From e447056147effae1f77854986b5782bb22d77f62 Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree.xilinx@gmail.com>
Date: Mon, 2 Oct 2023 16:44:44 +0100
Subject: sfc: support TC rules which require OR-AR-CT-AR flow
When a foreign LHS rule (TC rule from a tunnel netdev which requests
conntrack lookup) matches on inner headers or enc_key_id, these matches
cannot be performed by the Outer Rule table, as the keys are only
available after the tunnel type has been identified (by the OR lookup)
and the rest of the headers parsed accordingly.
Offload such rules with an Action Rule, using the LOOKUP_CONTROL section
of the AR response to specify the conntrack and/or recirculation actions,
combined with an Outer Rule which performs only the usual Encap Match
duties.
This processing flow, as it requires two AR lookups per packet, is less
performant than OR-CT-AR, so only use it where necessary.
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/sfc/tc.h | 1 +
1 file changed, 1 insertion(+)
(limited to 'drivers/net/ethernet/sfc/tc.h')
diff --git a/drivers/net/ethernet/sfc/tc.h b/drivers/net/ethernet/sfc/tc.h
index c4cb52dda057..86e38ea7988c 100644
--- a/drivers/net/ethernet/sfc/tc.h
+++ b/drivers/net/ethernet/sfc/tc.h
@@ -208,6 +208,7 @@ struct efx_tc_lhs_rule {
struct efx_tc_lhs_action lhs_act;
struct rhash_head linkage;
u32 fw_id;
+ bool is_ar; /* Action Rule (for OR-AR-CT-AR sequence) */
};
enum efx_tc_rule_prios {
--
cgit