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	diff --git a/daemons/attrd/attrd_alerts.c b/daemons/attrd/attrd_alerts.c
	index 377e27a19d..e63d635d31 100644
	--- a/daemons/attrd/attrd_alerts.c
	+++ b/daemons/attrd/attrd_alerts.c
	@@ -1,147 +1,144 @@
	/*
	* Copyright 2015-2018 Andrew Beekhof <andrew@beekhof.net>
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>
	#include <crm/crm.h>
	#include <crm/cib/internal.h>
	#include <crm/msg_xml.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster/election.h>
	#include <crm/common/alerts_internal.h>
	#include <crm/pengine/rules_internal.h>
	#include <crm/lrmd_alerts_internal.h>
	#include "pacemaker-attrd.h"

	static GListPtr attrd_alert_list = NULL;

	static void
	attrd_lrmd_callback(lrmd_event_data_t * op)
	{
	CRM_CHECK(op != NULL, return);
	switch (op->type) {
	case lrmd_event_disconnect:
	crm_info("Lost connection to executor");
	attrd_lrmd_disconnect();
	break;
	default:
	break;
	}
	}

	static lrmd_t *
	attrd_lrmd_connect()
	{
	if (the_lrmd == NULL) {
	the_lrmd = lrmd_api_new();
	the_lrmd->cmds->set_callback(the_lrmd, attrd_lrmd_callback);
	}

	if (!the_lrmd->cmds->is_connected(the_lrmd)) {
	const unsigned int max_attempts = 10;
	int ret = -ENOTCONN;

	for (int fails = 0; fails < max_attempts; ++fails) {
	ret = the_lrmd->cmds->connect(the_lrmd, T_ATTRD, NULL);
	if (ret == pcmk_ok) {
	break;
	}

	crm_debug("Could not connect to executor, %d tries remaining",
	(max_attempts - fails));
	/* @TODO We don't want to block here with sleep, but we should wait
	* some time between connection attempts. We could possibly add a
	* timer with a callback, but then we'd likely need an alert queue.
	*/
	}

	if (ret != pcmk_ok) {
	attrd_lrmd_disconnect();
	}
	}

	return the_lrmd;
	}

	void
	attrd_lrmd_disconnect() {
	if (the_lrmd) {
	lrmd_t *conn = the_lrmd;

	the_lrmd = NULL; /* in case we're called recursively */
	lrmd_api_delete(conn); /* will disconnect if necessary */
	}
	}

	static void
	config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
	{
	xmlNode *crmalerts = NULL;

	if (rc == -ENXIO) {
	crm_debug("Local CIB has no alerts section");
	return;
	} else if (rc != pcmk_ok) {
	crm_notice("Could not query local CIB: %s", pcmk_strerror(rc));
	return;
	}

	crmalerts = output;
	if (crmalerts && !crm_str_eq(crm_element_name(crmalerts),
	XML_CIB_TAG_ALERTS, TRUE)) {
	crmalerts = first_named_child(crmalerts, XML_CIB_TAG_ALERTS);
	}
	if (!crmalerts) {
	crm_notice("CIB query result has no " XML_CIB_TAG_ALERTS " section");
	return;
	}

	pe_free_alert_list(attrd_alert_list);
	attrd_alert_list = pe_unpack_alerts(crmalerts);
	}

	#define XPATH_ALERTS \
	"/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION "/" XML_CIB_TAG_ALERTS

	gboolean
	attrd_read_options(gpointer user_data)
	{
	int call_id;

	- if (the_cib) {
	- call_id = the_cib->cmds->query(the_cib, XPATH_ALERTS, NULL,
	- cib_xpath \| cib_scope_local);
	-
	- the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE,
	- NULL,
	- "config_query_callback",
	- config_query_callback, free);
	-
	- crm_trace("Querying the CIB... call %d", call_id);
	- } else {
	- crm_err("Could not check for alerts configuration: CIB connection not active");
	- }
	+ CRM_CHECK(the_cib != NULL, return TRUE);
	+
	+ call_id = the_cib->cmds->query(the_cib, XPATH_ALERTS, NULL,
	+ cib_xpath \| cib_scope_local);
	+
	+ the_cib->cmds->register_callback_full(the_cib, call_id, 120, FALSE, NULL,
	+ "config_query_callback",
	+ config_query_callback, free);
	+
	+ crm_trace("Querying the CIB... call %d", call_id);
	return TRUE;
	}

	void
	attrd_cib_updated_cb(const char event, xmlNode msg)
	{
	if (crm_patchset_contains_alert(msg, FALSE)) {
	mainloop_set_trigger(attrd_config_read);
	}
	}

	int
	attrd_send_attribute_alert(const char *node, int nodeid,
	const char attr, const char value)
	{
	if (attrd_alert_list == NULL) {
	return pcmk_ok;
	}
	return lrmd_send_attribute_alert(attrd_lrmd_connect(), attrd_alert_list,
	node, nodeid, attr, value);
	}
	diff --git a/daemons/attrd/attrd_commands.c b/daemons/attrd/attrd_commands.c
	index f07d50339c..1cd7aaf53c 100644
	--- a/daemons/attrd/attrd_commands.c
	+++ b/daemons/attrd/attrd_commands.c
	@@ -1,1288 +1,1285 @@
	/*
	* Copyright 2013-2018 Andrew Beekhof <andrew@beekhof.net>
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

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

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

	#include "pacemaker-attrd.h"

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

	int last_cib_op_done = 0;
	GHashTable *attributes = NULL;

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

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

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

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

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

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

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

	free(a);
	}
	}

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

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

	return xml;
	}

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

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

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

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

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

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

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

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

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

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

	if (host == NULL) {
	int nodeid;

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

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

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

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

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

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

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

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

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

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

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

	a = g_hash_table_lookup(attributes, attr);

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

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

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

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

	attrd_start_election_if_needed();

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

	free(host);

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

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

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

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

	/* Add regular expression matching desired attributes */

	if (rsc) {
	char *pattern;

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

	} else {
	guint interval_ms = crm_parse_interval_spec(interval_spec);

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

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

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

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

	attrd_client_update(xml);
	}

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

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

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

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

	crm_xml_add(reply, F_ATTRD_ATTRIBUTE, attr);

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

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

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

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

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

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

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

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

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

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

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

	crm_xml_add(xml, F_ATTRD_TASK, ATTRD_OP_UPDATE);

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

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

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

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

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

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

	peer_won = attrd_check_for_new_writer(peer, xml);

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

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

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

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

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

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

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

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

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

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

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

	crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (!update_both) {
	return;
	}
	}

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

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

	// Update attribute value for one host

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

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

	xmlNode *sync = create_xml_node(NULL, __FUNCTION__);

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

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

	attrd_xml_add_writer(sync);

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

	} else if (safe_str_neq(v->current, value)) {
	crm_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->timeout_ms && a->timer) {
	crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, attr);
	mainloop_timer_start(a->timer);
	} else {
	write_or_elect_attribute(a);
	}

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

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

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

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

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

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

	gboolean
	attrd_election_cb(gpointer user_data)
	{
	attrd_declare_winner();

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

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


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

	switch (kind) {
	case crm_status_uname:
	break;

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

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

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

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

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

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

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

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

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

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

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

	if (a->changed && attrd_election_won()) {
	/* If 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).
	*/
	if (a->timer) {
	// Attribute has a dampening value, so use that as delay
	if (!mainloop_timer_running(a->timer)) {
	crm_trace("Delayed re-attempted write (%dms) for %s",
	a->timeout_ms, name);
	mainloop_timer_start(a->timer);
	}
	} else {
	/* Set a temporary dampening of 2 seconds (timer will continue
	* to exist until the attribute's dampening gets set or the
	* write succeeds).
	*/
	a->timer = mainloop_timer_add(a->id, 2000, FALSE,
	attribute_timer_cb, a);
	mainloop_timer_start(a->timer);
	}
	}
	}

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

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

	if(all \|\| a->changed) {
	/* When forced write flag is set, ignore delay. */
	write_attribute(a, (a->force_write ? TRUE : ignore_delay));
	} else {
	crm_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);
	}
	}

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

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

	if (a == NULL) {
	return;
	}

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

	/* Defer the write if now's not a good time */
	- 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_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);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	the_cib->cmds->register_callback_full(the_cib, a->update, 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/daemons/attrd/attrd_utils.c b/daemons/attrd/attrd_utils.c
	index 9ce784ca92..8245af66c6 100644
	--- a/daemons/attrd/attrd_utils.c
	+++ b/daemons/attrd/attrd_utils.c
	@@ -1,269 +1,268 @@
	/*
	* Copyright 2004-2018 Andrew Beekhof <andrew@beekhof.net>
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

