pcmk_sched_clone.c
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pcmk_sched_clone.c
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	/*
	* Copyright 2004-2022 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#include <crm/msg_xml.h>
	#include <pacemaker-internal.h>

	#include "libpacemaker_private.h"

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

	static void append_parent_colocation(pe_resource_t * rsc, pe_resource_t * child, gboolean all);

	static pe_node_t *
	can_run_instance(pe_resource_t * rsc, pe_node_t * node, int limit)
	{
	pe_node_t *local_node = NULL;

	if (node == NULL && rsc->allowed_nodes) {
	GHashTableIter iter;
	g_hash_table_iter_init(&iter, rsc->allowed_nodes);
	while (g_hash_table_iter_next(&iter, NULL, (void **)&local_node)) {
	can_run_instance(rsc, local_node, limit);
	}
	return NULL;
	}

	if (!node) {
	/* make clang analyzer happy */
	goto bail;

	} else if (!pcmk__node_available(node, false, false)) {
	goto bail;

	} else if (pcmk_is_set(rsc->flags, pe_rsc_orphan)) {
	goto bail;
	}

	local_node = pcmk__top_allowed_node(rsc, node);

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

	} else if (local_node->weight < 0) {
	common_update_score(rsc, node->details->id, local_node->weight);
	pe_rsc_trace(rsc, "%s cannot run on %s: Parent node weight doesn't allow it.",
	rsc->id, pe__node_name(node));

	} else if (local_node->count < limit) {
	pe_rsc_trace(rsc, "%s can run on %s (already running %d)",
	rsc->id, pe__node_name(node), local_node->count);
	return local_node;

	} else {
	pe_rsc_trace(rsc, "%s cannot run on %s: node full (%d >= %d)",
	rsc->id, pe__node_name(node), local_node->count, limit);
	}

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

	static pe_node_t *
	allocate_instance(pe_resource_t rsc, pe_node_t prefer, gboolean all_coloc,
	int limit, pe_working_set_t *data_set)
	{
	pe_node_t *chosen = NULL;
	GHashTable *backup = NULL;

	CRM_ASSERT(rsc);
	pe_rsc_trace(rsc, "Checking allocation of %s (preferring %s, using %s parent colocations)",
	rsc->id, (prefer? prefer->details->uname: "none"),
	(all_coloc? "all" : "some"));

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

	} else if (pcmk_is_set(rsc->flags, pe_rsc_allocating)) {
	pe_rsc_debug(rsc, "Dependency loop detected involving %s", rsc->id);
	return NULL;
	}

	/* Only include positive colocation preferences of dependent resources
	* if not every node will get a copy of the clone
	*/
	append_parent_colocation(rsc->parent, rsc, all_coloc);

	if (prefer) {
	pe_node_t *local_prefer = g_hash_table_lookup(rsc->allowed_nodes, prefer->details->id);

	if (local_prefer == NULL \|\| local_prefer->weight < 0) {
	pe_rsc_trace(rsc, "Not pre-allocating %s to %s - unavailable", rsc->id,
	pe__node_name(prefer));
	return NULL;
	}
	}

	can_run_instance(rsc, NULL, limit);

	backup = pcmk__copy_node_table(rsc->allowed_nodes);
	pe_rsc_trace(rsc, "Allocating instance %s", rsc->id);
	chosen = rsc->cmds->assign(rsc, prefer);
	if (chosen && prefer && (chosen->details != prefer->details)) {
	crm_info("Not pre-allocating %s to %s because %s is better",
	rsc->id, pe__node_name(prefer), pe__node_name(chosen));
	g_hash_table_destroy(rsc->allowed_nodes);
	rsc->allowed_nodes = backup;
	pcmk__unassign_resource(rsc);
	chosen = NULL;
	backup = NULL;
	}
	if (chosen) {
	pe_node_t *local_node = pcmk__top_allowed_node(rsc, chosen);

	if (local_node) {
	local_node->count++;

	} else if (pcmk_is_set(rsc->flags, pe_rsc_managed)) {
	/* what to do? we can't enforce per-node limits in this case */
	pcmk__config_err("%s not found in %s (list of %d)",
	chosen->details->id, rsc->parent->id,
	g_hash_table_size(rsc->parent->allowed_nodes));
	}
	}

	if(backup) {
	g_hash_table_destroy(backup);
	}
	return chosen;
	}

	static void
	append_parent_colocation(pe_resource_t * rsc, pe_resource_t * child, gboolean all)
	{

	GList *gIter = NULL;

	gIter = rsc->rsc_cons;
	for (; gIter != NULL; gIter = gIter->next) {
	pcmk__colocation_t cons = (pcmk__colocation_t ) gIter->data;

	if (all \|\| cons->score < 0 \|\| cons->score == INFINITY) {
	pcmk__add_this_with(child, cons);
	}
	}

	gIter = rsc->rsc_cons_lhs;
	for (; gIter != NULL; gIter = gIter->next) {
	pcmk__colocation_t cons = (pcmk__colocation_t ) gIter->data;

	if (!pcmk__colocation_has_influence(cons, child)) {
	continue;
	}
	if (all \|\| cons->score < 0) {
	pcmk__add_with_this(child, cons);
	}
	}
	}


	void
	distribute_children(pe_resource_t rsc, GList children, GList *nodes,
	int max, int per_host_max, pe_working_set_t * data_set);

	void
	distribute_children(pe_resource_t rsc, GList children, GList *nodes,
	int max, int per_host_max, pe_working_set_t * data_set)
	{
	int loop_max = 0;
	int allocated = 0;
	int available_nodes = 0;
	bool all_coloc = false;

	/* count now tracks the number of clones currently allocated */
	for(GList *nIter = nodes; nIter != NULL; nIter = nIter->next) {
	pe_node_t *node = nIter->data;

	node->count = 0;
	if (pcmk__node_available(node, false, false)) {
	available_nodes++;
	}
	}

	all_coloc = (max < available_nodes) ? true : false;

	if(available_nodes) {
	loop_max = max / available_nodes;
	}
	if (loop_max < 1) {
	loop_max = 1;
	}

	pe_rsc_debug(rsc, "Allocating up to %d %s instances to a possible %d nodes (at most %d per host, %d optimal)",
	max, rsc->id, available_nodes, per_host_max, loop_max);

	/* Pre-allocate as many instances as we can to their current location */
	for (GList *gIter = children; gIter != NULL && allocated < max; gIter = gIter->next) {
	pe_resource_t child = (pe_resource_t ) gIter->data;
	pe_node_t *child_node = NULL;
	pe_node_t *local_node = NULL;

	if ((child->running_on == NULL)
	\|\| !pcmk_is_set(child->flags, pe_rsc_provisional)
	\|\| pcmk_is_set(child->flags, pe_rsc_failed)) {

	continue;
	}

	child_node = pe__current_node(child);
	local_node = pcmk__top_allowed_node(child, child_node);

	pe_rsc_trace(rsc,
	"Checking pre-allocation of %s to %s (%d remaining of %d)",
	child->id, pe__node_name(child_node), max - allocated,
	max);

	if (!pcmk__node_available(child_node, true, false)) {
	pe_rsc_trace(rsc, "Not pre-allocating because %s can not run %s",
	pe__node_name(child_node), child->id);
	continue;
	}

	if ((local_node != NULL) && (local_node->count >= loop_max)) {
	pe_rsc_trace(rsc,
	"Not pre-allocating because %s already allocated "
	"optimal instances", pe__node_name(child_node));
	continue;
	}

	if (allocate_instance(child, child_node, all_coloc, per_host_max,
	data_set)) {
	pe_rsc_trace(rsc, "Pre-allocated %s to %s", child->id,
	pe__node_name(child_node));
	allocated++;
	}
	}

	pe_rsc_trace(rsc, "Done pre-allocating (%d of %d)", allocated, max);

	for (GList *gIter = children; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child = (pe_resource_t ) gIter->data;

	if (child->running_on != NULL) {
	pe_node_t *child_node = pe__current_node(child);
	pe_node_t *local_node = pcmk__top_allowed_node(child, child_node);

	if (local_node == NULL) {
	crm_err("%s is running on %s which isn't allowed",
	child->id, pe__node_name(child_node));
	}
	}

	if (!pcmk_is_set(child->flags, pe_rsc_provisional)) {
	} else if (allocated >= max) {
	pe_rsc_debug(rsc, "Child %s not allocated - limit reached %d %d", child->id, allocated, max);
	resource_location(child, NULL, -INFINITY, "clone:limit_reached", data_set);
	} else {
	if (allocate_instance(child, NULL, all_coloc, per_host_max,
	data_set)) {
	allocated++;
	}
	}
	}

	pe_rsc_debug(rsc, "Allocated %d %s instances of a possible %d",
	allocated, rsc->id, max);
	}

	/*!
	* \internal
	* \brief Assign a clone resource to a node
	*
	* \param[in,out] rsc Resource to assign to a node
	* \param[in] prefer Node to prefer, if all else is equal
	*
	* \return Node that \p rsc is assigned to, if assigned entirely to one node
	*/
	pe_node_t *
	pcmk__clone_allocate(pe_resource_t rsc, const pe_node_t prefer)
	{
	GList *nodes = NULL;
	clone_variant_data_t *clone_data = NULL;

	get_clone_variant_data(clone_data, rsc);

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

	} else if (pcmk_is_set(rsc->flags, pe_rsc_allocating)) {
	pe_rsc_debug(rsc, "Dependency loop detected involving %s", rsc->id);
	return NULL;
	}

	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	pcmk__add_promotion_scores(rsc);
	}

	pe__set_resource_flags(rsc, pe_rsc_allocating);

	/* This information is used by pcmk__cmp_instance() when deciding the order
	* in which to assign clone instances to nodes.
	*/
	for (GList *gIter = rsc->rsc_cons; gIter != NULL; gIter = gIter->next) {
	pcmk__colocation_t constraint = (pcmk__colocation_t ) gIter->data;

	pe_rsc_trace(rsc, "%s: Allocating %s first",
	rsc->id, constraint->primary->id);
	constraint->primary->cmds->assign(constraint->primary, prefer);
	}

	for (GList *gIter = rsc->rsc_cons_lhs; gIter != NULL; gIter = gIter->next) {
	pcmk__colocation_t constraint = (pcmk__colocation_t ) gIter->data;

	if (pcmk__colocation_has_influence(constraint, NULL)) {
	pe_resource_t *dependent = constraint->dependent;
	const char *attr = constraint->node_attribute;
	const float factor = constraint->score / (float) INFINITY;
	const uint32_t flags = pcmk__coloc_select_active
	\|pcmk__coloc_select_nonnegative;

	pcmk__add_colocated_node_scores(dependent, rsc->id,
	&rsc->allowed_nodes, attr, factor,
	flags);
	}
	}

	pe__show_node_weights(!pcmk_is_set(rsc->cluster->flags, pe_flag_show_scores),
	rsc, __func__, rsc->allowed_nodes, rsc->cluster);

	nodes = g_hash_table_get_values(rsc->allowed_nodes);
	nodes = pcmk__sort_nodes(nodes, NULL);
	rsc->children = g_list_sort(rsc->children, pcmk__cmp_instance);
	distribute_children(rsc, rsc->children, nodes, clone_data->clone_max,
	clone_data->clone_node_max, rsc->cluster);
	g_list_free(nodes);

	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	pcmk__set_instance_roles(rsc);
	}

	pe__clear_resource_flags(rsc, pe_rsc_provisional\|pe_rsc_allocating);
	pe_rsc_trace(rsc, "Done allocating %s", rsc->id);
	return NULL;
	}

	static void
	clone_update_pseudo_status(pe_resource_t * rsc, gboolean * stopping, gboolean * starting,
	gboolean * active)
	{
	GList *gIter = NULL;

	if (rsc->children) {

	gIter = rsc->children;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child = (pe_resource_t ) gIter->data;

	clone_update_pseudo_status(child, stopping, starting, active);
	}

	return;
	}

	CRM_ASSERT(active != NULL);
	CRM_ASSERT(starting != NULL);
	CRM_ASSERT(stopping != NULL);

	if (rsc->running_on) {
	*active = TRUE;
	}

	gIter = rsc->actions;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_action_t action = (pe_action_t ) gIter->data;

	if (starting && stopping) {
	return;

	} else if (pcmk_is_set(action->flags, pe_action_optional)) {
	pe_rsc_trace(rsc, "Skipping optional: %s", action->uuid);
	continue;

	} else if (!pcmk_any_flags_set(action->flags,
	pe_action_pseudo\|pe_action_runnable)) {
	pe_rsc_trace(rsc, "Skipping unrunnable: %s", action->uuid);
	continue;

	} else if (pcmk__str_eq(RSC_STOP, action->task, pcmk__str_casei)) {
	pe_rsc_trace(rsc, "Stopping due to: %s", action->uuid);
	*stopping = TRUE;

	} else if (pcmk__str_eq(RSC_START, action->task, pcmk__str_casei)) {
	if (!pcmk_is_set(action->flags, pe_action_runnable)) {
	pe_rsc_trace(rsc, "Skipping pseudo-op: %s run=%d, pseudo=%d",
	action->uuid,
	pcmk_is_set(action->flags, pe_action_runnable),
	pcmk_is_set(action->flags, pe_action_pseudo));
	} else {
	pe_rsc_trace(rsc, "Starting due to: %s", action->uuid);
	pe_rsc_trace(rsc, "%s run=%d, pseudo=%d",
	action->uuid,
	pcmk_is_set(action->flags, pe_action_runnable),
	pcmk_is_set(action->flags, pe_action_pseudo));
	*starting = TRUE;
	}
	}
	}
	}

	static pe_action_t *
	find_rsc_action(pe_resource_t rsc, const char task)
	{
	pe_action_t *match = NULL;
	GList *actions = pe__resource_actions(rsc, NULL, task, FALSE);

	for (GList *item = actions; item != NULL; item = item->next) {
	pe_action_t op = (pe_action_t ) item->data;

	if (!pcmk_is_set(op->flags, pe_action_optional)) {
	if (match != NULL) {
	// More than one match, don't return any
	match = NULL;
	break;
	}
	match = op;
	}
	}
	g_list_free(actions);
	return match;
	}

	static void
	child_ordering_constraints(pe_resource_t * rsc, pe_working_set_t * data_set)
	{
	pe_action_t *stop = NULL;
	pe_action_t *start = NULL;
	pe_action_t *last_stop = NULL;
	pe_action_t *last_start = NULL;
	GList *gIter = NULL;

