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net/sched: act_ct: add nat mangle action only for NAT-conntrack 

Currently add nat mangle action with comparing invert and orig tuple.
It is better to check IPS_NAT_MASK flags first to avoid non necessary
memcmp for non-NAT conntrack.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
wenxu 2020-05-30 13:54:51 +08:00 committed by David S. Miller
parent 1b49cd71b5
commit 05aa69e5cb
1 changed files with 3 additions and 0 deletions
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3
net/sched/act_ct.c
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@ -199,6 +199,9 @@ static int tcf_ct_flow_table_add_action_nat(struct net *net,
const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
struct nf_conntrack_tuple target;
if (!(ct->status & IPS_NAT_MASK))
return 0;
nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple);
switch (tuple->src.l3num) {