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	diff --git a/attrd/commands.c b/attrd/commands.c
	index 941f5ef647..dc488fe482 100644
	--- a/attrd/commands.c
	+++ b/attrd/commands.c
	@@ -1,1174 +1,1192 @@
	/*
	* Copyright (C) 2013 Andrew Beekhof <andrew@beekhof.net>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This software is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/
	#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 <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. Currently, there is no way to know the minimum
	- * version supported by all peers, which limits its usefulness.
	+ * 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_FAILCOUNT
	*/
	#define ATTRD_PROTOCOL_VERSION "2"

	int last_cib_op_done = 0;
	char *peer_writer = NULL;
	GHashTable *attributes = NULL;

	void write_attribute(attribute_t *a);
	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, 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);
	crm_xml_add_int(data, F_ATTRD_WRITER, election_state(writer));

	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 in state %d", a->id, election_state(writer));
	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)
	{
	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);

	return xml;
	}

	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
	crm_trace("Performing all %s operations as user '%s'", a->id, a->user);
	a->user = crm_element_value_copy(xml, F_ATTRD_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)
	{
	const char *host = crm_element_value(xml, F_ATTRD_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() */
	} 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);
	}
	}

	if ((peer_writer == NULL) && (election_state(writer) != election_in_progress)) {
	crm_info("Starting an election to determine the writer");
	election_vote(writer);
	}

	crm_debug("Broadcasting %s[%s] = %s%s", attr, host, value,
	((election_state(writer) == 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 This would be most efficient, but there is currently no way to
	- * verify that all peers support the op. If that ever changes, we could
	- * enable this code.
	+ /* @TODO Track the minimum supported protocol version across all nodes,
	+ * then enable this more-efficient code.
	*/
	- if (all_peers_support_clear_failure) {
	+ 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_s = 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 {
	int interval = crm_get_interval(interval_s);

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

	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)
	{
	GHashTableIter iter;
	attribute_t *a = NULL;

	/* 'refresh' forces a write of the current value of all attributes
	* Cancel any existing timers, we're writing it NOW
	*/
	g_hash_table_iter_init(&iter, attributes);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) & a)) {
	mainloop_timer_stop(a->timer);
	}

	crm_info("Updating all attributes");
	write_attributes(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 (%d)",
	origin, pcmk_strerror(-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
	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_s = crm_element_value(xml, F_ATTRD_INTERVAL);
	int interval = crm_get_interval(interval_s);
	char *attr = NULL;
	GHashTableIter iter;
	regex_t regex;

	if (attrd_failure_regex(&regex, rsc, op, interval) != 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);
	+}
	+
	void
	attrd_peer_message(crm_node_t peer, xmlNode xml)
	{
	int peer_state = 0;
	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);

	if(election_op) {
	enum election_result rc = 0;

	crm_xml_add(xml, F_CRM_HOST_FROM, peer->uname);
	rc = election_count_vote(writer, xml, TRUE);
	switch(rc) {
	case election_start:
	free(peer_writer);
	peer_writer = NULL;
	election_vote(writer);
	break;
	case election_lost:
	free(peer_writer);
	peer_writer = strdup(peer->uname);
	break;
	default:
	election_check(writer);
	break;
	}
	return;
	}

	crm_element_value_int(xml, F_ATTRD_WRITER, &peer_state);
	if(election_state(writer) == election_won
	&& peer_state == election_won
	&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
	crm_notice("Detected another attribute writer: %s", peer->uname);
	election_vote(writer);

	} else if(peer_state == election_won) {
	if(peer_writer == NULL) {
	peer_writer = strdup(peer->uname);
	crm_notice("Recorded attribute writer: %s", peer->uname);

	} else if(safe_str_neq(peer->uname, peer_writer)) {
	crm_notice("Recorded new attribute writer: %s (was %s)", peer->uname, peer_writer);
	free(peer_writer);
	peer_writer = strdup(peer->uname);
	}
	}

	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);
	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);
	}
	}
	}

	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);
	}
	}

	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_remote_peer_cache_add(host);
	}

	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_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;

	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);

	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_stop(a->timer);
	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);

	crm_xml_add_int(sync, F_ATTRD_WRITER, election_state(writer));

	/* 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_info("Setting %s[%s]: %s -> %s from %s",
	attr, host, v->current, value, peer->uname);
	free(v->current);
	v->current = (value? strdup(value) : NULL);
	a->changed = TRUE;

	// Write out new value or start dampening timer
	if (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 {
	crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
	}

	/* 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 (election_state(writer) == election_won) {
	write_attributes(FALSE);
	}
	}
	}

	void
	write_or_elect_attribute(attribute_t *a)
	{
	enum election_result rc = election_state(writer);
	if(rc == election_won) {
	write_attribute(a);

	} else if(rc == election_in_progress) {
	crm_trace("Election in progress to determine who will write out %s", a->id);

	} else if(peer_writer == NULL) {
	crm_info("Starting an election to determine who will write out %s", a->id);
	election_vote(writer);

	} else {
	crm_trace("%s will write out %s, we are in state %d", peer_writer, a->id, rc);
	}
	}

	gboolean
	attrd_election_cb(gpointer user_data)
	{
	free(peer_writer);
	peer_writer = strdup(attrd_cluster->uname);

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

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


	void
	attrd_peer_change_cb(enum crm_status_type kind, crm_node_t peer, const void data)
	{
	if ((kind == crm_status_nstate) \|\| (kind == crm_status_rstate)) {
	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 ((election_state(writer) == 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");
	if (peer_writer && safe_str_eq(peer->uname, peer_writer)) {
	free(peer_writer);
	peer_writer = NULL;
	crm_notice("Lost attribute writer %s", 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);
	goto done;
	}

	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;
	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, "Update %d for %s: %s (%d)", call_id, name, 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, "Update %d for %s[%s]=%s: %s (%d)", call_id, a->id, peer, v->requested, pcmk_strerror(rc), rc);
	free(v->requested);
	v->requested = NULL;
	if (rc != pcmk_ok) {
	a->changed = TRUE; /* Attempt write out again */
	}
	}
	done:
	if(a && a->changed && election_state(writer) == election_won) {
	write_attribute(a);
	}
	}

	void
	write_attributes(bool all)
	{
	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;
	}

	if(all \|\| a->changed) {
	write_attribute(a);
	} else {
	crm_debug("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);
	}
	}

	void
	write_attribute(attribute_t *a)
	{
	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 */
	if (the_cib == NULL) {
	crm_info("Write out of '%s' delayed: cib not connected", a->id);
	return;

	} else if (a->update && (a->update < last_cib_op_done)) {
	crm_info("Write out of '%s' continuing: update %d considered lost", a->id, a->update);

	} 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)) {
	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;

	/* 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("Update error (peer not found): %s[%s]=%s failed (host=%p)",
	a->id, v->nodename, v->current, peer);
	continue;
	}

	/* If we're just learning the peer's node id, remember it */
	if (peer->id && (v->nodeid == 0)) {
	crm_trace("Updating value's nodeid");
	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("Update %s[%s]=%s postponed: unknown peer UUID, will retry if UUID is learned",
	a->id, v->nodename, v->current, peer);
	continue;
	}

	/* Add this value to status update XML */
	crm_debug("Update: %s[%s]=%s (%s %u %u %s)", a->id, v->nodename,
	v->current, peer->uuid, peer->id, v->nodeid, peer->uname);
	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, ((private_updates == 1)? "" : "s"),
	a->id, (a->uuid? a->uuid : "<n/a>"), a->set);
	}
	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 update %d with %d changes for %s, id=%s, set=%s",
	a->update, cib_updates, a->id, (a->uuid? a->uuid : "<n/a>"), a->set);

	the_cib->cmds->register_callback_full(the_cib, a->update, 120, 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/attrd/internal.h b/attrd/internal.h
	index 99fc3fd0f4..23bcbda751 100644
	--- a/attrd/internal.h
	+++ b/attrd/internal.h
	@@ -1,66 +1,67 @@
	/*
	* Copyright (C) 2013-2017 Andrew Beekhof <andrew@beekhof.net>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This software is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include <attrd_common.h>

	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;

	} attribute_t;

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

	crm_cluster_t *attrd_cluster;
	GHashTable *attributes;
	election_t *writer;

