[linux-2.6-block.git] / include / linux / ratelimit.h

#ifndef _LINUX_RATELIMIT_H
#define _LINUX_RATELIMIT_H

#include <linux/param.h>
#include <linux/spinlock.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,				\
	}

static inline void ratelimit_state_init(struct ratelimit_state *rs,
					int interval, int burst)
{
	spin_lock_init(&rs->lock);
	rs->interval = interval;
	rs->burst = burst;
	rs->printed = 0;
	rs->missed = 0;
	rs->begin = 0;
}

extern struct ratelimit_state printk_ratelimit_state;

extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
#define __ratelimit(state) ___ratelimit(state, __func__)

#endif /* _LINUX_RATELIMIT_H */
Commit	Line	Data
	1	#ifndef _LINUX_RATELIMIT_H
	2	#define _LINUX_RATELIMIT_H
	3
	4	#include <linux/param.h>
	5	#include <linux/spinlock.h>
	6
	7	#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
	8	#define DEFAULT_RATELIMIT_BURST 10
	9
	10	struct ratelimit_state {
	11	spinlock_t lock; /* protect the state */
	12
	13	int interval;
	14	int burst;
	15	int printed;
	16	int missed;
	17	unsigned long begin;
	18	};
	19
	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	}
	27
	28	static inline void ratelimit_state_init(struct ratelimit_state *rs,
	29	int interval, int burst)
	30	{
	31	spin_lock_init(&rs->lock);
	32	rs->interval = interval;
	33	rs->burst = burst;
	34	rs->printed = 0;
	35	rs->missed = 0;
	36	rs->begin = 0;
	37	}
	38
	39	extern struct ratelimit_state printk_ratelimit_state;
	40
	41	extern int ___ratelimit(struct ratelimit_state rs, const char func);
	42	#define __ratelimit(state) ___ratelimit(state, __func__)
	43
	44	#endif /* _LINUX_RATELIMIT_H */