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) 1996-2026, 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 <time.h>
29 : : #include <sys/stat.h>
30 : : #include <sys/time.h>
31 : : #include <unistd.h>
32 : :
33 : : #include "access/timeline.h"
34 : : #include "access/transam.h"
35 : : #include "access/xact.h"
36 : : #include "access/xlog_internal.h"
37 : : #include "access/xlogarchive.h"
38 : : #include "access/xlogprefetcher.h"
39 : : #include "access/xlogreader.h"
40 : : #include "access/xlogrecovery.h"
41 : : #include "access/xlogutils.h"
42 : : #include "access/xlogwait.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 : : #include "utils/wait_event.h"
69 : :
70 : : /* Unsupported old recovery command file names (relative to $PGDATA) */
71 : : #define RECOVERY_COMMAND_FILE "recovery.conf"
72 : : #define RECOVERY_COMMAND_DONE "recovery.done"
73 : :
74 : : /*
75 : : * GUC support
76 : : */
77 : : const struct config_enum_entry recovery_target_action_options[] = {
78 : : {"pause", RECOVERY_TARGET_ACTION_PAUSE, false},
79 : : {"promote", RECOVERY_TARGET_ACTION_PROMOTE, false},
80 : : {"shutdown", RECOVERY_TARGET_ACTION_SHUTDOWN, false},
81 : : {NULL, 0, false}
82 : : };
83 : :
84 : : /* options formerly taken from recovery.conf for archive recovery */
85 : : char *recoveryRestoreCommand = NULL;
86 : : char *recoveryEndCommand = NULL;
87 : : char *archiveCleanupCommand = NULL;
88 : : RecoveryTargetType recoveryTarget = RECOVERY_TARGET_UNSET;
89 : : bool recoveryTargetInclusive = true;
90 : : int recoveryTargetAction = RECOVERY_TARGET_ACTION_PAUSE;
91 : : TransactionId recoveryTargetXid;
92 : : char *recovery_target_time_string;
93 : : TimestampTz recoveryTargetTime;
94 : : const char *recoveryTargetName;
95 : : XLogRecPtr recoveryTargetLSN;
96 : : int recovery_min_apply_delay = 0;
97 : :
98 : : /* options formerly taken from recovery.conf for XLOG streaming */
99 : : char *PrimaryConnInfo = NULL;
100 : : char *PrimarySlotName = NULL;
101 : : bool wal_receiver_create_temp_slot = false;
102 : :
103 : : /*
104 : : * recoveryTargetTimeLineGoal: what the user requested, if any
105 : : *
106 : : * recoveryTargetTLIRequested: numeric value of requested timeline, if constant
107 : : *
108 : : * recoveryTargetTLI: the currently understood target timeline; changes
109 : : *
110 : : * expectedTLEs: a list of TimeLineHistoryEntries for recoveryTargetTLI and
111 : : * the timelines of its known parents, newest first (so recoveryTargetTLI is
112 : : * always the first list member). Only these TLIs are expected to be seen in
113 : : * the WAL segments we read, and indeed only these TLIs will be considered as
114 : : * candidate WAL files to open at all.
115 : : *
116 : : * curFileTLI: the TLI appearing in the name of the current input WAL file.
117 : : * (This is not necessarily the same as the timeline from which we are
118 : : * replaying WAL, which StartupXLOG calls replayTLI, because we could be
119 : : * scanning data that was copied from an ancestor timeline when the current
120 : : * file was created.) During a sequential scan we do not allow this value
121 : : * to decrease.
122 : : */
123 : : RecoveryTargetTimeLineGoal recoveryTargetTimeLineGoal = RECOVERY_TARGET_TIMELINE_LATEST;
124 : : TimeLineID recoveryTargetTLIRequested = 0;
125 : : TimeLineID recoveryTargetTLI = 0;
126 : : static List *expectedTLEs;
127 : : static TimeLineID curFileTLI;
128 : :
129 : : /*
130 : : * When ArchiveRecoveryRequested is set, archive recovery was requested,
131 : : * ie. signal files were present. When InArchiveRecovery is set, we are
132 : : * currently recovering using offline XLOG archives. These variables are only
133 : : * valid in the startup process.
134 : : *
135 : : * When ArchiveRecoveryRequested is true, but InArchiveRecovery is false, we're
136 : : * currently performing crash recovery using only XLOG files in pg_wal, but
137 : : * will switch to using offline XLOG archives as soon as we reach the end of
138 : : * WAL in pg_wal.
139 : : */
140 : : bool ArchiveRecoveryRequested = false;
141 : : bool InArchiveRecovery = false;
142 : :
143 : : /*
144 : : * When StandbyModeRequested is set, standby mode was requested, i.e.
145 : : * standby.signal file was present. When StandbyMode is set, we are currently
146 : : * in standby mode. These variables are only valid in the startup process.
147 : : * They work similarly to ArchiveRecoveryRequested and InArchiveRecovery.
148 : : */
149 : : static bool StandbyModeRequested = false;
150 : : bool StandbyMode = false;
151 : :
152 : : /* was a signal file present at startup? */
153 : : static bool standby_signal_file_found = false;
154 : : static bool recovery_signal_file_found = false;
155 : :
156 : : /*
157 : : * CheckPointLoc is the position of the checkpoint record that determines
158 : : * where to start the replay. It comes from the backup label file or the
159 : : * control file.
160 : : *
161 : : * RedoStartLSN is the checkpoint's REDO location, also from the backup label
162 : : * file or the control file. In standby mode, XLOG streaming usually starts
163 : : * from the position where an invalid record was found. But if we fail to
164 : : * read even the initial checkpoint record, we use the REDO location instead
165 : : * of the checkpoint location as the start position of XLOG streaming.
166 : : * Otherwise we would have to jump backwards to the REDO location after
167 : : * reading the checkpoint record, because the REDO record can precede the
168 : : * checkpoint record.
169 : : */
170 : : static XLogRecPtr CheckPointLoc = InvalidXLogRecPtr;
171 : : static TimeLineID CheckPointTLI = 0;
172 : : static XLogRecPtr RedoStartLSN = InvalidXLogRecPtr;
173 : : static TimeLineID RedoStartTLI = 0;
174 : :
175 : : /*
176 : : * Local copy of SharedHotStandbyActive variable. False actually means "not
177 : : * known, need to check the shared state".
178 : : */
179 : : static bool LocalHotStandbyActive = false;
180 : :
181 : : /*
182 : : * Local copy of SharedPromoteIsTriggered variable. False actually means "not
183 : : * known, need to check the shared state".
184 : : */
185 : : static bool LocalPromoteIsTriggered = false;
186 : :
187 : : /* Has the recovery code requested a walreceiver wakeup? */
188 : : static bool doRequestWalReceiverReply;
189 : :
190 : : /* XLogReader object used to parse the WAL records */
191 : : static XLogReaderState *xlogreader = NULL;
192 : :
193 : : /* XLogPrefetcher object used to consume WAL records with read-ahead */
194 : : static XLogPrefetcher *xlogprefetcher = NULL;
195 : :
196 : : /* Parameters passed down from ReadRecord to the XLogPageRead callback. */
197 : : typedef struct XLogPageReadPrivate
198 : : {
199 : : int emode;
200 : : bool fetching_ckpt; /* are we fetching a checkpoint record? */
201 : : bool randAccess;
202 : : TimeLineID replayTLI;
203 : : } XLogPageReadPrivate;
204 : :
205 : : /* flag to tell XLogPageRead that we have started replaying */
206 : : static bool InRedo = false;
207 : :
208 : : /*
209 : : * Codes indicating where we got a WAL file from during recovery, or where
210 : : * to attempt to get one.
211 : : */
212 : : typedef enum
213 : : {
214 : : XLOG_FROM_ANY = 0, /* request to read WAL from any source */
215 : : XLOG_FROM_ARCHIVE, /* restored using restore_command */
216 : : XLOG_FROM_PG_WAL, /* existing file in pg_wal */
217 : : XLOG_FROM_STREAM, /* streamed from primary */
218 : : } XLogSource;
219 : :
220 : : /* human-readable names for XLogSources, for debugging output */
221 : : static const char *const xlogSourceNames[] = {"any", "archive", "pg_wal", "stream"};
222 : :
223 : : /*
224 : : * readFile is -1 or a kernel FD for the log file segment that's currently
225 : : * open for reading. readSegNo identifies the segment. readOff is the offset
226 : : * of the page just read, readLen indicates how much of it has been read into
227 : : * readBuf, and readSource indicates where we got the currently open file from.
228 : : *
229 : : * Note: we could use Reserve/ReleaseExternalFD to track consumption of this
230 : : * FD too (like for openLogFile in xlog.c); but it doesn't currently seem
231 : : * worthwhile, since the XLOG is not read by general-purpose sessions.
232 : : */
233 : : static int readFile = -1;
234 : : static XLogSegNo readSegNo = 0;
235 : : static uint32 readOff = 0;
236 : : static uint32 readLen = 0;
237 : : static XLogSource readSource = XLOG_FROM_ANY;
238 : :
239 : : /*
240 : : * Keeps track of which source we're currently reading from. This is
241 : : * different from readSource in that this is always set, even when we don't
242 : : * currently have a WAL file open. If lastSourceFailed is set, our last
243 : : * attempt to read from currentSource failed, and we should try another source
244 : : * next.
245 : : *
246 : : * pendingWalRcvRestart is set when a config change occurs that requires a
247 : : * walreceiver restart. This is only valid in XLOG_FROM_STREAM state.
248 : : */
249 : : static XLogSource currentSource = XLOG_FROM_ANY;
250 : : static bool lastSourceFailed = false;
251 : : static bool pendingWalRcvRestart = false;
252 : :
253 : : /*
254 : : * These variables track when we last obtained some WAL data to process,
255 : : * and where we got it from. (XLogReceiptSource is initially the same as
256 : : * readSource, but readSource gets reset to zero when we don't have data
257 : : * to process right now. It is also different from currentSource, which
258 : : * also changes when we try to read from a source and fail, while
259 : : * XLogReceiptSource tracks where we last successfully read some WAL.)
260 : : */
261 : : static TimestampTz XLogReceiptTime = 0;
262 : : static XLogSource XLogReceiptSource = XLOG_FROM_ANY;
263 : :
264 : : /* Local copy of WalRcv->flushedUpto */
265 : : static XLogRecPtr flushedUpto = InvalidXLogRecPtr;
266 : : static TimeLineID receiveTLI = 0;
267 : :
268 : : /*
269 : : * Copy of minRecoveryPoint and backupEndPoint from the control file.
270 : : *
271 : : * In order to reach consistency, we must replay the WAL up to
272 : : * minRecoveryPoint. If backupEndRequired is true, we must also reach
273 : : * backupEndPoint, or if it's invalid, an end-of-backup record corresponding
274 : : * to backupStartPoint.
275 : : *
276 : : * Note: In archive recovery, after consistency has been reached, the
277 : : * functions in xlog.c will start updating minRecoveryPoint in the control
278 : : * file. But this copy of minRecoveryPoint variable reflects the value at the
279 : : * beginning of recovery, and is *not* updated after consistency is reached.
280 : : */
281 : : static XLogRecPtr minRecoveryPoint;
282 : : static TimeLineID minRecoveryPointTLI;
283 : :
284 : : static XLogRecPtr backupStartPoint;
285 : : static XLogRecPtr backupEndPoint;
286 : : static bool backupEndRequired = false;
287 : :
288 : : /*
289 : : * Have we reached a consistent database state? In crash recovery, we have
290 : : * to replay all the WAL, so reachedConsistency is never set. During archive
291 : : * recovery, the database is consistent once minRecoveryPoint is reached.
292 : : *
293 : : * Consistent state means that the system is internally consistent, all
294 : : * the WAL has been replayed up to a certain point, and importantly, there
295 : : * is no trace of later actions on disk.
296 : : *
297 : : * This flag is used only by the startup process and postmaster. When
298 : : * minRecoveryPoint is reached, the startup process sets it to true and
299 : : * sends a PMSIGNAL_RECOVERY_CONSISTENT signal to the postmaster,
300 : : * which then sets it to true upon receiving the signal.
301 : : */
302 : : bool reachedConsistency = false;
303 : :
304 : : /* Buffers dedicated to consistency checks of size BLCKSZ */
305 : : static char *replay_image_masked = NULL;
306 : : static char *primary_image_masked = NULL;
307 : :
308 : : XLogRecoveryCtlData *XLogRecoveryCtl = NULL;
309 : :
310 : : /*
311 : : * abortedRecPtr is the start pointer of a broken record at end of WAL when
312 : : * recovery completes; missingContrecPtr is the location of the first
313 : : * contrecord that went missing. See CreateOverwriteContrecordRecord for
314 : : * details.
315 : : */
316 : : static XLogRecPtr abortedRecPtr;
317 : : static XLogRecPtr missingContrecPtr;
318 : :
319 : : /*
320 : : * if recoveryStopsBefore/After returns true, it saves information of the stop
321 : : * point here
322 : : */
323 : : static TransactionId recoveryStopXid;
324 : : static TimestampTz recoveryStopTime;
325 : : static XLogRecPtr recoveryStopLSN;
326 : : static char recoveryStopName[MAXFNAMELEN];
327 : : static bool recoveryStopAfter;
328 : :
329 : : /* prototypes for local functions */
330 : : static void ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI);
331 : :
332 : : static void EnableStandbyMode(void);
333 : : static void readRecoverySignalFile(void);
334 : : static void validateRecoveryParameters(void);
335 : : static bool read_backup_label(XLogRecPtr *checkPointLoc,
336 : : TimeLineID *backupLabelTLI,
337 : : bool *backupEndRequired, bool *backupFromStandby);
338 : : static bool read_tablespace_map(List **tablespaces);
339 : :
340 : : static void xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI);
341 : : static void CheckRecoveryConsistency(void);
342 : : static void rm_redo_error_callback(void *arg);
343 : : #ifdef WAL_DEBUG
344 : : static void xlog_outrec(StringInfo buf, XLogReaderState *record);
345 : : #endif
346 : : static void xlog_block_info(StringInfo buf, XLogReaderState *record);
347 : : static void checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI,
348 : : TimeLineID prevTLI, TimeLineID replayTLI);
349 : : static bool getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime);
350 : : static void verifyBackupPageConsistency(XLogReaderState *record);
351 : :
352 : : static bool recoveryStopsBefore(XLogReaderState *record);
353 : : static bool recoveryStopsAfter(XLogReaderState *record);
354 : : static char *getRecoveryStopReason(void);
355 : : static void recoveryPausesHere(bool endOfRecovery);
356 : : static bool recoveryApplyDelay(XLogReaderState *record);
357 : : static void ConfirmRecoveryPaused(void);
358 : :
359 : : static XLogRecord *ReadRecord(XLogPrefetcher *xlogprefetcher,
360 : : int emode, bool fetching_ckpt,
361 : : TimeLineID replayTLI);
362 : :
363 : : static int XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr,
364 : : int reqLen, XLogRecPtr targetRecPtr, char *readBuf);
365 : : static XLogPageReadResult WaitForWALToBecomeAvailable(XLogRecPtr RecPtr,
366 : : bool randAccess,
367 : : bool fetching_ckpt,
368 : : XLogRecPtr tliRecPtr,
369 : : TimeLineID replayTLI,
370 : : XLogRecPtr replayLSN,
371 : : bool nonblocking);
372 : : static int emode_for_corrupt_record(int emode, XLogRecPtr RecPtr);
373 : : static XLogRecord *ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher,
374 : : XLogRecPtr RecPtr, TimeLineID replayTLI);
375 : : static bool rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN);
376 : : static int XLogFileRead(XLogSegNo segno, TimeLineID tli,
377 : : XLogSource source, bool notfoundOk);
378 : : static int XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source);
379 : :
380 : : static bool CheckForStandbyTrigger(void);
381 : : static void SetPromoteIsTriggered(void);
382 : : static bool HotStandbyActiveInReplay(void);
383 : :
384 : : static void SetCurrentChunkStartTime(TimestampTz xtime);
385 : : static void SetLatestXTime(TimestampTz xtime);
386 : :
387 : : /*
388 : : * Initialization of shared memory for WAL recovery
389 : : */
390 : : Size
1488 heikki.linnakangas@i 391 :CBC 3297 : XLogRecoveryShmemSize(void)
392 : : {
393 : : Size size;
394 : :
395 : : /* XLogRecoveryCtl */
396 : 3297 : size = sizeof(XLogRecoveryCtlData);
397 : :
398 : 3297 : return size;
399 : : }
400 : :
401 : : void
402 : 1150 : XLogRecoveryShmemInit(void)
403 : : {
404 : : bool found;
405 : :
406 : 1150 : XLogRecoveryCtl = (XLogRecoveryCtlData *)
407 : 1150 : ShmemInitStruct("XLOG Recovery Ctl", XLogRecoveryShmemSize(), &found);
408 [ - + ]: 1150 : if (found)
1488 heikki.linnakangas@i 409 :UBC 0 : return;
1488 heikki.linnakangas@i 410 :CBC 1150 : memset(XLogRecoveryCtl, 0, sizeof(XLogRecoveryCtlData));
411 : :
412 : 1150 : SpinLockInit(&XLogRecoveryCtl->info_lck);
413 : 1150 : InitSharedLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
414 : 1150 : ConditionVariableInit(&XLogRecoveryCtl->recoveryNotPausedCV);
415 : : }
416 : :
417 : : /*
418 : : * A thin wrapper to enable StandbyMode and do other preparatory work as
419 : : * needed.
420 : : */
421 : : static void
1133 rhaas@postgresql.org 422 : 112 : EnableStandbyMode(void)
423 : : {
424 : 112 : StandbyMode = true;
425 : :
426 : : /*
427 : : * To avoid server log bloat, we don't report recovery progress in a
428 : : * standby as it will always be in recovery unless promoted. We disable
429 : : * startup progress timeout in standby mode to avoid calling
430 : : * startup_progress_timeout_handler() unnecessarily.
431 : : */
432 : 112 : disable_startup_progress_timeout();
433 : 112 : }
434 : :
435 : : /*
436 : : * Prepare the system for WAL recovery, if needed.
437 : : *
438 : : * This is called by StartupXLOG() which coordinates the server startup
439 : : * sequence. This function analyzes the control file and the backup label
440 : : * file, if any, and figures out whether we need to perform crash recovery or
441 : : * archive recovery, and how far we need to replay the WAL to reach a
442 : : * consistent state.
443 : : *
444 : : * This doesn't yet change the on-disk state, except for creating the symlinks
445 : : * from table space map file if any, and for fetching WAL files needed to find
446 : : * the checkpoint record. On entry, the caller has already read the control
447 : : * file into memory, and passes it as argument. This function updates it to
448 : : * reflect the recovery state, and the caller is expected to write it back to
449 : : * disk does after initializing other subsystems, but before calling
450 : : * PerformWalRecovery().
451 : : *
452 : : * This initializes some global variables like ArchiveRecoveryRequested, and
453 : : * StandbyModeRequested and InRecovery.
454 : : */
455 : : void
1488 heikki.linnakangas@i 456 : 1004 : InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
457 : : bool *haveBackupLabel_ptr, bool *haveTblspcMap_ptr)
458 : : {
459 : : XLogPageReadPrivate *private;
460 : : struct stat st;
461 : : bool wasShutdown;
462 : : XLogRecord *record;
463 : : DBState dbstate_at_startup;
464 : 1004 : bool haveTblspcMap = false;
465 : 1004 : bool haveBackupLabel = false;
466 : : CheckPoint checkPoint;
467 : 1004 : bool backupFromStandby = false;
468 : :
469 : 1004 : dbstate_at_startup = ControlFile->state;
470 : :
471 : : /*
472 : : * Initialize on the assumption we want to recover to the latest timeline
473 : : * that's active according to pg_control.
474 : : */
475 : 1004 : if (ControlFile->minRecoveryPointTLI >
476 [ + + ]: 1004 : ControlFile->checkPointCopy.ThisTimeLineID)
477 : 2 : recoveryTargetTLI = ControlFile->minRecoveryPointTLI;
478 : : else
479 : 1002 : recoveryTargetTLI = ControlFile->checkPointCopy.ThisTimeLineID;
480 : :
481 : : /*
482 : : * Check for signal files, and if so set up state for offline recovery
483 : : */
484 : 1004 : readRecoverySignalFile();
485 : 1004 : validateRecoveryParameters();
486 : :
487 : : /*
488 : : * Take ownership of the wakeup latch if we're going to sleep during
489 : : * recovery, if required.
490 : : */
491 [ + + ]: 1004 : if (ArchiveRecoveryRequested)
492 : 117 : OwnLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
493 : :
494 : : /*
495 : : * Set the WAL reading processor now, as it will be needed when reading
496 : : * the checkpoint record required (backup_label or not).
497 : : */
95 michael@paquier.xyz 498 :GNC 1004 : private = palloc0_object(XLogPageReadPrivate);
1488 heikki.linnakangas@i 499 :CBC 1004 : xlogreader =
500 : 1004 : XLogReaderAllocate(wal_segment_size, NULL,
501 : 1004 : XL_ROUTINE(.page_read = &XLogPageRead,
502 : : .segment_open = NULL,
503 : : .segment_close = wal_segment_close),
504 : : private);
505 [ - + ]: 1004 : if (!xlogreader)
1488 heikki.linnakangas@i 506 [ # # ]:UBC 0 : ereport(ERROR,
507 : : (errcode(ERRCODE_OUT_OF_MEMORY),
508 : : errmsg("out of memory"),
509 : : errdetail("Failed while allocating a WAL reading processor.")));
1488 heikki.linnakangas@i 510 :CBC 1004 : xlogreader->system_identifier = ControlFile->system_identifier;
511 : :
512 : : /*
513 : : * Set the WAL decode buffer size. This limits how far ahead we can read
514 : : * in the WAL.
515 : : */
1438 tmunro@postgresql.or 516 : 1004 : XLogReaderSetDecodeBuffer(xlogreader, NULL, wal_decode_buffer_size);
517 : :
518 : : /* Create a WAL prefetcher. */
519 : 1004 : xlogprefetcher = XLogPrefetcherAllocate(xlogreader);
520 : :
521 : : /*
522 : : * Allocate two page buffers dedicated to WAL consistency checks. We do
523 : : * it this way, rather than just making static arrays, for two reasons:
524 : : * (1) no need to waste the storage in most instantiations of the backend;
525 : : * (2) a static char array isn't guaranteed to have any particular
526 : : * alignment, whereas palloc() will provide MAXALIGN'd storage.
527 : : */
1488 heikki.linnakangas@i 528 : 1004 : replay_image_masked = (char *) palloc(BLCKSZ);
529 : 1004 : primary_image_masked = (char *) palloc(BLCKSZ);
530 : :
531 : : /*
532 : : * Read the backup_label file. We want to run this part of the recovery
533 : : * process after checking for signal files and after performing validation
534 : : * of the recovery parameters.
535 : : */
536 [ + + ]: 1004 : if (read_backup_label(&CheckPointLoc, &CheckPointTLI, &backupEndRequired,
537 : : &backupFromStandby))
538 : : {
539 : 80 : List *tablespaces = NIL;
540 : :
541 : : /*
542 : : * Archive recovery was requested, and thanks to the backup label
543 : : * file, we know how far we need to replay to reach consistency. Enter
544 : : * archive recovery directly.
545 : : */
546 : 80 : InArchiveRecovery = true;
547 [ + + ]: 80 : if (StandbyModeRequested)
1133 rhaas@postgresql.org 548 : 68 : EnableStandbyMode();
549 : :
550 : : /*
551 : : * Omitting backup_label when creating a new replica, PITR node etc.
552 : : * unfortunately is a common cause of corruption. Logging that
553 : : * backup_label was used makes it a bit easier to exclude that as the
554 : : * cause of observed corruption.
555 : : *
556 : : * Do so before we try to read the checkpoint record (which can fail),
557 : : * as otherwise it can be hard to understand why a checkpoint other
558 : : * than ControlFile->checkPoint is used.
559 : : */
780 michael@paquier.xyz 560 [ + - ]: 80 : ereport(LOG,
561 : : errmsg("starting backup recovery with redo LSN %X/%08X, checkpoint LSN %X/%08X, on timeline ID %u",
562 : : LSN_FORMAT_ARGS(RedoStartLSN),
563 : : LSN_FORMAT_ARGS(CheckPointLoc),
564 : : CheckPointTLI));
565 : :
566 : : /*
567 : : * When a backup_label file is present, we want to roll forward from
568 : : * the checkpoint it identifies, rather than using pg_control.
569 : : */
1334 fujii@postgresql.org 570 : 80 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
571 : : CheckPointTLI);
1488 heikki.linnakangas@i 572 [ + - ]: 80 : if (record != NULL)
573 : : {
574 : 80 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
575 : 80 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
576 [ + + ]: 80 : ereport(DEBUG1,
577 : : errmsg_internal("checkpoint record is at %X/%08X",
578 : : LSN_FORMAT_ARGS(CheckPointLoc)));
579 : 80 : InRecovery = true; /* force recovery even if SHUTDOWNED */
580 : :
581 : : /*
582 : : * Make sure that REDO location exists. This may not be the case
583 : : * if there was a crash during an online backup, which left a
584 : : * backup_label around that references a WAL segment that's
585 : : * already been archived.
586 : : */
587 [ + - ]: 80 : if (checkPoint.redo < CheckPointLoc)
588 : : {
1438 tmunro@postgresql.or 589 : 80 : XLogPrefetcherBeginRead(xlogprefetcher, checkPoint.redo);
590 [ - + ]: 80 : if (!ReadRecord(xlogprefetcher, LOG, false,
591 : : checkPoint.ThisTimeLineID))
1488 heikki.linnakangas@i 592 [ # # ]:UBC 0 : ereport(FATAL,
593 : : errmsg("could not find redo location %X/%08X referenced by checkpoint record at %X/%08X",
594 : : LSN_FORMAT_ARGS(checkPoint.redo), LSN_FORMAT_ARGS(CheckPointLoc)),
595 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
596 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
597 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
598 : : DataDir, DataDir, DataDir, DataDir));
599 : : }
600 : : }
601 : : else
602 : : {
603 [ # # ]: 0 : ereport(FATAL,
604 : : errmsg("could not locate required checkpoint record at %X/%08X",
605 : : LSN_FORMAT_ARGS(CheckPointLoc)),
606 : : errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
607 : : "If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
608 : : "Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
609 : : DataDir, DataDir, DataDir, DataDir));
610 : : wasShutdown = false; /* keep compiler quiet */
611 : : }
612 : :
613 : : /* Read the tablespace_map file if present and create symlinks. */
1488 heikki.linnakangas@i 614 [ + + ]:CBC 80 : if (read_tablespace_map(&tablespaces))
615 : : {
616 : : ListCell *lc;
617 : :
618 [ + - + + : 4 : foreach(lc, tablespaces)
+ + ]
619 : : {
620 : 2 : tablespaceinfo *ti = lfirst(lc);
621 : : char *linkloc;
622 : :
558 michael@paquier.xyz 623 : 2 : linkloc = psprintf("%s/%u", PG_TBLSPC_DIR, ti->oid);
624 : :
625 : : /*
626 : : * Remove the existing symlink if any and Create the symlink
627 : : * under PGDATA.
628 : : */
1488 heikki.linnakangas@i 629 : 2 : remove_tablespace_symlink(linkloc);
630 : :
631 [ - + ]: 2 : if (symlink(ti->path, linkloc) < 0)
1488 heikki.linnakangas@i 632 [ # # ]:UBC 0 : ereport(ERROR,
633 : : (errcode_for_file_access(),
634 : : errmsg("could not create symbolic link \"%s\": %m",
635 : : linkloc)));
636 : :
1488 heikki.linnakangas@i 637 :CBC 2 : pfree(ti->path);
638 : 2 : pfree(ti);
639 : : }
640 : :
641 : : /* tell the caller to delete it later */
642 : 2 : haveTblspcMap = true;
643 : : }
644 : :
645 : : /* tell the caller to delete it later */
646 : 80 : haveBackupLabel = true;
647 : : }
648 : : else
649 : : {
650 : : /* No backup_label file has been found if we are here. */
651 : :
652 : : /*
653 : : * If tablespace_map file is present without backup_label file, there
654 : : * is no use of such file. There is no harm in retaining it, but it
655 : : * is better to get rid of the map file so that we don't have any
656 : : * redundant file in data directory and it will avoid any sort of
657 : : * confusion. It seems prudent though to just rename the file out of
658 : : * the way rather than delete it completely, also we ignore any error
659 : : * that occurs in rename operation as even if map file is present
660 : : * without backup_label file, it is harmless.
661 : : */
662 [ + + ]: 924 : if (stat(TABLESPACE_MAP, &st) == 0)
663 : : {
664 : 1 : unlink(TABLESPACE_MAP_OLD);
665 [ + - ]: 1 : if (durable_rename(TABLESPACE_MAP, TABLESPACE_MAP_OLD, DEBUG1) == 0)
666 [ + - ]: 1 : ereport(LOG,
667 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
668 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
669 : : errdetail("File \"%s\" was renamed to \"%s\".",
670 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
671 : : else
1488 heikki.linnakangas@i 672 [ # # ]:UBC 0 : ereport(LOG,
673 : : (errmsg("ignoring file \"%s\" because no file \"%s\" exists",
674 : : TABLESPACE_MAP, BACKUP_LABEL_FILE),
675 : : errdetail("Could not rename file \"%s\" to \"%s\": %m.",
676 : : TABLESPACE_MAP, TABLESPACE_MAP_OLD)));
677 : : }
678 : :
679 : : /*
680 : : * It's possible that archive recovery was requested, but we don't
681 : : * know how far we need to replay the WAL before we reach consistency.
682 : : * This can happen for example if a base backup is taken from a
683 : : * running server using an atomic filesystem snapshot, without calling
684 : : * pg_backup_start/stop. Or if you just kill a running primary server
685 : : * and put it into archive recovery by creating a recovery signal
686 : : * file.
687 : : *
688 : : * Our strategy in that case is to perform crash recovery first,
689 : : * replaying all the WAL present in pg_wal, and only enter archive
690 : : * recovery after that.
691 : : *
692 : : * But usually we already know how far we need to replay the WAL (up
693 : : * to minRecoveryPoint, up to backupEndPoint, or until we see an
694 : : * end-of-backup record), and we can enter archive recovery directly.
695 : : */
1488 heikki.linnakangas@i 696 [ + + ]:CBC 924 : if (ArchiveRecoveryRequested &&
129 alvherre@kurilemu.de 697 [ + + ]:GNC 44 : (XLogRecPtrIsValid(ControlFile->minRecoveryPoint) ||
1488 heikki.linnakangas@i 698 [ + - ]:CBC 9 : ControlFile->backupEndRequired ||
129 alvherre@kurilemu.de 699 [ + - ]:GNC 9 : XLogRecPtrIsValid(ControlFile->backupEndPoint) ||
1488 heikki.linnakangas@i 700 [ + + ]:CBC 9 : ControlFile->state == DB_SHUTDOWNED))
701 : : {
702 : 43 : InArchiveRecovery = true;
703 [ + - ]: 43 : if (StandbyModeRequested)
1133 rhaas@postgresql.org 704 : 43 : EnableStandbyMode();
705 : : }
706 : :
707 : : /*
708 : : * For the same reason as when starting up with backup_label present,
709 : : * emit a log message when we continue initializing from a base
710 : : * backup.
711 : : */
129 alvherre@kurilemu.de 712 [ - + ]:GNC 924 : if (XLogRecPtrIsValid(ControlFile->backupStartPoint))
780 michael@paquier.xyz 713 [ # # ]:UBC 0 : ereport(LOG,
714 : : errmsg("restarting backup recovery with redo LSN %X/%08X",
715 : : LSN_FORMAT_ARGS(ControlFile->backupStartPoint)));
716 : :
717 : : /* Get the last valid checkpoint record. */
1488 heikki.linnakangas@i 718 :CBC 924 : CheckPointLoc = ControlFile->checkPoint;
719 : 924 : CheckPointTLI = ControlFile->checkPointCopy.ThisTimeLineID;
720 : 924 : RedoStartLSN = ControlFile->checkPointCopy.redo;
721 : 924 : RedoStartTLI = ControlFile->checkPointCopy.ThisTimeLineID;
1334 fujii@postgresql.org 722 : 924 : record = ReadCheckpointRecord(xlogprefetcher, CheckPointLoc,
723 : : CheckPointTLI);
1488 heikki.linnakangas@i 724 [ + + ]: 924 : if (record != NULL)
725 : : {
726 [ + + ]: 923 : ereport(DEBUG1,
727 : : errmsg_internal("checkpoint record is at %X/%08X",
728 : : LSN_FORMAT_ARGS(CheckPointLoc)));
729 : : }
730 : : else
731 : : {
732 : : /*
733 : : * We used to attempt to go back to a secondary checkpoint record
734 : : * here, but only when not in standby mode. We now just fail if we
735 : : * can't read the last checkpoint because this allows us to
736 : : * simplify processing around checkpoints.
737 : : */
5 michael@paquier.xyz 738 [ + - ]:GNC 1 : ereport(FATAL,
739 : : errmsg("could not locate a valid checkpoint record at %X/%08X",
740 : : LSN_FORMAT_ARGS(CheckPointLoc)));
741 : : }
1488 heikki.linnakangas@i 742 :CBC 923 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
743 : 923 : wasShutdown = ((record->xl_info & ~XLR_INFO_MASK) == XLOG_CHECKPOINT_SHUTDOWN);
744 : :
745 : : /* Make sure that REDO location exists. */
89 michael@paquier.xyz 746 [ + + ]: 923 : if (checkPoint.redo < CheckPointLoc)
747 : : {
748 : 44 : XLogPrefetcherBeginRead(xlogprefetcher, checkPoint.redo);
749 [ + + ]: 44 : if (!ReadRecord(xlogprefetcher, LOG, false, checkPoint.ThisTimeLineID))
89 michael@paquier.xyz 750 [ + - ]:GNC 1 : ereport(FATAL,
751 : : errmsg("could not find redo location %X/%08X referenced by checkpoint record at %X/%08X",
752 : : LSN_FORMAT_ARGS(checkPoint.redo), LSN_FORMAT_ARGS(CheckPointLoc)));
753 : : }
754 : : }
755 : :
867 michael@paquier.xyz 756 [ + + ]:CBC 1002 : if (ArchiveRecoveryRequested)
757 : : {
758 [ + + ]: 117 : if (StandbyModeRequested)
759 [ + - ]: 112 : ereport(LOG,
760 : : (errmsg("entering standby mode")));
761 [ - + ]: 5 : else if (recoveryTarget == RECOVERY_TARGET_XID)
867 michael@paquier.xyz 762 [ # # ]:UBC 0 : ereport(LOG,
763 : : (errmsg("starting point-in-time recovery to XID %u",
764 : : recoveryTargetXid)));
867 michael@paquier.xyz 765 [ - + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
867 michael@paquier.xyz 766 [ # # ]:UBC 0 : ereport(LOG,
767 : : (errmsg("starting point-in-time recovery to %s",
768 : : timestamptz_to_str(recoveryTargetTime))));
867 michael@paquier.xyz 769 [ + + ]:CBC 5 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
770 [ + - ]: 3 : ereport(LOG,
771 : : (errmsg("starting point-in-time recovery to \"%s\"",
772 : : recoveryTargetName)));
773 [ - + ]: 2 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
867 michael@paquier.xyz 774 [ # # ]:UBC 0 : ereport(LOG,
775 : : errmsg("starting point-in-time recovery to WAL location (LSN) \"%X/%08X\"",
776 : : LSN_FORMAT_ARGS(recoveryTargetLSN)));
867 michael@paquier.xyz 777 [ - + ]:CBC 2 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
867 michael@paquier.xyz 778 [ # # ]:UBC 0 : ereport(LOG,
779 : : (errmsg("starting point-in-time recovery to earliest consistent point")));
780 : : else
867 michael@paquier.xyz 781 [ + - ]:CBC 2 : ereport(LOG,
782 : : (errmsg("starting archive recovery")));
783 : : }
784 : :
785 : : /*
786 : : * If the location of the checkpoint record is not on the expected
787 : : * timeline in the history of the requested timeline, we cannot proceed:
788 : : * the backup is not part of the history of the requested timeline.
789 : : */
1488 heikki.linnakangas@i 790 [ - + ]: 1002 : Assert(expectedTLEs); /* was initialized by reading checkpoint
791 : : * record */
792 [ - + ]: 1002 : if (tliOfPointInHistory(CheckPointLoc, expectedTLEs) !=
793 : : CheckPointTLI)
794 : : {
795 : : XLogRecPtr switchpoint;
796 : :
797 : : /*
798 : : * tliSwitchPoint will throw an error if the checkpoint's timeline is
799 : : * not in expectedTLEs at all.
800 : : */
388 michael@paquier.xyz 801 :UBC 0 : switchpoint = tliSwitchPoint(CheckPointTLI, expectedTLEs, NULL);
1488 heikki.linnakangas@i 802 [ # # # # ]: 0 : ereport(FATAL,
803 : : (errmsg("requested timeline %u is not a child of this server's history",
804 : : recoveryTargetTLI),
805 : : /* translator: %s is a backup_label file or a pg_control file */
806 : : 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.",
807 : : haveBackupLabel ? "backup_label" : "pg_control",
808 : : LSN_FORMAT_ARGS(CheckPointLoc),
809 : : CheckPointTLI,
810 : : LSN_FORMAT_ARGS(switchpoint))));
811 : : }
812 : :
813 : : /*
814 : : * The min recovery point should be part of the requested timeline's
815 : : * history, too.
816 : : */
129 alvherre@kurilemu.de 817 [ + + ]:GNC 1002 : if (XLogRecPtrIsValid(ControlFile->minRecoveryPoint) &&
1488 heikki.linnakangas@i 818 :CBC 42 : tliOfPointInHistory(ControlFile->minRecoveryPoint - 1, expectedTLEs) !=
819 [ - + ]: 42 : ControlFile->minRecoveryPointTLI)
1488 heikki.linnakangas@i 820 [ # # ]:UBC 0 : ereport(FATAL,
821 : : errmsg("requested timeline %u does not contain minimum recovery point %X/%08X on timeline %u",
822 : : recoveryTargetTLI,
823 : : LSN_FORMAT_ARGS(ControlFile->minRecoveryPoint),
824 : : ControlFile->minRecoveryPointTLI));
825 : :
1488 heikki.linnakangas@i 826 [ + + + + ]:CBC 1002 : ereport(DEBUG1,
827 : : errmsg_internal("redo record is at %X/%08X; shutdown %s",
828 : : LSN_FORMAT_ARGS(checkPoint.redo),
829 : : wasShutdown ? "true" : "false"));
830 [ + + ]: 1002 : ereport(DEBUG1,
831 : : (errmsg_internal("next transaction ID: " UINT64_FORMAT "; next OID: %u",
832 : : U64FromFullTransactionId(checkPoint.nextXid),
833 : : checkPoint.nextOid)));
834 [ + + ]: 1002 : ereport(DEBUG1,
835 : : (errmsg_internal("next MultiXactId: %u; next MultiXactOffset: %" PRIu64,
836 : : checkPoint.nextMulti, checkPoint.nextMultiOffset)));
837 [ + + ]: 1002 : ereport(DEBUG1,
838 : : (errmsg_internal("oldest unfrozen transaction ID: %u, in database %u",
839 : : checkPoint.oldestXid, checkPoint.oldestXidDB)));
840 [ + + ]: 1002 : ereport(DEBUG1,
841 : : (errmsg_internal("oldest MultiXactId: %u, in database %u",
842 : : checkPoint.oldestMulti, checkPoint.oldestMultiDB)));
843 [ + + ]: 1002 : ereport(DEBUG1,
844 : : (errmsg_internal("commit timestamp Xid oldest/newest: %u/%u",
845 : : checkPoint.oldestCommitTsXid,
846 : : checkPoint.newestCommitTsXid)));
847 [ - + ]: 1002 : if (!TransactionIdIsNormal(XidFromFullTransactionId(checkPoint.nextXid)))
1488 heikki.linnakangas@i 848 [ # # ]:UBC 0 : ereport(PANIC,
849 : : (errmsg("invalid next transaction ID")));
850 : :
851 : : /* sanity check */
1488 heikki.linnakangas@i 852 [ - + ]:CBC 1002 : if (checkPoint.redo > CheckPointLoc)
1488 heikki.linnakangas@i 853 [ # # ]:UBC 0 : ereport(PANIC,
854 : : (errmsg("invalid redo in checkpoint record")));
855 : :
856 : : /*
857 : : * Check whether we need to force recovery from WAL. If it appears to
858 : : * have been a clean shutdown and we did not have a recovery signal file,
859 : : * then assume no recovery needed.
860 : : */
1488 heikki.linnakangas@i 861 [ + + ]:CBC 1002 : if (checkPoint.redo < CheckPointLoc)
862 : : {
863 [ - + ]: 123 : if (wasShutdown)
1488 heikki.linnakangas@i 864 [ # # ]:UBC 0 : ereport(PANIC,
865 : : (errmsg("invalid redo record in shutdown checkpoint")));
1488 heikki.linnakangas@i 866 :CBC 123 : InRecovery = true;
867 : : }
868 [ + + ]: 879 : else if (ControlFile->state != DB_SHUTDOWNED)
869 : 94 : InRecovery = true;
870 [ + + ]: 785 : else if (ArchiveRecoveryRequested)
871 : : {
872 : : /* force recovery due to presence of recovery signal file */
873 : 8 : InRecovery = true;
874 : : }
875 : :
876 : : /*
877 : : * If recovery is needed, update our in-memory copy of pg_control to show
878 : : * that we are recovering and to show the selected checkpoint as the place
879 : : * we are starting from. We also mark pg_control with any minimum recovery
880 : : * stop point obtained from a backup history file.
881 : : *
882 : : * We don't write the changes to disk yet, though. Only do that after
883 : : * initializing various subsystems.
884 : : */
885 [ + + ]: 1002 : if (InRecovery)
886 : : {
887 [ + + ]: 225 : if (InArchiveRecovery)
888 : : {
889 : 123 : ControlFile->state = DB_IN_ARCHIVE_RECOVERY;
890 : : }
891 : : else
892 : : {
893 [ + - ]: 102 : ereport(LOG,
894 : : (errmsg("database system was not properly shut down; "
895 : : "automatic recovery in progress")));
896 [ + + ]: 102 : if (recoveryTargetTLI > ControlFile->checkPointCopy.ThisTimeLineID)
897 [ + - ]: 2 : ereport(LOG,
898 : : (errmsg("crash recovery starts in timeline %u "
899 : : "and has target timeline %u",
900 : : ControlFile->checkPointCopy.ThisTimeLineID,
901 : : recoveryTargetTLI)));
902 : 102 : ControlFile->state = DB_IN_CRASH_RECOVERY;
903 : : }
904 : 225 : ControlFile->checkPoint = CheckPointLoc;
905 : 225 : ControlFile->checkPointCopy = checkPoint;
906 [ + + ]: 225 : if (InArchiveRecovery)
907 : : {
908 : : /* initialize minRecoveryPoint if not set yet */
909 [ + + ]: 123 : if (ControlFile->minRecoveryPoint < checkPoint.redo)
910 : : {
911 : 83 : ControlFile->minRecoveryPoint = checkPoint.redo;
912 : 83 : ControlFile->minRecoveryPointTLI = checkPoint.ThisTimeLineID;
913 : : }
914 : : }
915 : :
916 : : /*
917 : : * Set backupStartPoint if we're starting recovery from a base backup.
918 : : *
919 : : * Also set backupEndPoint and use minRecoveryPoint as the backup end
920 : : * location if we're starting recovery from a base backup which was
921 : : * taken from a standby. In this case, the database system status in
922 : : * pg_control must indicate that the database was already in recovery.
923 : : * Usually that will be DB_IN_ARCHIVE_RECOVERY but also can be
924 : : * DB_SHUTDOWNED_IN_RECOVERY if recovery previously was interrupted
925 : : * before reaching this point; e.g. because restore_command or
926 : : * primary_conninfo were faulty.
927 : : *
928 : : * Any other state indicates that the backup somehow became corrupted
929 : : * and we can't sensibly continue with recovery.
930 : : */
931 [ + + ]: 225 : if (haveBackupLabel)
932 : : {
933 : 80 : ControlFile->backupStartPoint = checkPoint.redo;
934 : 80 : ControlFile->backupEndRequired = backupEndRequired;
935 : :
936 [ + + ]: 80 : if (backupFromStandby)
937 : : {
938 [ - + - - ]: 5 : if (dbstate_at_startup != DB_IN_ARCHIVE_RECOVERY &&
939 : : dbstate_at_startup != DB_SHUTDOWNED_IN_RECOVERY)
1488 heikki.linnakangas@i 940 [ # # ]:UBC 0 : ereport(FATAL,
941 : : (errmsg("backup_label contains data inconsistent with control file"),
942 : : errhint("This means that the backup is corrupted and you will "
943 : : "have to use another backup for recovery.")));
1488 heikki.linnakangas@i 944 :CBC 5 : ControlFile->backupEndPoint = ControlFile->minRecoveryPoint;
945 : : }
946 : : }
947 : : }
948 : :
949 : : /* remember these, so that we know when we have reached consistency */
950 : 1002 : backupStartPoint = ControlFile->backupStartPoint;
951 : 1002 : backupEndRequired = ControlFile->backupEndRequired;
952 : 1002 : backupEndPoint = ControlFile->backupEndPoint;
953 [ + + ]: 1002 : if (InArchiveRecovery)
954 : : {
955 : 123 : minRecoveryPoint = ControlFile->minRecoveryPoint;
956 : 123 : minRecoveryPointTLI = ControlFile->minRecoveryPointTLI;
957 : : }
958 : : else
959 : : {
960 : 879 : minRecoveryPoint = InvalidXLogRecPtr;
961 : 879 : minRecoveryPointTLI = 0;
962 : : }
963 : :
964 : : /*
965 : : * Start recovery assuming that the final record isn't lost.
966 : : */
967 : 1002 : abortedRecPtr = InvalidXLogRecPtr;
968 : 1002 : missingContrecPtr = InvalidXLogRecPtr;
969 : :
970 : 1002 : *wasShutdown_ptr = wasShutdown;
971 : 1002 : *haveBackupLabel_ptr = haveBackupLabel;
972 : 1002 : *haveTblspcMap_ptr = haveTblspcMap;
973 : 1002 : }
974 : :
975 : : /*
976 : : * See if there are any recovery signal files and if so, set state for
977 : : * recovery.
978 : : *
979 : : * See if there is a recovery command file (recovery.conf), and if so
980 : : * throw an ERROR since as of PG12 we no longer recognize that.
981 : : */
982 : : static void
983 : 1004 : readRecoverySignalFile(void)
984 : : {
985 : : struct stat stat_buf;
986 : :
987 [ + + ]: 1004 : if (IsBootstrapProcessingMode())
988 : 887 : return;
989 : :
990 : : /*
991 : : * Check for old recovery API file: recovery.conf
992 : : */
993 [ - + ]: 953 : if (stat(RECOVERY_COMMAND_FILE, &stat_buf) == 0)
1488 heikki.linnakangas@i 994 [ # # ]:UBC 0 : ereport(FATAL,
995 : : (errcode_for_file_access(),
996 : : errmsg("using recovery command file \"%s\" is not supported",
997 : : RECOVERY_COMMAND_FILE)));
998 : :
999 : : /*
1000 : : * Remove unused .done file, if present. Ignore if absent.
1001 : : */
1488 heikki.linnakangas@i 1002 :CBC 953 : unlink(RECOVERY_COMMAND_DONE);
1003 : :
1004 : : /*
1005 : : * Check for recovery signal files and if found, fsync them since they
1006 : : * represent server state information. We don't sweat too much about the
1007 : : * possibility of fsync failure, however.
1008 : : */
1009 [ + + ]: 953 : if (stat(STANDBY_SIGNAL_FILE, &stat_buf) == 0)
1010 : : {
1011 : : int fd;
1012 : :
1013 : 112 : fd = BasicOpenFilePerm(STANDBY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1014 : : S_IRUSR | S_IWUSR);
1015 [ + - ]: 112 : if (fd >= 0)
1016 : : {
1017 : 112 : (void) pg_fsync(fd);
1018 : 112 : close(fd);
1019 : : }
1020 : 112 : standby_signal_file_found = true;
1021 : : }
1022 : :
27 fujii@postgresql.org 1023 [ + + ]:GNC 953 : if (stat(RECOVERY_SIGNAL_FILE, &stat_buf) == 0)
1024 : : {
1025 : : int fd;
1026 : :
1488 heikki.linnakangas@i 1027 :CBC 6 : fd = BasicOpenFilePerm(RECOVERY_SIGNAL_FILE, O_RDWR | PG_BINARY,
1028 : : S_IRUSR | S_IWUSR);
1029 [ + - ]: 6 : if (fd >= 0)
1030 : : {
1031 : 6 : (void) pg_fsync(fd);
1032 : 6 : close(fd);
1033 : : }
1034 : 6 : recovery_signal_file_found = true;
1035 : : }
1036 : :
1037 : : /*
1038 : : * If both signal files are present, standby signal file takes precedence.
1039 : : * If neither is present then we won't enter archive recovery.
1040 : : */
1041 : 953 : StandbyModeRequested = false;
1042 : 953 : ArchiveRecoveryRequested = false;
1043 [ + + ]: 953 : if (standby_signal_file_found)
1044 : : {
1045 : 112 : StandbyModeRequested = true;
1046 : 112 : ArchiveRecoveryRequested = true;
1047 : : }
1048 [ + + ]: 841 : else if (recovery_signal_file_found)
1049 : : {
1050 : 5 : StandbyModeRequested = false;
1051 : 5 : ArchiveRecoveryRequested = true;
1052 : : }
1053 : : else
1054 : 836 : return;
1055 : :
1056 : : /*
1057 : : * We don't support standby mode in standalone backends; that requires
1058 : : * other processes such as the WAL receiver to be alive.
1059 : : */
1060 [ + + - + ]: 117 : if (StandbyModeRequested && !IsUnderPostmaster)
1488 heikki.linnakangas@i 1061 [ # # ]:UBC 0 : ereport(FATAL,
1062 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1063 : : errmsg("standby mode is not supported by single-user servers")));
1064 : : }
1065 : :
1066 : : static void
1488 heikki.linnakangas@i 1067 :CBC 1004 : validateRecoveryParameters(void)
1068 : : {
1069 [ + + ]: 1004 : if (!ArchiveRecoveryRequested)
1070 : 887 : return;
1071 : :
1072 : : /*
1073 : : * Check for compulsory parameters
1074 : : */
1075 [ + + ]: 117 : if (StandbyModeRequested)
1076 : : {
1077 [ + - + + ]: 112 : if ((PrimaryConnInfo == NULL || strcmp(PrimaryConnInfo, "") == 0) &&
1078 [ + - + + ]: 11 : (recoveryRestoreCommand == NULL || strcmp(recoveryRestoreCommand, "") == 0))
1079 [ + - ]: 2 : ereport(WARNING,
1080 : : (errmsg("specified neither \"primary_conninfo\" nor \"restore_command\""),
1081 : : errhint("The database server will regularly poll the pg_wal subdirectory to check for files placed there.")));
1082 : : }
1083 : : else
1084 : : {
1085 [ + - ]: 5 : if (recoveryRestoreCommand == NULL ||
1086 [ - + ]: 5 : strcmp(recoveryRestoreCommand, "") == 0)
1488 heikki.linnakangas@i 1087 [ # # ]:UBC 0 : ereport(FATAL,
1088 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1089 : : errmsg("must specify \"restore_command\" when standby mode is not enabled")));
1090 : : }
1091 : :
1092 : : /*
1093 : : * Override any inconsistent requests. Note that this is a change of
1094 : : * behaviour in 9.5; prior to this we simply ignored a request to pause if
1095 : : * hot_standby = off, which was surprising behaviour.
1096 : : */
1488 heikki.linnakangas@i 1097 [ + + ]:CBC 117 : if (recoveryTargetAction == RECOVERY_TARGET_ACTION_PAUSE &&
1098 [ + + ]: 110 : !EnableHotStandby)
1099 : 3 : recoveryTargetAction = RECOVERY_TARGET_ACTION_SHUTDOWN;
1100 : :
1101 : : /*
1102 : : * Final parsing of recovery_target_time string; see also
1103 : : * check_recovery_target_time().
1104 : : */
1105 [ - + ]: 117 : if (recoveryTarget == RECOVERY_TARGET_TIME)
1106 : : {
1488 heikki.linnakangas@i 1107 :UBC 0 : recoveryTargetTime = DatumGetTimestampTz(DirectFunctionCall3(timestamptz_in,
1108 : : CStringGetDatum(recovery_target_time_string),
1109 : : ObjectIdGetDatum(InvalidOid),
1110 : : Int32GetDatum(-1)));
1111 : : }
1112 : :
1113 : : /*
1114 : : * If user specified recovery_target_timeline, validate it or compute the
1115 : : * "latest" value. We can't do this until after we've gotten the restore
1116 : : * command and set InArchiveRecovery, because we need to fetch timeline
1117 : : * history files from the archive.
1118 : : */
1488 heikki.linnakangas@i 1119 [ - + ]:CBC 117 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1120 : : {
1488 heikki.linnakangas@i 1121 :UBC 0 : TimeLineID rtli = recoveryTargetTLIRequested;
1122 : :
1123 : : /* Timeline 1 does not have a history file, all else should */
1124 [ # # # # ]: 0 : if (rtli != 1 && !existsTimeLineHistory(rtli))
1125 [ # # ]: 0 : ereport(FATAL,
1126 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1127 : : errmsg("recovery target timeline %u does not exist",
1128 : : rtli)));
1129 : 0 : recoveryTargetTLI = rtli;
1130 : : }
1488 heikki.linnakangas@i 1131 [ + - ]:CBC 117 : else if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
1132 : : {
1133 : : /* We start the "latest" search from pg_control's timeline */
1134 : 117 : recoveryTargetTLI = findNewestTimeLine(recoveryTargetTLI);
1135 : : }
1136 : : else
1137 : : {
1138 : : /*
1139 : : * else we just use the recoveryTargetTLI as already read from
1140 : : * ControlFile
1141 : : */
1488 heikki.linnakangas@i 1142 [ # # ]:UBC 0 : Assert(recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_CONTROLFILE);
1143 : : }
1144 : : }
1145 : :
1146 : : /*
1147 : : * read_backup_label: check to see if a backup_label file is present
1148 : : *
1149 : : * If we see a backup_label during recovery, we assume that we are recovering
1150 : : * from a backup dump file, and we therefore roll forward from the checkpoint
1151 : : * identified by the label file, NOT what pg_control says. This avoids the
1152 : : * problem that pg_control might have been archived one or more checkpoints
1153 : : * later than the start of the dump, and so if we rely on it as the start
1154 : : * point, we will fail to restore a consistent database state.
1155 : : *
1156 : : * Returns true if a backup_label was found (and fills the checkpoint
1157 : : * location and TLI into *checkPointLoc and *backupLabelTLI, respectively);
1158 : : * returns false if not. If this backup_label came from a streamed backup,
1159 : : * *backupEndRequired is set to true. If this backup_label was created during
1160 : : * recovery, *backupFromStandby is set to true.
1161 : : *
1162 : : * Also sets the global variables RedoStartLSN and RedoStartTLI with the LSN
1163 : : * and TLI read from the backup file.
1164 : : */
1165 : : static bool
1488 heikki.linnakangas@i 1166 :CBC 1004 : read_backup_label(XLogRecPtr *checkPointLoc, TimeLineID *backupLabelTLI,
1167 : : bool *backupEndRequired, bool *backupFromStandby)
1168 : : {
1169 : : char startxlogfilename[MAXFNAMELEN];
1170 : : TimeLineID tli_from_walseg,
1171 : : tli_from_file;
1172 : : FILE *lfp;
1173 : : char ch;
1174 : : char backuptype[20];
1175 : : char backupfrom[20];
1176 : : char backuplabel[MAXPGPATH];
1177 : : char backuptime[128];
1178 : : uint32 hi,
1179 : : lo;
1180 : :
1181 : : /* suppress possible uninitialized-variable warnings */
1182 : 1004 : *checkPointLoc = InvalidXLogRecPtr;
1183 : 1004 : *backupLabelTLI = 0;
1184 : 1004 : *backupEndRequired = false;
1185 : 1004 : *backupFromStandby = false;
1186 : :
1187 : : /*
1188 : : * See if label file is present
1189 : : */
1190 : 1004 : lfp = AllocateFile(BACKUP_LABEL_FILE, "r");
1191 [ + + ]: 1004 : if (!lfp)
1192 : : {
1193 [ - + ]: 924 : if (errno != ENOENT)
1488 heikki.linnakangas@i 1194 [ # # ]:UBC 0 : ereport(FATAL,
1195 : : (errcode_for_file_access(),
1196 : : errmsg("could not read file \"%s\": %m",
1197 : : BACKUP_LABEL_FILE)));
1488 heikki.linnakangas@i 1198 :CBC 924 : return false; /* it's not there, all is fine */
1199 : : }
1200 : :
1201 : : /*
1202 : : * Read and parse the START WAL LOCATION and CHECKPOINT lines (this code
1203 : : * is pretty crude, but we are not expecting any variability in the file
1204 : : * format).
1205 : : */
251 alvherre@kurilemu.de 1206 [ + - ]:GNC 80 : if (fscanf(lfp, "START WAL LOCATION: %X/%08X (file %08X%16s)%c",
1488 heikki.linnakangas@i 1207 [ - + ]:CBC 80 : &hi, &lo, &tli_from_walseg, startxlogfilename, &ch) != 5 || ch != '\n')
1488 heikki.linnakangas@i 1208 [ # # ]:UBC 0 : ereport(FATAL,
1209 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1210 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1488 heikki.linnakangas@i 1211 :CBC 80 : RedoStartLSN = ((uint64) hi) << 32 | lo;
1212 : 80 : RedoStartTLI = tli_from_walseg;
251 alvherre@kurilemu.de 1213 [ + - ]:GNC 80 : if (fscanf(lfp, "CHECKPOINT LOCATION: %X/%08X%c",
1488 heikki.linnakangas@i 1214 [ - + ]:CBC 80 : &hi, &lo, &ch) != 3 || ch != '\n')
1488 heikki.linnakangas@i 1215 [ # # ]:UBC 0 : ereport(FATAL,
1216 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1217 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
1488 heikki.linnakangas@i 1218 :CBC 80 : *checkPointLoc = ((uint64) hi) << 32 | lo;
1219 : 80 : *backupLabelTLI = tli_from_walseg;
1220 : :
1221 : : /*
1222 : : * BACKUP METHOD lets us know if this was a typical backup ("streamed",
1223 : : * which could mean either pg_basebackup or the pg_backup_start/stop
1224 : : * method was used) or if this label came from somewhere else (the only
1225 : : * other option today being from pg_rewind). If this was a streamed
1226 : : * backup then we know that we need to play through until we get to the
1227 : : * end of the WAL which was generated during the backup (at which point we
1228 : : * will have reached consistency and backupEndRequired will be reset to be
1229 : : * false).
1230 : : */
1231 [ + - ]: 80 : if (fscanf(lfp, "BACKUP METHOD: %19s\n", backuptype) == 1)
1232 : : {
1233 [ + + ]: 80 : if (strcmp(backuptype, "streamed") == 0)
1234 : 79 : *backupEndRequired = true;
1235 : : }
1236 : :
1237 : : /*
1238 : : * BACKUP FROM lets us know if this was from a primary or a standby. If
1239 : : * it was from a standby, we'll double-check that the control file state
1240 : : * matches that of a standby.
1241 : : */
1242 [ + - ]: 80 : if (fscanf(lfp, "BACKUP FROM: %19s\n", backupfrom) == 1)
1243 : : {
1244 [ + + ]: 80 : if (strcmp(backupfrom, "standby") == 0)
1245 : 5 : *backupFromStandby = true;
1246 : : }
1247 : :
1248 : : /*
1249 : : * Parse START TIME and LABEL. Those are not mandatory fields for recovery
1250 : : * but checking for their presence is useful for debugging and the next
1251 : : * sanity checks. Cope also with the fact that the result buffers have a
1252 : : * pre-allocated size, hence if the backup_label file has been generated
1253 : : * with strings longer than the maximum assumed here an incorrect parsing
1254 : : * happens. That's fine as only minor consistency checks are done
1255 : : * afterwards.
1256 : : */
1257 [ + - ]: 80 : if (fscanf(lfp, "START TIME: %127[^\n]\n", backuptime) == 1)
1258 [ + + ]: 80 : ereport(DEBUG1,
1259 : : (errmsg_internal("backup time %s in file \"%s\"",
1260 : : backuptime, BACKUP_LABEL_FILE)));
1261 : :
1262 [ + + ]: 80 : if (fscanf(lfp, "LABEL: %1023[^\n]\n", backuplabel) == 1)
1263 [ + + ]: 79 : ereport(DEBUG1,
1264 : : (errmsg_internal("backup label %s in file \"%s\"",
1265 : : backuplabel, BACKUP_LABEL_FILE)));
1266 : :
1267 : : /*
1268 : : * START TIMELINE is new as of 11. Its parsing is not mandatory, still use
1269 : : * it as a sanity check if present.
1270 : : */
1271 [ + + ]: 80 : if (fscanf(lfp, "START TIMELINE: %u\n", &tli_from_file) == 1)
1272 : : {
1273 [ - + ]: 79 : if (tli_from_walseg != tli_from_file)
1488 heikki.linnakangas@i 1274 [ # # ]:UBC 0 : ereport(FATAL,
1275 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1276 : : errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE),
1277 : : errdetail("Timeline ID parsed is %u, but expected %u.",
1278 : : tli_from_file, tli_from_walseg)));
1279 : :
1488 heikki.linnakangas@i 1280 [ + + ]:CBC 79 : ereport(DEBUG1,
1281 : : (errmsg_internal("backup timeline %u in file \"%s\"",
1282 : : tli_from_file, BACKUP_LABEL_FILE)));
1283 : : }
1284 : :
251 alvherre@kurilemu.de 1285 [ - + ]:GNC 80 : if (fscanf(lfp, "INCREMENTAL FROM LSN: %X/%08X\n", &hi, &lo) > 0)
816 rhaas@postgresql.org 1286 [ # # ]:UBC 0 : ereport(FATAL,
1287 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1288 : : errmsg("this is an incremental backup, not a data directory"),
1289 : : errhint("Use pg_combinebackup to reconstruct a valid data directory.")));
1290 : :
1488 heikki.linnakangas@i 1291 [ + - - + ]:CBC 80 : if (ferror(lfp) || FreeFile(lfp))
1488 heikki.linnakangas@i 1292 [ # # ]:UBC 0 : ereport(FATAL,
1293 : : (errcode_for_file_access(),
1294 : : errmsg("could not read file \"%s\": %m",
1295 : : BACKUP_LABEL_FILE)));
1296 : :
1488 heikki.linnakangas@i 1297 :CBC 80 : return true;
1298 : : }
1299 : :
1300 : : /*
1301 : : * read_tablespace_map: check to see if a tablespace_map file is present
1302 : : *
1303 : : * If we see a tablespace_map file during recovery, we assume that we are
1304 : : * recovering from a backup dump file, and we therefore need to create symlinks
1305 : : * as per the information present in tablespace_map file.
1306 : : *
1307 : : * Returns true if a tablespace_map file was found (and fills *tablespaces
1308 : : * with a tablespaceinfo struct for each tablespace listed in the file);
1309 : : * returns false if not.
1310 : : */
1311 : : static bool
1312 : 80 : read_tablespace_map(List **tablespaces)
1313 : : {
1314 : : tablespaceinfo *ti;
1315 : : FILE *lfp;
1316 : : char str[MAXPGPATH];
1317 : : int ch,
1318 : : i,
1319 : : n;
1320 : : bool was_backslash;
1321 : :
1322 : : /*
1323 : : * See if tablespace_map file is present
1324 : : */
1325 : 80 : lfp = AllocateFile(TABLESPACE_MAP, "r");
1326 [ + + ]: 80 : if (!lfp)
1327 : : {
1328 [ - + ]: 78 : if (errno != ENOENT)
1488 heikki.linnakangas@i 1329 [ # # ]:UBC 0 : ereport(FATAL,
1330 : : (errcode_for_file_access(),
1331 : : errmsg("could not read file \"%s\": %m",
1332 : : TABLESPACE_MAP)));
1488 heikki.linnakangas@i 1333 :CBC 78 : return false; /* it's not there, all is fine */
1334 : : }
1335 : :
1336 : : /*
1337 : : * Read and parse the link name and path lines from tablespace_map file
1338 : : * (this code is pretty crude, but we are not expecting any variability in
1339 : : * the file format). De-escape any backslashes that were inserted.
1340 : : */
1341 : 2 : i = 0;
1342 : 2 : was_backslash = false;
1343 [ + + ]: 77 : while ((ch = fgetc(lfp)) != EOF)
1344 : : {
1345 [ + - + + : 75 : if (!was_backslash && (ch == '\n' || ch == '\r'))
- + ]
1346 : 2 : {
1347 : : char *endp;
1348 : :
1349 [ - + ]: 2 : if (i == 0)
1488 heikki.linnakangas@i 1350 :UBC 0 : continue; /* \r immediately followed by \n */
1351 : :
1352 : : /*
1353 : : * The de-escaped line should contain an OID followed by exactly
1354 : : * one space followed by a path. The path might start with
1355 : : * spaces, so don't be too liberal about parsing.
1356 : : */
1488 heikki.linnakangas@i 1357 :CBC 2 : str[i] = '\0';
1358 : 2 : n = 0;
1359 [ + - + + ]: 12 : while (str[n] && str[n] != ' ')
1360 : 10 : n++;
1361 [ + - - + ]: 2 : if (n < 1 || n >= i - 1)
1488 heikki.linnakangas@i 1362 [ # # ]:UBC 0 : ereport(FATAL,
1363 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1364 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1488 heikki.linnakangas@i 1365 :CBC 2 : str[n++] = '\0';
1366 : :
95 michael@paquier.xyz 1367 :GNC 2 : ti = palloc0_object(tablespaceinfo);
874 rhaas@postgresql.org 1368 :CBC 2 : errno = 0;
1369 : 2 : ti->oid = strtoul(str, &endp, 10);
1370 [ + - + - : 2 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
874 rhaas@postgresql.org 1371 [ # # ]:UBC 0 : ereport(FATAL,
1372 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1373 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1488 heikki.linnakangas@i 1374 :CBC 2 : ti->path = pstrdup(str + n);
1375 : 2 : *tablespaces = lappend(*tablespaces, ti);
1376 : :
1377 : 2 : i = 0;
1378 : 2 : continue;
1379 : : }
1380 [ + - - + ]: 73 : else if (!was_backslash && ch == '\\')
1488 heikki.linnakangas@i 1381 :UBC 0 : was_backslash = true;
1382 : : else
1383 : : {
1488 heikki.linnakangas@i 1384 [ + - ]:CBC 73 : if (i < sizeof(str) - 1)
1385 : 73 : str[i++] = ch;
1386 : 73 : was_backslash = false;
1387 : : }
1388 : : }
1389 : :
1390 [ + - - + ]: 2 : if (i != 0 || was_backslash) /* last line not terminated? */
1488 heikki.linnakangas@i 1391 [ # # ]:UBC 0 : ereport(FATAL,
1392 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1393 : : errmsg("invalid data in file \"%s\"", TABLESPACE_MAP)));
1394 : :
1488 heikki.linnakangas@i 1395 [ + - - + ]:CBC 2 : if (ferror(lfp) || FreeFile(lfp))
1488 heikki.linnakangas@i 1396 [ # # ]:UBC 0 : ereport(FATAL,
1397 : : (errcode_for_file_access(),
1398 : : errmsg("could not read file \"%s\": %m",
1399 : : TABLESPACE_MAP)));
1400 : :
1488 heikki.linnakangas@i 1401 :CBC 2 : return true;
1402 : : }
1403 : :
1404 : : /*
1405 : : * Finish WAL recovery.
1406 : : *
1407 : : * This does not close the 'xlogreader' yet, because in some cases the caller
1408 : : * still wants to re-read the last checkpoint record by calling
1409 : : * ReadCheckpointRecord().
1410 : : *
1411 : : * Returns the position of the last valid or applied record, after which new
1412 : : * WAL should be appended, information about why recovery was ended, and some
1413 : : * other things. See the EndOfWalRecoveryInfo struct for details.
1414 : : */
1415 : : EndOfWalRecoveryInfo *
1416 : 939 : FinishWalRecovery(void)
1417 : : {
95 michael@paquier.xyz 1418 :GNC 939 : EndOfWalRecoveryInfo *result = palloc_object(EndOfWalRecoveryInfo);
1419 : : XLogRecPtr lastRec;
1420 : : TimeLineID lastRecTLI;
1421 : : XLogRecPtr endOfLog;
1422 : :
1423 : : /*
1424 : : * Kill WAL receiver, if it's still running, before we continue to write
1425 : : * the startup checkpoint and aborted-contrecord records. It will trump
1426 : : * over these records and subsequent ones if it's still alive when we
1427 : : * start writing WAL.
1428 : : */
1488 heikki.linnakangas@i 1429 :CBC 939 : XLogShutdownWalRcv();
1430 : :
1431 : : /*
1432 : : * Shutdown the slot sync worker to drop any temporary slots acquired by
1433 : : * it and to prevent it from keep trying to fetch the failover slots.
1434 : : *
1435 : : * We do not update the 'synced' column in 'pg_replication_slots' system
1436 : : * view from true to false here, as any failed update could leave 'synced'
1437 : : * column false for some slots. This could cause issues during slot sync
1438 : : * after restarting the server as a standby. While updating the 'synced'
1439 : : * column after switching to the new timeline is an option, it does not
1440 : : * simplify the handling for the 'synced' column. Therefore, we retain the
1441 : : * 'synced' column as true after promotion as it may provide useful
1442 : : * information about the slot origin.
1443 : : */
752 akapila@postgresql.o 1444 : 939 : ShutDownSlotSync();
1445 : :
1446 : : /*
1447 : : * We are now done reading the xlog from stream. Turn off streaming
1448 : : * recovery to force fetching the files (which would be required at end of
1449 : : * recovery, e.g., timeline history file) from archive or pg_wal.
1450 : : *
1451 : : * Note that standby mode must be turned off after killing WAL receiver,
1452 : : * i.e., calling XLogShutdownWalRcv().
1453 : : */
1488 heikki.linnakangas@i 1454 [ - + ]: 939 : Assert(!WalRcvStreaming());
1455 : 939 : StandbyMode = false;
1456 : :
1457 : : /*
1458 : : * Determine where to start writing WAL next.
1459 : : *
1460 : : * Re-fetch the last valid or last applied record, so we can identify the
1461 : : * exact endpoint of what we consider the valid portion of WAL. There may
1462 : : * be an incomplete continuation record after that, in which case
1463 : : * 'abortedRecPtr' and 'missingContrecPtr' are set and the caller will
1464 : : * write a special OVERWRITE_CONTRECORD message to mark that the rest of
1465 : : * it is intentionally missing. See CreateOverwriteContrecordRecord().
1466 : : *
1467 : : * An important side-effect of this is to load the last page into
1468 : : * xlogreader. The caller uses it to initialize the WAL for writing.
1469 : : */
1470 [ + + ]: 939 : if (!InRecovery)
1471 : : {
1472 : 776 : lastRec = CheckPointLoc;
1473 : 776 : lastRecTLI = CheckPointTLI;
1474 : : }
1475 : : else
1476 : : {
1477 : 163 : lastRec = XLogRecoveryCtl->lastReplayedReadRecPtr;
1478 : 163 : lastRecTLI = XLogRecoveryCtl->lastReplayedTLI;
1479 : : }
1438 tmunro@postgresql.or 1480 : 939 : XLogPrefetcherBeginRead(xlogprefetcher, lastRec);
1481 : 939 : (void) ReadRecord(xlogprefetcher, PANIC, false, lastRecTLI);
1488 heikki.linnakangas@i 1482 : 939 : endOfLog = xlogreader->EndRecPtr;
1483 : :
1484 : : /*
1485 : : * Remember the TLI in the filename of the XLOG segment containing the
1486 : : * end-of-log. It could be different from the timeline that endOfLog
1487 : : * nominally belongs to, if there was a timeline switch in that segment,
1488 : : * and we were reading the old WAL from a segment belonging to a higher
1489 : : * timeline.
1490 : : */
1491 : 939 : result->endOfLogTLI = xlogreader->seg.ws_tli;
1492 : :
1493 [ + + ]: 939 : if (ArchiveRecoveryRequested)
1494 : : {
1495 : : /*
1496 : : * We are no longer in archive recovery state.
1497 : : *
1498 : : * We are now done reading the old WAL. Turn off archive fetching if
1499 : : * it was active.
1500 : : */
1501 [ - + ]: 55 : Assert(InArchiveRecovery);
1502 : 55 : InArchiveRecovery = false;
1503 : :
1504 : : /*
1505 : : * If the ending log segment is still open, close it (to avoid
1506 : : * problems on Windows with trying to rename or delete an open file).
1507 : : */
1508 [ + - ]: 55 : if (readFile >= 0)
1509 : : {
1510 : 55 : close(readFile);
1511 : 55 : readFile = -1;
1512 : : }
1513 : : }
1514 : :
1515 : : /*
1516 : : * Copy the last partial block to the caller, for initializing the WAL
1517 : : * buffer for appending new WAL.
1518 : : */
1519 [ + + ]: 939 : if (endOfLog % XLOG_BLCKSZ != 0)
1520 : : {
1521 : : char *page;
1522 : : int len;
1523 : : XLogRecPtr pageBeginPtr;
1524 : :
1525 : 917 : pageBeginPtr = endOfLog - (endOfLog % XLOG_BLCKSZ);
1526 [ - + ]: 917 : Assert(readOff == XLogSegmentOffset(pageBeginPtr, wal_segment_size));
1527 : :
1528 : : /* Copy the valid part of the last block */
1529 : 917 : len = endOfLog % XLOG_BLCKSZ;
1530 : 917 : page = palloc(len);
1531 : 917 : memcpy(page, xlogreader->readBuf, len);
1532 : :
1533 : 917 : result->lastPageBeginPtr = pageBeginPtr;
1534 : 917 : result->lastPage = page;
1535 : : }
1536 : : else
1537 : : {
1538 : : /* There is no partial block to copy. */
1539 : 22 : result->lastPageBeginPtr = endOfLog;
1540 : 22 : result->lastPage = NULL;
1541 : : }
1542 : :
1543 : : /*
1544 : : * Create a comment for the history file to explain why and where timeline
1545 : : * changed.
1546 : : */
1547 : 939 : result->recoveryStopReason = getRecoveryStopReason();
1548 : :
1549 : 939 : result->lastRec = lastRec;
1550 : 939 : result->lastRecTLI = lastRecTLI;
1551 : 939 : result->endOfLog = endOfLog;
1552 : :
1553 : 939 : result->abortedRecPtr = abortedRecPtr;
1554 : 939 : result->missingContrecPtr = missingContrecPtr;
1555 : :
1556 : 939 : result->standby_signal_file_found = standby_signal_file_found;
1557 : 939 : result->recovery_signal_file_found = recovery_signal_file_found;
1558 : :
1559 : 939 : return result;
1560 : : }
1561 : :
1562 : : /*
1563 : : * Clean up the WAL reader and leftovers from restoring WAL from archive
1564 : : */
1565 : : void
1566 : 939 : ShutdownWalRecovery(void)
1567 : : {
1568 : : char recoveryPath[MAXPGPATH];
1569 : :
1570 : : /* Final update of pg_stat_recovery_prefetch. */
1438 tmunro@postgresql.or 1571 : 939 : XLogPrefetcherComputeStats(xlogprefetcher);
1572 : :
1573 : : /* Shut down xlogreader */
1488 heikki.linnakangas@i 1574 [ + + ]: 939 : if (readFile >= 0)
1575 : : {
1576 : 884 : close(readFile);
1577 : 884 : readFile = -1;
1578 : : }
225 tgl@sss.pgh.pa.us 1579 :GNC 939 : pfree(xlogreader->private_data);
1488 heikki.linnakangas@i 1580 :CBC 939 : XLogReaderFree(xlogreader);
1438 tmunro@postgresql.or 1581 : 939 : XLogPrefetcherFree(xlogprefetcher);
1582 : :
1488 heikki.linnakangas@i 1583 [ + + ]: 939 : if (ArchiveRecoveryRequested)
1584 : : {
1585 : : /*
1586 : : * Since there might be a partial WAL segment named RECOVERYXLOG, get
1587 : : * rid of it.
1588 : : */
1589 : 55 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYXLOG");
1590 : 55 : unlink(recoveryPath); /* ignore any error */
1591 : :
1592 : : /* Get rid of any remaining recovered timeline-history file, too */
1593 : 55 : snprintf(recoveryPath, MAXPGPATH, XLOGDIR "/RECOVERYHISTORY");
1594 : 55 : unlink(recoveryPath); /* ignore any error */
1595 : : }
1596 : :
1597 : : /*
1598 : : * We don't need the latch anymore. It's not strictly necessary to disown
1599 : : * it, but let's do it for the sake of tidiness.
1600 : : */
1601 [ + + ]: 939 : if (ArchiveRecoveryRequested)
1602 : 55 : DisownLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
1603 : 939 : }
1604 : :
1605 : : /*
1606 : : * Perform WAL recovery.
1607 : : *
1608 : : * If the system was shut down cleanly, this is never called.
1609 : : */
1610 : : void
1611 : 224 : PerformWalRecovery(void)
1612 : : {
1613 : : XLogRecord *record;
1614 : 224 : bool reachedRecoveryTarget = false;
1615 : : TimeLineID replayTLI;
1616 : :
1617 : : /*
1618 : : * Initialize shared variables for tracking progress of WAL replay, as if
1619 : : * we had just replayed the record before the REDO location (or the
1620 : : * checkpoint record itself, if it's a shutdown checkpoint).
1621 : : */
1622 [ - + ]: 224 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1623 [ + + ]: 224 : if (RedoStartLSN < CheckPointLoc)
1624 : : {
1625 : 122 : XLogRecoveryCtl->lastReplayedReadRecPtr = InvalidXLogRecPtr;
1626 : 122 : XLogRecoveryCtl->lastReplayedEndRecPtr = RedoStartLSN;
1627 : 122 : XLogRecoveryCtl->lastReplayedTLI = RedoStartTLI;
1628 : : }
1629 : : else
1630 : : {
1631 : 102 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
1632 : 102 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
1633 : 102 : XLogRecoveryCtl->lastReplayedTLI = CheckPointTLI;
1634 : : }
1635 : 224 : XLogRecoveryCtl->replayEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
1636 : 224 : XLogRecoveryCtl->replayEndTLI = XLogRecoveryCtl->lastReplayedTLI;
1637 : 224 : XLogRecoveryCtl->recoveryLastXTime = 0;
1638 : 224 : XLogRecoveryCtl->currentChunkStartTime = 0;
1639 : 224 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
1640 : 224 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1641 : :
1642 : : /* Also ensure XLogReceiptTime has a sane value */
1643 : 224 : XLogReceiptTime = GetCurrentTimestamp();
1644 : :
1645 : : /*
1646 : : * Let postmaster know we've started redo now, so that it can launch the
1647 : : * archiver if necessary.
1648 : : */
1649 [ + + ]: 224 : if (IsUnderPostmaster)
1650 : 215 : SendPostmasterSignal(PMSIGNAL_RECOVERY_STARTED);
1651 : :
1652 : : /*
1653 : : * Allow read-only connections immediately if we're consistent already.
1654 : : */
1655 : 224 : CheckRecoveryConsistency();
1656 : :
1657 : : /*
1658 : : * Find the first record that logically follows the checkpoint --- it
1659 : : * might physically precede it, though.
1660 : : */
1661 [ + + ]: 224 : if (RedoStartLSN < CheckPointLoc)
1662 : : {
1663 : : /* back up to find the record */
1664 : 122 : replayTLI = RedoStartTLI;
1438 tmunro@postgresql.or 1665 : 122 : XLogPrefetcherBeginRead(xlogprefetcher, RedoStartLSN);
1666 : 122 : record = ReadRecord(xlogprefetcher, PANIC, false, replayTLI);
1667 : :
1668 : : /*
1669 : : * If a checkpoint record's redo pointer points back to an earlier
1670 : : * LSN, the record at that LSN should be an XLOG_CHECKPOINT_REDO
1671 : : * record.
1672 : : */
878 rhaas@postgresql.org 1673 [ + - ]: 122 : if (record->xl_rmid != RM_XLOG_ID ||
1674 [ - + ]: 122 : (record->xl_info & ~XLR_INFO_MASK) != XLOG_CHECKPOINT_REDO)
878 rhaas@postgresql.org 1675 [ # # ]:UBC 0 : ereport(FATAL,
1676 : : errmsg("unexpected record type found at redo point %X/%08X",
1677 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1678 : : }
1679 : : else
1680 : : {
1681 : : /* just have to read next record after CheckPoint */
1488 heikki.linnakangas@i 1682 [ - + ]:CBC 102 : Assert(xlogreader->ReadRecPtr == CheckPointLoc);
1683 : 102 : replayTLI = CheckPointTLI;
1438 tmunro@postgresql.or 1684 : 102 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1685 : : }
1686 : :
1488 heikki.linnakangas@i 1687 [ + + ]: 224 : if (record != NULL)
1688 : : {
1689 : : TimestampTz xtime;
1690 : : PGRUsage ru0;
1691 : :
1692 : 215 : pg_rusage_init(&ru0);
1693 : :
1694 : 215 : InRedo = true;
1695 : :
1439 jdavis@postgresql.or 1696 : 215 : RmgrStartup();
1697 : :
1488 heikki.linnakangas@i 1698 [ + - ]: 215 : ereport(LOG,
1699 : : errmsg("redo starts at %X/%08X",
1700 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr)));
1701 : :
1702 : : /* Prepare to report progress of the redo phase. */
1703 [ + + ]: 215 : if (!StandbyMode)
1704 : 108 : begin_startup_progress_phase();
1705 : :
1706 : : /*
1707 : : * main redo apply loop
1708 : : */
1709 : : do
1710 : : {
1711 [ + + ]: 2862242 : if (!StandbyMode)
251 alvherre@kurilemu.de 1712 [ - + - - ]:GNC 325628 : ereport_startup_progress("redo in progress, elapsed time: %ld.%02d s, current LSN: %X/%08X",
1713 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr));
1714 : :
1715 : : #ifdef WAL_DEBUG
1716 : : if (XLOG_DEBUG)
1717 : : {
1718 : : StringInfoData buf;
1719 : :
1720 : : initStringInfo(&buf);
1721 : : appendStringInfo(&buf, "REDO @ %X/%08X; LSN %X/%08X: ",
1722 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1723 : : LSN_FORMAT_ARGS(xlogreader->EndRecPtr));
1724 : : xlog_outrec(&buf, xlogreader);
1725 : : appendStringInfoString(&buf, " - ");
1726 : : xlog_outdesc(&buf, xlogreader);
1727 : : elog(LOG, "%s", buf.data);
1728 : : pfree(buf.data);
1729 : : }
1730 : : #endif
1731 : :
1732 : : /* Handle interrupt signals of startup process */
375 heikki.linnakangas@i 1733 :CBC 2862242 : ProcessStartupProcInterrupts();
1734 : :
1735 : : /*
1736 : : * Pause WAL replay, if requested by a hot-standby session via
1737 : : * SetRecoveryPause().
1738 : : *
1739 : : * Note that we intentionally don't take the info_lck spinlock
1740 : : * here. We might therefore read a slightly stale value of the
1741 : : * recoveryPause flag, but it can't be very stale (no worse than
1742 : : * the last spinlock we did acquire). Since a pause request is a
1743 : : * pretty asynchronous thing anyway, possibly responding to it one
1744 : : * WAL record later than we otherwise would is a minor issue, so
1745 : : * it doesn't seem worth adding another spinlock cycle to prevent
1746 : : * that.
1747 : : */
1488 1748 [ - + ]: 2862242 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1749 : : RECOVERY_NOT_PAUSED)
1488 heikki.linnakangas@i 1750 :UBC 0 : recoveryPausesHere(false);
1751 : :
1752 : : /*
1753 : : * Have we reached our recovery target?
1754 : : */
1488 heikki.linnakangas@i 1755 [ + + ]:CBC 2862242 : if (recoveryStopsBefore(xlogreader))
1756 : : {
1757 : 2 : reachedRecoveryTarget = true;
1758 : 2 : break;
1759 : : }
1760 : :
1761 : : /*
1762 : : * If we've been asked to lag the primary, wait on latch until
1763 : : * enough time has passed.
1764 : : */
1765 [ + + ]: 2862240 : if (recoveryApplyDelay(xlogreader))
1766 : : {
1767 : : /*
1768 : : * We test for paused recovery again here. If user sets
1769 : : * delayed apply, it may be because they expect to pause
1770 : : * recovery in case of problems, so we must test again here
1771 : : * otherwise pausing during the delay-wait wouldn't work.
1772 : : */
1488 heikki.linnakangas@i 1773 [ - + ]:GBC 29 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
1774 : : RECOVERY_NOT_PAUSED)
1488 heikki.linnakangas@i 1775 :UBC 0 : recoveryPausesHere(false);
1776 : : }
1777 : :
1778 : : /*
1779 : : * Apply the record
1780 : : */
1488 heikki.linnakangas@i 1781 :CBC 2862240 : ApplyWalRecord(xlogreader, record, &replayTLI);
1782 : :
1783 : : /*
1784 : : * If we replayed an LSN that someone was waiting for then walk
1785 : : * over the shared memory array and set latches to notify the
1786 : : * waiters.
1787 : : */
130 akorotkov@postgresql 1788 [ + - + + ]:GNC 5724476 : if (waitLSNState &&
1789 : 2862238 : (XLogRecoveryCtl->lastReplayedEndRecPtr >=
69 1790 : 2862238 : pg_atomic_read_u64(&waitLSNState->minWaitedLSN[WAIT_LSN_TYPE_STANDBY_REPLAY])))
1791 : 8 : WaitLSNWakeup(WAIT_LSN_TYPE_STANDBY_REPLAY, XLogRecoveryCtl->lastReplayedEndRecPtr);
1792 : :
1793 : : /* Exit loop if we reached inclusive recovery target */
45 akorotkov@postgresql 1794 [ + + ]:CBC 2862238 : if (recoveryStopsAfter(xlogreader))
1795 : : {
1796 : 5 : reachedRecoveryTarget = true;
1797 : 5 : break;
1798 : : }
1799 : :
1800 : : /* Else, try to fetch the next WAL record */
1438 tmunro@postgresql.or 1801 : 2862233 : record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);
1488 heikki.linnakangas@i 1802 [ + + ]: 2862175 : } while (record != NULL);
1803 : :
1804 : : /*
1805 : : * end of main redo apply loop
1806 : : */
1807 : :
1808 [ + + ]: 155 : if (reachedRecoveryTarget)
1809 : : {
1810 [ - + ]: 7 : if (!reachedConsistency)
1488 heikki.linnakangas@i 1811 [ # # ]:UBC 0 : ereport(FATAL,
1812 : : (errmsg("requested recovery stop point is before consistent recovery point")));
1813 : :
1814 : : /*
1815 : : * This is the last point where we can restart recovery with a new
1816 : : * recovery target, if we shutdown and begin again. After this,
1817 : : * Resource Managers may choose to do permanent corrective actions
1818 : : * at end of recovery.
1819 : : */
1488 heikki.linnakangas@i 1820 [ - + + - ]:CBC 7 : switch (recoveryTargetAction)
1821 : : {
1488 heikki.linnakangas@i 1822 :UBC 0 : case RECOVERY_TARGET_ACTION_SHUTDOWN:
1823 : :
1824 : : /*
1825 : : * exit with special return code to request shutdown of
1826 : : * postmaster. Log messages issued from postmaster.
1827 : : */
1828 : 0 : proc_exit(3);
1829 : :
1488 heikki.linnakangas@i 1830 :CBC 1 : case RECOVERY_TARGET_ACTION_PAUSE:
1831 : 1 : SetRecoveryPause(true);
1832 : 1 : recoveryPausesHere(true);
1833 : :
1834 : : /* drop into promote */
1835 : : pg_fallthrough;
1836 : :
1837 : 7 : case RECOVERY_TARGET_ACTION_PROMOTE:
1838 : 7 : break;
1839 : : }
1840 : : }
1841 : :
1439 jdavis@postgresql.or 1842 : 155 : RmgrCleanup();
1843 : :
1488 heikki.linnakangas@i 1844 [ + - ]: 155 : ereport(LOG,
1845 : : errmsg("redo done at %X/%08X system usage: %s",
1846 : : LSN_FORMAT_ARGS(xlogreader->ReadRecPtr),
1847 : : pg_rusage_show(&ru0)));
1848 : 155 : xtime = GetLatestXTime();
1849 [ + + ]: 155 : if (xtime)
1850 [ + - ]: 38 : ereport(LOG,
1851 : : (errmsg("last completed transaction was at log time %s",
1852 : : timestamptz_to_str(xtime))));
1853 : :
1854 : 155 : InRedo = false;
1855 : : }
1856 : : else
1857 : : {
1858 : : /* there are no WAL records following the checkpoint */
1859 [ + - ]: 9 : ereport(LOG,
1860 : : (errmsg("redo is not required")));
1861 : : }
1862 : :
1863 : : /*
1864 : : * This check is intentionally after the above log messages that indicate
1865 : : * how far recovery went.
1866 : : */
1867 [ + + ]: 164 : if (ArchiveRecoveryRequested &&
1868 [ + + ]: 56 : recoveryTarget != RECOVERY_TARGET_UNSET &&
1869 [ + + ]: 8 : !reachedRecoveryTarget)
1870 [ + - ]: 1 : ereport(FATAL,
1871 : : (errcode(ERRCODE_CONFIG_FILE_ERROR),
1872 : : errmsg("recovery ended before configured recovery target was reached")));
1873 : 163 : }
1874 : :
1875 : : /*
1876 : : * Subroutine of PerformWalRecovery, to apply one WAL record.
1877 : : */
1878 : : static void
1879 : 2862240 : ApplyWalRecord(XLogReaderState *xlogreader, XLogRecord *record, TimeLineID *replayTLI)
1880 : : {
1881 : : ErrorContextCallback errcallback;
1882 : 2862240 : bool switchedTLI = false;
1883 : :
1884 : : /* Setup error traceback support for ereport() */
1885 : 2862240 : errcallback.callback = rm_redo_error_callback;
472 peter@eisentraut.org 1886 : 2862240 : errcallback.arg = xlogreader;
1488 heikki.linnakangas@i 1887 : 2862240 : errcallback.previous = error_context_stack;
1888 : 2862240 : error_context_stack = &errcallback;
1889 : :
1890 : : /*
1891 : : * TransamVariables->nextXid must be beyond record's xid.
1892 : : */
1893 : 2862240 : AdvanceNextFullTransactionIdPastXid(record->xl_xid);
1894 : :
1895 : : /*
1896 : : * Before replaying this record, check if this record causes the current
1897 : : * timeline to change. The record is already considered to be part of the
1898 : : * new timeline, so we update replayTLI before replaying it. That's
1899 : : * important so that replayEndTLI, which is recorded as the minimum
1900 : : * recovery point's TLI if recovery stops after this record, is set
1901 : : * correctly.
1902 : : */
1903 [ + + ]: 2862240 : if (record->xl_rmid == RM_XLOG_ID)
1904 : : {
1905 : 107715 : TimeLineID newReplayTLI = *replayTLI;
1906 : 107715 : TimeLineID prevReplayTLI = *replayTLI;
1907 : 107715 : uint8 info = record->xl_info & ~XLR_INFO_MASK;
1908 : :
1909 [ + + ]: 107715 : if (info == XLOG_CHECKPOINT_SHUTDOWN)
1910 : : {
1911 : : CheckPoint checkPoint;
1912 : :
1913 : 42 : memcpy(&checkPoint, XLogRecGetData(xlogreader), sizeof(CheckPoint));
1914 : 42 : newReplayTLI = checkPoint.ThisTimeLineID;
1915 : 42 : prevReplayTLI = checkPoint.PrevTimeLineID;
1916 : : }
1917 [ + + ]: 107673 : else if (info == XLOG_END_OF_RECOVERY)
1918 : : {
1919 : : xl_end_of_recovery xlrec;
1920 : :
1921 : 11 : memcpy(&xlrec, XLogRecGetData(xlogreader), sizeof(xl_end_of_recovery));
1922 : 11 : newReplayTLI = xlrec.ThisTimeLineID;
1923 : 11 : prevReplayTLI = xlrec.PrevTimeLineID;
1924 : : }
1925 : :
1926 [ + + ]: 107715 : if (newReplayTLI != *replayTLI)
1927 : : {
1928 : : /* Check that it's OK to switch to this TLI */
1929 : 12 : checkTimeLineSwitch(xlogreader->EndRecPtr,
1930 : : newReplayTLI, prevReplayTLI, *replayTLI);
1931 : :
1932 : : /* Following WAL records should be run with new TLI */
1933 : 12 : *replayTLI = newReplayTLI;
1934 : 12 : switchedTLI = true;
1935 : : }
1936 : : }
1937 : :
1938 : : /*
1939 : : * Update shared replayEndRecPtr before replaying this record, so that
1940 : : * XLogFlush will update minRecoveryPoint correctly.
1941 : : */
1942 [ + + ]: 2862240 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1943 : 2862240 : XLogRecoveryCtl->replayEndRecPtr = xlogreader->EndRecPtr;
1944 : 2862240 : XLogRecoveryCtl->replayEndTLI = *replayTLI;
1945 : 2862240 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1946 : :
1947 : : /*
1948 : : * If we are attempting to enter Hot Standby mode, process XIDs we see
1949 : : */
1950 [ + + ]: 2862240 : if (standbyState >= STANDBY_INITIALIZED &&
1951 [ + + ]: 2556168 : TransactionIdIsValid(record->xl_xid))
1952 : 2503202 : RecordKnownAssignedTransactionIds(record->xl_xid);
1953 : :
1954 : : /*
1955 : : * Some XLOG record types that are related to recovery are processed
1956 : : * directly here, rather than in xlog_redo()
1957 : : */
1958 [ + + ]: 2862240 : if (record->xl_rmid == RM_XLOG_ID)
1959 : 107715 : xlogrecovery_redo(xlogreader, *replayTLI);
1960 : :
1961 : : /* Now apply the WAL record itself */
1439 jdavis@postgresql.or 1962 : 2862240 : GetRmgr(record->xl_rmid).rm_redo(xlogreader);
1963 : :
1964 : : /*
1965 : : * After redo, check whether the backup pages associated with the WAL
1966 : : * record are consistent with the existing pages. This check is done only
1967 : : * if consistency check is enabled for this record.
1968 : : */
1488 heikki.linnakangas@i 1969 [ + + ]: 2862238 : if ((record->xl_info & XLR_CHECK_CONSISTENCY) != 0)
1970 : 2213510 : verifyBackupPageConsistency(xlogreader);
1971 : :
1972 : : /* Pop the error context stack */
1973 : 2862238 : error_context_stack = errcallback.previous;
1974 : :
1975 : : /*
1976 : : * Update lastReplayedEndRecPtr after this record has been successfully
1977 : : * replayed.
1978 : : */
1979 [ + + ]: 2862238 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
1980 : 2862238 : XLogRecoveryCtl->lastReplayedReadRecPtr = xlogreader->ReadRecPtr;
1981 : 2862238 : XLogRecoveryCtl->lastReplayedEndRecPtr = xlogreader->EndRecPtr;
1982 : 2862238 : XLogRecoveryCtl->lastReplayedTLI = *replayTLI;
1983 : 2862238 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
1984 : :
1985 : : /* ------
1986 : : * Wakeup walsenders:
1987 : : *
1988 : : * On the standby, the WAL is flushed first (which will only wake up
1989 : : * physical walsenders) and then applied, which will only wake up logical
1990 : : * walsenders.
1991 : : *
1992 : : * Indeed, logical walsenders on standby can't decode and send data until
1993 : : * it's been applied.
1994 : : *
1995 : : * Physical walsenders don't need to be woken up during replay unless
1996 : : * cascading replication is allowed and time line change occurred (so that
1997 : : * they can notice that they are on a new time line).
1998 : : *
1999 : : * That's why the wake up conditions are for:
2000 : : *
2001 : : * - physical walsenders in case of new time line and cascade
2002 : : * replication is allowed
2003 : : * - logical walsenders in case cascade replication is allowed (could not
2004 : : * be created otherwise)
2005 : : * ------
2006 : : */
1072 andres@anarazel.de 2007 [ + + + + ]: 2862238 : if (AllowCascadeReplication())
2008 : 2610545 : WalSndWakeup(switchedTLI, true);
2009 : :
2010 : : /*
2011 : : * If rm_redo called XLogRequestWalReceiverReply, then we wake up the
2012 : : * receiver so that it notices the updated lastReplayedEndRecPtr and sends
2013 : : * a reply to the primary.
2014 : : */
1488 heikki.linnakangas@i 2015 [ + + ]: 2862238 : if (doRequestWalReceiverReply)
2016 : : {
2017 : 2 : doRequestWalReceiverReply = false;
2018 : 2 : WalRcvForceReply();
2019 : : }
2020 : :
2021 : : /* Allow read-only connections if we're consistent now */
2022 : 2862238 : CheckRecoveryConsistency();
2023 : :
2024 : : /* Is this a timeline switch? */
2025 [ + + ]: 2862238 : if (switchedTLI)
2026 : : {
2027 : : /*
2028 : : * Before we continue on the new timeline, clean up any (possibly
2029 : : * bogus) future WAL segments on the old timeline.
2030 : : */
2031 : 12 : RemoveNonParentXlogFiles(xlogreader->EndRecPtr, *replayTLI);
2032 : :
2033 : : /* Reset the prefetcher. */
1438 tmunro@postgresql.or 2034 : 12 : XLogPrefetchReconfigure();
2035 : : }
1488 heikki.linnakangas@i 2036 : 2862238 : }
2037 : :
2038 : : /*
2039 : : * Some XLOG RM record types that are directly related to WAL recovery are
2040 : : * handled here rather than in the xlog_redo()
2041 : : */
2042 : : static void
2043 : 107715 : xlogrecovery_redo(XLogReaderState *record, TimeLineID replayTLI)
2044 : : {
2045 : 107715 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2046 : 107715 : XLogRecPtr lsn = record->EndRecPtr;
2047 : :
2048 [ - + ]: 107715 : Assert(XLogRecGetRmid(record) == RM_XLOG_ID);
2049 : :
2050 [ + + ]: 107715 : if (info == XLOG_OVERWRITE_CONTRECORD)
2051 : : {
2052 : : /* Verify the payload of a XLOG_OVERWRITE_CONTRECORD record. */
2053 : : xl_overwrite_contrecord xlrec;
2054 : :
2055 : 1 : memcpy(&xlrec, XLogRecGetData(record), sizeof(xl_overwrite_contrecord));
2056 [ - + ]: 1 : if (xlrec.overwritten_lsn != record->overwrittenRecPtr)
251 alvherre@kurilemu.de 2057 [ # # ]:UNC 0 : elog(FATAL, "mismatching overwritten LSN %X/%08X -> %X/%08X",
2058 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2059 : : LSN_FORMAT_ARGS(record->overwrittenRecPtr));
2060 : :
2061 : : /* We have safely skipped the aborted record */
1453 alvherre@alvh.no-ip. 2062 :CBC 1 : abortedRecPtr = InvalidXLogRecPtr;
2063 : 1 : missingContrecPtr = InvalidXLogRecPtr;
2064 : :
1488 heikki.linnakangas@i 2065 [ + - ]: 1 : ereport(LOG,
2066 : : errmsg("successfully skipped missing contrecord at %X/%08X, overwritten at %s",
2067 : : LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
2068 : : timestamptz_to_str(xlrec.overwrite_time)));
2069 : :
2070 : : /* Verifying the record should only happen once */
2071 : 1 : record->overwrittenRecPtr = InvalidXLogRecPtr;
2072 : : }
2073 [ + + ]: 107714 : else if (info == XLOG_BACKUP_END)
2074 : : {
2075 : : XLogRecPtr startpoint;
2076 : :
2077 : 95 : memcpy(&startpoint, XLogRecGetData(record), sizeof(startpoint));
2078 : :
2079 [ + + ]: 95 : if (backupStartPoint == startpoint)
2080 : : {
2081 : : /*
2082 : : * We have reached the end of base backup, the point where
2083 : : * pg_backup_stop() was done. The data on disk is now consistent
2084 : : * (assuming we have also reached minRecoveryPoint). Set
2085 : : * backupEndPoint to the current LSN, so that the next call to
2086 : : * CheckRecoveryConsistency() will notice it and do the
2087 : : * end-of-backup processing.
2088 : : */
2089 [ + + ]: 78 : elog(DEBUG1, "end of backup record reached");
2090 : :
2091 : 78 : backupEndPoint = lsn;
2092 : : }
2093 : : else
251 alvherre@kurilemu.de 2094 [ + + ]:GNC 17 : elog(DEBUG1, "saw end-of-backup record for backup starting at %X/%08X, waiting for %X/%08X",
2095 : : LSN_FORMAT_ARGS(startpoint), LSN_FORMAT_ARGS(backupStartPoint));
2096 : : }
1488 heikki.linnakangas@i 2097 :CBC 107715 : }
2098 : :
2099 : : /*
2100 : : * Verify that, in non-test mode, ./pg_tblspc doesn't contain any real
2101 : : * directories.
2102 : : *
2103 : : * Replay of database creation XLOG records for databases that were later
2104 : : * dropped can create fake directories in pg_tblspc. By the time consistency
2105 : : * is reached these directories should have been removed; here we verify
2106 : : * that this did indeed happen. This is to be called at the point where
2107 : : * consistent state is reached.
2108 : : *
2109 : : * allow_in_place_tablespaces turns the PANIC into a WARNING, which is
2110 : : * useful for testing purposes, and also allows for an escape hatch in case
2111 : : * things go south.
2112 : : */
2113 : : static void
1326 alvherre@alvh.no-ip. 2114 : 123 : CheckTablespaceDirectory(void)
2115 : : {
2116 : : DIR *dir;
2117 : : struct dirent *de;
2118 : :
558 michael@paquier.xyz 2119 : 123 : dir = AllocateDir(PG_TBLSPC_DIR);
2120 [ + + ]: 376 : while ((de = ReadDir(dir, PG_TBLSPC_DIR)) != NULL)
2121 : : {
2122 : : char path[MAXPGPATH + sizeof(PG_TBLSPC_DIR)];
2123 : :
2124 : : /* Skip entries of non-oid names */
1326 alvherre@alvh.no-ip. 2125 [ + + ]: 253 : if (strspn(de->d_name, "0123456789") != strlen(de->d_name))
2126 : 246 : continue;
2127 : :
558 michael@paquier.xyz 2128 : 7 : snprintf(path, sizeof(path), "%s/%s", PG_TBLSPC_DIR, de->d_name);
2129 : :
1326 alvherre@alvh.no-ip. 2130 [ + + ]: 7 : if (get_dirent_type(path, de, false, ERROR) != PGFILETYPE_LNK)
2131 [ + - + - ]: 4 : ereport(allow_in_place_tablespaces ? WARNING : PANIC,
2132 : : (errcode(ERRCODE_DATA_CORRUPTED),
2133 : : errmsg("unexpected directory entry \"%s\" found in %s",
2134 : : de->d_name, PG_TBLSPC_DIR),
2135 : : errdetail("All directory entries in %s/ should be symbolic links.",
2136 : : PG_TBLSPC_DIR),
2137 : : errhint("Remove those directories, or set \"allow_in_place_tablespaces\" to ON transiently to let recovery complete.")));
2138 : : }
2139 : 123 : }
2140 : :
2141 : : /*
2142 : : * Checks if recovery has reached a consistent state. When consistency is
2143 : : * reached and we have a valid starting standby snapshot, tell postmaster
2144 : : * that it can start accepting read-only connections.
2145 : : */
2146 : : static void
1488 heikki.linnakangas@i 2147 : 2862463 : CheckRecoveryConsistency(void)
2148 : : {
2149 : : XLogRecPtr lastReplayedEndRecPtr;
2150 : : TimeLineID lastReplayedTLI;
2151 : :
2152 : : /*
2153 : : * During crash recovery, we don't reach a consistent state until we've
2154 : : * replayed all the WAL.
2155 : : */
129 alvherre@kurilemu.de 2156 [ + + ]:GNC 2862463 : if (!XLogRecPtrIsValid(minRecoveryPoint))
1488 heikki.linnakangas@i 2157 :CBC 320514 : return;
2158 : :
2159 [ - + ]: 2541949 : Assert(InArchiveRecovery);
2160 : :
2161 : : /*
2162 : : * assume that we are called in the startup process, and hence don't need
2163 : : * a lock to read lastReplayedEndRecPtr
2164 : : */
2165 : 2541949 : lastReplayedEndRecPtr = XLogRecoveryCtl->lastReplayedEndRecPtr;
2166 : 2541949 : lastReplayedTLI = XLogRecoveryCtl->lastReplayedTLI;
2167 : :
2168 : : /*
2169 : : * Have we reached the point where our base backup was completed?
2170 : : */
129 alvherre@kurilemu.de 2171 [ + + ]:GNC 2541949 : if (XLogRecPtrIsValid(backupEndPoint) &&
1488 heikki.linnakangas@i 2172 [ + + ]:CBC 112 : backupEndPoint <= lastReplayedEndRecPtr)
2173 : : {
780 michael@paquier.xyz 2174 : 80 : XLogRecPtr saveBackupStartPoint = backupStartPoint;
2175 : 80 : XLogRecPtr saveBackupEndPoint = backupEndPoint;
2176 : :
1488 heikki.linnakangas@i 2177 [ + + ]: 80 : elog(DEBUG1, "end of backup reached");
2178 : :
2179 : : /*
2180 : : * We have reached the end of base backup, as indicated by pg_control.
2181 : : * Update the control file accordingly.
2182 : : */
2183 : 80 : ReachedEndOfBackup(lastReplayedEndRecPtr, lastReplayedTLI);
2184 : 80 : backupStartPoint = InvalidXLogRecPtr;
2185 : 80 : backupEndPoint = InvalidXLogRecPtr;
2186 : 80 : backupEndRequired = false;
2187 : :
780 michael@paquier.xyz 2188 [ + - ]: 80 : ereport(LOG,
2189 : : errmsg("completed backup recovery with redo LSN %X/%08X and end LSN %X/%08X",
2190 : : LSN_FORMAT_ARGS(saveBackupStartPoint),
2191 : : LSN_FORMAT_ARGS(saveBackupEndPoint)));
2192 : : }
2193 : :
2194 : : /*
2195 : : * Have we passed our safe starting point? Note that minRecoveryPoint is
2196 : : * known to be incorrectly set if recovering from a backup, until the
2197 : : * XLOG_BACKUP_END arrives to advise us of the correct minRecoveryPoint.
2198 : : * All we know prior to that is that we're not consistent yet.
2199 : : */
1488 heikki.linnakangas@i 2200 [ + + + + ]: 2541949 : if (!reachedConsistency && !backupEndRequired &&
2201 [ + + ]: 7742 : minRecoveryPoint <= lastReplayedEndRecPtr)
2202 : : {
2203 : : /*
2204 : : * Check to see if the XLOG sequence contained any unresolved
2205 : : * references to uninitialized pages.
2206 : : */
2207 : 123 : XLogCheckInvalidPages();
2208 : :
2209 : : /*
2210 : : * Check that pg_tblspc doesn't contain any real directories. Replay
2211 : : * of Database/CREATE_* records may have created fictitious tablespace
2212 : : * directories that should have been removed by the time consistency
2213 : : * was reached.
2214 : : */
1326 alvherre@alvh.no-ip. 2215 : 123 : CheckTablespaceDirectory();
2216 : :
1488 heikki.linnakangas@i 2217 : 123 : reachedConsistency = true;
347 fujii@postgresql.org 2218 : 123 : SendPostmasterSignal(PMSIGNAL_RECOVERY_CONSISTENT);
1488 heikki.linnakangas@i 2219 [ + - ]: 123 : ereport(LOG,
2220 : : errmsg("consistent recovery state reached at %X/%08X",
2221 : : LSN_FORMAT_ARGS(lastReplayedEndRecPtr)));
2222 : : }
2223 : :
2224 : : /*
2225 : : * Have we got a valid starting snapshot that will allow queries to be
2226 : : * run? If so, we can tell postmaster that the database is consistent now,
2227 : : * enabling connections.
2228 : : */
2229 [ + + ]: 2541949 : if (standbyState == STANDBY_SNAPSHOT_READY &&
2230 [ + + + + ]: 2541706 : !LocalHotStandbyActive &&
2231 [ + - ]: 114 : reachedConsistency &&
2232 : : IsUnderPostmaster)
2233 : : {
2234 [ - + ]: 114 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
2235 : 114 : XLogRecoveryCtl->SharedHotStandbyActive = true;
2236 : 114 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
2237 : :
2238 : 114 : LocalHotStandbyActive = true;
2239 : :
2240 : 114 : SendPostmasterSignal(PMSIGNAL_BEGIN_HOT_STANDBY);
2241 : : }
2242 : : }
2243 : :
2244 : : /*
2245 : : * Error context callback for errors occurring during rm_redo().
2246 : : */
2247 : : static void
2248 : 146 : rm_redo_error_callback(void *arg)
2249 : : {
2250 : 146 : XLogReaderState *record = (XLogReaderState *) arg;
2251 : : StringInfoData buf;
2252 : :
2253 : 146 : initStringInfo(&buf);
2254 : 146 : xlog_outdesc(&buf, record);
2255 : 146 : xlog_block_info(&buf, record);
2256 : :
2257 : : /* translator: %s is a WAL record description */
251 alvherre@kurilemu.de 2258 :GNC 146 : errcontext("WAL redo at %X/%08X for %s",
1488 heikki.linnakangas@i 2259 :CBC 146 : LSN_FORMAT_ARGS(record->ReadRecPtr),
2260 : : buf.data);
2261 : :
2262 : 146 : pfree(buf.data);
2263 : 146 : }
2264 : :
2265 : : /*
2266 : : * Returns a string describing an XLogRecord, consisting of its identity
2267 : : * optionally followed by a colon, a space, and a further description.
2268 : : */
2269 : : void
2270 : 146 : xlog_outdesc(StringInfo buf, XLogReaderState *record)
2271 : : {
1439 jdavis@postgresql.or 2272 : 146 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
1488 heikki.linnakangas@i 2273 : 146 : uint8 info = XLogRecGetInfo(record);
2274 : : const char *id;
2275 : :
1439 jdavis@postgresql.or 2276 : 146 : appendStringInfoString(buf, rmgr.rm_name);
1488 heikki.linnakangas@i 2277 : 146 : appendStringInfoChar(buf, '/');
2278 : :
1439 jdavis@postgresql.or 2279 : 146 : id = rmgr.rm_identify(info);
1488 heikki.linnakangas@i 2280 [ - + ]: 146 : if (id == NULL)
1488 heikki.linnakangas@i 2281 :UBC 0 : appendStringInfo(buf, "UNKNOWN (%X): ", info & ~XLR_INFO_MASK);
2282 : : else
1488 heikki.linnakangas@i 2283 :CBC 146 : appendStringInfo(buf, "%s: ", id);
2284 : :
1439 jdavis@postgresql.or 2285 : 146 : rmgr.rm_desc(buf, record);
1488 heikki.linnakangas@i 2286 : 146 : }
2287 : :
2288 : : #ifdef WAL_DEBUG
2289 : :
2290 : : static void
2291 : : xlog_outrec(StringInfo buf, XLogReaderState *record)
2292 : : {
2293 : : appendStringInfo(buf, "prev %X/%08X; xid %u",
2294 : : LSN_FORMAT_ARGS(XLogRecGetPrev(record)),
2295 : : XLogRecGetXid(record));
2296 : :
2297 : : appendStringInfo(buf, "; len %u",
2298 : : XLogRecGetDataLen(record));
2299 : :
2300 : : xlog_block_info(buf, record);
2301 : : }
2302 : : #endif /* WAL_DEBUG */
2303 : :
2304 : : /*
2305 : : * Returns a string giving information about all the blocks in an
2306 : : * XLogRecord.
2307 : : */
2308 : : static void
2309 : 146 : xlog_block_info(StringInfo buf, XLogReaderState *record)
2310 : : {
2311 : : int block_id;
2312 : :
2313 : : /* decode block references */
1458 tmunro@postgresql.or 2314 [ + + ]: 190 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2315 : : {
2316 : : RelFileLocator rlocator;
2317 : : ForkNumber forknum;
2318 : : BlockNumber blk;
2319 : :
1434 tgl@sss.pgh.pa.us 2320 [ - + ]: 44 : if (!XLogRecGetBlockTagExtended(record, block_id,
2321 : : &rlocator, &forknum, &blk, NULL))
1488 heikki.linnakangas@i 2322 :LBC (1) : continue;
2323 : :
1488 heikki.linnakangas@i 2324 [ - + ]:CBC 44 : if (forknum != MAIN_FORKNUM)
1264 rhaas@postgresql.org 2325 :LBC (1) : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, fork %u, blk %u",
2326 : : block_id,
2327 : : rlocator.spcOid, rlocator.dbOid,
2328 : : rlocator.relNumber,
2329 : : forknum,
2330 : : blk);
2331 : : else
1264 rhaas@postgresql.org 2332 :CBC 44 : appendStringInfo(buf, "; blkref #%d: rel %u/%u/%u, blk %u",
2333 : : block_id,
2334 : : rlocator.spcOid, rlocator.dbOid,
2335 : : rlocator.relNumber,
2336 : : blk);
1488 heikki.linnakangas@i 2337 [ + + ]: 44 : if (XLogRecHasBlockImage(record, block_id))
2338 : 26 : appendStringInfoString(buf, " FPW");
2339 : : }
2340 : 146 : }
2341 : :
2342 : :
2343 : : /*
2344 : : * Check that it's OK to switch to new timeline during recovery.
2345 : : *
2346 : : * 'lsn' is the address of the shutdown checkpoint record we're about to
2347 : : * replay. (Currently, timeline can only change at a shutdown checkpoint).
2348 : : */
2349 : : static void
2350 : 12 : checkTimeLineSwitch(XLogRecPtr lsn, TimeLineID newTLI, TimeLineID prevTLI,
2351 : : TimeLineID replayTLI)
2352 : : {
2353 : : /* Check that the record agrees on what the current (old) timeline is */
2354 [ - + ]: 12 : if (prevTLI != replayTLI)
1488 heikki.linnakangas@i 2355 [ # # ]:UBC 0 : ereport(PANIC,
2356 : : (errmsg("unexpected previous timeline ID %u (current timeline ID %u) in checkpoint record",
2357 : : prevTLI, replayTLI)));
2358 : :
2359 : : /*
2360 : : * The new timeline better be in the list of timelines we expect to see,
2361 : : * according to the timeline history. It should also not decrease.
2362 : : */
1488 heikki.linnakangas@i 2363 [ + - - + ]:CBC 12 : if (newTLI < replayTLI || !tliInHistory(newTLI, expectedTLEs))
1488 heikki.linnakangas@i 2364 [ # # ]:UBC 0 : ereport(PANIC,
2365 : : (errmsg("unexpected timeline ID %u (after %u) in checkpoint record",
2366 : : newTLI, replayTLI)));
2367 : :
2368 : : /*
2369 : : * If we have not yet reached min recovery point, and we're about to
2370 : : * switch to a timeline greater than the timeline of the min recovery
2371 : : * point: trouble. After switching to the new timeline, we could not
2372 : : * possibly visit the min recovery point on the correct timeline anymore.
2373 : : * This can happen if there is a newer timeline in the archive that
2374 : : * branched before the timeline the min recovery point is on, and you
2375 : : * attempt to do PITR to the new timeline.
2376 : : */
129 alvherre@kurilemu.de 2377 [ + + ]:GNC 12 : if (XLogRecPtrIsValid(minRecoveryPoint) &&
1488 heikki.linnakangas@i 2378 [ + + ]:CBC 10 : lsn < minRecoveryPoint &&
2379 [ - + ]: 1 : newTLI > minRecoveryPointTLI)
1488 heikki.linnakangas@i 2380 [ # # ]:UBC 0 : ereport(PANIC,
2381 : : errmsg("unexpected timeline ID %u in checkpoint record, before reaching minimum recovery point %X/%08X on timeline %u",
2382 : : newTLI,
2383 : : LSN_FORMAT_ARGS(minRecoveryPoint),
2384 : : minRecoveryPointTLI));
2385 : :
2386 : : /* Looks good */
1488 heikki.linnakangas@i 2387 :CBC 12 : }
2388 : :
2389 : :
2390 : : /*
2391 : : * Extract timestamp from WAL record.
2392 : : *
2393 : : * If the record contains a timestamp, returns true, and saves the timestamp
2394 : : * in *recordXtime. If the record type has no timestamp, returns false.
2395 : : * Currently, only transaction commit/abort records and restore points contain
2396 : : * timestamps.
2397 : : */
2398 : : static bool
2399 : 45199 : getRecordTimestamp(XLogReaderState *record, TimestampTz *recordXtime)
2400 : : {
2401 : 45199 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2402 : 45199 : uint8 xact_info = info & XLOG_XACT_OPMASK;
2403 : 45199 : uint8 rmid = XLogRecGetRmid(record);
2404 : :
2405 [ + + + - ]: 45199 : if (rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2406 : : {
2407 : 2 : *recordXtime = ((xl_restore_point *) XLogRecGetData(record))->rp_time;
2408 : 2 : return true;
2409 : : }
2410 [ + - + + : 45197 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_COMMIT ||
+ + ]
2411 : : xact_info == XLOG_XACT_COMMIT_PREPARED))
2412 : : {
2413 : 41409 : *recordXtime = ((xl_xact_commit *) XLogRecGetData(record))->xact_time;
2414 : 41409 : return true;
2415 : : }
2416 [ + - + + : 3788 : if (rmid == RM_XACT_ID && (xact_info == XLOG_XACT_ABORT ||
+ - ]
2417 : : xact_info == XLOG_XACT_ABORT_PREPARED))
2418 : : {
2419 : 3788 : *recordXtime = ((xl_xact_abort *) XLogRecGetData(record))->xact_time;
2420 : 3788 : return true;
2421 : : }
1488 heikki.linnakangas@i 2422 :UBC 0 : return false;
2423 : : }
2424 : :
2425 : : /*
2426 : : * Checks whether the current buffer page and backup page stored in the
2427 : : * WAL record are consistent or not. Before comparing the two pages, a
2428 : : * masking can be applied to the pages to ignore certain areas like hint bits,
2429 : : * unused space between pd_lower and pd_upper among other things. This
2430 : : * function should be called once WAL replay has been completed for a
2431 : : * given record.
2432 : : */
2433 : : static void
1488 heikki.linnakangas@i 2434 :CBC 2213510 : verifyBackupPageConsistency(XLogReaderState *record)
2435 : : {
1439 jdavis@postgresql.or 2436 : 2213510 : RmgrData rmgr = GetRmgr(XLogRecGetRmid(record));
2437 : : RelFileLocator rlocator;
2438 : : ForkNumber forknum;
2439 : : BlockNumber blkno;
2440 : : int block_id;
2441 : :
2442 : : /* Records with no backup blocks have no need for consistency checks. */
1488 heikki.linnakangas@i 2443 [ + + ]: 2213510 : if (!XLogRecHasAnyBlockRefs(record))
2444 : 68 : return;
2445 : :
2446 [ - + ]: 2213442 : Assert((XLogRecGetInfo(record) & XLR_CHECK_CONSISTENCY) != 0);
2447 : :
1458 tmunro@postgresql.or 2448 [ + + ]: 4595512 : for (block_id = 0; block_id <= XLogRecMaxBlockId(record); block_id++)
2449 : : {
2450 : : Buffer buf;
2451 : : Page page;
2452 : :
1434 tgl@sss.pgh.pa.us 2453 [ + + ]: 2382070 : if (!XLogRecGetBlockTagExtended(record, block_id,
2454 : : &rlocator, &forknum, &blkno, NULL))
2455 : : {
2456 : : /*
2457 : : * WAL record doesn't contain a block reference with the given id.
2458 : : * Do nothing.
2459 : : */
1488 heikki.linnakangas@i 2460 : 2085 : continue;
2461 : : }
2462 : :
2463 [ - + ]: 2379985 : Assert(XLogRecHasBlockImage(record, block_id));
2464 : :
2465 [ + + ]: 2379985 : if (XLogRecBlockImageApply(record, block_id))
2466 : : {
2467 : : /*
2468 : : * WAL record has already applied the page, so bypass the
2469 : : * consistency check as that would result in comparing the full
2470 : : * page stored in the record with itself.
2471 : : */
2472 : 26656 : continue;
2473 : : }
2474 : :
2475 : : /*
2476 : : * Read the contents from the current buffer and store it in a
2477 : : * temporary page.
2478 : : */
1348 rhaas@postgresql.org 2479 : 2353329 : buf = XLogReadBufferExtended(rlocator, forknum, blkno,
2480 : : RBM_NORMAL_NO_LOG,
2481 : : InvalidBuffer);
1488 heikki.linnakangas@i 2482 [ - + ]: 2353329 : if (!BufferIsValid(buf))
1488 heikki.linnakangas@i 2483 :UBC 0 : continue;
2484 : :
1488 heikki.linnakangas@i 2485 :CBC 2353329 : LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
2486 : 2353329 : page = BufferGetPage(buf);
2487 : :
2488 : : /*
2489 : : * Take a copy of the local page where WAL has been applied to have a
2490 : : * comparison base before masking it...
2491 : : */
2492 : 2353329 : memcpy(replay_image_masked, page, BLCKSZ);
2493 : :
2494 : : /* No need for this page anymore now that a copy is in. */
2495 : 2353329 : UnlockReleaseBuffer(buf);
2496 : :
2497 : : /*
2498 : : * If the block LSN is already ahead of this WAL record, we can't
2499 : : * expect contents to match. This can happen if recovery is
2500 : : * restarted.
2501 : : */
2502 [ - + ]: 2353329 : if (PageGetLSN(replay_image_masked) > record->EndRecPtr)
1488 heikki.linnakangas@i 2503 :UBC 0 : continue;
2504 : :
2505 : : /*
2506 : : * Read the contents from the backup copy, stored in WAL record and
2507 : : * store it in a temporary page. There is no need to allocate a new
2508 : : * page here, a local buffer is fine to hold its contents and a mask
2509 : : * can be directly applied on it.
2510 : : */
1488 heikki.linnakangas@i 2511 [ - + ]:CBC 2353329 : if (!RestoreBlockImage(record, block_id, primary_image_masked))
1283 michael@paquier.xyz 2512 [ # # ]:UBC 0 : ereport(ERROR,
2513 : : (errcode(ERRCODE_INTERNAL_ERROR),
2514 : : errmsg_internal("%s", record->errormsg_buf)));
2515 : :
2516 : : /*
2517 : : * If masking function is defined, mask both the primary and replay
2518 : : * images
2519 : : */
1439 jdavis@postgresql.or 2520 [ + - ]:CBC 2353329 : if (rmgr.rm_mask != NULL)
2521 : : {
2522 : 2353329 : rmgr.rm_mask(replay_image_masked, blkno);
2523 : 2353329 : rmgr.rm_mask(primary_image_masked, blkno);
2524 : : }
2525 : :
2526 : : /* Time to compare the primary and replay images. */
1488 heikki.linnakangas@i 2527 [ - + ]: 2353329 : if (memcmp(replay_image_masked, primary_image_masked, BLCKSZ) != 0)
2528 : : {
1488 heikki.linnakangas@i 2529 [ # # ]:UBC 0 : elog(FATAL,
2530 : : "inconsistent page found, rel %u/%u/%u, forknum %u, blkno %u",
2531 : : rlocator.spcOid, rlocator.dbOid, rlocator.relNumber,
2532 : : forknum, blkno);
2533 : : }
2534 : : }
2535 : : }
2536 : :
2537 : : /*
2538 : : * For point-in-time recovery, this function decides whether we want to
2539 : : * stop applying the XLOG before the current record.
2540 : : *
2541 : : * Returns true if we are stopping, false otherwise. If stopping, some
2542 : : * information is saved in recoveryStopXid et al for use in annotating the
2543 : : * new timeline's history file.
2544 : : */
2545 : : static bool
1488 heikki.linnakangas@i 2546 :CBC 2862242 : recoveryStopsBefore(XLogReaderState *record)
2547 : : {
2548 : 2862242 : bool stopsHere = false;
2549 : : uint8 xact_info;
2550 : : bool isCommit;
2551 : 2862242 : TimestampTz recordXtime = 0;
2552 : : TransactionId recordXid;
2553 : :
2554 : : /*
2555 : : * Ignore recovery target settings when not in archive recovery (meaning
2556 : : * we are in crash recovery).
2557 : : */
2558 [ + + ]: 2862242 : if (!ArchiveRecoveryRequested)
2559 : 306058 : return false;
2560 : :
2561 : : /* Check if we should stop as soon as reaching consistency */
2562 [ - + - - ]: 2556184 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2563 : : {
1488 heikki.linnakangas@i 2564 [ # # ]:UBC 0 : ereport(LOG,
2565 : : (errmsg("recovery stopping after reaching consistency")));
2566 : :
2567 : 0 : recoveryStopAfter = false;
2568 : 0 : recoveryStopXid = InvalidTransactionId;
2569 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2570 : 0 : recoveryStopTime = 0;
2571 : 0 : recoveryStopName[0] = '\0';
2572 : 0 : return true;
2573 : : }
2574 : :
2575 : : /* Check if target LSN has been reached */
1488 heikki.linnakangas@i 2576 [ + + ]:CBC 2556184 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2577 [ + + ]: 8516 : !recoveryTargetInclusive &&
2578 [ + + ]: 477 : record->ReadRecPtr >= recoveryTargetLSN)
2579 : : {
2580 : 2 : recoveryStopAfter = false;
2581 : 2 : recoveryStopXid = InvalidTransactionId;
2582 : 2 : recoveryStopLSN = record->ReadRecPtr;
2583 : 2 : recoveryStopTime = 0;
2584 : 2 : recoveryStopName[0] = '\0';
2585 [ + - ]: 2 : ereport(LOG,
2586 : : errmsg("recovery stopping before WAL location (LSN) \"%X/%08X\"",
2587 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2588 : 2 : return true;
2589 : : }
2590 : :
2591 : : /* Otherwise we only consider stopping before COMMIT or ABORT records. */
2592 [ + + ]: 2556182 : if (XLogRecGetRmid(record) != RM_XACT_ID)
2593 : 2533296 : return false;
2594 : :
2595 : 22886 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
2596 : :
2597 [ + + ]: 22886 : if (xact_info == XLOG_XACT_COMMIT)
2598 : : {
2599 : 20665 : isCommit = true;
2600 : 20665 : recordXid = XLogRecGetXid(record);
2601 : : }
2602 [ + + ]: 2221 : else if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2603 : : {
2604 : 26 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2605 : : xl_xact_parsed_commit parsed;
2606 : :
2607 : 26 : isCommit = true;
2608 : 26 : ParseCommitRecord(XLogRecGetInfo(record),
2609 : : xlrec,
2610 : : &parsed);
2611 : 26 : recordXid = parsed.twophase_xid;
2612 : : }
2613 [ + + ]: 2195 : else if (xact_info == XLOG_XACT_ABORT)
2614 : : {
2615 : 1879 : isCommit = false;
2616 : 1879 : recordXid = XLogRecGetXid(record);
2617 : : }
2618 [ + + ]: 316 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2619 : : {
2620 : 15 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2621 : : xl_xact_parsed_abort parsed;
2622 : :
2623 : 15 : isCommit = false;
2624 : 15 : ParseAbortRecord(XLogRecGetInfo(record),
2625 : : xlrec,
2626 : : &parsed);
2627 : 15 : recordXid = parsed.twophase_xid;
2628 : : }
2629 : : else
2630 : 301 : return false;
2631 : :
2632 [ - + - - ]: 22585 : if (recoveryTarget == RECOVERY_TARGET_XID && !recoveryTargetInclusive)
2633 : : {
2634 : : /*
2635 : : * There can be only one transaction end record with this exact
2636 : : * transactionid
2637 : : *
2638 : : * when testing for an xid, we MUST test for equality only, since
2639 : : * transactions are numbered in the order they start, not the order
2640 : : * they complete. A higher numbered xid will complete before you about
2641 : : * 50% of the time...
2642 : : */
1488 heikki.linnakangas@i 2643 :UBC 0 : stopsHere = (recordXid == recoveryTargetXid);
2644 : : }
2645 : :
2646 : : /*
2647 : : * Note: we must fetch recordXtime regardless of recoveryTarget setting.
2648 : : * We don't expect getRecordTimestamp ever to fail, since we already know
2649 : : * this is a commit or abort record; but test its result anyway.
2650 : : */
1151 tgl@sss.pgh.pa.us 2651 [ + - ]:CBC 22585 : if (getRecordTimestamp(record, &recordXtime) &&
2652 [ - + ]: 22585 : recoveryTarget == RECOVERY_TARGET_TIME)
2653 : : {
2654 : : /*
2655 : : * There can be many transactions that share the same commit time, so
2656 : : * we stop after the last one, if we are inclusive, or stop at the
2657 : : * first one if we are exclusive
2658 : : */
1488 heikki.linnakangas@i 2659 [ # # ]:UBC 0 : if (recoveryTargetInclusive)
2660 : 0 : stopsHere = (recordXtime > recoveryTargetTime);
2661 : : else
2662 : 0 : stopsHere = (recordXtime >= recoveryTargetTime);
2663 : : }
2664 : :
1488 heikki.linnakangas@i 2665 [ - + ]:CBC 22585 : if (stopsHere)
2666 : : {
1488 heikki.linnakangas@i 2667 :UBC 0 : recoveryStopAfter = false;
2668 : 0 : recoveryStopXid = recordXid;
2669 : 0 : recoveryStopTime = recordXtime;
2670 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2671 : 0 : recoveryStopName[0] = '\0';
2672 : :
2673 [ # # ]: 0 : if (isCommit)
2674 : : {
2675 [ # # ]: 0 : ereport(LOG,
2676 : : (errmsg("recovery stopping before commit of transaction %u, time %s",
2677 : : recoveryStopXid,
2678 : : timestamptz_to_str(recoveryStopTime))));
2679 : : }
2680 : : else
2681 : : {
2682 [ # # ]: 0 : ereport(LOG,
2683 : : (errmsg("recovery stopping before abort of transaction %u, time %s",
2684 : : recoveryStopXid,
2685 : : timestamptz_to_str(recoveryStopTime))));
2686 : : }
2687 : : }
2688 : :
1488 heikki.linnakangas@i 2689 :CBC 22585 : return stopsHere;
2690 : : }
2691 : :
2692 : : /*
2693 : : * Same as recoveryStopsBefore, but called after applying the record.
2694 : : *
2695 : : * We also track the timestamp of the latest applied COMMIT/ABORT
2696 : : * record in XLogRecoveryCtl->recoveryLastXTime.
2697 : : */
2698 : : static bool
2699 : 2862238 : recoveryStopsAfter(XLogReaderState *record)
2700 : : {
2701 : : uint8 info;
2702 : : uint8 xact_info;
2703 : : uint8 rmid;
1013 2704 : 2862238 : TimestampTz recordXtime = 0;
2705 : :
2706 : : /*
2707 : : * Ignore recovery target settings when not in archive recovery (meaning
2708 : : * we are in crash recovery).
2709 : : */
1488 2710 [ + + ]: 2862238 : if (!ArchiveRecoveryRequested)
2711 : 306058 : return false;
2712 : :
2713 : 2556180 : info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
2714 : 2556180 : rmid = XLogRecGetRmid(record);
2715 : :
2716 : : /*
2717 : : * There can be many restore points that share the same name; we stop at
2718 : : * the first one.
2719 : : */
2720 [ + + + + ]: 2556180 : if (recoveryTarget == RECOVERY_TARGET_NAME &&
2721 [ + + ]: 20 : rmid == RM_XLOG_ID && info == XLOG_RESTORE_POINT)
2722 : : {
2723 : : xl_restore_point *recordRestorePointData;
2724 : :
2725 : 3 : recordRestorePointData = (xl_restore_point *) XLogRecGetData(record);
2726 : :
2727 [ + + ]: 3 : if (strcmp(recordRestorePointData->rp_name, recoveryTargetName) == 0)
2728 : : {
2729 : 2 : recoveryStopAfter = true;
2730 : 2 : recoveryStopXid = InvalidTransactionId;
2731 : 2 : recoveryStopLSN = InvalidXLogRecPtr;
2732 : 2 : (void) getRecordTimestamp(record, &recoveryStopTime);
2733 : 2 : strlcpy(recoveryStopName, recordRestorePointData->rp_name, MAXFNAMELEN);
2734 : :
2735 [ + - ]: 2 : ereport(LOG,
2736 : : (errmsg("recovery stopping at restore point \"%s\", time %s",
2737 : : recoveryStopName,
2738 : : timestamptz_to_str(recoveryStopTime))));
2739 : 2 : return true;
2740 : : }
2741 : : }
2742 : :
2743 : : /* Check if the target LSN has been reached */
2744 [ + + + + ]: 2556178 : if (recoveryTarget == RECOVERY_TARGET_LSN &&
2745 : 8039 : recoveryTargetInclusive &&
2746 [ + + ]: 8039 : record->ReadRecPtr >= recoveryTargetLSN)
2747 : : {
2748 : 3 : recoveryStopAfter = true;
2749 : 3 : recoveryStopXid = InvalidTransactionId;
2750 : 3 : recoveryStopLSN = record->ReadRecPtr;
2751 : 3 : recoveryStopTime = 0;
2752 : 3 : recoveryStopName[0] = '\0';
2753 [ + - ]: 3 : ereport(LOG,
2754 : : errmsg("recovery stopping after WAL location (LSN) \"%X/%08X\"",
2755 : : LSN_FORMAT_ARGS(recoveryStopLSN)));
2756 : 3 : return true;
2757 : : }
2758 : :
2759 [ + + ]: 2556175 : if (rmid != RM_XACT_ID)
2760 : 2533291 : return false;
2761 : :
2762 : 22884 : xact_info = info & XLOG_XACT_OPMASK;
2763 : :
2764 [ + + + + ]: 22884 : if (xact_info == XLOG_XACT_COMMIT ||
2765 [ + + ]: 2195 : xact_info == XLOG_XACT_COMMIT_PREPARED ||
2766 [ + + ]: 316 : xact_info == XLOG_XACT_ABORT ||
2767 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2768 : : {
2769 : : TransactionId recordXid;
2770 : :
2771 : : /* Update the last applied transaction timestamp */
2772 [ + - ]: 22583 : if (getRecordTimestamp(record, &recordXtime))
2773 : 22583 : SetLatestXTime(recordXtime);
2774 : :
2775 : : /* Extract the XID of the committed/aborted transaction */
2776 [ + + ]: 22583 : if (xact_info == XLOG_XACT_COMMIT_PREPARED)
2777 : : {
2778 : 26 : xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
2779 : : xl_xact_parsed_commit parsed;
2780 : :
2781 : 26 : ParseCommitRecord(XLogRecGetInfo(record),
2782 : : xlrec,
2783 : : &parsed);
2784 : 26 : recordXid = parsed.twophase_xid;
2785 : : }
2786 [ + + ]: 22557 : else if (xact_info == XLOG_XACT_ABORT_PREPARED)
2787 : : {
2788 : 15 : xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
2789 : : xl_xact_parsed_abort parsed;
2790 : :
2791 : 15 : ParseAbortRecord(XLogRecGetInfo(record),
2792 : : xlrec,
2793 : : &parsed);
2794 : 15 : recordXid = parsed.twophase_xid;
2795 : : }
2796 : : else
2797 : 22542 : recordXid = XLogRecGetXid(record);
2798 : :
2799 : : /*
2800 : : * There can be only one transaction end record with this exact
2801 : : * transactionid
2802 : : *
2803 : : * when testing for an xid, we MUST test for equality only, since
2804 : : * transactions are numbered in the order they start, not the order
2805 : : * they complete. A higher numbered xid will complete before you about
2806 : : * 50% of the time...
2807 : : */
2808 [ - + - - ]: 22583 : if (recoveryTarget == RECOVERY_TARGET_XID && recoveryTargetInclusive &&
1488 heikki.linnakangas@i 2809 [ # # ]:UBC 0 : recordXid == recoveryTargetXid)
2810 : : {
2811 : 0 : recoveryStopAfter = true;
2812 : 0 : recoveryStopXid = recordXid;
2813 : 0 : recoveryStopTime = recordXtime;
2814 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2815 : 0 : recoveryStopName[0] = '\0';
2816 : :
2817 [ # # # # ]: 0 : if (xact_info == XLOG_XACT_COMMIT ||
2818 : : xact_info == XLOG_XACT_COMMIT_PREPARED)
2819 : : {
2820 [ # # ]: 0 : ereport(LOG,
2821 : : (errmsg("recovery stopping after commit of transaction %u, time %s",
2822 : : recoveryStopXid,
2823 : : timestamptz_to_str(recoveryStopTime))));
2824 : : }
2825 [ # # # # ]: 0 : else if (xact_info == XLOG_XACT_ABORT ||
2826 : : xact_info == XLOG_XACT_ABORT_PREPARED)
2827 : : {
2828 [ # # ]: 0 : ereport(LOG,
2829 : : (errmsg("recovery stopping after abort of transaction %u, time %s",
2830 : : recoveryStopXid,
2831 : : timestamptz_to_str(recoveryStopTime))));
2832 : : }
2833 : 0 : return true;
2834 : : }
2835 : : }
2836 : :
2837 : : /* Check if we should stop as soon as reaching consistency */
1488 heikki.linnakangas@i 2838 [ - + - - ]:CBC 22884 : if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE && reachedConsistency)
2839 : : {
1488 heikki.linnakangas@i 2840 [ # # ]:UBC 0 : ereport(LOG,
2841 : : (errmsg("recovery stopping after reaching consistency")));
2842 : :
2843 : 0 : recoveryStopAfter = true;
2844 : 0 : recoveryStopXid = InvalidTransactionId;
2845 : 0 : recoveryStopTime = 0;
2846 : 0 : recoveryStopLSN = InvalidXLogRecPtr;
2847 : 0 : recoveryStopName[0] = '\0';
2848 : 0 : return true;
2849 : : }
2850 : :
1488 heikki.linnakangas@i 2851 :CBC 22884 : return false;
2852 : : }
2853 : :
2854 : : /*
2855 : : * Create a comment for the history file to explain why and where
2856 : : * timeline changed.
2857 : : */
2858 : : static char *
2859 : 939 : getRecoveryStopReason(void)
2860 : : {
2861 : : char reason[200];
2862 : :
2863 [ - + ]: 939 : if (recoveryTarget == RECOVERY_TARGET_XID)
1488 heikki.linnakangas@i 2864 :UBC 0 : snprintf(reason, sizeof(reason),
2865 : : "%s transaction %u",
2866 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2867 : : recoveryStopXid);
1488 heikki.linnakangas@i 2868 [ - + ]:CBC 939 : else if (recoveryTarget == RECOVERY_TARGET_TIME)
1488 heikki.linnakangas@i 2869 :UBC 0 : snprintf(reason, sizeof(reason),
2870 : : "%s %s\n",
2871 [ # # ]: 0 : recoveryStopAfter ? "after" : "before",
2872 : : timestamptz_to_str(recoveryStopTime));
1488 heikki.linnakangas@i 2873 [ + + ]:CBC 939 : else if (recoveryTarget == RECOVERY_TARGET_LSN)
2874 : 6 : snprintf(reason, sizeof(reason),
2875 : : "%s LSN %X/%08X\n",
2876 : 6 : recoveryStopAfter ? "after" : "before",
2877 [ + + ]: 6 : LSN_FORMAT_ARGS(recoveryStopLSN));
2878 [ + + ]: 933 : else if (recoveryTarget == RECOVERY_TARGET_NAME)
2879 : 3 : snprintf(reason, sizeof(reason),
2880 : : "at restore point \"%s\"",
2881 : : recoveryStopName);
2882 [ - + ]: 930 : else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
1488 heikki.linnakangas@i 2883 :UBC 0 : snprintf(reason, sizeof(reason), "reached consistency");
2884 : : else
1488 heikki.linnakangas@i 2885 :CBC 930 : snprintf(reason, sizeof(reason), "no recovery target specified");
2886 : :
2887 : 939 : return pstrdup(reason);
2888 : : }
2889 : :
2890 : : /*
2891 : : * Wait until shared recoveryPauseState is set to RECOVERY_NOT_PAUSED.
2892 : : *
2893 : : * endOfRecovery is true if the recovery target is reached and
2894 : : * the paused state starts at the end of recovery because of
2895 : : * recovery_target_action=pause, and false otherwise.
2896 : : */
2897 : : static void
2898 : 4 : recoveryPausesHere(bool endOfRecovery)
2899 : : {
2900 : : /* Don't pause unless users can connect! */
2901 [ - + ]: 4 : if (!LocalHotStandbyActive)
1488 heikki.linnakangas@i 2902 :UBC 0 : return;
2903 : :
2904 : : /* Don't pause after standby promotion has been triggered */
1488 heikki.linnakangas@i 2905 [ - + ]:CBC 4 : if (LocalPromoteIsTriggered)
1488 heikki.linnakangas@i 2906 :UBC 0 : return;
2907 : :
1488 heikki.linnakangas@i 2908 [ + + ]:CBC 4 : if (endOfRecovery)
2909 [ + - ]: 1 : ereport(LOG,
2910 : : (errmsg("pausing at the end of recovery"),
2911 : : errhint("Execute pg_wal_replay_resume() to promote.")));
2912 : : else
2913 [ + - ]: 3 : ereport(LOG,
2914 : : (errmsg("recovery has paused"),
2915 : : errhint("Execute pg_wal_replay_resume() to continue.")));
2916 : :
2917 : : /* loop until recoveryPauseState is set to RECOVERY_NOT_PAUSED */
2918 [ + + ]: 12 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
2919 : : {
375 2920 : 10 : ProcessStartupProcInterrupts();
1488 2921 [ + + ]: 10 : if (CheckForStandbyTrigger())
2922 : 2 : return;
2923 : :
2924 : : /*
2925 : : * If recovery pause is requested then set it paused. While we are in
2926 : : * the loop, user might resume and pause again so set this every time.
2927 : : */
2928 : 8 : ConfirmRecoveryPaused();
2929 : :
2930 : : /*
2931 : : * We wait on a condition variable that will wake us as soon as the
2932 : : * pause ends, but we use a timeout so we can check the above exit
2933 : : * condition periodically too.
2934 : : */
2935 : 8 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
2936 : : WAIT_EVENT_RECOVERY_PAUSE);
2937 : : }
2938 : 2 : ConditionVariableCancelSleep();
2939 : : }
2940 : :
2941 : : /*
2942 : : * When recovery_min_apply_delay is set, we wait long enough to make sure
2943 : : * certain record types are applied at least that interval behind the primary.
2944 : : *
2945 : : * Returns true if we waited.
2946 : : *
2947 : : * Note that the delay is calculated between the WAL record log time and
2948 : : * the current time on standby. We would prefer to keep track of when this
2949 : : * standby received each WAL record, which would allow a more consistent
2950 : : * approach and one not affected by time synchronisation issues, but that
2951 : : * is significantly more effort and complexity for little actual gain in
2952 : : * usability.
2953 : : */
2954 : : static bool
2955 : 2862240 : recoveryApplyDelay(XLogReaderState *record)
2956 : : {
2957 : : uint8 xact_info;
2958 : : TimestampTz xtime;
2959 : : TimestampTz delayUntil;
2960 : : long msecs;
2961 : :
2962 : : /* nothing to do if no delay configured */
2963 [ + + ]: 2862240 : if (recovery_min_apply_delay <= 0)
2964 : 2862093 : return false;
2965 : :
2966 : : /* no delay is applied on a database not yet consistent */
1488 heikki.linnakangas@i 2967 [ + + ]:GBC 147 : if (!reachedConsistency)
2968 : 4 : return false;
2969 : :
2970 : : /* nothing to do if crash recovery is requested */
2971 [ - + ]: 143 : if (!ArchiveRecoveryRequested)
1488 heikki.linnakangas@i 2972 :UBC 0 : return false;
2973 : :
2974 : : /*
2975 : : * Is it a COMMIT record?
2976 : : *
2977 : : * We deliberately choose not to delay aborts since they have no effect on
2978 : : * MVCC. We already allow replay of records that don't have a timestamp,
2979 : : * so there is already opportunity for issues caused by early conflicts on
2980 : : * standbys.
2981 : : */
1488 heikki.linnakangas@i 2982 [ + + ]:GBC 143 : if (XLogRecGetRmid(record) != RM_XACT_ID)
2983 : 114 : return false;
2984 : :
2985 : 29 : xact_info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
2986 : :
2987 [ - + - - ]: 29 : if (xact_info != XLOG_XACT_COMMIT &&
2988 : : xact_info != XLOG_XACT_COMMIT_PREPARED)
1488 heikki.linnakangas@i 2989 :UBC 0 : return false;
2990 : :
1488 heikki.linnakangas@i 2991 [ - + ]:GBC 29 : if (!getRecordTimestamp(record, &xtime))
1488 heikki.linnakangas@i 2992 :UBC 0 : return false;
2993 : :
1488 heikki.linnakangas@i 2994 :GBC 29 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
2995 : :
2996 : : /*
2997 : : * Exit without arming the latch if it's already past time to apply this
2998 : : * record
2999 : : */
3000 : 29 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(), delayUntil);
3001 [ + - ]: 29 : if (msecs <= 0)
1488 heikki.linnakangas@i 3002 :UBC 0 : return false;
3003 : :
3004 : : while (true)
3005 : : {
1488 heikki.linnakangas@i 3006 :GBC 118 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3007 : :
3008 : : /* This might change recovery_min_apply_delay. */
375 3009 : 118 : ProcessStartupProcInterrupts();
3010 : :
1488 3011 [ - + ]: 118 : if (CheckForStandbyTrigger())
1488 heikki.linnakangas@i 3012 :UBC 0 : break;
3013 : :
3014 : : /*
3015 : : * Recalculate delayUntil as recovery_min_apply_delay could have
3016 : : * changed while waiting in this loop.
3017 : : */
1488 heikki.linnakangas@i 3018 :GBC 118 : delayUntil = TimestampTzPlusMilliseconds(xtime, recovery_min_apply_delay);
3019 : :
3020 : : /*
3021 : : * Wait for difference between GetCurrentTimestamp() and delayUntil.
3022 : : */
3023 : 118 : msecs = TimestampDifferenceMilliseconds(GetCurrentTimestamp(),
3024 : : delayUntil);
3025 : :
3026 [ + + ]: 118 : if (msecs <= 0)
3027 : 29 : break;
3028 : :
3029 [ - + ]: 89 : elog(DEBUG2, "recovery apply delay %ld milliseconds", msecs);
3030 : :
3031 : 89 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3032 : : WL_LATCH_SET | WL_TIMEOUT | WL_EXIT_ON_PM_DEATH,
3033 : : msecs,
3034 : : WAIT_EVENT_RECOVERY_APPLY_DELAY);
3035 : : }
3036 : 29 : return true;
3037 : : }
3038 : :
3039 : : /*
3040 : : * Get the current state of the recovery pause request.
3041 : : */
3042 : : RecoveryPauseState
1488 heikki.linnakangas@i 3043 :CBC 18 : GetRecoveryPauseState(void)
3044 : : {
3045 : : RecoveryPauseState state;
3046 : :
3047 [ - + ]: 18 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3048 : 18 : state = XLogRecoveryCtl->recoveryPauseState;
3049 : 18 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3050 : :
3051 : 18 : return state;
3052 : : }
3053 : :
3054 : : /*
3055 : : * Set the recovery pause state.
3056 : : *
3057 : : * If recovery pause is requested then sets the recovery pause state to
3058 : : * 'pause requested' if it is not already 'paused'. Otherwise, sets it
3059 : : * to 'not paused' to resume the recovery. The recovery pause will be
3060 : : * confirmed by the ConfirmRecoveryPaused.
3061 : : */
3062 : : void
3063 : 56 : SetRecoveryPause(bool recoveryPause)
3064 : : {
3065 [ - + ]: 56 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3066 : :
3067 [ + + ]: 56 : if (!recoveryPause)
3068 : 51 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_NOT_PAUSED;
3069 [ + - ]: 5 : else if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_NOT_PAUSED)
3070 : 5 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSE_REQUESTED;
3071 : :
3072 : 56 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3073 : :
3074 [ + + ]: 56 : if (!recoveryPause)
3075 : 51 : ConditionVariableBroadcast(&XLogRecoveryCtl->recoveryNotPausedCV);
3076 : 56 : }
3077 : :
3078 : : /*
3079 : : * Confirm the recovery pause by setting the recovery pause state to
3080 : : * RECOVERY_PAUSED.
3081 : : */
3082 : : static void
3083 : 8 : ConfirmRecoveryPaused(void)
3084 : : {
3085 : : /* If recovery pause is requested then set it paused */
3086 [ - + ]: 8 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
3087 [ + + ]: 8 : if (XLogRecoveryCtl->recoveryPauseState == RECOVERY_PAUSE_REQUESTED)
3088 : 4 : XLogRecoveryCtl->recoveryPauseState = RECOVERY_PAUSED;
3089 : 8 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
3090 : 8 : }
3091 : :
3092 : :
3093 : : /*
3094 : : * Attempt to read the next XLOG record.
3095 : : *
3096 : : * Before first call, the reader needs to be positioned to the first record
3097 : : * by calling XLogPrefetcherBeginRead().
3098 : : *
3099 : : * If no valid record is available, returns NULL, or fails if emode is PANIC.
3100 : : * (emode must be either PANIC, LOG). In standby mode, retries until a valid
3101 : : * record is available.
3102 : : */
3103 : : static XLogRecord *
1438 tmunro@postgresql.or 3104 : 2864524 : ReadRecord(XLogPrefetcher *xlogprefetcher, int emode,
3105 : : bool fetching_ckpt, TimeLineID replayTLI)
3106 : : {
3107 : : XLogRecord *record;
3108 : 2864524 : XLogReaderState *xlogreader = XLogPrefetcherGetReader(xlogprefetcher);
1488 heikki.linnakangas@i 3109 : 2864524 : XLogPageReadPrivate *private = (XLogPageReadPrivate *) xlogreader->private_data;
3110 : :
130 michael@paquier.xyz 3111 [ + + - + ]:GNC 2864524 : Assert(AmStartupProcess() || !IsUnderPostmaster);
3112 : :
3113 : : /* Pass through parameters to XLogPageRead */
1488 heikki.linnakangas@i 3114 :CBC 2864524 : private->fetching_ckpt = fetching_ckpt;
3115 : 2864524 : private->emode = emode;
129 alvherre@kurilemu.de 3116 :GNC 2864524 : private->randAccess = !XLogRecPtrIsValid(xlogreader->ReadRecPtr);
1488 heikki.linnakangas@i 3117 :CBC 2864524 : private->replayTLI = replayTLI;
3118 : :
3119 : : /* This is the first attempt to read this page. */
3120 : 2864524 : lastSourceFailed = false;
3121 : :
3122 : : for (;;)
3123 : 137 : {
3124 : : char *errormsg;
3125 : :
1438 tmunro@postgresql.or 3126 : 2864661 : record = XLogPrefetcherReadRecord(xlogprefetcher, &errormsg);
1488 heikki.linnakangas@i 3127 [ + + ]: 2864603 : if (record == NULL)
3128 : : {
3129 : : /*
3130 : : * When we find that WAL ends in an incomplete record, keep track
3131 : : * of that record. After recovery is done, we'll write a record
3132 : : * to indicate to downstream WAL readers that that portion is to
3133 : : * be ignored.
3134 : : *
3135 : : * However, when ArchiveRecoveryRequested = true, we're going to
3136 : : * switch to a new timeline at the end of recovery. We will only
3137 : : * copy WAL over to the new timeline up to the end of the last
3138 : : * complete record, so if we did this, we would later create an
3139 : : * overwrite contrecord in the wrong place, breaking everything.
3140 : : */
1294 rhaas@postgresql.org 3141 [ + + ]: 296 : if (!ArchiveRecoveryRequested &&
129 alvherre@kurilemu.de 3142 [ + + ]:GNC 110 : XLogRecPtrIsValid(xlogreader->abortedRecPtr))
3143 : : {
1488 heikki.linnakangas@i 3144 :CBC 12 : abortedRecPtr = xlogreader->abortedRecPtr;
3145 : 12 : missingContrecPtr = xlogreader->missingContrecPtr;
3146 : : }
3147 : :
3148 [ + + ]: 296 : if (readFile >= 0)
3149 : : {
3150 : 269 : close(readFile);
3151 : 269 : readFile = -1;
3152 : : }
3153 : :
3154 : : /*
3155 : : * We only end up here without a message when XLogPageRead()
3156 : : * failed - in that case we already logged something. In
3157 : : * StandbyMode that only happens if we have been triggered, so we
3158 : : * shouldn't loop anymore in that case.
3159 : : */
3160 [ + + ]: 296 : if (errormsg)
3161 [ + + ]: 269 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3162 : : (errmsg_internal("%s", errormsg) /* already translated */ ));
3163 : : }
3164 : :
3165 : : /*
3166 : : * Check page TLI is one of the expected values.
3167 : : */
3168 [ - + ]: 2864307 : else if (!tliInHistory(xlogreader->latestPageTLI, expectedTLEs))
3169 : : {
3170 : : char fname[MAXFNAMELEN];
3171 : : XLogSegNo segno;
3172 : : int32 offset;
3173 : :
1488 heikki.linnakangas@i 3174 :UBC 0 : XLByteToSeg(xlogreader->latestPagePtr, segno, wal_segment_size);
3175 : 0 : offset = XLogSegmentOffset(xlogreader->latestPagePtr,
3176 : : wal_segment_size);
3177 : 0 : XLogFileName(fname, xlogreader->seg.ws_tli, segno,
3178 : : wal_segment_size);
3179 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3180 : : errmsg("unexpected timeline ID %u in WAL segment %s, LSN %X/%08X, offset %u",
3181 : : xlogreader->latestPageTLI,
3182 : : fname,
3183 : : LSN_FORMAT_ARGS(xlogreader->latestPagePtr),
3184 : : offset));
3185 : 0 : record = NULL;
3186 : : }
3187 : :
1488 heikki.linnakangas@i 3188 [ + + ]:CBC 2864603 : if (record)
3189 : : {
3190 : : /* Great, got a record */
3191 : 2864466 : return record;
3192 : : }
3193 : : else
3194 : : {
3195 : : /* No valid record available from this source */
3196 : 296 : lastSourceFailed = true;
3197 : :
3198 : : /*
3199 : : * If archive recovery was requested, but we were still doing
3200 : : * crash recovery, switch to archive recovery and retry using the
3201 : : * offline archive. We have now replayed all the valid WAL in
3202 : : * pg_wal, so we are presumably now consistent.
3203 : : *
3204 : : * We require that there's at least some valid WAL present in
3205 : : * pg_wal, however (!fetching_ckpt). We could recover using the
3206 : : * WAL from the archive, even if pg_wal is completely empty, but
3207 : : * we'd have no idea how far we'd have to replay to reach
3208 : : * consistency. So err on the safe side and give up.
3209 : : */
3210 [ + + + + ]: 296 : if (!InArchiveRecovery && ArchiveRecoveryRequested &&
3211 [ + - ]: 1 : !fetching_ckpt)
3212 : : {
3213 [ - + ]: 1 : ereport(DEBUG1,
3214 : : (errmsg_internal("reached end of WAL in pg_wal, entering archive recovery")));
3215 : 1 : InArchiveRecovery = true;
3216 [ + - ]: 1 : if (StandbyModeRequested)
1133 rhaas@postgresql.org 3217 : 1 : EnableStandbyMode();
3218 : :
1488 heikki.linnakangas@i 3219 : 1 : SwitchIntoArchiveRecovery(xlogreader->EndRecPtr, replayTLI);
3220 : 1 : minRecoveryPoint = xlogreader->EndRecPtr;
3221 : 1 : minRecoveryPointTLI = replayTLI;
3222 : :
3223 : 1 : CheckRecoveryConsistency();
3224 : :
3225 : : /*
3226 : : * Before we retry, reset lastSourceFailed and currentSource
3227 : : * so that we will check the archive next.
3228 : : */
3229 : 1 : lastSourceFailed = false;
3230 : 1 : currentSource = XLOG_FROM_ANY;
3231 : :
3232 : 137 : continue;
3233 : : }
3234 : :
3235 : : /* In standby mode, loop back to retry. Otherwise, give up. */
3236 [ + + + + ]: 295 : if (StandbyMode && !CheckForStandbyTrigger())
3237 : 136 : continue;
3238 : : else
3239 : 159 : return NULL;
3240 : : }
3241 : : }
3242 : : }
3243 : :
3244 : : /*
3245 : : * Read the XLOG page containing targetPagePtr into readBuf (if not read
3246 : : * already). Returns number of bytes read, if the page is read successfully,
3247 : : * or XLREAD_FAIL in case of errors. When errors occur, they are ereport'ed,
3248 : : * but only if they have not been previously reported.
3249 : : *
3250 : : * See XLogReaderRoutine.page_read for more details.
3251 : : *
3252 : : * While prefetching, xlogreader->nonblocking may be set. In that case,
3253 : : * returns XLREAD_WOULDBLOCK if we'd otherwise have to wait for more WAL.
3254 : : *
3255 : : * This is responsible for restoring files from archive as needed, as well
3256 : : * as for waiting for the requested WAL record to arrive in standby mode.
3257 : : *
3258 : : * xlogreader->private_data->emode specifies the log level used for reporting
3259 : : * "file not found" or "end of WAL" situations in archive recovery, or in
3260 : : * standby mode when promotion is triggered. If set to WARNING or below,
3261 : : * XLogPageRead() returns XLREAD_FAIL in those situations, on higher log
3262 : : * levels the ereport() won't return.
3263 : : *
3264 : : * In standby mode, if after a successful return of XLogPageRead() the
3265 : : * caller finds the record it's interested in to be broken, it should
3266 : : * ereport the error with the level determined by
3267 : : * emode_for_corrupt_record(), and then set lastSourceFailed
3268 : : * and call XLogPageRead() again with the same arguments. This lets
3269 : : * XLogPageRead() to try fetching the record from another source, or to
3270 : : * sleep and retry.
3271 : : */
3272 : : static int
3273 : 1465085 : XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr, int reqLen,
3274 : : XLogRecPtr targetRecPtr, char *readBuf)
3275 : : {
3276 : 1465085 : XLogPageReadPrivate *private =
3277 : : (XLogPageReadPrivate *) xlogreader->private_data;
3278 : 1465085 : int emode = private->emode;
3279 : : uint32 targetPageOff;
3280 : : XLogSegNo targetSegNo PG_USED_FOR_ASSERTS_ONLY;
3281 : : int r;
3282 : : instr_time io_start;
3283 : :
130 michael@paquier.xyz 3284 [ + + - + ]:GNC 1465085 : Assert(AmStartupProcess() || !IsUnderPostmaster);
3285 : :
1488 heikki.linnakangas@i 3286 :CBC 1465085 : XLByteToSeg(targetPagePtr, targetSegNo, wal_segment_size);
3287 : 1465085 : targetPageOff = XLogSegmentOffset(targetPagePtr, wal_segment_size);
3288 : :
3289 : : /*
3290 : : * See if we need to switch to a new segment because the requested record
3291 : : * is not in the currently open one.
3292 : : */
3293 [ + + ]: 1465085 : if (readFile >= 0 &&
3294 [ + + ]: 1463431 : !XLByteInSeg(targetPagePtr, readSegNo, wal_segment_size))
3295 : : {
3296 : : /*
3297 : : * Request a restartpoint if we've replayed too much xlog since the
3298 : : * last one.
3299 : : */
3300 [ + + + - ]: 1382 : if (ArchiveRecoveryRequested && IsUnderPostmaster)
3301 : : {
3302 [ + + ]: 1365 : if (XLogCheckpointNeeded(readSegNo))
3303 : : {
3304 : 1248 : (void) GetRedoRecPtr();
3305 [ + + ]: 1248 : if (XLogCheckpointNeeded(readSegNo))
3306 : 1238 : RequestCheckpoint(CHECKPOINT_CAUSE_XLOG);
3307 : : }
3308 : : }
3309 : :
3310 : 1382 : close(readFile);
3311 : 1382 : readFile = -1;
3312 : 1382 : readSource = XLOG_FROM_ANY;
3313 : : }
3314 : :
3315 : 1465085 : XLByteToSeg(targetPagePtr, readSegNo, wal_segment_size);
3316 : :
3317 : 1465087 : retry:
3318 : : /* See if we need to retrieve more data */
3319 [ + + ]: 1465087 : if (readFile < 0 ||
3320 [ + + ]: 1462049 : (readSource == XLOG_FROM_STREAM &&
3321 [ + + ]: 1449685 : flushedUpto < targetPagePtr + reqLen))
3322 : : {
1438 tmunro@postgresql.or 3323 [ + + ]: 26271 : if (readFile >= 0 &&
3324 [ + + ]: 23233 : xlogreader->nonblocking &&
3325 [ + - ]: 11475 : readSource == XLOG_FROM_STREAM &&
3326 [ + - ]: 11475 : flushedUpto < targetPagePtr + reqLen)
3327 : 11475 : return XLREAD_WOULDBLOCK;
3328 : :
3329 [ + + + - ]: 14738 : switch (WaitForWALToBecomeAvailable(targetPagePtr + reqLen,
3330 : 14796 : private->randAccess,
3331 : 14796 : private->fetching_ckpt,
3332 : : targetRecPtr,
3333 : : private->replayTLI,
3334 : : xlogreader->EndRecPtr,
3335 : 14796 : xlogreader->nonblocking))
3336 : : {
3337 : 332 : case XLREAD_WOULDBLOCK:
3338 : 332 : return XLREAD_WOULDBLOCK;
3339 : 52 : case XLREAD_FAIL:
3340 [ - + ]: 52 : if (readFile >= 0)
1438 tmunro@postgresql.or 3341 :UBC 0 : close(readFile);
1438 tmunro@postgresql.or 3342 :CBC 52 : readFile = -1;
3343 : 52 : readLen = 0;
3344 : 52 : readSource = XLOG_FROM_ANY;
3345 : 52 : return XLREAD_FAIL;
3346 : 14354 : case XLREAD_SUCCESS:
3347 : 14354 : break;
3348 : : }
3349 : : }
3350 : :
3351 : : /*
3352 : : * At this point, we have the right segment open and if we're streaming we
3353 : : * know the requested record is in it.
3354 : : */
1488 heikki.linnakangas@i 3355 [ - + ]: 1453170 : Assert(readFile != -1);
3356 : :
3357 : : /*
3358 : : * If the current segment is being streamed from the primary, calculate
3359 : : * how much of the current page we have received already. We know the
3360 : : * requested record has been received, but this is for the benefit of
3361 : : * future calls, to allow quick exit at the top of this function.
3362 : : */
3363 [ + + ]: 1453170 : if (readSource == XLOG_FROM_STREAM)
3364 : : {
3365 [ + + ]: 1439161 : if (((targetPagePtr) / XLOG_BLCKSZ) != (flushedUpto / XLOG_BLCKSZ))
3366 : 1429946 : readLen = XLOG_BLCKSZ;
3367 : : else
3368 : 9215 : readLen = XLogSegmentOffset(flushedUpto, wal_segment_size) -
3369 : : targetPageOff;
3370 : : }
3371 : : else
3372 : 14009 : readLen = XLOG_BLCKSZ;
3373 : :
3374 : : /* Read the requested page */
3375 : 1453170 : readOff = targetPageOff;
3376 : :
3377 : : /* Measure I/O timing when reading segment */
382 michael@paquier.xyz 3378 : 1453170 : io_start = pgstat_prepare_io_time(track_wal_io_timing);
3379 : :
1488 heikki.linnakangas@i 3380 : 1453170 : pgstat_report_wait_start(WAIT_EVENT_WAL_READ);
122 michael@paquier.xyz 3381 :GNC 1453170 : r = pg_pread(readFile, readBuf, XLOG_BLCKSZ, (pgoff_t) readOff);
1488 heikki.linnakangas@i 3382 [ - + ]:CBC 1453170 : if (r != XLOG_BLCKSZ)
3383 : : {
3384 : : char fname[MAXFNAMELEN];
1488 heikki.linnakangas@i 3385 :UBC 0 : int save_errno = errno;
3386 : :
3387 : 0 : pgstat_report_wait_end();
3388 : :
404 michael@paquier.xyz 3389 : 0 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3390 : : io_start, 1, r);
3391 : :
1488 heikki.linnakangas@i 3392 : 0 : XLogFileName(fname, curFileTLI, readSegNo, wal_segment_size);
3393 [ # # ]: 0 : if (r < 0)
3394 : : {
3395 : 0 : errno = save_errno;
3396 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3397 : : (errcode_for_file_access(),
3398 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: %m",
3399 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3400 : : readOff)));
3401 : : }
3402 : : else
3403 [ # # ]: 0 : ereport(emode_for_corrupt_record(emode, targetPagePtr + reqLen),
3404 : : (errcode(ERRCODE_DATA_CORRUPTED),
3405 : : errmsg("could not read from WAL segment %s, LSN %X/%08X, offset %u: read %d of %zu",
3406 : : fname, LSN_FORMAT_ARGS(targetPagePtr),
3407 : : readOff, r, (Size) XLOG_BLCKSZ)));
3408 : 0 : goto next_record_is_invalid;
3409 : : }
1488 heikki.linnakangas@i 3410 :CBC 1453170 : pgstat_report_wait_end();
3411 : :
404 michael@paquier.xyz 3412 : 1453170 : pgstat_count_io_op_time(IOOBJECT_WAL, IOCONTEXT_NORMAL, IOOP_READ,
3413 : : io_start, 1, r);
3414 : :
1488 heikki.linnakangas@i 3415 [ - + ]: 1453170 : Assert(targetSegNo == readSegNo);
3416 [ - + ]: 1453170 : Assert(targetPageOff == readOff);
3417 [ - + ]: 1453170 : Assert(reqLen <= readLen);
3418 : :
3419 : 1453170 : xlogreader->seg.ws_tli = curFileTLI;
3420 : :
3421 : : /*
3422 : : * Check the page header immediately, so that we can retry immediately if
3423 : : * it's not valid. This may seem unnecessary, because ReadPageInternal()
3424 : : * validates the page header anyway, and would propagate the failure up to
3425 : : * ReadRecord(), which would retry. However, there's a corner case with
3426 : : * continuation records, if a record is split across two pages such that
3427 : : * we would need to read the two pages from different sources across two
3428 : : * WAL segments.
3429 : : *
3430 : : * The first page is only available locally, in pg_wal, because it's
3431 : : * already been recycled on the primary. The second page, however, is not
3432 : : * present in pg_wal, and we should stream it from the primary. There is a
3433 : : * recycled WAL segment present in pg_wal, with garbage contents, however.
3434 : : * We would read the first page from the local WAL segment, but when
3435 : : * reading the second page, we would read the bogus, recycled, WAL
3436 : : * segment. If we didn't catch that case here, we would never recover,
3437 : : * because ReadRecord() would retry reading the whole record from the
3438 : : * beginning.
3439 : : *
3440 : : * Of course, this only catches errors in the page header, which is what
3441 : : * happens in the case of a recycled WAL segment. Other kinds of errors or
3442 : : * corruption still has the same problem. But this at least fixes the
3443 : : * common case, which can happen as part of normal operation.
3444 : : *
3445 : : * Validating the page header is cheap enough that doing it twice
3446 : : * shouldn't be a big deal from a performance point of view.
3447 : : *
3448 : : * When not in standby mode, an invalid page header should cause recovery
3449 : : * to end, not retry reading the page, so we don't need to validate the
3450 : : * page header here for the retry. Instead, ReadPageInternal() is
3451 : : * responsible for the validation.
3452 : : */
3453 [ + + ]: 1453170 : if (StandbyMode &&
419 michael@paquier.xyz 3454 [ + + ]: 1442948 : (targetPagePtr % wal_segment_size) == 0 &&
1488 heikki.linnakangas@i 3455 [ + + ]: 1414 : !XLogReaderValidatePageHeader(xlogreader, targetPagePtr, readBuf))
3456 : : {
3457 : : /*
3458 : : * Emit this error right now then retry this page immediately. Use
3459 : : * errmsg_internal() because the message was already translated.
3460 : : */
3461 [ + - ]: 3 : if (xlogreader->errormsg_buf[0])
3462 [ + + ]: 3 : ereport(emode_for_corrupt_record(emode, xlogreader->EndRecPtr),
3463 : : (errmsg_internal("%s", xlogreader->errormsg_buf)));
3464 : :
3465 : : /* reset any error XLogReaderValidatePageHeader() might have set */
1289 tmunro@postgresql.or 3466 : 3 : XLogReaderResetError(xlogreader);
1488 heikki.linnakangas@i 3467 : 3 : goto next_record_is_invalid;
3468 : : }
3469 : :
3470 : 1453167 : return readLen;
3471 : :
3472 : 3 : next_record_is_invalid:
3473 : :
3474 : : /*
3475 : : * If we're reading ahead, give up fast. Retries and error reporting will
3476 : : * be handled by a later read when recovery catches up to this point.
3477 : : */
1289 tmunro@postgresql.or 3478 [ + + ]: 3 : if (xlogreader->nonblocking)
3479 : 1 : return XLREAD_WOULDBLOCK;
3480 : :
1488 heikki.linnakangas@i 3481 : 2 : lastSourceFailed = true;
3482 : :
3483 [ + - ]: 2 : if (readFile >= 0)
3484 : 2 : close(readFile);
3485 : 2 : readFile = -1;
3486 : 2 : readLen = 0;
3487 : 2 : readSource = XLOG_FROM_ANY;
3488 : :
3489 : : /* In standby-mode, keep trying */
3490 [ + - ]: 2 : if (StandbyMode)
3491 : 2 : goto retry;
3492 : : else
1438 tmunro@postgresql.or 3493 :UBC 0 : return XLREAD_FAIL;
3494 : : }
3495 : :
3496 : : /*
3497 : : * Open the WAL segment containing WAL location 'RecPtr'.
3498 : : *
3499 : : * The segment can be fetched via restore_command, or via walreceiver having
3500 : : * streamed the record, or it can already be present in pg_wal. Checking
3501 : : * pg_wal is mainly for crash recovery, but it will be polled in standby mode
3502 : : * too, in case someone copies a new segment directly to pg_wal. That is not
3503 : : * documented or recommended, though.
3504 : : *
3505 : : * If 'fetching_ckpt' is true, we're fetching a checkpoint record, and should
3506 : : * prepare to read WAL starting from RedoStartLSN after this.
3507 : : *
3508 : : * 'RecPtr' might not point to the beginning of the record we're interested
3509 : : * in, it might also point to the page or segment header. In that case,
3510 : : * 'tliRecPtr' is the position of the WAL record we're interested in. It is
3511 : : * used to decide which timeline to stream the requested WAL from.
3512 : : *
3513 : : * 'replayLSN' is the current replay LSN, so that if we scan for new
3514 : : * timelines, we can reject a switch to a timeline that branched off before
3515 : : * this point.
3516 : : *
3517 : : * If the record is not immediately available, the function returns XLREAD_FAIL
3518 : : * if we're not in standby mode. In standby mode, the function waits for it to
3519 : : * become available.
3520 : : *
3521 : : * When the requested record becomes available, the function opens the file
3522 : : * containing it (if not open already), and returns XLREAD_SUCCESS. When end
3523 : : * of standby mode is triggered by the user, and there is no more WAL
3524 : : * available, returns XLREAD_FAIL.
3525 : : *
3526 : : * If nonblocking is true, then give up immediately if we can't satisfy the
3527 : : * request, returning XLREAD_WOULDBLOCK instead of waiting.
3528 : : */
3529 : : static XLogPageReadResult
1488 heikki.linnakangas@i 3530 :CBC 14796 : WaitForWALToBecomeAvailable(XLogRecPtr RecPtr, bool randAccess,
3531 : : bool fetching_ckpt, XLogRecPtr tliRecPtr,
3532 : : TimeLineID replayTLI, XLogRecPtr replayLSN,
3533 : : bool nonblocking)
3534 : : {
3535 : : static TimestampTz last_fail_time = 0;
3536 : : TimestampTz now;
3537 : 14796 : bool streaming_reply_sent = false;
3538 : :
3539 : : /*-------
3540 : : * Standby mode is implemented by a state machine:
3541 : : *
3542 : : * 1. Read from either archive or pg_wal (XLOG_FROM_ARCHIVE), or just
3543 : : * pg_wal (XLOG_FROM_PG_WAL)
3544 : : * 2. Check for promotion trigger request
3545 : : * 3. Read from primary server via walreceiver (XLOG_FROM_STREAM)
3546 : : * 4. Rescan timelines
3547 : : * 5. Sleep wal_retrieve_retry_interval milliseconds, and loop back to 1.
3548 : : *
3549 : : * Failure to read from the current source advances the state machine to
3550 : : * the next state.
3551 : : *
3552 : : * 'currentSource' indicates the current state. There are no currentSource
3553 : : * values for "check trigger", "rescan timelines", and "sleep" states,
3554 : : * those actions are taken when reading from the previous source fails, as
3555 : : * part of advancing to the next state.
3556 : : *
3557 : : * If standby mode is turned off while reading WAL from stream, we move
3558 : : * to XLOG_FROM_ARCHIVE and reset lastSourceFailed, to force fetching
3559 : : * the files (which would be required at end of recovery, e.g., timeline
3560 : : * history file) from archive or pg_wal. We don't need to kill WAL receiver
3561 : : * here because it's already stopped when standby mode is turned off at
3562 : : * the end of recovery.
3563 : : *-------
3564 : : */
3565 [ + + ]: 14796 : if (!InArchiveRecovery)
3566 : 1004 : currentSource = XLOG_FROM_PG_WAL;
3567 [ + + ]: 13792 : else if (currentSource == XLOG_FROM_ANY ||
3568 [ + + - + ]: 13668 : (!StandbyMode && currentSource == XLOG_FROM_STREAM))
3569 : : {
3570 : 124 : lastSourceFailed = false;
3571 : 124 : currentSource = XLOG_FROM_ARCHIVE;
3572 : : }
3573 : :
3574 : : for (;;)
3575 : 12428 : {
3576 : 27224 : XLogSource oldSource = currentSource;
3577 : 27224 : bool startWalReceiver = false;
3578 : :
3579 : : /*
3580 : : * First check if we failed to read from the current source, and
3581 : : * advance the state machine if so. The failure to read might've
3582 : : * happened outside this function, e.g when a CRC check fails on a
3583 : : * record, or within this loop.
3584 : : */
3585 [ + + ]: 27224 : if (lastSourceFailed)
3586 : : {
3587 : : /*
3588 : : * Don't allow any retry loops to occur during nonblocking
3589 : : * readahead. Let the caller process everything that has been
3590 : : * decoded already first.
3591 : : */
1438 tmunro@postgresql.or 3592 [ + + ]: 525 : if (nonblocking)
3593 : 82 : return XLREAD_WOULDBLOCK;
3594 : :
1488 heikki.linnakangas@i 3595 [ + + - ]: 443 : switch (currentSource)
3596 : : {
3597 : 270 : case XLOG_FROM_ARCHIVE:
3598 : : case XLOG_FROM_PG_WAL:
3599 : :
3600 : : /*
3601 : : * Check to see if promotion is requested. Note that we do
3602 : : * this only after failure, so when you promote, we still
3603 : : * finish replaying as much as we can from archive and
3604 : : * pg_wal before failover.
3605 : : */
3606 [ + + + + ]: 270 : if (StandbyMode && CheckForStandbyTrigger())
3607 : : {
3608 : 22 : XLogShutdownWalRcv();
1438 tmunro@postgresql.or 3609 : 22 : return XLREAD_FAIL;
3610 : : }
3611 : :
3612 : : /*
3613 : : * Not in standby mode, and we've now tried the archive
3614 : : * and pg_wal.
3615 : : */
1488 heikki.linnakangas@i 3616 [ + + ]: 248 : if (!StandbyMode)
1438 tmunro@postgresql.or 3617 : 30 : return XLREAD_FAIL;
3618 : :
3619 : : /*
3620 : : * Move to XLOG_FROM_STREAM state, and set to start a
3621 : : * walreceiver if necessary.
3622 : : */
1488 heikki.linnakangas@i 3623 : 218 : currentSource = XLOG_FROM_STREAM;
3624 : 218 : startWalReceiver = true;
3625 : 218 : break;
3626 : :
3627 : 173 : case XLOG_FROM_STREAM:
3628 : :
3629 : : /*
3630 : : * Failure while streaming. Most likely, we got here
3631 : : * because streaming replication was terminated, or
3632 : : * promotion was triggered. But we also get here if we
3633 : : * find an invalid record in the WAL streamed from the
3634 : : * primary, in which case something is seriously wrong.
3635 : : * There's little chance that the problem will just go
3636 : : * away, but PANIC is not good for availability either,
3637 : : * especially in hot standby mode. So, we treat that the
3638 : : * same as disconnection, and retry from archive/pg_wal
3639 : : * again. The WAL in the archive should be identical to
3640 : : * what was streamed, so it's unlikely that it helps, but
3641 : : * one can hope...
3642 : : */
3643 : :
3644 : : /*
3645 : : * We should be able to move to XLOG_FROM_STREAM only in
3646 : : * standby mode.
3647 : : */
3648 [ - + ]: 173 : Assert(StandbyMode);
3649 : :
3650 : : /*
3651 : : * Before we leave XLOG_FROM_STREAM state, make sure that
3652 : : * walreceiver is not active, so that it won't overwrite
3653 : : * WAL that we restore from archive.
3654 : : *
3655 : : * If walreceiver is actively streaming (or attempting to
3656 : : * connect), we must shut it down. However, if it's
3657 : : * already in WAITING state (e.g., due to timeline
3658 : : * divergence), we only need to reset the install flag to
3659 : : * allow archive restoration.
3660 : : */
131 michael@paquier.xyz 3661 [ + + ]: 173 : if (WalRcvStreaming())
3662 : 33 : XLogShutdownWalRcv();
3663 : : else
3664 : : {
3665 : : /*
3666 : : * WALRCV_STOPPING state is a transient state while
3667 : : * the startup process is in ShutdownWalRcv(). It
3668 : : * should never appear here since we would be waiting
3669 : : * for the walreceiver to reach WALRCV_STOPPED in that
3670 : : * case.
3671 : : */
131 michael@paquier.xyz 3672 [ - + ]:GNC 140 : Assert(WalRcvGetState() != WALRCV_STOPPING);
131 michael@paquier.xyz 3673 :CBC 140 : ResetInstallXLogFileSegmentActive();
3674 : : }
3675 : :
3676 : : /*
3677 : : * Before we sleep, re-scan for possible new timelines if
3678 : : * we were requested to recover to the latest timeline.
3679 : : */
1488 heikki.linnakangas@i 3680 [ + - ]: 173 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_LATEST)
3681 : : {
3682 [ + + ]: 173 : if (rescanLatestTimeLine(replayTLI, replayLSN))
3683 : : {
3684 : 7 : currentSource = XLOG_FROM_ARCHIVE;
3685 : 7 : break;
3686 : : }
3687 : : }
3688 : :
3689 : : /*
3690 : : * XLOG_FROM_STREAM is the last state in our state
3691 : : * machine, so we've exhausted all the options for
3692 : : * obtaining the requested WAL. We're going to loop back
3693 : : * and retry from the archive, but if it hasn't been long
3694 : : * since last attempt, sleep wal_retrieve_retry_interval
3695 : : * milliseconds to avoid busy-waiting.
3696 : : */
3697 : 165 : now = GetCurrentTimestamp();
3698 [ + + ]: 165 : if (!TimestampDifferenceExceeds(last_fail_time, now,
3699 : : wal_retrieve_retry_interval))
3700 : : {
3701 : : long wait_time;
3702 : :
3703 : 176 : wait_time = wal_retrieve_retry_interval -
3704 : 88 : TimestampDifferenceMilliseconds(last_fail_time, now);
3705 : :
251 alvherre@kurilemu.de 3706 [ + - ]:GNC 88 : elog(LOG, "waiting for WAL to become available at %X/%08X",
3707 : : LSN_FORMAT_ARGS(RecPtr));
3708 : :
3709 : : /* Do background tasks that might benefit us later. */
1202 tgl@sss.pgh.pa.us 3710 :CBC 88 : KnownAssignedTransactionIdsIdleMaintenance();
3711 : :
1488 heikki.linnakangas@i 3712 : 88 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3713 : : WL_LATCH_SET | WL_TIMEOUT |
3714 : : WL_EXIT_ON_PM_DEATH,
3715 : : wait_time,
3716 : : WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL);
3717 : 88 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3718 : 88 : now = GetCurrentTimestamp();
3719 : :
3720 : : /* Handle interrupt signals of startup process */
375 3721 : 88 : ProcessStartupProcInterrupts();
3722 : : }
1488 3723 : 151 : last_fail_time = now;
3724 : 151 : currentSource = XLOG_FROM_ARCHIVE;
3725 : 151 : break;
3726 : :
1488 heikki.linnakangas@i 3727 :UBC 0 : default:
3728 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
3729 : : }
3730 : : }
1488 heikki.linnakangas@i 3731 [ + + ]:CBC 26699 : else if (currentSource == XLOG_FROM_PG_WAL)
3732 : : {
3733 : : /*
3734 : : * We just successfully read a file in pg_wal. We prefer files in
3735 : : * the archive over ones in pg_wal, so try the next file again
3736 : : * from the archive first.
3737 : : */
3738 [ - + ]: 998 : if (InArchiveRecovery)
1488 heikki.linnakangas@i 3739 :UBC 0 : currentSource = XLOG_FROM_ARCHIVE;
3740 : : }
3741 : :
1488 heikki.linnakangas@i 3742 [ + + ]:CBC 27075 : if (currentSource != oldSource)
3743 [ + + + - ]: 376 : elog(DEBUG2, "switched WAL source from %s to %s after %s",
3744 : : xlogSourceNames[oldSource], xlogSourceNames[currentSource],
3745 : : lastSourceFailed ? "failure" : "success");
3746 : :
3747 : : /*
3748 : : * We've now handled possible failure. Try to read from the chosen
3749 : : * source.
3750 : : */
3751 : 27075 : lastSourceFailed = false;
3752 : :
3753 [ + + - ]: 27075 : switch (currentSource)
3754 : : {
3755 : 1834 : case XLOG_FROM_ARCHIVE:
3756 : : case XLOG_FROM_PG_WAL:
3757 : :
3758 : : /*
3759 : : * WAL receiver must not be running when reading WAL from
3760 : : * archive or pg_wal.
3761 : : */
3762 [ - + ]: 1834 : Assert(!WalRcvStreaming());
3763 : :
3764 : : /* Close any old file we might have open. */
3765 [ + + ]: 1834 : if (readFile >= 0)
3766 : : {
3767 : 85 : close(readFile);
3768 : 85 : readFile = -1;
3769 : : }
3770 : : /* Reset curFileTLI if random fetch. */
3771 [ + + ]: 1834 : if (randAccess)
3772 : 1165 : curFileTLI = 0;
3773 : :
3774 : : /*
3775 : : * Try to restore the file from archive, or read an existing
3776 : : * file from pg_wal.
