first commit

1 files changed, 77 insertions, 0 deletions

diff --git a/include/linux/random.h b/include/linux/random.h
new file mode 100644
index 000000000..bf9085e89
--- /dev/null
+++ b/include/linux/random.h
@@ -0,0 +1,77 @@
+/*
+ * include/linux/random.h
+ *
+ * Include file for the random number generator.
+ */
+#ifndef _LINUX_RANDOM_H
+#define _LINUX_RANDOM_H
+
+#include <uapi/linux/random.h>
+
+
+extern void add_device_randomness(const void *, unsigned int);
+extern void add_input_randomness(unsigned int type, unsigned int code,
+				 unsigned int value);
+extern void add_interrupt_randomness(int irq, int irq_flags);
+
+extern void get_random_bytes(void *buf, int nbytes);
+extern void get_random_bytes_arch(void *buf, int nbytes);
+void generate_random_uuid(unsigned char uuid_out[16]);
+extern int random_int_secret_init(void);
+
+#ifndef MODULE
+extern const struct file_operations random_fops, urandom_fops;
+#endif
+
+unsigned int get_random_int(void);
+unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
+
+u32 prandom_u32(void);
+void prandom_bytes(void *buf, int nbytes);
+void prandom_seed(u32 seed);
+
+u32 prandom_u32_state(struct rnd_state *);
+void prandom_bytes_state(struct rnd_state *state, void *buf, int nbytes);
+
+/*
+ * Handle minimum values for seeds
+ */
+static inline u32 __seed(u32 x, u32 m)
+{
+	return (x < m) ? x + m : x;
+}
+
+/**
+ * prandom_seed_state - set seed for prandom_u32_state().
+ * @state: pointer to state structure to receive the seed.
+ * @seed: arbitrary 64-bit value to use as a seed.
+ */
+static inline void prandom_seed_state(struct rnd_state *state, u64 seed)
+{
+	u32 i = (seed >> 32) ^ (seed << 10) ^ seed;
+
+	state->s1 = __seed(i, 2);
+	state->s2 = __seed(i, 8);
+	state->s3 = __seed(i, 16);
+}
+
+#ifdef CONFIG_ARCH_RANDOM
+# include <asm/archrandom.h>
+#else
+static inline int arch_get_random_long(unsigned long *v)
+{
+	return 0;
+}
+static inline int arch_get_random_int(unsigned int *v)
+{
+	return 0;
+}
+#endif
+
+/* Pseudo random number generator from numerical recipes. */
+static inline u32 next_pseudo_random32(u32 seed)
+{
+	return seed * 1664525 + 1013904223;
+}
+
+#endif /* _LINUX_RANDOM_H */