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 7 char _license[] SEC("license") = "GPL"; 8 9 struct { 10 __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); 11 __uint(max_entries, 3); 12 __type(key, __u32); 13 __type(value, __u32); 14 } arraymap1 SEC(".maps"); 15 16 /* will set before prog run */ 17 volatile const __u32 num_cpus = 0; 18 19 __u32 key_sum = 0, val_sum = 0; 20 21 SEC("iter/bpf_map_elem") dump_bpf_percpu_array_map(struct bpf_iter__bpf_map_elem * ctx)22int dump_bpf_percpu_array_map(struct bpf_iter__bpf_map_elem *ctx) 23 { 24 __u32 *key = ctx->key; 25 void *pptr = ctx->value; 26 __u32 step; 27 int i; 28 29 if (key == (void *)0 || pptr == (void *)0) 30 return 0; 31 32 key_sum += *key; 33 34 step = 8; 35 for (i = 0; i < num_cpus; i++) { 36 val_sum += *(__u32 *)pptr; 37 pptr += step; 38 } 39 return 0; 40 } 41