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samba-mirror/source3/include/dbwrap.h

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r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
/*
Unix SMB/CIFS implementation.
Database interface wrapper around tdb
Copyright (C) Volker Lendecke 2005-2007
s3: Fix some nonempty blank lines
2010-03-14 16:06:45 +03:00
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
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
r23779: Change from v2 or later to v3 or later. Jeremy. (This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
2007-07-09 23:25:36 +04:00
the Free Software Foundation; either version 3 of the License, or
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
(at your option) any later version.
s3: Fix some nonempty blank lines
2010-03-14 16:06:45 +03:00
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
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.
s3: Fix some nonempty blank lines
2010-03-14 16:06:45 +03:00
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
You should have received a copy of the GNU General Public License
r23784: use the GPLv3 boilerplate as recommended by the FSF and the license text (This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
2007-07-10 04:52:41 +04:00
along with this program. If not, see <http://www.gnu.org/licenses/>.
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
*/
Cosmetic fix (This used to be commit 8d8cb8f9ccbc013b97c252d27c3af4e2eb10d56a)
2007-11-07 22:18:38 +03:00
#ifndef __DBWRAP_H__
#define __DBWRAP_H__
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
s3: only include tdb headers where needed. Guenther
2011-05-05 13:25:29 +04:00
#include <tdb.h>
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
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,
Fix a confusing variable name (This used to be commit 32c992e9573c9af34cd142393287e2f3538d2dd9)
2008-03-28 14:05:54 +03:00
int (*f)(struct db_record *rec,
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
void *private_data),
void *private_data);
r23220: Add traverse_read to dbwrap (This used to be commit b38dc5ffdfe9fdc2879c57dc181815f06b4747fe)
2007-05-29 22:04:38 +04:00
int (*traverse_read)(struct db_context *db,
Fix a confusing variable name (This used to be commit 32c992e9573c9af34cd142393287e2f3538d2dd9)
2008-03-28 14:05:54 +03:00
int (*f)(struct db_record *rec,
r23220: Add traverse_read to dbwrap (This used to be commit b38dc5ffdfe9fdc2879c57dc181815f06b4747fe)
2007-05-29 22:04:38 +04:00
void *private_data),
void *private_data);
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
int (*get_seqnum)(struct db_context *db);
s3:dbwrap: add get_flags() hook to db_context metze
2008-12-17 10:35:35 +03:00
int (*get_flags)(struct db_context *db);
Add transactions to the dbwrap API Only filled in for tdb so far, for rbt it's pointless, and ctdb itself needs to be extended (This used to be commit 0a55e018dd68af06d84332d54148bbfb0b510b22)
2008-03-10 12:17:05 +03:00
int (*transaction_start)(struct db_context *db);
int (*transaction_commit)(struct db_context *db);
int (*transaction_cancel)(struct db_context *db);
Add dbwrap->parse_record Signed-off-by: Michael Adam <obnox@samba.org>
2009-02-22 02:18:05 +03:00
int (*parse_record)(struct db_context *db, TDB_DATA key,
int (*parser)(TDB_DATA key, TDB_DATA data,
void *private_data),
void *private_data);
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
void *private_data;
Merge CTDB-related fixes from samba-ctdb 3.0 branch (http://samba.org/~tridge/3_0-ctdb) Signed-off-by: Alexander Bokovoy <ab@samba.org>(This used to be commit 0c8e23afbbb2d081fc23908bafcad04650bfacea)
2008-01-16 12:09:48 +03:00
bool persistent;
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
};
Fix bug #6195 - Migrating from 3.0.x to 3.3.x can fail to update passdb.tdb correctly. For the clustering case. Clustered setups should have only ever used the unsigned version of TDB_DATA in the first place so they can't be in this mess :-). Just do the normal upgrade in the clustered case. Jeremy.
