Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * heapam_xlog.c
4 : * WAL replay logic for heap access method.
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/access/heap/heapam_xlog.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 : #include "postgres.h"
16 :
17 : #include "access/bufmask.h"
18 : #include "access/heapam.h"
19 : #include "access/visibilitymap.h"
20 : #include "access/xlog.h"
21 : #include "access/xlogutils.h"
22 : #include "storage/freespace.h"
23 : #include "storage/standby.h"
24 :
25 :
26 : /*
27 : * Replay XLOG_HEAP2_PRUNE_* records.
28 : */
29 : static void
30 20362 : heap_xlog_prune_freeze(XLogReaderState *record)
31 : {
32 20362 : XLogRecPtr lsn = record->EndRecPtr;
33 20362 : char *maindataptr = XLogRecGetData(record);
34 : xl_heap_prune xlrec;
35 : Buffer buffer;
36 : RelFileLocator rlocator;
37 : BlockNumber blkno;
38 : XLogRedoAction action;
39 :
40 20362 : XLogRecGetBlockTag(record, 0, &rlocator, NULL, &blkno);
41 20362 : memcpy(&xlrec, maindataptr, SizeOfHeapPrune);
42 20362 : maindataptr += SizeOfHeapPrune;
43 :
44 : /*
45 : * We will take an ordinary exclusive lock or a cleanup lock depending on
46 : * whether the XLHP_CLEANUP_LOCK flag is set. With an ordinary exclusive
47 : * lock, we better not be doing anything that requires moving existing
48 : * tuple data.
49 : */
50 : Assert((xlrec.flags & XLHP_CLEANUP_LOCK) != 0 ||
51 : (xlrec.flags & (XLHP_HAS_REDIRECTIONS | XLHP_HAS_DEAD_ITEMS)) == 0);
52 :
53 : /*
54 : * We are about to remove and/or freeze tuples. In Hot Standby mode,
55 : * ensure that there are no queries running for which the removed tuples
56 : * are still visible or which still consider the frozen xids as running.
57 : * The conflict horizon XID comes after xl_heap_prune.
58 : */
59 20362 : if ((xlrec.flags & XLHP_HAS_CONFLICT_HORIZON) != 0)
60 : {
61 : TransactionId snapshot_conflict_horizon;
62 :
63 : /* memcpy() because snapshot_conflict_horizon is stored unaligned */
64 16788 : memcpy(&snapshot_conflict_horizon, maindataptr, sizeof(TransactionId));
65 16788 : maindataptr += sizeof(TransactionId);
66 :
67 16788 : if (InHotStandby)
68 16330 : ResolveRecoveryConflictWithSnapshot(snapshot_conflict_horizon,
69 16330 : (xlrec.flags & XLHP_IS_CATALOG_REL) != 0,
70 : rlocator);
71 : }
72 :
73 : /*
74 : * If we have a full-page image, restore it and we're done.
75 : */
76 20362 : action = XLogReadBufferForRedoExtended(record, 0, RBM_NORMAL,
77 20362 : (xlrec.flags & XLHP_CLEANUP_LOCK) != 0,
78 : &buffer);
79 20362 : if (action == BLK_NEEDS_REDO)
80 : {
81 15984 : Page page = (Page) BufferGetPage(buffer);
82 : OffsetNumber *redirected;
83 : OffsetNumber *nowdead;
84 : OffsetNumber *nowunused;
85 : int nredirected;
86 : int ndead;
87 : int nunused;
88 : int nplans;
89 : Size datalen;
90 : xlhp_freeze_plan *plans;
91 : OffsetNumber *frz_offsets;
92 15984 : char *dataptr = XLogRecGetBlockData(record, 0, &datalen);
93 :
94 15984 : heap_xlog_deserialize_prune_and_freeze(dataptr, xlrec.flags,
95 : &nplans, &plans, &frz_offsets,
96 : &nredirected, &redirected,
97 : &ndead, &nowdead,
98 : &nunused, &nowunused);
99 :
100 : /*
101 : * Update all line pointers per the record, and repair fragmentation
102 : * if needed.
103 : */
104 15984 : if (nredirected > 0 || ndead > 0 || nunused > 0)
105 14396 : heap_page_prune_execute(buffer,
106 14396 : (xlrec.flags & XLHP_CLEANUP_LOCK) == 0,
107 : redirected, nredirected,
108 : nowdead, ndead,
109 : nowunused, nunused);
110 :
111 : /* Freeze tuples */
112 17770 : for (int p = 0; p < nplans; p++)
113 : {
114 : HeapTupleFreeze frz;
115 :
116 : /*
117 : * Convert freeze plan representation from WAL record into
118 : * per-tuple format used by heap_execute_freeze_tuple
119 : */
120 1786 : frz.xmax = plans[p].xmax;
121 1786 : frz.t_infomask2 = plans[p].t_infomask2;
122 1786 : frz.t_infomask = plans[p].t_infomask;
123 1786 : frz.frzflags = plans[p].frzflags;
124 1786 : frz.offset = InvalidOffsetNumber; /* unused, but be tidy */
125 :
126 115270 : for (int i = 0; i < plans[p].ntuples; i++)
127 : {
128 113484 : OffsetNumber offset = *(frz_offsets++);
129 : ItemId lp;
130 : HeapTupleHeader tuple;
131 :
132 113484 : lp = PageGetItemId(page, offset);
133 113484 : tuple = (HeapTupleHeader) PageGetItem(page, lp);
134 113484 : heap_execute_freeze_tuple(tuple, &frz);
135 : }
136 : }
137 :
138 : /* There should be no more data */
139 : Assert((char *) frz_offsets == dataptr + datalen);
140 :
141 : /*
142 : * Note: we don't worry about updating the page's prunability hints.
143 : * At worst this will cause an extra prune cycle to occur soon.
144 : */
145 :
146 15984 : PageSetLSN(page, lsn);
147 15984 : MarkBufferDirty(buffer);
148 : }
149 :
150 : /*
151 : * If we released any space or line pointers, update the free space map.
152 : *
153 : * Do this regardless of a full-page image being applied, since the FSM
154 : * data is not in the page anyway.
155 : */
156 20362 : if (BufferIsValid(buffer))
157 : {
158 20362 : if (xlrec.flags & (XLHP_HAS_REDIRECTIONS |
159 : XLHP_HAS_DEAD_ITEMS |
160 : XLHP_HAS_NOW_UNUSED_ITEMS))
161 : {
162 17194 : Size freespace = PageGetHeapFreeSpace(BufferGetPage(buffer));
163 :
164 17194 : UnlockReleaseBuffer(buffer);
165 :
166 17194 : XLogRecordPageWithFreeSpace(rlocator, blkno, freespace);
167 : }
168 : else
169 3168 : UnlockReleaseBuffer(buffer);
170 : }
171 20362 : }
172 :
173 : /*
174 : * Replay XLOG_HEAP2_VISIBLE records.
175 : *
176 : * The critical integrity requirement here is that we must never end up with
177 : * a situation where the visibility map bit is set, and the page-level
178 : * PD_ALL_VISIBLE bit is clear. If that were to occur, then a subsequent
179 : * page modification would fail to clear the visibility map bit.
