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"
30 struct tdb_wrap *wtdb;
38 static NTSTATUS db_tdb_storev(struct db_record *rec,
39 const TDB_DATA *dbufs, int num_dbufs, int flag);
40 static NTSTATUS db_tdb_delete(struct db_record *rec);
42 static void db_tdb_log_key(const char *prefix, TDB_DATA key)
47 if (DEBUGLEVEL < 10) {
50 frame = talloc_stackframe();
52 if (DEBUGLEVEL == 10) {
54 * Only fully spam at debuglevel > 10
56 len = MIN(10, key.dsize);
58 keystr = hex_encode_talloc(frame, (unsigned char *)(key.dptr),
60 DEBUG(10, ("%s key %s\n", prefix, keystr));
64 static int db_tdb_record_destr(struct db_record* data)
66 struct db_tdb_ctx *ctx =
67 talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
69 db_tdb_log_key("Unlocking", data->key);
70 tdb_chainunlock(ctx->wtdb->tdb, data->key);
74 struct tdb_fetch_locked_state {
76 struct db_record *result;
79 static int db_tdb_fetchlock_parse(TDB_DATA key, TDB_DATA data,
82 struct tdb_fetch_locked_state *state =
83 (struct tdb_fetch_locked_state *)private_data;
84 struct db_record *result;
86 result = (struct db_record *)talloc_size(
88 sizeof(struct db_record) + key.dsize + data.dsize);
93 state->result = result;
95 result->key.dsize = key.dsize;
96 result->key.dptr = ((uint8_t *)result) + sizeof(struct db_record);
97 memcpy(result->key.dptr, key.dptr, key.dsize);
99 result->value.dsize = data.dsize;
101 if (data.dsize > 0) {
102 result->value.dptr = result->key.dptr+key.dsize;
103 memcpy(result->value.dptr, data.dptr, data.dsize);
106 result->value.dptr = NULL;
112 static struct db_record *db_tdb_fetch_locked_internal(
113 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
115 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
117 struct tdb_fetch_locked_state state;
119 state.mem_ctx = mem_ctx;
122 if ((tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetchlock_parse,
124 (tdb_error(ctx->wtdb->tdb) != TDB_ERR_NOEXIST)) {
125 tdb_chainunlock(ctx->wtdb->tdb, key);
129 if (state.result == NULL) {
130 db_tdb_fetchlock_parse(key, tdb_null, &state);
133 if (state.result == NULL) {
134 tdb_chainunlock(ctx->wtdb->tdb, key);
138 talloc_set_destructor(state.result, db_tdb_record_destr);
140 state.result->private_data = ctx;
141 state.result->storev = db_tdb_storev;
142 state.result->delete_rec = db_tdb_delete;
144 DEBUG(10, ("Allocated locked data 0x%p\n", state.result));
149 static struct db_record *db_tdb_fetch_locked(
150 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
152 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
155 db_tdb_log_key("Locking", key);
156 if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
157 DEBUG(3, ("tdb_chainlock failed\n"));
160 return db_tdb_fetch_locked_internal(db, mem_ctx, key);
163 static struct db_record *db_tdb_try_fetch_locked(
164 struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
166 struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
169 db_tdb_log_key("Trying to lock", key);
170 if (tdb_chainlock_nonblock(ctx->wtdb->tdb, key) != 0) {
171 DEBUG(3, ("tdb_chainlock_nonblock failed\n"));
174 return db_tdb_fetch_locked_internal(db, mem_ctx, key);
177 static int db_tdb_exists(struct db_context *db, TDB_DATA key)
179 struct db_tdb_ctx *ctx = talloc_get_type_abort(
180 db->private_data, struct db_tdb_ctx);
181 return tdb_exists(ctx->wtdb->tdb, key);
184 static int db_tdb_wipe(struct db_context *db)
186 struct db_tdb_ctx *ctx = talloc_get_type_abort(
187 db->private_data, struct db_tdb_ctx);
188 return tdb_wipe_all(ctx->wtdb->tdb);
191 static int db_tdb_check(struct db_context *db)
193 struct db_tdb_ctx *ctx = talloc_get_type_abort(
194 db->private_data, struct db_tdb_ctx);
195 return tdb_check(ctx->wtdb->tdb, NULL, NULL);
198 struct db_tdb_parse_state {
199 void (*parser)(TDB_DATA key, TDB_DATA data,
205 * tdb_parse_record expects a parser returning int, mixing up tdb and
206 * parser errors. Wrap around that by always returning 0 and have
207 * dbwrap_parse_record expect a parser returning void.
210 static int db_tdb_parser(TDB_DATA key, TDB_DATA data, void *private_data)
212 struct db_tdb_parse_state *state =
213 (struct db_tdb_parse_state *)private_data;
214 state->parser(key, data, state->private_data);
218 static NTSTATUS db_tdb_parse(struct db_context *db, TDB_DATA key,
219 void (*parser)(TDB_DATA key, TDB_DATA data,
223 struct db_tdb_ctx *ctx = talloc_get_type_abort(
224 db->private_data, struct db_tdb_ctx);
225 struct db_tdb_parse_state state;
228 state.parser = parser;
229 state.private_data = private_data;
231 ret = tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_parser, &state);
234 return map_nt_error_from_tdb(tdb_error(ctx->wtdb->tdb));
239 static NTSTATUS db_tdb_storev(struct db_record *rec,
240 const TDB_DATA *dbufs, int num_dbufs, int flag)
242 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
247 * This has a bug: We need to replace rec->value for correct
248 * operation, but right now brlock and locking don't use the value
249 * anymore after it was stored.
252 ret = tdb_storev(ctx->wtdb->tdb, rec->key, dbufs, num_dbufs, flag);
253 return (ret == 0) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
256 static NTSTATUS db_tdb_delete(struct db_record *rec)
258 struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
261 if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
265 if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
266 return NT_STATUS_NOT_FOUND;
269 return NT_STATUS_UNSUCCESSFUL;
272 struct db_tdb_traverse_ctx {
273 struct db_context *db;
274 int (*f)(struct db_record *rec, void *private_data);
278 static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
281 struct db_tdb_traverse_ctx *ctx =
282 (struct db_tdb_traverse_ctx *)private_data;
283 struct db_record rec;
287 rec.storev = db_tdb_storev;
288 rec.delete_rec = db_tdb_delete;
289 rec.private_data = ctx->db->private_data;
292 return ctx->f(&rec, ctx->private_data);
295 static int db_tdb_traverse(struct db_context *db,
296 int (*f)(struct db_record *rec, void *private_data),
299 struct db_tdb_ctx *db_ctx =
300 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
301 struct db_tdb_traverse_ctx ctx;
305 ctx.private_data = private_data;
306 return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
309 static NTSTATUS db_tdb_storev_deny(struct db_record *rec,
310 const TDB_DATA *dbufs, int num_dbufs,
313 return NT_STATUS_MEDIA_WRITE_PROTECTED;
316 static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
318 return NT_STATUS_MEDIA_WRITE_PROTECTED;
321 static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
324 struct db_tdb_traverse_ctx *ctx =
325 (struct db_tdb_traverse_ctx *)private_data;
326 struct db_record rec;
330 rec.storev = db_tdb_storev_deny;
331 rec.delete_rec = db_tdb_delete_deny;
332 rec.private_data = ctx->db->private_data;
335 return ctx->f(&rec, ctx->private_data);
338 static int db_tdb_traverse_read(struct db_context *db,
339 int (*f)(struct db_record *rec, void *private_data),
342 struct db_tdb_ctx *db_ctx =
343 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
344 struct db_tdb_traverse_ctx ctx;
348 ctx.private_data = private_data;
349 return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
352 static int db_tdb_get_seqnum(struct db_context *db)
355 struct db_tdb_ctx *db_ctx =
356 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
357 return tdb_get_seqnum(db_ctx->wtdb->tdb);
360 static int db_tdb_transaction_start(struct db_context *db)
362 struct db_tdb_ctx *db_ctx =
363 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
364 return tdb_transaction_start(db_ctx->wtdb->tdb) ? -1 : 0;
367 static NTSTATUS db_tdb_transaction_start_nonblock(struct db_context *db)
369 struct db_tdb_ctx *db_ctx =
370 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
373 ret = tdb_transaction_start_nonblock(db_ctx->wtdb->tdb);
375 return map_nt_error_from_tdb(tdb_error(db_ctx->wtdb->tdb));
380 static int db_tdb_transaction_commit(struct db_context *db)
382 struct db_tdb_ctx *db_ctx =
383 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
384 return tdb_transaction_commit(db_ctx->wtdb->tdb) ? -1 : 0;
387 static int db_tdb_transaction_cancel(struct db_context *db)
389 struct db_tdb_ctx *db_ctx =
390 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
391 tdb_transaction_cancel(db_ctx->wtdb->tdb);
395 static size_t db_tdb_id(struct db_context *db, uint8_t *id, size_t idlen)
397 struct db_tdb_ctx *db_ctx =
398 talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
400 if (idlen >= sizeof(db_ctx->id)) {
401 memcpy(id, &db_ctx->id, sizeof(db_ctx->id));
404 return sizeof(db_ctx->id);
407 struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
409 int hash_size, int tdb_flags,
410 int open_flags, mode_t mode,
411 enum dbwrap_lock_order lock_order,
412 uint64_t dbwrap_flags)
414 struct db_context *result = NULL;
415 struct db_tdb_ctx *db_tdb;
418 result = talloc_zero(mem_ctx, struct db_context);
419 if (result == NULL) {
420 DEBUG(0, ("talloc failed\n"));
424 result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
425 if (db_tdb == NULL) {
426 DEBUG(0, ("talloc failed\n"));
429 result->lock_order = lock_order;
431 db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
433 if (db_tdb->wtdb == NULL) {
434 DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
438 ZERO_STRUCT(db_tdb->id);
440 if (fstat(tdb_fd(db_tdb->wtdb->tdb), &st) == -1) {
441 DEBUG(3, ("fstat failed: %s\n", strerror(errno)));
444 db_tdb->id.dev = st.st_dev;
445 db_tdb->id.ino = st.st_ino;
447 result->fetch_locked = db_tdb_fetch_locked;
448 result->try_fetch_locked = db_tdb_try_fetch_locked;
449 result->traverse = db_tdb_traverse;
450 result->traverse_read = db_tdb_traverse_read;
451 result->parse_record = db_tdb_parse;
452 result->get_seqnum = db_tdb_get_seqnum;
453 result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
454 result->transaction_start = db_tdb_transaction_start;
455 result->transaction_start_nonblock = db_tdb_transaction_start_nonblock;
456 result->transaction_commit = db_tdb_transaction_commit;
457 result->transaction_cancel = db_tdb_transaction_cancel;
458 result->exists = db_tdb_exists;
459 result->wipe = db_tdb_wipe;
460 result->id = db_tdb_id;
461 result->check = db_tdb_check;
462 result->name = tdb_name(db_tdb->wtdb->tdb);