test: Add testcfg to exercise some cfg functions

Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>

test/.gitignore

@@ -9,6 +9,7 @@ logsysrec
 ploadstart
 stress_cpgcontext
 stress_cpgfdget
+testcfg
 testcpg
 testcpg2
 testquorum

test/Makefile.am

@@ -38,7 +38,7 @@ noinst_PROGRAMS		= testcpg testcpg2 cpgbench \
 			  testquorum testvotequorum1 testvotequorum2	\
 			  stress_cpgfdget stress_cpgcontext cpgbound testsam \
 			  testcpgzc cpgbenchzc testzcgc stress_cpgzc \
-			  testquorummodel
+			  testquorummodel testcfg
 
 noinst_SCRIPTS		= ploadstart
 
@@ -57,6 +57,7 @@ cpgbound_LDADD		= $(LIBQB_LIBS) $(top_builddir)/lib/libcpg.la
 cpgbench_LDADD		= $(LIBQB_LIBS) $(top_builddir)/lib/libcpg.la
 cpgbenchzc_LDADD	= $(LIBQB_LIBS) $(top_builddir)/lib/libcpg.la
 testsam_LDADD		= $(LIBQB_LIBS) $(top_builddir)/lib/libsam.la
+testcfg_LDADD		= $(LIBQB_LIBS) $(top_builddir)/lib/libcfg.la
 
 if HAVE_CRC32
 noinst_PROGRAMS	        += cpghum cpgverify

test/testcfg.c

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2021 Red Hat Inc
+ *
+ * All rights reserved.
+ *
+ * Author: Christine Caulfield <ccaulfie@redhat.com>
+ *
+ * This software licensed under BSD license, the text of which follows:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - Neither the name of the MontaVista Software, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include <corosync/corotypes.h>
+#include <corosync/cfg.h>
+
+static void shutdown_callback(corosync_cfg_handle_t handle, corosync_cfg_shutdown_flags_t flags)
+{
+	/* Prevent shutdown */
+	printf("In shutdown callback  - denying corosync shutdown\n");
+	corosync_cfg_replyto_shutdown(handle, COROSYNC_CFG_SHUTDOWN_FLAG_NO);
+}
+
+static void *dispatch_thread(void *arg)
+{
+	corosync_cfg_handle_t handle = (corosync_cfg_handle_t) arg;
+	int res = CS_OK;
+	while (res == CS_OK) {
+		res = corosync_cfg_dispatch(handle, CS_DISPATCH_ONE);
+	}
+	fprintf(stderr, "ERROR: Corosync shut down\n");
+	return (void*)0;
+}
+
+
+int main (int argc, char *argv[]) {
+	corosync_cfg_handle_t cfg_handle;
+	corosync_cfg_handle_t cfg_handle1;
+	unsigned int local_nodeid;
+	int i;
+	int res;
+	struct corosync_cfg_node_status_v1 ns;
+	pthread_t thread;
+	corosync_cfg_callbacks_t callbacks = {
+		.corosync_cfg_shutdown_callback = shutdown_callback
+	};
+
+	res = corosync_cfg_initialize(&cfg_handle, &callbacks);
+	if (res != CS_OK) {
+		fprintf(stderr, "corosync_Cfg_initialize(0) failed: %d\n", res);
+		return 1;
+	}
+
+	/* Start a new handle & thread to prevent the shutdown we request later on */
+	res = corosync_cfg_initialize(&cfg_handle1, &callbacks);
+	if (res != CS_OK) {
+		fprintf(stderr, "corosync_cfg_initialize(1) failed: %d\n", res);
+		return 1;
+	}
+	res = corosync_cfg_trackstart(cfg_handle1, 0);
+	if (res != CS_OK) {
+		fprintf(stderr, "corosync_cfg_initialize(1) failed: %d\n", res);
+		return 1;
+	}
+	res = pthread_create(&thread, NULL, dispatch_thread, (void*)cfg_handle1);
+	if (res != 0) {
+		perror("pthread_create failed");
+		return 1;
+	}
+
+	/* Exercise a few functions */
+	res = corosync_cfg_local_get(cfg_handle, &local_nodeid);
+	if (res != CS_OK) {
+		fprintf(stderr, "corosync_cfg_local_get failed: %d\n", res);
+		return 1;
+	}
+
+	printf("Local nodeid is %d\n", local_nodeid);
+
+	/*
+	 * Test node_status_get.
+	 * node status for the local node looks odd (cos it's the loopback connection), so
+	 * we try for a node ID one less or more than us just to get output that looks
+	 * sensible to the user.
+	 */
+	res = corosync_cfg_node_status_get(cfg_handle, local_nodeid-1, CFG_NODE_STATUS_V1, &ns);
+	if (res != CS_OK) {
+		res = corosync_cfg_node_status_get(cfg_handle, local_nodeid+1, CFG_NODE_STATUS_V1, &ns);
+	}
+	if (res != CS_OK) {
+		fprintf(stderr, "corosync_cfg_node_status_get failed: %d\n", res);
+		return 1;
+	}
+	printf("Node Status for nodeid %d\n", ns.nodeid);
+	printf("   reachable: %d\n", ns.reachable);
+	printf("   remote: %d\n", ns.remote);
+	printf("   onwire_min: %d\n", ns.onwire_min);
+	printf("   onwire_max: %d\n", ns.onwire_max);
+	printf("   onwire_ver: %d\n", ns.onwire_ver);
+	for (i = 0; i<CFG_MAX_LINKS; i++) {
+		if (ns.link_status[i].enabled) {
+				printf("   Link %d\n", i);
+				printf("      connected: %d\n", ns.link_status[i].connected);
+				printf("      mtu: %d\n", ns.link_status[i].mtu);
+				printf("      src: %s\n", ns.link_status[i].src_ipaddr);
+				printf("      dst: %s\n", ns.link_status[i].dst_ipaddr);
+		}
+	}
+
+	/* This shutdown request should be denied by the thread */
+	res = corosync_cfg_try_shutdown(cfg_handle, COROSYNC_CFG_SHUTDOWN_FLAG_REQUEST);
+
+	if (res == CS_OK) {
+		fprintf(stderr, "ERROR: corosync_cfg_try_shutdown suceeded. should have been prevented\n");
+	}
+	if (res != CS_ERR_BUSY && res != CS_OK) {
+		fprintf(stderr, "corosync_cfg_try_shutdown failed: %d\n", res);
+		return 1;
+	}
+	return 0;
+}