180 : */
181 : static void
182 9838 : heap_xlog_visible(XLogReaderState *record)
183 : {
184 9838 : XLogRecPtr lsn = record->EndRecPtr;
185 9838 : xl_heap_visible *xlrec = (xl_heap_visible *) XLogRecGetData(record);
186 9838 : Buffer vmbuffer = InvalidBuffer;
187 : Buffer buffer;
188 : Page page;
189 : RelFileLocator rlocator;
190 : BlockNumber blkno;
191 : XLogRedoAction action;
192 :
193 : Assert((xlrec->flags & VISIBILITYMAP_XLOG_VALID_BITS) == xlrec->flags);
194 :
195 9838 : XLogRecGetBlockTag(record, 1, &rlocator, NULL, &blkno);
196 :
197 : /*
198 : * If there are any Hot Standby transactions running that have an xmin
199 : * horizon old enough that this page isn't all-visible for them, they
200 : * might incorrectly decide that an index-only scan can skip a heap fetch.
201 : *
202 : * NB: It might be better to throw some kind of "soft" conflict here that
203 : * forces any index-only scan that is in flight to perform heap fetches,
204 : * rather than killing the transaction outright.
205 : */
206 9838 : if (InHotStandby)
207 9490 : ResolveRecoveryConflictWithSnapshot(xlrec->snapshotConflictHorizon,
208 9490 : xlrec->flags & VISIBILITYMAP_XLOG_CATALOG_REL,
209 : rlocator);
210 :
211 : /*
212 : * Read the heap page, if it still exists. If the heap file has dropped or
213 : * truncated later in recovery, we don't need to update the page, but we'd
214 : * better still update the visibility map.
215 : */
216 9838 : action = XLogReadBufferForRedo(record, 1, &buffer);
217 9838 : if (action == BLK_NEEDS_REDO)
218 : {
219 : /*
220 : * We don't bump the LSN of the heap page when setting the visibility
221 : * map bit (unless checksums or wal_hint_bits is enabled, in which
222 : * case we must). This exposes us to torn page hazards, but since
223 : * we're not inspecting the existing page contents in any way, we
224 : * don't care.
225 : */
226 7756 : page = BufferGetPage(buffer);
227 :
228 7756 : PageSetAllVisible(page);
229 :
230 7756 : if (XLogHintBitIsNeeded())
231 7756 : PageSetLSN(page, lsn);
232 :
233 7756 : MarkBufferDirty(buffer);
234 : }
235 : else if (action == BLK_RESTORED)
236 : {
237 : /*
238 : * If heap block was backed up, we already restored it and there's
239 : * nothing more to do. (This can only happen with checksums or
240 : * wal_log_hints enabled.)
241 : */
242 : }
243 :
244 9838 : if (BufferIsValid(buffer))
245 : {
246 9838 : Size space = PageGetFreeSpace(BufferGetPage(buffer));
247 :
248 9838 : UnlockReleaseBuffer(buffer);
249 :
250 : /*
251 : * Since FSM is not WAL-logged and only updated heuristically, it
252 : * easily becomes stale in standbys. If the standby is later promoted
253 : * and runs VACUUM, it will skip updating individual free space
254 : * figures for pages that became all-visible (or all-frozen, depending
255 : * on the vacuum mode,) which is troublesome when FreeSpaceMapVacuum
256 : * propagates too optimistic free space values to upper FSM layers;
257 : * later inserters try to use such pages only to find out that they
258 : * are unusable. This can cause long stalls when there are many such
259 : * pages.
260 : *
261 : * Forestall those problems by updating FSM's idea about a page that
262 : * is becoming all-visible or all-frozen.
263 : *
264 : * Do this regardless of a full-page image being applied, since the
265 : * FSM data is not in the page anyway.
266 : */
267 9838 : if (xlrec->flags & VISIBILITYMAP_VALID_BITS)
268 9838 : XLogRecordPageWithFreeSpace(rlocator, blkno, space);
269 : }
270 :
271 : /*
272 : * Even if we skipped the heap page update due to the LSN interlock, it's
273 : * still safe to update the visibility map. Any WAL record that clears
274 : * the visibility map bit does so before checking the page LSN, so any
275 : * bits that need to be cleared will still be cleared.
276 : */
277 9838 : if (XLogReadBufferForRedoExtended(record, 0, RBM_ZERO_ON_ERROR, false,
278 : &vmbuffer) == BLK_NEEDS_REDO)
279 : {
280 9390 : Page vmpage = BufferGetPage(vmbuffer);
281 : Relation reln;
282 : uint8 vmbits;
283 :
284 : /* initialize the page if it was read as zeros */
285 9390 : if (PageIsNew(vmpage))
286 0 : PageInit(vmpage, BLCKSZ, 0);
287 :
288 : /* remove VISIBILITYMAP_XLOG_* */
289 9390 : vmbits = xlrec->flags & VISIBILITYMAP_VALID_BITS;
290 :
291 : /*
292 : * XLogReadBufferForRedoExtended locked the buffer. But
293 : * visibilitymap_set will handle locking itself.
294 : */
295 9390 : LockBuffer(vmbuffer, BUFFER_LOCK_UNLOCK);
296 :
297 9390 : reln = CreateFakeRelcacheEntry(rlocator);
298 9390 : visibilitymap_pin(reln, blkno, &vmbuffer);
299 :
300 9390 : visibilitymap_set(reln, blkno, InvalidBuffer, lsn, vmbuffer,
301 : xlrec->snapshotConflictHorizon, vmbits);
302 :
303 9390 : ReleaseBuffer(vmbuffer);
304 9390 : FreeFakeRelcacheEntry(reln);
305 : }
306 448 : else if (BufferIsValid(vmbuffer))
307 448 : UnlockReleaseBuffer(vmbuffer);
308 9838 : }
309 :
310 : /*
311 : * Given an "infobits" field from an XLog record, set the correct bits in the
312 : * given infomask and infomask2 for the tuple touched by the record.
313 : *
314 : * (This is the reverse of compute_infobits).
315 : */
316 : static void
317 883828 : fix_infomask_from_infobits(uint8 infobits, uint16 *infomask, uint16 *infomask2)
318 : {
319 883828 : *infomask &= ~(HEAP_XMAX_IS_MULTI | HEAP_XMAX_LOCK_ONLY |
320 : HEAP_XMAX_KEYSHR_LOCK | HEAP_XMAX_EXCL_LOCK);
321 883828 : *infomask2 &= ~HEAP_KEYS_UPDATED;
322 :
323 883828 : if (infobits & XLHL_XMAX_IS_MULTI)
324 4 : *infomask |= HEAP_XMAX_IS_MULTI;
325 883828 : if (infobits & XLHL_XMAX_LOCK_ONLY)
326 108972 : *infomask |= HEAP_XMAX_LOCK_ONLY;
327 883828 : if (infobits & XLHL_XMAX_EXCL_LOCK)
328 108182 : *infomask |= HEAP_XMAX_EXCL_LOCK;
329 : /* note HEAP_XMAX_SHR_LOCK isn't considered here */
330 883828 : if (infobits & XLHL_XMAX_KEYSHR_LOCK)
331 812 : *infomask |= HEAP_XMAX_KEYSHR_LOCK;
332 :
333 883828 : if (infobits & XLHL_KEYS_UPDATED)
334 593158 : *infomask2 |= HEAP_KEYS_UPDATED;
335 883828 : }
336 :
337 : /*
338 : * Replay XLOG_HEAP_DELETE records.
