control.c
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	/*
	* 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 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 <crm/crm.h>

	#include <crm/msg_xml.h>

	#include <crm/pengine/rules.h>
	#include <crm/cluster/internal.h>
	#include <crm/cluster/election.h>
	#include <crm/common/ipcs.h>

	#include <crmd.h>
	#include <crmd_fsa.h>
	#include <fsa_proto.h>
	#include <crmd_messages.h>
	#include <crmd_callbacks.h>
	#include <crmd_lrm.h>
	#include <tengine.h>
	#include <throttle.h>

	#include <sys/types.h>
	#include <sys/stat.h>

	qb_ipcs_service_t *ipcs = NULL;

	extern gboolean crm_connect_corosync(crm_cluster_t * cluster);
	extern void crmd_ha_connection_destroy(gpointer user_data);

	void crm_shutdown(int nsig);
	gboolean crm_read_options(gpointer user_data);

	gboolean fsa_has_quorum = FALSE;
	crm_trigger_t *fsa_source = NULL;
	crm_trigger_t *config_read = NULL;
	bool no_quorum_suicide_escalation = FALSE;

	static gboolean
	election_timeout_popped(gpointer data)
	{
	/* Not everyone voted */
	crm_info("Election failed: Declaring ourselves the winner");
	register_fsa_input(C_TIMER_POPPED, I_ELECTION_DC, NULL);
	return FALSE;
	}

	/* A_HA_CONNECT */
	void
	do_ha_control(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state,
	enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	gboolean registered = FALSE;
	static crm_cluster_t *cluster = NULL;

	if (cluster == NULL) {
	cluster = calloc(1, sizeof(crm_cluster_t));
	}

	if (action & A_HA_DISCONNECT) {
	crm_cluster_disconnect(cluster);
	crm_info("Disconnected from the cluster");

	set_bit(fsa_input_register, R_HA_DISCONNECTED);
	}

	if (action & A_HA_CONNECT) {
	crm_set_status_callback(&peer_update_callback);
	crm_set_autoreap(FALSE);

	if (is_openais_cluster()) {
	#if SUPPORT_COROSYNC
	registered = crm_connect_corosync(cluster);
	#endif
	} else if (is_heartbeat_cluster()) {
	#if SUPPORT_HEARTBEAT
	cluster->destroy = crmd_ha_connection_destroy;
	cluster->hb_dispatch = crmd_ha_msg_callback;

	registered = crm_cluster_connect(cluster);
	fsa_cluster_conn = cluster->hb_conn;

	crm_trace("Be informed of Node Status changes");
	if (registered &&
	fsa_cluster_conn->llc_ops->set_nstatus_callback(fsa_cluster_conn,
	crmd_ha_status_callback,
	fsa_cluster_conn) != HA_OK) {

	crm_err("Cannot set nstatus callback: %s",
	fsa_cluster_conn->llc_ops->errmsg(fsa_cluster_conn));
	registered = FALSE;
	}

	crm_trace("Be informed of CRM Client Status changes");
	if (registered &&
	fsa_cluster_conn->llc_ops->set_cstatus_callback(fsa_cluster_conn,
	crmd_client_status_callback,
	fsa_cluster_conn) != HA_OK) {

	crm_err("Cannot set cstatus callback: %s",
	fsa_cluster_conn->llc_ops->errmsg(fsa_cluster_conn));
	registered = FALSE;
	}

	if (registered) {
	crm_trace("Requesting an initial dump of CRMD client_status");
	fsa_cluster_conn->llc_ops->client_status(fsa_cluster_conn, NULL, CRM_SYSTEM_CRMD,
	-1);
	}
	#endif
	}
	fsa_election = election_init(NULL, cluster->uname, 60000/60s/, election_timeout_popped);
	fsa_our_uname = cluster->uname;
	fsa_our_uuid = cluster->uuid;
	if(cluster->uuid == NULL) {
	crm_err("Could not obtain local uuid");
	registered = FALSE;
	}

	if (registered == FALSE) {
	set_bit(fsa_input_register, R_HA_DISCONNECTED);
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
	return;
	}

	populate_cib_nodes(node_update_none, __FUNCTION__);
	clear_bit(fsa_input_register, R_HA_DISCONNECTED);
	crm_info("Connected to the cluster");
	}

	if (action & ~(A_HA_CONNECT \| A_HA_DISCONNECT)) {
	crm_err("Unexpected action %s in %s", fsa_action2string(action), __FUNCTION__);
	}
	}

	static bool
	need_spawn_pengine_from_crmd(void)
	{
	static int result = -1;

	if (result != -1)
	return result;
	if (!is_heartbeat_cluster()) {
	result = 0;
	return result;
	}

	/* NULL, or "strange" value: rather spawn from here. */
	result = TRUE;
	crm_str_to_boolean(daemon_option("crmd_spawns_pengine"), &result);
	return result;
	}

