Line data Source code
1 : /*
2 : * pg_upgrade.c
3 : *
4 : * main source file
5 : *
6 : * Copyright (c) 2010-2022, PostgreSQL Global Development Group
7 : * src/bin/pg_upgrade/pg_upgrade.c
8 : */
9 :
10 : /*
11 : * To simplify the upgrade process, we force certain system values to be
12 : * identical between old and new clusters:
13 : *
14 : * We control all assignments of pg_class.oid (and relfilenode) so toast
15 : * oids are the same between old and new clusters. This is important
16 : * because toast oids are stored as toast pointers in user tables.
17 : *
18 : * While pg_class.oid and pg_class.relfilenode are initially the same in a
19 : * cluster, they can diverge due to CLUSTER, REINDEX, or VACUUM FULL. We
20 : * control assignments of pg_class.relfilenode because we want the filenames
21 : * to match between the old and new cluster.
22 : *
23 : * We control assignment of pg_tablespace.oid because we want the oid to match
24 : * between the old and new cluster.
25 : *
26 : * We control all assignments of pg_type.oid because these oids are stored
27 : * in user composite type values.
28 : *
29 : * We control all assignments of pg_enum.oid because these oids are stored
30 : * in user tables as enum values.
31 : *
32 : * We control all assignments of pg_authid.oid for historical reasons (the
33 : * oids used to be stored in pg_largeobject_metadata, which is now copied via
34 : * SQL commands), that might change at some point in the future.
35 : */
36 :
37 :
38 :
39 : #include "postgres_fe.h"
40 :
41 : #include <time.h>
42 :
43 : #ifdef HAVE_LANGINFO_H
44 : #include <langinfo.h>
45 : #endif
46 :
47 : #include "catalog/pg_class_d.h"
48 : #include "common/file_perm.h"
49 : #include "common/logging.h"
50 : #include "common/restricted_token.h"
51 : #include "fe_utils/string_utils.h"
52 : #include "pg_upgrade.h"
53 :
54 : static void prepare_new_cluster(void);
55 : static void prepare_new_globals(void);
56 : static void create_new_objects(void);
57 : static void copy_xact_xlog_xid(void);
58 : static void set_frozenxids(bool minmxid_only);
59 : static void make_outputdirs(char *pgdata);
60 : static void setup(char *argv0, bool *live_check);
61 :
62 : ClusterInfo old_cluster,
63 : new_cluster;
64 : OSInfo os_info;
65 :
66 : char *output_files[] = {
67 : SERVER_LOG_FILE,
68 : #ifdef WIN32
69 : /* unique file for pg_ctl start */
70 : SERVER_START_LOG_FILE,
71 : #endif
72 : UTILITY_LOG_FILE,
73 : INTERNAL_LOG_FILE,
74 : NULL
75 : };
76 :
77 :
78 : int
79 12 : main(int argc, char **argv)
80 : {
81 12 : char *deletion_script_file_name = NULL;
82 12 : bool live_check = false;
83 :
84 : /*
85 : * pg_upgrade doesn't currently use common/logging.c, but initialize it
86 : * anyway because we might call common code that does.
87 : */
88 12 : pg_logging_init(argv[0]);
89 12 : set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_upgrade"));
90 :
91 : /* Set default restrictive mask until new cluster permissions are read */
92 12 : umask(PG_MODE_MASK_OWNER);
93 :
94 12 : parseCommandLine(argc, argv);
95 :
96 6 : get_restricted_token();
97 :
98 6 : adjust_data_dir(&old_cluster);
99 6 : adjust_data_dir(&new_cluster);
100 :
101 : /*
102 : * Set mask based on PGDATA permissions, needed for the creation of the
103 : * output directories with correct permissions.
104 : */
105 6 : if (!GetDataDirectoryCreatePerm(new_cluster.pgdata))
106 0 : pg_fatal("could not read permissions of directory \"%s\": %s",
107 0 : new_cluster.pgdata, strerror(errno));
108 :
109 6 : umask(pg_mode_mask);
110 :
111 : /*
112 : * This needs to happen after adjusting the data directory of the new
113 : * cluster in adjust_data_dir().
114 : */
115 6 : make_outputdirs(new_cluster.pgdata);
116 :
117 6 : setup(argv[0], &live_check);
118 :
119 4 : output_check_banner(live_check);
120 :
121 4 : check_cluster_versions();
122 :
123 4 : get_sock_dir(&old_cluster, live_check);
124 4 : get_sock_dir(&new_cluster, false);
125 :
126 4 : check_cluster_compatibility(live_check);
127 :
128 4 : check_and_dump_old_cluster(live_check);
129 :
130 :
131 : /* -- NEW -- */
132 4 : start_postmaster(&new_cluster, true);
133 :
134 4 : check_new_cluster();
135 4 : report_clusters_compatible();
136 :
137 2 : pg_log(PG_REPORT,
138 : "\n"
139 : "Performing Upgrade\n"
140 : "------------------");
141 :
142 2 : prepare_new_cluster();
143 :
144 2 : stop_postmaster(false);
145 :
146 : /*
147 : * Destructive Changes to New Cluster
148 : */
149 :
150 2 : copy_xact_xlog_xid();
151 :
152 : /* New now using xids of the old system */
153 :
154 : /* -- NEW -- */
155 2 : start_postmaster(&new_cluster, true);
156 :
157 2 : prepare_new_globals();
158 :
159 2 : create_new_objects();
160 :
161 2 : stop_postmaster(false);
162 :
163 : /*
164 : * Most failures happen in create_new_objects(), which has completed at
165 : * this point. We do this here because it is just before linking, which
166 : * will link the old and new cluster data files, preventing the old
167 : * cluster from being safely started once the new cluster is started.
168 : */
169 2 : if (user_opts.transfer_mode == TRANSFER_MODE_LINK)
170 0 : disable_old_cluster();
171 :
172 2 : transfer_all_new_tablespaces(&old_cluster.dbarr, &new_cluster.dbarr,
173 : old_cluster.pgdata, new_cluster.pgdata);
174 :
175 : /*
176 : * Assuming OIDs are only used in system tables, there is no need to
177 : * restore the OID counter because we have not transferred any OIDs from
178 : * the old system, but we do it anyway just in case. We do it late here
179 : * because there is no need to have the schema load use new oids.
180 : */
181 2 : prep_status("Setting next OID for new cluster");
182 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
183 : "\"%s/pg_resetwal\" -o %u \"%s\"",
184 : new_cluster.bindir, old_cluster.controldata.chkpnt_nxtoid,
185 : new_cluster.pgdata);
186 2 : check_ok();
187 :
188 2 : if (user_opts.do_sync)
189 : {
190 0 : prep_status("Sync data directory to disk");
191 0 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
192 : "\"%s/initdb\" --sync-only \"%s\"", new_cluster.bindir,
193 : new_cluster.pgdata);
194 0 : check_ok();
195 : }
196 :
197 2 : create_script_for_old_cluster_deletion(&deletion_script_file_name);
198 :
199 2 : issue_warnings_and_set_wal_level();
200 :
201 2 : pg_log(PG_REPORT,
202 : "\n"
203 : "Upgrade Complete\n"
204 : "----------------");
205 :
206 2 : output_completion_banner(deletion_script_file_name);
207 :
208 2 : pg_free(deletion_script_file_name);
209 :
210 2 : cleanup_output_dirs();
211 :
212 2 : return 0;
213 : }
214 :
215 : /*
216 : * Create and assign proper permissions to the set of output directories
217 : * used to store any data generated internally, filling in log_opts in
218 : * the process.
