1 /*
2 * controldata.c
3 *
4 * controldata functions
5 *
6 * Copyright (c) 2010-2021, PostgreSQL Global Development Group
7 * src/bin/pg_upgrade/controldata.c
8 */
9
10 #include "postgres_fe.h"
11
12 #include <ctype.h>
13
14 #include "pg_upgrade.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
get_control_data(ClusterInfo * cluster,bool live_check)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_oldestxid = false;
48 bool got_mxoff = false;
49 bool got_nextxlogfile = false;
50 bool got_float8_pass_by_value = false;
51 bool got_align = false;
52 bool got_blocksz = false;
53 bool got_largesz = false;
54 bool got_walsz = false;
55 bool got_walseg = false;
56 bool got_ident = false;
57 bool got_index = false;
58 bool got_toast = false;
59 bool got_large_object = false;
60 bool got_date_is_int = false;
61 bool got_data_checksum_version = false;
62 bool got_cluster_state = false;
63 char *lc_collate = NULL;
64 char *lc_ctype = NULL;
65 char *lc_monetary = NULL;
66 char *lc_numeric = NULL;
67 char *lc_time = NULL;
68 char *lang = NULL;
69 char *language = NULL;
70 char *lc_all = NULL;
71 char *lc_messages = NULL;
72 uint32 tli = 0;
73 uint32 logid = 0;
74 uint32 segno = 0;
75 char *resetwal_bin;
76
77
78 /*
79 * Because we test the pg_resetwal output as strings, it has to be in
80 * English. Copied from pg_regress.c.
81 */
82 if (getenv("LC_COLLATE"))
83 lc_collate = pg_strdup(getenv("LC_COLLATE"));
84 if (getenv("LC_CTYPE"))
85 lc_ctype = pg_strdup(getenv("LC_CTYPE"));
86 if (getenv("LC_MONETARY"))
87 lc_monetary = pg_strdup(getenv("LC_MONETARY"));
88 if (getenv("LC_NUMERIC"))
89 lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
90 if (getenv("LC_TIME"))
91 lc_time = pg_strdup(getenv("LC_TIME"));
92 if (getenv("LANG"))
93 lang = pg_strdup(getenv("LANG"));
94 if (getenv("LANGUAGE"))
95 language = pg_strdup(getenv("LANGUAGE"));
96 if (getenv("LC_ALL"))
97 lc_all = pg_strdup(getenv("LC_ALL"));
98 if (getenv("LC_MESSAGES"))
99 lc_messages = pg_strdup(getenv("LC_MESSAGES"));
100
101 unsetenv("LC_COLLATE");
102 unsetenv("LC_CTYPE");
103 unsetenv("LC_MONETARY");
104 unsetenv("LC_NUMERIC");
105 unsetenv("LC_TIME");
106 #ifndef WIN32
107 unsetenv("LANG");
108 #else
109 /* On Windows the default locale may not be English, so force it */
110 setenv("LANG", "en", 1);
111 #endif
112 unsetenv("LANGUAGE");
113 unsetenv("LC_ALL");
114 setenv("LC_MESSAGES", "C", 1);
115
116 /*
117 * Check for clean shutdown
118 */
119 if (!live_check || cluster == &new_cluster)
120 {
121 /* only pg_controldata outputs the cluster state */
122 snprintf(cmd, sizeof(cmd), "\"%s/pg_controldata\" \"%s\"",
123 cluster->bindir, cluster->pgdata);
124 fflush(stdout);
125 fflush(stderr);
126
127 if ((output = popen(cmd, "r")) == NULL)
128 pg_fatal("could not get control data using %s: %s\n",
129 cmd, strerror(errno));
130
131 /* we have the result of cmd in "output". so parse it line by line now */
132 while (fgets(bufin, sizeof(bufin), output))
133 {
134 if ((p = strstr(bufin, "Database cluster state:")) != NULL)
135 {
136 p = strchr(p, ':');
137
138 if (p == NULL || strlen(p) <= 1)
139 pg_fatal("%d: database cluster state problem\n", __LINE__);
140
141 p++; /* remove ':' char */
142
143 /*
144 * We checked earlier for a postmaster lock file, and if we
145 * found one, we tried to start/stop the server to replay the
146 * WAL. However, pg_ctl -m immediate doesn't leave a lock
147 * file, but does require WAL replay, so we check here that
148 * the server was shut down cleanly, from the controldata
149 * perspective.
150 */
151 /* remove leading spaces */
152 while (*p == ' ')
153 p++;
154 if (strcmp(p, "shut down in recovery\n") == 0)
155 {
156 if (cluster == &old_cluster)
157 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");
158 else
159 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");
160 }
161 else if (strcmp(p, "shut down\n") != 0)
162 {
163 if (cluster == &old_cluster)
164 pg_fatal("The source cluster was not shut down cleanly.\n");
165 else
166 pg_fatal("The target cluster was not shut down cleanly.\n");
167 }
168 got_cluster_state = true;
169 }
170 }
171
172 pclose(output);
173
174 if (!got_cluster_state)
175 {
176 if (cluster == &old_cluster)
177 pg_fatal("The source cluster lacks cluster state information:\n");
178 else
179 pg_fatal("The target cluster lacks cluster state information:\n");
180 }
181 }
182
183 /* pg_resetxlog has been renamed to pg_resetwal in version 10 */
184 if (GET_MAJOR_VERSION(cluster->bin_version) <= 906)
185 resetwal_bin = "pg_resetxlog\" -n";
186 else
187 resetwal_bin = "pg_resetwal\" -n";
188 snprintf(cmd, sizeof(cmd), "\"%s/%s \"%s\"",
189 cluster->bindir,
190 live_check ? "pg_controldata\"" : resetwal_bin,
191 cluster->pgdata);
192 fflush(stdout);
193 fflush(stderr);
194
195 if ((output = popen(cmd, "r")) == NULL)
196 pg_fatal("could not get control data using %s: %s\n",
197 cmd, strerror(errno));
198
199 /* Only in <= 9.2 */
200 if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
201 {
202 cluster->controldata.data_checksum_version = 0;
203 got_data_checksum_version = true;
204 }
205
206 /* we have the result of cmd in "output". so parse it line by line now */
207 while (fgets(bufin, sizeof(bufin), output))
208 {
209 pg_log(PG_VERBOSE, "%s", bufin);
210
211 if ((p = strstr(bufin, "pg_control version number:")) != NULL)
212 {
213 p = strchr(p, ':');
214
215 if (p == NULL || strlen(p) <= 1)
216 pg_fatal("%d: pg_resetwal problem\n", __LINE__);
217
218 p++; /* remove ':' char */
219 cluster->controldata.ctrl_ver = str2uint(p);
220 }
221 else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
222 {
223 p = strchr(p, ':');
224
225 if (p == NULL || strlen(p) <= 1)
226 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
227
228 p++; /* remove ':' char */
229 cluster->controldata.cat_ver = str2uint(p);
230 }
231 else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != 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 tli = str2uint(p);
240 got_tli = true;
241 }
242 else if ((p = strstr(bufin, "First log file ID after reset:")) != 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 logid = str2uint(p);
251 got_log_id = true;
252 }
253 else if ((p = strstr(bufin, "First log file segment after reset:")) != 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 segno = str2uint(p);
262 got_log_seg = true;
263 }
264 else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
265 {
266 p = strchr(p, ':');
267
268 if (p == NULL || strlen(p) <= 1)
269 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
270
271 p++; /* remove ':' char */
272 cluster->controldata.chkpnt_nxtepoch = str2uint(p);
273
274 /*
275 * Delimiter changed from '/' to ':' in 9.6. We don't test for
276 * the catalog version of the change because the catalog version
277 * is pulled from pg_controldata too, and it isn't worth adding an
278 * order dependency for this --- we just check the string.
