Re: [PATCH bpf-next v4 2/5] selftests/bpf: allow BTF specs and func infos in test_verifier tests

[Eduard Zingerman <eddyz87@gmail.com>]

> On Fri, 2022-06-10 at 11:09 -0700, Song Liu wrote:

> > +static int load_btf_for_test(struct bpf_test *test)
> > +{
> > +       int types_num = 0;
> > +
> > +       while (types_num < MAX_BTF_TYPES &&
> > +              test->btf_types[types_num] != BTF_END_RAW)
> > +               ++types_num;
> > +
> > +       int types_len = types_num * sizeof(test->btf_types[0]);
> > +
> > +       return load_btf_spec(test->btf_types, types_len,
> > +                            test->btf_strings, sizeof(test->btf_strings));
> 
> IIUC, strings_len is always 256. Is this expected?

Yes, as long as strings are zero terminated the actual buffer size
shouldn't matter. So I decided that it would be better to avoid
strings length specification in the test definition to keep things
simpler.

Thanks,
Eduard