root/daemons/based/based_notify.c

/* */

DEFINITIONS

1. cib_notify_send_one
2. cib_notify_send
3. attach_cib_generation
4. cib_diff_notify

   1 /*
   2  * Copyright 2004-2023 the Pacemaker project contributors
   3  *
   4  * The version control history for this file may have further details.
   5  *
   6  * This source code is licensed under the GNU General Public License version 2
   7  * or later (GPLv2+) WITHOUT ANY WARRANTY.
   8  */
   9 
  10 #include <crm_internal.h>
  11 
  12 #include <sys/param.h>
  13 #include <stdio.h>
  14 #include <sys/types.h>
  15 #include <unistd.h>
  16 #include <inttypes.h>           // PRIx64
  17 
  18 #include <stdlib.h>
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 
  22 #include <time.h>
  23 
  24 #include <glib.h>
  25 #include <libxml/tree.h>
  26 
  27 #include <crm/crm.h>
  28 #include <crm/cib/internal.h>
  29 #include <crm/msg_xml.h>
  30 
  31 #include <crm/common/xml.h>
  32 #include <crm/common/remote_internal.h>
  33 #include <pacemaker-based.h>
  34 
  35 struct cib_notification_s {
  36     const xmlNode *msg;
  37     struct iovec *iov;
  38     int32_t iov_size;
  39 };
  40 
  41 static void
  42 cib_notify_send_one(gpointer key, gpointer value, gpointer user_data)
     /*  */
  43 {
  44     const char *type = NULL;
  45     gboolean do_send = FALSE;
  46     int rc = pcmk_rc_ok;
  47 
  48     pcmk__client_t *client = value;
  49     struct cib_notification_s *update = user_data;
  50 
  51     if (client->ipcs == NULL && client->remote == NULL) {
  52         crm_warn("Skipping client with NULL channel");
  53         return;
  54     }
  55 
  56     type = crm_element_value(update->msg, F_SUBTYPE);
  57     CRM_LOG_ASSERT(type != NULL);
  58 
  59     if (pcmk_is_set(client->flags, cib_notify_diff)
  60         && pcmk__str_eq(type, T_CIB_DIFF_NOTIFY, pcmk__str_casei)) {
  61 
  62         do_send = TRUE;
  63 
  64     } else if (pcmk_is_set(client->flags, cib_notify_confirm)
  65                && pcmk__str_eq(type, T_CIB_UPDATE_CONFIRM, pcmk__str_casei)) {
  66         do_send = TRUE;
  67 
  68     } else if (pcmk_is_set(client->flags, cib_notify_pre)
  69                && pcmk__str_eq(type, T_CIB_PRE_NOTIFY, pcmk__str_casei)) {
  70         do_send = TRUE;
  71 
  72     } else if (pcmk_is_set(client->flags, cib_notify_post)
  73                && pcmk__str_eq(type, T_CIB_POST_NOTIFY, pcmk__str_casei)) {
  74 
  75         do_send = TRUE;
  76     }
  77 
  78     if (do_send) {
  79         switch (PCMK__CLIENT_TYPE(client)) {
  80             case pcmk__client_ipc:
  81                 rc = pcmk__ipc_send_iov(client, update->iov,
  82                                         crm_ipc_server_event);
  83                 if (rc != pcmk_rc_ok) {
  84                     crm_warn("Could not notify client %s: %s " CRM_XS " id=%s",
  85                              pcmk__client_name(client), pcmk_rc_str(rc),
  86                              client->id);
  87                 }
  88                 break;
  89 #ifdef HAVE_GNUTLS_GNUTLS_H
  90             case pcmk__client_tls:
  91 #endif
  92             case pcmk__client_tcp:
  93                 crm_debug("Sent %s notification to client %s (id %s)",
  94                           type, pcmk__client_name(client), client->id);
  95                 pcmk__remote_send_xml(client->remote, update->msg);
  96                 break;
  97             default:
  98                 crm_err("Unknown transport for client %s "
  99                         CRM_XS " flags=%#016" PRIx64,
 100                         pcmk__client_name(client), client->flags);
 101         }
 102     }
 103 }
 104 
 105 static void
 106 cib_notify_send(const xmlNode *xml)
     /*  */
 107 {
 108     struct iovec *iov;
 109     struct cib_notification_s update;
 110 
 111     ssize_t bytes = 0;
 112     int rc = pcmk__ipc_prepare_iov(0, xml, 0, &iov, &bytes);
 113 
 114     if (rc == pcmk_rc_ok) {
 115         update.msg = xml;
 116         update.iov = iov;
 117         update.iov_size = bytes;
