conf: Check for NUMA distances in validity check

NUMA distances are part of guest ABI (guests can read it
directly!) and therefore as such shouldn't change throughout the
lifetime of domain.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/conf/numa_conf.c

@@ -1074,6 +1074,7 @@ virDomainNumaCheckABIStability(virDomainNumaPtr src,
                                virDomainNumaPtr tgt)
 {
     size_t i;
+    size_t j;
 
     if (virDomainNumaGetNodeCount(src) != virDomainNumaGetNodeCount(tgt)) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -1102,6 +1103,17 @@ virDomainNumaCheckABIStability(virDomainNumaPtr src,
                              "match source"), i);
             return false;
         }
+
+        for (j = 0; j < virDomainNumaGetNodeCount(src); j++) {
+            if (virDomainNumaGetNodeDistance(src, i, j) !=
+                virDomainNumaGetNodeDistance(tgt, i, j)) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("Target NUMA distance from %zu to %zu "
+                                 "doesn't match source"), i, j);
+
+                return false;
+            }
+        }
     }
 
     return true;