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 1998-2006 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         int             rc_id = 0;
  51         ID              id = NOID;
  52         char            textbuf[SLAP_TEXT_BUFLEN];
  53         size_t          textlen = sizeof textbuf;
  54         /* Added to support newSuperior */
  55         Entry           *np = NULL;     /* newSuperior Entry */
  56         struct berval   *np_ndn = NULL; /* newSuperior ndn */
  57         struct berval   *new_parent_dn = NULL;  /* np_dn, p_dn, or NULL */
  58         /* Used to interface with ldbm_modify_internal() */
  59         int             manageDSAit = get_manageDSAit( op );
  60
  61         Debug( LDAP_DEBUG_TRACE,
  62                 "==>ldbm_back_modrdn: dn: %s newSuperior=%s\n",
  63                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "NULL",
  64                 ( op->oq_modrdn.rs_newSup && op->oq_modrdn.rs_newSup->bv_len )
  65                         ? op->oq_modrdn.rs_newSup->bv_val : "NULL", 0 );
  66
  67         slap_mods_opattrs( op, &op->orr_modlist, 1 );
  68
  69         /* grab giant lock for writing */
  70         ldap_pvt_thread_rdwr_wlock(&li->li_giant_rwlock);
  71
  72         e = dn2entry_w( op->o_bd, &op->o_req_ndn, &matched );
  73
  74         /* get entry with writer lock */
  75         /* FIXME: dn2entry() should return non-glue entry */
  76         if (( e == NULL  ) || ( !manageDSAit && e && is_entry_glue( e ))) {
  77                 if ( matched != NULL ) {
  78                         rs->sr_matched = strdup( matched->e_dn );
  79                         rs->sr_ref = is_entry_referral( matched )
  80                                 ? get_entry_referrals( op, matched )
  81                                 : NULL;
  82                         cache_return_entry_r( &li->li_cache, matched );
  83                 } else {
  84                         rs->sr_ref = referral_rewrite( default_referral, NULL,
  85                                                 &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  86                 }
  87
  88                 ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
  89
  90                 rs->sr_err = LDAP_REFERRAL;
  91                 send_ldap_result( op, rs );
  92
  93                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  94                 free( (char *)rs->sr_matched );
  95                 rs->sr_ref = NULL;
  96                 rs->sr_matched = NULL;
  97                 return rs->sr_err;
  98         }
  99
 100         /* check entry for "entry" acl */
 101         if ( ! access_allowed( op, e, entry, NULL, ACL_WRITE, NULL ) )
 102         {
 103                 Debug( LDAP_DEBUG_TRACE,
 104                         "<=- ldbm_back_modrdn: no write access to entry\n", 0,
 105                         0, 0 );
 106
 107                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 108                         "no write access to entry" );
 109
 110                 goto return_results;
 111         }
 112
 113         if (!manageDSAit && is_entry_referral( e ) ) {
 114                 /* parent is a referral, don't allow add */
 115                 /* parent is an alias, don't allow add */
 116                 rs->sr_ref = get_entry_referrals( op, e );
 117
 118                 Debug( LDAP_DEBUG_TRACE, "entry %s is referral\n", e->e_dn,
 119                     0, 0 );
 120
 121                 rs->sr_err = LDAP_REFERRAL;
 122                 rs->sr_matched = e->e_name.bv_val;
 123                 send_ldap_result( op, rs );
 124
 125                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
 126                 rs->sr_ref = NULL;
 127                 rs->sr_matched = NULL;
 128                 goto return_results;
 129         }
 130
 131         if ( has_children( op->o_bd, e ) ) {
 132                 Debug( LDAP_DEBUG_TRACE, "entry %s has children\n", e->e_dn,
 133                     0, 0 );
 134
 135                 send_ldap_error( op, rs, LDAP_NOT_ALLOWED_ON_NONLEAF,
 136                     "subtree rename not supported" );
 137                 goto return_results;
 138         }
 139
 140         if ( be_issuffix( op->o_bd, &e->e_nname ) ) {
 141                 p_ndn = slap_empty_bv ;
 142         } else {
 143                 dnParent( &e->e_nname, &p_ndn );
 144         }
 145
 146         if ( p_ndn.bv_len != 0 ) {
 147                 /* Make sure parent entry exist and we can write its
 148                  * children.
 149                  */
 150
 151                 if( (p = dn2entry_w( op->o_bd, &p_ndn, NULL )) == NULL) {
 152                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
 153                                 0, 0, 0);
 154
 155                         send_ldap_error( op, rs, LDAP_OTHER,
 156                                 "parent entry does not exist" );
 157
 158                         goto return_results;
 159                 }
 160         } else {
 161                 p = (Entry *)&slap_entry_root;
 162         }
 163
 164         /* check parent for "children" acl */
 165         rs->sr_err = access_allowed( op, p, children, NULL,
 166                         op->oq_modrdn.rs_newSup != NULL ?
 167                                 ACL_WDEL : ACL_WRITE,
 168                         NULL );
 169
 170         if ( BER_BVISEMPTY( &p_ndn ))
 171                 p = NULL;
 172
 173         if ( !rs->sr_err )
 174         {
 175                 Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
 176                         0, 0 );
 177
 178                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 179                         NULL );
 180                 goto return_results;
 181         }
 182
 183         Debug( LDAP_DEBUG_TRACE,
 184                    "ldbm_back_modrdn: wr to children of entry %s OK\n",
 185                    p_ndn.bv_val, 0, 0 );
 186
 187         if ( p_ndn.bv_val == slap_empty_bv.bv_val ) {
 188                 p_dn = slap_empty_bv;
 189         } else {
 190                 dnParent( &e->e_name, &p_dn );
 191         }
 192
 193         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: parent dn=%s\n",
 194                    p_dn.bv_val, 0, 0 );
 195
 196         new_parent_dn = &p_dn;  /* New Parent unless newSuperior given */
 197
 198         if ( op->oq_modrdn.rs_newSup != NULL ) {
 199                 Debug( LDAP_DEBUG_TRACE,
 200                         "ldbm_back_modrdn: new parent \"%s\" requested...\n",
 201                         op->oq_modrdn.rs_newSup->bv_val, 0, 0 );
 202
 203                 np_ndn = op->oq_modrdn.rs_nnewSup;
 204
 205                 /* newSuperior == oldParent? */
 206                 if ( dn_match( &p_ndn, np_ndn ) ) {
 207                         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: "
 208                                 "new parent\"%s\" seems to be the same as the "
 209                                 "old parent \"%s\"\n",
 210                                 op->oq_modrdn.rs_newSup->bv_val, p_dn.bv_val, 0 );
 211
 212                         op->oq_modrdn.rs_newSup = NULL; /* ignore newSuperior */
 213                 }
 214         }
 215
 216         if ( op->oq_modrdn.rs_newSup != NULL ) {
 217                 /* newSuperior == entry being moved?, if so ==> ERROR */
 218                 /* Get Entry with dn=newSuperior. Does newSuperior exist? */
 219
 220                 if ( op->oq_modrdn.rs_nnewSup->bv_len ) {
 221                         if( (np = dn2entry_w( op->o_bd, np_ndn, NULL )) == NULL) {
 222                                 Debug( LDAP_DEBUG_TRACE,
 223                                     "ldbm_back_modrdn: newSup(ndn=%s) not here!\n",
 224                                     np_ndn->bv_val, 0, 0);
 225
 226                                 send_ldap_error( op, rs, LDAP_NO_SUCH_OBJECT,
 227                                         "newSuperior not found" );
 228                                 goto return_results;
 229                         }
 230
 231                         Debug( LDAP_DEBUG_TRACE,
 232                                 "ldbm_back_modrdn: wr to new parent OK np=%p, id=%ld\n",
 233                                 (void *) np, np->e_id, 0 );
 234
 235                         /* check newSuperior for "children" acl */
 236                         if ( !access_allowed( op, np, children, NULL,
 237                                               ACL_WADD, NULL ) )
 238                         {
 239                                 Debug( LDAP_DEBUG_TRACE,
 240                                        "ldbm_back_modrdn: no wr to newSup children\n",
 241                                        0, 0, 0 );
 242
 243                                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 244                                 goto return_results;
 245                         }
 246
 247                         if ( is_entry_alias( np ) ) {
 248                                 /* parent is an alias, don't allow add */
 249                                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 250
 251
