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David Howells607ca462012-10-13 10:46:48 +01001/*
2 * include/linux/random.h
3 *
4 * Include file for the random number generator.
5 */
6
7#ifndef _UAPI_LINUX_RANDOM_H
8#define _UAPI_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 /* _UAPI_LINUX_RANDOM_H */