granicus.if.org Git - postgresql/blob - src/backend/access/rmgrdesc/smgrdesc.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * smgrdesc.c
   4  *        rmgr descriptor routines for catalog/storage.c
   5  *
   6  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  *
  10  * IDENTIFICATION
  11  *        src/backend/access/rmgrdesc/smgrdesc.c
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #include "postgres.h"
  16
  17 #include "catalog/storage_xlog.h"
  18
  19
  20 void
  21 smgr_desc(StringInfo buf, XLogReaderState *record)
  22 {
  23         char       *rec = XLogRecGetData(record);
  24         uint8           info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
  25
  26         if (info == XLOG_SMGR_CREATE)
  27         {
  28                 xl_smgr_create *xlrec = (xl_smgr_create *) rec;
  29                 char       *path = relpathperm(xlrec->rnode, xlrec->forkNum);
  30
  31                 appendStringInfoString(buf, path);
  32                 pfree(path);
  33         }
  34         else if (info == XLOG_SMGR_TRUNCATE)
  35         {
  36                 xl_smgr_truncate *xlrec = (xl_smgr_truncate *) rec;
  37                 char       *path = relpathperm(xlrec->rnode, MAIN_FORKNUM);
  38
  39                 appendStringInfo(buf, "%s to %u blocks flags %d", path,
  40                                                  xlrec->blkno, xlrec->flags);
  41                 pfree(path);
  42         }
  43 }
  44
  45 const char *
  46 smgr_identify(uint8 info)
  47 {
  48         const char *id = NULL;
  49
  50         switch (info & ~XLR_INFO_MASK)
  51         {
  52                 case XLOG_SMGR_CREATE:
  53                         id = "CREATE";
  54                         break;
  55                 case XLOG_SMGR_TRUNCATE:
  56                         id = "TRUNCATE";
  57                         break;
  58         }
  59
  60         return id;
  61 }