netdev - Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is not successful

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Date:	Wed, 02 Jun 2010 17:32:34 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	netdev@...r.kernel.org, Stephen Hemminger <shemminger@...tta.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is
 not successful

Le mercredi 02 juin 2010 à 10:27 -0500, Christoph Lameter a écrit :

> Yes but they are not increment any counter. If packets are dropped because
> of the rp_filter setting interfering f.e. then the packets vanish without
> any accounting.
> 

But packets are vanishing either way.

> LINUX_MIB_INROUTEERRORS? Does it mean I can create a series of new
> counters that allow us to diagnose and distinguish all the different
> causes of packet loss? We would love to have that.
> 

For an example, you could take a look at commit 907cdda5205b
(tcp: Add SNMP counter for DEFER_ACCEPT)

Its pretty straigthforward, and wont conflict with monitoring apps.


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