Re: link up and down

[Stephen Hemminger <shemminger@linux-foundation.org>]

On Tue, 11 Aug 2009 15:17:47 -0700
Marcel Holtmann <marcel@holtmann.org> wrote:

> Hi Greg,
> 
> > > the linux kernel is running on an embedded box ... so if i can achieve
> > > this using hotplug2 , i can save a lot of flash by not intstalling
> > > ethtool ..
> > > is there any way
> > 
> > You are really using hotplug2 for a device?  Are you insane?  That's
> > very old, unsupported, and buggy code that was a totally bad idea when I
> > wrote it.
> > 
> > Please do not use it, it will break and cause bad things to happen.
> > 
> > And no, there are no hotplug events for link up/down, use ethtool like
> > it is designed for.
> 
> actually there was a patch for KOBJ_CHANGE events when network interface
> flags change, but it never got merged upstream.
> 
> Also just using RTNL and listening for IFF_LOWER_UP is way simpler than
> going through uevents.

Have you looked at netplugd?