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 2004-2007 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 } refint_attrs;
  54
  55 typedef struct dependents_s {
  56         struct dependents_s *next;
  57         BerValue dn;                            /* target dn */
  58         BerValue ndn;
  59         refint_attrs *attrs;
  60 } dependent_data;
  61
  62 typedef struct refint_q {
  63         struct refint_q *next;
  64         struct refint_data_s *rdata;
  65         dependent_data *attrs;          /* entries and attrs returned from callback */
  66         BackendDB *db;
  67         BerValue olddn;
  68         BerValue oldndn;
  69         BerValue newdn;
  70         BerValue newndn;
  71 } refint_q;
  72
  73 typedef struct refint_data_s {
  74         const char *message;                    /* breadcrumbs */
  75         struct refint_attrs_s *attrs;   /* list of known attrs */
  76         BerValue dn;                            /* basedn in parent, */
  77         BerValue nothing;                       /* the nothing value, if needed */
  78         BerValue nnothing;                      /* normalized nothingness */
  79         struct re_s *qtask;
  80         refint_q *qhead;
  81         refint_q *qtail;
  82         ldap_pvt_thread_mutex_t qmutex;
  83 } refint_data;
  84
  85 #define RUNQ_INTERVAL   36000   /* a long time */
  86
  87 enum {
  88         REFINT_ATTRS = 1,
  89         REFINT_NOTHING
  90 };
  91
  92 static ConfigDriver refint_cf_gen;
  93
  94 static ConfigTable refintcfg[] = {
  95         { "refint_attributes", "attribute...", 2, 0, 0,
  96           ARG_MAGIC|REFINT_ATTRS, refint_cf_gen,
  97           "( OLcfgOvAt:11.1 NAME 'olcRefintAttribute' "
  98           "DESC 'Attributes for referential integrity' "
  99           "EQUALITY caseIgnoreMatch "
 100           "SYNTAX OMsDirectoryString )", NULL, NULL },
 101         { "refint_nothing", "string", 2, 2, 0,
 102           ARG_DN|ARG_MAGIC|REFINT_NOTHING, refint_cf_gen,
 103           "( OLcfgOvAt:11.2 NAME 'olcRefintNothing' "
 104           "DESC 'Replacement DN to supply when needed' "
 105           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 106         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 107 };
 108
 109 static ConfigOCs refintocs[] = {
 110         { "( OLcfgOvOc:11.1 "
 111           "NAME 'olcRefintConfig' "
 112           "DESC 'Referential integrity configuration' "
 113           "SUP olcOverlayConfig "
 114           "MAY ( olcRefintAttribute $ olcRefintNothing ) )",
 115           Cft_Overlay, refintcfg },
 116         { NULL, 0, NULL }
 117 };
 118
 119 static int
 120 refint_cf_gen(ConfigArgs *c)
 121 {
 122         slap_overinst *on = (slap_overinst *)c->bi;
 123         refint_data *dd = (refint_data *)on->on_bi.bi_private;
 124         refint_attrs *ip, *pip, **pipp = NULL;
 125         AttributeDescription *ad;
 126         const char *text;
 127         int rc = ARG_BAD_CONF;
 128         int i;
 129
 130         switch ( c->op ) {
 131         case SLAP_CONFIG_EMIT:
 132                 switch ( c->type ) {
 133                 case REFINT_ATTRS:
 134                         ip = dd->attrs;
 135                         while ( ip ) {
 136                                 value_add_one( &c->rvalue_vals,
 137                                                &ip->attr->ad_cname );
 138                                 ip = ip->next;
 139                         }
 140                         rc = 0;
 141                         break;
 142                 case REFINT_NOTHING:
 143                         if ( !BER_BVISEMPTY( &dd->nothing )) {
 144                                 rc = value_add_one( &c->rvalue_vals,
 145                                                     &dd->nothing );
 146                                 if ( rc ) return rc;
 147                                 rc = value_add_one( &c->rvalue_nvals,
 148                                                     &dd->nnothing );
 149                                 return rc;
 150                         }
 151                         rc = 0;
 152                         break;
 153                 default:
 154                         abort ();
 155                 }
