1 /* init.c - initialize bdb backend */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2000-2006 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
20 #include <ac/string.h>
21 #include <ac/unistd.h>
22 #include <ac/stdlib.h>
30 static const struct bdbi_database {
35 } bdbi_databases[] = {
36 { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
37 { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
41 typedef void * db_malloc(size_t);
42 typedef void * db_realloc(void *, size_t);
45 bdb_db_init( BackendDB *be )
50 Debug( LDAP_DEBUG_TRACE,
51 LDAP_XSTRING(bdb_db_init) ": Initializing " BDB_UCTYPE " database\n",
54 /* allocate backend-database-specific stuff */
55 bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
57 /* DBEnv parameters */
58 bdb->bi_dbenv_home = ch_strdup( SLAPD_DEFAULT_DB_DIR );
59 bdb->bi_dbenv_xflags = 0;
60 bdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
62 bdb->bi_cache.c_maxsize = DEFAULT_CACHE_SIZE;
63 bdb->bi_cache.c_minfree = 1;
65 bdb->bi_lock_detect = DB_LOCK_DEFAULT;
66 bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
67 bdb->bi_search_stack = NULL;
69 ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
70 ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
72 ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
74 ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_head_mutex );
75 ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_tail_mutex );
76 ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
77 ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
78 ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
79 ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
82 be->be_cf_ocs = be->bd_info->bi_cf_ocs;
85 rc = bdb_monitor_init( be );
94 bdb_db_close( BackendDB *be );
97 bdb_db_open( BackendDB *be )
100 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
101 struct stat stat1, stat2;
103 char path[MAXPATHLEN];
105 int do_recover = 0, do_alock_recover = 0;
106 int alockt, quick = 0;
108 if ( be->be_suffix == NULL ) {
109 Debug( LDAP_DEBUG_ANY,
110 "bdb_db_open: need suffix\n",
115 Debug( LDAP_DEBUG_ARGS,
117 be->be_suffix[0].bv_val, 0, 0 );
119 #ifndef BDB_MULTIPLE_SUFFIXES
120 if ( be->be_suffix[1].bv_val ) {
121 Debug( LDAP_DEBUG_ANY,
122 "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
127 /* Check existence of dbenv_home. Any error means trouble */
128 rc = stat( bdb->bi_dbenv_home, &stat1 );
130 Debug( LDAP_DEBUG_ANY,
131 "bdb_db_open: Cannot access database directory %s (%d)\n",
132 bdb->bi_dbenv_home, errno, 0 );
136 /* Perform database use arbitration/recovery logic */
137 alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
138 if ( slapMode & SLAP_TOOL_QUICK ) {
139 alockt |= ALOCK_NOSAVE;
143 rc = alock_open( &bdb->bi_alock_info,
145 bdb->bi_dbenv_home, alockt );
147 /* alockt is TRUE if the existing environment was created in Quick mode */
148 alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
151 if( rc == ALOCK_RECOVER ) {
152 Debug( LDAP_DEBUG_ANY,
153 "bdb_db_open: unclean shutdown detected;"
154 " attempting recovery.\n",
156 do_alock_recover = 1;
157 do_recover = DB_RECOVER;
158 } else if( rc == ALOCK_BUSY ) {
159 Debug( LDAP_DEBUG_ANY,
160 "bdb_db_open: database already in use\n",
163 } else if( rc != ALOCK_CLEAN ) {
164 Debug( LDAP_DEBUG_ANY,
165 "bdb_db_open: alock package is unstable\n",
171 * The DB_CONFIG file may have changed. If so, recover the
172 * database so that new settings are put into effect. Also
173 * note the possible absence of DB_CONFIG in the log.
175 if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
177 char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
178 *ptr++ = LDAP_DIRSEP[0];
179 strcpy( ptr, "__db.001" );
180 if( stat( path, &stat2 ) == 0 ) {
181 if( stat2.st_mtime < stat1.st_mtime ) {
182 Debug( LDAP_DEBUG_ANY,
183 "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
184 "Performing database recovery to activate new settings.\n",
185 be->be_suffix[0].bv_val, 0, 0 );
186 do_recover = DB_RECOVER;
192 Debug( LDAP_DEBUG_ANY,
193 "bdb_db_open: Warning - No DB_CONFIG file found "
194 "in directory %s: (%d)\n"
195 "Expect poor performance for suffix %s.\n",
196 bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
199 /* Always let slapcat run, regardless of environment state.
200 * This can be used to cause a cache flush after an unclean
203 if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
204 Debug( LDAP_DEBUG_ANY,
205 "bdb_db_open: Recovery skipped in read-only mode. "
206 "Run manual recovery if errors are encountered.\n",
212 /* An existing environment in Quick mode has nothing to recover. */
213 if ( alockt && do_recover ) {
214 Debug( LDAP_DEBUG_ANY,
215 "bdb_db_open: cannot recover, database must be reinitialized.\n",
221 rc = db_env_create( &bdb->bi_dbenv, 0 );
223 Debug( LDAP_DEBUG_ANY,
224 "bdb_db_open: db_env_create failed: %s (%d)\n",
225 db_strerror(rc), rc, 0 );
230 strcpy( path, bdb->bi_dbenv_home );
234 dbhome = bdb->bi_dbenv_home;
237 /* If existing environment is clean but doesn't support
238 * currently requested modes, remove it.
240 if ( !do_recover && ( alockt ^ quick )) {
241 rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
243 Debug( LDAP_DEBUG_ANY,
244 "bdb_db_open: dbenv remove failed: %s (%d)\n",
245 db_strerror(rc), rc, 0 );
246 bdb->bi_dbenv = NULL;
249 rc = db_env_create( &bdb->bi_dbenv, 0 );
251 Debug( LDAP_DEBUG_ANY,
252 "bdb_db_open: db_env_create failed: %s (%d)\n",
253 db_strerror(rc), rc, 0 );
258 bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
259 bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
261 bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
263 /* One long-lived TXN per thread, two TXNs per write op */
264 bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
266 if( bdb->bi_dbenv_xflags != 0 ) {
267 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
268 bdb->bi_dbenv_xflags, 1);
270 Debug( LDAP_DEBUG_ANY,
271 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
272 db_strerror(rc), rc, 0 );
277 #define BDB_TXN_FLAGS (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
279 Debug( LDAP_DEBUG_TRACE,
280 "bdb_db_open: dbenv_open(%s)\n",
281 bdb->bi_dbenv_home, 0, 0);
283 flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
286 flags |= BDB_TXN_FLAGS;
288 /* If a key was set, use shared memory for the BDB environment */
289 if ( bdb->bi_shm_key ) {
290 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
291 flags |= DB_SYSTEM_MEM;
293 rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
294 flags | do_recover, bdb->bi_dbenv_mode );
297 Debug( LDAP_DEBUG_ANY,
298 "bdb_db_open: Database cannot be %s, err %d. "
299 "Restore from backup!\n",
300 do_recover ? "recovered" : "opened", rc, 0);
304 if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
305 Debug( LDAP_DEBUG_ANY,
306 "bdb_db_open: alock_recover failed\n",
312 #ifdef SLAP_ZONE_ALLOC
313 if ( bdb->bi_cache.c_maxsize ) {
314 bdb->bi_cache.c_zctx = slap_zn_mem_create(
315 SLAP_ZONE_INITSIZE, SLAP_ZONE_MAXSIZE,
316 SLAP_ZONE_DELTA, SLAP_ZONE_SIZE);
320 if ( bdb->bi_idl_cache_max_size ) {
321 bdb->bi_idl_tree = NULL;
322 bdb->bi_idl_cache_size = 0;
325 flags = DB_THREAD | bdb->bi_db_opflags;
327 #ifdef DB_AUTO_COMMIT
329 flags |= DB_AUTO_COMMIT;
332 bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
333 BDB_INDICES * sizeof(struct bdb_db_info *) );
335 /* open (and create) main database */
336 for( i = 0; bdbi_databases[i].name; i++ ) {
337 struct bdb_db_info *db;
339 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
341 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
343 Debug( LDAP_DEBUG_ANY,
344 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
345 bdb->bi_dbenv_home, db_strerror(rc), rc );
349 if( i == BDB_ID2ENTRY ) {
350 if ( slapMode & SLAP_TOOL_MODE )
351 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
352 DB_PRIORITY_VERY_LOW );
354 rc = db->bdi_db->set_pagesize( db->bdi_db,
355 BDB_ID2ENTRY_PAGESIZE );
356 if ( slapMode & SLAP_TOOL_READMAIN ) {
362 rc = db->bdi_db->set_flags( db->bdi_db,
363 DB_DUP | DB_DUPSORT );
365 if ( slapMode & SLAP_TOOL_READONLY ) {
371 if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
377 rc = db->bdi_db->set_pagesize( db->bdi_db,
382 strcpy( path, bdbi_databases[i].file );
384 rc = DB_OPEN( db->bdi_db,
386 /* bdbi_databases[i].name, */ NULL,
387 bdbi_databases[i].type,
388 bdbi_databases[i].flags | flags,
389 bdb->bi_dbenv_mode );
391 rc = DB_OPEN( db->bdi_db,
392 bdbi_databases[i].file,
393 /* bdbi_databases[i].name, */ NULL,
394 bdbi_databases[i].type,
395 bdbi_databases[i].flags | flags,
396 bdb->bi_dbenv_mode );
400 char buf[SLAP_TEXT_BUFLEN];
402 snprintf( buf, sizeof(buf), "%s/%s",
403 bdb->bi_dbenv_home, bdbi_databases[i].file );
404 Debug( LDAP_DEBUG_ANY,
405 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
406 buf, db_strerror(rc), rc );
407 db->bdi_db->close( db->bdi_db, 0 );
411 flags &= ~(DB_CREATE | DB_RDONLY);
412 db->bdi_name = bdbi_databases[i].name;
413 bdb->bi_databases[i] = db;
416 bdb->bi_databases[i] = NULL;
417 bdb->bi_ndatabases = i;
420 rc = bdb_last_id( be, NULL );
422 Debug( LDAP_DEBUG_ANY,
423 "bdb_db_open: last_id(%s) failed: %s (%d)\n",
424 bdb->bi_dbenv_home, db_strerror(rc), rc );
429 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
434 rc = bdb_monitor_open( be );
440 bdb->bi_flags |= BDB_IS_OPEN;
442 entry_prealloc( bdb->bi_cache.c_maxsize );
443 attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
452 bdb_db_close( BackendDB *be )
455 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
456 struct bdb_db_info *db;
457 bdb_idl_cache_entry_t *entry, *next_entry;
460 /* monitor handling */
461 (void)bdb_monitor_close( be );
464 bdb->bi_flags &= ~BDB_IS_OPEN;
466 ber_bvarray_free( bdb->bi_db_config );
467 bdb->bi_db_config = NULL;
469 while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
470 db = bdb->bi_databases[bdb->bi_ndatabases];
471 rc = db->bdi_db->close( db->bdi_db, 0 );
472 /* Lower numbered names are not strdup'd */
473 if( bdb->bi_ndatabases >= BDB_NDB )
474 free( db->bdi_name );
477 free( bdb->bi_databases );
478 bdb->bi_databases = NULL;
480 bdb_cache_release_all (&bdb->bi_cache);
482 if ( bdb->bi_idl_cache_max_size ) {
483 avl_free( bdb->bi_idl_tree, NULL );
484 bdb->bi_idl_tree = NULL;
485 entry = bdb->bi_idl_lru_head;
486 while ( entry != NULL ) {
487 next_entry = entry->idl_lru_next;
490 free( entry->kstr.bv_val );
494 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
497 /* close db environment */
498 if( bdb->bi_dbenv ) {
499 /* Free cache locker if we enabled locking */
500 if ( !( slapMode & SLAP_TOOL_QUICK )) {
501 XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
502 bdb->bi_cache.c_locker = 0;
505 /* force a checkpoint, but not if we were ReadOnly,
506 * and not in Quick mode since there are no transactions there.
508 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
509 rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
511 Debug( LDAP_DEBUG_ANY,
512 "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
513 db_strerror(rc), rc, 0 );
517 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
518 bdb->bi_dbenv = NULL;
520 Debug( LDAP_DEBUG_ANY,
521 "bdb_db_close: close failed: %s (%d)\n",
522 db_strerror(rc), rc, 0 );
527 rc = alock_close( &bdb->bi_alock_info );
529 Debug( LDAP_DEBUG_ANY,
530 "bdb_db_close: alock_close failed\n", 0, 0, 0 );
538 bdb_db_destroy( BackendDB *be )
540 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
542 if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
543 if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
545 bdb_attr_index_destroy( bdb );
547 ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
548 ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_head_mutex );
549 ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_tail_mutex );
550 ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
552 ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
554 ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
555 ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
556 ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
557 ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
560 be->be_private = NULL;
571 static char *controls[] = {
573 LDAP_CONTROL_MANAGEDSAIT,
575 LDAP_CONTROL_PAGEDRESULTS,
576 LDAP_CONTROL_PRE_READ,
577 LDAP_CONTROL_POST_READ,
578 LDAP_CONTROL_SUBENTRIES,
579 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
581 LDAP_CONTROL_X_TXN_SPEC,
586 /* initialize the underlying database system */
587 Debug( LDAP_DEBUG_TRACE,
588 LDAP_XSTRING(bdb_back_initialize) ": initialize "
589 BDB_UCTYPE " backend\n", 0, 0, 0 );
592 SLAP_BFLAG_INCREMENT |
593 SLAP_BFLAG_SUBENTRIES |
595 SLAP_BFLAG_REFERRALS;
597 bi->bi_controls = controls;
599 { /* version check */
600 int major, minor, patch, ver;
601 char *version = db_version( &major, &minor, &patch );
605 /* All our stdio does an ASCII to EBCDIC conversion on
606 * the output. Strings from the BDB library are already
607 * in EBCDIC; we have to go back and forth...
609 strcpy( v2, version );
614 ver = (major << 24) | (minor << 16) | patch;
615 if( ver != DB_VERSION_FULL ) {
616 /* fail if a versions don't match */
617 Debug( LDAP_DEBUG_ANY,
618 LDAP_XSTRING(bdb_back_initialize) ": "
619 "BDB library version mismatch:"
620 " expected " DB_VERSION_STRING ","
621 " got %s\n", version, 0, 0 );
625 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
626 ": %s\n", version, 0, 0 );
629 db_env_set_func_free( ber_memfree );
630 db_env_set_func_malloc( (db_malloc *)ber_memalloc );
631 db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
633 /* This is a no-op on a NO_THREAD build. Leave the default
634 * alone so that BDB will sleep on interprocess conflicts.
636 db_env_set_func_yield( ldap_pvt_thread_yield );
644 bi->bi_db_init = bdb_db_init;
645 bi->bi_db_config = config_generic_wrapper;
646 bi->bi_db_open = bdb_db_open;
647 bi->bi_db_close = bdb_db_close;
648 bi->bi_db_destroy = bdb_db_destroy;
650 bi->bi_op_add = bdb_add;
651 bi->bi_op_bind = bdb_bind;
652 bi->bi_op_compare = bdb_compare;
653 bi->bi_op_delete = bdb_delete;
654 bi->bi_op_modify = bdb_modify;
655 bi->bi_op_modrdn = bdb_modrdn;
656 bi->bi_op_search = bdb_search;
658 bi->bi_op_unbind = 0;
660 bi->bi_extended = bdb_extended;
662 bi->bi_chk_referrals = bdb_referrals;
663 bi->bi_operational = bdb_operational;
664 bi->bi_has_subordinates = bdb_hasSubordinates;
665 bi->bi_entry_release_rw = bdb_entry_release;
666 bi->bi_entry_get_rw = bdb_entry_get;
669 * hooks for slap tools
671 bi->bi_tool_entry_open = bdb_tool_entry_open;
672 bi->bi_tool_entry_close = bdb_tool_entry_close;
673 bi->bi_tool_entry_first = bdb_tool_entry_next;
674 bi->bi_tool_entry_next = bdb_tool_entry_next;
675 bi->bi_tool_entry_get = bdb_tool_entry_get;
676 bi->bi_tool_entry_put = bdb_tool_entry_put;
677 bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
678 bi->bi_tool_sync = 0;
679 bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
680 bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
681 bi->bi_tool_entry_modify = bdb_tool_entry_modify;
683 bi->bi_connection_init = 0;
684 bi->bi_connection_destroy = 0;
688 * initialize monitor stuff
690 rc = bdb_monitor_initialize();
696 rc = bdb_back_init_cf( bi );
701 #if (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
702 (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
704 /* conditionally define the init_module() function */
706 SLAP_BACKEND_INIT_MODULE( hdb )
707 #else /* !BDB_HIER */
708 SLAP_BACKEND_INIT_MODULE( bdb )
709 #endif /* !BDB_HIER */
711 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */