git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/init.c

   1 /* init.c - initialize bdb backend */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2008 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  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>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21 #include <ac/unistd.h>
  22 #include <ac/stdlib.h>
  23 #include <ac/errno.h>
  24 #include <sys/stat.h>
  25 #include "back-bdb.h"
  26 #include <lutil.h>
  27 #include <ldap_rq.h>
  28 #include "alock.h"
  29
  30 static const struct bdbi_database {
  31         char *file;
  32         char *name;
  33         int type;
  34         int flags;
  35 } bdbi_databases[] = {
  36         { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
  37         { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
  38         { NULL, NULL, 0, 0 }
  39 };
  40
  41 typedef void * db_malloc(size_t);
  42 typedef void * db_realloc(void *, size_t);
  43
  44 #define bdb_db_init     BDB_SYMBOL(db_init)
  45 #define bdb_db_open     BDB_SYMBOL(db_open)
  46 #define bdb_db_close    BDB_SYMBOL(db_close)
  47
  48 static int
  49 bdb_db_init( BackendDB *be )
  50 {
  51         struct bdb_info *bdb;
  52
  53         Debug( LDAP_DEBUG_TRACE,
  54                 LDAP_XSTRING(bdb_db_init) ": Initializing " BDB_UCTYPE " database\n",
  55                 0, 0, 0 );
  56
  57         /* allocate backend-database-specific stuff */
  58         bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
  59
  60         /* DBEnv parameters */
  61         bdb->bi_dbenv_home = ch_strdup( SLAPD_DEFAULT_DB_DIR );
  62         bdb->bi_dbenv_xflags = 0;
  63         bdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
  64
  65         bdb->bi_cache.c_maxsize = DEFAULT_CACHE_SIZE;
  66         bdb->bi_cache.c_minfree = 1;
  67
  68         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  69         bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
  70         bdb->bi_search_stack = NULL;
  71
  72         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  73         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  74 #ifdef BDB_HIER
  75         ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
  76 #endif
  77         ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_head_mutex );
  78         ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_tail_mutex );
  79         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
  80         ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
  81         ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
  82         ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
  83
  84         be->be_private = bdb;
  85         be->be_cf_ocs = be->bd_info->bi_cf_ocs;
  86
  87         return 0;
  88 }
  89
  90 static int
  91 bdb_db_close( BackendDB *be );
  92
  93 static int
  94 bdb_db_open( BackendDB *be )
  95 {
  96         int rc, i;
  97         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  98         struct stat stat1, stat2;
  99         u_int32_t flags;
 100         char path[MAXPATHLEN];
 101         char *dbhome;
 102         int do_recover = 0, do_alock_recover = 0, open_env = 1;
 103         int alockt, quick = 0;
 104
 105         if ( be->be_suffix == NULL ) {
 106                 Debug( LDAP_DEBUG_ANY,
 107                         LDAP_XSTRING(bdb_db_open) ": need suffix\n",
 108                         0, 0, 0 );
 109                 return -1;
 110         }
 111
 112         Debug( LDAP_DEBUG_ARGS,
 113                 LDAP_XSTRING(bdb_db_open) ": %s\n",
 114                 be->be_suffix[0].bv_val, 0, 0 );
 115
 116 #ifndef BDB_MULTIPLE_SUFFIXES
 117         if ( be->be_suffix[1].bv_val ) {
 118         Debug( LDAP_DEBUG_ANY,
 119                 LDAP_XSTRING(bdb_db_open) ": only one suffix allowed\n", 0, 0, 0 );
 120                 return -1;
 121         }
 122 #endif
 123
 124         /* Check existence of dbenv_home. Any error means trouble */
 125         rc = stat( bdb->bi_dbenv_home, &stat1 );
 126         if( rc !=0 ) {
 127                 Debug( LDAP_DEBUG_ANY,
 128                         LDAP_XSTRING(bdb_db_open) ": Cannot access database directory %s (%d)\n",
 129                         bdb->bi_dbenv_home, errno, 0 );
 130                         return -1;
 131         }
 132
 133         /* Perform database use arbitration/recovery logic */
 134         alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
 135         if ( slapMode & SLAP_TOOL_QUICK ) {
 136                 alockt |= ALOCK_NOSAVE;
 137                 quick = 1;
 138         }
 139
 140         rc = alock_open( &bdb->bi_alock_info,
 141                                 "slapd",
 142                                 bdb->bi_dbenv_home, alockt );
 143
 144         /* alockt is TRUE if the existing environment was created in Quick mode */
 145         alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
 146         rc &= ~ALOCK_NOSAVE;
 147
 148         if( rc == ALOCK_RECOVER ) {
 149                 Debug( LDAP_DEBUG_ANY,
 150                         LDAP_XSTRING(bdb_db_open) ": unclean shutdown detected;"
 151                         " attempting recovery.\n",
 152                         0, 0, 0 );
 153                 do_alock_recover = 1;
 154                 do_recover = DB_RECOVER;
 155         } else if( rc == ALOCK_BUSY ) {
 156                 Debug( LDAP_DEBUG_ANY,
 157                         LDAP_XSTRING(bdb_db_open) ": database already in use\n",
 158                         0, 0, 0 );
 159                 return -1;
 160         } else if( rc != ALOCK_CLEAN ) {
 161                 Debug( LDAP_DEBUG_ANY,
 162                         LDAP_XSTRING(bdb_db_open) ": alock package is unstable\n",
 163                         0, 0, 0 );
 164                 return -1;
 165         }
 166
 167         /*
 168          * The DB_CONFIG file may have changed. If so, recover the
 169          * database so that new settings are put into effect. Also
 170          * note the possible absence of DB_CONFIG in the log.
 171          */
 172         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 173                 if ( !do_recover ) {
 174                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 175                         *ptr++ = LDAP_DIRSEP[0];
 176                         strcpy( ptr, "__db.001" );
 177                         if( stat( path, &stat2 ) == 0 ) {
 178                                 if( stat2.st_mtime < stat1.st_mtime ) {
 179                                         Debug( LDAP_DEBUG_ANY,
 180                                                 LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix %s has changed.\n"
 181                                                 "Performing database recovery to activate new settings.\n",
 182                                                 be->be_suffix[0].bv_val, 0, 0 );
 183                                         do_recover = DB_RECOVER;
 184                                 }
 185                         }
 186                 }
 187         }
 188         else {
 189                 Debug( LDAP_DEBUG_ANY,
 190                         LDAP_XSTRING(bdb_db_open) ": Warning - No DB_CONFIG file found "
 191                         "in directory %s: (%d)\n"
 192                         "Expect poor performance for suffix %s.\n",
 193                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 194         }
 195
 196         /* Always let slapcat run, regardless of environment state.
 197          * This can be used to cause a cache flush after an unclean
 198          * shutdown.
 199          */
 200         if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
 201                 Debug( LDAP_DEBUG_ANY,
 202                         LDAP_XSTRING(bdb_db_open) ": Recovery skipped in read-only mode. "
 203                         "Run manual recovery if errors are encountered.\n",
 204                         0, 0, 0 );
 205                 do_recover = 0;
 206                 quick = alockt;
 207         }
 208
 209         /* An existing environment in Quick mode has nothing to recover. */
 210         if ( alockt && do_recover ) {
 211                 Debug( LDAP_DEBUG_ANY,
 212                         LDAP_XSTRING(bdb_db_open) ": cannot recover, database must be reinitialized.\n",
 213                         0, 0, 0 );
 214                 rc = -1;
 215                 goto fail;
 216         }
 217
 218         rc = db_env_create( &bdb->bi_dbenv, 0 );
 219         if( rc != 0 ) {
 220                 Debug( LDAP_DEBUG_ANY,
 221                         LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 222                         db_strerror(rc), rc, 0 );
 223                 goto fail;
 224         }
 225
 226 #ifdef HAVE_EBCDIC
 227         strcpy( path, bdb->bi_dbenv_home );
 228         __atoe( path );
 229         dbhome = path;
 230 #else
 231         dbhome = bdb->bi_dbenv_home;
 232 #endif
 233
 234         /* If existing environment is clean but doesn't support
 235          * currently requested modes, remove it.
 236          */
 237         if ( !do_recover && ( alockt ^ quick )) {
 238 shm_retry:
 239                 rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
 240                 if ( rc ) {
 241                         Debug( LDAP_DEBUG_ANY,
 242                                 LDAP_XSTRING(bdb_db_open) ": dbenv remove failed: %s (%d)\n",
 243                                 db_strerror(rc), rc, 0 );
 244                         bdb->bi_dbenv = NULL;
 245                         goto fail;
 246                 }
 247                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 248                 if( rc != 0 ) {
 249                         Debug( LDAP_DEBUG_ANY,
 250                                 LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 251                                 db_strerror(rc), rc, 0 );
 252                         goto fail;
 253                 }
 254         }
 255
 256         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 257         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 258
 259         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 260
 261         /* One long-lived TXN per thread, two TXNs per write op */
 262         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 263
 264         if( bdb->bi_dbenv_xflags != 0 ) {
 265                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 266                         bdb->bi_dbenv_xflags, 1);
 267                 if( rc != 0 ) {
 268                         Debug( LDAP_DEBUG_ANY,
 269                                 LDAP_XSTRING(bdb_db_open) ": dbenv_set_flags failed: %s (%d)\n",
 270                                 db_strerror(rc), rc, 0 );
 271                         goto fail;
 272                 }
 273         }
 274
 275 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 276
 277         Debug( LDAP_DEBUG_TRACE,
 278                 LDAP_XSTRING(bdb_db_open) ": dbenv_open(%s)\n",
 279                 bdb->bi_dbenv_home, 0, 0);
 280
 281         flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
 282
 283         if ( !quick )
 284                 flags |= BDB_TXN_FLAGS;
 285
 286         /* If a key was set, use shared memory for the BDB environment */
 287         if ( bdb->bi_shm_key ) {
 288                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 289                 flags |= DB_SYSTEM_MEM;
 290         }
 291         rc = (bdb->bi_dbenv->open)( bdb->bi_dbenv, dbhome,
 292                         flags | do_recover, bdb->bi_dbenv_mode );
 293
 294         if ( rc ) {
 295                 /* Regular open failed, probably a missing shm environment.
 296                  * Start over, do a recovery.
 297                  */
 298                 if ( !do_recover && bdb->bi_shm_key ) {
 299                         bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 300                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 301                         if( rc == 0 ) {
 302                                 Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
 303                                         ": Shared memory env open failed, assuming stale env\n",
 304                                         0, 0, 0 );
 305                                 goto shm_retry;
 306                         }
 307                 }
 308                 Debug( LDAP_DEBUG_ANY,
 309                         LDAP_XSTRING(bdb_db_open) ": Database cannot be %s, err %d. "
 310                         "Restore from backup!\n",
 311                                 do_recover ? "recovered" : "opened", rc, 0);
 312                 goto fail;
 313         }
 314
 315         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 316                 Debug( LDAP_DEBUG_ANY,
 317                         LDAP_XSTRING(bdb_db_open) ": alock_recover failed\n",
 318                         0, 0, 0 );
 319                 rc = -1;
 320                 goto fail;
 321         }
 322
 323 #ifdef SLAP_ZONE_ALLOC
 324         if ( bdb->bi_cache.c_maxsize ) {
 325                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 326                                                                 SLAP_ZONE_INITSIZE,
 327                                                                 SLAP_ZONE_MAXSIZE,
 328                                                                 SLAP_ZONE_DELTA,
 329                                                                 SLAP_ZONE_SIZE);
 330         }
 331 #endif
 332
 333         if ( bdb->bi_idl_cache_max_size ) {
 334                 bdb->bi_idl_tree = NULL;
 335                 bdb->bi_idl_cache_size = 0;
 336         }
 337
 338         flags = DB_THREAD | bdb->bi_db_opflags;
 339
 340 #ifdef DB_AUTO_COMMIT
 341         if ( !quick )
 342                 flags |= DB_AUTO_COMMIT;
 343 #endif
 344
 345         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 346                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 347
 348         /* open (and create) main database */
 349         for( i = 0; bdbi_databases[i].name; i++ ) {
 350                 struct bdb_db_info *db;
 351
 352                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 353
 354                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 355                 if( rc != 0 ) {
 356                         Debug( LDAP_DEBUG_ANY,
 357                                 LDAP_XSTRING(bdb_db_open) ": db_create(%s) failed: %s (%d)\n",
 358                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 359                         goto fail;
 360                 }
 361
 362                 if( i == BDB_ID2ENTRY ) {
 363                         if ( slapMode & SLAP_TOOL_MODE )
 364                                 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 365                                         DB_PRIORITY_VERY_LOW );
 366
 367                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 368                                 BDB_ID2ENTRY_PAGESIZE );
 369                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 370                                 flags |= DB_RDONLY;
 371                         } else {
 372                                 flags |= DB_CREATE;
 373                         }
 374                 } else {
 375                         rc = db->bdi_db->set_flags( db->bdi_db,
 376                                 DB_DUP | DB_DUPSORT );
 377 #ifndef BDB_HIER
 378                         if ( slapMode & SLAP_TOOL_READONLY ) {
 379                                 flags |= DB_RDONLY;
 380                         } else {
 381                                 flags |= DB_CREATE;
 382                         }
 383 #else
 384                         rc = db->bdi_db->set_dup_compare( db->bdi_db,
 385                                 bdb_dup_compare );
 386                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 387                                 flags |= DB_RDONLY;
 388                         } else {
 389                                 flags |= DB_CREATE;
 390                         }
 391 #endif
 392                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 393                                 BDB_PAGESIZE );
 394                 }
 395
 396 #ifdef HAVE_EBCDIC
 397                 strcpy( path, bdbi_databases[i].file );
 398                 __atoe( path );
 399                 rc = DB_OPEN( db->bdi_db,
 400                         path,
 401                 /*      bdbi_databases[i].name, */ NULL,
 402                         bdbi_databases[i].type,
 403                         bdbi_databases[i].flags | flags,
 404                         bdb->bi_dbenv_mode );
 405 #else
 406                 rc = DB_OPEN( db->bdi_db,
 407                         bdbi_databases[i].file,
 408                 /*      bdbi_databases[i].name, */ NULL,
 409                         bdbi_databases[i].type,
 410                         bdbi_databases[i].flags | flags,
 411                         bdb->bi_dbenv_mode );
 412 #endif
 413
 414                 if ( rc != 0 ) {
 415                         char    buf[SLAP_TEXT_BUFLEN];
 416
 417                         snprintf( buf, sizeof(buf), "%s/%s",
 418                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 419                         Debug( LDAP_DEBUG_ANY,
 420                                 LDAP_XSTRING(bdb_db_open) ": db_open(%s) failed: %s (%d)\n",
 421                                 buf, db_strerror(rc), rc );
 422                         db->bdi_db->close( db->bdi_db, 0 );
 423                         goto fail;
 424                 }
 425
 426                 flags &= ~(DB_CREATE | DB_RDONLY);
 427                 db->bdi_name = bdbi_databases[i].name;
 428                 bdb->bi_databases[i] = db;
 429         }
 430
 431         bdb->bi_databases[i] = NULL;
 432         bdb->bi_ndatabases = i;
 433
 434         /* get nextid */
 435         rc = bdb_last_id( be, NULL );
 436         if( rc != 0 ) {
 437                 Debug( LDAP_DEBUG_ANY,
 438                         LDAP_XSTRING(bdb_db_open) ": last_id(%s) failed: %s (%d)\n",
 439                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 440                 goto fail;
 441         }
 442
 443         if ( !quick ) {
 444                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 445         }
 446
 447         bdb->bi_flags |= BDB_IS_OPEN;
 448
 449         return 0;
 450
 451 fail:
 452         bdb_db_close( be );
 453         return rc;
 454 }
 455
 456 static int
 457 bdb_db_close( BackendDB *be )
 458 {
 459         int rc;
 460         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 461         struct bdb_db_info *db;
 462         bdb_idl_cache_entry_t *entry, *next_entry;
 463
 464         bdb->bi_flags &= ~BDB_IS_OPEN;
 465
 466         ber_bvarray_free( bdb->bi_db_config );
 467         bdb->bi_db_config = NULL;
 468
 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 );
 475                 free( db );
 476         }
 477         free( bdb->bi_databases );
 478         bdb->bi_databases = NULL;
 479
 480         bdb_cache_release_all (&bdb->bi_cache);
 481
 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;
 488                         if ( entry->idl )
 489                                 free( entry->idl );
 490                         free( entry->kstr.bv_val );
 491                         free( entry );
 492                         entry = next_entry;
 493                 }
 494                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 495         }
 496
 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;
 503                 }
 504 #ifdef BDB_REUSE_LOCKERS
 505                 bdb_locker_flush( bdb->bi_dbenv );
 506 #endif
 507                 /* force a checkpoint, but not if we were ReadOnly,
 508                  * and not in Quick mode since there are no transactions there.
 509                  */
 510                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 511                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 512                         if( rc != 0 ) {
 513                                 Debug( LDAP_DEBUG_ANY,
 514                                         "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
 515                                         db_strerror(rc), rc, 0 );
 516                         }
 517                 }
 518
 519                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 520                 bdb->bi_dbenv = NULL;
 521                 if( rc != 0 ) {
 522                         Debug( LDAP_DEBUG_ANY,
 523                                 "bdb_db_close: close failed: %s (%d)\n",
 524                                 db_strerror(rc), rc, 0 );
 525                         return rc;
 526                 }
 527         }
 528
 529         rc = alock_close( &bdb->bi_alock_info );
 530         if( rc != 0 ) {
 531                 Debug( LDAP_DEBUG_ANY,
 532                         "bdb_db_close: alock_close failed\n", 0, 0, 0 );
 533                 return -1;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int
 540 bdb_db_destroy( BackendDB *be )
 541 {
 542         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 543
 544         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 545         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 546
 547         bdb_attr_index_destroy( bdb );
 548
 549         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 550         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_head_mutex );
 551         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_tail_mutex );
 552         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 553 #ifdef BDB_HIER
 554         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 555 #endif
 556         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 557         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 558         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 559         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 560
 561         ch_free( bdb );
 562         be->be_private = NULL;
 563
 564         return 0;
 565 }
 566
 567 int
 568 bdb_back_initialize(
 569         BackendInfo     *bi )
 570 {
 571         int rc;
 572
 573         static char *controls[] = {
 574                 LDAP_CONTROL_ASSERT,
 575                 LDAP_CONTROL_MANAGEDSAIT,
 576                 LDAP_CONTROL_NOOP,
 577                 LDAP_CONTROL_PAGEDRESULTS,
 578                 LDAP_CONTROL_PRE_READ,
 579                 LDAP_CONTROL_POST_READ,
 580                 LDAP_CONTROL_SUBENTRIES,
 581                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 582                 NULL
 583         };
 584
 585         /* initialize the underlying database system */
 586         Debug( LDAP_DEBUG_TRACE,
 587                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 588                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 589
 590         bi->bi_flags |=
 591                 SLAP_BFLAG_INCREMENT |
 592                 SLAP_BFLAG_SUBENTRIES |
 593                 SLAP_BFLAG_ALIASES |
 594                 SLAP_BFLAG_REFERRALS;
 595
 596         bi->bi_controls = controls;
 597
 598         {       /* version check */
 599                 int major, minor, patch, ver;
 600                 char *version = db_version( &major, &minor, &patch );
 601 #ifdef HAVE_EBCDIC
 602                 char v2[1024];
 603
 604                 /* All our stdio does an ASCII to EBCDIC conversion on
 605                  * the output. Strings from the BDB library are already
 606                  * in EBCDIC; we have to go back and forth...
 607                  */
 608                 strcpy( v2, version );
 609                 __etoa( v2 );
 610                 version = v2;
 611 #endif
 612
 613                 ver = (major << 24) | (minor << 16) | patch;
 614                 if( ver != DB_VERSION_FULL ) {
 615                         /* fail if a versions don't match */
 616                         Debug( LDAP_DEBUG_ANY,
 617                                 LDAP_XSTRING(bdb_back_initialize) ": "
 618                                 "BDB library version mismatch:"
 619                                 " expected " DB_VERSION_STRING ","
 620                                 " got %s\n", version, 0, 0 );
 621                         return -1;
 622                 }
 623
 624                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 625                         ": %s\n", version, 0, 0 );
 626         }
 627
 628         db_env_set_func_free( ber_memfree );
 629         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 630         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 631 #ifndef NO_THREAD
 632         /* This is a no-op on a NO_THREAD build. Leave the default
 633          * alone so that BDB will sleep on interprocess conflicts.
 634          */
 635         db_env_set_func_yield( ldap_pvt_thread_yield );
 636 #endif
 637
 638         bi->bi_open = 0;
 639         bi->bi_close = 0;
 640         bi->bi_config = 0;
 641         bi->bi_destroy = 0;
 642
 643         bi->bi_db_init = bdb_db_init;
 644         bi->bi_db_config = config_generic_wrapper;
 645         bi->bi_db_open = bdb_db_open;
 646         bi->bi_db_close = bdb_db_close;
 647         bi->bi_db_destroy = bdb_db_destroy;
 648
 649         bi->bi_op_add = bdb_add;
 650         bi->bi_op_bind = bdb_bind;
 651         bi->bi_op_compare = bdb_compare;
 652         bi->bi_op_delete = bdb_delete;
 653         bi->bi_op_modify = bdb_modify;
 654         bi->bi_op_modrdn = bdb_modrdn;
 655         bi->bi_op_search = bdb_search;
 656
 657         bi->bi_op_unbind = 0;
 658
 659         bi->bi_extended = bdb_extended;
 660
 661         bi->bi_chk_referrals = bdb_referrals;
 662         bi->bi_operational = bdb_operational;
 663         bi->bi_has_subordinates = bdb_hasSubordinates;
 664         bi->bi_entry_release_rw = bdb_entry_release;
 665         bi->bi_entry_get_rw = bdb_entry_get;
 666
 667         /*
 668          * hooks for slap tools
 669          */
 670         bi->bi_tool_entry_open = bdb_tool_entry_open;
 671         bi->bi_tool_entry_close = bdb_tool_entry_close;
 672         bi->bi_tool_entry_first = bdb_tool_entry_next;
 673         bi->bi_tool_entry_next = bdb_tool_entry_next;
 674         bi->bi_tool_entry_get = bdb_tool_entry_get;
 675         bi->bi_tool_entry_put = bdb_tool_entry_put;
 676         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 677         bi->bi_tool_sync = 0;
 678         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 679         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 680         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 681
 682         bi->bi_connection_init = 0;
 683         bi->bi_connection_destroy = 0;
 684
 685         rc = bdb_back_init_cf( bi );
 686
 687         return rc;
 688 }
 689
 690 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 691         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 692
 693 /* conditionally define the init_module() function */
 694 #ifdef BDB_HIER
 695 SLAP_BACKEND_INIT_MODULE( hdb )
 696 #else /* !BDB_HIER */
 697 SLAP_BACKEND_INIT_MODULE( bdb )
 698 #endif /* !BDB_HIER */
 699
 700 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 701