| /* 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 No effect | |
| * GRND_INSECURE Return non-cryptographic random bytes | |
| */ | |
| #define GRND_NONBLOCK 0x0001 | |
| #define GRND_RANDOM 0x0002 | |
| #define GRND_INSECURE 0x0004 | |
| #endif /* _UAPI_LINUX_RANDOM_H */ |