279 */
280 if (strchr(p, '/') != NULL)
281 p = strchr(p, '/');
282 else if (GET_MAJOR_VERSION(cluster->major_version) >= 906)
283 p = strchr(p, ':');
284 else
285 p = NULL;
286
287 if (p == NULL || strlen(p) <= 1)
288 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
289
290 p++; /* remove '/' or ':' char */
291 cluster->controldata.chkpnt_nxtxid = str2uint(p);
292 got_xid = true;
293 }
294 else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
295 {
296 p = strchr(p, ':');
297
298 if (p == NULL || strlen(p) <= 1)
299 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
300
301 p++; /* remove ':' char */
302 cluster->controldata.chkpnt_nxtoid = str2uint(p);
303 got_oid = true;
304 }
305 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
306 {
307 p = strchr(p, ':');
308
309 if (p == NULL || strlen(p) <= 1)
310 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
311
312 p++; /* remove ':' char */
313 cluster->controldata.chkpnt_nxtmulti = str2uint(p);
314 got_multi = true;
315 }
316 else if ((p = strstr(bufin, "Latest checkpoint's oldestXID:")) != NULL)
317 {
318 p = strchr(p, ':');
319
320 if (p == NULL || strlen(p) <= 1)
321 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
322
323 p++; /* remove ':' char */
324 cluster->controldata.chkpnt_oldstxid = str2uint(p);
325 got_oldestxid = true;
326 }
327 else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
328 {
329 p = strchr(p, ':');
330
331 if (p == NULL || strlen(p) <= 1)
332 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
333
334 p++; /* remove ':' char */
335 cluster->controldata.chkpnt_oldstMulti = str2uint(p);
336 got_oldestmulti = true;
337 }
338 else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
339 {
340 p = strchr(p, ':');
341
342 if (p == NULL || strlen(p) <= 1)
343 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
344
345 p++; /* remove ':' char */
346 cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
347 got_mxoff = true;
348 }
349 else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
350 {
351 /* Skip the colon and any whitespace after it */
352 p = strchr(p, ':');
353 if (p == NULL || strlen(p) <= 1)
354 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
355 p = strpbrk(p, "01234567890ABCDEF");
356 if (p == NULL || strlen(p) <= 1)
357 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
358
359 /* Make sure it looks like a valid WAL file name */
360 if (strspn(p, "0123456789ABCDEF") != 24)
361 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
362
363 strlcpy(cluster->controldata.nextxlogfile, p, 25);
364 got_nextxlogfile = true;
365 }
366 else if ((p = strstr(bufin, "Float8 argument passing:")) != 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 /* used later for contrib check */
375 cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
376 got_float8_pass_by_value = true;
377 }
378 else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
379 {
380 p = strchr(p, ':');
381
382 if (p == NULL || strlen(p) <= 1)
383 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
384
385 p++; /* remove ':' char */
386 cluster->controldata.align = str2uint(p);
387 got_align = true;
388 }
389 else if ((p = strstr(bufin, "Database block size:")) != NULL)
390 {
391 p = strchr(p, ':');
392
393 if (p == NULL || strlen(p) <= 1)
394 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
395
396 p++; /* remove ':' char */
397 cluster->controldata.blocksz = str2uint(p);
398 got_blocksz = true;
399 }
400 else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
401 {
402 p = strchr(p, ':');
403
404 if (p == NULL || strlen(p) <= 1)
405 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
406
407 p++; /* remove ':' char */
408 cluster->controldata.largesz = str2uint(p);
409 got_largesz = true;
410 }
411 else if ((p = strstr(bufin, "WAL block size:")) != NULL)
412 {
413 p = strchr(p, ':');
414
415 if (p == NULL || strlen(p) <= 1)
416 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
417
418 p++; /* remove ':' char */
419 cluster->controldata.walsz = str2uint(p);
420 got_walsz = true;
421 }
422 else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
423 {
424 p = strchr(p, ':');
425
426 if (p == NULL || strlen(p) <= 1)
427 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
428
429 p++; /* remove ':' char */
430 cluster->controldata.walseg = str2uint(p);
431 got_walseg = true;
432 }
433 else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
434 {
435 p = strchr(p, ':');
436
437 if (p == NULL || strlen(p) <= 1)
438 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
439
440 p++; /* remove ':' char */
441 cluster->controldata.ident = str2uint(p);
442 got_ident = true;
443 }
444 else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
445 {
446 p = strchr(p, ':');
447
448 if (p == NULL || strlen(p) <= 1)
449 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
450
451 p++; /* remove ':' char */
452 cluster->controldata.index = str2uint(p);
453 got_index = true;
454 }
455 else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
456 {
457 p = strchr(p, ':');
458
459 if (p == NULL || strlen(p) <= 1)
460 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
461
462 p++; /* remove ':' char */
463 cluster->controldata.toast = str2uint(p);
464 got_toast = true;
465 }
466 else if ((p = strstr(bufin, "Size of a large-object chunk:")) != NULL)
467 {
468 p = strchr(p, ':');
469
470 if (p == NULL || strlen(p) <= 1)
471 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
472
473 p++; /* remove ':' char */
474 cluster->controldata.large_object = str2uint(p);
475 got_large_object = true;
476 }
477 else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
478 {
479 p = strchr(p, ':');
480
481 if (p == NULL || strlen(p) <= 1)
482 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
483
484 p++; /* remove ':' char */
485 cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
486 got_date_is_int = true;
487 }
488 else if ((p = strstr(bufin, "checksum")) != NULL)
489 {
490 p = strchr(p, ':');
491
492 if (p == NULL || strlen(p) <= 1)
493 pg_fatal("%d: controldata retrieval problem\n", __LINE__);
494
495 p++; /* remove ':' char */
496 /* used later for contrib check */
497 cluster->controldata.data_checksum_version = str2uint(p);
498 got_data_checksum_version = true;
499 }
500 }
501
502 pclose(output);
503
504 /*
505 * Restore environment variables. Note all but LANG and LC_MESSAGES were
506 * unset above.
507 */
508 if (lc_collate)
509 setenv("LC_COLLATE", lc_collate, 1);
510 if (lc_ctype)
511 setenv("LC_CTYPE", lc_ctype, 1);
512 if (lc_monetary)
513 setenv("LC_MONETARY", lc_monetary, 1);
514 if (lc_numeric)
515 setenv("LC_NUMERIC", lc_numeric, 1);
516 if (lc_time)
517 setenv("LC_TIME", lc_time, 1);
518 if (lang)
519 setenv("LANG", lang, 1);
520 else
521 unsetenv("LANG");
522 if (language)
523 setenv("LANGUAGE", language, 1);
524 if (lc_all)
525 setenv("LC_ALL", lc_all, 1);
526 if (lc_messages)
527 setenv("LC_MESSAGES", lc_messages, 1);
528 else
529 unsetenv("LC_MESSAGES");
530
531 pg_free(lc_collate);
532 pg_free(lc_ctype);
533 pg_free(lc_monetary);
534 pg_free(lc_numeric);
535 pg_free(lc_time);
536 pg_free(lang);
537 pg_free(language);
538 pg_free(lc_all);
539 pg_free(lc_messages);
540
541 /*
542 * Before 9.3, pg_resetwal reported the xlogid and segno of the first log
543 * file after reset as separate lines. Starting with 9.3, it reports the
544 * WAL file name. If the old cluster is older than 9.3, we construct the
545 * WAL file name from the xlogid and segno.
546 */
547 if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
548 {
549 if (got_tli && got_log_id && got_log_seg)
550 {
551 snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
552 tli, logid, segno);
553 got_nextxlogfile = true;
554 }
555 }
556
557 /* verify that we got all the mandatory pg_control data */
558 if (!got_xid || !got_oid ||
559 !got_multi || !got_oldestxid ||
560 (!got_oldestmulti &&
561 cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
562 !got_mxoff || (!live_check && !got_nextxlogfile) ||
563 !got_float8_pass_by_value || !got_align || !got_blocksz ||
564 !got_largesz || !got_walsz || !got_walseg || !got_ident ||
565 !got_index || !got_toast ||
566 (!got_large_object &&
567 cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER) ||
568 !got_date_is_int || !got_data_checksum_version)
569 {
570 if (cluster == &old_cluster)
571 pg_log(PG_REPORT,
572 "The source cluster lacks some required control information:\n");
573 else
574 pg_log(PG_REPORT,
575 "The target cluster lacks some required control information:\n");
576
577 if (!got_xid)
578 pg_log(PG_REPORT, " checkpoint next XID\n");
579
580 if (!got_oid)
581 pg_log(PG_REPORT, " latest checkpoint next OID\n");
582
583 if (!got_multi)
584 pg_log(PG_REPORT, " latest checkpoint next MultiXactId\n");
585
586 if (!got_oldestmulti &&
587 cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
588 pg_log(PG_REPORT, " latest checkpoint oldest MultiXactId\n");
589
590 if (!got_oldestxid)
591 pg_log(PG_REPORT, " latest checkpoint oldestXID\n");
592
593 if (!got_mxoff)
594 pg_log(PG_REPORT, " latest checkpoint next MultiXactOffset\n");
595
596 if (!live_check && !got_nextxlogfile)
597 pg_log(PG_REPORT, " first WAL segment after reset\n");
598
599 if (!got_float8_pass_by_value)
600 pg_log(PG_REPORT, " float8 argument passing method\n");
601
602 if (!got_align)
603 pg_log(PG_REPORT, " maximum alignment\n");
604
605 if (!got_blocksz)
606 pg_log(PG_REPORT, " block size\n");
607
608 if (!got_largesz)
609 pg_log(PG_REPORT, " large relation segment size\n");
610
611 if (!got_walsz)
612 pg_log(PG_REPORT, " WAL block size\n");
613
614 if (!got_walseg)
615 pg_log(PG_REPORT, " WAL segment size\n");
616
617 if (!got_ident)
618 pg_log(PG_REPORT, " maximum identifier length\n");
619
620 if (!got_index)
621 pg_log(PG_REPORT, " maximum number of indexed columns\n");
622
623 if (!got_toast)
624 pg_log(PG_REPORT, " maximum TOAST chunk size\n");
625
626 if (!got_large_object &&
627 cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER)
628 pg_log(PG_REPORT, " large-object chunk size\n");
629
630 if (!got_date_is_int)
631 pg_log(PG_REPORT, " dates/times are integers?\n");
632
