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         struct berval gn_pdn;
  44         int gn_async;
  45 } gluenode;
  46
  47 typedef struct glueinfo {
  48         int gi_nodes;
  49         struct berval gi_pdn;
  50         gluenode gi_n[1];
  51 } glueinfo;
  52
  53 static slap_overinst    glue;
  54
  55 static int glueMode;
  56 static BackendDB *glueBack;
  57
  58 static slap_response glue_op_response;
  59
  60 /* Just like select_backend, but only for our backends */
  61 static BackendDB *
  62 glue_back_select (
  63         BackendDB *be,
  64         struct berval *dn
  65 )
  66 {
  67         slap_overinst   *on = (slap_overinst *)be->bd_info;
  68         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
  69         int i;
  70
  71         for (i = 0; i<gi->gi_nodes; i++) {
  72                 assert( gi->gi_n[i].gn_be->be_nsuffix );
  73
  74                 if (dnIsSuffix(dn, &gi->gi_n[i].gn_be->be_nsuffix[0])) {
  75                         return gi->gi_n[i].gn_be;
  76                 }
  77         }
  78         be->bd_info = on->on_info->oi_orig;
  79         return be;
  80 }
  81
  82
  83 typedef struct glue_state {
  84         int err;
  85         int slimit;
  86         int matchlen;
  87         char *matched;
  88         int nrefs;
  89         BerVarray refs;
  90 } glue_state;
  91
  92 static int
  93 glue_op_response ( Operation *op, SlapReply *rs )
  94 {
  95         glue_state *gs = op->o_callback->sc_private;
  96
  97         switch(rs->sr_type) {
  98         case REP_SEARCH:
  99                 if ( gs->slimit != SLAP_NO_LIMIT
 100                                 && rs->sr_nentries >= gs->slimit )
 101                 {
 102                         rs->sr_err = gs->err = LDAP_SIZELIMIT_EXCEEDED;
 103                         return -1;
 104                 }
 105                 /* fallthru */
 106         case REP_SEARCHREF:
 107                 return SLAP_CB_CONTINUE;
 108
 109         default:
 110                 if (rs->sr_err == LDAP_SUCCESS ||
 111                         rs->sr_err == LDAP_SIZELIMIT_EXCEEDED ||
 112                         rs->sr_err == LDAP_TIMELIMIT_EXCEEDED ||
 113                         rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 114                         rs->sr_err == LDAP_NO_SUCH_OBJECT ||
 115                         gs->err != LDAP_SUCCESS)
 116                         gs->err = rs->sr_err;
 117                 if (gs->err == LDAP_SUCCESS && gs->matched) {
 118                         ch_free (gs->matched);
 119                         gs->matched = NULL;
 120                         gs->matchlen = 0;
 121                 }
 122                 if (gs->err != LDAP_SUCCESS && rs->sr_matched) {
 123                         int len;
 124                         len = strlen (rs->sr_matched);
 125                         if (len > gs->matchlen) {
 126                                 if (gs->matched)
 127                                         ch_free (gs->matched);
 128                                 gs->matched = ch_strdup (rs->sr_matched);
 129                                 gs->matchlen = len;
 130                         }
 131                 }
 132                 if (rs->sr_ref) {
 133                         int i, j, k;
 134                         BerVarray new;
 135
 136                         for (i=0; rs->sr_ref[i].bv_val; i++);
 137
 138                         j = gs->nrefs;
 139                         if (!j) {
 140                                 new = ch_malloc ((i+1)*sizeof(struct berval));
 141                         } else {
 142                                 new = ch_realloc(gs->refs,
 143                                         (j+i+1)*sizeof(struct berval));
 144                         }
 145                         for (k=0; k<i; j++,k++) {
 146                                 ber_dupbv( &new[j], &rs->sr_ref[k] );
 147                         }
 148                         new[j].bv_val = NULL;
 149                         gs->nrefs = j;
 150                         gs->refs = new;
 151                 }
 152         }
 153         return 0;
 154 }
 155
 156 enum glue_which {
 157         op_modify = 0,
 158         op_modrdn,
 159         op_add,
 160         op_delete
 161 };
 162
 163 static int
 164 glue_op_func ( Operation *op, SlapReply *rs )
 165 {
 166         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 167         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 168         BackendDB *b0 = op->o_bd;
 169         BackendInfo *bi0 = op->o_bd->bd_info;
 170         BI_op_modify **func;
 171         enum glue_which which;
 172         int rc;
 173
 174         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 175         b0->bd_info = on->on_info->oi_orig;
 176
 177         switch(op->o_tag) {
 178         case LDAP_REQ_ADD: which = op_add; break;
 179         case LDAP_REQ_DELETE: which = op_delete; break;
 180         case LDAP_REQ_MODIFY: which = op_modify; break;
 181         case LDAP_REQ_MODRDN: which = op_modrdn; break;
 182         }
 183
 184         func = &op->o_bd->bd_info->bi_op_modify;
 185         if ( func[which] )
 186                 rc = func[which]( op, rs );
 187         else
 188                 rc = SLAP_CB_CONTINUE;
 189
 190         op->o_bd = b0;
 191         op->o_bd->bd_info = bi0;
 192         return rc;
 193 }
 194
 195 static int
 196 glue_chk_referrals ( Operation *op, SlapReply *rs )
 197 {
 198         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 199         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 200         BackendDB *b0 = op->o_bd;
 201         BackendInfo *bi0 = op->o_bd->bd_info;
 202         int rc;
 203
 204         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 205         b0->bd_info = on->on_info->oi_orig;
 206
 207         if ( op->o_bd->bd_info->bi_chk_referrals )
 208                 rc = ( *op->o_bd->bd_info->bi_chk_referrals )( op, rs );
 209         else
 210                 rc = SLAP_CB_CONTINUE;
 211
 212         op->o_bd = b0;
 213         op->o_bd->bd_info = bi0;
 214         return rc;
 215 }
 216
 217 static int
 218 glue_chk_controls ( Operation *op, SlapReply *rs )
 219 {
 220         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 221         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 222         BackendDB *b0 = op->o_bd;
 223         BackendInfo *bi0 = op->o_bd->bd_info;
 224         int rc = SLAP_CB_CONTINUE;
 225
 226         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 227         b0->bd_info = on->on_info->oi_orig;
 228
 229         /* if the subordinate database has overlays, the bi_chk_controls()
 230          * hook is actually over_aux_chk_controls(); in case it actually
 231          * wraps a missing hok, we need to mimic the behavior
 232          * of the frontend applied to that database */
 233         if ( op->o_bd->bd_info->bi_chk_controls ) {
 234                 rc = ( *op->o_bd->bd_info->bi_chk_controls )( op, rs );
 235         }
 236
 237
 238         if ( rc == SLAP_CB_CONTINUE ) {
 239                 rc = backend_check_controls( op, rs );
 240         }
 241
 242         op->o_bd = b0;
 243         op->o_bd->bd_info = bi0;
 244         return rc;
 245 }
 246
 247 static int
 248 glue_op_search ( Operation *op, SlapReply *rs )
 249 {
 250         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 251         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 252         BackendDB *b0 = op->o_bd;
 253         BackendDB *b1 = NULL, *btmp;
 254         BackendInfo *bi0 = op->o_bd->bd_info;
 255         int i;
 256         long stoptime = 0;
 257         glue_state gs = {0, 0, 0, NULL, 0, NULL};
 258         slap_callback cb = { NULL, glue_op_response, NULL, NULL };
 259         int scope0, slimit0, tlimit0;
 260         struct berval dn, ndn, *pdn;
 261
 262         cb.sc_private = &gs;
 263
 264         cb.sc_next = op->o_callback;
 265
 266         stoptime = slap_get_time () + op->ors_tlimit;
 267
 268         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 269         b0->bd_info = on->on_info->oi_orig;
 270
 271         switch (op->ors_scope) {
 272         case LDAP_SCOPE_BASE:
 273                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 274                 if (op->o_bd && op->o_bd->be_search) {
 275                         rs->sr_err = op->o_bd->be_search( op, rs );
 276                 }
 277                 return rs->sr_err;
 278
 279         case LDAP_SCOPE_ONELEVEL:
 280         case LDAP_SCOPE_SUBTREE:
 281 #ifdef LDAP_SCOPE_SUBORDINATE
 282         case LDAP_SCOPE_SUBORDINATE: /* FIXME */
 283 #endif
 284
 285 #if 0
 286                 if ( op->o_sync ) {
 287                         if (op->o_bd && op->o_bd->be_search) {
 288                                 rs->sr_err = op->o_bd->be_search( op, rs );
 289                         } else {
 290                                 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
 291                                                 "No search target found");
 292                         }
 293                         return rs->sr_err;
 294                 }
 295 #endif
 296
 297                 op->o_callback = &cb;
 298                 rs->sr_err = gs.err = LDAP_UNWILLING_TO_PERFORM;
 299                 scope0 = op->ors_scope;
 300                 slimit0 = gs.slimit = op->ors_slimit;
 301                 tlimit0 = op->ors_tlimit;
 302                 dn = op->o_req_dn;
 303                 ndn = op->o_req_ndn;
 304                 b1 = op->o_bd;
 305
 306                 /*
 307                  * Execute in reverse order, most general first
 308                  */
 309                 for (i = gi->gi_nodes; i >= 0; i--) {
 310                         if ( i == gi->gi_nodes ) {
 311                                 btmp = b0;
 312                                 pdn = &gi->gi_pdn;
 313                         } else {
 314                                 btmp = gi->gi_n[i].gn_be;
 315                                 pdn = &gi->gi_n[i].gn_pdn;
 316                         }
 317                         if (!btmp || !btmp->be_search)
 318                                 continue;
 319                         if (!dnIsSuffix(&btmp->be_nsuffix[0], &b1->be_nsuffix[0]))
 320                                 continue;
 321                         if (tlimit0 != SLAP_NO_LIMIT) {
 322                                 op->ors_tlimit = stoptime - slap_get_time ();
 323                                 if (op->ors_tlimit <= 0) {
 324                                         rs->sr_err = gs.err = LDAP_TIMELIMIT_EXCEEDED;
 325                                         break;
 326                                 }
 327                         }
 328                         if (slimit0 != SLAP_NO_LIMIT) {
 329                                 op->ors_slimit = slimit0 - rs->sr_nentries;
 330                                 if (op->ors_slimit < 0) {
 331                                         rs->sr_err = gs.err = LDAP_SIZELIMIT_EXCEEDED;
 332                                         break;
 333                                 }
 334                         }
 335                         rs->sr_err = 0;
 336                         /*
 337                          * check for abandon
 338                          */
 339                         if (op->o_abandon) {
 340                                 goto end_of_loop;
 341                         }
 342                         op->o_bd = btmp;
 343
 344                         assert( op->o_bd->be_suffix );
 345                         assert( op->o_bd->be_nsuffix );
 346
 347                         if (scope0 == LDAP_SCOPE_ONELEVEL &&
 348                                 dn_match(pdn, &ndn))
 349                         {
 350                                 op->ors_scope = LDAP_SCOPE_BASE;
 351                                 op->o_req_dn = op->o_bd->be_suffix[0];
 352                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 353                                 rs->sr_err = op->o_bd->be_search(op, rs);
 354
 355                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 356                                 dn_match(&op->o_bd->be_nsuffix[0], &ndn))
 357                         {
 358                                 rs->sr_err = op->o_bd->be_search( op, rs );
 359
 360                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 361                                 dnIsSuffix(&op->o_bd->be_nsuffix[0], &ndn))
 362                         {
 363                                 op->o_req_dn = op->o_bd->be_suffix[0];
 364                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 365                                 rs->sr_err = op->o_bd->be_search( op, rs );
 366                                 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
 367                                         gs.err = LDAP_SUCCESS;
 368                                 }
 369
 370                         } else if (dnIsSuffix(&ndn, &op->o_bd->be_nsuffix[0])) {
 371                                 rs->sr_err = op->o_bd->be_search( op, rs );
 372                         }
 373
 374                         switch ( gs.err ) {
 375
 376                         /*
 377                          * Add errors that should result in dropping
 378                          * the search
 379                          */
 380                         case LDAP_SIZELIMIT_EXCEEDED:
 381                         case LDAP_TIMELIMIT_EXCEEDED:
 382                         case LDAP_ADMINLIMIT_EXCEEDED:
 383                         case LDAP_NO_SUCH_OBJECT:
 384 #ifdef LDAP_CONTROL_X_CHAINING_BEHAVIOR
 385                         case LDAP_CANNOT_CHAIN:
 386 #endif /* LDAP_CONTROL_X_CHAINING_BEHAVIOR */
 387                                 goto end_of_loop;
 388
 389                         default:
 390                                 break;
 391                         }
 392                 }
 393 end_of_loop:;
 394                 op->ors_scope = scope0;
 395                 op->ors_slimit = slimit0;
 396                 op->ors_tlimit = tlimit0;
 397                 op->o_req_dn = dn;
 398                 op->o_req_ndn = ndn;
 399
 400                 break;
 401         }
 402         if ( op->o_abandon ) {
 403                 rs->sr_err = SLAPD_ABANDON;
 404         } else {
 405                 op->o_callback = cb.sc_next;
 406                 rs->sr_err = gs.err;
 407                 rs->sr_matched = gs.matched;
 408                 rs->sr_ref = gs.refs;
 409
 410                 send_ldap_result( op, rs );
 411         }
 412
 413         op->o_bd = b0;
 414         op->o_bd->bd_info = bi0;
 415         if (gs.matched)
 416                 free (gs.matched);
 417         if (gs.refs)
 418                 ber_bvarray_free(gs.refs);
 419         return rs->sr_err;
 420 }
 421
 422 static BackendDB toolDB;
 423
 424 static int
 425 glue_tool_entry_open (
 426         BackendDB *b0,
 427         int mode
 428 )
 429 {
 430         slap_overinfo   *oi = (slap_overinfo *)b0->bd_info;
 431
 432         /* We don't know which backend to talk to yet, so just
 433          * remember the mode and move on...
 434          */
 435
 436         glueMode = mode;
 437         glueBack = NULL;
 438         toolDB = *b0;
 439         toolDB.bd_info = oi->oi_orig;
 440
 441         return 0;
 442 }
 443
 444 static int
 445 glue_tool_entry_close (
 446         BackendDB *b0
 447 )
 448 {
 449         int rc = 0;
 450
 451         if (glueBack) {
 452                 if (!glueBack->be_entry_close)
 453                         return 0;
 454                 rc = glueBack->be_entry_close (glueBack);
 455         }
 456         return rc;
 457 }
 458
 459 static slap_overinst *
 460 glue_tool_inst(
 461         BackendInfo *bi
 462 )
 463 {
 464         slap_overinfo   *oi = (slap_overinfo *)bi;
 465         slap_overinst   *on;
 466
 467         for ( on = oi->oi_list; on; on=on->on_next ) {
 468                 if ( !strcmp( on->on_bi.bi_type, glue.on_bi.bi_type ))
 469                         return on;
 470         }
 471         return NULL;
 472 }
 473
 474 /* This function will only be called in tool mode */
 475 static int
 476 glue_open (
 477         BackendInfo *bi
 478 )
 479 {
 480         slap_overinst *on = glue_tool_inst( bi );
 481         glueinfo                *gi = on->on_bi.bi_private;
 482         static int glueOpened = 0;
 483         int i, rc = 0;
 484
 485         if (glueOpened) return 0;
 486
 487         glueOpened = 1;
 488
 489         /* If we were invoked in tool mode, open all the underlying backends */
 490         if (slapMode & SLAP_TOOL_MODE) {
 491                 rc = backend_startup( NULL );
 492         } /* other case is impossible */
 493         return rc;
 494 }
 495
 496 /* This function will only be called in tool mode */
 497 static int
 498 glue_close (
 499         BackendInfo *bi
 500 )
 501 {
 502         slap_overinst *on = glue_tool_inst( bi );
 503         glueinfo                *gi = on->on_bi.bi_private;
 504         static int glueClosed = 0;
 505         int i, rc = 0;
 506
 507         if (glueClosed) return 0;
 508
 509         glueClosed = 1;
 510
 511         if (slapMode & SLAP_TOOL_MODE) {
 512                 rc = backend_shutdown( NULL );
 513         }
 514         return rc;
 515 }
 516
 517 static int
 518 glue_entry_release_rw (
 519         Operation *op,
 520         Entry *e,
 521         int rw
 522 )
 523 {
 524         BackendDB *b0, b2;
 525         int rc;
 526
 527         b0 = op->o_bd;
 528         b2 = *op->o_bd;
 529         b2.bd_info = (BackendInfo *)glue_tool_inst( op->o_bd->bd_info );
 530         op->o_bd = glue_back_select (&b2, &e->e_nname);
 531
 532         rc = op->o_bd->be_release( op, e, rw );
 533         op->o_bd = b0;
 534         return rc;
 535 }
 536
 537 static ID
 538 glue_tool_entry_first (
 539         BackendDB *b0
 540 )
 541 {
 542         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 543         glueinfo                *gi = on->on_bi.bi_private;
 544         int i;
 545
 546         /* If we're starting from scratch, start at the most general */
 547         if (!glueBack) {
 548                 if ( toolDB.be_entry_open && toolDB.be_entry_first ) {
 549                         glueBack = &toolDB;
 550                 } else {
 551                         for (i = gi->gi_nodes-1; i >= 0; i--) {
 552                                 if (gi->gi_n[i].gn_be->be_entry_open &&
 553                                         gi->gi_n[i].gn_be->be_entry_first) {
 554                                                 glueBack = gi->gi_n[i].gn_be;
 555                                         break;
 556                                 }
 557                         }
 558                 }
 559         }
 560         if (!glueBack || !glueBack->be_entry_open || !glueBack->be_entry_first ||
 561                 glueBack->be_entry_open (glueBack, glueMode) != 0)
 562                 return NOID;
 563
 564         return glueBack->be_entry_first (glueBack);
 565 }
 566
 567 static ID
 568 glue_tool_entry_next (
 569         BackendDB *b0
 570 )
 571 {
 572         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 573         glueinfo                *gi = on->on_bi.bi_private;
 574         int i;
 575         ID rc;
 576
 577         if (!glueBack || !glueBack->be_entry_next)
 578                 return NOID;
 579
 580         rc = glueBack->be_entry_next (glueBack);
 581
 582         /* If we ran out of entries in one database, move on to the next */
 583         while (rc == NOID) {
 584                 if ( glueBack && glueBack->be_entry_close )
 585                         glueBack->be_entry_close (glueBack);
 586                 for (i=0; i<gi->gi_nodes; i++) {
 587                         if (gi->gi_n[i].gn_be == glueBack)
 588                                 break;
 589                 }
 590                 if (i == 0) {
 591                         glueBack = NULL;
 592                         break;
 593                 } else {
 594                         glueBack = gi->gi_n[i-1].gn_be;
 595                         rc = glue_tool_entry_first (b0);
 596                 }
 597         }
 598         return rc;
 599 }
 600
 601 static Entry *
 602 glue_tool_entry_get (
 603         BackendDB *b0,
 604         ID id
 605 )
 606 {
 607         if (!glueBack || !glueBack->be_entry_get)
 608                 return NULL;
 609
 610         return glueBack->be_entry_get (glueBack, id);
 611 }
 612
 613 static ID
 614 glue_tool_entry_put (
 615         BackendDB *b0,
 616         Entry *e,
 617         struct berval *text
 618 )
 619 {
 620         BackendDB *be, b2;
 621         int rc;
 622
 623         b2 = *b0;
 624         b2.bd_info = (BackendInfo *)glue_tool_inst( b0->bd_info );
 625         be = glue_back_select (&b2, &e->e_nname);
 626         if ( be == &b2 ) be = &toolDB;
 627
 628         if (!be->be_entry_put)
 629                 return NOID;
 630
 631         if (!glueBack) {
 632                 rc = be->be_entry_open (be, glueMode);
 633                 if (rc != 0)
 634                         return NOID;
 635         } else if (be != glueBack) {
 636                 /* If this entry belongs in a different branch than the
 637                  * previous one, close the current database and open the
 638                  * new one.
 639                  */
 640                 glueBack->be_entry_close (glueBack);
 641                 rc = be->be_entry_open (be, glueMode);
 642                 if (rc != 0)
 643                         return NOID;
 644         }
 645         glueBack = be;
 646         return be->be_entry_put (be, e, text);
 647 }
 648
 649 static int
 650 glue_tool_entry_reindex (
 651         BackendDB *b0,
 652         ID id
 653 )
 654 {
 655         if (!glueBack || !glueBack->be_entry_reindex)
 656                 return -1;
 657
 658         return glueBack->be_entry_reindex (glueBack, id);
 659 }
 660
 661 static int
 662 glue_tool_sync (
 663         BackendDB *b0
 664 )
 665 {
 666         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 667         glueinfo                *gi = on->on_bi.bi_private;
 668         BackendInfo             *bi = b0->bd_info;
 669         int i;
 670
 671         /* just sync everyone */
 672         for (i = 0; i<gi->gi_nodes; i++)
 673                 if (gi->gi_n[i].gn_be->be_sync)
 674                         gi->gi_n[i].gn_be->be_sync (gi->gi_n[i].gn_be);
 675         b0->bd_info = on->on_info->oi_orig;
 676         if ( b0->be_sync )
 677                 b0->be_sync( b0 );
 678         b0->bd_info = bi;
 679         return 0;
 680 }
 681
 682 static int
 683 glue_db_init(
 684         BackendDB *be
 685 )
 686 {
 687         slap_overinst   *on = (slap_overinst *)be->bd_info;
 688         slap_overinfo   *oi = on->on_info;
 689         glueinfo *gi;
 690
 691         gi = ch_calloc( 1, sizeof(glueinfo));
 692         on->on_bi.bi_private = gi;
 693         dnParent( be->be_nsuffix, &gi->gi_pdn );
 694
 695         /* Currently the overlay framework doesn't handle these entry points
 696          * but we need them....
 697          */
 698         oi->oi_bi.bi_open = glue_open;
 699         oi->oi_bi.bi_close = glue_close;
 700
 701         oi->oi_bi.bi_entry_release_rw = glue_entry_release_rw;
 702
 703         oi->oi_bi.bi_tool_entry_open = glue_tool_entry_open;
 704         oi->oi_bi.bi_tool_entry_close = glue_tool_entry_close;
 705         oi->oi_bi.bi_tool_entry_first = glue_tool_entry_first;
 706         oi->oi_bi.bi_tool_entry_next = glue_tool_entry_next;
 707         oi->oi_bi.bi_tool_entry_get = glue_tool_entry_get;
 708         oi->oi_bi.bi_tool_entry_put = glue_tool_entry_put;
 709         oi->oi_bi.bi_tool_entry_reindex = glue_tool_entry_reindex;
 710         oi->oi_bi.bi_tool_sync = glue_tool_sync;
 711
 712         /*FIXME : need to add support */
 713         oi->oi_bi.bi_tool_dn2id_get = 0;
 714         oi->oi_bi.bi_tool_id2entry_get = 0;
 715         oi->oi_bi.bi_tool_entry_modify = 0;
 716
 717         return 0;
 718 }
 719
 720 static int
 721 glue_db_destroy (
 722         BackendDB *be
 723 )
 724 {
 725         slap_overinst   *on = (slap_overinst *)be->bd_info;
 726         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 727
 728         free (gi);
 729         return SLAP_CB_CONTINUE;
 730 }
 731
 732 static int
 733 glue_db_close(
 734         BackendDB *be
 735 )
 736 {
 737         slap_overinst   *on = (slap_overinst *)be->bd_info;
 738
 739         on->on_info->oi_bi.bi_db_close = NULL;
 740         return 0;
 741 }
 742
 743 static int
 744 glue_db_config(
 745         BackendDB       *be,
 746         const char      *fname,
 747         int             lineno,
 748         int             argc,
 749         char    **argv
 750 )
 751 {
 752         slap_overinst   *on = (slap_overinst *)be->bd_info;
 753         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 754
 755         /* redundant; could be applied just once */
 756         SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLUE_INSTANCE;
 757
 758         if ( strcasecmp( argv[0], "glue-sub" ) == 0 ) {
 759                 int i, async = 0, advertise = 0;
 760                 BackendDB *b2;
 761                 struct berval bv, dn;
 762                 gluenode *gn;
 763
 764                 if ( argc < 2 ) {
 765                         fprintf( stderr, "%s: line %d: too few arguments in "
 766                                 "\"glue-sub <suffixDN> [async] [advertise]\"\n", fname, lineno );
 767                         return -1;
 768                 }
 769                 for ( i = 2; i < argc; i++ ) {
 770                         if ( strcasecmp( argv[i], "async" ) == 0 ) {
 771                                 async = 1;
 772
 773                         } else if ( strcasecmp( argv[i], "advertise" ) == 0 ) {
 774                                 advertise = 1;
 775
 776                         } else {
 777                                 fprintf( stderr, "%s: line %d: unrecognized option "
 778                                         "\"%s\" ignored.\n", fname, lineno, argv[i] );
 779                         }
 780                 }
 781                 ber_str2bv( argv[1], 0, 0, &bv );
 782                 if ( dnNormalize( 0, NULL, NULL, &bv, &dn, NULL )) {
 783                         fprintf( stderr, "invalid suffixDN \"%s\"\n", argv[1] );
 784                         return -1;
 785                 }
 786                 b2 = select_backend( &dn, 0, 1 );
 787                 if ( !b2 ) {
 788                         fprintf( stderr, "%s: line %d: unknown suffix \"%s\"\n",
 789                                 fname, lineno, argv[1] );
 790                         return -1;
 791                 }
 792                 SLAP_DBFLAGS(b2) |= SLAP_DBFLAG_GLUE_SUBORDINATE;
 793                 if ( advertise ) {
 794                         SLAP_DBFLAGS(b2) |= SLAP_DBFLAG_GLUE_ADVERTISE;
 795                 }
 796                 gi = (glueinfo *)ch_realloc( gi, sizeof(glueinfo) +
 797                         gi->gi_nodes * sizeof(gluenode));
 798                 gi->gi_n[gi->gi_nodes].gn_be = b2;
 799                 dnParent( &b2->be_nsuffix[0], &gi->gi_n[gi->gi_nodes].gn_pdn );
 800                 gi->gi_n[gi->gi_nodes].gn_async = async;
 801                 gi->gi_nodes++;
 802                 on->on_bi.bi_private = gi;
 803                 return 0;
 804         }
 805         return SLAP_CONF_UNKNOWN;
 806 }
 807
 808 int
 809 glue_init()
 810 {
 811         glue.on_bi.bi_type = "glue";
 812
 813         glue.on_bi.bi_db_init = glue_db_init;
 814         glue.on_bi.bi_db_config = glue_db_config;
 815         glue.on_bi.bi_db_close = glue_db_close;
 816         glue.on_bi.bi_db_destroy = glue_db_destroy;
 817
 818         glue.on_bi.bi_op_search = glue_op_search;
 819         glue.on_bi.bi_op_modify = glue_op_func;
 820         glue.on_bi.bi_op_modrdn = glue_op_func;
 821         glue.on_bi.bi_op_add = glue_op_func;
 822         glue.on_bi.bi_op_delete = glue_op_func;
 823
 824         glue.on_bi.bi_chk_referrals = glue_chk_referrals;
 825         glue.on_bi.bi_chk_controls = glue_chk_controls;
 826
 827         return overlay_register( &glue );
 828 }
 829
 830 #if SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC
 831 int
 832 init_module( int argc, char *argv[] )
 833 {
 834         return glue_init();
 835 }
 836 #endif  /* SLAPD_OVER_GLUE == SLAPD_MOD_DYNAMIC */
 837
 838 #endif  /* defined(SLAPD_OVER_GLUE */