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 2004-2006 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           "SYNTAX OMsDirectoryString )", NULL, NULL },
 100         { "refint_nothing", "string", 2, 2, 0,
 101           ARG_DN|ARG_MAGIC|REFINT_NOTHING, refint_cf_gen,
 102           "( OLcfgOvAt:11.2 NAME 'olcRefintNothing' "
 103           "DESC 'Replacement DN to supply when needed' "
 104           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 105         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 106 };
 107
 108 static ConfigOCs refintocs[] = {
 109         { "( OLcfgOvOc:11.1 "
 110           "NAME 'olcRefintConfig' "
 111           "DESC 'Referential integrity configuration' "
 112           "SUP olcOverlayConfig "
 113           "MAY ( olcRefintAttribute $ olcRefintNothing ) )",
 114           Cft_Overlay, refintcfg },
 115         { NULL, 0, NULL }
 116 };
 117
 118 static int
 119 refint_cf_gen(ConfigArgs *c)
 120 {
 121         slap_overinst *on = (slap_overinst *)c->bi;
 122         refint_data *dd = (refint_data *)on->on_bi.bi_private;
 123         refint_attrs *ip, *pip, **pipp = NULL;
 124         AttributeDescription *ad;
 125         const char *text;
 126         int rc = ARG_BAD_CONF;
 127         int i;
 128
 129         switch ( c->op ) {
 130         case SLAP_CONFIG_EMIT:
 131                 switch ( c->type ) {
 132                 case REFINT_ATTRS:
 133                         ip = dd->attrs;
 134                         while ( ip ) {
 135                                 value_add_one( &c->rvalue_vals,
 136                                                &ip->attr->ad_cname );
 137                                 ip = ip->next;
 138                         }
 139                         rc = 0;
 140                         break;
 141                 case REFINT_NOTHING:
 142                         if ( !BER_BVISEMPTY( &dd->nothing )) {
 143                                 rc = value_add_one( &c->rvalue_vals,
 144                                                     &dd->nothing );
 145                                 if ( rc ) return rc;
 146                                 rc = value_add_one( &c->rvalue_nvals,
 147                                                     &dd->nnothing );
 148                                 return rc;
 149                         }
 150                         rc = 0;
 151                         break;
 152                 default:
 153                         abort ();
 154                 }
 155                 break;
 156         case LDAP_MOD_DELETE:
 157                 switch ( c->type ) {
 158                 case REFINT_ATTRS:
 159                         pipp = &dd->attrs;
 160                         if ( c->valx < 0 ) {
 161                                 ip = *pipp;
 162                                 *pipp = NULL;
 163                                 while ( ip ) {
 164                                         pip = ip;
 165                                         ip = ip->next;
 166                                         ch_free ( pip );
 167                                 }
 168                         } else {
 169                                 /* delete from linked list */
 170                                 for ( i=0; i < c->valx; ++i ) {
 171                                         pipp = &(*pipp)->next;
 172                                 }
 173                                 ip = *pipp;
 174                                 *pipp = (*pipp)->next;
 175
 176                                 /* AttributeDescriptions are global so
 177                                  * shouldn't be freed here... */
 178                                 ch_free ( ip );
 179                         }
 180                         rc = 0;
 181                         break;
 182                 case REFINT_NOTHING:
 183                         if ( dd->nothing.bv_val )
 184                                 ber_memfree ( dd->nothing.bv_val );
 185                         if ( dd->nnothing.bv_val )
 186                                 ber_memfree ( dd->nnothing.bv_val );
 187                         dd->nothing.bv_len = 0;
 188                         dd->nnothing.bv_len = 0;
 189                         rc = 0;
 190                         break;
 191                 default:
 192                         abort ();
 193                 }
 194                 break;
 195         case SLAP_CONFIG_ADD:
 196                 /* fallthrough to LDAP_MOD_ADD */
 197         case LDAP_MOD_ADD:
 198                 switch ( c->type ) {
 199                 case REFINT_ATTRS:
 200                         rc = 0;
 201                         for ( i=1; i < c->argc; ++i ) {
 202                                 ad = NULL;
 203                                 if ( slap_str2ad ( c->argv[i], &ad, &text )
 204                                      == LDAP_SUCCESS) {
 205                                         ip = ch_malloc (
 206                                                 sizeof ( refint_attrs ) );
 207                                         ip->attr = ad;
 208                                         ip->next = dd->attrs;
 209                                         dd->attrs = ip;
 210                                 } else {
 211                                         Debug ( LDAP_DEBUG_CONFIG,
 212                                                 "refint add: <%s>: %s\n",
 213                                                 c->argv[i], text, NULL );
 214                                         strncpy ( c->msg,
 215                                                   text,
 216                                                   SLAP_TEXT_BUFLEN-1 );
 217                                         c->msg[SLAP_TEXT_BUFLEN-1] = '\0';
 218                                         rc = ARG_BAD_CONF;
 219                                 }
 220                         }
 221                         break;
 222                 case REFINT_NOTHING:
 223                         if ( dd->nothing.bv_val )
 224                                 ber_memfree ( dd->nothing.bv_val );
 225                         if ( dd->nnothing.bv_val )
 226                                 ber_memfree ( dd->nnothing.bv_val );
 227                         dd->nothing = c->value_dn;
 228                         dd->nnothing = c->value_ndn;
 229                         rc = 0;
 230                         break;
 231                 default:
 232                         abort ();
 233                 }
 234                 break;
 235         default:
 236                 abort ();
 237         }
 238
 239         return rc;
 240 }
 241
 242 /*
 243 ** allocate new refint_data;
 244 ** store in on_bi.bi_private;
 245 **
 246 */
 247
 248 static int
 249 refint_db_init(
 250         BackendDB       *be
 251 )
 252 {
 253         slap_overinst *on = (slap_overinst *)be->bd_info;
 254         refint_data *id = ch_calloc(1,sizeof(refint_data));
 255
 256         id->message = "_init";
 257         on->on_bi.bi_private = id;
 258         ldap_pvt_thread_mutex_init( &id->qmutex );
 259         return(0);
 260 }
 261
 262 static int
 263 refint_db_destroy(
 264         BackendDB       *be
 265 )
 266 {
 267         slap_overinst *on = (slap_overinst *)be->bd_info;
 268
 269         if ( on->on_bi.bi_private ) {
 270                 refint_data *id = on->on_bi.bi_private;
 271                 on->on_bi.bi_private = NULL;
 272                 ldap_pvt_thread_mutex_destroy( &id->qmutex );
 273                 ch_free( id );
 274         }
 275         return(0);
 276 }
 277
 278 /*
 279 ** initialize, copy basedn if not already set
 280 **
 281 */
 282
 283 static int
 284 refint_open(
 285         BackendDB *be
 286 )
 287 {
 288         slap_overinst *on       = (slap_overinst *)be->bd_info;
 289         refint_data *id = on->on_bi.bi_private;
 290         id->message             = "_open";
 291
 292         if ( BER_BVISNULL( &id->dn )) {
 293                 if ( BER_BVISNULL( &be->be_nsuffix[0] ))
 294                         return -1;
 295                 ber_dupbv( &id->dn, &be->be_nsuffix[0] );
 296         }
 297         return(0);
 298 }
 299
 300
 301 /*
 302 ** foreach configured attribute:
 303 **      free it;
 304 ** free our basedn;
 305 ** (do not) free id->message;
