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 "includes.h"
  20 #include "tdb.h"
  21 #include "system/network.h"
  22 #include "system/filesys.h"
  23 #include "system/wait.h"
  24 #include "../include/ctdb_private.h"
  25 #include "lib/util/dlinklist.h"
  26 #include "lib/tdb_wrap/tdb_wrap.h"
  27 #include "lib/util/talloc_report.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         char *report;
  45         size_t reportlen;
  46
  47         report = talloc_report_str(outdata, NULL);
  48         if (report == NULL) {
  49                 DEBUG(DEBUG_ERR,
  50                       (__location__ " talloc_report_str failed\n"));
  51                 return -1;
  52         }
  53         reportlen = talloc_get_size(report);
  54
  55         if (reportlen > 0) {
  56                 reportlen -= 1; /* strip trailing zero */
  57         }
  58
  59         outdata->dptr = (uint8_t *)report;
  60         outdata->dsize = reportlen;
  61         return 0;
  62 }
  63
  64 static int32_t control_not_implemented(const char *unsupported,
  65                                        const char *alternate)
  66 {
  67         if (alternate == NULL) {
  68                 DEBUG(DEBUG_ERR,
  69                       ("Control %s is not implemented any more\n",
  70                        unsupported));
  71         } else {
  72                 DEBUG(DEBUG_ERR,
  73                       ("Control %s is not implemented any more, use %s instead\n",
  74                        unsupported, alternate));
  75         }
  76         return -1;
  77 }
  78
  79 /*
  80   process a control request
  81  */
  82 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  83                                      struct ctdb_req_control *c,
  84                                      TDB_DATA indata,
  85                                      TDB_DATA *outdata, uint32_t srcnode,
  86                                      const char **errormsg,
  87                                      bool *async_reply)
  88 {
  89         uint32_t opcode = c->opcode;
  90         uint64_t srvid = c->srvid;
  91         uint32_t client_id = c->client_id;
  92
  93         switch (opcode) {
  94         case CTDB_CONTROL_PROCESS_EXISTS: {
  95                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  96                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  97         }
  98
  99         case CTDB_CONTROL_SET_DEBUG: {
 100                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
 101                 DEBUGLEVEL = *(int32_t *)indata.dptr;
 102                 return 0;
 103         }
 104
 105         case CTDB_CONTROL_GET_DEBUG: {
 106                 CHECK_CONTROL_DATA_SIZE(0);
 107                 outdata->dptr = (uint8_t *)&(DEBUGLEVEL);
 108                 outdata->dsize = sizeof(DEBUGLEVEL);
 109                 return 0;
 110         }
 111
 112         case CTDB_CONTROL_STATISTICS: {
 113                 int i;
 114                 CHECK_CONTROL_DATA_SIZE(0);
 115                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 116                 ctdb->statistics.num_clients = ctdb->num_clients;
 117                 ctdb->statistics.frozen = 0;
 118                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 119                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 120                                 ctdb->statistics.frozen = 1;
 121                         }
 122                 }
 123                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 124                 ctdb->statistics.statistics_current_time = timeval_current();
 125
 126                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 127                 outdata->dsize = sizeof(ctdb->statistics);
 128                 return 0;
 129         }
 130
 131         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 132                 CHECK_CONTROL_DATA_SIZE(0);
 133                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 134                 outdata->dsize = sizeof(ctdb->tunable);
 135                 return 0;
 136         }
 137
 138         case CTDB_CONTROL_DUMP_MEMORY: {
 139                 CHECK_CONTROL_DATA_SIZE(0);
 140                 return ctdb_dump_memory(ctdb, outdata);
 141         }
 142
 143         case CTDB_CONTROL_STATISTICS_RESET: {
 144                 struct ctdb_db_context *ctdb_db;
 145
 146                 CHECK_CONTROL_DATA_SIZE(0);
 147                 ZERO_STRUCT(ctdb->statistics);
 148                 for (ctdb_db = ctdb->db_list;
 149                      ctdb_db != NULL;
 150                      ctdb_db = ctdb_db->next) {
 151                         ctdb_db_statistics_reset(ctdb_db);
 152                 }
 153                 ctdb->statistics.statistics_start_time = timeval_current();
 154                 return 0;
 155         }
 156
 157         case CTDB_CONTROL_GETVNNMAP:
 158                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 159
 160         case CTDB_CONTROL_GET_DBMAP:
 161                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 162
 163         case CTDB_CONTROL_GET_NODEMAPv4:
 164                 return control_not_implemented("GET_NODEMAPv4", "GET_NODEMAP");
 165
 166         case CTDB_CONTROL_GET_NODEMAP:
 167                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 168
 169         case CTDB_CONTROL_GET_NODES_FILE:
 170                 return ctdb_control_getnodesfile(ctdb, opcode, indata, outdata);
 171
 172         case CTDB_CONTROL_RELOAD_NODES_FILE:
 173                 CHECK_CONTROL_DATA_SIZE(0);
 174                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 175
 176         case CTDB_CONTROL_SET_DB_STICKY: {
 177                 uint32_t db_id;
 178                 struct ctdb_db_context *ctdb_db;
 179
 180                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 181                 db_id = *(uint32_t *)indata.dptr;
 182                 ctdb_db = find_ctdb_db(ctdb, db_id);
 183                 if (ctdb_db == NULL) return -1;
 184                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 185         }
 186
 187         case CTDB_CONTROL_SETVNNMAP:
 188                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 189
 190         case CTDB_CONTROL_PULL_DB:
 191                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 192                 return ctdb_control_pull_db(ctdb, indata, outdata);
 193
 194         case CTDB_CONTROL_SET_DMASTER:
 195                 return control_not_implemented("SET_DMASTER", NULL);
 196
 197         case CTDB_CONTROL_PUSH_DB:
 198                 return ctdb_control_push_db(ctdb, indata);
 199
 200         case CTDB_CONTROL_GET_RECMODE: {
 201                 return ctdb->recovery_mode;
 202         }
 203
 204         case CTDB_CONTROL_SET_RECMASTER: {
 205                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 206         }
 207
 208         case CTDB_CONTROL_GET_RECMASTER:
 209                 return ctdb->recovery_master;
 210
 211         case CTDB_CONTROL_GET_PID:
 212                 return getpid();
 213
 214         case CTDB_CONTROL_GET_PNN:
 215                 return ctdb->pnn;
 216
 217         case CTDB_CONTROL_PING:
 218                 CHECK_CONTROL_DATA_SIZE(0);
 219                 return ctdb->num_clients;
 220
 221         case CTDB_CONTROL_GET_RUNSTATE:
 222                 CHECK_CONTROL_DATA_SIZE(0);
 223                 outdata->dptr = (uint8_t *)&ctdb->runstate;
 224                 outdata->dsize = sizeof(uint32_t);
 225                 return 0;
 226
 227
 228         case CTDB_CONTROL_SET_DB_READONLY: {
 229                 uint32_t db_id;
 230                 struct ctdb_db_context *ctdb_db;
 231
 232                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 233                 db_id = *(uint32_t *)indata.dptr;
 234                 ctdb_db = find_ctdb_db(ctdb, db_id);
 235                 if (ctdb_db == NULL) return -1;
 236                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 237         }
 238         case CTDB_CONTROL_GET_DBNAME: {
 239                 uint32_t db_id;
 240                 struct ctdb_db_context *ctdb_db;
 241
 242                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 243                 db_id = *(uint32_t *)indata.dptr;
 244                 ctdb_db = find_ctdb_db(ctdb, db_id);
 245                 if (ctdb_db == NULL) return -1;
 246                 outdata->dptr = discard_const(ctdb_db->db_name);
 247                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 248                 return 0;
 249         }
 250
 251         case CTDB_CONTROL_GETDBPATH: {
 252                 uint32_t db_id;
 253                 struct ctdb_db_context *ctdb_db;
 254
 255                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 256                 db_id = *(uint32_t *)indata.dptr;
 257                 ctdb_db = find_ctdb_db(ctdb, db_id);
 258                 if (ctdb_db == NULL) return -1;
 259                 outdata->dptr = discard_const(ctdb_db->db_path);
 260                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 261                 return 0;
 262         }
 263
 264         case CTDB_CONTROL_DB_ATTACH:
 265           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 266
 267         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 268           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 269
 270         case CTDB_CONTROL_SET_CALL:
 271                 return control_not_implemented("SET_CALL", NULL);
 272
 273         case CTDB_CONTROL_TRAVERSE_START:
 274                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 275                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 276
 277         case CTDB_CONTROL_TRAVERSE_START_EXT:
 278                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 279                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 280
 281         case CTDB_CONTROL_TRAVERSE_ALL:
 282                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 283
 284         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 285                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 286
 287         case CTDB_CONTROL_TRAVERSE_DATA:
 288                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 289
 290         case CTDB_CONTROL_TRAVERSE_KILL:
 291                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 292                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 293
 294         case CTDB_CONTROL_REGISTER_SRVID:
 295                 return daemon_register_message_handler(ctdb, client_id, srvid);
 296
 297         case CTDB_CONTROL_DEREGISTER_SRVID:
 298                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 299
 300         case CTDB_CONTROL_CHECK_SRVIDS:
 301                 return daemon_check_srvids(ctdb, indata, outdata);
 302
 303         case CTDB_CONTROL_ENABLE_SEQNUM:
 304                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 305                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 306
 307         case CTDB_CONTROL_UPDATE_SEQNUM:
 308                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 309                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 310
 311         case CTDB_CONTROL_FREEZE:
 312                 CHECK_CONTROL_DATA_SIZE(0);
 313                 return ctdb_control_freeze(ctdb, c, async_reply);
 314
 315         case CTDB_CONTROL_THAW:
 316                 CHECK_CONTROL_DATA_SIZE(0);
 317                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid, true);
 318
 319         case CTDB_CONTROL_SET_RECMODE:
 320                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 321                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 322
 323         case CTDB_CONTROL_GET_MONMODE:
 324                 CHECK_CONTROL_DATA_SIZE(0);
 325                 return ctdb_monitoring_mode(ctdb);
 326
 327         case CTDB_CONTROL_ENABLE_MONITOR:
 328                 CHECK_CONTROL_DATA_SIZE(0);
 329                 ctdb_enable_monitoring(ctdb);
 330                 return 0;
 331
 332         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 333                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 334
 335         case CTDB_CONTROL_DISABLE_MONITOR:
 336                 CHECK_CONTROL_DATA_SIZE(0);
 337                 ctdb_disable_monitoring(ctdb);
 338                 return 0;
 339
 340         case CTDB_CONTROL_SHUTDOWN:
 341                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command.\n"));
 342                 ctdb_shutdown_sequence(ctdb, 0);
 343                 /* In case above returns due to duplicate shutdown */
 344                 return 0;
 345
 346         case CTDB_CONTROL_TAKEOVER_IPv4:
 347                 return control_not_implemented("TAKEOVER_IPv4", "TAKEOVER_IP");
 348
 349         case CTDB_CONTROL_TAKEOVER_IP:
 350                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 351                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 352
 353         case CTDB_CONTROL_RELEASE_IPv4:
 354                 return control_not_implemented("RELEASE_IPv4", "RELEASE_IP");
 355
 356         case CTDB_CONTROL_RELEASE_IP:
 357                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 358                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 359
 360         case CTDB_CONTROL_IPREALLOCATED:
 361                 CHECK_CONTROL_DATA_SIZE(0);
 362                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 363
 364         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 365                 return control_not_implemented("GET_PUBLIC_IPSv4",
 366                                                "GET_PUBLIC_IPS");
 367
 368         case CTDB_CONTROL_GET_PUBLIC_IPS:
 369                 CHECK_CONTROL_DATA_SIZE(0);
 370                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 371
 372         case CTDB_CONTROL_TCP_CLIENT:
 373                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp_addr));
 374                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 375
 376         case CTDB_CONTROL_STARTUP:
 377                 CHECK_CONTROL_DATA_SIZE(0);
 378                 return ctdb_control_startup(ctdb, srcnode);
 379
 380         case CTDB_CONTROL_TCP_ADD:
 381                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 382                 return ctdb_control_tcp_add(ctdb, indata, false);
 383
 384         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 385                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 386                 return ctdb_control_tcp_add(ctdb, indata, true);
 387
 388         case CTDB_CONTROL_TCP_REMOVE:
 389                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 390                 return ctdb_control_tcp_remove(ctdb, indata);
 391
 392         case CTDB_CONTROL_SET_TUNABLE:
 393                 return ctdb_control_set_tunable(ctdb, indata);
 394
 395         case CTDB_CONTROL_GET_TUNABLE:
 396                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 397
 398         case CTDB_CONTROL_LIST_TUNABLES:
 399                 return ctdb_control_list_tunables(ctdb, outdata);
 400
 401         case CTDB_CONTROL_MODIFY_FLAGS:
 402                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 403                 return ctdb_control_modflags(ctdb, indata);
 404
 405         case CTDB_CONTROL_KILL_TCP:
 406                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 407                 return ctdb_control_kill_tcp(ctdb, indata);
 408
 409         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 410                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 411                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 412
 413         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 414                 /* data size is verified in the called function */
 415                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 416
 417         case CTDB_CONTROL_REGISTER_SERVER_ID:
 418                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 419                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 420
 421         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 422                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 423                 return ctdb_control_unregister_server_id(ctdb, indata);
 424
 425         case CTDB_CONTROL_CHECK_SERVER_ID:
 426                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 427                 return ctdb_control_check_server_id(ctdb, indata);
 428
 429         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 430                 CHECK_CONTROL_DATA_SIZE(0);
 431                 return ctdb_control_get_server_id_list(ctdb, outdata);
 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_GRATIOUS_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_control_wipe_database));
 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                 uint32_t natgwstate;
 558
 559                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 560                 natgwstate = *(uint32_t *)indata.dptr;
 561                 if (natgwstate == 0) {
 562                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 563                 } else {
 564                         ctdb->capabilities |= CTDB_CAP_NATGW;
 565                 }
 566                 return 0;
 567         }
 568
 569         case CTDB_CONTROL_SET_LMASTERROLE: {
 570                 uint32_t lmasterrole;
 571
 572                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 573                 lmasterrole = *(uint32_t *)indata.dptr;
 574                 if (lmasterrole == 0) {
 575                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 576                 } else {
 577                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 578                 }
 579                 return 0;
 580         }
 581
 582         case CTDB_CONTROL_SET_RECMASTERROLE: {
 583                 uint32_t recmasterrole;
 584
 585                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 586                 recmasterrole = *(uint32_t *)indata.dptr;
 587                 if (recmasterrole == 0) {
 588                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 589                 } else {
 590                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 591                 }
 592                 return 0;
 593         }
 594
 595         case CTDB_CONTROL_ENABLE_SCRIPT:
 596                 return ctdb_control_enable_script(ctdb, indata);
 597
 598         case CTDB_CONTROL_DISABLE_SCRIPT:
 599                 return ctdb_control_disable_script(ctdb, indata);
 600
 601         case CTDB_CONTROL_SET_BAN_STATE:
 602                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 603                 return ctdb_control_set_ban_state(ctdb, indata);
 604
 605         case CTDB_CONTROL_GET_BAN_STATE:
 606                 CHECK_CONTROL_DATA_SIZE(0);
 607                 return ctdb_control_get_ban_state(ctdb, outdata);
 608
 609         case CTDB_CONTROL_SET_DB_PRIORITY:
 610                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 611                 return ctdb_control_set_db_priority(ctdb, indata, client_id);
 612
 613         case CTDB_CONTROL_GET_DB_PRIORITY: {
 614                 uint32_t db_id;
 615                 struct ctdb_db_context *ctdb_db;
 616
 617                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 618                 db_id = *(uint32_t *)indata.dptr;
 619                 ctdb_db = find_ctdb_db(ctdb, db_id);
 620                 if (ctdb_db == NULL) return -1;
 621                 return ctdb_db->priority;
 622         }
 623
 624         case CTDB_CONTROL_TRANSACTION_CANCEL:
 625                 CHECK_CONTROL_DATA_SIZE(0);
 626                 return ctdb_control_transaction_cancel(ctdb);
 627
 628         case CTDB_CONTROL_REGISTER_NOTIFY:
 629                 return ctdb_control_register_notify(ctdb, client_id, indata);
 630
 631         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 632                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 633                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 634
 635         case CTDB_CONTROL_GET_LOG:
 636                 return control_not_implemented("GET_LOG", NULL);
 637
 638         case CTDB_CONTROL_CLEAR_LOG:
 639                 return control_not_implemented("CLEAR_LOG", NULL);
 640
 641         case CTDB_CONTROL_GET_DB_SEQNUM:
 642                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 643                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 644
 645         case CTDB_CONTROL_DB_SET_HEALTHY:
 646                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 647                 return ctdb_control_db_set_healthy(ctdb, indata);
 648
 649         case CTDB_CONTROL_DB_GET_HEALTH:
 650                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 651                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 652
 653         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 654                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 655                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 656
 657         case CTDB_CONTROL_GET_IFACES:
 658                 CHECK_CONTROL_DATA_SIZE(0);
 659                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 660
 661         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 662                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 663                 return ctdb_control_set_iface_link(ctdb, c, indata);
 664
 665         case CTDB_CONTROL_GET_STAT_HISTORY:
 666                 CHECK_CONTROL_DATA_SIZE(0);
 667                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 668
 669         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 670                 struct ctdb_control_schedule_for_deletion *d;
 671                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 672                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 673                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 674                 size += d->keylen;
 675                 CHECK_CONTROL_DATA_SIZE(size);
 676                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 677         }
 678         case CTDB_CONTROL_GET_DB_STATISTICS:
 679                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 680                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 681
 682         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 683                 CHECK_CONTROL_DATA_SIZE(0);
 684                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 685
 686         case CTDB_CONTROL_RECEIVE_RECORDS:
 687                 return ctdb_control_receive_records(ctdb, indata, outdata);
 688
 689         case CTDB_CONTROL_DB_DETACH:
 690                 return ctdb_control_db_detach(ctdb, indata, client_id);
 691
 692         default:
 693                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 694                 return -1;
 695         }
 696 }
 697
 698 /*
 699   send a reply for a ctdb control
 700  */
 701 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 702                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 703 {
 704         struct ctdb_reply_control *r;
 705         size_t len;
 706
 707         /* some controls send no reply */
 708         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 709                 return;
 710         }
 711
 712         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 713         if (errormsg) {
 714                 len += strlen(errormsg);
 715         }
 716         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 717         if (r == NULL) {
 718                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 719                 return;
 720         }
 721
 722         r->hdr.destnode     = c->hdr.srcnode;
 723         r->hdr.reqid        = c->hdr.reqid;
 724         r->status           = status;
 725         r->datalen          = outdata?outdata->dsize:0;
 726         if (outdata && outdata->dsize) {
 727                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 728         }
 729         if (errormsg) {
 730                 r->errorlen = strlen(errormsg);
 731                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 732         }
 733
 734         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 735
 736         talloc_free(r);
 737 }
 738
 739 /*
 740   called when a CTDB_REQ_CONTROL packet comes in
 741 */
 742 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 743 {
 744         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 745         TDB_DATA data, *outdata;
 746         int32_t status;
 747         bool async_reply = false;
 748         const char *errormsg = NULL;
 749
 750         data.dptr = &c->data[0];
 751         data.dsize = c->datalen;
 752
 753         outdata = talloc_zero(c, TDB_DATA);
 754
 755         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 756                                        &errormsg, &async_reply);
 757
 758         if (!async_reply) {
 759                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 760         }
 761 }
 762
 763 /*
 764   called when a CTDB_REPLY_CONTROL packet comes in
 765 */
 766 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 767 {
 768         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 769         TDB_DATA data;
 770         struct ctdb_control_state *state;
 771         const char *errormsg = NULL;
 772
 773         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 774         if (state == NULL) {