	#define attrd_send_ack(client, id, flags) \
	crm_ipcs_send_ack((client), (id), (flags), "ack", __FUNCTION__, __LINE__)

	void write_attributes(bool all);
	+void attrd_broadcast_protocol(void);
	void attrd_peer_message(crm_node_t client, xmlNode msg);
	void attrd_client_peer_remove(const char client_name, xmlNode xml);
	void attrd_client_clear_failure(xmlNode *xml);
	void attrd_client_update(xmlNode *xml);
	void attrd_client_refresh(void);
	void attrd_client_query(crm_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);
	diff --git a/attrd/main.c b/attrd/main.c
	index 2670dc52be..7721439136 100644
	--- a/attrd/main.c
	+++ b/attrd/main.c
	@@ -1,402 +1,409 @@
	/*
	* Copyright (C) 2013 Andrew Beekhof <andrew@beekhof.net>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This software is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#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/iso8601.h>
	#include <crm/common/ipc.h>
	#include <crm/common/ipcs.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster/election.h>

	#include <crm/common/xml.h>

	#include <crm/attrd.h>
	#include <internal.h>

	lrmd_t *the_lrmd = NULL;
	crm_cluster_t *attrd_cluster = NULL;
	election_t *writer = NULL;
	crm_trigger_t *attrd_config_read = NULL;
	static int attrd_exit_status = pcmk_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 Corosync service!");
	attrd_exit_status = ECONNRESET;
	attrd_shutdown(0);
	}
	}

	static void
	attrd_cib_replaced_cb(const char event, xmlNode msg)
	{
	crm_notice("Updating all attributes after %s event", event);
	if(election_state(writer) == election_won) {
	write_attributes(TRUE);
	}
	}

	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_err("Lost connection to CIB service!");
	attrd_exit_status = ECONNRESET;
	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 crmd 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 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()
	{
	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->delete(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 DAEMON_RESPAWN_STOP;
	}

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

	attempts++;
	crm_debug("CIB signon attempt %d", 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("Signon to CIB failed: %s (%d)", pcmk_strerror(rc), rc);
	goto cleanup;
	}

	crm_debug("Connected to the CIB 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;
	}

	// 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);

	+ /* 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();
	+
	return pcmk_ok;

	cleanup:
	the_cib->cmds->signoff(the_cib);
	cib_delete(the_cib);
	the_cib = NULL;
	return DAEMON_RESPAWN_STOP;
	}

	static int32_t
	attrd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size)
	{
	uint32_t id = 0;
	uint32_t flags = 0;
	crm_client_t *client = crm_client_get(c);
	xmlNode *xml = crm_ipcs_recv(client, data, size, &id, &flags);
	const char *op;

	if (xml == NULL) {
	crm_debug("No msg from %d (%p)", crm_ipcs_client_pid(c), c);
	return 0;
	}
	#if ENABLE_ACL
	CRM_ASSERT(client->user != NULL);
	crm_acl_get_set_user(xml, F_ATTRD_USER, client->user);
	#endif

	crm_trace("Processing msg from %d (%p)", crm_ipcs_client_pid(c), c);
	crm_log_xml_trace(xml, __FUNCTION__);

	op = crm_element_value(xml, F_ATTRD_TASK);

	if (client->name == NULL) {
	const char *value = crm_element_value(xml, F_ORIG);
	client->name = crm_strdup_printf("%s.%d", value?value:"unknown", client->pid);
	}

	if (safe_str_eq(op, ATTRD_OP_PEER_REMOVE)) {
	attrd_send_ack(client, id, flags);
	attrd_client_peer_remove(client->name, xml);

	} else if (safe_str_eq(op, ATTRD_OP_CLEAR_FAILURE)) {
	attrd_send_ack(client, id, flags);
	attrd_client_clear_failure(xml);

	} else if (safe_str_eq(op, ATTRD_OP_UPDATE)) {
	attrd_send_ack(client, id, flags);
	attrd_client_update(xml);

	} else if (safe_str_eq(op, ATTRD_OP_UPDATE_BOTH)) {
	attrd_send_ack(client, id, flags);
	attrd_client_update(xml);

