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/*-------------------------------------------------------------------------
*
* standbydesc.c
* rmgr descriptor routines for storage/ipc/standby.c
*
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/standbydesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "storage/standbydefs.h"
static void
standby_desc_running_xacts(StringInfo buf, xl_running_xacts *xlrec)
{
int i;
appendStringInfo(buf, "nextXid %u latestCompletedXid %u oldestRunningXid %u",
xlrec->nextXid,
xlrec->latestCompletedXid,
xlrec->oldestRunningXid);
if (xlrec->xcnt > 0)
{
appendStringInfo(buf, "; %d xacts:", xlrec->xcnt);
for (i = 0; i < xlrec->xcnt; i++)
appendStringInfo(buf, " %u", xlrec->xids[i]);
}
if (xlrec->subxid_overflow)
appendStringInfoString(buf, "; subxid ovf");
}
void
standby_desc(StringInfo buf, XLogReaderState *record)
{
char *rec = XLogRecGetData(record);
uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
if (info == XLOG_STANDBY_LOCK)
{
xl_standby_locks *xlrec = (xl_standby_locks *) rec;
int i;
for (i = 0; i < xlrec->nlocks; i++)
appendStringInfo(buf, "xid %u db %u rel %u ",
xlrec->locks[i].xid, xlrec->locks[i].dbOid,
xlrec->locks[i].relOid);
}
else if (info == XLOG_RUNNING_XACTS)
{
xl_running_xacts *xlrec = (xl_running_xacts *) rec;
standby_desc_running_xacts(buf, xlrec);
}
else if (info == XLOG_INVALIDATIONS)
{
xl_invalidations *xlrec = (xl_invalidations *) rec;
standby_desc_invalidations(buf, xlrec->nmsgs, xlrec->msgs,
xlrec->dbId, xlrec->tsId,
xlrec->relcacheInitFileInval);
}
}
const char *
standby_identify(uint8 info)
{
const char *id = NULL;
switch (info & ~XLR_INFO_MASK)
{
case XLOG_STANDBY_LOCK:
id = "LOCK";
break;
case XLOG_RUNNING_XACTS:
id = "RUNNING_XACTS";
break;
case XLOG_INVALIDATIONS:
id = "INVALIDATIONS";
break;
}
return id;
}
/*
* This routine is used by both standby_desc and xact_desc, because
* transaction commits and XLOG_INVALIDATIONS messages contain invalidations;
* it seems pointless to duplicate the code.
*/
void
standby_desc_invalidations(StringInfo buf,
int nmsgs, SharedInvalidationMessage *msgs,
Oid dbId, Oid tsId,
bool relcacheInitFileInval)
{
int i;
/* Do nothing if there are no invalidation messages */
if (nmsgs <= 0)
return;
if (relcacheInitFileInval)
appendStringInfo(buf, "; relcache init file inval dbid %u tsid %u",
dbId, tsId);
appendStringInfoString(buf, "; inval msgs:");
for (i = 0; i < nmsgs; i++)
{
SharedInvalidationMessage *msg = &msgs[i];
if (msg->id >= 0)
appendStringInfo(buf, " catcache %d", msg->id);
else if (msg->id == SHAREDINVALCATALOG_ID)
appendStringInfo(buf, " catalog %u", msg->cat.catId);
else if (msg->id == SHAREDINVALRELCACHE_ID)
appendStringInfo(buf, " relcache %u", msg->rc.relId);
/* not expected, but print something anyway */
else if (msg->id == SHAREDINVALSMGR_ID)
appendStringInfoString(buf, " smgr");
/* not expected, but print something anyway */
else if (msg->id == SHAREDINVALRELMAP_ID)
appendStringInfo(buf, " relmap db %u", msg->rm.dbId);
else if (msg->id == SHAREDINVALSNAPSHOT_ID)
appendStringInfo(buf, " snapshot %u", msg->sn.relId);
else
appendStringInfo(buf, " unrecognized id %d", msg->id);
}
}
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