1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * bitmap.h - Defines for NTFS kernel bitmap handling. Part of the Linux-NTFS
6 * Copyright (c) 2004 Anton Altaparmakov
9 #ifndef _LINUX_NTFS_BITMAP_H
10 #define _LINUX_NTFS_BITMAP_H
18 extern int __ntfs_bitmap_set_bits_in_run(struct inode *vi, const s64 start_bit,
19 const s64 count, const u8 value, const bool is_rollback);
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)
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.
31 * Return 0 on success and -errno on error.
33 static inline int ntfs_bitmap_set_bits_in_run(struct inode *vi,
34 const s64 start_bit, const s64 count, const u8 value)
36 return __ntfs_bitmap_set_bits_in_run(vi, start_bit, count, value,
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
46 * Set @count bits starting at bit @start_bit in the bitmap described by the
49 * Return 0 on success and -errno on error.
51 static inline int ntfs_bitmap_set_run(struct inode *vi, const s64 start_bit,
54 return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 1);
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
63 * Clear @count bits starting at bit @start_bit in the bitmap described by the
66 * Return 0 on success and -errno on error.
68 static inline int ntfs_bitmap_clear_run(struct inode *vi, const s64 start_bit,
71 return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 0);
75 * ntfs_bitmap_set_bit - set a bit in a bitmap
76 * @vi: vfs inode describing the bitmap
79 * Set bit @bit in the bitmap described by the vfs inode @vi.
81 * Return 0 on success and -errno on error.
83 static inline int ntfs_bitmap_set_bit(struct inode *vi, const s64 bit)
85 return ntfs_bitmap_set_run(vi, bit, 1);
89 * ntfs_bitmap_clear_bit - clear a bit in a bitmap
90 * @vi: vfs inode describing the bitmap
93 * Clear 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_clear_bit(struct inode *vi, const s64 bit)
99 return ntfs_bitmap_clear_run(vi, bit, 1);
104 #endif /* defined _LINUX_NTFS_BITMAP_H */