net/mlx5e: Restore tunnel metadata on miss

In tunnel and chains setup, we decapsulate the packets on first chain hop,
if we miss on later chains, the packet will comes up without tunnel header,
so it won't be taken by the tunnel device automatically, which fills the
tunnel metadata, and further tc tunnel matches won't work.

On miss, we get the tunnel mapping id, which was set on the chain 0 rule
that decapsulated the packet. This rule matched the tunnel outer
headers. From the tunnel mapping id, we get to this tunnel matches
and restore the equivalent tunnel info metadata dst on the skb.
We also set the skb->dev to the relevant device (tunnel device).
Now further tc processing can be done on the relevant device.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
index 2fab76b0bec5..21cbde472b64 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
@@ -109,7 +109,14 @@ extern struct mlx5e_tc_attr_to_reg_mapping mlx5e_tc_attr_to_reg_mappings[];
 bool mlx5e_is_valid_eswitch_fwd_dev(struct mlx5e_priv *priv,
 				    struct net_device *out_dev);
 
-bool mlx5e_tc_rep_update_skb(struct mlx5_cqe64 *cqe, struct sk_buff *skb);
+struct mlx5e_tc_update_priv {
+	struct net_device *tun_dev;
+};
+
+bool mlx5e_tc_rep_update_skb(struct mlx5_cqe64 *cqe, struct sk_buff *skb,
+			     struct mlx5e_tc_update_priv *tc_priv);
+
+void mlx5_tc_rep_post_napi_receive(struct mlx5e_tc_update_priv *tc_priv);
 
 struct mlx5e_tc_mod_hdr_acts {
 	int num_actions;