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         const char      *text = NULL;
  56         char            textbuf[SLAP_TEXT_BUFLEN];
  57         size_t          textlen = sizeof textbuf;
  58         /* Added to support newSuperior */
  59         Entry           *np = NULL;     /* newSuperior Entry */
  60         struct berval   *np_ndn = NULL; /* newSuperior ndn */
  61         struct berval   *new_parent_dn = NULL;  /* np_dn, p_dn, or NULL */
  62         /* Used to interface with ldbm_modify_internal() */
  63         Modifications   *mod = NULL;            /* Used to delete old/add new rdn */
  64         int             manageDSAit = get_manageDSAit( op );
  65
  66         Debug( LDAP_DEBUG_TRACE,
  67                 "==>ldbm_back_modrdn: dn: %s newSuperior=%s\n",
  68                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "NULL",
  69                 ( op->oq_modrdn.rs_newSup && op->oq_modrdn.rs_newSup->bv_len )
  70                         ? op->oq_modrdn.rs_newSup->bv_val : "NULL", 0 );
  71
  72         /* grab giant lock for writing */
  73         ldap_pvt_thread_rdwr_wlock(&li->li_giant_rwlock);
  74
  75         e = dn2entry_w( op->o_bd, &op->o_req_ndn, &matched );
  76
  77         /* get entry with writer lock */
  78         /* FIXME: dn2entry() should return non-glue entry */
  79         if (( e == NULL  ) || ( !manageDSAit && e && is_entry_glue( e ))) {
  80                 BerVarray deref = NULL;
  81                 if ( matched != NULL ) {
  82                         rs->sr_matched = strdup( matched->e_dn );
  83                         rs->sr_ref = is_entry_referral( matched )
  84                                 ? get_entry_referrals( op, matched )
  85                                 : NULL;
  86                         cache_return_entry_r( &li->li_cache, matched );
  87                 } else {
  88                         if ( !LDAP_STAILQ_EMPTY( &op->o_bd->be_syncinfo )) {
  89                                 syncinfo_t *si;
  90                                 LDAP_STAILQ_FOREACH( si, &op->o_bd->be_syncinfo, si_next ) {
  91                                         struct berval tmpbv;
  92                                         ber_dupbv( &tmpbv, &si->si_provideruri_bv[0] );
  93                                         ber_bvarray_add( &deref, &tmpbv );
  94                                 }
  95                         } else {
  96                                 deref = default_referral;
  97                         }
  98                         rs->sr_ref = referral_rewrite( deref, NULL, &op->o_req_dn,
  99                                                 LDAP_SCOPE_DEFAULT );
 100                 }
 101
 102                 ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 103
 104                 rs->sr_err = LDAP_REFERRAL;
 105                 send_ldap_result( op, rs );
 106
 107                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
 108                 if ( deref != default_referral ) {
 109                         ber_bvarray_free( deref );
 110                 }
 111                 free( (char *)rs->sr_matched );
 112                 rs->sr_ref = NULL;
 113                 rs->sr_matched = NULL;
 114                 return rs->sr_err;
 115         }
 116
 117         /* check entry for "entry" acl */
 118         if ( ! access_allowed( op, e,
 119                 entry, NULL, ACL_WRITE, NULL ) )
 120         {
 121                 Debug( LDAP_DEBUG_TRACE,
 122                         "<=- ldbm_back_modrdn: no write access to entry\n", 0,
 123                         0, 0 );
 124
 125                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 126                         "no write access to entry" );
 127
 128                 goto return_results;
 129         }
 130
 131         if (!manageDSAit && is_entry_referral( e ) ) {
 132                 /* parent is a referral, don't allow add */
 133                 /* parent is an alias, don't allow add */
 134                 rs->sr_ref = get_entry_referrals( op, e );
 135
 136                 Debug( LDAP_DEBUG_TRACE, "entry %s is referral\n", e->e_dn,
 137                     0, 0 );
 138
 139                 rs->sr_err = LDAP_REFERRAL;
 140                 rs->sr_matched = e->e_name.bv_val;
 141                 send_ldap_result( op, rs );
 142
 143                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
 144                 rs->sr_ref = NULL;
 145                 rs->sr_matched = NULL;
 146                 goto return_results;
 147         }
 148
 149         if ( has_children( op->o_bd, e ) ) {
 150                 Debug( LDAP_DEBUG_TRACE, "entry %s has children\n", e->e_dn,
 151                     0, 0 );
 152
 153                 send_ldap_error( op, rs, LDAP_NOT_ALLOWED_ON_NONLEAF,
 154                     "subtree rename not supported" );
 155                 goto return_results;
 156         }
 157
 158         if ( be_issuffix( op->o_bd, &e->e_nname ) ) {
 159                 p_ndn = slap_empty_bv ;
 160         } else {
 161                 dnParent( &e->e_nname, &p_ndn );
 162         }
 163
 164         if ( p_ndn.bv_len != 0 ) {
 165                 /* Make sure parent entry exist and we can write its
 166                  * children.
