1996-07-09 08:22:35 +02:00
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|
/*-------------------------------------------------------------------------
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*
|
1999-02-14 00:22:53 +01:00
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|
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* smgr.c
|
1997-09-07 07:04:48 +02:00
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|
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* public interface routines to storage manager switch.
|
1996-07-09 08:22:35 +02:00
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*
|
1997-09-07 07:04:48 +02:00
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|
|
* All file system operations in POSTGRES dispatch through these
|
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|
|
* routines.
|
1996-07-09 08:22:35 +02:00
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*
|
2003-08-04 04:40:20 +02:00
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|
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
|
2000-01-26 06:58:53 +01:00
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* Portions Copyright (c) 1994, Regents of the University of California
|
1996-07-09 08:22:35 +02:00
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*
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|
*
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|
|
* IDENTIFICATION
|
2004-02-10 02:55:27 +01:00
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* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.69 2004/02/10 01:55:26 tgl Exp $
|
1996-07-09 08:22:35 +02:00
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|
*
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|
*-------------------------------------------------------------------------
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|
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|
*/
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|
#include "postgres.h"
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|
|
|
|
2000-11-08 23:10:03 +01:00
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|
|
#include "storage/bufmgr.h"
|
2001-06-28 01:31:40 +02:00
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|
#include "storage/freespace.h"
|
2001-09-29 06:02:27 +02:00
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|
#include "storage/ipc.h"
|
1996-11-03 06:08:01 +01:00
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|
|
#include "storage/smgr.h"
|
2004-02-10 02:55:27 +01:00
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|
|
#include "utils/hsearch.h"
|
2000-11-08 23:10:03 +01:00
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|
|
#include "utils/memutils.h"
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|
1996-07-09 08:22:35 +02:00
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|
2004-02-10 02:55:27 +01:00
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|
|
/*
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|
|
* This struct of function pointers defines the API between smgr.c and
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* any individual storage manager module. Note that smgr subfunctions are
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* generally expected to return TRUE on success, FALSE on error. (For
|
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* nblocks and truncate we instead say that returning InvalidBlockNumber
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* indicates an error.)
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|
*/
|
1997-09-07 07:04:48 +02:00
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|
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typedef struct f_smgr
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|
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{
|
2004-02-10 02:55:27 +01:00
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|
|
bool (*smgr_init) (void); /* may be NULL */
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|
bool (*smgr_shutdown) (void); /* may be NULL */
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|
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bool (*smgr_close) (SMgrRelation reln);
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bool (*smgr_create) (SMgrRelation reln, bool isRedo);
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bool (*smgr_unlink) (RelFileNode rnode, bool isRedo);
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bool (*smgr_extend) (SMgrRelation reln, BlockNumber blocknum,
|
2001-10-25 07:50:21 +02:00
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|
char *buffer);
|
2004-02-10 02:55:27 +01:00
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bool (*smgr_read) (SMgrRelation reln, BlockNumber blocknum,
|
2001-10-25 07:50:21 +02:00
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|
char *buffer);
|
2004-02-10 02:55:27 +01:00
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bool (*smgr_write) (SMgrRelation reln, BlockNumber blocknum,
|
2001-10-25 07:50:21 +02:00
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|
char *buffer);
|
2004-02-10 02:55:27 +01:00
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BlockNumber (*smgr_nblocks) (SMgrRelation reln);
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BlockNumber (*smgr_truncate) (SMgrRelation reln, BlockNumber nblocks);
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bool (*smgr_commit) (void); /* may be NULL */
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bool (*smgr_abort) (void); /* may be NULL */
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bool (*smgr_sync) (void); /* may be NULL */
|
1997-09-08 23:56:23 +02:00
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} f_smgr;
|
1996-07-09 08:22:35 +02:00
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|
2004-02-10 02:55:27 +01:00
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static const f_smgr smgrsw[] = {
|
1997-09-07 07:04:48 +02:00
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|
/* magnetic disk */
|
2004-02-10 02:55:27 +01:00
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|
|
{mdinit, NULL, mdclose, mdcreate, mdunlink, mdextend,
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mdread, mdwrite, mdnblocks, mdtruncate, mdcommit, mdabort, mdsync
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}
|
1996-07-09 08:22:35 +02:00
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|
};
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|
2004-02-10 02:55:27 +01:00
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static const int NSmgr = lengthof(smgrsw);
|
1996-07-09 08:22:35 +02:00
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|
1998-10-08 20:30:52 +02:00
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|
2004-02-10 02:55:27 +01:00
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/*
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* Each backend has a hashtable that stores all extant SMgrRelation objects.
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|
*/
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static HTAB *SMgrRelationHash = NULL;
|
1996-07-09 08:22:35 +02:00
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|
2000-11-08 23:10:03 +01:00
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|
/*
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|
* We keep a list of all relations (represented as RelFileNode values)
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* that have been created or deleted in the current transaction. When
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* a relation is created, we create the physical file immediately, but
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* remember it so that we can delete the file again if the current
|
2001-03-22 05:01:46 +01:00
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* transaction is aborted. Conversely, a deletion request is NOT
|
2000-11-08 23:10:03 +01:00
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|
* executed immediately, but is just entered in the list. When and if
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|
* the transaction commits, we can delete the physical file.
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*
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|
* NOTE: the list is kept in TopMemoryContext to be sure it won't disappear
|
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|
* unbetimes. It'd probably be OK to keep it in TopTransactionContext,
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|
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|
* but I'm being paranoid.
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|
*/
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|
|
typedef struct PendingRelDelete
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|
|
{
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|
RelFileNode relnode; /* relation that may need to be deleted */
|
2004-02-10 02:55:27 +01:00
|
|
|
int which; /* which storage manager? */
|
2002-08-06 04:36:35 +02:00
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|
bool isTemp; /* is it a temporary relation? */
|
2001-03-22 05:01:46 +01:00
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|
bool atCommit; /* T=delete at commit; F=delete at abort */
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struct PendingRelDelete *next; /* linked-list link */
|
2000-11-08 23:10:03 +01:00
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|
} PendingRelDelete;
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|
2001-03-22 05:01:46 +01:00
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|
static PendingRelDelete *pendingDeletes = NULL; /* head of linked list */
|
2000-11-08 23:10:03 +01:00
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|
2004-02-10 02:55:27 +01:00
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|
/* local function prototypes */
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|
static void smgrshutdown(int code, Datum arg);
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|
static void smgr_internal_unlink(RelFileNode rnode, int which,
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bool isTemp, bool isRedo);
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|
1996-07-09 08:22:35 +02:00
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|
|
/*
|
1997-09-07 07:04:48 +02:00
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|
|
* smgrinit(), smgrshutdown() -- Initialize or shut down all storage
|
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|
|
* managers.
|
1996-07-09 08:22:35 +02:00
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|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* Note: in the normal multiprocess scenario with a postmaster, these are
|
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|
|
* called at postmaster start and stop, not per-backend.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
2002-08-06 04:36:35 +02:00
|
|
|
smgrinit(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
int i;
|
1997-09-07 07:04:48 +02:00
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|
for (i = 0; i < NSmgr; i++)
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|
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|
{
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|
|
if (smgrsw[i].smgr_init)
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|
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|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[i].smgr_init)) ())
|
2003-07-25 00:04:15 +02:00
|
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|
elog(FATAL, "smgr initialization failed on %s: %m",
|
2000-06-05 09:29:25 +02:00
|
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|
DatumGetCString(DirectFunctionCall1(smgrout,
|
2001-03-22 05:01:46 +01:00
|
|
|
Int16GetDatum(i))));
|
1997-09-07 07:04:48 +02:00
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
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|
|
1997-09-07 07:04:48 +02:00
|
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|
/* register the shutdown proc */
|
2000-10-02 21:42:56 +02:00
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|
on_proc_exit(smgrshutdown, 0);
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
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|
|
1997-08-19 23:40:56 +02:00
|
|
|
static void
|
2003-12-12 19:45:10 +01:00
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|
|
smgrshutdown(int code, Datum arg)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
int i;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
for (i = 0; i < NSmgr; i++)
|
|
|
|
{
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|
|
|
if (smgrsw[i].smgr_shutdown)
|
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|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[i].smgr_shutdown)) ())
|
2003-07-25 00:04:15 +02:00
|
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|
elog(FATAL, "smgr shutdown failed on %s: %m",
|
2000-06-05 09:29:25 +02:00
|
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|
DatumGetCString(DirectFunctionCall1(smgrout,
|
2001-03-22 05:01:46 +01:00
|
|
|
Int16GetDatum(i))));
|
1997-09-07 07:04:48 +02:00
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
/*
|
|
|
|
* smgropen() -- Return an SMgrRelation object, creating it if need be.
|
|
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|
*
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|
|
* This does not attempt to actually open the object.
|
|
|
|
*/
|
|
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|
SMgrRelation
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|
smgropen(RelFileNode rnode)
|
|
|
|
{
|
|
|
|
SMgrRelation reln;
|
|
|
|
bool found;
|
|
|
|
|
|
|
|
if (SMgrRelationHash == NULL)
|
|
|
|
{
|
|
|
|
/* First time through: initialize the hash table */
|
|
|
|
HASHCTL ctl;
|
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|
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|
|
MemSet(&ctl, 0, sizeof(ctl));
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|
|
|
ctl.keysize = sizeof(RelFileNode);
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|
|
|
ctl.entrysize = sizeof(SMgrRelationData);
|
|
|
|
ctl.hash = tag_hash;
|
|
|
|
SMgrRelationHash = hash_create("smgr relation table", 400,
|
|
|
|
&ctl, HASH_ELEM | HASH_FUNCTION);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Look up or create an entry */
|
|
|
|
reln = (SMgrRelation) hash_search(SMgrRelationHash,
|
|
|
|
(void *) &rnode,
|
|
|
|
HASH_ENTER, &found);
|
|
|
|
if (reln == NULL)
|
|
|
|
ereport(ERROR,
|
|
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
|
|
errmsg("out of memory")));
|
|
|
|
|
|
|
|
/* Initialize it if not present before */
|
|
|
|
if (!found)
|
|
|
|
{
|
|
|
|
/* hash_search already filled in the lookup key */
|
|
|
|
reln->smgr_which = 0; /* we only have md.c at present */
|
|
|
|
reln->md_fd = NULL; /* mark it not open */
|
|
|
|
}
|
|
|
|
|
|
|
|
return reln;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* smgrclose() -- Close and delete an SMgrRelation object.
|
|
|
|
*
|
|
|
|
* It is the caller's responsibility not to leave any dangling references
|
|
|
|
* to the object. (Pointers should be cleared after successful return;
|
|
|
|
* on the off chance of failure, the SMgrRelation object will still exist.)
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
smgrclose(SMgrRelation reln)
|
|
|
|
{
|
|
|
|
if (! (*(smgrsw[reln->smgr_which].smgr_close)) (reln))
|
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
|
|
|
errmsg("could not close relation %u/%u: %m",
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode)));
|
|
|
|
|
|
|
|
if (hash_search(SMgrRelationHash,
|
|
|
|
(void *) &(reln->smgr_rnode),
|
|
|
|
HASH_REMOVE, NULL) == NULL)
|
|
|
|
elog(ERROR, "SMgrRelation hashtable corrupted");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* smgrcloseall() -- Close all existing SMgrRelation objects.
