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 static void *
  80 bdb_checkpoint( void *ctx, void *arg )
  81 {
  82         struct re_s *rtask = arg;
  83         struct bdb_info *bdb = rtask->arg;
  84
  85         TXN_CHECKPOINT( bdb->bi_dbenv, bdb->bi_txn_cp_kbyte,
  86                 bdb->bi_txn_cp_min, 0 );
  87         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
  88         ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
  89         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
  90         return NULL;
  91 }
  92
  93 /*
  94  * Unconditionally perform a database recovery. Only works on
  95  * databases that were previously opened with transactions and
  96  * logs enabled.
  97  */
  98 static int
  99 bdb_do_recovery( BackendDB *be )
 100 {
 101         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 102         DB_ENV  *re_dbenv;
 103         u_int32_t flags;
 104         int             rc;
 105         char    path[MAXPATHLEN], *ptr;
 106
 107         /* Create and init the recovery environment */
 108         rc = db_env_create( &re_dbenv, 0 );
 109         if( rc != 0 ) {
 110                 Debug( LDAP_DEBUG_ANY,
 111                         "bdb_do_recovery: db_env_create failed: %s (%d)\n",
 112                         db_strerror(rc), rc, 0 );
 113                 return rc;
 114         }
 115         re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
 116         re_dbenv->set_errcall( re_dbenv, bdb_errcall );
 117         (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_RECOVERY, 1);
 118         (void)re_dbenv->set_verbose(re_dbenv, DB_VERB_CHKPOINT, 1);
 119
 120         flags = DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |
 121                 DB_INIT_TXN | DB_USE_ENVIRON | DB_RECOVER;
 122
 123         /* Open the environment, which will also perform the recovery */
 124 #ifdef HAVE_EBCDIC
 125         strcpy( path, bdb->bi_dbenv_home );
 126         __atoe( path );
 127         rc = re_dbenv->open( re_dbenv,
 128                 path,
 129                 flags,
 130                 bdb->bi_dbenv_mode );
 131 #else
 132         rc = re_dbenv->open( re_dbenv,
 133                 bdb->bi_dbenv_home,
 134                 flags,
 135                 bdb->bi_dbenv_mode );
 136 #endif
 137         if( rc != 0 ) {
 138                 Debug( LDAP_DEBUG_ANY,
 139                         "bdb_do_recovery: dbenv_open failed: %s (%d)\n",
 140                         db_strerror(rc), rc, 0 );
 141                 return rc;
 142         }
 143         (void) re_dbenv->close( re_dbenv, 0 );
 144
 145         /* By convention we reset the mtime for id2entry.bdb to the current time */
 146         ptr = lutil_strcopy( path, bdb->bi_dbenv_home);
 147         *ptr++ = LDAP_DIRSEP[0];
 148         strcpy( ptr, bdbi_databases[0].file);
 149         (void) utime( path, NULL);
 150
 151         return 0;
 152 }
 153
 154 /*
 155  * Database recovery logic:
 156  * This function is called whenever the database appears to have been
 157  * shut down uncleanly, as determined by the alock functions.
 158  * Because of the -q function in slapadd, there is also the possibility
 159  * that the shutdown happened when transactions weren't being used and
 160  * the database is likely to be corrupt. The function checks for this
 161  * condition by examining the environment to make sure it had previously
 162  * been opened with transactions enabled. If this is the case, the
 163  * database is recovered as usual. If transactions were not enabled,
 164  * then this function will return a fail.
 165  */
 166 static int
 167 bdb_db_recover( BackendDB *be )
 168 {
 169         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 170         DB_ENV  *re_dbenv;
 171         u_int32_t flags;
 172         int             rc;
 173 #ifdef HAVE_EBCDIC
 174         char    path[MAXPATHLEN];
 175 #endif
 176
 177         /* Create the recovery environment, then open it.
 178          * We use the DB_JOIN in combination with a flags value of
 179          * zero so we join an existing environment and can read the
 180          * value of the flags that were used the last time the
 181          * environment was opened. DB_CREATE is added because the
 182          * open would fail if the only thing that had been done
 183          * was an open with transactions and logs disabled.
 184          */
 185         rc = db_env_create( &re_dbenv, 0 );
 186         if( rc != 0 ) {
 187                 Debug( LDAP_DEBUG_ANY,
 188                         "bdb_db_recover: db_env_create failed: %s (%d)\n",
 189                         db_strerror(rc), rc, 0 );
 190                 return rc;
 191         }
 192         re_dbenv->set_errpfx( re_dbenv, be->be_suffix[0].bv_val );
 193         re_dbenv->set_errcall( re_dbenv, bdb_errcall );
 194
 195         Debug( LDAP_DEBUG_TRACE,
 196                 "bdb_db_recover: dbenv_open(%s)\n",
 197                 bdb->bi_dbenv_home, 0, 0);
 198
 199 #ifdef HAVE_EBCDIC
 200         strcpy( path, bdb->bi_dbenv_home );
 201         __atoe( path );
 202         rc = re_dbenv->open( re_dbenv,
 203                 path,
 204                 DB_JOINENV,
 205                 bdb->bi_dbenv_mode );
 206 #else
 207         rc = re_dbenv->open( re_dbenv,
 208                 bdb->bi_dbenv_home,
 209                 DB_JOINENV,
 210                 bdb->bi_dbenv_mode );
 211 #endif
 212
 213         if( rc == ENOENT ) {
 214                 goto re_exit;
 215         }
 216         else if( rc != 0 ) {
 217                 Debug( LDAP_DEBUG_ANY,
 218                         "bdb_db_recover: dbenv_open failed: %s (%d)\n",
 219                         db_strerror(rc), rc, 0 );
 220                 return rc;
 221         }
 222
 223         /*
 224          * Check the flags that had been used in the previous open.
 225          * The environment needed to have had both
 226          * DB_INIT_LOG and DB_INIT_TXN set for us to be willing to
 227          * recover the database. Otherwise the an app failed while running
 228          * without transactions and logs enabled and the dn2id and id2entry
 229          * mapping is likely to be corrupt.
 230          */
 231         rc = re_dbenv->get_open_flags( re_dbenv, &flags );
 232         if( rc != 0 ) {
 233                 Debug( LDAP_DEBUG_ANY,
 234                         "bdb_db_recover: get_open_flags failed: %s (%d)\n",
 235                         db_strerror(rc), rc, 0 );
 236                 return rc;
 237         }
 238
 239         (void) re_dbenv->close( re_dbenv, 0 );
 240
 241         if( (flags & DB_INIT_LOG) && (flags & DB_INIT_TXN) ) {
 242                 return bdb_do_recovery( be );
 243         }
 244
 245 re_exit:
 246         Debug( LDAP_DEBUG_ANY,
 247                 "bdb_db_recover: Database cannot be recovered. "\
 248                 "Restore from backup!\n", 0, 0, 0);
 249         return -1;
 250
 251 }
 252
 253
 254 static int
 255 bdb_db_open( BackendDB *be )
 256 {
 257         int rc, i;
 258         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 259         struct stat stat1, stat2;
 260         u_int32_t flags;
 261         char path[MAXPATHLEN];
 262         char *ptr;
 263
 264         Debug( LDAP_DEBUG_ARGS,
 265                 "bdb_db_open: %s\n",
 266                 be->be_suffix[0].bv_val, 0, 0 );
 267
 268 #ifndef BDB_MULTIPLE_SUFFIXES
 269         if ( be->be_suffix[1].bv_val ) {
 270         Debug( LDAP_DEBUG_ANY,
 271                 "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
 272                 return -1;
 273         }
 274 #endif
 275
 276         /* Check existence of dbenv_home. Any error means trouble */
 277         rc = stat( bdb->bi_dbenv_home, &stat1 );
 278         if( rc !=0 ) {
 279                 Debug( LDAP_DEBUG_ANY,
 280                         "bdb_db_open: Cannot access database directory %s (%d)\n",
 281                         bdb->bi_dbenv_home, errno, 0 );
 282                         return -1;
 283         }
 284
 285         /* Perform database use arbitration/recovery logic */
 286         rc = alock_open( &bdb->bi_alock_info,
 287                                 "slapd",
 288                                 bdb->bi_dbenv_home,
 289                                 slapMode & SLAP_TOOL_READONLY ?
 290                                 ALOCK_LOCKED : ALOCK_UNIQUE );
 291
 292         if( rc == ALOCK_RECOVER ) {
 293                 Debug( LDAP_DEBUG_ANY,
 294                         "bdb_db_open: unclean shutdown detected;"
 295                         " attempting recovery.\n",
 296                         0, 0, 0 );
 297                 if( bdb_db_recover( be ) != 0 ) {
 298                         Debug( LDAP_DEBUG_ANY,
 299                                 "bdb_db_open: DB recovery failed.\n",
 300                                 0, 0, 0 );
 301                         return -1;
 302                 }
 303                 if( alock_recover (&bdb->bi_alock_info) != 0 ) {
 304                         Debug( LDAP_DEBUG_ANY,
 305                                 "bdb_db_open: alock_recover failed\n",
 306                                 0, 0, 0 );
 307                         return -1;
 308                 }
 309
 310         } else if( rc == ALOCK_BUSY ) {
 311                 Debug( LDAP_DEBUG_ANY,
 312                         "bdb_db_open: database already in use\n",
 313                         0, 0, 0 );
 314                 return -1;
 315         } else if( rc != ALOCK_CLEAN ) {
 316                 Debug( LDAP_DEBUG_ANY,
 317                         "bdb_db_open: alock package is unstable\n",
 318                         0, 0, 0 );
 319                 return -1;
 320         }
 321
 322         /*
 323          * The DB_CONFIG file may have changed. If so, recover the
 324          * database so that new settings are put into effect. Also
 325          * note the possible absence of DB_CONFIG in the log.
 326          */
 327         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 328                 ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 329                 *ptr++ = LDAP_DIRSEP[0];
 330                 strcpy( ptr, bdbi_databases[0].file);
 331                 if( stat( path, &stat2 ) == 0 ) {
 332                         if( stat2.st_mtime <= stat1.st_mtime ) {
 333                                 Debug( LDAP_DEBUG_ANY,
 334                                         "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
 335                                         "Performing database recovery to activate new settings.\n",
 336                                         be->be_suffix[0].bv_val, 0, 0 );
 337                                 if( bdb_do_recovery( be ) != 0) {
 338                                         Debug( LDAP_DEBUG_ANY,
 339                                                 "bdb_db_open: db recovery failed.\n",
 340                                                 0, 0, 0 );
 341                                         return -1;
 342                                 }
 343                         }
 344
 345                 }
 346         }
 347         else {
 348                 Debug( LDAP_DEBUG_ANY,
 349                         "bdb_db_open: Warning - No DB_CONFIG file found "
 350                         "in directory %s: (%d)\n"
 351                         "Expect poor performance for suffix %s.\n",
 352                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 353         }
 354
 355         flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 356         if ( !( slapMode & SLAP_TOOL_QUICK ))
 357                 flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN;
 358
 359         rc = db_env_create( &bdb->bi_dbenv, 0 );
 360         if( rc != 0 ) {
 361                 Debug( LDAP_DEBUG_ANY,
 362                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 363                         db_strerror(rc), rc, 0 );
 364                 return rc;
 365         }
 366
 367         /* If a key was set, use shared memory for the BDB environment */
 368         if ( bdb->bi_shm_key ) {
 369                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 370                 flags |= DB_SYSTEM_MEM;
 371         }
 372
 373         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 374         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 375         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 376
 377         /* One long-lived TXN per thread, two TXNs per write op */
 378         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 379
 380 #ifdef SLAP_ZONE_ALLOC
 381         if ( bdb->bi_cache.c_maxsize ) {
 382                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 383                                                                 SLAP_ZONE_INITSIZE,
 384                                                                 SLAP_ZONE_MAXSIZE,
