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 2000-2007 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 #include "config.h"
  30
  31 static const struct bdbi_database {
  32         char *file;
  33         char *name;
  34         int type;
  35         int flags;
  36 } bdbi_databases[] = {
  37         { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
  38         { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
  39         { NULL, NULL, 0, 0 }
  40 };
  41
  42 typedef void * db_malloc(size_t);
  43 typedef void * db_realloc(void *, size_t);
  44
  45 #define bdb_db_init     BDB_SYMBOL(db_init)
  46 #define bdb_db_open BDB_SYMBOL(db_open)
  47 #define bdb_db_close BDB_SYMBOL(db_close)
  48
  49 static int
  50 bdb_db_init( BackendDB *be, ConfigArgs *ca )
  51 {
  52         struct bdb_info *bdb;
  53         int rc;
  54
  55         Debug( LDAP_DEBUG_TRACE,
  56                 LDAP_XSTRING(bdb_db_init) ": Initializing " BDB_UCTYPE " database\n",
  57                 0, 0, 0 );
  58
  59         /* allocate backend-database-specific stuff */
  60         bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
  61
  62         /* DBEnv parameters */
  63         bdb->bi_dbenv_home = ch_strdup( SLAPD_DEFAULT_DB_DIR );
  64         bdb->bi_dbenv_xflags = 0;
  65         bdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
  66
  67         bdb->bi_cache.c_maxsize = DEFAULT_CACHE_SIZE;
  68         bdb->bi_cache.c_minfree = 1;
  69
  70         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  71         bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
  72         bdb->bi_search_stack = NULL;
  73
  74         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  75         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  76 #ifdef BDB_HIER
  77         ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
  78 #endif
  79         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_lru_mutex );
  80         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_count_mutex );
  81         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_eifree_mutex );
  82         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
  83         ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
  84         ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
  85         ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
  86
  87
  88         be->be_private = bdb;
  89         be->be_cf_ocs = be->bd_info->bi_cf_ocs;
  90
  91         rc = bdb_monitor_db_init( be );
  92
  93         return rc;
  94 }
  95
  96 static int
  97 bdb_db_close( BackendDB *be, ConfigArgs *ca );
  98
  99 static int
 100 bdb_db_open( BackendDB *be, ConfigArgs *ca )
 101 {
 102         int rc, i;
 103         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 104         struct stat stat1, stat2;
 105         u_int32_t flags;
 106         char path[MAXPATHLEN];
 107         char *dbhome;
 108         Entry *e = NULL;
 109         int do_recover = 0, do_alock_recover = 0;
 110         int alockt, quick = 0;
 111
 112         if ( be->be_suffix == NULL ) {
 113                 Debug( LDAP_DEBUG_ANY,
 114                         LDAP_XSTRING(bdb_db_open) ": need suffix\n",
 115                         1, 0, 0 );
 116                 return -1;
 117         }
 118
 119         Debug( LDAP_DEBUG_ARGS,
 120                 LDAP_XSTRING(bdb_db_open) ": %s\n",
 121                 be->be_suffix[0].bv_val, 0, 0 );
 122
 123 #ifndef BDB_MULTIPLE_SUFFIXES
 124         if ( be->be_suffix[1].bv_val ) {
 125                 Debug( LDAP_DEBUG_ANY,
 126                         LDAP_XSTRING(bdb_db_open) ": only one suffix allowed\n", 0, 0, 0 );
 127                 return -1;
 128         }
 129 #endif
 130
 131         /* Check existence of dbenv_home. Any error means trouble */
 132         rc = stat( bdb->bi_dbenv_home, &stat1 );
 133         if( rc !=0 ) {
 134                 Debug( LDAP_DEBUG_ANY,
 135                         LDAP_XSTRING(bdb_db_open) ": Cannot access database directory %s (%d)\n",
 136                         bdb->bi_dbenv_home, errno, 0 );
 137                 return -1;
 138         }
 139
 140         /* Perform database use arbitration/recovery logic */
 141         alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
 142         if ( slapMode & SLAP_TOOL_QUICK ) {
 143                 alockt |= ALOCK_NOSAVE;
 144                 quick = 1;
 145         }
 146
 147         rc = alock_open( &bdb->bi_alock_info,
 148                                 "slapd",
 149                                 bdb->bi_dbenv_home, alockt );
 150
 151         /* alockt is TRUE if the existing environment was created in Quick mode */
 152         alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
 153         rc &= ~ALOCK_NOSAVE;
 154
 155         if( rc == ALOCK_RECOVER ) {
 156                 Debug( LDAP_DEBUG_ANY,
 157                         LDAP_XSTRING(bdb_db_open) ": unclean shutdown detected;"
 158                         " attempting recovery.\n",
 159                         0, 0, 0 );
 160                 do_alock_recover = 1;
 161                 do_recover = DB_RECOVER;
 162         } else if( rc == ALOCK_BUSY ) {
 163                 Debug( LDAP_DEBUG_ANY,
 164                         LDAP_XSTRING(bdb_db_open) ": database already in use\n",
 165                         0, 0, 0 );
 166                 return -1;
 167         } else if( rc != ALOCK_CLEAN ) {
 168                 Debug( LDAP_DEBUG_ANY,
 169                         LDAP_XSTRING(bdb_db_open) ": alock package is unstable\n",
 170                         0, 0, 0 );
 171                 return -1;
 172         }
 173
 174         /*
 175          * The DB_CONFIG file may have changed. If so, recover the
 176          * database so that new settings are put into effect. Also
 177          * note the possible absence of DB_CONFIG in the log.
 178          */
 179         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 180                 if ( !do_recover ) {
 181                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 182                         *ptr++ = LDAP_DIRSEP[0];
 183                         strcpy( ptr, "__db.001" );
 184                         if( stat( path, &stat2 ) == 0 ) {
 185                                 if( stat2.st_mtime < stat1.st_mtime ) {
 186                                         Debug( LDAP_DEBUG_ANY,
 187                                                 LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix %s has changed.\n"
 188                                                 "Performing database recovery to activate new settings.\n",
 189                                                 be->be_suffix[0].bv_val, 0, 0 );
 190                                         do_recover = DB_RECOVER;
 191                                 }
 192                         }
 193                 }
 194         }
 195         else {
 196                 Debug( LDAP_DEBUG_ANY,
 197                         LDAP_XSTRING(bdb_db_open) ": Warning - No DB_CONFIG file found "
 198                         "in directory %s: (%d)\n"
 199                         "Expect poor performance for suffix %s.\n",
 200                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 201         }
 202
 203         /* Always let slapcat run, regardless of environment state.
 204          * This can be used to cause a cache flush after an unclean
 205          * shutdown.
 206          */
 207         if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
 208                 Debug( LDAP_DEBUG_ANY,
 209                         LDAP_XSTRING(bdb_db_open) ": Recovery skipped in read-only mode. "
 210                         "Run manual recovery if errors are encountered.\n",
 211                         0, 0, 0 );
 212                 do_recover = 0;
 213                 quick = alockt;
 214         }
 215
 216         /* An existing environment in Quick mode has nothing to recover. */
 217         if ( alockt && do_recover ) {
 218                 Debug( LDAP_DEBUG_ANY,
 219                         LDAP_XSTRING(bdb_db_open) ": cannot recover, database must be reinitialized.\n",
 220                         0, 0, 0 );
 221                 rc = -1;
 222                 goto fail;
 223         }
 224
 225         rc = db_env_create( &bdb->bi_dbenv, 0 );
 226         if( rc != 0 ) {
 227                 Debug( LDAP_DEBUG_ANY,
 228                         LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 229                         db_strerror(rc), rc, 0 );
 230                 goto fail;
 231         }
 232
 233 #ifdef HAVE_EBCDIC
 234         strcpy( path, bdb->bi_dbenv_home );
 235         __atoe( path );
 236         dbhome = path;
 237 #else
 238         dbhome = bdb->bi_dbenv_home;
 239 #endif
 240
 241         /* If existing environment is clean but doesn't support
 242          * currently requested modes, remove it.
 243          */
 244         if ( !do_recover && ( alockt ^ quick )) {
 245 shm_retry:
 246                 rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
 247                 if ( rc ) {
 248                         Debug( LDAP_DEBUG_ANY,
 249                                 LDAP_XSTRING(bdb_db_open) ": dbenv remove failed: %s (%d)\n",
 250                                 db_strerror(rc), rc, 0 );
 251                         bdb->bi_dbenv = NULL;
 252                         goto fail;
 253                 }
 254                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 255                 if( rc != 0 ) {
 256                         Debug( LDAP_DEBUG_ANY,
 257                                 LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 258                                 db_strerror(rc), rc, 0 );
 259                         goto fail;
 260                 }
 261         }
 262
 263         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 264         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 265
 266         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 267
 268         /* One long-lived TXN per thread, two TXNs per write op */
 269         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 270
 271         if( bdb->bi_dbenv_xflags != 0 ) {
 272                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 273                         bdb->bi_dbenv_xflags, 1);
 274                 if( rc != 0 ) {
 275                         Debug( LDAP_DEBUG_ANY,
 276                                 LDAP_XSTRING(bdb_db_open) ": dbenv_set_flags failed: %s (%d)\n",
 277                                 db_strerror(rc), rc, 0 );
 278                         goto fail;
 279                 }
 280         }
 281
 282 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 283
 284         Debug( LDAP_DEBUG_TRACE,
 285                 LDAP_XSTRING(bdb_db_open) ": dbenv_open(%s)\n",
 286                 bdb->bi_dbenv_home, 0, 0);
 287
 288         flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
 289
 290         if ( !quick )
 291                 flags |= BDB_TXN_FLAGS;
 292
 293         /* If a key was set, use shared memory for the BDB environment */
 294         if ( bdb->bi_shm_key ) {
 295                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 296                 flags |= DB_SYSTEM_MEM;
 297         }
 298         rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 299                         flags | do_recover, bdb->bi_dbenv_mode );
 300
 301         if ( rc ) {
 302                 /* Regular open faied, probably a missing shm environment.
 303                  * Start over, do a recovery.
 304                  */
 305                 if ( !do_recover && bdb->bi_shm_key ) {
 306                         bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 307                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 308                         if( rc == 0 ) {
 309                                 Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
 310                                         ": Shared memory env open failed, assuming stale env\n",
 311                                         0, 0, 0 );
 312                                 goto shm_retry;
 313                         }
 314                 }
 315                 Debug( LDAP_DEBUG_ANY,
 316                         LDAP_XSTRING(bdb_db_open) ": Database cannot be %s, err %d. "
 317                         "Restore from backup!\n",
 318                                 do_recover ? "recovered" : "opened", rc, 0);
 319                 goto fail;
 320         }
 321
 322         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 323                 Debug( LDAP_DEBUG_ANY,
 324                         LDAP_XSTRING(bdb_db_open) ": alock_recover failed\n",
 325                         0, 0, 0 );
 326                 rc = -1;
 327                 goto fail;
 328         }
 329
 330 #ifdef SLAP_ZONE_ALLOC
 331         if ( bdb->bi_cache.c_maxsize ) {
 332                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 333                         SLAP_ZONE_INITSIZE, SLAP_ZONE_MAXSIZE,
 334                         SLAP_ZONE_DELTA, SLAP_ZONE_SIZE);
 335         }
 336 #endif
 337
 338         if ( bdb->bi_idl_cache_max_size ) {
 339                 bdb->bi_idl_tree = NULL;
 340                 bdb->bi_idl_cache_size = 0;
 341         }
 342
 343         flags = DB_THREAD | bdb->bi_db_opflags;
 344
 345 #ifdef DB_AUTO_COMMIT
 346         if ( !quick )
 347                 flags |= DB_AUTO_COMMIT;
 348 #endif
 349
 350         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 351                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 352
 353         /* open (and create) main database */
 354         for( i = 0; bdbi_databases[i].name; i++ ) {
 355                 struct bdb_db_info *db;
 356
 357                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 358
 359                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 360                 if( rc != 0 ) {
 361                         Debug( LDAP_DEBUG_ANY,
 362                                 LDAP_XSTRING(bdb_db_open) ": db_create(%s) failed: %s (%d)\n",
 363                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 364                         goto fail;
 365                 }
 366
 367                 if( i == BDB_ID2ENTRY ) {
 368                         if ( slapMode & SLAP_TOOL_MODE )
 369                                 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 370                                         DB_PRIORITY_VERY_LOW );
 371
 372                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 373                                 BDB_ID2ENTRY_PAGESIZE );
 374                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 375                                 flags |= DB_RDONLY;
 376                         } else {
 377                                 flags |= DB_CREATE;
 378                         }
 379                 } else {
 380                         rc = db->bdi_db->set_flags( db->bdi_db,
 381                                 DB_DUP | DB_DUPSORT );
 382 #ifndef BDB_HIER
 383                         if ( slapMode & SLAP_TOOL_READONLY ) {
 384                                 flags |= DB_RDONLY;
 385                         } else {
 386                                 flags |= DB_CREATE;
 387                         }
 388 #else
 389                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 390                                 flags |= DB_RDONLY;
 391                         } else {
 392                                 flags |= DB_CREATE;
 393                         }
 394 #endif
 395                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 396                                 BDB_PAGESIZE );
 397                 }
 398
 399 #ifdef HAVE_EBCDIC
 400                 strcpy( path, bdbi_databases[i].file );
 401                 __atoe( path );
 402                 rc = DB_OPEN( db->bdi_db,
 403                         path,
 404                 /*      bdbi_databases[i].name, */ NULL,
 405                         bdbi_databases[i].type,
 406                         bdbi_databases[i].flags | flags,
 407                         bdb->bi_dbenv_mode );
 408 #else
 409                 rc = DB_OPEN( db->bdi_db,
 410                         bdbi_databases[i].file,
 411                 /*      bdbi_databases[i].name, */ NULL,
 412                         bdbi_databases[i].type,
 413                         bdbi_databases[i].flags | flags,
 414                         bdb->bi_dbenv_mode );
 415 #endif
 416
 417                 if ( rc != 0 ) {
 418                         char    buf[SLAP_TEXT_BUFLEN];
 419
 420                         snprintf( buf, sizeof(buf), "%s/%s",
 421                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 422                         Debug( LDAP_DEBUG_ANY,
 423                                 LDAP_XSTRING(bdb_db_open) ": db_open(%s) failed: %s (%d)\n",
 424                                 buf, db_strerror(rc), rc );
 425                         db->bdi_db->close( db->bdi_db, 0 );
 426                         goto fail;
 427                 }
 428
 429                 flags &= ~(DB_CREATE | DB_RDONLY);
 430                 db->bdi_name = bdbi_databases[i].name;
 431                 bdb->bi_databases[i] = db;
 432         }
 433
 434         bdb->bi_databases[i] = NULL;
 435         bdb->bi_ndatabases = i;
 436
 437         /* get nextid */
 438         rc = bdb_last_id( be, NULL );
 439         if( rc != 0 ) {
 440                 Debug( LDAP_DEBUG_ANY,
 441                         LDAP_XSTRING(bdb_db_open) ": last_id(%s) failed: %s (%d)\n",
 442                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 443                 goto fail;
 444         }
 445
 446         if ( !quick ) {
 447                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 448         }
 449
 450         entry_prealloc( bdb->bi_cache.c_maxsize );
 451         attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
 452
 453         /* setup for empty-DN contexts */
 454         if ( BER_BVISEMPTY( &be->be_nsuffix[0] )) {
 455                 rc = bdb_id2entry( be, NULL, 0, 0, &e );
 456         }
 457         if ( !e ) {
 458                 e = entry_alloc();
 459                 e->e_id = 0;
 460                 ber_dupbv( &e->e_name, (struct berval *)&slap_empty_bv );
 461                 ber_dupbv( &e->e_nname, (struct berval *)&slap_empty_bv );
 462         }
 463         e->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
 464         e->e_private = &bdb->bi_cache.c_dntree;
 465         bdb->bi_cache.c_dntree.bei_e = e;
 466
 467         /* monitor setup */
 468         rc = bdb_monitor_db_open( be );
 469         if ( rc != 0 ) {
 470                 goto fail;
 471         }
 472
 473         bdb->bi_flags |= BDB_IS_OPEN;
 474
 475         return 0;
 476
 477 fail:
 478         bdb_db_close( be, NULL );
 479         return rc;
 480 }
 481
 482 static int
 483 bdb_db_close( BackendDB *be, ConfigArgs *ca )
 484 {
 485         int rc;
 486         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 487         struct bdb_db_info *db;
 488         bdb_idl_cache_entry_t *entry, *next_entry;
 489
 490         /* monitor handling */
 491         (void)bdb_monitor_db_close( be );
 492
 493         {
 494                 Entry *e = bdb->bi_cache.c_dntree.bei_e;
 495                 if ( e ) {
 496                         bdb->bi_cache.c_dntree.bei_e = NULL;
 497                         e->e_private = NULL;
 498                         bdb_entry_return( e );
 499                 }
 500         }
 501
 502         bdb->bi_flags &= ~BDB_IS_OPEN;
 503
 504         ber_bvarray_free( bdb->bi_db_config );
 505         bdb->bi_db_config = NULL;
 506
 507         while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
 508                 db = bdb->bi_databases[bdb->bi_ndatabases];
 509                 rc = db->bdi_db->close( db->bdi_db, 0 );
 510                 /* Lower numbered names are not strdup'd */
 511                 if( bdb->bi_ndatabases >= BDB_NDB )
 512                         free( db->bdi_name );
 513                 free( db );
 514         }
 515         free( bdb->bi_databases );
 516         bdb->bi_databases = NULL;
 517
 518         bdb_cache_release_all (&bdb->bi_cache);
 519
 520         if ( bdb->bi_idl_cache_size ) {
 521                 avl_free( bdb->bi_idl_tree, NULL );
 522                 bdb->bi_idl_tree = NULL;
 523                 entry = bdb->bi_idl_lru_head;
 524                 do {
 525                         next_entry = entry->idl_lru_next;
 526                         if ( entry->idl )
 527                                 free( entry->idl );
 528                         free( entry->kstr.bv_val );
 529                         free( entry );
 530                         entry = next_entry;
 531                 } while ( entry != bdb->bi_idl_lru_head );
 532                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 533         }
 534
 535         /* close db environment */
 536         if( bdb->bi_dbenv ) {
 537                 /* Free cache locker if we enabled locking */
 538                 if ( !( slapMode & SLAP_TOOL_QUICK )) {
 539                         XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 540                         bdb->bi_cache.c_locker = 0;
 541                 }
 542 #ifdef BDB_REUSE_LOCKERS
 543                 bdb_locker_flush( bdb->bi_dbenv );
 544 #endif
 545                 /* force a checkpoint, but not if we were ReadOnly,
 546                  * and not in Quick mode since there are no transactions there.
 547                  */
 548                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 549                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 550                         if( rc != 0 ) {
 551                                 Debug( LDAP_DEBUG_ANY,
 552                                         "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
 553                                         db_strerror(rc), rc, 0 );
 554                         }
 555                 }
 556
 557                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 558                 bdb->bi_dbenv = NULL;
 559                 if( rc != 0 ) {
 560                         Debug( LDAP_DEBUG_ANY,
 561                                 "bdb_db_close: close failed: %s (%d)\n",
 562                                 db_strerror(rc), rc, 0 );
 563                         return rc;
 564                 }
 565         }
 566
 567         rc = alock_close( &bdb->bi_alock_info );
 568         if( rc != 0 ) {
 569                 Debug( LDAP_DEBUG_ANY,
 570                         "bdb_db_close: alock_close failed\n", 0, 0, 0 );
 571                 return -1;
 572         }
 573
 574         return 0;
 575 }
 576
 577 static int
 578 bdb_db_destroy( BackendDB *be, ConfigArgs *ca )
 579 {
 580         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 581
 582         /* monitor handling */
 583         (void)bdb_monitor_db_destroy( be );
 584
 585         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 586         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 587
 588         bdb_attr_index_destroy( bdb );
 589
 590         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 591         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_lru_mutex );
 592         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_count_mutex );
 593         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_eifree_mutex );
 594         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 595 #ifdef BDB_HIER
 596         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 597 #endif
 598         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 599         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 600         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 601         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 602
 603         ch_free( bdb );
 604         be->be_private = NULL;
 605
 606         return 0;
 607 }
 608
 609 int
 610 bdb_back_initialize(
 611         BackendInfo     *bi )
 612 {
 613         int rc;
 614
 615         static char *controls[] = {
 616                 LDAP_CONTROL_ASSERT,
 617                 LDAP_CONTROL_MANAGEDSAIT,
 618                 LDAP_CONTROL_NOOP,
 619                 LDAP_CONTROL_PAGEDRESULTS,
 620                 LDAP_CONTROL_PRE_READ,
 621                 LDAP_CONTROL_POST_READ,
 622                 LDAP_CONTROL_SUBENTRIES,
 623                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 624 #ifdef LDAP_X_TXN
 625                 LDAP_CONTROL_X_TXN_SPEC,
 626 #endif
 627                 NULL
 628         };
 629
 630         /* initialize the underlying database system */
 631         Debug( LDAP_DEBUG_TRACE,
 632                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 633                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 634
 635         bi->bi_flags |=
 636                 SLAP_BFLAG_INCREMENT |
 637                 SLAP_BFLAG_SUBENTRIES |
 638                 SLAP_BFLAG_ALIASES |
 639                 SLAP_BFLAG_REFERRALS;
 640
 641         bi->bi_controls = controls;
 642
 643         {       /* version check */
 644                 int major, minor, patch, ver;
 645                 char *version = db_version( &major, &minor, &patch );
 646 #ifdef HAVE_EBCDIC
 647                 char v2[1024];
 648
 649                 /* All our stdio does an ASCII to EBCDIC conversion on
 650                  * the output. Strings from the BDB library are already
 651                  * in EBCDIC; we have to go back and forth...
 652                  */
 653                 strcpy( v2, version );
 654                 __etoa( v2 );
 655                 version = v2;
 656 #endif
 657
 658                 ver = (major << 24) | (minor << 16) | patch;
 659                 if( ver != DB_VERSION_FULL ) {
 660                         /* fail if a versions don't match */
 661                         Debug( LDAP_DEBUG_ANY,
 662                                 LDAP_XSTRING(bdb_back_initialize) ": "
 663                                 "BDB library version mismatch:"
 664                                 " expected " DB_VERSION_STRING ","
 665                                 " got %s\n", version, 0, 0 );
 666                         return -1;
 667                 }
 668
 669                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 670                         ": %s\n", version, 0, 0 );
 671         }
 672
 673         db_env_set_func_free( ber_memfree );
 674         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 675         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 676 #ifndef NO_THREAD
 677         /* This is a no-op on a NO_THREAD build. Leave the default
 678          * alone so that BDB will sleep on interprocess conflicts.
 679          */
 680         db_env_set_func_yield( ldap_pvt_thread_yield );
 681 #endif
 682
 683         bi->bi_open = 0;
 684         bi->bi_close = 0;
 685         bi->bi_config = 0;
 686         bi->bi_destroy = 0;
 687
 688         bi->bi_db_init = bdb_db_init;
 689         bi->bi_db_config = config_generic_wrapper;
 690         bi->bi_db_open = bdb_db_open;
 691         bi->bi_db_close = bdb_db_close;
 692         bi->bi_db_destroy = bdb_db_destroy;
 693
 694         bi->bi_op_add = bdb_add;
 695         bi->bi_op_bind = bdb_bind;
 696         bi->bi_op_compare = bdb_compare;
 697         bi->bi_op_delete = bdb_delete;
 698         bi->bi_op_modify = bdb_modify;
 699         bi->bi_op_modrdn = bdb_modrdn;
 700         bi->bi_op_search = bdb_search;
 701
 702         bi->bi_op_unbind = 0;
 703
 704         bi->bi_extended = bdb_extended;
 705
 706         bi->bi_chk_referrals = bdb_referrals;
 707         bi->bi_operational = bdb_operational;
 708         bi->bi_has_subordinates = bdb_hasSubordinates;
 709         bi->bi_entry_release_rw = bdb_entry_release;
 710         bi->bi_entry_get_rw = bdb_entry_get;
 711
 712         /*
 713          * hooks for slap tools
 714          */
 715         bi->bi_tool_entry_open = bdb_tool_entry_open;
 716         bi->bi_tool_entry_close = bdb_tool_entry_close;
 717         bi->bi_tool_entry_first = bdb_tool_entry_next;
 718         bi->bi_tool_entry_next = bdb_tool_entry_next;
 719         bi->bi_tool_entry_get = bdb_tool_entry_get;
 720         bi->bi_tool_entry_put = bdb_tool_entry_put;
 721         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 722         bi->bi_tool_sync = 0;
 723         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 724         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 725         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 726
 727         bi->bi_connection_init = 0;
 728         bi->bi_connection_destroy = 0;
 729
 730         rc = bdb_back_init_cf( bi );
 731
 732         return rc;
 733 }
 734
 735 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 736         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 737
 738 /* conditionally define the init_module() function */
 739 #ifdef BDB_HIER
 740 SLAP_BACKEND_INIT_MODULE( hdb )
 741 #else /* !BDB_HIER */
 742 SLAP_BACKEND_INIT_MODULE( bdb )
 743 #endif /* !BDB_HIER */
 744
 745 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 746