[libvirt PATCH 1/4] virxml: Fix schema validation of individual nodes

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xmlDocSetRootElement removes the node from its previous document tree,
effectively removing the "<cpu>" node from "<domain>" in virCPUDefParseXML.

Signed-off-by: Tim Wiederhake <twiederh@xxxxxxxxxx>
---
 src/conf/cpu_conf.c |  3 +--
 src/util/virxml.c   | 13 ++++++-------
 src/util/virxml.h   |  1 -
 3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c
index c7bea8ae00..58ca1e2019 100644
--- a/src/conf/cpu_conf.c
+++ b/src/conf/cpu_conf.c
@@ -355,8 +355,7 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
                                                PKGDATADIR "/schemas")))
             return -1;
 
-        if (virXMLValidateNodeAgainstSchema(schemafile, ctxt->doc,
-                                            ctxt->node) < 0)
+        if (virXMLValidateNodeAgainstSchema(schemafile, ctxt->node) < 0)
             return -1;
     }
 
diff --git a/src/util/virxml.c b/src/util/virxml.c
index d0d9494009..418be2a898 100644
--- a/src/util/virxml.c
+++ b/src/util/virxml.c
@@ -1551,16 +1551,15 @@ virXMLValidateAgainstSchema(const char *schemafile,
 
 
 int
-virXMLValidateNodeAgainstSchema(const char *schemafile,
-                                xmlDocPtr doc,
-                                xmlNodePtr node)
+virXMLValidateNodeAgainstSchema(const char *schemafile, xmlNodePtr node)
 {
-    xmlNodePtr root;
     int ret;
+    xmlDocPtr copy = xmlNewDoc(NULL);
 
-    root = xmlDocSetRootElement(doc, node);
-    ret = virXMLValidateAgainstSchema(schemafile, doc);
-    xmlDocSetRootElement(doc, root);
+    xmlDocSetRootElement(copy, xmlCopyNode(node, true));
+    ret = virXMLValidateAgainstSchema(schemafile, copy);
+
+    xmlFreeDoc(copy);
     return ret;
 }
 
diff --git a/src/util/virxml.h b/src/util/virxml.h
index 2b40398eee..c0405a39f0 100644
--- a/src/util/virxml.h
+++ b/src/util/virxml.h
@@ -296,7 +296,6 @@ virXMLValidateAgainstSchema(const char *schemafile,
 
 int
 virXMLValidateNodeAgainstSchema(const char *schemafile,
-                                xmlDocPtr doc,
                                 xmlNodePtr node);
 
 void
-- 
2.26.3




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