server/ctdb_control.c

   1 /*
   2    ctdb_control protocol code
   3
   4    Copyright (C) Andrew Tridgell  2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "includes.h"
  20 #include "lib/tevent/tevent.h"
  21 #include "lib/tdb/include/tdb.h"
  22 #include "system/network.h"
  23 #include "system/filesys.h"
  24 #include "system/wait.h"
  25 #include "../include/ctdb_private.h"
  26 #include "lib/util/dlinklist.h"
  27 #include "db_wrap.h"
  28
  29
  30 struct ctdb_control_state {
  31         struct ctdb_context *ctdb;
  32         uint32_t reqid;
  33         ctdb_control_callback_fn_t callback;
  34         void *private_data;
  35         unsigned flags;
  36 };
  37
  38
  39 /*
  40   dump talloc memory hierarchy, returning it as a blob to the client
  41  */
  42 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  43 {
  44         /* dump to a file, then send the file as a blob */
  45         FILE *f;
  46         long fsize;
  47         f = tmpfile();
  48         if (f == NULL) {
  49                 DEBUG(DEBUG_ERR,(__location__ " Unable to open tmpfile - %s\n", strerror(errno)));
  50                 return -1;
  51         }
  52         talloc_report_full(NULL, f);
  53         fsize = ftell(f);
  54         rewind(f);
  55         outdata->dptr = talloc_size(outdata, fsize);
  56         CTDB_NO_MEMORY(ctdb, outdata->dptr);
  57         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  58         fclose(f);
  59         if (outdata->dsize != fsize) {
  60                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  61                 return -1;
  62         }
  63         return 0;
  64 }
  65
  66
  67 /*
  68   process a control request
  69  */
  70 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  71                                      struct ctdb_req_control *c,
  72                                      TDB_DATA indata,
  73                                      TDB_DATA *outdata, uint32_t srcnode,
  74                                      const char **errormsg,
  75                                      bool *async_reply)
  76 {
  77         uint32_t opcode = c->opcode;
  78         uint64_t srvid = c->srvid;
  79         uint32_t client_id = c->client_id;
  80
  81         switch (opcode) {
  82         case CTDB_CONTROL_PROCESS_EXISTS: {
  83                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  84                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  85         }
  86
  87         case CTDB_CONTROL_SET_DEBUG: {
  88                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
  89                 LogLevel = *(int32_t *)indata.dptr;
  90                 return 0;
  91         }
  92
  93         case CTDB_CONTROL_GET_DEBUG: {
  94                 CHECK_CONTROL_DATA_SIZE(0);
  95                 outdata->dptr = (uint8_t *)&LogLevel;
  96                 outdata->dsize = sizeof(LogLevel);
  97                 return 0;
  98         }
  99
 100         case CTDB_CONTROL_STATISTICS: {
 101                 int i;
 102                 CHECK_CONTROL_DATA_SIZE(0);
 103                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 104                 ctdb->statistics.frozen = 0;
 105                 for (i=1; i<= NUM_DB_PRIORITIES; i++) {
 106                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 107                                 ctdb->statistics.frozen = 1;
 108                         }
 109                 }
 110                 ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
 111                 ctdb->statistics.statistics_current_time = timeval_current();
 112
 113                 outdata->dptr = (uint8_t *)&ctdb->statistics;
 114                 outdata->dsize = sizeof(ctdb->statistics);
 115                 return 0;
 116         }
 117
 118         case CTDB_CONTROL_GET_ALL_TUNABLES: {
 119                 CHECK_CONTROL_DATA_SIZE(0);
 120                 outdata->dptr = (uint8_t *)&ctdb->tunable;
 121                 outdata->dsize = sizeof(ctdb->tunable);
 122                 return 0;
 123         }
 124
 125         case CTDB_CONTROL_DUMP_MEMORY: {
 126                 CHECK_CONTROL_DATA_SIZE(0);
 127                 return ctdb_dump_memory(ctdb, outdata);
 128         }
 129
 130         case CTDB_CONTROL_STATISTICS_RESET: {
 131                 CHECK_CONTROL_DATA_SIZE(0);
 132                 ZERO_STRUCT(ctdb->statistics);
 133                 ctdb->statistics.statistics_start_time = timeval_current();
 134                 return 0;
 135         }
 136
 137         case CTDB_CONTROL_GETVNNMAP:
 138                 return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
 139
 140         case CTDB_CONTROL_GET_DBMAP:
 141                 return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
 142
 143         case CTDB_CONTROL_GET_NODEMAPv4:
 144                 return ctdb_control_getnodemapv4(ctdb, opcode, indata, outdata);
 145
 146         case CTDB_CONTROL_GET_NODEMAP:
 147                 return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
 148
 149         case CTDB_CONTROL_RELOAD_NODES_FILE:
 150                 CHECK_CONTROL_DATA_SIZE(0);
 151                 return ctdb_control_reload_nodes_file(ctdb, opcode);
 152
 153         case CTDB_CONTROL_SETVNNMAP:
 154                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 155
 156         case CTDB_CONTROL_PULL_DB:
 157                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 158                 return ctdb_control_pull_db(ctdb, indata, outdata);
 159
 160         case CTDB_CONTROL_SET_DMASTER:
 161                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