3777 : : */
551 michael@paquier.xyz 3778 : 1834 : readFile = XLogFileReadAnyTLI(readSegNo,
1488 heikki.linnakangas@i 3779 [ + + ]: 1834 : currentSource == XLOG_FROM_ARCHIVE ? XLOG_FROM_ANY :
3780 : : currentSource);
3781 [ + + ]: 1834 : if (readFile >= 0)
1438 tmunro@postgresql.or 3782 : 1645 : return XLREAD_SUCCESS; /* success! */
3783 : :
3784 : : /*
3785 : : * Nope, not found in archive or pg_wal.
3786 : : */
1488 heikki.linnakangas@i 3787 : 189 : lastSourceFailed = true;
3788 : 189 : break;
3789 : :
3790 : 25241 : case XLOG_FROM_STREAM:
3791 : : {
3792 : : bool havedata;
3793 : :
3794 : : /*
3795 : : * We should be able to move to XLOG_FROM_STREAM only in
3796 : : * standby mode.
3797 : : */
3798 [ - + ]: 25241 : Assert(StandbyMode);
3799 : :
3800 : : /*
3801 : : * First, shutdown walreceiver if its restart has been
3802 : : * requested -- but no point if we're already slated for
3803 : : * starting it.
3804 : : */
3805 [ + + + - ]: 25241 : if (pendingWalRcvRestart && !startWalReceiver)
3806 : : {
3807 : 7 : XLogShutdownWalRcv();
3808 : :
3809 : : /*
3810 : : * Re-scan for possible new timelines if we were
3811 : : * requested to recover to the latest timeline.
3812 : : */
3813 [ + - ]: 7 : if (recoveryTargetTimeLineGoal ==
3814 : : RECOVERY_TARGET_TIMELINE_LATEST)
3815 : 7 : rescanLatestTimeLine(replayTLI, replayLSN);
3816 : :
3817 : 7 : startWalReceiver = true;
3818 : : }
3819 : 25241 : pendingWalRcvRestart = false;
3820 : :
3821 : : /*
3822 : : * Launch walreceiver if needed.
3823 : : *
3824 : : * If fetching_ckpt is true, RecPtr points to the initial
3825 : : * checkpoint location. In that case, we use RedoStartLSN
3826 : : * as the streaming start position instead of RecPtr, so
3827 : : * that when we later jump backwards to start redo at
3828 : : * RedoStartLSN, we will have the logs streamed already.
3829 : : */
3830 [ + + + - ]: 25241 : if (startWalReceiver &&
3831 [ + + ]: 225 : PrimaryConnInfo && strcmp(PrimaryConnInfo, "") != 0)
3832 : : {
3833 : : XLogRecPtr ptr;
3834 : : TimeLineID tli;
3835 : :
3836 [ - + ]: 188 : if (fetching_ckpt)
3837 : : {
1488 heikki.linnakangas@i 3838 :UBC 0 : ptr = RedoStartLSN;
3839 : 0 : tli = RedoStartTLI;
3840 : : }
3841 : : else
3842 : : {
1488 heikki.linnakangas@i 3843 :CBC 188 : ptr = RecPtr;
3844 : :
3845 : : /*
3846 : : * Use the record begin position to determine the
3847 : : * TLI, rather than the position we're reading.
3848 : : */
3849 : 188 : tli = tliOfPointInHistory(tliRecPtr, expectedTLEs);
3850 : :
3851 [ + - - + ]: 188 : if (curFileTLI > 0 && tli < curFileTLI)
251 alvherre@kurilemu.de 3852 [ # # ]: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",
3853 : : LSN_FORMAT_ARGS(tliRecPtr),
3854 : : tli, curFileTLI);
3855 : : }
1488 heikki.linnakangas@i 3856 :CBC 188 : curFileTLI = tli;
3857 : 188 : SetInstallXLogFileSegmentActive();
3858 : 188 : RequestXLogStreaming(tli, ptr, PrimaryConnInfo,
3859 : : PrimarySlotName,
3860 : : wal_receiver_create_temp_slot);
45 alvherre@kurilemu.de 3861 :GNC 188 : flushedUpto = InvalidXLogRecPtr;
3862 : : }
3863 : :
3864 : : /*
3865 : : * Check if WAL receiver is active or wait to start up.
3866 : : */
1488 heikki.linnakangas@i 3867 [ + + ]:CBC 25241 : if (!WalRcvStreaming())
3868 : : {
3869 : 140 : lastSourceFailed = true;
3870 : 140 : break;
3871 : : }
3872 : :
3873 : : /*
3874 : : * Walreceiver is active, so see if new data has arrived.
3875 : : *
3876 : : * We only advance XLogReceiptTime when we obtain fresh
3877 : : * WAL from walreceiver and observe that we had already
3878 : : * processed everything before the most recent "chunk"
3879 : : * that it flushed to disk. In steady state where we are
3880 : : * keeping up with the incoming data, XLogReceiptTime will
3881 : : * be updated on each cycle. When we are behind,
3882 : : * XLogReceiptTime will not advance, so the grace time
3883 : : * allotted to conflicting queries will decrease.
3884 : : */
3885 [ + + ]: 25101 : if (RecPtr < flushedUpto)
3886 : 1622 : havedata = true;
3887 : : else
3888 : : {
3889 : : XLogRecPtr latestChunkStart;
3890 : :
3891 : 23479 : flushedUpto = GetWalRcvFlushRecPtr(&latestChunkStart, &receiveTLI);
3892 [ + + + - ]: 23479 : if (RecPtr < flushedUpto && receiveTLI == curFileTLI)
3893 : : {
3894 : 12155 : havedata = true;
3895 [ + + ]: 12155 : if (latestChunkStart <= RecPtr)
3896 : : {
3897 : 8996 : XLogReceiptTime = GetCurrentTimestamp();
3898 : 8996 : SetCurrentChunkStartTime(XLogReceiptTime);
3899 : : }
3900 : : }
3901 : : else
3902 : 11324 : havedata = false;
3903 : : }
3904 [ + + ]: 25101 : if (havedata)
3905 : : {
3906 : : /*
3907 : : * Great, streamed far enough. Open the file if it's
3908 : : * not open already. Also read the timeline history
3909 : : * file if we haven't initialized timeline history
3910 : : * yet; it should be streamed over and present in
3911 : : * pg_wal by now. Use XLOG_FROM_STREAM so that source
3912 : : * info is set correctly and XLogReceiptTime isn't
3913 : : * changed.
3914 : : *
3915 : : * NB: We must set readTimeLineHistory based on
3916 : : * recoveryTargetTLI, not receiveTLI. Normally they'll
3917 : : * be the same, but if recovery_target_timeline is
3918 : : * 'latest' and archiving is configured, then it's
3919 : : * possible that we managed to retrieve one or more
3920 : : * new timeline history files from the archive,
3921 : : * updating recoveryTargetTLI.
3922 : : */
3923 [ + + ]: 13777 : if (readFile < 0)
3924 : : {
3925 [ - + ]: 1068 : if (!expectedTLEs)
1488 heikki.linnakangas@i 3926 :UBC 0 : expectedTLEs = readTimeLineHistory(recoveryTargetTLI);
551 michael@paquier.xyz 3927 :CBC 1068 : readFile = XLogFileRead(readSegNo, receiveTLI,
3928 : : XLOG_FROM_STREAM, false);
1488 heikki.linnakangas@i 3929 [ - + ]: 1068 : Assert(readFile >= 0);
3930 : : }
3931 : : else
3932 : : {
3933 : : /* just make sure source info is correct... */
3934 : 12709 : readSource = XLOG_FROM_STREAM;
3935 : 12709 : XLogReceiptSource = XLOG_FROM_STREAM;
1438 tmunro@postgresql.or 3936 : 12709 : return XLREAD_SUCCESS;
3937 : : }
1488 heikki.linnakangas@i 3938 : 1068 : break;
3939 : : }
3940 : :
3941 : : /* In nonblocking mode, return rather than sleeping. */
1438 tmunro@postgresql.or 3942 [ + + ]: 11324 : if (nonblocking)
3943 : 250 : return XLREAD_WOULDBLOCK;
3944 : :
3945 : : /*
3946 : : * Data not here yet. Check for trigger, then wait for
3947 : : * walreceiver to wake us up when new WAL arrives.
3948 : : */
1488 heikki.linnakangas@i 3949 [ + + ]: 11074 : if (CheckForStandbyTrigger())
3950 : : {
3951 : : /*
3952 : : * Note that we don't return XLREAD_FAIL immediately
3953 : : * here. After being triggered, we still want to
3954 : : * replay all the WAL that was already streamed. It's
3955 : : * in pg_wal now, so we just treat this as a failure,
3956 : : * and the state machine will move on to replay the
3957 : : * streamed WAL from pg_wal, and then recheck the
3958 : : * trigger and exit replay.
3959 : : */
3960 : 33 : lastSourceFailed = true;
3961 : 33 : break;
3962 : : }
3963 : :
3964 : : /*
3965 : : * Since we have replayed everything we have received so
3966 : : * far and are about to start waiting for more WAL, let's
3967 : : * tell the upstream server our replay location now so
3968 : : * that pg_stat_replication doesn't show stale
3969 : : * information.
3970 : : */
3971 [ + + ]: 11041 : if (!streaming_reply_sent)
3972 : : {
3973 : 9473 : WalRcvForceReply();
3974 : 9473 : streaming_reply_sent = true;
3975 : : }
3976 : :
3977 : : /* Do any background tasks that might benefit us later. */
1202 tgl@sss.pgh.pa.us 3978 : 11041 : KnownAssignedTransactionIdsIdleMaintenance();
3979 : :
3980 : : /* Update pg_stat_recovery_prefetch before sleeping. */
1438 tmunro@postgresql.or 3981 : 11041 : XLogPrefetcherComputeStats(xlogprefetcher);
3982 : :
3983 : : /*
3984 : : * Wait for more WAL to arrive, when we will be woken
3985 : : * immediately by the WAL receiver.
3986 : : */
1488 heikki.linnakangas@i 3987 : 11041 : (void) WaitLatch(&XLogRecoveryCtl->recoveryWakeupLatch,
3988 : : WL_LATCH_SET | WL_EXIT_ON_PM_DEATH,
3989 : : -1L,
3990 : : WAIT_EVENT_RECOVERY_WAL_STREAM);
3991 : 11041 : ResetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
3992 : 11041 : break;
3993 : : }
3994 : :
1488 heikki.linnakangas@i 3995 :UBC 0 : default:
3996 [ # # ]: 0 : elog(ERROR, "unexpected WAL source %d", currentSource);
3997 : : }
3998 : :
3999 : : /*
4000 : : * Check for recovery pause here so that we can confirm more quickly
4001 : : * that a requested pause has actually taken effect.
4002 : : */
1488 heikki.linnakangas@i 4003 [ + + ]:CBC 12471 : if (((volatile XLogRecoveryCtlData *) XLogRecoveryCtl)->recoveryPauseState !=
4004 : : RECOVERY_NOT_PAUSED)
4005 : 3 : recoveryPausesHere(false);
4006 : :
4007 : : /*
4008 : : * This possibly-long loop needs to handle interrupts of startup
4009 : : * process.
4010 : : */
375 4011 : 12471 : ProcessStartupProcInterrupts();
4012 : : }
4013 : :
4014 : : return XLREAD_FAIL; /* not reached */
4015 : : }
4016 : :
4017 : :
4018 : : /*
4019 : : * Determine what log level should be used to report a corrupt WAL record
4020 : : * in the current WAL page, previously read by XLogPageRead().
4021 : : *
4022 : : * 'emode' is the error mode that would be used to report a file-not-found
4023 : : * or legitimate end-of-WAL situation. Generally, we use it as-is, but if
4024 : : * we're retrying the exact same record that we've tried previously, only
4025 : : * complain the first time to keep the noise down. However, we only do when
4026 : : * reading from pg_wal, because we don't expect any invalid records in archive
4027 : : * or in records streamed from the primary. Files in the archive should be complete,
4028 : : * and we should never hit the end of WAL because we stop and wait for more WAL
4029 : : * to arrive before replaying it.
4030 : : *
4031 : : * NOTE: This function remembers the RecPtr value it was last called with,
4032 : : * to suppress repeated messages about the same record. Only call this when
4033 : : * you are about to ereport(), or you might cause a later message to be
4034 : : * erroneously suppressed.
4035 : : */
4036 : : static int
1488 4037 : 272 : emode_for_corrupt_record(int emode, XLogRecPtr RecPtr)
4038 : : {
4039 : : static XLogRecPtr lastComplaint = InvalidXLogRecPtr;
4040 : :
4041 [ + + + - ]: 272 : if (readSource == XLOG_FROM_PG_WAL && emode == LOG)
4042 : : {
4043 [ + + ]: 269 : if (RecPtr == lastComplaint)
4044 : 68 : emode = DEBUG1;
4045 : : else
4046 : 201 : lastComplaint = RecPtr;
4047 : : }
4048 : 272 : return emode;
4049 : : }
4050 : :
4051 : :
4052 : : /*
4053 : : * Subroutine to try to fetch and validate a prior checkpoint record.
4054 : : */
4055 : : static XLogRecord *
1438 tmunro@postgresql.or 4056 : 1004 : ReadCheckpointRecord(XLogPrefetcher *xlogprefetcher, XLogRecPtr RecPtr,
4057 : : TimeLineID replayTLI)
4058 : : {
4059 : : XLogRecord *record;
4060 : : uint8 info;
4061 : :
1488 heikki.linnakangas@i 4062 [ - + ]: 1004 : Assert(xlogreader != NULL);
4063 : :
4064 [ - + ]: 1004 : if (!XRecOffIsValid(RecPtr))
4065 : : {
1334 fujii@postgresql.org 4066 [ # # ]:UBC 0 : ereport(LOG,
4067 : : (errmsg("invalid checkpoint location")));
1488 heikki.linnakangas@i 4068 : 0 : return NULL;
4069 : : }
4070 : :
1438 tmunro@postgresql.or 4071 :CBC 1004 : XLogPrefetcherBeginRead(xlogprefetcher, RecPtr);
4072 : 1004 : record = ReadRecord(xlogprefetcher, LOG, true, replayTLI);
4073 : :
1488 heikki.linnakangas@i 4074 [ + + ]: 1004 : if (record == NULL)
4075 : : {
1334 fujii@postgresql.org 4076 [ + - ]:GBC 1 : ereport(LOG,
4077 : : (errmsg("invalid checkpoint record")));
1488 heikki.linnakangas@i 4078 : 1 : return NULL;
4079 : : }
1488 heikki.linnakangas@i 4080 [ - + ]:CBC 1003 : if (record->xl_rmid != RM_XLOG_ID)
4081 : : {
1334 fujii@postgresql.org 4082 [ # # ]:UBC 0 : ereport(LOG,
4083 : : (errmsg("invalid resource manager ID in checkpoint record")));
1488 heikki.linnakangas@i 4084 : 0 : return NULL;
4085 : : }
1488 heikki.linnakangas@i 4086 :CBC 1003 : info = record->xl_info & ~XLR_INFO_MASK;
4087 [ + + - + ]: 1003 : if (info != XLOG_CHECKPOINT_SHUTDOWN &&
4088 : : info != XLOG_CHECKPOINT_ONLINE)
4089 : : {
1334 fujii@postgresql.org 4090 [ # # ]:UBC 0 : ereport(LOG,
4091 : : (errmsg("invalid xl_info in checkpoint record")));
1488 heikki.linnakangas@i 4092 : 0 : return NULL;
4093 : : }
1488 heikki.linnakangas@i 4094 [ - + ]:CBC 1003 : if (record->xl_tot_len != SizeOfXLogRecord + SizeOfXLogRecordDataHeaderShort + sizeof(CheckPoint))
4095 : : {
1334 fujii@postgresql.org 4096 [ # # ]:UBC 0 : ereport(LOG,
4097 : : (errmsg("invalid length of checkpoint record")));
1488 heikki.linnakangas@i 4098 : 0 : return NULL;
4099 : : }
1488 heikki.linnakangas@i 4100 :CBC 1003 : return record;
4101 : : }
4102 : :
4103 : : /*
4104 : : * Scan for new timelines that might have appeared in the archive since we
4105 : : * started recovery.
4106 : : *
4107 : : * If there are any, the function changes recovery target TLI to the latest
4108 : : * one and returns 'true'.
4109 : : */
4110 : : static bool
4111 : 180 : rescanLatestTimeLine(TimeLineID replayTLI, XLogRecPtr replayLSN)
4112 : : {
4113 : : List *newExpectedTLEs;
4114 : : bool found;
4115 : : ListCell *cell;
4116 : : TimeLineID newtarget;
4117 : 180 : TimeLineID oldtarget = recoveryTargetTLI;
4118 : 180 : TimeLineHistoryEntry *currentTle = NULL;
4119 : :
4120 : 180 : newtarget = findNewestTimeLine(recoveryTargetTLI);
4121 [ + + ]: 179 : if (newtarget == recoveryTargetTLI)
4122 : : {
4123 : : /* No new timelines found */
4124 : 172 : return false;
4125 : : }
4126 : :
4127 : : /*
4128 : : * Determine the list of expected TLIs for the new TLI
4129 : : */
4130 : :
4131 : 7 : newExpectedTLEs = readTimeLineHistory(newtarget);
4132 : :
4133 : : /*
4134 : : * If the current timeline is not part of the history of the new timeline,
4135 : : * we cannot proceed to it.
4136 : : */
4137 : 7 : found = false;
4138 [ + - + - : 14 : foreach(cell, newExpectedTLEs)
+ - ]
4139 : : {
4140 : 14 : currentTle = (TimeLineHistoryEntry *) lfirst(cell);
4141 : :
4142 [ + + ]: 14 : if (currentTle->tli == recoveryTargetTLI)
4143 : : {
4144 : 7 : found = true;
4145 : 7 : break;
4146 : : }
4147 : : }
4148 [ - + ]: 7 : if (!found)
4149 : : {
1488 heikki.linnakangas@i 4150 [ # # ]:UBC 0 : ereport(LOG,
4151 : : (errmsg("new timeline %u is not a child of database system timeline %u",
4152 : : newtarget,
4153 : : replayTLI)));
4154 : 0 : return false;
4155 : : }
4156 : :
4157 : : /*
4158 : : * The current timeline was found in the history file, but check that the
4159 : : * next timeline was forked off from it *after* the current recovery
4160 : : * location.
4161 : : */
1488 heikki.linnakangas@i 4162 [ - + ]:CBC 7 : if (currentTle->end < replayLSN)
4163 : : {
1488 heikki.linnakangas@i 4164 [ # # ]:UBC 0 : ereport(LOG,
4165 : : errmsg("new timeline %u forked off current database system timeline %u before current recovery point %X/%08X",
4166 : : newtarget,
4167 : : replayTLI,
4168 : : LSN_FORMAT_ARGS(replayLSN)));
4169 : 0 : return false;
4170 : : }
4171 : :
4172 : : /* The new timeline history seems valid. Switch target */
1488 heikki.linnakangas@i 4173 :CBC 7 : recoveryTargetTLI = newtarget;
4174 : 7 : list_free_deep(expectedTLEs);
4175 : 7 : expectedTLEs = newExpectedTLEs;
4176 : :
4177 : : /*
4178 : : * As in StartupXLOG(), try to ensure we have all the history files
4179 : : * between the old target and new target in pg_wal.
4180 : : */
4181 : 7 : restoreTimeLineHistoryFiles(oldtarget + 1, newtarget);
4182 : :
4183 [ + - ]: 7 : ereport(LOG,
4184 : : (errmsg("new target timeline is %u",
4185 : : recoveryTargetTLI)));
4186 : :
4187 : 7 : return true;
4188 : : }
4189 : :
4190 : :
4191 : : /*
4192 : : * Open a logfile segment for reading (during recovery).
4193 : : *
4194 : : * If source == XLOG_FROM_ARCHIVE, the segment is retrieved from archive.
4195 : : * Otherwise, it's assumed to be already available in pg_wal.
4196 : : */
4197 : : static int
551 michael@paquier.xyz 4198 : 3398 : XLogFileRead(XLogSegNo segno, TimeLineID tli,
4199 : : XLogSource source, bool notfoundOk)
4200 : : {
4201 : : char xlogfname[MAXFNAMELEN];
4202 : : char activitymsg[MAXFNAMELEN + 16];
4203 : : char path[MAXPGPATH];
4204 : : int fd;
4205 : :
1488 heikki.linnakangas@i 4206 : 3398 : XLogFileName(xlogfname, tli, segno, wal_segment_size);
4207 : :
4208 [ + + - ]: 3398 : switch (source)
4209 : : {
4210 : 847 : case XLOG_FROM_ARCHIVE:
4211 : : /* Report recovery progress in PS display */
4212 : 847 : snprintf(activitymsg, sizeof(activitymsg), "waiting for %s",
4213 : : xlogfname);
4214 : 847 : set_ps_display(activitymsg);
4215 : :
4216 [ + + ]: 847 : if (!RestoreArchivedFile(path, xlogfname,
4217 : : "RECOVERYXLOG",
4218 : : wal_segment_size,
4219 : : InRedo))
4220 : 485 : return -1;
4221 : 362 : break;
4222 : :
4223 : 2551 : case XLOG_FROM_PG_WAL:
4224 : : case XLOG_FROM_STREAM:
4225 : 2551 : XLogFilePath(path, tli, segno, wal_segment_size);
4226 : 2551 : break;
4227 : :
1488 heikki.linnakangas@i 4228 :UBC 0 : default:
4229 [ # # ]: 0 : elog(ERROR, "invalid XLogFileRead source %d", source);
4230 : : }
4231 : :
4232 : : /*
4233 : : * If the segment was fetched from archival storage, replace the existing
4234 : : * xlog segment (if any) with the archival version.
4235 : : */
1488 heikki.linnakangas@i 4236 [ + + ]:CBC 2913 : if (source == XLOG_FROM_ARCHIVE)
4237 : : {
4238 [ - + ]: 362 : Assert(!IsInstallXLogFileSegmentActive());
4239 : 362 : KeepFileRestoredFromArchive(path, xlogfname);
4240 : :
4241 : : /*
4242 : : * Set path to point at the new file in pg_wal.
4243 : : */
4244 : 362 : snprintf(path, MAXPGPATH, XLOGDIR "/%s", xlogfname);
4245 : : }
4246 : :
4247 : 2913 : fd = BasicOpenFile(path, O_RDONLY | PG_BINARY);
4248 [ + + ]: 2913 : if (fd >= 0)
4249 : : {
4250 : : /* Success! */
4251 : 2713 : curFileTLI = tli;
4252 : :
4253 : : /* Report recovery progress in PS display */
4254 : 2713 : snprintf(activitymsg, sizeof(activitymsg), "recovering %s",
4255 : : xlogfname);
4256 : 2713 : set_ps_display(activitymsg);
4257 : :
4258 : : /* Track source of data in assorted state variables */
4259 : 2713 : readSource = source;
4260 : 2713 : XLogReceiptSource = source;
4261 : : /* In FROM_STREAM case, caller tracks receipt time, not me */
4262 [ + + ]: 2713 : if (source != XLOG_FROM_STREAM)
4263 : 1645 : XLogReceiptTime = GetCurrentTimestamp();
4264 : :
4265 : 2713 : return fd;
4266 : : }
4267 [ + - - + ]: 200 : if (errno != ENOENT || !notfoundOk) /* unexpected failure? */
1488 heikki.linnakangas@i 4268 [ # # ]:UBC 0 : ereport(PANIC,
4269 : : (errcode_for_file_access(),
4270 : : errmsg("could not open file \"%s\": %m", path)));
1488 heikki.linnakangas@i 4271 :CBC 200 : return -1;
4272 : : }
4273 : :
4274 : : /*
4275 : : * Open a logfile segment for reading (during recovery).
4276 : : *
4277 : : * This version searches for the segment with any TLI listed in expectedTLEs.
4278 : : */
4279 : : static int
551 michael@paquier.xyz 4280 : 1834 : XLogFileReadAnyTLI(XLogSegNo segno, XLogSource source)
4281 : : {
4282 : : char path[MAXPGPATH];
4283 : : ListCell *cell;
4284 : : int fd;
4285 : : List *tles;
4286 : :
4287 : : /*
4288 : : * Loop looking for a suitable timeline ID: we might need to read any of
4289 : : * the timelines listed in expectedTLEs.
4290 : : *
4291 : : * We expect curFileTLI on entry to be the TLI of the preceding file in
4292 : : * sequence, or 0 if there was no predecessor. We do not allow curFileTLI
4293 : : * to go backwards; this prevents us from picking up the wrong file when a
4294 : : * parent timeline extends to higher segment numbers than the child we
4295 : : * want to read.
4296 : : *
4297 : : * If we haven't read the timeline history file yet, read it now, so that
4298 : : * we know which TLIs to scan. We don't save the list in expectedTLEs,
4299 : : * however, unless we actually find a valid segment. That way if there is
4300 : : * neither a timeline history file nor a WAL segment in the archive, and
4301 : : * streaming replication is set up, we'll read the timeline history file
4302 : : * streamed from the primary when we start streaming, instead of
4303 : : * recovering with a dummy history generated here.
4304 : : */
1488 heikki.linnakangas@i 4305 [ + + ]: 1834 : if (expectedTLEs)
4306 : 830 : tles = expectedTLEs;
4307 : : else
4308 : 1004 : tles = readTimeLineHistory(recoveryTargetTLI);
4309 : :
4310 [ + - + + : 2041 : foreach(cell, tles)
+ + ]
4311 : : {
4312 : 1858 : TimeLineHistoryEntry *hent = (TimeLineHistoryEntry *) lfirst(cell);
4313 : 1858 : TimeLineID tli = hent->tli;
4314 : :
4315 [ + + ]: 1858 : if (tli < curFileTLI)
4316 : 6 : break; /* don't bother looking at too-old TLIs */
4317 : :
4318 : : /*
4319 : : * Skip scanning the timeline ID that the logfile segment to read
4320 : : * doesn't belong to
4321 : : */
129 alvherre@kurilemu.de 4322 [ + + ]:GNC 1852 : if (XLogRecPtrIsValid(hent->begin))
4323 : : {
1488 heikki.linnakangas@i 4324 :CBC 78 : XLogSegNo beginseg = 0;
4325 : :
4326 : 78 : XLByteToSeg(hent->begin, beginseg, wal_segment_size);
4327 : :
4328 : : /*
4329 : : * The logfile segment that doesn't belong to the timeline is
4330 : : * older or newer than the segment that the timeline started or
4331 : : * ended at, respectively. It's sufficient to check only the
4332 : : * starting segment of the timeline here. Since the timelines are
4333 : : * scanned in descending order in this loop, any segments newer
4334 : : * than the ending segment should belong to newer timeline and
4335 : : * have already been read before. So it's not necessary to check
4336 : : * the ending segment of the timeline here.
4337 : : */
4338 [ + + ]: 78 : if (segno < beginseg)
4339 : 7 : continue;
4340 : : }
4341 : :
4342 [ + + - + ]: 1845 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_ARCHIVE)
4343 : : {
551 michael@paquier.xyz 4344 : 847 : fd = XLogFileRead(segno, tli, XLOG_FROM_ARCHIVE, true);
1488 heikki.linnakangas@i 4345 [ + + ]: 847 : if (fd != -1)
4346 : : {
4347 [ - + ]: 362 : elog(DEBUG1, "got WAL segment from archive");
4348 [ + + ]: 362 : if (!expectedTLEs)
4349 : 18 : expectedTLEs = tles;
4350 : 1645 : return fd;
4351 : : }
4352 : : }
4353 : :
4354 [ + + + - ]: 1483 : if (source == XLOG_FROM_ANY || source == XLOG_FROM_PG_WAL)
4355 : : {
551 michael@paquier.xyz 4356 : 1483 : fd = XLogFileRead(segno, tli, XLOG_FROM_PG_WAL, true);
1488 heikki.linnakangas@i 4357 [ + + ]: 1483 : if (fd != -1)
4358 : : {
4359 [ + + ]: 1283 : if (!expectedTLEs)
4360 : 985 : expectedTLEs = tles;
4361 : 1283 : return fd;
4362 : : }
4363 : : }
4364 : : }
4365 : :
4366 : : /* Couldn't find it. For simplicity, complain about front timeline */
4367 : 189 : XLogFilePath(path, recoveryTargetTLI, segno, wal_segment_size);
4368 : 189 : errno = ENOENT;
551 michael@paquier.xyz 4369 [ + + ]: 189 : ereport(DEBUG2,
4370 : : (errcode_for_file_access(),
4371 : : errmsg("could not open file \"%s\": %m", path)));
1488 heikki.linnakangas@i 4372 : 189 : return -1;
4373 : : }
4374 : :
4375 : : /*
4376 : : * Set flag to signal the walreceiver to restart. (The startup process calls
4377 : : * this on noticing a relevant configuration change.)
4378 : : */
4379 : : void
4380 : 11 : StartupRequestWalReceiverRestart(void)
4381 : : {
4382 [ + - + + ]: 11 : if (currentSource == XLOG_FROM_STREAM && WalRcvRunning())
4383 : : {
4384 [ + - ]: 7 : ereport(LOG,
4385 : : (errmsg("WAL receiver process shutdown requested")));
4386 : :
4387 : 7 : pendingWalRcvRestart = true;
4388 : : }
4389 : 11 : }
4390 : :
4391 : :
4392 : : /*
4393 : : * Has a standby promotion already been triggered?
4394 : : *
4395 : : * Unlike CheckForStandbyTrigger(), this works in any process
4396 : : * that's connected to shared memory.
4397 : : */
4398 : : bool
4399 : 72 : PromoteIsTriggered(void)
4400 : : {
4401 : : /*
4402 : : * We check shared state each time only until a standby promotion is
4403 : : * triggered. We can't trigger a promotion again, so there's no need to
4404 : : * keep checking after the shared variable has once been seen true.
4405 : : */
4406 [ + + ]: 72 : if (LocalPromoteIsTriggered)
4407 : 51 : return true;
4408 : :
4409 [ - + ]: 21 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4410 : 21 : LocalPromoteIsTriggered = XLogRecoveryCtl->SharedPromoteIsTriggered;
4411 : 21 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4412 : :
4413 : 21 : return LocalPromoteIsTriggered;
4414 : : }
4415 : :
4416 : : static void
4417 : 48 : SetPromoteIsTriggered(void)
4418 : : {
4419 [ - + ]: 48 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4420 : 48 : XLogRecoveryCtl->SharedPromoteIsTriggered = true;
4421 : 48 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4422 : :
4423 : : /*
4424 : : * Mark the recovery pause state as 'not paused' because the paused state
4425 : : * ends and promotion continues if a promotion is triggered while recovery
4426 : : * is paused. Otherwise pg_get_wal_replay_pause_state() can mistakenly
4427 : : * return 'paused' while a promotion is ongoing.
