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 NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
110 uint32_t *oldval, uint32_t change_val)
112 struct db_record *rec;
117 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
119 return NT_STATUS_UNSUCCESSFUL;
122 if (rec->value.dptr == NULL) {
124 } else if (rec->value.dsize == sizeof(val)) {
125 val = IVAL(rec->value.dptr, 0);
128 ret = NT_STATUS_UNSUCCESSFUL;
134 data.dsize = sizeof(val);
135 data.dptr = (uint8 *)&val;
137 ret = rec->store(rec, data, TDB_REPLACE);
145 * Atomic integer change (addition):
147 * if value does not exist yet in the db, use *oldval as initial old value.
148 * return old value in *oldval.
149 * store *oldval + change_val to db.
151 NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
152 int32 *oldval, int32 change_val)
154 struct db_record *rec;
159 if (!(rec = db->fetch_locked(db, NULL,
160 string_term_tdb_data(keystr)))) {
161 return NT_STATUS_UNSUCCESSFUL;
164 if (rec->value.dptr == NULL) {
166 } else if (rec->value.dsize == sizeof(val)) {
167 val = IVAL(rec->value.dptr, 0);
170 ret = NT_STATUS_UNSUCCESSFUL;
176 data.dsize = sizeof(val);
177 data.dptr = (uint8 *)&val;
179 ret = rec->store(rec, data, TDB_REPLACE);
186 struct dbwrap_store_context {
192 static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
194 struct db_record *rec = NULL;
196 struct dbwrap_store_context *store_ctx;
198 store_ctx = (struct dbwrap_store_context *)private_data;
200 rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
202 DEBUG(5, ("fetch_locked failed\n"));
203 return NT_STATUS_NO_MEMORY;
206 status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
207 if (!NT_STATUS_IS_OK(status)) {
208 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
215 NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
219 struct dbwrap_store_context store_ctx;
221 store_ctx.key = &key;
222 store_ctx.dbuf = &dbuf;
223 store_ctx.flag = flag;
225 status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
230 static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
233 struct db_record *rec;
234 TDB_DATA *key = (TDB_DATA *)private_data;
236 rec = db->fetch_locked(db, talloc_tos(), *key);
238 DEBUG(5, ("fetch_locked failed\n"));
239 return NT_STATUS_NO_MEMORY;
242 status = rec->delete_rec(rec);
243 if (!NT_STATUS_IS_OK(status)) {
244 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
251 NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
255 status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
260 NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
265 SIVAL(&v_store, 0, v);
267 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
268 make_tdb_data((const uint8 *)&v_store,
273 NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
278 SIVAL(&v_store, 0, v);
280 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
281 make_tdb_data((const uint8 *)&v_store,
286 NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
287 TDB_DATA data, int flags)
289 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
292 NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
294 return dbwrap_trans_delete(db, string_term_tdb_data(key));
298 * Wrap db action(s) into a transaction.
300 NTSTATUS dbwrap_trans_do(struct db_context *db,
301 NTSTATUS (*action)(struct db_context *, void *),
307 res = db->transaction_start(db);
309 DEBUG(5, ("transaction_start failed\n"));
310 return NT_STATUS_INTERNAL_DB_CORRUPTION;
313 status = action(db, private_data);
314 if (!NT_STATUS_IS_OK(status)) {
315 if (db->transaction_cancel(db) != 0) {
316 smb_panic("Cancelling transaction failed");
321 res = db->transaction_commit(db);
326 DEBUG(2, ("transaction_commit failed\n"));
327 return NT_STATUS_INTERNAL_DB_CORRUPTION;
330 NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
335 key_upper = talloc_strdup_upper(talloc_tos(), key);
336 if (key_upper == NULL) {
337 return NT_STATUS_NO_MEMORY;
340 status = dbwrap_delete_bystring(db, key_upper);
342 talloc_free(key_upper);
346 NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
347 TDB_DATA data, int flags)
352 key_upper = talloc_strdup_upper(talloc_tos(), key);
353 if (key_upper == NULL) {
354 return NT_STATUS_NO_MEMORY;
357 status = dbwrap_store_bystring(db, key_upper, data, flags);
359 talloc_free(key_upper);
363 TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
369 key_upper = talloc_strdup_upper(talloc_tos(), key);
370 if (key_upper == NULL) {
371 return make_tdb_data(NULL, 0);
374 result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
376 talloc_free(key_upper);