granicus.if.org Git - postgresql/blob - src/bin/pg_upgrade/controldata.c

   1 /*
   2  *      controldata.c
   3  *
   4  *      controldata functions
   5  *
   6  *      Copyright (c) 2010-2019, PostgreSQL Global Development Group
   7  *      src/bin/pg_upgrade/controldata.c
   8  */
   9
  10 #include "postgres_fe.h"
  11
  12 #include "pg_upgrade.h"
  13
  14 #include <ctype.h>
  15
  16 /*
  17  * get_control_data()
  18  *
  19  * gets pg_control information in "ctrl". Assumes that bindir and
  20  * datadir are valid absolute paths to postgresql bin and pgdata
  21  * directories respectively *and* pg_resetwal is version compatible
  22  * with datadir. The main purpose of this function is to get pg_control
  23  * data in a version independent manner.
  24  *
  25  * The approach taken here is to invoke pg_resetwal with -n option
  26  * and then pipe its output. With little string parsing we get the
  27  * pg_control data.  pg_resetwal cannot be run while the server is running
  28  * so we use pg_controldata;  pg_controldata doesn't provide all the fields
  29  * we need to actually perform the upgrade, but it provides enough for
  30  * check mode.  We do not implement pg_resetwal -n because it is hard to
  31  * return valid xid data for a running server.
  32  */
  33 void
  34 get_control_data(ClusterInfo *cluster, bool live_check)
  35 {
  36         char            cmd[MAXPGPATH];
  37         char            bufin[MAX_STRING];
  38         FILE       *output;
  39         char       *p;
  40         bool            got_tli = false;
  41         bool            got_log_id = false;
  42         bool            got_log_seg = false;
  43         bool            got_xid = false;
  44         bool            got_oid = false;
  45         bool            got_multi = false;
  46         bool            got_oldestmulti = false;
  47         bool            got_mxoff = false;
  48         bool            got_nextxlogfile = false;
  49         bool            got_float8_pass_by_value = false;
  50         bool            got_align = false;
  51         bool            got_blocksz = false;
  52         bool            got_largesz = false;
  53         bool            got_walsz = false;
  54         bool            got_walseg = false;
  55         bool            got_ident = false;
  56         bool            got_index = false;
  57         bool            got_toast = false;
  58         bool            got_large_object = false;
  59         bool            got_date_is_int = false;
  60         bool            got_data_checksum_version = false;
  61         bool            got_cluster_state = false;
  62         char       *lc_collate = NULL;
  63         char       *lc_ctype = NULL;
  64         char       *lc_monetary = NULL;
  65         char       *lc_numeric = NULL;
  66         char       *lc_time = NULL;
  67         char       *lang = NULL;
  68         char       *language = NULL;
  69         char       *lc_all = NULL;
  70         char       *lc_messages = NULL;
  71         uint32          tli = 0;
  72         uint32          logid = 0;
  73         uint32          segno = 0;
  74         char       *resetwal_bin;
  75
  76
  77         /*
  78          * Because we test the pg_resetwal output as strings, it has to be in
  79          * English.  Copied from pg_regress.c.
