server/ctdb_control.c

   1 /*
   2    ctdb_control protocol code
   3
   4    Copyright (C) Andrew Tridgell  2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "includes.h"
  20 #include "lib/events/events.h"
  21 #include "lib/tdb/include/tdb.h"
  22 #include "system/network.h"
  23 #include "system/filesys.h"
  24 #include "system/wait.h"
  25 #include "../include/ctdb_private.h"
  26 #include "lib/util/dlinklist.h"
  27 #include "db_wrap.h"
  28
  29
  30 struct ctdb_control_state {
  31         struct ctdb_context *ctdb;
  32         uint32_t reqid;
  33         ctdb_control_callback_fn_t callback;
  34         void *private_data;
  35         unsigned flags;
  36 };
  37
  38
  39 /*
  40   dump talloc memory hierarchy, returning it as a blob to the client
  41  */
  42 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  43 {
  44         /* dump to a file, then send the file as a blob */
  45         FILE *f;
  46         long fsize;
  47         f = tmpfile();
  48         if (f == NULL) {
  49                 DEBUG(DEBUG_ERR,(__location__ " Unable to open tmpfile - %s\n", strerror(errno)));
  50                 return -1;
  51         }
  52         talloc_report_full(NULL, f);
  53         fsize = ftell(f);
  54         rewind(f);
  55         outdata->dptr = talloc_size(outdata, fsize);
  56         CTDB_NO_MEMORY(ctdb, outdata->dptr);
  57         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  58         fclose(f);
  59         if (outdata->dsize != fsize) {
  60                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  61                 return -1;
  62         }
  63         return 0;
  64 }
  65
  66
  67 /*
  68   process a control request
  69  */
  70 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  71                                      struct ctdb_req_control *c,
  72                                      TDB_DATA indata,
  73                                      TDB_DATA *outdata, uint32_t srcnode,
  74                                      const char **errormsg,
  75                                      bool *async_reply)
  76 {
  77         uint32_t opcode = c->opcode;
  78         uint64_t srvid = c->srvid;
  79         uint32_t client_id = c->client_id;
  80
  81         switch (opcode) {
  82         case CTDB_CONTROL_PROCESS_EXISTS: {
  83                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  84                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  85         }
  86
  87         case CTDB_CONTROL_SET_DEBUG: {
  88                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
  89                 LogLevel = *(int32_t *)indata.dptr;
  90                 return 0;
  91         }
  92
  93         case CTDB_CONTROL_GET_DEBUG: {
  94                 CHECK_CONTROL_DATA_SIZE(0);
  95                 outdata->dptr = (uint8_t *)&LogLevel;
  96                 outdata->dsize = sizeof(LogLevel);
  97                 return 0;
  98         }
  99
 100         case CTDB_CONTROL_STATISTICS: {
 101                 int i;
 102                 CHECK_CONTROL_DATA_SIZE(0);
 103                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 104                 ctdb->statistics.frozen = 0;
 105                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 106                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 107                                 ctdb->statistics.frozen = 1;
 108                         }
 109                 }
 110                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 111                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 112                 outdata->dsize = sizeof(ctdb->statistics);
 113                 return 0;
 114         }
 115
 116         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 117                 CHECK_CONTROL_DATA_SIZE(0);
 118                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 119                 outdata->dsize = sizeof(ctdb->tunable);
 120                 return 0;
 121         }
 122
 123         case CTDB_CONTROL_DUMP_MEMORY: {
 124                 CHECK_CONTROL_DATA_SIZE(0);
 125                 return ctdb_dump_memory(ctdb, outdata);
 126         }
 127
 128         case CTDB_CONTROL_STATISTICS_RESET: {
 129                 CHECK_CONTROL_DATA_SIZE(0);
 130                 ZERO_STRUCT(ctdb->statistics);
 131                 return 0;
 132         }
 133
 134         case CTDB_CONTROL_GETVNNMAP:
 135                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 136
 137         case CTDB_CONTROL_GET_DBMAP:
 138                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 139
 140         case CTDB_CONTROL_GET_NODEMAPv4:
 141                 return ctdb_control_getnodemapv4(ctdb, opcode, indata, outdata);
 142
 143         case CTDB_CONTROL_GET_NODEMAP:
 144                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 145
 146         case CTDB_CONTROL_RELOAD_NODES_FILE:
 147                 CHECK_CONTROL_DATA_SIZE(0);
 148                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 149
 150         case CTDB_CONTROL_SETVNNMAP:
 151                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 152
 153         case CTDB_CONTROL_PULL_DB:
 154                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 155                 return ctdb_control_pull_db(ctdb, indata, outdata);
 156
 157         case CTDB_CONTROL_SET_DMASTER:
 158                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
 159                 return ctdb_control_set_dmaster(ctdb, indata);
 160
 161         case CTDB_CONTROL_PUSH_DB:
 162                 return ctdb_control_push_db(ctdb, indata);
 163
 164         case CTDB_CONTROL_GET_RECMODE: {
 165                 return ctdb->recovery_mode;
 166         }
 167
 168         case CTDB_CONTROL_SET_RECMASTER: {
 169                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 170         }
 171
 172         case CTDB_CONTROL_GET_RECMASTER:
 173                 return ctdb->recovery_master;
 174
 175         case CTDB_CONTROL_GET_PID:
 176                 return getpid();
 177
 178         case CTDB_CONTROL_GET_PNN:
 179                 return ctdb->pnn;
 180
 181         case CTDB_CONTROL_PING:
 182                 CHECK_CONTROL_DATA_SIZE(0);
 183                 return ctdb->statistics.num_clients;
 184
 185         case CTDB_CONTROL_GET_DBNAME: {
 186                 uint32_t db_id;
 187                 struct ctdb_db_context *ctdb_db;
 188
 189                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 190                 db_id = *(uint32_t *)indata.dptr;
 191                 ctdb_db = find_ctdb_db(ctdb, db_id);
 192                 if (ctdb_db == NULL) return -1;
 193                 outdata->dptr = discard_const(ctdb_db->db_name);
 194                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 195                 return 0;
 196         }
 197
 198         case CTDB_CONTROL_GETDBPATH: {
 199                 uint32_t db_id;
 200                 struct ctdb_db_context *ctdb_db;
 201
 202                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 203                 db_id = *(uint32_t *)indata.dptr;
 204                 ctdb_db = find_ctdb_db(ctdb, db_id);
 205                 if (ctdb_db == NULL) return -1;
 206                 outdata->dptr = discard_const(ctdb_db->db_path);
 207                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 208                 return 0;
 209         }
 210
 211         case CTDB_CONTROL_DB_ATTACH:
 212                 return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false);
 213
 214         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 215                 return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true);
 216
 217         case CTDB_CONTROL_SET_CALL: {
 218                 struct ctdb_control_set_call *sc =
 219                         (struct ctdb_control_set_call *)indata.dptr;
 220                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 221                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 222         }
 223
 224         case CTDB_CONTROL_TRAVERSE_START:
 225                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 226                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 227
 228         case CTDB_CONTROL_TRAVERSE_ALL:
 229                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 230
 231         case CTDB_CONTROL_TRAVERSE_DATA:
 232                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 233
 234         case CTDB_CONTROL_TRAVERSE_KILL:
 235                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 236                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 237
 238         case CTDB_CONTROL_REGISTER_SRVID:
 239                 return daemon_register_message_handler(ctdb, client_id, srvid);
 240
 241         case CTDB_CONTROL_DEREGISTER_SRVID:
 242                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 243
 244         case CTDB_CONTROL_ENABLE_SEQNUM:
 245                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 246                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 247
 248         case CTDB_CONTROL_UPDATE_SEQNUM:
 249                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 250                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 251
 252         case CTDB_CONTROL_FREEZE:
 253                 CHECK_CONTROL_DATA_SIZE(0);
 254                 return ctdb_control_freeze(ctdb, c, async_reply);
 255
 256         case CTDB_CONTROL_THAW:
 257                 CHECK_CONTROL_DATA_SIZE(0);
 258                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 259
 260         case CTDB_CONTROL_SET_RECMODE:
 261                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 262                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 263
 264         case CTDB_CONTROL_GET_MONMODE:
 265                 CHECK_CONTROL_DATA_SIZE(0);
 266                 return ctdb_monitoring_mode(ctdb);
 267
 268         case CTDB_CONTROL_ENABLE_MONITOR:
 269                 CHECK_CONTROL_DATA_SIZE(0);
 270                 ctdb_enable_monitoring(ctdb);
 271                 return 0;
 272
 273         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 274                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 275
 276         case CTDB_CONTROL_DISABLE_MONITOR:
 277                 CHECK_CONTROL_DATA_SIZE(0);
 278                 ctdb_disable_monitoring(ctdb);
 279                 return 0;
 280
 281         case CTDB_CONTROL_SHUTDOWN:
 282                 ctdb_stop_recoverd(ctdb);
 283                 ctdb_stop_keepalive(ctdb);
