server/ctdb_control.c

   1 /*
   2    ctdb_control protocol code
   3
   4    Copyright (C) Andrew Tridgell  2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "includes.h"
  20 #include "lib/tdb/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         CTDB_NO_MEMORY(ctdb, outdata->dptr);
  56         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  57         fclose(f);
  58         if (outdata->dsize != fsize) {
  59                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  60                 return -1;
  61         }
  62         return 0;
  63 }
  64
  65
  66 /*
  67   process a control request
  68  */
  69 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  70                                      struct ctdb_req_control *c,
  71                                      TDB_DATA indata,
  72                                      TDB_DATA *outdata, uint32_t srcnode,
  73                                      const char **errormsg,
  74                                      bool *async_reply)
  75 {
  76         uint32_t opcode = c->opcode;
  77         uint64_t srvid = c->srvid;
  78         uint32_t client_id = c->client_id;
  79
  80         switch (opcode) {
  81         case CTDB_CONTROL_PROCESS_EXISTS: {
  82                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  83                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  84         }
  85
  86         case CTDB_CONTROL_SET_DEBUG: {
  87                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
  88                 LogLevel = *(int32_t *)indata.dptr;
  89                 return 0;
  90         }
  91
  92         case CTDB_CONTROL_GET_DEBUG: {
  93                 CHECK_CONTROL_DATA_SIZE(0);
  94                 outdata->dptr = (uint8_t *)&LogLevel;
  95                 outdata->dsize = sizeof(LogLevel);
  96                 return 0;
  97         }
  98
  99         case CTDB_CONTROL_STATISTICS: {
 100                 int i;
 101                 CHECK_CONTROL_DATA_SIZE(0);
 102                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 103                 ctdb->statistics.num_clients = ctdb->num_clients;
 104                 ctdb->statistics.frozen = 0;
 105                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 106                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 107                                 ctdb->statistics.frozen = 1;
 108                         }
 109                 }
 110                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 111                 ctdb->statistics.statistics_current_time = timeval_current();
 112
 113                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 114                 outdata->dsize = sizeof(ctdb->statistics);
 115                 return 0;
 116         }
 117
 118         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 119                 CHECK_CONTROL_DATA_SIZE(0);
 120                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 121                 outdata->dsize = sizeof(ctdb->tunable);
 122                 return 0;
 123         }
 124
 125         case CTDB_CONTROL_DUMP_MEMORY: {
 126                 CHECK_CONTROL_DATA_SIZE(0);
 127                 return ctdb_dump_memory(ctdb, outdata);
 128         }
 129
 130         case CTDB_CONTROL_STATISTICS_RESET: {
 131                 CHECK_CONTROL_DATA_SIZE(0);
 132                 ZERO_STRUCT(ctdb->statistics);
 133                 ctdb->statistics.statistics_start_time = timeval_current();
 134                 return 0;
 135         }
 136
 137         case CTDB_CONTROL_GETVNNMAP:
 138                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 139
 140         case CTDB_CONTROL_GET_DBMAP:
 141                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 142
 143         case CTDB_CONTROL_GET_NODEMAPv4:
 144                 return ctdb_control_getnodemapv4(ctdb, opcode, indata, outdata);
 145
 146         case CTDB_CONTROL_GET_NODEMAP:
 147                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 148
 149         case CTDB_CONTROL_RELOAD_NODES_FILE:
 150                 CHECK_CONTROL_DATA_SIZE(0);
 151                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 152
 153         case CTDB_CONTROL_SET_DB_STICKY: {
 154                 uint32_t db_id;
 155                 struct ctdb_db_context *ctdb_db;
 156
 157                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 158                 db_id = *(uint32_t *)indata.dptr;
 159                 ctdb_db = find_ctdb_db(ctdb, db_id);
 160                 if (ctdb_db == NULL) return -1;
 161                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 162         }
 163
 164         case CTDB_CONTROL_SETVNNMAP:
 165                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 166
 167         case CTDB_CONTROL_PULL_DB:
 168                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 169                 return ctdb_control_pull_db(ctdb, indata, outdata);
 170
 171         case CTDB_CONTROL_SET_DMASTER:
 172                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
 173                 DEBUG(DEBUG_ERR, ("The SET_DMASTER control is not implemented "
 174                                   "any more.\n"));
 175                 return  -1;
 176
 177         case CTDB_CONTROL_PUSH_DB:
 178                 return ctdb_control_push_db(ctdb, indata);
 179
 180         case CTDB_CONTROL_GET_RECMODE: {
 181                 int i;
 182                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 183                         return CTDB_RECOVERY_ACTIVE;
 184                 }
 185                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 186                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 187                                 return CTDB_RECOVERY_ACTIVE;
 188                         }