	/* A_SHUTDOWN */
	void
	do_shutdown(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	/* just in case */
	set_bit(fsa_input_register, R_SHUTDOWN);

	if (need_spawn_pengine_from_crmd()) {
	if (is_set(fsa_input_register, pe_subsystem->flag_connected)) {
	crm_info("Terminating the %s", pe_subsystem->name);
	if (stop_subsystem(pe_subsystem, TRUE) == FALSE) {
	/* its gone... */
	crm_err("Faking %s exit", pe_subsystem->name);
	clear_bit(fsa_input_register, pe_subsystem->flag_connected);
	} else {
	crm_info("Waiting for subsystems to exit");
	crmd_fsa_stall(FALSE);
	}
	}
	crm_info("All subsystems stopped, continuing");
	}

	if (stonith_api) {
	/* Prevent it from coming up again */
	clear_bit(fsa_input_register, R_ST_REQUIRED);

	crm_info("Disconnecting STONITH...");
	stonith_api->cmds->disconnect(stonith_api);
	}
	}

	/* A_SHUTDOWN_REQ */
	void
	do_shutdown_req(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state,
	enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	xmlNode *msg = NULL;

	set_bit(fsa_input_register, R_SHUTDOWN);
	crm_info("Sending shutdown request to all peers (DC is %s)",
	(fsa_our_dc? fsa_our_dc : "not set"));
	msg = create_request(CRM_OP_SHUTDOWN_REQ, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);

	/* set_bit(fsa_input_register, R_STAYDOWN); */
	if (send_cluster_message(NULL, crm_msg_crmd, msg, TRUE) == FALSE) {
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
	}
	free_xml(msg);
	}

	extern crm_ipc_t *attrd_ipc;
	extern char *max_generation_from;
	extern xmlNode *max_generation_xml;
	extern GHashTable *resource_history;
	extern GHashTable *voted;
	extern GHashTable *metadata_hash;
	extern char *te_client_id;

	void log_connected_client(gpointer key, gpointer value, gpointer user_data);

	void
	log_connected_client(gpointer key, gpointer value, gpointer user_data)
	{
	crm_client_t *client = value;

	crm_err("%s is still connected at exit", crm_client_name(client));
	}

	int
	crmd_fast_exit(int rc)
	{
	if (is_set(fsa_input_register, R_STAYDOWN)) {
	crm_warn("Inhibiting respawn "CRM_XS" remapping exit code %d to %d",
	rc, DAEMON_RESPAWN_STOP);
	rc = DAEMON_RESPAWN_STOP;
	}

	if (rc == pcmk_ok && is_set(fsa_input_register, R_IN_RECOVERY)) {
	crm_err("Could not recover from internal error");
	rc = pcmk_err_generic;
	}
	return crm_exit(rc);
	}

	int
	crmd_exit(int rc)
	{
	GListPtr gIter = NULL;
	GMainLoop *mloop = crmd_mainloop;

	static bool in_progress = FALSE;

	if(in_progress && rc == 0) {
	crm_debug("Exit is already in progress");
	return rc;

	} else if(in_progress) {
	crm_notice("Error during shutdown process, terminating now with status %d: %s",
	rc, pcmk_strerror(rc));
	crm_write_blackbox(SIGTRAP, NULL);
	crmd_fast_exit(rc);
	}

	in_progress = TRUE;
	crm_trace("Preparing to exit: %d", rc);

	/* Suppress secondary errors resulting from us disconnecting everything */
	set_bit(fsa_input_register, R_HA_DISCONNECTED);

	/* Close all IPC servers and clients to ensure any and all shared memory files are cleaned up */

	if(ipcs) {
	crm_trace("Closing IPC server");
	mainloop_del_ipc_server(ipcs);
	ipcs = NULL;
	}

	if (attrd_ipc) {
	crm_trace("Closing attrd connection");
	crm_ipc_close(attrd_ipc);
	crm_ipc_destroy(attrd_ipc);
	attrd_ipc = NULL;
	}

	if (pe_subsystem && pe_subsystem->client && pe_subsystem->client->ipcs) {
	crm_trace("Disconnecting Policy Engine");
	qb_ipcs_disconnect(pe_subsystem->client->ipcs);
	}

	if(stonith_api) {
	crm_trace("Disconnecting fencing API");
	clear_bit(fsa_input_register, R_ST_REQUIRED);
	stonith_api->cmds->free(stonith_api); stonith_api = NULL;
	}

	if (rc == pcmk_ok && crmd_mainloop == NULL) {
	crm_debug("No mainloop detected");
	rc = EPROTO;
	}

	/* On an error, just get out.
	*
	* Otherwise, make the effort to have mainloop exit gracefully so
	* that it (mostly) cleans up after itself and valgrind has less
	* to report on - allowing real errors stand out
	*/
	if(rc != pcmk_ok) {
	crm_notice("Forcing immediate exit with status %d: %s",
	rc, pcmk_strerror(rc));
	crm_write_blackbox(SIGTRAP, NULL);
	return crmd_fast_exit(rc);
	}

