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

   1 /* init.c - initialize bdb backend */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2000 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
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 static struct bdbi_database {
  17         char *file;
  18         char *name;
  19         int type;
  20         int flags;
  21 } bdbi_databases[] = {
  22         { "id2entry" BDB_SUFFIX, "id2entry", DB_BTREE, 0 },
  23         { "dn2id" BDB_SUFFIX, "dn2id", DB_BTREE, 0 },
  24         { NULL, NULL, 0, 0 }
  25 };
  26
  27 #if 0
  28 static int
  29 bdb_destroy( BackendInfo *bi )
  30 {
  31         return 0;
  32 }
  33
  34 static int
  35 bdb_open( BackendInfo *bi )
  36 {
  37         /* initialize the underlying database system */
  38         Debug( LDAP_DEBUG_TRACE, "bdb_open: initialize BDB backend\n",
  39                 0, 0, 0 );
  40
  41         return 0;
  42 }
  43
  44 static int
  45 bdb_close( BackendInfo *bi )
  46 {
  47         /* terminate the underlying database system */
  48         return 0;
  49 }
  50 #endif
  51
  52 static int
  53 bdb_db_init( BackendDB *be )
  54 {
  55         struct bdb_info *bdb;
  56
  57         Debug( LDAP_DEBUG_ANY,
  58                 "bdb_db_init: Initializing BDB database\n",
  59                 0, 0, 0 );
  60
  61         /* allocate backend-database-specific stuff */
  62         bdb = (struct bdb_info *) ch_calloc( 1, sizeof(struct bdb_info) );
  63
  64         /* DBEnv parameters */
  65         bdb->bi_dbenv_home = ch_strdup( BDB_DBENV_HOME );
  66         bdb->bi_dbenv_xflags = 0;
  67         bdb->bi_dbenv_mode = DEFAULT_MODE;
  68         bdb->bi_txn = 1;        /* default to using transactions */
  69
  70 #ifndef NO_THREADS
  71         bdb->bi_lock_detect = DB_LOCK_NORUN;
  72 #endif
  73
  74         ldap_pvt_thread_mutex_init( &bdb->bi_database_mutex );
  75         ldap_pvt_thread_mutex_init( &bdb->bi_lastid_mutex );
  76
  77         be->be_private = bdb;
  78         return 0;
  79 }
  80
  81 #ifndef NO_THREADS
  82 static void *lock_detect_task( void *arg )
  83 {
  84         struct bdb_info *bdb = (struct bdb_info *) arg;
  85
  86         while( bdb->bi_dbenv != NULL ) {
  87                 int rc;
  88                 sleep( bdb->bi_lock_detect_seconds );
  89
  90                 rc = LOCK_DETECT( bdb->bi_dbenv, 0,
  91                         bdb->bi_lock_detect, NULL );
  92
  93                 if( rc != 0 ) {
  94                         break;
  95                 }
  96         }
  97
  98         return NULL;
  99 }
 100 #endif
 101
 102 int
 103 bdb_bt_compare(
 104         DB *db,
 105         const DBT *usrkey,
 106         const DBT *curkey
 107 )
 108 {
 109         unsigned char *u, *c;
 110         int i;
 111
 112         u = usrkey->data;
 113         c = curkey->data;
 114
 115 #ifdef WORDS_BIGENDIAN
 116         for( i = 0; i < sizeof(ID); i++)
 117 #else
 118         for( i = sizeof(ID)-1; i >= 0; i--)
 119 #endif
 120         {
 121                 if( u[i] - c[i] )
 122                         return u[i] - c[i];
 123         }
 124         return 0;
 125 }
 126
 127 static int
 128 bdb_db_open( BackendDB *be )
 129 {
 130         int rc, i;
 131         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 132         u_int32_t flags;
 133
 134         Debug( LDAP_DEBUG_ARGS,
 135                 "bdb_db_open: %s\n",
 136                 be->be_suffix[0], 0, 0 );
 137
 138         /* we should check existance of dbenv_home and db_directory */
 139
 140         rc = db_env_create( &bdb->bi_dbenv, 0 );
 141         if( rc != 0 ) {
 142                 Debug( LDAP_DEBUG_ANY,
 143                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 144                         db_strerror(rc), rc, 0 );
 145                 return rc;
 146         }
 147
 148         flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 149
 150         if( bdb->bi_txn ) {
 151                 flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN | DB_RECOVER;
 152
 153         } else {
 154                 flags |= DB_INIT_CDB;
 155                 bdb->bi_txn_cp = 0;
 156         }
 157
 158         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0] );
 159         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 160
 161 #ifdef BDB_SUBDIRS
 162         {
 163                 char dir[MAXPATHLEN];
 164                 size_t len = strlen( bdb->bi_dbenv_home );
 165
 166                 strcpy( dir, bdb->bi_dbenv_home );
 167                 strcat( &dir[len], BDB_TMP_SUBDIR );
 168
 169                 rc = bdb->bi_dbenv->set_tmp_dir( bdb->bi_dbenv, dir );
 170                 if( rc != 0 ) {
 171                         Debug( LDAP_DEBUG_ANY,
 172                                 "bdb_db_open: set_tmp_dir(%s) failed: %s (%d)\n",
