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 2000-2005 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 #ifdef HAVE_UTIME_H
  26 #  ifdef HAVE_SYS_TYPES_H
  27 #    include <sys/types.h>
  28 #  endif
  29 #  include <utime.h>
  30 #endif /* HAVE_UTIME_H */
  31 #include "back-bdb.h"
  32 #include <lutil.h>
  33 #include <ldap_rq.h>
  34 #include "alock.h"
  35
  36 static const struct bdbi_database {
  37         char *file;
  38         char *name;
  39         int type;
  40         int flags;
  41 } bdbi_databases[] = {
  42         { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
  43         { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
  44         { NULL, NULL, 0, 0 }
  45 };
  46
  47 typedef void * db_malloc(size_t);
  48 typedef void * db_realloc(void *, size_t);
  49
  50 static int
  51 bdb_db_init( BackendDB *be )
  52 {
  53         struct bdb_info *bdb;
  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
  69         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  70         bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
  71         bdb->bi_search_stack = NULL;
  72
  73         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  74         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  75 #ifdef BDB_HIER
  76         ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
  77 #endif
  78         ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_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_open( BackendDB *be )
  92 {
  93         int rc, i;
  94         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  95         struct stat stat1, stat2;
  96         u_int32_t flags;
  97         char path[MAXPATHLEN];
  98         char *dbhome;
  99         int do_recover = 0, do_alock_recover = 0, open_env = 1, got_env = 0;
 100
 101         if ( be->be_suffix == NULL ) {
 102                 Debug( LDAP_DEBUG_ANY,
 103                         "bdb_db_open: need suffix\n",
 104                         0, 0, 0 );
 105                 return -1;
 106         }
 107
 108         Debug( LDAP_DEBUG_ARGS,
 109                 "bdb_db_open: %s\n",
 110                 be->be_suffix[0].bv_val, 0, 0 );
 111
 112 #ifndef BDB_MULTIPLE_SUFFIXES
 113         if ( be->be_suffix[1].bv_val ) {
 114         Debug( LDAP_DEBUG_ANY,
 115                 "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
 116                 return -1;
 117         }
 118 #endif
 119
 120         /* Check existence of dbenv_home. Any error means trouble */
 121         rc = stat( bdb->bi_dbenv_home, &stat1 );
 122         if( rc !=0 ) {
 123                 Debug( LDAP_DEBUG_ANY,
 124                         "bdb_db_open: Cannot access database directory %s (%d)\n",
 125                         bdb->bi_dbenv_home, errno, 0 );
 126                         return -1;
 127         }
 128
 129         /* Perform database use arbitration/recovery logic */
 130         rc = alock_open( &bdb->bi_alock_info,
 131                                 "slapd",
 132                                 bdb->bi_dbenv_home,
 133                                 slapMode & SLAP_TOOL_READONLY ?
 134                                 ALOCK_LOCKED : ALOCK_UNIQUE );
 135
 136         if( rc == ALOCK_RECOVER ) {
 137                 Debug( LDAP_DEBUG_ANY,
 138                         "bdb_db_open: unclean shutdown detected;"
 139                         " attempting recovery.\n",
 140                         0, 0, 0 );
 141                 do_alock_recover = 1;
 142                 do_recover = 1;
 143         } else if( rc == ALOCK_BUSY ) {
 144                 Debug( LDAP_DEBUG_ANY,
 145                         "bdb_db_open: database already in use\n",
 146                         0, 0, 0 );
 147                 return -1;
 148         } else if( rc != ALOCK_CLEAN ) {
 149                 Debug( LDAP_DEBUG_ANY,
 150                         "bdb_db_open: alock package is unstable\n",
 151                         0, 0, 0 );
 152                 return -1;
 153         }
 154
 155         /*
 156          * The DB_CONFIG file may have changed. If so, recover the
 157          * database so that new settings are put into effect. Also
 158          * note the possible absence of DB_CONFIG in the log.