	/* Clean up as much memory as possible for valgrind */

	for (gIter = fsa_message_queue; gIter != NULL; gIter = gIter->next) {
	fsa_data_t *fsa_data = gIter->data;

	crm_info("Dropping %s: [ state=%s cause=%s origin=%s ]",
	fsa_input2string(fsa_data->fsa_input),
	fsa_state2string(fsa_state),
	fsa_cause2string(fsa_data->fsa_cause), fsa_data->origin);
	delete_fsa_input(fsa_data);
	}

	clear_bit(fsa_input_register, R_MEMBERSHIP);
	g_list_free(fsa_message_queue); fsa_message_queue = NULL;

	free(pe_subsystem); pe_subsystem = NULL;
	free(te_subsystem); te_subsystem = NULL;
	free(cib_subsystem); cib_subsystem = NULL;

	if (metadata_hash) {
	crm_trace("Destroying reload cache with %d members", g_hash_table_size(metadata_hash));
	g_hash_table_destroy(metadata_hash); metadata_hash = NULL;
	}

	election_fini(fsa_election);
	fsa_election = NULL;

	cib_delete(fsa_cib_conn);
	fsa_cib_conn = NULL;

	verify_stopped(fsa_state, LOG_WARNING);
	clear_bit(fsa_input_register, R_LRM_CONNECTED);
	lrm_state_destroy_all();

	/* This basically will not work, since mainloop has a reference to it */
	mainloop_destroy_trigger(fsa_source); fsa_source = NULL;

	mainloop_destroy_trigger(config_read); config_read = NULL;
	mainloop_destroy_trigger(stonith_reconnect); stonith_reconnect = NULL;
	mainloop_destroy_trigger(transition_trigger); transition_trigger = NULL;

	crm_client_cleanup();
	crm_peer_destroy();

	crm_timer_stop(transition_timer);
	crm_timer_stop(integration_timer);
	crm_timer_stop(finalization_timer);
	crm_timer_stop(election_trigger);
	election_timeout_stop(fsa_election);
	crm_timer_stop(shutdown_escalation_timer);
	crm_timer_stop(wait_timer);
	crm_timer_stop(recheck_timer);

	free(transition_timer); transition_timer = NULL;
	free(integration_timer); integration_timer = NULL;
	free(finalization_timer); finalization_timer = NULL;
	free(election_trigger); election_trigger = NULL;
	election_fini(fsa_election);
	free(shutdown_escalation_timer); shutdown_escalation_timer = NULL;
	free(wait_timer); wait_timer = NULL;
	free(recheck_timer); recheck_timer = NULL;

	free(fsa_our_dc_version); fsa_our_dc_version = NULL;
	free(fsa_our_uname); fsa_our_uname = NULL;
	free(fsa_our_uuid); fsa_our_uuid = NULL;
	free(fsa_our_dc); fsa_our_dc = NULL;

	free(fsa_cluster_name); fsa_cluster_name = NULL;

	free(te_uuid); te_uuid = NULL;
	free(te_client_id); te_client_id = NULL;
	free(fsa_pe_ref); fsa_pe_ref = NULL;
	free(failed_stop_offset); failed_stop_offset = NULL;
	free(failed_start_offset); failed_start_offset = NULL;

	free(max_generation_from); max_generation_from = NULL;
	free_xml(max_generation_xml); max_generation_xml = NULL;

	mainloop_destroy_signal(SIGPIPE);
	mainloop_destroy_signal(SIGUSR1);
	mainloop_destroy_signal(SIGTERM);
	mainloop_destroy_signal(SIGTRAP);
	/* leave SIGCHLD engaged as we might still want to drain some service-actions */

	if (mloop) {
	GMainContext *ctx = g_main_loop_get_context(crmd_mainloop);

	/* Don't re-enter this block */
	crmd_mainloop = NULL;

	crmd_drain_alerts(ctx);

	/* no signals on final draining anymore */
	mainloop_destroy_signal(SIGCHLD);

	crm_trace("Draining mainloop %d %d", g_main_loop_is_running(mloop), g_main_context_pending(ctx));

	{
	int lpc = 0;

	while((g_main_context_pending(ctx) && lpc < 10)) {
	lpc++;
	crm_trace("Iteration %d", lpc);
	g_main_context_dispatch(ctx);
	}
	}

	crm_trace("Closing mainloop %d %d", g_main_loop_is_running(mloop), g_main_context_pending(ctx));
	g_main_loop_quit(mloop);

