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samba-mirror/source3/tdb/tdb.h

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first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
/*
Unix SMB/Netbios implementation.
Version 3.0
Samba database functions
Copyright (C) Andrew Tridgell 1999
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
typedef unsigned tdb_len;
typedef unsigned tdb_off;
- patch from Rusty to neaten up the code a bit - fixed a race condition in tdb_open() (This used to be commit 21d4882f64a65ee1786231eb55b7768bb44921fd)
2000-01-07 06:01:55 +03:00
#define TDB_MAGIC_FOOD "TDB file\n"
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
/* this is stored at the front of every database */
struct tdb_header {
- patch from Rusty to neaten up the code a bit - fixed a race condition in tdb_open() (This used to be commit 21d4882f64a65ee1786231eb55b7768bb44921fd)
2000-01-07 06:01:55 +03:00
char magic_food[32]; /* for /etc/magic */
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
unsigned version; /* version of the code */
unsigned hash_size; /* number of hash entries */
};
typedef struct {
char *dptr;
size_t dsize;
} TDB_DATA;
/* this is the context structure that is returned from a db open */
typedef struct {
char *name; /* the name of the database */
void *map_ptr; /* where it is currently mapped */
int fd; /* open file descriptor for the database */
tdb_len map_size; /* how much space has been mapped */
first cut at using the tdb code for the connections structure, the SWAT status page and smbstatus. It made the code _much_ simpler, I wish we'd done a database module a long time ago! (This used to be commit 4951755413c11d4c5b9af4699a6e622056d52433)
1999-12-21 07:54:30 +03:00
int read_only; /* opened read-only */
fixed locking code (This used to be commit 1f5dc924044fb54b10ac8884d4df1e15902de8be)
1999-12-23 04:14:20 +03:00
int *locked; /* set if we have a chain locked */
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
struct tdb_header header; /* a cached copy of the header */
} TDB_CONTEXT;
- added tdb_flags option to tdb_open() - added TDB_CLEAR_IF_FIRST flag to clear the database if this is the first attached process. Useful for non-persistent databases like our locking area (this will also make upgrades to new database layouts easier) - use lock_path() in a couple of places - leave connections database open while smbd running - cleaned up some tdb code a little, using macros for constants (This used to be commit 00e9da3ca577527db392aced62f02c69cfee8f4f)
2000-01-03 02:00:27 +03:00
/* flags to tdb_store() */
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
#define TDB_REPLACE 1
#define TDB_INSERT 2
- added tdb_flags option to tdb_open() - added TDB_CLEAR_IF_FIRST flag to clear the database if this is the first attached process. Useful for non-persistent databases like our locking area (this will also make upgrades to new database layouts easier) - use lock_path() in a couple of places - leave connections database open while smbd running - cleaned up some tdb code a little, using macros for constants (This used to be commit 00e9da3ca577527db392aced62f02c69cfee8f4f)
2000-01-03 02:00:27 +03:00
/* flags for tdb_open() */
#define TDB_CLEAR_IF_FIRST 1
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
#if STANDALONE
- added tdb_flags option to tdb_open() - added TDB_CLEAR_IF_FIRST flag to clear the database if this is the first attached process. Useful for non-persistent databases like our locking area (this will also make upgrades to new database layouts easier) - use lock_path() in a couple of places - leave connections database open while smbd running - cleaned up some tdb code a little, using macros for constants (This used to be commit 00e9da3ca577527db392aced62f02c69cfee8f4f)
2000-01-03 02:00:27 +03:00
TDB_CONTEXT *tdb_open(char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode);
first pass at the database code for Samba. This also includes a test suite and a very simple tool for manuipulating the databases. the main code is in tdb/tdb.c and includes both mmap and file based IO. All databases auto-expand and allow multiple simultaneous writers. the next step is using this new capability in lots of places in Samba where we have existing ad-hoc databases (This used to be commit c89d29cc5e3b6d568928acace01144059f1668b3)
1999-12-21 06:04:37 +03:00
int tdb_writelock(TDB_CONTEXT *tdb);
int tdb_writeunlock(TDB_CONTEXT *tdb);
TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
int tdb_close(TDB_CONTEXT *tdb);
TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_traverse(TDB_CONTEXT *tdb, int (*fn)(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf));
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
#endif
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