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 = SLAP_CB_CONTINUE;
 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 the subordinate database has overlays, the bi_chk_controls()
 231          * hook is actually over_aux_chk_controls(); in case it actually
 232          * wraps a missing hok, we need to mimic the behavior
 233          * of the frontend applied to that database */
 234         if ( op->o_bd->bd_info->bi_chk_controls ) {
 235                 rc = ( *op->o_bd->bd_info->bi_chk_controls )( op, rs );
 236         }
 237
 238
 239         if ( rc == SLAP_CB_CONTINUE ) {
 240                 rc = backend_check_controls( op, rs );
 241         }
 242
 243         op->o_bd = b0;
 244         op->o_bd->bd_info = bi0;
 245         return rc;
 246 }
 247
 248 static int
 249 glue_op_search ( Operation *op, SlapReply *rs )
 250 {
 251         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 252         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 253         BackendDB *b0 = op->o_bd;
 254         BackendDB *b1 = NULL, *btmp;
 255         BackendInfo *bi0 = op->o_bd->bd_info;
 256         int i;
 257         long stoptime = 0;
 258         glue_state gs = {0, 0, 0, NULL, 0, NULL};
 259         slap_callback cb = { NULL, glue_op_response, NULL, NULL };
 260         int scope0, slimit0, tlimit0;
 261         struct berval dn, ndn, *pdn;
 262
 263         cb.sc_private = &gs;
 264
 265         cb.sc_next = op->o_callback;
 266
 267         stoptime = slap_get_time () + op->ors_tlimit;
 268
 269         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 270         b0->bd_info = on->on_info->oi_orig;
 271
 272         switch (op->ors_scope) {
 273         case LDAP_SCOPE_BASE:
 274                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 275                 if (op->o_bd && op->o_bd->be_search) {
 276                         rs->sr_err = op->o_bd->be_search( op, rs );
 277                 }
 278                 return rs->sr_err;
 279
 280         case LDAP_SCOPE_ONELEVEL:
 281         case LDAP_SCOPE_SUBTREE:
 282 #ifdef LDAP_SCOPE_SUBORDINATE
 283         case LDAP_SCOPE_SUBORDINATE: /* FIXME */
 284 #endif
 285
 286 #if 0
 287                 if ( op->o_sync ) {
 288                         if (op->o_bd && op->o_bd->be_search) {
 289                                 rs->sr_err = op->o_bd->be_search( op, rs );
 290                         } else {
 291                                 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
 292                                                 "No search target found");
 293                         }
 294                         return rs->sr_err;
 295                 }
 296 #endif
 297
 298                 op->o_callback = &cb;
 299                 rs->sr_err = gs.err = LDAP_UNWILLING_TO_PERFORM;
 300                 scope0 = op->ors_scope;
 301                 slimit0 = gs.slimit = op->ors_slimit;
 302                 tlimit0 = op->ors_tlimit;
 303                 dn = op->o_req_dn;
 304                 ndn = op->o_req_ndn;
 305                 b1 = op->o_bd;
 306
 307                 /*
 308                  * Execute in reverse order, most general first
 309                  */
 310                 for (i = gi->gi_nodes; i >= 0; i--) {
 311                         if ( i == gi->gi_nodes ) {
 312                                 btmp = b0;
 313                                 pdn = &gi->gi_pdn;
 314                         } else {
 315                                 btmp = gi->gi_n[i].gn_be;
 316                                 pdn = &gi->gi_n[i].gn_pdn;
 317                         }
 318                         if (!btmp || !btmp->be_search)
 319                                 continue;
 320                         if (!dnIsSuffix(&btmp->be_nsuffix[0], &b1->be_nsuffix[0]))
 321                                 continue;
 322                         if (tlimit0 != SLAP_NO_LIMIT) {
 323                                 op->ors_tlimit = stoptime - slap_get_time ();
 324                                 if (op->ors_tlimit <= 0) {
 325                                         rs->sr_err = gs.err = LDAP_TIMELIMIT_EXCEEDED;
 326                                         break;
 327                                 }
 328                         }
