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/tdb/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 "db_wrap.h"
  27
  28
  29 struct ctdb_control_state {
  30         struct ctdb_context *ctdb;
  31         uint32_t reqid;
  32         ctdb_control_callback_fn_t callback;
  33         void *private_data;
  34         unsigned flags;
  35 };
  36
  37
  38 /*
  39   dump talloc memory hierarchy, returning it as a blob to the client
  40  */
  41 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata)
  42 {
  43         /* dump to a file, then send the file as a blob */
  44         FILE *f;
  45         long fsize;
  46         f = tmpfile();
  47         if (f == NULL) {
  48                 DEBUG(DEBUG_ERR,(__location__ " Unable to open tmpfile - %s\n", strerror(errno)));
  49                 return -1;
  50         }
  51         talloc_report_full(NULL, f);
  52         fsize = ftell(f);
  53         rewind(f);
  54         outdata->dptr = talloc_size(outdata, fsize);
  55         CTDB_NO_MEMORY(ctdb, outdata->dptr);
  56         outdata->dsize = fread(outdata->dptr, 1, fsize, f);
  57         fclose(f);
  58         if (outdata->dsize != fsize) {
  59                 DEBUG(DEBUG_ERR,(__location__ " Unable to read tmpfile\n"));
  60                 return -1;
  61         }
  62         return 0;
  63 }
  64
  65
  66 /*
  67   process a control request
  68  */
  69 static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
  70                                      struct ctdb_req_control *c,
  71                                      TDB_DATA indata,
  72                                      TDB_DATA *outdata, uint32_t srcnode,
  73                                      const char **errormsg,
  74                                      bool *async_reply)
  75 {
  76         uint32_t opcode = c->opcode;
  77         uint64_t srvid = c->srvid;
  78         uint32_t client_id = c->client_id;
  79
  80         switch (opcode) {
  81         case CTDB_CONTROL_PROCESS_EXISTS: {
  82                 CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
  83                 return ctdb_control_process_exists(ctdb, *(pid_t *)indata.dptr);
  84         }
  85
  86         case CTDB_CONTROL_SET_DEBUG: {
  87                 CHECK_CONTROL_DATA_SIZE(sizeof(int32_t));
  88                 LogLevel = *(int32_t *)indata.dptr;
  89                 return 0;
  90         }
  91
  92         case CTDB_CONTROL_GET_DEBUG: {
  93                 CHECK_CONTROL_DATA_SIZE(0);
  94                 outdata->dptr = (uint8_t *)&LogLevel;
  95                 outdata->dsize = sizeof(LogLevel);
  96                 return 0;
  97         }
  98
  99         case CTDB_CONTROL_STATISTICS: {
 100                 int i;
 101                 CHECK_CONTROL_DATA_SIZE(0);
 102                 ctdb->statistics.memory_used = talloc_total_size(NULL);
 103                 ctdb->statistics.num_clients = ctdb->num_clients;
 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_SET_DB_STICKY: {
 154                 uint32_t db_id;
 155                 struct ctdb_db_context *ctdb_db;
 156
 157                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 158                 db_id = *(uint32_t *)indata.dptr;
 159                 ctdb_db = find_ctdb_db(ctdb, db_id);
 160                 if (ctdb_db == NULL) return -1;
 161                 return ctdb_set_db_sticky(ctdb, ctdb_db);
 162         }
 163
 164         case CTDB_CONTROL_SETVNNMAP:
 165                 return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
 166
 167         case CTDB_CONTROL_PULL_DB:
 168                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
 169                 return ctdb_control_pull_db(ctdb, indata, outdata);
 170
 171         case CTDB_CONTROL_SET_DMASTER:
 172                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
 173                 DEBUG(DEBUG_ERR, ("The SET_DMASTER control is not implemented "
 174                                   "any more.\n"));
 175                 return  -1;
 176
 177         case CTDB_CONTROL_PUSH_DB:
 178                 return ctdb_control_push_db(ctdb, indata);
 179
 180         case CTDB_CONTROL_GET_RECMODE: {
 181                 int i;
 182                 if (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE) {
 183                         return CTDB_RECOVERY_ACTIVE;
 184                 }
 185                 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
 186                         if (ctdb->freeze_mode[i] == CTDB_FREEZE_FROZEN) {
 187                                 return CTDB_RECOVERY_ACTIVE;
 188                         }
 189                 }
 190                 return CTDB_RECOVERY_NORMAL;
 191         }
 192
 193         case CTDB_CONTROL_SET_RECMASTER: {
 194                 return ctdb_control_set_recmaster(ctdb, opcode, indata);
 195         }
 196
 197         case CTDB_CONTROL_GET_RECMASTER:
 198                 return ctdb->recovery_master;
 199
 200         case CTDB_CONTROL_GET_PID:
 201                 return getpid();
 202
 203         case CTDB_CONTROL_GET_PNN:
 204                 return ctdb->pnn;
 205
 206         case CTDB_CONTROL_PING:
 207                 CHECK_CONTROL_DATA_SIZE(0);
 208                 return ctdb->num_clients;
 209
 210         case CTDB_CONTROL_SET_DB_READONLY: {
 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                 return ctdb_set_db_readonly(ctdb, ctdb_db);
 219         }
 220         case CTDB_CONTROL_GET_DBNAME: {
 221                 uint32_t db_id;
 222                 struct ctdb_db_context *ctdb_db;
 223
 224                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 225                 db_id = *(uint32_t *)indata.dptr;
 226                 ctdb_db = find_ctdb_db(ctdb, db_id);
 227                 if (ctdb_db == NULL) return -1;
 228                 outdata->dptr = discard_const(ctdb_db->db_name);
 229                 outdata->dsize = strlen(ctdb_db->db_name)+1;
 230                 return 0;
 231         }
 232
 233         case CTDB_CONTROL_GETDBPATH: {
 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                 outdata->dptr = discard_const(ctdb_db->db_path);
 242                 outdata->dsize = strlen(ctdb_db->db_path)+1;
 243                 return 0;
 244         }
 245
 246         case CTDB_CONTROL_DB_ATTACH:
 247           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, false, client_id, c, async_reply);
 248
 249         case CTDB_CONTROL_DB_ATTACH_PERSISTENT:
 250           return ctdb_control_db_attach(ctdb, indata, outdata, srvid, true, client_id, c, async_reply);
 251
 252         case CTDB_CONTROL_SET_CALL: {
 253                 struct ctdb_control_set_call *sc =
 254                         (struct ctdb_control_set_call *)indata.dptr;
 255                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
 256                 return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
 257         }
 258
 259         case CTDB_CONTROL_TRAVERSE_START:
 260                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 261                 return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode, client_id);
 262
 263         case CTDB_CONTROL_TRAVERSE_START_EXT:
 264                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start_ext));
 265                 return ctdb_control_traverse_start_ext(ctdb, indata, outdata, srcnode, client_id);
 266
 267         case CTDB_CONTROL_TRAVERSE_ALL:
 268                 return ctdb_control_traverse_all(ctdb, indata, outdata);
 269
 270         case CTDB_CONTROL_TRAVERSE_ALL_EXT:
 271                 return ctdb_control_traverse_all_ext(ctdb, indata, outdata);
 272
 273         case CTDB_CONTROL_TRAVERSE_DATA:
 274                 return ctdb_control_traverse_data(ctdb, indata, outdata);
 275
 276         case CTDB_CONTROL_TRAVERSE_KILL:
 277                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
 278                 return ctdb_control_traverse_kill(ctdb, indata, outdata, srcnode);
 279
 280         case CTDB_CONTROL_REGISTER_SRVID:
 281                 return daemon_register_message_handler(ctdb, client_id, srvid);
 282
 283         case CTDB_CONTROL_DEREGISTER_SRVID:
 284                 return daemon_deregister_message_handler(ctdb, client_id, srvid);
 285
 286         case CTDB_CONTROL_CHECK_SRVIDS:
 287                 return daemon_check_srvids(ctdb, indata, outdata);
 288
 289         case CTDB_CONTROL_ENABLE_SEQNUM:
 290                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 291                 return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
 292
 293         case CTDB_CONTROL_UPDATE_SEQNUM:
 294                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 295                 return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
 296
 297         case CTDB_CONTROL_FREEZE:
 298                 CHECK_CONTROL_DATA_SIZE(0);
 299                 return ctdb_control_freeze(ctdb, c, async_reply);
 300
 301         case CTDB_CONTROL_THAW:
 302                 CHECK_CONTROL_DATA_SIZE(0);
 303                 return ctdb_control_thaw(ctdb, (uint32_t)c->srvid);
 304
 305         case CTDB_CONTROL_SET_RECMODE:
 306                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 307                 return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
 308
 309         case CTDB_CONTROL_GET_MONMODE:
 310                 CHECK_CONTROL_DATA_SIZE(0);
 311                 return ctdb_monitoring_mode(ctdb);
 312
 313         case CTDB_CONTROL_ENABLE_MONITOR:
 314                 CHECK_CONTROL_DATA_SIZE(0);
 315                 ctdb_enable_monitoring(ctdb);
 316                 return 0;
 317
 318         case CTDB_CONTROL_RUN_EVENTSCRIPTS:
 319                 return ctdb_run_eventscripts(ctdb, c, indata, async_reply);
 320
 321         case CTDB_CONTROL_DISABLE_MONITOR:
 322                 CHECK_CONTROL_DATA_SIZE(0);
 323                 ctdb_disable_monitoring(ctdb);
 324                 return 0;
 325
 326         case CTDB_CONTROL_SHUTDOWN:
 327                 DEBUG(DEBUG_NOTICE,("Received SHUTDOWN command. Stopping CTDB daemon.\n"));
 328                 ctdb_stop_recoverd(ctdb);
 329                 ctdb_stop_keepalive(ctdb);
 330                 ctdb_stop_monitoring(ctdb);
 331                 ctdb_release_all_ips(ctdb);
 332                 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
 333                 if (ctdb->methods != NULL) {
 334                         ctdb->methods->shutdown(ctdb);
 335                 }
 336                 exit(0);
 337
 338         case CTDB_CONTROL_TAKEOVER_IPv4:
 339                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 340                 return ctdb_control_takeover_ipv4(ctdb, c, indata, async_reply);
 341
 342         case CTDB_CONTROL_TAKEOVER_IP:
 343                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 344                 return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
 345
 346         case CTDB_CONTROL_RELEASE_IPv4:
 347                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ipv4));
 348                 return ctdb_control_release_ipv4(ctdb, c, indata, async_reply);
 349
 350         case CTDB_CONTROL_RELEASE_IP:
 351                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
 352                 return ctdb_control_release_ip(ctdb, c, indata, async_reply);
 353
 354         case CTDB_CONTROL_IPREALLOCATED:
 355                 CHECK_CONTROL_DATA_SIZE(0);
 356                 return ctdb_control_ipreallocated(ctdb, c, async_reply);
 357
 358         case CTDB_CONTROL_GET_PUBLIC_IPSv4:
 359                 CHECK_CONTROL_DATA_SIZE(0);
 360                 return ctdb_control_get_public_ipsv4(ctdb, c, outdata);
 361
 362         case CTDB_CONTROL_GET_PUBLIC_IPS:
 363                 CHECK_CONTROL_DATA_SIZE(0);
 364                 return ctdb_control_get_public_ips(ctdb, c, outdata);
 365
 366         case CTDB_CONTROL_TCP_CLIENT:
 367                 return ctdb_control_tcp_client(ctdb, client_id, indata);
 368
 369         case CTDB_CONTROL_STARTUP:
 370                 CHECK_CONTROL_DATA_SIZE(0);
 371                 return ctdb_control_startup(ctdb, srcnode);
 372
 373         case CTDB_CONTROL_TCP_ADD:
 374                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 375                 return ctdb_control_tcp_add(ctdb, indata, false);
 376
 377         case CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE:
 378                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 379                 return ctdb_control_tcp_add(ctdb, indata, true);
 380
 381         case CTDB_CONTROL_TCP_REMOVE:
 382                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_tcp_connection));
 383                 return ctdb_control_tcp_remove(ctdb, indata);
 384
 385         case CTDB_CONTROL_SET_TUNABLE:
 386                 return ctdb_control_set_tunable(ctdb, indata);
 387
 388         case CTDB_CONTROL_GET_TUNABLE:
 389                 return ctdb_control_get_tunable(ctdb, indata, outdata);
 390
 391         case CTDB_CONTROL_LIST_TUNABLES:
 392                 return ctdb_control_list_tunables(ctdb, outdata);
 393
 394         case CTDB_CONTROL_MODIFY_FLAGS:
 395                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_flag_change));
 396                 return ctdb_control_modflags(ctdb, indata);
 397
 398         case CTDB_CONTROL_KILL_TCP:
 399                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_killtcp));
 400                 return ctdb_control_kill_tcp(ctdb, indata);
 401
 402         case CTDB_CONTROL_GET_TCP_TICKLE_LIST:
 403                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 404                 return ctdb_control_get_tcp_tickle_list(ctdb, indata, outdata);
 405
 406         case CTDB_CONTROL_SET_TCP_TICKLE_LIST:
 407                 /* data size is verified in the called function */
 408                 return ctdb_control_set_tcp_tickle_list(ctdb, indata);
 409
 410         case CTDB_CONTROL_REGISTER_SERVER_ID:
 411                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 412                 return ctdb_control_register_server_id(ctdb, client_id, indata);
 413
 414         case CTDB_CONTROL_UNREGISTER_SERVER_ID:
 415                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 416                 return ctdb_control_unregister_server_id(ctdb, indata);
 417
 418         case CTDB_CONTROL_CHECK_SERVER_ID:
 419                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_server_id));
 420                 return ctdb_control_check_server_id(ctdb, indata);
 421
 422         case CTDB_CONTROL_GET_SERVER_ID_LIST:
 423                 CHECK_CONTROL_DATA_SIZE(0);
 424                 return ctdb_control_get_server_id_list(ctdb, outdata);
 425
 426         case CTDB_CONTROL_PERSISTENT_STORE:
 427                 return ctdb_control_persistent_store(ctdb, c, indata, async_reply);
 428
 429         case CTDB_CONTROL_UPDATE_RECORD:
 430                 return ctdb_control_update_record(ctdb, c, indata, async_reply);
 431
 432         case CTDB_CONTROL_SEND_GRATIOUS_ARP:
 433                 return ctdb_control_send_gratious_arp(ctdb, indata);
 434
 435         case CTDB_CONTROL_TRANSACTION_START:
 436                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 437                 return ctdb_control_transaction_start(ctdb, *(uint32_t *)indata.dptr);
 438
 439         case CTDB_CONTROL_TRANSACTION_COMMIT:
 440                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 441                 return ctdb_control_transaction_commit(ctdb, *(uint32_t *)indata.dptr);
 442
 443         case CTDB_CONTROL_WIPE_DATABASE:
 444                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_wipe_database));
 445                 return ctdb_control_wipe_database(ctdb, indata);
 446
 447         case CTDB_CONTROL_UPTIME:
 448                 return ctdb_control_uptime(ctdb, outdata);
 449
 450         case CTDB_CONTROL_START_RECOVERY:
 451                 return ctdb_control_start_recovery(ctdb, c, async_reply);
 452
 453         case CTDB_CONTROL_END_RECOVERY:
 454                 return ctdb_control_end_recovery(ctdb, c, async_reply);
 455
 456         case CTDB_CONTROL_TRY_DELETE_RECORDS:
 457                 return ctdb_control_try_delete_records(ctdb, indata, outdata);
 458
 459         case CTDB_CONTROL_ADD_PUBLIC_IP:
 460                 return ctdb_control_add_public_address(ctdb, indata);
 461
 462         case CTDB_CONTROL_DEL_PUBLIC_IP:
 463                 return ctdb_control_del_public_address(ctdb, indata);
 464
 465         case CTDB_CONTROL_GET_CAPABILITIES:
 466                 return ctdb_control_get_capabilities(ctdb, outdata);
 467
 468         case CTDB_CONTROL_START_PERSISTENT_UPDATE:
 469                 return ctdb_control_start_persistent_update(ctdb, c, indata);
 470
 471         case CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE:
 472                 return ctdb_control_cancel_persistent_update(ctdb, c, indata);
 473
 474         case CTDB_CONTROL_TRANS2_COMMIT:
 475         case CTDB_CONTROL_TRANS2_COMMIT_RETRY:
 476                 return ctdb_control_trans2_commit(ctdb, c, indata, async_reply);
 477
 478         case CTDB_CONTROL_TRANS2_ERROR:
 479                 return ctdb_control_trans2_error(ctdb, c);
 480
 481         case CTDB_CONTROL_TRANS2_FINISHED:
 482                 return ctdb_control_trans2_finished(ctdb, c);
 483
 484         case CTDB_CONTROL_TRANS2_ACTIVE:
 485                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 486                 return ctdb_control_trans2_active(ctdb, c, *(uint32_t *)indata.dptr);
 487
 488         case CTDB_CONTROL_TRANS3_COMMIT:
 489                 return ctdb_control_trans3_commit(ctdb, c, indata, async_reply);
 490
 491         case CTDB_CONTROL_RECD_PING:
 492                 CHECK_CONTROL_DATA_SIZE(0);
 493                 return ctdb_control_recd_ping(ctdb);
 494
 495         case CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS:
 496                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 497                 return ctdb_control_get_event_script_status(ctdb, *(uint32_t *)indata.dptr, outdata);
 498
 499         case CTDB_CONTROL_RECD_RECLOCK_LATENCY:
 500                 CHECK_CONTROL_DATA_SIZE(sizeof(double));
 501                 CTDB_UPDATE_RECLOCK_LATENCY(ctdb, "recd reclock", reclock.recd, *((double *)indata.dptr));
 502                 return 0;
 503         case CTDB_CONTROL_GET_RECLOCK_FILE:
 504                 CHECK_CONTROL_DATA_SIZE(0);
 505                 if (ctdb->recovery_lock_file != NULL) {
 506                         outdata->dptr  = discard_const(ctdb->recovery_lock_file);
 507                         outdata->dsize = strlen(ctdb->recovery_lock_file) + 1;
 508                 }
 509                 return 0;
 510         case CTDB_CONTROL_SET_RECLOCK_FILE:
 511                 ctdb->tunable.verify_recovery_lock = 0;
 512                 if (ctdb->recovery_lock_file != NULL) {
 513                         talloc_free(ctdb->recovery_lock_file);
 514                         ctdb->recovery_lock_file = NULL;
 515                 }
 516                 if (indata.dsize > 0) {
 517                         ctdb->recovery_lock_file = talloc_strdup(ctdb, discard_const(indata.dptr));
 518                         ctdb->tunable.verify_recovery_lock = 1;
 519                 }
 520                 return 0;
 521
 522         case CTDB_CONTROL_STOP_NODE:
 523                 CHECK_CONTROL_DATA_SIZE(0);
 524                 return ctdb_control_stop_node(ctdb);
 525
 526         case CTDB_CONTROL_CONTINUE_NODE:
 527                 CHECK_CONTROL_DATA_SIZE(0);
 528                 return ctdb_control_continue_node(ctdb);
 529
 530         case CTDB_CONTROL_SET_NATGWSTATE: {
 531                 uint32_t natgwstate;
 532
 533                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 534                 natgwstate = *(uint32_t *)indata.dptr;
 535                 if (natgwstate == 0) {
 536                         ctdb->capabilities &= ~CTDB_CAP_NATGW;
 537                 } else {
 538                         ctdb->capabilities |= CTDB_CAP_NATGW;
 539                 }
 540                 return 0;
 541         }
 542
 543         case CTDB_CONTROL_SET_LMASTERROLE: {
 544                 uint32_t lmasterrole;
 545
 546                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 547                 lmasterrole = *(uint32_t *)indata.dptr;
 548                 if (lmasterrole == 0) {
 549                         ctdb->capabilities &= ~CTDB_CAP_LMASTER;
 550                 } else {
 551                         ctdb->capabilities |= CTDB_CAP_LMASTER;
 552                 }
 553                 return 0;
 554         }
 555
 556         case CTDB_CONTROL_SET_RECMASTERROLE: {
 557                 uint32_t recmasterrole;
 558
 559                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 560                 recmasterrole = *(uint32_t *)indata.dptr;
 561                 if (recmasterrole == 0) {
 562                         ctdb->capabilities &= ~CTDB_CAP_RECMASTER;
 563                 } else {
 564                         ctdb->capabilities |= CTDB_CAP_RECMASTER;
 565                 }
 566                 return 0;
 567         }
 568
 569         case CTDB_CONTROL_ENABLE_SCRIPT:
 570                 return ctdb_control_enable_script(ctdb, indata);
 571
 572         case CTDB_CONTROL_DISABLE_SCRIPT:
 573                 return ctdb_control_disable_script(ctdb, indata);
 574
 575         case CTDB_CONTROL_SET_BAN_STATE:
 576                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_ban_time));
 577                 return ctdb_control_set_ban_state(ctdb, indata);
 578
 579         case CTDB_CONTROL_GET_BAN_STATE:
 580                 CHECK_CONTROL_DATA_SIZE(0);
 581                 return ctdb_control_get_ban_state(ctdb, outdata);
 582
 583         case CTDB_CONTROL_SET_DB_PRIORITY:
 584                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_db_priority));
 585                 return ctdb_control_set_db_priority(ctdb, indata);
 586
 587         case CTDB_CONTROL_GET_DB_PRIORITY: {
 588                 uint32_t db_id;
 589                 struct ctdb_db_context *ctdb_db;
 590
 591                 CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
 592                 db_id = *(uint32_t *)indata.dptr;
 593                 ctdb_db = find_ctdb_db(ctdb, db_id);
 594                 if (ctdb_db == NULL) return -1;
 595                 return ctdb_db->priority;
 596         }
 597
 598         case CTDB_CONTROL_TRANSACTION_CANCEL:
 599                 CHECK_CONTROL_DATA_SIZE(0);
 600                 return ctdb_control_transaction_cancel(ctdb);
 601
 602         case CTDB_CONTROL_REGISTER_NOTIFY:
 603                 return ctdb_control_register_notify(ctdb, client_id, indata);
 604
 605         case CTDB_CONTROL_DEREGISTER_NOTIFY:
 606                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_client_notify_deregister));
 607                 return ctdb_control_deregister_notify(ctdb, client_id, indata);
 608
 609         case CTDB_CONTROL_GET_LOG:
 610                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_get_log_addr));
 611                 return ctdb_control_get_log(ctdb, indata);
 612
 613         case CTDB_CONTROL_CLEAR_LOG:
 614                 return ctdb_control_clear_log(ctdb);
 615
 616         case CTDB_CONTROL_GET_DB_SEQNUM:
 617                 CHECK_CONTROL_DATA_SIZE(sizeof(uint64_t));
 618                 return ctdb_control_get_db_seqnum(ctdb, indata, outdata);
 619
 620         case CTDB_CONTROL_DB_SET_HEALTHY:
 621                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 622                 return ctdb_control_db_set_healthy(ctdb, indata);
 623
 624         case CTDB_CONTROL_DB_GET_HEALTH:
 625                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 626                 return ctdb_control_db_get_health(ctdb, indata, outdata);
 627
 628         case CTDB_CONTROL_GET_PUBLIC_IP_INFO:
 629                 CHECK_CONTROL_DATA_SIZE(sizeof(ctdb_sock_addr));
 630                 return ctdb_control_get_public_ip_info(ctdb, c, indata, outdata);
 631
 632         case CTDB_CONTROL_GET_IFACES:
 633                 CHECK_CONTROL_DATA_SIZE(0);
 634                 return ctdb_control_get_ifaces(ctdb, c, outdata);
 635
 636         case CTDB_CONTROL_SET_IFACE_LINK_STATE:
 637                 CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_iface_info));
 638                 return ctdb_control_set_iface_link(ctdb, c, indata);
 639
 640         case CTDB_CONTROL_GET_STAT_HISTORY:
 641                 CHECK_CONTROL_DATA_SIZE(0);
 642                 return ctdb_control_get_stat_history(ctdb, c, outdata);
 643
 644         case CTDB_CONTROL_SCHEDULE_FOR_DELETION: {
 645                 struct ctdb_control_schedule_for_deletion *d;
 646                 size_t size = offsetof(struct ctdb_control_schedule_for_deletion, key);
 647                 CHECK_CONTROL_MIN_DATA_SIZE(size);
 648                 d = (struct ctdb_control_schedule_for_deletion *)indata.dptr;
 649                 size += d->keylen;
 650                 CHECK_CONTROL_DATA_SIZE(size);
 651                 return ctdb_control_schedule_for_deletion(ctdb, indata);
 652         }
 653         case CTDB_CONTROL_GET_DB_STATISTICS:
 654                 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
 655                 return ctdb_control_get_db_statistics(ctdb, *(uint32_t *)indata.dptr, outdata);
