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.
110 struct dbwrap_change_uint32_atomic_context {
116 static NTSTATUS dbwrap_change_uint32_atomic_action(struct db_context *db,
119 struct db_record *rec;
123 struct dbwrap_change_uint32_atomic_context *state;
125 state = (struct dbwrap_change_uint32_atomic_context *)private_data;
127 rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
129 return NT_STATUS_UNSUCCESSFUL;
132 if (rec->value.dptr == NULL) {
133 val = *(state->oldval);
134 } else if (rec->value.dsize == sizeof(val)) {
135 val = IVAL(rec->value.dptr, 0);
136 *(state->oldval) = val;
138 ret = NT_STATUS_UNSUCCESSFUL;
142 val += state->change_val;
144 SIVAL(&v_store, 0, val);
146 ret = rec->store(rec,
147 make_tdb_data((const uint8 *)&v_store,
156 NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
157 uint32_t *oldval, uint32_t change_val)
160 struct dbwrap_change_uint32_atomic_context state;
162 state.keystr = keystr;
163 state.oldval = oldval;
164 state.change_val = change_val;
166 ret = dbwrap_change_uint32_atomic_action(db, &state);
171 NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
177 struct dbwrap_change_uint32_atomic_context state;
179 state.keystr = keystr;
180 state.oldval = oldval;
181 state.change_val = change_val;
183 ret = dbwrap_trans_do(db, dbwrap_change_uint32_atomic_action, &state);
189 * Atomic integer change (addition):
191 * if value does not exist yet in the db, use *oldval as initial old value.
192 * return old value in *oldval.
193 * store *oldval + change_val to db.
196 struct dbwrap_change_int32_atomic_context {
202 static NTSTATUS dbwrap_change_int32_atomic_action(struct db_context *db,
205 struct db_record *rec;
209 struct dbwrap_change_int32_atomic_context *state;
211 state = (struct dbwrap_change_int32_atomic_context *)private_data;
213 rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
215 return NT_STATUS_UNSUCCESSFUL;
218 if (rec->value.dptr == NULL) {
219 val = *(state->oldval);
220 } else if (rec->value.dsize == sizeof(val)) {
221 val = IVAL(rec->value.dptr, 0);
222 *(state->oldval) = val;
224 ret = NT_STATUS_UNSUCCESSFUL;
228 val += state->change_val;
230 data.dsize = sizeof(val);
231 data.dptr = (uint8 *)&val;
233 ret = rec->store(rec, data, TDB_REPLACE);
240 NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
241 int32_t *oldval, int32_t change_val)
244 struct dbwrap_change_int32_atomic_context state;
246 state.keystr = keystr;
247 state.oldval = oldval;
248 state.change_val = change_val;
250 ret = dbwrap_change_int32_atomic_action(db, &state);
255 NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
261 struct dbwrap_change_int32_atomic_context state;
263 state.keystr = keystr;
264 state.oldval = oldval;
265 state.change_val = change_val;
267 ret = dbwrap_trans_do(db, dbwrap_change_int32_atomic_action, &state);
272 struct dbwrap_store_context {
278 static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
280 struct db_record *rec = NULL;
282 struct dbwrap_store_context *store_ctx;
284 store_ctx = (struct dbwrap_store_context *)private_data;
286 rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
288 DEBUG(5, ("fetch_locked failed\n"));
289 return NT_STATUS_NO_MEMORY;
292 status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
293 if (!NT_STATUS_IS_OK(status)) {
294 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
301 NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
305 struct dbwrap_store_context store_ctx;
307 store_ctx.key = &key;
308 store_ctx.dbuf = &dbuf;
309 store_ctx.flag = flag;
311 status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
316 static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
319 struct db_record *rec;
320 TDB_DATA *key = (TDB_DATA *)private_data;
322 rec = db->fetch_locked(db, talloc_tos(), *key);
324 DEBUG(5, ("fetch_locked failed\n"));
325 return NT_STATUS_NO_MEMORY;
328 status = rec->delete_rec(rec);
329 if (!NT_STATUS_IS_OK(status)) {
330 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
337 NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
341 status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
346 NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
351 SIVAL(&v_store, 0, v);
353 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
354 make_tdb_data((const uint8 *)&v_store,
359 NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
364 SIVAL(&v_store, 0, v);
366 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
367 make_tdb_data((const uint8 *)&v_store,
372 NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
373 TDB_DATA data, int flags)
375 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
378 NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
380 return dbwrap_trans_delete(db, string_term_tdb_data(key));
384 * Wrap db action(s) into a transaction.
386 NTSTATUS dbwrap_trans_do(struct db_context *db,
387 NTSTATUS (*action)(struct db_context *, void *),
393 res = db->transaction_start(db);
395 DEBUG(5, ("transaction_start failed\n"));
396 return NT_STATUS_INTERNAL_DB_CORRUPTION;
399 status = action(db, private_data);
400 if (!NT_STATUS_IS_OK(status)) {
401 if (db->transaction_cancel(db) != 0) {
402 smb_panic("Cancelling transaction failed");
407 res = db->transaction_commit(db);
412 DEBUG(2, ("transaction_commit failed\n"));
413 return NT_STATUS_INTERNAL_DB_CORRUPTION;
416 NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
421 key_upper = talloc_strdup_upper(talloc_tos(), key);
422 if (key_upper == NULL) {
423 return NT_STATUS_NO_MEMORY;
426 status = dbwrap_delete_bystring(db, key_upper);
428 talloc_free(key_upper);
432 NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
433 TDB_DATA data, int flags)
438 key_upper = talloc_strdup_upper(talloc_tos(), key);
439 if (key_upper == NULL) {
440 return NT_STATUS_NO_MEMORY;
443 status = dbwrap_store_bystring(db, key_upper, data, flags);
445 talloc_free(key_upper);
449 TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
455 key_upper = talloc_strdup_upper(talloc_tos(), key);
456 if (key_upper == NULL) {
457 return make_tdb_data(NULL, 0);
460 result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
462 talloc_free(key_upper);