netdev - [PATCH net-next V2 2/2] net/mlx5e: Offload TC matching on packets being IP fragments

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Date:   Tue,  6 Dec 2016 17:18:06 +0200
From:   Or Gerlitz <ogerlitz@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Jiri Pirko <jiri@...lanox.com>,
        Roi Dayan <roid@...lanox.com>,
        Hadar Har-Zion <hadarh@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH net-next V2 2/2] net/mlx5e: Offload TC matching on packets being IP fragments

Enable offloading of matching on packets being fragments.

Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
Reviewed-by: Paul Blakey <paulb@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index f07ef8c..f8829b5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -31,6 +31,7 @@
  */
 
 #include <net/flow_dissector.h>
+#include <net/sch_generic.h>
 #include <net/pkt_cls.h>
 #include <net/tc_act/tc_gact.h>
 #include <net/tc_act/tc_skbedit.h>
@@ -363,7 +364,18 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
 			skb_flow_dissector_target(f->dissector,
 						  FLOW_DISSECTOR_KEY_CONTROL,
 						  f->key);
+
+		struct flow_dissector_key_control *mask =
+			skb_flow_dissector_target(f->dissector,
+						  FLOW_DISSECTOR_KEY_CONTROL,
+						  f->mask);
 		addr_type = key->addr_type;
+
+		if (mask->flags & FLOW_DIS_IS_FRAGMENT) {
+			MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
+			MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,
+				 key->flags & FLOW_DIS_IS_FRAGMENT);
+		}
 	}
 
 	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
-- 
2.3.7