netdev - Re: netlink_route kernel data dump size increased

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Message-ID: <CAM1L+iB-NsW8vC9QVyfa1rJWMu4gdT4u9NK5MJiipoeeWEhRzg@mail.gmail.com>
Date:	Wed, 26 Aug 2015 06:28:53 +0530
From:	tej parkash <parkash.tej@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: netlink_route kernel data dump size increased

On Thu, Aug 20, 2015 at 2:47 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Wed, 2015-08-19 at 23:41 +0530, tej parkash wrote:
>> All,
>>
>> We are running application on Linux Kernel 3.10 to collect network
>> interface information using  NETLINK_ROUTE protocol. earlier (kernel
>> 2.6.32) we were having 8K buffer allocated to collect all data but
>> with new kernel (3.10) we are seeing read socket error, as buffer size
>> is not sufficient for all network dump data.
>>
>> We want to understand that if the userspace buffer limit increased to
>> 16K or we need some other mechanism to collect the data in 8K chuck.
>> or Is there any other way application can use NETLINK_ROUTE  protocol,
>> so that it will not break the application if data size gets increased
>> in future.
>>
>> I did some some browsing and found some link but they were not very conclusive.
>> http://www.spinics.net/lists/netdev/msg162185.html
>>
>> Appreciate for any kind of help or pointers here
>>
>
> This sounds like a bug that might have been fixed later.
https://lists.ubuntu.com/archives/kernel-team/2014-August/046758.html

Is this the patch we are talking about?
It is available from 3.13 kernel only.  Let me also verify it, if it
is working for us.
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