On Thu, Apr 08, 2021 at 02:51:01PM +0200, Lorenzo Bianconi wrote:
> From: Eelco Chaudron <echaudro@xxxxxxxxxx>
>
> This patch adds support for multi-buffer for the following helpers:
> - bpf_xdp_output()
> - bpf_perf_event_output()
>
> Signed-off-by: Eelco Chaudron <echaudro@xxxxxxxxxx>
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> ---
> diff --git a/tools/testing/selftests/bpf/progs/test_xdp_bpf2bpf.c b/tools/testing/selftests/bpf/progs/test_xdp_bpf2bpf.c
> index a038e827f850..d5a5f603d252 100644
> --- a/tools/testing/selftests/bpf/progs/test_xdp_bpf2bpf.c
> +++ b/tools/testing/selftests/bpf/progs/test_xdp_bpf2bpf.c
> @@ -27,6 +27,7 @@ struct xdp_buff {
> void *data_hard_start;
> unsigned long handle;
> struct xdp_rxq_info *rxq;
> + __u32 frame_length;
This patch will not work without patch 10, so could you change the order?
> } __attribute__((preserve_access_index));
>
> struct meta {
> @@ -49,7 +50,7 @@ int BPF_PROG(trace_on_entry, struct xdp_buff *xdp)
> void *data = (void *)(long)xdp->data;
>
> meta.ifindex = xdp->rxq->dev->ifindex;
> - meta.pkt_len = data_end - data;
> + meta.pkt_len = xdp->frame_length;
> bpf_xdp_output(xdp, &perf_buf_map,
> ((__u64) meta.pkt_len << 32) |
> BPF_F_CURRENT_CPU,
> --
> 2.30.2
>
