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 "db_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         rewind(f);
  54         outdata->dptr = talloc_size(outdata, fsize);
  55         if (outdata->dptr == NULL) {
  56                 fclose(f);
  57                 CTDB_NO_MEMORY(ctdb, outdata->dptr);
  58         }
  59         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  60         fclose(f);
  61         if (outdata->dsize != fsize) {
  62                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  63                 return -1;
  64         }
  65         return 0;
  66 }
  67
  68 static int32_t control_not_implemented(const char *unsupported,
  69                                        const char *alternate)
  70 {
  71         if (alternate == NULL) {
  72                 DEBUG(DEBUG_ERR,
  73                       ("Control %s is not implemented any more\n",
  74                        unsupported));
  75         } else {
  76                 DEBUG(DEBUG_ERR,
  77                       ("Control %s is not implemented any more, use %s instead\n",
  78                        unsupported, alternate));
  79         }
  80         return -1;
  81 }
  82
  83 /*
  84   process a control request
  85  */
  86 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  87                                      struct ctdb_req_control *c,
  88                                      TDB_DATA indata,
  89                                      TDB_DATA *outdata, uint32_t srcnode,
  90                                      const char **errormsg,
  91                                      bool *async_reply)
  92 {
  93         uint32_t opcode = c->opcode;
  94         uint64_t srvid = c->srvid;
  95         uint32_t client_id = c->client_id;
  96
  97         switch (opcode) {
  98         case CTDB_CONTROL_PROCESS_EXISTS: {
  99                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
 100                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
 101         }
 102
 103         case CTDB_CONTROL_SET_DEBUG: {
 104                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
 105                 LogLevel = *(int32_t *)indata.dptr;
 106                 return 0;
 107         }
 108
 109         case CTDB_CONTROL_GET_DEBUG: {
 110                 CHECK_CONTROL_DATA_SIZE(0);
 111                 outdata->dptr = (uint8_t *)&LogLevel;
 112                 outdata->dsize = sizeof(LogLevel);
 113                 return 0;
 114         }
 115
 116         case CTDB_CONTROL_STATISTICS: {
 117                 int i;
 118                 CHECK_CONTROL_DATA_SIZE(0);
 119                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 120                 ctdb->statistics.num_clients = ctdb->num_clients;
 121                 ctdb->statistics.frozen = 0;
 122                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 123                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 124                                 ctdb->statistics.frozen = 1;
 125                         }
 126                 }
 127                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 128                 ctdb->statistics.statistics_current_time = timeval_current();
 129
 130                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 131                 outdata->dsize = sizeof(ctdb->statistics);
 132                 return 0;
 133         }
 134
 135         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 136                 CHECK_CONTROL_DATA_SIZE(0);
 137                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 138                 outdata->dsize = sizeof(ctdb->tunable);
 139                 return 0;
 140         }
 141
 142         case CTDB_CONTROL_DUMP_MEMORY: {
 143                 CHECK_CONTROL_DATA_SIZE(0);
 144                 return ctdb_dump_memory(ctdb, outdata);
 145         }
 146
 147         case CTDB_CONTROL_STATISTICS_RESET: {
 148                 CHECK_CONTROL_DATA_SIZE(0);
 149                 ZERO_STRUCT(ctdb->statistics);
 150                 ctdb->statistics.statistics_start_time = timeval_current();
 151                 return 0;
 152         }
 153
 154         case CTDB_CONTROL_GETVNNMAP:
 155                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 156
 157         case CTDB_CONTROL_GET_DBMAP:
 158                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 159
 160         case CTDB_CONTROL_GET_NODEMAPv4:
 161                 return ctdb_control_getnodemapv4(ctdb, opcode, indata, outdata);
 162
 163         case CTDB_CONTROL_GET_NODEMAP:
 164                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 165
 166         case CTDB_CONTROL_RELOAD_NODES_FILE:
 167                 CHECK_CONTROL_DATA_SIZE(0);
 168                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 169
 170         case CTDB_CONTROL_SET_DB_STICKY: {
 171                 uint32_t db_id;
 172                 struct ctdb_db_context *ctdb_db;
 173
 174                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 175                 db_id = *(uint32_t *)indata.dptr;
 176                 ctdb_db = find_ctdb_db(ctdb, db_id);
 177                 if (ctdb_db == NULL) return -1;
 178                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 179         }
 180
 181         case CTDB_CONTROL_SETVNNMAP:
 182                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 183
 184         case CTDB_CONTROL_PULL_DB:
 185                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 186                 return ctdb_control_pull_db(ctdb, indata, outdata);
 187
 188         case CTDB_CONTROL_SET_DMASTER:
 189                 return control_not_implemented("SET_DMASTER", NULL);
 190
 191         case CTDB_CONTROL_PUSH_DB:
 192                 return ctdb_control_push_db(ctdb, indata);
 193
 194         case CTDB_CONTROL_GET_RECMODE: {
 195                 int i;
 196                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 197                         return CTDB_RECOVERY_ACTIVE;
 198                 }
 199                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 200                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 201                                 return CTDB_RECOVERY_ACTIVE;
 202                         }
 203                 }
 204                 return CTDB_RECOVERY_NORMAL;
 205         }
 206
 207         case CTDB_CONTROL_SET_RECMASTER: {
 208                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 209         }
 210
 211         case CTDB_CONTROL_GET_RECMASTER:
 212                 return ctdb->recovery_master;
 213
 214         case CTDB_CONTROL_GET_PID:
 215                 return getpid();
 216
 217         case CTDB_CONTROL_GET_PNN:
 218                 return ctdb->pnn;
 219
 220         case CTDB_CONTROL_PING:
 221                 CHECK_CONTROL_DATA_SIZE(0);
 222                 return ctdb->num_clients;
 223
 224         case CTDB_CONTROL_GET_RUNSTATE:
 225                 CHECK_CONTROL_DATA_SIZE(0);
 226                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 227                 outdata->dsize = sizeof(uint32_t);
 228                 return 0;
 229
 230
 231         case CTDB_CONTROL_SET_DB_READONLY: {
 232                 uint32_t db_id;
 233                 struct ctdb_db_context *ctdb_db;
 234
 235                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 236                 db_id = *(uint32_t *)indata.dptr;
 237                 ctdb_db = find_ctdb_db(ctdb, db_id);
 238                 if (ctdb_db == NULL) return -1;
 239                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 240         }
 241         case CTDB_CONTROL_GET_DBNAME: {
 242                 uint32_t db_id;
 243                 struct ctdb_db_context *ctdb_db;
 244
 245                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 246                 db_id = *(uint32_t *)indata.dptr;
 247                 ctdb_db = find_ctdb_db(ctdb, db_id);
 248                 if (ctdb_db == NULL) return -1;
 249                 outdata->dptr = discard_const(ctdb_db->db_name);
 250                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 251                 return 0;
 252         }
 253
 254         case CTDB_CONTROL_GETDBPATH: {
 255                 uint32_t db_id;
 256                 struct ctdb_db_context *ctdb_db;
 257
 258                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 259                 db_id = *(uint32_t *)indata.dptr;
 260                 ctdb_db = find_ctdb_db(ctdb, db_id);
 261                 if (ctdb_db == NULL) return -1;
 262                 outdata->dptr = discard_const(ctdb_db->db_path);
 263                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 264                 return 0;
 265         }
 266
 267         case CTDB_CONTROL_DB_ATTACH:
 268           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 269
 270         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 271           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 272
 273         case CTDB_CONTROL_SET_CALL: {
 274                 struct ctdb_control_set_call *sc =
 275                         (struct ctdb_control_set_call *)indata.dptr;
 276                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 277                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 278         }
 279
 280         case CTDB_CONTROL_TRAVERSE_START:
 281                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 282                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 283
 284         case CTDB_CONTROL_TRAVERSE_START_EXT:
 285                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 286                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 287
 288         case CTDB_CONTROL_TRAVERSE_ALL:
 289                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 290
 291         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 292                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 293
 294         case CTDB_CONTROL_TRAVERSE_DATA:
 295                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 296
 297         case CTDB_CONTROL_TRAVERSE_KILL:
 298                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 299                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 300
 301         case CTDB_CONTROL_REGISTER_SRVID:
 302                 return daemon_register_message_handler(ctdb, client_id, srvid);
 303
 304         case CTDB_CONTROL_DEREGISTER_SRVID:
 305                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 306
 307         case CTDB_CONTROL_CHECK_SRVIDS:
 308                 return daemon_check_srvids(ctdb, indata, outdata);
 309
 310         case CTDB_CONTROL_ENABLE_SEQNUM:
 311                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 312                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 313
 314         case CTDB_CONTROL_UPDATE_SEQNUM:
 315                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 316                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 317
 318         case CTDB_CONTROL_FREEZE:
 319                 CHECK_CONTROL_DATA_SIZE(0);
 320                 return ctdb_control_freeze(ctdb, c, async_reply);
 321
 322         case CTDB_CONTROL_THAW:
 323                 CHECK_CONTROL_DATA_SIZE(0);
 324                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 325
 326         case CTDB_CONTROL_SET_RECMODE:
 327                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 328                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 329
 330         case CTDB_CONTROL_GET_MONMODE:
 331                 CHECK_CONTROL_DATA_SIZE(0);
 332                 return ctdb_monitoring_mode(ctdb);
 333
 334         case CTDB_CONTROL_ENABLE_MONITOR:
 335                 CHECK_CONTROL_DATA_SIZE(0);
 336                 ctdb_enable_monitoring(ctdb);
 337                 return 0;
 338
 339         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 340                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 341
 342         case CTDB_CONTROL_DISABLE_MONITOR:
 343                 CHECK_CONTROL_DATA_SIZE(0);
 344                 ctdb_disable_monitoring(ctdb);
 345                 return 0;
 346
 347         case CTDB_CONTROL_SHUTDOWN:
 348                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command.\n"));
 349                 ctdb_shutdown_sequence(ctdb, 0);
 350                 /* In case above returns due to duplicate shutdown */
 351                 return 0;
 352
 353         case CTDB_CONTROL_TAKEOVER_IPv4:
 354                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 355                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 356
 357         case CTDB_CONTROL_TAKEOVER_IP:
 358                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 359                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 360
 361         case CTDB_CONTROL_RELEASE_IPv4:
 362                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 363                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 364
 365         case CTDB_CONTROL_RELEASE_IP:
 366                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 367                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 368
 369         case CTDB_CONTROL_IPREALLOCATED:
 370                 CHECK_CONTROL_DATA_SIZE(0);
 371                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 372
 373         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 374                 CHECK_CONTROL_DATA_SIZE(0);
 375                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 376
 377         case CTDB_CONTROL_GET_PUBLIC_IPS:
 378                 CHECK_CONTROL_DATA_SIZE(0);
 379                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 380
 381         case CTDB_CONTROL_TCP_CLIENT:
 382                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 383
 384         case CTDB_CONTROL_STARTUP:
 385                 CHECK_CONTROL_DATA_SIZE(0);
 386                 return ctdb_control_startup(ctdb, srcnode);
 387
 388         case CTDB_CONTROL_TCP_ADD:
 389                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 390                 return ctdb_control_tcp_add(ctdb, indata, false);
 391
 392         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 393                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 394                 return ctdb_control_tcp_add(ctdb, indata, true);
 395
 396         case CTDB_CONTROL_TCP_REMOVE:
 397                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 398                 return ctdb_control_tcp_remove(ctdb, indata);
 399
 400         case CTDB_CONTROL_SET_TUNABLE:
 401                 return ctdb_control_set_tunable(ctdb, indata);
 402
 403         case CTDB_CONTROL_GET_TUNABLE:
 404                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 405
 406         case CTDB_CONTROL_LIST_TUNABLES:
 407                 return ctdb_control_list_tunables(ctdb, outdata);
 408
 409         case CTDB_CONTROL_MODIFY_FLAGS:
 410                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 411                 return ctdb_control_modflags(ctdb, indata);
 412
 413         case CTDB_CONTROL_KILL_TCP:
 414                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 415                 return ctdb_control_kill_tcp(ctdb, indata);
 416
 417         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 418                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 419                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 420
 421         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 422                 /* data size is verified in the called function */
 423                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 424
 425         case CTDB_CONTROL_REGISTER_SERVER_ID:
 426                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 427                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 428
 429         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 430                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 431                 return ctdb_control_unregister_server_id(ctdb, indata);
 432
 433         case CTDB_CONTROL_CHECK_SERVER_ID:
 434                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 435                 return ctdb_control_check_server_id(ctdb, indata);
 436
 437         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 438                 CHECK_CONTROL_DATA_SIZE(0);
 439                 return ctdb_control_get_server_id_list(ctdb, outdata);
 440
 441         case CTDB_CONTROL_PERSISTENT_STORE:
 442                 return control_not_implemented("PERSISTENT_STORE", NULL);
 443
 444         case CTDB_CONTROL_UPDATE_RECORD:
 445                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 446
 447         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 448                 return ctdb_control_send_gratious_arp(ctdb, indata);
 449
 450         case CTDB_CONTROL_TRANSACTION_START:
 451                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 452                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 453
 454         case CTDB_CONTROL_TRANSACTION_COMMIT:
 455                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 456                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 457
 458         case CTDB_CONTROL_WIPE_DATABASE:
 459                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 460                 return ctdb_control_wipe_database(ctdb, indata);
 461
 462         case CTDB_CONTROL_UPTIME:
 463                 return ctdb_control_uptime(ctdb, outdata);
 464
 465         case CTDB_CONTROL_START_RECOVERY:
 466                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 467
 468         case CTDB_CONTROL_END_RECOVERY:
 469                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 470
 471         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 472                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 473
 474         case CTDB_CONTROL_ADD_PUBLIC_IP:
 475                 return ctdb_control_add_public_address(ctdb, indata);
 476
 477         case CTDB_CONTROL_DEL_PUBLIC_IP:
 478                 return ctdb_control_del_public_address(ctdb, indata);
 479
 480         case CTDB_CONTROL_GET_CAPABILITIES:
 481                 return ctdb_control_get_capabilities(ctdb, outdata);
 482
 483         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 484                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 485
 486         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 487                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 488
 489         case CTDB_CONTROL_TRANS2_COMMIT:
 490         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 491                 return control_not_implemented("TRANS2_COMMIT", "TRANS3_COMMIT");
 492
 493         case CTDB_CONTROL_TRANS2_ERROR:
 494                 return control_not_implemented("TRANS2_ERROR", NULL);
 495
 496         case CTDB_CONTROL_TRANS2_FINISHED:
 497                 return control_not_implemented("TRANS2_FINISHED", NULL);
 498
 499         case CTDB_CONTROL_TRANS2_ACTIVE:
 500                 return control_not_implemented("TRANS2_ACTIVE", NULL);
 501
 502         case CTDB_CONTROL_TRANS3_COMMIT:
 503                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 504
 505         case CTDB_CONTROL_RECD_PING:
 506                 CHECK_CONTROL_DATA_SIZE(0);
 507                 return ctdb_control_recd_ping(ctdb);
 508
 509         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 510                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 511                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 512
 513         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 514                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 515                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 516                 return 0;
 517         case CTDB_CONTROL_GET_RECLOCK_FILE:
 518                 CHECK_CONTROL_DATA_SIZE(0);
 519                 if (ctdb->recovery_lock_file != NULL) {
 520                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 521                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 522                 }
 523                 return 0;
 524         case CTDB_CONTROL_SET_RECLOCK_FILE:
 525                 ctdb->tunable.verify_recovery_lock = 0;
 526                 if (ctdb->recovery_lock_file != NULL) {
 527                         talloc_free(ctdb->recovery_lock_file);
 528                         ctdb->recovery_lock_file = NULL;
 529                 }
 530                 if (indata.dsize > 0) {
 531                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 532                         ctdb->tunable.verify_recovery_lock = 1;
 533                 }
 534                 return 0;
 535
 536         case CTDB_CONTROL_STOP_NODE:
 537                 CHECK_CONTROL_DATA_SIZE(0);
 538                 return ctdb_control_stop_node(ctdb);
 539
 540         case CTDB_CONTROL_CONTINUE_NODE:
 541                 CHECK_CONTROL_DATA_SIZE(0);
 542                 return ctdb_control_continue_node(ctdb);
 543
 544         case CTDB_CONTROL_SET_NATGWSTATE: {
 545                 uint32_t natgwstate;
 546
 547                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 548                 natgwstate = *(uint32_t *)indata.dptr;
 549                 if (natgwstate == 0) {
 550                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 551                 } else {
 552                         ctdb->capabilities |= CTDB_CAP_NATGW;
 553                 }
 554                 return 0;
 555         }
 556
 557         case CTDB_CONTROL_SET_LMASTERROLE: {
