git.sur5r.net Git - openldap/blob - servers/slapd/overlays/refint.c

   1 /* refint.c - referential integrity module */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2009 The OpenLDAP Foundation.
   6  * Portions Copyright 2004 Symas Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Symas Corp. for inclusion in
  19  * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
  20  */
  21
  22 #include "portable.h"
  23
  24 /* This module maintains referential integrity for a set of
  25  * DN-valued attributes by searching for all references to a given
  26  * DN whenever the DN is changed or its entry is deleted, and making
  27  * the appropriate update.
  28  *
  29  * Updates are performed using the database rootdn in a separate task
  30  * to allow the original operation to complete immediately.
  31  */
  32
  33 #ifdef SLAPD_OVER_REFINT
  34
  35 #include <stdio.h>
  36
  37 #include <ac/string.h>
  38 #include <ac/socket.h>
  39
  40 #include "slap.h"
  41 #include "config.h"
  42 #include "ldap_rq.h"
  43
  44 static slap_overinst refint;
  45
  46 /* The DN to use in the ModifiersName for all refint updates */
  47 static BerValue refint_dn = BER_BVC("cn=Referential Integrity Overlay");
  48 static BerValue refint_ndn = BER_BVC("cn=referential integrity overlay");
  49
  50 typedef struct refint_attrs_s {
  51         struct refint_attrs_s   *next;
  52         AttributeDescription    *attr;
  53         BerVarray               old_vals;
  54         BerVarray               old_nvals;
  55         BerVarray               new_vals;
  56         BerVarray               new_nvals;
  57         int                             ra_numvals;
  58 } refint_attrs;
  59
  60 typedef struct dependents_s {
  61         struct dependents_s *next;
  62         BerValue dn;                            /* target dn */
  63         BerValue ndn;
  64         refint_attrs *attrs;
  65 } dependent_data;
  66
  67 typedef struct refint_q {
  68         struct refint_q *next;
  69         struct refint_data_s *rdata;
  70         dependent_data *attrs;          /* entries and attrs returned from callback */
  71         BackendDB *db;
  72         BerValue olddn;
  73         BerValue oldndn;
  74         BerValue newdn;
  75         BerValue newndn;
  76 } refint_q;
  77
  78 typedef struct refint_data_s {
  79         const char *message;                    /* breadcrumbs */
  80         struct refint_attrs_s *attrs;   /* list of known attrs */
  81         BerValue dn;                            /* basedn in parent, */
  82         BerValue nothing;                       /* the nothing value, if needed */
  83         BerValue nnothing;                      /* normalized nothingness */
  84         BerValue refint_dn;                     /* modifier's name */
  85         BerValue refint_ndn;                    /* normalized modifier's name */
  86         struct re_s *qtask;
  87         refint_q *qhead;
  88         refint_q *qtail;
  89         ldap_pvt_thread_mutex_t qmutex;
  90 } refint_data;
  91
  92 #define RUNQ_INTERVAL   36000   /* a long time */
  93
  94 static MatchingRule     *mr_dnSubtreeMatch;
  95
  96 enum {
  97         REFINT_ATTRS = 1,
  98         REFINT_NOTHING,
  99         REFINT_MODIFIERSNAME
 100 };
 101
 102 static ConfigDriver refint_cf_gen;
 103
 104 static ConfigTable refintcfg[] = {
 105         { "refint_attributes", "attribute...", 2, 0, 0,
 106           ARG_MAGIC|REFINT_ATTRS, refint_cf_gen,
 107           "( OLcfgOvAt:11.1 NAME 'olcRefintAttribute' "
 108           "DESC 'Attributes for referential integrity' "
 109           "EQUALITY caseIgnoreMatch "
 110           "SYNTAX OMsDirectoryString )", NULL, NULL },
 111         { "refint_nothing", "string", 2, 2, 0,
 112           ARG_DN|ARG_MAGIC|REFINT_NOTHING, refint_cf_gen,
 113           "( OLcfgOvAt:11.2 NAME 'olcRefintNothing' "
 114           "DESC 'Replacement DN to supply when needed' "
 115           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 116         { "refint_modifiersName", "DN", 2, 2, 0,
 117           ARG_DN|ARG_MAGIC|REFINT_MODIFIERSNAME, refint_cf_gen,
 118           "( OLcfgOvAt:11.3 NAME 'olcRefintModifiersName' "
 119           "DESC 'The DN to use as modifiersName' "
 120           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 121         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 122 };
 123
 124 static ConfigOCs refintocs[] = {
 125         { "( OLcfgOvOc:11.1 "
 126           "NAME 'olcRefintConfig' "
 127           "DESC 'Referential integrity configuration' "
 128           "SUP olcOverlayConfig "
 129           "MAY ( olcRefintAttribute "
 130                 "$ olcRefintNothing "
 131                 "$ olcRefintModifiersName "
 132           ") )",
 133           Cft_Overlay, refintcfg },
 134         { NULL, 0, NULL }
 135 };
 136
 137 static int
 138 refint_cf_gen(ConfigArgs *c)
 139 {
 140         slap_overinst *on = (slap_overinst *)c->bi;
 141         refint_data *dd = (refint_data *)on->on_bi.bi_private;
 142         refint_attrs *ip, *pip, **pipp = NULL;
 143         AttributeDescription *ad;
 144         const char *text;
 145         int rc = ARG_BAD_CONF;
 146         int i;
 147
 148         switch ( c->op ) {
 149         case SLAP_CONFIG_EMIT:
 150                 switch ( c->type ) {
 151                 case REFINT_ATTRS:
 152                         ip = dd->attrs;
 153                         while ( ip ) {
 154                                 value_add_one( &c->rvalue_vals,
 155                                                &ip->attr->ad_cname );
