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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_cache.h */
/* PURPOSE : Header File for exFAT Cache Manager */
/* (FAT Cache & Buffer Cache) */
/* */
/*----------------------------------------------------------------------*/
/* NOTES */
/* */
/*----------------------------------------------------------------------*/
/* REVISION HISTORY (Ver 0.9) */
/* */
/* - 2010.11.15 [Sung-Kwan Kim] : first writing */
/* */
/************************************************************************/
#ifndef _EXFAT_CACHE_H
#define _EXFAT_CACHE_H
#include <linux/fs.h>
#include <linux/types.h>
#include "exfat_config.h"
/*----------------------------------------------------------------------*/
/* Constant & Macro Definitions */
/*----------------------------------------------------------------------*/
#define LOCKBIT 0x01
#define DIRTYBIT 0x02
/*----------------------------------------------------------------------*/
/* Type Definitions */
/*----------------------------------------------------------------------*/
typedef 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;
u32 sec;
u32 flag;
struct buffer_head *buf_bh;
} BUF_CACHE_T;
/*----------------------------------------------------------------------*/
/* External Function Declarations */
/*----------------------------------------------------------------------*/
s32 buf_init(struct super_block *sb);
s32 buf_shutdown(struct super_block *sb);
s32 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, u32 sec);
void FAT_modify(struct super_block *sb, u32 sec);
void FAT_release_all(struct super_block *sb);
void FAT_sync(struct super_block *sb);
u8 *buf_getblk(struct super_block *sb, u32 sec);
void buf_modify(struct super_block *sb, u32 sec);
void buf_lock(struct super_block *sb, u32 sec);
void buf_unlock(struct super_block *sb, u32 sec);
void buf_release(struct super_block *sb, u32 sec);
void buf_release_all(struct super_block *sb);
void buf_sync(struct super_block *sb);
#endif /* _EXFAT_CACHE_H */