unpack.c

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/*
 * Copyright 2004-2023 the Pacemaker project contributors
 *
 * The version control history for this file may have further details.
 *
 * This source code is licensed under the GNU Lesser General Public License
 * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
 */

#include <crm_internal.h>

#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <time.h>

#include <crm/crm.h>
#include <crm/services.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/xml_internal.h>

#include <crm/common/util.h>
#include <crm/pengine/rules.h>
#include <crm/pengine/internal.h>
#include <pe_status_private.h>

CRM_TRACE_INIT_DATA(pe_status);

// A (parsed) resource action history entry
struct action_history {
    pcmk_resource_t *rsc;       // Resource that history is for
    pcmk_node_t *node;        // Node that history is for
    xmlNode *xml;             // History entry XML

    // Parsed from entry XML
    const char *id;           // XML ID of history entry
    const char *key;          // Operation key of action
    const char *task;         // Action name
    const char *exit_reason;  // Exit reason given for result
    guint interval_ms;        // Action interval
    int call_id;              // Call ID of action
    int expected_exit_status; // Expected exit status of action
    int exit_status;          // Actual exit status of action
    int execution_status;     // Execution status of action
};

/* This uses pcmk__set_flags_as()/pcmk__clear_flags_as() directly rather than
 * use pe__set_working_set_flags()/pe__clear_working_set_flags() so that the
 * flag is stringified more readably in log messages.
 */
#define set_config_flag(scheduler, option, flag) do {                         \
        const char *scf_value = pe_pref((scheduler)->config_hash, (option));  \
        if (scf_value != NULL) {                                              \
            if (crm_is_true(scf_value)) {                                     \
                (scheduler)->flags = pcmk__set_flags_as(__func__, __LINE__,   \
                                    LOG_TRACE, "Scheduler",                   \
                                    crm_system_name, (scheduler)->flags,      \
                                    (flag), #flag);                           \
            } else {                                                          \
                (scheduler)->flags = pcmk__clear_flags_as(__func__, __LINE__, \
                                    LOG_TRACE, "Scheduler",                   \
                                    crm_system_name, (scheduler)->flags,      \
                                    (flag), #flag);                           \
            }                                                                 \
        }                                                                     \
    } while(0)

static void unpack_rsc_op(pcmk_resource_t *rsc, pcmk_node_t *node,
                          xmlNode *xml_op, xmlNode **last_failure,
                          enum action_fail_response *failed);
static void determine_remote_online_status(pcmk_scheduler_t *scheduler,
                                           pcmk_node_t *this_node);
static void add_node_attrs(const xmlNode *xml_obj, pcmk_node_t *node,
                           bool overwrite, pcmk_scheduler_t *scheduler);
static void determine_online_status(const xmlNode *node_state,
                                    pcmk_node_t *this_node,
                                    pcmk_scheduler_t *scheduler);

static void unpack_node_lrm(pcmk_node_t *node, const xmlNode *xml,
                            pcmk_scheduler_t *scheduler);


static gboolean
is_dangling_guest_node(pcmk_node_t *node)
{
    /* we are looking for a remote-node that was supposed to be mapped to a
     * container resource, but all traces of that container have disappeared 
     * from both the config and the status section. */
    if (pe__is_guest_or_remote_node(node) &&
        node->details->remote_rsc &&
        node->details->remote_rsc->container == NULL &&
        pcmk_is_set(node->details->remote_rsc->flags,
                    pcmk_rsc_removed_filler)) {
        return TRUE;
    }

    return FALSE;
}

void
pe_fence_node(pcmk_scheduler_t *scheduler, pcmk_node_t *node,
              const char *reason, bool priority_delay)
{
    CRM_CHECK(node, return);

    /* A guest node is fenced by marking its container as failed */
    if (pe__is_guest_node(node)) {
        pcmk_resource_t *rsc = node->details->remote_rsc->container;

        if (!pcmk_is_set(rsc->flags, pcmk_rsc_failed)) {
            if (!pcmk_is_set(rsc->flags, pcmk_rsc_managed)) {
                crm_notice("Not fencing guest node %s "
                           "(otherwise would because %s): "
                           "its guest resource %s is unmanaged",
                           pe__node_name(node), reason, rsc->id);
            } else {
                crm_warn("Guest node %s will be fenced "
                         "(by recovering its guest resource %s): %s",
                         pe__node_name(node), rsc->id, reason);

                /* We don't mark the node as unclean because that would prevent the
                 * node from running resources. We want to allow it to run resources
                 * in this transition if the recovery succeeds.
                 */
                node->details->remote_requires_reset = TRUE;
                pe__set_resource_flags(rsc,
                                       pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            }
        }

    } else if (is_dangling_guest_node(node)) {
        crm_info("Cleaning up dangling connection for guest node %s: "
                 "fencing was already done because %s, "
                 "and guest resource no longer exists",
                 pe__node_name(node), reason);
        pe__set_resource_flags(node->details->remote_rsc,
                               pcmk_rsc_failed|pcmk_rsc_stop_if_failed);

    } else if (pe__is_remote_node(node)) {
        pcmk_resource_t *rsc = node->details->remote_rsc;

        if ((rsc != NULL) && !pcmk_is_set(rsc->flags, pcmk_rsc_managed)) {
            crm_notice("Not fencing remote node %s "
                       "(otherwise would because %s): connection is unmanaged",
                       pe__node_name(node), reason);
        } else if(node->details->remote_requires_reset == FALSE) {
            node->details->remote_requires_reset = TRUE;
            crm_warn("Remote node %s %s: %s",
                     pe__node_name(node),
                     pe_can_fence(scheduler, node)? "will be fenced" : "is unclean",
                     reason);
        }
        node->details->unclean = TRUE;
        // No need to apply `priority-fencing-delay` for remote nodes
        pe_fence_op(node, NULL, TRUE, reason, FALSE, scheduler);

    } else if (node->details->unclean) {
        crm_trace("Cluster node %s %s because %s",
                  pe__node_name(node),
                  pe_can_fence(scheduler, node)? "would also be fenced" : "also is unclean",
                  reason);

    } else {
        crm_warn("Cluster node %s %s: %s",
                 pe__node_name(node),
                 pe_can_fence(scheduler, node)? "will be fenced" : "is unclean",
                 reason);
        node->details->unclean = TRUE;
        pe_fence_op(node, NULL, TRUE, reason, priority_delay, scheduler);
    }
}

// @TODO xpaths can't handle templates, rules, or id-refs

// nvpair with provides or requires set to unfencing
#define XPATH_UNFENCING_NVPAIR XML_CIB_TAG_NVPAIR                \
    "[(@" XML_NVPAIR_ATTR_NAME "='" PCMK_STONITH_PROVIDES "'"    \
    "or @" XML_NVPAIR_ATTR_NAME "='" XML_RSC_ATTR_REQUIRES "') " \
    "and @" XML_NVPAIR_ATTR_VALUE "='" PCMK__VALUE_UNFENCING "']"

// unfencing in rsc_defaults or any resource
#define XPATH_ENABLE_UNFENCING \
    "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION "/" XML_CIB_TAG_RESOURCES   \
    "//" XML_TAG_META_SETS "/" XPATH_UNFENCING_NVPAIR                                               \
    "|/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION "/" XML_CIB_TAG_RSCCONFIG  \
    "/" XML_TAG_META_SETS "/" XPATH_UNFENCING_NVPAIR

static void
set_if_xpath(uint64_t flag, const char *xpath, pcmk_scheduler_t *scheduler)
{
    xmlXPathObjectPtr result = NULL;

    if (!pcmk_is_set(scheduler->flags, flag)) {
        result = xpath_search(scheduler->input, xpath);
        if (result && (numXpathResults(result) > 0)) {
            pe__set_working_set_flags(scheduler, flag);
        }
        freeXpathObject(result);
    }
}

gboolean
unpack_config(xmlNode *config, pcmk_scheduler_t *scheduler)
{
    const char *value = NULL;
    GHashTable *config_hash = pcmk__strkey_table(free, free);

    pe_rule_eval_data_t rule_data = {
        .node_hash = NULL,
        .role = pcmk_role_unknown,
        .now = scheduler->now,
        .match_data = NULL,
        .rsc_data = NULL,
        .op_data = NULL
    };

    scheduler->config_hash = config_hash;

    pe__unpack_dataset_nvpairs(config, XML_CIB_TAG_PROPSET, &rule_data, config_hash,
                               CIB_OPTIONS_FIRST, FALSE, scheduler);

    verify_pe_options(scheduler->config_hash);

    set_config_flag(scheduler, "enable-startup-probes",
                    pcmk_sched_probe_resources);
    if (!pcmk_is_set(scheduler->flags, pcmk_sched_probe_resources)) {
        crm_info("Startup probes: disabled (dangerous)");
    }

    value = pe_pref(scheduler->config_hash, XML_ATTR_HAVE_WATCHDOG);
    if (value && crm_is_true(value)) {
        crm_info("Watchdog-based self-fencing will be performed via SBD if "
                 "fencing is required and stonith-watchdog-timeout is nonzero");
        pe__set_working_set_flags(scheduler, pcmk_sched_have_fencing);
    }

    /* Set certain flags via xpath here, so they can be used before the relevant
     * configuration sections are unpacked.
     */
    set_if_xpath(pcmk_sched_enable_unfencing, XPATH_ENABLE_UNFENCING,
                 scheduler);

    value = pe_pref(scheduler->config_hash, "stonith-timeout");
    scheduler->stonith_timeout = (int) crm_parse_interval_spec(value);
    crm_debug("STONITH timeout: %d", scheduler->stonith_timeout);

    set_config_flag(scheduler, "stonith-enabled", pcmk_sched_fencing_enabled);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
        crm_debug("STONITH of failed nodes is enabled");
    } else {
        crm_debug("STONITH of failed nodes is disabled");
    }

    scheduler->stonith_action = pe_pref(scheduler->config_hash,
                                        "stonith-action");
    if (!strcmp(scheduler->stonith_action, "poweroff")) {
        pe_warn_once(pcmk__wo_poweroff,
                     "Support for stonith-action of 'poweroff' is deprecated "
                     "and will be removed in a future release (use 'off' instead)");
        scheduler->stonith_action = PCMK_ACTION_OFF;
    }
    crm_trace("STONITH will %s nodes", scheduler->stonith_action);

    set_config_flag(scheduler, "concurrent-fencing",
                    pcmk_sched_concurrent_fencing);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_concurrent_fencing)) {
        crm_debug("Concurrent fencing is enabled");
    } else {
        crm_debug("Concurrent fencing is disabled");
    }

    value = pe_pref(scheduler->config_hash,
                    XML_CONFIG_ATTR_PRIORITY_FENCING_DELAY);
    if (value) {
        scheduler->priority_fencing_delay = crm_parse_interval_spec(value)
                                            / 1000;
        crm_trace("Priority fencing delay is %ds",
                  scheduler->priority_fencing_delay);
    }

    set_config_flag(scheduler, "stop-all-resources", pcmk_sched_stop_all);
    crm_debug("Stop all active resources: %s",
              pcmk__btoa(pcmk_is_set(scheduler->flags, pcmk_sched_stop_all)));

    set_config_flag(scheduler, "symmetric-cluster",
                    pcmk_sched_symmetric_cluster);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_symmetric_cluster)) {
        crm_debug("Cluster is symmetric" " - resources can run anywhere by default");
    }

    value = pe_pref(scheduler->config_hash, "no-quorum-policy");

    if (pcmk__str_eq(value, "ignore", pcmk__str_casei)) {
        scheduler->no_quorum_policy = pcmk_no_quorum_ignore;

    } else if (pcmk__str_eq(value, "freeze", pcmk__str_casei)) {
        scheduler->no_quorum_policy = pcmk_no_quorum_freeze;

    } else if (pcmk__str_eq(value, "demote", pcmk__str_casei)) {
        scheduler->no_quorum_policy = pcmk_no_quorum_demote;

    } else if (pcmk__str_eq(value, "suicide", pcmk__str_casei)) {
        if (pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
            int do_panic = 0;

            crm_element_value_int(scheduler->input, XML_ATTR_QUORUM_PANIC,
                                  &do_panic);
            if (do_panic || pcmk_is_set(scheduler->flags, pcmk_sched_quorate)) {
                scheduler->no_quorum_policy = pcmk_no_quorum_fence;
            } else {
                crm_notice("Resetting no-quorum-policy to 'stop': cluster has never had quorum");
                scheduler->no_quorum_policy = pcmk_no_quorum_stop;
            }
        } else {
            pcmk__config_err("Resetting no-quorum-policy to 'stop' because "
                             "fencing is disabled");
            scheduler->no_quorum_policy = pcmk_no_quorum_stop;
        }

    } else {
        scheduler->no_quorum_policy = pcmk_no_quorum_stop;
    }

    switch (scheduler->no_quorum_policy) {
        case pcmk_no_quorum_freeze:
            crm_debug("On loss of quorum: Freeze resources");
            break;
        case pcmk_no_quorum_stop:
            crm_debug("On loss of quorum: Stop ALL resources");
            break;
        case pcmk_no_quorum_demote:
            crm_debug("On loss of quorum: "
                      "Demote promotable resources and stop other resources");
            break;
        case pcmk_no_quorum_fence:
            crm_notice("On loss of quorum: Fence all remaining nodes");
            break;
        case pcmk_no_quorum_ignore:
            crm_notice("On loss of quorum: Ignore");
            break;
    }

    set_config_flag(scheduler, "stop-orphan-resources",
                    pcmk_sched_stop_removed_resources);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_stop_removed_resources)) {
        crm_trace("Orphan resources are stopped");
    } else {
        crm_trace("Orphan resources are ignored");
    }

    set_config_flag(scheduler, "stop-orphan-actions",
                    pcmk_sched_cancel_removed_actions);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_cancel_removed_actions)) {
        crm_trace("Orphan resource actions are stopped");
    } else {
        crm_trace("Orphan resource actions are ignored");
    }

    value = pe_pref(scheduler->config_hash, "remove-after-stop");
    if (value != NULL) {
        if (crm_is_true(value)) {
            pe__set_working_set_flags(scheduler, pcmk_sched_remove_after_stop);
#ifndef PCMK__COMPAT_2_0
            pe_warn_once(pcmk__wo_remove_after,
                         "Support for the remove-after-stop cluster property is"
                         " deprecated and will be removed in a future release");
#endif
        } else {
            pe__clear_working_set_flags(scheduler,
                                        pcmk_sched_remove_after_stop);
        }
    }

    set_config_flag(scheduler, "maintenance-mode", pcmk_sched_in_maintenance);
    crm_trace("Maintenance mode: %s",
              pcmk__btoa(pcmk_is_set(scheduler->flags,
                                     pcmk_sched_in_maintenance)));

    set_config_flag(scheduler, "start-failure-is-fatal",
                    pcmk_sched_start_failure_fatal);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_start_failure_fatal)) {
        crm_trace("Start failures are always fatal");
    } else {
        crm_trace("Start failures are handled by failcount");
    }

    if (pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
        set_config_flag(scheduler, "startup-fencing",
                        pcmk_sched_startup_fencing);
    }
    if (pcmk_is_set(scheduler->flags, pcmk_sched_startup_fencing)) {
        crm_trace("Unseen nodes will be fenced");
    } else {
        pe_warn_once(pcmk__wo_blind, "Blind faith: not fencing unseen nodes");
    }

    pe__unpack_node_health_scores(scheduler);

    scheduler->placement_strategy = pe_pref(scheduler->config_hash,
                                            "placement-strategy");
    crm_trace("Placement strategy: %s", scheduler->placement_strategy);

    set_config_flag(scheduler, "shutdown-lock", pcmk_sched_shutdown_lock);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_shutdown_lock)) {
        value = pe_pref(scheduler->config_hash,
                        XML_CONFIG_ATTR_SHUTDOWN_LOCK_LIMIT);
        scheduler->shutdown_lock = crm_parse_interval_spec(value) / 1000;
        crm_trace("Resources will be locked to nodes that were cleanly "
                  "shut down (locks expire after %s)",
                  pcmk__readable_interval(scheduler->shutdown_lock));
    } else {
        crm_trace("Resources will not be locked to nodes that were cleanly "
                  "shut down");
    }

    value = pe_pref(scheduler->config_hash,
                    XML_CONFIG_ATTR_NODE_PENDING_TIMEOUT);
    scheduler->node_pending_timeout = crm_parse_interval_spec(value) / 1000;
    if (scheduler->node_pending_timeout == 0) {
        crm_trace("Do not fence pending nodes");
    } else {
        crm_trace("Fence pending nodes after %s",
                  pcmk__readable_interval(scheduler->node_pending_timeout
                                          * 1000));
    }

    return TRUE;
}

pcmk_node_t *
pe_create_node(const char *id, const char *uname, const char *type,
               const char *score, pcmk_scheduler_t *scheduler)
{
    pcmk_node_t *new_node = NULL;

    if (pe_find_node(scheduler->nodes, uname) != NULL) {
        pcmk__config_warn("More than one node entry has name '%s'", uname);
    }

    new_node = calloc(1, sizeof(pcmk_node_t));
    if (new_node == NULL) {
        return NULL;
    }

    new_node->weight = char2score(score);
    new_node->details = calloc(1, sizeof(struct pe_node_shared_s));

    if (new_node->details == NULL) {
        free(new_node);
        return NULL;
    }

    crm_trace("Creating node for entry %s/%s", uname, id);
    new_node->details->id = id;
    new_node->details->uname = uname;
    new_node->details->online = FALSE;
    new_node->details->shutdown = FALSE;
    new_node->details->rsc_discovery_enabled = TRUE;
    new_node->details->running_rsc = NULL;
    new_node->details->data_set = scheduler;

    if (pcmk__str_eq(type, "member", pcmk__str_null_matches | pcmk__str_casei)) {
        new_node->details->type = pcmk_node_variant_cluster;

    } else if (pcmk__str_eq(type, "remote", pcmk__str_casei)) {
        new_node->details->type = pcmk_node_variant_remote;
        pe__set_working_set_flags(scheduler, pcmk_sched_have_remote_nodes);

    } else {
        /* @COMPAT 'ping' is the default for backward compatibility, but it
         * should be changed to 'member' at a compatibility break
         */
        if (!pcmk__str_eq(type, "ping", pcmk__str_casei)) {
            pcmk__config_warn("Node %s has unrecognized type '%s', "
                              "assuming 'ping'", pcmk__s(uname, "without name"),
                              type);
        }
        pe_warn_once(pcmk__wo_ping_node,
                     "Support for nodes of type 'ping' (such as %s) is "
                     "deprecated and will be removed in a future release",
                     pcmk__s(uname, "unnamed node"));
        new_node->details->type = node_ping;
    }

    new_node->details->attrs = pcmk__strkey_table(free, free);

    if (pe__is_guest_or_remote_node(new_node)) {
        g_hash_table_insert(new_node->details->attrs, strdup(CRM_ATTR_KIND),
                            strdup("remote"));
    } else {
        g_hash_table_insert(new_node->details->attrs, strdup(CRM_ATTR_KIND),
                            strdup("cluster"));
    }

    new_node->details->utilization = pcmk__strkey_table(free, free);
    new_node->details->digest_cache = pcmk__strkey_table(free,
                                                          pe__free_digests);

    scheduler->nodes = g_list_insert_sorted(scheduler->nodes, new_node,
                                            pe__cmp_node_name);
    return new_node;
}

static const char *
expand_remote_rsc_meta(xmlNode *xml_obj, xmlNode *parent, pcmk_scheduler_t *data)
{
    xmlNode *attr_set = NULL;
    xmlNode *attr = NULL;

    const char *container_id = ID(xml_obj);
    const char *remote_name = NULL;
    const char *remote_server = NULL;
    const char *remote_port = NULL;
    const char *connect_timeout = "60s";
    const char *remote_allow_migrate=NULL;
    const char *is_managed = NULL;

    for (attr_set = pcmk__xe_first_child(xml_obj); attr_set != NULL;
         attr_set = pcmk__xe_next(attr_set)) {

        if (!pcmk__str_eq((const char *)attr_set->name, XML_TAG_META_SETS,
                          pcmk__str_casei)) {
            continue;
        }

        for (attr = pcmk__xe_first_child(attr_set); attr != NULL;
             attr = pcmk__xe_next(attr)) {
            const char *value = crm_element_value(attr, XML_NVPAIR_ATTR_VALUE);
            const char *name = crm_element_value(attr, XML_NVPAIR_ATTR_NAME);

            if (pcmk__str_eq(name, XML_RSC_ATTR_REMOTE_NODE, pcmk__str_casei)) {
                remote_name = value;
            } else if (pcmk__str_eq(name, "remote-addr", pcmk__str_casei)) {
                remote_server = value;
            } else if (pcmk__str_eq(name, "remote-port", pcmk__str_casei)) {
                remote_port = value;
            } else if (pcmk__str_eq(name, "remote-connect-timeout", pcmk__str_casei)) {
                connect_timeout = value;
            } else if (pcmk__str_eq(name, "remote-allow-migrate", pcmk__str_casei)) {
                remote_allow_migrate=value;
            } else if (pcmk__str_eq(name, XML_RSC_ATTR_MANAGED, pcmk__str_casei)) {
                is_managed = value;
            }
        }
    }

    if (remote_name == NULL) {
        return NULL;
    }

    if (pe_find_resource(data->resources, remote_name) != NULL) {
        return NULL;
    }

    pe_create_remote_xml(parent, remote_name, container_id,
                         remote_allow_migrate, is_managed,
                         connect_timeout, remote_server, remote_port);
    return remote_name;
}

static void
handle_startup_fencing(pcmk_scheduler_t *scheduler, pcmk_node_t *new_node)
{
    if ((new_node->details->type == pcmk_node_variant_remote)
        && (new_node->details->remote_rsc == NULL)) {
        /* Ignore fencing for remote nodes that don't have a connection resource
         * associated with them. This happens when remote node entries get left
         * in the nodes section after the connection resource is removed.
         */
        return;
    }

    if (pcmk_is_set(scheduler->flags, pcmk_sched_startup_fencing)) {
        // All nodes are unclean until we've seen their status entry
        new_node->details->unclean = TRUE;