 167                  */
 168
 169                 if( (p = dn2entry_w( op->o_bd, &p_ndn, NULL )) == NULL) {
 170                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
 171                                 0, 0, 0);
 172
 173                         send_ldap_error( op, rs, LDAP_OTHER,
 174                                 "parent entry does not exist" );
 175
 176                         goto return_results;
 177                 }
 178
 179                 /* check parent for "children" acl */
 180                 if ( ! access_allowed( op, p,
 181                         children, NULL, ACL_WRITE, NULL ) )
 182                 {
 183                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
 184                                 0, 0 );
 185
 186                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 187                                 NULL );
 188                         goto return_results;
 189                 }
 190
 191                 Debug( LDAP_DEBUG_TRACE,
 192                        "ldbm_back_modrdn: wr to children of entry %s OK\n",
 193                        p_ndn.bv_val, 0, 0 );
 194
 195                 if ( p_ndn.bv_val == slap_empty_bv.bv_val ) {
 196                         p_dn = slap_empty_bv;
 197                 } else {
 198                         dnParent( &e->e_name, &p_dn );
 199                 }
 200
 201                 Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: parent dn=%s\n",
 202                        p_dn.bv_val, 0, 0 );
 203
 204         } else {
 205                 /* no parent, must be root to modify rdn */
 206                 isroot = be_isroot( op );
 207                 if ( ! isroot ) {
 208                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 209                                 || be_shadow_update( op ) ) {
 210                                 int     can_access;
 211                                 p = (Entry *)&slap_entry_root;
 212
 213                                 can_access = access_allowed( op, p,
 214                                                 children, NULL, ACL_WRITE, NULL );
 215                                 p = NULL;
 216
 217                                 /* check parent for "children" acl */
 218                                 if ( ! can_access ) {
 219                                         Debug( LDAP_DEBUG_TRACE,
 220                                                 "<=- ldbm_back_modrdn: no "
 221                                                 "access to parent\n", 0, 0, 0 );
 222
 223                                         send_ldap_error( op, rs,
 224                                                 LDAP_INSUFFICIENT_ACCESS,
 225                                                 NULL );
 226                                         goto return_results;
 227                                 }
 228
 229                         } else {
 230                                 Debug( LDAP_DEBUG_TRACE,
 231                                         "<=- ldbm_back_modrdn: no parent & "
 232                                         "not root\n", 0, 0, 0);
 233
 234                                 send_ldap_error( op, rs,
 235                                         LDAP_INSUFFICIENT_ACCESS,
 236                                         NULL );
 237                                 goto return_results;
 238                         }
 239                 }
 240
 241                 Debug( LDAP_DEBUG_TRACE,
 242                        "ldbm_back_modrdn: no parent, locked root\n",
 243                        0, 0, 0 );
 244         }
 245
 246         new_parent_dn = &p_dn;  /* New Parent unless newSuperior given */
 247
 248         if ( op->oq_modrdn.rs_newSup != NULL ) {
 249                 Debug( LDAP_DEBUG_TRACE,
 250                         "ldbm_back_modrdn: new parent \"%s\" requested...\n",
 251                         op->oq_modrdn.rs_newSup->bv_val, 0, 0 );
 252
 253                 np_ndn = op->oq_modrdn.rs_nnewSup;
 254
 255                 /* newSuperior == oldParent? */
 256                 if ( dn_match( &p_ndn, np_ndn ) ) {
 257                         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: "
 258                                 "new parent\"%s\" seems to be the same as the "
 259                                 "old parent \"%s\"\n",
 260                                 op->oq_modrdn.rs_newSup->bv_val, p_dn.bv_val, 0 );
 261