219 : */
220 : static void
221 6 : make_outputdirs(char *pgdata)
222 : {
223 : FILE *fp;
224 : char **filename;
225 6 : time_t run_time = time(NULL);
226 : char filename_path[MAXPGPATH];
227 : char timebuf[128];
228 : struct timeval time;
229 : time_t tt;
230 : int len;
231 :
232 6 : log_opts.rootdir = (char *) pg_malloc0(MAXPGPATH);
233 6 : len = snprintf(log_opts.rootdir, MAXPGPATH, "%s/%s", pgdata, BASE_OUTPUTDIR);
234 6 : if (len >= MAXPGPATH)
235 0 : pg_fatal("directory path for new cluster is too long");
236 :
237 : /* BASE_OUTPUTDIR/$timestamp/ */
238 6 : gettimeofday(&time, NULL);
239 6 : tt = (time_t) time.tv_sec;
240 6 : strftime(timebuf, sizeof(timebuf), "%Y%m%dT%H%M%S", localtime(&tt));
241 : /* append milliseconds */
242 6 : snprintf(timebuf + strlen(timebuf), sizeof(timebuf) - strlen(timebuf),
243 6 : ".%03d", (int) (time.tv_usec / 1000));
244 6 : log_opts.basedir = (char *) pg_malloc0(MAXPGPATH);
245 6 : len = snprintf(log_opts.basedir, MAXPGPATH, "%s/%s", log_opts.rootdir,
246 : timebuf);
247 6 : if (len >= MAXPGPATH)
248 0 : pg_fatal("directory path for new cluster is too long");
249 :
250 : /* BASE_OUTPUTDIR/$timestamp/dump/ */
251 6 : log_opts.dumpdir = (char *) pg_malloc0(MAXPGPATH);
252 6 : len = snprintf(log_opts.dumpdir, MAXPGPATH, "%s/%s/%s", log_opts.rootdir,
253 : timebuf, DUMP_OUTPUTDIR);
254 6 : if (len >= MAXPGPATH)
255 0 : pg_fatal("directory path for new cluster is too long");
256 :
257 : /* BASE_OUTPUTDIR/$timestamp/log/ */
258 6 : log_opts.logdir = (char *) pg_malloc0(MAXPGPATH);
259 6 : len = snprintf(log_opts.logdir, MAXPGPATH, "%s/%s/%s", log_opts.rootdir,
260 : timebuf, LOG_OUTPUTDIR);
261 6 : if (len >= MAXPGPATH)
262 0 : pg_fatal("directory path for new cluster is too long");
263 :
264 : /*
265 : * Ignore the error case where the root path exists, as it is kept the
266 : * same across runs.
267 : */
268 6 : if (mkdir(log_opts.rootdir, pg_dir_create_mode) < 0 && errno != EEXIST)
269 0 : pg_fatal("could not create directory \"%s\": %m", log_opts.rootdir);
270 6 : if (mkdir(log_opts.basedir, pg_dir_create_mode) < 0)
271 0 : pg_fatal("could not create directory \"%s\": %m", log_opts.basedir);
272 6 : if (mkdir(log_opts.dumpdir, pg_dir_create_mode) < 0)
273 0 : pg_fatal("could not create directory \"%s\": %m", log_opts.dumpdir);
274 6 : if (mkdir(log_opts.logdir, pg_dir_create_mode) < 0)
275 0 : pg_fatal("could not create directory \"%s\": %m", log_opts.logdir);
276 :
277 6 : len = snprintf(filename_path, sizeof(filename_path), "%s/%s",
278 : log_opts.logdir, INTERNAL_LOG_FILE);
279 6 : if (len >= sizeof(filename_path))
280 0 : pg_fatal("directory path for new cluster is too long");
281 :
282 6 : if ((log_opts.internal = fopen_priv(filename_path, "a")) == NULL)
283 0 : pg_fatal("could not open log file \"%s\": %m", filename_path);
284 :
285 : /* label start of upgrade in logfiles */
286 24 : for (filename = output_files; *filename != NULL; filename++)
287 : {
288 18 : len = snprintf(filename_path, sizeof(filename_path), "%s/%s",
289 : log_opts.logdir, *filename);
290 18 : if (len >= sizeof(filename_path))
291 0 : pg_fatal("directory path for new cluster is too long");
292 18 : if ((fp = fopen_priv(filename_path, "a")) == NULL)
293 0 : pg_fatal("could not write to log file \"%s\": %m", filename_path);
294 :
295 18 : fprintf(fp,
296 : "-----------------------------------------------------------------\n"
297 : " pg_upgrade run on %s"
298 : "-----------------------------------------------------------------\n\n",
299 : ctime(&run_time));
300 18 : fclose(fp);
301 : }
302 6 : }
303 :
304 :
305 : static void
306 6 : setup(char *argv0, bool *live_check)
307 : {
308 : /*
309 : * make sure the user has a clean environment, otherwise, we may confuse
310 : * libpq when we connect to one (or both) of the servers.
