netdev - Re: [RFC RTNETLINK 04/09]: Link creation API

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Date:	Tue, 5 Jun 2007 16:16:18 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	netdev@...r.kernel.org, socketcan@...tkopp.net, hadi@...erus.ca,
	xemul@...ru, ebiederm@...ssion.com, tgraf@...g.ch
Subject: Re: [RFC RTNETLINK 04/09]: Link creation API

On Wed, 06 Jun 2007 01:17:11 +0200
Patrick McHardy <kaber@...sh.net> wrote:

> Stephen Hemminger wrote:
> > On Tue,  5 Jun 2007 16:12:57 +0200 (MEST)
> > Patrick McHardy <kaber@...sh.net> wrote:
> > 
> > 
> >>[RTNETLINK]: Link creation API
> >>
> >>Add rtnetlink API for creating, changing and deleting software devices.
> >>
> >>Signed-off-by: Patrick McHardy <kaber@...sh.net>
> >>
> > 
> > If you want I'll extend existing bridge netlink to use these.
> 
> 
> Are you talking about brige-port information or bridge device
> configuration? So far the API is not suitable for anything that
> currently uses IFLA_PROTINFO because the sender is not the driver
> which created the device and doesn't use AF_UNSPEC. For bridge
> device configuration it would certainly be nice to have, but I'm
> not sure yet how to handle enslave operations. So far my favourite
> idea is to add enslave/release operations to rtnl_link_ops and call
> them when IFLA_MASTER is set (so the netlink message would look like
> this: ifindex: eth0 master: br0 nlmsg_type: RTM_NETLINK). But I
> haven't really thought this through yet.

Was thinking AF_BRIDGE (we have it already so use it), and both
add/remove bridge, and enslave/unslave device.


> I would also like to add support for handling "secondary device state"
> like bridge port state and others that currently use IFLA_PROTINFO
> (a lot of the code is very similar to the generic code), but all ideas
> so far turned out not to work very well.
> 
> I'm leaving for a short vacation until Sunday tommorrow, so replies
> may be delayed :)


-- 
Stephen Hemminger <shemminger@...ux-foundation.org>
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