[dpdk-stable] [dpdk-dev] [PATCH v1] net/mlx5: fix RSS expansion for L2/L3 VXLAN

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Lior Margalit
> Sent: Thursday, October 14, 2021 9:22 AM
> To: Matan Azrad <matan at nvidia.com>
> Cc: Lior Margalit <lmargalit at nvidia.com>; dev at dpdk.org; stable at dpdk.org
> Subject: [dpdk-dev] [PATCH v1] net/mlx5: fix RSS expansion for L2/L3 VXLAN
> 
> The RSS expansion algorithm is using a graph to find the possible expansion
> paths. The current implementation does not differentiate between standard
> (L2) VXLAN and L3 VXLAN. As result the flow is expanded with all possible
> paths.
> For example:
> testpmd> flow create... / vxlan / end actions rss level 2 / end
> It is currently expanded to the following paths:
> ETH IPV4 UDP VXLAN END
> ETH IPV4 UDP VXLAN ETH IPV4 END
> ETH IPV4 UDP VXLAN ETH IPV6 END
> ETH IPV4 UDP VXLAN IPV4 END
> ETH IPV4 UDP VXLAN IPV6 END
> 
> The fix is to adjust the expansion according to the outer UDP destination
> port. In case flow pattern defines a match on the standard udp port, 4789, or
> does not define a match on the destination port, which also implies setting
> the standard one, the expansion for the above example will be:
> ETH IPV4 UDP VXLAN END
> ETH IPV4 UDP VXLAN ETH IPV4 END
> ETH IPV4 UDP VXLAN ETH IPV6 END
> Otherwise, the expansion will be:
> ETH IPV4 UDP VXLAN END
> ETH IPV4 UDP VXLAN IPV4 END
> ETH IPV4 UDP VXLAN IPV6 END
> 
> Fixes: f4f06e361516 ("net/mlx5: add flow VXLAN item")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Lior Margalit <lmargalit at nvidia.com>
> Acked-by: Matan Azrad <matan at nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh