Some questions about attach_lsm

I would like to know how to use the attach_lsm and detach_lsm methods, what should be passed as the "fn_name" parameter, and whether it is possible to pass the kernel call as event and the custom trace function name as fn_name, just like attach_kprobe.

Start by reading the existing attach_lsm and detach_lsm API documentation or source, then compare their parameters and behavior with attach_kprobe. Document what fn_name and the event argument represent, including whether a kernel call and custom trace function can be combined; done means these usage questions are answered clearly.

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