|
|
|
|
*
|
|
|
|
* It is the caller's responsibility not to leave any dangling references.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
smgrcloseall(void)
|
|
|
|
{
|
|
|
|
HASH_SEQ_STATUS status;
|
|
|
|
SMgrRelation reln;
|
|
|
|
|
|
|
|
/* Nothing to do if hashtable not set up */
|
|
|
|
if (SMgrRelationHash == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
hash_seq_init(&status, SMgrRelationHash);
|
|
|
|
|
|
|
|
while ((reln = (SMgrRelation) hash_seq_search(&status)) != NULL)
|
|
|
|
{
|
|
|
|
smgrclose(reln);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* smgrclosenode() -- Close SMgrRelation object for given RelFileNode,
|
|
|
|
* if one exists.
|
|
|
|
*
|
|
|
|
* This has the same effects as smgrclose(smgropen(rnode)), but it avoids
|
|
|
|
* uselessly creating a hashtable entry only to drop it again when no
|
|
|
|
* such entry exists already.
|
|
|
|
*
|
|
|
|
* It is the caller's responsibility not to leave any dangling references.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
smgrclosenode(RelFileNode rnode)
|
|
|
|
{
|
|
|
|
SMgrRelation reln;
|
|
|
|
|
|
|
|
/* Nothing to do if hashtable not set up */
|
|
|
|
if (SMgrRelationHash == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
reln = (SMgrRelation) hash_search(SMgrRelationHash,
|
|
|
|
(void *) &rnode,
|
|
|
|
HASH_FIND, NULL);
|
|
|
|
if (reln != NULL)
|
|
|
|
smgrclose(reln);
|
|
|
|
}
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
/*
|
1997-09-07 07:04:48 +02:00
|
|
|
* smgrcreate() -- Create a new relation.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* Given an already-created (but presumably unused) SMgrRelation,
|
|
|
|
* cause the underlying disk file or other storage to be created.
|
|
|
|
*
|
|
|
|
* If isRedo is true, it is okay for the underlying file to exist
|
|
|
|
* already because we are in a WAL replay sequence. In this case
|
|
|
|
* we should make no PendingRelDelete entry; the WAL sequence will
|
|
|
|
* tell whether to drop the file.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrcreate(SMgrRelation reln, bool isTemp, bool isRedo)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2000-11-08 23:10:03 +01:00
|
|
|
PendingRelDelete *pending;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[reln->smgr_which].smgr_create)) (reln, isRedo))
|
2003-07-25 00:04:15 +02:00
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
2004-02-10 02:55:27 +01:00
|
|
|
errmsg("could not create relation %u/%u: %m",
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode)));
|
|
|
|
|
|
|
|
if (isRedo)
|
|
|
|
return;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
2000-11-08 23:10:03 +01:00
|
|
|
/* Add the relation to the list of stuff to delete at abort */
|
|
|
|
pending = (PendingRelDelete *)
|
|
|
|
MemoryContextAlloc(TopMemoryContext, sizeof(PendingRelDelete));
|
2004-02-10 02:55:27 +01:00
|
|
|
pending->relnode = reln->smgr_rnode;
|
|
|
|
pending->which = reln->smgr_which;
|
|
|
|
pending->isTemp = isTemp;
|
2000-11-08 23:10:03 +01:00
|
|
|
pending->atCommit = false; /* delete if abort */
|
|
|
|
pending->next = pendingDeletes;
|
|
|
|
pendingDeletes = pending;
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2004-02-10 02:55:27 +01:00
|
|
|
* smgrscheduleunlink() -- Schedule unlinking a relation at xact commit.
