源代码：

SEC("lsm/sb_mount")

int BPF_PROG(restricted_mount, const char *dev_name, const struct path *path, const char *type, unsigned long flags, void *data)

{

//this does work until now. according to testing ret must -1 and find must be true

int ret = -1;

bool find = true;

多次测试， 只有ret=-1 和 find=true ,程序才能正常运行，否则运行就会出错。

程序运行错误信息：

libbpf: prog 'restricted_mount': -- BEGIN PROG LOAD LOG --

arg#0 type is not a struct

Unrecognized arg#0 type PTR

; int BPF_PROG(restricted_mount, const char *dev_name, const struct path *path, const char *type, unsigned long flags, void *data)

0: (7b) *(u64 *)(r10 -416) = r1

; int BPF_PROG(restric

libbpf: prog 'restricted_mount': failed to load: -13