netdev - Re: Using netlink for intra-kernel requests?

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Message-ID: <1260376900.31877.10.camel@jdl-desktop>
Date:	Wed, 09 Dec 2009 10:41:40 -0600
From:	Jon Loeliger <jdl@...footnetworks.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	netdev@...r.kernel.org
Subject: Re: Using netlink for intra-kernel requests?

On Wed, 2009-12-09 at 14:33 +0100, Andi Kleen wrote:
> Jon Loeliger <jdl@...footnetworks.com> writes:
> > I feel like I am missing or don't know where to find the
> > documentation for the intra-kernel netlink messaging.
> 
> I don't think the kernel uses intra kernel netlink normally,
> just tends to call functions directly. That's more efficient
> anyways.
> 
> -Andi

Hi Andi,

OK.  So, _which_ set of netlink functions should I use?
Is rtnl_notify() the correct one to use to send a netlink
request for the RTM_GETQDISC or RTM_GETTCCLASS data?

What's the mechanism used to send and then receive a reply?
Will it be async?  How do I specify the call-back to receive
the reply netlink message?  Or will it be synchronous and
I pass in some call-back-reply function?

Thanks for you suggestions!
jdl

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