 329                         if (slimit0 != SLAP_NO_LIMIT) {
 330                                 op->ors_slimit = slimit0 - rs->sr_nentries;
 331                                 if (op->ors_slimit < 0) {
 332                                         rs->sr_err = gs.err = LDAP_SIZELIMIT_EXCEEDED;
 333                                         break;
 334                                 }
 335                         }
 336                         rs->sr_err = 0;
 337                         /*
 338                          * check for abandon
 339                          */
 340                         if (op->o_abandon) {
 341                                 goto end_of_loop;
 342                         }
 343                         op->o_bd = btmp;
 344
 345                         assert( op->o_bd->be_suffix );
 346                         assert( op->o_bd->be_nsuffix );
 347
 348                         if (scope0 == LDAP_SCOPE_ONELEVEL &&
 349                                 dn_match(pdn, &ndn))
 350                         {
 351                                 op->ors_scope = LDAP_SCOPE_BASE;
 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
 356                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 357                                 dn_match(&op->o_bd->be_nsuffix[0], &ndn))
 358                         {
 359                                 rs->sr_err = op->o_bd->be_search( op, rs );
 360
 361                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 362                                 dnIsSuffix(&op->o_bd->be_nsuffix[0], &ndn))
 363                         {
 364                                 op->o_req_dn = op->o_bd->be_suffix[0];
 365                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 366                                 rs->sr_err = op->o_bd->be_search( op, rs );
 367                                 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
 368                                         gs.err = LDAP_SUCCESS;
 369                                 }
 370
 371                         } else if (dnIsSuffix(&ndn, &op->o_bd->be_nsuffix[0])) {
 372                                 rs->sr_err = op->o_bd->be_search( op, rs );
 373                         }
 374
 375                         switch ( gs.err ) {
 376
 377                         /*
 378                          * Add errors that should result in dropping
 379                          * the search
 380                          */
 381                         case LDAP_SIZELIMIT_EXCEEDED:
 382                         case LDAP_TIMELIMIT_EXCEEDED:
 383                         case LDAP_ADMINLIMIT_EXCEEDED:
 384                         case LDAP_NO_SUCH_OBJECT:
 385 #ifdef LDAP_CONTROL_X_CHAINING_BEHAVIOR
 386                         case LDAP_CANNOT_CHAIN:
 387 #endif /* LDAP_CONTROL_X_CHAINING_BEHAVIOR */
 388                                 goto end_of_loop;
 389
 390                         default:
 391                                 break;
 392                         }
 393                 }
 394 end_of_loop:;
 395                 op->ors_scope = scope0;
 396                 op->ors_slimit = slimit0;
 397                 op->ors_tlimit = tlimit0;
 398                 op->o_req_dn = dn;
 399                 op->o_req_ndn = ndn;
 400
 401                 break;
 402         }
 403         if ( op->o_abandon ) {
 404                 rs->sr_err = SLAPD_ABANDON;
 405         } else {
 406                 op->o_callback = cb.sc_next;
 407                 rs->sr_err = gs.err;
 408                 rs->sr_matched = gs.matched;
 409                 rs->sr_ref = gs.refs;
 410
 411                 send_ldap_result( op, rs );
 412         }
 413
 414         op->o_bd = b0;
 415         op->o_bd->bd_info = bi0;
 416         if (gs.matched)
 417                 free (gs.matched);
 418         if (gs.refs)
 419                 ber_bvarray_free(gs.refs);
 420         return rs->sr_err;
 421 }
 422
 423 static BackendDB toolDB;
 424
 425 static int
 426 glue_tool_entry_open (
 427         BackendDB *b0,
 428         int mode
 429 )
 430 {
 431         slap_overinfo   *oi = (slap_overinfo *)b0->bd_info;
 432
 433         /* We don't know which backend to talk to yet, so just
 434          * remember the mode and move on...
