PostgreSQL Source Code: src/backend/access/transam/xlogreader.c Source File (original) (raw)
1
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5
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7
8
9
10
11
12
13
14
15
16
17
19
21#ifdef USE_LZ4
22#include <lz4.h>
23#endif
24#ifdef USE_ZSTD
25#include <zstd.h>
26#endif
27
35
36#ifndef FRONTEND
39#else
41#endif
42
47 int reqLen);
56 int segsize, const char *waldir);
57
58
59#define MAX_ERRORMSG_LEN 1000
60
61
62
63
64
65#define DEFAULT_DECODE_BUFFER_SIZE (64 * 1024)
66
67
68
69
70
71static void
73{
75
76 fmt = _(fmt);
77
78 va_start(args, fmt);
81
82 state->errormsg_deferred = true;
83}
84
85
86
87
88
89
90void
92{
94
95 state->decode_buffer = buffer;
96 state->decode_buffer_size = size;
97 state->decode_buffer_tail = buffer;
98 state->decode_buffer_head = buffer;
99}
100
101
102
103
104
105
109{
111
116 return NULL;
117
118
119 state->routine = *routine;
120
121
122
123
124
125
126
127
130 if (->readBuf)
131 {
133 return NULL;
134 }
135
136
138 waldir);
139
140
141 state->private_data = private_data;
142
145 if (->errormsg_buf)
146 {
149 return NULL;
150 }
151 state->errormsg_buf[0] = '\0';
152
153
154
155
156
159}
160
161void
163{
164 if (state->seg.ws_file != -1)
166
167 if (state->decode_buffer && state->free_decode_buffer)
169
171 if (state->readRecordBuf)
175}
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190static void
192{
193 uint32 newSize = reclength;
194
195 newSize += XLOG_BLCKSZ - (newSize % XLOG_BLCKSZ);
196 newSize = Max(newSize, 5 * Max(BLCKSZ, XLOG_BLCKSZ));
197
198 if (state->readRecordBuf)
200 state->readRecordBuf = (char *) palloc(newSize);
201 state->readRecordBufSize = newSize;
202}
203
204
205
206
207static void
209 int segsize, const char *waldir)
210{
214
216 if (waldir)
218}
219
220
221
222
223
224
225
226
227
228
229
230
231void
233{
235
237
238
239 state->EndRecPtr = RecPtr;
240 state->NextRecPtr = RecPtr;
243}
244
245
246
247
248
251{
254
255 if (->record)
257
258
259
260
261
262 record = state->record;
264 Assert(record == state->decode_queue_head);
265 state->record = NULL;
266 state->decode_queue_head = record->next;
267
268
269 if (state->decode_queue_tail == record)
270 state->decode_queue_tail = NULL;
271
272
274 {
275
277 }
278 else
279 {
280
281 Assert(state->decode_buffer_head == (char *) record);
282
283
284
285
286
287
288 record = record->next;
289 while (unlikely(record && record->oversized))
290 record = record->next;
291
292 if (record)
293 {
294
295 state->decode_buffer_head = (char *) record;
296 }
297 else
298 {
299
300
301
302
303
304
305 state->decode_buffer_head = state->decode_buffer;
306 state->decode_buffer_tail = state->decode_buffer;
307 }
308 }
309
310 return next_lsn;
311}
312
313
314
315
316
317
318
319
320
321
322
323
324
327{
328
330
331 if (state->decode_queue_head == NULL)
332 {
333 *errormsg = NULL;
334 if (state->errormsg_deferred)
335 {
336 if (state->errormsg_buf[0] != '\0')
337 *errormsg = state->errormsg_buf;
338 state->errormsg_deferred = false;
339 }
340
341
342
343
344
345
347
348 return NULL;
349 }
350
351
352
353
354
355
356
357 state->record = state->decode_queue_head;
358
359
360
361
362
363
364
365 state->ReadRecPtr = state->record->lsn;
366 state->EndRecPtr = state->record->next_lsn;
367
368 *errormsg = NULL;
