[PATCH 1/4] [Net] Support Xen accelerated network plugin modules

Provide two helper functions (xenbus_for_each_frontend,
xenbus_for_each_backend) to allow drivers to iterate the xenbus frontend
and backend buses.

diff -r 4f67d849e788 linux-2.6-xen-
sparse/drivers/xen/xenbus/xenbus_probe.c

--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c Tue Apr 03

09:03:51 2007 +0100

+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c Tue Apr 03

13:32:33 2007 +0100

@@ -4,6 +4,7 @@
  * Copyright (C) 2005 Rusty Russell, IBM Corporation
  * Copyright (C) 2005 Mike Wray, Hewlett-Packard
  * Copyright (C) 2005, 2006 XenSource Ltd
+ * Copyright (C) 2007 Solarflare Communications, Inc.
  * 
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version

2

@@ -1079,3 +1080,10 @@ static int __init boot_wait_for_devices(

late_initcall(boot_wait_for_devices);
#endif
+
+
+int xenbus_for_each_frontend(void *arg, int (*fn)(struct device *, void
*))
+{
+        return bus_for_each_dev(&xenbus_frontend.bus, NULL, arg, fn);
+}
+EXPORT_SYMBOL_GPL(xenbus_for_each_frontend);
diff -r 4f67d849e788 linux-2.6-xen-
sparse/drivers/xen/xenbus/xenbus_probe_backend.c

--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe_backend.c Tue

Apr 03 09:03:51 2007 +0100

+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe_backend.c Tue

Apr 03 13:32:33 2007 +0100

@@ -4,6 +4,7 @@
  * Copyright (C) 2005 Rusty Russell, IBM Corporation
  * Copyright (C) 2005 Mike Wray, Hewlett-Packard
  * Copyright (C) 2005, 2006 XenSource Ltd
+ * Copyright (C) 2007 Solarflare Communications, Inc.
  * 
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version

2

@@ -284,3 +285,10 @@ void xenbus_backend_device_register(void
       xenbus_backend.error);

}
}
+
+int xenbus_for_each_backend(void *arg, int (*fn)(struct device *, void
*))
+{
+        return bus_for_each_dev(&xenbus_backend.bus, NULL, arg, fn);
+}
+EXPORT_SYMBOL_GPL(xenbus_for_each_backend);
+
diff -r 4f67d849e788 linux-2.6-xen-sparse/include/xen/xenbus.h

--- a/linux-2.6-xen-sparse/include/xen/xenbus.h Tue Apr 03 09:03:51 2007
+0100
+++ b/linux-2.6-xen-sparse/include/xen/xenbus.h Tue Apr 03 13:32:33 2007
+0100

@@ -299,4 +299,7 @@ int xenbus_dev_is_online(struct xenbus_d

int xenbus_dev_is_online(struct xenbus_device *dev);
int xenbus_frontend_closed(struct xenbus_device *dev);

+extern int xenbus_for_each_backend(void *arg, int (*fn)(struct device
*, void *));
+extern int xenbus_for_each_frontend(void *arg, int (*fn)(struct device
*, void *));
+
#endif /* _XEN_XENBUS_H */