bpf_iter_map_elem.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2
 3#include "vmlinux.h"
 4#include <bpf/bpf_tracing.h>
 5#include <bpf/bpf_helpers.h>
 6
 7char _license[] SEC("license") = "GPL";
 8
 9__u32 value_sum = 0;
10
11SEC("iter/bpf_map_elem")
12int dump_bpf_map_values(struct bpf_iter__bpf_map_elem *ctx)
13{
14	__u32 value = 0;
15
16	if (ctx->value == (void *)0)
17		return 0;
18
19	bpf_probe_read_kernel(&value, sizeof(value), ctx->value);
20	value_sum += value;
21	return 0;
22}