On 18/08/02 (木) 20:45, Jesper Dangaard Brouer wrote:
On Thu, 2 Aug 2018 19:55:09 +0900
Toshiaki Makita <makita.toshi...@lab.ntt.co.jp> wrote:
+ headroom = frame->data - delta - (void *)frame;
Your calculation of headroom is still adding an assumption that
xdp_frame is located in the top of data area, that is unnecessary.
The headroom can be calculated as:
headroom = sizeof(struct xdp_frame) + frame->headroom - delta;
Thanks. But I'm not sure I get what you are requesting.
Supposing xdp_frame is not located in the top of data area, what ensures
that additional sizeof(struct xdp_frame) can be used?
Toshiaki Makita
