netdev - Re: [PATCH net: fix /proc/net/dev regression

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Message-Id: <20120403.172548.2299885807875686272.davem@davemloft.net>
Date:	Tue, 03 Apr 2012 17:25:48 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	greearb@...delatech.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org,
	mmaruseac@...acom.com
Subject: Re: [PATCH net: fix /proc/net/dev regression

From: Ben Greear <greearb@...delatech.com>
Date: Tue, 03 Apr 2012 08:36:48 -0700

> On 04/03/2012 01:33 AM, Eric Dumazet wrote:
>> Commit f04565ddf52 (dev: use name hash for dev_seq_ops) added a second
>> regression, as some devices are missing from /proc/net/dev if many
>> devices are defined.
>>
>> When seq_file buffer is filled, the last ->next/show() method is
>> canceled (pos value is reverted to value prior ->next() call)
>>
>> Problem is after above commit, we dont restart the lookup at right
>> position in ->start() method.
>>
>> Fix this by removing the internal 'pos' pointer added in commit, since
>> we need to use the 'loff_t *pos' provided by seq_file layer.
>>
>> This also reverts commit 5cac98dd0 (net: Fix corruption
>> in /proc/*/net/dev_mcast), since its not needed anymore.
>>
>> Reported-by: Ben Greear<greearb@...delatech.com>
>> Signed-off-by: Eric Dumazet<eric.dumazet@...il.com>
>> Cc: Mihai Maruseac<mmaruseac@...acom.com>
> 
> This appears to fix the problem.  I do find it mildly irritating
> that the ordering is now random in /proc/net/dev, but I guess
> that is the price of progress.
> 
> Tested-by:  Ben Greear <greearb@...delatech.com>
> 
> Thanks for the quick fix!

Applied, and queued up for -stable, thanks everyone.
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