 156                 break;
 157         case LDAP_MOD_DELETE:
 158                 switch ( c->type ) {
 159                 case REFINT_ATTRS:
 160                         pipp = &dd->attrs;
 161                         if ( c->valx < 0 ) {
 162                                 ip = *pipp;
 163                                 *pipp = NULL;
 164                                 while ( ip ) {
 165                                         pip = ip;
 166                                         ip = ip->next;
 167                                         ch_free ( pip );
 168                                 }
 169                         } else {
 170                                 /* delete from linked list */
 171                                 for ( i=0; i < c->valx; ++i ) {
 172                                         pipp = &(*pipp)->next;
 173                                 }
 174                                 ip = *pipp;
 175                                 *pipp = (*pipp)->next;
 176
 177                                 /* AttributeDescriptions are global so
 178                                  * shouldn't be freed here... */
 179                                 ch_free ( ip );
 180                         }
 181                         rc = 0;
 182                         break;
 183                 case REFINT_NOTHING:
 184                         if ( dd->nothing.bv_val )
 185                                 ber_memfree ( dd->nothing.bv_val );
 186                         if ( dd->nnothing.bv_val )
 187                                 ber_memfree ( dd->nnothing.bv_val );
 188                         dd->nothing.bv_len = 0;
 189                         dd->nnothing.bv_len = 0;
 190                         rc = 0;
 191                         break;
 192                 default:
 193                         abort ();
 194                 }
 195                 break;
 196         case SLAP_CONFIG_ADD:
 197                 /* fallthrough to LDAP_MOD_ADD */
 198         case LDAP_MOD_ADD:
 199                 switch ( c->type ) {
 200                 case REFINT_ATTRS:
 201                         rc = 0;
 202                         for ( i=1; i < c->argc; ++i ) {
 203                                 ad = NULL;
 204                                 if ( slap_str2ad ( c->argv[i], &ad, &text )
 205                                      == LDAP_SUCCESS) {
 206                                         ip = ch_malloc (
 207                                                 sizeof ( refint_attrs ) );
 208                                         ip->attr = ad;
 209                                         ip->next = dd->attrs;
 210                                         dd->attrs = ip;
 211                                 } else {
 212                                         snprintf( c->msg, sizeof( c->msg ),
 213                                                 "%s <%s>: %s", c->argv[0], c->argv[i], text );
 214                                         Debug ( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 215                                                 "%s: %s\n", c->log, c->msg, 0 );
 216                                         rc = ARG_BAD_CONF;
 217                                 }
 218                         }
 219                         break;
 220                 case REFINT_NOTHING:
 221                         if ( dd->nothing.bv_val )
 222                                 ber_memfree ( dd->nothing.bv_val );
 223                         if ( dd->nnothing.bv_val )
 224                                 ber_memfree ( dd->nnothing.bv_val );
 225                         dd->nothing = c->value_dn;
 226                         dd->nnothing = c->value_ndn;
 227                         rc = 0;
 228                         break;
 229                 default:
 230                         abort ();
 231                 }
 232                 break;
 233         default:
 234                 abort ();
 235         }
 236
 237         return rc;
 238 }
 239
 240 /*
 241 ** allocate new refint_data;
 242 ** store in on_bi.bi_private;
 243 **
 244 */
 245
 246 static int
 247 refint_db_init(
 248         BackendDB       *be
 249 )
 250 {
 251         slap_overinst *on = (slap_overinst *)be->bd_info;
 252         refint_data *id = ch_calloc(1,sizeof(refint_data));
 253
 254         id->message = "_init";
 255         on->on_bi.bi_private = id;
 256         ldap_pvt_thread_mutex_init( &id->qmutex );
 257         return(0);
 258 }
 259
 260 static int
 261 refint_db_destroy(
 262         BackendDB       *be
 263 )
 264 {
 265         slap_overinst *on = (slap_overinst *)be->bd_info;
 266
 267         if ( on->on_bi.bi_private ) {
 268                 refint_data *id = on->on_bi.bi_private;
 269                 on->on_bi.bi_private = NULL;
 270                 ldap_pvt_thread_mutex_destroy( &id->qmutex );
 271                 ch_free( id );
 272         }
 273         return(0);
 274 }
 275
 276 /*
 277 ** initialize, copy basedn if not already set
 278 **
 279 */
 280
 281 static int
 282 refint_open(
 283         BackendDB *be
 284 )
 285 {
 286         slap_overinst *on       = (slap_overinst *)be->bd_info;
 287         refint_data *id = on->on_bi.bi_private;
 288         id->message             = "_open";
 289
 290         if ( BER_BVISNULL( &id->dn )) {
 291                 if ( BER_BVISNULL( &be->be_nsuffix[0] ))
 292                         return -1;
 293                 ber_dupbv( &id->dn, &be->be_nsuffix[0] );
 294         }
 295         return(0);
 296 }
 297
 298
 299 /*
 300 ** foreach configured attribute:
 301 **      free it;
 302 ** free our basedn;
 303 ** (do not) free id->message;
 304 ** reset on_bi.bi_private;
 305 ** free our config data;
 306 **
 307 */
 308
 309 static int
 310 refint_close(
 311         BackendDB *be
 312 )
 313 {
 314         slap_overinst *on       = (slap_overinst *) be->bd_info;
 315         refint_data *id = on->on_bi.bi_private;
 316         refint_attrs *ii, *ij;
 317         id->message             = "_close";
 318
 319         for(ii = id->attrs; ii; ii = ij) {
 320                 ij = ii->next;
 321                 ch_free(ii);
 322         }
 323
 324         ch_free(id->dn.bv_val);
 325         ch_free(id->nothing.bv_val);
 326         ch_free(id->nnothing.bv_val);
 327
 328         memset( id, 0, sizeof(*id));
 329
 330         return(0);
 331 }
 332
 333 /*
 334 ** search callback
 335 ** generates a list of Attributes from search results
 336 */
 337
 338 static int
 339 refint_search_cb(
 340         Operation *op,
 341         SlapReply *rs
 342 )
 343 {
 344         Attribute *a;
 345         BerVarray b = NULL;
 346         refint_q *rq = op->o_callback->sc_private;
 347         refint_data *dd = rq->rdata;
 348         refint_attrs *ia, *da = dd->attrs, *na;
 349         dependent_data *ip;
 350         int i;
 351
 352         Debug(LDAP_DEBUG_TRACE, "refint_search_cb <%s>\n",
 353                 rs->sr_entry ? rs->sr_entry->e_name.bv_val : "NOTHING", 0, 0);
 354
 355         if (rs->sr_type != REP_SEARCH || !rs->sr_entry) return(0);
 356
 357         /*
 358         ** foreach configured attribute type:
 359         **      if this attr exists in the search result,
 360         **      and it has a value matching the target:
 361         **              allocate an attr;
 362         **              if this is a delete and there's only one value:
 363         **                      allocate the same attr again;
 364         **
 365         */
 366
 367         ip = op->o_tmpalloc(sizeof(dependent_data), op->o_tmpmemctx );
 368         ber_dupbv_x( &ip->dn, &rs->sr_entry->e_name, op->o_tmpmemctx );
 369         ber_dupbv_x( &ip->ndn, &rs->sr_entry->e_nname, op->o_tmpmemctx );
 370         ip->next = rq->attrs;
 371         rq->attrs = ip;
 372         ip->attrs = NULL;
 373         for(ia = da; ia; ia = ia->next) {
 374             if ( (a = attr_find(rs->sr_entry->e_attrs, ia->attr) ) )
 375                 for(i = 0, b = a->a_nvals; b[i].bv_val; i++)
 376                     if(bvmatch(&rq->oldndn, &b[i])) {
 377                         na = op->o_tmpalloc(sizeof( refint_attrs ), op->o_tmpmemctx );
 378                         na->next = ip->attrs;
 379                         ip->attrs = na;
 380                         na->attr = ia->attr;
 381                         /* If this is a delete and there's only one value, and
 382                          * we have a nothing DN configured, allocate the attr again.
