diff options
Diffstat (limited to 'net/core/utils.c')
| -rw-r--r-- | net/core/utils.c | 30 |
1 files changed, 2 insertions, 28 deletions
diff --git a/net/core/utils.c b/net/core/utils.c index 995f2b5168c2..8058d9c5e236 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -41,37 +41,11 @@ int net_msg_cost = 5*HZ; int net_msg_burst = 10; /* - * This enforces a rate limit: not more than one kernel message - * every 5secs to make a denial-of-service attack impossible. - * - * All warning printk()s should be guarded by this function. + * All net warning printk()s should be guarded by this function. */ int net_ratelimit(void) { - static spinlock_t ratelimit_lock = SPIN_LOCK_UNLOCKED; - static unsigned long toks = 10*5*HZ; - static unsigned long last_msg; - static int missed; - unsigned long flags; - unsigned long now = jiffies; - - spin_lock_irqsave(&ratelimit_lock, flags); - toks += now - last_msg; - last_msg = now; - if (toks > net_msg_burst) - toks = net_msg_burst; - if (toks >= net_msg_cost) { - int lost = missed; - missed = 0; - toks -= net_msg_cost; - spin_unlock_irqrestore(&ratelimit_lock, flags); - if (lost) - printk(KERN_WARNING "NET: %d messages suppressed.\n", lost); - return 1; - } - missed++; - spin_unlock_irqrestore(&ratelimit_lock, flags); - return 0; + return __printk_ratelimit(net_msg_cost, net_msg_burst); } EXPORT_SYMBOL(net_random); |