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Diffstat (limited to 'fs/exfat/exfat_cache.h')
| -rw-r--r-- | fs/exfat/exfat_cache.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/fs/exfat/exfat_cache.h b/fs/exfat/exfat_cache.h new file mode 100644 index 000000000..d82aad58f --- /dev/null +++ b/fs/exfat/exfat_cache.h @@ -0,0 +1,85 @@ +/* + * 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 */ |