netdev - Re: [PATCH v2] ipv6: don't add link local route when there is no link local address

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Date:	Tue, 02 Oct 2012 22:38:41 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	nicolas.dichtel@...nd.com
Cc:	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH v2] ipv6: don't add link local route when there is no
 link local address

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Date: Tue,  2 Oct 2012 11:19:14 +0200

> When an address is added on loopback (ip -6 a a 2002::1/128 dev lo), a route
> to fe80::/64 is added in the main table:
>   unreachable fe80::/64 dev lo  proto kernel  metric 256  error -101
> 
> This route does not match any prefix (no fe80:: address on lo). In fact,
> addrconf_dev_config() will not add link local address because this function
> filters interfaces by type. If the link local address is added manually, the
> route to the link local prefix will be automatically added by
> addrconf_add_linklocal().
> Note also, that this route is not deleted when the address is removed.
> 
> After looking at the code, it seems that addrconf_add_lroute() is redundant with
> addrconf_add_linklocal(), because this function will add the link local route
> when the link local address is configured.
> 
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>

Applied.
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