list volume sizes

diff --git a/bin/size b/bin/size
new file mode 100755 (executable)
index 0000000..0bcaf9d
--- /dev/null
+++ b/bin/size
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+. /usr/share/ganeti/extstorage/zfs/defaults.sh
+
+zfs get volsize -r $EXTP_ZFS