netdev - Re: [PATCH net-next 2/3] ipv6: mld: do not overwrite uri when receiving an mldv2 query

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Date:	Fri, 26 Sep 2014 14:23:48 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	David L Stevens <david.stevens@...cle.com>
CC:	davem@...emloft.net, hannes@...essinduktion.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 2/3] ipv6: mld: do not overwrite uri when receiving
 an mldv2 query

On 09/26/2014 02:13 PM, David L Stevens wrote:
> On 09/26/2014 05:29 AM, Daniel Borkmann wrote:
>> On 09/26/2014 01:23 AM, David L Stevens wrote:
>
>> I'm fine with either suggestion. Actually the _current_ situation we're in is
>> that in IPv4 we _always_ use the current, uncached _sysctl_ tuned setting of URI
>> (independent of any protocol version); while in IPv6 we use the _cached_ sysctl
>> URI in case of MLDv1 and _always_ overwrite the URI in case of MLDv2 (even for
>> MLDv1). Are you suggesting that, we then better adapt using the maxdelay value
>> everywhere and adapt URI to it, plus having a boolean knob defaulting to off for
>> an admin to enforce always using the provided sysctl default setting and not
>> the snooped MLD?
>
> Yes.
>
> Definitely, IGMP and MLD, all versions, should do the same thing and I think that
> ought to use the querier MRC, if present and not overridden by an admin.
>
> Further, I think a version switch or failure to hear from a querier for qrv*qi
> ought to reset everything.

I'll recook the patch set and keep you in the loop. Thanks David!

Best,
Daniel
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