 156                                 ip = ip->next;
 157                         }
 158                         rc = 0;
 159                         break;
 160                 case REFINT_NOTHING:
 161                         if ( !BER_BVISEMPTY( &dd->nothing )) {
 162                                 rc = value_add_one( &c->rvalue_vals,
 163                                                     &dd->nothing );
 164                                 if ( rc ) return rc;
 165                                 rc = value_add_one( &c->rvalue_nvals,
 166                                                     &dd->nnothing );
 167                                 return rc;
 168                         }
 169                         rc = 0;
 170                         break;
 171                 case REFINT_MODIFIERSNAME:
 172                         if ( !BER_BVISEMPTY( &dd->refint_dn )) {
 173                                 rc = value_add_one( &c->rvalue_vals,
 174                                                     &dd->refint_dn );
 175                                 if ( rc ) return rc;
 176                                 rc = value_add_one( &c->rvalue_nvals,
 177                                                     &dd->refint_ndn );
 178                                 return rc;
 179                         }
 180                         rc = 0;
 181                         break;
 182                 default:
 183                         abort ();
 184                 }
 185                 break;
 186         case LDAP_MOD_DELETE:
 187                 switch ( c->type ) {
 188                 case REFINT_ATTRS:
 189                         pipp = &dd->attrs;
 190                         if ( c->valx < 0 ) {
 191                                 ip = *pipp;
 192                                 *pipp = NULL;
 193                                 while ( ip ) {
 194                                         pip = ip;
 195                                         ip = ip->next;
 196                                         ch_free ( pip );
 197                                 }
 198                         } else {
 199                                 /* delete from linked list */
 200                                 for ( i=0; i < c->valx; ++i ) {
 201                                         pipp = &(*pipp)->next;
 202                                 }
 203                                 ip = *pipp;
 204                                 *pipp = (*pipp)->next;
 205
 206                                 /* AttributeDescriptions are global so
 207                                  * shouldn't be freed here... */
 208                                 ch_free ( ip );
 209                         }
 210                         rc = 0;
 211                         break;
 212                 case REFINT_NOTHING:
 213                         if ( dd->nothing.bv_val )
 214                                 ber_memfree ( dd->nothing.bv_val );
 215                         if ( dd->nnothing.bv_val )
 216                                 ber_memfree ( dd->nnothing.bv_val );
 217                         dd->nothing.bv_len = 0;
 218                         dd->nnothing.bv_len = 0;
 219                         rc = 0;
 220                         break;
 221                 case REFINT_MODIFIERSNAME:
 222                         if ( dd->refint_dn.bv_val )
 223                                 ber_memfree ( dd->refint_dn.bv_val );
 224                         if ( dd->refint_ndn.bv_val )
 225                                 ber_memfree ( dd->refint_ndn.bv_val );
 226                         dd->refint_dn.bv_len = 0;
 227                         dd->refint_ndn.bv_len = 0;
 228                         rc = 0;
 229                         break;
 230                 default:
 231                         abort ();
 232                 }
 233                 break;
 234         case SLAP_CONFIG_ADD:
 235                 /* fallthrough to LDAP_MOD_ADD */
 236         case LDAP_MOD_ADD:
 237                 switch ( c->type ) {
 238                 case REFINT_ATTRS:
 239                         rc = 0;
 240                         for ( i=1; i < c->argc; ++i ) {
 241                                 ad = NULL;
 242                                 if ( slap_str2ad ( c->argv[i], &ad, &text )
 243                                      == LDAP_SUCCESS) {
 244                                         ip = ch_malloc (
 245                                                 sizeof ( refint_attrs ) );
 246                                         ip->attr = ad;
 247                                         ip->next = dd->attrs;
 248                                         dd->attrs = ip;
 249                                 } else {
 250                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 251                                                 "%s <%s>: %s", c->argv[0], c->argv[i], text );
 252                                         Debug ( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 253                                                 "%s: %s\n", c->log, c->cr_msg, 0 );
 254                                         rc = ARG_BAD_CONF;
 255                                 }
 256                         }
 257                         break;
 258                 case REFINT_NOTHING:
 259                         if ( dd->nothing.bv_val )
 260                                 ber_memfree ( dd->nothing.bv_val );
 261                         if ( dd->nnothing.bv_val )
 262                                 ber_memfree ( dd->nnothing.bv_val );
 263                         dd->nothing = c->value_dn;
 264                         dd->nnothing = c->value_ndn;
 265                         rc = 0;
 266                         break;
 267                 case REFINT_MODIFIERSNAME:
 268                         if ( dd->refint_dn.bv_val )
 269                                 ber_memfree ( dd->refint_dn.bv_val );
 270                         if ( dd->refint_ndn.bv_val )
 271                                 ber_memfree ( dd->refint_ndn.bv_val );
 272                         dd->refint_dn = c->value_dn;
 273                         dd->refint_ndn = c->value_ndn;
 274                         rc = 0;
 275                         break;
 276                 default:
 277                         abort ();
 278                 }
 279                 break;
 280         default:
 281                 abort ();
 282         }
 283
 284         return rc;
 285 }
 286
 287 /*
 288 ** allocate new refint_data;
 289 ** store in on_bi.bi_private;
 290 **
 291 */
 292
 293 static int
 294 refint_db_init(
 295         BackendDB       *be,
 296         ConfigReply     *cr
 297 )
 298 {
 299         slap_overinst *on = (slap_overinst *)be->bd_info;
 300         refint_data *id = ch_calloc(1,sizeof(refint_data));
 301
 302         id->message = "_init";
 303         on->on_bi.bi_private = id;
 304         ldap_pvt_thread_mutex_init( &id->qmutex );
 305         return(0);
 306 }
 307
 308 static int
 309 refint_db_destroy(
 310         BackendDB       *be,
 311         ConfigReply     *cr
 312 )
 313 {
 314         slap_overinst *on = (slap_overinst *)be->bd_info;
 315
 316         if ( on->on_bi.bi_private ) {
 317                 refint_data *id = on->on_bi.bi_private;
 318                 on->on_bi.bi_private = NULL;
 319                 ldap_pvt_thread_mutex_destroy( &id->qmutex );
 320                 ch_free( id );
 321         }
 322         return(0);
 323 }
 324
 325 /*
 326 ** initialize, copy basedn if not already set
 327 **
 328 */
 329
 330 static int
 331 refint_open(
 332         BackendDB *be,
 333         ConfigReply *cr
 334 )
 335 {
 336         slap_overinst *on       = (slap_overinst *)be->bd_info;
 337         refint_data *id = on->on_bi.bi_private;
 338         id->message             = "_open";
 339
 340         if ( BER_BVISNULL( &id->dn )) {
 341                 if ( BER_BVISNULL( &be->be_nsuffix[0] ))
 342                         return -1;
 343                 ber_dupbv( &id->dn, &be->be_nsuffix[0] );
 344         }
 345         if ( BER_BVISNULL( &id->refint_dn ) ) {
 346                 ber_dupbv( &id->refint_dn, &refint_dn );
 347                 ber_dupbv( &id->refint_ndn, &refint_ndn );
 348         }
 349         return(0);
 350 }
 351
 352
 353 /*
 354 ** foreach configured attribute:
 355 **      free it;
 356 ** free our basedn;
 357 ** (do not) free id->message;
 358 ** reset on_bi.bi_private;
 359 ** free our config data;
 360 **
 361 */
 362
 363 static int
 364 refint_close(
 365         BackendDB *be,
 366         ConfigReply *cr
 367 )
 368 {
 369         slap_overinst *on       = (slap_overinst *) be->bd_info;
 370         refint_data *id = on->on_bi.bi_private;
 371         refint_attrs *ii, *ij;
 372         id->message             = "_close";
 373
 374         for(ii = id->attrs; ii; ii = ij) {
 375                 ij = ii->next;
 376                 ch_free(ii);
 377         }
 378         id->attrs = NULL;
 379
 380         ch_free( id->dn.bv_val );
 381         BER_BVZERO( &id->dn );
 382         ch_free( id->nothing.bv_val );
 383         BER_BVZERO( &id->nothing );
 384         ch_free( id->nnothing.bv_val );
 385         BER_BVZERO( &id->nnothing );
 386         ch_free( id->refint_dn.bv_val );
 387         BER_BVZERO( &id->refint_dn );
 388         ch_free( id->refint_ndn.bv_val );
 389         BER_BVZERO( &id->refint_ndn );
 390
 391         return(0);
 392 }
 393
 394 /*
 395 ** search callback
 396 ** generates a list of Attributes from search results
 397 */
 398
 399 static int
 400 refint_search_cb(
 401         Operation *op,
 402         SlapReply *rs
 403 )
 404 {
 405         Attribute *a;
 406         BerVarray b = NULL;
 407         refint_q *rq = op->o_callback->sc_private;
 408         refint_data *dd = rq->rdata;
 409         refint_attrs *ia, *da = dd->attrs, *na;
 410         dependent_data *ip;
 411         int i;
 412
 413         Debug(LDAP_DEBUG_TRACE, "refint_search_cb <%s>\n",
 414                 rs->sr_entry ? rs->sr_entry->e_name.bv_val : "NOTHING", 0, 0);
 415
 416         if (rs->sr_type != REP_SEARCH || !rs->sr_entry) return(0);
 417
 418         /*
 419         ** foreach configured attribute type:
 420         **      if this attr exists in the search result,
 421         **      and it has a value matching the target:
 422         **              allocate an attr;
 423         **              if this is a delete and there's only one value:
 424         **                      allocate the same attr again;
 425         **
 426         */
 427
 428         ip = op->o_tmpalloc(sizeof(dependent_data), op->o_tmpmemctx );
 429         ber_dupbv_x( &ip->dn, &rs->sr_entry->e_name, op->o_tmpmemctx );
 430         ber_dupbv_x( &ip->ndn, &rs->sr_entry->e_nname, op->o_tmpmemctx );
 431         ip->next = rq->attrs;
 432         rq->attrs = ip;
 433         ip->attrs = NULL;
 434         for(ia = da; ia; ia = ia->next) {
 435                 if ( (a = attr_find(rs->sr_entry->e_attrs, ia->attr) ) ) {