 118         pcmk__foreach_ipc_client(cib_notify_send_one, &update);
 119 
 120     } else {
 121         crm_notice("Could not notify clients: %s " CRM_XS " rc=%d",
 122                    pcmk_rc_str(rc), rc);
 123     }
 124     pcmk_free_ipc_event(iov);
 125 }
 126 
 127 static void
 128 attach_cib_generation(xmlNode *msg, const char *field, xmlNode *a_cib)
     /*  */
 129 {
 130     xmlNode *generation = create_xml_node(NULL, XML_CIB_TAG_GENERATION_TUPPLE);
 131 
 132     if (a_cib != NULL) {
 133         copy_in_properties(generation, a_cib);
 134     }
 135     add_message_xml(msg, field, generation);
 136     free_xml(generation);
 137 }
 138 
 139 void
 140 cib_diff_notify(const char *op, int result, const char *call_id,
     /*  */
 141                 const char *client_id, const char *client_name,
 142                 const char *origin, xmlNode *update, xmlNode *diff)
 143 {
 144     int add_updates = 0;
 145     int add_epoch = 0;
 146     int add_admin_epoch = 0;
 147 
 148     int del_updates = 0;
 149     int del_epoch = 0;
 150     int del_admin_epoch = 0;
 151 
 152     uint8_t log_level = LOG_TRACE;
 153 
 154     xmlNode *update_msg = NULL;
 155     const char *type = NULL;
 156 
 157     if (diff == NULL) {
 158         return;
 159     }
 160 
 161     if (result != pcmk_ok) {
 162         log_level = LOG_WARNING;
 163     }
 164 
 165     cib_diff_version_details(diff, &add_admin_epoch, &add_epoch, &add_updates,
 166                              &del_admin_epoch, &del_epoch, &del_updates);
 167 
 168     if ((add_admin_epoch != del_admin_epoch)
 169         || (add_epoch != del_epoch)
 170         || (add_updates != del_updates)) {
 171 
 172         do_crm_log(log_level,
 173                    "Updated CIB generation %d.%d.%d to %d.%d.%d from client "
 174                    "%s%s%s (%s) (%s)",
 175                    del_admin_epoch, del_epoch, del_updates,
 176                    add_admin_epoch, add_epoch, add_updates,
 177                    client_name,
 178                    ((call_id != NULL)? " call " : ""), pcmk__s(call_id, ""),
 179                    pcmk__s(origin, "unspecified peer"), pcmk_strerror(result));
 180 
 181     } else if ((add_admin_epoch != 0)
 182                || (add_epoch != 0)
 183                || (add_updates != 0)) {
 184 
 185         do_crm_log(log_level,
 186                    "Local-only change to CIB generation %d.%d.%d from client "
 187                    "%s%s%s (%s) (%s)",
 188                    add_admin_epoch, add_epoch, add_updates,
 189                    client_name,
 190                    ((call_id != NULL)? " call " : ""), pcmk__s(call_id, ""),
 191                    pcmk__s(origin, "unspecified peer"), pcmk_strerror(result));
 192     }
 193 
 194     update_msg = create_xml_node(NULL, "notify");
 195 
 196     crm_xml_add(update_msg, F_TYPE, T_CIB_NOTIFY);
 197     crm_xml_add(update_msg, F_SUBTYPE, T_CIB_DIFF_NOTIFY);
 198     crm_xml_add(update_msg, F_CIB_OPERATION, op);
 199     crm_xml_add(update_msg, F_CIB_CLIENTID, client_id);
 200     crm_xml_add(update_msg, F_CIB_CLIENTNAME, client_name);
 201     crm_xml_add(update_msg, F_CIB_CALLID, call_id);
 202     crm_xml_add(update_msg, F_ORIG, origin);
 203     crm_xml_add_int(update_msg, F_CIB_RC, result);
 204 
 205     if (update != NULL) {
 206         type = (const char *) update->name;
 207         crm_trace("Setting type to update->name: %s", type);
 208     } else {
 209         type = (const char *) diff->name;
 210         crm_trace("Setting type to new_obj->name: %s", type);
 211     }
 212     crm_xml_add(update_msg, F_CIB_OBJID, ID(diff));
 213     crm_xml_add(update_msg, F_CIB_OBJTYPE, type);
 214     attach_cib_generation(update_msg, "cib_generation", the_cib);
 215 
 216     if (update != NULL) {
 217         add_message_xml(update_msg, F_CIB_UPDATE, update);
 218     }
 219     add_message_xml(update_msg, F_CIB_UPDATE_RESULT, diff);
 220 
 221     crm_log_xml_trace(update_msg, "diff-notify");
 222     cib_notify_send(update_msg);
 223     free_xml(update_msg);
 224 }

/* */