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	diff --git a/daemons/attrd/attrd_commands.c b/daemons/attrd/attrd_commands.c
	index a6678a33bd..b4a6f06b76 100644
	--- a/daemons/attrd/attrd_commands.c
	+++ b/daemons/attrd/attrd_commands.c
	@@ -1,1299 +1,1299 @@
	/*
	* Copyright 2013-2018 Andrew Beekhof <andrew@beekhof.net>
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#include <sys/types.h>
	#include <regex.h>
	#include <glib.h>

	#include <crm/msg_xml.h>
	#include <crm/cluster.h>
	#include <crm/cib.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster/election.h>
	#include <crm/cib/internal.h>

	#include "pacemaker-attrd.h"

	/*
	* Legacy attrd (all pre-1.1.11 Pacemaker versions, plus all versions when used
	* with the no-longer-supported CMAN or corosync-plugin stacks) is unversioned.
	*
	* With atomic attrd, each attrd will send ATTRD_PROTOCOL_VERSION with every
	* peer request and reply. As of Pacemaker 2.0.0, at start-up each attrd will
	* also set a private attribute for itself with its version, so any attrd can
	* determine the minimum version supported by all peers.
	*
	* Protocol Pacemaker Significant changes
	* -------- --------- -------------------
	* 1 1.1.11 ATTRD_OP_UPDATE (F_ATTRD_ATTRIBUTE only),
	* ATTRD_OP_PEER_REMOVE, ATTRD_OP_REFRESH, ATTRD_OP_FLUSH,
	* ATTRD_OP_SYNC, ATTRD_OP_SYNC_RESPONSE
	* 1 1.1.13 ATTRD_OP_UPDATE (with F_ATTR_REGEX), ATTRD_OP_QUERY
	* 1 1.1.15 ATTRD_OP_UPDATE_BOTH, ATTRD_OP_UPDATE_DELAY
	* 2 1.1.17 ATTRD_OP_CLEAR_FAILURE
	*/
	#define ATTRD_PROTOCOL_VERSION "2"

	int last_cib_op_done = 0;
	GHashTable *attributes = NULL;

	void write_attribute(attribute_t *a, bool ignore_delay);
	void write_or_elect_attribute(attribute_t *a);
	void attrd_current_only_attribute_update(crm_node_t peer, xmlNode xml);
	void attrd_peer_update(crm_node_t peer, xmlNode xml, const char *host, bool filter);
	void attrd_peer_sync(crm_node_t peer, xmlNode xml);
	void attrd_peer_remove(const char host, gboolean uncache, const char source);

	static gboolean
	send_attrd_message(crm_node_t * node, xmlNode * data)
	{
	crm_xml_add(data, F_TYPE, T_ATTRD);
	crm_xml_add(data, F_ATTRD_VERSION, ATTRD_PROTOCOL_VERSION);
	attrd_xml_add_writer(data);
	return send_cluster_message(node, crm_msg_attrd, data, TRUE);
	}

	static gboolean
	attribute_timer_cb(gpointer data)
	{
	attribute_t *a = data;
	crm_trace("Dampen interval expired for %s", a->id);
	write_or_elect_attribute(a);
	return FALSE;
	}

	static void
	free_attribute_value(gpointer data)
	{
	attribute_value_t *v = data;

	free(v->nodename);
	free(v->current);
	free(v->requested);
	free(v);
	}

	void
	free_attribute(gpointer data)
	{
	attribute_t *a = data;
	if(a) {
	free(a->id);
	free(a->set);
	free(a->uuid);
	free(a->user);

	mainloop_timer_del(a->timer);
	g_hash_table_destroy(a->values);

	free(a);
	}
	}

	static xmlNode *
	build_attribute_xml(
	xmlNode parent, const char name, const char set, const char uuid, unsigned int timeout_ms, const char *user,
	gboolean is_private, const char peer, uint32_t peerid, const char value, gboolean is_force_write)
	{
	xmlNode *xml = create_xml_node(parent, __FUNCTION__);

	crm_xml_add(xml, F_ATTRD_ATTRIBUTE, name);
	crm_xml_add(xml, F_ATTRD_SET, set);
	crm_xml_add(xml, F_ATTRD_KEY, uuid);
	crm_xml_add(xml, F_ATTRD_USER, user);
	crm_xml_add(xml, F_ATTRD_HOST, peer);
	crm_xml_add_int(xml, F_ATTRD_HOST_ID, peerid);
	crm_xml_add(xml, F_ATTRD_VALUE, value);
	crm_xml_add_int(xml, F_ATTRD_DAMPEN, timeout_ms/1000);
	crm_xml_add_int(xml, F_ATTRD_IS_PRIVATE, is_private);
	crm_xml_add_int(xml, F_ATTRD_IS_FORCE_WRITE, is_force_write);

	return xml;
	}

	static void
	clear_attribute_value_seen(void)
	{
	GHashTableIter aIter;
	GHashTableIter vIter;
	attribute_t *a;
	attribute_value_t *v = NULL;

	g_hash_table_iter_init(&aIter, attributes);
	while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
	g_hash_table_iter_init(&vIter, a->values);
	while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
	v->seen = FALSE;
	crm_trace("Clear seen flag %s[%s] = %s.", a->id, v->nodename, v->current);
	}
	}
	}

	static attribute_t *
	create_attribute(xmlNode *xml)
	{
	int dampen = 0;
	const char *value = crm_element_value(xml, F_ATTRD_DAMPEN);
	attribute_t *a = calloc(1, sizeof(attribute_t));

	a->id = crm_element_value_copy(xml, F_ATTRD_ATTRIBUTE);
	a->set = crm_element_value_copy(xml, F_ATTRD_SET);
	a->uuid = crm_element_value_copy(xml, F_ATTRD_KEY);
	a->values = g_hash_table_new_full(crm_strcase_hash, crm_strcase_equal, NULL, free_attribute_value);

	crm_element_value_int(xml, F_ATTRD_IS_PRIVATE, &a->is_private);

	#if ENABLE_ACL
	a->user = crm_element_value_copy(xml, F_ATTRD_USER);
	crm_trace("Performing all %s operations as user '%s'", a->id, a->user);
	#endif

	if(value) {
	dampen = crm_get_msec(value);
	crm_trace("Created attribute %s with delay %dms (%s)", a->id, dampen, value);
	} else {
	crm_trace("Created attribute %s with no delay", a->id);
	}

	if(dampen > 0) {
	a->timeout_ms = dampen;
	a->timer = mainloop_timer_add(a->id, a->timeout_ms, FALSE, attribute_timer_cb, a);
	} else if (dampen < 0) {
	crm_warn("Ignoring invalid delay %s for attribute %s", value, a->id);
	}

	g_hash_table_replace(attributes, a->id, a);
	return a;
	}

	/*!
	* \internal
	* \brief Respond to a client peer-remove request (i.e. propagate to all peers)
	*
	* \param[in] client_name Name of client that made request (for log messages)
	* \param[in] xml Root of request XML
	*
	* \return void
	*/
	void
	attrd_client_peer_remove(const char client_name, xmlNode xml)
	{
	// Host and ID are not used in combination, rather host has precedence
	const char *host = crm_element_value(xml, F_ATTRD_HOST);
	char *host_alloc = NULL;

	if (host == NULL) {
	- int nodeid;
	+ int nodeid = 0;

	crm_element_value_int(xml, F_ATTRD_HOST_ID, &nodeid);
	if (nodeid > 0) {
	crm_node_t *node = crm_find_peer(nodeid, NULL);
	char *host_alloc = NULL;

	if (node && node->uname) {
	// Use cached name if available
	host = node->uname;
	} else {
	// Otherwise ask cluster layer
	host_alloc = get_node_name(nodeid);
	host = host_alloc;
	}
	crm_xml_add(xml, F_ATTRD_HOST, host);
	}
	}

	if (host) {
	crm_info("Client %s is requesting all values for %s be removed",
	client_name, host);
	send_attrd_message(NULL, xml); /* ends up at attrd_peer_message() */
	free(host_alloc);
	} else {
	crm_info("Ignoring request by client %s to remove all peer values without specifying peer",
	client_name);
	}
	}

	/*!
	* \internal
	* \brief Respond to a client update request
	*
	* \param[in] xml Root of request XML
	*
	* \return void
	*/
	void
	attrd_client_update(xmlNode *xml)
	{
	attribute_t *a = NULL;
	char *host = crm_element_value_copy(xml, F_ATTRD_HOST);
	const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
	const char *value = crm_element_value(xml, F_ATTRD_VALUE);
	const char *regex = crm_element_value(xml, F_ATTRD_REGEX);

	/* If a regex was specified, broadcast a message for each match */
	if ((attr == NULL) && regex) {
	GHashTableIter aIter;
	regex_t *r_patt = calloc(1, sizeof(regex_t));

	crm_debug("Setting %s to %s", regex, value);
	if (regcomp(r_patt, regex, REG_EXTENDED\|REG_NOSUB)) {
	crm_err("Bad regex '%s' for update", regex);

	} else {
	g_hash_table_iter_init(&aIter, attributes);
	while (g_hash_table_iter_next(&aIter, (gpointer *) & attr, NULL)) {
	int status = regexec(r_patt, attr, 0, NULL, 0);

	if (status == 0) {
	crm_trace("Matched %s with %s", attr, regex);
	crm_xml_add(xml, F_ATTRD_ATTRIBUTE, attr);
	send_attrd_message(NULL, xml);
	}
	}
	}

	free(host);
	regfree(r_patt);
	free(r_patt);
	return;

	} else if (attr == NULL) {
	crm_err("Update request did not specify attribute or regular expression");
	free(host);
	return;
	}

	if (host == NULL) {
	crm_trace("Inferring host");
	host = strdup(attrd_cluster->uname);
	crm_xml_add(xml, F_ATTRD_HOST, host);
	crm_xml_add_int(xml, F_ATTRD_HOST_ID, attrd_cluster->nodeid);
	}

	a = g_hash_table_lookup(attributes, attr);

	/* If value was specified using ++ or += notation, expand to real value */
	if (value) {
	if (attrd_value_needs_expansion(value)) {
	int int_value;
	attribute_value_t *v = NULL;

	if (a) {
	v = g_hash_table_lookup(a->values, host);
	}
	int_value = attrd_expand_value(value, (v? v->current : NULL));

	crm_info("Expanded %s=%s to %d", attr, value, int_value);
	crm_xml_add_int(xml, F_ATTRD_VALUE, int_value);

	/* Replacing the value frees the previous memory, so re-query it */
	value = crm_element_value(xml, F_ATTRD_VALUE);
	}
	}

	crm_debug("Broadcasting %s[%s]=%s%s", attr, host, value,
	(attrd_election_won()? " (writer)" : ""));

	free(host);

	send_attrd_message(NULL, xml); /* ends up at attrd_peer_message() */
	}

	/*!
	* \internal
	* \brief Respond to client clear-failure request
	*
	* \param[in] xml Request XML
	*/
	void
	attrd_client_clear_failure(xmlNode *xml)
	{
	#if 0
	/* @TODO Track the minimum supported protocol version across all nodes,
	* then enable this more-efficient code.
	*/
	if (compare_version("2", minimum_protocol_version) <= 0) {
	/* Propagate to all peers (including ourselves).
	* This ends up at attrd_peer_message().
	*/
	send_attrd_message(NULL, xml);
	return;
	}
	#endif

	const char *rsc = crm_element_value(xml, F_ATTRD_RESOURCE);
	const char *op = crm_element_value(xml, F_ATTRD_OPERATION);
	const char *interval_spec = crm_element_value(xml, F_ATTRD_INTERVAL);

	/* Map this to an update */
	crm_xml_add(xml, F_ATTRD_TASK, ATTRD_OP_UPDATE);

	/* Add regular expression matching desired attributes */

	if (rsc) {
	char *pattern;

	if (op == NULL) {
	pattern = crm_strdup_printf(ATTRD_RE_CLEAR_ONE, rsc);

	} else {
	guint interval_ms = crm_parse_interval_spec(interval_spec);

	pattern = crm_strdup_printf(ATTRD_RE_CLEAR_OP,
	rsc, op, interval_ms);
	}

	crm_xml_add(xml, F_ATTRD_REGEX, pattern);
	free(pattern);

	} else {
	crm_xml_add(xml, F_ATTRD_REGEX, ATTRD_RE_CLEAR_ALL);
	}

	/* Make sure attribute and value are not set, so we delete via regex */
	if (crm_element_value(xml, F_ATTRD_ATTRIBUTE)) {
	crm_xml_replace(xml, F_ATTRD_ATTRIBUTE, NULL);
	}
	if (crm_element_value(xml, F_ATTRD_VALUE)) {
	crm_xml_replace(xml, F_ATTRD_VALUE, NULL);
	}

	attrd_client_update(xml);
	}

	/*!
	* \internal
	* \brief Respond to a client refresh request (i.e. write out all attributes)
	*
	* \return void
	*/
	void
	attrd_client_refresh(void)
	{
	crm_info("Updating all attributes");
	write_attributes(TRUE, TRUE);
	}

	/*!
	* \internal
	* \brief Build the XML reply to a client query
	*
	* param[in] attr Name of requested attribute
	* param[in] host Name of requested host (or NULL for all hosts)
	*
	* \return New XML reply
	* \note Caller is responsible for freeing the resulting XML
	*/
	static xmlNode build_query_reply(const char attr, const char *host)
	{
	xmlNode *reply = create_xml_node(NULL, __FUNCTION__);
	attribute_t *a;

	if (reply == NULL) {
	return NULL;
	}
	crm_xml_add(reply, F_TYPE, T_ATTRD);
	crm_xml_add(reply, F_ATTRD_VERSION, ATTRD_PROTOCOL_VERSION);

	/* If desired attribute exists, add its value(s) to the reply */
	a = g_hash_table_lookup(attributes, attr);
	if (a) {
	attribute_value_t *v;
	xmlNode *host_value;

	crm_xml_add(reply, F_ATTRD_ATTRIBUTE, attr);

	/* Allow caller to use "localhost" to refer to local node */
	if (safe_str_eq(host, "localhost")) {
	host = attrd_cluster->uname;
	crm_trace("Mapped localhost to %s", host);
	}

	/* If a specific node was requested, add its value */
	if (host) {
	v = g_hash_table_lookup(a->values, host);
	host_value = create_xml_node(reply, XML_CIB_TAG_NODE);
	if (host_value == NULL) {
	free_xml(reply);
	return NULL;
	}
	crm_xml_add(host_value, F_ATTRD_HOST, host);
	crm_xml_add(host_value, F_ATTRD_VALUE, (v? v->current : NULL));

	/* Otherwise, add all nodes' values */
	} else {
	GHashTableIter iter;

	g_hash_table_iter_init(&iter, a->values);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &v)) {
	host_value = create_xml_node(reply, XML_CIB_TAG_NODE);
	if (host_value == NULL) {
	free_xml(reply);
	return NULL;
	}
	crm_xml_add(host_value, F_ATTRD_HOST, v->nodename);
	crm_xml_add(host_value, F_ATTRD_VALUE, v->current);
	}
	}
	}
	return reply;
	}

	/*!
	* \internal
	* \brief Respond to a client query
	*
	* \param[in] client Who queried us
	* \param[in] query Root of query XML
	*
	* \return void
	*/
	void
	attrd_client_query(crm_client_t client, uint32_t id, uint32_t flags, xmlNode query)
	{
	const char *attr;
	const char *origin = crm_element_value(query, F_ORIG);
	ssize_t rc;
	xmlNode *reply;

	if (origin == NULL) {
	origin = "unknown client";
	}
	crm_debug("Query arrived from %s", origin);

	/* Request must specify attribute name to query */
	attr = crm_element_value(query, F_ATTRD_ATTRIBUTE);
	if (attr == NULL) {
	crm_warn("Ignoring malformed query from %s (no attribute name given)",
	origin);
	return;
	}

	/* Build the XML reply */
	reply = build_query_reply(attr, crm_element_value(query, F_ATTRD_HOST));
	if (reply == NULL) {
	crm_err("Could not respond to query from %s: could not create XML reply",
	origin);
	return;
	}
	crm_log_xml_trace(reply, "Reply");

	/* Send the reply to the client */
	client->request_id = 0;
	if ((rc = crm_ipcs_send(client, id, reply, flags)) < 0) {
	crm_err("Could not respond to query from %s: %s (%lld)",
	origin, pcmk_strerror(-rc), (long long) -rc);
	}
	free_xml(reply);
	}

	/*!
	* \internal
	* \brief Clear failure-related attributes
	*
	* \param[in] peer Peer that sent clear request
	* \param[in] xml Request XML
	*/
	static void
	attrd_peer_clear_failure(crm_node_t peer, xmlNode xml)
	{
	const char *rsc = crm_element_value(xml, F_ATTRD_RESOURCE);
	const char *host = crm_element_value(xml, F_ATTRD_HOST);
	const char *op = crm_element_value(xml, F_ATTRD_OPERATION);
	const char *interval_spec = crm_element_value(xml, F_ATTRD_INTERVAL);
	guint interval_ms = crm_parse_interval_spec(interval_spec);
	char *attr = NULL;
	GHashTableIter iter;
	regex_t regex;

	if (attrd_failure_regex(&regex, rsc, op, interval_ms) != pcmk_ok) {
	crm_info("Ignoring invalid request to clear failures for %s",
	(rsc? rsc : "all resources"));
	return;
	}

	crm_xml_add(xml, F_ATTRD_TASK, ATTRD_OP_UPDATE);

	/* Make sure value is not set, so we delete */
	if (crm_element_value(xml, F_ATTRD_VALUE)) {
	crm_xml_replace(xml, F_ATTRD_VALUE, NULL);
	}

	g_hash_table_iter_init(&iter, attributes);
	while (g_hash_table_iter_next(&iter, (gpointer *) &attr, NULL)) {
	if (regexec(&regex, attr, 0, NULL, 0) == 0) {
	crm_trace("Matched %s when clearing %s",
	attr, (rsc? rsc : "all resources"));
	crm_xml_add(xml, F_ATTRD_ATTRIBUTE, attr);
	attrd_peer_update(peer, xml, host, FALSE);
	}
	}
	regfree(&regex);
	}

	/*!
	\internal
	\brief Broadcast private attribute for local node with protocol version
	*/
	void
	attrd_broadcast_protocol()
	{
	xmlNode *attrd_op = create_xml_node(NULL, __FUNCTION__);

	crm_xml_add(attrd_op, F_TYPE, T_ATTRD);
	crm_xml_add(attrd_op, F_ORIG, crm_system_name);
	crm_xml_add(attrd_op, F_ATTRD_TASK, ATTRD_OP_UPDATE);
	crm_xml_add(attrd_op, F_ATTRD_ATTRIBUTE, CRM_ATTR_PROTOCOL);
	crm_xml_add(attrd_op, F_ATTRD_VALUE, ATTRD_PROTOCOL_VERSION);
	crm_xml_add_int(attrd_op, F_ATTRD_IS_PRIVATE, 1);
	attrd_client_update(attrd_op);
	free_xml(attrd_op);
	}

	void
	attrd_peer_message(crm_node_t peer, xmlNode xml)
	{
	const char *op = crm_element_value(xml, F_ATTRD_TASK);
	const char *election_op = crm_element_value(xml, F_CRM_TASK);
	const char *host = crm_element_value(xml, F_ATTRD_HOST);
	bool peer_won = FALSE;

	if (election_op) {
	attrd_handle_election_op(peer, xml);
	return;
	}

	if (attrd_shutting_down()) {
	/* If we're shutting down, we want to continue responding to election
	* ops as long as we're a cluster member (because our vote may be
	* needed). Ignore all other messages.
	*/
	return;
	}

	peer_won = attrd_check_for_new_writer(peer, xml);

	if (safe_str_eq(op, ATTRD_OP_UPDATE) \|\| safe_str_eq(op, ATTRD_OP_UPDATE_BOTH) \|\| safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
	attrd_peer_update(peer, xml, host, FALSE);

	} else if (safe_str_eq(op, ATTRD_OP_SYNC)) {
	attrd_peer_sync(peer, xml);

	} else if (safe_str_eq(op, ATTRD_OP_PEER_REMOVE)) {
	attrd_peer_remove(host, TRUE, peer->uname);

	} else if (safe_str_eq(op, ATTRD_OP_CLEAR_FAILURE)) {
	/* It is not currently possible to receive this as a peer command,
	* but will be, if we one day enable propagating this operation.
	*/
	attrd_peer_clear_failure(peer, xml);

	} else if (safe_str_eq(op, ATTRD_OP_SYNC_RESPONSE)
	&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
	xmlNode *child = NULL;

	crm_info("Processing %s from %s", op, peer->uname);

	/* Clear the seen flag for attribute processing held only in the own node. */
	if (peer_won) {
	clear_attribute_value_seen();
	}

	for (child = __xml_first_child(xml); child != NULL; child = __xml_next(child)) {
	host = crm_element_value(child, F_ATTRD_HOST);
	attrd_peer_update(peer, child, host, TRUE);
	}

	if (peer_won) {
	/* Synchronize if there is an attribute held only by own node that Writer does not have. */
	attrd_current_only_attribute_update(peer, xml);
	}
	}
	}

	void
	attrd_peer_sync(crm_node_t peer, xmlNode xml)
	{
	GHashTableIter aIter;
	GHashTableIter vIter;

	attribute_t *a = NULL;
	attribute_value_t *v = NULL;
	xmlNode *sync = create_xml_node(NULL, __FUNCTION__);

	crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);

	g_hash_table_iter_init(&aIter, attributes);
	while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
	g_hash_table_iter_init(&vIter, a->values);
	while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
	crm_debug("Syncing %s[%s] = %s to %s", a->id, v->nodename, v->current, peer?peer->uname:"everyone");
	build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, a->is_private,
	v->nodename, v->nodeid, v->current, FALSE);
	}
	}

	crm_debug("Syncing values to %s", peer?peer->uname:"everyone");
	send_attrd_message(peer, sync);
	free_xml(sync);
	}