	} else if (safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
	attrd_send_ack(client, id, flags);
	attrd_client_update(xml);

	} else if (safe_str_eq(op, ATTRD_OP_REFRESH)) {
	attrd_send_ack(client, id, flags);
	attrd_client_refresh();

	} else if (safe_str_eq(op, ATTRD_OP_QUERY)) {
	/* queries will get reply, so no ack is necessary */
	attrd_client_query(client, id, flags, xml);

	} else {
	crm_info("Ignoring request from client %s with unknown operation %s",
	client->name, op);
	}

	free_xml(xml);
	return 0;
	}

	static int
	attrd_cluster_connect()
	{
	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 DAEMON_RESPAWN_STOP;
	}
	return pcmk_ok;
	}

	/* INDENT-OFF */
	static struct crm_option long_options[] = {
	/* Top-level Options */
	{"help", 0, 0, '?', "\tThis text"},
	{"verbose", 0, 0, 'V', "\tIncrease debug output"},

	{0, 0, 0, 0}
	};
	/* INDENT-ON */

	int
	main(int argc, char **argv)
	{
	int flag = 0;
	int index = 0;
	int argerr = 0;
	qb_ipcs_service_t *ipcs = NULL;

	attrd_init_mainloop();
	crm_log_preinit(NULL, argc, argv);
	crm_set_options(NULL, "[options]", long_options,
	"Daemon for aggregating and atomically storing node attribute updates into the CIB");

	mainloop_add_signal(SIGTERM, attrd_shutdown);

	while (1) {
	flag = crm_get_option(argc, argv, &index);
	if (flag == -1)
	break;

	switch (flag) {
	case 'V':
	crm_bump_log_level(argc, argv);
	break;
	case 'h': /* Help message */
	crm_help(flag, EX_OK);
	break;
	default:
	++argerr;
	break;
	}
	}

	if (optind > argc) {
	++argerr;
	}

	if (argerr) {
	crm_help('?', EX_USAGE);
	}

	crm_log_init(T_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv, FALSE);
	crm_info("Starting up");
	attributes = g_hash_table_new_full(crm_str_hash, g_str_equal, NULL, free_attribute);

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

	attrd_exit_status = attrd_cib_connect(10);
	if (attrd_exit_status != pcmk_ok) {
	goto done;
	}
	crm_info("CIB connection active");

	writer = election_init(T_ATTRD, attrd_cluster->uname, 120000, attrd_election_cb);
	attrd_init_ipc(&ipcs, attrd_ipc_dispatch);
	crm_info("Accepting attribute updates");

	attrd_run_mainloop();

	done:
	crm_info("Shutting down attribute manager");

	election_fini(writer);
	if (ipcs) {
	crm_client_disconnect_all(ipcs);
	qb_ipcs_destroy(ipcs);
	g_hash_table_destroy(attributes);
	}

	attrd_lrmd_disconnect();
	attrd_cib_disconnect();

	return crm_exit(attrd_exit_status);
	}
	diff --git a/include/crm/crm.h b/include/crm/crm.h
	index 05ec555f49..6e2bcfa0f2 100644
	--- a/include/crm/crm.h
	+++ b/include/crm/crm.h
	@@ -1,231 +1,232 @@
	/*
	* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This software is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/
	#ifndef CRM__H
	# define CRM__H

	/**
	* \file
	* \brief A dumping ground
	* \ingroup core
	*/

	# include <crm_config.h>
	# include <stdlib.h>
	# include <glib.h>
	# include <stdbool.h>

	# include <string.h>

	# include <libxml/tree.h>

	# define CRM_FEATURE_SET "3.0.14"

	# define EOS '\0'
	# define DIMOF(a) ((int) (sizeof(a)/sizeof(a[0])) )

	# ifndef MAX_NAME
	# define MAX_NAME 256
	# endif

	# ifndef __GNUC__
	# define __builtin_expect(expr, result) (expr)
	# endif

	/* Some handy macros used by the Linux kernel */
	# define __likely(expr) __builtin_expect(expr, 1)
	# define __unlikely(expr) __builtin_expect(expr, 0)

	# define CRM_META "CRM_meta"

	extern char *crm_system_name;

