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 <[email protected]> Acked-by: Marcelo Ricardo Leitner <[email protected]> Signed-off-by: David S. Miller <[email protected]>
multipath-tcp · May 31, 2020 · 05aa69e · 05aa69e
1 parent 1b49cd7
commit 05aa69e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
@@ -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) {