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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2022 Red Hat, Inc. */
   3 #include <vmlinux.h>
   4 #include <bpf/bpf_helpers.h>
   5
   6 char _license[] SEC("license") = "GPL";
   7
   8 SEC("iter/bpf_link")
   9 int dump_bpf_link(struct bpf_iter__bpf_link *ctx)
  10 {
  11         struct seq_file *seq = ctx->meta->seq;
  12         struct bpf_link *link = ctx->link;
  13         int link_id;
  14
  15         if (!link)
  16                 return 0;
  17
  18         link_id = link->id;
  19         bpf_seq_write(seq, &link_id, sizeof(link_id));
  20         return 0;
  21 }