[mirror_ubuntu-bionic-kernel.git] / include / linux / ratelimit.h

#ifndef _LINUX_RATELIMIT_H
#define _LINUX_RATELIMIT_H

#include <linux/param.h>
#include <linux/spinlock_types.h>

#define DEFAULT_RATELIMIT_INTERVAL	(5 * HZ)
#define DEFAULT_RATELIMIT_BURST		10

struct ratelimit_state {
	spinlock_t	lock;		/* protect the state */

	int		interval;
	int		burst;
	int		printed;
	int		missed;
	unsigned long	begin;
};

#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init)		\
									\
	struct ratelimit_state name = {					\
		.lock		= __SPIN_LOCK_UNLOCKED(name.lock),	\
		.interval	= interval_init,			\
		.burst		= burst_init,				\
	}

extern int __ratelimit(struct ratelimit_state *rs);

#endif /* _LINUX_RATELIMIT_H */
Commit	Line	Data
717115e1 DY	1	#ifndef _LINUX_RATELIMIT_H
717115e1 DY	2	#define _LINUX_RATELIMIT_H
979f693d	3
717115e1	4	#include <linux/param.h>
979f693d	5	#include <linux/spinlock_types.h>
717115e1	6
979f693d IM	7	#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
979f693d IM	8	#define DEFAULT_RATELIMIT_BURST 10
717115e1 DY	9
717115e1 DY	10	struct ratelimit_state {
979f693d IM	11	spinlock_t lock; /* protect the state */
	12
	13	int interval;
	14	int burst;
	15	int printed;
	16	int missed;
	17	unsigned long begin;
717115e1 DY	18	};
717115e1 DY	19
979f693d IM	20	#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \
	21	\
	22	struct ratelimit_state name = { \
	23	.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
	24	.interval = interval_init, \
	25	.burst = burst_init, \
	26	}
717115e1 DY	27
717115e1 DY	28	extern int __ratelimit(struct ratelimit_state *rs);
979f693d IM	29
979f693d IM	30	#endif /* _LINUX_RATELIMIT_H */