 436                         int             first = -1, count = 0, deleted = 0;
 437
 438                         na = NULL;
 439
 440                         for(i = 0, b = a->a_nvals; b[i].bv_val; i++) {
 441                                 count++;
 442
 443                                 if(dnIsSuffix(&b[i], &rq->oldndn)) {
 444                                         /* first match? create structure */
 445                                         if ( na == NULL ) {
 446                                                 na = op->o_tmpcalloc( 1,
 447                                                         sizeof( refint_attrs ),
 448                                                         op->o_tmpmemctx );
 449                                                 na->next = ip->attrs;
 450                                                 ip->attrs = na;
 451                                                 na->attr = ia->attr;
 452
 453                                                 /* delete, or exact match? note it's first match */
 454                                                 if ( BER_BVISEMPTY( &rq->newdn ) &&
 455                                                         b[i].bv_len == rq->oldndn.bv_len )
 456                                                 {
 457                                                         first = i;
 458                                                 }
 459                                         }
 460
 461                                         /* if it's a rename, or a subordinate match,
 462                                          * save old and build new dn */
 463                                         if ( !BER_BVISEMPTY( &rq->newdn ) &&
 464                                                 b[i].bv_len != rq->oldndn.bv_len )
 465                                         {
 466                                                 struct berval   newsub, newdn, olddn, oldndn;
 467
 468                                                 /* if not first, save first as well */
 469                                                 if ( first != -1 ) {
 470
 471                                                         ber_dupbv_x( &olddn, &a->a_vals[first], op->o_tmpmemctx );
 472                                                         ber_bvarray_add_x( &na->old_vals, &olddn, op->o_tmpmemctx );
 473                                                         ber_dupbv_x( &oldndn, &a->a_nvals[first], op->o_tmpmemctx );
 474                                                         ber_bvarray_add_x( &na->old_nvals, &oldndn, op->o_tmpmemctx );
 475                                                         na->ra_numvals++;
 476
 477                                                         newsub = a->a_vals[first];
 478                                                         newsub.bv_len -= rq->olddn.bv_len + 1;
 479
 480                                                         build_new_dn( &newdn, &rq->newdn, &newsub, op->o_tmpmemctx );
 481
 482                                                         ber_bvarray_add_x( &na->new_vals, &newdn, op->o_tmpmemctx );
 483
 484                                                         newsub = a->a_nvals[first];
 485                                                         newsub.bv_len -= rq->oldndn.bv_len + 1;
 486
 487                                                         build_new_dn( &newdn, &rq->newndn, &newsub, op->o_tmpmemctx );
 488
 489                                                         ber_bvarray_add_x( &na->new_nvals, &newdn, op->o_tmpmemctx );
 490
 491                                                         first = -1;
 492                                                 }
 493
 494                                                 ber_dupbv_x( &olddn, &a->a_vals[i], op->o_tmpmemctx );
 495                                                 ber_bvarray_add_x( &na->old_vals, &olddn, op->o_tmpmemctx );
 496                                                 ber_dupbv_x( &oldndn, &a->a_nvals[i], op->o_tmpmemctx );
 497                                                 ber_bvarray_add_x( &na->old_nvals, &oldndn, op->o_tmpmemctx );
 498                                                 na->ra_numvals++;
 499
 500                                                 newsub = a->a_vals[i];
 501                                                 newsub.bv_len -= rq->olddn.bv_len + 1;
 502
 503                                                 build_new_dn( &newdn, &rq->newdn, &newsub, op->o_tmpmemctx );
 504
 505                                                 ber_bvarray_add_x( &na->new_vals, &newdn, op->o_tmpmemctx );
 506
 507                                                 newsub = a->a_nvals[i];
 508                                                 newsub.bv_len -= rq->oldndn.bv_len + 1;
 509
 510                                                 build_new_dn( &newdn, &rq->newndn, &newsub, op->o_tmpmemctx );
 511
 512                                                 ber_bvarray_add_x( &na->new_nvals, &newdn, op->o_tmpmemctx );
 513                                         }
 514
 515                                         /* count deletes */
 516                                         if ( BER_BVISEMPTY( &rq->newdn ) ) {
 517                                                 deleted++;
 518                                         }
 519                                 }
 520
 521                                 /* If this is a delete and no value would be left, and
 522                                  * we have a nothing DN configured, allocate the attr again.
