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netfilter: ipvs: don't check for presence of nat extension

Check for the NAT status bits, they are set once conntrack needs NAT in source or
reply direction, this is slightly faster than nfct_nat() as that has to check the
extension area.

Signed-off-by: Florian Westphal <fw@strlen.de>
This commit is contained in:
Florian Westphal 2017-03-28 10:31:20 +02:00 committed by Simon Horman
parent 592d42ac7f
commit 41390895e5

View File

@ -260,7 +260,7 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
buf_len = strlen(buf);
ct = nf_ct_get(skb, &ctinfo);
if (ct && !nf_ct_is_untracked(ct) && nfct_nat(ct)) {
if (ct && !nf_ct_is_untracked(ct) && (ct->status & IPS_NAT_MASK)) {
/* If mangling fails this function will return 0
* which will cause the packet to be dropped.
* Mangling can only fail under memory pressure,