 252                                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 253                                     "newSuperior is an alias" );
 254
 255                                 goto return_results;
 256                         }
 257
 258                         if ( is_entry_referral( np ) ) {
 259                                 /* parent is a referral, don't allow add */
 260                                 Debug( LDAP_DEBUG_TRACE, "entry (%s) is referral\n",
 261                                         np->e_dn, 0, 0 );
 262
 263                                 send_ldap_error( op, rs, LDAP_OTHER,
 264                                     "newSuperior is a referral" );
 265
 266                                 goto return_results;
 267                         }
 268
 269                 } else {
 270                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 271                                 || be_shadow_update( op ) ) {
 272                                 int     can_access;
 273                                 np = (Entry *)&slap_entry_root;
 274
 275                                 can_access = access_allowed( op, np,
 276                                                 children, NULL, ACL_WADD, NULL );
 277                                 np = NULL;
 278
 279                                 /* check parent for "children" acl */
 280                                 if ( ! can_access ) {
 281                                         Debug( LDAP_DEBUG_TRACE,
 282                                                 "<=- ldbm_back_modrdn: no "
 283                                                 "access to new superior\n", 0, 0, 0 );
 284
 285                                                 send_ldap_error( op, rs,
 286                                                         LDAP_INSUFFICIENT_ACCESS,
 287                                                         NULL );
 288                                                 goto return_results;
 289                                         }
 290
 291                         } else {
 292                                 Debug( LDAP_DEBUG_TRACE,
 293                                         "<=- ldbm_back_modrdn: \"\" "
 294                                         "not allowed as new superior\n",
 295                                         0, 0, 0);
 296
 297                                 send_ldap_error( op, rs,
 298                                         LDAP_INSUFFICIENT_ACCESS,
 299                                         NULL );
 300                                 goto return_results;
 301                         }
 302                 }
 303
 304                 Debug( LDAP_DEBUG_TRACE,
 305                     "ldbm_back_modrdn: wr to new parent's children OK\n",
 306                     0, 0, 0 );
 307
 308                 new_parent_dn = op->oq_modrdn.rs_newSup;
 309         }
 310
 311         /* Build target dn and make sure target entry doesn't exist already. */
 312         build_new_dn( &new_dn, new_parent_dn, &op->oq_modrdn.rs_newrdn, NULL );
 313         dnNormalize( 0, NULL, NULL, &new_dn, &new_ndn, NULL );
 314
 315         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: new ndn=%s\n",
 316             new_ndn.bv_val, 0, 0 );
 317
 318         /* check for abandon */
 319         if ( op->o_abandon ) {
 320                 rs->sr_err = SLAPD_ABANDON;
 321                 goto return_results;
 322         }
 323
 324         if ( ( rc_id = dn2id ( op->o_bd, &new_ndn, &id ) ) || id != NOID ) {
 325                 /* if (rc_id) something bad happened to ldbm cache */
 326                 rs->sr_err = rc_id ? LDAP_OTHER : LDAP_ALREADY_EXISTS;
 327                 send_ldap_result( op, rs );
 328                 goto return_results;
 329         }
 330
 331         Debug( LDAP_DEBUG_TRACE,
 332             "ldbm_back_modrdn: new ndn=%s does not exist\n",
 333             new_ndn.bv_val, 0, 0 );
 334
 335         Debug( LDAP_DEBUG_TRACE, "ldbm_back_modrdn: DN_X500\n",
 336                0, 0, 0 );
 337
 338         assert( op->orr_modlist != NULL );
 339
 340         /* check for abandon */
 341         if ( op->o_abandon ) {
 342                 rs->sr_err = SLAPD_ABANDON;
 343                 goto return_results;
 344         }
 345
 346         (void) cache_delete_entry( &li->li_cache, e );
 347
 348         free( e->e_dn );
 349         old_ndn = e->e_nname;
 350         e->e_name = new_dn;
 351         e->e_nname = new_ndn;
 352         new_dn.bv_val = NULL;
 353         new_ndn.bv_val = NULL;
 354
 355         /* NOTE: after this you must not free new_dn or new_ndn!
