allow deletion of segment if endpoint is not managed

in the preop check do not reject the deletion of a segment, if not both endpoints
are managed servers for the suffix

thisis part of work for ticlet #5072

Reviewed-By: Simo Sorce <ssorce@redhat.com>

daemons/ipa-slapi-plugins/topology/topology.h

@@ -283,6 +283,7 @@ void ipa_topo_util_delete_segments_for_host(char *repl_root, char *delhost);
 
 int ipa_topo_util_entry_is_candidate(Slapi_Entry *e);
 int ipa_topo_util_target_is_managed(Slapi_Entry *e);
+int ipa_topo_util_segment_is_managed(TopoReplica *tconf, TopoReplicaSegment *tsegm);
 char * ipa_topo_util_get_segm_attr(TopoReplicaAgmt *agmt, char *attr_type);
 void ipa_topo_util_set_segm_attr(TopoReplicaAgmt *agmt, char *attr_type,
                                  char *attr_val);

daemons/ipa-slapi-plugins/topology/topology_pre.c

@@ -406,6 +406,11 @@ ipa_topo_check_topology_disconnect(Slapi_PBlock *pb)
                             "segment to be deleted does not exist\n");
             goto done;
         }
+        if (!ipa_topo_util_segment_is_managed(tconf,tsegm)) {
+            /* not both endpoints are managed servers, delete is ok */
+            rc = 0;
+            goto done;
+        }
         /* check if removal of segment would break connectivity */
         fanout = ipa_topo_connection_fanout(tconf, tsegm);
         if (fanout == NULL) goto done;

daemons/ipa-slapi-plugins/topology/topology_util.c

@@ -1036,6 +1036,17 @@ ipa_topo_util_target_is_managed(Slapi_Entry *e)
 
 }
 
+int ipa_topo_util_segment_is_managed(TopoReplica *tconf, TopoReplicaSegment *tsegm)
+{
+    int ret = 0;
+
+    if (ipa_topo_cfg_host_find(tconf, tsegm->from, 1) &&
+        ipa_topo_cfg_host_find(tconf, tsegm->to, 1)) {
+        ret = 1;
+    }
+    return ret;
+}
+
 void
 ipa_topo_util_segm_update (TopoReplica *tconf,
                                TopoReplicaSegment *tsegm,