[dpdk-dev] [PATCH] net/mlx5: fix TPID check for VLAN push action on E-Switch

[Viacheslav Ovsiienko <viacheslavo@mellanox.com>]

The VLAN push action on E-Switch supports only 802.1Q (0x8100)
and 802.1AD (0x88A8) Tag Protocol ID (TPID) insertions. The
parameter check for RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN action
is added.

Fixes: 57123c00c1b8 ("net/mlx5: add Linux TC flower driver for E-Switch flow")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_tcf.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_flow_tcf.c b/drivers/net/mlx5/mlx5_flow_tcf.c
index 2f6b7d6..22a866d 100644
--- a/drivers/net/mlx5/mlx5_flow_tcf.c
+++ b/drivers/net/mlx5/mlx5_flow_tcf.c
@@ -1887,9 +1887,23 @@ struct pedit_parser {
 		case RTE_FLOW_ACTION_TYPE_OF_POP_VLAN:
 			current_action_flag = MLX5_FLOW_ACTION_OF_POP_VLAN;
 			break;
-		case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
+		case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN: {
+			rte_be16_t ethertype;
+
 			current_action_flag = MLX5_FLOW_ACTION_OF_PUSH_VLAN;
+			if (!actions->conf)
+				break;
+			conf.of_push_vlan = actions->conf;
+			ethertype = conf.of_push_vlan->ethertype;
+			if (ethertype != RTE_BE16(ETH_P_8021Q) &&
+			    ethertype != RTE_BE16(ETH_P_8021AD))
+				return rte_flow_error_set
+					(error, EINVAL,
+					 RTE_FLOW_ERROR_TYPE_ACTION, actions,
+					 "vlan push TPID must be "
+					 "802.1Q or 802.1AD");
 			break;
+		}
 		case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
 			if (!(action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN))
 				return rte_flow_error_set
-- 
1.8.3.1