 385                                                                 SLAP_ZONE_DELTA,
 386                                                                 SLAP_ZONE_SIZE);
 387         }
 388 #endif
 389
 390         if ( bdb->bi_idl_cache_max_size ) {
 391                 bdb->bi_idl_tree = NULL;
 392                 ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
 393                 ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
 394                 bdb->bi_idl_cache_size = 0;
 395         }
 396
 397         if( bdb->bi_dbenv_xflags != 0 ) {
 398                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 399                         bdb->bi_dbenv_xflags, 1);
 400                 if( rc != 0 ) {
 401                         Debug( LDAP_DEBUG_ANY,
 402                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 403                                 db_strerror(rc), rc, 0 );
 404                         return rc;
 405                 }
 406         }
 407
 408         Debug( LDAP_DEBUG_TRACE,
 409                 "bdb_db_open: dbenv_open(%s)\n",
 410                 bdb->bi_dbenv_home, 0, 0);
 411
 412 #ifdef HAVE_EBCDIC
 413         strcpy( path, bdb->bi_dbenv_home );
 414         __atoe( path );
 415         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 416                 path,
 417                 flags,
 418                 bdb->bi_dbenv_mode );
 419 #else
 420         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 421                 bdb->bi_dbenv_home,
 422                 flags,
 423                 bdb->bi_dbenv_mode );
 424 #endif
 425         if( rc != 0 ) {
 426                 Debug( LDAP_DEBUG_ANY,
 427                         "bdb_db_open: dbenv_open failed: %s (%d)\n",
 428                         db_strerror(rc), rc, 0 );
 429                 return rc;
 430         }
 431
 432         flags = DB_THREAD | bdb->bi_db_opflags;
 433
 434 #ifdef DB_AUTO_COMMIT
 435         if ( !( slapMode & SLAP_TOOL_QUICK ))
 436                 flags |= DB_AUTO_COMMIT;
 437 #endif
 438
 439         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 440                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 441
 442         /* open (and create) main database */
 443         for( i = 0; bdbi_databases[i].name; i++ ) {
 444                 struct bdb_db_info *db;
 445
 446                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 447
 448                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 449                 if( rc != 0 ) {
 450                         Debug( LDAP_DEBUG_ANY,
 451                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 452                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 453                         return rc;
 454                 }
 455
 456                 if( i == BDB_ID2ENTRY ) {
 457                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 458                                 BDB_ID2ENTRY_PAGESIZE );
 459                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 460                                 flags |= DB_RDONLY;
 461                         } else {
 462                                 flags |= DB_CREATE;
 463                         }
 464                 } else {
 465                         rc = db->bdi_db->set_flags( db->bdi_db,
 466                                 DB_DUP | DB_DUPSORT );
 467 #ifndef BDB_HIER
 468                         if ( slapMode & SLAP_TOOL_READONLY ) {
 469                                 flags |= DB_RDONLY;
 470                         } else {
 471                                 flags |= DB_CREATE;
 472                         }
 473 #else
 474                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 475                                 flags |= DB_RDONLY;
 476                         } else {
 477                                 flags |= DB_CREATE;
 478                         }
 479 #endif
 480                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 481                                 BDB_PAGESIZE );
 482                 }
 483
 484 #ifdef HAVE_EBCDIC
 485                 strcpy( path, bdbi_databases[i].file );
 486                 __atoe( path );
 487                 rc = DB_OPEN( db->bdi_db,
 488                         path,
 489                 /*      bdbi_databases[i].name, */ NULL,
 490                         bdbi_databases[i].type,
 491                         bdbi_databases[i].flags | flags,
 492                         bdb->bi_dbenv_mode );
 493 #else
 494                 rc = DB_OPEN( db->bdi_db,
