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/>.
21 #include "dbwrap/dbwrap.h"
22 #include "dbwrap/dbwrap_private.h"
23 #include "dbwrap/dbwrap_tdb.h"
24 #include "lib/util/tdb_wrap.h"
25 #include "lib/param/param.h"
29 struct tdb_wrap *wtdb;
32 static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag);
33 static NTSTATUS db_tdb_delete(struct db_record *rec);
35 static void db_tdb_log_key(const char *prefix, TDB_DATA key)
40 if (DEBUGLEVEL < 10) {
44 if (DEBUGLEVEL == 10) {
46 * Only fully spam at debuglevel > 10
48 len = MIN(10, key.dsize);
50 keystr = hex_encode_talloc(talloc_tos(), (unsigned char *)(key.dptr),
52 DEBUG(10, ("%s key %s\n", prefix, keystr));
56 static int db_tdb_record_destr(struct db_record* data)
58 struct db_tdb_ctx *ctx =
59 talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
61 db_tdb_log_key("Unlocking", data->key);
62 tdb_chainunlock(ctx->wtdb->tdb, data->key);
66 struct tdb_fetch_locked_state {
68 struct db_record *result;
71 static int db_tdb_fetchlock_parse(TDB_DATA key, TDB_DATA data,
74 struct tdb_fetch_locked_state *state =
75 (struct tdb_fetch_locked_state *)private_data;
76 struct db_record *result;
78 result = (struct db_record *)talloc_size(
80 sizeof(struct db_record) + key.dsize + data.dsize);
85 state->result = result;
87 result->key.dsize = key.dsize;
88 result->key.dptr = ((uint8 *)result) + sizeof(struct db_record);
89 memcpy(result->key.dptr, key.dptr, key.dsize);
91 result->value.dsize = data.dsize;
94 result->value.dptr = result->key.dptr+key.dsize;
95 memcpy(result->value.dptr, data.dptr, data.dsize);
98 result->value.dptr = NULL;
104 static struct db_record *db_tdb_fetch_locked(struct db_context *db,
105 TALLOC_CTX *mem_ctx, TDB_DATA key)
107 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
109 struct tdb_fetch_locked_state state;
111 db_tdb_log_key("Locking", key);
113 if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
114 DEBUG(3, ("tdb_chainlock failed\n"));
118 state.mem_ctx = mem_ctx;
121 tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetchlock_parse, &state);
123 if (state.result == NULL) {
124 db_tdb_fetchlock_parse(key, tdb_null, &state);
127 if (state.result == NULL) {
128 tdb_chainunlock(ctx->wtdb->tdb, key);
132 talloc_set_destructor(state.result, db_tdb_record_destr);
134 state.result->private_data = talloc_reference(state.result, ctx);
135 state.result->store = db_tdb_store;
136 state.result->delete_rec = db_tdb_delete;
138 DEBUG(10, ("Allocated locked data 0x%p\n", state.result));
143 static int db_tdb_exists(struct db_context *db, TDB_DATA key)
145 struct db_tdb_ctx *ctx = talloc_get_type_abort(
146 db->private_data, struct db_tdb_ctx);
147 return tdb_exists(ctx->wtdb->tdb, key);
150 static int db_tdb_wipe(struct db_context *db)
152 struct db_tdb_ctx *ctx = talloc_get_type_abort(
153 db->private_data, struct db_tdb_ctx);
154 return tdb_wipe_all(ctx->wtdb->tdb);
157 struct db_tdb_parse_state {
158 void (*parser)(TDB_DATA key, TDB_DATA data,
164 * tdb_parse_record expects a parser returning int, mixing up tdb and
165 * parser errors. Wrap around that by always returning 0 and have
166 * dbwrap_parse_record expect a parser returning void.
169 static int db_tdb_parser(TDB_DATA key, TDB_DATA data, void *private_data)
171 struct db_tdb_parse_state *state =
172 (struct db_tdb_parse_state *)private_data;
173 state->parser(key, data, state->private_data);
177 static NTSTATUS db_tdb_parse(struct db_context *db, TDB_DATA key,
178 void (*parser)(TDB_DATA key, TDB_DATA data,
182 struct db_tdb_ctx *ctx = talloc_get_type_abort(
183 db->private_data, struct db_tdb_ctx);
184 struct db_tdb_parse_state state;
187 state.parser = parser;
188 state.private_data = private_data;
190 ret = tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_parser, &state);
191 return map_nt_error_from_tdb(ret);
194 static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
196 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
200 * This has a bug: We need to replace rec->value for correct
201 * operation, but right now brlock and locking don't use the value
202 * anymore after it was stored.
