Age Owner Branch data TLA Line data Source code
1 : : /*-------------------------------------------------------------------------
2 : : *
3 : : * xlogrecovery.c
4 : : * Functions for WAL recovery, standby mode
5 : : *
6 : : * This source file contains functions controlling WAL recovery.
7 : : * InitWalRecovery() initializes the system for crash or archive recovery,
8 : : * or standby mode, depending on configuration options and the state of
9 : : * the control file and possible backup label file. PerformWalRecovery()
10 : : * performs the actual WAL replay, calling the rmgr-specific redo routines.
11 : : * FinishWalRecovery() performs end-of-recovery checks and cleanup actions,
12 : : * and prepares information needed to initialize the WAL for writes. In
13 : : * addition to these three main functions, there are a bunch of functions
14 : : * for interrogating recovery state and controlling the recovery process.
15 : : *
16 : : *
17 : : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
18 : : * Portions Copyright (c) 1994, Regents of the University of California
19 : : *
20 : : * src/backend/access/transam/xlogrecovery.c
21 : : *
22 : : *-------------------------------------------------------------------------
23 : : */
24 : :
25 : : #include "postgres.h"
26 : :
27 : : #include <ctype.h>
28 : : #include <math.h>
29 : : #include <time.h>
30 : : #include <sys/stat.h>
31 : : #include <sys/time.h>
32 : : #include <unistd.h>
33 : :
34 : : #include "access/timeline.h"
35 : : #include "access/transam.h"
36 : : #include "access/xact.h"
37 : : #include "access/xlog_internal.h"
38 : : #include "access/xlogarchive.h"
39 : : #include "access/xlogprefetcher.h"
40 : : #include "access/xlogreader.h"
41 : : #include "access/xlogrecovery.h"
42 : : #include "access/xlogutils.h"
43 : : #include "backup/basebackup.h"
44 : : #include "catalog/pg_control.h"
45 : : #include "commands/tablespace.h"
46 : : #include "common/file_utils.h"
47 : : #include "miscadmin.h"
48 : : #include "pgstat.h"
49 : : #include "postmaster/bgwriter.h"
50 : : #include "postmaster/startup.h"
51 : : #include "replication/slot.h"
52 : : #include "replication/slotsync.h"
53 : : #include "replication/walreceiver.h"
54 : : #include "storage/fd.h"
55 : : #include "storage/ipc.h"
56 : : #include "storage/latch.h"
57 : : #include "storage/pmsignal.h"
58 : : #include "storage/procarray.h"
59 : : #include "storage/spin.h"
60 : : #include "utils/datetime.h"
61 : : #include "utils/fmgrprotos.h"
62 : : #include "utils/guc_hooks.h"
63 : : #include "utils/pgstat_internal.h"
64 : : #include "utils/pg_lsn.h"
65 : : #include "utils/ps_status.h"
66 : : #include "utils/pg_rusage.h"
67 : :
68 : : /* Unsupported old recovery command file names (relative to $PGDATA) */
69 : : #define RECOVERY_COMMAND_FILE "recovery.conf"
70 : : #define RECOVERY_COMMAND_DONE "recovery.done"
71 : :
72 : : /*
73 : : * GUC support
74 : : */
75 : : const struct config_enum_entry recovery_target_action_options[] = {
76 : : {"pause", RECOVERY_TARGET_ACTION_PAUSE, false},
77 : : {"promote", RECOVERY_TARGET_ACTION_PROMOTE, false},
78 : : {"shutdown", RECOVERY_TARGET_ACTION_SHUTDOWN, false},
79 : : {NULL, 0, false}
80 : : };
81 : :
82 : : /* options formerly taken from recovery.conf for archive recovery */
83 : : char *recoveryRestoreCommand = NULL;
84 : : char *recoveryEndCommand = NULL;
85 : : char *archiveCleanupCommand = NULL;
86 : : RecoveryTargetType recoveryTarget = RECOVERY_TARGET_UNSET;
87 : : bool recoveryTargetInclusive = true;
88 : : int recoveryTargetAction = RECOVERY_TARGET_ACTION_PAUSE;
89 : : TransactionId recoveryTargetXid;
90 : : char *recovery_target_time_string;
91 : : TimestampTz recoveryTargetTime;
92 : : const char *recoveryTargetName;
93 : : XLogRecPtr recoveryTargetLSN;
94 : : int recovery_min_apply_delay = 0;
95 : :
96 : : /* options formerly taken from recovery.conf for XLOG streaming */
97 : : char *PrimaryConnInfo = NULL;
98 : : char *PrimarySlotName = NULL;
99 : : bool wal_receiver_create_temp_slot = false;
100 : :
101 : : /*
102 : : * recoveryTargetTimeLineGoal: what the user requested, if any
103 : : *
104 : : * recoveryTargetTLIRequested: numeric value of requested timeline, if constant
105 : : *
106 : : * recoveryTargetTLI: the currently understood target timeline; changes
107 : : *
108 : : * expectedTLEs: a list of TimeLineHistoryEntries for recoveryTargetTLI and
109 : : * the timelines of its known parents, newest first (so recoveryTargetTLI is
110 : : * always the first list member). Only these TLIs are expected to be seen in
111 : : * the WAL segments we read, and indeed only these TLIs will be considered as
112 : : * candidate WAL files to open at all.
113 : : *
114 : : * curFileTLI: the TLI appearing in the name of the current input WAL file.
115 : : * (This is not necessarily the same as the timeline from which we are
116 : : * replaying WAL, which StartupXLOG calls replayTLI, because we could be
117 : : * scanning data that was copied from an ancestor timeline when the current
118 : : * file was created.) During a sequential scan we do not allow this value
119 : : * to decrease.
120 : : */
121 : : RecoveryTargetTimeLineGoal recoveryTargetTimeLineGoal = RECOVERY_TARGET_TIMELINE_LATEST;
122 : : TimeLineID recoveryTargetTLIRequested = 0;
123 : : TimeLineID recoveryTargetTLI = 0;
124 : : static List *expectedTLEs;
125 : : static TimeLineID curFileTLI;
126 : :
127 : : /*
128 : : * When ArchiveRecoveryRequested is set, archive recovery was requested,
129 : : * ie. signal files were present. When InArchiveRecovery is set, we are
130 : : * currently recovering using offline XLOG archives. These variables are only
131 : : * valid in the startup process.
132 : : *
133 : : * When ArchiveRecoveryRequested is true, but InArchiveRecovery is false, we're
134 : : * currently performing crash recovery using only XLOG files in pg_wal, but
135 : : * will switch to using offline XLOG archives as soon as we reach the end of
136 : : * WAL in pg_wal.
137 : : */
138 : : bool ArchiveRecoveryRequested = false;
139 : : bool InArchiveRecovery = false;
140 : :
141 : : /*
142 : : * When StandbyModeRequested is set, standby mode was requested, i.e.
143 : : * standby.signal file was present. When StandbyMode is set, we are currently
144 : : * in standby mode. These variables are only valid in the startup process.
145 : : * They work similarly to ArchiveRecoveryRequested and InArchiveRecovery.
146 : : */
147 : : static bool StandbyModeRequested = false;
148 : : bool StandbyMode = false;
149 : :
150 : : /* was a signal file present at startup? */
151 : : static bool standby_signal_file_found = false;
152 : : static bool recovery_signal_file_found = false;
153 : :
154 : : /*
155 : : * CheckPointLoc is the position of the checkpoint record that determines
156 : : * where to start the replay. It comes from the backup label file or the
157 : : * control file.
158 : : *
159 : : * RedoStartLSN is the checkpoint's REDO location, also from the backup label
160 : : * file or the control file. In standby mode, XLOG streaming usually starts
161 : : * from the position where an invalid record was found. But if we fail to
162 : : * read even the initial checkpoint record, we use the REDO location instead
163 : : * of the checkpoint location as the start position of XLOG streaming.
164 : : * Otherwise we would have to jump backwards to the REDO location after
165 : : * reading the checkpoint record, because the REDO record can precede the
166 : : * checkpoint record.
167 : : */
168 : : static XLogRecPtr CheckPointLoc = InvalidXLogRecPtr;
169 : : static TimeLineID CheckPointTLI = 0;
170 : : static XLogRecPtr RedoStartLSN = InvalidXLogRecPtr;
171 : : static TimeLineID RedoStartTLI = 0;
172 : :
173 : : /*
174 : : * Local copy of SharedHotStandbyActive variable. False actually means "not
175 : : * known, need to check the shared state".
176 : : */
177 : : static bool LocalHotStandbyActive = false;
178 : :
179 : : /*
180 : : * Local copy of SharedPromoteIsTriggered variable. False actually means "not
181 : : * known, need to check the shared state".
182 : : */
183 : : static bool LocalPromoteIsTriggered = false;
184 : :
185 : : /* Has the recovery code requested a walreceiver wakeup? */
186 : : static bool doRequestWalReceiverReply;
187 : :
188 : : /* XLogReader object used to parse the WAL records */
189 : : static XLogReaderState *xlogreader = NULL;
190 : :
191 : : /* XLogPrefetcher object used to consume WAL records with read-ahead */
192 : : static XLogPrefetcher *xlogprefetcher = NULL;
193 : :
194 : : /* Parameters passed down from ReadRecord to the XLogPageRead callback. */
195 : : typedef struct XLogPageReadPrivate
196 : : {
197 : : int emode;
198 : : bool fetching_ckpt; /* are we fetching a checkpoint record? */
199 : : bool randAccess;
200 : : TimeLineID replayTLI;
201 : : } XLogPageReadPrivate;
202 : :
203 : : /* flag to tell XLogPageRead that we have started replaying */
204 : : static bool InRedo = false;
205 : :
206 : : /*
207 : : * Codes indicating where we got a WAL file from during recovery, or where
208 : : * to attempt to get one.
209 : : */
210 : : typedef enum
211 : : {
212 : : XLOG_FROM_ANY = 0, /* request to read WAL from any source */
213 : : XLOG_FROM_ARCHIVE, /* restored using restore_command */
214 : : XLOG_FROM_PG_WAL, /* existing file in pg_wal */
215 : : XLOG_FROM_STREAM, /* streamed from primary */
216 : : } XLogSource;
217 : :
218 : : /* human-readable names for XLogSources, for debugging output */
219 : : static const char *const xlogSourceNames[] = {"any", "archive", "pg_wal", "stream"};
220 : :
221 : : /*
222 : : * readFile is -1 or a kernel FD for the log file segment that's currently
223 : : * open for reading. readSegNo identifies the segment. readOff is the offset
224 : : * of the page just read, readLen indicates how much of it has been read into
225 : : * readBuf, and readSource indicates where we got the currently open file from.
226 : : *
227 : : * Note: we could use Reserve/ReleaseExternalFD to track consumption of this
228 : : * FD too (like for openLogFile in xlog.c); but it doesn't currently seem
229 : : * worthwhile, since the XLOG is not read by general-purpose sessions.
230 : : */
231 : : static int readFile = -1;
232 : : static XLogSegNo readSegNo = 0;
233 : : static uint32 readOff = 0;
234 : : static uint32 readLen = 0;
235 : : static XLogSource readSource = XLOG_FROM_ANY;
236 : :
237 : : /*
238 : : * Keeps track of which source we're currently reading from. This is
239 : : * different from readSource in that this is always set, even when we don't
240 : : * currently have a WAL file open. If lastSourceFailed is set, our last
241 : : * attempt to read from currentSource failed, and we should try another source
242 : : * next.
243 : : *
244 : : * pendingWalRcvRestart is set when a config change occurs that requires a
245 : : * walreceiver restart. This is only valid in XLOG_FROM_STREAM state.
246 : : */
247 : : static XLogSource currentSource = XLOG_FROM_ANY;
248 : : static bool lastSourceFailed = false;
249 : : static bool pendingWalRcvRestart = false;
250 : :
251 : : /*
252 : : * These variables track when we last obtained some WAL data to process,
253 : : * and where we got it from. (XLogReceiptSource is initially the same as
254 : : * readSource, but readSource gets reset to zero when we don't have data
255 : : * to process right now. It is also different from currentSource, which
256 : : * also changes when we try to read from a source and fail, while
257 : : * XLogReceiptSource tracks where we last successfully read some WAL.)
258 : : */
259 : : static TimestampTz XLogReceiptTime = 0;
260 : : static XLogSource XLogReceiptSource = XLOG_FROM_ANY;
261 : :
262 : : /* Local copy of WalRcv->flushedUpto */
263 : : static XLogRecPtr flushedUpto = 0;
264 : : static TimeLineID receiveTLI = 0;
265 : :
266 : : /*
267 : : * Copy of minRecoveryPoint and backupEndPoint from the control file.
268 : : *
269 : : * In order to reach consistency, we must replay the WAL up to
270 : : * minRecoveryPoint. If backupEndRequired is true, we must also reach
271 : : * backupEndPoint, or if it's invalid, an end-of-backup record corresponding
272 : : * to backupStartPoint.
273 : : *
274 : : * Note: In archive recovery, after consistency has been reached, the
275 : : * functions in xlog.c will start updating minRecoveryPoint in the control
276 : : * file. But this copy of minRecoveryPoint variable reflects the value at the
277 : : * beginning of recovery, and is *not* updated after consistency is reached.
278 : : */
279 : : static XLogRecPtr minRecoveryPoint;
280 : : static TimeLineID minRecoveryPointTLI;
281 : :
282 : : static XLogRecPtr backupStartPoint;
283 : : static XLogRecPtr backupEndPoint;
284 : : static bool backupEndRequired = false;
285 : :
286 : : /*
287 : : * Have we reached a consistent database state? In crash recovery, we have
288 : : * to replay all the WAL, so reachedConsistency is never set. During archive
289 : : * recovery, the database is consistent once minRecoveryPoint is reached.
290 : : *
291 : : * Consistent state means that the system is internally consistent, all
292 : : * the WAL has been replayed up to a certain point, and importantly, there
293 : : * is no trace of later actions on disk.
294 : : *
295 : : * This flag is used only by the startup process and postmaster. When
296 : : * minRecoveryPoint is reached, the startup process sets it to true and
297 : : * sends a PMSIGNAL_RECOVERY_CONSISTENT signal to the postmaster,
298 : : * which then sets it to true upon receiving the signal.
299 : : */
300 : : bool reachedConsistency = false;
301 : :
302 : : /* Buffers dedicated to consistency checks of size BLCKSZ */
303 : : static char *replay_image_masked = NULL;
304 : : static char *primary_image_masked = NULL;
305 : :
306 : :
307 : : /*
308 : : * Shared-memory state for WAL recovery.
309 : : */
310 : : typedef struct XLogRecoveryCtlData
311 : : {
312 : : /*
313 : : * SharedHotStandbyActive indicates if we allow hot standby queries to be
314 : : * run. Protected by info_lck.
315 : : */
316 : : bool SharedHotStandbyActive;
317 : :
318 : : /*
319 : : * SharedPromoteIsTriggered indicates if a standby promotion has been
320 : : * triggered. Protected by info_lck.
321 : : */
322 : : bool SharedPromoteIsTriggered;
323 : :
324 : : /*
325 : : * recoveryWakeupLatch is used to wake up the startup process to continue
326 : : * WAL replay, if it is waiting for WAL to arrive or promotion to be
327 : : * requested.
328 : : *
329 : : * Note that the startup process also uses another latch, its procLatch,
330 : : * to wait for recovery conflict. If we get rid of recoveryWakeupLatch for
331 : : * signaling the startup process in favor of using its procLatch, which
332 : : * comports better with possible generic signal handlers using that latch.
333 : : * But we should not do that because the startup process doesn't assume
334 : : * that it's waken up by walreceiver process or SIGHUP signal handler
335 : : * while it's waiting for recovery conflict. The separate latches,
336 : : * recoveryWakeupLatch and procLatch, should be used for inter-process
337 : : * communication for WAL replay and recovery conflict, respectively.
338 : : */
339 : : Latch recoveryWakeupLatch;
340 : :
341 : : /*
342 : : * Last record successfully replayed.
343 : : */
344 : : XLogRecPtr lastReplayedReadRecPtr; /* start position */
345 : : XLogRecPtr lastReplayedEndRecPtr; /* end+1 position */
346 : : TimeLineID lastReplayedTLI; /* timeline */
347 : :
348 : : /*
349 : : * When we're currently replaying a record, ie. in a redo function,
350 : : * replayEndRecPtr points to the end+1 of the record being replayed,
351 : : * otherwise it's equal to lastReplayedEndRecPtr.
352 : : */
353 : : XLogRecPtr replayEndRecPtr;
354 : : TimeLineID replayEndTLI;
355 : : /* timestamp of last COMMIT/ABORT record replayed (or being replayed) */
356 : : TimestampTz recoveryLastXTime;
357 : :
358 : : /*
359 : : * timestamp of when we started replaying the current chunk of WAL data,
360 : : * only relevant for replication or archive recovery
361 : : */
362 : : TimestampTz currentChunkStartTime;
363 : : /* Recovery pause state */
364 : : RecoveryPauseState recoveryPauseState;
365 : : ConditionVariable recoveryNotPausedCV;
366 : :
367 : : slock_t info_lck; /* locks shared variables shown above */
368 : : } XLogRecoveryCtlData;
369 : :
370 : : static XLogRecoveryCtlData *XLogRecoveryCtl = NULL;
371 : :
372 : : /*
373 : : * abortedRecPtr is the start pointer of a broken record at end of WAL when
374 : : * recovery completes; missingContrecPtr is the location of the first
375 : : * contrecord that went missing. See CreateOverwriteContrecordRecord for
376 : : * details.
377 : : */
378 : : static XLogRecPtr abortedRecPtr;
379 : : static XLogRecPtr missingContrecPtr;
380 : :
381 : : /*
382 : : * if recoveryStopsBefore/After returns true, it saves information of the stop
383 : : * point here
384 : : */
385 : : static TransactionId recoveryStopXid;
386 : : static TimestampTz recoveryStopTime;
387 : : static XLogRecPtr recoveryStopLSN;
388 : : static char recoveryStopName[MAXFNAMELEN];
389 : : static bool recoveryStopAfter;
390 : :
391 : : /* prototypes for local functions */
392 : : static void ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI);
393 : :
394 : : static void EnableStandbyMode(void);
395 : : static void readRecoverySignalFile(void);
396 : : static void validateRecoveryParameters(void);
397 : : static bool read_backup_label(XLogRecPtr *checkPointLoc,
398 : : TimeLineID *backupLabelTLI,
399 : : bool *backupEndRequired, bool *backupFromStandby);
400 : : static bool read_tablespace_map(List **tablespaces);
401 : :
402 : : static void xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI);
403 : : static void CheckRecoveryConsistency(void);
404 : : static void rm_redo_error_callback(void *arg);
405 : : #ifdef WAL_DEBUG
406 : : static void xlog_outrec(StringInfo buf, XLogReaderState *record);
407 : : #endif
408 : : static void xlog_block_info(StringInfo buf, XLogReaderState *record);
409 : : static void checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI,
410 : : TimeLineID prevTLI, TimeLineID replayTLI);
411 : : static bool getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime);
412 : : static void verifyBackupPageConsistency(XLogReaderState *record);
413 : :
414 : : static bool recoveryStopsBefore(XLogReaderState *record);
415 : : static bool recoveryStopsAfter(XLogReaderState *record);
416 : : static char *getRecoveryStopReason(void);
417 : : static void recoveryPausesHere(bool endOfRecovery);
418 : : static bool recoveryApplyDelay(XLogReaderState *record);
419 : : static void ConfirmRecoveryPaused(void);
420 : :
421 : : static XLogRecord *ReadRecord(XLogPrefetcher *xlogprefetcher,
422 : : int emode, bool fetching_ckpt,
423 : : TimeLineID replayTLI);
424 : :
425 : : static int XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr,
426 : : int reqLen, XLogRecPtr targetRecPtr, char *readBuf);
427 : : static XLogPageReadResult WaitForWALToBecomeAvailable(XLogRecPtr RecPtr,
428 : : bool randAccess,
429 : : bool fetching_ckpt,
430 : : XLogRecPtr tliRecPtr,
431 : : TimeLineID replayTLI,
432 : : XLogRecPtr replayLSN,
433 : : bool nonblocking);
434 : : static int emode_for_corrupt_record(int emode, XLogRecPtr RecPtr);
435 : : static XLogRecord *ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher,
436 : : XLogRecPtr RecPtr, TimeLineID replayTLI);
437 : : static bool rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN);
438 : : static int XLogFileRead(XLogSegNo segno, TimeLineID tli,
439 : : XLogSource source, bool notfoundOk);
440 : : static int XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source);
441 : :
442 : : static bool CheckForStandbyTrigger(void);
443 : : static void SetPromoteIsTriggered(void);
444 : : static bool HotStandbyActiveInReplay(void);
445 : :
446 : : static void SetCurrentChunkStartTime(TimestampTz xtime);
447 : : static void SetLatestXTime(TimestampTz xtime);
448 : :
449 : : /*
450 : : * Initialization of shared memory for WAL recovery
451 : : */
452 : : Size
1298 heikki.linnakangas@i 453 :CBC 2938 : XLogRecoveryShmemSize(void)
454 : : {
455 : : Size size;
456 : :
457 : : /* XLogRecoveryCtl */
458 : 2938 : size = sizeof(XLogRecoveryCtlData);
459 : :
460 : 2938 : return size;
461 : : }
462 : :
463 : : void
464 : 1029 : XLogRecoveryShmemInit(void)
465 : : {
466 : : bool found;
467 : :
468 : 1029 : XLogRecoveryCtl = (XLogRecoveryCtlData *)
469 : 1029 : ShmemInitStruct("XLOG Recovery Ctl", XLogRecoveryShmemSize(), &found);
470 [ - + ]: 1029 : if (found)
1298 heikki.linnakangas@i 471 :UBC 0 : return;
1298 heikki.linnakangas@i 472 :CBC 1029 : memset(XLogRecoveryCtl, 0, sizeof(XLogRecoveryCtlData));
473 : :
474 : 1029 : SpinLockInit(&XLogRecoveryCtl->info_lck);
475 : 1029 : InitSharedLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
476 : 1029 : ConditionVariableInit(&XLogRecoveryCtl->recoveryNotPausedCV);
477 : : }
478 : :
479 : : /*
480 : : * A thin wrapper to enable StandbyMode and do other preparatory work as
481 : : * needed.
482 : : */
483 : : static void
943 rhaas@postgresql.org 484 : 97 : EnableStandbyMode(void)
485 : : {
486 : 97 : StandbyMode = true;
487 : :
488 : : /*
489 : : * To avoid server log bloat, we don't report recovery progress in a
490 : : * standby as it will always be in recovery unless promoted. We disable
491 : : * startup progress timeout in standby mode to avoid calling
492 : : * startup_progress_timeout_handler() unnecessarily.
493 : : */
494 : 97 : disable_startup_progress_timeout();
495 : 97 : }
496 : :
497 : : /*
498 : : * Prepare the system for WAL recovery, if needed.
499 : : *
500 : : * This is called by StartupXLOG() which coordinates the server startup
501 : : * sequence. This function analyzes the control file and the backup label
502 : : * file, if any, and figures out whether we need to perform crash recovery or
503 : : * archive recovery, and how far we need to replay the WAL to reach a
504 : : * consistent state.
505 : : *
506 : : * This doesn't yet change the on-disk state, except for creating the symlinks
507 : : * from table space map file if any, and for fetching WAL files needed to find
508 : : * the checkpoint record. On entry, the caller has already read the control
509 : : * file into memory, and passes it as argument. This function updates it to
510 : : * reflect the recovery state, and the caller is expected to write it back to
511 : : * disk does after initializing other subsystems, but before calling
512 : : * PerformWalRecovery().
513 : : *
514 : : * This initializes some global variables like ArchiveRecoveryRequested, and
515 : : * StandbyModeRequested and InRecovery.
516 : : */
517 : : void
1298 heikki.linnakangas@i 518 : 887 : InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
519 : : bool *haveBackupLabel_ptr, bool *haveTblspcMap_ptr)
520 : : {
521 : : XLogPageReadPrivate *private;
522 : : struct stat st;
523 : : bool wasShutdown;
524 : : XLogRecord *record;
525 : : DBState dbstate_at_startup;
526 : 887 : bool haveTblspcMap = false;
527 : 887 : bool haveBackupLabel = false;
528 : : CheckPoint checkPoint;
529 : 887 : bool backupFromStandby = false;
530 : :
531 : 887 : dbstate_at_startup = ControlFile->state;
532 : :
533 : : /*
534 : : * Initialize on the assumption we want to recover to the latest timeline
535 : : * that's active according to pg_control.
536 : : */
537 : 887 : if (ControlFile->minRecoveryPointTLI >
538 [ + + ]: 887 : ControlFile->checkPointCopy.ThisTimeLineID)
539 : 1 : recoveryTargetTLI = ControlFile->minRecoveryPointTLI;
540 : : else
541 : 886 : recoveryTargetTLI = ControlFile->checkPointCopy.ThisTimeLineID;
542 : :
543 : : /*
544 : : * Check for signal files, and if so set up state for offline recovery
545 : : */
546 : 887 : readRecoverySignalFile();
547 : 887 : validateRecoveryParameters();
548 : :
549 : : /*
550 : : * Take ownership of the wakeup latch if we're going to sleep during
551 : : * recovery, if required.
552 : : */
553 [ + + ]: 887 : if (ArchiveRecoveryRequested)
554 : 102 : OwnLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
555 : :
556 : : /*
557 : : * Set the WAL reading processor now, as it will be needed when reading
558 : : * the checkpoint record required (backup_label or not).
559 : : */
560 : 887 : private = palloc0(sizeof(XLogPageReadPrivate));
561 : 887 : xlogreader =
562 : 887 : XLogReaderAllocate(wal_segment_size, NULL,
563 : 887 : XL_ROUTINE(.page_read = &XLogPageRead,
564 : : .segment_open = NULL,
565 : : .segment_close = wal_segment_close),
566 : : private);
567 [ - + ]: 887 : if (!xlogreader)
1298 heikki.linnakangas@i 568 [ # # ]:UBC 0 : ereport(ERROR,
569 : : (errcode(ERRCODE_OUT_OF_MEMORY),
570 : : errmsg("out of memory"),
571 : : errdetail("Failed while allocating a WAL reading processor.")));
1298 heikki.linnakangas@i 572 :CBC 887 : xlogreader->system_identifier = ControlFile->system_identifier;
573 : :
574 : : /*
575 : : * Set the WAL decode buffer size. This limits how far ahead we can read
576 : : * in the WAL.
577 : : */
1248 tmunro@postgresql.or 578 : 887 : XLogReaderSetDecodeBuffer(xlogreader, NULL, wal_decode_buffer_size);
579 : :
580 : : /* Create a WAL prefetcher. */
581 : 887 : xlogprefetcher = XLogPrefetcherAllocate(xlogreader);
582 : :
583 : : /*
584 : : * Allocate two page buffers dedicated to WAL consistency checks. We do
585 : : * it this way, rather than just making static arrays, for two reasons:
586 : : * (1) no need to waste the storage in most instantiations of the backend;
587 : : * (2) a static char array isn't guaranteed to have any particular
588 : : * alignment, whereas palloc() will provide MAXALIGN'd storage.
589 : : */
1298 heikki.linnakangas@i 590 : 887 : replay_image_masked = (char *) palloc(BLCKSZ);
591 : 887 : primary_image_masked = (char *) palloc(BLCKSZ);
592 : :
593 : : /*
594 : : * Read the backup_label file. We want to run this part of the recovery
595 : : * process after checking for signal files and after performing validation
596 : : * of the recovery parameters.
597 : : */
598 [ + + ]: 887 : if (read_backup_label(&CheckPointLoc, &CheckPointTLI, &backupEndRequired,
599 : : &backupFromStandby))
600 : : {
601 : 69 : List *tablespaces = NIL;
602 : :
603 : : /*
604 : : * Archive recovery was requested, and thanks to the backup label
605 : : * file, we know how far we need to replay to reach consistency. Enter
606 : : * archive recovery directly.
607 : : */
608 : 69 : InArchiveRecovery = true;
609 [ + + ]: 69 : if (StandbyModeRequested)
943 rhaas@postgresql.org 610 : 58 : EnableStandbyMode();
611 : :
612 : : /*
613 : : * Omitting backup_label when creating a new replica, PITR node etc.
614 : : * unfortunately is a common cause of corruption. Logging that
615 : : * backup_label was used makes it a bit easier to exclude that as the
616 : : * cause of observed corruption.
617 : : *
618 : : * Do so before we try to read the checkpoint record (which can fail),
619 : : * as otherwise it can be hard to understand why a checkpoint other
620 : : * than ControlFile->checkPoint is used.
621 : : */
590 michael@paquier.xyz 622 [ + - ]: 69 : ereport(LOG,
623 : : errmsg("starting backup recovery with redo LSN %X/%08X, checkpoint LSN %X/%08X, on timeline ID %u",
624 : : LSN_FORMAT_ARGS(RedoStartLSN),
625 : : LSN_FORMAT_ARGS(CheckPointLoc),
626 : : CheckPointTLI));
627 : :
628 : : /*
629 : : * When a backup_label file is present, we want to roll forward from
630 : : * the checkpoint it identifies, rather than using pg_control.
631 : : */
1144 fujii@postgresql.org 632 : 69 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
633 : : CheckPointTLI);
1298 heikki.linnakangas@i 634 [ + - ]: 69 : if (record != NULL)
635 : : {
636 : 69 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
637 : 69 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
638 [ + + ]: 69 : ereport(DEBUG1,
639 : : errmsg_internal("checkpoint record is at %X/%08X",
640 : : LSN_FORMAT_ARGS(CheckPointLoc)));
641 : 69 : InRecovery = true; /* force recovery even if SHUTDOWNED */
642 : :
643 : : /*
644 : : * Make sure that REDO location exists. This may not be the case
645 : : * if there was a crash during an online backup, which left a
646 : : * backup_label around that references a WAL segment that's
647 : : * already been archived.
