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 #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
  63         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  64         bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
  65         bdb->bi_search_stack = NULL;
  66
  67         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  68         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  69 #ifdef BDB_HIER
  70         ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
  71 #endif
  72         ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_mutex );
  73         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
  74         ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
  75         ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
  76         ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
  77
  78         be->be_private = bdb;
  79         be->be_cf_ocs = be->bd_info->bi_cf_ocs;
  80
  81         return 0;
  82 }
  83
  84 static int
  85 bdb_db_close( BackendDB *be );
  86
  87 static int
  88 bdb_db_open( BackendDB *be )
  89 {
  90         int rc, i;
  91         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  92         struct stat stat1, stat2;
  93         u_int32_t flags;
  94         char path[MAXPATHLEN];
  95         char *dbhome;
  96         int do_recover = 0, do_alock_recover = 0, open_env = 1, got_env = 0;
  97
  98         if ( be->be_suffix == NULL ) {
  99                 Debug( LDAP_DEBUG_ANY,
 100                         "bdb_db_open: need suffix\n",
 101                         0, 0, 0 );
 102                 return -1;
 103         }
 104
 105         Debug( LDAP_DEBUG_ARGS,
 106                 "bdb_db_open: %s\n",
 107                 be->be_suffix[0].bv_val, 0, 0 );
 108
 109 #ifndef BDB_MULTIPLE_SUFFIXES
 110         if ( be->be_suffix[1].bv_val ) {
 111         Debug( LDAP_DEBUG_ANY,
 112                 "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
 113                 return -1;
 114         }
 115 #endif
 116
 117         /* Check existence of dbenv_home. Any error means trouble */
 118         rc = stat( bdb->bi_dbenv_home, &stat1 );
 119         if( rc !=0 ) {
 120                 Debug( LDAP_DEBUG_ANY,
 121                         "bdb_db_open: Cannot access database directory %s (%d)\n",
 122                         bdb->bi_dbenv_home, errno, 0 );
 123                         return -1;
 124         }
 125
 126         /* Perform database use arbitration/recovery logic */
 127         rc = alock_open( &bdb->bi_alock_info,
 128                                 "slapd",
 129                                 bdb->bi_dbenv_home,
 130                                 slapMode & SLAP_TOOL_READONLY ?
 131                                 ALOCK_LOCKED : ALOCK_UNIQUE );
 132
 133         if( rc == ALOCK_RECOVER ) {
 134                 Debug( LDAP_DEBUG_ANY,
 135                         "bdb_db_open: unclean shutdown detected;"
 136                         " attempting recovery.\n",
 137                         0, 0, 0 );
 138                 do_alock_recover = 1;
 139                 do_recover = 1;
 140         } else if( rc == ALOCK_BUSY ) {
 141                 Debug( LDAP_DEBUG_ANY,
 142                         "bdb_db_open: database already in use\n",
 143                         0, 0, 0 );
 144                 return -1;
 145         } else if( rc != ALOCK_CLEAN ) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "bdb_db_open: alock package is unstable\n",
 148                         0, 0, 0 );
 149                 return -1;
 150         }
 151
 152         /*
 153          * The DB_CONFIG file may have changed. If so, recover the
 154          * database so that new settings are put into effect. Also
 155          * note the possible absence of DB_CONFIG in the log.
 156          */
 157         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 158                 if ( !do_recover ) {
 159                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 160                         *ptr++ = LDAP_DIRSEP[0];
 161                         strcpy( ptr, "__db.001" );
 162                         if( stat( path, &stat2 ) == 0 ) {
 163                                 if( stat2.st_mtime <= stat1.st_mtime ) {
 164                                         Debug( LDAP_DEBUG_ANY,
 165                                                 "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
 166                                                 "Performing database recovery to activate new settings.\n",
 167                                                 be->be_suffix[0].bv_val, 0, 0 );
 168                                         do_recover = 1;
 169                                 }
 170                         }
 171                 }
 172         }
 173         else {
 174                 Debug( LDAP_DEBUG_ANY,
 175                         "bdb_db_open: Warning - No DB_CONFIG file found "
 176                         "in directory %s: (%d)\n"
 177                         "Expect poor performance for suffix %s.\n",
 178                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 179         }
 180
 181         rc = db_env_create( &bdb->bi_dbenv, 0 );
 182         if( rc != 0 ) {
 183                 Debug( LDAP_DEBUG_ANY,
 184                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 185                         db_strerror(rc), rc, 0 );
 186                 goto fail;
 187         }
 188
 189         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 190         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 191
 192         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 193
 194         /* One long-lived TXN per thread, two TXNs per write op */
 195         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 196
 197         if( bdb->bi_dbenv_xflags != 0 ) {
 198                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 199                         bdb->bi_dbenv_xflags, 1);
 200                 if( rc != 0 ) {
 201                         Debug( LDAP_DEBUG_ANY,
 202                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 203                                 db_strerror(rc), rc, 0 );
 204                         goto fail;
 205                 }
 206         }
 207
 208 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 209
 210 #ifdef HAVE_EBCDIC
 211         strcpy( path, bdb->bi_dbenv_home );
 212         __atoe( path );
 213         dbhome = path;
 214 #else
 215         dbhome = bdb->bi_dbenv_home;
 216 #endif
 217
 218         Debug( LDAP_DEBUG_TRACE,
 219                 "bdb_db_open: dbenv_open(%s)\n",
 220                 bdb->bi_dbenv_home, 0, 0);
 221
 222         /* Check if there is a usable existing environment */
 223         flags = DB_JOINENV | DB_THREAD;
 224
 225         rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 226                 flags, bdb->bi_dbenv_mode );
 227         if( rc == 0 ) {
 228                 int flags_ok = 0;
 229
 230                 got_env = 1;
 231
 232                 rc = bdb->bi_dbenv->get_open_flags( bdb->bi_dbenv, &flags );
 233                 if ( rc == 0 ) {
 234                         int flag2 = flags & BDB_TXN_FLAGS;
 235
 236                         /* In quick mode, none of these flags are allowed */
 237                         if ( slapMode & SLAP_TOOL_QUICK ) {
 238                                 if ( !flag2 )
 239                                         flags_ok = 1;
 240                         } else {
 241                         /* In normal mode, all of these flags are required */
 242                                 if ( flag2 == BDB_TXN_FLAGS )
 243                                         flags_ok = 1;
 244                         }
 245                 }
 246
 247                 /* In Quick mode, we cannot Recover... */
 248                 if ( slapMode & SLAP_TOOL_QUICK ) {
 249                         /* If we need to recover but we had no TXNs, just fail */
 250                         if ( do_recover && flags_ok ) {
 251                                 Debug( LDAP_DEBUG_ANY,
 252                                         "bdb_db_open: Database cannot be recovered. "
 253                                         "Restore from backup!\n", 0, 0, 0);
 254                                 rc = -1;
 255                                 goto fail;
 256                         }
 257                         /* We need to recover, and we had TXN support before:
 258                          * Close this env, open a new one with recovery flags.
 259                          */
 260                         if ( do_recover ) {
 261                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 262                                 bdb->bi_dbenv = NULL;
 263                                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 264                                 if( rc != 0 ) {
 265                                         Debug( LDAP_DEBUG_ANY,
 266                                                 "bdb_db_open: db_env_create failed: %s (%d)\n",
 267                                                 db_strerror(rc), rc, 0 );
 268                                         goto fail;
 269                                 }
 270                                 bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv,
 271                                         be->be_suffix[0].bv_val );
 272                                 bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 273                                 rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 274                                         flags | DB_RECOVER, bdb->bi_dbenv_mode );
 275                                 if( rc != 0 ) {
 276                                         Debug( LDAP_DEBUG_ANY,
 277                                                 "bdb_db_open: recovery failed: %s (%d)\n",
 278                                                 db_strerror(rc), rc, 0 );
 279                                         goto fail;
 280                                 }
 281                                 do_recover = 0;
 282                         }
 283                         /* Prev environment had TXN support, get rid of it */
 284                         if ( !flags_ok ) {
 285                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 286                                 bdb->bi_dbenv = NULL;
 287                                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 288                                 if( rc != 0 ) {
 289                                         Debug( LDAP_DEBUG_ANY,
 290                                                 "bdb_db_open: db_env_create failed: %s (%d)\n",
 291                                                 db_strerror(rc), rc, 0 );
 292                                         goto fail;
 293                                 }
 294                                 bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, 0 );
 295                                 bdb->bi_dbenv = NULL;
 296                         }
 297                 /* Normal TXN mode */
 298                 } else {
 299                         /* If we need to recover but we had no TXNs, just fail */
 300                         if ( do_recover && !flags_ok ) {
 301                                 Debug( LDAP_DEBUG_ANY,
 302                                         "bdb_db_open: Database cannot be recovered. "
 303                                         "Restore from backup!\n", 0, 0, 0);
 304                                 rc = -1;
 305                                 goto fail;
 306                         }
 307                         /* Prev environment had no TXN support, close it */
 308                         if ( !flags_ok ) {
 309                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 310                                 bdb->bi_dbenv = NULL;
 311                                 do_recover = 1;
 312                         }
 313                 }
 314
 315                 if ( flags_ok && !do_recover ) {
 316                         /* This environment is fine, don't reopen it */
 317                         open_env = 0;
 318                 } else {
 319                         /* Create a new env that can take the desired settings */
 320                         if ( bdb->bi_dbenv != NULL ) {
 321                                 bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 322                                 bdb->bi_dbenv = NULL;
 323                         }
 324                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 325                         if( rc != 0 ) {
 326                                 Debug( LDAP_DEBUG_ANY,
 327                                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 328                                         db_strerror(rc), rc, 0 );
 329                                 goto fail;
 330                         }
 331
 332                         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 333                         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 334                         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 335
 336                         /* One long-lived TXN per thread, two TXNs per write op */
 337                         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 338
 339                         if( bdb->bi_dbenv_xflags != 0 ) {
 340                                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 341                                         bdb->bi_dbenv_xflags, 1);
 342                                 if( rc != 0 ) {
 343                                         Debug( LDAP_DEBUG_ANY,
 344                                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 345                                                 db_strerror(rc), rc, 0 );
 346                                         goto fail;
 347                                 }
 348                         }
 349                 }
 350         }
 351
 352         /* If we need to recover but there was no existing environment,
 353          * then we assume that someone has already manually recovered using
 354          * db_recover. Just ignore it.
 355          */
 356         if ( do_recover && !got_env ) {
 357                 do_recover = 0;
 358                 Debug( LDAP_DEBUG_TRACE,
 359                         "bdb_db_open: Recovery needed but environment is missing - "
 360                         "assuming recovery was done manually...\n", 0, 0, 0 );
 361         }
 362
 363         if ( open_env ) {
 364                 flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 365                 if ( !( slapMode & SLAP_TOOL_QUICK ))
