diff options
Diffstat (limited to 'samples/bpf/xdp_redirect_kern.c')
| -rw-r--r-- | samples/bpf/xdp_redirect_kern.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/samples/bpf/xdp_redirect_kern.c b/samples/bpf/xdp_redirect_kern.c index a34ad457a684..1c90288d0203 100644 --- a/samples/bpf/xdp_redirect_kern.c +++ b/samples/bpf/xdp_redirect_kern.c @@ -26,6 +26,9 @@ struct bpf_map_def SEC("maps") tx_port = { .max_entries = 1, }; +/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success + * feedback. Redirect TX errors can be caught via a tracepoint. + */ struct bpf_map_def SEC("maps") rxcnt = { .type = BPF_MAP_TYPE_PERCPU_ARRAY, .key_size = sizeof(u32), @@ -33,7 +36,6 @@ struct bpf_map_def SEC("maps") rxcnt = { .max_entries = 1, }; - static void swap_src_dst_mac(void *data) { unsigned short *p = data; @@ -78,4 +80,11 @@ int xdp_redirect_prog(struct xdp_md *ctx) return bpf_redirect(*ifindex, 0); } +/* Redirect require an XDP bpf_prog loaded on the TX device */ +SEC("xdp_redirect_dummy") +int xdp_redirect_dummy(struct xdp_md *ctx) +{ + return XDP_PASS; +} + char _license[] SEC("license") = "GPL"; |