git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/cache-search.c

   1 /*
   2  * Copyright (c) 2003 by International Business Machines, Inc.
   3  *
   4  * International Business Machines, Inc. (hereinafter called IBM) grants
   5  * permission under its copyrights to use, copy, modify, and distribute this
   6  * Software with or without fee, provided that the above copyright notice and
   7  * all paragraphs of this notice appear in all copies, and that the name of IBM
   8  * not be used in connection with the marketing of any product incorporating
   9  * the Software or modifications thereof, without specific, written prior
  10  * permission.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
  13  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  14  * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
  15  * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
  17  * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
  18  *
  19  *
  20  * This software is based on the backends back-ldap and back-meta, implemented
  21  * by Howard Chu <hyc@highlandsun.com>, Mark Valence
  22  * <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
  23  * contributors.
  24  *
  25  * The original copyright statements follow.
  26  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
  27  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  28  *
  29  * Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
  30  *
  31  * This work has been developed to fulfill the requirements
  32  * of SysNet s.n.c. <http:www.sys-net.it> and it has been donated
  33  * to the OpenLDAP Foundation in the hope that it may be useful
  34  * to the Open Source community, but WITHOUT ANY WARRANTY.
  35  *
  36  * Permission is granted to anyone to use this software for any purpose
  37  * on any computer system, and to alter it and redistribute it, subject
  38  * to the following restrictions:
  39  *
  40  * 1. The author and SysNet s.n.c. are not responsible for the consequences
  41  *    of use of this software, no matter how awful, even if they arise from
  42  *    flaws in it.
  43  *
  44  * 2. The origin of this software must not be misrepresented, either by
  45  *    explicit claim or by omission.  Since few users ever read sources,
  46  *    credits should appear in the documentation.
  47  *
  48  * 3. Altered versions must be plainly marked as such, and must not be
  49  *    misrepresented as being the original software.  Since few users
  50  *    ever read sources, credits should appear in the documentation.
  51  *    SysNet s.n.c. cannot be responsible for the consequences of the
  52  *    alterations.
  53  *
  54  * 4. This notice may not be removed or altered.
  55  *
  56  *
  57  * This software is based on the backend back-ldap, implemented
  58  * by Howard Chu <hyc@highlandsun.com>, and modified by Mark Valence
  59  * <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
  60  * contributors. The contribution of the original software to the present
  61  * implementation is acknowledged in this copyright statement.
  62  *
  63  * A special acknowledgement goes to Howard for the overall architecture
  64  * (and for borrowing large pieces of code), and to Mark, who implemented
  65  * from scratch the attribute/objectclass mapping.
  66  *
  67  * The original copyright statement follows.
  68  *
  69  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
  70  *
  71  * Permission is granted to anyone to use this software for any purpose
  72  * on any computer system, and to alter it and redistribute it, subject
  73  * to the following restrictions:
  74  *
  75  * 1. The author is not responsible for the consequences of use of this
  76  *    software, no matter how awful, even if they arise from flaws in it.
  77  *
  78  * 2. The origin of this software must not be misrepresented, either by
  79  *    explicit claim or by omission.  Since few users ever read sources,
  80  *    credits should appear in the documentation.
  81  *
  82  * 3. Altered versions must be plainly marked as such, and must not be
  83  *    misrepresented as being the original software.  Since few users
  84  *    ever read sources, credits should appear in the
  85  *    documentation.
  86  *
  87  * 4. This notice may not be removed or altered.
  88  *
  89  */
  90 #include "portable.h"
  91
  92 #include <stdio.h>
  93
  94 #include <ac/socket.h>
  95 #include <ac/string.h>
  96 #include <ac/time.h>
  97
  98 #include "ldap_pvt.h"
  99 #include "lutil.h"
 100 #include "slap.h"
 101 #include "../back-ldap/back-ldap.h"
 102 #include "back-meta.h"
 103 #undef ldap_debug       /* silence a warning in ldap-int.h */
 104 #include "ldap_log.h"
 105 #include "../../../libraries/libldap/ldap-int.h"
 106
 107 #ifdef LDAP_CACHING
 108 static Entry*
 109 meta_create_entry(
 110         Backend         *be,
 111         struct metaconn *lc,
 112         int             target,
 113         LDAPMessage     *e,
 114         struct exception* result
 115 );
 116
 117 static int
 118 is_one_level_rdn(
 119         const char      *rdn,
 120         int             from
 121 );
 122
 123 static struct metaconn*
 124 metaConnect(
 125         Operation               *op,
 126         SlapReply               *rs,
 127         int                     op_type,
 128         struct berval           *nbase,
 129         struct exception        *result
 130 );
 131
 132 static void
 133 add_filter_attrs(
 134         AttributeName** newattrs,
 135         AttributeName* attrs,
 136         AttributeName* filter_attrs
 137 );
 138
 139 static int
 140 handleLdapResult(
 141         struct metaconn* lc,
 142         Operation* op,
 143         SlapReply *rs,
 144         int* msgid, Backend* be,
 145         AttributeName* attrs,
 146         int attrsonly,
 147         int candidates,
 148         int cacheable,
 149         Entry*** entry_array,
 150         int curr_limit,
 151         int slimit,
 152         struct exception* result
 153 );
 154
 155 static Entry*
 156 get_result_entry(
 157         Backend* be,
 158         struct metaconn* lc,
 159         struct metasingleconn* lsc,
 160         int* msgid,
 161         int i,
 162         struct timeval* tv,
 163         struct exception* result
 164 );
 165
 166 static void
 167 rewriteSession(
 168         struct rewrite_info* info,
 169         const char* rewriteContext,
 170         const char* string,
 171         const void* cookie,
 172         char** base,
 173         struct exception* result
 174 );
 175
 176 static int
 177 get_attr_set(
 178         AttributeName* attrs,
 179         query_manager* qm,
 180         int num
 181 );
 182
 183 static int
 184 attrscmp(
 185         AttributeName* attrs_in,
 186         AttributeName* attrs
 187 );
 188
 189 static char*
 190 cache_entries(
 191         Operation       *op,
 192         SlapReply       *rs,
 193         Entry** entry_array,
 194         cache_manager* cm,
 195         struct exception* result
 196 );
 197
 198 static int
 199 is_temp_answerable(
 200         int attr_set,
 201         struct berval* tempstr,
 202         query_manager* qm,
 203         int template_id
 204 );
 205
 206 static void
 207 consistency_check(
 208         Operation       *op,
 209         SlapReply       *rs,
 210         Backend         *glue_be
 211 );
 212
 213 static int
 214 cache_back_sentry(
 215         Operation* op,
 216         SlapReply *rs
 217 );
 218
 219 int
 220 meta_back_cache_search(
 221         Operation       *op,
 222         SlapReply       *rs )
 223         /*
 224         Backend         *be,
 225         Connection      *conn,
 226         Operation       *op,
 227         struct berval   *base,
 228         struct berval   *nbase,
 229         int             scope,
 230         int             deref,
 231         int             slimit,
 232         int             tlimit,
 233         Filter          *filt,
 234         struct berval   *filterstr,
 235         AttributeName   *attributes,
 236         int             attrsonly
 237 ) */
 238 {
 239         struct metainfo         *li = ( struct metainfo * )op->o_bd->be_private;
 240         struct metaconn         *lc;
 241         struct metasingleconn   *lsc;
 242         cache_manager*          cm = li->cm;
 243         query_manager*          qm = cm->qm;
 244
 245         time_t                  curr_time;
 246
 247         int count, rc = 0, *msgid = NULL;
 248         char *mbase = NULL;
 249         char *cbase = NULL;
 250         char *uuid;
 251
 252         int i = -1, last = 0, candidates = 0, op_type;
 253
 254         struct berval   mfilter;
 255         struct berval   cachebase = { 0L, NULL };
 256         struct berval   ncachebase = { 0L, NULL };
 257         struct berval   cache_suffix;
 258         struct berval   tempstr = { 0L, NULL };
 259
 260         AttributeName   *filter_attrs = NULL;
 261         AttributeName   *new_attrs = NULL;
 262         AttributeName   *attrs = NULL;
 263
 264         Entry           *e;
 265         Entry           **entry_array = NULL;
 266
 267         Query           query;
 268
 269         int             attr_set = -1;
 270         int             template_id = -1;
 271         int             answerable = 0;
 272         int             cacheable = 0;
 273         int             num_entries = 0;
 274         int             curr_limit;
 275         int             fattr_cnt=0;
 276
 277
 278         struct exception result[1];
 279
 280         Filter* filter = str2filter(op->ors_filterstr.bv_val);
 281         slap_callback cb = {cache_back_sentry, NULL};
 282
 283         cb.sc_private = op->o_bd;
 284
 285         if (op->ors_attrs) {
 286                 for ( count=0; op->ors_attrs[ count ].an_name.bv_val; count++ )