 523                                  */
 524                                 if ( count == deleted && !BER_BVISNULL(&dd->nothing) )
 525                                 {
 526                                         na = op->o_tmpcalloc( 1,
 527                                                 sizeof( refint_attrs ),
 528                                                 op->o_tmpmemctx );
 529                                         na->next = ip->attrs;
 530                                         ip->attrs = na;
 531                                         na->attr = ia->attr;
 532                                 }
 533
 534                                 Debug( LDAP_DEBUG_TRACE, "refint_search_cb: %s: %s (#%d)\n",
 535                                         a->a_desc->ad_cname.bv_val, rq->olddn.bv_val, count );
 536                         }
 537                 }
 538         }
 539
 540         return(0);
 541 }
 542
 543 static int
 544 refint_repair(
 545         Operation       *op,
 546         SlapReply       *rs,
 547         refint_data     *id,
 548         refint_q        *rq )
 549 {
 550         dependent_data  *dp, *dp_next;
 551         int             rc;
 552
 553         op->o_callback->sc_response = refint_search_cb;
 554         op->o_req_dn = op->o_bd->be_suffix[ 0 ];
 555         op->o_req_ndn = op->o_bd->be_nsuffix[ 0 ];
 556         op->o_dn = op->o_bd->be_rootdn;
 557         op->o_ndn = op->o_bd->be_rootndn;
 558
 559         /* search */
 560         rc = op->o_bd->be_search( op, rs );
 561
 562         if ( rc != LDAP_SUCCESS ) {
 563                 Debug( LDAP_DEBUG_TRACE,
 564                         "refint_repair: search failed: %d\n",
 565                         rc, 0, 0 );
 566                 return 0;
 567         }
 568
 569         /* safety? paranoid just in case */
 570         if ( op->o_callback->sc_private == NULL ) {
 571                 Debug( LDAP_DEBUG_TRACE,
 572                         "refint_repair: callback wiped out sc_private?!\n",
 573                         0, 0, 0 );
 574                 return 0;
 575         }
 576
 577         /* Set up the Modify requests */
 578         op->o_callback->sc_response = &slap_null_cb;
 579
 580         /*
 581          * [our search callback builds a list of attrs]
 582          * foreach attr:
 583          *      make sure its dn has a backend;
 584          *      build Modification* chain;
 585          *      call the backend modify function;
 586          *
 587          */
 588
 589         for ( dp = rq->attrs; dp; dp = dp_next ) {
 590                 Operation       op2 = *op;
 591                 SlapReply       rs2 = { 0 };
 592                 refint_attrs    *ra;
 593                 Modifications   *m, *first = NULL;
 594
 595                 dp_next = dp->next;
 596
 597                 op2.o_tag = LDAP_REQ_MODIFY;
 598                 op2.orm_modlist = NULL;
 599                 op2.o_req_dn    = dp->dn;
 600                 op2.o_req_ndn   = dp->ndn;
 601                 op2.o_bd = select_backend( &dp->ndn, 1 );
 602                 if ( !op2.o_bd ) {
 603                         Debug( LDAP_DEBUG_TRACE,
 604                                 "refint_repair: no backend for DN %s!\n",
 605                                 dp->dn.bv_val, 0, 0 );
 606                         return 0;
 607                 }
 608
 609                 rs2.sr_type = REP_RESULT;
 610                 for ( ra = dp->attrs; ra; ra = dp->attrs ) {
 611                         size_t  len;
 612
 613                         dp->attrs = ra->next;
 614                         /* Set our ModifiersName */
 615                         if ( SLAP_LASTMOD( op->o_bd ) ) {
 616                                 m = op2.o_tmpalloc( sizeof(Modifications) +
 617                                         4*sizeof(BerValue), op2.o_tmpmemctx );
 618                                 m->sml_next = op2.orm_modlist;
 619                                 if ( !first )
 620                                         first = m;
 621                                 op2.orm_modlist = m;
 622                                 m->sml_op = LDAP_MOD_REPLACE;
 623                                 m->sml_flags = SLAP_MOD_INTERNAL;
 624                                 m->sml_desc = slap_schema.si_ad_modifiersName;
 625                                 m->sml_type = m->sml_desc->ad_cname;
 626                                 m->sml_numvals = 1;
 627                                 m->sml_values = (BerVarray)(m+1);
 628                                 m->sml_nvalues = m->sml_values+2;
 629                                 BER_BVZERO( &m->sml_values[1] );
 630                                 BER_BVZERO( &m->sml_nvalues[1] );
 631                                 m->sml_values[0] = id->refint_dn;
 632                                 m->sml_nvalues[0] = id->refint_ndn;
 633                         }
 634                         if ( !BER_BVISEMPTY( &rq->newdn ) || ( ra->next &&
 635                                 ra->attr == ra->next->attr ) )
 636                         {
 637                                 len = sizeof(Modifications);
 638
 639                                 if ( ra->new_vals == NULL ) {
 640                                         len += 4*sizeof(BerValue);
 641                                 }
 642
