From: Changli Gao <xiaosuo@gmail.com>
Date: Tue, 21 Sep 2010 15:49:20 +0000 (+0200)
Subject: netfilter: save the hash of the tuple in the original direction for latter use
X-Git-Tag: v2.6.37-rc1~147^2~3^2~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99f07e91bef34db0fc8b1a224096e97f02dc0d56;p=pandora-kernel.git

netfilter: save the hash of the tuple in the original direction for latter use

Since we don't change the tuple in the original direction, we can save it
in ct->tuplehash[IP_CT_DIR_REPLY].hnode.pprev for __nf_conntrack_confirm()
use.

__hash_conntrack() is split into two steps: hash_conntrack_raw() is used
to get the raw hash, and __hash_bucket() is used to get the bucket id.

In SYN-flood case, early_drop() doesn't need to recompute the hash again.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
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