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

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Message-ID: <52AEB88E.2040004@6wind.com>
Date:	Mon, 16 Dec 2013 09:23:42 +0100
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	Bob Gilligan <gilligan@...stanetworks.com>, davem@...emloft.net
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH] neigh: Netlink notification for administrative NUD state
 change

Le 15/12/2013 22:39, Bob Gilligan a écrit :
>
> 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>
Acked-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
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