 287                         ;
 288                 attrs = (AttributeName*)malloc( ( count + 1 ) *
 289                                                 sizeof(AttributeName));
 290                 for ( count=0; op->ors_attrs[ count ].an_name.bv_val; count++ ) {
 291                         ber_dupbv(&attrs[ count ].an_name,
 292                                                 &op->ors_attrs[ count ].an_name);
 293                         attrs[count].an_desc = op->ors_attrs[count].an_desc;
 294                 }
 295                 attrs[ count ].an_name.bv_val = NULL;
 296                 attrs[ count ].an_name.bv_len = 0;
 297         }
 298
 299         result->type = SUCCESS;
 300         result->rc = 0;
 301         ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
 302         cm->threads++;
 303 #ifdef NEW_LOGGING
 304         LDAP_LOG( BACK_META, DETAIL1, "Threads++ = %d\n", cm->threads, 0, 0 );
 305 #else /* !NEW_LOGGING */
 306         Debug( LDAP_DEBUG_ANY, "Threads++ = %d\n", cm->threads, 0, 0 );
 307 #endif /* !NEW_LOGGING */
 308         ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
 309
 310         filter2template(filter, &tempstr, &filter_attrs, &fattr_cnt, result);
 311         if (result->type != SUCCESS)
 312                 goto Catch;
 313
 314 #ifdef NEW_LOGGING
 315         LDAP_LOG( BACK_META, DETAIL1, "query template of incoming query = %s\n",
 316                                         tempstr.bv_val, 0, 0 );
 317 #else /* !NEW_LOGGING */
 318         Debug( LDAP_DEBUG_ANY, "query template of incoming query = %s\n",
 319                                         tempstr.bv_val, 0, 0 );
 320 #endif /* !NEW_LOGGING */
 321         curr_limit = cm->num_entries_limit ;
 322
 323         /* find attr set */
 324         attr_set = get_attr_set(attrs, qm, cm->numattrsets);
 325
 326         query.filter = filter;
 327         query.attrs = attrs;
 328         query.base = op->o_req_dn;
 329         query.scope = op->ors_scope;
 330
 331         /* check for query containment */
 332         if (attr_set > -1) {
 333                 for (i=0; i<cm->numtemplates; i++) {
 334                         /* find if template i can potentially answer tempstr */
 335                         if (!is_temp_answerable(attr_set, &tempstr, qm, i))
 336                                 continue;
 337                         if (attr_set == qm->templates[i].attr_set_index) {
 338                                 cacheable = 1;
 339                                 template_id = i;
 340                         }
 341 #ifdef NEW_LOGGING
 342                         LDAP_LOG( BACK_META, DETAIL2,
 343                                         "Entering QC, querystr = %s\n",
 344                                         op->ors_filterstr.bv_val, 0, 0 );
 345 #else /* !NEW_LOGGING */
 346                         Debug( LDAP_DEBUG_NONE, "Entering QC, querystr = %s\n",
 347                                         op->ors_filterstr.bv_val, 0, 0 );
 348 #endif /* !NEW_LOGGING */
 349                         answerable = (*(qm->qcfunc))(qm, &query, i);
 350
 351                         if (answerable)
 352                                 break;
 353                 }
 354         }
 355
 356         if (answerable) {
 357                 Operation       op_tmp;
 358
 359 #ifdef NEW_LOGGING
 360                 LDAP_LOG( BACK_META, DETAIL1, "QUERY ANSWERABLE\n", 0, 0, 0 );
 361 #else /* !NEW_LOGGING */
 362                 Debug( LDAP_DEBUG_ANY, "QUERY ANSWERABLE\n", 0, 0, 0 );
 363 #endif /* !NEW_LOGGING */
 364                 rewriteSession(li->rwinfo, "cacheBase", op->o_req_dn.bv_val,
 365                                         op->o_conn, &cbase, result);
 366                 if (result->type != SUCCESS) {
 367                         ldap_pvt_thread_rdwr_runlock(&qm->templates[i].t_rwlock);
 368                         goto Catch;
 369                 }
 370                 if ( cbase == NULL ) {
 371                         cachebase = op->o_req_dn;
 372                 } else {
 373                         cachebase.bv_val = cbase;
 374                         cachebase.bv_len = strlen(cbase);
 375                 }
 376                 dnNormalize(0, NULL, NULL, &cachebase, &ncachebase,
 377                                 op->o_tmpmemctx);
 378
 379                 /* FIXME: safe default? */
 380                 op_tmp = *op;
 381
 382                 op_tmp.o_bd = li->glue_be;
 383                 op_tmp.o_req_dn = cachebase;
 384                 op_tmp.o_req_ndn = ncachebase;
 385
 386                 op_tmp.o_caching_on = 1;
 387                 op_tmp.o_callback = &cb;
 388
 389                 li->glue_be->be_search(op, rs);
 390                 ber_memfree( ncachebase.bv_val );
 391                 if ( cachebase.bv_val != op->o_req_dn.bv_val ) {
 392                         /* free only if rewritten */
 393                         free( cachebase.bv_val );
 394                 }
 395
 396                 ldap_pvt_thread_rdwr_runlock(&qm->templates[i].t_rwlock);
 397         } else {
 398 #ifdef NEW_LOGGING
 399                 LDAP_LOG( BACK_META, DETAIL1, "QUERY NOT ANSWERABLE\n",
 400                                         0, 0, 0 );
 401 #else /* !NEW_LOGGING */
 402                 Debug( LDAP_DEBUG_ANY, "QUERY NOT ANSWERABLE\n", 0, 0, 0 );
 403 #endif /* !NEW_LOGGING */
 404
 405                 if ( op->ors_scope == LDAP_SCOPE_BASE ) {
 406                         op_type = META_OP_REQUIRE_SINGLE;
 407                 } else {
 408                         op_type = META_OP_ALLOW_MULTIPLE;
 409                 }
 410
 411                 lc = metaConnect(op, rs, op_type,
 412                                 &op->o_req_ndn, result);
 413
 414                 if (result->type != SUCCESS)
 415                         goto Catch;
 416
 417                 ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
 418                 if (cm->num_cached_queries >= cm->max_queries) {
 419                         cacheable = 0;
 420                 }
 421                 ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
 422
 423                 if (cacheable) {
 424 #ifdef NEW_LOGGING
 425                         LDAP_LOG( BACK_META, DETAIL1,
 426                                         "QUERY TEMPLATE CACHEABLE\n",
 427                                         0, 0, 0);
 428 #else /* !NEW_LOGGING */
 429                         Debug( LDAP_DEBUG_ANY, "QUERY TEMPLATE CACHEABLE\n",
 430                                         0, 0, 0);
 431 #endif /* !NEW_LOGGING */
 432                         add_filter_attrs(&new_attrs, attrs, filter_attrs);
 433                 } else {
 434                         new_attrs = attrs;
 435                 }
 436
 437                 free(filter_attrs);
 438
 439                 /*
 440                  * Array of message id of each target
 441                  */
 442                 msgid = ch_calloc( sizeof( int ), li->ntargets );
 443                 if ( msgid == NULL ) {
 444                         result->type = CONN_ERR;
 445                         goto Catch;
 446                 }
 447
 448                 /*
 449                 if (slimit > 0 &&  (slimit <= cm->num_entries_limit))
 450                         slimit = cm->num_entries_limit;
 451                 */
 452
 453                 /*
 454                  * Inits searches
 455                  */
 456
 457                 for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) {
 458                         char    *realbase = ( char * )op->o_req_dn.bv_val;
 459                         int     realscope = op->ors_scope;
 460                         ber_len_t suffixlen;
 461                         char    *mapped_filter, **mapped_attrs;
 462
 463                         /* FIXME: Check for more than one targets */
 464                         if ( meta_back_is_candidate(
 465                                         &li->targets[i]->suffix,
 466                                         &op->o_req_ndn ))
 467                                 lsc->candidate = META_CANDIDATE;
 468
 469                         if ( lsc->candidate != META_CANDIDATE )
 470                                 continue;
 471
 472                         if ( op->ors_deref != -1 ) {
 473                                 ldap_set_option( lsc->ld, LDAP_OPT_DEREF,
 474                                                 ( void * )&op->ors_deref);
 475                         }
 476                         if ( op->ors_tlimit != -1 ) {
 477                                 ldap_set_option( lsc->ld, LDAP_OPT_TIMELIMIT,
 478                                                 ( void * )&op->ors_tlimit);
 479                         }
 480                         if ( op->ors_slimit != -1 ) {
 481                                 ldap_set_option( lsc->ld, LDAP_OPT_SIZELIMIT,
 482                                                 ( void * )&op->ors_slimit);
 483                         }
 484
 485                         /*
 486                          * modifies the base according to the scope, if required
 487                          */
 488                         suffixlen = li->targets[ i ]->suffix.bv_len;
 489                         if ( suffixlen > op->o_req_ndn.bv_len ) {
 490                                 switch ( op->ors_scope ) {
 491                                 case LDAP_SCOPE_SUBTREE:
 492                                         /*
 493                                          * make the target suffix the new base
 494                                          * FIXME: this is very forgiving,
 495                                          * because illegal bases may be turned
 496                                          * into the suffix of the target.
