ctdb/server/ctdb_control.c

   1 /*
   2    ctdb_control protocol code
   3
   4    Copyright (C) Andrew Tridgell  2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "replace.h"
  20 #include "system/network.h"
  21 #include "system/filesys.h"
  22 #include "system/wait.h"
  23
  24 #include <talloc.h>
  25 #include <tevent.h>
  26
  27 #include "lib/tdb_wrap/tdb_wrap.h"
  28 #include "lib/util/dlinklist.h"
  29 #include "lib/util/debug.h"
  30 #include "lib/util/samba_util.h"
  31 #include "lib/util/talloc_report.h"
  32
  33 #include "ctdb_private.h"
  34 #include "ctdb_client.h"
  35
  36 #include "common/reqid.h"
  37 #include "common/common.h"
  38 #include "common/logging.h"
  39
  40
  41 struct ctdb_control_state {
  42         struct ctdb_context *ctdb;
  43         uint32_t reqid;
  44         ctdb_control_callback_fn_t callback;
  45         void *private_data;
  46         unsigned flags;
  47 };
  48
  49
  50 /*
  51   dump talloc memory hierarchy, returning it as a blob to the client
  52  */
  53 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  54 {
  55         char *report;
  56         size_t reportlen;
  57
  58         report = talloc_report_str(outdata, NULL);
  59         if (report == NULL) {
  60                 DEBUG(DEBUG_ERR,
  61                       (__location__ " talloc_report_str failed\n"));
  62                 return -1;
  63         }
  64         reportlen = talloc_get_size(report);
  65
  66         if (reportlen > 0) {
  67                 reportlen -= 1; /* strip trailing zero */
  68         }
  69
  70         outdata->dptr = (uint8_t *)report;
  71         outdata->dsize = reportlen;
  72         return 0;
  73 }
  74
  75 static int32_t control_not_implemented(const char *unsupported,
  76                                        const char *alternate)
  77 {
  78         if (alternate == NULL) {
  79                 DEBUG(DEBUG_ERR,
  80                       ("Control %s is not implemented any more\n",
  81                        unsupported));
  82         } else {
  83                 DEBUG(DEBUG_ERR,
  84                       ("Control %s is not implemented any more, use %s instead\n",
  85                        unsupported, alternate));
  86         }
  87         return -1;
  88 }
  89
  90 /*
  91   process a control request
  92  */
  93 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  94                                      struct ctdb_req_control_old *c,
  95                                      TDB_DATA indata,
  96                                      TDB_DATA *outdata, uint32_t srcnode,
  97                                      const char **errormsg,
  98                                      bool *async_reply)
  99 {
 100         uint32_t opcode = c->opcode;
 101         uint64_t srvid = c->srvid;
 102         uint32_t client_id = c->client_id;
 103
 104         switch (opcode) {
 105         case CTDB_CONTROL_PROCESS_EXISTS: {
 106                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
 107                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
 108         }
 109
 110         case CTDB_CONTROL_SET_DEBUG: {
 111                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
 112                 DEBUGLEVEL = *(int32_t *)indata.dptr;
 113                 return 0;
 114         }
 115
 116         case CTDB_CONTROL_GET_DEBUG: {
 117                 CHECK_CONTROL_DATA_SIZE(0);
 118                 outdata->dptr = (uint8_t *)&(DEBUGLEVEL);
 119                 outdata->dsize = sizeof(DEBUGLEVEL);
 120                 return 0;
 121         }
 122
 123         case CTDB_CONTROL_STATISTICS: {
 124                 CHECK_CONTROL_DATA_SIZE(0);
 125                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 126                 ctdb->statistics.num_clients = ctdb->num_clients;
 127                 ctdb->statistics.frozen = (ctdb_db_all_frozen(ctdb) ? 1 : 0);
 128                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 129                 ctdb->statistics.statistics_current_time = timeval_current();
 130
 131                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 132                 outdata->dsize = sizeof(ctdb->statistics);
 133                 return 0;
 134         }
 135
 136         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 137                 CHECK_CONTROL_DATA_SIZE(0);
 138                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 139                 outdata->dsize = sizeof(ctdb->tunable);
 140                 return 0;
 141         }
 142
 143         case CTDB_CONTROL_DUMP_MEMORY: {
 144                 CHECK_CONTROL_DATA_SIZE(0);
 145                 return ctdb_dump_memory(ctdb, outdata);
 146         }
 147
 148         case CTDB_CONTROL_STATISTICS_RESET: {
 149                 struct ctdb_db_context *ctdb_db;
 150
 151                 CHECK_CONTROL_DATA_SIZE(0);
 152                 ZERO_STRUCT(ctdb->statistics);
 153                 for (ctdb_db = ctdb->db_list;
 154                      ctdb_db != NULL;
 155                      ctdb_db = ctdb_db->next) {
 156                         ctdb_db_statistics_reset(ctdb_db);
 157                 }
 158                 ctdb->statistics.statistics_start_time = timeval_current();
 159                 return 0;
 160         }
 161
 162         case CTDB_CONTROL_GETVNNMAP:
 163                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 164
 165         case CTDB_CONTROL_GET_DBMAP:
 166                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 167
 168         case CTDB_CONTROL_GET_NODEMAPv4:
 169                 return control_not_implemented("GET_NODEMAPv4", "GET_NODEMAP");
 170
 171         case CTDB_CONTROL_GET_NODEMAP:
 172                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 173
 174         case CTDB_CONTROL_GET_NODES_FILE:
 175                 return ctdb_control_getnodesfile(ctdb, opcode, indata, outdata);
 176
 177         case CTDB_CONTROL_RELOAD_NODES_FILE:
 178                 CHECK_CONTROL_DATA_SIZE(0);
 179                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 180
 181         case CTDB_CONTROL_SET_DB_STICKY: {
 182                 uint32_t db_id;
 183                 struct ctdb_db_context *ctdb_db;
 184
 185                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 186                 db_id = *(uint32_t *)indata.dptr;
 187                 ctdb_db = find_ctdb_db(ctdb, db_id);
 188                 if (ctdb_db == NULL) return -1;
 189                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 190         }
 191
 192         case CTDB_CONTROL_SETVNNMAP:
 193                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 194
 195         case CTDB_CONTROL_PULL_DB:
 196                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb));
 197                 return ctdb_control_pull_db(ctdb, indata, outdata);
 198
 199         case CTDB_CONTROL_SET_DMASTER:
 200                 return control_not_implemented("SET_DMASTER", NULL);
 201
 202         case CTDB_CONTROL_PUSH_DB:
 203                 return ctdb_control_push_db(ctdb, indata);
 204
 205         case CTDB_CONTROL_GET_RECMODE: {
 206                 return ctdb->recovery_mode;
 207         }
 208
 209         case CTDB_CONTROL_SET_RECMASTER: {
 210                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 211         }
 212
 213         case CTDB_CONTROL_GET_RECMASTER:
 214                 return ctdb->recovery_master;
 215
 216         case CTDB_CONTROL_GET_PID:
 217                 return getpid();
 218
 219         case CTDB_CONTROL_GET_PNN:
 220                 return ctdb->pnn;
 221
 222         case CTDB_CONTROL_PING:
 223                 CHECK_CONTROL_DATA_SIZE(0);
 224                 return ctdb->num_clients;
 225
 226         case CTDB_CONTROL_GET_RUNSTATE:
 227                 CHECK_CONTROL_DATA_SIZE(0);
 228                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 229                 outdata->dsize = sizeof(uint32_t);
 230                 return 0;
 231
 232
 233         case CTDB_CONTROL_SET_DB_READONLY: {
 234                 uint32_t db_id;
 235                 struct ctdb_db_context *ctdb_db;
 236
 237                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 238                 db_id = *(uint32_t *)indata.dptr;
 239                 ctdb_db = find_ctdb_db(ctdb, db_id);
 240                 if (ctdb_db == NULL) return -1;
 241                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 242         }
 243         case CTDB_CONTROL_GET_DBNAME: {
 244                 uint32_t db_id;
 245                 struct ctdb_db_context *ctdb_db;
 246
 247                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 248                 db_id = *(uint32_t *)indata.dptr;
 249                 ctdb_db = find_ctdb_db(ctdb, db_id);
 250                 if (ctdb_db == NULL) return -1;
 251                 outdata->dptr = discard_const(ctdb_db->db_name);
 252                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 253                 return 0;
 254         }
 255
 256         case CTDB_CONTROL_GETDBPATH: {
 257                 uint32_t db_id;
 258                 struct ctdb_db_context *ctdb_db;
 259
 260                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 261                 db_id = *(uint32_t *)indata.dptr;
 262                 ctdb_db = find_ctdb_db(ctdb, db_id);
 263                 if (ctdb_db == NULL) return -1;
 264                 outdata->dptr = discard_const(ctdb_db->db_path);
 265                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 266                 return 0;
 267         }
 268
 269         case CTDB_CONTROL_DB_ATTACH:
 270           return ctdb_control_db_attach(ctdb, indata, outdata, 0, client_id,
 271                                         c, async_reply);
 272
 273         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 274           return ctdb_control_db_attach(ctdb, indata, outdata,
 275                                         CTDB_DB_FLAGS_PERSISTENT, client_id,
 276                                         c, async_reply);
 277
 278         case CTDB_CONTROL_DB_ATTACH_REPLICATED:
 279           return ctdb_control_db_attach(ctdb, indata, outdata,
 280                                         CTDB_DB_FLAGS_REPLICATED, client_id,
 281                                         c, async_reply);
 282
 283         case CTDB_CONTROL_SET_CALL:
 284                 return control_not_implemented("SET_CALL", NULL);
 285
 286         case CTDB_CONTROL_TRAVERSE_START:
 287                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 288                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 289
 290         case CTDB_CONTROL_TRAVERSE_START_EXT:
 291                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 292                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 293
 294         case CTDB_CONTROL_TRAVERSE_ALL:
 295                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 296
 297         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 298                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 299
 300         case CTDB_CONTROL_TRAVERSE_DATA:
 301                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 302
 303         case CTDB_CONTROL_TRAVERSE_KILL:
 304                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 305                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 306
 307         case CTDB_CONTROL_REGISTER_SRVID:
 308                 return daemon_register_message_handler(ctdb, client_id, srvid);
 309
 310         case CTDB_CONTROL_DEREGISTER_SRVID:
 311                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 312
 313         case CTDB_CONTROL_CHECK_SRVIDS:
 314                 return control_not_implemented("CHECK_SRVIDS", NULL);
 315
 316         case CTDB_CONTROL_ENABLE_SEQNUM:
 317                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 318                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 319
 320         case CTDB_CONTROL_UPDATE_SEQNUM:
 321                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 322                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 323
 324         case CTDB_CONTROL_FREEZE:
 325                 CHECK_CONTROL_DATA_SIZE(0);
 326                 return ctdb_control_freeze(ctdb, c, async_reply);
 327
 328         case CTDB_CONTROL_THAW:
 329                 return control_not_implemented("THAW", NULL);
 330
 331         case CTDB_CONTROL_SET_RECMODE:
 332                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 333                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 334
 335         case CTDB_CONTROL_GET_MONMODE:
 336                 return control_not_implemented("GET_MONMODE", NULL);
 337
 338         case CTDB_CONTROL_ENABLE_MONITOR:
 339                 return control_not_implemented("ENABLE_MONITOR", NULL);
 340
 341         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 342                 return control_not_implemented("RUN_EVENTSCRIPTS", NULL);
 343
 344         case CTDB_CONTROL_DISABLE_MONITOR:
 345                 return control_not_implemented("DISABLE_MONITOR", NULL);
 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                 return control_not_implemented("TAKEOVER_IPv4", "TAKEOVER_IP");
 355
 356         case CTDB_CONTROL_TAKEOVER_IP:
 357                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 358                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 359
 360         case CTDB_CONTROL_RELEASE_IPv4:
 361                 return control_not_implemented("RELEASE_IPv4", "RELEASE_IP");
 362
 363         case CTDB_CONTROL_RELEASE_IP:
 364                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 365                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 366
 367         case CTDB_CONTROL_IPREALLOCATED:
 368                 CHECK_CONTROL_DATA_SIZE(0);
 369                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 370
 371         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 372                 return control_not_implemented("GET_PUBLIC_IPSv4",
 373                                                "GET_PUBLIC_IPS");
 374
 375         case CTDB_CONTROL_GET_PUBLIC_IPS:
 376                 CHECK_CONTROL_DATA_SIZE(0);
 377                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 378
 379         case CTDB_CONTROL_TCP_CLIENT:
 380                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 381                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 382
 383         case CTDB_CONTROL_STARTUP:
 384                 CHECK_CONTROL_DATA_SIZE(0);
 385                 return ctdb_control_startup(ctdb, srcnode);
 386
 387         case CTDB_CONTROL_TCP_ADD:
 388                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 389                 return ctdb_control_tcp_add(ctdb, indata, false);
 390
 391         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 392                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 393                 return ctdb_control_tcp_add(ctdb, indata, true);
 394
 395         case CTDB_CONTROL_TCP_REMOVE:
 396                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 397                 return ctdb_control_tcp_remove(ctdb, indata);
 398
 399         case CTDB_CONTROL_SET_TUNABLE:
 400                 return ctdb_control_set_tunable(ctdb, indata);
 401
 402         case CTDB_CONTROL_GET_TUNABLE:
 403                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 404
 405         case CTDB_CONTROL_LIST_TUNABLES:
 406                 return ctdb_control_list_tunables(ctdb, outdata);
 407
 408         case CTDB_CONTROL_MODIFY_FLAGS:
 409                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 410                 return ctdb_control_modflags(ctdb, indata);
 411
 412         case CTDB_CONTROL_KILL_TCP:
 413                 return control_not_implemented("KILL_TCP", NULL);
 414
 415         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 416                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 417                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 418
 419         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 420                 /* data size is verified in the called function */
 421                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 422
 423         case CTDB_CONTROL_REGISTER_SERVER_ID:
 424                 return control_not_implemented("REGISTER_SERVER_ID", NULL);
 425
 426         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 427                 return control_not_implemented("UNREGISTER_SERVER_ID", NULL);
 428
 429         case CTDB_CONTROL_CHECK_SERVER_ID:
 430                 return control_not_implemented("CHECK_SERVER_ID", NULL);
 431
 432         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 433                 return control_not_implemented("SERVER_ID_LIST", NULL);
 434
 435         case CTDB_CONTROL_PERSISTENT_STORE:
 436                 return control_not_implemented("PERSISTENT_STORE", NULL);
 437
 438         case CTDB_CONTROL_UPDATE_RECORD:
 439                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 440
 441         case CTDB_CONTROL_SEND_GRATUITOUS_ARP:
 442                 return ctdb_control_send_gratious_arp(ctdb, indata);
 443
 444         case CTDB_CONTROL_TRANSACTION_START:
 445                 return control_not_implemented("TRANSACTION_START", NULL);
 446
 447         case CTDB_CONTROL_TRANSACTION_COMMIT:
 448                 return control_not_implemented("TRANSACTION_COMMIT", NULL);
 449
 450         case CTDB_CONTROL_WIPE_DATABASE:
 451                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 452                 return ctdb_control_wipe_database(ctdb, indata);
 453
 454         case CTDB_CONTROL_UPTIME:
 455                 return ctdb_control_uptime(ctdb, outdata);
 456
 457         case CTDB_CONTROL_START_RECOVERY:
 458                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 459
 460         case CTDB_CONTROL_END_RECOVERY:
 461                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 462
 463         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 464                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 465
 466         case CTDB_CONTROL_ADD_PUBLIC_IP:
 467                 return ctdb_control_add_public_address(ctdb, indata);
 468
 469         case CTDB_CONTROL_DEL_PUBLIC_IP:
 470                 return ctdb_control_del_public_address(ctdb, indata);
 471
 472         case CTDB_CONTROL_GET_CAPABILITIES:
 473                 return ctdb_control_get_capabilities(ctdb, outdata);
 474
 475         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 476                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 477
 478         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 479                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 480
 481         case CTDB_CONTROL_TRANS2_COMMIT:
 482         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 483                 return control_not_implemented("TRANS2_COMMIT", "TRANS3_COMMIT");
 484
 485         case CTDB_CONTROL_TRANS2_ERROR:
 486                 return control_not_implemented("TRANS2_ERROR", NULL);
 487
 488         case CTDB_CONTROL_TRANS2_FINISHED:
 489                 return control_not_implemented("TRANS2_FINISHED", NULL);
 490
 491         case CTDB_CONTROL_TRANS2_ACTIVE:
 492                 return control_not_implemented("TRANS2_ACTIVE", NULL);
 493
 494         case CTDB_CONTROL_TRANS3_COMMIT:
 495                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 496
 497         case CTDB_CONTROL_RECD_PING:
 498                 CHECK_CONTROL_DATA_SIZE(0);
 499                 return ctdb_control_recd_ping(ctdb);
 500
 501         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 502                 return control_not_implemented("GET_EVENT_SCRIPT_STATUS", NULL);
 503
 504         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 505                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 506                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 507                 return 0;
 508         case CTDB_CONTROL_GET_RECLOCK_FILE:
 509                 CHECK_CONTROL_DATA_SIZE(0);
 510                 if (ctdb->recovery_lock != NULL) {
 511                         outdata->dptr  = discard_const(ctdb->recovery_lock);
 512                         outdata->dsize = strlen(ctdb->recovery_lock) + 1;
 513                 }
 514                 return 0;
 515         case CTDB_CONTROL_SET_RECLOCK_FILE:
 516                 return control_not_implemented("SET_RECLOCK", NULL);
 517
 518         case CTDB_CONTROL_STOP_NODE:
 519                 CHECK_CONTROL_DATA_SIZE(0);
 520                 return ctdb_control_stop_node(ctdb);
 521
 522         case CTDB_CONTROL_CONTINUE_NODE:
 523                 CHECK_CONTROL_DATA_SIZE(0);
 524                 return ctdb_control_continue_node(ctdb);
 525
 526         case CTDB_CONTROL_SET_NATGWSTATE:
 527                 return control_not_implemented("SET_NATGWSTATE", NULL);
 528
 529         case CTDB_CONTROL_SET_LMASTERROLE: {
 530                 uint32_t lmasterrole;
 531
 532                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 533                 lmasterrole = *(uint32_t *)indata.dptr;
 534                 if (lmasterrole == 0) {
 535                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 536                 } else {
 537                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 538                 }
 539                 return 0;
 540         }
 541
 542         case CTDB_CONTROL_SET_RECMASTERROLE: {
 543                 uint32_t recmasterrole;
 544
 545                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 546                 recmasterrole = *(uint32_t *)indata.dptr;
 547                 if (recmasterrole == 0) {
 548                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 549                 } else {
 550                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 551                 }
 552                 return 0;
 553         }
 554
 555         case CTDB_CONTROL_ENABLE_SCRIPT:
 556                 return control_not_implemented("ENABLE_SCRIPT", NULL);
 557
 558         case CTDB_CONTROL_DISABLE_SCRIPT:
 559                 return control_not_implemented("DISABLE_SCRIPT", NULL);
 560
 561         case CTDB_CONTROL_SET_BAN_STATE:
 562                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_state));
 563                 return ctdb_control_set_ban_state(ctdb, indata);
 564
 565         case CTDB_CONTROL_GET_BAN_STATE:
 566                 CHECK_CONTROL_DATA_SIZE(0);
 567                 return ctdb_control_get_ban_state(ctdb, outdata);
 568
 569         case CTDB_CONTROL_SET_DB_PRIORITY:
 570                 return control_not_implemented("SET_DB_PRIORITY", NULL);
 571
 572         case CTDB_CONTROL_GET_DB_PRIORITY:
 573                 return control_not_implemented("GET_DB_PRIORITY", NULL);
 574
 575         case CTDB_CONTROL_TRANSACTION_CANCEL:
 576                 return control_not_implemented("TRANSACTION_CANCEL", NULL);
 577
 578         case CTDB_CONTROL_REGISTER_NOTIFY:
 579                 return ctdb_control_register_notify(ctdb, client_id, indata);
 580
 581         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 582                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 583                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 584
 585         case CTDB_CONTROL_GET_LOG:
 586                 return control_not_implemented("GET_LOG", NULL);
 587
 588         case CTDB_CONTROL_CLEAR_LOG:
 589                 return control_not_implemented("CLEAR_LOG", NULL);
 590
 591         case CTDB_CONTROL_GET_DB_SEQNUM:
 592                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 593                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 594
 595         case CTDB_CONTROL_DB_SET_HEALTHY:
 596                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 597                 return ctdb_control_db_set_healthy(ctdb, indata);
 598
 599         case CTDB_CONTROL_DB_GET_HEALTH:
 600                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 601                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 602
 603         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 604                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 605                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 606
 607         case CTDB_CONTROL_GET_IFACES:
 608                 CHECK_CONTROL_DATA_SIZE(0);
 609                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 610
 611         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 612                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_iface));
 613                 return ctdb_control_set_iface_link(ctdb, c, indata);
 614
 615         case CTDB_CONTROL_GET_STAT_HISTORY:
 616                 CHECK_CONTROL_DATA_SIZE(0);
 617                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 618
 619         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 620                 struct ctdb_control_schedule_for_deletion *d;
 621                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 622                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 623                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 624                 size += d->keylen;
 625                 CHECK_CONTROL_DATA_SIZE(size);
 626                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 627         }
 628         case CTDB_CONTROL_GET_DB_STATISTICS:
 629                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 630                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 631
 632         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 633                 CHECK_CONTROL_DATA_SIZE(0);
 634                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 635
 636         case CTDB_CONTROL_RECEIVE_RECORDS:
 637                 return ctdb_control_receive_records(ctdb, indata, outdata);
 638
 639         case CTDB_CONTROL_DB_DETACH:
 640                 return ctdb_control_db_detach(ctdb, indata, client_id);
 641
 642         case CTDB_CONTROL_DB_FREEZE:
 643                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 644                 return ctdb_control_db_freeze(ctdb, c, *(uint32_t *)indata.dptr,
 645                                               async_reply);
 646
 647         case CTDB_CONTROL_DB_THAW:
 648                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 649                 return ctdb_control_db_thaw(ctdb, *(uint32_t *)indata.dptr);
 650
 651         case CTDB_CONTROL_DB_TRANSACTION_START:
 652                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 653                 return ctdb_control_db_transaction_start(ctdb, indata);
 654
 655         case CTDB_CONTROL_DB_TRANSACTION_COMMIT:
 656                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 657                 return ctdb_control_db_transaction_commit(ctdb, indata);
 658
 659         case CTDB_CONTROL_DB_TRANSACTION_CANCEL:
 660                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 661                 return ctdb_control_db_transaction_cancel(ctdb, indata);
 662
 663         case CTDB_CONTROL_DB_PULL:
 664                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 665                 return ctdb_control_db_pull(ctdb, c, indata, outdata);
 666
 667         case CTDB_CONTROL_DB_PUSH_START:
 668                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 669                 return ctdb_control_db_push_start(ctdb, indata);
