/* Copyright (c) 2017 Facebook * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. */#ifndef __MAP_IN_MAP_H__#define __MAP_IN_MAP_H__ #include <linux/types.h> struct file;struct bpf_map; struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd);void bpf_map_meta_free(struct bpf_map *map_meta);bool bpf_map_meta_equal(const struct bpf_map *meta0,			const struct bpf_map *meta1);void *bpf_map_fd_get_ptr(struct bpf_map *map, struct file *map_file,			 int ufd);void bpf_map_fd_put_ptr(void *ptr);u32 bpf_map_fd_sys_lookup_elem(void *ptr); #endif