From 30b0cf90c6dd82e7ebb3fcb5ba8447f1baeb80be Mon Sep 17 00:00:00 2001 From: Paul Blakey Date: Thu, 12 Mar 2020 12:23:07 +0200 Subject: net/sched: act_ct: Support restoring conntrack info on skbs Provide an API to restore the ct state pointer. This may be used by drivers to restore the ct state if they miss in tc chain after they already did the hardware connection tracking action (ct_metadata action). For example, consider the following rule on chain 0 that is in_hw, however chain 1 is not_in_hw: $ tc filter add dev ... chain 0 ... \ flower ... action ct pipe action goto chain 1 Packets of a flow offloaded (via nf flow table offload) by the driver hit this rule in hardware, will be marked with the ct metadata action (mark, label, zone) that does the equivalent of the software ct action, and when the packet jumps to hardware chain 1, there would be a miss. CT was already processed in hardware. Therefore, the driver's miss handling should restore the ct state on the skb, using the provided API, and continue the packet processing in chain 1. Signed-off-by: Paul Blakey Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller --- include/net/flow_offload.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/net/flow_offload.h') diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h index ba433497789b..a039c900c384 100644 --- a/include/net/flow_offload.h +++ b/include/net/flow_offload.h @@ -227,6 +227,7 @@ struct flow_action_entry { u16 zone; } ct; struct { + unsigned long cookie; u32 mark; u32 labels[4]; } ct_metadata; -- cgit v1.2.3