tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2020 Facebook */
   3 #include "bpf_iter.h"
   4 #include <bpf/bpf_helpers.h>
   5
   6 char _license[] SEC("license") = "GPL";
   7
   8 SEC("iter/bpf_map")
   9 int 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 }