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Diffstat (limited to 'samples/bpf/xdp_sample.bpf.c')
-rw-r--r--samples/bpf/xdp_sample.bpf.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/samples/bpf/xdp_sample.bpf.c b/samples/bpf/xdp_sample.bpf.c
index e22f2a97a988..53ab5a972405 100644
--- a/samples/bpf/xdp_sample.bpf.c
+++ b/samples/bpf/xdp_sample.bpf.c
@@ -8,6 +8,7 @@
array_map rx_cnt SEC(".maps");
array_map redir_err_cnt SEC(".maps");
+array_map exception_cnt SEC(".maps");
const volatile int nr_cpus = 0;
@@ -110,3 +111,29 @@ int BPF_PROG(tp_xdp_redirect_map, const struct net_device *dev,
{
return xdp_redirect_collect_stat(dev->ifindex, err);
}
+
+SEC("tp_btf/xdp_exception")
+int BPF_PROG(tp_xdp_exception, const struct net_device *dev,
+ const struct bpf_prog *xdp, u32 act)
+{
+ u32 cpu = bpf_get_smp_processor_id();
+ struct datarec *rec;
+ u32 key = act, idx;
+
+ if (!IN_SET(from_match, dev->ifindex))
+ return 0;
+ if (!IN_SET(to_match, dev->ifindex))
+ return 0;
+
+ if (key > XDP_REDIRECT)
+ key = XDP_REDIRECT + 1;
+
+ idx = key * nr_cpus + cpu;
+ rec = bpf_map_lookup_elem(&exception_cnt, &idx);
+ if (!rec)
+ return 0;
+ NO_TEAR_INC(rec->dropped);
+
+ return 0;
+}
+