 775                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 776                          ctdb->pnn, hdr->reqid));
 777                 return;
 778         }
 779
 780         if (hdr->reqid != state->reqid) {
 781                 /* we found a record  but it was the wrong one */
 782                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 783                 return;
 784         }
 785
 786         data.dptr = &c->data[0];
 787         data.dsize = c->datalen;
 788         if (c->errorlen) {
 789                 errormsg = talloc_strndup(state,
 790                                           (char *)&c->data[c->datalen], c->errorlen);
 791         }
 792
 793         /* make state a child of the packet, so it goes away when the packet
 794            is freed. */
 795         talloc_steal(hdr, state);
 796
 797         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 798 }
 799
 800 static int ctdb_control_destructor(struct ctdb_control_state *state)
 801 {
 802         ctdb_reqid_remove(state->ctdb, state->reqid);
 803         return 0;
 804 }
 805
 806 /*
 807   handle a timeout of a control
 808  */
 809 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 810                        struct timeval t, void *private_data)
 811 {
 812         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 813         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 814
 815         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 816
 817         talloc_steal(tmp_ctx, state);
 818
 819         state->callback(state->ctdb, -1, tdb_null,
 820                         "ctdb_control timed out",
 821                         state->private_data);
 822         talloc_free(tmp_ctx);
 823 }
 824
 825
 826 /*
 827   send a control message to a node
 828  */
 829 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 830                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 831                              uint32_t flags,
 832                              TDB_DATA data,
 833                              ctdb_control_callback_fn_t callback,
 834                              void *private_data)
 835 {
 836         struct ctdb_req_control *c;
 837         struct ctdb_control_state *state;
 838         size_t len;
 839
 840         if (ctdb->methods == NULL) {
 841                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 842                 return -1;
 843         }
 844
 845         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 846              (destnode == CTDB_BROADCAST_ALL) ||
 847              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 848             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 849                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 850                 return -1;
 851         }
 852
 853         if (destnode != CTDB_BROADCAST_VNNMAP &&
 854             destnode != CTDB_BROADCAST_ALL &&
 855             destnode != CTDB_BROADCAST_CONNECTED &&
 856             (!ctdb_validate_pnn(ctdb, destnode) ||
 857              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 858                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 859                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 860                 }
 861                 return 0;
 862         }
 863
 864         /* the state is made a child of private_data if possible. This means any reply
 865            will be discarded if the private_data goes away */
 866         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 867         CTDB_NO_MEMORY(ctdb, state);
 868
 869         state->reqid = ctdb_reqid_new(ctdb, state);
 870         state->callback = callback;
 871         state->private_data = private_data;
 872         state->ctdb = ctdb;
 873         state->flags = flags;
 874
 875         talloc_set_destructor(state, ctdb_control_destructor);
 876
 877         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 878         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 879                                     struct ctdb_req_control);
 880         CTDB_NO_MEMORY(ctdb, c);
 881         talloc_set_name_const(c, "ctdb_req_control packet");
 882
 883         c->hdr.destnode     = destnode;
 884         c->hdr.reqid        = state->reqid;
 885         c->opcode           = opcode;
 886         c->client_id        = client_id;
 887         c->flags            = flags;
 888         c->srvid            = srvid;
 889         c->datalen          = data.dsize;
 890         if (data.dsize) {
 891                 memcpy(&c->data[0], data.dptr, data.dsize);
 892         }
 893
 894         ctdb_queue_packet(ctdb, &c->hdr);
 895
 896         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 897                 talloc_free(state);
 898                 return 0;
 899         }
 900
 901         if (ctdb->tunable.control_timeout) {
 902                 event_add_timed(ctdb->ev, state,
 903                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 904                                 ctdb_control_timeout, state);
 905         }
 906
 907         talloc_free(c);
 908         return 0;
 909 }