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/*
* Copyright 2016-2025 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 <glib.h>
#include <libxml/tree.h> // xmlNode
#include <crm/crm.h>
#include <crm/services.h>
#include <crm/services_internal.h>
#include <crm/common/ipc.h>
#include <crm/common/ipc_internal.h>
#include <crm/common/alerts_internal.h>
#include <crm/common/xml.h>
#include "pacemaker-execd.h"
/* Track in-flight alerts so we can wait for them at shutdown */
static GHashTable *inflight_alerts; /* key = call_id, value = timeout */
static gboolean draining_alerts = FALSE;
static inline void
add_inflight_alert(int call_id, int timeout)
{
if (inflight_alerts == NULL) {
inflight_alerts = pcmk__intkey_table(NULL);
}
pcmk__intkey_table_insert(inflight_alerts, call_id,
GINT_TO_POINTER(timeout));
}
static inline void
remove_inflight_alert(int call_id)
{
if (inflight_alerts != NULL) {
pcmk__intkey_table_remove(inflight_alerts, call_id);
}
}
static int
max_inflight_timeout(void)
{
GHashTableIter iter;
gpointer timeout;
int max_timeout = 0;
if (inflight_alerts) {
g_hash_table_iter_init(&iter, inflight_alerts);
while (g_hash_table_iter_next(&iter, NULL, &timeout)) {
if (GPOINTER_TO_INT(timeout) > max_timeout) {
max_timeout = GPOINTER_TO_INT(timeout);
}
}
}
return max_timeout;
}
struct alert_cb_s {
char *client_id;
int call_id;
};
static void
alert_complete(svc_action_t *action)
{
struct alert_cb_s *cb_data = (struct alert_cb_s *) (action->cb_data);
CRM_CHECK(cb_data != NULL, return);
remove_inflight_alert(cb_data->call_id);
if (action->status != PCMK_EXEC_DONE) {
const char *reason = services__exit_reason(action);
crm_notice("Could not send alert: %s%s%s%s " QB_XS " client=%s",
pcmk_exec_status_str(action->status),
(reason == NULL)? "" : " (",
(reason == NULL)? "" : reason,
(reason == NULL)? "" : ")",
cb_data->client_id);
} else if (action->rc != 0) {
crm_notice("Alert [%d] completed but exited with status %d "
QB_XS " client=%s",
action->pid, action->rc, cb_data->client_id);
} else {
crm_debug("Alert [%d] completed " QB_XS " client=%s",
action->pid, cb_data->client_id);
}
free(cb_data->client_id);
free(action->cb_data);
action->cb_data = NULL;
}
int
process_lrmd_alert_exec(pcmk__client_t *client, uint32_t id, xmlNode *request)
{
static int alert_sequence_no = 0;
xmlNode *alert_xml = pcmk__xpath_find_one(request->doc,
"//" PCMK__XE_LRMD_ALERT,
LOG_ERR);
const char *alert_id = crm_element_value(alert_xml, PCMK__XA_LRMD_ALERT_ID);
const char *alert_path = crm_element_value(alert_xml,
PCMK__XA_LRMD_ALERT_PATH);
svc_action_t *action = NULL;
int alert_timeout = 0;
int rc = pcmk_ok;
GHashTable *params = NULL;
struct alert_cb_s *cb_data = NULL;
if ((alert_id == NULL) || (alert_path == NULL) ||
(client == NULL) || (client->id == NULL)) { /* hint static analyzer */
rc = -EINVAL;
goto err;
}
if (draining_alerts) {
return pcmk_ok;
}
crm_element_value_int(alert_xml, PCMK__XA_LRMD_TIMEOUT, &alert_timeout);
crm_info("Executing alert %s for %s", alert_id, client->id);
params = xml2list(alert_xml);
pcmk__add_alert_key_int(params, PCMK__alert_key_node_sequence,
++alert_sequence_no);
cb_data = pcmk__assert_alloc(1, sizeof(struct alert_cb_s));
cb_data->client_id = pcmk__str_copy(client->id);
crm_element_value_int(request, PCMK__XA_LRMD_CALLID, &(cb_data->call_id));
action = services_alert_create(alert_id, alert_path, alert_timeout, params,
alert_sequence_no, cb_data);
if (action->rc != PCMK_OCF_UNKNOWN) {
rc = -E2BIG;
goto err;
}
rc = services_action_user(action, CRM_DAEMON_USER);
if (rc < 0) {
goto err;
}
add_inflight_alert(cb_data->call_id, alert_timeout);
if (services_alert_async(action, alert_complete) == FALSE) {
services_action_free(action);
}
return pcmk_ok;
err:
if (cb_data) {
free(cb_data->client_id);
free(cb_data);
}
services_action_free(action);
return rc;
}
static bool
drain_check(guint remaining_timeout_ms)
{
if (inflight_alerts != NULL) {
guint count = g_hash_table_size(inflight_alerts);
if (count > 0) {
crm_trace("%d alerts pending (%.3fs timeout remaining)",
count, remaining_timeout_ms / 1000.0);
return TRUE;
}
}
return FALSE;
}
void
lrmd_drain_alerts(GMainLoop *mloop)
{
if (inflight_alerts != NULL) {
guint timer_ms = max_inflight_timeout() + 5000;
crm_trace("Draining in-flight alerts (timeout %.3fs)",
timer_ms / 1000.0);
draining_alerts = TRUE;
pcmk_drain_main_loop(mloop, timer_ms, drain_check);
g_hash_table_destroy(inflight_alerts);
inflight_alerts = NULL;
}
}
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