netdev - Re: [PATCH net-next] ipmr: ip6mr: Create new sockopt to clear mfc cache or vifs

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Date:   Fri, 8 Feb 2019 16:08:41 +0100
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Callum Sinclair <callum.sinclair@...iedtelesis.co.nz>,
        davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] ipmr: ip6mr: Create new sockopt to clear mfc
 cache or vifs

Le 08/02/2019 à 15:43, Nikolay Aleksandrov a écrit :
> On 08/02/2019 16:18, Nicolas Dichtel wrote:
>> Le 08/02/2019 à 05:11, Callum Sinclair a écrit :
>>> Currently the only way to clear the mfc cache was to delete the entries
>> mfc stands for 'multicast forwarding cache', so 'mfc cache' is a bit strange.
>>
>>> one by one using the MRT_DEL_MFC socket option or to destroy and
>>> recreate the socket.
>> Note that if entries were added with MRT_ADD_MFC_PROXY, they will survive to the
>> socket destruction. This is not the case with your new cmd. Is it intended?
> 
> I think you're referring to MFC_STATIC entries (sk != mroute_sk). It
> doesn't matter how you add an entry - they all get cleaned up if added
> through the mroute socket.
Yes, right.
MRT_FLUSH_MFC_STATIC ?