648 : : */
649 [ + - ]: 69 : if (checkPoint.redo < CheckPointLoc)
650 : : {
1248 tmunro@postgresql.or 651 : 69 : XLogPrefetcherBeginRead(xlogprefetcher, checkPoint.redo);
652 [ - + ]: 69 : if (!ReadRecord(xlogprefetcher, LOG, false,
653 : : checkPoint.ThisTimeLineID))
1298 heikki.linnakangas@i 654 [ # # ]:UBC 0 : ereport(FATAL,
655 : : errmsg("could not find redo location %X/%08X referenced by checkpoint record at %X/%08X",
656 : : LSN_FORMAT_ARGS(checkPoint.redo), LSN_FORMAT_ARGS(CheckPointLoc)),
657 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
658 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
659 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
660 : : DataDir, DataDir, DataDir, DataDir));
661 : : }
662 : : }
663 : : else
664 : : {
665 [ # # ]: 0 : ereport(FATAL,
666 : : errmsg("could not locate required checkpoint record at %X/%08X",
667 : : LSN_FORMAT_ARGS(CheckPointLoc)),
668 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
669 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
670 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
671 : : DataDir, DataDir, DataDir, DataDir));
672 : : wasShutdown = false; /* keep compiler quiet */
673 : : }
674 : :
675 : : /* Read the tablespace_map file if present and create symlinks. */
1298 heikki.linnakangas@i 676 [ + + ]:CBC 69 : if (read_tablespace_map(&tablespaces))
677 : : {
678 : : ListCell *lc;
679 : :
680 [ + - + + : 4 : foreach(lc, tablespaces)
+ + ]
681 : : {
682 : 2 : tablespaceinfo *ti = lfirst(lc);
683 : : char *linkloc;
684 : :
368 michael@paquier.xyz 685 : 2 : linkloc = psprintf("%s/%u", PG_TBLSPC_DIR, ti->oid);
686 : :
687 : : /*
688 : : * Remove the existing symlink if any and Create the symlink
689 : : * under PGDATA.
690 : : */
1298 heikki.linnakangas@i 691 : 2 : remove_tablespace_symlink(linkloc);
692 : :
693 [ - + ]: 2 : if (symlink(ti->path, linkloc) < 0)
1298 heikki.linnakangas@i 694 [ # # ]:UBC 0 : ereport(ERROR,
695 : : (errcode_for_file_access(),
696 : : errmsg("could not create symbolic link \"%s\": %m",
697 : : linkloc)));
698 : :
1298 heikki.linnakangas@i 699 :CBC 2 : pfree(ti->path);
700 : 2 : pfree(ti);
701 : : }
702 : :
703 : : /* tell the caller to delete it later */
704 : 2 : haveTblspcMap = true;
705 : : }
706 : :
707 : : /* tell the caller to delete it later */
708 : 69 : haveBackupLabel = true;
709 : : }
710 : : else
711 : : {
712 : : /* No backup_label file has been found if we are here. */
713 : :
714 : : /*
715 : : * If tablespace_map file is present without backup_label file, there
716 : : * is no use of such file. There is no harm in retaining it, but it
717 : : * is better to get rid of the map file so that we don't have any
718 : : * redundant file in data directory and it will avoid any sort of
719 : : * confusion. It seems prudent though to just rename the file out of
720 : : * the way rather than delete it completely, also we ignore any error
721 : : * that occurs in rename operation as even if map file is present
722 : : * without backup_label file, it is harmless.
723 : : */
724 [ + + ]: 818 : if (stat(TABLESPACE_MAP, &st) == 0)
725 : : {
726 : 1 : unlink(TABLESPACE_MAP_OLD);
727 [ + - ]: 1 : if (durable_rename(TABLESPACE_MAP, TABLESPACE_MAP_OLD, DEBUG1) == 0)
728 [ + - ]: 1 : ereport(LOG,
729 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
730 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
731 : : errdetail("File \"%s\" was renamed to \"%s\".",
732 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
733 : : else
1298 heikki.linnakangas@i 734 [ # # ]:UBC 0 : ereport(LOG,
735 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
736 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
737 : : errdetail("Could not rename file \"%s\" to \"%s\": %m.",
738 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
739 : : }
740 : :
741 : : /*
742 : : * It's possible that archive recovery was requested, but we don't
743 : : * know how far we need to replay the WAL before we reach consistency.
744 : : * This can happen for example if a base backup is taken from a
745 : : * running server using an atomic filesystem snapshot, without calling
746 : : * pg_backup_start/stop. Or if you just kill a running primary server
747 : : * and put it into archive recovery by creating a recovery signal
748 : : * file.
749 : : *
750 : : * Our strategy in that case is to perform crash recovery first,
751 : : * replaying all the WAL present in pg_wal, and only enter archive
752 : : * recovery after that.
753 : : *
754 : : * But usually we already know how far we need to replay the WAL (up
755 : : * to minRecoveryPoint, up to backupEndPoint, or until we see an
756 : : * end-of-backup record), and we can enter archive recovery directly.
757 : : */
1298 heikki.linnakangas@i 758 [ + + ]:CBC 818 : if (ArchiveRecoveryRequested &&
759 [ + + ]: 39 : (ControlFile->minRecoveryPoint != InvalidXLogRecPtr ||
760 [ + - ]: 9 : ControlFile->backupEndRequired ||
761 [ + - ]: 9 : ControlFile->backupEndPoint != InvalidXLogRecPtr ||
762 [ + + ]: 9 : ControlFile->state == DB_SHUTDOWNED))
763 : : {
764 : 37 : InArchiveRecovery = true;
765 [ + - ]: 37 : if (StandbyModeRequested)
943 rhaas@postgresql.org 766 : 37 : EnableStandbyMode();
767 : : }
768 : :
769 : : /*
770 : : * For the same reason as when starting up with backup_label present,
771 : : * emit a log message when we continue initializing from a base
772 : : * backup.
773 : : */
590 michael@paquier.xyz 774 [ - + ]: 818 : if (!XLogRecPtrIsInvalid(ControlFile->backupStartPoint))
590 michael@paquier.xyz 775 [ # # ]:UBC 0 : ereport(LOG,
776 : : errmsg("restarting backup recovery with redo LSN %X/%08X",
777 : : LSN_FORMAT_ARGS(ControlFile->backupStartPoint)));
778 : :
779 : : /* Get the last valid checkpoint record. */
1298 heikki.linnakangas@i 780 :CBC 818 : CheckPointLoc = ControlFile->checkPoint;
781 : 818 : CheckPointTLI = ControlFile->checkPointCopy.ThisTimeLineID;
782 : 818 : RedoStartLSN = ControlFile->checkPointCopy.redo;
783 : 818 : RedoStartTLI = ControlFile->checkPointCopy.ThisTimeLineID;
1144 fujii@postgresql.org 784 : 818 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
785 : : CheckPointTLI);
1298 heikki.linnakangas@i 786 [ + - ]: 818 : if (record != NULL)
787 : : {
788 [ + + ]: 818 : ereport(DEBUG1,
789 : : errmsg_internal("checkpoint record is at %X/%08X",
790 : : LSN_FORMAT_ARGS(CheckPointLoc)));
791 : : }
792 : : else
793 : : {
794 : : /*
795 : : * We used to attempt to go back to a secondary checkpoint record
796 : : * here, but only when not in standby mode. We now just fail if we
797 : : * can't read the last checkpoint because this allows us to
798 : : * simplify processing around checkpoints.
799 : : */
1298 heikki.linnakangas@i 800 [ # # ]:UBC 0 : ereport(PANIC,
801 : : errmsg("could not locate a valid checkpoint record at %X/%08X",
802 : : LSN_FORMAT_ARGS(CheckPointLoc)));
803 : : }
1298 heikki.linnakangas@i 804 :CBC 818 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
805 : 818 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
806 : : }
807 : :
677 michael@paquier.xyz 808 [ + + ]: 887 : if (ArchiveRecoveryRequested)
809 : : {
810 [ + + ]: 102 : if (StandbyModeRequested)
811 [ + - ]: 97 : ereport(LOG,
812 : : (errmsg("entering standby mode")));
813 [ - + ]: 5 : else if (recoveryTarget == RECOVERY_TARGET_XID)
677 michael@paquier.xyz 814 [ # # ]:UBC 0 : ereport(LOG,
815 : : (errmsg("starting point-in-time recovery to XID %u",
816 : : recoveryTargetXid)));
677 michael@paquier.xyz 817 [ - + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
677 michael@paquier.xyz 818 [ # # ]:UBC 0 : ereport(LOG,
819 : : (errmsg("starting point-in-time recovery to %s",
820 : : timestamptz_to_str(recoveryTargetTime))));
677 michael@paquier.xyz 821 [ + + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
822 [ + - ]: 3 : ereport(LOG,
823 : : (errmsg("starting point-in-time recovery to \"%s\"",
824 : : recoveryTargetName)));
825 [ - + ]: 2 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
677 michael@paquier.xyz 826 [ # # ]:UBC 0 : ereport(LOG,
827 : : errmsg("starting point-in-time recovery to WAL location (LSN) \"%X/%08X\"",
828 : : LSN_FORMAT_ARGS(recoveryTargetLSN)));
677 michael@paquier.xyz 829 [ - + ]:CBC 2 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
677 michael@paquier.xyz 830 [ # # ]:UBC 0 : ereport(LOG,
831 : : (errmsg("starting point-in-time recovery to earliest consistent point")));
832 : : else
677 michael@paquier.xyz 833 [ + - ]:CBC 2 : ereport(LOG,
834 : : (errmsg("starting archive recovery")));
835 : : }
836 : :
837 : : /*
838 : : * If the location of the checkpoint record is not on the expected
839 : : * timeline in the history of the requested timeline, we cannot proceed:
840 : : * the backup is not part of the history of the requested timeline.
841 : : */
1298 heikki.linnakangas@i 842 [ - + ]: 887 : Assert(expectedTLEs); /* was initialized by reading checkpoint
843 : : * record */
844 [ - + ]: 887 : if (tliOfPointInHistory(CheckPointLoc, expectedTLEs) !=
845 : : CheckPointTLI)
846 : : {
847 : : XLogRecPtr switchpoint;
848 : :
849 : : /*
850 : : * tliSwitchPoint will throw an error if the checkpoint's timeline is
851 : : * not in expectedTLEs at all.
852 : : */
198 michael@paquier.xyz 853 :UBC 0 : switchpoint = tliSwitchPoint(CheckPointTLI, expectedTLEs, NULL);
1298 heikki.linnakangas@i 854 [ # # # # ]: 0 : ereport(FATAL,
855 : : (errmsg("requested timeline %u is not a child of this server's history",
856 : : recoveryTargetTLI),
857 : : /* translator: %s is a backup_label file or a pg_control file */
858 : : errdetail("Latest checkpoint in file \"%s\" is at %X/%08X on timeline %u, but in the history of the requested timeline, the server forked off from that timeline at %X/%08X.",
859 : : haveBackupLabel ? "backup_label" : "pg_control",
860 : : LSN_FORMAT_ARGS(CheckPointLoc),
861 : : CheckPointTLI,
862 : : LSN_FORMAT_ARGS(switchpoint))));
863 : : }
864 : :
865 : : /*
866 : : * The min recovery point should be part of the requested timeline's
867 : : * history, too.
868 : : */
1298 heikki.linnakangas@i 869 [ + + ]:CBC 887 : if (!XLogRecPtrIsInvalid(ControlFile->minRecoveryPoint) &&
870 : 35 : tliOfPointInHistory(ControlFile->minRecoveryPoint - 1, expectedTLEs) !=
871 [ - + ]: 35 : ControlFile->minRecoveryPointTLI)
1298 heikki.linnakangas@i 872 [ # # ]:UBC 0 : ereport(FATAL,
873 : : errmsg("requested timeline %u does not contain minimum recovery point %X/%08X on timeline %u",
874 : : recoveryTargetTLI,
875 : : LSN_FORMAT_ARGS(ControlFile->minRecoveryPoint),
876 : : ControlFile->minRecoveryPointTLI));
877 : :
1298 heikki.linnakangas@i 878 [ + + + + ]:CBC 887 : ereport(DEBUG1,
879 : : errmsg_internal("redo record is at %X/%08X; shutdown %s",
880 : : LSN_FORMAT_ARGS(checkPoint.redo),
881 : : wasShutdown ? "true" : "false"));
882 [ + + ]: 887 : ereport(DEBUG1,
883 : : (errmsg_internal("next transaction ID: " UINT64_FORMAT "; next OID: %u",
884 : : U64FromFullTransactionId(checkPoint.nextXid),
885 : : checkPoint.nextOid)));
886 [ + + ]: 887 : ereport(DEBUG1,
887 : : (errmsg_internal("next MultiXactId: %u; next MultiXactOffset: %u",
888 : : checkPoint.nextMulti, checkPoint.nextMultiOffset)));
889 [ + + ]: 887 : ereport(DEBUG1,
890 : : (errmsg_internal("oldest unfrozen transaction ID: %u, in database %u",
891 : : checkPoint.oldestXid, checkPoint.oldestXidDB)));
892 [ + + ]: 887 : ereport(DEBUG1,
893 : : (errmsg_internal("oldest MultiXactId: %u, in database %u",
894 : : checkPoint.oldestMulti, checkPoint.oldestMultiDB)));
895 [ + + ]: 887 : ereport(DEBUG1,
896 : : (errmsg_internal("commit timestamp Xid oldest/newest: %u/%u",
897 : : checkPoint.oldestCommitTsXid,
898 : : checkPoint.newestCommitTsXid)));
899 [ - + ]: 887 : if (!TransactionIdIsNormal(XidFromFullTransactionId(checkPoint.nextXid)))
1298 heikki.linnakangas@i 900 [ # # ]:UBC 0 : ereport(PANIC,
901 : : (errmsg("invalid next transaction ID")));
902 : :
903 : : /* sanity check */
1298 heikki.linnakangas@i 904 [ - + ]:CBC 887 : if (checkPoint.redo > CheckPointLoc)
1298 heikki.linnakangas@i 905 [ # # ]:UBC 0 : ereport(PANIC,
906 : : (errmsg("invalid redo in checkpoint record")));
907 : :
908 : : /*
909 : : * Check whether we need to force recovery from WAL. If it appears to
910 : : * have been a clean shutdown and we did not have a recovery signal file,
911 : : * then assume no recovery needed.
912 : : */
1298 heikki.linnakangas@i 913 [ + + ]:CBC 887 : if (checkPoint.redo < CheckPointLoc)
914 : : {
915 [ - + ]: 104 : if (wasShutdown)
1298 heikki.linnakangas@i 916 [ # # ]:UBC 0 : ereport(PANIC,
917 : : (errmsg("invalid redo record in shutdown checkpoint")));
1298 heikki.linnakangas@i 918 :CBC 104 : InRecovery = true;
919 : : }
920 [ + + ]: 783 : else if (ControlFile->state != DB_SHUTDOWNED)
921 : 93 : InRecovery = true;
922 [ + + ]: 690 : else if (ArchiveRecoveryRequested)
923 : : {
924 : : /* force recovery due to presence of recovery signal file */
925 : 7 : InRecovery = true;
926 : : }
927 : :
928 : : /*
929 : : * If recovery is needed, update our in-memory copy of pg_control to show
930 : : * that we are recovering and to show the selected checkpoint as the place
931 : : * we are starting from. We also mark pg_control with any minimum recovery
932 : : * stop point obtained from a backup history file.
933 : : *
934 : : * We don't write the changes to disk yet, though. Only do that after
935 : : * initializing various subsystems.
936 : : */
937 [ + + ]: 887 : if (InRecovery)
938 : : {
939 [ + + ]: 204 : if (InArchiveRecovery)
940 : : {
941 : 106 : ControlFile->state = DB_IN_ARCHIVE_RECOVERY;
942 : : }
943 : : else
944 : : {
945 [ + - ]: 98 : ereport(LOG,
946 : : (errmsg("database system was not properly shut down; "
947 : : "automatic recovery in progress")));
948 [ + + ]: 98 : if (recoveryTargetTLI > ControlFile->checkPointCopy.ThisTimeLineID)
949 [ + - ]: 1 : ereport(LOG,
950 : : (errmsg("crash recovery starts in timeline %u "
951 : : "and has target timeline %u",
952 : : ControlFile->checkPointCopy.ThisTimeLineID,
953 : : recoveryTargetTLI)));
954 : 98 : ControlFile->state = DB_IN_CRASH_RECOVERY;
955 : : }
956 : 204 : ControlFile->checkPoint = CheckPointLoc;
957 : 204 : ControlFile->checkPointCopy = checkPoint;
958 [ + + ]: 204 : if (InArchiveRecovery)
959 : : {
960 : : /* initialize minRecoveryPoint if not set yet */
961 [ + + ]: 106 : if (ControlFile->minRecoveryPoint < checkPoint.redo)
962 : : {
963 : 72 : ControlFile->minRecoveryPoint = checkPoint.redo;
964 : 72 : ControlFile->minRecoveryPointTLI = checkPoint.ThisTimeLineID;
965 : : }
966 : : }
967 : :
968 : : /*
969 : : * Set backupStartPoint if we're starting recovery from a base backup.
970 : : *
971 : : * Also set backupEndPoint and use minRecoveryPoint as the backup end
972 : : * location if we're starting recovery from a base backup which was
973 : : * taken from a standby. In this case, the database system status in
974 : : * pg_control must indicate that the database was already in recovery.
975 : : * Usually that will be DB_IN_ARCHIVE_RECOVERY but also can be
976 : : * DB_SHUTDOWNED_IN_RECOVERY if recovery previously was interrupted
977 : : * before reaching this point; e.g. because restore_command or
978 : : * primary_conninfo were faulty.
979 : : *
980 : : * Any other state indicates that the backup somehow became corrupted
981 : : * and we can't sensibly continue with recovery.
982 : : */
983 [ + + ]: 204 : if (haveBackupLabel)
984 : : {
985 : 69 : ControlFile->backupStartPoint = checkPoint.redo;
986 : 69 : ControlFile->backupEndRequired = backupEndRequired;
987 : :
988 [ + + ]: 69 : if (backupFromStandby)
989 : : {
990 [ - + - - ]: 4 : if (dbstate_at_startup != DB_IN_ARCHIVE_RECOVERY &&
991 : : dbstate_at_startup != DB_SHUTDOWNED_IN_RECOVERY)
1298 heikki.linnakangas@i 992 [ # # ]:UBC 0 : ereport(FATAL,
993 : : (errmsg("backup_label contains data inconsistent with control file"),
994 : : errhint("This means that the backup is corrupted and you will "
995 : : "have to use another backup for recovery.")));
1298 heikki.linnakangas@i 996 :CBC 4 : ControlFile->backupEndPoint = ControlFile->minRecoveryPoint;
997 : : }
998 : : }
999 : : }
1000 : :
1001 : : /* remember these, so that we know when we have reached consistency */
1002 : 887 : backupStartPoint = ControlFile->backupStartPoint;
1003 : 887 : backupEndRequired = ControlFile->backupEndRequired;
1004 : 887 : backupEndPoint = ControlFile->backupEndPoint;
1005 [ + + ]: 887 : if (InArchiveRecovery)
1006 : : {
1007 : 106 : minRecoveryPoint = ControlFile->minRecoveryPoint;
1008 : 106 : minRecoveryPointTLI = ControlFile->minRecoveryPointTLI;
1009 : : }
1010 : : else
1011 : : {
1012 : 781 : minRecoveryPoint = InvalidXLogRecPtr;
1013 : 781 : minRecoveryPointTLI = 0;
1014 : : }
1015 : :
1016 : : /*
1017 : : * Start recovery assuming that the final record isn't lost.
1018 : : */
1019 : 887 : abortedRecPtr = InvalidXLogRecPtr;
1020 : 887 : missingContrecPtr = InvalidXLogRecPtr;
1021 : :
1022 : 887 : *wasShutdown_ptr = wasShutdown;
1023 : 887 : *haveBackupLabel_ptr = haveBackupLabel;
1024 : 887 : *haveTblspcMap_ptr = haveTblspcMap;
1025 : 887 : }
1026 : :
1027 : : /*
1028 : : * See if there are any recovery signal files and if so, set state for
1029 : : * recovery.
1030 : : *
1031 : : * See if there is a recovery command file (recovery.conf), and if so
1032 : : * throw an ERROR since as of PG12 we no longer recognize that.
1033 : : */
1034 : : static void
1035 : 887 : readRecoverySignalFile(void)
1036 : : {
1037 : : struct stat stat_buf;
1038 : :
1039 [ + + ]: 887 : if (IsBootstrapProcessingMode())
1040 : 785 : return;
1041 : :
1042 : : /*
1043 : : * Check for old recovery API file: recovery.conf
1044 : : */
1045 [ - + ]: 837 : if (stat(RECOVERY_COMMAND_FILE, &stat_buf) == 0)
1298 heikki.linnakangas@i 1046 [ # # ]:UBC 0 : ereport(FATAL,
1047 : : (errcode_for_file_access(),
1048 : : errmsg("using recovery command file \"%s\" is not supported",
1049 : : RECOVERY_COMMAND_FILE)));
1050 : :
1051 : : /*
1052 : : * Remove unused .done file, if present. Ignore if absent.
1053 : : */
1298 heikki.linnakangas@i 1054 :CBC 837 : unlink(RECOVERY_COMMAND_DONE);
1055 : :
1056 : : /*
1057 : : * Check for recovery signal files and if found, fsync them since they
1058 : : * represent server state information. We don't sweat too much about the
1059 : : * possibility of fsync failure, however.
1060 : : *
1061 : : * If present, standby signal file takes precedence. If neither is present
1062 : : * then we won't enter archive recovery.
1063 : : */
1064 [ + + ]: 837 : if (stat(STANDBY_SIGNAL_FILE, &stat_buf) == 0)
1065 : : {
1066 : : int fd;
1067 : :
1068 : 97 : fd = BasicOpenFilePerm(STANDBY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1069 : : S_IRUSR | S_IWUSR);
1070 [ + - ]: 97 : if (fd >= 0)
1071 : : {
1072 : 97 : (void) pg_fsync(fd);
1073 : 97 : close(fd);
1074 : : }
1075 : 97 : standby_signal_file_found = true;
1076 : : }
1077 [ + + ]: 740 : else if (stat(RECOVERY_SIGNAL_FILE, &stat_buf) == 0)
1078 : : {
1079 : : int fd;
1080 : :
1081 : 5 : fd = BasicOpenFilePerm(RECOVERY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1082 : : S_IRUSR | S_IWUSR);
1083 [ + - ]: 5 : if (fd >= 0)
1084 : : {
1085 : 5 : (void) pg_fsync(fd);
1086 : 5 : close(fd);
1087 : : }
1088 : 5 : recovery_signal_file_found = true;
1089 : : }
1090 : :
1091 : 837 : StandbyModeRequested = false;
1092 : 837 : ArchiveRecoveryRequested = false;
1093 [ + + ]: 837 : if (standby_signal_file_found)
1094 : : {
1095 : 97 : StandbyModeRequested = true;
1096 : 97 : ArchiveRecoveryRequested = true;
1097 : : }
1098 [ + + ]: 740 : else if (recovery_signal_file_found)
1099 : : {
1100 : 5 : StandbyModeRequested = false;
1101 : 5 : ArchiveRecoveryRequested = true;
1102 : : }
1103 : : else
1104 : 735 : return;
1105 : :
1106 : : /*
1107 : : * We don't support standby mode in standalone backends; that requires
1108 : : * other processes such as the WAL receiver to be alive.
1109 : : */
1110 [ + + - + ]: 102 : if (StandbyModeRequested && !IsUnderPostmaster)
1298 heikki.linnakangas@i 1111 [ # # ]:UBC 0 : ereport(FATAL,
1112 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1113 : : errmsg("standby mode is not supported by single-user servers")));
1114 : : }
1115 : :
1116 : : static void
1298 heikki.linnakangas@i 1117 :CBC 887 : validateRecoveryParameters(void)
1118 : : {
1119 [ + + ]: 887 : if (!ArchiveRecoveryRequested)
1120 : 785 : return;
1121 : :
1122 : : /*
1123 : : * Check for compulsory parameters
1124 : : */
1125 [ + + ]: 102 : if (StandbyModeRequested)
1126 : : {
1127 [ + - + + ]: 97 : if ((PrimaryConnInfo == NULL || strcmp(PrimaryConnInfo, "") == 0) &&
1128 [ + - + + ]: 11 : (recoveryRestoreCommand == NULL || strcmp(recoveryRestoreCommand, "") == 0))
1129 [ + - ]: 2 : ereport(WARNING,
1130 : : (errmsg("specified neither \"primary_conninfo\" nor \"restore_command\""),
1131 : : errhint("The database server will regularly poll the pg_wal subdirectory to check for files placed there.")));
1132 : : }
1133 : : else
1134 : : {
1135 [ + - ]: 5 : if (recoveryRestoreCommand == NULL ||
1136 [ - + ]: 5 : strcmp(recoveryRestoreCommand, "") == 0)
1298 heikki.linnakangas@i 1137 [ # # ]:UBC 0 : ereport(FATAL,
1138 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1139 : : errmsg("must specify \"restore_command\" when standby mode is not enabled")));
1140 : : }
1141 : :
1142 : : /*
1143 : : * Override any inconsistent requests. Note that this is a change of
1144 : : * behaviour in 9.5; prior to this we simply ignored a request to pause if
1145 : : * hot_standby = off, which was surprising behaviour.
1146 : : */
1298 heikki.linnakangas@i 1147 [ + + ]:CBC 102 : if (recoveryTargetAction == RECOVERY_TARGET_ACTION_PAUSE &&
1148 [ + + ]: 95 : !EnableHotStandby)
1149 : 2 : recoveryTargetAction = RECOVERY_TARGET_ACTION_SHUTDOWN;
1150 : :
1151 : : /*
1152 : : * Final parsing of recovery_target_time string; see also
1153 : : * check_recovery_target_time().
1154 : : */
1155 [ - + ]: 102 : if (recoveryTarget == RECOVERY_TARGET_TIME)
1156 : : {
1298 heikki.linnakangas@i 1157 :UBC 0 : recoveryTargetTime = DatumGetTimestampTz(DirectFunctionCall3(timestamptz_in,
1158 : : CStringGetDatum(recovery_target_time_string),
1159 : : ObjectIdGetDatum(InvalidOid),
1160 : : Int32GetDatum(-1)));
1161 : : }
1162 : :
1163 : : /*
1164 : : * If user specified recovery_target_timeline, validate it or compute the
1165 : : * "latest" value. We can't do this until after we've gotten the restore
1166 : : * command and set InArchiveRecovery, because we need to fetch timeline
1167 : : * history files from the archive.
1168 : : */
1298 heikki.linnakangas@i 1169 [ - + ]:CBC 102 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1170 : : {
1298 heikki.linnakangas@i 1171 :UBC 0 : TimeLineID rtli = recoveryTargetTLIRequested;
1172 : :
1173 : : /* Timeline 1 does not have a history file, all else should */
1174 [ # # # # ]: 0 : if (rtli != 1 && !existsTimeLineHistory(rtli))
1175 [ # # ]: 0 : ereport(FATAL,
1176 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1177 : : errmsg("recovery target timeline %u does not exist",
1178 : : rtli)));
1179 : 0 : recoveryTargetTLI = rtli;
1180 : : }
1298 heikki.linnakangas@i 1181 [ + - ]:CBC 102 : else if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
1182 : : {
1183 : : /* We start the "latest" search from pg_control's timeline */
1184 : 102 : recoveryTargetTLI = findNewestTimeLine(recoveryTargetTLI);
1185 : : }
1186 : : else
1187 : : {
1188 : : /*
1189 : : * else we just use the recoveryTargetTLI as already read from
1190 : : * ControlFile
1191 : : */
1298 heikki.linnakangas@i 1192 [ # # ]:UBC 0 : Assert(recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_CONTROLFILE);
1193 : : }
1194 : : }
1195 : :
1196 : : /*
1197 : : * read_backup_label: check to see if a backup_label file is present
1198 : : *
1199 : : * If we see a backup_label during recovery, we assume that we are recovering
1200 : : * from a backup dump file, and we therefore roll forward from the checkpoint
1201 : : * identified by the label file, NOT what pg_control says. This avoids the
1202 : : * problem that pg_control might have been archived one or more checkpoints
1203 : : * later than the start of the dump, and so if we rely on it as the start
1204 : : * point, we will fail to restore a consistent database state.
1205 : : *
1206 : : * Returns true if a backup_label was found (and fills the checkpoint
1207 : : * location and TLI into *checkPointLoc and *backupLabelTLI, respectively);
1208 : : * returns false if not. If this backup_label came from a streamed backup,
1209 : : * *backupEndRequired is set to true. If this backup_label was created during
1210 : : * recovery, *backupFromStandby is set to true.
1211 : : *
1212 : : * Also sets the global variables RedoStartLSN and RedoStartTLI with the LSN
1213 : : * and TLI read from the backup file.
1214 : : */
1215 : : static bool
1298 heikki.linnakangas@i 1216 :CBC 887 : read_backup_label(XLogRecPtr *checkPointLoc, TimeLineID *backupLabelTLI,
1217 : : bool *backupEndRequired, bool *backupFromStandby)
1218 : : {
1219 : : char startxlogfilename[MAXFNAMELEN];
1220 : : TimeLineID tli_from_walseg,
1221 : : tli_from_file;
1222 : : FILE *lfp;
1223 : : char ch;
1224 : : char backuptype[20];
1225 : : char backupfrom[20];
1226 : : char backuplabel[MAXPGPATH];
1227 : : char backuptime[128];
1228 : : uint32 hi,
1229 : : lo;
1230 : :
1231 : : /* suppress possible uninitialized-variable warnings */
1232 : 887 : *checkPointLoc = InvalidXLogRecPtr;
1233 : 887 : *backupLabelTLI = 0;
1234 : 887 : *backupEndRequired = false;
1235 : 887 : *backupFromStandby = false;
1236 : :
1237 : : /*
1238 : : * See if label file is present
1239 : : */
1240 : 887 : lfp = AllocateFile(BACKUP_LABEL_FILE, "r");
1241 [ + + ]: 887 : if (!lfp)
1242 : : {
1243 [ - + ]: 818 : if (errno != ENOENT)
1298 heikki.linnakangas@i 1244 [ # # ]:UBC 0 : ereport(FATAL,
1245 : : (errcode_for_file_access(),
1246 : : errmsg("could not read file \"%s\": %m",
1247 : : BACKUP_LABEL_FILE)));
1298 heikki.linnakangas@i 1248 :CBC 818 : return false; /* it's not there, all is fine */
1249 : : }
1250 : :
1251 : : /*
1252 : : * Read and parse the START WAL LOCATION and CHECKPOINT lines (this code
1253 : : * is pretty crude, but we are not expecting any variability in the file
1254 : : * format).
