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xlogarchive.c
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1 /*-------------------------------------------------------------------------
2  *
3  * xlogarchive.c
4  * Functions for archiving WAL files and restoring from the archive.
5  *
6  *
7  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
8  * Portions Copyright (c) 1994, Regents of the University of California
9  *
10  * src/backend/access/transam/xlogarchive.c
11  *
12  *-------------------------------------------------------------------------
13  */
14 
15 #include "postgres.h"
16 
17 #include <sys/stat.h>
18 #include <sys/wait.h>
19 #include <signal.h>
20 #include <unistd.h>
21 
22 #include "access/xlog.h"
23 #include "access/xlog_internal.h"
24 #include "access/xlogarchive.h"
25 #include "common/archive.h"
26 #include "common/percentrepl.h"
27 #include "miscadmin.h"
28 #include "pgstat.h"
29 #include "postmaster/pgarch.h"
30 #include "postmaster/startup.h"
31 #include "replication/walsender.h"
32 #include "storage/fd.h"
33 #include "storage/ipc.h"
34 
35 /*
36  * Attempt to retrieve the specified file from off-line archival storage.
37  * If successful, fill "path" with its complete path (note that this will be
38  * a temp file name that doesn't follow the normal naming convention), and
39  * return true.
40  *
41  * If not successful, fill "path" with the name of the normal on-line file
42  * (which may or may not actually exist, but we'll try to use it), and return
43  * false.
44  *
45  * For fixed-size files, the caller may pass the expected size as an
46  * additional crosscheck on successful recovery. If the file size is not
47  * known, set expectedSize = 0.
48  *
49  * When 'cleanupEnabled' is false, refrain from deleting any old WAL segments
50  * in the archive. This is used when fetching the initial checkpoint record,
51  * when we are not yet sure how far back we need the WAL.
52  */
53 bool
54 RestoreArchivedFile(char *path, const char *xlogfname,
55  const char *recovername, off_t expectedSize,
56  bool cleanupEnabled)
57 {
58  char xlogpath[MAXPGPATH];
59  char *xlogRestoreCmd;
60  char lastRestartPointFname[MAXPGPATH];
61  int rc;
62  struct stat stat_buf;
63  XLogSegNo restartSegNo;
64  XLogRecPtr restartRedoPtr;
65  TimeLineID restartTli;
66 
67  /*
68  * Ignore restore_command when not in archive recovery (meaning we are in
69  * crash recovery).
70  */
72  goto not_available;
73 
74  /* In standby mode, restore_command might not be supplied */
75  if (recoveryRestoreCommand == NULL || strcmp(recoveryRestoreCommand, "") == 0)
76  goto not_available;
77 
78  /*
79  * When doing archive recovery, we always prefer an archived log file even
80  * if a file of the same name exists in XLOGDIR. The reason is that the
81  * file in XLOGDIR could be an old, un-filled or partly-filled version
82  * that was copied and restored as part of backing up $PGDATA.
83  *
84  * We could try to optimize this slightly by checking the local copy
85  * lastchange timestamp against the archived copy, but we have no API to
86  * do this, nor can we guarantee that the lastchange timestamp was
87  * preserved correctly when we copied to archive. Our aim is robustness,
88  * so we elect not to do this.
89  *
90  * If we cannot obtain the log file from the archive, however, we will try
91  * to use the XLOGDIR file if it exists. This is so that we can make use
92  * of log segments that weren't yet transferred to the archive.
93  *
94  * Notice that we don't actually overwrite any files when we copy back
95  * from archive because the restore_command may inadvertently restore
96  * inappropriate xlogs, or they may be corrupt, so we may wish to fallback
97  * to the segments remaining in current XLOGDIR later. The
98  * copy-from-archive filename is always the same, ensuring that we don't
99  * run out of disk space on long recoveries.
100  */
101  snprintf(xlogpath, MAXPGPATH, XLOGDIR "/%s", recovername);
102 
103  /*
104  * Make sure there is no existing file named recovername.
105  */
106  if (stat(xlogpath, &stat_buf) != 0)
107  {
108  if (errno != ENOENT)
109  ereport(FATAL,
111  errmsg("could not stat file \"%s\": %m",
112  xlogpath)));
113  }
114  else
115  {
116  if (unlink(xlogpath) != 0)
117  ereport(FATAL,
119  errmsg("could not remove file \"%s\": %m",
120  xlogpath)));
121  }
122 
123  /*
124  * Calculate the archive file cutoff point for use during log shipping
125  * replication. All files earlier than this point can be deleted from the
126  * archive, though there is no requirement to do so.
