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

   1 /*
   2  *      controldata.c
   3  *
   4  *      controldata functions
   5  *
   6  *      Copyright (c) 2010-2013, PostgreSQL Global Development Group
   7  *      contrib/pg_upgrade/controldata.c
   8  */
   9
  10 #include "postgres.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_xid = false;
  41         bool            got_oid = false;
  42         bool            got_nextxlogfile = false;
  43         bool            got_multi = false;
  44         bool            got_mxoff = false;
  45         bool            got_oldestmulti = false;
  46         bool            got_log_id = false;
  47         bool            got_log_seg = false;
  48         bool            got_tli = false;
  49         bool            got_align = false;
  50         bool            got_blocksz = false;
  51         bool            got_largesz = false;
  52         bool            got_walsz = false;
  53         bool            got_walseg = false;
  54         bool            got_ident = false;
  55         bool            got_index = false;
  56         bool            got_toast = false;
  57         bool            got_date_is_int = false;
  58         bool            got_float8_pass_by_value = false;
  59         char       *lc_collate = NULL;
  60         char       *lc_ctype = NULL;
  61         char       *lc_monetary = NULL;
  62         char       *lc_numeric = NULL;
  63         char       *lc_time = NULL;
  64         char       *lang = NULL;
  65         char       *language = NULL;
  66         char       *lc_all = NULL;
  67         char       *lc_messages = NULL;
  68         uint32          logid = 0;
  69         uint32          segno = 0;
  70         uint32          tli = 0;
  71
  72
  73         /*
  74          * Because we test the pg_resetxlog output as strings, it has to be in
  75          * English.  Copied from pg_regress.c.
  76          */
  77         if (getenv("LC_COLLATE"))
  78                 lc_collate = pg_strdup(getenv("LC_COLLATE"));
  79         if (getenv("LC_CTYPE"))
  80                 lc_ctype = pg_strdup(getenv("LC_CTYPE"));
  81         if (getenv("LC_MONETARY"))
  82                 lc_monetary = pg_strdup(getenv("LC_MONETARY"));
  83         if (getenv("LC_NUMERIC"))
  84                 lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
  85         if (getenv("LC_TIME"))
  86                 lc_time = pg_strdup(getenv("LC_TIME"));
  87         if (getenv("LANG"))
  88                 lang = pg_strdup(getenv("LANG"));
  89         if (getenv("LANGUAGE"))
  90                 language = pg_strdup(getenv("LANGUAGE"));
  91         if (getenv("LC_ALL"))
  92                 lc_all = pg_strdup(getenv("LC_ALL"));
  93         if (getenv("LC_MESSAGES"))
  94                 lc_messages = pg_strdup(getenv("LC_MESSAGES"));
  95
  96         pg_putenv("LC_COLLATE", NULL);
  97         pg_putenv("LC_CTYPE", NULL);
  98         pg_putenv("LC_MONETARY", NULL);
  99         pg_putenv("LC_NUMERIC", NULL);
 100         pg_putenv("LC_TIME", NULL);
 101         pg_putenv("LANG",
 102 #ifndef WIN32
 103                           NULL);
 104 #else
 105         /* On Windows the default locale cannot be English, so force it */
 106                           "en");
 107 #endif
 108         pg_putenv("LANGUAGE", NULL);
 109         pg_putenv("LC_ALL", NULL);
 110         pg_putenv("LC_MESSAGES", "C");
 111
 112         snprintf(cmd, sizeof(cmd), SYSTEMQUOTE "\"%s/%s \"%s\"" SYSTEMQUOTE,
 113                          cluster->bindir,
 114                          live_check ? "pg_controldata\"" : "pg_resetxlog\" -n",
 115                          cluster->pgdata);
 116         fflush(stdout);
 117         fflush(stderr);
 118
 119         if ((output = popen(cmd, "r")) == NULL)
 120                 pg_log(PG_FATAL, "Could not get control data using %s: %s\n",
 121                            cmd, getErrorText(errno));
 122
 123         /* Only pre-8.4 has these so if they are not set below we will check later */
 124         cluster->controldata.lc_collate = NULL;
 125         cluster->controldata.lc_ctype = NULL;
 126
 127         /* Only in <= 8.3 */
 128         if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
 129         {
 130                 cluster->controldata.float8_pass_by_value = false;
 131                 got_float8_pass_by_value = true;
 132         }
 133
 134         /* we have the result of cmd in "output". so parse it line by line now */
 135         while (fgets(bufin, sizeof(bufin), output))
 136         {
 137                 pg_log(PG_VERBOSE, "%s", bufin);
 138
 139 #ifdef WIN32
 140
 141                 /*
 142                  * Due to an installer bug, LANG=C doesn't work for PG 8.3.3, but does
 143                  * work 8.2.6 and 8.3.7, so check for non-ASCII output and suggest a
 144                  * minor upgrade.
