cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/random.h

 * include/linux/random.h
 * Include file for the random number generator.



#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 )

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          Use the /dev/random pool instead of /dev/urandom

#define GRND_NONBLOCK	0x0001

#define GRND_RANDOM	0x0002

#endif /* _UAPI_LINUX_RANDOM_H */

Overall Contributors

David Howells6788.16%150.00%
Theodore Y. Ts'o911.84%150.00%
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