qemu: Use VIR_XPATH_NODE_AUTORESTORE when XPath context is modified

Use the new helper when moving around the current node of the XPath
context.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_capabilities.c

@@ -3042,7 +3042,7 @@ virQEMUCapsLoadHostCPUModelInfo(virQEMUCapsPtr qemuCaps,
     char *str = NULL;
     xmlNodePtr hostCPUNode;
     xmlNodePtr *nodes = NULL;
-    xmlNodePtr oldnode = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
     qemuMonitorCPUModelInfoPtr hostCPU = NULL;
     int ret = -1;
     size_t i;
@@ -3160,7 +3160,6 @@ virQEMUCapsLoadHostCPUModelInfo(virQEMUCapsPtr qemuCaps,
     ret = 0;
 
  cleanup:
-    ctxt->node = oldnode;
     VIR_FREE(str);
     VIR_FREE(nodes);
     qemuMonitorCPUModelInfoFree(hostCPU);

src/qemu/qemu_domain.c

@@ -2717,7 +2717,7 @@ qemuDomainObjPrivateXMLParseJobNBDSource(xmlNodePtr node,
                                          xmlXPathContextPtr ctxt,
                                          virDomainDiskDefPtr disk)
 {
-    xmlNodePtr savedNode = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
     qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
     char *format = NULL;
     char *type = NULL;
@@ -2772,7 +2772,6 @@ qemuDomainObjPrivateXMLParseJobNBDSource(xmlNodePtr node,
  cleanup:
     VIR_FREE(format);
     VIR_FREE(type);
-    ctxt->node = savedNode;
     return ret;
 }
 
@@ -2827,7 +2826,7 @@ qemuDomainObjPrivateXMLParseJob(virDomainObjPtr vm,
                                 qemuDomainObjPrivatePtr priv,
                                 xmlXPathContextPtr ctxt)
 {
-    xmlNodePtr savedNode = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
     char *tmp = NULL;
     int ret = -1;
 
@@ -2884,7 +2883,6 @@ qemuDomainObjPrivateXMLParseJob(virDomainObjPtr vm,
     ret = 0;
 
  cleanup:
-    ctxt->node = savedNode;
     VIR_FREE(tmp);
     return ret;
 }

src/qemu/qemu_migration_cookie.c

@@ -946,7 +946,7 @@ qemuMigrationCookieNetworkXMLParse(xmlXPathContextPtr ctxt)
     int n;
     xmlNodePtr *interfaces = NULL;
     char *vporttype;
-    xmlNodePtr save_ctxt = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
 
     if (VIR_ALLOC(optr) < 0)
         goto error;
@@ -978,7 +978,6 @@ qemuMigrationCookieNetworkXMLParse(xmlXPathContextPtr ctxt)
     VIR_FREE(interfaces);
 
  cleanup:
-    ctxt->node = save_ctxt;
     return optr;
 
  error:
@@ -997,7 +996,7 @@ qemuMigrationCookieNBDXMLParse(xmlXPathContextPtr ctxt)
     size_t i;
     int n;
     xmlNodePtr *disks = NULL;
-    xmlNodePtr save_ctxt = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
 
     if (VIR_ALLOC(ret) < 0)
         goto error;
@@ -1044,7 +1043,6 @@ qemuMigrationCookieNBDXMLParse(xmlXPathContextPtr ctxt)
     VIR_FREE(port);
     VIR_FREE(capacity);
     VIR_FREE(disks);
-    ctxt->node = save_ctxt;
     return ret;
  error:
     qemuMigrationCookieNBDFree(ret);
@@ -1058,7 +1056,7 @@ qemuMigrationCookieStatisticsXMLParse(xmlXPathContextPtr ctxt)
 {
     qemuDomainJobInfoPtr jobInfo = NULL;
     qemuMonitorMigrationStats *stats;
-    xmlNodePtr save_ctxt = ctxt->node;
+    VIR_XPATH_NODE_AUTORESTORE(ctxt);
 
     if (!(ctxt->node = virXPathNode("./statistics", ctxt)))
         goto cleanup;
@@ -1136,7 +1134,6 @@ qemuMigrationCookieStatisticsXMLParse(xmlXPathContextPtr ctxt)
     virXPathInt("string(./" VIR_DOMAIN_JOB_AUTO_CONVERGE_THROTTLE "[1])",
                 ctxt, &stats->cpu_throttle_percentage);
  cleanup:
-    ctxt->node = save_ctxt;
     return jobInfo;
 }