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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 2003-2009 The OpenLDAP Foundation.
   5  * Portions Copyright 2003 IBM Corporation.
   6  * Portions Copyright 2003-2009 Symas Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Apurva Kumar for inclusion
  19  * in OpenLDAP Software and subsequently rewritten by Howard Chu.
  20  */
  21
  22 #include "portable.h"
  23
  24 #ifdef SLAPD_OVER_PROXYCACHE
  25
  26 #include <stdio.h>
  27
  28 #include <ac/string.h>
  29 #include <ac/time.h>
  30
  31 #include "slap.h"
  32 #include "lutil.h"
  33 #include "ldap_rq.h"
  34 #include "avl.h"
  35
  36 #include "../back-monitor/back-monitor.h"
  37
  38 #include "config.h"
  39
  40 #ifdef LDAP_DEVEL
  41 /*
  42  * Control that allows to access the private DB
  43  * instead of the public one
  44  */
  45 #define PCACHE_CONTROL_PRIVDB           "1.3.6.1.4.1.4203.666.11.9.5.1"
  46
  47 /*
  48  * Extended Operation that allows to remove a query from the cache
  49  */
  50 #define PCACHE_EXOP_QUERY_DELETE        "1.3.6.1.4.1.4203.666.11.9.6.1"
  51
  52 /*
  53  * Monitoring
  54  */
  55 #define PCACHE_MONITOR
  56 #endif
  57
  58 /* query cache structs */
  59 /* query */
  60
  61 typedef struct Query_s {
  62         Filter*         filter;         /* Search Filter */
  63         struct berval   base;           /* Search Base */
  64         int             scope;          /* Search scope */
  65 } Query;
  66
  67 struct query_template_s;
  68
  69 typedef struct Qbase_s {
  70         Avlnode *scopes[4];             /* threaded AVL trees of cached queries */
  71         struct berval base;
  72         int queries;
  73 } Qbase;
  74
  75 /* struct representing a cached query */
  76 typedef struct cached_query_s {
  77         Filter                                  *filter;
  78         Filter                                  *first;
  79         Qbase                                   *qbase;
  80         int                                             scope;
  81         struct berval                   q_uuid;         /* query identifier */
  82         int                                             q_sizelimit;
  83         struct query_template_s         *qtemp; /* template of the query */
  84         time_t                                          expiry_time;    /* time till the query is considered invalid */
  85         time_t                                          refresh_time;   /* time till the query is refreshed */
  86         time_t                                          bindref_time;   /* time till the bind is refreshed */
  87         unsigned long                   answerable_cnt; /* how many times it was answerable */
  88         int                                             refcnt; /* references since last refresh */
  89         ldap_pvt_thread_mutex_t         answerable_cnt_mutex;
  90         struct cached_query_s           *next;          /* next query in the template */
  91         struct cached_query_s           *prev;          /* previous query in the template */
  92         struct cached_query_s           *lru_up;        /* previous query in the LRU list */
  93         struct cached_query_s           *lru_down;      /* next query in the LRU list */
  94         ldap_pvt_thread_rdwr_t          rwlock;
  95 } CachedQuery;
  96
  97 /*
  98  * URL representation:
  99  *
 100  * ldap:///<base>??<scope>?<filter>?x-uuid=<uid>,x-template=<template>,x-attrset=<attrset>,x-expiry=<expiry>,x-refresh=<refresh>
 101  *
 102  * <base> ::= CachedQuery.qbase->base
 103  * <scope> ::= CachedQuery.scope
 104  * <filter> ::= filter2bv(CachedQuery.filter)
 105  * <uuid> ::= CachedQuery.q_uuid
 106  * <attrset> ::= CachedQuery.qtemp->attr_set_index
 107  * <expiry> ::= CachedQuery.expiry_time
 108  * <refresh> ::= CachedQuery.refresh_time
 109  *
 110  * quick hack: parse URI, call add_query() and then fix
 111  * CachedQuery.expiry_time and CachedQuery.q_uuid
 112  *
 113  * NOTE: if the <attrset> changes, all stored URLs will be invalidated.
 114  */
 115
 116 /*
 117  * Represents a set of projected attributes.
 118  */
 119
 120 struct attr_set {
 121         struct query_template_s *templates;
 122         AttributeName*  attrs;          /* specifies the set */
 123         unsigned        flags;
 124 #define PC_CONFIGURED   (0x1)
 125 #define PC_REFERENCED   (0x2)
 126 #define PC_GOT_OC               (0x4)
 127         int             count;          /* number of attributes */
 128 };
 129
 130 /* struct representing a query template
 131  * e.g. template string = &(cn=)(mail=)
 132  */
 133 typedef struct query_template_s {
 134         struct query_template_s *qtnext;
 135         struct query_template_s *qmnext;
 136
 137         Avlnode*                qbase;
 138         CachedQuery*    query;          /* most recent query cached for the template */
 139         CachedQuery*    query_last;     /* oldest query cached for the template */
 140         ldap_pvt_thread_rdwr_t t_rwlock; /* Rd/wr lock for accessing queries in the template */
 141         struct berval   querystr;       /* Filter string corresponding to the QT */
 142         struct berval   bindbase;       /* base DN for Bind request */
 143         struct berval   bindfilterstr;  /* Filter string for Bind request */
 144         struct berval   bindftemp;      /* bind filter template */
 145         Filter          *bindfilter;
 146         AttributeDescription **bindfattrs;      /* attrs to substitute in ftemp */
 147
 148         int                     bindnattrs;             /* number of bindfattrs */
 149         int                     bindscope;
 150         int             attr_set_index; /* determines the projected attributes */
 151         int             no_of_queries;  /* Total number of queries in the template */
 152         time_t          ttl;            /* TTL for the queries of this template */
 153         time_t          negttl;         /* TTL for negative results */
 154         time_t          limitttl;       /* TTL for sizelimit exceeding results */
 155         time_t          ttr;    /* time to refresh */
 156         time_t          bindttr;        /* TTR for cached binds */
 157         struct attr_set t_attrs;        /* filter attrs + attr_set */
 158 } QueryTemplate;
 159
 160 typedef enum {
 161         PC_IGNORE = 0,
 162         PC_POSITIVE,
 163         PC_NEGATIVE,
 164         PC_SIZELIMIT
 165 } pc_caching_reason_t;
 166
 167 static const char *pc_caching_reason_str[] = {
 168         "IGNORE",
 169         "POSITIVE",
 170         "NEGATIVE",
 171         "SIZELIMIT",
 172
 173         NULL
 174 };
 175
 176 struct query_manager_s;
 177
 178 /* prototypes for functions for 1) query containment
 179  * 2) query addition, 3) cache replacement
 180  */
 181 typedef CachedQuery *(QCfunc)(Operation *op, struct query_manager_s*,
 182         Query*, QueryTemplate*);
 183 typedef CachedQuery *(AddQueryfunc)(Operation *op, struct query_manager_s*,
 184         Query*, QueryTemplate*, pc_caching_reason_t, int wlock);
 185 typedef void (CRfunc)(struct query_manager_s*, struct berval*);
 186
 187 /* LDAP query cache */
 188 typedef struct query_manager_s {
 189         struct attr_set*        attr_sets;              /* possible sets of projected attributes */
 190         QueryTemplate*          templates;              /* cacheable templates */
 191
 192         CachedQuery*            lru_top;                /* top and bottom of LRU list */
 193         CachedQuery*            lru_bottom;
 194
 195         ldap_pvt_thread_mutex_t         lru_mutex;      /* mutex for accessing LRU list */
 196
 197         /* Query cache methods */
 198         QCfunc                  *qcfunc;                        /* Query containment*/
 199         CRfunc                  *crfunc;                        /* cache replacement */
 200         AddQueryfunc    *addfunc;                       /* add query */
 201 } query_manager;
 202
 203 /* LDAP query cache manager */
 204 typedef struct cache_manager_s {
 205         BackendDB       db;     /* underlying database */
 206         unsigned long   num_cached_queries;             /* total number of cached queries */
 207         unsigned long   max_queries;                    /* upper bound on # of cached queries */
 208         int             save_queries;                   /* save cached queries across restarts */
 209         int     check_cacheability;             /* check whether a query is cacheable */
 210         int     numattrsets;                    /* number of attribute sets */
 211         int     cur_entries;                    /* current number of entries cached */
 212         int     max_entries;                    /* max number of entries cached */
 213         int     num_entries_limit;              /* max # of entries in a cacheable query */
 214
 215         char    response_cb;                    /* install the response callback
 216                                                  * at the tail of the callback list */
 217 #define PCACHE_RESPONSE_CB_HEAD 0
 218 #define PCACHE_RESPONSE_CB_TAIL 1
 219         char    defer_db_open;                  /* defer open for online add */
 220         char    cache_binds;                    /* cache binds or just passthru */
 221
 222         time_t  cc_period;              /* interval between successive consistency checks (sec) */
 223 #define PCACHE_CC_PAUSED        1
 224 #define PCACHE_CC_OFFLINE       2
 225         int     cc_paused;
 226         void    *cc_arg;
 227
 228         ldap_pvt_thread_mutex_t         cache_mutex;
 229
 230         query_manager*   qm;    /* query cache managed by the cache manager */
 231
 232 #ifdef PCACHE_MONITOR
 233         void            *monitor_cb;
 234         struct berval   monitor_ndn;
 235 #endif /* PCACHE_MONITOR */
 236 } cache_manager;
 237
 238 #ifdef PCACHE_MONITOR
 239 static int pcache_monitor_db_init( BackendDB *be );
 240 static int pcache_monitor_db_open( BackendDB *be );
 241 static int pcache_monitor_db_close( BackendDB *be );
 242 static int pcache_monitor_db_destroy( BackendDB *be );
 243 #endif /* PCACHE_MONITOR */
 244
 245 static int pcache_debug;
 246
 247 #ifdef PCACHE_CONTROL_PRIVDB
 248 static int privDB_cid;
 249 #endif /* PCACHE_CONTROL_PRIVDB */
 250
 251 static AttributeDescription     *ad_queryId, *ad_cachedQueryURL;
 252
 253 #ifdef PCACHE_MONITOR
 254 static AttributeDescription     *ad_numQueries, *ad_numEntries;
 255 static ObjectClass              *oc_olmPCache;
 256 #endif /* PCACHE_MONITOR */
 257
 258 static struct {
 259         char                    *name;
 260         char                    *oid;
 261 }               s_oid[] = {
 262         { "PCacheOID",                  "1.3.6.1.4.1.4203.666.11.9.1" },
 263         { "PCacheAttributes",           "PCacheOID:1" },
 264         { "PCacheObjectClasses",        "PCacheOID:2" },
 265
 266         { NULL }
 267 };
 268
 269 static struct {
 270         char    *desc;
 271         AttributeDescription **adp;
 272 } s_ad[] = {
 273         { "( PCacheAttributes:1 "
 274                 "NAME 'pcacheQueryID' "
 275                 "DESC 'ID of query the entry belongs to, formatted as a UUID' "
 276                 "EQUALITY octetStringMatch "
 277                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.40{64} "
 278                 "NO-USER-MODIFICATION "
 279                 "USAGE directoryOperation )",
 280                 &ad_queryId },
 281         { "( PCacheAttributes:2 "
 282                 "NAME 'pcacheQueryURL' "
 283                 "DESC 'URI describing a cached query' "
 284                 "EQUALITY caseExactMatch "
 285                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 "
 286                 "NO-USER-MODIFICATION "
 287                 "USAGE directoryOperation )",
 288                 &ad_cachedQueryURL },
