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07d1edb954
This allows loadable modules to get control at drop time, perhaps for the purpose of performing additional security checks or to log the event. The initial purpose of this code is to support sepgsql, but other applications should be possible as well. KaiGai Kohei, reviewed by me.
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
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* objectaccess.h
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*
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* Object access hooks.
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*
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* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*/
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#ifndef OBJECTACCESS_H
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#define OBJECTACCESS_H
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/*
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* Object access hooks are intended to be called just before or just after
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* performing certain actions on a SQL object. This is intended as
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* infrastructure for security or logging pluggins.
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*
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* OAT_POST_CREATE should be invoked just after the the object is created.
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* Typically, this is done after inserting the primary catalog records and
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* associated dependencies.
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*
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* OAT_DROP should be invoked just before deletion of objects; typically
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* deleteOneObject(). Its arguments are packed within ObjectAccessDrop.
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*
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* Other types may be added in the future.
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*/
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typedef enum ObjectAccessType
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{
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OAT_POST_CREATE,
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OAT_DROP,
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} ObjectAccessType;
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/*
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* Arguments of OAT_DROP event
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*/
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typedef struct
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{
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/*
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* Flags to inform extensions the context of this deletion.
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* Also see PERFORM_DELETION_* in dependency.h
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*/
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int dropflags;
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} ObjectAccessDrop;
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/*
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* Hook, and a macro to invoke it.
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*/
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typedef void (*object_access_hook_type) (ObjectAccessType access,
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Oid classId,
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Oid objectId,
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int subId,
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void *arg);
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extern PGDLLIMPORT object_access_hook_type object_access_hook;
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#define InvokeObjectAccessHook(access,classId,objectId,subId,arg) \
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do { \
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if (object_access_hook) \
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(*object_access_hook)((access),(classId), \
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(objectId),(subId),(arg)); \
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} while(0)
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#endif /* OBJECTACCESS_H */
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