 189                 }
 190                 return CTDB_RECOVERY_NORMAL;
 191         }
 192
 193         case CTDB_CONTROL_SET_RECMASTER: {
 194                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 195         }
 196
 197         case CTDB_CONTROL_GET_RECMASTER:
 198                 return ctdb->recovery_master;
 199
 200         case CTDB_CONTROL_GET_PID:
 201                 return getpid();
 202
 203         case CTDB_CONTROL_GET_PNN:
 204                 return ctdb->pnn;
 205
 206         case CTDB_CONTROL_PING:
 207                 CHECK_CONTROL_DATA_SIZE(0);
 208                 return ctdb->num_clients;
 209
 210         case CTDB_CONTROL_GET_RUNSTATE:
 211                 CHECK_CONTROL_DATA_SIZE(0);
 212                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 213                 outdata->dsize = sizeof(uint32_t);
 214                 return 0;
 215
 216
 217         case CTDB_CONTROL_SET_DB_READONLY: {
 218                 uint32_t db_id;
 219                 struct ctdb_db_context *ctdb_db;
 220
 221                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 222                 db_id = *(uint32_t *)indata.dptr;
 223                 ctdb_db = find_ctdb_db(ctdb, db_id);
 224                 if (ctdb_db == NULL) return -1;
 225                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 226         }
 227         case CTDB_CONTROL_GET_DBNAME: {
 228                 uint32_t db_id;
 229                 struct ctdb_db_context *ctdb_db;
 230
 231                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 232                 db_id = *(uint32_t *)indata.dptr;
 233                 ctdb_db = find_ctdb_db(ctdb, db_id);
 234                 if (ctdb_db == NULL) return -1;
 235                 outdata->dptr = discard_const(ctdb_db->db_name);
 236                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 237                 return 0;
 238         }
 239
 240         case CTDB_CONTROL_GETDBPATH: {
 241                 uint32_t db_id;
 242                 struct ctdb_db_context *ctdb_db;
 243
 244                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 245                 db_id = *(uint32_t *)indata.dptr;
 246                 ctdb_db = find_ctdb_db(ctdb, db_id);
 247                 if (ctdb_db == NULL) return -1;
 248                 outdata->dptr = discard_const(ctdb_db->db_path);
 249                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 250                 return 0;
 251         }
 252
 253         case CTDB_CONTROL_DB_ATTACH:
 254           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 255
 256         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 257           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 258
 259         case CTDB_CONTROL_SET_CALL: {
 260                 struct ctdb_control_set_call *sc =
 261                         (struct ctdb_control_set_call *)indata.dptr;
 262                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 263                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 264         }
 265
 266         case CTDB_CONTROL_TRAVERSE_START:
 267                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 268                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 269
 270         case CTDB_CONTROL_TRAVERSE_START_EXT:
 271                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 272                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 273
 274         case CTDB_CONTROL_TRAVERSE_ALL:
 275                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 276
 277         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 278                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 279
 280         case CTDB_CONTROL_TRAVERSE_DATA:
 281                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 282
 283         case CTDB_CONTROL_TRAVERSE_KILL:
 284                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 285                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 286
 287         case CTDB_CONTROL_REGISTER_SRVID:
 288                 return daemon_register_message_handler(ctdb, client_id, srvid);
 289
 290         case CTDB_CONTROL_DEREGISTER_SRVID:
 291                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 292
 293         case CTDB_CONTROL_CHECK_SRVIDS:
 294                 return daemon_check_srvids(ctdb, indata, outdata);
 295
 296         case CTDB_CONTROL_ENABLE_SEQNUM:
 297                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 298                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 299
 300         case CTDB_CONTROL_UPDATE_SEQNUM:
 301                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 302                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 303
 304         case CTDB_CONTROL_FREEZE:
 305                 CHECK_CONTROL_DATA_SIZE(0);
 306                 return ctdb_control_freeze(ctdb, c, async_reply);
 307
 308         case CTDB_CONTROL_THAW:
 309                 CHECK_CONTROL_DATA_SIZE(0);
 310                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 311
 312         case CTDB_CONTROL_SET_RECMODE:
 313                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 314                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 315
 316         case CTDB_CONTROL_GET_MONMODE:
 317                 CHECK_CONTROL_DATA_SIZE(0);
 318                 return ctdb_monitoring_mode(ctdb);
 319
 320         case CTDB_CONTROL_ENABLE_MONITOR:
 321                 CHECK_CONTROL_DATA_SIZE(0);
 322                 ctdb_enable_monitoring(ctdb);
 323                 return 0;
 324
 325         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 326                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 327
 328         case CTDB_CONTROL_DISABLE_MONITOR:
 329                 CHECK_CONTROL_DATA_SIZE(0);
 330                 ctdb_disable_monitoring(ctdb);
 331                 return 0;
 332
 333         case CTDB_CONTROL_SHUTDOWN:
 334                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 335                 ctdb_set_runstate(ctdb, CTDB_RUNSTATE_SHUTDOWN);
 336                 ctdb_stop_recoverd(ctdb);
 337                 ctdb_stop_keepalive(ctdb);
 338                 ctdb_stop_monitoring(ctdb);
 339                 ctdb_release_all_ips(ctdb);
 340                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 341                 if (ctdb->methods != NULL) {
 342                         ctdb->methods->shutdown(ctdb);
 343                 }
 344                 exit(0);
 345
 346         case CTDB_CONTROL_TAKEOVER_IPv4:
 347                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 348                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 349
 350         case CTDB_CONTROL_TAKEOVER_IP:
 351                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 352                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 353
 354         case CTDB_CONTROL_RELEASE_IPv4:
 355                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 356                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 357
 358         case CTDB_CONTROL_RELEASE_IP:
 359                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 360                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 361
 362         case CTDB_CONTROL_IPREALLOCATED:
 363                 CHECK_CONTROL_DATA_SIZE(0);
 364                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 365
 366         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 367                 CHECK_CONTROL_DATA_SIZE(0);
 368                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 369
 370         case CTDB_CONTROL_GET_PUBLIC_IPS:
 371                 CHECK_CONTROL_DATA_SIZE(0);
 372                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 373
 374         case CTDB_CONTROL_TCP_CLIENT:
 375                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 376
 377         case CTDB_CONTROL_STARTUP:
 378                 CHECK_CONTROL_DATA_SIZE(0);
 379                 return ctdb_control_startup(ctdb, srcnode);
 380
 381         case CTDB_CONTROL_TCP_ADD:
 382                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 383                 return ctdb_control_tcp_add(ctdb, indata, false);
 384
 385         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 386                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 387                 return ctdb_control_tcp_add(ctdb, indata, true);
 388
 389         case CTDB_CONTROL_TCP_REMOVE:
 390                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 391                 return ctdb_control_tcp_remove(ctdb, indata);
 392
 393         case CTDB_CONTROL_SET_TUNABLE:
 394                 return ctdb_control_set_tunable(ctdb, indata);
 395
 396         case CTDB_CONTROL_GET_TUNABLE:
 397                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 398
 399         case CTDB_CONTROL_LIST_TUNABLES:
 400                 return ctdb_control_list_tunables(ctdb, outdata);
 401
 402         case CTDB_CONTROL_MODIFY_FLAGS:
 403                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 404                 return ctdb_control_modflags(ctdb, indata);
 405
 406         case CTDB_CONTROL_KILL_TCP:
 407                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 408                 return ctdb_control_kill_tcp(ctdb, indata);
 409
 410         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 411                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 412                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 413
 414         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 415                 /* data size is verified in the called function */
 416                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 417
 418         case CTDB_CONTROL_REGISTER_SERVER_ID:
 419                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 420                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 421
 422         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 423                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 424                 return ctdb_control_unregister_server_id(ctdb, indata);
 425
 426         case CTDB_CONTROL_CHECK_SERVER_ID:
 427                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 428                 return ctdb_control_check_server_id(ctdb, indata);
 429
 430         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 431                 CHECK_CONTROL_DATA_SIZE(0);
 432                 return ctdb_control_get_server_id_list(ctdb, outdata);
 433
 434         case CTDB_CONTROL_PERSISTENT_STORE:
 435                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 436
 437         case CTDB_CONTROL_UPDATE_RECORD:
 438                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 439
 440         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 441                 return ctdb_control_send_gratious_arp(ctdb, indata);
 442
 443         case CTDB_CONTROL_TRANSACTION_START:
 444                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 445                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 446
 447         case CTDB_CONTROL_TRANSACTION_COMMIT:
 448                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 449                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 450
 451         case CTDB_CONTROL_WIPE_DATABASE:
 452                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 453                 return ctdb_control_wipe_database(ctdb, indata);
 454
