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 1998-2004 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                 if ( matched != NULL ) {
  81                         rs->sr_matched = strdup( matched->e_dn );
  82                         rs->sr_ref = is_entry_referral( matched )
  83                                 ? get_entry_referrals( op, matched )
  84                                 : NULL;
  85                         cache_return_entry_r( &li->li_cache, matched );
  86                 } else {
  87                         BerVarray deref = NULL;
  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                 free( (char *)rs->sr_matched );
 109                 rs->sr_ref = NULL;
 110                 rs->sr_matched = NULL;
 111                 return rs->sr_err;
 112         }
 113
 114         /* check entry for "entry" acl */
 115         if ( ! access_allowed( op, e,
 116                 entry, NULL, ACL_WRITE, NULL ) )
 117         {
 118                 Debug( LDAP_DEBUG_TRACE,
 119                         "<=- ldbm_back_modrdn: no write access to entry\n", 0,
 120                         0, 0 );
 121
 122                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 123                         "no write access to entry" );
 124
 125                 goto return_results;
 126         }
 127
 128         if (!manageDSAit && is_entry_referral( e ) ) {
 129                 /* parent is a referral, don't allow add */
 130                 /* parent is an alias, don't allow add */
 131                 rs->sr_ref = get_entry_referrals( op, e );
 132
 133                 Debug( LDAP_DEBUG_TRACE, "entry %s is referral\n", e->e_dn,
 134                     0, 0 );
 135
 136                 rs->sr_err = LDAP_REFERRAL;
 137                 rs->sr_matched = e->e_name.bv_val;
 138                 send_ldap_result( op, rs );
 139
 140                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
 141                 rs->sr_ref = NULL;
 142                 rs->sr_matched = NULL;
 143                 goto return_results;
 144         }
 145
 146         if ( has_children( op->o_bd, e ) ) {
 147                 Debug( LDAP_DEBUG_TRACE, "entry %s has children\n", e->e_dn,
 148                     0, 0 );
 149
 150                 send_ldap_error( op, rs, LDAP_NOT_ALLOWED_ON_NONLEAF,
 151                     "subtree rename not supported" );
 152                 goto return_results;
 153         }
 154
 155         if ( be_issuffix( op->o_bd, &e->e_nname ) ) {
 156                 p_ndn = slap_empty_bv ;
 157         } else {
 158                 dnParent( &e->e_nname, &p_ndn );
 159         }
 160
 161         if ( p_ndn.bv_len != 0 ) {
 162                 /* Make sure parent entry exist and we can write its
 163                  * children.
 164                  */
 165
 166                 if( (p = dn2entry_w( op->o_bd, &p_ndn, NULL )) == NULL) {
 167                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
 168                                 0, 0, 0);
 169
 170                         send_ldap_error( op, rs, LDAP_OTHER,
 171                                 "parent entry does not exist" );
 172
 173                         goto return_results;
 174                 }
 175
 176                 /* check parent for "children" acl */
 177                 if ( ! access_allowed( op, p,
 178                         children, NULL, ACL_WRITE, NULL ) )
 179                 {
 180                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
 181                                 0, 0 );
 182
 183                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 184                                 NULL );
 185                         goto return_results;
 186                 }
 187
 188                 Debug( LDAP_DEBUG_TRACE,
 189                        "ldbm_back_modrdn: wr to children of entry %s OK\n",
 190                        p_ndn.bv_val, 0, 0 );
 191
 192                 if ( p_ndn.bv_val == slap_empty_bv.bv_val ) {
 193                         p_dn = slap_empty_bv;
 194                 } else {
 195                         dnParent( &e->e_name, &p_dn );
 196                 }
 197
 198                 Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: parent dn=%s\n",
 199                        p_dn.bv_val, 0, 0 );
 200
 201         } else {
 202                 /* no parent, must be root to modify rdn */
 203                 isroot = be_isroot( op );
 204                 if ( ! isroot ) {
 205                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 206                                 || be_shadow_update( op ) ) {
 207                                 int     can_access;
 208                                 p = (Entry *)&slap_entry_root;
 209
 210                                 can_access = access_allowed( op, p,
 211                                                 children, NULL, ACL_WRITE, NULL );
 212                                 p = NULL;
 213
 214                                 /* check parent for "children" acl */
 215                                 if ( ! can_access ) {
 216                                         Debug( LDAP_DEBUG_TRACE,
 217                                                 "<=- ldbm_back_modrdn: no "
 218                                                 "access to parent\n", 0, 0, 0 );
 219
 220                                         send_ldap_error( op, rs,
 221                                                 LDAP_INSUFFICIENT_ACCESS,
 222                                                 NULL );
 223                                         goto return_results;
 224                                 }
 225
 226                         } else {
 227                                 Debug( LDAP_DEBUG_TRACE,
 228                                         "<=- ldbm_back_modrdn: no parent & "
 229                                         "not root\n", 0, 0, 0);
 230
 231                                 send_ldap_error( op, rs,
 232                                         LDAP_INSUFFICIENT_ACCESS,
 233                                         NULL );
 234                                 goto return_results;
 235                         }
 236                 }
 237
 238                 Debug( LDAP_DEBUG_TRACE,
 239                        "ldbm_back_modrdn: no parent, locked root\n",
 240                        0, 0, 0 );
 241         }
 242
 243         new_parent_dn = &p_dn;  /* New Parent unless newSuperior given */
 244
 245         if ( op->oq_modrdn.rs_newSup != NULL ) {
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "ldbm_back_modrdn: new parent \"%s\" requested...\n",
 248                         op->oq_modrdn.rs_newSup->bv_val, 0, 0 );
 249
 250                 np_ndn = op->oq_modrdn.rs_nnewSup;
 251
 252                 /* newSuperior == oldParent? */
 253                 if ( dn_match( &p_ndn, np_ndn ) ) {
 254                         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: "
 255                                 "new parent\"%s\" seems to be the same as the "
 256                                 "old parent \"%s\"\n",
 257                                 op->oq_modrdn.rs_newSup->bv_val, p_dn.bv_val, 0 );
 258
 259                         op->oq_modrdn.rs_newSup = NULL; /* ignore newSuperior */
 260                 }
 261         }
 262
 263         if ( op->oq_modrdn.rs_newSup != NULL ) {
 264                 /* newSuperior == entry being moved?, if so ==> ERROR */
 265                 /* Get Entry with dn=newSuperior. Does newSuperior exist? */
 266
 267                 if ( op->oq_modrdn.rs_nnewSup->bv_len ) {
 268                         if( (np = dn2entry_w( op->o_bd, np_ndn, NULL )) == NULL) {
 269                                 Debug( LDAP_DEBUG_TRACE,
 270                                     "ldbm_back_modrdn: newSup(ndn=%s) not here!\n",
 271                                     np_ndn->bv_val, 0, 0);
 272
 273                                 send_ldap_error( op, rs, LDAP_OTHER,
 274                                         "newSuperior not found" );
 275                                 goto return_results;
 276                         }
 277
 278                         Debug( LDAP_DEBUG_TRACE,
 279                                 "ldbm_back_modrdn: wr to new parent OK np=%p, id=%ld\n",
 280                                 (void *) np, np->e_id, 0 );
 281
 282                         /* check newSuperior for "children" acl */
 283                         if ( !access_allowed( op, np, children, NULL,
 284                                               ACL_WRITE, NULL ) )
 285                         {
 286                                 Debug( LDAP_DEBUG_TRACE,
 287                                        "ldbm_back_modrdn: no wr to newSup children\n",
 288                                        0, 0, 0 );
 289
 290                                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 291                                 goto return_results;
 292                         }
 293
 294                         if ( is_entry_alias( np ) ) {
 295                                 /* parent is an alias, don't allow add */
 296                                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 297
 298
 299                                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 300                                     "newSuperior is an alias" );
 301
 302                                 goto return_results;
 303                         }
 304
 305                         if ( is_entry_referral( np ) ) {
 306                                 /* parent is a referral, don't allow add */
 307                                 Debug( LDAP_DEBUG_TRACE, "entry (%s) is referral\n",
 308                                         np->e_dn, 0, 0 );
 309
 310                                 send_ldap_error( op, rs, LDAP_OTHER,
 311                                     "newSuperior is a referral" );
 312
 313                                 goto return_results;
 314                         }
 315
 316                 } else {
 317
 318                         /* no parent, must be root to modify newSuperior */
 319                         if ( isroot == -1 ) {
 320                                 isroot = be_isroot( op );
 321                         }
 322
 323                         if ( ! isroot ) {
 324                                 if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 325                                         || be_shadow_update( op ) ) {
 326                                         int     can_access;
 327                                         np = (Entry *)&slap_entry_root;
 328
 329                                         can_access = access_allowed( op, np,
