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, srvid, false, client_id, c, async_reply);
 271
 272         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 273           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 274
 275         case CTDB_CONTROL_SET_CALL:
 276                 return control_not_implemented("SET_CALL", NULL);
 277
 278         case CTDB_CONTROL_TRAVERSE_START:
 279                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 280                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 281
 282         case CTDB_CONTROL_TRAVERSE_START_EXT:
 283                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 284                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 285
 286         case CTDB_CONTROL_TRAVERSE_ALL:
 287                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 288
 289         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 290                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 291
 292         case CTDB_CONTROL_TRAVERSE_DATA:
 293                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 294
 295         case CTDB_CONTROL_TRAVERSE_KILL:
 296                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 297                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 298
 299         case CTDB_CONTROL_REGISTER_SRVID:
 300                 return daemon_register_message_handler(ctdb, client_id, srvid);
 301
 302         case CTDB_CONTROL_DEREGISTER_SRVID:
 303                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 304
 305         case CTDB_CONTROL_CHECK_SRVIDS:
 306                 return daemon_check_srvids(ctdb, indata, outdata);
 307
 308         case CTDB_CONTROL_ENABLE_SEQNUM:
 309                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 310                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 311
 312         case CTDB_CONTROL_UPDATE_SEQNUM:
 313                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 314                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 315
 316         case CTDB_CONTROL_FREEZE:
 317                 CHECK_CONTROL_DATA_SIZE(0);
 318                 return ctdb_control_freeze(ctdb, c, async_reply);
 319
 320         case CTDB_CONTROL_THAW:
 321                 CHECK_CONTROL_DATA_SIZE(0);
 322                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid, true);
 323
 324         case CTDB_CONTROL_SET_RECMODE:
 325                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 326                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 327
 328         case CTDB_CONTROL_GET_MONMODE:
 329                 CHECK_CONTROL_DATA_SIZE(0);
 330                 return ctdb_monitoring_mode(ctdb);
 331
 332         case CTDB_CONTROL_ENABLE_MONITOR:
 333                 CHECK_CONTROL_DATA_SIZE(0);
 334                 ctdb_enable_monitoring(ctdb);
 335                 return 0;
 336
 337         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 338                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 339
 340         case CTDB_CONTROL_DISABLE_MONITOR:
 341                 CHECK_CONTROL_DATA_SIZE(0);
 342                 ctdb_disable_monitoring(ctdb);
 343                 return 0;
 344
 345         case CTDB_CONTROL_SHUTDOWN:
 346                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command.\n"));
 347                 ctdb_shutdown_sequence(ctdb, 0);
 348                 /* In case above returns due to duplicate shutdown */
 349                 return 0;
 350
 351         case CTDB_CONTROL_TAKEOVER_IPv4:
 352                 return control_not_implemented("TAKEOVER_IPv4", "TAKEOVER_IP");
 353
 354         case CTDB_CONTROL_TAKEOVER_IP:
 355                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 356                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 357
 358         case CTDB_CONTROL_RELEASE_IPv4:
 359                 return control_not_implemented("RELEASE_IPv4", "RELEASE_IP");
 360
 361         case CTDB_CONTROL_RELEASE_IP:
 362                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 363                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 364
 365         case CTDB_CONTROL_IPREALLOCATED:
 366                 CHECK_CONTROL_DATA_SIZE(0);
 367                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 368
 369         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 370                 return control_not_implemented("GET_PUBLIC_IPSv4",
 371                                                "GET_PUBLIC_IPS");
 372
 373         case CTDB_CONTROL_GET_PUBLIC_IPS:
 374                 CHECK_CONTROL_DATA_SIZE(0);
 375                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 376
 377         case CTDB_CONTROL_TCP_CLIENT:
 378                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 379                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 380
 381         case CTDB_CONTROL_STARTUP:
 382                 CHECK_CONTROL_DATA_SIZE(0);
 383                 return ctdb_control_startup(ctdb, srcnode);
 384
 385         case CTDB_CONTROL_TCP_ADD:
 386                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 387                 return ctdb_control_tcp_add(ctdb, indata, false);
 388
