From d2e1446d81725c351dc73a03b397ce043fb18452 Mon Sep 17 00:00:00 2001 From: Meizu OpenSource Date: Mon, 15 Aug 2016 10:19:42 +0800 Subject: first commit --- include/linux/random.h | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 include/linux/random.h (limited to 'include/linux/random.h') diff --git a/include/linux/random.h b/include/linux/random.h new file mode 100644 index 000000000..bf9085e89 --- /dev/null +++ b/include/linux/random.h @@ -0,0 +1,77 @@ +/* + * include/linux/random.h + * + * Include file for the random number generator. + */ +#ifndef _LINUX_RANDOM_H +#define _LINUX_RANDOM_H + +#include + + +extern void add_device_randomness(const void *, unsigned int); +extern void add_input_randomness(unsigned int type, unsigned int code, + unsigned int value); +extern void add_interrupt_randomness(int irq, int irq_flags); + +extern void get_random_bytes(void *buf, int nbytes); +extern void get_random_bytes_arch(void *buf, int nbytes); +void generate_random_uuid(unsigned char uuid_out[16]); +extern int random_int_secret_init(void); + +#ifndef MODULE +extern const struct file_operations random_fops, urandom_fops; +#endif + +unsigned int get_random_int(void); +unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); + +u32 prandom_u32(void); +void prandom_bytes(void *buf, int nbytes); +void prandom_seed(u32 seed); + +u32 prandom_u32_state(struct rnd_state *); +void prandom_bytes_state(struct rnd_state *state, void *buf, int nbytes); + +/* + * Handle minimum values for seeds + */ +static inline u32 __seed(u32 x, u32 m) +{ + return (x < m) ? x + m : x; +} + +/** + * prandom_seed_state - set seed for prandom_u32_state(). + * @state: pointer to state structure to receive the seed. + * @seed: arbitrary 64-bit value to use as a seed. + */ +static inline void prandom_seed_state(struct rnd_state *state, u64 seed) +{ + u32 i = (seed >> 32) ^ (seed << 10) ^ seed; + + state->s1 = __seed(i, 2); + state->s2 = __seed(i, 8); + state->s3 = __seed(i, 16); +} + +#ifdef CONFIG_ARCH_RANDOM +# include +#else +static inline int arch_get_random_long(unsigned long *v) +{ + return 0; +} +static inline int arch_get_random_int(unsigned int *v) +{ + return 0; +} +#endif + +/* Pseudo random number generator from numerical recipes. */ +static inline u32 next_pseudo_random32(u32 seed) +{ + return seed * 1664525 + 1013904223; +} + +#endif /* _LINUX_RANDOM_H */ -- cgit v1.2.3