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/tevent/tevent.h"
  21 #include "lib/tdb/include/tdb.h"
  22 #include "system/network.h"
  23 #include "system/filesys.h"
  24 #include "system/wait.h"
  25 #include "../include/ctdb_private.h"
  26 #include "lib/util/dlinklist.h"
  27 #include "db_wrap.h"
  28
  29
  30 struct ctdb_control_state {
  31         struct ctdb_context *ctdb;
  32         uint32_t reqid;
  33         ctdb_control_callback_fn_t callback;
  34         void *private_data;
  35         unsigned flags;
  36 };
  37
  38
  39 /*
  40   dump talloc memory hierarchy, returning it as a blob to the client
  41  */
  42 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  43 {
  44         /* dump to a file, then send the file as a blob */
  45         FILE *f;
  46         long fsize;
  47         f = tmpfile();
  48         if (f == NULL) {
  49                 DEBUG(DEBUG_ERR,(__location__ " Unable to open tmpfile - %s\n", strerror(errno)));
  50                 return -1;
  51         }
  52         talloc_report_full(NULL, f);
  53         fsize = ftell(f);
  54         rewind(f);
  55         outdata->dptr = talloc_size(outdata, fsize);
  56         CTDB_NO_MEMORY(ctdb, outdata->dptr);
  57         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  58         fclose(f);
  59         if (outdata->dsize != fsize) {
  60                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  61                 return -1;
  62         }
  63         return 0;
  64 }
  65
  66
  67 /*
  68   process a control request
  69  */
  70 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  71                                      struct ctdb_req_control *c,
  72                                      TDB_DATA indata,
  73                                      TDB_DATA *outdata, uint32_t srcnode,
  74                                      const char **errormsg,
  75                                      bool *async_reply)
  76 {
  77         uint32_t opcode = c->opcode;
  78         uint64_t srvid = c->srvid;
  79         uint32_t client_id = c->client_id;
  80
  81         switch (opcode) {
  82         case CTDB_CONTROL_PROCESS_EXISTS: {
  83                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  84                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  85         }
  86
  87         case CTDB_CONTROL_SET_DEBUG: {
  88                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
  89                 LogLevel = *(int32_t *)indata.dptr;
  90                 return 0;
  91         }
  92
  93         case CTDB_CONTROL_GET_DEBUG: {
  94                 CHECK_CONTROL_DATA_SIZE(0);
  95                 outdata->dptr = (uint8_t *)&LogLevel;
  96                 outdata->dsize = sizeof(LogLevel);
  97                 return 0;
  98         }
  99
 100         case CTDB_CONTROL_STATISTICS: {
 101                 int i;
 102                 CHECK_CONTROL_DATA_SIZE(0);
 103                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 104                 ctdb->statistics.frozen = 0;
 105                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 106                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 107                                 ctdb->statistics.frozen = 1;
 108                         }
 109                 }
 110                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 111                 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_SETVNNMAP:
 154                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 155
 156         case CTDB_CONTROL_PULL_DB:
 157                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 158                 return ctdb_control_pull_db(ctdb, indata, outdata);
 159
 160         case CTDB_CONTROL_SET_DMASTER:
 161                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
 162                 return ctdb_control_set_dmaster(ctdb, indata);
 163
 164         case CTDB_CONTROL_PUSH_DB:
 165                 return ctdb_control_push_db(ctdb, indata);
 166
 167         case CTDB_CONTROL_GET_RECMODE: {
 168                 int i;
 169                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 170                         return CTDB_RECOVERY_ACTIVE;
 171                 }
 172                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 173                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 174                                 return CTDB_RECOVERY_ACTIVE;
 175                         }
 176                 }
 177                 return CTDB_RECOVERY_NORMAL;
 178         }
 179
 180         case CTDB_CONTROL_SET_RECMASTER: {
 181                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 182         }
 183
 184         case CTDB_CONTROL_GET_RECMASTER:
 185                 return ctdb->recovery_master;
 186
 187         case CTDB_CONTROL_GET_PID:
 188                 return getpid();
 189
 190         case CTDB_CONTROL_GET_PNN:
 191                 return ctdb->pnn;
 192
 193         case CTDB_CONTROL_PING:
 194                 CHECK_CONTROL_DATA_SIZE(0);
 195                 return ctdb->statistics.num_clients;
 196
 197         case CTDB_CONTROL_GET_DBNAME: {
 198                 uint32_t db_id;
