Convert XenAPI platform values to appropriate types.

XenAPI defines the platform attribute of a VM as a string-string map
but in various code paths in xend the platform entries are expected to be
another type, e.g. int.  This patch defines the types of each platform
entry and converts the entry values to appropriate type when new domU
configuration is created via XenAPI.

Alternatively the values could be casted to appropriate type when used
but seems prudent to do the conversion when domU configuration is
created.

Signed-off-by: Jim Fehlig <jfehlig@novell.com>

tools/python/xen/xend/XendConfig.py

@@ -123,14 +123,43 @@ XENAPI_CFG_TO_LEGACY_CFG = {
 
 LEGACY_CFG_TO_XENAPI_CFG = reverse_dict(XENAPI_CFG_TO_LEGACY_CFG)
 
-# Platform configuration keys.
-XENAPI_PLATFORM_CFG = [ 'acpi', 'apic', 'boot', 'device_model', 'loader', 'display', 
-                        'fda', 'fdb', 'keymap', 'isa', 'localtime', 'monitor', 
-                        'nographic', 'pae', 'rtc_timeoffset', 'serial', 'sdl',
-                        'soundhw','stdvga', 'usb', 'usbdevice', 'hpet', 'vnc',
-                        'vncconsole', 'vncdisplay', 'vnclisten', 'timer_mode',
-                        'vncpasswd', 'vncunused', 'xauthority', 'pci', 'vhpt',
-                        'guest_os_type', 'hap']
+# Platform configuration keys and their types.
+XENAPI_PLATFORM_CFG_TYPES = {
+    'acpi': int,
+    'apic': int,
+    'boot': str,
+    'device_model': str,
+    'loader': str,
+    'display' : str,
+    'fda': str,
+    'fdb': str,
+    'keymap': str,
+    'isa' : int,
+    'localtime': int,
+    'monitor': int,
+    'nographic': int,
+    'pae' : int,
+    'rtc_timeoffset': int,
+    'serial': str,
+    'sdl': int,
+    'soundhw': str,
+    'stdvga': int,
+    'usb': int,
+    'usbdevice': str,
+    'hpet': int,
+    'vnc': int,
+    'vncconsole': int,
+    'vncdisplay': int,
+    'vnclisten': str,
+    'timer_mode': int,
+    'vncpasswd': str,
+    'vncunused': int,
+    'xauthority': str,
+    'pci': str,
+    'vhpt': int,
+    'guest_os_type': str,
+    'hap': int,
+}
 
 # Xen API console 'other_config' keys.
 XENAPI_CONSOLE_OTHER_CFG = ['vncunused', 'vncdisplay', 'vnclisten',
@@ -540,7 +569,7 @@ class XendConfig(dict):
             cfg['platform']['localtime'] = localtime
 
         # Compatibility hack -- can go soon.
-        for key in XENAPI_PLATFORM_CFG:
+        for key in XENAPI_PLATFORM_CFG_TYPES.keys():
             val = sxp.child_value(sxp_cfg, "platform_" + key, None)
             if val is not None:
                 self['platform'][key] = val
@@ -719,7 +748,7 @@ class XendConfig(dict):
             self.update_with_image_sxp(image_sxp)
 
         # Convert Legacy HVM parameters to Xen API configuration
-        for key in XENAPI_PLATFORM_CFG:
+        for key in XENAPI_PLATFORM_CFG_TYPES.keys():
             if key in cfg:
                 self['platform'][key] = cfg[key]
 
@@ -769,7 +798,7 @@ class XendConfig(dict):
             if image_type != 'hvm' and image_type != 'linux':
                 self['platform']['image_type'] = image_type
             
-            for key in XENAPI_PLATFORM_CFG:
+            for key in XENAPI_PLATFORM_CFG_TYPES.keys():
                 val = sxp.child_value(image_sxp, key, None)
                 if val is not None and val != '':
                     self['platform'][key] = val
@@ -853,6 +882,19 @@ class XendConfig(dict):
                 self[key] = type_conv(val)
             else:
                 self[key] = val
+
+        # XenAPI defines platform as a string-string map.  If platform
+        # configuration exists, convert values to appropriate type.
+        if 'platform' in xapi:
+            for key, val in xapi['platform'].items():
+                type_conv = XENAPI_PLATFORM_CFG_TYPES.get(key)
+                if type_conv is None:
+                    key = key.lower()
+                    type_conv = XENAPI_PLATFORM_CFG_TYPES.get(key)
+                    if callable(type_conv):
+                        self['platform'][key] = type_conv(val)
+                    else:
+                        self['platform'][key] = val
                 
         self['vcpus_params']['weight'] = \
             int(self['vcpus_params'].get('weight', 256))
@@ -1531,7 +1573,7 @@ class XendConfig(dict):
         if self.has_key('PV_args') and self['PV_args']:
             image.append(['args', self['PV_args']])
 
-        for key in XENAPI_PLATFORM_CFG:
+        for key in XENAPI_PLATFORM_CFG_TYPES.keys():
             if key in self['platform']:
                 image.append([key, self['platform'][key]])
 
@@ -1567,7 +1609,7 @@ class XendConfig(dict):
             self['PV_ramdisk'] = sxp.child_value(image_sxp, 'ramdisk','')
             self['PV_args'] = kernel_args
 
-        for key in XENAPI_PLATFORM_CFG:
+        for key in XENAPI_PLATFORM_CFG_TYPES.keys():
             val = sxp.child_value(image_sxp, key, None)
             if val is not None and val != '':
                 self['platform'][key] = val