From 02dd3291b2f095bbc88e1d2628fd5bf2e92de69b Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Wed, 3 Jan 2018 11:26:14 +0100 Subject: bpf: finally expose xdp_rxq_info to XDP bpf-programs 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 Acked-by: Alexei Starovoitov Acked-by: John Fastabend Signed-off-by: Alexei Starovoitov --- include/uapi/linux/bpf.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/uapi/linux/bpf.h') diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index f2f8b36e2ad4..405317f9c064 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 */ }; enum sk_action { -- cgit v1.2.3-55-g7522