311 : */
312 6 : check_pghost_envvar();
313 :
314 : /*
315 : * In case the user hasn't specified the directory for the new binaries
316 : * with -B, default to using the path of the currently executed pg_upgrade
317 : * binary.
318 : */
319 6 : if (!new_cluster.bindir)
320 : {
321 : char exec_path[MAXPGPATH];
322 :
323 0 : if (find_my_exec(argv0, exec_path) < 0)
324 0 : pg_fatal("%s: could not find own program executable", argv0);
325 : /* Trim off program name and keep just path */
326 0 : *last_dir_separator(exec_path) = '\0';
327 0 : canonicalize_path(exec_path);
328 0 : new_cluster.bindir = pg_strdup(exec_path);
329 : }
330 :
331 6 : verify_directories();
332 :
333 : /* no postmasters should be running, except for a live check */
334 4 : if (pid_lock_file_exists(old_cluster.pgdata))
335 : {
336 : /*
337 : * If we have a postmaster.pid file, try to start the server. If it
338 : * starts, the pid file was stale, so stop the server. If it doesn't
339 : * start, assume the server is running. If the pid file is left over
340 : * from a server crash, this also allows any committed transactions
341 : * stored in the WAL to be replayed so they are not lost, because WAL
342 : * files are not transferred from old to new servers. We later check
343 : * for a clean shutdown.
344 : */
345 0 : if (start_postmaster(&old_cluster, false))
346 0 : stop_postmaster(false);
347 : else
348 : {
349 0 : if (!user_opts.check)
350 0 : pg_fatal("There seems to be a postmaster servicing the old cluster.\n"
351 : "Please shutdown that postmaster and try again.");
352 : else
353 0 : *live_check = true;
354 : }
355 : }
356 :
357 : /* same goes for the new postmaster */
358 4 : if (pid_lock_file_exists(new_cluster.pgdata))
359 : {
360 0 : if (start_postmaster(&new_cluster, false))
361 0 : stop_postmaster(false);
362 : else
363 0 : pg_fatal("There seems to be a postmaster servicing the new cluster.\n"
364 : "Please shutdown that postmaster and try again.");
365 : }
366 4 : }
367 :
368 :
369 : static void
370 2 : prepare_new_cluster(void)
371 : {
372 : /*
373 : * It would make more sense to freeze after loading the schema, but that
374 : * would cause us to lose the frozenxids restored by the load. We use
375 : * --analyze so autovacuum doesn't update statistics later
376 : */
377 2 : prep_status("Analyzing all rows in the new cluster");
378 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
379 : "\"%s/vacuumdb\" %s --all --analyze %s",
380 : new_cluster.bindir, cluster_conn_opts(&new_cluster),
381 2 : log_opts.verbose ? "--verbose" : "");
382 2 : check_ok();
383 :
384 : /*
385 : * We do freeze after analyze so pg_statistic is also frozen. template0 is
386 : * not frozen here, but data rows were frozen by initdb, and we set its
387 : * datfrozenxid, relfrozenxids, and relminmxid later to match the new xid
388 : * counter later.
389 : */
390 2 : prep_status("Freezing all rows in the new cluster");
391 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
392 : "\"%s/vacuumdb\" %s --all --freeze %s",
393 : new_cluster.bindir, cluster_conn_opts(&new_cluster),
394 2 : log_opts.verbose ? "--verbose" : "");
395 2 : check_ok();
396 2 : }
397 :
398 :
399 : static void
400 2 : prepare_new_globals(void)
401 : {
402 : /*
403 : * Before we restore anything, set frozenxids of initdb-created tables.
404 : */
405 2 : set_frozenxids(false);
406 :
407 : /*
408 : * Now restore global objects (roles and tablespaces).