 455         case CTDB_CONTROL_UPTIME:
 456                 return ctdb_control_uptime(ctdb, outdata);
 457
 458         case CTDB_CONTROL_START_RECOVERY:
 459                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 460
 461         case CTDB_CONTROL_END_RECOVERY:
 462                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 463
 464         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 465                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 466
 467         case CTDB_CONTROL_ADD_PUBLIC_IP:
 468                 return ctdb_control_add_public_address(ctdb, indata);
 469
 470         case CTDB_CONTROL_DEL_PUBLIC_IP:
 471                 return ctdb_control_del_public_address(ctdb, indata);
 472
 473         case CTDB_CONTROL_GET_CAPABILITIES:
 474                 return ctdb_control_get_capabilities(ctdb, outdata);
 475
 476         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 477                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 478
 479         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 480                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 481
 482         case CTDB_CONTROL_TRANS2_COMMIT:
 483         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 484                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 485
 486         case CTDB_CONTROL_TRANS2_ERROR:
 487                 return ctdb_control_trans2_error(ctdb, c);
 488
 489         case CTDB_CONTROL_TRANS2_FINISHED:
 490                 return ctdb_control_trans2_finished(ctdb, c);
 491
 492         case CTDB_CONTROL_TRANS2_ACTIVE:
 493                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 494                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 495
 496         case CTDB_CONTROL_TRANS3_COMMIT:
 497                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 498
 499         case CTDB_CONTROL_RECD_PING:
 500                 CHECK_CONTROL_DATA_SIZE(0);
 501                 return ctdb_control_recd_ping(ctdb);
 502
 503         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 504                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 505                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 506
 507         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 508                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 509                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 510                 return 0;
 511         case CTDB_CONTROL_GET_RECLOCK_FILE:
 512                 CHECK_CONTROL_DATA_SIZE(0);
 513                 if (ctdb->recovery_lock_file != NULL) {
 514                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 515                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 516                 }
 517                 return 0;
 518         case CTDB_CONTROL_SET_RECLOCK_FILE:
 519                 ctdb->tunable.verify_recovery_lock = 0;
 520                 if (ctdb->recovery_lock_file != NULL) {
 521                         talloc_free(ctdb->recovery_lock_file);
 522                         ctdb->recovery_lock_file = NULL;
 523                 }
 524                 if (indata.dsize > 0) {
 525                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 526                         ctdb->tunable.verify_recovery_lock = 1;
 527                 }
 528                 return 0;
 529
 530         case CTDB_CONTROL_STOP_NODE:
 531                 CHECK_CONTROL_DATA_SIZE(0);
 532                 return ctdb_control_stop_node(ctdb);
 533
 534         case CTDB_CONTROL_CONTINUE_NODE:
 535                 CHECK_CONTROL_DATA_SIZE(0);
 536                 return ctdb_control_continue_node(ctdb);
 537
 538         case CTDB_CONTROL_SET_NATGWSTATE: {
 539                 uint32_t natgwstate;
 540
 541                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 542                 natgwstate = *(uint32_t *)indata.dptr;
 543                 if (natgwstate == 0) {
 544                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 545                 } else {
 546                         ctdb->capabilities |= CTDB_CAP_NATGW;
 547                 }
 548                 return 0;
 549         }
 550
 551         case CTDB_CONTROL_SET_LMASTERROLE: {
 552                 uint32_t lmasterrole;
 553
 554                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 555                 lmasterrole = *(uint32_t *)indata.dptr;
 556                 if (lmasterrole == 0) {
 557                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 558                 } else {
 559                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 560                 }
 561                 return 0;
 562         }
 563
 564         case CTDB_CONTROL_SET_RECMASTERROLE: {
 565                 uint32_t recmasterrole;
 566
 567                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 568                 recmasterrole = *(uint32_t *)indata.dptr;
 569                 if (recmasterrole == 0) {
 570                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 571                 } else {
 572                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 573                 }
 574                 return 0;
 575         }
 576
 577         case CTDB_CONTROL_ENABLE_SCRIPT:
 578                 return ctdb_control_enable_script(ctdb, indata);
 579
 580         case CTDB_CONTROL_DISABLE_SCRIPT:
 581                 return ctdb_control_disable_script(ctdb, indata);
 582
 583         case CTDB_CONTROL_SET_BAN_STATE:
 584                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 585                 return ctdb_control_set_ban_state(ctdb, indata);
 586
 587         case CTDB_CONTROL_GET_BAN_STATE:
 588                 CHECK_CONTROL_DATA_SIZE(0);
 589                 return ctdb_control_get_ban_state(ctdb, outdata);