 366                         flags |= BDB_TXN_FLAGS;
 367
 368                 if ( do_recover )
 369                         flags |= DB_RECOVER;
 370
 371                 /* If a key was set, use shared memory for the BDB environment */
 372                 if ( bdb->bi_shm_key ) {
 373                         bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 374                         flags |= DB_SYSTEM_MEM;
 375                 }
 376
 377                 rc = bdb->bi_dbenv->open( bdb->bi_dbenv, dbhome,
 378                         flags, bdb->bi_dbenv_mode );
 379                 if( rc != 0 ) {
 380                         Debug( LDAP_DEBUG_ANY,
 381                                 "bdb_db_open: dbenv_open failed: %s (%d)\n",
 382                                 db_strerror(rc), rc, 0 );
 383                         goto fail;
 384                 }
 385         }
 386
 387         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 388                 Debug( LDAP_DEBUG_ANY,
 389                         "bdb_db_open: alock_recover failed\n",
 390                         0, 0, 0 );
 391                 rc = -1;
 392                 goto fail;
 393         }
 394
 395 #ifdef SLAP_ZONE_ALLOC
 396         if ( bdb->bi_cache.c_maxsize ) {
 397                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 398                                                                 SLAP_ZONE_INITSIZE,
 399                                                                 SLAP_ZONE_MAXSIZE,
 400                                                                 SLAP_ZONE_DELTA,
 401                                                                 SLAP_ZONE_SIZE);
 402         }
 403 #endif
 404
 405         if ( bdb->bi_idl_cache_max_size ) {
 406                 bdb->bi_idl_tree = NULL;
 407                 bdb->bi_idl_cache_size = 0;
 408         }
 409
 410         flags = DB_THREAD | bdb->bi_db_opflags;
 411
 412 #ifdef DB_AUTO_COMMIT
 413         if ( !( slapMode & SLAP_TOOL_QUICK ))
 414                 flags |= DB_AUTO_COMMIT;
 415 #endif
 416
 417         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 418                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 419
 420         /* open (and create) main database */
 421         for( i = 0; bdbi_databases[i].name; i++ ) {
 422                 struct bdb_db_info *db;
 423
 424                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 425
 426                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 427                 if( rc != 0 ) {
 428                         Debug( LDAP_DEBUG_ANY,
 429                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 430                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 431                         goto fail;
 432                 }
 433
 434                 if( i == BDB_ID2ENTRY ) {
 435                         if ( slapMode & SLAP_TOOL_MODE )
 436                                 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 437                                         DB_PRIORITY_VERY_LOW );
 438
 439                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 440                                 BDB_ID2ENTRY_PAGESIZE );
 441                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 442                                 flags |= DB_RDONLY;
 443                         } else {
 444                                 flags |= DB_CREATE;
 445                         }
 446                 } else {
 447                         rc = db->bdi_db->set_flags( db->bdi_db,
 448                                 DB_DUP | DB_DUPSORT );
 449 #ifndef BDB_HIER
 450                         if ( slapMode & SLAP_TOOL_READONLY ) {
 451                                 flags |= DB_RDONLY;
 452                         } else {
 453                                 flags |= DB_CREATE;
 454                         }
 455 #else
 456                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 457                                 flags |= DB_RDONLY;
 458                         } else {
 459                                 flags |= DB_CREATE;
 460                         }
 461 #endif
 462                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 463                                 BDB_PAGESIZE );
 464                 }
 465
 466 #ifdef HAVE_EBCDIC
 467                 strcpy( path, bdbi_databases[i].file );
 468                 __atoe( path );
 469                 rc = DB_OPEN( db->bdi_db,
 470                         path,
 471                 /*      bdbi_databases[i].name, */ NULL,
 472                         bdbi_databases[i].type,
 473                         bdbi_databases[i].flags | flags,
 474                         bdb->bi_dbenv_mode );
 475 #else
 476                 rc = DB_OPEN( db->bdi_db,
 477                         bdbi_databases[i].file,
 478                 /*      bdbi_databases[i].name, */ NULL,
 479                         bdbi_databases[i].type,
 480                         bdbi_databases[i].flags | flags,
 481                         bdb->bi_dbenv_mode );
 482 #endif
 483
 484                 if ( rc != 0 ) {
 485                         char    buf[SLAP_TEXT_BUFLEN];
 486
 487                         snprintf( buf, sizeof(buf), "%s/%s",
 488                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 489                         Debug( LDAP_DEBUG_ANY,
 490                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 491                                 buf, db_strerror(rc), rc );
 492                         db->bdi_db->close( db->bdi_db, 0 );
 493                         goto fail;
 494                 }
 495
 496                 flags &= ~(DB_CREATE | DB_RDONLY);
 497                 db->bdi_name = bdbi_databases[i].name;
 498                 bdb->bi_databases[i] = db;
 499         }
 500
 501         bdb->bi_databases[i] = NULL;
 502         bdb->bi_ndatabases = i;
 503
 504         /* get nextid */
 505         rc = bdb_last_id( be, NULL );
 506         if( rc != 0 ) {
 507                 Debug( LDAP_DEBUG_ANY,
