git.sur5r.net Git - openldap/blob - servers/slapd/back-ldbm/modrdn.c

   1 /* modrdn.c - ldbm backend modrdn routine */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2005 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 /* Portions Copyright 1999, Juan C. Gomez, All rights reserved.
  17  * This software is not subject to any license of Silicon Graphics
  18  * Inc. or Purdue University.
  19  *
  20  * Redistribution and use in source and binary forms are permitted
  21  * without restriction or fee of any kind as long as this notice
  22  * is preserved.
  23  */
  24
  25 #include "portable.h"
  26
  27 #include <stdio.h>
  28
  29 #include <ac/string.h>
  30 #include <ac/socket.h>
  31
  32 #include "slap.h"
  33 #include "back-ldbm.h"
  34 #include "proto-back-ldbm.h"
  35
  36 int
  37 ldbm_back_modrdn(
  38     Operation   *op,
  39     SlapReply   *rs )
  40 {
  41         AttributeDescription *children = slap_schema.si_ad_children;
  42         AttributeDescription *entry = slap_schema.si_ad_entry;
  43         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  44         struct berval   p_dn, p_ndn;
  45         struct berval   new_dn = BER_BVNULL, new_ndn = BER_BVNULL;
  46         struct berval   old_ndn = BER_BVNULL;
  47         Entry           *e, *p = NULL;
  48         Entry           *matched;
  49         /* LDAP v2 supporting correct attribute handling. */
  50         LDAPRDN         new_rdn = NULL;
  51         LDAPRDN         old_rdn = NULL;
  52         int             isroot = -1;
  53         int             rc_id = 0;
  54         ID              id = NOID;
  55         char            textbuf[SLAP_TEXT_BUFLEN];
  56         size_t          textlen = sizeof textbuf;
  57         /* Added to support newSuperior */
  58         Entry           *np = NULL;     /* newSuperior Entry */
  59         struct berval   *np_ndn = NULL; /* newSuperior ndn */
  60         struct berval   *new_parent_dn = NULL;  /* np_dn, p_dn, or NULL */
  61         /* Used to interface with ldbm_modify_internal() */
  62         Modifications   *mod = NULL;            /* Used to delete old/add new rdn */
  63         int             manageDSAit = get_manageDSAit( op );
  64
  65         Debug( LDAP_DEBUG_TRACE,
  66                 "==>ldbm_back_modrdn: dn: %s newSuperior=%s\n",
  67                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "NULL",
  68                 ( op->oq_modrdn.rs_newSup && op->oq_modrdn.rs_newSup->bv_len )
  69                         ? op->oq_modrdn.rs_newSup->bv_val : "NULL", 0 );
  70
  71         /* grab giant lock for writing */
  72         ldap_pvt_thread_rdwr_wlock(&li->li_giant_rwlock);
  73
  74         e = dn2entry_w( op->o_bd, &op->o_req_ndn, &matched );
  75
  76         /* get entry with writer lock */
  77         /* FIXME: dn2entry() should return non-glue entry */
  78         if (( e == NULL  ) || ( !manageDSAit && e && is_entry_glue( e ))) {
  79                 if ( matched != NULL ) {
  80                         rs->sr_matched = strdup( matched->e_dn );
  81                         rs->sr_ref = is_entry_referral( matched )
  82                                 ? get_entry_referrals( op, matched )
  83                                 : NULL;
  84                         cache_return_entry_r( &li->li_cache, matched );
  85                 } else {
  86                         rs->sr_ref = referral_rewrite( default_referral, NULL,
  87                                                 &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  88                 }
  89
  90                 ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
  91
  92                 rs->sr_err = LDAP_REFERRAL;
  93                 send_ldap_result( op, rs );
  94
  95                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  96                 free( (char *)rs->sr_matched );
  97                 rs->sr_ref = NULL;
  98                 rs->sr_matched = NULL;
  99                 return rs->sr_err;
 100         }
 101
 102         /* check entry for "entry" acl */
 103         if ( ! access_allowed( op, e, entry, NULL, ACL_WRITE, NULL ) )
 104         {
 105                 Debug( LDAP_DEBUG_TRACE,
 106                         "<=- ldbm_back_modrdn: no write access to entry\n", 0,
 107                         0, 0 );
 108
 109                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 110                         "no write access to entry" );
 111
 112                 goto return_results;
 113         }
 114
 115         if (!manageDSAit && is_entry_referral( e ) ) {
 116                 /* parent is a referral, don't allow add */
 117                 /* parent is an alias, don't allow add */
 118                 rs->sr_ref = get_entry_referrals( op, e );
 119
 120                 Debug( LDAP_DEBUG_TRACE, "entry %s is referral\n", e->e_dn,
 121                     0, 0 );
 122
 123                 rs->sr_err = LDAP_REFERRAL;
 124                 rs->sr_matched = e->e_name.bv_val;
 125                 send_ldap_result( op, rs );
 126
 127                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
 128                 rs->sr_ref = NULL;
 129                 rs->sr_matched = NULL;
 130                 goto return_results;
 131         }
 132
 133         if ( has_children( op->o_bd, e ) ) {
 134                 Debug( LDAP_DEBUG_TRACE, "entry %s has children\n", e->e_dn,
 135                     0, 0 );
 136
 137                 send_ldap_error( op, rs, LDAP_NOT_ALLOWED_ON_NONLEAF,
 138                     "subtree rename not supported" );
 139                 goto return_results;
 140         }
 141
 142         if ( be_issuffix( op->o_bd, &e->e_nname ) ) {
 143                 p_ndn = slap_empty_bv ;
 144         } else {
 145                 dnParent( &e->e_nname, &p_ndn );
 146         }
 147
 148         if ( p_ndn.bv_len != 0 ) {
 149                 /* Make sure parent entry exist and we can write its
 150                  * children.
 151                  */
 152
 153                 if( (p = dn2entry_w( op->o_bd, &p_ndn, NULL )) == NULL) {
 154                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
 155                                 0, 0, 0);
 156
 157                         send_ldap_error( op, rs, LDAP_OTHER,
 158                                 "parent entry does not exist" );
 159
 160                         goto return_results;
 161                 }
 162
 163                 /* check parent for "children" acl */
 164                 if ( ! access_allowed( op, p, children, NULL,
 165                                 op->oq_modrdn.rs_newSup != NULL ?
 166                                         ACL_WDEL : ACL_WRITE,
 167                                 NULL ) )
 168                 {
 169                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
 170                                 0, 0 );
 171
 172                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 173                                 NULL );
 174                         goto return_results;
 175                 }
 176
 177                 Debug( LDAP_DEBUG_TRACE,
 178                        "ldbm_back_modrdn: wr to children of entry %s OK\n",
 179                        p_ndn.bv_val, 0, 0 );
 180
 181                 if ( p_ndn.bv_val == slap_empty_bv.bv_val ) {
 182                         p_dn = slap_empty_bv;
 183                 } else {
 184                         dnParent( &e->e_name, &p_dn );
 185                 }
 186
 187                 Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: parent dn=%s\n",
 188                        p_dn.bv_val, 0, 0 );
 189
 190         } else {
 191                 /* no parent, must be root to modify rdn */
 192                 isroot = be_isroot( op );
 193                 if ( ! isroot ) {
 194                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 195                                 || be_shadow_update( op ) ) {
 196                                 int     can_access;
 197                                 p = (Entry *)&slap_entry_root;
 198
 199                                 can_access = access_allowed( op, p,
 200                                                 children, NULL,
 201                                                 op->oq_modrdn.rs_newSup ?