 199                 struct ctdb_db_context *ctdb_db;
 200
 201                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 202                 db_id = *(uint32_t *)indata.dptr;
 203                 ctdb_db = find_ctdb_db(ctdb, db_id);
 204                 if (ctdb_db == NULL) return -1;
 205                 outdata->dptr = discard_const(ctdb_db->db_name);
 206                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 207                 return 0;
 208         }
 209
 210         case CTDB_CONTROL_GETDBPATH: {
 211                 uint32_t db_id;
 212                 struct ctdb_db_context *ctdb_db;
 213
 214                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 215                 db_id = *(uint32_t *)indata.dptr;
 216                 ctdb_db = find_ctdb_db(ctdb, db_id);
 217                 if (ctdb_db == NULL) return -1;
 218                 outdata->dptr = discard_const(ctdb_db->db_path);
 219                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 220                 return 0;
 221         }
 222
 223         case CTDB_CONTROL_DB_ATTACH:
 224           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 225
 226         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 227           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 228
 229         case CTDB_CONTROL_SET_CALL: {
 230                 struct ctdb_control_set_call *sc =
 231                         (struct ctdb_control_set_call *)indata.dptr;
 232                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 233                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 234         }
 235
 236         case CTDB_CONTROL_TRAVERSE_START:
 237                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 238                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 239
 240         case CTDB_CONTROL_TRAVERSE_ALL:
 241                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 242
 243         case CTDB_CONTROL_TRAVERSE_DATA:
 244                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 245
 246         case CTDB_CONTROL_TRAVERSE_KILL:
 247                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 248                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 249
 250         case CTDB_CONTROL_REGISTER_SRVID:
 251                 return daemon_register_message_handler(ctdb, client_id, srvid);
 252
 253         case CTDB_CONTROL_DEREGISTER_SRVID:
 254                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 255
 256         case CTDB_CONTROL_ENABLE_SEQNUM:
 257                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 258                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 259
 260         case CTDB_CONTROL_UPDATE_SEQNUM:
 261                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 262                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 263
 264         case CTDB_CONTROL_FREEZE:
 265                 CHECK_CONTROL_DATA_SIZE(0);
 266                 return ctdb_control_freeze(ctdb, c, async_reply);
 267
 268         case CTDB_CONTROL_THAW:
 269                 CHECK_CONTROL_DATA_SIZE(0);
 270                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 271
 272         case CTDB_CONTROL_SET_RECMODE:
 273                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 274                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 275
 276         case CTDB_CONTROL_GET_MONMODE:
 277                 CHECK_CONTROL_DATA_SIZE(0);
 278                 return ctdb_monitoring_mode(ctdb);
 279
 280         case CTDB_CONTROL_ENABLE_MONITOR:
 281                 CHECK_CONTROL_DATA_SIZE(0);
 282                 ctdb_enable_monitoring(ctdb);
 283                 return 0;
 284
 285         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 286                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 287
 288         case CTDB_CONTROL_DISABLE_MONITOR:
 289                 CHECK_CONTROL_DATA_SIZE(0);
 290                 ctdb_disable_monitoring(ctdb);
 291                 return 0;
 292
 293         case CTDB_CONTROL_SHUTDOWN:
 294                 ctdb_stop_recoverd(ctdb);
 295                 ctdb_stop_keepalive(ctdb);
 296                 ctdb_stop_monitoring(ctdb);
 297                 ctdb_release_all_ips(ctdb);
 298                 if (ctdb->methods != NULL) {
 299                         ctdb->methods->shutdown(ctdb);
 300                 }
 301                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 302                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 303                 exit(0);
 304
 305         case CTDB_CONTROL_TAKEOVER_IPv4:
 306                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 307                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 308
 309         case CTDB_CONTROL_TAKEOVER_IP:
 310                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 311                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 312
 313         case CTDB_CONTROL_RELEASE_IPv4:
 314                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 315                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 316
 317         case CTDB_CONTROL_RELEASE_IP:
 318                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 319                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 320
 321         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 322                 CHECK_CONTROL_DATA_SIZE(0);
 323                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 324
 325         case CTDB_CONTROL_GET_PUBLIC_IPS:
 326                 CHECK_CONTROL_DATA_SIZE(0);
 327                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 328
 329         case CTDB_CONTROL_TCP_CLIENT:
 330                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 331
 332         case CTDB_CONTROL_STARTUP:
 333                 CHECK_CONTROL_DATA_SIZE(0);
 334                 return ctdb_control_startup(ctdb, srcnode);
 335
 336         case CTDB_CONTROL_TCP_ADD:
 337                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 338                 return ctdb_control_tcp_add(ctdb, indata, false);
 339
 340         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 341                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 342                 return ctdb_control_tcp_add(ctdb, indata, true);
 343
 344         case CTDB_CONTROL_TCP_REMOVE:
 345                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 346                 return ctdb_control_tcp_remove(ctdb, indata);
 347
 348         case CTDB_CONTROL_SET_TUNABLE:
 349                 return ctdb_control_set_tunable(ctdb, indata);
 350
 351         case CTDB_CONTROL_GET_TUNABLE:
 352                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 353
 354         case CTDB_CONTROL_LIST_TUNABLES:
 355                 return ctdb_control_list_tunables(ctdb, outdata);
 356
 357         case CTDB_CONTROL_MODIFY_FLAGS:
 358                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 359                 return ctdb_control_modflags(ctdb, indata);
 360
 361         case CTDB_CONTROL_KILL_TCP:
 362                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 363                 return ctdb_control_kill_tcp(ctdb, indata);
 364
 365         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 366                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 367                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 368
 369         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 370                 /* data size is verified in the called function */
 371                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 372
 373         case CTDB_CONTROL_REGISTER_SERVER_ID:
 374                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 375                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 376
 377         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 378                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 379                 return ctdb_control_unregister_server_id(ctdb, indata);
 380
 381         case CTDB_CONTROL_CHECK_SERVER_ID:
 382                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 383                 return ctdb_control_check_server_id(ctdb, indata);
 384
 385         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 386                 CHECK_CONTROL_DATA_SIZE(0);
 387                 return ctdb_control_get_server_id_list(ctdb, outdata);
 388
 389         case CTDB_CONTROL_PERSISTENT_STORE:
 390                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 391
 392         case CTDB_CONTROL_UPDATE_RECORD:
 393                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 394
 395         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 396                 return ctdb_control_send_gratious_arp(ctdb, indata);
 397
 398         case CTDB_CONTROL_TRANSACTION_START:
 399                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 400                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 401
 402         case CTDB_CONTROL_TRANSACTION_COMMIT:
 403                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 404                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 405
 406         case CTDB_CONTROL_WIPE_DATABASE:
 407                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 408                 return ctdb_control_wipe_database(ctdb, indata);
 409
 410         case CTDB_CONTROL_UPTIME:
 411                 return ctdb_control_uptime(ctdb, outdata);
 412
 413         case CTDB_CONTROL_START_RECOVERY:
 414                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 415
 416         case CTDB_CONTROL_END_RECOVERY:
 417                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 418
 419         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 420                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 421
 422         case CTDB_CONTROL_ADD_PUBLIC_IP:
 423                 return ctdb_control_add_public_address(ctdb, indata);
 424
 425         case CTDB_CONTROL_DEL_PUBLIC_IP:
 426                 return ctdb_control_del_public_address(ctdb, indata);
 427
 428         case CTDB_CONTROL_GET_CAPABILITIES:
 429                 return ctdb_control_get_capabilities(ctdb, outdata);
