[PATCH] net/af_xdp: add Rx metadata and dynamic timestamping support

[Stephen Hemminger]

On Tue, 23 Jun 2026 21:53:24 +0000
Mark Blasko <blasko at google.com> wrote:

> +		if (rxq->rx_timestamp_enabled &&
> +		    timestamp_dynfield_offset >= 0) {
> +			struct af_xdp_rx_metadata *meta;
> +
> +			meta = (struct af_xdp_rx_metadata *)
> +				((char *)rte_pktmbuf_mtod(bufs[i], void *) -
> +				 sizeof(struct af_xdp_rx_metadata));
> +			*RTE_MBUF_DYNFIELD(bufs[i],
> +					   timestamp_dynfield_offset,
> +					   uint64_t *) = meta->rx_timestamp;
> +			bufs[i]->ol_flags |= timestamp_dynflag;
> +		}
> +

Why does XDP time stamp need to be different than how other drivers
already do timestamps. See AF_PACKET and TAP device?

Should not be driver specific here.