X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fxen%2Fxenbus%2Fxenbus_backend_client.c;h=cd8ba02383ddda5eafdd187ebea6f6f7787a2dff;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=b99991cdabcf11c4352d042f9d57f5736b9dd808;hpb=1db395853d4f30d6120458bd279ede1f882a8525;p=linux-2.6.git

diff --git a/drivers/xen/xenbus/xenbus_backend_client.c b/drivers/xen/xenbus/xenbus_backend_client.c
index b99991cda..cd8ba0238 100644
--- a/drivers/xen/xenbus/xenbus_backend_client.c
+++ b/drivers/xen/xenbus/xenbus_backend_client.c
@@ -132,4 +132,16 @@ int xenbus_unmap_ring(struct xenbus_device *dev,
 }
 EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
 
+int xenbus_dev_is_online(struct xenbus_device *dev)
+{
+	int rc, val;
+
+	rc = xenbus_scanf(XBT_NIL, dev->nodename, "online", "%d", &val);
+	if (rc != 1)
+		val = 0; /* no online node present */
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(xenbus_dev_is_online);
+
 MODULE_LICENSE("Dual BSD/GPL");