369
370 return state->record;
371}
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
391{
393
394
395
396
397
399
400
401
402
403
406
407
409 if (decoded)
410 {
411
412
413
414
415
416
418 return &decoded->header;
419 }
420
421 return NULL;
422}
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
440{
443
444
446 {
447 if (state->decode_buffer_size == 0)
450 state->decode_buffer_head = state->decode_buffer;
451 state->decode_buffer_tail = state->decode_buffer;
452 state->free_decode_buffer = true;
453 }
454
455
456 if (state->decode_buffer_tail >= state->decode_buffer_head)
457 {
458
459 if (required_space <=
460 state->decode_buffer_size -
461 (state->decode_buffer_tail - state->decode_buffer))
462 {
463
464
465
466
467
468
469
470
471
472
475 return decoded;
476 }
477 else if (required_space <
478 state->decode_buffer_head - state->decode_buffer)
479 {
480
481
482
483
484
485
486
487
488
489
492 return decoded;
493 }
494 }
495 else
496 {
497
498 if (required_space <
499 state->decode_buffer_head - state->decode_buffer_tail)
500 {
501
502
503
504
505
506
507
508
509
510
513 return decoded;
514 }
515 }
516
517
518 if (allow_oversized)
519 {
520 decoded = palloc(required_space);
522 return decoded;
523 }
524
525 return NULL;
526}
527
530{
534 bool randAccess;
536 total_len;
538 uint32 pageHeaderSize;
539 bool assembled;
540 bool gotheader;
543 char *errormsg;
544
545
546
547
548
549
550 randAccess = false;
551
552
553 state->errormsg_buf[0] = '\0';
554 decoded = NULL;
555
558
559 RecPtr = state->NextRecPtr;
560
562 {
563
564
565
566
567
568
569
570
571 }
572 else
573 {
574
575
576
577
578
579
580
582 randAccess = true;
583 }
584
585restart:
586 state->nonblocking = nonblocking;
587 state->currRecPtr = RecPtr;
588 assembled = false;
589
590 targetPagePtr = RecPtr - (RecPtr % XLOG_BLCKSZ);
591 targetRecOff = RecPtr % XLOG_BLCKSZ;
592
593
594
595
596
597
603 goto err;
604
605
606
607
608
610 if (targetRecOff == 0)
611 {
612
613
614
615 RecPtr += pageHeaderSize;
616 targetRecOff = pageHeaderSize;
617 }
618 else if (targetRecOff < pageHeaderSize)
619 {
622 pageHeaderSize, targetRecOff);
623 goto err;
624 }
625
627 targetRecOff == pageHeaderSize)
628 {
631 goto err;
632 }
633
634
636
637
638
639
640
641
642
643
644
645
646 record = (XLogRecord *) (state->readBuf + RecPtr % XLOG_BLCKSZ);
648
649
650
651
652
653
654
655
656
658 {
660 randAccess))
661 goto err;
662 gotheader = true;
663 }
664 else
665 {
666
668 {
670 "invalid record length at %X/%X: expected at least %u, got %u",
673 goto err;
674 }
675
676 gotheader = false;
677 }
678
679
680
681
682
683
685 total_len,
686 false );
687 if (decoded == NULL && nonblocking)
688 {
689
690
691
692
693
695 }
696
697 len = XLOG_BLCKSZ - RecPtr % XLOG_BLCKSZ;
698 if (total_len > len)
699 {
700
701 char *contdata;
703 char *buffer;
705
706 assembled = true;
707
708
709
710
711
712 Assert(state->readRecordBufSize >= XLOG_BLCKSZ * 2);
714
715
716 memcpy(state->readRecordBuf,
717 state->readBuf + RecPtr % XLOG_BLCKSZ, len);
718 buffer = state->readRecordBuf + len;
719 gotlen = len;
720
721 do
722 {
723
724 targetPagePtr += XLOG_BLCKSZ;
725
726
729 XLOG_BLCKSZ));
730
734 goto err;
735
737
739
740
741
742
743
744
745
746
747
749 {
750 state->overwrittenRecPtr = RecPtr;
751 RecPtr = targetPagePtr;
752 goto restart;
753 }
754
755
757 {
759 "there is no contrecord flag at %X/%X",
761 goto err;
762 }
763
764
765
766
767
769 total_len != (pageHeader->xlp_rem_len + gotlen))
770 {
772 "invalid contrecord length %u (expected %lld) at %X/%X",
774 ((long long) total_len) - gotlen,
776 goto err;
777 }
778
779
781
782 if (readOff < pageHeaderSize)
784 pageHeaderSize);
785
787
788 contdata = (char *) state->readBuf + pageHeaderSize;
789 len = XLOG_BLCKSZ - pageHeaderSize;
792
795 pageHeaderSize + len);
796
797 memcpy(buffer, contdata, len);
798 buffer += len;
799 gotlen += len;
800
801
802 if (!gotheader)
803 {
806 record, randAccess))
807 goto err;
808 gotheader = true;
809 }
810
811
812
813
814
815
816
817 if (total_len > state->readRecordBufSize)
818 {
819 char save_copy[XLOG_BLCKSZ * 2];
820
821
822
823
824
826 Assert(gotlen <= state->readRecordBufSize);
827 memcpy(save_copy, state->readRecordBuf, gotlen);
829 memcpy(state->readRecordBuf, save_copy, gotlen);
830 buffer = state->readRecordBuf + gotlen;
831 }
832 } while (gotlen < total_len);
834
837 goto err;
838
840 state->DecodeRecPtr = RecPtr;
841 state->NextRecPtr = targetPagePtr + pageHeaderSize
843 }
844 else
845 {
846
848 Min(targetRecOff + total_len, XLOG_BLCKSZ));
852 goto err;
853
854
856 goto err;
857
858 state->NextRecPtr = RecPtr + MAXALIGN(total_len);
859
860 state->DecodeRecPtr = RecPtr;
861 }
862
863
864
865
866 if (record->xl_rmid == RM_XLOG_ID &&
868 {
869
870 state->NextRecPtr += state->segcxt.ws_segsize - 1;
872 }
873
874
875
876
877
878 if (decoded == NULL)
879 {
880 Assert(!nonblocking);
882 total_len,
883 true );
884
885 Assert(decoded != NULL);
886 }
887
889 {
890
892
893
894
895
896
898 {
899
901 if ((char *) decoded == state->decode_buffer)
902 state->decode_buffer_tail = state->decode_buffer + decoded->size;
903 else
904 state->decode_buffer_tail += decoded->size;
905 }
906
907
908 Assert(state->decode_queue_tail != decoded);
909 if (state->decode_queue_tail)
910 state->decode_queue_tail->next = decoded;
911 state->decode_queue_tail = decoded;
912 if (->decode_queue_head)
913 state->decode_queue_head = decoded;
915 }
916
918 if (assembled)
919 {
920
921
922
923
924
925
926
927
928
929 state->abortedRecPtr = RecPtr;
930 state->missingContrecPtr = targetPagePtr;
931
932
933
934
935
936
937 state->errormsg_deferred = true;
938 }
939
940 if (decoded && decoded->oversized)
942
943
944
945
946
948
949
950
951
952
953
954
956}
957
958
959
960
961
962
963
964
965
968{
970
971 if (state->errormsg_deferred)
972 return NULL;
973
976 {
977 Assert(state->decode_queue_tail != NULL);
978 return state->decode_queue_tail;
979 }
980
981 return NULL;
982}
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000static int
1002{
1004 uint32 targetPageOff;
1007
1008 Assert((pageptr % XLOG_BLCKSZ) == 0);
1009
1010 XLByteToSeg(pageptr, targetSegNo, state->segcxt.ws_segsize);
1012
1013
1014 if (targetSegNo == state->seg.ws_segno &&
1015 targetPageOff == state->segoff && reqLen <= state->readLen)
1016 return state->readLen;
1017
1018
1019
1020
1021
1022
1023 state->readLen = 0;
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037 if (targetSegNo != state->seg.ws_segno && targetPageOff != 0)
1038 {
1039 XLogRecPtr targetSegmentPtr = pageptr - targetPageOff;
1040
1041 readLen = state->routine.page_read(state, targetSegmentPtr, XLOG_BLCKSZ,
1042 state->currRecPtr,
1043 state->readBuf);
1047 goto err;
1048
1049
1051
1053 state->readBuf))
1054 goto err;
1055 }
1056
1057
1058
1059
1060
1062 state->currRecPtr,
1063 state->readBuf);
1067 goto err;
1068
1070
1071
1073 goto err;
1074
1076
1078
1079
1081 {
1083 state->currRecPtr,
1084 state->readBuf);
1088 goto err;
1089 }
1090
1091
1092
1093
1095 goto err;
1096
1097
1098 state->seg.ws_segno = targetSegNo;
1099 state->segoff = targetPageOff;
1101
1103
1106
1108}
1109
1110
1111
1112
1113static void
1115{
1116 state->seg.ws_segno = 0;
1117 state->segoff = 0;
1118 state->readLen = 0;
1119}
1120
1121
1122
1123
1124
1125
1126
1127static bool
1130 bool randAccess)
1131{
1133 {
1135 "invalid record length at %X/%X: expected at least %u, got %u",
1138 return false;
1139 }
1141 {
1143 "invalid resource manager ID %u at %X/%X",
1145 return false;
1146 }
1147 if (randAccess)
1148 {
1149
1150
1151
1152
1153 if (!(record->xl_prev < RecPtr))
1154 {
1156 "record with incorrect prev-link %X/%X at %X/%X",
1159 return false;
1160 }
1161 }
1162 else
1163 {
1164
1165
1166
1167
1168
1169 if (record->xl_prev != PrevRecPtr)
1170 {
1172 "record with incorrect prev-link %X/%X at %X/%X",
1175 return false;
1176 }
1177 }
1178
1179 return true;
1180}
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193static bool
1195{
1197
1199
1200
1203
1206
1208 {
1210 "incorrect resource manager data checksum in record at %X/%X",
1212 return false;
1213 }
1214
1215 return true;
1216}
1217
1218
1219
1220
1221
1222
1223
1224bool
1226 char *phdr)
1227{
1231
1232 Assert((recptr % XLOG_BLCKSZ) == 0);
1233
1236
1238 {
1240
1242
1244 "invalid magic number %04X in WAL segment %s, LSN %X/%X, offset %u",
1246 fname,
1248 offset);
1249 return false;
1250 }
1251
1253 {
1255
1257
1259 "invalid info bits %04X in WAL segment %s, LSN %X/%X, offset %u",
1261 fname,
1263 offset);
1264 return false;
1265 }
1266
1268 {
1270
1271 if (state->system_identifier &&
1273 {
1275 "WAL file is from different database system: WAL file database system identifier is %" PRIu64 ", pg_control database system identifier is %" PRIu64,
1277 state->system_identifier);
1278 return false;
1279 }
1281 {
1283 "WAL file is from different database system: incorrect segment size in page header");
1284 return false;
1285 }
1287 {
1289 "WAL file is from different database system: incorrect XLOG_BLCKSZ in page header");
1290 return false;
1291 }
1292 }
1293 else if (offset == 0)
1294 {
1296
1298
1299
1301 "invalid info bits %04X in WAL segment %s, LSN %X/%X, offset %u",
1303 fname,
1305 offset);
1306 return false;
1307 }
1308
1309
1310
1311
1312
1313
1315 {
1317
1319
1321 "unexpected pageaddr %X/%X in WAL segment %s, LSN %X/%X, offset %u",
1323 fname,
1325 offset);
1326 return false;
1327 }
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338 if (recptr > state->latestPagePtr)
1339 {
1341 {
1343
1345
1347 "out-of-sequence timeline ID %u (after %u) in WAL segment %s, LSN %X/%X, offset %u",
1349 state->latestPageTLI,
1350 fname,
1352 offset);
1353 return false;
1354 }
1355 }
1356 state->latestPagePtr = recptr;
1358
1359 return true;
1360}
1361
1362
1363
1364
1365void
1367{
1368 state->errormsg_buf[0] = '\0';
1369 state->errormsg_deferred = false;
1370}
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1385{
1389 char *errormsg;
1390
1392
1393
1394 state->nonblocking = false;
1395
1396
1397
1398
1399
1400 tmpRecPtr = RecPtr;
1401 while (true)
1402 {
1404 int targetRecOff;
1405 uint32 pageHeaderSize;
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417 targetRecOff = tmpRecPtr % XLOG_BLCKSZ;
1418
1419
1420 targetPagePtr = tmpRecPtr - targetRecOff;
1421
1422
1425 goto err;
1426
1428
1430
1431
1434 goto err;
1435
1436
1438 {
1439
1440
1441
1442
1443
1444
1445
1446
1447
1449 tmpRecPtr = targetPagePtr + XLOG_BLCKSZ;
1450 else
1451 {
1452
1453
1454
1455
1456 tmpRecPtr = targetPagePtr + pageHeaderSize
1458 break;
1459 }
1460 }
1461 else
1462 {
1463 tmpRecPtr = targetPagePtr + pageHeaderSize;
1464 break;
1465 }
1466 }
1467
1468
1469
1470
1471
1472
1475 {
1476
1477 if (RecPtr <= state->ReadRecPtr)
1478 {
1479
1480 found = state->ReadRecPtr;
1482 return found;
1483 }
1484 }
1485
1488
1490}
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503bool
1507{
1508 char *p;
1510 Size nbytes;
1511#ifndef FRONTEND
1513#endif
1514
1515 p = buf;
1516 recptr = startptr;
1517 nbytes = count;
1518
1519 while (nbytes > 0)
1520 {
1522 int segbytes;
1523 int readbytes;
1524
1526
1527
1528
1529
1530
1531
1532 if (state->seg.ws_file < 0 ||
1534 tli != state->seg.ws_tli)
1535 {
1537
1538 if (state->seg.ws_file >= 0)
1539 state->routine.segment_close(state);
1540
1542 state->routine.segment_open(state, nextSegNo, &tli);
1543
1544
1546
1547
1548 state->seg.ws_tli = tli;
1549 state->seg.ws_segno = nextSegNo;
1550 }
1551
1552
1553 if (nbytes > (state->segcxt.ws_segsize - startoff))
1554 segbytes = state->segcxt.ws_segsize - startoff;
1555 else
1556 segbytes = nbytes;
1557
1558#ifndef FRONTEND
1559
1561
1563#endif
1564
1565
1566 errno = 0;
1567 readbytes = pg_pread(state->seg.ws_file, p, segbytes, (off_t) startoff);
1568
1569#ifndef FRONTEND
1571
1573 io_start, 1, readbytes);
1574#endif
1575
1576 if (readbytes <= 0)
1577 {
1579 errinfo->wre_req = segbytes;
1580 errinfo->wre_read = readbytes;
1581 errinfo->wre_off = startoff;
1583 return false;
1584 }
1585
1586
1587 recptr += readbytes;
1588 nbytes -= readbytes;
1589 p += readbytes;
1590 }
1591
1592 return true;
1593}
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604static void
1606{
1608
1609
1610 while ((r = state->decode_queue_head) != NULL)
1611 {
1612 state->decode_queue_head = r->next;
1615 }
1616 state->decode_queue_tail = NULL;
1617 state->decode_queue_head = NULL;
1618 state->record = NULL;
1619
1620
1621 state->decode_buffer_tail = state->decode_buffer;
1622 state->decode_buffer_head = state->decode_buffer;
1623
1624
1625 state->errormsg_buf[0] = '\0';
1626 state->errormsg_deferred = false;
1627}
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638size_t
1640{
1641 size_t size = 0;
1642
1643
1645
1647
1648 size += xl_tot_len;
1649
1650 size += (MAXIMUM_ALIGNOF - 1);
1651
1653
1654 size += (MAXIMUM_ALIGNOF - 1);
1655
1656 return size;
1657}
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671bool
1676 char **errormsg)
1677{
1678
1679
1680
1681#define COPY_HEADER_FIELD(_dst, _size) \
1682 do { \
1683 if (remaining < _size) \
1684 goto shortdata_err; \
1685 memcpy(_dst, ptr, _size); \
1686 ptr += _size; \
1687 remaining -= _size; \
1688 } while(0)
1689
1690 char *ptr;
1691 char *out;
1696
1697 decoded->header = *record;
1698 decoded->lsn = lsn;
1699 decoded->next = NULL;
1705 ptr = (char *) record;
1708
1709
1710 datatotal = 0;
1712 {
1714
1716 {
1717
1718 uint8 main_data_len;
1719
1721
1723 datatotal += main_data_len;
1724 break;
1725
1726 }
1728 {
1729
1730 uint32 main_data_len;
1731
1734 datatotal += main_data_len;
1735 break;
1736
1737 }
1739 {
1741 }
1743 {
1745 }
1747 {
1748
1750 uint8 fork_flags;
1751
1752
1753 for (int i = decoded->max_block_id + 1; i < block_id; ++i)
1755
1756 if (block_id <= decoded->max_block_id)
1757 {
1759 "out-of-order block_id %u at %X/%X",
1760 block_id,
1762 goto err;
1763 }
1765
1766 blk = &decoded->blocks[block_id];
1769
1772 blk->flags = fork_flags;
1775
1777
1779
1781 {
1783 "BKPBLOCK_HAS_DATA set, but no data included at %X/%X",
1785 goto err;
1786 }
1788 {
1790 "BKPBLOCK_HAS_DATA not set, but data length is %u at %X/%X",
1791 (unsigned int) blk->data_len,
1793 goto err;
1794 }
1796
1798 {
1802
1804
1806 {
1809 else
1811 }
1812 else
1815
1816
1817
1818
1819
1824 {
1826 "BKPIMAGE_HAS_HOLE set, but hole offset %u length %u block image length %u at %X/%X",
1829 (unsigned int) blk->bimg_len,
1831 goto err;
1832 }
1833
1834
1835
1836
1837
1840 {
1842 "BKPIMAGE_HAS_HOLE not set, but hole offset %u length %u at %X/%X",
1846 goto err;
1847 }
1848
1849
1850
1851
1854 {
1856 "BKPIMAGE_COMPRESSED set, but block image length %u at %X/%X",
1857 (unsigned int) blk->bimg_len,
1859 goto err;
1860 }
1861
1862
1863
1864
1865
1869 {
1871 "neither BKPIMAGE_HAS_HOLE nor BKPIMAGE_COMPRESSED set, but block image length is %u at %X/%X",
1872 (unsigned int) blk->data_len,
1874 goto err;
1875 }
1876 }
1878 {
1881 }
1882 else
1883 {
1884 if (rlocator == NULL)
1885 {
1887 "BKPBLOCK_SAME_REL set but no previous rel at %X/%X",
1889 goto err;
1890 }
1891
1893 }
1895 }
1896 else
1897 {
1899 "invalid block_id %u at %X/%X",
1901 goto err;
1902 }
1903 }
1904
1906 goto shortdata_err;
1907
1908
1909
1910
1911
1912
1913
1914
1915 out = ((char *) decoded) +
1918
1919
1920 for (block_id = 0; block_id <= decoded->max_block_id; block_id++)
1921 {
1923
1925 continue;
1926
1928
1930 {
1931
1933 memcpy(out, ptr, blk->bimg_len);
1936 }
1938 {
1939 out = (char *) MAXALIGN(out);
1940 blk->data = out;
1944 }
1945 }
1946
1947
1949 {
1950 out = (char *) MAXALIGN(out);
1955 }
1956
1957
1958 decoded->size = MAXALIGN(out - (char *) decoded);
1960 decoded->size);
1961
1962 return true;
1963
1964shortdata_err:
1966 "record with invalid length at %X/%X",
1969 *errormsg = state->errormsg_buf;
1970
1971 return false;
1972}
1973
1974
1975
1976
1977
1978
1979
1980void
1984{
1986 blknum, NULL))
1987 {
1988#ifndef FRONTEND
1989 elog(ERROR, "could not locate backup block with ID %d in WAL record",
1990 block_id);
1991#else
1992 pg_fatal("could not locate backup block with ID %d in WAL record",
1993 block_id);
1994#endif
1995 }
1996}
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006bool
2010 Buffer *prefetch_buffer)
2011{
2013
2015 return false;
2016
2018 if (rlocator)
2020 if (forknum)
2021 *forknum = bkpb->forknum;
2022 if (blknum)
2023 *blknum = bkpb->blkno;
2024 if (prefetch_buffer)
2026 return true;
2027}
2028
2029
2030
2031
2032
2033
2034char *
2036{
2038
2041 return NULL;
2042
2044
2046 {
