git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/init.c

   1 /* init.c - initialize bdb backend */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12 #include <ac/unistd.h>
  13 #include <ac/stdlib.h>
  14
  15 #include "back-bdb.h"
  16 #include "external.h"
  17
  18 static struct bdbi_database {
  19         char *file;
  20         char *name;
  21         int type;
  22         int flags;
  23 } bdbi_databases[] = {
  24         { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
  25 #ifdef BDB_HIER
  26         { "id2parent" BDB_SUFFIX, "id2parent", DB_BTREE, 0 },
  27 #else
  28         { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
  29 #endif
  30         { NULL, NULL, 0, 0 }
  31 };
  32
  33 #if 0
  34 static int
  35 bdb_destroy( BackendInfo *bi )
  36 {
  37         return 0;
  38 }
  39
  40 static int
  41 bdb_open( BackendInfo *bi )
  42 {
  43         /* initialize the underlying database system */
  44         Debug( LDAP_DEBUG_TRACE, "bdb_open: initialize BDB backend\n",
  45                 0, 0, 0 );
  46
  47         return 0;
  48 }
  49
  50 static int
  51 bdb_close( BackendInfo *bi )
  52 {
  53         /* terminate the underlying database system */
  54         return 0;
  55 }
  56 #endif
  57
  58 static int
  59 bdb_db_init( BackendDB *be )
  60 {
  61         struct bdb_info *bdb;
  62
  63         Debug( LDAP_DEBUG_ANY,
  64                 "bdb_db_init: Initializing BDB database\n",
  65                 0, 0, 0 );
  66
  67         /* indicate system schema supported */
  68         be->be_flags |= SLAP_BFLAG_ALIASES
  69                 | SLAP_BFLAG_REFERRALS
  70                 | SLAP_BFLAG_SUBENTRIES;
  71
  72         /* allocate backend-database-specific stuff */
  73         bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
  74
  75         /* DBEnv parameters */
  76         bdb->bi_dbenv_home = ch_strdup( BDB_DBENV_HOME );
  77         bdb->bi_dbenv_xflags = 0;
  78         bdb->bi_dbenv_mode = DEFAULT_MODE;
  79         bdb->bi_txn = 1;        /* default to using transactions */
  80
  81 #ifndef NO_THREADS
  82 #if 0
  83         bdb->bi_lock_detect = DB_LOCK_NORUN;
  84 #else
  85         bdb->bi_lock_detect = DB_LOCK_DEFAULT;
  86 #endif
  87 #endif
  88
  89         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  90         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  91 #ifdef BDB_HIER
  92         ldap_pvt_thread_rdwr_init( &bdb->bi_tree_rdwr );
  93 #endif
  94
  95         be->be_private = bdb;
  96         return 0;
  97 }
  98
  99 #if 0 /* ifndef NO_THREADS */
 100 static void *lock_detect_task( void *arg )
 101 {
 102         struct bdb_info *bdb = (struct bdb_info *) arg;
 103
 104         while( bdb->bi_dbenv != NULL ) {
 105                 int rc;
 106                 int aborted;
 107                 sleep( bdb->bi_lock_detect_seconds );
 108
 109                 rc = LOCK_DETECT( bdb->bi_dbenv, 0,
 110                         bdb->bi_lock_detect, &aborted );
 111
 112                 if( rc != 0 ) {
 113                         break;
 114                 }
 115
 116                 Debug( LDAP_DEBUG_ANY,
 117                         "bdb_lock_detect: aborted %d locks\n",
 118                         aborted, 0, 0 );
 119         }
 120
 121         return NULL;
 122 }
 123 #endif
 124
 125 int
 126 bdb_bt_compare(
 127         DB *db,
 128         const DBT *usrkey,
 129         const DBT *curkey
 130 )
 131 {
 132         unsigned char *u, *c;
 133         int i;
 134
 135         u = usrkey->data;
 136         c = curkey->data;
 137
 138 #ifdef WORDS_BIGENDIAN
 139         for( i = 0; i < sizeof(ID); i++)
 140 #else
 141         for( i = sizeof(ID)-1; i >= 0; i--)
 142 #endif
 143         {
 144                 if( u[i] - c[i] )
 145                         return u[i] - c[i];
 146         }
 147         return 0;
 148 }
 149
 150 static int
 151 bdb_db_open( BackendDB *be )
 152 {
 153         int rc, i;
 154         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 155         u_int32_t flags;
 156
 157         Debug( LDAP_DEBUG_ARGS,
 158                 "bdb_db_open: %s\n",
 159                 be->be_suffix[0]->bv_val, 0, 0 );