2009-03-27 22:12:30 +03:00
bool db_is_local(const char *name);
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
struct db_context *db_open(TALLOC_CTX *mem_ctx,
const char *name,
int hash_size, int tdb_flags,
int open_flags, mode_t mode);
build: don't autogenerate prototypes for util_tdb and dbwrap anymore. Stick to hand-written headers (that are there anyways). Add some missing prototypes to util_tdb.h and dbwrap.h. I did not bother to add a header for each single dbwrap backend open function but put the prototypes for the open functions into the central dbwrap.h. Michael (This used to be commit edf4dbed27a3c63c04e8110e75cdb76e31627eb6)
2008-03-25 14:54:14 +03:00
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);
dbwrap: add dbwrap_tdb2 backend This backend can be used untill ctdb knows about real transactions. It stores a master tdb in a shared location and a readonly copy on the local harddisk. Reads are always on the local tdb and writes always on both. Change notify messages are send to all message context, which ask for them. With the notifies it's possible to just update the changed records, instead of copying all records (which is the fallback). You need to configure: dbwrap:use_tdb2=yes dbwrap_tdb2:master directory=/some/shared/path dbwrap_tdb2:local directory=/var/lib/samba metze (This used to be commit aa6230de0d5f1875aa8c12c4fc017d3a40f90890)
2008-03-19 21:40:10 +03:00
struct messaging_context;
build: don't autogenerate prototypes for util_tdb and dbwrap anymore. Stick to hand-written headers (that are there anyways). Add some missing prototypes to util_tdb.h and dbwrap.h. I did not bother to add a header for each single dbwrap backend open function but put the prototypes for the open functions into the central dbwrap.h. Michael (This used to be commit edf4dbed27a3c63c04e8110e75cdb76e31627eb6)
2008-03-25 14:54:14 +03:00
#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);
s3:dbwrap: add dbwrap_delete(), dbwrap_store() and dbwrap_fetch() The _bystring function are now just tiny wrappers. metze
2008-12-17 10:53:31 +03:00
NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
TDB_DATA data, int flags);
TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key);
Add dbwrap bystring service routines (This used to be commit 1e214b536b0628db299d701839e62a4ac52727c9)
2007-11-24 21:56:16 +03:00
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);
r22775: For the cluster code I've developed a wrapper around tdb to put different database backends in place dynamically. The main abstractions are db_context and db_record, it should be mainly self-describing, see include/dbwrap.h. You open the db just as you would open a tdb, this time with db_open(). If you want to fetch a record, just do the db->fetch() call, if you want to do operations on it, you need to get it with fetch_locked(). I added dbwrap_file.c (not heavily tested lately) as an example for what can be done with that abstraction, uses a file per key. So if anybody is willing to shape that up, we might have a chance on reiserfs again.... :-) This abstraction works fine for brlock.tdb, locking.tdb, connections.tdb and sessionid.tdb. It should work fine for the others as well, I just did not yet get around to convert them. If nobody loudly screams NO, then I will import the code that uses this soon. Volker (This used to be commit e9d7484ca246cfca4a1fd23be35edc2783136ebe)
2007-05-10 14:42:13 +04:00
s3-build: use dbwrap.h only where needed. Guenther
2010-08-18 20:59:23 +04:00
/* The following definitions come from lib/dbwrap_util.c */
int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr);
int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v);
bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
uint32_t *val);
int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v);
NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
uint32_t *oldval, uint32_t change_val);
NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
const char *keystr,
uint32_t *oldval,
uint32_t change_val);
NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
int32_t *oldval, int32_t change_val);
NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
const char *keystr,
int32_t *oldval,
int32_t change_val);
NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
int flag);
NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
int32_t v);
NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
uint32_t v);
NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
TDB_DATA data, int flags);
NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key);
NTSTATUS dbwrap_trans_do(struct db_context *db,
NTSTATUS (*action)(struct db_context *, void *),
void *private_data);
s3: add function dbwrap_trans_traverse
2011-03-16 11:13:40 +03:00
NTSTATUS dbwrap_trans_traverse(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data);
s3: add function dbwrap_traverse
2011-03-18 16:39:15 +03:00
NTSTATUS dbwrap_traverse(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data);
s3-build: use dbwrap.h only where needed. Guenther
2010-08-18 20:59:23 +04:00
NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key);
NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
TDB_DATA data, int flags);
TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
const char *key);
Cosmetic fix (This used to be commit 8d8cb8f9ccbc013b97c252d27c3af4e2eb10d56a)
2007-11-07 22:18:38 +03:00
#endif /* __DBWRAP_H__ */
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