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	diff --git a/daemons/attrd/Makefile.am b/daemons/attrd/Makefile.am
	index 36abde56b9..bab2124b54 100644
	--- a/daemons/attrd/Makefile.am
	+++ b/daemons/attrd/Makefile.am
	@@ -1,44 +1,45 @@
	#
	# Copyright 2004-2022 the Pacemaker project contributors
	#
	# The version control history for this file may have further details.
	#
	# This source code is licensed under the GNU General Public License version 2
	# or later (GPLv2+) WITHOUT ANY WARRANTY.
	#

	include $(top_srcdir)/mk/common.mk

	halibdir = $(CRM_DAEMON_DIR)

	halib_PROGRAMS = pacemaker-attrd

	noinst_HEADERS = pacemaker-attrd.h

	pacemaker_attrd_CFLAGS = $(CFLAGS_HARDENED_EXE)
	pacemaker_attrd_LDFLAGS = $(LDFLAGS_HARDENED_EXE)

	pacemaker_attrd_LDADD = $(top_builddir)/lib/cluster/libcrmcluster.la \
	$(top_builddir)/lib/pengine/libpe_rules.la \
	$(top_builddir)/lib/common/libcrmcommon.la \
	$(top_builddir)/lib/cib/libcib.la \
	$(top_builddir)/lib/lrmd/liblrmd.la \
	$(CLUSTERLIBS)

	pacemaker_attrd_SOURCES = attrd_alerts.c \
	attrd_commands.c \
	+ attrd_corosync.c \
	attrd_elections.c \
	attrd_ipc.c \
	attrd_utils.c \
	pacemaker-attrd.c

	clean-generic:
	rm -f .log .debug .xml ~

	if BUILD_LEGACY_LINKS
	install-exec-hook:
	cd $(DESTDIR)$(CRM_DAEMON_DIR) && rm -f attrd && $(LN_S) pacemaker-attrd attrd

	uninstall-hook:
	cd $(DESTDIR)$(CRM_DAEMON_DIR) && rm -f attrd
	endif
	diff --git a/daemons/attrd/attrd_commands.c b/daemons/attrd/attrd_commands.c
	index a0d7c2221f..a327dc25ad 100644
	--- a/daemons/attrd/attrd_commands.c
	+++ b/daemons/attrd/attrd_commands.c
	@@ -1,1472 +1,1419 @@
	/*
	* Copyright 2013-2022 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* 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/common/xml_internal.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster/election_internal.h>
	#include <crm/cib/internal.h>

	#include "pacemaker-attrd.h"

	static int minimum_protocol_version = -1;

	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_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, bool uncache, const char source);

	static void broadcast_unseen_local_values(crm_node_t peer, xmlNode xml);

	static gboolean
	send_attrd_message(crm_node_t * node, xmlNode * data)
	{
	crm_xml_add(data, F_TYPE, T_ATTRD);
	crm_xml_add(data, PCMK__XA_ATTR_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);
	}
	}

	/*!
	* \internal
	* \brief Ensure a Pacemaker Remote node is in the correct peer cache
	*
	* \param[in]
	*/
	static void
	cache_remote_node(const char *node_name)
	{
	/* If we previously assumed this node was an unseen cluster node,
	* remove its entry from the cluster peer cache.
	*/
	crm_node_t *dup = pcmk__search_cluster_node_cache(0, node_name);

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

	// Ensure node is in the remote peer cache
	CRM_ASSERT(crm_remote_peer_get(node_name) != NULL);
	}

	/*!
	* \internal
	* \brief Create an XML representation of an attribute for use in peer messages
	*
	* \param[in] parent Create attribute XML as child element of this element
	* \param[in] a Attribute to represent
	* \param[in] v Attribute value to represent
	* \param[in] force_write If true, value should be written even if unchanged
	*
	* \return XML representation of attribute
	*/
	static xmlNode *
	add_attribute_value_xml(xmlNode parent, attribute_t a, attribute_value_t *v,
	bool force_write)
	{
	xmlNode *xml = create_xml_node(parent, __func__);

	crm_xml_add(xml, PCMK__XA_ATTR_NAME, a->id);
	crm_xml_add(xml, PCMK__XA_ATTR_SET, a->set);
	crm_xml_add(xml, PCMK__XA_ATTR_UUID, a->uuid);
	crm_xml_add(xml, PCMK__XA_ATTR_USER, a->user);
	crm_xml_add(xml, PCMK__XA_ATTR_NODE_NAME, v->nodename);
	if (v->nodeid > 0) {
	crm_xml_add_int(xml, PCMK__XA_ATTR_NODE_ID, v->nodeid);
	}
	if (v->is_remote != 0) {
	crm_xml_add_int(xml, PCMK__XA_ATTR_IS_REMOTE, 1);
	}
	crm_xml_add(xml, PCMK__XA_ATTR_VALUE, v->current);
	crm_xml_add_int(xml, PCMK__XA_ATTR_DAMPENING, a->timeout_ms / 1000);
	crm_xml_add_int(xml, PCMK__XA_ATTR_IS_PRIVATE, a->is_private);
	crm_xml_add_int(xml, PCMK__XA_ATTR_FORCE, 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, PCMK__XA_ATTR_DAMPENING);
	attribute_t *a = calloc(1, sizeof(attribute_t));

	a->id = crm_element_value_copy(xml, PCMK__XA_ATTR_NAME);
	a->set = crm_element_value_copy(xml, PCMK__XA_ATTR_SET);
	a->uuid = crm_element_value_copy(xml, PCMK__XA_ATTR_UUID);
	a->values = pcmk__strikey_table(NULL, free_attribute_value);

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

	a->user = crm_element_value_copy(xml, PCMK__XA_ATTR_USER);
	crm_trace("Performing all %s operations as user '%s'", a->id, a->user);

	if (value != NULL) {
	dampen = crm_get_msec(value);
	}
	crm_trace("Created attribute %s with %s write delay", a->id,
	(a->timeout_ms == 0)? "no" : pcmk__readable_interval(a->timeout_ms));

	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(pcmk__client_t client, xmlNode xml)
	{
	// Host and ID are not used in combination, rather host has precedence
	const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
	char *host_alloc = NULL;

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

	crm_element_value_int(xml, PCMK__XA_ATTR_NODE_ID, &nodeid);
	if (nodeid > 0) {
	crm_node_t *node = pcmk__search_cluster_node_cache(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, PCMK__XA_ATTR_NODE_NAME, host);
	}
	}

	if (host) {
	crm_info("Client %s is requesting all values for %s be removed",
	pcmk__client_name(client), 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",
	pcmk__client_name(client));
	}
	}

	/*!
	* \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;
	const char attr, value, *regex;

	/* If the message has children, that means it is a message from a newer
	* client that supports sending multiple operations at a time. There are
	* two ways we can handle that.
	*/
	if (xml_has_children(xml)) {
	if (minimum_protocol_version >= 4) {
	/* First, if all peers support a certain protocol version, we can
	* just broadcast the big message and they'll handle it.
	*/
	send_attrd_message(NULL, xml);
	} else {
	/* Second, if they do not support that protocol version, split it
	* up into individual messages and call attrd_client_update on
	* each one.
	*/
	for (xmlNode *child = first_named_child(xml, XML_ATTR_OP); child != NULL;
	child = crm_next_same_xml(child)) {
	attrd_client_update(child);
	}
	}

	return;
	}

	host = crm_element_value_copy(xml, PCMK__XA_ATTR_NODE_NAME);
	attr = crm_element_value(xml, PCMK__XA_ATTR_NAME);
	value = crm_element_value(xml, PCMK__XA_ATTR_VALUE);
	regex = crm_element_value(xml, PCMK__XA_ATTR_PATTERN);

	/* 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, PCMK__XA_ATTR_NAME, 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, PCMK__XA_ATTR_NODE_NAME, host);
	crm_xml_add_int(xml, PCMK__XA_ATTR_NODE_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, PCMK__XA_ATTR_VALUE, int_value);

	/* Replacing the value frees the previous memory, so re-query it */
	value = crm_element_value(xml, PCMK__XA_ATTR_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)
	{
	const char rsc, op, *interval_spec;

	if (minimum_protocol_version >= 2) {
	/* Propagate to all peers (including ourselves).
	* This ends up at attrd_peer_message().
	*/
	send_attrd_message(NULL, xml);
	return;
	}

	rsc = crm_element_value(xml, PCMK__XA_ATTR_RESOURCE);
	op = crm_element_value(xml, PCMK__XA_ATTR_OPERATION);
	interval_spec = crm_element_value(xml, PCMK__XA_ATTR_INTERVAL);

	/* Map this to an update */
	crm_xml_add(xml, PCMK__XA_TASK, PCMK__ATTRD_CMD_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, PCMK__XA_ATTR_PATTERN, pattern);
	free(pattern);

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

	/* Make sure attribute and value are not set, so we delete via regex */
	if (crm_element_value(xml, PCMK__XA_ATTR_NAME)) {
	crm_xml_replace(xml, PCMK__XA_ATTR_NAME, NULL);
	}
	if (crm_element_value(xml, PCMK__XA_ATTR_VALUE)) {
	crm_xml_replace(xml, PCMK__XA_ATTR_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, __func__);
	attribute_t *a;

	if (reply == NULL) {
	return NULL;
	}
	crm_xml_add(reply, F_TYPE, T_ATTRD);
	crm_xml_add(reply, F_SUBTYPE, PCMK__ATTRD_CMD_QUERY);
	crm_xml_add(reply, PCMK__XA_ATTR_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, PCMK__XA_ATTR_NAME, attr);

	/* Allow caller to use "localhost" to refer to local node */
	if (pcmk__str_eq(host, "localhost", pcmk__str_casei)) {
	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, PCMK__XA_ATTR_NODE_NAME, host);
	crm_xml_add(host_value, PCMK__XA_ATTR_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, PCMK__XA_ATTR_NODE_NAME, v->nodename);
	crm_xml_add(host_value, PCMK__XA_ATTR_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(pcmk__client_t *client, uint32_t id, uint32_t flags,
	xmlNode *query)
	{
	const char *attr;
	const char *origin = crm_element_value(query, F_ORIG);
	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, PCMK__XA_ATTR_NAME);
	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,
	PCMK__XA_ATTR_NODE_NAME));
	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;
	{
	int rc = pcmk__ipc_send_xml(client, id, reply, flags);

	if (rc != pcmk_rc_ok) {
	crm_err("Could not respond to query from %s: %s " CRM_XS " rc=%d",
	origin, pcmk_rc_str(rc), 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
	+void
	attrd_peer_clear_failure(crm_node_t peer, xmlNode xml)
	{
	const char *rsc = crm_element_value(xml, PCMK__XA_ATTR_RESOURCE);
	const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
	const char *op = crm_element_value(xml, PCMK__XA_ATTR_OPERATION);
	const char *interval_spec = crm_element_value(xml, PCMK__XA_ATTR_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",
	pcmk__s(rsc, "all resources"));
	return;
	}

	crm_xml_add(xml, PCMK__XA_TASK, PCMK__ATTRD_CMD_UPDATE);

	/* Make sure value is not set, so we delete */
	if (crm_element_value(xml, PCMK__XA_ATTR_VALUE)) {
	crm_xml_replace(xml, PCMK__XA_ATTR_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, pcmk__s(rsc, "all resources"));
	crm_xml_add(xml, PCMK__XA_ATTR_NAME, attr);
	attrd_peer_update(peer, xml, host, false);
	}
	}
	regfree(&regex);
	}

	/*!
	* \internal
	* \brief Load attributes from a peer sync response
	*
	* \param[in] peer Peer that sent clear request
	* \param[in] peer_won Whether peer is the attribute writer
	* \param[in] xml Request XML
	*/
	-static void
	-process_peer_sync_response(crm_node_t peer, bool peer_won, xmlNode xml)
	+void
	+attrd_peer_sync_response(crm_node_t peer, bool peer_won, xmlNode xml)
	{
	crm_info("Processing " PCMK__ATTRD_CMD_SYNC_RESPONSE " from %s",
	peer->uname);

	if (peer_won) {
	/* Initialize the "seen" flag for all attributes to cleared, so we can
	* detect attributes that local node has but the writer doesn't.
	*/
	clear_attribute_value_seen();
	}

	// Process each attribute update in the sync response
	for (xmlNode *child = pcmk__xml_first_child(xml); child != NULL;
	child = pcmk__xml_next(child)) {
	attrd_peer_update(peer, child,
	crm_element_value(child, PCMK__XA_ATTR_NODE_NAME),
	true);
	}

	if (peer_won) {
	/* If any attributes are still not marked as seen, the writer doesn't
	* know about them, so send all peers an update with them.
	*/
	broadcast_unseen_local_values(peer, xml);
	}
	}

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

	crm_xml_add(attrd_op, F_TYPE, T_ATTRD);
	crm_xml_add(attrd_op, F_ORIG, crm_system_name);
	crm_xml_add(attrd_op, PCMK__XA_TASK, PCMK__ATTRD_CMD_UPDATE);
	crm_xml_add(attrd_op, PCMK__XA_ATTR_NAME, CRM_ATTR_PROTOCOL);
	crm_xml_add(attrd_op, PCMK__XA_ATTR_VALUE, ATTRD_PROTOCOL_VERSION);
	crm_xml_add_int(attrd_op, PCMK__XA_ATTR_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, PCMK__XA_TASK);
	- const char *election_op = crm_element_value(xml, F_CRM_TASK);
	- const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
	- 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 (pcmk__str_any_of(op, PCMK__ATTRD_CMD_UPDATE, PCMK__ATTRD_CMD_UPDATE_BOTH,
	- PCMK__ATTRD_CMD_UPDATE_DELAY, NULL)) {
	- attrd_peer_update(peer, xml, host, false);
	-
	- } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_SYNC, pcmk__str_none)) {
	- attrd_peer_sync(peer, xml);
	-
	- } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_PEER_REMOVE, pcmk__str_none)) {
	- attrd_peer_remove(host, true, peer->uname);
	-
	- } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_CLEAR_FAILURE, pcmk__str_none)) {
	- /* 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 (pcmk__str_eq(op, PCMK__ATTRD_CMD_SYNC_RESPONSE, pcmk__str_none)
	- && !pcmk__str_eq(peer->uname, attrd_cluster->uname, pcmk__str_casei)) {
	- process_peer_sync_response(peer, peer_won, xml);
	-
	- } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_FLUSH, pcmk__str_none)) {
	- /* Ignore. The flush command was removed in 2.0.0 but may be
	- * received from peers running older versions.
	- */
	- }
	-}
	-
	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, __func__);

	crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_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");
	add_attribute_value_xml(sync, a, v, 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, bool 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, PCMK__XA_ATTR_IS_REMOTE, &is_remote);
	if (is_remote) {
	cache_remote_node(host);
	}

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

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

	void
	broadcast_unseen_local_values(crm_node_t peer, xmlNode xml)
	{
	GHashTableIter aIter;
	GHashTableIter vIter;
	attribute_t *a = NULL;
	attribute_value_t *v = NULL;
	xmlNode *sync = 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)) {
	if (!(v->seen) && pcmk__str_eq(v->nodename, attrd_cluster->uname,
	pcmk__str_casei)) {
	if (sync == NULL) {
	sync = create_xml_node(NULL, __func__);
	crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
	}
	add_attribute_value_xml(sync, a, v, a->timeout_ms && a->timer);
	}
	}
	}

	if (sync != NULL) {
	crm_debug("Broadcasting local-only values");
	send_attrd_message(NULL, sync);
	free_xml(sync);
	}
	}

	/*!
	* \internal
	* \brief Override an attribute sync with a local value
	*
	* Broadcast the local node's value for an attribute that's different from the
	* value provided in a peer's attribute synchronization response. This ensures a
	* node's values for itself take precedence and all peers are kept in sync.
	*
	* \param[in] a Attribute entry to override
	*
	* \return Local instance of attribute value
	*/
	static attribute_value_t *
	broadcast_local_value(attribute_t *a)
	{
	attribute_value_t *v = g_hash_table_lookup(a->values, attrd_cluster->uname);
	xmlNode *sync = create_xml_node(NULL, __func__);

	crm_xml_add(sync, PCMK__XA_TASK, PCMK__ATTRD_CMD_SYNC_RESPONSE);
	add_attribute_value_xml(sync, a, v, false);
	attrd_xml_add_writer(sync);
	send_attrd_message(NULL, sync);
	free_xml(sync);
	return v;
	}

	static void
	record_peer_nodeid(attribute_value_t v, const char host)
	{
	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);
	}
	}

	static void
	update_attr_on_host(attribute_t a, crm_node_t peer, xmlNode xml, const char attr,
	const char value, const char host, bool filter,
	int is_force_write)
	{
	attribute_value_t *v = NULL;

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

	if (filter && !pcmk__str_eq(v->current, value, pcmk__str_casei)
	&& pcmk__str_eq(host, attrd_cluster->uname, pcmk__str_casei)) {

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

	} else if (!pcmk__str_eq(v->current, value, pcmk__str_casei)) {
	crm_notice("Setting %s[%s]: %s -> %s "
	CRM_XS " from %s with %s write delay",
	attr, host, pcmk__s(v->current, "(unset)"),
	pcmk__s(value, "(unset)"), peer->uname,
	(a->timeout_ms == 0)? "no" : pcmk__readable_interval(a->timeout_ms));
	pcmk__str_update(&v->current, value);
	a->changed = true;

	if (pcmk__str_eq(host, attrd_cluster->uname, pcmk__str_casei)
	&& pcmk__str_eq(attr, XML_CIB_ATTR_SHUTDOWN, pcmk__str_none)) {

	if (!pcmk__str_eq(value, "0", pcmk__str_null_matches)) {
	attrd_set_requesting_shutdown();

	} else {
	attrd_clear_requesting_shutdown();
	}
	}

	// 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 == 1 && 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, PCMK__XA_ATTR_NODE_ID,
	(int*)&v->nodeid) == 0) && (v->nodeid > 0)) {
	record_peer_nodeid(v, host);
	}
	}

	static int
	update_attr_dampening(attribute_t a, xmlNode xml, const char *attr)
	{
	const char *dvalue = crm_element_value(xml, PCMK__XA_ATTR_DAMPENING);
	int dampen = 0;

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

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

	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);
	}

	return pcmk_rc_ok;
	}

	static void
	update_minimum_protocol_ver(const char *value)
	{
	int ver;

	pcmk__scan_min_int(value, &ver, 0);

	if (ver > 0 && (minimum_protocol_version == -1 \|\| ver < minimum_protocol_version)) {
	minimum_protocol_version = ver;
	crm_trace("Set minimum attrd protocol version to %d",
	minimum_protocol_version);
	}
	}

	static attribute_t *
	populate_attribute(xmlNode xml, const char attr)
	{
	attribute_t *a = NULL;
	bool update_both = false;

	const char *op = crm_element_value(xml, PCMK__XA_TASK);

	// NULL because PCMK__ATTRD_CMD_SYNC_RESPONSE has no PCMK__XA_TASK
	update_both = pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_BOTH,
	pcmk__str_null_matches);

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

	// Update attribute dampening
	if (update_both \|\| pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_DELAY, pcmk__str_none)) {
	int rc = update_attr_dampening(a, xml, attr);

	if (rc != pcmk_rc_ok \|\| !update_both) {
	return NULL;
	}
	}

	return a;
	}

	static void
	attrd_peer_update_one(crm_node_t peer, xmlNode xml, bool filter)
	{
	attribute_t *a = NULL;
	const char *attr = crm_element_value(xml, PCMK__XA_ATTR_NAME);
	const char *value = crm_element_value(xml, PCMK__XA_ATTR_VALUE);
	const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
	int is_force_write = 0;

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

	crm_element_value_int(xml, PCMK__XA_ATTR_FORCE, &is_force_write);

	a = populate_attribute(xml, attr);
	if (a == NULL) {
	return;
	}

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

	crm_debug("Setting %s for all hosts to %s", attr, value);
	xml_remove_prop(xml, PCMK__XA_ATTR_NODE_ID);
	g_hash_table_iter_init(&vIter, a->values);

	while (g_hash_table_iter_next(&vIter, (gpointer *) & host, NULL)) {
	update_attr_on_host(a, peer, xml, attr, value, host, filter, is_force_write);
	}

	} else {
	// Update attribute value for the given host
	update_attr_on_host(a, peer, xml, attr, value, host, filter, is_force_write);
	}

	/* If this is a message from some attrd instance broadcasting its protocol
	* version, check to see if it's a new minimum version.
	*/
	if (pcmk__str_eq(attr, CRM_ATTR_PROTOCOL, pcmk__str_none)) {
	update_minimum_protocol_ver(value);
	}
	}

	void
	attrd_peer_update(crm_node_t peer, xmlNode xml, const char *host, bool filter)
	{
	if (xml_has_children(xml)) {
	for (xmlNode *child = first_named_child(xml, XML_ATTR_OP); child != NULL;
	child = crm_next_same_xml(child)) {
	/* Set the node name on the child message, assuming it isn't already. */
	if (crm_element_value(child, PCMK__XA_ATTR_NODE_NAME) == NULL) {
	crm_xml_add(child, PCMK__XA_ATTR_NODE_NAME, host);
	}

	attrd_peer_update_one(peer, child, filter);
	}

	} else {
	attrd_peer_update_one(peer, xml, filter);
	}
	}

	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;
	}

	#define state_text(state) pcmk__s((state), "in unknown state")

	void
	attrd_peer_change_cb(enum crm_status_type kind, crm_node_t peer, const void data)
	{
	bool gone = false;
	bool is_remote = pcmk_is_set(peer->flags, crm_remote_node);

	switch (kind) {
	case crm_status_uname:
	crm_debug("%s node %s is now %s",
	(is_remote? "Remote" : "Cluster"),
	peer->uname, state_text(peer->state));
	break;

	case crm_status_processes:
	if (!pcmk_is_set(peer->processes, crm_get_cluster_proc())) {
	gone = true;
	}
	crm_debug("Node %s is %s a peer",
	peer->uname, (gone? "no longer" : "now"));
	break;

	case crm_status_nstate:
	crm_debug("%s node %s is now %s (was %s)",
	(is_remote? "Remote" : "Cluster"),
	peer->uname, state_text(peer->state), state_text(data));
	if (pcmk__str_eq(peer->state, CRM_NODE_MEMBER, pcmk__str_casei)) {
	/* 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()
	&& !pcmk_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");
	gone = true;
	}
	break;
	}

	// Remove votes from cluster nodes that leave, in case election in progress
	if (gone && !is_remote) {
	attrd_remove_voter(peer);

	// Ensure remote nodes that come up are in the remote node cache
	} else if (!gone && is_remote) {
	cache_remote_node(peer->uname);
	}
	}

	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 for %s by %s",
	name, pcmk__readable_interval(a->timeout_ms));
	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);
	pcmk__str_update(&a_v->current, 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);
	}
	}