2047 if (len)
2048 *len = 0;
2049 return NULL;
2050 }
2051 else
2052 {
2053 if (len)
2055 return bkpb->data;
2056 }
2057}
2058
2059
2060
2061
2062
2063
2064
2065bool
2067{
2069 char *ptr;
2071
2074 {
2076 "could not restore image at %X/%X with invalid block %d specified",
2078 block_id);
2079 return false;
2080 }
2082 {
2083 report_invalid_record(record, "could not restore image at %X/%X with invalid state, block %d",
2085 block_id);
2086 return false;
2087 }
2088
2091
2093 {
2094
2095 bool decomp_success = true;
2096
2098 {
2101 decomp_success = false;
2102 }
2104 {
2105#ifdef USE_LZ4
2106 if (LZ4_decompress_safe(ptr, tmp.data,
2108 decomp_success = false;
2109#else
2110 report_invalid_record(record, "could not restore image at %X/%X compressed with %s not supported by build, block %d",
2112 "LZ4",
2113 block_id);
2114 return false;
2115#endif
2116 }
2118 {
2119#ifdef USE_ZSTD
2120 size_t decomp_result = ZSTD_decompress(tmp.data,
2123
2124 if (ZSTD_isError(decomp_result))
2125 decomp_success = false;
2126#else
2127 report_invalid_record(record, "could not restore image at %X/%X compressed with %s not supported by build, block %d",
2129 "zstd",
2130 block_id);
2131 return false;
2132#endif
2133 }
2134 else
2135 {
2136 report_invalid_record(record, "could not restore image at %X/%X compressed with unknown method, block %d",
2138 block_id);
2139 return false;
2140 }
2141
2142 if (!decomp_success)
2143 {
2146 block_id);
2147 return false;
2148 }
2149
2150 ptr = tmp.data;
2151 }
2152
2153
2155 {
2156 memcpy(page, ptr, BLCKSZ);
2157 }
2158 else
2159 {
2161
2166 }
2167
2168 return true;
2169}
2170
2171#ifndef FRONTEND
2172
2173
2174
2175
2178{
2179
2180
2181
2182
2184
2187}
2188
2189#endif
#define pg_attribute_printf(f, a)
#define MemSet(start, val, len)
void err(int eval, const char *fmt,...)
#define MCXT_ALLOC_NO_OOM
Assert(PointerIsAligned(start, uint64))
if(TABLE==NULL||TABLE_index==NULL)
void pfree(void *pointer)
void * palloc_extended(Size size, int flags)
#define AmStartupProcess()
#define InvalidRepOriginId
#define COMP_CRC32C(crc, data, len)
#define EQ_CRC32C(c1, c2)
int32 pglz_decompress(const char *source, int32 slen, char *dest, int32 rawsize, bool check_complete)
instr_time pgstat_prepare_io_time(bool track_io_guc)
void pgstat_count_io_op_time(IOObject io_object, IOContext io_context, IOOp io_op, instr_time start_time, uint32 cnt, uint64 bytes)
#define RmgrIdIsValid(rmid)
struct DecodedXLogRecord * next
TransactionId toplevel_xid
RepOriginId record_origin
DecodedBkpBlock blocks[FLEXIBLE_ARRAY_MEMBER]
FullTransactionId nextXid
DecodedXLogRecord * record
#define InvalidTransactionId
static FullTransactionId FullTransactionIdFromAllowableAt(FullTransactionId nextFullXid, TransactionId xid)
TransamVariablesData * TransamVariables
static void pgstat_report_wait_start(uint32 wait_event_info)
static void pgstat_report_wait_end(void)
#define XLP_FIRST_IS_CONTRECORD
XLogLongPageHeaderData * XLogLongPageHeader
#define XLP_FIRST_IS_OVERWRITE_CONTRECORD
#define XLogSegmentOffset(xlogptr, wal_segsz_bytes)
XLogPageHeaderData * XLogPageHeader
#define XLByteToSeg(xlrp, logSegNo, wal_segsz_bytes)
#define XRecOffIsValid(xlrp)
#define SizeOfXLogShortPHD
static void XLogFileName(char *fname, TimeLineID tli, XLogSegNo logSegNo, int wal_segsz_bytes)