 284                 ctdb_stop_monitoring(ctdb);
 285                 ctdb_release_all_ips(ctdb);
 286                 if (ctdb->methods != NULL) {
 287                         ctdb->methods->shutdown(ctdb);
 288                 }
 289                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 290                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 291                 exit(0);
 292
 293         case CTDB_CONTROL_TAKEOVER_IPv4:
 294                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 295                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 296
 297         case CTDB_CONTROL_TAKEOVER_IP:
 298                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 299                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 300
 301         case CTDB_CONTROL_RELEASE_IPv4:
 302                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 303                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 304
 305         case CTDB_CONTROL_RELEASE_IP:
 306                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 307                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 308
 309         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 310                 CHECK_CONTROL_DATA_SIZE(0);
 311                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 312
 313         case CTDB_CONTROL_GET_PUBLIC_IPS:
 314                 CHECK_CONTROL_DATA_SIZE(0);
 315                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 316
 317         case CTDB_CONTROL_TCP_CLIENT:
 318                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 319
 320         case CTDB_CONTROL_STARTUP:
 321                 CHECK_CONTROL_DATA_SIZE(0);
 322                 return ctdb_control_startup(ctdb, srcnode);
 323
 324         case CTDB_CONTROL_TCP_ADD:
 325                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp_vnn));
 326                 return ctdb_control_tcp_add(ctdb, indata);
 327
 328         case CTDB_CONTROL_SET_TUNABLE:
 329                 return ctdb_control_set_tunable(ctdb, indata);
 330
 331         case CTDB_CONTROL_GET_TUNABLE:
 332                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 333
 334         case CTDB_CONTROL_LIST_TUNABLES:
 335                 return ctdb_control_list_tunables(ctdb, outdata);
 336
 337         case CTDB_CONTROL_MODIFY_FLAGS:
 338                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 339                 return ctdb_control_modflags(ctdb, indata);
 340
 341         case CTDB_CONTROL_KILL_TCP:
 342                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 343                 return ctdb_control_kill_tcp(ctdb, indata);
 344
 345         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 346                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 347                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 348
 349         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 350                 /* data size is verified in the called function */
 351                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 352
 353         case CTDB_CONTROL_REGISTER_SERVER_ID:
 354                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 355                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 356
 357         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 358                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 359                 return ctdb_control_unregister_server_id(ctdb, indata);
 360
 361         case CTDB_CONTROL_CHECK_SERVER_ID:
 362                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 363                 return ctdb_control_check_server_id(ctdb, indata);
 364
 365         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 366                 CHECK_CONTROL_DATA_SIZE(0);
 367                 return ctdb_control_get_server_id_list(ctdb, outdata);
 368
 369         case CTDB_CONTROL_PERSISTENT_STORE:
 370                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 371
 372         case CTDB_CONTROL_UPDATE_RECORD:
 373                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 374
 375         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 376                 return ctdb_control_send_gratious_arp(ctdb, indata);
 377
 378         case CTDB_CONTROL_TRANSACTION_START:
 379                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 380                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 381
 382         case CTDB_CONTROL_TRANSACTION_COMMIT:
 383                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 384                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 385
 386         case CTDB_CONTROL_WIPE_DATABASE:
 387                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 388                 return ctdb_control_wipe_database(ctdb, indata);
 389
 390         case CTDB_CONTROL_UPTIME:
 391                 return ctdb_control_uptime(ctdb, outdata);
 392
 393         case CTDB_CONTROL_START_RECOVERY:
 394                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 395
 396         case CTDB_CONTROL_END_RECOVERY:
 397                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 398
