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 "nodes/miscnodes.h"
49 : : #include "pgstat.h"
50 : : #include "postmaster/bgwriter.h"
51 : : #include "postmaster/startup.h"
52 : : #include "replication/slot.h"
53 : : #include "replication/slotsync.h"
54 : : #include "replication/walreceiver.h"
55 : : #include "storage/fd.h"
56 : : #include "storage/ipc.h"
57 : : #include "storage/latch.h"
58 : : #include "storage/pmsignal.h"
59 : : #include "storage/procarray.h"
60 : : #include "storage/spin.h"
61 : : #include "utils/datetime.h"
62 : : #include "utils/fmgrprotos.h"
63 : : #include "utils/guc_hooks.h"
64 : : #include "utils/pgstat_internal.h"
65 : : #include "utils/pg_lsn.h"
66 : : #include "utils/ps_status.h"
67 : : #include "utils/pg_rusage.h"
68 : :
69 : : /* Unsupported old recovery command file names (relative to $PGDATA) */
70 : : #define RECOVERY_COMMAND_FILE "recovery.conf"
71 : : #define RECOVERY_COMMAND_DONE "recovery.done"
72 : :
73 : : /*
74 : : * GUC support
75 : : */
76 : : const struct config_enum_entry recovery_target_action_options[] = {
77 : : {"pause", RECOVERY_TARGET_ACTION_PAUSE, false},
78 : : {"promote", RECOVERY_TARGET_ACTION_PROMOTE, false},
79 : : {"shutdown", RECOVERY_TARGET_ACTION_SHUTDOWN, false},
80 : : {NULL, 0, false}
81 : : };
82 : :
83 : : /* options formerly taken from recovery.conf for archive recovery */
84 : : char *recoveryRestoreCommand = NULL;
85 : : char *recoveryEndCommand = NULL;
86 : : char *archiveCleanupCommand = NULL;
87 : : RecoveryTargetType recoveryTarget = RECOVERY_TARGET_UNSET;
88 : : bool recoveryTargetInclusive = true;
89 : : int recoveryTargetAction = RECOVERY_TARGET_ACTION_PAUSE;
90 : : TransactionId recoveryTargetXid;
91 : : char *recovery_target_time_string;
92 : : TimestampTz recoveryTargetTime;
93 : : const char *recoveryTargetName;
94 : : XLogRecPtr recoveryTargetLSN;
95 : : int recovery_min_apply_delay = 0;
96 : :
97 : : /* options formerly taken from recovery.conf for XLOG streaming */
98 : : char *PrimaryConnInfo = NULL;
99 : : char *PrimarySlotName = NULL;
100 : : bool wal_receiver_create_temp_slot = false;
101 : :
102 : : /*
103 : : * recoveryTargetTimeLineGoal: what the user requested, if any
104 : : *
105 : : * recoveryTargetTLIRequested: numeric value of requested timeline, if constant
106 : : *
107 : : * recoveryTargetTLI: the currently understood target timeline; changes
108 : : *
109 : : * expectedTLEs: a list of TimeLineHistoryEntries for recoveryTargetTLI and
110 : : * the timelines of its known parents, newest first (so recoveryTargetTLI is
111 : : * always the first list member). Only these TLIs are expected to be seen in
112 : : * the WAL segments we read, and indeed only these TLIs will be considered as
113 : : * candidate WAL files to open at all.
114 : : *
115 : : * curFileTLI: the TLI appearing in the name of the current input WAL file.
116 : : * (This is not necessarily the same as the timeline from which we are
117 : : * replaying WAL, which StartupXLOG calls replayTLI, because we could be
118 : : * scanning data that was copied from an ancestor timeline when the current
119 : : * file was created.) During a sequential scan we do not allow this value
120 : : * to decrease.
121 : : */
122 : : RecoveryTargetTimeLineGoal recoveryTargetTimeLineGoal = RECOVERY_TARGET_TIMELINE_LATEST;
123 : : TimeLineID recoveryTargetTLIRequested = 0;
124 : : TimeLineID recoveryTargetTLI = 0;
125 : : static List *expectedTLEs;
126 : : static TimeLineID curFileTLI;
127 : :
128 : : /*
129 : : * When ArchiveRecoveryRequested is set, archive recovery was requested,
130 : : * ie. signal files were present. When InArchiveRecovery is set, we are
131 : : * currently recovering using offline XLOG archives. These variables are only
132 : : * valid in the startup process.
133 : : *
134 : : * When ArchiveRecoveryRequested is true, but InArchiveRecovery is false, we're
135 : : * currently performing crash recovery using only XLOG files in pg_wal, but
136 : : * will switch to using offline XLOG archives as soon as we reach the end of
137 : : * WAL in pg_wal.
138 : : */
139 : : bool ArchiveRecoveryRequested = false;
140 : : bool InArchiveRecovery = false;
141 : :
142 : : /*
143 : : * When StandbyModeRequested is set, standby mode was requested, i.e.
144 : : * standby.signal file was present. When StandbyMode is set, we are currently
145 : : * in standby mode. These variables are only valid in the startup process.
146 : : * They work similarly to ArchiveRecoveryRequested and InArchiveRecovery.
147 : : */
148 : : static bool StandbyModeRequested = false;
149 : : bool StandbyMode = false;
150 : :
151 : : /* was a signal file present at startup? */
152 : : static bool standby_signal_file_found = false;
153 : : static bool recovery_signal_file_found = false;
154 : :
155 : : /*
156 : : * CheckPointLoc is the position of the checkpoint record that determines
157 : : * where to start the replay. It comes from the backup label file or the
158 : : * control file.
159 : : *
160 : : * RedoStartLSN is the checkpoint's REDO location, also from the backup label
161 : : * file or the control file. In standby mode, XLOG streaming usually starts
162 : : * from the position where an invalid record was found. But if we fail to
163 : : * read even the initial checkpoint record, we use the REDO location instead
164 : : * of the checkpoint location as the start position of XLOG streaming.
165 : : * Otherwise we would have to jump backwards to the REDO location after
166 : : * reading the checkpoint record, because the REDO record can precede the
167 : : * checkpoint record.
168 : : */
169 : : static XLogRecPtr CheckPointLoc = InvalidXLogRecPtr;
170 : : static TimeLineID CheckPointTLI = 0;
171 : : static XLogRecPtr RedoStartLSN = InvalidXLogRecPtr;
172 : : static TimeLineID RedoStartTLI = 0;
173 : :
174 : : /*
175 : : * Local copy of SharedHotStandbyActive variable. False actually means "not
176 : : * known, need to check the shared state".
177 : : */
178 : : static bool LocalHotStandbyActive = false;
179 : :
180 : : /*
181 : : * Local copy of SharedPromoteIsTriggered variable. False actually means "not
182 : : * known, need to check the shared state".
183 : : */
184 : : static bool LocalPromoteIsTriggered = false;
185 : :
186 : : /* Has the recovery code requested a walreceiver wakeup? */
187 : : static bool doRequestWalReceiverReply;
188 : :
189 : : /* XLogReader object used to parse the WAL records */
190 : : static XLogReaderState *xlogreader = NULL;
191 : :
192 : : /* XLogPrefetcher object used to consume WAL records with read-ahead */
193 : : static XLogPrefetcher *xlogprefetcher = NULL;
194 : :
195 : : /* Parameters passed down from ReadRecord to the XLogPageRead callback. */
196 : : typedef struct XLogPageReadPrivate
197 : : {
198 : : int emode;
199 : : bool fetching_ckpt; /* are we fetching a checkpoint record? */
200 : : bool randAccess;
201 : : TimeLineID replayTLI;
202 : : } XLogPageReadPrivate;
203 : :
204 : : /* flag to tell XLogPageRead that we have started replaying */
205 : : static bool InRedo = false;
206 : :
207 : : /*
208 : : * Codes indicating where we got a WAL file from during recovery, or where
209 : : * to attempt to get one.
210 : : */
211 : : typedef enum
212 : : {
213 : : XLOG_FROM_ANY = 0, /* request to read WAL from any source */
214 : : XLOG_FROM_ARCHIVE, /* restored using restore_command */
215 : : XLOG_FROM_PG_WAL, /* existing file in pg_wal */
216 : : XLOG_FROM_STREAM, /* streamed from primary */
217 : : } XLogSource;
218 : :
219 : : /* human-readable names for XLogSources, for debugging output */
220 : : static const char *const xlogSourceNames[] = {"any", "archive", "pg_wal", "stream"};
221 : :
222 : : /*
223 : : * readFile is -1 or a kernel FD for the log file segment that's currently
224 : : * open for reading. readSegNo identifies the segment. readOff is the offset
225 : : * of the page just read, readLen indicates how much of it has been read into
226 : : * readBuf, and readSource indicates where we got the currently open file from.
227 : : *
228 : : * Note: we could use Reserve/ReleaseExternalFD to track consumption of this
229 : : * FD too (like for openLogFile in xlog.c); but it doesn't currently seem
230 : : * worthwhile, since the XLOG is not read by general-purpose sessions.
231 : : */
232 : : static int readFile = -1;
233 : : static XLogSegNo readSegNo = 0;
234 : : static uint32 readOff = 0;
235 : : static uint32 readLen = 0;
236 : : static XLogSource readSource = XLOG_FROM_ANY;
237 : :
238 : : /*
239 : : * Keeps track of which source we're currently reading from. This is
240 : : * different from readSource in that this is always set, even when we don't
241 : : * currently have a WAL file open. If lastSourceFailed is set, our last
242 : : * attempt to read from currentSource failed, and we should try another source
243 : : * next.
244 : : *
245 : : * pendingWalRcvRestart is set when a config change occurs that requires a
246 : : * walreceiver restart. This is only valid in XLOG_FROM_STREAM state.
247 : : */
248 : : static XLogSource currentSource = XLOG_FROM_ANY;
249 : : static bool lastSourceFailed = false;
250 : : static bool pendingWalRcvRestart = false;
251 : :
252 : : /*
253 : : * These variables track when we last obtained some WAL data to process,
254 : : * and where we got it from. (XLogReceiptSource is initially the same as
255 : : * readSource, but readSource gets reset to zero when we don't have data
256 : : * to process right now. It is also different from currentSource, which
257 : : * also changes when we try to read from a source and fail, while
258 : : * XLogReceiptSource tracks where we last successfully read some WAL.)
259 : : */
260 : : static TimestampTz XLogReceiptTime = 0;
261 : : static XLogSource XLogReceiptSource = XLOG_FROM_ANY;
262 : :
263 : : /* Local copy of WalRcv->flushedUpto */
264 : : static XLogRecPtr flushedUpto = 0;
265 : : static TimeLineID receiveTLI = 0;
266 : :
267 : : /*
268 : : * Copy of minRecoveryPoint and backupEndPoint from the control file.
269 : : *
270 : : * In order to reach consistency, we must replay the WAL up to
271 : : * minRecoveryPoint. If backupEndRequired is true, we must also reach
272 : : * backupEndPoint, or if it's invalid, an end-of-backup record corresponding
273 : : * to backupStartPoint.
274 : : *
275 : : * Note: In archive recovery, after consistency has been reached, the
276 : : * functions in xlog.c will start updating minRecoveryPoint in the control
277 : : * file. But this copy of minRecoveryPoint variable reflects the value at the
278 : : * beginning of recovery, and is *not* updated after consistency is reached.
279 : : */
280 : : static XLogRecPtr minRecoveryPoint;
281 : : static TimeLineID minRecoveryPointTLI;
282 : :
283 : : static XLogRecPtr backupStartPoint;
284 : : static XLogRecPtr backupEndPoint;
285 : : static bool backupEndRequired = false;
286 : :
287 : : /*
288 : : * Have we reached a consistent database state? In crash recovery, we have
289 : : * to replay all the WAL, so reachedConsistency is never set. During archive
290 : : * recovery, the database is consistent once minRecoveryPoint is reached.
291 : : *
292 : : * Consistent state means that the system is internally consistent, all
293 : : * the WAL has been replayed up to a certain point, and importantly, there
294 : : * is no trace of later actions on disk.
295 : : *
296 : : * This flag is used only by the startup process and postmaster. When
297 : : * minRecoveryPoint is reached, the startup process sets it to true and
298 : : * sends a PMSIGNAL_RECOVERY_CONSISTENT signal to the postmaster,
299 : : * which then sets it to true upon receiving the signal.
300 : : */
301 : : bool reachedConsistency = false;
302 : :
303 : : /* Buffers dedicated to consistency checks of size BLCKSZ */
304 : : static char *replay_image_masked = NULL;
305 : : static char *primary_image_masked = NULL;
306 : :
307 : :
308 : : /*
309 : : * Shared-memory state for WAL recovery.
310 : : */
311 : : typedef struct XLogRecoveryCtlData
312 : : {
313 : : /*
314 : : * SharedHotStandbyActive indicates if we allow hot standby queries to be
315 : : * run. Protected by info_lck.
316 : : */
317 : : bool SharedHotStandbyActive;
318 : :
319 : : /*
320 : : * SharedPromoteIsTriggered indicates if a standby promotion has been
321 : : * triggered. Protected by info_lck.
322 : : */
323 : : bool SharedPromoteIsTriggered;
324 : :
325 : : /*
326 : : * recoveryWakeupLatch is used to wake up the startup process to continue
327 : : * WAL replay, if it is waiting for WAL to arrive or promotion to be
328 : : * requested.
329 : : *
330 : : * Note that the startup process also uses another latch, its procLatch,
331 : : * to wait for recovery conflict. If we get rid of recoveryWakeupLatch for
332 : : * signaling the startup process in favor of using its procLatch, which
333 : : * comports better with possible generic signal handlers using that latch.
334 : : * But we should not do that because the startup process doesn't assume
335 : : * that it's waken up by walreceiver process or SIGHUP signal handler
336 : : * while it's waiting for recovery conflict. The separate latches,
337 : : * recoveryWakeupLatch and procLatch, should be used for inter-process
338 : : * communication for WAL replay and recovery conflict, respectively.
339 : : */
340 : : Latch recoveryWakeupLatch;
341 : :
342 : : /*
343 : : * Last record successfully replayed.
344 : : */
345 : : XLogRecPtr lastReplayedReadRecPtr; /* start position */
346 : : XLogRecPtr lastReplayedEndRecPtr; /* end+1 position */
347 : : TimeLineID lastReplayedTLI; /* timeline */
348 : :
349 : : /*
350 : : * When we're currently replaying a record, ie. in a redo function,
351 : : * replayEndRecPtr points to the end+1 of the record being replayed,
352 : : * otherwise it's equal to lastReplayedEndRecPtr.
353 : : */
354 : : XLogRecPtr replayEndRecPtr;
355 : : TimeLineID replayEndTLI;
356 : : /* timestamp of last COMMIT/ABORT record replayed (or being replayed) */
357 : : TimestampTz recoveryLastXTime;
358 : :
359 : : /*
360 : : * timestamp of when we started replaying the current chunk of WAL data,
361 : : * only relevant for replication or archive recovery
362 : : */
363 : : TimestampTz currentChunkStartTime;
364 : : /* Recovery pause state */
365 : : RecoveryPauseState recoveryPauseState;
366 : : ConditionVariable recoveryNotPausedCV;
367 : :
368 : : slock_t info_lck; /* locks shared variables shown above */
369 : : } XLogRecoveryCtlData;
370 : :
371 : : static XLogRecoveryCtlData *XLogRecoveryCtl = NULL;
372 : :
373 : : /*
374 : : * abortedRecPtr is the start pointer of a broken record at end of WAL when
375 : : * recovery completes; missingContrecPtr is the location of the first
376 : : * contrecord that went missing. See CreateOverwriteContrecordRecord for
377 : : * details.
378 : : */
379 : : static XLogRecPtr abortedRecPtr;
380 : : static XLogRecPtr missingContrecPtr;
381 : :
382 : : /*
383 : : * if recoveryStopsBefore/After returns true, it saves information of the stop
384 : : * point here
385 : : */
386 : : static TransactionId recoveryStopXid;
387 : : static TimestampTz recoveryStopTime;
388 : : static XLogRecPtr recoveryStopLSN;
389 : : static char recoveryStopName[MAXFNAMELEN];
390 : : static bool recoveryStopAfter;
391 : :
392 : : /* prototypes for local functions */
393 : : static void ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI);
394 : :
395 : : static void EnableStandbyMode(void);
396 : : static void readRecoverySignalFile(void);
397 : : static void validateRecoveryParameters(void);
398 : : static bool read_backup_label(XLogRecPtr *checkPointLoc,
399 : : TimeLineID *backupLabelTLI,
400 : : bool *backupEndRequired, bool *backupFromStandby);
401 : : static bool read_tablespace_map(List **tablespaces);
402 : :
403 : : static void xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI);
404 : : static void CheckRecoveryConsistency(void);
405 : : static void rm_redo_error_callback(void *arg);
406 : : #ifdef WAL_DEBUG
407 : : static void xlog_outrec(StringInfo buf, XLogReaderState *record);
408 : : #endif
409 : : static void xlog_block_info(StringInfo buf, XLogReaderState *record);
410 : : static void checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI,
411 : : TimeLineID prevTLI, TimeLineID replayTLI);
412 : : static bool getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime);
413 : : static void verifyBackupPageConsistency(XLogReaderState *record);
414 : :
415 : : static bool recoveryStopsBefore(XLogReaderState *record);
416 : : static bool recoveryStopsAfter(XLogReaderState *record);
417 : : static char *getRecoveryStopReason(void);
418 : : static void recoveryPausesHere(bool endOfRecovery);
419 : : static bool recoveryApplyDelay(XLogReaderState *record);
420 : : static void ConfirmRecoveryPaused(void);
421 : :
422 : : static XLogRecord *ReadRecord(XLogPrefetcher *xlogprefetcher,
423 : : int emode, bool fetching_ckpt,
424 : : TimeLineID replayTLI);
425 : :
426 : : static int XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr,
427 : : int reqLen, XLogRecPtr targetRecPtr, char *readBuf);
428 : : static XLogPageReadResult WaitForWALToBecomeAvailable(XLogRecPtr RecPtr,
429 : : bool randAccess,
430 : : bool fetching_ckpt,
431 : : XLogRecPtr tliRecPtr,
432 : : TimeLineID replayTLI,
433 : : XLogRecPtr replayLSN,
434 : : bool nonblocking);
435 : : static int emode_for_corrupt_record(int emode, XLogRecPtr RecPtr);
436 : : static XLogRecord *ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher,
437 : : XLogRecPtr RecPtr, TimeLineID replayTLI);
438 : : static bool rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN);
439 : : static int XLogFileRead(XLogSegNo segno, TimeLineID tli,
440 : : XLogSource source, bool notfoundOk);
441 : : static int XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source);
442 : :
443 : : static bool CheckForStandbyTrigger(void);
444 : : static void SetPromoteIsTriggered(void);
445 : : static bool HotStandbyActiveInReplay(void);
446 : :
447 : : static void SetCurrentChunkStartTime(TimestampTz xtime);
448 : : static void SetLatestXTime(TimestampTz xtime);
449 : :
450 : : /*
451 : : * Initialization of shared memory for WAL recovery
452 : : */
453 : : Size
1349 heikki.linnakangas@i 454 :CBC 2998 : XLogRecoveryShmemSize(void)
455 : : {
456 : : Size size;
457 : :
458 : : /* XLogRecoveryCtl */
459 : 2998 : size = sizeof(XLogRecoveryCtlData);
460 : :
461 : 2998 : return size;
462 : : }
463 : :
464 : : void
465 : 1049 : XLogRecoveryShmemInit(void)
466 : : {
467 : : bool found;
468 : :
469 : 1049 : XLogRecoveryCtl = (XLogRecoveryCtlData *)
470 : 1049 : ShmemInitStruct("XLOG Recovery Ctl", XLogRecoveryShmemSize(), &found);
471 [ - + ]: 1049 : if (found)
1349 heikki.linnakangas@i 472 :UBC 0 : return;
1349 heikki.linnakangas@i 473 :CBC 1049 : memset(XLogRecoveryCtl, 0, sizeof(XLogRecoveryCtlData));
474 : :
475 : 1049 : SpinLockInit(&XLogRecoveryCtl->info_lck);
476 : 1049 : InitSharedLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
477 : 1049 : ConditionVariableInit(&XLogRecoveryCtl->recoveryNotPausedCV);
478 : : }
479 : :
480 : : /*
481 : : * A thin wrapper to enable StandbyMode and do other preparatory work as
482 : : * needed.
483 : : */
484 : : static void
994 rhaas@postgresql.org 485 : 98 : EnableStandbyMode(void)
486 : : {
487 : 98 : StandbyMode = true;
488 : :
489 : : /*
490 : : * To avoid server log bloat, we don't report recovery progress in a
491 : : * standby as it will always be in recovery unless promoted. We disable
492 : : * startup progress timeout in standby mode to avoid calling
493 : : * startup_progress_timeout_handler() unnecessarily.
494 : : */
495 : 98 : disable_startup_progress_timeout();
496 : 98 : }
497 : :
498 : : /*
499 : : * Prepare the system for WAL recovery, if needed.
500 : : *
501 : : * This is called by StartupXLOG() which coordinates the server startup
502 : : * sequence. This function analyzes the control file and the backup label
503 : : * file, if any, and figures out whether we need to perform crash recovery or
504 : : * archive recovery, and how far we need to replay the WAL to reach a
505 : : * consistent state.
506 : : *
507 : : * This doesn't yet change the on-disk state, except for creating the symlinks
508 : : * from table space map file if any, and for fetching WAL files needed to find
509 : : * the checkpoint record. On entry, the caller has already read the control
510 : : * file into memory, and passes it as argument. This function updates it to
511 : : * reflect the recovery state, and the caller is expected to write it back to
512 : : * disk does after initializing other subsystems, but before calling
513 : : * PerformWalRecovery().
514 : : *
515 : : * This initializes some global variables like ArchiveRecoveryRequested, and
516 : : * StandbyModeRequested and InRecovery.
517 : : */
518 : : void
1349 heikki.linnakangas@i 519 : 907 : InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
520 : : bool *haveBackupLabel_ptr, bool *haveTblspcMap_ptr)
521 : : {
522 : : XLogPageReadPrivate *private;
523 : : struct stat st;
524 : : bool wasShutdown;
525 : : XLogRecord *record;
526 : : DBState dbstate_at_startup;
527 : 907 : bool haveTblspcMap = false;
528 : 907 : bool haveBackupLabel = false;
529 : : CheckPoint checkPoint;
530 : 907 : bool backupFromStandby = false;
531 : :
532 : 907 : dbstate_at_startup = ControlFile->state;
533 : :
534 : : /*
535 : : * Initialize on the assumption we want to recover to the latest timeline
536 : : * that's active according to pg_control.
537 : : */
538 : 907 : if (ControlFile->minRecoveryPointTLI >
539 [ + + ]: 907 : ControlFile->checkPointCopy.ThisTimeLineID)
540 : 1 : recoveryTargetTLI = ControlFile->minRecoveryPointTLI;
541 : : else
542 : 906 : recoveryTargetTLI = ControlFile->checkPointCopy.ThisTimeLineID;
543 : :
544 : : /*
545 : : * Check for signal files, and if so set up state for offline recovery
546 : : */
547 : 907 : readRecoverySignalFile();
548 : 907 : validateRecoveryParameters();
549 : :
550 : : /*
551 : : * Take ownership of the wakeup latch if we're going to sleep during
552 : : * recovery, if required.
553 : : */
554 [ + + ]: 907 : if (ArchiveRecoveryRequested)
555 : 103 : OwnLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
556 : :
557 : : /*
558 : : * Set the WAL reading processor now, as it will be needed when reading
559 : : * the checkpoint record required (backup_label or not).
560 : : */
561 : 907 : private = palloc0(sizeof(XLogPageReadPrivate));
562 : 907 : xlogreader =
563 : 907 : XLogReaderAllocate(wal_segment_size, NULL,
564 : 907 : XL_ROUTINE(.page_read = &XLogPageRead,
565 : : .segment_open = NULL,
566 : : .segment_close = wal_segment_close),
567 : : private);
568 [ - + ]: 907 : if (!xlogreader)
1349 heikki.linnakangas@i 569 [ # # ]:UBC 0 : ereport(ERROR,
570 : : (errcode(ERRCODE_OUT_OF_MEMORY),
571 : : errmsg("out of memory"),
572 : : errdetail("Failed while allocating a WAL reading processor.")));
1349 heikki.linnakangas@i 573 :CBC 907 : xlogreader->system_identifier = ControlFile->system_identifier;
574 : :
575 : : /*
576 : : * Set the WAL decode buffer size. This limits how far ahead we can read
577 : : * in the WAL.
578 : : */
1299 tmunro@postgresql.or 579 : 907 : XLogReaderSetDecodeBuffer(xlogreader, NULL, wal_decode_buffer_size);
580 : :
581 : : /* Create a WAL prefetcher. */
582 : 907 : xlogprefetcher = XLogPrefetcherAllocate(xlogreader);
583 : :
584 : : /*
585 : : * Allocate two page buffers dedicated to WAL consistency checks. We do
586 : : * it this way, rather than just making static arrays, for two reasons:
587 : : * (1) no need to waste the storage in most instantiations of the backend;
588 : : * (2) a static char array isn't guaranteed to have any particular
589 : : * alignment, whereas palloc() will provide MAXALIGN'd storage.
590 : : */
1349 heikki.linnakangas@i 591 : 907 : replay_image_masked = (char *) palloc(BLCKSZ);
592 : 907 : primary_image_masked = (char *) palloc(BLCKSZ);
593 : :
594 : : /*
595 : : * Read the backup_label file. We want to run this part of the recovery
596 : : * process after checking for signal files and after performing validation
597 : : * of the recovery parameters.
598 : : */
599 [ + + ]: 907 : if (read_backup_label(&CheckPointLoc, &CheckPointTLI, &backupEndRequired,
600 : : &backupFromStandby))
601 : : {
602 : 70 : List *tablespaces = NIL;
603 : :
604 : : /*
605 : : * Archive recovery was requested, and thanks to the backup label
606 : : * file, we know how far we need to replay to reach consistency. Enter
607 : : * archive recovery directly.
608 : : */
609 : 70 : InArchiveRecovery = true;
610 [ + + ]: 70 : if (StandbyModeRequested)
994 rhaas@postgresql.org 611 : 59 : EnableStandbyMode();
612 : :
613 : : /*
614 : : * Omitting backup_label when creating a new replica, PITR node etc.
615 : : * unfortunately is a common cause of corruption. Logging that
616 : : * backup_label was used makes it a bit easier to exclude that as the
617 : : * cause of observed corruption.
618 : : *
619 : : * Do so before we try to read the checkpoint record (which can fail),
620 : : * as otherwise it can be hard to understand why a checkpoint other
621 : : * than ControlFile->checkPoint is used.
622 : : */
641 michael@paquier.xyz 623 [ + - ]: 70 : ereport(LOG,
624 : : errmsg("starting backup recovery with redo LSN %X/%08X, checkpoint LSN %X/%08X, on timeline ID %u",
625 : : LSN_FORMAT_ARGS(RedoStartLSN),
626 : : LSN_FORMAT_ARGS(CheckPointLoc),
627 : : CheckPointTLI));
628 : :
629 : : /*
630 : : * When a backup_label file is present, we want to roll forward from
631 : : * the checkpoint it identifies, rather than using pg_control.
632 : : */
1195 fujii@postgresql.org 633 : 70 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
634 : : CheckPointTLI);
1349 heikki.linnakangas@i 635 [ + - ]: 70 : if (record != NULL)
636 : : {
637 : 70 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
638 : 70 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
639 [ + + ]: 70 : ereport(DEBUG1,
640 : : errmsg_internal("checkpoint record is at %X/%08X",
641 : : LSN_FORMAT_ARGS(CheckPointLoc)));
642 : 70 : InRecovery = true; /* force recovery even if SHUTDOWNED */
643 : :
644 : : /*
645 : : * Make sure that REDO location exists. This may not be the case
646 : : * if there was a crash during an online backup, which left a
647 : : * backup_label around that references a WAL segment that's
648 : : * already been archived.
649 : : */
650 [ + - ]: 70 : if (checkPoint.redo < CheckPointLoc)
651 : : {
1299 tmunro@postgresql.or 652 : 70 : XLogPrefetcherBeginRead(xlogprefetcher, checkPoint.redo);
653 [ - + ]: 70 : if (!ReadRecord(xlogprefetcher, LOG, false,
654 : : checkPoint.ThisTimeLineID))
1349 heikki.linnakangas@i 655 [ # # ]:UBC 0 : ereport(FATAL,
656 : : errmsg("could not find redo location %X/%08X referenced by checkpoint record at %X/%08X",
657 : : LSN_FORMAT_ARGS(checkPoint.redo), LSN_FORMAT_ARGS(CheckPointLoc)),
658 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
659 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
660 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
661 : : DataDir, DataDir, DataDir, DataDir));
662 : : }
663 : : }
664 : : else
665 : : {
666 [ # # ]: 0 : ereport(FATAL,
667 : : errmsg("could not locate required checkpoint record at %X/%08X",
668 : : LSN_FORMAT_ARGS(CheckPointLoc)),
669 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
670 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
671 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
672 : : DataDir, DataDir, DataDir, DataDir));
673 : : wasShutdown = false; /* keep compiler quiet */
674 : : }
675 : :
676 : : /* Read the tablespace_map file if present and create symlinks. */
1349 heikki.linnakangas@i 677 [ + + ]:CBC 70 : if (read_tablespace_map(&tablespaces))
678 : : {
679 : : ListCell *lc;
680 : :
681 [ + - + + : 4 : foreach(lc, tablespaces)
+ + ]
682 : : {
683 : 2 : tablespaceinfo *ti = lfirst(lc);
684 : : char *linkloc;
685 : :
419 michael@paquier.xyz 686 : 2 : linkloc = psprintf("%s/%u", PG_TBLSPC_DIR, ti->oid);
687 : :
688 : : /*
689 : : * Remove the existing symlink if any and Create the symlink
690 : : * under PGDATA.