    } else {
        // Blind faith ...
        new_node->details->unclean = FALSE;
    }

    /* We need to be able to determine if a node's status section
     * exists or not separate from whether the node is unclean. */
    new_node->details->unseen = TRUE;
}

gboolean
unpack_nodes(xmlNode *xml_nodes, pcmk_scheduler_t *scheduler)
{
    xmlNode *xml_obj = NULL;
    pcmk_node_t *new_node = NULL;
    const char *id = NULL;
    const char *uname = NULL;
    const char *type = NULL;
    const char *score = NULL;

    for (xml_obj = pcmk__xe_first_child(xml_nodes); xml_obj != NULL;
         xml_obj = pcmk__xe_next(xml_obj)) {

        if (pcmk__str_eq((const char *)xml_obj->name, XML_CIB_TAG_NODE, pcmk__str_none)) {
            new_node = NULL;

            id = crm_element_value(xml_obj, XML_ATTR_ID);
            uname = crm_element_value(xml_obj, XML_ATTR_UNAME);
            type = crm_element_value(xml_obj, XML_ATTR_TYPE);
            score = crm_element_value(xml_obj, XML_RULE_ATTR_SCORE);
            crm_trace("Processing node %s/%s", uname, id);

            if (id == NULL) {
                pcmk__config_err("Ignoring <" XML_CIB_TAG_NODE
                                 "> entry in configuration without id");
                continue;
            }
            new_node = pe_create_node(id, uname, type, score, scheduler);

            if (new_node == NULL) {
                return FALSE;
            }

            handle_startup_fencing(scheduler, new_node);

            add_node_attrs(xml_obj, new_node, FALSE, scheduler);

            crm_trace("Done with node %s", crm_element_value(xml_obj, XML_ATTR_UNAME));
        }
    }

    if (scheduler->localhost
        && (pe_find_node(scheduler->nodes, scheduler->localhost) == NULL)) {
        crm_info("Creating a fake local node");
        pe_create_node(scheduler->localhost, scheduler->localhost, NULL, 0,
                       scheduler);
    }

    return TRUE;
}

static void
setup_container(pcmk_resource_t *rsc, pcmk_scheduler_t *scheduler)
{
    const char *container_id = NULL;

    if (rsc->children) {
        g_list_foreach(rsc->children, (GFunc) setup_container, scheduler);
        return;
    }

    container_id = g_hash_table_lookup(rsc->meta, XML_RSC_ATTR_CONTAINER);
    if (container_id && !pcmk__str_eq(container_id, rsc->id, pcmk__str_casei)) {
        pcmk_resource_t *container = pe_find_resource(scheduler->resources,
                                                      container_id);

        if (container) {
            rsc->container = container;
            pe__set_resource_flags(container, pcmk_rsc_has_filler);
            container->fillers = g_list_append(container->fillers, rsc);
            pe_rsc_trace(rsc, "Resource %s's container is %s", rsc->id, container_id);
        } else {
            pe_err("Resource %s: Unknown resource container (%s)", rsc->id, container_id);
        }
    }
}

gboolean
unpack_remote_nodes(xmlNode *xml_resources, pcmk_scheduler_t *scheduler)
{
    xmlNode *xml_obj = NULL;

    /* Create remote nodes and guest nodes from the resource configuration
     * before unpacking resources.
     */
    for (xml_obj = pcmk__xe_first_child(xml_resources); xml_obj != NULL;
         xml_obj = pcmk__xe_next(xml_obj)) {

        const char *new_node_id = NULL;

        /* Check for remote nodes, which are defined by ocf:pacemaker:remote
         * primitives.
         */
        if (xml_contains_remote_node(xml_obj)) {
            new_node_id = ID(xml_obj);
            /* The "pe_find_node" check is here to make sure we don't iterate over
             * an expanded node that has already been added to the node list. */
            if (new_node_id
                && (pe_find_node(scheduler->nodes, new_node_id) == NULL)) {
                crm_trace("Found remote node %s defined by resource %s",
                          new_node_id, ID(xml_obj));
                pe_create_node(new_node_id, new_node_id, "remote", NULL,
                               scheduler);
            }
            continue;
        }

        /* Check for guest nodes, which are defined by special meta-attributes
         * of a primitive of any type (for example, VirtualDomain or Xen).
         */
        if (pcmk__str_eq((const char *)xml_obj->name, XML_CIB_TAG_RESOURCE, pcmk__str_none)) {
            /* This will add an ocf:pacemaker:remote primitive to the
             * configuration for the guest node's connection, to be unpacked
             * later.
             */
            new_node_id = expand_remote_rsc_meta(xml_obj, xml_resources,
                                                 scheduler);
            if (new_node_id
                && (pe_find_node(scheduler->nodes, new_node_id) == NULL)) {
                crm_trace("Found guest node %s in resource %s",
                          new_node_id, ID(xml_obj));
                pe_create_node(new_node_id, new_node_id, "remote", NULL,
                               scheduler);
            }
            continue;
        }

        /* Check for guest nodes inside a group. Clones are currently not
         * supported as guest nodes.
         */
        if (pcmk__str_eq((const char *)xml_obj->name, XML_CIB_TAG_GROUP, pcmk__str_none)) {
            xmlNode *xml_obj2 = NULL;
            for (xml_obj2 = pcmk__xe_first_child(xml_obj); xml_obj2 != NULL;
                 xml_obj2 = pcmk__xe_next(xml_obj2)) {

                new_node_id = expand_remote_rsc_meta(xml_obj2, xml_resources,
                                                     scheduler);

                if (new_node_id
                    && (pe_find_node(scheduler->nodes, new_node_id) == NULL)) {
                    crm_trace("Found guest node %s in resource %s inside group %s",
                              new_node_id, ID(xml_obj2), ID(xml_obj));
                    pe_create_node(new_node_id, new_node_id, "remote", NULL,
                                   scheduler);
                }
            }
        }
    }
    return TRUE;
}

/* Call this after all the nodes and resources have been
 * unpacked, but before the status section is read.
 *
 * A remote node's online status is reflected by the state
 * of the remote node's connection resource. We need to link
 * the remote node to this connection resource so we can have
 * easy access to the connection resource during the scheduler calculations.
 */
static void
link_rsc2remotenode(pcmk_scheduler_t *scheduler, pcmk_resource_t *new_rsc)
{
    pcmk_node_t *remote_node = NULL;

    if (new_rsc->is_remote_node == FALSE) {
        return;
    }

    if (pcmk_is_set(scheduler->flags, pcmk_sched_location_only)) {
        /* remote_nodes and remote_resources are not linked in quick location calculations */
        return;
    }

    remote_node = pe_find_node(scheduler->nodes, new_rsc->id);
    CRM_CHECK(remote_node != NULL, return);

    pe_rsc_trace(new_rsc, "Linking remote connection resource %s to %s",
                 new_rsc->id, pe__node_name(remote_node));
    remote_node->details->remote_rsc = new_rsc;

    if (new_rsc->container == NULL) {
        /* Handle start-up fencing for remote nodes (as opposed to guest nodes)
         * the same as is done for cluster nodes.
         */
        handle_startup_fencing(scheduler, remote_node);

    } else {
        /* pe_create_node() marks the new node as "remote" or "cluster"; now
         * that we know the node is a guest node, update it correctly.
         */
        g_hash_table_replace(remote_node->details->attrs, strdup(CRM_ATTR_KIND),
                             strdup("container"));
    }
}

static void
destroy_tag(gpointer data)
{
    pcmk_tag_t *tag = data;

    if (tag) {
        free(tag->id);
        g_list_free_full(tag->refs, free);
        free(tag);
    }
}

gboolean
unpack_resources(const xmlNode *xml_resources, pcmk_scheduler_t *scheduler)
{
    xmlNode *xml_obj = NULL;
    GList *gIter = NULL;

    scheduler->template_rsc_sets = pcmk__strkey_table(free, destroy_tag);

    for (xml_obj = pcmk__xe_first_child(xml_resources); xml_obj != NULL;
         xml_obj = pcmk__xe_next(xml_obj)) {

        pcmk_resource_t *new_rsc = NULL;
        const char *id = ID(xml_obj);

        if (pcmk__str_empty(id)) {
            pcmk__config_err("Ignoring <%s> resource without ID",
                             xml_obj->name);
            continue;
        }

        if (pcmk__str_eq((const char *) xml_obj->name, XML_CIB_TAG_RSC_TEMPLATE,
                         pcmk__str_none)) {
            if (g_hash_table_lookup_extended(scheduler->template_rsc_sets, id,
                                             NULL, NULL) == FALSE) {
                /* Record the template's ID for the knowledge of its existence anyway. */
                g_hash_table_insert(scheduler->template_rsc_sets, strdup(id),
                                    NULL);
            }
            continue;
        }

        crm_trace("Unpacking <%s " XML_ATTR_ID "='%s'>",
                  xml_obj->name, id);
        if (pe__unpack_resource(xml_obj, &new_rsc, NULL,
                                scheduler) == pcmk_rc_ok) {
            scheduler->resources = g_list_append(scheduler->resources, new_rsc);
            pe_rsc_trace(new_rsc, "Added resource %s", new_rsc->id);

        } else {
            pcmk__config_err("Ignoring <%s> resource '%s' "
                             "because configuration is invalid",
                             xml_obj->name, id);
        }
    }

    for (gIter = scheduler->resources; gIter != NULL; gIter = gIter->next) {
        pcmk_resource_t *rsc = (pcmk_resource_t *) gIter->data;

        setup_container(rsc, scheduler);
        link_rsc2remotenode(scheduler, rsc);
    }

    scheduler->resources = g_list_sort(scheduler->resources,
                                      pe__cmp_rsc_priority);
    if (pcmk_is_set(scheduler->flags, pcmk_sched_location_only)) {
        /* Ignore */

    } else if (pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)
               && !pcmk_is_set(scheduler->flags, pcmk_sched_have_fencing)) {

        pcmk__config_err("Resource start-up disabled since no STONITH resources have been defined");
        pcmk__config_err("Either configure some or disable STONITH with the stonith-enabled option");
        pcmk__config_err("NOTE: Clusters with shared data need STONITH to ensure data integrity");
    }

    return TRUE;
}

gboolean
unpack_tags(xmlNode *xml_tags, pcmk_scheduler_t *scheduler)
{
    xmlNode *xml_tag = NULL;

    scheduler->tags = pcmk__strkey_table(free, destroy_tag);

    for (xml_tag = pcmk__xe_first_child(xml_tags); xml_tag != NULL;
         xml_tag = pcmk__xe_next(xml_tag)) {

        xmlNode *xml_obj_ref = NULL;
        const char *tag_id = ID(xml_tag);

        if (!pcmk__str_eq((const char *)xml_tag->name, XML_CIB_TAG_TAG, pcmk__str_none)) {
            continue;
        }

        if (tag_id == NULL) {
            pcmk__config_err("Ignoring <%s> without " XML_ATTR_ID,
                             (const char *) xml_tag->name);
            continue;
        }

        for (xml_obj_ref = pcmk__xe_first_child(xml_tag); xml_obj_ref != NULL;
             xml_obj_ref = pcmk__xe_next(xml_obj_ref)) {

            const char *obj_ref = ID(xml_obj_ref);

            if (!pcmk__str_eq((const char *)xml_obj_ref->name, XML_CIB_TAG_OBJ_REF, pcmk__str_none)) {
                continue;
            }

            if (obj_ref == NULL) {
                pcmk__config_err("Ignoring <%s> for tag '%s' without " XML_ATTR_ID,
                                 xml_obj_ref->name, tag_id);
                continue;
            }

            if (add_tag_ref(scheduler->tags, tag_id, obj_ref) == FALSE) {
                return FALSE;
            }
        }
    }

    return TRUE;
}

/* The ticket state section:
 * "/cib/status/tickets/ticket_state" */
static gboolean
unpack_ticket_state(xmlNode *xml_ticket, pcmk_scheduler_t *scheduler)
{
    const char *ticket_id = NULL;
    const char *granted = NULL;
    const char *last_granted = NULL;
    const char *standby = NULL;
    xmlAttrPtr xIter = NULL;

    pcmk_ticket_t *ticket = NULL;

    ticket_id = ID(xml_ticket);
    if (pcmk__str_empty(ticket_id)) {
        return FALSE;
    }

    crm_trace("Processing ticket state for %s", ticket_id);

    ticket = g_hash_table_lookup(scheduler->tickets, ticket_id);
    if (ticket == NULL) {
        ticket = ticket_new(ticket_id, scheduler);
        if (ticket == NULL) {
            return FALSE;
        }
    }

    for (xIter = xml_ticket->properties; xIter; xIter = xIter->next) {
        const char *prop_name = (const char *)xIter->name;
        const char *prop_value = pcmk__xml_attr_value(xIter);

        if (pcmk__str_eq(prop_name, XML_ATTR_ID, pcmk__str_none)) {
            continue;
        }
        g_hash_table_replace(ticket->state, strdup(prop_name), strdup(prop_value));
    }

    granted = g_hash_table_lookup(ticket->state, "granted");
    if (granted && crm_is_true(granted)) {
        ticket->granted = TRUE;
        crm_info("We have ticket '%s'", ticket->id);
    } else {
        ticket->granted = FALSE;
        crm_info("We do not have ticket '%s'", ticket->id);
    }

    last_granted = g_hash_table_lookup(ticket->state, "last-granted");
    if (last_granted) {
        long long last_granted_ll;

        pcmk__scan_ll(last_granted, &last_granted_ll, 0LL);
        ticket->last_granted = (time_t) last_granted_ll;
    }

    standby = g_hash_table_lookup(ticket->state, "standby");
    if (standby && crm_is_true(standby)) {
        ticket->standby = TRUE;
        if (ticket->granted) {
            crm_info("Granted ticket '%s' is in standby-mode", ticket->id);
        }
    } else {
        ticket->standby = FALSE;
    }

    crm_trace("Done with ticket state for %s", ticket_id);

    return TRUE;
}

static gboolean
unpack_tickets_state(xmlNode *xml_tickets, pcmk_scheduler_t *scheduler)
{
    xmlNode *xml_obj = NULL;

    for (xml_obj = pcmk__xe_first_child(xml_tickets); xml_obj != NULL;
         xml_obj = pcmk__xe_next(xml_obj)) {

        if (!pcmk__str_eq((const char *)xml_obj->name, XML_CIB_TAG_TICKET_STATE, pcmk__str_none)) {
            continue;
        }
        unpack_ticket_state(xml_obj, scheduler);
    }

    return TRUE;
}

static void
unpack_handle_remote_attrs(pcmk_node_t *this_node, const xmlNode *state,
                           pcmk_scheduler_t *scheduler)
{
    const char *resource_discovery_enabled = NULL;
    const xmlNode *attrs = NULL;
    pcmk_resource_t *rsc = NULL;

    if (!pcmk__str_eq((const char *)state->name, XML_CIB_TAG_STATE, pcmk__str_none)) {
        return;
    }

    if ((this_node == NULL) || !pe__is_guest_or_remote_node(this_node)) {
        return;
    }
    crm_trace("Processing Pacemaker Remote node %s", pe__node_name(this_node));

    pcmk__scan_min_int(crm_element_value(state, XML_NODE_IS_MAINTENANCE),
                       &(this_node->details->remote_maintenance), 0);

    rsc = this_node->details->remote_rsc;
    if (this_node->details->remote_requires_reset == FALSE) {
        this_node->details->unclean = FALSE;
        this_node->details->unseen = FALSE;
    }
    attrs = find_xml_node(state, XML_TAG_TRANSIENT_NODEATTRS, FALSE);
    add_node_attrs(attrs, this_node, TRUE, scheduler);

    if (pe__shutdown_requested(this_node)) {
        crm_info("%s is shutting down", pe__node_name(this_node));
        this_node->details->shutdown = TRUE;
    }
 
    if (crm_is_true(pe_node_attribute_raw(this_node, "standby"))) {
        crm_info("%s is in standby mode", pe__node_name(this_node));
        this_node->details->standby = TRUE;
    }

    if (crm_is_true(pe_node_attribute_raw(this_node, "maintenance")) ||
        ((rsc != NULL) && !pcmk_is_set(rsc->flags, pcmk_rsc_managed))) {
        crm_info("%s is in maintenance mode", pe__node_name(this_node));
        this_node->details->maintenance = TRUE;
    }

    resource_discovery_enabled = pe_node_attribute_raw(this_node, XML_NODE_ATTR_RSC_DISCOVERY);
    if (resource_discovery_enabled && !crm_is_true(resource_discovery_enabled)) {
        if (pe__is_remote_node(this_node)
            && !pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
            crm_warn("Ignoring " XML_NODE_ATTR_RSC_DISCOVERY
                     " attribute on Pacemaker Remote node %s"
                     " because fencing is disabled",
                     pe__node_name(this_node));
        } else {
            /* This is either a remote node with fencing enabled, or a guest
             * node. We don't care whether fencing is enabled when fencing guest
             * nodes, because they are "fenced" by recovering their containing
             * resource.
             */
            crm_info("%s has resource discovery disabled",
                     pe__node_name(this_node));
            this_node->details->rsc_discovery_enabled = FALSE;
        }
    }
}

static void
unpack_transient_attributes(const xmlNode *state, pcmk_node_t *node,
                            pcmk_scheduler_t *scheduler)
{
    const char *discovery = NULL;
    const xmlNode *attrs = find_xml_node(state, XML_TAG_TRANSIENT_NODEATTRS,
                                         FALSE);

    add_node_attrs(attrs, node, TRUE, scheduler);

    if (crm_is_true(pe_node_attribute_raw(node, "standby"))) {
        crm_info("%s is in standby mode", pe__node_name(node));
        node->details->standby = TRUE;
    }

    if (crm_is_true(pe_node_attribute_raw(node, "maintenance"))) {
        crm_info("%s is in maintenance mode", pe__node_name(node));
        node->details->maintenance = TRUE;
    }

    discovery = pe_node_attribute_raw(node, XML_NODE_ATTR_RSC_DISCOVERY);
    if ((discovery != NULL) && !crm_is_true(discovery)) {
        crm_warn("Ignoring " XML_NODE_ATTR_RSC_DISCOVERY
                 " attribute for %s because disabling resource discovery "
                 "is not allowed for cluster nodes", pe__node_name(node));
    }
}

static void
unpack_node_state(const xmlNode *state, pcmk_scheduler_t *scheduler)
{
    const char *id = NULL;
    const char *uname = NULL;
    pcmk_node_t *this_node = NULL;

    id = crm_element_value(state, XML_ATTR_ID);
    if (id == NULL) {
        crm_warn("Ignoring malformed " XML_CIB_TAG_STATE " entry without "
                 XML_ATTR_ID);
        return;
    }

    uname = crm_element_value(state, XML_ATTR_UNAME);
    if (uname == NULL) {
        /* If a joining peer makes the cluster acquire the quorum from corosync
         * meanwhile it has not joined CPG membership of pacemaker-controld yet,
         * it's possible that the created node_state entry doesn't have an uname
         * yet. We should recognize the node as `pending` and wait for it to
         * join CPG.
         */
        crm_trace("Handling " XML_CIB_TAG_STATE " entry with id=\"%s\" without "
                  XML_ATTR_UNAME, id);
    }

    this_node = pe_find_node_any(scheduler->nodes, id, uname);
    if (this_node == NULL) {
        pcmk__config_warn("Ignoring recorded node state for id=\"%s\" (%s) "
                          "because it is no longer in the configuration",
                          id, pcmk__s(uname, "uname unknown"));
        return;
    }

    if (pe__is_guest_or_remote_node(this_node)) {
        /* We can't determine the online status of Pacemaker Remote nodes until
         * after all resource history has been unpacked. In this first pass, we
         * do need to mark whether the node has been fenced, as this plays a
         * role during unpacking cluster node resource state.
         */
        pcmk__scan_min_int(crm_element_value(state, XML_NODE_IS_FENCED),
                           &(this_node->details->remote_was_fenced), 0);
        return;
    }

    unpack_transient_attributes(state, this_node, scheduler);

    /* Provisionally mark this cluster node as clean. We have at least seen it
     * in the current cluster's lifetime.
     */
    this_node->details->unclean = FALSE;
    this_node->details->unseen = FALSE;

    crm_trace("Determining online status of cluster node %s (id %s)",
              pe__node_name(this_node), id);
    determine_online_status(state, this_node, scheduler);

    if (!pcmk_is_set(scheduler->flags, pcmk_sched_quorate)
        && this_node->details->online
        && (scheduler->no_quorum_policy == pcmk_no_quorum_fence)) {
        /* Everything else should flow from this automatically
         * (at least until the scheduler becomes able to migrate off
         * healthy resources)
         */
        pe_fence_node(scheduler, this_node, "cluster does not have quorum",
                      FALSE);
    }
}

static int
unpack_node_history(const xmlNode *status, bool fence,
                    pcmk_scheduler_t *scheduler)
{
    int rc = pcmk_rc_ok;

    // Loop through all node_state entries in CIB status
    for (const xmlNode *state = first_named_child(status, XML_CIB_TAG_STATE);
         state != NULL; state = crm_next_same_xml(state)) {

        const char *id = ID(state);
        const char *uname = crm_element_value(state, XML_ATTR_UNAME);
        pcmk_node_t *this_node = NULL;

        if ((id == NULL) || (uname == NULL)) {
            // Warning already logged in first pass through status section
            crm_trace("Not unpacking resource history from malformed "
                      XML_CIB_TAG_STATE " without id and/or uname");
            continue;
        }

        this_node = pe_find_node_any(scheduler->nodes, id, uname);
        if (this_node == NULL) {
            // Warning already logged in first pass through status section
            crm_trace("Not unpacking resource history for node %s because "
                      "no longer in configuration", id);
            continue;
        }

        if (this_node->details->unpacked) {
            crm_trace("Not unpacking resource history for node %s because "
                      "already unpacked", id);
            continue;
        }

        if (fence) {
            // We're processing all remaining nodes

        } else if (pe__is_guest_node(this_node)) {
            /* We can unpack a guest node's history only after we've unpacked
             * other resource history to the point that we know that the node's
             * connection and containing resource are both up.
             */
            pcmk_resource_t *rsc = this_node->details->remote_rsc;

            if ((rsc == NULL) || (rsc->role != pcmk_role_started)
                || (rsc->container->role != pcmk_role_started)) {
                crm_trace("Not unpacking resource history for guest node %s "
                          "because container and connection are not known to "
                          "be up", id);
                continue;
            }

        } else if (pe__is_remote_node(this_node)) {
            /* We can unpack a remote node's history only after we've unpacked
             * other resource history to the point that we know that the node's
             * connection is up, with the exception of when shutdown locks are
             * in use.
             */
            pcmk_resource_t *rsc = this_node->details->remote_rsc;

            if ((rsc == NULL)
                || (!pcmk_is_set(scheduler->flags, pcmk_sched_shutdown_lock)
                    && (rsc->role != pcmk_role_started))) {
                crm_trace("Not unpacking resource history for remote node %s "
                          "because connection is not known to be up", id);
                continue;
            }

        /* If fencing and shutdown locks are disabled and we're not processing
         * unseen nodes, then we don't want to unpack offline nodes until online
         * nodes have been unpacked. This allows us to number active clone
         * instances first.
         */
        } else if (!pcmk_any_flags_set(scheduler->flags,
                                       pcmk_sched_fencing_enabled
                                       |pcmk_sched_shutdown_lock)
                   && !this_node->details->online) {
            crm_trace("Not unpacking resource history for offline "
                      "cluster node %s", id);
            continue;
        }

        if (pe__is_guest_or_remote_node(this_node)) {
            determine_remote_online_status(scheduler, this_node);
            unpack_handle_remote_attrs(this_node, state, scheduler);
        }

        crm_trace("Unpacking resource history for %snode %s",
                  (fence? "unseen " : ""), id);

        this_node->details->unpacked = TRUE;
        unpack_node_lrm(this_node, state, scheduler);

        rc = EAGAIN; // Other node histories might depend on this one
    }
    return rc;
}

/* remove nodes that are down, stopping */
/* create positive rsc_to_node constraints between resources and the nodes they are running on */
/* anything else? */
gboolean
unpack_status(xmlNode *status, pcmk_scheduler_t *scheduler)
{
    xmlNode *state = NULL;

    crm_trace("Beginning unpack");

    if (scheduler->tickets == NULL) {
        scheduler->tickets = pcmk__strkey_table(free, destroy_ticket);
    }

    for (state = pcmk__xe_first_child(status); state != NULL;
         state = pcmk__xe_next(state)) {

        if (pcmk__str_eq((const char *)state->name, XML_CIB_TAG_TICKETS, pcmk__str_none)) {
            unpack_tickets_state((xmlNode *) state, scheduler);

        } else if (pcmk__str_eq((const char *)state->name, XML_CIB_TAG_STATE, pcmk__str_none)) {
            unpack_node_state(state, scheduler);
        }
    }

    while (unpack_node_history(status, FALSE, scheduler) == EAGAIN) {
        crm_trace("Another pass through node resource histories is needed");
    }

    // Now catch any nodes we didn't see
    unpack_node_history(status,
                        pcmk_is_set(scheduler->flags,
                                    pcmk_sched_fencing_enabled),
                        scheduler);

    /* Now that we know where resources are, we can schedule stops of containers
     * with failed bundle connections
     */
    if (scheduler->stop_needed != NULL) {
        for (GList *item = scheduler->stop_needed; item; item = item->next) {
            pcmk_resource_t *container = item->data;
            pcmk_node_t *node = pe__current_node(container);

            if (node) {
                stop_action(container, node, FALSE);
            }
        }
        g_list_free(scheduler->stop_needed);
        scheduler->stop_needed = NULL;
    }

    /* Now that we know status of all Pacemaker Remote connections and nodes,
     * we can stop connections for node shutdowns, and check the online status
     * of remote/guest nodes that didn't have any node history to unpack.
     */
    for (GList *gIter = scheduler->nodes; gIter != NULL; gIter = gIter->next) {
        pcmk_node_t *this_node = gIter->data;

        if (!pe__is_guest_or_remote_node(this_node)) {
            continue;
        }
        if (this_node->details->shutdown
            && (this_node->details->remote_rsc != NULL)) {
            pe__set_next_role(this_node->details->remote_rsc, pcmk_role_stopped,
                              "remote shutdown");
        }
        if (!this_node->details->unpacked) {
            determine_remote_online_status(scheduler, this_node);
        }
    }

    return TRUE;
}

static long long
unpack_node_member(const xmlNode *node_state, pcmk_scheduler_t *scheduler)
{
    const char *member_time = crm_element_value(node_state, PCMK__XA_IN_CCM);
    int member = 0;

    if (member_time == NULL) {
        return -1LL;

    } else if (crm_str_to_boolean(member_time, &member) == 1) {
        /* If in_ccm=0, we'll return 0 here. If in_ccm=1, either the entry was
         * recorded as a boolean for a DC < 2.1.7, or the node is pending
         * shutdown and has left the CPG, in which case it was set to 1 to avoid
         * fencing for node-pending-timeout.
         *
         * We return the effective time for in_ccm=1 because what's important to
         * avoid fencing is that effective time minus this value is less than
         * the pending node timeout.
         */
        return member? (long long) get_effective_time(scheduler) : 0LL;

    } else {
        long long when_member = 0LL;

        if ((pcmk__scan_ll(member_time, &when_member,
                           0LL) != pcmk_rc_ok) || (when_member < 0LL)) {
            crm_warn("Unrecognized value '%s' for " PCMK__XA_IN_CCM
                     " in " XML_CIB_TAG_STATE " entry", member_time);
            return -1LL;
        }
        return when_member;
    }
}

static long long
unpack_node_online(const xmlNode *node_state)
{
    const char *peer_time = crm_element_value(node_state, PCMK__XA_CRMD);

    // @COMPAT Entries recorded for DCs < 2.1.7 have "online" or "offline"
    if (pcmk__str_eq(peer_time, OFFLINESTATUS,
                     pcmk__str_casei|pcmk__str_null_matches)) {
        return 0LL;

    } else if (pcmk__str_eq(peer_time, ONLINESTATUS, pcmk__str_casei)) {
        return 1LL;

    } else {
        long long when_online = 0LL;

        if ((pcmk__scan_ll(peer_time, &when_online, 0LL) != pcmk_rc_ok)
            || (when_online < 0)) {
            crm_warn("Unrecognized value '%s' for " PCMK__XA_CRMD " in "
                     XML_CIB_TAG_STATE " entry, assuming offline", peer_time);
            return 0LL;
        }
        return when_online;
    }
}

static bool
unpack_node_terminate(const pcmk_node_t *node, const xmlNode *node_state)
{
    long long value = 0LL;
    int value_i = 0;
    const char *value_s = pe_node_attribute_raw(node, PCMK_NODE_ATTR_TERMINATE);

    // Value may be boolean or an epoch time
    if (crm_str_to_boolean(value_s, &value_i) == 1) {
        return (value_i != 0);
    }
    if (pcmk__scan_ll(value_s, &value, 0LL) == pcmk_rc_ok) {
        return (value > 0);
    }
    crm_warn("Ignoring unrecognized value '%s' for " PCMK_NODE_ATTR_TERMINATE
             "node attribute for %s", value_s, pe__node_name(node));
    return false;
}

static gboolean
determine_online_status_no_fencing(pcmk_scheduler_t *scheduler,
                                   const xmlNode *node_state,
                                   pcmk_node_t *this_node)
{
    gboolean online = FALSE;
    const char *join = crm_element_value(node_state, PCMK__XA_JOIN);
    const char *exp_state = crm_element_value(node_state, PCMK__XA_EXPECTED);
    long long when_member = unpack_node_member(node_state, scheduler);
    long long when_online = unpack_node_online(node_state);

    if (when_member <= 0) {
        crm_trace("Node %s is %sdown", pe__node_name(this_node),
                  ((when_member < 0)? "presumed " : ""));

    } else if (when_online > 0) {
        if (pcmk__str_eq(join, CRMD_JOINSTATE_MEMBER, pcmk__str_casei)) {
            online = TRUE;
        } else {
            crm_debug("Node %s is not ready to run resources: %s",
                      pe__node_name(this_node), join);
        }

    } else if (this_node->details->expected_up == FALSE) {
        crm_trace("Node %s controller is down: "
                  "member@%lld online@%lld join=%s expected=%s",
                  pe__node_name(this_node), when_member, when_online,
                  pcmk__s(join, "<null>"), pcmk__s(exp_state, "<null>"));

    } else {
        /* mark it unclean */
        pe_fence_node(scheduler, this_node, "peer is unexpectedly down", FALSE);
        crm_info("Node %s member@%lld online@%lld join=%s expected=%s",
                 pe__node_name(this_node), when_member, when_online,
                 pcmk__s(join, "<null>"), pcmk__s(exp_state, "<null>"));
    }
    return online;
}

static inline bool
pending_too_long(pcmk_scheduler_t *scheduler, const pcmk_node_t *node,
                 long long when_member, long long when_online)
{
    if ((scheduler->node_pending_timeout > 0)
        && (when_member > 0) && (when_online <= 0)) {
        // There is a timeout on pending nodes, and node is pending

        time_t timeout = when_member + scheduler->node_pending_timeout;

        if (get_effective_time(node->details->data_set) >= timeout) {
            return true; // Node has timed out
        }

        // Node is pending, but still has time
        pe__update_recheck_time(timeout, scheduler, "pending node timeout");
    }
    return false;
}

static bool
determine_online_status_fencing(pcmk_scheduler_t *scheduler,
                                const xmlNode *node_state,
                                pcmk_node_t *this_node)
{
    bool termination_requested = unpack_node_terminate(this_node, node_state);
    const char *join = crm_element_value(node_state, PCMK__XA_JOIN);
    const char *exp_state = crm_element_value(node_state, PCMK__XA_EXPECTED);
    long long when_member = unpack_node_member(node_state, scheduler);
    long long when_online = unpack_node_online(node_state);

/*
  - PCMK__XA_JOIN          ::= member|down|pending|banned
  - PCMK__XA_EXPECTED      ::= member|down

  @COMPAT with entries recorded for DCs < 2.1.7
  - PCMK__XA_IN_CCM        ::= true|false
  - PCMK__XA_CRMD          ::= online|offline

  Since crm_feature_set 3.18.0 (pacemaker-2.1.7):
  - PCMK__XA_IN_CCM        ::= <timestamp>|0
  Since when node has been a cluster member. A value 0 of means the node is not
  a cluster member.

  - PCMK__XA_CRMD          ::= <timestamp>|0
  Since when peer has been online in CPG. A value 0 means the peer is offline
  in CPG.
*/

    crm_trace("Node %s member@%lld online@%lld join=%s expected=%s%s",
              pe__node_name(this_node), when_member, when_online,
              pcmk__s(join, "<null>"), pcmk__s(exp_state, "<null>"),
              (termination_requested? " (termination requested)" : ""));

    if (this_node->details->shutdown) {
        crm_debug("%s is shutting down", pe__node_name(this_node));

        /* Slightly different criteria since we can't shut down a dead peer */
        return (when_online > 0);
    }

    if (when_member < 0) {
        pe_fence_node(scheduler, this_node,
                      "peer has not been seen by the cluster", FALSE);
        return false;
    }

    if (pcmk__str_eq(join, CRMD_JOINSTATE_NACK, pcmk__str_none)) {
        pe_fence_node(scheduler, this_node,
                      "peer failed Pacemaker membership criteria", FALSE);

    } else if (termination_requested) {
        if ((when_member <= 0) && (when_online <= 0)
            && pcmk__str_eq(join, CRMD_JOINSTATE_DOWN, pcmk__str_none)) {
            crm_info("%s was fenced as requested", pe__node_name(this_node));
            return false;
        }
        pe_fence_node(scheduler, this_node, "fencing was requested", false);

    } else if (pcmk__str_eq(exp_state, CRMD_JOINSTATE_DOWN,
                            pcmk__str_null_matches)) {

        if (pending_too_long(scheduler, this_node, when_member, when_online)) {
            pe_fence_node(scheduler, this_node,
                          "peer pending timed out on joining the process group",
                          FALSE);

        } else if ((when_member > 0) || (when_online > 0)) {
            crm_info("- %s is not ready to run resources",
                     pe__node_name(this_node));
            this_node->details->standby = TRUE;
            this_node->details->pending = TRUE;

        } else {
            crm_trace("%s is down or still coming up",
                      pe__node_name(this_node));
        }

    } else if (when_member <= 0) {
        // Consider `priority-fencing-delay` for lost nodes
        pe_fence_node(scheduler, this_node,
                      "peer is no longer part of the cluster", TRUE);

    } else if (when_online <= 0) {
        pe_fence_node(scheduler, this_node,
                      "peer process is no longer available", FALSE);

        /* Everything is running at this point, now check join state */

    } else if (pcmk__str_eq(join, CRMD_JOINSTATE_MEMBER, pcmk__str_none)) {
        crm_info("%s is active", pe__node_name(this_node));

    } else if (pcmk__str_any_of(join, CRMD_JOINSTATE_PENDING,
                                CRMD_JOINSTATE_DOWN, NULL)) {
        crm_info("%s is not ready to run resources", pe__node_name(this_node));
        this_node->details->standby = TRUE;
        this_node->details->pending = TRUE;

    } else {
        pe_fence_node(scheduler, this_node, "peer was in an unknown state",
                      FALSE);
    }

    return (when_member > 0);
}

static void
determine_remote_online_status(pcmk_scheduler_t *scheduler,
                               pcmk_node_t *this_node)
{
    pcmk_resource_t *rsc = this_node->details->remote_rsc;
    pcmk_resource_t *container = NULL;
    pcmk_node_t *host = NULL;

    /* If there is a node state entry for a (former) Pacemaker Remote node
     * but no resource creating that node, the node's connection resource will
     * be NULL. Consider it an offline remote node in that case.
     */
    if (rsc == NULL) {
        this_node->details->online = FALSE;
        goto remote_online_done;
    }

    container = rsc->container;

    if (container && pcmk__list_of_1(rsc->running_on)) {
        host = rsc->running_on->data;
    }

    /* If the resource is currently started, mark it online. */
    if (rsc->role == pcmk_role_started) {
        crm_trace("%s node %s presumed ONLINE because connection resource is started",
                  (container? "Guest" : "Remote"), this_node->details->id);
        this_node->details->online = TRUE;
    }

    /* consider this node shutting down if transitioning start->stop */
    if ((rsc->role == pcmk_role_started)
        && (rsc->next_role == pcmk_role_stopped)) {

        crm_trace("%s node %s shutting down because connection resource is stopping",
                  (container? "Guest" : "Remote"), this_node->details->id);
        this_node->details->shutdown = TRUE;
    }

    /* Now check all the failure conditions. */
    if(container && pcmk_is_set(container->flags, pcmk_rsc_failed)) {
        crm_trace("Guest node %s UNCLEAN because guest resource failed",
                  this_node->details->id);
        this_node->details->online = FALSE;
        this_node->details->remote_requires_reset = TRUE;

    } else if (pcmk_is_set(rsc->flags, pcmk_rsc_failed)) {
        crm_trace("%s node %s OFFLINE because connection resource failed",
                  (container? "Guest" : "Remote"), this_node->details->id);
        this_node->details->online = FALSE;

    } else if ((rsc->role == pcmk_role_stopped)
               || ((container != NULL)
                   && (container->role == pcmk_role_stopped))) {

        crm_trace("%s node %s OFFLINE because its resource is stopped",
                  (container? "Guest" : "Remote"), this_node->details->id);
        this_node->details->online = FALSE;
        this_node->details->remote_requires_reset = FALSE;

    } else if (host && (host->details->online == FALSE)
               && host->details->unclean) {
        crm_trace("Guest node %s UNCLEAN because host is unclean",
                  this_node->details->id);
        this_node->details->online = FALSE;
        this_node->details->remote_requires_reset = TRUE;
    }

remote_online_done:
    crm_trace("Remote node %s online=%s",
        this_node->details->id, this_node->details->online ? "TRUE" : "FALSE");
}

static void
determine_online_status(const xmlNode *node_state, pcmk_node_t *this_node,
                        pcmk_scheduler_t *scheduler)
{
    gboolean online = FALSE;
    const char *exp_state = crm_element_value(node_state, PCMK__XA_EXPECTED);

    CRM_CHECK(this_node != NULL, return);

    this_node->details->shutdown = FALSE;
    this_node->details->expected_up = FALSE;

    if (pe__shutdown_requested(this_node)) {
        this_node->details->shutdown = TRUE;

    } else if (pcmk__str_eq(exp_state, CRMD_JOINSTATE_MEMBER, pcmk__str_casei)) {
        this_node->details->expected_up = TRUE;
    }

    if (this_node->details->type == node_ping) {
        this_node->details->unclean = FALSE;
        online = FALSE;         /* As far as resource management is concerned,
                                 * the node is safely offline.
                                 * Anyone caught abusing this logic will be shot
                                 */

    } else if (!pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
        online = determine_online_status_no_fencing(scheduler, node_state,
                                                    this_node);

    } else {
        online = determine_online_status_fencing(scheduler, node_state,
                                                 this_node);
    }

    if (online) {
        this_node->details->online = TRUE;

    } else {
        /* remove node from contention */
        this_node->fixed = TRUE; // @COMPAT deprecated and unused
        this_node->weight = -INFINITY;
    }

    if (online && this_node->details->shutdown) {
        /* don't run resources here */
        this_node->fixed = TRUE; // @COMPAT deprecated and unused
        this_node->weight = -INFINITY;
    }

    if (this_node->details->type == node_ping) {
        crm_info("%s is not a Pacemaker node", pe__node_name(this_node));

    } else if (this_node->details->unclean) {
        pe_proc_warn("%s is unclean", pe__node_name(this_node));

    } else if (this_node->details->online) {
        crm_info("%s is %s", pe__node_name(this_node),
                 this_node->details->shutdown ? "shutting down" :
                 this_node->details->pending ? "pending" :
                 this_node->details->standby ? "standby" :
                 this_node->details->maintenance ? "maintenance" : "online");

