Add some elog(DEBUG)'s to help diagnose mdblindwrt failures.

diff --git a/src/backend/storage/smgr/md.c b/src/backend/storage/smgr/md.c
index e4fee43220520fcc1583042eea976425886bc8ba..e4fd3120d2ca74518421425a2e1409460c70ab21 100644 (file)
--- a/src/backend/storage/smgr/md.c
+++ b/src/backend/storage/smgr/md.c
@@ -8,10 +8,11 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.67 2000/04/12 17:15:41 momjian Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.68 2000/05/25 23:30:20 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
+#include 
 #include 
 #include 
 #include 
@@ -609,8 +610,11 @@ mdblindwrt(char *dbname,
    seekpos = (long) (BLCKSZ * (blkno));
 #endif
 
+   errno = 0;
+
    if (lseek(fd, seekpos, SEEK_SET) != seekpos)
    {
+       elog(DEBUG, "mdblindwrt: lseek(%ld) failed: %m", seekpos);
        close(fd);
        return SM_FAIL;
    }
@@ -619,13 +623,22 @@ mdblindwrt(char *dbname,
 
    /* write and optionally sync the block */
    if (write(fd, buffer, BLCKSZ) != BLCKSZ)
+   {
+       elog(DEBUG, "mdblindwrt: write() failed: %m");
        status = SM_FAIL;
+   }
    else if (dofsync &&
             pg_fsync(fd) < 0)
+   {
+       elog(DEBUG, "mdblindwrt: fsync() failed: %m");
        status = SM_FAIL;
+   }
 
    if (close(fd) < 0)
+   {
+       elog(DEBUG, "mdblindwrt: close() failed: %m");
        status = SM_FAIL;
+   }
 
    return status;
 }
@@ -1122,6 +1135,9 @@ _mdfd_blind_getseg(char *dbname, char *relname, Oid dbid, Oid relid,
    fd = open(path, O_RDWR | O_BINARY, 0600);
 #endif
 
+   if (fd < 0)
+       elog(DEBUG, "_mdfd_blind_getseg: couldn't open %s: %m", path);
+
    pfree(path);
 
    return fd;