 356          * They are used by cache.
 357          */
 358
 359         /* modify memory copy of entry */
 360         rs->sr_err = ldbm_modify_internal( op, op->orr_modlist, e,
 361                 &rs->sr_text, textbuf, textlen );
 362         switch ( rs->sr_err ) {
 363         case LDAP_SUCCESS:
 364                 break;
 365
 366         default:
 367                 send_ldap_result( op, rs );
 368                 /* FALLTHRU */
 369         case SLAPD_ABANDON:
 370                 goto return_results;
 371         }
 372
 373         /*
 374          * NOTE: the backend MUST delete then add the entry,
 375          *              otherwise indexing may get hosed
 376          * FIXME: if a new ID was used, the add could be done first.
 377          *              that would be safer.
 378          */
 379
 380         /* delete old one */
 381         if ( dn2id_delete( op->o_bd, &old_ndn, e->e_id ) != 0 ) {
 382                 send_ldap_error( op, rs, LDAP_OTHER,
 383                         "DN index delete fail" );
 384                 goto return_results;
 385         }
 386
 387         /* add new one */
 388         if ( dn2id_add( op->o_bd, &e->e_nname, e->e_id ) != 0 ) {
 389                 /* try to repair old entry - probably hopeless */
 390         if( dn2id_add( op->o_bd, &old_ndn, e->e_id) != 0 ) {
 391                         send_ldap_error( op, rs, LDAP_OTHER,
 392                                 "DN index add and repair failed" );
 393                 } else {
 394                         send_ldap_error( op, rs, LDAP_OTHER,
 395                                 "DN index add failed" );
 396                 }
 397                 goto return_results;
 398         }
 399
 400         /* id2entry index */
 401         if ( id2entry_add( op->o_bd, e ) != 0 ) {
 402                 /* Try to undo */
 403                 int rc;
 404                 rc = dn2id_delete( op->o_bd, &e->e_nname, e->e_id );
 405                 rc |= dn2id_add( op->o_bd, &old_ndn, e->e_id );
 406                 if( rc ) {
 407                         send_ldap_error( op, rs, LDAP_OTHER,
 408                                 "entry update and repair failed" );
 409                 } else {
 410                         send_ldap_error( op, rs, LDAP_OTHER,
 411                                 "entry update failed" );
 412                 }
 413                 goto return_results;
 414         }
 415
 416         (void) cache_update_entry( &li->li_cache, e );
 417
 418         rs->sr_err = LDAP_SUCCESS;
 419         rs->sr_text = NULL;
 420         send_ldap_result( op, rs );
 421         cache_entry_commit( e );
 422
 423 return_results:
 424         slap_graduate_commit_csn( op );
 425         if( new_dn.bv_val != NULL ) free( new_dn.bv_val );
 426         if( new_ndn.bv_val != NULL ) free( new_ndn.bv_val );
 427         if( old_ndn.bv_val != NULL ) free( old_ndn.bv_val );
 428
 429         /* LDAP v3 Support */
 430         if( np != NULL ) {
 431                 /* free new parent and writer lock */
 432                 cache_return_entry_w( &li->li_cache, np );
 433         }
 434
 435         if( p != NULL ) {
 436                 /* free parent and writer lock */
 437                 cache_return_entry_w( &li->li_cache, p );
 438         }
 439
 440         /* free entry and writer lock */
 441         cache_return_entry_w( &li->li_cache, e );
 442         ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 443         rs->sr_text = NULL;
 444         return( rs->sr_err );
 445 }