smgrdesc.c

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * smgrdesc.c
 *    rmgr descriptor routines for catalog/storage.c
 *
 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    src/backend/access/rmgrdesc/smgrdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"
 
#include "catalog/storage_xlog.h"
 
 
void
smgr_desc(StringInfo buf, XLogReaderState *record)
{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
 
    if (info == XLOG_SMGR_CREATE)
    {
        xl_smgr_create *xlrec = (xl_smgr_create *) rec;
        char       *path = relpathperm(xlrec->rlocator, xlrec->forkNum);
 
        appendStringInfoString(buf, path);
        pfree(path);
    }
    else if (info == XLOG_SMGR_TRUNCATE)
    {
        xl_smgr_truncate *xlrec = (xl_smgr_truncate *) rec;
        char       *path = relpathperm(xlrec->rlocator, MAIN_FORKNUM);
 
        appendStringInfo(buf, "%s to %u blocks flags %d", path,
                         xlrec->blkno, xlrec->flags);
        pfree(path);
    }
}
 
const char *
smgr_identify(uint8 info)
{
    const char *id = NULL;
 
    switch (info & ~XLR_INFO_MASK)
    {
        case XLOG_SMGR_CREATE:
            id = "CREATE";
            break;
        case XLOG_SMGR_TRUNCATE:
            id = "TRUNCATE";
            break;
    }
 
    return id;
}