633 /* value added in Postgres 9.3 */
634 if (!got_data_checksum_version)
635 pg_log(PG_REPORT, " data checksum version\n");
636
637 pg_fatal("Cannot continue without required control information, terminating\n");
638 }
639 }
640
641
642 /*
643 * check_control_data()
644 *
645 * check to make sure the control data settings are compatible
646 */
647 void
check_control_data(ControlData * oldctrl,ControlData * newctrl)648 check_control_data(ControlData *oldctrl,
649 ControlData *newctrl)
650 {
651 if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
652 pg_fatal("old and new pg_controldata alignments are invalid or do not match\n"
653 "Likely one cluster is a 32-bit install, the other 64-bit\n");
654
655 if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
656 pg_fatal("old and new pg_controldata block sizes are invalid or do not match\n");
657
658 if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
659 pg_fatal("old and new pg_controldata maximum relation segment sizes are invalid or do not match\n");
660
661 if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
662 pg_fatal("old and new pg_controldata WAL block sizes are invalid or do not match\n");
663
664 if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
665 pg_fatal("old and new pg_controldata WAL segment sizes are invalid or do not match\n");
666
667 if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
668 pg_fatal("old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
669
670 if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
671 pg_fatal("old and new pg_controldata maximum indexed columns are invalid or do not match\n");
672
673 if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
674 pg_fatal("old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
675
676 /* large_object added in 9.5, so it might not exist in the old cluster */
677 if (oldctrl->large_object != 0 &&
678 oldctrl->large_object != newctrl->large_object)
679 pg_fatal("old and new pg_controldata large-object chunk sizes are invalid or do not match\n");
680
681 if (oldctrl->date_is_int != newctrl->date_is_int)
682 pg_fatal("old and new pg_controldata date/time storage types do not match\n");
683
684 /*
685 * float8_pass_by_value does not need to match, but is used in
686 * check_for_isn_and_int8_passing_mismatch().
687 */
688
689 /*
690 * We might eventually allow upgrades from checksum to no-checksum
691 * clusters.
692 */
693 if (oldctrl->data_checksum_version == 0 &&
694 newctrl->data_checksum_version != 0)
695 pg_fatal("old cluster does not use data checksums but the new one does\n");
696 else if (oldctrl->data_checksum_version != 0 &&
697 newctrl->data_checksum_version == 0)
698 pg_fatal("old cluster uses data checksums but the new one does not\n");
699 else if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
700 pg_fatal("old and new cluster pg_controldata checksum versions do not match\n");
701 }
702
703
704 void
disable_old_cluster(void)705 disable_old_cluster(void)
706 {
707 char old_path[MAXPGPATH],
708 new_path[MAXPGPATH];
709
710 /* rename pg_control so old server cannot be accidentally started */
711 prep_status("Adding \".old\" suffix to old global/pg_control");
712
713 snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
714 snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
715 if (pg_mv_file(old_path, new_path) != 0)
716 pg_fatal("Unable to rename %s to %s.\n", old_path, new_path);
717 check_ok();
718
719 pg_log(PG_REPORT, "\n"
720 "If you want to start the old cluster, you will need to remove\n"
721 "the \".old\" suffix from %s/global/pg_control.old.\n"
722 "Because \"link\" mode was used, the old cluster cannot be safely\n"
723 "started once the new cluster has been started.\n\n", old_cluster.pgdata);
724 }
725