	/*!
	* \internal
	* \brief Remove all attributes and optionally peer cache entries for a node
	*
	* \param[in] host Name of node to purge
	* \param[in] uncache If TRUE, remove node from peer caches
	* \param[in] source Who requested removal (only used for logging)
	*/
	void
	attrd_peer_remove(const char host, gboolean uncache, const char source)
	{
	attribute_t *a = NULL;
	GHashTableIter aIter;

	CRM_CHECK(host != NULL, return);
	crm_notice("Removing all %s attributes for peer %s", host, source);

	g_hash_table_iter_init(&aIter, attributes);
	while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
	if(g_hash_table_remove(a->values, host)) {
	crm_debug("Removed %s[%s] for peer %s", a->id, host, source);
	}
	}

	if (uncache) {
	crm_remote_peer_cache_remove(host);
	reap_crm_member(0, host);
	}
	}

	/*!
	* \internal
	* \brief Return host's hash table entry (creating one if needed)
	*
	* \param[in] values Hash table of values
	* \param[in] host Name of peer to look up
	* \param[in] xml XML describing the attribute
	*
	* \return Pointer to new or existing hash table entry
	*/
	static attribute_value_t *
	attrd_lookup_or_create_value(GHashTable values, const char host, xmlNode *xml)
	{
	attribute_value_t *v = g_hash_table_lookup(values, host);
	int is_remote = 0;

	crm_element_value_int(xml, F_ATTRD_IS_REMOTE, &is_remote);
	if (is_remote) {
	/* If we previously assumed this node was an unseen cluster node,
	* remove its entry from the cluster peer cache.
	*/
	crm_node_t *dup = crm_find_peer(0, host);

	if (dup && (dup->uuid == NULL)) {
	reap_crm_member(0, host);
	}

	/* Ensure this host is in the remote peer cache */
	CRM_ASSERT(crm_remote_peer_get(host) != NULL);
	}

	if (v == NULL) {
	v = calloc(1, sizeof(attribute_value_t));
	CRM_ASSERT(v != NULL);

	v->nodename = strdup(host);
	CRM_ASSERT(v->nodename != NULL);

	v->is_remote = is_remote;
	g_hash_table_replace(values, v->nodename, v);
	}
	return(v);
	}

	void
	attrd_current_only_attribute_update(crm_node_t peer, xmlNode xml)
	{
	GHashTableIter aIter;
	GHashTableIter vIter;
	attribute_t *a;
	attribute_value_t *v = NULL;
	xmlNode *sync = create_xml_node(NULL, __FUNCTION__);
	gboolean build = FALSE;

	crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);

	g_hash_table_iter_init(&aIter, attributes);
	while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
	g_hash_table_iter_init(&vIter, a->values);
	while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
	if (safe_str_eq(v->nodename, attrd_cluster->uname) && v->seen == FALSE) {
	crm_trace("Syncing %s[%s] = %s to everyone.(from local only attributes)", a->id, v->nodename, v->current);

	build = TRUE;
	build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, a->is_private,
	v->nodename, v->nodeid, v->current, (a->timeout_ms && a->timer ? TRUE : FALSE));
	} else {
	crm_trace("Local attribute(%s[%s] = %s) was ignore.(another host) : [%s]", a->id, v->nodename, v->current, attrd_cluster->uname);
	continue;
	}
	}
	}

	if (build) {
	crm_debug("Syncing values to everyone.(from local only attributes)");
	send_attrd_message(NULL, sync);
	}
	free_xml(sync);
	}

	void
	attrd_peer_update(crm_node_t peer, xmlNode xml, const char *host, bool filter)
	{
	bool update_both = FALSE;
	attribute_t *a;
	attribute_value_t *v = NULL;
	gboolean is_force_write = FALSE;

	const char *op = crm_element_value(xml, F_ATTRD_TASK);
	const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
	const char *value = crm_element_value(xml, F_ATTRD_VALUE);
	crm_element_value_int(xml, F_ATTRD_IS_FORCE_WRITE, &is_force_write);

	if (attr == NULL) {
	crm_warn("Could not update attribute: peer did not specify name");
	return;
	}

	update_both = ((op == NULL) // ATTRD_OP_SYNC_RESPONSE has no F_ATTRD_TASK
	\|\| safe_str_eq(op, ATTRD_OP_UPDATE_BOTH));

	// Look up or create attribute entry
	a = g_hash_table_lookup(attributes, attr);
	if (a == NULL) {
	if (update_both \|\| safe_str_eq(op, ATTRD_OP_UPDATE)) {
	a = create_attribute(xml);
	} else {
	crm_warn("Could not update %s: attribute not found", attr);
	return;
	}
	}

