[PATCH] net/mlx5: fix IPIP tunnel verification

[Raslan Darawsheh]

Hi,

From: Gregory Etelson <getelson at nvidia.com>
Sent: Monday, March 10, 2025 1:19 PM
To: dev at dpdk.org
Cc: Gregory Etelson; Maayan Kashani; Raslan Darawsheh; stable at dpdk.org; Dariusz Sosnowski; Slava Ovsiienko; Bing Zhao; Ori Kam; Suanming Mou; Matan Azrad
Subject: [PATCH] net/mlx5: fix IPIP tunnel verification

Assuming a case with the following pattern:

eth / ipv4 / udp / vxlan / eth / ipv4 proto is (IPv4 | IPv6)

MLX5 PMD incorrectly recognized this as a packet encapsulated as
VXLAN and IP in IP at the same packet header level.
This caused a flow validation error.

This patch fixes the inner IP in IP detection logic.

Fixes: 2db234e769e1 ("net/mlx5: fix IP-in-IP tunnels recognition")

Cc: stable at dpdk.org

Signed-off-by: Gregory Etelson <getelson at nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh