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

   1 /* add.c - ldap BerkeleyDB back-end add routine */
   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
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 static char bdb_gid[DB_XIDDATASIZE];
  17
  18 int
  19 bdb_add(
  20         BackendDB       *be,
  21         Connection      *conn,
  22         Operation       *op,
  23         Entry   *e )
  24 {
  25         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  26         struct berval   pdn;
  27         Entry           *p = NULL;
  28         int                     rc;
  29         const char      *text;
  30         char textbuf[SLAP_TEXT_BUFLEN];
  31         size_t textlen = sizeof textbuf;
  32         AttributeDescription *children = slap_schema.si_ad_children;
  33         DB_TXN          *ltid = NULL;
  34         struct bdb_op_info opinfo;
  35 #ifdef BDB_SUBENTRIES
  36         int subentry;
  37 #endif
  38 #if 0
  39         u_int32_t       lockid;
  40         DB_LOCK         lock;
  41 #endif
  42
  43         Debug(LDAP_DEBUG_ARGS, "==> bdb_add: %s\n", e->e_dn, 0, 0);
  44
  45         /* check entry's schema */
  46         rc = entry_schema_check( be, e, NULL, &text, textbuf, textlen );
  47         if ( rc != LDAP_SUCCESS ) {
  48                 Debug( LDAP_DEBUG_TRACE,
  49                         "bdb_add: entry failed schema check: %s (%d)\n",
  50                         text, rc, 0 );
  51                 goto return_results;
  52         }
  53
  54 #ifdef BDB_SUBENTRIES
  55         subentry = is_entry_subentry( e );
  56 #endif
  57
  58         /*
  59          * acquire an ID outside of the operation transaction
  60          * to avoid serializing adds.
  61          */
  62         rc = bdb_next_id( be, NULL, &e->e_id );
  63         if( rc != 0 ) {
  64                 Debug( LDAP_DEBUG_TRACE,
  65                         "bdb_add: next_id failed (%d)\n",
  66                         rc, 0, 0 );
  67                 rc = LDAP_OTHER;
  68                 text = "internal error";
  69                 goto return_results;
  70         }
  71
  72         if( 0 ) {
  73 retry:  /* transaction retry */
  74                 rc = TXN_ABORT( ltid );
  75                 ltid = NULL;
  76                 op->o_private = NULL;
  77                 if( rc != 0 ) {
  78                         rc = LDAP_OTHER;
  79                         text = "internal error";
  80                         goto return_results;
  81                 }
  82                 ldap_pvt_thread_yield();
  83         }
  84
  85         /* begin transaction */
  86         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  87                 bdb->bi_db_opflags );
  88         text = NULL;
  89         if( rc != 0 ) {
  90                 Debug( LDAP_DEBUG_TRACE,
  91                         "bdb_add: txn_begin failed: %s (%d)\n",
  92                         db_strerror(rc), rc, 0 );
  93                 rc = LDAP_OTHER;
  94                 text = "internal error";
  95                 goto return_results;
  96         }
  97 #if 0
  98         lockid = TXN_ID( ltid );
  99 #endif
 100
 101         opinfo.boi_bdb = be;
 102         opinfo.boi_txn = ltid;
 103         opinfo.boi_err = 0;
 104         op->o_private = &opinfo;
 105
 106         /*
 107          * Get the parent dn and see if the corresponding entry exists.
 108          * If the parent does not exist, only allow the "root" user to
 109          * add the entry.
 110          */
 111         if ( be_issuffix( be, &e->e_nname ) ) {
 112                 pdn = slap_empty_bv;
 113         } else {
 114                 dnParent( &e->e_nname, &pdn );
 115         }
 116
 117         if( pdn.bv_len != 0 ) {
 118                 Entry *matched = NULL;
 119
 120 #if 0
 121                 if ( ltid ) {
 122                         DBT obj;
 123                         obj.data = pdn.bv_val-1;
 124                         obj.size = pdn.bv_len+1;
 125                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 126                                 DB_LOCK_WRITE, &lock);
 127                 }
 128 #endif
 129
 130                 /* get parent */
 131                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, &matched, 0 );
 132
 133                 switch( rc ) {
 134                 case 0:
 135                 case DB_NOTFOUND:
 136                         break;
 137                 case DB_LOCK_DEADLOCK:
 138                 case DB_LOCK_NOTGRANTED:
 139                         goto retry;
 140                 default:
 141                         rc = LDAP_OTHER;
 142                         text = "internal error";
 143                         goto return_results;
 144                 }
 145
 146                 if ( p == NULL ) {
 147                         char *matched_dn = NULL;
 148                         BerVarray refs;
 149
 150                         if ( matched != NULL ) {
 151                                 matched_dn = ch_strdup( matched->e_dn );
 152                                 refs = is_entry_referral( matched )
 153                                         ? get_entry_referrals( be, conn, op, matched )
 154                                         : NULL;
 155                                 bdb_cache_return_entry_r(&bdb->bi_cache, matched);
 156                                 matched = NULL;
 157
 158                         } else {
 159                                 refs = referral_rewrite( default_referral,
