clone.c
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clone.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 2.1 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	#include <crm_internal.h>

	#include <crm/msg_xml.h>
	#include <allocate.h>
	#include <utils.h>
	#include <lib/crm/pengine/utils.h>

	#define VARIANT_CLONE 1
	#include <lib/crm/pengine/variant.h>

	gint sort_clone_instance(gconstpointer a, gconstpointer b);
	resource_t *find_compatible_child(
	resource_t local_child, resource_t rsc, enum rsc_role_e filter);

	void clone_create_notifications(
	resource_t rsc, action_t action, action_t *action_complete,
	pe_working_set_t *data_set);

	void child_stopping_constraints(
	clone_variant_data_t *clone_data,
	resource_t self, resource_t child, resource_t *last,
	pe_working_set_t *data_set);

	void child_starting_constraints(
	clone_variant_data_t *clone_data,
	resource_t self, resource_t child, resource_t *last,
	pe_working_set_t *data_set);


	static node_t *
	parent_node_instance(const resource_t rsc, node_t node)
	{
	node_t *ret = NULL;
	if(node != NULL) {
	ret = pe_find_node_id(
	rsc->parent->allowed_nodes, node->details->id);
	}
	return ret;
	}

	static gboolean did_fail(const resource_t *rsc)
	{
	if(is_set(rsc->flags, pe_rsc_failed)) {
	return TRUE;
	}

	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,
	if(did_fail(child_rsc)) {
	return TRUE;
	}
	);
	return FALSE;
	}


	gint sort_clone_instance(gconstpointer a, gconstpointer b)
	{
	int level = LOG_DEBUG_3;
	node_t *node1 = NULL;
	node_t *node2 = NULL;

	gboolean can1 = TRUE;
	gboolean can2 = TRUE;

	const resource_t resource1 = (const resource_t)a;
	const resource_t resource2 = (const resource_t)b;

	CRM_ASSERT(resource1 != NULL);
	CRM_ASSERT(resource2 != NULL);

	/* allocation order:
	* - active instances
	* - instances running on nodes with the least copies
	* - active instances on nodes that cant support them or are to be fenced
	* - failed instances
	* - inactive instances
	*/

	do_crm_log(level+1, "%s ? %s", resource1->id, resource2->id);
	if(resource1->running_on && resource2->running_on) {
	if(g_list_length(resource1->running_on) < g_list_length(resource2->running_on)) {
	do_crm_log(level, "%s < %s: running_on", resource1->id, resource2->id);
	return -1;

	} else if(g_list_length(resource1->running_on) > g_list_length(resource2->running_on)) {
	do_crm_log(level, "%s > %s: running_on", resource1->id, resource2->id);
	return 1;
	}
	}

	if(resource1->running_on) {
	node1 = resource1->running_on->data;
	}
	if(resource2->running_on) {
	node2 = resource2->running_on->data;
	}

	if(node1) {
	node_t *match = pe_find_node_id(resource1->allowed_nodes, node1->details->id);
	if(match->weight < 0) {
	do_crm_log(level, "%s: current location is unavailable", resource1->id);
	node1 = NULL;
	can1 = FALSE;
	}
	}

	if(node2) {
	node_t *match = pe_find_node_id(resource2->allowed_nodes, node2->details->id);
	if(match->weight < 0) {
	do_crm_log(level, "%s: current location is unavailable", resource2->id);
	node2 = NULL;
	can2 = FALSE;
	}
	}

	if(can1 != can2) {
	if(can1) {
	do_crm_log(level, "%s < %s: availability of current location", resource1->id, resource2->id);
	return -1;
	}
	do_crm_log(level, "%s > %s: availability of current location", resource1->id, resource2->id);
	return 1;
	}

	if(resource1->priority < resource2->priority) {
	do_crm_log(level, "%s < %s: priority", resource1->id, resource2->id);
	return 1;

	} else if(resource1->priority > resource2->priority) {
	do_crm_log(level, "%s > %s: priority", resource1->id, resource2->id);
	return -1;
	}

	if(node1 == NULL && node2 == NULL) {
	do_crm_log(level, "%s == %s: not active",
	resource1->id, resource2->id);
	return 0;
	}

	if(node1 != node2) {
	if(node1 == NULL) {
	do_crm_log(level, "%s > %s: active", resource1->id, resource2->id);
	return 1;
	} else if(node2 == NULL) {
	do_crm_log(level, "%s < %s: active", resource1->id, resource2->id);
	return -1;
	}
	}

	can1 = can_run_resources(node1);
	can2 = can_run_resources(node2);
	if(can1 != can2) {
	if(can1) {
	do_crm_log(level, "%s < %s: can", resource1->id, resource2->id);
	return -1;
	}
	do_crm_log(level, "%s > %s: can", resource1->id, resource2->id);
	return 1;
	}

	node1 = parent_node_instance(resource1, node1);
	node2 = parent_node_instance(resource2, node2);
	if(node1 != NULL && node2 == NULL) {
	do_crm_log(level, "%s < %s: not allowed", resource1->id, resource2->id);
	return -1;
	} else if(node1 == NULL && node2 != NULL) {
	do_crm_log(level, "%s > %s: not allowed", resource1->id, resource2->id);
	return 1;
	}

	if(node1 == NULL) {
	do_crm_log(level, "%s == %s: not allowed", resource1->id, resource2->id);
	return 0;
	}

	if(node1->count < node2->count) {
	do_crm_log(level, "%s < %s: count", resource1->id, resource2->id);
	return -1;

	} else if(node1->count > node2->count) {
	do_crm_log(level, "%s > %s: count", resource1->id, resource2->id);
	return 1;
	}

	if(node1->weight < node2->weight) {
	do_crm_log(level, "%s < %s: node score", resource1->id, resource2->id);
	return 1;

	} else if(node1->weight > node2->weight) {
	do_crm_log(level, "%s > %s: node score", resource1->id, resource2->id);
	return -1;
	}

	can1 = did_fail(resource1);
	can2 = did_fail(resource2);
	if(can1 != can2) {
	if(can1) {
	do_crm_log(level, "%s > %s: failed", resource1->id, resource2->id);
	return 1;
	}
	do_crm_log(level, "%s < %s: failed", resource1->id, resource2->id);
	return -1;
	}

	do_crm_log(level, "%s == %s: default %d", resource1->id, resource2->id, node2->weight);
	return 0;
	}

	static node_t *
	can_run_instance(resource_t rsc, node_t node)
	{
	node_t *local_node = NULL;
	clone_variant_data_t *clone_data = NULL;
	if(can_run_resources(node) == FALSE) {
	goto bail;
	}

	local_node = parent_node_instance(rsc, node);
	get_clone_variant_data(clone_data, rsc->parent);

	if(local_node == NULL) {
	crm_warn("%s cannot run on %s: node not allowed",
	rsc->id, node->details->uname);
	goto bail;

	} else if(local_node->count < clone_data->clone_node_max) {
	return local_node;

	} else {
	crm_debug_2("%s cannot run on %s: node full",
	rsc->id, node->details->uname);
	}

	bail:
	if(node) {
	common_update_score(rsc, node->details->id, -INFINITY);
	}
	return NULL;
	}


	static node_t *
	color_instance(resource_t rsc, pe_working_set_t data_set)
	{
	node_t *chosen = NULL;
	node_t *local_node = NULL;

	crm_debug_2("Processing %s", rsc->id);

	if(is_not_set(rsc->flags, pe_rsc_provisional)) {
	return rsc->fns->location(rsc, NULL, FALSE);

	} else if(is_set(rsc->flags, pe_rsc_allocating)) {
	crm_debug("Dependancy loop detected involving %s", rsc->id);
	return NULL;
	}

	if(rsc->allowed_nodes) {
	slist_iter(try_node, node_t, rsc->allowed_nodes, lpc,
	can_run_instance(rsc, try_node);
	);
	}

	chosen = rsc->cmds->color(rsc, data_set);
	if(chosen) {
	local_node = pe_find_node_id(
	rsc->parent->allowed_nodes, chosen->details->id);

	if(local_node) {
	local_node->count++;
	} else if(is_set(rsc->flags, pe_rsc_managed)) {
	/* what to do? we can't enforce per-node limits in this case */
	crm_config_err("%s not found in %s (list=%d)",
	chosen->details->id, rsc->parent->id,
	g_list_length(rsc->parent->allowed_nodes));
	}
	}

	return chosen;
	}

	static void append_parent_colocation(resource_t rsc, resource_t child)
	{
	slist_iter(cons, rsc_colocation_t, rsc->rsc_cons, lpc,
	child->rsc_cons = g_list_append(child->rsc_cons, cons));
	slist_iter(cons, rsc_colocation_t, rsc->rsc_cons_lhs, lpc,
	child->rsc_cons_lhs = g_list_append(child->rsc_cons_lhs, cons));
	}

	node_t *
	clone_color(resource_t rsc, pe_working_set_t data_set)
	{
	int allocated = 0;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	if(is_not_set(rsc->flags, pe_rsc_provisional)) {
	return NULL;

	} else if(is_set(rsc->flags, pe_rsc_allocating)) {
	crm_debug("Dependancy loop detected involving %s", rsc->id);
	return NULL;
	}

	set_bit(rsc->flags, pe_rsc_allocating);
	crm_debug_2("Processing %s", rsc->id);

	/* this information is used by sort_clone_instance() when deciding in which
	* order to allocate clone instances
	*/
	slist_iter(
	constraint, rsc_colocation_t, rsc->rsc_cons_lhs, lpc,

	rsc->allowed_nodes = constraint->rsc_lh->cmds->merge_weights(
	constraint->rsc_lh, rsc->id, rsc->allowed_nodes,
	constraint->score/INFINITY, TRUE);
	);

	dump_node_scores(LOG_DEBUG_2, rsc, __FUNCTION__, rsc->allowed_nodes);

	/* count now tracks the number of clones currently allocated */
	slist_iter(node, node_t, rsc->allowed_nodes, lpc,
	node->count = 0;
	);

	slist_iter(child, resource_t, rsc->children, lpc,
	if(g_list_length(child->running_on) > 0) {
	node_t *child_node = child->running_on->data;
	node_t *local_node = parent_node_instance(
	child, child->running_on->data);
	if(local_node) {
	local_node->count++;
	} else {
	crm_err("%s is running on %s which isn't allowed",
	child->id, child_node->details->uname);
	}
	}
	);

	rsc->children = g_list_sort(rsc->children, sort_clone_instance);

	/* count now tracks the number of clones we have allocated */
	slist_iter(node, node_t, rsc->allowed_nodes, lpc,
	node->count = 0;
	);

	rsc->allowed_nodes = g_list_sort(
	rsc->allowed_nodes, sort_node_weight);


	slist_iter(child, resource_t, rsc->children, lpc,
	if(allocated >= clone_data->clone_max) {
	crm_debug("Child %s not allocated - limit reached", child->id);
	resource_location(child, NULL, -INFINITY, "clone_color:limit_reached", data_set);
	} else {
	append_parent_colocation(rsc, child);
	}

	if(color_instance(child, data_set)) {
	allocated++;
	}
	);

	crm_debug("Allocated %d %s instances of a possible %d",
	allocated, rsc->id, clone_data->clone_max);

	clear_bit(rsc->flags, pe_rsc_provisional);
	clear_bit(rsc->flags, pe_rsc_allocating);

	return NULL;
	}

	static void
	clone_update_pseudo_status(
	resource_t child, gboolean stopping, gboolean *starting)
	{
	CRM_ASSERT(stopping != NULL);
	CRM_ASSERT(starting != NULL);

	slist_iter(
	action, action_t, child->actions, lpc,

	if(starting && stopping) {
	return;

	} else if(action->optional) {
	crm_debug_3("Skipping optional: %s", action->uuid);
	continue;

	} else if(action->pseudo == FALSE && action->runnable == FALSE){
	crm_debug_3("Skipping unrunnable: %s", action->uuid);
	continue;

	} else if(safe_str_eq(CRMD_ACTION_STOP, action->task)) {
	crm_debug_2("Stopping due to: %s", action->uuid);
	*stopping = TRUE;

	} else if(safe_str_eq(CRMD_ACTION_START, action->task)) {
	if(action->runnable == FALSE) {
	crm_debug_3("Skipping pseudo-op: %s run=%d, pseudo=%d",
	action->uuid, action->runnable, action->pseudo);
	} else {
	crm_debug_2("Starting due to: %s", action->uuid);
	crm_debug_3("%s run=%d, pseudo=%d",
	action->uuid, action->runnable, action->pseudo);
	*starting = TRUE;
	}
	}
	);

	}

	void clone_create_actions(resource_t rsc, pe_working_set_t data_set)
	{
	gboolean child_starting = FALSE;
	gboolean child_stopping = FALSE;
	action_t *stop = NULL;
	action_t *start = NULL;
	action_t *action_complete = NULL;
	resource_t *last_start_rsc = NULL;
	resource_t *last_stop_rsc = NULL;
	clone_variant_data_t *clone_data = NULL;

	get_clone_variant_data(clone_data, rsc);

	crm_debug_2("Creating actions for %s", rsc->id);

	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,
	child_rsc->cmds->create_actions(child_rsc, data_set);
	clone_update_pseudo_status(
	child_rsc, &child_stopping, &child_starting);

	if(is_set(child_rsc->flags, pe_rsc_starting)) {
	last_start_rsc = child_rsc;
	}
	if(is_set(child_rsc->flags, pe_rsc_stopping)) {
	last_stop_rsc = child_rsc;
	}
	);

	/* start */
	start = start_action(rsc, NULL, !child_starting);
	action_complete = custom_action(
	rsc, started_key(rsc),
	CRMD_ACTION_STARTED, NULL, !child_starting, TRUE, data_set);

	start->pseudo = TRUE;
	start->runnable = TRUE;
	action_complete->pseudo = TRUE;
	action_complete->runnable = TRUE;
	action_complete->priority = INFINITY;
	/* crm_err("Upgrading priority for %s to INFINITY", action_complete->uuid); */

	child_starting_constraints(clone_data, rsc, NULL, last_start_rsc, data_set);

	clone_create_notifications(
	rsc, start, action_complete, data_set);


	/* stop */
	stop = stop_action(rsc, NULL, !child_stopping);
	action_complete = custom_action(
	rsc, stopped_key(rsc),
	CRMD_ACTION_STOPPED, NULL, !child_stopping, TRUE, data_set);

	stop->pseudo = TRUE;
	stop->runnable = TRUE;
	action_complete->pseudo = TRUE;
	action_complete->runnable = TRUE;
	action_complete->priority = INFINITY;
	/* crm_err("Upgrading priority for %s to INFINITY", action_complete->uuid); */

	child_stopping_constraints(clone_data, rsc, NULL, last_stop_rsc, data_set);


	clone_create_notifications(rsc, stop, action_complete, data_set);
	rsc->actions = rsc->actions;

	if(stop->post_notified != NULL && start->pre_notify != NULL) {
	order_actions(stop->post_notified, start->pre_notify, pe_order_optional);
	}
	}

	void
	clone_create_notifications(
	resource_t rsc, action_t action, action_t *action_complete,
	pe_working_set_t *data_set)
	{
	/*
	* pre_notify -> pre_notify_complete -> pseudo_action
	* -> (real actions) -> pseudo_action_complete
	* -> post_notify -> post_notify_complete
	*
	* if the pre_noitfy requires confirmation,
	* then a list of confirmations will be added as triggers
	* to pseudo_action in clone_expand()
	*/
	action_t *notify = NULL;
	action_t *notify_complete = NULL;
	enum action_tasks task;
	char *notify_key = NULL;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	if(is_not_set(rsc->flags, pe_rsc_notify)) {
	return;
	}

	task = text2task(action->task);

	/* create pre_notify */
	notify_key = generate_notify_key(
	rsc->id, "pre", action->task);
	notify = custom_action(rsc, notify_key,
	CRMD_ACTION_NOTIFY, NULL,
	action->optional, TRUE, data_set);

	add_hash_param(notify->meta, "notify_type", "pre");
	add_hash_param(notify->meta, "notify_operation", action->task);
	if(clone_data->notify_confirm) {
	add_hash_param(notify->meta, "notify_confirm", "yes");
	} else {
	add_hash_param(notify->meta, "notify_confirm", "no");
	}

	/* create pre_notify_complete */
	notify_key = generate_notify_key(
	rsc->id, "confirmed-pre", action->task);
	notify_complete = custom_action(rsc, notify_key,
	CRMD_ACTION_NOTIFIED, NULL,
	action->optional, TRUE, data_set);
	add_hash_param(notify_complete->meta, "notify_type", "pre");
	add_hash_param(notify_complete->meta, "notify_operation", action->task);
	if(clone_data->notify_confirm) {
	add_hash_param(notify->meta, "notify_confirm", "yes");
	} else {
	add_hash_param(notify->meta, "notify_confirm", "no");
	}
	notify->pseudo = TRUE;
	notify->runnable = TRUE;
	notify_complete->pseudo = TRUE;
	notify_complete->runnable = TRUE;

	/* pre_notify before pre_notify_complete */
	custom_action_order(
	rsc, NULL, notify,
	rsc, NULL, notify_complete,
	pe_order_implies_left, data_set);

	/* pre_notify_complete before action */
	custom_action_order(
	rsc, NULL, notify_complete,
	rsc, NULL, action,
	pe_order_implies_left, data_set);

	action->pre_notify = notify;
	action->pre_notified = notify_complete;

	/* create post_notify */
	notify_key = generate_notify_key
	(rsc->id, "post", action->task);
	notify = custom_action(rsc, notify_key,
	CRMD_ACTION_NOTIFY, NULL,
	action_complete->optional, TRUE, data_set);
	add_hash_param(notify->meta, "notify_type", "post");
	add_hash_param(notify->meta, "notify_operation", action->task);
	if(clone_data->notify_confirm) {
	add_hash_param(notify->meta, "notify_confirm", "yes");
	} else {
	add_hash_param(notify->meta, "notify_confirm", "no");
	}

	/* action_complete before post_notify */
	custom_action_order(
	rsc, NULL, action_complete,
	rsc, NULL, notify,
	pe_order_implies_right, data_set);

	/* create post_notify_complete */
	notify_key = generate_notify_key(
	rsc->id, "confirmed-post", action->task);
	notify_complete = custom_action(rsc, notify_key,
	CRMD_ACTION_NOTIFIED, NULL,
	action->optional, TRUE, data_set);
	add_hash_param(notify_complete->meta, "notify_type", "pre");
	add_hash_param(notify_complete->meta, "notify_operation", action->task);
	if(clone_data->notify_confirm) {
	add_hash_param(notify->meta, "notify_confirm", "yes");
	} else {
	add_hash_param(notify->meta, "notify_confirm", "no");
	}

	notify->pseudo = TRUE;
	notify->runnable = TRUE;
	notify->priority = INFINITY;
	notify->runnable = action_complete->runnable;

	notify_complete->pseudo = TRUE;
	notify_complete->runnable = TRUE;
	notify_complete->priority = INFINITY;
	notify_complete->runnable = action_complete->runnable;

	/* post_notify before post_notify_complete */
	custom_action_order(
	rsc, NULL, notify,
	rsc, NULL, notify_complete,
	pe_order_implies_left, data_set);

	action->post_notify = notify;
	action->post_notified = notify_complete;


	if(safe_str_eq(action->task, CRMD_ACTION_STOP)) {
	/* post_notify_complete before start */
	custom_action_order(
	rsc, NULL, notify_complete,
	rsc, start_key(rsc), NULL,
	pe_order_optional, data_set);

	} else if(safe_str_eq(action->task, CRMD_ACTION_START)) {
	/* post_notify_complete before promote */
	custom_action_order(
	rsc, NULL, notify_complete,
	rsc, promote_key(rsc), NULL,
	pe_order_optional, data_set);

	} else if(safe_str_eq(action->task, CRMD_ACTION_DEMOTE)) {
	/* post_notify_complete before promote */
	custom_action_order(
	rsc, NULL, notify_complete,
	rsc, stop_key(rsc), NULL,
	pe_order_optional, data_set);
	}
	}

	void
	child_starting_constraints(
	clone_variant_data_t *clone_data,
	resource_t rsc, resource_t child, resource_t *last,
	pe_working_set_t *data_set)
	{
	if(child == NULL && last == NULL) {
	crm_debug("%s has no active children", rsc->id);
	return;
	}

	if(child != NULL) {
	order_start_start(rsc, child, pe_order_runnable_left);

	custom_action_order(
	child, start_key(child), NULL,
	rsc, started_key(rsc), NULL,
	pe_order_optional, data_set);
	}

	if(clone_data->ordered) {
	if(child == NULL) {
	/* last child start before global started */
	custom_action_order(
	last, start_key(last), NULL,
	rsc, started_key(rsc), NULL,
	pe_order_runnable_left, data_set);

	} else if(last == NULL) {
	/* global start before first child start */
	order_start_start(
	rsc, child, pe_order_implies_left);

	} else {
	/* child/child relative start */
	order_start_start(last, child, pe_order_implies_left);
	}
	}
	}

	void
	child_stopping_constraints(
	clone_variant_data_t *clone_data,
	resource_t rsc, resource_t child, resource_t *last,
	pe_working_set_t *data_set)
	{
	if(child == NULL && last == NULL) {
	crm_debug("%s has no active children", rsc->id);
	return;
	}

	if(child != NULL) {
	order_stop_stop(rsc, child, pe_order_shutdown);

	custom_action_order(
	child, stop_key(child), NULL,
	rsc, stopped_key(rsc), NULL,
	pe_order_optional, data_set);
	}

	if(clone_data->ordered) {
	if(last == NULL) {
	/* first child stop before global stopped */
	custom_action_order(
	child, stop_key(child), NULL,
	rsc, stopped_key(rsc), NULL,
	pe_order_runnable_left, data_set);

	} else if(child == NULL) {
	/* global stop before last child stop */
	order_stop_stop(
	rsc, last, pe_order_implies_left);
	} else {
	/* child/child relative stop */
	order_stop_stop(child, last, pe_order_implies_left);
	}
	}
	}


	void
	clone_internal_constraints(resource_t rsc, pe_working_set_t data_set)
	{
	resource_t *last_rsc = NULL;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	native_internal_constraints(rsc, data_set);

	/* global stop before stopped */
	custom_action_order(
	rsc, stop_key(rsc), NULL,
	rsc, stopped_key(rsc), NULL,
	pe_order_runnable_left, data_set);

	/* global start before started */
	custom_action_order(
	rsc, start_key(rsc), NULL,
	rsc, started_key(rsc), NULL,
	pe_order_runnable_left, data_set);

	/* global stopped before start */
	custom_action_order(
	rsc, stopped_key(rsc), NULL,
	rsc, start_key(rsc), NULL,
	pe_order_optional, data_set);

	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	child_rsc->cmds->internal_constraints(child_rsc, data_set);

	child_starting_constraints(
	clone_data, rsc, child_rsc, last_rsc, data_set);

	child_stopping_constraints(
	clone_data, rsc, child_rsc, last_rsc, data_set);

	last_rsc = child_rsc;
	);
	}

	resource_t*
	find_compatible_child(
	resource_t local_child, resource_t rsc, enum rsc_role_e filter)
	{
	node_t *local_node = NULL;
	node_t *node = NULL;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	local_node = local_child->fns->location(local_child, NULL, FALSE);
	if(local_node == NULL) {
	crm_debug("Can't colocate unrunnable child %s with %s",
	local_child->id, rsc->id);
	return NULL;
	}

	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	enum rsc_role_e next_role = child_rsc->fns->state(child_rsc, FALSE);
	node = child_rsc->fns->location(child_rsc, NULL, FALSE);

	if(filter != RSC_ROLE_UNKNOWN && next_role != filter) {
	crm_debug_2("Filtered %s", child_rsc->id);
	continue;
	}

	if(node->details == local_node->details) {
	crm_info("Colocating %s with %s on %s",
	local_child->id, child_rsc->id, node->details->uname);
	return child_rsc;
	}
	);
	crm_debug("Can't colocate child %s with %s",
	local_child->id, rsc->id);
	return NULL;
	}

	void clone_rsc_colocation_lh(
	resource_t rsc_lh, resource_t rsc_rh, rsc_colocation_t *constraint)
	{
	gboolean do_interleave = FALSE;
	resource_t *rsc = constraint->rsc_lh;
	clone_variant_data_t *clone_data = NULL;
	clone_variant_data_t *clone_data_rh = NULL;

	if(rsc == NULL) {
	pe_err("rsc_lh was NULL for %s", constraint->id);
	return;