 590
 591         case CTDB_CONTROL_SET_DB_PRIORITY:
 592                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 593                 return ctdb_control_set_db_priority(ctdb, indata);
 594
 595         case CTDB_CONTROL_GET_DB_PRIORITY: {
 596                 uint32_t db_id;
 597                 struct ctdb_db_context *ctdb_db;
 598
 599                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 600                 db_id = *(uint32_t *)indata.dptr;
 601                 ctdb_db = find_ctdb_db(ctdb, db_id);
 602                 if (ctdb_db == NULL) return -1;
 603                 return ctdb_db->priority;
 604         }
 605
 606         case CTDB_CONTROL_TRANSACTION_CANCEL:
 607                 CHECK_CONTROL_DATA_SIZE(0);
 608                 return ctdb_control_transaction_cancel(ctdb);
 609
 610         case CTDB_CONTROL_REGISTER_NOTIFY:
 611                 return ctdb_control_register_notify(ctdb, client_id, indata);
 612
 613         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 614                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 615                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 616
 617         case CTDB_CONTROL_GET_LOG:
 618                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 619                 return ctdb_control_get_log(ctdb, indata);
 620
 621         case CTDB_CONTROL_CLEAR_LOG:
 622                 return ctdb_control_clear_log(ctdb);
 623
 624         case CTDB_CONTROL_GET_DB_SEQNUM:
 625                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 626                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 627
 628         case CTDB_CONTROL_DB_SET_HEALTHY:
 629                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 630                 return ctdb_control_db_set_healthy(ctdb, indata);
 631
 632         case CTDB_CONTROL_DB_GET_HEALTH:
 633                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 634                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 635
 636         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 637                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 638                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 639
 640         case CTDB_CONTROL_GET_IFACES:
 641                 CHECK_CONTROL_DATA_SIZE(0);
 642                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 643
 644         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 645                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 646                 return ctdb_control_set_iface_link(ctdb, c, indata);
 647
 648         case CTDB_CONTROL_GET_STAT_HISTORY:
 649                 CHECK_CONTROL_DATA_SIZE(0);
 650                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 651
 652         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 653                 struct ctdb_control_schedule_for_deletion *d;
 654                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 655                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 656                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 657                 size += d->keylen;
 658                 CHECK_CONTROL_DATA_SIZE(size);
 659                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 660         }
 661         case CTDB_CONTROL_GET_DB_STATISTICS:
 662                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 663                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 664
 665         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 666                 CHECK_CONTROL_DATA_SIZE(0);
 667                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 668
 669         case CTDB_CONTROL_RECEIVE_RECORDS:
 670                 return ctdb_control_receive_records(ctdb, indata, outdata);
 671
 672         default:
 673                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 674                 return -1;
 675         }
 676 }
 677
 678 /*
 679   send a reply for a ctdb control
 680  */
 681 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 682                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 683 {
 684         struct ctdb_reply_control *r;
 685         size_t len;
 686
 687         /* some controls send no reply */
 688         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 689                 return;
 690         }
 691
 692         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 693         if (errormsg) {
 694                 len += strlen(errormsg);
 695         }
 696         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 697         if (r == NULL) {
 698                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 699                 return;
 700         }
 701
 702         r->hdr.destnode     = c->hdr.srcnode;
 703         r->hdr.reqid        = c->hdr.reqid;
 704         r->status           = status;
 705         r->datalen          = outdata?outdata->dsize:0;
 706         if (outdata && outdata->dsize) {
 707                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 708         }
 709         if (errormsg) {
 710                 r->errorlen = strlen(errormsg);
 711                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 712         }
 713
 714         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 715
 716         talloc_free(r);
 717 }
 718
 719 /*
 720   called when a CTDB_REQ_CONTROL packet comes in
 721 */
 722 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 723 {
 724         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 725         TDB_DATA data, *outdata;
 726         int32_t status;
 727         bool async_reply = false;
 728         const char *errormsg = NULL;
 729
 730         data.dptr = &c->data[0];
 731         data.dsize = c->datalen;
 732