	#if SUPPORT_HEARTBEAT
	/* Do this only after g_main_loop_quit().
	*
	* This interface was broken (incomplete) since it was introduced.
	* ->delete() does cleanup and free most of it, but it does not
	* actually remove and destroy the corresponding GSource, so the next
	* prepare/check iteratioin would find a corrupt (because partially
	* freed) GSource, and segfault.
	*
	* Apparently one was supposed to store the GSource as returned by
	* G_main_add_ll_cluster(), and g_source_destroy() that "by hand".
	*
	* But no-one ever did this, not even in the old hb code when this was
	* introduced.
	*
	* Note that fsa_cluster_conn was set as an "alias" to cluster->hb_conn
	* in do_ha_control() right after crm_cluster_connect(), and only
	* happens to still point at that object, because do_ha_control() does
	* not reset it to NULL after crm_cluster_disconnect() above does
	* reset cluster->hb_conn to NULL.
	* Not sure if that's something to cleanup, too.
	*
	* I'll try to fix this up in heartbeat proper, so ->delete
	* will actually remove, and destroy, and unref, and free this thing.
	* Doing so after g_main_loop_quit() is valid with both old,
	* and eventually fixed heartbeat.
	*
	* If we introduce the "by hand" destroy/remove/unref,
	* this may break again once heartbeat is fixed :-(
	*
	* -- Lars Ellenberg
	*/
	if (fsa_cluster_conn) {
	crm_trace("Deleting heartbeat api object");
	fsa_cluster_conn->llc_ops->delete(fsa_cluster_conn);
	fsa_cluster_conn = NULL;
	}
	#endif

	/* Won't do anything yet, since we're inside it now */
	g_main_loop_unref(mloop);

	crm_trace("Done %d", rc);
	} else {
	mainloop_destroy_signal(SIGCHLD);
	}

	/* Graceful */
	return rc;
	}

	/* A_EXIT_0, A_EXIT_1 */
	void
	do_exit(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	int exit_code = pcmk_ok;
	int log_level = LOG_INFO;
	const char *exit_type = "gracefully";

	if (action & A_EXIT_1) {
	/* exit_code = pcmk_err_generic; */
	log_level = LOG_ERR;
	exit_type = "forcefully";
	exit_code = pcmk_err_generic;
	}

	verify_stopped(cur_state, LOG_ERR);
	do_crm_log(log_level, "Performing %s - %s exiting the CRMd",
	fsa_action2string(action), exit_type);

	crm_info("[%s] stopped (%d)", crm_system_name, exit_code);
	crmd_exit(exit_code);
	}

	static void sigpipe_ignore(int nsig) { return; }

	/* A_STARTUP */
	void
	do_startup(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	int was_error = 0;

	crm_debug("Registering Signal Handlers");
	mainloop_add_signal(SIGTERM, crm_shutdown);
	mainloop_add_signal(SIGPIPE, sigpipe_ignore);

	fsa_source = mainloop_add_trigger(G_PRIORITY_HIGH, crm_fsa_trigger, NULL);
	config_read = mainloop_add_trigger(G_PRIORITY_HIGH, crm_read_options, NULL);
	transition_trigger = mainloop_add_trigger(G_PRIORITY_LOW, te_graph_trigger, NULL);

	crm_debug("Creating CIB and LRM objects");
	fsa_cib_conn = cib_new();

	lrm_state_init_local();

	/* set up the timers */
	transition_timer = calloc(1, sizeof(fsa_timer_t));
	integration_timer = calloc(1, sizeof(fsa_timer_t));
	finalization_timer = calloc(1, sizeof(fsa_timer_t));
	election_trigger = calloc(1, sizeof(fsa_timer_t));
	shutdown_escalation_timer = calloc(1, sizeof(fsa_timer_t));
	wait_timer = calloc(1, sizeof(fsa_timer_t));
	recheck_timer = calloc(1, sizeof(fsa_timer_t));

	if (election_trigger != NULL) {
	election_trigger->source_id = 0;
	election_trigger->period_ms = -1;
	election_trigger->fsa_input = I_DC_TIMEOUT;
	election_trigger->callback = crm_timer_popped;
	election_trigger->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	if (transition_timer != NULL) {
	transition_timer->source_id = 0;
	transition_timer->period_ms = -1;
	transition_timer->fsa_input = I_PE_CALC;
	transition_timer->callback = crm_timer_popped;
	transition_timer->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	if (integration_timer != NULL) {
	integration_timer->source_id = 0;
	integration_timer->period_ms = -1;
	integration_timer->fsa_input = I_INTEGRATED;
	integration_timer->callback = crm_timer_popped;
	integration_timer->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	if (finalization_timer != NULL) {
	finalization_timer->source_id = 0;
	finalization_timer->period_ms = -1;
	finalization_timer->fsa_input = I_FINALIZED;
	finalization_timer->callback = crm_timer_popped;
	finalization_timer->repeat = FALSE;
	/* for possible enabling... a bug in the join protocol left
	* a slave in S_PENDING while we think its in S_NOT_DC
	*
	* raising I_FINALIZED put us into a transition loop which is
	* never resolved.
	* in this loop we continually send probes which the node
	* NACK's because its in S_PENDING
	*
	* if we have nodes where heartbeat is active but the
	* CRM is not... then this will be handled in the
	* integration phase
	*/
	finalization_timer->fsa_input = I_ELECTION;

