map_in_map_fd      32 samples/bpf/test_map_in_map_user.c static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key)
map_in_map_fd      41 samples/bpf/test_map_in_map_user.c 	ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id);