/*
* bitmap.h - Defines for NTFS kernel bitmap handling. Part of the Linux-NTFS
* project.
*
* Copyright (c) 2004 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 _LINUX_NTFS_BITMAP_H
#define _LINUX_NTFS_BITMAP_H
#ifdef NTFS_RW
#include <linux/fs.h>
#include "types.h"
extern int __ntfs_bitmap_set_bits_in_run(struct inode *vi, const s64 start_bit,
const s64 count, const u8 value, const bool is_rollback);
/**
* ntfs_bitmap_set_bits_in_run - set a run of bits in a bitmap to a value
* @vi: vfs inode describing the bitmap
* @start_bit: first bit to set
* @count: number of bits to set
* @value: value to set the bits to (i.e. 0 or 1)
*
* Set @count bits starting at bit @start_bit in the bitmap described by the
* vfs inode @vi to @value, where @value is either 0 or 1.
*
* Return 0 on success and -errno on error.
*/
static inline int ntfs_bitmap_set_bits_in_run(struct inode *vi,
const s64 start_bit, const s64 count, const u8 value)
{
return __ntfs_bitmap_set_bits_in_run(vi, start_bit, count, value,
false);
}
/**
* ntfs_bitmap_set_run - set a run of bits in a bitmap
* @vi: vfs inode describing the bitmap
* @start_bit: first bit to set
* @count: number of bits to set
*
* Set @count bits starting at bit @start_bit in the bitmap described by the
* vfs inode @vi.
*
* Return 0 on success and -errno on error.
*/
static inline int ntfs_bitmap_set_run(struct inode *vi, const s64 start_bit,
const s64 count)
{
return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 1);
}
/**
* ntfs_bitmap_clear_run - clear a run of bits in a bitmap
* @vi: vfs inode describing the bitmap
* @start_bit: first bit to clear
* @count: number of bits to clear
*
* Clear @count bits starting at bit @start_bit in the bitmap described by the
* vfs inode @vi.
*
* Return 0 on success and -errno on error.
*/
static inline int ntfs_bitmap_clear_run(struct inode *vi, const s64 start_bit,
const s64 count)
{
return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 0);
}
/**
* ntfs_bitmap_set_bit - set a bit in a bitmap
* @vi: vfs inode describing the bitmap
* @bit: bit to set
*
* Set bit @bit in the bitmap described by the vfs inode @vi.
*
* Return 0 on success and -errno on error.
*/
static inline int ntfs_bitmap_set_bit(struct inode *vi, const s64 bit)
{
return ntfs_bitmap_set_run(vi, bit, 1);
}
/**
* ntfs_bitmap_clear_bit - clear a bit in a bitmap
* @vi: vfs inode describing the bitmap
* @bit: bit to clear
*
* Clear bit @bit in the bitmap described by the vfs inode @vi.
*
* Return 0 on success and -errno on error.
*/
static inline int ntfs_bitmap_clear_bit(struct inode *vi, const s64 bit)
{
return ntfs_bitmap_clear_run(vi, bit, 1);
}
#endif /* NTFS_RW */
#endif /* defined _LINUX_NTFS_BITMAP_H */
