On Thu, 31 Jul 2025 23:18:12 +0200 Lorenzo Bianconi wrote:

IIUC the 'set' proposal (please correct me if I am wrong), the eBPF program
running on the NIC that is receiving the packet from the wire is supposed
to set (or update) the hw metadata info (e.g. RX HASH or RX checksum) in
the RX DMA descriptor associated to the packet to be successively consumed.
Am I right?

I was thinking of doing the SET on the veth side. Basically the
metadata has to be understood by the stack only at the xdp->skb
transition point. So we can delay the SET until that moment, carrying
the information in program-specific format.