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