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netfilter: nf_conntrack: extend with extra stat counter

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I suspect an unfortunatly series of events occuring under a DDoS
attack, in function __nf_conntrack_find() nf_contrack_core.c.

Adding a stats counter to see if the search is restarted too often.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Jesper Dangaard Brouer
2010-04-23 12:34:56 +02:00
committed by Patrick McHardy
parent cecc74de25
commit af740b2c8f
4 changed files with 12 additions and 7 deletions
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include/linux/netfilter/nf_conntrack_common.h
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@ -113,6 +113,7 @@ struct ip_conntrack_stat {
unsigned int expect_new;
unsigned int expect_create;
unsigned int expect_delete;
unsigned int search_restart;
};
/* call to create an explicit dependency on nf_conntrack. */