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

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2020 Facebook */
   3#include "bpf_iter.h"
   4#include <bpf/bpf_helpers.h>
   5
   6char _license[] SEC("license") = "GPL";
   7
   8SEC("iter/bpf_map")
   9int dump_bpf_map(struct bpf_iter__bpf_map *ctx)
  10{
  11        struct seq_file *seq = ctx->meta->seq;
  12        __u64 seq_num = ctx->meta->seq_num;
  13        struct bpf_map *map = ctx->map;
  14
  15        if (map == (void *)0) {
  16                BPF_SEQ_PRINTF(seq, "      %%%%%% END %%%%%%\n");
  17                return 0;
  18        }
  19
  20        if (seq_num == 0)
  21                BPF_SEQ_PRINTF(seq, "      id   refcnt  usercnt  locked_vm\n");
  22
  23        BPF_SEQ_PRINTF(seq, "%8u %8ld %8ld %10lu\n", map->id, map->refcnt.counter,
  24                       map->usercnt.counter,
  25                       0LLU);
  26        return 0;
  27}
  28