source: vendor/3.5.0/source3/lib/dbwrap_util.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 10.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Utility functions for the dbwrap API
4 Copyright (C) Volker Lendecke 2007
5 Copyright (C) Michael Adam 2009
6
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.
11
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.
16
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.
20*/
21
22#include "includes.h"
23
24int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
25{
26 TDB_DATA dbuf;
27 int32 ret;
28
29 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
30 return -1;
31 }
32
33 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
34 TALLOC_FREE(dbuf.dptr);
35 return -1;
36 }
37
38 ret = IVAL(dbuf.dptr, 0);
39 TALLOC_FREE(dbuf.dptr);
40 return ret;
41}
42
43int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
44{
45 struct db_record *rec;
46 int32 v_store;
47 NTSTATUS status;
48
49 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
50 if (rec == NULL) {
51 return -1;
52 }
53
54 SIVAL(&v_store, 0, v);
55
56 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
57 sizeof(v_store)),
58 TDB_REPLACE);
59 TALLOC_FREE(rec);
60 return NT_STATUS_IS_OK(status) ? 0 : -1;
61}
62
63bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
64 uint32_t *val)
65{
66 TDB_DATA dbuf;
67
68 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
69 return false;
70 }
71
72 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
73 TALLOC_FREE(dbuf.dptr);
74 return false;
75 }
76
77 *val = IVAL(dbuf.dptr, 0);
78 TALLOC_FREE(dbuf.dptr);
79 return true;
80}
81
82int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
83{
84 struct db_record *rec;
85 uint32 v_store;
86 NTSTATUS status;
87
88 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
89 if (rec == NULL) {
90 return -1;
91 }
92
93 SIVAL(&v_store, 0, v);
94
95 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
96 sizeof(v_store)),
97 TDB_REPLACE);
98 TALLOC_FREE(rec);
99 return NT_STATUS_IS_OK(status) ? 0 : -1;
100}
101
102/**
103 * Atomic unsigned integer change (addition):
104 *
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.
108 */
109
110struct dbwrap_change_uint32_atomic_context {
111 const char *keystr;
112 uint32_t *oldval;
113 uint32_t change_val;
114};
115
116static NTSTATUS dbwrap_change_uint32_atomic_action(struct db_context *db,
117 void *private_data)
118{
119 struct db_record *rec;
120 uint32 val = -1;
121 uint32_t v_store;
122 NTSTATUS ret;
123 struct dbwrap_change_uint32_atomic_context *state;
124
125 state = (struct dbwrap_change_uint32_atomic_context *)private_data;
126
127 rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
128 if (!rec) {
129 return NT_STATUS_UNSUCCESSFUL;
130 }
131
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;
137 } else {
138 ret = NT_STATUS_UNSUCCESSFUL;
139 goto done;
140 }
141
142 val += state->change_val;
143
144 SIVAL(&v_store, 0, val);
145
146 ret = rec->store(rec,
147 make_tdb_data((const uint8 *)&v_store,
148 sizeof(v_store)),
149 TDB_REPLACE);
150
151done:
152 TALLOC_FREE(rec);
153 return ret;
154}
155
156NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
157 uint32_t *oldval, uint32_t change_val)
158{
159 NTSTATUS ret;
160 struct dbwrap_change_uint32_atomic_context state;
161
162 state.keystr = keystr;
163 state.oldval = oldval;
164 state.change_val = change_val;
165
166 ret = dbwrap_change_uint32_atomic_action(db, &state);
167
168 return ret;
169}
170
171NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
172 const char *keystr,
173 uint32_t *oldval,
174 uint32_t change_val)
175{
176 NTSTATUS ret;
177 struct dbwrap_change_uint32_atomic_context state;
178
179 state.keystr = keystr;
180 state.oldval = oldval;
181 state.change_val = change_val;
182
183 ret = dbwrap_trans_do(db, dbwrap_change_uint32_atomic_action, &state);
184
185 return ret;
186}
187
188/**
189 * Atomic integer change (addition):
190 *
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.
