XDP: Contents of XDP meta-data

Jesper Dangaard Brouer

What should be the content of the XDP meta-data structure?

I find the HW RX-hash very useful for DDoS filtering, and I would like
for it to survive until TX completion.

Do we need the (page-)offset and length when forwarding/TX'ing a XDP
packet? (E.g. a XDP-hook call could prepend a header, changing the
offset and length).

What about (HW) checksum states?

Do we (or HW) care about the input/ingress "port"?

What about offload feature flags?

Tom Herbert talked about making this both portable and extentable for
specific HW needs of the future... conflicting goals?

John Fastabend mentioned some approach that he might be able to share?

Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer

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