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 "includes.h"
  20 #include "tdb.h"
  21 #include "system/network.h"
  22 #include "system/filesys.h"
  23 #include "system/wait.h"
  24 #include "../include/ctdb_private.h"
  25 #include "lib/util/dlinklist.h"
  26 #include "lib/tdb_wrap/tdb_wrap.h"
  27
  28
  29 struct ctdb_control_state {
  30         struct ctdb_context *ctdb;
  31         uint32_t reqid;
  32         ctdb_control_callback_fn_t callback;
  33         void *private_data;
  34         unsigned flags;
  35 };
  36
  37
  38 /*
  39   dump talloc memory hierarchy, returning it as a blob to the client
  40  */
  41 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  42 {
  43         /* dump to a file, then send the file as a blob */
  44         FILE *f;
  45         long fsize;
  46         f = tmpfile();
  47         if (f == NULL) {
  48                 DEBUG(DEBUG_ERR,(__location__ " Unable to open tmpfile - %s\n", strerror(errno)));
  49                 return -1;
  50         }
  51         talloc_report_full(NULL, f);
  52         fsize = ftell(f);
  53         if (fsize == -1) {
  54                 DEBUG(DEBUG_ERR, (__location__ " Unable to get file size - %s\n",
  55                                   strerror(errno)));
  56                 fclose(f);
  57                 return -1;
  58         }
  59         rewind(f);
  60         outdata->dptr = talloc_size(outdata, fsize);
  61         if (outdata->dptr == NULL) {
  62                 fclose(f);
  63                 CTDB_NO_MEMORY(ctdb, outdata->dptr);
  64         }
  65         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  66         fclose(f);
  67         if (outdata->dsize != fsize) {
  68                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  69                 return -1;
  70         }
  71         return 0;
  72 }
  73
  74 static int32_t control_not_implemented(const char *unsupported,
  75                                        const char *alternate)
  76 {
  77         if (alternate == NULL) {
  78                 DEBUG(DEBUG_ERR,
  79                       ("Control %s is not implemented any more\n",
  80                        unsupported));
  81         } else {
  82                 DEBUG(DEBUG_ERR,
  83                       ("Control %s is not implemented any more, use %s instead\n",
  84                        unsupported, alternate));
  85         }
  86         return -1;
  87 }
  88
  89 /*
  90   process a control request
  91  */
  92 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  93                                      struct ctdb_req_control *c,
  94                                      TDB_DATA indata,
  95                                      TDB_DATA *outdata, uint32_t srcnode,
  96                                      const char **errormsg,
  97                                      bool *async_reply)
  98 {
  99         uint32_t opcode = c->opcode;
 100         uint64_t srvid = c->srvid;
 101         uint32_t client_id = c->client_id;
 102
 103         switch (opcode) {
 104         case CTDB_CONTROL_PROCESS_EXISTS: {
 105                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
 106                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
 107         }
 108
 109         case CTDB_CONTROL_SET_DEBUG: {
 110                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
 111                 DEBUGLEVEL = *(int32_t *)indata.dptr;
 112                 return 0;
 113         }
 114
 115         case CTDB_CONTROL_GET_DEBUG: {
 116                 CHECK_CONTROL_DATA_SIZE(0);
 117                 outdata->dptr = (uint8_t *)&(DEBUGLEVEL);
 118                 outdata->dsize = sizeof(DEBUGLEVEL);
 119                 return 0;
 120         }
 121
 122         case CTDB_CONTROL_STATISTICS: {
 123                 int i;
 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 = 0;
 128                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 129                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 130                                 ctdb->statistics.frozen = 1;
 131                         }
 132                 }
 133                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 134                 ctdb->statistics.statistics_current_time = timeval_current();
 135
 136                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 137                 outdata->dsize = sizeof(ctdb->statistics);
 138                 return 0;
 139         }
 140
 141         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 142                 CHECK_CONTROL_DATA_SIZE(0);
 143                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 144                 outdata->dsize = sizeof(ctdb->tunable);
 145                 return 0;
 146         }
 147
 148         case CTDB_CONTROL_DUMP_MEMORY: {
 149                 CHECK_CONTROL_DATA_SIZE(0);
 150                 return ctdb_dump_memory(ctdb, outdata);
 151         }
 152
 153         case CTDB_CONTROL_STATISTICS_RESET: {
 154                 CHECK_CONTROL_DATA_SIZE(0);