 162                 return ctdb_control_set_dmaster(ctdb, indata);
 163
 164         case CTDB_CONTROL_PUSH_DB:
 165                 return ctdb_control_push_db(ctdb, indata);
 166
 167         case CTDB_CONTROL_GET_RECMODE: {
 168                 int i;
 169                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 170                         return CTDB_RECOVERY_ACTIVE;
 171                 }
 172                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 173                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 174                                 return CTDB_RECOVERY_ACTIVE;
 175                         }
 176                 }
 177                 return CTDB_RECOVERY_NORMAL;
 178         }
 179
 180         case CTDB_CONTROL_SET_RECMASTER: {
 181                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 182         }
 183
 184         case CTDB_CONTROL_GET_RECMASTER:
 185                 return ctdb->recovery_master;
 186
 187         case CTDB_CONTROL_GET_PID:
 188                 return getpid();
 189
 190         case CTDB_CONTROL_GET_PNN:
 191                 return ctdb->pnn;
 192
 193         case CTDB_CONTROL_PING:
 194                 CHECK_CONTROL_DATA_SIZE(0);
 195                 return ctdb->statistics.num_clients;
 196
 197         case CTDB_CONTROL_GET_DBNAME: {
 198                 uint32_t db_id;
 199                 struct ctdb_db_context *ctdb_db;
 200
 201                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 202                 db_id = *(uint32_t *)indata.dptr;
 203                 ctdb_db = find_ctdb_db(ctdb, db_id);
 204                 if (ctdb_db == NULL) return -1;
 205                 outdata->dptr = discard_const(ctdb_db->db_name);
 206                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 207                 return 0;
 208         }
 209
 210         case CTDB_CONTROL_GETDBPATH: {
 211                 uint32_t db_id;
 212                 struct ctdb_db_context *ctdb_db;
 213
 214                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 215                 db_id = *(uint32_t *)indata.dptr;
 216                 ctdb_db = find_ctdb_db(ctdb, db_id);
 217                 if (ctdb_db == NULL) return -1;
 218                 outdata->dptr = discard_const(ctdb_db->db_path);
 219                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 220                 return 0;
 221         }
 222
 223         case CTDB_CONTROL_DB_ATTACH:
 224           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 225
 226         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 227           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 228
 229         case CTDB_CONTROL_SET_CALL: {
 230                 struct ctdb_control_set_call *sc =
 231                         (struct ctdb_control_set_call *)indata.dptr;
 232                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 233                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 234         }
 235
 236         case CTDB_CONTROL_TRAVERSE_START:
 237                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 238                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 239
 240         case CTDB_CONTROL_TRAVERSE_ALL:
 241                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 242
 243         case CTDB_CONTROL_TRAVERSE_DATA:
 244                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 245
 246         case CTDB_CONTROL_TRAVERSE_KILL:
 247                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 248                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 249
 250         case CTDB_CONTROL_REGISTER_SRVID:
 251                 return daemon_register_message_handler(ctdb, client_id, srvid);
 252
 253         case CTDB_CONTROL_DEREGISTER_SRVID:
 254                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 255
 256         case CTDB_CONTROL_CHECK_SRVIDS:
 257                 return daemon_check_srvids(ctdb, indata, outdata);
 258
 259         case CTDB_CONTROL_ENABLE_SEQNUM:
 260                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 261                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 262
 263         case CTDB_CONTROL_UPDATE_SEQNUM:
 264                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 265                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 266
 267         case CTDB_CONTROL_FREEZE:
 268                 CHECK_CONTROL_DATA_SIZE(0);
 269                 return ctdb_control_freeze(ctdb, c, async_reply);
 270
 271         case CTDB_CONTROL_THAW:
 272                 CHECK_CONTROL_DATA_SIZE(0);
 273                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 274
 275         case CTDB_CONTROL_SET_RECMODE:
 276                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 277                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 278
 279         case CTDB_CONTROL_GET_MONMODE:
 280                 CHECK_CONTROL_DATA_SIZE(0);
 281                 return ctdb_monitoring_mode(ctdb);
 282
 283         case CTDB_CONTROL_ENABLE_MONITOR:
 284                 CHECK_CONTROL_DATA_SIZE(0);
 285                 ctdb_enable_monitoring(ctdb);
 286                 return 0;
 287
 288         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 289                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 290
 291         case CTDB_CONTROL_DISABLE_MONITOR:
 292                 CHECK_CONTROL_DATA_SIZE(0);
 293                 ctdb_disable_monitoring(ctdb);
 294                 return 0;
 295
 296         case CTDB_CONTROL_SHUTDOWN:
 297                 ctdb_stop_recoverd(ctdb);
 298                 ctdb_stop_keepalive(ctdb);
 299                 ctdb_stop_monitoring(ctdb);
 300                 ctdb_release_all_ips(ctdb);
 301                 if (ctdb->methods != NULL) {
 302                         ctdb->methods->shutdown(ctdb);
 303                 }
 304                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 305                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 306                 exit(0);
 307
 308         case CTDB_CONTROL_TAKEOVER_IPv4:
 309                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 310                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 311
 312         case CTDB_CONTROL_TAKEOVER_IP:
 313                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 314                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 315
 316         case CTDB_CONTROL_RELEASE_IPv4:
 317                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 318                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 319
 320         case CTDB_CONTROL_RELEASE_IP:
 321                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 322                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 323
 324         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 325                 CHECK_CONTROL_DATA_SIZE(0);
 326                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 327
 328         case CTDB_CONTROL_GET_PUBLIC_IPS:
 329                 CHECK_CONTROL_DATA_SIZE(0);
 330                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 331
 332         case CTDB_CONTROL_TCP_CLIENT:
 333                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 334
 335         case CTDB_CONTROL_STARTUP:
 336                 CHECK_CONTROL_DATA_SIZE(0);
 337                 return ctdb_control_startup(ctdb, srcnode);
 338
 339         case CTDB_CONTROL_TCP_ADD:
 340                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 341                 return ctdb_control_tcp_add(ctdb, indata, false);
 342
 343         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 344                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 345                 return ctdb_control_tcp_add(ctdb, indata, true);
 346
 347         case CTDB_CONTROL_TCP_REMOVE:
 348                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 349                 return ctdb_control_tcp_remove(ctdb, indata);
 350
 351         case CTDB_CONTROL_SET_TUNABLE:
 352                 return ctdb_control_set_tunable(ctdb, indata);
 353
 354         case CTDB_CONTROL_GET_TUNABLE:
 355                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 356
 357         case CTDB_CONTROL_LIST_TUNABLES:
 358                 return ctdb_control_list_tunables(ctdb, outdata);
 359
 360         case CTDB_CONTROL_MODIFY_FLAGS:
 361                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 362                 return ctdb_control_modflags(ctdb, indata);
 363
 364         case CTDB_CONTROL_KILL_TCP:
 365                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 366                 return ctdb_control_kill_tcp(ctdb, indata);
 367
 368         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 369                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 370                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 371
 372         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 373                 /* data size is verified in the called function */
 374                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 375
 376         case CTDB_CONTROL_REGISTER_SERVER_ID:
 377                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 378                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 379
 380         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 381                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 382                 return ctdb_control_unregister_server_id(ctdb, indata);
 383
 384         case CTDB_CONTROL_CHECK_SERVER_ID:
 385                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 386                 return ctdb_control_check_server_id(ctdb, indata);
 387
 388         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 389                 CHECK_CONTROL_DATA_SIZE(0);
 390                 return ctdb_control_get_server_id_list(ctdb, outdata);
 391
 392         case CTDB_CONTROL_PERSISTENT_STORE:
 393                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 394
 395         case CTDB_CONTROL_UPDATE_RECORD:
 396                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 397
 398         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 399                 return ctdb_control_send_gratious_arp(ctdb, indata);
 400
 401         case CTDB_CONTROL_TRANSACTION_START:
 402                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 403                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 404
 405         case CTDB_CONTROL_TRANSACTION_COMMIT:
 406                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 407                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 408
 409         case CTDB_CONTROL_WIPE_DATABASE:
 410                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 411                 return ctdb_control_wipe_database(ctdb, indata);
 412
 413         case CTDB_CONTROL_UPTIME:
 414                 return ctdb_control_uptime(ctdb, outdata);
 415
 416         case CTDB_CONTROL_START_RECOVERY:
 417                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 418
 419         case CTDB_CONTROL_END_RECOVERY:
 420                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 421
 422         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 423                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 424
 425         case CTDB_CONTROL_ADD_PUBLIC_IP:
 426                 return ctdb_control_add_public_address(ctdb, indata);
 427
 428         case CTDB_CONTROL_DEL_PUBLIC_IP:
 429                 return ctdb_control_del_public_address(ctdb, indata);
 430
 431         case CTDB_CONTROL_GET_CAPABILITIES:
 432                 return ctdb_control_get_capabilities(ctdb, outdata);
 433
 434         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 435                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 436
 437         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 438                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 439
 440         case CTDB_CONTROL_TRANS2_COMMIT:
 441         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 442                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 443
 444         case CTDB_CONTROL_TRANS2_ERROR:
 445                 return ctdb_control_trans2_error(ctdb, c);
 446
 447         case CTDB_CONTROL_TRANS2_FINISHED:
 448                 return ctdb_control_trans2_finished(ctdb, c);
 449
 450         case CTDB_CONTROL_TRANS2_ACTIVE:
 451                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 452                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 453
 454         case CTDB_CONTROL_TRANS3_COMMIT:
 455                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 456
 457         case CTDB_CONTROL_RECD_PING:
 458                 CHECK_CONTROL_DATA_SIZE(0);
 459                 return ctdb_control_recd_ping(ctdb);
 460
 461         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 462                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 463                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 464
 465         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 466                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 467                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 468                 return 0;
 469         case CTDB_CONTROL_GET_RECLOCK_FILE:
 470                 CHECK_CONTROL_DATA_SIZE(0);
 471                 if (ctdb->recovery_lock_file != NULL) {
 472                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 473                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 474                 }
 475                 return 0;
 476         case CTDB_CONTROL_SET_RECLOCK_FILE:
 477                 ctdb->tunable.verify_recovery_lock = 0;
 478                 if (ctdb->recovery_lock_file != NULL) {
 479                         talloc_free(ctdb->recovery_lock_file);
 480                         ctdb->recovery_lock_file = NULL;
 481                 }
 482                 if (indata.dsize > 0) {
 483                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 484                         ctdb->tunable.verify_recovery_lock = 1;
 485                 }
 486                 return 0;
 487
 488         case CTDB_CONTROL_STOP_NODE:
 489                 CHECK_CONTROL_DATA_SIZE(0);
 490                 return ctdb_control_stop_node(ctdb, c, async_reply);
 491
 492         case CTDB_CONTROL_CONTINUE_NODE:
 493                 CHECK_CONTROL_DATA_SIZE(0);
 494                 return ctdb_control_continue_node(ctdb);
 495
 496         case CTDB_CONTROL_SET_NATGWSTATE: {
 497                 uint32_t natgwstate;
 498
 499                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 500                 natgwstate = *(uint32_t *)indata.dptr;
 501                 if (natgwstate == 0) {
 502                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 503                 } else {
 504                         ctdb->capabilities |= CTDB_CAP_NATGW;
 505                 }
 506                 return 0;
 507         }
 508
 509         case CTDB_CONTROL_SET_LMASTERROLE: {
 510                 uint32_t lmasterrole;
 511
 512                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 513                 lmasterrole = *(uint32_t *)indata.dptr;
 514                 if (lmasterrole == 0) {
 515                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 516                 } else {
 517                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 518                 }
 519                 return 0;
 520         }
 521
 522         case CTDB_CONTROL_SET_RECMASTERROLE: {
 523                 uint32_t recmasterrole;
 524
 525                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 526                 recmasterrole = *(uint32_t *)indata.dptr;
 527                 if (recmasterrole == 0) {
 528                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 529                 } else {
 530                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 531                 }
 532                 return 0;
 533         }
 534
 535         case CTDB_CONTROL_ENABLE_SCRIPT:
 536                 return ctdb_control_enable_script(ctdb, indata);
 537
 538         case CTDB_CONTROL_DISABLE_SCRIPT:
 539                 return ctdb_control_disable_script(ctdb, indata);
 540
 541         case CTDB_CONTROL_SET_BAN_STATE:
 542                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 543                 return ctdb_control_set_ban_state(ctdb, indata);
 544
 545         case CTDB_CONTROL_GET_BAN_STATE:
 546                 CHECK_CONTROL_DATA_SIZE(0);
 547                 return ctdb_control_get_ban_state(ctdb, outdata);
 548
 549         case CTDB_CONTROL_SET_DB_PRIORITY:
 550                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 551                 return ctdb_control_set_db_priority(ctdb, indata);
 552
 553         case CTDB_CONTROL_GET_DB_PRIORITY: {
 554                 uint32_t db_id;
 555                 struct ctdb_db_context *ctdb_db;
 556
 557                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 558                 db_id = *(uint32_t *)indata.dptr;
 559                 ctdb_db = find_ctdb_db(ctdb, db_id);
 560                 if (ctdb_db == NULL) return -1;
 561                 return ctdb_db->priority;
 562         }
 563
 564         case CTDB_CONTROL_TRANSACTION_CANCEL:
 565                 CHECK_CONTROL_DATA_SIZE(0);
 566                 return ctdb_control_transaction_cancel(ctdb);
 567
 568         case CTDB_CONTROL_REGISTER_NOTIFY:
 569                 return ctdb_control_register_notify(ctdb, client_id, indata);
 570
 571         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 572                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 573                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 574
 575         case CTDB_CONTROL_GET_LOG:
 576                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 577                 return ctdb_control_get_log(ctdb, indata);
 578
 579         case CTDB_CONTROL_CLEAR_LOG:
 580                 return ctdb_control_clear_log(ctdb);
 581
 582         case CTDB_CONTROL_GET_DB_SEQNUM:
 583                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 584                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 585
 586         case CTDB_CONTROL_DB_SET_HEALTHY:
 587                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 588                 return ctdb_control_db_set_healthy(ctdb, indata);
 589
 590         case CTDB_CONTROL_DB_GET_HEALTH:
 591                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 592                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 593
 594         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 595                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 596                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 597
 598         case CTDB_CONTROL_GET_IFACES:
 599                 CHECK_CONTROL_DATA_SIZE(0);
 600                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 601
 602         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 603                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 604                 return ctdb_control_set_iface_link(ctdb, c, indata);
 605
 606         case CTDB_CONTROL_GET_STAT_HISTORY:
 607                 CHECK_CONTROL_DATA_SIZE(0);
 608                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 609
 610         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 611                 struct ctdb_control_schedule_for_deletion *d;
 612                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 613                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 614                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 615                 size += d->keylen;
 616                 CHECK_CONTROL_DATA_SIZE(size);
 617                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 618         }
 619         default:
 620                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 621                 return -1;
 622         }
 623 }
 624
 625 /*
 626   send a reply for a ctdb control
 627  */
 628 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 629                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 630 {
 631         struct ctdb_reply_control *r;
 632         size_t len;
 633
 634         /* some controls send no reply */
 635         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 636                 return;
 637         }
 638
 639         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 640         if (errormsg) {
 641                 len += strlen(errormsg);
 642         }
 643         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 644         CTDB_NO_MEMORY_VOID(ctdb, r);
 645
 646         r->hdr.destnode     = c->hdr.srcnode;
 647         r->hdr.reqid        = c->hdr.reqid;
 648         r->status           = status;
 649         r->datalen          = outdata?outdata->dsize:0;
 650         if (outdata && outdata->dsize) {
 651                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 652         }
 653         if (errormsg) {
 654                 r->errorlen = strlen(errormsg);
 655                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 656         }
 657
 658         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 659
 660         talloc_free(r);
 661 }
 662
 663 /*
 664   called when a CTDB_REQ_CONTROL packet comes in
 665 */
 666 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 667 {
 668         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 669         TDB_DATA data, *outdata;
 670         int32_t status;
 671         bool async_reply = False;
 672         const char *errormsg = NULL;
 673
 674         data.dptr = &c->data[0];
 675         data.dsize = c->datalen;
 676
 677         outdata = talloc_zero(c, TDB_DATA);
 678
 679         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 680                                        &errormsg, &async_reply);
 681
 682         if (!async_reply) {
