[Xen-changelog] Added sxprs, for xm block-list.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User emellor@ewan
# Node ID 41735ccc5ee3b78eadeea72cef2883c344b821a3
# Parent  7c5d9879967dc91184253c2798344545d6e30b95
Added sxprs, for xm block-list.

diff -r 7c5d9879967d -r 41735ccc5ee3 
tools/python/xen/xend/server/DevController.py
--- a/tools/python/xen/xend/server/DevController.py     Tue Sep 27 21:02:57 2005
+++ b/tools/python/xen/xend/server/DevController.py     Tue Sep 27 21:03:55 2005
@@ -81,6 +81,22 @@
         xstransact.Remove(backpath)
 
 
+    def sxprs(self):
+        """@return an s-expression describing all the devices of this
+        controller's device-class.
+        """
+        path = self.frontendRoot()
+        while True:
+            t = xstransact(path)
+            try:
+                listing = t.list_recursive()
+                if t.commit():
+                    return listing
+            except:
+                t.abort()
+                raise
+
+
     def sxpr(self, devid):
         """@return an s-expression describing the specified device.
         """
@@ -126,8 +142,8 @@
         compulsory to use it; subclasses may prefer to allocate IDs based upon
         the device configuration instead.
         """
+        path = self.frontendMiscPath()
         while True:
-            path = self.frontendMiscPath()
             t = xstransact(path)
             try:
                 result = t.read("nextDeviceID")
@@ -196,8 +212,11 @@
 
 
     def frontendPath(self, devid):
-        return "%s/device/%s/%d" % (self.vm.getPath(), self.deviceClass,
-                                    devid)
+        return "%s/%d" % (self.frontendRoot(), devid)
+
+
+    def frontendRoot(self):
+        return "%s/device/%s" % (self.vm.getPath(), self.deviceClass)
 
 
     def frontendMiscPath(self):

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