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	diff --git a/fencing/commands.c b/fencing/commands.c
	index 4b378ba883..213246e53a 100644
	--- a/fencing/commands.c
	+++ b/fencing/commands.c
	@@ -1,1883 +1,1883 @@
	/*
	* Copyright (C) 2009 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/wait.h>
	#include <sys/stat.h>
	#include <unistd.h>
	#include <sys/utsname.h>

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

	#include <crm/crm.h>
	#include <crm/msg_xml.h>
	#include <crm/common/ipc.h>
	#include <crm/cluster/internal.h>
	#include <crm/common/mainloop.h>

	#include <crm/stonith-ng.h>
	#include <crm/fencing/internal.h>
	#include <crm/common/xml.h>

	#include <internal.h>

	GHashTable *device_list = NULL;
	GHashTable *topology = NULL;
	GList *cmd_list = NULL;

	static int active_children = 0;

	struct device_search_s
	{
	char *host;
	char *action;
	int per_device_timeout;
	int replies_needed;
	int replies_received;

	void *user_data;
	void (callback) (GList devices, void *user_data);
	GListPtr capable;
	};

	static gboolean stonith_device_dispatch(gpointer user_data);
	static void st_child_done(GPid pid, int rc, const char *output, gpointer user_data);
	static void
	stonith_send_reply(xmlNode reply, int call_options, const char remote_peer, const char *client_id);

	static void search_devices_record_result(struct device_search_s search, const char device, gboolean can_fence);

	typedef struct async_command_s {

	int id;
	int pid;
	int fd_stdout;
	int options;
	int default_timeout;
	int timeout;

	char *op;
	char *origin;
	char *client;
	char *client_name;
	char *remote_op_id;

	char *victim;
	char *action;
	char *device;
	char *mode;

	GListPtr device_list;
	GListPtr device_next;

	void *internal_user_data;
	void (done_cb)(GPid pid, int rc, const char output, gpointer user_data);
	guint timer_sigterm;
	guint timer_sigkill;
	/*! If the operation timed out, this is the last signal
	* we sent to the process to get it to terminate */
	int last_timeout_signo;
	} async_command_t;

	static xmlNode *
	stonith_construct_async_reply(async_command_t cmd, const char output, xmlNode *data, int rc);

	static int
	get_action_timeout(stonith_device_t device, const char action, int default_timeout)
	{
	char buffer[512] = { 0, };
	char *value = NULL;

	CRM_CHECK(action != NULL, return default_timeout);

	if (!device->params) {
	return default_timeout;
	}

	snprintf(buffer, sizeof(buffer) - 1, "pcmk_%s_timeout", action);
	value = g_hash_table_lookup(device->params, buffer);

	if (!value) {
	return default_timeout;
	}

	return atoi(value);
	}

	static void free_async_command(async_command_t *cmd)
	{
	if (!cmd) {
	return;
	}
	cmd_list = g_list_remove(cmd_list, cmd);

	g_list_free_full(cmd->device_list, free);
	free(cmd->device);
	free(cmd->action);
	free(cmd->victim);
	free(cmd->remote_op_id);
	free(cmd->client);
	free(cmd->client_name);
	free(cmd->origin);
	free(cmd->op);
	free(cmd);
	}

	static async_command_t create_async_command(xmlNode msg)
	{
	async_command_t *cmd = NULL;
	xmlNode *op = get_xpath_object("//@"F_STONITH_ACTION, msg, LOG_ERR);
	const char *action = crm_element_value(op, F_STONITH_ACTION);

	CRM_CHECK(action != NULL, crm_log_xml_warn(msg, "NoAction"); return NULL);

	crm_log_xml_trace(msg, "Command");
	cmd = calloc(1, sizeof(async_command_t));
	crm_element_value_int(msg, F_STONITH_CALLID, &(cmd->id));
	crm_element_value_int(msg, F_STONITH_CALLOPTS, &(cmd->options));
	crm_element_value_int(msg, F_STONITH_TIMEOUT, &(cmd->default_timeout));
	cmd->timeout = cmd->default_timeout;

	cmd->origin = crm_element_value_copy(msg, F_ORIG);
	cmd->remote_op_id = crm_element_value_copy(msg, F_STONITH_REMOTE_OP_ID);
	cmd->client = crm_element_value_copy(msg, F_STONITH_CLIENTID);
	cmd->client_name = crm_element_value_copy(msg, F_STONITH_CLIENTNAME);
	cmd->op = crm_element_value_copy(msg, F_STONITH_OPERATION);
	cmd->action = strdup(action);
	cmd->victim = crm_element_value_copy(op, F_STONITH_TARGET);
	cmd->mode = crm_element_value_copy(op, F_STONITH_MODE);
	cmd->device = crm_element_value_copy(op, F_STONITH_DEVICE);

	CRM_CHECK(cmd->op != NULL, crm_log_xml_warn(msg, "NoOp"); free_async_command(cmd); return NULL);
	CRM_CHECK(cmd->client != NULL, crm_log_xml_warn(msg, "NoClient"));

	cmd->done_cb = st_child_done;
	cmd_list = g_list_append(cmd_list, cmd);
	return cmd;
	}

	static int stonith_manual_ack(xmlNode msg, remote_fencing_op_t op)
	{
	async_command_t *cmd = create_async_command(msg);
	xmlNode *dev = get_xpath_object("//@"F_STONITH_TARGET, msg, LOG_ERR);

	if(cmd == NULL) {
	return -EINVAL;
	}

	cmd->device = strdup("manual_ack");
	cmd->remote_op_id = strdup(op->id);

	crm_notice("Injecting manual confirmation that %s is safely off/down",
	crm_element_value(dev, F_STONITH_TARGET));

	cmd->done_cb(0, 0, NULL, cmd);
	return pcmk_ok;
	}

	static gboolean stonith_device_execute(stonith_device_t *device)
	{
	int exec_rc = 0;
	async_command_t *cmd = NULL;
	stonith_action_t *action = NULL;
	CRM_CHECK(device != NULL, return FALSE);

	if(device->active_pid) {
	crm_trace("%s is still active with pid %u", device->id, device->active_pid);
	return TRUE;
	}

	if(device->pending_ops) {
	GList *first = device->pending_ops;
	device->pending_ops = g_list_remove_link(device->pending_ops, first);
	cmd = first->data;
	g_list_free_1(first);
	}

	if(cmd == NULL) {
	crm_trace("Nothing further to do for %s", device->id);
	return TRUE;
	}

	action = stonith_action_create(device->agent,
	cmd->action,
	cmd->victim,
	cmd->timeout,
	device->params,
	device->aliases);

	/* for async exec, exec_rc is pid if positive and error code if negative/zero */
	exec_rc = stonith_action_execute_async(action, (void *) cmd, cmd->done_cb);

	if(exec_rc > 0) {
	crm_debug("Operation %s%s%s on %s now running with pid=%d, timeout=%dms",
	cmd->action, cmd->victim?" for node ":"", cmd->victim?cmd->victim:"",
	device->id, exec_rc, cmd->timeout);
	device->active_pid = exec_rc;

	} else {
	crm_warn("Operation %s%s%s on %s failed: %s (%d)",
	cmd->action, cmd->victim?" for node ":"", cmd->victim?cmd->victim:"",
	device->id, pcmk_strerror(exec_rc), exec_rc);
	cmd->done_cb(0, exec_rc, NULL, cmd);
	}
	return TRUE;
	}

	static gboolean stonith_device_dispatch(gpointer user_data)
	{
	return stonith_device_execute(user_data);
	}

	static void schedule_stonith_command(async_command_t cmd, stonith_device_t device)
	{
	CRM_CHECK(cmd != NULL, return);
	CRM_CHECK(device != NULL, return);

	if (cmd->device) {
	free(cmd->device);
	}

	cmd->device = strdup(device->id);
	cmd->timeout = get_action_timeout(device, cmd->action, cmd->default_timeout);

	if (cmd->remote_op_id) {
	crm_debug("Scheduling %s on %s for remote peer %s with op id (%s) (timeout=%ds)",
	cmd->action,
	device->id,
	cmd->origin,
	cmd->remote_op_id,
	cmd->timeout);
	} else {
	crm_debug("Scheduling %s on %s for %s (timeout=%ds)",
	cmd->action,
	device->id,
	cmd->client,
	cmd->timeout);
	}

	device->pending_ops = g_list_append(device->pending_ops, cmd);
	mainloop_set_trigger(device->work);
	}

	void free_device(gpointer data)
	{
	GListPtr gIter = NULL;
	stonith_device_t *device = data;

	g_hash_table_destroy(device->params);
	g_hash_table_destroy(device->aliases);

	for(gIter = device->pending_ops; gIter != NULL; gIter = gIter->next) {
	async_command_t *cmd = gIter->data;

	crm_warn("Removal of device '%s' purged operation %s", device->id, cmd->action);
	cmd->done_cb(0, -ENODEV, NULL, cmd);
	free_async_command(cmd);
	}
	g_list_free(device->pending_ops);

	g_list_free_full(device->targets, free);
	free(device->namespace);
	free(device->on_target_actions);
	free(device->agent);
	free(device->id);
	free(device);
	}

	static GHashTable build_port_aliases(const char hostmap, GListPtr *targets)
	{
	char *name = NULL;
	int last = 0, lpc = 0, max = 0, added = 0;
	GHashTable *aliases = g_hash_table_new_full(crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str);

	if(hostmap == NULL) {
	return aliases;
	}

	max = strlen(hostmap);
	for(; lpc <= max; lpc++) {
	switch(hostmap[lpc]) {
	/* Assignment chars */
	case '=':
	case ':':
	if(lpc > last) {
	free(name);
	name = calloc(1, 1 + lpc - last);
	memcpy(name, hostmap + last, lpc - last);
	}
	last = lpc + 1;
	break;

	/* Delimeter chars */
	/* case ',': Potentially used to specify multiple ports */
	case 0:
	case ';':
	case ' ':
	case '\t':
	if(name) {
	char *value = NULL;
	value = calloc(1, 1 + lpc - last);
	memcpy(value, hostmap + last, lpc - last);

	crm_debug("Adding alias '%s'='%s'", name, value);
	g_hash_table_replace(aliases, name, value);
	if(targets) {
	targets = g_list_append(targets, strdup(value));
	}
	value=NULL;
	name=NULL;
	added++;

	} else if(lpc > last) {
	crm_debug("Parse error at offset %d near '%s'", lpc-last, hostmap+last);
	}

	last = lpc + 1;
	break;
	}

	if(hostmap[lpc] == 0) {
	break;
	}
	}

	if(added == 0) {
	crm_info("No host mappings detected in '%s'", hostmap);
	}

	free(name);
	return aliases;
	}

	static void parse_host_line(const char line, GListPtr output)
	{
	int lpc = 0;
	int max = 0;
	int last = 0;

	if(line) {
	max = strlen(line);
	} else {
	return;
	}

	/* Check for any complaints about additional parameters that the device doesn't understand */
	if(strstr(line, "invalid") \|\| strstr(line, "variable")) {
	crm_debug("Skipping: %s", line);
	return;
	}

	crm_trace("Processing: %s", line);
	/* Skip initial whitespace */
	for(lpc = 0; lpc <= max && isspace(line[lpc]); lpc++) {
	last = lpc+1;
	}

	/* Now the actual content */
	for(lpc = 0; lpc <= max; lpc++) {
	gboolean a_space = isspace(line[lpc]);
	if(a_space && lpc < max && isspace(line[lpc+1])) {
	/* fast-forward to the end of the spaces */

	} else if(a_space \|\| line[lpc] == ',' \|\| line[lpc] == 0) {
	int rc = 1;
	char *entry = NULL;

	if(lpc != last) {
	entry = calloc(1, 1 + lpc - last);
	rc = sscanf(line+last, "%[a-zA-Z0-9_-.]", entry);
	}

	if(entry == NULL) {
	/* Skip */
	} else if(rc != 1) {
	crm_warn("Could not parse (%d %d): %s", last, lpc, line+last);
	} else if(safe_str_neq(entry, "on") && safe_str_neq(entry, "off")) {
	crm_trace("Adding '%s'", entry);
	output = g_list_append(output, entry);
	entry = NULL;
	}

	free(entry);
	last = lpc + 1;
	}
	}
	}

	static GListPtr parse_host_list(const char *hosts)
	{
	int lpc = 0;
	int max = 0;
	int last = 0;
	GListPtr output = NULL;

	if(hosts == NULL) {
	return output;
	}

	max = strlen(hosts);
	for(lpc = 0; lpc <= max; lpc++) {
	if(hosts[lpc] == '\n' \|\| hosts[lpc] == 0) {
	char *line = NULL;

	line = calloc(1, 2 + lpc - last);
	snprintf(line, 1 + lpc - last, "%s", hosts+last);
	parse_host_line(line, &output);
	free(line);

	last = lpc + 1;
	}
	}

	return output;
	}

	static stonith_device_t build_device_from_xml(xmlNode msg)
	{
	xmlNode *dev = get_xpath_object("//"F_STONITH_DEVICE, msg, LOG_ERR);
	stonith_device_t *device = NULL;

	device = calloc(1, sizeof(stonith_device_t));
	device->id = crm_element_value_copy(dev, XML_ATTR_ID);
	device->agent = crm_element_value_copy(dev, "agent");
	device->namespace = crm_element_value_copy(dev, "namespace");
	device->params = xml2list(dev);
	device->work = mainloop_add_trigger(G_PRIORITY_HIGH, stonith_device_dispatch, device);
	/* TODO: Hook up priority */

	return device;
	}

	static const char *
	target_list_type(stonith_device_t *dev)
	{
	const char *check_type = NULL;

	check_type = g_hash_table_lookup(dev->params, STONITH_ATTR_HOSTCHECK);

	if(check_type == NULL) {

	if(g_hash_table_lookup(dev->params, STONITH_ATTR_HOSTLIST)) {
	check_type = "static-list";
	} else if(g_hash_table_lookup(dev->params, STONITH_ATTR_HOSTMAP)) {
	check_type = "static-list";
	} else {
	check_type = "dynamic-list";
	}
	}

	return check_type;
	}

	static void
	schedule_internal_command(stonith_device_t *device,
	const char *action,
	const char *victim,
	int timeout,
	void *internal_user_data,
	void (done_cb)(GPid pid, int rc, const char output, gpointer user_data))
	{
	async_command_t *cmd = NULL;

	cmd = calloc(1, sizeof(async_command_t));

	cmd->id = -1;
	cmd->default_timeout = timeout ? timeout : 60;
	cmd->timeout = cmd->default_timeout;
	cmd->action = strdup(action);
	cmd->victim = victim ? strdup(victim) : NULL;
	cmd->device = strdup(device->id);
	cmd->origin = strdup("st_internal_cmd");
	cmd->client = strdup("st_internal_client");
	cmd->client_name = strdup("st_internal_client_name");

	cmd->internal_user_data = internal_user_data;
	cmd->done_cb = done_cb;

	schedule_stonith_command(cmd, device);
	}

	static gboolean string_in_list(GListPtr list, const char *item)
	{
	int lpc = 0;
	int max = g_list_length(list);
	for(lpc = 0; lpc < max; lpc ++) {
	const char *value = g_list_nth_data(list, lpc);
	if(safe_str_eq(item, value)) {
	return TRUE;
	}
	}
	return FALSE;
	}

	static void
	status_search_cb(GPid pid, int rc, const char *output, gpointer user_data)
	{
	async_command_t *cmd = user_data;
	struct device_search_s *search = cmd->internal_user_data;
	stonith_device_t *dev = cmd->device ?
	g_hash_table_lookup(device_list, cmd->device) : NULL;
	gboolean can = FALSE;

	if (!dev) {
	search_devices_record_result(search, NULL, FALSE);
	return;
	}

	dev->active_pid = 0;
	mainloop_set_trigger(dev->work);

	if(rc == 1 /* unkown */) {
	crm_trace("Host %s is not known by %s", search->host, dev->id);

	} else if(rc == 0 /* active / \|\| rc == 2 / inactive */) {
	can = TRUE;

	} else {
	crm_notice("Unkown result when testing if %s can fence %s: rc=%d", dev->id, search->host, rc);
	}
	search_devices_record_result(search, dev->id, can);
	}

	static void
	dynamic_list_search_cb(GPid pid, int rc, const char *output, gpointer user_data)
	{
	async_command_t *cmd = user_data;
	struct device_search_s *search = cmd->internal_user_data;
	stonith_device_t *dev = cmd->device ?
	g_hash_table_lookup(device_list, cmd->device) : NULL;
	gboolean can_fence = FALSE;

	/* Host/alias must be in the list output to be eligable to be fenced
	*
	* Will cause problems if down'd nodes aren't listed or (for virtual nodes)
	* if the guest is still listed despite being moved to another machine
	*/
	if (!dev) {
	search_devices_record_result(search, NULL, FALSE);
	return;
	}

	dev->active_pid = 0;
	mainloop_set_trigger(dev->work);

	/* If we successfully got the targets earlier, don't disable. */
	if (rc != 0 && !dev->targets) {
	crm_notice("Disabling port list queries for %s (%d): %s",
	dev->id, rc, output);
	/* Fall back to status */
	g_hash_table_replace(dev->params, strdup(STONITH_ATTR_HOSTCHECK), strdup("status"));

	g_list_free_full(dev->targets, free);
	dev->targets = NULL;
	} else if (!rc) {
	crm_info("Refreshing port list for %s", dev->id);
	g_list_free_full(dev->targets, free);
	dev->targets = parse_host_list(output);
	dev->targets_age = time(NULL);
	}

	if (dev->targets) {
	const char *alias = g_hash_table_lookup(dev->aliases, search->host);

	if (!alias) {
	alias = search->host;
	}
	if (string_in_list(dev->targets, alias)) {
	can_fence = TRUE;
	}
	}
	search_devices_record_result(search, dev->id, can_fence);
	}

	/*!
	* \internal
	* \brief Checks to see if an identical device already exists in the device_list
	*/
	static stonith_device_t *
	device_has_duplicate(stonith_device_t *device)
	{
	char *key = NULL;
	char *value = NULL;
	GHashTableIter gIter;
	stonith_device_t *dup = g_hash_table_lookup(device_list, device->id);

	if (!dup \|\| safe_str_neq(dup->agent, device->agent)) {
	return NULL;
	}
	g_hash_table_iter_init(&gIter, device->params);
	while (g_hash_table_iter_next(&gIter, (void ) &key, (void ) &value)) {
	char *other_value = g_hash_table_lookup(dup->params, key);
	if (!other_value \|\| safe_str_neq(other_value, value)) {
	return NULL;
	}
	}

	return dup;
	}

	static char *
	get_on_target_actions(const char *agent)
	{
	stonith_t *st = stonith_api_new();
	char *actions = NULL;
	char *buffer = NULL;
	xmlNode *xml = NULL;
	xmlXPathObjectPtr xpath = NULL;
	int rc = 0, max = 0, lpc = 0;

	rc = st->cmds->metadata(st, st_opt_sync_call, agent, NULL, &buffer, 10);
	if (rc \|\| !buffer) {
	goto on_target_actions_cleanup;
	}
	xml = string2xml(buffer);

	xpath = xpath_search(xml, "//action");

	if (!xpath \|\| !xpath->nodesetval) {
	goto on_target_actions_cleanup;
	}

	max = xpath->nodesetval->nodeNr;

	actions = calloc(1, 512);

	for (lpc = 0; lpc < max; lpc++) {
	const char *on_target = NULL;
	const char *action = NULL;
	xmlNode *match = getXpathResult(xpath, lpc);

	CRM_CHECK(match != NULL, continue);

	on_target = crm_element_value(match, "on_target");
	action = crm_element_value(match, "name");

	- if (action && (safe_str_eq(on_target, "true") \|\| safe_str_eq(on_target, "1"))) {
	+ if (action && crm_is_true(on_target)) {
	if (strlen(actions)) {
	g_strlcat(actions, " ", 512);
	}
	g_strlcat(actions, action, 512);
	}
	}

	if (!strlen(actions)) {
	free(actions);
	actions = NULL;
	}

	on_target_actions_cleanup:
	free(buffer);
	stonith_api_delete(st);
	free_xml(xml);

	return actions;
	}

	int stonith_device_register(xmlNode msg, const char *desc, gboolean from_cib)
	{
	const char *value = NULL;
	stonith_device_t *dup = NULL;
	stonith_device_t *device = build_device_from_xml(msg);

	value = g_hash_table_lookup(device->params, STONITH_ATTR_HOSTLIST);
	if(value) {
	device->targets = parse_host_list(value);
	}

	value = g_hash_table_lookup(device->params, STONITH_ATTR_HOSTMAP);
	device->aliases = build_port_aliases(value, &(device->targets));

	if ((dup = device_has_duplicate(device))) {
	crm_notice("Device '%s' already existed in device list (%d active devices)", device->id, g_hash_table_size(device_list));
	free_device(device);
	device = dup;
	} else {
	stonith_device_t *old = g_hash_table_lookup(device_list, device->id);
	if (from_cib && old && old->api_registered) {
	/* If the cib is writing over an entry that is shared with a stonith client,
	* copy any pending ops that currently exist on the old entry to the new one.
	* Otherwise the pending ops will be reported as failures */
	device->pending_ops = old->pending_ops;
	device->api_registered = TRUE;
	old->pending_ops = NULL;
	if (device->pending_ops) {
	mainloop_set_trigger(device->work);
	}
	}
	g_hash_table_replace(device_list, device->id, device);

	crm_notice("Added '%s' to the device list (%d active devices)", device->id, g_hash_table_size(device_list));
	if ((device->on_target_actions = get_on_target_actions(device->agent))) {
	crm_info("The fencing device '%s' requires actions (%s) to be executed on the target node",
	device->id,
	device->on_target_actions);
	}
	}
	if(desc) {
	*desc = device->id;
	}

	if (from_cib) {
	device->cib_registered = TRUE;
	} else {
	device->api_registered = TRUE;
	}

	return pcmk_ok;
	}

	int stonith_device_remove(const char *id, gboolean from_cib)
	{
	stonith_device_t *device = g_hash_table_lookup(device_list, id);

	if (!device) {
	crm_info("Device '%s' not found (%d active devices)",
	id, g_hash_table_size(device_list));
	return pcmk_ok;
	}

	if (from_cib) {
	device->cib_registered = FALSE;
	} else {
	device->verified = FALSE;
	device->api_registered = FALSE;
	}

	if (!device->cib_registered && !device->api_registered) {
	g_hash_table_remove(device_list, id);
	crm_info("Removed '%s' from the device list (%d active devices)",
	id, g_hash_table_size(device_list));
	}
	return pcmk_ok;
	}

	static int count_active_levels(stonith_topology_t *tp)
	{
	int lpc = 0;
	int count = 0;
	for(lpc = 0; lpc < ST_LEVEL_MAX; lpc++) {
	if(tp->levels[lpc] != NULL) {
	count++;
	}
	}
	return count;
	}

	void free_topology_entry(gpointer data)
	{
	stonith_topology_t *tp = data;

	int lpc = 0;
	for(lpc = 0; lpc < ST_LEVEL_MAX; lpc++) {
	if(tp->levels[lpc] != NULL) {
	g_list_free_full(tp->levels[lpc], free);
	}
	}
	free(tp->node);
	free(tp);
	}

	int stonith_level_register(xmlNode msg, char *desc)
	{
	int id = 0;
	int rc = pcmk_ok;
	xmlNode *child = NULL;

	xmlNode *level = get_xpath_object("//"F_STONITH_LEVEL, msg, LOG_ERR);
	const char *node = crm_element_value(level, F_STONITH_TARGET);
	stonith_topology_t *tp = g_hash_table_lookup(topology, node);

	crm_element_value_int(level, XML_ATTR_ID, &id);
	if(desc) {
	*desc = g_strdup_printf("%s[%d]", node, id);
	}
	if(id <= 0 \|\| id >= ST_LEVEL_MAX) {
	return -EINVAL;
	}

	if(tp == NULL) {
	tp = calloc(1, sizeof(stonith_topology_t));
	tp->node = strdup(node);
	g_hash_table_replace(topology, tp->node, tp);
	crm_trace("Added %s to the topology (%d active entries)", node, g_hash_table_size(topology));
	}

	if(tp->levels[id] != NULL) {
	crm_info("Adding to the existing %s[%d] topology entry (%d active entries)", node, id, count_active_levels(tp));
	}

	for (child = __xml_first_child(level); child != NULL; child = __xml_next(child)) {
	const char *device = ID(child);
	crm_trace("Adding device '%s' for %s (%d)", device, node, id);
	tp->levels[id] = g_list_append(tp->levels[id], strdup(device));
	}

	crm_info("Node %s has %d active fencing levels", node, count_active_levels(tp));
	return rc;
	}

	int stonith_level_remove(xmlNode msg, char *desc)
	{
	int id = 0;
	xmlNode *level = get_xpath_object("//"F_STONITH_LEVEL, msg, LOG_ERR);
	const char *node = crm_element_value(level, F_STONITH_TARGET);
	stonith_topology_t *tp = g_hash_table_lookup(topology, node);

	if(desc) {
	*desc = g_strdup_printf("%s[%d]", node, id);
	}
	crm_element_value_int(level, XML_ATTR_ID, &id);

	if(tp == NULL) {
	crm_info("Node %s not found (%d active entries)",
	node, g_hash_table_size(topology));
	return pcmk_ok;

	} else if(id < 0 \|\| id >= ST_LEVEL_MAX) {
	return -EINVAL;
	}

	if(id == 0 && g_hash_table_remove(topology, node)) {
	crm_info("Removed all %s related entries from the topology (%d active entries)",
	node, g_hash_table_size(topology));

	} else if(id > 0 && tp->levels[id] != NULL) {
	g_list_free_full(tp->levels[id], free);
	tp->levels[id] = NULL;

	crm_info("Removed entry '%d' from %s's topology (%d active entries remaining)",
	id, node, count_active_levels(tp));
	}
	return pcmk_ok;
	}

	static int stonith_device_action(xmlNode msg, char *output)
	{
	int rc = pcmk_ok;
	xmlNode *dev = get_xpath_object("//"F_STONITH_DEVICE, msg, LOG_ERR);
	const char *id = crm_element_value(dev, F_STONITH_DEVICE);

	async_command_t *cmd = NULL;
	stonith_device_t *device = NULL;

	if(id) {
	crm_trace("Looking for '%s'", id);
	device = g_hash_table_lookup(device_list, id);
	}

	if(device) {
	cmd = create_async_command(msg);
	if(cmd == NULL) {
	free_device(device);
	return -EPROTO;
	}

	schedule_stonith_command(cmd, device);
	rc = -EINPROGRESS;

	} else {
	crm_info("Device %s not found", id?id:"<none>");
	rc = -ENODEV;
	}
	return rc;
	}

	static void
	search_devices_record_result(struct device_search_s search, const char device, gboolean can_fence)
	{
	search->replies_received++;

	if (can_fence && device) {
	search->capable = g_list_append(search->capable, strdup(device));
	}

	if (search->replies_needed == search->replies_received) {

	crm_debug("Finished Search. %d devices can perform action (%s) on node %s",
	g_list_length(search->capable),
	search->action ? search->action : "<unknown>",
	search->host ? search->host : "<anyone>");

	search->callback(search->capable, search->user_data);
	free(search->host);
	free(search->action);
	free(search);
	}
	}

	static void
	can_fence_host_with_device(stonith_device_t dev, struct device_search_s search)
	{
	gboolean can = FALSE;
	const char *check_type = NULL;
	const char *host = search->host;
	const char *alias = host;

	CRM_LOG_ASSERT(dev != NULL);

	if(dev == NULL) {
	goto search_report_results;
	} else if(host == NULL) {
	can = TRUE;
	goto search_report_results;
	}

	if (dev->on_target_actions &&
	search->action &&
	strstr(dev->on_target_actions, search->action) &&
	safe_str_neq(host, stonith_our_uname)) {
	/* this device can only execute this action on the target node */
	goto search_report_results;
	}

	if(g_hash_table_lookup(dev->aliases, host)) {
	alias = g_hash_table_lookup(dev->aliases, host);
	}

	check_type = target_list_type(dev);

	if(safe_str_eq(check_type, "none")) {
	can = TRUE;

	} else if(safe_str_eq(check_type, "static-list")) {

	/* Presence in the hostmap is sufficient
	* Only use if all hosts on which the device can be active can always fence all listed hosts
	*/

	if(string_in_list(dev->targets, host)) {
	can = TRUE;
	} else if(g_hash_table_lookup(dev->params, STONITH_ATTR_HOSTMAP)
	&& g_hash_table_lookup(dev->aliases, host)) {
	can = TRUE;
	}

	} else if(safe_str_eq(check_type, "dynamic-list")) {
	time_t now = time(NULL);
	if (dev->targets == NULL \|\| dev->targets_age + 60 < now) {
	schedule_internal_command(dev,
	"list",
	NULL,
	search->per_device_timeout,
	search,
	dynamic_list_search_cb);

	/* we'll respond to this search request async in the cb */
	return;
	}

	if (string_in_list(dev->targets, alias)) {
	can = TRUE;
	}

	} else if(safe_str_eq(check_type, "status")) {
	schedule_internal_command(dev,
	"status",
	search->host,
	search->per_device_timeout,
	search,
	status_search_cb);
	/* we'll respond to this search request async in the cb */
	return;
	} else {
	crm_err("Unknown check type: %s", check_type);
	}

	if(safe_str_eq(host, alias)) {
	crm_info("%s can%s fence %s: %s", dev->id, can?"":" not", host, check_type);
	} else {
	crm_info("%s can%s fence %s (aka. '%s'): %s", dev->id, can?"":" not", host, alias, check_type);
	}

	search_report_results:
	search_devices_record_result(search, dev?dev->id:NULL, can);
	}

	static void
	search_devices(gpointer key, gpointer value, gpointer user_data)
	{
	stonith_device_t *dev = value;
	struct device_search_s *search = user_data;

	can_fence_host_with_device(dev, search);
	}

	#define DEFAULT_QUERY_TIMEOUT 20
	static void
	get_capable_devices(const char host, const char action, int timeout, void user_data, void (callback)(GList devices, void user_data))
	{
	struct device_search_s *search;
	int per_device_timeout = DEFAULT_QUERY_TIMEOUT;
	int devices_needing_async_query = 0;
	char *key = NULL;
	const char *check_type = NULL;
	GHashTableIter gIter;
	stonith_device_t *device = NULL;

	if (!g_hash_table_size(device_list)) {
	callback(NULL, user_data);
	return;
	}

	search = calloc(1, sizeof(struct device_search_s));
	if (!search) {
	callback(NULL, user_data);
	return;
	}

	g_hash_table_iter_init(&gIter, device_list);
	while (g_hash_table_iter_next(&gIter, (void ) &key, (void ) &device)) {
	check_type = target_list_type(device);
	if (safe_str_eq(check_type, "status") \|\| safe_str_eq(check_type, "dynamic-list")) {
	devices_needing_async_query++;
	}
	}

	/* If we have devices that require an async event in order to know what
	* nodes they can fence, we have to give the events a timeout. The total
	* query timeout is divided among those events. */
	if (devices_needing_async_query) {
	per_device_timeout = timeout / devices_needing_async_query;
	if (!per_device_timeout) {
	crm_err("stonith-timeout duration %d is too low, raise the duration to %d seconds",
	timeout, DEFAULT_QUERY_TIMEOUT * devices_needing_async_query);
	per_device_timeout = DEFAULT_QUERY_TIMEOUT;
	} else if (per_device_timeout < DEFAULT_QUERY_TIMEOUT) {
	crm_notice("stonith-timeout duration %d is low for the current configuration. Consider raising it to %d seconds",
	timeout, DEFAULT_QUERY_TIMEOUT * devices_needing_async_query);
	}
	}

	search->host = host ? strdup(host) : NULL;
	search->action = action ? strdup(action) : NULL;
	search->per_device_timeout = per_device_timeout;
	/* We are guaranteed this many replies. Even if a device gets
	* unregistered some how during the async search, we will get
	* the correct number of replies. */
	search->replies_needed = g_hash_table_size(device_list);
	search->callback = callback;
	search->user_data = user_data;
	/* kick off the search */

	crm_debug("Searching through %d devices to see what is capable of action (%s) for target %s",
	search->replies_needed,
	search->action ? search->action : "<unknown>",
	search->host ? search->host : "<anyone>");
	g_hash_table_foreach(device_list, search_devices, search);
	}

	struct st_query_data {
	xmlNode *reply;
	char *remote_peer;
	char *client_id;
	char *target;
	char *action;
	int call_options;
	};

	static void
	stonith_query_capable_device_cb(GList devices, void user_data)
	{
	struct st_query_data *query = user_data;
	int available_devices = 0;
	xmlNode *dev = NULL;
	xmlNode *list = NULL;
	GListPtr lpc = NULL;

	/* Pack the results into data */
	list = create_xml_node(NULL, __FUNCTION__);
	crm_xml_add(list, F_STONITH_TARGET, query->target);
	for(lpc = devices; lpc != NULL; lpc = lpc->next) {
	stonith_device_t *device = g_hash_table_lookup(device_list, lpc->data);
	int action_specific_timeout;

	if (!device) {
	/* It is possible the device got unregistered while
	* determining who can fence the target */
	continue;
	}

	available_devices++;

	action_specific_timeout = get_action_timeout(device, query->action, 0);
	dev = create_xml_node(list, F_STONITH_DEVICE);
	crm_xml_add(dev, XML_ATTR_ID, device->id);
	crm_xml_add(dev, "namespace", device->namespace);
	crm_xml_add(dev, "agent", device->agent);
	crm_xml_add_int(dev, F_STONITH_DEVICE_VERIFIED, device->verified);
	if (action_specific_timeout) {
	crm_xml_add_int(dev, F_STONITH_ACTION_TIMEOUT, action_specific_timeout);
	}
	if (query->target == NULL) {
	xmlNode *attrs = create_xml_node(dev, XML_TAG_ATTRS);
	g_hash_table_foreach(device->params, hash2field, attrs);
	}
	}

	crm_xml_add_int(list, "st-available-devices", available_devices);
	if (query->target) {
	crm_debug("Found %d matching devices for '%s'",
	available_devices, query->target);
	} else {
	crm_debug("%d devices installed", available_devices);
	}


	if (list != NULL) {
	crm_trace("Attaching query list output");
	add_message_xml(query->reply, F_STONITH_CALLDATA, list);
	}
	stonith_send_reply(query->reply, query->call_options, query->remote_peer, query->client_id);

	free_xml(query->reply);
	free(query->remote_peer);
	free(query->client_id);
	free(query->target);
	free(query->action);
	free(query);
	free_xml(list);
	g_list_free_full(devices, free);
	}

	static void
	stonith_query(xmlNode msg, const char remote_peer, const char *client_id, int call_options)
	{
	struct st_query_data *query = NULL;
	const char *action = NULL;
	const char *target = NULL;
	int timeout = 0;
	xmlNode *dev = get_xpath_object("//@"F_STONITH_ACTION, msg, LOG_DEBUG_3);

	if(dev) {
	const char *device = crm_element_value(dev, F_STONITH_DEVICE);
	target = crm_element_value(dev, F_STONITH_TARGET);
	action = crm_element_value(dev, F_STONITH_ACTION);
	crm_element_value_int(dev, F_STONITH_TIMEOUT, &timeout);
	if(device && safe_str_eq(device, "manual_ack")) {
	/* No query or reply necessary */
	return;
	}
	}

	crm_log_xml_debug(msg, "Query");
	query = calloc(1, sizeof(struct st_query_data));

	query->reply = stonith_construct_reply(msg, NULL, NULL, pcmk_ok);
	query->remote_peer = remote_peer ? strdup(remote_peer) : NULL;
	query->client_id = client_id ? strdup(client_id) : NULL;
	query->target = target ? strdup(target) : NULL;
	query->action = action ? strdup(action) : NULL;
	query->call_options = call_options;

	get_capable_devices(target, action, timeout, query, stonith_query_capable_device_cb);
	}

	#define ST_LOG_OUTPUT_MAX 512
	static void log_operation(async_command_t cmd, int rc, int pid, const char next, const char *output)
	{
	if(rc == 0) {
	next = NULL;
	}

	if(cmd->victim != NULL) {
	do_crm_log(rc==0?LOG_NOTICE:LOG_ERR,
	"Operation '%s' [%d] (call %d from %s) for host '%s' with device '%s' returned: %d (%s)%s%s",
	cmd->action, pid, cmd->id, cmd->client_name, cmd->victim, cmd->device, rc, pcmk_strerror(rc),
	next?". Trying: ":"", next?next:"");
	} else {
	do_crm_log_unlikely(rc==0?LOG_DEBUG:LOG_NOTICE,
	"Operation '%s' [%d] for device '%s' returned: %d (%s)%s%s",
	cmd->action, pid, cmd->device, rc, pcmk_strerror(rc), next?". Trying: ":"", next?next:"");
	}

	if(output) {
	/* Logging the whole string confuses syslog when the string is xml */
	char *local_copy = strdup(output);
	int lpc = 0, last = 0, more = strlen(local_copy);

	/* Give the log output some reasonable boundary */
	more = more > ST_LOG_OUTPUT_MAX ? ST_LOG_OUTPUT_MAX : more;

	for(lpc = 0; lpc < more; lpc++) {
	if(local_copy[lpc] == '\n' \|\| local_copy[lpc] == 0) {
	local_copy[lpc] = 0;
	do_crm_log(rc==0?LOG_INFO:LOG_WARNING, "%s: %s",
	cmd->device, local_copy+last);
	last = lpc+1;
	}
	}
	crm_debug("%s: %s (total %d bytes)", cmd->device, local_copy+last, more);
	free(local_copy);
	}
	}

	static void
	stonith_send_async_reply(async_command_t cmd, const char output, int rc, GPid pid)
	{
	xmlNode *reply = NULL;
	gboolean bcast = FALSE;

	reply = stonith_construct_async_reply(cmd, output, NULL, rc);

	if(safe_str_eq(cmd->action, "metadata")) {
	/* Too verbose to log */
	crm_trace("Metadata query for %s", cmd->device);
	output = NULL;

	} else if(crm_str_eq(cmd->action, "monitor", TRUE) \|\|
	crm_str_eq(cmd->action, "list", TRUE) \|\|
	crm_str_eq(cmd->action, "status", TRUE)) {
	crm_trace("Never broadcast %s replies", cmd->action);