 683                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 684         }
 685 }
 686
 687 /*
 688   called when a CTDB_REPLY_CONTROL packet comes in
 689 */
 690 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 691 {
 692         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 693         TDB_DATA data;
 694         struct ctdb_control_state *state;
 695         const char *errormsg = NULL;
 696
 697         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 698         if (state == NULL) {
 699                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 700                          ctdb->pnn, hdr->reqid));
 701                 return;
 702         }
 703
 704         if (hdr->reqid != state->reqid) {
 705                 /* we found a record  but it was the wrong one */
 706                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 707                 return;
 708         }
 709
 710         data.dptr = &c->data[0];
 711         data.dsize = c->datalen;
 712         if (c->errorlen) {
 713                 errormsg = talloc_strndup(state,
 714                                           (char *)&c->data[c->datalen], c->errorlen);
 715         }
 716
 717         /* make state a child of the packet, so it goes away when the packet
 718            is freed. */
 719         talloc_steal(hdr, state);
 720
 721         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 722 }
 723
 724 static int ctdb_control_destructor(struct ctdb_control_state *state)
 725 {
 726         ctdb_reqid_remove(state->ctdb, state->reqid);
 727         return 0;
 728 }
 729
 730 /*
 731   handle a timeout of a control
 732  */
 733 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 734                        struct timeval t, void *private_data)
 735 {
 736         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 737         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 738
 739         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 740
 741         talloc_steal(tmp_ctx, state);
 742
 743         state->callback(state->ctdb, -1, tdb_null,
 744                         "ctdb_control timed out",
 745                         state->private_data);
 746         talloc_free(tmp_ctx);
 747 }
 748
 749
 750 /*
 751   send a control message to a node
 752  */
 753 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 754                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 755                              uint32_t flags,
 756                              TDB_DATA data,
 757                              ctdb_control_callback_fn_t callback,
 758                              void *private_data)
 759 {
 760         struct ctdb_req_control *c;
 761         struct ctdb_control_state *state;
 762         size_t len;
 763
 764         if (ctdb->methods == NULL) {
 765                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 766                 return -1;
 767         }
 768
 769         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 770              (destnode == CTDB_BROADCAST_ALL) ||
 771              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 772             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 773                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 774                 return -1;
 775         }
 776
 777         if (destnode != CTDB_BROADCAST_VNNMAP &&
 778             destnode != CTDB_BROADCAST_ALL &&
 779             destnode != CTDB_BROADCAST_CONNECTED &&
 780             (!ctdb_validate_pnn(ctdb, destnode) ||
 781              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 782                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 783                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 784                 }
 785                 return 0;
 786         }
 787
 788         /* the state is made a child of private_data if possible. This means any reply
 789            will be discarded if the private_data goes away */
 790         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 791         CTDB_NO_MEMORY(ctdb, state);
 792
 793         state->reqid = ctdb_reqid_new(ctdb, state);
 794         state->callback = callback;
 795         state->private_data = private_data;
 796         state->ctdb = ctdb;
 797         state->flags = flags;
 798
 799         talloc_set_destructor(state, ctdb_control_destructor);
 800
 801         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 802         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 803                                     struct ctdb_req_control);
 804         CTDB_NO_MEMORY(ctdb, c);
 805         talloc_set_name_const(c, "ctdb_req_control packet");
 806
 807         c->hdr.destnode     = destnode;
 808         c->hdr.reqid        = state->reqid;
 809         c->opcode           = opcode;
 810         c->client_id        = client_id;
 811         c->flags            = flags;
 812         c->srvid            = srvid;
 813         c->datalen          = data.dsize;
 814         if (data.dsize) {
 815                 memcpy(&c->data[0], data.dptr, data.dsize);
 816         }
 817
 818         ctdb_queue_packet(ctdb, &c->hdr);
 819
 820         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 821                 talloc_free(state);
 822                 return 0;
 823         }
 824
 825         if (ctdb->tunable.control_timeout) {
 826                 event_add_timed(ctdb->ev, state,
 827                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 828                                 ctdb_control_timeout, state);
 829         }
 830
 831         talloc_free(c);
 832         return 0;
 833 }