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 if no genuine exists operation is provided
31 static int dbwrap_fallback_exists(struct db_context *db, TDB_DATA key)
33 NTSTATUS status = dbwrap_parse_record(db, key, NULL, NULL);
34 return NT_STATUS_IS_OK(status) ? 1 : 0;
38 * Fall back using fetch if no genuine parse operation is provided
41 static NTSTATUS dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
42 void (*parser)(TDB_DATA key,
47 struct db_record *rec;
50 rec = dbwrap_fetch_locked(db, talloc_tos(), key);
52 return NT_STATUS_NOT_FOUND;
54 data = dbwrap_record_get_value(rec);
56 data.dptr = talloc_memdup(talloc_tos(), data.dptr, data.dsize);
58 if (data.dptr == NULL) {
59 return NT_STATUS_NO_MEMORY;
62 parser(key, data, private_data);
64 TALLOC_FREE(data.dptr);
69 static int delete_record(struct db_record *rec, void *data)
71 NTSTATUS status = dbwrap_record_delete(rec);
72 return NT_STATUS_IS_OK(status) ? 0 : -1;
76 * Fallback wipe implementation using traverse and delete if no genuine
77 * wipe operation is provided
79 static int dbwrap_fallback_wipe(struct db_context *db)
81 NTSTATUS status = dbwrap_trans_traverse(db, delete_record, NULL);
82 return NT_STATUS_IS_OK(status) ? 0 : -1;
87 * Wrapper functions for the backend methods
90 TDB_DATA dbwrap_record_get_key(const struct db_record *rec)
95 TDB_DATA dbwrap_record_get_value(const struct db_record *rec)
100 NTSTATUS dbwrap_record_store(struct db_record *rec, TDB_DATA data, int flags)
102 return rec->store(rec, data, flags);
105 NTSTATUS dbwrap_record_delete(struct db_record *rec)
107 return rec->delete_rec(rec);
110 struct db_record *dbwrap_fetch_locked(struct db_context *db,
114 return db->fetch_locked(db, mem_ctx, key);
117 struct dbwrap_fetch_state {
122 static void dbwrap_fetch_parser(TDB_DATA key, TDB_DATA data,
125 struct dbwrap_fetch_state *state =
126 (struct dbwrap_fetch_state *)private_data;
128 state->data.dsize = data.dsize;
129 state->data.dptr = (uint8_t *)talloc_memdup(state->mem_ctx, data.dptr,
133 NTSTATUS dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
134 TDB_DATA key, TDB_DATA *value)
136 struct dbwrap_fetch_state state;
140 return NT_STATUS_INVALID_PARAMETER;
143 state.mem_ctx = mem_ctx;
145 status = dbwrap_parse_record(db, key, dbwrap_fetch_parser, &state);
146 if (!NT_STATUS_IS_OK(status)) {
149 if ((state.data.dsize != 0) && (state.data.dptr == NULL)) {
150 return NT_STATUS_NO_MEMORY;
156 bool dbwrap_exists(struct db_context *db, TDB_DATA key)
159 if (db->exists != NULL) {
160 result = db->exists(db, key);
162 result = dbwrap_fallback_exists(db,key);
164 return (result == 1);
167 NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
168 TDB_DATA data, int flags)
170 struct db_record *rec;
173 rec = dbwrap_fetch_locked(db, talloc_tos(), key);
175 return NT_STATUS_NO_MEMORY;
178 status = dbwrap_record_store(rec, data, flags);
183 NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
185 struct db_record *rec;
188 rec = dbwrap_fetch_locked(db, talloc_tos(), key);
190 return NT_STATUS_NO_MEMORY;
192 status = dbwrap_record_delete(rec);
197 NTSTATUS dbwrap_traverse(struct db_context *db,
198 int (*f)(struct db_record*, void*),
202 int ret = db->traverse(db, f, private_data);
205 return NT_STATUS_INTERNAL_DB_CORRUPTION;
215 NTSTATUS dbwrap_traverse_read(struct db_context *db,
216 int (*f)(struct db_record*, void*),
220 int ret = db->traverse_read(db, f, private_data);
223 return NT_STATUS_INTERNAL_DB_CORRUPTION;
233 static void dbwrap_null_parser(TDB_DATA key, TDB_DATA val, void* data)
238 NTSTATUS dbwrap_parse_record(struct db_context *db, TDB_DATA key,
239 void (*parser)(TDB_DATA key, TDB_DATA data,
243 if (parser == NULL) {
244 parser = dbwrap_null_parser;
247 if (db->parse_record == NULL) {
248 return dbwrap_fallback_parse_record(db, key, parser,
251 return db->parse_record(db, key, parser, private_data);
254 int dbwrap_wipe(struct db_context *db)
256 if (db->wipe == NULL) {
257 return dbwrap_fallback_wipe(db);
262 int dbwrap_get_seqnum(struct db_context *db)
264 return db->get_seqnum(db);
267 int dbwrap_get_flags(struct db_context *db)
269 return db->get_flags(db);
272 int dbwrap_transaction_start(struct db_context *db)
274 return db->transaction_start(db);
277 int dbwrap_transaction_commit(struct db_context *db)
279 return db->transaction_commit(db);
282 int dbwrap_transaction_cancel(struct db_context *db)
284 return db->transaction_cancel(db);