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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
* bitmap . h - Defines for NTFS kernel bitmap handling . Part of the Linux - NTFS
* project .
*
* Copyright ( c ) 2004 Anton Altaparmakov
*/
# 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 ,
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const s64 count , const u8 value , const bool is_rollback ) ;
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/**
* 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 ,
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false ) ;
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}
/**
* 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 */