 262                         op->oq_modrdn.rs_newSup = NULL; /* ignore newSuperior */
 263                 }
 264         }
 265
 266         if ( op->oq_modrdn.rs_newSup != NULL ) {
 267                 /* newSuperior == entry being moved?, if so ==> ERROR */
 268                 /* Get Entry with dn=newSuperior. Does newSuperior exist? */
 269
 270                 if ( op->oq_modrdn.rs_nnewSup->bv_len ) {
 271                         if( (np = dn2entry_w( op->o_bd, np_ndn, NULL )) == NULL) {
 272                                 Debug( LDAP_DEBUG_TRACE,
 273                                     "ldbm_back_modrdn: newSup(ndn=%s) not here!\n",
 274                                     np_ndn->bv_val, 0, 0);
 275
 276                                 send_ldap_error( op, rs, LDAP_OTHER,
 277                                         "newSuperior not found" );
 278                                 goto return_results;
 279                         }
 280
 281                         Debug( LDAP_DEBUG_TRACE,
 282                                 "ldbm_back_modrdn: wr to new parent OK np=%p, id=%ld\n",
 283                                 (void *) np, np->e_id, 0 );
 284
 285                         /* check newSuperior for "children" acl */
 286                         if ( !access_allowed( op, np, children, NULL,
 287                                               ACL_WRITE, NULL ) )
 288                         {
 289                                 Debug( LDAP_DEBUG_TRACE,
 290                                        "ldbm_back_modrdn: no wr to newSup children\n",
 291                                        0, 0, 0 );
 292
 293                                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 294                                 goto return_results;
 295                         }
 296
 297                         if ( is_entry_alias( np ) ) {
 298                                 /* parent is an alias, don't allow add */
 299                                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 300
 301
 302                                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 303                                     "newSuperior is an alias" );
 304
 305                                 goto return_results;
 306                         }
 307
 308                         if ( is_entry_referral( np ) ) {
 309                                 /* parent is a referral, don't allow add */
 310                                 Debug( LDAP_DEBUG_TRACE, "entry (%s) is referral\n",
 311                                         np->e_dn, 0, 0 );
 312
 313                                 send_ldap_error( op, rs, LDAP_OTHER,
 314                                     "newSuperior is a referral" );
 315
 316                                 goto return_results;
 317                         }
 318
 319                 } else {
 320
 321                         /* no parent, must be root to modify newSuperior */
 322                         if ( isroot == -1 ) {
 323                                 isroot = be_isroot( op );
 324                         }
 325
 326                         if ( ! isroot ) {
 327                                 if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 328                                         || be_shadow_update( op ) ) {
 329                                         int     can_access;
 330                                         np = (Entry *)&slap_entry_root;
 331
 332                                         can_access = access_allowed( op, np,
 333                                                         children, NULL, ACL_WRITE, NULL );
 334                                         np = NULL;
 335
 336                                         /* check parent for "children" acl */
 337                                         if ( ! can_access ) {
 338                                                 Debug( LDAP_DEBUG_TRACE,
 339                                                         "<=- ldbm_back_modrdn: no "
 340                                                         "access to new superior\n", 0, 0, 0 );
 341
 342                                                 send_ldap_error( op, rs,
 343                                                         LDAP_INSUFFICIENT_ACCESS,
 344                                                         NULL );
 345                                                 goto return_results;
 346                                         }
 347
 348                                 } else {
 349                                         Debug( LDAP_DEBUG_TRACE,
 350                                                 "<=- ldbm_back_modrdn: \"\" "
 351                                                 "not allowed as new superior\n",
 352                                                 0, 0, 0);
 353
 354                                         send_ldap_error( op, rs,
 355                                                 LDAP_INSUFFICIENT_ACCESS,
 356                                                 NULL );
 357                                         goto return_results;
 358                                 }
 359                         }
 360                 }
 361
 362                 Debug( LDAP_DEBUG_TRACE,
 363                     "ldbm_back_modrdn: wr to new parent's children OK\n",
 364                     0, 0, 0 );
 365
 366                 new_parent_dn = op->oq_modrdn.rs_newSup;
 367         }
 368
 369         /* Build target dn and make sure target entry doesn't exist already. */
 370         build_new_dn( &new_dn, new_parent_dn, &op->oq_modrdn.rs_newrdn, NULL );
 371         dnNormalize( 0, NULL, NULL, &new_dn, &new_ndn, NULL );
 372
 373         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: new ndn=%s\n",
 374             new_ndn.bv_val, 0, 0 );
 375
 376         /* check for abandon */
 377         if ( op->o_abandon ) {
 378                 goto return_results;
 379         }
 380
 381         if ( ( rc_id = dn2id ( op->o_bd, &new_ndn, &id ) ) || id != NOID ) {
 382                 /* if (rc_id) something bad happened to ldbm cache */
 383                 rs->sr_err = rc_id ? LDAP_OTHER : LDAP_ALREADY_EXISTS;
 384                 send_ldap_result( op, rs );
 385                 goto return_results;
 386         }
 387
 388         Debug( LDAP_DEBUG_TRACE,
 389             "ldbm_back_modrdn: new ndn=%s does not exist\n",
 390             new_ndn.bv_val, 0, 0 );
 391
 392         /* Get attribute type and attribute value of our new rdn, we will
 393          * need to add that to our new entry
 394          */
 395         if ( ldap_bv2rdn( &op->oq_modrdn.rs_newrdn, &new_rdn, (char **)&rs->sr_text,
 396                 LDAP_DN_FORMAT_LDAP ) )
 397         {
 398                 Debug( LDAP_DEBUG_TRACE,
 399                         "ldbm_back_modrdn: can't figure out "
 400                         "type(s)/values(s) of newrdn\n",
 401                         0, 0, 0 );
 402                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX,
 403                                     "unknown type(s) used in RDN" );
 404                 goto return_results;
 405         }
 406
 407         Debug( LDAP_DEBUG_TRACE,
 408                 "ldbm_back_modrdn: new_rdn_type=\"%s\", "
 409                 "new_rdn_val=\"%s\"\n",
 410                 new_rdn[ 0 ]->la_attr.bv_val,
 411                 new_rdn[ 0 ]->la_value.bv_val, 0 );
 412
 413         if ( op->oq_modrdn.rs_deleteoldrdn ) {
 414                 if ( ldap_bv2rdn( &op->o_req_dn, &old_rdn, (char **)&rs->sr_text,
 415                         LDAP_DN_FORMAT_LDAP ) )
 416                 {
 417                         Debug( LDAP_DEBUG_TRACE,
 418                                 "ldbm_back_modrdn: can't figure out "
 419                                 "the old_rdn type(s)/value(s)\n",
 420                                 0, 0, 0 );
 421                         send_ldap_error( op, rs, LDAP_OTHER,
 422                                     "cannot parse RDN from old DN" );
 423                         goto return_results;
 424                 }
 425         }
 426
 427         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: DN_X500\n",
 428                0, 0, 0 );
 429
 430         if ( slap_modrdn2mods( op, rs, e, old_rdn, new_rdn, &mod ) != LDAP_SUCCESS ) {
 431                 send_ldap_result( op, rs );
 432                 goto return_results;
 433         }
 434
 435         /* check for abandon */
 436         if ( op->o_abandon ) {
 437                 goto return_results;
 438         }
 439
 440         (void) cache_delete_entry( &li->li_cache, e );
 441
 442         free( e->e_dn );
 443         old_ndn = e->e_nname;
 444         e->e_name = new_dn;
 445         e->e_nname = new_ndn;
 446         new_dn.bv_val = NULL;
 447         new_ndn.bv_val = NULL;
 448
 449         /* NOTE: after this you must not free new_dn or new_ndn!
 450          * They are used by cache.