409 : */
410 2 : prep_status("Restoring global objects in the new cluster");
411 :
412 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
413 : "\"%s/psql\" " EXEC_PSQL_ARGS " %s -f \"%s/%s\"",
414 : new_cluster.bindir, cluster_conn_opts(&new_cluster),
415 : log_opts.dumpdir,
416 : GLOBALS_DUMP_FILE);
417 2 : check_ok();
418 2 : }
419 :
420 :
421 : static void
422 2 : create_new_objects(void)
423 : {
424 : int dbnum;
425 :
426 2 : prep_status_progress("Restoring database schemas in the new cluster");
427 :
428 : /*
429 : * We cannot process the template1 database concurrently with others,
430 : * because when it's transiently dropped, connection attempts would fail.
431 : * So handle it in a separate non-parallelized pass.
432 : */
433 2 : for (dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
434 : {
435 : char sql_file_name[MAXPGPATH],
436 : log_file_name[MAXPGPATH];
437 2 : DbInfo *old_db = &old_cluster.dbarr.dbs[dbnum];
438 : const char *create_opts;
439 :
440 : /* Process only template1 in this pass */
441 2 : if (strcmp(old_db->db_name, "template1") != 0)
442 0 : continue;
443 :
444 2 : pg_log(PG_STATUS, "%s", old_db->db_name);
445 2 : snprintf(sql_file_name, sizeof(sql_file_name), DB_DUMP_FILE_MASK, old_db->db_oid);
446 2 : snprintf(log_file_name, sizeof(log_file_name), DB_DUMP_LOG_FILE_MASK, old_db->db_oid);
447 :
448 : /*
449 : * template1 database will already exist in the target installation,
450 : * so tell pg_restore to drop and recreate it; otherwise we would fail
451 : * to propagate its database-level properties.
452 : */
453 2 : create_opts = "--clean --create";
454 :
455 2 : exec_prog(log_file_name,
456 : NULL,
457 : true,
458 : true,
459 : "\"%s/pg_restore\" %s %s --exit-on-error --verbose "
460 : "--dbname postgres \"%s/%s\"",
461 : new_cluster.bindir,
462 : cluster_conn_opts(&new_cluster),
463 : create_opts,
464 : log_opts.dumpdir,
465 : sql_file_name);
466 :
467 2 : break; /* done once we've processed template1 */
468 : }
469 :
470 14 : for (dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
471 : {
472 : char sql_file_name[MAXPGPATH],
473 : log_file_name[MAXPGPATH];
474 12 : DbInfo *old_db = &old_cluster.dbarr.dbs[dbnum];
475 : const char *create_opts;
476 :
477 : /* Skip template1 in this pass */
478 12 : if (strcmp(old_db->db_name, "template1") == 0)
479 2 : continue;
480 :
481 10 : pg_log(PG_STATUS, "%s", old_db->db_name);
482 10 : snprintf(sql_file_name, sizeof(sql_file_name), DB_DUMP_FILE_MASK, old_db->db_oid);
483 10 : snprintf(log_file_name, sizeof(log_file_name), DB_DUMP_LOG_FILE_MASK, old_db->db_oid);
484 :
485 : /*
486 : * postgres database will already exist in the target installation, so
487 : * tell pg_restore to drop and recreate it; otherwise we would fail to
488 : * propagate its database-level properties.
489 : */
490 10 : if (strcmp(old_db->db_name, "postgres") == 0)
491 2 : create_opts = "--clean --create";
492 : else
493 8 : create_opts = "--create";
494 :
495 10 : parallel_exec_prog(log_file_name,
496 : NULL,
497 : "\"%s/pg_restore\" %s %s --exit-on-error --verbose "
498 : "--dbname template1 \"%s/%s\"",
499 : new_cluster.bindir,
500 : cluster_conn_opts(&new_cluster),
501 : create_opts,
502 : log_opts.dumpdir,
503 : sql_file_name);
504 : }
505 :
506 : /* reap all children */
507 2 : while (reap_child(true) == true)
508 : ;
509 :
510 2 : end_progress_output();
511 2 : check_ok();
512 :
513 : /*
514 : * We don't have minmxids for databases or relations in pre-9.3 clusters,
515 : * so set those after we have restored the schema.