1255 : : */
61 alvherre@kurilemu.de 1256 [ + - ]:GNC 69 : if (fscanf(lfp, "START WAL LOCATION: %X/%08X (file %08X%16s)%c",
1298 heikki.linnakangas@i 1257 [ - + ]:CBC 69 : &hi, &lo, &tli_from_walseg, startxlogfilename, &ch) != 5 || ch != '\n')
1298 heikki.linnakangas@i 1258 [ # # ]:UBC 0 : ereport(FATAL,
1259 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1260 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1298 heikki.linnakangas@i 1261 :CBC 69 : RedoStartLSN = ((uint64) hi) << 32 | lo;
1262 : 69 : RedoStartTLI = tli_from_walseg;
61 alvherre@kurilemu.de 1263 [ + - ]:GNC 69 : if (fscanf(lfp, "CHECKPOINT LOCATION: %X/%08X%c",
1298 heikki.linnakangas@i 1264 [ - + ]:CBC 69 : &hi, &lo, &ch) != 3 || ch != '\n')
1298 heikki.linnakangas@i 1265 [ # # ]:UBC 0 : ereport(FATAL,
1266 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1267 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1298 heikki.linnakangas@i 1268 :CBC 69 : *checkPointLoc = ((uint64) hi) << 32 | lo;
1269 : 69 : *backupLabelTLI = tli_from_walseg;
1270 : :
1271 : : /*
1272 : : * BACKUP METHOD lets us know if this was a typical backup ("streamed",
1273 : : * which could mean either pg_basebackup or the pg_backup_start/stop
1274 : : * method was used) or if this label came from somewhere else (the only
1275 : : * other option today being from pg_rewind). If this was a streamed
1276 : : * backup then we know that we need to play through until we get to the
1277 : : * end of the WAL which was generated during the backup (at which point we
1278 : : * will have reached consistency and backupEndRequired will be reset to be
1279 : : * false).
1280 : : */
1281 [ + - ]: 69 : if (fscanf(lfp, "BACKUP METHOD: %19s\n", backuptype) == 1)
1282 : : {
1283 [ + + ]: 69 : if (strcmp(backuptype, "streamed") == 0)
1284 : 68 : *backupEndRequired = true;
1285 : : }
1286 : :
1287 : : /*
1288 : : * BACKUP FROM lets us know if this was from a primary or a standby. If
1289 : : * it was from a standby, we'll double-check that the control file state
1290 : : * matches that of a standby.
1291 : : */
1292 [ + - ]: 69 : if (fscanf(lfp, "BACKUP FROM: %19s\n", backupfrom) == 1)
1293 : : {
1294 [ + + ]: 69 : if (strcmp(backupfrom, "standby") == 0)
1295 : 4 : *backupFromStandby = true;
1296 : : }
1297 : :
1298 : : /*
1299 : : * Parse START TIME and LABEL. Those are not mandatory fields for recovery
1300 : : * but checking for their presence is useful for debugging and the next
1301 : : * sanity checks. Cope also with the fact that the result buffers have a
1302 : : * pre-allocated size, hence if the backup_label file has been generated
1303 : : * with strings longer than the maximum assumed here an incorrect parsing
1304 : : * happens. That's fine as only minor consistency checks are done
1305 : : * afterwards.
1306 : : */
1307 [ + - ]: 69 : if (fscanf(lfp, "START TIME: %127[^\n]\n", backuptime) == 1)
1308 [ + + ]: 69 : ereport(DEBUG1,
1309 : : (errmsg_internal("backup time %s in file \"%s\"",
1310 : : backuptime, BACKUP_LABEL_FILE)));
1311 : :
1312 [ + + ]: 69 : if (fscanf(lfp, "LABEL: %1023[^\n]\n", backuplabel) == 1)
1313 [ + + ]: 68 : ereport(DEBUG1,
1314 : : (errmsg_internal("backup label %s in file \"%s\"",
1315 : : backuplabel, BACKUP_LABEL_FILE)));
1316 : :
1317 : : /*
1318 : : * START TIMELINE is new as of 11. Its parsing is not mandatory, still use
1319 : : * it as a sanity check if present.
1320 : : */
1321 [ + + ]: 69 : if (fscanf(lfp, "START TIMELINE: %u\n", &tli_from_file) == 1)
1322 : : {
1323 [ - + ]: 68 : if (tli_from_walseg != tli_from_file)
1298 heikki.linnakangas@i 1324 [ # # ]:UBC 0 : ereport(FATAL,
1325 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1326 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE),
1327 : : errdetail("Timeline ID parsed is %u, but expected %u.",
1328 : : tli_from_file, tli_from_walseg)));
1329 : :
1298 heikki.linnakangas@i 1330 [ + + ]:CBC 68 : ereport(DEBUG1,
1331 : : (errmsg_internal("backup timeline %u in file \"%s\"",
1332 : : tli_from_file, BACKUP_LABEL_FILE)));
1333 : : }
1334 : :
61 alvherre@kurilemu.de 1335 [ - + ]:GNC 69 : if (fscanf(lfp, "INCREMENTAL FROM LSN: %X/%08X\n", &hi, &lo) > 0)
626 rhaas@postgresql.org 1336 [ # # ]:UBC 0 : ereport(FATAL,
1337 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1338 : : errmsg("this is an incremental backup, not a data directory"),
1339 : : errhint("Use pg_combinebackup to reconstruct a valid data directory.")));
1340 : :
1298 heikki.linnakangas@i 1341 [ + - - + ]:CBC 69 : if (ferror(lfp) || FreeFile(lfp))
1298 heikki.linnakangas@i 1342 [ # # ]:UBC 0 : ereport(FATAL,
1343 : : (errcode_for_file_access(),
1344 : : errmsg("could not read file \"%s\": %m",
1345 : : BACKUP_LABEL_FILE)));
1346 : :
1298 heikki.linnakangas@i 1347 :CBC 69 : return true;
1348 : : }
1349 : :
1350 : : /*
1351 : : * read_tablespace_map: check to see if a tablespace_map file is present
1352 : : *
1353 : : * If we see a tablespace_map file during recovery, we assume that we are
1354 : : * recovering from a backup dump file, and we therefore need to create symlinks
1355 : : * as per the information present in tablespace_map file.
1356 : : *
1357 : : * Returns true if a tablespace_map file was found (and fills *tablespaces
1358 : : * with a tablespaceinfo struct for each tablespace listed in the file);
1359 : : * returns false if not.
1360 : : */
1361 : : static bool
1362 : 69 : read_tablespace_map(List **tablespaces)
1363 : : {
1364 : : tablespaceinfo *ti;
1365 : : FILE *lfp;
1366 : : char str[MAXPGPATH];
1367 : : int ch,
1368 : : i,
1369 : : n;
1370 : : bool was_backslash;
1371 : :
1372 : : /*
1373 : : * See if tablespace_map file is present
1374 : : */
1375 : 69 : lfp = AllocateFile(TABLESPACE_MAP, "r");
1376 [ + + ]: 69 : if (!lfp)
1377 : : {
1378 [ - + ]: 67 : if (errno != ENOENT)
1298 heikki.linnakangas@i 1379 [ # # ]:UBC 0 : ereport(FATAL,
1380 : : (errcode_for_file_access(),
1381 : : errmsg("could not read file \"%s\": %m",
1382 : : TABLESPACE_MAP)));
1298 heikki.linnakangas@i 1383 :CBC 67 : return false; /* it's not there, all is fine */
1384 : : }
1385 : :
1386 : : /*
1387 : : * Read and parse the link name and path lines from tablespace_map file
1388 : : * (this code is pretty crude, but we are not expecting any variability in
1389 : : * the file format). De-escape any backslashes that were inserted.
1390 : : */
1391 : 2 : i = 0;
1392 : 2 : was_backslash = false;
1393 [ + + ]: 77 : while ((ch = fgetc(lfp)) != EOF)
1394 : : {
1395 [ + - + + : 75 : if (!was_backslash && (ch == '\n' || ch == '\r'))
- + ]
1396 : 2 : {
1397 : : char *endp;
1398 : :
1399 [ - + ]: 2 : if (i == 0)
1298 heikki.linnakangas@i 1400 :UBC 0 : continue; /* \r immediately followed by \n */
1401 : :
1402 : : /*
1403 : : * The de-escaped line should contain an OID followed by exactly
1404 : : * one space followed by a path. The path might start with
1405 : : * spaces, so don't be too liberal about parsing.
1406 : : */
1298 heikki.linnakangas@i 1407 :CBC 2 : str[i] = '\0';
1408 : 2 : n = 0;
1409 [ + - + + ]: 12 : while (str[n] && str[n] != ' ')
1410 : 10 : n++;
1411 [ + - - + ]: 2 : if (n < 1 || n >= i - 1)
1298 heikki.linnakangas@i 1412 [ # # ]:UBC 0 : ereport(FATAL,
1413 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1414 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1298 heikki.linnakangas@i 1415 :CBC 2 : str[n++] = '\0';
1416 : :
1417 : 2 : ti = palloc0(sizeof(tablespaceinfo));
684 rhaas@postgresql.org 1418 : 2 : errno = 0;
1419 : 2 : ti->oid = strtoul(str, &endp, 10);
1420 [ + - + - : 2 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
684 rhaas@postgresql.org 1421 [ # # ]:UBC 0 : ereport(FATAL,
1422 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1423 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1298 heikki.linnakangas@i 1424 :CBC 2 : ti->path = pstrdup(str + n);
1425 : 2 : *tablespaces = lappend(*tablespaces, ti);
1426 : :
1427 : 2 : i = 0;
1428 : 2 : continue;
1429 : : }
1430 [ + - - + ]: 73 : else if (!was_backslash && ch == '\\')
1298 heikki.linnakangas@i 1431 :UBC 0 : was_backslash = true;
1432 : : else
1433 : : {
1298 heikki.linnakangas@i 1434 [ + - ]:CBC 73 : if (i < sizeof(str) - 1)
1435 : 73 : str[i++] = ch;
1436 : 73 : was_backslash = false;
1437 : : }
1438 : : }
1439 : :
1440 [ + - - + ]: 2 : if (i != 0 || was_backslash) /* last line not terminated? */
1298 heikki.linnakangas@i 1441 [ # # ]:UBC 0 : ereport(FATAL,
1442 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1443 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1444 : :
1298 heikki.linnakangas@i 1445 [ + - - + ]:CBC 2 : if (ferror(lfp) || FreeFile(lfp))
1298 heikki.linnakangas@i 1446 [ # # ]:UBC 0 : ereport(FATAL,
1447 : : (errcode_for_file_access(),
1448 : : errmsg("could not read file \"%s\": %m",
1449 : : TABLESPACE_MAP)));
1450 : :
1298 heikki.linnakangas@i 1451 :CBC 2 : return true;
1452 : : }
1453 : :
1454 : : /*
1455 : : * Finish WAL recovery.
1456 : : *
1457 : : * This does not close the 'xlogreader' yet, because in some cases the caller
1458 : : * still wants to re-read the last checkpoint record by calling
1459 : : * ReadCheckpointRecord().
1460 : : *
1461 : : * Returns the position of the last valid or applied record, after which new
1462 : : * WAL should be appended, information about why recovery was ended, and some
1463 : : * other things. See the EndOfWalRecoveryInfo struct for details.
1464 : : */
1465 : : EndOfWalRecoveryInfo *
1466 : 832 : FinishWalRecovery(void)
1467 : : {
1468 : 832 : EndOfWalRecoveryInfo *result = palloc(sizeof(EndOfWalRecoveryInfo));
1469 : : XLogRecPtr lastRec;
1470 : : TimeLineID lastRecTLI;
1471 : : XLogRecPtr endOfLog;
1472 : :
1473 : : /*
1474 : : * Kill WAL receiver, if it's still running, before we continue to write
1475 : : * the startup checkpoint and aborted-contrecord records. It will trump
1476 : : * over these records and subsequent ones if it's still alive when we
1477 : : * start writing WAL.
1478 : : */
1479 : 832 : XLogShutdownWalRcv();
1480 : :
1481 : : /*
1482 : : * Shutdown the slot sync worker to drop any temporary slots acquired by
1483 : : * it and to prevent it from keep trying to fetch the failover slots.
1484 : : *
1485 : : * We do not update the 'synced' column in 'pg_replication_slots' system
1486 : : * view from true to false here, as any failed update could leave 'synced'
1487 : : * column false for some slots. This could cause issues during slot sync
1488 : : * after restarting the server as a standby. While updating the 'synced'
1489 : : * column after switching to the new timeline is an option, it does not
1490 : : * simplify the handling for the 'synced' column. Therefore, we retain the
1491 : : * 'synced' column as true after promotion as it may provide useful
1492 : : * information about the slot origin.
1493 : : */
562 akapila@postgresql.o 1494 : 832 : ShutDownSlotSync();
1495 : :
1496 : : /*
1497 : : * We are now done reading the xlog from stream. Turn off streaming
1498 : : * recovery to force fetching the files (which would be required at end of
1499 : : * recovery, e.g., timeline history file) from archive or pg_wal.
1500 : : *
1501 : : * Note that standby mode must be turned off after killing WAL receiver,
1502 : : * i.e., calling XLogShutdownWalRcv().
1503 : : */
1298 heikki.linnakangas@i 1504 [ - + ]: 832 : Assert(!WalRcvStreaming());
1505 : 832 : StandbyMode = false;
1506 : :
1507 : : /*
1508 : : * Determine where to start writing WAL next.
1509 : : *
1510 : : * Re-fetch the last valid or last applied record, so we can identify the
1511 : : * exact endpoint of what we consider the valid portion of WAL. There may
1512 : : * be an incomplete continuation record after that, in which case
1513 : : * 'abortedRecPtr' and 'missingContrecPtr' are set and the caller will
1514 : : * write a special OVERWRITE_CONTRECORD message to mark that the rest of
1515 : : * it is intentionally missing. See CreateOverwriteContrecordRecord().
1516 : : *
1517 : : * An important side-effect of this is to load the last page into
1518 : : * xlogreader. The caller uses it to initialize the WAL for writing.
1519 : : */
1520 [ + + ]: 832 : if (!InRecovery)
1521 : : {
1522 : 683 : lastRec = CheckPointLoc;
1523 : 683 : lastRecTLI = CheckPointTLI;
1524 : : }
1525 : : else
1526 : : {
1527 : 149 : lastRec = XLogRecoveryCtl->lastReplayedReadRecPtr;
1528 : 149 : lastRecTLI = XLogRecoveryCtl->lastReplayedTLI;
1529 : : }
1248 tmunro@postgresql.or 1530 : 832 : XLogPrefetcherBeginRead(xlogprefetcher, lastRec);
1531 : 832 : (void) ReadRecord(xlogprefetcher, PANIC, false, lastRecTLI);
1298 heikki.linnakangas@i 1532 : 832 : endOfLog = xlogreader->EndRecPtr;
1533 : :
1534 : : /*
1535 : : * Remember the TLI in the filename of the XLOG segment containing the
1536 : : * end-of-log. It could be different from the timeline that endOfLog
1537 : : * nominally belongs to, if there was a timeline switch in that segment,
1538 : : * and we were reading the old WAL from a segment belonging to a higher
1539 : : * timeline.
1540 : : */
1541 : 832 : result->endOfLogTLI = xlogreader->seg.ws_tli;
1542 : :
1543 [ + + ]: 832 : if (ArchiveRecoveryRequested)
1544 : : {
1545 : : /*
1546 : : * We are no longer in archive recovery state.
1547 : : *
1548 : : * We are now done reading the old WAL. Turn off archive fetching if
1549 : : * it was active.
1550 : : */
1551 [ - + ]: 47 : Assert(InArchiveRecovery);
1552 : 47 : InArchiveRecovery = false;
1553 : :
1554 : : /*
1555 : : * If the ending log segment is still open, close it (to avoid
1556 : : * problems on Windows with trying to rename or delete an open file).
1557 : : */
1558 [ + - ]: 47 : if (readFile >= 0)
1559 : : {
1560 : 47 : close(readFile);
1561 : 47 : readFile = -1;
1562 : : }
1563 : : }
1564 : :
1565 : : /*
1566 : : * Copy the last partial block to the caller, for initializing the WAL
1567 : : * buffer for appending new WAL.
1568 : : */
1569 [ + + ]: 832 : if (endOfLog % XLOG_BLCKSZ != 0)
1570 : : {
1571 : : char *page;
1572 : : int len;
1573 : : XLogRecPtr pageBeginPtr;
1574 : :
1575 : 815 : pageBeginPtr = endOfLog - (endOfLog % XLOG_BLCKSZ);
1576 [ - + ]: 815 : Assert(readOff == XLogSegmentOffset(pageBeginPtr, wal_segment_size));
1577 : :
1578 : : /* Copy the valid part of the last block */
1579 : 815 : len = endOfLog % XLOG_BLCKSZ;
1580 : 815 : page = palloc(len);
1581 : 815 : memcpy(page, xlogreader->readBuf, len);
1582 : :
1583 : 815 : result->lastPageBeginPtr = pageBeginPtr;
1584 : 815 : result->lastPage = page;
1585 : : }
1586 : : else
1587 : : {
1588 : : /* There is no partial block to copy. */
1589 : 17 : result->lastPageBeginPtr = endOfLog;
1590 : 17 : result->lastPage = NULL;
1591 : : }
1592 : :
1593 : : /*
1594 : : * Create a comment for the history file to explain why and where timeline
1595 : : * changed.
1596 : : */
1597 : 832 : result->recoveryStopReason = getRecoveryStopReason();
1598 : :
1599 : 832 : result->lastRec = lastRec;
1600 : 832 : result->lastRecTLI = lastRecTLI;
1601 : 832 : result->endOfLog = endOfLog;
1602 : :
1603 : 832 : result->abortedRecPtr = abortedRecPtr;
1604 : 832 : result->missingContrecPtr = missingContrecPtr;
1605 : :
1606 : 832 : result->standby_signal_file_found = standby_signal_file_found;
1607 : 832 : result->recovery_signal_file_found = recovery_signal_file_found;
1608 : :
1609 : 832 : return result;
1610 : : }
1611 : :
1612 : : /*
1613 : : * Clean up the WAL reader and leftovers from restoring WAL from archive
1614 : : */
1615 : : void
1616 : 832 : ShutdownWalRecovery(void)
1617 : : {
1618 : : char recoveryPath[MAXPGPATH];
1619 : :
1620 : : /* Final update of pg_stat_recovery_prefetch. */
1248 tmunro@postgresql.or 1621 : 832 : XLogPrefetcherComputeStats(xlogprefetcher);
1622 : :
1623 : : /* Shut down xlogreader */
1298 heikki.linnakangas@i 1624 [ + + ]: 832 : if (readFile >= 0)
1625 : : {
1626 : 785 : close(readFile);
1627 : 785 : readFile = -1;
1628 : : }
35 tgl@sss.pgh.pa.us 1629 :GNC 832 : pfree(xlogreader->private_data);
1298 heikki.linnakangas@i 1630 :CBC 832 : XLogReaderFree(xlogreader);
1248 tmunro@postgresql.or 1631 : 832 : XLogPrefetcherFree(xlogprefetcher);
1632 : :
1298 heikki.linnakangas@i 1633 [ + + ]: 832 : if (ArchiveRecoveryRequested)
1634 : : {
1635 : : /*
1636 : : * Since there might be a partial WAL segment named RECOVERYXLOG, get
1637 : : * rid of it.
1638 : : */
1639 : 47 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYXLOG");
1640 : 47 : unlink(recoveryPath); /* ignore any error */
1641 : :
1642 : : /* Get rid of any remaining recovered timeline-history file, too */
1643 : 47 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYHISTORY");
1644 : 47 : unlink(recoveryPath); /* ignore any error */
1645 : : }
1646 : :
1647 : : /*
1648 : : * We don't need the latch anymore. It's not strictly necessary to disown
1649 : : * it, but let's do it for the sake of tidiness.
1650 : : */
1651 [ + + ]: 832 : if (ArchiveRecoveryRequested)
1652 : 47 : DisownLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
1653 : 832 : }
1654 : :
1655 : : /*
1656 : : * Perform WAL recovery.
1657 : : *
1658 : : * If the system was shut down cleanly, this is never called.
1659 : : */
1660 : : void
1661 : 204 : PerformWalRecovery(void)
1662 : : {
1663 : : XLogRecord *record;
1664 : 204 : bool reachedRecoveryTarget = false;
1665 : : TimeLineID replayTLI;
1666 : :
1667 : : /*
1668 : : * Initialize shared variables for tracking progress of WAL replay, as if
1669 : : * we had just replayed the record before the REDO location (or the
1670 : : * checkpoint record itself, if it's a shutdown checkpoint).
1671 : : */
1672 [ - + ]: 204 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1673 [ + + ]: 204 : if (RedoStartLSN < CheckPointLoc)
1674 : : {
1675 : 104 : XLogRecoveryCtl->lastReplayedReadRecPtr = InvalidXLogRecPtr;
1676 : 104 : XLogRecoveryCtl->lastReplayedEndRecPtr = RedoStartLSN;
1677 : 104 : XLogRecoveryCtl->lastReplayedTLI = RedoStartTLI;
1678 : : }
1679 : : else
1680 : : {
1681 : 100 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
1682 : 100 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
1683 : 100 : XLogRecoveryCtl->lastReplayedTLI = CheckPointTLI;
1684 : : }
1685 : 204 : XLogRecoveryCtl->replayEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
1686 : 204 : XLogRecoveryCtl->replayEndTLI = XLogRecoveryCtl->lastReplayedTLI;
1687 : 204 : XLogRecoveryCtl->recoveryLastXTime = 0;
1688 : 204 : XLogRecoveryCtl->currentChunkStartTime = 0;
1689 : 204 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
1690 : 204 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1691 : :
1692 : : /* Also ensure XLogReceiptTime has a sane value */
1693 : 204 : XLogReceiptTime = GetCurrentTimestamp();
1694 : :
1695 : : /*
1696 : : * Let postmaster know we've started redo now, so that it can launch the
1697 : : * archiver if necessary.
1698 : : */
1699 [ + + ]: 204 : if (IsUnderPostmaster)
1700 : 195 : SendPostmasterSignal(PMSIGNAL_RECOVERY_STARTED);
1701 : :
1702 : : /*
1703 : : * Allow read-only connections immediately if we're consistent already.
1704 : : */
1705 : 204 : CheckRecoveryConsistency();
1706 : :
1707 : : /*
1708 : : * Find the first record that logically follows the checkpoint --- it
1709 : : * might physically precede it, though.
1710 : : */
1711 [ + + ]: 204 : if (RedoStartLSN < CheckPointLoc)
1712 : : {
1713 : : /* back up to find the record */
1714 : 104 : replayTLI = RedoStartTLI;
1248 tmunro@postgresql.or 1715 : 104 : XLogPrefetcherBeginRead(xlogprefetcher, RedoStartLSN);
1716 : 104 : record = ReadRecord(xlogprefetcher, PANIC, false, replayTLI);
1717 : :
1718 : : /*
1719 : : * If a checkpoint record's redo pointer points back to an earlier
1720 : : * LSN, the record at that LSN should be an XLOG_CHECKPOINT_REDO
1721 : : * record.
1722 : : */
688 rhaas@postgresql.org 1723 [ + - ]: 104 : if (record->xl_rmid != RM_XLOG_ID ||
1724 [ - + ]: 104 : (record->xl_info & ~XLR_INFO_MASK) != XLOG_CHECKPOINT_REDO)
688 rhaas@postgresql.org 1725 [ # # ]:UBC 0 : ereport(FATAL,
1726 : : errmsg("unexpected record type found at redo point %X/%08X",
1727 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1728 : : }
1729 : : else
1730 : : {
1731 : : /* just have to read next record after CheckPoint */
1298 heikki.linnakangas@i 1732 [ - + ]:CBC 100 : Assert(xlogreader->ReadRecPtr == CheckPointLoc);
1733 : 100 : replayTLI = CheckPointTLI;
1248 tmunro@postgresql.or 1734 : 100 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1735 : : }
1736 : :
1298 heikki.linnakangas@i 1737 [ + + ]: 204 : if (record != NULL)
1738 : : {
1739 : : TimestampTz xtime;
1740 : : PGRUsage ru0;
1741 : :
1742 : 196 : pg_rusage_init(&ru0);
1743 : :
1744 : 196 : InRedo = true;
1745 : :
1249 jdavis@postgresql.or 1746 : 196 : RmgrStartup();
1747 : :
1298 heikki.linnakangas@i 1748 [ + - ]: 196 : ereport(LOG,
1749 : : errmsg("redo starts at %X/%08X",
1750 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1751 : :
1752 : : /* Prepare to report progress of the redo phase. */
1753 [ + + ]: 196 : if (!StandbyMode)
1754 : 104 : begin_startup_progress_phase();
1755 : :
1756 : : /*
1757 : : * main redo apply loop
1758 : : */
1759 : : do
1760 : : {
1761 [ + + ]: 2735753 : if (!StandbyMode)
61 alvherre@kurilemu.de 1762 [ - + - - ]:GNC 262816 : ereport_startup_progress("redo in progress, elapsed time: %ld.%02d s, current LSN: %X/%08X",
1763 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr));
1764 : :
1765 : : #ifdef WAL_DEBUG
1766 : : if (XLOG_DEBUG)
1767 : : {
1768 : : StringInfoData buf;
1769 : :
1770 : : initStringInfo(&buf);
1771 : : appendStringInfo(&buf, "REDO @ %X/%08X; LSN %X/%08X: ",
1772 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1773 : : LSN_FORMAT_ARGS(xlogreader->EndRecPtr));
1774 : : xlog_outrec(&buf, xlogreader);
1775 : : appendStringInfoString(&buf, " - ");
1776 : : xlog_outdesc(&buf, xlogreader);
1777 : : elog(LOG, "%s", buf.data);
1778 : : pfree(buf.data);
1779 : : }
1780 : : #endif
1781 : :
1782 : : /* Handle interrupt signals of startup process */
185 heikki.linnakangas@i 1783 :CBC 2735753 : ProcessStartupProcInterrupts();
1784 : :
1785 : : /*
1786 : : * Pause WAL replay, if requested by a hot-standby session via
1787 : : * SetRecoveryPause().
1788 : : *
1789 : : * Note that we intentionally don't take the info_lck spinlock
1790 : : * here. We might therefore read a slightly stale value of the
1791 : : * recoveryPause flag, but it can't be very stale (no worse than
1792 : : * the last spinlock we did acquire). Since a pause request is a
1793 : : * pretty asynchronous thing anyway, possibly responding to it one
1794 : : * WAL record later than we otherwise would is a minor issue, so
1795 : : * it doesn't seem worth adding another spinlock cycle to prevent
1796 : : * that.
1797 : : */
1298 1798 [ - + ]: 2735753 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1799 : : RECOVERY_NOT_PAUSED)
1298 heikki.linnakangas@i 1800 :UBC 0 : recoveryPausesHere(false);
1801 : :
1802 : : /*
1803 : : * Have we reached our recovery target?
1804 : : */
1298 heikki.linnakangas@i 1805 [ + + ]:CBC 2735753 : if (recoveryStopsBefore(xlogreader))
1806 : : {
1807 : 2 : reachedRecoveryTarget = true;
1808 : 2 : break;
1809 : : }
1810 : :
1811 : : /*
1812 : : * If we've been asked to lag the primary, wait on latch until
1813 : : * enough time has passed.
1814 : : */
1815 [ - + ]: 2735751 : if (recoveryApplyDelay(xlogreader))
1816 : : {
1817 : : /*
1818 : : * We test for paused recovery again here. If user sets
1819 : : * delayed apply, it may be because they expect to pause
1820 : : * recovery in case of problems, so we must test again here
1821 : : * otherwise pausing during the delay-wait wouldn't work.
1822 : : */
1298 heikki.linnakangas@i 1823 [ # # ]:UBC 0 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1824 : : RECOVERY_NOT_PAUSED)
1825 : 0 : recoveryPausesHere(false);
1826 : : }
1827 : :
1828 : : /*
1829 : : * Apply the record
1830 : : */
1298 heikki.linnakangas@i 1831 :CBC 2735751 : ApplyWalRecord(xlogreader, record, &replayTLI);
1832 : :
1833 : : /* Exit loop if we reached inclusive recovery target */
1834 [ + + ]: 2735749 : if (recoveryStopsAfter(xlogreader))
1835 : : {
1836 : 5 : reachedRecoveryTarget = true;
1837 : 5 : break;
1838 : : }
1839 : :
1840 : : /* Else, try to fetch the next WAL record */
1248 tmunro@postgresql.or 1841 : 2735744 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1298 heikki.linnakangas@i 1842 [ + + ]: 2735692 : } while (record != NULL);
1843 : :
1844 : : /*
1845 : : * end of main redo apply loop
1846 : : */
1847 : :
1848 [ + + ]: 142 : if (reachedRecoveryTarget)
1849 : : {
1850 [ - + ]: 7 : if (!reachedConsistency)
1298 heikki.linnakangas@i 1851 [ # # ]:UBC 0 : ereport(FATAL,
1852 : : (errmsg("requested recovery stop point is before consistent recovery point")));
1853 : :
1854 : : /*
1855 : : * This is the last point where we can restart recovery with a new
1856 : : * recovery target, if we shutdown and begin again. After this,
1857 : : * Resource Managers may choose to do permanent corrective actions
1858 : : * at end of recovery.
