Line data Source code
1 : /*
2 : * controldata.c
3 : *
4 : * controldata functions
5 : *
6 : * Copyright (c) 2010-2025, PostgreSQL Global Development Group
7 : * src/bin/pg_upgrade/controldata.c
8 : */
9 :
10 : #include "postgres_fe.h"
11 :
12 : #include <ctype.h>
13 : #include <limits.h> /* for CHAR_MIN */
14 :
15 : #include "common/string.h"
16 : #include "pg_upgrade.h"
17 :
18 :
19 : /*
20 : * get_control_data()
21 : *
22 : * gets pg_control information in "ctrl". Assumes that bindir and
23 : * datadir are valid absolute paths to postgresql bin and pgdata
24 : * directories respectively *and* pg_resetwal is version compatible
25 : * with datadir. The main purpose of this function is to get pg_control
26 : * data in a version independent manner.
27 : *
28 : * The approach taken here is to invoke pg_resetwal with -n option
29 : * and then pipe its output. With little string parsing we get the
30 : * pg_control data. pg_resetwal cannot be run while the server is running
31 : * so we use pg_controldata; pg_controldata doesn't provide all the fields
32 : * we need to actually perform the upgrade, but it provides enough for
33 : * check mode. We do not implement pg_resetwal -n because it is hard to
34 : * return valid xid data for a running server.
35 : */
36 : void
37 40 : get_control_data(ClusterInfo *cluster)
38 : {
39 : char cmd[MAXPGPATH];
40 : char bufin[MAX_STRING];
41 : FILE *output;
42 : char *p;
43 40 : bool got_tli = false;
44 40 : bool got_log_id = false;
45 40 : bool got_log_seg = false;
46 40 : bool got_xid = false;
47 40 : bool got_oid = false;
48 40 : bool got_multi = false;
49 40 : bool got_oldestmulti = false;
50 40 : bool got_oldestxid = false;
51 40 : bool got_mxoff = false;
52 40 : bool got_nextxlogfile = false;
53 40 : bool got_float8_pass_by_value = false;
54 40 : bool got_align = false;
55 40 : bool got_blocksz = false;
56 40 : bool got_largesz = false;
57 40 : bool got_walsz = false;
58 40 : bool got_walseg = false;
59 40 : bool got_ident = false;
60 40 : bool got_index = false;
61 40 : bool got_toast = false;
62 40 : bool got_large_object = false;
63 40 : bool got_date_is_int = false;
64 40 : bool got_data_checksum_version = false;
65 40 : bool got_cluster_state = false;
66 40 : bool got_default_char_signedness = false;
67 40 : char *lc_collate = NULL;
68 40 : char *lc_ctype = NULL;
69 40 : char *lc_monetary = NULL;
70 40 : char *lc_numeric = NULL;
71 40 : char *lc_time = NULL;
72 40 : char *lang = NULL;
73 40 : char *language = NULL;
74 40 : char *lc_all = NULL;
75 40 : char *lc_messages = NULL;
76 40 : uint32 tli = 0;
77 40 : uint32 logid = 0;
78 40 : uint32 segno = 0;
79 : char *resetwal_bin;
80 : int rc;
81 40 : bool live_check = (cluster == &old_cluster && user_opts.live_check);
82 :
83 : /*
84 : * Because we test the pg_resetwal output as strings, it has to be in
85 : * English. Copied from pg_regress.c.
86 : */
87 40 : if (getenv("LC_COLLATE"))
88 0 : lc_collate = pg_strdup(getenv("LC_COLLATE"));
89 40 : if (getenv("LC_CTYPE"))
90 0 : lc_ctype = pg_strdup(getenv("LC_CTYPE"));
91 40 : if (getenv("LC_MONETARY"))
92 0 : lc_monetary = pg_strdup(getenv("LC_MONETARY"));
93 40 : if (getenv("LC_NUMERIC"))
94 0 : lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
95 40 : if (getenv("LC_TIME"))
96 0 : lc_time = pg_strdup(getenv("LC_TIME"));
97 40 : if (getenv("LANG"))
98 40 : lang = pg_strdup(getenv("LANG"));
99 40 : if (getenv("LANGUAGE"))
100 0 : language = pg_strdup(getenv("LANGUAGE"));
101 40 : if (getenv("LC_ALL"))
102 0 : lc_all = pg_strdup(getenv("LC_ALL"));
103 40 : if (getenv("LC_MESSAGES"))
104 40 : lc_messages = pg_strdup(getenv("LC_MESSAGES"));
105 :
106 40 : unsetenv("LC_COLLATE");
107 40 : unsetenv("LC_CTYPE");
108 40 : unsetenv("LC_MONETARY");
109 40 : unsetenv("LC_NUMERIC");
110 40 : unsetenv("LC_TIME");
111 : #ifndef WIN32
112 40 : unsetenv("LANG");
113 : #else
114 : /* On Windows the default locale may not be English, so force it */
115 : setenv("LANG", "en", 1);
116 : #endif
117 40 : unsetenv("LANGUAGE");
118 40 : unsetenv("LC_ALL");
119 40 : setenv("LC_MESSAGES", "C", 1);
120 :
121 : /*
122 : * Check for clean shutdown
123 : */
124 40 : if (!live_check || cluster == &new_cluster)
125 : {
126 : /* only pg_controldata outputs the cluster state */
127 40 : snprintf(cmd, sizeof(cmd), "\"%s/pg_controldata\" \"%s\"",
128 : cluster->bindir, cluster->pgdata);
129 40 : fflush(NULL);
130 :
131 40 : if ((output = popen(cmd, "r")) == NULL)
132 0 : pg_fatal("could not get control data using %s: %m", cmd);
133 :
134 : /* we have the result of cmd in "output". so parse it line by line now */
135 2080 : while (fgets(bufin, sizeof(bufin), output))
136 : {
137 2040 : if ((p = strstr(bufin, "Database cluster state:")) != NULL)
138 : {
139 40 : p = strchr(p, ':');
140 :
141 40 : if (p == NULL || strlen(p) <= 1)
142 0 : pg_fatal("%d: database cluster state problem", __LINE__);
143 :
144 40 : p++; /* remove ':' char */
145 :
146 : /*
147 : * We checked earlier for a postmaster lock file, and if we
148 : * found one, we tried to start/stop the server to replay the
149 : * WAL. However, pg_ctl -m immediate doesn't leave a lock
150 : * file, but does require WAL replay, so we check here that
151 : * the server was shut down cleanly, from the controldata
152 : * perspective.
153 : */
154 : /* Remove trailing newline and leading spaces */
155 40 : (void) pg_strip_crlf(p);
156 640 : while (*p == ' ')
157 600 : p++;
158 40 : if (strcmp(p, "shut down in recovery") == 0)
159 : {
160 0 : if (cluster == &old_cluster)
161 0 : 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.");
162 : else
163 0 : 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.");
164 : }
165 40 : else if (strcmp(p, "shut down") != 0)
166 : {
167 0 : if (cluster == &old_cluster)
168 0 : pg_fatal("The source cluster was not shut down cleanly, state reported as: \"%s\"", p);
169 : else
170 0 : pg_fatal("The target cluster was not shut down cleanly, state reported as: \"%s\"", p);
171 : }
172 40 : got_cluster_state = true;
173 : }
174 : }
175 :
176 40 : rc = pclose(output);
177 40 : if (rc != 0)
178 0 : pg_fatal("could not get control data using %s: %s",
179 : cmd, wait_result_to_str(rc));
180 :
181 40 : if (!got_cluster_state)
182 : {
183 0 : if (cluster == &old_cluster)
184 0 : pg_fatal("The source cluster lacks cluster state information:");
185 : else
186 0 : pg_fatal("The target cluster lacks cluster state information:");
187 : }
188 : }
189 :
190 : /* pg_resetxlog has been renamed to pg_resetwal in version 10 */
191 40 : if (GET_MAJOR_VERSION(cluster->bin_version) <= 906)
192 0 : resetwal_bin = "pg_resetxlog\" -n";
193 : else
194 40 : resetwal_bin = "pg_resetwal\" -n";
195 40 : snprintf(cmd, sizeof(cmd), "\"%s/%s \"%s\"",
196 : cluster->bindir,
197 : live_check ? "pg_controldata\"" : resetwal_bin,
198 : cluster->pgdata);
199 40 : fflush(NULL);
200 :
201 40 : if ((output = popen(cmd, "r")) == NULL)