    } else {
        crm_trace("%s is offline", pe__node_name(this_node));
    }
}

const char *
pe_base_name_end(const char *id)
{
    if (!pcmk__str_empty(id)) {
        const char *end = id + strlen(id) - 1;

        for (const char *s = end; s > id; --s) {
            switch (*s) {
                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                    break;
                case ':':
                    return (s == end)? s : (s - 1);
                default:
                    return end;
            }
        }
        return end;
    }
    return NULL;
}

char *
clone_strip(const char *last_rsc_id)
{
    const char *end = pe_base_name_end(last_rsc_id);
    char *basename = NULL;

    CRM_ASSERT(end);
    basename = strndup(last_rsc_id, end - last_rsc_id + 1);
    CRM_ASSERT(basename);
    return basename;
}

char *
clone_zero(const char *last_rsc_id)
{
    const char *end = pe_base_name_end(last_rsc_id);
    size_t base_name_len = end - last_rsc_id + 1;
    char *zero = NULL;

    CRM_ASSERT(end);
    zero = calloc(base_name_len + 3, sizeof(char));
    CRM_ASSERT(zero);
    memcpy(zero, last_rsc_id, base_name_len);
    zero[base_name_len] = ':';
    zero[base_name_len + 1] = '0';
    return zero;
}

static pcmk_resource_t *
create_fake_resource(const char *rsc_id, const xmlNode *rsc_entry,
                     pcmk_scheduler_t *scheduler)
{
    pcmk_resource_t *rsc = NULL;
    xmlNode *xml_rsc = create_xml_node(NULL, XML_CIB_TAG_RESOURCE);

    copy_in_properties(xml_rsc, rsc_entry);
    crm_xml_add(xml_rsc, XML_ATTR_ID, rsc_id);
    crm_log_xml_debug(xml_rsc, "Orphan resource");

    if (pe__unpack_resource(xml_rsc, &rsc, NULL, scheduler) != pcmk_rc_ok) {
        return NULL;
    }

    if (xml_contains_remote_node(xml_rsc)) {
        pcmk_node_t *node;

        crm_debug("Detected orphaned remote node %s", rsc_id);
        node = pe_find_node(scheduler->nodes, rsc_id);
        if (node == NULL) {
            node = pe_create_node(rsc_id, rsc_id, "remote", NULL, scheduler);
        }
        link_rsc2remotenode(scheduler, rsc);

        if (node) {
            crm_trace("Setting node %s as shutting down due to orphaned connection resource", rsc_id);
            node->details->shutdown = TRUE;
        }
    }

    if (crm_element_value(rsc_entry, XML_RSC_ATTR_CONTAINER)) {
        /* This orphaned rsc needs to be mapped to a container. */
        crm_trace("Detected orphaned container filler %s", rsc_id);
        pe__set_resource_flags(rsc, pcmk_rsc_removed_filler);
    }
    pe__set_resource_flags(rsc, pcmk_rsc_removed);
    scheduler->resources = g_list_append(scheduler->resources, rsc);
    return rsc;
}

static pcmk_resource_t *
create_anonymous_orphan(pcmk_resource_t *parent, const char *rsc_id,
                        const pcmk_node_t *node, pcmk_scheduler_t *scheduler)
{
    pcmk_resource_t *top = pe__create_clone_child(parent, scheduler);

    // find_rsc() because we might be a cloned group
    pcmk_resource_t *orphan = top->fns->find_rsc(top, rsc_id, NULL,
                                               pcmk_rsc_match_clone_only);

    pe_rsc_debug(parent, "Created orphan %s for %s: %s on %s",
                 top->id, parent->id, rsc_id, pe__node_name(node));
    return orphan;
}

static pcmk_resource_t *
find_anonymous_clone(pcmk_scheduler_t *scheduler, const pcmk_node_t *node,
                     pcmk_resource_t *parent, const char *rsc_id)
{
    GList *rIter = NULL;
    pcmk_resource_t *rsc = NULL;
    pcmk_resource_t *inactive_instance = NULL;
    gboolean skip_inactive = FALSE;

    CRM_ASSERT(parent != NULL);
    CRM_ASSERT(pe_rsc_is_clone(parent));
    CRM_ASSERT(!pcmk_is_set(parent->flags, pcmk_rsc_unique));

    // Check for active (or partially active, for cloned groups) instance
    pe_rsc_trace(parent, "Looking for %s on %s in %s",
                 rsc_id, pe__node_name(node), parent->id);
    for (rIter = parent->children; rsc == NULL && rIter; rIter = rIter->next) {
        GList *locations = NULL;
        pcmk_resource_t *child = rIter->data;

        /* Check whether this instance is already known to be active or pending
         * anywhere, at this stage of unpacking. Because this function is called
         * for a resource before the resource's individual operation history
         * entries are unpacked, locations will generally not contain the
         * desired node.
         *
         * However, there are three exceptions:
         * (1) when child is a cloned group and we have already unpacked the
         *     history of another member of the group on the same node;
         * (2) when we've already unpacked the history of another numbered
         *     instance on the same node (which can happen if globally-unique
         *     was flipped from true to false); and
         * (3) when we re-run calculations on the same scheduler data as part of
         *     a simulation.
         */
        child->fns->location(child, &locations, 2);
        if (locations) {
            /* We should never associate the same numbered anonymous clone
             * instance with multiple nodes, and clone instances can't migrate,
             * so there must be only one location, regardless of history.
             */
            CRM_LOG_ASSERT(locations->next == NULL);

            if (((pcmk_node_t *) locations->data)->details == node->details) {
                /* This child instance is active on the requested node, so check
                 * for a corresponding configured resource. We use find_rsc()
                 * instead of child because child may be a cloned group, and we
                 * need the particular member corresponding to rsc_id.
                 *
                 * If the history entry is orphaned, rsc will be NULL.
                 */
                rsc = parent->fns->find_rsc(child, rsc_id, NULL,
                                            pcmk_rsc_match_clone_only);
                if (rsc) {
                    /* If there are multiple instance history entries for an
                     * anonymous clone in a single node's history (which can
                     * happen if globally-unique is switched from true to
                     * false), we want to consider the instances beyond the
                     * first as orphans, even if there are inactive instance
                     * numbers available.
                     */
                    if (rsc->running_on) {
                        crm_notice("Active (now-)anonymous clone %s has "
                                   "multiple (orphan) instance histories on %s",
                                   parent->id, pe__node_name(node));
                        skip_inactive = TRUE;
                        rsc = NULL;
                    } else {
                        pe_rsc_trace(parent, "Resource %s, active", rsc->id);
                    }
                }
            }
            g_list_free(locations);

        } else {
            pe_rsc_trace(parent, "Resource %s, skip inactive", child->id);
            if (!skip_inactive && !inactive_instance
                && !pcmk_is_set(child->flags, pcmk_rsc_blocked)) {
                // Remember one inactive instance in case we don't find active
                inactive_instance = parent->fns->find_rsc(child, rsc_id, NULL,
                                                          pcmk_rsc_match_clone_only);

                /* ... but don't use it if it was already associated with a
                 * pending action on another node
                 */
                if (inactive_instance && inactive_instance->pending_node
                    && (inactive_instance->pending_node->details != node->details)) {
                    inactive_instance = NULL;
                }
            }
        }
    }

    if ((rsc == NULL) && !skip_inactive && (inactive_instance != NULL)) {
        pe_rsc_trace(parent, "Resource %s, empty slot", inactive_instance->id);
        rsc = inactive_instance;
    }

    /* If the resource has "requires" set to "quorum" or "nothing", and we don't
     * have a clone instance for every node, we don't want to consume a valid
     * instance number for unclean nodes. Such instances may appear to be active
     * according to the history, but should be considered inactive, so we can
     * start an instance elsewhere. Treat such instances as orphans.
     *
     * An exception is instances running on guest nodes -- since guest node
     * "fencing" is actually just a resource stop, requires shouldn't apply.
     *
     * @TODO Ideally, we'd use an inactive instance number if it is not needed
     * for any clean instances. However, we don't know that at this point.
     */
    if ((rsc != NULL) && !pcmk_is_set(rsc->flags, pcmk_rsc_needs_fencing)
        && (!node->details->online || node->details->unclean)
        && !pe__is_guest_node(node)
        && !pe__is_universal_clone(parent, scheduler)) {

        rsc = NULL;
    }

    if (rsc == NULL) {
        rsc = create_anonymous_orphan(parent, rsc_id, node, scheduler);
        pe_rsc_trace(parent, "Resource %s, orphan", rsc->id);
    }
    return rsc;
}

static pcmk_resource_t *
unpack_find_resource(pcmk_scheduler_t *scheduler, const pcmk_node_t *node,
                     const char *rsc_id)
{
    pcmk_resource_t *rsc = NULL;
    pcmk_resource_t *parent = NULL;

    crm_trace("looking for %s", rsc_id);
    rsc = pe_find_resource(scheduler->resources, rsc_id);

    if (rsc == NULL) {
        /* If we didn't find the resource by its name in the operation history,
         * check it again as a clone instance. Even when clone-max=0, we create
         * a single :0 orphan to match against here.
         */
        char *clone0_id = clone_zero(rsc_id);
        pcmk_resource_t *clone0 = pe_find_resource(scheduler->resources,
                                                   clone0_id);

        if (clone0 && !pcmk_is_set(clone0->flags, pcmk_rsc_unique)) {
            rsc = clone0;
            parent = uber_parent(clone0);
            crm_trace("%s found as %s (%s)", rsc_id, clone0_id, parent->id);
        } else {
            crm_trace("%s is not known as %s either (orphan)",
                      rsc_id, clone0_id);
        }
        free(clone0_id);

    } else if (rsc->variant > pcmk_rsc_variant_primitive) {
        crm_trace("Resource history for %s is orphaned because it is no longer primitive",
                  rsc_id);
        return NULL;

    } else {
        parent = uber_parent(rsc);
    }

    if (pe_rsc_is_anon_clone(parent)) {

        if (pe_rsc_is_bundled(parent)) {
            rsc = pe__find_bundle_replica(parent->parent, node);
        } else {
            char *base = clone_strip(rsc_id);

            rsc = find_anonymous_clone(scheduler, node, parent, base);
            free(base);
            CRM_ASSERT(rsc != NULL);
        }
    }

    if (rsc && !pcmk__str_eq(rsc_id, rsc->id, pcmk__str_casei)
        && !pcmk__str_eq(rsc_id, rsc->clone_name, pcmk__str_casei)) {

        pcmk__str_update(&rsc->clone_name, rsc_id);
        pe_rsc_debug(rsc, "Internally renamed %s on %s to %s%s",
                     rsc_id, pe__node_name(node), rsc->id,
                     (pcmk_is_set(rsc->flags, pcmk_rsc_removed)? " (ORPHAN)" : ""));
    }
    return rsc;
}

static pcmk_resource_t *
process_orphan_resource(const xmlNode *rsc_entry, const pcmk_node_t *node,
                        pcmk_scheduler_t *scheduler)
{
    pcmk_resource_t *rsc = NULL;
    const char *rsc_id = crm_element_value(rsc_entry, XML_ATTR_ID);

    crm_debug("Detected orphan resource %s on %s", rsc_id, pe__node_name(node));
    rsc = create_fake_resource(rsc_id, rsc_entry, scheduler);
    if (rsc == NULL) {
        return NULL;
    }

    if (!pcmk_is_set(scheduler->flags, pcmk_sched_stop_removed_resources)) {
        pe__clear_resource_flags(rsc, pcmk_rsc_managed);

    } else {
        CRM_CHECK(rsc != NULL, return NULL);
        pe_rsc_trace(rsc, "Added orphan %s", rsc->id);
        resource_location(rsc, NULL, -INFINITY, "__orphan_do_not_run__",
                          scheduler);
    }
    return rsc;
}

static void
process_rsc_state(pcmk_resource_t *rsc, pcmk_node_t *node,
                  enum action_fail_response on_fail)
{
    pcmk_node_t *tmpnode = NULL;
    char *reason = NULL;
    enum action_fail_response save_on_fail = pcmk_on_fail_ignore;

    CRM_ASSERT(rsc);
    pe_rsc_trace(rsc, "Resource %s is %s on %s: on_fail=%s",
                 rsc->id, role2text(rsc->role), pe__node_name(node),
                 fail2text(on_fail));

    /* process current state */
    if (rsc->role != pcmk_role_unknown) {
        pcmk_resource_t *iter = rsc;

        while (iter) {
            if (g_hash_table_lookup(iter->known_on, node->details->id) == NULL) {
                pcmk_node_t *n = pe__copy_node(node);

                pe_rsc_trace(rsc, "%s%s%s known on %s",
                             rsc->id,
                             ((rsc->clone_name == NULL)? "" : " also known as "),
                             ((rsc->clone_name == NULL)? "" : rsc->clone_name),
                             pe__node_name(n));
                g_hash_table_insert(iter->known_on, (gpointer) n->details->id, n);
            }
            if (pcmk_is_set(iter->flags, pcmk_rsc_unique)) {
                break;
            }
            iter = iter->parent;
        }
    }

    /* If a managed resource is believed to be running, but node is down ... */
    if ((rsc->role > pcmk_role_stopped)
        && node->details->online == FALSE
        && node->details->maintenance == FALSE
        && pcmk_is_set(rsc->flags, pcmk_rsc_managed)) {

        gboolean should_fence = FALSE;

        /* If this is a guest node, fence it (regardless of whether fencing is
         * enabled, because guest node fencing is done by recovery of the
         * container resource rather than by the fencer). Mark the resource
         * we're processing as failed. When the guest comes back up, its
         * operation history in the CIB will be cleared, freeing the affected
         * resource to run again once we are sure we know its state.
         */
        if (pe__is_guest_node(node)) {
            pe__set_resource_flags(rsc,
                                   pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            should_fence = TRUE;

        } else if (pcmk_is_set(rsc->cluster->flags,
                               pcmk_sched_fencing_enabled)) {
            if (pe__is_remote_node(node) && node->details->remote_rsc
                && !pcmk_is_set(node->details->remote_rsc->flags,
                                pcmk_rsc_failed)) {

                /* Setting unseen means that fencing of the remote node will
                 * occur only if the connection resource is not going to start
                 * somewhere. This allows connection resources on a failed
                 * cluster node to move to another node without requiring the
                 * remote nodes to be fenced as well.
                 */
                node->details->unseen = TRUE;
                reason = crm_strdup_printf("%s is active there (fencing will be"
                                           " revoked if remote connection can "
                                           "be re-established elsewhere)",
                                           rsc->id);
            }
            should_fence = TRUE;
        }

        if (should_fence) {
            if (reason == NULL) {
               reason = crm_strdup_printf("%s is thought to be active there", rsc->id);
            }
            pe_fence_node(rsc->cluster, node, reason, FALSE);
        }
        free(reason);
    }

    /* In order to calculate priority_fencing_delay correctly, save the failure information and pass it to native_add_running(). */
    save_on_fail = on_fail;

    if (node->details->unclean) {
        /* No extra processing needed
         * Also allows resources to be started again after a node is shot
         */
        on_fail = pcmk_on_fail_ignore;
    }

    switch (on_fail) {
        case pcmk_on_fail_ignore:
            /* nothing to do */
            break;

        case pcmk_on_fail_demote:
            pe__set_resource_flags(rsc, pcmk_rsc_failed);
            demote_action(rsc, node, FALSE);
            break;

        case pcmk_on_fail_fence_node:
            /* treat it as if it is still running
             * but also mark the node as unclean
             */
            reason = crm_strdup_printf("%s failed there", rsc->id);
            pe_fence_node(rsc->cluster, node, reason, FALSE);
            free(reason);
            break;

        case pcmk_on_fail_standby_node:
            node->details->standby = TRUE;
            node->details->standby_onfail = TRUE;
            break;

        case pcmk_on_fail_block:
            /* is_managed == FALSE will prevent any
             * actions being sent for the resource
             */
            pe__clear_resource_flags(rsc, pcmk_rsc_managed);
            pe__set_resource_flags(rsc, pcmk_rsc_blocked);
            break;

        case pcmk_on_fail_ban:
            /* make sure it comes up somewhere else
             * or not at all
             */
            resource_location(rsc, node, -INFINITY, "__action_migration_auto__",
                              rsc->cluster);
            break;

        case pcmk_on_fail_stop:
            pe__set_next_role(rsc, pcmk_role_stopped, "on-fail=stop");
            break;

        case pcmk_on_fail_restart:
            if ((rsc->role != pcmk_role_stopped)
                && (rsc->role != pcmk_role_unknown)) {
                pe__set_resource_flags(rsc,
                                       pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
                stop_action(rsc, node, FALSE);
            }
            break;

        case pcmk_on_fail_restart_container:
            pe__set_resource_flags(rsc,
                                   pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            if (rsc->container && pe_rsc_is_bundled(rsc)) {
                /* A bundle's remote connection can run on a different node than
                 * the bundle's container. We don't necessarily know where the
                 * container is running yet, so remember it and add a stop
                 * action for it later.
                 */
                rsc->cluster->stop_needed =
                    g_list_prepend(rsc->cluster->stop_needed, rsc->container);
            } else if (rsc->container) {
                stop_action(rsc->container, node, FALSE);
            } else if ((rsc->role != pcmk_role_stopped)
                       && (rsc->role != pcmk_role_unknown)) {
                stop_action(rsc, node, FALSE);
            }
            break;

        case pcmk_on_fail_reset_remote:
            pe__set_resource_flags(rsc,
                                   pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            if (pcmk_is_set(rsc->cluster->flags, pcmk_sched_fencing_enabled)) {
                tmpnode = NULL;
                if (rsc->is_remote_node) {
                    tmpnode = pe_find_node(rsc->cluster->nodes, rsc->id);
                }
                if (tmpnode &&
                    pe__is_remote_node(tmpnode) &&
                    tmpnode->details->remote_was_fenced == 0) {

                    /* The remote connection resource failed in a way that
                     * should result in fencing the remote node.
                     */
                    pe_fence_node(rsc->cluster, tmpnode,
                                  "remote connection is unrecoverable", FALSE);
                }
            }

            /* require the stop action regardless if fencing is occurring or not. */
            if (rsc->role > pcmk_role_stopped) {
                stop_action(rsc, node, FALSE);
            }

            /* if reconnect delay is in use, prevent the connection from exiting the
             * "STOPPED" role until the failure is cleared by the delay timeout. */
            if (rsc->remote_reconnect_ms) {
                pe__set_next_role(rsc, pcmk_role_stopped, "remote reset");
            }
            break;
    }

    /* ensure a remote-node connection failure forces an unclean remote-node
     * to be fenced. By setting unseen = FALSE, the remote-node failure will
     * result in a fencing operation regardless if we're going to attempt to 
     * reconnect to the remote-node in this transition or not. */
    if (pcmk_is_set(rsc->flags, pcmk_rsc_failed) && rsc->is_remote_node) {
        tmpnode = pe_find_node(rsc->cluster->nodes, rsc->id);
        if (tmpnode && tmpnode->details->unclean) {
            tmpnode->details->unseen = FALSE;
        }
    }

    if ((rsc->role != pcmk_role_stopped)
        && (rsc->role != pcmk_role_unknown)) {
        if (pcmk_is_set(rsc->flags, pcmk_rsc_removed)) {
            if (pcmk_is_set(rsc->flags, pcmk_rsc_managed)) {
                pcmk__config_warn("Detected active orphan %s running on %s",
                                  rsc->id, pe__node_name(node));
            } else {
                pcmk__config_warn("Resource '%s' must be stopped manually on "
                                  "%s because cluster is configured not to "
                                  "stop active orphans",
                                  rsc->id, pe__node_name(node));
            }
        }

        native_add_running(rsc, node, rsc->cluster,
                           (save_on_fail != pcmk_on_fail_ignore));
        switch (on_fail) {
            case pcmk_on_fail_ignore:
                break;
            case pcmk_on_fail_demote:
            case pcmk_on_fail_block:
                pe__set_resource_flags(rsc, pcmk_rsc_failed);
                break;
            default:
                pe__set_resource_flags(rsc,
                                       pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
                break;
        }

    } else if (rsc->clone_name && strchr(rsc->clone_name, ':') != NULL) {
        /* Only do this for older status sections that included instance numbers
         * Otherwise stopped instances will appear as orphans
         */
        pe_rsc_trace(rsc, "Resetting clone_name %s for %s (stopped)", rsc->clone_name, rsc->id);
        free(rsc->clone_name);
        rsc->clone_name = NULL;

    } else {
        GList *possible_matches = pe__resource_actions(rsc, node,
                                                       PCMK_ACTION_STOP, FALSE);
        GList *gIter = possible_matches;

        for (; gIter != NULL; gIter = gIter->next) {
            pcmk_action_t *stop = (pcmk_action_t *) gIter->data;

            pe__set_action_flags(stop, pcmk_action_optional);
        }

        g_list_free(possible_matches);
    }

    /* A successful stop after migrate_to on the migration source doesn't make
     * the partially migrated resource stopped on the migration target.
     */
    if ((rsc->role == pcmk_role_stopped)
        && rsc->partial_migration_source
        && rsc->partial_migration_source->details == node->details
        && rsc->partial_migration_target
        && rsc->running_on) {

        rsc->role = pcmk_role_started;
    }
}

/* create active recurring operations as optional */
static void
process_recurring(pcmk_node_t *node, pcmk_resource_t *rsc,
                  int start_index, int stop_index,
                  GList *sorted_op_list, pcmk_scheduler_t *scheduler)
{
    int counter = -1;
    const char *task = NULL;
    const char *status = NULL;
    GList *gIter = sorted_op_list;

    CRM_ASSERT(rsc);
    pe_rsc_trace(rsc, "%s: Start index %d, stop index = %d", rsc->id, start_index, stop_index);

    for (; gIter != NULL; gIter = gIter->next) {
        xmlNode *rsc_op = (xmlNode *) gIter->data;

        guint interval_ms = 0;
        char *key = NULL;
        const char *id = ID(rsc_op);

        counter++;

        if (node->details->online == FALSE) {
            pe_rsc_trace(rsc, "Skipping %s on %s: node is offline",
                         rsc->id, pe__node_name(node));
            break;

            /* Need to check if there's a monitor for role="Stopped" */
        } else if (start_index < stop_index && counter <= stop_index) {
            pe_rsc_trace(rsc, "Skipping %s on %s: resource is not active",
                         id, pe__node_name(node));
            continue;

        } else if (counter < start_index) {
            pe_rsc_trace(rsc, "Skipping %s on %s: old %d",
                         id, pe__node_name(node), counter);
            continue;
        }

        crm_element_value_ms(rsc_op, XML_LRM_ATTR_INTERVAL_MS, &interval_ms);
        if (interval_ms == 0) {
            pe_rsc_trace(rsc, "Skipping %s on %s: non-recurring",
                         id, pe__node_name(node));
            continue;
        }

        status = crm_element_value(rsc_op, XML_LRM_ATTR_OPSTATUS);
        if (pcmk__str_eq(status, "-1", pcmk__str_casei)) {
            pe_rsc_trace(rsc, "Skipping %s on %s: status",
                         id, pe__node_name(node));
            continue;
        }
        task = crm_element_value(rsc_op, XML_LRM_ATTR_TASK);
        /* create the action */
        key = pcmk__op_key(rsc->id, task, interval_ms);
        pe_rsc_trace(rsc, "Creating %s on %s", key, pe__node_name(node));
        custom_action(rsc, key, task, node, TRUE, scheduler);
    }
}

void
calculate_active_ops(const GList *sorted_op_list, int *start_index,
                     int *stop_index)
{
    int counter = -1;
    int implied_monitor_start = -1;
    int implied_clone_start = -1;
    const char *task = NULL;
    const char *status = NULL;

    *stop_index = -1;
    *start_index = -1;

    for (const GList *iter = sorted_op_list; iter != NULL; iter = iter->next) {
        const xmlNode *rsc_op = (const xmlNode *) iter->data;

        counter++;

        task = crm_element_value(rsc_op, XML_LRM_ATTR_TASK);
        status = crm_element_value(rsc_op, XML_LRM_ATTR_OPSTATUS);

        if (pcmk__str_eq(task, PCMK_ACTION_STOP, pcmk__str_casei)
            && pcmk__str_eq(status, "0", pcmk__str_casei)) {
            *stop_index = counter;

        } else if (pcmk__strcase_any_of(task, PCMK_ACTION_START,
                                        PCMK_ACTION_MIGRATE_FROM, NULL)) {
            *start_index = counter;

        } else if ((implied_monitor_start <= *stop_index)
                   && pcmk__str_eq(task, PCMK_ACTION_MONITOR,
                                   pcmk__str_casei)) {
            const char *rc = crm_element_value(rsc_op, XML_LRM_ATTR_RC);

            if (pcmk__strcase_any_of(rc, "0", "8", NULL)) {
                implied_monitor_start = counter;
            }
        } else if (pcmk__strcase_any_of(task, PCMK_ACTION_PROMOTE,
                                        PCMK_ACTION_DEMOTE, NULL)) {
            implied_clone_start = counter;
        }
    }

    if (*start_index == -1) {
        if (implied_clone_start != -1) {
            *start_index = implied_clone_start;
        } else if (implied_monitor_start != -1) {
            *start_index = implied_monitor_start;
        }
    }
}

// If resource history entry has shutdown lock, remember lock node and time
static void
unpack_shutdown_lock(const xmlNode *rsc_entry, pcmk_resource_t *rsc,
                     const pcmk_node_t *node, pcmk_scheduler_t *scheduler)
{
    time_t lock_time = 0;   // When lock started (i.e. node shutdown time)

    if ((crm_element_value_epoch(rsc_entry, XML_CONFIG_ATTR_SHUTDOWN_LOCK,
                                 &lock_time) == pcmk_ok) && (lock_time != 0)) {

        if ((scheduler->shutdown_lock > 0)
            && (get_effective_time(scheduler)
                > (lock_time + scheduler->shutdown_lock))) {
            pe_rsc_info(rsc, "Shutdown lock for %s on %s expired",
                        rsc->id, pe__node_name(node));
            pe__clear_resource_history(rsc, node);
        } else {
            /* @COMPAT I don't like breaking const signatures, but
             * rsc->lock_node should really be const -- we just can't change it
             * until the next API compatibility break.
             */
            rsc->lock_node = (pcmk_node_t *) node;
            rsc->lock_time = lock_time;
        }
    }
}

static pcmk_resource_t *
unpack_lrm_resource(pcmk_node_t *node, const xmlNode *lrm_resource,
                    pcmk_scheduler_t *scheduler)
{
    GList *gIter = NULL;
    int stop_index = -1;
    int start_index = -1;
    enum rsc_role_e req_role = pcmk_role_unknown;

    const char *rsc_id = ID(lrm_resource);

    pcmk_resource_t *rsc = NULL;
    GList *op_list = NULL;
    GList *sorted_op_list = NULL;

    xmlNode *rsc_op = NULL;
    xmlNode *last_failure = NULL;

    enum action_fail_response on_fail = pcmk_on_fail_ignore;
    enum rsc_role_e saved_role = pcmk_role_unknown;

    if (rsc_id == NULL) {
        crm_warn("Ignoring malformed " XML_LRM_TAG_RESOURCE
                 " entry without id");
        return NULL;
    }
    crm_trace("Unpacking " XML_LRM_TAG_RESOURCE " for %s on %s",
              rsc_id, pe__node_name(node));

    // Build a list of individual lrm_rsc_op entries, so we can sort them
    for (rsc_op = first_named_child(lrm_resource, XML_LRM_TAG_RSC_OP);
         rsc_op != NULL; rsc_op = crm_next_same_xml(rsc_op)) {

        op_list = g_list_prepend(op_list, rsc_op);
    }

    if (!pcmk_is_set(scheduler->flags, pcmk_sched_shutdown_lock)) {
        if (op_list == NULL) {
            // If there are no operations, there is nothing to do
            return NULL;
        }
    }

    /* find the resource */
    rsc = unpack_find_resource(scheduler, node, rsc_id);
    if (rsc == NULL) {
        if (op_list == NULL) {
            // If there are no operations, there is nothing to do
            return NULL;
        } else {
            rsc = process_orphan_resource(lrm_resource, node, scheduler);
        }
    }
    CRM_ASSERT(rsc != NULL);

    // Check whether the resource is "shutdown-locked" to this node
    if (pcmk_is_set(scheduler->flags, pcmk_sched_shutdown_lock)) {
        unpack_shutdown_lock(lrm_resource, rsc, node, scheduler);
    }

    /* process operations */
    saved_role = rsc->role;
    rsc->role = pcmk_role_unknown;
    sorted_op_list = g_list_sort(op_list, sort_op_by_callid);

    for (gIter = sorted_op_list; gIter != NULL; gIter = gIter->next) {
        xmlNode *rsc_op = (xmlNode *) gIter->data;

        unpack_rsc_op(rsc, node, rsc_op, &last_failure, &on_fail);
    }

    /* create active recurring operations as optional */
    calculate_active_ops(sorted_op_list, &start_index, &stop_index);
    process_recurring(node, rsc, start_index, stop_index, sorted_op_list,
                      scheduler);

    /* no need to free the contents */
    g_list_free(sorted_op_list);

    process_rsc_state(rsc, node, on_fail);

    if (get_target_role(rsc, &req_role)) {
        if ((rsc->next_role == pcmk_role_unknown)
            || (req_role < rsc->next_role)) {

            pe__set_next_role(rsc, req_role, XML_RSC_ATTR_TARGET_ROLE);

        } else if (req_role > rsc->next_role) {
            pe_rsc_info(rsc, "%s: Not overwriting calculated next role %s"
                        " with requested next role %s",
                        rsc->id, role2text(rsc->next_role), role2text(req_role));
        }
    }

    if (saved_role > rsc->role) {
        rsc->role = saved_role;
    }

    return rsc;
}

static void
handle_orphaned_container_fillers(const xmlNode *lrm_rsc_list,
                                  pcmk_scheduler_t *scheduler)
{
    for (const xmlNode *rsc_entry = pcmk__xe_first_child(lrm_rsc_list);
         rsc_entry != NULL; rsc_entry = pcmk__xe_next(rsc_entry)) {

        pcmk_resource_t *rsc;
        pcmk_resource_t *container;
        const char *rsc_id;
        const char *container_id;

        if (!pcmk__str_eq((const char *)rsc_entry->name, XML_LRM_TAG_RESOURCE, pcmk__str_casei)) {
            continue;
        }

        container_id = crm_element_value(rsc_entry, XML_RSC_ATTR_CONTAINER);
        rsc_id = crm_element_value(rsc_entry, XML_ATTR_ID);
        if (container_id == NULL || rsc_id == NULL) {
            continue;
        }

        container = pe_find_resource(scheduler->resources, container_id);
        if (container == NULL) {
            continue;
        }

        rsc = pe_find_resource(scheduler->resources, rsc_id);
        if ((rsc == NULL) || (rsc->container != NULL)
            || !pcmk_is_set(rsc->flags, pcmk_rsc_removed_filler)) {
            continue;
        }

        pe_rsc_trace(rsc, "Mapped container of orphaned resource %s to %s",
                     rsc->id, container_id);
        rsc->container = container;
        container->fillers = g_list_append(container->fillers, rsc);
    }
}

static void
unpack_node_lrm(pcmk_node_t *node, const xmlNode *xml,
                pcmk_scheduler_t *scheduler)
{
    bool found_orphaned_container_filler = false;

    // Drill down to lrm_resources section
    xml = find_xml_node(xml, XML_CIB_TAG_LRM, FALSE);
    if (xml == NULL) {
        return;
    }
    xml = find_xml_node(xml, XML_LRM_TAG_RESOURCES, FALSE);
    if (xml == NULL) {
        return;
    }

    // Unpack each lrm_resource entry
    for (const xmlNode *rsc_entry = first_named_child(xml, XML_LRM_TAG_RESOURCE);
         rsc_entry != NULL; rsc_entry = crm_next_same_xml(rsc_entry)) {

        pcmk_resource_t *rsc = unpack_lrm_resource(node, rsc_entry, scheduler);

        if ((rsc != NULL)
            && pcmk_is_set(rsc->flags, pcmk_rsc_removed_filler)) {
            found_orphaned_container_filler = true;
        }
    }

    /* Now that all resource state has been unpacked for this node, map any
     * orphaned container fillers to their container resource.
     */
    if (found_orphaned_container_filler) {
        handle_orphaned_container_fillers(xml, scheduler);
    }
}

static void
set_active(pcmk_resource_t *rsc)
{
    const pcmk_resource_t *top = pe__const_top_resource(rsc, false);

    if (top && pcmk_is_set(top->flags, pcmk_rsc_promotable)) {
        rsc->role = pcmk_role_unpromoted;
    } else {
        rsc->role = pcmk_role_started;
    }
}

static void
set_node_score(gpointer key, gpointer value, gpointer user_data)
{
    pcmk_node_t *node = value;
    int *score = user_data;

    node->weight = *score;
}

#define XPATH_NODE_STATE "/" XML_TAG_CIB "/" XML_CIB_TAG_STATUS     \
                         "/" XML_CIB_TAG_STATE
#define SUB_XPATH_LRM_RESOURCE "/" XML_CIB_TAG_LRM              \
                               "/" XML_LRM_TAG_RESOURCES        \
                               "/" XML_LRM_TAG_RESOURCE
#define SUB_XPATH_LRM_RSC_OP "/" XML_LRM_TAG_RSC_OP

static xmlNode *
find_lrm_op(const char *resource, const char *op, const char *node, const char *source,
            int target_rc, pcmk_scheduler_t *scheduler)
{
    GString *xpath = NULL;
    xmlNode *xml = NULL;

    CRM_CHECK((resource != NULL) && (op != NULL) && (node != NULL),
              return NULL);

    xpath = g_string_sized_new(256);
    pcmk__g_strcat(xpath,
                   XPATH_NODE_STATE "[@" XML_ATTR_UNAME "='", node, "']"
                   SUB_XPATH_LRM_RESOURCE "[@" XML_ATTR_ID "='", resource, "']"
                   SUB_XPATH_LRM_RSC_OP "[@" XML_LRM_ATTR_TASK "='", op, "'",
                   NULL);

    /* Need to check against transition_magic too? */
    if ((source != NULL) && (strcmp(op, PCMK_ACTION_MIGRATE_TO) == 0)) {
        pcmk__g_strcat(xpath,
                       " and @" XML_LRM_ATTR_MIGRATE_TARGET "='", source, "']",
                       NULL);

    } else if ((source != NULL)
               && (strcmp(op, PCMK_ACTION_MIGRATE_FROM) == 0)) {
        pcmk__g_strcat(xpath,
                       " and @" XML_LRM_ATTR_MIGRATE_SOURCE "='", source, "']",
                       NULL);
    } else {
        g_string_append_c(xpath, ']');
    }

    xml = get_xpath_object((const char *) xpath->str, scheduler->input,
                           LOG_DEBUG);
    g_string_free(xpath, TRUE);

    if (xml && target_rc >= 0) {
        int rc = PCMK_OCF_UNKNOWN_ERROR;
        int status = PCMK_EXEC_ERROR;

        crm_element_value_int(xml, XML_LRM_ATTR_RC, &rc);
        crm_element_value_int(xml, XML_LRM_ATTR_OPSTATUS, &status);
        if ((rc != target_rc) || (status != PCMK_EXEC_DONE)) {
            return NULL;
        }
    }
    return xml;
}

static xmlNode *
find_lrm_resource(const char *rsc_id, const char *node_name,
                  pcmk_scheduler_t *scheduler)
{
    GString *xpath = NULL;
    xmlNode *xml = NULL;

    CRM_CHECK((rsc_id != NULL) && (node_name != NULL), return NULL);

    xpath = g_string_sized_new(256);
    pcmk__g_strcat(xpath,
                   XPATH_NODE_STATE "[@" XML_ATTR_UNAME "='", node_name, "']"
                   SUB_XPATH_LRM_RESOURCE "[@" XML_ATTR_ID "='", rsc_id, "']",
                   NULL);

    xml = get_xpath_object((const char *) xpath->str, scheduler->input,
                           LOG_DEBUG);

    g_string_free(xpath, TRUE);
    return xml;
}

static bool
unknown_on_node(pcmk_resource_t *rsc, const char *node_name)
{
    bool result = false;
    xmlXPathObjectPtr search;
    GString *xpath = g_string_sized_new(256);

    pcmk__g_strcat(xpath,
                   XPATH_NODE_STATE "[@" XML_ATTR_UNAME "='", node_name, "']"
                   SUB_XPATH_LRM_RESOURCE "[@" XML_ATTR_ID "='", rsc->id, "']"
                   SUB_XPATH_LRM_RSC_OP "[@" XML_LRM_ATTR_RC "!='193']",
                   NULL);
    search = xpath_search(rsc->cluster->input, (const char *) xpath->str);
    result = (numXpathResults(search) == 0);
    freeXpathObject(search);
    g_string_free(xpath, TRUE);
    return result;
}

static bool
monitor_not_running_after(const char *rsc_id, const char *node_name,
                          const xmlNode *xml_op, bool same_node,
                          pcmk_scheduler_t *scheduler)
{
    /* Any probe/monitor operation on the node indicating it was not running
     * there
     */
    xmlNode *monitor = find_lrm_op(rsc_id, PCMK_ACTION_MONITOR, node_name,
                                   NULL, PCMK_OCF_NOT_RUNNING, scheduler);

    return (monitor && pe__is_newer_op(monitor, xml_op, same_node) > 0);
}

static bool
non_monitor_after(const char *rsc_id, const char *node_name,
                  const xmlNode *xml_op, bool same_node,
                  pcmk_scheduler_t *scheduler)
{
    xmlNode *lrm_resource = NULL;

    lrm_resource = find_lrm_resource(rsc_id, node_name, scheduler);
    if (lrm_resource == NULL) {
        return false;
    }

    for (xmlNode *op = first_named_child(lrm_resource, XML_LRM_TAG_RSC_OP);
         op != NULL; op = crm_next_same_xml(op)) {
        const char * task = NULL;

        if (op == xml_op) {
            continue;
        }

        task = crm_element_value(op, XML_LRM_ATTR_TASK);

        if (pcmk__str_any_of(task, PCMK_ACTION_START, PCMK_ACTION_STOP,
                             PCMK_ACTION_MIGRATE_TO, PCMK_ACTION_MIGRATE_FROM,
                             NULL)
            && pe__is_newer_op(op, xml_op, same_node) > 0) {
            return true;
        }
    }

    return false;
}

static bool
newer_state_after_migrate(const char *rsc_id, const char *node_name,
                          const xmlNode *migrate_to,
                          const xmlNode *migrate_from,
                          pcmk_scheduler_t *scheduler)
{
    const xmlNode *xml_op = migrate_to;
    const char *source = NULL;
    const char *target = NULL;
    bool same_node = false;

    if (migrate_from) {
        xml_op = migrate_from;
    }

    source = crm_element_value(xml_op, XML_LRM_ATTR_MIGRATE_SOURCE);
    target = crm_element_value(xml_op, XML_LRM_ATTR_MIGRATE_TARGET);

    /* It's preferred to compare to the migrate event on the same node if
     * existing, since call ids are more reliable.
     */
    if (pcmk__str_eq(node_name, target, pcmk__str_casei)) {
        if (migrate_from) {
           xml_op = migrate_from;
           same_node = true;

        } else {
           xml_op = migrate_to;
        }

    } else if (pcmk__str_eq(node_name, source, pcmk__str_casei)) {
        if (migrate_to) {
           xml_op = migrate_to;
           same_node = true;

