linux-kernel - Re: ip_set: protocol %u message -- useful?

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Date:	Thu, 13 Feb 2014 18:42:54 +0000
From:	Patrick McHardy <kaber@...sh.net>
To:	Cong Wang <cwang@...pensource.com>
Cc:	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
	Ilia Mirkin <imirkin@...m.mit.edu>,
	netdev <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Vitaly Lavrov <lve@...p.ru>
Subject: Re: ip_set: protocol %u message -- useful?

On Thu, Feb 13, 2014 at 10:32:45AM -0800, Cong Wang wrote:
> On Thu, Feb 13, 2014 at 2:30 AM, Jozsef Kadlecsik
> <kadlec@...ckhole.kfki.hu> wrote:
> > On Thu, 13 Feb 2014, Ilia Mirkin wrote:
> >> messages in my dmesg. This might be because of some local
> >> configuration changes I've made, or perhaps a kernel upgrade. Either
> >> way, it appears this message has been a pr_notice since the original
> >> code added it in a7b4f989a62 ("netfilter: ipset: IP set core
> >> support").
> >>
> >> Does this message provide a lot of value? Or could it be made into a pr_debug?
> >
> > That's a report message on the protocol version used by the ipset
> > subsystem. There was (and possibly will be) multiple protocols, so it
> > helps to catch basic userpsace/kernelspace communication issues.
> 
> But still it doesn't deserve a pr_notice()... pr_info() should be enough.

Maybe printing "using protocol version X" will make it appear less like
a debugging message referring to packet contents or something similar.

> diff --git a/net/netfilter/ipset/ip_set_core.c
> b/net/netfilter/ipset/ip_set_core.c
> index de770ec..5ea063f 100644
> --- a/net/netfilter/ipset/ip_set_core.c
> +++ b/net/netfilter/ipset/ip_set_core.c
> @@ -1945,7 +1945,7 @@ ip_set_net_init(struct net *net)
>                 return -ENOMEM;
>         inst->is_deleted = 0;
>         rcu_assign_pointer(inst->ip_set_list, list);
> -       pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL);
> +       pr_info("ip_set: protocol %u\n", IPSET_PROTOCOL);
>         return 0;
>  }
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