 202                                                         ACL_WDEL : ACL_WRITE,
 203                                                 NULL );
 204                                 p = NULL;
 205
 206                                 /* check parent for "children" acl */
 207                                 if ( ! can_access ) {
 208                                         Debug( LDAP_DEBUG_TRACE,
 209                                                 "<=- ldbm_back_modrdn: no "
 210                                                 "access to parent\n", 0, 0, 0 );
 211
 212                                         send_ldap_error( op, rs,
 213                                                 LDAP_INSUFFICIENT_ACCESS,
 214                                                 NULL );
 215                                         goto return_results;
 216                                 }
 217
 218                         } else {
 219                                 Debug( LDAP_DEBUG_TRACE,
 220                                         "<=- ldbm_back_modrdn: no parent & "
 221                                         "not root\n", 0, 0, 0);
 222
 223                                 send_ldap_error( op, rs,
 224                                         LDAP_INSUFFICIENT_ACCESS,
 225                                         NULL );
 226                                 goto return_results;
 227                         }
 228                 }
 229
 230                 Debug( LDAP_DEBUG_TRACE,
 231                        "ldbm_back_modrdn: no parent, locked root\n",
 232                        0, 0, 0 );
 233         }
 234
 235         new_parent_dn = &p_dn;  /* New Parent unless newSuperior given */
 236
 237         if ( op->oq_modrdn.rs_newSup != NULL ) {
 238                 Debug( LDAP_DEBUG_TRACE,
 239                         "ldbm_back_modrdn: new parent \"%s\" requested...\n",
 240                         op->oq_modrdn.rs_newSup->bv_val, 0, 0 );
 241
 242                 np_ndn = op->oq_modrdn.rs_nnewSup;
 243
 244                 /* newSuperior == oldParent? */
 245                 if ( dn_match( &p_ndn, np_ndn ) ) {
 246                         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: "
 247                                 "new parent\"%s\" seems to be the same as the "
 248                                 "old parent \"%s\"\n",
 249                                 op->oq_modrdn.rs_newSup->bv_val, p_dn.bv_val, 0 );
 250
 251                         op->oq_modrdn.rs_newSup = NULL; /* ignore newSuperior */
 252                 }
 253         }
 254
 255         if ( op->oq_modrdn.rs_newSup != NULL ) {
 256                 /* newSuperior == entry being moved?, if so ==> ERROR */
 257                 /* Get Entry with dn=newSuperior. Does newSuperior exist? */
 258
 259                 if ( op->oq_modrdn.rs_nnewSup->bv_len ) {
 260                         if( (np = dn2entry_w( op->o_bd, np_ndn, NULL )) == NULL) {
 261                                 Debug( LDAP_DEBUG_TRACE,
 262                                     "ldbm_back_modrdn: newSup(ndn=%s) not here!\n",
 263                                     np_ndn->bv_val, 0, 0);
 264
 265                                 send_ldap_error( op, rs, LDAP_OTHER,
 266                                         "newSuperior not found" );
 267                                 goto return_results;
 268                         }
 269
 270                         Debug( LDAP_DEBUG_TRACE,
 271                                 "ldbm_back_modrdn: wr to new parent OK np=%p, id=%ld\n",
 272                                 (void *) np, np->e_id, 0 );
 273
 274                         /* check newSuperior for "children" acl */
 275                         if ( !access_allowed( op, np, children, NULL,
 276                                               ACL_WADD, NULL ) )
 277                         {
 278                                 Debug( LDAP_DEBUG_TRACE,
 279                                        "ldbm_back_modrdn: no wr to newSup children\n",
 280                                        0, 0, 0 );
 281
 282                                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 283                                 goto return_results;
 284                         }
 285
 286                         if ( is_entry_alias( np ) ) {
 287                                 /* parent is an alias, don't allow add */
 288                                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 289
 290
 291                                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 292                                     "newSuperior is an alias" );
 293
 294                                 goto return_results;
 295                         }
 296
 297                         if ( is_entry_referral( np ) ) {
 298                                 /* parent is a referral, don't allow add */
 299                                 Debug( LDAP_DEBUG_TRACE, "entry (%s) is referral\n",
 300                                         np->e_dn, 0, 0 );
 301
 302                                 send_ldap_error( op, rs, LDAP_OTHER,
 303                                     "newSuperior is a referral" );
 304
 305                                 goto return_results;
 306                         }
 307
 308                 } else {
 309
 310                         /* no parent, must be root to modify newSuperior */
 311                         if ( isroot == -1 ) {
 312                                 isroot = be_isroot( op );
 313                         }
 314
 315                         if ( ! isroot ) {
 316                                 if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 317                                         || be_shadow_update( op ) ) {