 145                  */
 146                 if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
 147                 {
 148                         for (p = bufin; *p; p++)
 149                                 if (!isascii(*p))
 150                                         pg_log(PG_FATAL,
 151                                                    "The 8.3 cluster's pg_controldata is incapable of outputting ASCII, even\n"
 152                                                    "with LANG=C.  You must upgrade this cluster to a newer version of PostgreSQL\n"
 153                                                    "8.3 to fix this bug.  PostgreSQL 8.3.7 and later are known to work properly.\n");
 154                 }
 155 #endif
 156
 157                 if ((p = strstr(bufin, "pg_control version number:")) != NULL)
 158                 {
 159                         p = strchr(p, ':');
 160
 161                         if (p == NULL || strlen(p) <= 1)
 162                                 pg_log(PG_FATAL, "%d: pg_resetxlog problem\n", __LINE__);
 163
 164                         p++;                            /* removing ':' char */
 165                         cluster->controldata.ctrl_ver = str2uint(p);
 166                 }
 167                 else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
 168                 {
 169                         p = strchr(p, ':');
 170
 171                         if (p == NULL || strlen(p) <= 1)
 172                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 173
 174                         p++;                            /* removing ':' char */
 175                         cluster->controldata.cat_ver = str2uint(p);
 176                 }
 177                 else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
 178                 {
 179                         /* Skip the colon and any whitespace after it */
 180                         p = strchr(p, ':');
 181                         if (p == NULL || strlen(p) <= 1)
 182                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 183                         p = strpbrk(p, "01234567890ABCDEF");
 184                         if (p == NULL || strlen(p) <= 1)
 185                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 186
 187                         /* Make sure it looks like a valid WAL file name */
 188                         if (strspn(p, "0123456789ABCDEF") != 24)
 189                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 190
 191                         strlcpy(cluster->controldata.nextxlogfile, p, 25);
 192                         got_nextxlogfile = true;
 193                 }
 194                 else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
 195                 {
 196                         p = strchr(p, ':');
 197
 198                         if (p == NULL || strlen(p) <= 1)
 199                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 200
 201                         p++;                            /* removing ':' char */
 202                         logid = str2uint(p);
 203                         got_log_id = true;
 204                 }
 205                 else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
 206                 {
 207                         p = strchr(p, ':');
 208
 209                         if (p == NULL || strlen(p) <= 1)
 210                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 211
 212                         p++;                            /* removing ':' char */
 213                         segno = str2uint(p);
 214                         got_log_seg = true;
 215                 }
 216                 else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
 217                 {
 218                         p = strchr(p, ':');
 219
 220                         if (p == NULL || strlen(p) <= 1)
 221                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 222
 223                         p++;                            /* removing ':' char */
 224                         cluster->controldata.chkpnt_tli = str2uint(p);
 225                         got_tli = true;
 226                 }
 227                 else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
 228                 {
 229                         char       *op = strchr(p, '/');
 230
 231                         if (op == NULL)
 232                                 op = strchr(p, ':');
 233
 234                         if (op == NULL || strlen(op) <= 1)
 235                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 236
 237                         op++;                           /* removing ':' char */
 238                         cluster->controldata.chkpnt_nxtxid = str2uint(op);
 239                         got_xid = true;
 240                 }
 241                 else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
 242                 {
 243                         p = strchr(p, ':');
 244
 245                         if (p == NULL || strlen(p) <= 1)