	} else {
	was_error = TRUE;
	}

	if (shutdown_escalation_timer != NULL) {
	shutdown_escalation_timer->source_id = 0;
	shutdown_escalation_timer->period_ms = -1;
	shutdown_escalation_timer->fsa_input = I_STOP;
	shutdown_escalation_timer->callback = crm_timer_popped;
	shutdown_escalation_timer->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	if (wait_timer != NULL) {
	wait_timer->source_id = 0;
	wait_timer->period_ms = 2000;
	wait_timer->fsa_input = I_NULL;
	wait_timer->callback = crm_timer_popped;
	wait_timer->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	if (recheck_timer != NULL) {
	recheck_timer->source_id = 0;
	recheck_timer->period_ms = -1;
	recheck_timer->fsa_input = I_PE_CALC;
	recheck_timer->callback = crm_timer_popped;
	recheck_timer->repeat = FALSE;
	} else {
	was_error = TRUE;
	}

	/* set up the sub systems */
	cib_subsystem = calloc(1, sizeof(struct crm_subsystem_s));
	te_subsystem = calloc(1, sizeof(struct crm_subsystem_s));
	pe_subsystem = calloc(1, sizeof(struct crm_subsystem_s));

	if (cib_subsystem != NULL) {
	cib_subsystem->pid = -1;
	cib_subsystem->name = CRM_SYSTEM_CIB;
	cib_subsystem->flag_connected = R_CIB_CONNECTED;
	cib_subsystem->flag_required = R_CIB_REQUIRED;

	} else {
	was_error = TRUE;
	}

	if (te_subsystem != NULL) {
	te_subsystem->pid = -1;
	te_subsystem->name = CRM_SYSTEM_TENGINE;
	te_subsystem->flag_connected = R_TE_CONNECTED;
	te_subsystem->flag_required = R_TE_REQUIRED;

	} else {
	was_error = TRUE;
	}

	if (pe_subsystem != NULL) {
	pe_subsystem->pid = -1;
	pe_subsystem->path = CRM_DAEMON_DIR;
	pe_subsystem->name = CRM_SYSTEM_PENGINE;
	pe_subsystem->command = CRM_DAEMON_DIR "/" CRM_SYSTEM_PENGINE;
	pe_subsystem->args = NULL;
	pe_subsystem->flag_connected = R_PE_CONNECTED;
	pe_subsystem->flag_required = R_PE_REQUIRED;

	} else {
	was_error = TRUE;
	}

	if (was_error == FALSE && need_spawn_pengine_from_crmd()) {
	if (start_subsystem(pe_subsystem) == FALSE) {
	was_error = TRUE;
	}
	}

	if (was_error) {
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
	}

	}

	static int32_t
	crmd_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
	{
	crm_trace("Connection %p", c);
	if (crm_client_new(c, uid, gid) == NULL) {
	return -EIO;
	}
	return 0;
	}

	static void
	crmd_ipc_created(qb_ipcs_connection_t * c)
	{
	crm_trace("Connection %p", c);
	}

	static int32_t
	crmd_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 *msg = crm_ipcs_recv(client, data, size, &id, &flags);

	crm_trace("Invoked: %s", crm_client_name(client));
	crm_ipcs_send_ack(client, id, flags, "ack", __FUNCTION__, __LINE__);

	if (msg == NULL) {
	return 0;
	}

	#if ENABLE_ACL
	CRM_ASSERT(client->user != NULL);
	crm_acl_get_set_user(msg, F_CRM_USER, client->user);
	#endif

	crm_trace("Processing msg from %s", crm_client_name(client));
	crm_log_xml_trace(msg, "CRMd[inbound]");

	crm_xml_add(msg, F_CRM_SYS_FROM, client->id);
	if (crmd_authorize_message(msg, client, NULL)) {
	route_message(C_IPC_MESSAGE, msg);
	}

	trigger_fsa(fsa_source);
	free_xml(msg);
	return 0;
	}

	static int32_t
	crmd_ipc_closed(qb_ipcs_connection_t * c)
	{
	crm_client_t *client = crm_client_get(c);
	struct crm_subsystem_s *the_subsystem = NULL;

	if (client == NULL) {
	return 0;
	}

	crm_trace("Connection %p", c);

	if (client->userdata == NULL) {
	crm_trace("Client hadn't registered with us yet");

	} else if (strcasecmp(CRM_SYSTEM_PENGINE, client->userdata) == 0) {
	the_subsystem = pe_subsystem;

	} else if (strcasecmp(CRM_SYSTEM_TENGINE, client->userdata) == 0) {
	the_subsystem = te_subsystem;

	} else if (strcasecmp(CRM_SYSTEM_CIB, client->userdata) == 0) {
	the_subsystem = cib_subsystem;
	}

	if (the_subsystem != NULL) {
	the_subsystem->source = NULL;
	the_subsystem->client = NULL;
	crm_info("Received HUP from %s:[%d]", the_subsystem->name, the_subsystem->pid);

	} else {
	/* else that was a transient client */
	crm_trace("Received HUP from transient client");
	}

	crm_trace("Disconnecting client %s (%p)", crm_client_name(client), client);
	free(client->userdata);
	crm_client_destroy(client);

	trigger_fsa(fsa_source);
	return 0;
	}

	static void
	crmd_ipc_destroy(qb_ipcs_connection_t * c)
	{
	crm_trace("Connection %p", c);
	crmd_ipc_closed(c);
	}

