Adding upstream version 2.1.7.upstream/2.1.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 225 insertions, 0 deletions

diff --git a/daemons/fenced/fenced_scheduler.c b/daemons/fenced/fenced_scheduler.c
new file mode 100644
index 0000000..27d990f
--- /dev/null
+++ b/daemons/fenced/fenced_scheduler.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright 2009-2023 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU General Public License version 2
+ * or later (GPLv2+) WITHOUT ANY WARRANTY.
+*/
+
+#include <crm_internal.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <glib.h>
+
+#include <crm/pengine/status.h>
+#include <crm/pengine/internal.h>
+
+#include <pacemaker-internal.h>
+#include <pacemaker-fenced.h>
+
+static pcmk_scheduler_t *scheduler = NULL;
+
+/*!
+ * \internal
+ * \brief Initialize scheduler data for fencer purposes
+ *
+ * \return Standard Pacemaker return code
+ */
+int
+fenced_scheduler_init(void)
+{
+    pcmk__output_t *logger = NULL;
+    int rc = pcmk__log_output_new(&logger);
+
+    if (rc != pcmk_rc_ok) {
+        return rc;
+    }
+
+    scheduler = pe_new_working_set();
+    if (scheduler == NULL) {
+        pcmk__output_free(logger);
+        return ENOMEM;
+    }
+
+    pe__register_messages(logger);
+    pcmk__register_lib_messages(logger);
+    pcmk__output_set_log_level(logger, LOG_TRACE);
+    scheduler->priv = logger;
+
+    return pcmk_rc_ok;
+}
+
+/*!
+ * \internal
+ * \brief Free all scheduler-related resources
+ */
+void
+fenced_scheduler_cleanup(void)
+{
+    if (scheduler != NULL) {
+        pcmk__output_t *logger = scheduler->priv;
+
+        if (logger != NULL) {
+            logger->finish(logger, CRM_EX_OK, true, NULL);
+            pcmk__output_free(logger);
+            scheduler->priv = NULL;
+        }
+        pe_free_working_set(scheduler);
+        scheduler = NULL;
+    }
+}
+
+/*!
+ * \internal
+ * \brief Check whether the local node is in a resource's allowed node list
+ *
+ * \param[in] rsc  Resource to check
+ *
+ * \return Pointer to node if found, otherwise NULL
+ */
+static pcmk_node_t *
+local_node_allowed_for(const pcmk_resource_t *rsc)
+{
+    if ((rsc != NULL) && (stonith_our_uname != NULL)) {
+        GHashTableIter iter;
+        pcmk_node_t *node = NULL;
+
+        g_hash_table_iter_init(&iter, rsc->allowed_nodes);
+        while (g_hash_table_iter_next(&iter, NULL, (void **) &node)) {
+            if (pcmk__str_eq(node->details->uname, stonith_our_uname,
+                             pcmk__str_casei)) {
+                return node;
+            }
+        }
+    }
+    return NULL;
+}
+
+/*!
