2 Unix SMB/CIFS implementation.
3 Database interface wrapper around tdb
4 Copyright (C) Volker Lendecke 2005-2007
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 3 of the License, or
9 (at your option) any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 struct tdb_wrap *wtdb;
26 static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag);
27 static NTSTATUS db_tdb_delete(struct db_record *rec);
29 static int db_tdb_record_destr(struct db_record* data)
31 struct db_tdb_ctx *ctx =
32 talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
34 DEBUG(10, (DEBUGLEVEL > 10
35 ? "Unlocking key %s\n" : "Unlocking key %20s\n",
36 hex_encode(data, (unsigned char *)data->key.dptr,
39 if (tdb_chainunlock(ctx->wtdb->tdb, data->key) != 0) {
40 DEBUG(0, ("tdb_chainunlock failed\n"));
46 static struct db_record *db_tdb_fetch_locked(struct db_context *db,
47 TALLOC_CTX *mem_ctx, TDB_DATA key)
49 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
51 struct db_record *result;
54 result = TALLOC_P(mem_ctx, struct db_record);
56 DEBUG(0, ("talloc failed\n"));
60 result->key.dsize = key.dsize;
61 result->key.dptr = (uint8 *)talloc_memdup(result, key.dptr, key.dsize);
62 if (result->key.dptr == NULL) {
63 DEBUG(0, ("talloc failed\n"));
68 result->value.dptr = NULL;
69 result->value.dsize = 0;
70 result->private_data = talloc_reference(result, ctx);
71 result->store = db_tdb_store;
72 result->delete_rec = db_tdb_delete;
74 if (DEBUGLEVEL > 10) {
75 char *keystr = hex_encode(NULL, (unsigned char *)key.dptr,
77 DEBUG(10, (DEBUGLEVEL > 10
78 ? "Locking key %s\n" : "Locking key %20s\n",
83 if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
84 DEBUG(3, ("tdb_chainlock failed\n"));
89 talloc_set_destructor(result, db_tdb_record_destr);
91 value = tdb_fetch(ctx->wtdb->tdb, key);
93 if (value.dptr == NULL) {
97 result->value.dsize = value.dsize;
98 result->value.dptr = (uint8 *)talloc_memdup(result, value.dptr,
100 if (result->value.dptr == NULL) {
101 DEBUG(3, ("talloc failed\n"));
106 SAFE_FREE(value.dptr);
108 DEBUG(10, ("Allocated locked data 0x%p\n", result));
113 static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
115 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
119 * This has a bug: We need to replace rec->value for correct
120 * operation, but right now brlock and locking don't use the value
121 * anymore after it was stored.
124 return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
125 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
128 static NTSTATUS db_tdb_delete(struct db_record *rec)
130 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
134 res = tdb_delete(ctx->wtdb->tdb, rec->key);
140 return map_nt_error_from_tdb(tdb_error(ctx->wtdb->tdb));
143 struct db_tdb_traverse_ctx {
144 struct db_context *db;
145 int (*f)(struct db_record *rec, void *private_data);
149 static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
152 struct db_tdb_traverse_ctx *ctx =
153 (struct db_tdb_traverse_ctx *)private_data;
154 struct db_record rec;
158 rec.store = db_tdb_store;
159 rec.delete_rec = db_tdb_delete;
160 rec.private_data = ctx->db->private_data;
162 return ctx->f(&rec, ctx->private_data);
165 static int db_tdb_traverse(struct db_context *db,
166 int (*f)(struct db_record *rec, void *private_data),
169 struct db_tdb_ctx *db_ctx =
170 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
171 struct db_tdb_traverse_ctx ctx;
175 ctx.private_data = private_data;
176 return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
179 static NTSTATUS db_tdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
181 return NT_STATUS_MEDIA_WRITE_PROTECTED;
184 static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
186 return NT_STATUS_MEDIA_WRITE_PROTECTED;
189 static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
192 struct db_tdb_traverse_ctx *ctx =
193 (struct db_tdb_traverse_ctx *)private_data;
194 struct db_record rec;
198 rec.store = db_tdb_store_deny;
199 rec.delete_rec = db_tdb_delete_deny;
200 rec.private_data = ctx->db->private_data;
202 return ctx->f(&rec, ctx->private_data);
205 static int db_tdb_traverse_read(struct db_context *db,
206 int (*f)(struct db_record *rec, void *private_data),
209 struct db_tdb_ctx *db_ctx =
210 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
211 struct db_tdb_traverse_ctx ctx;
215 ctx.private_data = private_data;
216 return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
219 static int db_tdb_get_seqnum(struct db_context *db)
222 struct db_tdb_ctx *db_ctx =
223 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
224 return tdb_get_seqnum(db_ctx->wtdb->tdb);
227 struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
229 int hash_size, int tdb_flags,
230 int open_flags, mode_t mode)
232 struct db_context *result = NULL;
233 struct db_tdb_ctx *db_tdb;
235 result = TALLOC_ZERO_P(mem_ctx, struct db_context);
236 if (result == NULL) {
237 DEBUG(0, ("talloc failed\n"));
241 result->private_data = db_tdb = TALLOC_P(result, struct db_tdb_ctx);
242 if (db_tdb == NULL) {
243 DEBUG(0, ("talloc failed\n"));
247 db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
249 if (db_tdb->wtdb == NULL) {
250 DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
254 result->fetch_locked = db_tdb_fetch_locked;
255 result->traverse = db_tdb_traverse;
256 result->traverse_read = db_tdb_traverse_read;
257 result->get_seqnum = db_tdb_get_seqnum;
261 if (result != NULL) {