RE: [PATCH v10 5/9] bpf: Add bpf_lookup_*_key() and bpf_key_put() kfuncs

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> From: Roberto Sassu [mailto:roberto.sassu@xxxxxxxxxx]
> Sent: Thursday, August 11, 2022 9:47 AM
> > From: Alexei Starovoitov [mailto:alexei.starovoitov@xxxxxxxxx]
> > Sent: Wednesday, August 10, 2022 11:34 PM
> > On Wed, Aug 10, 2022 at 06:59:28PM +0200, Roberto Sassu wrote:
> > > +
> > > +static int __init bpf_key_sig_kfuncs_init(void)
> > > +{
> > > +	int ret;
> > > +
> > > +	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING,
> > > +					&bpf_key_sig_kfunc_set);
> > > +	if (!ret)
> > > +		return 0;
> > > +
> > > +	return register_btf_kfunc_id_set(BPF_PROG_TYPE_LSM,
> > > +					 &bpf_key_sig_kfunc_set);
> >
> > Isn't this a watery water ?
> > Don't you have a patch 1 ?
> > What am I missing ?
> 
> Uhm, yes. I had doubts too. That was what also KP did.
> 
> It makes sense to register once, since we mapped LSM to
> TRACING.
> 
> Will resend only this patch. And I will figure out why CI failed.

Adding in CC Daniel Müller, which worked on this.

I think the issue is that some kernel options are set to =m.
This causes the CI to miss all kernel modules, since they are
not copied to the virtual machine that executes the tests.

I'm testing this patch:

https://github.com/robertosassu/libbpf-ci/commit/b665e001b58c4ddb792a2a68098ea5dc6936b15c

Roberto



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