| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 1 | /* |
| 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 | |
| 37 | struct rand_pool_info { |
| 38 | int entropy_count; |
| 39 | int buf_size; |
| 40 | __u32 buf[0]; |
| 41 | }; |
| 42 | |
| Theodore Ts'o | c6e9d6f | 2014-07-17 04:13:05 -0400 | [diff] [blame] | 43 | /* |
| 44 | * Flags for getrandom(2) |
| 45 | * |
| 46 | * GRND_NONBLOCK Don't block and return EAGAIN instead |
| 47 | * GRND_RANDOM Use the /dev/random pool instead of /dev/urandom |
| 48 | */ |
| 49 | #define GRND_NONBLOCK 0x0001 |
| 50 | #define GRND_RANDOM 0x0002 |
| 51 | |
| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 52 | #endif /* _UAPI_LINUX_RANDOM_H */ |