source: branches/samba-3.2.x/source/lib/dbwrap_util.c

Last change on this file was 232, checked in by Herwig Bauernfeind, 16 years ago

Update 3.2 branch to 3.2.8
File size: 7.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Utility functions for the dbwrap API
4 Copyright (C) Volker Lendecke 2007
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19*/
20
21#include "includes.h"
22
23int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
24{
25 TDB_DATA dbuf;
26 int32 ret;
27
28 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
29 return -1;
30 }
31
32 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
33 TALLOC_FREE(dbuf.dptr);
34 return -1;
35 }
36
37 ret = IVAL(dbuf.dptr, 0);
38 TALLOC_FREE(dbuf.dptr);
39 return ret;
40}
41
42int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
43{
44 struct db_record *rec;
45 int32 v_store;
46 NTSTATUS status;
47
48 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
49 if (rec == NULL) {
50 return -1;
51 }
52
53 SIVAL(&v_store, 0, v);
54
55 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
56 sizeof(v_store)),
57 TDB_REPLACE);
58 TALLOC_FREE(rec);
59 return NT_STATUS_IS_OK(status) ? 0 : -1;
60}
61
62bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
63 uint32_t *val)
64{
65 TDB_DATA dbuf;
66
67 if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
68 return false;
69 }
70
71 if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
72 TALLOC_FREE(dbuf.dptr);
73 return false;
74 }
75
76 *val = IVAL(dbuf.dptr, 0);
77 TALLOC_FREE(dbuf.dptr);
78 return true;
79}
80
81int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
82{
83 struct db_record *rec;
84 uint32 v_store;
85 NTSTATUS status;
86
87 rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
88 if (rec == NULL) {
89 return -1;
90 }
91
92 SIVAL(&v_store, 0, v);
93
94 status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
95 sizeof(v_store)),
96 TDB_REPLACE);
97 TALLOC_FREE(rec);
98 return NT_STATUS_IS_OK(status) ? 0 : -1;
99}
100
101/**
102 * Atomic unsigned integer change (addition):
103 *
104 * if value does not exist yet in the db, use *oldval as initial old value.
105 * return old value in *oldval.
106 * store *oldval + change_val to db.
107 */
108uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
109 uint32_t *oldval, uint32_t change_val)
110{
111 struct db_record *rec;
112 uint32 val = -1;
113 TDB_DATA data;
114
115 if (!(rec = db->fetch_locked(db, NULL,
116 string_term_tdb_data(keystr)))) {
117 return -1;
118 }
119
120 if (rec->value.dptr == NULL) {
121 val = *oldval;
122 } else if (rec->value.dsize == sizeof(val)) {
123 val = IVAL(rec->value.dptr, 0);
124 *oldval = val;
125 } else {
126 return -1;
127 }
128
129 val += change_val;
130
131 data.dsize = sizeof(val);
132 data.dptr = (uint8 *)&val;
133
134 rec->store(rec, data, TDB_REPLACE);
135
136 TALLOC_FREE(rec);
137
138 return 0;
139}
140
141/**
142 * Atomic integer change (addition):
143 *
144 * if value does not exist yet in the db, use *oldval as initial old value.
145 * return old value in *oldval.
146 * store *oldval + change_val to db.
147 */
148int32 dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
149 int32 *oldval, int32 change_val)
150{
151 struct db_record *rec;
152 int32 val = -1;
153 TDB_DATA data;
154
155 if (!(rec = db->fetch_locked(db, NULL,
156 string_term_tdb_data(keystr)))) {
157 return -1;
158 }
159
160 if (rec->value.dptr == NULL) {
161 val = *oldval;
162 } else if (rec->value.dsize == sizeof(val)) {
163 val = IVAL(rec->value.dptr, 0);
164 *oldval = val;
165 } else {
166 return -1;
167 }
168
169 val += change_val;
170
171 data.dsize = sizeof(val);
172 data.dptr = (uint8 *)&val;
173
174 rec->store(rec, data, TDB_REPLACE);
175
176 TALLOC_FREE(rec);
177
178 return 0;
179}
180
181NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
182 int flag)
183{
184 int res;
185 struct db_record *rec = NULL;
186 NTSTATUS status;
187
188 res = db->transaction_start(db);
189 if (res != 0) {
190 DEBUG(5, ("transaction_start failed\n"));
191 return NT_STATUS_INTERNAL_DB_CORRUPTION;
192 }
193
194 rec = db->fetch_locked(db, talloc_tos(), key);
195 if (rec == NULL) {
196 DEBUG(5, ("fetch_locked failed\n"));
197 status = NT_STATUS_NO_MEMORY;
198 goto cancel;
199 }
200
201 status = rec->store(rec, dbuf, flag);
202 if (!NT_STATUS_IS_OK(status)) {
203 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
204 goto cancel;
205 }
206
207 TALLOC_FREE(rec);
208
209 res = db->transaction_commit(db);
210 if (res != 0) {
211 DEBUG(5, ("tdb_transaction_commit failed\n"));
212 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
213 goto cancel;
214 }
215
216 return NT_STATUS_OK;
217
218 cancel:
219 TALLOC_FREE(rec);
220
221 if (db->transaction_cancel(db) != 0) {
222 smb_panic("Cancelling transaction failed");
223 }
224 return status;
225}
226
227NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
228{
229 int res;
230 struct db_record *rec = NULL;
231 NTSTATUS status;
232
233 res = db->transaction_start(db);
234 if (res != 0) {
235 DEBUG(5, ("transaction_start failed\n"));
236 return NT_STATUS_INTERNAL_DB_CORRUPTION;
237 }
238
239 rec = db->fetch_locked(db, talloc_tos(), key);
240 if (rec == NULL) {
241 DEBUG(5, ("fetch_locked failed\n"));
242 status = NT_STATUS_NO_MEMORY;
243 goto cancel;
244 }
245
246 status = rec->delete_rec(rec);
247 if (!NT_STATUS_IS_OK(status)) {
248 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
249 goto cancel;
250 }
251
252 TALLOC_FREE(rec);
253
254 res = db->transaction_commit(db);
255 if (res != 0) {
256 DEBUG(5, ("tdb_transaction_commit failed\n"));
257 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
258 goto cancel;
259 }
260
261 return NT_STATUS_OK;
262
263 cancel:
264 TALLOC_FREE(rec);
265
266 if (db->transaction_cancel(db) != 0) {
267 smb_panic("Cancelling transaction failed");
268 }
269 return status;
270}
271
272NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
273 int32_t v)
274{
275 int32 v_store;
276
277 SIVAL(&v_store, 0, v);
278
279 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
280 make_tdb_data((const uint8 *)&v_store,
281 sizeof(v_store)),
282 TDB_REPLACE);
283}
284
285NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
286 uint32_t v)
287{
288 uint32 v_store;
289
290 SIVAL(&v_store, 0, v);
291
292 return dbwrap_trans_store(db, string_term_tdb_data(keystr),
293 make_tdb_data((const uint8 *)&v_store,
294 sizeof(v_store)),
295 TDB_REPLACE);
296}
297
298NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
299 TDB_DATA data, int flags)
300{
301 return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
302}
303
304NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
305{
306 return dbwrap_trans_delete(db, string_term_tdb_data(key));
307}
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