From d23b9e87344bd7c153e05abdd05cc28840814a22 Mon Sep 17 00:00:00 2001
From: Solomon Hykes <solomon@dotcloud.com>
Date: Sat, 2 Nov 2013 21:25:06 +0000
Subject: [PATCH] devmapper: implement OnRemove

---
 devmapper/plugin.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/devmapper/plugin.go b/devmapper/plugin.go
index 67252eda38..a3ba53d896 100644
--- a/devmapper/plugin.go
+++ b/devmapper/plugin.go
@@ -73,6 +73,13 @@ func (b *DMBackend) OnCreate(img Image, layer archive.Archive) error {
 	return nil
 }
 
+func (b *DMBackend) OnRemove(img Image) error {
+	id := img.ID()
+	if err := b.DeviceSet.RemoveDevice(id); err != nil {
+		return fmt.Errorf("Unable to remove device for %v: %v", id, err)
+	}
+	return nil
+}
 
 func (b *DMBackend) mountpoint(id string) string {
 	if b.home == "" {