	} else if(!stand_alone && safe_str_eq(cmd->origin, cmd->victim)) {
	crm_trace("Broadcast %s reply for %s", cmd->action, cmd->victim);
	crm_xml_add(reply, F_SUBTYPE, "broadcast");
	bcast = TRUE;
	}

	log_operation(cmd, rc, pid, NULL, output);
	crm_log_xml_trace(reply, "Reply");

	if(bcast) {
	crm_xml_add(reply, F_STONITH_OPERATION, T_STONITH_NOTIFY);
	send_cluster_message(NULL, crm_msg_stonith_ng, reply, FALSE);

	} else if(cmd->origin) {
	crm_trace("Directed reply to %s", cmd->origin);
	send_cluster_message(crm_get_peer(0, cmd->origin), crm_msg_stonith_ng, reply, FALSE);

	} else {
	crm_trace("Directed local %ssync reply to %s",
	(cmd->options & st_opt_sync_call)?"":"a-", cmd->client_name);
	do_local_reply(reply, cmd->client, cmd->options & st_opt_sync_call, FALSE);
	}

	if(stand_alone) {
	/* Do notification with a clean data object */
	xmlNode *notify_data = create_xml_node(NULL, T_STONITH_NOTIFY_FENCE);
	crm_xml_add_int(notify_data, F_STONITH_RC, rc);
	crm_xml_add(notify_data, F_STONITH_TARGET, cmd->victim);
	crm_xml_add(notify_data, F_STONITH_OPERATION, cmd->op);
	crm_xml_add(notify_data, F_STONITH_DELEGATE, cmd->device);
	crm_xml_add(notify_data, F_STONITH_REMOTE_OP_ID, cmd->remote_op_id);
	crm_xml_add(notify_data, F_STONITH_ORIGIN, cmd->client);

	do_stonith_notify(0, T_STONITH_NOTIFY_FENCE, rc, notify_data);
	}

	free_xml(reply);
	}


	static void cancel_stonith_command(async_command_t *cmd)
	{
	stonith_device_t *device;

	CRM_CHECK(cmd != NULL, return);

	if (!cmd->device) {
	return;
	}

	device = g_hash_table_lookup(device_list, cmd->device);

	if (device) {
	crm_trace("Cancel scheduled %s on %s", cmd->action, device->id);
	device->pending_ops = g_list_remove(device->pending_ops, cmd);
	}
	}

	#define READ_MAX 500
	static void st_child_done(GPid pid, int rc, const char *output, gpointer user_data)
	{
	stonith_device_t *device = NULL;
	async_command_t *cmd = user_data;

	GListPtr gIter = NULL;
	GListPtr gIterNext = NULL;

	CRM_CHECK(cmd != NULL, return);

	active_children--;

	/* The device is ready to do something else now */
	device = g_hash_table_lookup(device_list, cmd->device);
	if(device) {
	device->active_pid = 0;
	if (rc == pcmk_ok &&
	(safe_str_eq(cmd->action, "list") \|\|
	safe_str_eq(cmd->action, "monitor") \|\|
	safe_str_eq(cmd->action, "status"))) {

	device->verified = TRUE;
	}

	mainloop_set_trigger(device->work);
	}

	crm_trace("Operation %s on %s completed with rc=%d (%d remaining)",
	cmd->action, cmd->device, rc, g_list_length(cmd->device_next));

	if(rc != 0 && cmd->device_next) {
	stonith_device_t *dev = g_hash_table_lookup(device_list, cmd->device_next->data);

	if (dev) {
	log_operation(cmd, rc, pid, dev->id, output);

	cmd->device_next = cmd->device_next->next;
	schedule_stonith_command(cmd, dev);
	/* Prevent cmd from being freed */
	cmd = NULL;
	goto done;
	}
	}

	if(rc > 0) {
	rc = -pcmk_err_generic;
	}

	stonith_send_async_reply(cmd, output, rc, pid);

	if(rc != 0) {
	goto done;
	}

	/* Check to see if any operations are scheduled to do the exact
	* same thing that just completed. If so, rather than
	* performing the same fencing operation twice, return the result
	* of this operation for all pending commands it matches. */
	for (gIter = cmd_list; gIter != NULL; gIter = gIterNext) {
	async_command_t *cmd_other = gIter->data;
	gIterNext = gIter->next;

	if(cmd == cmd_other) {
	continue;
	}

	/* A pending scheduled command matches the command that just finished if.
	* 1. The client connections are different.
	* 2. The node victim is the same.
	* 3. The fencing action is the same.
	* 4. The device scheduled to execute the action is the same.
	*/
	if(safe_str_eq(cmd->client, cmd_other->client) \|\|
	safe_str_neq(cmd->victim, cmd_other->victim) \|\|
	safe_str_neq(cmd->action, cmd_other->action) \|\|
	safe_str_neq(cmd->device, cmd_other->device)) {

	continue;
	}

	crm_notice("Merging stonith action %s for node %s originating from client %s with identical stonith request from client %s",
	cmd_other->action,
	cmd_other->victim,
	cmd_other->client_name,
	cmd->client_name);

	cmd_list = g_list_remove_link(cmd_list, gIter);

	stonith_send_async_reply(cmd_other, output, rc, pid);
	cancel_stonith_command(cmd_other);

	free_async_command(cmd_other);
	g_list_free_1(gIter);
	}

	done:
	free_async_command(cmd);
	}

	static gint sort_device_priority(gconstpointer a, gconstpointer b)
	{
	const stonith_device_t *dev_a = a;
	const stonith_device_t *dev_b = a;
	if(dev_a->priority > dev_b->priority) {
	return -1;
	} else if(dev_a->priority < dev_b->priority) {
	return 1;
	}
	return 0;
	}

	static void
	stonith_fence_get_devices_cb(GList devices, void user_data)
	{
	async_command_t *cmd = user_data;
	stonith_device_t *device = NULL;

	crm_info("Found %d matching devices for '%s'", g_list_length(devices), cmd->victim);

	if (g_list_length(devices) > 0) {
	/* Order based on priority */
	devices = g_list_sort(devices, sort_device_priority);
	device = g_hash_table_lookup(device_list, devices->data);

	if (device) {
	cmd->device_list = devices;
	cmd->device_next = devices->next;
	devices = NULL; /* list owned by cmd now */
	}
	}

	/* we have a device, schedule it for fencing. */
	if (device) {
	schedule_stonith_command(cmd, device);
	/* in progress */
	return;
	}

	/* no device found! */
	stonith_send_async_reply(cmd, NULL, -EHOSTUNREACH, 0);

	free_async_command(cmd);
	g_list_free_full(devices, free);
	}

	static int
	stonith_fence(xmlNode *msg)
	{
	const char *device_id = NULL;
	int rc = -EHOSTUNREACH;
	stonith_device_t *device = NULL;
	async_command_t *cmd = create_async_command(msg);
	xmlNode *dev = get_xpath_object("//@"F_STONITH_TARGET, msg, LOG_ERR);

	if(cmd == NULL) {
	return -EPROTO;
	}

	device_id = crm_element_value(dev, F_STONITH_DEVICE);
	if(device_id) {
	device = g_hash_table_lookup(device_list, device_id);
	if(device == NULL) {
	crm_err("Requested device '%s' is not available", device_id);
	} else {
	schedule_stonith_command(cmd, device);
	rc = -EINPROGRESS;
	}
	} else {
	const char *host = crm_element_value(dev, F_STONITH_TARGET);

	if(cmd->options & st_opt_cs_nodeid) {
	int nodeid = crm_atoi(host, NULL);
	crm_node_t *node = crm_get_peer(nodeid, NULL);
	if(node) {
	host = node->uname;
	}
	}
	get_capable_devices(host, cmd->action, cmd->default_timeout, cmd, stonith_fence_get_devices_cb);
	rc = -EINPROGRESS;
	}

	return rc;
	}

	xmlNode stonith_construct_reply(xmlNode request, const char output, xmlNode data, int rc)
	{
	int lpc = 0;
	xmlNode *reply = NULL;

	const char *name = NULL;
	const char *value = NULL;
	const char *names[] = {
	F_STONITH_OPERATION,
	F_STONITH_CALLID,
	F_STONITH_CLIENTID,
	F_STONITH_CLIENTNAME,
	F_STONITH_REMOTE_OP_ID,
	F_STONITH_CALLOPTS
	};

	crm_trace("Creating a basic reply");
	reply = create_xml_node(NULL, T_STONITH_REPLY);

	crm_xml_add(reply, "st_origin", __FUNCTION__);
	crm_xml_add(reply, F_TYPE, T_STONITH_NG);
	crm_xml_add(reply, "st_output", output);
	crm_xml_add_int(reply, F_STONITH_RC, rc);

