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         ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_mutex );
  70         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
  71         ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
  72
  73         be->be_private = bdb;
  74         be->be_cf_table = be->bd_info->bi_cf_table;
  75
  76         return 0;
  77 }
  78
  79 /*
  80  * Unconditionally perform a database recovery. Only works on
  81  * databases that were previously opened with transactions and
  82  * logs enabled.
  83  */
  84 static int
  85 bdb_do_recovery( BackendDB *be )
  86 {
  87         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  88         DB_ENV  *re_dbenv;
  89         u_int32_t flags;
  90         int             rc;
  91         char    path[MAXPATHLEN], *ptr;
  92
  93         /* Create and init the recovery environment */
  94         rc = db_env_create( &re_dbenv, 0 );
  95         if( rc != 0 ) {
  96                 Debug( LDAP_DEBUG_ANY,
  97                         "bdb_do_recovery: db_env_create failed: %s (%d)\n",
  98                         db_strerror(rc), rc, 0 );
  99                 return rc;
 100         }
 101         re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
 102         re_dbenv->set_errcall( re_dbenv, bdb_errcall );
 103         (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_RECOVERY, 1);
 104 #if DB_VERSION_FULL < 0x04030000
 105         (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_CHKPOINT, 1);
 106 #else
 107         re_dbenv->set_msgcall( re_dbenv, bdb_msgcall );
 108 #endif
 109
 110         flags = DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |
 111                 DB_INIT_TXN | DB_USE_ENVIRON | DB_RECOVER;
 112
 113         /* Open the environment, which will also perform the recovery */
 114 #ifdef HAVE_EBCDIC
 115         strcpy( path, bdb->bi_dbenv_home );
 116         __atoe( path );
 117         rc = re_dbenv->open( re_dbenv,
 118                 path,
 119                 flags,
 120                 bdb->bi_dbenv_mode );
 121 #else
 122         rc = re_dbenv->open( re_dbenv,
 123                 bdb->bi_dbenv_home,
 124                 flags,
 125                 bdb->bi_dbenv_mode );
 126 #endif
 127         if( rc != 0 ) {
 128                 Debug( LDAP_DEBUG_ANY,
 129                         "bdb_do_recovery: dbenv_open failed: %s (%d)\n",
 130                         db_strerror(rc), rc, 0 );
 131                 return rc;
 132         }
 133         (void) re_dbenv->close( re_dbenv, 0 );
 134
 135         /* By convention we reset the mtime for id2entry.bdb to the current time */
 136         ptr = lutil_strcopy( path, bdb->bi_dbenv_home);
 137         *ptr++ = LDAP_DIRSEP[0];
 138         strcpy( ptr, bdbi_databases[0].file);
 139         (void) utime( path, NULL);
 140
 141         return 0;
 142 }
 143
 144 /*
 145  * Database recovery logic:
 146  * This function is called whenever the database appears to have been
 147  * shut down uncleanly, as determined by the alock functions.
 148  * Because of the -q function in slapadd, there is also the possibility
 149  * that the shutdown happened when transactions weren't being used and
 150  * the database is likely to be corrupt. The function checks for this
 151  * condition by examining the environment to make sure it had previously
 152  * been opened with transactions enabled. If this is the case, the
 153  * database is recovered as usual. If transactions were not enabled,
 154  * then this function will return a fail.
 155  */
 156 static int
 157 bdb_db_recover( BackendDB *be )
 158 {
 159         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 160         DB_ENV  *re_dbenv;
 161         u_int32_t flags;
 162         int             rc;
 163 #ifdef HAVE_EBCDIC
 164         char    path[MAXPATHLEN];
 165 #endif
 166
 167         /* Create the recovery environment, then open it.
 168          * We use the DB_JOIN in combination with a flags value of
 169          * zero so we join an existing environment and can read the
 170          * value of the flags that were used the last time the
 171          * environment was opened. DB_CREATE is added because the
 172          * open would fail if the only thing that had been done
 173          * was an open with transactions and logs disabled.