	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 = pcmk__strikey_table(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
	*/
	cib__set_call_options(flags, crm_system_name,
	cib_mixed_update\|cib_scope_local);
	}
	}

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

	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, pcmk__plural_s(cib_updates),
	a->id, pcmk__s(a->uuid, "n/a"), pcmk__s(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);
	}
	diff --git a/daemons/attrd/attrd_corosync.c b/daemons/attrd/attrd_corosync.c
	new file mode 100644
	index 0000000000..26a4a8a5ec
	--- /dev/null
	+++ b/daemons/attrd/attrd_corosync.c
	@@ -0,0 +1,136 @@
	+/*
	+ * Copyright 2013-2022 the Pacemaker project contributors
	+ *
	+ * The version control history for this file may have further details.
	+ *
	+ * This source code is licensed under the GNU General Public License version 2
	+ * or later (GPLv2+) WITHOUT ANY WARRANTY.
	+ */
	+
	+#include <crm_internal.h>
	+
	+#include <errno.h>
	+#include <stdbool.h>
	+#include <stdint.h>
	+#include <stdlib.h>
	+
	+#include <crm/cluster.h>
	+#include <crm/common/logging.h>
	+#include <crm/common/results.h>
	+#include <crm/common/strings_internal.h>
	+#include <crm/msg_xml.h>
	+
	+#include "pacemaker-attrd.h"
	+
	+extern crm_exit_t attrd_exit_status;
	+
	+static void
	+attrd_peer_message(crm_node_t peer, xmlNode xml)
	+{
	+ const char *op = crm_element_value(xml, PCMK__XA_TASK);
	+ const char *election_op = crm_element_value(xml, F_CRM_TASK);
	+ const char *host = crm_element_value(xml, PCMK__XA_ATTR_NODE_NAME);
	+ 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 (pcmk__str_any_of(op, PCMK__ATTRD_CMD_UPDATE, PCMK__ATTRD_CMD_UPDATE_BOTH,
	+ PCMK__ATTRD_CMD_UPDATE_DELAY, NULL)) {
	+ attrd_peer_update(peer, xml, host, false);
	+
	+ } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_SYNC, pcmk__str_none)) {
	+ attrd_peer_sync(peer, xml);
	+
	+ } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_PEER_REMOVE, pcmk__str_none)) {
	+ attrd_peer_remove(host, true, peer->uname);
	+
	+ } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_CLEAR_FAILURE, pcmk__str_none)) {
	+ /* 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 (pcmk__str_eq(op, PCMK__ATTRD_CMD_SYNC_RESPONSE, pcmk__str_none)
	+ && !pcmk__str_eq(peer->uname, attrd_cluster->uname, pcmk__str_casei)) {
	+ attrd_peer_sync_response(peer, peer_won, xml);
	+
	+ } else if (pcmk__str_eq(op, PCMK__ATTRD_CMD_FLUSH, pcmk__str_none)) {
	+ /* Ignore. The flush command was removed in 2.0.0 but may be
	+ * received from peers running older versions.
	+ */
	+ }
	+}
	+
	+static void
	+attrd_cpg_dispatch(cpg_handle_t handle,
	+ const struct cpg_name *groupName,
	+ uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len)
	+{
	+ uint32_t kind = 0;
	+ xmlNode *xml = NULL;
	+ const char *from = NULL;
	+ char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
	+
	+ if(data == NULL) {
	+ return;
	+ }
	+
	+ if (kind == crm_class_cluster) {
	+ xml = string2xml(data);
	+ }
	+
	+ if (xml == NULL) {
	+ crm_err("Bad message of class %d received from %s[%u]: '%.120s'", kind, from, nodeid, data);
	+ } else {
	+ crm_node_t *peer = crm_get_peer(nodeid, from);
	+
	+ attrd_peer_message(peer, xml);
	+ }
	+
	+ free_xml(xml);
	+ free(data);
	+}
	+
	+static void
	+attrd_cpg_destroy(gpointer unused)
	+{
	+ if (attrd_shutting_down()) {
	+ crm_info("Corosync disconnection complete");
	+
	+ } else {
	+ crm_crit("Lost connection to cluster layer, shutting down");
	+ attrd_exit_status = CRM_EX_DISCONNECT;
	+ attrd_shutdown(0);
	+ }
	+}
	+
	+int
	+attrd_cluster_connect(void)
	+{
	+ attrd_cluster = calloc(1, sizeof(crm_cluster_t));
	+
	+ attrd_cluster->destroy = attrd_cpg_destroy;
	+ attrd_cluster->cpg.cpg_deliver_fn = attrd_cpg_dispatch;
	+ attrd_cluster->cpg.cpg_confchg_fn = pcmk_cpg_membership;
	+
	+ crm_set_status_callback(&attrd_peer_change_cb);
	+
	+ if (crm_cluster_connect(attrd_cluster) == FALSE) {
	+ crm_err("Cluster connection failed");
	+ return -ENOTCONN;
	+ }
	+ return pcmk_ok;
	+}
	diff --git a/daemons/attrd/pacemaker-attrd.c b/daemons/attrd/pacemaker-attrd.c
	index 111604d73a..e1614f7dbc 100644
	--- a/daemons/attrd/pacemaker-attrd.c
	+++ b/daemons/attrd/pacemaker-attrd.c
	@@ -1,377 +1,316 @@
	/*
	* Copyright 2013-2022 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* 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/param.h>
	#include <stdio.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <unistd.h>

	#include <stdlib.h>
	#include <errno.h>
	#include <fcntl.h>

	#include <crm/crm.h>
	#include <crm/cib/internal.h>
	#include <crm/msg_xml.h>
	#include <crm/pengine/rules.h>
	#include <crm/common/cmdline_internal.h>
	#include <crm/common/iso8601.h>
	#include <crm/common/ipc.h>
	#include <crm/common/ipc_internal.h>
	#include <crm/common/output_internal.h>
	#include <crm/common/xml.h>
	#include <crm/cluster/internal.h>