194 */
195
196struct dbwrap_change_int32_atomic_context {
197 const char *keystr;
198 int32_t *oldval;
199 int32_t change_val;
200};
201
202static NTSTATUS dbwrap_change_int32_atomic_action(struct db_context *db,
203 void *private_data)
204{
205 struct db_record *rec;
206 int32_t val = -1;
207 int32_t v_store;
208 NTSTATUS ret;
209 struct dbwrap_change_int32_atomic_context *state;
210
211 state = (struct dbwrap_change_int32_atomic_context *)private_data;
212
213 rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
214 if (!rec) {
215 return NT_STATUS_UNSUCCESSFUL;
216 }
217
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;
223 } else {
224 ret = NT_STATUS_UNSUCCESSFUL;
225 goto done;
226 }
227
228 val += state->change_val;
229
230 SIVAL(&v_store, 0, val);
231
232 ret = rec->store(rec,
233 make_tdb_data((const uint8_t *)&v_store,
234 sizeof(v_store)),
235 TDB_REPLACE);
236
237done:
238 TALLOC_FREE(rec);
239 return ret;
240}
241
242NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
243 int32_t *oldval, int32_t change_val)
244{
245 NTSTATUS ret;
246 struct dbwrap_change_int32_atomic_context state;
247
248 state.keystr = keystr;
249 state.oldval = oldval;
250 state.change_val = change_val;
251
252 ret = dbwrap_change_int32_atomic_action(db, &state);
253
254 return ret;
255}
256
257NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
258 const char *keystr,
259 int32_t *oldval,
260 int32_t change_val)
261{
262 NTSTATUS ret;
263 struct dbwrap_change_int32_atomic_context state;
264
265 state.keystr = keystr;
266 state.oldval = oldval;
267 state.change_val = change_val;
268
269 ret = dbwrap_trans_do(db, dbwrap_change_int32_atomic_action, &state);
270
271 return ret;
272}
273
274struct dbwrap_store_context {
275 TDB_DATA *key;
276 TDB_DATA *dbuf;
277 int flag;
278};
279
280static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
281{
282 struct db_record *rec = NULL;
283 NTSTATUS status;
284 struct dbwrap_store_context *store_ctx;
285
286 store_ctx = (struct dbwrap_store_context *)private_data;
287
288 rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
289 if (rec == NULL) {
290 DEBUG(5, ("fetch_locked failed\n"));
291 return NT_STATUS_NO_MEMORY;
292 }
293
294 status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
295 if (!NT_STATUS_IS_OK(status)) {
296 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
297 }
298
299 TALLOC_FREE(rec);
300 return status;
301}
302
303NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
304 int flag)
305{
306 NTSTATUS status;
307 struct dbwrap_store_context store_ctx;
308
309 store_ctx.key = &key;
310 store_ctx.dbuf = &dbuf;
311 store_ctx.flag = flag;
312
313 status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
314
315 return status;
316}
317
318static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
319{
320 NTSTATUS status;
321 struct db_record *rec;
322 TDB_DATA *key = (TDB_DATA *)private_data;
323
324 rec = db->fetch_locked(db, talloc_tos(), *key);
325 if (rec == NULL) {
326 DEBUG(5, ("fetch_locked failed\n"));
327 return NT_STATUS_NO_MEMORY;
328 }
329
330 status = rec->delete_rec(rec);
331 if (!NT_STATUS_IS_OK(status)) {
332 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
333 }
334
335 talloc_free(rec);
336 return status;
337}
338
339NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
340{
341 NTSTATUS status;
342
343 status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
344
345 return status;
346}
347
348NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
349 int32_t v)
350{
351 int32 v_store;
352
353 SIVAL(&v_store, 0, v);
354
355 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
356 make_tdb_data((const uint8 *)&v_store,
357 sizeof(v_store)),
358 TDB_REPLACE);
359}
360
361NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
362 uint32_t v)
363{
364 uint32 v_store;
365
366 SIVAL(&v_store, 0, v);
367
368 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
369 make_tdb_data((const uint8 *)&v_store,
370 sizeof(v_store)),
371 TDB_REPLACE);
372}
373
374NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
375 TDB_DATA data, int flags)
376{
377 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
378}
379
380NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
381{
382 return dbwrap_trans_delete(db, string_term_tdb_data(key));
383}
384
385/**
386 * Wrap db action(s) into a transaction.
387 */
388NTSTATUS dbwrap_trans_do(struct db_context *db,
389 NTSTATUS (*action)(struct db_context *, void *),
390 void *private_data)
391{
392 int res;
393 NTSTATUS status;
394
395 res = db->transaction_start(db);
396 if (res != 0) {
397 DEBUG(5, ("transaction_start failed\n"));
398 return NT_STATUS_INTERNAL_DB_CORRUPTION;
399 }
400
401 status = action(db, private_data);
402 if (!NT_STATUS_IS_OK(status)) {
403 if (db->transaction_cancel(db) != 0) {
404 smb_panic("Cancelling transaction failed");
405 }
406 return status;
407 }
408
409 res = db->transaction_commit(db);
410 if (res == 0) {
411 return NT_STATUS_OK;
412 }
413
414 DEBUG(2, ("transaction_commit failed\n"));
415 return NT_STATUS_INTERNAL_DB_CORRUPTION;
416}
417
418NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
419{
420 char *key_upper;
421 NTSTATUS status;
422
423 key_upper = talloc_strdup_upper(talloc_tos(), key);
424 if (key_upper == NULL) {
425 return NT_STATUS_NO_MEMORY;
426 }
427
428 status = dbwrap_delete_bystring(db, key_upper);
429
430 talloc_free(key_upper);
431 return status;
432}
433
434NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
435 TDB_DATA data, int flags)
436{
437 char *key_upper;
438 NTSTATUS status;
439
440 key_upper = talloc_strdup_upper(talloc_tos(), key);
441 if (key_upper == NULL) {
442 return NT_STATUS_NO_MEMORY;
443 }
444
445 status = dbwrap_store_bystring(db, key_upper, data, flags);
446
447 talloc_free(key_upper);
448 return status;
449}
450
451TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
452 const char *key)
453{
454 char *key_upper;
455 TDB_DATA result;
456
457 key_upper = talloc_strdup_upper(talloc_tos(), key);
458 if (key_upper == NULL) {
459 return make_tdb_data(NULL, 0);
460 }
461
462 result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
463
464 talloc_free(key_upper);
465 return result;
466}
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