1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1
2 /*
3 * include/linux/random.h
4 *
5 * Include file for the random number generato
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
21 #define RNDADDTOENTCNT _IOW( 'R', 0x01, int )
22
23 /* Get the contents of the entropy pool. (Sup
24 #define RNDGETPOOL _IOR( 'R', 0x02, int [
25
26 /*
27 * Write bytes into the entropy pool and add t
28 * (Superuser only.)
29 */
30 #define RNDADDENTROPY _IOW( 'R', 0x03, int [
31
32 /* Clear entropy count to 0. (Superuser only.
33 #define RNDZAPENTCNT _IO( 'R', 0x04 )
34
35 /* Clear the entropy pool and associated count
36 #define RNDCLEARPOOL _IO( 'R', 0x06 )
37
38 /* Reseed CRNG. (Superuser only.) */
39 #define RNDRESEEDCRNG _IO( 'R', 0x07 )
40
41 struct rand_pool_info {
42 int entropy_count;
43 int buf_size;
44 __u32 buf[];
45 };
46
47 /*
48 * Flags for getrandom(2)
49 *
50 * GRND_NONBLOCK Don't block and return
51 * GRND_RANDOM No effect
52 * GRND_INSECURE Return non-cryptograph
53 */
54 #define GRND_NONBLOCK 0x0001
55 #define GRND_RANDOM 0x0002
56 #define GRND_INSECURE 0x0004
57
58 /**
59 * struct vgetrandom_opaque_params - arguments
60 *
61 * @size_per_opaque_state: Size of each s
62 * @mmap_prot: Value of the p
63 * @mmap_flags: Value of the f
64 * @reserved: Reserved for f
65 */
66 struct vgetrandom_opaque_params {
67 __u32 size_of_opaque_state;
68 __u32 mmap_prot;
69 __u32 mmap_flags;
70 __u32 reserved[13];
71 };
72
73 #endif /* _UAPI_LINUX_RANDOM_H */
74
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