  80          */
  81         if (getenv("LC_COLLATE"))
  82                 lc_collate = pg_strdup(getenv("LC_COLLATE"));
  83         if (getenv("LC_CTYPE"))
  84                 lc_ctype = pg_strdup(getenv("LC_CTYPE"));
  85         if (getenv("LC_MONETARY"))
  86                 lc_monetary = pg_strdup(getenv("LC_MONETARY"));
  87         if (getenv("LC_NUMERIC"))
  88                 lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
  89         if (getenv("LC_TIME"))
  90                 lc_time = pg_strdup(getenv("LC_TIME"));
  91         if (getenv("LANG"))
  92                 lang = pg_strdup(getenv("LANG"));
  93         if (getenv("LANGUAGE"))
  94                 language = pg_strdup(getenv("LANGUAGE"));
  95         if (getenv("LC_ALL"))
  96                 lc_all = pg_strdup(getenv("LC_ALL"));
  97         if (getenv("LC_MESSAGES"))
  98                 lc_messages = pg_strdup(getenv("LC_MESSAGES"));
  99
 100         pg_putenv("LC_COLLATE", NULL);
 101         pg_putenv("LC_CTYPE", NULL);
 102         pg_putenv("LC_MONETARY", NULL);
 103         pg_putenv("LC_NUMERIC", NULL);
 104         pg_putenv("LC_TIME", NULL);
 105 #ifndef WIN32
 106         pg_putenv("LANG", NULL);
 107 #else
 108         /* On Windows the default locale cannot be English, so force it */
 109         pg_putenv("LANG", "en");
 110 #endif
 111         pg_putenv("LANGUAGE", NULL);
 112         pg_putenv("LC_ALL", NULL);
 113         pg_putenv("LC_MESSAGES", "C");
 114
 115         /*
 116          * Check for clean shutdown
 117          */
 118         if (!live_check || cluster == &new_cluster)
 119         {
 120                 /* only pg_controldata outputs the cluster state */
 121                 snprintf(cmd, sizeof(cmd), "\"%s/pg_controldata\" \"%s\"",
 122                                  cluster->bindir, cluster->pgdata);
 123                 fflush(stdout);
 124                 fflush(stderr);
 125
 126                 if ((output = popen(cmd, "r")) == NULL)
 127                         pg_fatal("could not get control data using %s: %s\n",
 128                                          cmd, strerror(errno));
 129
 130                 /* we have the result of cmd in "output". so parse it line by line now */
 131                 while (fgets(bufin, sizeof(bufin), output))
 132                 {
 133                         if ((p = strstr(bufin, "Database cluster state:")) != NULL)
 134                         {
 135                                 p = strchr(p, ':');
 136
 137                                 if (p == NULL || strlen(p) <= 1)
 138                                         pg_fatal("%d: database cluster state problem\n", __LINE__);
 139
 140                                 p++;                    /* remove ':' char */
 141
 142                                 /*
 143                                  * We checked earlier for a postmaster lock file, and if we
 144                                  * found one, we tried to start/stop the server to replay the
 145                                  * WAL.  However, pg_ctl -m immediate doesn't leave a lock
 146                                  * file, but does require WAL replay, so we check here that
 147                                  * the server was shut down cleanly, from the controldata
 148                                  * perspective.
 149                                  */
 150                                 /* remove leading spaces */
 151                                 while (*p == ' ')
 152                                         p++;
 153                                 if (strcmp(p, "shut down in recovery\n") == 0)
 154                                 {
 155                                         if (cluster == &old_cluster)
 156                                                 pg_fatal("The source cluster was shut down while in recovery mode.  To upgrade, use \"rsync\" as documented or shut it down as a primary.\n");
 157                                         else
 158                                                 pg_fatal("The target cluster was shut down while in recovery mode.  To upgrade, use \"rsync\" as documented or shut it down as a primary.\n");
 159                                 }
 160                                 else if (strcmp(p, "shut down\n") != 0)
 161                                 {
 162                                         if (cluster == &old_cluster)
 163                                                 pg_fatal("The source cluster was not shut down cleanly.\n");
 164                                         else
 165                                                 pg_fatal("The target cluster was not shut down cleanly.\n");
 166                                 }
 167                                 got_cluster_state = true;
 168                         }
 169                 }
 170
 171                 pclose(output);
 172
 173                 if (!got_cluster_state)
 174                 {
 175                         if (cluster == &old_cluster)
 176                                 pg_fatal("The source cluster lacks cluster state information:\n");
 177                         else
 178                                 pg_fatal("The target cluster lacks cluster state information:\n");
 179                 }
 180         }
 181
 182         /* pg_resetxlog has been renamed to pg_resetwal in version 10 */
 183         if (GET_MAJOR_VERSION(cluster->bin_version) < 1000)
 184                 resetwal_bin = "pg_resetxlog\" -n";
 185         else
 186                 resetwal_bin = "pg_resetwal\" -n";
 187         snprintf(cmd, sizeof(cmd), "\"%s/%s \"%s\"",
 188                          cluster->bindir,
 189                          live_check ? "pg_controldata\"" : resetwal_bin,
 190                          cluster->pgdata);
 191         fflush(stdout);
 192         fflush(stderr);
 193
 194         if ((output = popen(cmd, "r")) == NULL)