 389         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 390                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 391                 return ctdb_control_tcp_add(ctdb, indata, true);
 392
 393         case CTDB_CONTROL_TCP_REMOVE:
 394                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_connection));
 395                 return ctdb_control_tcp_remove(ctdb, indata);
 396
 397         case CTDB_CONTROL_SET_TUNABLE:
 398                 return ctdb_control_set_tunable(ctdb, indata);
 399
 400         case CTDB_CONTROL_GET_TUNABLE:
 401                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 402
 403         case CTDB_CONTROL_LIST_TUNABLES:
 404                 return ctdb_control_list_tunables(ctdb, outdata);
 405
 406         case CTDB_CONTROL_MODIFY_FLAGS:
 407                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 408                 return ctdb_control_modflags(ctdb, indata);
 409
 410         case CTDB_CONTROL_KILL_TCP:
 411                 return control_not_implemented("KILL_TCP", NULL);
 412
 413         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 414                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 415                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 416
 417         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 418                 /* data size is verified in the called function */
 419                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 420
 421         case CTDB_CONTROL_REGISTER_SERVER_ID:
 422                 return control_not_implemented("REGISTER_SERVER_ID", NULL);
 423
 424         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 425                 return control_not_implemented("UNREGISTER_SERVER_ID", NULL);
 426
 427         case CTDB_CONTROL_CHECK_SERVER_ID:
 428                 return control_not_implemented("CHECK_SERVER_ID", NULL);
 429
 430         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 431                 return control_not_implemented("SERVER_ID_LIST", NULL);
 432
 433         case CTDB_CONTROL_PERSISTENT_STORE:
 434                 return control_not_implemented("PERSISTENT_STORE", NULL);
 435
 436         case CTDB_CONTROL_UPDATE_RECORD:
 437                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 438
 439         case CTDB_CONTROL_SEND_GRATUITOUS_ARP:
 440                 return ctdb_control_send_gratious_arp(ctdb, indata);
 441
 442         case CTDB_CONTROL_TRANSACTION_START:
 443                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 444                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 445
 446         case CTDB_CONTROL_TRANSACTION_COMMIT:
 447                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 448                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 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, c, indata,
 471                                                        async_reply);
 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 control_not_implemented("TRANS2_COMMIT", "TRANS3_COMMIT");
 485
 486         case CTDB_CONTROL_TRANS2_ERROR:
 487                 return control_not_implemented("TRANS2_ERROR", NULL);
 488
 489         case CTDB_CONTROL_TRANS2_FINISHED:
 490                 return control_not_implemented("TRANS2_FINISHED", NULL);
 491
 492         case CTDB_CONTROL_TRANS2_ACTIVE:
 493                 return control_not_implemented("TRANS2_ACTIVE", NULL);
 494
 495         case CTDB_CONTROL_TRANS3_COMMIT:
 496                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 497
 498         case CTDB_CONTROL_RECD_PING:
 499                 CHECK_CONTROL_DATA_SIZE(0);
 500                 return ctdb_control_recd_ping(ctdb);
 501
 502         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 503                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 504                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 505
 506         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 507                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 508                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 509                 return 0;
 510         case CTDB_CONTROL_GET_RECLOCK_FILE:
 511                 CHECK_CONTROL_DATA_SIZE(0);
 512                 if (ctdb->recovery_lock_file != NULL) {
 513                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 514                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 515                 }
 516                 return 0;
 517         case CTDB_CONTROL_SET_RECLOCK_FILE: {
 518                 char *t;
 519
 520                 if (indata.dsize == 0) {
 521                         TALLOC_FREE(ctdb->recovery_lock_file);
 522                         return 0;
 523                 }
 524
 525                 /* Return silent success if unchanged.  Recovery
 526                  * master updates all nodes on each recovery - we
 527                  * don't need the extra memory allocation or log
 528                  * message each time. */
 529                 if (ctdb->recovery_lock_file != NULL &&
 530                     strcmp(discard_const(indata.dptr),
 531                            ctdb->recovery_lock_file) == 0) {
 532                         return 0;
 533                 }
 534
 535                 t = talloc_strdup(ctdb, discard_const(indata.dptr));
 536                 if (t == NULL) {
 537                         DEBUG(DEBUG_ERR, ("Out of memory in SET_RECLOCK_FILE\n"));
