netdev - Re: [PATCH net] net: don't warn in inet diag when IPV6 is disabled

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Date:   Tue, 2 Jul 2019 15:14:22 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     David Miller <davem@...emloft.net>
Cc:     kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH net] net: don't warn in inet diag when IPV6 is disabled

On Tue, 02 Jul 2019 14:23:47 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> From: Stephen Hemminger <stephen@...workplumber.org>
> Date: Mon,  1 Jul 2019 08:23:03 -0700
> 
> > @@ -19,9 +19,11 @@ raw_get_hashinfo(const struct inet_diag_req_v2 *r)
> >  {
> >  	if (r->sdiag_family == AF_INET) {
> >  		return &raw_v4_hashinfo;
> > -#if IS_ENABLED(CONFIG_IPV6)
> >  	} else if (r->sdiag_family == AF_INET6) {
> > +#if IS_ENABLED(CONFIG_IPV6)
> >  		return &raw_v6_hashinfo;
> > +#else
> > +		return ERR_PTR(-EOPNOTSUPP);
> >  #endif
> >  	} else {
> >  		pr_warn_once("Unexpected inet family %d\n",  
> 
> Let's make some consistency in this area please.
> 
> The inet_diag code returns -EINVAL, and that's been that way forever.
> It also doesn't print a weird warning for unexpected sdiag_family
> values outside of AF_INET and AF_INET6.
> 
> That's been that way for so long that's probably the behavior to
> revolve everything around.
> 
> Therefore, please just get rid of the warning message instead of
> all of these other changes.
> 
> Thank you.

Sure, that makes sense.