From 6772b9364a9ef8b44a7c4deef0544df95bf88741 Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Fri, 25 Jun 2010 11:08:52 -0600
Subject: [PATCH] qdev: Add a get_dev_path() function to BusInfo

This function is meant to provide a stable device path for buses
which are able to implement it.  If a bus has a globally unique
addresses scheme, one address level may be sufficient to provide
a path.  Other buses may need to recursively traverse up the
qdev tree.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 hw/qdev.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/qdev.h b/hw/qdev.h
index cbc89f2c1e..3e22eecc06 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -49,10 +49,13 @@ struct DeviceState {
 };
 
 typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent);
+typedef char *(*bus_get_dev_path)(DeviceState *dev);
+
 struct BusInfo {
     const char *name;
     size_t size;
     bus_dev_printfn print_dev;
+    bus_get_dev_path get_dev_path;
     Property *props;
 };