202 0 : pg_fatal("could not get control data using %s: %m", cmd);
203 :
204 : /* Only in <= 9.2 */
205 40 : if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
206 : {
207 0 : cluster->controldata.data_checksum_version = 0;
208 0 : got_data_checksum_version = true;
209 : }
210 :
211 : /* we have the result of cmd in "output". so parse it line by line now */
212 1480 : while (fgets(bufin, sizeof(bufin), output))
213 : {
214 : /* In verbose mode, log each line */
215 1440 : pg_strip_crlf(bufin);
216 1440 : pg_log(PG_VERBOSE, "%s", bufin);
217 :
218 1440 : if ((p = strstr(bufin, "pg_control version number:")) != NULL)
219 : {
220 40 : p = strchr(p, ':');
221 :
222 40 : if (p == NULL || strlen(p) <= 1)
223 0 : pg_fatal("%d: pg_resetwal problem", __LINE__);
224 :
225 40 : p++; /* remove ':' char */
226 40 : cluster->controldata.ctrl_ver = str2uint(p);
227 : }
228 1400 : else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
229 : {
230 40 : p = strchr(p, ':');
231 :
232 40 : if (p == NULL || strlen(p) <= 1)
233 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
234 :
235 40 : p++; /* remove ':' char */
236 40 : cluster->controldata.cat_ver = str2uint(p);
237 : }
238 1360 : else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
239 : {
240 40 : p = strchr(p, ':');
241 :
242 40 : if (p == NULL || strlen(p) <= 1)
243 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
244 :
245 40 : p++; /* remove ':' char */
246 40 : tli = str2uint(p);
247 40 : got_tli = true;
248 : }
249 1320 : else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
250 : {
251 0 : p = strchr(p, ':');
252 :
253 0 : if (p == NULL || strlen(p) <= 1)
254 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
255 :
256 0 : p++; /* remove ':' char */
257 0 : logid = str2uint(p);
258 0 : got_log_id = true;
259 : }
260 1320 : else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
261 : {
262 0 : p = strchr(p, ':');
263 :
264 0 : if (p == NULL || strlen(p) <= 1)
265 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
266 :
267 0 : p++; /* remove ':' char */
268 0 : segno = str2uint(p);
269 0 : got_log_seg = true;
270 : }
271 1320 : else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
272 : {
273 40 : p = strchr(p, ':');
274 :
275 40 : if (p == NULL || strlen(p) <= 1)
276 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
277 :
278 40 : p++; /* remove ':' char */
279 40 : cluster->controldata.chkpnt_nxtepoch = str2uint(p);
280 :
281 : /*
282 : * Delimiter changed from '/' to ':' in 9.6. We don't test for
283 : * the catalog version of the change because the catalog version
284 : * is pulled from pg_controldata too, and it isn't worth adding an
285 : * order dependency for this --- we just check the string.
286 : */
287 40 : if (strchr(p, '/') != NULL)
288 0 : p = strchr(p, '/');
289 40 : else if (GET_MAJOR_VERSION(cluster->major_version) >= 906)
290 40 : p = strchr(p, ':');
291 : else
292 0 : p = NULL;
293 :
294 40 : if (p == NULL || strlen(p) <= 1)
295 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
296 :
297 40 : p++; /* remove '/' or ':' char */
298 40 : cluster->controldata.chkpnt_nxtxid = str2uint(p);
299 40 : got_xid = true;
300 : }
301 1280 : else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
302 : {
303 40 : p = strchr(p, ':');
304 :
305 40 : if (p == NULL || strlen(p) <= 1)
306 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
307 :
308 40 : p++; /* remove ':' char */
309 40 : cluster->controldata.chkpnt_nxtoid = str2uint(p);
310 40 : got_oid = true;
311 : }
312 1240 : else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
313 : {
314 40 : p = strchr(p, ':');
315 :
316 40 : if (p == NULL || strlen(p) <= 1)
317 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
318 :
319 40 : p++; /* remove ':' char */
320 40 : cluster->controldata.chkpnt_nxtmulti = str2uint(p);
321 40 : got_multi = true;
322 : }
323 1200 : else if ((p = strstr(bufin, "Latest checkpoint's oldestXID:")) != NULL)
324 : {
325 40 : p = strchr(p, ':');
326 :