+ * \internal
+ * \brief If a given resource or any of its children are fencing devices,
+ *        register the devices
+ *
+ * \param[in,out] data       Resource to check
+ * \param[in,out] user_data  Ignored
+ */
+static void
+register_if_fencing_device(gpointer data, gpointer user_data)
+{
+    pcmk_resource_t *rsc = data;
+
+    xmlNode *xml = NULL;
+    GHashTableIter hash_iter;
+    pcmk_node_t *node = NULL;
+    const char *name = NULL;
+    const char *value = NULL;
+    const char *rclass = NULL;
+    const char *agent = NULL;
+    const char *rsc_provides = NULL;
+    stonith_key_value_t *params = NULL;
+
+    // If this is a collective resource, check children instead
+    if (rsc->children != NULL) {
+        for (GList *iter = rsc->children; iter != NULL; iter = iter->next) {
+            register_if_fencing_device(iter->data, NULL);
+            if (pe_rsc_is_clone(rsc)) {
+                return; // Only one instance needs to be checked for clones
+            }
+        }
+        return;
+    }
+
+    rclass = crm_element_value(rsc->xml, XML_AGENT_ATTR_CLASS);
+    if (!pcmk__str_eq(rclass, PCMK_RESOURCE_CLASS_STONITH, pcmk__str_casei)) {
+        return; // Not a fencing device
+    }
+
+    if (pe__resource_is_disabled(rsc)) {
+        crm_info("Ignoring fencing device %s because it is disabled", rsc->id);
+        return;
+    }
+
+    if ((stonith_watchdog_timeout_ms <= 0) &&
+        pcmk__str_eq(rsc->id, STONITH_WATCHDOG_ID, pcmk__str_none)) {
+        crm_info("Ignoring fencing device %s "
+                 "because watchdog fencing is disabled", rsc->id);
+        return;
+    }
+
+    // Check whether local node is allowed to run resource
+    node = local_node_allowed_for(rsc);
+    if (node == NULL) {
+        crm_info("Ignoring fencing device %s "
+                 "because local node is not allowed to run it", rsc->id);
+        return;
+    }
+    if (node->weight < 0) {
+        crm_info("Ignoring fencing device %s "
+                 "because local node has preference %s for it",
+                 rsc->id, pcmk_readable_score(node->weight));
+        return;
+    }
+
+    // If device is in a group, check whether local node is allowed for group
+    if ((rsc->parent != NULL)
+        && (rsc->parent->variant == pcmk_rsc_variant_group)) {
+        pcmk_node_t *group_node = local_node_allowed_for(rsc->parent);
+
+        if ((group_node != NULL) && (group_node->weight < 0)) {
+            crm_info("Ignoring fencing device %s "
+                     "because local node has preference %s for its group",
+                     rsc->id, pcmk_readable_score(group_node->weight));
+            return;
+        }
+    }
+
+    crm_debug("Reloading configuration of fencing device %s", rsc->id);
+
+    agent = crm_element_value(rsc->xml, XML_EXPR_ATTR_TYPE);
+
+    get_meta_attributes(rsc->meta, rsc, node, scheduler);
+    rsc_provides = g_hash_table_lookup(rsc->meta, PCMK_STONITH_PROVIDES);
+
+    g_hash_table_iter_init(&hash_iter, pe_rsc_params(rsc, node, scheduler));
+    while (g_hash_table_iter_next(&hash_iter, (gpointer *) &name,
+                                  (gpointer *) &value)) {
+        if ((name == NULL) || (value == NULL)) {
+            continue;
+        }
+        params = stonith_key_value_add(params, name, value);
+    }
+
+    xml = create_device_registration_xml(pcmk__s(rsc->clone_name, rsc->id),
+                                         st_namespace_any, agent, params,
+                                         rsc_provides);
+    stonith_key_value_freeall(params, 1, 1);
+    CRM_ASSERT(stonith_device_register(xml, TRUE) == pcmk_ok);
+    free_xml(xml);
+}
+
+/*!
+ * \internal
+ * \brief Run the scheduler for fencer purposes
+ *
+ * \param[in] cib  Cluster's current CIB
+ */
+void
+fenced_scheduler_run(xmlNode *cib)
+{
+    CRM_CHECK((cib != NULL) && (scheduler != NULL), return);
+
+    if (scheduler->now != NULL) {
+        crm_time_free(scheduler->now);
+        scheduler->now = NULL;
+    }
+    scheduler->localhost = stonith_our_uname;
+    pcmk__schedule_actions(cib, pcmk_sched_location_only
+                                |pcmk_sched_no_compat
+                                |pcmk_sched_no_counts, scheduler);
+    g_list_foreach(scheduler->resources, register_if_fencing_device, NULL);
+
+    scheduler->input = NULL; // Wasn't a copy, so don't let API free it
+    pe_reset_working_set(scheduler);
+}