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 2000-2015 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 #include "config.h"
  30
  31 static const struct bdbi_database {
  32         char *file;
  33         struct berval name;
  34         int type;
  35         int flags;
  36 } bdbi_databases[] = {
  37         { "id2entry" BDB_SUFFIX, BER_BVC("id2entry"), DB_BTREE, 0 },
  38         { "dn2id" BDB_SUFFIX, BER_BVC("dn2id"), DB_BTREE, 0 },
  39         { NULL, BER_BVNULL, 0, 0 }
  40 };
  41
  42 typedef void * db_malloc(size_t);
  43 typedef void * db_realloc(void *, size_t);
  44
  45 #define bdb_db_init     BDB_SYMBOL(db_init)
  46 #define bdb_db_open BDB_SYMBOL(db_open)
  47 #define bdb_db_close BDB_SYMBOL(db_close)
  48
  49 static int
  50 bdb_db_init( BackendDB *be, ConfigReply *cr )
  51 {
  52         struct bdb_info *bdb;
  53         int rc;
  54
  55         Debug( LDAP_DEBUG_TRACE,
  56                 LDAP_XSTRING(bdb_db_init) ": Initializing " BDB_UCTYPE " database\n",
  57                 0, 0, 0 );
  58
  59         /* allocate backend-database-specific stuff */
  60         bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
  61
  62         /* DBEnv parameters */
  63         bdb->bi_dbenv_home = ch_strdup( SLAPD_DEFAULT_DB_DIR );
  64         bdb->bi_dbenv_xflags = DB_TIME_NOTGRANTED;
  65         bdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
  66
  67         bdb->bi_cache.c_maxsize = DEFAULT_CACHE_SIZE;
  68         bdb->bi_cache.c_minfree = 1;
  69
  70         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  71         bdb->bi_search_stack_depth = DEFAULT_SEARCH_STACK_DEPTH;
  72         bdb->bi_search_stack = NULL;
  73
  74         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  75         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  76 #ifdef BDB_HIER
  77         ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
  78 #endif
  79         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_lru_mutex );
  80         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_count_mutex );
  81         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_eifree_mutex );
  82         ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
  83         ldap_pvt_thread_rdwr_init ( &bdb->bi_cache.c_rwlock );
  84         ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
  85         ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
  86
  87         be->be_private = bdb;
  88         be->be_cf_ocs = be->bd_info->bi_cf_ocs;
  89
  90 #ifndef BDB_MULTIPLE_SUFFIXES
  91         SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_ONE_SUFFIX;
  92 #endif
  93
  94         rc = bdb_monitor_db_init( be );
  95
  96         return rc;
  97 }
  98
  99 static int
 100 bdb_db_close( BackendDB *be, ConfigReply *cr );
 101
 102 static int
 103 bdb_db_open( BackendDB *be, ConfigReply *cr )
 104 {
 105         int rc, i;
 106         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 107         struct stat stat1, stat2;
 108         u_int32_t flags;
 109         char path[MAXPATHLEN];
 110         char *dbhome;
 111         Entry *e = NULL;
 112         int do_recover = 0, do_alock_recover = 0;
 113         int alockt, quick = 0;
 114         int do_retry = 1;
 115
 116         if ( be->be_suffix == NULL ) {
 117                 Debug( LDAP_DEBUG_ANY,
 118                         LDAP_XSTRING(bdb_db_open) ": need suffix.\n",
 119                         1, 0, 0 );
 120                 return -1;
 121         }
 122
 123         Debug( LDAP_DEBUG_ARGS,
 124                 LDAP_XSTRING(bdb_db_open) ": \"%s\"\n",
 125                 be->be_suffix[0].bv_val, 0, 0 );
 126
 127         /* Check existence of dbenv_home. Any error means trouble */
 128         rc = stat( bdb->bi_dbenv_home, &stat1 );
 129         if( rc != 0 ) {
 130                 Debug( LDAP_DEBUG_ANY,
 131                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 132                         "cannot access database directory \"%s\" (%d).\n",
 133                         be->be_suffix[0].bv_val, bdb->bi_dbenv_home, errno );
 134                 return -1;
 135         }
 136
 137         /* Perform database use arbitration/recovery logic */
 138         alockt = (slapMode & SLAP_TOOL_READONLY) ? ALOCK_LOCKED : ALOCK_UNIQUE;
 139         if ( slapMode & SLAP_TOOL_QUICK ) {
 140                 alockt |= ALOCK_NOSAVE;
 141                 quick = 1;
 142         }
 143
 144         rc = alock_open( &bdb->bi_alock_info,
 145                                 "slapd",
 146                                 bdb->bi_dbenv_home, alockt );
 147
 148         /* alockt is TRUE if the existing environment was created in Quick mode */
 149         alockt = (rc & ALOCK_NOSAVE) ? 1 : 0;
 150         rc &= ~ALOCK_NOSAVE;
 151
 152         if( rc == ALOCK_RECOVER ) {
 153                 Debug( LDAP_DEBUG_ANY,
 154                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 155                         "unclean shutdown detected; attempting recovery.\n",
 156                         be->be_suffix[0].bv_val, 0, 0 );
 157                 do_alock_recover = 1;
 158                 do_recover = DB_RECOVER;
 159         } else if( rc == ALOCK_BUSY ) {
 160                 Debug( LDAP_DEBUG_ANY,
 161                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 162                         "database already in use.\n",
 163                         be->be_suffix[0].bv_val, 0, 0 );
 164                 return -1;
 165         } else if( rc != ALOCK_CLEAN ) {
 166                 Debug( LDAP_DEBUG_ANY,
 167                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 168                         "alock package is unstable.\n",
 169                         be->be_suffix[0].bv_val, 0, 0 );
 170                 return -1;
 171         }
 172         if ( rc == ALOCK_CLEAN )
 173                 be->be_flags |= SLAP_DBFLAG_CLEAN;
 174
 175         /*
 176          * The DB_CONFIG file may have changed. If so, recover the
 177          * database so that new settings are put into effect. Also
 178          * note the possible absence of DB_CONFIG in the log.
 179          */
 180         if( stat( bdb->bi_db_config_path, &stat1 ) == 0 ) {
 181                 if ( !do_recover ) {
 182                         char *ptr = lutil_strcopy(path, bdb->bi_dbenv_home);
 183                         *ptr++ = LDAP_DIRSEP[0];
 184                         strcpy( ptr, "__db.001" );
 185                         if( stat( path, &stat2 ) == 0 ) {
 186                                 if( stat2.st_mtime < stat1.st_mtime ) {
 187                                         Debug( LDAP_DEBUG_ANY,
 188                                                 LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix \"%s\" has changed.\n",
 189                                                         be->be_suffix[0].bv_val, 0, 0 );
 190                                         if ( quick ) {
 191                                                 Debug( LDAP_DEBUG_ANY,
 192                                                         "Cannot use Quick mode; perform manual recovery first.\n",
 193                                                         0, 0, 0 );
 194                                                 slapMode ^= SLAP_TOOL_QUICK;
 195                                                 rc = -1;
 196                                                 goto fail;
 197                                         } else {
 198                                                 Debug( LDAP_DEBUG_ANY,
 199                                                         "Performing database recovery to activate new settings.\n",
 200                                                         0, 0, 0 );
 201                                         }
 202                                         do_recover = DB_RECOVER;
 203                                 }
 204                         }
 205                 }
 206         }
 207         else {
 208                 Debug( LDAP_DEBUG_ANY,
 209                         LDAP_XSTRING(bdb_db_open) ": warning - no DB_CONFIG file found "
 210                         "in directory %s: (%d).\n"
 211                         "Expect poor performance for suffix \"%s\".\n",
 212                         bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
 213         }
 214
 215         /* Always let slapcat run, regardless of environment state.
 216          * This can be used to cause a cache flush after an unclean
 217          * shutdown.