	/* A_STOP */
	void
	do_stop(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	crm_trace("Closing IPC server");
	mainloop_del_ipc_server(ipcs); ipcs = NULL;
	register_fsa_input(C_FSA_INTERNAL, I_TERMINATE, NULL);
	}

	/* A_STARTED */
	void
	do_started(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	static struct qb_ipcs_service_handlers crmd_callbacks = {
	.connection_accept = crmd_ipc_accept,
	.connection_created = crmd_ipc_created,
	.msg_process = crmd_ipc_dispatch,
	.connection_closed = crmd_ipc_closed,
	.connection_destroyed = crmd_ipc_destroy
	};

	if (cur_state != S_STARTING) {
	crm_err("Start cancelled... %s", fsa_state2string(cur_state));
	return;

	} else if (is_set(fsa_input_register, R_MEMBERSHIP) == FALSE) {
	crm_info("Delaying start, no membership data (%.16llx)", R_MEMBERSHIP);

	crmd_fsa_stall(TRUE);
	return;

	} else if (is_set(fsa_input_register, R_LRM_CONNECTED) == FALSE) {
	crm_info("Delaying start, LRM not connected (%.16llx)", R_LRM_CONNECTED);

	crmd_fsa_stall(TRUE);
	return;

	} else if (is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) {
	crm_info("Delaying start, CIB not connected (%.16llx)", R_CIB_CONNECTED);

	crmd_fsa_stall(TRUE);
	return;

	} else if (is_set(fsa_input_register, R_READ_CONFIG) == FALSE) {
	crm_info("Delaying start, Config not read (%.16llx)", R_READ_CONFIG);

	crmd_fsa_stall(TRUE);
	return;

	} else if (is_set(fsa_input_register, R_PEER_DATA) == FALSE) {

	/* try reading from HA */
	crm_info("Delaying start, No peer data (%.16llx)", R_PEER_DATA);

	#if SUPPORT_HEARTBEAT
	if (is_heartbeat_cluster()) {
	HA_Message *msg = NULL;

	crm_trace("Looking for a HA message");
	msg = fsa_cluster_conn->llc_ops->readmsg(fsa_cluster_conn, 0);
	if (msg != NULL) {
	crm_trace("There was a HA message");
	ha_msg_del(msg);
	}
	}
	#endif
	crmd_fsa_stall(TRUE);
	return;
	}

	crm_debug("Init server comms");
	ipcs = crmd_ipc_server_init(&crmd_callbacks);
	if (ipcs == NULL) {
	crm_err("Failed to create IPC server: shutting down and inhibiting respawn");
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
	}

	if (stonith_reconnect == NULL) {
	int dummy;

	stonith_reconnect = mainloop_add_trigger(G_PRIORITY_LOW, te_connect_stonith, &dummy);
	}
	set_bit(fsa_input_register, R_ST_REQUIRED);
	mainloop_set_trigger(stonith_reconnect);

	crm_notice("The local CRM is operational");
	clear_bit(fsa_input_register, R_STARTING);
	register_fsa_input(msg_data->fsa_cause, I_PENDING, NULL);
	}

	/* A_RECOVER */
	void
	do_recover(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	set_bit(fsa_input_register, R_IN_RECOVERY);
	crm_warn("Fast-tracking shutdown in response to errors");

	register_fsa_input(C_FSA_INTERNAL, I_TERMINATE, NULL);
	}

	/* INDENT-OFF */
	pe_cluster_option crmd_opts[] = {
	/* name, old-name, validate, values, default, short description, long description */
	{ "dc-version", NULL, "string", NULL, "none", NULL,
	"Version of Pacemaker on the cluster's DC.",
	"Includes the hash which identifies the exact changeset it was built from. Used for diagnostic purposes."
	},
	{ "cluster-infrastructure", NULL, "string", NULL, "heartbeat", NULL,
	"The messaging stack on which Pacemaker is currently running.",
	"Used for informational and diagnostic purposes." },
	{ XML_CONFIG_ATTR_DC_DEADTIME, "dc_deadtime", "time", NULL, "20s", &check_time,
	"How long to wait for a response from other nodes during startup.",
	"The \"correct\" value will depend on the speed/load of your network and the type of switches used."
	},
	{ XML_CONFIG_ATTR_RECHECK, "cluster_recheck_interval", "time",
	"Zero disables polling. Positive values are an interval in seconds (unless other SI units are specified. eg. 5min)",
	"15min", &check_timer,
	"Polling interval for time based changes to options, resource parameters and constraints.",
	"The Cluster is primarily event driven, however the configuration can have elements that change based on time."
	" To ensure these changes take effect, we can optionally poll the cluster's status for changes."
	},

