netfilter: xt_recent: add an entry reaper

[pandora-kernel.git] / net / netfilter / xt_RATEEST.c

diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c
index d80b819..87ae97e 100644 (file)
--- a/net/netfilter/xt_RATEEST.c
+++ b/net/netfilter/xt_RATEEST.c
@@ -23,6 +23,7 @@ static DEFINE_MUTEX(xt_rateest_mutex);
 #define RATEEST_HSIZE  16
 static struct hlist_head rateest_hash[RATEEST_HSIZE] __read_mostly;
 static unsigned int jhash_rnd __read_mostly;
+static bool rnd_inited __read_mostly;
 
 static unsigned int xt_rateest_hash(const char *name)
 {
@@ -93,6 +94,11 @@ static bool xt_rateest_tg_checkentry(const struct xt_tgchk_param *par)
                struct gnet_estimator   est;
        } cfg;
 
+       if (unlikely(!rnd_inited)) {
+               get_random_bytes(&jhash_rnd, sizeof(jhash_rnd));
+               rnd_inited = true;
+       }
+
        est = xt_rateest_lookup(info->name);
        if (est) {
                /*
@@ -164,7 +170,6 @@ static int __init xt_rateest_tg_init(void)
        for (i = 0; i < ARRAY_SIZE(rateest_hash); i++)
                INIT_HLIST_HEAD(&rateest_hash[i]);
 
-       get_random_bytes(&jhash_rnd, sizeof(jhash_rnd));
        return xt_register_target(&xt_rateest_tg_reg);
 }