1 /*
2 * include/linux/random.h
3 *
4 * Include file for the random number generator.
5 */
6 #ifndef _LINUX_RANDOM_H
7 #define _LINUX_RANDOM_H
8
9 #include <linux/list.h>
10 #include <linux/once.h>
11
12 #include <uapi/linux/random.h>
13
14 struct random_ready_callback {
15 struct list_head list;
16 void (*func)(struct random_ready_callback *rdy);
17 struct module *owner;
18 };
19
20 extern void add_device_randomness(const void *, unsigned int);
21 extern void add_input_randomness(unsigned int type, unsigned int code,
22 unsigned int value);
23 extern void add_interrupt_randomness(int irq, int irq_flags);
24
25 extern void get_random_bytes(void *buf, int nbytes);
26 extern int add_random_ready_callback(struct random_ready_callback *rdy);
27 extern void del_random_ready_callback(struct random_ready_callback *rdy);
28 extern void get_random_bytes_arch(void *buf, int nbytes);
29 void generate_random_uuid(unsigned char uuid_out[16]);
30 extern int random_int_secret_init(void);
31
32 #ifndef MODULE
33 extern const struct file_operations random_fops, urandom_fops;
34 #endif
35
36 unsigned int get_random_int(void);
37 unsigned long get_random_long(void);
38 unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
39
40 /*
41 * This is designed to be standalone for just prandom
42 * users, but for now we include it from <linux/random.h>
43 * for legacy reasons.
44 */
45 #include <linux/prandom.h>
46
47 #ifdef CONFIG_ARCH_RANDOM
48 # include <asm/archrandom.h>
49 #else
arch_get_random_long(unsigned long * v)50 static inline int arch_get_random_long(unsigned long *v)
51 {
52 return 0;
53 }
arch_get_random_int(unsigned int * v)54 static inline int arch_get_random_int(unsigned int *v)
55 {
56 return 0;
57 }
arch_has_random(void)58 static inline int arch_has_random(void)
59 {
60 return 0;
61 }
arch_get_random_seed_long(unsigned long * v)62 static inline int arch_get_random_seed_long(unsigned long *v)
63 {
64 return 0;
65 }
arch_get_random_seed_int(unsigned int * v)66 static inline int arch_get_random_seed_int(unsigned int *v)
67 {
68 return 0;
69 }
arch_has_random_seed(void)70 static inline int arch_has_random_seed(void)
71 {
72 return 0;
73 }
74 #endif
75
76 #endif /* _LINUX_RANDOM_H */
77