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

   1 /* backglue.c - backend glue */
   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 #include <stdio.h>
  32
  33 #include <ac/string.h>
  34 #include <ac/socket.h>
  35
  36 #define SLAPD_TOOLS
  37 #include "slap.h"
  38
  39 typedef struct gluenode {
  40         BackendDB *gn_be;
  41         struct berval gn_pdn;
  42 } gluenode;
  43
  44 typedef struct glueinfo {
  45         int gi_nodes;
  46         struct berval gi_pdn;
  47         gluenode gi_n[1];
  48 } glueinfo;
  49
  50 static slap_overinst    glue;
  51
  52 static int glueMode;
  53 static BackendDB *glueBack;
  54
  55 static slap_response glue_op_response;
  56
  57 /* Just like select_backend, but only for our backends */
  58 static BackendDB *
  59 glue_back_select (
  60         BackendDB *be,
  61         struct berval *dn
  62 )
  63 {
  64         slap_overinst   *on = (slap_overinst *)be->bd_info;
  65         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
  66         int i;
  67
  68         for (i = 0; i<gi->gi_nodes; i++) {
  69                 assert( gi->gi_n[i].gn_be->be_nsuffix != NULL );
  70
  71                 if (dnIsSuffix(dn, &gi->gi_n[i].gn_be->be_nsuffix[0])) {
  72                         return gi->gi_n[i].gn_be;
  73                 }
  74         }
  75         be->bd_info = on->on_info->oi_orig;
  76         return be;
  77 }
  78
  79
  80 typedef struct glue_state {
  81         int err;
  82         int slimit;
  83         int matchlen;
  84         char *matched;
  85         int nrefs;
  86         BerVarray refs;
  87 } glue_state;
  88
  89 static int
  90 glue_op_response ( Operation *op, SlapReply *rs )
  91 {
  92         glue_state *gs = op->o_callback->sc_private;
  93
  94         switch(rs->sr_type) {
  95         case REP_SEARCH:
  96                 if ( gs->slimit != SLAP_NO_LIMIT
  97                                 && rs->sr_nentries >= gs->slimit )
  98                 {
  99                         rs->sr_err = gs->err = LDAP_SIZELIMIT_EXCEEDED;
 100                         return -1;
 101                 }
 102                 /* fallthru */
 103         case REP_SEARCHREF:
 104                 return SLAP_CB_CONTINUE;
 105
 106         default:
 107                 if (rs->sr_err == LDAP_SUCCESS ||
 108                         rs->sr_err == LDAP_SIZELIMIT_EXCEEDED ||
 109                         rs->sr_err == LDAP_TIMELIMIT_EXCEEDED ||
 110                         rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 111                         rs->sr_err == LDAP_NO_SUCH_OBJECT ||
 112                         gs->err != LDAP_SUCCESS)
 113                         gs->err = rs->sr_err;
 114                 if (gs->err == LDAP_SUCCESS && gs->matched) {
 115                         ch_free (gs->matched);
 116                         gs->matched = NULL;
 117                         gs->matchlen = 0;
 118                 }
 119                 if (gs->err != LDAP_SUCCESS && rs->sr_matched) {
 120                         int len;
 121                         len = strlen (rs->sr_matched);
 122                         if (len > gs->matchlen) {
 123                                 if (gs->matched)
 124                                         ch_free (gs->matched);
 125                                 gs->matched = ch_strdup (rs->sr_matched);
 126                                 gs->matchlen = len;
 127                         }
 128                 }
 129                 if (rs->sr_ref) {
 130                         int i, j, k;
 131                         BerVarray new;
 132
 133                         for (i=0; rs->sr_ref[i].bv_val; i++);
 134
 135                         j = gs->nrefs;
 136                         if (!j) {
 137                                 new = ch_malloc ((i+1)*sizeof(struct berval));
 138                         } else {
 139                                 new = ch_realloc(gs->refs,
 140                                         (j+i+1)*sizeof(struct berval));
 141                         }
 142                         for (k=0; k<i; j++,k++) {
 143                                 ber_dupbv( &new[j], &rs->sr_ref[k] );
 144                         }
 145                         new[j].bv_val = NULL;
 146                         gs->nrefs = j;
 147                         gs->refs = new;
 148                 }
 149         }
 150         return 0;
 151 }
 152
 153 static int
 154 glue_op_func ( Operation *op, SlapReply *rs )
 155 {
 156         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 157         BackendDB *b0 = op->o_bd;
 158         BackendInfo *bi0 = op->o_bd->bd_info;
 159         BI_op_modify **func;
 160         slap_operation_t which = op_bind;
 161         int rc;
 162
 163         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 164         b0->bd_info = on->on_info->oi_orig;
 165
 166         switch(op->o_tag) {
 167         case LDAP_REQ_ADD: which = op_add; break;
 168         case LDAP_REQ_DELETE: which = op_delete; break;
 169         case LDAP_REQ_MODIFY: which = op_modify; break;
 170         case LDAP_REQ_MODRDN: which = op_modrdn; break;
 171         default: assert( 0 ); break;
 172         }
 173
 174         func = &op->o_bd->bd_info->bi_op_bind;
 175         if ( func[which] )
 176                 rc = func[which]( op, rs );
 177         else
 178                 rc = SLAP_CB_CONTINUE;
 179
 180         op->o_bd = b0;
 181         op->o_bd->bd_info = bi0;
 182         return rc;
 183 }
 184
 185 static int
 186 glue_chk_referrals ( Operation *op, SlapReply *rs )
 187 {
 188         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 189         BackendDB *b0 = op->o_bd;
 190         BackendInfo *bi0 = op->o_bd->bd_info;
 191         int rc;
 192
 193         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 194         b0->bd_info = on->on_info->oi_orig;
 195
 196         if ( op->o_bd->bd_info->bi_chk_referrals )
 197                 rc = ( *op->o_bd->bd_info->bi_chk_referrals )( op, rs );
 198         else
 199                 rc = SLAP_CB_CONTINUE;
 200
 201         op->o_bd = b0;
 202         op->o_bd->bd_info = bi0;
 203         return rc;
 204 }
 205
 206 static int
 207 glue_chk_controls ( Operation *op, SlapReply *rs )
 208 {
 209         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 210         BackendDB *b0 = op->o_bd;
 211         BackendInfo *bi0 = op->o_bd->bd_info;
 212         int rc = SLAP_CB_CONTINUE;
 213
 214         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 215         b0->bd_info = on->on_info->oi_orig;
 216
 217         /* if the subordinate database has overlays, the bi_chk_controls()
 218          * hook is actually over_aux_chk_controls(); in case it actually
 219          * wraps a missing hok, we need to mimic the behavior
 220          * of the frontend applied to that database */
 221         if ( op->o_bd->bd_info->bi_chk_controls ) {
 222                 rc = ( *op->o_bd->bd_info->bi_chk_controls )( op, rs );
 223         }
 224
 225
 226         if ( rc == SLAP_CB_CONTINUE ) {
 227                 rc = backend_check_controls( op, rs );
 228         }
 229
 230         op->o_bd = b0;
 231         op->o_bd->bd_info = bi0;
 232         return rc;
 233 }
 234
 235 static int
 236 glue_op_search ( Operation *op, SlapReply *rs )
 237 {
 238         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
 239         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 240         BackendDB *b0 = op->o_bd;
 241         BackendDB *b1 = NULL, *btmp;
 242         BackendInfo *bi0 = op->o_bd->bd_info;
 243         int i;
 244         long stoptime = 0;
 245         glue_state gs = {0, 0, 0, NULL, 0, NULL};
 246         slap_callback cb = { NULL, glue_op_response, NULL, NULL };
 247         int scope0, slimit0, tlimit0;
 248         struct berval dn, ndn, *pdn;
 249
 250         cb.sc_private = &gs;
 251
 252         cb.sc_next = op->o_callback;
 253
 254         stoptime = slap_get_time () + op->ors_tlimit;
 255
 256         op->o_bd = glue_back_select (b0, &op->o_req_ndn);
 257         b0->bd_info = on->on_info->oi_orig;
 258
 259         switch (op->ors_scope) {
 260         case LDAP_SCOPE_BASE:
 261                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 262                 if (op->o_bd && op->o_bd->be_search) {
 263                         rs->sr_err = op->o_bd->be_search( op, rs );
 264                 }
 265                 return rs->sr_err;
 266
 267         case LDAP_SCOPE_ONELEVEL:
 268         case LDAP_SCOPE_SUBTREE:
 269 #ifdef LDAP_SCOPE_SUBORDINATE
 270         case LDAP_SCOPE_SUBORDINATE: /* FIXME */
 271 #endif
 272
 273 #if 0
 274                 if ( op->o_sync ) {
 275                         if (op->o_bd && op->o_bd->be_search) {
 276                                 rs->sr_err = op->o_bd->be_search( op, rs );
 277                         } else {
 278                                 send_ldap_error(op, rs, LDAP_UNWILLING_TO_PERFORM,
 279                                                 "No search target found");
 280                         }
 281                         return rs->sr_err;
 282                 }
 283 #endif
 284
 285                 op->o_callback = &cb;
 286                 rs->sr_err = gs.err = LDAP_UNWILLING_TO_PERFORM;
 287                 scope0 = op->ors_scope;
 288                 slimit0 = gs.slimit = op->ors_slimit;
 289                 tlimit0 = op->ors_tlimit;
 290                 dn = op->o_req_dn;
 291                 ndn = op->o_req_ndn;
 292                 b1 = op->o_bd;
 293
 294                 /*
 295                  * Execute in reverse order, most general first
 296                  */
 297                 for (i = gi->gi_nodes; i >= 0; i--) {
 298                         if ( i == gi->gi_nodes ) {
 299                                 btmp = b0;
 300                                 pdn = &gi->gi_pdn;
 301                         } else {
 302                                 btmp = gi->gi_n[i].gn_be;
 303                                 pdn = &gi->gi_n[i].gn_pdn;
 304                         }
 305                         if (!btmp || !btmp->be_search)
 306                                 continue;
 307                         if (!dnIsSuffix(&btmp->be_nsuffix[0], &b1->be_nsuffix[0]))
 308                                 continue;
 309                         if (tlimit0 != SLAP_NO_LIMIT) {
 310                                 op->ors_tlimit = stoptime - slap_get_time ();
 311                                 if (op->ors_tlimit <= 0) {
 312                                         rs->sr_err = gs.err = LDAP_TIMELIMIT_EXCEEDED;
 313                                         break;
 314                                 }
 315                         }
 316                         if (slimit0 != SLAP_NO_LIMIT) {
 317                                 op->ors_slimit = slimit0 - rs->sr_nentries;
 318                                 if (op->ors_slimit < 0) {
 319                                         rs->sr_err = gs.err = LDAP_SIZELIMIT_EXCEEDED;
 320                                         break;
 321                                 }
 322                         }
 323                         rs->sr_err = 0;
 324                         /*
 325                          * check for abandon
 326                          */
 327                         if (op->o_abandon) {
 328                                 goto end_of_loop;
 329                         }
 330                         op->o_bd = btmp;
 331
 332                         assert( op->o_bd->be_suffix != NULL );
 333                         assert( op->o_bd->be_nsuffix != NULL );
 334
 335                         if (scope0 == LDAP_SCOPE_ONELEVEL &&
 336                                 dn_match(pdn, &ndn))
 337                         {
 338                                 op->ors_scope = LDAP_SCOPE_BASE;
 339                                 op->o_req_dn = op->o_bd->be_suffix[0];
 340                                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
 341                                 rs->sr_err = op->o_bd->be_search(op, rs);
 342
 343                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 344                                 dn_match(&op->o_bd->be_nsuffix[0], &ndn))
 345                         {
 346                                 rs->sr_err = op->o_bd->be_search( op, rs );
 347
 348                         } else if (scope0 == LDAP_SCOPE_SUBTREE &&
 349                                 dnIsSuffix(&op->o_bd->be_nsuffix[0], &ndn))
 350                         {
 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                                 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
 355                                         gs.err = LDAP_SUCCESS;
 356                                 }
 357
 358                         } else if (dnIsSuffix(&ndn, &op->o_bd->be_nsuffix[0])) {
 359                                 rs->sr_err = op->o_bd->be_search( op, rs );
 360                         }
 361
 362                         switch ( gs.err ) {
 363
 364                         /*
 365                          * Add errors that should result in dropping
 366                          * the search
 367                          */
 368                         case LDAP_SIZELIMIT_EXCEEDED:
 369                         case LDAP_TIMELIMIT_EXCEEDED:
 370                         case LDAP_ADMINLIMIT_EXCEEDED:
 371                         case LDAP_NO_SUCH_OBJECT:
 372 #ifdef LDAP_CONTROL_X_CHAINING_BEHAVIOR
 373                         case LDAP_X_CANNOT_CHAIN:
 374 #endif /* LDAP_CONTROL_X_CHAINING_BEHAVIOR */
 375                                 goto end_of_loop;
 376
 377                         default:
 378                                 break;
 379                         }
 380                 }
 381 end_of_loop:;
 382                 op->ors_scope = scope0;
 383                 op->ors_slimit = slimit0;
 384                 op->ors_tlimit = tlimit0;
 385                 op->o_req_dn = dn;
 386                 op->o_req_ndn = ndn;
 387
 388                 break;
 389         }
 390         if ( op->o_abandon ) {
 391                 rs->sr_err = SLAPD_ABANDON;
 392         } else {
 393                 op->o_callback = cb.sc_next;
 394                 rs->sr_err = gs.err;
 395                 rs->sr_matched = gs.matched;
 396                 rs->sr_ref = gs.refs;
 397
 398                 send_ldap_result( op, rs );
 399         }
 400
 401         op->o_bd = b0;
 402         op->o_bd->bd_info = bi0;
 403         if (gs.matched)
 404                 free (gs.matched);
 405         if (gs.refs)
 406                 ber_bvarray_free(gs.refs);
 407         return rs->sr_err;
 408 }
 409
 410 static BackendDB toolDB;
 411
 412 static int
 413 glue_tool_entry_open (
 414         BackendDB *b0,
 415         int mode
 416 )
 417 {
 418         slap_overinfo   *oi = (slap_overinfo *)b0->bd_info;
 419
 420         /* We don't know which backend to talk to yet, so just
 421          * remember the mode and move on...
 422          */
 423
 424         glueMode = mode;
 425         glueBack = NULL;
 426         toolDB = *b0;
 427         toolDB.bd_info = oi->oi_orig;
 428
 429         return 0;
 430 }
 431
 432 static int
 433 glue_tool_entry_close (
 434         BackendDB *b0
 435 )
 436 {
 437         int rc = 0;
 438
 439         if (glueBack) {
 440                 if (!glueBack->be_entry_close)
 441                         return 0;
 442                 rc = glueBack->be_entry_close (glueBack);
 443         }
 444         return rc;
 445 }
 446
 447 static slap_overinst *
 448 glue_tool_inst(
 449         BackendInfo *bi
 450 )
 451 {
 452         slap_overinfo   *oi = (slap_overinfo *)bi;
 453         slap_overinst   *on;
 454
 455         for ( on = oi->oi_list; on; on=on->on_next ) {
 456                 if ( !strcmp( on->on_bi.bi_type, glue.on_bi.bi_type ))
 457                         return on;
 458         }
 459         return NULL;
 460 }
 461
 462 /* This function will only be called in tool mode */
 463 static int
 464 glue_open (
 465         BackendInfo *bi
 466 )
 467 {
 468         slap_overinst *on = glue_tool_inst( bi );
 469         glueinfo                *gi = on->on_bi.bi_private;
 470         static int glueOpened = 0;
 471         int i, j, same, bsame = 0, rc = 0;
 472
 473         if (glueOpened) return 0;
 474
 475         glueOpened = 1;
 476
 477         /* If we were invoked in tool mode, open all the underlying backends */
 478         if (slapMode & SLAP_TOOL_MODE) {
 479                 for (i = 0; i<gi->gi_nodes; i++) {
 480                         same = 0;
 481                         /* Same bi_open as our main backend? */
 482                         if ( gi->gi_n[i].gn_be->bd_info->bi_open ==
 483                                 on->on_info->oi_orig->bi_open )
 484                                 bsame = 1;
 485
 486                         /* Loop thru the bd_info's and make sure we only
 487                          * invoke their bi_open functions once each.
 488                          */
 489                         for ( j = 0; j<i; j++ ) {
 490                                 if ( gi->gi_n[i].gn_be->bd_info->bi_open ==
 491                                         gi->gi_n[j].gn_be->bd_info->bi_open ) {
 492                                         same = 1;
 493                                         break;
 494                                 }
 495                         }
 496                         /* OK, it's unique and non-NULL, call it. */
 497                         if ( !same && gi->gi_n[i].gn_be->bd_info->bi_open )
 498                                 rc = gi->gi_n[i].gn_be->bd_info->bi_open(
 499                                         gi->gi_n[i].gn_be->bd_info );
 500                         /* Let backend.c take care of the rest of startup */
 501                         if ( !rc )
 502                                 rc = backend_startup_one( gi->gi_n[i].gn_be );
 503                         if ( rc ) break;
 504                 }
 505                 if ( !rc && !bsame && on->on_info->oi_orig->bi_open )
 506                         rc = on->on_info->oi_orig->bi_open( on->on_info->oi_orig );
 507
 508         } /* other case is impossible */
 509         return rc;
 510 }
 511
 512 /* This function will only be called in tool mode */
 513 static int
 514 glue_close (
 515         BackendInfo *bi
 516 )
 517 {
 518         static int glueClosed = 0;
 519         int rc = 0;
 520
 521         if (glueClosed) return 0;
 522
 523         glueClosed = 1;
 524
 525         if (slapMode & SLAP_TOOL_MODE) {
 526                 rc = backend_shutdown( NULL );
 527         }
 528         return rc;
 529 }
 530
 531 static int
 532 glue_entry_release_rw (
 533         Operation *op,
 534         Entry *e,
 535         int rw
 536 )
 537 {
 538         BackendDB *b0, b2;
 539         int rc = -1;
 540
 541         b0 = op->o_bd;
 542         b2 = *op->o_bd;
 543         b2.bd_info = (BackendInfo *)glue_tool_inst( op->o_bd->bd_info );
 544         op->o_bd = glue_back_select (&b2, &e->e_nname);
 545
 546         if ( op->o_bd->be_release ) {
 547                 rc = op->o_bd->be_release( op, e, rw );
 548
 549         } else {
 550                 /* FIXME: mimic be_entry_release_rw
 551                  * when no be_release() available */
 552                 /* free entry */
 553                 entry_free( e );
 554                 rc = 0;
 555         }
 556         op->o_bd = b0;
 557         return rc;
 558 }
 559
 560 static ID
 561 glue_tool_entry_first (
 562         BackendDB *b0
 563 )
 564 {
 565         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 566         glueinfo                *gi = on->on_bi.bi_private;
 567         int i;
 568
 569         /* If we're starting from scratch, start at the most general */
 570         if (!glueBack) {
 571                 if ( toolDB.be_entry_open && toolDB.be_entry_first ) {
 572                         glueBack = &toolDB;
 573                 } else {
 574                         for (i = gi->gi_nodes-1; i >= 0; i--) {
 575                                 if (gi->gi_n[i].gn_be->be_entry_open &&
 576                                         gi->gi_n[i].gn_be->be_entry_first) {
 577                                                 glueBack = gi->gi_n[i].gn_be;
 578                                         break;
 579                                 }
 580                         }
 581                 }
 582         }
 583         if (!glueBack || !glueBack->be_entry_open || !glueBack->be_entry_first ||
 584                 glueBack->be_entry_open (glueBack, glueMode) != 0)
 585                 return NOID;
 586
 587         return glueBack->be_entry_first (glueBack);
 588 }
 589
 590 static ID
 591 glue_tool_entry_next (
 592         BackendDB *b0
 593 )
 594 {
 595         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 596         glueinfo                *gi = on->on_bi.bi_private;
 597         int i;
 598         ID rc;
 599
 600         if (!glueBack || !glueBack->be_entry_next)
 601                 return NOID;