1859 : : */
1298 heikki.linnakangas@i 1860 [ - + + - ]:CBC 7 : switch (recoveryTargetAction)
1861 : : {
1298 heikki.linnakangas@i 1862 :UBC 0 : case RECOVERY_TARGET_ACTION_SHUTDOWN:
1863 : :
1864 : : /*
1865 : : * exit with special return code to request shutdown of
1866 : : * postmaster. Log messages issued from postmaster.
1867 : : */
1868 : 0 : proc_exit(3);
1869 : :
1298 heikki.linnakangas@i 1870 :CBC 1 : case RECOVERY_TARGET_ACTION_PAUSE:
1871 : 1 : SetRecoveryPause(true);
1872 : 1 : recoveryPausesHere(true);
1873 : :
1874 : : /* drop into promote */
1875 : :
1876 : 7 : case RECOVERY_TARGET_ACTION_PROMOTE:
1877 : 7 : break;
1878 : : }
1879 : : }
1880 : :
1249 jdavis@postgresql.or 1881 : 142 : RmgrCleanup();
1882 : :
1298 heikki.linnakangas@i 1883 [ + - ]: 142 : ereport(LOG,
1884 : : errmsg("redo done at %X/%08X system usage: %s",
1885 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1886 : : pg_rusage_show(&ru0)));
1887 : 142 : xtime = GetLatestXTime();
1888 [ + + ]: 142 : if (xtime)
1889 [ + - ]: 33 : ereport(LOG,
1890 : : (errmsg("last completed transaction was at log time %s",
1891 : : timestamptz_to_str(xtime))));
1892 : :
1893 : 142 : InRedo = false;
1894 : : }
1895 : : else
1896 : : {
1897 : : /* there are no WAL records following the checkpoint */
1898 [ + - ]: 8 : ereport(LOG,
1899 : : (errmsg("redo is not required")));
1900 : : }
1901 : :
1902 : : /*
1903 : : * This check is intentionally after the above log messages that indicate
1904 : : * how far recovery went.
1905 : : */
1906 [ + + ]: 150 : if (ArchiveRecoveryRequested &&
1907 [ + + ]: 48 : recoveryTarget != RECOVERY_TARGET_UNSET &&
1908 [ + + ]: 8 : !reachedRecoveryTarget)
1909 [ + - ]: 1 : ereport(FATAL,
1910 : : (errcode(ERRCODE_CONFIG_FILE_ERROR),
1911 : : errmsg("recovery ended before configured recovery target was reached")));
1912 : 149 : }
1913 : :
1914 : : /*
1915 : : * Subroutine of PerformWalRecovery, to apply one WAL record.
1916 : : */
1917 : : static void
1918 : 2735751 : ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI)
1919 : : {
1920 : : ErrorContextCallback errcallback;
1921 : 2735751 : bool switchedTLI = false;
1922 : :
1923 : : /* Setup error traceback support for ereport() */
1924 : 2735751 : errcallback.callback = rm_redo_error_callback;
282 peter@eisentraut.org 1925 : 2735751 : errcallback.arg = xlogreader;
1298 heikki.linnakangas@i 1926 : 2735751 : errcallback.previous = error_context_stack;
1927 : 2735751 : error_context_stack = &errcallback;
1928 : :
1929 : : /*
1930 : : * TransamVariables->nextXid must be beyond record's xid.
1931 : : */
1932 : 2735751 : AdvanceNextFullTransactionIdPastXid(record->xl_xid);
1933 : :
1934 : : /*
1935 : : * Before replaying this record, check if this record causes the current
1936 : : * timeline to change. The record is already considered to be part of the
1937 : : * new timeline, so we update replayTLI before replaying it. That's
1938 : : * important so that replayEndTLI, which is recorded as the minimum
1939 : : * recovery point's TLI if recovery stops after this record, is set
1940 : : * correctly.
1941 : : */
1942 [ + + ]: 2735751 : if (record->xl_rmid == RM_XLOG_ID)
1943 : : {
1944 : 41435 : TimeLineID newReplayTLI = *replayTLI;
1945 : 41435 : TimeLineID prevReplayTLI = *replayTLI;
1946 : 41435 : uint8 info = record->xl_info & ~XLR_INFO_MASK;
1947 : :
1948 [ + + ]: 41435 : if (info == XLOG_CHECKPOINT_SHUTDOWN)
1949 : : {
1950 : : CheckPoint checkPoint;
1951 : :
1952 : 30 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
1953 : 30 : newReplayTLI = checkPoint.ThisTimeLineID;
1954 : 30 : prevReplayTLI = checkPoint.PrevTimeLineID;
1955 : : }
1956 [ + + ]: 41405 : else if (info == XLOG_END_OF_RECOVERY)
1957 : : {
1958 : : xl_end_of_recovery xlrec;
1959 : :
1960 : 9 : memcpy(&xlrec, XLogRecGetData(xlogreader), sizeof(xl_end_of_recovery));
1961 : 9 : newReplayTLI = xlrec.ThisTimeLineID;
1962 : 9 : prevReplayTLI = xlrec.PrevTimeLineID;
1963 : : }
1964 : :
1965 [ + + ]: 41435 : if (newReplayTLI != *replayTLI)
1966 : : {
1967 : : /* Check that it's OK to switch to this TLI */
1968 : 10 : checkTimeLineSwitch(xlogreader->EndRecPtr,
1969 : : newReplayTLI, prevReplayTLI, *replayTLI);
1970 : :
1971 : : /* Following WAL records should be run with new TLI */
1972 : 10 : *replayTLI = newReplayTLI;
1973 : 10 : switchedTLI = true;
1974 : : }
1975 : : }
1976 : :
1977 : : /*
1978 : : * Update shared replayEndRecPtr before replaying this record, so that
1979 : : * XLogFlush will update minRecoveryPoint correctly.
1980 : : */
1981 [ + + ]: 2735751 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1982 : 2735751 : XLogRecoveryCtl->replayEndRecPtr = xlogreader->EndRecPtr;
1983 : 2735751 : XLogRecoveryCtl->replayEndTLI = *replayTLI;
1984 : 2735751 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1985 : :
1986 : : /*
1987 : : * If we are attempting to enter Hot Standby mode, process XIDs we see
1988 : : */
1989 [ + + ]: 2735751 : if (standbyState >= STANDBY_INITIALIZED &&
1990 [ + + ]: 2492422 : TransactionIdIsValid(record->xl_xid))
1991 : 2436050 : RecordKnownAssignedTransactionIds(record->xl_xid);
1992 : :
1993 : : /*
1994 : : * Some XLOG record types that are related to recovery are processed
1995 : : * directly here, rather than in xlog_redo()
1996 : : */
1997 [ + + ]: 2735751 : if (record->xl_rmid == RM_XLOG_ID)
1998 : 41435 : xlogrecovery_redo(xlogreader, *replayTLI);
1999 : :
2000 : : /* Now apply the WAL record itself */
1249 jdavis@postgresql.or 2001 : 2735751 : GetRmgr(record->xl_rmid).rm_redo(xlogreader);
2002 : :
2003 : : /*
2004 : : * After redo, check whether the backup pages associated with the WAL
2005 : : * record are consistent with the existing pages. This check is done only
2006 : : * if consistency check is enabled for this record.
2007 : : */
1298 heikki.linnakangas@i 2008 [ + + ]: 2735749 : if ((record->xl_info & XLR_CHECK_CONSISTENCY) != 0)
2009 : 2162184 : verifyBackupPageConsistency(xlogreader);
2010 : :
2011 : : /* Pop the error context stack */
2012 : 2735749 : error_context_stack = errcallback.previous;
2013 : :
2014 : : /*
2015 : : * Update lastReplayedEndRecPtr after this record has been successfully
2016 : : * replayed.
2017 : : */
2018 [ + + ]: 2735749 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
2019 : 2735749 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
2020 : 2735749 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
2021 : 2735749 : XLogRecoveryCtl->lastReplayedTLI = *replayTLI;
2022 : 2735749 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
2023 : :
2024 : : /* ------
2025 : : * Wakeup walsenders:
2026 : : *
2027 : : * On the standby, the WAL is flushed first (which will only wake up
2028 : : * physical walsenders) and then applied, which will only wake up logical
2029 : : * walsenders.
2030 : : *
2031 : : * Indeed, logical walsenders on standby can't decode and send data until
2032 : : * it's been applied.
2033 : : *
2034 : : * Physical walsenders don't need to be woken up during replay unless
2035 : : * cascading replication is allowed and time line change occurred (so that
2036 : : * they can notice that they are on a new time line).
2037 : : *
2038 : : * That's why the wake up conditions are for:
2039 : : *
2040 : : * - physical walsenders in case of new time line and cascade
2041 : : * replication is allowed
2042 : : * - logical walsenders in case cascade replication is allowed (could not
2043 : : * be created otherwise)
2044 : : * ------
2045 : : */
882 andres@anarazel.de 2046 [ + + + + ]: 2735749 : if (AllowCascadeReplication())
2047 : 2546592 : WalSndWakeup(switchedTLI, true);
2048 : :
2049 : : /*
2050 : : * If rm_redo called XLogRequestWalReceiverReply, then we wake up the
2051 : : * receiver so that it notices the updated lastReplayedEndRecPtr and sends
2052 : : * a reply to the primary.
2053 : : */
1298 heikki.linnakangas@i 2054 [ + + ]: 2735749 : if (doRequestWalReceiverReply)
2055 : : {
2056 : 2 : doRequestWalReceiverReply = false;
2057 : 2 : WalRcvForceReply();
2058 : : }
2059 : :
2060 : : /* Allow read-only connections if we're consistent now */
2061 : 2735749 : CheckRecoveryConsistency();
2062 : :
2063 : : /* Is this a timeline switch? */
2064 [ + + ]: 2735749 : if (switchedTLI)
2065 : : {
2066 : : /*
2067 : : * Before we continue on the new timeline, clean up any (possibly
2068 : : * bogus) future WAL segments on the old timeline.
2069 : : */
2070 : 10 : RemoveNonParentXlogFiles(xlogreader->EndRecPtr, *replayTLI);
2071 : :
2072 : : /* Reset the prefetcher. */
1248 tmunro@postgresql.or 2073 : 10 : XLogPrefetchReconfigure();
2074 : : }
1298 heikki.linnakangas@i 2075 : 2735749 : }
2076 : :
2077 : : /*
2078 : : * Some XLOG RM record types that are directly related to WAL recovery are
2079 : : * handled here rather than in the xlog_redo()
2080 : : */
2081 : : static void
2082 : 41435 : xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI)
2083 : : {
2084 : 41435 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2085 : 41435 : XLogRecPtr lsn = record->EndRecPtr;
2086 : :
2087 [ - + ]: 41435 : Assert(XLogRecGetRmid(record) == RM_XLOG_ID);
2088 : :
2089 [ + + ]: 41435 : if (info == XLOG_OVERWRITE_CONTRECORD)
2090 : : {
2091 : : /* Verify the payload of a XLOG_OVERWRITE_CONTRECORD record. */
2092 : : xl_overwrite_contrecord xlrec;
2093 : :
2094 : 1 : memcpy(&xlrec, XLogRecGetData(record), sizeof(xl_overwrite_contrecord));
2095 [ - + ]: 1 : if (xlrec.overwritten_lsn != record->overwrittenRecPtr)
61 alvherre@kurilemu.de 2096 [ # # ]:UNC 0 : elog(FATAL, "mismatching overwritten LSN %X/%08X -> %X/%08X",
2097 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2098 : : LSN_FORMAT_ARGS(record->overwrittenRecPtr));
2099 : :
2100 : : /* We have safely skipped the aborted record */
1263 alvherre@alvh.no-ip. 2101 :CBC 1 : abortedRecPtr = InvalidXLogRecPtr;
2102 : 1 : missingContrecPtr = InvalidXLogRecPtr;
2103 : :
1298 heikki.linnakangas@i 2104 [ + - ]: 1 : ereport(LOG,
2105 : : errmsg("successfully skipped missing contrecord at %X/%08X, overwritten at %s",
2106 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2107 : : timestamptz_to_str(xlrec.overwrite_time)));
2108 : :
2109 : : /* Verifying the record should only happen once */
2110 : 1 : record->overwrittenRecPtr = InvalidXLogRecPtr;
2111 : : }
2112 [ + + ]: 41434 : else if (info == XLOG_BACKUP_END)
2113 : : {
2114 : : XLogRecPtr startpoint;
2115 : :
2116 : 81 : memcpy(&startpoint, XLogRecGetData(record), sizeof(startpoint));
2117 : :
2118 [ + + ]: 81 : if (backupStartPoint == startpoint)
2119 : : {
2120 : : /*
2121 : : * We have reached the end of base backup, the point where
2122 : : * pg_backup_stop() was done. The data on disk is now consistent
2123 : : * (assuming we have also reached minRecoveryPoint). Set
2124 : : * backupEndPoint to the current LSN, so that the next call to
2125 : : * CheckRecoveryConsistency() will notice it and do the
2126 : : * end-of-backup processing.
2127 : : */
2128 [ + + ]: 67 : elog(DEBUG1, "end of backup record reached");
2129 : :
2130 : 67 : backupEndPoint = lsn;
2131 : : }
2132 : : else
61 alvherre@kurilemu.de 2133 [ - + ]:GNC 14 : elog(DEBUG1, "saw end-of-backup record for backup starting at %X/%08X, waiting for %X/%08X",
2134 : : LSN_FORMAT_ARGS(startpoint), LSN_FORMAT_ARGS(backupStartPoint));
2135 : : }
1298 heikki.linnakangas@i 2136 :CBC 41435 : }
2137 : :
2138 : : /*
2139 : : * Verify that, in non-test mode, ./pg_tblspc doesn't contain any real
2140 : : * directories.
2141 : : *
2142 : : * Replay of database creation XLOG records for databases that were later
2143 : : * dropped can create fake directories in pg_tblspc. By the time consistency
2144 : : * is reached these directories should have been removed; here we verify
2145 : : * that this did indeed happen. This is to be called at the point where
2146 : : * consistent state is reached.
2147 : : *
2148 : : * allow_in_place_tablespaces turns the PANIC into a WARNING, which is
2149 : : * useful for testing purposes, and also allows for an escape hatch in case
2150 : : * things go south.
2151 : : */
2152 : : static void
1136 alvherre@alvh.no-ip. 2153 : 108 : CheckTablespaceDirectory(void)
2154 : : {
2155 : : DIR *dir;
2156 : : struct dirent *de;
2157 : :
368 michael@paquier.xyz 2158 : 108 : dir = AllocateDir(PG_TBLSPC_DIR);
2159 [ + + ]: 331 : while ((de = ReadDir(dir, PG_TBLSPC_DIR)) != NULL)
2160 : : {
2161 : : char path[MAXPGPATH + sizeof(PG_TBLSPC_DIR)];
2162 : :
2163 : : /* Skip entries of non-oid names */
1136 alvherre@alvh.no-ip. 2164 [ + + ]: 223 : if (strspn(de->d_name, "0123456789") != strlen(de->d_name))
2165 : 216 : continue;
2166 : :
368 michael@paquier.xyz 2167 : 7 : snprintf(path, sizeof(path), "%s/%s", PG_TBLSPC_DIR, de->d_name);
2168 : :
1136 alvherre@alvh.no-ip. 2169 [ + + ]: 7 : if (get_dirent_type(path, de, false, ERROR) != PGFILETYPE_LNK)
2170 [ + - + - ]: 4 : ereport(allow_in_place_tablespaces ? WARNING : PANIC,
2171 : : (errcode(ERRCODE_DATA_CORRUPTED),
2172 : : errmsg("unexpected directory entry \"%s\" found in %s",
2173 : : de->d_name, PG_TBLSPC_DIR),
2174 : : errdetail("All directory entries in %s/ should be symbolic links.",
2175 : : PG_TBLSPC_DIR),
2176 : : errhint("Remove those directories, or set \"allow_in_place_tablespaces\" to ON transiently to let recovery complete.")));
2177 : : }
2178 : 108 : }
2179 : :
2180 : : /*
2181 : : * Checks if recovery has reached a consistent state. When consistency is
2182 : : * reached and we have a valid starting standby snapshot, tell postmaster
2183 : : * that it can start accepting read-only connections.
2184 : : */
2185 : : static void
1298 heikki.linnakangas@i 2186 : 2735955 : CheckRecoveryConsistency(void)
2187 : : {
2188 : : XLogRecPtr lastReplayedEndRecPtr;
2189 : : TimeLineID lastReplayedTLI;
2190 : :
2191 : : /*
2192 : : * During crash recovery, we don't reach a consistent state until we've
2193 : : * replayed all the WAL.
2194 : : */
2195 [ + + ]: 2735955 : if (XLogRecPtrIsInvalid(minRecoveryPoint))
2196 : 257702 : return;
2197 : :
2198 [ - + ]: 2478253 : Assert(InArchiveRecovery);
2199 : :
2200 : : /*
2201 : : * assume that we are called in the startup process, and hence don't need
2202 : : * a lock to read lastReplayedEndRecPtr
2203 : : */
2204 : 2478253 : lastReplayedEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
2205 : 2478253 : lastReplayedTLI = XLogRecoveryCtl->lastReplayedTLI;
2206 : :
2207 : : /*
2208 : : * Have we reached the point where our base backup was completed?
2209 : : */
2210 [ + + ]: 2478253 : if (!XLogRecPtrIsInvalid(backupEndPoint) &&
2211 [ + + ]: 98 : backupEndPoint <= lastReplayedEndRecPtr)
2212 : : {
590 michael@paquier.xyz 2213 : 69 : XLogRecPtr saveBackupStartPoint = backupStartPoint;
2214 : 69 : XLogRecPtr saveBackupEndPoint = backupEndPoint;
2215 : :
1298 heikki.linnakangas@i 2216 [ + + ]: 69 : elog(DEBUG1, "end of backup reached");
2217 : :
2218 : : /*
2219 : : * We have reached the end of base backup, as indicated by pg_control.
2220 : : * Update the control file accordingly.
2221 : : */
2222 : 69 : ReachedEndOfBackup(lastReplayedEndRecPtr, lastReplayedTLI);
2223 : 69 : backupStartPoint = InvalidXLogRecPtr;
2224 : 69 : backupEndPoint = InvalidXLogRecPtr;
2225 : 69 : backupEndRequired = false;
2226 : :
590 michael@paquier.xyz 2227 [ + - ]: 69 : ereport(LOG,
2228 : : errmsg("completed backup recovery with redo LSN %X/%08X and end LSN %X/%08X",
2229 : : LSN_FORMAT_ARGS(saveBackupStartPoint),
2230 : : LSN_FORMAT_ARGS(saveBackupEndPoint)));
2231 : : }
2232 : :
2233 : : /*
2234 : : * Have we passed our safe starting point? Note that minRecoveryPoint is
2235 : : * known to be incorrectly set if recovering from a backup, until the
2236 : : * XLOG_BACKUP_END arrives to advise us of the correct minRecoveryPoint.
2237 : : * All we know prior to that is that we're not consistent yet.
2238 : : */
1298 heikki.linnakangas@i 2239 [ + + + + ]: 2478253 : if (!reachedConsistency && !backupEndRequired &&
2240 [ + + ]: 4889 : minRecoveryPoint <= lastReplayedEndRecPtr)
2241 : : {
2242 : : /*
2243 : : * Check to see if the XLOG sequence contained any unresolved
2244 : : * references to uninitialized pages.
2245 : : */
2246 : 108 : XLogCheckInvalidPages();
2247 : :
2248 : : /*
2249 : : * Check that pg_tblspc doesn't contain any real directories. Replay
2250 : : * of Database/CREATE_* records may have created fictitious tablespace
2251 : : * directories that should have been removed by the time consistency
2252 : : * was reached.
2253 : : */
1136 alvherre@alvh.no-ip. 2254 : 108 : CheckTablespaceDirectory();
2255 : :
1298 heikki.linnakangas@i 2256 : 108 : reachedConsistency = true;
157 fujii@postgresql.org 2257 : 108 : SendPostmasterSignal(PMSIGNAL_RECOVERY_CONSISTENT);
1298 heikki.linnakangas@i 2258 [ + - ]: 108 : ereport(LOG,
2259 : : errmsg("consistent recovery state reached at %X/%08X",
2260 : : LSN_FORMAT_ARGS(lastReplayedEndRecPtr)));
2261 : : }
2262 : :
2263 : : /*
2264 : : * Have we got a valid starting snapshot that will allow queries to be
2265 : : * run? If so, we can tell postmaster that the database is consistent now,
2266 : : * enabling connections.
2267 : : */
2268 [ + + ]: 2478253 : if (standbyState == STANDBY_SNAPSHOT_READY &&
2269 [ + + + + ]: 2478043 : !LocalHotStandbyActive &&
2270 [ + - ]: 100 : reachedConsistency &&
2271 : : IsUnderPostmaster)
2272 : : {
2273 [ - + ]: 100 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
2274 : 100 : XLogRecoveryCtl->SharedHotStandbyActive = true;
2275 : 100 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
2276 : :
2277 : 100 : LocalHotStandbyActive = true;
2278 : :
2279 : 100 : SendPostmasterSignal(PMSIGNAL_BEGIN_HOT_STANDBY);
2280 : : }
2281 : : }
2282 : :
2283 : : /*
2284 : : * Error context callback for errors occurring during rm_redo().
2285 : : */
2286 : : static void
2287 : 88 : rm_redo_error_callback(void *arg)
2288 : : {
2289 : 88 : XLogReaderState *record = (XLogReaderState *) arg;
2290 : : StringInfoData buf;
2291 : :
2292 : 88 : initStringInfo(&buf);
2293 : 88 : xlog_outdesc(&buf, record);
2294 : 88 : xlog_block_info(&buf, record);
2295 : :
2296 : : /* translator: %s is a WAL record description */
61 alvherre@kurilemu.de 2297 :GNC 88 : errcontext("WAL redo at %X/%08X for %s",
1298 heikki.linnakangas@i 2298 :CBC 88 : LSN_FORMAT_ARGS(record->ReadRecPtr),
2299 : : buf.data);
2300 : :
2301 : 88 : pfree(buf.data);
2302 : 88 : }
2303 : :
2304 : : /*
2305 : : * Returns a string describing an XLogRecord, consisting of its identity
2306 : : * optionally followed by a colon, a space, and a further description.
2307 : : */
2308 : : void
2309 : 88 : xlog_outdesc(StringInfo buf, XLogReaderState *record)
2310 : : {
1249 jdavis@postgresql.or 2311 : 88 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
1298 heikki.linnakangas@i 2312 : 88 : uint8 info = XLogRecGetInfo(record);
2313 : : const char *id;
2314 : :
1249 jdavis@postgresql.or 2315 : 88 : appendStringInfoString(buf, rmgr.rm_name);
1298 heikki.linnakangas@i 2316 : 88 : appendStringInfoChar(buf, '/');
2317 : :
1249 jdavis@postgresql.or 2318 : 88 : id = rmgr.rm_identify(info);
1298 heikki.linnakangas@i 2319 [ - + ]: 88 : if (id == NULL)
1298 heikki.linnakangas@i 2320 :UBC 0 : appendStringInfo(buf, "UNKNOWN (%X): ", info & ~XLR_INFO_MASK);
2321 : : else
1298 heikki.linnakangas@i 2322 :CBC 88 : appendStringInfo(buf, "%s: ", id);
2323 : :
1249 jdavis@postgresql.or 2324 : 88 : rmgr.rm_desc(buf, record);
1298 heikki.linnakangas@i 2325 : 88 : }
2326 : :
2327 : : #ifdef WAL_DEBUG
2328 : :
2329 : : static void
2330 : : xlog_outrec(StringInfo buf, XLogReaderState *record)
2331 : : {
2332 : : appendStringInfo(buf, "prev %X/%08X; xid %u",
2333 : : LSN_FORMAT_ARGS(XLogRecGetPrev(record)),
2334 : : XLogRecGetXid(record));
2335 : :
2336 : : appendStringInfo(buf, "; len %u",
2337 : : XLogRecGetDataLen(record));
2338 : :
2339 : : xlog_block_info(buf, record);
2340 : : }
2341 : : #endif /* WAL_DEBUG */
2342 : :
2343 : : /*
2344 : : * Returns a string giving information about all the blocks in an
2345 : : * XLogRecord.
2346 : : */
2347 : : static void
2348 : 88 : xlog_block_info(StringInfo buf, XLogReaderState *record)
2349 : : {
2350 : : int block_id;
2351 : :
2352 : : /* decode block references */
1268 tmunro@postgresql.or 2353 [ + + ]: 137 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2354 : : {
2355 : : RelFileLocator rlocator;
2356 : : ForkNumber forknum;
2357 : : BlockNumber blk;
2358 : :
1244 tgl@sss.pgh.pa.us 2359 [ - + ]: 49 : if (!XLogRecGetBlockTagExtended(record, block_id,
2360 : : &rlocator, &forknum, &blk, NULL))
1298 heikki.linnakangas@i 2361 :LBC (1) : continue;
2362 : :
1298 heikki.linnakangas@i 2363 [ + + ]:CBC 49 : if (forknum != MAIN_FORKNUM)
1074 rhaas@postgresql.org 2364 : 4 : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, fork %u, blk %u",
2365 : : block_id,
2366 : : rlocator.spcOid, rlocator.dbOid,
2367 : : rlocator.relNumber,
2368 : : forknum,
2369 : : blk);
2370 : : else
2371 : 45 : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, blk %u",
2372 : : block_id,
2373 : : rlocator.spcOid, rlocator.dbOid,
2374 : : rlocator.relNumber,
2375 : : blk);
1298 heikki.linnakangas@i 2376 [ + + ]: 49 : if (XLogRecHasBlockImage(record, block_id))
2377 : 39 : appendStringInfoString(buf, " FPW");
2378 : : }
2379 : 88 : }
2380 : :
2381 : :
2382 : : /*
2383 : : * Check that it's OK to switch to new timeline during recovery.
2384 : : *
2385 : : * 'lsn' is the address of the shutdown checkpoint record we're about to
2386 : : * replay. (Currently, timeline can only change at a shutdown checkpoint).
2387 : : */
2388 : : static void
2389 : 10 : checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI, TimeLineID prevTLI,
2390 : : TimeLineID replayTLI)
2391 : : {
2392 : : /* Check that the record agrees on what the current (old) timeline is */
2393 [ - + ]: 10 : if (prevTLI != replayTLI)
1298 heikki.linnakangas@i 2394 [ # # ]:UBC 0 : ereport(PANIC,
2395 : : (errmsg("unexpected previous timeline ID %u (current timeline ID %u) in checkpoint record",
2396 : : prevTLI, replayTLI)));
2397 : :
2398 : : /*
2399 : : * The new timeline better be in the list of timelines we expect to see,
2400 : : * according to the timeline history. It should also not decrease.
2401 : : */
1298 heikki.linnakangas@i 2402 [ + - - + ]:CBC 10 : if (newTLI < replayTLI || !tliInHistory(newTLI, expectedTLEs))
1298 heikki.linnakangas@i 2403 [ # # ]:UBC 0 : ereport(PANIC,
2404 : : (errmsg("unexpected timeline ID %u (after %u) in checkpoint record",
2405 : : newTLI, replayTLI)));
2406 : :
2407 : : /*
2408 : : * If we have not yet reached min recovery point, and we're about to
2409 : : * switch to a timeline greater than the timeline of the min recovery
2410 : : * point: trouble. After switching to the new timeline, we could not
2411 : : * possibly visit the min recovery point on the correct timeline anymore.
2412 : : * This can happen if there is a newer timeline in the archive that
2413 : : * branched before the timeline the min recovery point is on, and you
2414 : : * attempt to do PITR to the new timeline.
2415 : : */
1298 heikki.linnakangas@i 2416 [ + + ]:CBC 10 : if (!XLogRecPtrIsInvalid(minRecoveryPoint) &&
2417 [ + + ]: 9 : lsn < minRecoveryPoint &&
2418 [ - + ]: 1 : newTLI > minRecoveryPointTLI)
1298 heikki.linnakangas@i 2419 [ # # ]:UBC 0 : ereport(PANIC,
2420 : : errmsg("unexpected timeline ID %u in checkpoint record, before reaching minimum recovery point %X/%08X on timeline %u",
2421 : : newTLI,
2422 : : LSN_FORMAT_ARGS(minRecoveryPoint),
2423 : : minRecoveryPointTLI));
2424 : :
2425 : : /* Looks good */
1298 heikki.linnakangas@i 2426 :CBC 10 : }
2427 : :
2428 : :
2429 : : /*
2430 : : * Extract timestamp from WAL record.
2431 : : *
2432 : : * If the record contains a timestamp, returns true, and saves the timestamp
2433 : : * in *recordXtime. If the record type has no timestamp, returns false.
2434 : : * Currently, only transaction commit/abort records and restore points contain
2435 : : * timestamps.
2436 : : */
2437 : : static bool
2438 : 42514 : getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime)
2439 : : {
2440 : 42514 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2441 : 42514 : uint8 xact_info = info & XLOG_XACT_OPMASK;
2442 : 42514 : uint8 rmid = XLogRecGetRmid(record);
2443 : :
2444 [ + + + - ]: 42514 : if (rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2445 : : {
2446 : 2 : *recordXtime = ((xl_restore_point *) XLogRecGetData(record))->rp_time;
2447 : 2 : return true;
2448 : : }
2449 [ + - + + : 42512 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_COMMIT ||
+ + ]
2450 : : xact_info == XLOG_XACT_COMMIT_PREPARED))
2451 : : {
2452 : 38952 : *recordXtime = ((xl_xact_commit *) XLogRecGetData(record))->xact_time;
2453 : 38952 : return true;
2454 : : }
2455 [ + - + + : 3560 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_ABORT ||
+ - ]
2456 : : xact_info == XLOG_XACT_ABORT_PREPARED))
2457 : : {
2458 : 3560 : *recordXtime = ((xl_xact_abort *) XLogRecGetData(record))->xact_time;
2459 : 3560 : return true;
2460 : : }
1298 heikki.linnakangas@i 2461 :UBC 0 : return false;
2462 : : }
2463 : :
2464 : : /*
2465 : : * Checks whether the current buffer page and backup page stored in the
2466 : : * WAL record are consistent or not. Before comparing the two pages, a
2467 : : * masking can be applied to the pages to ignore certain areas like hint bits,
2468 : : * unused space between pd_lower and pd_upper among other things. This
2469 : : * function should be called once WAL replay has been completed for a
2470 : : * given record.
2471 : : */
2472 : : static void
1298 heikki.linnakangas@i 2473 :CBC 2162184 : verifyBackupPageConsistency(XLogReaderState *record)
2474 : : {
1249 jdavis@postgresql.or 2475 : 2162184 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
2476 : : RelFileLocator rlocator;
2477 : : ForkNumber forknum;
2478 : : BlockNumber blkno;
2479 : : int block_id;
2480 : :
2481 : : /* Records with no backup blocks have no need for consistency checks. */
1298 heikki.linnakangas@i 2482 [ + + ]: 2162184 : if (!XLogRecHasAnyBlockRefs(record))
2483 : 90 : return;
2484 : :
2485 [ - + ]: 2162094 : Assert((XLogRecGetInfo(record) & XLR_CHECK_CONSISTENCY) != 0);
2486 : :
1268 tmunro@postgresql.or 2487 [ + + ]: 4492793 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2488 : : {
2489 : : Buffer buf;
2490 : : Page page;
2491 : :
1244 tgl@sss.pgh.pa.us 2492 [ + + ]: 2330699 : if (!XLogRecGetBlockTagExtended(record, block_id,
2493 : : &rlocator, &forknum, &blkno, NULL))
2494 : : {
2495 : : /*
2496 : : * WAL record doesn't contain a block reference with the given id.
2497 : : * Do nothing.
2498 : : */
1298 heikki.linnakangas@i 2499 : 2024 : continue;
2500 : : }
2501 : :
2502 [ - + ]: 2328675 : Assert(XLogRecHasBlockImage(record, block_id));
2503 : :
2504 [ + + ]: 2328675 : if (XLogRecBlockImageApply(record, block_id))
2505 : : {
2506 : : /*
2507 : : * WAL record has already applied the page, so bypass the
2508 : : * consistency check as that would result in comparing the full
2509 : : * page stored in the record with itself.
2510 : : */
2511 : 25270 : continue;
2512 : : }
2513 : :
2514 : : /*
2515 : : * Read the contents from the current buffer and store it in a
2516 : : * temporary page.
2517 : : */
1158 rhaas@postgresql.org 2518 : 2303405 : buf = XLogReadBufferExtended(rlocator, forknum, blkno,
2519 : : RBM_NORMAL_NO_LOG,
2520 : : InvalidBuffer);
1298 heikki.linnakangas@i 2521 [ - + ]: 2303405 : if (!BufferIsValid(buf))
1298 heikki.linnakangas@i 2522 :UBC 0 : continue;
2523 : :
1298 heikki.linnakangas@i 2524 :CBC 2303405 : LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
2525 : 2303405 : page = BufferGetPage(buf);
2526 : :
2527 : : /*
2528 : : * Take a copy of the local page where WAL has been applied to have a
2529 : : * comparison base before masking it...
2530 : : */
2531 : 2303405 : memcpy(replay_image_masked, page, BLCKSZ);
2532 : :
2533 : : /* No need for this page anymore now that a copy is in. */
2534 : 2303405 : UnlockReleaseBuffer(buf);
2535 : :
2536 : : /*
2537 : : * If the block LSN is already ahead of this WAL record, we can't
2538 : : * expect contents to match. This can happen if recovery is
2539 : : * restarted.
2540 : : */
2541 [ - + ]: 2303405 : if (PageGetLSN(replay_image_masked) > record->EndRecPtr)
1298 heikki.linnakangas@i 2542 :UBC 0 : continue;
2543 : :
2544 : : /*
2545 : : * Read the contents from the backup copy, stored in WAL record and
2546 : : * store it in a temporary page. There is no need to allocate a new
2547 : : * page here, a local buffer is fine to hold its contents and a mask
2548 : : * can be directly applied on it.
2549 : : */
1298 heikki.linnakangas@i 2550 [ - + ]:CBC 2303405 : if (!RestoreBlockImage(record, block_id, primary_image_masked))
1093 michael@paquier.xyz 2551 [ # # ]:UBC 0 : ereport(ERROR,
2552 : : (errcode(ERRCODE_INTERNAL_ERROR),
2553 : : errmsg_internal("%s", record->errormsg_buf)));
2554 : :
2555 : : /*
2556 : : * If masking function is defined, mask both the primary and replay
2557 : : * images
2558 : : */
1249 jdavis@postgresql.or 2559 [ + - ]:CBC 2303405 : if (rmgr.rm_mask != NULL)
2560 : : {
2561 : 2303405 : rmgr.rm_mask(replay_image_masked, blkno);
2562 : 2303405 : rmgr.rm_mask(primary_image_masked, blkno);
2563 : : }
2564 : :
2565 : : /* Time to compare the primary and replay images. */
1298 heikki.linnakangas@i 2566 [ - + ]: 2303405 : if (memcmp(replay_image_masked, primary_image_masked, BLCKSZ) != 0)
2567 : : {
1298 heikki.linnakangas@i 2568 [ # # ]:UBC 0 : elog(FATAL,
2569 : : "inconsistent page found, rel %u/%u/%u, forknum %u, blkno %u",
2570 : : rlocator.spcOid, rlocator.dbOid, rlocator.relNumber,
2571 : : forknum, blkno);
2572 : : }
2573 : : }
2574 : : }
2575 : :
2576 : : /*
2577 : : * For point-in-time recovery, this function decides whether we want to
2578 : : * stop applying the XLOG before the current record.
2579 : : *
2580 : : * Returns true if we are stopping, false otherwise. If stopping, some
2581 : : * information is saved in recoveryStopXid et al for use in annotating the
2582 : : * new timeline's history file.
2583 : : */
2584 : : static bool
1298 heikki.linnakangas@i 2585 :CBC 2735753 : recoveryStopsBefore(XLogReaderState *record)
2586 : : {
2587 : 2735753 : bool stopsHere = false;
2588 : : uint8 xact_info;
2589 : : bool isCommit;
2590 : 2735753 : TimestampTz recordXtime = 0;
2591 : : TransactionId recordXid;
2592 : :
2593 : : /*
2594 : : * Ignore recovery target settings when not in archive recovery (meaning
2595 : : * we are in crash recovery).
2596 : : */
2597 [ + + ]: 2735753 : if (!ArchiveRecoveryRequested)
2598 : 243315 : return false;
2599 : :
2600 : : /* Check if we should stop as soon as reaching consistency */
2601 [ - + - - ]: 2492438 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2602 : : {
1298 heikki.linnakangas@i 2603 [ # # ]:UBC 0 : ereport(LOG,
2604 : : (errmsg("recovery stopping after reaching consistency")));
2605 : :
2606 : 0 : recoveryStopAfter = false;
2607 : 0 : recoveryStopXid = InvalidTransactionId;
2608 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2609 : 0 : recoveryStopTime = 0;
2610 : 0 : recoveryStopName[0] = '\0';
2611 : 0 : return true;
2612 : : }
2613 : :
2614 : : /* Check if target LSN has been reached */
1298 heikki.linnakangas@i 2615 [ + + ]:CBC 2492438 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2616 [ + + ]: 8473 : !recoveryTargetInclusive &&
2617 [ + + ]: 420 : record->ReadRecPtr >= recoveryTargetLSN)
2618 : : {
2619 : 2 : recoveryStopAfter = false;
2620 : 2 : recoveryStopXid = InvalidTransactionId;
2621 : 2 : recoveryStopLSN = record->ReadRecPtr;
2622 : 2 : recoveryStopTime = 0;
2623 : 2 : recoveryStopName[0] = '\0';
2624 [ + - ]: 2 : ereport(LOG,
2625 : : errmsg("recovery stopping before WAL location (LSN) \"%X/%08X\"",
2626 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2627 : 2 : return true;
2628 : : }
2629 : :
2630 : : /* Otherwise we only consider stopping before COMMIT or ABORT records. */
2631 [ + + ]: 2492436 : if (XLogRecGetRmid(record) != RM_XACT_ID)
2632 : 2471045 : return false;
2633 : :
2634 : 21391 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
2635 : :
2636 [ + + ]: 21391 : if (xact_info == XLOG_XACT_COMMIT)
2637 : : {
2638 : 19453 : isCommit = true;
2639 : 19453 : recordXid = XLogRecGetXid(record);
2640 : : }
2641 [ + + ]: 1938 : else if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2642 : : {
2643 : 24 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2644 : : xl_xact_parsed_commit parsed;
2645 : :
2646 : 24 : isCommit = true;
2647 : 24 : ParseCommitRecord(XLogRecGetInfo(record),
2648 : : xlrec,
2649 : : &parsed);
2650 : 24 : recordXid = parsed.twophase_xid;
2651 : : }
2652 [ + + ]: 1914 : else if (xact_info == XLOG_XACT_ABORT)
2653 : : {
2654 : 1769 : isCommit = false;
2655 : 1769 : recordXid = XLogRecGetXid(record);
2656 : : }
2657 [ + + ]: 145 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2658 : : {
2659 : 11 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2660 : : xl_xact_parsed_abort parsed;
2661 : :
2662 : 11 : isCommit = false;
2663 : 11 : ParseAbortRecord(XLogRecGetInfo(record),
2664 : : xlrec,
2665 : : &parsed);
2666 : 11 : recordXid = parsed.twophase_xid;
2667 : : }
2668 : : else
2669 : 134 : return false;
2670 : :
2671 [ - + - - ]: 21257 : if (recoveryTarget == RECOVERY_TARGET_XID && !recoveryTargetInclusive)
2672 : : {
2673 : : /*
2674 : : * There can be only one transaction end record with this exact
2675 : : * transactionid
2676 : : *
2677 : : * when testing for an xid, we MUST test for equality only, since
2678 : : * transactions are numbered in the order they start, not the order
2679 : : * they complete. A higher numbered xid will complete before you about
2680 : : * 50% of the time...
2681 : : */
1298 heikki.linnakangas@i 2682 :UBC 0 : stopsHere = (recordXid == recoveryTargetXid);
2683 : : }
2684 : :
2685 : : /*
2686 : : * Note: we must fetch recordXtime regardless of recoveryTarget setting.
2687 : : * We don't expect getRecordTimestamp ever to fail, since we already know
2688 : : * this is a commit or abort record; but test its result anyway.
2689 : : */
961 tgl@sss.pgh.pa.us 2690 [ + - ]:CBC 21257 : if (getRecordTimestamp(record, &recordXtime) &&
2691 [ - + ]: 21257 : recoveryTarget == RECOVERY_TARGET_TIME)
2692 : : {
2693 : : /*
2694 : : * There can be many transactions that share the same commit time, so
2695 : : * we stop after the last one, if we are inclusive, or stop at the
2696 : : * first one if we are exclusive
2697 : : */
1298 heikki.linnakangas@i 2698 [ # # ]:UBC 0 : if (recoveryTargetInclusive)
2699 : 0 : stopsHere = (recordXtime > recoveryTargetTime);
2700 : : else
2701 : 0 : stopsHere = (recordXtime >= recoveryTargetTime);
2702 : : }
2703 : :
1298 heikki.linnakangas@i 2704 [ - + ]:CBC 21257 : if (stopsHere)
2705 : : {
1298 heikki.linnakangas@i 2706 :UBC 0 : recoveryStopAfter = false;
2707 : 0 : recoveryStopXid = recordXid;
2708 : 0 : recoveryStopTime = recordXtime;
2709 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2710 : 0 : recoveryStopName[0] = '\0';
2711 : :
2712 [ # # ]: 0 : if (isCommit)
2713 : : {
2714 [ # # ]: 0 : ereport(LOG,
2715 : : (errmsg("recovery stopping before commit of transaction %u, time %s",
2716 : : recoveryStopXid,
2717 : : timestamptz_to_str(recoveryStopTime))));
2718 : : }
2719 : : else
2720 : : {
2721 [ # # ]: 0 : ereport(LOG,
2722 : : (errmsg("recovery stopping before abort of transaction %u, time %s",
2723 : : recoveryStopXid,
2724 : : timestamptz_to_str(recoveryStopTime))));
2725 : : }
2726 : : }
2727 : :
1298 heikki.linnakangas@i 2728 :CBC 21257 : return stopsHere;
2729 : : }
2730 : :
2731 : : /*
2732 : : * Same as recoveryStopsBefore, but called after applying the record.
2733 : : *
2734 : : * We also track the timestamp of the latest applied COMMIT/ABORT
2735 : : * record in XLogRecoveryCtl->recoveryLastXTime.
2736 : : */
2737 : : static bool
2738 : 2735749 : recoveryStopsAfter(XLogReaderState *record)
2739 : : {
2740 : : uint8 info;
2741 : : uint8 xact_info;
2742 : : uint8 rmid;
823 2743 : 2735749 : TimestampTz recordXtime = 0;
2744 : :
2745 : : /*
2746 : : * Ignore recovery target settings when not in archive recovery (meaning
2747 : : * we are in crash recovery).
2748 : : */
1298 2749 [ + + ]: 2735749 : if (!ArchiveRecoveryRequested)
2750 : 243315 : return false;
2751 : :
2752 : 2492434 : info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2753 : 2492434 : rmid = XLogRecGetRmid(record);
2754 : :
2755 : : /*
2756 : : * There can be many restore points that share the same name; we stop at
2757 : : * the first one.
2758 : : */
2759 [ + + + + ]: 2492434 : if (recoveryTarget == RECOVERY_TARGET_NAME &&
2760 [ + + ]: 20 : rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2761 : : {
2762 : : xl_restore_point *recordRestorePointData;
2763 : :
2764 : 3 : recordRestorePointData = (xl_restore_point *) XLogRecGetData(record);
2765 : :
2766 [ + + ]: 3 : if (strcmp(recordRestorePointData->rp_name, recoveryTargetName) == 0)
2767 : : {
2768 : 2 : recoveryStopAfter = true;
2769 : 2 : recoveryStopXid = InvalidTransactionId;
2770 : 2 : recoveryStopLSN = InvalidXLogRecPtr;
2771 : 2 : (void) getRecordTimestamp(record, &recoveryStopTime);
2772 : 2 : strlcpy(recoveryStopName, recordRestorePointData->rp_name, MAXFNAMELEN);
2773 : :
2774 [ + - ]: 2 : ereport(LOG,
2775 : : (errmsg("recovery stopping at restore point \"%s\", time %s",
2776 : : recoveryStopName,
2777 : : timestamptz_to_str(recoveryStopTime))));
2778 : 2 : return true;
2779 : : }
2780 : : }
2781 : :
2782 : : /* Check if the target LSN has been reached */
2783 [ + + + + ]: 2492432 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2784 : 8053 : recoveryTargetInclusive &&
2785 [ + + ]: 8053 : record->ReadRecPtr >= recoveryTargetLSN)
2786 : : {
2787 : 3 : recoveryStopAfter = true;
2788 : 3 : recoveryStopXid = InvalidTransactionId;
2789 : 3 : recoveryStopLSN = record->ReadRecPtr;
2790 : 3 : recoveryStopTime = 0;
2791 : 3 : recoveryStopName[0] = '\0';
2792 [ + - ]: 3 : ereport(LOG,
2793 : : errmsg("recovery stopping after WAL location (LSN) \"%X/%08X\"",
2794 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2795 : 3 : return true;
2796 : : }
2797 : :
2798 [ + + ]: 2492429 : if (rmid != RM_XACT_ID)
2799 : 2471040 : return false;
2800 : :
2801 : 21389 : xact_info = info & XLOG_XACT_OPMASK;
2802 : :
2803 [ + + + + ]: 21389 : if (xact_info == XLOG_XACT_COMMIT ||
2804 [ + + ]: 1914 : xact_info == XLOG_XACT_COMMIT_PREPARED ||
2805 [ + + ]: 145 : xact_info == XLOG_XACT_ABORT ||
2806 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2807 : : {
2808 : : TransactionId recordXid;
2809 : :
2810 : : /* Update the last applied transaction timestamp */
2811 [ + - ]: 21255 : if (getRecordTimestamp(record, &recordXtime))
2812 : 21255 : SetLatestXTime(recordXtime);
2813 : :
2814 : : /* Extract the XID of the committed/aborted transaction */
2815 [ + + ]: 21255 : if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2816 : : {
2817 : 24 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2818 : : xl_xact_parsed_commit parsed;
2819 : :
2820 : 24 : ParseCommitRecord(XLogRecGetInfo(record),
2821 : : xlrec,
2822 : : &parsed);
2823 : 24 : recordXid = parsed.twophase_xid;
2824 : : }
2825 [ + + ]: 21231 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2826 : : {
2827 : 11 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2828 : : xl_xact_parsed_abort parsed;
2829 : :
2830 : 11 : ParseAbortRecord(XLogRecGetInfo(record),
2831 : : xlrec,
2832 : : &parsed);
2833 : 11 : recordXid = parsed.twophase_xid;
2834 : : }
2835 : : else
2836 : 21220 : recordXid = XLogRecGetXid(record);
2837 : :
2838 : : /*
2839 : : * There can be only one transaction end record with this exact
2840 : : * transactionid
2841 : : *
2842 : : * when testing for an xid, we MUST test for equality only, since
2843 : : * transactions are numbered in the order they start, not the order
2844 : : * they complete. A higher numbered xid will complete before you about
2845 : : * 50% of the time...
2846 : : */
2847 [ - + - - ]: 21255 : if (recoveryTarget == RECOVERY_TARGET_XID && recoveryTargetInclusive &&
1298 heikki.linnakangas@i 2848 [ # # ]:UBC 0 : recordXid == recoveryTargetXid)
2849 : : {
2850 : 0 : recoveryStopAfter = true;
2851 : 0 : recoveryStopXid = recordXid;
2852 : 0 : recoveryStopTime = recordXtime;
2853 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2854 : 0 : recoveryStopName[0] = '\0';
2855 : :
2856 [ # # # # ]: 0 : if (xact_info == XLOG_XACT_COMMIT ||
2857 : : xact_info == XLOG_XACT_COMMIT_PREPARED)
2858 : : {
2859 [ # # ]: 0 : ereport(LOG,
2860 : : (errmsg("recovery stopping after commit of transaction %u, time %s",
2861 : : recoveryStopXid,
2862 : : timestamptz_to_str(recoveryStopTime))));
2863 : : }
2864 [ # # # # ]: 0 : else if (xact_info == XLOG_XACT_ABORT ||
2865 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2866 : : {
2867 [ # # ]: 0 : ereport(LOG,
2868 : : (errmsg("recovery stopping after abort of transaction %u, time %s",
2869 : : recoveryStopXid,
2870 : : timestamptz_to_str(recoveryStopTime))));
2871 : : }
2872 : 0 : return true;
2873 : : }
2874 : : }
2875 : :
2876 : : /* Check if we should stop as soon as reaching consistency */
1298 heikki.linnakangas@i 2877 [ - + - - ]:CBC 21389 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2878 : : {
1298 heikki.linnakangas@i 2879 [ # # ]:UBC 0 : ereport(LOG,
2880 : : (errmsg("recovery stopping after reaching consistency")));
2881 : :
2882 : 0 : recoveryStopAfter = true;
2883 : 0 : recoveryStopXid = InvalidTransactionId;
2884 : 0 : recoveryStopTime = 0;
2885 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2886 : 0 : recoveryStopName[0] = '\0';
2887 : 0 : return true;
2888 : : }
2889 : :
1298 heikki.linnakangas@i 2890 :CBC 21389 : return false;
2891 : : }
2892 : :
2893 : : /*
2894 : : * Create a comment for the history file to explain why and where
2895 : : * timeline changed.
2896 : : */
2897 : : static char *
2898 : 832 : getRecoveryStopReason(void)
2899 : : {
2900 : : char reason[200];
2901 : :
2902 [ - + ]: 832 : if (recoveryTarget == RECOVERY_TARGET_XID)
1298 heikki.linnakangas@i 2903 :UBC 0 : snprintf(reason, sizeof(reason),
2904 : : "%s transaction %u",
2905 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2906 : : recoveryStopXid);
1298 heikki.linnakangas@i 2907 [ - + ]:CBC 832 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
1298 heikki.linnakangas@i 2908 :UBC 0 : snprintf(reason, sizeof(reason),
2909 : : "%s %s\n",
2910 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2911 : : timestamptz_to_str(recoveryStopTime));
1298 heikki.linnakangas@i 2912 [ + + ]:CBC 832 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
2913 : 7 : snprintf(reason, sizeof(reason),
2914 : : "%s LSN %X/%08X\n",
2915 : 7 : recoveryStopAfter ? "after" : "before",
2916 [ + + ]: 7 : LSN_FORMAT_ARGS(recoveryStopLSN));
2917 [ + + ]: 825 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
2918 : 3 : snprintf(reason, sizeof(reason),
2919 : : "at restore point \"%s\"",
2920 : : recoveryStopName);
2921 [ - + ]: 822 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
1298 heikki.linnakangas@i 2922 :UBC 0 : snprintf(reason, sizeof(reason), "reached consistency");
2923 : : else
1298 heikki.linnakangas@i 2924 :CBC 822 : snprintf(reason, sizeof(reason), "no recovery target specified");
2925 : :
2926 : 832 : return pstrdup(reason);
2927 : : }
2928 : :
2929 : : /*
2930 : : * Wait until shared recoveryPauseState is set to RECOVERY_NOT_PAUSED.
2931 : : *
2932 : : * endOfRecovery is true if the recovery target is reached and
2933 : : * the paused state starts at the end of recovery because of
2934 : : * recovery_target_action=pause, and false otherwise.
2935 : : */
2936 : : static void
2937 : 3 : recoveryPausesHere(bool endOfRecovery)
2938 : : {
2939 : : /* Don't pause unless users can connect! */
2940 [ - + ]: 3 : if (!LocalHotStandbyActive)
1298 heikki.linnakangas@i 2941 :UBC 0 : return;
2942 : :
2943 : : /* Don't pause after standby promotion has been triggered */
1298 heikki.linnakangas@i 2944 [ - + ]:CBC 3 : if (LocalPromoteIsTriggered)
1298 heikki.linnakangas@i 2945 :UBC 0 : return;
2946 : :
1298 heikki.linnakangas@i 2947 [ + + ]:CBC 3 : if (endOfRecovery)
2948 [ + - ]: 1 : ereport(LOG,
2949 : : (errmsg("pausing at the end of recovery"),
2950 : : errhint("Execute pg_wal_replay_resume() to promote.")));
2951 : : else
2952 [ + - ]: 2 : ereport(LOG,
2953 : : (errmsg("recovery has paused"),
2954 : : errhint("Execute pg_wal_replay_resume() to continue.")));
2955 : :
2956 : : /* loop until recoveryPauseState is set to RECOVERY_NOT_PAUSED */
2957 [ + + ]: 9 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
2958 : : {
185 2959 : 8 : ProcessStartupProcInterrupts();
1298 2960 [ + + ]: 8 : if (CheckForStandbyTrigger())
2961 : 2 : return;
2962 : :
2963 : : /*
2964 : : * If recovery pause is requested then set it paused. While we are in
2965 : : * the loop, user might resume and pause again so set this every time.
2966 : : */
2967 : 6 : ConfirmRecoveryPaused();
2968 : :
2969 : : /*
2970 : : * We wait on a condition variable that will wake us as soon as the
2971 : : * pause ends, but we use a timeout so we can check the above exit
2972 : : * condition periodically too.
2973 : : */
2974 : 6 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
2975 : : WAIT_EVENT_RECOVERY_PAUSE);
2976 : : }
2977 : 1 : ConditionVariableCancelSleep();
2978 : : }
2979 : :
2980 : : /*
2981 : : * When recovery_min_apply_delay is set, we wait long enough to make sure
2982 : : * certain record types are applied at least that interval behind the primary.
2983 : : *
2984 : : * Returns true if we waited.
2985 : : *
2986 : : * Note that the delay is calculated between the WAL record log time and
2987 : : * the current time on standby. We would prefer to keep track of when this
2988 : : * standby received each WAL record, which would allow a more consistent
2989 : : * approach and one not affected by time synchronisation issues, but that
2990 : : * is significantly more effort and complexity for little actual gain in
2991 : : * usability.
2992 : : */
2993 : : static bool
2994 : 2735751 : recoveryApplyDelay(XLogReaderState *record)
2995 : : {
2996 : : uint8 xact_info;
2997 : : TimestampTz xtime;
2998 : : TimestampTz delayUntil;
2999 : : long msecs;
3000 : :
3001 : : /* nothing to do if no delay configured */
3002 [ + - ]: 2735751 : if (recovery_min_apply_delay <= 0)
3003 : 2735751 : return false;
3004 : :
3005 : : /* no delay is applied on a database not yet consistent */
1298 heikki.linnakangas@i 3006 [ # # ]:UBC 0 : if (!reachedConsistency)
3007 : 0 : return false;
3008 : :
3009 : : /* nothing to do if crash recovery is requested */
3010 [ # # ]: 0 : if (!ArchiveRecoveryRequested)
3011 : 0 : return false;
3012 : :
3013 : : /*
3014 : : * Is it a COMMIT record?
3015 : : *
3016 : : * We deliberately choose not to delay aborts since they have no effect on
3017 : : * MVCC. We already allow replay of records that don't have a timestamp,
3018 : : * so there is already opportunity for issues caused by early conflicts on
3019 : : * standbys.
3020 : : */
3021 [ # # ]: 0 : if (XLogRecGetRmid(record) != RM_XACT_ID)
3022 : 0 : return false;
3023 : :
3024 : 0 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
3025 : :
3026 [ # # # # ]: 0 : if (xact_info != XLOG_XACT_COMMIT &&
3027 : : xact_info != XLOG_XACT_COMMIT_PREPARED)
3028 : 0 : return false;
3029 : :
3030 [ # # ]: 0 : if (!getRecordTimestamp(record, &xtime))
3031 : 0 : return false;
3032 : :
3033 : 0 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
3034 : :
3035 : : /*
3036 : : * Exit without arming the latch if it's already past time to apply this
3037 : : * record
3038 : : */
3039 : 0 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(), delayUntil);
3040 [ # # ]: 0 : if (msecs <= 0)
3041 : 0 : return false;
3042 : :
3043 : : while (true)
3044 : : {
3045 : 0 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3046 : :
3047 : : /* This might change recovery_min_apply_delay. */
185 3048 : 0 : ProcessStartupProcInterrupts();
3049 : :
1298 3050 [ # # ]: 0 : if (CheckForStandbyTrigger())
3051 : 0 : break;
3052 : :
3053 : : /*
3054 : : * Recalculate delayUntil as recovery_min_apply_delay could have
3055 : : * changed while waiting in this loop.
3056 : : */
3057 : 0 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
3058 : :
3059 : : /*
3060 : : * Wait for difference between GetCurrentTimestamp() and delayUntil.
3061 : : */
3062 : 0 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(),
3063 : : delayUntil);
3064 : :
3065 [ # # ]: 0 : if (msecs <= 0)
3066 : 0 : break;
3067 : :
3068 [ # # ]: 0 : elog(DEBUG2, "recovery apply delay %ld milliseconds", msecs);
3069 : :
3070 : 0 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3071 : : WL_LATCH_SET | WL_TIMEOUT | WL_EXIT_ON_PM_DEATH,
3072 : : msecs,
3073 : : WAIT_EVENT_RECOVERY_APPLY_DELAY);
3074 : : }
3075 : 0 : return true;
3076 : : }
3077 : :
3078 : : /*
3079 : : * Get the current state of the recovery pause request.
3080 : : */
3081 : : RecoveryPauseState
1298 heikki.linnakangas@i 3082 :CBC 14 : GetRecoveryPauseState(void)
3083 : : {
3084 : : RecoveryPauseState state;
3085 : :
3086 [ - + ]: 14 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3087 : 14 : state = XLogRecoveryCtl->recoveryPauseState;
3088 : 14 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3089 : :
3090 : 14 : return state;
3091 : : }
3092 : :
3093 : : /*
3094 : : * Set the recovery pause state.
3095 : : *
3096 : : * If recovery pause is requested then sets the recovery pause state to
3097 : : * 'pause requested' if it is not already 'paused'. Otherwise, sets it
3098 : : * to 'not paused' to resume the recovery. The recovery pause will be
3099 : : * confirmed by the ConfirmRecoveryPaused.
3100 : : */
3101 : : void
3102 : 44 : SetRecoveryPause(bool recoveryPause)
3103 : : {
3104 [ - + ]: 44 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3105 : :
3106 [ + + ]: 44 : if (!recoveryPause)
3107 : 41 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
3108 [ + - ]: 3 : else if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_NOT_PAUSED)
3109 : 3 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSE_REQUESTED;
3110 : :
3111 : 44 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3112 : :
3113 [ + + ]: 44 : if (!recoveryPause)
3114 : 41 : ConditionVariableBroadcast(&XLogRecoveryCtl->recoveryNotPausedCV);
3115 : 44 : }
3116 : :
3117 : : /*
3118 : : * Confirm the recovery pause by setting the recovery pause state to
3119 : : * RECOVERY_PAUSED.
3120 : : */
3121 : : static void
3122 : 6 : ConfirmRecoveryPaused(void)
3123 : : {
3124 : : /* If recovery pause is requested then set it paused */
3125 [ - + ]: 6 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3126 [ + + ]: 6 : if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_PAUSE_REQUESTED)
3127 : 3 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSED;
3128 : 6 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3129 : 6 : }
3130 : :
3131 : :
3132 : : /*
3133 : : * Attempt to read the next XLOG record.
3134 : : *
3135 : : * Before first call, the reader needs to be positioned to the first record
3136 : : * by calling XLogPrefetcherBeginRead().
3137 : : *
3138 : : * If no valid record is available, returns NULL, or fails if emode is PANIC.
3139 : : * (emode must be either PANIC, LOG). In standby mode, retries until a valid
3140 : : * record is available.
