totemconfig.c
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totemconfig.c
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	/*
	* Copyright (c) 2002-2005 MontaVista Software, Inc.
	* Copyright (c) 2006-2009 Red Hat, Inc.
	*
	* All rights reserved.
	*
	* Author: Steven Dake (sdake@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 <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#include <errno.h>
	#include <unistd.h>
	#include <sys/socket.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <fcntl.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <sys/param.h>

	#include <corosync/swab.h>
	#include <corosync/list.h>
	#include <corosync/totem/totem.h>
	#include <corosync/engine/objdb.h>
	#include <corosync/engine/config.h>
	#include <corosync/engine/logsys.h>

	#ifdef HAVE_LIBNSS
	#include <nss.h>
	#include <pk11pub.h>
	#include <pkcs11.h>
	#include <prerror.h>
	#endif

	#include "util.h"
	#include "totemconfig.h"
	#include "tlist.h" /* for HZ */

	#define TOKEN_RETRANSMITS_BEFORE_LOSS_CONST 4
	#define TOKEN_TIMEOUT 1000
	#define TOKEN_RETRANSMIT_TIMEOUT (int)(TOKEN_TIMEOUT / (TOKEN_RETRANSMITS_BEFORE_LOSS_CONST + 0.2))
	#define TOKEN_HOLD_TIMEOUT (int)(TOKEN_RETRANSMIT_TIMEOUT * 0.8 - (1000/(int)HZ))
	#define JOIN_TIMEOUT 50
	#define CONSENSUS_TIMEOUT 800
	#define MERGE_TIMEOUT 200
	#define DOWNCHECK_TIMEOUT 1000
	#define FAIL_TO_RECV_CONST 50
	#define SEQNO_UNCHANGED_CONST 30
	#define MINIMUM_TIMEOUT (int)(1000/HZ)*3
	#define MAX_NETWORK_DELAY 50
	#define WINDOW_SIZE 50
	#define MAX_MESSAGES 17
	#define RRP_PROBLEM_COUNT_TIMEOUT 2000
	#define RRP_PROBLEM_COUNT_THRESHOLD_DEFAULT 10
	#define RRP_PROBLEM_COUNT_THRESHOLD_MIN 5

	static char error_string_response[512];
	static struct objdb_iface_ver0 *global_objdb;

	static void add_totem_config_notification(
	struct objdb_iface_ver0 *objdb,
	struct totem_config *totem_config,
	hdb_handle_t totem_object_handle);


	/* These just makes the code below a little neater */
	static inline int objdb_get_string (
	const struct objdb_iface_ver0 *objdb,
	hdb_handle_t object_service_handle,
	const char key, const char *value)
	{
	int res;

	*value = NULL;
	if ( !(res = objdb->object_key_get (object_service_handle,
	key,
	strlen (key),
	(void *)value,
	NULL))) {

	if (*value) {
	return 0;
	}
	}
	return -1;
	}

	static inline void objdb_get_int (
	const struct objdb_iface_ver0 *objdb,
	hdb_handle_t object_service_handle,
	const char key, unsigned int intvalue)
	{
	char *value = NULL;

	if (!objdb->object_key_get (object_service_handle,
	key,
	strlen (key),
	(void *)&value,
	NULL)) {

	if (value) {
	*intvalue = atoi(value);
	}
	}
	}

	static unsigned int totem_handle_find (
	struct objdb_iface_ver0 *objdb,
	hdb_handle_t *totem_find_handle) {

	hdb_handle_t object_find_handle;
	unsigned int res;

	/*
	* Find a network section
	*/
	objdb->object_find_create (
	OBJECT_PARENT_HANDLE,
	"network",
	strlen ("network"),
	&object_find_handle);

	res = objdb->object_find_next (
	object_find_handle,
	totem_find_handle);

	objdb->object_find_destroy (object_find_handle);