	/* INDENT-OFF */

	/* Clean these up at some point, some probably should be runtime options */
	# define SOCKET_LEN 1024
	# define APPNAME_LEN 256
	# define MAX_IPC_FAIL 5
	# define MAX_IPC_DELAY 120

	# define DAEMON_RESPAWN_STOP 100

	# define MSG_LOG 1
	# define DOT_FSA_ACTIONS 1
	# define DOT_ALL_FSA_INPUTS 1
	/* #define FSA_TRACE 1 */

	/* This header defines INFINITY, but it might be defined elsewhere as well
	* (e.g. math.h), so undefine it first. This, of course, complicates any attempt
	* to use the other definition in any code that includes this header.
	*
	* @TODO: Rename our constant (which will break API backward compatibility).
	*/
	# undef INFINITY

	# define INFINITY_S "INFINITY"
	# define MINUS_INFINITY_S "-INFINITY"

	# define INFINITY 1000000

	/* Sub-systems */
	# define CRM_SYSTEM_DC "dc"
	# define CRM_SYSTEM_DCIB "dcib"
	/* The master CIB */
	# define CRM_SYSTEM_CIB "cib"
	# define CRM_SYSTEM_CRMD "crmd"
	# define CRM_SYSTEM_LRMD "lrmd"
	# define CRM_SYSTEM_PENGINE "pengine"
	# define CRM_SYSTEM_TENGINE "tengine"
	# define CRM_SYSTEM_STONITHD "stonithd"
	# define CRM_SYSTEM_MCP "pacemakerd"

	// Names of internally generated node attributes
	# define CRM_ATTR_UNAME "#uname"
	# define CRM_ATTR_ID "#id"
	# define CRM_ATTR_KIND "#kind"
	# define CRM_ATTR_ROLE "#role"
	# define CRM_ATTR_IS_DC "#is_dc"
	# define CRM_ATTR_CLUSTER_NAME "#cluster-name"
	# define CRM_ATTR_SITE_NAME "#site-name"
	# define CRM_ATTR_UNFENCED "#node-unfenced"
	# define CRM_ATTR_DIGESTS_ALL "#digests-all"
	# define CRM_ATTR_DIGESTS_SECURE "#digests-secure"
	# define CRM_ATTR_RA_VERSION "#ra-version"
	+# define CRM_ATTR_PROTOCOL "#attrd-protocol"

	/* Valid operations */
	# define CRM_OP_NOOP "noop"
	# define CRM_OP_JOIN_ANNOUNCE "join_announce"
	# define CRM_OP_JOIN_OFFER "join_offer"
	# define CRM_OP_JOIN_REQUEST "join_request"
	# define CRM_OP_JOIN_ACKNAK "join_ack_nack"
	# define CRM_OP_JOIN_CONFIRM "join_confirm"
	# define CRM_OP_PING "ping"
	# define CRM_OP_THROTTLE "throttle"
	# define CRM_OP_VOTE "vote"
	# define CRM_OP_NOVOTE "no-vote"
	# define CRM_OP_HELLO "hello"
	# define CRM_OP_PECALC "pe_calc"
	# define CRM_OP_QUIT "quit"
	# define CRM_OP_LOCAL_SHUTDOWN "start_shutdown"
	# define CRM_OP_SHUTDOWN_REQ "req_shutdown"
	# define CRM_OP_SHUTDOWN "do_shutdown"
	# define CRM_OP_FENCE "stonith"
	# define CRM_OP_REGISTER "register"
	# define CRM_OP_IPC_FWD "ipc_fwd"
	# define CRM_OP_INVOKE_LRM "lrm_invoke"
	# define CRM_OP_LRM_REFRESH "lrm_refresh" /* Deprecated */
	# define CRM_OP_LRM_QUERY "lrm_query"
	# define CRM_OP_LRM_DELETE "lrm_delete"
	# define CRM_OP_LRM_FAIL "lrm_fail"
	# define CRM_OP_PROBED "probe_complete"
	# define CRM_OP_REPROBE "probe_again"
	# define CRM_OP_CLEAR_FAILCOUNT "clear_failcount"
	# define CRM_OP_REMOTE_STATE "remote_state"
	# define CRM_OP_RELAXED_SET "one-or-more"
	# define CRM_OP_RELAXED_CLONE "clone-one-or-more"
	# define CRM_OP_RM_NODE_CACHE "rm_node_cache"
	# define CRM_OP_MAINTENANCE_NODES "maintenance_nodes"