 399         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 400                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 401
 402         case CTDB_CONTROL_ADD_PUBLIC_IP:
 403                 return ctdb_control_add_public_address(ctdb, indata);
 404
 405         case CTDB_CONTROL_DEL_PUBLIC_IP:
 406                 return ctdb_control_del_public_address(ctdb, indata);
 407
 408         case CTDB_CONTROL_GET_CAPABILITIES:
 409                 return ctdb_control_get_capabilities(ctdb, outdata);
 410
 411         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 412                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 413
 414         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 415                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 416
 417         case CTDB_CONTROL_TRANS2_COMMIT:
 418         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 419                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 420
 421         case CTDB_CONTROL_TRANS2_ERROR:
 422                 return ctdb_control_trans2_error(ctdb, c);
 423
 424         case CTDB_CONTROL_TRANS2_FINISHED:
 425                 return ctdb_control_trans2_finished(ctdb, c);
 426
 427         case CTDB_CONTROL_TRANS2_ACTIVE:
 428                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 429                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 430
 431         case CTDB_CONTROL_TRANS3_COMMIT:
 432                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 433
 434         case CTDB_CONTROL_RECD_PING:
 435                 CHECK_CONTROL_DATA_SIZE(0);
 436                 return ctdb_control_recd_ping(ctdb);
 437
 438         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 439                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 440                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 441
 442         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 443                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 444                 ctdb_reclock_latency(ctdb, "recd reclock", &ctdb->statistics.reclock.recd, *((double *)indata.dptr));
 445                 return 0;
 446         case CTDB_CONTROL_GET_RECLOCK_FILE:
 447                 CHECK_CONTROL_DATA_SIZE(0);
 448                 if (ctdb->recovery_lock_file != NULL) {
 449                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 450                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 451                 }
 452                 return 0;
 453         case CTDB_CONTROL_SET_RECLOCK_FILE:
 454                 ctdb->tunable.verify_recovery_lock = 0;
 455                 if (ctdb->recovery_lock_file != NULL) {
 456                         talloc_free(ctdb->recovery_lock_file);
 457                         ctdb->recovery_lock_file = NULL;
 458                 }
 459                 if (indata.dsize > 0) {
 460                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 461                         ctdb->tunable.verify_recovery_lock = 1;
 462                 }
 463                 return 0;
 464
 465         case CTDB_CONTROL_STOP_NODE:
 466                 CHECK_CONTROL_DATA_SIZE(0);
 467                 return ctdb_control_stop_node(ctdb, c, async_reply);
 468
 469         case CTDB_CONTROL_CONTINUE_NODE:
 470                 CHECK_CONTROL_DATA_SIZE(0);
 471                 return ctdb_control_continue_node(ctdb);
 472
 473         case CTDB_CONTROL_SET_NATGWSTATE: {
 474                 uint32_t natgwstate;
 475
 476                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 477                 natgwstate = *(uint32_t *)indata.dptr;
 478                 if (natgwstate == 0) {
 479                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 480                 } else {
 481                         ctdb->capabilities |= CTDB_CAP_NATGW;
 482                 }
 483                 return 0;
 484         }
 485
 486         case CTDB_CONTROL_SET_LMASTERROLE: {
 487                 uint32_t lmasterrole;
 488
 489                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 490                 lmasterrole = *(uint32_t *)indata.dptr;
 491                 if (lmasterrole == 0) {
 492                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 493                 } else {
 494                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 495                 }
 496                 return 0;
 497         }
 498
 499         case CTDB_CONTROL_SET_RECMASTERROLE: {
 500                 uint32_t recmasterrole;
 501
 502                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 503                 recmasterrole = *(uint32_t *)indata.dptr;
 504                 if (recmasterrole == 0) {
 505                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 506                 } else {
 507                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 508                 }
 509                 return 0;
 510         }
 511
 512         case CTDB_CONTROL_ENABLE_SCRIPT:
 513                 return ctdb_control_enable_script(ctdb, indata);
 514
 515         case CTDB_CONTROL_DISABLE_SCRIPT:
 516                 return ctdb_control_disable_script(ctdb, indata);
 517
 518         case CTDB_CONTROL_SET_BAN_STATE:
 519                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 520                 return ctdb_control_set_ban_state(ctdb, indata);
 521
 522         case CTDB_CONTROL_GET_BAN_STATE:
 523                 CHECK_CONTROL_DATA_SIZE(0);
 524                 return ctdb_control_get_ban_state(ctdb, outdata);
 525
 526         case CTDB_CONTROL_SET_DB_PRIORITY:
 527                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 528                 return ctdb_control_set_db_priority(ctdb, indata);
 529
 530         case CTDB_CONTROL_GET_DB_PRIORITY: {
 531                 uint32_t db_id;
 532                 struct ctdb_db_context *ctdb_db;
 533
 534                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 535                 db_id = *(uint32_t *)indata.dptr;
 536                 ctdb_db = find_ctdb_db(ctdb, db_id);
 537                 if (ctdb_db == NULL) return -1;
 538                 return ctdb_db->priority;
 539         }
 540
 541         case CTDB_CONTROL_TRANSACTION_CANCEL:
 542                 CHECK_CONTROL_DATA_SIZE(0);
 543                 return ctdb_control_transaction_cancel(ctdb);
 544
 545         case CTDB_CONTROL_REGISTER_NOTIFY:
 546                 return ctdb_control_register_notify(ctdb, client_id, indata);
 547
 548         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 549                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 550                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 551
 552         case CTDB_CONTROL_GET_LOG:
 553                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 554                 return ctdb_control_get_log(ctdb, indata);
 555
 556         case CTDB_CONTROL_CLEAR_LOG:
 557                 return ctdb_control_clear_log(ctdb);
 558
 559         case CTDB_CONTROL_GET_DB_SEQNUM:
 560                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 561                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 562
 563         case CTDB_CONTROL_DB_SET_HEALTHY:
 564                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 565                 return ctdb_control_db_set_healthy(ctdb, indata);
 566
 567         case CTDB_CONTROL_DB_GET_HEALTH:
 568                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 569                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 570
 571         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 572                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 573                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 574
 575         case CTDB_CONTROL_GET_IFACES:
 576                 CHECK_CONTROL_DATA_SIZE(0);
 577                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 578
 579         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 580                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 581                 return ctdb_control_set_iface_link(ctdb, c, indata);
 582
 583         default:
 584                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 585                 return -1;
 586         }
 587 }
 588
 589 /*
 590   send a reply for a ctdb control
 591  */
 592 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 593                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 594 {
 595         struct ctdb_reply_control *r;
 596         size_t len;
 597
 598         /* some controls send no reply */
 599         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 600                 return;
 601         }
 602
 603         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 604         if (errormsg) {
 605                 len += strlen(errormsg);
 606         }
 607         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 608         CTDB_NO_MEMORY_VOID(ctdb, r);
 609
 610         r->hdr.destnode     = c->hdr.srcnode;
 611         r->hdr.reqid        = c->hdr.reqid;
 612         r->status           = status;
 613         r->datalen          = outdata?outdata->dsize:0;
 614         if (outdata && outdata->dsize) {
 615                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 616         }
 617         if (errormsg) {
 618                 r->errorlen = strlen(errormsg);
 619                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 620         }
 621
 622         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 623
 624         talloc_free(r);
 625 }
 626
 627 /*
 628   called when a CTDB_REQ_CONTROL packet comes in
 629 */
 630 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 631 {
 632         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 633         TDB_DATA data, *outdata;
 634         int32_t status;
 635         bool async_reply = False;
 636         const char *errormsg = NULL;
 637
 638         data.dptr = &c->data[0];
 639         data.dsize = c->datalen;
 640
 641         outdata = talloc_zero(c, TDB_DATA);
 642
 643         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 644                                        &errormsg, &async_reply);
 645
 646         if (!async_reply) {
 647                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 648         }
 649 }
 650
 651 /*
 652   called when a CTDB_REPLY_CONTROL packet comes in
 653 */
 654 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 655 {
 656         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 657         TDB_DATA data;
