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

   1 /*
   2  *      controldata.c
   3  *
   4  *      controldata functions
   5  *
   6  *      Copyright (c) 2010-2017, 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_resetxlog 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_resetxlog with -n option
  26  * and then pipe its output. With little string parsing we get the
  27  * pg_control data.  pg_resetxlog 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_resetxlog -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         char       *lc_collate = NULL;
  62         char       *lc_ctype = NULL;
  63         char       *lc_monetary = NULL;
  64         char       *lc_numeric = NULL;
  65         char       *lc_time = NULL;
  66         char       *lang = NULL;
  67         char       *language = NULL;
  68         char       *lc_all = NULL;
  69         char       *lc_messages = NULL;
  70         uint32          tli = 0;
  71         uint32          logid = 0;
  72         uint32          segno = 0;
  73
  74
  75         /*
  76          * Because we test the pg_resetxlog output as strings, it has to be in
  77          * English.  Copied from pg_regress.c.
  78          */
  79         if (getenv("LC_COLLATE"))
  80                 lc_collate = pg_strdup(getenv("LC_COLLATE"));
  81         if (getenv("LC_CTYPE"))
  82                 lc_ctype = pg_strdup(getenv("LC_CTYPE"));
  83         if (getenv("LC_MONETARY"))
  84                 lc_monetary = pg_strdup(getenv("LC_MONETARY"));
  85         if (getenv("LC_NUMERIC"))
  86                 lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
  87         if (getenv("LC_TIME"))
  88                 lc_time = pg_strdup(getenv("LC_TIME"));
  89         if (getenv("LANG"))
  90                 lang = pg_strdup(getenv("LANG"));
  91         if (getenv("LANGUAGE"))
  92                 language = pg_strdup(getenv("LANGUAGE"));
  93         if (getenv("LC_ALL"))
  94                 lc_all = pg_strdup(getenv("LC_ALL"));
  95         if (getenv("LC_MESSAGES"))
  96                 lc_messages = pg_strdup(getenv("LC_MESSAGES"));
  97
  98         pg_putenv("LC_COLLATE", NULL);
  99         pg_putenv("LC_CTYPE", NULL);
 100         pg_putenv("LC_MONETARY", NULL);
 101         pg_putenv("LC_NUMERIC", NULL);
 102         pg_putenv("LC_TIME", NULL);
 103         pg_putenv("LANG",
 104 #ifndef WIN32
 105                           NULL);
 106 #else
 107         /* On Windows the default locale cannot be English, so force it */
 108                           "en");
 109 #endif
 110         pg_putenv("LANGUAGE", NULL);
 111         pg_putenv("LC_ALL", NULL);
 112         pg_putenv("LC_MESSAGES", "C");
 113
 114         snprintf(cmd, sizeof(cmd), "\"%s/%s \"%s\"",
 115                          cluster->bindir,
 116                          live_check ? "pg_controldata\"" : "pg_resetxlog\" -n",
 117                          cluster->pgdata);
 118         fflush(stdout);
 119         fflush(stderr);
 120
 121         if ((output = popen(cmd, "r")) == NULL)
 122                 pg_fatal("could not get control data using %s: %s\n",
 123                                  cmd, strerror(errno));
 124
 125         /* Only in <= 9.2 */
 126         if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 127         {
 128                 cluster->controldata.data_checksum_version = 0;
 129                 got_data_checksum_version = true;
 130         }
 131
 132         /* we have the result of cmd in "output". so parse it line by line now */
 133         while (fgets(bufin, sizeof(bufin), output))
 134         {
 135                 pg_log(PG_VERBOSE, "%s", bufin);
 136
 137                 if ((p = strstr(bufin, "pg_control version number:")) != NULL)
 138                 {
 139                         p = strchr(p, ':');
 140
 141                         if (p == NULL || strlen(p) <= 1)
 142                                 pg_fatal("%d: pg_resetxlog problem\n", __LINE__);
 143
 144                         p++;                            /* remove ':' char */
 145                         cluster->controldata.ctrl_ver = str2uint(p);
 146                 }
 147                 else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
 148                 {
 149                         p = strchr(p, ':');
 150
 151                         if (p == NULL || strlen(p) <= 1)
 152                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 153
 154                         p++;                            /* remove ':' char */
 155                         cluster->controldata.cat_ver = str2uint(p);
 156                 }
 157                 else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
 158                 {
 159                         p = strchr(p, ':');
 160
 161                         if (p == NULL || strlen(p) <= 1)
 162                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 163
 164                         p++;                            /* remove ':' char */
 165                         tli = str2uint(p);
 166                         got_tli = true;
 167                 }
 168                 else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
 169                 {
 170                         p = strchr(p, ':');
 171
 172                         if (p == NULL || strlen(p) <= 1)
 173                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 174
 175                         p++;                            /* remove ':' char */
 176                         logid = str2uint(p);
 177                         got_log_id = true;
 178                 }
 179                 else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
 180                 {
 181                         p = strchr(p, ':');
 182
 183                         if (p == NULL || strlen(p) <= 1)
 184                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 185
 186                         p++;                            /* remove ':' char */
 187                         segno = str2uint(p);
 188                         got_log_seg = true;
 189                 }
 190                 else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
 191                 {
 192                         p = strchr(p, ':');
 193
 194                         if (p == NULL || strlen(p) <= 1)
 195                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 196
 197                         p++;                            /* remove ':' char */
 198                         cluster->controldata.chkpnt_nxtepoch = str2uint(p);
 199
 200                         /*
 201                          * Delimiter changed from '/' to ':' in 9.6.  We don't test for
 202                          * the catalog version of the change because the catalog version
 203                          * is pulled from pg_controldata too, and it isn't worth adding an
 204                          * order dependency for this --- we just check the string.