 497                                          */
 498                                         if ( dnIsSuffix(
 499                                                 &li->targets[ i ]->suffix,
 500                                                 &op->o_req_ndn ) ) {
 501                                                 realbase =
 502                                                 li->targets[i]->suffix.bv_val;
 503                                         } else {
 504                                                 /*
 505                                                  * this target is no longer
 506                                                  * candidate
 507                                                  */
 508                                                 lsc->candidate =
 509                                                         META_NOT_CANDIDATE;
 510                                                 continue;
 511                                         }
 512                                         break;
 513
 514                                 case LDAP_SCOPE_ONELEVEL:
 515                                         if ( is_one_level_rdn(
 516                                                 li->targets[ i ]->suffix.bv_val,
 517                                                 suffixlen - op->o_req_ndn.bv_len - 1 )
 518                                                 && dnIsSuffix(
 519                                                 &li->targets[ i ]->suffix,
 520                                                 &op->o_req_ndn ) ) {
 521                                                 /*
 522                                                  * if there is exactly one
 523                                                  * level, make the target suffix
 524                                                  * the new base, and make scope
 525                                                  * "base"
 526                                                  */
 527                                                 realbase =
 528                                                 li->targets[i]->suffix.bv_val;
 529                                                 realscope = LDAP_SCOPE_BASE;
 530                                                 break;
 531                                         } /* else continue with the next case */
 532
 533                                 case LDAP_SCOPE_BASE:
 534                                         /*
 535                                          * this target is no longer candidate
 536                                          */
 537                                         lsc->candidate = META_NOT_CANDIDATE;
 538                                         continue;
 539                                 }
 540                         }
 541
 542                         /*
 543                          * Rewrite the search base, if required
 544                          */
 545
 546                         rewriteSession(li->targets[i]->rwmap.rwm_rw,
 547                                         "searchBase",
 548                                         realbase, op->o_conn, &mbase, result);
 549
 550                         if (result->type != SUCCESS)
 551                                 goto Catch;
 552
 553                         if ( mbase == NULL ) {
 554                                 mbase = realbase;
 555                         }
 556
 557                         /*
 558                          * Rewrite the search filter, if required
 559                          */
 560                         rewriteSession( li->targets[i]->rwmap.rwm_rw,
 561                                         "searchFilter",
 562                                         op->ors_filterstr.bv_val, op->o_conn,
 563                                         &mfilter.bv_val, result);
 564                         if (result->type != SUCCESS)
 565                                 goto Catch;
 566
 567                         if ( mfilter.bv_val != NULL && mfilter.bv_val[ 0 ]
 568                                                                 != '\0') {
 569                                 mfilter.bv_len = strlen( mfilter.bv_val );
 570                         } else {
 571                                 if ( mfilter.bv_val != NULL ) {
 572                                         free( mfilter.bv_val );
 573                                 }
 574                                 mfilter = op->ors_filterstr;
 575                         }
 576
 577 #if 0
 578                         /*
 579                          * Maps attributes in filter
 580                          */
 581                         mapped_filter = ldap_back_map_filter(
 582                                         &li->targets[i]->rwmap.rwm_at,
 583                                         &li->targets[i]->rwmap.rwm_oc,
 584                                         &mfilter, 0 );
 585                         if ( mapped_filter == NULL ) {
 586                                 mapped_filter = ( char * )mfilter.bv_val;
 587                         } else {
 588                                 if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 589                                         free( mfilter.bv_val );
 590                                 }
 591                         }
 592                         mfilter.bv_val = NULL;
 593                         mfilter.bv_len = 0;
 594 #else
 595                         mapped_filter = (char *) mfilter.bv_val;
 596 #endif
 597
 598                         /*
 599                          * Maps required attributes
 600                          */
 601                         if ( ldap_back_map_attrs(
 602                                         &li->targets[ i ]->rwmap.rwm_at,
 603                                         new_attrs, 0, &mapped_attrs ) ) {
 604                                 goto Catch;
 605                         }
 606
 607                         /*
 608                          * Starts the search
 609                          */
 610                         msgid[ i ] = ldap_search( lsc->ld, mbase, realscope,
 611                                                 mapped_filter, mapped_attrs,
 612                                                 op->ors_attrsonly );
 613                         if ( msgid[ i ] == -1 ) {
 614                                 lsc->candidate = META_NOT_CANDIDATE;
 615                                 continue;
 616                         }
 617
 618                         if ( mapped_attrs ) {
 619                                 free( mapped_attrs );
 620                                 mapped_attrs = NULL;
 621                         }
 622
 623                         if ( mapped_filter != op->ors_filterstr.bv_val ) {
 624                                 free( mapped_filter );
 625                                 mapped_filter = NULL;
 626                         }
 627
 628                         if ( mbase != realbase ) {
 629                                 free( mbase );
 630                                 mbase = NULL;
 631                         }
 632
 633                         ++candidates;
 634                 }
 635
 636                 num_entries = handleLdapResult(lc, op, rs, msgid,
 637                                 op->o_bd, attrs,
 638                                 op->ors_attrsonly, candidates,
 639                                 cacheable, &entry_array,
 640                                 curr_limit, op->ors_slimit, result);
 641
 642                 if (result->type != SUCCESS)
 643                         goto Catch;
 644                 if (cacheable && (num_entries <= curr_limit)) {
 645                         Operation       op_tmp = *op;
 646
 647 #ifdef NEW_LOGGING
 648                         LDAP_LOG( BACK_META, DETAIL1,
 649                                         "QUERY CACHEABLE\n", 0, 0, 0 );
 650 #else /* !NEW_LOGGING */
 651                         Debug( LDAP_DEBUG_ANY, "QUERY CACHEABLE\n", 0, 0, 0 );
 652 #endif /* !NEW_LOGGING */
 653                         op_tmp.o_bd = li->glue_be;
 654                         uuid = cache_entries(&op_tmp, rs, entry_array,
 655                                         cm, result);
 656 #ifdef NEW_LOGGING
 657                         LDAP_LOG( BACK_META, DETAIL1,
 658                                         "Added query %s UUID %s ENTRIES %d\n",
 659                                         op->ors_filterstr.bv_val,
 660                                         uuid, num_entries );
 661 #else /* !NEW_LOGGING */
 662                         Debug( LDAP_DEBUG_ANY,
 663                                         "Added query %s UUID %s ENTRIES %d\n",
 664                                         op->ors_filterstr.bv_val,
 665                                         uuid, num_entries );
 666 #endif /* !NEW_LOGGING */
 667
 668                         if (result->type != SUCCESS)
 669                                 goto Catch;
 670                         (*(qm->addfunc))(qm, &query, template_id, uuid, result);
 671                         if (result->type != SUCCESS)
 672                                 goto Catch;
 673                         filter = 0;
 674                         attrs = 0;
 675                 }
 676         }
 677
 678 Catch:;
 679         switch (result->type) {
 680                 case SUCCESS:
 681                         rc = 0;
 682                         break;
 683
 684                 case FILTER_ERR:
 685 #ifdef NEW_LOGGING
 686                         LDAP_LOG( BACK_META, DETAIL1,
 687                                         "Invalid template error\n", 0, 0, 0 );
 688 #else /* !NEW_LOGGING */
 689                         Debug( LDAP_DEBUG_ANY, "Invalid template error\n",
 690                                         0, 0, 0 );
 691 #endif /* !NEW_LOGGING */
 692                         break;
 693
 694                 case CONN_ERR:
 695                         rc = -1;
 696 #ifdef NEW_LOGGING
 697                         LDAP_LOG( BACK_META, DETAIL1,
 698                                 "Could not connect to a remote server\n",
 699                                 0, 0, 0 );
 700 #else /* !NEW_LOGGING */
 701                         Debug( LDAP_DEBUG_ANY,
 702                                 "Could not connect to a remote server\n",
 703                                 0, 0, 0 );
 704 #endif /* !NEW_LOGGING */
 705                         send_ldap_error(op, rs, LDAP_OTHER,
 706                                         "Connection error" );
 707                         break;
 708
 709                 case RESULT_ERR:
 710                         rc = -1;
 711 #ifdef NEW_LOGGING