	#include <crm/common/attrd_internal.h>
	#include "pacemaker-attrd.h"

	#define SUMMARY "daemon for managing Pacemaker node attributes"

	static pcmk__output_t *out = NULL;

	static pcmk__supported_format_t formats[] = {
	PCMK__SUPPORTED_FORMAT_NONE,
	PCMK__SUPPORTED_FORMAT_TEXT,
	PCMK__SUPPORTED_FORMAT_XML,
	{ NULL, NULL, NULL }
	};

	lrmd_t *the_lrmd = NULL;
	crm_cluster_t *attrd_cluster = NULL;
	crm_trigger_t *attrd_config_read = NULL;
	-static crm_exit_t attrd_exit_status = CRM_EX_OK;
	-
	-static void
	-attrd_cpg_dispatch(cpg_handle_t handle,
	- const struct cpg_name *groupName,
	- uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len)
	-{
	- uint32_t kind = 0;
	- xmlNode *xml = NULL;
	- const char *from = NULL;
	- char *data = pcmk_message_common_cs(handle, nodeid, pid, msg, &kind, &from);
	-
	- if(data == NULL) {
	- return;
	- }
	-
	- if (kind == crm_class_cluster) {
	- xml = string2xml(data);
	- }
	-
	- if (xml == NULL) {
	- crm_err("Bad message of class %d received from %s[%u]: '%.120s'", kind, from, nodeid, data);
	- } else {
	- crm_node_t *peer = crm_get_peer(nodeid, from);
	-
	- attrd_peer_message(peer, xml);
	- }
	-
	- free_xml(xml);
	- free(data);
	-}
	-
	-static void
	-attrd_cpg_destroy(gpointer unused)
	-{
	- if (attrd_shutting_down()) {
	- crm_info("Corosync disconnection complete");
	-
	- } else {
	- crm_crit("Lost connection to cluster layer, shutting down");
	- attrd_exit_status = CRM_EX_DISCONNECT;
	- attrd_shutdown(0);
	- }
	-}
	+crm_exit_t attrd_exit_status = CRM_EX_OK;

	static void
	attrd_cib_destroy_cb(gpointer user_data)
	{
	cib_t *conn = user_data;

	conn->cmds->signoff(conn); /* Ensure IPC is cleaned up */

	if (attrd_shutting_down()) {
	crm_info("Connection disconnection complete");

	} else {
	/* eventually this should trigger a reconnect, not a shutdown */
	crm_crit("Lost connection to the CIB manager, shutting down");
	attrd_exit_status = CRM_EX_DISCONNECT;
	attrd_shutdown(0);
	}

	return;
	}

	static void
	attrd_erase_cb(xmlNode msg, int call_id, int rc, xmlNode output,
	void *user_data)
	{
	do_crm_log_unlikely((rc? LOG_NOTICE : LOG_DEBUG),
	"Cleared transient attributes: %s "
	CRM_XS " xpath=%s rc=%d",
	pcmk_strerror(rc), (char *) user_data, rc);
	}

	#define XPATH_TRANSIENT "//node_state[@uname='%s']/" XML_TAG_TRANSIENT_NODEATTRS

	/*!
	* \internal
	* \brief Wipe all transient attributes for this node from the CIB
	*
	* Clear any previous transient node attributes from the CIB. This is
	* normally done by the DC's controller when this node leaves the cluster, but
	* this handles the case where the node restarted so quickly that the
	* cluster layer didn't notice.
	*
	* \todo If pacemaker-attrd respawns after crashing (see PCMK_respawned),
	* ideally we'd skip this and sync our attributes from the writer.
	* However, currently we reject any values for us that the writer has, in
	* attrd_peer_update().
	*/
	static void
	attrd_erase_attrs(void)
	{
	int call_id;
	char *xpath = crm_strdup_printf(XPATH_TRANSIENT, attrd_cluster->uname);

	crm_info("Clearing transient attributes from CIB " CRM_XS " xpath=%s",
	xpath);

	call_id = the_cib->cmds->remove(the_cib, xpath, NULL,
	cib_quorum_override \| cib_xpath);
	the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE, xpath,
	"attrd_erase_cb", attrd_erase_cb,
	free);
	}

	static int
	attrd_cib_connect(int max_retry)
	{
	static int attempts = 0;

	int rc = -ENOTCONN;

	the_cib = cib_new();
	if (the_cib == NULL) {
	return -ENOTCONN;
	}

	do {
	if(attempts > 0) {
	sleep(attempts);
	}

	attempts++;
	crm_debug("Connection attempt %d to the CIB manager", attempts);
	rc = the_cib->cmds->signon(the_cib, T_ATTRD, cib_command);

	} while(rc != pcmk_ok && attempts < max_retry);

	if (rc != pcmk_ok) {
	crm_err("Connection to the CIB manager failed: %s " CRM_XS " rc=%d",
	pcmk_strerror(rc), rc);
	goto cleanup;
	}

	crm_debug("Connected to the CIB manager after %d attempts", attempts);

	rc = the_cib->cmds->set_connection_dnotify(the_cib, attrd_cib_destroy_cb);
	if (rc != pcmk_ok) {
	crm_err("Could not set disconnection callback");
	goto cleanup;
	}

	rc = the_cib->cmds->add_notify_callback(the_cib, T_CIB_REPLACE_NOTIFY, attrd_cib_replaced_cb);
	if(rc != pcmk_ok) {
	crm_err("Could not set CIB notification callback");
	goto cleanup;
	}

	rc = the_cib->cmds->add_notify_callback(the_cib, T_CIB_DIFF_NOTIFY, attrd_cib_updated_cb);
	if (rc != pcmk_ok) {
	crm_err("Could not set CIB notification callback (update)");
	goto cleanup;
	}

	return pcmk_ok;

	cleanup:
	cib__clean_up_connection(&the_cib);
	return -ENOTCONN;
	}

	/*!
	* \internal
	* \brief Prepare the CIB after cluster is connected
	*/
	static void
	attrd_cib_init(void)
	{
	// We have no attribute values in memory, wipe the CIB to match
	attrd_erase_attrs();

