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