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 static NTSTATUS dbwrap_fallback_fetch(struct db_context *db,
33 TDB_DATA key, TDB_DATA *data)
35 struct db_record *rec;
37 rec = dbwrap_fetch_locked(db, mem_ctx, key);
39 return NT_STATUS_UNSUCCESSFUL;
42 data->dsize = rec->value.dsize;
43 data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
49 * Fall back using fetch if no genuine exists operation is provided
52 static int dbwrap_fallback_exists(struct db_context *db, TDB_DATA key)
54 int res = dbwrap_parse_record(db, key, NULL, NULL);
55 return ( res == -1) ? 0 : 1;
59 * Fall back using fetch if no genuine parse operation is provided
62 static int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
63 int (*parser)(TDB_DATA key,
72 status = dbwrap_fetch(db, talloc_tos(), key, &data);
73 if (!NT_STATUS_IS_OK(status)) {
77 res = parser(key, data, private_data);
78 TALLOC_FREE(data.dptr);
83 static int delete_record(struct db_record *rec, void *data)
85 NTSTATUS status = dbwrap_record_delete(rec);
86 return NT_STATUS_IS_OK(status) ? 0 : -1;
90 * Fallback wipe implementation using traverse and delete if no genuine
91 * wipe operation is provided
93 static int dbwrap_fallback_wipe(struct db_context *db)
95 NTSTATUS status = dbwrap_trans_traverse(db, delete_record, NULL);
96 return NT_STATUS_IS_OK(status) ? 0 : -1;
101 * Wrapper functions for the backend methods
104 TDB_DATA dbwrap_record_get_key(const struct db_record *rec)
109 TDB_DATA dbwrap_record_get_value(const struct db_record *rec)
114 NTSTATUS dbwrap_record_store(struct db_record *rec, TDB_DATA data, int flags)
116 return rec->store(rec, data, flags);
119 NTSTATUS dbwrap_record_delete(struct db_record *rec)
121 return rec->delete_rec(rec);
124 struct db_record *dbwrap_fetch_locked(struct db_context *db,
128 return db->fetch_locked(db, mem_ctx, key);
131 NTSTATUS dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
132 TDB_DATA key, TDB_DATA *value)
135 return NT_STATUS_INVALID_PARAMETER;
137 if (db->fetch == NULL) {
138 return dbwrap_fallback_fetch(db, mem_ctx, key, value);
140 return db->fetch(db, mem_ctx, key, value);
143 bool dbwrap_exists(struct db_context *db, TDB_DATA key)
146 if (db->exists != NULL) {
147 result = db->exists(db, key);
149 result = dbwrap_fallback_exists(db,key);
151 return (result == 1);
154 NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
155 TDB_DATA data, int flags)
157 struct db_record *rec;
160 rec = dbwrap_fetch_locked(db, talloc_tos(), key);
162 return NT_STATUS_NO_MEMORY;
165 status = dbwrap_record_store(rec, data, flags);
170 NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
172 struct db_record *rec;
175 rec = dbwrap_fetch_locked(db, talloc_tos(), key);
177 return NT_STATUS_NO_MEMORY;
179 status = dbwrap_record_delete(rec);
184 NTSTATUS dbwrap_traverse(struct db_context *db,
185 int (*f)(struct db_record*, void*),
189 int ret = db->traverse(db, f, private_data);
192 return NT_STATUS_INTERNAL_DB_CORRUPTION;
202 NTSTATUS dbwrap_traverse_read(struct db_context *db,
203 int (*f)(struct db_record*, void*),
207 int ret = db->traverse_read(db, f, private_data);
210 return NT_STATUS_INTERNAL_DB_CORRUPTION;
220 static int dbwrap_null_parser(TDB_DATA key, TDB_DATA val, void* data)
225 int dbwrap_parse_record(struct db_context *db, TDB_DATA key,
226 int (*parser)(TDB_DATA key, TDB_DATA data,
230 if (parser == NULL) {
231 parser = dbwrap_null_parser;
234 if (db->parse_record == NULL) {
235 return dbwrap_fallback_parse_record(db, key, parser,
238 return db->parse_record(db, key, parser, private_data);
241 int dbwrap_wipe(struct db_context *db)
243 if (db->wipe == NULL) {
244 return dbwrap_fallback_wipe(db);
249 int dbwrap_get_seqnum(struct db_context *db)
251 return db->get_seqnum(db);
254 int dbwrap_get_flags(struct db_context *db)
256 return db->get_flags(db);
259 int dbwrap_transaction_start(struct db_context *db)
261 return db->transaction_start(db);
264 int dbwrap_transaction_commit(struct db_context *db)
266 return db->transaction_commit(db);
269 int dbwrap_transaction_cancel(struct db_context *db)
271 return db->transaction_cancel(db);