 195                 pg_fatal("could not get control data using %s: %s\n",
 196                                  cmd, strerror(errno));
 197
 198         /* Only in <= 9.2 */
 199         if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 200         {
 201                 cluster->controldata.data_checksum_version = 0;
 202                 got_data_checksum_version = true;
 203         }
 204
 205         /* we have the result of cmd in "output". so parse it line by line now */
 206         while (fgets(bufin, sizeof(bufin), output))
 207         {
 208                 pg_log(PG_VERBOSE, "%s", bufin);
 209
 210                 if ((p = strstr(bufin, "pg_control version number:")) != NULL)
 211                 {
 212                         p = strchr(p, ':');
 213
 214                         if (p == NULL || strlen(p) <= 1)
 215                                 pg_fatal("%d: pg_resetwal problem\n", __LINE__);
 216
 217                         p++;                            /* remove ':' char */
 218                         cluster->controldata.ctrl_ver = str2uint(p);
 219                 }
 220                 else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
 221                 {
 222                         p = strchr(p, ':');
 223
 224                         if (p == NULL || strlen(p) <= 1)
 225                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 226
 227                         p++;                            /* remove ':' char */
 228                         cluster->controldata.cat_ver = str2uint(p);
 229                 }
 230                 else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
 231                 {
 232                         p = strchr(p, ':');
 233
 234                         if (p == NULL || strlen(p) <= 1)
 235                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 236
 237                         p++;                            /* remove ':' char */
 238                         tli = str2uint(p);
 239                         got_tli = true;
 240                 }
 241                 else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
 242                 {
 243                         p = strchr(p, ':');
 244
 245                         if (p == NULL || strlen(p) <= 1)
 246                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 247
 248                         p++;                            /* remove ':' char */
 249                         logid = str2uint(p);
 250                         got_log_id = true;
 251                 }
 252                 else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
 253                 {
 254                         p = strchr(p, ':');
 255
 256                         if (p == NULL || strlen(p) <= 1)
 257                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 258
 259                         p++;                            /* remove ':' char */
 260                         segno = str2uint(p);
 261                         got_log_seg = true;
 262                 }
 263                 else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
 264                 {
 265                         p = strchr(p, ':');
 266
 267                         if (p == NULL || strlen(p) <= 1)
 268                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 269
 270                         p++;                            /* remove ':' char */
 271                         cluster->controldata.chkpnt_nxtepoch = str2uint(p);
 272
 273                         /*
 274                          * Delimiter changed from '/' to ':' in 9.6.  We don't test for
 275                          * the catalog version of the change because the catalog version
 276                          * is pulled from pg_controldata too, and it isn't worth adding an
 277                          * order dependency for this --- we just check the string.
 278                          */
 279                         if (strchr(p, '/') != NULL)
 280                                 p = strchr(p, '/');
 281                         else if (GET_MAJOR_VERSION(cluster->major_version) >= 906)
 282                                 p = strchr(p, ':');
 283                         else
 284                                 p = NULL;
 285
 286                         if (p == NULL || strlen(p) <= 1)
 287                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 288
 289                         p++;                            /* remove '/' or ':' char */
 290                         cluster->controldata.chkpnt_nxtxid = str2uint(p);
 291                         got_xid = true;
 292                 }
 293                 else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
 294                 {
 295                         p = strchr(p, ':');
 296
 297                         if (p == NULL || strlen(p) <= 1)
 298                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 299
 300                         p++;                            /* remove ':' char */
 301                         cluster->controldata.chkpnt_nxtoid = str2uint(p);
 302                         got_oid = true;
 303                 }
 304                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
 305                 {
 306                         p = strchr(p, ':');
 307
 308                         if (p == NULL || strlen(p) <= 1)
 309                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 310
 311                         p++;                            /* remove ':' char */
 312                         cluster->controldata.chkpnt_nxtmulti = str2uint(p);
 313                         got_multi = true;
 314                 }
 315                 else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
 316                 {
 317                         p = strchr(p, ':');
 318
 319                         if (p == NULL || strlen(p) <= 1)