 174          */
 175         rc = db_env_create( &re_dbenv, 0 );
 176         if( rc != 0 ) {
 177                 Debug( LDAP_DEBUG_ANY,
 178                         "bdb_db_recover: db_env_create failed: %s (%d)\n",
 179                         db_strerror(rc), rc, 0 );
 180                 return rc;
 181         }
 182         re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
 183         re_dbenv->set_errcall( re_dbenv, bdb_errcall );
 184
 185         Debug( LDAP_DEBUG_TRACE,
 186                 "bdb_db_recover: dbenv_open(%s)\n",
 187                 bdb->bi_dbenv_home, 0, 0);
 188
 189 #ifdef HAVE_EBCDIC
 190         strcpy( path, bdb->bi_dbenv_home );
 191         __atoe( path );
 192         rc = re_dbenv->open( re_dbenv,
 193                 path,
 194                 DB_JOINENV,
 195                 bdb->bi_dbenv_mode );
 196 #else
 197         rc = re_dbenv->open( re_dbenv,
 198                 bdb->bi_dbenv_home,
 199                 DB_JOINENV,
 200                 bdb->bi_dbenv_mode );
 201 #endif
 202
 203         if( rc == ENOENT ) {
 204                 goto re_exit;
 205         }
 206         else if( rc != 0 ) {
 207                 Debug( LDAP_DEBUG_ANY,
 208                         "bdb_db_recover: dbenv_open failed: %s (%d)\n",
 209                         db_strerror(rc), rc, 0 );
 210                 return rc;
 211         }
 212
 213         /*
 214          * Check the flags that had been used in the previous open.
 215          * The environment needed to have had both
 216          * DB_INIT_LOG and DB_INIT_TXN set for us to be willing to
 217          * recover the database. Otherwise the an app failed while running
 218          * without transactions and logs enabled and the dn2id and id2entry
 219          * mapping is likely to be corrupt.
 220          */
 221         rc = re_dbenv->get_open_flags( re_dbenv, &flags );
 222         if( rc != 0 ) {
 223                 Debug( LDAP_DEBUG_ANY,
 224                         "bdb_db_recover: get_open_flags failed: %s (%d)\n",
 225                         db_strerror(rc), rc, 0 );
 226                 return rc;
 227         }
 228
 229         (void) re_dbenv->close( re_dbenv, 0 );
 230
 231         if( (flags & DB_INIT_LOG) && (flags & DB_INIT_TXN) ) {
 232                 return bdb_do_recovery( be );
 233         }
 234
 235 re_exit:
 236         Debug( LDAP_DEBUG_ANY,
 237                 "bdb_db_recover: Database cannot be recovered. "\
 238                 "Restore from backup!\n", 0, 0, 0);
 239         return -1;
 240
 241 }
 242
 243
 244 static int
 245 bdb_db_open( BackendDB *be )
 246 {
 247         int rc, i;
 248         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 249         struct stat stat1, stat2;
 250         u_int32_t flags;
 251         char path[MAXPATHLEN];
 252         char *ptr;
 253
 254         Debug( LDAP_DEBUG_ARGS,
 255                 "bdb_db_open: %s\n",
 256                 be->be_suffix[0].bv_val, 0, 0 );
 257
 258 #ifndef BDB_MULTIPLE_SUFFIXES
 259         if ( be->be_suffix[1].bv_val ) {
 260         Debug( LDAP_DEBUG_ANY,
 261                 "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
 262                 return -1;
 263         }
 264 #endif
 265
 266         /* Check existence of dbenv_home. Any error means trouble */
 267         rc = stat( bdb->bi_dbenv_home, &stat1 );
 268         if( rc !=0 ) {
 269                 Debug( LDAP_DEBUG_ANY,
 270                         "bdb_db_open: Cannot access database directory %s (%d)\n",
 271                         bdb->bi_dbenv_home, errno, 0 );
 272                         return -1;
 273         }
 274
 275         /* Perform database use arbitration/recovery logic */
 276         rc = alock_open( &bdb->bi_alock_info,
 277                                 "slapd",
 278                                 bdb->bi_dbenv_home,
 279                                 slapMode & SLAP_TOOL_READONLY ?