 318                                         int     can_access;
 319                                         np = (Entry *)&slap_entry_root;
 320
 321                                         can_access = access_allowed( op, np,
 322                                                         children, NULL, ACL_WADD, NULL );
 323                                         np = NULL;
 324
 325                                         /* check parent for "children" acl */
 326                                         if ( ! can_access ) {
 327                                                 Debug( LDAP_DEBUG_TRACE,
 328                                                         "<=- ldbm_back_modrdn: no "
 329                                                         "access to new superior\n", 0, 0, 0 );
 330
 331                                                 send_ldap_error( op, rs,
 332                                                         LDAP_INSUFFICIENT_ACCESS,
 333                                                         NULL );
 334                                                 goto return_results;
 335                                         }
 336
 337                                 } else {
 338                                         Debug( LDAP_DEBUG_TRACE,
 339                                                 "<=- ldbm_back_modrdn: \"\" "
 340                                                 "not allowed as new superior\n",
 341                                                 0, 0, 0);
 342
 343                                         send_ldap_error( op, rs,
 344                                                 LDAP_INSUFFICIENT_ACCESS,
 345                                                 NULL );
 346                                         goto return_results;
 347                                 }
 348                         }
 349                 }
 350
 351                 Debug( LDAP_DEBUG_TRACE,
 352                     "ldbm_back_modrdn: wr to new parent's children OK\n",
 353                     0, 0, 0 );
 354
 355                 new_parent_dn = op->oq_modrdn.rs_newSup;
 356         }
 357
 358         /* Build target dn and make sure target entry doesn't exist already. */
 359         build_new_dn( &new_dn, new_parent_dn, &op->oq_modrdn.rs_newrdn, NULL );
 360         dnNormalize( 0, NULL, NULL, &new_dn, &new_ndn, NULL );
 361
 362         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: new ndn=%s\n",
 363             new_ndn.bv_val, 0, 0 );
 364
 365         /* check for abandon */
 366         if ( op->o_abandon ) {
 367                 rs->sr_err = SLAPD_ABANDON;
 368                 goto return_results;
 369         }
 370
 371         if ( ( rc_id = dn2id ( op->o_bd, &new_ndn, &id ) ) || id != NOID ) {
 372                 /* if (rc_id) something bad happened to ldbm cache */
 373                 rs->sr_err = rc_id ? LDAP_OTHER : LDAP_ALREADY_EXISTS;
 374                 send_ldap_result( op, rs );
 375                 goto return_results;
 376         }
 377
 378         Debug( LDAP_DEBUG_TRACE,
 379             "ldbm_back_modrdn: new ndn=%s does not exist\n",
 380             new_ndn.bv_val, 0, 0 );
 381
 382         /* Get attribute type and attribute value of our new rdn, we will
 383          * need to add that to our new entry
 384          */
 385         if ( ldap_bv2rdn( &op->oq_modrdn.rs_newrdn, &new_rdn, (char **)&rs->sr_text,
 386                 LDAP_DN_FORMAT_LDAP ) )
 387         {
 388                 Debug( LDAP_DEBUG_TRACE,
 389                         "ldbm_back_modrdn: can't figure out "
 390                         "type(s)/values(s) of newrdn\n",
 391                         0, 0, 0 );
 392                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX,
 393                                     "unknown type(s) used in RDN" );
 394                 goto return_results;
 395         }
 396
 397         Debug( LDAP_DEBUG_TRACE,
 398                 "ldbm_back_modrdn: new_rdn_type=\"%s\", "
 399                 "new_rdn_val=\"%s\"\n",
 400                 new_rdn[ 0 ]->la_attr.bv_val,
 401                 new_rdn[ 0 ]->la_value.bv_val, 0 );
 402
 403         if ( op->oq_modrdn.rs_deleteoldrdn ) {
 404                 if ( ldap_bv2rdn( &op->o_req_dn, &old_rdn, (char **)&rs->sr_text,
 405                         LDAP_DN_FORMAT_LDAP ) )
 406                 {
 407                         Debug( LDAP_DEBUG_TRACE,
 408                                 "ldbm_back_modrdn: can't figure out "
 409                                 "the old_rdn type(s)/value(s)\n",
 410                                 0, 0, 0 );
 411                         send_ldap_error( op, rs, LDAP_OTHER,
 412                                     "cannot parse RDN from old DN" );
 413                         goto return_results;
 414                 }
 415         }
 416
 417         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: DN_X500\n",
 418                0, 0, 0 );
 419
 420         if ( slap_modrdn2mods( op, rs, e, old_rdn, new_rdn, &mod ) != LDAP_SUCCESS ) {
 421                 send_ldap_result( op, rs );
 422                 goto return_results;
 423         }
 424
 425         /* check for abandon */
 426         if ( op->o_abandon ) {
 427                 rs->sr_err = SLAPD_ABANDON;
 428                 goto return_results;
 429         }
 430
 431         (void) cache_delete_entry( &li->li_cache, e );
 432
 433         free( e->e_dn );
 434         old_ndn = e->e_nname;
 435         e->e_name = new_dn;
 436         e->e_nname = new_ndn;
 437         new_dn.bv_val = NULL;
 438         new_ndn.bv_val = NULL;
 439
 440         /* NOTE: after this you must not free new_dn or new_ndn!