327 40 : if (p == NULL || strlen(p) <= 1)
328 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
329 :
330 40 : p++; /* remove ':' char */
331 40 : cluster->controldata.chkpnt_oldstxid = str2uint(p);
332 40 : got_oldestxid = true;
333 : }
334 1160 : else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
335 : {
336 40 : p = strchr(p, ':');
337 :
338 40 : if (p == NULL || strlen(p) <= 1)
339 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
340 :
341 40 : p++; /* remove ':' char */
342 40 : cluster->controldata.chkpnt_oldstMulti = str2uint(p);
343 40 : got_oldestmulti = true;
344 : }
345 1120 : else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
346 : {
347 40 : p = strchr(p, ':');
348 :
349 40 : if (p == NULL || strlen(p) <= 1)
350 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
351 :
352 40 : p++; /* remove ':' char */
353 40 : cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
354 40 : got_mxoff = true;
355 : }
356 1080 : else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
357 : {
358 : /* Skip the colon and any whitespace after it */
359 40 : p = strchr(p, ':');
360 40 : if (p == NULL || strlen(p) <= 1)
361 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
362 40 : p = strpbrk(p, "01234567890ABCDEF");
363 40 : if (p == NULL || strlen(p) <= 1)
364 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
365 :
366 : /* Make sure it looks like a valid WAL file name */
367 40 : if (strspn(p, "0123456789ABCDEF") != 24)
368 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
369 :
370 40 : strlcpy(cluster->controldata.nextxlogfile, p, 25);
371 40 : got_nextxlogfile = true;
372 : }
373 1040 : else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
374 : {
375 40 : p = strchr(p, ':');
376 :
377 40 : if (p == NULL || strlen(p) <= 1)
378 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
379 :
380 40 : p++; /* remove ':' char */
381 : /* used later for contrib check */
382 40 : cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
383 40 : got_float8_pass_by_value = true;
384 : }
385 1000 : else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
386 : {
387 40 : p = strchr(p, ':');
388 :
389 40 : if (p == NULL || strlen(p) <= 1)
390 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
391 :
392 40 : p++; /* remove ':' char */
393 40 : cluster->controldata.align = str2uint(p);
394 40 : got_align = true;
395 : }
396 960 : else if ((p = strstr(bufin, "Database block size:")) != NULL)
397 : {
398 40 : p = strchr(p, ':');
399 :
400 40 : if (p == NULL || strlen(p) <= 1)
401 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
402 :
403 40 : p++; /* remove ':' char */
404 40 : cluster->controldata.blocksz = str2uint(p);
405 40 : got_blocksz = true;
406 : }
407 920 : else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
408 : {
409 40 : p = strchr(p, ':');
410 :
411 40 : if (p == NULL || strlen(p) <= 1)
412 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
413 :
414 40 : p++; /* remove ':' char */
415 40 : cluster->controldata.largesz = str2uint(p);
416 40 : got_largesz = true;
417 : }
418 880 : else if ((p = strstr(bufin, "WAL block size:")) != NULL)
419 : {
420 40 : p = strchr(p, ':');
421 :
422 40 : if (p == NULL || strlen(p) <= 1)
423 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
424 :
425 40 : p++; /* remove ':' char */
426 40 : cluster->controldata.walsz = str2uint(p);
427 40 : got_walsz = true;
428 : }
429 840 : else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
430 : {
431 40 : p = strchr(p, ':');
432 :
433 40 : if (p == NULL || strlen(p) <= 1)
434 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
435 :
436 40 : p++; /* remove ':' char */
437 40 : cluster->controldata.walseg = str2uint(p);
438 40 : got_walseg = true;
439 : }
440 800 : else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
441 : {
442 40 : p = strchr(p, ':');
443 :
444 40 : if (p == NULL || strlen(p) <= 1)
445 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
446 :
447 40 : p++; /* remove ':' char */
448 40 : cluster->controldata.ident = str2uint(p);