 218          */
 219         if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
 220                 Debug( LDAP_DEBUG_ANY,
 221                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 222                         "recovery skipped in read-only mode. "
 223                         "Run manual recovery if errors are encountered.\n",
 224                         be->be_suffix[0].bv_val, 0, 0 );
 225                 do_recover = 0;
 226                 do_alock_recover = 0;
 227                 quick = alockt;
 228         }
 229
 230         /* An existing environment in Quick mode has nothing to recover. */
 231         if ( alockt && do_recover ) {
 232                 Debug( LDAP_DEBUG_ANY,
 233                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 234                         "cannot recover, database must be reinitialized.\n",
 235                         be->be_suffix[0].bv_val, 0, 0 );
 236                 rc = -1;
 237                 goto fail;
 238         }
 239
 240         rc = db_env_create( &bdb->bi_dbenv, 0 );
 241         if( rc != 0 ) {
 242                 Debug( LDAP_DEBUG_ANY,
 243                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 244                         "db_env_create failed: %s (%d).\n",
 245                         be->be_suffix[0].bv_val, db_strerror(rc), rc );
 246                 goto fail;
 247         }
 248
 249 #ifdef HAVE_EBCDIC
 250         strcpy( path, bdb->bi_dbenv_home );
 251         __atoe( path );
 252         dbhome = path;
 253 #else
 254         dbhome = bdb->bi_dbenv_home;
 255 #endif
 256
 257         /* If existing environment is clean but doesn't support
 258          * currently requested modes, remove it.
 259          */
 260         if ( !do_recover && ( alockt ^ quick )) {
 261 shm_retry:
 262                 rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
 263                 if ( rc ) {
 264                         Debug( LDAP_DEBUG_ANY,
 265                                 LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 266                                 "dbenv remove failed: %s (%d).\n",
 267                                 be->be_suffix[0].bv_val, db_strerror(rc), rc );
 268                         bdb->bi_dbenv = NULL;
 269                         goto fail;
 270                 }
 271                 rc = db_env_create( &bdb->bi_dbenv, 0 );
 272                 if( rc != 0 ) {
 273                         Debug( LDAP_DEBUG_ANY,
 274                                 LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 275                                 "db_env_create failed: %s (%d).\n",
 276                                 be->be_suffix[0].bv_val, db_strerror(rc), rc );
 277                         goto fail;
 278                 }
 279         }
 280
 281         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 282         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 283
 284         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 285
 286         if ( !BER_BVISNULL( &bdb->bi_db_crypt_key )) {
 287                 rc = bdb->bi_dbenv->set_encrypt( bdb->bi_dbenv, bdb->bi_db_crypt_key.bv_val,
 288                         DB_ENCRYPT_AES );
 289                 if ( rc ) {
 290                         Debug( LDAP_DEBUG_ANY,
 291                                 LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 292                                 "dbenv set_encrypt failed: %s (%d).\n",
 293                                 be->be_suffix[0].bv_val, db_strerror(rc), rc );
 294                         goto fail;
 295                 }
 296         }
 297
 298         /* One long-lived TXN per thread, two TXNs per write op */
 299         bdb->bi_dbenv->set_tx_max( bdb->bi_dbenv, connection_pool_max * 3 );
 300
 301         if( bdb->bi_dbenv_xflags != 0 ) {
 302                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 303                         bdb->bi_dbenv_xflags, 1);
 304                 if( rc != 0 ) {
 305                         Debug( LDAP_DEBUG_ANY,
 306                                 LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 307                                 "dbenv_set_flags failed: %s (%d).\n",
 308                                 be->be_suffix[0].bv_val, db_strerror(rc), rc );
 309                         goto fail;
 310                 }
 311         }
 312
 313 #define BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 314
 315         Debug( LDAP_DEBUG_TRACE,
 316                 LDAP_XSTRING(bdb_db_open) ": database \"%s\": "
 317                 "dbenv_open(%s).\n",
 318                 be->be_suffix[0].bv_val, bdb->bi_dbenv_home, 0);
 319
 320         flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
 321
 322         if ( !quick )
 323                 flags |= BDB_TXN_FLAGS;
 324
 325         /* If a key was set, use shared memory for the BDB environment */
 326         if ( bdb->bi_shm_key ) {
 327                 bdb->bi_dbenv->set_shm_key( bdb->bi_dbenv, bdb->bi_shm_key );
 328                 flags |= DB_SYSTEM_MEM;
 329         }
 330         rc = (bdb->bi_dbenv->open)( bdb->bi_dbenv, dbhome,
 331                         flags | do_recover, bdb->bi_dbenv_mode );
 332
 333         if ( rc ) {
 334                 /* Regular open failed, probably a missing shm environment.
 335                  * Start over, do a recovery.
