diff --git a/src/api/topo_info.c b/src/api/topo_info.c
new file mode 100644
index 0000000000000000000000000000000000000000..4cfa670a7e421d896283571f84bdd5960bf314f5
--- /dev/null
+++ b/src/api/topo_info.c
@@ -0,0 +1,164 @@
+/*****************************************************************************\
+ * topo_info.c - get/print the switch topology state information of slurm
+ *****************************************************************************
+ * Copyright (C) 2009 Lawrence Livermore National Security.
+ * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ * Written by Morris Jette <jette1@llnl.gov>
+ * CODE-OCEC-09-009. All rights reserved.
+ *
+ * This file is part of SLURM, a resource management program.
+ * For details, see <https://computing.llnl.gov/linux/slurm/>.
+ * Please also read the included file: DISCLAIMER.
+ *
+ * SLURM is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * In addition, as a special exception, the copyright holders give permission
+ * to link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two. You must obey the GNU
+ * General Public License in all respects for all of the code used other than
+ * OpenSSL. If you modify file(s) with this exception, you may extend this
+ * exception to your version of the file(s), but you are not obligated to do
+ * so. If you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files in
+ * the program, then also delete it here.
+ *
+ * SLURM is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with SLURM; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+\*****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_SYS_SYSLOG_H
+# include <sys/syslog.h>
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include <slurm/slurm.h>
+
+#include "src/common/parse_time.h"
+#include "src/common/slurm_protocol_api.h"
+#include "src/common/xmalloc.h"
+#include "src/common/xstring.h"
+
+/*
+ * slurm_load_topo - issue RPC to get slurm all switch topology configuration
+ * information
+ * IN node_info_msg_pptr - place to store a node configuration pointer
+ * RET 0 or a slurm error code
+ * NOTE: free the response using slurm_free_topo_info_msg
+ */
+extern int slurm_load_topo(topo_info_response_msg_t **resp)
+{
+ int rc;
+ slurm_msg_t req_msg;
+ slurm_msg_t resp_msg;
+
+ slurm_msg_t_init(&req_msg);
+ slurm_msg_t_init(&resp_msg);
+ req_msg.msg_type = REQUEST_TOPO_INFO;
+ req_msg.data = NULL;
+
+ if (slurm_send_recv_controller_msg(&req_msg, &resp_msg) < 0)
+ return SLURM_ERROR;
+
+ switch (resp_msg.msg_type) {
+ case RESPONSE_TOPO_INFO:
+ *resp = (topo_info_response_msg_t *) resp_msg.data;
+ break;
+ case RESPONSE_SLURM_RC:
+ rc = ((return_code_msg_t *) resp_msg.data)->return_code;
+ slurm_free_return_code_msg(resp_msg.data);
+ if (rc)
+ slurm_seterrno_ret(rc);
+ *resp = NULL;
+ break;
+ default:
+ slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
+ break;
+ }
+
+ return SLURM_PROTOCOL_SUCCESS;
+}
+
+/*
+ * slurm_print_topo_info_msg - output information about all switch topology
+ * configuration information based upon message as loaded using
+ * slurm_load_topo
+ * IN out - file to write to
+ * IN topo_info_msg_ptr - switch topology information message pointer
+ * IN one_liner - print as a single line if not zero
+ */
+extern void slurm_print_topo_info_msg(FILE * out,
+ topo_info_response_msg_t *topo_info_msg_ptr,
+ int one_liner)
+{
+ int i;
+ topo_info_t *topo_ptr = topo_info_msg_ptr->topo_array;
+
+ if (topo_info_msg_ptr->record_count == 0) {
+ error("No topology information available");
+ return;
+ }
+
+ for (i = 0; i < topo_info_msg_ptr->record_count; i++)
+ slurm_print_topo_record(out, &topo_ptr[i], one_liner);
+}
+
+
+
+/*
+ * slurm_print_topo_record - output information about a specific Slurm topology
+ * record based upon message as loaded using slurm_load_topo
+ * IN out - file to write to
+ * IN topo_ptr - an individual switch information record pointer
+ * IN one_liner - print as a single line if not zero
+ * RET out - char * containing formatted output (must be freed after call)
+ * NULL is returned on failure.
+ */
+extern void slurm_print_topo_record(FILE * out, topo_info_t *topo_ptr,
+ int one_liner)
+{
+ char tmp_line[512];
+ char *out_buf = NULL;
+
+ /****** Line 1 ******/
+ snprintf(tmp_line, sizeof(tmp_line),
+ "SwitchName=%s Level=%u LinkSpeed=%u ",
+ topo_ptr->name, topo_ptr->level, topo_ptr->link_speed);
+ xstrcat(out_buf, tmp_line);
+
+ if (topo_ptr->nodes && topo_ptr->nodes[0]) {
+ snprintf(tmp_line, sizeof(tmp_line),
+ "Nodes=%s ", topo_ptr->nodes);
+ xstrcat(out_buf, tmp_line);
+ }
+ if (topo_ptr->switches && topo_ptr->switches[0]) {
+ snprintf(tmp_line, sizeof(tmp_line),
+ "Switches=%s ", topo_ptr->switches);
+ xstrcat(out_buf, tmp_line);
+ }
+
+ xstrcat(out_buf, "\n");
+ fprintf(out, "%s", out_buf);
+ xfree(out_buf);
+}