691 : : */
1349 heikki.linnakangas@i 692 : 2 : remove_tablespace_symlink(linkloc);
693 : :
694 [ - + ]: 2 : if (symlink(ti->path, linkloc) < 0)
1349 heikki.linnakangas@i 695 [ # # ]:UBC 0 : ereport(ERROR,
696 : : (errcode_for_file_access(),
697 : : errmsg("could not create symbolic link \"%s\": %m",
698 : : linkloc)));
699 : :
1349 heikki.linnakangas@i 700 :CBC 2 : pfree(ti->path);
701 : 2 : pfree(ti);
702 : : }
703 : :
704 : : /* tell the caller to delete it later */
705 : 2 : haveTblspcMap = true;
706 : : }
707 : :
708 : : /* tell the caller to delete it later */
709 : 70 : haveBackupLabel = true;
710 : : }
711 : : else
712 : : {
713 : : /* No backup_label file has been found if we are here. */
714 : :
715 : : /*
716 : : * If tablespace_map file is present without backup_label file, there
717 : : * is no use of such file. There is no harm in retaining it, but it
718 : : * is better to get rid of the map file so that we don't have any
719 : : * redundant file in data directory and it will avoid any sort of
720 : : * confusion. It seems prudent though to just rename the file out of
721 : : * the way rather than delete it completely, also we ignore any error
722 : : * that occurs in rename operation as even if map file is present
723 : : * without backup_label file, it is harmless.
724 : : */
725 [ + + ]: 837 : if (stat(TABLESPACE_MAP, &st) == 0)
726 : : {
727 : 1 : unlink(TABLESPACE_MAP_OLD);
728 [ + - ]: 1 : if (durable_rename(TABLESPACE_MAP, TABLESPACE_MAP_OLD, DEBUG1) == 0)
729 [ + - ]: 1 : ereport(LOG,
730 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
731 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
732 : : errdetail("File \"%s\" was renamed to \"%s\".",
733 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
734 : : else
1349 heikki.linnakangas@i 735 [ # # ]:UBC 0 : ereport(LOG,
736 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
737 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
738 : : errdetail("Could not rename file \"%s\" to \"%s\": %m.",
739 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
740 : : }
741 : :
742 : : /*
743 : : * It's possible that archive recovery was requested, but we don't
744 : : * know how far we need to replay the WAL before we reach consistency.
745 : : * This can happen for example if a base backup is taken from a
746 : : * running server using an atomic filesystem snapshot, without calling
747 : : * pg_backup_start/stop. Or if you just kill a running primary server
748 : : * and put it into archive recovery by creating a recovery signal
749 : : * file.
750 : : *
751 : : * Our strategy in that case is to perform crash recovery first,
752 : : * replaying all the WAL present in pg_wal, and only enter archive
753 : : * recovery after that.
754 : : *
755 : : * But usually we already know how far we need to replay the WAL (up
756 : : * to minRecoveryPoint, up to backupEndPoint, or until we see an
757 : : * end-of-backup record), and we can enter archive recovery directly.
758 : : */
1349 heikki.linnakangas@i 759 [ + + ]:CBC 837 : if (ArchiveRecoveryRequested &&
760 [ + + ]: 39 : (ControlFile->minRecoveryPoint != InvalidXLogRecPtr ||
761 [ + - ]: 9 : ControlFile->backupEndRequired ||
762 [ + - ]: 9 : ControlFile->backupEndPoint != InvalidXLogRecPtr ||
763 [ + + ]: 9 : ControlFile->state == DB_SHUTDOWNED))
764 : : {
765 : 37 : InArchiveRecovery = true;
766 [ + - ]: 37 : if (StandbyModeRequested)
994 rhaas@postgresql.org 767 : 37 : EnableStandbyMode();
768 : : }
769 : :
770 : : /*
771 : : * For the same reason as when starting up with backup_label present,
772 : : * emit a log message when we continue initializing from a base
773 : : * backup.
774 : : */
641 michael@paquier.xyz 775 [ - + ]: 837 : if (!XLogRecPtrIsInvalid(ControlFile->backupStartPoint))
641 michael@paquier.xyz 776 [ # # ]:UBC 0 : ereport(LOG,
777 : : errmsg("restarting backup recovery with redo LSN %X/%08X",
778 : : LSN_FORMAT_ARGS(ControlFile->backupStartPoint)));
779 : :
780 : : /* Get the last valid checkpoint record. */
1349 heikki.linnakangas@i 781 :CBC 837 : CheckPointLoc = ControlFile->checkPoint;
782 : 837 : CheckPointTLI = ControlFile->checkPointCopy.ThisTimeLineID;
783 : 837 : RedoStartLSN = ControlFile->checkPointCopy.redo;
784 : 837 : RedoStartTLI = ControlFile->checkPointCopy.ThisTimeLineID;
1195 fujii@postgresql.org 785 : 837 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
786 : : CheckPointTLI);
1349 heikki.linnakangas@i 787 [ + - ]: 837 : if (record != NULL)
788 : : {
789 [ + + ]: 837 : ereport(DEBUG1,
790 : : errmsg_internal("checkpoint record is at %X/%08X",
791 : : LSN_FORMAT_ARGS(CheckPointLoc)));
792 : : }
793 : : else
794 : : {
795 : : /*
796 : : * We used to attempt to go back to a secondary checkpoint record
797 : : * here, but only when not in standby mode. We now just fail if we
798 : : * can't read the last checkpoint because this allows us to
799 : : * simplify processing around checkpoints.
800 : : */
1349 heikki.linnakangas@i 801 [ # # ]:UBC 0 : ereport(PANIC,
802 : : errmsg("could not locate a valid checkpoint record at %X/%08X",
803 : : LSN_FORMAT_ARGS(CheckPointLoc)));
804 : : }
1349 heikki.linnakangas@i 805 :CBC 837 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
806 : 837 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
807 : : }
808 : :
728 michael@paquier.xyz 809 [ + + ]: 907 : if (ArchiveRecoveryRequested)
810 : : {
811 [ + + ]: 103 : if (StandbyModeRequested)
812 [ + - ]: 98 : ereport(LOG,
813 : : (errmsg("entering standby mode")));
814 [ - + ]: 5 : else if (recoveryTarget == RECOVERY_TARGET_XID)
728 michael@paquier.xyz 815 [ # # ]:UBC 0 : ereport(LOG,
816 : : (errmsg("starting point-in-time recovery to XID %u",
817 : : recoveryTargetXid)));
728 michael@paquier.xyz 818 [ - + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
728 michael@paquier.xyz 819 [ # # ]:UBC 0 : ereport(LOG,
820 : : (errmsg("starting point-in-time recovery to %s",
821 : : timestamptz_to_str(recoveryTargetTime))));
728 michael@paquier.xyz 822 [ + + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
823 [ + - ]: 3 : ereport(LOG,
824 : : (errmsg("starting point-in-time recovery to \"%s\"",
825 : : recoveryTargetName)));
826 [ - + ]: 2 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
728 michael@paquier.xyz 827 [ # # ]:UBC 0 : ereport(LOG,
828 : : errmsg("starting point-in-time recovery to WAL location (LSN) \"%X/%08X\"",
829 : : LSN_FORMAT_ARGS(recoveryTargetLSN)));
728 michael@paquier.xyz 830 [ - + ]:CBC 2 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
728 michael@paquier.xyz 831 [ # # ]:UBC 0 : ereport(LOG,
832 : : (errmsg("starting point-in-time recovery to earliest consistent point")));
833 : : else
728 michael@paquier.xyz 834 [ + - ]:CBC 2 : ereport(LOG,
835 : : (errmsg("starting archive recovery")));
836 : : }
837 : :
838 : : /*
839 : : * If the location of the checkpoint record is not on the expected
840 : : * timeline in the history of the requested timeline, we cannot proceed:
841 : : * the backup is not part of the history of the requested timeline.
842 : : */
1349 heikki.linnakangas@i 843 [ - + ]: 907 : Assert(expectedTLEs); /* was initialized by reading checkpoint
844 : : * record */
845 [ - + ]: 907 : if (tliOfPointInHistory(CheckPointLoc, expectedTLEs) !=
846 : : CheckPointTLI)
847 : : {
848 : : XLogRecPtr switchpoint;
849 : :
850 : : /*
851 : : * tliSwitchPoint will throw an error if the checkpoint's timeline is
852 : : * not in expectedTLEs at all.
853 : : */
249 michael@paquier.xyz 854 :UBC 0 : switchpoint = tliSwitchPoint(CheckPointTLI, expectedTLEs, NULL);
1349 heikki.linnakangas@i 855 [ # # # # ]: 0 : ereport(FATAL,
856 : : (errmsg("requested timeline %u is not a child of this server's history",
857 : : recoveryTargetTLI),
858 : : /* translator: %s is a backup_label file or a pg_control file */
859 : : 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.",
860 : : haveBackupLabel ? "backup_label" : "pg_control",
861 : : LSN_FORMAT_ARGS(CheckPointLoc),
862 : : CheckPointTLI,
863 : : LSN_FORMAT_ARGS(switchpoint))));
864 : : }
865 : :
866 : : /*
867 : : * The min recovery point should be part of the requested timeline's
868 : : * history, too.
869 : : */
1349 heikki.linnakangas@i 870 [ + + ]:CBC 907 : if (!XLogRecPtrIsInvalid(ControlFile->minRecoveryPoint) &&
871 : 35 : tliOfPointInHistory(ControlFile->minRecoveryPoint - 1, expectedTLEs) !=
872 [ - + ]: 35 : ControlFile->minRecoveryPointTLI)
1349 heikki.linnakangas@i 873 [ # # ]:UBC 0 : ereport(FATAL,
874 : : errmsg("requested timeline %u does not contain minimum recovery point %X/%08X on timeline %u",
875 : : recoveryTargetTLI,
876 : : LSN_FORMAT_ARGS(ControlFile->minRecoveryPoint),
877 : : ControlFile->minRecoveryPointTLI));
878 : :
1349 heikki.linnakangas@i 879 [ + + + + ]:CBC 907 : ereport(DEBUG1,
880 : : errmsg_internal("redo record is at %X/%08X; shutdown %s",
881 : : LSN_FORMAT_ARGS(checkPoint.redo),
882 : : wasShutdown ? "true" : "false"));
883 [ + + ]: 907 : ereport(DEBUG1,
884 : : (errmsg_internal("next transaction ID: " UINT64_FORMAT "; next OID: %u",
885 : : U64FromFullTransactionId(checkPoint.nextXid),
886 : : checkPoint.nextOid)));
887 [ + + ]: 907 : ereport(DEBUG1,
888 : : (errmsg_internal("next MultiXactId: %u; next MultiXactOffset: %u",
889 : : checkPoint.nextMulti, checkPoint.nextMultiOffset)));
890 [ + + ]: 907 : ereport(DEBUG1,
891 : : (errmsg_internal("oldest unfrozen transaction ID: %u, in database %u",
892 : : checkPoint.oldestXid, checkPoint.oldestXidDB)));
893 [ + + ]: 907 : ereport(DEBUG1,
894 : : (errmsg_internal("oldest MultiXactId: %u, in database %u",
895 : : checkPoint.oldestMulti, checkPoint.oldestMultiDB)));
896 [ + + ]: 907 : ereport(DEBUG1,
897 : : (errmsg_internal("commit timestamp Xid oldest/newest: %u/%u",
898 : : checkPoint.oldestCommitTsXid,
899 : : checkPoint.newestCommitTsXid)));
900 [ - + ]: 907 : if (!TransactionIdIsNormal(XidFromFullTransactionId(checkPoint.nextXid)))
1349 heikki.linnakangas@i 901 [ # # ]:UBC 0 : ereport(PANIC,
902 : : (errmsg("invalid next transaction ID")));
903 : :
904 : : /* sanity check */
1349 heikki.linnakangas@i 905 [ - + ]:CBC 907 : if (checkPoint.redo > CheckPointLoc)
1349 heikki.linnakangas@i 906 [ # # ]:UBC 0 : ereport(PANIC,
907 : : (errmsg("invalid redo in checkpoint record")));
908 : :
909 : : /*
910 : : * Check whether we need to force recovery from WAL. If it appears to
911 : : * have been a clean shutdown and we did not have a recovery signal file,
912 : : * then assume no recovery needed.
913 : : */
1349 heikki.linnakangas@i 914 [ + + ]:CBC 907 : if (checkPoint.redo < CheckPointLoc)
915 : : {
916 [ - + ]: 105 : if (wasShutdown)
1349 heikki.linnakangas@i 917 [ # # ]:UBC 0 : ereport(PANIC,
918 : : (errmsg("invalid redo record in shutdown checkpoint")));
1349 heikki.linnakangas@i 919 :CBC 105 : InRecovery = true;
920 : : }
921 [ + + ]: 802 : else if (ControlFile->state != DB_SHUTDOWNED)
922 : 93 : InRecovery = true;
923 [ + + ]: 709 : else if (ArchiveRecoveryRequested)
924 : : {
925 : : /* force recovery due to presence of recovery signal file */
926 : 7 : InRecovery = true;
927 : : }
928 : :
929 : : /*
930 : : * If recovery is needed, update our in-memory copy of pg_control to show
931 : : * that we are recovering and to show the selected checkpoint as the place
932 : : * we are starting from. We also mark pg_control with any minimum recovery
933 : : * stop point obtained from a backup history file.
934 : : *
935 : : * We don't write the changes to disk yet, though. Only do that after
936 : : * initializing various subsystems.
937 : : */
938 [ + + ]: 907 : if (InRecovery)
939 : : {
940 [ + + ]: 205 : if (InArchiveRecovery)
941 : : {
942 : 107 : ControlFile->state = DB_IN_ARCHIVE_RECOVERY;
943 : : }
944 : : else
945 : : {
946 [ + - ]: 98 : ereport(LOG,
947 : : (errmsg("database system was not properly shut down; "
948 : : "automatic recovery in progress")));
949 [ + + ]: 98 : if (recoveryTargetTLI > ControlFile->checkPointCopy.ThisTimeLineID)
950 [ + - ]: 1 : ereport(LOG,
951 : : (errmsg("crash recovery starts in timeline %u "
952 : : "and has target timeline %u",
953 : : ControlFile->checkPointCopy.ThisTimeLineID,
954 : : recoveryTargetTLI)));
955 : 98 : ControlFile->state = DB_IN_CRASH_RECOVERY;
956 : : }
957 : 205 : ControlFile->checkPoint = CheckPointLoc;
958 : 205 : ControlFile->checkPointCopy = checkPoint;
959 [ + + ]: 205 : if (InArchiveRecovery)
960 : : {
961 : : /* initialize minRecoveryPoint if not set yet */
962 [ + + ]: 107 : if (ControlFile->minRecoveryPoint < checkPoint.redo)
963 : : {
964 : 73 : ControlFile->minRecoveryPoint = checkPoint.redo;
965 : 73 : ControlFile->minRecoveryPointTLI = checkPoint.ThisTimeLineID;
966 : : }
967 : : }
968 : :
969 : : /*
970 : : * Set backupStartPoint if we're starting recovery from a base backup.
971 : : *
972 : : * Also set backupEndPoint and use minRecoveryPoint as the backup end
973 : : * location if we're starting recovery from a base backup which was
974 : : * taken from a standby. In this case, the database system status in
975 : : * pg_control must indicate that the database was already in recovery.
976 : : * Usually that will be DB_IN_ARCHIVE_RECOVERY but also can be
977 : : * DB_SHUTDOWNED_IN_RECOVERY if recovery previously was interrupted
978 : : * before reaching this point; e.g. because restore_command or
979 : : * primary_conninfo were faulty.
980 : : *
981 : : * Any other state indicates that the backup somehow became corrupted
982 : : * and we can't sensibly continue with recovery.
983 : : */
984 [ + + ]: 205 : if (haveBackupLabel)
985 : : {
986 : 70 : ControlFile->backupStartPoint = checkPoint.redo;
987 : 70 : ControlFile->backupEndRequired = backupEndRequired;
988 : :
989 [ + + ]: 70 : if (backupFromStandby)
990 : : {
991 [ - + - - ]: 4 : if (dbstate_at_startup != DB_IN_ARCHIVE_RECOVERY &&
992 : : dbstate_at_startup != DB_SHUTDOWNED_IN_RECOVERY)
1349 heikki.linnakangas@i 993 [ # # ]:UBC 0 : ereport(FATAL,
994 : : (errmsg("backup_label contains data inconsistent with control file"),
995 : : errhint("This means that the backup is corrupted and you will "
996 : : "have to use another backup for recovery.")));
1349 heikki.linnakangas@i 997 :CBC 4 : ControlFile->backupEndPoint = ControlFile->minRecoveryPoint;
998 : : }
999 : : }
1000 : : }
1001 : :
1002 : : /* remember these, so that we know when we have reached consistency */
1003 : 907 : backupStartPoint = ControlFile->backupStartPoint;
1004 : 907 : backupEndRequired = ControlFile->backupEndRequired;
1005 : 907 : backupEndPoint = ControlFile->backupEndPoint;
1006 [ + + ]: 907 : if (InArchiveRecovery)
1007 : : {
1008 : 107 : minRecoveryPoint = ControlFile->minRecoveryPoint;
1009 : 107 : minRecoveryPointTLI = ControlFile->minRecoveryPointTLI;
1010 : : }
1011 : : else
1012 : : {
1013 : 800 : minRecoveryPoint = InvalidXLogRecPtr;
1014 : 800 : minRecoveryPointTLI = 0;
1015 : : }
1016 : :
1017 : : /*
1018 : : * Start recovery assuming that the final record isn't lost.
1019 : : */
1020 : 907 : abortedRecPtr = InvalidXLogRecPtr;
1021 : 907 : missingContrecPtr = InvalidXLogRecPtr;
1022 : :
1023 : 907 : *wasShutdown_ptr = wasShutdown;
1024 : 907 : *haveBackupLabel_ptr = haveBackupLabel;
1025 : 907 : *haveTblspcMap_ptr = haveTblspcMap;
1026 : 907 : }
1027 : :
1028 : : /*
1029 : : * See if there are any recovery signal files and if so, set state for
1030 : : * recovery.
1031 : : *
1032 : : * See if there is a recovery command file (recovery.conf), and if so
1033 : : * throw an ERROR since as of PG12 we no longer recognize that.
1034 : : */
1035 : : static void
1036 : 907 : readRecoverySignalFile(void)
1037 : : {
1038 : : struct stat stat_buf;
1039 : :
1040 [ + + ]: 907 : if (IsBootstrapProcessingMode())
1041 : 804 : return;
1042 : :
1043 : : /*
1044 : : * Check for old recovery API file: recovery.conf
1045 : : */
1046 [ - + ]: 857 : if (stat(RECOVERY_COMMAND_FILE, &stat_buf) == 0)
1349 heikki.linnakangas@i 1047 [ # # ]:UBC 0 : ereport(FATAL,
1048 : : (errcode_for_file_access(),
1049 : : errmsg("using recovery command file \"%s\" is not supported",
1050 : : RECOVERY_COMMAND_FILE)));
1051 : :
1052 : : /*
1053 : : * Remove unused .done file, if present. Ignore if absent.
1054 : : */
1349 heikki.linnakangas@i 1055 :CBC 857 : unlink(RECOVERY_COMMAND_DONE);
1056 : :
1057 : : /*
1058 : : * Check for recovery signal files and if found, fsync them since they
1059 : : * represent server state information. We don't sweat too much about the
1060 : : * possibility of fsync failure, however.
1061 : : *
1062 : : * If present, standby signal file takes precedence. If neither is present
1063 : : * then we won't enter archive recovery.
1064 : : */
1065 [ + + ]: 857 : if (stat(STANDBY_SIGNAL_FILE, &stat_buf) == 0)
1066 : : {
1067 : : int fd;
1068 : :
1069 : 98 : fd = BasicOpenFilePerm(STANDBY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1070 : : S_IRUSR | S_IWUSR);
1071 [ + - ]: 98 : if (fd >= 0)
1072 : : {
1073 : 98 : (void) pg_fsync(fd);
1074 : 98 : close(fd);
1075 : : }
1076 : 98 : standby_signal_file_found = true;
1077 : : }
1078 [ + + ]: 759 : else if (stat(RECOVERY_SIGNAL_FILE, &stat_buf) == 0)
1079 : : {
1080 : : int fd;
1081 : :
1082 : 5 : fd = BasicOpenFilePerm(RECOVERY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1083 : : S_IRUSR | S_IWUSR);
1084 [ + - ]: 5 : if (fd >= 0)
1085 : : {
1086 : 5 : (void) pg_fsync(fd);
1087 : 5 : close(fd);
1088 : : }
1089 : 5 : recovery_signal_file_found = true;
1090 : : }
1091 : :
1092 : 857 : StandbyModeRequested = false;
1093 : 857 : ArchiveRecoveryRequested = false;
1094 [ + + ]: 857 : if (standby_signal_file_found)
1095 : : {
1096 : 98 : StandbyModeRequested = true;
1097 : 98 : ArchiveRecoveryRequested = true;
1098 : : }
1099 [ + + ]: 759 : else if (recovery_signal_file_found)
1100 : : {
1101 : 5 : StandbyModeRequested = false;
1102 : 5 : ArchiveRecoveryRequested = true;
1103 : : }
1104 : : else
1105 : 754 : return;
1106 : :
1107 : : /*
1108 : : * We don't support standby mode in standalone backends; that requires
1109 : : * other processes such as the WAL receiver to be alive.
1110 : : */
1111 [ + + - + ]: 103 : if (StandbyModeRequested && !IsUnderPostmaster)
1349 heikki.linnakangas@i 1112 [ # # ]:UBC 0 : ereport(FATAL,
1113 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1114 : : errmsg("standby mode is not supported by single-user servers")));
1115 : : }
1116 : :
1117 : : static void
1349 heikki.linnakangas@i 1118 :CBC 907 : validateRecoveryParameters(void)
1119 : : {
1120 [ + + ]: 907 : if (!ArchiveRecoveryRequested)
1121 : 804 : return;
1122 : :
1123 : : /*
1124 : : * Check for compulsory parameters
1125 : : */
1126 [ + + ]: 103 : if (StandbyModeRequested)
1127 : : {
1128 [ + - + + ]: 98 : if ((PrimaryConnInfo == NULL || strcmp(PrimaryConnInfo, "") == 0) &&
1129 [ + - + + ]: 11 : (recoveryRestoreCommand == NULL || strcmp(recoveryRestoreCommand, "") == 0))
1130 [ + - ]: 2 : ereport(WARNING,
1131 : : (errmsg("specified neither \"primary_conninfo\" nor \"restore_command\""),
1132 : : errhint("The database server will regularly poll the pg_wal subdirectory to check for files placed there.")));
1133 : : }
1134 : : else
1135 : : {
1136 [ + - ]: 5 : if (recoveryRestoreCommand == NULL ||
1137 [ - + ]: 5 : strcmp(recoveryRestoreCommand, "") == 0)
1349 heikki.linnakangas@i 1138 [ # # ]:UBC 0 : ereport(FATAL,
1139 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1140 : : errmsg("must specify \"restore_command\" when standby mode is not enabled")));
1141 : : }
1142 : :
1143 : : /*
1144 : : * Override any inconsistent requests. Note that this is a change of
1145 : : * behaviour in 9.5; prior to this we simply ignored a request to pause if
1146 : : * hot_standby = off, which was surprising behaviour.
1147 : : */
1349 heikki.linnakangas@i 1148 [ + + ]:CBC 103 : if (recoveryTargetAction == RECOVERY_TARGET_ACTION_PAUSE &&
1149 [ + + ]: 96 : !EnableHotStandby)
1150 : 2 : recoveryTargetAction = RECOVERY_TARGET_ACTION_SHUTDOWN;
1151 : :
1152 : : /*
1153 : : * Final parsing of recovery_target_time string; see also
1154 : : * check_recovery_target_time().
1155 : : */
1156 [ - + ]: 103 : if (recoveryTarget == RECOVERY_TARGET_TIME)
1157 : : {
1349 heikki.linnakangas@i 1158 :UBC 0 : recoveryTargetTime = DatumGetTimestampTz(DirectFunctionCall3(timestamptz_in,
1159 : : CStringGetDatum(recovery_target_time_string),
1160 : : ObjectIdGetDatum(InvalidOid),
1161 : : Int32GetDatum(-1)));
1162 : : }
1163 : :
1164 : : /*
1165 : : * If user specified recovery_target_timeline, validate it or compute the
1166 : : * "latest" value. We can't do this until after we've gotten the restore
1167 : : * command and set InArchiveRecovery, because we need to fetch timeline
1168 : : * history files from the archive.
1169 : : */
1349 heikki.linnakangas@i 1170 [ - + ]:CBC 103 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1171 : : {
1349 heikki.linnakangas@i 1172 :UBC 0 : TimeLineID rtli = recoveryTargetTLIRequested;
1173 : :
1174 : : /* Timeline 1 does not have a history file, all else should */
1175 [ # # # # ]: 0 : if (rtli != 1 && !existsTimeLineHistory(rtli))
1176 [ # # ]: 0 : ereport(FATAL,
1177 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1178 : : errmsg("recovery target timeline %u does not exist",
1179 : : rtli)));
1180 : 0 : recoveryTargetTLI = rtli;
1181 : : }
1349 heikki.linnakangas@i 1182 [ + - ]:CBC 103 : else if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
1183 : : {
1184 : : /* We start the "latest" search from pg_control's timeline */
1185 : 103 : recoveryTargetTLI = findNewestTimeLine(recoveryTargetTLI);
1186 : : }
1187 : : else
1188 : : {
1189 : : /*
1190 : : * else we just use the recoveryTargetTLI as already read from
1191 : : * ControlFile
1192 : : */
1349 heikki.linnakangas@i 1193 [ # # ]:UBC 0 : Assert(recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_CONTROLFILE);
1194 : : }
1195 : : }
1196 : :
1197 : : /*
1198 : : * read_backup_label: check to see if a backup_label file is present
1199 : : *
1200 : : * If we see a backup_label during recovery, we assume that we are recovering
1201 : : * from a backup dump file, and we therefore roll forward from the checkpoint
1202 : : * identified by the label file, NOT what pg_control says. This avoids the
1203 : : * problem that pg_control might have been archived one or more checkpoints
1204 : : * later than the start of the dump, and so if we rely on it as the start
1205 : : * point, we will fail to restore a consistent database state.
1206 : : *
1207 : : * Returns true if a backup_label was found (and fills the checkpoint
1208 : : * location and TLI into *checkPointLoc and *backupLabelTLI, respectively);
1209 : : * returns false if not. If this backup_label came from a streamed backup,
1210 : : * *backupEndRequired is set to true. If this backup_label was created during
1211 : : * recovery, *backupFromStandby is set to true.
1212 : : *
1213 : : * Also sets the global variables RedoStartLSN and RedoStartTLI with the LSN
1214 : : * and TLI read from the backup file.
1215 : : */
1216 : : static bool
1349 heikki.linnakangas@i 1217 :CBC 907 : read_backup_label(XLogRecPtr *checkPointLoc, TimeLineID *backupLabelTLI,
1218 : : bool *backupEndRequired, bool *backupFromStandby)
1219 : : {
1220 : : char startxlogfilename[MAXFNAMELEN];
1221 : : TimeLineID tli_from_walseg,
1222 : : tli_from_file;
1223 : : FILE *lfp;
1224 : : char ch;
1225 : : char backuptype[20];
1226 : : char backupfrom[20];
1227 : : char backuplabel[MAXPGPATH];
1228 : : char backuptime[128];
1229 : : uint32 hi,
1230 : : lo;
1231 : :
1232 : : /* suppress possible uninitialized-variable warnings */
1233 : 907 : *checkPointLoc = InvalidXLogRecPtr;
1234 : 907 : *backupLabelTLI = 0;
1235 : 907 : *backupEndRequired = false;
1236 : 907 : *backupFromStandby = false;
1237 : :
1238 : : /*
1239 : : * See if label file is present
1240 : : */
1241 : 907 : lfp = AllocateFile(BACKUP_LABEL_FILE, "r");
1242 [ + + ]: 907 : if (!lfp)
1243 : : {
1244 [ - + ]: 837 : if (errno != ENOENT)
1349 heikki.linnakangas@i 1245 [ # # ]:UBC 0 : ereport(FATAL,
1246 : : (errcode_for_file_access(),
1247 : : errmsg("could not read file \"%s\": %m",
1248 : : BACKUP_LABEL_FILE)));
1349 heikki.linnakangas@i 1249 :CBC 837 : return false; /* it's not there, all is fine */
1250 : : }
1251 : :
1252 : : /*
1253 : : * Read and parse the START WAL LOCATION and CHECKPOINT lines (this code
1254 : : * is pretty crude, but we are not expecting any variability in the file
1255 : : * format).
1256 : : */
112 alvherre@kurilemu.de 1257 [ + - ]:GNC 70 : if (fscanf(lfp, "START WAL LOCATION: %X/%08X (file %08X%16s)%c",
1349 heikki.linnakangas@i 1258 [ - + ]:CBC 70 : &hi, &lo, &tli_from_walseg, startxlogfilename, &ch) != 5 || ch != '\n')
1349 heikki.linnakangas@i 1259 [ # # ]:UBC 0 : ereport(FATAL,
1260 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1261 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1349 heikki.linnakangas@i 1262 :CBC 70 : RedoStartLSN = ((uint64) hi) << 32 | lo;
1263 : 70 : RedoStartTLI = tli_from_walseg;
112 alvherre@kurilemu.de 1264 [ + - ]:GNC 70 : if (fscanf(lfp, "CHECKPOINT LOCATION: %X/%08X%c",
1349 heikki.linnakangas@i 1265 [ - + ]:CBC 70 : &hi, &lo, &ch) != 3 || ch != '\n')
1349 heikki.linnakangas@i 1266 [ # # ]:UBC 0 : ereport(FATAL,
1267 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1268 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1349 heikki.linnakangas@i 1269 :CBC 70 : *checkPointLoc = ((uint64) hi) << 32 | lo;
1270 : 70 : *backupLabelTLI = tli_from_walseg;
1271 : :
1272 : : /*
1273 : : * BACKUP METHOD lets us know if this was a typical backup ("streamed",
1274 : : * which could mean either pg_basebackup or the pg_backup_start/stop
1275 : : * method was used) or if this label came from somewhere else (the only
1276 : : * other option today being from pg_rewind). If this was a streamed
1277 : : * backup then we know that we need to play through until we get to the
1278 : : * end of the WAL which was generated during the backup (at which point we
1279 : : * will have reached consistency and backupEndRequired will be reset to be
1280 : : * false).
1281 : : */
1282 [ + - ]: 70 : if (fscanf(lfp, "BACKUP METHOD: %19s\n", backuptype) == 1)
1283 : : {
1284 [ + + ]: 70 : if (strcmp(backuptype, "streamed") == 0)
1285 : 69 : *backupEndRequired = true;
1286 : : }
1287 : :
1288 : : /*
1289 : : * BACKUP FROM lets us know if this was from a primary or a standby. If
1290 : : * it was from a standby, we'll double-check that the control file state
1291 : : * matches that of a standby.
1292 : : */
1293 [ + - ]: 70 : if (fscanf(lfp, "BACKUP FROM: %19s\n", backupfrom) == 1)
1294 : : {
1295 [ + + ]: 70 : if (strcmp(backupfrom, "standby") == 0)
1296 : 4 : *backupFromStandby = true;
1297 : : }
1298 : :
1299 : : /*
1300 : : * Parse START TIME and LABEL. Those are not mandatory fields for recovery
1301 : : * but checking for their presence is useful for debugging and the next
1302 : : * sanity checks. Cope also with the fact that the result buffers have a
1303 : : * pre-allocated size, hence if the backup_label file has been generated
1304 : : * with strings longer than the maximum assumed here an incorrect parsing
1305 : : * happens. That's fine as only minor consistency checks are done
1306 : : * afterwards.
1307 : : */
1308 [ + - ]: 70 : if (fscanf(lfp, "START TIME: %127[^\n]\n", backuptime) == 1)
1309 [ + + ]: 70 : ereport(DEBUG1,
1310 : : (errmsg_internal("backup time %s in file \"%s\"",
1311 : : backuptime, BACKUP_LABEL_FILE)));
1312 : :
1313 [ + + ]: 70 : if (fscanf(lfp, "LABEL: %1023[^\n]\n", backuplabel) == 1)
1314 [ + + ]: 69 : ereport(DEBUG1,
1315 : : (errmsg_internal("backup label %s in file \"%s\"",
1316 : : backuplabel, BACKUP_LABEL_FILE)));
1317 : :
1318 : : /*
1319 : : * START TIMELINE is new as of 11. Its parsing is not mandatory, still use
1320 : : * it as a sanity check if present.
1321 : : */
1322 [ + + ]: 70 : if (fscanf(lfp, "START TIMELINE: %u\n", &tli_from_file) == 1)
1323 : : {
1324 [ - + ]: 69 : if (tli_from_walseg != tli_from_file)
1349 heikki.linnakangas@i 1325 [ # # ]:UBC 0 : ereport(FATAL,
1326 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1327 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE),
1328 : : errdetail("Timeline ID parsed is %u, but expected %u.",
1329 : : tli_from_file, tli_from_walseg)));
1330 : :
1349 heikki.linnakangas@i 1331 [ + + ]:CBC 69 : ereport(DEBUG1,
1332 : : (errmsg_internal("backup timeline %u in file \"%s\"",
1333 : : tli_from_file, BACKUP_LABEL_FILE)));
1334 : : }
1335 : :
112 alvherre@kurilemu.de 1336 [ - + ]:GNC 70 : if (fscanf(lfp, "INCREMENTAL FROM LSN: %X/%08X\n", &hi, &lo) > 0)
677 rhaas@postgresql.org 1337 [ # # ]:UBC 0 : ereport(FATAL,
1338 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1339 : : errmsg("this is an incremental backup, not a data directory"),
1340 : : errhint("Use pg_combinebackup to reconstruct a valid data directory.")));
1341 : :
1349 heikki.linnakangas@i 1342 [ + - - + ]:CBC 70 : if (ferror(lfp) || FreeFile(lfp))
1349 heikki.linnakangas@i 1343 [ # # ]:UBC 0 : ereport(FATAL,
1344 : : (errcode_for_file_access(),
1345 : : errmsg("could not read file \"%s\": %m",
1346 : : BACKUP_LABEL_FILE)));
1347 : :
1349 heikki.linnakangas@i 1348 :CBC 70 : return true;
1349 : : }
1350 : :
1351 : : /*
1352 : : * read_tablespace_map: check to see if a tablespace_map file is present
1353 : : *
1354 : : * If we see a tablespace_map file during recovery, we assume that we are
1355 : : * recovering from a backup dump file, and we therefore need to create symlinks
1356 : : * as per the information present in tablespace_map file.
1357 : : *
1358 : : * Returns true if a tablespace_map file was found (and fills *tablespaces
1359 : : * with a tablespaceinfo struct for each tablespace listed in the file);
1360 : : * returns false if not.
1361 : : */
1362 : : static bool
1363 : 70 : read_tablespace_map(List **tablespaces)
1364 : : {
1365 : : tablespaceinfo *ti;
1366 : : FILE *lfp;
1367 : : char str[MAXPGPATH];
1368 : : int ch,
1369 : : i,
1370 : : n;
1371 : : bool was_backslash;
1372 : :
1373 : : /*
1374 : : * See if tablespace_map file is present
1375 : : */
1376 : 70 : lfp = AllocateFile(TABLESPACE_MAP, "r");
1377 [ + + ]: 70 : if (!lfp)
1378 : : {
1379 [ - + ]: 68 : if (errno != ENOENT)
1349 heikki.linnakangas@i 1380 [ # # ]:UBC 0 : ereport(FATAL,
1381 : : (errcode_for_file_access(),
1382 : : errmsg("could not read file \"%s\": %m",
1383 : : TABLESPACE_MAP)));
1349 heikki.linnakangas@i 1384 :CBC 68 : return false; /* it's not there, all is fine */
1385 : : }
1386 : :
1387 : : /*
1388 : : * Read and parse the link name and path lines from tablespace_map file
1389 : : * (this code is pretty crude, but we are not expecting any variability in
1390 : : * the file format). De-escape any backslashes that were inserted.
1391 : : */
1392 : 2 : i = 0;
1393 : 2 : was_backslash = false;
1394 [ + + ]: 77 : while ((ch = fgetc(lfp)) != EOF)
1395 : : {
1396 [ + - + + : 75 : if (!was_backslash && (ch == '\n' || ch == '\r'))
- + ]
1397 : 2 : {
1398 : : char *endp;
1399 : :
1400 [ - + ]: 2 : if (i == 0)
1349 heikki.linnakangas@i 1401 :UBC 0 : continue; /* \r immediately followed by \n */
1402 : :
1403 : : /*
1404 : : * The de-escaped line should contain an OID followed by exactly
1405 : : * one space followed by a path. The path might start with
1406 : : * spaces, so don't be too liberal about parsing.
1407 : : */
1349 heikki.linnakangas@i 1408 :CBC 2 : str[i] = '\0';
1409 : 2 : n = 0;
1410 [ + - + + ]: 12 : while (str[n] && str[n] != ' ')
1411 : 10 : n++;
1412 [ + - - + ]: 2 : if (n < 1 || n >= i - 1)
1349 heikki.linnakangas@i 1413 [ # # ]:UBC 0 : ereport(FATAL,
1414 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1415 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1349 heikki.linnakangas@i 1416 :CBC 2 : str[n++] = '\0';
1417 : :
1418 : 2 : ti = palloc0(sizeof(tablespaceinfo));
735 rhaas@postgresql.org 1419 : 2 : errno = 0;
1420 : 2 : ti->oid = strtoul(str, &endp, 10);
1421 [ + - + - : 2 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
735 rhaas@postgresql.org 1422 [ # # ]:UBC 0 : ereport(FATAL,
1423 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1424 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1349 heikki.linnakangas@i 1425 :CBC 2 : ti->path = pstrdup(str + n);
1426 : 2 : *tablespaces = lappend(*tablespaces, ti);
1427 : :
1428 : 2 : i = 0;
1429 : 2 : continue;
1430 : : }
1431 [ + - - + ]: 73 : else if (!was_backslash && ch == '\\')
1349 heikki.linnakangas@i 1432 :UBC 0 : was_backslash = true;
1433 : : else
1434 : : {
1349 heikki.linnakangas@i 1435 [ + - ]:CBC 73 : if (i < sizeof(str) - 1)
1436 : 73 : str[i++] = ch;
1437 : 73 : was_backslash = false;
1438 : : }
1439 : : }
1440 : :
1441 [ + - - + ]: 2 : if (i != 0 || was_backslash) /* last line not terminated? */
1349 heikki.linnakangas@i 1442 [ # # ]:UBC 0 : ereport(FATAL,
1443 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1444 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1445 : :
1349 heikki.linnakangas@i 1446 [ + - - + ]:CBC 2 : if (ferror(lfp) || FreeFile(lfp))
1349 heikki.linnakangas@i 1447 [ # # ]:UBC 0 : ereport(FATAL,
1448 : : (errcode_for_file_access(),
1449 : : errmsg("could not read file \"%s\": %m",
1450 : : TABLESPACE_MAP)));
1451 : :
1349 heikki.linnakangas@i 1452 :CBC 2 : return true;
1453 : : }
1454 : :
1455 : : /*
1456 : : * Finish WAL recovery.
1457 : : *
1458 : : * This does not close the 'xlogreader' yet, because in some cases the caller
1459 : : * still wants to re-read the last checkpoint record by calling
1460 : : * ReadCheckpointRecord().
1461 : : *
1462 : : * Returns the position of the last valid or applied record, after which new
1463 : : * WAL should be appended, information about why recovery was ended, and some
1464 : : * other things. See the EndOfWalRecoveryInfo struct for details.
1465 : : */
1466 : : EndOfWalRecoveryInfo *
1467 : 852 : FinishWalRecovery(void)
1468 : : {
1469 : 852 : EndOfWalRecoveryInfo *result = palloc(sizeof(EndOfWalRecoveryInfo));
1470 : : XLogRecPtr lastRec;
1471 : : TimeLineID lastRecTLI;
1472 : : XLogRecPtr endOfLog;
1473 : :
1474 : : /*
1475 : : * Kill WAL receiver, if it's still running, before we continue to write
1476 : : * the startup checkpoint and aborted-contrecord records. It will trump
1477 : : * over these records and subsequent ones if it's still alive when we
1478 : : * start writing WAL.
1479 : : */
1480 : 852 : XLogShutdownWalRcv();
1481 : :
1482 : : /*
1483 : : * Shutdown the slot sync worker to drop any temporary slots acquired by
1484 : : * it and to prevent it from keep trying to fetch the failover slots.
1485 : : *
1486 : : * We do not update the 'synced' column in 'pg_replication_slots' system
1487 : : * view from true to false here, as any failed update could leave 'synced'
1488 : : * column false for some slots. This could cause issues during slot sync
1489 : : * after restarting the server as a standby. While updating the 'synced'
1490 : : * column after switching to the new timeline is an option, it does not
1491 : : * simplify the handling for the 'synced' column. Therefore, we retain the
1492 : : * 'synced' column as true after promotion as it may provide useful
1493 : : * information about the slot origin.
1494 : : */
613 akapila@postgresql.o 1495 : 852 : ShutDownSlotSync();
1496 : :
1497 : : /*
1498 : : * We are now done reading the xlog from stream. Turn off streaming
1499 : : * recovery to force fetching the files (which would be required at end of
1500 : : * recovery, e.g., timeline history file) from archive or pg_wal.
1501 : : *
1502 : : * Note that standby mode must be turned off after killing WAL receiver,
1503 : : * i.e., calling XLogShutdownWalRcv().
1504 : : */
1349 heikki.linnakangas@i 1505 [ - + ]: 852 : Assert(!WalRcvStreaming());
1506 : 852 : StandbyMode = false;
1507 : :
1508 : : /*
1509 : : * Determine where to start writing WAL next.
1510 : : *
1511 : : * Re-fetch the last valid or last applied record, so we can identify the
1512 : : * exact endpoint of what we consider the valid portion of WAL. There may
1513 : : * be an incomplete continuation record after that, in which case
1514 : : * 'abortedRecPtr' and 'missingContrecPtr' are set and the caller will
1515 : : * write a special OVERWRITE_CONTRECORD message to mark that the rest of
1516 : : * it is intentionally missing. See CreateOverwriteContrecordRecord().
1517 : : *
1518 : : * An important side-effect of this is to load the last page into
1519 : : * xlogreader. The caller uses it to initialize the WAL for writing.
1520 : : */
1521 [ + + ]: 852 : if (!InRecovery)
1522 : : {
1523 : 702 : lastRec = CheckPointLoc;
1524 : 702 : lastRecTLI = CheckPointTLI;
1525 : : }
1526 : : else
1527 : : {
1528 : 150 : lastRec = XLogRecoveryCtl->lastReplayedReadRecPtr;
1529 : 150 : lastRecTLI = XLogRecoveryCtl->lastReplayedTLI;
1530 : : }
1299 tmunro@postgresql.or 1531 : 852 : XLogPrefetcherBeginRead(xlogprefetcher, lastRec);
1532 : 852 : (void) ReadRecord(xlogprefetcher, PANIC, false, lastRecTLI);
1349 heikki.linnakangas@i 1533 : 852 : endOfLog = xlogreader->EndRecPtr;
1534 : :
1535 : : /*
1536 : : * Remember the TLI in the filename of the XLOG segment containing the
1537 : : * end-of-log. It could be different from the timeline that endOfLog
1538 : : * nominally belongs to, if there was a timeline switch in that segment,
1539 : : * and we were reading the old WAL from a segment belonging to a higher
1540 : : * timeline.
1541 : : */
1542 : 852 : result->endOfLogTLI = xlogreader->seg.ws_tli;
1543 : :
1544 [ + + ]: 852 : if (ArchiveRecoveryRequested)
1545 : : {
1546 : : /*
1547 : : * We are no longer in archive recovery state.
1548 : : *
1549 : : * We are now done reading the old WAL. Turn off archive fetching if
1550 : : * it was active.
1551 : : */
1552 [ - + ]: 48 : Assert(InArchiveRecovery);
1553 : 48 : InArchiveRecovery = false;
1554 : :
1555 : : /*
1556 : : * If the ending log segment is still open, close it (to avoid
1557 : : * problems on Windows with trying to rename or delete an open file).
1558 : : */
1559 [ + - ]: 48 : if (readFile >= 0)
1560 : : {
1561 : 48 : close(readFile);
1562 : 48 : readFile = -1;
1563 : : }
1564 : : }
1565 : :
1566 : : /*
1567 : : * Copy the last partial block to the caller, for initializing the WAL
1568 : : * buffer for appending new WAL.
1569 : : */
1570 [ + + ]: 852 : if (endOfLog % XLOG_BLCKSZ != 0)
1571 : : {
1572 : : char *page;
1573 : : int len;
1574 : : XLogRecPtr pageBeginPtr;
1575 : :
1576 : 837 : pageBeginPtr = endOfLog - (endOfLog % XLOG_BLCKSZ);
1577 [ - + ]: 837 : Assert(readOff == XLogSegmentOffset(pageBeginPtr, wal_segment_size));
1578 : :
1579 : : /* Copy the valid part of the last block */
1580 : 837 : len = endOfLog % XLOG_BLCKSZ;
1581 : 837 : page = palloc(len);
1582 : 837 : memcpy(page, xlogreader->readBuf, len);
1583 : :
1584 : 837 : result->lastPageBeginPtr = pageBeginPtr;
1585 : 837 : result->lastPage = page;
1586 : : }
1587 : : else
1588 : : {
1589 : : /* There is no partial block to copy. */
1590 : 15 : result->lastPageBeginPtr = endOfLog;
1591 : 15 : result->lastPage = NULL;
1592 : : }
1593 : :
1594 : : /*
1595 : : * Create a comment for the history file to explain why and where timeline
1596 : : * changed.
1597 : : */
1598 : 852 : result->recoveryStopReason = getRecoveryStopReason();
1599 : :
1600 : 852 : result->lastRec = lastRec;
1601 : 852 : result->lastRecTLI = lastRecTLI;
1602 : 852 : result->endOfLog = endOfLog;
1603 : :
1604 : 852 : result->abortedRecPtr = abortedRecPtr;
1605 : 852 : result->missingContrecPtr = missingContrecPtr;
1606 : :
1607 : 852 : result->standby_signal_file_found = standby_signal_file_found;
1608 : 852 : result->recovery_signal_file_found = recovery_signal_file_found;
1609 : :
1610 : 852 : return result;
1611 : : }
1612 : :
1613 : : /*
1614 : : * Clean up the WAL reader and leftovers from restoring WAL from archive
1615 : : */
1616 : : void
1617 : 852 : ShutdownWalRecovery(void)
1618 : : {
1619 : : char recoveryPath[MAXPGPATH];
1620 : :
1621 : : /* Final update of pg_stat_recovery_prefetch. */
1299 tmunro@postgresql.or 1622 : 852 : XLogPrefetcherComputeStats(xlogprefetcher);
1623 : :
1624 : : /* Shut down xlogreader */
1349 heikki.linnakangas@i 1625 [ + + ]: 852 : if (readFile >= 0)
1626 : : {
1627 : 804 : close(readFile);
1628 : 804 : readFile = -1;
1629 : : }
86 tgl@sss.pgh.pa.us 1630 :GNC 852 : pfree(xlogreader->private_data);
1349 heikki.linnakangas@i 1631 :CBC 852 : XLogReaderFree(xlogreader);
1299 tmunro@postgresql.or 1632 : 852 : XLogPrefetcherFree(xlogprefetcher);
1633 : :
1349 heikki.linnakangas@i 1634 [ + + ]: 852 : if (ArchiveRecoveryRequested)
1635 : : {
1636 : : /*
1637 : : * Since there might be a partial WAL segment named RECOVERYXLOG, get
1638 : : * rid of it.
1639 : : */
1640 : 48 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYXLOG");
1641 : 48 : unlink(recoveryPath); /* ignore any error */
1642 : :
1643 : : /* Get rid of any remaining recovered timeline-history file, too */
1644 : 48 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYHISTORY");
1645 : 48 : unlink(recoveryPath); /* ignore any error */
1646 : : }
1647 : :
1648 : : /*
1649 : : * We don't need the latch anymore. It's not strictly necessary to disown
1650 : : * it, but let's do it for the sake of tidiness.
1651 : : */
1652 [ + + ]: 852 : if (ArchiveRecoveryRequested)
1653 : 48 : DisownLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
1654 : 852 : }
1655 : :
1656 : : /*
1657 : : * Perform WAL recovery.
1658 : : *
1659 : : * If the system was shut down cleanly, this is never called.
1660 : : */
1661 : : void
1662 : 205 : PerformWalRecovery(void)
1663 : : {
1664 : : XLogRecord *record;
1665 : 205 : bool reachedRecoveryTarget = false;
1666 : : TimeLineID replayTLI;
1667 : :
1668 : : /*
1669 : : * Initialize shared variables for tracking progress of WAL replay, as if
1670 : : * we had just replayed the record before the REDO location (or the
1671 : : * checkpoint record itself, if it's a shutdown checkpoint).
1672 : : */
1673 [ - + ]: 205 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1674 [ + + ]: 205 : if (RedoStartLSN < CheckPointLoc)
1675 : : {
1676 : 105 : XLogRecoveryCtl->lastReplayedReadRecPtr = InvalidXLogRecPtr;
1677 : 105 : XLogRecoveryCtl->lastReplayedEndRecPtr = RedoStartLSN;
1678 : 105 : XLogRecoveryCtl->lastReplayedTLI = RedoStartTLI;
1679 : : }
1680 : : else
1681 : : {
1682 : 100 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
1683 : 100 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
1684 : 100 : XLogRecoveryCtl->lastReplayedTLI = CheckPointTLI;
1685 : : }
1686 : 205 : XLogRecoveryCtl->replayEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
1687 : 205 : XLogRecoveryCtl->replayEndTLI = XLogRecoveryCtl->lastReplayedTLI;
1688 : 205 : XLogRecoveryCtl->recoveryLastXTime = 0;
1689 : 205 : XLogRecoveryCtl->currentChunkStartTime = 0;
1690 : 205 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
1691 : 205 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1692 : :
1693 : : /* Also ensure XLogReceiptTime has a sane value */
1694 : 205 : XLogReceiptTime = GetCurrentTimestamp();
1695 : :
1696 : : /*
1697 : : * Let postmaster know we've started redo now, so that it can launch the
1698 : : * archiver if necessary.
1699 : : */
1700 [ + + ]: 205 : if (IsUnderPostmaster)
1701 : 196 : SendPostmasterSignal(PMSIGNAL_RECOVERY_STARTED);
1702 : :
1703 : : /*
1704 : : * Allow read-only connections immediately if we're consistent already.
1705 : : */
1706 : 205 : CheckRecoveryConsistency();
1707 : :
1708 : : /*
1709 : : * Find the first record that logically follows the checkpoint --- it
1710 : : * might physically precede it, though.
1711 : : */
1712 [ + + ]: 205 : if (RedoStartLSN < CheckPointLoc)
1713 : : {
1714 : : /* back up to find the record */
1715 : 105 : replayTLI = RedoStartTLI;
1299 tmunro@postgresql.or 1716 : 105 : XLogPrefetcherBeginRead(xlogprefetcher, RedoStartLSN);
1717 : 105 : record = ReadRecord(xlogprefetcher, PANIC, false, replayTLI);
1718 : :
1719 : : /*
1720 : : * If a checkpoint record's redo pointer points back to an earlier
1721 : : * LSN, the record at that LSN should be an XLOG_CHECKPOINT_REDO
1722 : : * record.
1723 : : */
739 rhaas@postgresql.org 1724 [ + - ]: 105 : if (record->xl_rmid != RM_XLOG_ID ||
1725 [ - + ]: 105 : (record->xl_info & ~XLR_INFO_MASK) != XLOG_CHECKPOINT_REDO)
739 rhaas@postgresql.org 1726 [ # # ]:UBC 0 : ereport(FATAL,
1727 : : errmsg("unexpected record type found at redo point %X/%08X",
1728 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1729 : : }
1730 : : else
1731 : : {
1732 : : /* just have to read next record after CheckPoint */
1349 heikki.linnakangas@i 1733 [ - + ]:CBC 100 : Assert(xlogreader->ReadRecPtr == CheckPointLoc);
1734 : 100 : replayTLI = CheckPointTLI;
1299 tmunro@postgresql.or 1735 : 100 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1736 : : }
1737 : :
1349 heikki.linnakangas@i 1738 [ + + ]: 205 : if (record != NULL)
1739 : : {
1740 : : TimestampTz xtime;
1741 : : PGRUsage ru0;
1742 : :
1743 : 197 : pg_rusage_init(&ru0);
1744 : :
1745 : 197 : InRedo = true;
1746 : :
1300 jdavis@postgresql.or 1747 : 197 : RmgrStartup();
1748 : :
1349 heikki.linnakangas@i 1749 [ + - ]: 197 : ereport(LOG,
1750 : : errmsg("redo starts at %X/%08X",
1751 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1752 : :
1753 : : /* Prepare to report progress of the redo phase. */
1754 [ + + ]: 197 : if (!StandbyMode)
1755 : 104 : begin_startup_progress_phase();
1756 : :
1757 : : /*
1758 : : * main redo apply loop
1759 : : */
1760 : : do
1761 : : {
1762 [ + + ]: 2739652 : if (!StandbyMode)
112 alvherre@kurilemu.de 1763 [ - + - - ]:GNC 262563 : ereport_startup_progress("redo in progress, elapsed time: %ld.%02d s, current LSN: %X/%08X",
1764 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr));
1765 : :
1766 : : #ifdef WAL_DEBUG
1767 : : if (XLOG_DEBUG)
1768 : : {
1769 : : StringInfoData buf;
1770 : :
1771 : : initStringInfo(&buf);
1772 : : appendStringInfo(&buf, "REDO @ %X/%08X; LSN %X/%08X: ",
1773 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1774 : : LSN_FORMAT_ARGS(xlogreader->EndRecPtr));
1775 : : xlog_outrec(&buf, xlogreader);
1776 : : appendStringInfoString(&buf, " - ");
1777 : : xlog_outdesc(&buf, xlogreader);
1778 : : elog(LOG, "%s", buf.data);
1779 : : pfree(buf.data);
1780 : : }
1781 : : #endif
1782 : :
1783 : : /* Handle interrupt signals of startup process */
236 heikki.linnakangas@i 1784 :CBC 2739652 : ProcessStartupProcInterrupts();
1785 : :
1786 : : /*
1787 : : * Pause WAL replay, if requested by a hot-standby session via
1788 : : * SetRecoveryPause().
1789 : : *
1790 : : * Note that we intentionally don't take the info_lck spinlock
1791 : : * here. We might therefore read a slightly stale value of the
1792 : : * recoveryPause flag, but it can't be very stale (no worse than
1793 : : * the last spinlock we did acquire). Since a pause request is a
1794 : : * pretty asynchronous thing anyway, possibly responding to it one
1795 : : * WAL record later than we otherwise would is a minor issue, so
1796 : : * it doesn't seem worth adding another spinlock cycle to prevent
1797 : : * that.
1798 : : */
1349 1799 [ - + ]: 2739652 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1800 : : RECOVERY_NOT_PAUSED)
1349 heikki.linnakangas@i 1801 :UBC 0 : recoveryPausesHere(false);
1802 : :
1803 : : /*
1804 : : * Have we reached our recovery target?
1805 : : */
1349 heikki.linnakangas@i 1806 [ + + ]:CBC 2739652 : if (recoveryStopsBefore(xlogreader))
1807 : : {
1808 : 2 : reachedRecoveryTarget = true;
1809 : 2 : break;
1810 : : }
1811 : :
1812 : : /*
1813 : : * If we've been asked to lag the primary, wait on latch until
1814 : : * enough time has passed.
1815 : : */
1816 [ - + ]: 2739650 : if (recoveryApplyDelay(xlogreader))
1817 : : {
1818 : : /*
1819 : : * We test for paused recovery again here. If user sets
1820 : : * delayed apply, it may be because they expect to pause
1821 : : * recovery in case of problems, so we must test again here
1822 : : * otherwise pausing during the delay-wait wouldn't work.
1823 : : */
1349 heikki.linnakangas@i 1824 [ # # ]:UBC 0 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1825 : : RECOVERY_NOT_PAUSED)
1826 : 0 : recoveryPausesHere(false);
1827 : : }
1828 : :
1829 : : /*
1830 : : * Apply the record
1831 : : */
1349 heikki.linnakangas@i 1832 :CBC 2739650 : ApplyWalRecord(xlogreader, record, &replayTLI);
1833 : :
1834 : : /* Exit loop if we reached inclusive recovery target */
1835 [ + + ]: 2739648 : if (recoveryStopsAfter(xlogreader))
1836 : : {
1837 : 5 : reachedRecoveryTarget = true;
1838 : 5 : break;
1839 : : }
1840 : :
1841 : : /* Else, try to fetch the next WAL record */
1299 tmunro@postgresql.or 1842 : 2739643 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1349 heikki.linnakangas@i 1843 [ + + ]: 2739591 : } while (record != NULL);
1844 : :
1845 : : /*
1846 : : * end of main redo apply loop
1847 : : */
1848 : :
1849 [ + + ]: 143 : if (reachedRecoveryTarget)
1850 : : {
1851 [ - + ]: 7 : if (!reachedConsistency)
1349 heikki.linnakangas@i 1852 [ # # ]:UBC 0 : ereport(FATAL,
1853 : : (errmsg("requested recovery stop point is before consistent recovery point")));
1854 : :
1855 : : /*
1856 : : * This is the last point where we can restart recovery with a new
1857 : : * recovery target, if we shutdown and begin again. After this,
1858 : : * Resource Managers may choose to do permanent corrective actions
1859 : : * at end of recovery.
1860 : : */
1349 heikki.linnakangas@i 1861 [ - + + - ]:CBC 7 : switch (recoveryTargetAction)
1862 : : {
1349 heikki.linnakangas@i 1863 :UBC 0 : case RECOVERY_TARGET_ACTION_SHUTDOWN:
1864 : :
1865 : : /*
1866 : : * exit with special return code to request shutdown of
1867 : : * postmaster. Log messages issued from postmaster.
1868 : : */
1869 : 0 : proc_exit(3);
1870 : :
1349 heikki.linnakangas@i 1871 :CBC 1 : case RECOVERY_TARGET_ACTION_PAUSE:
1872 : 1 : SetRecoveryPause(true);
1873 : 1 : recoveryPausesHere(true);
1874 : :
1875 : : /* drop into promote */
1876 : :
1877 : 7 : case RECOVERY_TARGET_ACTION_PROMOTE:
1878 : 7 : break;
1879 : : }
1880 : : }
1881 : :
1300 jdavis@postgresql.or 1882 : 143 : RmgrCleanup();
1883 : :
1349 heikki.linnakangas@i 1884 [ + - ]: 143 : ereport(LOG,
1885 : : errmsg("redo done at %X/%08X system usage: %s",
1886 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1887 : : pg_rusage_show(&ru0)));
1888 : 143 : xtime = GetLatestXTime();
1889 [ + + ]: 143 : if (xtime)
1890 [ + - ]: 34 : ereport(LOG,
1891 : : (errmsg("last completed transaction was at log time %s",
1892 : : timestamptz_to_str(xtime))));
1893 : :
1894 : 143 : InRedo = false;
1895 : : }
1896 : : else
1897 : : {
1898 : : /* there are no WAL records following the checkpoint */
1899 [ + - ]: 8 : ereport(LOG,
1900 : : (errmsg("redo is not required")));
1901 : : }
1902 : :
1903 : : /*
1904 : : * This check is intentionally after the above log messages that indicate
1905 : : * how far recovery went.