339 : */
340 : static void
341 594330 : heap_xlog_delete(XLogReaderState *record)
342 : {
343 594330 : XLogRecPtr lsn = record->EndRecPtr;
344 594330 : xl_heap_delete *xlrec = (xl_heap_delete *) XLogRecGetData(record);
345 : Buffer buffer;
346 : Page page;
347 594330 : ItemId lp = NULL;
348 : HeapTupleHeader htup;
349 : BlockNumber blkno;
350 : RelFileLocator target_locator;
351 : ItemPointerData target_tid;
352 :
353 594330 : XLogRecGetBlockTag(record, 0, &target_locator, NULL, &blkno);
354 594330 : ItemPointerSetBlockNumber(&target_tid, blkno);
355 594330 : ItemPointerSetOffsetNumber(&target_tid, xlrec->offnum);
356 :
357 : /*
358 : * The visibility map may need to be fixed even if the heap page is
359 : * already up-to-date.
360 : */
361 594330 : if (xlrec->flags & XLH_DELETE_ALL_VISIBLE_CLEARED)
362 : {
363 22 : Relation reln = CreateFakeRelcacheEntry(target_locator);
364 22 : Buffer vmbuffer = InvalidBuffer;
365 :
366 22 : visibilitymap_pin(reln, blkno, &vmbuffer);
367 22 : visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
368 22 : ReleaseBuffer(vmbuffer);
369 22 : FreeFakeRelcacheEntry(reln);
370 : }
371 :
372 594330 : if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
373 : {
374 590476 : page = BufferGetPage(buffer);
375 :
376 590476 : if (PageGetMaxOffsetNumber(page) >= xlrec->offnum)
377 590476 : lp = PageGetItemId(page, xlrec->offnum);
378 :
379 590476 : if (PageGetMaxOffsetNumber(page) < xlrec->offnum || !ItemIdIsNormal(lp))
380 0 : elog(PANIC, "invalid lp");
381 :
382 590476 : htup = (HeapTupleHeader) PageGetItem(page, lp);
383 :
384 590476 : htup->t_infomask &= ~(HEAP_XMAX_BITS | HEAP_MOVED);
385 590476 : htup->t_infomask2 &= ~HEAP_KEYS_UPDATED;
386 590476 : HeapTupleHeaderClearHotUpdated(htup);
387 590476 : fix_infomask_from_infobits(xlrec->infobits_set,
388 : &htup->t_infomask, &htup->t_infomask2);
389 590476 : if (!(xlrec->flags & XLH_DELETE_IS_SUPER))
390 590476 : HeapTupleHeaderSetXmax(htup, xlrec->xmax);
391 : else
392 0 : HeapTupleHeaderSetXmin(htup, InvalidTransactionId);
393 590476 : HeapTupleHeaderSetCmax(htup, FirstCommandId, false);
394 :
395 : /* Mark the page as a candidate for pruning */
396 590476 : PageSetPrunable(page, XLogRecGetXid(record));
397 :
398 590476 : if (xlrec->flags & XLH_DELETE_ALL_VISIBLE_CLEARED)
399 8 : PageClearAllVisible(page);
400 :
401 : /* Make sure t_ctid is set correctly */
402 590476 : if (xlrec->flags & XLH_DELETE_IS_PARTITION_MOVE)
403 286 : HeapTupleHeaderSetMovedPartitions(htup);
404 : else
405 590190 : htup->t_ctid = target_tid;
406 590476 : PageSetLSN(page, lsn);
407 590476 : MarkBufferDirty(buffer);
408 : }
409 594330 : if (BufferIsValid(buffer))
410 594330 : UnlockReleaseBuffer(buffer);
411 594330 : }
412 :
413 : /*
414 : * Replay XLOG_HEAP_INSERT records.
415 : */
416 : static void
417 2557124 : heap_xlog_insert(XLogReaderState *record)
418 : {
419 2557124 : XLogRecPtr lsn = record->EndRecPtr;
420 2557124 : xl_heap_insert *xlrec = (xl_heap_insert *) XLogRecGetData(record);
421 : Buffer buffer;
422 : Page page;
423 : union
424 : {
425 : HeapTupleHeaderData hdr;
426 : char data[MaxHeapTupleSize];
427 : } tbuf;
428 : HeapTupleHeader htup;
429 : xl_heap_header xlhdr;
430 : uint32 newlen;
431 2557124 : Size freespace = 0;
432 : RelFileLocator target_locator;
433 : BlockNumber blkno;
434 : ItemPointerData target_tid;
435 : XLogRedoAction action;
436 :
437 2557124 : XLogRecGetBlockTag(record, 0, &target_locator, NULL, &blkno);
438 2557124 : ItemPointerSetBlockNumber(&target_tid, blkno);
439 2557124 : ItemPointerSetOffsetNumber(&target_tid, xlrec->offnum);
440 :
441 : /*
442 : * The visibility map may need to be fixed even if the heap page is
443 : * already up-to-date.
444 : */
445 2557124 : if (xlrec->flags & XLH_INSERT_ALL_VISIBLE_CLEARED)
446 : {
447 1150 : Relation reln = CreateFakeRelcacheEntry(target_locator);
448 1150 : Buffer vmbuffer = InvalidBuffer;
449 :
450 1150 : visibilitymap_pin(reln, blkno, &vmbuffer);
451 1150 : visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
452 1150 : ReleaseBuffer(vmbuffer);
453 1150 : FreeFakeRelcacheEntry(reln);
454 : }
455 :
456 : /*
457 : * If we inserted the first and only tuple on the page, re-initialize the
458 : * page from scratch.
459 : */
460 2557124 : if (XLogRecGetInfo(record) & XLOG_HEAP_INIT_PAGE)
461 : {
462 34180 : buffer = XLogInitBufferForRedo(record, 0);
463 34180 : page = BufferGetPage(buffer);
464 34180 : PageInit(page, BufferGetPageSize(buffer), 0);
465 34180 : action = BLK_NEEDS_REDO;
466 : }
467 : else
468 2522944 : action = XLogReadBufferForRedo(record, 0, &buffer);
469 2557124 : if (action == BLK_NEEDS_REDO)
470 : {
471 : Size datalen;
472 : char *data;
473 :
474 2552520 : page = BufferGetPage(buffer);
475 :
476 2552520 : if (PageGetMaxOffsetNumber(page) + 1 < xlrec->offnum)
477 0 : elog(PANIC, "invalid max offset number");
478 :
479 2552520 : data = XLogRecGetBlockData(record, 0, &datalen);
480 :
481 2552520 : newlen = datalen - SizeOfHeapHeader;
482 : Assert(datalen > SizeOfHeapHeader && newlen <= MaxHeapTupleSize);
483 2552520 : memcpy(&xlhdr, data, SizeOfHeapHeader);
484 2552520 : data += SizeOfHeapHeader;
485 :
486 2552520 : htup = &tbuf.hdr;
487 2552520 : MemSet(htup, 0, SizeofHeapTupleHeader);
488 : /* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
489 2552520 : memcpy((char *) htup + SizeofHeapTupleHeader,
490 : data,
491 : newlen);
492 2552520 : newlen += SizeofHeapTupleHeader;
493 2552520 : htup->t_infomask2 = xlhdr.t_infomask2;
494 2552520 : htup->t_infomask = xlhdr.t_infomask;
495 2552520 : htup->t_hoff = xlhdr.t_hoff;
496 2552520 : HeapTupleHeaderSetXmin(htup, XLogRecGetXid(record));
497 2552520 : HeapTupleHeaderSetCmin(htup, FirstCommandId);
498 2552520 : htup->t_ctid = target_tid;
499 :
500 2552520 : if (PageAddItem(page, (Item) htup, newlen, xlrec->offnum,
501 : true, true) == InvalidOffsetNumber)
502 0 : elog(PANIC, "failed to add tuple");
503 :
504 2552520 : freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
505 :
506 2552520 : PageSetLSN(page, lsn);
507 :
508 2552520 : if (xlrec->flags & XLH_INSERT_ALL_VISIBLE_CLEARED)
509 348 : PageClearAllVisible(page);
510 :
511 : /* XLH_INSERT_ALL_FROZEN_SET implies that all tuples are visible */
512 2552520 : if (xlrec->flags & XLH_INSERT_ALL_FROZEN_SET)
513 0 : PageSetAllVisible(page);
514 :
515 2552520 : MarkBufferDirty(buffer);
516 : }
517 2557124 : if (BufferIsValid(buffer))
518 2557124 : UnlockReleaseBuffer(buffer);
519 :
520 : /*
521 : * If the page is running low on free space, update the FSM as well.
522 : * Arbitrarily, our definition of "low" is less than 20%. We can't do much
523 : * better than that without knowing the fill-factor for the table.
524 : *
525 : * XXX: Don't do this if the page was restored from full page image. We
526 : * don't bother to update the FSM in that case, it doesn't need to be
527 : * totally accurate anyway.
528 : */
529 2557124 : if (action == BLK_NEEDS_REDO && freespace < BLCKSZ / 5)
530 501594 : XLogRecordPageWithFreeSpace(target_locator, blkno, freespace);
531 2557124 : }
532 :
533 : /*
534 : * Replay XLOG_HEAP2_MULTI_INSERT records.
535 : */
536 : static void
537 112162 : heap_xlog_multi_insert(XLogReaderState *record)
538 : {
539 112162 : XLogRecPtr lsn = record->EndRecPtr;
540 : xl_heap_multi_insert *xlrec;
541 : RelFileLocator rlocator;
542 : BlockNumber blkno;
543 : Buffer buffer;
544 : Page page;
545 : union
546 : {
547 : HeapTupleHeaderData hdr;
548 : char data[MaxHeapTupleSize];
549 : } tbuf;
550 : HeapTupleHeader htup;
551 : uint32 newlen;
552 112162 : Size freespace = 0;
553 : int i;
554 112162 : bool isinit = (XLogRecGetInfo(record) & XLOG_HEAP_INIT_PAGE) != 0;
555 : XLogRedoAction action;
556 :
557 : /*
558 : * Insertion doesn't overwrite MVCC data, so no conflict processing is
559 : * required.
560 : */
561 112162 : xlrec = (xl_heap_multi_insert *) XLogRecGetData(record);
562 :
563 112162 : XLogRecGetBlockTag(record, 0, &rlocator, NULL, &blkno);
564 :
565 : /* check that the mutually exclusive flags are not both set */
566 : Assert(!((xlrec->flags & XLH_INSERT_ALL_VISIBLE_CLEARED) &&
567 : (xlrec->flags & XLH_INSERT_ALL_FROZEN_SET)));
568 :
569 : /*
570 : * The visibility map may need to be fixed even if the heap page is
571 : * already up-to-date.
572 : */
573 112162 : if (xlrec->flags & XLH_INSERT_ALL_VISIBLE_CLEARED)
574 : {
575 888 : Relation reln = CreateFakeRelcacheEntry(rlocator);
576 888 : Buffer vmbuffer = InvalidBuffer;
577 :
578 888 : visibilitymap_pin(reln, blkno, &vmbuffer);
579 888 : visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
580 888 : ReleaseBuffer(vmbuffer);
581 888 : FreeFakeRelcacheEntry(reln);
582 : }
583 :
584 112162 : if (isinit)
585 : {
586 4190 : buffer = XLogInitBufferForRedo(record, 0);
587 4190 : page = BufferGetPage(buffer);
588 4190 : PageInit(page, BufferGetPageSize(buffer), 0);
589 4190 : action = BLK_NEEDS_REDO;
590 : }
591 : else
592 107972 : action = XLogReadBufferForRedo(record, 0, &buffer);
593 112162 : if (action == BLK_NEEDS_REDO)
594 : {
595 : char *tupdata;
596 : char *endptr;
597 : Size len;
598 :
599 : /* Tuples are stored as block data */
600 110190 : tupdata = XLogRecGetBlockData(record, 0, &len);
601 110190 : endptr = tupdata + len;
602 :
603 110190 : page = (Page) BufferGetPage(buffer);
604 :
605 520590 : for (i = 0; i < xlrec->ntuples; i++)
606 : {
607 : OffsetNumber offnum;
608 : xl_multi_insert_tuple *xlhdr;
609 :
610 : /*
611 : * If we're reinitializing the page, the tuples are stored in
612 : * order from FirstOffsetNumber. Otherwise there's an array of
613 : * offsets in the WAL record, and the tuples come after that.
614 : */
615 410400 : if (isinit)
616 200002 : offnum = FirstOffsetNumber + i;
617 : else
618 210398 : offnum = xlrec->offsets[i];
619 410400 : if (PageGetMaxOffsetNumber(page) + 1 < offnum)
620 0 : elog(PANIC, "invalid max offset number");
621 :
622 410400 : xlhdr = (xl_multi_insert_tuple *) SHORTALIGN(tupdata);
623 410400 : tupdata = ((char *) xlhdr) + SizeOfMultiInsertTuple;
624 :
625 410400 : newlen = xlhdr->datalen;
626 : Assert(newlen <= MaxHeapTupleSize);
627 410400 : htup = &tbuf.hdr;
628 410400 : MemSet(htup, 0, SizeofHeapTupleHeader);
629 : /* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
630 410400 : memcpy((char *) htup + SizeofHeapTupleHeader,
631 : tupdata,
632 : newlen);
633 410400 : tupdata += newlen;
634 :
635 410400 : newlen += SizeofHeapTupleHeader;
636 410400 : htup->t_infomask2 = xlhdr->t_infomask2;
637 410400 : htup->t_infomask = xlhdr->t_infomask;
638 410400 : htup->t_hoff = xlhdr->t_hoff;
639 410400 : HeapTupleHeaderSetXmin(htup, XLogRecGetXid(record));
640 410400 : HeapTupleHeaderSetCmin(htup, FirstCommandId);
641 410400 : ItemPointerSetBlockNumber(&htup->t_ctid, blkno);
642 410400 : ItemPointerSetOffsetNumber(&htup->t_ctid, offnum);
643 :
644 410400 : offnum = PageAddItem(page, (Item) htup, newlen, offnum, true, true);
645 410400 : if (offnum == InvalidOffsetNumber)
646 0 : elog(PANIC, "failed to add tuple");
647 : }
648 110190 : if (tupdata != endptr)
649 0 : elog(PANIC, "total tuple length mismatch");
650 :
651 110190 : freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
652 :
653 110190 : PageSetLSN(page, lsn);
654 :
655 110190 : if (xlrec->flags & XLH_INSERT_ALL_VISIBLE_CLEARED)
656 88 : PageClearAllVisible(page);
657 :
658 : /* XLH_INSERT_ALL_FROZEN_SET implies that all tuples are visible */
659 110190 : if (xlrec->flags & XLH_INSERT_ALL_FROZEN_SET)
660 8 : PageSetAllVisible(page);
661 :
662 110190 : MarkBufferDirty(buffer);
663 : }
664 112162 : if (BufferIsValid(buffer))
665 112162 : UnlockReleaseBuffer(buffer);
666 :
667 : /*
668 : * If the page is running low on free space, update the FSM as well.
669 : * Arbitrarily, our definition of "low" is less than 20%. We can't do much
670 : * better than that without knowing the fill-factor for the table.
671 : *
672 : * XXX: Don't do this if the page was restored from full page image. We
673 : * don't bother to update the FSM in that case, it doesn't need to be
674 : * totally accurate anyway.
675 : */
676 112162 : if (action == BLK_NEEDS_REDO && freespace < BLCKSZ / 5)
677 28816 : XLogRecordPageWithFreeSpace(rlocator, blkno, freespace);
678 112162 : }
679 :
680 : /*
681 : * Replay XLOG_HEAP_UPDATE and XLOG_HEAP_HOT_UPDATE records.
682 : */
683 : static void
684 184940 : heap_xlog_update(XLogReaderState *record, bool hot_update)
685 : {
686 184940 : XLogRecPtr lsn = record->EndRecPtr;
687 184940 : xl_heap_update *xlrec = (xl_heap_update *) XLogRecGetData(record);
688 : RelFileLocator rlocator;
689 : BlockNumber oldblk;
690 : BlockNumber newblk;
691 : ItemPointerData newtid;
692 : Buffer obuffer,
693 : nbuffer;
694 : Page page;
695 : OffsetNumber offnum;
696 184940 : ItemId lp = NULL;
697 : HeapTupleData oldtup;
698 : HeapTupleHeader htup;
699 184940 : uint16 prefixlen = 0,
700 184940 : suffixlen = 0;
701 : char *newp;
702 : union
703 : {
704 : HeapTupleHeaderData hdr;
705 : char data[MaxHeapTupleSize];
706 : } tbuf;
707 : xl_heap_header xlhdr;
708 : uint32 newlen;
709 184940 : Size freespace = 0;
710 : XLogRedoAction oldaction;
711 : XLogRedoAction newaction;
712 :
713 : /* initialize to keep the compiler quiet */
714 184940 : oldtup.t_data = NULL;
715 184940 : oldtup.t_len = 0;
716 :
717 184940 : XLogRecGetBlockTag(record, 0, &rlocator, NULL, &newblk);
718 184940 : if (XLogRecGetBlockTagExtended(record, 1, NULL, NULL, &oldblk, NULL))
719 : {
720 : /* HOT updates are never done across pages */
721 : Assert(!hot_update);
722 : }
723 : else
724 77460 : oldblk = newblk;
725 :
726 184940 : ItemPointerSet(&newtid, newblk, xlrec->new_offnum);
727 :
728 : /*
729 : * The visibility map may need to be fixed even if the heap page is
730 : * already up-to-date.
731 : */
732 184940 : if (xlrec->flags & XLH_UPDATE_OLD_ALL_VISIBLE_CLEARED)
733 : {
734 316 : Relation reln = CreateFakeRelcacheEntry(rlocator);
735 316 : Buffer vmbuffer = InvalidBuffer;
736 :
737 316 : visibilitymap_pin(reln, oldblk, &vmbuffer);
738 316 : visibilitymap_clear(reln, oldblk, vmbuffer, VISIBILITYMAP_VALID_BITS);
739 316 : ReleaseBuffer(vmbuffer);
740 316 : FreeFakeRelcacheEntry(reln);
741 : }
742 :
743 : /*
744 : * In normal operation, it is important to lock the two pages in
745 : * page-number order, to avoid possible deadlocks against other update
746 : * operations going the other way. However, during WAL replay there can
747 : * be no other update happening, so we don't need to worry about that. But
748 : * we *do* need to worry that we don't expose an inconsistent state to Hot
749 : * Standby queries --- so the original page can't be unlocked before we've
750 : * added the new tuple to the new page.
751 : */
752 :
753 : /* Deal with old tuple version */
754 184940 : oldaction = XLogReadBufferForRedo(record, (oldblk == newblk) ? 0 : 1,
755 : &obuffer);
756 184940 : if (oldaction == BLK_NEEDS_REDO)
757 : {
758 184380 : page = BufferGetPage(obuffer);
759 184380 : offnum = xlrec->old_offnum;
760 184380 : if (PageGetMaxOffsetNumber(page) >= offnum)
761 184380 : lp = PageGetItemId(page, offnum);
762 :
763 184380 : if (PageGetMaxOffsetNumber(page) < offnum || !ItemIdIsNormal(lp))
764 0 : elog(PANIC, "invalid lp");
765 :
766 184380 : htup = (HeapTupleHeader) PageGetItem(page, lp);
767 :
768 184380 : oldtup.t_data = htup;
769 184380 : oldtup.t_len = ItemIdGetLength(lp);
770 :
771 184380 : htup->t_infomask &= ~(HEAP_XMAX_BITS | HEAP_MOVED);
772 184380 : htup->t_infomask2 &= ~HEAP_KEYS_UPDATED;
773 184380 : if (hot_update)
774 71278 : HeapTupleHeaderSetHotUpdated(htup);
775 : else
776 113102 : HeapTupleHeaderClearHotUpdated(htup);
777 184380 : fix_infomask_from_infobits(xlrec->old_infobits_set, &htup->t_infomask,
778 : &htup->t_infomask2);
779 184380 : HeapTupleHeaderSetXmax(htup, xlrec->old_xmax);
780 184380 : HeapTupleHeaderSetCmax(htup, FirstCommandId, false);
781 : /* Set forward chain link in t_ctid */
782 184380 : htup->t_ctid = newtid;
783 :
784 : /* Mark the page as a candidate for pruning */
785 184380 : PageSetPrunable(page, XLogRecGetXid(record));
786 :
787 184380 : if (xlrec->flags & XLH_UPDATE_OLD_ALL_VISIBLE_CLEARED)
788 312 : PageClearAllVisible(page);
789 :
790 184380 : PageSetLSN(page, lsn);
791 184380 : MarkBufferDirty(obuffer);
792 : }
793 :
794 : /*
795 : * Read the page the new tuple goes into, if different from old.
796 : */
797 184940 : if (oldblk == newblk)
798 : {
799 77460 : nbuffer = obuffer;
800 77460 : newaction = oldaction;
801 : }
802 107480 : else if (XLogRecGetInfo(record) & XLOG_HEAP_INIT_PAGE)
803 : {
804 1258 : nbuffer = XLogInitBufferForRedo(record, 0);
805 1258 : page = (Page) BufferGetPage(nbuffer);
806 1258 : PageInit(page, BufferGetPageSize(nbuffer), 0);
807 1258 : newaction = BLK_NEEDS_REDO;
808 : }
809 : else
810 106222 : newaction = XLogReadBufferForRedo(record, 0, &nbuffer);
811 :
812 : /*
813 : * The visibility map may need to be fixed even if the heap page is
814 : * already up-to-date.
