linux-kernel - Re: [PATCH net v3] gso: do not skip outer ip header in case of ipip and net

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Date:   Mon, 21 Feb 2022 11:50:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Tao Liu <thomas.liu@...oud.cn>
Cc:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        kuba@...nel.org, edumazet@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v3] gso: do not skip outer ip header in case of ipip and
 net_failover

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Fri, 18 Feb 2022 22:35:24 +0800 you wrote:
> We encounter a tcp drop issue in our cloud environment. Packet GROed in
> host forwards to a VM virtio_net nic with net_failover enabled. VM acts
> as a IPVS LB with ipip encapsulation. The full path like:
> host gro -> vm virtio_net rx -> net_failover rx -> ipvs fullnat
>  -> ipip encap -> net_failover tx -> virtio_net tx
> 
> When net_failover transmits a ipip pkt (gso_type = 0x0103, which means
> SKB_GSO_TCPV4, SKB_GSO_DODGY and SKB_GSO_IPXIP4), there is no gso
> did because it supports TSO and GSO_IPXIP4. But network_header points to
> inner ip header.
> 
> [...]

Here is the summary with links:
  - [net,v3] gso: do not skip outer ip header in case of ipip and net_failover
    https://git.kernel.org/netdev/net/c/cc20cced0598

You are awesome, thank you!
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