On Fri, Dec 22, 2017 at 06:12:41PM +0100, Jesper Dangaard Brouer wrote: > Now all XDP driver have been updated to setup xdp_rxq_info and assign > this to xdp_buff->rxq. Thus, it is now safe to enable access to some > of the xdp_rxq_info struct members. > > This patch extend xdp_md and expose UAPI to userspace for > ingress_ifindex and rx_queue_index. Access happens via bpf > instruction rewrite, that load data directly from struct xdp_rxq_info. > > * ingress_ifindex map to xdp_rxq_info->dev->ifindex > * rx_queue_index map to xdp_rxq_info->queue_index > > Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com> ... > diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h > index 69eabfcb9bdb..a6000a95d40e 100644 > --- a/include/uapi/linux/bpf.h > +++ b/include/uapi/linux/bpf.h > @@ -899,6 +899,9 @@ struct xdp_md { > __u32 data; > __u32 data_end; > __u32 data_meta; > + /* Below access go though struct xdp_rxq_info */ > + __u32 ingress_ifindex; /* rxq->dev->ifindex */ > + __u32 rx_queue_index; /* rxq->queue_index */ > };
Acked-by: Alexei Starovoitov <a...@kernel.org> I think this is very useful extension and I hope driver maintainers will do a timely review of corresponding patches. my only nit: please use SPDX license header for two new files added in patch 14.