 643                                 m = op2.o_tmpalloc( len, op2.o_tmpmemctx );
 644                                 m->sml_next = op2.orm_modlist;
 645                                 if ( !first )
 646                                         first = m;
 647                                 op2.orm_modlist = m;
 648                                 m->sml_op = LDAP_MOD_ADD;
 649                                 m->sml_flags = 0;
 650                                 m->sml_desc = ra->attr;
 651                                 m->sml_type = ra->attr->ad_cname;
 652                                 if ( ra->new_vals == NULL ) {
 653                                         m->sml_values = (BerVarray)(m+1);
 654                                         m->sml_nvalues = m->sml_values+2;
 655                                         BER_BVZERO( &m->sml_values[1] );
 656                                         BER_BVZERO( &m->sml_nvalues[1] );
 657                                         m->sml_numvals = 1;
 658                                         if ( BER_BVISEMPTY( &rq->newdn ) ) {
 659                                                 op2.o_tmpfree( ra, op2.o_tmpmemctx );
 660                                                 ra = dp->attrs;
 661                                                 dp->attrs = ra->next;
 662                                                 m->sml_values[0] = id->nothing;
 663                                                 m->sml_nvalues[0] = id->nnothing;
 664                                         } else {
 665                                                 m->sml_values[0] = rq->newdn;
 666                                                 m->sml_nvalues[0] = rq->newndn;
 667                                         }
 668                                 } else {
 669                                         m->sml_values = ra->new_vals;
 670                                         m->sml_nvalues = ra->new_nvals;
 671                                         m->sml_numvals = ra->ra_numvals;
 672                                 }
 673                         }
 674
 675                         len = sizeof(Modifications);
 676                         if ( ra->old_vals == NULL ) {
 677                                 len += 4*sizeof(BerValue);
 678                         }
 679
 680                         m = op2.o_tmpalloc( len, op2.o_tmpmemctx );
 681                         m->sml_next = op2.orm_modlist;
 682                         op2.orm_modlist = m;
 683                         if ( !first )
 684                                 first = m;
 685                         m->sml_op = LDAP_MOD_DELETE;
 686                         m->sml_flags = 0;
 687                         m->sml_desc = ra->attr;
 688                         m->sml_type = ra->attr->ad_cname;
 689                         if ( ra->old_vals == NULL ) {
 690                                 m->sml_numvals = 1;
 691                                 m->sml_values = (BerVarray)(m+1);
 692                                 m->sml_nvalues = m->sml_values+2;
 693                                 m->sml_values[0] = rq->olddn;
 694                                 m->sml_nvalues[0] = rq->oldndn;
 695                                 BER_BVZERO( &m->sml_values[1] );
 696                                 BER_BVZERO( &m->sml_nvalues[1] );
 697                         } else {
 698                                 m->sml_values = ra->old_vals;
 699                                 m->sml_nvalues = ra->old_nvals;
 700                                 m->sml_numvals = ra->ra_numvals;
 701                         }
 702                         op2.o_tmpfree( ra, op2.o_tmpmemctx );
 703                 }
 704
 705                 op2.o_dn = op2.o_bd->be_rootdn;
 706                 op2.o_ndn = op2.o_bd->be_rootndn;
 707                 slap_op_time( &op2.o_time, &op2.o_tincr );
 708                 if ( ( rc = op2.o_bd->be_modify( &op2, &rs2 ) ) != LDAP_SUCCESS ) {
 709                         Debug( LDAP_DEBUG_TRACE,
 710                                 "refint_repair: dependent modify failed: %d\n",
 711                                 rs2.sr_err, 0, 0 );
 712                 }
 713
 714                 while ( ( m = op2.orm_modlist ) ) {
 715                         op2.orm_modlist = m->sml_next;
 716                         if ( m->sml_values && m->sml_values != (BerVarray)(m+1) ) {
 717                                 ber_bvarray_free_x( m->sml_values, op2.o_tmpmemctx );
 718                                 ber_bvarray_free_x( m->sml_nvalues, op2.o_tmpmemctx );
 719                         }
 720                         op2.o_tmpfree( m, op2.o_tmpmemctx );
 721                         if ( m == first ) break;
 722                 }
 723                 slap_mods_free( op2.orm_modlist, 1 );
 724                 op2.o_tmpfree( dp->ndn.bv_val, op2.o_tmpmemctx );
 725                 op2.o_tmpfree( dp->dn.bv_val, op2.o_tmpmemctx );
 726                 op2.o_tmpfree( dp, op2.o_tmpmemctx );
 727         }
 728
 729         return 0;
 730 }
 731
 732 static void *
 733 refint_qtask( void *ctx, void *arg )
 734 {
 735         struct re_s *rtask = arg;
 736         refint_data *id = rtask->arg;
 737         Connection conn = {0};
 738         OperationBuffer opbuf;
 739         Operation *op;
 740         SlapReply rs = {REP_RESULT};
