netdev - Re: [PATCH] Age Entry For IPv4 Route Table

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Message-ID: <467F75AD.1090004@linux.vnet.ibm.com>
Date:	Mon, 25 Jun 2007 13:28:37 +0530
From:	Varun Chandramohan <varunc@...ux.vnet.ibm.com>
To:	David Miller <davem@...emloft.net>
CC:	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org, sri@...ibm.com,
	dlstevens@...ibm.com, varuncha@...ibm.com
Subject: Re: [PATCH] Age Entry For IPv4 Route Table

David Miller wrote:
> From: Varun Chandramohan <varunc@...ux.vnet.ibm.com>
> Date: Mon, 25 Jun 2007 10:51:39 +0530
>
>   
>> YOSHIFUJI Hideaki / ������������ wrote:
>>     
>>> In article <20070625102838.9d1fee20.varunc@...ux.vnet.ibm.com> (at Mon, 25 Jun 2007 10:28:38 +0530), Varun Chandramohan <varunc@...ux.vnet.ibm.com> says:
>>>
>>>   
>>>       
>>>> According to the RFC 4292 (IP Forwarding Table MIB) there is a need for an age entry for all the routes in the routing table. The entry in the RFC is inetCidrRouteAge and oid is inetCidrRouteAge.1.10.
>>>> Many snmp application require this age entry. So iam adding the age field in the routing table and providing
>>>> the interface for this value via /proc/net/route.
>>>>     
>>>>         
>>> I'm not in favor of adding new field(s) to /proc/net/route.
>>>
>>>   
>>>       
>> Do you think it will break any user level functionality? I have tested
>> with netstat, route and net-snmp which reads from the same /proc
>> interface. They seem to work fine.
>>     
>
> You can't change procfs file output format, someone's shell scripts
> or whatever out there will break.  Just testing some common packages
> isn't a way to be able to change procfs file output, it's a user
> exported API and just like system calls you cannot change them.
>
>   
Hi Dave,
    
        Ok i understand. But can you suggest anyother way to do the above?

Regards,
Varun
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