1906 : : */
1907 [ + + ]: 151 : if (ArchiveRecoveryRequested &&
1908 [ + + ]: 49 : recoveryTarget != RECOVERY_TARGET_UNSET &&
1909 [ + + ]: 8 : !reachedRecoveryTarget)
1910 [ + - ]: 1 : ereport(FATAL,
1911 : : (errcode(ERRCODE_CONFIG_FILE_ERROR),
1912 : : errmsg("recovery ended before configured recovery target was reached")));
1913 : 150 : }
1914 : :
1915 : : /*
1916 : : * Subroutine of PerformWalRecovery, to apply one WAL record.
1917 : : */
1918 : : static void
1919 : 2739650 : ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI)
1920 : : {
1921 : : ErrorContextCallback errcallback;
1922 : 2739650 : bool switchedTLI = false;
1923 : :
1924 : : /* Setup error traceback support for ereport() */
1925 : 2739650 : errcallback.callback = rm_redo_error_callback;
333 peter@eisentraut.org 1926 : 2739650 : errcallback.arg = xlogreader;
1349 heikki.linnakangas@i 1927 : 2739650 : errcallback.previous = error_context_stack;
1928 : 2739650 : error_context_stack = &errcallback;
1929 : :
1930 : : /*
1931 : : * TransamVariables->nextXid must be beyond record's xid.
1932 : : */
1933 : 2739650 : AdvanceNextFullTransactionIdPastXid(record->xl_xid);
1934 : :
1935 : : /*
1936 : : * Before replaying this record, check if this record causes the current
1937 : : * timeline to change. The record is already considered to be part of the
1938 : : * new timeline, so we update replayTLI before replaying it. That's
1939 : : * important so that replayEndTLI, which is recorded as the minimum
1940 : : * recovery point's TLI if recovery stops after this record, is set
1941 : : * correctly.
1942 : : */
1943 [ + + ]: 2739650 : if (record->xl_rmid == RM_XLOG_ID)
1944 : : {
1945 : 40571 : TimeLineID newReplayTLI = *replayTLI;
1946 : 40571 : TimeLineID prevReplayTLI = *replayTLI;
1947 : 40571 : uint8 info = record->xl_info & ~XLR_INFO_MASK;
1948 : :
1949 [ + + ]: 40571 : if (info == XLOG_CHECKPOINT_SHUTDOWN)
1950 : : {
1951 : : CheckPoint checkPoint;
1952 : :
1953 : 31 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
1954 : 31 : newReplayTLI = checkPoint.ThisTimeLineID;
1955 : 31 : prevReplayTLI = checkPoint.PrevTimeLineID;
1956 : : }
1957 [ + + ]: 40540 : else if (info == XLOG_END_OF_RECOVERY)
1958 : : {
1959 : : xl_end_of_recovery xlrec;
1960 : :
1961 : 9 : memcpy(&xlrec, XLogRecGetData(xlogreader), sizeof(xl_end_of_recovery));
1962 : 9 : newReplayTLI = xlrec.ThisTimeLineID;
1963 : 9 : prevReplayTLI = xlrec.PrevTimeLineID;
1964 : : }
1965 : :
1966 [ + + ]: 40571 : if (newReplayTLI != *replayTLI)
1967 : : {
1968 : : /* Check that it's OK to switch to this TLI */
1969 : 10 : checkTimeLineSwitch(xlogreader->EndRecPtr,
1970 : : newReplayTLI, prevReplayTLI, *replayTLI);
1971 : :
1972 : : /* Following WAL records should be run with new TLI */
1973 : 10 : *replayTLI = newReplayTLI;
1974 : 10 : switchedTLI = true;
1975 : : }
1976 : : }
1977 : :
1978 : : /*
1979 : : * Update shared replayEndRecPtr before replaying this record, so that
1980 : : * XLogFlush will update minRecoveryPoint correctly.
1981 : : */
1982 [ + + ]: 2739650 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1983 : 2739650 : XLogRecoveryCtl->replayEndRecPtr = xlogreader->EndRecPtr;
1984 : 2739650 : XLogRecoveryCtl->replayEndTLI = *replayTLI;
1985 : 2739650 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1986 : :
1987 : : /*
1988 : : * If we are attempting to enter Hot Standby mode, process XIDs we see
1989 : : */
1990 [ + + ]: 2739650 : if (standbyState >= STANDBY_INITIALIZED &&
1991 [ + + ]: 2496444 : TransactionIdIsValid(record->xl_xid))
1992 : 2444840 : RecordKnownAssignedTransactionIds(record->xl_xid);
1993 : :
1994 : : /*
1995 : : * Some XLOG record types that are related to recovery are processed
1996 : : * directly here, rather than in xlog_redo()
1997 : : */
1998 [ + + ]: 2739650 : if (record->xl_rmid == RM_XLOG_ID)
1999 : 40571 : xlogrecovery_redo(xlogreader, *replayTLI);
2000 : :
2001 : : /* Now apply the WAL record itself */
1300 jdavis@postgresql.or 2002 : 2739650 : GetRmgr(record->xl_rmid).rm_redo(xlogreader);
2003 : :
2004 : : /*
2005 : : * After redo, check whether the backup pages associated with the WAL
2006 : : * record are consistent with the existing pages. This check is done only
2007 : : * if consistency check is enabled for this record.
2008 : : */
1349 heikki.linnakangas@i 2009 [ + + ]: 2739648 : if ((record->xl_info & XLR_CHECK_CONSISTENCY) != 0)
2010 : 2166977 : verifyBackupPageConsistency(xlogreader);
2011 : :
2012 : : /* Pop the error context stack */
2013 : 2739648 : error_context_stack = errcallback.previous;
2014 : :
2015 : : /*
2016 : : * Update lastReplayedEndRecPtr after this record has been successfully
2017 : : * replayed.
2018 : : */
2019 [ + + ]: 2739648 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
2020 : 2739648 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
2021 : 2739648 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
2022 : 2739648 : XLogRecoveryCtl->lastReplayedTLI = *replayTLI;
2023 : 2739648 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
2024 : :
2025 : : /* ------
2026 : : * Wakeup walsenders:
2027 : : *
2028 : : * On the standby, the WAL is flushed first (which will only wake up
2029 : : * physical walsenders) and then applied, which will only wake up logical
2030 : : * walsenders.
2031 : : *
2032 : : * Indeed, logical walsenders on standby can't decode and send data until
2033 : : * it's been applied.
2034 : : *
2035 : : * Physical walsenders don't need to be woken up during replay unless
2036 : : * cascading replication is allowed and time line change occurred (so that
2037 : : * they can notice that they are on a new time line).
2038 : : *
2039 : : * That's why the wake up conditions are for:
2040 : : *
2041 : : * - physical walsenders in case of new time line and cascade
2042 : : * replication is allowed
2043 : : * - logical walsenders in case cascade replication is allowed (could not
2044 : : * be created otherwise)
2045 : : * ------
2046 : : */
933 andres@anarazel.de 2047 [ + + + + ]: 2739648 : if (AllowCascadeReplication())
2048 : 2550481 : WalSndWakeup(switchedTLI, true);
2049 : :
2050 : : /*
2051 : : * If rm_redo called XLogRequestWalReceiverReply, then we wake up the
2052 : : * receiver so that it notices the updated lastReplayedEndRecPtr and sends
2053 : : * a reply to the primary.
2054 : : */
1349 heikki.linnakangas@i 2055 [ + + ]: 2739648 : if (doRequestWalReceiverReply)
2056 : : {
2057 : 2 : doRequestWalReceiverReply = false;
2058 : 2 : WalRcvForceReply();
2059 : : }
2060 : :
2061 : : /* Allow read-only connections if we're consistent now */
2062 : 2739648 : CheckRecoveryConsistency();
2063 : :
2064 : : /* Is this a timeline switch? */
2065 [ + + ]: 2739648 : if (switchedTLI)
2066 : : {
2067 : : /*
2068 : : * Before we continue on the new timeline, clean up any (possibly
2069 : : * bogus) future WAL segments on the old timeline.
2070 : : */
2071 : 10 : RemoveNonParentXlogFiles(xlogreader->EndRecPtr, *replayTLI);
2072 : :
2073 : : /* Reset the prefetcher. */
1299 tmunro@postgresql.or 2074 : 10 : XLogPrefetchReconfigure();
2075 : : }
1349 heikki.linnakangas@i 2076 : 2739648 : }
2077 : :
2078 : : /*
2079 : : * Some XLOG RM record types that are directly related to WAL recovery are
2080 : : * handled here rather than in the xlog_redo()
2081 : : */
2082 : : static void
2083 : 40571 : xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI)
2084 : : {
2085 : 40571 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2086 : 40571 : XLogRecPtr lsn = record->EndRecPtr;
2087 : :
2088 [ - + ]: 40571 : Assert(XLogRecGetRmid(record) == RM_XLOG_ID);
2089 : :
2090 [ + + ]: 40571 : if (info == XLOG_OVERWRITE_CONTRECORD)
2091 : : {
2092 : : /* Verify the payload of a XLOG_OVERWRITE_CONTRECORD record. */
2093 : : xl_overwrite_contrecord xlrec;
2094 : :
2095 : 1 : memcpy(&xlrec, XLogRecGetData(record), sizeof(xl_overwrite_contrecord));
2096 [ - + ]: 1 : if (xlrec.overwritten_lsn != record->overwrittenRecPtr)
112 alvherre@kurilemu.de 2097 [ # # ]:UNC 0 : elog(FATAL, "mismatching overwritten LSN %X/%08X -> %X/%08X",
2098 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2099 : : LSN_FORMAT_ARGS(record->overwrittenRecPtr));
2100 : :
2101 : : /* We have safely skipped the aborted record */
1314 alvherre@alvh.no-ip. 2102 :CBC 1 : abortedRecPtr = InvalidXLogRecPtr;
2103 : 1 : missingContrecPtr = InvalidXLogRecPtr;
2104 : :
1349 heikki.linnakangas@i 2105 [ + - ]: 1 : ereport(LOG,
2106 : : errmsg("successfully skipped missing contrecord at %X/%08X, overwritten at %s",
2107 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2108 : : timestamptz_to_str(xlrec.overwrite_time)));
2109 : :
2110 : : /* Verifying the record should only happen once */
2111 : 1 : record->overwrittenRecPtr = InvalidXLogRecPtr;
2112 : : }
2113 [ + + ]: 40570 : else if (info == XLOG_BACKUP_END)
2114 : : {
2115 : : XLogRecPtr startpoint;
2116 : :
2117 : 82 : memcpy(&startpoint, XLogRecGetData(record), sizeof(startpoint));
2118 : :
2119 [ + + ]: 82 : if (backupStartPoint == startpoint)
2120 : : {
2121 : : /*
2122 : : * We have reached the end of base backup, the point where
2123 : : * pg_backup_stop() was done. The data on disk is now consistent
2124 : : * (assuming we have also reached minRecoveryPoint). Set
2125 : : * backupEndPoint to the current LSN, so that the next call to
2126 : : * CheckRecoveryConsistency() will notice it and do the
2127 : : * end-of-backup processing.
2128 : : */
2129 [ + + ]: 68 : elog(DEBUG1, "end of backup record reached");
2130 : :
2131 : 68 : backupEndPoint = lsn;
2132 : : }
2133 : : else
112 alvherre@kurilemu.de 2134 [ - + ]:GNC 14 : elog(DEBUG1, "saw end-of-backup record for backup starting at %X/%08X, waiting for %X/%08X",
2135 : : LSN_FORMAT_ARGS(startpoint), LSN_FORMAT_ARGS(backupStartPoint));
2136 : : }
1349 heikki.linnakangas@i 2137 :CBC 40571 : }
2138 : :
2139 : : /*
2140 : : * Verify that, in non-test mode, ./pg_tblspc doesn't contain any real
2141 : : * directories.
2142 : : *
2143 : : * Replay of database creation XLOG records for databases that were later
2144 : : * dropped can create fake directories in pg_tblspc. By the time consistency
2145 : : * is reached these directories should have been removed; here we verify
2146 : : * that this did indeed happen. This is to be called at the point where
2147 : : * consistent state is reached.
2148 : : *
2149 : : * allow_in_place_tablespaces turns the PANIC into a WARNING, which is
2150 : : * useful for testing purposes, and also allows for an escape hatch in case
2151 : : * things go south.
2152 : : */
2153 : : static void
1187 alvherre@alvh.no-ip. 2154 : 109 : CheckTablespaceDirectory(void)
2155 : : {
2156 : : DIR *dir;
2157 : : struct dirent *de;
2158 : :
419 michael@paquier.xyz 2159 : 109 : dir = AllocateDir(PG_TBLSPC_DIR);
2160 [ + + ]: 334 : while ((de = ReadDir(dir, PG_TBLSPC_DIR)) != NULL)
2161 : : {
2162 : : char path[MAXPGPATH + sizeof(PG_TBLSPC_DIR)];
2163 : :
2164 : : /* Skip entries of non-oid names */
1187 alvherre@alvh.no-ip. 2165 [ + + ]: 225 : if (strspn(de->d_name, "0123456789") != strlen(de->d_name))
2166 : 218 : continue;
2167 : :
419 michael@paquier.xyz 2168 : 7 : snprintf(path, sizeof(path), "%s/%s", PG_TBLSPC_DIR, de->d_name);
2169 : :
1187 alvherre@alvh.no-ip. 2170 [ + + ]: 7 : if (get_dirent_type(path, de, false, ERROR) != PGFILETYPE_LNK)
2171 [ + - + - ]: 4 : ereport(allow_in_place_tablespaces ? WARNING : PANIC,
2172 : : (errcode(ERRCODE_DATA_CORRUPTED),
2173 : : errmsg("unexpected directory entry \"%s\" found in %s",
2174 : : de->d_name, PG_TBLSPC_DIR),
2175 : : errdetail("All directory entries in %s/ should be symbolic links.",
2176 : : PG_TBLSPC_DIR),
2177 : : errhint("Remove those directories, or set \"allow_in_place_tablespaces\" to ON transiently to let recovery complete.")));
2178 : : }
2179 : 109 : }
2180 : :
2181 : : /*
2182 : : * Checks if recovery has reached a consistent state. When consistency is
2183 : : * reached and we have a valid starting standby snapshot, tell postmaster
2184 : : * that it can start accepting read-only connections.
2185 : : */
2186 : : static void
1349 heikki.linnakangas@i 2187 : 2739855 : CheckRecoveryConsistency(void)
2188 : : {
2189 : : XLogRecPtr lastReplayedEndRecPtr;
2190 : : TimeLineID lastReplayedTLI;
2191 : :
2192 : : /*
2193 : : * During crash recovery, we don't reach a consistent state until we've
2194 : : * replayed all the WAL.
2195 : : */
2196 [ + + ]: 2739855 : if (XLogRecPtrIsInvalid(minRecoveryPoint))
2197 : 257449 : return;
2198 : :
2199 [ - + ]: 2482406 : Assert(InArchiveRecovery);
2200 : :
2201 : : /*
2202 : : * assume that we are called in the startup process, and hence don't need
2203 : : * a lock to read lastReplayedEndRecPtr
2204 : : */
2205 : 2482406 : lastReplayedEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
2206 : 2482406 : lastReplayedTLI = XLogRecoveryCtl->lastReplayedTLI;
2207 : :
2208 : : /*
2209 : : * Have we reached the point where our base backup was completed?
2210 : : */
2211 [ + + ]: 2482406 : if (!XLogRecPtrIsInvalid(backupEndPoint) &&
2212 [ + + ]: 99 : backupEndPoint <= lastReplayedEndRecPtr)
2213 : : {
641 michael@paquier.xyz 2214 : 70 : XLogRecPtr saveBackupStartPoint = backupStartPoint;
2215 : 70 : XLogRecPtr saveBackupEndPoint = backupEndPoint;
2216 : :
1349 heikki.linnakangas@i 2217 [ + + ]: 70 : elog(DEBUG1, "end of backup reached");
2218 : :
2219 : : /*
2220 : : * We have reached the end of base backup, as indicated by pg_control.
2221 : : * Update the control file accordingly.
2222 : : */
2223 : 70 : ReachedEndOfBackup(lastReplayedEndRecPtr, lastReplayedTLI);
2224 : 70 : backupStartPoint = InvalidXLogRecPtr;
2225 : 70 : backupEndPoint = InvalidXLogRecPtr;
2226 : 70 : backupEndRequired = false;
2227 : :
641 michael@paquier.xyz 2228 [ + - ]: 70 : ereport(LOG,
2229 : : errmsg("completed backup recovery with redo LSN %X/%08X and end LSN %X/%08X",
2230 : : LSN_FORMAT_ARGS(saveBackupStartPoint),
2231 : : LSN_FORMAT_ARGS(saveBackupEndPoint)));
2232 : : }
2233 : :
2234 : : /*
2235 : : * Have we passed our safe starting point? Note that minRecoveryPoint is
2236 : : * known to be incorrectly set if recovering from a backup, until the
2237 : : * XLOG_BACKUP_END arrives to advise us of the correct minRecoveryPoint.
2238 : : * All we know prior to that is that we're not consistent yet.
2239 : : */
1349 heikki.linnakangas@i 2240 [ + + + + ]: 2482406 : if (!reachedConsistency && !backupEndRequired &&
2241 [ + + ]: 4884 : minRecoveryPoint <= lastReplayedEndRecPtr)
2242 : : {
2243 : : /*
2244 : : * Check to see if the XLOG sequence contained any unresolved
2245 : : * references to uninitialized pages.
2246 : : */
2247 : 109 : XLogCheckInvalidPages();
2248 : :
2249 : : /*
2250 : : * Check that pg_tblspc doesn't contain any real directories. Replay
2251 : : * of Database/CREATE_* records may have created fictitious tablespace
2252 : : * directories that should have been removed by the time consistency
2253 : : * was reached.
2254 : : */
1187 alvherre@alvh.no-ip. 2255 : 109 : CheckTablespaceDirectory();
2256 : :
1349 heikki.linnakangas@i 2257 : 109 : reachedConsistency = true;
208 fujii@postgresql.org 2258 : 109 : SendPostmasterSignal(PMSIGNAL_RECOVERY_CONSISTENT);
1349 heikki.linnakangas@i 2259 [ + - ]: 109 : ereport(LOG,
2260 : : errmsg("consistent recovery state reached at %X/%08X",
2261 : : LSN_FORMAT_ARGS(lastReplayedEndRecPtr)));
2262 : : }
2263 : :
2264 : : /*
2265 : : * Have we got a valid starting snapshot that will allow queries to be
2266 : : * run? If so, we can tell postmaster that the database is consistent now,
2267 : : * enabling connections.
2268 : : */
2269 [ + + ]: 2482406 : if (standbyState == STANDBY_SNAPSHOT_READY &&
2270 [ + + + + ]: 2482194 : !LocalHotStandbyActive &&
2271 [ + - ]: 101 : reachedConsistency &&
2272 : : IsUnderPostmaster)
2273 : : {
2274 [ - + ]: 101 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
2275 : 101 : XLogRecoveryCtl->SharedHotStandbyActive = true;
2276 : 101 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
2277 : :
2278 : 101 : LocalHotStandbyActive = true;
2279 : :
2280 : 101 : SendPostmasterSignal(PMSIGNAL_BEGIN_HOT_STANDBY);
2281 : : }
2282 : : }
2283 : :
2284 : : /*
2285 : : * Error context callback for errors occurring during rm_redo().
2286 : : */
2287 : : static void
2288 : 88 : rm_redo_error_callback(void *arg)
2289 : : {
2290 : 88 : XLogReaderState *record = (XLogReaderState *) arg;
2291 : : StringInfoData buf;
2292 : :
2293 : 88 : initStringInfo(&buf);
2294 : 88 : xlog_outdesc(&buf, record);
2295 : 88 : xlog_block_info(&buf, record);
2296 : :
2297 : : /* translator: %s is a WAL record description */
112 alvherre@kurilemu.de 2298 :GNC 88 : errcontext("WAL redo at %X/%08X for %s",
1349 heikki.linnakangas@i 2299 :CBC 88 : LSN_FORMAT_ARGS(record->ReadRecPtr),
2300 : : buf.data);
2301 : :
2302 : 88 : pfree(buf.data);
2303 : 88 : }
2304 : :
2305 : : /*
2306 : : * Returns a string describing an XLogRecord, consisting of its identity
2307 : : * optionally followed by a colon, a space, and a further description.
2308 : : */
2309 : : void
2310 : 88 : xlog_outdesc(StringInfo buf, XLogReaderState *record)
2311 : : {
1300 jdavis@postgresql.or 2312 : 88 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
1349 heikki.linnakangas@i 2313 : 88 : uint8 info = XLogRecGetInfo(record);
2314 : : const char *id;
2315 : :
1300 jdavis@postgresql.or 2316 : 88 : appendStringInfoString(buf, rmgr.rm_name);
1349 heikki.linnakangas@i 2317 : 88 : appendStringInfoChar(buf, '/');
2318 : :
1300 jdavis@postgresql.or 2319 : 88 : id = rmgr.rm_identify(info);
1349 heikki.linnakangas@i 2320 [ - + ]: 88 : if (id == NULL)
1349 heikki.linnakangas@i 2321 :UBC 0 : appendStringInfo(buf, "UNKNOWN (%X): ", info & ~XLR_INFO_MASK);
2322 : : else
1349 heikki.linnakangas@i 2323 :CBC 88 : appendStringInfo(buf, "%s: ", id);
2324 : :
1300 jdavis@postgresql.or 2325 : 88 : rmgr.rm_desc(buf, record);
1349 heikki.linnakangas@i 2326 : 88 : }
2327 : :
2328 : : #ifdef WAL_DEBUG
2329 : :
2330 : : static void
2331 : : xlog_outrec(StringInfo buf, XLogReaderState *record)
2332 : : {
2333 : : appendStringInfo(buf, "prev %X/%08X; xid %u",
2334 : : LSN_FORMAT_ARGS(XLogRecGetPrev(record)),
2335 : : XLogRecGetXid(record));
2336 : :
2337 : : appendStringInfo(buf, "; len %u",
2338 : : XLogRecGetDataLen(record));
2339 : :
2340 : : xlog_block_info(buf, record);
2341 : : }
2342 : : #endif /* WAL_DEBUG */
2343 : :
2344 : : /*
2345 : : * Returns a string giving information about all the blocks in an
2346 : : * XLogRecord.
2347 : : */
2348 : : static void
2349 : 88 : xlog_block_info(StringInfo buf, XLogReaderState *record)
2350 : : {
2351 : : int block_id;
2352 : :
2353 : : /* decode block references */
1319 tmunro@postgresql.or 2354 [ + + ]: 123 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2355 : : {
2356 : : RelFileLocator rlocator;
2357 : : ForkNumber forknum;
2358 : : BlockNumber blk;
2359 : :
1295 tgl@sss.pgh.pa.us 2360 [ - + ]: 35 : if (!XLogRecGetBlockTagExtended(record, block_id,
2361 : : &rlocator, &forknum, &blk, NULL))
1349 heikki.linnakangas@i 2362 :LBC (1) : continue;
2363 : :
1349 heikki.linnakangas@i 2364 [ + + ]:CBC 35 : if (forknum != MAIN_FORKNUM)
1125 rhaas@postgresql.org 2365 : 7 : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, fork %u, blk %u",
2366 : : block_id,
2367 : : rlocator.spcOid, rlocator.dbOid,
2368 : : rlocator.relNumber,
2369 : : forknum,
2370 : : blk);
2371 : : else
2372 : 28 : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, blk %u",
2373 : : block_id,
2374 : : rlocator.spcOid, rlocator.dbOid,
2375 : : rlocator.relNumber,
2376 : : blk);
1349 heikki.linnakangas@i 2377 [ + + ]: 35 : if (XLogRecHasBlockImage(record, block_id))
2378 : 28 : appendStringInfoString(buf, " FPW");
2379 : : }
2380 : 88 : }
2381 : :
2382 : :
2383 : : /*
2384 : : * Check that it's OK to switch to new timeline during recovery.
2385 : : *
2386 : : * 'lsn' is the address of the shutdown checkpoint record we're about to
2387 : : * replay. (Currently, timeline can only change at a shutdown checkpoint).
2388 : : */
2389 : : static void
2390 : 10 : checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI, TimeLineID prevTLI,
2391 : : TimeLineID replayTLI)
2392 : : {
2393 : : /* Check that the record agrees on what the current (old) timeline is */
2394 [ - + ]: 10 : if (prevTLI != replayTLI)
1349 heikki.linnakangas@i 2395 [ # # ]:UBC 0 : ereport(PANIC,
2396 : : (errmsg("unexpected previous timeline ID %u (current timeline ID %u) in checkpoint record",
2397 : : prevTLI, replayTLI)));
2398 : :
2399 : : /*
2400 : : * The new timeline better be in the list of timelines we expect to see,
2401 : : * according to the timeline history. It should also not decrease.
2402 : : */
1349 heikki.linnakangas@i 2403 [ + - - + ]:CBC 10 : if (newTLI < replayTLI || !tliInHistory(newTLI, expectedTLEs))
1349 heikki.linnakangas@i 2404 [ # # ]:UBC 0 : ereport(PANIC,
2405 : : (errmsg("unexpected timeline ID %u (after %u) in checkpoint record",
2406 : : newTLI, replayTLI)));
2407 : :
2408 : : /*
2409 : : * If we have not yet reached min recovery point, and we're about to
2410 : : * switch to a timeline greater than the timeline of the min recovery
2411 : : * point: trouble. After switching to the new timeline, we could not
2412 : : * possibly visit the min recovery point on the correct timeline anymore.
2413 : : * This can happen if there is a newer timeline in the archive that
2414 : : * branched before the timeline the min recovery point is on, and you
2415 : : * attempt to do PITR to the new timeline.
2416 : : */
1349 heikki.linnakangas@i 2417 [ + + ]:CBC 10 : if (!XLogRecPtrIsInvalid(minRecoveryPoint) &&
2418 [ + + ]: 9 : lsn < minRecoveryPoint &&
2419 [ - + ]: 1 : newTLI > minRecoveryPointTLI)
1349 heikki.linnakangas@i 2420 [ # # ]:UBC 0 : ereport(PANIC,
2421 : : errmsg("unexpected timeline ID %u in checkpoint record, before reaching minimum recovery point %X/%08X on timeline %u",
2422 : : newTLI,
2423 : : LSN_FORMAT_ARGS(minRecoveryPoint),
2424 : : minRecoveryPointTLI));
2425 : :
2426 : : /* Looks good */
1349 heikki.linnakangas@i 2427 :CBC 10 : }
2428 : :
2429 : :
2430 : : /*
2431 : : * Extract timestamp from WAL record.
2432 : : *
2433 : : * If the record contains a timestamp, returns true, and saves the timestamp
2434 : : * in *recordXtime. If the record type has no timestamp, returns false.
2435 : : * Currently, only transaction commit/abort records and restore points contain
2436 : : * timestamps.
2437 : : */
2438 : : static bool
2439 : 42762 : getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime)
2440 : : {
2441 : 42762 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2442 : 42762 : uint8 xact_info = info & XLOG_XACT_OPMASK;
2443 : 42762 : uint8 rmid = XLogRecGetRmid(record);
2444 : :
2445 [ + + + - ]: 42762 : if (rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2446 : : {
2447 : 2 : *recordXtime = ((xl_restore_point *) XLogRecGetData(record))->rp_time;
2448 : 2 : return true;
2449 : : }
2450 [ + - + + : 42760 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_COMMIT ||
+ + ]
2451 : : xact_info == XLOG_XACT_COMMIT_PREPARED))
2452 : : {
2453 : 39200 : *recordXtime = ((xl_xact_commit *) XLogRecGetData(record))->xact_time;
2454 : 39200 : return true;
2455 : : }
2456 [ + - + + : 3560 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_ABORT ||
+ - ]
2457 : : xact_info == XLOG_XACT_ABORT_PREPARED))
2458 : : {
2459 : 3560 : *recordXtime = ((xl_xact_abort *) XLogRecGetData(record))->xact_time;
2460 : 3560 : return true;
2461 : : }
1349 heikki.linnakangas@i 2462 :UBC 0 : return false;
2463 : : }
2464 : :
2465 : : /*
2466 : : * Checks whether the current buffer page and backup page stored in the
2467 : : * WAL record are consistent or not. Before comparing the two pages, a
2468 : : * masking can be applied to the pages to ignore certain areas like hint bits,
2469 : : * unused space between pd_lower and pd_upper among other things. This
2470 : : * function should be called once WAL replay has been completed for a
2471 : : * given record.
2472 : : */
2473 : : static void
1349 heikki.linnakangas@i 2474 :CBC 2166977 : verifyBackupPageConsistency(XLogReaderState *record)
2475 : : {
1300 jdavis@postgresql.or 2476 : 2166977 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
2477 : : RelFileLocator rlocator;
2478 : : ForkNumber forknum;
2479 : : BlockNumber blkno;
2480 : : int block_id;
2481 : :
2482 : : /* Records with no backup blocks have no need for consistency checks. */
1349 heikki.linnakangas@i 2483 [ + + ]: 2166977 : if (!XLogRecHasAnyBlockRefs(record))
2484 : 71 : return;
2485 : :
2486 [ - + ]: 2166906 : Assert((XLogRecGetInfo(record) & XLR_CHECK_CONSISTENCY) != 0);
2487 : :
1319 tmunro@postgresql.or 2488 [ + + ]: 4501857 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2489 : : {
2490 : : Buffer buf;
2491 : : Page page;
2492 : :
1295 tgl@sss.pgh.pa.us 2493 [ + + ]: 2334951 : if (!XLogRecGetBlockTagExtended(record, block_id,
2494 : : &rlocator, &forknum, &blkno, NULL))
2495 : : {
2496 : : /*
2497 : : * WAL record doesn't contain a block reference with the given id.