 155                 ZERO_STRUCT(ctdb->statistics);
 156                 ctdb->statistics.statistics_start_time = timeval_current();
 157                 return 0;
 158         }
 159
 160         case CTDB_CONTROL_GETVNNMAP:
 161                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 162
 163         case CTDB_CONTROL_GET_DBMAP:
 164                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 165
 166         case CTDB_CONTROL_GET_NODEMAPv4:
 167                 return ctdb_control_getnodemapv4(ctdb, opcode, indata, outdata);
 168
 169         case CTDB_CONTROL_GET_NODEMAP:
 170                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 171
 172         case CTDB_CONTROL_RELOAD_NODES_FILE:
 173                 CHECK_CONTROL_DATA_SIZE(0);
 174                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 175
 176         case CTDB_CONTROL_SET_DB_STICKY: {
 177                 uint32_t db_id;
 178                 struct ctdb_db_context *ctdb_db;
 179
 180                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 181                 db_id = *(uint32_t *)indata.dptr;
 182                 ctdb_db = find_ctdb_db(ctdb, db_id);
 183                 if (ctdb_db == NULL) return -1;
 184                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 185         }
 186
 187         case CTDB_CONTROL_SETVNNMAP:
 188                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 189
 190         case CTDB_CONTROL_PULL_DB:
 191                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 192                 return ctdb_control_pull_db(ctdb, indata, outdata);
 193
 194         case CTDB_CONTROL_SET_DMASTER:
 195                 return control_not_implemented("SET_DMASTER", NULL);
 196
 197         case CTDB_CONTROL_PUSH_DB:
 198                 return ctdb_control_push_db(ctdb, indata);
 199
 200         case CTDB_CONTROL_GET_RECMODE: {
 201                 return ctdb->recovery_mode;
 202         }
 203
 204         case CTDB_CONTROL_SET_RECMASTER: {
 205                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 206         }
 207
 208         case CTDB_CONTROL_GET_RECMASTER:
 209                 return ctdb->recovery_master;
 210
 211         case CTDB_CONTROL_GET_PID:
 212                 return getpid();
 213
 214         case CTDB_CONTROL_GET_PNN:
 215                 return ctdb->pnn;
 216
 217         case CTDB_CONTROL_PING:
 218                 CHECK_CONTROL_DATA_SIZE(0);
 219                 return ctdb->num_clients;
 220
 221         case CTDB_CONTROL_GET_RUNSTATE:
 222                 CHECK_CONTROL_DATA_SIZE(0);
 223                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 224                 outdata->dsize = sizeof(uint32_t);
 225                 return 0;
 226
 227
 228         case CTDB_CONTROL_SET_DB_READONLY: {
 229                 uint32_t db_id;
 230                 struct ctdb_db_context *ctdb_db;
 231
 232                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 233                 db_id = *(uint32_t *)indata.dptr;
 234                 ctdb_db = find_ctdb_db(ctdb, db_id);
 235                 if (ctdb_db == NULL) return -1;
 236                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 237         }
 238         case CTDB_CONTROL_GET_DBNAME: {
 239                 uint32_t db_id;
 240                 struct ctdb_db_context *ctdb_db;
 241
 242                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 243                 db_id = *(uint32_t *)indata.dptr;
 244                 ctdb_db = find_ctdb_db(ctdb, db_id);
 245                 if (ctdb_db == NULL) return -1;
 246                 outdata->dptr = discard_const(ctdb_db->db_name);
 247                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 248                 return 0;
 249         }
 250
 251         case CTDB_CONTROL_GETDBPATH: {
 252                 uint32_t db_id;
 253                 struct ctdb_db_context *ctdb_db;
 254
 255                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 256                 db_id = *(uint32_t *)indata.dptr;
 257                 ctdb_db = find_ctdb_db(ctdb, db_id);
 258                 if (ctdb_db == NULL) return -1;
 259                 outdata->dptr = discard_const(ctdb_db->db_path);
 260                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 261                 return 0;
 262         }
 263
 264         case CTDB_CONTROL_DB_ATTACH:
 265           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 266
 267         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 268           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 269
 270         case CTDB_CONTROL_SET_CALL: {
 271                 struct ctdb_control_set_call *sc =
 272                         (struct ctdb_control_set_call *)indata.dptr;
 273                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 274                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 275         }
 276
 277         case CTDB_CONTROL_TRAVERSE_START:
 278                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 279                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 280
 281         case CTDB_CONTROL_TRAVERSE_START_EXT:
 282                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 283                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 284
 285         case CTDB_CONTROL_TRAVERSE_ALL:
 286                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 287
 288         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 289                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 290
 291         case CTDB_CONTROL_TRAVERSE_DATA:
 292                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 293
 294         case CTDB_CONTROL_TRAVERSE_KILL:
 295                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 296                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 297
 298         case CTDB_CONTROL_REGISTER_SRVID:
 299                 return daemon_register_message_handler(ctdb, client_id, srvid);
 300
 301         case CTDB_CONTROL_DEREGISTER_SRVID:
 302                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 303
 304         case CTDB_CONTROL_CHECK_SRVIDS:
 305                 return daemon_check_srvids(ctdb, indata, outdata);
 306
 307         case CTDB_CONTROL_ENABLE_SEQNUM:
 308                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 309                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 310
 311         case CTDB_CONTROL_UPDATE_SEQNUM:
 312                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 313                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 314
 315         case CTDB_CONTROL_FREEZE:
 316                 CHECK_CONTROL_DATA_SIZE(0);
 317                 return ctdb_control_freeze(ctdb, c, async_reply);
 318
 319         case CTDB_CONTROL_THAW:
 320                 CHECK_CONTROL_DATA_SIZE(0);
 321                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid, true);
 322
 323         case CTDB_CONTROL_SET_RECMODE:
 324                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 325                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 326
 327         case CTDB_CONTROL_GET_MONMODE:
 328                 CHECK_CONTROL_DATA_SIZE(0);
 329                 return ctdb_monitoring_mode(ctdb);
 330
 331         case CTDB_CONTROL_ENABLE_MONITOR:
 332                 CHECK_CONTROL_DATA_SIZE(0);
 333                 ctdb_enable_monitoring(ctdb);
 334                 return 0;
 335
 336         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 337                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 338
 339         case CTDB_CONTROL_DISABLE_MONITOR:
 340                 CHECK_CONTROL_DATA_SIZE(0);
 341                 ctdb_disable_monitoring(ctdb);
 342                 return 0;
 343
 344         case CTDB_CONTROL_SHUTDOWN:
 345                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command.\n"));
 346                 ctdb_shutdown_sequence(ctdb, 0);
 347                 /* In case above returns due to duplicate shutdown */
 348                 return 0;
 349
 350         case CTDB_CONTROL_TAKEOVER_IPv4:
 351                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 352                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 353
 354         case CTDB_CONTROL_TAKEOVER_IP:
 355                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 356                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 357
 358         case CTDB_CONTROL_RELEASE_IPv4:
 359                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 360                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 361
 362         case CTDB_CONTROL_RELEASE_IP:
 363                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 364                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 365
 366         case CTDB_CONTROL_IPREALLOCATED:
 367                 CHECK_CONTROL_DATA_SIZE(0);
 368                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 369
 370         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 371                 CHECK_CONTROL_DATA_SIZE(0);
 372                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 373
 374         case CTDB_CONTROL_GET_PUBLIC_IPS:
 375                 CHECK_CONTROL_DATA_SIZE(0);
 376                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 377
 378         case CTDB_CONTROL_TCP_CLIENT:
 379                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 380
 381         case CTDB_CONTROL_STARTUP:
 382                 CHECK_CONTROL_DATA_SIZE(0);
 383                 return ctdb_control_startup(ctdb, srcnode);
 384
 385         case CTDB_CONTROL_TCP_ADD:
 386                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 387                 return ctdb_control_tcp_add(ctdb, indata, false);
 388
 389         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 390                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 391                 return ctdb_control_tcp_add(ctdb, indata, true);