	// Update attribute dampening
	if (update_both \|\| safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
	const char *dvalue = crm_element_value(xml, F_ATTRD_DAMPEN);
	int dampen = 0;

	if (dvalue == NULL) {
	crm_warn("Could not update %s: peer did not specify value for delay",
	attr);
	return;
	}

	dampen = crm_get_msec(dvalue);
	if (dampen < 0) {
	crm_warn("Could not update %s: invalid delay value %dms (%s)",
	attr, dampen, dvalue);
	return;
	}

	if (a->timeout_ms != dampen) {
	mainloop_timer_del(a->timer);
	a->timeout_ms = dampen;
	if (dampen > 0) {
	a->timer = mainloop_timer_add(attr, a->timeout_ms, FALSE,
	attribute_timer_cb, a);
	crm_info("Update attribute %s delay to %dms (%s)",
	attr, dampen, dvalue);
	} else {
	a->timer = NULL;
	crm_info("Update attribute %s to remove delay", attr);
	}

	/* If dampening changed, do an immediate write-out,
	* otherwise repeated dampening changes would prevent write-outs
	*/
	write_or_elect_attribute(a);
	}

	if (!update_both) {
	return;
	}
	}

	// If no host was specified, update all hosts recursively
	if (host == NULL) {
	GHashTableIter vIter;

	crm_debug("Setting %s for all hosts to %s", attr, value);
	xml_remove_prop(xml, F_ATTRD_HOST_ID);
	g_hash_table_iter_init(&vIter, a->values);
	while (g_hash_table_iter_next(&vIter, (gpointer *) & host, NULL)) {
	attrd_peer_update(peer, xml, host, filter);
	}
	return;
	}

	// Update attribute value for one host

	v = attrd_lookup_or_create_value(a->values, host, xml);

	if (filter && safe_str_neq(v->current, value)
	&& safe_str_eq(host, attrd_cluster->uname)) {

	xmlNode *sync = create_xml_node(NULL, __FUNCTION__);

	crm_notice("%s[%s]: local value '%s' takes priority over '%s' from %s",
	attr, host, v->current, value, peer->uname);

	crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);
	v = g_hash_table_lookup(a->values, host);
	build_attribute_xml(sync, attr, a->set, a->uuid, a->timeout_ms, a->user,
	a->is_private, v->nodename, v->nodeid, v->current, FALSE);

	attrd_xml_add_writer(sync);

	/* Broadcast in case any other nodes had the inconsistent value */
	send_attrd_message(NULL, sync);
	free_xml(sync);

	} else if (safe_str_neq(v->current, value)) {
	crm_notice("Setting %s[%s]: %s -> %s " CRM_XS " from %s",
	attr, host, v->current? v->current : "(unset)", value? value : "(unset)", peer->uname);
	free(v->current);
	v->current = (value? strdup(value) : NULL);
	a->changed = TRUE;

	// Write out new value or start dampening timer
	if (a->timeout_ms && a->timer) {
	crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, attr);
	mainloop_timer_start(a->timer);
	} else {
	write_or_elect_attribute(a);
	}

	} else {
	if (is_force_write && a->timeout_ms && a->timer) {
	/* Save forced writing and set change flag. */
	/* The actual attribute is written by Writer after election. */
	crm_trace("Unchanged %s[%s] from %s is %s(Set the forced write flag)", attr, host, peer->uname, value);
	a->force_write = TRUE;
	} else {
	crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
	}
	}

	/* Set the seen flag for attribute processing held only in the own node. */
	v->seen = TRUE;

	/* If this is a cluster node whose node ID we are learning, remember it */
	if ((v->nodeid == 0) && (v->is_remote == FALSE)
	&& (crm_element_value_int(xml, F_ATTRD_HOST_ID, (int*)&v->nodeid) == 0)) {

	crm_node_t *known_peer = crm_get_peer(v->nodeid, host);

	crm_trace("Learned %s has node id %s",
	known_peer->uname, known_peer->uuid);
	if (attrd_election_won()) {
	write_attributes(FALSE, FALSE);
	}
	}
	}

	void
	write_or_elect_attribute(attribute_t *a)
	{
	if (attrd_election_won()) {
	write_attribute(a, FALSE);
	} else {
	attrd_start_election_if_needed();
	}
	}

	gboolean
	attrd_election_cb(gpointer user_data)
	{
	attrd_declare_winner();

	/* Update the peers after an election */
	attrd_peer_sync(NULL, NULL);

	/* Update the CIB after an election */
	write_attributes(TRUE, FALSE);
	return FALSE;
	}


	void
	attrd_peer_change_cb(enum crm_status_type kind, crm_node_t peer, const void data)
	{
	bool remove_voter = FALSE;

	switch (kind) {
	case crm_status_uname:
	break;

	case crm_status_processes:
	if (is_not_set(peer->processes, crm_get_cluster_proc())) {
	remove_voter = TRUE;
	}
	break;

	case crm_status_nstate:
	if (safe_str_eq(peer->state, CRM_NODE_MEMBER)) {
	/* If we're the writer, send new peers a list of all attributes
	* (unless it's a remote node, which doesn't run its own attrd)
	*/
	if (attrd_election_won()
	&& !is_set(peer->flags, crm_remote_node)) {
	attrd_peer_sync(peer, NULL);
	}
	} else {
	// Remove all attribute values associated with lost nodes
	attrd_peer_remove(peer->uname, FALSE, "loss");
	remove_voter = TRUE;
	}
	break;
	}

