multipath: need_shutdown if multipath devices exist

https://bugzilla.redhat.com/show_bug.cgi?id=994913

modules.d/90multipath/module-setup.sh

@@ -95,6 +95,9 @@ install() {
         inst_hook pre-trigger 02 "$moddir/multipathd.sh"
         inst_hook cleanup   02 "$moddir/multipathd-stop.sh"
     fi
+
+    inst_hook cleanup   80 "$moddir/multipathd-needshutdown.sh"
+
     inst_rules 40-multipath.rules 62-multipath.rules 65-multipath.rules 66-kpartx.rules
 }
 

modules.d/90multipath/multipathd-needshutdown.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+for i in /dev/mapper/mpath*; do
+    [ -b "$i" ] || continue
+    need_shutdown
+    break
+done