Re: [PATCH net] bareudp: set the inner protocol to the protocol of the packet

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Fri,  2 Oct 2026 23:30:39 +0800 you wrote:
> bareudp_xmit_skb() sets the inner protocol of the skb to the configured
> ethertype, and bareudp6_xmit_skb() does not set it at all. The inner
> protocol is used by skb_udp_tunnel_segment() to segment the inner packet
> when GSO has to be done in software, for instance when the lower device
> does not offload the checksum.
> 
> With multiproto, an IPv4 device also carries IPv6, so the IPv6 header
> is parsed as an IPv4 one. With IPv6 underlay, the inner protocol is
> whatever the skb had before. In both cases segmentation fails and the
> packets are dropped. With veth tx checksum offload disabled, iperf3 TCP
> over bareudp gets about 10 Mbit/s with thousands of retransmits instead
> of about 700 Mbit/s for IPv6 over IPv4 and for both families over IPv6,
> while IPv4 over IPv4 works.
> 
> [...]

Here is the summary with links:
  - [net] bareudp: set the inner protocol to the protocol of the packet
    https://git.kernel.org/netdev/net/c/c57b2e60d4bf

You are awesome, thank you!
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