516 : */
517 2 : if (GET_MAJOR_VERSION(old_cluster.major_version) <= 902)
518 0 : set_frozenxids(true);
519 :
520 : /* update new_cluster info now that we have objects in the databases */
521 2 : get_db_and_rel_infos(&new_cluster);
522 2 : }
523 :
524 : /*
525 : * Delete the given subdirectory contents from the new cluster
526 : */
527 : static void
528 6 : remove_new_subdir(const char *subdir, bool rmtopdir)
529 : {
530 : char new_path[MAXPGPATH];
531 :
532 6 : prep_status("Deleting files from new %s", subdir);
533 :
534 6 : snprintf(new_path, sizeof(new_path), "%s/%s", new_cluster.pgdata, subdir);
535 6 : if (!rmtree(new_path, rmtopdir))
536 0 : pg_fatal("could not delete directory \"%s\"", new_path);
537 :
538 6 : check_ok();
539 6 : }
540 :
541 : /*
542 : * Copy the files from the old cluster into it
543 : */
544 : static void
545 6 : copy_subdir_files(const char *old_subdir, const char *new_subdir)
546 : {
547 : char old_path[MAXPGPATH];
548 : char new_path[MAXPGPATH];
549 :
550 6 : remove_new_subdir(new_subdir, true);
551 :
552 6 : snprintf(old_path, sizeof(old_path), "%s/%s", old_cluster.pgdata, old_subdir);
553 6 : snprintf(new_path, sizeof(new_path), "%s/%s", new_cluster.pgdata, new_subdir);
554 :
555 6 : prep_status("Copying old %s to new server", old_subdir);
556 :
557 6 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
558 : #ifndef WIN32
559 : "cp -Rf \"%s\" \"%s\"",
560 : #else
561 : /* flags: everything, no confirm, quiet, overwrite read-only */
562 : "xcopy /e /y /q /r \"%s\" \"%s\\\"",
563 : #endif
564 : old_path, new_path);
565 :
566 6 : check_ok();
567 6 : }
568 :
569 : static void
570 2 : copy_xact_xlog_xid(void)
571 : {
572 : /*
573 : * Copy old commit logs to new data dir. pg_clog has been renamed to
574 : * pg_xact in post-10 clusters.
575 : */
576 2 : copy_subdir_files(GET_MAJOR_VERSION(old_cluster.major_version) <= 906 ?
577 : "pg_clog" : "pg_xact",
578 2 : GET_MAJOR_VERSION(new_cluster.major_version) <= 906 ?
579 : "pg_clog" : "pg_xact");
580 :
581 2 : prep_status("Setting oldest XID for new cluster");
582 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
583 : "\"%s/pg_resetwal\" -f -u %u \"%s\"",
584 : new_cluster.bindir, old_cluster.controldata.chkpnt_oldstxid,
585 : new_cluster.pgdata);
586 2 : check_ok();
587 :
588 : /* set the next transaction id and epoch of the new cluster */
589 2 : prep_status("Setting next transaction ID and epoch for new cluster");
590 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
591 : "\"%s/pg_resetwal\" -f -x %u \"%s\"",
592 : new_cluster.bindir, old_cluster.controldata.chkpnt_nxtxid,
593 : new_cluster.pgdata);
594 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
595 : "\"%s/pg_resetwal\" -f -e %u \"%s\"",
596 : new_cluster.bindir, old_cluster.controldata.chkpnt_nxtepoch,
597 : new_cluster.pgdata);
598 : /* must reset commit timestamp limits also */
599 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
600 : "\"%s/pg_resetwal\" -f -c %u,%u \"%s\"",
601 : new_cluster.bindir,
602 : old_cluster.controldata.chkpnt_nxtxid,
603 : old_cluster.controldata.chkpnt_nxtxid,
604 : new_cluster.pgdata);
605 2 : check_ok();
606 :
607 : /*
608 : * If the old server is before the MULTIXACT_FORMATCHANGE_CAT_VER change
609 : * (see pg_upgrade.h) and the new server is after, then we don't copy
610 : * pg_multixact files, but we need to reset pg_control so that the new
611 : * server doesn't attempt to read multis older than the cutoff value.
