Re: [PATCH] netfilter: conntrack: account packets drop by tcp_packet()

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On Monday 2009-02-23 11:15, Pablo Neira Ayuso wrote:
>diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
>index 8b9dbb7..4503727 100644
>--- a/net/netfilter/nf_conntrack_core.c
>+++ b/net/netfilter/nf_conntrack_core.c
>@@ -733,6 +733,8 @@ nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum,
> 		nf_conntrack_put(skb->nfct);
> 		skb->nfct = NULL;
> 		NF_CT_STAT_INC_ATOMIC(net, invalid);
>+		if (-ret == NF_DROP)
>+			NF_CT_STAT_INC_ATOMIC(net, drop);
> 		return -ret;
> 	}
> 

*boggle* Why not just "ret == -NF_DROP"?
The assumption would be near that "-NF_DROP" is a constant just
as "NF_DROP" would be, but "-ret" involves an extra instruction
for negating ret.

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