 159          */
 160         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 161                 if ( !do_recover ) {
 162                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 163                         *ptr++ = LDAP_DIRSEP[0];
 164                         strcpy( ptr, "__db.001" );
 165                         if( stat( path, &stat2 ) == 0 ) {
 166                                 if( stat2.st_mtime <= stat1.st_mtime ) {
 167                                         Debug( LDAP_DEBUG_ANY,
 168                                                 "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
 169                                                 "Performing database recovery to activate new settings.\n",
 170                                                 be->be_suffix[0].bv_val, 0, 0 );
 171                                         do_recover = 1;
 172                                 }
 173                         }
 174                 }
 175         }
 176         else {
 177                 Debug( LDAP_DEBUG_ANY,
 178                         "bdb_db_open: Warning - No DB_CONFIG file found "
 179                         "in directory %s: (%d)\n"
 180                         "Expect poor performance for suffix %s.\n",
 181                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 182         }
 183
 184         rc = db_env_create( &bdb->bi_dbenv, 0 );
 185         if( rc != 0 ) {
 186                 Debug( LDAP_DEBUG_ANY,
 187                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 188                         db_strerror(rc), rc, 0 );
 189                 return rc;
 190         }
 191
 192         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 193         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 194
 195         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 196
 197         /* One long-lived TXN per thread, two TXNs per write op */
 198         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 199
 200         if( bdb->bi_dbenv_xflags != 0 ) {
 201                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 202                         bdb->bi_dbenv_xflags, 1);
 203                 if( rc != 0 ) {
 204                         Debug( LDAP_DEBUG_ANY,
 205                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 206                                 db_strerror(rc), rc, 0 );
 207                         return rc;
 208                 }
 209         }
 210
 211 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 212
 213 #ifdef HAVE_EBCDIC
 214         strcpy( path, bdb->bi_dbenv_home );
 215         __atoe( path );
 216         dbhome = path;
 217 #else
 218         dbhome = bdb->bi_dbenv_home;
 219 #endif
 220
 221         Debug( LDAP_DEBUG_TRACE,
 222                 "bdb_db_open: dbenv_open(%s)\n",
 223                 bdb->bi_dbenv_home, 0, 0);
 224
 225         /* Check if there is a usable existing environment */
 226         flags = DB_JOINENV | DB_THREAD;
 227
 228         rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 229                 flags, bdb->bi_dbenv_mode );
 230         if( rc == 0 ) {
 231                 int flags_ok = 0;
 232
 233                 got_env = 1;
 234
 235                 rc = bdb->bi_dbenv->get_open_flags( bdb->bi_dbenv, &flags );
 236                 if ( rc == 0 ) {
 237                         int flag2 = flags & BDB_TXN_FLAGS;
 238
 239                         /* In quick mode, none of these flags are allowed */
 240                         if ( slapMode & SLAP_TOOL_QUICK ) {
 241                                 if ( !flag2 )
 242                                         flags_ok = 1;
 243                         } else {
 244                         /* In normal mode, all of these flags are required */
 245                                 if ( flag2 == BDB_TXN_FLAGS )
 246                                         flags_ok = 1;
 247                         }
 248                 }
 249
 250                 /* In Quick mode, we cannot Recover... */
 251                 if ( slapMode & SLAP_TOOL_QUICK ) {
 252                         /* If we need to recover but we had no TXNs, just fail */
 253                         if ( do_recover && flags_ok ) {
 254                                 Debug( LDAP_DEBUG_ANY,
 255                                         "bdb_db_open: Database cannot be recovered. "
 256                                         "Restore from backup!\n", 0, 0, 0);
 257                                 return -1;
 258                         }
 259                         /* We need to recover, and we had TXN support before:
 260                          * Close this env, open a new one with recovery flags.
 261                          */
 262                         if ( do_recover ) {
 263                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 264                                 bdb->bi_dbenv = NULL;
 265                                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 266                                 if( rc != 0 ) {
 267                                         Debug( LDAP_DEBUG_ANY,
 268                                                 "bdb_db_open: db_env_create failed: %s (%d)\n",
 269                                                 db_strerror(rc), rc, 0 );
 270                                         return rc;
 271                                 }
 272                                 bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv,
 273                                         be->be_suffix[0].bv_val );
 274                                 bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 275                                 rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 276                                         flags | DB_RECOVER, bdb->bi_dbenv_mode );
 277                                 if( rc != 0 ) {
 278                                         Debug( LDAP_DEBUG_ANY,
 279                                                 "bdb_db_open: recovery failed: %s (%d)\n",
 280                                                 db_strerror(rc), rc, 0 );
 281                                         return rc;
 282                                 }
 283                                 do_recover = 0;
 284                         }
 285                         /* Prev environment had TXN support, get rid of it */
 286                         if ( !flags_ok ) {
 287                                 bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, 0 );
 288                                 bdb->bi_dbenv = NULL;
 289                         }
 290                 /* Normal TXN mode */
 291                 } else {
 292                         /* If we need to recover but we had no TXNs, just fail */
 293                         if ( do_recover && !flags_ok ) {
 294                                 Debug( LDAP_DEBUG_ANY,
 295                                         "bdb_db_open: Database cannot be recovered. "
 296                                         "Restore from backup!\n", 0, 0, 0);
 297                                 return -1;
 298                         }
 299                         /* Prev environment had no TXN support, close it */
 300                         if ( !flags_ok ) {
 301                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 302                                 bdb->bi_dbenv = NULL;
 303                                 do_recover = 1;
 304                         }
 305                 }
 306
 307                 if ( flags_ok && !do_recover ) {
 308                         /* This environment is fine, don't reopen it */
 309                         open_env = 0;
 310                 } else {
 311                         /* Create a new env that can take the desired settings */
 312                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 313                         if( rc != 0 ) {
 314                                 Debug( LDAP_DEBUG_ANY,
 315                                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 316                                         db_strerror(rc), rc, 0 );
 317                                 return rc;
 318                         }
 319
 320                         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 321                         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 322                         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 323
 324                         /* One long-lived TXN per thread, two TXNs per write op */
 325                         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 326
 327                         if( bdb->bi_dbenv_xflags != 0 ) {
 328                                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 329                                         bdb->bi_dbenv_xflags, 1);
 330                                 if( rc != 0 ) {
 331                                         Debug( LDAP_DEBUG_ANY,
 332                                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 333                                                 db_strerror(rc), rc, 0 );
 334                                         return rc;
 335                                 }
 336                         }
 337                 }
 338         }
 339
 340         /* If we need to recover but there was no existing environment,
 341          * then we assume that someone has already manually recovered using
 342          * db_recover. Just ignore it.
 343          */
 344         if ( do_recover && !got_env ) {
 345                 do_recover = 0;
 346                 Debug( LDAP_DEBUG_TRACE,
 347                         "bdb_db_open: Recovery needed but environment is missing - "
 348                         "assuming recovery was done manually...\n", 0, 0, 0 );
 349         }
 350
 351         if ( open_env ) {
 352                 flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 353                 if ( !( slapMode & SLAP_TOOL_QUICK ))
 354                         flags |= BDB_TXN_FLAGS;
 355
 356                 if ( do_recover )
 357                         flags |= DB_RECOVER;
 358
 359                 /* If a key was set, use shared memory for the BDB environment */
 360                 if ( bdb->bi_shm_key ) {
 361                         bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 362                         flags |= DB_SYSTEM_MEM;
 363                 }
 364
 365                 rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 366                         flags, bdb->bi_dbenv_mode );
 367                 if( rc != 0 ) {
 368                         Debug( LDAP_DEBUG_ANY,