 205                          */
 206                         if (strchr(p, '/') != NULL)
 207                                 p = strchr(p, '/');
 208                         else if (GET_MAJOR_VERSION(cluster->major_version) >= 906)
 209                                 p = strchr(p, ':');
 210                         else
 211                                 p = NULL;
 212
 213                         if (p == NULL || strlen(p) <= 1)
 214                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 215
 216                         p++;                            /* remove '/' or ':' char */
 217                         cluster->controldata.chkpnt_nxtxid = str2uint(p);
 218                         got_xid = true;
 219                 }
 220                 else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != 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.chkpnt_nxtoid = str2uint(p);
 229                         got_oid = true;
 230                 }
 231                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
 232                 {
 233                         p = strchr(p, ':');
 234
 235                         if (p == NULL || strlen(p) <= 1)
 236                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 237
 238                         p++;                            /* remove ':' char */
 239                         cluster->controldata.chkpnt_nxtmulti = str2uint(p);
 240                         got_multi = true;
 241                 }
 242                 else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
 243                 {
 244                         p = strchr(p, ':');
 245
 246                         if (p == NULL || strlen(p) <= 1)
 247                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 248
 249                         p++;                            /* remove ':' char */
 250                         cluster->controldata.chkpnt_oldstMulti = str2uint(p);
 251                         got_oldestmulti = true;
 252                 }
 253                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
 254                 {
 255                         p = strchr(p, ':');
 256
 257                         if (p == NULL || strlen(p) <= 1)
 258                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 259
 260                         p++;                            /* remove ':' char */
 261                         cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
 262                         got_mxoff = true;
 263                 }
 264                 else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
 265                 {
 266                         /* Skip the colon and any whitespace after it */
 267                         p = strchr(p, ':');
 268                         if (p == NULL || strlen(p) <= 1)
 269                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 270                         p = strpbrk(p, "01234567890ABCDEF");
 271                         if (p == NULL || strlen(p) <= 1)
 272                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 273
 274                         /* Make sure it looks like a valid WAL file name */
 275                         if (strspn(p, "0123456789ABCDEF") != 24)
 276                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 277
 278                         strlcpy(cluster->controldata.nextxlogfile, p, 25);
 279                         got_nextxlogfile = true;
 280                 }
 281                 else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
 282                 {
 283                         p = strchr(p, ':');
 284
 285                         if (p == NULL || strlen(p) <= 1)
 286                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 287
 288                         p++;                            /* remove ':' char */
 289                         /* used later for contrib check */
 290                         cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
 291                         got_float8_pass_by_value = true;
 292                 }
 293                 else if ((p = strstr(bufin, "Maximum data alignment:")) != 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.align = str2uint(p);
 302                         got_align = true;
 303                 }
 304                 else if ((p = strstr(bufin, "Database block size:")) != 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.blocksz = str2uint(p);
 313                         got_blocksz = true;
 314                 }
 315                 else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != 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.largesz = str2uint(p);
 324                         got_largesz = true;
 325                 }
 326                 else if ((p = strstr(bufin, "WAL block size:")) != 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.walsz = str2uint(p);
 335                         got_walsz = true;
 336                 }
 337                 else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
 338                 {
 339                         p = strchr(p, ':');
 340
 341                         if (p == NULL || strlen(p) <= 1)
 342                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 343
 344                         p++;                            /* remove ':' char */
 345                         cluster->controldata.walseg = str2uint(p);
 346                         got_walseg = true;
 347                 }
 348                 else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
 349                 {
 350                         p = strchr(p, ':');
 351
 352                         if (p == NULL || strlen(p) <= 1)
 353                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 354
 355                         p++;                            /* remove ':' char */
 356                         cluster->controldata.ident = str2uint(p);
 357                         got_ident = true;
 358                 }