4428 : : */
4429 : 48 : SetRecoveryPause(false);
4430 : :
4431 : 48 : LocalPromoteIsTriggered = true;
4432 : 48 : }
4433 : :
4434 : : /*
4435 : : * Check whether a promote request has arrived.
4436 : : */
4437 : : static bool
4438 : 11625 : CheckForStandbyTrigger(void)
4439 : : {
4440 [ + + ]: 11625 : if (LocalPromoteIsTriggered)
4441 : 56 : return true;
4442 : :
4443 [ + + + - ]: 11569 : if (IsPromoteSignaled() && CheckPromoteSignal())
4444 : : {
4445 [ + - ]: 48 : ereport(LOG, (errmsg("received promote request")));
4446 : 48 : RemovePromoteSignalFiles();
4447 : 48 : ResetPromoteSignaled();
4448 : 48 : SetPromoteIsTriggered();
4449 : 48 : return true;
4450 : : }
4451 : :
4452 : 11521 : return false;
4453 : : }
4454 : :
4455 : : /*
4456 : : * Remove the files signaling a standby promotion request.
4457 : : */
4458 : : void
4459 : 970 : RemovePromoteSignalFiles(void)
4460 : : {
4461 : 970 : unlink(PROMOTE_SIGNAL_FILE);
4462 : 970 : }
4463 : :
4464 : : /*
4465 : : * Check to see if a promote request has arrived.
4466 : : */
4467 : : bool
4468 : 800 : CheckPromoteSignal(void)
4469 : : {
4470 : : struct stat stat_buf;
4471 : :
4472 [ + + ]: 800 : if (stat(PROMOTE_SIGNAL_FILE, &stat_buf) == 0)
4473 : 96 : return true;
4474 : :
4475 : 704 : return false;
4476 : : }
4477 : :
4478 : : /*
4479 : : * Wake up startup process to replay newly arrived WAL, or to notice that
4480 : : * failover has been requested.
4481 : : */
4482 : : void
4483 : 39654 : WakeupRecovery(void)
4484 : : {
4485 : 39654 : SetLatch(&XLogRecoveryCtl->recoveryWakeupLatch);
4486 : 39654 : }
4487 : :
4488 : : /*
4489 : : * Schedule a walreceiver wakeup in the main recovery loop.
4490 : : */
4491 : : void
4492 : 2 : XLogRequestWalReceiverReply(void)
4493 : : {
4494 : 2 : doRequestWalReceiverReply = true;
4495 : 2 : }
4496 : :
4497 : : /*
4498 : : * Is HotStandby active yet? This is only important in special backends
4499 : : * since normal backends won't ever be able to connect until this returns
4500 : : * true. Postmaster knows this by way of signal, not via shared memory.
4501 : : *
4502 : : * Unlike testing standbyState, this works in any process that's connected to
4503 : : * shared memory. (And note that standbyState alone doesn't tell the truth
4504 : : * anyway.)
4505 : : */
4506 : : bool
4507 : 167 : HotStandbyActive(void)
4508 : : {
4509 : : /*
4510 : : * We check shared state each time only until Hot Standby is active. We
4511 : : * can't de-activate Hot Standby, so there's no need to keep checking
4512 : : * after the shared variable has once been seen true.
4513 : : */
4514 [ + + ]: 167 : if (LocalHotStandbyActive)
4515 : 22 : return true;
4516 : : else
4517 : : {
4518 : : /* spinlock is essential on machines with weak memory ordering! */
4519 [ - + ]: 145 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4520 : 145 : LocalHotStandbyActive = XLogRecoveryCtl->SharedHotStandbyActive;
4521 : 145 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4522 : :
4523 : 145 : return LocalHotStandbyActive;
4524 : : }
4525 : : }
4526 : :
4527 : : /*
4528 : : * Like HotStandbyActive(), but to be used only in WAL replay code,
4529 : : * where we don't need to ask any other process what the state is.
4530 : : */
4531 : : static bool
1488 heikki.linnakangas@i 4532 :UBC 0 : HotStandbyActiveInReplay(void)
4533 : : {
4534 [ # # # # ]: 0 : Assert(AmStartupProcess() || !IsPostmasterEnvironment);
4535 : 0 : return LocalHotStandbyActive;
4536 : : }
4537 : :
4538 : : /*
4539 : : * Get latest redo apply position.
4540 : : *
4541 : : * Exported to allow WALReceiver to read the pointer directly.
4542 : : */
4543 : : XLogRecPtr
1488 heikki.linnakangas@i 4544 :CBC 97308 : GetXLogReplayRecPtr(TimeLineID *replayTLI)
4545 : : {
4546 : : XLogRecPtr recptr;
4547 : : TimeLineID tli;
4548 : :
4549 [ + + ]: 97308 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4550 : 97308 : recptr = XLogRecoveryCtl->lastReplayedEndRecPtr;
4551 : 97308 : tli = XLogRecoveryCtl->lastReplayedTLI;
4552 : 97308 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4553 : :
4554 [ + + ]: 97308 : if (replayTLI)
4555 : 2131 : *replayTLI = tli;
4556 : 97308 : return recptr;
4557 : : }
4558 : :
4559 : :
4560 : : /*
4561 : : * Get position of last applied, or the record being applied.
4562 : : *
4563 : : * This is different from GetXLogReplayRecPtr() in that if a WAL
4564 : : * record is currently being applied, this includes that record.
4565 : : */
4566 : : XLogRecPtr
4567 : 6487 : GetCurrentReplayRecPtr(TimeLineID *replayEndTLI)
4568 : : {
4569 : : XLogRecPtr recptr;
4570 : : TimeLineID tli;
4571 : :
4572 [ + + ]: 6487 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4573 : 6487 : recptr = XLogRecoveryCtl->replayEndRecPtr;
4574 : 6487 : tli = XLogRecoveryCtl->replayEndTLI;
4575 : 6487 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4576 : :
4577 [ + - ]: 6487 : if (replayEndTLI)
4578 : 6487 : *replayEndTLI = tli;
4579 : 6487 : return recptr;
4580 : : }
4581 : :
4582 : : /*
4583 : : * Save timestamp of latest processed commit/abort record.
4584 : : *
4585 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4586 : : * seen by processes other than the startup process. Note in particular
4587 : : * that CreateRestartPoint is executed in the checkpointer.
4588 : : */
4589 : : static void
4590 : 22583 : SetLatestXTime(TimestampTz xtime)
4591 : : {
4592 [ - + ]: 22583 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4593 : 22583 : XLogRecoveryCtl->recoveryLastXTime = xtime;
4594 : 22583 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4595 : 22583 : }
4596 : :
4597 : : /*
4598 : : * Fetch timestamp of latest processed commit/abort record.
4599 : : */
4600 : : TimestampTz
4601 : 359 : GetLatestXTime(void)
4602 : : {
4603 : : TimestampTz xtime;
4604 : :
4605 [ - + ]: 359 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4606 : 359 : xtime = XLogRecoveryCtl->recoveryLastXTime;
4607 : 359 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4608 : :
4609 : 359 : return xtime;
4610 : : }
4611 : :
4612 : : /*
4613 : : * Save timestamp of the next chunk of WAL records to apply.
4614 : : *
4615 : : * We keep this in XLogRecoveryCtl, not a simple static variable, so that it can be
4616 : : * seen by all backends.
4617 : : */
4618 : : static void
4619 : 8996 : SetCurrentChunkStartTime(TimestampTz xtime)
4620 : : {
4621 [ - + ]: 8996 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4622 : 8996 : XLogRecoveryCtl->currentChunkStartTime = xtime;
4623 : 8996 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4624 : 8996 : }
4625 : :
4626 : : /*
4627 : : * Fetch timestamp of latest processed commit/abort record.
4628 : : * Startup process maintains an accurate local copy in XLogReceiptTime
4629 : : */
4630 : : TimestampTz
4631 : 290 : GetCurrentChunkReplayStartTime(void)
4632 : : {
4633 : : TimestampTz xtime;
4634 : :
4635 [ + + ]: 290 : SpinLockAcquire(&XLogRecoveryCtl->info_lck);
4636 : 290 : xtime = XLogRecoveryCtl->currentChunkStartTime;
4637 : 290 : SpinLockRelease(&XLogRecoveryCtl->info_lck);
4638 : :
4639 : 290 : return xtime;
4640 : : }
4641 : :
4642 : : /*
4643 : : * Returns time of receipt of current chunk of XLOG data, as well as
4644 : : * whether it was received from streaming replication or from archives.
4645 : : */
4646 : : void
4647 : 28 : GetXLogReceiptTime(TimestampTz *rtime, bool *fromStream)
4648 : : {
4649 : : /*
4650 : : * This must be executed in the startup process, since we don't export the
4651 : : * relevant state to shared memory.
4652 : : */
4653 [ - + ]: 28 : Assert(InRecovery);
4654 : :
4655 : 28 : *rtime = XLogReceiptTime;
4656 : 28 : *fromStream = (XLogReceiptSource == XLOG_FROM_STREAM);
4657 : 28 : }
4658 : :
4659 : : /*
4660 : : * Note that text field supplied is a parameter name and does not require
4661 : : * translation
4662 : : */
4663 : : void
4664 : 680 : RecoveryRequiresIntParameter(const char *param_name, int currValue, int minValue)
4665 : : {
4666 [ - + ]: 680 : if (currValue < minValue)
4667 : : {
1488 heikki.linnakangas@i 4668 [ # # ]:UBC 0 : if (HotStandbyActiveInReplay())
4669 : : {
4670 : 0 : bool warned_for_promote = false;
4671 : :
4672 [ # # ]: 0 : ereport(WARNING,
4673 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4674 : : errmsg("hot standby is not possible because of insufficient parameter settings"),
4675 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4676 : : param_name,
4677 : : currValue,
4678 : : minValue)));
4679 : :
4680 : 0 : SetRecoveryPause(true);
4681 : :
4682 [ # # ]: 0 : ereport(LOG,
4683 : : (errmsg("recovery has paused"),
4684 : : errdetail("If recovery is unpaused, the server will shut down."),
4685 : : errhint("You can then restart the server after making the necessary configuration changes.")));
4686 : :
4687 [ # # ]: 0 : while (GetRecoveryPauseState() != RECOVERY_NOT_PAUSED)
4688 : : {
375 4689 : 0 : ProcessStartupProcInterrupts();
4690 : :
1488 4691 [ # # ]: 0 : if (CheckForStandbyTrigger())
4692 : : {
4693 [ # # ]: 0 : if (!warned_for_promote)
4694 [ # # ]: 0 : ereport(WARNING,
4695 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4696 : : errmsg("promotion is not possible because of insufficient parameter settings"),
4697 : :
4698 : : /*
4699 : : * Repeat the detail from above so it's easy to find
4700 : : * in the log.
4701 : : */
4702 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4703 : : param_name,
4704 : : currValue,
4705 : : minValue),
4706 : : errhint("Restart the server after making the necessary configuration changes.")));
4707 : 0 : warned_for_promote = true;
4708 : : }
4709 : :
4710 : : /*
4711 : : * If recovery pause is requested then set it paused. While
4712 : : * we are in the loop, user might resume and pause again so
4713 : : * set this every time.
4714 : : */
4715 : 0 : ConfirmRecoveryPaused();
4716 : :
4717 : : /*
4718 : : * We wait on a condition variable that will wake us as soon
4719 : : * as the pause ends, but we use a timeout so we can check the
4720 : : * above conditions periodically too.
4721 : : */
4722 : 0 : ConditionVariableTimedSleep(&XLogRecoveryCtl->recoveryNotPausedCV, 1000,
4723 : : WAIT_EVENT_RECOVERY_PAUSE);
4724 : : }
4725 : 0 : ConditionVariableCancelSleep();
4726 : : }
4727 : :
4728 [ # # ]: 0 : ereport(FATAL,
4729 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4730 : : errmsg("recovery aborted because of insufficient parameter settings"),
4731 : : /* Repeat the detail from above so it's easy to find in the log. */
4732 : : errdetail("%s = %d is a lower setting than on the primary server, where its value was %d.",
4733 : : param_name,
4734 : : currValue,
4735 : : minValue),
4736 : : errhint("You can restart the server after making the necessary configuration changes.")));
4737 : : }
1488 heikki.linnakangas@i 4738 :CBC 680 : }
4739 : :
4740 : :
4741 : : /*
4742 : : * GUC check_hook for primary_slot_name
4743 : : */
4744 : : bool
1279 tgl@sss.pgh.pa.us 4745 : 1386 : check_primary_slot_name(char **newval, void **extra, GucSource source)
4746 : : {
4747 : : int err_code;
144 fujii@postgresql.org 4748 : 1386 : char *err_msg = NULL;
4749 : 1386 : char *err_hint = NULL;
4750 : :
1279 tgl@sss.pgh.pa.us 4751 [ + - + + ]: 1386 : if (*newval && strcmp(*newval, "") != 0 &&
144 fujii@postgresql.org 4752 [ - + ]:GNC 200 : !ReplicationSlotValidateNameInternal(*newval, false, &err_code,
4753 : : &err_msg, &err_hint))
4754 : : {
144 fujii@postgresql.org 4755 :UBC 0 : GUC_check_errcode(err_code);
4756 : 0 : GUC_check_errdetail("%s", err_msg);
4757 [ # # ]: 0 : if (err_hint != NULL)
4758 : 0 : GUC_check_errhint("%s", err_hint);
1279 tgl@sss.pgh.pa.us 4759 : 0 : return false;
4760 : : }
4761 : :
1279 tgl@sss.pgh.pa.us 4762 :CBC 1386 : return true;
4763 : : }
4764 : :
4765 : : /*
4766 : : * Recovery target settings: Only one of the several recovery_target* settings
4767 : : * may be set. Setting a second one results in an error. The global variable
4768 : : * recoveryTarget tracks which kind of recovery target was chosen. Other
4769 : : * variables store the actual target value (for example a string or a xid).
4770 : : * The assign functions of the parameters check whether a competing parameter
4771 : : * was already set. But we want to allow setting the same parameter multiple
4772 : : * times. We also want to allow unsetting a parameter and setting a different
4773 : : * one, so we unset recoveryTarget when the parameter is set to an empty
4774 : : * string.
4775 : : *
4776 : : * XXX this code is broken by design. Throwing an error from a GUC assign
4777 : : * hook breaks fundamental assumptions of guc.c. So long as all the variables
4778 : : * for which this can happen are PGC_POSTMASTER, the consequences are limited,
4779 : : * since we'd just abort postmaster startup anyway. Nonetheless it's likely
4780 : : * that we have odd behaviors such as unexpected GUC ordering dependencies.
4781 : : */
4782 : :
4783 : : pg_noreturn static void
4784 : 1 : error_multiple_recovery_targets(void)
4785 : : {
4786 [ + - ]: 1 : ereport(ERROR,
4787 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4788 : : errmsg("multiple recovery targets specified"),
4789 : : errdetail("At most one of \"recovery_target\", \"recovery_target_lsn\", \"recovery_target_name\", \"recovery_target_time\", \"recovery_target_xid\" may be set.")));
4790 : : }
4791 : :
4792 : : /*
4793 : : * GUC check_hook for recovery_target
4794 : : */
4795 : : bool
4796 : 1186 : check_recovery_target(char **newval, void **extra, GucSource source)
4797 : : {
4798 [ + + - + ]: 1186 : if (strcmp(*newval, "immediate") != 0 && strcmp(*newval, "") != 0)
4799 : : {
1279 tgl@sss.pgh.pa.us 4800 :UBC 0 : GUC_check_errdetail("The only allowed value is \"immediate\".");
4801 : 0 : return false;
4802 : : }
1279 tgl@sss.pgh.pa.us 4803 :CBC 1186 : return true;
4804 : : }
4805 : :
4806 : : /*
4807 : : * GUC assign_hook for recovery_target
4808 : : */
4809 : : void
4810 : 1186 : assign_recovery_target(const char *newval, void *extra)
4811 : : {
4812 [ - + ]: 1186 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1279 tgl@sss.pgh.pa.us 4813 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_IMMEDIATE)
4814 : 0 : error_multiple_recovery_targets();
4815 : :
1279 tgl@sss.pgh.pa.us 4816 [ + - + + ]:CBC 1186 : if (newval && strcmp(newval, "") != 0)
4817 : 1 : recoveryTarget = RECOVERY_TARGET_IMMEDIATE;
4818 : : else
4819 : 1185 : recoveryTarget = RECOVERY_TARGET_UNSET;
4820 : 1186 : }
4821 : :
4822 : : /*
4823 : : * GUC check_hook for recovery_target_lsn
4824 : : */
4825 : : bool
4826 : 1192 : check_recovery_target_lsn(char **newval, void **extra, GucSource source)
4827 : : {
4828 [ + + ]: 1192 : if (strcmp(*newval, "") != 0)
4829 : : {
4830 : : XLogRecPtr lsn;
4831 : : XLogRecPtr *myextra;
191 michael@paquier.xyz 4832 :GNC 8 : ErrorSaveContext escontext = {T_ErrorSaveContext};
4833 : :
4834 : 8 : lsn = pg_lsn_in_safe(*newval, (Node *) &escontext);
4835 [ - + ]: 8 : if (escontext.error_occurred)
1279 tgl@sss.pgh.pa.us 4836 :UBC 0 : return false;
4837 : :
353 dgustafsson@postgres 4838 :CBC 8 : myextra = (XLogRecPtr *) guc_malloc(LOG, sizeof(XLogRecPtr));
4839 [ - + ]: 8 : if (!myextra)
353 dgustafsson@postgres 4840 :UBC 0 : return false;
1279 tgl@sss.pgh.pa.us 4841 :CBC 8 : *myextra = lsn;
472 peter@eisentraut.org 4842 : 8 : *extra = myextra;
4843 : : }
1279 tgl@sss.pgh.pa.us 4844 : 1192 : return true;
4845 : : }
4846 : :
4847 : : /*
4848 : : * GUC assign_hook for recovery_target_lsn
4849 : : */
4850 : : void
4851 : 1192 : assign_recovery_target_lsn(const char *newval, void *extra)
4852 : : {
4853 [ - + ]: 1192 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1279 tgl@sss.pgh.pa.us 4854 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_LSN)
4855 : 0 : error_multiple_recovery_targets();
4856 : :
1279 tgl@sss.pgh.pa.us 4857 [ + - + + ]:CBC 1192 : if (newval && strcmp(newval, "") != 0)
4858 : : {
4859 : 8 : recoveryTarget = RECOVERY_TARGET_LSN;
4860 : 8 : recoveryTargetLSN = *((XLogRecPtr *) extra);
4861 : : }
4862 : : else
4863 : 1184 : recoveryTarget = RECOVERY_TARGET_UNSET;
4864 : 1192 : }
4865 : :
4866 : : /*
4867 : : * GUC check_hook for recovery_target_name
4868 : : */
4869 : : bool
4870 : 1192 : check_recovery_target_name(char **newval, void **extra, GucSource source)
4871 : : {
4872 : : /* Use the value of newval directly */
4873 [ - + ]: 1192 : if (strlen(*newval) >= MAXFNAMELEN)
4874 : : {
667 peter@eisentraut.org 4875 :UBC 0 : GUC_check_errdetail("\"%s\" is too long (maximum %d characters).",
4876 : : "recovery_target_name", MAXFNAMELEN - 1);
1279 tgl@sss.pgh.pa.us 4877 : 0 : return false;
4878 : : }
1279 tgl@sss.pgh.pa.us 4879 :CBC 1192 : return true;
4880 : : }
4881 : :
4882 : : /*
4883 : : * GUC assign_hook for recovery_target_name
4884 : : */
4885 : : void
4886 : 1192 : assign_recovery_target_name(const char *newval, void *extra)
4887 : : {
4888 [ - + ]: 1192 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1279 tgl@sss.pgh.pa.us 4889 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_NAME)
4890 : 0 : error_multiple_recovery_targets();
4891 : :
1279 tgl@sss.pgh.pa.us 4892 [ + - + + ]:CBC 1192 : if (newval && strcmp(newval, "") != 0)
4893 : : {
4894 : 6 : recoveryTarget = RECOVERY_TARGET_NAME;
4895 : 6 : recoveryTargetName = newval;
4896 : : }
4897 : : else
4898 : 1186 : recoveryTarget = RECOVERY_TARGET_UNSET;
4899 : 1192 : }
4900 : :
4901 : : /*
4902 : : * GUC check_hook for recovery_target_time
4903 : : *
4904 : : * The interpretation of the recovery_target_time string can depend on the
4905 : : * time zone setting, so we need to wait until after all GUC processing is
4906 : : * done before we can do the final parsing of the string. This check function
4907 : : * only does a parsing pass to catch syntax errors, but we store the string
4908 : : * and parse it again when we need to use it.
4909 : : */
4910 : : bool
4911 : 1188 : check_recovery_target_time(char **newval, void **extra, GucSource source)
4912 : : {
4913 [ + + ]: 1188 : if (strcmp(*newval, "") != 0)
4914 : : {
4915 : : /* reject some special values */
4916 [ + - ]: 3 : if (strcmp(*newval, "now") == 0 ||
4917 [ + - ]: 3 : strcmp(*newval, "today") == 0 ||
4918 [ + - ]: 3 : strcmp(*newval, "tomorrow") == 0 ||
4919 [ - + ]: 3 : strcmp(*newval, "yesterday") == 0)
4920 : : {
1279 tgl@sss.pgh.pa.us 4921 :UBC 0 : return false;
4922 : : }
4923 : :
4924 : : /*
4925 : : * parse timestamp value (see also timestamptz_in())
4926 : : */
4927 : : {
1279 tgl@sss.pgh.pa.us 4928 :CBC 3 : char *str = *newval;
4929 : : fsec_t fsec;
4930 : : struct pg_tm tt,
4931 : 3 : *tm = &tt;
4932 : : int tz;
4933 : : int dtype;
4934 : : int nf;
4935 : : int dterr;
4936 : : char *field[MAXDATEFIELDS];
4937 : : int ftype[MAXDATEFIELDS];
4938 : : char workbuf[MAXDATELEN + MAXDATEFIELDS];
4939 : : DateTimeErrorExtra dtextra;
4940 : : TimestampTz timestamp;
4941 : :
4942 : 3 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
4943 : : field, ftype, MAXDATEFIELDS, &nf);
4944 [ + - ]: 3 : if (dterr == 0)
1192 4945 : 3 : dterr = DecodeDateTime(field, ftype, nf,
4946 : : &dtype, tm, &fsec, &tz, &dtextra);
1279 4947 [ - + ]: 3 : if (dterr != 0)
1279 tgl@sss.pgh.pa.us 4948 :UBC 0 : return false;
1279 tgl@sss.pgh.pa.us 4949 [ - + ]:CBC 3 : if (dtype != DTK_DATE)
1279 tgl@sss.pgh.pa.us 4950 :UBC 0 : return false;
4951 : :
1279 tgl@sss.pgh.pa.us 4952 [ - + ]:CBC 3 : if (tm2timestamp(tm, fsec, &tz, ×tamp) != 0)
4953 : : {
473 alvherre@alvh.no-ip. 4954 :UBC 0 : GUC_check_errdetail("Timestamp out of range: \"%s\".", str);
1279 tgl@sss.pgh.pa.us 4955 : 0 : return false;
4956 : : }
4957 : : }
4958 : : }
1279 tgl@sss.pgh.pa.us 4959 :CBC 1188 : return true;
4960 : : }
4961 : :
4962 : : /*
4963 : : * GUC assign_hook for recovery_target_time
4964 : : */
4965 : : void
4966 : 1188 : assign_recovery_target_time(const char *newval, void *extra)
4967 : : {
4968 [ + + ]: 1188 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
4969 [ + - ]: 1 : recoveryTarget != RECOVERY_TARGET_TIME)
4970 : 1 : error_multiple_recovery_targets();
4971 : :
4972 [ + - + + ]: 1187 : if (newval && strcmp(newval, "") != 0)
4973 : 2 : recoveryTarget = RECOVERY_TARGET_TIME;
4974 : : else
4975 : 1185 : recoveryTarget = RECOVERY_TARGET_UNSET;
4976 : 1187 : }
4977 : :
4978 : : /*
4979 : : * GUC check_hook for recovery_target_timeline
4980 : : */
4981 : : bool
4982 : 1189 : check_recovery_target_timeline(char **newval, void **extra, GucSource source)
4983 : : {
4984 : : RecoveryTargetTimeLineGoal rttg;
4985 : : RecoveryTargetTimeLineGoal *myextra;
4986 : :
4987 [ - + ]: 1189 : if (strcmp(*newval, "current") == 0)
1279 tgl@sss.pgh.pa.us 4988 :UBC 0 : rttg = RECOVERY_TARGET_TIMELINE_CONTROLFILE;
1279 tgl@sss.pgh.pa.us 4989 [ + + ]:CBC 1189 : else if (strcmp(*newval, "latest") == 0)
4990 : 1186 : rttg = RECOVERY_TARGET_TIMELINE_LATEST;
4991 : : else
4992 : : {
4993 : : char *endp;
4994 : : uint64 timeline;
4995 : :
1279 tgl@sss.pgh.pa.us 4996 :GBC 3 : rttg = RECOVERY_TARGET_TIMELINE_NUMERIC;
4997 : :
4998 : 3 : errno = 0;
255 michael@paquier.xyz 4999 :GNC 3 : timeline = strtou64(*newval, &endp, 0);
5000 : :
5001 [ + + + - : 3 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE)
- + ]
5002 : : {
5003 : 1 : GUC_check_errdetail("\"%s\" is not a valid number.",
5004 : : "recovery_target_timeline");
5005 : 3 : return false;
5006 : : }
5007 : :
5008 [ + + + - ]: 2 : if (timeline < 1 || timeline > PG_UINT32_MAX)
5009 : : {
5010 : 2 : GUC_check_errdetail("\"%s\" must be between %u and %u.",
5011 : : "recovery_target_timeline", 1, PG_UINT32_MAX);
1279 tgl@sss.pgh.pa.us 5012 :GBC 2 : return false;
5013 : : }
5014 : : }
5015 : :
353 dgustafsson@postgres 5016 :CBC 1186 : myextra = (RecoveryTargetTimeLineGoal *) guc_malloc(LOG, sizeof(RecoveryTargetTimeLineGoal));
5017 [ - + ]: 1186 : if (!myextra)
353 dgustafsson@postgres 5018 :UBC 0 : return false;
1279 tgl@sss.pgh.pa.us 5019 :CBC 1186 : *myextra = rttg;
472 peter@eisentraut.org 5020 : 1186 : *extra = myextra;
5021 : :
1279 tgl@sss.pgh.pa.us 5022 : 1186 : return true;
5023 : : }
5024 : :
5025 : : /*
5026 : : * GUC assign_hook for recovery_target_timeline
5027 : : */
5028 : : void
5029 : 1186 : assign_recovery_target_timeline(const char *newval, void *extra)
5030 : : {
5031 : 1186 : recoveryTargetTimeLineGoal = *((RecoveryTargetTimeLineGoal *) extra);
5032 [ - + ]: 1186 : if (recoveryTargetTimeLineGoal == RECOVERY_TARGET_TIMELINE_NUMERIC)
1279 tgl@sss.pgh.pa.us 5033 :UBC 0 : recoveryTargetTLIRequested = (TimeLineID) strtoul(newval, NULL, 0);
5034 : : else
1279 tgl@sss.pgh.pa.us 5035 :CBC 1186 : recoveryTargetTLIRequested = 0;
5036 : 1186 : }
5037 : :
5038 : : /*
5039 : : * GUC check_hook for recovery_target_xid
5040 : : */
5041 : : bool
5042 : 1187 : check_recovery_target_xid(char **newval, void **extra, GucSource source)
5043 : : {
5044 [ + + ]: 1187 : if (strcmp(*newval, "") != 0)
5045 : : {
5046 : : TransactionId xid;
5047 : : TransactionId *myextra;
5048 : : char *endp;
5049 : : char *val;
5050 : :
5051 : 2 : errno = 0;
5052 : :
5053 : : /*
5054 : : * Consume leading whitespace to determine if number is negative
5055 : : */
10 fujii@postgresql.org 5056 :GNC 2 : val = *newval;
5057 : :
5058 [ - + ]: 2 : while (isspace((unsigned char) *val))
10 fujii@postgresql.org 5059 :UNC 0 : val++;
5060 : :
5061 : : /*
5062 : : * This cast will remove the epoch, if any
5063 : : */
10 fujii@postgresql.org 5064 :GNC 2 : xid = (TransactionId) strtou64(val, &endp, 0);
5065 : :
5066 [ + + + - : 2 : if (*endp != '\0' || errno == EINVAL || errno == ERANGE || *val == '-')
+ - - + ]
5067 : : {
5068 : 1 : GUC_check_errdetail("\"%s\" is not a valid number.",
5069 : : "recovery_target_xid");
10 fujii@postgresql.org 5070 :GBC 1 : return false;
5071 : : }
5072 : :
10 fujii@postgresql.org 5073 [ - + ]:GNC 1 : if (xid < FirstNormalTransactionId)
5074 : : {
10 fujii@postgresql.org 5075 :UNC 0 : GUC_check_errdetail("\"%s\" without epoch must be greater than or equal to %u.",
5076 : : "recovery_target_xid",
5077 : : FirstNormalTransactionId);
1279 tgl@sss.pgh.pa.us 5078 : 0 : return false;
5079 : : }
5080 : :
353 dgustafsson@postgres 5081 :CBC 1 : myextra = (TransactionId *) guc_malloc(LOG, sizeof(TransactionId));
5082 [ - + ]: 1 : if (!myextra)
353 dgustafsson@postgres 5083 :UBC 0 : return false;
1279 tgl@sss.pgh.pa.us 5084 :CBC 1 : *myextra = xid;
472 peter@eisentraut.org 5085 : 1 : *extra = myextra;
5086 : : }
1279 tgl@sss.pgh.pa.us 5087 : 1186 : return true;
5088 : : }
5089 : :
5090 : : /*
5091 : : * GUC assign_hook for recovery_target_xid
5092 : : */
5093 : : void
5094 : 1186 : assign_recovery_target_xid(const char *newval, void *extra)
5095 : : {
5096 [ - + ]: 1186 : if (recoveryTarget != RECOVERY_TARGET_UNSET &&
1279 tgl@sss.pgh.pa.us 5097 [ # # ]:UBC 0 : recoveryTarget != RECOVERY_TARGET_XID)
5098 : 0 : error_multiple_recovery_targets();
5099 : :
1279 tgl@sss.pgh.pa.us 5100 [ + - + + ]:CBC 1186 : if (newval && strcmp(newval, "") != 0)
5101 : : {
5102 : 1 : recoveryTarget = RECOVERY_TARGET_XID;
5103 : 1 : recoveryTargetXid = *((TransactionId *) extra);
5104 : : }
5105 : : else
5106 : 1185 : recoveryTarget = RECOVERY_TARGET_UNSET;
5107 : 1186 : }
|