127  *
128  * If cleanup is not enabled, initialise this with the filename of
129  * InvalidXLogRecPtr, which will prevent the deletion of any WAL files
130  * from the archive because of the alphabetic sorting property of WAL
131  * filenames.
132  *
133  * Once we have successfully located the redo pointer of the checkpoint
134  * from which we start recovery we never request a file prior to the redo
135  * pointer of the last restartpoint. When redo begins we know that we have
136  * successfully located it, so there is no need for additional status
137  * flags to signify the point when we can begin deleting WAL files from
138  * the archive.
139  */
140  if (cleanupEnabled)
141  {
142  GetOldestRestartPoint(&restartRedoPtr, &restartTli);
143  XLByteToSeg(restartRedoPtr, restartSegNo, wal_segment_size);
144  XLogFileName(lastRestartPointFname, restartTli, restartSegNo,
146  /* we shouldn't need anything earlier than last restart point */
147  Assert(strcmp(lastRestartPointFname, xlogfname) <= 0);
148  }
149  else
150  XLogFileName(lastRestartPointFname, 0, 0, wal_segment_size);
151 
152  /* Build the restore command to execute */
154  xlogpath, xlogfname,
155  lastRestartPointFname);
156 
157  ereport(DEBUG3,
158  (errmsg_internal("executing restore command \"%s\"",
159  xlogRestoreCmd)));
160 
161  fflush(NULL);
162  pgstat_report_wait_start(WAIT_EVENT_RESTORE_COMMAND);
163 
164  /*
165  * PreRestoreCommand() informs the SIGTERM handler for the startup process
166  * that it should proc_exit() right away. This is done for the duration
167  * of the system() call because there isn't a good way to break out while
168  * it is executing. Since we might call proc_exit() in a signal handler,
169  * it is best to put any additional logic before or after the
170  * PreRestoreCommand()/PostRestoreCommand() section.
171  */
173 
174  /*
175  * Copy xlog from archival storage to XLOGDIR
176  */
177  rc = system(xlogRestoreCmd);
178 
180 
182  pfree(xlogRestoreCmd);
183 
184  if (rc == 0)
185  {
186  /*
187  * command apparently succeeded, but let's make sure the file is
188  * really there now and has the correct size.
189  */
190  if (stat(xlogpath, &stat_buf) == 0)
191  {
192  if (expectedSize > 0 && stat_buf.st_size != expectedSize)
193  {
194  int elevel;
195 
196  /*
197  * If we find a partial file in standby mode, we assume it's
198  * because it's just being copied to the archive, and keep
199  * trying.
200  *
201  * Otherwise treat a wrong-sized file as FATAL to ensure the
202  * DBA would notice it, but is that too strong? We could try
203  * to plow ahead with a local copy of the file ... but the
204  * problem is that there probably isn't one, and we'd
205  * incorrectly conclude we've reached the end of WAL and we're
206  * done recovering ...
207  */
208  if (StandbyMode && stat_buf.st_size < expectedSize)
209  elevel = DEBUG1;
210  else
211  elevel = FATAL;
212  ereport(elevel,
213  (errmsg("archive file \"%s\" has wrong size: %lld instead of %lld",
214  xlogfname,
215  (long long int) stat_buf.st_size,
216  (long long int) expectedSize)));
217  return false;
218  }
219  else
220  {
221  ereport(LOG,
222  (errmsg("restored log file \"%s\" from archive",
223  xlogfname)));
224  strcpy(path, xlogpath);
225  return true;
226  }
227  }
228  else
229  {
230  /* stat failed */
231  int elevel = (errno == ENOENT) ? LOG : FATAL;
232 
233  ereport(elevel,
235  errmsg("could not stat file \"%s\": %m", xlogpath),
236  errdetail("\"restore_command\" returned a zero exit status, but stat() failed.")));
237  }
238  }
239 
240  /*
241  * Remember, we rollforward UNTIL the restore fails so failure here is
242  * just part of the process... that makes it difficult to determine
243  * whether the restore failed because there isn't an archive to restore,
244  * or because the administrator has specified the restore program
245  * incorrectly. We have to assume the former.