	// Set a trigger for reading the CIB (for the alerts section)
	attrd_config_read = mainloop_add_trigger(G_PRIORITY_HIGH, attrd_read_options, NULL);

	// Always read the CIB at start-up
	mainloop_set_trigger(attrd_config_read);
	}

	-static int
	-attrd_cluster_connect(void)
	-{
	- attrd_cluster = calloc(1, sizeof(crm_cluster_t));
	-
	- attrd_cluster->destroy = attrd_cpg_destroy;
	- attrd_cluster->cpg.cpg_deliver_fn = attrd_cpg_dispatch;
	- attrd_cluster->cpg.cpg_confchg_fn = pcmk_cpg_membership;
	-
	- crm_set_status_callback(&attrd_peer_change_cb);
	-
	- if (crm_cluster_connect(attrd_cluster) == FALSE) {
	- crm_err("Cluster connection failed");
	- return -ENOTCONN;
	- }
	- return pcmk_ok;
	-}
	-
	static bool
	ipc_already_running(void)
	{
	pcmk_ipc_api_t *old_instance = NULL;
	int rc = pcmk_rc_ok;

	rc = pcmk_new_ipc_api(&old_instance, pcmk_ipc_attrd);
	if (rc != pcmk_rc_ok) {
	return false;
	}

	rc = pcmk_connect_ipc(old_instance, pcmk_ipc_dispatch_sync);
	if (rc != pcmk_rc_ok) {
	pcmk_free_ipc_api(old_instance);
	return false;
	}

	pcmk_disconnect_ipc(old_instance);
	pcmk_free_ipc_api(old_instance);
	return true;
	}

	static GOptionContext *
	build_arg_context(pcmk__common_args_t args, GOptionGroup *group) {
	return pcmk__build_arg_context(args, "text (default), xml", group, NULL);
	}

	int
	main(int argc, char **argv)
	{
	int rc = pcmk_rc_ok;

	GError *error = NULL;
	bool initialized = false;

	GOptionGroup *output_group = NULL;
	pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
	gchar **processed_args = pcmk__cmdline_preproc(argv, NULL);
	GOptionContext *context = build_arg_context(args, &output_group);

	attrd_init_mainloop();
	crm_log_preinit(NULL, argc, argv);
	mainloop_add_signal(SIGTERM, attrd_shutdown);

	pcmk__register_formats(output_group, formats);
	if (!g_option_context_parse_strv(context, &processed_args, &error)) {
	attrd_exit_status = CRM_EX_USAGE;
	goto done;
	}

	rc = pcmk__output_new(&out, args->output_ty, args->output_dest, argv);
	if ((rc != pcmk_rc_ok) \|\| (out == NULL)) {
	attrd_exit_status = CRM_EX_ERROR;
	g_set_error(&error, PCMK__EXITC_ERROR, attrd_exit_status,
	"Error creating output format %s: %s",
	args->output_ty, pcmk_rc_str(rc));
	goto done;
	}

	if (args->version) {
	out->version(out, false);
	goto done;
	}

	initialized = true;

	crm_log_init(T_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
	crm_notice("Starting Pacemaker node attribute manager");

	if (ipc_already_running()) {
	crm_err("pacemaker-attrd is already active, aborting startup");
	crm_exit(CRM_EX_OK);
	}

	attributes = pcmk__strkey_table(NULL, free_attribute);

	/* Connect to the CIB before connecting to the cluster or listening for IPC.
	* This allows us to assume the CIB is connected whenever we process a
	* cluster or IPC message (which also avoids start-up race conditions).
	*/
	if (attrd_cib_connect(30) != pcmk_ok) {
	attrd_exit_status = CRM_EX_FATAL;
	goto done;
	}
	crm_info("CIB connection active");

	if (attrd_cluster_connect() != pcmk_ok) {
	attrd_exit_status = CRM_EX_FATAL;
	goto done;
	}
	crm_info("Cluster connection active");

	// Initialization that requires the cluster to be connected
	attrd_election_init();
	attrd_cib_init();

	/* Set a private attribute for ourselves with the protocol version we
	* support. This lets all nodes determine the minimum supported version
	* across all nodes. It also ensures that the writer learns our node name,
	* so it can send our attributes to the CIB.
	*/
	attrd_broadcast_protocol();

	attrd_init_ipc();
	crm_notice("Pacemaker node attribute manager successfully started and accepting connections");
	attrd_run_mainloop();

	done:
	if (initialized) {
	crm_info("Shutting down attribute manager");

	attrd_election_fini();
	attrd_ipc_fini();
	attrd_lrmd_disconnect();
	attrd_cib_disconnect();
	g_hash_table_destroy(attributes);
	}

	g_strfreev(processed_args);
	pcmk__free_arg_context(context);

	pcmk__output_and_clear_error(error, out);

	if (out != NULL) {
	out->finish(out, attrd_exit_status, true, NULL);
	pcmk__output_free(out);
	}
	crm_exit(attrd_exit_status);
	}
	diff --git a/daemons/attrd/pacemaker-attrd.h b/daemons/attrd/pacemaker-attrd.h
	index f7237821cf..00e2a2eefc 100644
	--- a/daemons/attrd/pacemaker-attrd.h
	+++ b/daemons/attrd/pacemaker-attrd.h
	@@ -1,160 +1,166 @@
	/*
	* Copyright 2013-2022 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#ifndef PACEMAKER_ATTRD__H
	# define PACEMAKER_ATTRD__H