 369                                 "bdb_db_open: dbenv_open failed: %s (%d)\n",
 370                                 db_strerror(rc), rc, 0 );
 371                         return rc;
 372                 }
 373         }
 374
 375         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 376                 Debug( LDAP_DEBUG_ANY,
 377                         "bdb_db_open: alock_recover failed\n",
 378                         0, 0, 0 );
 379                 return -1;
 380         }
 381
 382 #ifdef SLAP_ZONE_ALLOC
 383         if ( bdb->bi_cache.c_maxsize ) {
 384                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 385                                                                 SLAP_ZONE_INITSIZE,
 386                                                                 SLAP_ZONE_MAXSIZE,
 387                                                                 SLAP_ZONE_DELTA,
 388                                                                 SLAP_ZONE_SIZE);
 389         }
 390 #endif
 391
 392         if ( bdb->bi_idl_cache_max_size ) {
 393                 bdb->bi_idl_tree = NULL;
 394                 bdb->bi_idl_cache_size = 0;
 395         }
 396
 397         flags = DB_THREAD | bdb->bi_db_opflags;
 398
 399 #ifdef DB_AUTO_COMMIT
 400         if ( !( slapMode & SLAP_TOOL_QUICK ))
 401                 flags |= DB_AUTO_COMMIT;
 402 #endif
 403
 404         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 405                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 406
 407         /* open (and create) main database */
 408         for( i = 0; bdbi_databases[i].name; i++ ) {
 409                 struct bdb_db_info *db;
 410
 411                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 412
 413                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 414                 if( rc != 0 ) {
 415                         Debug( LDAP_DEBUG_ANY,
 416                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 417                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 418                         return rc;
 419                 }
 420
 421                 if( i == BDB_ID2ENTRY ) {
 422                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 423                                 BDB_ID2ENTRY_PAGESIZE );
 424                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 425                                 flags |= DB_RDONLY;
 426                         } else {
 427                                 flags |= DB_CREATE;
 428                         }
 429                 } else {
 430                         rc = db->bdi_db->set_flags( db->bdi_db,
 431                                 DB_DUP | DB_DUPSORT );
 432 #ifndef BDB_HIER
 433                         if ( slapMode & SLAP_TOOL_READONLY ) {
 434                                 flags |= DB_RDONLY;
 435                         } else {
 436                                 flags |= DB_CREATE;
 437                         }
 438 #else
 439                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 440                                 flags |= DB_RDONLY;
 441                         } else {
 442                                 flags |= DB_CREATE;
 443                         }
 444 #endif
 445                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 446                                 BDB_PAGESIZE );
 447                 }
 448
 449 #ifdef HAVE_EBCDIC
 450                 strcpy( path, bdbi_databases[i].file );
 451                 __atoe( path );
 452                 rc = DB_OPEN( db->bdi_db,
 453                         path,
 454                 /*      bdbi_databases[i].name, */ NULL,
 455                         bdbi_databases[i].type,
 456                         bdbi_databases[i].flags | flags,
 457                         bdb->bi_dbenv_mode );
 458 #else
 459                 rc = DB_OPEN( db->bdi_db,
 460                         bdbi_databases[i].file,
 461                 /*      bdbi_databases[i].name, */ NULL,
 462                         bdbi_databases[i].type,
 463                         bdbi_databases[i].flags | flags,
 464                         bdb->bi_dbenv_mode );
 465 #endif
 466
 467                 if ( rc != 0 ) {
 468                         char    buf[SLAP_TEXT_BUFLEN];
 469
 470                         snprintf( buf, sizeof(buf), "%s/%s",
 471                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 472                         Debug( LDAP_DEBUG_ANY,
 473                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 474                                 buf, db_strerror(rc), rc );
 475                         return rc;
 476                 }
 477
 478 #if 0
 479                 if( i == BDB_ID2ENTRY && ( slapMode & SLAP_TOOL_MODE )) {
 480                         db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 481                                 DB_PRIORITY_VERY_LOW );
 482                 }
 483 #endif
 484
 485                 flags &= ~(DB_CREATE | DB_RDONLY);
 486                 db->bdi_name = bdbi_databases[i].name;
 487                 bdb->bi_databases[i] = db;
 488         }
 489
 490         bdb->bi_databases[i] = NULL;
 491         bdb->bi_ndatabases = i;
 492
 493         /* get nextid */
 494         rc = bdb_last_id( be, NULL );
 495         if( rc != 0 ) {
 496                 Debug( LDAP_DEBUG_ANY,
 497                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 498                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 499                 return rc;
 500         }
 501
 502         if ( !( slapMode & SLAP_TOOL_QUICK )) {
 503                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 504         }
 505
 506         bdb->bi_flags |= BDB_IS_OPEN;
 507
 508         return 0;
 509 }
 510
 511 static int
 512 bdb_db_close( BackendDB *be )
 513 {
 514         int rc;
 515         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 516         struct bdb_db_info *db;
