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                 int i;
 166                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 167                         return CTDB_RECOVERY_ACTIVE;
 168                 }
 169                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 170                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 171                                 return CTDB_RECOVERY_ACTIVE;
 172                         }
 173                 }
 174                 return CTDB_RECOVERY_NORMAL;
 175         }
 176
 177         case CTDB_CONTROL_SET_RECMASTER: {
 178                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 179         }
 180
 181         case CTDB_CONTROL_GET_RECMASTER:
 182                 return ctdb->recovery_master;
 183
 184         case CTDB_CONTROL_GET_PID:
 185                 return getpid();
 186
 187         case CTDB_CONTROL_GET_PNN:
 188                 return ctdb->pnn;
 189
 190         case CTDB_CONTROL_PING:
 191                 CHECK_CONTROL_DATA_SIZE(0);
 192                 return ctdb->statistics.num_clients;
 193
 194         case CTDB_CONTROL_GET_DBNAME: {
 195                 uint32_t db_id;
 196                 struct ctdb_db_context *ctdb_db;
 197
 198                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 199                 db_id = *(uint32_t *)indata.dptr;
 200                 ctdb_db = find_ctdb_db(ctdb, db_id);
 201                 if (ctdb_db == NULL) return -1;
 202                 outdata->dptr = discard_const(ctdb_db->db_name);
 203                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 204                 return 0;
 205         }
 206
 207         case CTDB_CONTROL_GETDBPATH: {
 208                 uint32_t db_id;
 209                 struct ctdb_db_context *ctdb_db;
 210
 211                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 212                 db_id = *(uint32_t *)indata.dptr;
 213                 ctdb_db = find_ctdb_db(ctdb, db_id);
 214                 if (ctdb_db == NULL) return -1;
 215                 outdata->dptr = discard_const(ctdb_db->db_path);
 216                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 217                 return 0;
 218         }
 219
 220         case CTDB_CONTROL_DB_ATTACH:
 221                 return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false);
 222
 223         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 224                 return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true);
 225
 226         case CTDB_CONTROL_SET_CALL: {
 227                 struct ctdb_control_set_call *sc =
 228                         (struct ctdb_control_set_call *)indata.dptr;
 229                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 230                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 231         }
 232
 233         case CTDB_CONTROL_TRAVERSE_START:
 234                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 235                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 236
 237         case CTDB_CONTROL_TRAVERSE_ALL:
 238                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 239
 240         case CTDB_CONTROL_TRAVERSE_DATA:
 241                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 242
 243         case CTDB_CONTROL_TRAVERSE_KILL:
 244                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 245                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 246
 247         case CTDB_CONTROL_REGISTER_SRVID:
 248                 return daemon_register_message_handler(ctdb, client_id, srvid);
 249
 250         case CTDB_CONTROL_DEREGISTER_SRVID:
 251                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 252
 253         case CTDB_CONTROL_ENABLE_SEQNUM:
 254                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 255                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 256
 257         case CTDB_CONTROL_UPDATE_SEQNUM:
 258                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 259                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 260
 261         case CTDB_CONTROL_FREEZE:
 262                 CHECK_CONTROL_DATA_SIZE(0);
 263                 return ctdb_control_freeze(ctdb, c, async_reply);
 264
 265         case CTDB_CONTROL_THAW:
 266                 CHECK_CONTROL_DATA_SIZE(0);
 267                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 268
 269         case CTDB_CONTROL_SET_RECMODE:
 270                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 271                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 272
 273         case CTDB_CONTROL_GET_MONMODE:
 274                 CHECK_CONTROL_DATA_SIZE(0);
 275                 return ctdb_monitoring_mode(ctdb);
 276
 277         case CTDB_CONTROL_ENABLE_MONITOR:
 278                 CHECK_CONTROL_DATA_SIZE(0);
 279                 ctdb_enable_monitoring(ctdb);
 280                 return 0;
 281
 282         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 283                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 284
 285         case CTDB_CONTROL_DISABLE_MONITOR:
 286                 CHECK_CONTROL_DATA_SIZE(0);
 287                 ctdb_disable_monitoring(ctdb);
 288                 return 0;
 289
 290         case CTDB_CONTROL_SHUTDOWN:
 291                 ctdb_stop_recoverd(ctdb);
 292                 ctdb_stop_keepalive(ctdb);
 293                 ctdb_stop_monitoring(ctdb);
 294                 ctdb_release_all_ips(ctdb);
 295                 if (ctdb->methods != NULL) {
 296                         ctdb->methods->shutdown(ctdb);
 297                 }
 298                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 299                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 300                 exit(0);
 301
 302         case CTDB_CONTROL_TAKEOVER_IPv4:
 303                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 304                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 305
 306         case CTDB_CONTROL_TAKEOVER_IP:
 307                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 308                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 309
 310         case CTDB_CONTROL_RELEASE_IPv4:
 311                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 312                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 313
 314         case CTDB_CONTROL_RELEASE_IP:
 315                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 316                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 317
 318         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 319                 CHECK_CONTROL_DATA_SIZE(0);
 320                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 321
 322         case CTDB_CONTROL_GET_PUBLIC_IPS:
 323                 CHECK_CONTROL_DATA_SIZE(0);
 324                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 325
 326         case CTDB_CONTROL_TCP_CLIENT:
 327                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 328
 329         case CTDB_CONTROL_STARTUP:
 330                 CHECK_CONTROL_DATA_SIZE(0);
 331                 return ctdb_control_startup(ctdb, srcnode);
 332
 333         case CTDB_CONTROL_TCP_ADD:
 334                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp_vnn));
 335                 return ctdb_control_tcp_add(ctdb, indata);
 336
 337         case CTDB_CONTROL_SET_TUNABLE:
 338                 return ctdb_control_set_tunable(ctdb, indata);
 339
 340         case CTDB_CONTROL_GET_TUNABLE:
 341                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 342
 343         case CTDB_CONTROL_LIST_TUNABLES:
 344                 return ctdb_control_list_tunables(ctdb, outdata);
 345
 346         case CTDB_CONTROL_MODIFY_FLAGS:
 347                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 348                 return ctdb_control_modflags(ctdb, indata);
 349
 350         case CTDB_CONTROL_KILL_TCP:
 351                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 352                 return ctdb_control_kill_tcp(ctdb, indata);
 353
 354         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 355                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 356                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 357
 358         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 359                 /* data size is verified in the called function */
 360                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 361
 362         case CTDB_CONTROL_REGISTER_SERVER_ID:
 363                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 364                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 365
 366         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 367                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 368                 return ctdb_control_unregister_server_id(ctdb, indata);
 369
 370         case CTDB_CONTROL_CHECK_SERVER_ID:
 371                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 372                 return ctdb_control_check_server_id(ctdb, indata);
 373
 374         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 375                 CHECK_CONTROL_DATA_SIZE(0);
 376                 return ctdb_control_get_server_id_list(ctdb, outdata);
 377
 378         case CTDB_CONTROL_PERSISTENT_STORE:
 379                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 380
 381         case CTDB_CONTROL_UPDATE_RECORD:
 382                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 383
 384         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 385                 return ctdb_control_send_gratious_arp(ctdb, indata);
 386
 387         case CTDB_CONTROL_TRANSACTION_START:
 388                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 389                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 390
 391         case CTDB_CONTROL_TRANSACTION_COMMIT:
 392                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 393                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 394
 395         case CTDB_CONTROL_WIPE_DATABASE:
 396                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 397                 return ctdb_control_wipe_database(ctdb, indata);
 398
 399         case CTDB_CONTROL_UPTIME:
 400                 return ctdb_control_uptime(ctdb, outdata);
 401
 402         case CTDB_CONTROL_START_RECOVERY:
 403                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 404
 405         case CTDB_CONTROL_END_RECOVERY:
 406                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 407
 408         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 409                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 410
 411         case CTDB_CONTROL_ADD_PUBLIC_IP:
 412                 return ctdb_control_add_public_address(ctdb, indata);
 413
 414         case CTDB_CONTROL_DEL_PUBLIC_IP:
 415                 return ctdb_control_del_public_address(ctdb, indata);
 416
 417         case CTDB_CONTROL_GET_CAPABILITIES:
 418                 return ctdb_control_get_capabilities(ctdb, outdata);
 419
 420         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 421                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 422
 423         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 424                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 425
 426         case CTDB_CONTROL_TRANS2_COMMIT:
 427         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 428                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 429
 430         case CTDB_CONTROL_TRANS2_ERROR:
 431                 return ctdb_control_trans2_error(ctdb, c);
 432
 433         case CTDB_CONTROL_TRANS2_FINISHED:
 434                 return ctdb_control_trans2_finished(ctdb, c);
 435
 436         case CTDB_CONTROL_TRANS2_ACTIVE:
 437                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 438                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 439
 440         case CTDB_CONTROL_TRANS3_COMMIT:
 441                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 442
 443         case CTDB_CONTROL_RECD_PING:
 444                 CHECK_CONTROL_DATA_SIZE(0);
 445                 return ctdb_control_recd_ping(ctdb);
 446
 447         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 448                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 449                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 450
 451         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 452                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 453                 ctdb_reclock_latency(ctdb, "recd reclock", &ctdb->statistics.reclock.recd, *((double *)indata.dptr));
 454                 return 0;
 455         case CTDB_CONTROL_GET_RECLOCK_FILE:
 456                 CHECK_CONTROL_DATA_SIZE(0);
 457                 if (ctdb->recovery_lock_file != NULL) {
 458                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 459                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 460                 }
 461                 return 0;
 462         case CTDB_CONTROL_SET_RECLOCK_FILE:
 463                 ctdb->tunable.verify_recovery_lock = 0;
 464                 if (ctdb->recovery_lock_file != NULL) {
 465                         talloc_free(ctdb->recovery_lock_file);
 466                         ctdb->recovery_lock_file = NULL;
 467                 }
 468                 if (indata.dsize > 0) {
 469                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 470                         ctdb->tunable.verify_recovery_lock = 1;
 471                 }
 472                 return 0;
 473
 474         case CTDB_CONTROL_STOP_NODE:
 475                 CHECK_CONTROL_DATA_SIZE(0);
 476                 return ctdb_control_stop_node(ctdb, c, async_reply);
 477
 478         case CTDB_CONTROL_CONTINUE_NODE:
 479                 CHECK_CONTROL_DATA_SIZE(0);
 480                 return ctdb_control_continue_node(ctdb);
 481
 482         case CTDB_CONTROL_SET_NATGWSTATE: {
 483                 uint32_t natgwstate;
 484
 485                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 486                 natgwstate = *(uint32_t *)indata.dptr;
 487                 if (natgwstate == 0) {
 488                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 489                 } else {
 490                         ctdb->capabilities |= CTDB_CAP_NATGW;
 491                 }
 492                 return 0;
 493         }
 494
 495         case CTDB_CONTROL_SET_LMASTERROLE: {
 496                 uint32_t lmasterrole;
 497
 498                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 499                 lmasterrole = *(uint32_t *)indata.dptr;
 500                 if (lmasterrole == 0) {
 501                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 502                 } else {
 503                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 504                 }
 505                 return 0;
 506         }
 507
 508         case CTDB_CONTROL_SET_RECMASTERROLE: {
 509                 uint32_t recmasterrole;
 510
 511                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 512                 recmasterrole = *(uint32_t *)indata.dptr;
 513                 if (recmasterrole == 0) {
 514                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 515                 } else {
 516                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 517                 }
 518                 return 0;
 519         }
 520
 521         case CTDB_CONTROL_ENABLE_SCRIPT:
 522                 return ctdb_control_enable_script(ctdb, indata);
 523
 524         case CTDB_CONTROL_DISABLE_SCRIPT:
 525                 return ctdb_control_disable_script(ctdb, indata);
 526
 527         case CTDB_CONTROL_SET_BAN_STATE:
 528                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 529                 return ctdb_control_set_ban_state(ctdb, indata);
 530
 531         case CTDB_CONTROL_GET_BAN_STATE:
 532                 CHECK_CONTROL_DATA_SIZE(0);
 533                 return ctdb_control_get_ban_state(ctdb, outdata);
 534
 535         case CTDB_CONTROL_SET_DB_PRIORITY:
 536                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 537                 return ctdb_control_set_db_priority(ctdb, indata);
 538
 539         case CTDB_CONTROL_GET_DB_PRIORITY: {
 540                 uint32_t db_id;
 541                 struct ctdb_db_context *ctdb_db;
 542
 543                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 544                 db_id = *(uint32_t *)indata.dptr;
 545                 ctdb_db = find_ctdb_db(ctdb, db_id);
 546                 if (ctdb_db == NULL) return -1;
 547                 return ctdb_db->priority;
 548         }
 549
 550         case CTDB_CONTROL_TRANSACTION_CANCEL:
 551                 CHECK_CONTROL_DATA_SIZE(0);
 552                 return ctdb_control_transaction_cancel(ctdb);
 553
 554         case CTDB_CONTROL_REGISTER_NOTIFY:
 555                 return ctdb_control_register_notify(ctdb, client_id, indata);
 556
 557         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 558                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 559                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 560
 561         case CTDB_CONTROL_GET_LOG:
 562                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 563                 return ctdb_control_get_log(ctdb, indata);
 564
 565         case CTDB_CONTROL_CLEAR_LOG:
 566                 return ctdb_control_clear_log(ctdb);
 567
 568         case CTDB_CONTROL_GET_DB_SEQNUM:
 569                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 570                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 571
 572         case CTDB_CONTROL_DB_SET_HEALTHY:
 573                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 574                 return ctdb_control_db_set_healthy(ctdb, indata);
 575
 576         case CTDB_CONTROL_DB_GET_HEALTH:
 577                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 578                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 579
 580         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 581                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 582                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 583
 584         case CTDB_CONTROL_GET_IFACES:
 585                 CHECK_CONTROL_DATA_SIZE(0);
 586                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 587
 588         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 589                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 590                 return ctdb_control_set_iface_link(ctdb, c, indata);
 591
 592         default:
 593                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 594                 return -1;
 595         }
 596 }
 597
 598 /*
 599   send a reply for a ctdb control
 600  */
 601 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 602                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 603 {
 604         struct ctdb_reply_control *r;
 605         size_t len;
 606
 607         /* some controls send no reply */
 608         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 609                 return;
 610         }
 611
 612         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 613         if (errormsg) {
 614                 len += strlen(errormsg);
 615         }
 616         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 617         CTDB_NO_MEMORY_VOID(ctdb, r);
 618
 619         r->hdr.destnode     = c->hdr.srcnode;
 620         r->hdr.reqid        = c->hdr.reqid;
 621         r->status           = status;
 622         r->datalen          = outdata?outdata->dsize:0;
 623         if (outdata && outdata->dsize) {
 624                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 625         }
 626         if (errormsg) {
 627                 r->errorlen = strlen(errormsg);
 628                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 629         }
 630
 631         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 632
 633         talloc_free(r);
 634 }
 635
 636 /*
 637   called when a CTDB_REQ_CONTROL packet comes in
 638 */
 639 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 640 {
 641         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 642         TDB_DATA data, *outdata;
 643         int32_t status;
 644         bool async_reply = False;
 645         const char *errormsg = NULL;
 646
 647         data.dptr = &c->data[0];
 648         data.dsize = c->datalen;
 649
 650         outdata = talloc_zero(c, TDB_DATA);
 651
 652         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 653                                        &errormsg, &async_reply);
 654
 655         if (!async_reply) {
 656                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 657         }
 658 }
 659
 660 /*
 661   called when a CTDB_REPLY_CONTROL packet comes in
 662 */
 663 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 664 {
 665         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 666         TDB_DATA data;
 667         struct ctdb_control_state *state;
 668         const char *errormsg = NULL;
 669
 670         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 671         if (state == NULL) {
 672                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 673                          ctdb->pnn, hdr->reqid));
 674                 return;
 675         }
 676
 677         if (hdr->reqid != state->reqid) {
 678                 /* we found a record  but it was the wrong one */
 679                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 680                 return;
 681         }
 682
 683         data.dptr = &c->data[0];
 684         data.dsize = c->datalen;
 685         if (c->errorlen) {
 686                 errormsg = talloc_strndup(state,
 687                                           (char *)&c->data[c->datalen], c->errorlen);
 688         }
 689
 690         /* make state a child of the packet, so it goes away when the packet
 691            is freed. */
 692         talloc_steal(hdr, state);
 693
 694         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 695 }
 696
 697 static int ctdb_control_destructor(struct ctdb_control_state *state)
 698 {
 699         ctdb_reqid_remove(state->ctdb, state->reqid);
 700         return 0;
 701 }
 702
 703 /*
 704   handle a timeout of a control
 705  */
 706 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 707                        struct timeval t, void *private_data)
 708 {
 709         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 710         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 711
 712         state->ctdb->statistics.timeouts.control++;
 713
 714         talloc_steal(tmp_ctx, state);
 715
 716         state->callback(state->ctdb, -1, tdb_null,
 717                         "ctdb_control timed out",
 718                         state->private_data);
 719         talloc_free(tmp_ctx);
 720 }
 721
 722
 723 /*
 724   send a control message to a node
 725  */
 726 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 727                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 728                              uint32_t flags,
 729                              TDB_DATA data,
 730                              ctdb_control_callback_fn_t callback,
 731                              void *private_data)
 732 {
 733         struct ctdb_req_control *c;
 734         struct ctdb_control_state *state;
 735         size_t len;
 736
 737         if (ctdb->methods == NULL) {
 738                 DEBUG(DEBUG_ERR,(__location__ " Failed to send control. Transport is DOWN\n"));
 739                 return -1;
 740         }
 741
 742         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 743              (destnode == CTDB_BROADCAST_ALL) ||
 744              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 745             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 746                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 747                 return -1;
 748         }
 749
 750         if (destnode != CTDB_BROADCAST_VNNMAP &&
 751             destnode != CTDB_BROADCAST_ALL &&
 752             destnode != CTDB_BROADCAST_CONNECTED &&
 753             (!ctdb_validate_pnn(ctdb, destnode) ||
 754              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 755                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 756                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 757                 }
 758                 return 0;
 759         }
 760
 761         /* the state is made a child of private_data if possible. This means any reply
 762            will be discarded if the private_data goes away */
 763         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 764         CTDB_NO_MEMORY(ctdb, state);
 765
 766         state->reqid = ctdb_reqid_new(ctdb, state);
 767         state->callback = callback;
 768         state->private_data = private_data;
 769         state->ctdb = ctdb;
 770         state->flags = flags;
 771
 772         talloc_set_destructor(state, ctdb_control_destructor);
 773
 774         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 775         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 776                                     struct ctdb_req_control);
 777         CTDB_NO_MEMORY(ctdb, c);
 778         talloc_set_name_const(c, "ctdb_req_control packet");
 779
 780         c->hdr.destnode     = destnode;
 781         c->hdr.reqid        = state->reqid;
 782         c->opcode           = opcode;
 783         c->client_id        = client_id;
 784         c->flags            = flags;
 785         c->srvid            = srvid;
 786         c->datalen          = data.dsize;
 787         if (data.dsize) {
 788                 memcpy(&c->data[0], data.dptr, data.dsize);
 789         }
 790
 791         ctdb_queue_packet(ctdb, &c->hdr);
 792
 793         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 794                 talloc_free(state);
 795                 return 0;
 796         }
 797
 798         if (ctdb->tunable.control_timeout) {
 799                 event_add_timed(ctdb->ev, state,
 800                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 801                                 ctdb_control_timeout, state);
 802         }
 803
 804         talloc_free(c);
 805         return 0;
 806 }