 508                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 509                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 510                 goto fail;
 511         }
 512
 513         if ( !( slapMode & SLAP_TOOL_QUICK )) {
 514                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 515         }
 516
 517         bdb->bi_flags |= BDB_IS_OPEN;
 518
 519         return 0;
 520
 521 fail:
 522         bdb_db_close( be );
 523         return rc;
 524 }
 525
 526 static int
 527 bdb_db_close( BackendDB *be )
 528 {
 529         int rc;
 530         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 531         struct bdb_db_info *db;
 532         bdb_idl_cache_entry_t *entry, *next_entry;
 533
 534         bdb->bi_flags &= ~BDB_IS_OPEN;
 535
 536         ber_bvarray_free( bdb->bi_db_config );
 537         bdb->bi_db_config = NULL;
 538
 539         while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
 540                 db = bdb->bi_databases[bdb->bi_ndatabases];
 541                 rc = db->bdi_db->close( db->bdi_db, 0 );
 542                 /* Lower numbered names are not strdup'd */
 543                 if( bdb->bi_ndatabases >= BDB_NDB )
 544                         free( db->bdi_name );
 545                 free( db );
 546         }
 547         free( bdb->bi_databases );
 548         bdb->bi_databases = NULL;
 549
 550         bdb_cache_release_all (&bdb->bi_cache);
 551
 552         if ( bdb->bi_idl_cache_max_size ) {
 553                 avl_free( bdb->bi_idl_tree, NULL );
 554                 bdb->bi_idl_tree = NULL;
 555                 entry = bdb->bi_idl_lru_head;
 556                 while ( entry != NULL ) {
 557                         next_entry = entry->idl_lru_next;
 558                         if ( entry->idl )
 559                                 free( entry->idl );
 560                         free( entry->kstr.bv_val );
 561                         free( entry );
 562                         entry = next_entry;
 563                 }
 564                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 565         }
 566
 567         if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_dbenv ) {
 568                 XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 569                 bdb->bi_cache.c_locker = 0;
 570         }
 571
 572         /* close db environment */
 573         if( bdb->bi_dbenv ) {
 574                 /* force a checkpoint, but not if we were ReadOnly,
 575                  * and not in Quick mode since there are no transactions there.
 576                  */
 577                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 578                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 579                         if( rc != 0 ) {
 580                                 Debug( LDAP_DEBUG_ANY,
 581                                         "bdb_db_close: txn_checkpoint failed: %s (%d)\n",
 582                                         db_strerror(rc), rc, 0 );
 583                         }
 584                 }
 585
 586                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 587                 bdb->bi_dbenv = NULL;
 588                 if( rc != 0 ) {
 589                         Debug( LDAP_DEBUG_ANY,
 590                                 "bdb_db_close: close failed: %s (%d)\n",
 591                                 db_strerror(rc), rc, 0 );
 592                         return rc;
 593                 }
 594         }
 595
 596         rc = alock_close( &bdb->bi_alock_info );
 597         if( rc != 0 ) {
 598                 Debug( LDAP_DEBUG_ANY,
 599                         "bdb_db_close: alock_close failed\n", 0, 0, 0 );
 600                 return -1;
 601         }
 602
 603         return 0;
 604 }
 605
 606 static int
 607 bdb_db_destroy( BackendDB *be )
 608 {
 609         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 610
 611         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 612         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 613
 614         bdb_attr_index_destroy( bdb );
 615
 616         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 617         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_mutex );
 618         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 619 #ifdef BDB_HIER
 620         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 621 #endif
 622         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 623         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 624         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 625         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 626
 627         ch_free( bdb );
 628         be->be_private = NULL;
 629
 630         return 0;
 631 }
 632
 633 int
 634 bdb_back_initialize(
 635         BackendInfo     *bi )
 636 {
 637         int rc;
 638
 639         static char *controls[] = {
 640                 LDAP_CONTROL_ASSERT,
 641                 LDAP_CONTROL_MANAGEDSAIT,
 642                 LDAP_CONTROL_NOOP,
 643                 LDAP_CONTROL_PAGEDRESULTS,
 644                 LDAP_CONTROL_SUBENTRIES,
 645                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 646                 NULL
 647         };
 648
 649         /* initialize the underlying database system */
 650         Debug( LDAP_DEBUG_TRACE,
 651                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 652                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 653
 654         bi->bi_flags |=
 655                 SLAP_BFLAG_INCREMENT |
 656 #ifdef BDB_SUBENTRIES
 657                 SLAP_BFLAG_SUBENTRIES |
 658 #endif
 659                 SLAP_BFLAG_ALIASES |
 660                 SLAP_BFLAG_REFERRALS;
 661
 662         bi->bi_controls = controls;
 663
 664         {       /* version check */
 665                 int major, minor, patch, ver;
 666                 char *version = db_version( &major, &minor, &patch );
 667 #ifdef HAVE_EBCDIC
 668                 char v2[1024];
 669
 670                 /* All our stdio does an ASCII to EBCDIC conversion on
 671                  * the output. Strings from the BDB library are already
 672                  * in EBCDIC; we have to go back and forth...
