| // SPDX-License-Identifier: GPL-2.0 |
| |
| #include <vmlinux.h> |
| #include <bpf/bpf_helpers.h> |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE); |
| __type(key, struct bpf_cgroup_storage_key); |
| __type(value, __u64); |
| } storage_map SEC(".maps"); |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_PROG_ARRAY); |
| __uint(max_entries, 1); |
| __uint(key_size, sizeof(__u32)); |
| __uint(value_size, sizeof(__u32)); |
| } prog_array SEC(".maps"); |
| |
| SEC("cgroup_skb/egress") |
| int prog_array_owner(struct __sk_buff *skb) |
| { |
| __u64 *storage; |
| |
| storage = bpf_get_local_storage(&storage_map, 0); |
| if (storage) |
| *storage = 1; |
| |
| bpf_tail_call(skb, &prog_array, 0); |
| return 1; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