 495                         bdbi_databases[i].file,
 496                 /*      bdbi_databases[i].name, */ NULL,
 497                         bdbi_databases[i].type,
 498                         bdbi_databases[i].flags | flags,
 499                         bdb->bi_dbenv_mode );
 500 #endif
 501
 502                 if ( rc != 0 ) {
 503                         char    buf[SLAP_TEXT_BUFLEN];
 504
 505                         snprintf( buf, sizeof(buf), "%s/%s",
 506                                 bdb->bi_dbenv_home, bdbi_databases[i].file );
 507                         Debug( LDAP_DEBUG_ANY,
 508                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 509                                 buf, db_strerror(rc), rc );
 510                         return rc;
 511                 }
 512
 513                 flags &= ~(DB_CREATE | DB_RDONLY);
 514                 db->bdi_name = bdbi_databases[i].name;
 515                 bdb->bi_databases[i] = db;
 516         }
 517
 518         bdb->bi_databases[i] = NULL;
 519         bdb->bi_ndatabases = i;
 520
 521         /* get nextid */
 522         rc = bdb_last_id( be, NULL );
 523         if( rc != 0 ) {
 524                 Debug( LDAP_DEBUG_ANY,
 525                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 526                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 527                 return rc;
 528         }
 529
 530         if ( !( slapMode & SLAP_TOOL_QUICK )) {
 531                 XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
 532         }
 533
 534         /* If we're in server mode and time-based checkpointing is enabled,
 535          * submit a task to perform periodic checkpoints.
 536          */
 537         if (( slapMode & SLAP_SERVER_MODE ) && bdb->bi_txn_cp &&
 538                 bdb->bi_txn_cp_min )  {
 539                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 540                 ldap_pvt_runqueue_insert( &slapd_rq, bdb->bi_txn_cp_min*60,
 541                         bdb_checkpoint, bdb );
 542                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 543         }
 544
 545         if ( slapMode & SLAP_SERVER_MODE && bdb->bi_db_has_config ) {
 546                 char    buf[SLAP_TEXT_BUFLEN];
 547                 FILE *f = fopen( bdb->bi_db_config_path, "r" );
 548                 struct berval bv;
 549
 550                 if ( f ) {
 551                         while ( fgets( buf, sizeof(buf), f )) {
 552                                 ber_str2bv( buf, 0, 1, &bv );
 553                                 if ( bv.bv_val[bv.bv_len-1] == '\n' ) {
 554                                         bv.bv_len--;
 555                                         bv.bv_val[bv.bv_len] = '\0';
 556                                 }
 557                                 /* shouldn't need this, but ... */
 558                                 if ( bv.bv_val[bv.bv_len-1] == '\r' ) {
 559                                         bv.bv_len--;
 560                                         bv.bv_val[bv.bv_len] = '\0';
 561                                 }
 562                                 ber_bvarray_add( &bdb->bi_db_config, &bv );
 563                         }
 564                         fclose( f );
 565                 } else {
 566                         /* Eh? It disappeared between config and open?? */
 567                         bdb->bi_db_has_config = 0;
 568                 }
 569
 570         }
 571         bdb->bi_db_is_open = 1;
 572
 573         return 0;
 574 }
 575
 576 static int
 577 bdb_db_close( BackendDB *be )
 578 {
 579         int rc;
 580         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 581         struct bdb_db_info *db;
 582         bdb_idl_cache_entry_t *entry, *next_entry;
 583
 584         bdb->bi_db_is_open = 0;
 585
 586         ber_bvarray_free( bdb->bi_db_config );
 587
 588         while( bdb->bi_ndatabases-- ) {
 589                 db = bdb->bi_databases[bdb->bi_ndatabases];
 590                 rc = db->bdi_db->close( db->bdi_db, 0 );
 591                 /* Lower numbered names are not strdup'd */
 592                 if( bdb->bi_ndatabases >= BDB_NDB )
 593                         free( db->bdi_name );
 594                 free( db );
 595         }
 596         free( bdb->bi_databases );
 597         bdb_attr_index_destroy( bdb->bi_attrs );
 598
 599         bdb_cache_release_all (&bdb->bi_cache);
 600
 601         if ( bdb->bi_idl_cache_max_size ) {
 602                 ldap_pvt_thread_rdwr_wlock ( &bdb->bi_idl_tree_rwlock );
