per_clu; u8 num_reserved[2]; u8 num_fats; u8 num_root_entries[2]; u8 num_sectors[2]; u8 media_type; u8 num_fat_sectors[2]; u8 sectors_in_track[2]; u8 num_heads[2]; u8 num_hid_sectors[4]; u8 num_huge_sectors[4]; u8 phy_drv_no; u8 reserved; u8 ext_signature; u8 vol_serial[4]; u8 vol_label[11]; u8 vol_type[8]; }; /* MS-DOS FAT32 BIOS parameter block (79 bytes) */ struct bpb32_t { u8 sector_size[2]; u8 sectors_per_clu; u8 num_reserved[2]; u8 num_fats; u8 num_root_entries[2]; u8 num_sectors[2]; u8 media_type; u8 num_fat_sectors[2]; u8 sectors_in_track[2]; u8 num_heads[2]; u8 num_hid_sectors[4]; u8 num_huge_sectors[4]; u8 num_fat32_sectors[4]; u8 ext_flags[2]; u8 fs_version[2]; u8 root_cluster[4]; u8 fsinfo_sector[2]; u8 backup_sector[2]; u8 reserved[12]; u8 phy_drv_no; u8 ext_reserved; u8 ext_signature; u8 vol_serial[4]; u8 vol_label[11]; u8 vol_type[8]; }; /* MS-DOS EXFAT BIOS parameter block (109 bytes) */ struct bpbex_t { u8 reserved1[53]; u8 vol_offset[8]; u8 vol_length[8]; u8 fat_offset[4]; u8 fat_length[4]; u8 clu_offset[4]; u8 clu_count[4]; u8 root_cluster[4]; u8 vol_serial[4]; u8 fs_version[2]; u8 vol_flags[2]; u8 sector_size_bits; u8 sectors_per_clu_bits; u8 num_fats; u8 phy_drv_no; u8 perc_in_use; u8 reserved2[7]; }; /* MS-DOS FAT file system information sector (512 bytes) */ struct fsi_sector_t { u8 signature1[4]; u8 reserved1[480]; u8 signature2[4]; u8 free_cluster[4]; u8 next_cluster[4]; u8 reserved2[14]; u8 signature3[2]; }; /* MS-DOS FAT directory entry (32 bytes) */ struct dentry_t { u8 dummy[32]; }; struct dos_dentry_t { u8 name[DOS_NAME_LENGTH]; u8 attr; u8 lcase; u8 create_time_ms; u8 create_time[2]; u8 create_date[2]; u8 access_date[2]; u8 start_clu_hi[2]; u8 modify_time[2]; u8 modify_date[2]; u8 start_clu_lo[2]; u8 size[4]; }; /* MS-DOS FAT extended directory entry (32 bytes) */ struct ext_dentry_t { u8 order; u8 unicode_0_4[10]; u8 attr; u8 sysid; u8 checksum; u8 unicode_5_10[12]; u8 start_clu[2]; u8 unicode_11_12[4]; }; /* MS-DOS EXFAT file directory entry (32 bytes) */ struct file_dentry_t { u8 type; u8 num_ext; u8 checksum[2]; u8 attr[2]; u8 reserved1[2]; u8 create_time[2]; u8 create_date[2]; u8 modify_time[2]; u8 modify_date[2]; u8 access_time[2]; u8 access_date[2]; u8 create_time_ms; u8 modify_time_ms; u8 access_time_ms; u8 reserved2[9]; }; /* MS-DOS EXFAT stream extension directory entry (32 bytes) */ struct strm_dentry_t { u8 type; u8 flags; u8 reserved1; u8 name_len; u8 name_hash[2]; u8 reserved2[2]; u8 valid_size[8]; u8 reserved3[4]; u8 start_clu[4]; u8 size[8]; }; /* MS-DOS EXFAT file name directory entry (32 bytes) */ struct name_dentry_t { u8 type; u8 flags; u8 unicode_0_14[30]; }; /* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */ struct bmap_dentry_t { u8 type; u8 flags; u8 reserved[18]; u8 start_clu[4]; u8 size[8]; }; /* MS-DOS EXFAT up-case table directory entry (32 bytes) */ struct case_dentry_t { u8 type; u8 reserved1[3]; u8 checksum[4]; u8 reserved2[12]; u8 start_clu[4]; u8 size[8]; }; /* MS-DOS EXFAT volume label directory entry (32 bytes) */ struct volm_dentry_t { u8 type; u8 label_len; u8 unicode_0_10[22]; u8 reserved[8]; }; /* unused entry hint information */ struct uentry_t { u32 dir; s32 entry; struct chain_t clu; }; /* DOS name structure */ struct dos_name_t { u8 name[DOS_NAME_LENGTH]; u8 name_case; }; /* unicode name structure */ struct uni_name_t { u16 name[MAX_NAME_LENGTH]; u16 name_hash; u8 name_len; }; struct buf_cache_t { struct buf_cache_t *next; struct buf_cache_t *prev; struct buf_cache_t *hash_next; struct buf_cache_t *hash_prev; s32 drv; sector_t sec; u32 flag; struct buffer_head *buf_bh; }; struct fs_func { s32 (*alloc_cluster)(struct super_block *sb, s32 num_alloc, struct chain_t *p_chain); void (*free_cluster)(struct super_block *sb, struct chain_t *p_chain, s32 do_relse); s32 (*count_used_clusters)(struct