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, ConfigReply *cr )
  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         be->be_private = bdb;
  88         be->be_cf_ocs = be->bd_info->bi_cf_ocs;
  89
  90         rc = bdb_monitor_db_init( be );
  91
  92         return rc;
  93 }
  94
  95 static int
  96 bdb_db_close( BackendDB *be, ConfigReply *cr );
  97
  98 static int
  99 bdb_db_open( BackendDB *be, ConfigReply *cr )
 100 {
 101         int rc, i;
 102         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 103         struct stat stat1, stat2;
 104         u_int32_t flags;
 105         char path[MAXPATHLEN];
 106         char *dbhome;
 107         Entry *e = NULL;
 108         int do_recover = 0, do_alock_recover = 0;
 109         int alockt, quick = 0;
 110
 111         if ( be->be_suffix == NULL ) {
 112                 Debug( LDAP_DEBUG_ANY,
 113                         LDAP_XSTRING(bdb_db_open) ": need suffix\n",
 114                         1, 0, 0 );
 115                 return -1;
 116         }
 117
 118         Debug( LDAP_DEBUG_ARGS,
 119                 LDAP_XSTRING(bdb_db_open) ": %s\n",
 120                 be->be_suffix[0].bv_val, 0, 0 );
 121
 122 #ifndef BDB_MULTIPLE_SUFFIXES
 123         if ( be->be_suffix[1].bv_val ) {
 124                 if (cr) {
 125                         snprintf(cr->msg, sizeof(cr->msg), "only one suffix allowed");
 126                         Debug( LDAP_DEBUG_ANY,
 127                                 LDAP_XSTRING(bdb_db_open) ": %s\n", cr->msg, 0, 0 );
 128                 }
 129                 return -1;
 130         }
 131 #endif
 132
 133         /* Check existence of dbenv_home. Any error means trouble */
 134         rc = stat( bdb->bi_dbenv_home, &stat1 );
 135         if( rc !=0 ) {
 136                 Debug( LDAP_DEBUG_ANY,
 137                         LDAP_XSTRING(bdb_db_open) ": Cannot access database directory %s (%d)\n",
 138                         bdb->bi_dbenv_home, errno, 0 );
 139                 return -1;
 140         }
 141
 142         /* Perform database use arbitration/recovery logic */
 143         alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
 144         if ( slapMode & SLAP_TOOL_QUICK ) {
 145                 alockt |= ALOCK_NOSAVE;
 146                 quick = 1;
 147         }
 148
 149         rc = alock_open( &bdb->bi_alock_info,
 150                                 "slapd",
 151                                 bdb->bi_dbenv_home, alockt );
 152
 153         /* alockt is TRUE if the existing environment was created in Quick mode */
 154         alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
 155         rc &= ~ALOCK_NOSAVE;
 156
 157         if( rc == ALOCK_RECOVER ) {
 158                 Debug( LDAP_DEBUG_ANY,
 159                         LDAP_XSTRING(bdb_db_open) ": unclean shutdown detected;"
 160                         " attempting recovery.\n",
 161                         0, 0, 0 );
 162                 do_alock_recover = 1;
 163                 do_recover = DB_RECOVER;
 164         } else if( rc == ALOCK_BUSY ) {
 165                 Debug( LDAP_DEBUG_ANY,
 166                         LDAP_XSTRING(bdb_db_open) ": database already in use\n",
 167                         0, 0, 0 );
 168                 return -1;
 169         } else if( rc != ALOCK_CLEAN ) {
 170                 Debug( LDAP_DEBUG_ANY,
 171                         LDAP_XSTRING(bdb_db_open) ": alock package is unstable\n",
 172                         0, 0, 0 );
 173                 return -1;
 174         }
 175
 176         /*
 177          * The DB_CONFIG file may have changed. If so, recover the
 178          * database so that new settings are put into effect. Also
 179          * note the possible absence of DB_CONFIG in the log.
 180          */
 181         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 182                 if ( !do_recover ) {
 183                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 184                         *ptr++ = LDAP_DIRSEP[0];
 185                         strcpy( ptr, "__db.001" );
 186                         if( stat( path, &stat2 ) == 0 ) {
 187                                 if( stat2.st_mtime < stat1.st_mtime ) {
 188                                         Debug( LDAP_DEBUG_ANY,
 189                                                 LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix %s has changed.\n"
 190                                                 "Performing database recovery to activate new settings.\n",
 191                                                 be->be_suffix[0].bv_val, 0, 0 );
 192                                         do_recover = DB_RECOVER;
 193                                 }
 194                         }
 195                 }
 196         }
 197         else {
 198                 Debug( LDAP_DEBUG_ANY,
 199                         LDAP_XSTRING(bdb_db_open) ": Warning - No DB_CONFIG file found "
 200                         "in directory %s: (%d)\n"
 201                         "Expect poor performance for suffix %s.\n",
 202                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 203         }
 204
 205         /* Always let slapcat run, regardless of environment state.
 206          * This can be used to cause a cache flush after an unclean
 207          * shutdown.
 208          */
 209         if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
 210                 Debug( LDAP_DEBUG_ANY,
 211                         LDAP_XSTRING(bdb_db_open) ": Recovery skipped in read-only mode. "
 212                         "Run manual recovery if errors are encountered.\n",
 213                         0, 0, 0 );
 214                 do_recover = 0;
 215                 quick = alockt;
 216         }
 217
 218         /* An existing environment in Quick mode has nothing to recover. */
 219         if ( alockt && do_recover ) {
 220                 Debug( LDAP_DEBUG_ANY,
 221                         LDAP_XSTRING(bdb_db_open) ": cannot recover, database must be reinitialized.\n",
 222                         0, 0, 0 );
 223                 rc = -1;
 224                 goto fail;
 225         }
 226
 227         rc = db_env_create( &bdb->bi_dbenv, 0 );
 228         if( rc != 0 ) {
 229                 Debug( LDAP_DEBUG_ANY,
 230                         LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 231                         db_strerror(rc), rc, 0 );
 232                 goto fail;
 233         }
 234
 235 #ifdef HAVE_EBCDIC
 236         strcpy( path, bdb->bi_dbenv_home );
 237         __atoe( path );
 238         dbhome = path;
 239 #else
 240         dbhome = bdb->bi_dbenv_home;
 241 #endif
 242
 243         /* If existing environment is clean but doesn't support
 244          * currently requested modes, remove it.
 245          */
 246         if ( !do_recover && ( alockt ^ quick )) {
 247 shm_retry:
 248                 rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
 249                 if ( rc ) {
 250                         Debug( LDAP_DEBUG_ANY,
 251                                 LDAP_XSTRING(bdb_db_open) ": dbenv remove failed: %s (%d)\n",
 252                                 db_strerror(rc), rc, 0 );
 253                         bdb->bi_dbenv = NULL;
 254                         goto fail;
 255                 }
 256                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 257                 if( rc != 0 ) {
 258                         Debug( LDAP_DEBUG_ANY,
 259                                 LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
 260                                 db_strerror(rc), rc, 0 );
 261                         goto fail;
 262                 }
 263         }
 264
 265         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 266         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 267
 268         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 269
 270         /* One long-lived TXN per thread, two TXNs per write op */
 271         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 272
 273         if( bdb->bi_dbenv_xflags != 0 ) {
 274                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 275                         bdb->bi_dbenv_xflags, 1);
 276                 if( rc != 0 ) {
 277                         Debug( LDAP_DEBUG_ANY,
 278                                 LDAP_XSTRING(bdb_db_open) ": dbenv_set_flags failed: %s (%d)\n",
 279                                 db_strerror(rc), rc, 0 );
 280                         goto fail;
 281                 }
 282         }
 283
 284 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 285
 286         Debug( LDAP_DEBUG_TRACE,
 287                 LDAP_XSTRING(bdb_db_open) ": dbenv_open(%s)\n",
 288                 bdb->bi_dbenv_home, 0, 0);
 289
 290         flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
 291
 292         if ( !quick )
 293                 flags |= BDB_TXN_FLAGS;
 294
 295         /* If a key was set, use shared memory for the BDB environment */
 296         if ( bdb->bi_shm_key ) {
 297                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 298                 flags |= DB_SYSTEM_MEM;
 299         }
 300         rc = (bdb->bi_dbenv->open)( bdb->bi_dbenv, dbhome,
 301                         flags | do_recover, bdb->bi_dbenv_mode );
 302
 303         if ( rc ) {
 304                 /* Regular open faied, probably a missing shm environment.
