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129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/*
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* device.h - Exports for low level device io. Originated from the Linux-NTFS project.
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*
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* Copyright (c) 2000-2006 Anton Altaparmakov
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the NTFS-3G
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _NTFS_DEVICE_H
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#define _NTFS_DEVICE_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "device_io.h"
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#include "types.h"
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#include "support.h"
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#include "volume.h"
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/**
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* enum ntfs_device_state_bits -
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*
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* Defined bits for the state field in the ntfs_device structure.
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*/
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typedef enum {
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ND_Open, /* 1: Device is open. */
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ND_ReadOnly, /* 1: Device is read-only. */
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ND_Dirty, /* 1: Device is dirty, needs sync. */
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ND_Block, /* 1: Device is a block device. */
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} ntfs_device_state_bits;
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#define test_ndev_flag(nd, flag) test_bit(ND_##flag, (nd)->d_state)
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#define set_ndev_flag(nd, flag) set_bit(ND_##flag, (nd)->d_state)
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#define clear_ndev_flag(nd, flag) clear_bit(ND_##flag, (nd)->d_state)
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#define NDevOpen(nd) test_ndev_flag(nd, Open)
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#define NDevSetOpen(nd) set_ndev_flag(nd, Open)
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#define NDevClearOpen(nd) clear_ndev_flag(nd, Open)
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#define NDevReadOnly(nd) test_ndev_flag(nd, ReadOnly)
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#define NDevSetReadOnly(nd) set_ndev_flag(nd, ReadOnly)
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#define NDevClearReadOnly(nd) clear_ndev_flag(nd, ReadOnly)
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#define NDevDirty(nd) test_ndev_flag(nd, Dirty)
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#define NDevSetDirty(nd) set_ndev_flag(nd, Dirty)
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#define NDevClearDirty(nd) clear_ndev_flag(nd, Dirty)
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#define NDevBlock(nd) test_ndev_flag(nd, Block)
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#define NDevSetBlock(nd) set_ndev_flag(nd, Block)
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#define NDevClearBlock(nd) clear_ndev_flag(nd, Block)
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/**
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* struct ntfs_device -
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*
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* The ntfs device structure defining all operations needed to access the low
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* level device underlying the ntfs volume.
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*/
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struct ntfs_device {
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struct ntfs_device_operations *d_ops; /* Device operations. */
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unsigned long d_state; /* State of the device. */
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char *d_name; /* Name of device. */
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void *d_private; /* Private data used by the
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device operations. */
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};
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struct stat;
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/**
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* struct ntfs_device_operations -
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*
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* The ntfs device operations defining all operations that can be performed on
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* the low level device described by an ntfs device structure.
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*/
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struct ntfs_device_operations {
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int (*open)(struct ntfs_device *dev, int flags);
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int (*close)(struct ntfs_device *dev);
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s64 (*seek)(struct ntfs_device *dev, s64 offset, int whence);
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s64 (*read)(struct ntfs_device *dev, void *buf, s64 count);
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s64 (*write)(struct ntfs_device *dev, const void *buf, s64 count);
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s64 (*pread)(struct ntfs_device *dev, void *buf, s64 count, s64 offset);
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s64 (*pwrite)(struct ntfs_device *dev, const void *buf, s64 count,
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s64 offset);
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int (*sync)(struct ntfs_device *dev);
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int (*stat)(struct ntfs_device *dev, struct stat *buf);
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int (*ioctl)(struct ntfs_device *dev, int request, void *argp);
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};
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extern struct ntfs_device *ntfs_device_alloc(const char *name, const long state,
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struct ntfs_device_operations *dops, void *priv_data);
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extern int ntfs_device_free(struct ntfs_device *dev);
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extern s64 ntfs_pread(struct ntfs_device *dev, const s64 pos, s64 count,
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void *b);
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extern s64 ntfs_pwrite(struct ntfs_device *dev, const s64 pos, s64 count,
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const void *b);
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extern s64 ntfs_mst_pread(struct ntfs_device *dev, const s64 pos, s64 count,
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const u32 bksize, void *b);
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extern s64 ntfs_mst_pwrite(struct ntfs_device *dev, const s64 pos, s64 count,
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const u32 bksize, void *b);
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extern s64 ntfs_cluster_read(const ntfs_volume *vol, const s64 lcn,
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const s64 count, void *b);
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extern s64 ntfs_cluster_write(const ntfs_volume *vol, const s64 lcn,
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const s64 count, const void *b);
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extern s64 ntfs_device_size_get(struct ntfs_device *dev, int block_size);
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extern s64 ntfs_device_partition_start_sector_get(struct ntfs_device *dev);
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extern int ntfs_device_heads_get(struct ntfs_device *dev);
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extern int ntfs_device_sectors_per_track_get(struct ntfs_device *dev);
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extern int ntfs_device_sector_size_get(struct ntfs_device *dev);
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extern int ntfs_device_block_size_set(struct ntfs_device *dev, int block_size);
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#endif /* defined _NTFS_DEVICE_H */
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