cregit-Linux how code gets into the kernel

Release 4.12 include/linux/random.h

Directory: include/linux
/*
 * include/linux/random.h
 *
 * Include file for the random number generator.
 */
#ifndef _LINUX_RANDOM_H

#define _LINUX_RANDOM_H

#include <linux/list.h>
#include <linux/once.h>

#include <uapi/linux/random.h>


struct random_ready_callback {
	
struct list_head list;
	
void (*func)(struct random_ready_callback *rdy);
	
struct module *owner;
};

extern void add_device_randomness(const void *, unsigned int);

#if defined(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) && !defined(__CHECKER__)

static inline void add_latent_entropy(void) { add_device_randomness((const void *)&latent_entropy, sizeof(latent_entropy)); }

Contributors

PersonTokensPropCommitsCommitProp
Emese Revfy25100.00%1100.00%
Total25100.00%1100.00%

#else
static inline void add_latent_entropy(void) {}

Contributors

PersonTokensPropCommitsCommitProp
Emese Revfy8100.00%1100.00%
Total8100.00%1100.00%

#endif extern void add_input_randomness(unsigned int type, unsigned int code, unsigned int value) __latent_entropy; extern void add_interrupt_randomness(int irq, int irq_flags) __latent_entropy; extern void get_random_bytes(void *buf, int nbytes); extern int add_random_ready_callback(struct random_ready_callback *rdy); extern void del_random_ready_callback(struct random_ready_callback *rdy); extern void get_random_bytes_arch(void *buf, int nbytes); #ifndef MODULE extern const struct file_operations random_fops, urandom_fops; #endif u32 get_random_u32(void); u64 get_random_u64(void);
static inline unsigned int get_random_int(void) { return get_random_u32(); }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld14100.00%1100.00%
Total14100.00%1100.00%


static inline unsigned long get_random_long(void) { #if BITS_PER_LONG == 64 return get_random_u64(); #else return get_random_u32(); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Jason A. Donenfeld2177.78%133.33%
Daniel Cashman414.81%133.33%
Arjan van de Ven27.41%133.33%
Total27100.00%3100.00%

unsigned long randomize_page(unsigned long start, unsigned long range); u32 prandom_u32(void); void prandom_bytes(void *buf, size_t nbytes); void prandom_seed(u32 seed); void prandom_reseed_late(void); struct rnd_state { __u32 s1, s2, s3, s4; }; u32 prandom_u32_state(struct rnd_state *state); void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes); void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state); #define prandom_init_once(pcpu_state) \ DO_ONCE(prandom_seed_full_state, (pcpu_state)) /** * prandom_u32_max - returns a pseudo-random number in interval [0, ep_ro) * @ep_ro: right open interval endpoint * * Returns a pseudo-random number that is in interval [0, ep_ro). Note * that the result depends on PRNG being well distributed in [0, ~0U] * u32 space. Here we use maximally equidistributed combined Tausworthe * generator, that is, prandom_u32(). This is useful when requesting a * random index of an array containing ep_ro elements, for example. * * Returns: pseudo-random number in interval [0, ep_ro) */
static inline u32 prandom_u32_max(u32 ep_ro) { return (u32)(((u64) prandom_u32() * ep_ro) >> 32); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Borkmann28100.00%1100.00%
Total28100.00%1100.00%

/* * Handle minimum values for seeds */
static inline u32 __seed(u32 x, u32 m) { return (x < m) ? x + m : x; }

Contributors

PersonTokensPropCommitsCommitProp
Joe Eykholt26100.00%1100.00%
Total26100.00%1100.00%

/** * 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, 2U); state->s2 = __seed(i, 8U); state->s3 = __seed(i, 16U); state->s4 = __seed(i, 128U); }

Contributors

PersonTokensPropCommitsCommitProp
Joe Eykholt6180.26%133.33%
Daniel Borkmann1418.42%133.33%
Akinobu Mita11.32%133.33%
Total76100.00%3100.00%

#ifdef CONFIG_ARCH_RANDOM # include <asm/archrandom.h> #else
static inline bool arch_get_random_long(unsigned long *v) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin15100.00%2100.00%
Total15100.00%2100.00%


static inline bool arch_get_random_int(unsigned int *v) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin15100.00%2100.00%
Total15100.00%2100.00%


static inline bool arch_has_random(void) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin12100.00%2100.00%
Total12100.00%2100.00%


static inline bool arch_get_random_seed_long(unsigned long *v) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin15100.00%2100.00%
Total15100.00%2100.00%


static inline bool arch_get_random_seed_int(unsigned int *v) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin15100.00%2100.00%
Total15100.00%2100.00%


static inline bool arch_has_random_seed(void) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
H. Peter Anvin12100.00%2100.00%
Total12100.00%2100.00%

#endif /* Pseudo random number generator from numerical recipes. */
static inline u32 next_pseudo_random32(u32 seed) { return seed * 1664525 + 1013904223; }

Contributors

PersonTokensPropCommitsCommitProp
Tom Herbert17100.00%1100.00%
Total17100.00%1100.00%

#endif /* _LINUX_RANDOM_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Joe Eykholt9516.07%12.94%
H. Peter Anvin9415.91%411.76%
Daniel Borkmann8113.71%514.71%
Emese Revfy6010.15%25.88%
Herbert Xu498.29%12.94%
Linus Torvalds (pre-git)447.45%514.71%
Jason A. Donenfeld437.28%12.94%
Akinobu Mita305.08%25.88%
Tom Herbert183.05%12.94%
Theodore Y. Ts'o132.20%25.88%
Linus Torvalds122.03%12.94%
Stephen Hemminger111.86%12.94%
Jason Cooper111.86%12.94%
Matt Mackall91.52%12.94%
Arjan van de Ven71.18%25.88%
Daniel Cashman61.02%12.94%
Hannes Frederic Sowa61.02%12.94%
Stephan Mueller10.17%12.94%
David Howells10.17%12.94%
Total591100.00%34100.00%
Directory: include/linux
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