[Intel-wired-lan] [next PATCH S13 14/15] i40e: fix ip-ip GRE encapulation

Nelson, Shannon shannon.nelson at intel.com
Thu Sep 10 21:53:26 UTC 2015

> From: Jesse Gross [mailto:jesse at nicira.com]
> Sent: Wednesday, September 09, 2015 11:02 PM

Thanks, Jesse, for your perseverance.

> >> To make a long story short, it looks like the actual problem here is
> >> that only UDP tunnels are supported (since that is all that is
> checked
> >> in i40e_tx_enable_csum()). In that case, I think you could simply do:
> >>
> >> if ((protocol != IPPROTO_UDP))
> >>     return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);

Ah, now I see that the GRE support patch for i40e_tx_enable_csum() hasn't been pushed out yet.  This explains some of this discussion.  Okay - for the moment we're dropping this patch, to be reworked when the other patch gets pushed.

I think you're right about simply dropping the use of vxlan_features_check() as it is too specific for our needs.  This will be part of the rework.


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