ctdb/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 "replace.h"
  20 #include "system/network.h"
  21 #include "system/filesys.h"
  22 #include "system/wait.h"
  23
  24 #include <talloc.h>
  25 #include <tevent.h>
  26
  27 #include "lib/tdb_wrap/tdb_wrap.h"
  28 #include "lib/util/dlinklist.h"
  29 #include "lib/util/debug.h"
  30 #include "lib/util/samba_util.h"
  31 #include "lib/util/talloc_report.h"
  32
  33 #include "ctdb_private.h"
  34 #include "ctdb_client.h"
  35
  36 #include "common/reqid.h"
  37 #include "common/common.h"
  38 #include "common/logging.h"
  39
  40
  41 struct ctdb_control_state {
  42         struct ctdb_context *ctdb;
  43         uint32_t reqid;
  44         ctdb_control_callback_fn_t callback;
  45         void *private_data;
  46         unsigned flags;
  47 };
  48
  49
  50 /*
  51   dump talloc memory hierarchy, returning it as a blob to the client
  52  */
  53 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  54 {
  55         char *report;
  56         size_t reportlen;
  57
  58         report = talloc_report_str(outdata, NULL);
  59         if (report == NULL) {
  60                 DEBUG(DEBUG_ERR,
  61                       (__location__ " talloc_report_str failed\n"));
  62                 return -1;
  63         }
  64         reportlen = talloc_get_size(report);
  65
  66         if (reportlen > 0) {
  67                 reportlen -= 1; /* strip trailing zero */
  68         }
  69
  70         outdata->dptr = (uint8_t *)report;
  71         outdata->dsize = reportlen;
  72         return 0;
  73 }
  74
  75 static int32_t control_not_implemented(const char *unsupported,
  76                                        const char *alternate)
  77 {
  78         if (alternate == NULL) {
  79                 DEBUG(DEBUG_ERR,
  80                       ("Control %s is not implemented any more\n",
  81                        unsupported));
  82         } else {
  83                 DEBUG(DEBUG_ERR,
  84                       ("Control %s is not implemented any more, use %s instead\n",
  85                        unsupported, alternate));
  86         }
  87         return -1;
  88 }
  89
  90 /*
  91   process a control request
  92  */
  93 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  94                                      struct ctdb_req_control_old *c,
  95                                      TDB_DATA indata,
  96                                      TDB_DATA *outdata, uint32_t srcnode,
  97                                      const char **errormsg,
  98                                      bool *async_reply)
  99 {
 100         uint32_t opcode = c->opcode;
 101         uint64_t srvid = c->srvid;
 102         uint32_t client_id = c->client_id;
 103
 104         switch (opcode) {
 105         case CTDB_CONTROL_PROCESS_EXISTS: {
 106                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
 107                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
 108         }
 109
 110         case CTDB_CONTROL_SET_DEBUG: {
 111                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
 112                 DEBUGLEVEL = *(int32_t *)indata.dptr;
 113                 return 0;
 114         }
 115
 116         case CTDB_CONTROL_GET_DEBUG: {
 117                 CHECK_CONTROL_DATA_SIZE(0);
 118                 outdata->dptr = (uint8_t *)&(DEBUGLEVEL);
 119                 outdata->dsize = sizeof(DEBUGLEVEL);
 120                 return 0;
 121         }
 122
 123         case CTDB_CONTROL_STATISTICS: {
 124                 CHECK_CONTROL_DATA_SIZE(0);
 125                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 126                 ctdb->statistics.num_clients = ctdb->num_clients;
 127                 ctdb->statistics.frozen = (ctdb_db_all_frozen(ctdb) ? 1 : 0);
 128                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 129                 ctdb->statistics.statistics_current_time = timeval_current();
 130
 131                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 132                 outdata->dsize = sizeof(ctdb->statistics);
 133                 return 0;
 134         }
 135
 136         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 137                 CHECK_CONTROL_DATA_SIZE(0);
 138                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 139                 outdata->dsize = sizeof(ctdb->tunable);
 140                 return 0;
 141         }
 142
 143         case CTDB_CONTROL_DUMP_MEMORY: {
 144                 CHECK_CONTROL_DATA_SIZE(0);
 145                 return ctdb_dump_memory(ctdb, outdata);
 146         }
 147
 148         case CTDB_CONTROL_STATISTICS_RESET: {
 149                 struct ctdb_db_context *ctdb_db;
 150
 151                 CHECK_CONTROL_DATA_SIZE(0);
 152                 ZERO_STRUCT(ctdb->statistics);
 153                 for (ctdb_db = ctdb->db_list;
 154                      ctdb_db != NULL;
 155                      ctdb_db = ctdb_db->next) {
 156                         ctdb_db_statistics_reset(ctdb_db);
 157                 }
 158                 ctdb->statistics.statistics_start_time = timeval_current();
 159                 return 0;
 160         }
 161
 162         case CTDB_CONTROL_GETVNNMAP:
 163                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 164
 165         case CTDB_CONTROL_GET_DBMAP:
 166                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 167
 168         case CTDB_CONTROL_GET_NODEMAPv4:
 169                 return control_not_implemented("GET_NODEMAPv4", "GET_NODEMAP");
 170
 171         case CTDB_CONTROL_GET_NODEMAP:
 172                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 173
 174         case CTDB_CONTROL_GET_NODES_FILE:
 175                 return ctdb_control_getnodesfile(ctdb, opcode, indata, outdata);
 176
 177         case CTDB_CONTROL_RELOAD_NODES_FILE:
 178                 CHECK_CONTROL_DATA_SIZE(0);
 179                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 180
 181         case CTDB_CONTROL_SET_DB_STICKY: {
 182                 uint32_t db_id;
 183                 struct ctdb_db_context *ctdb_db;
 184
 185                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 186                 db_id = *(uint32_t *)indata.dptr;
 187                 ctdb_db = find_ctdb_db(ctdb, db_id);
 188                 if (ctdb_db == NULL) return -1;
 189                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 190         }
 191
 192         case CTDB_CONTROL_SETVNNMAP:
 193                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 194
 195         case CTDB_CONTROL_PULL_DB:
 196                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb));
 197                 return ctdb_control_pull_db(ctdb, indata, outdata);
 198
 199         case CTDB_CONTROL_SET_DMASTER:
 200                 return control_not_implemented("SET_DMASTER", NULL);
 201
 202         case CTDB_CONTROL_PUSH_DB:
 203                 return ctdb_control_push_db(ctdb, indata);
 204
 205         case CTDB_CONTROL_GET_RECMODE: {
 206                 return ctdb->recovery_mode;
 207         }
 208
 209         case CTDB_CONTROL_SET_RECMASTER: {
 210                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 211         }
 212
 213         case CTDB_CONTROL_GET_RECMASTER:
 214                 return ctdb->recovery_master;
 215
 216         case CTDB_CONTROL_GET_PID:
 217                 return getpid();
 218
 219         case CTDB_CONTROL_GET_PNN:
 220                 return ctdb->pnn;
 221
 222         case CTDB_CONTROL_PING:
 223                 CHECK_CONTROL_DATA_SIZE(0);
 224                 return ctdb->num_clients;
 225
 226         case CTDB_CONTROL_GET_RUNSTATE:
 227                 CHECK_CONTROL_DATA_SIZE(0);
 228                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 229                 outdata->dsize = sizeof(uint32_t);
 230                 return 0;
 231
 232
 233         case CTDB_CONTROL_SET_DB_READONLY: {
 234                 uint32_t db_id;
 235                 struct ctdb_db_context *ctdb_db;
 236
 237                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 238                 db_id = *(uint32_t *)indata.dptr;
 239                 ctdb_db = find_ctdb_db(ctdb, db_id);
 240                 if (ctdb_db == NULL) return -1;
 241                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 242         }
 243         case CTDB_CONTROL_GET_DBNAME: {
 244                 uint32_t db_id;
 245                 struct ctdb_db_context *ctdb_db;
 246
 247                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 248                 db_id = *(uint32_t *)indata.dptr;
 249                 ctdb_db = find_ctdb_db(ctdb, db_id);
 250                 if (ctdb_db == NULL) return -1;
 251                 outdata->dptr = discard_const(ctdb_db->db_name);
 252                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 253                 return 0;
 254         }
 255
 256         case CTDB_CONTROL_GETDBPATH: {
 257                 uint32_t db_id;
 258                 struct ctdb_db_context *ctdb_db;
 259
 260                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 261                 db_id = *(uint32_t *)indata.dptr;
 262                 ctdb_db = find_ctdb_db(ctdb, db_id);
 263                 if (ctdb_db == NULL) return -1;
 264                 outdata->dptr = discard_const(ctdb_db->db_path);
 265                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 266                 return 0;
 267         }
 268
 269         case CTDB_CONTROL_DB_ATTACH:
 270           return ctdb_control_db_attach(ctdb, indata, outdata, 0, client_id,
 271                                         c, async_reply);
 272
 273         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 274           return ctdb_control_db_attach(ctdb, indata, outdata,
 275                                         CTDB_DB_FLAGS_PERSISTENT, client_id,
 276                                         c, async_reply);
 277
 278         case CTDB_CONTROL_DB_ATTACH_REPLICATED:
 279           return ctdb_control_db_attach(ctdb, indata, outdata,
 280                                         CTDB_DB_FLAGS_REPLICATED, client_id,
 281                                         c, async_reply);
 282
 283         case CTDB_CONTROL_SET_CALL:
 284                 return control_not_implemented("SET_CALL", NULL);
 285
 286         case CTDB_CONTROL_TRAVERSE_START:
 287                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 288                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 289
 290         case CTDB_CONTROL_TRAVERSE_START_EXT:
 291                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 292                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 293
 294         case CTDB_CONTROL_TRAVERSE_ALL:
 295                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 296
 297         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 298                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 299
 300         case CTDB_CONTROL_TRAVERSE_DATA:
 301                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 302
 303         case CTDB_CONTROL_TRAVERSE_KILL:
 304                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 305                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 306
 307         case CTDB_CONTROL_REGISTER_SRVID:
 308                 return daemon_register_message_handler(ctdb, client_id, srvid);
 309
 310         case CTDB_CONTROL_DEREGISTER_SRVID:
 311                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 312
 313         case CTDB_CONTROL_CHECK_SRVIDS:
 314                 return daemon_check_srvids(ctdb, indata, outdata);
 315
 316         case CTDB_CONTROL_ENABLE_SEQNUM:
 317                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 318                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 319
 320         case CTDB_CONTROL_UPDATE_SEQNUM:
 321                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 322                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 323
 324         case CTDB_CONTROL_FREEZE:
 325                 CHECK_CONTROL_DATA_SIZE(0);
 326                 return ctdb_control_freeze(ctdb, c, async_reply);
 327
 328         case CTDB_CONTROL_THAW:
 329                 return control_not_implemented("THAW", NULL);
 330
 331         case CTDB_CONTROL_SET_RECMODE:
 332                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 333                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 334
 335         case CTDB_CONTROL_GET_MONMODE:
 336                 CHECK_CONTROL_DATA_SIZE(0);
 337                 return ctdb_monitoring_mode(ctdb);
 338
 339         case CTDB_CONTROL_ENABLE_MONITOR:
 340                 CHECK_CONTROL_DATA_SIZE(0);
 341                 ctdb_enable_monitoring(ctdb);
 342                 return 0;
 343
 344         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 345                 return control_not_implemented("RUN_EVENTSCRIPTS", NULL);
 346
 347         case CTDB_CONTROL_DISABLE_MONITOR:
 348                 CHECK_CONTROL_DATA_SIZE(0);
 349                 ctdb_disable_monitoring(ctdb);
 350                 return 0;
 351
 352         case CTDB_CONTROL_SHUTDOWN:
 353                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command.\n"));
 354                 ctdb_shutdown_sequence(ctdb, 0);
 355                 /* In case above returns due to duplicate shutdown */
 356                 return 0;
 357
 358         case CTDB_CONTROL_TAKEOVER_IPv4:
 359                 return control_not_implemented("TAKEOVER_IPv4", "TAKEOVER_IP");
 360
 361         case CTDB_CONTROL_TAKEOVER_IP:
 362                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 363                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 364
 365         case CTDB_CONTROL_RELEASE_IPv4:
 366                 return control_not_implemented("RELEASE_IPv4", "RELEASE_IP");
 367
 368         case CTDB_CONTROL_RELEASE_IP:
 369                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 370                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 371
 372         case CTDB_CONTROL_IPREALLOCATED:
 373                 CHECK_CONTROL_DATA_SIZE(0);
 374                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 375
 376         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 377                 return control_not_implemented("GET_PUBLIC_IPSv4",
 378                                                "GET_PUBLIC_IPS");
 379
 380         case CTDB_CONTROL_GET_PUBLIC_IPS:
 381                 CHECK_CONTROL_DATA_SIZE(0);
 382                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 383
 384         case CTDB_CONTROL_TCP_CLIENT:
 385                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 386                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 387
 388         case CTDB_CONTROL_STARTUP:
 389                 CHECK_CONTROL_DATA_SIZE(0);
 390                 return ctdb_control_startup(ctdb, srcnode);
 391
 392         case CTDB_CONTROL_TCP_ADD:
 393                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 394                 return ctdb_control_tcp_add(ctdb, indata, false);
 395
 396         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 397                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 398                 return ctdb_control_tcp_add(ctdb, indata, true);
 399
 400         case CTDB_CONTROL_TCP_REMOVE:
 401                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 402                 return ctdb_control_tcp_remove(ctdb, indata);
 403
 404         case CTDB_CONTROL_SET_TUNABLE:
 405                 return ctdb_control_set_tunable(ctdb, indata);
 406
 407         case CTDB_CONTROL_GET_TUNABLE:
 408                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 409
 410         case CTDB_CONTROL_LIST_TUNABLES:
 411                 return ctdb_control_list_tunables(ctdb, outdata);
 412
 413         case CTDB_CONTROL_MODIFY_FLAGS:
 414                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 415                 return ctdb_control_modflags(ctdb, indata);
 416
 417         case CTDB_CONTROL_KILL_TCP:
 418                 return control_not_implemented("KILL_TCP", NULL);
 419
 420         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 421                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 422                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 423
 424         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 425                 /* data size is verified in the called function */
 426                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 427
 428         case CTDB_CONTROL_REGISTER_SERVER_ID:
 429                 return control_not_implemented("REGISTER_SERVER_ID", NULL);
 430
 431         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 432                 return control_not_implemented("UNREGISTER_SERVER_ID", NULL);
 433
 434         case CTDB_CONTROL_CHECK_SERVER_ID:
 435                 return control_not_implemented("CHECK_SERVER_ID", NULL);
 436
 437         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 438                 return control_not_implemented("SERVER_ID_LIST", NULL);
 439
 440         case CTDB_CONTROL_PERSISTENT_STORE:
 441                 return control_not_implemented("PERSISTENT_STORE", NULL);
 442
 443         case CTDB_CONTROL_UPDATE_RECORD:
 444                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 445
 446         case CTDB_CONTROL_SEND_GRATUITOUS_ARP:
 447                 return ctdb_control_send_gratious_arp(ctdb, indata);
 448
 449         case CTDB_CONTROL_TRANSACTION_START:
 450                 return control_not_implemented("TRANSACTION_START", NULL);
 451
 452         case CTDB_CONTROL_TRANSACTION_COMMIT:
 453                 return control_not_implemented("TRANSACTION_COMMIT", NULL);
 454
 455         case CTDB_CONTROL_WIPE_DATABASE:
 456                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 457                 return ctdb_control_wipe_database(ctdb, indata);
 458
 459         case CTDB_CONTROL_UPTIME:
 460                 return ctdb_control_uptime(ctdb, outdata);
 461
 462         case CTDB_CONTROL_START_RECOVERY:
 463                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 464
 465         case CTDB_CONTROL_END_RECOVERY:
 466                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 467
 468         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 469                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 470
 471         case CTDB_CONTROL_ADD_PUBLIC_IP:
 472                 return ctdb_control_add_public_address(ctdb, indata);
 473
 474         case CTDB_CONTROL_DEL_PUBLIC_IP:
 475                 return ctdb_control_del_public_address(ctdb, indata);
 476
 477         case CTDB_CONTROL_GET_CAPABILITIES:
 478                 return ctdb_control_get_capabilities(ctdb, outdata);
 479
 480         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 481                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 482
 483         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 484                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 485
 486         case CTDB_CONTROL_TRANS2_COMMIT:
 487         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 488                 return control_not_implemented("TRANS2_COMMIT", "TRANS3_COMMIT");
 489
 490         case CTDB_CONTROL_TRANS2_ERROR:
 491                 return control_not_implemented("TRANS2_ERROR", NULL);
 492
 493         case CTDB_CONTROL_TRANS2_FINISHED:
 494                 return control_not_implemented("TRANS2_FINISHED", NULL);
 495
 496         case CTDB_CONTROL_TRANS2_ACTIVE:
 497                 return control_not_implemented("TRANS2_ACTIVE", NULL);
 498
 499         case CTDB_CONTROL_TRANS3_COMMIT:
 500                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 501
 502         case CTDB_CONTROL_RECD_PING:
 503                 CHECK_CONTROL_DATA_SIZE(0);
 504                 return ctdb_control_recd_ping(ctdb);
 505
 506         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 507                 return control_not_implemented("GET_EVENT_SCRIPT_STATUS", NULL);
 508
 509         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 510                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 511                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 512                 return 0;
 513         case CTDB_CONTROL_GET_RECLOCK_FILE:
 514                 CHECK_CONTROL_DATA_SIZE(0);
 515                 if (ctdb->recovery_lock != NULL) {
 516                         outdata->dptr  = discard_const(ctdb->recovery_lock);
 517                         outdata->dsize = strlen(ctdb->recovery_lock) + 1;
 518                 }
 519                 return 0;
 520         case CTDB_CONTROL_SET_RECLOCK_FILE:
 521                 return control_not_implemented("SET_RECLOCK", NULL);
 522
 523         case CTDB_CONTROL_STOP_NODE:
 524                 CHECK_CONTROL_DATA_SIZE(0);
 525                 return ctdb_control_stop_node(ctdb);
 526
 527         case CTDB_CONTROL_CONTINUE_NODE:
 528                 CHECK_CONTROL_DATA_SIZE(0);
 529                 return ctdb_control_continue_node(ctdb);
 530
 531         case CTDB_CONTROL_SET_NATGWSTATE:
 532                 return control_not_implemented("SET_NATGWSTATE", NULL);
 533
 534         case CTDB_CONTROL_SET_LMASTERROLE: {
 535                 uint32_t lmasterrole;
 536
 537                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 538                 lmasterrole = *(uint32_t *)indata.dptr;
 539                 if (lmasterrole == 0) {
 540                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 541                 } else {
 542                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 543                 }
 544                 return 0;
 545         }
 546
 547         case CTDB_CONTROL_SET_RECMASTERROLE: {
 548                 uint32_t recmasterrole;
 549
 550                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 551                 recmasterrole = *(uint32_t *)indata.dptr;
 552                 if (recmasterrole == 0) {
 553                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 554                 } else {
 555                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 556                 }
 557                 return 0;
 558         }
 559
 560         case CTDB_CONTROL_ENABLE_SCRIPT:
 561                 return control_not_implemented("ENABLE_SCRIPT", NULL);
 562
 563         case CTDB_CONTROL_DISABLE_SCRIPT:
 564                 return control_not_implemented("DISABLE_SCRIPT", NULL);
 565
 566         case CTDB_CONTROL_SET_BAN_STATE:
 567                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_state));
 568                 return ctdb_control_set_ban_state(ctdb, indata);
 569
 570         case CTDB_CONTROL_GET_BAN_STATE:
 571                 CHECK_CONTROL_DATA_SIZE(0);
 572                 return ctdb_control_get_ban_state(ctdb, outdata);
 573
 574         case CTDB_CONTROL_SET_DB_PRIORITY:
 575                 return control_not_implemented("SET_DB_PRIORITY", NULL);
 576
 577         case CTDB_CONTROL_GET_DB_PRIORITY:
 578                 return control_not_implemented("GET_DB_PRIORITY", NULL);
 579
 580         case CTDB_CONTROL_TRANSACTION_CANCEL:
 581                 return control_not_implemented("TRANSACTION_CANCEL", NULL);
 582
 583         case CTDB_CONTROL_REGISTER_NOTIFY:
 584                 return ctdb_control_register_notify(ctdb, client_id, indata);
 585
 586         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 587                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 588                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 589
 590         case CTDB_CONTROL_GET_LOG:
 591                 return control_not_implemented("GET_LOG", NULL);
 592
 593         case CTDB_CONTROL_CLEAR_LOG:
 594                 return control_not_implemented("CLEAR_LOG", NULL);
 595
 596         case CTDB_CONTROL_GET_DB_SEQNUM:
 597                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 598                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 599
 600         case CTDB_CONTROL_DB_SET_HEALTHY:
 601                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 602                 return ctdb_control_db_set_healthy(ctdb, indata);
 603
 604         case CTDB_CONTROL_DB_GET_HEALTH:
 605                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 606                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 607
 608         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 609                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 610                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 611
 612         case CTDB_CONTROL_GET_IFACES:
 613                 CHECK_CONTROL_DATA_SIZE(0);
 614                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 615
 616         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 617                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_iface));
 618                 return ctdb_control_set_iface_link(ctdb, c, indata);
 619
 620         case CTDB_CONTROL_GET_STAT_HISTORY:
 621                 CHECK_CONTROL_DATA_SIZE(0);
 622                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 623
 624         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 625                 struct ctdb_control_schedule_for_deletion *d;
 626                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 627                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 628                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 629                 size += d->keylen;
 630                 CHECK_CONTROL_DATA_SIZE(size);
 631                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 632         }
 633         case CTDB_CONTROL_GET_DB_STATISTICS:
 634                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 635                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 636
 637         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 638                 CHECK_CONTROL_DATA_SIZE(0);
 639                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 640
 641         case CTDB_CONTROL_RECEIVE_RECORDS:
 642                 return ctdb_control_receive_records(ctdb, indata, outdata);
 643
 644         case CTDB_CONTROL_DB_DETACH:
 645                 return ctdb_control_db_detach(ctdb, indata, client_id);
 646
 647         case CTDB_CONTROL_DB_FREEZE:
 648                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 649                 return ctdb_control_db_freeze(ctdb, c, *(uint32_t *)indata.dptr,
 650                                               async_reply);
 651
 652         case CTDB_CONTROL_DB_THAW:
 653                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 654                 return ctdb_control_db_thaw(ctdb, *(uint32_t *)indata.dptr);
 655
 656         case CTDB_CONTROL_DB_TRANSACTION_START:
 657                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 658                 return ctdb_control_db_transaction_start(ctdb, indata);
 659
 660         case CTDB_CONTROL_DB_TRANSACTION_COMMIT:
 661                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 662                 return ctdb_control_db_transaction_commit(ctdb, indata);
 663
 664         case CTDB_CONTROL_DB_TRANSACTION_CANCEL:
 665                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 666                 return ctdb_control_db_transaction_cancel(ctdb, indata);
 667
 668         case CTDB_CONTROL_DB_PULL:
 669                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 670                 return ctdb_control_db_pull(ctdb, c, indata, outdata);
 671
 672         case CTDB_CONTROL_DB_PUSH_START:
 673                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 674                 return ctdb_control_db_push_start(ctdb, indata);
 675
 676         case CTDB_CONTROL_DB_PUSH_CONFIRM:
 677                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 678                 return ctdb_control_db_push_confirm(ctdb, indata, outdata);
 679
 680         case CTDB_CONTROL_DB_OPEN_FLAGS: {
 681                 uint32_t db_id;
 682                 struct ctdb_db_context *ctdb_db;
 683                 int tdb_flags;
 684
 685                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 686                 db_id = *(uint32_t *)indata.dptr;
 687                 ctdb_db = find_ctdb_db(ctdb, db_id);
 688                 if (ctdb_db == NULL) {
 689                         return -1;
 690                 }
 691
 692                 tdb_flags = tdb_get_flags(ctdb_db->ltdb->tdb);
 693
 694                 outdata->dptr = talloc_size(outdata, sizeof(tdb_flags));
 695                 if (outdata->dptr == NULL) {
 696                         return -1;
 697                 }
 698
 699                 outdata->dsize = sizeof(tdb_flags);
 700                 memcpy(outdata->dptr, &tdb_flags, outdata->dsize);
 701                 return 0;
 702         }
 703
 704         default:
 705                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 706                 return -1;
 707         }
 708 }
 709
 710 /*
 711   send a reply for a ctdb control
 712  */
 713 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control_old *c,
 714                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 715 {
 716         struct ctdb_reply_control_old *r;
 717         size_t len;
 718
 719         /* some controls send no reply */
 720         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 721                 return;
 722         }
 723
 724         len = offsetof(struct ctdb_reply_control_old, data) + (outdata?outdata->dsize:0);
 725         if (errormsg) {
 726                 len += strlen(errormsg);
 727         }
 728         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control_old);
 729         if (r == NULL) {
 730                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 731                 return;
 732         }
 733
 734         r->hdr.destnode     = c->hdr.srcnode;
 735         r->hdr.reqid        = c->hdr.reqid;
 736         r->status           = status;
 737         r->datalen          = outdata?outdata->dsize:0;
 738         if (outdata && outdata->dsize) {
 739                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 740         }
 741         if (errormsg) {
 742                 r->errorlen = strlen(errormsg);
 743                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 744         }
 745
 746         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 747
 748         talloc_free(r);
 749 }
 750
 751 /*
 752   called when a CTDB_REQ_CONTROL packet comes in
 753 */
 754 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 755 {
 756         struct ctdb_req_control_old *c = (struct ctdb_req_control_old *)hdr;
 757         TDB_DATA data, *outdata;
 758         int32_t status;
 759         bool async_reply = false;
 760         const char *errormsg = NULL;
 761
 762         data.dptr = &c->data[0];
 763         data.dsize = c->datalen;
 764
 765         outdata = talloc_zero(c, TDB_DATA);
 766
 767         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 768                                        &errormsg, &async_reply);
 769
 770         if (!async_reply) {
 771                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 772         }
 773 }
 774
 775 /*
 776   called when a CTDB_REPLY_CONTROL packet comes in
 777 */
 778 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 779 {
 780         struct ctdb_reply_control_old *c = (struct ctdb_reply_control_old *)hdr;
 781         TDB_DATA data;
 782         struct ctdb_control_state *state;
 783         const char *errormsg = NULL;
 784
 785         state = reqid_find(ctdb->idr, hdr->reqid, struct ctdb_control_state);
 786         if (state == NULL) {
 787                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 788                          ctdb->pnn, hdr->reqid));
 789                 return;
 790         }
 791
 792         if (hdr->reqid != state->reqid) {
 793                 /* we found a record  but it was the wrong one */
 794                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 795                 return;
 796         }
 797
 798         data.dptr = &c->data[0];
 799         data.dsize = c->datalen;
 800         if (c->errorlen) {
 801                 errormsg = talloc_strndup(state,
