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