 280                                 ALOCK_LOCKED : ALOCK_UNIQUE );
 281
 282         if( rc == ALOCK_RECOVER ) {
 283                 Debug( LDAP_DEBUG_ANY,
 284                         "bdb_db_open: unclean shutdown detected;"
 285                         " attempting recovery.\n",
 286                         0, 0, 0 );
 287                 if( bdb_db_recover( be ) != 0 ) {
 288                         Debug( LDAP_DEBUG_ANY,
 289                                 "bdb_db_open: DB recovery failed.\n",
 290                                 0, 0, 0 );
 291                         return -1;
 292                 }
 293                 if( alock_recover (&bdb->bi_alock_info) != 0 ) {
 294                         Debug( LDAP_DEBUG_ANY,
 295                                 "bdb_db_open: alock_recover failed\n",
 296                                 0, 0, 0 );
 297                         return -1;
 298                 }
 299
 300         } else if( rc == ALOCK_BUSY ) {
 301                 Debug( LDAP_DEBUG_ANY,
 302                         "bdb_db_open: database already in use\n",
 303                         0, 0, 0 );
 304                 return -1;
 305         } else if( rc != ALOCK_CLEAN ) {
 306                 Debug( LDAP_DEBUG_ANY,
 307                         "bdb_db_open: alock package is unstable\n",
 308                         0, 0, 0 );
 309                 return -1;
 310         }
 311
 312         /*
 313          * The DB_CONFIG file may have changed. If so, recover the
 314          * database so that new settings are put into effect. Also
 315          * note the possible absence of DB_CONFIG in the log.
 316          */
 317         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 318                 ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 319                 *ptr++ = LDAP_DIRSEP[0];
 320                 strcpy( ptr, bdbi_databases[0].file);
 321                 if( stat( path, &stat2 ) == 0 ) {
 322                         if( stat2.st_mtime <= stat1.st_mtime ) {
 323                                 Debug( LDAP_DEBUG_ANY,
 324                                         "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
 325                                         "Performing database recovery to activate new settings.\n",
 326                                         be->be_suffix[0].bv_val, 0, 0 );
 327                                 if( bdb_do_recovery( be ) != 0) {
 328                                         Debug( LDAP_DEBUG_ANY,
 329                                                 "bdb_db_open: db recovery failed.\n",
 330                                                 0, 0, 0 );
 331                                         return -1;
 332                                 }
 333                         }
 334
 335                 }
 336         }
 337         else {
 338                 Debug( LDAP_DEBUG_ANY,
 339                         "bdb_db_open: Warning - No DB_CONFIG file found "
 340                         "in directory %s: (%d)\n"
 341                         "Expect poor performance for suffix %s.\n",
 342                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 343         }
 344
 345         flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 346         if ( !( slapMode & SLAP_TOOL_QUICK ))
 347                 flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN;
 348
 349         rc = db_env_create( &bdb->bi_dbenv, 0 );
 350         if( rc != 0 ) {
 351                 Debug( LDAP_DEBUG_ANY,
 352                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 353                         db_strerror(rc), rc, 0 );
 354                 return rc;
 355         }
 356
 357         /* If a key was set, use shared memory for the BDB environment */
 358         if ( bdb->bi_shm_key ) {
 359                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 360                 flags |= DB_SYSTEM_MEM;
 361         }
 362
 363         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 364         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 365         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 366
 367         /* One long-lived TXN per thread, two TXNs per write op */
 368         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 369
 370 #ifdef SLAP_ZONE_ALLOC
 371         if ( bdb->bi_cache.c_maxsize ) {
 372                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 373                                                                 SLAP_ZONE_INITSIZE,
 374                                                                 SLAP_ZONE_MAXSIZE,
 375                                                                 SLAP_ZONE_DELTA,
 376                                                                 SLAP_ZONE_SIZE);
 377         }
 378 #endif
 379
 380         if ( bdb->bi_idl_cache_max_size ) {
 381                 bdb->bi_idl_tree = NULL;
 382                 ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
 383                 ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
 384                 bdb->bi_idl_cache_size = 0;
 385         }
 386
 387         if( bdb->bi_dbenv_xflags != 0 ) {
 388                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 389                         bdb->bi_dbenv_xflags, 1);
 390                 if( rc != 0 ) {
 391                         Debug( LDAP_DEBUG_ANY,
 392                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 393                                 db_strerror(rc), rc, 0 );
 394                         return rc;
 395                 }
 396         }
 397
 398         Debug( LDAP_DEBUG_TRACE,
 399                 "bdb_db_open: dbenv_open(%s)\n",
 400                 bdb->bi_dbenv_home, 0, 0);
 401
 402 #ifdef HAVE_EBCDIC
 403         strcpy( path, bdb->bi_dbenv_home );
 404         __atoe( path );
 405         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 406                 path,