 160
 161         /* we should check existance of dbenv_home and db_directory */
 162
 163         rc = db_env_create( &bdb->bi_dbenv, 0 );
 164         if( rc != 0 ) {
 165                 Debug( LDAP_DEBUG_ANY,
 166                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 167                         db_strerror(rc), rc, 0 );
 168                 return rc;
 169         }
 170
 171         flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 172
 173         if( bdb->bi_txn ) {
 174                 flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN | DB_RECOVER;
 175
 176         } else {
 177                 flags |= DB_INIT_CDB;
 178                 bdb->bi_txn_cp = 0;
 179         }
 180
 181         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0]->bv_val );
 182         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 183 #ifndef NO_THREADS
 184         bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
 185 #endif
 186
 187 #ifdef BDB_SUBDIRS
 188         {
 189                 char dir[MAXPATHLEN];
 190                 size_t len = strlen( bdb->bi_dbenv_home );
 191
 192                 strcpy( dir, bdb->bi_dbenv_home );
 193                 strcat( &dir[len], BDB_TMP_SUBDIR );
 194
 195                 rc = bdb->bi_dbenv->set_tmp_dir( bdb->bi_dbenv, dir );
 196                 if( rc != 0 ) {
 197                         Debug( LDAP_DEBUG_ANY,
 198                                 "bdb_db_open: set_tmp_dir(%s) failed: %s (%d)\n",
 199                                 dir, db_strerror(rc), rc );
 200                         return rc;
 201                 }
 202
 203                 strcat( &dir[len], BDB_LG_SUBDIR );
 204
 205                 rc = bdb->bi_dbenv->set_lg_dir( bdb->bi_dbenv, dir );
 206                 if( rc != 0 ) {
 207                         Debug( LDAP_DEBUG_ANY,
 208                                 "bdb_db_open: set_lg_dir(%s) failed: %s (%d)\n",
 209                                 dir, db_strerror(rc), rc );
 210                         return rc;
 211                 }
 212
 213                 strcat( &dir[len], BDB_DATA_SUBDIR );
 214
 215                 rc = bdb->bi_dbenv->set_data_dir( bdb->bi_dbenv, dir );
 216                 if( rc != 0 ) {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "bdb_db_open: set_data_dir(%s) failed: %s (%d)\n",
 219                                 dir, db_strerror(rc), rc );
 220                         return rc;
 221                 }
 222         }
 223 #endif
 224
 225         Debug( LDAP_DEBUG_TRACE,
 226                 "bdb_db_open: dbenv_open(%s)\n",
 227                 bdb->bi_dbenv_home, 0, 0);
 228
 229         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 230                 bdb->bi_dbenv_home,
 231                 flags,
 232                 bdb->bi_dbenv_mode );
 233         if( rc != 0 ) {
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "bdb_db_open: dbenv_open failed: %s (%d)\n",
 236                         db_strerror(rc), rc, 0 );
 237                 return rc;
 238         }
 239
 240         if( bdb->bi_dbenv_xflags != 0 ) {
 241                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 242                         bdb->bi_dbenv_xflags, 1);
 243                 if( rc != 0 ) {
 244                         Debug( LDAP_DEBUG_ANY,
 245                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 246                                 db_strerror(rc), rc, 0 );
 247                         return rc;
 248                 }
 249         }
 250
 251         flags = DB_THREAD | DB_CREATE | bdb->bi_db_opflags;
 252
 253         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 254                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 255
 256         /* open (and create) main database */
 257         for( i = 0; bdbi_databases[i].name; i++ ) {
 258                 struct bdb_db_info *db;
 259
 260                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 261
 262                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 263                 if( rc != 0 ) {
 264                         Debug( LDAP_DEBUG_ANY,
 265                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 266                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 267                         return rc;
 268                 }
 269
 270                 if( i == BDB_ID2ENTRY ) {
 271                         rc = db->bdi_db->set_bt_compare( db->bdi_db,
 272                                 bdb_bt_compare );
 273                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 274                                 BDB_ID2ENTRY_PAGESIZE );
 275                 } else {
 276 #ifdef BDB_HIER
 277                         rc = db->bdi_db->set_bt_compare( db->bdi_db,
 278                                 bdb_bt_compare );
 279 #elif defined(BDB_IDL_MULTI)
 280                         rc = db->bdi_db->set_flags( db->bdi_db,
 281                                 DB_DUP | DB_DUPSORT );
 282                         rc = db->bdi_db->set_dup_compare( db->bdi_db,
 283                                 bdb_bt_compare );
 284 #endif
 285                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 286                                 BDB_PAGESIZE );
 287                 }
 288
 289                 rc = db->bdi_db->open( db->bdi_db,
 290                         bdbi_databases[i].file,
 291                 /*      bdbi_databases[i].name, */ NULL,
 292                         bdbi_databases[i].type,
 293                         bdbi_databases[i].flags | flags,
 294                         bdb->bi_dbenv_mode );
 295
 296                 if( rc != 0 ) {
 297                         Debug( LDAP_DEBUG_ANY,
 298                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 299                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 300                         return rc;
 301                 }
 302
 303                 db->bdi_name = bdbi_databases[i].name;
 304                 bdb->bi_databases[i] = db;
 305         }
 306
 307         bdb->bi_databases[i] = NULL;
 308         bdb->bi_ndatabases = i;
 309
 310         /* get nextid */
 311         rc = bdb_last_id( be, NULL );
 312         if( rc != 0 ) {
 313                 Debug( LDAP_DEBUG_ANY,
 314                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 315                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 316                 return rc;
 317         }
 318
 319         /* <insert> open (and create) index databases */
 320 #ifdef BDB_HIER
 321         rc = bdb_build_tree( be );
 322 #endif
 323
 324 #if 0 /* ifndef NO_THREADS */
 325         if( bdb->bi_lock_detect != DB_LOCK_NORUN ) {
 326                 /* listener as a separate THREAD */
 327                 rc = ldap_pvt_thread_create( &bdb->bi_lock_detect_tid,
 328                         1, lock_detect_task, bdb );
 329         }
 330 #endif
 331         return 0;
 332 }
 333
 334 static int
 335 bdb_db_close( BackendDB *be )
 336 {
 337         int rc;
 338         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 339         struct bdb_db_info *db;
 340
 341         while( bdb->bi_ndatabases-- ) {
 342                 db = bdb->bi_databases[bdb->bi_ndatabases];
 343                 rc = db->bdi_db->close( db->bdi_db, 0 );
 344                 /* Lower numbered names are not strdup'd */
 345                 if( bdb->bi_ndatabases >= BDB_NDB )
 346                         free( db->bdi_name );
 347                 free( db );
 348         }
 349         free( bdb->bi_databases );
 350         bdb_attr_index_destroy( bdb->bi_attrs );
 351
 352         return 0;
 353 }
 354
 355 static int
 356 bdb_db_destroy( BackendDB *be )
 357 {
 358         int rc;
 359         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 360
 361         /* close db environment */
 362         if( bdb->bi_dbenv ) {
 363                 /* force a checkpoint */
 364                 if( bdb->bi_txn ) {
 365                         rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 366                         if( rc != 0 ) {
 367                                 Debug( LDAP_DEBUG_ANY,
 368                                         "bdb_db_destroy: txn_checkpoint failed: %s (%d)\n",
 369                                         db_strerror(rc), rc, 0 );
