netdev - Re: [PATCH net-next 0/7] netconf: Add support for RTM

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Message-ID: <99dfd055-8098-dd0f-bc1c-fb8d3d0c1190@6wind.com>
Date:   Wed, 29 Mar 2017 16:22:45 +0200
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     David Ahern <dsa@...ulusnetworks.com>,
        David Miller <davem@...emloft.net>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/7] netconf: Add support for RTM_DELNETCONF

Le 29/03/2017 à 16:13, David Ahern a écrit :
> On 3/29/17 3:36 AM, Nicolas Dichtel wrote:
>> Le 29/03/2017 à 07:32, David Miller a écrit :
>>> From: David Ahern <dsa@...ulusnetworks.com>
>>> Date: Tue, 28 Mar 2017 14:28:00 -0700
>>>
>>>> netconf notifications are sent as devices register but not when they
>>>> are deleted leaving userspace caches out of sync. Add support for
>>>> RTM_DELNETCONF to ipv4, ipv6 and mpls.
>> Not sure why those notifications are needed. When an interface is set down, ipv4
>> route deletion are not notified. Why is it needed for netconf?
>>
> 
> We carry a patch to send notifications for route deletes. In general, it
> makes management of libnl caches much easier when delete notifications
> are sent for each type. Without it, a link delete requires walking the
> other caches removing objects.
> 
David rejected this kind of patch several times, but maybe he changed his mind.