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exfat_api.h
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/*
* 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_api.h */
/* PURPOSE : Header File for exFAT API Glue Layer */
/* */
/*----------------------------------------------------------------------*/
/* NOTES */
/* */
/*----------------------------------------------------------------------*/
/* REVISION HISTORY (Ver 0.9) */
/* */
/* - 2010.11.15 [Joosun Hahn] : first writing */
/* */
/************************************************************************/
#ifndef _EXFAT_API_H
#define _EXFAT_API_H
#include <linux/fs.h>
#include "exfat_config.h"
/*----------------------------------------------------------------------*/
/* Constant & Macro Definitions */
/*----------------------------------------------------------------------*/
#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 file name including NULL */
#define MAX_PATH_LENGTH 260 /* max len of path name including NULL */
#define DOS_NAME_LENGTH 11 /* DOS file name length excluding NULL */
#define DOS_PATH_LENGTH 80 /* DOS path name 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
/*----------------------------------------------------------------------*/
/* Type Definitions */
/*----------------------------------------------------------------------*/
typedef struct {
u16 Year;
u16 Month;
u16 Day;
u16 Hour;
u16 Minute;
u16 Second;
u16 MilliSecond;
} DATE_TIME_T;
typedef struct {
u32 Offset; /* start sector number of the partition */
u32 Size; /* in sectors */
} PART_INFO_T;
typedef struct {
u32 SecSize; /* sector size in bytes */
u32 DevSize; /* block device size in sectors */
} DEV_INFO_T;
typedef struct {
u32 FatType;
u32 ClusterSize;
u32 NumClusters;
u32 FreeClusters;
u32 UsedClusters;
} VOL_INFO_T;
/* directory structure */
typedef struct {
u32 dir;
s32 size;
u8 flags;
} CHAIN_T;
/* file id structure */
typedef 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;
} FILE_ID_T;
typedef struct {
char Name[MAX_NAME_LENGTH * MAX_CHARSET_SIZE];
char ShortName[DOS_NAME_LENGTH + 2]; /* used only for FAT12/16/32, not used for exFAT */
u32 Attr;
u64 Size;
u32 NumSubdirs;
DATE_TIME_T CreateTimestamp;
DATE_TIME_T ModifyTimestamp;
DATE_TIME_T AccessTimestamp;
} DIR_ENTRY_T;
/*======================================================================*/
/* */
/* API FUNCTION DECLARATIONS */
/* (CHANGE THIS PART IF REQUIRED) */
/* */
/*======================================================================*/
/*----------------------------------------------------------------------*/
/* External Function Declarations */
/*----------------------------------------------------------------------*/
/* file system initialization & shutdown functions */
int FsInit(void);
int FsShutdown(void);
/* volume management functions */
int FsMountVol(struct super_block *sb);
int FsUmountVol(struct super_block *sb);
int FsGetVolInfo(struct super_block *sb, VOL_INFO_T *info);
int FsSyncVol(struct super_block *sb, int do_sync);
/* file management functions */
int FsLookupFile(struct inode *inode, char *path, FILE_ID_T *fid);
int FsCreateFile(struct inode *inode, char *path, u8 mode, FILE_ID_T *fid);
int FsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *rcount);
int FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, u64 count, u64 *wcount);
int FsTruncateFile(struct inode *inode, u64 old_size, u64 new_size);
int FsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry);
int FsRemoveFile(struct inode *inode, FILE_ID_T *fid);
int FsSetAttr(struct inode *inode, u32 attr);
int FsReadStat(struct inode *inode, DIR_ENTRY_T *info);
int FsWriteStat(struct inode *inode, DIR_ENTRY_T *info);
int FsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu);
/* directory management functions */
int FsCreateDir(struct inode *inode, char *path, FILE_ID_T *fid);
int FsReadDir(struct inode *inode, DIR_ENTRY_T *dir_entry);
int FsRemoveDir(struct inode *inode, FILE_ID_T *fid);
/* debug functions */
s32 FsReleaseCache(struct super_block *sb);
#endif /* _EXFAT_API_H */