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/*
* Copyright 2004-2025 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 <sys/param.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <inttypes.h> // PRIx64
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <time.h>
#include <glib.h>
#include <libxml/tree.h>
#include <crm/crm.h>
#include <crm/cib/internal.h>
#include <crm/common/xml.h>
#include <crm/common/remote_internal.h>
#include <pacemaker-based.h>
struct cib_notification_s {
const xmlNode *msg;
struct iovec *iov;
int32_t iov_size;
};
static void
cib_notify_send_one(gpointer key, gpointer value, gpointer user_data)
{
const char *type = NULL;
gboolean do_send = FALSE;
int rc = pcmk_rc_ok;
pcmk__client_t *client = value;
struct cib_notification_s *update = user_data;
if (client->ipcs == NULL && client->remote == NULL) {
crm_warn("Skipping client with NULL channel");
return;
}
type = crm_element_value(update->msg, PCMK__XA_SUBT);
CRM_LOG_ASSERT(type != NULL);
if (pcmk_is_set(client->flags, cib_notify_diff)
&& pcmk__str_eq(type, PCMK__VALUE_CIB_DIFF_NOTIFY, pcmk__str_none)) {
do_send = TRUE;
} else if (pcmk_is_set(client->flags, cib_notify_confirm)
&& pcmk__str_eq(type, PCMK__VALUE_CIB_UPDATE_CONFIRMATION,
pcmk__str_none)) {
do_send = TRUE;
} else if (pcmk_is_set(client->flags, cib_notify_pre)
&& pcmk__str_eq(type, PCMK__VALUE_CIB_PRE_NOTIFY,
pcmk__str_none)) {
do_send = TRUE;
} else if (pcmk_is_set(client->flags, cib_notify_post)
&& pcmk__str_eq(type, PCMK__VALUE_CIB_POST_NOTIFY,
pcmk__str_none)) {
do_send = TRUE;
}
if (do_send) {
switch (PCMK__CLIENT_TYPE(client)) {
case pcmk__client_ipc:
rc = pcmk__ipc_send_iov(client, update->iov,
crm_ipc_server_event);
/* EAGAIN isn't an error for server events. Sending did fail
* with EAGAIN, but the iov was added to the send queue and we
* will attempt to send it again the next time pcmk__ipc_send_iov
* is called, or when crm_ipcs_flush_events_cb happens.
*/
if ((rc != EAGAIN) && (rc != pcmk_rc_ok)) {
crm_warn("Could not notify client %s: %s " QB_XS " id=%s",
pcmk__client_name(client), pcmk_rc_str(rc),
client->id);
}
break;
case pcmk__client_tls:
case pcmk__client_tcp:
crm_debug("Sent %s notification to client %s (id %s)",
type, pcmk__client_name(client), client->id);
pcmk__remote_send_xml(client->remote, update->msg);
break;
default:
crm_err("Unknown transport for client %s "
QB_XS " flags=%#016" PRIx64,
pcmk__client_name(client), client->flags);
}
}
}
static void
cib_notify_send(const xmlNode *xml)
{
struct iovec *iov;
struct cib_notification_s update;
GString *iov_buffer = NULL;
ssize_t bytes = 0;
int rc = pcmk_rc_ok;
uint16_t index = 0;
iov_buffer = g_string_sized_new(1024);
pcmk__xml_string(xml, 0, iov_buffer, 0);
do {
rc = pcmk__ipc_prepare_iov(0, iov_buffer, index, &iov, &bytes);
if ((rc != pcmk_rc_ok) && (rc != pcmk_rc_ipc_more)) {
crm_notice("Could not notify clients: %s " QB_XS " rc=%d",
pcmk_rc_str(rc), rc);
break;
}
update.msg = xml;
update.iov = iov;
update.iov_size = bytes;
pcmk__foreach_ipc_client(cib_notify_send_one, &update);
pcmk_free_ipc_event(iov);
if (rc == pcmk_rc_ok) {
break;
}
index++;
} while (true);
g_string_free(iov_buffer, TRUE);
}
void
cib_diff_notify(const char *op, int result, const char *call_id,
const char *client_id, const char *client_name,
const char *origin, xmlNode *update, xmlNode *diff)
{
int add_updates = 0;
int add_epoch = 0;
int add_admin_epoch = 0;
int del_updates = 0;
int del_epoch = 0;
int del_admin_epoch = 0;
uint8_t log_level = LOG_TRACE;
xmlNode *update_msg = NULL;
xmlNode *wrapper = NULL;
if (diff == NULL) {
return;
}
if (result != pcmk_ok) {
log_level = LOG_WARNING;
}
cib_diff_version_details(diff, &add_admin_epoch, &add_epoch, &add_updates,
&del_admin_epoch, &del_epoch, &del_updates);
if ((add_admin_epoch != del_admin_epoch)
|| (add_epoch != del_epoch)
|| (add_updates != del_updates)) {
do_crm_log(log_level,
"Updated CIB generation %d.%d.%d to %d.%d.%d from client "
"%s%s%s (%s) (%s)",
del_admin_epoch, del_epoch, del_updates,
add_admin_epoch, add_epoch, add_updates,
client_name,
((call_id != NULL)? " call " : ""), pcmk__s(call_id, ""),
pcmk__s(origin, "unspecified peer"), pcmk_strerror(result));
} else if ((add_admin_epoch != 0)
|| (add_epoch != 0)
|| (add_updates != 0)) {
do_crm_log(log_level,
"Local-only change to CIB generation %d.%d.%d from client "
"%s%s%s (%s) (%s)",
add_admin_epoch, add_epoch, add_updates,
client_name,
((call_id != NULL)? " call " : ""), pcmk__s(call_id, ""),
pcmk__s(origin, "unspecified peer"), pcmk_strerror(result));
}
update_msg = pcmk__xe_create(NULL, PCMK__XE_NOTIFY);
crm_xml_add(update_msg, PCMK__XA_T, PCMK__VALUE_CIB_NOTIFY);
crm_xml_add(update_msg, PCMK__XA_SUBT, PCMK__VALUE_CIB_DIFF_NOTIFY);
crm_xml_add(update_msg, PCMK__XA_CIB_OP, op);
crm_xml_add(update_msg, PCMK__XA_CIB_CLIENTID, client_id);
crm_xml_add(update_msg, PCMK__XA_CIB_CLIENTNAME, client_name);
crm_xml_add(update_msg, PCMK__XA_CIB_CALLID, call_id);
crm_xml_add(update_msg, PCMK__XA_SRC, origin);
crm_xml_add_int(update_msg, PCMK__XA_CIB_RC, result);
wrapper = pcmk__xe_create(update_msg, PCMK__XE_CIB_UPDATE_RESULT);
pcmk__xml_copy(wrapper, diff);
crm_log_xml_trace(update_msg, "diff-notify");
cib_notify_send(update_msg);
pcmk__xml_free(update_msg);
}
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