linux-kernel - Re: [PATCH] ipconfig.c: De-clutter IP configuration report

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Date:	Tue, 11 Sep 2007 09:11:11 +0100
From:	James Chapman <jchapman@...alix.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	"Maciej W. Rozycki" <macro@...ux-mips.org>, netdev@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipconfig.c: De-clutter IP configuration report

Jan Engelhardt wrote:
> On Sep 10 2007 13:09, Maciej W. Rozycki wrote:
>> The new code builds fine; no semantic changes.
>>
>> Please apply,
>>
>>  Maciej
>>
>> patch-mips-2.6.23-rc5-20070904-ipconfig-printk-2
>> diff -up --recursive --new-file linux-mips-2.6.23-rc5-20070904.macro/net/ipv4/ipconfig.c linux-mips-2.6.23-rc5-20070904/net/ipv4/ipconfig.c
>> --- linux-mips-2.6.23-rc5-20070904.macro/net/ipv4/ipconfig.c	2007-09-04 04:56:22.000000000 +0000
>> +++ linux-mips-2.6.23-rc5-20070904/net/ipv4/ipconfig.c	2007-09-10 11:53:19.000000000 +0000
>> @@ -1364,17 +1364,17 @@ static int __init ip_auto_config(void)
>> 	/*
>> 	 * Clue in the operator.
>> 	 */
>> -	printk("IP-Config: Complete:");
>> -	printk("\n      device=%s", ic_dev->name);
>> -	printk(", addr=%u.%u.%u.%u", NIPQUAD(ic_myaddr));
>> -	printk(", mask=%u.%u.%u.%u", NIPQUAD(ic_netmask));
>> -	printk(", gw=%u.%u.%u.%u", NIPQUAD(ic_gateway));
>> -	printk(",\n     host=%s, domain=%s, nis-domain=%s",
>> -	       utsname()->nodename, ic_domain, utsname()->domainname);
>> -	printk(",\n     bootserver=%u.%u.%u.%u", NIPQUAD(ic_servaddr));
>> -	printk(", rootserver=%u.%u.%u.%u", NIPQUAD(root_server_addr));
>> -	printk(", rootpath=%s", root_server_path);
>> -	printk("\n");
>> +	pr_info("IP-Config: Complete:\n");
>> +	pr_info("      device=%s, addr=%u.%u.%u.%u, "
>> +		"mask=%u.%u.%u.%u, gw=%u.%u.%u.%u,\n",
>> +		ic_dev->name, NIPQUAD(ic_myaddr),
>> +		NIPQUAD(ic_netmask), NIPQUAD(ic_gateway));
>> +	pr_info("      host=%s, domain=%s, nis-domain=%s,\n",
>> +		utsname()->nodename, ic_domain, utsname()->domainname);
>> +	pr_info("      bootserver=%u.%u.%u.%u, "
>> +		"rootserver=%u.%u.%u.%u, rootpath=%s\n",
>> +		NIPQUAD(ic_servaddr),
>> +		NIPQUAD(root_server_addr), root_server_path);
>> #endif /* !SILENT */
>>
>> 	return 0;
> 
> It should really be done in userspace. And ripped from the kernel.

The output is useful when debugging boot problems on systems whose 
rootfs is on the network. So I think the patch is ok.

However, it would be useful to make the parameters available to 
userspace for use by boot scripts etc. A proc file listing variables and 
values in /bin/sh syntax would be easy to use. I've been meaning to do 
this for ages so I'll roll a patch.

-- 
James Chapman
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development

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