815 : */
816 184940 : if (xlrec->flags & XLH_UPDATE_NEW_ALL_VISIBLE_CLEARED)
817 : {
818 98 : Relation reln = CreateFakeRelcacheEntry(rlocator);
819 98 : Buffer vmbuffer = InvalidBuffer;
820 :
821 98 : visibilitymap_pin(reln, newblk, &vmbuffer);
822 98 : visibilitymap_clear(reln, newblk, vmbuffer, VISIBILITYMAP_VALID_BITS);
823 98 : ReleaseBuffer(vmbuffer);
824 98 : FreeFakeRelcacheEntry(reln);
825 : }
826 :
827 : /* Deal with new tuple */
828 184940 : if (newaction == BLK_NEEDS_REDO)
829 : {
830 : char *recdata;
831 : char *recdata_end;
832 : Size datalen;
833 : Size tuplen;
834 :
835 184178 : recdata = XLogRecGetBlockData(record, 0, &datalen);
836 184178 : recdata_end = recdata + datalen;
837 :
838 184178 : page = BufferGetPage(nbuffer);
839 :
840 184178 : offnum = xlrec->new_offnum;
841 184178 : if (PageGetMaxOffsetNumber(page) + 1 < offnum)
842 0 : elog(PANIC, "invalid max offset number");
843 :
844 184178 : if (xlrec->flags & XLH_UPDATE_PREFIX_FROM_OLD)
845 : {
846 : Assert(newblk == oldblk);
847 29742 : memcpy(&prefixlen, recdata, sizeof(uint16));
848 29742 : recdata += sizeof(uint16);
849 : }
850 184178 : if (xlrec->flags & XLH_UPDATE_SUFFIX_FROM_OLD)
851 : {
852 : Assert(newblk == oldblk);
853 66776 : memcpy(&suffixlen, recdata, sizeof(uint16));
854 66776 : recdata += sizeof(uint16);
855 : }
856 :
857 184178 : memcpy(&xlhdr, recdata, SizeOfHeapHeader);
858 184178 : recdata += SizeOfHeapHeader;
859 :
860 184178 : tuplen = recdata_end - recdata;
861 : Assert(tuplen <= MaxHeapTupleSize);
862 :
863 184178 : htup = &tbuf.hdr;
864 184178 : MemSet(htup, 0, SizeofHeapTupleHeader);
865 :
866 : /*
867 : * Reconstruct the new tuple using the prefix and/or suffix from the
868 : * old tuple, and the data stored in the WAL record.
869 : */
870 184178 : newp = (char *) htup + SizeofHeapTupleHeader;
871 184178 : if (prefixlen > 0)
872 : {
873 : int len;
874 :
875 : /* copy bitmap [+ padding] [+ oid] from WAL record */
876 29742 : len = xlhdr.t_hoff - SizeofHeapTupleHeader;
877 29742 : memcpy(newp, recdata, len);
878 29742 : recdata += len;
879 29742 : newp += len;
880 :
881 : /* copy prefix from old tuple */
882 29742 : memcpy(newp, (char *) oldtup.t_data + oldtup.t_data->t_hoff, prefixlen);
883 29742 : newp += prefixlen;
884 :
885 : /* copy new tuple data from WAL record */
886 29742 : len = tuplen - (xlhdr.t_hoff - SizeofHeapTupleHeader);
887 29742 : memcpy(newp, recdata, len);
888 29742 : recdata += len;
889 29742 : newp += len;
890 : }
891 : else
892 : {
893 : /*
894 : * copy bitmap [+ padding] [+ oid] + data from record, all in one
895 : * go
896 : */
897 154436 : memcpy(newp, recdata, tuplen);
898 154436 : recdata += tuplen;
899 154436 : newp += tuplen;
900 : }
901 : Assert(recdata == recdata_end);
902 :
903 : /* copy suffix from old tuple */
904 184178 : if (suffixlen > 0)
905 66776 : memcpy(newp, (char *) oldtup.t_data + oldtup.t_len - suffixlen, suffixlen);
906 :
907 184178 : newlen = SizeofHeapTupleHeader + tuplen + prefixlen + suffixlen;
908 184178 : htup->t_infomask2 = xlhdr.t_infomask2;
909 184178 : htup->t_infomask = xlhdr.t_infomask;
910 184178 : htup->t_hoff = xlhdr.t_hoff;
911 :
912 184178 : HeapTupleHeaderSetXmin(htup, XLogRecGetXid(record));
913 184178 : HeapTupleHeaderSetCmin(htup, FirstCommandId);
914 184178 : HeapTupleHeaderSetXmax(htup, xlrec->new_xmax);
915 : /* Make sure there is no forward chain link in t_ctid */
916 184178 : htup->t_ctid = newtid;
917 :
918 184178 : offnum = PageAddItem(page, (Item) htup, newlen, offnum, true, true);
919 184178 : if (offnum == InvalidOffsetNumber)
920 0 : elog(PANIC, "failed to add tuple");
921 :
922 184178 : if (xlrec->flags & XLH_UPDATE_NEW_ALL_VISIBLE_CLEARED)
923 24 : PageClearAllVisible(page);
924 :
925 184178 : freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
926 :
927 184178 : PageSetLSN(page, lsn);
928 184178 : MarkBufferDirty(nbuffer);
929 : }
930 :
931 184940 : if (BufferIsValid(nbuffer) && nbuffer != obuffer)
932 107480 : UnlockReleaseBuffer(nbuffer);
933 184940 : if (BufferIsValid(obuffer))
934 184940 : UnlockReleaseBuffer(obuffer);
935 :
936 : /*
937 : * If the new page is running low on free space, update the FSM as well.
938 : * Arbitrarily, our definition of "low" is less than 20%. We can't do much
939 : * better than that without knowing the fill-factor for the table.
940 : *
941 : * However, don't update the FSM on HOT updates, because after crash
942 : * recovery, either the old or the new tuple will certainly be dead and
943 : * prunable. After pruning, the page will have roughly as much free space
944 : * as it did before the update, assuming the new tuple is about the same
945 : * size as the old one.
946 : *
947 : * XXX: Don't do this if the page was restored from full page image. We
948 : * don't bother to update the FSM in that case, it doesn't need to be
949 : * totally accurate anyway.
950 : */
951 184940 : if (newaction == BLK_NEEDS_REDO && !hot_update && freespace < BLCKSZ / 5)
952 22758 : XLogRecordPageWithFreeSpace(rlocator, newblk, freespace);
953 184940 : }
954 :
955 : /*
956 : * Replay XLOG_HEAP_CONFIRM records.
957 : */
958 : static void
959 154 : heap_xlog_confirm(XLogReaderState *record)
960 : {
961 154 : XLogRecPtr lsn = record->EndRecPtr;
962 154 : xl_heap_confirm *xlrec = (xl_heap_confirm *) XLogRecGetData(record);
963 : Buffer buffer;
964 : Page page;
965 : OffsetNumber offnum;
966 154 : ItemId lp = NULL;
967 : HeapTupleHeader htup;
968 :
969 154 : if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
970 : {
971 154 : page = BufferGetPage(buffer);
972 :
973 154 : offnum = xlrec->offnum;
974 154 : if (PageGetMaxOffsetNumber(page) >= offnum)
975 154 : lp = PageGetItemId(page, offnum);
976 :
977 154 : if (PageGetMaxOffsetNumber(page) < offnum || !ItemIdIsNormal(lp))
978 0 : elog(PANIC, "invalid lp");
979 :
980 154 : htup = (HeapTupleHeader) PageGetItem(page, lp);
981 :
982 : /*
983 : * Confirm tuple as actually inserted
984 : */
985 154 : ItemPointerSet(&htup->t_ctid, BufferGetBlockNumber(buffer), offnum);
986 :
987 154 : PageSetLSN(page, lsn);
988 154 : MarkBufferDirty(buffer);
989 : }
990 154 : if (BufferIsValid(buffer))
991 154 : UnlockReleaseBuffer(buffer);
992 154 : }
993 :
994 : /*
995 : * Replay XLOG_HEAP_LOCK records.
996 : */
997 : static void
998 109276 : heap_xlog_lock(XLogReaderState *record)
999 : {
1000 109276 : XLogRecPtr lsn = record->EndRecPtr;
1001 109276 : xl_heap_lock *xlrec = (xl_heap_lock *) XLogRecGetData(record);
1002 : Buffer buffer;
1003 : Page page;
1004 : OffsetNumber offnum;
1005 109276 : ItemId lp = NULL;
1006 : HeapTupleHeader htup;
1007 :
1008 : /*
1009 : * The visibility map may need to be fixed even if the heap page is
1010 : * already up-to-date.
