ratelimit_types.h 1.1 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243
  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _LINUX_RATELIMIT_TYPES_H
  3. #define _LINUX_RATELIMIT_TYPES_H
  4. #include <linux/bits.h>
  5. #include <linux/param.h>
  6. #include <linux/spinlock_types.h>
  7. #define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
  8. #define DEFAULT_RATELIMIT_BURST 10
  9. /* issue num suppressed message on exit */
  10. #define RATELIMIT_MSG_ON_RELEASE BIT(0)
  11. struct ratelimit_state {
  12. raw_spinlock_t lock; /* protect the state */
  13. int interval;
  14. int burst;
  15. int printed;
  16. int missed;
  17. unsigned long begin;
  18. unsigned long flags;
  19. };
  20. #define RATELIMIT_STATE_INIT(name, interval_init, burst_init) { \
  21. .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \
  22. .interval = interval_init, \
  23. .burst = burst_init, \
  24. }
  25. #define RATELIMIT_STATE_INIT_DISABLED \
  26. RATELIMIT_STATE_INIT(ratelimit_state, 0, DEFAULT_RATELIMIT_BURST)
  27. #define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \
  28. \
  29. struct ratelimit_state name = \
  30. RATELIMIT_STATE_INIT(name, interval_init, burst_init) \
  31. extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
  32. #define __ratelimit(state) ___ratelimit(state, __func__)
  33. #endif /* _LINUX_RATELIMIT_TYPES_H */