 451          */
 452
 453         /* modify memory copy of entry */
 454         rs->sr_err = ldbm_modify_internal( op, &mod[0], e,
 455                 &rs->sr_text, textbuf, textlen );
 456         switch ( rs->sr_err ) {
 457         case LDAP_SUCCESS:
 458                 break;
 459
 460         default:
 461                 send_ldap_result( op, rs );
 462                 /* FALLTHRU */
 463         case SLAPD_ABANDON:
 464                 goto return_results;
 465         }
 466
 467         /*
 468          * NOTE: the backend MUST delete then add the entry,
 469          *              otherwise indexing may get hosed
 470          * FIXME: if a new ID was used, the add could be done first.
 471          *              that would be safer.
 472          */
 473
 474         /* delete old one */
 475         if ( dn2id_delete( op->o_bd, &old_ndn, e->e_id ) != 0 ) {
 476                 send_ldap_error( op, rs, LDAP_OTHER,
 477                         "DN index delete fail" );
 478                 goto return_results;
 479         }
 480
 481         /* add new one */
 482         if ( dn2id_add( op->o_bd, &e->e_nname, e->e_id ) != 0 ) {
 483                 /* try to repair old entry - probably hopeless */
 484         if( dn2id_add( op->o_bd, &old_ndn, e->e_id) != 0 ) {
 485                         send_ldap_error( op, rs, LDAP_OTHER,
 486                                 "DN index add and repair failed" );
 487                 } else {
 488                         send_ldap_error( op, rs, LDAP_OTHER,
 489                                 "DN index add failed" );
 490                 }
 491                 goto return_results;
 492         }
 493
 494         /* id2entry index */
 495         if ( id2entry_add( op->o_bd, e ) != 0 ) {
 496                 /* Try to undo */
 497                 int rc;
 498                 rc = dn2id_delete( op->o_bd, &e->e_nname, e->e_id );
 499                 rc |= dn2id_add( op->o_bd, &old_ndn, e->e_id );
 500                 if( rc ) {
 501                         send_ldap_error( op, rs, LDAP_OTHER,
 502                                 "entry update and repair failed" );
 503                 } else {
 504                         send_ldap_error( op, rs, LDAP_OTHER,
 505                                 "entry update failed" );
 506                 }
 507                 goto return_results;
 508         }
 509
 510         (void) cache_update_entry( &li->li_cache, e );
 511
 512         rs->sr_err = LDAP_SUCCESS;
 513         rs->sr_text = NULL;
 514         send_ldap_result( op, rs );
 515         cache_entry_commit( e );
 516
 517 return_results:
 518         if( new_dn.bv_val != NULL ) free( new_dn.bv_val );
 519         if( new_ndn.bv_val != NULL ) free( new_ndn.bv_val );
 520         if( old_ndn.bv_val != NULL ) free( old_ndn.bv_val );
 521
 522         /* LDAP v2 supporting correct attribute handling. */
 523         if ( new_rdn != NULL ) {
 524                 ldap_rdnfree( new_rdn );
 525         }
 526         if ( old_rdn != NULL ) {
 527                 ldap_rdnfree( old_rdn );
 528         }
 529         if ( mod != NULL ) {
 530                 Modifications *tmp;
 531                 for (; mod; mod = tmp ) {
 532                         /* slap_modrdn2mods does things one way,
 533                          * slap_mods_opattrs does it differently
 534                          */
 535                         if ( mod->sml_op != SLAP_MOD_SOFTADD &&
 536                                 mod->sml_op != LDAP_MOD_DELETE ) break;
 537                         if ( mod->sml_nvalues ) free( mod->sml_nvalues[0].bv_val );
 538                         tmp = mod->sml_next;
 539                         free( mod );
 540                 }
 541                 slap_mods_free( mod );
 542         }
 543
 544         /* LDAP v3 Support */
 545         if( np != NULL ) {
 546                 /* free new parent and writer lock */
 547                 cache_return_entry_w( &li->li_cache, np );
 548         }
 549
 550         if( p != NULL ) {
 551                 /* free parent and writer lock */
 552                 cache_return_entry_w( &li->li_cache, p );
 553         }
 554
 555         /* free entry and writer lock */
 556         cache_return_entry_w( &li->li_cache, e );
 557         ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 558         rs->sr_text = NULL;
 559         return( rs->sr_err );
 560 }