LXR linux/tools/testing/selftests/bpf/progs/bpf_iter_bpf_array

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2020 Facebook */
   3#include "bpf_iter.h"
   4#include <bpf/bpf_helpers.h>
   5#include <bpf/bpf_tracing.h>
   6
   7char _license[] SEC("license") = "GPL";
   8
   9struct key_t {
  10        int a;
  11        int b;
  12        int c;
  13};
  14
  15struct {
  16        __uint(type, BPF_MAP_TYPE_ARRAY);
  17        __uint(max_entries, 3);
  18        __type(key, __u32);
  19        __type(value, __u64);
  20} arraymap1 SEC(".maps");
  21
  22__u32 key_sum = 0;
  23__u64 val_sum = 0;
  24
  25SEC("iter/bpf_map_elem")
  26int dump_bpf_array_map(struct bpf_iter__bpf_map_elem *ctx)
  27{
  28        __u32 *key = ctx->key;
  29        __u64 *val = ctx->value;
  30
  31        if (key == (void *)0 || val == (void *)0)
  32                return 0;
  33
  34        bpf_seq_write(ctx->meta->seq, key, sizeof(__u32));
  35        bpf_seq_write(ctx->meta->seq, val, sizeof(__u64));
  36        key_sum += *key;
  37        val_sum += *val;
  38        *val = *key;
  39        return 0;
  40}
  41