3141 : : */
3142 : : static XLogRecord *
1248 tmunro@postgresql.or 3143 : 2737736 : ReadRecord(XLogPrefetcher *xlogprefetcher, int emode,
3144 : : bool fetching_ckpt, TimeLineID replayTLI)
3145 : : {
3146 : : XLogRecord *record;
3147 : 2737736 : XLogReaderState *xlogreader = XLogPrefetcherGetReader(xlogprefetcher);
1298 heikki.linnakangas@i 3148 : 2737736 : XLogPageReadPrivate *private = (XLogPageReadPrivate *) xlogreader->private_data;
3149 : :
3150 : : /* Pass through parameters to XLogPageRead */
3151 : 2737736 : private->fetching_ckpt = fetching_ckpt;
3152 : 2737736 : private->emode = emode;
3153 : 2737736 : private->randAccess = (xlogreader->ReadRecPtr == InvalidXLogRecPtr);
3154 : 2737736 : private->replayTLI = replayTLI;
3155 : :
3156 : : /* This is the first attempt to read this page. */
3157 : 2737736 : lastSourceFailed = false;
3158 : :
3159 : : for (;;)
3160 : 111 : {
3161 : : char *errormsg;
3162 : :
1248 tmunro@postgresql.or 3163 : 2737847 : record = XLogPrefetcherReadRecord(xlogprefetcher, &errormsg);
1298 heikki.linnakangas@i 3164 [ + + ]: 2737795 : if (record == NULL)
3165 : : {
3166 : : /*
3167 : : * When we find that WAL ends in an incomplete record, keep track
3168 : : * of that record. After recovery is done, we'll write a record
3169 : : * to indicate to downstream WAL readers that that portion is to
3170 : : * be ignored.
3171 : : *
3172 : : * However, when ArchiveRecoveryRequested = true, we're going to
3173 : : * switch to a new timeline at the end of recovery. We will only
3174 : : * copy WAL over to the new timeline up to the end of the last
3175 : : * complete record, so if we did this, we would later create an
3176 : : * overwrite contrecord in the wrong place, breaking everything.
3177 : : */
1104 rhaas@postgresql.org 3178 [ + + ]: 254 : if (!ArchiveRecoveryRequested &&
1298 heikki.linnakangas@i 3179 [ + + ]: 102 : !XLogRecPtrIsInvalid(xlogreader->abortedRecPtr))
3180 : : {
3181 : 11 : abortedRecPtr = xlogreader->abortedRecPtr;
3182 : 11 : missingContrecPtr = xlogreader->missingContrecPtr;
3183 : : }
3184 : :
3185 [ + + ]: 254 : if (readFile >= 0)
3186 : : {
3187 : 234 : close(readFile);
3188 : 234 : readFile = -1;
3189 : : }
3190 : :
3191 : : /*
3192 : : * We only end up here without a message when XLogPageRead()
3193 : : * failed - in that case we already logged something. In
3194 : : * StandbyMode that only happens if we have been triggered, so we
3195 : : * shouldn't loop anymore in that case.
3196 : : */
3197 [ + + ]: 254 : if (errormsg)
3198 [ + + ]: 234 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3199 : : (errmsg_internal("%s", errormsg) /* already translated */ ));
3200 : : }
3201 : :
3202 : : /*
3203 : : * Check page TLI is one of the expected values.
3204 : : */
3205 [ - + ]: 2737541 : else if (!tliInHistory(xlogreader->latestPageTLI, expectedTLEs))
3206 : : {
3207 : : char fname[MAXFNAMELEN];
3208 : : XLogSegNo segno;
3209 : : int32 offset;
3210 : :
1298 heikki.linnakangas@i 3211 :UBC 0 : XLByteToSeg(xlogreader->latestPagePtr, segno, wal_segment_size);
3212 : 0 : offset = XLogSegmentOffset(xlogreader->latestPagePtr,
3213 : : wal_segment_size);
3214 : 0 : XLogFileName(fname, xlogreader->seg.ws_tli, segno,
3215 : : wal_segment_size);
3216 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3217 : : errmsg("unexpected timeline ID %u in WAL segment %s, LSN %X/%08X, offset %u",
3218 : : xlogreader->latestPageTLI,
3219 : : fname,
3220 : : LSN_FORMAT_ARGS(xlogreader->latestPagePtr),
3221 : : offset));
3222 : 0 : record = NULL;
3223 : : }
3224 : :
1298 heikki.linnakangas@i 3225 [ + + ]:CBC 2737795 : if (record)
3226 : : {
3227 : : /* Great, got a record */
3228 : 2737684 : return record;
3229 : : }
3230 : : else
3231 : : {
3232 : : /* No valid record available from this source */
3233 : 254 : lastSourceFailed = true;
3234 : :
3235 : : /*
3236 : : * If archive recovery was requested, but we were still doing
3237 : : * crash recovery, switch to archive recovery and retry using the
3238 : : * offline archive. We have now replayed all the valid WAL in
3239 : : * pg_wal, so we are presumably now consistent.
3240 : : *
3241 : : * We require that there's at least some valid WAL present in
3242 : : * pg_wal, however (!fetching_ckpt). We could recover using the
3243 : : * WAL from the archive, even if pg_wal is completely empty, but
3244 : : * we'd have no idea how far we'd have to replay to reach
3245 : : * consistency. So err on the safe side and give up.
3246 : : */
3247 [ + + + + ]: 254 : if (!InArchiveRecovery && ArchiveRecoveryRequested &&
3248 [ + - ]: 2 : !fetching_ckpt)
3249 : : {
3250 [ - + ]: 2 : ereport(DEBUG1,
3251 : : (errmsg_internal("reached end of WAL in pg_wal, entering archive recovery")));
3252 : 2 : InArchiveRecovery = true;
3253 [ + - ]: 2 : if (StandbyModeRequested)
943 rhaas@postgresql.org 3254 : 2 : EnableStandbyMode();
3255 : :
1298 heikki.linnakangas@i 3256 : 2 : SwitchIntoArchiveRecovery(xlogreader->EndRecPtr, replayTLI);
3257 : 2 : minRecoveryPoint = xlogreader->EndRecPtr;
3258 : 2 : minRecoveryPointTLI = replayTLI;
3259 : :
3260 : 2 : CheckRecoveryConsistency();
3261 : :
3262 : : /*
3263 : : * Before we retry, reset lastSourceFailed and currentSource
3264 : : * so that we will check the archive next.
3265 : : */
3266 : 2 : lastSourceFailed = false;
3267 : 2 : currentSource = XLOG_FROM_ANY;
3268 : :
3269 : 111 : continue;
3270 : : }
3271 : :
3272 : : /* In standby mode, loop back to retry. Otherwise, give up. */
3273 [ + + + + ]: 252 : if (StandbyMode && !CheckForStandbyTrigger())
3274 : 109 : continue;
3275 : : else
3276 : 143 : return NULL;
3277 : : }
3278 : : }
3279 : : }
3280 : :
3281 : : /*
3282 : : * Read the XLOG page containing targetPagePtr into readBuf (if not read
3283 : : * already). Returns number of bytes read, if the page is read successfully,
3284 : : * or XLREAD_FAIL in case of errors. When errors occur, they are ereport'ed,
3285 : : * but only if they have not been previously reported.
3286 : : *
3287 : : * See XLogReaderRoutine.page_read for more details.
3288 : : *
3289 : : * While prefetching, xlogreader->nonblocking may be set. In that case,
3290 : : * returns XLREAD_WOULDBLOCK if we'd otherwise have to wait for more WAL.
3291 : : *
3292 : : * This is responsible for restoring files from archive as needed, as well
3293 : : * as for waiting for the requested WAL record to arrive in standby mode.
3294 : : *
3295 : : * xlogreader->private_data->emode specifies the log level used for reporting
3296 : : * "file not found" or "end of WAL" situations in archive recovery, or in
3297 : : * standby mode when promotion is triggered. If set to WARNING or below,
3298 : : * XLogPageRead() returns XLREAD_FAIL in those situations, on higher log
3299 : : * levels the ereport() won't return.
3300 : : *
3301 : : * In standby mode, if after a successful return of XLogPageRead() the
3302 : : * caller finds the record it's interested in to be broken, it should
3303 : : * ereport the error with the level determined by
3304 : : * emode_for_corrupt_record(), and then set lastSourceFailed
3305 : : * and call XLogPageRead() again with the same arguments. This lets
3306 : : * XLogPageRead() to try fetching the record from another source, or to
3307 : : * sleep and retry.
3308 : : */
3309 : : static int
3310 : 1430828 : XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr, int reqLen,
3311 : : XLogRecPtr targetRecPtr, char *readBuf)
3312 : : {
3313 : 1430828 : XLogPageReadPrivate *private =
3314 : : (XLogPageReadPrivate *) xlogreader->private_data;
3315 : 1430828 : int emode = private->emode;
3316 : : uint32 targetPageOff;
3317 : : XLogSegNo targetSegNo PG_USED_FOR_ASSERTS_ONLY;
3318 : : int r;
3319 : : instr_time io_start;
3320 : :
3321 : 1430828 : XLByteToSeg(targetPagePtr, targetSegNo, wal_segment_size);
3322 : 1430828 : targetPageOff = XLogSegmentOffset(targetPagePtr, wal_segment_size);
3323 : :
3324 : : /*
3325 : : * See if we need to switch to a new segment because the requested record
3326 : : * is not in the currently open one.
3327 : : */
3328 [ + + ]: 1430828 : if (readFile >= 0 &&
3329 [ + + ]: 1429348 : !XLByteInSeg(targetPagePtr, readSegNo, wal_segment_size))
3330 : : {
3331 : : /*
3332 : : * Request a restartpoint if we've replayed too much xlog since the
3333 : : * last one.
3334 : : */
3335 [ + + + - ]: 1347 : if (ArchiveRecoveryRequested && IsUnderPostmaster)
3336 : : {
3337 [ + + ]: 1333 : if (XLogCheckpointNeeded(readSegNo))
3338 : : {
3339 : 1238 : (void) GetRedoRecPtr();
3340 [ + + ]: 1238 : if (XLogCheckpointNeeded(readSegNo))
3341 : 1232 : RequestCheckpoint(CHECKPOINT_CAUSE_XLOG);
3342 : : }
3343 : : }
3344 : :
3345 : 1347 : close(readFile);
3346 : 1347 : readFile = -1;
3347 : 1347 : readSource = XLOG_FROM_ANY;
3348 : : }
3349 : :
3350 : 1430828 : XLByteToSeg(targetPagePtr, readSegNo, wal_segment_size);
3351 : :
3352 : 1430831 : retry:
3353 : : /* See if we need to retrieve more data */
3354 [ + + ]: 1430831 : if (readFile < 0 ||
3355 [ + + ]: 1428001 : (readSource == XLOG_FROM_STREAM &&
3356 [ + + ]: 1415642 : flushedUpto < targetPagePtr + reqLen))
3357 : : {
1248 tmunro@postgresql.or 3358 [ + + ]: 26754 : if (readFile >= 0 &&
3359 [ + + ]: 23924 : xlogreader->nonblocking &&
3360 [ + - ]: 11850 : readSource == XLOG_FROM_STREAM &&
3361 [ + - ]: 11850 : flushedUpto < targetPagePtr + reqLen)
3362 : 11850 : return XLREAD_WOULDBLOCK;
3363 : :
3364 [ + + + - ]: 14852 : switch (WaitForWALToBecomeAvailable(targetPagePtr + reqLen,
3365 : 14904 : private->randAccess,
3366 : 14904 : private->fetching_ckpt,
3367 : : targetRecPtr,
3368 : : private->replayTLI,
3369 : : xlogreader->EndRecPtr,
3370 : 14904 : xlogreader->nonblocking))
3371 : : {
3372 : 322 : case XLREAD_WOULDBLOCK:
3373 : 322 : return XLREAD_WOULDBLOCK;
3374 : 38 : case XLREAD_FAIL:
3375 [ - + ]: 38 : if (readFile >= 0)
1248 tmunro@postgresql.or 3376 :UBC 0 : close(readFile);
1248 tmunro@postgresql.or 3377 :CBC 38 : readFile = -1;
3378 : 38 : readLen = 0;
3379 : 38 : readSource = XLOG_FROM_ANY;
3380 : 38 : return XLREAD_FAIL;
3381 : 14492 : case XLREAD_SUCCESS:
3382 : 14492 : break;
3383 : : }
3384 : : }
3385 : :
3386 : : /*
3387 : : * At this point, we have the right segment open and if we're streaming we
3388 : : * know the requested record is in it.
3389 : : */
1298 heikki.linnakangas@i 3390 [ - + ]: 1418569 : Assert(readFile != -1);
3391 : :
3392 : : /*
3393 : : * If the current segment is being streamed from the primary, calculate
3394 : : * how much of the current page we have received already. We know the
3395 : : * requested record has been received, but this is for the benefit of
3396 : : * future calls, to allow quick exit at the top of this function.
3397 : : */
3398 [ + + ]: 1418569 : if (readSource == XLOG_FROM_STREAM)
3399 : : {
3400 [ + + ]: 1404726 : if (((targetPagePtr) / XLOG_BLCKSZ) != (flushedUpto / XLOG_BLCKSZ))
3401 : 1396525 : readLen = XLOG_BLCKSZ;
3402 : : else
3403 : 8201 : readLen = XLogSegmentOffset(flushedUpto, wal_segment_size) -
3404 : : targetPageOff;
3405 : : }
3406 : : else
3407 : 13843 : readLen = XLOG_BLCKSZ;
3408 : :
3409 : : /* Read the requested page */
3410 : 1418569 : readOff = targetPageOff;
3411 : :
3412 : : /* Measure I/O timing when reading segment */
192 michael@paquier.xyz 3413 : 1418569 : io_start = pgstat_prepare_io_time(track_wal_io_timing);
3414 : :
1298 heikki.linnakangas@i 3415 : 1418569 : pgstat_report_wait_start(WAIT_EVENT_WAL_READ);
1073 tmunro@postgresql.or 3416 : 1418569 : r = pg_pread(readFile, readBuf, XLOG_BLCKSZ, (off_t) readOff);
1298 heikki.linnakangas@i 3417 [ - + ]: 1418569 : if (r != XLOG_BLCKSZ)
3418 : : {
3419 : : char fname[MAXFNAMELEN];
1298 heikki.linnakangas@i 3420 :UBC 0 : int save_errno = errno;
3421 : :
3422 : 0 : pgstat_report_wait_end();
3423 : :
214 michael@paquier.xyz 3424 : 0 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3425 : : io_start, 1, r);
3426 : :
1298 heikki.linnakangas@i 3427 : 0 : XLogFileName(fname, curFileTLI, readSegNo, wal_segment_size);
3428 [ # # ]: 0 : if (r < 0)
3429 : : {
3430 : 0 : errno = save_errno;
3431 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3432 : : (errcode_for_file_access(),
3433 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: %m",
3434 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3435 : : readOff)));
3436 : : }
3437 : : else
3438 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3439 : : (errcode(ERRCODE_DATA_CORRUPTED),
3440 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: read %d of %zu",
3441 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3442 : : readOff, r, (Size) XLOG_BLCKSZ)));
3443 : 0 : goto next_record_is_invalid;
3444 : : }
1298 heikki.linnakangas@i 3445 :CBC 1418569 : pgstat_report_wait_end();
3446 : :
214 michael@paquier.xyz 3447 : 1418569 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3448 : : io_start, 1, r);
3449 : :
1298 heikki.linnakangas@i 3450 [ - + ]: 1418569 : Assert(targetSegNo == readSegNo);
3451 [ - + ]: 1418569 : Assert(targetPageOff == readOff);
3452 [ - + ]: 1418569 : Assert(reqLen <= readLen);
3453 : :
3454 : 1418569 : xlogreader->seg.ws_tli = curFileTLI;
3455 : :
3456 : : /*
3457 : : * Check the page header immediately, so that we can retry immediately if
3458 : : * it's not valid. This may seem unnecessary, because ReadPageInternal()
3459 : : * validates the page header anyway, and would propagate the failure up to
3460 : : * ReadRecord(), which would retry. However, there's a corner case with
3461 : : * continuation records, if a record is split across two pages such that
3462 : : * we would need to read the two pages from different sources across two
3463 : : * WAL segments.
3464 : : *
3465 : : * The first page is only available locally, in pg_wal, because it's
3466 : : * already been recycled on the primary. The second page, however, is not
3467 : : * present in pg_wal, and we should stream it from the primary. There is a
3468 : : * recycled WAL segment present in pg_wal, with garbage contents, however.
3469 : : * We would read the first page from the local WAL segment, but when
3470 : : * reading the second page, we would read the bogus, recycled, WAL
3471 : : * segment. If we didn't catch that case here, we would never recover,
3472 : : * because ReadRecord() would retry reading the whole record from the
3473 : : * beginning.
3474 : : *
3475 : : * Of course, this only catches errors in the page header, which is what
3476 : : * happens in the case of a recycled WAL segment. Other kinds of errors or
3477 : : * corruption still has the same problem. But this at least fixes the
3478 : : * common case, which can happen as part of normal operation.
3479 : : *
3480 : : * Validating the page header is cheap enough that doing it twice
3481 : : * shouldn't be a big deal from a performance point of view.
3482 : : *
3483 : : * When not in standby mode, an invalid page header should cause recovery
3484 : : * to end, not retry reading the page, so we don't need to validate the
3485 : : * page header here for the retry. Instead, ReadPageInternal() is
3486 : : * responsible for the validation.
3487 : : */
3488 [ + + ]: 1418569 : if (StandbyMode &&
229 michael@paquier.xyz 3489 [ + + ]: 1407776 : (targetPagePtr % wal_segment_size) == 0 &&
1298 heikki.linnakangas@i 3490 [ + + ]: 1302 : !XLogReaderValidatePageHeader(xlogreader, targetPagePtr, readBuf))
3491 : : {
3492 : : /*
3493 : : * Emit this error right now then retry this page immediately. Use
3494 : : * errmsg_internal() because the message was already translated.
3495 : : */
3496 [ + - ]: 4 : if (xlogreader->errormsg_buf[0])
3497 [ + + ]: 4 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3498 : : (errmsg_internal("%s", xlogreader->errormsg_buf)));
3499 : :
3500 : : /* reset any error XLogReaderValidatePageHeader() might have set */
1099 tmunro@postgresql.or 3501 : 4 : XLogReaderResetError(xlogreader);
1298 heikki.linnakangas@i 3502 : 4 : goto next_record_is_invalid;
3503 : : }
3504 : :
3505 : 1418565 : return readLen;
3506 : :
3507 : 4 : next_record_is_invalid:
3508 : :
3509 : : /*
3510 : : * If we're reading ahead, give up fast. Retries and error reporting will
3511 : : * be handled by a later read when recovery catches up to this point.
3512 : : */
1099 tmunro@postgresql.or 3513 [ + + ]: 4 : if (xlogreader->nonblocking)
3514 : 1 : return XLREAD_WOULDBLOCK;
3515 : :
1298 heikki.linnakangas@i 3516 : 3 : lastSourceFailed = true;
3517 : :
3518 [ + - ]: 3 : if (readFile >= 0)
3519 : 3 : close(readFile);
3520 : 3 : readFile = -1;
3521 : 3 : readLen = 0;
3522 : 3 : readSource = XLOG_FROM_ANY;
3523 : :
3524 : : /* In standby-mode, keep trying */
3525 [ + - ]: 3 : if (StandbyMode)
3526 : 3 : goto retry;
3527 : : else
1248 tmunro@postgresql.or 3528 :UBC 0 : return XLREAD_FAIL;
3529 : : }
3530 : :
3531 : : /*
3532 : : * Open the WAL segment containing WAL location 'RecPtr'.
3533 : : *
3534 : : * The segment can be fetched via restore_command, or via walreceiver having
3535 : : * streamed the record, or it can already be present in pg_wal. Checking
3536 : : * pg_wal is mainly for crash recovery, but it will be polled in standby mode
3537 : : * too, in case someone copies a new segment directly to pg_wal. That is not
3538 : : * documented or recommended, though.
3539 : : *
3540 : : * If 'fetching_ckpt' is true, we're fetching a checkpoint record, and should
3541 : : * prepare to read WAL starting from RedoStartLSN after this.
3542 : : *
3543 : : * 'RecPtr' might not point to the beginning of the record we're interested
3544 : : * in, it might also point to the page or segment header. In that case,
3545 : : * 'tliRecPtr' is the position of the WAL record we're interested in. It is
3546 : : * used to decide which timeline to stream the requested WAL from.
3547 : : *
3548 : : * 'replayLSN' is the current replay LSN, so that if we scan for new
3549 : : * timelines, we can reject a switch to a timeline that branched off before
3550 : : * this point.
3551 : : *
3552 : : * If the record is not immediately available, the function returns false
3553 : : * if we're not in standby mode. In standby mode, waits for it to become
3554 : : * available.
3555 : : *
3556 : : * When the requested record becomes available, the function opens the file
3557 : : * containing it (if not open already), and returns XLREAD_SUCCESS. When end
3558 : : * of standby mode is triggered by the user, and there is no more WAL
3559 : : * available, returns XLREAD_FAIL.
3560 : : *
3561 : : * If nonblocking is true, then give up immediately if we can't satisfy the
3562 : : * request, returning XLREAD_WOULDBLOCK instead of waiting.
3563 : : */
3564 : : static XLogPageReadResult
1298 heikki.linnakangas@i 3565 :CBC 14904 : WaitForWALToBecomeAvailable(XLogRecPtr RecPtr, bool randAccess,
3566 : : bool fetching_ckpt, XLogRecPtr tliRecPtr,
3567 : : TimeLineID replayTLI, XLogRecPtr replayLSN,
3568 : : bool nonblocking)
3569 : : {
3570 : : static TimestampTz last_fail_time = 0;
3571 : : TimestampTz now;
3572 : 14904 : bool streaming_reply_sent = false;
3573 : :
3574 : : /*-------
3575 : : * Standby mode is implemented by a state machine:
3576 : : *
3577 : : * 1. Read from either archive or pg_wal (XLOG_FROM_ARCHIVE), or just
3578 : : * pg_wal (XLOG_FROM_PG_WAL)
3579 : : * 2. Check for promotion trigger request
3580 : : * 3. Read from primary server via walreceiver (XLOG_FROM_STREAM)
3581 : : * 4. Rescan timelines
3582 : : * 5. Sleep wal_retrieve_retry_interval milliseconds, and loop back to 1.
3583 : : *
3584 : : * Failure to read from the current source advances the state machine to
3585 : : * the next state.
3586 : : *
3587 : : * 'currentSource' indicates the current state. There are no currentSource
3588 : : * values for "check trigger", "rescan timelines", and "sleep" states,
3589 : : * those actions are taken when reading from the previous source fails, as
3590 : : * part of advancing to the next state.
3591 : : *
3592 : : * If standby mode is turned off while reading WAL from stream, we move
3593 : : * to XLOG_FROM_ARCHIVE and reset lastSourceFailed, to force fetching
3594 : : * the files (which would be required at end of recovery, e.g., timeline
3595 : : * history file) from archive or pg_wal. We don't need to kill WAL receiver
3596 : : * here because it's already stopped when standby mode is turned off at
3597 : : * the end of recovery.
3598 : : *-------
3599 : : */
3600 [ + + ]: 14904 : if (!InArchiveRecovery)
3601 : 891 : currentSource = XLOG_FROM_PG_WAL;
3602 [ + + ]: 14013 : else if (currentSource == XLOG_FROM_ANY ||
3603 [ + + - + ]: 13905 : (!StandbyMode && currentSource == XLOG_FROM_STREAM))
3604 : : {
3605 : 108 : lastSourceFailed = false;
3606 : 108 : currentSource = XLOG_FROM_ARCHIVE;
3607 : : }
3608 : :
3609 : : for (;;)
3610 : 12254 : {
3611 : 27158 : XLogSource oldSource = currentSource;
3612 : 27158 : bool startWalReceiver = false;
3613 : :
3614 : : /*
3615 : : * First check if we failed to read from the current source, and
3616 : : * advance the state machine if so. The failure to read might've
3617 : : * happened outside this function, e.g when a CRC check fails on a
3618 : : * record, or within this loop.
3619 : : */
3620 [ + + ]: 27158 : if (lastSourceFailed)
3621 : : {
3622 : : /*
3623 : : * Don't allow any retry loops to occur during nonblocking
3624 : : * readahead. Let the caller process everything that has been
3625 : : * decoded already first.
3626 : : */
1248 tmunro@postgresql.or 3627 [ + + ]: 432 : if (nonblocking)
3628 : 67 : return XLREAD_WOULDBLOCK;
3629 : :
1298 heikki.linnakangas@i 3630 [ + + - ]: 365 : switch (currentSource)
3631 : : {
3632 : 221 : case XLOG_FROM_ARCHIVE:
3633 : : case XLOG_FROM_PG_WAL:
3634 : :
3635 : : /*
3636 : : * Check to see if promotion is requested. Note that we do
3637 : : * this only after failure, so when you promote, we still
3638 : : * finish replaying as much as we can from archive and
3639 : : * pg_wal before failover.
3640 : : */
3641 [ + + + + ]: 221 : if (StandbyMode && CheckForStandbyTrigger())
3642 : : {
3643 : 18 : XLogShutdownWalRcv();
1248 tmunro@postgresql.or 3644 : 18 : return XLREAD_FAIL;
3645 : : }
3646 : :
3647 : : /*
3648 : : * Not in standby mode, and we've now tried the archive
3649 : : * and pg_wal.
3650 : : */
1298 heikki.linnakangas@i 3651 [ + + ]: 203 : if (!StandbyMode)
1248 tmunro@postgresql.or 3652 : 20 : return XLREAD_FAIL;
3653 : :
3654 : : /*
3655 : : * Move to XLOG_FROM_STREAM state, and set to start a
3656 : : * walreceiver if necessary.
3657 : : */
1298 heikki.linnakangas@i 3658 : 183 : currentSource = XLOG_FROM_STREAM;
3659 : 183 : startWalReceiver = true;
3660 : 183 : break;
3661 : :
3662 : 144 : case XLOG_FROM_STREAM:
3663 : :
3664 : : /*
3665 : : * Failure while streaming. Most likely, we got here
3666 : : * because streaming replication was terminated, or
3667 : : * promotion was triggered. But we also get here if we
3668 : : * find an invalid record in the WAL streamed from the
3669 : : * primary, in which case something is seriously wrong.
3670 : : * There's little chance that the problem will just go
3671 : : * away, but PANIC is not good for availability either,
3672 : : * especially in hot standby mode. So, we treat that the
3673 : : * same as disconnection, and retry from archive/pg_wal
3674 : : * again. The WAL in the archive should be identical to
3675 : : * what was streamed, so it's unlikely that it helps, but
3676 : : * one can hope...
3677 : : */
3678 : :
3679 : : /*
3680 : : * We should be able to move to XLOG_FROM_STREAM only in
3681 : : * standby mode.
3682 : : */
3683 [ - + ]: 144 : Assert(StandbyMode);
3684 : :
3685 : : /*
3686 : : * Before we leave XLOG_FROM_STREAM state, make sure that
3687 : : * walreceiver is not active, so that it won't overwrite
3688 : : * WAL that we restore from archive.
3689 : : */
1087 noah@leadboat.com 3690 : 144 : XLogShutdownWalRcv();
3691 : :
3692 : : /*
3693 : : * Before we sleep, re-scan for possible new timelines if
3694 : : * we were requested to recover to the latest timeline.
3695 : : */
1298 heikki.linnakangas@i 3696 [ + - ]: 144 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
3697 : : {
3698 [ + + ]: 144 : if (rescanLatestTimeLine(replayTLI, replayLSN))
3699 : : {
3700 : 6 : currentSource = XLOG_FROM_ARCHIVE;
3701 : 6 : break;
3702 : : }
3703 : : }
3704 : :
3705 : : /*
3706 : : * XLOG_FROM_STREAM is the last state in our state
3707 : : * machine, so we've exhausted all the options for
3708 : : * obtaining the requested WAL. We're going to loop back
3709 : : * and retry from the archive, but if it hasn't been long
3710 : : * since last attempt, sleep wal_retrieve_retry_interval
3711 : : * milliseconds to avoid busy-waiting.
3712 : : */
3713 : 138 : now = GetCurrentTimestamp();
3714 [ + + ]: 138 : if (!TimestampDifferenceExceeds(last_fail_time, now,
3715 : : wal_retrieve_retry_interval))
3716 : : {
3717 : : long wait_time;
3718 : :
3719 : 144 : wait_time = wal_retrieve_retry_interval -
3720 : 72 : TimestampDifferenceMilliseconds(last_fail_time, now);
3721 : :
61 alvherre@kurilemu.de 3722 [ + - ]:GNC 72 : elog(LOG, "waiting for WAL to become available at %X/%08X",
3723 : : LSN_FORMAT_ARGS(RecPtr));
3724 : :
3725 : : /* Do background tasks that might benefit us later. */
1012 tgl@sss.pgh.pa.us 3726 :CBC 72 : KnownAssignedTransactionIdsIdleMaintenance();
3727 : :
1298 heikki.linnakangas@i 3728 : 72 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3729 : : WL_LATCH_SET | WL_TIMEOUT |
3730 : : WL_EXIT_ON_PM_DEATH,
3731 : : wait_time,
3732 : : WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL);
3733 : 72 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3734 : 72 : now = GetCurrentTimestamp();
3735 : :
3736 : : /* Handle interrupt signals of startup process */
185 3737 : 72 : ProcessStartupProcInterrupts();
3738 : : }
1298 3739 : 123 : last_fail_time = now;
3740 : 123 : currentSource = XLOG_FROM_ARCHIVE;
3741 : 123 : break;
3742 : :
1298 heikki.linnakangas@i 3743 :UBC 0 : default:
3744 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
3745 : : }
3746 : : }
1298 heikki.linnakangas@i 3747 [ + + ]:CBC 26726 : else if (currentSource == XLOG_FROM_PG_WAL)
3748 : : {
3749 : : /*
3750 : : * We just successfully read a file in pg_wal. We prefer files in
3751 : : * the archive over ones in pg_wal, so try the next file again
3752 : : * from the archive first.