 392
 393         case CTDB_CONTROL_TCP_REMOVE:
 394                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 395                 return ctdb_control_tcp_remove(ctdb, indata);
 396
 397         case CTDB_CONTROL_SET_TUNABLE:
 398                 return ctdb_control_set_tunable(ctdb, indata);
 399
 400         case CTDB_CONTROL_GET_TUNABLE:
 401                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 402
 403         case CTDB_CONTROL_LIST_TUNABLES:
 404                 return ctdb_control_list_tunables(ctdb, outdata);
 405
 406         case CTDB_CONTROL_MODIFY_FLAGS:
 407                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 408                 return ctdb_control_modflags(ctdb, indata);
 409
 410         case CTDB_CONTROL_KILL_TCP:
 411                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 412                 return ctdb_control_kill_tcp(ctdb, indata);
 413
 414         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 415                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 416                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 417
 418         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 419                 /* data size is verified in the called function */
 420                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 421
 422         case CTDB_CONTROL_REGISTER_SERVER_ID:
 423                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 424                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 425
 426         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 427                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 428                 return ctdb_control_unregister_server_id(ctdb, indata);
 429
 430         case CTDB_CONTROL_CHECK_SERVER_ID:
 431                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 432                 return ctdb_control_check_server_id(ctdb, indata);
 433
 434         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 435                 CHECK_CONTROL_DATA_SIZE(0);
 436                 return ctdb_control_get_server_id_list(ctdb, outdata);
 437
 438         case CTDB_CONTROL_PERSISTENT_STORE:
 439                 return control_not_implemented("PERSISTENT_STORE", NULL);
 440
 441         case CTDB_CONTROL_UPDATE_RECORD:
 442                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 443
 444         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 445                 return ctdb_control_send_gratious_arp(ctdb, indata);
 446
 447         case CTDB_CONTROL_TRANSACTION_START:
 448                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 449                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 450
 451         case CTDB_CONTROL_TRANSACTION_COMMIT:
 452                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 453                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 454
 455         case CTDB_CONTROL_WIPE_DATABASE:
 456                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 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, c, indata,
 476                                                        async_reply);
 477
 478         case CTDB_CONTROL_GET_CAPABILITIES:
 479                 return ctdb_control_get_capabilities(ctdb, outdata);
 480
 481         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 482                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 483
 484         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 485                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 486
 487         case CTDB_CONTROL_TRANS2_COMMIT:
 488         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 489                 return control_not_implemented("TRANS2_COMMIT", "TRANS3_COMMIT");
 490
 491         case CTDB_CONTROL_TRANS2_ERROR:
 492                 return control_not_implemented("TRANS2_ERROR", NULL);
 493
 494         case CTDB_CONTROL_TRANS2_FINISHED:
 495                 return control_not_implemented("TRANS2_FINISHED", NULL);
 496
 497         case CTDB_CONTROL_TRANS2_ACTIVE:
 498                 return control_not_implemented("TRANS2_ACTIVE", NULL);
 499
 500         case CTDB_CONTROL_TRANS3_COMMIT:
 501                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 502
 503         case CTDB_CONTROL_RECD_PING:
 504                 CHECK_CONTROL_DATA_SIZE(0);
 505                 return ctdb_control_recd_ping(ctdb);
 506
 507         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 508                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 509                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 510
 511         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 512                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 513                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 514                 return 0;
 515         case CTDB_CONTROL_GET_RECLOCK_FILE:
 516                 CHECK_CONTROL_DATA_SIZE(0);
 517                 if (ctdb->recovery_lock_file != NULL) {
 518                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 519                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 520                 }
 521                 return 0;
 522         case CTDB_CONTROL_SET_RECLOCK_FILE:
 523                 ctdb->tunable.verify_recovery_lock = 0;
 524                 if (ctdb->recovery_lock_file != NULL) {
 525                         talloc_free(ctdb->recovery_lock_file);
 526                         ctdb->recovery_lock_file = NULL;
 527                 }
 528                 if (indata.dsize > 0) {
 529                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 530                         ctdb->tunable.verify_recovery_lock = 1;
 531                 }
 532                 return 0;
 533
 534         case CTDB_CONTROL_STOP_NODE:
 535                 CHECK_CONTROL_DATA_SIZE(0);
 536                 return ctdb_control_stop_node(ctdb);
 537
 538         case CTDB_CONTROL_CONTINUE_NODE:
 539                 CHECK_CONTROL_DATA_SIZE(0);
 540                 return ctdb_control_continue_node(ctdb);
 541
 542         case CTDB_CONTROL_SET_NATGWSTATE: {
 543                 uint32_t natgwstate;
 544
 545                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 546                 natgwstate = *(uint32_t *)indata.dptr;
 547                 if (natgwstate == 0) {
 548                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 549                 } else {
 550                         ctdb->capabilities |= CTDB_CAP_NATGW;
 551                 }
 552                 return 0;
 553         }
 554
 555         case CTDB_CONTROL_SET_LMASTERROLE: {
 556                 uint32_t lmasterrole;
 557
 558                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 559                 lmasterrole = *(uint32_t *)indata.dptr;
 560                 if (lmasterrole == 0) {
 561                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 562                 } else {
 563                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 564                 }
 565                 return 0;
 566         }
 567
 568         case CTDB_CONTROL_SET_RECMASTERROLE: {
 569                 uint32_t recmasterrole;
 570
 571                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 572                 recmasterrole = *(uint32_t *)indata.dptr;
 573                 if (recmasterrole == 0) {
 574                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 575                 } else {
 576                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 577                 }
 578                 return 0;
 579         }
 580
 581         case CTDB_CONTROL_ENABLE_SCRIPT:
 582                 return ctdb_control_enable_script(ctdb, indata);
 583
 584         case CTDB_CONTROL_DISABLE_SCRIPT:
 585                 return ctdb_control_disable_script(ctdb, indata);
 586
 587         case CTDB_CONTROL_SET_BAN_STATE:
 588                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 589                 return ctdb_control_set_ban_state(ctdb, indata);
 590
 591         case CTDB_CONTROL_GET_BAN_STATE:
 592                 CHECK_CONTROL_DATA_SIZE(0);
 593                 return ctdb_control_get_ban_state(ctdb, outdata);
 594
 595         case CTDB_CONTROL_SET_DB_PRIORITY:
 596                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 597                 return ctdb_control_set_db_priority(ctdb, indata, client_id);
 598
 599         case CTDB_CONTROL_GET_DB_PRIORITY: {
 600                 uint32_t db_id;
 601                 struct ctdb_db_context *ctdb_db;
 602
 603                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 604                 db_id = *(uint32_t *)indata.dptr;
 605                 ctdb_db = find_ctdb_db(ctdb, db_id);
 606                 if (ctdb_db == NULL) return -1;
 607                 return ctdb_db->priority;
 608         }
 609
 610         case CTDB_CONTROL_TRANSACTION_CANCEL:
 611                 CHECK_CONTROL_DATA_SIZE(0);
 612                 return ctdb_control_transaction_cancel(ctdb);
 613
 614         case CTDB_CONTROL_REGISTER_NOTIFY:
 615                 return ctdb_control_register_notify(ctdb, client_id, indata);
 616
 617         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 618                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 619                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 620
 621         case CTDB_CONTROL_GET_LOG:
 622                 return control_not_implemented("GET_LOG", NULL);
 623
 624         case CTDB_CONTROL_CLEAR_LOG:
 625                 return control_not_implemented("CLEAR_LOG", NULL);
 626
 627         case CTDB_CONTROL_GET_DB_SEQNUM:
 628                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 629                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 630
 631         case CTDB_CONTROL_DB_SET_HEALTHY:
 632                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 633                 return ctdb_control_db_set_healthy(ctdb, indata);
 634
 635         case CTDB_CONTROL_DB_GET_HEALTH:
 636                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 637                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 638
 639         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 640                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 641                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 642
 643         case CTDB_CONTROL_GET_IFACES:
 644                 CHECK_CONTROL_DATA_SIZE(0);
 645                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 646
 647         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 648                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 649                 return ctdb_control_set_iface_link(ctdb, c, indata);
 650
 651         case CTDB_CONTROL_GET_STAT_HISTORY:
 652                 CHECK_CONTROL_DATA_SIZE(0);
 653                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 654
 655         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 656                 struct ctdb_control_schedule_for_deletion *d;
 657                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 658                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 659                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 660                 size += d->keylen;
 661                 CHECK_CONTROL_DATA_SIZE(size);
 662                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 663         }
 664         case CTDB_CONTROL_GET_DB_STATISTICS:
 665                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 666                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 667
 668         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 669                 CHECK_CONTROL_DATA_SIZE(0);
 670                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 671
 672         case CTDB_CONTROL_RECEIVE_RECORDS:
 673                 return ctdb_control_receive_records(ctdb, indata, outdata);
 674
 675         case CTDB_CONTROL_DB_DETACH:
 676                 return ctdb_control_db_detach(ctdb, indata, client_id);
 677
 678         default:
 679                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 680                 return -1;
 681         }
 682 }
 683
 684 /*
 685   send a reply for a ctdb control
 686  */
 687 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 688                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 689 {
 690         struct ctdb_reply_control *r;
 691         size_t len;
 692
 693         /* some controls send no reply */
 694         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 695                 return;
 696         }
 697
 698         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 699         if (errormsg) {
 700                 len += strlen(errormsg);
 701         }
 702         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 703         if (r == NULL) {
 704                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 705                 return;
 706         }
 707
 708         r->hdr.destnode     = c->hdr.srcnode;
 709         r->hdr.reqid        = c->hdr.reqid;
 710         r->status           = status;
 711         r->datalen          = outdata?outdata->dsize:0;
 712         if (outdata && outdata->dsize) {
 713                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 714         }
 715         if (errormsg) {
 716                 r->errorlen = strlen(errormsg);
 717                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 718         }
 719
 720         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 721
 722         talloc_free(r);
 723 }
 724
 725 /*
 726   called when a CTDB_REQ_CONTROL packet comes in
 727 */
 728 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 729 {
 730         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 731         TDB_DATA data, *outdata;
 732         int32_t status;
 733         bool async_reply = false;
 734         const char *errormsg = NULL;
 735
 736         data.dptr = &c->data[0];
 737         data.dsize = c->datalen;
 738
 739         outdata = talloc_zero(c, TDB_DATA);
 740
 741         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 742                                        &errormsg, &async_reply);
 743
 744         if (!async_reply) {
 745                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 746         }
 747 }
 748
 749 /*
 750   called when a CTDB_REPLY_CONTROL packet comes in
 751 */
 752 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 753 {
 754         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 755         TDB_DATA data;
 756         struct ctdb_control_state *state;
 757         const char *errormsg = NULL;
 758
 759         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 760         if (state == NULL) {
 761                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 762                          ctdb->pnn, hdr->reqid));