 602
 603         rc = glueBack->be_entry_next (glueBack);
 604
 605         /* If we ran out of entries in one database, move on to the next */
 606         while (rc == NOID) {
 607                 if ( glueBack && glueBack->be_entry_close )
 608                         glueBack->be_entry_close (glueBack);
 609                 for (i=0; i<gi->gi_nodes; i++) {
 610                         if (gi->gi_n[i].gn_be == glueBack)
 611                                 break;
 612                 }
 613                 if (i == 0) {
 614                         glueBack = NULL;
 615                         break;
 616                 } else {
 617                         glueBack = gi->gi_n[i-1].gn_be;
 618                         rc = glue_tool_entry_first (b0);
 619                 }
 620         }
 621         return rc;
 622 }
 623
 624 static Entry *
 625 glue_tool_entry_get (
 626         BackendDB *b0,
 627         ID id
 628 )
 629 {
 630         if (!glueBack || !glueBack->be_entry_get)
 631                 return NULL;
 632
 633         return glueBack->be_entry_get (glueBack, id);
 634 }
 635
 636 static ID
 637 glue_tool_entry_put (
 638         BackendDB *b0,
 639         Entry *e,
 640         struct berval *text
 641 )
 642 {
 643         BackendDB *be, b2;
 644         int rc = -1;
 645
 646         b2 = *b0;
 647         b2.bd_info = (BackendInfo *)glue_tool_inst( b0->bd_info );
 648         be = glue_back_select (&b2, &e->e_nname);
 649         if ( be == &b2 ) be = &toolDB;
 650
 651         if (!be->be_entry_put)
 652                 return NOID;
 653
 654         if (!glueBack) {
 655                 if ( be->be_entry_open ) {
 656                         rc = be->be_entry_open (be, glueMode);
 657                 }
 658                 if (rc != 0) {
 659                         return NOID;
 660                 }
 661         } else if (be != glueBack) {
 662                 /* If this entry belongs in a different branch than the
 663                  * previous one, close the current database and open the
 664                  * new one.
 665                  */
 666                 if ( glueBack->be_entry_close ) {
 667                         glueBack->be_entry_close (glueBack);
 668                 }
 669                 if ( be->be_entry_open ) {
 670                         rc = be->be_entry_open (be, glueMode);
 671                 }
 672                 if (rc != 0) {
 673                         return NOID;
 674                 }
 675         }
 676         glueBack = be;
 677         return be->be_entry_put (be, e, text);
 678 }
 679
 680 static int
 681 glue_tool_entry_reindex (
 682         BackendDB *b0,
 683         ID id
 684 )
 685 {
 686         if (!glueBack || !glueBack->be_entry_reindex)
 687                 return -1;
 688
 689         return glueBack->be_entry_reindex (glueBack, id);
 690 }
 691
 692 static int
 693 glue_tool_sync (
 694         BackendDB *b0
 695 )
 696 {
 697         slap_overinst   *on = glue_tool_inst( b0->bd_info );
 698         glueinfo                *gi = on->on_bi.bi_private;
 699         BackendInfo             *bi = b0->bd_info;
 700         int i;
 701
 702         /* just sync everyone */
 703         for (i = 0; i<gi->gi_nodes; i++)
 704                 if (gi->gi_n[i].gn_be->be_sync)
 705                         gi->gi_n[i].gn_be->be_sync (gi->gi_n[i].gn_be);
 706         b0->bd_info = on->on_info->oi_orig;
 707         if ( b0->be_sync )
 708                 b0->be_sync( b0 );
 709         b0->bd_info = bi;
 710         return 0;
 711 }
 712
 713 static int
 714 glue_db_init(
 715         BackendDB *be
 716 )
 717 {
 718         slap_overinst   *on = (slap_overinst *)be->bd_info;
 719         slap_overinfo   *oi = on->on_info;
 720         BackendInfo     *bi = oi->oi_orig;
 721         glueinfo *gi;
 722
 723         gi = ch_calloc( 1, sizeof(glueinfo));
 724         on->on_bi.bi_private = gi;
 725         dnParent( be->be_nsuffix, &gi->gi_pdn );
 726
 727         /* Currently the overlay framework doesn't handle these entry points
 728          * but we need them....
 729          */
 730         oi->oi_bi.bi_open = glue_open;
 731         oi->oi_bi.bi_close = glue_close;
 732
 733         oi->oi_bi.bi_entry_release_rw = glue_entry_release_rw;
 734
 735         /* Only advertise these if the root DB supports them */
 736         if ( bi->bi_tool_entry_open )
 737                 oi->oi_bi.bi_tool_entry_open = glue_tool_entry_open;
 738         if ( bi->bi_tool_entry_close )
 739                 oi->oi_bi.bi_tool_entry_close = glue_tool_entry_close;
 740         if ( bi->bi_tool_entry_first )
 741                 oi->oi_bi.bi_tool_entry_first = glue_tool_entry_first;
 742         if ( bi->bi_tool_entry_next )
 743                 oi->oi_bi.bi_tool_entry_next = glue_tool_entry_next;
 744         if ( bi->bi_tool_entry_get )
 745                 oi->oi_bi.bi_tool_entry_get = glue_tool_entry_get;
 746         if ( bi->bi_tool_entry_put )
 747                 oi->oi_bi.bi_tool_entry_put = glue_tool_entry_put;
 748         if ( bi->bi_tool_entry_reindex )
 749                 oi->oi_bi.bi_tool_entry_reindex = glue_tool_entry_reindex;
 750         if ( bi->bi_tool_sync )
 751                 oi->oi_bi.bi_tool_sync = glue_tool_sync;
 752
 753         /*FIXME : need to add support */
 754         oi->oi_bi.bi_tool_dn2id_get = 0;
 755         oi->oi_bi.bi_tool_id2entry_get = 0;
 756         oi->oi_bi.bi_tool_entry_modify = 0;
 757
 758         SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLUE_INSTANCE;
 759
 760         return 0;
 761 }
 762
 763 static int
 764 glue_db_destroy (
 765         BackendDB *be
 766 )
 767 {
 768         slap_overinst   *on = (slap_overinst *)be->bd_info;
 769         glueinfo                *gi = (glueinfo *)on->on_bi.bi_private;
 770
 771         free (gi);
 772         return SLAP_CB_CONTINUE;
 773 }
 774
 775 static int
 776 glue_db_close(
 777         BackendDB *be
 778 )
 779 {
 780         slap_overinst   *on = (slap_overinst *)be->bd_info;
 781
 782         on->on_info->oi_bi.bi_db_close = NULL;
 783         return 0;
 784 }
 785
 786 int
 787 glue_sub_del( BackendDB *b0 )
 788 {
 789         BackendDB *be;
 790         int rc = 0;
 791
 792         /* Find the top backend for this subordinate */
 793         be = b0;
 794         while ( (be=LDAP_STAILQ_NEXT( be, be_next )) != NULL ) {
 795                 slap_overinfo *oi;
 796                 slap_overinst *on;
 797                 glueinfo *gi;
 798                 int i;
 799
 800                 if ( SLAP_GLUE_SUBORDINATE( be ))
 801                         continue;
 802                 if ( !SLAP_GLUE_INSTANCE( be ))
 803                         continue;
 804                 if ( !dnIsSuffix( &b0->be_nsuffix[0], &be->be_nsuffix[0] ))
 805                         continue;
 806
 807                 /* OK, got the right backend, find the overlay */
 808                 oi = (slap_overinfo *)be->bd_info;
 809                 for ( on=oi->oi_list; on; on=on->on_next ) {
 810                         if ( on->on_bi.bi_type == glue.on_bi.bi_type )
 811                                 break;
 812                 }
 813                 assert( on != NULL );
 814                 gi = on->on_bi.bi_private;
 815                 for ( i=0; i < gi->gi_nodes; i++ ) {
 816                         if ( gi->gi_n[i].gn_be == b0 ) {
 817                                 int j;
 818
 819                                 for (j=i+1; j < gi->gi_nodes; j++)
 820                                         gi->gi_n[j-1] = gi->gi_n[j];
 821
 822                                 gi->gi_nodes--;
 823                         }
 824                 }
 825         }
 826         if ( be == NULL )
 827                 rc = LDAP_NO_SUCH_OBJECT;
 828
 829         return rc;
 830 }
 831
 832 typedef struct glue_Addrec {
 833         struct glue_Addrec *ga_next;
 834         BackendDB *ga_be;
 835 } glue_Addrec;
 836
 837 /* List of added subordinates */
 838 static glue_Addrec *ga_list;
 839
 840 /* Attach all the subordinate backends to their superior */