 407                 flags,
 408                 bdb->bi_dbenv_mode );
 409 #else
 410         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 411                 bdb->bi_dbenv_home,
 412                 flags,
 413                 bdb->bi_dbenv_mode );
 414 #endif
 415         if( rc != 0 ) {
 416                 Debug( LDAP_DEBUG_ANY,
 417                         "bdb_db_open: dbenv_open failed: %s (%d)\n",
 418                         db_strerror(rc), rc, 0 );
 419                 return rc;
 420         }
 421
 422         flags = DB_THREAD | bdb->bi_db_opflags;
 423
 424 #ifdef DB_AUTO_COMMIT
 425         if ( !( slapMode & SLAP_TOOL_QUICK ))
 426                 flags |= DB_AUTO_COMMIT;
 427 #endif
 428
 429         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 430                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 431
 432         /* open (and create) main database */
 433         for( i = 0; bdbi_databases[i].name; i++ ) {
 434                 struct bdb_db_info *db;
 435
 436                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 437
 438                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 439                 if( rc != 0 ) {
 440                         Debug( LDAP_DEBUG_ANY,
 441                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 442                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 443                         return rc;
 444                 }
 445
 446                 if( i == BDB_ID2ENTRY ) {
 447                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 448                                 BDB_ID2ENTRY_PAGESIZE );
 449                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 450                                 flags |= DB_RDONLY;
 451                         } else {
 452                                 flags |= DB_CREATE;
 453                         }
 454                 } else {
 455                         rc = db->bdi_db->set_flags( db->bdi_db,
 456                                 DB_DUP | DB_DUPSORT );
 457 #ifndef BDB_HIER
 458                         if ( slapMode & SLAP_TOOL_READONLY ) {
 459                                 flags |= DB_RDONLY;
 460                         } else {
 461                                 flags |= DB_CREATE;
 462                         }
 463 #else
 464                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 465                                 flags |= DB_RDONLY;
 466                         } else {
 467                                 flags |= DB_CREATE;
 468                         }
 469 #endif
 470                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 471                                 BDB_PAGESIZE );
 472                 }
 473
 474 #ifdef HAVE_EBCDIC
 475                 strcpy( path, bdbi_databases[i].file );
 476                 __atoe( path );
 477                 rc = DB_OPEN( db->bdi_db,
 478                         path,
 479                 /*      bdbi_databases[i].name, */ NULL,
 480                         bdbi_databases[i].type,
 481                         bdbi_databases[i].flags | flags,
 482                         bdb->bi_dbenv_mode );
 483 #else
 484                 rc = DB_OPEN( db->bdi_db,
 485                         bdbi_databases[i].file,
 486                 /*      bdbi_databases[i].name, */ NULL,
 487                         bdbi_databases[i].type,
 488                         bdbi_databases[i].flags | flags,
 489                         bdb->bi_dbenv_mode );
 490 #endif
 491
 492                 if ( rc != 0 ) {
 493                         char    buf[SLAP_TEXT_BUFLEN];
 494
 495                         snprintf( buf, sizeof(buf), "%s/%s",
 496                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 497                         Debug( LDAP_DEBUG_ANY,
 498                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 499                                 buf, db_strerror(rc), rc );
 500                         return rc;
 501                 }
 502
 503                 flags &= ~(DB_CREATE | DB_RDONLY);
 504                 db->bdi_name = bdbi_databases[i].name;
 505                 bdb->bi_databases[i] = db;
 506         }
 507
 508         bdb->bi_databases[i] = NULL;
 509         bdb->bi_ndatabases = i;
 510
 511         /* get nextid */
 512         rc = bdb_last_id( be, NULL );
 513         if( rc != 0 ) {
 514                 Debug( LDAP_DEBUG_ANY,
 515                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 516                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 517                 return rc;
 518         }
 519
 520         if ( !( slapMode & SLAP_TOOL_QUICK )) {
 521                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 522         }
 523
 524         if (( slapMode&SLAP_SERVER_MODE ) && ( bdb->bi_flags&BDB_HAS_CONFIG )) {
 525                 char    buf[SLAP_TEXT_BUFLEN];
 526                 FILE *f = fopen( bdb->bi_db_config_path, "r" );
 527                 struct berval bv;
 528
 529                 if ( f ) {
 530                         while ( fgets( buf, sizeof(buf), f )) {
 531                                 ber_str2bv( buf, 0, 1, &bv );
 532                                 if ( bv.bv_val[bv.bv_len-1] == '\n' ) {
 533                                         bv.bv_len--;
 534                                         bv.bv_val[bv.bv_len] = '\0';
 535                                 }
 536                                 /* shouldn't need this, but ... */
 537                                 if ( bv.bv_val[bv.bv_len-1] == '\r' ) {
 538                                         bv.bv_len--;
 539                                         bv.bv_val[bv.bv_len] = '\0';
 540                                 }
 541                                 ber_bvarray_add( &bdb->bi_db_config, &bv );
 542                         }
 543                         fclose( f );