1011 : */
1012 109276 : if (xlrec->flags & XLH_LOCK_ALL_FROZEN_CLEARED)
1013 : {
1014 : RelFileLocator rlocator;
1015 52 : Buffer vmbuffer = InvalidBuffer;
1016 : BlockNumber block;
1017 : Relation reln;
1018 :
1019 52 : XLogRecGetBlockTag(record, 0, &rlocator, NULL, &block);
1020 52 : reln = CreateFakeRelcacheEntry(rlocator);
1021 :
1022 52 : visibilitymap_pin(reln, block, &vmbuffer);
1023 52 : visibilitymap_clear(reln, block, vmbuffer, VISIBILITYMAP_ALL_FROZEN);
1024 :
1025 52 : ReleaseBuffer(vmbuffer);
1026 52 : FreeFakeRelcacheEntry(reln);
1027 : }
1028 :
1029 109276 : if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
1030 : {
1031 108972 : page = (Page) BufferGetPage(buffer);
1032 :
1033 108972 : offnum = xlrec->offnum;
1034 108972 : if (PageGetMaxOffsetNumber(page) >= offnum)
1035 108972 : lp = PageGetItemId(page, offnum);
1036 :
1037 108972 : if (PageGetMaxOffsetNumber(page) < offnum || !ItemIdIsNormal(lp))
1038 0 : elog(PANIC, "invalid lp");
1039 :
1040 108972 : htup = (HeapTupleHeader) PageGetItem(page, lp);
1041 :
1042 108972 : htup->t_infomask &= ~(HEAP_XMAX_BITS | HEAP_MOVED);
1043 108972 : htup->t_infomask2 &= ~HEAP_KEYS_UPDATED;
1044 108972 : fix_infomask_from_infobits(xlrec->infobits_set, &htup->t_infomask,
1045 : &htup->t_infomask2);
1046 :
1047 : /*
1048 : * Clear relevant update flags, but only if the modified infomask says
1049 : * there's no update.
1050 : */
1051 108972 : if (HEAP_XMAX_IS_LOCKED_ONLY(htup->t_infomask))
1052 : {
1053 108972 : HeapTupleHeaderClearHotUpdated(htup);
1054 : /* Make sure there is no forward chain link in t_ctid */
1055 108972 : ItemPointerSet(&htup->t_ctid,
1056 : BufferGetBlockNumber(buffer),
1057 : offnum);
1058 : }
1059 108972 : HeapTupleHeaderSetXmax(htup, xlrec->xmax);
1060 108972 : HeapTupleHeaderSetCmax(htup, FirstCommandId, false);
1061 108972 : PageSetLSN(page, lsn);
1062 108972 : MarkBufferDirty(buffer);
1063 : }
1064 109276 : if (BufferIsValid(buffer))
1065 109276 : UnlockReleaseBuffer(buffer);
1066 109276 : }
1067 :
1068 : /*
1069 : * Replay XLOG_HEAP2_LOCK_UPDATED records.
1070 : */
1071 : static void
1072 0 : heap_xlog_lock_updated(XLogReaderState *record)
1073 : {
1074 0 : XLogRecPtr lsn = record->EndRecPtr;
1075 : xl_heap_lock_updated *xlrec;
1076 : Buffer buffer;
1077 : Page page;
1078 : OffsetNumber offnum;
1079 0 : ItemId lp = NULL;
1080 : HeapTupleHeader htup;
1081 :
1082 0 : xlrec = (xl_heap_lock_updated *) XLogRecGetData(record);
1083 :
1084 : /*
1085 : * The visibility map may need to be fixed even if the heap page is
1086 : * already up-to-date.
1087 : */
1088 0 : if (xlrec->flags & XLH_LOCK_ALL_FROZEN_CLEARED)
1089 : {
1090 : RelFileLocator rlocator;
1091 0 : Buffer vmbuffer = InvalidBuffer;
1092 : BlockNumber block;
1093 : Relation reln;
1094 :
1095 0 : XLogRecGetBlockTag(record, 0, &rlocator, NULL, &block);
1096 0 : reln = CreateFakeRelcacheEntry(rlocator);
1097 :
1098 0 : visibilitymap_pin(reln, block, &vmbuffer);
1099 0 : visibilitymap_clear(reln, block, vmbuffer, VISIBILITYMAP_ALL_FROZEN);
1100 :
1101 0 : ReleaseBuffer(vmbuffer);
1102 0 : FreeFakeRelcacheEntry(reln);
1103 : }
1104 :
1105 0 : if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
1106 : {
1107 0 : page = BufferGetPage(buffer);
1108 :
1109 0 : offnum = xlrec->offnum;
1110 0 : if (PageGetMaxOffsetNumber(page) >= offnum)
1111 0 : lp = PageGetItemId(page, offnum);
1112 :
1113 0 : if (PageGetMaxOffsetNumber(page) < offnum || !ItemIdIsNormal(lp))
1114 0 : elog(PANIC, "invalid lp");
1115 :
1116 0 : htup = (HeapTupleHeader) PageGetItem(page, lp);
1117 :
1118 0 : htup->t_infomask &= ~(HEAP_XMAX_BITS | HEAP_MOVED);
1119 0 : htup->t_infomask2 &= ~HEAP_KEYS_UPDATED;
1120 0 : fix_infomask_from_infobits(xlrec->infobits_set, &htup->t_infomask,
1121 : &htup->t_infomask2);
1122 0 : HeapTupleHeaderSetXmax(htup, xlrec->xmax);
1123 :
1124 0 : PageSetLSN(page, lsn);
1125 0 : MarkBufferDirty(buffer);
1126 : }
1127 0 : if (BufferIsValid(buffer))
1128 0 : UnlockReleaseBuffer(buffer);
1129 0 : }
1130 :
1131 : /*
1132 : * Replay XLOG_HEAP_INPLACE records.
1133 : */
1134 : static void
1135 14540 : heap_xlog_inplace(XLogReaderState *record)
1136 : {
1137 14540 : XLogRecPtr lsn = record->EndRecPtr;
1138 14540 : xl_heap_inplace *xlrec = (xl_heap_inplace *) XLogRecGetData(record);
1139 : Buffer buffer;
1140 : Page page;
1141 : OffsetNumber offnum;
1142 14540 : ItemId lp = NULL;
1143 : HeapTupleHeader htup;
1144 : uint32 oldlen;
1145 : Size newlen;
1146 :
1147 14540 : if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
1148 : {
1149 14242 : char *newtup = XLogRecGetBlockData(record, 0, &newlen);
1150 :
1151 14242 : page = BufferGetPage(buffer);
1152 :
1153 14242 : offnum = xlrec->offnum;
1154 14242 : if (PageGetMaxOffsetNumber(page) >= offnum)
1155 14242 : lp = PageGetItemId(page, offnum);
1156 :
1157 14242 : if (PageGetMaxOffsetNumber(page) < offnum || !ItemIdIsNormal(lp))
1158 0 : elog(PANIC, "invalid lp");
1159 :
1160 14242 : htup = (HeapTupleHeader) PageGetItem(page, lp);
1161 :
1162 14242 : oldlen = ItemIdGetLength(lp) - htup->t_hoff;
1163 14242 : if (oldlen != newlen)
1164 0 : elog(PANIC, "wrong tuple length");
1165 :
1166 14242 : memcpy((char *) htup + htup->t_hoff, newtup, newlen);
1167 :
1168 14242 : PageSetLSN(page, lsn);
1169 14242 : MarkBufferDirty(buffer);
1170 : }
1171 14540 : if (BufferIsValid(buffer))
1172 14540 : UnlockReleaseBuffer(buffer);
1173 :
1174 14540 : ProcessCommittedInvalidationMessages(xlrec->msgs,
1175 : xlrec->nmsgs,
1176 14540 : xlrec->relcacheInitFileInval,
1177 : xlrec->dbId,
1178 : xlrec->tsId);
1179 14540 : }
1180 :
1181 : void
1182 3460368 : heap_redo(XLogReaderState *record)
1183 : {
1184 3460368 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
1185 :
1186 : /*
1187 : * These operations don't overwrite MVCC data so no conflict processing is
1188 : * required. The ones in heap2 rmgr do.
