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postgresql/src/include/utils/flatfiles.h

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Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
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/*-------------------------------------------------------------------------
*
* flatfiles.h
* Routines for maintaining "flat file" images of the shared catalogs.
*
*
Standard pgindent run for 8.1.
2005-10-14 22:49:52 -04:00
* $PostgreSQL: pgsql/src/include/utils/flatfiles.h,v 1.6 2005/10/15 02:49:46 momjian Exp $
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
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*
*-------------------------------------------------------------------------
*/
#ifndef FLATFILES_H
#define FLATFILES_H
#include "fmgr.h"
extern void database_file_update_needed(void);
Replace pg_shadow and pg_group by new role-capable catalogs pg_authid and pg_auth_members. There are still many loose ends to finish in this patch (no documentation, no regression tests, no pg_dump support for instance). But I'm going to commit it now anyway so that Alvaro can make some progress on shared dependencies. The catalog changes should be pretty much done.
2005-06-28 01:09:14 -04:00
extern void auth_file_update_needed(void);
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
2005-02-19 21:22:07 -05:00
extern char *database_getflatfilename(void);
Replace pg_shadow and pg_group by new role-capable catalogs pg_authid and pg_auth_members. There are still many loose ends to finish in this patch (no documentation, no regression tests, no pg_dump support for instance). But I'm going to commit it now anyway so that Alvaro can make some progress on shared dependencies. The catalog changes should be pretty much done.
2005-06-28 01:09:14 -04:00
extern char *auth_getflatfilename(void);
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
2005-02-19 21:22:07 -05:00
extern void BuildFlatFiles(bool database_only);
Two-phase commit. Original patch by Heikki Linnakangas, with additional hacking by Alvaro Herrera and Tom Lane.
2005-06-17 18:32:51 -04:00
extern void AtPrepare_UpdateFlatFiles(void);
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
2005-02-19 21:22:07 -05:00
extern void AtEOXact_UpdateFlatFiles(bool isCommit);
extern void AtEOSubXact_UpdateFlatFiles(bool isCommit,
Standard pgindent run for 8.1.
2005-10-14 22:49:52 -04:00
SubTransactionId mySubid,
SubTransactionId parentSubid);
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
2005-02-19 21:22:07 -05:00
extern Datum flatfile_update_trigger(PG_FUNCTION_ARGS);
Two-phase commit. Original patch by Heikki Linnakangas, with additional hacking by Alvaro Herrera and Tom Lane.
2005-06-17 18:32:51 -04:00
extern void flatfile_twophase_postcommit(TransactionId xid, uint16 info,
Standard pgindent run for 8.1.
2005-10-14 22:49:52 -04:00
void *recdata, uint32 len);
Two-phase commit. Original patch by Heikki Linnakangas, with additional hacking by Alvaro Herrera and Tom Lane.
2005-06-17 18:32:51 -04:00
Add code to prevent transaction ID wraparound by enforcing a safe limit in GetNewTransactionId(). Since the limit value has to be computed before we run any real transactions, this requires adding code to database startup to scan pg_database and determine the oldest datfrozenxid. This can conveniently be combined with the first stage of an attack on the problem that the 'flat file' copies of pg_shadow and pg_group are not properly updated during WAL recovery. The code I've added to startup resides in a new file src/backend/utils/init/flatfiles.c, and it is responsible for rewriting the flat files as well as initializing the XID wraparound limit value. This will eventually allow us to get rid of GetRawDatabaseInfo too, but we'll need an initdb so we can add a trigger to pg_database.
2005-02-19 21:22:07 -05:00
#endif /* FLATFILES_H */
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