 712                         LDAP_LOG( BACK_META, DETAIL1,
 713                                 "Error in handling ldap_result\n", 0, 0, 0 );
 714 #else /* !NEW_LOGGING */
 715                         Debug( LDAP_DEBUG_ANY,
 716                                 "Error in handling ldap_result\n", 0, 0, 0 );
 717 #endif /* !NEW_LOGGING */
 718                         break;
 719
 720                 case REWRITING_ERR:
 721                         rc = -1;
 722                         if (result->rc == REWRITE_REGEXEC_UNWILLING) {
 723                                 send_ldap_error( op, rs,
 724                                                 LDAP_UNWILLING_TO_PERFORM,
 725                                                 "Unwilling to perform" );
 726                         } else {
 727                                 send_ldap_error( op, rs, LDAP_OTHER,
 728                                                 "Rewrite error" );
 729                         }
 730                         break;
 731
 732                 case MERGE_ERR:
 733                         rc = -1;
 734 #ifdef NEW_LOGGING
 735                         LDAP_LOG( BACK_META, DETAIL1,
 736                                 "Error in merging entry \n", 0, 0, 0 );
 737 #else /* !NEW_LOGGING */
 738                         Debug( LDAP_DEBUG_ANY,
 739                                 "Error in merging entry \n", 0, 0, 0 );
 740 #endif /* !NEW_LOGGING */
 741                         break;
 742
 743                 case REMOVE_ERR:
 744                         rc = -1;
 745 #ifdef NEW_LOGGING
 746                         LDAP_LOG( BACK_META, DETAIL1,
 747                                         "Error in removing query \n",
 748                                         0, 0, 0 );
 749 #else /* !NEW_LOGGING */
 750                         Debug( LDAP_DEBUG_ANY, "Error in removing query \n",
 751                                         0, 0, 0 );
 752 #endif /* !NEW_LOGGING */
 753                         break;
 754
 755                 default:
 756                         /* assert(0); */
 757                         break;
 758         }
 759
 760         ldap_pvt_thread_mutex_lock(&cm->consistency_mutex);
 761         curr_time = slap_get_time();
 762         if (curr_time - cm->consistency_time > cm->consistency_cycle_time) {
 763                 cm->consistency_time = curr_time;
 764                 consistency_check(op, rs, li->glue_be);
 765         }
 766         ldap_pvt_thread_mutex_unlock(&cm->consistency_mutex);
 767
 768         if ( msgid ) {
 769                 ch_free( msgid );
 770         }
 771         if (entry_array)  {
 772                 for (i=0; (e = entry_array[i]); i++) {
 773                         entry_free(e);
 774                 }
 775                 free(entry_array);
 776         }
 777         if (filter)
 778                 filter_free(filter);
 779
 780         if (new_attrs) {
 781                 if (new_attrs != attrs)
 782                         free(new_attrs);
 783         }
 784
 785         if (attrs)
 786                 free(attrs);
 787
 788         if (tempstr.bv_val ) {
 789                 free(tempstr.bv_val);
 790         }
 791         ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
 792         cm->threads--;
 793 #ifdef NEW_LOGGING
 794         LDAP_LOG( BACK_META, DETAIL1, "Threads-- = %d\n", cm->threads, 0, 0 );
 795 #else /* !NEW_LOGGING */
 796         Debug( LDAP_DEBUG_ANY, "Threads-- = %d\n", cm->threads, 0, 0 );
 797 #endif /* !NEW_LOGGING */
 798         ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
 799         return rc;
 800 }
 801
 802
 803 static Entry*
 804 meta_create_entry (
 805         Backend                 *be,
 806         struct metaconn         *lc,
 807         int                     target,
 808         LDAPMessage             *e,
 809         struct exception*       result
 810 )
 811 {
 812         struct metainfo         *li = ( struct metainfo * )be->be_private;
 813         struct berval           a, mapped;
 814         Entry*                  ent;
 815         BerElement              ber = *e->lm_ber;
 816         Attribute               *attr, **attrp;
 817         struct berval           dummy = { 0, NULL };
 818         struct berval           *bv, bdn;
 819         const char              *text;
 820         char*                   ename = NULL;
 821         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
 822                 result->type = CREATE_ENTRY_ERR;
 823                 return NULL;
 824         }
 825         ent = (Entry*)malloc(sizeof(Entry));
 826
 827         /*
 828          * Rewrite the dn of the result, if needed
 829          */
 830         rewriteSession( li->targets[ target ]->rwmap.rwm_rw, "searchResult",
 831                         bdn.bv_val, lc->conn, &ent->e_name.bv_val, result );
 832
 833         if (result->type != SUCCESS) {
 834                 return NULL;
 835         }
 836         if ( ent->e_name.bv_val == NULL ) {
 837                 ber_dupbv(&(ent->e_name), &bdn);
 838         } else {
 839 #ifdef NEW_LOGGING
 840                 LDAP_LOG( BACK_META, DETAIL1,
 841                         "[rw] searchResult[%d]: \"%s\" -> \"%s\"\n",
 842                         target, bdn.bv_val, ent->e_name.bv_val );
 843 #else /* !NEW_LOGGING */
 844                 Debug( LDAP_DEBUG_ARGS, "rw> searchResult[%d]: \"%s\""
 845                         " -> \"%s\"\n",
 846                         target, bdn.bv_val, ent->e_name.bv_val );
 847 #endif /* !NEW_LOGGING */
 848                 ent->e_name.bv_len = strlen( ent->e_name.bv_val );
 849         }
 850
 851         /*
 852          * Note: this may fail if the target host(s) schema differs
 853          * from the one known to the meta, and a DN with unknown
 854          * attributes is returned.
 855          *
 856          * FIXME: should we log anything, or delegate to dnNormalize?
 857          */
 858         dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname, NULL );
 859
 860         /*
 861         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname )
 862                 != LDAP_SUCCESS )
 863         {
 864                 return LDAP_INVALID_DN_SYNTAX;
 865         }
 866         */
 867
 868         /*
 869          * cache dn
 870          */
 871         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 872                 meta_dncache_update_entry( &li->cache, &ent->e_nname, target );
 873         }
 874
 875         ent->e_id = 0;
 876         ent->e_attrs = 0;
 877         ent->e_private = 0;
 878         ent->e_bv.bv_val = 0;
 879
 880         attrp = &ent->e_attrs;
 881
 882         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 883                 ldap_back_map( &li->targets[ target ]->rwmap.rwm_at,
 884                                 &a, &mapped, 1 );
 885                 if ( mapped.bv_val == NULL ) {
 886                         continue;
 887                 }
 888                 attr = ( Attribute * )ch_malloc( sizeof( Attribute ) );
 889                 if ( attr == NULL ) {
 890                         continue;
 891                 }
 892                 attr->a_flags = 0;
 893                 attr->a_next = 0;
 894                 attr->a_desc = NULL;
 895                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text ) != LDAP_SUCCESS) {
 896                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text )
 897                                         != LDAP_SUCCESS) {
 898 #ifdef NEW_LOGGING
 899                                 LDAP_LOG( BACK_META, DETAIL1,
 900                                         "slap_bv2undef_ad(%s): %s\n",
 901                                         mapped.bv_val, text, 0 );
 902 #else /* !NEW_LOGGING */
 903                                 Debug( LDAP_DEBUG_ANY,
 904                                         "slap_bv2undef_ad(%s): "
 905                                         "%s\n%s", mapped.bv_val, text, "" );
 906 #endif /* !NEW_LOGGING */
 907                                 ch_free( attr );
 908                                 continue;
 909                         }
 910                 }
 911
 912                 /* no subschemaSubentry */
 913                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 914                         ch_free(attr);
 915                         continue;
 916                 }
 917
 918                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 919                                 || attr->a_vals == NULL ) {
 920                         attr->a_vals = &dummy;
 921                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass ||
 922                                 attr->a_desc ==
 923                                 slap_schema.si_ad_structuralObjectClass) {
 924                         int i, last;
 925                         for ( last = 0; attr->a_vals[ last ].bv_val; ++last )
 926                                 ;
 927                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++,i++ ) {
 928                                 ldap_back_map( &li->targets[ target]->rwmap.rwm_oc,
 929                                                 bv, &mapped, 1 );
 930                                 if ( mapped.bv_val == NULL ) {
 931                                         free( bv->bv_val );
 932                                         bv->bv_val = NULL;
 933                                         if ( --last < 0 ) {
 934                                                 break;
 935                                         }
 936                                         *bv = attr->a_vals[ last ];
 937                                         attr->a_vals[ last ].bv_val = NULL;
 938                                         i--;
 939                                 } else if ( mapped.bv_val != bv->bv_val ) {
 940                                         free( bv->bv_val );
 941                                         ber_dupbv( bv, &mapped );
 942                                 }
 943                         }
 944                 /*
 945                  * It is necessary to try to rewrite attributes with
 946                  * dn syntax because they might be used in ACLs as
 947                  * members of groups; since ACLs are applied to the
 948                  * rewritten stuff, no dn-based subecj clause could
 949                  * be used at the ldap backend side (see
 950                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 951                  * The problem can be overcome by moving the dn-based
 952                  * ACLs to the target directory server, and letting
 953                  * everything pass thru the ldap backend.
