2 Unix SMB/CIFS implementation.
3 Database interface wrapper
4 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
6 Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "dbwrap/dbwrap.h"
24 #include "dbwrap/dbwrap_private.h"
28 * Fall back using fetch_locked if no genuine fetch operation is provided
31 int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
32 TDB_DATA key, TDB_DATA *data)
34 struct db_record *rec;
36 if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
40 data->dsize = rec->value.dsize;
41 data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
47 * Fall back using fetch if no genuine exists operation is provided
50 static int dbwrap_fallback_exists(struct db_context *db, TDB_DATA key)
52 int res = dbwrap_parse_record(db, key, NULL, NULL);
53 return ( res == -1) ? 0 : 1;
57 * Fall back using fetch if no genuine parse operation is provided
60 int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
61 int (*parser)(TDB_DATA key,
69 res = db->fetch(db, talloc_tos(), key, &data);
74 res = parser(key, data, private_data);
75 TALLOC_FREE(data.dptr);
80 static int delete_record(struct db_record *rec, void *data)
82 NTSTATUS status = rec->delete_rec(rec);
83 return NT_STATUS_IS_OK(status) ? 0 : -1;
87 * Fallback wipe ipmlementation using traverse and delete if no genuine
88 * wipe operation is provided
90 int dbwrap_fallback_wipe(struct db_context *db)
92 NTSTATUS status = dbwrap_trans_traverse(db, &delete_record, NULL);
93 return NT_STATUS_IS_OK(status) ? 0 : -1;
98 * Wrapper functions for the backend methods
101 TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
106 if (db->fetch(db, mem_ctx, key, &result) != 0) {
107 return make_tdb_data(NULL, 0);
113 bool dbwrap_exists(struct db_context *db, TDB_DATA key)
116 if (db->exists != NULL) {
117 result = db->exists(db, key);
119 result = dbwrap_fallback_exists(db,key);
121 return (result == 1);
124 NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
125 TDB_DATA data, int flags)
127 struct db_record *rec;
130 rec = db->fetch_locked(db, talloc_tos(), key);
132 return NT_STATUS_NO_MEMORY;
135 status = rec->store(rec, data, flags);
140 NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
142 struct db_record *rec;
145 rec = db->fetch_locked(db, talloc_tos(), key);
147 return NT_STATUS_NO_MEMORY;
149 status = rec->delete_rec(rec);
154 NTSTATUS dbwrap_traverse(struct db_context *db,
155 int (*f)(struct db_record*, void*),
159 int ret = db->traverse(db, f, private_data);
162 return NT_STATUS_INTERNAL_DB_CORRUPTION;
172 NTSTATUS dbwrap_traverse_read(struct db_context *db,
173 int (*f)(struct db_record*, void*),
177 int ret = db->traverse_read(db, f, private_data);
180 return NT_STATUS_INTERNAL_DB_CORRUPTION;
190 static int dbwrap_null_parser(TDB_DATA key, TDB_DATA val, void* data)
195 int dbwrap_parse_record(struct db_context *db, TDB_DATA key,
196 int (*parser)(TDB_DATA key, TDB_DATA data,
200 if (parser == NULL) {
201 parser = dbwrap_null_parser;
204 if (db->parse_record) {
205 return db->parse_record(db, key, parser, private_data);
207 return dbwrap_fallback_parse_record(db, key, parser, private_data);
211 int dbwrap_wipe(struct db_context *db)
216 int dbwrap_get_flags(struct db_context *db)
218 return db->get_flags(db);
221 int dbwrap_transaction_start(struct db_context *db)
223 return db->transaction_start(db);
226 int dbwrap_transaction_commit(struct db_context *db)
228 return db->transaction_commit(db);
231 int dbwrap_transaction_cancel(struct db_context *db)
233 return db->transaction_cancel(db);