Release 4.15 include/linux/ratelimit.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_RATELIMIT_H
#define _LINUX_RATELIMIT_H
#include <linux/param.h>
#include <linux/sched.h>
#include <linux/spinlock.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(name, interval_init, burst_init) { \
.lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \
.interval = interval_init, \
.burst = burst_init, \
}
#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) \
static inline void ratelimit_state_init(struct ratelimit_state *rs,
int interval, int burst)
{
memset(rs, 0, sizeof(*rs));
raw_spin_lock_init(&rs->lock);
rs->interval = interval;
rs->burst = burst;
}
static inline void ratelimit_default_init(struct ratelimit_state *rs)
{
return ratelimit_state_init(rs, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static inline void ratelimit_state_exit(struct ratelimit_state *rs)
{
if (!(rs->flags & RATELIMIT_MSG_ON_RELEASE))
return;
if (rs->missed) {
pr_warn("%s: %d output lines suppressed due to ratelimiting\n",
current->comm, rs->missed);
rs->missed = 0;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 42 | 82.35% | 1 | 50.00% |
| Hirofumi Ogawa | 9 | 17.65% | 1 | 50.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
static inline void
ratelimit_set_flags(struct ratelimit_state *rs, unsigned long flags)
{
rs->flags = flags;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 17 | 77.27% | 1 | 50.00% |
| Hirofumi Ogawa | 5 | 22.73% | 1 | 50.00% |
| Total | 22 | 100.00% | 2 | 100.00% |
extern struct ratelimit_state printk_ratelimit_state;
extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
#define __ratelimit(state) ___ratelimit(state, __func__)
#ifdef CONFIG_PRINTK
#define WARN_ON_RATELIMIT(condition, state) ({ \
bool __rtn_cond = !!(condition); \
WARN_ON(__rtn_cond && __ratelimit(state)); \
__rtn_cond; \
})
#define WARN_RATELIMIT(condition, format, ...) \
({ \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
int rtn = !!(condition); \
\
if (unlikely(rtn && __ratelimit(&_rs))) \
WARN(rtn, format, ##__VA_ARGS__); \
\
rtn; \
})
#else
#define WARN_ON_RATELIMIT(condition, state) \
WARN_ON(condition)
#define WARN_RATELIMIT(condition, format, ...) \
({ \
int rtn = WARN(condition, format, ##__VA_ARGS__); \
rtn; \
})
#endif
#endif /* _LINUX_RATELIMIT_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 107 | 35.43% | 1 | 8.33% |
| Dave Young | 57 | 18.87% | 1 | 8.33% |
| David S. Miller | 45 | 14.90% | 1 | 8.33% |
| Hirofumi Ogawa | 39 | 12.91% | 1 | 8.33% |
| Dmitriy Monakhov | 19 | 6.29% | 1 | 8.33% |
| Christian Bornträger | 13 | 4.30% | 1 | 8.33% |
| Ingo Molnar | 9 | 2.98% | 1 | 8.33% |
| Namhyung Kim | 5 | 1.66% | 1 | 8.33% |
| Markus Trippelsdorf | 4 | 1.32% | 1 | 8.33% |
| Thomas Gleixner | 2 | 0.66% | 1 | 8.33% |
| Jiri Slaby | 1 | 0.33% | 1 | 8.33% |
| Greg Kroah-Hartman | 1 | 0.33% | 1 | 8.33% |
| Total | 302 | 100.00% | 12 | 100.00% |
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