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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 mismatch
problems if anyone tries to ship PITR files between servers compiled
with different XLOG_BLCKSZ settings.  Simon Riggs
This commit is contained in:
Tom Lane 2006-04-05 03:34:05 +00:00
parent e6140d9052
commit 09b5271ebd
3 changed files with 15 additions and 4 deletions
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11
src/backend/access/transam/xlog.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.233 2006/04/04 22:39:59 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.234 2006/04/05 03:34:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1265,6 +1265,7 @@ AdvanceXLInsertBuffer(void)
NewLongPage->xlp_sysid = ControlFile->system_identifier;
NewLongPage->xlp_seg_size = XLogSegSize;
NewLongPage->xlp_xlog_blcksz = XLOG_BLCKSZ;
NewPage ->xlp_info |= XLP_LONG_HEADER;
Insert->currpos = ((char *) NewPage) +SizeOfXLogLongPHD;
@ -2994,6 +2995,13 @@ ValidXLOGHeader(XLogPageHeader hdr, int emode)
errdetail("Incorrect XLOG_SEG_SIZE in page header.")));
return false;
}
if (longhdr->xlp_xlog_blcksz != XLOG_BLCKSZ)
{
ereport(emode,
(errmsg("WAL file is from different system"),
errdetail("Incorrect XLOG_BLCKSZ in page header.")));
return false;
}
}
recaddr.xlogid = readId;
recaddr.xrecoff = readSeg * XLogSegSize + readOff;
@ -3838,6 +3846,7 @@ BootStrapXLOG(void)
longpage = (XLogLongPageHeader) page;
longpage->xlp_sysid = sysidentifier;
longpage->xlp_seg_size = XLogSegSize;
longpage->xlp_xlog_blcksz = XLOG_BLCKSZ;
/* Insert the initial checkpoint record */
record = (XLogRecord *) ((char *) page + SizeOfXLogLongPHD);

3
src/bin/pg_resetxlog/pg_resetxlog.c
View File

@ -23,7 +23,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/bin/pg_resetxlog/pg_resetxlog.c,v 1.42 2006/04/04 22:39:59 tgl Exp $
* $PostgreSQL: pgsql/src/bin/pg_resetxlog/pg_resetxlog.c,v 1.43 2006/04/05 03:34:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -723,6 +723,7 @@ WriteEmptyXLOG(void)
longpage = (XLogLongPageHeader) page;
longpage->xlp_sysid = ControlFile.system_identifier;
longpage->xlp_seg_size = XLogSegSize;
longpage->xlp_xlog_blcksz = XLOG_BLCKSZ;
/* Insert the initial checkpoint record */
record = (XLogRecord *) ((char *) page + SizeOfXLogLongPHD);

5
src/include/access/xlog_internal.h
View File

@ -11,7 +11,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlog_internal.h,v 1.12 2006/04/03 23:35:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xlog_internal.h,v 1.13 2006/04/05 03:34:05 tgl Exp $
*/
#ifndef XLOG_INTERNAL_H
#define XLOG_INTERNAL_H
@ -69,7 +69,7 @@ typedef struct XLogContRecord
/*
* Each page of XLOG file has a header like this:
*/
#define XLOG_PAGE_MAGIC 0xD05D /* can be used as WAL version indicator */
#define XLOG_PAGE_MAGIC 0xD05E /* can be used as WAL version indicator */
typedef struct XLogPageHeaderData
{
@ -93,6 +93,7 @@ typedef struct XLogLongPageHeaderData
XLogPageHeaderData std; /* standard header fields */
uint64 xlp_sysid; /* system identifier from pg_control */
uint32 xlp_seg_size; /* just as a cross-check */
uint32 xlp_xlog_blcksz; /* just as a cross-check */
} XLogLongPageHeaderData;
#define SizeOfXLogLongPHD MAXALIGN(sizeof(XLogLongPageHeaderData))