#define XLogPageHeaderSize(hdr)
#define XLByteInSeg(xlrp, logSegNo, wal_segsz_bytes)
#define LSN_FORMAT_ARGS(lsn)
#define XLogRecPtrIsInvalid(r)
#define InvalidXLogRecPtr
bool XLogRecGetBlockTagExtended(XLogReaderState *record, uint8 block_id, RelFileLocator *rlocator, ForkNumber *forknum, BlockNumber *blknum, Buffer *prefetch_buffer)
static XLogPageReadResult XLogDecodeNextRecord(XLogReaderState *state, bool nonblocking)
XLogReaderState * XLogReaderAllocate(int wal_segment_size, const char *waldir, XLogReaderRoutine *routine, void *private_data)
void XLogReaderSetDecodeBuffer(XLogReaderState *state, void *buffer, size_t size)
DecodedXLogRecord * XLogReadAhead(XLogReaderState *state, bool nonblocking)
static void WALOpenSegmentInit(WALOpenSegment *seg, WALSegmentContext *segcxt, int segsize, const char *waldir)
char * XLogRecGetBlockData(XLogReaderState *record, uint8 block_id, Size *len)
static int ReadPageInternal(XLogReaderState *state, XLogRecPtr pageptr, int reqLen)
DecodedXLogRecord * XLogNextRecord(XLogReaderState *state, char **errormsg)
static void report_invalid_record(XLogReaderState *state, const char *fmt,...) pg_attribute_printf(2
static void static void allocate_recordbuf(XLogReaderState *state, uint32 reclength)
bool WALRead(XLogReaderState *state, char *buf, XLogRecPtr startptr, Size count, TimeLineID tli, WALReadError *errinfo)
XLogRecord * XLogReadRecord(XLogReaderState *state, char **errormsg)
void XLogReaderResetError(XLogReaderState *state)
static void XLogReaderInvalReadState(XLogReaderState *state)
#define COPY_HEADER_FIELD(_dst, _size)
bool XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr, char *phdr)
FullTransactionId XLogRecGetFullXid(XLogReaderState *record)
void XLogReaderFree(XLogReaderState *state)
void XLogRecGetBlockTag(XLogReaderState *record, uint8 block_id, RelFileLocator *rlocator, ForkNumber *forknum, BlockNumber *blknum)
static void ResetDecoder(XLogReaderState *state)
bool DecodeXLogRecord(XLogReaderState *state, DecodedXLogRecord *decoded, XLogRecord *record, XLogRecPtr lsn, char **errormsg)
static bool ValidXLogRecord(XLogReaderState *state, XLogRecord *record, XLogRecPtr recptr)
#define DEFAULT_DECODE_BUFFER_SIZE
size_t DecodeXLogRecordRequiredSpace(size_t xl_tot_len)
static DecodedXLogRecord * XLogReadRecordAlloc(XLogReaderState *state, size_t xl_tot_len, bool allow_oversized)
XLogRecPtr XLogFindNextRecord(XLogReaderState *state, XLogRecPtr RecPtr)
void XLogBeginRead(XLogReaderState *state, XLogRecPtr RecPtr)
bool RestoreBlockImage(XLogReaderState *record, uint8 block_id, char *page)
XLogRecPtr XLogReleasePreviousRecord(XLogReaderState *state)
static bool ValidXLogRecordHeader(XLogReaderState *state, XLogRecPtr RecPtr, XLogRecPtr PrevRecPtr, XLogRecord *record, bool randAccess)
static bool XLogReaderHasQueuedRecordOrError(XLogReaderState *state)
#define XLogRecGetXid(decoder)
#define XLogRecHasBlockRef(decoder, block_id)
#define BKPIMAGE_COMPRESS_ZSTD
#define BKPBLOCK_FORK_MASK
#define BKPBLOCK_HAS_DATA
#define BKPIMAGE_HAS_HOLE
#define XLR_BLOCK_ID_DATA_LONG
#define BKPIMAGE_COMPRESS_LZ4
#define BKPIMAGE_COMPRESSED(info)
#define XLR_BLOCK_ID_TOPLEVEL_XID
#define XLR_BLOCK_ID_DATA_SHORT
#define BKPBLOCK_SAME_REL
#define BKPIMAGE_COMPRESS_PGLZ
#define XLR_BLOCK_ID_ORIGIN
#define BKPBLOCK_HAS_IMAGE