On Thu, 27 Jun 2019 12:14:50 +0100, Laatz, Kevin wrote: > On the application side (xdpsock), we don't have to worry about the user > defined headroom, since it is 0, so we only need to account for the > XDP_PACKET_HEADROOM when computing the original address (in the default > scenario).
That assumes specific layout for the data inside the buffer. Some NICs will prepend information like timestamp to the packet, meaning the packet would start at offset XDP_PACKET_HEADROOM + metadata len.. I think that's very limiting. What is the challenge in providing aligned addresses, exactly?