 558                 uint32_t lmasterrole;
 559
 560                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 561                 lmasterrole = *(uint32_t *)indata.dptr;
 562                 if (lmasterrole == 0) {
 563                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 564                 } else {
 565                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 566                 }
 567                 return 0;
 568         }
 569
 570         case CTDB_CONTROL_SET_RECMASTERROLE: {
 571                 uint32_t recmasterrole;
 572
 573                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 574                 recmasterrole = *(uint32_t *)indata.dptr;
 575                 if (recmasterrole == 0) {
 576                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 577                 } else {
 578                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 579                 }
 580                 return 0;
 581         }
 582
 583         case CTDB_CONTROL_ENABLE_SCRIPT:
 584                 return ctdb_control_enable_script(ctdb, indata);
 585
 586         case CTDB_CONTROL_DISABLE_SCRIPT:
 587                 return ctdb_control_disable_script(ctdb, indata);
 588
 589         case CTDB_CONTROL_SET_BAN_STATE:
 590                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 591                 return ctdb_control_set_ban_state(ctdb, indata);
 592
 593         case CTDB_CONTROL_GET_BAN_STATE:
 594                 CHECK_CONTROL_DATA_SIZE(0);
 595                 return ctdb_control_get_ban_state(ctdb, outdata);
 596
 597         case CTDB_CONTROL_SET_DB_PRIORITY:
 598                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 599                 return ctdb_control_set_db_priority(ctdb, indata);
 600
 601         case CTDB_CONTROL_GET_DB_PRIORITY: {
 602                 uint32_t db_id;
 603                 struct ctdb_db_context *ctdb_db;
 604
 605                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 606                 db_id = *(uint32_t *)indata.dptr;
 607                 ctdb_db = find_ctdb_db(ctdb, db_id);
 608                 if (ctdb_db == NULL) return -1;
 609                 return ctdb_db->priority;
 610         }
 611
 612         case CTDB_CONTROL_TRANSACTION_CANCEL:
 613                 CHECK_CONTROL_DATA_SIZE(0);
 614                 return ctdb_control_transaction_cancel(ctdb);
 615
 616         case CTDB_CONTROL_REGISTER_NOTIFY:
 617                 return ctdb_control_register_notify(ctdb, client_id, indata);
 618
 619         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 620                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 621                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 622
 623         case CTDB_CONTROL_GET_LOG:
 624                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 625                 return ctdb_control_get_log(ctdb, indata);
 626
 627         case CTDB_CONTROL_CLEAR_LOG:
 628                 return ctdb_control_clear_log(ctdb);
 629
 630         case CTDB_CONTROL_GET_DB_SEQNUM:
 631                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 632                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 633
 634         case CTDB_CONTROL_DB_SET_HEALTHY:
 635                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 636                 return ctdb_control_db_set_healthy(ctdb, indata);
 637
 638         case CTDB_CONTROL_DB_GET_HEALTH:
 639                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 640                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 641
 642         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 643                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 644                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 645
 646         case CTDB_CONTROL_GET_IFACES:
 647                 CHECK_CONTROL_DATA_SIZE(0);
 648                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 649
 650         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 651                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 652                 return ctdb_control_set_iface_link(ctdb, c, indata);
 653
 654         case CTDB_CONTROL_GET_STAT_HISTORY:
 655                 CHECK_CONTROL_DATA_SIZE(0);
 656                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 657
 658         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 659                 struct ctdb_control_schedule_for_deletion *d;
 660                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 661                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 662                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 663                 size += d->keylen;
 664                 CHECK_CONTROL_DATA_SIZE(size);
 665                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 666         }
 667         case CTDB_CONTROL_GET_DB_STATISTICS:
 668                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 669                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 670
 671         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 672                 CHECK_CONTROL_DATA_SIZE(0);
 673                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 674
 675         case CTDB_CONTROL_RECEIVE_RECORDS:
 676                 return ctdb_control_receive_records(ctdb, indata, outdata);
 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 }