 359                 else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
 360                 {
 361                         p = strchr(p, ':');
 362
 363                         if (p == NULL || strlen(p) <= 1)
 364                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 365
 366                         p++;                            /* remove ':' char */
 367                         cluster->controldata.index = str2uint(p);
 368                         got_index = true;
 369                 }
 370                 else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
 371                 {
 372                         p = strchr(p, ':');
 373
 374                         if (p == NULL || strlen(p) <= 1)
 375                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 376
 377                         p++;                            /* remove ':' char */
 378                         cluster->controldata.toast = str2uint(p);
 379                         got_toast = true;
 380                 }
 381                 else if ((p = strstr(bufin, "Size of a large-object chunk:")) != NULL)
 382                 {
 383                         p = strchr(p, ':');
 384
 385                         if (p == NULL || strlen(p) <= 1)
 386                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 387
 388                         p++;                            /* remove ':' char */
 389                         cluster->controldata.large_object = str2uint(p);
 390                         got_large_object = true;
 391                 }
 392                 else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
 393                 {
 394                         p = strchr(p, ':');
 395
 396                         if (p == NULL || strlen(p) <= 1)
 397                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 398
 399                         p++;                            /* remove ':' char */
 400                         cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
 401                         got_date_is_int = true;
 402                 }
 403                 else if ((p = strstr(bufin, "checksum")) != NULL)
 404                 {
 405                         p = strchr(p, ':');
 406
 407                         if (p == NULL || strlen(p) <= 1)
 408                                 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 409
 410                         p++;                            /* remove ':' char */
 411                         /* used later for contrib check */
 412                         cluster->controldata.data_checksum_version = str2uint(p);
 413                         got_data_checksum_version = true;
 414                 }
 415         }
 416
 417         pclose(output);
 418
 419         /*
 420          * Restore environment variables
 421          */
 422         pg_putenv("LC_COLLATE", lc_collate);
 423         pg_putenv("LC_CTYPE", lc_ctype);
 424         pg_putenv("LC_MONETARY", lc_monetary);
 425         pg_putenv("LC_NUMERIC", lc_numeric);
 426         pg_putenv("LC_TIME", lc_time);
 427         pg_putenv("LANG", lang);
 428         pg_putenv("LANGUAGE", language);
 429         pg_putenv("LC_ALL", lc_all);
 430         pg_putenv("LC_MESSAGES", lc_messages);
 431
 432         pg_free(lc_collate);
 433         pg_free(lc_ctype);
 434         pg_free(lc_monetary);
 435         pg_free(lc_numeric);
 436         pg_free(lc_time);
 437         pg_free(lang);
 438         pg_free(language);
 439         pg_free(lc_all);
 440         pg_free(lc_messages);
 441
 442         /*
 443          * Before 9.3, pg_resetxlog reported the xlogid and segno of the first log
 444          * file after reset as separate lines. Starting with 9.3, it reports the
 445          * WAL file name. If the old cluster is older than 9.3, we construct the
 446          * WAL file name from the xlogid and segno.
 447          */
 448         if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 449         {
 450                 if (got_tli && got_log_id && got_log_seg)
 451                 {
 452                         snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
 453                                          tli, logid, segno);
 454                         got_nextxlogfile = true;
 455                 }
 456         }
 457
 458         /* verify that we got all the mandatory pg_control data */
 459         if (!got_xid || !got_oid ||
 460                 !got_multi ||
 461                 (!got_oldestmulti &&
 462                  cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
 463                 !got_mxoff || (!live_check && !got_nextxlogfile) ||
 464                 !got_float8_pass_by_value || !got_align || !got_blocksz ||
 465                 !got_largesz || !got_walsz || !got_walseg || !got_ident ||
 466                 !got_index || !got_toast ||
 467                 (!got_large_object &&
 468                  cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER) ||
 469                 !got_date_is_int || !got_data_checksum_version)
 470         {
 471                 pg_log(PG_REPORT,
 472                            "The %s cluster lacks some required control information:\n",
 473                            CLUSTER_NAME(cluster));
 474
 475                 if (!got_xid)
 476                         pg_log(PG_REPORT, "  checkpoint next XID\n");
 477
 478                 if (!got_oid)
 479                         pg_log(PG_REPORT, "  latest checkpoint next OID\n");
 480
 481                 if (!got_multi)
 482                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactId\n");
 483
 484                 if (!got_oldestmulti &&
 485                         cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
 486                         pg_log(PG_REPORT, "  latest checkpoint oldest MultiXactId\n");
 487
 488                 if (!got_mxoff)
 489                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactOffset\n");
 490
 491                 if (!live_check && !got_nextxlogfile)
 492                         pg_log(PG_REPORT, "  first WAL segment after reset\n");
 493
 494                 if (!got_float8_pass_by_value)
 495                         pg_log(PG_REPORT, "  float8 argument passing method\n");
 496
 497                 if (!got_align)
 498                         pg_log(PG_REPORT, "  maximum alignment\n");
 499
 500                 if (!got_blocksz)
 501                         pg_log(PG_REPORT, "  block size\n");
 502
 503                 if (!got_largesz)
 504                         pg_log(PG_REPORT, "  large relation segment size\n");
 505
 506                 if (!got_walsz)
 507                         pg_log(PG_REPORT, "  WAL block size\n");
 508
 509                 if (!got_walseg)
 510                         pg_log(PG_REPORT, "  WAL segment size\n");
 511
 512                 if (!got_ident)
 513                         pg_log(PG_REPORT, "  maximum identifier length\n");
 514
 515                 if (!got_index)
 516                         pg_log(PG_REPORT, "  maximum number of indexed columns\n");
 517
 518                 if (!got_toast)
 519                         pg_log(PG_REPORT, "  maximum TOAST chunk size\n");
 520
 521                 if (!got_large_object &&
 522                         cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER)
 523                         pg_log(PG_REPORT, "  large-object chunk size\n");
 524
 525                 if (!got_date_is_int)
 526                         pg_log(PG_REPORT, "  dates/times are integers?\n");
 527
 528                 /* value added in Postgres 9.3 */
 529                 if (!got_data_checksum_version)
 530                         pg_log(PG_REPORT, "  data checksum version\n");
 531
 532                 pg_fatal("Cannot continue without required control information, terminating\n");
 533         }
 534 }
 535
 536
 537 /*
 538  * check_control_data()
 539  *
 540  * check to make sure the control data settings are compatible
 541  */
 542 void
 543 check_control_data(ControlData *oldctrl,
 544                                    ControlData *newctrl)
 545 {
 546         if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
 547                 pg_fatal("old and new pg_controldata alignments are invalid or do not match\n"
 548                            "Likely one cluster is a 32-bit install, the other 64-bit\n");
 549
 550         if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
 551                 pg_fatal("old and new pg_controldata block sizes are invalid or do not match\n");
 552
 553         if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
 554                 pg_fatal("old and new pg_controldata maximum relation segment sizes are invalid or do not match\n");
 555
 556         if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
 557                 pg_fatal("old and new pg_controldata WAL block sizes are invalid or do not match\n");
 558
 559         if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
 560                 pg_fatal("old and new pg_controldata WAL segment sizes are invalid or do not match\n");
 561
 562         if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
 563                 pg_fatal("old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
 564
 565         if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
 566                 pg_fatal("old and new pg_controldata maximum indexed columns are invalid or do not match\n");
 567
 568         if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
 569                 pg_fatal("old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
 570
 571         /* large_object added in 9.5, so it might not exist in the old cluster */
 572         if (oldctrl->large_object != 0 &&
 573                 oldctrl->large_object != newctrl->large_object)
 574                 pg_fatal("old and new pg_controldata large-object chunk sizes are invalid or do not match\n");
 575
 576         if (oldctrl->date_is_int != newctrl->date_is_int)
 577                 pg_fatal("old and new pg_controldata date/time storage types do not match\n");
 578
 579         /*
 580          * float8_pass_by_value does not need to match, but is used in
 581          * check_for_isn_and_int8_passing_mismatch().
 582          */
 583
 584         /*
 585          * We might eventually allow upgrades from checksum to no-checksum
 586          * clusters.
 587          */
 588         if (oldctrl->data_checksum_version == 0 &&
 589                 newctrl->data_checksum_version != 0)
 590                 pg_fatal("old cluster does not use data checksums but the new one does\n");
 591         else if (oldctrl->data_checksum_version != 0 &&
 592                          newctrl->data_checksum_version == 0)
 593                 pg_fatal("old cluster uses data checksums but the new one does not\n");
 594         else if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
 595                 pg_fatal("old and new cluster pg_controldata checksum versions do not match\n");
 596 }
 597
 598
 599 void
 600 disable_old_cluster(void)
 601 {
 602         char            old_path[MAXPGPATH],
 603                                 new_path[MAXPGPATH];
 604
 605         /* rename pg_control so old server cannot be accidentally started */
 606         prep_status("Adding \".old\" suffix to old global/pg_control");
 607
 608         snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
 609         snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
 610         if (pg_mv_file(old_path, new_path) != 0)
 611                 pg_fatal("Unable to rename %s to %s.\n", old_path, new_path);
 612         check_ok();
 613
 614         pg_log(PG_REPORT, "\n"
 615                    "If you want to start the old cluster, you will need to remove\n"
 616                    "the \".old\" suffix from %s/global/pg_control.old.\n"
 617                  "Because \"link\" mode was used, the old cluster cannot be safely\n"
 618         "started once the new cluster has been started.\n\n", old_cluster.pgdata);
 619 }