path: root/net/sched
diff options
authorPaul Blakey <>2022-01-06 17:38:04 +0200
committerJakub Kicinski <>2022-01-09 16:24:12 -0800
commit6f022c2ddbcefaee79502ce5386dfe351d457070 (patch)
treed551a30d87db083573f66dfc2756ce22c818fbed /net/sched
parentf4bb93a82f94a1e23e532f0b4b1859f1f4605968 (diff)
net: openvswitch: Fix ct_state nat flags for conns arriving from tc
Netfilter conntrack maintains NAT flags per connection indicating whether NAT was configured for the connection. Openvswitch maintains NAT flags on the per packet flow key ct_state field, indicating whether NAT was actually executed on the packet. When a packet misses from tc to ovs the conntrack NAT flags are set. However, NAT was not necessarily executed on the packet because the connection's state might still be in NEW state. As such, openvswitch wrongly assumes that NAT was executed and sets an incorrect flow key NAT flags. Fix this, by flagging to openvswitch which NAT was actually done in act_ct via tc_skb_ext and tc_skb_cb to the openvswitch module, so the packet flow key NAT flags will be correctly set. Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct") Signed-off-by: Paul Blakey <> Acked-by: Jamal Hadi Salim <> Link: Signed-off-by: Jakub Kicinski <>
Diffstat (limited to 'net/sched')
2 files changed, 8 insertions, 0 deletions
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index ab3591408419..2a17eb77c904 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -839,6 +839,12 @@ static int ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
err = nf_nat_packet(ct, ctinfo, hooknum, skb);
+ if (err == NF_ACCEPT) {
+ if (maniptype == NF_NAT_MANIP_SRC)
+ tc_skb_cb(skb)->post_ct_snat = 1;
+ if (maniptype == NF_NAT_MANIP_DST)
+ tc_skb_cb(skb)->post_ct_dnat = 1;
+ }
return err;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 35c74bdde848..cc9409aa755e 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -1625,6 +1625,8 @@ int tcf_classify(struct sk_buff *skb,
ext->chain = last_executed_chain;
ext->mru = cb->mru;
ext->post_ct = cb->post_ct;
+ ext->post_ct_snat = cb->post_ct_snat;
+ ext->post_ct_dnat = cb->post_ct_dnat;
ext->zone = cb->zone;