/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_RATELIMIT_TYPES_H #define _LINUX_RATELIMIT_TYPES_H #include <linux/bits.h> #include <linux/param.h> #include <linux/spinlock_types_raw.h> #define DEFAULT_RATELIMIT_INTERVAL (5 * HZ) #define DEFAULT_RATELIMIT_BURST 10 /* issue num suppressed message on exit */ #define RATELIMIT_MSG_ON_RELEASE BIT(0) struct ratelimit_state { raw_spinlock_t lock; /* protect the state */ int interval; int burst; int printed; int missed; unsigned long begin; unsigned long flags; }; #define RATELIMIT_STATE_INIT_FLAGS(name, interval_init, burst_init, flags_init) { \ .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \ .interval = interval_init, \ .burst = burst_init, \ .flags = flags_init, \ } #define RATELIMIT_STATE_INIT(name, interval_init, burst_init) \ RATELIMIT_STATE_INIT_FLAGS(name, interval_init, burst_init, 0) #define RATELIMIT_STATE_INIT_DISABLED \ RATELIMIT_STATE_INIT(ratelimit_state, 0, DEFAULT_RATELIMIT_BURST) #define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ \ struct ratelimit_state name = \ RATELIMIT_STATE_INIT(name, interval_init, burst_init) \ extern int ___ratelimit(struct ratelimit_state *rs, const char *func); #define __ratelimit(state) ___ratelimit(state, __func__) #endif /* _LINUX_RATELIMIT_TYPES_H */