super_block *sb); s32 (*init_dir_entry)(struct super_block *sb, struct chain_t *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 (*init_ext_entry)(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 num_entries, struct uni_name_t *p_uniname, struct dos_name_t *p_dosname); s32 (*find_dir_entry)(struct super_block *sb, struct chain_t *p_dir, struct uni_name_t *p_uniname, s32 num_entries, struct dos_name_t *p_dosname, u32 type); void (*delete_dir_entry)(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 offset, s32 num_entries); void (*get_uni_name_from_ext_entry)(struct super_block *sb, struct chain_t *p_dir, s32 entry, u16 *uniname); s32 (*count_ext_entries)(struct super_block *sb, struct chain_t *p_dir, s32 entry, struct dentry_t *p_entry); s32 (*calc_num_entries)(struct uni_name_t *p_uniname); u32 (*get_entry_type)(struct dentry_t *p_entry); void (*set_entry_type)(struct dentry_t *p_entry, u32 type); u32 (*get_entry_attr)(struct dentry_t *p_entry); void (*set_entry_attr)(struct dentry_t *p_entry, u32 attr); u8 (*get_entry_flag)(struct dentry_t *p_entry); void (*set_entry_flag)(struct dentry_t *p_entry, u8 flag); u32 (*get_entry_clu0)(struct dentry_t *p_entry); void (*set_entry_clu0)(struct dentry_t *p_entry, u32 clu0); u64 (*get_entry_size)(struct dentry_t *p_entry); void (*set_entry_size)(struct dentry_t *p_entry, u64 size); void (*get_entry_time)(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); void (*set_entry_time)(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); }; struct fs_info_t { u32 drv; /* drive ID */ u32 vol_type; /* volume FAT type */ u32 vol_id; /* volume serial number */ u64 num_sectors; /* num of sectors in volume */ u32 num_clusters; /* num of clusters in volume */ u32 cluster_size; /* cluster size in bytes */ u32 cluster_size_bits; u32 sectors_per_clu; /* cluster size in sectors */ u32 sectors_per_clu_bits; u32 PBR_sector; /* PBR sector */ u32 FAT1_start_sector; /* FAT1 start sector */ u32 FAT2_start_sector; /* FAT2 start sector */ u32 root_start_sector; /* root dir start sector */ u32 data_start_sector; /* data area start sector */ u32 num_FAT_sectors; /* num of FAT sectors */ u32 root_dir; /* root dir cluster */ u32 dentries_in_root; /* num of dentries in root dir */ u32 dentries_per_clu; /* num of dentries per cluster */ u32 vol_flag; /* volume dirty flag */ struct buffer_head *pbr_bh; /* PBR sector */ u32 map_clu; /* allocation bitmap start cluster */ u32 map_sectors; /* num of allocation bitmap sectors */ struct buffer_head **vol_amap; /* allocation bitmap */ u16 **vol_utbl; /* upcase table */ u32 clu_srch_ptr; /* cluster search pointer */ u32 used_clusters; /* number of used clusters */ struct uentry_t hint_uentry; /* unused entry hint information */ u32 dev_ejected; /* block device operation error flag */ struct fs_func *fs_func; struct semaphore v_sem; /* FAT cache */ struct buf_cache_t FAT_cache_array[FAT_CACHE_SIZE]; struct buf_cache_t FAT_cache_lru_list; struct buf_cache_t FAT_cache_hash_list[FAT_CACHE_HASH_SIZE]; /* buf cache */ struct buf_cache_t buf_cache_array[BUF_CACHE_SIZE]; struct buf_cache_t buf_cache_lru_list; struct buf_cache_t buf_cache_hash_list[BUF_CACHE_HASH_SIZE]; }; #define ES_2_ENTRIES 2 #define ES_3_ENTRIES 3 #define ES_ALL_ENTRIES 0 struct entry_set_cache_t { /* sector number that contains file_entry */ sector_t sector; /* byte offset in the sector */ s32 offset; /* * flag in stream entry. * 01 for cluster chain, * 03 for contig. clusteres. */ s32 alloc_flag; u32 num_entries; /* __buf should be the last member */ void *__buf; }; #define EXFAT_ERRORS_CONT 1 /* ignore error and continue */ #define EXFAT_ERRORS_PANIC 2 /* panic on error */ #define EXFAT_ERRORS_RO 3 /* remount r/o on error */ /* ioctl command */ #define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32) struct exfat_mount_options { kuid_t fs_uid; kgid_t fs_gid; unsigned short fs_fmask; unsigned short fs_dmask; /* permission for setting the [am]time */ unsigned short allow_utime; /* codepage for shortname conversions */ unsigned short codepage; /* charset for filename input/display */ char *iocharset; unsigned char casesensitive; /* on error: continue, panic, remount-ro */ unsigned char errors; #ifdef CONFIG_EXFAT_DISCARD /* flag on if -o dicard specified and device support discard() */ unsigned char discard; #endif /* CONFIG_EXFAT_DISCARD */ }; #define EXFAT_HASH_BITS 8 #define EXFAT_HASH_SIZE BIT(EXFAT_HASH_BITS) /* * EXFAT file system in-core superblock data */ struct bd_info_t { s32 sector_size; /* in bytes */ s32 sector_size_bits; s32 sector_size_mask; /* total number of sectors in this block device */ s32 num_sectors; /* opened or not */ bool opened; }; struct exfat_sb_info { struct fs_info_t fs_info; struct bd_info_t bd_info; struct exfat_mount_options options; int s_dirt; struct mutex s_lock; struct nls_table *nls_disk; /* Codepage used on disk */ struct nls_table *nls_io; /* Charset used for input and display */ struct inode *fat_inode; spinlock_t inode_hash_lock; struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; #ifdef CONFIG_EXFAT_KERNEL_DEBUG long debug_flags; #endif /* CONFIG_EXFAT_KERNEL_DEBUG */ }; /* * EXFAT file system inode data in memory */ struct exfat_inode_info { struct file_id_t fid; char *target; /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */ loff_t mmu_private; /* physically allocated size */ loff_t i_pos; /* on-disk position of directory entry or 0 */ struct hlist_node i_hash_fat; /* hash by i_location */ struct rw_semaphore truncate_lock; struct inode vfs_inode; struct rw_semaphore i_alloc_sem; /* protect bmap against truncate */ }; #define EXFAT_SB(sb) ((struct exfat_sb_info *)((sb)->s_fs_info)) static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) { return container_of(inode, struct exfat_inode_info, vfs_inode); } /* NLS management function */ u16 nls_upper(struct super_block *sb, u16 a); int nls_dosname_cmp(struct super_block *sb, u8 *a, u8 *b); int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b); void nls_uniname_to_dosname(struct super_block *sb, struct dos_name_t *p_dosname, struct uni_name_t *p_uniname, bool *p_lossy); void nls_dosname_to_uniname(struct super_block *sb, struct uni_name_t *p_uniname, struct dos_name_t *p_dosname); void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring, struct uni_name_t *p_uniname); void nls_cstring_to_uniname(struct super_block *sb, struct uni_name_t *p_uniname, u8 *p_cstring, bool *p_lossy); /* buffer cache management */ void buf_init(struct super_block *sb); void buf_shutdown(struct super_block *sb); int FAT_read(struct super_block *sb, u32 loc, u32 *content); s32 FAT_write(struct super_block *sb, u32 loc, u32 content); u8 *FAT_getblk(struct super_block *sb, sector_t sec); void FAT_modify(struct super_block *sb, sector_t sec); void FAT_release_all(struct super_block *sb); void FAT_sync(struct super_block *sb); u8 *buf_getblk(struct super_block *sb, sector_t sec); void buf_modify(struct super_block *sb, sector_t sec); void buf_lock(struct super_block *sb, sector_t sec); void buf_unlock(struct super_block *sb, sector_t sec); void buf_release(struct super_block *sb, sector_t sec); void buf_release_all(struct super_block *sb); void buf_sync(struct super_block *sb); /* fs management functions */ void fs_set_vol_flags(struct super_block *sb, u32 new_flag); void fs_error(struct super_block *sb); /* cluster management functions */ s32 clear_cluster(struct super_block *sb, u32 clu); s32 fat_alloc_cluster(struct super_block *sb, s32 num_alloc, struct chain_t *p_chain); s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc, struct chain_t *p_chain); void fat_free_cluster(struct super_block *sb, struct chain_t *p_chain, s32 do_relse); void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain, s32 do_relse); u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain); s32 count_num_clusters(struct super_block *sb, struct chain_t *dir); s32 fat_count_used_clusters(struct super_block *sb); s32 exfat_count_used_clusters(struct super_block *sb); void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len); /* allocation bitmap management functions */ s32 load_alloc_bitmap(struct super_block *sb); void free_alloc_bitmap(struct super_block *sb); s32 set_alloc_bitmap(struct super_block *sb, u32 clu); s32 clr_alloc_bitmap(struct super_block *sb, u32 clu); u32 test_alloc_bitmap(struct super_block *sb, u32 clu); void sync_alloc_bitmap(struct super_block *sb); /* upcase table management functions */ s32 load_upcase_table(struct super_block *sb); void free_upcase_table(struct super_block *sb); /* dir entry management functions */ u32 fat_get_entry_type(struct dentry_t *p_entry); u32 exfat_get_entry_type(struct dentry_t *p_entry); void fat_set_entry_type(struct dentry_t *p_entry, u32 type); void exfat_set_entry_type(struct dentry_t *p_entry, u32 type); u32 fat_get_entry_attr(struct dentry_t *p_entry); u32 exfat_get_entry_attr(struct dentry_t *p_entry); void fat_set_entry_attr(struct dentry_t *p_entry, u32 attr); void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr); u8 fat_get_entry_flag(struct dentry_t *p_entry); u8 exfat_get_entry_flag(struct dentry_t *p_entry); void fat_set_entry_flag(struct dentry_t *p_entry, u8 flag); void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flag); u32 fat_get_entry_clu0(struct dentry_t *p_entry); u32 exfat_get_entry_clu0(struct dentry_t *p_entry); void fat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu); void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu); u64 fat_get_entry_size(struct dentry_t *p_entry); u64 exfat_get_entry_size(struct dentry_t *p_entry); void fat_set_entry_size(struct dentry_t *p_entry, u64 size); void exfat_set_entry_size(struct dentry_t *p_entry, u64 size); struct timestamp_t *tm_current(struct timestamp_t *tm); void fat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); void fat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp, u8 mode); s32 fat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 fat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 num_entries, struct uni_name_t *p_uniname, struct dos_name_t *p_dosname); s32 exfat_init_ext_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 num_entries, struct uni_name_t *p_uniname, struct dos_name_t *p_dosname); void init_dos_entry(struct dos_dentry_t *ep, u32 type, u32 start_clu); void init_ext_entry(struct ext_dentry_t *ep, s32 order, u8 chksum, u16 *uniname); void init_file_entry(struct file_dentry_t *ep, u32 type); void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu, u64 size); void init_name_entry(struct name_dentry_t *ep, u16 *uniname); void fat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 order, s32 num_entries); void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, s32 order, s32 num_entries); s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry, sector_t *sector, s32 *offset); struct dentry_t *get_entry_with_sector(struct super_block *sb, sector_t sector, s32 offset); struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir, s32 entry, sector_t *sector); struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb, struct chain_t *p_dir, s32 entry, u32 type, struct dentry_t **file_ep); void release_entry_set(struct entry_set_cache_t *es); s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_t *es); s32 write_partial_entries_in_entry_set(struct super_block *sb, struct entry_set_cache_t *es, struct dentry_t *ep, u32 count); s32 search_deleted_or_unused_entry(struct