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 NTSTATUS dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
32 TDB_DATA key, TDB_DATA *data)
34 struct db_record *rec;
36 rec = db->fetch_locked(db, mem_ctx, key);
38 return NT_STATUS_UNSUCCESSFUL;
41 data->dsize = rec->value.dsize;
42 data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
48 * Fall back using fetch if no genuine exists operation is provided
51 static int dbwrap_fallback_exists(struct db_context *db, TDB_DATA key)
53 int res = dbwrap_parse_record(db, key, NULL, NULL);
54 return ( res == -1) ? 0 : 1;
58 * Fall back using fetch if no genuine parse operation is provided
61 int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
62 int (*parser)(TDB_DATA key,
71 status = db->fetch(db, talloc_tos(), key, &data);
72 if (!NT_STATUS_IS_OK(status)) {
76 res = parser(key, data, private_data);
77 TALLOC_FREE(data.dptr);
82 static int delete_record(struct db_record *rec, void *data)
84 NTSTATUS status = rec->delete_rec(rec);
85 return NT_STATUS_IS_OK(status) ? 0 : -1;
89 * Fallback wipe ipmlementation using traverse and delete if no genuine
90 * wipe operation is provided
92 int dbwrap_fallback_wipe(struct db_context *db)
94 NTSTATUS status = dbwrap_trans_traverse(db, &delete_record, NULL);
95 return NT_STATUS_IS_OK(status) ? 0 : -1;
100 * Wrapper functions for the backend methods
103 TDB_DATA dbwrap_record_get_key(const struct db_record *rec)
108 TDB_DATA dbwrap_record_get_value(const struct db_record *rec)
113 NTSTATUS dbwrap_record_store(struct db_record *rec, TDB_DATA data, int flags)
115 return rec->store(rec, data, flags);
118 NTSTATUS dbwrap_record_delete(struct db_record *rec)
120 return rec->delete_rec(rec);
123 struct db_record *dbwrap_fetch_locked(struct db_context *db,
127 return db->fetch_locked(db, mem_ctx, key);
130 NTSTATUS dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
131 TDB_DATA key, TDB_DATA *value)
134 return NT_STATUS_INVALID_PARAMETER;
137 return db->fetch(db, mem_ctx, key, value);
140 bool dbwrap_exists(struct db_context *db, TDB_DATA key)
143 if (db->exists != NULL) {
144 result = db->exists(db, key);
146 result = dbwrap_fallback_exists(db,key);
148 return (result == 1);
151 NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
152 TDB_DATA data, int flags)
154 struct db_record *rec;
157 rec = db->fetch_locked(db, talloc_tos(), key);
159 return NT_STATUS_NO_MEMORY;
162 status = rec->store(rec, data, flags);
167 NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
169 struct db_record *rec;
172 rec = db->fetch_locked(db, talloc_tos(), key);
174 return NT_STATUS_NO_MEMORY;
176 status = rec->delete_rec(rec);
181 NTSTATUS dbwrap_traverse(struct db_context *db,
182 int (*f)(struct db_record*, void*),
186 int ret = db->traverse(db, f, private_data);
189 return NT_STATUS_INTERNAL_DB_CORRUPTION;
199 NTSTATUS dbwrap_traverse_read(struct db_context *db,
200 int (*f)(struct db_record*, void*),
204 int ret = db->traverse_read(db, f, private_data);
207 return NT_STATUS_INTERNAL_DB_CORRUPTION;
217 static int dbwrap_null_parser(TDB_DATA key, TDB_DATA val, void* data)
222 int dbwrap_parse_record(struct db_context *db, TDB_DATA key,
223 int (*parser)(TDB_DATA key, TDB_DATA data,
227 if (parser == NULL) {
228 parser = dbwrap_null_parser;
231 if (db->parse_record) {
232 return db->parse_record(db, key, parser, private_data);
234 return dbwrap_fallback_parse_record(db, key, parser, private_data);
238 int dbwrap_wipe(struct db_context *db)
243 int dbwrap_get_seqnum(struct db_context *db)
245 return db->get_seqnum(db);
248 int dbwrap_get_flags(struct db_context *db)
250 return db->get_flags(db);
253 int dbwrap_transaction_start(struct db_context *db)
255 return db->transaction_start(db);
258 int dbwrap_transaction_commit(struct db_context *db)
260 return db->transaction_commit(db);
263 int dbwrap_transaction_cancel(struct db_context *db)
265 return db->transaction_cancel(db);