	/*
	* Network section not found in configuration, checking for totem
	*/
	if (res == -1) {
	objdb->object_find_create (
	OBJECT_PARENT_HANDLE,
	"totem",
	strlen ("totem"),
	&object_find_handle);

	res = objdb->object_find_next (
	object_find_handle,
	totem_find_handle);

	objdb->object_find_destroy (object_find_handle);
	}

	if (res == -1) {
	return (-1);
	}

	return (0);
	}

	static void totem_volatile_config_read (
	struct objdb_iface_ver0 *objdb,
	struct totem_config *totem_config,
	hdb_handle_t object_totem_handle)
	{
	objdb_get_int (objdb,object_totem_handle, "token", &totem_config->token_timeout);

	objdb_get_int (objdb,object_totem_handle, "token_retransmit", &totem_config->token_retransmit_timeout);

	objdb_get_int (objdb,object_totem_handle, "hold", &totem_config->token_hold_timeout);

	objdb_get_int (objdb,object_totem_handle, "token_retransmits_before_loss_const", &totem_config->token_retransmits_before_loss_const);

	objdb_get_int (objdb,object_totem_handle, "join", &totem_config->join_timeout);
	objdb_get_int (objdb,object_totem_handle, "send_join", &totem_config->send_join_timeout);

	objdb_get_int (objdb,object_totem_handle, "consensus", &totem_config->consensus_timeout);

	objdb_get_int (objdb,object_totem_handle, "merge", &totem_config->merge_timeout);

	objdb_get_int (objdb,object_totem_handle, "downcheck", &totem_config->downcheck_timeout);

	objdb_get_int (objdb,object_totem_handle, "fail_recv_const", &totem_config->fail_to_recv_const);

	objdb_get_int (objdb,object_totem_handle, "seqno_unchanged_const", &totem_config->seqno_unchanged_const);

	objdb_get_int (objdb,object_totem_handle, "rrp_token_expired_timeout", &totem_config->rrp_token_expired_timeout);

	objdb_get_int (objdb,object_totem_handle, "rrp_problem_count_timeout", &totem_config->rrp_problem_count_timeout);

	objdb_get_int (objdb,object_totem_handle, "rrp_problem_count_threshold", &totem_config->rrp_problem_count_threshold);

	objdb_get_int (objdb,object_totem_handle, "heartbeat_failures_allowed", &totem_config->heartbeat_failures_allowed);

	objdb_get_int (objdb,object_totem_handle, "max_network_delay", &totem_config->max_network_delay);

	objdb_get_int (objdb,object_totem_handle, "window_size", &totem_config->window_size);
	objdb_get_string (objdb, object_totem_handle, "vsftype", &totem_config->vsf_type);

	objdb_get_int (objdb,object_totem_handle, "max_messages", &totem_config->max_messages);

	}


	static void totem_get_crypto_type(
	const struct objdb_iface_ver0 *objdb,
	hdb_handle_t object_totem_handle,
	struct totem_config *totem_config)
	{
	const char *str;

	totem_config->crypto_accept = TOTEM_CRYPTO_ACCEPT_OLD;
	if (!objdb_get_string (objdb, object_totem_handle, "crypto_accept", &str)) {
	if (strcmp(str, "new") == 0) {
	totem_config->crypto_accept = TOTEM_CRYPTO_ACCEPT_NEW;
	}
	}

	totem_config->crypto_type = TOTEM_CRYPTO_SOBER;

	#ifdef HAVE_LIBNSS
	/*
	* We must set these even if the key does not exist.
	* Encryption type can be set on-the-fly using CFG
	*/
	totem_config->crypto_crypt_type = CKM_AES_CBC_PAD;
	totem_config->crypto_sign_type = CKM_SHA256_RSA_PKCS;
	#endif

	if (!objdb_get_string (objdb, object_totem_handle, "crypto_type", &str)) {
	if (strcmp(str, "sober") == 0) {
	return;
	}
	#ifdef HAVE_LIBNSS
	if (strcmp(str, "nss") == 0) {
	totem_config->crypto_type = TOTEM_CRYPTO_NSS;