	CRM_CHECK(request != NULL, crm_warn("Can't create a sane reply"); return reply);
	for(lpc = 0; lpc < DIMOF(names); lpc++) {
	name = names[lpc];
	value = crm_element_value(request, name);
	crm_xml_add(reply, name, value);
	}

	if(data != NULL) {
	crm_trace("Attaching reply output");
	add_message_xml(reply, F_STONITH_CALLDATA, data);
	}
	return reply;
	}

	static xmlNode *
	stonith_construct_async_reply(async_command_t cmd, const char output, xmlNode *data, int rc)
	{
	xmlNode *reply = NULL;

	crm_trace("Creating a basic reply");
	reply = create_xml_node(NULL, T_STONITH_REPLY);

	crm_xml_add(reply, "st_origin", __FUNCTION__);
	crm_xml_add(reply, F_TYPE, T_STONITH_NG);

	crm_xml_add(reply, F_STONITH_OPERATION, cmd->op);
	crm_xml_add(reply, F_STONITH_DEVICE, cmd->device);
	crm_xml_add(reply, F_STONITH_REMOTE_OP_ID, cmd->remote_op_id);
	crm_xml_add(reply, F_STONITH_CLIENTID, cmd->client);
	crm_xml_add(reply, F_STONITH_CLIENTNAME, cmd->client_name);
	crm_xml_add(reply, F_STONITH_TARGET, cmd->victim);
	crm_xml_add(reply, F_STONITH_ACTION, cmd->op);
	crm_xml_add(reply, F_STONITH_ORIGIN, cmd->origin);
	crm_xml_add_int(reply, F_STONITH_CALLID, cmd->id);
	crm_xml_add_int(reply, F_STONITH_CALLOPTS, cmd->options);


	crm_xml_add_int(reply, F_STONITH_RC, rc);

	crm_xml_add(reply, "st_output", output);

	if(data != NULL) {
	crm_info("Attaching reply output");
	add_message_xml(reply, F_STONITH_CALLDATA, data);
	}
	return reply;
	}

	/*!
	* \internal
	* \brief Determine if we need to use an alternate node to
	* fence the target. If so return that node's uname
	*
	* \retval NULL, no alternate host
	* \retval uname, uname of alternate host to use
	*/
	static const char *
	check_alternate_host(const char *target)
	{
	const char *alternate_host = NULL;

	if(g_hash_table_lookup(topology, target) && safe_str_eq(target, stonith_our_uname)) {
	GHashTableIter gIter;
	crm_node_t *entry = NULL;
	int membership = crm_proc_plugin \| crm_proc_heartbeat \| crm_proc_cpg;

	g_hash_table_iter_init(&gIter, crm_peer_cache);
	while (g_hash_table_iter_next(&gIter, NULL, (void **)&entry)) {
	crm_trace("Checking for %s.%d != %s",
	entry->uname, entry->id, target);
	if(entry->uname
	&& (entry->processes & membership)
	&& safe_str_neq(entry->uname, target)) {
	alternate_host = entry->uname;
	break;
	}
	}
	if(alternate_host == NULL) {
	crm_err("No alternate host available to handle complex self fencing request");
	g_hash_table_iter_init(&gIter, crm_peer_cache);
	while (g_hash_table_iter_next(&gIter, NULL, (void **)&entry)) {
	crm_notice("Peer[%d] %s", entry->id, entry->uname);
	}
	}
	}

	return alternate_host;
	}

	static void
	stonith_send_reply(xmlNode reply, int call_options, const char remote_peer, const char *client_id)
	{
	if (remote_peer) {
	send_cluster_message(crm_get_peer(0, remote_peer), crm_msg_stonith_ng, reply, FALSE);
	} else {
	do_local_reply(reply, client_id, call_options & st_opt_sync_call, remote_peer!=NULL);
	}
	}

	static int
	handle_request(stonith_client_t client, uint32_t id, uint32_t flags, xmlNode request, const char *remote_peer)
	{
	int call_options = 0;
	int rc = -EOPNOTSUPP;

	xmlNode *data = NULL;
	xmlNode *reply = NULL;

	char *output = NULL;
	const char *op = crm_element_value(request, F_STONITH_OPERATION);
	const char *client_id = crm_element_value(request, F_STONITH_CLIENTID);

	crm_element_value_int(request, F_STONITH_CALLOPTS, &call_options);

	if(is_set(call_options, st_opt_sync_call)) {
	CRM_ASSERT(client == NULL \|\| client->request_id == id);
	}

	if(crm_str_eq(op, CRM_OP_REGISTER, TRUE)) {
	xmlNode *reply = create_xml_node(NULL, "reply");

	CRM_ASSERT(client);
	crm_xml_add(reply, F_STONITH_OPERATION, CRM_OP_REGISTER);
	crm_xml_add(reply, F_STONITH_CLIENTID, client->id);
	crm_ipcs_send(client->channel, id, reply, FALSE);
	client->request_id = 0;
	free_xml(reply);
	return 0;

	} else if(crm_str_eq(op, STONITH_OP_EXEC, TRUE)) {
	rc = stonith_device_action(request, &output);

	} else if (crm_str_eq(op, STONITH_OP_TIMEOUT_UPDATE, TRUE)) {
	const char *call_id = crm_element_value(request, F_STONITH_CALLID);
	const char *client_id = crm_element_value(request, F_STONITH_CLIENTID);
	int op_timeout = 0;

	crm_element_value_int(request, F_STONITH_TIMEOUT, &op_timeout);
	do_stonith_async_timeout_update(client_id, call_id, op_timeout);
	return 0;

	} else if(crm_str_eq(op, STONITH_OP_QUERY, TRUE)) {
	if (remote_peer) {
	create_remote_stonith_op(client_id, request, TRUE); /* Record it for the future notification */
	}
	stonith_query(request, remote_peer, client_id, call_options);
	return 0;

	} else if(crm_str_eq(op, T_STONITH_NOTIFY, TRUE)) {
	const char *flag_name = NULL;

	CRM_ASSERT(client);
	flag_name = crm_element_value(request, F_STONITH_NOTIFY_ACTIVATE);
	if(flag_name) {
	crm_debug("Setting %s callbacks for %s (%s): ON",
	flag_name, client->name, client->id);
	client->flags \|= get_stonith_flag(flag_name);
	}

	flag_name = crm_element_value(request, F_STONITH_NOTIFY_DEACTIVATE);
	if(flag_name) {
	crm_debug("Setting %s callbacks for %s (%s): off",
	flag_name, client->name, client->id);
	client->flags \|= get_stonith_flag(flag_name);
	}

	if(flags & crm_ipc_client_response) {
	crm_ipcs_send_ack(client->channel, id, "ack", __FUNCTION__, __LINE__);
	client->request_id = 0;
	}
	return 0;

	} else if(crm_str_eq(op, STONITH_OP_RELAY, TRUE)) {
	xmlNode *dev = get_xpath_object("//@"F_STONITH_TARGET, request, LOG_TRACE);
	crm_notice("Peer %s has received a forwarded fencing request from %s to fence (%s) peer %s",
	stonith_our_uname,
	client ? client->name : remote_peer,
	crm_element_value(dev, F_STONITH_ACTION),
	crm_element_value(dev, F_STONITH_TARGET));

	if(initiate_remote_stonith_op(NULL, request, FALSE) != NULL) {
	rc = -EINPROGRESS;
	}

	} else if(crm_str_eq(op, STONITH_OP_FENCE, TRUE)) {

	if(remote_peer \|\| stand_alone) {
	rc = stonith_fence(request);

	} else if(call_options & st_opt_manual_ack) {
	remote_fencing_op_t *rop = initiate_remote_stonith_op(client, request, TRUE);
	rc = stonith_manual_ack(request, rop);

	} else {
	const char *alternate_host = NULL;
	xmlNode *dev = get_xpath_object("//@"F_STONITH_TARGET, request, LOG_TRACE);
	const char *target = crm_element_value(dev, F_STONITH_TARGET);
	const char *action = crm_element_value(dev, F_STONITH_ACTION);
	const char *device = crm_element_value(dev, F_STONITH_DEVICE);

	if(client) {
	int tolerance = 0;

	crm_notice("Client %s.%.8s wants to fence (%s) '%s' with device '%s'",
	client->name, client->id, action, target, device?device:"(any)");

	crm_element_value_int(dev, F_STONITH_TOLERANCE, &tolerance);

	if(stonith_check_fence_tolerance(tolerance, target, action)) {
	rc = 0;
	goto done;
	}

	} else {
	crm_notice("Peer %s wants to fence (%s) '%s' with device '%s'",
	remote_peer, action, target, device?device:"(any)");
	}

	alternate_host = check_alternate_host(target);

	if(alternate_host && client) {
	crm_notice("Forwarding complex self fencing request to peer %s", alternate_host);
	crm_xml_add(request, F_STONITH_OPERATION, STONITH_OP_RELAY);
	crm_xml_add(request, F_STONITH_CLIENTID, client->id);
	send_cluster_message(crm_get_peer(0, alternate_host), crm_msg_stonith_ng, request, FALSE);
	rc = -EINPROGRESS;

	} else if(initiate_remote_stonith_op(client, request, FALSE) != NULL) {
	rc = -EINPROGRESS;
	}
	}

	} else if (crm_str_eq(op, STONITH_OP_FENCE_HISTORY, TRUE)) {
	rc = stonith_fence_history(request, &data);

	} else if(crm_str_eq(op, STONITH_OP_DEVICE_ADD, TRUE)) {
	const char *id = NULL;
	xmlNode *notify_data = create_xml_node(NULL, op);
	rc = stonith_device_register(request, &id, FALSE);

	crm_xml_add(notify_data, F_STONITH_DEVICE, id);
	crm_xml_add_int(notify_data, F_STONITH_ACTIVE, g_hash_table_size(device_list));

	do_stonith_notify(call_options, op, rc, notify_data);
	free_xml(notify_data);

	} else if(crm_str_eq(op, STONITH_OP_DEVICE_DEL, TRUE)) {
	xmlNode *dev = get_xpath_object("//"F_STONITH_DEVICE, request, LOG_ERR);
	const char *id = crm_element_value(dev, XML_ATTR_ID);
	xmlNode *notify_data = create_xml_node(NULL, op);

	rc = stonith_device_remove(id, FALSE);

	crm_xml_add(notify_data, F_STONITH_DEVICE, id);
	crm_xml_add_int(notify_data, F_STONITH_ACTIVE, g_hash_table_size(device_list));

	do_stonith_notify(call_options, op, rc, notify_data);
	free_xml(notify_data);

	} else if(crm_str_eq(op, STONITH_OP_LEVEL_ADD, TRUE)) {
	char *id = NULL;
	xmlNode *notify_data = create_xml_node(NULL, op);
	rc = stonith_level_register(request, &id);

	crm_xml_add(notify_data, F_STONITH_DEVICE, id);
	crm_xml_add_int(notify_data, F_STONITH_ACTIVE, g_hash_table_size(topology));

	do_stonith_notify(call_options, op, rc, notify_data);
	free_xml(notify_data);

	} else if(crm_str_eq(op, STONITH_OP_LEVEL_DEL, TRUE)) {
	char *id = NULL;
	xmlNode *notify_data = create_xml_node(NULL, op);
	rc = stonith_level_remove(request, &id);

	crm_xml_add(notify_data, F_STONITH_DEVICE, id);
	crm_xml_add_int(notify_data, F_STONITH_ACTIVE, g_hash_table_size(topology));

	do_stonith_notify(call_options, op, rc, notify_data);
	free_xml(notify_data);

	} else if(crm_str_eq(op, STONITH_OP_CONFIRM, TRUE)) {
	async_command_t *cmd = create_async_command(request);
	xmlNode *reply = stonith_construct_async_reply(cmd, NULL, NULL, 0);

	crm_xml_add(reply, F_STONITH_OPERATION, T_STONITH_NOTIFY);
	crm_notice("Broadcasting manual fencing confirmation for node %s", cmd->victim);
	send_cluster_message(NULL, crm_msg_stonith_ng, reply, FALSE);

	free_async_command(cmd);
	free_xml(reply);

	} else {
	crm_err("Unknown %s from %s", op, client ? client->name : remote_peer);
	crm_log_xml_warn(request, "UnknownOp");
	}

	done:

	/* Always reply unles the request is in process still.
	* If in progress, a reply will happen async after the request
	* processing is finished */
	if (rc != -EINPROGRESS) {
	reply = stonith_construct_reply(request, output, data, rc);
	stonith_send_reply(reply, call_options, remote_peer, client_id);
	}

	free(output);
	free_xml(data);
	free_xml(reply);

	return rc;
	}

	static void
	handle_reply(stonith_client_t client, xmlNode request, const char *remote_peer)
	{
	const char *op = crm_element_value(request, F_STONITH_OPERATION);

	if(crm_str_eq(op, STONITH_OP_QUERY, TRUE)) {
	process_remote_stonith_query(request);
	} else if(crm_str_eq(op, T_STONITH_NOTIFY, TRUE)) {
	process_remote_stonith_exec(request);
	} else if(crm_str_eq(op, STONITH_OP_FENCE, TRUE)) {
	/* Reply to a complex fencing op */
	process_remote_stonith_exec(request);
	} else {
	crm_err("Unknown %s reply from %s", op, client ? client->name : remote_peer);
	crm_log_xml_warn(request, "UnknownOp");
	}
	}

	void
	stonith_command(stonith_client_t client, uint32_t id, uint32_t flags, xmlNode request, const char *remote_peer)
	{
	int call_options = 0;
	int rc = 0;
	gboolean is_reply = FALSE;
	const char *op = crm_element_value(request, F_STONITH_OPERATION);

	if(get_xpath_object("//"T_STONITH_REPLY, request, LOG_DEBUG_3)) {
	is_reply = TRUE;
	}

	crm_element_value_int(request, F_STONITH_CALLOPTS, &call_options);
	crm_debug("Processing %s%s from %s (%16x)", op, is_reply?" reply":"",
	client?client->name:remote_peer, call_options);

	if(is_set(call_options, st_opt_sync_call)) {
	CRM_ASSERT(client == NULL \|\| client->request_id == id);
	}

	if (is_reply) {
	handle_reply(client, request, remote_peer);
	} else {
	rc = handle_request(client, id, flags, request, remote_peer);
	}

	do_crm_log_unlikely(rc>0?LOG_DEBUG:LOG_INFO,"Processed %s%s from %s: %s (%d)", op, is_reply?" reply":"",
	client?client->name:remote_peer, rc>0?"":pcmk_strerror(rc), rc);

	}

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