 306 ** reset on_bi.bi_private;
 307 ** free our config data;
 308 **
 309 */
 310
 311 static int
 312 refint_close(
 313         BackendDB *be
 314 )
 315 {
 316         slap_overinst *on       = (slap_overinst *) be->bd_info;
 317         refint_data *id = on->on_bi.bi_private;
 318         refint_attrs *ii, *ij;
 319         id->message             = "_close";
 320
 321         for(ii = id->attrs; ii; ii = ij) {
 322                 ij = ii->next;
 323                 ch_free(ii);
 324         }
 325
 326         ch_free(id->dn.bv_val);
 327         ch_free(id->nothing.bv_val);
 328         ch_free(id->nnothing.bv_val);
 329
 330         memset( id, 0, sizeof(*id));
 331
 332         return(0);
 333 }
 334
 335 /*
 336 ** search callback
 337 ** generates a list of Attributes from search results
 338 */
 339
 340 static int
 341 refint_search_cb(
 342         Operation *op,
 343         SlapReply *rs
 344 )
 345 {
 346         Attribute *a;
 347         BerVarray b = NULL;
 348         refint_q *rq = op->o_callback->sc_private;
 349         refint_data *dd = rq->rdata;
 350         refint_attrs *ia, *da = dd->attrs, *na;
 351         dependent_data *ip;
 352         int i;
 353
 354         Debug(LDAP_DEBUG_TRACE, "refint_search_cb <%s>\n",
 355                 rs->sr_entry ? rs->sr_entry->e_name.bv_val : "NOTHING", 0, 0);
 356
 357         if (rs->sr_type != REP_SEARCH || !rs->sr_entry) return(0);
 358
 359         /*
 360         ** foreach configured attribute type:
 361         **      if this attr exists in the search result,
 362         **      and it has a value matching the target:
 363         **              allocate an attr;
 364         **              if this is a delete and there's only one value:
 365         **                      allocate the same attr again;
 366         **
 367         */
 368
 369         ip = op->o_tmpalloc(sizeof(dependent_data), op->o_tmpmemctx );
 370         ber_dupbv_x( &ip->dn, &rs->sr_entry->e_name, op->o_tmpmemctx );
 371         ber_dupbv_x( &ip->ndn, &rs->sr_entry->e_nname, op->o_tmpmemctx );
 372         ip->next = rq->attrs;
 373         rq->attrs = ip;
 374         ip->attrs = NULL;
 375         for(ia = da; ia; ia = ia->next) {
 376             if ( (a = attr_find(rs->sr_entry->e_attrs, ia->attr) ) )
 377                 for(i = 0, b = a->a_nvals; b[i].bv_val; i++)
 378                     if(bvmatch(&rq->oldndn, &b[i])) {
 379                         na = op->o_tmpalloc(sizeof( refint_attrs ), op->o_tmpmemctx );
 380                         na->next = ip->attrs;
 381                         ip->attrs = na;
 382                         na->attr = ia->attr;
 383                         /* If this is a delete and there's only one value, and
 384                          * we have a nothing DN configured, allocate the attr again.
 385                          */
 386                         if(!b[1].bv_val && BER_BVISEMPTY( &rq->newdn ) &&
 387                                 dd->nothing.bv_val) {
 388                                 na = op->o_tmpalloc(sizeof( refint_attrs ), op->o_tmpmemctx );
 389                                 na->next = ip->attrs;
 390                                 ip->attrs = na;
 391                                 na->attr = ia->attr;
 392                         }
 393                         Debug(LDAP_DEBUG_TRACE, "refint_search_cb: %s: %s\n",
 394                                 a->a_desc->ad_cname.bv_val, rq->olddn.bv_val, 0);
 395                         break;
 396             }
 397         }
 398         return(0);
 399 }
 400
 401 static void *
 402 refint_qtask( void *ctx, void *arg )
 403 {
 404         struct re_s *rtask = arg;
 405         refint_data *id = rtask->arg;
 406         Connection conn = {0};
 407         OperationBuffer opbuf;
 408         Operation *op;
 409         SlapReply rs = {REP_RESULT};
 410         slap_callback cb = { NULL, NULL, NULL, NULL };
 411         Filter ftop, *fptr;
 412         refint_q *rq;
 413         dependent_data *dp;
 414         refint_attrs *ra, *ip;
 415         int rc;
 416
 417         op = (Operation *) &opbuf;
 418         connection_fake_init( &conn, op, ctx );
 419
 420         /*
 421         ** build a search filter for all configured attributes;
 422         ** populate our Operation;
 423         ** pass our data (attr list, dn) to backend via sc_private;
 424         ** call the backend search function;
 425         ** nb: (|(one=thing)) is valid, but do smart formatting anyway;
 426         ** nb: 16 is arbitrarily a dozen or so extra bytes;
 427         **
 428         */
 429
 430         ftop.f_choice = LDAP_FILTER_OR;
 431         ftop.f_next = NULL;
 432         ftop.f_or = NULL;
 433         op->ors_filter = &ftop;
 434         for(ip = id->attrs; ip; ip = ip->next) {
 435                 fptr = op->o_tmpalloc( sizeof(Filter) + sizeof(AttributeAssertion),
 436                         op->o_tmpmemctx );
 437                 fptr->f_choice = LDAP_FILTER_EQUALITY;
 438                 fptr->f_ava = (AttributeAssertion *)(fptr+1);
 439                 fptr->f_ava->aa_desc = ip->attr;
 440                 fptr->f_next = ftop.f_or;
 441                 ftop.f_or = fptr;
 442         }
 443
 444         for (;;) {
 445                 /* Dequeue an op */
 446                 ldap_pvt_thread_mutex_lock( &id->qmutex );
 447                 rq = id->qhead;
 448                 if ( rq ) {
 449                         id->qhead = rq->next;
 450                         if ( !id->qhead )
 451                                 id->qtail = NULL;
 452                 }
 453                 ldap_pvt_thread_mutex_unlock( &id->qmutex );
 454                 if ( !rq )
 455                         break;
 456
 457                 for (fptr = ftop.f_or; fptr; fptr=fptr->f_next )
 458                         fptr->f_av_value = rq->oldndn;
 459
 460                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
 461
 462                 /* callback gets the searched dn instead */
 463                 cb.sc_private   = rq;
 464                 cb.sc_response  = refint_search_cb;
 465                 op->o_callback  = &cb;
 466                 op->o_tag       = LDAP_REQ_SEARCH;
 467                 op->ors_scope   = LDAP_SCOPE_SUBTREE;
 468                 op->ors_deref   = LDAP_DEREF_NEVER;
 469                 op->ors_limit   = NULL;
 470                 op->ors_slimit  = SLAP_NO_LIMIT;
 471                 op->ors_tlimit  = SLAP_NO_LIMIT;
 472
 473                 /* no attrs! */
 474                 op->ors_attrs = slap_anlist_no_attrs;
 475
 476                 op->o_req_ndn = id->dn;
 477                 op->o_req_dn = id->dn;
 478                 op->o_bd = rq->db;
 479                 op->o_dn = op->o_bd->be_rootdn;
 480                 op->o_ndn = op->o_bd->be_rootndn;
 481                 slap_op_time( &op->o_time, &op->o_tincr );
 482
 483                 /* search */
 484                 rc = op->o_bd->be_search(op, &rs);
 485
 486                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 487
 488                 if(rc != LDAP_SUCCESS) {
 489                         Debug( LDAP_DEBUG_TRACE,
 490                                 "refint_response: search failed: %d\n",
 491                                 rc, 0, 0 );
 492                         continue;
 493                 }
 494
 495                 /* safety? paranoid just in case */
 496                 if(!cb.sc_private) {
 497                         Debug( LDAP_DEBUG_TRACE,
 498                                 "refint_response: callback wiped out sc_private?!\n",
 499                                 0, 0, 0 );
 500                         continue;
 501                 }
 502
 503                 /* Set up the Modify requests */
 504                 cb.sc_response  = &slap_null_cb;
 505                 op->o_tag       = LDAP_REQ_MODIFY;
 506
 507                 /*
 508                 ** [our search callback builds a list of attrs]
 509                 ** foreach attr:
 510                 **      make sure its dn has a backend;
 511                 **      build Modification* chain;
 512                 **      call the backend modify function;
 513                 **
 514                 */
 515
 516                 for(dp = rq->attrs; dp; dp = dp->next) {
 517                         Modifications *m, *first = NULL;
 518