2498 : : * Do nothing.
2499 : : */
1349 heikki.linnakangas@i 2500 : 2020 : continue;
2501 : : }
2502 : :
2503 [ - + ]: 2332931 : Assert(XLogRecHasBlockImage(record, block_id));
2504 : :
2505 [ + + ]: 2332931 : if (XLogRecBlockImageApply(record, block_id))
2506 : : {
2507 : : /*
2508 : : * WAL record has already applied the page, so bypass the
2509 : : * consistency check as that would result in comparing the full
2510 : : * page stored in the record with itself.
2511 : : */
2512 : 25481 : continue;
2513 : : }
2514 : :
2515 : : /*
2516 : : * Read the contents from the current buffer and store it in a
2517 : : * temporary page.
2518 : : */
1209 rhaas@postgresql.org 2519 : 2307450 : buf = XLogReadBufferExtended(rlocator, forknum, blkno,
2520 : : RBM_NORMAL_NO_LOG,
2521 : : InvalidBuffer);
1349 heikki.linnakangas@i 2522 [ - + ]: 2307450 : if (!BufferIsValid(buf))
1349 heikki.linnakangas@i 2523 :UBC 0 : continue;
2524 : :
1349 heikki.linnakangas@i 2525 :CBC 2307450 : LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
2526 : 2307450 : page = BufferGetPage(buf);
2527 : :
2528 : : /*
2529 : : * Take a copy of the local page where WAL has been applied to have a
2530 : : * comparison base before masking it...
2531 : : */
2532 : 2307450 : memcpy(replay_image_masked, page, BLCKSZ);
2533 : :
2534 : : /* No need for this page anymore now that a copy is in. */
2535 : 2307450 : UnlockReleaseBuffer(buf);
2536 : :
2537 : : /*
2538 : : * If the block LSN is already ahead of this WAL record, we can't
2539 : : * expect contents to match. This can happen if recovery is
2540 : : * restarted.
2541 : : */
2542 [ - + ]: 2307450 : if (PageGetLSN(replay_image_masked) > record->EndRecPtr)
1349 heikki.linnakangas@i 2543 :UBC 0 : continue;
2544 : :
2545 : : /*
2546 : : * Read the contents from the backup copy, stored in WAL record and
2547 : : * store it in a temporary page. There is no need to allocate a new
2548 : : * page here, a local buffer is fine to hold its contents and a mask
2549 : : * can be directly applied on it.
2550 : : */
1349 heikki.linnakangas@i 2551 [ - + ]:CBC 2307450 : if (!RestoreBlockImage(record, block_id, primary_image_masked))
1144 michael@paquier.xyz 2552 [ # # ]:UBC 0 : ereport(ERROR,
2553 : : (errcode(ERRCODE_INTERNAL_ERROR),
2554 : : errmsg_internal("%s", record->errormsg_buf)));
2555 : :
2556 : : /*
2557 : : * If masking function is defined, mask both the primary and replay
2558 : : * images
2559 : : */
1300 jdavis@postgresql.or 2560 [ + - ]:CBC 2307450 : if (rmgr.rm_mask != NULL)
2561 : : {
2562 : 2307450 : rmgr.rm_mask(replay_image_masked, blkno);
2563 : 2307450 : rmgr.rm_mask(primary_image_masked, blkno);
2564 : : }
2565 : :
2566 : : /* Time to compare the primary and replay images. */
1349 heikki.linnakangas@i 2567 [ - + ]: 2307450 : if (memcmp(replay_image_masked, primary_image_masked, BLCKSZ) != 0)
2568 : : {
1349 heikki.linnakangas@i 2569 [ # # ]:UBC 0 : elog(FATAL,
2570 : : "inconsistent page found, rel %u/%u/%u, forknum %u, blkno %u",
2571 : : rlocator.spcOid, rlocator.dbOid, rlocator.relNumber,
2572 : : forknum, blkno);
2573 : : }
2574 : : }
2575 : : }
2576 : :
2577 : : /*
2578 : : * For point-in-time recovery, this function decides whether we want to
2579 : : * stop applying the XLOG before the current record.
2580 : : *
2581 : : * Returns true if we are stopping, false otherwise. If stopping, some
2582 : : * information is saved in recoveryStopXid et al for use in annotating the
2583 : : * new timeline's history file.
2584 : : */
2585 : : static bool
1349 heikki.linnakangas@i 2586 :CBC 2739652 : recoveryStopsBefore(XLogReaderState *record)
2587 : : {
2588 : 2739652 : bool stopsHere = false;
2589 : : uint8 xact_info;
2590 : : bool isCommit;
2591 : 2739652 : TimestampTz recordXtime = 0;
2592 : : TransactionId recordXid;
2593 : :
2594 : : /*
2595 : : * Ignore recovery target settings when not in archive recovery (meaning
2596 : : * we are in crash recovery).
2597 : : */
2598 [ + + ]: 2739652 : if (!ArchiveRecoveryRequested)
2599 : 243192 : return false;
2600 : :
2601 : : /* Check if we should stop as soon as reaching consistency */
2602 [ - + - - ]: 2496460 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2603 : : {
1349 heikki.linnakangas@i 2604 [ # # ]:UBC 0 : ereport(LOG,
2605 : : (errmsg("recovery stopping after reaching consistency")));
2606 : :
2607 : 0 : recoveryStopAfter = false;
2608 : 0 : recoveryStopXid = InvalidTransactionId;
2609 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2610 : 0 : recoveryStopTime = 0;
2611 : 0 : recoveryStopName[0] = '\0';
2612 : 0 : return true;
2613 : : }
2614 : :
2615 : : /* Check if target LSN has been reached */
1349 heikki.linnakangas@i 2616 [ + + ]:CBC 2496460 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2617 [ + + ]: 8472 : !recoveryTargetInclusive &&
2618 [ + + ]: 420 : record->ReadRecPtr >= recoveryTargetLSN)
2619 : : {
2620 : 2 : recoveryStopAfter = false;
2621 : 2 : recoveryStopXid = InvalidTransactionId;
2622 : 2 : recoveryStopLSN = record->ReadRecPtr;
2623 : 2 : recoveryStopTime = 0;
2624 : 2 : recoveryStopName[0] = '\0';
2625 [ + - ]: 2 : ereport(LOG,
2626 : : errmsg("recovery stopping before WAL location (LSN) \"%X/%08X\"",
2627 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2628 : 2 : return true;
2629 : : }
2630 : :
2631 : : /* Otherwise we only consider stopping before COMMIT or ABORT records. */
2632 [ + + ]: 2496458 : if (XLogRecGetRmid(record) != RM_XACT_ID)
2633 : 2474943 : return false;
2634 : :
2635 : 21515 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
2636 : :
2637 [ + + ]: 21515 : if (xact_info == XLOG_XACT_COMMIT)
2638 : : {
2639 : 19577 : isCommit = true;
2640 : 19577 : recordXid = XLogRecGetXid(record);
2641 : : }
2642 [ + + ]: 1938 : else if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2643 : : {
2644 : 24 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2645 : : xl_xact_parsed_commit parsed;
2646 : :
2647 : 24 : isCommit = true;
2648 : 24 : ParseCommitRecord(XLogRecGetInfo(record),
2649 : : xlrec,
2650 : : &parsed);
2651 : 24 : recordXid = parsed.twophase_xid;
2652 : : }
2653 [ + + ]: 1914 : else if (xact_info == XLOG_XACT_ABORT)
2654 : : {
2655 : 1769 : isCommit = false;
2656 : 1769 : recordXid = XLogRecGetXid(record);
2657 : : }
2658 [ + + ]: 145 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2659 : : {
2660 : 11 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2661 : : xl_xact_parsed_abort parsed;
2662 : :
2663 : 11 : isCommit = false;
2664 : 11 : ParseAbortRecord(XLogRecGetInfo(record),
2665 : : xlrec,
2666 : : &parsed);
2667 : 11 : recordXid = parsed.twophase_xid;
2668 : : }
2669 : : else
2670 : 134 : return false;
2671 : :
2672 [ - + - - ]: 21381 : if (recoveryTarget == RECOVERY_TARGET_XID && !recoveryTargetInclusive)
2673 : : {
2674 : : /*
2675 : : * There can be only one transaction end record with this exact
2676 : : * transactionid
2677 : : *
2678 : : * when testing for an xid, we MUST test for equality only, since
2679 : : * transactions are numbered in the order they start, not the order
2680 : : * they complete. A higher numbered xid will complete before you about
2681 : : * 50% of the time...
2682 : : */
1349 heikki.linnakangas@i 2683 :UBC 0 : stopsHere = (recordXid == recoveryTargetXid);
2684 : : }
2685 : :
2686 : : /*
2687 : : * Note: we must fetch recordXtime regardless of recoveryTarget setting.
2688 : : * We don't expect getRecordTimestamp ever to fail, since we already know
2689 : : * this is a commit or abort record; but test its result anyway.
2690 : : */
1012 tgl@sss.pgh.pa.us 2691 [ + - ]:CBC 21381 : if (getRecordTimestamp(record, &recordXtime) &&
2692 [ - + ]: 21381 : recoveryTarget == RECOVERY_TARGET_TIME)
2693 : : {
2694 : : /*
2695 : : * There can be many transactions that share the same commit time, so
2696 : : * we stop after the last one, if we are inclusive, or stop at the
2697 : : * first one if we are exclusive
2698 : : */
1349 heikki.linnakangas@i 2699 [ # # ]:UBC 0 : if (recoveryTargetInclusive)
2700 : 0 : stopsHere = (recordXtime > recoveryTargetTime);
2701 : : else
2702 : 0 : stopsHere = (recordXtime >= recoveryTargetTime);
2703 : : }
2704 : :
1349 heikki.linnakangas@i 2705 [ - + ]:CBC 21381 : if (stopsHere)
2706 : : {
1349 heikki.linnakangas@i 2707 :UBC 0 : recoveryStopAfter = false;
2708 : 0 : recoveryStopXid = recordXid;
2709 : 0 : recoveryStopTime = recordXtime;
2710 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2711 : 0 : recoveryStopName[0] = '\0';
2712 : :
2713 [ # # ]: 0 : if (isCommit)
2714 : : {
2715 [ # # ]: 0 : ereport(LOG,
2716 : : (errmsg("recovery stopping before commit of transaction %u, time %s",
2717 : : recoveryStopXid,
2718 : : timestamptz_to_str(recoveryStopTime))));
2719 : : }
2720 : : else
2721 : : {
2722 [ # # ]: 0 : ereport(LOG,
2723 : : (errmsg("recovery stopping before abort of transaction %u, time %s",
2724 : : recoveryStopXid,
2725 : : timestamptz_to_str(recoveryStopTime))));
2726 : : }
2727 : : }
2728 : :
1349 heikki.linnakangas@i 2729 :CBC 21381 : return stopsHere;
2730 : : }
2731 : :
2732 : : /*
2733 : : * Same as recoveryStopsBefore, but called after applying the record.
2734 : : *
2735 : : * We also track the timestamp of the latest applied COMMIT/ABORT
2736 : : * record in XLogRecoveryCtl->recoveryLastXTime.
2737 : : */
2738 : : static bool
2739 : 2739648 : recoveryStopsAfter(XLogReaderState *record)
2740 : : {
2741 : : uint8 info;
2742 : : uint8 xact_info;
2743 : : uint8 rmid;
874 2744 : 2739648 : TimestampTz recordXtime = 0;
2745 : :
2746 : : /*
2747 : : * Ignore recovery target settings when not in archive recovery (meaning
2748 : : * we are in crash recovery).
2749 : : */
1349 2750 [ + + ]: 2739648 : if (!ArchiveRecoveryRequested)
2751 : 243192 : return false;
2752 : :
2753 : 2496456 : info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2754 : 2496456 : rmid = XLogRecGetRmid(record);
2755 : :
2756 : : /*
2757 : : * There can be many restore points that share the same name; we stop at
2758 : : * the first one.
2759 : : */
2760 [ + + + + ]: 2496456 : if (recoveryTarget == RECOVERY_TARGET_NAME &&
2761 [ + + ]: 20 : rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2762 : : {
2763 : : xl_restore_point *recordRestorePointData;
2764 : :
2765 : 3 : recordRestorePointData = (xl_restore_point *) XLogRecGetData(record);
2766 : :
2767 [ + + ]: 3 : if (strcmp(recordRestorePointData->rp_name, recoveryTargetName) == 0)
2768 : : {
2769 : 2 : recoveryStopAfter = true;
2770 : 2 : recoveryStopXid = InvalidTransactionId;
2771 : 2 : recoveryStopLSN = InvalidXLogRecPtr;
2772 : 2 : (void) getRecordTimestamp(record, &recoveryStopTime);
2773 : 2 : strlcpy(recoveryStopName, recordRestorePointData->rp_name, MAXFNAMELEN);
2774 : :
2775 [ + - ]: 2 : ereport(LOG,
2776 : : (errmsg("recovery stopping at restore point \"%s\", time %s",
2777 : : recoveryStopName,
2778 : : timestamptz_to_str(recoveryStopTime))));
2779 : 2 : return true;
2780 : : }
2781 : : }
2782 : :
2783 : : /* Check if the target LSN has been reached */
2784 [ + + + + ]: 2496454 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2785 : 8052 : recoveryTargetInclusive &&
2786 [ + + ]: 8052 : record->ReadRecPtr >= recoveryTargetLSN)
2787 : : {
2788 : 3 : recoveryStopAfter = true;
2789 : 3 : recoveryStopXid = InvalidTransactionId;
2790 : 3 : recoveryStopLSN = record->ReadRecPtr;
2791 : 3 : recoveryStopTime = 0;
2792 : 3 : recoveryStopName[0] = '\0';
2793 [ + - ]: 3 : ereport(LOG,
2794 : : errmsg("recovery stopping after WAL location (LSN) \"%X/%08X\"",
2795 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2796 : 3 : return true;
2797 : : }
2798 : :
2799 [ + + ]: 2496451 : if (rmid != RM_XACT_ID)
2800 : 2474938 : return false;
2801 : :
2802 : 21513 : xact_info = info & XLOG_XACT_OPMASK;
2803 : :
2804 [ + + + + ]: 21513 : if (xact_info == XLOG_XACT_COMMIT ||
2805 [ + + ]: 1914 : xact_info == XLOG_XACT_COMMIT_PREPARED ||
2806 [ + + ]: 145 : xact_info == XLOG_XACT_ABORT ||
2807 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2808 : : {
2809 : : TransactionId recordXid;
2810 : :
2811 : : /* Update the last applied transaction timestamp */
2812 [ + - ]: 21379 : if (getRecordTimestamp(record, &recordXtime))
2813 : 21379 : SetLatestXTime(recordXtime);
2814 : :
2815 : : /* Extract the XID of the committed/aborted transaction */
2816 [ + + ]: 21379 : if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2817 : : {
2818 : 24 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2819 : : xl_xact_parsed_commit parsed;
2820 : :
2821 : 24 : ParseCommitRecord(XLogRecGetInfo(record),
2822 : : xlrec,
2823 : : &parsed);
2824 : 24 : recordXid = parsed.twophase_xid;
2825 : : }
2826 [ + + ]: 21355 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2827 : : {
2828 : 11 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2829 : : xl_xact_parsed_abort parsed;
2830 : :
2831 : 11 : ParseAbortRecord(XLogRecGetInfo(record),
2832 : : xlrec,
2833 : : &parsed);
2834 : 11 : recordXid = parsed.twophase_xid;
2835 : : }
2836 : : else
2837 : 21344 : recordXid = XLogRecGetXid(record);
2838 : :
2839 : : /*
2840 : : * There can be only one transaction end record with this exact
2841 : : * transactionid
2842 : : *
2843 : : * when testing for an xid, we MUST test for equality only, since
2844 : : * transactions are numbered in the order they start, not the order
2845 : : * they complete. A higher numbered xid will complete before you about
2846 : : * 50% of the time...
2847 : : */
2848 [ - + - - ]: 21379 : if (recoveryTarget == RECOVERY_TARGET_XID && recoveryTargetInclusive &&
1349 heikki.linnakangas@i 2849 [ # # ]:UBC 0 : recordXid == recoveryTargetXid)
2850 : : {
2851 : 0 : recoveryStopAfter = true;
2852 : 0 : recoveryStopXid = recordXid;
2853 : 0 : recoveryStopTime = recordXtime;
2854 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2855 : 0 : recoveryStopName[0] = '\0';
2856 : :
2857 [ # # # # ]: 0 : if (xact_info == XLOG_XACT_COMMIT ||
2858 : : xact_info == XLOG_XACT_COMMIT_PREPARED)
2859 : : {
2860 [ # # ]: 0 : ereport(LOG,
2861 : : (errmsg("recovery stopping after commit of transaction %u, time %s",
2862 : : recoveryStopXid,
2863 : : timestamptz_to_str(recoveryStopTime))));
2864 : : }
2865 [ # # # # ]: 0 : else if (xact_info == XLOG_XACT_ABORT ||
2866 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2867 : : {
2868 [ # # ]: 0 : ereport(LOG,
2869 : : (errmsg("recovery stopping after abort of transaction %u, time %s",
2870 : : recoveryStopXid,
2871 : : timestamptz_to_str(recoveryStopTime))));
2872 : : }
2873 : 0 : return true;
2874 : : }
2875 : : }
2876 : :
2877 : : /* Check if we should stop as soon as reaching consistency */
1349 heikki.linnakangas@i 2878 [ - + - - ]:CBC 21513 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2879 : : {
1349 heikki.linnakangas@i 2880 [ # # ]:UBC 0 : ereport(LOG,
2881 : : (errmsg("recovery stopping after reaching consistency")));
2882 : :
2883 : 0 : recoveryStopAfter = true;
2884 : 0 : recoveryStopXid = InvalidTransactionId;
2885 : 0 : recoveryStopTime = 0;
2886 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2887 : 0 : recoveryStopName[0] = '\0';
2888 : 0 : return true;
2889 : : }
2890 : :
1349 heikki.linnakangas@i 2891 :CBC 21513 : return false;
2892 : : }
2893 : :
2894 : : /*
2895 : : * Create a comment for the history file to explain why and where
2896 : : * timeline changed.
2897 : : */
2898 : : static char *
2899 : 852 : getRecoveryStopReason(void)
2900 : : {
2901 : : char reason[200];
2902 : :
2903 [ - + ]: 852 : if (recoveryTarget == RECOVERY_TARGET_XID)
1349 heikki.linnakangas@i 2904 :UBC 0 : snprintf(reason, sizeof(reason),
2905 : : "%s transaction %u",
2906 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2907 : : recoveryStopXid);
1349 heikki.linnakangas@i 2908 [ - + ]:CBC 852 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
1349 heikki.linnakangas@i 2909 :UBC 0 : snprintf(reason, sizeof(reason),
2910 : : "%s %s\n",
2911 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2912 : : timestamptz_to_str(recoveryStopTime));
1349 heikki.linnakangas@i 2913 [ + + ]:CBC 852 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
2914 : 7 : snprintf(reason, sizeof(reason),
2915 : : "%s LSN %X/%08X\n",
2916 : 7 : recoveryStopAfter ? "after" : "before",
2917 [ + + ]: 7 : LSN_FORMAT_ARGS(recoveryStopLSN));
2918 [ + + ]: 845 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
2919 : 3 : snprintf(reason, sizeof(reason),
2920 : : "at restore point \"%s\"",
2921 : : recoveryStopName);
2922 [ - + ]: 842 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
1349 heikki.linnakangas@i 2923 :UBC 0 : snprintf(reason, sizeof(reason), "reached consistency");
2924 : : else
1349 heikki.linnakangas@i 2925 :CBC 842 : snprintf(reason, sizeof(reason), "no recovery target specified");
2926 : :
2927 : 852 : return pstrdup(reason);
2928 : : }
2929 : :
2930 : : /*
2931 : : * Wait until shared recoveryPauseState is set to RECOVERY_NOT_PAUSED.
2932 : : *
2933 : : * endOfRecovery is true if the recovery target is reached and
2934 : : * the paused state starts at the end of recovery because of
2935 : : * recovery_target_action=pause, and false otherwise.
2936 : : */
2937 : : static void
2938 : 3 : recoveryPausesHere(bool endOfRecovery)
2939 : : {
2940 : : /* Don't pause unless users can connect! */
2941 [ - + ]: 3 : if (!LocalHotStandbyActive)
1349 heikki.linnakangas@i 2942 :UBC 0 : return;
2943 : :
2944 : : /* Don't pause after standby promotion has been triggered */
1349 heikki.linnakangas@i 2945 [ - + ]:CBC 3 : if (LocalPromoteIsTriggered)
1349 heikki.linnakangas@i 2946 :UBC 0 : return;
2947 : :
1349 heikki.linnakangas@i 2948 [ + + ]:CBC 3 : if (endOfRecovery)
2949 [ + - ]: 1 : ereport(LOG,
2950 : : (errmsg("pausing at the end of recovery"),
2951 : : errhint("Execute pg_wal_replay_resume() to promote.")));
2952 : : else
2953 [ + - ]: 2 : ereport(LOG,
2954 : : (errmsg("recovery has paused"),
2955 : : errhint("Execute pg_wal_replay_resume() to continue.")));
2956 : :
2957 : : /* loop until recoveryPauseState is set to RECOVERY_NOT_PAUSED */
2958 [ + + ]: 9 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
2959 : : {
236 2960 : 8 : ProcessStartupProcInterrupts();
1349 2961 [ + + ]: 8 : if (CheckForStandbyTrigger())
2962 : 2 : return;
2963 : :
2964 : : /*
2965 : : * If recovery pause is requested then set it paused. While we are in
2966 : : * the loop, user might resume and pause again so set this every time.
2967 : : */
2968 : 6 : ConfirmRecoveryPaused();
2969 : :
2970 : : /*
2971 : : * We wait on a condition variable that will wake us as soon as the
2972 : : * pause ends, but we use a timeout so we can check the above exit
2973 : : * condition periodically too.
2974 : : */
2975 : 6 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
2976 : : WAIT_EVENT_RECOVERY_PAUSE);
2977 : : }
2978 : 1 : ConditionVariableCancelSleep();
2979 : : }
2980 : :
2981 : : /*
2982 : : * When recovery_min_apply_delay is set, we wait long enough to make sure
2983 : : * certain record types are applied at least that interval behind the primary.
2984 : : *
2985 : : * Returns true if we waited.
2986 : : *
2987 : : * Note that the delay is calculated between the WAL record log time and
2988 : : * the current time on standby. We would prefer to keep track of when this
2989 : : * standby received each WAL record, which would allow a more consistent
2990 : : * approach and one not affected by time synchronisation issues, but that
2991 : : * is significantly more effort and complexity for little actual gain in
2992 : : * usability.
2993 : : */
2994 : : static bool
2995 : 2739650 : recoveryApplyDelay(XLogReaderState *record)
2996 : : {
2997 : : uint8 xact_info;
2998 : : TimestampTz xtime;
2999 : : TimestampTz delayUntil;
3000 : : long msecs;
3001 : :
3002 : : /* nothing to do if no delay configured */
3003 [ + - ]: 2739650 : if (recovery_min_apply_delay <= 0)
3004 : 2739650 : return false;
3005 : :
3006 : : /* no delay is applied on a database not yet consistent */
1349 heikki.linnakangas@i 3007 [ # # ]:UBC 0 : if (!reachedConsistency)
3008 : 0 : return false;
3009 : :
3010 : : /* nothing to do if crash recovery is requested */
3011 [ # # ]: 0 : if (!ArchiveRecoveryRequested)
3012 : 0 : return false;
3013 : :
3014 : : /*
3015 : : * Is it a COMMIT record?
3016 : : *
3017 : : * We deliberately choose not to delay aborts since they have no effect on
3018 : : * MVCC. We already allow replay of records that don't have a timestamp,
3019 : : * so there is already opportunity for issues caused by early conflicts on
3020 : : * standbys.
3021 : : */
3022 [ # # ]: 0 : if (XLogRecGetRmid(record) != RM_XACT_ID)
3023 : 0 : return false;
3024 : :
3025 : 0 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
3026 : :
3027 [ # # # # ]: 0 : if (xact_info != XLOG_XACT_COMMIT &&
3028 : : xact_info != XLOG_XACT_COMMIT_PREPARED)
3029 : 0 : return false;
3030 : :
3031 [ # # ]: 0 : if (!getRecordTimestamp(record, &xtime))
3032 : 0 : return false;
3033 : :
3034 : 0 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
3035 : :
3036 : : /*
3037 : : * Exit without arming the latch if it's already past time to apply this
3038 : : * record
3039 : : */
3040 : 0 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(), delayUntil);
3041 [ # # ]: 0 : if (msecs <= 0)
3042 : 0 : return false;
3043 : :
3044 : : while (true)
3045 : : {
3046 : 0 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3047 : :
3048 : : /* This might change recovery_min_apply_delay. */
236 3049 : 0 : ProcessStartupProcInterrupts();
3050 : :
1349 3051 [ # # ]: 0 : if (CheckForStandbyTrigger())
3052 : 0 : break;
3053 : :
3054 : : /*
3055 : : * Recalculate delayUntil as recovery_min_apply_delay could have
3056 : : * changed while waiting in this loop.
3057 : : */
3058 : 0 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
3059 : :
3060 : : /*
3061 : : * Wait for difference between GetCurrentTimestamp() and delayUntil.
3062 : : */
3063 : 0 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(),
3064 : : delayUntil);
3065 : :
3066 [ # # ]: 0 : if (msecs <= 0)
3067 : 0 : break;
3068 : :
3069 [ # # ]: 0 : elog(DEBUG2, "recovery apply delay %ld milliseconds", msecs);
3070 : :
3071 : 0 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3072 : : WL_LATCH_SET | WL_TIMEOUT | WL_EXIT_ON_PM_DEATH,
3073 : : msecs,
3074 : : WAIT_EVENT_RECOVERY_APPLY_DELAY);
3075 : : }
3076 : 0 : return true;
3077 : : }
3078 : :
3079 : : /*
3080 : : * Get the current state of the recovery pause request.
3081 : : */
3082 : : RecoveryPauseState
1349 heikki.linnakangas@i 3083 :CBC 14 : GetRecoveryPauseState(void)
3084 : : {
3085 : : RecoveryPauseState state;
3086 : :
3087 [ - + ]: 14 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3088 : 14 : state = XLogRecoveryCtl->recoveryPauseState;
3089 : 14 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3090 : :
3091 : 14 : return state;
3092 : : }
3093 : :
3094 : : /*
3095 : : * Set the recovery pause state.
3096 : : *
3097 : : * If recovery pause is requested then sets the recovery pause state to
3098 : : * 'pause requested' if it is not already 'paused'. Otherwise, sets it
3099 : : * to 'not paused' to resume the recovery. The recovery pause will be
3100 : : * confirmed by the ConfirmRecoveryPaused.
3101 : : */
3102 : : void
3103 : 45 : SetRecoveryPause(bool recoveryPause)
3104 : : {
3105 [ - + ]: 45 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3106 : :
3107 [ + + ]: 45 : if (!recoveryPause)
3108 : 42 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
3109 [ + - ]: 3 : else if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_NOT_PAUSED)
3110 : 3 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSE_REQUESTED;
3111 : :
3112 : 45 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3113 : :
3114 [ + + ]: 45 : if (!recoveryPause)
3115 : 42 : ConditionVariableBroadcast(&XLogRecoveryCtl->recoveryNotPausedCV);
3116 : 45 : }
3117 : :
3118 : : /*
3119 : : * Confirm the recovery pause by setting the recovery pause state to
3120 : : * RECOVERY_PAUSED.
3121 : : */
3122 : : static void
3123 : 6 : ConfirmRecoveryPaused(void)
3124 : : {
3125 : : /* If recovery pause is requested then set it paused */
3126 [ - + ]: 6 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3127 [ + + ]: 6 : if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_PAUSE_REQUESTED)
3128 : 3 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSED;
3129 : 6 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3130 : 6 : }
3131 : :
3132 : :
3133 : : /*
3134 : : * Attempt to read the next XLOG record.
3135 : : *
3136 : : * Before first call, the reader needs to be positioned to the first record
3137 : : * by calling XLogPrefetcherBeginRead().
3138 : : *
3139 : : * If no valid record is available, returns NULL, or fails if emode is PANIC.
3140 : : * (emode must be either PANIC, LOG). In standby mode, retries until a valid
3141 : : * record is available.
3142 : : */
3143 : : static XLogRecord *
1299 tmunro@postgresql.or 3144 : 2741677 : ReadRecord(XLogPrefetcher *xlogprefetcher, int emode,
3145 : : bool fetching_ckpt, TimeLineID replayTLI)
3146 : : {
3147 : : XLogRecord *record;
3148 : 2741677 : XLogReaderState *xlogreader = XLogPrefetcherGetReader(xlogprefetcher);
1349 heikki.linnakangas@i 3149 : 2741677 : XLogPageReadPrivate *private = (XLogPageReadPrivate *) xlogreader->private_data;
3150 : :
3151 : : /* Pass through parameters to XLogPageRead */
3152 : 2741677 : private->fetching_ckpt = fetching_ckpt;
3153 : 2741677 : private->emode = emode;
3154 : 2741677 : private->randAccess = (xlogreader->ReadRecPtr == InvalidXLogRecPtr);
3155 : 2741677 : private->replayTLI = replayTLI;
3156 : :
3157 : : /* This is the first attempt to read this page. */
3158 : 2741677 : lastSourceFailed = false;
3159 : :
3160 : : for (;;)
3161 : 102 : {
3162 : : char *errormsg;
3163 : :
1299 tmunro@postgresql.or 3164 : 2741779 : record = XLogPrefetcherReadRecord(xlogprefetcher, &errormsg);
1349 heikki.linnakangas@i 3165 [ + + ]: 2741727 : if (record == NULL)
3166 : : {
3167 : : /*
3168 : : * When we find that WAL ends in an incomplete record, keep track
3169 : : * of that record. After recovery is done, we'll write a record
3170 : : * to indicate to downstream WAL readers that that portion is to
3171 : : * be ignored.
3172 : : *
3173 : : * However, when ArchiveRecoveryRequested = true, we're going to
3174 : : * switch to a new timeline at the end of recovery. We will only
3175 : : * copy WAL over to the new timeline up to the end of the last
3176 : : * complete record, so if we did this, we would later create an
3177 : : * overwrite contrecord in the wrong place, breaking everything.
3178 : : */
1155 rhaas@postgresql.org 3179 [ + + ]: 246 : if (!ArchiveRecoveryRequested &&
1349 heikki.linnakangas@i 3180 [ + + ]: 102 : !XLogRecPtrIsInvalid(xlogreader->abortedRecPtr))
3181 : : {
3182 : 11 : abortedRecPtr = xlogreader->abortedRecPtr;
3183 : 11 : missingContrecPtr = xlogreader->missingContrecPtr;
3184 : : }
3185 : :
3186 [ + + ]: 246 : if (readFile >= 0)
3187 : : {
3188 : 228 : close(readFile);
3189 : 228 : readFile = -1;
3190 : : }
3191 : :
3192 : : /*
3193 : : * We only end up here without a message when XLogPageRead()
3194 : : * failed - in that case we already logged something. In
3195 : : * StandbyMode that only happens if we have been triggered, so we
3196 : : * shouldn't loop anymore in that case.
3197 : : */
3198 [ + + ]: 246 : if (errormsg)
3199 [ + + ]: 228 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3200 : : (errmsg_internal("%s", errormsg) /* already translated */ ));
3201 : : }
3202 : :
3203 : : /*
3204 : : * Check page TLI is one of the expected values.
3205 : : */
3206 [ - + ]: 2741481 : else if (!tliInHistory(xlogreader->latestPageTLI, expectedTLEs))
3207 : : {
3208 : : char fname[MAXFNAMELEN];
3209 : : XLogSegNo segno;
3210 : : int32 offset;
3211 : :
1349 heikki.linnakangas@i 3212 :UBC 0 : XLByteToSeg(xlogreader->latestPagePtr, segno, wal_segment_size);
3213 : 0 : offset = XLogSegmentOffset(xlogreader->latestPagePtr,
3214 : : wal_segment_size);
3215 : 0 : XLogFileName(fname, xlogreader->seg.ws_tli, segno,
3216 : : wal_segment_size);
3217 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3218 : : errmsg("unexpected timeline ID %u in WAL segment %s, LSN %X/%08X, offset %u",
3219 : : xlogreader->latestPageTLI,
3220 : : fname,
3221 : : LSN_FORMAT_ARGS(xlogreader->latestPagePtr),
3222 : : offset));
3223 : 0 : record = NULL;
3224 : : }
3225 : :
1349 heikki.linnakangas@i 3226 [ + + ]:CBC 2741727 : if (record)
3227 : : {
3228 : : /* Great, got a record */
3229 : 2741625 : return record;
3230 : : }
3231 : : else
3232 : : {
3233 : : /* No valid record available from this source */
3234 : 246 : lastSourceFailed = true;
3235 : :
3236 : : /*
3237 : : * If archive recovery was requested, but we were still doing
3238 : : * crash recovery, switch to archive recovery and retry using the
3239 : : * offline archive. We have now replayed all the valid WAL in
3240 : : * pg_wal, so we are presumably now consistent.
3241 : : *
3242 : : * We require that there's at least some valid WAL present in
3243 : : * pg_wal, however (!fetching_ckpt). We could recover using the
3244 : : * WAL from the archive, even if pg_wal is completely empty, but
3245 : : * we'd have no idea how far we'd have to replay to reach
3246 : : * consistency. So err on the safe side and give up.
3247 : : */
3248 [ + + + + ]: 246 : if (!InArchiveRecovery && ArchiveRecoveryRequested &&
3249 [ + - ]: 2 : !fetching_ckpt)
3250 : : {
3251 [ - + ]: 2 : ereport(DEBUG1,
3252 : : (errmsg_internal("reached end of WAL in pg_wal, entering archive recovery")));
3253 : 2 : InArchiveRecovery = true;
3254 [ + - ]: 2 : if (StandbyModeRequested)
994 rhaas@postgresql.org 3255 : 2 : EnableStandbyMode();
3256 : :
1349 heikki.linnakangas@i 3257 : 2 : SwitchIntoArchiveRecovery(xlogreader->EndRecPtr, replayTLI);
3258 : 2 : minRecoveryPoint = xlogreader->EndRecPtr;
3259 : 2 : minRecoveryPointTLI = replayTLI;
3260 : :
3261 : 2 : CheckRecoveryConsistency();
3262 : :
3263 : : /*
3264 : : * Before we retry, reset lastSourceFailed and currentSource
3265 : : * so that we will check the archive next.
3266 : : */
3267 : 2 : lastSourceFailed = false;
3268 : 2 : currentSource = XLOG_FROM_ANY;
3269 : :
3270 : 102 : continue;
3271 : : }
3272 : :
3273 : : /* In standby mode, loop back to retry. Otherwise, give up. */
3274 [ + + + + ]: 244 : if (StandbyMode && !CheckForStandbyTrigger())
3275 : 100 : continue;
3276 : : else
3277 : 144 : return NULL;
3278 : : }
3279 : : }
3280 : : }
3281 : :
3282 : : /*
3283 : : * Read the XLOG page containing targetPagePtr into readBuf (if not read
3284 : : * already). Returns number of bytes read, if the page is read successfully,
3285 : : * or XLREAD_FAIL in case of errors. When errors occur, they are ereport'ed,
3286 : : * but only if they have not been previously reported.
3287 : : *
3288 : : * See XLogReaderRoutine.page_read for more details.
3289 : : *
3290 : : * While prefetching, xlogreader->nonblocking may be set. In that case,
3291 : : * returns XLREAD_WOULDBLOCK if we'd otherwise have to wait for more WAL.
3292 : : *
3293 : : * This is responsible for restoring files from archive as needed, as well
3294 : : * as for waiting for the requested WAL record to arrive in standby mode.
3295 : : *
3296 : : * xlogreader->private_data->emode specifies the log level used for reporting
3297 : : * "file not found" or "end of WAL" situations in archive recovery, or in
3298 : : * standby mode when promotion is triggered. If set to WARNING or below,
3299 : : * XLogPageRead() returns XLREAD_FAIL in those situations, on higher log
3300 : : * levels the ereport() won't return.
3301 : : *
3302 : : * In standby mode, if after a successful return of XLogPageRead() the
3303 : : * caller finds the record it's interested in to be broken, it should
3304 : : * ereport the error with the level determined by
3305 : : * emode_for_corrupt_record(), and then set lastSourceFailed
3306 : : * and call XLogPageRead() again with the same arguments. This lets
3307 : : * XLogPageRead() to try fetching the record from another source, or to
3308 : : * sleep and retry.
3309 : : */
3310 : : static int
3311 : 1431280 : XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr, int reqLen,
3312 : : XLogRecPtr targetRecPtr, char *readBuf)
3313 : : {
3314 : 1431280 : XLogPageReadPrivate *private =
3315 : : (XLogPageReadPrivate *) xlogreader->private_data;
3316 : 1431280 : int emode = private->emode;
3317 : : uint32 targetPageOff;
3318 : : XLogSegNo targetSegNo PG_USED_FOR_ASSERTS_ONLY;
3319 : : int r;
3320 : : instr_time io_start;
3321 : :
3322 : 1431280 : XLByteToSeg(targetPagePtr, targetSegNo, wal_segment_size);
3323 : 1431280 : targetPageOff = XLogSegmentOffset(targetPagePtr, wal_segment_size);
3324 : :
3325 : : /*
3326 : : * See if we need to switch to a new segment because the requested record
3327 : : * is not in the currently open one.
3328 : : */
3329 [ + + ]: 1431280 : if (readFile >= 0 &&
3330 [ + + ]: 1429788 : !XLByteInSeg(targetPagePtr, readSegNo, wal_segment_size))
3331 : : {
3332 : : /*
3333 : : * Request a restartpoint if we've replayed too much xlog since the
3334 : : * last one.
3335 : : */
3336 [ + + + - ]: 1351 : if (ArchiveRecoveryRequested && IsUnderPostmaster)
3337 : : {
3338 [ + + ]: 1337 : if (XLogCheckpointNeeded(readSegNo))
3339 : : {
3340 : 1238 : (void) GetRedoRecPtr();
3341 [ + + ]: 1238 : if (XLogCheckpointNeeded(readSegNo))
3342 : 1231 : RequestCheckpoint(CHECKPOINT_CAUSE_XLOG);
3343 : : }
3344 : : }
3345 : :
3346 : 1351 : close(readFile);
3347 : 1351 : readFile = -1;
3348 : 1351 : readSource = XLOG_FROM_ANY;
3349 : : }
3350 : :
3351 : 1431280 : XLByteToSeg(targetPagePtr, readSegNo, wal_segment_size);
3352 : :
3353 : 1431282 : retry:
3354 : : /* See if we need to retrieve more data */
3355 [ + + ]: 1431282 : if (readFile < 0 ||
3356 [ + + ]: 1428437 : (readSource == XLOG_FROM_STREAM &&
3357 [ + + ]: 1417161 : flushedUpto < targetPagePtr + reqLen))
3358 : : {
1299 tmunro@postgresql.or 3359 [ + + ]: 25032 : if (readFile >= 0 &&
3360 [ + + ]: 22187 : xlogreader->nonblocking &&
3361 [ + - ]: 10985 : readSource == XLOG_FROM_STREAM &&
3362 [ + - ]: 10985 : flushedUpto < targetPagePtr + reqLen)
3363 : 10985 : return XLREAD_WOULDBLOCK;
3364 : :
3365 [ + + + - ]: 13995 : switch (WaitForWALToBecomeAvailable(targetPagePtr + reqLen,
3366 : 14047 : private->randAccess,
3367 : 14047 : private->fetching_ckpt,
3368 : : targetRecPtr,
3369 : : private->replayTLI,
3370 : : xlogreader->EndRecPtr,
3371 : 14047 : xlogreader->nonblocking))
3372 : : {
3373 : 324 : case XLREAD_WOULDBLOCK:
3374 : 324 : return XLREAD_WOULDBLOCK;
3375 : 34 : case XLREAD_FAIL:
3376 [ - + ]: 34 : if (readFile >= 0)
1299 tmunro@postgresql.or 3377 :UBC 0 : close(readFile);
1299 tmunro@postgresql.or 3378 :CBC 34 : readFile = -1;
3379 : 34 : readLen = 0;
3380 : 34 : readSource = XLOG_FROM_ANY;
3381 : 34 : return XLREAD_FAIL;
3382 : 13637 : case XLREAD_SUCCESS:
3383 : 13637 : break;
3384 : : }
3385 : : }
3386 : :
3387 : : /*
3388 : : * At this point, we have the right segment open and if we're streaming we
3389 : : * know the requested record is in it.
3390 : : */
1349 heikki.linnakangas@i 3391 [ - + ]: 1419887 : Assert(readFile != -1);
3392 : :
3393 : : /*
3394 : : * If the current segment is being streamed from the primary, calculate
3395 : : * how much of the current page we have received already. We know the
3396 : : * requested record has been received, but this is for the benefit of
3397 : : * future calls, to allow quick exit at the top of this function.
3398 : : */
3399 [ + + ]: 1419887 : if (readSource == XLOG_FROM_STREAM)
3400 : : {
3401 [ + + ]: 1407112 : if (((targetPagePtr) / XLOG_BLCKSZ) != (flushedUpto / XLOG_BLCKSZ))
3402 : 1398422 : readLen = XLOG_BLCKSZ;
3403 : : else
3404 : 8690 : readLen = XLogSegmentOffset(flushedUpto, wal_segment_size) -
3405 : : targetPageOff;
3406 : : }
3407 : : else
3408 : 12775 : readLen = XLOG_BLCKSZ;
3409 : :
3410 : : /* Read the requested page */
3411 : 1419887 : readOff = targetPageOff;
3412 : :
3413 : : /* Measure I/O timing when reading segment */
243 michael@paquier.xyz 3414 : 1419887 : io_start = pgstat_prepare_io_time(track_wal_io_timing);
3415 : :
1349 heikki.linnakangas@i 3416 : 1419887 : pgstat_report_wait_start(WAIT_EVENT_WAL_READ);
1124 tmunro@postgresql.or 3417 : 1419887 : r = pg_pread(readFile, readBuf, XLOG_BLCKSZ, (off_t) readOff);
1349 heikki.linnakangas@i 3418 [ - + ]: 1419887 : if (r != XLOG_BLCKSZ)
3419 : : {
3420 : : char fname[MAXFNAMELEN];
1349 heikki.linnakangas@i 3421 :UBC 0 : int save_errno = errno;
3422 : :
3423 : 0 : pgstat_report_wait_end();
3424 : :
265 michael@paquier.xyz 3425 : 0 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3426 : : io_start, 1, r);
3427 : :
1349 heikki.linnakangas@i 3428 : 0 : XLogFileName(fname, curFileTLI, readSegNo, wal_segment_size);
3429 [ # # ]: 0 : if (r < 0)
3430 : : {
3431 : 0 : errno = save_errno;
3432 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3433 : : (errcode_for_file_access(),
3434 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: %m",
3435 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3436 : : readOff)));
3437 : : }
3438 : : else
3439 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3440 : : (errcode(ERRCODE_DATA_CORRUPTED),
3441 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: read %d of %zu",
3442 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3443 : : readOff, r, (Size) XLOG_BLCKSZ)));
3444 : 0 : goto next_record_is_invalid;
3445 : : }
1349 heikki.linnakangas@i 3446 :CBC 1419887 : pgstat_report_wait_end();
3447 : :
265 michael@paquier.xyz 3448 : 1419887 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3449 : : io_start, 1, r);
3450 : :
1349 heikki.linnakangas@i 3451 [ - + ]: 1419887 : Assert(targetSegNo == readSegNo);
3452 [ - + ]: 1419887 : Assert(targetPageOff == readOff);
3453 [ - + ]: 1419887 : Assert(reqLen <= readLen);
3454 : :
3455 : 1419887 : xlogreader->seg.ws_tli = curFileTLI;
3456 : :
3457 : : /*
3458 : : * Check the page header immediately, so that we can retry immediately if
3459 : : * it's not valid. This may seem unnecessary, because ReadPageInternal()
3460 : : * validates the page header anyway, and would propagate the failure up to
3461 : : * ReadRecord(), which would retry. However, there's a corner case with
3462 : : * continuation records, if a record is split across two pages such that
3463 : : * we would need to read the two pages from different sources across two
3464 : : * WAL segments.
3465 : : *
3466 : : * The first page is only available locally, in pg_wal, because it's
3467 : : * already been recycled on the primary. The second page, however, is not
3468 : : * present in pg_wal, and we should stream it from the primary. There is a
3469 : : * recycled WAL segment present in pg_wal, with garbage contents, however.
3470 : : * We would read the first page from the local WAL segment, but when
3471 : : * reading the second page, we would read the bogus, recycled, WAL
3472 : : * segment. If we didn't catch that case here, we would never recover,
3473 : : * because ReadRecord() would retry reading the whole record from the
3474 : : * beginning.
3475 : : *
3476 : : * Of course, this only catches errors in the page header, which is what
3477 : : * happens in the case of a recycled WAL segment. Other kinds of errors or
3478 : : * corruption still has the same problem. But this at least fixes the
3479 : : * common case, which can happen as part of normal operation.
3480 : : *
3481 : : * Validating the page header is cheap enough that doing it twice
3482 : : * shouldn't be a big deal from a performance point of view.
3483 : : *
3484 : : * When not in standby mode, an invalid page header should cause recovery
3485 : : * to end, not retry reading the page, so we don't need to validate the
3486 : : * page header here for the retry. Instead, ReadPageInternal() is
3487 : : * responsible for the validation.
3488 : : */
3489 [ + + ]: 1419887 : if (StandbyMode &&
280 michael@paquier.xyz 3490 [ + + ]: 1410159 : (targetPagePtr % wal_segment_size) == 0 &&
1349 heikki.linnakangas@i 3491 [ + + ]: 1305 : !XLogReaderValidatePageHeader(xlogreader, targetPagePtr, readBuf))
3492 : : {
3493 : : /*
3494 : : * Emit this error right now then retry this page immediately. Use
3495 : : * errmsg_internal() because the message was already translated.
3496 : : */
3497 [ + - ]: 3 : if (xlogreader->errormsg_buf[0])
3498 [ + + ]: 3 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3499 : : (errmsg_internal("%s", xlogreader->errormsg_buf)));
3500 : :
3501 : : /* reset any error XLogReaderValidatePageHeader() might have set */
1150 tmunro@postgresql.or 3502 : 3 : XLogReaderResetError(xlogreader);
1349 heikki.linnakangas@i 3503 : 3 : goto next_record_is_invalid;
3504 : : }
3505 : :
3506 : 1419884 : return readLen;
3507 : :
3508 : 3 : next_record_is_invalid:
3509 : :
3510 : : /*
3511 : : * If we're reading ahead, give up fast. Retries and error reporting will
3512 : : * be handled by a later read when recovery catches up to this point.
3513 : : */
1150 tmunro@postgresql.or 3514 [ + + ]: 3 : if (xlogreader->nonblocking)
3515 : 1 : return XLREAD_WOULDBLOCK;
3516 : :
1349 heikki.linnakangas@i 3517 : 2 : lastSourceFailed = true;
3518 : :
3519 [ + - ]: 2 : if (readFile >= 0)
3520 : 2 : close(readFile);
3521 : 2 : readFile = -1;
3522 : 2 : readLen = 0;
3523 : 2 : readSource = XLOG_FROM_ANY;
3524 : :
3525 : : /* In standby-mode, keep trying */
3526 [ + - ]: 2 : if (StandbyMode)
3527 : 2 : goto retry;
3528 : : else
1299 tmunro@postgresql.or 3529 :UBC 0 : return XLREAD_FAIL;
3530 : : }
3531 : :
3532 : : /*
3533 : : * Open the WAL segment containing WAL location 'RecPtr'.
3534 : : *
3535 : : * The segment can be fetched via restore_command, or via walreceiver having
3536 : : * streamed the record, or it can already be present in pg_wal. Checking
3537 : : * pg_wal is mainly for crash recovery, but it will be polled in standby mode
3538 : : * too, in case someone copies a new segment directly to pg_wal. That is not
3539 : : * documented or recommended, though.
3540 : : *
3541 : : * If 'fetching_ckpt' is true, we're fetching a checkpoint record, and should
3542 : : * prepare to read WAL starting from RedoStartLSN after this.
3543 : : *
3544 : : * 'RecPtr' might not point to the beginning of the record we're interested
3545 : : * in, it might also point to the page or segment header. In that case,
3546 : : * 'tliRecPtr' is the position of the WAL record we're interested in. It is
3547 : : * used to decide which timeline to stream the requested WAL from.
3548 : : *
3549 : : * 'replayLSN' is the current replay LSN, so that if we scan for new
3550 : : * timelines, we can reject a switch to a timeline that branched off before
3551 : : * this point.
3552 : : *
3553 : : * If the record is not immediately available, the function returns false
3554 : : * if we're not in standby mode. In standby mode, waits for it to become
3555 : : * available.
3556 : : *
3557 : : * When the requested record becomes available, the function opens the file
3558 : : * containing it (if not open already), and returns XLREAD_SUCCESS. When end
3559 : : * of standby mode is triggered by the user, and there is no more WAL
3560 : : * available, returns XLREAD_FAIL.
3561 : : *
3562 : : * If nonblocking is true, then give up immediately if we can't satisfy the
3563 : : * request, returning XLREAD_WOULDBLOCK instead of waiting.
3564 : : */
3565 : : static XLogPageReadResult
1349 heikki.linnakangas@i 3566 :CBC 14047 : WaitForWALToBecomeAvailable(XLogRecPtr RecPtr, bool randAccess,
3567 : : bool fetching_ckpt, XLogRecPtr tliRecPtr,
3568 : : TimeLineID replayTLI, XLogRecPtr replayLSN,
3569 : : bool nonblocking)
3570 : : {
3571 : : static TimestampTz last_fail_time = 0;
3572 : : TimestampTz now;
3573 : 14047 : bool streaming_reply_sent = false;
3574 : :
3575 : : /*-------
3576 : : * Standby mode is implemented by a state machine:
3577 : : *
3578 : : * 1. Read from either archive or pg_wal (XLOG_FROM_ARCHIVE), or just
3579 : : * pg_wal (XLOG_FROM_PG_WAL)
3580 : : * 2. Check for promotion trigger request
3581 : : * 3. Read from primary server via walreceiver (XLOG_FROM_STREAM)
3582 : : * 4. Rescan timelines
3583 : : * 5. Sleep wal_retrieve_retry_interval milliseconds, and loop back to 1.
3584 : : *
3585 : : * Failure to read from the current source advances the state machine to
3586 : : * the next state.
3587 : : *
3588 : : * 'currentSource' indicates the current state. There are no currentSource
3589 : : * values for "check trigger", "rescan timelines", and "sleep" states,
3590 : : * those actions are taken when reading from the previous source fails, as
3591 : : * part of advancing to the next state.
3592 : : *
3593 : : * If standby mode is turned off while reading WAL from stream, we move
3594 : : * to XLOG_FROM_ARCHIVE and reset lastSourceFailed, to force fetching
3595 : : * the files (which would be required at end of recovery, e.g., timeline
3596 : : * history file) from archive or pg_wal. We don't need to kill WAL receiver
3597 : : * here because it's already stopped when standby mode is turned off at
3598 : : * the end of recovery.
3599 : : *-------
3600 : : */
3601 [ + + ]: 14047 : if (!InArchiveRecovery)
3602 : 910 : currentSource = XLOG_FROM_PG_WAL;
3603 [ + + ]: 13137 : else if (currentSource == XLOG_FROM_ANY ||
3604 [ + + - + ]: 13028 : (!StandbyMode && currentSource == XLOG_FROM_STREAM))
3605 : : {
3606 : 109 : lastSourceFailed = false;
3607 : 109 : currentSource = XLOG_FROM_ARCHIVE;
3608 : : }
3609 : :
3610 : : for (;;)
3611 : 11798 : {
3612 : 25845 : XLogSource oldSource = currentSource;
3613 : 25845 : bool startWalReceiver = false;
3614 : :
3615 : : /*
3616 : : * First check if we failed to read from the current source, and
3617 : : * advance the state machine if so. The failure to read might've
3618 : : * happened outside this function, e.g when a CRC check fails on a
3619 : : * record, or within this loop.
3620 : : */
3621 [ + + ]: 25845 : if (lastSourceFailed)
3622 : : {
3623 : : /*
3624 : : * Don't allow any retry loops to occur during nonblocking
3625 : : * readahead. Let the caller process everything that has been
3626 : : * decoded already first.
3627 : : */
1299 tmunro@postgresql.or 3628 [ + + ]: 408 : if (nonblocking)
3629 : 70 : return XLREAD_WOULDBLOCK;
3630 : :
1349 heikki.linnakangas@i 3631 [ + + - ]: 338 : switch (currentSource)
3632 : : {
3633 : 206 : case XLOG_FROM_ARCHIVE:
3634 : : case XLOG_FROM_PG_WAL:
3635 : :
3636 : : /*
3637 : : * Check to see if promotion is requested. Note that we do
3638 : : * this only after failure, so when you promote, we still
3639 : : * finish replaying as much as we can from archive and
3640 : : * pg_wal before failover.
3641 : : */
3642 [ + + + + ]: 206 : if (StandbyMode && CheckForStandbyTrigger())
3643 : : {
3644 : 14 : XLogShutdownWalRcv();
1299 tmunro@postgresql.or 3645 : 14 : return XLREAD_FAIL;
3646 : : }
3647 : :
3648 : : /*
3649 : : * Not in standby mode, and we've now tried the archive
3650 : : * and pg_wal.
3651 : : */
1349 heikki.linnakangas@i 3652 [ + + ]: 192 : if (!StandbyMode)
1299 tmunro@postgresql.or 3653 : 20 : return XLREAD_FAIL;
3654 : :
3655 : : /*
3656 : : * Move to XLOG_FROM_STREAM state, and set to start a
3657 : : * walreceiver if necessary.
3658 : : */
1349 heikki.linnakangas@i 3659 : 172 : currentSource = XLOG_FROM_STREAM;
3660 : 172 : startWalReceiver = true;
3661 : 172 : break;
3662 : :
3663 : 132 : case XLOG_FROM_STREAM:
3664 : :
3665 : : /*
3666 : : * Failure while streaming. Most likely, we got here
3667 : : * because streaming replication was terminated, or
3668 : : * promotion was triggered. But we also get here if we
3669 : : * find an invalid record in the WAL streamed from the
3670 : : * primary, in which case something is seriously wrong.
3671 : : * There's little chance that the problem will just go
3672 : : * away, but PANIC is not good for availability either,
3673 : : * especially in hot standby mode. So, we treat that the
3674 : : * same as disconnection, and retry from archive/pg_wal
3675 : : * again. The WAL in the archive should be identical to
3676 : : * what was streamed, so it's unlikely that it helps, but
3677 : : * one can hope...
3678 : : */
3679 : :
3680 : : /*
3681 : : * We should be able to move to XLOG_FROM_STREAM only in
3682 : : * standby mode.
3683 : : */
3684 [ - + ]: 132 : Assert(StandbyMode);
3685 : :
3686 : : /*
3687 : : * Before we leave XLOG_FROM_STREAM state, make sure that
3688 : : * walreceiver is not active, so that it won't overwrite
3689 : : * WAL that we restore from archive.
3690 : : */
1138 noah@leadboat.com 3691 : 132 : XLogShutdownWalRcv();
3692 : :
3693 : : /*
3694 : : * Before we sleep, re-scan for possible new timelines if
3695 : : * we were requested to recover to the latest timeline.
3696 : : */
1349 heikki.linnakangas@i 3697 [ + - ]: 132 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
3698 : : {
3699 [ + + ]: 132 : if (rescanLatestTimeLine(replayTLI, replayLSN))
3700 : : {
3701 : 6 : currentSource = XLOG_FROM_ARCHIVE;
3702 : 6 : break;
3703 : : }
3704 : : }
3705 : :
3706 : : /*
3707 : : * XLOG_FROM_STREAM is the last state in our state
3708 : : * machine, so we've exhausted all the options for
3709 : : * obtaining the requested WAL. We're going to loop back
3710 : : * and retry from the archive, but if it hasn't been long
3711 : : * since last attempt, sleep wal_retrieve_retry_interval
3712 : : * milliseconds to avoid busy-waiting.
3713 : : */
3714 : 126 : now = GetCurrentTimestamp();
3715 [ + + ]: 126 : if (!TimestampDifferenceExceeds(last_fail_time, now,
3716 : : wal_retrieve_retry_interval))
3717 : : {
3718 : : long wait_time;
3719 : :
3720 : 126 : wait_time = wal_retrieve_retry_interval -
3721 : 63 : TimestampDifferenceMilliseconds(last_fail_time, now);
3722 : :
112 alvherre@kurilemu.de 3723 [ + - ]:GNC 63 : elog(LOG, "waiting for WAL to become available at %X/%08X",
3724 : : LSN_FORMAT_ARGS(RecPtr));
3725 : :
3726 : : /* Do background tasks that might benefit us later. */
1063 tgl@sss.pgh.pa.us 3727 :CBC 63 : KnownAssignedTransactionIdsIdleMaintenance();
3728 : :
1349 heikki.linnakangas@i 3729 : 63 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3730 : : WL_LATCH_SET | WL_TIMEOUT |
3731 : : WL_EXIT_ON_PM_DEATH,
3732 : : wait_time,
3733 : : WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL);
3734 : 63 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3735 : 63 : now = GetCurrentTimestamp();
3736 : :
3737 : : /* Handle interrupt signals of startup process */
236 3738 : 63 : ProcessStartupProcInterrupts();
3739 : : }
1349 3740 : 112 : last_fail_time = now;
3741 : 112 : currentSource = XLOG_FROM_ARCHIVE;
3742 : 112 : break;
3743 : :
1349 heikki.linnakangas@i 3744 :UBC 0 : default:
3745 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
3746 : : }
3747 : : }
1349 heikki.linnakangas@i 3748 [ + + ]:CBC 25437 : else if (currentSource == XLOG_FROM_PG_WAL)
3749 : : {
3750 : : /*
3751 : : * We just successfully read a file in pg_wal. We prefer files in
3752 : : * the archive over ones in pg_wal, so try the next file again
3753 : : * from the archive first.
3754 : : */
3755 [ - + ]: 908 : if (InArchiveRecovery)
1349 heikki.linnakangas@i 3756 :UBC 0 : currentSource = XLOG_FROM_ARCHIVE;
3757 : : }
3758 : :
1349 heikki.linnakangas@i 3759 [ + + ]:CBC 25727 : if (currentSource != oldSource)
3760 [ + + + - ]: 290 : elog(DEBUG2, "switched WAL source from %s to %s after %s",
3761 : : xlogSourceNames[oldSource], xlogSourceNames[currentSource],
3762 : : lastSourceFailed ? "failure" : "success");
3763 : :
3764 : : /*
3765 : : * We've now handled possible failure. Try to read from the chosen
3766 : : * source.
