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
 6char _license[] SEC("license") = "GPL";
 7
 8SEC("iter/bpf_link")
 9int 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}