 544                 } else {
 545                         /* Eh? It disappeared between config and open?? */
 546                         bdb->bi_flags &= ~BDB_HAS_CONFIG;
 547                 }
 548
 549         }
 550         bdb->bi_flags |= BDB_IS_OPEN;
 551
 552         return 0;
 553 }
 554
 555 static int
 556 bdb_db_close( BackendDB *be )
 557 {
 558         int rc;
 559         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 560         struct bdb_db_info *db;
 561         bdb_idl_cache_entry_t *entry, *next_entry;
 562
 563         bdb->bi_flags &= ~BDB_IS_OPEN;
 564
 565         ber_bvarray_free( bdb->bi_db_config );
 566
 567         while( bdb->bi_ndatabases-- ) {
 568                 db = bdb->bi_databases[bdb->bi_ndatabases];
 569                 rc = db->bdi_db->close( db->bdi_db, 0 );
 570                 /* Lower numbered names are not strdup'd */
 571                 if( bdb->bi_ndatabases >= BDB_NDB )
 572                         free( db->bdi_name );
 573                 free( db );
 574         }
 575         free( bdb->bi_databases );
 576         bdb_attr_index_destroy( bdb->bi_attrs );
 577
 578         bdb_cache_release_all (&bdb->bi_cache);
 579
 580         if ( bdb->bi_idl_cache_max_size ) {
 581                 ldap_pvt_thread_rdwr_wlock ( &bdb->bi_idl_tree_rwlock );
 582                 avl_free( bdb->bi_idl_tree, NULL );
 583                 entry = bdb->bi_idl_lru_head;
 584                 while ( entry != NULL ) {
 585                         next_entry = entry->idl_lru_next;
 586                         if ( entry->idl )
 587                                 free( entry->idl );
 588                         free( entry->kstr.bv_val );
 589                         free( entry );
 590                         entry = next_entry;
 591                 }
 592                 ldap_pvt_thread_rdwr_wunlock ( &bdb->bi_idl_tree_rwlock );
 593         }
 594
 595         if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_dbenv ) {
 596                 XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 597         }
 598
 599         return 0;
 600 }
 601
 602 static int
 603 bdb_db_destroy( BackendDB *be )
 604 {
 605         int rc;
 606         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 607
 608         /* close db environment */
 609         if( bdb->bi_dbenv ) {
 610                 /* force a checkpoint */
 611                 if ( !( slapMode & SLAP_TOOL_QUICK )) {
 612                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 613                         if( rc != 0 ) {
 614                                 Debug( LDAP_DEBUG_ANY,
 615                                         "bdb_db_destroy: txn_checkpoint failed: %s (%d)\n",
 616                                         db_strerror(rc), rc, 0 );
 617                         }
 618                 }
 619
 620                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 621                 bdb->bi_dbenv = NULL;
 622                 if( rc != 0 ) {
 623                         Debug( LDAP_DEBUG_ANY,
 624                                 "bdb_db_destroy: close failed: %s (%d)\n",
 625                                 db_strerror(rc), rc, 0 );
 626                         return rc;
 627                 }
 628         }
 629
 630         rc = alock_close( &bdb->bi_alock_info );
 631         if( rc != 0 ) {
 632                 Debug( LDAP_DEBUG_ANY,
 633                         "bdb_db_destroy: alock_close failed\n", 0, 0, 0 );
 634                 return -1;
 635         }
 636
 637         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 638         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 639
 640         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 641         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_mutex );
 642         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 643         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 644         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 645         if ( bdb->bi_idl_cache_max_size ) {
 646                 ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 647                 ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 648         }
 649
 650         ch_free( bdb );
 651         be->be_private = NULL;
 652
 653         return 0;
 654 }
 655
 656 int
 657 bdb_back_initialize(
 658         BackendInfo     *bi )
 659 {
 660         int rc;
 661
 662         static char *controls[] = {
 663                 LDAP_CONTROL_ASSERT,
 664                 LDAP_CONTROL_MANAGEDSAIT,
 665                 LDAP_CONTROL_NOOP,
 666                 LDAP_CONTROL_PAGEDRESULTS,
 667 #ifdef LDAP_CONTROL_SUBENTRIES
 668                 LDAP_CONTROL_SUBENTRIES,
 669 #endif
 670 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 671                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 672 #endif
 673                 NULL
 674         };
 675
 676         /* initialize the underlying database system */
 677         Debug( LDAP_DEBUG_TRACE,
 678                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 679                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 680
 681         bi->bi_flags |=
 682                 SLAP_BFLAG_INCREMENT |
 683 #ifdef BDB_SUBENTRIES
 684                 SLAP_BFLAG_SUBENTRIES |
 685 #endif
 686                 SLAP_BFLAG_ALIASES |
 687                 SLAP_BFLAG_REFERRALS;
 688
 689         bi->bi_controls = controls;
 690
 691         {       /* version check */
 692                 int major, minor, patch, ver;
 693                 char *version = db_version( &major, &minor, &patch );
 694 #ifdef HAVE_EBCDIC
 695                 char v2[1024];
 696
 697                 /* All our stdio does an ASCII to EBCDIC conversion on
 698                  * the output. Strings from the BDB library are already
 699                  * in EBCDIC; we have to go back and forth...
