1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2020 Facebook */ 3 /* "undefine" structs in vmlinux.h, because we "override" them below */ 4 #define bpf_iter_meta bpf_iter_meta___not_used 5 #define bpf_iter__bpf_map bpf_iter__bpf_map___not_used 6 #include "vmlinux.h" 7 #undef bpf_iter_meta 8 #undef bpf_iter__bpf_map 9 #include <bpf/bpf_helpers.h> 10 #include <bpf/bpf_tracing.h> 11 12 char _license[] SEC("license") = "GPL"; 13 14 struct bpf_iter_meta { 15 struct seq_file *seq; 16 __u64 session_id; 17 __u64 seq_num; 18 } __attribute__((preserve_access_index)); 19 20 struct bpf_iter__bpf_map { 21 struct bpf_iter_meta *meta; 22 struct bpf_map *map; 23 } __attribute__((preserve_access_index)); 24 25 SEC("iter/bpf_map") 26 int dump_bpf_map(struct bpf_iter__bpf_map *ctx) 27 { 28 struct seq_file *seq = ctx->meta->seq; 29 __u64 seq_num = ctx->meta->seq_num; 30 struct bpf_map *map = ctx->map; 31 32 if (map == (void *)0) { 33 BPF_SEQ_PRINTF(seq, " %%%%%% END %%%%%%\n"); 34 return 0; 35 } 36 37 if (seq_num == 0) 38 BPF_SEQ_PRINTF(seq, " id refcnt usercnt locked_vm\n"); 39 40 BPF_SEQ_PRINTF(seq, "%8u %8ld %8ld %10lu\n", map->id, map->refcnt.counter, 41 map->usercnt.counter, 42 map->memory.user->locked_vm.counter); 43 return 0; 44 } 45