Re: link up and down

[Marcel Holtmann <marcel@holtmann.org>]

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.

Regards

Marcel