 160                                         NULL, &e->e_name, LDAP_SCOPE_DEFAULT );
 161                         }
 162
 163                         Debug( LDAP_DEBUG_TRACE, "bdb_add: parent does not exist\n",
 164                                 0, 0, 0 );
 165
 166                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 167                                 matched_dn, NULL, refs, NULL );
 168
 169                         ber_bvarray_free( refs );
 170                         ch_free( matched_dn );
 171
 172                         goto done;
 173                 }
 174
 175                 rc = access_allowed( be, conn, op, p,
 176                         children, NULL, ACL_WRITE );
 177
 178                 switch( opinfo.boi_err ) {
 179                 case DB_LOCK_DEADLOCK:
 180                 case DB_LOCK_NOTGRANTED:
 181                         /* free parent and reader lock */
 182                         bdb_cache_return_entry_r( &bdb->bi_cache, p );
 183                         p = NULL;
 184                         goto retry;
 185                 }
 186
 187                 if ( ! rc ) {
 188                         Debug( LDAP_DEBUG_TRACE, "bdb_add: no write access to parent\n",
 189                                 0, 0, 0 );
 190                         rc = LDAP_INSUFFICIENT_ACCESS;
 191                         text = "no write access to parent";
 192                         goto return_results;;
 193                 }
 194
 195 #ifdef BDB_SUBENTRIES
 196                 if ( is_entry_subentry( p ) ) {
 197                         /* parent is a subentry, don't allow add */
 198                         Debug( LDAP_DEBUG_TRACE, "bdb_add: parent is subentry\n",
 199                                 0, 0, 0 );
 200                         rc = LDAP_OBJECT_CLASS_VIOLATION;
 201                         text = "parent is a subentry";
 202                         goto return_results;;
 203                 }
 204 #endif
 205 #ifdef BDB_ALIASES
 206                 if ( is_entry_alias( p ) ) {
 207                         /* parent is an alias, don't allow add */
 208                         Debug( LDAP_DEBUG_TRACE, "bdb_add: parent is alias\n",
 209                                 0, 0, 0 );
 210                         rc = LDAP_ALIAS_PROBLEM;
 211                         text = "parent is an alias";
 212                         goto return_results;;
 213                 }
 214 #endif
 215
 216                 if ( is_entry_referral( p ) ) {
 217                         /* parent is a referral, don't allow add */
 218                         char *matched_dn = p->e_dn;
 219                         BerVarray refs = get_entry_referrals( be, conn, op, p );
 220
 221                         Debug( LDAP_DEBUG_TRACE, "bdb_add: parent is referral\n",
 222                                 0, 0, 0 );
 223
 224                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 225                                 matched_dn, NULL, refs, NULL );
 226
 227                         ber_bvarray_free( refs );
 228                         bdb_cache_return_entry_r( &bdb->bi_cache, p );
 229                         p = NULL;
 230                         goto done;
 231                 }
 232
 233 #ifdef BDB_SUBENTRIES
 234                 if ( subentry ) {
 235                         /* FIXME: */
 236                         /* parent must be an administrative point of the required kind */
 237                 }
 238 #endif
 239
 240                 /* free parent and reader lock */
 241                 bdb_cache_return_entry_r( &bdb->bi_cache, p );
 242                 p = NULL;
 243
 244         } else {
 245                 /*
 246                  * no parent!
 247                  *      must be adding entry at suffix or with parent ""
 248                  */
 249                 if ( !be_isroot( be, &op->o_ndn )) {
 250                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 251                                 || be_isupdate( be, &op->o_ndn ) ) {
 252                                 p = (Entry *)&slap_entry_root;
 253
 254                                 /* check parent for "children" acl */
 255                                 rc = access_allowed( be, conn, op, p,
 256                                         children, NULL, ACL_WRITE );
 257                                 p = NULL;
 258
 259                                 switch( opinfo.boi_err ) {
 260                                 case DB_LOCK_DEADLOCK:
 261                                 case DB_LOCK_NOTGRANTED:
 262                                         goto retry;
 263                                 }
 264
 265                                 if ( ! rc ) {
 266                                         Debug( LDAP_DEBUG_TRACE,
 267                                                 "bdb_add: no write access to parent\n",
 268                                                 0, 0, 0 );
 269                                         rc = LDAP_INSUFFICIENT_ACCESS;
 270                                         text = "no write access to parent";
 271                                         goto return_results;;
 272                                 }
 273
 274                         } else {
 275                                 Debug( LDAP_DEBUG_TRACE, "bdb_add: %s denied\n",
 276                                         pdn.bv_len == 0 ? "suffix" : "entry at root",
 277                                         0, 0 );
 278                                 rc = LDAP_INSUFFICIENT_ACCESS;
 279                                 goto return_results;
 280                         }
 281                 }
 282
 283 #ifdef BDB_SUBENTRIES
 284                 if( subentry ) {
 285                         Debug( LDAP_DEBUG_TRACE,
 286                                 "bdb_add: no parent, cannot add subentry\n",
 287                                 0, 0, 0 );
 288                         rc = LDAP_INSUFFICIENT_ACCESS;
 289                         text = "no parent, cannot add subentry";
 290                         goto return_results;;
 291                 }
 292 #endif
 293 #if 0
 294                 if ( ltid ) {
 295                         DBT obj;
 296                         obj.data = ",";
 297                         obj.size = 1;
 298                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 299                                 DB_LOCK_WRITE, &lock);
 300                 }
 301 #endif
 302         }
 303
 304         /* dn2id index */
 305         rc = bdb_dn2id_add( be, ltid, &pdn, e );
 306         if ( rc != 0 ) {
 307                 Debug( LDAP_DEBUG_TRACE, "bdb_add: dn2id_add failed: %s (%d)\n",
 308                         db_strerror(rc), rc, 0 );
 309
 310                 switch( rc ) {
 311                 case DB_LOCK_DEADLOCK:
 312                 case DB_LOCK_NOTGRANTED:
 313                         goto retry;
 314                 case DB_KEYEXIST:
 315                         rc = LDAP_ALREADY_EXISTS;
 316                         break;
 317                 default:
 318                         rc = LDAP_OTHER;
 319                 }
 320                 goto return_results;
 321         }
 322
 323         /* id2entry index */
 324         rc = bdb_id2entry_add( be, ltid, e );
 325         if ( rc != 0 ) {
 326                 Debug( LDAP_DEBUG_TRACE, "bdb_add: id2entry_add failed\n",
 327                         0, 0, 0 );
 328                 switch( rc ) {
 329                 case DB_LOCK_DEADLOCK:
 330                 case DB_LOCK_NOTGRANTED:
 331                         goto retry;
 332                 default:
 333                         rc = LDAP_OTHER;
 334                 }
 335                 text = "entry store failed";
 336                 goto return_results;
 337         }
 338
 339         /* attribute indexes */
 340         rc = bdb_index_entry_add( be, ltid, e, e->e_attrs );
 341         if ( rc != LDAP_SUCCESS ) {
 342                 Debug( LDAP_DEBUG_TRACE, "bdb_add: index_entry_add failed\n",
 343                         0, 0, 0 );
 344                 switch( rc ) {
 345                 case DB_LOCK_DEADLOCK:
 346                 case DB_LOCK_NOTGRANTED:
 347                         goto retry;
 348                 default:
 349                         rc = LDAP_OTHER;
 350                 }
 351                 text = "index generation failed";
 352                 goto return_results;
 353         }
 354
 355         if( op->o_noop ) {
 356                 if (( rc=TXN_ABORT( ltid )) != 0 ) {
 357                         text = "txn_abort (no-op) failed";
 358                 } else {
 359                         rc = LDAP_SUCCESS;
 360                 }
 361
 362         } else {
 363                 if (( rc=TXN_PREPARE( ltid, bdb_gid )) != 0 ) {
 364                         text = "txn_prepare failed";
 365
 366                 } else {
 367                         if ( bdb_cache_add_entry_rw(&bdb->bi_cache,
 368                                 e, CACHE_WRITE_LOCK) != 0 )
 369                         {
 370                                 if(( rc=TXN_ABORT( ltid )) != 0 ) {
 371                                         text = "cache add & txn_abort failed";
 372                                 } else {
 373                                         rc = LDAP_OTHER;
 374                                         text = "cache add failed";
 375                                 }
 376                         } else {
 377                                 if(( rc=TXN_COMMIT( ltid, 0 )) != 0 ) {
 378                                         text = "txn_commit failed";
 379                                 } else {
 380                                         rc = LDAP_SUCCESS;
 381                                 }
 382                         }
 383                 }
 384         }
 385
 386         ltid = NULL;
 387         op->o_private = NULL;
 388
 389         if (rc == LDAP_SUCCESS) {
 390                 Debug(LDAP_DEBUG_TRACE, "bdb_add: added%s id=%08lx dn=\"%s\"\n",
 391                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 392                 text = NULL;
 393                 bdb_cache_entry_commit( e );
 394         }
 395         else {
 396                 Debug( LDAP_DEBUG_TRACE, "bdb_add: %s : %s (%d)\n",
 397                         text, db_strerror(rc), rc );
 398                 rc = LDAP_OTHER;
 399         }
 400
 401 return_results:
 402         send_ldap_result( conn, op, rc,
 403                 NULL, text, NULL, NULL );
 404
 405         if( rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 406                 ldap_pvt_thread_yield();
 407                 TXN_CHECKPOINT( bdb->bi_dbenv,
 408                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 409         }
 410
 411 done:
 412
 413         if( ltid != NULL ) {
 414                 TXN_ABORT( ltid );
 415                 op->o_private = NULL;
 416         }
 417
 418         return rc;
 419 }