80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_RATELIMIT_H
|
|
#define _LINUX_RATELIMIT_H
|
|
|
|
#include <linux/ratelimit_types.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
ratelimit_set_flags(struct ratelimit_state *rs, unsigned long flags)
|
|
{
|
|
rs->flags = flags;
|
|
}
|
|
|
|
extern struct ratelimit_state printk_ratelimit_state;
|
|
|
|
#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 */
|