tools/testing/selftests/bpf/progs/test_sockmap_update.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2020 Cloudflare
   3 #include "vmlinux.h"
   4 #include <bpf/bpf_helpers.h>
   5
   6 struct {
   7         __uint(type, BPF_MAP_TYPE_SOCKMAP);
   8         __uint(max_entries, 1);
   9         __type(key, __u32);
  10         __type(value, __u64);
  11 } src SEC(".maps");
  12
  13 struct {
  14         __uint(type, BPF_MAP_TYPE_SOCKMAP);
  15         __uint(max_entries, 1);
  16         __type(key, __u32);
  17         __type(value, __u64);
  18 } dst_sock_map SEC(".maps");
  19
  20 struct {
  21         __uint(type, BPF_MAP_TYPE_SOCKHASH);
  22         __uint(max_entries, 1);
  23         __type(key, __u32);
  24         __type(value, __u64);
  25 } dst_sock_hash SEC(".maps");
  26
  27 SEC("classifier/copy_sock_map")
  28 int copy_sock_map(void *ctx)
  29 {
  30         struct bpf_sock *sk;
  31         bool failed = false;
  32         __u32 key = 0;
  33
  34         sk = bpf_map_lookup_elem(&src, &key);
  35         if (!sk)
  36                 return SK_DROP;
  37
  38         if (bpf_map_update_elem(&dst_sock_map, &key, sk, 0))
  39                 failed = true;
  40
  41         if (bpf_map_update_elem(&dst_sock_hash, &key, sk, 0))
  42                 failed = true;
  43
  44         bpf_sk_release(sk);
  45         return failed ? SK_DROP : SK_PASS;
  46 }
  47
  48 char _license[] SEC("license") = "GPL";