3767 : : */
3768 : 25727 : lastSourceFailed = false;
3769 : :
3770 [ + + - ]: 25727 : switch (currentSource)
3771 : : {
3772 : 1657 : case XLOG_FROM_ARCHIVE:
3773 : : case XLOG_FROM_PG_WAL:
3774 : :
3775 : : /*
3776 : : * WAL receiver must not be running when reading WAL from
3777 : : * archive or pg_wal.
3778 : : */
3779 [ - + ]: 1657 : Assert(!WalRcvStreaming());
3780 : :
3781 : : /* Close any old file we might have open. */
3782 [ + + ]: 1657 : if (readFile >= 0)
3783 : : {
3784 : 71 : close(readFile);
3785 : 71 : readFile = -1;
3786 : : }
3787 : : /* Reset curFileTLI if random fetch. */
3788 [ + + ]: 1657 : if (randAccess)
3789 : 1053 : curFileTLI = 0;
3790 : :
3791 : : /*
3792 : : * Try to restore the file from archive, or read an existing
3793 : : * file from pg_wal.
3794 : : */
412 michael@paquier.xyz 3795 : 1657 : readFile = XLogFileReadAnyTLI(readSegNo,
1349 heikki.linnakangas@i 3796 [ + + ]: 1657 : currentSource == XLOG_FROM_ARCHIVE ? XLOG_FROM_ANY :
3797 : : currentSource);
3798 [ + + ]: 1657 : if (readFile >= 0)
1299 tmunro@postgresql.or 3799 : 1499 : return XLREAD_SUCCESS; /* success! */
3800 : :
3801 : : /*
3802 : : * Nope, not found in archive or pg_wal.
3803 : : */
1349 heikki.linnakangas@i 3804 : 158 : lastSourceFailed = true;
3805 : 158 : break;
3806 : :
3807 : 24070 : case XLOG_FROM_STREAM:
3808 : : {
3809 : : bool havedata;
3810 : :
3811 : : /*
3812 : : * We should be able to move to XLOG_FROM_STREAM only in
3813 : : * standby mode.
3814 : : */
3815 [ - + ]: 24070 : Assert(StandbyMode);
3816 : :
3817 : : /*
3818 : : * First, shutdown walreceiver if its restart has been
3819 : : * requested -- but no point if we're already slated for
3820 : : * starting it.
3821 : : */
3822 [ + + + - ]: 24070 : if (pendingWalRcvRestart && !startWalReceiver)
3823 : : {
3824 : 4 : XLogShutdownWalRcv();
3825 : :
3826 : : /*
3827 : : * Re-scan for possible new timelines if we were
3828 : : * requested to recover to the latest timeline.
3829 : : */
3830 [ + - ]: 4 : if (recoveryTargetTimeLineGoal ==
3831 : : RECOVERY_TARGET_TIMELINE_LATEST)
3832 : 4 : rescanLatestTimeLine(replayTLI, replayLSN);
3833 : :
3834 : 4 : startWalReceiver = true;
3835 : : }
3836 : 24070 : pendingWalRcvRestart = false;
3837 : :
3838 : : /*
3839 : : * Launch walreceiver if needed.
3840 : : *
3841 : : * If fetching_ckpt is true, RecPtr points to the initial
3842 : : * checkpoint location. In that case, we use RedoStartLSN
3843 : : * as the streaming start position instead of RecPtr, so
3844 : : * that when we later jump backwards to start redo at
3845 : : * RedoStartLSN, we will have the logs streamed already.
3846 : : */
3847 [ + + + - ]: 24070 : if (startWalReceiver &&
3848 [ + + ]: 176 : PrimaryConnInfo && strcmp(PrimaryConnInfo, "") != 0)
3849 : : {
3850 : : XLogRecPtr ptr;
3851 : : TimeLineID tli;
3852 : :
3853 [ - + ]: 154 : if (fetching_ckpt)
3854 : : {
1349 heikki.linnakangas@i 3855 :UBC 0 : ptr = RedoStartLSN;
3856 : 0 : tli = RedoStartTLI;
3857 : : }
3858 : : else
3859 : : {
1349 heikki.linnakangas@i 3860 :CBC 154 : ptr = RecPtr;
3861 : :
3862 : : /*
3863 : : * Use the record begin position to determine the
3864 : : * TLI, rather than the position we're reading.
3865 : : */
3866 : 154 : tli = tliOfPointInHistory(tliRecPtr, expectedTLEs);
3867 : :
3868 [ + - - + ]: 154 : if (curFileTLI > 0 && tli < curFileTLI)
112 alvherre@kurilemu.de 3869 [ # # ]: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",
3870 : : LSN_FORMAT_ARGS(tliRecPtr),
3871 : : tli, curFileTLI);
3872 : : }
1349 heikki.linnakangas@i 3873 :CBC 154 : curFileTLI = tli;
3874 : 154 : SetInstallXLogFileSegmentActive();
3875 : 154 : RequestXLogStreaming(tli, ptr, PrimaryConnInfo,
3876 : : PrimarySlotName,
3877 : : wal_receiver_create_temp_slot);
3878 : 154 : flushedUpto = 0;
3879 : : }
3880 : :
3881 : : /*
3882 : : * Check if WAL receiver is active or wait to start up.
3883 : : */
3884 [ + + ]: 24070 : if (!WalRcvStreaming())
3885 : : {
3886 : 107 : lastSourceFailed = true;
3887 : 107 : break;
3888 : : }
3889 : :
3890 : : /*
3891 : : * Walreceiver is active, so see if new data has arrived.
3892 : : *
3893 : : * We only advance XLogReceiptTime when we obtain fresh
3894 : : * WAL from walreceiver and observe that we had already
3895 : : * processed everything before the most recent "chunk"
3896 : : * that it flushed to disk. In steady state where we are
3897 : : * keeping up with the incoming data, XLogReceiptTime will
3898 : : * be updated on each cycle. When we are behind,
3899 : : * XLogReceiptTime will not advance, so the grace time
3900 : : * allotted to conflicting queries will decrease.
3901 : : */
3902 [ + + ]: 23963 : if (RecPtr < flushedUpto)
3903 : 1606 : havedata = true;
3904 : : else
3905 : : {
3906 : : XLogRecPtr latestChunkStart;
3907 : :
3908 : 22357 : flushedUpto = GetWalRcvFlushRecPtr(&latestChunkStart, &receiveTLI);
3909 [ + + + - ]: 22357 : if (RecPtr < flushedUpto && receiveTLI == curFileTLI)
3910 : : {
3911 : 11567 : havedata = true;
3912 [ + + ]: 11567 : if (latestChunkStart <= RecPtr)
3913 : : {
3914 : 8542 : XLogReceiptTime = GetCurrentTimestamp();
3915 : 8542 : SetCurrentChunkStartTime(XLogReceiptTime);
3916 : : }
3917 : : }
3918 : : else
3919 : 10790 : havedata = false;
3920 : : }
3921 [ + + ]: 23963 : if (havedata)
3922 : : {
3923 : : /*
3924 : : * Great, streamed far enough. Open the file if it's
3925 : : * not open already. Also read the timeline history
3926 : : * file if we haven't initialized timeline history
3927 : : * yet; it should be streamed over and present in
3928 : : * pg_wal by now. Use XLOG_FROM_STREAM so that source
3929 : : * info is set correctly and XLogReceiptTime isn't
3930 : : * changed.
3931 : : *
3932 : : * NB: We must set readTimeLineHistory based on
3933 : : * recoveryTargetTLI, not receiveTLI. Normally they'll
3934 : : * be the same, but if recovery_target_timeline is
3935 : : * 'latest' and archiving is configured, then it's
3936 : : * possible that we managed to retrieve one or more
3937 : : * new timeline history files from the archive,
3938 : : * updating recoveryTargetTLI.
3939 : : */
3940 [ + + ]: 13173 : if (readFile < 0)
3941 : : {
3942 [ - + ]: 1035 : if (!expectedTLEs)
1349 heikki.linnakangas@i 3943 :UBC 0 : expectedTLEs = readTimeLineHistory(recoveryTargetTLI);
412 michael@paquier.xyz 3944 :CBC 1035 : readFile = XLogFileRead(readSegNo, receiveTLI,
3945 : : XLOG_FROM_STREAM, false);
1349 heikki.linnakangas@i 3946 [ - + ]: 1035 : Assert(readFile >= 0);
3947 : : }
3948 : : else
3949 : : {
3950 : : /* just make sure source info is correct... */
3951 : 12138 : readSource = XLOG_FROM_STREAM;
3952 : 12138 : XLogReceiptSource = XLOG_FROM_STREAM;
1299 tmunro@postgresql.or 3953 : 12138 : return XLREAD_SUCCESS;
3954 : : }
1349 heikki.linnakangas@i 3955 : 1035 : break;
3956 : : }
3957 : :
3958 : : /* In nonblocking mode, return rather than sleeping. */
1299 tmunro@postgresql.or 3959 [ + + ]: 10790 : if (nonblocking)
3960 : 254 : return XLREAD_WOULDBLOCK;
3961 : :
3962 : : /*
3963 : : * Data not here yet. Check for trigger, then wait for
3964 : : * walreceiver to wake us up when new WAL arrives.
3965 : : */
1349 heikki.linnakangas@i 3966 [ + + ]: 10536 : if (CheckForStandbyTrigger())
3967 : : {
3968 : : /*
3969 : : * Note that we don't return XLREAD_FAIL immediately
3970 : : * here. After being triggered, we still want to
3971 : : * replay all the WAL that was already streamed. It's
3972 : : * in pg_wal now, so we just treat this as a failure,
3973 : : * and the state machine will move on to replay the
3974 : : * streamed WAL from pg_wal, and then recheck the
3975 : : * trigger and exit replay.
3976 : : */
3977 : 25 : lastSourceFailed = true;
3978 : 25 : break;
3979 : : }
3980 : :
3981 : : /*
3982 : : * Since we have replayed everything we have received so
3983 : : * far and are about to start waiting for more WAL, let's
3984 : : * tell the upstream server our replay location now so
3985 : : * that pg_stat_replication doesn't show stale
3986 : : * information.
3987 : : */
3988 [ + + ]: 10511 : if (!streaming_reply_sent)
3989 : : {
3990 : 9128 : WalRcvForceReply();
3991 : 9128 : streaming_reply_sent = true;
3992 : : }
3993 : :
3994 : : /* Do any background tasks that might benefit us later. */
1063 tgl@sss.pgh.pa.us 3995 : 10511 : KnownAssignedTransactionIdsIdleMaintenance();
3996 : :
3997 : : /* Update pg_stat_recovery_prefetch before sleeping. */
1299 tmunro@postgresql.or 3998 : 10511 : XLogPrefetcherComputeStats(xlogprefetcher);
3999 : :
4000 : : /*
4001 : : * Wait for more WAL to arrive, when we will be woken
4002 : : * immediately by the WAL receiver.
4003 : : */
1349 heikki.linnakangas@i 4004 : 10511 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
4005 : : WL_LATCH_SET | WL_EXIT_ON_PM_DEATH,
4006 : : -1L,
4007 : : WAIT_EVENT_RECOVERY_WAL_STREAM);
4008 : 10511 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
4009 : 10511 : break;
4010 : : }
4011 : :
1349 heikki.linnakangas@i 4012 :UBC 0 : default:
4013 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
4014 : : }
4015 : :
4016 : : /*
4017 : : * Check for recovery pause here so that we can confirm more quickly
4018 : : * that a requested pause has actually taken effect.
4019 : : */
1349 heikki.linnakangas@i 4020 [ + + ]:CBC 11836 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
4021 : : RECOVERY_NOT_PAUSED)
4022 : 2 : recoveryPausesHere(false);
4023 : :
4024 : : /*
4025 : : * This possibly-long loop needs to handle interrupts of startup
4026 : : * process.
4027 : : */
236 4028 : 11836 : ProcessStartupProcInterrupts();
4029 : : }
4030 : :
4031 : : return XLREAD_FAIL; /* not reached */
4032 : : }
4033 : :
4034 : :
4035 : : /*
4036 : : * Determine what log level should be used to report a corrupt WAL record
4037 : : * in the current WAL page, previously read by XLogPageRead().
4038 : : *
4039 : : * 'emode' is the error mode that would be used to report a file-not-found
4040 : : * or legitimate end-of-WAL situation. Generally, we use it as-is, but if
4041 : : * we're retrying the exact same record that we've tried previously, only
4042 : : * complain the first time to keep the noise down. However, we only do when
4043 : : * reading from pg_wal, because we don't expect any invalid records in archive
4044 : : * or in records streamed from the primary. Files in the archive should be complete,
4045 : : * and we should never hit the end of WAL because we stop and wait for more WAL
4046 : : * to arrive before replaying it.
4047 : : *
4048 : : * NOTE: This function remembers the RecPtr value it was last called with,
4049 : : * to suppress repeated messages about the same record. Only call this when
4050 : : * you are about to ereport(), or you might cause a later message to be
4051 : : * erroneously suppressed.
4052 : : */
4053 : : static int
1349 4054 : 231 : emode_for_corrupt_record(int emode, XLogRecPtr RecPtr)
4055 : : {
4056 : : static XLogRecPtr lastComplaint = 0;
4057 : :
4058 [ + + + - ]: 231 : if (readSource == XLOG_FROM_PG_WAL && emode == LOG)
4059 : : {
4060 [ + + ]: 228 : if (RecPtr == lastComplaint)
4061 : 44 : emode = DEBUG1;
4062 : : else
4063 : 184 : lastComplaint = RecPtr;
4064 : : }
4065 : 231 : return emode;
4066 : : }
4067 : :
4068 : :
4069 : : /*
4070 : : * Subroutine to try to fetch and validate a prior checkpoint record.
4071 : : */
4072 : : static XLogRecord *
1299 tmunro@postgresql.or 4073 : 907 : ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher, XLogRecPtr RecPtr,
4074 : : TimeLineID replayTLI)
4075 : : {
4076 : : XLogRecord *record;
4077 : : uint8 info;
4078 : :
1349 heikki.linnakangas@i 4079 [ - + ]: 907 : Assert(xlogreader != NULL);
4080 : :
4081 [ - + ]: 907 : if (!XRecOffIsValid(RecPtr))
4082 : : {
1195 fujii@postgresql.org 4083 [ # # ]:UBC 0 : ereport(LOG,
4084 : : (errmsg("invalid checkpoint location")));
1349 heikki.linnakangas@i 4085 : 0 : return NULL;
4086 : : }
4087 : :
1299 tmunro@postgresql.or 4088 :CBC 907 : XLogPrefetcherBeginRead(xlogprefetcher, RecPtr);
4089 : 907 : record = ReadRecord(xlogprefetcher, LOG, true, replayTLI);
4090 : :
1349 heikki.linnakangas@i 4091 [ - + ]: 907 : if (record == NULL)
4092 : : {
1195 fujii@postgresql.org 4093 [ # # ]:UBC 0 : ereport(LOG,
4094 : : (errmsg("invalid checkpoint record")));
1349 heikki.linnakangas@i 4095 : 0 : return NULL;
4096 : : }
1349 heikki.linnakangas@i 4097 [ - + ]:CBC 907 : if (record->xl_rmid != RM_XLOG_ID)
4098 : : {
1195 fujii@postgresql.org 4099 [ # # ]:UBC 0 : ereport(LOG,
4100 : : (errmsg("invalid resource manager ID in checkpoint record")));
1349 heikki.linnakangas@i 4101 : 0 : return NULL;
4102 : : }
1349 heikki.linnakangas@i 4103 :CBC 907 : info = record->xl_info & ~XLR_INFO_MASK;
4104 [ + + - + ]: 907 : if (info != XLOG_CHECKPOINT_SHUTDOWN &&
4105 : : info != XLOG_CHECKPOINT_ONLINE)
4106 : : {
1195 fujii@postgresql.org 4107 [ # # ]:UBC 0 : ereport(LOG,
4108 : : (errmsg("invalid xl_info in checkpoint record")));
1349 heikki.linnakangas@i 4109 : 0 : return NULL;
4110 : : }
1349 heikki.linnakangas@i 4111 [ - + ]:CBC 907 : if (record->xl_tot_len != SizeOfXLogRecord + SizeOfXLogRecordDataHeaderShort + sizeof(CheckPoint))
4112 : : {
1195 fujii@postgresql.org 4113 [ # # ]:UBC 0 : ereport(LOG,
4114 : : (errmsg("invalid length of checkpoint record")));
1349 heikki.linnakangas@i 4115 : 0 : return NULL;
4116 : : }
1349 heikki.linnakangas@i 4117 :CBC 907 : return record;
4118 : : }
4119 : :
4120 : : /*
4121 : : * Scan for new timelines that might have appeared in the archive since we
4122 : : * started recovery.
4123 : : *
4124 : : * If there are any, the function changes recovery target TLI to the latest
4125 : : * one and returns 'true'.
4126 : : */
4127 : : static bool
4128 : 136 : rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN)
4129 : : {
4130 : : List *newExpectedTLEs;
4131 : : bool found;
4132 : : ListCell *cell;
4133 : : TimeLineID newtarget;
4134 : 136 : TimeLineID oldtarget = recoveryTargetTLI;
4135 : 136 : TimeLineHistoryEntry *currentTle = NULL;
4136 : :
4137 : 136 : newtarget = findNewestTimeLine(recoveryTargetTLI);
4138 [ + + ]: 136 : if (newtarget == recoveryTargetTLI)
4139 : : {
4140 : : /* No new timelines found */
4141 : 130 : return false;
4142 : : }
4143 : :
4144 : : /*
4145 : : * Determine the list of expected TLIs for the new TLI
4146 : : */
4147 : :
4148 : 6 : newExpectedTLEs = readTimeLineHistory(newtarget);
4149 : :
4150 : : /*
4151 : : * If the current timeline is not part of the history of the new timeline,
4152 : : * we cannot proceed to it.
4153 : : */
4154 : 6 : found = false;
4155 [ + - + - : 12 : foreach(cell, newExpectedTLEs)
+ - ]
4156 : : {
4157 : 12 : currentTle = (TimeLineHistoryEntry *) lfirst(cell);
4158 : :
4159 [ + + ]: 12 : if (currentTle->tli == recoveryTargetTLI)
4160 : : {
4161 : 6 : found = true;
4162 : 6 : break;
4163 : : }
4164 : : }
4165 [ - + ]: 6 : if (!found)
4166 : : {
1349 heikki.linnakangas@i 4167 [ # # ]:UBC 0 : ereport(LOG,
4168 : : (errmsg("new timeline %u is not a child of database system timeline %u",
4169 : : newtarget,
4170 : : replayTLI)));
4171 : 0 : return false;
4172 : : }
4173 : :
4174 : : /*
4175 : : * The current timeline was found in the history file, but check that the
4176 : : * next timeline was forked off from it *after* the current recovery
4177 : : * location.
4178 : : */
1349 heikki.linnakangas@i 4179 [ - + ]:CBC 6 : if (currentTle->end < replayLSN)
4180 : : {
1349 heikki.linnakangas@i 4181 [ # # ]:UBC 0 : ereport(LOG,
4182 : : errmsg("new timeline %u forked off current database system timeline %u before current recovery point %X/%08X",
4183 : : newtarget,
4184 : : replayTLI,
4185 : : LSN_FORMAT_ARGS(replayLSN)));
4186 : 0 : return false;
4187 : : }
4188 : :
4189 : : /* The new timeline history seems valid. Switch target */
1349 heikki.linnakangas@i 4190 :CBC 6 : recoveryTargetTLI = newtarget;
4191 : 6 : list_free_deep(expectedTLEs);
4192 : 6 : expectedTLEs = newExpectedTLEs;
4193 : :
4194 : : /*
4195 : : * As in StartupXLOG(), try to ensure we have all the history files
4196 : : * between the old target and new target in pg_wal.
4197 : : */
4198 : 6 : restoreTimeLineHistoryFiles(oldtarget + 1, newtarget);
4199 : :
4200 [ + - ]: 6 : ereport(LOG,
4201 : : (errmsg("new target timeline is %u",
4202 : : recoveryTargetTLI)));
4203 : :
4204 : 6 : return true;
4205 : : }
4206 : :
4207 : :
4208 : : /*
4209 : : * Open a logfile segment for reading (during recovery).
4210 : : *
4211 : : * If source == XLOG_FROM_ARCHIVE, the segment is retrieved from archive.
4212 : : * Otherwise, it's assumed to be already available in pg_wal.
4213 : : */
4214 : : static int
412 michael@paquier.xyz 4215 : 3102 : XLogFileRead(XLogSegNo segno, TimeLineID tli,
4216 : : XLogSource source, bool notfoundOk)
4217 : : {
4218 : : char xlogfname[MAXFNAMELEN];
4219 : : char activitymsg[MAXFNAMELEN + 16];
4220 : : char path[MAXPGPATH];
4221 : : int fd;
4222 : :
1349 heikki.linnakangas@i 4223 : 3102 : XLogFileName(xlogfname, tli, segno, wal_segment_size);
4224 : :
4225 [ + + - ]: 3102 : switch (source)
4226 : : {
4227 : 758 : case XLOG_FROM_ARCHIVE:
4228 : : /* Report recovery progress in PS display */
4229 : 758 : snprintf(activitymsg, sizeof(activitymsg), "waiting for %s",
4230 : : xlogfname);
4231 : 758 : set_ps_display(activitymsg);
4232 : :
4233 [ + + ]: 758 : if (!RestoreArchivedFile(path, xlogfname,
4234 : : "RECOVERYXLOG",
4235 : : wal_segment_size,
4236 : : InRedo))
4237 : 401 : return -1;
4238 : 357 : break;
4239 : :
4240 : 2344 : case XLOG_FROM_PG_WAL:
4241 : : case XLOG_FROM_STREAM:
4242 : 2344 : XLogFilePath(path, tli, segno, wal_segment_size);
4243 : 2344 : break;
4244 : :
1349 heikki.linnakangas@i 4245 :UBC 0 : default:
4246 [ # # ]: 0 : elog(ERROR, "invalid XLogFileRead source %d", source);
4247 : : }
4248 : :
4249 : : /*
4250 : : * If the segment was fetched from archival storage, replace the existing
4251 : : * xlog segment (if any) with the archival version.
4252 : : */
1349 heikki.linnakangas@i 4253 [ + + ]:CBC 2701 : if (source == XLOG_FROM_ARCHIVE)
4254 : : {
4255 [ - + ]: 357 : Assert(!IsInstallXLogFileSegmentActive());
4256 : 357 : KeepFileRestoredFromArchive(path, xlogfname);
4257 : :
4258 : : /*
4259 : : * Set path to point at the new file in pg_wal.
4260 : : */
4261 : 357 : snprintf(path, MAXPGPATH, XLOGDIR "/%s", xlogfname);
4262 : : }
4263 : :
4264 : 2701 : fd = BasicOpenFile(path, O_RDONLY | PG_BINARY);
4265 [ + + ]: 2701 : if (fd >= 0)
4266 : : {
4267 : : /* Success! */
4268 : 2534 : curFileTLI = tli;
4269 : :
4270 : : /* Report recovery progress in PS display */
4271 : 2534 : snprintf(activitymsg, sizeof(activitymsg), "recovering %s",
4272 : : xlogfname);
4273 : 2534 : set_ps_display(activitymsg);
4274 : :
4275 : : /* Track source of data in assorted state variables */
4276 : 2534 : readSource = source;
4277 : 2534 : XLogReceiptSource = source;
4278 : : /* In FROM_STREAM case, caller tracks receipt time, not me */
4279 [ + + ]: 2534 : if (source != XLOG_FROM_STREAM)
4280 : 1499 : XLogReceiptTime = GetCurrentTimestamp();
4281 : :
4282 : 2534 : return fd;
4283 : : }
4284 [ + - - + ]: 167 : if (errno != ENOENT || !notfoundOk) /* unexpected failure? */
1349 heikki.linnakangas@i 4285 [ # # ]:UBC 0 : ereport(PANIC,
4286 : : (errcode_for_file_access(),
4287 : : errmsg("could not open file \"%s\": %m", path)));
1349 heikki.linnakangas@i 4288 :CBC 167 : return -1;
4289 : : }
4290 : :
4291 : : /*
4292 : : * Open a logfile segment for reading (during recovery).
4293 : : *
4294 : : * This version searches for the segment with any TLI listed in expectedTLEs.
4295 : : */
4296 : : static int
412 michael@paquier.xyz 4297 : 1657 : XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source)
4298 : : {
4299 : : char path[MAXPGPATH];
4300 : : ListCell *cell;
4301 : : int fd;
4302 : : List *tles;
4303 : :
4304 : : /*
4305 : : * Loop looking for a suitable timeline ID: we might need to read any of
4306 : : * the timelines listed in expectedTLEs.
4307 : : *
4308 : : * We expect curFileTLI on entry to be the TLI of the preceding file in
4309 : : * sequence, or 0 if there was no predecessor. We do not allow curFileTLI
4310 : : * to go backwards; this prevents us from picking up the wrong file when a
4311 : : * parent timeline extends to higher segment numbers than the child we
4312 : : * want to read.
4313 : : *
4314 : : * If we haven't read the timeline history file yet, read it now, so that
4315 : : * we know which TLIs to scan. We don't save the list in expectedTLEs,
4316 : : * however, unless we actually find a valid segment. That way if there is
4317 : : * neither a timeline history file nor a WAL segment in the archive, and
4318 : : * streaming replication is set up, we'll read the timeline history file
4319 : : * streamed from the primary when we start streaming, instead of
4320 : : * recovering with a dummy history generated here.
4321 : : */
1349 heikki.linnakangas@i 4322 [ + + ]: 1657 : if (expectedTLEs)
4323 : 750 : tles = expectedTLEs;
4324 : : else
4325 : 907 : tles = readTimeLineHistory(recoveryTargetTLI);
4326 : :
4327 [ + - + + : 1830 : foreach(cell, tles)
+ + ]
4328 : : {
4329 : 1676 : TimeLineHistoryEntry *hent = (TimeLineHistoryEntry *) lfirst(cell);
4330 : 1676 : TimeLineID tli = hent->tli;
4331 : :
4332 [ + + ]: 1676 : if (tli < curFileTLI)
4333 : 4 : break; /* don't bother looking at too-old TLIs */
4334 : :
4335 : : /*
4336 : : * Skip scanning the timeline ID that the logfile segment to read
4337 : : * doesn't belong to
4338 : : */
4339 [ + + ]: 1672 : if (hent->begin != InvalidXLogRecPtr)
4340 : : {
4341 : 69 : XLogSegNo beginseg = 0;
4342 : :
4343 : 69 : XLByteToSeg(hent->begin, beginseg, wal_segment_size);
4344 : :
4345 : : /*
4346 : : * The logfile segment that doesn't belong to the timeline is
4347 : : * older or newer than the segment that the timeline started or
4348 : : * ended at, respectively. It's sufficient to check only the
4349 : : * starting segment of the timeline here. Since the timelines are
4350 : : * scanned in descending order in this loop, any segments newer
4351 : : * than the ending segment should belong to newer timeline and
4352 : : * have already been read before. So it's not necessary to check
4353 : : * the ending segment of the timeline here.
4354 : : */
4355 [ + + ]: 69 : if (segno < beginseg)
4356 : 6 : continue;
4357 : : }
4358 : :
4359 [ + + - + ]: 1666 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_ARCHIVE)
4360 : : {
412 michael@paquier.xyz 4361 : 758 : fd = XLogFileRead(segno, tli, XLOG_FROM_ARCHIVE, true);
1349 heikki.linnakangas@i 4362 [ + + ]: 758 : if (fd != -1)
4363 : : {
4364 [ - + ]: 357 : elog(DEBUG1, "got WAL segment from archive");
4365 [ + + ]: 357 : if (!expectedTLEs)
4366 : 14 : expectedTLEs = tles;
4367 : 1499 : return fd;
4368 : : }
4369 : : }
4370 : :
4371 [ + + + - ]: 1309 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_PG_WAL)
4372 : : {
412 michael@paquier.xyz 4373 : 1309 : fd = XLogFileRead(segno, tli, XLOG_FROM_PG_WAL, true);
1349 heikki.linnakangas@i 4374 [ + + ]: 1309 : if (fd != -1)
4375 : : {
4376 [ + + ]: 1142 : if (!expectedTLEs)
4377 : 893 : expectedTLEs = tles;
4378 : 1142 : return fd;
4379 : : }
4380 : : }
4381 : : }
4382 : :
4383 : : /* Couldn't find it. For simplicity, complain about front timeline */
4384 : 158 : XLogFilePath(path, recoveryTargetTLI, segno, wal_segment_size);
4385 : 158 : errno = ENOENT;
412 michael@paquier.xyz 4386 [ + + ]: 158 : ereport(DEBUG2,
4387 : : (errcode_for_file_access(),
4388 : : errmsg("could not open file \"%s\": %m", path)));
1349 heikki.linnakangas@i 4389 : 158 : return -1;
4390 : : }
4391 : :
4392 : : /*
4393 : : * Set flag to signal the walreceiver to restart. (The startup process calls
4394 : : * this on noticing a relevant configuration change.)
4395 : : */
4396 : : void
4397 : 5 : StartupRequestWalReceiverRestart(void)
4398 : : {
4399 [ + - + + ]: 5 : if (currentSource == XLOG_FROM_STREAM && WalRcvRunning())
4400 : : {
4401 [ + - ]: 4 : ereport(LOG,
4402 : : (errmsg("WAL receiver process shutdown requested")));
4403 : :
4404 : 4 : pendingWalRcvRestart = true;
4405 : : }
4406 : 5 : }
4407 : :
4408 : :
4409 : : /*
4410 : : * Has a standby promotion already been triggered?
4411 : : *
4412 : : * Unlike CheckForStandbyTrigger(), this works in any process
4413 : : * that's connected to shared memory.
4414 : : */
4415 : : bool
4416 : 51 : PromoteIsTriggered(void)
4417 : : {
4418 : : /*
4419 : : * We check shared state each time only until a standby promotion is
4420 : : * triggered. We can't trigger a promotion again, so there's no need to
4421 : : * keep checking after the shared variable has once been seen true.