	} else if(constraint->rsc_rh == NULL) {
	pe_err("rsc_rh was NULL for %s", constraint->id);
	return;

	} else {
	crm_debug_4("Processing constraints from %s", rsc->id);
	}

	get_clone_variant_data(clone_data, rsc);

	if(constraint->rsc_rh->variant == pe_clone
	\|\| constraint->rsc_rh->variant == pe_master) {
	get_clone_variant_data(
	clone_data_rh, constraint->rsc_rh);
	if(clone_data->clone_node_max
	!= clone_data_rh->clone_node_max) {
	crm_config_err("Cannot interleave "XML_CIB_TAG_INCARNATION
	" %s and %s because"
	" they do not support the same number of"
	" resources per node",
	constraint->rsc_lh->id, constraint->rsc_rh->id);

	/* only the LHS side needs to be labeled as interleave */
	} else if(clone_data->interleave) {
	do_interleave = TRUE;

	} else if(constraint->score >= INFINITY) {
	GListPtr lhs = NULL, rhs = NULL;
	lhs = rsc_lh->allowed_nodes;

	slist_iter(
	child_rsc, resource_t, rsc_rh->children, lpc,
	node_t *chosen = child_rsc->fns->location(child_rsc, NULL, FALSE);
	if(chosen != NULL) {
	rhs = g_list_append(rhs, chosen);
	}
	);

	rsc_lh->allowed_nodes = node_list_and(lhs, rhs, FALSE);

	pe_free_shallow_adv(rhs, FALSE);
	pe_free_shallow(lhs);
	return;
	}

	} else if(constraint->score >= INFINITY) {
	crm_config_err("Manditory co-location of clones (%s) with other"
	" non-clone (%s) resources is not supported",
	rsc_lh->id, rsc_rh->id);
	return;
	}

	if(do_interleave) {
	resource_t *rh_child = NULL;

	slist_iter(lh_child, resource_t, rsc->children, lpc,

	CRM_ASSERT(lh_child != NULL);
	rh_child = find_compatible_child(
	lh_child, rsc_rh, RSC_ROLE_UNKNOWN);
	if(rh_child == NULL) {
	continue;
	}
	lh_child->cmds->rsc_colocation_lh(
	lh_child, rh_child, constraint);
	);
	return;
	}

	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	child_rsc->cmds->rsc_colocation_lh(child_rsc, constraint->rsc_rh, constraint);
	);
	}

	void clone_rsc_colocation_rh(
	resource_t rsc_lh, resource_t rsc_rh, rsc_colocation_t *constraint)
	{
	clone_variant_data_t *clone_data = NULL;
	CRM_CHECK(rsc_lh != NULL, return);
	CRM_CHECK(rsc_lh->variant == pe_native, return);

	get_clone_variant_data(clone_data, rsc_rh);

	crm_debug_3("Processing constraint %s: %d", constraint->id, constraint->score);

	if(rsc_rh == NULL) {
	pe_err("rsc_rh was NULL for %s", constraint->id);
	return;

	} else if(is_set(rsc_rh->flags, pe_rsc_provisional)) {
	crm_debug_3("%s is still provisional", rsc_rh->id);
	return;

	} else if(constraint->score >= INFINITY) {
	GListPtr lhs = NULL, rhs = NULL;
	lhs = rsc_lh->allowed_nodes;

	slist_iter(
	child_rsc, resource_t, rsc_rh->children, lpc,
	node_t *chosen = child_rsc->fns->location(child_rsc, NULL, FALSE);
	if(chosen != NULL) {
	rhs = g_list_append(rhs, chosen);
	}
	);

	rsc_lh->allowed_nodes = node_list_and(lhs, rhs, FALSE);

	pe_free_shallow_adv(rhs, FALSE);
	pe_free_shallow(lhs);
	return;
	}

	slist_iter(
	child_rsc, resource_t, rsc_rh->children, lpc,

	child_rsc->cmds->rsc_colocation_rh(rsc_lh, child_rsc, constraint);
	);
	}

	void clone_rsc_order_lh(resource_t rsc, order_constraint_t order, pe_working_set_t *data_set)
	{
	resource_t *r1 = NULL;
	resource_t *r2 = NULL;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	crm_debug_2("%s->%s", order->lh_action_task, order->rh_action_task);

	r1 = uber_parent(rsc);
	r2 = uber_parent(order->rh_rsc);

	if(r1 == r2) {
	native_rsc_order_lh(rsc, order, data_set);
	return;
	}

	#if 0
	if(order->type != pe_order_optional) {
	crm_debug("Upgraded ordering constraint %d - 0x%.6x", order->id, order->type);
	native_rsc_order_lh(rsc, order, data_set);
	}
	#endif

	if(order->type & pe_order_implies_left) {
	if(rsc->variant == order->rh_rsc->variant) {
	crm_debug_2("Clone-to-clone ordering: %s -> %s 0x%.6x",
	order->lh_action_task, order->rh_action_task, order->type);
	/* stop instances on the same nodes as stopping RHS instances */
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,
	native_rsc_order_lh(child_rsc, order, data_set);
	);
	} else {
	/* stop everything */
	crm_debug_2("Clone-to-* ordering: %s -> %s 0x%.6x",
	order->lh_action_task, order->rh_action_task, order->type);
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,
	native_rsc_order_lh(child_rsc, order, data_set);
	);
	}
	}

	convert_non_atomic_task(rsc, order);
	native_rsc_order_lh(rsc, order, data_set);
	}

	void clone_rsc_order_rh(
	action_t lh_action, resource_t rsc, order_constraint_t *order)
	{
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	crm_debug_2("%s->%s", lh_action->uuid, order->rh_action_task);

	native_rsc_order_rh(lh_action, rsc, order);