	if (!pe__clone_is_ordered(rsc)) {
	return;
	}

	/* we have to maintain a consistent sorted child list when building order constraints */
	rsc->children = g_list_sort(rsc->children, pcmk__cmp_instance_number);

	for (gIter = rsc->children; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child = (pe_resource_t ) gIter->data;

	stop = find_rsc_action(child, RSC_STOP);
	if (stop) {
	if (last_stop) {
	/* child/child relative stop */
	order_actions(stop, last_stop, pe_order_optional);
	}
	last_stop = stop;
	}

	start = find_rsc_action(child, RSC_START);
	if (start) {
	if (last_start) {
	/* child/child relative start */
	order_actions(last_start, start, pe_order_optional);
	}
	last_start = start;
	}
	}
	}

	void
	clone_create_actions(pe_resource_t *rsc)
	{
	clone_variant_data_t *clone_data = NULL;

	get_clone_variant_data(clone_data, rsc);

	pe_rsc_debug(rsc, "Creating actions for clone %s", rsc->id);
	clone_create_pseudo_actions(rsc, rsc->children, &clone_data->start_notify,
	&clone_data->stop_notify);
	child_ordering_constraints(rsc, rsc->cluster);

	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	pcmk__create_promotable_actions(rsc);
	}
	}

	void
	clone_create_pseudo_actions(pe_resource_t rsc, GList children,
	notify_data_t **start_notify,
	notify_data_t **stop_notify)
	{
	gboolean child_active = FALSE;
	gboolean child_starting = FALSE;
	gboolean child_stopping = FALSE;
	gboolean allow_dependent_migrations = TRUE;

	pe_action_t *stop = NULL;
	pe_action_t *stopped = NULL;

	pe_action_t *start = NULL;
	pe_action_t *started = NULL;

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

	for (GList *gIter = children; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;
	gboolean starting = FALSE;
	gboolean stopping = FALSE;

	child_rsc->cmds->create_actions(child_rsc);
	clone_update_pseudo_status(child_rsc, &stopping, &starting, &child_active);
	if (stopping && starting) {
	allow_dependent_migrations = FALSE;
	}

	child_stopping \|= stopping;
	child_starting \|= starting;
	}

	/* start */
	start = pe__new_rsc_pseudo_action(rsc, RSC_START, !child_starting, true);
	started = pe__new_rsc_pseudo_action(rsc, RSC_STARTED, !child_starting,
	false);
	started->priority = INFINITY;

	if (child_active \|\| child_starting) {
	pe__set_action_flags(started, pe_action_runnable);
	}

	if (start_notify != NULL && *start_notify == NULL) {
	*start_notify = pe__clone_notif_pseudo_ops(rsc, RSC_START, start,
	started);
	}

	/* stop */
	stop = pe__new_rsc_pseudo_action(rsc, RSC_STOP, !child_stopping, true);
	stopped = pe__new_rsc_pseudo_action(rsc, RSC_STOPPED, !child_stopping,
	true);
	stopped->priority = INFINITY;
	if (allow_dependent_migrations) {
	pe__set_action_flags(stop, pe_action_migrate_runnable);
	}

	if (stop_notify != NULL && *stop_notify == NULL) {
	*stop_notify = pe__clone_notif_pseudo_ops(rsc, RSC_STOP, stop, stopped);

	if (start_notify && start_notify && stop_notify) {
	order_actions((stop_notify)->post_done, (start_notify)->pre, pe_order_optional);
	}
	}
	}

	void
	clone_internal_constraints(pe_resource_t *rsc)
	{
	pe_resource_t *last_rsc = NULL;
	GList *gIter;
	bool ordered = pe__clone_is_ordered(rsc);

	pe_rsc_trace(rsc, "Internal constraints for %s", rsc->id);
	pcmk__order_resource_actions(rsc, RSC_STOPPED, rsc, RSC_START,
	pe_order_optional);
	pcmk__order_resource_actions(rsc, RSC_START, rsc, RSC_STARTED,
	pe_order_runnable_left);
	pcmk__order_resource_actions(rsc, RSC_STOP, rsc, RSC_STOPPED,
	pe_order_runnable_left);

	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	pcmk__order_resource_actions(rsc, RSC_DEMOTED, rsc, RSC_STOP,
	pe_order_optional);
	pcmk__order_resource_actions(rsc, RSC_STARTED, rsc, RSC_PROMOTE,
	pe_order_runnable_left);
	}

	if (ordered) {
	/* we have to maintain a consistent sorted child list when building order constraints */
	rsc->children = g_list_sort(rsc->children, pcmk__cmp_instance_number);
	}
	for (gIter = rsc->children; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;

	child_rsc->cmds->internal_constraints(child_rsc);

	pcmk__order_starts(rsc, child_rsc,
	pe_order_runnable_left\|pe_order_implies_first_printed);
	pcmk__order_resource_actions(child_rsc, RSC_START, rsc, RSC_STARTED,
	pe_order_implies_then_printed);
	if (ordered && (last_rsc != NULL)) {
	pcmk__order_starts(last_rsc, child_rsc, pe_order_optional);
	}

	pcmk__order_stops(rsc, child_rsc, pe_order_implies_first_printed);
	pcmk__order_resource_actions(child_rsc, RSC_STOP, rsc, RSC_STOPPED,
	pe_order_implies_then_printed);
	if (ordered && (last_rsc != NULL)) {
	pcmk__order_stops(child_rsc, last_rsc, pe_order_optional);
	}

	last_rsc = child_rsc;
	}
	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	pcmk__order_promotable_instances(rsc);
	}
	}

	gboolean
	is_child_compatible(const pe_resource_t child_rsc, const pe_node_t local_node,
	enum rsc_role_e filter, gboolean current)
	{
	pe_node_t *node = NULL;
	enum rsc_role_e next_role = child_rsc->fns->state(child_rsc, current);

	CRM_CHECK(child_rsc && local_node, return FALSE);
	if (is_set_recursive(child_rsc, pe_rsc_block, TRUE) == FALSE) {
	/* We only want instances that haven't failed */
	node = child_rsc->fns->location(child_rsc, NULL, current);
	}

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

	if (node && (node->details == local_node->details)) {
	return TRUE;

	} else if (node) {
	crm_trace("%s - %s vs %s", child_rsc->id, pe__node_name(node),
	pe__node_name(local_node));

	} else {
	crm_trace("%s - not allocated %d", child_rsc->id, current);
	}
	return FALSE;
	}

	pe_resource_t *
	find_compatible_child(const pe_resource_t *local_child,
	const pe_resource_t *rsc, enum rsc_role_e filter,
	gboolean current)
	{
	pe_resource_t *pair = NULL;
	GList *gIter = NULL;
	GList *scratch = NULL;
	pe_node_t *local_node = NULL;

	local_node = local_child->fns->location(local_child, NULL, current);
	if (local_node) {
	return find_compatible_child_by_node(local_child, local_node, rsc, filter, current);
	}

	scratch = g_hash_table_get_values(local_child->allowed_nodes);
	scratch = pcmk__sort_nodes(scratch, NULL);

	gIter = scratch;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_node_t node = (pe_node_t ) gIter->data;

	pair = find_compatible_child_by_node(local_child, node, rsc, filter, current);
	if (pair) {
	goto done;
	}
	}

	pe_rsc_debug(rsc, "Can't pair %s with %s", local_child->id, rsc->id);
	done:
	g_list_free(scratch);
	return pair;
	}

	/*!
	* \internal
	* \brief Apply a colocation's score to node weights or resource priority
	*
	* Given a colocation constraint, apply its score to the dependent's
	* allowed node weights (if we are still placing resources) or priority (if
	* we are choosing promotable clone instance roles).
	*
	* \param[in,out] dependent Dependent resource in colocation
	* \param[in] primary Primary resource in colocation
	* \param[in] colocation Colocation constraint to apply
	* \param[in] for_dependent true if called on behalf of dependent
	*/
	void
	pcmk__clone_apply_coloc_score(pe_resource_t *dependent,
	const pe_resource_t *primary,
	const pcmk__colocation_t *colocation,
	bool for_dependent)
	{
	GList *gIter = NULL;
	gboolean do_interleave = FALSE;
	const char *interleave_s = NULL;

	/* This should never be called for the clone itself as a dependent. Instead,
	* we add its colocation constraints to its instances and call the
	* apply_coloc_score() for the instances as dependents.
	*/
	CRM_ASSERT(!for_dependent);

	CRM_CHECK((colocation != NULL) && (dependent != NULL) && (primary != NULL),
	return);
	CRM_CHECK(dependent->variant == pe_native, return);

	pe_rsc_trace(primary, "Processing constraint %s: %s -> %s %d",
	colocation->id, dependent->id, primary->id, colocation->score);

	if (pcmk_is_set(primary->flags, pe_rsc_promotable)) {
	if (pcmk_is_set(primary->flags, pe_rsc_provisional)) {
	// We haven't placed the primary yet, so we can't apply colocation
	pe_rsc_trace(primary, "%s is still provisional", primary->id);
	return;

	} else if (colocation->primary_role == RSC_ROLE_UNKNOWN) {
	// This isn't a role-specfic colocation, so handle normally
	pe_rsc_trace(primary, "Handling %s as a clone colocation",
	colocation->id);

	} else if (pcmk_is_set(dependent->flags, pe_rsc_provisional)) {
	// We're placing the dependent
	pcmk__update_dependent_with_promotable(primary, dependent,
	colocation);
	return;

	} else if (colocation->dependent_role == RSC_ROLE_PROMOTED) {
	// We're choosing roles for the dependent
	pcmk__update_promotable_dependent_priority(primary, dependent,
	colocation);
	return;
	}
	}

	// Only the dependent needs to be marked for interleave
	interleave_s = g_hash_table_lookup(colocation->dependent->meta,
	XML_RSC_ATTR_INTERLEAVE);
	if (crm_is_true(interleave_s)
	&& (colocation->dependent->variant > pe_group)) {
	/* @TODO Do we actually care about multiple primary copies sharing a
	* dependent copy anymore?
	*/
	if (copies_per_node(colocation->dependent) != copies_per_node(colocation->primary)) {
	pcmk__config_err("Cannot interleave %s and %s because they do not "
	"support the same number of instances per node",
	colocation->dependent->id,
	colocation->primary->id);

	} else {
	do_interleave = TRUE;
	}
	}

	if (pcmk_is_set(primary->flags, pe_rsc_provisional)) {
	pe_rsc_trace(primary, "%s is still provisional", primary->id);
	return;

	} else if (do_interleave) {
	pe_resource_t *primary_instance = NULL;

	primary_instance = find_compatible_child(dependent, primary,
	RSC_ROLE_UNKNOWN, FALSE);
	if (primary_instance != NULL) {
	pe_rsc_debug(primary, "Pairing %s with %s",
	dependent->id, primary_instance->id);
	dependent->cmds->apply_coloc_score(dependent, primary_instance,
	colocation, true);

	} else if (colocation->score >= INFINITY) {
	crm_notice("Cannot pair %s with instance of %s",
	dependent->id, primary->id);
	pcmk__assign_resource(dependent, NULL, true);

	} else {
	pe_rsc_debug(primary, "Cannot pair %s with instance of %s",
	dependent->id, primary->id);
	}

	return;

	} else if (colocation->score >= INFINITY) {
	GList *affected_nodes = NULL;

	gIter = primary->children;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;
	pe_node_t *chosen = child_rsc->fns->location(child_rsc, NULL, FALSE);

	if (chosen != NULL && is_set_recursive(child_rsc, pe_rsc_block, TRUE) == FALSE) {
	pe_rsc_trace(primary, "Allowing %s: %s %d",
	colocation->id, pe__node_name(chosen),
	chosen->weight);
	affected_nodes = g_list_prepend(affected_nodes, chosen);
	}
	}

	node_list_exclude(dependent->allowed_nodes, affected_nodes, FALSE);
	g_list_free(affected_nodes);
	return;
	}

	gIter = primary->children;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;

	child_rsc->cmds->apply_coloc_score(dependent, child_rsc, colocation,
	false);
	}
	}

	enum action_tasks
	clone_child_action(pe_action_t * action)
	{
	enum action_tasks result = no_action;
	pe_resource_t child = (pe_resource_t ) action->rsc->children->data;

	if (pcmk__strcase_any_of(action->task, "notify", "notified", NULL)) {

	/* Find the action we're notifying about instead */

	int stop = 0;
	char *key = action->uuid;
	int lpc = strlen(key);

	for (; lpc > 0; lpc--) {
	if (key[lpc] == '_' && stop == 0) {
	stop = lpc;

	} else if (key[lpc] == '_') {
	char *task_mutable = NULL;

	lpc++;
	task_mutable = strdup(key + lpc);
	task_mutable[stop - lpc] = 0;

	crm_trace("Extracted action '%s' from '%s'", task_mutable, key);
	result = get_complex_task(child, task_mutable, TRUE);
	free(task_mutable);
	break;
	}
	}

	} else {
	result = get_complex_task(child, action->task, TRUE);
	}
	return result;
	}

	#define pe__clear_action_summary_flags(flags, action, flag) do { \
	flags = pcmk__clear_flags_as(__func__, __LINE__, LOG_TRACE, \
	"Action summary", action->rsc->id, \
	flags, flag, #flag); \
	} while (0)

	enum pe_action_flags
	summary_action_flags(pe_action_t action, GList children,
	const pe_node_t *node)
	{
	GList *gIter = NULL;
	gboolean any_runnable = FALSE;
	gboolean check_runnable = TRUE;
	enum action_tasks task = clone_child_action(action);
	enum pe_action_flags flags = (pe_action_optional \| pe_action_runnable \| pe_action_pseudo);
	const char *task_s = task2text(task);

	for (gIter = children; gIter != NULL; gIter = gIter->next) {
	pe_action_t *child_action = NULL;
	pe_resource_t child = (pe_resource_t ) gIter->data;

	child_action = find_first_action(child->actions, NULL, task_s, child->children ? NULL : node);
	pe_rsc_trace(action->rsc, "Checking for %s in %s on %s (%s)", task_s, child->id,
	pe__node_name(node), child_action?child_action->uuid:"NA");
	if (child_action) {
	enum pe_action_flags child_flags = child->cmds->action_flags(child_action, node);

	if (pcmk_is_set(flags, pe_action_optional)
	&& !pcmk_is_set(child_flags, pe_action_optional)) {
	pe_rsc_trace(child, "%s is mandatory because of %s", action->uuid,
	child_action->uuid);
	pe__clear_action_summary_flags(flags, action, pe_action_optional);
	pe__clear_action_flags(action, pe_action_optional);
	}
	if (pcmk_is_set(child_flags, pe_action_runnable)) {
	any_runnable = TRUE;
	}
	}
	}

	if (check_runnable && any_runnable == FALSE) {
	pe_rsc_trace(action->rsc, "%s is not runnable because no children are", action->uuid);
	pe__clear_action_summary_flags(flags, action, pe_action_runnable);
	if (node == NULL) {
	pe__clear_action_flags(action, pe_action_runnable);
	}
	}

	return flags;
	}

	enum pe_action_flags
	clone_action_flags(pe_action_t action, const pe_node_t node)
	{
	return summary_action_flags(action, action->rsc->children, node);
	}

	void
	clone_rsc_location(pe_resource_t rsc, pe__location_t constraint)
	{
	GList *gIter = rsc->children;

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

	pcmk__apply_location(rsc, constraint);

	for (; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;

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

	/*!
	* \internal
	* \brief Add a resource's actions to the transition graph
	*
	* \param[in] rsc Resource whose actions should be added
	*/
	void
	clone_expand(pe_resource_t *rsc)
	{
	GList *gIter = NULL;
	clone_variant_data_t *clone_data = NULL;

	get_clone_variant_data(clone_data, rsc);

	g_list_foreach(rsc->actions, (GFunc) rsc->cmds->action_flags, NULL);

	pe__create_notifications(rsc, clone_data->start_notify);
	pe__create_notifications(rsc, clone_data->stop_notify);
	pe__create_notifications(rsc, clone_data->promote_notify);
	pe__create_notifications(rsc, clone_data->demote_notify);

	/* Now that the notifcations have been created we can expand the children */

	gIter = rsc->children;
	for (; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child_rsc = (pe_resource_t ) gIter->data;

	child_rsc->cmds->add_actions_to_graph(child_rsc);
	}

	pcmk__add_rsc_actions_to_graph(rsc);

	/* The notifications are in the graph now, we can destroy the notify_data */
	pe__free_notification_data(clone_data->demote_notify);
	clone_data->demote_notify = NULL;
	pe__free_notification_data(clone_data->stop_notify);
	clone_data->stop_notify = NULL;
	pe__free_notification_data(clone_data->start_notify);
	clone_data->start_notify = NULL;
	pe__free_notification_data(clone_data->promote_notify);
	clone_data->promote_notify = NULL;
	}

	// Check whether a resource or any of its children is known on node
	static bool
	rsc_known_on(const pe_resource_t rsc, const pe_node_t node)
	{
	if (rsc->children) {
	for (GList *child_iter = rsc->children; child_iter != NULL;
	child_iter = child_iter->next) {

	pe_resource_t child = (pe_resource_t ) child_iter->data;

	if (rsc_known_on(child, node)) {
	return TRUE;
	}
	}

	} else if (rsc->known_on) {
	GHashTableIter iter;
	pe_node_t *known_node = NULL;

	g_hash_table_iter_init(&iter, rsc->known_on);
	while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &known_node)) {
	if (node->details == known_node->details) {
	return TRUE;
	}
	}
	}
	return FALSE;
	}

	// Look for an instance of clone that is known on node
	static pe_resource_t *
	find_instance_on(const pe_resource_t clone, const pe_node_t node)
	{
	for (GList *gIter = clone->children; gIter != NULL; gIter = gIter->next) {
	pe_resource_t child = (pe_resource_t ) gIter->data;

	if (rsc_known_on(child, node)) {
	return child;
	}
	}
	return NULL;
	}

	// For anonymous clones, only a single instance needs to be probed
	static bool
	probe_anonymous_clone(pe_resource_t rsc, pe_node_t node,
	pe_working_set_t *data_set)
	{
	// First, check if we probed an instance on this node last time
	pe_resource_t *child = find_instance_on(rsc, node);

	// Otherwise, check if we plan to start an instance on this node
	if (child == NULL) {
	for (GList *child_iter = rsc->children; child_iter && !child;
	child_iter = child_iter->next) {

	pe_node_t *local_node = NULL;
	pe_resource_t child_rsc = (pe_resource_t ) child_iter->data;

	if (child_rsc) { /* make clang analyzer happy */
	local_node = child_rsc->fns->location(child_rsc, NULL, FALSE);
	if (local_node && (local_node->details == node->details)) {
	child = child_rsc;
	}
	}
	}
	}

	// Otherwise, use the first clone instance
	if (child == NULL) {
	child = rsc->children->data;
	}
	CRM_ASSERT(child);
	return child->cmds->create_probe(child, node);
	}