	/* @COMPAT: These symbols are deprecated and not used by Pacemaker,
	* but they are kept for public API backward compatibility.
	*/
	# define CRM_OP_DIE "die_no_respawn"
	# define CRM_OP_RETRIVE_CIB "retrieve_cib"
	# define CRM_OP_HBEAT "dc_beat"
	# define CRM_OP_ABORT "abort"
	# define CRM_OP_EVENTCC "event_cc"
	# define CRM_OP_TEABORT "te_abort"
	# define CRM_OP_TEABORTED "te_abort_confirmed"
	# define CRM_OP_TE_HALT "te_halt"
	# define CRM_OP_TECOMPLETE "te_complete"
	# define CRM_OP_TETIMEOUT "te_timeout"
	# define CRM_OP_TRANSITION "transition"
	# define CRM_OP_DEBUG_UP "debug_inc" /* unused since 1.1.8 */
	# define CRM_OP_DEBUG_DOWN "debug_dec" /* unused since 1.1.8 */
	# define CRM_OP_NODES_PROBED "probe_nodes_complete"

	/* Possible cluster membership states */
	# define CRMD_JOINSTATE_DOWN "down"
	# define CRMD_JOINSTATE_PENDING "pending"
	# define CRMD_JOINSTATE_MEMBER "member"
	# define CRMD_JOINSTATE_NACK "banned"

	# define CRMD_ACTION_DELETE "delete"
	# define CRMD_ACTION_CANCEL "cancel"

	# define CRMD_ACTION_RELOAD "reload"
	# define CRMD_ACTION_MIGRATE "migrate_to"
	# define CRMD_ACTION_MIGRATED "migrate_from"

	# define CRMD_ACTION_START "start"
	# define CRMD_ACTION_STARTED "running"

	# define CRMD_ACTION_STOP "stop"
	# define CRMD_ACTION_STOPPED "stopped"

	# define CRMD_ACTION_PROMOTE "promote"
	# define CRMD_ACTION_PROMOTED "promoted"
	# define CRMD_ACTION_DEMOTE "demote"
	# define CRMD_ACTION_DEMOTED "demoted"

	# define CRMD_ACTION_NOTIFY "notify"
	# define CRMD_ACTION_NOTIFIED "notified"

	# define CRMD_ACTION_STATUS "monitor"
	# define CRMD_ACTION_METADATA "meta-data"
	# define CRMD_METADATA_CALL_TIMEOUT 30000

	/* short names */
	# define RSC_DELETE CRMD_ACTION_DELETE
	# define RSC_CANCEL CRMD_ACTION_CANCEL

	# define RSC_MIGRATE CRMD_ACTION_MIGRATE
	# define RSC_MIGRATED CRMD_ACTION_MIGRATED

	# define RSC_START CRMD_ACTION_START
	# define RSC_STARTED CRMD_ACTION_STARTED

	# define RSC_STOP CRMD_ACTION_STOP
	# define RSC_STOPPED CRMD_ACTION_STOPPED

	# define RSC_PROMOTE CRMD_ACTION_PROMOTE
	# define RSC_PROMOTED CRMD_ACTION_PROMOTED
	# define RSC_DEMOTE CRMD_ACTION_DEMOTE
	# define RSC_DEMOTED CRMD_ACTION_DEMOTED

	# define RSC_NOTIFY CRMD_ACTION_NOTIFY
	# define RSC_NOTIFIED CRMD_ACTION_NOTIFIED

	# define RSC_STATUS CRMD_ACTION_STATUS
	# define RSC_METADATA CRMD_ACTION_METADATA
	/* INDENT-ON */

	typedef GList *GListPtr;

	# include <crm/common/logging.h>
	# include <crm/common/util.h>
	# include <crm/error.h>

	static inline const char crm_action_str(const char task, int interval) {
	if(safe_str_eq(task, RSC_STATUS) && !interval) {
	return "probe";
	}
	return task;
	}

	#endif

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