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2 * bitmap.h - Defines for NTFS kernel bitmap handling. Part of the Linux-NTFS
5 * Copyright (c) 2004 Anton Altaparmakov
7 * This program/include file is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program/include file is distributed in the hope that it will be
13 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program (in the main directory of the Linux-NTFS
19 * distribution in the file COPYING); if not, write to the Free Software
20 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef _LINUX_NTFS_BITMAP_H
24 #define _LINUX_NTFS_BITMAP_H
32 extern int __ntfs_bitmap_set_bits_in_run(struct inode
*vi
, const s64 start_bit
,
33 const s64 count
, const u8 value
, const BOOL is_rollback
);
36 * ntfs_bitmap_set_bits_in_run - set a run of bits in a bitmap to a value
37 * @vi: vfs inode describing the bitmap
38 * @start_bit: first bit to set
39 * @count: number of bits to set
40 * @value: value to set the bits to (i.e. 0 or 1)
42 * Set @count bits starting at bit @start_bit in the bitmap described by the
43 * vfs inode @vi to @value, where @value is either 0 or 1.
45 * Return 0 on success and -errno on error.
47 static inline int ntfs_bitmap_set_bits_in_run(struct inode
*vi
,
48 const s64 start_bit
, const s64 count
, const u8 value
)
50 return __ntfs_bitmap_set_bits_in_run(vi
, start_bit
, count
, value
,
55 * ntfs_bitmap_set_run - set a run of bits in a bitmap
56 * @vi: vfs inode describing the bitmap
57 * @start_bit: first bit to set
58 * @count: number of bits to set
60 * Set @count bits starting at bit @start_bit in the bitmap described by the
63 * Return 0 on success and -errno on error.
65 static inline int ntfs_bitmap_set_run(struct inode
*vi
, const s64 start_bit
,
68 return ntfs_bitmap_set_bits_in_run(vi
, start_bit
, count
, 1);
72 * ntfs_bitmap_clear_run - clear a run of bits in a bitmap
73 * @vi: vfs inode describing the bitmap
74 * @start_bit: first bit to clear
75 * @count: number of bits to clear
77 * Clear @count bits starting at bit @start_bit in the bitmap described by the
80 * Return 0 on success and -errno on error.
82 static inline int ntfs_bitmap_clear_run(struct inode
*vi
, const s64 start_bit
,
85 return ntfs_bitmap_set_bits_in_run(vi
, start_bit
, count
, 0);
89 * ntfs_bitmap_set_bit - set a bit in a bitmap
90 * @vi: vfs inode describing the bitmap
93 * Set bit @bit in the bitmap described by the vfs inode @vi.
95 * Return 0 on success and -errno on error.
97 static inline int ntfs_bitmap_set_bit(struct inode
*vi
, const s64 bit
)
99 return ntfs_bitmap_set_run(vi
, bit
, 1);
103 * ntfs_bitmap_clear_bit - clear a bit in a bitmap
104 * @vi: vfs inode describing the bitmap
107 * Clear bit @bit in the bitmap described by the vfs inode @vi.
109 * Return 0 on success and -errno on error.
111 static inline int ntfs_bitmap_clear_bit(struct inode
*vi
, const s64 bit
)
113 return ntfs_bitmap_clear_run(vi
, bit
, 1);
118 #endif /* defined _LINUX_NTFS_BITMAP_H */