~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/ratelimit.h

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.11 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.84 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.154 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.201 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.201 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.77 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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         raw_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           = __RAW_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         raw_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 #ifdef CONFIG_PRINTK
 45 
 46 #define WARN_ON_RATELIMIT(condition, state)                     \
 47                 WARN_ON((condition) && __ratelimit(state))
 48 
 49 #define WARN_RATELIMIT(condition, format, ...)                  \
 50 ({                                                              \
 51         static DEFINE_RATELIMIT_STATE(_rs,                      \
 52                                       DEFAULT_RATELIMIT_INTERVAL,       \
 53                                       DEFAULT_RATELIMIT_BURST); \
 54         int rtn = !!(condition);                                \
 55                                                                 \
 56         if (unlikely(rtn && __ratelimit(&_rs)))                 \
 57                 WARN(rtn, format, ##__VA_ARGS__);               \
 58                                                                 \
 59         rtn;                                                    \
 60 })
 61 
 62 #else
 63 
 64 #define WARN_ON_RATELIMIT(condition, state)                     \
 65         WARN_ON(condition)
 66 
 67 #define WARN_RATELIMIT(condition, format, ...)                  \
 68 ({                                                              \
 69         int rtn = WARN(condition, format, ##__VA_ARGS__);       \
 70         rtn;                                                    \
 71 })
 72 
 73 #endif
 74 
 75 #endif /* _LINUX_RATELIMIT_H */
 76 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp