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heap' xlog records

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This commit is contained in:
Vadim B. Mikheev
2000-06-02 10:20:27 +00:00
parent 664dd614d9
commit bf1c8f2b3b
5 changed files with 150 additions and 24 deletions
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52
src/backend/access/transam/xlog.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.14 2000/06/02 03:58:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.15 2000/06/02 10:20:25 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -219,7 +219,7 @@ static char readBuf[BLCKSZ];
static XLogRecord *nextRecord = NULL;
XLogRecPtr
XLogInsert(RmgrId rmid, char *hdr, uint32 hdrlen, char *buf, uint32 buflen)
XLogInsert(RmgrId rmid, uint8 info, char *hdr, uint32 hdrlen, char *buf, uint32 buflen)
{
XLogCtlInsert *Insert = &XLogCtl->Insert;
XLogRecord *record;
@ -231,6 +231,7 @@ XLogInsert(RmgrId rmid, char *hdr, uint32 hdrlen, char *buf, uint32 buflen)
uint16 curridx;
bool updrqst = false;
Assert(!(info & XLR_INFO_MASK));
if (len == 0 || len > MAXLOGRECSZ)
elog(STOP, "XLogInsert: invalid record len %u", len);
@ -306,7 +307,8 @@ XLogInsert(RmgrId rmid, char *hdr, uint32 hdrlen, char *buf, uint32 buflen)
}
record->xl_xid = GetCurrentTransactionId();
record->xl_len = (len > freespace) ? freespace : len;
record->xl_info = (len > freespace) ? XLR_TO_BE_CONTINUED : 0;
record->xl_info = (len > freespace) ?
(info | XLR_TO_BE_CONTINUED) : info;
record->xl_rmid = rmid;
RecPtr.xlogid = XLogCtl->xlblocks[curridx].xlogid;
RecPtr.xrecoff =
@ -318,8 +320,7 @@ XLogInsert(RmgrId rmid, char *hdr, uint32 hdrlen, char *buf, uint32 buflen)
MyProc->logRec = RecPtr;
SpinRelease(SInvalLock);
}
MyLastRecPtr = RecPtr;
RecPtr.xrecoff += record->xl_len;
MyLastRecPtr = RecPtr; /* begin of record */
Insert->currpos += SizeOfXLogRecord;
if (freespace > 0)
{
@ -364,6 +365,7 @@ nbuf:
if (hdrlen > freespace)
{
subrecord->xl_len = freespace;
/* we don't store info in subrecord' xl_info */
subrecord->xl_info = XLR_TO_BE_CONTINUED;
memcpy(Insert->currpos, hdr, freespace);
hdrlen -= freespace;
@ -383,6 +385,7 @@ nbuf:
if (buflen > freespace)
{
subrecord->xl_len += freespace;
/* we don't store info in subrecord' xl_info */
subrecord->xl_info = XLR_TO_BE_CONTINUED;
memcpy(Insert->currpos, buf, freespace);
buflen -= freespace;
@ -395,15 +398,22 @@ nbuf:
memcpy(Insert->currpos, buf, buflen);
Insert->currpos += buflen;
}
/* we don't store info in subrecord' xl_info */
subrecord->xl_info = 0;
RecPtr.xlogid = XLogCtl->xlblocks[curridx].xlogid;
RecPtr.xrecoff = XLogCtl->xlblocks[curridx].xrecoff -
BLCKSZ + SizeOfXLogPHD + subrecord->xl_len;
Insert->currpos = ((char *) Insert->currpage) +
DOUBLEALIGN(Insert->currpos - ((char *) Insert->currpage));
}
freespace = ((char *) Insert->currpage) + BLCKSZ - Insert->currpos;
/*
* Begin of the next record will be stored as LSN for
* changed data page...
*/
RecPtr.xlogid = XLogCtl->xlblocks[curridx].xlogid;
RecPtr.xrecoff =
XLogCtl->xlblocks[curridx].xrecoff - BLCKSZ +
Insert->currpos - ((char *) Insert->currpage);
/*
* All done! Update global LgwrRqst if some block was filled up.
*/
@ -884,7 +894,8 @@ got_record:;
XLogSubRecord *subrecord;
uint32 len = record->xl_len;
if (record->xl_len + RecPtr->xrecoff % BLCKSZ + SizeOfXLogRecord != BLCKSZ)
if (DOUBLEALIGN(record->xl_len) + RecPtr->xrecoff % BLCKSZ +
SizeOfXLogRecord != BLCKSZ)
{
elog(emode, "ReadRecord: invalid fragmented record len %u in (%u, %u)",
record->xl_len, RecPtr->xlogid, RecPtr->xrecoff);
@ -945,7 +956,7 @@ got_record:;
buffer += subrecord->xl_len;
if (subrecord->xl_info & XLR_TO_BE_CONTINUED)
{
if (subrecord->xl_len +
if (DOUBLEALIGN(subrecord->xl_len) +
SizeOfXLogPHD + SizeOfXLogSubRecord != BLCKSZ)
{
elog(emode, "ReadRecord: invalid fragmented subrecord len %u in logfile %u seg %u off %u",
@ -956,23 +967,26 @@ got_record:;
}
break;
}
if (BLCKSZ - SizeOfXLogRecord >=
subrecord->xl_len + SizeOfXLogPHD + SizeOfXLogSubRecord)
if (BLCKSZ - SizeOfXLogRecord >= DOUBLEALIGN(subrecord->xl_len) +
SizeOfXLogPHD + SizeOfXLogSubRecord)
{
nextRecord = (XLogRecord *)
((char *) subrecord + subrecord->xl_len + SizeOfXLogSubRecord);
nextRecord = (XLogRecord *) ((char *) subrecord +
DOUBLEALIGN(subrecord->xl_len) + SizeOfXLogSubRecord);
}
EndRecPtr.xlogid = readId;
EndRecPtr.xrecoff = readSeg * XLogSegSize + readOff * BLCKSZ +
SizeOfXLogPHD + SizeOfXLogSubRecord + subrecord->xl_len;
SizeOfXLogPHD + SizeOfXLogSubRecord +
DOUBLEALIGN(subrecord->xl_len);
ReadRecPtr = *RecPtr;
return (record);
}
if (BLCKSZ - SizeOfXLogRecord >=
record->xl_len + RecPtr->xrecoff % BLCKSZ + SizeOfXLogRecord)
nextRecord = (XLogRecord *) ((char *) record + record->xl_len + SizeOfXLogRecord);
if (BLCKSZ - SizeOfXLogRecord >= DOUBLEALIGN(record->xl_len) +
RecPtr->xrecoff % BLCKSZ + SizeOfXLogRecord)
nextRecord = (XLogRecord *) ((char *) record +
DOUBLEALIGN(record->xl_len) + SizeOfXLogRecord);
EndRecPtr.xlogid = RecPtr->xlogid;
EndRecPtr.xrecoff = RecPtr->xrecoff + record->xl_len + SizeOfXLogRecord;
EndRecPtr.xrecoff = RecPtr->xrecoff +
DOUBLEALIGN(record->xl_len) + SizeOfXLogRecord;
ReadRecPtr = *RecPtr;
return (record);