/* * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /************************************************************************/ /* */ /* PROJECT : exFAT & FAT12/16/32 File System */ /* FILE : exfat_core.h */ /* PURPOSE : Header File for exFAT File Manager */ /* */ /*----------------------------------------------------------------------*/ /* NOTES */ /* */ /*----------------------------------------------------------------------*/ /* REVISION HISTORY (Ver 0.9) */ /* */ /* - 2010.11.15 [Joosun Hahn] : first writing */ /* */ /************************************************************************/ #ifndef _EXFAT_H #define _EXFAT_H #include "exfat_config.h" #include "exfat_data.h" #include "exfat_oal.h" #include "exfat_blkdev.h" #include "exfat_cache.h" #include "exfat_nls.h" #include "exfat_api.h" #include "exfat_cache.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 availble 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 */ /*----------------------------------------------------------------------*/ /* Constant & Macro Definitions */ /*----------------------------------------------------------------------*/ #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 FALSE 0 #define TRUE 1 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #define MAX(a, b) (((a) > (b)) ? (a) : (b)) #define START_SECTOR(x) \ ((((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) \ ((((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 /* Upcase tabel mecro */ #define HIGH_INDEX_BIT (8) #define HIGH_INDEX_MASK (0xFF00) #define LOW_INDEX_BIT (16-HIGH_INDEX_BIT) #define UTBL_ROW_COUNT (1<> LOW_INDEX_BIT; } static inline u16 get_row_index(u16 i) { return i & ~HIGH_INDEX_MASK; } /*----------------------------------------------------------------------*/ /* Type Definitions */ /*----------------------------------------------------------------------*/ /* MS_DOS FAT partition boot record (512 bytes) */ typedef struct { u8 jmp_boot[3]; u8 oem_name[8]; u8 bpb[109]; u8 boot_code[390]; u8 signature[2]; } PBR_SECTOR_T; /* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */ typedef struct { 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]; } BPB16_T; /* MS-DOS FAT32 BIOS parameter block (79 bytes) */ typedef struct { 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]; } BPB32_T; /* MS-DOS EXFAT BIOS parameter block (109 bytes) */ typedef struct { 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]; } BPBEX_T; /* MS-DOS FAT file system information sector (512 bytes) */ typedef struct { u8 signature1[4]; u8 reserved1[480]; u8 signature2[4]; u8 free_cluster[4]; u8 next_cluster[4]; u8 reserved2[14]; u8 signature3[2]; } FSI_SECTOR_T; /* MS-DOS FAT directory entry (32 bytes) */ typedef struct { u8 dummy[32]; } DENTRY_T; typedef struct { 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]; } DOS_DENTRY_T; /* MS-DOS FAT extended directory entry (32 bytes) */ typedef struct { 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]; } EXT_DENTRY_T; /* MS-DOS EXFAT file directory entry (32 bytes) */ typedef struct { 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]; } FILE_DENTRY_T; /* MS-DOS EXFAT stream extension directory entry (32 bytes) */ typedef struct { 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]; } STRM_DENTRY_T; /* MS-DOS EXFAT file name directory entry (32 bytes) */ typedef struct { u8 type; u8 flags; u8 unicode_0_14[30]; } NAME_DENTRY_T; /* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */ typedef struct { u8 type; u8 flags; u8 reserved[18]; u8 start_clu[4]; u8 size[8]; } BMAP_DENTRY_T; /* MS-DOS EXFAT up-case table directory entry (32 bytes) */ typedef struct { u8 type; u8 reserved1[3]; u8 checksum[4]; u8 reserved2[12]; u8 start_clu[4]; u8 size[8]; } CASE_DENTRY_T; /* MS-DOS EXFAT volume label directory entry (32 bytes) */ typedef struct { u8 type; u8 label_len; u8 unicode_0_10[22]; u8 reserved[8]; } VOLM_DENTRY_T; /* unused entry hint information */ typedef struct { u32 dir; s32 entry; CHAIN_T clu; } UENTRY_T; typedef struct { s32 (*alloc_cluster)(struct super_block *sb, s32 num_alloc, CHAIN_T *p_chain); void (*free_cluster)(struct super_block *sb, CHAIN_T *p_chain, s32 do_relse); s32 (*count_used_clusters)(struct super_block *sb); s32 (*init_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 (*init_ext_entry)(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 num_entries, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); s32 (*find_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, s32 num_entries, DOS_NAME_T *p_dosname, u32 type); void (*delete_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 offset, s32 num_entries); void (*get_uni_name_from_ext_entry)(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u16 *uniname); s32 (*count_ext_entries)(struct super_block *sb, CHAIN_T *p_dir, s32 entry, DENTRY_T *p_entry); s32 (*calc_num_entries)(UNI_NAME_T *p_uniname); u32 (*get_entry_type)(DENTRY_T *p_entry); void (*set_entry_type)(DENTRY_T *p_entry, u32 type); u32 (*get_entry_attr)(DENTRY_T *p_entry); void (*set_entry_attr)(DENTRY_T *p_entry, u32 attr); u8 (*get_entry_flag)(DENTRY_T *p_entry); void (*set_entry_flag)(DENTRY_T *p_entry, u8 flag); u32 (*get_entry_clu0)(DENTRY_T *p_entry); void (*set_entry_clu0)(DENTRY_T *p_entry, u32 clu0); u64 (*get_entry_size)(DENTRY_T *p_entry); void (*set_entry_size)(DENTRY_T *p_entry, u64 size); void (*get_entry_time)(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); void (*set_entry_time)(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); } FS_FUNC_T; typedef struct __FS_INFO_T { u32 drv; /* drive ID */ u32 vol_type; /* volume FAT type */ u32 vol_id; /* volume serial number */ u32 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 */ UENTRY_T hint_uentry; /* unused entry hint information */ u32 dev_ejected; /* block device operation error flag */ FS_FUNC_T *fs_func; struct semaphore v_sem; /* FAT cache */ BUF_CACHE_T FAT_cache_array[FAT_CACHE_SIZE]; BUF_CACHE_T FAT_cache_lru_list; BUF_CACHE_T FAT_cache_hash_list[FAT_CACHE_HASH_SIZE]; /* buf cache */ BUF_CACHE_T buf_cache_array[BUF_CACHE_SIZE]; BUF_CACHE_T buf_cache_lru_list; BUF_CACHE_T buf_cache_hash_list[BUF_CACHE_HASH_SIZE]; } FS_INFO_T; #define ES_2_ENTRIES 2 #define ES_3_ENTRIES 3 #define ES_ALL_ENTRIES 0 typedef struct { u32 sector; /* sector number that contains file_entry */ s32 offset; /* byte offset in the sector */ s32 alloc_flag; /* flag in stream entry. 01 for cluster chain, 03 for contig. clusteres. */ u32 num_entries; /* __buf should be the last member */ void *__buf; } ENTRY_SET_CACHE_T; /*----------------------------------------------------------------------*/ /* External Function Declarations */ /*----------------------------------------------------------------------*/ /* file system initialization & shutdown functions */ s32 ffsInit(void); s32 ffsShutdown(void); /* volume management functions */ s32 ffsMountVol(struct super_block *sb); s32 ffsUmountVol(struct super_block *sb); s32 ffsCheckVol(struct super_block *sb); s32 ffsGetVolInfo(struct super_block *sb, VOL_INFO_T *info); s32 ffsSyncVol(struct super_block *sb, s32 do_sync); /* file management functions */ s32 ffsLookupFile(struct inode *inode, char *path, FILE_ID_T *fid); s32 ffsCreateFile(struct inode *inode, char *path, u8 mode, FILE_ID_T *fid); s32 ffsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *rcount); s32 ffsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *wcount); s32 ffsTruncateFile(struct inode *inode, u64 old_size, u64 new_size); s32 ffsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry); s32 ffsRemoveFile(struct inode *inode, FILE_ID_T *fid); s32 ffsSetAttr(struct inode *inode, u32 attr); s32 ffsGetStat(struct inode *inode, DIR_ENTRY_T *info); s32 ffsSetStat(struct inode *inode, DIR_ENTRY_T *info); s32 ffsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu); /* directory management functions */ s32 ffsCreateDir(struct inode *inode, char *path, FILE_ID_T *fid); s32 ffsReadDir(struct inode *inode, DIR_ENTRY_T *dir_ent); s32 ffsRemoveDir(struct inode *inode, FILE_ID_T *fid); /*----------------------------------------------------------------------*/ /* External Function Declarations (NOT TO UPPER LAYER) */ /*----------------------------------------------------------------------*/ /* fs management functions */ s32 fs_init(void); s32 fs_shutdown(void); void fs_set_vol_flags(struct super_block *sb, u32 new_flag); void fs_sync(struct super_block *sb, s32 do_sync); 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, CHAIN_T *p_chain); s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc, CHAIN_T *p_chain); void fat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, s32 do_relse); void exfat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, s32 do_relse); u32 find_last_cluster(struct super_block *sb, CHAIN_T *p_chain); s32 count_num_clusters(struct super_block *sb, 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(DENTRY_T *p_entry); u32 exfat_get_entry_type(DENTRY_T *p_entry); void fat_set_entry_type(DENTRY_T *p_entry, u32 type); void exfat_set_entry_type(DENTRY_T *p_entry, u32 type); u32 fat_get_entry_attr(DENTRY_T *p_entry); u32 exfat_get_entry_attr(DENTRY_T *p_entry); void fat_set_entry_attr(DENTRY_T *p_entry, u32 attr); void exfat_set_entry_attr(DENTRY_T *p_entry, u32 attr); u8 fat_get_entry_flag(DENTRY_T *p_entry); u8 exfat_get_entry_flag(DENTRY_T *p_entry); void fat_set_entry_flag(DENTRY_T *p_entry, u8 flag); void exfat_set_entry_flag(DENTRY_T *p_entry, u8 flag); u32 fat_get_entry_clu0(DENTRY_T *p_entry); u32 exfat_get_entry_clu0(DENTRY_T *p_entry); void fat_set_entry_clu0(DENTRY_T *p_entry, u32 start_clu); void exfat_set_entry_clu0(DENTRY_T *p_entry, u32 start_clu); u64 fat_get_entry_size(DENTRY_T *p_entry); u64 exfat_get_entry_size(DENTRY_T *p_entry); void