	// In case an election is in progress, remove any vote by the node
	if (remove_voter) {
	attrd_remove_voter(peer);
	}
	}

	static void
	attrd_cib_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
	{
	int level = LOG_ERR;
	GHashTableIter iter;
	const char *peer = NULL;
	attribute_value_t *v = NULL;

	char *name = user_data;
	attribute_t *a = g_hash_table_lookup(attributes, name);

	if(a == NULL) {
	crm_info("Attribute %s no longer exists", name);
	return;
	}

	a->update = 0;
	if (rc == pcmk_ok && call_id < 0) {
	rc = call_id;
	}

	switch (rc) {
	case pcmk_ok:
	level = LOG_INFO;
	last_cib_op_done = call_id;
	if (a->timer && !a->timeout_ms) {
	// Remove temporary dampening for failed writes
	mainloop_timer_del(a->timer);
	a->timer = NULL;
	}
	break;

	case -pcmk_err_diff_failed: /* When an attr changes while the CIB is syncing */
	case -ETIME: /* When an attr changes while there is a DC election */
	case -ENXIO: /* When an attr changes while the CIB is syncing a
	* newer config from a node that just came up
	*/
	level = LOG_WARNING;
	break;
	}

	do_crm_log(level, "CIB update %d result for %s: %s " CRM_XS " rc=%d",
	call_id, a->id, pcmk_strerror(rc), rc);

	g_hash_table_iter_init(&iter, a->values);
	while (g_hash_table_iter_next(&iter, (gpointer ) & peer, (gpointer ) & v)) {
	do_crm_log(level, "* %s[%s]=%s", a->id, peer, v->requested);
	free(v->requested);
	v->requested = NULL;
	if (rc != pcmk_ok) {
	a->changed = TRUE; /* Attempt write out again */
	}
	}

	if (a->changed && attrd_election_won()) {
	if (rc == pcmk_ok) {
	/* We deferred a write of a new update because this update was in
	* progress. Write out the new value without additional delay.
	*/
	write_attribute(a, FALSE);

	/* We're re-attempting a write because the original failed; delay
	* the next attempt so we don't potentially flood the CIB manager
	* and logs with a zillion attempts per second.
	*
	* @TODO We could elect a new writer instead. However, we'd have to
	* somehow downgrade our vote, and we'd still need something like this
	* if all peers similarly fail to write this attribute (which may
	* indicate a corrupted attribute entry rather than a CIB issue).
	*/
	} else if (a->timer) {
	// Attribute has a dampening value, so use that as delay
	if (!mainloop_timer_running(a->timer)) {
	crm_trace("Delayed re-attempted write (%dms) for %s",
	a->timeout_ms, name);
	mainloop_timer_start(a->timer);
	}
	} else {
	/* Set a temporary dampening of 2 seconds (timer will continue
	* to exist until the attribute's dampening gets set or the
	* write succeeds).
	*/
	a->timer = mainloop_timer_add(a->id, 2000, FALSE,
	attribute_timer_cb, a);
	mainloop_timer_start(a->timer);
	}
	}
	}

	void
	write_attributes(bool all, bool ignore_delay)
	{
	GHashTableIter iter;
	attribute_t *a = NULL;

	crm_debug("Writing out %s attributes", all? "all" : "changed");
	g_hash_table_iter_init(&iter, attributes);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & a)) {
	if (!all && a->unknown_peer_uuids) {
	// Try writing this attribute again, in case peer ID was learned
	a->changed = TRUE;
	} else if (a->force_write) {
	/* If the force_write flag is set, write the attribute. */
	a->changed = TRUE;
	}

	if(all \|\| a->changed) {
	/* When forced write flag is set, ignore delay. */
	write_attribute(a, (a->force_write ? TRUE : ignore_delay));
	} else {
	crm_trace("Skipping unchanged attribute %s", a->id);
	}
	}
	}

	static void
	build_update_element(xmlNode parent, attribute_t a, const char nodeid, const char value)
	{
	const char *set = NULL;
	xmlNode *xml_obj = NULL;

	xml_obj = create_xml_node(parent, XML_CIB_TAG_STATE);
	crm_xml_add(xml_obj, XML_ATTR_ID, nodeid);

	xml_obj = create_xml_node(xml_obj, XML_TAG_TRANSIENT_NODEATTRS);
	crm_xml_add(xml_obj, XML_ATTR_ID, nodeid);

	xml_obj = create_xml_node(xml_obj, XML_TAG_ATTR_SETS);
	if (a->set) {
	crm_xml_set_id(xml_obj, "%s", a->set);
	} else {
	crm_xml_set_id(xml_obj, "%s-%s", XML_CIB_TAG_STATUS, nodeid);
	}
	set = ID(xml_obj);

	xml_obj = create_xml_node(xml_obj, XML_CIB_TAG_NVPAIR);
	if (a->uuid) {
	crm_xml_set_id(xml_obj, "%s", a->uuid);
	} else {
	crm_xml_set_id(xml_obj, "%s-%s", set, a->id);
	}
	crm_xml_add(xml_obj, XML_NVPAIR_ATTR_NAME, a->id);

	if(value) {
	crm_xml_add(xml_obj, XML_NVPAIR_ATTR_VALUE, value);

	} else {
	crm_xml_add(xml_obj, XML_NVPAIR_ATTR_VALUE, "");
	crm_xml_add(xml_obj, "__delete__", XML_NVPAIR_ATTR_VALUE);
	}
	}

	static void
	set_alert_attribute_value(GHashTable t, attribute_value_t v)
	{
	attribute_value_t *a_v = NULL;
	a_v = calloc(1, sizeof(attribute_value_t));
	CRM_ASSERT(a_v != NULL);

	a_v->nodeid = v->nodeid;
	a_v->nodename = strdup(v->nodename);

	if (v->current != NULL) {
	a_v->current = strdup(v->current);
	}

	g_hash_table_replace(t, a_v->nodename, a_v);
	}

	static void
	send_alert_attributes_value(attribute_t a, GHashTable t)
	{
	int rc = 0;
	attribute_value_t *at = NULL;
	GHashTableIter vIter;

	g_hash_table_iter_init(&vIter, t);

	while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & at)) {
	rc = attrd_send_attribute_alert(at->nodename, at->nodeid,
	a->id, at->current);
	crm_trace("Sent alerts for %s[%s]=%s: nodeid=%d rc=%d",
	a->id, at->nodename, at->current, at->nodeid, rc);
	}
	}

