netdev - Re: [PATCH net] ipv4: implement support for NOPREFIXROUTE ifa flag for ipv4 address

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Message-Id: <20151023.025520.942186208311911968.davem@davemloft.net>
Date:	Fri, 23 Oct 2015 02:55:20 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	pabeni@...hat.com
Cc:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net
Subject: Re: [PATCH net] ipv4: implement support for NOPREFIXROUTE ifa flag
 for ipv4 address

From: Paolo Abeni <pabeni@...hat.com>
Date: Tue, 20 Oct 2015 10:28:45 +0200

> Currently adding a new ipv4 address always cause the creation of the
> related network route, with default metric. When a host has multiple
> interfaces on the same network, multiple routes with the same metric
> are created.
> 
> If the userspace wants to set specific metric on each routes, i.e.
> giving better metric to ethernet links in respect to Wi-Fi ones,
> the network routes must be deleted and recreated, which is error-prone.
> 
> This patch implements the support for IFA_F_NOPREFIXROUTE for ipv4
> address. When an address is added with such flag set, no associated
> network route is created, no network route is deleted when
> said IP is gone and it's up to the user space manage such route.
> 
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied to net-next, thanks.
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