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Commit09b5271

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Add a field to the first page of each WAL file to indicate the
XLOG_BLCKSZ. This ought to help in preventing configuration mismatchproblems if anyone tries to ship PITR files between servers compiledwith different XLOG_BLCKSZ settings. Simon Riggs
1 parente6140d9 commit09b5271

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3 files changed

+15
-4
lines changed

3 files changed

+15
-4
lines changed

‎src/backend/access/transam/xlog.c‎

Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.233 2006/04/04 22:39:59 tgl Exp $
10+
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.234 2006/04/05 03:34:05 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -1265,6 +1265,7 @@ AdvanceXLInsertBuffer(void)
12651265

12661266
NewLongPage->xlp_sysid=ControlFile->system_identifier;
12671267
NewLongPage->xlp_seg_size=XLogSegSize;
1268+
NewLongPage->xlp_xlog_blcksz=XLOG_BLCKSZ;
12681269
NewPage->xlp_info |=XLP_LONG_HEADER;
12691270

12701271
Insert->currpos= ((char*)NewPage)+SizeOfXLogLongPHD;
@@ -2994,6 +2995,13 @@ ValidXLOGHeader(XLogPageHeader hdr, int emode)
29942995
errdetail("Incorrect XLOG_SEG_SIZE in page header.")));
29952996
return false;
29962997
}
2998+
if (longhdr->xlp_xlog_blcksz!=XLOG_BLCKSZ)
2999+
{
3000+
ereport(emode,
3001+
(errmsg("WAL file is from different system"),
3002+
errdetail("Incorrect XLOG_BLCKSZ in page header.")));
3003+
return false;
3004+
}
29973005
}
29983006
recaddr.xlogid=readId;
29993007
recaddr.xrecoff=readSeg*XLogSegSize+readOff;
@@ -3838,6 +3846,7 @@ BootStrapXLOG(void)
38383846
longpage= (XLogLongPageHeader)page;
38393847
longpage->xlp_sysid=sysidentifier;
38403848
longpage->xlp_seg_size=XLogSegSize;
3849+
longpage->xlp_xlog_blcksz=XLOG_BLCKSZ;
38413850

38423851
/* Insert the initial checkpoint record */
38433852
record= (XLogRecord*) ((char*)page+SizeOfXLogLongPHD);

‎src/bin/pg_resetxlog/pg_resetxlog.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -23,7 +23,7 @@
2323
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
2424
* Portions Copyright (c) 1994, Regents of the University of California
2525
*
26-
* $PostgreSQL: pgsql/src/bin/pg_resetxlog/pg_resetxlog.c,v 1.42 2006/04/04 22:39:59 tgl Exp $
26+
* $PostgreSQL: pgsql/src/bin/pg_resetxlog/pg_resetxlog.c,v 1.43 2006/04/05 03:34:05 tgl Exp $
2727
*
2828
*-------------------------------------------------------------------------
2929
*/
@@ -723,6 +723,7 @@ WriteEmptyXLOG(void)
723723
longpage= (XLogLongPageHeader)page;
724724
longpage->xlp_sysid=ControlFile.system_identifier;
725725
longpage->xlp_seg_size=XLogSegSize;
726+
longpage->xlp_xlog_blcksz=XLOG_BLCKSZ;
726727

727728
/* Insert the initial checkpoint record */
728729
record= (XLogRecord*) ((char*)page+SizeOfXLogLongPHD);

‎src/include/access/xlog_internal.h‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -11,7 +11,7 @@
1111
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
1212
* Portions Copyright (c) 1994, Regents of the University of California
1313
*
14-
* $PostgreSQL: pgsql/src/include/access/xlog_internal.h,v 1.12 2006/04/03 23:35:04 tgl Exp $
14+
* $PostgreSQL: pgsql/src/include/access/xlog_internal.h,v 1.13 2006/04/05 03:34:05 tgl Exp $
1515
*/
1616
#ifndefXLOG_INTERNAL_H
1717
#defineXLOG_INTERNAL_H
@@ -69,7 +69,7 @@ typedef struct XLogContRecord
6969
/*
7070
* Each page of XLOG file has a header like this:
7171
*/
72-
#defineXLOG_PAGE_MAGIC0xD05D/* can be used as WAL version indicator */
72+
#defineXLOG_PAGE_MAGIC0xD05E/* can be used as WAL version indicator */
7373

7474
typedefstructXLogPageHeaderData
7575
{
@@ -93,6 +93,7 @@ typedef struct XLogLongPageHeaderData
9393
XLogPageHeaderDatastd;/* standard header fields */
9494
uint64xlp_sysid;/* system identifier from pg_control */
9595
uint32xlp_seg_size;/* just as a cross-check */
96+
uint32xlp_xlog_blcksz;/* just as a cross-check */
9697
}XLogLongPageHeaderData;
9798

9899
#defineSizeOfXLogLongPHDMAXALIGN(sizeof(XLogLongPageHeaderData))

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