 289 #ifdef PCACHE_MONITOR
 290         { "( PCacheAttributes:3 "
 291                 "NAME 'pcacheNumQueries' "
 292                 "DESC 'Number of cached queries' "
 293                 "EQUALITY integerMatch "
 294                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
 295                 "NO-USER-MODIFICATION "
 296                 "USAGE directoryOperation )",
 297                 &ad_numQueries },
 298         { "( PCacheAttributes:4 "
 299                 "NAME 'pcacheNumEntries' "
 300                 "DESC 'Number of cached entries' "
 301                 "EQUALITY integerMatch "
 302                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
 303                 "NO-USER-MODIFICATION "
 304                 "USAGE directoryOperation )",
 305                 &ad_numEntries },
 306 #endif /* PCACHE_MONITOR */
 307
 308         { NULL }
 309 };
 310
 311 static struct {
 312         char            *desc;
 313         ObjectClass     **ocp;
 314 }               s_oc[] = {
 315 #ifdef PCACHE_MONITOR
 316         /* augments an existing object, so it must be AUXILIARY */
 317         { "( PCacheObjectClasses:1 "
 318                 "NAME ( 'olmPCache' ) "
 319                 "SUP top AUXILIARY "
 320                 "MAY ( "
 321                         "pcacheQueryURL "
 322                         "$ pcacheNumQueries "
 323                         "$ pcacheNumEntries "
 324                         " ) )",
 325                 &oc_olmPCache },
 326 #endif /* PCACHE_MONITOR */
 327
 328         { NULL }
 329 };
 330
 331 static int
 332 filter2template(
 333         Operation               *op,
 334         Filter                  *f,
 335         struct                  berval *fstr );
 336
 337 static CachedQuery *
 338 add_query(
 339         Operation *op,
 340         query_manager* qm,
 341         Query* query,
 342         QueryTemplate *templ,
 343         pc_caching_reason_t why,
 344         int wlock);
 345
 346 static int
 347 remove_query_data(
 348         Operation       *op,
 349         SlapReply       *rs,
 350         struct berval   *query_uuid );
 351
 352 /*
 353  * Turn a cached query into its URL representation
 354  */
 355 static int
 356 query2url( Operation *op, CachedQuery *q, struct berval *urlbv, int dolock )
 357 {
 358         struct berval   bv_scope,
 359                         bv_filter;
 360         char            attrset_buf[ LDAP_PVT_INTTYPE_CHARS( unsigned long ) ],
 361                         expiry_buf[ LDAP_PVT_INTTYPE_CHARS( unsigned long ) ],
 362                         refresh_buf[ LDAP_PVT_INTTYPE_CHARS( unsigned long ) ],
 363                         answerable_buf[ LDAP_PVT_INTTYPE_CHARS( unsigned long ) ],
 364                         *ptr;
 365         ber_len_t       attrset_len,
 366                         expiry_len,
 367                         refresh_len,
 368                         answerable_len;
 369
 370         if ( dolock ) {
 371                 ldap_pvt_thread_rdwr_rlock( &q->rwlock );
 372         }
 373
 374         ldap_pvt_scope2bv( q->scope, &bv_scope );
 375         filter2bv_x( op, q->filter, &bv_filter );
 376         attrset_len = sprintf( attrset_buf,
 377                 "%lu", (unsigned long)q->qtemp->attr_set_index );
 378         expiry_len = sprintf( expiry_buf,
 379                 "%lu", (unsigned long)q->expiry_time );
 380         answerable_len = snprintf( answerable_buf, sizeof( answerable_buf ),
 381                 "%lu", q->answerable_cnt );
 382         if ( q->refresh_time )
 383                 refresh_len = sprintf( refresh_buf,
 384                         "%lu", (unsigned long)q->refresh_time );
 385         else
 386                 refresh_len = 0;
 387
 388         urlbv->bv_len = STRLENOF( "ldap:///" )
 389                 + q->qbase->base.bv_len
 390                 + STRLENOF( "??" )
