Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * include/linux/random.h
3 *
4 * Include file for the random number generator.
5 */
6#ifndef _LINUX_RANDOM_H
7#define _LINUX_RANDOM_H
8
9#include <uapi/linux/random.h>
10
11
12extern void add_device_randomness(const void *, unsigned int);
13extern void add_input_randomness(unsigned int type, unsigned int code,
14 unsigned int value);
15extern void add_interrupt_randomness(int irq, int irq_flags);
16
17extern void get_random_bytes(void *buf, int nbytes);
18extern void get_random_bytes_arch(void *buf, int nbytes);
19void generate_random_uuid(unsigned char uuid_out[16]);
20
21#ifndef MODULE
22extern const struct file_operations random_fops, urandom_fops;
23#endif
24
25unsigned int get_random_int(void);
26unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
27
28u32 random32(void);
29void srandom32(u32 seed);
30
31u32 prandom32(struct rnd_state *);
32
33/*
34 * Handle minimum values for seeds
35 */
36static inline u32 __seed(u32 x, u32 m)
37{
38 return (x < m) ? x + m : x;
39}
40
41/**
42 * prandom32_seed - set seed for prandom32().
43 * @state: pointer to state structure to receive the seed.
44 * @seed: arbitrary 64-bit value to use as a seed.
45 */
46static inline void prandom32_seed(struct rnd_state *state, u64 seed)
47{
48 u32 i = (seed >> 32) ^ (seed << 10) ^ seed;
49
50 state->s1 = __seed(i, 1);
51 state->s2 = __seed(i, 7);
52 state->s3 = __seed(i, 15);
53}
54
55#ifdef CONFIG_ARCH_RANDOM
56# include <asm/archrandom.h>
57#else
58static inline int arch_get_random_long(unsigned long *v)
59{
60 return 0;
61}
62static inline int arch_get_random_int(unsigned int *v)
63{
64 return 0;
65}
66#endif
67
68#endif /* _LINUX_RANDOM_H */