449 40 : got_ident = true;
450 : }
451 760 : else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
452 : {
453 40 : p = strchr(p, ':');
454 :
455 40 : if (p == NULL || strlen(p) <= 1)
456 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
457 :
458 40 : p++; /* remove ':' char */
459 40 : cluster->controldata.index = str2uint(p);
460 40 : got_index = true;
461 : }
462 720 : else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
463 : {
464 40 : p = strchr(p, ':');
465 :
466 40 : if (p == NULL || strlen(p) <= 1)
467 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
468 :
469 40 : p++; /* remove ':' char */
470 40 : cluster->controldata.toast = str2uint(p);
471 40 : got_toast = true;
472 : }
473 680 : else if ((p = strstr(bufin, "Size of a large-object chunk:")) != NULL)
474 : {
475 40 : p = strchr(p, ':');
476 :
477 40 : if (p == NULL || strlen(p) <= 1)
478 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
479 :
480 40 : p++; /* remove ':' char */
481 40 : cluster->controldata.large_object = str2uint(p);
482 40 : got_large_object = true;
483 : }
484 640 : else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
485 : {
486 40 : p = strchr(p, ':');
487 :
488 40 : if (p == NULL || strlen(p) <= 1)
489 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
490 :
491 40 : p++; /* remove ':' char */
492 40 : cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
493 40 : got_date_is_int = true;
494 : }
495 600 : else if ((p = strstr(bufin, "checksum")) != NULL)
496 : {
497 40 : p = strchr(p, ':');
498 :
499 40 : if (p == NULL || strlen(p) <= 1)
500 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
501 :
502 40 : p++; /* remove ':' char */
503 40 : cluster->controldata.data_checksum_version = str2uint(p);
504 40 : got_data_checksum_version = true;
505 : }
506 560 : else if ((p = strstr(bufin, "Default char data signedness:")) != NULL)
507 : {
508 40 : p = strchr(p, ':');
509 :
510 40 : if (p == NULL || strlen(p) <= 1)
511 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
512 :
513 : /* Skip the colon and any whitespace after it */
514 40 : p++;
515 400 : while (isspace((unsigned char) *p))
516 360 : p++;
517 :
518 : /* The value should be either 'signed' or 'unsigned' */
519 40 : if (strcmp(p, "signed") != 0 && strcmp(p, "unsigned") != 0)
520 0 : pg_fatal("%d: controldata retrieval problem", __LINE__);
521 :
522 40 : cluster->controldata.default_char_signedness = strcmp(p, "signed") == 0;
523 40 : got_default_char_signedness = true;
524 : }
525 : }
526 :
527 40 : rc = pclose(output);
528 40 : if (rc != 0)
529 0 : pg_fatal("could not get control data using %s: %s",
530 : cmd, wait_result_to_str(rc));
531 :
532 : /*
533 : * Restore environment variables. Note all but LANG and LC_MESSAGES were
534 : * unset above.
535 : */
536 40 : if (lc_collate)
537 0 : setenv("LC_COLLATE", lc_collate, 1);
538 40 : if (lc_ctype)
539 0 : setenv("LC_CTYPE", lc_ctype, 1);
540 40 : if (lc_monetary)
541 0 : setenv("LC_MONETARY", lc_monetary, 1);
542 40 : if (lc_numeric)
543 0 : setenv("LC_NUMERIC", lc_numeric, 1);
544 40 : if (lc_time)
545 0 : setenv("LC_TIME", lc_time, 1);
546 40 : if (lang)
547 40 : setenv("LANG", lang, 1);
548 : else
549 0 : unsetenv("LANG");
550 40 : if (language)
551 0 : setenv("LANGUAGE", language, 1);
552 40 : if (lc_all)
553 0 : setenv("LC_ALL", lc_all, 1);
554 40 : if (lc_messages)
555 40 : setenv("LC_MESSAGES", lc_messages, 1);
556 : else
557 0 : unsetenv("LC_MESSAGES");
558 :
559 40 : pg_free(lc_collate);
560 40 : pg_free(lc_ctype);
561 40 : pg_free(lc_monetary);
562 40 : pg_free(lc_numeric);
563 40 : pg_free(lc_time);
564 40 : pg_free(lang);
565 40 : pg_free(language);
566 40 : pg_free(lc_all);
567 40 : pg_free(lc_messages);
568 :
569 : /*
570 : * Before 9.3, pg_resetwal reported the xlogid and segno of the first log
571 : * file after reset as separate lines. Starting with 9.3, it reports the
572 : * WAL file name. If the old cluster is older than 9.3, we construct the
573 : * WAL file name from the xlogid and segno.