 391                 + bv_scope.bv_len
 392                 + STRLENOF( "?" )
 393                 + bv_filter.bv_len
 394                 + STRLENOF( "?x-uuid=" )
 395                 + q->q_uuid.bv_len
 396                 + STRLENOF( ",x-attrset=" )
 397                 + attrset_len
 398                 + STRLENOF( ",x-expiry=" )
 399                 + expiry_len
 400                 + STRLENOF( ",x-answerable=" )
 401                 + answerable_len;
 402         if ( refresh_len )
 403                 urlbv->bv_len += STRLENOF( ",x-refresh=" )
 404                 + refresh_len;
 405
 406         ptr = urlbv->bv_val = ber_memalloc_x( urlbv->bv_len + 1, op->o_tmpmemctx );
 407         ptr = lutil_strcopy( ptr, "ldap:///" );
 408         ptr = lutil_strcopy( ptr, q->qbase->base.bv_val );
 409         ptr = lutil_strcopy( ptr, "??" );
 410         ptr = lutil_strcopy( ptr, bv_scope.bv_val );
 411         ptr = lutil_strcopy( ptr, "?" );
 412         ptr = lutil_strcopy( ptr, bv_filter.bv_val );
 413         ptr = lutil_strcopy( ptr, "?x-uuid=" );
 414         ptr = lutil_strcopy( ptr, q->q_uuid.bv_val );
 415         ptr = lutil_strcopy( ptr, ",x-attrset=" );
 416         ptr = lutil_strcopy( ptr, attrset_buf );
 417         ptr = lutil_strcopy( ptr, ",x-expiry=" );
 418         ptr = lutil_strcopy( ptr, expiry_buf );
 419         ptr = lutil_strcopy( ptr, ",x-answerable=" );
 420         ptr = lutil_strcopy( ptr, answerable_buf );
 421         if ( refresh_len ) {
 422                 ptr = lutil_strcopy( ptr, ",x-refresh=" );
 423                 ptr = lutil_strcopy( ptr, refresh_buf );
 424         }
 425
 426         ber_memfree_x( bv_filter.bv_val, op->o_tmpmemctx );
 427
 428         if ( dolock ) {
 429                 ldap_pvt_thread_rdwr_runlock( &q->rwlock );
 430         }
 431
 432         return 0;
 433 }
 434
 435 /* Find and record the empty filter clauses */
 436
 437 static int
 438 ftemp_attrs( struct berval *ftemp, struct berval *template,
 439         AttributeDescription ***ret, const char **text )
 440 {
 441         int i;
 442         int attr_cnt=0;
 443         struct berval bv;
 444         char *p1, *p2, *t1;
 445         AttributeDescription *ad;
 446         AttributeDescription **descs = NULL;
 447         char *temp2;
 448
 449         temp2 = ch_malloc( ftemp->bv_len );
 450         p1 = ftemp->bv_val;
 451         t1 = temp2;
 452
 453         *ret = NULL;
 454
 455         for (;;) {
 456                 while ( *p1 == '(' || *p1 == '&' || *p1 == '|' || *p1 == ')' )
 457                         *t1++ = *p1++;
 458
 459                 p2 = strchr( p1, '=' );
 460                 if ( !p2 )
 461                         break;
 462                 i = p2 - p1;
 463                 AC_MEMCPY( t1, p1, i );
 464                 t1 += i;
 465                 *t1++ = '=';
 466
 467                 if ( p2[-1] == '<' || p2[-1] == '>' ) p2--;
 468                 bv.bv_val = p1;
 469                 bv.bv_len = p2 - p1;
 470                 ad = NULL;
 471                 i = slap_bv2ad( &bv, &ad, text );
 472                 if ( i ) {
 473                         ch_free( descs );
 474                         return -1;
 475                 }
 476                 if ( *p2 == '<' || *p2 == '>' ) p2++;
 477                 if ( p2[1] != ')' ) {
 478                         p2++;
 479                         while ( *p2 != ')' ) p2++;
 480                         p1 = p2;
 481                         continue;
 482                 }
 483
 484                 descs = (AttributeDescription **)ch_realloc(descs,
 485                                 (attr_cnt + 2)*sizeof(AttributeDescription *));
 486
 487                 descs[attr_cnt++] = ad;
 488
 489                 p1 = p2+1;
 490         }
 491         *t1 = '\0';
 492         descs[attr_cnt] = NULL;
 493         *ret = descs;
 494         template->bv_val = temp2;
 495         template->bv_len = t1 - temp2;
