[dpdk-dev] [PATCH 2/2] net/mlx5: fix missing RSS expansion of IPv6 frag

[Xiaoyu Min]

IPV6_FRAG_EXT item is missed for RSS expansion which causes flows like
[1] are wrongly expanded.

Different from other items, IPV6_FRAG_EXT hasn't next field because HW
only support to do hash of UDP/TCP for non-fragment.

This MLX5_EXPANSION_IPV6_FRAG_EXT node in RSS expansion graph only helps
RSS expansion function to locate right node in graph from which start
to expand.

Fixes: 0e5a0d8f7556 ("net/mlx5: support match on IPv6 fragment extension")
Cc: stable at dpdk.org

[1]:
flow create 0 ingress pattern eth / ipv6 / udp dst is 250 / vxlan-gpe /
ipv6 / ipv6_frag_ext / end actions rss level 2 types ip end / end

Signed-off-by: Xiaoyu Min <jackmin at nvidia.com>
---
 drivers/net/mlx5/mlx5_flow.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 1b682ac8ed..90b8cf6692 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -134,6 +134,7 @@ mlx5_flow_is_rss_expandable_item(const struct rte_flow_item *item)
 	case RTE_FLOW_ITEM_TYPE_MPLS:
 	case RTE_FLOW_ITEM_TYPE_VXLAN_GPE:
 	case RTE_FLOW_ITEM_TYPE_GRE_KEY:
+	case RTE_FLOW_ITEM_TYPE_IPV6_FRAG_EXT:
 		return true;
 	default:
 		break;
@@ -453,6 +454,7 @@ enum mlx5_expansion {
 	MLX5_EXPANSION_IPV6,
 	MLX5_EXPANSION_IPV6_UDP,
 	MLX5_EXPANSION_IPV6_TCP,
+	MLX5_EXPANSION_IPV6_FRAG_EXT,
 };
 
 /** Supported expansion of items. */
@@ -607,7 +609,8 @@ static const struct mlx5_flow_expand_node mlx5_support_expansion[] = {
 	},
 	[MLX5_EXPANSION_IPV6] = {
 		.next = MLX5_FLOW_EXPAND_RSS_NEXT(MLX5_EXPANSION_IPV6_UDP,
-						  MLX5_EXPANSION_IPV6_TCP),
+						  MLX5_EXPANSION_IPV6_TCP,
+						  MLX5_EXPANSION_IPV6_FRAG_EXT),
 		.type = RTE_FLOW_ITEM_TYPE_IPV6,
 		.rss_types = ETH_RSS_IPV6 | ETH_RSS_FRAG_IPV6 |
 			ETH_RSS_NONFRAG_IPV6_OTHER,
@@ -620,6 +623,9 @@ static const struct mlx5_flow_expand_node mlx5_support_expansion[] = {
 		.type = RTE_FLOW_ITEM_TYPE_TCP,
 		.rss_types = ETH_RSS_NONFRAG_IPV6_TCP,
 	},
+	[MLX5_EXPANSION_IPV6_FRAG_EXT] = {
+		.type = RTE_FLOW_ITEM_TYPE_IPV6_FRAG_EXT,
+	},
 };
 
 static struct rte_flow_action_handle *
-- 
2.32.0