 305                  * Start over, do a recovery.
 306                  */
 307                 if ( !do_recover && bdb->bi_shm_key ) {
 308                         bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 309                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 310                         if( rc == 0 ) {
 311                                 Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
 312                                         ": Shared memory env open failed, assuming stale env\n",
 313                                         0, 0, 0 );
 314                                 goto shm_retry;
 315                         }
 316                 }
 317                 Debug( LDAP_DEBUG_ANY,
 318                         LDAP_XSTRING(bdb_db_open) ": Database cannot be %s, err %d. "
 319                         "Restore from backup!\n",
 320                                 do_recover ? "recovered" : "opened", rc, 0);
 321                 goto fail;
 322         }
 323
 324         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 325                 Debug( LDAP_DEBUG_ANY,
 326                         LDAP_XSTRING(bdb_db_open) ": alock_recover failed\n",
 327                         0, 0, 0 );
 328                 rc = -1;
 329                 goto fail;
 330         }
 331
 332 #ifdef SLAP_ZONE_ALLOC
 333         if ( bdb->bi_cache.c_maxsize ) {
 334                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 335                         SLAP_ZONE_INITSIZE, SLAP_ZONE_MAXSIZE,
 336                         SLAP_ZONE_DELTA, SLAP_ZONE_SIZE);
 337         }
 338 #endif
 339
 340         if ( bdb->bi_idl_cache_max_size ) {
 341                 bdb->bi_idl_tree = NULL;
 342                 bdb->bi_idl_cache_size = 0;
 343         }
 344
 345         flags = DB_THREAD | bdb->bi_db_opflags;
 346
 347 #ifdef DB_AUTO_COMMIT
 348         if ( !quick )
 349                 flags |= DB_AUTO_COMMIT;
 350 #endif
 351
 352         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 353                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 354
 355         /* open (and create) main database */
 356         for( i = 0; bdbi_databases[i].name; i++ ) {
 357                 struct bdb_db_info *db;
 358
 359                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 360
 361                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 362                 if( rc != 0 ) {
 363                         Debug( LDAP_DEBUG_ANY,
 364                                 LDAP_XSTRING(bdb_db_open) ": db_create(%s) failed: %s (%d)\n",
 365                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 366                         goto fail;
 367                 }
 368
 369                 if( i == BDB_ID2ENTRY ) {
 370                         if ( slapMode & SLAP_TOOL_MODE )
 371                                 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 372                                         DB_PRIORITY_VERY_LOW );
 373
 374                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 375                                 BDB_ID2ENTRY_PAGESIZE );
 376                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 377                                 flags |= DB_RDONLY;
 378                         } else {
 379                                 flags |= DB_CREATE;
 380                         }
 381                 } else {
 382                         rc = db->bdi_db->set_flags( db->bdi_db,
 383                                 DB_DUP | DB_DUPSORT );
 384 #ifndef BDB_HIER
 385                         if ( slapMode & SLAP_TOOL_READONLY ) {
 386                                 flags |= DB_RDONLY;
 387                         } else {
 388                                 flags |= DB_CREATE;
 389                         }
 390 #else
 391                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 392                                 flags |= DB_RDONLY;
 393                         } else {
 394                                 flags |= DB_CREATE;
 395                         }
 396 #endif
 397                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 398                                 BDB_PAGESIZE );
 399                 }
 400
 401 #ifdef HAVE_EBCDIC
 402                 strcpy( path, bdbi_databases[i].file );
 403                 __atoe( path );
 404                 rc = DB_OPEN( db->bdi_db,
 405                         path,
 406                 /*      bdbi_databases[i].name, */ NULL,
 407                         bdbi_databases[i].type,
 408                         bdbi_databases[i].flags | flags,
 409                         bdb->bi_dbenv_mode );
 410 #else
 411                 rc = DB_OPEN( db->bdi_db,
 412                         bdbi_databases[i].file,
 413                 /*      bdbi_databases[i].name, */ NULL,
 414                         bdbi_databases[i].type,
 415                         bdbi_databases[i].flags | flags,
 416                         bdb->bi_dbenv_mode );
 417 #endif
 418
 419                 if ( rc != 0 ) {
 420                         char    buf[SLAP_TEXT_BUFLEN];
 421
 422                         snprintf( buf, sizeof(buf), "%s/%s",
 423                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 424                         Debug( LDAP_DEBUG_ANY,
 425                                 LDAP_XSTRING(bdb_db_open) ": db_open(%s) failed: %s (%d)\n",
 426                                 buf, db_strerror(rc), rc );
 427                         db->bdi_db->close( db->bdi_db, 0 );
 428                         goto fail;
 429                 }
 430
 431                 flags &= ~(DB_CREATE | DB_RDONLY);
 432                 db->bdi_name = bdbi_databases[i].name;
 433                 bdb->bi_databases[i] = db;
 434         }
 435
 436         bdb->bi_databases[i] = NULL;
 437         bdb->bi_ndatabases = i;
 438
 439         /* get nextid */
 440         rc = bdb_last_id( be, NULL );
 441         if( rc != 0 ) {
 442                 Debug( LDAP_DEBUG_ANY,
 443                         LDAP_XSTRING(bdb_db_open) ": last_id(%s) failed: %s (%d)\n",
 444                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 445                 goto fail;
 446         }
 447
 448         if ( !quick ) {
 449                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 450         }
 451
 452         entry_prealloc( bdb->bi_cache.c_maxsize );
 453         attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
 454
 455         /* setup for empty-DN contexts */
 456         if ( BER_BVISEMPTY( &be->be_nsuffix[0] )) {
 457                 rc = bdb_id2entry( be, NULL, 0, 0, &e );
 458         }
 459         if ( !e ) {
 460                 e = entry_alloc();
 461                 e->e_id = 0;
 462                 ber_dupbv( &e->e_name, (struct berval *)&slap_empty_bv );
 463                 ber_dupbv( &e->e_nname, (struct berval *)&slap_empty_bv );
 464         }
 465         e->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
 466         e->e_private = &bdb->bi_cache.c_dntree;
 467         bdb->bi_cache.c_dntree.bei_e = e;
 468
 469         /* monitor setup */
 470         rc = bdb_monitor_db_open( be );
 471         if ( rc != 0 ) {
 472                 goto fail;
 473         }
 474
 475         bdb->bi_flags |= BDB_IS_OPEN;
 476
 477         return 0;
 478
 479 fail:
 480         bdb_db_close( be, NULL );
 481         return rc;
 482 }
 483
 484 static int
 485 bdb_db_close( BackendDB *be, ConfigReply *cr )
 486 {
 487         int rc;
 488         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 489         struct bdb_db_info *db;
 490         bdb_idl_cache_entry_t *entry, *next_entry;
 491
 492         /* monitor handling */
 493         (void)bdb_monitor_db_close( be );
 494
 495         {
 496                 Entry *e = bdb->bi_cache.c_dntree.bei_e;
 497                 if ( e ) {
 498                         bdb->bi_cache.c_dntree.bei_e = NULL;
 499                         e->e_private = NULL;
 500                         bdb_entry_return( e );
 501                 }
 502         }
 503
 504         bdb->bi_flags &= ~BDB_IS_OPEN;
 505
 506         ber_bvarray_free( bdb->bi_db_config );
 507         bdb->bi_db_config = NULL;
 508
 509         while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
 510                 db = bdb->bi_databases[bdb->bi_ndatabases];
 511                 rc = db->bdi_db->close( db->bdi_db, 0 );
 512                 /* Lower numbered names are not strdup'd */
 513                 if( bdb->bi_ndatabases >= BDB_NDB )
 514                         free( db->bdi_name );
 515                 free( db );
 516         }
 517         free( bdb->bi_databases );
 518         bdb->bi_databases = NULL;
 519
 520         bdb_cache_release_all (&bdb->bi_cache);
 521
 522         if ( bdb->bi_idl_cache_size ) {
 523                 avl_free( bdb->bi_idl_tree, NULL );
 524                 bdb->bi_idl_tree = NULL;
 525                 entry = bdb->bi_idl_lru_head;
 526                 do {
 527                         next_entry = entry->idl_lru_next;
 528                         if ( entry->idl )
 529                                 free( entry->idl );
 530                         free( entry->kstr.bv_val );
 531                         free( entry );
 532                         entry = next_entry;
 533                 } while ( entry != bdb->bi_idl_lru_head );
 534                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 535         }
