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

   1 /* glue.c - backend glue overlay */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2001-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 /*
  18  * Functions to glue a bunch of other backends into a single tree.
  19  * All of the glued backends must share a common suffix. E.g., you
  20  * can glue o=foo and ou=bar,o=foo but you can't glue o=foo and o=bar.
  21  *
  22  * The purpose of these functions is to allow you to split a single database
  23  * into pieces (for load balancing purposes, whatever) but still be able
  24  * to treat it as a single database after it's been split. As such, each
  25  * of the glued backends should have identical rootdn.
  26  *  -- Howard Chu
  27  */
  28
  29 #include "portable.h"
  30
  31 #ifdef SLAPD_OVER_GLUE
  32
  33 #include <stdio.h>
  34
  35 #include <ac/string.h>
  36 #include <ac/socket.h>
  37
  38 #define SLAPD_TOOLS
  39 #include "slap.h"
  40
  41 typedef struct gluenode {
  42         BackendDB *gn_be;
  43         int     gn_bx;
  44         struct berval gn_pdn;
  45         int gn_async;
  46 } gluenode;
  47
  48 typedef struct glueinfo {
  49         int gi_nodes;
  50         struct berval gi_pdn;
  51         gluenode gi_n[1];
  52 } glueinfo;
  53
  54 static slap_overinst    glue;
  55
  56 static int glueMode;
  57 static BackendDB *glueBack;
  58
  59 static slap_response glue_op_response;
  60
  61 /* Just like select_backend, but only for our backends */
  62 static BackendDB *
  63 glue_back_select (
  64         BackendDB *be,
  65         struct berval *dn
  66 )
  67 {
  68         slap_overinst   *on = (slap_overinst *)be->bd_info;
  69         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
  70         int i;
  71
  72         for (i = 0; i<gi->gi_nodes; i++) {
  73                 assert( gi->gi_n[i].gn_be->be_nsuffix );
  74
  75                 if (dnIsSuffix(dn, &gi->gi_n[i].gn_be->be_nsuffix[0])) {
  76                         return gi->gi_n[i].gn_be;
  77                 }
  78         }
  79         be->bd_info = on->on_info->oi_orig;
  80         return be;
  81 }
  82
  83
  84 typedef struct glue_state {
  85         int err;
  86         int slimit;
  87         int matchlen;
  88         char *matched;
  89         int nrefs;
  90         BerVarray refs;
  91 } glue_state;
  92
  93 static int
  94 glue_op_response ( Operation *op, SlapReply *rs )
  95 {
  96         glue_state *gs = op->o_callback->sc_private;
  97
  98         switch(rs->sr_type) {
  99         case REP_SEARCH:
 100                 if ( gs->slimit != SLAP_NO_LIMIT
 101                                 && rs->sr_nentries >= gs->slimit )
 102                 {
 103                         rs->sr_err = gs->err = LDAP_SIZELIMIT_EXCEEDED;
 104                         return -1;
 105                 }
 106                 /* fallthru */
 107         case REP_SEARCHREF:
 108                 return SLAP_CB_CONTINUE;
 109
 110         default:
 111                 if (rs->sr_err == LDAP_SUCCESS ||
 112                         rs->sr_err == LDAP_SIZELIMIT_EXCEEDED ||
 113                         rs->sr_err == LDAP_TIMELIMIT_EXCEEDED ||
 114                         rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 115                         rs->sr_err == LDAP_NO_SUCH_OBJECT ||
 116                         gs->err != LDAP_SUCCESS)
 117                         gs->err = rs->sr_err;
 118                 if (gs->err == LDAP_SUCCESS && gs->matched) {
 119                         ch_free (gs->matched);
 120                         gs->matched = NULL;
 121                         gs->matchlen = 0;
 122                 }
 123                 if (gs->err != LDAP_SUCCESS && rs->sr_matched) {
 124                         int len;
 125                         len = strlen (rs->sr_matched);
 126                         if (len > gs->matchlen) {
 127                                 if (gs->matched)
 128                                         ch_free (gs->matched);
 129                                 gs->matched = ch_strdup (rs->sr_matched);
 130                                 gs->matchlen = len;
 131                         }
 132                 }
 133                 if (rs->sr_ref) {
 134                         int i, j, k;
 135                         BerVarray new;
 136
 137                         for (i=0; rs->sr_ref[i].bv_val; i++);
 138
 139                         j = gs->nrefs;
 140                         if (!j) {
 141                                 new = ch_malloc ((i+1)*sizeof(struct berval));
 142                         } else {
 143                                 new = ch_realloc(gs->refs,
 144                                         (j+i+1)*sizeof(struct berval));
 145                         }
 146                         for (k=0; k<i; j++,k++) {
 147                                 ber_dupbv( &new[j], &rs->sr_ref[k] );
 148                         }
 149                         new[j].bv_val = NULL;
 150                         gs->nrefs = j;
 151                         gs->refs = new;
 152                 }
 153         }
 154         return 0;
 155 }
 156
 157 enum glue_which {
 158         op_modify = 0,
 159         op_modrdn,
 160         op_add,
 161         op_delete
 162 };
 163
 164 static int
 165 glue_op_func ( Operation *op, SlapReply *rs )
 166 {
 167         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 168         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 169         BackendDB *b0 = op->o_bd;
 170         BackendInfo *bi0 = op->o_bd->bd_info;
 171         BI_op_modify **func;
 172         enum glue_which which;
 173         int rc;
 174
 175         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 176         b0->bd_info = on->on_info->oi_orig;
 177
 178         switch(op->o_tag) {
 179         case LDAP_REQ_ADD: which = op_add; break;
 180         case LDAP_REQ_DELETE: which = op_delete; break;
 181         case LDAP_REQ_MODIFY: which = op_modify; break;
 182         case LDAP_REQ_MODRDN: which = op_modrdn; break;
 183         }
 184
 185         func = &op->o_bd->bd_info->bi_op_modify;
 186         if ( func[which] )
 187                 rc = func[which]( op, rs );
 188         else
 189                 rc = SLAP_CB_CONTINUE;
 190
 191         op->o_bd = b0;
 192         op->o_bd->bd_info = bi0;
 193         return rc;
 194 }
 195
 196 static int
 197 glue_chk_referrals ( Operation *op, SlapReply *rs )
 198 {
 199         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 200         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 201         BackendDB *b0 = op->o_bd;
 202         BackendInfo *bi0 = op->o_bd->bd_info;
 203         int rc;
 204
 205         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 206         b0->bd_info = on->on_info->oi_orig;
 207
 208         if ( op->o_bd->bd_info->bi_chk_referrals )
 209                 rc = ( *op->o_bd->bd_info->bi_chk_referrals )( op, rs );
 210         else
 211                 rc = SLAP_CB_CONTINUE;
 212
 213         op->o_bd = b0;
 214         op->o_bd->bd_info = bi0;
 215         return rc;
 216 }
 217
 218 static int
 219 glue_chk_controls ( Operation *op, SlapReply *rs )
 220 {
 221         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 222         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 223         BackendDB *b0 = op->o_bd;
 224         BackendInfo *bi0 = op->o_bd->bd_info;
 225         int rc;
 226
 227         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 228         b0->bd_info = on->on_info->oi_orig;
 229
 230         if ( op->o_bd->bd_info->bi_chk_controls )
 231                 rc = ( *op->o_bd->bd_info->bi_chk_controls )( op, rs );
 232         else
 233                 rc = SLAP_CB_CONTINUE;
 234
 235         op->o_bd = b0;
 236         op->o_bd->bd_info = bi0;
 237         return rc;
 238 }
 239
 240 static int
 241 glue_op_search ( Operation *op, SlapReply *rs )
 242 {
 243         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 244         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 245         BackendDB *b0 = op->o_bd;
 246         BackendDB *b1 = NULL, *btmp;
 247         BackendInfo *bi0 = op->o_bd->bd_info;
 248         int i;
 249         long stoptime = 0;
 250         glue_state gs = {0, 0, 0, NULL, 0, NULL};
 251         slap_callback cb = { NULL, glue_op_response, NULL, NULL };
 252         int scope0, slimit0, tlimit0;
 253         struct berval dn, ndn, *pdn;
 254
 255         cb.sc_private = &gs;
 256
 257         cb.sc_next = op->o_callback;
 258
 259         stoptime = slap_get_time () + op->ors_tlimit;
 260
 261         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 262         b0->bd_info = on->on_info->oi_orig;
 263
 264         switch (op->ors_scope) {
 265         case LDAP_SCOPE_BASE:
 266                 return SLAP_CB_CONTINUE;
 267
 268         case LDAP_SCOPE_ONELEVEL:
 269         case LDAP_SCOPE_SUBTREE:
 270 #ifdef LDAP_SCOPE_SUBORDINATE
 271         case LDAP_SCOPE_SUBORDINATE: /* FIXME */
 272 #endif
 273
 274 #if 0
 275                 if ( op->o_sync ) {
 276                         if (op->o_bd && op->o_bd->be_search) {
 277                                 rs->sr_err = op->o_bd->be_search( op, rs );
 278                         } else {
 279                                 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
 280                                                 "No search target found");
 281                         }
 282                         return rs->sr_err;
 283                 }
 284 #endif
 285
 286                 op->o_callback = &cb;
 287                 rs->sr_err = gs.err = LDAP_UNWILLING_TO_PERFORM;
 288                 scope0 = op->ors_scope;
 289                 slimit0 = gs.slimit = op->ors_slimit;
 290                 tlimit0 = op->ors_tlimit;
 291                 dn = op->o_req_dn;
 292                 ndn = op->o_req_ndn;
 293                 b1 = op->o_bd;
 294
 295                 /*
 296                  * Execute in reverse order, most general first
 297                  */
 298                 for (i = gi->gi_nodes; i >= 0; i--) {
 299                         if ( i == gi->gi_nodes ) {
 300                                 btmp = b0;
 301                                 pdn = &gi->gi_pdn;
 302                         } else {
 303                                 btmp = gi->gi_n[i].gn_be;
 304                                 pdn = &gi->gi_n[i].gn_pdn;
 305                         }
 306                         if (!btmp || !btmp->be_search)
 307                                 continue;
 308                         if (!dnIsSuffix(&btmp->be_nsuffix[0], &b1->be_nsuffix[0]))
 309                                 continue;
 310                         if (tlimit0 != SLAP_NO_LIMIT) {
 311                                 op->ors_tlimit = stoptime - slap_get_time ();
 312                                 if (op->ors_tlimit <= 0) {
 313                                         rs->sr_err = gs.err = LDAP_TIMELIMIT_EXCEEDED;
 314                                         break;
 315                                 }
 316                         }
 317                         if (slimit0 != SLAP_NO_LIMIT) {
 318                                 op->ors_slimit = slimit0 - rs->sr_nentries;
 319                                 if (op->ors_slimit < 0) {
 320                                         rs->sr_err = gs.err = LDAP_SIZELIMIT_EXCEEDED;
 321                                         break;
 322                                 }
 323                         }
 324                         rs->sr_err = 0;
 325                         /*
 326                          * check for abandon
 327                          */
 328                         if (op->o_abandon) {
 329                                 goto end_of_loop;
 330                         }
 331                         op->o_bd = btmp;
 332
 333                         assert( op->o_bd->be_suffix );
 334                         assert( op->o_bd->be_nsuffix );
 335
 336                         if (scope0 == LDAP_SCOPE_ONELEVEL &&
 337                                 dn_match(pdn, &ndn))
 338                         {
 339                                 op->ors_scope = LDAP_SCOPE_BASE;
 340                                 op->o_req_dn = op->o_bd->be_suffix[0];
 341                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 342                                 rs->sr_err = op->o_bd->be_search(op, rs);
 343
 344                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 345                                 dn_match(&op->o_bd->be_nsuffix[0], &ndn))
 346                         {
 347                                 rs->sr_err = op->o_bd->be_search( op, rs );
 348
 349                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 350                                 dnIsSuffix(&op->o_bd->be_nsuffix[0], &ndn))
 351                         {
 352                                 op->o_req_dn = op->o_bd->be_suffix[0];
 353                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 354                                 rs->sr_err = op->o_bd->be_search( op, rs );
 355                                 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
 356                                         gs.err = LDAP_SUCCESS;
 357                                 }
 358
 359                         } else if (dnIsSuffix(&ndn, &op->o_bd->be_nsuffix[0])) {
 360                                 rs->sr_err = op->o_bd->be_search( op, rs );
 361                         }
 362
 363                         switch ( gs.err ) {
 364
 365                         /*
 366                          * Add errors that should result in dropping
 367                          * the search
 368                          */
 369                         case LDAP_SIZELIMIT_EXCEEDED:
 370                         case LDAP_TIMELIMIT_EXCEEDED:
 371                         case LDAP_ADMINLIMIT_EXCEEDED:
 372                         case LDAP_NO_SUCH_OBJECT:
 373                                 goto end_of_loop;
 374
 375                         default:
 376                                 break;
 377                         }
 378                 }
 379 end_of_loop:;
 380                 op->ors_scope = scope0;
 381                 op->ors_slimit = slimit0;
 382                 op->ors_tlimit = tlimit0;
 383                 op->o_req_dn = dn;
 384                 op->o_req_ndn = ndn;
 385
 386                 break;
 387         }
 388         if ( !op->o_abandon ) {
 389                 op->o_callback = cb.sc_next;
 390                 rs->sr_err = gs.err;
 391                 rs->sr_matched = gs.matched;
 392                 rs->sr_ref = gs.refs;
 393
 394                 send_ldap_result( op, rs );
 395         }
 396
 397         op->o_bd = b0;
 398         op->o_bd->bd_info = bi0;
 399         if (gs.matched)
 400                 free (gs.matched);
 401         if (gs.refs)
 402                 ber_bvarray_free(gs.refs);
 403         return rs->sr_err;
 404 }
 405
 406 static BackendDB toolDB;
 407
 408 static int
 409 glue_tool_entry_open (
 410         BackendDB *b0,
 411         int mode
 412 )
 413 {
 414         slap_overinfo   *oi = (slap_overinfo *)b0->bd_info;
 415
 416         /* We don't know which backend to talk to yet, so just
 417          * remember the mode and move on...
 418          */
 419
 420         glueMode = mode;
 421         glueBack = NULL;
 422         toolDB = *b0;
 423         toolDB.bd_info = oi->oi_orig;
 424
 425         return 0;
 426 }
 427
 428 static int
 429 glue_tool_entry_close (
 430         BackendDB *b0
 431 )
 432 {
 433         int rc = 0;
 434
 435         if (glueBack) {
 436                 if (!glueBack->be_entry_close)
 437                         return 0;
 438                 rc = glueBack->be_entry_close (glueBack);
 439         }
 440         return rc;
 441 }
 442
 443 static slap_overinst *
 444 glue_tool_inst(
 445         BackendInfo *bi
 446 )
 447 {
 448         slap_overinfo   *oi = (slap_overinfo *)bi;
 449         slap_overinst   *on;
 450
 451         for ( on = oi->oi_list; on; on=on->on_next ) {
 452                 if ( !strcmp( on->on_bi.bi_type, glue.on_bi.bi_type ))
 453                         return on;
 454         }
 455         return NULL;
 456 }
 457
 458 /* This function will only be called in tool mode */
 459 static int
 460 glue_open (
 461         BackendInfo *bi
 462 )
 463 {
 464         slap_overinst *on = glue_tool_inst( bi );
 465         glueinfo                *gi = on->on_bi.bi_private;
 466         static int glueOpened = 0;
 467         int i, rc = 0;
 468
 469         if (glueOpened) return 0;
 470
 471         glueOpened = 1;
 472
 473         /* If we were invoked in tool mode, open all the underlying backends */
 474         if (slapMode & SLAP_TOOL_MODE) {
 475                 rc = backend_startup( NULL );
 476         } /* other case is impossible */
 477         return rc;
 478 }
 479
 480 /* This function will only be called in tool mode */
 481 static int
 482 glue_close (
 483         BackendInfo *bi
 484 )
 485 {
 486         slap_overinst *on = glue_tool_inst( bi );
 487         glueinfo                *gi = on->on_bi.bi_private;
 488         static int glueClosed = 0;
 489         int i, rc = 0;
 490
 491         if (glueClosed) return 0;
 492
 493         glueClosed = 1;
 494
 495         if (slapMode & SLAP_TOOL_MODE) {
 496                 rc = backend_shutdown( NULL );
 497         }
 498         return rc;
 499 }
 500
 501 static int
 502 glue_entry_release_rw (
 503         Operation *op,
 504         Entry *e,
 505         int rw
 506 )
 507 {
 508         BackendDB *b0, b2;
 509         int rc;
 510
 511         b0 = op->o_bd;
 512         b2 = *op->o_bd;
 513         b2.bd_info = (BackendInfo *)glue_tool_inst( op->o_bd->bd_info );
 514         op->o_bd = glue_back_select (&b2, &e->e_nname);
 515
 516         rc = op->o_bd->be_release( op, e, rw );
 517         op->o_bd = b0;
 518         return rc;
 519 }
 520
 521 static ID
 522 glue_tool_entry_first (
 523         BackendDB *b0
 524 )
 525 {
 526         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 527         glueinfo                *gi = on->on_bi.bi_private;
 528         int i;
 529
 530         /* If we're starting from scratch, start at the most general */
 531         if (!glueBack) {
 532                 if ( toolDB.be_entry_open && toolDB.be_entry_first ) {
 533                         glueBack = &toolDB;
 534                 } else {
 535                         for (i = gi->gi_nodes-1; i >= 0; i--) {
 536                                 if (gi->gi_n[i].gn_be->be_entry_open &&
 537                                         gi->gi_n[i].gn_be->be_entry_first) {
 538                                                 glueBack = gi->gi_n[i].gn_be;
 539                                         break;
 540                                 }
 541                         }
 542                 }
 543         }
 544         if (!glueBack || !glueBack->be_entry_open || !glueBack->be_entry_first ||
 545                 glueBack->be_entry_open (glueBack, glueMode) != 0)
 546                 return NOID;
 547
 548         return glueBack->be_entry_first (glueBack);
 549 }
 550
 551 static ID
 552 glue_tool_entry_next (
 553         BackendDB *b0
 554 )
 555 {
 556         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 557         glueinfo                *gi = on->on_bi.bi_private;
 558         int i;
 559         ID rc;
 560
 561         if (!glueBack || !glueBack->be_entry_next)
 562                 return NOID;
 563
 564         rc = glueBack->be_entry_next (glueBack);
 565
 566         /* If we ran out of entries in one database, move on to the next */
 567         while (rc == NOID) {
 568                 if ( glueBack && glueBack->be_entry_close )
 569                         glueBack->be_entry_close (glueBack);
 570                 for (i=0; i<gi->gi_nodes; i++) {
 571                         if (gi->gi_n[i].gn_be == glueBack)
 572                                 break;
 573                 }
 574                 if (i == 0) {
 575                         glueBack = NULL;
 576                         break;
 577                 } else {
 578                         glueBack = gi->gi_n[i-1].gn_be;
 579                         rc = glue_tool_entry_first (b0);
 580                 }
 581         }
 582         return rc;
 583 }
 584
 585 static Entry *
 586 glue_tool_entry_get (
 587         BackendDB *b0,
 588         ID id
 589 )
 590 {
 591         if (!glueBack || !glueBack->be_entry_get)
 592                 return NULL;
 593
 594         return glueBack->be_entry_get (glueBack, id);
 595 }
 596
 597 static ID
 598 glue_tool_entry_put (
 599         BackendDB *b0,
 600         Entry *e,
 601         struct berval *text
 602 )
 603 {
 604         BackendDB *be, b2;
 605         int rc;
 606
 607         b2 = *b0;
 608         b2.bd_info = (BackendInfo *)glue_tool_inst( b0->bd_info );
 609         be = glue_back_select (&b2, &e->e_nname);
 610         if ( be == &b2 ) be = &toolDB;
 611
 612         if (!be->be_entry_put)
 613                 return NOID;
 614
 615         if (!glueBack) {
 616                 rc = be->be_entry_open (be, glueMode);
 617                 if (rc != 0)
 618                         return NOID;
 619         } else if (be != glueBack) {
 620                 /* If this entry belongs in a different branch than the
 621                  * previous one, close the current database and open the
 622                  * new one.
 623                  */
 624                 glueBack->be_entry_close (glueBack);
 625                 rc = be->be_entry_open (be, glueMode);
 626                 if (rc != 0)
 627                         return NOID;
 628         }
 629         glueBack = be;
 630         return be->be_entry_put (be, e, text);
 631 }
 632
 633 static int
 634 glue_tool_entry_reindex (
 635         BackendDB *b0,
 636         ID id
 637 )
 638 {
 639         if (!glueBack || !glueBack->be_entry_reindex)
 640                 return -1;
 641
 642         return glueBack->be_entry_reindex (glueBack, id);
 643 }
 644
 645 static int
 646 glue_tool_sync (
 647         BackendDB *b0
 648 )
 649 {
 650         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 651         glueinfo                *gi = on->on_bi.bi_private;
 652         BackendInfo             *bi = b0->bd_info;
 653         int i;
 654
 655         /* just sync everyone */
 656         for (i = 0; i<gi->gi_nodes; i++)
 657                 if (gi->gi_n[i].gn_be->be_sync)
 658                         gi->gi_n[i].gn_be->be_sync (gi->gi_n[i].gn_be);
 659         b0->bd_info = on->on_info->oi_orig;
 660         if ( b0->be_sync )
 661                 b0->be_sync( b0 );
 662         b0->bd_info = bi;
 663         return 0;
 664 }
 665
 666 static int
 667 glue_db_init(
 668         BackendDB *be
 669 )
 670 {
 671         slap_overinst   *on = (slap_overinst *)be->bd_info;
 672         slap_overinfo   *oi = on->on_info;
 673         glueinfo *gi;
 674
 675         gi = ch_calloc( 1, sizeof(glueinfo));
 676         on->on_bi.bi_private = gi;
 677         dnParent( be->be_nsuffix, &gi->gi_pdn );
 678
 679         /* Currently the overlay framework doesn't handle these entry points
 680          * but we need them....
 681          */
 682         oi->oi_bi.bi_open = glue_open;
 683         oi->oi_bi.bi_close = glue_close;
 684
 685         oi->oi_bi.bi_entry_release_rw = glue_entry_release_rw;
 686
 687         oi->oi_bi.bi_tool_entry_open = glue_tool_entry_open;
 688         oi->oi_bi.bi_tool_entry_close = glue_tool_entry_close;
 689         oi->oi_bi.bi_tool_entry_first = glue_tool_entry_first;
 690         oi->oi_bi.bi_tool_entry_next = glue_tool_entry_next;
 691         oi->oi_bi.bi_tool_entry_get = glue_tool_entry_get;
 692         oi->oi_bi.bi_tool_entry_put = glue_tool_entry_put;
 693         oi->oi_bi.bi_tool_entry_reindex = glue_tool_entry_reindex;
 694         oi->oi_bi.bi_tool_sync = glue_tool_sync;
 695
 696         /*FIXME : need to add support */
 697         oi->oi_bi.bi_tool_dn2id_get = 0;
 698         oi->oi_bi.bi_tool_id2entry_get = 0;
 699         oi->oi_bi.bi_tool_entry_modify = 0;
 700
 701         return 0;
 702 }
 703
 704 static int
 705 glue_db_destroy (
 706         BackendDB *be
 707 )
 708 {
 709         slap_overinst   *on = (slap_overinst *)be->bd_info;
 710         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 711
 712         free (gi);
 713         return SLAP_CB_CONTINUE;
 714 }
 715
 716 static int
 717 glue_db_open (
 718         BackendDB *be
 719 )
 720 {
 721         slap_overinst   *on = (slap_overinst *)be->bd_info;
 722         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 723         int i;
 724
 725         for ( i=0; i<gi->gi_nodes; i++ ) {
 726                 int j;
 727
 728                 gi->gi_n[i].gn_be = backendDB + gi->gi_n[i].gn_bx;
 729         }
 730         return 0;
 731 }
 732
 733 static int
 734 glue_db_close(
 735         BackendDB *be
 736 )
 737 {
 738         slap_overinst   *on = (slap_overinst *)be->bd_info;
 739
 740         on->on_info->oi_bi.bi_db_close = NULL;
 741         return 0;
 742 }
 743
 744 static int
 745 glue_db_config(
 746         BackendDB       *be,
 747         const char      *fname,
 748         int             lineno,
 749         int             argc,
 750         char    **argv
 751 )
 752 {
 753         slap_overinst   *on = (slap_overinst *)be->bd_info;
 754         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 755
 756         if ( strcasecmp( argv[0], "glue-sub" ) == 0 ) {
 757                 int async = 0;
 758                 BackendDB *b2;
 759                 struct berval bv, dn;
 760                 gluenode *gn;
 761
 762                 if ( argc < 2 ) {
 763                         fprintf( stderr, "%s: line %d: too few arguments in "
 764                                 "\"glue-sub <suffixDN> [async]\"\n", fname, lineno );
 765                         return -1;
 766                 }
 767                 if ( argc == 3 ) {
 768                         if ( strcasecmp( argv[2], "async" )) {
 769                                 fprintf( stderr, "%s: line %d: unrecognized option "
 770                                         "\"%s\" ignored.\n", fname, lineno, argv[2] );
 771                         } else {
 772                                 async = 1;
 773                         }
 774                 }
 775                 ber_str2bv( argv[1], 0, 0, &bv );
 776                 if ( dnNormalize( 0, NULL, NULL, &bv, &dn, NULL )) {
 777                         fprintf( stderr, "invalid suffixDN \"%s\"\n", argv[1] );
 778                         return -1;
 779                 }
 780                 b2 = select_backend( &dn, 0, 1 );
 781                 if ( !b2 ) {
 782                         fprintf( stderr, "%s: line %d: unknown suffix \"%s\"\n",
 783                                 fname, lineno, argv[1] );
 784                         return -1;
 785                 }
 786                 SLAP_DBFLAGS(b2) |= SLAP_DBFLAG_GLUE_SUBORDINATE;
 787                 gi = (glueinfo *)ch_realloc( gi, sizeof(glueinfo) +
 788                         gi->gi_nodes * sizeof(gluenode));
 789                 gi->gi_n[gi->gi_nodes].gn_bx = b2 - backendDB;
 790                 dnParent( &b2->be_nsuffix[0], &gi->gi_n[gi->gi_nodes].gn_pdn );
 791                 gi->gi_n[gi->gi_nodes].gn_async = async;
 792                 gi->gi_nodes++;
 793                 on->on_bi.bi_private = gi;
 794                 return 0;
 795         }
 796         return SLAP_CONF_UNKNOWN;
 797 }
 798
 799 int
 800 glue_init()
 801 {
 802         glue.on_bi.bi_type = "glue";
 803
 804         glue.on_bi.bi_db_init = glue_db_init;
 805         glue.on_bi.bi_db_config = glue_db_config;
 806         glue.on_bi.bi_db_open = glue_db_open;
 807         glue.on_bi.bi_db_close = glue_db_close;
 808         glue.on_bi.bi_db_destroy = glue_db_destroy;
 809
 810         glue.on_bi.bi_op_search = glue_op_search;
 811         glue.on_bi.bi_op_modify = glue_op_func;
 812         glue.on_bi.bi_op_modrdn = glue_op_func;
 813         glue.on_bi.bi_op_add = glue_op_func;
 814         glue.on_bi.bi_op_delete = glue_op_func;
 815
 816         glue.on_bi.bi_chk_referrals = glue_chk_referrals;
 817         glue.on_bi.bi_chk_controls = glue_chk_controls;
 818
 819         return overlay_register( &glue );
 820 }
 821
 822 #if SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC
 823 int
 824 init_module( int argc, char *argv[] )
 825 {
 826         return glue_init();
 827 }
 828 #endif  /* SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC */
 829
 830 #endif  /* defined(SLAPD_OVER_GLUE */