 741         slap_callback cb = { NULL, NULL, NULL, NULL };
 742         Filter ftop, *fptr;
 743         refint_q *rq;
 744         refint_attrs *ip;
 745
 746         connection_fake_init( &conn, &opbuf, ctx );
 747         op = &opbuf.ob_op;
 748
 749         /*
 750         ** build a search filter for all configured attributes;
 751         ** populate our Operation;
 752         ** pass our data (attr list, dn) to backend via sc_private;
 753         ** call the backend search function;
 754         ** nb: (|(one=thing)) is valid, but do smart formatting anyway;
 755         ** nb: 16 is arbitrarily a dozen or so extra bytes;
 756         **
 757         */
 758
 759         ftop.f_choice = LDAP_FILTER_OR;
 760         ftop.f_next = NULL;
 761         ftop.f_or = NULL;
 762         op->ors_filter = &ftop;
 763         for(ip = id->attrs; ip; ip = ip->next) {
 764                 fptr = op->o_tmpcalloc( sizeof(Filter) + sizeof(MatchingRuleAssertion),
 765                         1, op->o_tmpmemctx );
 766                 /* Use (attr:dnSubtreeMatch:=value) to catch subtree rename
 767                  * and subtree delete where supported */
 768                 fptr->f_choice = LDAP_FILTER_EXT;
 769                 fptr->f_mra = (MatchingRuleAssertion *)(fptr+1);
 770                 fptr->f_mr_rule = mr_dnSubtreeMatch;
 771                 fptr->f_mr_rule_text = mr_dnSubtreeMatch->smr_bvoid;
 772                 fptr->f_mr_desc = ip->attr;
 773                 fptr->f_mr_dnattrs = 0;
 774                 fptr->f_next = ftop.f_or;
 775                 ftop.f_or = fptr;
 776         }
 777
 778         for (;;) {
 779                 /* Dequeue an op */
 780                 ldap_pvt_thread_mutex_lock( &id->qmutex );
 781                 rq = id->qhead;
 782                 if ( rq ) {
 783                         id->qhead = rq->next;
 784                         if ( !id->qhead )
 785                                 id->qtail = NULL;
 786                 }
 787                 ldap_pvt_thread_mutex_unlock( &id->qmutex );
 788                 if ( !rq )
 789                         break;
 790
 791                 for (fptr = ftop.f_or; fptr; fptr = fptr->f_next )
 792                         fptr->f_mr_value = rq->oldndn;
 793
 794                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 795
 796                 /* callback gets the searched dn instead */
 797                 cb.sc_private   = rq;
 798                 cb.sc_response  = refint_search_cb;
 799                 op->o_callback  = &cb;
 800                 op->o_tag       = LDAP_REQ_SEARCH;
 801                 op->ors_scope   = LDAP_SCOPE_SUBTREE;
 802                 op->ors_deref   = LDAP_DEREF_NEVER;
 803                 op->ors_limit   = NULL;
 804                 op->ors_slimit  = SLAP_NO_LIMIT;
 805                 op->ors_tlimit  = SLAP_NO_LIMIT;
 806
 807                 /* no attrs! */
 808                 op->ors_attrs = slap_anlist_no_attrs;
 809
 810                 slap_op_time( &op->o_time, &op->o_tincr );
 811
 812                 if ( rq->db != NULL ) {
 813                         op->o_bd = rq->db;
 814                         refint_repair( op, &rs, id, rq );
 815
 816                 } else {
 817                         BackendDB       *be;
 818
 819                         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 820                                 /* we may want to skip cn=config */
 821                                 if ( be == LDAP_STAILQ_FIRST(&backendDB) ) {
 822                                         continue;
 823                                 }
 824
 825                                 if ( be->be_search && be->be_modify ) {
 826                                         op->o_bd = be;
 827                                         refint_repair( op, &rs, id, rq );
 828                                 }
 829                         }
 830                 }
 831
 832                 if ( !BER_BVISNULL( &rq->newndn )) {
 833                         ch_free( rq->newndn.bv_val );
 834                         ch_free( rq->newdn.bv_val );
 835                 }
 836                 ch_free( rq->oldndn.bv_val );
 837                 ch_free( rq->olddn.bv_val );
 838                 ch_free( rq );
 839         }
 840
 841         /* free filter */
 842         for ( fptr = ftop.f_or; fptr; ) {
 843                 Filter *f_next = fptr->f_next;
 844                 op->o_tmpfree( fptr, op->o_tmpmemctx );
 845                 fptr = f_next;
 846         }
 847
 848         /* wait until we get explicitly scheduled again */
 849         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 850         ldap_pvt_runqueue_stoptask( &slapd_rq, id->qtask );
 851         ldap_pvt_runqueue_resched( &slapd_rq,id->qtask, 1 );
 852         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 853
 854         return NULL;
 855 }
 856
 857 /*
 858 ** refint_response
 859 ** search for matching records and modify them
 860 */
 861
 862 static int
 863 refint_response(
 864         Operation *op,
 865         SlapReply *rs
 866 )
 867 {
 868         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 869         refint_data *id = on->on_bi.bi_private;
 870         BerValue pdn;
 871         int ac;
 872         refint_q *rq;
 873         BackendDB *db = NULL;
 874         refint_attrs *ip;
 875