|
|
|
|
*
|
|
|
|
* The relation is marked to be removed from the store if we
|
|
|
|
* successfully commit the current transaction.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* This also implies smgrclose() on the SMgrRelation object.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrscheduleunlink(SMgrRelation reln, bool isTemp)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2000-11-08 23:10:03 +01:00
|
|
|
PendingRelDelete *pending;
|
|
|
|
|
|
|
|
/* Add the relation to the list of stuff to delete at commit */
|
|
|
|
pending = (PendingRelDelete *)
|
|
|
|
MemoryContextAlloc(TopMemoryContext, sizeof(PendingRelDelete));
|
2004-02-10 02:55:27 +01:00
|
|
|
pending->relnode = reln->smgr_rnode;
|
|
|
|
pending->which = reln->smgr_which;
|
|
|
|
pending->isTemp = isTemp;
|
2000-11-08 23:10:03 +01:00
|
|
|
pending->atCommit = true; /* delete if commit */
|
|
|
|
pending->next = pendingDeletes;
|
|
|
|
pendingDeletes = pending;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* NOTE: if the relation was created in this transaction, it will now
|
2001-03-22 05:01:46 +01:00
|
|
|
* be present in the pending-delete list twice, once with atCommit
|
|
|
|
* true and once with atCommit false. Hence, it will be physically
|
|
|
|
* deleted at end of xact in either case (and the other entry will be
|
|
|
|
* ignored by smgrDoPendingDeletes, so no error will occur). We could
|
|
|
|
* instead remove the existing list entry and delete the physical file
|
2000-11-08 23:10:03 +01:00
|
|
|
* immediately, but for now I'll keep the logic simple.
|
|
|
|
*/
|
1996-07-09 08:22:35 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
/* Now close the file and throw away the hashtable entry */
|
|
|
|
smgrclose(reln);
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2004-02-10 02:55:27 +01:00
|
|
|
* smgrdounlink() -- Immediately unlink a relation.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* The relation is removed from the store. This should not be used
|
|
|
|
* during transactional operations, since it can't be undone.
|
2001-05-10 22:38:49 +02:00
|
|
|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* If isRedo is true, it is okay for the underlying file to be gone
|
|
|
|
* already. (In practice isRedo will always be true.)
|
|
|
|
*
|
|
|
|
* This also implies smgrclose() on the SMgrRelation object.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrdounlink(SMgrRelation reln, bool isTemp, bool isRedo)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
RelFileNode rnode = reln->smgr_rnode;
|
|
|
|
int which = reln->smgr_which;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
/* Close the file and throw away the hashtable entry */
|
|
|
|
smgrclose(reln);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
smgr_internal_unlink(rnode, which, isTemp, isRedo);
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2004-02-10 02:55:27 +01:00
|
|
|
* Shared subroutine that actually does the unlink ...
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
static void
|
|
|
|
smgr_internal_unlink(RelFileNode rnode, int which, bool isTemp, bool isRedo)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
/*
|
|
|
|
* Get rid of any leftover buffers for the rel (shouldn't be any in the
|
|
|
|
* commit case, but there can be in the abort case).
|
|
|
|
*/
|
|
|
|
DropRelFileNodeBuffers(rnode, isTemp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Tell the free space map to forget this relation. It won't be accessed
|
|
|
|
* any more anyway, but we may as well recycle the map space quickly.
|
|
|
|
*/
|
|
|
|
FreeSpaceMapForgetRel(&rnode);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* And delete the physical files.
|
|
|
|
*
|
|
|
|
* Note: we treat deletion failure as a WARNING, not an error,
|
|
|
|
* because we've already decided to commit or abort the current xact.