 496         return attr_cnt;
 497 }
 498
 499 static int
 500 template_attrs( char *template, struct attr_set *set, AttributeName **ret,
 501         const char **text )
 502 {
 503         int got_oc = 0;
 504         int alluser = 0;
 505         int allop = 0;
 506         int i;
 507         int attr_cnt;
 508         int t_cnt = 0;
 509         struct berval bv;
 510         char *p1, *p2;
 511         AttributeDescription *ad;
 512         AttributeName *attrs;
 513
 514         p1 = template;
 515
 516         *ret = NULL;
 517
 518         attrs = ch_calloc( set->count + 1, sizeof(AttributeName) );
 519         for ( i=0; i < set->count; i++ )
 520                 attrs[i] = set->attrs[i];
 521         attr_cnt = i;
 522         alluser = an_find( attrs, slap_bv_all_user_attrs );
 523         allop = an_find( attrs, slap_bv_all_operational_attrs );
 524
 525         for (;;) {
 526                 while ( *p1 == '(' || *p1 == '&' || *p1 == '|' || *p1 == ')' ) p1++;
 527                 p2 = strchr( p1, '=' );
 528                 if ( !p2 )
 529                         break;
 530                 if ( p2[-1] == '<' || p2[-1] == '>' ) p2--;
 531                 bv.bv_val = p1;
 532                 bv.bv_len = p2 - p1;
 533                 ad = NULL;
 534                 i = slap_bv2ad( &bv, &ad, text );
 535                 if ( i ) {
 536                         ch_free( attrs );
 537                         return -1;
 538                 }
 539                 t_cnt++;
 540
 541                 if ( ad == slap_schema.si_ad_objectClass )
 542                         got_oc = 1;
 543
 544                 if ( is_at_operational(ad->ad_type)) {
 545                         if ( allop ) {
 546                                 goto bottom;
 547                         }
 548                 } else if ( alluser ) {
 549                         goto bottom;
 550                 }
 551                 if ( !ad_inlist( ad, attrs )) {
 552                         attrs = (AttributeName *)ch_realloc(attrs,
 553                                         (attr_cnt + 2)*sizeof(AttributeName));
 554
 555                         attrs[attr_cnt].an_desc = ad;
 556                         attrs[attr_cnt].an_name = ad->ad_cname;
 557                         attrs[attr_cnt].an_oc = NULL;
 558                         attrs[attr_cnt].an_flags = 0;
 559                         BER_BVZERO( &attrs[attr_cnt+1].an_name );
 560                         attr_cnt++;
 561                 }
 562
 563 bottom:
 564                 p1 = p2+2;
 565         }
 566         if ( !t_cnt ) {
 567                 *text = "couldn't parse template";
 568                 return -1;
 569         }
 570         if ( !got_oc && !( set->flags & PC_GOT_OC )) {
 571                 attrs = (AttributeName *)ch_realloc(attrs,
 572                                 (attr_cnt + 2)*sizeof(AttributeName));
 573
 574                 ad = slap_schema.si_ad_objectClass;
 575                 attrs[attr_cnt].an_desc = ad;
 576                 attrs[attr_cnt].an_name = ad->ad_cname;
 577                 attrs[attr_cnt].an_oc = NULL;
 578                 attrs[attr_cnt].an_flags = 0;
 579                 BER_BVZERO( &attrs[attr_cnt+1].an_name );
 580                 attr_cnt++;
 581         }
 582         *ret = attrs;
 583         return attr_cnt;
 584 }
 585
 586 /*
 587  * Turn an URL representing a formerly cached query into a cached query,
 588  * and try to cache it
 589  */
 590 static int
 591 url2query(
 592         char            *url,
 593         Operation       *op,
 594         query_manager   *qm )
 595 {
 596         Query           query = { 0 };
 597         QueryTemplate   *qt;
 598         CachedQuery     *cq;
 599         LDAPURLDesc     *lud = NULL;
 600         struct berval   base,
 601                         tempstr = BER_BVNULL,
 602                         uuid;
 603         int             attrset;
