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Diffstat (limited to 'fs/exfat/exfat_core.h')
| -rw-r--r-- | fs/exfat/exfat_core.h | 671 |
1 files changed, 671 insertions, 0 deletions
diff --git a/fs/exfat/exfat_core.h b/fs/exfat/exfat_core.h new file mode 100644 index 000000000..4bdfe4ece --- /dev/null +++ b/fs/exfat/exfat_core.h @@ -0,0 +1,671 @@ +/* + * 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) +#define UTBL_COL_COUNT (1<<HIGH_INDEX_BIT) + +#if CONFIG_EXFAT_DEBUG_MSG +#define DPRINTK(...) \ + do { \ + printk("[EXFAT] " __VA_ARGS__); \ + } while (0) +#else +#define DPRINTK(...) +#endif + +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; +} +/*----------------------------------------------------------------------*/ +/* 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 */ |