2 Unix SMB/CIFS implementation.
3 Utility functions for the dbwrap API
4 Copyright (C) Volker Lendecke 2007
5 Copyright (C) Michael Adam 2009
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
29 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
33 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
34 TALLOC_FREE(dbuf.dptr);
38 ret = IVAL(dbuf.dptr, 0);
39 TALLOC_FREE(dbuf.dptr);
43 int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
45 struct db_record *rec;
49 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
54 SIVAL(&v_store, 0, v);
56 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
60 return NT_STATUS_IS_OK(status) ? 0 : -1;
63 bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
68 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
72 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
73 TALLOC_FREE(dbuf.dptr);
77 *val = IVAL(dbuf.dptr, 0);
78 TALLOC_FREE(dbuf.dptr);
82 int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
84 struct db_record *rec;
88 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
93 SIVAL(&v_store, 0, v);
95 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
99 return NT_STATUS_IS_OK(status) ? 0 : -1;
103 * Atomic unsigned integer change (addition):
105 * if value does not exist yet in the db, use *oldval as initial old value.
106 * return old value in *oldval.
107 * store *oldval + change_val to db.
109 uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
110 uint32_t *oldval, uint32_t change_val)
112 struct db_record *rec;
116 if (!(rec = db->fetch_locked(db, NULL,
117 string_term_tdb_data(keystr)))) {
121 if (rec->value.dptr == NULL) {
123 } else if (rec->value.dsize == sizeof(val)) {
124 val = IVAL(rec->value.dptr, 0);
132 data.dsize = sizeof(val);
133 data.dptr = (uint8 *)&val;
135 rec->store(rec, data, TDB_REPLACE);
143 * Atomic integer change (addition):
145 * if value does not exist yet in the db, use *oldval as initial old value.
146 * return old value in *oldval.
147 * store *oldval + change_val to db.
149 int32 dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
150 int32 *oldval, int32 change_val)
152 struct db_record *rec;
156 if (!(rec = db->fetch_locked(db, NULL,
157 string_term_tdb_data(keystr)))) {
161 if (rec->value.dptr == NULL) {
163 } else if (rec->value.dsize == sizeof(val)) {
164 val = IVAL(rec->value.dptr, 0);
172 data.dsize = sizeof(val);
173 data.dptr = (uint8 *)&val;
175 rec->store(rec, data, TDB_REPLACE);
182 struct dbwrap_store_context {
188 static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
190 struct db_record *rec = NULL;
192 struct dbwrap_store_context *store_ctx;
194 store_ctx = (struct dbwrap_store_context *)private_data;
196 rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
198 DEBUG(5, ("fetch_locked failed\n"));
199 return NT_STATUS_NO_MEMORY;
202 status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
203 if (!NT_STATUS_IS_OK(status)) {
204 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
211 NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
215 struct dbwrap_store_context store_ctx;
217 store_ctx.key = &key;
218 store_ctx.dbuf = &dbuf;
219 store_ctx.flag = flag;
221 status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
226 static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
229 struct db_record *rec;
230 TDB_DATA *key = (TDB_DATA *)private_data;
232 rec = db->fetch_locked(db, talloc_tos(), *key);
234 DEBUG(5, ("fetch_locked failed\n"));
235 return NT_STATUS_NO_MEMORY;
238 status = rec->delete_rec(rec);
239 if (!NT_STATUS_IS_OK(status)) {
240 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
247 NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
251 status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
256 NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
261 SIVAL(&v_store, 0, v);
263 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
264 make_tdb_data((const uint8 *)&v_store,
269 NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
274 SIVAL(&v_store, 0, v);
276 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
277 make_tdb_data((const uint8 *)&v_store,
282 NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
283 TDB_DATA data, int flags)
285 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
288 NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
290 return dbwrap_trans_delete(db, string_term_tdb_data(key));
294 * Wrap db action(s) into a transaction.
296 NTSTATUS dbwrap_trans_do(struct db_context *db,
297 NTSTATUS (*action)(struct db_context *, void *),
303 res = db->transaction_start(db);
305 DEBUG(5, ("transaction_start failed\n"));
306 return NT_STATUS_INTERNAL_DB_CORRUPTION;
309 status = action(db, private_data);
310 if (!NT_STATUS_IS_OK(status)) {
311 if (db->transaction_cancel(db) != 0) {
312 smb_panic("Cancelling transaction failed");
317 res = db->transaction_commit(db);
322 DEBUG(2, ("transaction_commit failed\n"));
323 return NT_STATUS_INTERNAL_DB_CORRUPTION;
326 NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
331 key_upper = talloc_strdup_upper(talloc_tos(), key);
332 if (key_upper == NULL) {
333 return NT_STATUS_NO_MEMORY;
336 status = dbwrap_delete_bystring(db, key_upper);
338 talloc_free(key_upper);
342 NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
343 TDB_DATA data, int flags)
348 key_upper = talloc_strdup_upper(talloc_tos(), key);
349 if (key_upper == NULL) {
350 return NT_STATUS_NO_MEMORY;
353 status = dbwrap_store_bystring(db, key_upper, data, flags);
355 talloc_free(key_upper);
359 TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
365 key_upper = talloc_strdup_upper(talloc_tos(), key);
366 if (key_upper == NULL) {
367 return make_tdb_data(NULL, 0);
370 result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
372 talloc_free(key_upper);