 603                 avl_free( bdb->bi_idl_tree, NULL );
 604                 entry = bdb->bi_idl_lru_head;
 605                 while ( entry != NULL ) {
 606                         next_entry = entry->idl_lru_next;
 607                         if ( entry->idl )
 608                                 free( entry->idl );
 609                         free( entry->kstr.bv_val );
 610                         free( entry );
 611                         entry = next_entry;
 612                 }
 613                 ldap_pvt_thread_rdwr_wunlock ( &bdb->bi_idl_tree_rwlock );
 614         }
 615
 616         if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_dbenv ) {
 617                 XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
 618         }
 619
 620         return 0;
 621 }
 622
 623 static int
 624 bdb_db_destroy( BackendDB *be )
 625 {
 626         int rc;
 627         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 628
 629         /* close db environment */
 630         if( bdb->bi_dbenv ) {
 631                 /* force a checkpoint */
 632                 if ( !( slapMode & SLAP_TOOL_QUICK )) {
 633                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 634                         if( rc != 0 ) {
 635                                 Debug( LDAP_DEBUG_ANY,
 636                                         "bdb_db_destroy: txn_checkpoint failed: %s (%d)\n",
 637                                         db_strerror(rc), rc, 0 );
 638                         }
 639                 }
 640
 641                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 642                 bdb->bi_dbenv = NULL;
 643                 if( rc != 0 ) {
 644                         Debug( LDAP_DEBUG_ANY,
 645                                 "bdb_db_destroy: close failed: %s (%d)\n",
 646                                 db_strerror(rc), rc, 0 );
 647                         return rc;
 648                 }
 649         }
 650
 651         rc = alock_close( &bdb->bi_alock_info );
 652         if( rc != 0 ) {
 653                 Debug( LDAP_DEBUG_ANY,
 654                         "bdb_db_destroy: alock_close failed\n", 0, 0, 0 );
 655                 return -1;
 656         }
 657
 658         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 659         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 660
 661         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 662         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_mutex );
 663         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 664         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 665         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 666         if ( bdb->bi_idl_cache_max_size ) {
 667                 ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 668                 ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 669         }
 670
 671         ch_free( bdb );
 672         be->be_private = NULL;
 673
 674         return 0;
 675 }
 676
 677 int
 678 bdb_back_initialize(
 679         BackendInfo     *bi )
 680 {
 681         int rc;
 682
 683         static char *controls[] = {
 684                 LDAP_CONTROL_ASSERT,
 685                 LDAP_CONTROL_MANAGEDSAIT,
 686                 LDAP_CONTROL_NOOP,
 687                 LDAP_CONTROL_PAGEDRESULTS,
 688 #ifdef LDAP_CONTROL_SUBENTRIES
 689                 LDAP_CONTROL_SUBENTRIES,
 690 #endif
 691 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 692                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 693 #endif
 694                 NULL
 695         };
 696
 697         /* initialize the underlying database system */
 698         Debug( LDAP_DEBUG_TRACE,
 699                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 700                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 701
 702         bi->bi_flags |=
 703                 SLAP_BFLAG_INCREMENT |
 704 #ifdef BDB_SUBENTRIES
 705                 SLAP_BFLAG_SUBENTRIES |
 706 #endif
 707                 SLAP_BFLAG_ALIASES |
 708                 SLAP_BFLAG_REFERRALS;
 709
 710         bi->bi_controls = controls;
 711
 712         {       /* version check */
 713                 int major, minor, patch, ver;
 714                 char *version = db_version( &major, &minor, &patch );
 715 #ifdef HAVE_EBCDIC
 716                 char v2[1024];
 717
 718                 /* All our stdio does an ASCII to EBCDIC conversion on
 719                  * the output. Strings from the BDB library are already
 720                  * in EBCDIC; we have to go back and forth...