 517         bdb_idl_cache_entry_t *entry, *next_entry;
 518
 519         /* backend_shutdown closes everything, even if not all were opened */
 520         if ( !( bdb->bi_flags & BDB_IS_OPEN ))
 521                 return 0;
 522
 523         bdb->bi_flags &= ~BDB_IS_OPEN;
 524
 525         ber_bvarray_free( bdb->bi_db_config );
 526         bdb->bi_db_config = NULL;
 527
 528         while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
 529                 db = bdb->bi_databases[bdb->bi_ndatabases];
 530                 rc = db->bdi_db->close( db->bdi_db, 0 );
 531                 /* Lower numbered names are not strdup'd */
 532                 if( bdb->bi_ndatabases >= BDB_NDB )
 533                         free( db->bdi_name );
 534                 free( db );
 535         }
 536         free( bdb->bi_databases );
 537         bdb->bi_databases = NULL;
 538
 539         bdb_cache_release_all (&bdb->bi_cache);
 540
 541         if ( bdb->bi_idl_cache_max_size ) {
 542                 ldap_pvt_thread_rdwr_wlock ( &bdb->bi_idl_tree_rwlock );
 543                 avl_free( bdb->bi_idl_tree, NULL );
 544                 bdb->bi_idl_tree = NULL;
 545                 entry = bdb->bi_idl_lru_head;
 546                 while ( entry != NULL ) {
 547                         next_entry = entry->idl_lru_next;
 548                         if ( entry->idl )
 549                                 free( entry->idl );
 550                         free( entry->kstr.bv_val );
 551                         free( entry );
 552                         entry = next_entry;
 553                 }
 554                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 555                 ldap_pvt_thread_rdwr_wunlock ( &bdb->bi_idl_tree_rwlock );
 556         }
 557
 558         if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_dbenv ) {
 559                 XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 560                 bdb->bi_cache.c_locker = 0;
 561         }
 562
 563         /* close db environment */
 564         if( bdb->bi_dbenv ) {
 565                 /* force a checkpoint, but not if we were ReadOnly,
 566                  * and not in Quick mode since there are no transactions there.
 567                  */
 568                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 569                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 570                         if( rc != 0 ) {
 571                                 Debug( LDAP_DEBUG_ANY,
 572                                         "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
 573                                         db_strerror(rc), rc, 0 );
 574                         }
 575                 }
 576
 577                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 578                 bdb->bi_dbenv = NULL;
 579                 if( rc != 0 ) {
 580                         Debug( LDAP_DEBUG_ANY,
 581                                 "bdb_db_close: close failed: %s (%d)\n",
 582                                 db_strerror(rc), rc, 0 );
 583                         return rc;
 584                 }
 585         }
 586
 587         rc = alock_close( &bdb->bi_alock_info );
 588         if( rc != 0 ) {
 589                 Debug( LDAP_DEBUG_ANY,
 590                         "bdb_db_close: alock_close failed\n", 0, 0, 0 );
 591                 return -1;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static int
 598 bdb_db_destroy( BackendDB *be )
 599 {
 600         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 601
 602         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 603         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 604
 605         bdb_attr_index_destroy( bdb->bi_attrs );
 606
 607         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 608         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_mutex );
 609         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 610 #ifdef BDB_HIER
 611         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 612 #endif
 613         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 614         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 615         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 616         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 617
 618         ch_free( bdb );
 619         be->be_private = NULL;
 620
 621         return 0;
 622 }
 623
 624 int
 625 bdb_back_initialize(
 626         BackendInfo     *bi )
 627 {
 628         int rc;
 629
 630         static char *controls[] = {
 631                 LDAP_CONTROL_ASSERT,
 632                 LDAP_CONTROL_MANAGEDSAIT,
 633                 LDAP_CONTROL_NOOP,
 634                 LDAP_CONTROL_PAGEDRESULTS,
 635 #ifdef LDAP_CONTROL_SUBENTRIES
 636                 LDAP_CONTROL_SUBENTRIES,
 637 #endif
 638 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 639                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 640 #endif
 641                 NULL
 642         };
 643
 644         /* initialize the underlying database system */
 645         Debug( LDAP_DEBUG_TRACE,
 646                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 647                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 648
 649         bi->bi_flags |=
 650                 SLAP_BFLAG_INCREMENT |
 651 #ifdef BDB_SUBENTRIES
 652                 SLAP_BFLAG_SUBENTRIES |
 653 #endif
 654                 SLAP_BFLAG_ALIASES |
 655                 SLAP_BFLAG_REFERRALS;
 656
 657         bi->bi_controls = controls;
 658
 659         {       /* version check */
 660                 int major, minor, patch, ver;
 661                 char *version = db_version( &major, &minor, &patch );
 662 #ifdef HAVE_EBCDIC
 663                 char v2[1024];
 664
 665                 /* All our stdio does an ASCII to EBCDIC conversion on
 666                  * the output. Strings from the BDB library are already
 667                  * in EBCDIC; we have to go back and forth...
