numa: Introduce virDomainNumaNodeDistanceIsUsingDefaults

The function returns true/false depending on distance
configuration being present in the domain XML.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>

src/conf/numa_conf.c

@@ -1137,6 +1137,27 @@ virDomainNumaSetNodeCount(virDomainNumaPtr numa, size_t nmem_nodes)
     return numa->nmem_nodes;
 }
 
+
+bool
+virDomainNumaNodeDistanceIsUsingDefaults(virDomainNumaPtr numa,
+                                         size_t node,
+                                         size_t sibling)
+{
+    if (node >= numa->nmem_nodes ||
+        sibling >= numa->nmem_nodes)
+        return false;
+
+    if (!numa->mem_nodes[node].distances)
+        return true;
+
+    if (numa->mem_nodes[node].distances[sibling].value == LOCAL_DISTANCE ||
+        numa->mem_nodes[node].distances[sibling].value == REMOTE_DISTANCE)
+        return true;
+
+    return false;
+}
+
+
 size_t
 virDomainNumaGetNodeDistance(virDomainNumaPtr numa,
                              size_t node,

src/conf/numa_conf.h

@@ -87,6 +87,10 @@ int virDomainNumatuneMaybeGetNodeset(virDomainNumaPtr numatune,
 
 size_t virDomainNumaGetNodeCount(virDomainNumaPtr numa);
 
+bool virDomainNumaNodeDistanceIsUsingDefaults(virDomainNumaPtr numa,
+                                              size_t node,
+                                              size_t sibling)
+    ATTRIBUTE_NONNULL(1);
 size_t virDomainNumaGetNodeDistance(virDomainNumaPtr numa,
                                     size_t node,
                                     size_t sibling)

src/libvirt_private.syms

@@ -726,6 +726,7 @@ virDomainNumaGetNodeDistance;
 virDomainNumaGetNodeMemoryAccessMode;
 virDomainNumaGetNodeMemorySize;
 virDomainNumaNew;
+virDomainNumaNodeDistanceIsUsingDefaults;
 virDomainNumaSetNodeCount;
 virDomainNumaSetNodeCpumask;
 virDomainNumaSetNodeDistance;