 656
 657         case CTDB_CONTROL_RELOAD_PUBLIC_IPS:
 658                 CHECK_CONTROL_DATA_SIZE(0);
 659                 return ctdb_control_reload_public_ips(ctdb, c, async_reply);
 660
 661         case CTDB_CONTROL_RECEIVE_RECORDS:
 662                 return ctdb_control_receive_records(ctdb, indata, outdata);
 663
 664         default:
 665                 DEBUG(DEBUG_CRIT,(__location__ " Unknown CTDB control opcode %u\n", opcode));
 666                 return -1;
 667         }
 668 }
 669
 670 /*
 671   send a reply for a ctdb control
 672  */
 673 void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
 674                                 TDB_DATA *outdata, int32_t status, const char *errormsg)
 675 {
 676         struct ctdb_reply_control *r;
 677         size_t len;
 678
 679         /* some controls send no reply */
 680         if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
 681                 return;
 682         }
 683
 684         len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
 685         if (errormsg) {
 686                 len += strlen(errormsg);
 687         }
 688         r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
 689         if (r == NULL) {
 690                 DEBUG(DEBUG_ERR,(__location__ "Unable to allocate transport - OOM or transport is down\n"));
 691                 return;
 692         }
 693
 694         r->hdr.destnode     = c->hdr.srcnode;
 695         r->hdr.reqid        = c->hdr.reqid;
 696         r->status           = status;
 697         r->datalen          = outdata?outdata->dsize:0;
 698         if (outdata && outdata->dsize) {
 699                 memcpy(&r->data[0], outdata->dptr, outdata->dsize);
 700         }
 701         if (errormsg) {
 702                 r->errorlen = strlen(errormsg);
 703                 memcpy(&r->data[r->datalen], errormsg, r->errorlen);
 704         }
 705
 706         ctdb_queue_packet_opcode(ctdb, &r->hdr, c->opcode);
 707
 708         talloc_free(r);
 709 }
 710
 711 /*
 712   called when a CTDB_REQ_CONTROL packet comes in
 713 */
 714 void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 715 {
 716         struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
 717         TDB_DATA data, *outdata;
 718         int32_t status;
 719         bool async_reply = false;
 720         const char *errormsg = NULL;
 721
 722         data.dptr = &c->data[0];
 723         data.dsize = c->datalen;
 724
 725         outdata = talloc_zero(c, TDB_DATA);
 726
 727         status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
 728                                        &errormsg, &async_reply);
 729
 730         if (!async_reply) {
 731                 ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
 732         }
 733 }
 734
 735 /*
 736   called when a CTDB_REPLY_CONTROL packet comes in
 737 */
 738 void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
 739 {
 740         struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
 741         TDB_DATA data;
 742         struct ctdb_control_state *state;
 743         const char *errormsg = NULL;
 744
 745         state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
 746         if (state == NULL) {
 747                 DEBUG(DEBUG_ERR,("pnn %u Invalid reqid %u in ctdb_reply_control\n",
 748                          ctdb->pnn, hdr->reqid));
 749                 return;
 750         }
 751
 752         if (hdr->reqid != state->reqid) {
 753                 /* we found a record  but it was the wrong one */
 754                 DEBUG(DEBUG_ERR, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
 755                 return;
 756         }
 757
 758         data.dptr = &c->data[0];
 759         data.dsize = c->datalen;
 760         if (c->errorlen) {
 761                 errormsg = talloc_strndup(state,
 762                                           (char *)&c->data[c->datalen], c->errorlen);
 763         }
 764
 765         /* make state a child of the packet, so it goes away when the packet
 766            is freed. */
 767         talloc_steal(hdr, state);
 768
 769         state->callback(ctdb, c->status, data, errormsg, state->private_data);
 770 }
 771
 772 static int ctdb_control_destructor(struct ctdb_control_state *state)
