netdev - Re: [PATCH iproute2] lib/bpf: Fix log level in verbose mode with libbpf

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Date:   Wed, 2 Feb 2022 22:07:05 +0100
From:   Paul Chaignon <paul@...valent.com>
To:     David Ahern <dsahern@...il.com>, netdev@...r.kernel.org
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        Hangbin Liu <haliu@...hat.com>
Subject: Re: [PATCH iproute2] lib/bpf: Fix log level in verbose mode with
 libbpf

On Wed, Feb 02, 2022 at 12:10:03PM -0700, David Ahern wrote:
> On 2/2/22 11:11 AM, Paul Chaignon wrote:
> > diff --git a/lib/bpf_libbpf.c b/lib/bpf_libbpf.c
> > index 50ef16bd..bb6399bf 100644
> > --- a/lib/bpf_libbpf.c
> > +++ b/lib/bpf_libbpf.c
> > @@ -305,7 +305,7 @@ static int load_bpf_object(struct bpf_cfg_in *cfg)
> >  
> >  	attr.obj = obj;
> >  	if (cfg->verbose)
> > -		attr.log_level = 2;
> > +		attr.log_level = 1;
> >  
> >  	ret = bpf_object__load_xattr(&attr);
> >  	if (ret)
> 
> ip and tc do not have verbosity flags, but there is show_details. Why
> not tie the log_level to that?

I'm not sure I understand what you're proposing. This code is referring
to the "verbose" parameter of the tc filter command, as in e.g.:

    tc filter replace dev eth0 ingress bpf da obj prog.o sec sec1 verbose

Are you proposing we replace that parameter with the existing -details
option?