246  *
247  * However, if the failure was due to any sort of signal, it's best to
248  * punt and abort recovery. (If we "return false" here, upper levels will
249  * assume that recovery is complete and start up the database!) It's
250  * essential to abort on child SIGINT and SIGQUIT, because per spec
251  * system() ignores SIGINT and SIGQUIT while waiting; if we see one of
252  * those it's a good bet we should have gotten it too.
253  *
254  * On SIGTERM, assume we have received a fast shutdown request, and exit
255  * cleanly. It's pure chance whether we receive the SIGTERM first, or the
256  * child process. If we receive it first, the signal handler will call
257  * proc_exit, otherwise we do it here. If we or the child process received
258  * SIGTERM for any other reason than a fast shutdown request, postmaster
259  * will perform an immediate shutdown when it sees us exiting
260  * unexpectedly.
261  *
262  * We treat hard shell errors such as "command not found" as fatal, too.
263  */
264  if (wait_result_is_signal(rc, SIGTERM))
265  proc_exit(1);
266 
268  (errmsg("could not restore file \"%s\" from archive: %s",
269  xlogfname, wait_result_to_str(rc))));
270 
271 not_available:
272 
273  /*
274  * if an archived file is not available, there might still be a version of
275  * this file in XLOGDIR, so return that as the filename to open.
276  *
277  * In many recovery scenarios we expect this to fail also, but if so that
278  * just means we've reached the end of WAL.
279  */
280  snprintf(path, MAXPGPATH, XLOGDIR "/%s", xlogfname);
281  return false;
282 }
283 
284 /*
285  * Attempt to execute an external shell command during recovery.
286  *
287  * 'command' is the shell command to be executed, 'commandName' is a
288  * human-readable name describing the command emitted in the logs. If
289  * 'failOnSignal' is true and the command is killed by a signal, a FATAL
290  * error is thrown. Otherwise a WARNING is emitted.
291  *
292  * This is currently used for recovery_end_command and archive_cleanup_command.
293  */
294 void
295 ExecuteRecoveryCommand(const char *command, const char *commandName,
296  bool failOnSignal, uint32 wait_event_info)
297 {
298  char *xlogRecoveryCmd;
299  char lastRestartPointFname[MAXPGPATH];
300  int rc;
301  XLogSegNo restartSegNo;
302  XLogRecPtr restartRedoPtr;
303  TimeLineID restartTli;
304 
305  Assert(command && commandName);
306 
307  /*
308  * Calculate the archive file cutoff point for use during log shipping
309  * replication. All files earlier than this point can be deleted from the
310  * archive, though there is no requirement to do so.
311  */
312  GetOldestRestartPoint(&restartRedoPtr, &restartTli);
313  XLByteToSeg(restartRedoPtr, restartSegNo, wal_segment_size);
314  XLogFileName(lastRestartPointFname, restartTli, restartSegNo,
316 
317  /*
318  * construct the command to be executed
319  */
320  xlogRecoveryCmd = replace_percent_placeholders(command, commandName, "r", lastRestartPointFname);
321 
322  ereport(DEBUG3,
323  (errmsg_internal("executing %s \"%s\"", commandName, command)));
324 
325  /*
326  * execute the constructed command
327  */
328  fflush(NULL);
329  pgstat_report_wait_start(wait_event_info);
330  rc = system(xlogRecoveryCmd);
332 
333  pfree(xlogRecoveryCmd);
334 
335  if (rc != 0)
336  {
337  /*
338  * If the failure was due to any sort of signal, it's best to punt and
339  * abort recovery. See comments in RestoreArchivedFile().
340  */
341  ereport((failOnSignal && wait_result_is_any_signal(rc, true)) ? FATAL : WARNING,
342  /*------
343  translator: First %s represents a postgresql.conf parameter name like
344  "recovery_end_command", the 2nd is the value of that parameter, the
345  third an already translated error message. */
346  (errmsg("%s \"%s\": %s", commandName,
347  command, wait_result_to_str(rc))));
348  }
349 }
350 
351 
352 /*
353  * A file was restored from the archive under a temporary filename (path),
354  * and now we want to keep it. Rename it under the permanent filename in
355  * pg_wal (xlogfname), replacing any existing file with the same name.