 773 {
 774         ctdb_reqid_remove(state->ctdb, state->reqid);
 775         return 0;
 776 }
 777
 778 /*
 779   handle a timeout of a control
 780  */
 781 static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
 782                        struct timeval t, void *private_data)
 783 {
 784         struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
 785         TALLOC_CTX *tmp_ctx = talloc_new(ev);
 786
 787         CTDB_INCREMENT_STAT(state->ctdb, timeouts.control);
 788
 789         talloc_steal(tmp_ctx, state);
 790
 791         state->callback(state->ctdb, -1, tdb_null,
 792                         "ctdb_control timed out",
 793                         state->private_data);
 794         talloc_free(tmp_ctx);
 795 }
 796
 797
 798 /*
 799   send a control message to a node
 800  */
 801 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 802                              uint64_t srvid, uint32_t opcode, uint32_t client_id,
 803                              uint32_t flags,
 804                              TDB_DATA data,
 805                              ctdb_control_callback_fn_t callback,
 806                              void *private_data)
 807 {
 808         struct ctdb_req_control *c;
 809         struct ctdb_control_state *state;
 810         size_t len;
 811
 812         if (ctdb->methods == NULL) {
 813                 DEBUG(DEBUG_INFO,(__location__ " Failed to send control. Transport is DOWN\n"));
 814                 return -1;
 815         }
 816
 817         if (((destnode == CTDB_BROADCAST_VNNMAP) ||
 818              (destnode == CTDB_BROADCAST_ALL) ||
 819              (destnode == CTDB_BROADCAST_CONNECTED)) &&
 820             !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 821                 DEBUG(DEBUG_CRIT,("Attempt to broadcast control without NOREPLY\n"));
 822                 return -1;
 823         }
 824
 825         if (destnode != CTDB_BROADCAST_VNNMAP &&
 826             destnode != CTDB_BROADCAST_ALL &&
 827             destnode != CTDB_BROADCAST_CONNECTED &&
 828             (!ctdb_validate_pnn(ctdb, destnode) ||
 829              (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
 830                 if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
 831                         callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
 832                 }
 833                 return 0;
 834         }
 835
 836         /* the state is made a child of private_data if possible. This means any reply
 837            will be discarded if the private_data goes away */
 838         state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
 839         CTDB_NO_MEMORY(ctdb, state);
 840
 841         state->reqid = ctdb_reqid_new(ctdb, state);
 842         state->callback = callback;
 843         state->private_data = private_data;
 844         state->ctdb = ctdb;
 845         state->flags = flags;
 846
 847         talloc_set_destructor(state, ctdb_control_destructor);
 848
 849         len = offsetof(struct ctdb_req_control, data) + data.dsize;
 850         c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
 851                                     struct ctdb_req_control);
 852         CTDB_NO_MEMORY(ctdb, c);
 853         talloc_set_name_const(c, "ctdb_req_control packet");
 854
 855         c->hdr.destnode     = destnode;
 856         c->hdr.reqid        = state->reqid;
 857         c->opcode           = opcode;
 858         c->client_id        = client_id;
 859         c->flags            = flags;
 860         c->srvid            = srvid;
 861         c->datalen          = data.dsize;
 862         if (data.dsize) {
 863                 memcpy(&c->data[0], data.dptr, data.dsize);
 864         }
 865
 866         ctdb_queue_packet(ctdb, &c->hdr);
 867
 868         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 869                 talloc_free(state);
 870                 return 0;
 871         }
 872
 873         if (ctdb->tunable.control_timeout) {
 874                 event_add_timed(ctdb->ev, state,
 875                                 timeval_current_ofs(ctdb->tunable.control_timeout, 0),
 876                                 ctdb_control_timeout, state);
 877         }
 878
 879         talloc_free(c);
 880         return 0;
 881 }