 954                  */
 955                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 956                                 SLAPD_DN_SYNTAX ) == 0 ) {
 957                         int i;
 958                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++,i++ ) {
 959                                 char *newval;
 960                                 rewriteSession(li->targets[ target ]->rwmap.rwm_rw,
 961                                                 "searchResult", bv->bv_val,
 962                                                 lc->conn, &newval, result);
 963                                 if (result->type != SUCCESS) {
 964                                         /* FIXME : Handle error */
 965                                         result->type = SUCCESS;
 966                                 } else {
 967                                         /* left as is */
 968                                         if ( newval == NULL ) {
 969                                                 break;
 970                                         }
 971 #ifdef NEW_LOGGING
 972                                         LDAP_LOG( BACK_META, DETAIL1,
 973                                                 "[rw] searchResult on "
 974                                                 "attr=%s: \"%s\" -> \"%s\"\n",
 975                                                 attr->a_desc->ad_type->
 976                                                 sat_cname.bv_val,
 977                                                 bv->bv_val, newval );
 978 #else /* !NEW_LOGGING */
 979                                         Debug( LDAP_DEBUG_ARGS,
 980                                                 "rw> searchResult on attr=%s:"
 981                                                 " \"%s\" -> \"%s\"\n",
 982                                                 attr->a_desc->ad_type->
 983                                                 sat_cname.bv_val,
 984                                                 bv->bv_val, newval );
 985 #endif /* !NEW_LOGGING */
 986                                         free( bv->bv_val );
 987                                         bv->bv_val = newval;
 988                                         bv->bv_len = strlen( newval );
 989                                 }
 990                         }
 991                 }
 992                 *attrp = attr;
 993                 attrp = &attr->a_next;
 994         }
 995         return ent;
 996 }
 997
 998 static int
 999 is_one_level_rdn(
1000         const char      *rdn,
1001         int             from
1002 )
1003 {
1004         for ( ; from--; ) {
1005                 if ( DN_SEPARATOR( rdn[ from ] ) ) {
1006                         return 0;
1007                 }
1008         }
1009         return 1;
1010 }
1011
1012 static struct metaconn*
1013 metaConnect(
1014         Operation*              op,
1015         SlapReply               *rs,
1016         int                     op_type,
1017         struct berval           *nbase,
1018         struct exception        *result)
1019 {
1020         struct metaconn         *lc;
1021
1022         result->type = SUCCESS;
1023         lc = meta_back_getconn( op, rs, op_type, nbase, NULL );
1024         if (!lc) {
1025                 result->type = CONN_ERR;
1026                 return 0;
1027         }
1028         return lc;
1029 }
1030
1031 static void
1032 add_filter_attrs(
1033         AttributeName** new_attrs,
1034         AttributeName* attrs,
1035         AttributeName* filter_attrs )
1036 {
1037         struct berval all_user = { sizeof(LDAP_ALL_USER_ATTRIBUTES) -1,
1038                                    LDAP_ALL_USER_ATTRIBUTES };
1039
1040         struct berval all_op = { sizeof(LDAP_ALL_OPERATIONAL_ATTRIBUTES) -1,
1041                                         LDAP_ALL_OPERATIONAL_ATTRIBUTES};
1042
1043         int alluser = 0;
1044         int allop = 0;
1045         int i;
1046         int count;
1047
1048         /* duplicate attrs */
1049         for (count=0; attrs[count].an_name.bv_val; count++)
1050                 ;
1051         *new_attrs =  (AttributeName*)(malloc((count+1)*sizeof(AttributeName)));
1052         for (i=0; i<count; i++) {
1053                 /*
1054                 ber_dupbv(&((*new_attrs)[i].an_name), &(attrs[i].an_name));
1055                 */
1056                 (*new_attrs)[i].an_name = attrs[i].an_name;
1057                 (*new_attrs)[i].an_desc = attrs[i].an_desc;
1058         }
1059         (*new_attrs)[count].an_name.bv_val = NULL;
1060         (*new_attrs)[count].an_name.bv_len = 0;
1061
1062
1063         if ((*new_attrs)[0].an_name.bv_val == NULL) {
1064                 *new_attrs = (AttributeName*)(malloc(2*sizeof(AttributeName)));
1065                 (*new_attrs)[0].an_name.bv_val = "*";
1066                 (*new_attrs)[0].an_name.bv_len = 1;
1067                 (*new_attrs)[1].an_name.bv_val = NULL;
1068                 (*new_attrs)[1].an_name.bv_len = 0;
1069                 alluser = 1;
1070                 count = 1;
1071         } else {
1072                 alluser = an_find(*new_attrs, &all_user);
1073                 allop = an_find(*new_attrs, &all_op);
1074         }
1075
1076         for ( i=0; filter_attrs[i].an_name.bv_val; i++ ) {
1077                 if ( an_find(*new_attrs, &filter_attrs[i].an_name ))
1078                         continue;
1079                 if ( is_at_operational(filter_attrs[i].an_desc->ad_type)
1080                                                 && allop )
1081                         continue;
1082                 else if (alluser)
1083                         continue;
1084                 *new_attrs = (AttributeName*)(realloc(*new_attrs,
1085                                         (count+2)*sizeof(AttributeName)));
1086                 (*new_attrs)[count].an_name.bv_val =
1087                                 filter_attrs[i].an_name.bv_val;
1088                 (*new_attrs)[count].an_name.bv_len =
1089                                 filter_attrs[i].an_name.bv_len;
1090                 (*new_attrs)[count].an_desc = filter_attrs[i].an_desc;
1091                 (*new_attrs)[count+1].an_name.bv_val = NULL;
1092                 (*new_attrs)[count+1].an_name.bv_len = 0;
1093                 count++;
1094         }
1095 }
1096
1097 static int
1098 handleLdapResult(
1099         struct metaconn* lc,
1100         Operation* op,
1101         SlapReply *rs,
1102         int* msgid, Backend* be,
1103         AttributeName* attrs,
1104         int attrsonly,
1105         int candidates,
1106         int cacheable,
1107         Entry*** entry_array,
1108         int curr_limit,
1109         int slimit,
1110         struct exception* result)
1111 {
1112         Entry  *entry;
1113         char *match = NULL, *err = NULL, *cache_ename = NULL;
1114         int sres;
1115         int mres = LDAP_SUCCESS;
1116         int num_entries = 0, count, i, rc;
1117         struct timeval tv = {0, 0};
1118         struct metasingleconn* lsc;
1119         struct metainfo         *li = ( struct metainfo * )be->be_private;
1120         result->rc = 0;
1121         result->type = SUCCESS;
1122
1123         for ( count = 0, rc = 0; candidates > 0; ) {
1124                 int ab, gotit = 0;
1125
1126                 /* check for abandon */
1127                 ab = op->o_abandon;
1128
1129                 for ( i = 0, lsc = lc->conns; !META_LAST(lsc); lsc++, i++ ) {
1130                         if ( lsc->candidate != META_CANDIDATE ) {
1131                                 continue;
1132                         }
1133
1134                         if ( ab ) {
1135                                 ldap_abandon( lsc->ld, msgid[ i ] );
1136                                 result->type = ABANDON_ERR;
1137                                 break;
1138                         }
1139
1140                         if ( slimit > 0 && num_entries == slimit ) {
1141                                 result->type = SLIMIT_ERR;
1142                                 break;
1143                         }
1144
1145                         if ((entry = get_result_entry(be, lc, lsc,
1146                                                 msgid, i, &tv, result))) {
1147                                 rs->sr_entry = entry;
1148                                 send_search_entry( op, rs );
1149                                 rs->sr_entry = NULL;
1150                                 if ((cacheable) &&
1151                                                 (num_entries < curr_limit))  {
1152                                         rewriteSession( li->rwinfo,
1153                                                         "cacheResult",