1189 : */
1190 :
1191 3460368 : switch (info & XLOG_HEAP_OPMASK)
1192 : {
1193 2557124 : case XLOG_HEAP_INSERT:
1194 2557124 : heap_xlog_insert(record);
1195 2557124 : break;
1196 594330 : case XLOG_HEAP_DELETE:
1197 594330 : heap_xlog_delete(record);
1198 594330 : break;
1199 113172 : case XLOG_HEAP_UPDATE:
1200 113172 : heap_xlog_update(record, false);
1201 113172 : break;
1202 4 : case XLOG_HEAP_TRUNCATE:
1203 :
1204 : /*
1205 : * TRUNCATE is a no-op because the actions are already logged as
1206 : * SMGR WAL records. TRUNCATE WAL record only exists for logical
1207 : * decoding.
1208 : */
1209 4 : break;
1210 71768 : case XLOG_HEAP_HOT_UPDATE:
1211 71768 : heap_xlog_update(record, true);
1212 71768 : break;
1213 154 : case XLOG_HEAP_CONFIRM:
1214 154 : heap_xlog_confirm(record);
1215 154 : break;
1216 109276 : case XLOG_HEAP_LOCK:
1217 109276 : heap_xlog_lock(record);
1218 109276 : break;
1219 14540 : case XLOG_HEAP_INPLACE:
1220 14540 : heap_xlog_inplace(record);
1221 14540 : break;
1222 0 : default:
1223 0 : elog(PANIC, "heap_redo: unknown op code %u", info);
1224 : }
1225 3460368 : }
1226 :
1227 : void
1228 144194 : heap2_redo(XLogReaderState *record)
1229 : {
1230 144194 : uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
1231 :
1232 144194 : switch (info & XLOG_HEAP_OPMASK)
1233 : {
1234 20362 : case XLOG_HEAP2_PRUNE_ON_ACCESS:
1235 : case XLOG_HEAP2_PRUNE_VACUUM_SCAN:
1236 : case XLOG_HEAP2_PRUNE_VACUUM_CLEANUP:
1237 20362 : heap_xlog_prune_freeze(record);
1238 20362 : break;
1239 9838 : case XLOG_HEAP2_VISIBLE:
1240 9838 : heap_xlog_visible(record);
1241 9838 : break;
1242 112162 : case XLOG_HEAP2_MULTI_INSERT:
1243 112162 : heap_xlog_multi_insert(record);
1244 112162 : break;
1245 0 : case XLOG_HEAP2_LOCK_UPDATED:
1246 0 : heap_xlog_lock_updated(record);
1247 0 : break;
1248 1832 : case XLOG_HEAP2_NEW_CID:
1249 :
1250 : /*
1251 : * Nothing to do on a real replay, only used during logical
1252 : * decoding.
1253 : */
1254 1832 : break;
1255 0 : case XLOG_HEAP2_REWRITE:
1256 0 : heap_xlog_logical_rewrite(record);
1257 0 : break;
1258 0 : default:
1259 0 : elog(PANIC, "heap2_redo: unknown op code %u", info);
1260 : }
1261 144194 : }
1262 :
1263 : /*
1264 : * Mask a heap page before performing consistency checks on it.
1265 : */
1266 : void
1267 5763332 : heap_mask(char *pagedata, BlockNumber blkno)
1268 : {
1269 5763332 : Page page = (Page) pagedata;
1270 : OffsetNumber off;
1271 :
1272 5763332 : mask_page_lsn_and_checksum(page);
1273 :
1274 5763332 : mask_page_hint_bits(page);
1275 5763332 : mask_unused_space(page);
1276 :
1277 471760564 : for (off = 1; off <= PageGetMaxOffsetNumber(page); off++)
1278 : {
1279 465997232 : ItemId iid = PageGetItemId(page, off);
1280 : char *page_item;
1281 :
1282 465997232 : page_item = (char *) (page + ItemIdGetOffset(iid));
1283 :
1284 465997232 : if (ItemIdIsNormal(iid))
1285 : {
1286 441672044 : HeapTupleHeader page_htup = (HeapTupleHeader) page_item;
1287 :
1288 : /*
1289 : * If xmin of a tuple is not yet frozen, we should ignore
1290 : * differences in hint bits, since they can be set without
1291 : * emitting WAL.
1292 : */
1293 441672044 : if (!HeapTupleHeaderXminFrozen(page_htup))
1294 439836864 : page_htup->t_infomask &= ~HEAP_XACT_MASK;
1295 : else
1296 : {
1297 : /* Still we need to mask xmax hint bits. */
1298 1835180 : page_htup->t_infomask &= ~HEAP_XMAX_INVALID;
1299 1835180 : page_htup->t_infomask &= ~HEAP_XMAX_COMMITTED;
1300 : }
1301 :
1302 : /*
1303 : * During replay, we set Command Id to FirstCommandId. Hence, mask
1304 : * it. See heap_xlog_insert() for details.
1305 : */
1306 441672044 : page_htup->t_choice.t_heap.t_field3.t_cid = MASK_MARKER;
1307 :
1308 : /*
1309 : * For a speculative tuple, heap_insert() does not set ctid in the
1310 : * caller-passed heap tuple itself, leaving the ctid field to
1311 : * contain a speculative token value - a per-backend monotonically
1312 : * increasing identifier. Besides, it does not WAL-log ctid under
1313 : * any circumstances.
1314 : *
1315 : * During redo, heap_xlog_insert() sets t_ctid to current block
1316 : * number and self offset number. It doesn't care about any
1317 : * speculative insertions on the primary. Hence, we set t_ctid to
1318 : * current block number and self offset number to ignore any
1319 : * inconsistency.
1320 : */
1321 441672044 : if (HeapTupleHeaderIsSpeculative(page_htup))
1322 156 : ItemPointerSet(&page_htup->t_ctid, blkno, off);
1323 :
1324 : /*
1325 : * NB: Not ignoring ctid changes due to the tuple having moved
1326 : * (i.e. HeapTupleHeaderIndicatesMovedPartitions), because that's
1327 : * important information that needs to be in-sync between primary
1328 : * and standby, and thus is WAL logged.
1329 : */
1330 : }
1331 :
1332 : /*
1333 : * Ignore any padding bytes after the tuple, when the length of the
1334 : * item is not MAXALIGNed.
1335 : */
1336 465997232 : if (ItemIdHasStorage(iid))
1337 : {
1338 441672044 : int len = ItemIdGetLength(iid);
1339 441672044 : int padlen = MAXALIGN(len) - len;
1340 :
1341 441672044 : if (padlen > 0)
1342 235774552 : memset(page_item + len, MASK_MARKER, padlen);
1343 : }
1344 : }
1345 5763332 : }
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