574 : */
575 40 : if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
576 : {
577 0 : if (got_tli && got_log_id && got_log_seg)
578 : {
579 0 : snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
580 : tli, logid, segno);
581 0 : got_nextxlogfile = true;
582 : }
583 : }
584 :
585 : /*
586 : * Pre-v18 database clusters don't have the default char signedness
587 : * information. We use the char signedness of the platform where
588 : * pg_upgrade was built.
589 : */
590 40 : if (cluster->controldata.cat_ver < DEFAULT_CHAR_SIGNEDNESS_CAT_VER)
591 : {
592 : Assert(!got_default_char_signedness);
593 : #if CHAR_MIN != 0
594 0 : cluster->controldata.default_char_signedness = true;
595 : #else
596 : cluster->controldata.default_char_signedness = false;
597 : #endif
598 : }
599 :
600 : /* verify that we got all the mandatory pg_control data */
601 40 : if (!got_xid || !got_oid ||
602 40 : !got_multi || !got_oldestxid ||
603 40 : (!got_oldestmulti &&
604 0 : cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
605 40 : !got_mxoff || (!live_check && !got_nextxlogfile) ||
606 40 : !got_float8_pass_by_value || !got_align || !got_blocksz ||
607 40 : !got_largesz || !got_walsz || !got_walseg || !got_ident ||
608 40 : !got_index || !got_toast ||
609 40 : (!got_large_object &&
610 0 : cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER) ||
611 40 : !got_date_is_int || !got_data_checksum_version ||
612 40 : (!got_default_char_signedness &&
613 0 : cluster->controldata.cat_ver >= DEFAULT_CHAR_SIGNEDNESS_CAT_VER))
614 : {
615 0 : if (cluster == &old_cluster)
616 0 : pg_log(PG_REPORT,
617 : "The source cluster lacks some required control information:");
618 : else
619 0 : pg_log(PG_REPORT,
620 : "The target cluster lacks some required control information:");
621 :
622 0 : if (!got_xid)
623 0 : pg_log(PG_REPORT, " checkpoint next XID");
624 :
625 0 : if (!got_oid)
626 0 : pg_log(PG_REPORT, " latest checkpoint next OID");
627 :
628 0 : if (!got_multi)
629 0 : pg_log(PG_REPORT, " latest checkpoint next MultiXactId");
630 :
631 0 : if (!got_oldestmulti &&
632 0 : cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
633 0 : pg_log(PG_REPORT, " latest checkpoint oldest MultiXactId");
634 :
635 0 : if (!got_oldestxid)
636 0 : pg_log(PG_REPORT, " latest checkpoint oldestXID");
637 :
638 0 : if (!got_mxoff)
639 0 : pg_log(PG_REPORT, " latest checkpoint next MultiXactOffset");
640 :
641 0 : if (!live_check && !got_nextxlogfile)
642 0 : pg_log(PG_REPORT, " first WAL segment after reset");
643 :
644 0 : if (!got_float8_pass_by_value)
645 0 : pg_log(PG_REPORT, " float8 argument passing method");
646 :
647 0 : if (!got_align)
648 0 : pg_log(PG_REPORT, " maximum alignment");
649 :
650 0 : if (!got_blocksz)
651 0 : pg_log(PG_REPORT, " block size");
652 :
653 0 : if (!got_largesz)
654 0 : pg_log(PG_REPORT, " large relation segment size");
655 :
656 0 : if (!got_walsz)
657 0 : pg_log(PG_REPORT, " WAL block size");
658 :
659 0 : if (!got_walseg)
660 0 : pg_log(PG_REPORT, " WAL segment size");
661 :
662 0 : if (!got_ident)
663 0 : pg_log(PG_REPORT, " maximum identifier length");
664 :
665 0 : if (!got_index)
666 0 : pg_log(PG_REPORT, " maximum number of indexed columns");
667 :
668 0 : if (!got_toast)
669 0 : pg_log(PG_REPORT, " maximum TOAST chunk size");
670 :
671 0 : if (!got_large_object &&
672 0 : cluster->controldata.ctrl_ver >= LARGE_OBJECT_SIZE_PG_CONTROL_VER)
673 0 : pg_log(PG_REPORT, " large-object chunk size");
674 :
675 0 : if (!got_date_is_int)
676 0 : pg_log(PG_REPORT, " dates/times are integers?");
677 :
678 : /* value added in Postgres 9.3 */
679 0 : if (!got_data_checksum_version)
680 0 : pg_log(PG_REPORT, " data checksum version");
681 :
682 : /* value added in Postgres 18 */
683 0 : if (!got_default_char_signedness)
684 0 : pg_log(PG_REPORT, " default char signedness");
685 :