 763                 return;
 764         }
 765
 766         if (hdr->reqid != state->reqid) {
 767                 /* we found a record  but it was the wrong one */
 768                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 769                 return;
 770         }
 771
 772         data.dptr = &c->data[0];
 773         data.dsize = c->datalen;
 774         if (c->errorlen) {
 775                 errormsg = talloc_strndup(state,
 776                                           (char *)&c->data[c->datalen], c->errorlen);
 777         }
 778
 779         /* make state a child of the packet, so it goes away when the packet
 780            is freed. */
 781         talloc_steal(hdr, state);
 782
 783         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 784 }
 785
 786 static int ctdb_control_destructor(struct ctdb_control_state *state)
 787 {
 788         ctdb_reqid_remove(state->ctdb, state->reqid);
 789         return 0;
 790 }
 791
 792 /*
 793   handle a timeout of a control
 794  */
 795 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 796                        struct timeval t, void *private_data)
 797 {
 798         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 799         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 800
 801         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 802
 803         talloc_steal(tmp_ctx, state);
 804
 805         state->callback(state->ctdb, -1, tdb_null,
 806                         "ctdb_control timed out",
 807                         state->private_data);
 808         talloc_free(tmp_ctx);
 809 }
 810
 811
 812 /*
 813   send a control message to a node
 814  */
 815 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 816                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 817                              uint32_t flags,
 818                              TDB_DATA data,
 819                              ctdb_control_callback_fn_t callback,
 820                              void *private_data)
 821 {
 822         struct ctdb_req_control *c;
 823         struct ctdb_control_state *state;
 824         size_t len;
 825
 826         if (ctdb->methods == NULL) {
 827                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 828                 return -1;
 829         }
 830
 831         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 832              (destnode == CTDB_BROADCAST_ALL) ||
 833              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 834             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 835                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 836                 return -1;
 837         }
 838
 839         if (destnode != CTDB_BROADCAST_VNNMAP &&
 840             destnode != CTDB_BROADCAST_ALL &&
 841             destnode != CTDB_BROADCAST_CONNECTED &&
 842             (!ctdb_validate_pnn(ctdb, destnode) ||
 843              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 844                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 845                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 846                 }
 847                 return 0;
 848         }
 849
 850         /* the state is made a child of private_data if possible. This means any reply
 851            will be discarded if the private_data goes away */
 852         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 853         CTDB_NO_MEMORY(ctdb, state);
 854
 855         state->reqid = ctdb_reqid_new(ctdb, state);
 856         state->callback = callback;
 857         state->private_data = private_data;
 858         state->ctdb = ctdb;
 859         state->flags = flags;
 860
 861         talloc_set_destructor(state, ctdb_control_destructor);
 862
 863         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 864         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 865                                     struct ctdb_req_control);
 866         CTDB_NO_MEMORY(ctdb, c);
 867         talloc_set_name_const(c, "ctdb_req_control packet");
 868
 869         c->hdr.destnode     = destnode;
 870         c->hdr.reqid        = state->reqid;
 871         c->opcode           = opcode;
 872         c->client_id        = client_id;
 873         c->flags            = flags;
 874         c->srvid            = srvid;
 875         c->datalen          = data.dsize;
 876         if (data.dsize) {
 877                 memcpy(&c->data[0], data.dptr, data.dsize);
 878         }
 879
 880         ctdb_queue_packet(ctdb, &c->hdr);
 881
 882         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 883                 talloc_free(state);
 884                 return 0;
 885         }
 886
 887         if (ctdb->tunable.control_timeout) {
 888                 event_add_timed(ctdb->ev, state,
 889                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 890                                 ctdb_control_timeout, state);
 891         }
 892
 893         talloc_free(c);
 894         return 0;
 895 }