 670
 671         case CTDB_CONTROL_DB_PUSH_CONFIRM:
 672                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 673                 return ctdb_control_db_push_confirm(ctdb, indata, outdata);
 674
 675         case CTDB_CONTROL_DB_OPEN_FLAGS: {
 676                 uint32_t db_id;
 677                 struct ctdb_db_context *ctdb_db;
 678                 int tdb_flags;
 679
 680                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 681                 db_id = *(uint32_t *)indata.dptr;
 682                 ctdb_db = find_ctdb_db(ctdb, db_id);
 683                 if (ctdb_db == NULL) {
 684                         return -1;
 685                 }
 686
 687                 tdb_flags = tdb_get_flags(ctdb_db->ltdb->tdb);
 688
 689                 outdata->dptr = talloc_size(outdata, sizeof(tdb_flags));
 690                 if (outdata->dptr == NULL) {
 691                         return -1;
 692                 }
 693
 694                 outdata->dsize = sizeof(tdb_flags);
 695                 memcpy(outdata->dptr, &tdb_flags, outdata->dsize);
 696                 return 0;
 697         }
 698
 699         default:
 700                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 701                 return -1;
 702         }
 703 }
 704
 705 /*
 706   send a reply for a ctdb control
 707  */
 708 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control_old *c,
 709                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 710 {
 711         struct ctdb_reply_control_old *r;
 712         size_t len;
 713
 714         /* some controls send no reply */
 715         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 716                 return;
 717         }
 718
 719         len = offsetof(struct ctdb_reply_control_old, data) + (outdata?outdata->dsize:0);
 720         if (errormsg) {
 721                 len += strlen(errormsg);
 722         }
 723         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control_old);
 724         if (r == NULL) {
 725                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 726                 return;
 727         }
 728
 729         r->hdr.destnode     = c->hdr.srcnode;
 730         r->hdr.reqid        = c->hdr.reqid;
 731         r->status           = status;
 732         r->datalen          = outdata?outdata->dsize:0;
 733         if (outdata && outdata->dsize) {
 734                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 735         }
 736         if (errormsg) {
 737                 r->errorlen = strlen(errormsg);
 738                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 739         }
 740
 741         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 742
 743         talloc_free(r);
 744 }
 745
 746 /*
 747   called when a CTDB_REQ_CONTROL packet comes in
 748 */
 749 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 750 {
 751         struct ctdb_req_control_old *c = (struct ctdb_req_control_old *)hdr;
 752         TDB_DATA data, *outdata;
 753         int32_t status;
 754         bool async_reply = false;
 755         const char *errormsg = NULL;
 756
 757         data.dptr = &c->data[0];
 758         data.dsize = c->datalen;
 759
 760         outdata = talloc_zero(c, TDB_DATA);
 761
 762         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 763                                        &errormsg, &async_reply);
 764
 765         if (!async_reply) {
 766                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 767         }
 768 }
 769
 770 /*
 771   called when a CTDB_REPLY_CONTROL packet comes in
 772 */
 773 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 774 {
 775         struct ctdb_reply_control_old *c = (struct ctdb_reply_control_old *)hdr;
 776         TDB_DATA data;
 777         struct ctdb_control_state *state;
 778         const char *errormsg = NULL;
 779
 780         state = reqid_find(ctdb->idr, hdr->reqid, struct ctdb_control_state);
 781         if (state == NULL) {
 782                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 783                          ctdb->pnn, hdr->reqid));
 784                 return;
 785         }
 786
 787         if (hdr->reqid != state->reqid) {
 788                 /* we found a record  but it was the wrong one */
 789                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 790                 return;
 791         }
 792
 793         data.dptr = &c->data[0];
 794         data.dsize = c->datalen;
 795         if (c->errorlen) {
 796                 errormsg = talloc_strndup(state,
