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         DBT *usrkey,
 106         DBT *curkey
 107 )
 108 {
 109         ID usr, cur;
 110         memcpy(&usr, usrkey->data, sizeof(ID));
 111         memcpy(&cur, curkey->data, sizeof(ID));
 112         return usr - cur;
 113 }
 114
 115 static int
 116 bdb_db_open( BackendDB *be )
 117 {
 118         int rc, i;
 119         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 120         u_int32_t flags;
 121
 122         Debug( LDAP_DEBUG_ARGS,
 123                 "bdb_db_open: %s\n",
 124                 be->be_suffix[0], 0, 0 );
 125
 126         /* we should check existance of dbenv_home and db_directory */
 127
 128         rc = db_env_create( &bdb->bi_dbenv, 0 );
 129         if( rc != 0 ) {
 130                 Debug( LDAP_DEBUG_ANY,
 131                         "bdb_db_open: db_env_create failed: %s (%d)\n",
 132                         db_strerror(rc), rc, 0 );
 133                 return rc;
 134         }
 135
 136         flags = DB_INIT_MPOOL | DB_THREAD | DB_CREATE;
 137
 138         if( bdb->bi_txn ) {
 139                 flags |= DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN | DB_RECOVER;
 140
 141         } else {
 142                 flags |= DB_INIT_CDB;
 143                 bdb->bi_txn_cp = 0;
 144         }
 145
 146         bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0] );
 147         bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
 148
 149 #ifdef BDB_SUBDIRS
 150         {
 151                 char dir[MAXPATHLEN];
 152                 size_t len = strlen( bdb->bi_dbenv_home );
 153
 154                 strcpy( dir, bdb->bi_dbenv_home );
 155                 strcat( &dir[len], BDB_TMP_SUBDIR );
 156
 157                 rc = bdb->bi_dbenv->set_tmp_dir( bdb->bi_dbenv, dir );
 158                 if( rc != 0 ) {
 159                         Debug( LDAP_DEBUG_ANY,
 160                                 "bdb_db_open: set_tmp_dir(%s) failed: %s (%d)\n",
 161                                 dir, db_strerror(rc), rc );
 162                         return rc;
 163                 }
 164
 165                 strcat( &dir[len], BDB_LG_SUBDIR );
 166
 167                 rc = bdb->bi_dbenv->set_lg_dir( bdb->bi_dbenv, dir );
 168                 if( rc != 0 ) {
 169                         Debug( LDAP_DEBUG_ANY,
 170                                 "bdb_db_open: set_lg_dir(%s) failed: %s (%d)\n",
 171                                 dir, db_strerror(rc), rc );
 172                         return rc;
 173                 }
 174
 175                 strcat( &dir[len], BDB_DATA_SUBDIR );
 176
 177                 rc = bdb->bi_dbenv->set_data_dir( bdb->bi_dbenv, dir );
 178                 if( rc != 0 ) {
 179                         Debug( LDAP_DEBUG_ANY,
 180                                 "bdb_db_open: set_data_dir(%s) failed: %s (%d)\n",
 181                                 dir, db_strerror(rc), rc );
 182                         return rc;
 183                 }
 184         }
 185 #endif
 186
 187         Debug( LDAP_DEBUG_TRACE,
 188                 "bdb_db_open: dbenv_open(%s)\n",
 189                 bdb->bi_dbenv_home, 0, 0);
 190
 191         rc = bdb->bi_dbenv->open( bdb->bi_dbenv,
 192                 bdb->bi_dbenv_home,
 193                 flags,
 194                 bdb->bi_dbenv_mode );
 195         if( rc != 0 ) {
 196                 Debug( LDAP_DEBUG_ANY,
 197                         "bdb_db_open: dbenv_open failed: %s (%d)\n",
 198                         db_strerror(rc), rc, 0 );
 199                 return rc;
 200         }
 201
 202         if( bdb->bi_dbenv_xflags != 0 ) {
 203                 rc = bdb->bi_dbenv->set_flags( bdb->bi_dbenv,
 204                         bdb->bi_dbenv_xflags, 1);
 205                 if( rc != 0 ) {
 206                         Debug( LDAP_DEBUG_ANY,
 207                                 "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
 208                                 db_strerror(rc), rc, 0 );
 209                         return rc;
 210                 }
 211         }
 212
 213         flags = DB_THREAD | DB_CREATE | bdb->bi_db_opflags;
 214
 215         bdb->bi_databases = (struct bdb_db_info **) ch_malloc(
 216                 BDB_INDICES * sizeof(struct bdb_db_info *) );
 217
 218         /* open (and create) main database */
 219         for( i = 0; bdbi_databases[i].name; i++ ) {
 220                 struct bdb_db_info *db;
 221
 222                 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
 223
 224                 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
 225                 if( rc != 0 ) {
 226                         Debug( LDAP_DEBUG_ANY,
 227                                 "bdb_db_open: db_create(%s) failed: %s (%d)\n",
 228                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 229                         return rc;
 230                 }
 231
 232                 if( i == BDB_ID2ENTRY ) {
 233                         rc = db->bdi_db->set_bt_compare( db->bdi_db,
 234                                 bdb_bt_compare );
 235                         rc = db->bdi_db->set_pagesize( db->bdi_db,
 236                                 BDB_ID2ENTRY_PAGESIZE );
 237                 }
 238                 rc = db->bdi_db->open( db->bdi_db,
 239                         bdbi_databases[i].file,
 240                 /*      bdbi_databases[i].name, */ NULL,
 241                         bdbi_databases[i].type,
 242                         bdbi_databases[i].flags | flags,
 243                         bdb->bi_dbenv_mode );
 244
 245                 if( rc != 0 ) {
 246                         Debug( LDAP_DEBUG_ANY,
 247                                 "bdb_db_open: db_open(%s) failed: %s (%d)\n",
 248                                 bdb->bi_dbenv_home, db_strerror(rc), rc );
 249                         return rc;
 250                 }
 251
 252                 db->bdi_name = bdbi_databases[i].name;
 253                 bdb->bi_databases[i] = db;
 254         }
 255
 256         bdb->bi_databases[i] = NULL;
 257         bdb->bi_ndatabases = i;
 258
 259         /* get nextid */
 260         rc = bdb_last_id( be, NULL );
 261         if( rc != 0 ) {
 262                 Debug( LDAP_DEBUG_ANY,
 263                         "bdb_db_open: last_id(%s) failed: %s (%d)\n",
 264                         bdb->bi_dbenv_home, db_strerror(rc), rc );
 265                 return rc;
 266         }
 267
 268         /* <insert> open (and create) index databases */
 269
 270 #ifndef NO_THREADS
 271         if( bdb->bi_lock_detect != DB_LOCK_NORUN ) {
 272                 /* listener as a separate THREAD */
 273                 rc = ldap_pvt_thread_create( &bdb->bi_lock_detect_tid,
 274                         1, lock_detect_task, bdb );
 275         }
 276 #endif
 277         return 0;
 278 }
 279
 280 static int
 281 bdb_db_close( BackendDB *be )
 282 {
 283         int rc;
 284         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 285
 286         /* force a checkpoint */
 287         if( bdb->bi_txn ) {
 288                 rc = txn_checkpoint( bdb->bi_dbenv, 0, 0, DB_FORCE );
 289                 if( rc != 0 ) {
 290                         Debug( LDAP_DEBUG_ANY,
 291                                 "bdb_db_destroy: txn_checkpoint failed: %s (%d)\n",
 292                                 db_strerror(rc), rc, 0 );
 293                         return rc;
 294                 }
 295         }
 296
 297         while( bdb->bi_ndatabases-- ) {
 298                 rc = bdb->bi_databases[bdb->bi_ndatabases]->bdi_db->close(
 299                         bdb->bi_databases[bdb->bi_ndatabases]->bdi_db, 0 );
 300         }
 301
 302         return 0;
 303 }
 304
 305 static int
 306 bdb_db_destroy( BackendDB *be )
 307 {
 308         int rc;
 309         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 310
 311         /* close db environment */
 312         if( bdb->bi_dbenv ) {
 313                 rc = bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
 314                 bdb->bi_dbenv = NULL;
 315                 if( rc != 0 ) {
 316                         Debug( LDAP_DEBUG_ANY,
 317                                 "bdb_db_destroy: close failed: %s (%d)\n",
 318                                 db_strerror(rc), rc, 0 );
 319                         return rc;
 320                 }
 321         }
 322
 323         return 0;
 324 }
 325
 326 #ifdef SLAPD_BDB_DYNAMIC
 327 int back_bdb_LTX_init_module( int argc, char *argv[] ) {
 328         BackendInfo bi;
 329
 330         memset( &bi, '\0', sizeof(bi) );
 331         bi.bi_type = "bdb";
 332         bi.bi_init = bdb_initialize;
 333
 334         backend_add( &bi );
 335         return 0;
 336 }
 337 #endif /* SLAPD_BDB_DYNAMIC */
 338
 339 int
 340 bdb_initialize(
 341         BackendInfo     *bi
 342 )
 343 {
 344         static char *controls[] = {
 345                 LDAP_CONTROL_MANAGEDSAIT,
 346                 NULL
 347         };
 348
 349         {       /* version check */
 350                 int major, minor, patch;
 351                 char *version = db_version( &major, &minor, &patch );
 352
 353                 if( major != DB_VERSION_MAJOR ||
 354                         minor != DB_VERSION_MINOR ||
 355                         patch < DB_VERSION_PATCH )
 356                 {
 357                         Debug( LDAP_DEBUG_ANY,
 358                                 "bi_back_initialize: version mismatch\n"
 359                                 "\texpected: " DB_VERSION_STRING "\n"
 360                                 "\tgot: %s \n", version, 0, 0 );
 361                 }
 362
 363                 Debug( LDAP_DEBUG_ANY, "bdb_initialize: %s\n",
 364                         version, 0, 0 );
 365         }
 366
 367 #if 0
 368         db_env_set_func_malloc( ch_malloc );
 369         db_env_set_func_realloc( ch_realloc );
 370         db_env_set_func_free( ch_free );
 371 #endif
 372
 373         db_env_set_func_yield( ldap_pvt_thread_yield );
 374
 375         bi->bi_controls = controls;
 376
 377         bi->bi_open = 0;
 378         bi->bi_close = 0;
 379         bi->bi_config = 0;
 380         bi->bi_destroy = 0;
 381
 382         bi->bi_db_init = bdb_db_init;
 383         bi->bi_db_config = bdb_db_config;
 384         bi->bi_db_open = bdb_db_open;
 385         bi->bi_db_close = bdb_db_close;
 386         bi->bi_db_destroy = bdb_db_destroy;
 387
 388         bi->bi_op_add = bdb_add;
 389         bi->bi_op_bind = bdb_bind;
 390         bi->bi_op_compare = bdb_compare;
 391         bi->bi_op_delete = bdb_delete;
 392         bi->bi_op_modify = bdb_modify;
 393         bi->bi_op_modrdn = bdb_modrdn;
 394         bi->bi_op_search = bdb_search;
 395
 396 #if 0
 397         bi->bi_op_unbind = bdb_unbind;
 398         bi->bi_op_abandon = bdb_abandon;
 399
 400         bi->bi_extended = bdb_extended;
 401 #endif
 402         bi->bi_acl_group = bdb_group;
 403         bi->bi_acl_attribute = bdb_attribute;
 404         bi->bi_chk_referrals = bdb_referrals;
 405
 406         bi->bi_entry_release_rw = bdb_entry_release;
 407
 408         /*
 409          * hooks for slap tools
 410          */
 411         bi->bi_tool_entry_open = bdb_tool_entry_open;
 412         bi->bi_tool_entry_close = bdb_tool_entry_close;
 413         bi->bi_tool_entry_first = bdb_tool_entry_next;
 414         bi->bi_tool_entry_next = bdb_tool_entry_next;
 415         bi->bi_tool_entry_get = bdb_tool_entry_get;
 416         bi->bi_tool_entry_put = bdb_tool_entry_put;
 417         bi->bi_tool_entry_reindex = bdb_tool_entry_reindex;
 418         bi->bi_tool_sync = 0;
 419
 420         bi->bi_connection_init = 0;
 421         bi->bi_connection_destroy = 0;
 422
 423         return 0;
 424 }