 536
 537         /* close db environment */
 538         if( bdb->bi_dbenv ) {
 539                 /* Free cache locker if we enabled locking */
 540                 if ( !( slapMode & SLAP_TOOL_QUICK )) {
 541                         XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 542                         bdb->bi_cache.c_locker = 0;
 543                 }
 544 #ifdef BDB_REUSE_LOCKERS
 545                 bdb_locker_flush( bdb->bi_dbenv );
 546 #endif
 547                 /* force a checkpoint, but not if we were ReadOnly,
 548                  * and not in Quick mode since there are no transactions there.
 549                  */
 550                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 551                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 552                         if( rc != 0 ) {
 553                                 Debug( LDAP_DEBUG_ANY,
 554                                         "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
 555                                         db_strerror(rc), rc, 0 );
 556                         }
 557                 }
 558
 559                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 560                 bdb->bi_dbenv = NULL;
 561                 if( rc != 0 ) {
 562                         Debug( LDAP_DEBUG_ANY,
 563                                 "bdb_db_close: close failed: %s (%d)\n",
 564                                 db_strerror(rc), rc, 0 );
 565                         return rc;
 566                 }
 567         }
 568
 569         rc = alock_close( &bdb->bi_alock_info );
 570         if( rc != 0 ) {
 571                 Debug( LDAP_DEBUG_ANY,
 572                         "bdb_db_close: alock_close failed\n", 0, 0, 0 );
 573                 return -1;
 574         }
 575
 576         return 0;
 577 }
 578
 579 static int
 580 bdb_db_destroy( BackendDB *be, ConfigReply *cr )
 581 {
 582         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 583
 584         /* monitor handling */
 585         (void)bdb_monitor_db_destroy( be );
 586
 587         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 588         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 589
 590         bdb_attr_index_destroy( bdb );
 591
 592         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 593         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_lru_mutex );
 594         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_count_mutex );
 595         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_eifree_mutex );
 596         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 597 #ifdef BDB_HIER
 598         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 599 #endif
 600         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 601         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 602         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 603         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 604
 605         ch_free( bdb );
 606         be->be_private = NULL;
 607
 608         return 0;
 609 }
 610
 611 int
 612 bdb_back_initialize(
 613         BackendInfo     *bi )
 614 {
 615         int rc;
 616
 617         static char *controls[] = {
 618                 LDAP_CONTROL_ASSERT,
 619                 LDAP_CONTROL_MANAGEDSAIT,
 620                 LDAP_CONTROL_NOOP,
 621                 LDAP_CONTROL_PAGEDRESULTS,
 622                 LDAP_CONTROL_PRE_READ,
 623                 LDAP_CONTROL_POST_READ,
 624                 LDAP_CONTROL_SUBENTRIES,
 625                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 626 #ifdef LDAP_X_TXN
 627                 LDAP_CONTROL_X_TXN_SPEC,
 628 #endif
 629                 NULL
 630         };
 631
 632         /* initialize the underlying database system */
 633         Debug( LDAP_DEBUG_TRACE,
 634                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 635                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 636
 637         bi->bi_flags |=
 638                 SLAP_BFLAG_INCREMENT |
 639                 SLAP_BFLAG_SUBENTRIES |
 640                 SLAP_BFLAG_ALIASES |
 641                 SLAP_BFLAG_REFERRALS;
 642
 643         bi->bi_controls = controls;
 644
 645         {       /* version check */
 646                 int major, minor, patch, ver;
 647                 char *version = db_version( &major, &minor, &patch );
 648 #ifdef HAVE_EBCDIC
 649                 char v2[1024];
 650
 651                 /* All our stdio does an ASCII to EBCDIC conversion on
 652                  * the output. Strings from the BDB library are already
 653                  * in EBCDIC; we have to go back and forth...
