src/include/storage/md.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * md.h
   4  *        magnetic disk storage manager public interface declarations.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * src/include/storage/md.h
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef MD_H
  15 #define MD_H
  16
  17 #include "storage/block.h"
  18 #include "storage/relfilenode.h"
  19 #include "storage/smgr.h"
  20 #include "storage/sync.h"
  21
  22 /* md storage manager functionality */
  23 extern void mdinit(void);
  24 extern void mdopen(SMgrRelation reln);
  25 extern void mdclose(SMgrRelation reln, ForkNumber forknum);
  26 extern void mdcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo);
  27 extern bool mdexists(SMgrRelation reln, ForkNumber forknum);
  28 extern void mdunlink(RelFileNodeBackend rnode, ForkNumber forknum, bool isRedo);
  29 extern void mdextend(SMgrRelation reln, ForkNumber forknum,
  30                                          BlockNumber blocknum, char *buffer, bool skipFsync);
  31 extern bool mdprefetch(SMgrRelation reln, ForkNumber forknum,
  32                                            BlockNumber blocknum);
  33 extern void mdread(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum,
  34                                    char *buffer);
  35 extern void mdwrite(SMgrRelation reln, ForkNumber forknum,
  36                                         BlockNumber blocknum, char *buffer, bool skipFsync);
  37 extern void mdwriteback(SMgrRelation reln, ForkNumber forknum,
  38                                                 BlockNumber blocknum, BlockNumber nblocks);
  39 extern BlockNumber mdnblocks(SMgrRelation reln, ForkNumber forknum);
  40 extern void mdtruncate(SMgrRelation reln, ForkNumber forknum,
  41                                            BlockNumber nblocks);
  42 extern void mdimmedsync(SMgrRelation reln, ForkNumber forknum);
  43
  44 extern void ForgetDatabaseSyncRequests(Oid dbid);
  45 extern void DropRelationFiles(RelFileNode *delrels, int ndelrels, bool isRedo);
  46
  47 /* md sync callbacks */
  48 extern int      mdsyncfiletag(const FileTag *ftag, char *path);
  49 extern int      mdunlinkfiletag(const FileTag *ftag, char *path);
  50 extern bool mdfiletagmatches(const FileTag *ftag, const FileTag *candidate);
  51
  52 #endif                                                  /* MD_H */