 383                          */
 384                         if(!b[1].bv_val && BER_BVISEMPTY( &rq->newdn ) &&
 385                                 dd->nothing.bv_val) {
 386                                 na = op->o_tmpalloc(sizeof( refint_attrs ), op->o_tmpmemctx );
 387                                 na->next = ip->attrs;
 388                                 ip->attrs = na;
 389                                 na->attr = ia->attr;
 390                         }
 391                         Debug(LDAP_DEBUG_TRACE, "refint_search_cb: %s: %s\n",
 392                                 a->a_desc->ad_cname.bv_val, rq->olddn.bv_val, 0);
 393                         break;
 394             }
 395         }
 396         return(0);
 397 }
 398
 399 static void *
 400 refint_qtask( void *ctx, void *arg )
 401 {
 402         struct re_s *rtask = arg;
 403         refint_data *id = rtask->arg;
 404         Connection conn = {0};
 405         OperationBuffer opbuf;
 406         Operation *op;
 407         SlapReply rs = {REP_RESULT};
 408         slap_callback cb = { NULL, NULL, NULL, NULL };
 409         Filter ftop, *fptr;
 410         refint_q *rq;
 411         dependent_data *dp;
 412         refint_attrs *ra, *ip;
 413         int rc;
 414
 415         op = (Operation *) &opbuf;
 416         connection_fake_init( &conn, op, ctx );
 417
 418         /*
 419         ** build a search filter for all configured attributes;
 420         ** populate our Operation;
 421         ** pass our data (attr list, dn) to backend via sc_private;
 422         ** call the backend search function;
 423         ** nb: (|(one=thing)) is valid, but do smart formatting anyway;
 424         ** nb: 16 is arbitrarily a dozen or so extra bytes;
 425         **
 426         */
 427
 428         ftop.f_choice = LDAP_FILTER_OR;
 429         ftop.f_next = NULL;
 430         ftop.f_or = NULL;
 431         op->ors_filter = &ftop;
 432         for(ip = id->attrs; ip; ip = ip->next) {
 433                 fptr = op->o_tmpalloc( sizeof(Filter) + sizeof(AttributeAssertion),
 434                         op->o_tmpmemctx );
 435                 fptr->f_choice = LDAP_FILTER_EQUALITY;
 436                 fptr->f_ava = (AttributeAssertion *)(fptr+1);
 437                 fptr->f_ava->aa_desc = ip->attr;
 438                 fptr->f_next = ftop.f_or;
 439                 ftop.f_or = fptr;
 440         }
 441
 442         for (;;) {
 443                 /* Dequeue an op */
 444                 ldap_pvt_thread_mutex_lock( &id->qmutex );
 445                 rq = id->qhead;
 446                 if ( rq ) {
 447                         id->qhead = rq->next;
 448                         if ( !id->qhead )
 449                                 id->qtail = NULL;
 450                 }
 451                 ldap_pvt_thread_mutex_unlock( &id->qmutex );
 452                 if ( !rq )
 453                         break;
 454
 455                 for (fptr = ftop.f_or; fptr; fptr=fptr->f_next )
 456                         fptr->f_av_value = rq->oldndn;
 457
 458                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 459
 460                 /* callback gets the searched dn instead */
 461                 cb.sc_private   = rq;
 462                 cb.sc_response  = refint_search_cb;
 463                 op->o_callback  = &cb;
 464                 op->o_tag       = LDAP_REQ_SEARCH;
 465                 op->ors_scope   = LDAP_SCOPE_SUBTREE;
 466                 op->ors_deref   = LDAP_DEREF_NEVER;
 467                 op->ors_limit   = NULL;
 468                 op->ors_slimit  = SLAP_NO_LIMIT;
 469                 op->ors_tlimit  = SLAP_NO_LIMIT;
 470
 471                 /* no attrs! */
 472                 op->ors_attrs = slap_anlist_no_attrs;
 473
 474                 op->o_req_ndn = id->dn;
 475                 op->o_req_dn = id->dn;
 476                 op->o_bd = rq->db;
 477                 op->o_dn = op->o_bd->be_rootdn;
 478                 op->o_ndn = op->o_bd->be_rootndn;
 479                 slap_op_time( &op->o_time, &op->o_tincr );
 480
 481                 /* search */
 482                 rc = op->o_bd->be_search(op, &rs);
 483
 484                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 485
 486                 if(rc != LDAP_SUCCESS) {
 487                         Debug( LDAP_DEBUG_TRACE,
 488                                 "refint_response: search failed: %d\n",
 489                                 rc, 0, 0 );
 490                         continue;
 491                 }