 876         id->message = "_refint_response";
 877
 878         /* If the main op failed or is not a Delete or ModRdn, ignore it */
 879         if (( op->o_tag != LDAP_REQ_DELETE && op->o_tag != LDAP_REQ_MODRDN ) ||
 880                 rs->sr_err != LDAP_SUCCESS )
 881                 return SLAP_CB_CONTINUE;
 882
 883         /*
 884         ** validate (and count) the list of attrs;
 885         **
 886         */
 887
 888         for(ip = id->attrs, ac = 0; ip; ip = ip->next, ac++);
 889         if(!ac) {
 890                 Debug( LDAP_DEBUG_TRACE,
 891                         "refint_response called without any attributes\n", 0, 0, 0 );
 892                 return SLAP_CB_CONTINUE;
 893         }
 894
 895         /*
 896         ** find the backend that matches our configured basedn;
 897         ** make sure it exists and has search and modify methods;
 898         **
 899         */
 900
 901         if ( on->on_info->oi_origdb != frontendDB ) {
 902                 db = select_backend(&id->dn, 1);
 903
 904                 if ( db ) {
 905                         if ( !db->be_search || !db->be_modify ) {
 906                                 Debug( LDAP_DEBUG_TRACE,
 907                                         "refint_response: backend missing search and/or modify\n",
 908                                         0, 0, 0 );
 909                                 return SLAP_CB_CONTINUE;
 910                         }
 911                 } else {
 912                         Debug( LDAP_DEBUG_TRACE,
 913                                 "refint_response: no backend for our baseDN %s??\n",
 914                                 id->dn.bv_val, 0, 0 );
 915                         return SLAP_CB_CONTINUE;
 916                 }
 917         }
 918
 919         rq = ch_calloc( 1, sizeof( refint_q ));
 920         ber_dupbv( &rq->olddn, &op->o_req_dn );
 921         ber_dupbv( &rq->oldndn, &op->o_req_ndn );
 922         rq->db = db;
 923         rq->rdata = id;
 924
 925         if ( op->o_tag == LDAP_REQ_MODRDN ) {
 926                 if ( op->oq_modrdn.rs_newSup ) {
 927                         pdn = *op->oq_modrdn.rs_newSup;
 928                 } else {
 929                         dnParent( &op->o_req_dn, &pdn );
 930                 }
 931                 build_new_dn( &rq->newdn, &pdn, &op->orr_newrdn, NULL );
 932                 if ( op->oq_modrdn.rs_nnewSup ) {
 933                         pdn = *op->oq_modrdn.rs_nnewSup;
 934                 } else {
 935                         dnParent( &op->o_req_ndn, &pdn );
 936                 }
 937                 build_new_dn( &rq->newndn, &pdn, &op->orr_nnewrdn, NULL );
 938         }
 939
 940         ldap_pvt_thread_mutex_lock( &id->qmutex );
 941         if ( id->qtail ) {
 942                 id->qtail->next = rq;
 943         } else {
 944                 id->qhead = rq;
 945         }
 946         id->qtail = rq;
 947         ldap_pvt_thread_mutex_unlock( &id->qmutex );
 948
 949         ac = 0;
 950         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 951         if ( !id->qtask ) {
 952                 id->qtask = ldap_pvt_runqueue_insert( &slapd_rq, RUNQ_INTERVAL,
 953                         refint_qtask, id, "refint_qtask",
 954                         op->o_bd->be_suffix[0].bv_val );
 955                 ac = 1;
 956         } else {
 957                 if ( !ldap_pvt_runqueue_isrunning( &slapd_rq, id->qtask ) &&
 958                         !id->qtask->next_sched.tv_sec ) {
 959                         id->qtask->interval.tv_sec = 0;
 960                         ldap_pvt_runqueue_resched( &slapd_rq, id->qtask, 0 );
 961                         id->qtask->interval.tv_sec = RUNQ_INTERVAL;
 962                         ac = 1;
 963                 }
 964         }
 965         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 966         if ( ac )
 967                 slap_wake_listener();
 968
 969         return SLAP_CB_CONTINUE;
 970 }
 971
 972 /*
 973 ** init_module is last so the symbols resolve "for free" --
 974 ** it expects to be called automagically during dynamic module initialization
 975 */
 976
 977 int refint_initialize() {
 978         int rc;
 979
 980         mr_dnSubtreeMatch = mr_find( "dnSubtreeMatch" );
 981         if ( mr_dnSubtreeMatch == NULL ) {
 982                 Debug( LDAP_DEBUG_ANY, "refint_initialize: "
 983                         "unable to find MatchingRule 'dnSubtreeMatch'.\n",
 984                         0, 0, 0 );
 985                 return 1;
 986         }
 987
 988         /* statically declared just after the #includes at top */
 989         refint.on_bi.bi_type = "refint";
 990         refint.on_bi.bi_db_init = refint_db_init;
 991         refint.on_bi.bi_db_destroy = refint_db_destroy;
 992         refint.on_bi.bi_db_open = refint_open;
 993         refint.on_bi.bi_db_close = refint_close;
 994         refint.on_response = refint_response;
 995
 996         refint.on_bi.bi_cf_ocs = refintocs;
 997         rc = config_register_schema ( refintcfg, refintocs );
 998         if ( rc ) return rc;
 999
1000         return(overlay_register(&refint));
1001 }
1002
1003 #if SLAPD_OVER_REFINT == SLAPD_MOD_DYNAMIC && defined(PIC)
1004 int init_module(int argc, char *argv[]) {
1005         return refint_initialize();
1006 }
1007 #endif
1008
1009 #endif /* SLAPD_OVER_REFINT */