	#ifdef RHEL7_COMPAT
	/* These options were superseded by the alerts feature and now are just an
	* alternate interface to it. It was never released upstream, but was
	* released in RHEL 7, so we allow it to be enabled at compile-time by
	* defining RHEL7_COMPAT.
	*/
	{ "notification-agent", NULL, "string", NULL, "/dev/null", &check_script,
	"Deprecated",
	"Use alert path in alerts section instead"
	},
	{ "notification-recipient", NULL, "string", NULL, "", NULL,
	"Deprecated",
	"Use recipient value in alerts section instead"
	},
	#endif

	{ "load-threshold", NULL, "percentage", NULL, "80%", &check_utilization,
	"The maximum amount of system resources that should be used by nodes in the cluster",
	"The cluster will slow down its recovery process when the amount of system resources used"
	" (currently CPU) approaches this limit",
	},
	{ "node-action-limit", NULL, "integer", NULL, "0", &check_number,
	"The maximum number of jobs that can be scheduled per node. Defaults to 2x cores"},
	{ XML_CONFIG_ATTR_ELECTION_FAIL, "election_timeout", "time", NULL, "2min", &check_timer,
	"* Advanced Use Only *.", "If need to adjust this value, it probably indicates the presence of a bug."
	},
	{ XML_CONFIG_ATTR_FORCE_QUIT, "shutdown_escalation", "time", NULL, "20min", &check_timer,
	"* Advanced Use Only *.", "If need to adjust this value, it probably indicates the presence of a bug."
	},
	{ "crmd-integration-timeout", NULL, "time", NULL, "3min", &check_timer,
	"* Advanced Use Only *.", "If need to adjust this value, it probably indicates the presence of a bug."
	},
	{ "crmd-finalization-timeout", NULL, "time", NULL, "30min", &check_timer,
	"* Advanced Use Only *.", "If you need to adjust this value, it probably indicates the presence of a bug."
	},
	{ "crmd-transition-delay", NULL, "time", NULL, "0s", &check_timer,
	"* Advanced Use Only *\n"
	"Enabling this option will slow down cluster recovery under all conditions",
	"Delay cluster recovery for the configured interval to allow for additional/related events to occur.\n"
	"Useful if your configuration is sensitive to the order in which ping updates arrive."
	},
	{ "stonith-watchdog-timeout", NULL, "time", NULL, NULL, &check_sbd_timeout,
	"How long to wait before we can assume nodes are safely down", NULL
	},
	{ "no-quorum-policy", "no_quorum_policy", "enum", "stop, freeze, ignore, suicide", "stop", &check_quorum, NULL, NULL },

	#if SUPPORT_PLUGIN
	{ XML_ATTR_EXPECTED_VOTES, NULL, "integer", NULL, "2", &check_number, "The number of nodes expected to be in the cluster", "Used to calculate quorum in openais based clusters." },
	#endif
	};
	/* INDENT-ON */

	void
	crmd_metadata(void)
	{
	config_metadata("CRM Daemon", "1.0",
	"CRM Daemon Options",
	"This is a fake resource that details the options that can be configured for the CRM Daemon.",
	crmd_opts, DIMOF(crmd_opts));
	}

	static void
	verify_crmd_options(GHashTable * options)
	{
	verify_all_options(options, crmd_opts, DIMOF(crmd_opts));
	}

	static const char *
	crmd_pref(GHashTable * options, const char *name)
	{
	return get_cluster_pref(options, crmd_opts, DIMOF(crmd_opts), name);
	}

	static void
	config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
	{
	#ifdef RHEL7_COMPAT
	const char *script = NULL;
	#endif
	const char *value = NULL;
	GHashTable *config_hash = NULL;
	crm_time_t *now = crm_time_new(NULL);
	xmlNode *crmconfig = NULL;
	xmlNode *alerts = NULL;

	if (rc != pcmk_ok) {
	fsa_data_t *msg_data = NULL;

	crm_err("Local CIB query resulted in an error: %s", pcmk_strerror(rc));
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);

	if (rc == -EACCES \|\| rc == -pcmk_err_schema_validation) {
	crm_err("The cluster is mis-configured - shutting down and staying down");
	set_bit(fsa_input_register, R_STAYDOWN);
	}
	goto bail;
	}

	crmconfig = output;
	if ((crmconfig) &&
	(crm_element_name(crmconfig)) &&
	(strcmp(crm_element_name(crmconfig), XML_CIB_TAG_CRMCONFIG) != 0)) {
	crmconfig = first_named_child(crmconfig, XML_CIB_TAG_CRMCONFIG);
	}
	if (!crmconfig) {
	fsa_data_t *msg_data = NULL;

	crm_err("Local CIB query for " XML_CIB_TAG_CRMCONFIG " section failed");
	register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
	goto bail;
	}

	crm_debug("Call %d : Parsing CIB options", call_id);
	config_hash =
	g_hash_table_new_full(crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str);

	unpack_instance_attributes(crmconfig, crmconfig, XML_CIB_TAG_PROPSET, NULL, config_hash,
	CIB_OPTIONS_FIRST, FALSE, now);

	verify_crmd_options(config_hash);

