netdev - Re: [PATCH] ipv6: don't call addrconf_dst

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Date:	Thu, 2 Jan 2014 17:08:15 +0800
From:	chenweilong <chenweilong@...wei.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
CC:	<netdev@...r.kernel.org>
Subject: Re: [PATCH] ipv6: don't call addrconf_dst_alloc again when enable
 lo

On 2014/1/2 16:32, Hannes Frederic Sowa wrote:
> On Thu, Jan 02, 2014 at 04:13:40PM +0800, chenweilong wrote:
>> Can you give more explanation about this please?
> 
> If you look at the routing table for local addresses (ip -6 route list table
> local), you see that every address which is RTF_LOCAL (and thus passes up the
> packets via ip6_input) has as its device the loopback device.
> 
> In case you shutdown loopback you clear all those routes, thus incoming
> packets won't find the corresponding rt6_info which directs the packets to
> passed up the stack.
> 
> I guess it was done to satisfy the scoped architecture of IPv6.
> 
> Does this help you?
> 
> 
> 
Yes,thanks very much!


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