net/sched: flow_dissector: Fix matching on zone id for invalid conns
If ct rejects a flow, it removes the conntrack info from the skb.
act_ct sets the post_ct variable so the dissector will see this case
as an +tracked +invalid state, but the zone id is lost with the
conntrack info.
To restore the zone id on such cases, set the last executed zone,
via the tc control block, when passing ct, and read it back in the
dissector if there is no ct info on the skb (invalid connection).
Fixes: 7baf2429a1a9 ("net/sched: cls_flower add CT_FLAGS_INVALID flag support")
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 9782b93..ef54ed3 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -311,6 +311,7 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
{
struct cls_fl_head *head = rcu_dereference_bh(tp->root);
bool post_ct = tc_skb_cb(skb)->post_ct;
+ u16 zone = tc_skb_cb(skb)->zone;
struct fl_flow_key skb_key;
struct fl_flow_mask *mask;
struct cls_fl_filter *f;
@@ -328,7 +329,7 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
fl_ct_info_to_flower_map,
ARRAY_SIZE(fl_ct_info_to_flower_map),
- post_ct);
+ post_ct, zone);
skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
skb_flow_dissect(skb, &mask->dissector, &skb_key,
FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP);