bpf/progs/bpf_iter_bpf_map.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (c) 2020 Facebook */
0003 #include "bpf_iter.h"
0004 #include <bpf/bpf_helpers.h>
0005
0006 char _license[] SEC("license") = "GPL";
0007
0008 SEC("iter/bpf_map")
0009 int dump_bpf_map(struct bpf_iter__bpf_map *ctx)
0010 {
0011     struct seq_file *seq = ctx->meta->seq;
0012     __u64 seq_num = ctx->meta->seq_num;
0013     struct bpf_map *map = ctx->map;
0014
0015     if (map == (void *)0) {
0016         BPF_SEQ_PRINTF(seq, "      %%%%%% END %%%%%%\n");
0017         return 0;
0018     }
0019
0020     if (seq_num == 0)
0021         BPF_SEQ_PRINTF(seq, "      id   refcnt  usercnt  locked_vm\n");
0022
0023     BPF_SEQ_PRINTF(seq, "%8u %8ld %8ld %10lu\n", map->id, map->refcnt.counter,
0024                map->usercnt.counter,
0025                0LLU);
0026     return 0;
0027 }