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md.h
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1 /*-------------------------------------------------------------------------
2  *
3  * md.h
4  * magnetic disk storage manager public interface declarations.
5  *
6  *
7  * Portions Copyright (c) 1996-2023, 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/relfilelocator.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(RelFileLocatorBackend rlocator, ForkNumber forknum, bool isRedo);
29 extern void mdextend(SMgrRelation reln, ForkNumber forknum,
30  BlockNumber blocknum, const void *buffer, bool skipFsync);
31 extern void mdzeroextend(SMgrRelation reln, ForkNumber forknum,
32  BlockNumber blocknum, int nblocks, bool skipFsync);
33 extern bool mdprefetch(SMgrRelation reln, ForkNumber forknum,
34  BlockNumber blocknum);
35 extern void mdread(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum,
36  void *buffer);
37 extern void mdwrite(SMgrRelation reln, ForkNumber forknum,
38  BlockNumber blocknum, const void *buffer, bool skipFsync);
39 extern void mdwriteback(SMgrRelation reln, ForkNumber forknum,
40  BlockNumber blocknum, BlockNumber nblocks);
41 extern BlockNumber mdnblocks(SMgrRelation reln, ForkNumber forknum);
42 extern void mdtruncate(SMgrRelation reln, ForkNumber forknum,
43  BlockNumber nblocks);
44 extern void mdimmedsync(SMgrRelation reln, ForkNumber forknum);
45 
46 extern void ForgetDatabaseSyncRequests(Oid dbid);
47 extern void DropRelationFiles(RelFileLocator *delrels, int ndelrels, bool isRedo);
48 
49 /* md sync callbacks */
50 extern int mdsyncfiletag(const FileTag *ftag, char *path);
51 extern int mdunlinkfiletag(const FileTag *ftag, char *path);
52 extern bool mdfiletagmatches(const FileTag *ftag, const FileTag *candidate);
53 
54 #endif /* MD_H */
uint32 BlockNumber
Definition: block.h:31
void mdunlink(RelFileLocatorBackend rlocator, ForkNumber forknum, bool isRedo)
Definition: md.c:306
void mdwrite(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, const void *buffer, bool skipFsync)
Definition: md.c:809
bool mdfiletagmatches(const FileTag *ftag, const FileTag *candidate)
Definition: md.c:1611
bool mdexists(SMgrRelation reln, ForkNumber forknum)
Definition: md.c:173
BlockNumber mdnblocks(SMgrRelation reln, ForkNumber forknum)
Definition: md.c:935
int mdunlinkfiletag(const FileTag *ftag, char *path)
Definition: md.c:1592
void mdcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo)
Definition: md.c:192
void mdextend(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, const void *buffer, bool skipFsync)
Definition: md.c:459
void mdinit(void)
Definition: md.c:160
void mdclose(SMgrRelation reln, ForkNumber forknum)
Definition: md.c:690
void mdzeroextend(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, int nblocks, bool skipFsync)
Definition: md.c:524
int mdsyncfiletag(const FileTag *ftag, char *path)
Definition: md.c:1539
void mdwriteback(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, BlockNumber nblocks)
Definition: md.c:876
void mdread(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum, void *buffer)
Definition: md.c:740
void mdopen(SMgrRelation reln)
Definition: md.c:679
bool mdprefetch(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum)
Definition: md.c:713
void DropRelationFiles(RelFileLocator *delrels, int ndelrels, bool isRedo)
Definition: md.c:1249
void ForgetDatabaseSyncRequests(Oid dbid)
Definition: md.c:1231
void mdtruncate(SMgrRelation reln, ForkNumber forknum, BlockNumber nblocks)
Definition: md.c:992
void mdimmedsync(SMgrRelation reln, ForkNumber forknum)
Definition: md.c:1094
unsigned int Oid
Definition: postgres_ext.h:31
ForkNumber
Definition: relpath.h:48
Definition: sync.h:51