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 }
28