 519                         op->orm_modlist = NULL;
 520
 521                         op->o_req_dn    = dp->dn;
 522                         op->o_req_ndn   = dp->ndn;
 523                         op->o_bd = select_backend(&dp->ndn, 0, 1);
 524                         if(!op->o_bd) {
 525                                 Debug( LDAP_DEBUG_TRACE,
 526                                         "refint_response: no backend for DN %s!\n",
 527                                         dp->dn.bv_val, 0, 0 );
 528                                 goto done;
 529                         }
 530                         rs.sr_type      = REP_RESULT;
 531                         for (ra = dp->attrs; ra; ra = dp->attrs) {
 532                                 dp->attrs = ra->next;
 533                                 /* Set our ModifiersName */
 534                                 if ( SLAP_LASTMOD( op->o_bd )) {
 535                                         m = op->o_tmpalloc( sizeof(Modifications) +
 536                                                 4*sizeof(BerValue), op->o_tmpmemctx );
 537                                         m->sml_next = op->orm_modlist;
 538                                         if ( !first )
 539                                                 first = m;
 540                                         op->orm_modlist = m;
 541                                         m->sml_op = LDAP_MOD_REPLACE;
 542                                         m->sml_flags = SLAP_MOD_INTERNAL;
 543                                         m->sml_desc = slap_schema.si_ad_modifiersName;
 544                                         m->sml_type = m->sml_desc->ad_cname;
 545                                         m->sml_values = (BerVarray)(m+1);
 546                                         m->sml_nvalues = m->sml_values+2;
 547                                         BER_BVZERO( &m->sml_values[1] );
 548                                         BER_BVZERO( &m->sml_nvalues[1] );
 549                                         m->sml_values[0] = refint_dn;
 550                                         m->sml_nvalues[0] = refint_ndn;
 551                                 }
 552                                 if ( !BER_BVISEMPTY( &rq->newdn ) || ( ra->next &&
 553                                         ra->attr == ra->next->attr )) {
 554                                         m = op->o_tmpalloc( sizeof(Modifications) +
 555                                                 4*sizeof(BerValue), op->o_tmpmemctx );
 556                                         m->sml_next = op->orm_modlist;
 557                                         if ( !first )
 558                                                 first = m;
 559                                         op->orm_modlist = m;
 560                                         m->sml_op = LDAP_MOD_ADD;
 561                                         m->sml_flags = 0;
 562                                         m->sml_desc = ra->attr;
 563                                         m->sml_type = ra->attr->ad_cname;
 564                                         m->sml_values = (BerVarray)(m+1);
 565                                         m->sml_nvalues = m->sml_values+2;
 566                                         BER_BVZERO( &m->sml_values[1] );
 567                                         BER_BVZERO( &m->sml_nvalues[1] );
 568                                         if ( BER_BVISEMPTY( &rq->newdn )) {
 569                                                 op->o_tmpfree( ra, op->o_tmpmemctx );
 570                                                 ra = dp->attrs;
 571                                                 dp->attrs = ra->next;
 572                                                 m->sml_values[0] = id->nothing;
 573                                                 m->sml_nvalues[0] = id->nnothing;
 574                                         } else {
 575                                                 m->sml_values[0] = rq->newdn;
 576                                                 m->sml_nvalues[0] = rq->newndn;
 577                                         }
 578                                 }
 579                                 m = op->o_tmpalloc( sizeof(Modifications) + 4*sizeof(BerValue),
 580                                         op->o_tmpmemctx );
 581                                 m->sml_next = op->orm_modlist;
 582                                 op->orm_modlist = m;
 583                                 if ( !first )
 584                                         first = m;
 585                                 m->sml_op = LDAP_MOD_DELETE;
 586                                 m->sml_flags = 0;
 587                                 m->sml_desc = ra->attr;
 588                                 m->sml_type = ra->attr->ad_cname;
 589                                 m->sml_values = (BerVarray)(m+1);
 590                                 m->sml_nvalues = m->sml_values+2;
 591                                 m->sml_values[0] = rq->olddn;
 592                                 m->sml_nvalues[0] = rq->oldndn;
 593                                 BER_BVZERO( &m->sml_values[1] );
 594                                 BER_BVZERO( &m->sml_nvalues[1] );
 595                                 op->o_tmpfree( ra, op->o_tmpmemctx );
 596                         }
 597
 598                         op->o_dn = op->o_bd->be_rootdn;
 599                         op->o_ndn = op->o_bd->be_rootndn;
 600                         slap_op_time( &op->o_time, &op->o_tincr );
 601                         if((rc = op->o_bd->be_modify(op, &rs)) != LDAP_SUCCESS) {
 602                                 Debug( LDAP_DEBUG_TRACE,
 603                                         "refint_response: dependent modify failed: %d\n",
 604                                         rs.sr_err, 0, 0 );
 605                         }
 606
 607                         while (( m = op->orm_modlist )) {
 608                                 op->orm_modlist = m->sml_next;
 609                                 op->o_tmpfree( m, op->o_tmpmemctx );
 610                                 if ( m == first ) break;
 611                         }
 612                         slap_mods_free( op->orm_modlist, 1 );
 613                         op->o_tmpfree( dp->ndn.bv_val, op->o_tmpmemctx );
 614                         op->o_tmpfree( dp->dn.bv_val, op->o_tmpmemctx );
 615                         op->o_tmpfree( dp, op->o_tmpmemctx );
 616                 }
 617 done:
 618                 if ( !BER_BVISNULL( &rq->newndn )) {
 619                         ch_free( rq->newndn.bv_val );
 620                         ch_free( rq->newdn.bv_val );
 621                 }
 622                 ch_free( rq->oldndn.bv_val );
 623                 ch_free( rq->olddn.bv_val );
 624                 ch_free( rq );
 625         }
 626
 627         /* wait until we get explicitly scheduled again */
 628         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 629         ldap_pvt_runqueue_stoptask( &slapd_rq, id->qtask );
 630         ldap_pvt_runqueue_resched( &slapd_rq,id->qtask, 1 );
 631         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 632
 633         return NULL;
 634 }
 635
 636 /*
 637 ** refint_response
 638 ** search for matching records and modify them
 639 */
 640
 641 static int
 642 refint_response(
 643         Operation *op,
 644         SlapReply *rs
 645 )
 646 {
 647         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 648         refint_data *id = on->on_bi.bi_private;
 649         BerValue pdn;
 650         int rc, ac;
 651         refint_q *rq;
 652         BackendDB *db;
 653         refint_attrs *ip;
 654
 655         id->message = "_refint_response";
 656
 657         /* If the main op failed or is not a Delete or ModRdn, ignore it */
 658         if (( op->o_tag != LDAP_REQ_DELETE && op->o_tag != LDAP_REQ_MODRDN ) ||
 659                 rs->sr_err != LDAP_SUCCESS )
 660                 return SLAP_CB_CONTINUE;
 661
 662         /*
 663         ** validate (and count) the list of attrs;
 664         **
 665         */
 666
 667         for(ip = id->attrs, ac = 0; ip; ip = ip->next, ac++);
 668         if(!ac) {
 669                 Debug( LDAP_DEBUG_TRACE,
 670                         "refint_response called without any attributes\n", 0, 0, 0 );
 671                 return SLAP_CB_CONTINUE;
 672         }
 673
 674         /*
 675         ** find the backend that matches our configured basedn;
 676         ** make sure it exists and has search and modify methods;
 677         **
 678         */
 679
 680         db = select_backend(&id->dn, 0, 1);
 681
 682         if(db) {
 683                 if (!db->be_search || !db->be_modify) {
 684                         Debug( LDAP_DEBUG_TRACE,
 685                                 "refint_response: backend missing search and/or modify\n",
 686                                 0, 0, 0 );
 687                         return SLAP_CB_CONTINUE;
 688                 }
 689         } else {
 690                 Debug( LDAP_DEBUG_TRACE,
 691                         "refint_response: no backend for our baseDN %s??\n",
 692                         id->dn.bv_val, 0, 0 );
 693                 return SLAP_CB_CONTINUE;
 694         }
 695
 696         rq = ch_calloc( 1, sizeof( refint_q ));
 697         ber_dupbv( &rq->olddn, &op->o_req_dn );
 698         ber_dupbv( &rq->oldndn, &op->o_req_ndn );
 699         rq->db = db;
 700         rq->rdata = id;
 701
 702         if(op->o_tag == LDAP_REQ_MODRDN) {
 703                 if ( op->oq_modrdn.rs_newSup ) {
 704                         pdn = *op->oq_modrdn.rs_newSup;
 705                 } else {
 706                         dnParent( &op->o_req_dn, &pdn );
 707                 }
 708                 build_new_dn( &rq->newdn, &pdn, &op->orr_newrdn, NULL );
 709                 if ( op->oq_modrdn.rs_nnewSup ) {
 710                         pdn = *op->oq_modrdn.rs_nnewSup;
 711                 } else {
 712                         dnParent( &op->o_req_ndn, &pdn );
 713                 }
 714                 build_new_dn( &rq->newndn, &pdn, &op->orr_nnewrdn, NULL );
 715         }
 716
 717         ldap_pvt_thread_mutex_lock( &id->qmutex );
 718         if ( id->qtail ) {
 719                 id->qtail->next = rq;
 720         } else {
 721                 id->qhead = rq;
 722         }
 723         id->qtail = rq;
 724         ldap_pvt_thread_mutex_unlock( &id->qmutex );
 725
 726         ac = 0;
 727         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 728         if ( !id->qtask ) {
 729                 id->qtask = ldap_pvt_runqueue_insert( &slapd_rq, RUNQ_INTERVAL,
 730                         refint_qtask, id, "refint_qtask",
 731                         op->o_bd->be_suffix[0].bv_val );
 732                 ac = 1;
 733         } else {
 734                 if ( !ldap_pvt_runqueue_isrunning( &slapd_rq, id->qtask ) &&
 735                         !id->qtask->next_sched.tv_sec ) {
 736                         id->qtask->interval.tv_sec = 0;
 737                         ldap_pvt_runqueue_resched( &slapd_rq, id->qtask, 0 );
 738                         id->qtask->interval.tv_sec = RUNQ_INTERVAL;
 739                         ac = 1;
 740                 }
 741         }
 742         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 743         if ( ac )
 744                 slap_wake_listener();
 745
 746         return SLAP_CB_CONTINUE;
 747 }
 748
 749 /*
 750 ** init_module is last so the symbols resolve "for free" --
 751 ** it expects to be called automagically during dynamic module initialization
 752 */
 753
 754 int refint_initialize() {
 755         int rc;
 756
 757         /* statically declared just after the #includes at top */
 758         refint.on_bi.bi_type = "refint";
 759         refint.on_bi.bi_db_init = refint_db_init;
 760         refint.on_bi.bi_db_destroy = refint_db_destroy;
 761         refint.on_bi.bi_db_open = refint_open;
 762         refint.on_bi.bi_db_close = refint_close;
 763         refint.on_response = refint_response;
 764
 765         refint.on_bi.bi_cf_ocs = refintocs;
 766         rc = config_register_schema ( refintcfg, refintocs );
 767         if ( rc ) return rc;
 768
 769         return(overlay_register(&refint));
 770 }
 771
 772 #if SLAPD_OVER_REFINT == SLAPD_MOD_DYNAMIC && defined(PIC)
 773 int init_module(int argc, char *argv[]) {
 774         return refint_initialize();
 775 }
 776 #endif
 777
 778 #endif /* SLAPD_OVER_REFINT */