samba-mirror/source3/include/dbwrap.h

/* 
   Unix SMB/CIFS implementation.
   Database interface wrapper around tdb
   Copyright (C) Volker Lendecke 2005-2007
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __DBWRAP_H__
#define __DBWRAP_H__

struct db_record {
	TDB_DATA key, value;
	NTSTATUS (*store)(struct db_record *rec, TDB_DATA data, int flag);
	NTSTATUS (*delete_rec)(struct db_record *rec);
	void *private_data;
};

struct db_context {
	struct db_record *(*fetch_locked)(struct db_context *db,
					  TALLOC_CTX *mem_ctx,
					  TDB_DATA key);
	int (*fetch)(struct db_context *db, TALLOC_CTX *mem_ctx,
		     TDB_DATA key, TDB_DATA *data);
	int (*traverse)(struct db_context *db,
			int (*f)(struct db_record *rec,
				 void *private_data),
			void *private_data);
	int (*traverse_read)(struct db_context *db,
			     int (*f)(struct db_record *rec,
				      void *private_data),
			     void *private_data);
	int (*get_seqnum)(struct db_context *db);
	int (*transaction_start)(struct db_context *db);
	int (*transaction_commit)(struct db_context *db);
	int (*transaction_cancel)(struct db_context *db);
	void *private_data;
	bool persistent;
};

struct db_context *db_open(TALLOC_CTX *mem_ctx,
			   const char *name,
			   int hash_size, int tdb_flags,
			   int open_flags, mode_t mode);

struct db_context *db_open_trans(TALLOC_CTX *mem_ctx,
				 const char *name,
				 int hash_size, int tdb_flags,
				 int open_flags, mode_t mode);

struct db_context *db_open_rbt(TALLOC_CTX *mem_ctx);

struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
			       const char *name,
			       int hash_size, int tdb_flags,
			       int open_flags, mode_t mode);

struct db_context *db_open_tdb2(TALLOC_CTX *mem_ctx,
			        const char *name,
			        int hash_size, int tdb_flags,
			        int open_flags, mode_t mode);

struct messaging_context;
void db_tdb2_setup_messaging(struct messaging_context *msg_ctx, bool server);

#ifdef CLUSTER_SUPPORT
struct db_context *db_open_ctdb(TALLOC_CTX *mem_ctx,
				const char *name,
				int hash_size, int tdb_flags,
				int open_flags, mode_t mode);
#endif

struct db_context *db_open_file(TALLOC_CTX *mem_ctx,
				struct messaging_context *msg_ctx,
				const char *name,
				int hash_size, int tdb_flags,
				int open_flags, mode_t mode);


NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key);
NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
			       TDB_DATA data, int flags);
TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
			       const char *key);

#endif /* __DBWRAP_H__ */