 336                  */
 337                 if ( !do_recover && bdb->bi_shm_key && do_retry ) {
 338                         bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 339                         rc = db_env_create( &bdb->bi_dbenv, 0 );
 340                         if( rc == 0 ) {
 341                                 Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
 342                                         ": database \"%s\": "
 343                                         "shared memory env open failed, assuming stale env.\n",
 344                                         be->be_suffix[0].bv_val, 0, 0 );
 345                                 do_retry = 0;
 346                                 goto shm_retry;
 347                         }
 348                 }
 349                 Debug( LDAP_DEBUG_ANY,
 350                         LDAP_XSTRING(bdb_db_open) ": database \"%s\" cannot be %s, err %d. "
 351                         "Restore from backup!\n",
 352                         be->be_suffix[0].bv_val, do_recover ? "recovered" : "opened", rc );
 353                 goto fail;
 354         }
 355
 356         if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
 357                 Debug( LDAP_DEBUG_ANY,
 358                         LDAP_XSTRING(bdb_db_open) ": database \"%s\": alock_recover failed\n",
 359                         be->be_suffix[0].bv_val, 0, 0 );
 360                 rc = -1;
 361                 goto fail;
 362         }
 363
 364 #ifdef SLAP_ZONE_ALLOC
 365         if ( bdb->bi_cache.c_maxsize ) {
 366                 bdb->bi_cache.c_zctx = slap_zn_mem_create(
 367                         SLAP_ZONE_INITSIZE, SLAP_ZONE_MAXSIZE,
 368                         SLAP_ZONE_DELTA, SLAP_ZONE_SIZE);
 369         }
 370 #endif
 371
 372         /* dncache defaults to 0 == unlimited
 373          * must be >= entrycache
 374          */
 375         if ( bdb->bi_cache.c_eimax && bdb->bi_cache.c_eimax < bdb->bi_cache.c_maxsize ) {
 376                 bdb->bi_cache.c_eimax = bdb->bi_cache.c_maxsize;
 377         }
 378
 379         if ( bdb->bi_idl_cache_max_size ) {
 380                 bdb->bi_idl_tree = NULL;
 381                 bdb->bi_idl_cache_size = 0;
 382         }
 383
 384         flags = DB_THREAD | bdb->bi_db_opflags;
 385
 386 #ifdef DB_AUTO_COMMIT
 387         if ( !quick )
 388                 flags |= DB_AUTO_COMMIT;
 389 #endif
 390
 391         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 392                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 393
 394         /* open (and create) main database */
 395         for( i = 0; bdbi_databases[i].name.bv_val; i++ ) {
 396                 struct bdb_db_info *db;
 397
 398                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 399
 400                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 401                 if( rc != 0 ) {
 402                         snprintf(cr->msg, sizeof(cr->msg),
 403                                 "database \"%s\": db_create(%s) failed: %s (%d).",
 404                                 be->be_suffix[0].bv_val,
 405                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 406                         Debug( LDAP_DEBUG_ANY,
 407                                 LDAP_XSTRING(bdb_db_open) ": %s\n",
 408                                 cr->msg, 0, 0 );
 409                         ch_free( db );
 410                         goto fail;
 411                 }
 412
 413                 if( !BER_BVISNULL( &bdb->bi_db_crypt_key )) {
 414                         rc = db->bdi_db->set_flags( db->bdi_db, DB_ENCRYPT );
 415                         if ( rc ) {
 416                                 snprintf(cr->msg, sizeof(cr->msg),
 417                                         "database \"%s\": db set_flags(DB_ENCRYPT)(%s) failed: %s (%d).",
 418                                         be->be_suffix[0].bv_val,
 419                                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 420                                 Debug( LDAP_DEBUG_ANY,
 421                                         LDAP_XSTRING(bdb_db_open) ": %s\n",
 422                                         cr->msg, 0, 0 );
 423                                 db->bdi_db->close( db->bdi_db, 0 );
 424                                 ch_free( db );
 425                                 goto fail;
 426                         }
 427                 }
 428
 429                 if( bdb->bi_flags & BDB_CHKSUM ) {
 430                         rc = db->bdi_db->set_flags( db->bdi_db, DB_CHKSUM );
 431                         if ( rc ) {
 432                                 snprintf(cr->msg, sizeof(cr->msg),
 433                                         "database \"%s\": db set_flags(DB_CHKSUM)(%s) failed: %s (%d).",
 434                                         be->be_suffix[0].bv_val,
 435                                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 436                                 Debug( LDAP_DEBUG_ANY,
 437                                         LDAP_XSTRING(bdb_db_open) ": %s\n",
 438                                         cr->msg, 0, 0 );
 439                                 db->bdi_db->close( db->bdi_db, 0 );
 440                                 ch_free( db );
 441                                 goto fail;
 442                         }
 443                 }
 444
 445                 rc = bdb_db_findsize( bdb, (struct berval *)&bdbi_databases[i].name );
 446
 447                 if( i == BDB_ID2ENTRY ) {
 448                         if ( !rc ) rc = BDB_ID2ENTRY_PAGESIZE;
 449                         rc = db->bdi_db->set_pagesize( db->bdi_db, rc );
 450
 451                         if ( slapMode & SLAP_TOOL_MODE )
 452                                 db->bdi_db->mpf->set_priority( db->bdi_db->mpf,
 453                                         DB_PRIORITY_VERY_LOW );
 454
 455                         if ( slapMode & SLAP_TOOL_READMAIN ) {
 456                                 flags |= DB_RDONLY;
 457                         } else {
 458                                 flags |= DB_CREATE;
 459                         }
 460                 } else {
 461                         /* Use FS default size if not configured */
 462                         if ( rc )
 463                                 rc = db->bdi_db->set_pagesize( db->bdi_db, rc );
 464
 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                         rc = db->bdi_db->set_dup_compare( db->bdi_db,
 475                                 bdb_dup_compare );
 476                         if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 477                                 flags |= DB_RDONLY;
 478                         } else {
 479                                 flags |= DB_CREATE;
 480                         }
 481 #endif
 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                         snprintf( cr->msg, sizeof(cr->msg), "database \"%s\": "
 504                                 "db_open(%s/%s) failed: %s (%d).",
 505                                 be->be_suffix[0].bv_val,
 506                                 bdb->bi_dbenv_home, bdbi_databases[i].file,
 507                                 db_strerror(rc), rc );
 508                         Debug( LDAP_DEBUG_ANY,
 509                                 LDAP_XSTRING(bdb_db_open) ": %s\n",
 510                                 cr->msg, 0, 0 );
 511                         db->bdi_db->close( db->bdi_db, 0 );
 512                         ch_free( db );
 513                         goto fail;
 514                 }
 515
 516                 flags &= ~(DB_CREATE | DB_RDONLY);
 517                 db->bdi_name = bdbi_databases[i].name;
 518                 bdb->bi_databases[i] = db;
 519         }
 520
 521         bdb->bi_databases[i] = NULL;
 522         bdb->bi_ndatabases = i;
 523
 524         /* get nextid */
 525         rc = bdb_last_id( be, NULL );
 526         if( rc != 0 ) {
 527                 snprintf( cr->msg, sizeof(cr->msg), "database \"%s\": "
 528                         "last_id(%s) failed: %s (%d).",
 529                         be->be_suffix[0].bv_val, bdb->bi_dbenv_home,
 530                         db_strerror(rc), rc );
 531                 Debug( LDAP_DEBUG_ANY,
 532                         LDAP_XSTRING(bdb_db_open) ": %s\n",
 533                         cr->msg, 0, 0 );
 534                 goto fail;
 535         }
 536
 537         if ( !quick ) {
 538                 int txflag = DB_READ_COMMITTED;
 539                 /* avoid deadlocks in server; tools should
 540                  * wait since they have no deadlock retry mechanism.
 541                  */
 542                 if ( slapMode & SLAP_SERVER_MODE )
 543                         txflag |= DB_TXN_NOWAIT;
 544                 TXN_BEGIN(bdb->bi_dbenv, NULL, &bdb->bi_cache.c_txn, txflag);
 545         }
 546
 547         entry_prealloc( bdb->bi_cache.c_maxsize );
 548         attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
 549
 550         /* setup for empty-DN contexts */
 551         if ( BER_BVISEMPTY( &be->be_nsuffix[0] )) {
 552                 rc = bdb_id2entry( be, NULL, 0, &e );
 553         }
 554         if ( !e ) {
 555                 struct berval gluebv = BER_BVC("glue");
 556                 Operation op = {0};
 557                 Opheader ohdr = {0};
 558                 e = entry_alloc();
 559                 e->e_id = 0;
 560                 ber_dupbv( &e->e_name, (struct berval *)&slap_empty_bv );
 561                 ber_dupbv( &e->e_nname, (struct berval *)&slap_empty_bv );
 562                 attr_merge_one( e, slap_schema.si_ad_objectClass,
 563                         &gluebv, NULL );
 564                 attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
 565                         &gluebv, NULL );
 566                 op.o_hdr = &ohdr;
 567                 op.o_bd = be;
 568                 op.ora_e = e;
 569                 op.o_dn = be->be_rootdn;
 570                 op.o_ndn = be->be_rootndn;
 571                 slap_add_opattrs( &op, NULL, NULL, 0, 0 );
 572         }
 573         e->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
 574         e->e_private = &bdb->bi_cache.c_dntree;
 575         bdb->bi_cache.c_dntree.bei_e = e;
 576
 577         /* monitor setup */
 578         rc = bdb_monitor_db_open( be );
 579         if ( rc != 0 ) {
 580                 goto fail;
 581         }
 582
 583         bdb->bi_flags |= BDB_IS_OPEN;
 584
 585         return 0;
 586
 587 fail:
 588         bdb_db_close( be, NULL );
 589         return rc;
 590 }
 591
 592 static int
 593 bdb_db_close( BackendDB *be, ConfigReply *cr )
 594 {
 595         int rc;
 596         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 597         struct bdb_db_info *db;
 598         bdb_idl_cache_entry_t *entry, *next_entry;
 599
 600         /* monitor handling */
 601         (void)bdb_monitor_db_close( be );
 602
 603         {
 604                 Entry *e = bdb->bi_cache.c_dntree.bei_e;
 605                 if ( e ) {
 606                         bdb->bi_cache.c_dntree.bei_e = NULL;
 607                         e->e_private = NULL;
 608                         bdb_entry_return( e );
 609                 }
 610         }
 611
 612         bdb->bi_flags &= ~BDB_IS_OPEN;
 613
 614         ber_bvarray_free( bdb->bi_db_config );
 615         bdb->bi_db_config = NULL;
 616
 617         if( bdb->bi_dbenv ) {
 618                 /* Free cache locker if we enabled locking.
 619                  * TXNs must all be closed before DBs...
 620                  */
 621                 if ( !( slapMode & SLAP_TOOL_QUICK ) && bdb->bi_cache.c_txn ) {
 622                         TXN_ABORT( bdb->bi_cache.c_txn );
 623                         bdb->bi_cache.c_txn = NULL;
 624                 }
 625                 bdb_reader_flush( bdb->bi_dbenv );
 626         }
 627
 628         while( bdb->bi_databases && bdb->bi_ndatabases-- ) {
 629                 db = bdb->bi_databases[bdb->bi_ndatabases];
 630                 rc = db->bdi_db->close( db->bdi_db, 0 );
 631                 /* Lower numbered names are not strdup'd */
 632                 if( bdb->bi_ndatabases >= BDB_NDB )
 633                         free( db->bdi_name.bv_val );
 634                 free( db );
 635         }
 636         free( bdb->bi_databases );
 637         bdb->bi_databases = NULL;
 638
 639         bdb_cache_release_all (&bdb->bi_cache);
 640
 641         if ( bdb->bi_idl_cache_size ) {
 642                 avl_free( bdb->bi_idl_tree, NULL );
 643                 bdb->bi_idl_tree = NULL;
 644                 entry = bdb->bi_idl_lru_head;
 645                 do {
 646                         next_entry = entry->idl_lru_next;
 647                         if ( entry->idl )
 648                                 free( entry->idl );
 649                         free( entry->kstr.bv_val );
 650                         free( entry );
 651                         entry = next_entry;
 652                 } while ( entry != bdb->bi_idl_lru_head );
 653                 bdb->bi_idl_lru_head = bdb->bi_idl_lru_tail = NULL;
 654         }
 655
 656         /* close db environment */
 657         if( bdb->bi_dbenv ) {
 658                 /* force a checkpoint, but not if we were ReadOnly,
 659                  * and not in Quick mode since there are no transactions there.
