[PATCH net-next v2 5/5] net/mlx5e: Return -EOPNOTSUPP when attempting to offload an unsupported action

[xiangxia.m.yue@gmail.com]

From: Tonghao Zhang <xiangxia.m.yue@gmail.com>

The encapsulation is not supported for mlx5 VFs. When we try to
offload that action, the -EINVAL is returned, but not -EOPNOTSUPP.
This patch changes the returned value and ignore to confuse user.

For example: (p2p1_0 is VF net device)
tc filter add dev p2p1_0 protocol ip  parent ffff: prio 1 flower skip_sw \
	src_mac e4:11:22:33:44:01	\
	action tunnel_key set		\
	src_ip 1.1.1.100		\
	dst_ip 1.1.1.200		\
	dst_port 4789 id 100		\
	action mirred egress redirect dev vxlan0

"RTNETLINK answers: Invalid argument"

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index d9fcb14..f5029ea 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2302,7 +2302,8 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv,
 			}
 			break;
 		default:
-			return -EINVAL;
+			NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported");
+			return -EOPNOTSUPP;
 		}
 	}
 
@@ -2624,7 +2625,8 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 			break;
 			}
 		default:
-			return -EINVAL;
+			NL_SET_ERR_MSG_MOD(extack, "The offload action is not supported");
+			return -EOPNOTSUPP;
 		}
 	}
 
-- 
1.8.3.1