|
|
|
|
*/
|
|
|
|
if (! (*(smgrsw[which].smgr_unlink)) (rnode, isRedo))
|
|
|
|
ereport(WARNING,
|
|
|
|
(errcode_for_file_access(),
|
|
|
|
errmsg("could not unlink relation %u/%u: %m",
|
|
|
|
rnode.tblNode,
|
|
|
|
rnode.relNode)));
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2004-02-10 02:55:27 +01:00
|
|
|
* smgrextend() -- Add a new block to a file.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
2004-02-10 02:55:27 +01:00
|
|
|
* The semantics are basically the same as smgrwrite(): write at the
|
|
|
|
* specified position. However, we are expecting to extend the
|
|
|
|
* relation (ie, blocknum is the current EOF), and so in case of
|
|
|
|
* failure we clean up by truncating.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrextend(SMgrRelation reln, BlockNumber blocknum, char *buffer)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[reln->smgr_which].smgr_extend)) (reln, blocknum, buffer))
|
2003-07-25 00:04:15 +02:00
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
2004-02-10 02:55:27 +01:00
|
|
|
errmsg("could not extend relation %u/%u: %m",
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode),
|
|
|
|
errhint("Check free disk space.")));
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
1997-09-07 07:04:48 +02:00
|
|
|
* smgrread() -- read a particular block from a relation into the supplied
|
|
|
|
* buffer.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
* This routine is called from the buffer manager in order to
|
|
|
|
* instantiate pages in the shared buffer cache. All storage managers
|
2004-02-10 02:55:27 +01:00
|
|
|
* return pages in the format that POSTGRES expects.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrread(SMgrRelation reln, BlockNumber blocknum, char *buffer)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[reln->smgr_which].smgr_read)) (reln, blocknum, buffer))
|
2003-07-25 00:04:15 +02:00
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
2004-02-10 02:55:27 +01:00
|
|
|
errmsg("could not read block %u of relation %u/%u: %m",
|
|
|
|
blocknum,
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode)));
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
1997-09-07 07:04:48 +02:00
|
|
|
* smgrwrite() -- Write the supplied buffer out.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
2002-08-06 04:36:35 +02:00
|
|
|
* This is not a synchronous write -- the block is not necessarily
|
|
|
|
* on disk at return, only dumped out to the kernel.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
|
|
|
smgrwrite(SMgrRelation reln, BlockNumber blocknum, char *buffer)
|
2000-10-16 16:52:28 +02:00
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[reln->smgr_which].smgr_write)) (reln, blocknum, buffer))
|
2003-07-25 00:04:15 +02:00
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
2004-02-10 02:55:27 +01:00
|
|
|
errmsg("could not write block %u of relation %u/%u: %m",
|
|
|
|
blocknum,
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode)));
|
2000-10-16 16:52:28 +02:00
|
|
|
}
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
/*
|
2004-01-06 19:07:32 +01:00
|
|
|
* smgrnblocks() -- Calculate the number of blocks in the
|
1997-09-07 07:04:48 +02:00
|
|
|
* supplied relation.
|
1996-07-09 08:22:35 +02:00
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
* Returns the number of blocks on success, aborts the current
|
|
|
|
* transaction on failure.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2001-06-28 01:31:40 +02:00
|
|
|
BlockNumber
|
2004-02-10 02:55:27 +01:00
|
|
|
smgrnblocks(SMgrRelation reln)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
2001-10-25 07:50:21 +02:00
|
|
|
BlockNumber nblocks;
|
2001-06-29 23:08:25 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
nblocks = (*(smgrsw[reln->smgr_which].smgr_nblocks)) (reln);
|
2001-10-25 07:50:21 +02:00
|
|
|
|
2001-06-29 23:08:25 +02:00
|
|
|
/*
|
|
|
|
* NOTE: if a relation ever did grow to 2^32-1 blocks, this code would
|
|
|
|
* fail --- but that's a good thing, because it would stop us from
|
|
|
|
* extending the rel another block and having a block whose number
|
|
|
|
* actually is InvalidBlockNumber.
|
|
|
|
*/
|
|
|
|
if (nblocks == InvalidBlockNumber)
|
2003-07-25 00:04:15 +02:00
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
2004-02-10 02:55:27 +01:00
|
|
|
errmsg("could not count blocks of relation %u/%u: %m",
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode)));
|
2001-06-29 23:08:25 +02:00
|
|
|
|
|
|
|
return nblocks;
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
|
1996-11-27 08:25:52 +01:00
|
|
|
/*
|
2004-01-06 19:07:32 +01:00
|
|
|
* smgrtruncate() -- Truncate supplied relation to the specified number
|
|
|
|
* of blocks
|
1996-11-27 08:25:52 +01:00
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
* Returns the number of blocks on success, aborts the current
|
|
|
|
* transaction on failure.
|
1996-11-27 08:25:52 +01:00
|
|
|
*/
|
2001-06-28 01:31:40 +02:00
|
|
|
BlockNumber
|
2004-02-10 02:55:27 +01:00
|
|
|
smgrtruncate(SMgrRelation reln, BlockNumber nblocks)
|
1996-11-27 08:25:52 +01:00
|
|
|
{
|
2001-10-25 07:50:21 +02:00
|
|
|
BlockNumber newblks;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
2004-02-10 02:55:27 +01:00
|
|
|
/*
|
|
|
|
* Tell the free space map to forget anything it may have stored
|
|
|
|
* for the about-to-be-deleted blocks. We want to be sure it
|
|
|
|
* won't return bogus block numbers later on.
|
|
|
|
*/
|
|
|
|
FreeSpaceMapTruncateRel(&reln->smgr_rnode, nblocks);
|
|
|
|
|
|
|
|
newblks = (*(smgrsw[reln->smgr_which].smgr_truncate)) (reln, nblocks);
|
|
|
|
if (newblks == InvalidBlockNumber)
|
|
|
|
ereport(ERROR,
|
|
|
|
(errcode_for_file_access(),
|
|
|
|
errmsg("could not truncate relation %u/%u to %u blocks: %m",
|
|
|
|
reln->smgr_rnode.tblNode,
|
|
|
|
reln->smgr_rnode.relNode,
|
|
|
|
nblocks)));
|
1997-09-07 07:04:48 +02:00
|
|
|
|
1998-09-01 05:29:17 +02:00
|
|
|
return newblks;
|
1996-11-27 08:25:52 +01:00
|
|
|
}
|
|
|
|
|
2000-11-08 23:10:03 +01:00
|
|
|
/*
|
2004-01-06 19:07:32 +01:00
|
|
|
* smgrDoPendingDeletes() -- Take care of relation deletes at end of xact.
|
2000-11-08 23:10:03 +01:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
2000-11-08 23:10:03 +01:00
|
|
|
smgrDoPendingDeletes(bool isCommit)
|
|
|
|
{
|
|
|
|
while (pendingDeletes != NULL)
|
|
|
|
{
|
|
|
|
PendingRelDelete *pending = pendingDeletes;
|
|
|
|
|
|
|
|
pendingDeletes = pending->next;
|
|
|
|
if (pending->atCommit == isCommit)
|
2004-02-10 02:55:27 +01:00
|
|
|
smgr_internal_unlink(pending->relnode,
|
|
|
|
pending->which,
|
|
|
|
pending->isTemp,
|
|
|
|
false);
|
2000-11-08 23:10:03 +01:00
|
|
|
pfree(pending);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
/*
|
2002-08-06 04:36:35 +02:00
|
|
|
* smgrcommit() -- Prepare to commit changes made during the current
|
|
|
|
* transaction.
|
|
|
|
*
|
2004-01-06 19:07:32 +01:00
|
|
|
* This is called before we actually commit.
|
1996-07-09 08:22:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
2002-08-06 04:36:35 +02:00
|
|
|
smgrcommit(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
int i;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
for (i = 0; i < NSmgr; i++)
|
|
|
|
{
|
|
|
|
if (smgrsw[i].smgr_commit)
|
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[i].smgr_commit)) ())
|
2000-06-20 01:37:08 +02:00
|
|
|
elog(FATAL, "transaction commit failed on %s: %m",
|
2000-06-05 09:29:25 +02:00
|
|
|
DatumGetCString(DirectFunctionCall1(smgrout,
|
2001-03-22 05:01:46 +01:00
|
|
|
Int16GetDatum(i))));
|
1997-09-07 07:04:48 +02:00
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2002-08-06 04:36:35 +02:00
|
|
|
/*
|
|
|
|
* smgrabort() -- Abort changes made during the current transaction.