 430
 431         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 432                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 433
 434         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 435                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 436
 437         case CTDB_CONTROL_TRANS2_COMMIT:
 438         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 439                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 440
 441         case CTDB_CONTROL_TRANS2_ERROR:
 442                 return ctdb_control_trans2_error(ctdb, c);
 443
 444         case CTDB_CONTROL_TRANS2_FINISHED:
 445                 return ctdb_control_trans2_finished(ctdb, c);
 446
 447         case CTDB_CONTROL_TRANS2_ACTIVE:
 448                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 449                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 450
 451         case CTDB_CONTROL_TRANS3_COMMIT:
 452                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 453
 454         case CTDB_CONTROL_RECD_PING:
 455                 CHECK_CONTROL_DATA_SIZE(0);
 456                 return ctdb_control_recd_ping(ctdb);
 457
 458         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 459                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 460                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 461
 462         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 463                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 464                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 465                 return 0;
 466         case CTDB_CONTROL_GET_RECLOCK_FILE:
 467                 CHECK_CONTROL_DATA_SIZE(0);
 468                 if (ctdb->recovery_lock_file != NULL) {
 469                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 470                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 471                 }
 472                 return 0;
 473         case CTDB_CONTROL_SET_RECLOCK_FILE:
 474                 ctdb->tunable.verify_recovery_lock = 0;
 475                 if (ctdb->recovery_lock_file != NULL) {
 476                         talloc_free(ctdb->recovery_lock_file);
 477                         ctdb->recovery_lock_file = NULL;
 478                 }
 479                 if (indata.dsize > 0) {
 480                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 481                         ctdb->tunable.verify_recovery_lock = 1;
 482                 }
 483                 return 0;
 484
 485         case CTDB_CONTROL_STOP_NODE:
 486                 CHECK_CONTROL_DATA_SIZE(0);
 487                 return ctdb_control_stop_node(ctdb, c, async_reply);
 488
 489         case CTDB_CONTROL_CONTINUE_NODE:
 490                 CHECK_CONTROL_DATA_SIZE(0);
 491                 return ctdb_control_continue_node(ctdb);
 492
 493         case CTDB_CONTROL_SET_NATGWSTATE: {
 494                 uint32_t natgwstate;
 495
 496                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 497                 natgwstate = *(uint32_t *)indata.dptr;
 498                 if (natgwstate == 0) {
 499                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 500                 } else {
 501                         ctdb->capabilities |= CTDB_CAP_NATGW;
 502                 }
 503                 return 0;
 504         }
 505
 506         case CTDB_CONTROL_SET_LMASTERROLE: {
 507                 uint32_t lmasterrole;
 508
 509                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 510                 lmasterrole = *(uint32_t *)indata.dptr;
 511                 if (lmasterrole == 0) {
 512                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 513                 } else {
 514                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 515                 }
 516                 return 0;
 517         }
 518
 519         case CTDB_CONTROL_SET_RECMASTERROLE: {
 520                 uint32_t recmasterrole;
 521
 522                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 523                 recmasterrole = *(uint32_t *)indata.dptr;
 524                 if (recmasterrole == 0) {
 525                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 526                 } else {
 527                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 528                 }
 529                 return 0;
 530         }
 531
 532         case CTDB_CONTROL_ENABLE_SCRIPT:
 533                 return ctdb_control_enable_script(ctdb, indata);
 534
 535         case CTDB_CONTROL_DISABLE_SCRIPT:
 536                 return ctdb_control_disable_script(ctdb, indata);
 537
 538         case CTDB_CONTROL_SET_BAN_STATE:
 539                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 540                 return ctdb_control_set_ban_state(ctdb, indata);
 541
 542         case CTDB_CONTROL_GET_BAN_STATE:
 543                 CHECK_CONTROL_DATA_SIZE(0);
 544                 return ctdb_control_get_ban_state(ctdb, outdata);
 545
 546         case CTDB_CONTROL_SET_DB_PRIORITY:
 547                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 548                 return ctdb_control_set_db_priority(ctdb, indata);
 549
 550         case CTDB_CONTROL_GET_DB_PRIORITY: {
 551                 uint32_t db_id;
 552                 struct ctdb_db_context *ctdb_db;
 553
 554                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 555                 db_id = *(uint32_t *)indata.dptr;
 556                 ctdb_db = find_ctdb_db(ctdb, db_id);
 557                 if (ctdb_db == NULL) return -1;
 558                 return ctdb_db->priority;
 559         }
 560
 561         case CTDB_CONTROL_TRANSACTION_CANCEL:
 562                 CHECK_CONTROL_DATA_SIZE(0);
 563                 return ctdb_control_transaction_cancel(ctdb);
 564
 565         case CTDB_CONTROL_REGISTER_NOTIFY:
 566                 return ctdb_control_register_notify(ctdb, client_id, indata);
 567
 568         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 569                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 570                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 571
 572         case CTDB_CONTROL_GET_LOG:
 573                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 574                 return ctdb_control_get_log(ctdb, indata);
 575
 576         case CTDB_CONTROL_CLEAR_LOG:
 577                 return ctdb_control_clear_log(ctdb);
 578
 579         case CTDB_CONTROL_GET_DB_SEQNUM:
 580                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 581                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 582
 583         case CTDB_CONTROL_DB_SET_HEALTHY:
 584                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 585                 return ctdb_control_db_set_healthy(ctdb, indata);
 586
 587         case CTDB_CONTROL_DB_GET_HEALTH:
 588                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 589                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 590
 591         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 592                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 593                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 594
 595         case CTDB_CONTROL_GET_IFACES:
 596                 CHECK_CONTROL_DATA_SIZE(0);
 597                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 598
 599         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 600                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 601                 return ctdb_control_set_iface_link(ctdb, c, indata);
 602
 603         case CTDB_CONTROL_GET_STAT_HISTORY:
 604                 CHECK_CONTROL_DATA_SIZE(0);
 605                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 606
 607         default:
 608                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 609                 return -1;
 610         }
 611 }
 612
 613 /*
 614   send a reply for a ctdb control
 615  */
 616 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 617                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 618 {
 619         struct ctdb_reply_control *r;
 620         size_t len;
 621
 622         /* some controls send no reply */
 623         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 624                 return;
 625         }
 626
 627         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 628         if (errormsg) {
 629                 len += strlen(errormsg);
 630         }
 631         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 632         CTDB_NO_MEMORY_VOID(ctdb, r);
 633
 634         r->hdr.destnode     = c->hdr.srcnode;
 635         r->hdr.reqid        = c->hdr.reqid;
 636         r->status           = status;
 637         r->datalen          = outdata?outdata->dsize:0;
 638         if (outdata && outdata->dsize) {
 639                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 640         }
 641         if (errormsg) {
 642                 r->errorlen = strlen(errormsg);
 643                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 644         }
 645
 646         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 647
 648         talloc_free(r);
 649 }
 650
 651 /*
 652   called when a CTDB_REQ_CONTROL packet comes in
 653 */
 654 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 655 {
 656         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 657         TDB_DATA data, *outdata;
 658         int32_t status;
 659         bool async_reply = False;
 660         const char *errormsg = NULL;
 661
 662         data.dptr = &c->data[0];
 663         data.dsize = c->datalen;
 664
 665         outdata = talloc_zero(c, TDB_DATA);
 666
 667         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 668                                        &errormsg, &async_reply);
 669
 670         if (!async_reply) {
 671                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 672         }
 673 }
 674
 675 /*
 676   called when a CTDB_REPLY_CONTROL packet comes in
 677 */
 678 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 679 {
 680         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 681         TDB_DATA data;
 682         struct ctdb_control_state *state;
 683         const char *errormsg = NULL;
 684
