linux-kernel - RE: [PATCH v10 5/9] bpf: Add bpf_lookup_*_key() and bpf_key

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Message-ID: <2415f4931a364541b2e6d14a8185ffbb@huawei.com>
Date:   Thu, 11 Aug 2022 07:46:53 +0000
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
CC:     "ast@...nel.org" <ast@...nel.org>,
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Subject: RE: [PATCH v10 5/9] bpf: Add bpf_lookup_*_key() and bpf_key_put()
 kfuncs

> From: Alexei Starovoitov [mailto:alexei.starovoitov@...il.com]
> 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.

Roberto