	}
	#endif
	}
	}



	extern int totem_config_read (
	struct objdb_iface_ver0 *objdb,
	struct totem_config *totem_config,
	const char **error_string)
	{
	int res = 0;
	hdb_handle_t object_totem_handle;
	hdb_handle_t object_interface_handle;
	const char *str;
	unsigned int ringnumber = 0;
	hdb_handle_t object_find_interface_handle;

	res = totem_handle_find (objdb, &object_totem_handle);
	if (res == -1) {
	printf ("couldn't find totem handle\n");
	return (-1);
	}

	memset (totem_config, 0, sizeof (struct totem_config));
	totem_config->interfaces = malloc (sizeof (struct totem_interface) * INTERFACE_MAX);
	if (totem_config->interfaces == 0) {
	*error_string = "Out of memory trying to allocate ethernet interface storage area";
	return -1;
	}

	memset (totem_config->interfaces, 0,
	sizeof (struct totem_interface) * INTERFACE_MAX);

	totem_config->secauth = 1;

	strcpy (totem_config->rrp_mode, "none");

	if (!objdb_get_string (objdb, object_totem_handle, "version", &str)) {
	if (strcmp (str, "2") == 0) {
	totem_config->version = 2;
	}
	}
	if (!objdb_get_string (objdb, object_totem_handle, "secauth", &str)) {
	if (strcmp (str, "on") == 0) {
	totem_config->secauth = 1;
	}
	if (strcmp (str, "off") == 0) {
	totem_config->secauth = 0;
	}
	}

	if (totem_config->secauth == 1) {
	totem_get_crypto_type(objdb, object_totem_handle, totem_config);
	}

	if (!objdb_get_string (objdb, object_totem_handle, "rrp_mode", &str)) {
	strcpy (totem_config->rrp_mode, str);
	}

	/*
	* Get interface node id
	*/
	objdb_get_int (objdb, object_totem_handle, "nodeid", &totem_config->node_id);

	objdb_get_int (objdb,object_totem_handle, "threads", &totem_config->threads);


	objdb_get_int (objdb,object_totem_handle, "netmtu", &totem_config->net_mtu);

	/*
	* Get things that might change in the future
	*/
	totem_volatile_config_read (objdb, totem_config, object_totem_handle);

	objdb->object_find_create (
	object_totem_handle,
	"interface",
	strlen ("interface"),
	&object_find_interface_handle);

	while (objdb->object_find_next (
	object_find_interface_handle,
	&object_interface_handle) == 0) {

	objdb_get_int (objdb, object_interface_handle, "ringnumber", &ringnumber);

	/*
	* Get interface multicast address
	*/
	if (!objdb_get_string (objdb, object_interface_handle, "mcastaddr", &str)) {
	res = totemip_parse (&totem_config->interfaces[ringnumber].mcast_addr, str, 0);
	}

	/*
	* Get mcast port
	*/
	if (!objdb_get_string (objdb, object_interface_handle, "mcastport", &str)) {
	totem_config->interfaces[ringnumber].ip_port = atoi (str);
	}

	/*
	* Get the bind net address
	*/
	if (!objdb_get_string (objdb, object_interface_handle, "bindnetaddr", &str)) {

	res = totemip_parse (&totem_config->interfaces[ringnumber].bindnet, str,
	totem_config->interfaces[ringnumber].mcast_addr.family);
	}
	totem_config->interface_count++;
	}

	objdb->object_find_destroy (object_find_interface_handle);

	add_totem_config_notification(objdb, totem_config, object_totem_handle);

	return 0;
	}

	int totem_config_validate (
	struct totem_config *totem_config,
	const char **error_string)
	{
	static char local_error_reason[512];
	char parse_error[512];
	const char *error_reason = local_error_reason;
	int i;
	unsigned int interface_max = INTERFACE_MAX;

	if (totem_config->interface_count == 0) {
	error_reason = "No interfaces defined";
	goto parse_error;
	}

	for (i = 0; i < totem_config->interface_count; i++) {
	/*
	* Some error checking of parsed data to make sure its valid
	*/
	if ((int *)&totem_config->interfaces[i].mcast_addr.addr == 0) {
	error_reason = "No multicast address specified";
	goto parse_error;
	}

	if (totem_config->interfaces[i].ip_port == 0) {
	error_reason = "No multicast port specified";
	goto parse_error;
	}

	if (totem_config->interfaces[i].mcast_addr.family == AF_INET6 &&
	totem_config->node_id == 0) {

	error_reason = "An IPV6 network requires that a node ID be specified.";
	goto parse_error;
	}

