[linux-2.6-block.git] / include / uapi / linux / random.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * include/linux/random.h
 *
 * Include file for the random number generator.
 */

#ifndef _UAPI_LINUX_RANDOM_H
#define _UAPI_LINUX_RANDOM_H

#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/irqnr.h>

/* ioctl()'s for the random number generator */

/* Get the entropy count. */
#define RNDGETENTCNT	_IOR( 'R', 0x00, int )

/* Add to (or subtract from) the entropy count.  (Superuser only.) */
#define RNDADDTOENTCNT	_IOW( 'R', 0x01, int )

/* Get the contents of the entropy pool.  (Superuser only.) */
#define RNDGETPOOL	_IOR( 'R', 0x02, int [2] )

/* 
 * Write bytes into the entropy pool and add to the entropy count.
 * (Superuser only.)
 */
#define RNDADDENTROPY	_IOW( 'R', 0x03, int [2] )

/* Clear entropy count to 0.  (Superuser only.) */
#define RNDZAPENTCNT	_IO( 'R', 0x04 )

/* Clear the entropy pool and associated counters.  (Superuser only.) */
#define RNDCLEARPOOL	_IO( 'R', 0x06 )

/* Reseed CRNG.  (Superuser only.) */
#define RNDRESEEDCRNG	_IO( 'R', 0x07 )

struct rand_pool_info {
	int	entropy_count;
	int	buf_size;
	__u32	buf[0];
};

/*
 * Flags for getrandom(2)
 *
 * GRND_NONBLOCK	Don't block and return EAGAIN instead
 * GRND_RANDOM		Use the /dev/random pool instead of /dev/urandom
 */
#define GRND_NONBLOCK	0x0001
#define GRND_RANDOM	0x0002

#endif /* _UAPI_LINUX_RANDOM_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	/*
	3	* include/linux/random.h
	4	*
	5	* Include file for the random number generator.
	6	*/
	7
	8	#ifndef _UAPI_LINUX_RANDOM_H
	9	#define _UAPI_LINUX_RANDOM_H
	10
	11	#include <linux/types.h>
	12	#include <linux/ioctl.h>
	13	#include <linux/irqnr.h>
	14
	15	/* ioctl()'s for the random number generator */
	16
	17	/* Get the entropy count. */
	18	#define RNDGETENTCNT _IOR( 'R', 0x00, int )
	19
	20	/* Add to (or subtract from) the entropy count. (Superuser only.) */
	21	#define RNDADDTOENTCNT _IOW( 'R', 0x01, int )
	22
	23	/* Get the contents of the entropy pool. (Superuser only.) */
	24	#define RNDGETPOOL _IOR( 'R', 0x02, int [2] )
	25
	26	/*
	27	* Write bytes into the entropy pool and add to the entropy count.
	28	* (Superuser only.)
	29	*/
	30	#define RNDADDENTROPY _IOW( 'R', 0x03, int [2] )
	31
	32	/* Clear entropy count to 0. (Superuser only.) */
	33	#define RNDZAPENTCNT _IO( 'R', 0x04 )
	34
	35	/* Clear the entropy pool and associated counters. (Superuser only.) */
	36	#define RNDCLEARPOOL _IO( 'R', 0x06 )
	37
d848e5f8 TT	38	/* Reseed CRNG. (Superuser only.) */
	39	#define RNDRESEEDCRNG _IO( 'R', 0x07 )
	40
607ca46e DH	41	struct rand_pool_info {
	42	int entropy_count;
	43	int buf_size;
	44	__u32 buf[0];
	45	};
	46
c6e9d6f3 TT	47	/*
	48	* Flags for getrandom(2)
	49	*
	50	* GRND_NONBLOCK Don't block and return EAGAIN instead
	51	* GRND_RANDOM Use the /dev/random pool instead of /dev/urandom
	52	*/
	53	#define GRND_NONBLOCK 0x0001
	54	#define GRND_RANDOM 0x0002
	55
607ca46e	56	#endif /* _UAPI_LINUX_RANDOM_H */