From ab9baab7290a4a009e4e8ddfb63a2ddd19bb8091 Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Tue, 14 Nov 2017 14:28:11 +0100
Subject: [PATCH] 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     | 21 +++++++++++++++++++++
 src/conf/numa_conf.h     |  4 ++++
 src/libvirt_private.syms |  1 +
 3 files changed, 26 insertions(+)

diff --git a/src/conf/numa_conf.c b/src/conf/numa_conf.c
index c2f0d1ca8c..8fc3b0a196 100644
--- a/src/conf/numa_conf.c
+++ b/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,
diff --git a/src/conf/numa_conf.h b/src/conf/numa_conf.h
index 4655de3aa7..7947fdb219 100644
--- a/src/conf/numa_conf.h
+++ b/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)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d3ca6b2ec4..2fcf0e731d 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -726,6 +726,7 @@ virDomainNumaGetNodeDistance;
 virDomainNumaGetNodeMemoryAccessMode;
 virDomainNumaGetNodeMemorySize;
 virDomainNumaNew;
+virDomainNumaNodeDistanceIsUsingDefaults;
 virDomainNumaSetNodeCount;
 virDomainNumaSetNodeCpumask;
 virDomainNumaSetNodeDistance;
-- 
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