 538                         return -1;
 539                 }
 540
 541                 talloc_free(ctdb->recovery_lock_file);
 542                 ctdb->recovery_lock_file = t;
 543                 DEBUG(DEBUG_NOTICE, ("Updated recovery lock file to %s\n", t));
 544
 545                 return 0;
 546         }
 547
 548         case CTDB_CONTROL_STOP_NODE:
 549                 CHECK_CONTROL_DATA_SIZE(0);
 550                 return ctdb_control_stop_node(ctdb);
 551
 552         case CTDB_CONTROL_CONTINUE_NODE:
 553                 CHECK_CONTROL_DATA_SIZE(0);
 554                 return ctdb_control_continue_node(ctdb);
 555
 556         case CTDB_CONTROL_SET_NATGWSTATE:
 557                 return control_not_implemented("SET_NATGWSTATE", NULL);
 558
 559         case CTDB_CONTROL_SET_LMASTERROLE: {
 560                 uint32_t lmasterrole;
 561
 562                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 563                 lmasterrole = *(uint32_t *)indata.dptr;
 564                 if (lmasterrole == 0) {
 565                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 566                 } else {
 567                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 568                 }
 569                 return 0;
 570         }
 571
 572         case CTDB_CONTROL_SET_RECMASTERROLE: {
 573                 uint32_t recmasterrole;
 574
 575                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 576                 recmasterrole = *(uint32_t *)indata.dptr;
 577                 if (recmasterrole == 0) {
 578                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 579                 } else {
 580                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 581                 }
 582                 return 0;
 583         }
 584
 585         case CTDB_CONTROL_ENABLE_SCRIPT:
 586                 return ctdb_control_enable_script(ctdb, indata);
 587
 588         case CTDB_CONTROL_DISABLE_SCRIPT:
 589                 return ctdb_control_disable_script(ctdb, indata);
 590
 591         case CTDB_CONTROL_SET_BAN_STATE:
 592                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_state));
 593                 return ctdb_control_set_ban_state(ctdb, indata);
 594
 595         case CTDB_CONTROL_GET_BAN_STATE:
 596                 CHECK_CONTROL_DATA_SIZE(0);
 597                 return ctdb_control_get_ban_state(ctdb, outdata);
 598
 599         case CTDB_CONTROL_SET_DB_PRIORITY:
 600                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 601                 return ctdb_control_set_db_priority(ctdb, indata, client_id);
 602
 603         case CTDB_CONTROL_GET_DB_PRIORITY: {
 604                 uint32_t db_id;
 605                 struct ctdb_db_context *ctdb_db;
 606
 607                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 608                 db_id = *(uint32_t *)indata.dptr;
 609                 ctdb_db = find_ctdb_db(ctdb, db_id);
 610                 if (ctdb_db == NULL) return -1;
 611                 return ctdb_db->priority;
 612         }
 613
 614         case CTDB_CONTROL_TRANSACTION_CANCEL:
 615                 CHECK_CONTROL_DATA_SIZE(0);
 616                 return ctdb_control_transaction_cancel(ctdb);
 617
 618         case CTDB_CONTROL_REGISTER_NOTIFY:
 619                 return ctdb_control_register_notify(ctdb, client_id, indata);
 620
 621         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 622                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 623                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 624
 625         case CTDB_CONTROL_GET_LOG:
 626                 return control_not_implemented("GET_LOG", NULL);
 627
 628         case CTDB_CONTROL_CLEAR_LOG:
 629                 return control_not_implemented("CLEAR_LOG", NULL);
 630
 631         case CTDB_CONTROL_GET_DB_SEQNUM:
 632                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 633                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 634
 635         case CTDB_CONTROL_DB_SET_HEALTHY:
 636                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 637                 return ctdb_control_db_set_healthy(ctdb, indata);
 638
 639         case CTDB_CONTROL_DB_GET_HEALTH:
 640                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 641                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 642
 643         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 644                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 645                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 646
 647         case CTDB_CONTROL_GET_IFACES:
 648                 CHECK_CONTROL_DATA_SIZE(0);
 649                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 650
 651         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 652                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_iface));
 653                 return ctdb_control_set_iface_link(ctdb, c, indata);
 654
 655         case CTDB_CONTROL_GET_STAT_HISTORY:
 656                 CHECK_CONTROL_DATA_SIZE(0);
 657                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 658
 659         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 660                 struct ctdb_control_schedule_for_deletion *d;
