On Mon, 3 Jun 2019 09:38:51 -0700 Jonathan Lemon <jonathan.le...@gmail.com> wrote:
> Currently, the AF_XDP code uses a separate map in order to > determine if an xsk is bound to a queue. Instead of doing this, > have bpf_map_lookup_elem() return the queue_id, as a way of > indicating that there is a valid entry at the map index. Just a reminder, that once we choose a return value, there the queue_id, then it basically becomes UAPI, and we cannot change it. Can we somehow use BTF to allow us to extend this later? I was also going to point out that, you cannot return a direct pointer to queue_id, as BPF-prog side can modify this... but Daniel already pointed this out. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