1154                                                         entry->e_name.bv_val,
1155                                                         lc->conn,
1156                                                         &cache_ename, result );
1157                                         free(entry->e_name.bv_val);
1158                                         if (result->type != SUCCESS) {
1159                                                 return 0;
1160                                         }
1161                                         ber_str2bv(cache_ename,
1162                                                 strlen(cache_ename),
1163                                                 0, &entry->e_name);
1164                                         ber_dupbv(&entry->e_nname,
1165                                                 &entry->e_name);
1166                                         *entry_array = (Entry**)realloc(
1167                                                         *entry_array,
1168                                                         (( num_entries+2 ) *
1169                                                          sizeof( Entry* )));
1170                                         (*entry_array)[num_entries] = entry;
1171                                         (*entry_array)[num_entries+1] = NULL;
1172                                 }
1173                                 num_entries++;
1174                                 gotit = 1;
1175                         } else if (result->type == REWRITING_ERR) {
1176                                 return 0;
1177                         } else if (result->type == TIMEOUT_ERR) {
1178                                 result->type = SUCCESS;
1179                                 continue;
1180                         } else if (result->type == CREATE_ENTRY_ERR) {
1181                                 break;
1182                         } else if (result->rc == -1) {
1183                                 break;
1184                         } else {
1185                                 rs->sr_err = result->rc;
1186                                 sres = ldap_back_map_result(rs);
1187                                 if (mres == LDAP_SUCCESS &&
1188                                                 sres != LDAP_SUCCESS) {
1189                                         mres = sres;
1190                                         ldap_get_option(lsc->ld,
1191                                                 LDAP_OPT_ERROR_STRING, &err);
1192                                         ldap_get_option(lsc->ld,
1193                                                 LDAP_OPT_MATCHED_DN, &match);
1194                                 }
1195                                 lsc->candidate = META_NOT_CANDIDATE;
1196                                 candidates--;
1197                                 result->type = SUCCESS;
1198                         }
1199                 }
1200                 switch (result->type) {
1201                 case RESULT_ERR:
1202 #ifdef NEW_LOGGING
1203                         LDAP_LOG( BACK_META, DETAIL1,
1204                                         "ldap_result error, rc = -1\n",
1205                                         0, 0, 0 );
1206 #else /* !NEW_LOGGING */
1207                         Debug( LDAP_DEBUG_ANY, "ldap_result error, rc = -1\n",
1208                                         0, 0, 0 );
1209 #endif /* !NEW_LOGGING */
1210                         rs->sr_err = LDAP_OTHER;
1211                         send_ldap_result( op, rs );
1212                         return 0;
1213
1214                 case CREATE_ENTRY_ERR:
1215 #ifdef NEW_LOGGING
1216                         LDAP_LOG( BACK_META, DETAIL1,
1217                                         "Error in parsing result \n",
1218                                         0, 0, 0 );
1219 #else /* !NEW_LOGGING */
1220                         Debug( LDAP_DEBUG_ANY, "Error in parsing result \n",
1221                                         0, 0, 0 );
1222 #endif /* !NEW_LOGGING */
1223                         rs->sr_err = LDAP_OTHER;
1224                         send_ldap_result( op, rs );
1225                         result->type = RESULT_ERR;
1226                         return 0;
1227
1228                 case SLIMIT_ERR:
1229 #ifdef NEW_LOGGING
1230                         LDAP_LOG( BACK_META, DETAIL1, "Size limit exceeded \n",
1231                                         0, 0, 0 );
1232 #else /* !NEW_LOGGING */
1233                         Debug( LDAP_DEBUG_ANY, "Size limit exceeded \n",
1234                                         0, 0, 0 );
1235 #endif /* !NEW_LOGGING */
1236                         rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1237                         send_ldap_result( op, rs );
1238                         result->type = RESULT_ERR;
1239                         return 0;
1240
1241                 case ABANDON_ERR:
1242 #ifdef NEW_LOGGING
1243                         LDAP_LOG( BACK_META, DETAIL1,
1244                                         "search operation abandoned \n",
1245                                         0, 0, 0 );
1246 #else /* !NEW_LOGGING */
1247                         Debug( LDAP_DEBUG_ANY, "search operation abandoned \n",
1248                                         0, 0, 0 );
1249 #endif /* !NEW_LOGGING */
1250                         result->type = RESULT_ERR;
1251                         return 0;
1252
1253                 default:
1254                         /* assert( 0 ); */
1255                         break;
1256                 }
1257                 if ( gotit == 0 ) {
1258                         tv.tv_sec = 0;
1259                         tv.tv_usec = 100000;
1260                         ldap_pvt_thread_yield();
1261                 } else {
1262                         tv.tv_sec = 0;
1263                         tv.tv_usec = 0;
1264                 }
1265         }
1266
1267         rs->sr_err = mres;
1268         rs->sr_text = err;
1269         rs->sr_matched = match;
1270
1271         send_ldap_result( op, rs );
1272
1273         rs->sr_text = NULL;
1274         rs->sr_matched = NULL;
1275
1276         if (err)
1277                 free(err);
1278
1279         if (match)
1280                 free(match);
1281
1282         result->type = (mres == LDAP_SUCCESS) ? SUCCESS : RESULT_ERR;
1283         return num_entries;
1284 }
1285
1286 static Entry*
1287 get_result_entry(
1288         Backend* be,
1289         struct metaconn* lc,
1290         struct metasingleconn* lsc,
1291         int* msgid,
1292         int i,
1293         struct timeval* tv,
1294         struct exception* result)
1295 {
1296         Entry* entry;
1297         LDAPMessage     *res, *e;
1298         int rc;
1299         int sres = LDAP_SUCCESS;
1300
1301         rc = ldap_result( lsc->ld, msgid[ i ],
1302                         0, tv, &res );
1303
1304         if ( rc == 0 ) {
1305                 result->type = TIMEOUT_ERR;
1306                 return NULL;
1307         } else if ( rc == -1 ) {
1308                 result->rc = -1;
1309                 result->type = RESULT_ERR;
1310                 return NULL;
1311         } else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
1312                 e = ldap_first_entry( lsc->ld, res );
1313                 entry = meta_create_entry(be, lc, i, e, result);
1314                 if (!entry) {
1315                         return NULL;
1316                 }
1317                 ldap_msgfree( res );
1318                 result->type = SUCCESS;
1319                 return entry;
1320         } else {
1321                 sres = ldap_result2error( lsc->ld,
1322                                 res, 1 );
1323                 result->rc = sres;
1324                 result->type = RESULT_ERR;
1325                 return NULL;
1326         }
1327 }
1328
1329 static void
1330 rewriteSession(
1331         struct rewrite_info* info,
1332         const char* rewriteContext,
1333         const char* string,
1334         const void* cookie,
1335         char** base,
1336         struct exception* result)
1337 {
1338         int rc = rewrite_session(info, rewriteContext, string, cookie, base);
1339         if (rc != REWRITE_REGEXEC_OK) {
1340                 result->rc = rc;
1341                 result->type = REWRITING_ERR;
1342
1343                 if (strcmp(rewriteContext, "searchBase") == 0)
1344 #ifdef NEW_LOGGING
1345                         LDAP_LOG( BACK_META, DETAIL1,
1346                                 "Problem in rewriting search base\n", 0, 0, 0 );
1347 #else /* !NEW_LOGGING */
1348                         Debug( LDAP_DEBUG_ANY,
1349                                 "Problem in rewriting search base\n", 0, 0, 0 );