356  */
357 void
358 KeepFileRestoredFromArchive(const char *path, const char *xlogfname)
359 {
360  char xlogfpath[MAXPGPATH];
361  bool reload = false;
362  struct stat statbuf;
363 
364  snprintf(xlogfpath, MAXPGPATH, XLOGDIR "/%s", xlogfname);
365 
366  if (stat(xlogfpath, &statbuf) == 0)
367  {
368  char oldpath[MAXPGPATH];
369 
370 #ifdef WIN32
371  static unsigned int deletedcounter = 1;
372 
373  /*
374  * On Windows, if another process (e.g a walsender process) holds the
375  * file open in FILE_SHARE_DELETE mode, unlink will succeed, but the
376  * file will still show up in directory listing until the last handle
377  * is closed, and we cannot rename the new file in its place until
378  * that. To avoid that problem, rename the old file to a temporary
379  * name first. Use a counter to create a unique filename, because the
380  * same file might be restored from the archive multiple times, and a
381  * walsender could still be holding onto an old deleted version of it.
382  */
383  snprintf(oldpath, MAXPGPATH, "%s.deleted%u",
384  xlogfpath, deletedcounter++);
385  if (rename(xlogfpath, oldpath) != 0)
386  {
387  ereport(ERROR,
389  errmsg("could not rename file \"%s\" to \"%s\": %m",
390  xlogfpath, oldpath)));
391  }
392 #else
393  /* same-size buffers, so this never truncates */
394  strlcpy(oldpath, xlogfpath, MAXPGPATH);
395 #endif
396  if (unlink(oldpath) != 0)
397  ereport(FATAL,
399  errmsg("could not remove file \"%s\": %m",
400  xlogfpath)));
401  reload = true;
402  }
403 
405 
406  /*
407  * Create .done file forcibly to prevent the restored segment from being
408  * archived again later.
409  */
411  XLogArchiveForceDone(xlogfname);
412  else
413  XLogArchiveNotify(xlogfname);
414 
415  /*
416  * If the existing file was replaced, since walsenders might have it open,
417  * request them to reload a currently-open segment. This is only required
418  * for WAL segments, walsenders don't hold other files open, but there's
419  * no harm in doing this too often, and we don't know what kind of a file
420  * we're dealing with here.
421  */
422  if (reload)
424 
425  /*
426  * Signal walsender that new WAL has arrived. Again, this isn't necessary
427  * if we restored something other than a WAL segment, but it does no harm
428  * either.
429  */
430  WalSndWakeup(true, false);
431 }
432 
433 /*
434  * XLogArchiveNotify
435  *
436  * Create an archive notification file
437  *
438  * The name of the notification file is the message that will be picked up
439  * by the archiver, e.g. we write 0000000100000001000000C6.ready
440  * and the archiver then knows to archive XLOGDIR/0000000100000001000000C6,
441  * then when complete, rename it to 0000000100000001000000C6.done
442  */
443 void
444 XLogArchiveNotify(const char *xlog)
445 {
446  char archiveStatusPath[MAXPGPATH];
447  FILE *fd;
448 
449  /* insert an otherwise empty file called <XLOG>.ready */
450  StatusFilePath(archiveStatusPath, xlog, ".ready");
451  fd = AllocateFile(archiveStatusPath, "w");
452  if (fd == NULL)
453  {
454  ereport(LOG,
456  errmsg("could not create archive status file \"%s\": %m",
457  archiveStatusPath)));
458  return;
459  }
460  if (FreeFile(fd))
461  {
462  ereport(LOG,
464  errmsg("could not write archive status file \"%s\": %m",
465  archiveStatusPath)));
466  return;
467  }
468 
469  /*
470  * Timeline history files are given the highest archival priority to lower
471  * the chance that a promoted standby will choose a timeline that is
472  * already in use. However, the archiver ordinarily tries to gather
473  * multiple files to archive from each scan of the archive_status
474  * directory, which means that newly created timeline history files could
475  * be left unarchived for a while. To ensure that the archiver picks up
476  * timeline history files as soon as possible, we force the archiver to
477  * scan the archive_status directory the next time it looks for a file to
478  * archive.