 492
 493                 /* safety? paranoid just in case */
 494                 if(!cb.sc_private) {
 495                         Debug( LDAP_DEBUG_TRACE,
 496                                 "refint_response: callback wiped out sc_private?!\n",
 497                                 0, 0, 0 );
 498                         continue;
 499                 }
 500
 501                 /* Set up the Modify requests */
 502                 cb.sc_response  = &slap_null_cb;
 503                 op->o_tag       = LDAP_REQ_MODIFY;
 504
 505                 /*
 506                 ** [our search callback builds a list of attrs]
 507                 ** foreach attr:
 508                 **      make sure its dn has a backend;
 509                 **      build Modification* chain;
 510                 **      call the backend modify function;
 511                 **
 512                 */
 513
 514                 for(dp = rq->attrs; dp; dp = dp->next) {
 515                         Modifications *m, *first = NULL;
 516
 517                         op->orm_modlist = NULL;
 518
 519                         op->o_req_dn    = dp->dn;
 520                         op->o_req_ndn   = dp->ndn;
 521                         op->o_bd = select_backend(&dp->ndn, 0, 1);
 522                         if(!op->o_bd) {
 523                                 Debug( LDAP_DEBUG_TRACE,
 524                                         "refint_response: no backend for DN %s!\n",
 525                                         dp->dn.bv_val, 0, 0 );
 526                                 goto done;
 527                         }
 528                         rs.sr_type      = REP_RESULT;
 529                         for (ra = dp->attrs; ra; ra = dp->attrs) {
 530                                 dp->attrs = ra->next;
 531                                 /* Set our ModifiersName */
 532                                 if ( SLAP_LASTMOD( op->o_bd )) {
 533                                         m = op->o_tmpalloc( sizeof(Modifications) +
 534                                                 4*sizeof(BerValue), op->o_tmpmemctx );
 535                                         m->sml_next = op->orm_modlist;
 536                                         if ( !first )
 537                                                 first = m;
 538                                         op->orm_modlist = m;
 539                                         m->sml_op = LDAP_MOD_REPLACE;
 540                                         m->sml_flags = SLAP_MOD_INTERNAL;
 541                                         m->sml_desc = slap_schema.si_ad_modifiersName;
 542                                         m->sml_type = m->sml_desc->ad_cname;
 543                                         m->sml_values = (BerVarray)(m+1);
 544                                         m->sml_nvalues = m->sml_values+2;
 545                                         BER_BVZERO( &m->sml_values[1] );
 546                                         BER_BVZERO( &m->sml_nvalues[1] );
 547                                         m->sml_values[0] = refint_dn;
 548                                         m->sml_nvalues[0] = refint_ndn;
 549                                 }
 550                                 if ( !BER_BVISEMPTY( &rq->newdn ) || ( ra->next &&
 551                                         ra->attr == ra->next->attr )) {
 552                                         m = op->o_tmpalloc( sizeof(Modifications) +
 553                                                 4*sizeof(BerValue), op->o_tmpmemctx );
 554                                         m->sml_next = op->orm_modlist;
 555                                         if ( !first )
 556                                                 first = m;
 557                                         op->orm_modlist = m;
 558                                         m->sml_op = LDAP_MOD_ADD;
 559                                         m->sml_flags = 0;
 560                                         m->sml_desc = ra->attr;
 561                                         m->sml_type = ra->attr->ad_cname;
 562                                         m->sml_values = (BerVarray)(m+1);
 563                                         m->sml_nvalues = m->sml_values+2;
 564                                         BER_BVZERO( &m->sml_values[1] );
 565                                         BER_BVZERO( &m->sml_nvalues[1] );
 566                                         if ( BER_BVISEMPTY( &rq->newdn )) {
 567                                                 op->o_tmpfree( ra, op->o_tmpmemctx );
 568                                                 ra = dp->attrs;
 569                                                 dp->attrs = ra->next;
 570                                                 m->sml_values[0] = id->nothing;
 571                                                 m->sml_nvalues[0] = id->nnothing;
 572                                         } else {
 573                                                 m->sml_values[0] = rq->newdn;
 574                                                 m->sml_nvalues[0] = rq->newndn;
 575                                         }
 576                                 }
 577                                 m = op->o_tmpalloc( sizeof(Modifications) + 4*sizeof(BerValue),
 578                                         op->o_tmpmemctx );
 579                                 m->sml_next = op->orm_modlist;
 580                                 op->orm_modlist = m;
 581                                 if ( !first )
 582                                         first = m;
 583                                 m->sml_op = LDAP_MOD_DELETE;
 584                                 m->sml_flags = 0;
 585                                 m->sml_desc = ra->attr;
 586                                 m->sml_type = ra->attr->ad_cname;
 587                                 m->sml_values = (BerVarray)(m+1);
 588                                 m->sml_nvalues = m->sml_values+2;
 589                                 m->sml_values[0] = rq->olddn;
 590                                 m->sml_nvalues[0] = rq->oldndn;
 591                                 BER_BVZERO( &m->sml_values[1] );
 592                                 BER_BVZERO( &m->sml_nvalues[1] );
 593                                 op->o_tmpfree( ra, op->o_tmpmemctx );
 594                         }
 595
 596                         op->o_dn = op->o_bd->be_rootdn;
 597                         op->o_ndn = op->o_bd->be_rootndn;
 598                         slap_op_time( &op->o_time, &op->o_tincr );
 599                         if((rc = op->o_bd->be_modify(op, &rs)) != LDAP_SUCCESS) {
 600                                 Debug( LDAP_DEBUG_TRACE,
 601                                         "refint_response: dependent modify failed: %d\n",
 602                                         rs.sr_err, 0, 0 );
 603                         }
 604
 605                         while (( m = op->orm_modlist )) {
 606                                 op->orm_modlist = m->sml_next;
 607                                 op->o_tmpfree( m, op->o_tmpmemctx );
 608                                 if ( m == first ) break;
 609                         }
 610                         slap_mods_free( op->orm_modlist, 1 );
 611                         op->o_tmpfree( dp->ndn.bv_val, op->o_tmpmemctx );
 612                         op->o_tmpfree( dp->dn.bv_val, op->o_tmpmemctx );
 613                         op->o_tmpfree( dp, op->o_tmpmemctx );
 614                 }
 615 done:
 616                 if ( !BER_BVISNULL( &rq->newndn )) {
 617                         ch_free( rq->newndn.bv_val );
 618                         ch_free( rq->newdn.bv_val );
 619                 }
 620                 ch_free( rq->oldndn.bv_val );
 621                 ch_free( rq->olddn.bv_val );
 622                 ch_free( rq );
 623         }
 624
 625         /* wait until we get explicitly scheduled again */
 626         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 627         ldap_pvt_runqueue_stoptask( &slapd_rq, id->qtask );
 628         ldap_pvt_runqueue_resched( &slapd_rq,id->qtask, 1 );
 629         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 630
 631         return NULL;
 632 }
 633
 634 /*
 635 ** refint_response
 636 ** search for matching records and modify them
 637 */
 638
 639 static int
 640 refint_response(
 641         Operation *op,
 642         SlapReply *rs
 643 )
 644 {
 645         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 646         refint_data *id = on->on_bi.bi_private;
 647         BerValue pdn;
 648         int rc, ac;
 649         refint_q *rq;
 650         BackendDB *db;
 651         refint_attrs *ip;
 652
 653         id->message = "_refint_response";
 654
 655         /* If the main op failed or is not a Delete or ModRdn, ignore it */
 656         if (( op->o_tag != LDAP_REQ_DELETE && op->o_tag != LDAP_REQ_MODRDN ) ||
 657                 rs->sr_err != LDAP_SUCCESS )
 658                 return SLAP_CB_CONTINUE;
 659
 660         /*
 661         ** validate (and count) the list of attrs;
 662         **
 663         */
 664
 665         for(ip = id->attrs, ac = 0; ip; ip = ip->next, ac++);
 666         if(!ac) {
 667                 Debug( LDAP_DEBUG_TRACE,
 668                         "refint_response called without any attributes\n", 0, 0, 0 );
 669                 return SLAP_CB_CONTINUE;
 670         }
 671
 672         /*
 673         ** find the backend that matches our configured basedn;
 674         ** make sure it exists and has search and modify methods;
 675         **
 676         */
 677
 678         db = select_backend(&id->dn, 0, 1);
 679
 680         if(db) {
 681                 if (!db->be_search || !db->be_modify) {
 682                         Debug( LDAP_DEBUG_TRACE,
 683                                 "refint_response: backend missing search and/or modify\n",
 684                                 0, 0, 0 );
 685                         return SLAP_CB_CONTINUE;
 686                 }
 687         } else {
 688                 Debug( LDAP_DEBUG_TRACE,
 689                         "refint_response: no backend for our baseDN %s??\n",
 690                         id->dn.bv_val, 0, 0 );
 691                 return SLAP_CB_CONTINUE;
 692         }
 693
 694         rq = ch_calloc( 1, sizeof( refint_q ));
 695         ber_dupbv( &rq->olddn, &op->o_req_dn );
 696         ber_dupbv( &rq->oldndn, &op->o_req_ndn );
 697         rq->db = db;
 698         rq->rdata = id;
 699
 700         if(op->o_tag == LDAP_REQ_MODRDN) {
 701                 if ( op->oq_modrdn.rs_newSup ) {
 702                         pdn = *op->oq_modrdn.rs_newSup;
 703                 } else {
 704                         dnParent( &op->o_req_dn, &pdn );
 705                 }
 706                 build_new_dn( &rq->newdn, &pdn, &op->orr_newrdn, NULL );
 707                 if ( op->oq_modrdn.rs_nnewSup ) {
 708                         pdn = *op->oq_modrdn.rs_nnewSup;
 709                 } else {
 710                         dnParent( &op->o_req_ndn, &pdn );
 711                 }
 712                 build_new_dn( &rq->newndn, &pdn, &op->orr_nnewrdn, NULL );
 713         }
 714
 715         ldap_pvt_thread_mutex_lock( &id->qmutex );
 716         if ( id->qtail ) {
 717                 id->qtail->next = rq;
 718         } else {
 719                 id->qhead = rq;
 720         }
 721         id->qtail = rq;
 722         ldap_pvt_thread_mutex_unlock( &id->qmutex );
 723
 724         ac = 0;
 725         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 726         if ( !id->qtask ) {
 727                 id->qtask = ldap_pvt_runqueue_insert( &slapd_rq, RUNQ_INTERVAL,
 728                         refint_qtask, id, "refint_qtask",
 729                         op->o_bd->be_suffix[0].bv_val );
 730                 ac = 1;
 731         } else {
 732                 if ( !ldap_pvt_runqueue_isrunning( &slapd_rq, id->qtask ) &&
 733                         !id->qtask->next_sched.tv_sec ) {
 734                         id->qtask->interval.tv_sec = 0;
 735                         ldap_pvt_runqueue_resched( &slapd_rq, id->qtask, 0 );
 736                         id->qtask->interval.tv_sec = RUNQ_INTERVAL;
 737                         ac = 1;
 738                 }
 739         }
 740         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 741         if ( ac )
 742                 slap_wake_listener();
 743
 744         return SLAP_CB_CONTINUE;
 745 }
 746
 747 /*
 748 ** init_module is last so the symbols resolve "for free" --
 749 ** it expects to be called automagically during dynamic module initialization
 750 */
 751
 752 int refint_initialize() {
 753         int rc;
 754
 755         /* statically declared just after the #includes at top */
 756         refint.on_bi.bi_type = "refint";
 757         refint.on_bi.bi_db_init = refint_db_init;
 758         refint.on_bi.bi_db_destroy = refint_db_destroy;
 759         refint.on_bi.bi_db_open = refint_open;
 760         refint.on_bi.bi_db_close = refint_close;
 761         refint.on_response = refint_response;
 762
 763         refint.on_bi.bi_cf_ocs = refintocs;
 764         rc = config_register_schema ( refintcfg, refintocs );
 765         if ( rc ) return rc;
 766
 767         return(overlay_register(&refint));
 768 }
 769
 770 #if SLAPD_OVER_REFINT == SLAPD_MOD_DYNAMIC && defined(PIC)
 771 int init_module(int argc, char *argv[]) {
 772         return refint_initialize();
 773 }
 774 #endif
 775
 776 #endif /* SLAPD_OVER_REFINT */