	}

	void clone_rsc_location(resource_t rsc, rsc_to_node_t constraint)
	{
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	crm_debug_3("Processing location constraint %s for %s",
	constraint->id, rsc->id);

	native_rsc_location(rsc, constraint);
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	child_rsc->cmds->rsc_location(child_rsc, constraint);
	);
	}

	static gint
	sort_notify_entries(gconstpointer a, gconstpointer b)
	{
	int tmp;
	const notify_entry_t *entry_a = a;
	const notify_entry_t *entry_b = b;

	if(entry_a == NULL && entry_b == NULL) { return 0; }
	if(entry_a == NULL) { return 1; }
	if(entry_b == NULL) { return -1; }

	if(entry_a->rsc == NULL && entry_b->rsc == NULL) { return 0; }
	if(entry_a->rsc == NULL) { return 1; }
	if(entry_b->rsc == NULL) { return -1; }

	tmp = strcmp(entry_a->rsc->id, entry_b->rsc->id);
	if(tmp != 0) {
	return tmp;
	}

	if(entry_a->node == NULL && entry_b->node == NULL) { return 0; }
	if(entry_a->node == NULL) { return 1; }
	if(entry_b->node == NULL) { return -1; }

	return strcmp(entry_a->node->details->id, entry_b->node->details->id);
	}

	static void
	expand_list(GListPtr list, int clones,
	char rsc_list, char node_list, char **uuid_list)
	{
	const char *uname = NULL;
	const char *rsc_id = NULL;
	const char *last_rsc_id = NULL;

	CRM_CHECK(list != NULL, return);
	if(rsc_list) {
	CRM_CHECK(rsc_list == NULL, rsc_list = NULL);
	}
	if(node_list) {
	CRM_CHECK(node_list == NULL, node_list = NULL);
	}

	slist_iter(entry, notify_entry_t, list, lpc,

	CRM_CHECK(entry != NULL, continue);
	CRM_CHECK(entry->rsc != NULL, continue);
	CRM_CHECK(entry->node != NULL, continue);

	rsc_id = entry->rsc->id;
	uname = entry->node->details->uname;

	CRM_ASSERT(uname != NULL);
	CRM_ASSERT(rsc_id != NULL);

	/* filter dups */
	if(safe_str_eq(rsc_id, last_rsc_id)) {
	continue;
	}
	last_rsc_id = rsc_id;

	if(rsc_list != NULL) {
	int existing_len = 0;
	int len = 2 + strlen(rsc_id); /* +1 space, +1 EOS */
	if(rsc_list && *rsc_list) {
	existing_len = strlen(*rsc_list);
	}

	crm_debug_5("Adding %s (%dc) at offset %d",
	rsc_id, len-2, existing_len);
	crm_realloc(*rsc_list, len + existing_len);
	sprintf(*rsc_list + existing_len, "%s ", rsc_id);
	}

	if(node_list != NULL) {
	int existing_len = 0;
	int len = 2 + strlen(uname);
	if(node_list && *node_list) {
	existing_len = strlen(*node_list);
	}

	crm_debug_5("Adding %s (%dc) at offset %d",
	uname, len-2, existing_len);
	crm_realloc(*node_list, len + existing_len);
	sprintf(*node_list + existing_len, "%s ", uname);
	}
	);
	}

	void clone_expand(resource_t rsc, pe_working_set_t data_set)
	{
	char *rsc_list = NULL;
	char *node_list = NULL;
	char *uuid_list = NULL;

	notify_data_t *n_data = NULL;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	crm_malloc0(n_data, sizeof(notify_data_t));
	n_data->keys = g_hash_table_new_full(
	g_str_hash, g_str_equal,
	g_hash_destroy_str, g_hash_destroy_str);

	crm_debug_2("Processing actions from %s", rsc->id);


	if(is_set(rsc->flags, pe_rsc_notify)) {
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	slist_iter(
	op, action_t, rsc->actions, lpc2,

	child_rsc->cmds->create_notify_element(
	child_rsc, op, n_data, data_set);
	);
	);
	}