205 return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
206 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
209 static NTSTATUS db_tdb_delete(struct db_record *rec)
211 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
214 if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
218 if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
219 return NT_STATUS_NOT_FOUND;
222 return NT_STATUS_UNSUCCESSFUL;
225 struct db_tdb_traverse_ctx {
226 struct db_context *db;
227 int (*f)(struct db_record *rec, void *private_data);
231 static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
234 struct db_tdb_traverse_ctx *ctx =
235 (struct db_tdb_traverse_ctx *)private_data;
236 struct db_record rec;
240 rec.store = db_tdb_store;
241 rec.delete_rec = db_tdb_delete;
242 rec.private_data = ctx->db->private_data;
244 return ctx->f(&rec, ctx->private_data);
247 static int db_tdb_traverse(struct db_context *db,
248 int (*f)(struct db_record *rec, void *private_data),
251 struct db_tdb_ctx *db_ctx =
252 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
253 struct db_tdb_traverse_ctx ctx;
257 ctx.private_data = private_data;
258 return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
261 static NTSTATUS db_tdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
263 return NT_STATUS_MEDIA_WRITE_PROTECTED;
266 static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
268 return NT_STATUS_MEDIA_WRITE_PROTECTED;
271 static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
274 struct db_tdb_traverse_ctx *ctx =
275 (struct db_tdb_traverse_ctx *)private_data;
276 struct db_record rec;
280 rec.store = db_tdb_store_deny;
281 rec.delete_rec = db_tdb_delete_deny;
282 rec.private_data = ctx->db->private_data;
284 return ctx->f(&rec, ctx->private_data);
287 static int db_tdb_traverse_read(struct db_context *db,
288 int (*f)(struct db_record *rec, void *private_data),
291 struct db_tdb_ctx *db_ctx =
292 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
293 struct db_tdb_traverse_ctx ctx;
297 ctx.private_data = private_data;
298 return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
301 static int db_tdb_get_seqnum(struct db_context *db)
304 struct db_tdb_ctx *db_ctx =
305 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
306 return tdb_get_seqnum(db_ctx->wtdb->tdb);
309 static int db_tdb_get_flags(struct db_context *db)
312 struct db_tdb_ctx *db_ctx =
313 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
314 return tdb_get_flags(db_ctx->wtdb->tdb);
317 static int db_tdb_transaction_start(struct db_context *db)
319 struct db_tdb_ctx *db_ctx =
320 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
321 return tdb_transaction_start(db_ctx->wtdb->tdb) ? -1 : 0;
324 static int db_tdb_transaction_commit(struct db_context *db)
326 struct db_tdb_ctx *db_ctx =
327 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
328 return tdb_transaction_commit(db_ctx->wtdb->tdb) ? -1 : 0;
331 static int db_tdb_transaction_cancel(struct db_context *db)
333 struct db_tdb_ctx *db_ctx =
334 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
335 tdb_transaction_cancel(db_ctx->wtdb->tdb);
339 struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
341 int hash_size, int tdb_flags,
342 int open_flags, mode_t mode)
344 struct db_context *result = NULL;
345 struct db_tdb_ctx *db_tdb;
346 struct loadparm_context *lp_ctx;
348 result = talloc_zero(mem_ctx, struct db_context);
349 if (result == NULL) {
350 DEBUG(0, ("talloc failed\n"));
353 lp_ctx = loadparm_init_s3(result, loadparm_s3_context());
355 result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
356 if (db_tdb == NULL) {
357 DEBUG(0, ("talloc failed\n"));
361 db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
362 open_flags, mode, lp_ctx);
363 talloc_unlink(result, lp_ctx);
364 if (db_tdb->wtdb == NULL) {
365 DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
369 result->fetch_locked = db_tdb_fetch_locked;
370 result->traverse = db_tdb_traverse;
371 result->traverse_read = db_tdb_traverse_read;
372 result->parse_record = db_tdb_parse;
373 result->get_seqnum = db_tdb_get_seqnum;
374 result->get_flags = db_tdb_get_flags;
375 result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
376 result->transaction_start = db_tdb_transaction_start;
377 result->transaction_commit = db_tdb_transaction_commit;
378 result->transaction_cancel = db_tdb_transaction_cancel;
379 result->exists = db_tdb_exists;
380 result->wipe = db_tdb_wipe;
384 if (result != NULL) {