RE: [PATCH v3 8/9] io_uring/cmd: BPF hook for getsockopt cmd

[David Laight]

...
> Not really, sock->ops->getsockopt() does not suport sockptr_t, but
> __user addresses, differently from setsockopt()
> 
...
>           int             (*getsockopt)(struct socket *sock, int level,
>                                         int optname, char __user *optval, int __user *optlen);
> 
> In order to be able to call sock->ops->getsockopt(), the callback
> function will need to accepted sockptr.

It is also worth looking at whether 'optlen' can be passed in
as a numeric parameter and then returned on success.
That would move the user copy into the syscall wrapper.

	David

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