        } else {
           xml_op = migrate_from;
        }
    }

    /* If there's any newer non-monitor operation on the node, or any newer
     * probe/monitor operation on the node indicating it was not running there,
     * the migration events potentially no longer matter for the node.
     */
    return non_monitor_after(rsc_id, node_name, xml_op, same_node, scheduler)
           || monitor_not_running_after(rsc_id, node_name, xml_op, same_node,
                                        scheduler);
}

static int
get_migration_node_names(const xmlNode *entry, const pcmk_node_t *source_node,
                         const pcmk_node_t *target_node,
                         const char **source_name, const char **target_name)
{
    *source_name = crm_element_value(entry, XML_LRM_ATTR_MIGRATE_SOURCE);
    *target_name = crm_element_value(entry, XML_LRM_ATTR_MIGRATE_TARGET);
    if ((*source_name == NULL) || (*target_name == NULL)) {
        crm_err("Ignoring resource history entry %s without "
                XML_LRM_ATTR_MIGRATE_SOURCE " and " XML_LRM_ATTR_MIGRATE_TARGET,
                ID(entry));
        return pcmk_rc_unpack_error;
    }

    if ((source_node != NULL)
        && !pcmk__str_eq(*source_name, source_node->details->uname,
                         pcmk__str_casei|pcmk__str_null_matches)) {
        crm_err("Ignoring resource history entry %s because "
                XML_LRM_ATTR_MIGRATE_SOURCE "='%s' does not match %s",
                ID(entry), *source_name, pe__node_name(source_node));
        return pcmk_rc_unpack_error;
    }

    if ((target_node != NULL)
        && !pcmk__str_eq(*target_name, target_node->details->uname,
                         pcmk__str_casei|pcmk__str_null_matches)) {
        crm_err("Ignoring resource history entry %s because "
                XML_LRM_ATTR_MIGRATE_TARGET "='%s' does not match %s",
                ID(entry), *target_name, pe__node_name(target_node));
        return pcmk_rc_unpack_error;
    }

    return pcmk_rc_ok;
}

/*
 * \internal
 * \brief Add a migration source to a resource's list of dangling migrations
 *
 * If the migrate_to and migrate_from actions in a live migration both
 * succeeded, but there is no stop on the source, the migration is considered
 * "dangling." Add the source to the resource's dangling migration list, which
 * will be used to schedule a stop on the source without affecting the target.
 *
 * \param[in,out] rsc   Resource involved in migration
 * \param[in]     node  Migration source
 */
static void
add_dangling_migration(pcmk_resource_t *rsc, const pcmk_node_t *node)
{
    pe_rsc_trace(rsc, "Dangling migration of %s requires stop on %s",
                 rsc->id, pe__node_name(node));
    rsc->role = pcmk_role_stopped;
    rsc->dangling_migrations = g_list_prepend(rsc->dangling_migrations,
                                              (gpointer) node);
}

static void
unpack_migrate_to_success(struct action_history *history)
{
    /* A complete migration sequence is:
     * 1. migrate_to on source node (which succeeded if we get to this function)
     * 2. migrate_from on target node
     * 3. stop on source node
     *
     * If no migrate_from has happened, the migration is considered to be
     * "partial". If the migrate_from succeeded but no stop has happened, the
     * migration is considered to be "dangling".
     *
     * If a successful migrate_to and stop have happened on the source node, we
     * still need to check for a partial migration, due to scenarios (easier to
     * produce with batch-limit=1) like:
     *
     * - A resource is migrating from node1 to node2, and a migrate_to is
     *   initiated for it on node1.
     *
     * - node2 goes into standby mode while the migrate_to is pending, which
     *   aborts the transition.
     *
     * - Upon completion of the migrate_to, a new transition schedules a stop
     *   on both nodes and a start on node1.
     *
     * - If the new transition is aborted for any reason while the resource is
     *   stopping on node1, the transition after that stop completes will see
     *   the migrate_to and stop on the source, but it's still a partial
     *   migration, and the resource must be stopped on node2 because it is
     *   potentially active there due to the migrate_to.
     *
     *   We also need to take into account that either node's history may be
     *   cleared at any point in the migration process.
     */
    int from_rc = PCMK_OCF_OK;
    int from_status = PCMK_EXEC_PENDING;
    pcmk_node_t *target_node = NULL;
    xmlNode *migrate_from = NULL;
    const char *source = NULL;
    const char *target = NULL;
    bool source_newer_op = false;
    bool target_newer_state = false;
    bool active_on_target = false;

    // Get source and target node names from XML
    if (get_migration_node_names(history->xml, history->node, NULL, &source,
                                 &target) != pcmk_rc_ok) {
        return;
    }

    // Check for newer state on the source
    source_newer_op = non_monitor_after(history->rsc->id, source, history->xml,
                                        true, history->rsc->cluster);

    // Check for a migrate_from action from this source on the target
    migrate_from = find_lrm_op(history->rsc->id, PCMK_ACTION_MIGRATE_FROM,
                               target, source, -1, history->rsc->cluster);
    if (migrate_from != NULL) {
        if (source_newer_op) {
            /* There's a newer non-monitor operation on the source and a
             * migrate_from on the target, so this migrate_to is irrelevant to
             * the resource's state.
             */
            return;
        }
        crm_element_value_int(migrate_from, XML_LRM_ATTR_RC, &from_rc);
        crm_element_value_int(migrate_from, XML_LRM_ATTR_OPSTATUS,
                              &from_status);
    }

    /* If the resource has newer state on both the source and target after the
     * migration events, this migrate_to is irrelevant to the resource's state.
     */
    target_newer_state = newer_state_after_migrate(history->rsc->id, target,
                                                   history->xml, migrate_from,
                                                   history->rsc->cluster);
    if (source_newer_op && target_newer_state) {
        return;
    }

    /* Check for dangling migration (migrate_from succeeded but stop not done).
     * We know there's no stop because we already returned if the target has a
     * migrate_from and the source has any newer non-monitor operation.
     */
    if ((from_rc == PCMK_OCF_OK) && (from_status == PCMK_EXEC_DONE)) {
        add_dangling_migration(history->rsc, history->node);
        return;
    }

    /* Without newer state, this migrate_to implies the resource is active.
     * (Clones are not allowed to migrate, so role can't be promoted.)
     */
    history->rsc->role = pcmk_role_started;

    target_node = pe_find_node(history->rsc->cluster->nodes, target);
    active_on_target = !target_newer_state && (target_node != NULL)
                       && target_node->details->online;

    if (from_status != PCMK_EXEC_PENDING) { // migrate_from failed on target
        if (active_on_target) {
            native_add_running(history->rsc, target_node, history->rsc->cluster,
                               TRUE);
        } else {
            // Mark resource as failed, require recovery, and prevent migration
            pe__set_resource_flags(history->rsc,
                                   pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            pe__clear_resource_flags(history->rsc, pcmk_rsc_migratable);
        }
        return;
    }

    // The migrate_from is pending, complete but erased, or to be scheduled

    /* If there is no history at all for the resource on an online target, then
     * it was likely cleaned. Just return, and we'll schedule a probe. Once we
     * have the probe result, it will be reflected in target_newer_state.
     */
    if ((target_node != NULL) && target_node->details->online
        && unknown_on_node(history->rsc, target)) {
        return;
    }

    if (active_on_target) {
        pcmk_node_t *source_node = pe_find_node(history->rsc->cluster->nodes,
                                                source);

        native_add_running(history->rsc, target_node, history->rsc->cluster,
                           FALSE);
        if ((source_node != NULL) && source_node->details->online) {
            /* This is a partial migration: the migrate_to completed
             * successfully on the source, but the migrate_from has not
             * completed. Remember the source and target; if the newly
             * chosen target remains the same when we schedule actions
             * later, we may continue with the migration.
             */
            history->rsc->partial_migration_target = target_node;
            history->rsc->partial_migration_source = source_node;
        }

    } else if (!source_newer_op) {
        // Mark resource as failed, require recovery, and prevent migration
        pe__set_resource_flags(history->rsc,
                               pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
        pe__clear_resource_flags(history->rsc, pcmk_rsc_migratable);
    }
}

static void
unpack_migrate_to_failure(struct action_history *history)
{
    xmlNode *target_migrate_from = NULL;
    const char *source = NULL;
    const char *target = NULL;

    // Get source and target node names from XML
    if (get_migration_node_names(history->xml, history->node, NULL, &source,
                                 &target) != pcmk_rc_ok) {
        return;
    }

    /* If a migration failed, we have to assume the resource is active. Clones
     * are not allowed to migrate, so role can't be promoted.
     */
    history->rsc->role = pcmk_role_started;

    // Check for migrate_from on the target
    target_migrate_from = find_lrm_op(history->rsc->id,
                                      PCMK_ACTION_MIGRATE_FROM, target, source,
                                      PCMK_OCF_OK, history->rsc->cluster);

    if (/* If the resource state is unknown on the target, it will likely be
         * probed there.
         * Don't just consider it running there. We will get back here anyway in
         * case the probe detects it's running there.
         */
        !unknown_on_node(history->rsc, target)
        /* If the resource has newer state on the target after the migration
         * events, this migrate_to no longer matters for the target.
         */
        && !newer_state_after_migrate(history->rsc->id, target, history->xml,
                                      target_migrate_from,
                                      history->rsc->cluster)) {
        /* The resource has no newer state on the target, so assume it's still
         * active there.
         * (if it is up).
         */
        pcmk_node_t *target_node = pe_find_node(history->rsc->cluster->nodes,
                                                target);

        if (target_node && target_node->details->online) {
            native_add_running(history->rsc, target_node, history->rsc->cluster,
                               FALSE);
        }

    } else if (!non_monitor_after(history->rsc->id, source, history->xml, true,
                                  history->rsc->cluster)) {
        /* We know the resource has newer state on the target, but this
         * migrate_to still matters for the source as long as there's no newer
         * non-monitor operation there.
         */

        // Mark node as having dangling migration so we can force a stop later
        history->rsc->dangling_migrations =
            g_list_prepend(history->rsc->dangling_migrations,
                           (gpointer) history->node);
    }
}

static void
unpack_migrate_from_failure(struct action_history *history)
{
    xmlNode *source_migrate_to = NULL;
    const char *source = NULL;
    const char *target = NULL;

    // Get source and target node names from XML
    if (get_migration_node_names(history->xml, NULL, history->node, &source,
                                 &target) != pcmk_rc_ok) {
        return;
    }

    /* If a migration failed, we have to assume the resource is active. Clones
     * are not allowed to migrate, so role can't be promoted.
     */
    history->rsc->role = pcmk_role_started;

    // Check for a migrate_to on the source
    source_migrate_to = find_lrm_op(history->rsc->id, PCMK_ACTION_MIGRATE_TO,
                                    source, target, PCMK_OCF_OK,
                                    history->rsc->cluster);

    if (/* If the resource state is unknown on the source, it will likely be
         * probed there.
         * Don't just consider it running there. We will get back here anyway in
         * case the probe detects it's running there.
         */
        !unknown_on_node(history->rsc, source)
        /* If the resource has newer state on the source after the migration
         * events, this migrate_from no longer matters for the source.
         */
        && !newer_state_after_migrate(history->rsc->id, source,
                                      source_migrate_to, history->xml,
                                      history->rsc->cluster)) {
        /* The resource has no newer state on the source, so assume it's still
         * active there (if it is up).
         */
        pcmk_node_t *source_node = pe_find_node(history->rsc->cluster->nodes,
                                                source);

        if (source_node && source_node->details->online) {
            native_add_running(history->rsc, source_node, history->rsc->cluster,
                               TRUE);
        }
    }
}

static void
record_failed_op(struct action_history *history)
{
    if (!(history->node->details->online)) {
        return;
    }

    for (const xmlNode *xIter = history->rsc->cluster->failed->children;
         xIter != NULL; xIter = xIter->next) {

        const char *key = pe__xe_history_key(xIter);
        const char *uname = crm_element_value(xIter, XML_ATTR_UNAME);

        if (pcmk__str_eq(history->key, key, pcmk__str_none)
            && pcmk__str_eq(uname, history->node->details->uname,
                            pcmk__str_casei)) {
            crm_trace("Skipping duplicate entry %s on %s",
                      history->key, pe__node_name(history->node));
            return;
        }
    }

    crm_trace("Adding entry for %s on %s to failed action list",
              history->key, pe__node_name(history->node));
    crm_xml_add(history->xml, XML_ATTR_UNAME, history->node->details->uname);
    crm_xml_add(history->xml, XML_LRM_ATTR_RSCID, history->rsc->id);
    add_node_copy(history->rsc->cluster->failed, history->xml);
}

static char *
last_change_str(const xmlNode *xml_op)
{
    time_t when;
    char *result = NULL;

    if (crm_element_value_epoch(xml_op, XML_RSC_OP_LAST_CHANGE,
                                &when) == pcmk_ok) {
        char *when_s = pcmk__epoch2str(&when, 0);
        const char *p = strchr(when_s, ' ');

        // Skip day of week to make message shorter
        if ((p != NULL) && (*(++p) != '\0')) {
            result = strdup(p);
            CRM_ASSERT(result != NULL);
        }
        free(when_s);
    }

    if (result == NULL) {
        result = strdup("unknown time");
        CRM_ASSERT(result != NULL);
    }

    return result;
}

static int
cmp_on_fail(enum action_fail_response first, enum action_fail_response second)
{
    switch (first) {
        case pcmk_on_fail_demote:
            switch (second) {
                case pcmk_on_fail_ignore:
                    return 1;
                case pcmk_on_fail_demote:
                    return 0;
                default:
                    return -1;
            }
            break;

        case pcmk_on_fail_reset_remote:
            switch (second) {
                case pcmk_on_fail_ignore:
                case pcmk_on_fail_demote:
                case pcmk_on_fail_restart:
                    return 1;
                case pcmk_on_fail_reset_remote:
                    return 0;
                default:
                    return -1;
            }
            break;

        case pcmk_on_fail_restart_container:
            switch (second) {
                case pcmk_on_fail_ignore:
                case pcmk_on_fail_demote:
                case pcmk_on_fail_restart:
                case pcmk_on_fail_reset_remote:
                    return 1;
                case pcmk_on_fail_restart_container:
                    return 0;
                default:
                    return -1;
            }
            break;

        default:
            break;
    }
    switch (second) {
        case pcmk_on_fail_demote:
            return (first == pcmk_on_fail_ignore)? -1 : 1;

        case pcmk_on_fail_reset_remote:
            switch (first) {
                case pcmk_on_fail_ignore:
                case pcmk_on_fail_demote:
                case pcmk_on_fail_restart:
                    return -1;
                default:
                    return 1;
            }
            break;

        case pcmk_on_fail_restart_container:
            switch (first) {
                case pcmk_on_fail_ignore:
                case pcmk_on_fail_demote:
                case pcmk_on_fail_restart:
                case pcmk_on_fail_reset_remote:
                    return -1;
                default:
                    return 1;
            }
            break;

        default:
            break;
    }
    return first - second;
}

static void
ban_from_all_nodes(pcmk_resource_t *rsc)
{
    int score = -INFINITY;
    pcmk_resource_t *fail_rsc = rsc;

    if (fail_rsc->parent != NULL) {
        pcmk_resource_t *parent = uber_parent(fail_rsc);

        if (pe_rsc_is_anon_clone(parent)) {
            /* For anonymous clones, if an operation with on-fail=stop fails for
             * any instance, the entire clone must stop.
             */
            fail_rsc = parent;
        }
    }

    // Ban the resource from all nodes
    crm_notice("%s will not be started under current conditions", fail_rsc->id);
    if (fail_rsc->allowed_nodes != NULL) {
        g_hash_table_destroy(fail_rsc->allowed_nodes);
    }
    fail_rsc->allowed_nodes = pe__node_list2table(rsc->cluster->nodes);
    g_hash_table_foreach(fail_rsc->allowed_nodes, set_node_score, &score);
}

static void
unpack_failure_handling(struct action_history *history,
                        enum action_fail_response *on_fail,
                        enum rsc_role_e *fail_role)
{
    xmlNode *config = pcmk__find_action_config(history->rsc, history->task,
                                               history->interval_ms, true);

    GHashTable *meta = pcmk__unpack_action_meta(history->rsc, history->node,
                                                history->task,
                                                history->interval_ms, config);

    const char *on_fail_str = g_hash_table_lookup(meta, XML_OP_ATTR_ON_FAIL);

    *on_fail = pcmk__parse_on_fail(history->rsc, history->task,
                                   history->interval_ms, on_fail_str);
    *fail_role = pcmk__role_after_failure(history->rsc, history->task, *on_fail,
                                          meta);
    g_hash_table_destroy(meta);
}

static void
unpack_rsc_op_failure(struct action_history *history,
                      enum action_fail_response config_on_fail,
                      enum rsc_role_e fail_role, xmlNode **last_failure,
                      enum action_fail_response *on_fail)
{
    bool is_probe = false;
    char *last_change_s = NULL;

    *last_failure = history->xml;

    is_probe = pcmk_xe_is_probe(history->xml);
    last_change_s = last_change_str(history->xml);

    if (!pcmk_is_set(history->rsc->cluster->flags, pcmk_sched_symmetric_cluster)
        && (history->exit_status == PCMK_OCF_NOT_INSTALLED)) {
        crm_trace("Unexpected result (%s%s%s) was recorded for "
                  "%s of %s on %s at %s " CRM_XS " exit-status=%d id=%s",
                  services_ocf_exitcode_str(history->exit_status),
                  (pcmk__str_empty(history->exit_reason)? "" : ": "),
                  pcmk__s(history->exit_reason, ""),
                  (is_probe? "probe" : history->task), history->rsc->id,
                  pe__node_name(history->node), last_change_s,
                  history->exit_status, history->id);
    } else {
        crm_warn("Unexpected result (%s%s%s) was recorded for "
                  "%s of %s on %s at %s " CRM_XS " exit-status=%d id=%s",
                 services_ocf_exitcode_str(history->exit_status),
                 (pcmk__str_empty(history->exit_reason)? "" : ": "),
                 pcmk__s(history->exit_reason, ""),
                 (is_probe? "probe" : history->task), history->rsc->id,
                 pe__node_name(history->node), last_change_s,
                 history->exit_status, history->id);

        if (is_probe && (history->exit_status != PCMK_OCF_OK)
            && (history->exit_status != PCMK_OCF_NOT_RUNNING)
            && (history->exit_status != PCMK_OCF_RUNNING_PROMOTED)) {

            /* A failed (not just unexpected) probe result could mean the user
             * didn't know resources will be probed even where they can't run.
             */
            crm_notice("If it is not possible for %s to run on %s, see "
                       "the resource-discovery option for location constraints",
                       history->rsc->id, pe__node_name(history->node));
        }

        record_failed_op(history);
    }

    free(last_change_s);

    if (cmp_on_fail(*on_fail, config_on_fail) < 0) {
        pe_rsc_trace(history->rsc, "on-fail %s -> %s for %s",
                     fail2text(*on_fail), fail2text(config_on_fail),
                     history->key);
        *on_fail = config_on_fail;
    }

    if (strcmp(history->task, PCMK_ACTION_STOP) == 0) {
        resource_location(history->rsc, history->node, -INFINITY,
                          "__stop_fail__", history->rsc->cluster);

    } else if (strcmp(history->task, PCMK_ACTION_MIGRATE_TO) == 0) {
        unpack_migrate_to_failure(history);

    } else if (strcmp(history->task, PCMK_ACTION_MIGRATE_FROM) == 0) {
        unpack_migrate_from_failure(history);

    } else if (strcmp(history->task, PCMK_ACTION_PROMOTE) == 0) {
        history->rsc->role = pcmk_role_promoted;

    } else if (strcmp(history->task, PCMK_ACTION_DEMOTE) == 0) {
        if (config_on_fail == pcmk_on_fail_block) {
            history->rsc->role = pcmk_role_promoted;
            pe__set_next_role(history->rsc, pcmk_role_stopped,
                              "demote with on-fail=block");

        } else if (history->exit_status == PCMK_OCF_NOT_RUNNING) {
            history->rsc->role = pcmk_role_stopped;

        } else {
            /* Staying in the promoted role would put the scheduler and
             * controller into a loop. Setting the role to unpromoted is not
             * dangerous because the resource will be stopped as part of
             * recovery, and any promotion will be ordered after that stop.
             */
            history->rsc->role = pcmk_role_unpromoted;
        }
    }

    if (is_probe && (history->exit_status == PCMK_OCF_NOT_INSTALLED)) {
        /* leave stopped */
        pe_rsc_trace(history->rsc, "Leaving %s stopped", history->rsc->id);
        history->rsc->role = pcmk_role_stopped;

    } else if (history->rsc->role < pcmk_role_started) {
        pe_rsc_trace(history->rsc, "Setting %s active", history->rsc->id);
        set_active(history->rsc);
    }

    pe_rsc_trace(history->rsc,
                 "Resource %s: role=%s, unclean=%s, on_fail=%s, fail_role=%s",
                 history->rsc->id, role2text(history->rsc->role),
                 pcmk__btoa(history->node->details->unclean),
                 fail2text(config_on_fail), role2text(fail_role));

    if ((fail_role != pcmk_role_started)
        && (history->rsc->next_role < fail_role)) {
        pe__set_next_role(history->rsc, fail_role, "failure");
    }

    if (fail_role == pcmk_role_stopped) {
        ban_from_all_nodes(history->rsc);
    }
}

static void
block_if_unrecoverable(struct action_history *history)
{
    char *last_change_s = NULL;

    if (strcmp(history->task, PCMK_ACTION_STOP) != 0) {
        return; // All actions besides stop are always recoverable
    }
    if (pe_can_fence(history->node->details->data_set, history->node)) {
        return; // Failed stops are recoverable via fencing
    }

    last_change_s = last_change_str(history->xml);
    pe_proc_err("No further recovery can be attempted for %s "
                "because %s on %s failed (%s%s%s) at %s "
                CRM_XS " rc=%d id=%s",
                history->rsc->id, history->task, pe__node_name(history->node),
                services_ocf_exitcode_str(history->exit_status),
                (pcmk__str_empty(history->exit_reason)? "" : ": "),
                pcmk__s(history->exit_reason, ""),
                last_change_s, history->exit_status, history->id);

    free(last_change_s);

    pe__clear_resource_flags(history->rsc, pcmk_rsc_managed);
    pe__set_resource_flags(history->rsc, pcmk_rsc_blocked);
}

static inline void
remap_because(struct action_history *history, const char **why, int value,
              const char *reason)
{
    if (history->execution_status != value) {
        history->execution_status = value;
        *why = reason;
    }
}

static void
remap_operation(struct action_history *history,
                enum action_fail_response *on_fail, bool expired)
{
    bool is_probe = false;
    int orig_exit_status = history->exit_status;
    int orig_exec_status = history->execution_status;
    const char *why = NULL;
    const char *task = history->task;

