Re: [PATCH 1/2] net: linkwatch: send change uevent on link changes

From: Jouke Witteveen <redacted>
Date: Sat, 1 Dec 2018 17:00:21 +0100

Make it easy for userspace to respond to acquisition/loss of carrier.
The uevent is picked up by udev and, on systems with systemd, the
device unit of the interface announces a configuration reload.

Signed-off-by: Jouke Witteveen <redacted>
---
I did not want to change the commit message into a systemd-howto, but
subscribing to udev events can be done through a line like
    ReloadPropagatedFrom=sys-subsystem-net-devices-%i.device
in a systemd unit file.

I want to hear more about "why".

If we have the rtnetlink message that can be listened for, userspace
ought to use that.  That's what it is there for.