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/*
Unix SMB/CIFS implementation.
Database interface wrapper
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
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/>.
*/
#include "includes.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_private.h"
#include "util_tdb.h"
/*
* Fall back using fetch_locked if no genuine fetch operation is provided
*/
int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key, TDB_DATA *data)
{
struct db_record *rec;
if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
return -1;
}
data->dsize = rec->value.dsize;
data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
TALLOC_FREE(rec);
return 0;
}
/*
* Fall back using fetch if no genuine exists operation is provided
*/
static int dbwrap_fallback_exists(struct db_context *db, TDB_DATA key)
{
int res = dbwrap_parse_record(db, key, NULL, NULL);
return ( res == -1) ? 0 : 1;
}
/*
* Fall back using fetch if no genuine parse operation is provided
*/
int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
int (*parser)(TDB_DATA key,
TDB_DATA data,
void *private_data),
void *private_data)
{
TDB_DATA data;
int res;
res = db->fetch(db, talloc_tos(), key, &data);
if (res != 0) {
return -1;
}
res = parser(key, data, private_data);
TALLOC_FREE(data.dptr);
return res;
}
TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key)
{
TDB_DATA result;
if (db->fetch(db, mem_ctx, key, &result) != 0) {
return make_tdb_data(NULL, 0);
}
return result;
}
bool dbwrap_exists(struct db_context *db, TDB_DATA key)
{
int result;
if (db->exists != NULL) {
result = db->exists(db, key);
} else {
result = dbwrap_fallback_exists(db,key);
}
return (result == 1);
}
NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
TDB_DATA data, int flags)
{
struct db_record *rec;
NTSTATUS status;
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = rec->store(rec, data, flags);
TALLOC_FREE(rec);
return status;
}
NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
{
struct db_record *rec;
NTSTATUS status;
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = rec->delete_rec(rec);
TALLOC_FREE(rec);
return status;
}
NTSTATUS dbwrap_traverse(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data,
int *count)
{
int ret = db->traverse(db, f, private_data);
if (ret < 0) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
if (count != NULL) {
*count = ret;
}
return NT_STATUS_OK;
}
NTSTATUS dbwrap_traverse_read(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data,
int *count)
{
int ret = db->traverse_read(db, f, private_data);
if (ret < 0) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
if (count != NULL) {
*count = ret;
}
return NT_STATUS_OK;
}
static int dbwrap_null_parser(TDB_DATA key, TDB_DATA val, void* data)
{
return 0;
}
int dbwrap_parse_record(struct db_context *db, TDB_DATA key,
int (*parser)(TDB_DATA key, TDB_DATA data,
void *private_data),
void *private_data)
{
if (parser == NULL) {
parser = dbwrap_null_parser;
}
if (db->parse_record) {
return db->parse_record(db, key, parser, private_data);
} else {
return dbwrap_fallback_parse_record(db, key, parser, private_data);
}
}
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