3753 : : */
3754 [ - + ]: 889 : if (InArchiveRecovery)
1298 heikki.linnakangas@i 3755 :UBC 0 : currentSource = XLOG_FROM_ARCHIVE;
3756 : : }
3757 : :
1298 heikki.linnakangas@i 3758 [ + + ]:CBC 27038 : if (currentSource != oldSource)
3759 [ + + + - ]: 312 : elog(DEBUG2, "switched WAL source from %s to %s after %s",
3760 : : xlogSourceNames[oldSource], xlogSourceNames[currentSource],
3761 : : lastSourceFailed ? "failure" : "success");
3762 : :
3763 : : /*
3764 : : * We've now handled possible failure. Try to read from the chosen
3765 : : * source.
3766 : : */
3767 : 27038 : lastSourceFailed = false;
3768 : :
3769 [ + + - ]: 27038 : switch (currentSource)
3770 : : {
3771 : 1642 : case XLOG_FROM_ARCHIVE:
3772 : : case XLOG_FROM_PG_WAL:
3773 : :
3774 : : /*
3775 : : * WAL receiver must not be running when reading WAL from
3776 : : * archive or pg_wal.
3777 : : */
3778 [ - + ]: 1642 : Assert(!WalRcvStreaming());
3779 : :
3780 : : /* Close any old file we might have open. */
3781 [ + + ]: 1642 : if (readFile >= 0)
3782 : : {
3783 : 69 : close(readFile);
3784 : 69 : readFile = -1;
3785 : : }
3786 : : /* Reset curFileTLI if random fetch. */
3787 [ + + ]: 1642 : if (randAccess)
3788 : 1032 : curFileTLI = 0;
3789 : :
3790 : : /*
3791 : : * Try to restore the file from archive, or read an existing
3792 : : * file from pg_wal.
3793 : : */
361 michael@paquier.xyz 3794 : 1642 : readFile = XLogFileReadAnyTLI(readSegNo,
1298 heikki.linnakangas@i 3795 [ + + ]: 1642 : currentSource == XLOG_FROM_ARCHIVE ? XLOG_FROM_ANY :
3796 : : currentSource);
3797 [ + + ]: 1642 : if (readFile >= 0)
1248 tmunro@postgresql.or 3798 : 1484 : return XLREAD_SUCCESS; /* success! */
3799 : :
3800 : : /*
3801 : : * Nope, not found in archive or pg_wal.
3802 : : */
1298 heikki.linnakangas@i 3803 : 158 : lastSourceFailed = true;
3804 : 158 : break;
3805 : :
3806 : 25396 : case XLOG_FROM_STREAM:
3807 : : {
3808 : : bool havedata;
3809 : :
3810 : : /*
3811 : : * We should be able to move to XLOG_FROM_STREAM only in
3812 : : * standby mode.
3813 : : */
3814 [ - + ]: 25396 : Assert(StandbyMode);
3815 : :
3816 : : /*
3817 : : * First, shutdown walreceiver if its restart has been
3818 : : * requested -- but no point if we're already slated for
3819 : : * starting it.
3820 : : */
3821 [ + + + - ]: 25396 : if (pendingWalRcvRestart && !startWalReceiver)
3822 : : {
3823 : 4 : XLogShutdownWalRcv();
3824 : :
3825 : : /*
3826 : : * Re-scan for possible new timelines if we were
3827 : : * requested to recover to the latest timeline.
3828 : : */
3829 [ + - ]: 4 : if (recoveryTargetTimeLineGoal ==
3830 : : RECOVERY_TARGET_TIMELINE_LATEST)
3831 : 4 : rescanLatestTimeLine(replayTLI, replayLSN);
3832 : :
3833 : 4 : startWalReceiver = true;
3834 : : }
3835 : 25396 : pendingWalRcvRestart = false;
3836 : :
3837 : : /*
3838 : : * Launch walreceiver if needed.
3839 : : *
3840 : : * If fetching_ckpt is true, RecPtr points to the initial
3841 : : * checkpoint location. In that case, we use RedoStartLSN
3842 : : * as the streaming start position instead of RecPtr, so
3843 : : * that when we later jump backwards to start redo at
3844 : : * RedoStartLSN, we will have the logs streamed already.
3845 : : */
3846 [ + + + - ]: 25396 : if (startWalReceiver &&
3847 [ + + ]: 187 : PrimaryConnInfo && strcmp(PrimaryConnInfo, "") != 0)
3848 : : {
3849 : : XLogRecPtr ptr;
3850 : : TimeLineID tli;
3851 : :
3852 [ - + ]: 160 : if (fetching_ckpt)
3853 : : {
1298 heikki.linnakangas@i 3854 :UBC 0 : ptr = RedoStartLSN;
3855 : 0 : tli = RedoStartTLI;
3856 : : }
3857 : : else
3858 : : {
1298 heikki.linnakangas@i 3859 :CBC 160 : ptr = RecPtr;
3860 : :
3861 : : /*
3862 : : * Use the record begin position to determine the
3863 : : * TLI, rather than the position we're reading.
3864 : : */
3865 : 160 : tli = tliOfPointInHistory(tliRecPtr, expectedTLEs);
3866 : :
3867 [ + - - + ]: 160 : if (curFileTLI > 0 && tli < curFileTLI)
61 alvherre@kurilemu.de 3868 [ # # ]:UNC 0 : elog(ERROR, "according to history file, WAL location %X/%08X belongs to timeline %u, but previous recovered WAL file came from timeline %u",
3869 : : LSN_FORMAT_ARGS(tliRecPtr),
3870 : : tli, curFileTLI);
3871 : : }
1298 heikki.linnakangas@i 3872 :CBC 160 : curFileTLI = tli;
3873 : 160 : SetInstallXLogFileSegmentActive();
3874 : 160 : RequestXLogStreaming(tli, ptr, PrimaryConnInfo,
3875 : : PrimarySlotName,
3876 : : wal_receiver_create_temp_slot);
3877 : 160 : flushedUpto = 0;
3878 : : }
3879 : :
3880 : : /*
3881 : : * Check if WAL receiver is active or wait to start up.
3882 : : */
3883 [ + + ]: 25396 : if (!WalRcvStreaming())
3884 : : {
3885 : 119 : lastSourceFailed = true;
3886 : 119 : break;
3887 : : }
3888 : :
3889 : : /*
3890 : : * Walreceiver is active, so see if new data has arrived.
3891 : : *
3892 : : * We only advance XLogReceiptTime when we obtain fresh
3893 : : * WAL from walreceiver and observe that we had already
3894 : : * processed everything before the most recent "chunk"
3895 : : * that it flushed to disk. In steady state where we are
3896 : : * keeping up with the incoming data, XLogReceiptTime will
3897 : : * be updated on each cycle. When we are behind,
3898 : : * XLogReceiptTime will not advance, so the grace time
3899 : : * allotted to conflicting queries will decrease.
3900 : : */
3901 [ + + ]: 25277 : if (RecPtr < flushedUpto)
3902 : 1617 : havedata = true;
3903 : : else
3904 : : {
3905 : : XLogRecPtr latestChunkStart;
3906 : :
3907 : 23660 : flushedUpto = GetWalRcvFlushRecPtr(&latestChunkStart, &receiveTLI);
3908 [ + + + - ]: 23660 : if (RecPtr < flushedUpto && receiveTLI == curFileTLI)
3909 : : {
3910 : 12421 : havedata = true;
3911 [ + + ]: 12421 : if (latestChunkStart <= RecPtr)
3912 : : {
3913 : 7870 : XLogReceiptTime = GetCurrentTimestamp();
3914 : 7870 : SetCurrentChunkStartTime(XLogReceiptTime);
3915 : : }
3916 : : }
3917 : : else
3918 : 11239 : havedata = false;
3919 : : }
3920 [ + + ]: 25277 : if (havedata)
3921 : : {
3922 : : /*
3923 : : * Great, streamed far enough. Open the file if it's
3924 : : * not open already. Also read the timeline history
3925 : : * file if we haven't initialized timeline history
3926 : : * yet; it should be streamed over and present in
3927 : : * pg_wal by now. Use XLOG_FROM_STREAM so that source
3928 : : * info is set correctly and XLogReceiptTime isn't
3929 : : * changed.
3930 : : *
3931 : : * NB: We must set readTimeLineHistory based on
3932 : : * recoveryTargetTLI, not receiveTLI. Normally they'll
3933 : : * be the same, but if recovery_target_timeline is
3934 : : * 'latest' and archiving is configured, then it's
3935 : : * possible that we managed to retrieve one or more
3936 : : * new timeline history files from the archive,
3937 : : * updating recoveryTargetTLI.
3938 : : */
3939 [ + + ]: 14038 : if (readFile < 0)
3940 : : {
3941 [ - + ]: 1030 : if (!expectedTLEs)
1298 heikki.linnakangas@i 3942 :UBC 0 : expectedTLEs = readTimeLineHistory(recoveryTargetTLI);
361 michael@paquier.xyz 3943 :CBC 1030 : readFile = XLogFileRead(readSegNo, receiveTLI,
3944 : : XLOG_FROM_STREAM, false);
1298 heikki.linnakangas@i 3945 [ - + ]: 1030 : Assert(readFile >= 0);
3946 : : }
3947 : : else
3948 : : {
3949 : : /* just make sure source info is correct... */
3950 : 13008 : readSource = XLOG_FROM_STREAM;
3951 : 13008 : XLogReceiptSource = XLOG_FROM_STREAM;
1248 tmunro@postgresql.or 3952 : 13008 : return XLREAD_SUCCESS;
3953 : : }
1298 heikki.linnakangas@i 3954 : 1030 : break;
3955 : : }
3956 : :
3957 : : /* In nonblocking mode, return rather than sleeping. */
1248 tmunro@postgresql.or 3958 [ + + ]: 11239 : if (nonblocking)
3959 : 255 : return XLREAD_WOULDBLOCK;
3960 : :
3961 : : /*
3962 : : * Data not here yet. Check for trigger, then wait for
3963 : : * walreceiver to wake us up when new WAL arrives.
3964 : : */
1298 heikki.linnakangas@i 3965 [ + + ]: 10984 : if (CheckForStandbyTrigger())
3966 : : {
3967 : : /*
3968 : : * Note that we don't return XLREAD_FAIL immediately
3969 : : * here. After being triggered, we still want to
3970 : : * replay all the WAL that was already streamed. It's
3971 : : * in pg_wal now, so we just treat this as a failure,
3972 : : * and the state machine will move on to replay the
3973 : : * streamed WAL from pg_wal, and then recheck the
3974 : : * trigger and exit replay.
3975 : : */
3976 : 25 : lastSourceFailed = true;
3977 : 25 : break;
3978 : : }
3979 : :
3980 : : /*
3981 : : * Since we have replayed everything we have received so
3982 : : * far and are about to start waiting for more WAL, let's
3983 : : * tell the upstream server our replay location now so
3984 : : * that pg_stat_replication doesn't show stale
3985 : : * information.
3986 : : */
3987 [ + + ]: 10959 : if (!streaming_reply_sent)
3988 : : {
3989 : 9481 : WalRcvForceReply();
3990 : 9481 : streaming_reply_sent = true;
3991 : : }
3992 : :
3993 : : /* Do any background tasks that might benefit us later. */
1012 tgl@sss.pgh.pa.us 3994 : 10959 : KnownAssignedTransactionIdsIdleMaintenance();
3995 : :
3996 : : /* Update pg_stat_recovery_prefetch before sleeping. */
1248 tmunro@postgresql.or 3997 : 10959 : XLogPrefetcherComputeStats(xlogprefetcher);
3998 : :
3999 : : /*
4000 : : * Wait for more WAL to arrive, when we will be woken
4001 : : * immediately by the WAL receiver.
4002 : : */
1298 heikki.linnakangas@i 4003 : 10959 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
4004 : : WL_LATCH_SET | WL_EXIT_ON_PM_DEATH,
4005 : : -1L,
4006 : : WAIT_EVENT_RECOVERY_WAL_STREAM);
4007 : 10959 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
4008 : 10959 : break;
4009 : : }
4010 : :
1298 heikki.linnakangas@i 4011 :UBC 0 : default:
4012 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
4013 : : }
4014 : :
4015 : : /*
4016 : : * Check for recovery pause here so that we can confirm more quickly
4017 : : * that a requested pause has actually taken effect.
4018 : : */
1298 heikki.linnakangas@i 4019 [ + + ]:CBC 12291 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
4020 : : RECOVERY_NOT_PAUSED)
4021 : 2 : recoveryPausesHere(false);
4022 : :
4023 : : /*
4024 : : * This possibly-long loop needs to handle interrupts of startup
4025 : : * process.
4026 : : */
185 4027 : 12291 : ProcessStartupProcInterrupts();
4028 : : }
4029 : :
4030 : : return XLREAD_FAIL; /* not reached */
4031 : : }
4032 : :
4033 : :
4034 : : /*
4035 : : * Determine what log level should be used to report a corrupt WAL record
4036 : : * in the current WAL page, previously read by XLogPageRead().
4037 : : *
4038 : : * 'emode' is the error mode that would be used to report a file-not-found
4039 : : * or legitimate end-of-WAL situation. Generally, we use it as-is, but if
4040 : : * we're retrying the exact same record that we've tried previously, only
4041 : : * complain the first time to keep the noise down. However, we only do when
4042 : : * reading from pg_wal, because we don't expect any invalid records in archive
4043 : : * or in records streamed from the primary. Files in the archive should be complete,
4044 : : * and we should never hit the end of WAL because we stop and wait for more WAL
4045 : : * to arrive before replaying it.
4046 : : *
4047 : : * NOTE: This function remembers the RecPtr value it was last called with,
4048 : : * to suppress repeated messages about the same record. Only call this when
4049 : : * you are about to ereport(), or you might cause a later message to be
4050 : : * erroneously suppressed.
4051 : : */
4052 : : static int
1298 4053 : 238 : emode_for_corrupt_record(int emode, XLogRecPtr RecPtr)
4054 : : {
4055 : : static XLogRecPtr lastComplaint = 0;
4056 : :
4057 [ + + + - ]: 238 : if (readSource == XLOG_FROM_PG_WAL && emode == LOG)
4058 : : {
4059 [ + + ]: 234 : if (RecPtr == lastComplaint)
4060 : 52 : emode = DEBUG1;
4061 : : else
4062 : 182 : lastComplaint = RecPtr;
4063 : : }
4064 : 238 : return emode;
4065 : : }
4066 : :
4067 : :
4068 : : /*
4069 : : * Subroutine to try to fetch and validate a prior checkpoint record.
4070 : : */
4071 : : static XLogRecord *
1248 tmunro@postgresql.or 4072 : 887 : ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher, XLogRecPtr RecPtr,
4073 : : TimeLineID replayTLI)
4074 : : {
4075 : : XLogRecord *record;
4076 : : uint8 info;
4077 : :
1298 heikki.linnakangas@i 4078 [ - + ]: 887 : Assert(xlogreader != NULL);
4079 : :
4080 [ - + ]: 887 : if (!XRecOffIsValid(RecPtr))
4081 : : {
1144 fujii@postgresql.org 4082 [ # # ]:UBC 0 : ereport(LOG,
4083 : : (errmsg("invalid checkpoint location")));
1298 heikki.linnakangas@i 4084 : 0 : return NULL;
4085 : : }
4086 : :
1248 tmunro@postgresql.or 4087 :CBC 887 : XLogPrefetcherBeginRead(xlogprefetcher, RecPtr);
4088 : 887 : record = ReadRecord(xlogprefetcher, LOG, true, replayTLI);
4089 : :
1298 heikki.linnakangas@i 4090 [ - + ]: 887 : if (record == NULL)
4091 : : {
1144 fujii@postgresql.org 4092 [ # # ]:UBC 0 : ereport(LOG,
4093 : : (errmsg("invalid checkpoint record")));
1298 heikki.linnakangas@i 4094 : 0 : return NULL;
4095 : : }
1298 heikki.linnakangas@i 4096 [ - + ]:CBC 887 : if (record->xl_rmid != RM_XLOG_ID)
4097 : : {
1144 fujii@postgresql.org 4098 [ # # ]:UBC 0 : ereport(LOG,
4099 : : (errmsg("invalid resource manager ID in checkpoint record")));
1298 heikki.linnakangas@i 4100 : 0 : return NULL;
4101 : : }
1298 heikki.linnakangas@i 4102 :CBC 887 : info = record->xl_info & ~XLR_INFO_MASK;
4103 [ + + - + ]: 887 : if (info != XLOG_CHECKPOINT_SHUTDOWN &&
4104 : : info != XLOG_CHECKPOINT_ONLINE)
4105 : : {
1144 fujii@postgresql.org 4106 [ # # ]:UBC 0 : ereport(LOG,
4107 : : (errmsg("invalid xl_info in checkpoint record")));
1298 heikki.linnakangas@i 4108 : 0 : return NULL;
4109 : : }
1298 heikki.linnakangas@i 4110 [ - + ]:CBC 887 : if (record->xl_tot_len != SizeOfXLogRecord + SizeOfXLogRecordDataHeaderShort + sizeof(CheckPoint))
4111 : : {
1144 fujii@postgresql.org 4112 [ # # ]:UBC 0 : ereport(LOG,
4113 : : (errmsg("invalid length of checkpoint record")));
1298 heikki.linnakangas@i 4114 : 0 : return NULL;
4115 : : }
1298 heikki.linnakangas@i 4116 :CBC 887 : return record;
4117 : : }
4118 : :
4119 : : /*
4120 : : * Scan for new timelines that might have appeared in the archive since we
4121 : : * started recovery.
4122 : : *
4123 : : * If there are any, the function changes recovery target TLI to the latest
4124 : : * one and returns 'true'.
4125 : : */
4126 : : static bool
4127 : 148 : rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN)
4128 : : {
4129 : : List *newExpectedTLEs;
4130 : : bool found;
4131 : : ListCell *cell;
4132 : : TimeLineID newtarget;
4133 : 148 : TimeLineID oldtarget = recoveryTargetTLI;
4134 : 148 : TimeLineHistoryEntry *currentTle = NULL;
4135 : :
4136 : 148 : newtarget = findNewestTimeLine(recoveryTargetTLI);
4137 [ + + ]: 148 : if (newtarget == recoveryTargetTLI)
4138 : : {
4139 : : /* No new timelines found */
4140 : 142 : return false;
4141 : : }
4142 : :
4143 : : /*
4144 : : * Determine the list of expected TLIs for the new TLI
4145 : : */
4146 : :
4147 : 6 : newExpectedTLEs = readTimeLineHistory(newtarget);
4148 : :
4149 : : /*
4150 : : * If the current timeline is not part of the history of the new timeline,
4151 : : * we cannot proceed to it.
4152 : : */
4153 : 6 : found = false;
4154 [ + - + - : 12 : foreach(cell, newExpectedTLEs)
+ - ]
4155 : : {
4156 : 12 : currentTle = (TimeLineHistoryEntry *) lfirst(cell);
4157 : :
4158 [ + + ]: 12 : if (currentTle->tli == recoveryTargetTLI)
4159 : : {
4160 : 6 : found = true;
4161 : 6 : break;
4162 : : }
4163 : : }
4164 [ - + ]: 6 : if (!found)
4165 : : {
1298 heikki.linnakangas@i 4166 [ # # ]:UBC 0 : ereport(LOG,
4167 : : (errmsg("new timeline %u is not a child of database system timeline %u",
4168 : : newtarget,
4169 : : replayTLI)));
4170 : 0 : return false;
4171 : : }
4172 : :
4173 : : /*
4174 : : * The current timeline was found in the history file, but check that the
4175 : : * next timeline was forked off from it *after* the current recovery
4176 : : * location.
4177 : : */
1298 heikki.linnakangas@i 4178 [ - + ]:CBC 6 : if (currentTle->end < replayLSN)
4179 : : {
1298 heikki.linnakangas@i 4180 [ # # ]:UBC 0 : ereport(LOG,
4181 : : errmsg("new timeline %u forked off current database system timeline %u before current recovery point %X/%08X",
4182 : : newtarget,
4183 : : replayTLI,
4184 : : LSN_FORMAT_ARGS(replayLSN)));
4185 : 0 : return false;
4186 : : }
4187 : :
4188 : : /* The new timeline history seems valid. Switch target */
1298 heikki.linnakangas@i 4189 :CBC 6 : recoveryTargetTLI = newtarget;
4190 : 6 : list_free_deep(expectedTLEs);
4191 : 6 : expectedTLEs = newExpectedTLEs;
4192 : :
4193 : : /*
4194 : : * As in StartupXLOG(), try to ensure we have all the history files
4195 : : * between the old target and new target in pg_wal.
4196 : : */
4197 : 6 : restoreTimeLineHistoryFiles(oldtarget + 1, newtarget);
4198 : :
4199 [ + - ]: 6 : ereport(LOG,
4200 : : (errmsg("new target timeline is %u",
4201 : : recoveryTargetTLI)));
4202 : :
4203 : 6 : return true;
4204 : : }
4205 : :
4206 : :
4207 : : /*
4208 : : * Open a logfile segment for reading (during recovery).
4209 : : *
4210 : : * If source == XLOG_FROM_ARCHIVE, the segment is retrieved from archive.
4211 : : * Otherwise, it's assumed to be already available in pg_wal.
4212 : : */
4213 : : static int
361 michael@paquier.xyz 4214 : 3085 : XLogFileRead(XLogSegNo segno, TimeLineID tli,
4215 : : XLogSource source, bool notfoundOk)
4216 : : {
4217 : : char xlogfname[MAXFNAMELEN];
4218 : : char activitymsg[MAXFNAMELEN + 16];
4219 : : char path[MAXPGPATH];
4220 : : int fd;
4221 : :
1298 heikki.linnakangas@i 4222 : 3085 : XLogFileName(xlogfname, tli, segno, wal_segment_size);
4223 : :
4224 [ + + - ]: 3085 : switch (source)
4225 : : {
4226 : 762 : case XLOG_FROM_ARCHIVE:
4227 : : /* Report recovery progress in PS display */
4228 : 762 : snprintf(activitymsg, sizeof(activitymsg), "waiting for %s",
4229 : : xlogfname);
4230 : 762 : set_ps_display(activitymsg);
4231 : :
4232 [ + + ]: 762 : if (!RestoreArchivedFile(path, xlogfname,
4233 : : "RECOVERYXLOG",
4234 : : wal_segment_size,
4235 : : InRedo))
4236 : 404 : return -1;
4237 : 358 : break;
4238 : :
4239 : 2323 : case XLOG_FROM_PG_WAL:
4240 : : case XLOG_FROM_STREAM:
4241 : 2323 : XLogFilePath(path, tli, segno, wal_segment_size);
4242 : 2323 : break;
4243 : :
1298 heikki.linnakangas@i 4244 :UBC 0 : default:
4245 [ # # ]: 0 : elog(ERROR, "invalid XLogFileRead source %d", source);
4246 : : }
4247 : :
4248 : : /*
4249 : : * If the segment was fetched from archival storage, replace the existing
4250 : : * xlog segment (if any) with the archival version.
4251 : : */
1298 heikki.linnakangas@i 4252 [ + + ]:CBC 2681 : if (source == XLOG_FROM_ARCHIVE)
4253 : : {
4254 [ - + ]: 358 : Assert(!IsInstallXLogFileSegmentActive());
4255 : 358 : KeepFileRestoredFromArchive(path, xlogfname);
4256 : :
4257 : : /*
4258 : : * Set path to point at the new file in pg_wal.
4259 : : */
4260 : 358 : snprintf(path, MAXPGPATH, XLOGDIR "/%s", xlogfname);
4261 : : }
4262 : :
4263 : 2681 : fd = BasicOpenFile(path, O_RDONLY | PG_BINARY);
4264 [ + + ]: 2681 : if (fd >= 0)
4265 : : {
4266 : : /* Success! */
4267 : 2514 : curFileTLI = tli;
4268 : :
4269 : : /* Report recovery progress in PS display */
4270 : 2514 : snprintf(activitymsg, sizeof(activitymsg), "recovering %s",
4271 : : xlogfname);
4272 : 2514 : set_ps_display(activitymsg);
4273 : :
4274 : : /* Track source of data in assorted state variables */
4275 : 2514 : readSource = source;
4276 : 2514 : XLogReceiptSource = source;
4277 : : /* In FROM_STREAM case, caller tracks receipt time, not me */
4278 [ + + ]: 2514 : if (source != XLOG_FROM_STREAM)
4279 : 1484 : XLogReceiptTime = GetCurrentTimestamp();
4280 : :
4281 : 2514 : return fd;
4282 : : }
4283 [ + - - + ]: 167 : if (errno != ENOENT || !notfoundOk) /* unexpected failure? */
1298 heikki.linnakangas@i 4284 [ # # ]:UBC 0 : ereport(PANIC,
4285 : : (errcode_for_file_access(),
4286 : : errmsg("could not open file \"%s\": %m", path)));
1298 heikki.linnakangas@i 4287 :CBC 167 : return -1;
4288 : : }
4289 : :
4290 : : /*
4291 : : * Open a logfile segment for reading (during recovery).
4292 : : *
4293 : : * This version searches for the segment with any TLI listed in expectedTLEs.
4294 : : */
4295 : : static int
361 michael@paquier.xyz 4296 : 1642 : XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source)
4297 : : {
4298 : : char path[MAXPGPATH];
4299 : : ListCell *cell;
4300 : : int fd;
4301 : : List *tles;
4302 : :
4303 : : /*
4304 : : * Loop looking for a suitable timeline ID: we might need to read any of
4305 : : * the timelines listed in expectedTLEs.
4306 : : *
4307 : : * We expect curFileTLI on entry to be the TLI of the preceding file in
4308 : : * sequence, or 0 if there was no predecessor. We do not allow curFileTLI
4309 : : * to go backwards; this prevents us from picking up the wrong file when a
4310 : : * parent timeline extends to higher segment numbers than the child we
4311 : : * want to read.
4312 : : *
4313 : : * If we haven't read the timeline history file yet, read it now, so that
4314 : : * we know which TLIs to scan. We don't save the list in expectedTLEs,
4315 : : * however, unless we actually find a valid segment. That way if there is
4316 : : * neither a timeline history file nor a WAL segment in the archive, and
4317 : : * streaming replication is set up, we'll read the timeline history file
4318 : : * streamed from the primary when we start streaming, instead of
4319 : : * recovering with a dummy history generated here.
4320 : : */
1298 heikki.linnakangas@i 4321 [ + + ]: 1642 : if (expectedTLEs)
4322 : 755 : tles = expectedTLEs;
4323 : : else
4324 : 887 : tles = readTimeLineHistory(recoveryTargetTLI);
4325 : :
4326 [ + - + + : 1815 : foreach(cell, tles)
+ + ]
4327 : : {
4328 : 1661 : TimeLineHistoryEntry *hent = (TimeLineHistoryEntry *) lfirst(cell);
4329 : 1661 : TimeLineID tli = hent->tli;
4330 : :
4331 [ + + ]: 1661 : if (tli < curFileTLI)
4332 : 4 : break; /* don't bother looking at too-old TLIs */
4333 : :
4334 : : /*
4335 : : * Skip scanning the timeline ID that the logfile segment to read
4336 : : * doesn't belong to
4337 : : */
4338 [ + + ]: 1657 : if (hent->begin != InvalidXLogRecPtr)
4339 : : {
4340 : 70 : XLogSegNo beginseg = 0;
4341 : :
4342 : 70 : XLByteToSeg(hent->begin, beginseg, wal_segment_size);
4343 : :
4344 : : /*
4345 : : * The logfile segment that doesn't belong to the timeline is
4346 : : * older or newer than the segment that the timeline started or
4347 : : * ended at, respectively. It's sufficient to check only the
4348 : : * starting segment of the timeline here. Since the timelines are
4349 : : * scanned in descending order in this loop, any segments newer
4350 : : * than the ending segment should belong to newer timeline and
4351 : : * have already been read before. So it's not necessary to check
4352 : : * the ending segment of the timeline here.
4353 : : */
4354 [ + + ]: 70 : if (segno < beginseg)
4355 : 6 : continue;
4356 : : }
4357 : :
4358 [ + + - + ]: 1651 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_ARCHIVE)
4359 : : {
361 michael@paquier.xyz 4360 : 762 : fd = XLogFileRead(segno, tli, XLOG_FROM_ARCHIVE, true);
1298 heikki.linnakangas@i 4361 [ + + ]: 762 : if (fd != -1)
4362 : : {
4363 [ - + ]: 358 : elog(DEBUG1, "got WAL segment from archive");
4364 [ + + ]: 358 : if (!expectedTLEs)
4365 : 14 : expectedTLEs = tles;
4366 : 1484 : return fd;
4367 : : }
4368 : : }
4369 : :
4370 [ + + + - ]: 1293 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_PG_WAL)
4371 : : {
361 michael@paquier.xyz 4372 : 1293 : fd = XLogFileRead(segno, tli, XLOG_FROM_PG_WAL, true);
1298 heikki.linnakangas@i 4373 [ + + ]: 1293 : if (fd != -1)
4374 : : {
4375 [ + + ]: 1126 : if (!expectedTLEs)
4376 : 873 : expectedTLEs = tles;
4377 : 1126 : return fd;
4378 : : }
4379 : : }
4380 : : }
4381 : :
4382 : : /* Couldn't find it. For simplicity, complain about front timeline */
4383 : 158 : XLogFilePath(path, recoveryTargetTLI, segno, wal_segment_size);
4384 : 158 : errno = ENOENT;
361 michael@paquier.xyz 4385 [ + + ]: 158 : ereport(DEBUG2,
4386 : : (errcode_for_file_access(),
4387 : : errmsg("could not open file \"%s\": %m", path)));
1298 heikki.linnakangas@i 4388 : 158 : return -1;
4389 : : }
4390 : :
4391 : : /*
4392 : : * Set flag to signal the walreceiver to restart. (The startup process calls
4393 : : * this on noticing a relevant configuration change.)