 660                  */
 661                 if ( !( slapMode & ( SLAP_TOOL_QUICK|SLAP_TOOL_READONLY ))) {
 662                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 663                         if( rc != 0 ) {
 664                                 Debug( LDAP_DEBUG_ANY,
 665                                         "bdb_db_close: database \"%s\": "
 666                                         "txn_checkpoint failed: %s (%d).\n",
 667                                         be->be_suffix[0].bv_val, db_strerror(rc), rc );
 668                         }
 669                 }
 670
 671                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 672                 bdb->bi_dbenv = NULL;
 673                 if( rc != 0 ) {
 674                         Debug( LDAP_DEBUG_ANY,
 675                                 "bdb_db_close: database \"%s\": "
 676                                 "close failed: %s (%d)\n",
 677                                 be->be_suffix[0].bv_val, db_strerror(rc), rc );
 678                         return rc;
 679                 }
 680         }
 681
 682         rc = alock_close( &bdb->bi_alock_info, slapMode & SLAP_TOOL_QUICK );
 683         if( rc != 0 ) {
 684                 Debug( LDAP_DEBUG_ANY,
 685                         "bdb_db_close: database \"%s\": alock_close failed\n",
 686                         be->be_suffix[0].bv_val, 0, 0 );
 687                 return -1;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int
 694 bdb_db_destroy( BackendDB *be, ConfigReply *cr )
 695 {
 696         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 697
 698         /* stop and remove checkpoint task */
 699         if ( bdb->bi_txn_cp_task ) {
 700                 struct re_s *re = bdb->bi_txn_cp_task;
 701                 bdb->bi_txn_cp_task = NULL;
 702                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 703                 if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ) )
 704                         ldap_pvt_runqueue_stoptask( &slapd_rq, re );
 705                 ldap_pvt_runqueue_remove( &slapd_rq, re );
 706                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 707         }
 708
 709         /* monitor handling */
 710         (void)bdb_monitor_db_destroy( be );
 711
 712         if( bdb->bi_dbenv_home ) ch_free( bdb->bi_dbenv_home );
 713         if( bdb->bi_db_config_path ) ch_free( bdb->bi_db_config_path );
 714
 715         bdb_attr_index_destroy( bdb );
 716
 717         ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
 718         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_lru_mutex );
 719         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_count_mutex );
 720         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_eifree_mutex );
 721         ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );
 722 #ifdef BDB_HIER
 723         ldap_pvt_thread_mutex_destroy( &bdb->bi_modrdns_mutex );
 724 #endif
 725         ldap_pvt_thread_mutex_destroy( &bdb->bi_lastid_mutex );
 726         ldap_pvt_thread_mutex_destroy( &bdb->bi_database_mutex );
 727         ldap_pvt_thread_rdwr_destroy( &bdb->bi_idl_tree_rwlock );
 728         ldap_pvt_thread_mutex_destroy( &bdb->bi_idl_tree_lrulock );
 729
 730         ch_free( bdb );
 731         be->be_private = NULL;
 732
 733         return 0;
 734 }
 735
 736 int
 737 bdb_back_initialize(
 738         BackendInfo     *bi )
 739 {
 740         int rc;
 741
 742         static char *controls[] = {
 743                 LDAP_CONTROL_ASSERT,
 744                 LDAP_CONTROL_MANAGEDSAIT,
 745                 LDAP_CONTROL_NOOP,
 746                 LDAP_CONTROL_PAGEDRESULTS,
 747                 LDAP_CONTROL_PRE_READ,
 748                 LDAP_CONTROL_POST_READ,
 749                 LDAP_CONTROL_SUBENTRIES,
 750                 LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 751 #ifdef LDAP_X_TXN
 752                 LDAP_CONTROL_X_TXN_SPEC,
 753 #endif
 754                 NULL
 755         };
 756
 757         /* initialize the underlying database system */
 758         Debug( LDAP_DEBUG_TRACE,
 759                 LDAP_XSTRING(bdb_back_initialize) ": initialize "
 760                 BDB_UCTYPE " backend\n", 0, 0, 0 );
 761
 762         bi->bi_flags |=
 763                 SLAP_BFLAG_INCREMENT |
 764                 SLAP_BFLAG_SUBENTRIES |
 765                 SLAP_BFLAG_ALIASES |
 766                 SLAP_BFLAG_REFERRALS;
 767
 768         bi->bi_controls = controls;
 769
 770         {       /* version check */
 771                 int major, minor, patch, ver;
 772                 char *version = db_version( &major, &minor, &patch );
 773 #ifdef HAVE_EBCDIC
 774                 char v2[1024];
 775
 776                 /* All our stdio does an ASCII to EBCDIC conversion on
 777                  * the output. Strings from the BDB library are already
 778                  * in EBCDIC; we have to go back and forth...
