1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/bpf.h> 3 #include <bpf/bpf_helpers.h> 4 5 struct { 6 __uint(type, BPF_MAP_TYPE_CPUMAP); 7 __type(key, __u32); 8 __type(value, struct bpf_cpumap_val); 9 __uint(max_entries, 1); 10 } cpu_map SEC(".maps"); 11 12 SEC("xdp/cpumap") 13 int xdp_drop_prog(struct xdp_md *ctx) 14 { 15 return XDP_DROP; 16 } 17 18 SEC("freplace") 19 int xdp_cpumap_prog(struct xdp_md *ctx) 20 { 21 return bpf_redirect_map(&cpu_map, 0, XDP_PASS); 22 } 23 24 char _license[] SEC("license") = "GPL"; 25