 700                  */
 701                 strcpy( v2, version );
 702                 __etoa( v2 );
 703                 version = v2;
 704 #endif
 705
 706                 ver = (major << 24) | (minor << 16) | patch;
 707                 if( ver != DB_VERSION_FULL ) {
 708                         /* fail if a versions don't match */
 709                         Debug( LDAP_DEBUG_ANY,
 710                                 LDAP_XSTRING(bdb_back_initialize) ": "
 711                                 "BDB library version mismatch:"
 712                                 " expected " DB_VERSION_STRING ","
 713                                 " got %s\n", version, 0, 0 );
 714                         return -1;
 715                 }
 716
 717                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 718                         ": %s\n", version, 0, 0 );
 719         }
 720
 721         db_env_set_func_free( ber_memfree );
 722         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 723         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 724 #ifndef NO_THREAD
 725         /* This is a no-op on a NO_THREAD build. Leave the default
 726          * alone so that BDB will sleep on interprocess conflicts.
 727          */
 728         db_env_set_func_yield( ldap_pvt_thread_yield );
 729 #endif
 730
 731         bi->bi_open = 0;
 732         bi->bi_close = 0;
 733         bi->bi_config = 0;
 734         bi->bi_destroy = 0;
 735
 736         bi->bi_db_init = bdb_db_init;
 737         bi->bi_db_config = config_generic_wrapper;
 738         bi->bi_db_open = bdb_db_open;
 739         bi->bi_db_close = bdb_db_close;
 740         bi->bi_db_destroy = bdb_db_destroy;
 741
 742         bi->bi_op_add = bdb_add;
 743         bi->bi_op_bind = bdb_bind;
 744         bi->bi_op_compare = bdb_compare;
 745         bi->bi_op_delete = bdb_delete;
 746         bi->bi_op_modify = bdb_modify;
 747         bi->bi_op_modrdn = bdb_modrdn;
 748         bi->bi_op_search = bdb_search;
 749
 750         bi->bi_op_unbind = 0;
 751
 752         bi->bi_extended = bdb_extended;
 753
 754         bi->bi_chk_referrals = bdb_referrals;
 755         bi->bi_operational = bdb_operational;
 756         bi->bi_has_subordinates = bdb_hasSubordinates;
 757         bi->bi_entry_release_rw = bdb_entry_release;
 758         bi->bi_entry_get_rw = bdb_entry_get;
 759
 760         /*
 761          * hooks for slap tools
 762          */
 763         bi->bi_tool_entry_open = bdb_tool_entry_open;
 764         bi->bi_tool_entry_close = bdb_tool_entry_close;
 765         bi->bi_tool_entry_first = bdb_tool_entry_next;
 766         bi->bi_tool_entry_next = bdb_tool_entry_next;
 767         bi->bi_tool_entry_get = bdb_tool_entry_get;
 768         bi->bi_tool_entry_put = bdb_tool_entry_put;
 769         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 770         bi->bi_tool_sync = 0;
 771         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 772         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 773         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 774
 775         bi->bi_connection_init = 0;
 776         bi->bi_connection_destroy = 0;
 777
 778         rc = bdb_back_init_cf( bi );
 779
 780         return rc;
 781 }
 782
 783 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 784         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 785
 786 /* conditionally define the init_module() function */
 787 #ifdef BDB_HIER
 788 SLAP_BACKEND_INIT_MODULE( hdb )
 789 #else /* !BDB_HIER */
 790 SLAP_BACKEND_INIT_MODULE( bdb )
 791 #endif /* !BDB_HIER */
 792
 793 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 794