	#define s_if_plural(i) (((i) == 1)? "" : "s")

	void
	write_attribute(attribute_t *a, bool ignore_delay)
	{
	int private_updates = 0, cib_updates = 0;
	xmlNode *xml_top = NULL;
	attribute_value_t *v = NULL;
	GHashTableIter iter;
	enum cib_call_options flags = cib_quorum_override;
	GHashTable *alert_attribute_value = NULL;

	if (a == NULL) {
	return;
	}

	/* If this attribute will be written to the CIB ... */
	if (!a->is_private) {

	/* Defer the write if now's not a good time */
	CRM_CHECK(the_cib != NULL, return);
	if (a->update && (a->update < last_cib_op_done)) {
	crm_info("Write out of '%s' continuing: update %d considered lost", a->id, a->update);
	a->update = 0; // Don't log this message again

	} else if (a->update) {
	crm_info("Write out of '%s' delayed: update %d in progress", a->id, a->update);
	return;

	} else if (mainloop_timer_running(a->timer)) {
	if (ignore_delay) {
	/* 'refresh' forces a write of the current value of all attributes
	* Cancel any existing timers, we're writing it NOW
	*/
	mainloop_timer_stop(a->timer);
	crm_debug("Write out of '%s': timer is running but ignore delay", a->id);
	} else {
	crm_info("Write out of '%s' delayed: timer is running", a->id);
	return;
	}
	}

	/* Initialize the status update XML */
	xml_top = create_xml_node(NULL, XML_CIB_TAG_STATUS);
	}

	/* Attribute will be written shortly, so clear changed flag */
	a->changed = FALSE;

	/* We will check all peers' uuids shortly, so initialize this to false */
	a->unknown_peer_uuids = FALSE;

	/* Attribute will be written shortly, so clear forced write flag */
	a->force_write = FALSE;

	/* Make the table for the attribute trap */
	alert_attribute_value = g_hash_table_new_full(crm_strcase_hash,
	crm_strcase_equal, NULL,
	free_attribute_value);

	/* Iterate over each peer value of this attribute */
	g_hash_table_iter_init(&iter, a->values);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & v)) {
	crm_node_t *peer = crm_get_peer_full(v->nodeid, v->nodename, CRM_GET_PEER_ANY);

	/* If the value's peer info does not correspond to a peer, ignore it */
	if (peer == NULL) {
	crm_notice("Cannot update %s[%s]=%s because peer not known",
	a->id, v->nodename, v->current);
	continue;
	}

	/* If we're just learning the peer's node id, remember it */
	if (peer->id && (v->nodeid == 0)) {
	crm_trace("Learned ID %u for node %s", peer->id, v->nodename);
	v->nodeid = peer->id;
	}

	/* If this is a private attribute, no update needs to be sent */
	if (a->is_private) {
	private_updates++;
	continue;
	}

	/* If the peer is found, but its uuid is unknown, defer write */
	if (peer->uuid == NULL) {
	a->unknown_peer_uuids = TRUE;
	crm_notice("Cannot update %s[%s]=%s because peer UUID not known "
	"(will retry if learned)",
	a->id, v->nodename, v->current);
	continue;
	}

	/* Add this value to status update XML */
	crm_debug("Updating %s[%s]=%s (peer known as %s, UUID %s, ID %u/%u)",
	a->id, v->nodename, v->current,
	peer->uname, peer->uuid, peer->id, v->nodeid);
	build_update_element(xml_top, a, peer->uuid, v->current);
	cib_updates++;

	/* Preservation of the attribute to transmit alert */
	set_alert_attribute_value(alert_attribute_value, v);

	free(v->requested);
	v->requested = NULL;
	if (v->current) {
	v->requested = strdup(v->current);
	} else {
	/* Older attrd versions don't know about the cib_mixed_update
	* flag so make sure it goes to the local cib which does
	*/
	flags \|= cib_mixed_update\|cib_scope_local;
	}
	}

	if (private_updates) {
	crm_info("Processed %d private change%s for %s, id=%s, set=%s",
	private_updates, s_if_plural(private_updates),
	a->id, (a->uuid? a->uuid : "n/a"), (a->set? a->set : "n/a"));
	}
	if (cib_updates) {
	crm_log_xml_trace(xml_top, __FUNCTION__);

	a->update = cib_internal_op(the_cib, CIB_OP_MODIFY, NULL, XML_CIB_TAG_STATUS, xml_top, NULL,
	flags, a->user);

	crm_info("Sent CIB request %d with %d change%s for %s (id %s, set %s)",
	a->update, cib_updates, s_if_plural(cib_updates),
	a->id, (a->uuid? a->uuid : "n/a"), (a->set? a->set : "n/a"));

	the_cib->cmds->register_callback_full(the_cib, a->update,
	CIB_OP_TIMEOUT_S, FALSE,
	strdup(a->id),
	"attrd_cib_callback",
	attrd_cib_callback, free);
	/* Transmit alert of the attribute */
	send_alert_attributes_value(a, alert_attribute_value);
	}

	g_hash_table_destroy(alert_attribute_value);
	free_xml(xml_top);
	}

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