 802                                           (char *)&c->data[c->datalen], c->errorlen);
 803         }
 804
 805         /* make state a child of the packet, so it goes away when the packet
 806            is freed. */
 807         talloc_steal(hdr, state);
 808
 809         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 810 }
 811
 812 static int ctdb_control_destructor(struct ctdb_control_state *state)
 813 {
 814         reqid_remove(state->ctdb->idr, state->reqid);
 815         return 0;
 816 }
 817
 818 /*
 819   handle a timeout of a control
 820  */
 821 static void ctdb_control_timeout(struct tevent_context *ev,
 822                                  struct tevent_timer *te,
 823                                  struct timeval t, void *private_data)
 824 {
 825         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 826         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 827
 828         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 829
 830         talloc_steal(tmp_ctx, state);
 831
 832         state->callback(state->ctdb, -1, tdb_null,
 833                         "ctdb_control timed out",
 834                         state->private_data);
 835         talloc_free(tmp_ctx);
 836 }
 837
 838
 839 /*
 840   send a control message to a node
 841  */
 842 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 843                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 844                              uint32_t flags,
 845                              TDB_DATA data,
 846                              ctdb_control_callback_fn_t callback,
 847                              void *private_data)
 848 {
 849         struct ctdb_req_control_old *c;
 850         struct ctdb_control_state *state;
 851         size_t len;
 852
 853         if (ctdb->methods == NULL) {
 854                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 855                 return -1;
 856         }
 857
 858         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 859              (destnode == CTDB_BROADCAST_ALL) ||
 860              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 861             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 862                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 863                 return -1;
 864         }
 865
 866         if (destnode != CTDB_BROADCAST_VNNMAP &&
 867             destnode != CTDB_BROADCAST_ALL &&
 868             destnode != CTDB_BROADCAST_CONNECTED &&
 869             (!ctdb_validate_pnn(ctdb, destnode) ||
 870              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 871                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 872                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 873                 }
 874                 return 0;
 875         }
 876
 877         /* the state is made a child of private_data if possible. This means any reply
 878            will be discarded if the private_data goes away */
 879         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 880         CTDB_NO_MEMORY(ctdb, state);
 881
 882         state->reqid = reqid_new(ctdb->idr, state);
 883         state->callback = callback;
 884         state->private_data = private_data;
 885         state->ctdb = ctdb;
 886         state->flags = flags;
 887
 888         talloc_set_destructor(state, ctdb_control_destructor);
 889
 890         len = offsetof(struct ctdb_req_control_old, data) + data.dsize;
 891         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 892                                     struct ctdb_req_control_old);
 893         CTDB_NO_MEMORY(ctdb, c);
 894         talloc_set_name_const(c, "ctdb_req_control packet");
 895
 896         c->hdr.destnode     = destnode;
 897         c->hdr.reqid        = state->reqid;
 898         c->opcode           = opcode;
 899         c->client_id        = client_id;
 900         c->flags            = flags;
 901         c->srvid            = srvid;
 902         c->datalen          = data.dsize;
 903         if (data.dsize) {
 904                 memcpy(&c->data[0], data.dptr, data.dsize);
 905         }
 906
 907         ctdb_queue_packet(ctdb, &c->hdr);
 908
 909         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 910                 talloc_free(state);
 911                 return 0;
 912         }
 913
 914         if (ctdb->tunable.control_timeout) {
 915                 tevent_add_timer(ctdb->ev, state,
 916                                  timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 917                                  ctdb_control_timeout, state);
 918         }
 919
 920         talloc_free(c);
 921         return 0;
 922 }