 673                  */
 674                 strcpy( v2, version );
 675                 __etoa( v2 );
 676                 version = v2;
 677 #endif
 678
 679                 ver = (major << 24) | (minor << 16) | patch;
 680                 if( ver != DB_VERSION_FULL ) {
 681                         /* fail if a versions don't match */
 682                         Debug( LDAP_DEBUG_ANY,
 683                                 LDAP_XSTRING(bdb_back_initialize) ": "
 684                                 "BDB library version mismatch:"
 685                                 " expected " DB_VERSION_STRING ","
 686                                 " got %s\n", version, 0, 0 );
 687                         return -1;
 688                 }
 689
 690                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 691                         ": %s\n", version, 0, 0 );
 692         }
 693
 694         db_env_set_func_free( ber_memfree );
 695         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 696         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 697 #ifndef NO_THREAD
 698         /* This is a no-op on a NO_THREAD build. Leave the default
 699          * alone so that BDB will sleep on interprocess conflicts.
 700          */
 701         db_env_set_func_yield( ldap_pvt_thread_yield );
 702 #endif
 703
 704         bi->bi_open = 0;
 705         bi->bi_close = 0;
 706         bi->bi_config = 0;
 707         bi->bi_destroy = 0;
 708
 709         bi->bi_db_init = bdb_db_init;
 710         bi->bi_db_config = config_generic_wrapper;
 711         bi->bi_db_open = bdb_db_open;
 712         bi->bi_db_close = bdb_db_close;
 713         bi->bi_db_destroy = bdb_db_destroy;
 714
 715         bi->bi_op_add = bdb_add;
 716         bi->bi_op_bind = bdb_bind;
 717         bi->bi_op_compare = bdb_compare;
 718         bi->bi_op_delete = bdb_delete;
 719         bi->bi_op_modify = bdb_modify;
 720         bi->bi_op_modrdn = bdb_modrdn;
 721         bi->bi_op_search = bdb_search;
 722
 723         bi->bi_op_unbind = 0;
 724
 725         bi->bi_extended = bdb_extended;
 726
 727         bi->bi_chk_referrals = bdb_referrals;
 728         bi->bi_operational = bdb_operational;
 729         bi->bi_has_subordinates = bdb_hasSubordinates;
 730         bi->bi_entry_release_rw = bdb_entry_release;
 731         bi->bi_entry_get_rw = bdb_entry_get;
 732
 733         /*
 734          * hooks for slap tools
 735          */
 736         bi->bi_tool_entry_open = bdb_tool_entry_open;
 737         bi->bi_tool_entry_close = bdb_tool_entry_close;
 738         bi->bi_tool_entry_first = bdb_tool_entry_next;
 739         bi->bi_tool_entry_next = bdb_tool_entry_next;
 740         bi->bi_tool_entry_get = bdb_tool_entry_get;
 741         bi->bi_tool_entry_put = bdb_tool_entry_put;
 742         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 743         bi->bi_tool_sync = 0;
 744         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 745         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 746         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 747
 748         bi->bi_connection_init = 0;
 749         bi->bi_connection_destroy = 0;
 750
 751         rc = bdb_back_init_cf( bi );
 752
 753         return rc;
 754 }
 755
 756 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 757         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 758
 759 /* conditionally define the init_module() function */
 760 #ifdef BDB_HIER
 761 SLAP_BACKEND_INIT_MODULE( hdb )
 762 #else /* !BDB_HIER */
 763 SLAP_BACKEND_INIT_MODULE( bdb )
 764 #endif /* !BDB_HIER */
 765
 766 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 767