From: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
To: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
Rodrigo Moya <rodrigo.moya@collabora.co.uk>,
David Laight <David.Laight@aculab.com>,
David Miller <davem@davemloft.net>,
javier@collabora.co.uk, lennart@poettering.net,
kay.sievers@vrfy.org, alban.crequy@collabora.co.uk,
bart.cerneels@collabora.co.uk, sjoerd.simons@collabora.co.uk,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/10] af_unix: add multicast and filtering features to AF_UNIX
Date: Thu, 01 Mar 2012 18:06:06 +0100 [thread overview]
Message-ID: <4F4FAC7E.2090604@collabora.co.uk> (raw)
In-Reply-To: <CABBYNZKN+7z4Sr9DBniokez6Jru02LxPgWdGNcVeYECse+AzEQ@mail.gmail.com>
On 03/01/2012 05:02 PM, Luiz Augusto von Dentz wrote:
> Hi Javier,
>
> On Thu, Mar 1, 2012 at 3:56 PM, Javier Martinez Canillas
> <javier.martinez@collabora.co.uk> wrote:
>>>
>>> Anyway, if you think multicast sockets is the way to go, then you could
>>> setup a virtual network just to be able to use AF_INET multicast.
>>>
>>> Thats probably doable without kernel patching.
>>>
>>
>> We could use AF_INET multicast on a local machine but we need some
>> ordering and control flow requirements that are not guaranteed on UDP
>> multicast over IP. That's why we thought to add a new address family
>> AF_MCAST.
>
> I don't want to sound like a broken record, but Im afraid I have to,
> what about Ancillary Messages, how you are going to support passing
> fd? Actually the whole virtual network sounds like a bad idea, are we
> going to give ips to each and every application connected to the bus,
> actually it is necessary to have one virtual network for each bus.
>
> Contrary to someones believes I don't think AF_INET is that fast (e.g.
> http://scottmoonen.com/2008/04/05/a-performance-comparison-of-af_unix-with-loopback-on-linux/)
>
>
You are right. Ancillary messages are PF_UNIX specific and also some
D-bus applications use fd passing for out-of-band communication. So,
using multicast on AF_INET will break these applications.
Regards,
Javier
next prev parent reply other threads:[~2012-03-01 17:05 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-20 15:57 [PATCH 0/10] af_unix: add multicast and filtering features to AF_UNIX Javier Martinez Canillas
2012-02-20 15:57 ` [PATCH 01/10] af_unix: Documentation on multicast unix sockets Javier Martinez Canillas
2012-02-20 15:57 ` [PATCH 02/10] af_unix: Add constant for unix socket options level Javier Martinez Canillas
2012-02-20 15:57 ` [PATCH 03/10] af_unix: add setsockopt on unix sockets Javier Martinez Canillas
2012-02-20 16:20 ` David Miller
2012-02-20 19:13 ` [PATCH 0/10] af_unix: add multicast and filtering features to AF_UNIX Colin Walters
2012-02-21 8:07 ` Rodrigo Moya
2012-02-24 20:36 ` David Miller
2012-02-27 14:00 ` Javier Martinez Canillas
2012-02-27 19:05 ` David Miller
2012-02-28 10:47 ` Rodrigo Moya
2012-02-28 14:28 ` David Lamparter
2012-02-28 15:24 ` Javier Martinez Canillas
2012-02-28 16:33 ` Javier Martinez Canillas
2012-02-28 19:05 ` David Miller
2012-03-01 11:57 ` Javier Martinez Canillas
2012-03-01 12:26 ` Eric Dumazet
2012-03-01 12:33 ` David Laight
2012-03-01 12:50 ` Rodrigo Moya
2012-03-01 12:59 ` Eric Dumazet
2012-03-01 13:56 ` Javier Martinez Canillas
2012-03-01 16:00 ` Eric Dumazet
2012-03-01 16:02 ` Luiz Augusto von Dentz
2012-03-01 17:06 ` Javier Martinez Canillas [this message]
2012-03-01 17:59 ` Eric Dumazet
2012-03-01 18:10 ` Alan Cox
2012-03-01 19:02 ` Javier Martinez Canillas
2012-03-01 19:29 ` Javier Martinez Canillas
2012-03-01 18:53 ` David Dillow
2012-03-01 20:55 ` David Miller
2012-03-02 4:40 ` Stephen Hemminger
2012-03-01 20:44 ` David Miller
2012-03-01 22:01 ` Luiz Augusto von Dentz
2012-03-01 22:08 ` David Miller
2012-03-02 8:39 ` Luiz Augusto von Dentz
2012-03-02 8:55 ` David Miller
2012-03-02 9:27 ` Javier Martinez Canillas
2012-03-02 9:39 ` David Miller
2012-03-02 13:13 ` Eric Dumazet
2012-03-02 16:34 ` Javier Martinez Canillas
2012-03-02 17:08 ` Alan Cox
2012-03-05 8:38 ` Luiz Augusto von Dentz
2012-03-05 14:05 ` Martin Mares
2012-03-05 15:11 ` Javier Martinez Canillas
2012-03-05 15:49 ` Martin Mares
2012-03-05 18:55 ` David Lamparter
2012-03-02 10:08 ` Luiz Augusto von Dentz
2012-03-03 12:20 ` Martin Mares
2012-03-02 22:19 ` david
2012-03-01 12:57 ` Luiz Augusto von Dentz
2012-03-01 20:42 ` David Miller
2012-03-01 14:25 Erik Hugne
2012-03-01 17:18 ` Rodrigo Moya
2012-03-02 7:01 ` Ying Xue
[not found] ` <4F506ABC.8050807@windriver.com>
2012-03-05 15:49 ` Erik Hugne
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