4422 : : */
4423 [ + + ]: 51 : if (LocalPromoteIsTriggered)
4424 : 41 : return true;
4425 : :
4426 [ - + ]: 10 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4427 : 10 : LocalPromoteIsTriggered = XLogRecoveryCtl->SharedPromoteIsTriggered;
4428 : 10 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4429 : :
4430 : 10 : return LocalPromoteIsTriggered;
4431 : : }
4432 : :
4433 : : static void
4434 : 41 : SetPromoteIsTriggered(void)
4435 : : {
4436 [ - + ]: 41 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4437 : 41 : XLogRecoveryCtl->SharedPromoteIsTriggered = true;
4438 : 41 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4439 : :
4440 : : /*
4441 : : * Mark the recovery pause state as 'not paused' because the paused state
4442 : : * ends and promotion continues if a promotion is triggered while recovery
4443 : : * is paused. Otherwise pg_get_wal_replay_pause_state() can mistakenly
4444 : : * return 'paused' while a promotion is ongoing.
4445 : : */
4446 : 41 : SetRecoveryPause(false);
4447 : :
4448 : 41 : LocalPromoteIsTriggered = true;
4449 : 41 : }
4450 : :
4451 : : /*
4452 : : * Check whether a promote request has arrived.
4453 : : */
4454 : : static bool
4455 : 10870 : CheckForStandbyTrigger(void)
4456 : : {
4457 [ + + ]: 10870 : if (LocalPromoteIsTriggered)
4458 : 40 : return true;
4459 : :
4460 [ + + + - ]: 10830 : if (IsPromoteSignaled() && CheckPromoteSignal())
4461 : : {
4462 [ + - ]: 41 : ereport(LOG, (errmsg("received promote request")));
4463 : 41 : RemovePromoteSignalFiles();
4464 : 41 : ResetPromoteSignaled();
4465 : 41 : SetPromoteIsTriggered();
4466 : 41 : return true;
4467 : : }
4468 : :
4469 : 10789 : return false;
4470 : : }
4471 : :
4472 : : /*
4473 : : * Remove the files signaling a standby promotion request.
4474 : : */
4475 : : void
4476 : 867 : RemovePromoteSignalFiles(void)
4477 : : {
4478 : 867 : unlink(PROMOTE_SIGNAL_FILE);
4479 : 867 : }
4480 : :
4481 : : /*
4482 : : * Check to see if a promote request has arrived.
4483 : : */
4484 : : bool
4485 : 615 : CheckPromoteSignal(void)
4486 : : {
4487 : : struct stat stat_buf;
4488 : :
4489 [ + + ]: 615 : if (stat(PROMOTE_SIGNAL_FILE, &stat_buf) == 0)
4490 : 82 : return true;
4491 : :
4492 : 533 : return false;
4493 : : }
4494 : :
4495 : : /*
4496 : : * Wake up startup process to replay newly arrived WAL, or to notice that
4497 : : * failover has been requested.
4498 : : */
4499 : : void
4500 : 40327 : WakeupRecovery(void)
4501 : : {
4502 : 40327 : SetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
4503 : 40327 : }
4504 : :
4505 : : /*
4506 : : * Schedule a walreceiver wakeup in the main recovery loop.
4507 : : */
4508 : : void
4509 : 2 : XLogRequestWalReceiverReply(void)
4510 : : {
4511 : 2 : doRequestWalReceiverReply = true;
4512 : 2 : }
4513 : :
4514 : : /*
4515 : : * Is HotStandby active yet? This is only important in special backends
4516 : : * since normal backends won't ever be able to connect until this returns
4517 : : * true. Postmaster knows this by way of signal, not via shared memory.
4518 : : *
4519 : : * Unlike testing standbyState, this works in any process that's connected to
4520 : : * shared memory. (And note that standbyState alone doesn't tell the truth
4521 : : * anyway.)
4522 : : */
4523 : : bool
4524 : 148 : HotStandbyActive(void)
4525 : : {
4526 : : /*
4527 : : * We check shared state each time only until Hot Standby is active. We
4528 : : * can't de-activate Hot Standby, so there's no need to keep checking
4529 : : * after the shared variable has once been seen true.
4530 : : */
4531 [ + + ]: 148 : if (LocalHotStandbyActive)
4532 : 16 : return true;
4533 : : else
4534 : : {
4535 : : /* spinlock is essential on machines with weak memory ordering! */
4536 [ - + ]: 132 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4537 : 132 : LocalHotStandbyActive = XLogRecoveryCtl->SharedHotStandbyActive;
4538 : 132 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4539 : :
4540 : 132 : return LocalHotStandbyActive;
4541 : : }
4542 : : }
4543 : :
4544 : : /*
4545 : : * Like HotStandbyActive(), but to be used only in WAL replay code,
4546 : : * where we don't need to ask any other process what the state is.
4547 : : */
4548 : : static bool
1349 heikki.linnakangas@i 4549 :UBC 0 : HotStandbyActiveInReplay(void)
4550 : : {
4551 [ # # # # ]: 0 : Assert(AmStartupProcess() || !IsPostmasterEnvironment);
4552 : 0 : return LocalHotStandbyActive;
4553 : : }
4554 : :
4555 : : /*
4556 : : * Get latest redo apply position.
4557 : : *
4558 : : * Exported to allow WALReceiver to read the pointer directly.
4559 : : */
4560 : : XLogRecPtr
1349 heikki.linnakangas@i 4561 :CBC 96986 : GetXLogReplayRecPtr(TimeLineID *replayTLI)
4562 : : {
4563 : : XLogRecPtr recptr;
4564 : : TimeLineID tli;
4565 : :
4566 [ + + ]: 96986 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4567 : 96986 : recptr = XLogRecoveryCtl->lastReplayedEndRecPtr;
4568 : 96986 : tli = XLogRecoveryCtl->lastReplayedTLI;
4569 : 96986 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4570 : :
4571 [ + + ]: 96986 : if (replayTLI)
4572 : 1715 : *replayTLI = tli;
4573 : 96986 : return recptr;
4574 : : }
4575 : :
4576 : :
4577 : : /*
4578 : : * Get position of last applied, or the record being applied.
4579 : : *
4580 : : * This is different from GetXLogReplayRecPtr() in that if a WAL
4581 : : * record is currently being applied, this includes that record.
4582 : : */
4583 : : XLogRecPtr
4584 : 6060 : GetCurrentReplayRecPtr(TimeLineID *replayEndTLI)
4585 : : {
4586 : : XLogRecPtr recptr;
4587 : : TimeLineID tli;
4588 : :
4589 [ + + ]: 6060 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4590 : 6060 : recptr = XLogRecoveryCtl->replayEndRecPtr;
4591 : 6060 : tli = XLogRecoveryCtl->replayEndTLI;
4592 : 6060 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4593 : :
4594 [ + - ]: 6060 : if (replayEndTLI)
4595 : 6060 : *replayEndTLI = tli;
4596 : 6060 : return recptr;
4597 : : }
4598 : :
4599 : : /*
4600 : : * Save timestamp of latest processed commit/abort record.
4601 : : *
4602 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4603 : : * seen by processes other than the startup process. Note in particular
4604 : : * that CreateRestartPoint is executed in the checkpointer.
4605 : : */
4606 : : static void
4607 : 21379 : SetLatestXTime(TimestampTz xtime)
4608 : : {
4609 [ - + ]: 21379 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4610 : 21379 : XLogRecoveryCtl->recoveryLastXTime = xtime;
4611 : 21379 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4612 : 21379 : }
4613 : :
4614 : : /*
4615 : : * Fetch timestamp of latest processed commit/abort record.
4616 : : */
4617 : : TimestampTz
4618 : 340 : GetLatestXTime(void)
4619 : : {
4620 : : TimestampTz xtime;
4621 : :
4622 [ - + ]: 340 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4623 : 340 : xtime = XLogRecoveryCtl->recoveryLastXTime;
4624 : 340 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4625 : :
4626 : 340 : return xtime;
4627 : : }
4628 : :
4629 : : /*
4630 : : * Save timestamp of the next chunk of WAL records to apply.
4631 : : *
4632 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4633 : : * seen by all backends.
4634 : : */
4635 : : static void
4636 : 8542 : SetCurrentChunkStartTime(TimestampTz xtime)
4637 : : {
4638 [ - + ]: 8542 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4639 : 8542 : XLogRecoveryCtl->currentChunkStartTime = xtime;
4640 : 8542 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4641 : 8542 : }
4642 : :
4643 : : /*
4644 : : * Fetch timestamp of latest processed commit/abort record.
4645 : : * Startup process maintains an accurate local copy in XLogReceiptTime
4646 : : */
4647 : : TimestampTz
4648 : 277 : GetCurrentChunkReplayStartTime(void)
4649 : : {
4650 : : TimestampTz xtime;
4651 : :
4652 [ - + ]: 277 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4653 : 277 : xtime = XLogRecoveryCtl->currentChunkStartTime;
4654 : 277 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4655 : :
4656 : 277 : return xtime;
4657 : : }
4658 : :
4659 : : /*
4660 : : * Returns time of receipt of current chunk of XLOG data, as well as
4661 : : * whether it was received from streaming replication or from archives.
4662 : : */
4663 : : void
4664 : 27 : GetXLogReceiptTime(TimestampTz *rtime, bool *fromStream)
4665 : : {
4666 : : /*
4667 : : * This must be executed in the startup process, since we don't export the
4668 : : * relevant state to shared memory.
4669 : : */
4670 [ - + ]: 27 : Assert(InRecovery);
4671 : :
4672 : 27 : *rtime = XLogReceiptTime;
4673 : 27 : *fromStream = (XLogReceiptSource == XLOG_FROM_STREAM);
4674 : 27 : }
4675 : :
4676 : : /*
4677 : : * Note that text field supplied is a parameter name and does not require
4678 : : * translation
4679 : : */
4680 : : void
4681 : 595 : RecoveryRequiresIntParameter(const char *param_name, int currValue, int minValue)
4682 : : {
4683 [ - + ]: 595 : if (currValue < minValue)
4684 : : {
1349 heikki.linnakangas@i 4685 [ # # ]:UBC 0 : if (HotStandbyActiveInReplay())
4686 : : {
4687 : 0 : bool warned_for_promote = false;
4688 : :
4689 [ # # ]: 0 : ereport(WARNING,
4690 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4691 : : errmsg("hot standby is not possible because of insufficient parameter settings"),
4692 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4693 : : param_name,
4694 : : currValue,
4695 : : minValue)));
4696 : :
4697 : 0 : SetRecoveryPause(true);
4698 : :
4699 [ # # ]: 0 : ereport(LOG,
4700 : : (errmsg("recovery has paused"),
4701 : : errdetail("If recovery is unpaused, the server will shut down."),
4702 : : errhint("You can then restart the server after making the necessary configuration changes.")));
4703 : :
4704 [ # # ]: 0 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
4705 : : {
236 4706 : 0 : ProcessStartupProcInterrupts();
4707 : :
1349 4708 [ # # ]: 0 : if (CheckForStandbyTrigger())
4709 : : {
4710 [ # # ]: 0 : if (!warned_for_promote)
4711 [ # # ]: 0 : ereport(WARNING,
4712 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4713 : : errmsg("promotion is not possible because of insufficient parameter settings"),
4714 : :
4715 : : /*
4716 : : * Repeat the detail from above so it's easy to find
4717 : : * in the log.
4718 : : */
4719 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4720 : : param_name,
4721 : : currValue,
4722 : : minValue),
4723 : : errhint("Restart the server after making the necessary configuration changes.")));
4724 : 0 : warned_for_promote = true;
4725 : : }
4726 : :
4727 : : /*
4728 : : * If recovery pause is requested then set it paused. While
4729 : : * we are in the loop, user might resume and pause again so
4730 : : * set this every time.
4731 : : */
4732 : 0 : ConfirmRecoveryPaused();
4733 : :
4734 : : /*
4735 : : * We wait on a condition variable that will wake us as soon
4736 : : * as the pause ends, but we use a timeout so we can check the
4737 : : * above conditions periodically too.
4738 : : */
4739 : 0 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
4740 : : WAIT_EVENT_RECOVERY_PAUSE);
4741 : : }
4742 : 0 : ConditionVariableCancelSleep();
4743 : : }
4744 : :
4745 [ # # ]: 0 : ereport(FATAL,
4746 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4747 : : errmsg("recovery aborted because of insufficient parameter settings"),
4748 : : /* Repeat the detail from above so it's easy to find in the log. */
4749 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4750 : : param_name,
4751 : : currValue,
4752 : : minValue),
4753 : : errhint("You can restart the server after making the necessary configuration changes.")));
4754 : : }
1349 heikki.linnakangas@i 4755 :CBC 595 : }
4756 : :
4757 : :
4758 : : /*
4759 : : * GUC check_hook for primary_slot_name
4760 : : */
4761 : : bool
1140 tgl@sss.pgh.pa.us 4762 : 1219 : check_primary_slot_name(char **newval, void **extra, GucSource source)
4763 : : {
4764 : : int err_code;
5 fujii@postgresql.org 4765 : 1219 : char *err_msg = NULL;
4766 : 1219 : char *err_hint = NULL;
4767 : :
1140 tgl@sss.pgh.pa.us 4768 [ + - + + ]: 1219 : if (*newval && strcmp(*newval, "") != 0 &&
5 fujii@postgresql.org 4769 [ - + ]:GNC 131 : !ReplicationSlotValidateNameInternal(*newval, false, &err_code,
4770 : : &err_msg, &err_hint))
4771 : : {
5 fujii@postgresql.org 4772 :UBC 0 : GUC_check_errcode(err_code);
4773 : 0 : GUC_check_errdetail("%s", err_msg);
4774 [ # # ]: 0 : if (err_hint != NULL)
4775 : 0 : GUC_check_errhint("%s", err_hint);
1140 tgl@sss.pgh.pa.us 4776 : 0 : return false;
4777 : : }
4778 : :
1140 tgl@sss.pgh.pa.us 4779 :CBC 1219 : return true;
4780 : : }
4781 : :
4782 : : /*
4783 : : * Recovery target settings: Only one of the several recovery_target* settings
4784 : : * may be set. Setting a second one results in an error. The global variable
4785 : : * recoveryTarget tracks which kind of recovery target was chosen. Other
4786 : : * variables store the actual target value (for example a string or a xid).
4787 : : * The assign functions of the parameters check whether a competing parameter
4788 : : * was already set. But we want to allow setting the same parameter multiple
4789 : : * times. We also want to allow unsetting a parameter and setting a different
4790 : : * one, so we unset recoveryTarget when the parameter is set to an empty
4791 : : * string.
4792 : : *
4793 : : * XXX this code is broken by design. Throwing an error from a GUC assign
4794 : : * hook breaks fundamental assumptions of guc.c. So long as all the variables
4795 : : * for which this can happen are PGC_POSTMASTER, the consequences are limited,
4796 : : * since we'd just abort postmaster startup anyway. Nonetheless it's likely
4797 : : * that we have odd behaviors such as unexpected GUC ordering dependencies.
4798 : : */
4799 : :
4800 : : pg_noreturn static void
4801 : 1 : error_multiple_recovery_targets(void)
4802 : : {
4803 [ + - ]: 1 : ereport(ERROR,
4804 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4805 : : errmsg("multiple recovery targets specified"),
4806 : : errdetail("At most one of \"recovery_target\", \"recovery_target_lsn\", \"recovery_target_name\", \"recovery_target_time\", \"recovery_target_xid\" may be set.")));
4807 : : }
4808 : :
4809 : : /*
4810 : : * GUC check_hook for recovery_target
4811 : : */
4812 : : bool
4813 : 1090 : check_recovery_target(char **newval, void **extra, GucSource source)
4814 : : {
4815 [ + + - + ]: 1090 : if (strcmp(*newval, "immediate") != 0 && strcmp(*newval, "") != 0)
4816 : : {
1140 tgl@sss.pgh.pa.us 4817 :UBC 0 : GUC_check_errdetail("The only allowed value is \"immediate\".");
4818 : 0 : return false;
4819 : : }
1140 tgl@sss.pgh.pa.us 4820 :CBC 1090 : return true;
4821 : : }
4822 : :
4823 : : /*
4824 : : * GUC assign_hook for recovery_target
4825 : : */
4826 : : void
4827 : 1090 : assign_recovery_target(const char *newval, void *extra)
4828 : : {
4829 [ - + ]: 1090 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1140 tgl@sss.pgh.pa.us 4830 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_IMMEDIATE)
4831 : 0 : error_multiple_recovery_targets();
4832 : :
1140 tgl@sss.pgh.pa.us 4833 [ + - + + ]:CBC 1090 : if (newval && strcmp(newval, "") != 0)
4834 : 1 : recoveryTarget = RECOVERY_TARGET_IMMEDIATE;
4835 : : else
4836 : 1089 : recoveryTarget = RECOVERY_TARGET_UNSET;
4837 : 1090 : }
4838 : :
4839 : : /*
4840 : : * GUC check_hook for recovery_target_lsn
4841 : : */
4842 : : bool
4843 : 1096 : check_recovery_target_lsn(char **newval, void **extra, GucSource source)
4844 : : {
4845 [ + + ]: 1096 : if (strcmp(*newval, "") != 0)
4846 : : {
4847 : : XLogRecPtr lsn;
4848 : : XLogRecPtr *myextra;
52 michael@paquier.xyz 4849 :GNC 9 : ErrorSaveContext escontext = {T_ErrorSaveContext};
4850 : :
4851 : 9 : lsn = pg_lsn_in_safe(*newval, (Node *) &escontext);
4852 [ - + ]: 9 : if (escontext.error_occurred)
1140 tgl@sss.pgh.pa.us 4853 :UBC 0 : return false;
4854 : :
214 dgustafsson@postgres 4855 :CBC 9 : myextra = (XLogRecPtr *) guc_malloc(LOG, sizeof(XLogRecPtr));
4856 [ - + ]: 9 : if (!myextra)
214 dgustafsson@postgres 4857 :UBC 0 : return false;
1140 tgl@sss.pgh.pa.us 4858 :CBC 9 : *myextra = lsn;
333 peter@eisentraut.org 4859 : 9 : *extra = myextra;
4860 : : }
1140 tgl@sss.pgh.pa.us 4861 : 1096 : return true;
4862 : : }
4863 : :
4864 : : /*
4865 : : * GUC assign_hook for recovery_target_lsn
4866 : : */
4867 : : void
4868 : 1096 : assign_recovery_target_lsn(const char *newval, void *extra)
4869 : : {
4870 [ - + ]: 1096 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1140 tgl@sss.pgh.pa.us 4871 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_LSN)
4872 : 0 : error_multiple_recovery_targets();
4873 : :
1140 tgl@sss.pgh.pa.us 4874 [ + - + + ]:CBC 1096 : if (newval && strcmp(newval, "") != 0)
4875 : : {
4876 : 9 : recoveryTarget = RECOVERY_TARGET_LSN;
4877 : 9 : recoveryTargetLSN = *((XLogRecPtr *) extra);
4878 : : }
4879 : : else
4880 : 1087 : recoveryTarget = RECOVERY_TARGET_UNSET;
4881 : 1096 : }
4882 : :
4883 : : /*
4884 : : * GUC check_hook for recovery_target_name
4885 : : */
4886 : : bool
4887 : 1096 : check_recovery_target_name(char **newval, void **extra, GucSource source)
4888 : : {
4889 : : /* Use the value of newval directly */
4890 [ - + ]: 1096 : if (strlen(*newval) >= MAXFNAMELEN)
4891 : : {
528 peter@eisentraut.org 4892 :UBC 0 : GUC_check_errdetail("\"%s\" is too long (maximum %d characters).",
4893 : : "recovery_target_name", MAXFNAMELEN - 1);
1140 tgl@sss.pgh.pa.us 4894 : 0 : return false;
4895 : : }
1140 tgl@sss.pgh.pa.us 4896 :CBC 1096 : return true;
4897 : : }
4898 : :
4899 : : /*
4900 : : * GUC assign_hook for recovery_target_name
4901 : : */
4902 : : void
4903 : 1096 : assign_recovery_target_name(const char *newval, void *extra)
4904 : : {
4905 [ - + ]: 1096 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1140 tgl@sss.pgh.pa.us 4906 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_NAME)
4907 : 0 : error_multiple_recovery_targets();
4908 : :
1140 tgl@sss.pgh.pa.us 4909 [ + - + + ]:CBC 1096 : if (newval && strcmp(newval, "") != 0)
4910 : : {
4911 : 6 : recoveryTarget = RECOVERY_TARGET_NAME;
4912 : 6 : recoveryTargetName = newval;
4913 : : }
4914 : : else
4915 : 1090 : recoveryTarget = RECOVERY_TARGET_UNSET;
4916 : 1096 : }
4917 : :
4918 : : /*
4919 : : * GUC check_hook for recovery_target_time
4920 : : *
4921 : : * The interpretation of the recovery_target_time string can depend on the
4922 : : * time zone setting, so we need to wait until after all GUC processing is
4923 : : * done before we can do the final parsing of the string. This check function
4924 : : * only does a parsing pass to catch syntax errors, but we store the string
4925 : : * and parse it again when we need to use it.
4926 : : */
4927 : : bool
4928 : 1092 : check_recovery_target_time(char **newval, void **extra, GucSource source)
4929 : : {
4930 [ + + ]: 1092 : if (strcmp(*newval, "") != 0)
4931 : : {
4932 : : /* reject some special values */
4933 [ + - ]: 3 : if (strcmp(*newval, "now") == 0 ||
4934 [ + - ]: 3 : strcmp(*newval, "today") == 0 ||
4935 [ + - ]: 3 : strcmp(*newval, "tomorrow") == 0 ||
4936 [ - + ]: 3 : strcmp(*newval, "yesterday") == 0)
4937 : : {
1140 tgl@sss.pgh.pa.us 4938 :UBC 0 : return false;
4939 : : }
4940 : :
4941 : : /*
4942 : : * parse timestamp value (see also timestamptz_in())
4943 : : */
4944 : : {
1140 tgl@sss.pgh.pa.us 4945 :CBC 3 : char *str = *newval;
4946 : : fsec_t fsec;
4947 : : struct pg_tm tt,
4948 : 3 : *tm = &tt;
4949 : : int tz;
4950 : : int dtype;
4951 : : int nf;
4952 : : int dterr;
4953 : : char *field[MAXDATEFIELDS];
4954 : : int ftype[MAXDATEFIELDS];
4955 : : char workbuf[MAXDATELEN + MAXDATEFIELDS];
4956 : : DateTimeErrorExtra dtextra;
4957 : : TimestampTz timestamp;
4958 : :
4959 : 3 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
4960 : : field, ftype, MAXDATEFIELDS, &nf);
4961 [ + - ]: 3 : if (dterr == 0)
1053 4962 : 3 : dterr = DecodeDateTime(field, ftype, nf,
4963 : : &dtype, tm, &fsec, &tz, &dtextra);
1140 4964 [ - + ]: 3 : if (dterr != 0)
1140 tgl@sss.pgh.pa.us 4965 :UBC 0 : return false;
1140 tgl@sss.pgh.pa.us 4966 [ - + ]:CBC 3 : if (dtype != DTK_DATE)
1140 tgl@sss.pgh.pa.us 4967 :UBC 0 : return false;
4968 : :
1140 tgl@sss.pgh.pa.us 4969 [ - + ]:CBC 3 : if (tm2timestamp(tm, fsec, &tz, ×tamp) != 0)
4970 : : {
334 alvherre@alvh.no-ip. 4971 :UBC 0 : GUC_check_errdetail("Timestamp out of range: \"%s\".", str);
1140 tgl@sss.pgh.pa.us 4972 : 0 : return false;
4973 : : }
4974 : : }
4975 : : }
1140 tgl@sss.pgh.pa.us 4976 :CBC 1092 : return true;
4977 : : }
4978 : :
4979 : : /*
4980 : : * GUC assign_hook for recovery_target_time
4981 : : */
4982 : : void
4983 : 1092 : assign_recovery_target_time(const char *newval, void *extra)
4984 : : {
4985 [ + + ]: 1092 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
4986 [ + - ]: 1 : recoveryTarget != RECOVERY_TARGET_TIME)
4987 : 1 : error_multiple_recovery_targets();
4988 : :
4989 [ + - + + ]: 1091 : if (newval && strcmp(newval, "") != 0)
4990 : 2 : recoveryTarget = RECOVERY_TARGET_TIME;
4991 : : else
4992 : 1089 : recoveryTarget = RECOVERY_TARGET_UNSET;
4993 : 1091 : }
4994 : :
4995 : : /*
4996 : : * GUC check_hook for recovery_target_timeline
4997 : : */
4998 : : bool
4999 : 1093 : check_recovery_target_timeline(char **newval, void **extra, GucSource source)
5000 : : {
5001 : : RecoveryTargetTimeLineGoal rttg;
5002 : : RecoveryTargetTimeLineGoal *myextra;
5003 : :
5004 [ - + ]: 1093 : if (strcmp(*newval, "current") == 0)
1140 tgl@sss.pgh.pa.us 5005 :UBC 0 : rttg = RECOVERY_TARGET_TIMELINE_CONTROLFILE;
1140 tgl@sss.pgh.pa.us 5006 [ + + ]:CBC 1093 : else if (strcmp(*newval, "latest") == 0)
5007 : 1090 : rttg = RECOVERY_TARGET_TIMELINE_LATEST;
5008 : : else
5009 : : {
5010 : : char *endp;
5011 : : uint64 timeline;
5012 : :
1140 tgl@sss.pgh.pa.us 5013 :GBC 3 : rttg = RECOVERY_TARGET_TIMELINE_NUMERIC;
5014 : :
5015 : 3 : errno = 0;
116 michael@paquier.xyz 5016 :GNC 3 : timeline = strtou64(*newval, &endp, 0);
5017 : :
5018 [ + + + - : 3 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
5019 : : {
5020 : 1 : GUC_check_errdetail("\"%s\" is not a valid number.",
5021 : : "recovery_target_timeline");
5022 : 3 : return false;
5023 : : }
5024 : :
5025 [ + + + - ]: 2 : if (timeline < 1 || timeline > PG_UINT32_MAX)
5026 : : {
5027 : 2 : GUC_check_errdetail("\"%s\" must be between %u and %u.",
5028 : : "recovery_target_timeline", 1, UINT_MAX);
1140 tgl@sss.pgh.pa.us 5029 :GBC 2 : return false;
5030 : : }
5031 : : }
5032 : :
214 dgustafsson@postgres 5033 :CBC 1090 : myextra = (RecoveryTargetTimeLineGoal *) guc_malloc(LOG, sizeof(RecoveryTargetTimeLineGoal));
5034 [ - + ]: 1090 : if (!myextra)
214 dgustafsson@postgres 5035 :UBC 0 : return false;
1140 tgl@sss.pgh.pa.us 5036 :CBC 1090 : *myextra = rttg;
333 peter@eisentraut.org 5037 : 1090 : *extra = myextra;
5038 : :
1140 tgl@sss.pgh.pa.us 5039 : 1090 : return true;
5040 : : }
5041 : :
5042 : : /*
5043 : : * GUC assign_hook for recovery_target_timeline
5044 : : */
5045 : : void
5046 : 1090 : assign_recovery_target_timeline(const char *newval, void *extra)
5047 : : {
5048 : 1090 : recoveryTargetTimeLineGoal = *((RecoveryTargetTimeLineGoal *) extra);
5049 [ - + ]: 1090 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1140 tgl@sss.pgh.pa.us 5050 :UBC 0 : recoveryTargetTLIRequested = (TimeLineID) strtoul(newval, NULL, 0);
5051 : : else
1140 tgl@sss.pgh.pa.us 5052 :CBC 1090 : recoveryTargetTLIRequested = 0;
5053 : 1090 : }
5054 : :
5055 : : /*
5056 : : * GUC check_hook for recovery_target_xid
5057 : : */
5058 : : bool
5059 : 1090 : check_recovery_target_xid(char **newval, void **extra, GucSource source)
5060 : : {
5061 [ + + ]: 1090 : if (strcmp(*newval, "") != 0)
5062 : : {
5063 : : TransactionId xid;
5064 : : TransactionId *myextra;
5065 : :
5066 : 1 : errno = 0;
5067 : 1 : xid = (TransactionId) strtou64(*newval, NULL, 0);
5068 [ + - - + ]: 1 : if (errno == EINVAL || errno == ERANGE)
1140 tgl@sss.pgh.pa.us 5069 :UBC 0 : return false;
5070 : :
214 dgustafsson@postgres 5071 :CBC 1 : myextra = (TransactionId *) guc_malloc(LOG, sizeof(TransactionId));
5072 [ - + ]: 1 : if (!myextra)
214 dgustafsson@postgres 5073 :UBC 0 : return false;
1140 tgl@sss.pgh.pa.us 5074 :CBC 1 : *myextra = xid;
333 peter@eisentraut.org 5075 : 1 : *extra = myextra;
5076 : : }
1140 tgl@sss.pgh.pa.us 5077 : 1090 : return true;
5078 : : }
5079 : :
5080 : : /*
5081 : : * GUC assign_hook for recovery_target_xid
5082 : : */
5083 : : void
5084 : 1090 : assign_recovery_target_xid(const char *newval, void *extra)
5085 : : {
5086 [ - + ]: 1090 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1140 tgl@sss.pgh.pa.us 5087 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_XID)
5088 : 0 : error_multiple_recovery_targets();
5089 : :
1140 tgl@sss.pgh.pa.us 5090 [ + - + + ]:CBC 1090 : if (newval && strcmp(newval, "") != 0)
5091 : : {
5092 : 1 : recoveryTarget = RECOVERY_TARGET_XID;
5093 : 1 : recoveryTargetXid = *((TransactionId *) extra);
5094 : : }
5095 : : else
5096 : 1089 : recoveryTarget = RECOVERY_TARGET_UNSET;
5097 : 1090 : }
|
