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 struct tdb_fetch_state {
149 static int db_tdb_fetch_parse(TDB_DATA key, TDB_DATA data,
152 struct tdb_fetch_state *state =
153 (struct tdb_fetch_state *)private_data;
155 if (data.dptr == NULL) {
156 /* should not happen */
157 state->result = NT_STATUS_INTERNAL_DB_ERROR;
161 state->data.dptr = (uint8 *)talloc_memdup(state->mem_ctx, data.dptr,
163 if (state->data.dptr == NULL) {
164 state->result = NT_STATUS_NO_MEMORY;
168 state->data.dsize = data.dsize;
172 static NTSTATUS db_tdb_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
173 TDB_DATA key, TDB_DATA *pdata)
175 struct db_tdb_ctx *ctx = talloc_get_type_abort(
176 db->private_data, struct db_tdb_ctx);
178 struct tdb_fetch_state state;
181 state.mem_ctx = mem_ctx;
182 state.result = NT_STATUS_OK;
183 state.data = tdb_null;
185 ret = tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetch_parse, &state);
190 if (!NT_STATUS_IS_OK(state.result)) {
191 /* the parser has set an error code. return it */
195 status = map_nt_error_from_tdb(tdb_error(ctx->wtdb->tdb));
199 if (!NT_STATUS_IS_OK(state.result)) {
207 static int db_tdb_exists(struct db_context *db, TDB_DATA key)
209 struct db_tdb_ctx *ctx = talloc_get_type_abort(
210 db->private_data, struct db_tdb_ctx);
211 return tdb_exists(ctx->wtdb->tdb, key);
214 static int db_tdb_wipe(struct db_context *db)
216 struct db_tdb_ctx *ctx = talloc_get_type_abort(
217 db->private_data, struct db_tdb_ctx);
218 return tdb_wipe_all(ctx->wtdb->tdb);
221 static int db_tdb_parse(struct db_context *db, TDB_DATA key,
222 int (*parser)(TDB_DATA key, TDB_DATA data,
226 struct db_tdb_ctx *ctx = talloc_get_type_abort(
227 db->private_data, struct db_tdb_ctx);
229 return tdb_parse_record(ctx->wtdb->tdb, key, parser, private_data) ? -1 : 0;
232 static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
234 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
238 * This has a bug: We need to replace rec->value for correct
239 * operation, but right now brlock and locking don't use the value
240 * anymore after it was stored.
243 return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
244 NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
247 static NTSTATUS db_tdb_delete(struct db_record *rec)
249 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
252 if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
256 if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
257 return NT_STATUS_NOT_FOUND;
260 return NT_STATUS_UNSUCCESSFUL;
263 struct db_tdb_traverse_ctx {
264 struct db_context *db;
265 int (*f)(struct db_record *rec, void *private_data);
269 static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
272 struct db_tdb_traverse_ctx *ctx =
273 (struct db_tdb_traverse_ctx *)private_data;
274 struct db_record rec;
278 rec.store = db_tdb_store;
279 rec.delete_rec = db_tdb_delete;
280 rec.private_data = ctx->db->private_data;
282 return ctx->f(&rec, ctx->private_data);
285 static int db_tdb_traverse(struct db_context *db,
286 int (*f)(struct db_record *rec, void *private_data),
289 struct db_tdb_ctx *db_ctx =
290 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
291 struct db_tdb_traverse_ctx ctx;
295 ctx.private_data = private_data;
296 return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
299 static NTSTATUS db_tdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
301 return NT_STATUS_MEDIA_WRITE_PROTECTED;
304 static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
306 return NT_STATUS_MEDIA_WRITE_PROTECTED;
309 static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
312 struct db_tdb_traverse_ctx *ctx =
313 (struct db_tdb_traverse_ctx *)private_data;
314 struct db_record rec;
318 rec.store = db_tdb_store_deny;
319 rec.delete_rec = db_tdb_delete_deny;
320 rec.private_data = ctx->db->private_data;
322 return ctx->f(&rec, ctx->private_data);
325 static int db_tdb_traverse_read(struct db_context *db,
326 int (*f)(struct db_record *rec, void *private_data),
329 struct db_tdb_ctx *db_ctx =
330 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
331 struct db_tdb_traverse_ctx ctx;
335 ctx.private_data = private_data;
336 return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
339 static int db_tdb_get_seqnum(struct db_context *db)
342 struct db_tdb_ctx *db_ctx =
343 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
344 return tdb_get_seqnum(db_ctx->wtdb->tdb);
347 static int db_tdb_get_flags(struct db_context *db)
350 struct db_tdb_ctx *db_ctx =
351 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
352 return tdb_get_flags(db_ctx->wtdb->tdb);
355 static int db_tdb_transaction_start(struct db_context *db)
357 struct db_tdb_ctx *db_ctx =
358 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
359 return tdb_transaction_start(db_ctx->wtdb->tdb) ? -1 : 0;
362 static int db_tdb_transaction_commit(struct db_context *db)
364 struct db_tdb_ctx *db_ctx =
365 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
366 return tdb_transaction_commit(db_ctx->wtdb->tdb) ? -1 : 0;
369 static int db_tdb_transaction_cancel(struct db_context *db)
371 struct db_tdb_ctx *db_ctx =
372 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
373 tdb_transaction_cancel(db_ctx->wtdb->tdb);
377 struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
379 int hash_size, int tdb_flags,
380 int open_flags, mode_t mode)
382 struct db_context *result = NULL;
383 struct db_tdb_ctx *db_tdb;
384 struct loadparm_context *lp_ctx;
386 result = talloc_zero(mem_ctx, struct db_context);
387 if (result == NULL) {
388 DEBUG(0, ("talloc failed\n"));
391 lp_ctx = loadparm_init_s3(result, loadparm_s3_context());
393 result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
394 if (db_tdb == NULL) {
395 DEBUG(0, ("talloc failed\n"));
399 db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
400 open_flags, mode, lp_ctx);
401 talloc_unlink(result, lp_ctx);
402 if (db_tdb->wtdb == NULL) {
403 DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
407 result->fetch_locked = db_tdb_fetch_locked;
408 result->fetch = db_tdb_fetch;
409 result->traverse = db_tdb_traverse;
410 result->traverse_read = db_tdb_traverse_read;
411 result->parse_record = db_tdb_parse;
412 result->get_seqnum = db_tdb_get_seqnum;
413 result->get_flags = db_tdb_get_flags;
414 result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
415 result->transaction_start = db_tdb_transaction_start;
416 result->transaction_commit = db_tdb_transaction_commit;
417 result->transaction_cancel = db_tdb_transaction_cancel;
418 result->exists = db_tdb_exists;
419 result->wipe = db_tdb_wipe;
423 if (result != NULL) {