 668                  */
 669                 strcpy( v2, version );
 670                 __etoa( v2 );
 671                 version = v2;
 672 #endif
 673
 674                 ver = (major << 24) | (minor << 16) | patch;
 675                 if( ver != DB_VERSION_FULL ) {
 676                         /* fail if a versions don't match */
 677                         Debug( LDAP_DEBUG_ANY,
 678                                 LDAP_XSTRING(bdb_back_initialize) ": "
 679                                 "BDB library version mismatch:"
 680                                 " expected " DB_VERSION_STRING ","
 681                                 " got %s\n", version, 0, 0 );
 682                         return -1;
 683                 }
 684
 685                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 686                         ": %s\n", version, 0, 0 );
 687         }
 688
 689         db_env_set_func_free( ber_memfree );
 690         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 691         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 692 #ifndef NO_THREAD
 693         /* This is a no-op on a NO_THREAD build. Leave the default
 694          * alone so that BDB will sleep on interprocess conflicts.
 695          */
 696         db_env_set_func_yield( ldap_pvt_thread_yield );
 697 #endif
 698
 699         bi->bi_open = 0;
 700         bi->bi_close = 0;
 701         bi->bi_config = 0;
 702         bi->bi_destroy = 0;
 703
 704         bi->bi_db_init = bdb_db_init;
 705         bi->bi_db_config = config_generic_wrapper;
 706         bi->bi_db_open = bdb_db_open;
 707         bi->bi_db_close = bdb_db_close;
 708         bi->bi_db_destroy = bdb_db_destroy;
 709
 710         bi->bi_op_add = bdb_add;
 711         bi->bi_op_bind = bdb_bind;
 712         bi->bi_op_compare = bdb_compare;
 713         bi->bi_op_delete = bdb_delete;
 714         bi->bi_op_modify = bdb_modify;
 715         bi->bi_op_modrdn = bdb_modrdn;
 716         bi->bi_op_search = bdb_search;
 717
 718         bi->bi_op_unbind = 0;
 719
 720         bi->bi_extended = bdb_extended;
 721
 722         bi->bi_chk_referrals = bdb_referrals;
 723         bi->bi_operational = bdb_operational;
 724         bi->bi_has_subordinates = bdb_hasSubordinates;
 725         bi->bi_entry_release_rw = bdb_entry_release;
 726         bi->bi_entry_get_rw = bdb_entry_get;
 727
 728         /*
 729          * hooks for slap tools
 730          */
 731         bi->bi_tool_entry_open = bdb_tool_entry_open;
 732         bi->bi_tool_entry_close = bdb_tool_entry_close;
 733         bi->bi_tool_entry_first = bdb_tool_entry_next;
 734         bi->bi_tool_entry_next = bdb_tool_entry_next;
 735         bi->bi_tool_entry_get = bdb_tool_entry_get;
 736         bi->bi_tool_entry_put = bdb_tool_entry_put;
 737         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 738         bi->bi_tool_sync = 0;
 739         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 740         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 741         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 742
 743         bi->bi_connection_init = 0;
 744         bi->bi_connection_destroy = 0;
 745
 746         rc = bdb_back_init_cf( bi );
 747
 748         return rc;
 749 }
 750
 751 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 752         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 753
 754 /* conditionally define the init_module() function */
 755 #ifdef BDB_HIER
 756 SLAP_BACKEND_INIT_MODULE( hdb )
 757 #else /* !BDB_HIER */
 758 SLAP_BACKEND_INIT_MODULE( bdb )
 759 #endif /* !BDB_HIER */
 760
 761 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 762