 797                                           (char *)&c->data[c->datalen], c->errorlen);
 798         }
 799
 800         /* make state a child of the packet, so it goes away when the packet
 801            is freed. */
 802         talloc_steal(hdr, state);
 803
 804         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 805 }
 806
 807 static int ctdb_control_destructor(struct ctdb_control_state *state)
 808 {
 809         reqid_remove(state->ctdb->idr, state->reqid);
 810         return 0;
 811 }
 812
 813 /*
 814   handle a timeout of a control
 815  */
 816 static void ctdb_control_timeout(struct tevent_context *ev,
 817                                  struct tevent_timer *te,
 818                                  struct timeval t, void *private_data)
 819 {
 820         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 821         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 822
 823         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 824
 825         talloc_steal(tmp_ctx, state);
 826
 827         state->callback(state->ctdb, -1, tdb_null,
 828                         "ctdb_control timed out",
 829                         state->private_data);
 830         talloc_free(tmp_ctx);
 831 }
 832
 833
 834 /*
 835   send a control message to a node
 836  */
 837 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 838                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 839                              uint32_t flags,
 840                              TDB_DATA data,
 841                              ctdb_control_callback_fn_t callback,
 842                              void *private_data)
 843 {
 844         struct ctdb_req_control_old *c;
 845         struct ctdb_control_state *state;
 846         size_t len;
 847
 848         if (ctdb->methods == NULL) {
 849                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 850                 return -1;
 851         }
 852
 853         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 854              (destnode == CTDB_BROADCAST_ALL) ||
 855              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 856             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 857                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 858                 return -1;
 859         }
 860
 861         if (destnode != CTDB_BROADCAST_VNNMAP &&
 862             destnode != CTDB_BROADCAST_ALL &&
 863             destnode != CTDB_BROADCAST_CONNECTED &&
 864             (!ctdb_validate_pnn(ctdb, destnode) ||
 865              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 866                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 867                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 868                 }
 869                 return 0;
 870         }
 871
 872         /* the state is made a child of private_data if possible. This means any reply
 873            will be discarded if the private_data goes away */
 874         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 875         CTDB_NO_MEMORY(ctdb, state);
 876
 877         state->reqid = reqid_new(ctdb->idr, state);
 878         state->callback = callback;
 879         state->private_data = private_data;
 880         state->ctdb = ctdb;
 881         state->flags = flags;
 882
 883         talloc_set_destructor(state, ctdb_control_destructor);
 884
 885         len = offsetof(struct ctdb_req_control_old, data) + data.dsize;
 886         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 887                                     struct ctdb_req_control_old);
 888         CTDB_NO_MEMORY(ctdb, c);
 889         talloc_set_name_const(c, "ctdb_req_control packet");
 890
 891         c->hdr.destnode     = destnode;
 892         c->hdr.reqid        = state->reqid;
 893         c->opcode           = opcode;
 894         c->client_id        = client_id;
 895         c->flags            = flags;
 896         c->srvid            = srvid;
 897         c->datalen          = data.dsize;
 898         if (data.dsize) {
 899                 memcpy(&c->data[0], data.dptr, data.dsize);
 900         }
 901
 902         ctdb_queue_packet(ctdb, &c->hdr);
 903
 904         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 905                 talloc_free(state);
 906                 return 0;
 907         }
 908
 909         if (ctdb->tunable.control_timeout) {
 910                 tevent_add_timer(ctdb->ev, state,
 911                                  timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 912                                  ctdb_control_timeout, state);
 913         }
 914
 915         talloc_free(c);
 916         return 0;
 917 }