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/*
Unix SMB/CIFS implementation.
Compatibility layer for TDB1 vs TDB2.
Copyright (C) Rusty Russell 2011
** NOTE! The following LGPL license applies to the tdb_compat
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TDB_COMPAT_H
#define TDB_COMPAT_H
#include "replace.h"
#include <ccan/typesafe_cb/typesafe_cb.h>
#if BUILD_TDB2
#include <tdb2.h>
#include <fcntl.h>
#include <unistd.h>
extern TDB_DATA tdb_null;
/* Old-style tdb_fetch. */
static inline TDB_DATA tdb_fetch_compat(struct tdb_context *tdb, TDB_DATA k)
{
TDB_DATA dbuf;
if (tdb_fetch(tdb, k, &dbuf) != TDB_SUCCESS) {
return tdb_null;
}
return dbuf;
}
static inline TDB_DATA tdb_firstkey_compat(struct tdb_context *tdb)
{
TDB_DATA k;
if (tdb_firstkey(tdb, &k) != TDB_SUCCESS) {
return tdb_null;
}
return k;
}
/* Note: this frees the old key.dptr. */
static inline TDB_DATA tdb_nextkey_compat(struct tdb_context *tdb, TDB_DATA k)
{
if (tdb_nextkey(tdb, &k) != TDB_SUCCESS) {
return tdb_null;
}
return k;
}
/* tdb_traverse_read and tdb_traverse are equal: both only take read locks. */
#define tdb_traverse_read tdb_traverse
/* Old-style tdb_errorstr */
#define tdb_errorstr_compat(tdb) tdb_errorstr(tdb_error(tdb))
/* This typedef doesn't exist in TDB2. */
typedef struct tdb_context TDB_CONTEXT;
/* We don't need these any more. */
#define tdb_reopen_all(flag) 0
#define tdb_reopen(tdb) 0
/* These no longer exist in tdb2. */
#define TDB_CLEAR_IF_FIRST 1048576
#define TDB_INCOMPATIBLE_HASH 0
#define TDB_VOLATILE 0
/* tdb2 does nonblocking functions via attibutes. */
enum TDB_ERROR tdb_transaction_start_nonblock(struct tdb_context *tdb);
/* Convenient (typesafe) wrapper for tdb open with logging */
#define tdb_open_compat(name, hsize, tdb_fl, open_fl, mode, log_fn, log_data) \
tdb_open_compat_((name), (hsize), (tdb_fl), (open_fl), (mode), \
typesafe_cb_preargs(void, void *, \
(log_fn), (log_data), \
struct tdb_context *, \
enum tdb_log_level, \
const char *), \
(log_data))
struct tdb_context *
tdb_open_compat_(const char *name, int hash_size_unused,
int tdb_flags, int open_flags, mode_t mode,
void (*log_fn)(struct tdb_context *,
enum tdb_log_level,
const char *message,
void *data),
void *log_data);
#else
#include <tdb.h>
/* FIXME: Inlining this is a bit lazy, but eases S3 build. */
static inline struct tdb_context *
tdb_open_compat(const char *name, int hash_size,
int tdb_flags, int open_flags, mode_t mode,
tdb_log_func log_fn, void *log_private)
{
struct tdb_logging_context lctx;
lctx.log_fn = log_fn;
lctx.log_private = log_private;
if (log_fn)
return tdb_open_ex(name, hash_size, tdb_flags, open_flags,
mode, &lctx, NULL);
else
return tdb_open(name, hash_size, tdb_flags, open_flags, mode);
}
#define tdb_firstkey_compat tdb_firstkey
/* Note: this frees the old key.dptr. */
static inline TDB_DATA tdb_nextkey_compat(struct tdb_context *tdb, TDB_DATA k)
{
TDB_DATA next = tdb_nextkey(tdb, k);
free(k.dptr);
return next;
}
#define tdb_errorstr_compat(tdb) tdb_errorstr(tdb)
#define tdb_fetch_compat tdb_fetch
#endif
#endif /* TDB_COMPAT_H */
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