1350 #endif /* !NEW_LOGGING */
1351                 if (strcmp(rewriteContext, "searchFilter") == 0)
1352 #ifdef NEW_LOGGING
1353                         LDAP_LOG( BACK_META, DETAIL1,
1354                                 "Problem in rewriting search filter\n",
1355                                 0, 0, 0 );
1356 #else /* !NEW_LOGGING */
1357                         Debug( LDAP_DEBUG_ANY,
1358                                 "Problem in rewriting search filter\n",
1359                                 0, 0, 0 );
1360 #endif /* !NEW_LOGGING */
1361                 if (strcmp(rewriteContext, "searchResult") == 0)
1362 #ifdef NEW_LOGGING
1363                         LDAP_LOG( BACK_META, DETAIL1,
1364                                 "Problem in rewriting DN, or DN syntax "
1365                                 "attributes of search result\n", 0, 0, 0 );
1366 #else /* !NEW_LOGGING */
1367                         Debug( LDAP_DEBUG_ANY,
1368                                 "Problem in rewriting DN, or DN syntax "
1369                                 "attributes of search result\n", 0, 0, 0 );
1370 #endif /* !NEW_LOGGING */
1371                 if (strcmp(rewriteContext, "cacheBase") == 0)
1372 #ifdef NEW_LOGGING
1373                         LDAP_LOG( BACK_META, DETAIL1,
1374                                 "Problem in rewriting search base with "
1375                                 "cache base\n", 0, 0, 0 );
1376 #else /* !NEW_LOGGING */
1377                         Debug( LDAP_DEBUG_ANY,
1378                                 "Problem in rewriting search base with "
1379                                 "cache base\n", 0, 0, 0 );
1380 #endif /* !NEW_LOGGING */
1381                 if (strcmp(rewriteContext, "cacheResult") == 0)
1382 #ifdef NEW_LOGGING
1383                         LDAP_LOG( BACK_META, DETAIL1,
1384                                 "Problem in rewriting DN for cached entries\n",
1385                                 0, 0, 0 );
1386 #else /* !NEW_LOGGING */
1387                         Debug( LDAP_DEBUG_ANY,
1388                                 "Problem in rewriting DN for cached entries\n",
1389                                 0, 0, 0 );
1390 #endif /* !NEW_LOGGING */
1391                 if (strcmp(rewriteContext, "cacheReturn") == 0)
1392 #ifdef NEW_LOGGING
1393                         LDAP_LOG( BACK_META, DETAIL1,
1394                                 "Problem in rewriting DN for answerable "
1395                                 "entries\n", 0, 0, 0 );
1396 #else /* !NEW_LOGGING */
1397                         Debug( LDAP_DEBUG_ANY,
1398                                 "Problem in rewriting DN for answerable "
1399                                 "entries\n", 0, 0, 0 );
1400 #endif /* !NEW_LOGGING */
1401         } else {
1402                 result->type = SUCCESS;
1403         }
1404 }
1405
1406 static int
1407 get_attr_set(
1408         AttributeName* attrs,
1409         query_manager* qm,
1410         int num )
1411 {
1412         int i;
1413         for (i=0; i<num; i++) {
1414                 if (attrscmp(attrs, qm->attr_sets[i].attrs))
1415                         return i;
1416         }
1417         return -1;
1418 }
1419
1420 static int
1421 attrscmp(
1422         AttributeName* attrs_in,
1423         AttributeName* attrs)
1424 {
1425         int i, count1, count2;
1426         if ((attrs_in==NULL) || (attrs==NULL))
1427                 return 1;
1428         for ( count1=0;
1429               attrs_in && attrs_in[count1].an_name.bv_val != NULL;
1430               count1++ )
1431                 ;
1432         for ( count2=0;
1433               attrs && attrs[count2].an_name.bv_val != NULL;
1434               count2++)
1435                 ;
1436         if ( count1 != count2 )
1437                 return 0;
1438
1439         for ( i=0; i<count1; i++ ) {
1440                 if ( !an_find(attrs, &attrs_in[i].an_name ))
1441                         return 0;
1442         }
1443         return 1;
1444 }
1445
1446 static char*
1447 cache_entries(
1448         Operation       *op,
1449         SlapReply       *rs,
1450         Entry** entry_array,
1451         cache_manager* cm,
1452         struct exception* result)
1453 {
1454         int             i;
1455         int             return_val;
1456         int             cache_size;
1457         Entry           *e;
1458         struct berval   query_uuid;
1459         struct berval   crp_uuid;
1460         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ], *crpid;
1461         char            crpuuid[40];
1462         query_manager   *qm = cm->qm;
1463
1464         result->type = SUCCESS;
1465         query_uuid.bv_len = lutil_uuidstr(uuidbuf, sizeof(uuidbuf));
1466         query_uuid.bv_val = ch_strdup(uuidbuf);
1467
1468 #ifdef NEW_LOGGING
1469         LDAP_LOG( BACK_META, DETAIL1, "UUID for query being added = %s\n",
1470                         uuidbuf, 0, 0 );
1471 #else /* !NEW_LOGGING */
1472         Debug( LDAP_DEBUG_ANY, "UUID for query being added = %s\n",
1473                         uuidbuf, 0, 0 );
1474 #endif /* !NEW_LOGGING */
1475
1476         for ( i=0; ( entry_array && (e=entry_array[i]) ); i++ ) {
1477 #ifdef NEW_LOGGING
1478                 LDAP_LOG( BACK_META, DETAIL2, "LOCKING REMOVE MUTEX\n",
1479                                 0, 0, 0 );
1480 #else /* !NEW_LOGGING */
1481                 Debug( LDAP_DEBUG_NONE, "LOCKING REMOVE MUTEX\n", 0, 0, 0 );
1482 #endif /* !NEW_LOGGING */
1483                 ldap_pvt_thread_mutex_lock(&cm->remove_mutex);
1484 #ifdef NEW_LOGGING
1485                 LDAP_LOG( BACK_META, DETAIL2, "LOCKED REMOVE MUTEX\n", 0, 0, 0);
1486 #else /* !NEW_LOGGING */
1487                 Debug( LDAP_DEBUG_NONE, "LOCKED REMOVE MUTEX\n", 0, 0, 0);
1488 #endif /* !NEW_LOGGING */
1489                 if ( cm->cache_size > (cm->thresh_hi) ) {
1490                         while(cm->cache_size > (cm->thresh_lo)) {
1491                                 crpid = cache_replacement(qm);
1492                                 if (crpid == NULL) {
1493                                         result->type = REMOVE_ERR;
1494                                 } else {
1495                                         strcpy(crpuuid, crpid);
1496                                         crp_uuid.bv_val = crpuuid;
1497                                         crp_uuid.bv_len = strlen(crpuuid);
1498 #ifdef NEW_LOGGING
1499                                         LDAP_LOG( BACK_META, DETAIL1,
1500                                                 "Removing query UUID %s\n",
1501                                                 crpuuid, 0, 0 );
1502 #else /* !NEW_LOGGING */
1503                                         Debug( LDAP_DEBUG_ANY,
1504                                                 "Removing query UUID %s\n",
1505                                                 crpuuid, 0, 0 );
1506 #endif /* !NEW_LOGGING */
1507                                         return_val = remove_query_data(op, rs,
1508                                                         &crp_uuid, result);
1509 #ifdef NEW_LOGGING
1510                                         LDAP_LOG( BACK_META, DETAIL1,
1511                                                 "QUERY REMOVED, SIZE=%d\n",
1512                                                 return_val, 0, 0);
1513 #else /* !NEW_LOGGING */
1514                                         Debug( LDAP_DEBUG_ANY,
1515                                                 "QUERY REMOVED, SIZE=%d\n",
1516                                                 return_val, 0, 0);
1517 #endif /* !NEW_LOGGING */
1518                                         ldap_pvt_thread_mutex_lock(
1519                                                         &cm->cache_mutex );
1520                                         cm->total_entries -= result->rc;
1521                                         cm->num_cached_queries--;
1522 #ifdef NEW_LOGGING
1523                                         LDAP_LOG( BACK_META, DETAIL1,
1524                                                 "STORED QUERIES = %lu\n",
1525                                                 cm->num_cached_queries, 0, 0 );
1526 #else /* !NEW_LOGGING */
1527                                         Debug( LDAP_DEBUG_ANY,
1528                                                 "STORED QUERIES = %lu\n",
1529                                                 cm->num_cached_queries, 0, 0 );
1530 #endif /* !NEW_LOGGING */
1531                                         ldap_pvt_thread_mutex_unlock(
1532                                                         &cm->cache_mutex );
1533                                         cm->cache_size = (return_val >
1534                                                 cm->cache_size) ?