 661                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 662                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 663                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 664                 size += d->keylen;
 665                 CHECK_CONTROL_DATA_SIZE(size);
 666                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 667         }
 668         case CTDB_CONTROL_GET_DB_STATISTICS:
 669                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 670                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 671
 672         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 673                 CHECK_CONTROL_DATA_SIZE(0);
 674                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 675
 676         case CTDB_CONTROL_RECEIVE_RECORDS:
 677                 return ctdb_control_receive_records(ctdb, indata, outdata);
 678
 679         case CTDB_CONTROL_DB_DETACH:
 680                 return ctdb_control_db_detach(ctdb, indata, client_id);
 681
 682         case CTDB_CONTROL_DB_FREEZE:
 683                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 684                 return ctdb_control_db_freeze(ctdb, c, *(uint32_t *)indata.dptr,
 685                                               async_reply);
 686
 687         case CTDB_CONTROL_DB_THAW:
 688                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 689                 return ctdb_control_db_thaw(ctdb, *(uint32_t *)indata.dptr);
 690
 691         case CTDB_CONTROL_DB_TRANSACTION_START:
 692                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 693                 return ctdb_control_db_transaction_start(ctdb, indata);
 694
 695         case CTDB_CONTROL_DB_TRANSACTION_COMMIT:
 696                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_transdb));
 697                 return ctdb_control_db_transaction_commit(ctdb, indata);
 698
 699         case CTDB_CONTROL_DB_TRANSACTION_CANCEL:
 700                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 701                 return ctdb_control_db_transaction_cancel(ctdb, indata);
 702
 703         case CTDB_CONTROL_DB_PULL:
 704                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 705                 return ctdb_control_db_pull(ctdb, c, indata, outdata);
 706
 707         case CTDB_CONTROL_DB_PUSH_START:
 708                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_pulldb_ext));
 709                 return ctdb_control_db_push_start(ctdb, indata);
 710
 711         case CTDB_CONTROL_DB_PUSH_CONFIRM:
 712                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 713                 return ctdb_control_db_push_confirm(ctdb, indata, outdata);
 714
 715         default:
 716                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 717                 return -1;
 718         }
 719 }
 720
 721 /*
 722   send a reply for a ctdb control
 723  */
 724 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control_old *c,
 725                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 726 {
 727         struct ctdb_reply_control_old *r;
 728         size_t len;
 729
 730         /* some controls send no reply */
 731         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 732                 return;
 733         }
 734
 735         len = offsetof(struct ctdb_reply_control_old, data) + (outdata?outdata->dsize:0);
 736         if (errormsg) {
 737                 len += strlen(errormsg);
 738         }
 739         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control_old);
 740         if (r == NULL) {
 741                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 742                 return;
 743         }
 744
 745         r->hdr.destnode     = c->hdr.srcnode;
 746         r->hdr.reqid        = c->hdr.reqid;
 747         r->status           = status;
 748         r->datalen          = outdata?outdata->dsize:0;
 749         if (outdata && outdata->dsize) {
 750                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 751         }
 752         if (errormsg) {
 753                 r->errorlen = strlen(errormsg);
 754                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 755         }
 756
 757         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 758
 759         talloc_free(r);
 760 }
 761
 762 /*
 763   called when a CTDB_REQ_CONTROL packet comes in
 764 */
 765 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 766 {
 767         struct ctdb_req_control_old *c = (struct ctdb_req_control_old *)hdr;
 768         TDB_DATA data, *outdata;
 769         int32_t status;
 770         bool async_reply = false;
 771         const char *errormsg = NULL;
 772
 773         data.dptr = &c->data[0];
 774         data.dsize = c->datalen;
 775
 776         outdata = talloc_zero(c, TDB_DATA);
 777
 778         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 779                                        &errormsg, &async_reply);
 780
 781         if (!async_reply) {
 782                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 783         }
 784 }
 785
 786 /*
 787   called when a CTDB_REPLY_CONTROL packet comes in
 788 */
 789 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 790 {
 791         struct ctdb_reply_control_old *c = (struct ctdb_reply_control_old *)hdr;
 792         TDB_DATA data;
 793         struct ctdb_control_state *state;
