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 37 struct rand_pool_info { 38 int entropy_count; 39 int buf_size; 40 __u32 buf[0]; 41 }; 42 43 struct rnd_state { 44 __u32 s1, s2, s3; 45 }; 46 47 /* Exported functions */ 48 49 50 #endif /* _LINUX_RANDOM_H */ 51
