Re: [PATCH bpf-next] bpf: add a new bpf argument type ARG_CONST_MAP_PTR_OR_NULL

[Hangbin Liu]

On Thu, Jul 16, 2020 at 12:28:16AM +0200, Daniel Borkmann wrote:
> > diff --git a/include/linux/bpf.h b/include/linux/bpf.h
> > index c67c88ad35f8..9d4dbef3c943 100644
> > --- a/include/linux/bpf.h
> > +++ b/include/linux/bpf.h
> > @@ -253,6 +253,7 @@ enum bpf_arg_type {
> >     ARG_PTR_TO_ALLOC_MEM,   /* pointer to dynamically allocated memory */
> >     ARG_PTR_TO_ALLOC_MEM_OR_NULL,   /* pointer to dynamically allocated 
> > memory or NULL */
> >     ARG_CONST_ALLOC_SIZE_OR_ZERO,   /* number of allocated bytes requested 
> > */
> > +   ARG_CONST_MAP_PTR_OR_NULL,      /* const argument used as pointer to 
> > bpf_map or NULL */
> >   };
> In combination with the set, this also needs test_verifier selftests in order 
> to
> exercise BPF insn snippets for the good & [expected] bad case.

Hi Daniel,

I just come up with a question, how should I test it without no bpf
helper using it? Should I wait until the XDP multicast patch set merged?

Thanks
Hangbin