    // Remap degraded results to their successful counterparts
    history->exit_status = pcmk__effective_rc(history->exit_status);
    if (history->exit_status != orig_exit_status) {
        why = "degraded result";
        if (!expired && (!history->node->details->shutdown
                         || history->node->details->online)) {
            record_failed_op(history);
        }
    }

    if (!pe_rsc_is_bundled(history->rsc)
        && pcmk_xe_mask_probe_failure(history->xml)
        && ((history->execution_status != PCMK_EXEC_DONE)
            || (history->exit_status != PCMK_OCF_NOT_RUNNING))) {
        history->execution_status = PCMK_EXEC_DONE;
        history->exit_status = PCMK_OCF_NOT_RUNNING;
        why = "equivalent probe result";
    }

    /* If the executor reported an execution status of anything but done or
     * error, consider that final. But for done or error, we know better whether
     * it should be treated as a failure or not, because we know the expected
     * result.
     */
    switch (history->execution_status) {
        case PCMK_EXEC_DONE:
        case PCMK_EXEC_ERROR:
            break;

        // These should be treated as node-fatal
        case PCMK_EXEC_NO_FENCE_DEVICE:
        case PCMK_EXEC_NO_SECRETS:
            remap_because(history, &why, PCMK_EXEC_ERROR_HARD,
                          "node-fatal error");
            goto remap_done;

        default:
            goto remap_done;
    }

    is_probe = pcmk_xe_is_probe(history->xml);
    if (is_probe) {
        task = "probe";
    }

    if (history->expected_exit_status < 0) {
        /* Pre-1.0 Pacemaker versions, and Pacemaker 1.1.6 or earlier with
         * Heartbeat 2.0.7 or earlier as the cluster layer, did not include the
         * expected exit status in the transition key, which (along with the
         * similar case of a corrupted transition key in the CIB) will be
         * reported to this function as -1. Pacemaker 2.0+ does not support
         * rolling upgrades from those versions or processing of saved CIB files
         * from those versions, so we do not need to care much about this case.
         */
        remap_because(history, &why, PCMK_EXEC_ERROR,
                      "obsolete history format");
        crm_warn("Expected result not found for %s on %s "
                 "(corrupt or obsolete CIB?)",
                 history->key, pe__node_name(history->node));

    } else if (history->exit_status == history->expected_exit_status) {
        remap_because(history, &why, PCMK_EXEC_DONE, "expected result");

    } else {
        remap_because(history, &why, PCMK_EXEC_ERROR, "unexpected result");
        pe_rsc_debug(history->rsc,
                     "%s on %s: expected %d (%s), got %d (%s%s%s)",
                     history->key, pe__node_name(history->node),
                     history->expected_exit_status,
                     services_ocf_exitcode_str(history->expected_exit_status),
                     history->exit_status,
                     services_ocf_exitcode_str(history->exit_status),
                     (pcmk__str_empty(history->exit_reason)? "" : ": "),
                     pcmk__s(history->exit_reason, ""));
    }

    switch (history->exit_status) {
        case PCMK_OCF_OK:
            if (is_probe
                && (history->expected_exit_status == PCMK_OCF_NOT_RUNNING)) {
                char *last_change_s = last_change_str(history->xml);

                remap_because(history, &why, PCMK_EXEC_DONE, "probe");
                pe_rsc_info(history->rsc, "Probe found %s active on %s at %s",
                            history->rsc->id, pe__node_name(history->node),
                            last_change_s);
                free(last_change_s);
            }
            break;

        case PCMK_OCF_NOT_RUNNING:
            if (is_probe
                || (history->expected_exit_status == history->exit_status)
                || !pcmk_is_set(history->rsc->flags, pcmk_rsc_managed)) {

                /* For probes, recurring monitors for the Stopped role, and
                 * unmanaged resources, "not running" is not considered a
                 * failure.
                 */
                remap_because(history, &why, PCMK_EXEC_DONE, "exit status");
                history->rsc->role = pcmk_role_stopped;
                *on_fail = pcmk_on_fail_ignore;
                pe__set_next_role(history->rsc, pcmk_role_unknown,
                                  "not running");
            }
            break;

        case PCMK_OCF_RUNNING_PROMOTED:
            if (is_probe
                && (history->exit_status != history->expected_exit_status)) {
                char *last_change_s = last_change_str(history->xml);

                remap_because(history, &why, PCMK_EXEC_DONE, "probe");
                pe_rsc_info(history->rsc,
                            "Probe found %s active and promoted on %s at %s",
                            history->rsc->id, pe__node_name(history->node),
                            last_change_s);
                free(last_change_s);
            }
            if (!expired
                || (history->exit_status == history->expected_exit_status)) {
                history->rsc->role = pcmk_role_promoted;
            }
            break;

        case PCMK_OCF_FAILED_PROMOTED:
            if (!expired) {
                history->rsc->role = pcmk_role_promoted;
            }
            remap_because(history, &why, PCMK_EXEC_ERROR, "exit status");
            break;

        case PCMK_OCF_NOT_CONFIGURED:
            remap_because(history, &why, PCMK_EXEC_ERROR_FATAL, "exit status");
            break;

        case PCMK_OCF_UNIMPLEMENT_FEATURE:
            {
                guint interval_ms = 0;
                crm_element_value_ms(history->xml, XML_LRM_ATTR_INTERVAL_MS,
                                     &interval_ms);

                if (interval_ms == 0) {
                    if (!expired) {
                        block_if_unrecoverable(history);
                    }
                    remap_because(history, &why, PCMK_EXEC_ERROR_HARD,
                                  "exit status");
                } else {
                    remap_because(history, &why, PCMK_EXEC_NOT_SUPPORTED,
                                  "exit status");
                }
            }
            break;

        case PCMK_OCF_NOT_INSTALLED:
        case PCMK_OCF_INVALID_PARAM:
        case PCMK_OCF_INSUFFICIENT_PRIV:
            if (!expired) {
                block_if_unrecoverable(history);
            }
            remap_because(history, &why, PCMK_EXEC_ERROR_HARD, "exit status");
            break;

        default:
            if (history->execution_status == PCMK_EXEC_DONE) {
                char *last_change_s = last_change_str(history->xml);

                crm_info("Treating unknown exit status %d from %s of %s "
                         "on %s at %s as failure",
                         history->exit_status, task, history->rsc->id,
                         pe__node_name(history->node), last_change_s);
                remap_because(history, &why, PCMK_EXEC_ERROR,
                              "unknown exit status");
                free(last_change_s);
            }
            break;
    }

remap_done:
    if (why != NULL) {
        pe_rsc_trace(history->rsc,
                     "Remapped %s result from [%s: %s] to [%s: %s] "
                     "because of %s",
                     history->key, pcmk_exec_status_str(orig_exec_status),
                     crm_exit_str(orig_exit_status),
                     pcmk_exec_status_str(history->execution_status),
                     crm_exit_str(history->exit_status), why);
    }
}

// return TRUE if start or monitor last failure but parameters changed
static bool
should_clear_for_param_change(const xmlNode *xml_op, const char *task,
                              pcmk_resource_t *rsc, pcmk_node_t *node)
{
    if (pcmk__str_any_of(task, PCMK_ACTION_START, PCMK_ACTION_MONITOR, NULL)) {
        if (pe__bundle_needs_remote_name(rsc)) {
            /* We haven't allocated resources yet, so we can't reliably
             * substitute addr parameters for the REMOTE_CONTAINER_HACK.
             * When that's needed, defer the check until later.
             */
            pe__add_param_check(xml_op, rsc, node, pcmk__check_last_failure,
                                rsc->cluster);

        } else {
            op_digest_cache_t *digest_data = NULL;

            digest_data = rsc_action_digest_cmp(rsc, xml_op, node,
                                                rsc->cluster);
            switch (digest_data->rc) {
                case pcmk__digest_unknown:
                    crm_trace("Resource %s history entry %s on %s"
                              " has no digest to compare",
                              rsc->id, pe__xe_history_key(xml_op),
                              node->details->id);
                    break;
                case pcmk__digest_match:
                    break;
                default:
                    return TRUE;
            }
        }
    }
    return FALSE;
}

// Order action after fencing of remote node, given connection rsc
static void
order_after_remote_fencing(pcmk_action_t *action, pcmk_resource_t *remote_conn,
                           pcmk_scheduler_t *scheduler)
{
    pcmk_node_t *remote_node = pe_find_node(scheduler->nodes, remote_conn->id);

    if (remote_node) {
        pcmk_action_t *fence = pe_fence_op(remote_node, NULL, TRUE, NULL,
                                           FALSE, scheduler);

        order_actions(fence, action, pcmk__ar_first_implies_then);
    }
}

static bool
should_ignore_failure_timeout(const pcmk_resource_t *rsc, const char *task,
                              guint interval_ms, bool is_last_failure)
{
    /* Clearing failures of recurring monitors has special concerns. The
     * executor reports only changes in the monitor result, so if the
     * monitor is still active and still getting the same failure result,
     * that will go undetected after the failure is cleared.
     *
     * Also, the operation history will have the time when the recurring
     * monitor result changed to the given code, not the time when the
     * result last happened.
     *
     * @TODO We probably should clear such failures only when the failure
     * timeout has passed since the last occurrence of the failed result.
     * However we don't record that information. We could maybe approximate
     * that by clearing only if there is a more recent successful monitor or
     * stop result, but we don't even have that information at this point
     * since we are still unpacking the resource's operation history.
     *
     * This is especially important for remote connection resources with a
     * reconnect interval, so in that case, we skip clearing failures
     * if the remote node hasn't been fenced.
     */
    if (rsc->remote_reconnect_ms
        && pcmk_is_set(rsc->cluster->flags, pcmk_sched_fencing_enabled)
        && (interval_ms != 0)
        && pcmk__str_eq(task, PCMK_ACTION_MONITOR, pcmk__str_casei)) {

        pcmk_node_t *remote_node = pe_find_node(rsc->cluster->nodes, rsc->id);

        if (remote_node && !remote_node->details->remote_was_fenced) {
            if (is_last_failure) {
                crm_info("Waiting to clear monitor failure for remote node %s"
                         " until fencing has occurred", rsc->id);
            }
            return TRUE;
        }
    }
    return FALSE;
}

static bool
check_operation_expiry(struct action_history *history)
{
    bool expired = false;
    bool is_last_failure = pcmk__ends_with(history->id, "_last_failure_0");
    time_t last_run = 0;
    int unexpired_fail_count = 0;
    const char *clear_reason = NULL;

    if (history->execution_status == PCMK_EXEC_NOT_INSTALLED) {
        pe_rsc_trace(history->rsc,
                     "Resource history entry %s on %s is not expired: "
                     "Not Installed does not expire",
                     history->id, pe__node_name(history->node));
        return false; // "Not installed" must always be cleared manually
    }

    if ((history->rsc->failure_timeout > 0)
        && (crm_element_value_epoch(history->xml, XML_RSC_OP_LAST_CHANGE,
                                    &last_run) == 0)) {

        // Resource has a failure-timeout, and history entry has a timestamp

        time_t now = get_effective_time(history->rsc->cluster);
        time_t last_failure = 0;

        // Is this particular operation history older than the failure timeout?
        if ((now >= (last_run + history->rsc->failure_timeout))
            && !should_ignore_failure_timeout(history->rsc, history->task,
                                              history->interval_ms,
                                              is_last_failure)) {
            expired = true;
        }

        // Does the resource as a whole have an unexpired fail count?
        unexpired_fail_count = pe_get_failcount(history->node, history->rsc,
                                                &last_failure,
                                                pcmk__fc_effective,
                                                history->xml);

        // Update scheduler recheck time according to *last* failure
        crm_trace("%s@%lld is %sexpired @%lld with unexpired_failures=%d timeout=%ds"
                  " last-failure@%lld",
                  history->id, (long long) last_run, (expired? "" : "not "),
                  (long long) now, unexpired_fail_count,
                  history->rsc->failure_timeout, (long long) last_failure);
        last_failure += history->rsc->failure_timeout + 1;
        if (unexpired_fail_count && (now < last_failure)) {
            pe__update_recheck_time(last_failure, history->rsc->cluster,
                                    "fail count expiration");
        }
    }

    if (expired) {
        if (pe_get_failcount(history->node, history->rsc, NULL,
                             pcmk__fc_default, history->xml)) {
            // There is a fail count ignoring timeout

            if (unexpired_fail_count == 0) {
                // There is no fail count considering timeout
                clear_reason = "it expired";

            } else {
                /* This operation is old, but there is an unexpired fail count.
                 * In a properly functioning cluster, this should only be
                 * possible if this operation is not a failure (otherwise the
                 * fail count should be expired too), so this is really just a
                 * failsafe.
                 */
                pe_rsc_trace(history->rsc,
                             "Resource history entry %s on %s is not expired: "
                             "Unexpired fail count",
                             history->id, pe__node_name(history->node));
                expired = false;
            }

        } else if (is_last_failure
                   && (history->rsc->remote_reconnect_ms != 0)) {
            /* Clear any expired last failure when reconnect interval is set,
             * even if there is no fail count.
             */
            clear_reason = "reconnect interval is set";
        }
    }

    if (!expired && is_last_failure
        && should_clear_for_param_change(history->xml, history->task,
                                         history->rsc, history->node)) {
        clear_reason = "resource parameters have changed";
    }

    if (clear_reason != NULL) {
        pcmk_action_t *clear_op = NULL;

        // Schedule clearing of the fail count
        clear_op = pe__clear_failcount(history->rsc, history->node,
                                       clear_reason, history->rsc->cluster);

        if (pcmk_is_set(history->rsc->cluster->flags,
                        pcmk_sched_fencing_enabled)
            && (history->rsc->remote_reconnect_ms != 0)) {
            /* If we're clearing a remote connection due to a reconnect
             * interval, we want to wait until any scheduled fencing
             * completes.
             *
             * We could limit this to remote_node->details->unclean, but at
             * this point, that's always true (it won't be reliable until
             * after unpack_node_history() is done).
             */
            crm_info("Clearing %s failure will wait until any scheduled "
                     "fencing of %s completes",
                     history->task, history->rsc->id);
            order_after_remote_fencing(clear_op, history->rsc,
                                       history->rsc->cluster);
        }
    }

    if (expired && (history->interval_ms == 0)
        && pcmk__str_eq(history->task, PCMK_ACTION_MONITOR, pcmk__str_none)) {
        switch (history->exit_status) {
            case PCMK_OCF_OK:
            case PCMK_OCF_NOT_RUNNING:
            case PCMK_OCF_RUNNING_PROMOTED:
            case PCMK_OCF_DEGRADED:
            case PCMK_OCF_DEGRADED_PROMOTED:
                // Don't expire probes that return these values
                pe_rsc_trace(history->rsc,
                             "Resource history entry %s on %s is not expired: "
                             "Probe result",
                             history->id, pe__node_name(history->node));
                expired = false;
                break;
        }
    }

    return expired;
}

int
pe__target_rc_from_xml(const xmlNode *xml_op)
{
    int target_rc = 0;
    const char *key = crm_element_value(xml_op, XML_ATTR_TRANSITION_KEY);

    if (key == NULL) {
        return -1;
    }
    decode_transition_key(key, NULL, NULL, NULL, &target_rc);
    return target_rc;
}

static void
update_resource_state(struct action_history *history, int exit_status,
                      const xmlNode *last_failure,
                      enum action_fail_response *on_fail)
{
    bool clear_past_failure = false;

    if ((exit_status == PCMK_OCF_NOT_INSTALLED)
        || (!pe_rsc_is_bundled(history->rsc)
            && pcmk_xe_mask_probe_failure(history->xml))) {
        history->rsc->role = pcmk_role_stopped;

    } else if (exit_status == PCMK_OCF_NOT_RUNNING) {
        clear_past_failure = true;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_MONITOR,
                            pcmk__str_none)) {
        if ((last_failure != NULL)
            && pcmk__str_eq(history->key, pe__xe_history_key(last_failure),
                            pcmk__str_none)) {
            clear_past_failure = true;
        }
        if (history->rsc->role < pcmk_role_started) {
            set_active(history->rsc);
        }

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_START, pcmk__str_none)) {
        history->rsc->role = pcmk_role_started;
        clear_past_failure = true;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_STOP, pcmk__str_none)) {
        history->rsc->role = pcmk_role_stopped;
        clear_past_failure = true;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_PROMOTE,
                            pcmk__str_none)) {
        history->rsc->role = pcmk_role_promoted;
        clear_past_failure = true;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_DEMOTE,
                            pcmk__str_none)) {
        if (*on_fail == pcmk_on_fail_demote) {
            // Demote clears an error only if on-fail=demote
            clear_past_failure = true;
        }
        history->rsc->role = pcmk_role_unpromoted;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_MIGRATE_FROM,
                            pcmk__str_none)) {
        history->rsc->role = pcmk_role_started;
        clear_past_failure = true;

    } else if (pcmk__str_eq(history->task, PCMK_ACTION_MIGRATE_TO,
                            pcmk__str_none)) {
        unpack_migrate_to_success(history);

    } else if (history->rsc->role < pcmk_role_started) {
        pe_rsc_trace(history->rsc, "%s active on %s",
                     history->rsc->id, pe__node_name(history->node));
        set_active(history->rsc);
    }

    if (!clear_past_failure) {
        return;
    }

    switch (*on_fail) {
        case pcmk_on_fail_stop:
        case pcmk_on_fail_ban:
        case pcmk_on_fail_standby_node:
        case pcmk_on_fail_fence_node:
            pe_rsc_trace(history->rsc,
                         "%s (%s) is not cleared by a completed %s",
                         history->rsc->id, fail2text(*on_fail), history->task);
            break;

        case pcmk_on_fail_block:
        case pcmk_on_fail_ignore:
        case pcmk_on_fail_demote:
        case pcmk_on_fail_restart:
        case pcmk_on_fail_restart_container:
            *on_fail = pcmk_on_fail_ignore;
            pe__set_next_role(history->rsc, pcmk_role_unknown,
                              "clear past failures");
            break;

        case pcmk_on_fail_reset_remote:
            if (history->rsc->remote_reconnect_ms == 0) {
                /* With no reconnect interval, the connection is allowed to
                 * start again after the remote node is fenced and
                 * completely stopped. (With a reconnect interval, we wait
                 * for the failure to be cleared entirely before attempting
                 * to reconnect.)
                 */
                *on_fail = pcmk_on_fail_ignore;
                pe__set_next_role(history->rsc, pcmk_role_unknown,
                                  "clear past failures and reset remote");
            }
            break;
    }
}

static inline bool
can_affect_state(struct action_history *history)
{
#if 0
    /* @COMPAT It might be better to parse only actions we know we're interested
     * in, rather than exclude a couple we don't. However that would be a
     * behavioral change that should be done at a major or minor series release.
     * Currently, unknown operations can affect whether a resource is considered
     * active and/or failed.
     */
     return pcmk__str_any_of(history->task, PCMK_ACTION_MONITOR,
                             PCMK_ACTION_START, PCMK_ACTION_STOP,
                             PCMK_ACTION_PROMOTE, PCMK_ACTION_DEMOTE,
                             PCMK_ACTION_MIGRATE_TO, PCMK_ACTION_MIGRATE_FROM,
                             "asyncmon", NULL);
#else
     return !pcmk__str_any_of(history->task, PCMK_ACTION_NOTIFY,
                              PCMK_ACTION_META_DATA, NULL);
#endif
}

static int
unpack_action_result(struct action_history *history)
{
    if ((crm_element_value_int(history->xml, XML_LRM_ATTR_OPSTATUS,
                               &(history->execution_status)) < 0)
        || (history->execution_status < PCMK_EXEC_PENDING)
        || (history->execution_status > PCMK_EXEC_MAX)
        || (history->execution_status == PCMK_EXEC_CANCELLED)) {
        crm_err("Ignoring resource history entry %s for %s on %s "
                "with invalid " XML_LRM_ATTR_OPSTATUS " '%s'",
                history->id, history->rsc->id, pe__node_name(history->node),
                pcmk__s(crm_element_value(history->xml, XML_LRM_ATTR_OPSTATUS),
                        ""));
        return pcmk_rc_unpack_error;
    }
    if ((crm_element_value_int(history->xml, XML_LRM_ATTR_RC,
                               &(history->exit_status)) < 0)
        || (history->exit_status < 0) || (history->exit_status > CRM_EX_MAX)) {
#if 0
        /* @COMPAT We should ignore malformed entries, but since that would
         * change behavior, it should be done at a major or minor series
         * release.
         */
        crm_err("Ignoring resource history entry %s for %s on %s "
                "with invalid " XML_LRM_ATTR_RC " '%s'",
                history->id, history->rsc->id, pe__node_name(history->node),
                pcmk__s(crm_element_value(history->xml, XML_LRM_ATTR_RC),
                        ""));
        return pcmk_rc_unpack_error;
#else
        history->exit_status = CRM_EX_ERROR;
#endif
    }
    history->exit_reason = crm_element_value(history->xml,
                                             XML_LRM_ATTR_EXIT_REASON);
    return pcmk_rc_ok;
}

static int
process_expired_result(struct action_history *history, int orig_exit_status)
{
    if (!pe_rsc_is_bundled(history->rsc)
        && pcmk_xe_mask_probe_failure(history->xml)
        && (orig_exit_status != history->expected_exit_status)) {

        if (history->rsc->role <= pcmk_role_stopped) {
            history->rsc->role = pcmk_role_unknown;
        }
        crm_trace("Ignoring resource history entry %s for probe of %s on %s: "
                  "Masked failure expired",
                  history->id, history->rsc->id,
                  pe__node_name(history->node));
        return pcmk_rc_ok;
    }

    if (history->exit_status == history->expected_exit_status) {
        return pcmk_rc_undetermined; // Only failures expire
    }

    if (history->interval_ms == 0) {
        crm_notice("Ignoring resource history entry %s for %s of %s on %s: "
                   "Expired failure",
                   history->id, history->task, history->rsc->id,
                   pe__node_name(history->node));
        return pcmk_rc_ok;
    }

    if (history->node->details->online && !history->node->details->unclean) {
        /* Reschedule the recurring action. schedule_cancel() won't work at
         * this stage, so as a hacky workaround, forcibly change the restart
         * digest so pcmk__check_action_config() does what we want later.
         *
         * @TODO We should skip this if there is a newer successful monitor.
         *       Also, this causes rescheduling only if the history entry
         *       has an op-digest (which the expire-non-blocked-failure
         *       scheduler regression test doesn't, but that may not be a
         *       realistic scenario in production).
         */
        crm_notice("Rescheduling %s-interval %s of %s on %s "
                   "after failure expired",
                   pcmk__readable_interval(history->interval_ms), history->task,
                   history->rsc->id, pe__node_name(history->node));
        crm_xml_add(history->xml, XML_LRM_ATTR_RESTART_DIGEST,
                    "calculated-failure-timeout");
        return pcmk_rc_ok;
    }

    return pcmk_rc_undetermined;
}

static void
mask_probe_failure(struct action_history *history, int orig_exit_status,
                   const xmlNode *last_failure,
                   enum action_fail_response *on_fail)
{
    pcmk_resource_t *ban_rsc = history->rsc;

    if (!pcmk_is_set(history->rsc->flags, pcmk_rsc_unique)) {
        ban_rsc = uber_parent(history->rsc);
    }

    crm_notice("Treating probe result '%s' for %s on %s as 'not running'",
               services_ocf_exitcode_str(orig_exit_status), history->rsc->id,
               pe__node_name(history->node));
    update_resource_state(history, history->expected_exit_status, last_failure,
                          on_fail);
    crm_xml_add(history->xml, XML_ATTR_UNAME, history->node->details->uname);

    record_failed_op(history);
    resource_location(ban_rsc, history->node, -INFINITY, "masked-probe-failure",
                      history->rsc->cluster);
}

static bool
failure_is_newer(const struct action_history *history,
                 const xmlNode *last_failure)
{
    guint failure_interval_ms = 0U;
    long long failure_change = 0LL;
    long long this_change = 0LL;

    if (last_failure == NULL) {
        return false; // Resource has no last_failure entry
    }

    if (!pcmk__str_eq(history->task,
                      crm_element_value(last_failure, XML_LRM_ATTR_TASK),
                      pcmk__str_none)) {
        return false; // last_failure is for different action
    }

    if ((crm_element_value_ms(last_failure, XML_LRM_ATTR_INTERVAL_MS,
                              &failure_interval_ms) != pcmk_ok)
        || (history->interval_ms != failure_interval_ms)) {
        return false; // last_failure is for action with different interval
    }

    if ((pcmk__scan_ll(crm_element_value(history->xml, XML_RSC_OP_LAST_CHANGE),
                       &this_change, 0LL) != pcmk_rc_ok)
        || (pcmk__scan_ll(crm_element_value(last_failure,
                                            XML_RSC_OP_LAST_CHANGE),
                          &failure_change, 0LL) != pcmk_rc_ok)
        || (failure_change < this_change)) {
        return false; // Failure is not known to be newer
    }

    return true;
}

static void
process_pending_action(struct action_history *history,
                       const xmlNode *last_failure)
{
    /* For recurring monitors, a failure is recorded only in RSC_last_failure_0,
     * and there might be a RSC_monitor_INTERVAL entry with the last successful
     * or pending result.
     *
     * If last_failure contains the failure of the pending recurring monitor
     * we're processing here, and is newer, the action is no longer pending.
     * (Pending results have call ID -1, which sorts last, so the last failure
     * if any should be known.)
     */
    if (failure_is_newer(history, last_failure)) {
        return;
    }

    if (strcmp(history->task, PCMK_ACTION_START) == 0) {
        pe__set_resource_flags(history->rsc, pcmk_rsc_start_pending);
        set_active(history->rsc);

    } else if (strcmp(history->task, PCMK_ACTION_PROMOTE) == 0) {
        history->rsc->role = pcmk_role_promoted;

    } else if ((strcmp(history->task, PCMK_ACTION_MIGRATE_TO) == 0)
               && history->node->details->unclean) {
        /* A migrate_to action is pending on a unclean source, so force a stop
         * on the target.
         */
        const char *migrate_target = NULL;
        pcmk_node_t *target = NULL;

        migrate_target = crm_element_value(history->xml,
                                           XML_LRM_ATTR_MIGRATE_TARGET);
        target = pe_find_node(history->rsc->cluster->nodes, migrate_target);
        if (target != NULL) {
            stop_action(history->rsc, target, FALSE);
        }
    }

    if (history->rsc->pending_task != NULL) {
        /* There should never be multiple pending actions, but as a failsafe,
         * just remember the first one processed for display purposes.
         */
        return;
    }

    if (pcmk_is_probe(history->task, history->interval_ms)) {
        /* Pending probes are currently never displayed, even if pending
         * operations are requested. If we ever want to change that,
         * enable the below and the corresponding part of
         * native.c:native_pending_task().
         */
#if 0
        history->rsc->pending_task = strdup("probe");
        history->rsc->pending_node = history->node;
#endif
    } else {
        history->rsc->pending_task = strdup(history->task);
        history->rsc->pending_node = history->node;
    }
}

static void
unpack_rsc_op(pcmk_resource_t *rsc, pcmk_node_t *node, xmlNode *xml_op,
              xmlNode **last_failure, enum action_fail_response *on_fail)
{
    int old_rc = 0;
    bool expired = false;
    pcmk_resource_t *parent = rsc;
    enum rsc_role_e fail_role = pcmk_role_unknown;
    enum action_fail_response failure_strategy = pcmk_on_fail_restart;

    struct action_history history = {
        .rsc = rsc,
        .node = node,
        .xml = xml_op,
        .execution_status = PCMK_EXEC_UNKNOWN,
    };

    CRM_CHECK(rsc && node && xml_op, return);

    history.id = ID(xml_op);
    if (history.id == NULL) {
        crm_err("Ignoring resource history entry for %s on %s without ID",
                rsc->id, pe__node_name(node));
        return;
    }

    // Task and interval
    history.task = crm_element_value(xml_op, XML_LRM_ATTR_TASK);
    if (history.task == NULL) {
        crm_err("Ignoring resource history entry %s for %s on %s without "
                XML_LRM_ATTR_TASK, history.id, rsc->id, pe__node_name(node));
        return;
    }
    crm_element_value_ms(xml_op, XML_LRM_ATTR_INTERVAL_MS,
                         &(history.interval_ms));
    if (!can_affect_state(&history)) {
        pe_rsc_trace(rsc,
                     "Ignoring resource history entry %s for %s on %s "
                     "with irrelevant action '%s'",
                     history.id, rsc->id, pe__node_name(node), history.task);
        return;
    }

    if (unpack_action_result(&history) != pcmk_rc_ok) {
        return; // Error already logged
    }

    history.expected_exit_status = pe__target_rc_from_xml(xml_op);
    history.key = pe__xe_history_key(xml_op);
    crm_element_value_int(xml_op, XML_LRM_ATTR_CALLID, &(history.call_id));

    pe_rsc_trace(rsc, "Unpacking %s (%s call %d on %s): %s (%s)",
                 history.id, history.task, history.call_id, pe__node_name(node),
                 pcmk_exec_status_str(history.execution_status),
                 crm_exit_str(history.exit_status));

    if (node->details->unclean) {
        pe_rsc_trace(rsc,
                     "%s is running on %s, which is unclean (further action "
                     "depends on value of stop's on-fail attribute)",
                     rsc->id, pe__node_name(node));
    }

    expired = check_operation_expiry(&history);
    old_rc = history.exit_status;

    remap_operation(&history, on_fail, expired);

    if (expired && (process_expired_result(&history, old_rc) == pcmk_rc_ok)) {
        goto done;
    }

    if (!pe_rsc_is_bundled(rsc) && pcmk_xe_mask_probe_failure(xml_op)) {
        mask_probe_failure(&history, old_rc, *last_failure, on_fail);
        goto done;
    }

    if (!pcmk_is_set(rsc->flags, pcmk_rsc_unique)) {
        parent = uber_parent(rsc);
    }

    switch (history.execution_status) {
        case PCMK_EXEC_PENDING:
            process_pending_action(&history, *last_failure);
            goto done;

        case PCMK_EXEC_DONE:
            update_resource_state(&history, history.exit_status, *last_failure,
                                  on_fail);
            goto done;

        case PCMK_EXEC_NOT_INSTALLED:
            unpack_failure_handling(&history, &failure_strategy, &fail_role);
            if (failure_strategy == pcmk_on_fail_ignore) {
                crm_warn("Cannot ignore failed %s of %s on %s: "
                         "Resource agent doesn't exist "
                         CRM_XS " status=%d rc=%d id=%s",
                         history.task, rsc->id, pe__node_name(node),
                         history.execution_status, history.exit_status,
                         history.id);
                /* Also for printing it as "FAILED" by marking it as
                 * pcmk_rsc_failed later
                 */
                *on_fail = pcmk_on_fail_ban;
            }
            resource_location(parent, node, -INFINITY, "hard-error",
                              rsc->cluster);
            unpack_rsc_op_failure(&history, failure_strategy, fail_role,
                                  last_failure, on_fail);
            goto done;

        case PCMK_EXEC_NOT_CONNECTED:
            if (pe__is_guest_or_remote_node(node)
                && pcmk_is_set(node->details->remote_rsc->flags,
                               pcmk_rsc_managed)) {
                /* We should never get into a situation where a managed remote
                 * connection resource is considered OK but a resource action
                 * behind the connection gets a "not connected" status. But as a
                 * fail-safe in case a bug or unusual circumstances do lead to
                 * that, ensure the remote connection is considered failed.
                 */
                pe__set_resource_flags(node->details->remote_rsc,
                                       pcmk_rsc_failed|pcmk_rsc_stop_if_failed);
            }
            break; // Not done, do error handling

        case PCMK_EXEC_ERROR:
        case PCMK_EXEC_ERROR_HARD:
        case PCMK_EXEC_ERROR_FATAL:
        case PCMK_EXEC_TIMEOUT:
        case PCMK_EXEC_NOT_SUPPORTED:
        case PCMK_EXEC_INVALID:
            break; // Not done, do error handling

        default: // No other value should be possible at this point
            break;
    }

    unpack_failure_handling(&history, &failure_strategy, &fail_role);
    if ((failure_strategy == pcmk_on_fail_ignore)
        || ((failure_strategy == pcmk_on_fail_restart_container)
            && (strcmp(history.task, PCMK_ACTION_STOP) == 0))) {

        char *last_change_s = last_change_str(xml_op);

        crm_warn("Pretending failed %s (%s%s%s) of %s on %s at %s succeeded "
                 CRM_XS " %s",
                 history.task, services_ocf_exitcode_str(history.exit_status),
                 (pcmk__str_empty(history.exit_reason)? "" : ": "),
                 pcmk__s(history.exit_reason, ""), rsc->id, pe__node_name(node),
                 last_change_s, history.id);
        free(last_change_s);

        update_resource_state(&history, history.expected_exit_status,
                              *last_failure, on_fail);
        crm_xml_add(xml_op, XML_ATTR_UNAME, node->details->uname);
        pe__set_resource_flags(rsc, pcmk_rsc_ignore_failure);

        record_failed_op(&history);

        if ((failure_strategy == pcmk_on_fail_restart_container)
            && cmp_on_fail(*on_fail, pcmk_on_fail_restart) <= 0) {
            *on_fail = failure_strategy;
        }

    } else {
        unpack_rsc_op_failure(&history, failure_strategy, fail_role,
                              last_failure, on_fail);

        if (history.execution_status == PCMK_EXEC_ERROR_HARD) {
            uint8_t log_level = LOG_ERR;

            if (history.exit_status == PCMK_OCF_NOT_INSTALLED) {
                log_level = LOG_NOTICE;
            }
            do_crm_log(log_level,
                       "Preventing %s from restarting on %s because "
                       "of hard failure (%s%s%s) " CRM_XS " %s",
                       parent->id, pe__node_name(node),
                       services_ocf_exitcode_str(history.exit_status),
                       (pcmk__str_empty(history.exit_reason)? "" : ": "),
                       pcmk__s(history.exit_reason, ""), history.id);
            resource_location(parent, node, -INFINITY, "hard-error",
                              rsc->cluster);

        } else if (history.execution_status == PCMK_EXEC_ERROR_FATAL) {
            crm_err("Preventing %s from restarting anywhere because "
                    "of fatal failure (%s%s%s) " CRM_XS " %s",
                    parent->id, services_ocf_exitcode_str(history.exit_status),
                    (pcmk__str_empty(history.exit_reason)? "" : ": "),
                    pcmk__s(history.exit_reason, ""), history.id);
            resource_location(parent, NULL, -INFINITY, "fatal-error",
                              rsc->cluster);
        }
    }

done:
    pe_rsc_trace(rsc, "%s role on %s after %s is %s (next %s)",
                 rsc->id, pe__node_name(node), history.id,
                 role2text(rsc->role), role2text(rsc->next_role));
}

static void
add_node_attrs(const xmlNode *xml_obj, pcmk_node_t *node, bool overwrite,
               pcmk_scheduler_t *scheduler)
{
    const char *cluster_name = NULL;

    pe_rule_eval_data_t rule_data = {
        .node_hash = NULL,
        .role = pcmk_role_unknown,
        .now = scheduler->now,
        .match_data = NULL,
        .rsc_data = NULL,
        .op_data = NULL
    };

    g_hash_table_insert(node->details->attrs,
                        strdup(CRM_ATTR_UNAME), strdup(node->details->uname));

    g_hash_table_insert(node->details->attrs, strdup(CRM_ATTR_ID),
                        strdup(node->details->id));
    if (pcmk__str_eq(node->details->id, scheduler->dc_uuid, pcmk__str_casei)) {
        scheduler->dc_node = node;
        node->details->is_dc = TRUE;
        g_hash_table_insert(node->details->attrs,
                            strdup(CRM_ATTR_IS_DC), strdup(XML_BOOLEAN_TRUE));
    } else {
        g_hash_table_insert(node->details->attrs,
                            strdup(CRM_ATTR_IS_DC), strdup(XML_BOOLEAN_FALSE));
    }

    cluster_name = g_hash_table_lookup(scheduler->config_hash, "cluster-name");
    if (cluster_name) {
        g_hash_table_insert(node->details->attrs, strdup(CRM_ATTR_CLUSTER_NAME),
                            strdup(cluster_name));
    }

    pe__unpack_dataset_nvpairs(xml_obj, XML_TAG_ATTR_SETS, &rule_data,
                               node->details->attrs, NULL, overwrite,
                               scheduler);

    pe__unpack_dataset_nvpairs(xml_obj, XML_TAG_UTILIZATION, &rule_data,
                               node->details->utilization, NULL,
                               FALSE, scheduler);

    if (pe_node_attribute_raw(node, CRM_ATTR_SITE_NAME) == NULL) {
        const char *site_name = pe_node_attribute_raw(node, "site-name");

        if (site_name) {
            g_hash_table_insert(node->details->attrs,
                                strdup(CRM_ATTR_SITE_NAME),
                                strdup(site_name));

        } else if (cluster_name) {
            /* Default to cluster-name if unset */
            g_hash_table_insert(node->details->attrs,
                                strdup(CRM_ATTR_SITE_NAME),
                                strdup(cluster_name));
        }
    }
}

static GList *
extract_operations(const char *node, const char *rsc, xmlNode * rsc_entry, gboolean active_filter)
{
    int counter = -1;
    int stop_index = -1;
    int start_index = -1;

    xmlNode *rsc_op = NULL;

    GList *gIter = NULL;
    GList *op_list = NULL;
    GList *sorted_op_list = NULL;

    /* extract operations */
    op_list = NULL;
    sorted_op_list = NULL;

    for (rsc_op = pcmk__xe_first_child(rsc_entry);
         rsc_op != NULL; rsc_op = pcmk__xe_next(rsc_op)) {

        if (pcmk__str_eq((const char *)rsc_op->name, XML_LRM_TAG_RSC_OP,
                         pcmk__str_none)) {
            crm_xml_add(rsc_op, "resource", rsc);
            crm_xml_add(rsc_op, XML_ATTR_UNAME, node);
            op_list = g_list_prepend(op_list, rsc_op);
        }
    }

    if (op_list == NULL) {
        /* if there are no operations, there is nothing to do */
        return NULL;
    }

    sorted_op_list = g_list_sort(op_list, sort_op_by_callid);

    /* create active recurring operations as optional */
    if (active_filter == FALSE) {
        return sorted_op_list;
    }

    op_list = NULL;

    calculate_active_ops(sorted_op_list, &start_index, &stop_index);

    for (gIter = sorted_op_list; gIter != NULL; gIter = gIter->next) {
        xmlNode *rsc_op = (xmlNode *) gIter->data;

        counter++;

        if (start_index < stop_index) {
            crm_trace("Skipping %s: not active", ID(rsc_entry));
            break;

        } else if (counter < start_index) {
            crm_trace("Skipping %s: old", ID(rsc_op));
            continue;
        }
        op_list = g_list_append(op_list, rsc_op);
    }

    g_list_free(sorted_op_list);
    return op_list;
}

GList *
find_operations(const char *rsc, const char *node, gboolean active_filter,
                pcmk_scheduler_t *scheduler)
{
    GList *output = NULL;
    GList *intermediate = NULL;

    xmlNode *tmp = NULL;
    xmlNode *status = find_xml_node(scheduler->input, XML_CIB_TAG_STATUS, TRUE);

    pcmk_node_t *this_node = NULL;

    xmlNode *node_state = NULL;

    for (node_state = pcmk__xe_first_child(status); node_state != NULL;
         node_state = pcmk__xe_next(node_state)) {

        if (pcmk__str_eq((const char *)node_state->name, XML_CIB_TAG_STATE, pcmk__str_none)) {
            const char *uname = crm_element_value(node_state, XML_ATTR_UNAME);

            if (node != NULL && !pcmk__str_eq(uname, node, pcmk__str_casei)) {
                continue;
            }

            this_node = pe_find_node(scheduler->nodes, uname);
            if(this_node == NULL) {
                CRM_LOG_ASSERT(this_node != NULL);
                continue;

            } else if (pe__is_guest_or_remote_node(this_node)) {
                determine_remote_online_status(scheduler, this_node);

            } else {
                determine_online_status(node_state, this_node, scheduler);
            }

            if (this_node->details->online
                || pcmk_is_set(scheduler->flags, pcmk_sched_fencing_enabled)) {
                /* offline nodes run no resources...
                 * unless stonith is enabled in which case we need to
                 *   make sure rsc start events happen after the stonith
                 */
                xmlNode *lrm_rsc = NULL;

                tmp = find_xml_node(node_state, XML_CIB_TAG_LRM, FALSE);
                tmp = find_xml_node(tmp, XML_LRM_TAG_RESOURCES, FALSE);

                for (lrm_rsc = pcmk__xe_first_child(tmp); lrm_rsc != NULL;
                     lrm_rsc = pcmk__xe_next(lrm_rsc)) {

                    if (pcmk__str_eq((const char *)lrm_rsc->name,
                                     XML_LRM_TAG_RESOURCE, pcmk__str_none)) {

                        const char *rsc_id = crm_element_value(lrm_rsc, XML_ATTR_ID);

                        if (rsc != NULL && !pcmk__str_eq(rsc_id, rsc, pcmk__str_casei)) {
                            continue;
                        }

                        intermediate = extract_operations(uname, rsc_id, lrm_rsc, active_filter);
                        output = g_list_concat(output, intermediate);
                    }
                }
            }
        }
    }

    return output;
}