1/* 2 * include/linux/random.h 3 * 4 * Include file for the random number generator. 5 */ 6 7#ifndef _LINUX_RANDOM_H 8#define _LINUX_RANDOM_H 9 10#include <linux/types.h> 11#include <linux/ioctl.h> 12#include <linux/irqnr.h> 13 14/* ioctl()'s for the random number generator */ 15 16/* Get the entropy count. */ 17#define RNDGETENTCNT _IOR( 'R', 0x00, int ) 18 19/* Add to (or subtract from) the entropy count. (Superuser only.) */ 20#define RNDADDTOENTCNT _IOW( 'R', 0x01, int ) 21 22/* Get the contents of the entropy pool. (Superuser only.) */ 23#define RNDGETPOOL _IOR( 'R', 0x02, int [2] ) 24 25/* 26 * Write bytes into the entropy pool and add to the entropy count. 27 * (Superuser only.) 28 */ 29#define RNDADDENTROPY _IOW( 'R', 0x03, int [2] ) 30 31/* Clear entropy count to 0. (Superuser only.) */ 32#define RNDZAPENTCNT _IO( 'R', 0x04 ) 33 34/* Clear the entropy pool and associated counters. (Superuser only.) */ 35#define RNDCLEARPOOL _IO( 'R', 0x06 ) 36 37struct rand_pool_info { 38 int entropy_count; 39 int buf_size; 40 __u32 buf[0]; 41}; 42 43struct rnd_state { 44 __u32 s1, s2, s3; 45}; 46 47/* Exported functions */ 48 49 50#endif /* _LINUX_RANDOM_H */ 51