 246                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 247
 248                         p++;                            /* removing ':' char */
 249                         cluster->controldata.chkpnt_nxtoid = str2uint(p);
 250                         got_oid = true;
 251                 }
 252                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
 253                 {
 254                         p = strchr(p, ':');
 255
 256                         if (p == NULL || strlen(p) <= 1)
 257                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 258
 259                         p++;                            /* removing ':' char */
 260                         cluster->controldata.chkpnt_nxtmulti = str2uint(p);
 261                         got_multi = true;
 262                 }
 263                 else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
 264                 {
 265                         p = strchr(p, ':');
 266
 267                         if (p == NULL || strlen(p) <= 1)
 268                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 269
 270                         p++;                            /* removing ':' char */
 271                         cluster->controldata.chkpnt_oldstMulti = str2uint(p);
 272                         got_oldestmulti = true;
 273                 }
 274                 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
 275                 {
 276                         p = strchr(p, ':');
 277
 278                         if (p == NULL || strlen(p) <= 1)
 279                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 280
 281                         p++;                            /* removing ':' char */
 282                         cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
 283                         got_mxoff = true;
 284                 }
 285                 else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
 286                 {
 287                         p = strchr(p, ':');
 288
 289                         if (p == NULL || strlen(p) <= 1)
 290                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 291
 292                         p++;                            /* removing ':' char */
 293                         cluster->controldata.align = str2uint(p);
 294                         got_align = true;
 295                 }
 296                 else if ((p = strstr(bufin, "Database block size:")) != NULL)
 297                 {
 298                         p = strchr(p, ':');
 299
 300                         if (p == NULL || strlen(p) <= 1)
 301                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 302
 303                         p++;                            /* removing ':' char */
 304                         cluster->controldata.blocksz = str2uint(p);
 305                         got_blocksz = true;
 306                 }
 307                 else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
 308                 {
 309                         p = strchr(p, ':');
 310
 311                         if (p == NULL || strlen(p) <= 1)
 312                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 313
 314                         p++;                            /* removing ':' char */
 315                         cluster->controldata.largesz = str2uint(p);
 316                         got_largesz = true;
 317                 }
 318                 else if ((p = strstr(bufin, "WAL block size:")) != NULL)
 319                 {
 320                         p = strchr(p, ':');
 321
 322                         if (p == NULL || strlen(p) <= 1)
 323                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 324
 325                         p++;                            /* removing ':' char */
 326                         cluster->controldata.walsz = str2uint(p);
 327                         got_walsz = true;
 328                 }
 329                 else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
 330                 {
 331                         p = strchr(p, ':');
 332
 333                         if (p == NULL || strlen(p) <= 1)
 334                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 335
 336                         p++;                            /* removing ':' char */
 337                         cluster->controldata.walseg = str2uint(p);
 338                         got_walseg = true;
 339                 }
 340                 else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
 341                 {
 342                         p = strchr(p, ':');
 343
 344                         if (p == NULL || strlen(p) <= 1)
 345                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 346
 347                         p++;                            /* removing ':' char */
 348                         cluster->controldata.ident = str2uint(p);
 349                         got_ident = true;