 841 int
 842 glue_sub_attach()
 843 {
 844         glue_Addrec *ga, *gnext = NULL;
 845         int rc = 0;
 846
 847         /* For all the subordinate backends */
 848         for ( ga=ga_list; ga != NULL; ga = gnext ) {
 849                 BackendDB *be;
 850
 851                 gnext = ga->ga_next;
 852
 853                 /* Find the top backend for this subordinate */
 854                 be = ga->ga_be;
 855                 while ( (be=LDAP_STAILQ_NEXT( be, be_next )) != NULL ) {
 856                         slap_overinfo *oi;
 857                         slap_overinst *on;
 858                         glueinfo *gi;
 859
 860                         if ( SLAP_GLUE_SUBORDINATE( be ))
 861                                 continue;
 862                         if ( !dnIsSuffix( &ga->ga_be->be_nsuffix[0], &be->be_nsuffix[0] ))
 863                                 continue;
 864
 865                         /* If it's not already configured, set up the overlay */
 866                         if ( !SLAP_GLUE_INSTANCE( be )) {
 867                                 rc = overlay_config( be, glue.on_bi.bi_type );
 868                                 if ( rc )
 869                                         break;
 870                         }
 871                         /* Find the overlay instance */
 872                         oi = (slap_overinfo *)be->bd_info;
 873                         for ( on=oi->oi_list; on; on=on->on_next ) {
 874                                 if ( on->on_bi.bi_type == glue.on_bi.bi_type )
 875                                         break;
 876                         }
 877                         assert( on != NULL );
 878                         gi = on->on_bi.bi_private;
 879                         gi = (glueinfo *)ch_realloc( gi, sizeof(glueinfo) +
 880                                 gi->gi_nodes * sizeof(gluenode));
 881                         gi->gi_n[gi->gi_nodes].gn_be = ga->ga_be;
 882                         dnParent( &ga->ga_be->be_nsuffix[0],
 883                                 &gi->gi_n[gi->gi_nodes].gn_pdn );
 884                         gi->gi_nodes++;
 885                         on->on_bi.bi_private = gi;
 886                         break;
 887                 }
 888                 if ( !be ) {
 889                         Debug( LDAP_DEBUG_ANY, "glue: no superior found for sub %s!\n",
 890                                 ga->ga_be->be_suffix[0].bv_val, 0, 0 );
 891                         rc = LDAP_NO_SUCH_OBJECT;
 892                 }
 893                 ch_free( ga );
 894                 if ( rc ) break;
 895         }
 896
 897         ga_list = gnext;
 898
 899         return rc;
 900 }
 901
 902 int
 903 glue_sub_add( BackendDB *be, int advert, int online )
 904 {
 905         glue_Addrec *ga;
 906         int rc = 0;
 907
 908         SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLUE_SUBORDINATE;
 909         if ( advert )
 910                 SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_GLUE_ADVERTISE;
 911
 912         ga = ch_malloc( sizeof( glue_Addrec ));
 913         ga->ga_next = ga_list;
 914         ga->ga_be = be;
 915         ga_list = ga;
 916
 917         if ( online )
 918                 rc = glue_sub_attach();
 919
 920         return rc;
 921 }
 922
 923 int
 924 glue_sub_init()
 925 {
 926         glue.on_bi.bi_type = "glue";
 927
 928         glue.on_bi.bi_db_init = glue_db_init;
 929         glue.on_bi.bi_db_close = glue_db_close;
 930         glue.on_bi.bi_db_destroy = glue_db_destroy;
 931
 932         glue.on_bi.bi_op_search = glue_op_search;
 933         glue.on_bi.bi_op_modify = glue_op_func;
 934         glue.on_bi.bi_op_modrdn = glue_op_func;
 935         glue.on_bi.bi_op_add = glue_op_func;
 936         glue.on_bi.bi_op_delete = glue_op_func;
 937
 938         glue.on_bi.bi_chk_referrals = glue_chk_referrals;
 939         glue.on_bi.bi_chk_controls = glue_chk_controls;
 940
 941         return overlay_register( &glue );
 942 }