612 : */
613 2 : if (old_cluster.controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER &&
614 2 : new_cluster.controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
615 : {
616 2 : copy_subdir_files("pg_multixact/offsets", "pg_multixact/offsets");
617 2 : copy_subdir_files("pg_multixact/members", "pg_multixact/members");
618 :
619 2 : prep_status("Setting next multixact ID and offset for new cluster");
620 :
621 : /*
622 : * we preserve all files and contents, so we must preserve both "next"
623 : * counters here and the oldest multi present on system.
624 : */
625 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
626 : "\"%s/pg_resetwal\" -O %u -m %u,%u \"%s\"",
627 : new_cluster.bindir,
628 : old_cluster.controldata.chkpnt_nxtmxoff,
629 : old_cluster.controldata.chkpnt_nxtmulti,
630 : old_cluster.controldata.chkpnt_oldstMulti,
631 : new_cluster.pgdata);
632 2 : check_ok();
633 : }
634 0 : else if (new_cluster.controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
635 : {
636 : /*
637 : * Remove offsets/0000 file created by initdb that no longer matches
638 : * the new multi-xid value. "members" starts at zero so no need to
639 : * remove it.
640 : */
641 0 : remove_new_subdir("pg_multixact/offsets", false);
642 :
643 0 : prep_status("Setting oldest multixact ID in new cluster");
644 :
645 : /*
646 : * We don't preserve files in this case, but it's important that the
647 : * oldest multi is set to the latest value used by the old system, so
648 : * that multixact.c returns the empty set for multis that might be
649 : * present on disk. We set next multi to the value following that; it
650 : * might end up wrapped around (i.e. 0) if the old cluster had
651 : * next=MaxMultiXactId, but multixact.c can cope with that just fine.
652 : */
653 0 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
654 : "\"%s/pg_resetwal\" -m %u,%u \"%s\"",
655 : new_cluster.bindir,
656 0 : old_cluster.controldata.chkpnt_nxtmulti + 1,
657 : old_cluster.controldata.chkpnt_nxtmulti,
658 : new_cluster.pgdata);
659 0 : check_ok();
660 : }
661 :
662 : /* now reset the wal archives in the new cluster */
663 2 : prep_status("Resetting WAL archives");
664 2 : exec_prog(UTILITY_LOG_FILE, NULL, true, true,
665 : /* use timeline 1 to match controldata and no WAL history file */
666 : "\"%s/pg_resetwal\" -l 00000001%s \"%s\"", new_cluster.bindir,
667 : old_cluster.controldata.nextxlogfile + 8,
668 : new_cluster.pgdata);
669 2 : check_ok();
670 2 : }
671 :
672 :
673 : /*
674 : * set_frozenxids()
675 : *
676 : * This is called on the new cluster before we restore anything, with
677 : * minmxid_only = false. Its purpose is to ensure that all initdb-created
678 : * vacuumable tables have relfrozenxid/relminmxid matching the old cluster's
679 : * xid/mxid counters. We also initialize the datfrozenxid/datminmxid of the
680 : * built-in databases to match.
681 : *
682 : * As we create user tables later, their relfrozenxid/relminmxid fields will
683 : * be restored properly by the binary-upgrade restore script. Likewise for
684 : * user-database datfrozenxid/datminmxid. However, if we're upgrading from a
685 : * pre-9.3 database, which does not store per-table or per-DB minmxid, then
686 : * the relminmxid/datminmxid values filled in by the restore script will just
687 : * be zeroes.
688 : *
689 : * Hence, with a pre-9.3 source database, a second call occurs after
690 : * everything is restored, with minmxid_only = true. This pass will
691 : * initialize all tables and databases, both those made by initdb and user
692 : * objects, with the desired minmxid value. frozenxid values are left alone.
