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/tdb_wrap/tdb_wrap.h"
25 #include "lib/util/util_tdb.h"
26 #include "system/filesys.h"
27 #include "lib/param/param.h"
28 #include "libcli/util/error.h"
31 struct tdb_wrap *wtdb;
39 static NTSTATUS db_tdb_storev(struct db_record *rec,
40 const TDB_DATA *dbufs, int num_dbufs, int flag);
41 static NTSTATUS db_tdb_delete(struct db_record *rec);
43 static void db_tdb_log_key(const char *prefix, TDB_DATA key)
48 if (DEBUGLEVEL < 10) {
51 frame = talloc_stackframe();
53 if (DEBUGLEVEL == 10) {
55 * Only fully spam at debuglevel > 10
57 len = MIN(10, key.dsize);
59 keystr = hex_encode_talloc(frame, (unsigned char *)(key.dptr),
61 DBG_DEBUG("%s key %s\n", prefix, keystr);
65 static int db_tdb_record_destr(struct db_record* data)
67 struct db_tdb_ctx *ctx =
68 talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
70 db_tdb_log_key("Unlocking", data->key);
71 tdb_chainunlock(ctx->wtdb->tdb, data->key);
75 struct tdb_fetch_locked_state {
77 struct db_record *result;
80 static int db_tdb_fetchlock_parse(TDB_DATA key, TDB_DATA data,
83 struct tdb_fetch_locked_state *state =
84 (struct tdb_fetch_locked_state *)private_data;
85 struct db_record *result;
87 result = (struct db_record *)talloc_size(
89 sizeof(struct db_record) + key.dsize + data.dsize);
94 state->result = result;
96 result->key.dsize = key.dsize;
97 result->key.dptr = ((uint8_t *)result) + sizeof(struct db_record);
98 memcpy(result->key.dptr, key.dptr, key.dsize);
100 result->value.dsize = data.dsize;
102 if (data.dsize > 0) {
103 result->value.dptr = result->key.dptr+key.dsize;
104 memcpy(result->value.dptr, data.dptr, data.dsize);
107 result->value.dptr = NULL;
113 static struct db_record *db_tdb_fetch_locked_internal(
114 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
116 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
118 struct tdb_fetch_locked_state state;
121 state = (struct tdb_fetch_locked_state) {
125 ret = tdb_parse_record(ctx->wtdb->tdb,
127 db_tdb_fetchlock_parse,
129 if ((ret < 0) && (tdb_error(ctx->wtdb->tdb) != TDB_ERR_NOEXIST)) {
130 tdb_chainunlock(ctx->wtdb->tdb, key);
134 if (state.result == NULL) {
135 db_tdb_fetchlock_parse(key, tdb_null, &state);
138 if (state.result == NULL) {
139 tdb_chainunlock(ctx->wtdb->tdb, key);
143 talloc_set_destructor(state.result, db_tdb_record_destr);
145 state.result->private_data = ctx;
146 state.result->storev = db_tdb_storev;
147 state.result->delete_rec = db_tdb_delete;
149 DBG_DEBUG("Allocated locked data %p\n", state.result);
154 static struct db_record *db_tdb_fetch_locked(
155 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
157 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
160 db_tdb_log_key("Locking", key);
161 if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
162 DEBUG(3, ("tdb_chainlock failed\n"));
165 return db_tdb_fetch_locked_internal(db, mem_ctx, key);
168 static struct db_record *db_tdb_try_fetch_locked(
169 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
171 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