 370                         }
 371                 }
 372
 373                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 374                 bdb->bi_dbenv = NULL;
 375                 if( rc != 0 ) {
 376                         Debug( LDAP_DEBUG_ANY,
 377                                 "bdb_db_destroy: close failed: %s (%d)\n",
 378                                 db_strerror(rc), rc, 0 );
 379                         return rc;
 380                 }
 381         }
 382
 383         return 0;
 384 }
 385
 386 #ifdef SLAPD_BDB_DYNAMIC
 387 int back_bdb_LTX_init_module( int argc, char *argv[] ) {
 388         BackendInfo bi;
 389
 390         memset( &bi, '\0', sizeof(bi) );
 391         bi.bi_type = "bdb";
 392         bi.bi_init = bdb_initialize;
 393
 394         backend_add( &bi );
 395         return 0;
 396 }
 397 #endif /* SLAPD_BDB_DYNAMIC */
 398
 399 int
 400 bdb_initialize(
 401         BackendInfo     *bi
 402 )
 403 {
 404         static char *controls[] = {
 405                 LDAP_CONTROL_MANAGEDSAIT,
 406                 LDAP_CONTROL_SUBENTRIES,
 407                 NULL
 408         };
 409
 410         {       /* version check */
 411                 int major, minor, patch;
 412                 char *version = db_version( &major, &minor, &patch );
 413
 414                 if( major != DB_VERSION_MAJOR ||
 415                         minor != DB_VERSION_MINOR ||
 416                         patch < DB_VERSION_PATCH )
 417                 {
 418                         Debug( LDAP_DEBUG_ANY,
 419                                 "bi_back_initialize: version mismatch\n"
 420                                 "\texpected: " DB_VERSION_STRING "\n"
 421                                 "\tgot: %s \n", version, 0, 0 );
 422                 }
 423
 424                 Debug( LDAP_DEBUG_ANY, "bdb_initialize: %s\n",
 425                         version, 0, 0 );
 426         }
 427
 428 #if 0
 429         db_env_set_func_malloc( ch_malloc );
 430         db_env_set_func_realloc( ch_realloc );
 431         db_env_set_func_free( ch_free );
 432 #endif
 433
 434         db_env_set_func_yield( ldap_pvt_thread_yield );
 435
 436         bi->bi_controls = controls;
 437
 438         bi->bi_open = 0;
 439         bi->bi_close = 0;
 440         bi->bi_config = 0;
 441         bi->bi_destroy = 0;
 442
 443         bi->bi_db_init = bdb_db_init;
 444         bi->bi_db_config = bdb_db_config;
 445         bi->bi_db_open = bdb_db_open;
 446         bi->bi_db_close = bdb_db_close;
 447         bi->bi_db_destroy = bdb_db_destroy;
 448
 449         bi->bi_op_add = bdb_add;
 450         bi->bi_op_bind = bdb_bind;
 451         bi->bi_op_compare = bdb_compare;
 452         bi->bi_op_delete = bdb_delete;
 453         bi->bi_op_modify = bdb_modify;
 454         bi->bi_op_modrdn = bdb_modrdn;
 455         bi->bi_op_search = bdb_search;
 456
 457         bi->bi_op_unbind = 0;
 458         bi->bi_op_abandon = 0;
 459
 460         bi->bi_extended = bdb_extended;
 461
 462 #if 0
 463         /*
 464          * these routines (and their callers) are not yet designed
 465          * to work with transaction.  Using them may cause deadlock.
 466          */
 467         bi->bi_acl_group = bdb_group;
 468         bi->bi_acl_attribute = bdb_attribute;
 469 #else
 470         bi->bi_acl_group = 0;
 471         bi->bi_acl_attribute = 0;
 472 #endif
 473
 474         bi->bi_chk_referrals = bdb_referrals;
 475         bi->bi_entry_release_rw = bdb_entry_release;
 476
 477         /*
 478          * hooks for slap tools
 479          */
 480         bi->bi_tool_entry_open = bdb_tool_entry_open;
 481         bi->bi_tool_entry_close = bdb_tool_entry_close;
 482         bi->bi_tool_entry_first = bdb_tool_entry_next;
 483         bi->bi_tool_entry_next = bdb_tool_entry_next;
 484         bi->bi_tool_entry_get = bdb_tool_entry_get;
 485         bi->bi_tool_entry_put = bdb_tool_entry_put;
 486         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 487         bi->bi_tool_sync = 0;
 488
 489         bi->bi_connection_init = 0;
 490         bi->bi_connection_destroy = 0;
 491
 492         return 0;
 493 }