linux/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 …

/* Add to (or subtract from) the entropy count.  (Superuser only.) */
#define RNDADDTOENTCNT …

/* Get the contents of the entropy pool.  (Superuser only.) (Removed in 2.6.9-rc2.) */
#define RNDGETPOOL …

/* 
 * Write bytes into the entropy pool and add to the entropy count.
 * (Superuser only.)
 */
#define RNDADDENTROPY …

/* Clear entropy count to 0.  (Superuser only.) */
#define RNDZAPENTCNT …

/* Clear the entropy pool and associated counters.  (Superuser only.) */
#define RNDCLEARPOOL …

/* Reseed CRNG.  (Superuser only.) */
#define RNDRESEEDCRNG …

struct rand_pool_info { … };

/*
 * Flags for getrandom(2)
 *
 * GRND_NONBLOCK	Don't block and return EAGAIN instead
 * GRND_RANDOM		No effect
 * GRND_INSECURE	Return non-cryptographic random bytes
 */
#define GRND_NONBLOCK …
#define GRND_RANDOM …
#define GRND_INSECURE …

/**
 * struct vgetrandom_opaque_params - arguments for allocating memory for vgetrandom
 *
 * @size_per_opaque_state:	Size of each state that is to be passed to vgetrandom().
 * @mmap_prot:			Value of the prot argument in mmap(2).
 * @mmap_flags:			Value of the flags argument in mmap(2).
 * @reserved:			Reserved for future use.
 */
struct vgetrandom_opaque_params { … };

#endif /* _UAPI_LINUX_RANDOM_H */