|
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
2002-08-06 04:36:35 +02:00
|
|
|
smgrabort(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
int i;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
for (i = 0; i < NSmgr; i++)
|
|
|
|
{
|
|
|
|
if (smgrsw[i].smgr_abort)
|
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[i].smgr_abort)) ())
|
2000-06-20 01:37:08 +02:00
|
|
|
elog(FATAL, "transaction abort failed on %s: %m",
|
2000-06-05 09:29:25 +02:00
|
|
|
DatumGetCString(DirectFunctionCall1(smgrout,
|
2001-03-22 05:01:46 +01:00
|
|
|
Int16GetDatum(i))));
|
1997-09-07 07:04:48 +02:00
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
}
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
2002-08-06 04:36:35 +02:00
|
|
|
/*
|
2004-01-06 19:07:32 +01:00
|
|
|
* smgrsync() -- Sync files to disk at checkpoint time.
|
2002-08-06 04:36:35 +02:00
|
|
|
*/
|
2004-02-10 02:55:27 +01:00
|
|
|
void
|
2002-08-06 04:36:35 +02:00
|
|
|
smgrsync(void)
|
2000-10-28 18:21:00 +02:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < NSmgr; i++)
|
|
|
|
{
|
|
|
|
if (smgrsw[i].smgr_sync)
|
|
|
|
{
|
2004-02-10 02:55:27 +01:00
|
|
|
if (! (*(smgrsw[i].smgr_sync)) ())
|
Commit to match discussed elog() changes. Only update is that LOG is
now just below FATAL in server_min_messages. Added more text to
highlight ordering difference between it and client_min_messages.
---------------------------------------------------------------------------
REALLYFATAL => PANIC
STOP => PANIC
New INFO level the prints to client by default
New LOG level the prints to server log by default
Cause VACUUM information to print only to the client
NOTICE => INFO where purely information messages are sent
DEBUG => LOG for purely server status messages
DEBUG removed, kept as backward compatible
DEBUG5, DEBUG4, DEBUG3, DEBUG2, DEBUG1 added
DebugLvl removed in favor of new DEBUG[1-5] symbols
New server_min_messages GUC parameter with values:
DEBUG[5-1], INFO, NOTICE, ERROR, LOG, FATAL, PANIC
New client_min_messages GUC parameter with values:
DEBUG[5-1], LOG, INFO, NOTICE, ERROR, FATAL, PANIC
Server startup now logged with LOG instead of DEBUG
Remove debug_level GUC parameter
elog() numbers now start at 10
Add test to print error message if older elog() values are passed to elog()
Bootstrap mode now has a -d that requires an argument, like postmaster
2002-03-02 22:39:36 +01:00
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elog(PANIC, "storage sync failed on %s: %m",
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2000-10-28 18:21:00 +02:00
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DatumGetCString(DirectFunctionCall1(smgrout,
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2001-03-22 05:01:46 +01:00
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Int16GetDatum(i))));
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2000-10-28 18:21:00 +02:00
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}
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}
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}
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2000-10-21 17:43:36 +02:00
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void
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smgr_redo(XLogRecPtr lsn, XLogRecord *record)
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{
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}
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void
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smgr_undo(XLogRecPtr lsn, XLogRecord *record)
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{
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}
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2001-03-22 05:01:46 +01:00
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2000-10-21 17:43:36 +02:00
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void
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2001-03-22 05:01:46 +01:00
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smgr_desc(char *buf, uint8 xl_info, char *rec)
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2000-10-21 17:43:36 +02:00
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{
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}
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