usbloadergx/source/libntfs/device.h
giantpune 9e79c9d99b * remove little unused code
* code cleanup
2010-09-18 23:16:05 +00:00

132 lines
5.1 KiB
C

/*
* device.h - Exports for low level device io. Originated from 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 NTFS-3G
* 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 */