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 } 29