	#include <regex.h>
	#include <glib.h>
	#include <crm/crm.h>
	#include <crm/cluster.h>
	#include <crm/cluster/election_internal.h>
	#include <crm/cib/internal.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 PCMK__ATTRD_CMD_UPDATE (PCMK__XA_ATTR_NAME only),
	* PCMK__ATTRD_CMD_PEER_REMOVE, PCMK__ATTRD_CMD_REFRESH,
	* PCMK__ATTRD_CMD_FLUSH, PCMK__ATTRD_CMD_SYNC,
	* PCMK__ATTRD_CMD_SYNC_RESPONSE
	* 1 1.1.13 PCMK__ATTRD_CMD_UPDATE (with PCMK__XA_ATTR_PATTERN),
	* PCMK__ATTRD_CMD_QUERY
	* 1 1.1.15 PCMK__ATTRD_CMD_UPDATE_BOTH,
	* PCMK__ATTRD_CMD_UPDATE_DELAY
	* 2 1.1.17 PCMK__ATTRD_CMD_CLEAR_FAILURE
	* 3 2.1.1 PCMK__ATTRD_CMD_SYNC_RESPONSE indicates remote nodes
	* 4 2.2.0 Multiple attributes can be updated in a single IPC
	* message
	*/
	#define ATTRD_PROTOCOL_VERSION "4"

	void attrd_init_mainloop(void);
	void attrd_run_mainloop(void);

	void attrd_set_requesting_shutdown(void);
	void attrd_clear_requesting_shutdown(void);
	bool attrd_requesting_shutdown(void);
	bool attrd_shutting_down(void);
	void attrd_shutdown(int nsig);
	void attrd_init_ipc(void);
	void attrd_ipc_fini(void);

	void attrd_cib_disconnect(void);

	bool attrd_value_needs_expansion(const char *value);
	int attrd_expand_value(const char value, const char old_value);

	/* regular expression to clear failures of all resources */
	#define ATTRD_RE_CLEAR_ALL \
	"^(" PCMK__FAIL_COUNT_PREFIX "\|" PCMK__LAST_FAILURE_PREFIX ")-"

	/* regular expression to clear failure of all operations for one resource
	* (format takes resource name)
	*
	* @COMPAT attributes set < 1.1.17:
	* also match older attributes that do not have the operation part
	*/
	#define ATTRD_RE_CLEAR_ONE ATTRD_RE_CLEAR_ALL "%s(#.+_[0-9]+)?$"

	/* regular expression to clear failure of one operation for one resource
	* (format takes resource name, operation name, and interval)
	*
	* @COMPAT attributes set < 1.1.17:
	* also match older attributes that do not have the operation part
	*/
	#define ATTRD_RE_CLEAR_OP ATTRD_RE_CLEAR_ALL "%s(#%s_%u)?$"

	int attrd_failure_regex(regex_t regex, const char rsc, const char *op,
	guint interval_ms);

	extern cib_t *the_cib;

	/* Alerts */

	extern lrmd_t *the_lrmd;
	extern crm_trigger_t *attrd_config_read;

	void attrd_lrmd_disconnect(void);
	gboolean attrd_read_options(gpointer user_data);
	void attrd_cib_replaced_cb(const char event, xmlNode msg);
	void attrd_cib_updated_cb(const char event, xmlNode msg);
	int attrd_send_attribute_alert(const char *node, int nodeid,
	const char attr, const char value);

	// Elections
	void attrd_election_init(void);
	void attrd_election_fini(void);
	void attrd_start_election_if_needed(void);
	bool attrd_election_won(void);
	void attrd_handle_election_op(const crm_node_t peer, xmlNode xml);
	bool attrd_check_for_new_writer(const crm_node_t peer, const xmlNode xml);
	void attrd_declare_winner(void);
	void attrd_remove_voter(const crm_node_t *peer);
	void attrd_xml_add_writer(xmlNode *xml);

	typedef struct attribute_s {
	char uuid; / TODO: Remove if at all possible */
	char *id;
	char *set;
	GHashTable *values;
	int update;
	int timeout_ms;

	/* TODO: refactor these three as a bitmask */
	bool changed; /* whether attribute value has changed since last write */
	bool unknown_peer_uuids; /* whether we know we're missing a peer uuid */
	gboolean is_private; /* whether to keep this attribute out of the CIB */

	mainloop_timer_t *timer;

	char *user;

	gboolean force_write; /* Flag for updating attribute by ignoring delay */

	} attribute_t;

	typedef struct attribute_value_s {
	uint32_t nodeid;
	gboolean is_remote;
	char *nodename;
	char *current;
	char *requested;
	gboolean seen;
	} attribute_value_t;

	extern crm_cluster_t *attrd_cluster;
	extern GHashTable *attributes;

	#define CIB_OP_TIMEOUT_S 120

	+int attrd_cluster_connect(void);
	+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, bool uncache, const char source);
	+void attrd_peer_clear_failure(crm_node_t peer, xmlNode xml);
	+void attrd_peer_sync_response(crm_node_t peer, bool peer_won, xmlNode xml);
	+
	void write_attributes(bool all, bool ignore_delay);
	void attrd_broadcast_protocol(void);
	-void attrd_peer_message(crm_node_t client, xmlNode msg);
	void attrd_client_peer_remove(pcmk__client_t client, xmlNode xml);
	void attrd_client_clear_failure(xmlNode *xml);
	void attrd_client_update(xmlNode *xml);
	void attrd_client_refresh(void);
	void attrd_client_query(pcmk__client_t *client, uint32_t id, uint32_t flags,
	xmlNode *query);

	void free_attribute(gpointer data);

	gboolean attrd_election_cb(gpointer user_data);
	void attrd_peer_change_cb(enum crm_status_type type, crm_node_t peer, const void data);

	#endif /* PACEMAKER_ATTRD__H */

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