 330                                                         children, NULL, ACL_WRITE, NULL );
 331                                         np = NULL;
 332
 333                                         /* check parent for "children" acl */
 334                                         if ( ! can_access ) {
 335                                                 Debug( LDAP_DEBUG_TRACE,
 336                                                         "<=- ldbm_back_modrdn: no "
 337                                                         "access to new superior\n", 0, 0, 0 );
 338
 339                                                 send_ldap_error( op, rs,
 340                                                         LDAP_INSUFFICIENT_ACCESS,
 341                                                         NULL );
 342                                                 goto return_results;
 343                                         }
 344
 345                                 } else {
 346                                         Debug( LDAP_DEBUG_TRACE,
 347                                                 "<=- ldbm_back_modrdn: \"\" "
 348                                                 "not allowed as new superior\n",
 349                                                 0, 0, 0);
 350
 351                                         send_ldap_error( op, rs,
 352                                                 LDAP_INSUFFICIENT_ACCESS,
 353                                                 NULL );
 354                                         goto return_results;
 355                                 }
 356                         }
 357                 }
 358
 359                 Debug( LDAP_DEBUG_TRACE,
 360                     "ldbm_back_modrdn: wr to new parent's children OK\n",
 361                     0, 0, 0 );
 362
 363                 new_parent_dn = op->oq_modrdn.rs_newSup;
 364         }
 365
 366         /* Build target dn and make sure target entry doesn't exist already. */
 367         build_new_dn( &new_dn, new_parent_dn, &op->oq_modrdn.rs_newrdn, NULL );
 368         dnNormalize( 0, NULL, NULL, &new_dn, &new_ndn, NULL );
 369
 370         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: new ndn=%s\n",
 371             new_ndn.bv_val, 0, 0 );
 372
 373         /* check for abandon */
 374         if ( op->o_abandon ) {
 375                 goto return_results;
 376         }
 377
 378         if ( ( rc_id = dn2id ( op->o_bd, &new_ndn, &id ) ) || id != NOID ) {
 379                 /* if (rc_id) something bad happened to ldbm cache */
 380                 rs->sr_err = rc_id ? LDAP_OTHER : LDAP_ALREADY_EXISTS;
 381                 send_ldap_result( op, rs );
 382                 goto return_results;
 383         }
 384
 385         Debug( LDAP_DEBUG_TRACE,
 386             "ldbm_back_modrdn: new ndn=%s does not exist\n",
 387             new_ndn.bv_val, 0, 0 );
 388
 389         /* Get attribute type and attribute value of our new rdn, we will
 390          * need to add that to our new entry
 391          */
 392         if ( ldap_bv2rdn( &op->oq_modrdn.rs_newrdn, &new_rdn, (char **)&rs->sr_text,
 393                 LDAP_DN_FORMAT_LDAP ) )
 394         {
 395                 Debug( LDAP_DEBUG_TRACE,
 396                         "ldbm_back_modrdn: can't figure out "
 397                         "type(s)/values(s) of newrdn\n",
 398                         0, 0, 0 );
 399                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX,
 400                                     "unknown type(s) used in RDN" );
 401                 goto return_results;
 402         }
 403
 404         Debug( LDAP_DEBUG_TRACE,
 405                 "ldbm_back_modrdn: new_rdn_type=\"%s\", "
 406                 "new_rdn_val=\"%s\"\n",
 407                 new_rdn[ 0 ]->la_attr.bv_val,
 408                 new_rdn[ 0 ]->la_value.bv_val, 0 );
 409
 410         if ( op->oq_modrdn.rs_deleteoldrdn ) {
 411                 if ( ldap_bv2rdn( &op->o_req_dn, &old_rdn, (char **)&rs->sr_text,
 412                         LDAP_DN_FORMAT_LDAP ) )
 413                 {
 414                         Debug( LDAP_DEBUG_TRACE,
 415                                 "ldbm_back_modrdn: can't figure out "
 416                                 "the old_rdn type(s)/value(s)\n",
 417                                 0, 0, 0 );
 418                         send_ldap_error( op, rs, LDAP_OTHER,
 419                                     "cannot parse RDN from old DN" );
 420                         goto return_results;
 421                 }
 422         }
 423
 424         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: DN_X500\n",
 425                0, 0, 0 );
 426
 427         if ( slap_modrdn2mods( op, rs, e, old_rdn, new_rdn, &mod ) != LDAP_SUCCESS ) {
 428                 send_ldap_result( op, rs );
 429                 goto return_results;
 430         }
 431
 432         /* check for abandon */
 433         if ( op->o_abandon ) {
 434                 goto return_results;
 435         }
 436
 437         (void) cache_delete_entry( &li->li_cache, e );
 438
 439         free( e->e_dn );
 440         old_ndn = e->e_nname;
 441         e->e_name = new_dn;
 442         e->e_nname = new_ndn;
 443         new_dn.bv_val = NULL;
 444         new_ndn.bv_val = NULL;
 445
 446         /* NOTE: after this you must not free new_dn or new_ndn!
 447          * They are used by cache.
 448          */
 449
 450         /* modify memory copy of entry */
 451         rs->sr_err = ldbm_modify_internal( op, &mod[0], e,
 452                 &rs->sr_text, textbuf, textlen );
 453         switch ( rs->sr_err ) {
 454         case LDAP_SUCCESS:
 455                 break;
 456
 457         default:
 458                 send_ldap_result( op, rs );
 459                 /* FALLTHRU */
 460         case SLAPD_ABANDON:
 461                 goto return_results;
 462         }
 463
 464         /*
 465          * NOTE: the backend MUST delete then add the entry,
 466          *              otherwise indexing may get hosed
 467          * FIXME: if a new ID was used, the add could be done first.
 468          *              that would be safer.
 469          */
 470
 471         /* delete old one */
 472         if ( dn2id_delete( op->o_bd, &old_ndn, e->e_id ) != 0 ) {
 473                 send_ldap_error( op, rs, LDAP_OTHER,
 474                         "DN index delete fail" );
 475                 goto return_results;
 476         }
 477
 478         /* add new one */
 479         if ( dn2id_add( op->o_bd, &e->e_nname, e->e_id ) != 0 ) {
 480                 /* try to repair old entry - probably hopeless */
 481         if( dn2id_add( op->o_bd, &old_ndn, e->e_id) != 0 ) {
 482                         send_ldap_error( op, rs, LDAP_OTHER,
 483                                 "DN index add and repair failed" );
 484                 } else {
 485                         send_ldap_error( op, rs, LDAP_OTHER,
 486                                 "DN index add failed" );
 487                 }
 488                 goto return_results;
 489         }
 490
 491         /* id2entry index */
 492         if ( id2entry_add( op->o_bd, e ) != 0 ) {
 493                 /* Try to undo */
 494                 int rc;
 495                 rc = dn2id_delete( op->o_bd, &e->e_nname, e->e_id );
 496                 rc |= dn2id_add( op->o_bd, &old_ndn, e->e_id );
 497                 if( rc ) {
 498                         send_ldap_error( op, rs, LDAP_OTHER,
 499                                 "entry update and repair failed" );
 500                 } else {
 501                         send_ldap_error( op, rs, LDAP_OTHER,
 502                                 "entry update failed" );
 503                 }
 504                 goto return_results;
 505         }
 506
 507         (void) cache_update_entry( &li->li_cache, e );
 508
 509         rs->sr_err = LDAP_SUCCESS;
 510         rs->sr_text = NULL;
 511         send_ldap_result( op, rs );
 512         cache_entry_commit( e );
 513
 514 return_results:
 515         if( new_dn.bv_val != NULL ) free( new_dn.bv_val );
 516         if( new_ndn.bv_val != NULL ) free( new_ndn.bv_val );
 517         if( old_ndn.bv_val != NULL ) free( old_ndn.bv_val );
 518
 519         /* LDAP v2 supporting correct attribute handling. */
 520         if ( new_rdn != NULL ) {
 521                 ldap_rdnfree( new_rdn );
 522         }
 523         if ( old_rdn != NULL ) {
 524                 ldap_rdnfree( old_rdn );
 525         }
 526         if ( mod != NULL ) {
 527                 Modifications *tmp;
 528                 for (; mod; mod = tmp ) {
 529                         /* slap_modrdn2mods does things one way,
 530                          * slap_mods_opattrs does it differently
 531                          */
 532                         if ( mod->sml_op != SLAP_MOD_SOFTADD &&
 533                                 mod->sml_op != LDAP_MOD_DELETE ) break;
 534                         if ( mod->sml_nvalues ) free( mod->sml_nvalues[0].bv_val );
 535                         tmp = mod->sml_next;
 536                         free( mod );
 537                 }
 538                 slap_mods_free( mod );
 539         }
 540
 541         /* LDAP v3 Support */
 542         if( np != NULL ) {
 543                 /* free new parent and writer lock */
 544                 cache_return_entry_w( &li->li_cache, np );
 545         }
 546
 547         if( p != NULL ) {
 548                 /* free parent and writer lock */
 549                 cache_return_entry_w( &li->li_cache, p );
 550         }
 551
 552         /* free entry and writer lock */
 553         cache_return_entry_w( &li->li_cache, e );
 554         ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 555         rs->sr_text = NULL;
 556         return( rs->sr_err );
 557 }