 173                                 dir, db_strerror(rc), rc );
 174                         return rc;
 175                 }
 176
 177                 strcat( &dir[len], BDB_LG_SUBDIR );
 178
 179                 rc = bdb->bi_dbenv->set_lg_dir( bdb->bi_dbenv, dir );
 180                 if( rc != 0 ) {
 181                         Debug( LDAP_DEBUG_ANY,
 182                                 "bdb_db_open: set_lg_dir(%s) failed: %s (%d)\n",
 183                                 dir, db_strerror(rc), rc );
 184                         return rc;
 185                 }
 186
 187                 strcat( &dir[len], BDB_DATA_SUBDIR );
 188
 189                 rc = bdb->bi_dbenv->set_data_dir( bdb->bi_dbenv, dir );
 190                 if( rc != 0 ) {
 191                         Debug( LDAP_DEBUG_ANY,
 192                                 "bdb_db_open: set_data_dir(%s) failed: %s (%d)\n",
 193                                 dir, db_strerror(rc), rc );
 194                         return rc;
 195                 }
 196         }
 197 #endif
 198
 199         Debug( LDAP_DEBUG_TRACE,
 200                 "bdb_db_open: dbenv_open(%s)\n",
 201                 bdb->bi_dbenv_home, 0, 0);
 202
 203         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 204                 bdb->bi_dbenv_home,
 205                 flags,
 206                 bdb->bi_dbenv_mode );
 207         if( rc != 0 ) {
 208                 Debug( LDAP_DEBUG_ANY,
 209                         "bdb_db_open: dbenv_open failed: %s (%d)\n",
 210                         db_strerror(rc), rc, 0 );
 211                 return rc;
 212         }
 213
 214         if( bdb->bi_dbenv_xflags != 0 ) {
 215                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 216                         bdb->bi_dbenv_xflags, 1);
 217                 if( rc != 0 ) {
 218                         Debug( LDAP_DEBUG_ANY,
 219                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 220                                 db_strerror(rc), rc, 0 );
 221                         return rc;
 222                 }
 223         }
 224
 225         flags = DB_THREAD | DB_CREATE | bdb->bi_db_opflags;
 226
 227         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 228                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 229
 230         /* open (and create) main database */
 231         for( i = 0; bdbi_databases[i].name; i++ ) {
 232                 struct bdb_db_info *db;
 233
 234                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 235
 236                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 237                 if( rc != 0 ) {
 238                         Debug( LDAP_DEBUG_ANY,
 239                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 240                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 241                         return rc;
 242                 }
 243
 244                 if( i == BDB_ID2ENTRY ) {
 245                         rc = db->bdi_db->set_bt_compare( db->bdi_db,
 246                                 bdb_bt_compare );
 247                 }
 248                 rc = db->bdi_db->set_pagesize( db->bdi_db, BDB_PAGESIZE );
 249
 250                 rc = db->bdi_db->open( db->bdi_db,
 251                         bdbi_databases[i].file,
 252                 /*      bdbi_databases[i].name, */ NULL,
 253                         bdbi_databases[i].type,
 254                         bdbi_databases[i].flags | flags,
 255                         bdb->bi_dbenv_mode );
 256
 257                 if( rc != 0 ) {
 258                         Debug( LDAP_DEBUG_ANY,
 259                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 260                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 261                         return rc;
 262                 }
 263
 264                 db->bdi_name = bdbi_databases[i].name;
 265                 bdb->bi_databases[i] = db;
 266         }
 267
 268         bdb->bi_databases[i] = NULL;
 269         bdb->bi_ndatabases = i;
 270
 271         /* get nextid */
 272         rc = bdb_last_id( be, NULL );
 273         if( rc != 0 ) {
 274                 Debug( LDAP_DEBUG_ANY,
 275                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 276                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 277                 return rc;
 278         }
 279
 280         /* <insert> open (and create) index databases */
 281
 282 #ifndef NO_THREADS
 283         if( bdb->bi_lock_detect != DB_LOCK_NORUN ) {
 284                 /* listener as a separate THREAD */
 285                 rc = ldap_pvt_thread_create( &bdb->bi_lock_detect_tid,
 286                         1, lock_detect_task, bdb );
 287         }
 288 #endif
 289         return 0;
 290 }
 291
 292 static int
 293 bdb_db_close( BackendDB *be )
 294 {
 295         int rc;
 296         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 297
 298         while( bdb->bi_ndatabases-- ) {
 299                 rc = bdb->bi_databases[bdb->bi_ndatabases]->bdi_db->close(
 300                         bdb->bi_databases[bdb->bi_ndatabases]->bdi_db, 0 );
 301         }
 302
 303         return 0;
 304 }
 305
 306 static int
 307 bdb_db_destroy( BackendDB *be )
 308 {
 309         int rc;
 310         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 311
 312         /* force a checkpoint */
 313         if( bdb->bi_txn ) {
 314                 rc = TXN_CHECKPOINT( bdb->bi_dbenv, 0, 0, DB_FORCE );
 315                 if( rc != 0 ) {
 316                         Debug( LDAP_DEBUG_ANY,
 317                                 "bdb_db_destroy: txn_checkpoint failed: %s (%d)\n",
 318                                 db_strerror(rc), rc, 0 );
 319                 }
 320         }
 321
 322         /* close db environment */
 323         if( bdb->bi_dbenv ) {
 324                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 325                 bdb->bi_dbenv = NULL;
 326                 if( rc != 0 ) {
 327                         Debug( LDAP_DEBUG_ANY,
 328                                 "bdb_db_destroy: close failed: %s (%d)\n",
 329                                 db_strerror(rc), rc, 0 );
 330                         return rc;
 331                 }
 332         }
 333
 334         return 0;
 335 }
 336
 337 #ifdef SLAPD_BDB_DYNAMIC
 338 int back_bdb_LTX_init_module( int argc, char *argv[] ) {
 339         BackendInfo bi;
 340
 341         memset( &bi, '\0', sizeof(bi) );
 342         bi.bi_type = "bdb";
 343         bi.bi_init = bdb_initialize;
 344
 345         backend_add( &bi );
 346         return 0;
 347 }
 348 #endif /* SLAPD_BDB_DYNAMIC */
 349
 350 int
 351 bdb_initialize(
 352         BackendInfo     *bi
 353 )
 354 {
 355         static char *controls[] = {
 356                 LDAP_CONTROL_MANAGEDSAIT,
 357                 NULL
 358         };
 359
 360         {       /* version check */
 361                 int major, minor, patch;
 362                 char *version = db_version( &major, &minor, &patch );
 363
 364                 if( major != DB_VERSION_MAJOR ||
 365                         minor != DB_VERSION_MINOR ||
 366                         patch < DB_VERSION_PATCH )
 367                 {
 368                         Debug( LDAP_DEBUG_ANY,
 369                                 "bi_back_initialize: version mismatch\n"
 370                                 "\texpected: " DB_VERSION_STRING "\n"
 371                                 "\tgot: %s \n", version, 0, 0 );
 372                 }
 373
 374                 Debug( LDAP_DEBUG_ANY, "bdb_initialize: %s\n",
 375                         version, 0, 0 );
 376         }
 377
 378 #if 0
 379         db_env_set_func_malloc( ch_malloc );
 380         db_env_set_func_realloc( ch_realloc );
 381         db_env_set_func_free( ch_free );
 382 #endif
 383
 384         db_env_set_func_yield( ldap_pvt_thread_yield );
 385
 386         bi->bi_controls = controls;
 387
 388         bi->bi_open = 0;
 389         bi->bi_close = 0;
 390         bi->bi_config = 0;
 391         bi->bi_destroy = 0;
 392
 393         bi->bi_db_init = bdb_db_init;
 394         bi->bi_db_config = bdb_db_config;
 395         bi->bi_db_open = bdb_db_open;
 396         bi->bi_db_close = bdb_db_close;
 397         bi->bi_db_destroy = bdb_db_destroy;
 398
 399         bi->bi_op_add = bdb_add;
 400         bi->bi_op_bind = bdb_bind;
 401         bi->bi_op_compare = bdb_compare;
 402         bi->bi_op_delete = bdb_delete;
 403         bi->bi_op_modify = bdb_modify;
 404         bi->bi_op_modrdn = bdb_modrdn;
 405         bi->bi_op_search = bdb_search;
 406
 407 #if 0
 408         bi->bi_op_unbind = bdb_unbind;
 409         bi->bi_op_abandon = bdb_abandon;
 410
 411         bi->bi_extended = bdb_extended;
 412 #endif
 413         bi->bi_acl_group = bdb_group;
 414         bi->bi_acl_attribute = bdb_attribute;
 415         bi->bi_chk_referrals = bdb_referrals;
 416
 417         bi->bi_entry_release_rw = bdb_entry_release;
 418
 419         /*
 420          * hooks for slap tools
 421          */
 422         bi->bi_tool_entry_open = bdb_tool_entry_open;
 423         bi->bi_tool_entry_close = bdb_tool_entry_close;
 424         bi->bi_tool_entry_first = bdb_tool_entry_next;
 425         bi->bi_tool_entry_next = bdb_tool_entry_next;
 426         bi->bi_tool_entry_get = bdb_tool_entry_get;
 427         bi->bi_tool_entry_put = bdb_tool_entry_put;
 428         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 429         bi->bi_tool_sync = 0;
 430
 431         bi->bi_connection_init = 0;
 432         bi->bi_connection_destroy = 0;
 433
 434         return 0;
 435 }