fat_set_entry_size(DENTRY_T *p_entry, u64 size); void exfat_set_entry_size(DENTRY_T *p_entry, u64 size); void fat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); void exfat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); void fat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); void exfat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, u8 mode); s32 fat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 exfat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 type, u32 start_clu, u64 size); s32 fat_init_ext_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 num_entries, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); s32 exfat_init_ext_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 num_entries, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); void init_dos_entry(DOS_DENTRY_T *ep, u32 type, u32 start_clu); void init_ext_entry(EXT_DENTRY_T *ep, s32 order, u8 chksum, u16 *uniname); void init_file_entry(FILE_DENTRY_T *ep, u32 type); void init_strm_entry(STRM_DENTRY_T *ep, u8 flags, u32 start_clu, u64 size); void init_name_entry(NAME_DENTRY_T *ep, u16 *uniname); void fat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 order, s32 num_entries); void exfat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, s32 order, s32 num_entries); s32 find_location(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 *sector, s32 *offset); DENTRY_T *get_entry_with_sector(struct super_block *sb, u32 sector, s32 offset); DENTRY_T *get_entry_in_dir(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 *sector); ENTRY_SET_CACHE_T *get_entry_set_in_dir(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u32 type, DENTRY_T **file_ep); void release_entry_set(ENTRY_SET_CACHE_T *es); s32 write_whole_entry_set(struct super_block *sb, ENTRY_SET_CACHE_T *es); s32 write_partial_entries_in_entry_set(struct super_block *sb, ENTRY_SET_CACHE_T *es, DENTRY_T *ep, u32 count); s32 search_deleted_or_unused_entry(struct super_block *sb, CHAIN_T *p_dir, s32 num_entries); s32 find_empty_entry(struct inode *inode, CHAIN_T *p_dir, s32 num_entries); s32 fat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, s32 num_entries, DOS_NAME_T *p_dosname, u32 type); s32 exfat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, s32 num_entries, DOS_NAME_T *p_dosname, u32 type); s32 fat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, s32 entry, DENTRY_T *p_entry); s32 exfat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, s32 entry, DENTRY_T *p_entry); s32 count_dos_name_entries(struct super_block *sb, CHAIN_T *p_dir, u32 type); void update_dir_checksum(struct super_block *sb, CHAIN_T *p_dir, s32 entry); void update_dir_checksum_with_entry_set(struct super_block *sb, ENTRY_SET_CACHE_T *es); bool is_dir_empty(struct super_block *sb, CHAIN_T *p_dir); /* name conversion functions */ s32 get_num_entries_and_dos_name(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, s32 *entries, DOS_NAME_T *p_dosname); void get_uni_name_from_dos_entry(struct super_block *sb, DOS_DENTRY_T *ep, UNI_NAME_T *p_uniname, u8 mode); void fat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u16 *uniname); void exfat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, s32 entry, u16 *uniname); s32 extract_uni_name_from_ext_entry(EXT_DENTRY_T *ep, u16 *uniname, s32 order); s32 extract_uni_name_from_name_entry(NAME_DENTRY_T *ep, u16 *uniname, s32 order); s32 fat_generate_dos_name(struct super_block *sb, CHAIN_T *p_dir, DOS_NAME_T *p_dosname); void fat_attach_count_to_dos_name(u8 *dosname, s32 count); s32 fat_calc_num_entries(UNI_NAME_T *p_uniname); s32 exfat_calc_num_entries(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, CHAIN_T *p_dir, UNI_NAME_T *p_uniname); s32 resolve_name(u8 *name, u8 **arg); /* file operation functions */ s32 fat16_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); s32 fat32_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); s32 exfat_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); s32 create_dir(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, FILE_ID_T *fid); s32 create_file(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, u8 mode, FILE_ID_T *fid); void remove_file(struct inode *inode, CHAIN_T *p_dir, s32 entry); s32 rename_file(struct inode *inode, CHAIN_T *p_dir, s32 old_entry, UNI_NAME_T *p_uniname, FILE_ID_T *fid); s32 move_file(struct inode *inode, CHAIN_T *p_olddir, s32 oldentry, CHAIN_T *p_newdir, UNI_NAME_T *p_uniname, FILE_ID_T *fid); /* sector read/write functions */ s32 sector_read(struct super_block *sb, u32 sec, struct buffer_head **bh, s32 read); s32 sector_write(struct super_block *sb, u32 sec, struct buffer_head *bh, s32 sync); s32 multi_sector_read(struct super_block *sb, u32 sec, struct buffer_head **bh, s32 num_secs, s32 read); s32 multi_sector_write(struct super_block *sb, u32 sec, struct buffer_head *bh, s32 num_secs, s32 sync); #endif /* _EXFAT_H */