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

	#include <crm/crm.h>
	#include <crm/common/ipcs.h>
	#include <crm/common/mainloop.h>

	#include "pacemaker-attrd.h"

	cib_t *the_cib = NULL;

	static gboolean shutting_down = FALSE;
	static GMainLoop *mloop = NULL;

	/*!
	* \internal
	* \brief Check whether we're currently shutting down
	*
	* \return TRUE if shutting down, FALSE otherwise
	*/
	gboolean
	attrd_shutting_down()
	{
	return shutting_down;
	}

	/*!
	* \internal
	* \brief Exit (using mainloop or not, as appropriate)
	*
	* \param[in] nsig Ignored
	*/
	void
	attrd_shutdown(int nsig)
	{
	shutting_down = TRUE;
	if ((mloop != NULL) && g_main_loop_is_running(mloop)) {
	g_main_loop_quit(mloop);
	} else {
	crm_exit(CRM_EX_OK);
	}
	}

	/*!
	* \internal
	* \brief Create a main loop for attrd
	*/
	void
	attrd_init_mainloop()
	{
	mloop = g_main_loop_new(NULL, FALSE);
	}

	/*!
	* \internal
	* \brief Run attrd main loop
	*/
	void
	attrd_run_mainloop()
	{
	g_main_loop_run(mloop);
	}

	/*!
	* \internal
	* \brief Accept a new client IPC connection
	*
	* \param[in] c New connection
	* \param[in] uid Client user id
	* \param[in] gid Client group id
	*
	* \return pcmk_ok on success, -errno otherwise
	*/
	static int32_t
	attrd_ipc_accept(qb_ipcs_connection_t *c, uid_t uid, gid_t gid)
	{
	crm_trace("New client connection %p", c);
	if (shutting_down) {
	crm_info("Ignoring new connection from pid %d during shutdown",
	crm_ipcs_client_pid(c));
	return -EPERM;
	}

	if (crm_client_new(c, uid, gid) == NULL) {
	return -EIO;
	}
	return pcmk_ok;
	}

	/*!
	* \internal
	* \brief Callback for successful client connection
	*
	* \param[in] c New connection
	*/
	static void
	attrd_ipc_created(qb_ipcs_connection_t *c)
	{
	crm_trace("Client connection %p accepted", c);
	}

	/*!
	* \internal
	* \brief Destroy a client IPC connection
	*
	* \param[in] c Connection to destroy
	*
	* \return FALSE (i.e. do not re-run this callback)
	*/
	static int32_t
	attrd_ipc_closed(qb_ipcs_connection_t *c)
	{
	crm_client_t *client = crm_client_get(c);

	if (client == NULL) {
	crm_trace("Ignoring request to clean up unknown connection %p", c);
	} else {
	crm_trace("Cleaning up closed client connection %p", c);
	crm_client_destroy(client);
	}
	return FALSE;
	}

	/*!
	* \internal
	* \brief Destroy a client IPC connection
	*
	* \param[in] c Connection to destroy
	*
	* \note We handle a destroyed connection the same as a closed one,
	* but we need a separate handler because the return type is different.
	*/
	static void
	attrd_ipc_destroy(qb_ipcs_connection_t *c)
	{
	crm_trace("Destroying client connection %p", c);
	attrd_ipc_closed(c);
	}

	/*!
	* \internal
	* \brief Set up attrd IPC communication
	*
	* \param[out] ipcs Will be set to newly allocated server connection
	* \param[in] dispatch_fn Handler for new messages on connection
	*/
	void
	attrd_init_ipc(qb_ipcs_service_t **ipcs, qb_ipcs_msg_process_fn dispatch_fn)
	{

	static struct qb_ipcs_service_handlers ipc_callbacks = {
	.connection_accept = attrd_ipc_accept,
	.connection_created = attrd_ipc_created,
	.msg_process = NULL,
	.connection_closed = attrd_ipc_closed,
	.connection_destroyed = attrd_ipc_destroy
	};

	ipc_callbacks.msg_process = dispatch_fn;
	attrd_ipc_server_init(ipcs, &ipc_callbacks);
	}

	void
	attrd_cib_disconnect()
	{
	- if (the_cib) {
	- the_cib->cmds->signoff(the_cib);
	- cib_delete(the_cib);
	- the_cib = NULL;
	- }
	+ CRM_CHECK(the_cib != NULL, return);
	+ the_cib->cmds->signoff(the_cib);
	+ cib_delete(the_cib);
	+ the_cib = NULL;
	}

	/* strlen("value") */
	#define plus_plus_len (5)

	/*!
	* \internal
	* \brief Check whether an attribute value should be expanded
	*
	* \param[in] value Attribute value to check
	*
	* \return TRUE if value needs expansion, FALSE otherwise
	*/
	gboolean
	attrd_value_needs_expansion(const char *value)
	{
	return ((strlen(value) >= (plus_plus_len + 2))
	&& (value[plus_plus_len] == '+')
	&& ((value[plus_plus_len + 1] == '+')
	\|\| (value[plus_plus_len + 1] == '=')));
	}

	/*!
	* \internal
	* \brief Expand an increment expression into an integer
	*
	* \param[in] value Attribute increment expression to expand
	* \param[in] old_value Previous value of attribute
	*
	* \return Expanded value
	*/
	int
	attrd_expand_value(const char value, const char old_value)
	{
	int offset = 1;
	int int_value = char2score(old_value);

	if (value[plus_plus_len + 1] != '+') {
	const char *offset_s = value + (plus_plus_len + 2);

	offset = char2score(offset_s);
	}
	int_value += offset;

	if (int_value > INFINITY) {
	int_value = INFINITY;
	}
	return int_value;
	}

	/*!
	* \internal
	* \brief Create regular expression matching failure-related attributes
	*
	* \param[out] regex Where to store created regular expression
	* \param[in] rsc Name of resource to clear (or NULL for all)
	* \param[in] op Operation to clear if rsc is specified (or NULL for all)
	* \param[in] interval_ms Interval of operation to clear if op is specified
	*
	* \return pcmk_ok on success, -EINVAL if arguments are invalid
	*
	* \note The caller is responsible for freeing the result with regfree().
	*/
	int
	attrd_failure_regex(regex_t regex, const char rsc, const char *op,
	guint interval_ms)
	{
	char *pattern = NULL;
	int rc;

	/* Create a pattern that matches desired attributes */

	if (rsc == NULL) {
	pattern = strdup(ATTRD_RE_CLEAR_ALL);
	} else if (op == NULL) {
	pattern = crm_strdup_printf(ATTRD_RE_CLEAR_ONE, rsc);
	} else {
	pattern = crm_strdup_printf(ATTRD_RE_CLEAR_OP, rsc, op, interval_ms);
	}

	/* Compile pattern into regular expression */
	crm_trace("Clearing attributes matching %s", pattern);
	rc = regcomp(regex, pattern, REG_EXTENDED\|REG_NOSUB);
	free(pattern);

	return (rc == 0)? pcmk_ok : -EINVAL;
	}
	diff --git a/daemons/attrd/pacemaker-attrd.c b/daemons/attrd/pacemaker-attrd.c
	index d96e666aeb..69d02c0d73 100644
	--- a/daemons/attrd/pacemaker-attrd.c
	+++ b/daemons/attrd/pacemaker-attrd.c
	@@ -1,396 +1,410 @@
	/*
	* Copyright 2013-2018 Andrew Beekhof <andrew@beekhof.net>
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#include <sys/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/common/xml.h>
	#include <crm/cluster/internal.h>

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

	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);
	}
	}

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

	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()
	{
	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:
	+ the_cib->cmds->signoff(the_cib);
	+ cib_delete(the_cib);
	+ the_cib = NULL;
	+ return -ENOTCONN;
	+}
	+
	+/*!
	+ * \internal
	+ * \brief Prepare the CIB after cluster is connected
	+ */
	+static void
	+attrd_cib_init()
	+{
	// 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 -ENOTCONN;
	}

	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 -ENOTCONN;
	}
	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, CRM_EX_OK);
	break;
	default:
	++argerr;
	break;
	}
	}

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

	if (argerr) {
	crm_help('?', CRM_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);

	+ /* 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(10) != 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();

	- if (attrd_cib_connect(10) != pcmk_ok) {
	- attrd_exit_status = CRM_EX_FATAL;
	- goto done;
	- }
	- crm_info("CIB connection active");
	+ /* 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(&ipcs, attrd_ipc_dispatch);
	crm_info("Accepting attribute updates");
	attrd_run_mainloop();

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

	attrd_election_fini();
	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);
	}

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