diff -r dc5bd14a4675 tools/xenstore/xs.h
--- a/tools/xenstore/xs.h	Fri Apr 24 13:46:17 2009 +0100
+++ b/tools/xenstore/xs.h	Thu Apr 30 00:39:14 2009 +0800
@@ -23,6 +23,11 @@
 #include <xs_lib.h>
 
 #define XBT_NULL 0
+
+/* Please see xen/io/xs_wire.h for more explantion on these limits */
+#define XS_PAYLOAD_MAX XENSTORE_PAYLOAD_MAX
+#define XS_ABS_PATH_MAX XENSTORE_ABS_PATH_MAX
+#define XS_REL_PATH_MAX XENSTORE_REL_PATH_MAX
 
 struct xs_handle;
 typedef uint32_t xs_transaction_t;