From 52be8aa6155854d053e272a080103ebec17dae28 Mon Sep 17 00:00:00 2001
From: Stefan Junker <mail@stefanjunker.de>
Date: Wed, 2 Mar 2016 12:54:43 +0100
Subject: [PATCH] plugins/loopback: take lo down on CmdDel

---
 plugins/main/loopback/loopback.go | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/plugins/main/loopback/loopback.go b/plugins/main/loopback/loopback.go
index eb02eb19..b4e06bd9 100644
--- a/plugins/main/loopback/loopback.go
+++ b/plugins/main/loopback/loopback.go
@@ -33,7 +33,24 @@ func cmdAdd(args *skel.CmdArgs) error {
 }
 
 func cmdDel(args *skel.CmdArgs) error {
-	// del does nothing, we're going to destroy the device anyway
+	args.IfName = "lo" // ignore config, this only works for loopback
+	err := ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
+		link, err := netlink.LinkByName(args.IfName)
+		if err != nil {
+			return err // not tested
+		}
+
+		err = netlink.LinkSetDown(link)
+		if err != nil {
+			return err // not tested
+		}
+
+		return nil
+	})
+	if err != nil {
+		return err // not tested
+	}
+
 	return nil
 }