693 : */
694 : static void
695 2 : set_frozenxids(bool minmxid_only)
696 : {
697 : int dbnum;
698 : PGconn *conn,
699 : *conn_template1;
700 : PGresult *dbres;
701 : int ntups;
702 : int i_datname;
703 : int i_datallowconn;
704 :
705 2 : if (!minmxid_only)
706 2 : prep_status("Setting frozenxid and minmxid counters in new cluster");
707 : else
708 0 : prep_status("Setting minmxid counter in new cluster");
709 :
710 2 : conn_template1 = connectToServer(&new_cluster, "template1");
711 :
712 2 : if (!minmxid_only)
713 : /* set pg_database.datfrozenxid */
714 2 : PQclear(executeQueryOrDie(conn_template1,
715 : "UPDATE pg_catalog.pg_database "
716 : "SET datfrozenxid = '%u'",
717 : old_cluster.controldata.chkpnt_nxtxid));
718 :
719 : /* set pg_database.datminmxid */
720 2 : PQclear(executeQueryOrDie(conn_template1,
721 : "UPDATE pg_catalog.pg_database "
722 : "SET datminmxid = '%u'",
723 : old_cluster.controldata.chkpnt_nxtmulti));
724 :
725 : /* get database names */
726 2 : dbres = executeQueryOrDie(conn_template1,
727 : "SELECT datname, datallowconn "
728 : "FROM pg_catalog.pg_database");
729 :
730 2 : i_datname = PQfnumber(dbres, "datname");
731 2 : i_datallowconn = PQfnumber(dbres, "datallowconn");
732 :
733 2 : ntups = PQntuples(dbres);
734 8 : for (dbnum = 0; dbnum < ntups; dbnum++)
735 : {
736 6 : char *datname = PQgetvalue(dbres, dbnum, i_datname);
737 6 : char *datallowconn = PQgetvalue(dbres, dbnum, i_datallowconn);
738 :
739 : /*
740 : * We must update databases where datallowconn = false, e.g.
741 : * template0, because autovacuum increments their datfrozenxids,
742 : * relfrozenxids, and relminmxid even if autovacuum is turned off, and
743 : * even though all the data rows are already frozen. To enable this,
744 : * we temporarily change datallowconn.
745 : */
746 6 : if (strcmp(datallowconn, "f") == 0)
747 2 : PQclear(executeQueryOrDie(conn_template1,
748 : "ALTER DATABASE %s ALLOW_CONNECTIONS = true",
749 : quote_identifier(datname)));
750 :
751 6 : conn = connectToServer(&new_cluster, datname);
752 :
753 6 : if (!minmxid_only)
754 : /* set pg_class.relfrozenxid */
755 6 : PQclear(executeQueryOrDie(conn,
756 : "UPDATE pg_catalog.pg_class "
757 : "SET relfrozenxid = '%u' "
758 : /* only heap, materialized view, and TOAST are vacuumed */
759 : "WHERE relkind IN ("
760 : CppAsString2(RELKIND_RELATION) ", "
761 : CppAsString2(RELKIND_MATVIEW) ", "
762 : CppAsString2(RELKIND_TOASTVALUE) ")",
763 : old_cluster.controldata.chkpnt_nxtxid));
764 :
765 : /* set pg_class.relminmxid */
766 6 : PQclear(executeQueryOrDie(conn,
767 : "UPDATE pg_catalog.pg_class "
768 : "SET relminmxid = '%u' "
769 : /* only heap, materialized view, and TOAST are vacuumed */
770 : "WHERE relkind IN ("
771 : CppAsString2(RELKIND_RELATION) ", "
772 : CppAsString2(RELKIND_MATVIEW) ", "
773 : CppAsString2(RELKIND_TOASTVALUE) ")",
774 : old_cluster.controldata.chkpnt_nxtmulti));
775 6 : PQfinish(conn);
776 :
777 : /* Reset datallowconn flag */
778 6 : if (strcmp(datallowconn, "f") == 0)
779 2 : PQclear(executeQueryOrDie(conn_template1,
780 : "ALTER DATABASE %s ALLOW_CONNECTIONS = false",
781 : quote_identifier(datname)));
782 : }
783 :
784 2 : PQclear(dbres);
785 :
786 2 : PQfinish(conn_template1);
787 :
788 2 : check_ok();
789 2 : }
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