 654                  */
 655                 strcpy( v2, version );
 656                 __etoa( v2 );
 657                 version = v2;
 658 #endif
 659
 660                 ver = (major << 24) | (minor << 16) | patch;
 661                 if( ver != DB_VERSION_FULL ) {
 662                         /* fail if a versions don't match */
 663                         Debug( LDAP_DEBUG_ANY,
 664                                 LDAP_XSTRING(bdb_back_initialize) ": "
 665                                 "BDB library version mismatch:"
 666                                 " expected " DB_VERSION_STRING ","
 667                                 " got %s\n", version, 0, 0 );
 668                         return -1;
 669                 }
 670
 671                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 672                         ": %s\n", version, 0, 0 );
 673         }
 674
 675         db_env_set_func_free( ber_memfree );
 676         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 677         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 678 #ifndef NO_THREAD
 679         /* This is a no-op on a NO_THREAD build. Leave the default
 680          * alone so that BDB will sleep on interprocess conflicts.
 681          */
 682         db_env_set_func_yield( ldap_pvt_thread_yield );
 683 #endif
 684
 685         bi->bi_open = 0;
 686         bi->bi_close = 0;
 687         bi->bi_config = 0;
 688         bi->bi_destroy = 0;
 689
 690         bi->bi_db_init = bdb_db_init;
 691         bi->bi_db_config = config_generic_wrapper;
 692         bi->bi_db_open = bdb_db_open;
 693         bi->bi_db_close = bdb_db_close;
 694         bi->bi_db_destroy = bdb_db_destroy;
 695
 696         bi->bi_op_add = bdb_add;
 697         bi->bi_op_bind = bdb_bind;
 698         bi->bi_op_compare = bdb_compare;
 699         bi->bi_op_delete = bdb_delete;
 700         bi->bi_op_modify = bdb_modify;
 701         bi->bi_op_modrdn = bdb_modrdn;
 702         bi->bi_op_search = bdb_search;
 703
 704         bi->bi_op_unbind = 0;
 705
 706         bi->bi_extended = bdb_extended;
 707
 708         bi->bi_chk_referrals = bdb_referrals;
 709         bi->bi_operational = bdb_operational;
 710         bi->bi_has_subordinates = bdb_hasSubordinates;
 711         bi->bi_entry_release_rw = bdb_entry_release;
 712         bi->bi_entry_get_rw = bdb_entry_get;
 713
 714         /*
 715          * hooks for slap tools
 716          */
 717         bi->bi_tool_entry_open = bdb_tool_entry_open;
 718         bi->bi_tool_entry_close = bdb_tool_entry_close;
 719         bi->bi_tool_entry_first = bdb_tool_entry_next;
 720         bi->bi_tool_entry_next = bdb_tool_entry_next;
 721         bi->bi_tool_entry_get = bdb_tool_entry_get;
 722         bi->bi_tool_entry_put = bdb_tool_entry_put;
 723         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 724         bi->bi_tool_sync = 0;
 725         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 726         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 727
 728         bi->bi_connection_init = 0;
 729         bi->bi_connection_destroy = 0;
 730
 731         rc = bdb_back_init_cf( bi );
 732
 733         return rc;
 734 }
 735
 736 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 737         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 738
 739 /* conditionally define the init_module() function */
 740 #ifdef BDB_HIER
 741 SLAP_BACKEND_INIT_MODULE( hdb )
 742 #else /* !BDB_HIER */
 743 SLAP_BACKEND_INIT_MODULE( bdb )
 744 #endif /* !BDB_HIER */
 745
 746 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 747