 441          * They are used by cache.
 442          */
 443
 444         /* modify memory copy of entry */
 445         rs->sr_err = ldbm_modify_internal( op, &mod[0], e,
 446                 &rs->sr_text, textbuf, textlen );
 447         switch ( rs->sr_err ) {
 448         case LDAP_SUCCESS:
 449                 break;
 450
 451         default:
 452                 send_ldap_result( op, rs );
 453                 /* FALLTHRU */
 454         case SLAPD_ABANDON:
 455                 goto return_results;
 456         }
 457
 458         /*
 459          * NOTE: the backend MUST delete then add the entry,
 460          *              otherwise indexing may get hosed
 461          * FIXME: if a new ID was used, the add could be done first.
 462          *              that would be safer.
 463          */
 464
 465         /* delete old one */
 466         if ( dn2id_delete( op->o_bd, &old_ndn, e->e_id ) != 0 ) {
 467                 send_ldap_error( op, rs, LDAP_OTHER,
 468                         "DN index delete fail" );
 469                 goto return_results;
 470         }
 471
 472         /* add new one */
 473         if ( dn2id_add( op->o_bd, &e->e_nname, e->e_id ) != 0 ) {
 474                 /* try to repair old entry - probably hopeless */
 475         if( dn2id_add( op->o_bd, &old_ndn, e->e_id) != 0 ) {
 476                         send_ldap_error( op, rs, LDAP_OTHER,
 477                                 "DN index add and repair failed" );
 478                 } else {
 479                         send_ldap_error( op, rs, LDAP_OTHER,
 480                                 "DN index add failed" );
 481                 }
 482                 goto return_results;
 483         }
 484
 485         /* id2entry index */
 486         if ( id2entry_add( op->o_bd, e ) != 0 ) {
 487                 /* Try to undo */
 488                 int rc;
 489                 rc = dn2id_delete( op->o_bd, &e->e_nname, e->e_id );
 490                 rc |= dn2id_add( op->o_bd, &old_ndn, e->e_id );
 491                 if( rc ) {
 492                         send_ldap_error( op, rs, LDAP_OTHER,
 493                                 "entry update and repair failed" );
 494                 } else {
 495                         send_ldap_error( op, rs, LDAP_OTHER,
 496                                 "entry update failed" );
 497                 }
 498                 goto return_results;
 499         }
 500
 501         (void) cache_update_entry( &li->li_cache, e );
 502
 503         rs->sr_err = LDAP_SUCCESS;
 504         rs->sr_text = NULL;
 505         send_ldap_result( op, rs );
 506         cache_entry_commit( e );
 507
 508 return_results:
 509         if( new_dn.bv_val != NULL ) free( new_dn.bv_val );
 510         if( new_ndn.bv_val != NULL ) free( new_ndn.bv_val );
 511         if( old_ndn.bv_val != NULL ) free( old_ndn.bv_val );
 512
 513         /* LDAP v2 supporting correct attribute handling. */
 514         if ( new_rdn != NULL ) {
 515                 ldap_rdnfree( new_rdn );
 516         }
 517         if ( old_rdn != NULL ) {
 518                 ldap_rdnfree( old_rdn );
 519         }
 520         if ( mod != NULL ) {
 521                 Modifications *tmp;
 522                 for (; mod; mod = tmp ) {
 523                         /* slap_modrdn2mods does things one way,
 524                          * slap_mods_opattrs does it differently
 525                          */
 526                         if ( mod->sml_op != SLAP_MOD_SOFTADD &&
 527                                 mod->sml_op != LDAP_MOD_DELETE ) break;
 528                         if ( mod->sml_nvalues ) free( mod->sml_nvalues[0].bv_val );
 529                         tmp = mod->sml_next;
 530                         free( mod );
 531                 }
 532                 slap_mods_free( mod, 1 );
 533         }
 534
 535         /* LDAP v3 Support */
 536         if( np != NULL ) {
 537                 /* free new parent and writer lock */
 538                 cache_return_entry_w( &li->li_cache, np );
 539         }
 540
 541         if( p != NULL ) {
 542                 /* free parent and writer lock */
 543                 cache_return_entry_w( &li->li_cache, p );
 544         }
 545
 546         /* free entry and writer lock */
 547         cache_return_entry_w( &li->li_cache, e );
 548         ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 549         rs->sr_text = NULL;
 550         return( rs->sr_err );
 551 }