net: flow_offload: Add original direction flag to ct_metadata

Give offloading drivers the direction of the offloaded ct flow,
this will be used for matches on direction (ct_state +/-rpl).
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/flow_offload.h

@@ -245,6 +245,7 @@ struct flow_action_entry {
 			unsigned long cookie;
 			u32 mark;
 			u32 labels[4];
+			bool orig_dir;
 		} ct_metadata;
 		struct {				/* FLOW_ACTION_MPLS_PUSH */
 			u32		label;

net/sched/act_ct.c

@@ -183,6 +183,7 @@ static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct,
 					     IP_CT_ESTABLISHED_REPLY;
 	/* aligns with the CT reference on the SKB nf_ct_set */
 	entry->ct_metadata.cookie = (unsigned long)ct | ctinfo;
+	entry->ct_metadata.orig_dir = dir == IP_CT_DIR_ORIGINAL;
 
 	act_ct_labels = entry->ct_metadata.labels;
 	ct_labels = nf_ct_labels_find(ct);