 435          */
 436
 437         glueMode = mode;
 438         glueBack = NULL;
 439         toolDB = *b0;
 440         toolDB.bd_info = oi->oi_orig;
 441
 442         return 0;
 443 }
 444
 445 static int
 446 glue_tool_entry_close (
 447         BackendDB *b0
 448 )
 449 {
 450         int rc = 0;
 451
 452         if (glueBack) {
 453                 if (!glueBack->be_entry_close)
 454                         return 0;
 455                 rc = glueBack->be_entry_close (glueBack);
 456         }
 457         return rc;
 458 }
 459
 460 static slap_overinst *
 461 glue_tool_inst(
 462         BackendInfo *bi
 463 )
 464 {
 465         slap_overinfo   *oi = (slap_overinfo *)bi;
 466         slap_overinst   *on;
 467
 468         for ( on = oi->oi_list; on; on=on->on_next ) {
 469                 if ( !strcmp( on->on_bi.bi_type, glue.on_bi.bi_type ))
 470                         return on;
 471         }
 472         return NULL;
 473 }
 474
 475 /* This function will only be called in tool mode */
 476 static int
 477 glue_open (
 478         BackendInfo *bi
 479 )
 480 {
 481         slap_overinst *on = glue_tool_inst( bi );
 482         glueinfo                *gi = on->on_bi.bi_private;
 483         static int glueOpened = 0;
 484         int i, rc = 0;
 485
 486         if (glueOpened) return 0;
 487
 488         glueOpened = 1;
 489
 490         /* If we were invoked in tool mode, open all the underlying backends */
 491         if (slapMode & SLAP_TOOL_MODE) {
 492                 rc = backend_startup( NULL );
 493         } /* other case is impossible */
 494         return rc;
 495 }
 496
 497 /* This function will only be called in tool mode */
 498 static int
 499 glue_close (
 500         BackendInfo *bi
 501 )
 502 {
 503         slap_overinst *on = glue_tool_inst( bi );
 504         glueinfo                *gi = on->on_bi.bi_private;
 505         static int glueClosed = 0;
 506         int i, rc = 0;
 507
 508         if (glueClosed) return 0;
 509
 510         glueClosed = 1;
 511
 512         if (slapMode & SLAP_TOOL_MODE) {
 513                 rc = backend_shutdown( NULL );
 514         }
 515         return rc;
 516 }
 517
 518 static int
 519 glue_entry_release_rw (
 520         Operation *op,
 521         Entry *e,
 522         int rw
 523 )
 524 {
 525         BackendDB *b0, b2;
 526         int rc;
 527
 528         b0 = op->o_bd;
 529         b2 = *op->o_bd;
 530         b2.bd_info = (BackendInfo *)glue_tool_inst( op->o_bd->bd_info );
 531         op->o_bd = glue_back_select (&b2, &e->e_nname);
 532
 533         rc = op->o_bd->be_release( op, e, rw );
 534         op->o_bd = b0;
 535         return rc;
 536 }
 537
 538 static ID
 539 glue_tool_entry_first (
 540         BackendDB *b0
 541 )
 542 {
 543         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 544         glueinfo                *gi = on->on_bi.bi_private;
 545         int i;
 546
 547         /* If we're starting from scratch, start at the most general */
 548         if (!glueBack) {
 549                 if ( toolDB.be_entry_open && toolDB.be_entry_first ) {
 550                         glueBack = &toolDB;
 551                 } else {
 552                         for (i = gi->gi_nodes-1; i >= 0; i--) {
 553                                 if (gi->gi_n[i].gn_be->be_entry_open &&
 554                                         gi->gi_n[i].gn_be->be_entry_first) {
 555                                                 glueBack = gi->gi_n[i].gn_be;
 556                                         break;
 557                                 }
 558                         }
 559                 }
 560         }
 561         if (!glueBack || !glueBack->be_entry_open || !glueBack->be_entry_first ||
 562                 glueBack->be_entry_open (glueBack, glueMode) != 0)
 563                 return NOID;
 564
 565         return glueBack->be_entry_first (glueBack);
 566 }
 567
 568 static ID
 569 glue_tool_entry_next (
 570         BackendDB *b0
 571 )
 572 {
 573         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 574         glueinfo                *gi = on->on_bi.bi_private;
 575         int i;
 576         ID rc;
 577
 578         if (!glueBack || !glueBack->be_entry_next)
 579                 return NOID;
 580
 581         rc = glueBack->be_entry_next (glueBack);
 582
 583         /* If we ran out of entries in one database, move on to the next */
 584         while (rc == NOID) {
 585                 if ( glueBack && glueBack->be_entry_close )
 586                         glueBack->be_entry_close (glueBack);
 587                 for (i=0; i<gi->gi_nodes; i++) {
 588                         if (gi->gi_n[i].gn_be == glueBack)
 589                                 break;
 590                 }
 591                 if (i == 0) {
 592                         glueBack = NULL;
 593                         break;
 594                 } else {
 595                         glueBack = gi->gi_n[i-1].gn_be;
 596                         rc = glue_tool_entry_first (b0);
 597                 }
 598         }
 599         return rc;
 600 }
 601
 602 static Entry *
 603 glue_tool_entry_get (
 604         BackendDB *b0,
 605         ID id
 606 )
 607 {
 608         if (!glueBack || !glueBack->be_entry_get)
 609                 return NULL;
 610
 611         return glueBack->be_entry_get (glueBack, id);
 612 }
 613
 614 static ID
 615 glue_tool_entry_put (
 616         BackendDB *b0,
 617         Entry *e,
 618         struct berval *text
 619 )
 620 {
 621         BackendDB *be, b2;
 622         int rc;
 623
 624         b2 = *b0;
 625         b2.bd_info = (BackendInfo *)glue_tool_inst( b0->bd_info );
 626         be = glue_back_select (&b2, &e->e_nname);
 627         if ( be == &b2 ) be = &toolDB;
 628
 629         if (!be->be_entry_put)
 630                 return NOID;
 631
 632         if (!glueBack) {
 633                 rc = be->be_entry_open (be, glueMode);
 634                 if (rc != 0)
 635                         return NOID;
 636         } else if (be != glueBack) {
 637                 /* If this entry belongs in a different branch than the
 638                  * previous one, close the current database and open the
 639                  * new one.
 640                  */
 641                 glueBack->be_entry_close (glueBack);
 642                 rc = be->be_entry_open (be, glueMode);
 643                 if (rc != 0)
 644                         return NOID;
 645         }
 646         glueBack = be;
 647         return be->be_entry_put (be, e, text);
 648 }
 649
 650 static int
 651 glue_tool_entry_reindex (
 652         BackendDB *b0,
 653         ID id
 654 )
 655 {
 656         if (!glueBack || !glueBack->be_entry_reindex)
 657                 return -1;
 658
 659         return glueBack->be_entry_reindex (glueBack, id);
 660 }
 661
 662 static int
 663 glue_tool_sync (
 664         BackendDB *b0
 665 )
 666 {
 667         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 668         glueinfo                *gi = on->on_bi.bi_private;
 669         BackendInfo             *bi = b0->bd_info;
 670         int i;
 671
 672         /* just sync everyone */
 673         for (i = 0; i<gi->gi_nodes; i++)
 674                 if (gi->gi_n[i].gn_be->be_sync)
 675                         gi->gi_n[i].gn_be->be_sync (gi->gi_n[i].gn_be);
 676         b0->bd_info = on->on_info->oi_orig;
 677         if ( b0->be_sync )
 678                 b0->be_sync( b0 );
 679         b0->bd_info = bi;
 680         return 0;
 681 }
 682
 683 static int
 684 glue_db_init(
 685         BackendDB *be
 686 )
 687 {
 688         slap_overinst   *on = (slap_overinst *)be->bd_info;
 689         slap_overinfo   *oi = on->on_info;
 690         glueinfo *gi;
 691
 692         gi = ch_calloc( 1, sizeof(glueinfo));
 693         on->on_bi.bi_private = gi;
 694         dnParent( be->be_nsuffix, &gi->gi_pdn );
 695
 696         /* Currently the overlay framework doesn't handle these entry points
 697          * but we need them....
 698          */
 699         oi->oi_bi.bi_open = glue_open;
 700         oi->oi_bi.bi_close = glue_close;
 701
 702         oi->oi_bi.bi_entry_release_rw = glue_entry_release_rw;
 703
 704         oi->oi_bi.bi_tool_entry_open = glue_tool_entry_open;
 705         oi->oi_bi.bi_tool_entry_close = glue_tool_entry_close;
 706         oi->oi_bi.bi_tool_entry_first = glue_tool_entry_first;
 707         oi->oi_bi.bi_tool_entry_next = glue_tool_entry_next;
 708         oi->oi_bi.bi_tool_entry_get = glue_tool_entry_get;
 709         oi->oi_bi.bi_tool_entry_put = glue_tool_entry_put;
 710         oi->oi_bi.bi_tool_entry_reindex = glue_tool_entry_reindex;
 711         oi->oi_bi.bi_tool_sync = glue_tool_sync;
 712
 713         /*FIXME : need to add support */
 714         oi->oi_bi.bi_tool_dn2id_get = 0;
 715         oi->oi_bi.bi_tool_id2entry_get = 0;
 716         oi->oi_bi.bi_tool_entry_modify = 0;
 717
 718         return 0;
 719 }
 720
 721 static int
 722 glue_db_destroy (
 723         BackendDB *be
 724 )
 725 {
 726         slap_overinst   *on = (slap_overinst *)be->bd_info;
 727         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 728
 729         free (gi);
 730         return SLAP_CB_CONTINUE;
 731 }
 732
 733 static int
 734 glue_db_open (
 735         BackendDB *be
 736 )
 737 {
 738         slap_overinst   *on = (slap_overinst *)be->bd_info;
 739         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 740         int i;
 741
 742         for ( i=0; i<gi->gi_nodes; i++ ) {
 743                 int j;
 744
 745                 gi->gi_n[i].gn_be = backendDB + gi->gi_n[i].gn_bx;
 746         }
 747         return 0;
 748 }
 749
 750 static int
 751 glue_db_close(
 752         BackendDB *be
 753 )
 754 {
 755         slap_overinst   *on = (slap_overinst *)be->bd_info;
 756
 757         on->on_info->oi_bi.bi_db_close = NULL;
 758         return 0;
 759 }
 760
 761 static int
 762 glue_db_config(
 763         BackendDB       *be,
 764         const char      *fname,
 765         int             lineno,
 766         int             argc,
 767         char    **argv
 768 )
 769 {
 770         slap_overinst   *on = (slap_overinst *)be->bd_info;
 771         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 772
 773         /* redundant; could be applied just once */
 774         SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLUE_INSTANCE;
 775
 776         if ( strcasecmp( argv[0], "glue-sub" ) == 0 ) {
 777                 int i, async = 0, advertise = 0;
 778                 BackendDB *b2;
 779                 struct berval bv, dn;
 780                 gluenode *gn;
 781
 782                 if ( argc < 2 ) {
 783                         fprintf( stderr, "%s: line %d: too few arguments in "
 784                                 "\"glue-sub <suffixDN> [async] [advertise]\"\n", fname, lineno );
 785                         return -1;
 786                 }
 787                 for ( i = 2; i < argc; i++ ) {
 788                         if ( strcasecmp( argv[i], "async" ) == 0 ) {
 789                                 async = 1;
 790
 791                         } else if ( strcasecmp( argv[i], "advertise" ) == 0 ) {
 792                                 advertise = 1;
 793
 794                         } else {
 795                                 fprintf( stderr, "%s: line %d: unrecognized option "
 796                                         "\"%s\" ignored.\n", fname, lineno, argv[i] );
 797                         }
 798                 }
 799                 ber_str2bv( argv[1], 0, 0, &bv );
 800                 if ( dnNormalize( 0, NULL, NULL, &bv, &dn, NULL )) {
 801                         fprintf( stderr, "invalid suffixDN \"%s\"\n", argv[1] );
 802                         return -1;
 803                 }
 804                 b2 = select_backend( &dn, 0, 1 );
 805                 if ( !b2 ) {
 806                         fprintf( stderr, "%s: line %d: unknown suffix \"%s\"\n",
 807                                 fname, lineno, argv[1] );
 808                         return -1;
 809                 }
 810                 SLAP_DBFLAGS(b2) |= SLAP_DBFLAG_GLUE_SUBORDINATE;
 811                 if ( advertise ) {
 812                         SLAP_DBFLAGS(b2) |= SLAP_DBFLAG_GLUE_ADVERTISE;
 813                 }
 814                 gi = (glueinfo *)ch_realloc( gi, sizeof(glueinfo) +
 815                         gi->gi_nodes * sizeof(gluenode));
 816                 gi->gi_n[gi->gi_nodes].gn_bx = b2 - backendDB;
 817                 dnParent( &b2->be_nsuffix[0], &gi->gi_n[gi->gi_nodes].gn_pdn );
 818                 gi->gi_n[gi->gi_nodes].gn_async = async;
 819                 gi->gi_nodes++;
 820                 on->on_bi.bi_private = gi;
 821                 return 0;
 822         }
 823         return SLAP_CONF_UNKNOWN;
 824 }
 825
 826 int
 827 glue_init()
 828 {
 829         glue.on_bi.bi_type = "glue";
 830
 831         glue.on_bi.bi_db_init = glue_db_init;
 832         glue.on_bi.bi_db_config = glue_db_config;
 833         glue.on_bi.bi_db_open = glue_db_open;
 834         glue.on_bi.bi_db_close = glue_db_close;
 835         glue.on_bi.bi_db_destroy = glue_db_destroy;
 836
 837         glue.on_bi.bi_op_search = glue_op_search;
 838         glue.on_bi.bi_op_modify = glue_op_func;
 839         glue.on_bi.bi_op_modrdn = glue_op_func;
 840         glue.on_bi.bi_op_add = glue_op_func;
 841         glue.on_bi.bi_op_delete = glue_op_func;
 842
 843         glue.on_bi.bi_chk_referrals = glue_chk_referrals;
 844         glue.on_bi.bi_chk_controls = glue_chk_controls;
 845
 846         return overlay_register( &glue );
 847 }
 848
 849 #if SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC
 850 int
 851 init_module( int argc, char *argv[] )
 852 {
 853         return glue_init();
 854 }
 855 #endif  /* SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC */
 856
 857 #endif  /* defined(SLAPD_OVER_GLUE */