Re: Re: lsm_cgroup.c selftest fails to compile when CONFIG_PACKET!=y

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On Fri, Jan 19, 2024 at 7:00 AM Vincent Li <vincent.mc.li@xxxxxxxxx> wrote:
>
> On Fri, Jan 19, 2024 at 4:23 AM Eduard Zingerman <eddyz87@xxxxxxxxx> wrote:
> >
> > On Fri, 2024-01-19 at 16:04 +0800, Shung-Hsi Yu wrote:
> >
> > [...]
> >
> > > Final goal would be have BPF selftests compiled and test against our own
> > > kernel, without having to come up with a specific kernel flavor that is
> > > used to build and run the selftest. For v5.14 and v5.19-based kernel it
> > > works: compilation is successful and I was able to run the verifier
> > > tests. (Did not try running the other tests though)
> >
> > You mean ./test_verifier binary, right?
> > A lot of tests had been moved from ./test_verifier to ./test_progs since.
> >
> > > > As far as I understand, selftests are supposed to be built and run
> > > > using specific configuration, here is how config for x86 CI is prepared:
> > > >
> > > > ./scripts/kconfig/merge_config.sh \
> > > >          ./tools/testing/selftests/bpf/config \
> > > >          ./tools/testing/selftests/bpf/config.vm \
> > > >          ./tools/testing/selftests/bpf/config.x86_64
> > > >
> > > > (root is kernel source).
> > > > I'm not sure if other configurations are supposed to be supported.
> > >
> > > Would it make sense to have makefile target that builds/runs a smaller
> > > subset of general, config-agnostic selftests that tests the core feature
> > > (e.g. verifier + instruction set)?
> >
> > In ideal world I'd say that ./test_progs should include/exclude tests
> > conditioned on current configuration, but I don't know how much work
> > would it be to adapt build system for this.
> >
>
> I would also suggest skipping building the specific bpf test code when
> a specific CONFIG is removed, sometimes
> I only want to test some bpf selftests code I am interested in :)

I don't think we should be complicating bpf selftests to test
configurations with reduced kconfig.
bpf/config.* is what we target in bpf CI and we expect
developers do the same amount of testing before they send patches.





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