[PATCH 07/12] schema: Introduce scaffolding for schema for <privateData> elements

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Libvirt internally (e.g. in the status XML) stores additional data for
various objects described by the XML. The data is usually stored in
<privateData> or similar sub-elements.

This patch adds possibility for internal schema files to describe the
<privateData> elements by schema while still disallowing them for the
public schema.

This patch adds definitions for private data of <disk> and the
corresponding storage source of a disk.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/conf/schemas/domaincommon.rng |  3 +++
 src/conf/schemas/privatedata.rng  | 30 ++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 src/conf/schemas/privatedata.rng

diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
index ebdf21fe99..85e2e0c57b 100644
--- a/src/conf/schemas/domaincommon.rng
+++ b/src/conf/schemas/domaincommon.rng
@@ -6,6 +6,7 @@
   <include href="networkcommon.rng"/>
   <include href="cputypes.rng"/>
   <include href="nwfilter_params.rng"/>
+  <include href="privatedata.rng"/>

   <!--
     description and title element, may be placed anywhere under the root
@@ -1698,6 +1699,7 @@
     <interleave>
       <ref name="storageSourceExtra"/>
       <ref name="diskBackingChain"/>
+      <ref name="privateDataDeviceDisk"/>
     </interleave>
   </define>

@@ -1773,6 +1775,7 @@
         </element>
       </element>
     </optional>
+    <ref name="privateDataStorageSource"/>
   </define>

   <define name="diskSource">
diff --git a/src/conf/schemas/privatedata.rng b/src/conf/schemas/privatedata.rng
new file mode 100644
index 0000000000..39551939fa
--- /dev/null
+++ b/src/conf/schemas/privatedata.rng
@@ -0,0 +1,30 @@
+<?xml version="1.0"?>
+<grammar xmlns="http://relaxng.org/ns/structure/1.0"; datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes";>
+
+  <!-- This schema is provides scaffolding for having proper schema for private
+       data elements used by libvirt internally.
+
+       Public schema must not implement any of the defines below.
+
+       To override the definitions below use:
+
+         <define name="..." combine="choice">
+    -->
+
+  <define name="privateDataStorageSource">
+    <optional>
+      <element name="privateData">
+        <notAllowed/>
+      </element>
+    </optional>
+  </define>
+
+  <define name="privateDataDeviceDisk">
+    <optional>
+      <element name="privateData">
+        <notAllowed/>
+      </element>
+    </optional>
+  </define>
+
+</grammar>
-- 
2.38.1




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