// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include "bpf_iter.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char _license[] SEC("license") = "GPL";
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struct key_t {
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int a;
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int b;
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int c;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
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__uint(max_entries, 3);
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__type(key, struct key_t);
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__type(value, __u32);
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} hashmap1 SEC(".maps");
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/* will set before prog run */
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volatile const __u32 num_cpus = 0;
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/* will collect results during prog run */
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__u32 key_sum_a = 0, key_sum_b = 0, key_sum_c = 0;
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__u32 val_sum = 0;
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SEC("iter/bpf_map_elem")
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int dump_bpf_percpu_hash_map(struct bpf_iter__bpf_map_elem *ctx)
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{
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struct key_t *key = ctx->key;
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void *pptr = ctx->value;
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__u32 step;
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int i;
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if (key == (void *)0 || pptr == (void *)0)
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return 0;
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key_sum_a += key->a;
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key_sum_b += key->b;
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key_sum_c += key->c;
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step = 8;
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for (i = 0; i < num_cpus; i++) {
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val_sum += *(__u32 *)pptr;
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pptr += step;
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}
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return 0;
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}
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