 320                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 321
 322                         p++;                            /* remove ':' char */
 323                         cluster->controldata.chkpnt_oldstMulti = str2uint(p);
 324                         got_oldestmulti = true;
 325                 }
 326                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
 327                 {
 328                         p = strchr(p, ':');
 329
 330                         if (p == NULL || strlen(p) <= 1)
 331                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 332
 333                         p++;                            /* remove ':' char */
 334                         cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
 335                         got_mxoff = true;
 336                 }
 337                 else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
 338                 {
 339                         /* Skip the colon and any whitespace after it */
 340                         p = strchr(p, ':');
 341                         if (p == NULL || strlen(p) <= 1)
 342                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 343                         p = strpbrk(p, "01234567890ABCDEF");
 344                         if (p == NULL || strlen(p) <= 1)
 345                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 346
 347                         /* Make sure it looks like a valid WAL file name */
 348                         if (strspn(p, "0123456789ABCDEF") != 24)
 349                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 350
 351                         strlcpy(cluster->controldata.nextxlogfile, p, 25);
 352                         got_nextxlogfile = true;
 353                 }
 354                 else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
 355                 {
 356                         p = strchr(p, ':');
 357
 358                         if (p == NULL || strlen(p) <= 1)
 359                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 360
 361                         p++;                            /* remove ':' char */
 362                         /* used later for contrib check */
 363                         cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
 364                         got_float8_pass_by_value = true;
 365                 }
 366                 else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
 367                 {
 368                         p = strchr(p, ':');
 369
 370                         if (p == NULL || strlen(p) <= 1)
 371                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 372
 373                         p++;                            /* remove ':' char */
 374                         cluster->controldata.align = str2uint(p);
 375                         got_align = true;
 376                 }
 377                 else if ((p = strstr(bufin, "Database block size:")) != NULL)
 378                 {
 379                         p = strchr(p, ':');
 380
 381                         if (p == NULL || strlen(p) <= 1)
 382                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 383
 384                         p++;                            /* remove ':' char */
 385                         cluster->controldata.blocksz = str2uint(p);
 386                         got_blocksz = true;
 387                 }
 388                 else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
 389                 {
 390                         p = strchr(p, ':');
 391
 392                         if (p == NULL || strlen(p) <= 1)
 393                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 394
 395                         p++;                            /* remove ':' char */
 396                         cluster->controldata.largesz = str2uint(p);
 397                         got_largesz = true;
 398                 }
 399                 else if ((p = strstr(bufin, "WAL block size:")) != NULL)
 400                 {
 401                         p = strchr(p, ':');
 402
 403                         if (p == NULL || strlen(p) <= 1)
 404                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 405
 406                         p++;                            /* remove ':' char */
 407                         cluster->controldata.walsz = str2uint(p);
 408                         got_walsz = true;
 409                 }
 410                 else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
 411                 {
 412                         p = strchr(p, ':');
 413
 414                         if (p == NULL || strlen(p) <= 1)
 415                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 416
 417                         p++;                            /* remove ':' char */
 418                         cluster->controldata.walseg = str2uint(p);
 419                         got_walseg = true;
 420                 }
 421                 else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
 422                 {
 423                         p = strchr(p, ':');
 424
 425                         if (p == NULL || strlen(p) <= 1)
 426                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 427
 428                         p++;                            /* remove ':' char */
 429                         cluster->controldata.ident = str2uint(p);
 430                         got_ident = true;
 431                 }
 432                 else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
 433                 {
 434                         p = strchr(p, ':');
 435
 436                         if (p == NULL || strlen(p) <= 1)
 437                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 438
 439                         p++;                            /* remove ':' char */
 440                         cluster->controldata.index = str2uint(p);
 441                         got_index = true;
 442                 }
 443                 else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
 444                 {
 445                         p = strchr(p, ':');
 446
 447                         if (p == NULL || strlen(p) <= 1)
 448                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 449
 450                         p++;                            /* remove ':' char */
 451                         cluster->controldata.toast = str2uint(p);
 452                         got_toast = true;
 453                 }
 454                 else if ((p = strstr(bufin, "Size of a large-object chunk:")) != NULL)
 455                 {
 456                         p = strchr(p, ':');
 457
 458                         if (p == NULL || strlen(p) <= 1)
 459                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 460
 461                         p++;                            /* remove ':' char */
 462                         cluster->controldata.large_object = str2uint(p);
 463                         got_large_object = true;
 464                 }
 465                 else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
 466                 {
 467                         p = strchr(p, ':');
 468
 469                         if (p == NULL || strlen(p) <= 1)
 470                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 471
 472                         p++;                            /* remove ':' char */
 473                         cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
 474                         got_date_is_int = true;
 475                 }
 476                 else if ((p = strstr(bufin, "checksum")) != NULL)
 477                 {
 478                         p = strchr(p, ':');
 479
 480                         if (p == NULL || strlen(p) <= 1)
 481                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 482
 483                         p++;                            /* remove ':' char */
 484                         /* used later for contrib check */
 485                         cluster->controldata.data_checksum_version = str2uint(p);
 486                         got_data_checksum_version = true;
 487                 }
 488         }
 489
 490         pclose(output);
 491
 492         /*
 493          * Restore environment variables
 494          */
 495         pg_putenv("LC_COLLATE", lc_collate);
 496         pg_putenv("LC_CTYPE", lc_ctype);
 497         pg_putenv("LC_MONETARY", lc_monetary);
 498         pg_putenv("LC_NUMERIC", lc_numeric);
 499         pg_putenv("LC_TIME", lc_time);
 500         pg_putenv("LANG", lang);
 501         pg_putenv("LANGUAGE", language);
 502         pg_putenv("LC_ALL", lc_all);
 503         pg_putenv("LC_MESSAGES", lc_messages);
 504
 505         pg_free(lc_collate);
 506         pg_free(lc_ctype);
 507         pg_free(lc_monetary);
 508         pg_free(lc_numeric);
 509         pg_free(lc_time);
 510         pg_free(lang);
 511         pg_free(language);
 512         pg_free(lc_all);
 513         pg_free(lc_messages);
 514
 515         /*
 516          * Before 9.3, pg_resetwal reported the xlogid and segno of the first log
 517          * file after reset as separate lines. Starting with 9.3, it reports the
 518          * WAL file name. If the old cluster is older than 9.3, we construct the
 519          * WAL file name from the xlogid and segno.
 520          */
 521         if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 522         {
 523                 if (got_tli && got_log_id && got_log_seg)
 524                 {
 525                         snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
 526                                          tli, logid, segno);
 527                         got_nextxlogfile = true;
 528                 }
 529         }
 530
 531         /* verify that we got all the mandatory pg_control data */
 532         if (!got_xid || !got_oid ||
 533                 !got_multi ||
 534                 (!got_oldestmulti &&
 535                  cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
 536                 !got_mxoff || (!live_check && !got_nextxlogfile) ||
 537                 !got_float8_pass_by_value || !got_align || !got_blocksz ||
 538                 !got_largesz || !got_walsz || !got_walseg || !got_ident ||
 539                 !got_index || !got_toast ||
 540                 (!got_large_object &&
 541                  cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER) ||
 542                 !got_date_is_int || !got_data_checksum_version)
 543         {
 544                 if (cluster == &old_cluster)
 545                         pg_log(PG_REPORT,
 546                                    "The source cluster lacks some required control information:\n");
 547                 else
 548                         pg_log(PG_REPORT,
 549                                    "The target cluster lacks some required control information:\n");
 550
 551                 if (!got_xid)
 552                         pg_log(PG_REPORT, "  checkpoint next XID\n");
 553
 554                 if (!got_oid)
 555                         pg_log(PG_REPORT, "  latest checkpoint next OID\n");
 556
 557                 if (!got_multi)
 558                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactId\n");
 559
 560                 if (!got_oldestmulti &&
 561                         cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
 562                         pg_log(PG_REPORT, "  latest checkpoint oldest MultiXactId\n");
 563
 564                 if (!got_mxoff)
 565                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactOffset\n");
 566
 567                 if (!live_check && !got_nextxlogfile)
 568                         pg_log(PG_REPORT, "  first WAL segment after reset\n");
 569
 570                 if (!got_float8_pass_by_value)
 571                         pg_log(PG_REPORT, "  float8 argument passing method\n");
 572
 573                 if (!got_align)
 574                         pg_log(PG_REPORT, "  maximum alignment\n");
 575
 576                 if (!got_blocksz)
 577                         pg_log(PG_REPORT, "  block size\n");
 578
 579                 if (!got_largesz)
 580                         pg_log(PG_REPORT, "  large relation segment size\n");
 581
 582                 if (!got_walsz)
 583                         pg_log(PG_REPORT, "  WAL block size\n");
 584
 585                 if (!got_walseg)
 586                         pg_log(PG_REPORT, "  WAL segment size\n");
 587
 588                 if (!got_ident)
 589                         pg_log(PG_REPORT, "  maximum identifier length\n");
 590
 591                 if (!got_index)
 592                         pg_log(PG_REPORT, "  maximum number of indexed columns\n");
 593
 594                 if (!got_toast)
 595                         pg_log(PG_REPORT, "  maximum TOAST chunk size\n");
 596
 597                 if (!got_large_object &&
 598                         cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER)
 599                         pg_log(PG_REPORT, "  large-object chunk size\n");
 600
 601                 if (!got_date_is_int)
 602                         pg_log(PG_REPORT, "  dates/times are integers?\n");
 603
 604                 /* value added in Postgres 9.3 */
 605                 if (!got_data_checksum_version)
 606                         pg_log(PG_REPORT, "  data checksum version\n");
 607
 608                 pg_fatal("Cannot continue without required control information, terminating\n");
 609         }
 610 }
 611
 612
 613 /*
 614  * check_control_data()
 615  *
 616  * check to make sure the control data settings are compatible
 617  */
 618 void
 619 check_control_data(ControlData *oldctrl,
 620                                    ControlData *newctrl)
 621 {
 622         if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
 623                 pg_fatal("old and new pg_controldata alignments are invalid or do not match\n"
 624                                  "Likely one cluster is a 32-bit install, the other 64-bit\n");
 625
 626         if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
 627                 pg_fatal("old and new pg_controldata block sizes are invalid or do not match\n");
 628
 629         if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
 630                 pg_fatal("old and new pg_controldata maximum relation segment sizes are invalid or do not match\n");
 631
 632         if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
 633                 pg_fatal("old and new pg_controldata WAL block sizes are invalid or do not match\n");
 634
 635         if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
 636                 pg_fatal("old and new pg_controldata WAL segment sizes are invalid or do not match\n");
 637
 638         if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
 639                 pg_fatal("old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
 640
 641         if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
 642                 pg_fatal("old and new pg_controldata maximum indexed columns are invalid or do not match\n");
 643
 644         if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
 645                 pg_fatal("old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
 646
 647         /* large_object added in 9.5, so it might not exist in the old cluster */
 648         if (oldctrl->large_object != 0 &&
 649                 oldctrl->large_object != newctrl->large_object)
 650                 pg_fatal("old and new pg_controldata large-object chunk sizes are invalid or do not match\n");
 651
 652         if (oldctrl->date_is_int != newctrl->date_is_int)
 653                 pg_fatal("old and new pg_controldata date/time storage types do not match\n");
 654
 655         /*
 656          * float8_pass_by_value does not need to match, but is used in
 657          * check_for_isn_and_int8_passing_mismatch().
 658          */
 659
 660         /*
 661          * We might eventually allow upgrades from checksum to no-checksum
 662          * clusters.
 663          */
 664         if (oldctrl->data_checksum_version == 0 &&
 665                 newctrl->data_checksum_version != 0)
 666                 pg_fatal("old cluster does not use data checksums but the new one does\n");
 667         else if (oldctrl->data_checksum_version != 0 &&
 668                          newctrl->data_checksum_version == 0)
 669                 pg_fatal("old cluster uses data checksums but the new one does not\n");
 670         else if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
 671                 pg_fatal("old and new cluster pg_controldata checksum versions do not match\n");
 672 }
 673
 674
 675 void
 676 disable_old_cluster(void)
 677 {
 678         char            old_path[MAXPGPATH],
 679                                 new_path[MAXPGPATH];
 680
 681         /* rename pg_control so old server cannot be accidentally started */
 682         prep_status("Adding \".old\" suffix to old global/pg_control");
 683
 684         snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
 685         snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
 686         if (pg_mv_file(old_path, new_path) != 0)
 687                 pg_fatal("Unable to rename %s to %s.\n", old_path, new_path);
 688         check_ok();
 689
 690         pg_log(PG_REPORT, "\n"
 691                    "If you want to start the old cluster, you will need to remove\n"
 692                    "the \".old\" suffix from %s/global/pg_control.old.\n"
 693                    "Because \"link\" mode was used, the old cluster cannot be safely\n"
 694                    "started once the new cluster has been started.\n\n", old_cluster.pgdata);
 695 }