super_block *sb, struct chain_t *p_dir, s32 num_entries); s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_entries); s32 fat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir, struct uni_name_t *p_uniname, s32 num_entries, struct dos_name_t *p_dosname, u32 type); s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir, struct uni_name_t *p_uniname, s32 num_entries, struct dos_name_t *p_dosname, u32 type); s32 fat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir, s32 entry, struct dentry_t *p_entry); s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir, s32 entry, struct dentry_t *p_entry); s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir, u32 type); void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir, s32 entry); void update_dir_checksum_with_entry_set(struct super_block *sb, struct entry_set_cache_t *es); bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir); /* name conversion functions */ s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir, struct uni_name_t *p_uniname, s32 *entries, struct dos_name_t *p_dosname); void get_uni_name_from_dos_entry(struct super_block *sb, struct dos_dentry_t *ep, struct uni_name_t *p_uniname, u8 mode); void fat_get_uni_name_from_ext_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, u16 *uniname); void exfat_get_uni_name_from_ext_entry(struct super_block *sb, struct chain_t *p_dir, s32 entry, u16 *uniname); s32 extract_uni_name_from_ext_entry(struct ext_dentry_t *ep, u16 *uniname, s32 order); s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname, s32 order); s32 fat_generate_dos_name(struct super_block *sb, struct chain_t *p_dir, struct dos_name_t *p_dosname); void fat_attach_count_to_dos_name(u8 *dosname, s32 count); s32 fat_calc_num_entries(struct uni_name_t *p_uniname); s32 exfat_calc_num_entries(struct uni_name_t *p_uniname); u8 calc_checksum_1byte(void *data, s32 len, u8 chksum); u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type); u32 calc_checksum_4byte(void *data, s32 len, u32 chksum, s32 type); /* name resolution functions */ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir, struct uni_name_t *p_uniname); s32 resolve_name(u8 *name, u8 **arg); /* file operation functions */ s32 fat16_mount(struct super_block *sb, struct pbr_sector_t *p_pbr); s32 fat32_mount(struct super_block *sb, struct pbr_sector_t *p_pbr); s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr); s32 create_dir(struct inode *inode, struct chain_t *p_dir, struct uni_name_t *p_uniname, struct file_id_t *fid); s32 create_file(struct inode *inode, struct chain_t *p_dir, struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid); void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry); s32 rename_file(struct inode *inode, struct chain_t *p_dir, s32 old_entry, struct uni_name_t *p_uniname, struct file_id_t *fid); s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry, struct chain_t *p_newdir, struct uni_name_t *p_uniname, struct file_id_t *fid); /* sector read/write functions */ int sector_read(struct super_block *sb, sector_t sec, struct buffer_head **bh, bool read); int sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh, bool sync); int multi_sector_read(struct super_block *sb, sector_t sec, struct buffer_head **bh, s32 num_secs, bool read); int multi_sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh, s32 num_secs, bool sync); void bdev_open(struct super_block *sb); void bdev_close(struct super_block *sb); int bdev_read(struct super_block *sb, sector_t secno, struct buffer_head **bh, u32 num_secs, bool read); int bdev_write(struct super_block *sb, sector_t secno, struct buffer_head *bh, u32 num_secs, bool sync); int bdev_sync(struct super_block *sb); extern const u8 uni_upcase[]; #endif /* _EXFAT_H */
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