 685         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 686         if (state == NULL) {
 687                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 688                          ctdb->pnn, hdr->reqid));
 689                 return;
 690         }
 691
 692         if (hdr->reqid != state->reqid) {
 693                 /* we found a record  but it was the wrong one */
 694                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 695                 return;
 696         }
 697
 698         data.dptr = &c->data[0];
 699         data.dsize = c->datalen;
 700         if (c->errorlen) {
 701                 errormsg = talloc_strndup(state,
 702                                           (char *)&c->data[c->datalen], c->errorlen);
 703         }
 704
 705         /* make state a child of the packet, so it goes away when the packet
 706            is freed. */
 707         talloc_steal(hdr, state);
 708
 709         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 710 }
 711
 712 static int ctdb_control_destructor(struct ctdb_control_state *state)
 713 {
 714         ctdb_reqid_remove(state->ctdb, state->reqid);
 715         return 0;
 716 }
 717
 718 /*
 719   handle a timeout of a control
 720  */
 721 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 722                        struct timeval t, void *private_data)
 723 {
 724         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 725         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 726
 727         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 728
 729         talloc_steal(tmp_ctx, state);
 730
 731         state->callback(state->ctdb, -1, tdb_null,
 732                         "ctdb_control timed out",
 733                         state->private_data);
 734         talloc_free(tmp_ctx);
 735 }
 736
 737
 738 /*
 739   send a control message to a node
 740  */
 741 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 742                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 743                              uint32_t flags,
 744                              TDB_DATA data,
 745                              ctdb_control_callback_fn_t callback,
 746                              void *private_data)
 747 {
 748         struct ctdb_req_control *c;
 749         struct ctdb_control_state *state;
 750         size_t len;
 751
 752         if (ctdb->methods == NULL) {
 753                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 754                 return -1;
 755         }
 756
 757         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 758              (destnode == CTDB_BROADCAST_ALL) ||
 759              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 760             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 761                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 762                 return -1;
 763         }
 764
 765         if (destnode != CTDB_BROADCAST_VNNMAP &&
 766             destnode != CTDB_BROADCAST_ALL &&
 767             destnode != CTDB_BROADCAST_CONNECTED &&
 768             (!ctdb_validate_pnn(ctdb, destnode) ||
 769              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 770                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 771                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 772                 }
 773                 return 0;
 774         }
 775
 776         /* the state is made a child of private_data if possible. This means any reply
 777            will be discarded if the private_data goes away */
 778         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 779         CTDB_NO_MEMORY(ctdb, state);
 780
 781         state->reqid = ctdb_reqid_new(ctdb, state);
 782         state->callback = callback;
 783         state->private_data = private_data;
 784         state->ctdb = ctdb;
 785         state->flags = flags;
 786
 787         talloc_set_destructor(state, ctdb_control_destructor);
 788
 789         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 790         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 791                                     struct ctdb_req_control);
 792         CTDB_NO_MEMORY(ctdb, c);
 793         talloc_set_name_const(c, "ctdb_req_control packet");
 794
 795         c->hdr.destnode     = destnode;
 796         c->hdr.reqid        = state->reqid;
 797         c->opcode           = opcode;
 798         c->client_id        = client_id;
 799         c->flags            = flags;
 800         c->srvid            = srvid;
 801         c->datalen          = data.dsize;
 802         if (data.dsize) {
 803                 memcpy(&c->data[0], data.dptr, data.dsize);
 804         }
 805
 806         ctdb_queue_packet(ctdb, &c->hdr);
 807
 808         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 809                 talloc_free(state);
 810                 return 0;
 811         }
 812
 813         if (ctdb->tunable.control_timeout) {
 814                 event_add_timed(ctdb->ev, state,
 815                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 816                                 ctdb_control_timeout, state);
 817         }
 818
 819         talloc_free(c);
 820         return 0;
 821 }