mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
d848e5f8e1
Add a new ioctl which forces the the crng to be reseeded. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* 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 */
|