 721                  */
 722                 strcpy( v2, version );
 723                 __etoa( v2 );
 724                 version = v2;
 725 #endif
 726
 727                 ver = (major << 24) | (minor << 16) | patch;
 728                 if( ver != DB_VERSION_FULL ) {
 729                         /* fail if a versions don't match */
 730                         Debug( LDAP_DEBUG_ANY,
 731                                 LDAP_XSTRING(bdb_back_initialize) ": "
 732                                 "BDB library version mismatch:"
 733                                 " expected " DB_VERSION_STRING ","
 734                                 " got %s\n", version, 0, 0 );
 735                         return -1;
 736                 }
 737
 738                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 739                         ": %s\n", version, 0, 0 );
 740         }
 741
 742         db_env_set_func_free( ber_memfree );
 743         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 744         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 745 #ifndef NO_THREAD
 746         /* This is a no-op on a NO_THREAD build. Leave the default
 747          * alone so that BDB will sleep on interprocess conflicts.
 748          */
 749         db_env_set_func_yield( ldap_pvt_thread_yield );
 750 #endif
 751
 752         bi->bi_open = 0;
 753         bi->bi_close = 0;
 754         bi->bi_config = 0;
 755         bi->bi_destroy = 0;
 756
 757         bi->bi_db_init = bdb_db_init;
 758         bi->bi_db_config = config_generic_wrapper;
 759         bi->bi_db_open = bdb_db_open;
 760         bi->bi_db_close = bdb_db_close;
 761         bi->bi_db_destroy = bdb_db_destroy;
 762
 763         bi->bi_op_add = bdb_add;
 764         bi->bi_op_bind = bdb_bind;
 765         bi->bi_op_compare = bdb_compare;
 766         bi->bi_op_delete = bdb_delete;
 767         bi->bi_op_modify = bdb_modify;
 768         bi->bi_op_modrdn = bdb_modrdn;
 769         bi->bi_op_search = bdb_search;
 770
 771         bi->bi_op_unbind = 0;
 772
 773         bi->bi_extended = bdb_extended;
 774
 775         bi->bi_chk_referrals = bdb_referrals;
 776         bi->bi_operational = bdb_operational;
 777         bi->bi_has_subordinates = bdb_hasSubordinates;
 778         bi->bi_entry_release_rw = bdb_entry_release;
 779         bi->bi_entry_get_rw = bdb_entry_get;
 780
 781         /*
 782          * hooks for slap tools
 783          */
 784         bi->bi_tool_entry_open = bdb_tool_entry_open;
 785         bi->bi_tool_entry_close = bdb_tool_entry_close;
 786         bi->bi_tool_entry_first = bdb_tool_entry_next;
 787         bi->bi_tool_entry_next = bdb_tool_entry_next;
 788         bi->bi_tool_entry_get = bdb_tool_entry_get;
 789         bi->bi_tool_entry_put = bdb_tool_entry_put;
 790         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 791         bi->bi_tool_sync = 0;
 792         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 793         bi->bi_tool_id2entry_get = bdb_tool_id2entry_get;
 794         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 795
 796         bi->bi_connection_init = 0;
 797         bi->bi_connection_destroy = 0;
 798
 799         rc = bdb_back_init_cf( bi );
 800
 801         return rc;
 802 }
 803
 804 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 805         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 806
 807 /* conditionally define the init_module() function */
 808 #ifdef BDB_HIER
 809 SLAP_BACKEND_INIT_MODULE( hdb )
 810 #else /* !BDB_HIER */
 811 SLAP_BACKEND_INIT_MODULE( bdb )
 812 #endif /* !BDB_HIER */
 813
 814 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 815