479  */
480  if (IsTLHistoryFileName(xlog))
482 
483  /* Notify archiver that it's got something to do */
484  if (IsUnderPostmaster)
485  PgArchWakeup();
486 }
487 
488 /*
489  * Convenience routine to notify using segment number representation of filename
490  */
491 void
493 {
494  char xlog[MAXFNAMELEN];
495 
496  Assert(tli != 0);
497 
498  XLogFileName(xlog, tli, segno, wal_segment_size);
499  XLogArchiveNotify(xlog);
500 }
501 
502 /*
503  * XLogArchiveForceDone
504  *
505  * Emit notification forcibly that an XLOG segment file has been successfully
506  * archived, by creating <XLOG>.done regardless of whether <XLOG>.ready
507  * exists or not.
508  */
509 void
510 XLogArchiveForceDone(const char *xlog)
511 {
512  char archiveReady[MAXPGPATH];
513  char archiveDone[MAXPGPATH];
514  struct stat stat_buf;
515  FILE *fd;
516 
517  /* Exit if already known done */
518  StatusFilePath(archiveDone, xlog, ".done");
519  if (stat(archiveDone, &stat_buf) == 0)
520  return;
521 
522  /* If .ready exists, rename it to .done */
523  StatusFilePath(archiveReady, xlog, ".ready");
524  if (stat(archiveReady, &stat_buf) == 0)
525  {
526  (void) durable_rename(archiveReady, archiveDone, WARNING);
527  return;
528  }
529 
530  /* insert an otherwise empty file called <XLOG>.done */
531  fd = AllocateFile(archiveDone, "w");
532  if (fd == NULL)
533  {
534  ereport(LOG,
536  errmsg("could not create archive status file \"%s\": %m",
537  archiveDone)));
538  return;
539  }
540  if (FreeFile(fd))
541  {
542  ereport(LOG,
544  errmsg("could not write archive status file \"%s\": %m",
545  archiveDone)));
546  return;
547  }
548 }
549 
550 /*
551  * XLogArchiveCheckDone
552  *
553  * This is called when we are ready to delete or recycle an old XLOG segment
554  * file or backup history file. If it is okay to delete it then return true.
555  * If it is not time to delete it, make sure a .ready file exists, and return
556  * false.
557  *
558  * If <XLOG>.done exists, then return true; else if <XLOG>.ready exists,
559  * then return false; else create <XLOG>.ready and return false.
560  *
561  * The reason we do things this way is so that if the original attempt to
562  * create <XLOG>.ready fails, we'll retry during subsequent checkpoints.
563  */
564 bool
565 XLogArchiveCheckDone(const char *xlog)
566 {
567  char archiveStatusPath[MAXPGPATH];
568  struct stat stat_buf;
569 
570  /* The file is always deletable if archive_mode is "off". */
571  if (!XLogArchivingActive())
572  return true;
573 
574  /*
575  * During archive recovery, the file is deletable if archive_mode is not
576  * "always".
577  */
578  if (!XLogArchivingAlways() &&
580  return true;
581 
582  /*
583  * At this point of the logic, note that we are either a primary with
584  * archive_mode set to "on" or "always", or a standby with archive_mode
585  * set to "always".
586  */
587 
588  /* First check for .done --- this means archiver is done with it */
589  StatusFilePath(archiveStatusPath, xlog, ".done");
590  if (stat(archiveStatusPath, &stat_buf) == 0)
591  return true;
592 
593  /* check for .ready --- this means archiver is still busy with it */
594  StatusFilePath(archiveStatusPath, xlog, ".ready");
595  if (stat(archiveStatusPath, &stat_buf) == 0)
596  return false;
597 
598  /* Race condition --- maybe archiver just finished, so recheck */
599  StatusFilePath(archiveStatusPath, xlog, ".done");
600  if (stat(archiveStatusPath, &stat_buf) == 0)
601  return true;
602 
603  /* Retry creation of the .ready file */
604  XLogArchiveNotify(xlog);
605  return false;
606 }
607 
608 /*
609  * XLogArchiveIsBusy
610  *
611  * Check to see if an XLOG segment file is still unarchived.
612  * This is almost but not quite the inverse of XLogArchiveCheckDone: in
613  * the first place we aren't chartered to recreate the .ready file, and
614  * in the second place we should consider that if the file is already gone
615  * then it's not busy. (This check is needed to handle the race condition
616  * that a checkpoint already deleted the no-longer-needed file.)