 733         outdata = talloc_zero(c, TDB_DATA);
 734
 735         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 736                                        &errormsg, &async_reply);
 737
 738         if (!async_reply) {
 739                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 740         }
 741 }
 742
 743 /*
 744   called when a CTDB_REPLY_CONTROL packet comes in
 745 */
 746 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 747 {
 748         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 749         TDB_DATA data;
 750         struct ctdb_control_state *state;
 751         const char *errormsg = NULL;
 752
 753         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 754         if (state == NULL) {
 755                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 756                          ctdb->pnn, hdr->reqid));
 757                 return;
 758         }
 759
 760         if (hdr->reqid != state->reqid) {
 761                 /* we found a record  but it was the wrong one */
 762                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 763                 return;
 764         }
 765
 766         data.dptr = &c->data[0];
 767         data.dsize = c->datalen;
 768         if (c->errorlen) {
 769                 errormsg = talloc_strndup(state,
 770                                           (char *)&c->data[c->datalen], c->errorlen);
 771         }
 772
 773         /* make state a child of the packet, so it goes away when the packet
 774            is freed. */
 775         talloc_steal(hdr, state);
 776
 777         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 778 }
 779
 780 static int ctdb_control_destructor(struct ctdb_control_state *state)
 781 {
 782         ctdb_reqid_remove(state->ctdb, state->reqid);
 783         return 0;
 784 }
 785
 786 /*
 787   handle a timeout of a control
 788  */
 789 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 790                        struct timeval t, void *private_data)
 791 {
 792         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 793         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 794
 795         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 796
 797         talloc_steal(tmp_ctx, state);
 798
 799         state->callback(state->ctdb, -1, tdb_null,
 800                         "ctdb_control timed out",
 801                         state->private_data);
 802         talloc_free(tmp_ctx);
 803 }
 804
 805
 806 /*
 807   send a control message to a node
 808  */
 809 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 810                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 811                              uint32_t flags,
 812                              TDB_DATA data,
 813                              ctdb_control_callback_fn_t callback,
 814                              void *private_data)
 815 {
 816         struct ctdb_req_control *c;
 817         struct ctdb_control_state *state;
 818         size_t len;
 819
 820         if (ctdb->methods == NULL) {
 821                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 822                 return -1;
 823         }
 824
 825         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 826              (destnode == CTDB_BROADCAST_ALL) ||
 827              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 828             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 829                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 830                 return -1;
 831         }
 832
 833         if (destnode != CTDB_BROADCAST_VNNMAP &&
 834             destnode != CTDB_BROADCAST_ALL &&
 835             destnode != CTDB_BROADCAST_CONNECTED &&
 836             (!ctdb_validate_pnn(ctdb, destnode) ||
 837              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 838                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 839                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 840                 }
 841                 return 0;
 842         }
 843
 844         /* the state is made a child of private_data if possible. This means any reply
 845            will be discarded if the private_data goes away */
 846         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 847         CTDB_NO_MEMORY(ctdb, state);
 848
 849         state->reqid = ctdb_reqid_new(ctdb, state);
 850         state->callback = callback;
 851         state->private_data = private_data;
 852         state->ctdb = ctdb;
 853         state->flags = flags;
 854
 855         talloc_set_destructor(state, ctdb_control_destructor);
 856
 857         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 858         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 859                                     struct ctdb_req_control);
 860         CTDB_NO_MEMORY(ctdb, c);
 861         talloc_set_name_const(c, "ctdb_req_control packet");
 862
 863         c->hdr.destnode     = destnode;
 864         c->hdr.reqid        = state->reqid;
 865         c->opcode           = opcode;
 866         c->client_id        = client_id;
 867         c->flags            = flags;
 868         c->srvid            = srvid;
 869         c->datalen          = data.dsize;
 870         if (data.dsize) {
 871                 memcpy(&c->data[0], data.dptr, data.dsize);
 872         }
 873
 874         ctdb_queue_packet(ctdb, &c->hdr);
 875
 876         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 877                 talloc_free(state);
 878                 return 0;
 879         }
 880
 881         if (ctdb->tunable.control_timeout) {
 882                 event_add_timed(ctdb->ev, state,
 883                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 884                                 ctdb_control_timeout, state);
 885         }
 886
 887         talloc_free(c);
 888         return 0;
 889 }