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