	if (totem_config->interfaces[i].mcast_addr.family != totem_config->interfaces[i].bindnet.family) {
	error_reason = "Multicast address family does not match bind address family";
	goto parse_error;
	}

	if (totem_config->interfaces[i].mcast_addr.family != totem_config->interfaces[i].bindnet.family) {
	error_reason = "Not all bind address belong to the same IP family";
	goto parse_error;
	}
	}

	if (totem_config->version != 2) {
	error_reason = "This totem parser can only parse version 2 configurations.";
	goto parse_error;
	}


	if (totem_config->token_retransmits_before_loss_const == 0) {
	totem_config->token_retransmits_before_loss_const =
	TOKEN_RETRANSMITS_BEFORE_LOSS_CONST;
	}

	/*
	* Setup timeout values that are not setup by user
	*/
	if (totem_config->token_timeout == 0) {
	totem_config->token_timeout = TOKEN_TIMEOUT;
	if (totem_config->token_retransmits_before_loss_const == 0) {
	totem_config->token_retransmits_before_loss_const = TOKEN_RETRANSMITS_BEFORE_LOSS_CONST;
	}

	if (totem_config->token_retransmit_timeout == 0) {
	totem_config->token_retransmit_timeout =
	(int)(totem_config->token_timeout /
	(totem_config->token_retransmits_before_loss_const + 0.2));
	}
	if (totem_config->token_hold_timeout == 0) {
	totem_config->token_hold_timeout =
	(int)(totem_config->token_retransmit_timeout * 0.8 -
	(1000/HZ));
	}
	}

	if (totem_config->max_network_delay == 0) {
	totem_config->max_network_delay = MAX_NETWORK_DELAY;
	}

	if (totem_config->max_network_delay < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The max_network_delay parameter (%d ms) may not be less then (%d ms).",
	totem_config->max_network_delay, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->window_size == 0) {
	totem_config->window_size = WINDOW_SIZE;
	}

	if (totem_config->max_messages == 0) {
	totem_config->max_messages = MAX_MESSAGES;
	}

	if (totem_config->token_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The token timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->token_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->token_retransmit_timeout == 0) {
	totem_config->token_retransmit_timeout =
	(int)(totem_config->token_timeout /
	(totem_config->token_retransmits_before_loss_const + 0.2));
	}
	if (totem_config->token_hold_timeout == 0) {
	totem_config->token_hold_timeout =
	(int)(totem_config->token_retransmit_timeout * 0.8 -
	(1000/HZ));
	}
	if (totem_config->token_retransmit_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The token retransmit timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->token_retransmit_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->token_hold_timeout == 0) {
	totem_config->token_hold_timeout = TOKEN_HOLD_TIMEOUT;
	}

	if (totem_config->token_hold_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The token hold timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->token_hold_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->join_timeout == 0) {
	totem_config->join_timeout = JOIN_TIMEOUT;
	}

	if (totem_config->join_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The join timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->join_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->consensus_timeout == 0) {
	totem_config->consensus_timeout = CONSENSUS_TIMEOUT;
	}

	if (totem_config->consensus_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The consensus timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->consensus_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->merge_timeout == 0) {
	totem_config->merge_timeout = MERGE_TIMEOUT;
	}

	if (totem_config->merge_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The merge timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->merge_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (totem_config->downcheck_timeout == 0) {
	totem_config->downcheck_timeout = DOWNCHECK_TIMEOUT;
	}

	if (totem_config->downcheck_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The downcheck timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->downcheck_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	/*
	* RRP values validation
	*/
	if (strcmp (totem_config->rrp_mode, "none") &&
	strcmp (totem_config->rrp_mode, "active") &&
	strcmp (totem_config->rrp_mode, "passive")) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The RRP mode \"%s\" specified is invalid. It must be none, active, or passive.\n", totem_config->rrp_mode);
	goto parse_error;
	}
	if (totem_config->rrp_problem_count_timeout == 0) {
	totem_config->rrp_problem_count_timeout = RRP_PROBLEM_COUNT_TIMEOUT;
	}
	if (totem_config->rrp_problem_count_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The RRP problem count timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->rrp_problem_count_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}
	if (totem_config->rrp_problem_count_threshold == 0) {
	totem_config->rrp_problem_count_threshold = RRP_PROBLEM_COUNT_THRESHOLD_DEFAULT;
	}
	if (totem_config->rrp_problem_count_threshold < RRP_PROBLEM_COUNT_THRESHOLD_MIN) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The RRP problem count threshold (%d problem count) may not be less then (%d problem count).",
	totem_config->rrp_problem_count_threshold, RRP_PROBLEM_COUNT_THRESHOLD_MIN);
	goto parse_error;
	}
	if (totem_config->rrp_token_expired_timeout == 0) {
	totem_config->rrp_token_expired_timeout =
	totem_config->token_retransmit_timeout;
	}

	if (totem_config->rrp_token_expired_timeout < MINIMUM_TIMEOUT) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The RRP token expired timeout parameter (%d ms) may not be less then (%d ms).",
	totem_config->rrp_token_expired_timeout, MINIMUM_TIMEOUT);
	goto parse_error;
	}

	if (strcmp (totem_config->rrp_mode, "none") == 0) {
	interface_max = 1;
	}
	if (interface_max < totem_config->interface_count) {
	snprintf (parse_error, sizeof(parse_error),
	"%d is too many configured interfaces for the rrp_mode setting %s.",
	totem_config->interface_count,
	totem_config->rrp_mode);
	error_reason = parse_error;
	goto parse_error;
	}


	if (totem_config->fail_to_recv_const == 0) {
	totem_config->fail_to_recv_const = FAIL_TO_RECV_CONST;
	}
	if (totem_config->seqno_unchanged_const == 0) {
	totem_config->seqno_unchanged_const = SEQNO_UNCHANGED_CONST;
	}
	if (totem_config->net_mtu == 0) {
	totem_config->net_mtu = 1500;
	}

	if ((MESSAGE_QUEUE_MAX) < totem_config->max_messages) {
	snprintf (local_error_reason, sizeof(local_error_reason),
	"The max_messages parameter (%d messages) may not be greater then (%d messages).",
	totem_config->max_messages, MESSAGE_QUEUE_MAX);
	goto parse_error;
	}

	if (totem_config->threads > SEND_THREADS_MAX) {
	totem_config->threads = SEND_THREADS_MAX;
	}
	if (totem_config->secauth == 0) {
	totem_config->threads = 0;
	}
	if (totem_config->net_mtu > FRAME_SIZE_MAX) {
	error_reason = "This net_mtu parameter is greater then the maximum frame size";
	goto parse_error;
	}
	if (totem_config->vsf_type == NULL) {
	totem_config->vsf_type = "none";
	}

	return (0);

	parse_error:
	snprintf (error_string_response, sizeof(error_string_response),
	"parse error in config: %s\n", error_reason);
	*error_string = error_string_response;
	return (-1);
	}

	static int read_keyfile (
	const char *key_location,
	struct totem_config *totem_config,
	const char **error_string)
	{
	int fd;
	int res;
	ssize_t expected_key_len = sizeof (totem_config->private_key);
	int saved_errno;

	fd = open (key_location, O_RDONLY);
	if (fd == -1) {
	snprintf (error_string_response, sizeof(error_string_response),
	"Could not open %s: %s\n",
	key_location, strerror (errno));
	goto parse_error;
	}

	res = read (fd, totem_config->private_key, expected_key_len);
	saved_errno = errno;
	close (fd);

	if (res == -1) {
	snprintf (error_string_response, sizeof(error_string_response),
	"Could not read %s: %s\n",
	key_location, strerror (saved_errno));
	goto parse_error;
	}

	totem_config->private_key_len = expected_key_len;

	if (res != expected_key_len) {
	snprintf (error_string_response, sizeof(error_string_response),
	"Could only read %d bits of 1024 bits from %s.\n",
	res * 8, key_location);
	goto parse_error;
	}

	return 0;

	parse_error:
	*error_string = error_string_response;
	return (-1);
	}

	int totem_config_keyread (
	struct objdb_iface_ver0 *objdb,
	struct totem_config *totem_config,
	const char **error_string)
	{
	int got_key = 0;
	const char *key_location = NULL;
	hdb_handle_t object_totem_handle;
	int res;

