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a1d312de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * bitmap.h - Defines for NTFS kernel bitmap handling. Part of the Linux-NTFS | |
4 | * project. | |
5 | * | |
6 | * Copyright (c) 2004 Anton Altaparmakov | |
1da177e4 LT |
7 | */ |
8 | ||
9 | #ifndef _LINUX_NTFS_BITMAP_H | |
10 | #define _LINUX_NTFS_BITMAP_H | |
11 | ||
12 | #ifdef NTFS_RW | |
13 | ||
14 | #include <linux/fs.h> | |
15 | ||
16 | #include "types.h" | |
17 | ||
18 | extern int __ntfs_bitmap_set_bits_in_run(struct inode *vi, const s64 start_bit, | |
c49c3111 | 19 | const s64 count, const u8 value, const bool is_rollback); |
1da177e4 LT |
20 | |
21 | /** | |
22 | * ntfs_bitmap_set_bits_in_run - set a run of bits in a bitmap to a value | |
23 | * @vi: vfs inode describing the bitmap | |
24 | * @start_bit: first bit to set | |
25 | * @count: number of bits to set | |
26 | * @value: value to set the bits to (i.e. 0 or 1) | |
27 | * | |
28 | * Set @count bits starting at bit @start_bit in the bitmap described by the | |
29 | * vfs inode @vi to @value, where @value is either 0 or 1. | |
30 | * | |
31 | * Return 0 on success and -errno on error. | |
32 | */ | |
33 | static inline int ntfs_bitmap_set_bits_in_run(struct inode *vi, | |
34 | const s64 start_bit, const s64 count, const u8 value) | |
35 | { | |
36 | return __ntfs_bitmap_set_bits_in_run(vi, start_bit, count, value, | |
c49c3111 | 37 | false); |
1da177e4 LT |
38 | } |
39 | ||
40 | /** | |
41 | * ntfs_bitmap_set_run - set a run of bits in a bitmap | |
42 | * @vi: vfs inode describing the bitmap | |
43 | * @start_bit: first bit to set | |
44 | * @count: number of bits to set | |
45 | * | |
46 | * Set @count bits starting at bit @start_bit in the bitmap described by the | |
47 | * vfs inode @vi. | |
48 | * | |
49 | * Return 0 on success and -errno on error. | |
50 | */ | |
51 | static inline int ntfs_bitmap_set_run(struct inode *vi, const s64 start_bit, | |
52 | const s64 count) | |
53 | { | |
54 | return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 1); | |
55 | } | |
56 | ||
57 | /** | |
58 | * ntfs_bitmap_clear_run - clear a run of bits in a bitmap | |
59 | * @vi: vfs inode describing the bitmap | |
60 | * @start_bit: first bit to clear | |
61 | * @count: number of bits to clear | |
62 | * | |
63 | * Clear @count bits starting at bit @start_bit in the bitmap described by the | |
64 | * vfs inode @vi. | |
65 | * | |
66 | * Return 0 on success and -errno on error. | |
67 | */ | |
68 | static inline int ntfs_bitmap_clear_run(struct inode *vi, const s64 start_bit, | |
69 | const s64 count) | |
70 | { | |
71 | return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 0); | |
72 | } | |
73 | ||
74 | /** | |
75 | * ntfs_bitmap_set_bit - set a bit in a bitmap | |
76 | * @vi: vfs inode describing the bitmap | |
77 | * @bit: bit to set | |
78 | * | |
79 | * Set bit @bit in the bitmap described by the vfs inode @vi. | |
80 | * | |
81 | * Return 0 on success and -errno on error. | |
82 | */ | |
83 | static inline int ntfs_bitmap_set_bit(struct inode *vi, const s64 bit) | |
84 | { | |
85 | return ntfs_bitmap_set_run(vi, bit, 1); | |
86 | } | |
87 | ||
88 | /** | |
89 | * ntfs_bitmap_clear_bit - clear a bit in a bitmap | |
90 | * @vi: vfs inode describing the bitmap | |
91 | * @bit: bit to clear | |
92 | * | |
93 | * Clear bit @bit in the bitmap described by the vfs inode @vi. | |
94 | * | |
95 | * Return 0 on success and -errno on error. | |
96 | */ | |
97 | static inline int ntfs_bitmap_clear_bit(struct inode *vi, const s64 bit) | |
98 | { | |
99 | return ntfs_bitmap_clear_run(vi, bit, 1); | |
100 | } | |
101 | ||
102 | #endif /* NTFS_RW */ | |
103 | ||
104 | #endif /* defined _LINUX_NTFS_BITMAP_H */ |