4394 : : */
4395 : : void
4396 : 5 : StartupRequestWalReceiverRestart(void)
4397 : : {
4398 [ + - + + ]: 5 : if (currentSource == XLOG_FROM_STREAM && WalRcvRunning())
4399 : : {
4400 [ + - ]: 4 : ereport(LOG,
4401 : : (errmsg("WAL receiver process shutdown requested")));
4402 : :
4403 : 4 : pendingWalRcvRestart = true;
4404 : : }
4405 : 5 : }
4406 : :
4407 : :
4408 : : /*
4409 : : * Has a standby promotion already been triggered?
4410 : : *
4411 : : * Unlike CheckForStandbyTrigger(), this works in any process
4412 : : * that's connected to shared memory.
4413 : : */
4414 : : bool
4415 : 50 : PromoteIsTriggered(void)
4416 : : {
4417 : : /*
4418 : : * We check shared state each time only until a standby promotion is
4419 : : * triggered. We can't trigger a promotion again, so there's no need to
4420 : : * keep checking after the shared variable has once been seen true.
4421 : : */
4422 [ + + ]: 50 : if (LocalPromoteIsTriggered)
4423 : 40 : return true;
4424 : :
4425 [ - + ]: 10 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4426 : 10 : LocalPromoteIsTriggered = XLogRecoveryCtl->SharedPromoteIsTriggered;
4427 : 10 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4428 : :
4429 : 10 : return LocalPromoteIsTriggered;
4430 : : }
4431 : :
4432 : : static void
4433 : 40 : SetPromoteIsTriggered(void)
4434 : : {
4435 [ - + ]: 40 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4436 : 40 : XLogRecoveryCtl->SharedPromoteIsTriggered = true;
4437 : 40 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4438 : :
4439 : : /*
4440 : : * Mark the recovery pause state as 'not paused' because the paused state
4441 : : * ends and promotion continues if a promotion is triggered while recovery
4442 : : * is paused. Otherwise pg_get_wal_replay_pause_state() can mistakenly
4443 : : * return 'paused' while a promotion is ongoing.
4444 : : */
4445 : 40 : SetRecoveryPause(false);
4446 : :
4447 : 40 : LocalPromoteIsTriggered = true;
4448 : 40 : }
4449 : :
4450 : : /*
4451 : : * Check whether a promote request has arrived.
4452 : : */
4453 : : static bool
4454 : 11341 : CheckForStandbyTrigger(void)
4455 : : {
4456 [ + + ]: 11341 : if (LocalPromoteIsTriggered)
4457 : 44 : return true;
4458 : :
4459 [ + + + - ]: 11297 : if (IsPromoteSignaled() && CheckPromoteSignal())
4460 : : {
4461 [ + - ]: 40 : ereport(LOG, (errmsg("received promote request")));
4462 : 40 : RemovePromoteSignalFiles();
4463 : 40 : ResetPromoteSignaled();
4464 : 40 : SetPromoteIsTriggered();
4465 : 40 : return true;
4466 : : }
4467 : :
4468 : 11257 : return false;
4469 : : }
4470 : :
4471 : : /*
4472 : : * Remove the files signaling a standby promotion request.
4473 : : */
4474 : : void
4475 : 846 : RemovePromoteSignalFiles(void)
4476 : : {
4477 : 846 : unlink(PROMOTE_SIGNAL_FILE);
4478 : 846 : }
4479 : :
4480 : : /*
4481 : : * Check to see if a promote request has arrived.
4482 : : */
4483 : : bool
4484 : 627 : CheckPromoteSignal(void)
4485 : : {
4486 : : struct stat stat_buf;
4487 : :
4488 [ + + ]: 627 : if (stat(PROMOTE_SIGNAL_FILE, &stat_buf) == 0)
4489 : 80 : return true;
4490 : :
4491 : 547 : return false;
4492 : : }
4493 : :
4494 : : /*
4495 : : * Wake up startup process to replay newly arrived WAL, or to notice that
4496 : : * failover has been requested.
4497 : : */
4498 : : void
4499 : 63848 : WakeupRecovery(void)
4500 : : {
4501 : 63848 : SetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
4502 : 63848 : }
4503 : :
4504 : : /*
4505 : : * Schedule a walreceiver wakeup in the main recovery loop.
4506 : : */
4507 : : void
4508 : 2 : XLogRequestWalReceiverReply(void)
4509 : : {
4510 : 2 : doRequestWalReceiverReply = true;
4511 : 2 : }
4512 : :
4513 : : /*
4514 : : * Is HotStandby active yet? This is only important in special backends
4515 : : * since normal backends won't ever be able to connect until this returns
4516 : : * true. Postmaster knows this by way of signal, not via shared memory.
4517 : : *
4518 : : * Unlike testing standbyState, this works in any process that's connected to
4519 : : * shared memory. (And note that standbyState alone doesn't tell the truth
4520 : : * anyway.)
4521 : : */
4522 : : bool
4523 : 145 : HotStandbyActive(void)
4524 : : {
4525 : : /*
4526 : : * We check shared state each time only until Hot Standby is active. We
4527 : : * can't de-activate Hot Standby, so there's no need to keep checking
4528 : : * after the shared variable has once been seen true.
4529 : : */
4530 [ + + ]: 145 : if (LocalHotStandbyActive)
4531 : 15 : return true;
4532 : : else
4533 : : {
4534 : : /* spinlock is essential on machines with weak memory ordering! */
4535 [ - + ]: 130 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4536 : 130 : LocalHotStandbyActive = XLogRecoveryCtl->SharedHotStandbyActive;
4537 : 130 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4538 : :
4539 : 130 : return LocalHotStandbyActive;
4540 : : }
4541 : : }
4542 : :
4543 : : /*
4544 : : * Like HotStandbyActive(), but to be used only in WAL replay code,
4545 : : * where we don't need to ask any other process what the state is.
4546 : : */
4547 : : static bool
1298 heikki.linnakangas@i 4548 :UBC 0 : HotStandbyActiveInReplay(void)
4549 : : {
4550 [ # # # # ]: 0 : Assert(AmStartupProcess() || !IsPostmasterEnvironment);
4551 : 0 : return LocalHotStandbyActive;
4552 : : }
4553 : :
4554 : : /*
4555 : : * Get latest redo apply position.
4556 : : *
4557 : : * Exported to allow WALReceiver to read the pointer directly.
4558 : : */
4559 : : XLogRecPtr
1298 heikki.linnakangas@i 4560 :CBC 144471 : GetXLogReplayRecPtr(TimeLineID *replayTLI)
4561 : : {
4562 : : XLogRecPtr recptr;
4563 : : TimeLineID tli;
4564 : :
4565 [ + + ]: 144471 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4566 : 144471 : recptr = XLogRecoveryCtl->lastReplayedEndRecPtr;
4567 : 144471 : tli = XLogRecoveryCtl->lastReplayedTLI;
4568 : 144471 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4569 : :
4570 [ + + ]: 144471 : if (replayTLI)
4571 : 1713 : *replayTLI = tli;
4572 : 144471 : return recptr;
4573 : : }
4574 : :
4575 : :
4576 : : /*
4577 : : * Get position of last applied, or the record being applied.
4578 : : *
4579 : : * This is different from GetXLogReplayRecPtr() in that if a WAL
4580 : : * record is currently being applied, this includes that record.
4581 : : */
4582 : : XLogRecPtr
4583 : 6015 : GetCurrentReplayRecPtr(TimeLineID *replayEndTLI)
4584 : : {
4585 : : XLogRecPtr recptr;
4586 : : TimeLineID tli;
4587 : :
4588 [ + + ]: 6015 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4589 : 6015 : recptr = XLogRecoveryCtl->replayEndRecPtr;
4590 : 6015 : tli = XLogRecoveryCtl->replayEndTLI;
4591 : 6015 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4592 : :
4593 [ + - ]: 6015 : if (replayEndTLI)
4594 : 6015 : *replayEndTLI = tli;
4595 : 6015 : return recptr;
4596 : : }
4597 : :
4598 : : /*
4599 : : * Save timestamp of latest processed commit/abort record.
4600 : : *
4601 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4602 : : * seen by processes other than the startup process. Note in particular
4603 : : * that CreateRestartPoint is executed in the checkpointer.
4604 : : */
4605 : : static void
4606 : 21255 : SetLatestXTime(TimestampTz xtime)
4607 : : {
4608 [ + + ]: 21255 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4609 : 21255 : XLogRecoveryCtl->recoveryLastXTime = xtime;
4610 : 21255 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4611 : 21255 : }
4612 : :
4613 : : /*
4614 : : * Fetch timestamp of latest processed commit/abort record.
4615 : : */
4616 : : TimestampTz
4617 : 340 : GetLatestXTime(void)
4618 : : {
4619 : : TimestampTz xtime;
4620 : :
4621 [ - + ]: 340 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4622 : 340 : xtime = XLogRecoveryCtl->recoveryLastXTime;
4623 : 340 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4624 : :
4625 : 340 : return xtime;
4626 : : }
4627 : :
4628 : : /*
4629 : : * Save timestamp of the next chunk of WAL records to apply.
4630 : : *
4631 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4632 : : * seen by all backends.
4633 : : */
4634 : : static void
4635 : 7870 : SetCurrentChunkStartTime(TimestampTz xtime)
4636 : : {
4637 [ - + ]: 7870 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4638 : 7870 : XLogRecoveryCtl->currentChunkStartTime = xtime;
4639 : 7870 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4640 : 7870 : }
4641 : :
4642 : : /*
4643 : : * Fetch timestamp of latest processed commit/abort record.
4644 : : * Startup process maintains an accurate local copy in XLogReceiptTime
4645 : : */
4646 : : TimestampTz
4647 : 282 : GetCurrentChunkReplayStartTime(void)
4648 : : {
4649 : : TimestampTz xtime;
4650 : :
4651 [ - + ]: 282 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4652 : 282 : xtime = XLogRecoveryCtl->currentChunkStartTime;
4653 : 282 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4654 : :
4655 : 282 : return xtime;
4656 : : }
4657 : :
4658 : : /*
4659 : : * Returns time of receipt of current chunk of XLOG data, as well as
4660 : : * whether it was received from streaming replication or from archives.
4661 : : */
4662 : : void
4663 : 28 : GetXLogReceiptTime(TimestampTz *rtime, bool *fromStream)
4664 : : {
4665 : : /*
4666 : : * This must be executed in the startup process, since we don't export the
4667 : : * relevant state to shared memory.
4668 : : */
4669 [ - + ]: 28 : Assert(InRecovery);
4670 : :
4671 : 28 : *rtime = XLogReceiptTime;
4672 : 28 : *fromStream = (XLogReceiptSource == XLOG_FROM_STREAM);
4673 : 28 : }
4674 : :
4675 : : /*
4676 : : * Note that text field supplied is a parameter name and does not require
4677 : : * translation
4678 : : */
4679 : : void
4680 : 575 : RecoveryRequiresIntParameter(const char *param_name, int currValue, int minValue)
4681 : : {
4682 [ - + ]: 575 : if (currValue < minValue)
4683 : : {
1298 heikki.linnakangas@i 4684 [ # # ]:UBC 0 : if (HotStandbyActiveInReplay())
4685 : : {
4686 : 0 : bool warned_for_promote = false;
4687 : :
4688 [ # # ]: 0 : ereport(WARNING,
4689 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4690 : : errmsg("hot standby is not possible because of insufficient parameter settings"),
4691 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4692 : : param_name,
4693 : : currValue,
4694 : : minValue)));
4695 : :
4696 : 0 : SetRecoveryPause(true);
4697 : :
4698 [ # # ]: 0 : ereport(LOG,
4699 : : (errmsg("recovery has paused"),
4700 : : errdetail("If recovery is unpaused, the server will shut down."),
4701 : : errhint("You can then restart the server after making the necessary configuration changes.")));
4702 : :
4703 [ # # ]: 0 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
4704 : : {
185 4705 : 0 : ProcessStartupProcInterrupts();
4706 : :
1298 4707 [ # # ]: 0 : if (CheckForStandbyTrigger())
4708 : : {
4709 [ # # ]: 0 : if (!warned_for_promote)
4710 [ # # ]: 0 : ereport(WARNING,
4711 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4712 : : errmsg("promotion is not possible because of insufficient parameter settings"),
4713 : :
4714 : : /*
4715 : : * Repeat the detail from above so it's easy to find
4716 : : * in the log.
4717 : : */
4718 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4719 : : param_name,
4720 : : currValue,
4721 : : minValue),
4722 : : errhint("Restart the server after making the necessary configuration changes.")));
4723 : 0 : warned_for_promote = true;
4724 : : }
4725 : :
4726 : : /*
4727 : : * If recovery pause is requested then set it paused. While
4728 : : * we are in the loop, user might resume and pause again so
4729 : : * set this every time.
4730 : : */
4731 : 0 : ConfirmRecoveryPaused();
4732 : :
4733 : : /*
4734 : : * We wait on a condition variable that will wake us as soon
4735 : : * as the pause ends, but we use a timeout so we can check the
4736 : : * above conditions periodically too.
4737 : : */
4738 : 0 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
4739 : : WAIT_EVENT_RECOVERY_PAUSE);
4740 : : }
4741 : 0 : ConditionVariableCancelSleep();
4742 : : }
4743 : :
4744 [ # # ]: 0 : ereport(FATAL,
4745 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4746 : : errmsg("recovery aborted because of insufficient parameter settings"),
4747 : : /* Repeat the detail from above so it's easy to find in the log. */
4748 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4749 : : param_name,
4750 : : currValue,
4751 : : minValue),
4752 : : errhint("You can restart the server after making the necessary configuration changes.")));
4753 : : }
1298 heikki.linnakangas@i 4754 :CBC 575 : }
4755 : :
4756 : :
4757 : : /*
4758 : : * GUC check_hook for primary_slot_name
4759 : : */
4760 : : bool
1089 tgl@sss.pgh.pa.us 4761 : 1198 : check_primary_slot_name(char **newval, void **extra, GucSource source)
4762 : : {
4763 [ + - + + ]: 1198 : if (*newval && strcmp(*newval, "") != 0 &&
45 akapila@postgresql.o 4764 [ - + ]:GNC 130 : !ReplicationSlotValidateName(*newval, false, WARNING))
1089 tgl@sss.pgh.pa.us 4765 :UBC 0 : return false;
4766 : :
1089 tgl@sss.pgh.pa.us 4767 :CBC 1198 : return true;
4768 : : }
4769 : :
4770 : : /*
4771 : : * Recovery target settings: Only one of the several recovery_target* settings
4772 : : * may be set. Setting a second one results in an error. The global variable
4773 : : * recoveryTarget tracks which kind of recovery target was chosen. Other
4774 : : * variables store the actual target value (for example a string or a xid).
4775 : : * The assign functions of the parameters check whether a competing parameter
4776 : : * was already set. But we want to allow setting the same parameter multiple
4777 : : * times. We also want to allow unsetting a parameter and setting a different
4778 : : * one, so we unset recoveryTarget when the parameter is set to an empty
4779 : : * string.
4780 : : *
4781 : : * XXX this code is broken by design. Throwing an error from a GUC assign
4782 : : * hook breaks fundamental assumptions of guc.c. So long as all the variables
4783 : : * for which this can happen are PGC_POSTMASTER, the consequences are limited,
4784 : : * since we'd just abort postmaster startup anyway. Nonetheless it's likely
4785 : : * that we have odd behaviors such as unexpected GUC ordering dependencies.
4786 : : */
4787 : :
4788 : : pg_noreturn static void
4789 : 1 : error_multiple_recovery_targets(void)
4790 : : {
4791 [ + - ]: 1 : ereport(ERROR,
4792 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4793 : : errmsg("multiple recovery targets specified"),
4794 : : errdetail("At most one of \"recovery_target\", \"recovery_target_lsn\", \"recovery_target_name\", \"recovery_target_time\", \"recovery_target_xid\" may be set.")));
4795 : : }
4796 : :
4797 : : /*
4798 : : * GUC check_hook for recovery_target
4799 : : */
4800 : : bool
4801 : 1070 : check_recovery_target(char **newval, void **extra, GucSource source)
4802 : : {
4803 [ + + - + ]: 1070 : if (strcmp(*newval, "immediate") != 0 && strcmp(*newval, "") != 0)
4804 : : {
1089 tgl@sss.pgh.pa.us 4805 :UBC 0 : GUC_check_errdetail("The only allowed value is \"immediate\".");
4806 : 0 : return false;
4807 : : }
1089 tgl@sss.pgh.pa.us 4808 :CBC 1070 : return true;
4809 : : }
4810 : :
4811 : : /*
4812 : : * GUC assign_hook for recovery_target
4813 : : */
4814 : : void
4815 : 1070 : assign_recovery_target(const char *newval, void *extra)
4816 : : {
4817 [ - + ]: 1070 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1089 tgl@sss.pgh.pa.us 4818 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_IMMEDIATE)
4819 : 0 : error_multiple_recovery_targets();
4820 : :
1089 tgl@sss.pgh.pa.us 4821 [ + - + + ]:CBC 1070 : if (newval && strcmp(newval, "") != 0)
4822 : 1 : recoveryTarget = RECOVERY_TARGET_IMMEDIATE;
4823 : : else
4824 : 1069 : recoveryTarget = RECOVERY_TARGET_UNSET;
4825 : 1070 : }
4826 : :
4827 : : /*
4828 : : * GUC check_hook for recovery_target_lsn
4829 : : */
4830 : : bool
4831 : 1076 : check_recovery_target_lsn(char **newval, void **extra, GucSource source)
4832 : : {
4833 [ + + ]: 1076 : if (strcmp(*newval, "") != 0)
4834 : : {
4835 : : XLogRecPtr lsn;
4836 : : XLogRecPtr *myextra;
1 michael@paquier.xyz 4837 :GNC 9 : ErrorSaveContext escontext = {T_ErrorSaveContext};
4838 : :
4839 : 9 : lsn = pg_lsn_in_safe(*newval, (Node *) &escontext);
4840 [ - + ]: 9 : if (escontext.error_occurred)
1089 tgl@sss.pgh.pa.us 4841 :UBC 0 : return false;
4842 : :
163 dgustafsson@postgres 4843 :CBC 9 : myextra = (XLogRecPtr *) guc_malloc(LOG, sizeof(XLogRecPtr));
4844 [ - + ]: 9 : if (!myextra)
163 dgustafsson@postgres 4845 :UBC 0 : return false;
1089 tgl@sss.pgh.pa.us 4846 :CBC 9 : *myextra = lsn;
282 peter@eisentraut.org 4847 : 9 : *extra = myextra;
4848 : : }
1089 tgl@sss.pgh.pa.us 4849 : 1076 : return true;
4850 : : }
4851 : :
4852 : : /*
4853 : : * GUC assign_hook for recovery_target_lsn
4854 : : */
4855 : : void
4856 : 1076 : assign_recovery_target_lsn(const char *newval, void *extra)
4857 : : {
4858 [ - + ]: 1076 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1089 tgl@sss.pgh.pa.us 4859 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_LSN)
4860 : 0 : error_multiple_recovery_targets();
4861 : :
1089 tgl@sss.pgh.pa.us 4862 [ + - + + ]:CBC 1076 : if (newval && strcmp(newval, "") != 0)
4863 : : {
4864 : 9 : recoveryTarget = RECOVERY_TARGET_LSN;
4865 : 9 : recoveryTargetLSN = *((XLogRecPtr *) extra);
4866 : : }
4867 : : else
4868 : 1067 : recoveryTarget = RECOVERY_TARGET_UNSET;
4869 : 1076 : }
4870 : :
4871 : : /*
4872 : : * GUC check_hook for recovery_target_name
4873 : : */
4874 : : bool
4875 : 1076 : check_recovery_target_name(char **newval, void **extra, GucSource source)
4876 : : {
4877 : : /* Use the value of newval directly */
4878 [ - + ]: 1076 : if (strlen(*newval) >= MAXFNAMELEN)
4879 : : {
477 peter@eisentraut.org 4880 :UBC 0 : GUC_check_errdetail("\"%s\" is too long (maximum %d characters).",
4881 : : "recovery_target_name", MAXFNAMELEN - 1);
1089 tgl@sss.pgh.pa.us 4882 : 0 : return false;
4883 : : }
1089 tgl@sss.pgh.pa.us 4884 :CBC 1076 : return true;
4885 : : }
4886 : :
4887 : : /*
4888 : : * GUC assign_hook for recovery_target_name
4889 : : */
4890 : : void
4891 : 1076 : assign_recovery_target_name(const char *newval, void *extra)
4892 : : {
4893 [ - + ]: 1076 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1089 tgl@sss.pgh.pa.us 4894 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_NAME)
4895 : 0 : error_multiple_recovery_targets();
4896 : :
1089 tgl@sss.pgh.pa.us 4897 [ + - + + ]:CBC 1076 : if (newval && strcmp(newval, "") != 0)
4898 : : {
4899 : 6 : recoveryTarget = RECOVERY_TARGET_NAME;
4900 : 6 : recoveryTargetName = newval;
4901 : : }
4902 : : else
4903 : 1070 : recoveryTarget = RECOVERY_TARGET_UNSET;
4904 : 1076 : }
4905 : :
4906 : : /*
4907 : : * GUC check_hook for recovery_target_time
4908 : : *
4909 : : * The interpretation of the recovery_target_time string can depend on the
4910 : : * time zone setting, so we need to wait until after all GUC processing is
4911 : : * done before we can do the final parsing of the string. This check function
4912 : : * only does a parsing pass to catch syntax errors, but we store the string
4913 : : * and parse it again when we need to use it.
4914 : : */
4915 : : bool
4916 : 1072 : check_recovery_target_time(char **newval, void **extra, GucSource source)
4917 : : {
4918 [ + + ]: 1072 : if (strcmp(*newval, "") != 0)
4919 : : {
4920 : : /* reject some special values */
4921 [ + - ]: 3 : if (strcmp(*newval, "now") == 0 ||
4922 [ + - ]: 3 : strcmp(*newval, "today") == 0 ||
4923 [ + - ]: 3 : strcmp(*newval, "tomorrow") == 0 ||
4924 [ - + ]: 3 : strcmp(*newval, "yesterday") == 0)
4925 : : {
1089 tgl@sss.pgh.pa.us 4926 :UBC 0 : return false;
4927 : : }
4928 : :
4929 : : /*
4930 : : * parse timestamp value (see also timestamptz_in())
4931 : : */
4932 : : {
1089 tgl@sss.pgh.pa.us 4933 :CBC 3 : char *str = *newval;
4934 : : fsec_t fsec;
4935 : : struct pg_tm tt,
4936 : 3 : *tm = &tt;
4937 : : int tz;
4938 : : int dtype;
4939 : : int nf;
4940 : : int dterr;
4941 : : char *field[MAXDATEFIELDS];
4942 : : int ftype[MAXDATEFIELDS];
4943 : : char workbuf[MAXDATELEN + MAXDATEFIELDS];
4944 : : DateTimeErrorExtra dtextra;
4945 : : TimestampTz timestamp;
4946 : :
4947 : 3 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
4948 : : field, ftype, MAXDATEFIELDS, &nf);
4949 [ + - ]: 3 : if (dterr == 0)
1002 4950 : 3 : dterr = DecodeDateTime(field, ftype, nf,
4951 : : &dtype, tm, &fsec, &tz, &dtextra);
1089 4952 [ - + ]: 3 : if (dterr != 0)
1089 tgl@sss.pgh.pa.us 4953 :UBC 0 : return false;
1089 tgl@sss.pgh.pa.us 4954 [ - + ]:CBC 3 : if (dtype != DTK_DATE)
1089 tgl@sss.pgh.pa.us 4955 :UBC 0 : return false;
4956 : :
1089 tgl@sss.pgh.pa.us 4957 [ - + ]:CBC 3 : if (tm2timestamp(tm, fsec, &tz, ×tamp) != 0)
4958 : : {
283 alvherre@alvh.no-ip. 4959 :UBC 0 : GUC_check_errdetail("Timestamp out of range: \"%s\".", str);
1089 tgl@sss.pgh.pa.us 4960 : 0 : return false;
4961 : : }
4962 : : }
4963 : : }
1089 tgl@sss.pgh.pa.us 4964 :CBC 1072 : return true;
4965 : : }
4966 : :
4967 : : /*
4968 : : * GUC assign_hook for recovery_target_time
4969 : : */
4970 : : void
4971 : 1072 : assign_recovery_target_time(const char *newval, void *extra)
4972 : : {
4973 [ + + ]: 1072 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
4974 [ + - ]: 1 : recoveryTarget != RECOVERY_TARGET_TIME)
4975 : 1 : error_multiple_recovery_targets();
4976 : :
4977 [ + - + + ]: 1071 : if (newval && strcmp(newval, "") != 0)
4978 : 2 : recoveryTarget = RECOVERY_TARGET_TIME;
4979 : : else
4980 : 1069 : recoveryTarget = RECOVERY_TARGET_UNSET;
4981 : 1071 : }
4982 : :
4983 : : /*
4984 : : * GUC check_hook for recovery_target_timeline
4985 : : */
4986 : : bool
4987 : 1073 : check_recovery_target_timeline(char **newval, void **extra, GucSource source)
4988 : : {
4989 : : RecoveryTargetTimeLineGoal rttg;
4990 : : RecoveryTargetTimeLineGoal *myextra;
4991 : :
4992 [ - + ]: 1073 : if (strcmp(*newval, "current") == 0)
1089 tgl@sss.pgh.pa.us 4993 :UBC 0 : rttg = RECOVERY_TARGET_TIMELINE_CONTROLFILE;
1089 tgl@sss.pgh.pa.us 4994 [ + + ]:CBC 1073 : else if (strcmp(*newval, "latest") == 0)
4995 : 1070 : rttg = RECOVERY_TARGET_TIMELINE_LATEST;
4996 : : else
4997 : : {
4998 : : char *endp;
4999 : : uint64 timeline;
5000 : :
1089 tgl@sss.pgh.pa.us 5001 :GBC 3 : rttg = RECOVERY_TARGET_TIMELINE_NUMERIC;
5002 : :
5003 : 3 : errno = 0;
65 michael@paquier.xyz 5004 :GNC 3 : timeline = strtou64(*newval, &endp, 0);
5005 : :
5006 [ + + + - : 3 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
5007 : : {
5008 : 1 : GUC_check_errdetail("\"%s\" is not a valid number.",
5009 : : "recovery_target_timeline");
5010 : 3 : return false;
5011 : : }
5012 : :
5013 [ + + + - ]: 2 : if (timeline < 1 || timeline > PG_UINT32_MAX)
5014 : : {
5015 : 2 : GUC_check_errdetail("\"%s\" must be between %u and %u.",
5016 : : "recovery_target_timeline", 1, UINT_MAX);
1089 tgl@sss.pgh.pa.us 5017 :GBC 2 : return false;
5018 : : }
5019 : : }
5020 : :
163 dgustafsson@postgres 5021 :CBC 1070 : myextra = (RecoveryTargetTimeLineGoal *) guc_malloc(LOG, sizeof(RecoveryTargetTimeLineGoal));
5022 [ - + ]: 1070 : if (!myextra)
163 dgustafsson@postgres 5023 :UBC 0 : return false;
1089 tgl@sss.pgh.pa.us 5024 :CBC 1070 : *myextra = rttg;
282 peter@eisentraut.org 5025 : 1070 : *extra = myextra;
5026 : :
1089 tgl@sss.pgh.pa.us 5027 : 1070 : return true;
5028 : : }
5029 : :
5030 : : /*
5031 : : * GUC assign_hook for recovery_target_timeline
5032 : : */
5033 : : void
5034 : 1070 : assign_recovery_target_timeline(const char *newval, void *extra)
5035 : : {
5036 : 1070 : recoveryTargetTimeLineGoal = *((RecoveryTargetTimeLineGoal *) extra);
5037 [ - + ]: 1070 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1089 tgl@sss.pgh.pa.us 5038 :UBC 0 : recoveryTargetTLIRequested = (TimeLineID) strtoul(newval, NULL, 0);
5039 : : else
1089 tgl@sss.pgh.pa.us 5040 :CBC 1070 : recoveryTargetTLIRequested = 0;
5041 : 1070 : }
5042 : :
5043 : : /*
5044 : : * GUC check_hook for recovery_target_xid
5045 : : */
5046 : : bool
5047 : 1070 : check_recovery_target_xid(char **newval, void **extra, GucSource source)
5048 : : {
5049 [ + + ]: 1070 : if (strcmp(*newval, "") != 0)
5050 : : {
5051 : : TransactionId xid;
5052 : : TransactionId *myextra;
5053 : :
5054 : 1 : errno = 0;
5055 : 1 : xid = (TransactionId) strtou64(*newval, NULL, 0);
5056 [ + - - + ]: 1 : if (errno == EINVAL || errno == ERANGE)
1089 tgl@sss.pgh.pa.us 5057 :UBC 0 : return false;
5058 : :
163 dgustafsson@postgres 5059 :CBC 1 : myextra = (TransactionId *) guc_malloc(LOG, sizeof(TransactionId));
5060 [ - + ]: 1 : if (!myextra)
163 dgustafsson@postgres 5061 :UBC 0 : return false;
1089 tgl@sss.pgh.pa.us 5062 :CBC 1 : *myextra = xid;
282 peter@eisentraut.org 5063 : 1 : *extra = myextra;
5064 : : }
1089 tgl@sss.pgh.pa.us 5065 : 1070 : return true;
5066 : : }
5067 : :
5068 : : /*
5069 : : * GUC assign_hook for recovery_target_xid
5070 : : */
5071 : : void
5072 : 1070 : assign_recovery_target_xid(const char *newval, void *extra)
5073 : : {
5074 [ - + ]: 1070 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1089 tgl@sss.pgh.pa.us 5075 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_XID)
5076 : 0 : error_multiple_recovery_targets();
5077 : :
1089 tgl@sss.pgh.pa.us 5078 [ + - + + ]:CBC 1070 : if (newval && strcmp(newval, "") != 0)
5079 : : {
5080 : 1 : recoveryTarget = RECOVERY_TARGET_XID;
5081 : 1 : recoveryTargetXid = *((TransactionId *) extra);
5082 : : }
5083 : : else
5084 : 1069 : recoveryTarget = RECOVERY_TARGET_UNSET;
5085 : 1070 : }
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