	#ifdef RHEL7_COMPAT
	script = crmd_pref(config_hash, "notification-agent");
	value = crmd_pref(config_hash, "notification-recipient");
	crmd_enable_notifications(script, value);
	#endif

	value = crmd_pref(config_hash, XML_CONFIG_ATTR_DC_DEADTIME);
	election_trigger->period_ms = crm_get_msec(value);

	value = crmd_pref(config_hash, "node-action-limit"); /* Also checks migration-limit */
	throttle_update_job_max(value);

	value = crmd_pref(config_hash, "load-threshold");
	if(value) {
	throttle_load_target = strtof(value, NULL) / 100;
	}

	value = crmd_pref(config_hash, "no-quorum-policy");
	if (safe_str_eq(value, "suicide") && pcmk_locate_sbd()) {
	no_quorum_suicide_escalation = TRUE;
	}

	value = crmd_pref(config_hash, XML_CONFIG_ATTR_FORCE_QUIT);
	shutdown_escalation_timer->period_ms = crm_get_msec(value);
	/* How long to declare an election over - even if not everyone voted */
	crm_debug("Shutdown escalation occurs after: %dms", shutdown_escalation_timer->period_ms);

	value = crmd_pref(config_hash, XML_CONFIG_ATTR_ELECTION_FAIL);
	election_timeout_set_period(fsa_election, crm_get_msec(value));

	value = crmd_pref(config_hash, XML_CONFIG_ATTR_RECHECK);
	recheck_timer->period_ms = crm_get_msec(value);
	crm_debug("Checking for expired actions every %dms", recheck_timer->period_ms);

	value = crmd_pref(config_hash, "crmd-transition-delay");
	transition_timer->period_ms = crm_get_msec(value);

	value = crmd_pref(config_hash, "crmd-integration-timeout");
	integration_timer->period_ms = crm_get_msec(value);

	value = crmd_pref(config_hash, "crmd-finalization-timeout");
	finalization_timer->period_ms = crm_get_msec(value);

	#if SUPPORT_COROSYNC
	if (is_classic_ais_cluster()) {
	value = crmd_pref(config_hash, XML_ATTR_EXPECTED_VOTES);
	crm_debug("Sending expected-votes=%s to corosync", value);
	send_cluster_text(crm_class_quorum, value, TRUE, NULL, crm_msg_ais);
	}
	#endif

	free(fsa_cluster_name);
	fsa_cluster_name = NULL;

	value = g_hash_table_lookup(config_hash, "cluster-name");
	if (value) {
	fsa_cluster_name = strdup(value);
	}

	alerts = first_named_child(output, XML_CIB_TAG_ALERTS);
	parse_notifications(alerts);

	set_bit(fsa_input_register, R_READ_CONFIG);
	crm_trace("Triggering FSA: %s", __FUNCTION__);
	mainloop_set_trigger(fsa_source);

	g_hash_table_destroy(config_hash);
	bail:
	crm_time_free(now);
	}

	gboolean
	crm_read_options(gpointer user_data)
	{
	int call_id =
	fsa_cib_conn->cmds->query(fsa_cib_conn,
	"//" XML_CIB_TAG_CRMCONFIG " \| //" XML_CIB_TAG_ALERTS,
	NULL, cib_xpath \| cib_scope_local);

	fsa_register_cib_callback(call_id, FALSE, NULL, config_query_callback);
	crm_trace("Querying the CIB... call %d", call_id);
	return TRUE;
	}

	/* A_READCONFIG */
	void
	do_read_config(long long action,
	enum crmd_fsa_cause cause,
	enum crmd_fsa_state cur_state,
	enum crmd_fsa_input current_input, fsa_data_t * msg_data)
	{
	throttle_init();
	mainloop_set_trigger(config_read);
	}

	void
	crm_shutdown(int nsig)
	{
	if (crmd_mainloop != NULL && g_main_is_running(crmd_mainloop)) {
	if (is_set(fsa_input_register, R_SHUTDOWN)) {
	crm_err("Escalating the shutdown");
	register_fsa_input_before(C_SHUTDOWN, I_ERROR, NULL);

	} else {
	set_bit(fsa_input_register, R_SHUTDOWN);
	register_fsa_input(C_SHUTDOWN, I_SHUTDOWN, NULL);

	if (shutdown_escalation_timer->period_ms < 1) {
	const char *value = crmd_pref(NULL, XML_CONFIG_ATTR_FORCE_QUIT);
	int msec = crm_get_msec(value);

	crm_debug("Using default shutdown escalation: %dms", msec);
	shutdown_escalation_timer->period_ms = msec;
	}

	/* can't rely on this... */
	crm_notice("Shutting down cluster resource manager " CRM_XS
	" limit=%dms", shutdown_escalation_timer->period_ms);
	crm_timer_start(shutdown_escalation_timer);
	}

	} else {
	crm_info("exit from shutdown");
	crmd_exit(pcmk_ok);
	}
	}

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