617  */
618 bool
619 XLogArchiveIsBusy(const char *xlog)
620 {
621  char archiveStatusPath[MAXPGPATH];
622  struct stat stat_buf;
623 
624  /* First check for .done --- this means archiver is done with it */
625  StatusFilePath(archiveStatusPath, xlog, ".done");
626  if (stat(archiveStatusPath, &stat_buf) == 0)
627  return false;
628 
629  /* check for .ready --- this means archiver is still busy with it */
630  StatusFilePath(archiveStatusPath, xlog, ".ready");
631  if (stat(archiveStatusPath, &stat_buf) == 0)
632  return true;
633 
634  /* Race condition --- maybe archiver just finished, so recheck */
635  StatusFilePath(archiveStatusPath, xlog, ".done");
636  if (stat(archiveStatusPath, &stat_buf) == 0)
637  return false;
638 
639  /*
640  * Check to see if the WAL file has been removed by checkpoint, which
641  * implies it has already been archived, and explains why we can't see a
642  * status file for it.
643  */
644  snprintf(archiveStatusPath, MAXPGPATH, XLOGDIR "/%s", xlog);
645  if (stat(archiveStatusPath, &stat_buf) != 0 &&
646  errno == ENOENT)
647  return false;
648 
649  return true;
650 }
651 
652 /*
653  * XLogArchiveIsReadyOrDone
654  *
655  * Check to see if an XLOG segment file has a .ready or .done file.
656  * This is similar to XLogArchiveIsBusy(), but returns true if the file
657  * is already archived or is about to be archived.
658  *
659  * This is currently only used at recovery. During normal operation this
660  * would be racy: the file might get removed or marked with .ready as we're
661  * checking it, or immediately after we return.
662  */
663 bool
664 XLogArchiveIsReadyOrDone(const char *xlog)
665 {
666  char archiveStatusPath[MAXPGPATH];
667  struct stat stat_buf;
668 
669  /* First check for .done --- this means archiver is done with it */
670  StatusFilePath(archiveStatusPath, xlog, ".done");
671  if (stat(archiveStatusPath, &stat_buf) == 0)
672  return true;
673 
674  /* check for .ready --- this means archiver is still busy with it */
675  StatusFilePath(archiveStatusPath, xlog, ".ready");
676  if (stat(archiveStatusPath, &stat_buf) == 0)
677  return true;
678 
679  /* Race condition --- maybe archiver just finished, so recheck */
680  StatusFilePath(archiveStatusPath, xlog, ".done");
681  if (stat(archiveStatusPath, &stat_buf) == 0)
682  return true;
683 
684  return false;
685 }
686 
687 /*
688  * XLogArchiveIsReady
689  *
690  * Check to see if an XLOG segment file has an archive notification (.ready)
691  * file.
692  */
693 bool
694 XLogArchiveIsReady(const char *xlog)
695 {
696  char archiveStatusPath[MAXPGPATH];
697  struct stat stat_buf;
698 
699  StatusFilePath(archiveStatusPath, xlog, ".ready");
700  if (stat(archiveStatusPath, &stat_buf) == 0)
701  return true;
702 
703  return false;
704 }
705 
706 /*
707  * XLogArchiveCleanup
708  *
709  * Cleanup archive notification file(s) for a particular xlog segment
710  */
711 void
712 XLogArchiveCleanup(const char *xlog)
713 {
714  char archiveStatusPath[MAXPGPATH];
715 
716  /* Remove the .done file */
717  StatusFilePath(archiveStatusPath, xlog, ".done");
718  unlink(archiveStatusPath);
719  /* should we complain about failure? */
720 
721  /* Remove the .ready file if present --- normally it shouldn't be */
722  StatusFilePath(archiveStatusPath, xlog, ".ready");
723  unlink(archiveStatusPath);
724  /* should we complain about failure? */
725 }
void PreRestoreCommand(void)
Definition: startup.c:268
void PostRestoreCommand(void)
Definition: startup.c:282
unsigned int uint32
Definition: c.h:506
#define Assert(condition)
Definition: c.h:858
char * BuildRestoreCommand(const char *restoreCommand, const char *xlogpath, const char *xlogfname, const char *lastRestartPointFname)
Definition: archive.c:39
int errmsg_internal(const char *fmt,...)
Definition: elog.c:1157
int errcode_for_file_access(void)
Definition: elog.c:880
int errdetail(const char *fmt,...)