 350                 }
 351                 else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
 352                 {
 353                         p = strchr(p, ':');
 354
 355                         if (p == NULL || strlen(p) <= 1)
 356                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 357
 358                         p++;                            /* removing ':' char */
 359                         cluster->controldata.index = str2uint(p);
 360                         got_index = true;
 361                 }
 362                 else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
 363                 {
 364                         p = strchr(p, ':');
 365
 366                         if (p == NULL || strlen(p) <= 1)
 367                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 368
 369                         p++;                            /* removing ':' char */
 370                         cluster->controldata.toast = str2uint(p);
 371                         got_toast = true;
 372                 }
 373                 else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
 374                 {
 375                         p = strchr(p, ':');
 376
 377                         if (p == NULL || strlen(p) <= 1)
 378                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 379
 380                         p++;                            /* removing ':' char */
 381                         cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
 382                         got_date_is_int = true;
 383                 }
 384                 else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
 385                 {
 386                         p = strchr(p, ':');
 387
 388                         if (p == NULL || strlen(p) <= 1)
 389                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 390
 391                         p++;                            /* removing ':' char */
 392                         /* used later for contrib check */
 393                         cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
 394                         got_float8_pass_by_value = true;
 395                 }
 396                 /* In pre-8.4 only */
 397                 else if ((p = strstr(bufin, "LC_COLLATE:")) != NULL)
 398                 {
 399                         p = strchr(p, ':');
 400
 401                         if (p == NULL || strlen(p) <= 1)
 402                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 403
 404                         p++;                            /* removing ':' char */
 405                         /* skip leading spaces and remove trailing newline */
 406                         p += strspn(p, " ");
 407                         if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
 408                                 *(p + strlen(p) - 1) = '\0';
 409                         cluster->controldata.lc_collate = pg_strdup(p);
 410                 }
 411                 /* In pre-8.4 only */
 412                 else if ((p = strstr(bufin, "LC_CTYPE:")) != NULL)
 413                 {
 414                         p = strchr(p, ':');
 415
 416                         if (p == NULL || strlen(p) <= 1)
 417                                 pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
 418
 419                         p++;                            /* removing ':' char */
 420                         /* skip leading spaces and remove trailing newline */
 421                         p += strspn(p, " ");
 422                         if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
 423                                 *(p + strlen(p) - 1) = '\0';
 424                         cluster->controldata.lc_ctype = pg_strdup(p);
 425                 }
 426         }
 427
 428         if (output)
 429                 pclose(output);
 430
 431         /*
 432          * Restore environment variables
 433          */
 434         pg_putenv("LC_COLLATE", lc_collate);
 435         pg_putenv("LC_CTYPE", lc_ctype);
 436         pg_putenv("LC_MONETARY", lc_monetary);
 437         pg_putenv("LC_NUMERIC", lc_numeric);
 438         pg_putenv("LC_TIME", lc_time);
 439         pg_putenv("LANG", lang);
 440         pg_putenv("LANGUAGE", language);
 441         pg_putenv("LC_ALL", lc_all);
 442         pg_putenv("LC_MESSAGES", lc_messages);
 443
 444         pg_free(lc_collate);
 445         pg_free(lc_ctype);
 446         pg_free(lc_monetary);
 447         pg_free(lc_numeric);
 448         pg_free(lc_time);
 449         pg_free(lang);
 450         pg_free(language);
 451         pg_free(lc_all);
 452         pg_free(lc_messages);
 453
 454         /*
 455          * Before 9.3, pg_resetxlog reported the xlogid and segno of the first
 456          * log file after reset as separate lines. Starting with 9.3, it reports
 457          * the WAL file name. If the old cluster is older than 9.3, we construct
 458          * the WAL file name from the xlogid and segno.