 794         const char *errormsg = NULL;
 795
 796         state = reqid_find(ctdb->idr, hdr->reqid, struct ctdb_control_state);
 797         if (state == NULL) {
 798                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 799                          ctdb->pnn, hdr->reqid));
 800                 return;
 801         }
 802
 803         if (hdr->reqid != state->reqid) {
 804                 /* we found a record  but it was the wrong one */
 805                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 806                 return;
 807         }
 808
 809         data.dptr = &c->data[0];
 810         data.dsize = c->datalen;
 811         if (c->errorlen) {
 812                 errormsg = talloc_strndup(state,
 813                                           (char *)&c->data[c->datalen], c->errorlen);
 814         }
 815
 816         /* make state a child of the packet, so it goes away when the packet
 817            is freed. */
 818         talloc_steal(hdr, state);
 819
 820         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 821 }
 822
 823 static int ctdb_control_destructor(struct ctdb_control_state *state)
 824 {
 825         reqid_remove(state->ctdb->idr, state->reqid);
 826         return 0;
 827 }
 828
 829 /*
 830   handle a timeout of a control
 831  */
 832 static void ctdb_control_timeout(struct tevent_context *ev,
 833                                  struct tevent_timer *te,
 834                                  struct timeval t, void *private_data)
 835 {
 836         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 837         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 838
 839         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 840
 841         talloc_steal(tmp_ctx, state);
 842
 843         state->callback(state->ctdb, -1, tdb_null,
 844                         "ctdb_control timed out",
 845                         state->private_data);
 846         talloc_free(tmp_ctx);
 847 }
 848
 849
 850 /*
 851   send a control message to a node
 852  */
 853 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 854                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 855                              uint32_t flags,
 856                              TDB_DATA data,
 857                              ctdb_control_callback_fn_t callback,
 858                              void *private_data)
 859 {
 860         struct ctdb_req_control_old *c;
 861         struct ctdb_control_state *state;
 862         size_t len;
 863
 864         if (ctdb->methods == NULL) {
 865                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 866                 return -1;
 867         }
 868
 869         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 870              (destnode == CTDB_BROADCAST_ALL) ||
 871              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 872             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 873                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 874                 return -1;
 875         }
 876
 877         if (destnode != CTDB_BROADCAST_VNNMAP &&
 878             destnode != CTDB_BROADCAST_ALL &&
 879             destnode != CTDB_BROADCAST_CONNECTED &&
 880             (!ctdb_validate_pnn(ctdb, destnode) ||
 881              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 882                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 883                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 884                 }
 885                 return 0;
 886         }
 887
 888         /* the state is made a child of private_data if possible. This means any reply
 889            will be discarded if the private_data goes away */
 890         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 891         CTDB_NO_MEMORY(ctdb, state);
 892
 893         state->reqid = reqid_new(ctdb->idr, state);
 894         state->callback = callback;
 895         state->private_data = private_data;
 896         state->ctdb = ctdb;
 897         state->flags = flags;
 898
 899         talloc_set_destructor(state, ctdb_control_destructor);
 900
 901         len = offsetof(struct ctdb_req_control_old, data) + data.dsize;
 902         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 903                                     struct ctdb_req_control_old);
 904         CTDB_NO_MEMORY(ctdb, c);
 905         talloc_set_name_const(c, "ctdb_req_control packet");
 906
 907         c->hdr.destnode     = destnode;
 908         c->hdr.reqid        = state->reqid;
 909         c->opcode           = opcode;
 910         c->client_id        = client_id;
 911         c->flags            = flags;
 912         c->srvid            = srvid;
 913         c->datalen          = data.dsize;
 914         if (data.dsize) {
 915                 memcpy(&c->data[0], data.dptr, data.dsize);
 916         }
 917
 918         ctdb_queue_packet(ctdb, &c->hdr);
 919
 920         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 921                 talloc_free(state);
 922                 return 0;
 923         }
 924
 925         if (ctdb->tunable.control_timeout) {
 926                 tevent_add_timer(ctdb->ev, state,
 927                                  timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 928                                  ctdb_control_timeout, state);
 929         }
 930
 931         talloc_free(c);
 932         return 0;
 933 }