	memset (totem_config->private_key, 0, 128);
	totem_config->private_key_len = 128;

	if (totem_config->secauth == 0) {
	return (0);
	}

	res = totem_handle_find (objdb, &object_totem_handle);
	if (res == -1) {
	return (-1);
	}
	/* objdb may store the location of the key file */
	if (!objdb_get_string (objdb,object_totem_handle, "keyfile", &key_location)
	&& key_location) {
	res = read_keyfile(key_location, totem_config, error_string);
	if (res) {
	goto key_error;
	}
	got_key = 1;
	} else { /* Or the key itself may be in the objdb */
	char *key = NULL;
	size_t key_len;
	res = objdb->object_key_get (object_totem_handle,
	"key",
	strlen ("key"),
	(void *)&key,
	&key_len);

	if (res == 0 && key) {
	if (key_len > sizeof (totem_config->private_key)) {
	goto key_error;
	}
	memcpy(totem_config->private_key, key, key_len);
	totem_config->private_key_len = key_len;
	got_key = 1;
	}
	}

	/* In desperation we read the default filename */
	if (!got_key) {
	const char *filename = getenv("COROSYNC_TOTEM_AUTHKEY_FILE");
	if (!filename)
	filename = SYSCONFDIR "/ais/authkey";
	res = read_keyfile(filename, totem_config, error_string);
	if (res)
	goto key_error;

	}

	return (0);

	*error_string = error_string_response;
	key_error:
	return (-1);

	}

	static void totem_key_change_notify(object_change_type_t change_type,
	hdb_handle_t parent_object_handle,
	hdb_handle_t object_handle,
	const void *object_name_pt, size_t object_name_len,
	const void *key_name_pt, size_t key_len,
	const void *key_value_pt, size_t key_value_len,
	void *priv_data_pt)
	{
	struct totem_config *totem_config = priv_data_pt;

	if (memcmp(object_name_pt, "totem", object_name_len) == 0)
	totem_volatile_config_read(global_objdb,
	totem_config,
	object_handle); // CHECK
	}

	static void totem_objdb_reload_notify(objdb_reload_notify_type_t type, int flush,
	void *priv_data_pt)
	{
	struct totem_config *totem_config = priv_data_pt;
	hdb_handle_t totem_object_handle;

	/*
	* A new totem {} key might exist, cancel the
	* existing notification at the start of reload,
	* and start a new one on the new object when
	* it's all settled.
	*/

	if (type == OBJDB_RELOAD_NOTIFY_START) {
	global_objdb->object_track_stop(
	totem_key_change_notify,
	NULL,
	NULL,
	NULL,
	NULL);
	}

	if (type == OBJDB_RELOAD_NOTIFY_END \|\|
	type == OBJDB_RELOAD_NOTIFY_FAILED) {


	if (!totem_handle_find(global_objdb,
	&totem_object_handle)) {
	add_totem_config_notification(global_objdb, totem_config, totem_object_handle);

	/*
	* Reload the configuration
	*/
	totem_volatile_config_read(global_objdb,
	totem_config,
	totem_object_handle);

	}
	else {
	log_printf(LOGSYS_LEVEL_ERROR, "totem objdb tracking stopped, cannot find totem{} handle on objdb\n");
	}
	}
	}


	static void add_totem_config_notification(
	struct objdb_iface_ver0 *objdb,
	struct totem_config *totem_config,
	hdb_handle_t totem_object_handle)
	{

	global_objdb = objdb;
	objdb->object_track_start(totem_object_handle,
	1,
	totem_key_change_notify,
	NULL, // object_create_notify,
	NULL, // object_destroy_notify,
	NULL, // object_reload_notify
	totem_config); // priv_data

	/*
	* Reload notify must be on the parent object
	*/
	objdb->object_track_start(OBJECT_PARENT_HANDLE,
	1,
	NULL, // key_change_notify,
	NULL, // object_create_notify,
	NULL, // object_destroy_notify,
	totem_objdb_reload_notify, // object_reload_notify
	totem_config); // priv_data

	}

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