netdev - Re: [PATCH] neigh: Netlink notification for administrative NUD state change

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Date:	Tue, 17 Dec 2013 16:15:01 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	gilligan@...stanetworks.com
Cc:	nicolas.dichtel@...nd.com, netdev@...r.kernel.org
Subject: Re: [PATCH] neigh: Netlink notification for administrative NUD
 state change

From: Bob Gilligan <gilligan@...stanetworks.com>
Date: Sun, 15 Dec 2013 13:39:56 -0800

> 
> The neighbour code sends up an RTM_NEWNEIGH netlink notification if
> the NUD state of a neighbour cache entry is changed by a timer (e.g.
> from REACHABLE to STALE), even if the lladdr of the entry has not
> changed.
> 
> But an administrative change to the the NUD state of a neighbour cache
> entry that does not change the lladdr (e.g. via "ip -4 neigh change
> ...  nud ...") does not trigger a netlink notification.  This means
> that netlink listeners will not hear about administrative NUD state
> changes such as from a resolved state to PERMANENT.
> 
> This patch changes the neighbor code to generate an RTM_NEWNEIGH
> message when the NUD state of an entry is changed administratively.
> 
> Signed-off-by: Bob Gilligan <gilligan@...stanetworks.com>

Applied, thanks Bob.
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