686 0 : pg_fatal("Cannot continue without required control information, terminating");
687 : }
688 40 : }
689 :
690 :
691 : /*
692 : * check_control_data()
693 : *
694 : * check to make sure the control data settings are compatible
695 : */
696 : void
697 20 : check_control_data(ControlData *oldctrl,
698 : ControlData *newctrl)
699 : {
700 20 : if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
701 0 : pg_fatal("old and new pg_controldata alignments are invalid or do not match.\n"
702 : "Likely one cluster is a 32-bit install, the other 64-bit");
703 :
704 20 : if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
705 0 : pg_fatal("old and new pg_controldata block sizes are invalid or do not match");
706 :
707 20 : if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
708 0 : pg_fatal("old and new pg_controldata maximum relation segment sizes are invalid or do not match");
709 :
710 20 : if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
711 0 : pg_fatal("old and new pg_controldata WAL block sizes are invalid or do not match");
712 :
713 20 : if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
714 0 : pg_fatal("old and new pg_controldata WAL segment sizes are invalid or do not match");
715 :
716 20 : if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
717 0 : pg_fatal("old and new pg_controldata maximum identifier lengths are invalid or do not match");
718 :
719 20 : if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
720 0 : pg_fatal("old and new pg_controldata maximum indexed columns are invalid or do not match");
721 :
722 20 : if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
723 0 : pg_fatal("old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match");
724 :
725 : /* large_object added in 9.5, so it might not exist in the old cluster */
726 20 : if (oldctrl->large_object != 0 &&
727 20 : oldctrl->large_object != newctrl->large_object)
728 0 : pg_fatal("old and new pg_controldata large-object chunk sizes are invalid or do not match");
729 :
730 20 : if (oldctrl->date_is_int != newctrl->date_is_int)
731 0 : pg_fatal("old and new pg_controldata date/time storage types do not match");
732 :
733 : /*
734 : * float8_pass_by_value does not need to match, but is used in
735 : * check_for_isn_and_int8_passing_mismatch().
736 : */
737 :
738 : /*
739 : * We might eventually allow upgrades from checksum to no-checksum
740 : * clusters.
741 : */
742 20 : if (oldctrl->data_checksum_version == 0 &&
743 0 : newctrl->data_checksum_version != 0)
744 0 : pg_fatal("old cluster does not use data checksums but the new one does");
745 20 : else if (oldctrl->data_checksum_version != 0 &&
746 20 : newctrl->data_checksum_version == 0)
747 0 : pg_fatal("old cluster uses data checksums but the new one does not");
748 20 : else if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
749 0 : pg_fatal("old and new cluster pg_controldata checksum versions do not match");
750 20 : }
751 :
752 :
753 : void
754 0 : disable_old_cluster(void)
755 : {
756 : char old_path[MAXPGPATH],
757 : new_path[MAXPGPATH];
758 :
759 : /* rename pg_control so old server cannot be accidentally started */
760 0 : prep_status("Adding \".old\" suffix to old global/pg_control");
761 :
762 0 : snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
763 0 : snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
764 0 : if (pg_mv_file(old_path, new_path) != 0)
765 0 : pg_fatal("could not rename file \"%s\" to \"%s\": %m",
766 : old_path, new_path);
767 0 : check_ok();
768 :
769 0 : pg_log(PG_REPORT, "\n"
770 : "If you want to start the old cluster, you will need to remove\n"
771 : "the \".old\" suffix from %s/global/pg_control.old.\n"
772 : "Because \"link\" mode was used, the old cluster cannot be safely\n"
773 : "started once the new cluster has been started.",
774 : old_cluster.pgdata);
775 0 : }
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