Definition: elog.c:1203
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define LOG
Definition: elog.h:31
#define DEBUG3
Definition: elog.h:28
#define FATAL
Definition: elog.h:41
#define WARNING
Definition: elog.h:36
#define DEBUG2
Definition: elog.h:29
#define DEBUG1
Definition: elog.h:30
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2583
int durable_rename(const char *oldfile, const char *newfile, int elevel)
Definition: fd.c:782
int FreeFile(FILE *file)
Definition: fd.c:2781
bool IsUnderPostmaster
Definition: globals.c:117
void proc_exit(int code)
Definition: ipc.c:104
static void const char fflush(stdout)
void pfree(void *pointer)
Definition: mcxt.c:1520
static char xlogfpath[MAXPGPATH]
Definition: parsexlog.c:45
char * replace_percent_placeholders(const char *instr, const char *param_name, const char *letters,...)
Definition: percentrepl.c:59
#define MAXPGPATH
void PgArchForceDirScan(void)
Definition: pgarch.c:800
void PgArchWakeup(void)
Definition: pgarch.c:278
#define snprintf
Definition: port.h:238
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
static int fd(const char *x, int i)
Definition: preproc-init.c:105
__int64 st_size
Definition: win32_port.h:273
char * wait_result_to_str(int exitstatus)
Definition: wait_error.c:33
bool wait_result_is_signal(int exit_status, int signum)
Definition: wait_error.c:102
bool wait_result_is_any_signal(int exit_status, bool include_command_not_found)
Definition: wait_error.c:121
static void pgstat_report_wait_start(uint32 wait_event_info)
Definition: wait_event.h:82
static void pgstat_report_wait_end(void)
Definition: wait_event.h:98
void WalSndWakeup(bool physical, bool logical)
Definition: walsender.c:3666
void WalSndRqstFileReload(void)
Definition: walsender.c:3537
#define stat
Definition: win32_port.h:284
int XLogArchiveMode
Definition: xlog.c:119
int wal_segment_size
Definition: xlog.c:143
RecoveryState GetRecoveryState(void)
Definition: xlog.c:6326
void GetOldestRestartPoint(XLogRecPtr *oldrecptr, TimeLineID *oldtli)
Definition: xlog.c:9383
#define XLogArchivingActive()
Definition: xlog.h:97
@ ARCHIVE_MODE_ALWAYS
Definition: xlog.h:65
#define XLogArchivingAlways()
Definition: xlog.h:100
@ RECOVERY_STATE_ARCHIVE
Definition: xlog.h:90
static bool IsTLHistoryFileName(const char *fname)
#define MAXFNAMELEN
#define XLOGDIR
static void StatusFilePath(char *path, const char *xlog, const char *suffix)
#define XLByteToSeg(xlrp, logSegNo, wal_segsz_bytes)
static void XLogFileName(char *fname, TimeLineID tli, XLogSegNo logSegNo, int wal_segsz_bytes)
void XLogArchiveForceDone(const char *xlog)
Definition: xlogarchive.c:510
bool XLogArchiveIsReadyOrDone(const char *xlog)
Definition: xlogarchive.c:664
bool XLogArchiveIsBusy(const char *xlog)
Definition: xlogarchive.c:619
bool XLogArchiveIsReady(const char *xlog)
Definition: xlogarchive.c:694
void XLogArchiveNotifySeg(XLogSegNo segno, TimeLineID tli)
Definition: xlogarchive.c:492
void ExecuteRecoveryCommand(const char *command, const char *commandName, bool failOnSignal, uint32 wait_event_info)
Definition: xlogarchive.c:295
bool XLogArchiveCheckDone(const char *xlog)
Definition: xlogarchive.c:565
bool RestoreArchivedFile(char *path, const char *xlogfname, const char *recovername, off_t expectedSize, bool cleanupEnabled)
Definition: xlogarchive.c:54
void XLogArchiveNotify(const char *xlog)
Definition: xlogarchive.c:444
void KeepFileRestoredFromArchive(const char *path, const char *xlogfname)
Definition: xlogarchive.c:358
void XLogArchiveCleanup(const char *xlog)
Definition: xlogarchive.c:712
uint64 XLogRecPtr
Definition: xlogdefs.h:21
uint32 TimeLineID
Definition: xlogdefs.h:59
uint64 XLogSegNo
Definition: xlogdefs.h:48
bool ArchiveRecoveryRequested
Definition: xlogrecovery.c:137
char * recoveryRestoreCommand
Definition: xlogrecovery.c:82
bool StandbyMode
Definition: xlogrecovery.c:147