 459          */
 460         if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 461         {
 462                 if (got_log_id && got_log_seg)
 463                 {
 464                         snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
 465                                          tli, logid, segno);
 466                         got_nextxlogfile = true;
 467                 }
 468         }
 469
 470         /* verify that we got all the mandatory pg_control data */
 471         if (!got_xid || !got_oid ||
 472                 !got_multi || !got_mxoff || !got_oldestmulti ||
 473                 (!live_check && !got_nextxlogfile) ||
 474                 !got_tli ||
 475                 !got_align || !got_blocksz || !got_largesz || !got_walsz ||
 476                 !got_walseg || !got_ident || !got_index || !got_toast ||
 477                 !got_date_is_int || !got_float8_pass_by_value)
 478         {
 479                 pg_log(PG_REPORT,
 480                         "The %s cluster lacks some required control information:\n",
 481                         CLUSTER_NAME(cluster));
 482
 483                 if (!got_xid)
 484                         pg_log(PG_REPORT, "  checkpoint next XID\n");
 485
 486                 if (!got_oid)
 487                         pg_log(PG_REPORT, "  latest checkpoint next OID\n");
 488
 489                 if (!got_multi)
 490                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactId\n");
 491
 492                 if (!got_mxoff)
 493                         pg_log(PG_REPORT, "  latest checkpoint next MultiXactOffset\n");
 494
 495                 if (!got_oldestmulti)
 496                         pg_log(PG_REPORT, "  latest checkpoint oldest MultiXactId\n");
 497
 498                 if (!live_check && !got_nextxlogfile)
 499                         pg_log(PG_REPORT, "  first WAL segment after reset\n");
 500
 501                 if (!got_tli)
 502                         pg_log(PG_REPORT, "  latest checkpoint timeline ID\n");
 503
 504                 if (!got_align)
 505                         pg_log(PG_REPORT, "  maximum alignment\n");
 506
 507                 if (!got_blocksz)
 508                         pg_log(PG_REPORT, "  block size\n");
 509
 510                 if (!got_largesz)
 511                         pg_log(PG_REPORT, "  large relation segment size\n");
 512
 513                 if (!got_walsz)
 514                         pg_log(PG_REPORT, "  WAL block size\n");
 515
 516                 if (!got_walseg)
 517                         pg_log(PG_REPORT, "  WAL segment size\n");
 518
 519                 if (!got_ident)
 520                         pg_log(PG_REPORT, "  maximum identifier length\n");
 521
 522                 if (!got_index)
 523                         pg_log(PG_REPORT, "  maximum number of indexed columns\n");
 524
 525                 if (!got_toast)
 526                         pg_log(PG_REPORT, "  maximum TOAST chunk size\n");
 527
 528                 if (!got_date_is_int)
 529                         pg_log(PG_REPORT, "  dates/times are integers?\n");
 530
 531                 /* value added in Postgres 8.4 */
 532                 if (!got_float8_pass_by_value)
 533                         pg_log(PG_REPORT, "  float8 argument passing method\n");
 534
 535                 pg_log(PG_FATAL,
 536                            "Cannot continue without required control information, terminating\n");
 537         }
 538 }
 539
 540
 541 /*
 542  * check_control_data()
 543  *
 544  * check to make sure the control data settings are compatible
 545  */
 546 void
 547 check_control_data(ControlData *oldctrl,
 548                                    ControlData *newctrl)
 549 {
 550         if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
 551                 pg_log(PG_FATAL,
 552                            "old and new pg_controldata alignments are invalid or do not match\n"
 553                            "Likely one cluster is a 32-bit install, the other 64-bit\n");
 554
 555         if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
 556                 pg_log(PG_FATAL,
 557                            "old and new pg_controldata block sizes are invalid or do not match\n");
 558
 559         if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
 560                 pg_log(PG_FATAL,
 561                            "old and new pg_controldata maximum relation segement sizes are invalid or do not match\n");
 562
 563         if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
 564                 pg_log(PG_FATAL,
 565                            "old and new pg_controldata WAL block sizes are invalid or do not match\n");
 566
 567         if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
 568                 pg_log(PG_FATAL,
 569                            "old and new pg_controldata WAL segment sizes are invalid or do not match\n");
 570
 571         if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
 572                 pg_log(PG_FATAL,
 573                            "old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
 574
 575         if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
 576                 pg_log(PG_FATAL,
 577                            "old and new pg_controldata maximum indexed columns are invalid or do not match\n");
 578
 579         if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
 580                 pg_log(PG_FATAL,
 581                            "old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
 582
 583         if (oldctrl->date_is_int != newctrl->date_is_int)
 584         {
 585                 pg_log(PG_WARNING,
 586                            "\nOld and new pg_controldata date/time storage types do not match.\n");
 587
 588                 /*
 589                  * This is a common 8.3 -> 8.4 upgrade problem, so we are more verbose
 590                  */
 591                 pg_log(PG_FATAL,
 592                         "You will need to rebuild the new server with configure option\n"
 593                            "--disable-integer-datetimes or get server binaries built with those\n"
 594                            "options.\n");
 595         }
 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_log(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 }