 779                  */
 780                 strcpy( v2, version );
 781                 __etoa( v2 );
 782                 version = v2;
 783 #endif
 784
 785                 ver = (major << 24) | (minor << 16) | patch;
 786                 if( ver != DB_VERSION_FULL ) {
 787                         /* fail if a versions don't match */
 788                         Debug( LDAP_DEBUG_ANY,
 789                                 LDAP_XSTRING(bdb_back_initialize) ": "
 790                                 "BDB library version mismatch:"
 791                                 " expected " DB_VERSION_STRING ","
 792                                 " got %s\n", version, 0, 0 );
 793                         return -1;
 794                 }
 795
 796                 Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_back_initialize)
 797                         ": %s\n", version, 0, 0 );
 798         }
 799
 800         db_env_set_func_free( ber_memfree );
 801         db_env_set_func_malloc( (db_malloc *)ber_memalloc );
 802         db_env_set_func_realloc( (db_realloc *)ber_memrealloc );
 803 #if !defined(NO_THREAD) && DB_VERSION_FULL <= 0x04070000
 804         /* This is a no-op on a NO_THREAD build. Leave the default
 805          * alone so that BDB will sleep on interprocess conflicts.
 806          * Don't bother on BDB 4.7...
 807          */
 808         db_env_set_func_yield( ldap_pvt_thread_yield );
 809 #endif
 810
 811         bi->bi_open = 0;
 812         bi->bi_close = 0;
 813         bi->bi_config = 0;
 814         bi->bi_destroy = 0;
 815
 816         bi->bi_db_init = bdb_db_init;
 817         bi->bi_db_config = config_generic_wrapper;
 818         bi->bi_db_open = bdb_db_open;
 819         bi->bi_db_close = bdb_db_close;
 820         bi->bi_db_destroy = bdb_db_destroy;
 821
 822         bi->bi_op_add = bdb_add;
 823         bi->bi_op_bind = bdb_bind;
 824         bi->bi_op_compare = bdb_compare;
 825         bi->bi_op_delete = bdb_delete;
 826         bi->bi_op_modify = bdb_modify;
 827         bi->bi_op_modrdn = bdb_modrdn;
 828         bi->bi_op_search = bdb_search;
 829
 830         bi->bi_op_unbind = 0;
 831
 832         bi->bi_extended = bdb_extended;
 833
 834         bi->bi_chk_referrals = bdb_referrals;
 835         bi->bi_operational = bdb_operational;
 836         bi->bi_has_subordinates = bdb_hasSubordinates;
 837         bi->bi_entry_release_rw = bdb_entry_release;
 838         bi->bi_entry_get_rw = bdb_entry_get;
 839
 840         /*
 841          * hooks for slap tools
 842          */
 843         bi->bi_tool_entry_open = bdb_tool_entry_open;
 844         bi->bi_tool_entry_close = bdb_tool_entry_close;
 845         bi->bi_tool_entry_first = backend_tool_entry_first;
 846         bi->bi_tool_entry_first_x = bdb_tool_entry_first_x;
 847         bi->bi_tool_entry_next = bdb_tool_entry_next;
 848         bi->bi_tool_entry_get = bdb_tool_entry_get;
 849         bi->bi_tool_entry_put = bdb_tool_entry_put;
 850         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 851         bi->bi_tool_sync = 0;
 852         bi->bi_tool_dn2id_get = bdb_tool_dn2id_get;
 853         bi->bi_tool_entry_modify = bdb_tool_entry_modify;
 854
 855         bi->bi_connection_init = 0;
 856         bi->bi_connection_destroy = 0;
 857
 858         rc = bdb_back_init_cf( bi );
 859
 860         return rc;
 861 }
 862
 863 #if     (SLAPD_BDB == SLAPD_MOD_DYNAMIC && !defined(BDB_HIER)) || \
 864         (SLAPD_HDB == SLAPD_MOD_DYNAMIC && defined(BDB_HIER))
 865
 866 /* conditionally define the init_module() function */
 867 #ifdef BDB_HIER
 868 SLAP_BACKEND_INIT_MODULE( hdb )
 869 #else /* !BDB_HIER */
 870 SLAP_BACKEND_INIT_MODULE( bdb )
 871 #endif /* !BDB_HIER */
 872
 873 #endif /* SLAPD_[BH]DB == SLAPD_MOD_DYNAMIC */
 874