	/*!
	* \internal
	*
	* \brief Schedule any probes needed for a resource on a node
	*
	* \param[in] rsc Resource to create probe for
	* \param[in] node Node to create probe on
	*
	* \return true if any probe was created, otherwise false
	*/
	bool
	clone_create_probe(pe_resource_t rsc, pe_node_t node)
	{
	CRM_ASSERT(rsc);

	rsc->children = g_list_sort(rsc->children, pcmk__cmp_instance_number);
	if (rsc->children == NULL) {
	pe_warn("Clone %s has no children", rsc->id);
	return false;
	}

	if (rsc->exclusive_discover) {
	pe_node_t *allowed = g_hash_table_lookup(rsc->allowed_nodes, node->details->id);
	if (allowed && allowed->rsc_discover_mode != pe_discover_exclusive) {
	/* exclusive discover is enabled and this node is not marked
	* as a node this resource should be discovered on
	*
	* remove the node from allowed_nodes so that the
	* notification contains only nodes that we might ever run
	* on
	*/
	g_hash_table_remove(rsc->allowed_nodes, node->details->id);

	/* Bit of a shortcut - might as well take it */
	return false;
	}
	}

	if (pcmk_is_set(rsc->flags, pe_rsc_unique)) {
	return pcmk__probe_resource_list(rsc->children, node);
	} else {
	return probe_anonymous_clone(rsc, node, rsc->cluster);
	}
	}

	void
	clone_append_meta(pe_resource_t * rsc, xmlNode * xml)
	{
	char *name = NULL;
	clone_variant_data_t *clone_data = NULL;

	get_clone_variant_data(clone_data, rsc);

	name = crm_meta_name(XML_RSC_ATTR_UNIQUE);
	crm_xml_add(xml, name, pe__rsc_bool_str(rsc, pe_rsc_unique));
	free(name);

	name = crm_meta_name(XML_RSC_ATTR_NOTIFY);
	crm_xml_add(xml, name, pe__rsc_bool_str(rsc, pe_rsc_notify));
	free(name);

	name = crm_meta_name(XML_RSC_ATTR_INCARNATION_MAX);
	crm_xml_add_int(xml, name, clone_data->clone_max);
	free(name);

	name = crm_meta_name(XML_RSC_ATTR_INCARNATION_NODEMAX);
	crm_xml_add_int(xml, name, clone_data->clone_node_max);
	free(name);

	if (pcmk_is_set(rsc->flags, pe_rsc_promotable)) {
	int promoted_max = pe__clone_promoted_max(rsc);
	int promoted_node_max = pe__clone_promoted_node_max(rsc);

	name = crm_meta_name(XML_RSC_ATTR_PROMOTED_MAX);
	crm_xml_add_int(xml, name, promoted_max);
	free(name);

	name = crm_meta_name(XML_RSC_ATTR_PROMOTED_NODEMAX);
	crm_xml_add_int(xml, name, promoted_node_max);
	free(name);

	/* @COMPAT Maintain backward compatibility with resource agents that
	* expect the old names (deprecated since 2.0.0).
	*/
	name = crm_meta_name(PCMK_XA_PROMOTED_MAX_LEGACY);
	crm_xml_add_int(xml, name, promoted_max);
	free(name);

	name = crm_meta_name(PCMK_XA_PROMOTED_NODE_MAX_LEGACY);
	crm_xml_add_int(xml, name, promoted_node_max);
	free(name);
	}
	}

	// Clone implementation of resource_alloc_functions_t:add_utilization()
	void
	pcmk__clone_add_utilization(const pe_resource_t *rsc,
	const pe_resource_t orig_rsc, GList all_rscs,
	GHashTable *utilization)
	{
	bool existing = false;
	pe_resource_t *child = NULL;

	if (!pcmk_is_set(rsc->flags, pe_rsc_provisional)) {
	return;
	}

	// Look for any child already existing in the list
	for (GList *iter = rsc->children; iter != NULL; iter = iter->next) {
	child = (pe_resource_t *) iter->data;
	if (g_list_find(all_rscs, child)) {
	existing = true; // Keep checking remaining children
	} else {
	// If this is a clone of a group, look for group's members
	for (GList *member_iter = child->children; member_iter != NULL;
	member_iter = member_iter->next) {

	pe_resource_t member = (pe_resource_t ) member_iter->data;

	if (g_list_find(all_rscs, member) != NULL) {
	// Add child's utilization, not group member's
	child->cmds->add_utilization(child, orig_rsc, all_rscs,
	utilization);
	existing = true;
	break;
	}
	}
	}
	}

	if (!existing && (rsc->children != NULL)) {
	// If nothing was found, still add first child's utilization
	child = (pe_resource_t *) rsc->children->data;

	child->cmds->add_utilization(child, orig_rsc, all_rscs, utilization);
	}
	}

	// Clone implementation of resource_alloc_functions_t:shutdown_lock()
	void
	pcmk__clone_shutdown_lock(pe_resource_t *rsc)
	{
	return; // Clones currently don't support shutdown locks
	}

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