 658         struct ctdb_control_state *state;
 659         const char *errormsg = NULL;
 660
 661         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 662         if (state == NULL) {
 663                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 664                          ctdb->pnn, hdr->reqid));
 665                 return;
 666         }
 667
 668         if (hdr->reqid != state->reqid) {
 669                 /* we found a record  but it was the wrong one */
 670                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 671                 return;
 672         }
 673
 674         data.dptr = &c->data[0];
 675         data.dsize = c->datalen;
 676         if (c->errorlen) {
 677                 errormsg = talloc_strndup(state,
 678                                           (char *)&c->data[c->datalen], c->errorlen);
 679         }
 680
 681         /* make state a child of the packet, so it goes away when the packet
 682            is freed. */
 683         talloc_steal(hdr, state);
 684
 685         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 686 }
 687
 688 static int ctdb_control_destructor(struct ctdb_control_state *state)
 689 {
 690         ctdb_reqid_remove(state->ctdb, state->reqid);
 691         return 0;
 692 }
 693
 694 /*
 695   handle a timeout of a control
 696  */
 697 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 698                        struct timeval t, void *private_data)
 699 {
 700         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 701         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 702
 703         state->ctdb->statistics.timeouts.control++;
 704
 705         talloc_steal(tmp_ctx, state);
 706
 707         state->callback(state->ctdb, -1, tdb_null,
 708                         "ctdb_control timed out",
 709                         state->private_data);
 710         talloc_free(tmp_ctx);
 711 }
 712
 713
 714 /*
 715   send a control message to a node
 716  */
 717 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 718                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 719                              uint32_t flags,
 720                              TDB_DATA data,
 721                              ctdb_control_callback_fn_t callback,
 722                              void *private_data)
 723 {
 724         struct ctdb_req_control *c;
 725         struct ctdb_control_state *state;
 726         size_t len;
 727
 728         if (ctdb->methods == NULL) {
 729                 DEBUG(DEBUG_ERR,(__location__ " Failed to send control. Transport is DOWN\n"));
 730                 return -1;
 731         }
 732
 733         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 734              (destnode == CTDB_BROADCAST_ALL) ||
 735              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 736             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 737                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 738                 return -1;
 739         }
 740
 741         if (destnode != CTDB_BROADCAST_VNNMAP &&
 742             destnode != CTDB_BROADCAST_ALL &&
 743             destnode != CTDB_BROADCAST_CONNECTED &&
 744             (!ctdb_validate_pnn(ctdb, destnode) ||
 745              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 746                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 747                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 748                 }
 749                 return 0;
 750         }
 751
 752         /* the state is made a child of private_data if possible. This means any reply
 753            will be discarded if the private_data goes away */
 754         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 755         CTDB_NO_MEMORY(ctdb, state);
 756
 757         state->reqid = ctdb_reqid_new(ctdb, state);
 758         state->callback = callback;
 759         state->private_data = private_data;
 760         state->ctdb = ctdb;
 761         state->flags = flags;
 762
 763         talloc_set_destructor(state, ctdb_control_destructor);
 764
 765         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 766         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 767                                     struct ctdb_req_control);
 768         CTDB_NO_MEMORY(ctdb, c);
 769         talloc_set_name_const(c, "ctdb_req_control packet");
 770
 771         c->hdr.destnode     = destnode;
 772         c->hdr.reqid        = state->reqid;
 773         c->opcode           = opcode;
 774         c->client_id        = client_id;
 775         c->flags            = flags;
 776         c->srvid            = srvid;
 777         c->datalen          = data.dsize;
 778         if (data.dsize) {
 779                 memcpy(&c->data[0], data.dptr, data.dsize);
 780         }
 781
 782         ctdb_queue_packet(ctdb, &c->hdr);
 783
 784         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 785                 talloc_free(state);
 786                 return 0;
 787         }
 788
 789         if (ctdb->tunable.control_timeout) {
 790                 event_add_timed(ctdb->ev, state,
 791                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 792                                 ctdb_control_timeout, state);
 793         }
 794
 795         talloc_free(c);
 796         return 0;
 797 }