netdev - [net-next V2 10/15] net/mlx5e: Offload TC e-switch rules with egress VLAN device

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Message-Id: <20190405211719.14979-11-saeedm@mellanox.com>
Date:   Fri,  5 Apr 2019 14:17:14 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eli Britstein <elibr@...lanox.com>,
        Roi Dayan <roid@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next V2 10/15] net/mlx5e: Offload TC e-switch rules with egress VLAN device

From: Eli Britstein <elibr@...lanox.com>

Upon redirection to an uplink VLAN device, emulate vlan push actions
according to the VLAN properties of the VLAN device and redirect to
the uplink.

Signed-off-by: Eli Britstein <elibr@...lanox.com>
Reviewed-by: Roi Dayan <roid@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_tc.c   | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 611b636c603e..affa54d10a97 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2582,6 +2582,32 @@ static int parse_tc_vlan_action(struct mlx5e_priv *priv,
 	return 0;
 }
 
+static int add_vlan_push_action(struct mlx5e_priv *priv,
+				struct mlx5_esw_flow_attr *attr,
+				struct net_device **out_dev,
+				u32 *action)
+{
+	struct net_device *vlan_dev = *out_dev;
+	struct flow_action_entry vlan_act = {
+		.id = FLOW_ACTION_VLAN_PUSH,
+		.vlan.vid = vlan_dev_vlan_id(vlan_dev),
+		.vlan.proto = vlan_dev_vlan_proto(vlan_dev),
+		.vlan.prio = 0,
+	};
+	int err;
+
+	err = parse_tc_vlan_action(priv, &vlan_act, attr, action);
+	if (err)
+		return err;
+
+	*out_dev = dev_get_by_index_rcu(dev_net(vlan_dev),
+					dev_get_iflink(vlan_dev));
+	if (is_vlan_dev(*out_dev))
+		err = add_vlan_push_action(priv, attr, out_dev, action);
+
+	return err;
+}
+
 static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 				struct flow_action *flow_action,
 				struct mlx5e_tc_flow *flow,
@@ -2662,6 +2688,14 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 				    uplink_upper == out_dev)
 					out_dev = uplink_dev;
 
+				if (is_vlan_dev(out_dev)) {
+					err = add_vlan_push_action(priv, attr,
+								   &out_dev,
+								   &action);
+					if (err)
+						return err;
+				}
+
 				if (!mlx5e_eswitch_rep(out_dev))
 					return -EOPNOTSUPP;
 
-- 
2.20.1