1535                                                 0 : (cm->cache_size-return_val);
1536 #ifdef NEW_LOGGING
1537                                         LDAP_LOG( BACK_META, DETAIL1,
1538                                                 "QUERY REMOVED, CACHE SIZE="
1539                                                 "%lu bytes %d entries\n",
1540                                                 cm->cache_size,
1541                                                 cm->total_entries, 0 );
1542 #else /* !NEW_LOGGING */
1543                                         Debug( LDAP_DEBUG_ANY,
1544                                                 "QUERY REMOVED, CACHE SIZE="
1545                                                 "%lu bytes %d entries\n",
1546                                                 cm->cache_size,
1547                                                 cm->total_entries, 0 );
1548 #endif /* !NEW_LOGGING */
1549                                 }
1550                         }
1551                 }
1552
1553                 rs->sr_entry = e;
1554                 return_val = merge_entry(op, rs, &query_uuid, result);
1555                 rs->sr_entry = NULL;
1556                 cm->cache_size += return_val;
1557 #ifdef NEW_LOGGING
1558                 LDAP_LOG( BACK_META, DETAIL1,
1559                         "ENTRY ADDED/MERGED, CACHE SIZE=%lu bytes\n",
1560                         cm->cache_size, 0, 0 );
1561 #else /* !NEW_LOGGING */
1562                 Debug( LDAP_DEBUG_ANY,
1563                         "ENTRY ADDED/MERGED, CACHE SIZE=%lu bytes\n",
1564                         cm->cache_size, 0, 0 );
1565 #endif /* !NEW_LOGGING */
1566 #ifdef NEW_LOGGING
1567                 LDAP_LOG( BACK_META, DETAIL2, "UNLOCKING REMOVE MUTEX\n",
1568                                 0, 0, 0 );
1569 #else /* !NEW_LOGGING */
1570                 Debug( LDAP_DEBUG_NONE, "UNLOCKING REMOVE MUTEX\n", 0, 0, 0 );
1571 #endif /* !NEW_LOGGING */
1572                 ldap_pvt_thread_mutex_unlock(&cm->remove_mutex);
1573 #ifdef NEW_LOGGING
1574                 LDAP_LOG( BACK_META, DETAIL2, "UNLOCKED REMOVE MUTEX\n",
1575                                 0, 0, 0 );
1576 #else /* !NEW_LOGGING */
1577                 Debug( LDAP_DEBUG_NONE, "UNLOCKED REMOVE MUTEX\n", 0, 0, 0 );
1578 #endif /* !NEW_LOGGING */
1579                 if (result->type != SUCCESS)
1580                         return 0;
1581                 ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
1582                 cm->total_entries += result->rc;
1583 #ifdef NEW_LOGGING
1584                 LDAP_LOG( BACK_META, DETAIL1,
1585                         "ENTRY ADDED/MERGED, SIZE=%d, CACHED ENTRIES=%d\n",
1586                         return_val, cm->total_entries, 0 );
1587 #else /* !NEW_LOGGING */
1588                 Debug( LDAP_DEBUG_ANY,
1589                         "ENTRY ADDED/MERGED, SIZE=%d, CACHED ENTRIES=%d\n",
1590                         return_val, cm->total_entries, 0 );
1591 #endif /* !NEW_LOGGING */
1592                 ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
1593         }
1594         ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
1595         cm->num_cached_queries++;
1596 #ifdef NEW_LOGGING
1597         LDAP_LOG( BACK_META, DETAIL1, "STORED QUERIES = %lu\n",
1598                         cm->num_cached_queries, 0, 0 );
1599 #else /* !NEW_LOGGING */
1600         Debug( LDAP_DEBUG_ANY, "STORED QUERIES = %lu\n",
1601                         cm->num_cached_queries, 0, 0 );
1602 #endif /* !NEW_LOGGING */
1603         ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
1604
1605         return query_uuid.bv_val;
1606 }
1607
1608 static int
1609 is_temp_answerable(
1610         int attr_set,
1611         struct berval* tempstr,
1612         query_manager* qm,
1613         int template_id )
1614 {
1615         int i;
1616         int* id_array;
1617         char* str;
1618         int result = 0;
1619         i = qm->templates[template_id].attr_set_index;
1620         str = qm->templates[template_id].querystr;
1621
1622         if (attr_set == i) {
1623                 result = 1;
1624         } else {
1625                 id_array = qm->attr_sets[attr_set].ID_array;
1626
1627                 while (*id_array != -1) {
1628                         if (*id_array == i)
1629                                 result = 1;
1630                         id_array++;
1631                 }
1632         }
1633         if (!result)
1634                 return 0;
1635         if (strcasecmp(str, tempstr->bv_val) == 0)
1636                 return 1;
1637         return 0;
1638 }
1639
1640 static void
1641 consistency_check(Operation *op, SlapReply *rs, Backend* glue_be)
1642 {
1643         struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
1644         cache_manager*  cm = li->cm;
1645         query_manager* qm = cm->qm;
1646         CachedQuery* query, *query_prev;
1647         time_t curr_time;
1648         struct berval uuid;
1649         struct exception result;
1650         int i, return_val;
1651         QueryTemplate* templ;
1652         Backend         *be = op->o_bd;
1653
1654         op->o_bd = glue_be;
1655
1656         for (i=0; qm->templates[i].querystr; i++) {
1657                 templ = qm->templates + i;
1658                 query = templ->query_last;
1659                 curr_time = slap_get_time();
1660                 ldap_pvt_thread_mutex_lock(&cm->remove_mutex);
1661                 while (query && (query->expiry_time < curr_time)) {
1662                         ldap_pvt_thread_mutex_lock(&qm->lru_mutex);
1663                         remove_query(qm, query);
1664                         ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1665 #ifdef NEW_LOGGING
1666                         LDAP_LOG( BACK_META, DETAIL1, "Lock CR index = %d\n",
1667                                         i, 0, 0 );
1668 #else /* !NEW_LOGGING */
1669                         Debug( LDAP_DEBUG_ANY, "Lock CR index = %d\n",
1670                                         i, 0, 0 );
1671 #endif /* !NEW_LOGGING */
1672                         ldap_pvt_thread_rdwr_wlock(&templ->t_rwlock);
1673                         remove_from_template(query, templ);
1674 #ifdef NEW_LOGGING
1675                         LDAP_LOG( BACK_META, DETAIL1,
1676                                         "TEMPLATE %d QUERIES-- %d\n",
1677                                         i, templ->no_of_queries, 0 );
1678 #else /* !NEW_LOGGING */
1679                         Debug( LDAP_DEBUG_ANY, "TEMPLATE %d QUERIES-- %d\n",
1680                                         i, templ->no_of_queries, 0 );
1681 #endif /* !NEW_LOGGING */
1682 #ifdef NEW_LOGGING
1683                         LDAP_LOG( BACK_META, DETAIL1, "Unlock CR index = %d\n",
1684                                         i, 0, 0 );
1685 #else /* !NEW_LOGGING */
1686                         Debug( LDAP_DEBUG_ANY, "Unlock CR index = %d\n",
1687                                         i, 0, 0 );
1688 #endif /* !NEW_LOGGING */
1689                         ldap_pvt_thread_rdwr_wunlock(&templ->t_rwlock);
1690                         uuid.bv_val = query->q_uuid;
1691                         uuid.bv_len = strlen(query->q_uuid);
1692                         return_val = remove_query_data(op, rs, &uuid, &result);
1693 #ifdef NEW_LOGGING
1694                         LDAP_LOG( BACK_META, DETAIL1,
1695                                         "STALE QUERY REMOVED, SIZE=%d\n",
1696                                         return_val, 0, 0 );
1697 #else /* !NEW_LOGGING */
1698                         Debug( LDAP_DEBUG_ANY, "STALE QUERY REMOVED, SIZE=%d\n",
1699                                                 return_val, 0, 0 );
1700 #endif /* !NEW_LOGGING */
1701                         ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
1702                         cm->total_entries -= result.rc;
1703                         cm->num_cached_queries--;
1704 #ifdef NEW_LOGGING
1705                         LDAP_LOG( BACK_META, DETAIL1, "STORED QUERIES = %lu\n",
1706                                         cm->num_cached_queries, 0, 0 );
1707 #else /* !NEW_LOGGING */
1708                         Debug( LDAP_DEBUG_ANY, "STORED QUERIES = %lu\n",
1709                                         cm->num_cached_queries, 0, 0 );
1710 #endif /* !NEW_LOGGING */
1711                         ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
1712                         cm->cache_size = (return_val > cm->cache_size) ?
1713                                                 0: (cm->cache_size-return_val);
1714 #ifdef NEW_LOGGING
1715                         LDAP_LOG( BACK_META, DETAIL1,
1716                                 "STALE QUERY REMOVED, CACHE SIZE=%lu bytes %d "
1717                                 "entries\n", cm->cache_size,
1718                                 cm->total_entries, 0 );
1719 #else /* !NEW_LOGGING */
1720                         Debug( LDAP_DEBUG_ANY,
1721                                 "STALE QUERY REMOVED, CACHE SIZE=%lu bytes %d "
1722                                 "entries\n", cm->cache_size,
1723                                 cm->total_entries, 0 );
1724 #endif /* !NEW_LOGGING */
1725                         query_prev = query;
1726                         query = query->prev;
1727                         free_query(query_prev);
1728                 }
1729                 ldap_pvt_thread_mutex_unlock(&cm->remove_mutex);
1730         }
1731
1732         op->o_bd = be;
1733 }
1734
1735 static int
1736 cache_back_sentry(
1737         Operation* op,
1738         SlapReply *rs )
1739 {
1740         slap_callback           *cb = op->o_callback;
1741         struct metainfo         *li = ( struct metainfo * )op->o_bd->be_private;
1742
1743         char                    *ename = NULL;
1744         struct exception        result;
1745         struct berval           dn;
1746         struct berval           ndn;
1747
1748         dn = rs->sr_entry->e_name;
1749         ndn = rs->sr_entry->e_nname;
1750
1751         rewriteSession( li->rwinfo, "cacheReturn",
1752                         rs->sr_entry->e_name.bv_val, op->o_conn,
1753                         &ename, &result );
1754         ber_str2bv(ename, strlen(ename), 0, &rs->sr_entry->e_name);
1755         /* FIXME: should we normalize this? */
1756         ber_dupbv(&rs->sr_entry->e_nname, &rs->sr_entry->e_name);
1757
1758         op->o_callback = NULL;
1759
1760         send_search_entry( op, rs );
1761
1762         rs->sr_entry->e_name = dn;
1763         rs->sr_entry->e_nname = ndn;
1764
1765         op->o_callback = cb;
1766
1767         return 0;
1768 }
1769 #endif