On Tue, 8 Jul 2025 02:06:11 +0000 Song, Yoong Siang wrote: >> Why would the driver need to move it back? >> On XDP_PASS an skb is constructed, so the metadata should >> be transferred to the skb. There is no need to copy it back >> as a prepend. > > I said so because I thought need to put back the timestamp > as prepend and then point skb_shared_hwtstamps.netdev_data to it > to support the ndo_get_tstamp(). No need, the timestamps are set in shared info directly. There are multiple drivers which use the metadata prepend method, so I'm pretty sure it should work.
