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 data.dsize = sizeof(val);
145 data.dptr = (uint8 *)&val;
147 ret = rec->store(rec, data, TDB_REPLACE);
154 NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
155 uint32_t *oldval, uint32_t change_val)
158 struct dbwrap_change_uint32_atomic_context state;
160 state.keystr = keystr;
161 state.oldval = oldval;
162 state.change_val = change_val;
164 ret = dbwrap_change_uint32_atomic_action(db, &state);
169 NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
175 struct dbwrap_change_uint32_atomic_context state;
177 state.keystr = keystr;
178 state.oldval = oldval;
179 state.change_val = change_val;
181 ret = dbwrap_trans_do(db, dbwrap_change_uint32_atomic_action, &state);
187 * Atomic integer change (addition):
189 * if value does not exist yet in the db, use *oldval as initial old value.
190 * return old value in *oldval.
191 * store *oldval + change_val to db.
194 struct dbwrap_change_int32_atomic_context {
200 static NTSTATUS dbwrap_change_int32_atomic_action(struct db_context *db,
203 struct db_record *rec;
207 struct dbwrap_change_int32_atomic_context *state;
209 state = (struct dbwrap_change_int32_atomic_context *)private_data;
211 rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
213 return NT_STATUS_UNSUCCESSFUL;
216 if (rec->value.dptr == NULL) {
217 val = *(state->oldval);
218 } else if (rec->value.dsize == sizeof(val)) {
219 val = IVAL(rec->value.dptr, 0);
220 *(state->oldval) = val;
222 ret = NT_STATUS_UNSUCCESSFUL;
226 val += state->change_val;
228 data.dsize = sizeof(val);
229 data.dptr = (uint8 *)&val;
231 ret = rec->store(rec, data, TDB_REPLACE);
238 NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
239 int32_t *oldval, int32_t change_val)
242 struct dbwrap_change_int32_atomic_context state;
244 state.keystr = keystr;
245 state.oldval = oldval;
246 state.change_val = change_val;
248 ret = dbwrap_change_int32_atomic_action(db, &state);
253 struct dbwrap_store_context {
259 static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
261 struct db_record *rec = NULL;
263 struct dbwrap_store_context *store_ctx;
265 store_ctx = (struct dbwrap_store_context *)private_data;
267 rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
269 DEBUG(5, ("fetch_locked failed\n"));
270 return NT_STATUS_NO_MEMORY;
273 status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
274 if (!NT_STATUS_IS_OK(status)) {
275 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
282 NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
286 struct dbwrap_store_context store_ctx;
288 store_ctx.key = &key;
289 store_ctx.dbuf = &dbuf;
290 store_ctx.flag = flag;
292 status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
297 static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
300 struct db_record *rec;
301 TDB_DATA *key = (TDB_DATA *)private_data;
303 rec = db->fetch_locked(db, talloc_tos(), *key);
305 DEBUG(5, ("fetch_locked failed\n"));
306 return NT_STATUS_NO_MEMORY;
309 status = rec->delete_rec(rec);
310 if (!NT_STATUS_IS_OK(status)) {
311 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
318 NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
322 status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
327 NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
332 SIVAL(&v_store, 0, v);
334 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
335 make_tdb_data((const uint8 *)&v_store,
340 NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
345 SIVAL(&v_store, 0, v);
347 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
348 make_tdb_data((const uint8 *)&v_store,
353 NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
354 TDB_DATA data, int flags)
356 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
359 NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
361 return dbwrap_trans_delete(db, string_term_tdb_data(key));
365 * Wrap db action(s) into a transaction.
367 NTSTATUS dbwrap_trans_do(struct db_context *db,
368 NTSTATUS (*action)(struct db_context *, void *),
374 res = db->transaction_start(db);
376 DEBUG(5, ("transaction_start failed\n"));
377 return NT_STATUS_INTERNAL_DB_CORRUPTION;
380 status = action(db, private_data);
381 if (!NT_STATUS_IS_OK(status)) {
382 if (db->transaction_cancel(db) != 0) {
383 smb_panic("Cancelling transaction failed");
388 res = db->transaction_commit(db);
393 DEBUG(2, ("transaction_commit failed\n"));
394 return NT_STATUS_INTERNAL_DB_CORRUPTION;
397 NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
402 key_upper = talloc_strdup_upper(talloc_tos(), key);
403 if (key_upper == NULL) {
404 return NT_STATUS_NO_MEMORY;
407 status = dbwrap_delete_bystring(db, key_upper);
409 talloc_free(key_upper);
413 NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
414 TDB_DATA data, int flags)
419 key_upper = talloc_strdup_upper(talloc_tos(), key);
420 if (key_upper == NULL) {
421 return NT_STATUS_NO_MEMORY;
424 status = dbwrap_store_bystring(db, key_upper, data, flags);
426 talloc_free(key_upper);
430 TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
436 key_upper = talloc_strdup_upper(talloc_tos(), key);
437 if (key_upper == NULL) {
438 return make_tdb_data(NULL, 0);
441 result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
443 talloc_free(key_upper);