/* * device.h - Exports for low level device io. Part of the Linux-NTFS project. * * Copyright (c) 2000-2006 Anton Altaparmakov * * This program/include file 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/include file 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 (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#ifndef _NTFS_DEVICE_H#define _NTFS_DEVICE_H#ifdef HAVE_CONFIG_H#include "config.h"#endif#include "device_io.h"#include "types.h"#include "support.h"#include "volume.h"/** * enum ntfs_device_state_bits - * * Defined bits for the state field in the ntfs_device structure. */typedef enum {	ND_Open,	/* 1: Device is open. */	ND_ReadOnly,	/* 1: Device is read-only. */	ND_Dirty,	/* 1: Device is dirty, needs sync. */	ND_Block,	/* 1: Device is a block device. */} ntfs_device_state_bits;#define  test_ndev_flag(nd, flag)	   test_bit(ND_##flag, (nd)->d_state)#define   set_ndev_flag(nd, flag)	    set_bit(ND_##flag, (nd)->d_state)#define clear_ndev_flag(nd, flag)	  clear_bit(ND_##flag, (nd)->d_state)#define NDevOpen(nd)		 test_ndev_flag(nd, Open)#define NDevSetOpen(nd)		  set_ndev_flag(nd, Open)#define NDevClearOpen(nd)	clear_ndev_flag(nd, Open)#define NDevReadOnly(nd)	 test_ndev_flag(nd, ReadOnly)#define NDevSetReadOnly(nd)	  set_ndev_flag(nd, ReadOnly)#define NDevClearReadOnly(nd)	clear_ndev_flag(nd, ReadOnly)#define NDevDirty(nd)		 test_ndev_flag(nd, Dirty)#define NDevSetDirty(nd)	  set_ndev_flag(nd, Dirty)#define NDevClearDirty(nd)	clear_ndev_flag(nd, Dirty)#define NDevBlock(nd)		 test_ndev_flag(nd, Block)#define NDevSetBlock(nd)	  set_ndev_flag(nd, Block)#define NDevClearBlock(nd)	clear_ndev_flag(nd, Block)/** * struct ntfs_device - * * The ntfs device structure defining all operations needed to access the low * level device underlying the ntfs volume. */struct ntfs_device {	struct ntfs_device_operations *d_ops;	/* Device operations. */	unsigned long d_state;			/* State of the device. */	char *d_name;				/* Name of device. */	void *d_private;			/* Private data used by the						   device operations. */};struct stat;/** * struct ntfs_device_operations - * * The ntfs device operations defining all operations that can be performed on * the low level device described by an ntfs device structure. */struct ntfs_device_operations {	int (*open)(struct ntfs_device *dev, int flags);	int (*close)(struct ntfs_device *dev);	s64 (*seek)(struct ntfs_device *dev, s64 offset, int whence);	s64 (*read)(struct ntfs_device *dev, void *buf, s64 count);	s64 (*write)(struct ntfs_device *dev, const void *buf, s64 count);	s64 (*pread)(struct ntfs_device *dev, void *buf, s64 count, s64 offset);	s64 (*pwrite)(struct ntfs_device *dev, const void *buf, s64 count,			s64 offset);	int (*sync)(struct ntfs_device *dev);	int (*stat)(struct ntfs_device *dev, struct stat *buf);	int (*ioctl)(struct ntfs_device *dev, int request, void *argp);};extern struct ntfs_device *ntfs_device_alloc(const char *name, const long state,		struct ntfs_device_operations *dops, void *priv_data);extern int ntfs_device_free(struct ntfs_device *dev);extern s64 ntfs_pread(struct ntfs_device *dev, const s64 pos, s64 count,		void *b);extern s64 ntfs_pwrite(struct ntfs_device *dev, const s64 pos, s64 count,		const void *b);extern s64 ntfs_mst_pread(struct ntfs_device *dev, const s64 pos, s64 count,		const u32 bksize, void *b);extern s64 ntfs_mst_pwrite(struct ntfs_device *dev, const s64 pos, s64 count,		const u32 bksize, void *b);extern s64 ntfs_cluster_read(const ntfs_volume *vol, const s64 lcn,		const s64 count, void *b);extern s64 ntfs_cluster_write(const ntfs_volume *vol, const s64 lcn,		const s64 count, const void *b);extern s64 ntfs_device_size_get(struct ntfs_device *dev, int block_size);extern s64 ntfs_device_partition_start_sector_get(struct ntfs_device *dev);extern int ntfs_device_heads_get(struct ntfs_device *dev);extern int ntfs_device_sectors_per_track_get(struct ntfs_device *dev);extern int ntfs_device_sector_size_get(struct ntfs_device *dev);extern int ntfs_device_block_size_set(struct ntfs_device *dev, int block_size);#endif /* defined _NTFS_DEVICE_H */