	/* expand the notify data */
	if(is_set(rsc->flags, pe_rsc_notify) && n_data->stop) {
	n_data->stop = g_list_sort(
	n_data->stop, sort_notify_entries);
	rsc_list = NULL; node_list = NULL;
	expand_list(n_data->stop, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_stop_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_stop_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->start) {
	n_data->start = g_list_sort(
	n_data->start, sort_notify_entries);
	rsc_list = NULL; node_list = NULL;
	expand_list(n_data->start, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_start_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_start_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->demote) {
	n_data->demote = g_list_sort(
	n_data->demote, sort_notify_entries);
	rsc_list = NULL; node_list = NULL;
	expand_list(n_data->demote, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_demote_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_demote_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->promote) {
	n_data->promote = g_list_sort(
	n_data->promote, sort_notify_entries);
	rsc_list = NULL; node_list = NULL; uuid_list = NULL;
	expand_list(n_data->promote, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_promote_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_promote_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->active) {
	n_data->active = g_list_sort(
	n_data->active, sort_notify_entries);
	rsc_list = NULL; node_list = NULL; uuid_list = NULL;
	expand_list(n_data->active, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_active_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_active_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->slave) {
	n_data->slave = g_list_sort(
	n_data->slave, sort_notify_entries);
	rsc_list = NULL; node_list = NULL; uuid_list = NULL;
	expand_list(n_data->slave, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_slave_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_slave_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->master) {
	n_data->master = g_list_sort(
	n_data->master, sort_notify_entries);
	rsc_list = NULL; node_list = NULL; uuid_list = NULL;
	expand_list(n_data->master, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_master_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_master_uname"), node_list);
	}

	if(is_set(rsc->flags, pe_rsc_notify) && n_data->inactive) {
	n_data->inactive = g_list_sort(
	n_data->inactive, sort_notify_entries);
	rsc_list = NULL; node_list = NULL; uuid_list = NULL;
	expand_list(n_data->inactive, clone_data->clone_max,
	&rsc_list, &node_list, &uuid_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_inactive_resource"), rsc_list);
	g_hash_table_insert(
	n_data->keys,
	crm_strdup("notify_inactive_uname"), node_list);
	}

	/* yes, we DO need this second loop */
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	child_rsc->cmds->expand(child_rsc, data_set);

	);

	/* slist_iter( */
	/* action, action_t, rsc->actions, lpc2, */

	/* if(safe_str_eq(action->task, CRMD_ACTION_NOTIFY)) { */
	/* action->meta_xml = notify_xml; */
	/* } */
	/* ); */

	native_expand(rsc, data_set);

	/* destroy the notify_data */
	pe_free_shallow(n_data->stop);
	pe_free_shallow(n_data->start);
	pe_free_shallow(n_data->demote);
	pe_free_shallow(n_data->promote);
	pe_free_shallow(n_data->master);
	pe_free_shallow(n_data->slave);
	pe_free_shallow(n_data->active);
	pe_free_shallow(n_data->inactive);
	g_hash_table_destroy(n_data->keys);
	crm_free(n_data);
	}


	static gint sort_rsc_id(gconstpointer a, gconstpointer b)
	{
	const resource_t resource1 = (const resource_t)a;
	const resource_t resource2 = (const resource_t)b;

	CRM_ASSERT(resource1 != NULL);
	CRM_ASSERT(resource2 != NULL);

	return strcmp(resource1->id, resource2->id);
	}

	static resource_t find_instance_on(resource_t rsc, node_t *node)
	{
	slist_iter(child, resource_t, rsc->children, lpc,

	slist_iter(known ,node_t, child->known_on, lpc2,
	if(node->details == known->details) {
	return child;
	}
	);
	);
	return NULL;
	}

	gboolean
	clone_create_probe(resource_t rsc, node_t node, action_t *complete,
	gboolean force, pe_working_set_t *data_set)
	{
	gboolean any_created = FALSE;
	clone_variant_data_t *clone_data = NULL;
	get_clone_variant_data(clone_data, rsc);

	rsc->children = g_list_sort(rsc->children, sort_rsc_id);

	if(is_not_set(rsc->flags, pe_rsc_unique)
	&& clone_data->clone_node_max == 1) {
	/* only look for one copy */
	resource_t *child = NULL;

	/* Try whoever we probed last time */
	child = find_instance_on(rsc, node);
	if(child) {
	return child->cmds->create_probe(
	child, node, complete, force, data_set);
	}

	/* Try whoever we plan on starting there */
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	node_t *local_node = child_rsc->fns->location(child_rsc, NULL, FALSE);
	if(local_node == NULL) {
	continue;
	}

	if(local_node->details == node->details) {
	return child_rsc->cmds->create_probe(
	child_rsc, node, complete, force, data_set);
	}
	);

	/* Fall back to the first clone instance */
	child = rsc->children->data;
	return child->cmds->create_probe(child, node, complete, force, data_set);

	}
	slist_iter(
	child_rsc, resource_t, rsc->children, lpc,

	if(child_rsc->cmds->create_probe(
	child_rsc, node, complete, force, data_set)) {
	any_created = TRUE;
	}

	if(any_created
	&& is_not_set(rsc->flags, pe_rsc_unique)
	&& clone_data->clone_node_max == 1) {
	/* only look for one copy (clone :0) */
	break;
	}
	);

	return any_created;
	}

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