linux-kernel - Re: Existing netlink kernel <--> kernel communication

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Message-ID: <AANLkTikh5vAYIMMIbyMTfnh_SKr7AlOC9yZipHzzNhlW@mail.gmail.com>
Date:	Mon, 19 Jul 2010 11:54:43 -0700
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	Patrick McManus <mcmanus@...ksong.com>
Cc:	Kevin Hayes <kevin@...eros.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	Johannes Berg <johannes@...solutions.net>,
	"John W. Linville" <linville@...driver.com>,
	Jouni Malinen <Jouni.Malinen@...eros.com>,
	Sujith <Sujith.Manoharan@...eros.com>,
	linux-kernel@...r.kernel.org, Dan Tian <Dan.Tian@...eros.com>
Subject: Re: Existing netlink kernel <--> kernel communication

On Mon, Jul 19, 2010 at 9:07 AM, Patrick McManus <mcmanus@...ksong.com> wrote:
> Hi Luis,
>
> I'm following up to a linux kernel post of yours back in December:
>
> http://marc.info/?l=linux-kernel&m=125053428528207&w=3
>
> Basically, I have the same interest - an internal netlink client to the
> qdisc interfaces.. I was wondering if you made any progress on the topic
> you could share? It seems maddening that netlink is promoted as an
> intra-kernel mechanism but it is non-obvious how to write a client..

The reason we at Atheros were considering it was a possible way to
communicate between two different subsystems, in our case Bluetooth
and 802.11. While it is technically possible to use netlink for such
purposes it introduces a layer of complexity which can be avoided by
just using direct exported routines, and by coordinating between the
two subsystems you need communication with.

So, the real question I think is why do you need a rigid API ? If
there is a good need, perhaps its a good idea, but so far I guess no
one simply has come up with one.

  Luis
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