174 db_tdb_log_key("Trying to lock", key);
175 if (tdb_chainlock_nonblock(ctx->wtdb->tdb, key) != 0) {
176 DEBUG(3, ("tdb_chainlock_nonblock failed\n"));
179 return db_tdb_fetch_locked_internal(db, mem_ctx, key);
182 static NTSTATUS db_tdb_do_locked(struct db_context *db, TDB_DATA key,
183 void (*fn)(struct db_record *rec,
187 struct db_tdb_ctx *ctx = talloc_get_type_abort(
188 db->private_data, struct db_tdb_ctx);
190 struct db_record rec;
193 ret = tdb_chainlock(ctx->wtdb->tdb, key);
195 enum TDB_ERROR err = tdb_error(ctx->wtdb->tdb);
196 DBG_DEBUG("tdb_chainlock failed: %s\n",
197 tdb_errorstr(ctx->wtdb->tdb));
198 return map_nt_error_from_tdb(err);
201 ret = tdb_fetch_talloc(ctx->wtdb->tdb, key, ctx, &buf);
203 if ((ret != 0) && (ret != ENOENT)) {
204 DBG_DEBUG("tdb_fetch_talloc failed: %s\n",
206 tdb_chainunlock(ctx->wtdb->tdb, key);
207 return map_nt_error_from_unix_common(ret);
210 rec = (struct db_record) {
211 .db = db, .key = key,
212 .value = (struct TDB_DATA) { .dptr = buf,
213 .dsize = talloc_get_size(buf) },
214 .storev = db_tdb_storev, .delete_rec = db_tdb_delete,
218 fn(&rec, private_data);
222 tdb_chainunlock(ctx->wtdb->tdb, key);
227 static int db_tdb_exists(struct db_context *db, TDB_DATA key)
229 struct db_tdb_ctx *ctx = talloc_get_type_abort(
230 db->private_data, struct db_tdb_ctx);
231 return tdb_exists(ctx->wtdb->tdb, key);
234 static int db_tdb_wipe(struct db_context *db)
236 struct db_tdb_ctx *ctx = talloc_get_type_abort(
237 db->private_data, struct db_tdb_ctx);
238 return tdb_wipe_all(ctx->wtdb->tdb);
241 static int db_tdb_check(struct db_context *db)
243 struct db_tdb_ctx *ctx = talloc_get_type_abort(
244 db->private_data, struct db_tdb_ctx);
245 return tdb_check(ctx->wtdb->tdb, NULL, NULL);
248 struct db_tdb_parse_state {
249 void (*parser)(TDB_DATA key, TDB_DATA data,
255 * tdb_parse_record expects a parser returning int, mixing up tdb and
256 * parser errors. Wrap around that by always returning 0 and have
257 * dbwrap_parse_record expect a parser returning void.
260 static int db_tdb_parser(TDB_DATA key, TDB_DATA data, void *private_data)
262 struct db_tdb_parse_state *state =
263 (struct db_tdb_parse_state *)private_data;
264 state->parser(key, data, state->private_data);
268 static NTSTATUS db_tdb_parse(struct db_context *db, TDB_DATA key,
269 void (*parser)(TDB_DATA key, TDB_DATA data,
273 struct db_tdb_ctx *ctx = talloc_get_type_abort(
274 db->private_data, struct db_tdb_ctx);
275 struct db_tdb_parse_state state;
278 state.parser = parser;
279 state.private_data = private_data;
281 ret = tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_parser, &state);
284 return map_nt_error_from_tdb(tdb_error(ctx->wtdb->tdb));
289 static NTSTATUS db_tdb_storev(struct db_record *rec,
290 const TDB_DATA *dbufs, int num_dbufs, int flag)
292 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
297 * This has a bug: We need to replace rec->value for correct
298 * operation, but right now brlock and locking don't use the value
299 * anymore after it was stored.
302 ret = tdb_storev(ctx->wtdb->tdb, rec->key, dbufs, num_dbufs, flag);
303 return (ret == 0) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
306 static NTSTATUS db_tdb_delete(struct db_record *rec)
308 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
311 if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
315 if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
316 return NT_STATUS_NOT_FOUND;
319 return NT_STATUS_UNSUCCESSFUL;
322 struct db_tdb_traverse_ctx {
323 struct db_context *db;
324 int (*f)(struct db_record *rec, void *private_data);
328 static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
331 struct db_tdb_traverse_ctx *ctx =
332 (struct db_tdb_traverse_ctx *)private_data;
333 struct db_record rec;
337 rec.storev = db_tdb_storev;
338 rec.delete_rec = db_tdb_delete;
339 rec.private_data = ctx->db->private_data;
342 return ctx->f(&rec, ctx->private_data);
345 static int db_tdb_traverse(struct db_context *db,
346 int (*f)(struct db_record *rec, void *private_data),
349 struct db_tdb_ctx *db_ctx =
350 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
351 struct db_tdb_traverse_ctx ctx;
355 ctx.private_data = private_data;
356 return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
359 static NTSTATUS db_tdb_storev_deny(struct db_record *rec,
360 const TDB_DATA *dbufs, int num_dbufs,
363 return NT_STATUS_MEDIA_WRITE_PROTECTED;
366 static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
368 return NT_STATUS_MEDIA_WRITE_PROTECTED;
371 static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
374 struct db_tdb_traverse_ctx *ctx =
375 (struct db_tdb_traverse_ctx *)private_data;
376 struct db_record rec;
380 rec.storev = db_tdb_storev_deny;
381 rec.delete_rec = db_tdb_delete_deny;
382 rec.private_data = ctx->db->private_data;
385 return ctx->f(&rec, ctx->private_data);
388 static int db_tdb_traverse_read(struct db_context *db,
389 int (*f)(struct db_record *rec, void *private_data),
392 struct db_tdb_ctx *db_ctx =
393 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
394 struct db_tdb_traverse_ctx ctx;
398 ctx.private_data = private_data;
399 return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
402 static int db_tdb_get_seqnum(struct db_context *db)
405 struct db_tdb_ctx *db_ctx =
406 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
407 return tdb_get_seqnum(db_ctx->wtdb->tdb);
410 static int db_tdb_transaction_start(struct db_context *db)
412 struct db_tdb_ctx *db_ctx =
413 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
414 return tdb_transaction_start(db_ctx->wtdb->tdb) ? -1 : 0;
417 static NTSTATUS db_tdb_transaction_start_nonblock(struct db_context *db)
419 struct db_tdb_ctx *db_ctx =
420 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
423 ret = tdb_transaction_start_nonblock(db_ctx->wtdb->tdb);
425 return map_nt_error_from_tdb(tdb_error(db_ctx->wtdb->tdb));
430 static int db_tdb_transaction_commit(struct db_context *db)
432 struct db_tdb_ctx *db_ctx =
433 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
434 return tdb_transaction_commit(db_ctx->wtdb->tdb) ? -1 : 0;
437 static int db_tdb_transaction_cancel(struct db_context *db)
439 struct db_tdb_ctx *db_ctx =
440 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
441 tdb_transaction_cancel(db_ctx->wtdb->tdb);
445 static size_t db_tdb_id(struct db_context *db, uint8_t *id, size_t idlen)
447 struct db_tdb_ctx *db_ctx =
448 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
450 if (idlen >= sizeof(db_ctx->id)) {
451 memcpy(id, &db_ctx->id, sizeof(db_ctx->id));
454 return sizeof(db_ctx->id);
457 struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
459 int hash_size, int tdb_flags,
460 int open_flags, mode_t mode,
461 enum dbwrap_lock_order lock_order,
462 uint64_t dbwrap_flags)
464 struct db_context *result = NULL;
465 struct db_tdb_ctx *db_tdb;
468 result = talloc_zero(mem_ctx, struct db_context);
469 if (result == NULL) {
470 DEBUG(0, ("talloc failed\n"));
474 result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
475 if (db_tdb == NULL) {
476 DEBUG(0, ("talloc failed\n"));
479 result->lock_order = lock_order;
481 db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
483 if (db_tdb->wtdb == NULL) {
484 DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
488 ZERO_STRUCT(db_tdb->id);
490 if (fstat(tdb_fd(db_tdb->wtdb->tdb), &st) == -1) {
491 DEBUG(3, ("fstat failed: %s\n", strerror(errno)));
494 db_tdb->id.dev = st.st_dev;
495 db_tdb->id.ino = st.st_ino;
497 result->fetch_locked = db_tdb_fetch_locked;
498 result->try_fetch_locked = db_tdb_try_fetch_locked;
499 result->do_locked = db_tdb_do_locked;
500 result->traverse = db_tdb_traverse;
501 result->traverse_read = db_tdb_traverse_read;
502 result->parse_record = db_tdb_parse;
503 result->get_seqnum = db_tdb_get_seqnum;
504 result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
505 result->transaction_start = db_tdb_transaction_start;
506 result->transaction_start_nonblock = db_tdb_transaction_start_nonblock;
507 result->transaction_commit = db_tdb_transaction_commit;
508 result->transaction_cancel = db_tdb_transaction_cancel;
509 result->exists = db_tdb_exists;
510 result->wipe = db_tdb_wipe;
511 result->id = db_tdb_id;
512 result->check = db_tdb_check;
513 result->name = tdb_name(db_tdb->wtdb->tdb);