 604         time_t          expiry_time;
 605         time_t          refresh_time;
 606         unsigned long   answerable_cnt;
 607         int             i,
 608                         got = 0,
 609 #define GOT_UUID        0x1U
 610 #define GOT_ATTRSET     0x2U
 611 #define GOT_EXPIRY      0x4U
 612 #define GOT_ANSWERABLE  0x8U
 613 #define GOT_REFRESH     0x10U
 614 #define GOT_ALL         (GOT_UUID|GOT_ATTRSET|GOT_EXPIRY|GOT_ANSWERABLE)
 615                         rc = 0;
 616
 617         rc = ldap_url_parse( url, &lud );
 618         if ( rc != LDAP_URL_SUCCESS ) {
 619                 return -1;
 620         }
 621
 622         /* non-allowed fields */
 623         if ( lud->lud_host != NULL ) {
 624                 rc = 1;
 625                 goto error;
 626         }
 627
 628         if ( lud->lud_attrs != NULL ) {
 629                 rc = 1;
 630                 goto error;
 631         }
 632
 633         /* be pedantic */
 634         if ( strcmp( lud->lud_scheme, "ldap" ) != 0 ) {
 635                 rc = 1;
 636                 goto error;
 637         }
 638
 639         /* required fields */
 640         if ( lud->lud_dn == NULL || lud->lud_dn[ 0 ] == '\0' ) {
 641                 rc = 1;
 642                 goto error;
 643         }
 644
 645         switch ( lud->lud_scope ) {
 646         case LDAP_SCOPE_BASE:
 647         case LDAP_SCOPE_ONELEVEL:
 648         case LDAP_SCOPE_SUBTREE:
 649         case LDAP_SCOPE_SUBORDINATE:
 650                 break;
 651
 652         default:
 653                 rc = 1;
 654                 goto error;
 655         }
 656
 657         if ( lud->lud_filter == NULL || lud->lud_filter[ 0 ] == '\0' ) {
 658                 rc = 1;
 659                 goto error;
 660         }
 661
 662         if ( lud->lud_exts == NULL ) {
 663                 rc = 1;
 664                 goto error;
 665         }
 666
 667         for ( i = 0; lud->lud_exts[ i ] != NULL; i++ ) {
 668                 if ( strncmp( lud->lud_exts[ i ], "x-uuid=", STRLENOF( "x-uuid=" ) ) == 0 ) {
 669                         struct berval   tmpUUID;
 670                         Syntax          *syn_UUID = slap_schema.si_ad_entryUUID->ad_type->sat_syntax;
 671
 672                         if ( got & GOT_UUID ) {
 673                                 rc = 1;
 674                                 goto error;
 675                         }
 676
 677                         ber_str2bv( &lud->lud_exts[ i ][ STRLENOF( "x-uuid=" ) ], 0, 0, &tmpUUID );
 678                         rc = syn_UUID->ssyn_pretty( syn_UUID, &tmpUUID, &uuid, NULL );
 679                         if ( rc != LDAP_SUCCESS ) {
 680                                 goto error;
 681                         }
 682                         got |= GOT_UUID;
 683
 684                 } else if ( strncmp( lud->lud_exts[ i ], "x-attrset=", STRLENOF( "x-attrset=" ) ) == 0 ) {
 685                         if ( got & GOT_ATTRSET ) {
 686                                 rc = 1;
 687                                 goto error;
 688                         }
 689
 690                         rc = lutil_atoi( &attrset, &lud->lud_exts[ i ][ STRLENOF( "x-attrset=" ) ] );
 691                         if ( rc ) {
 692                                 goto error;
 693                         }
 694                         got |= GOT_ATTRSET;
 695
 696                 } else if ( strncmp( lud->lud_exts[ i ], "x-expiry=", STRLENOF( "x-expiry=" ) ) == 0 ) {
 697                         unsigned long l;
 698
 699                         if ( got & GOT_EXPIRY ) {
 700                                 rc = 1;
 701                                 goto error;
 702                         }
 703
 704                         rc = lutil_atoul( &l, &lud->lud_exts[ i ][ STRLENOF( "x-expiry=" ) ] );
 705                         if ( rc ) {
 706                                 goto error;
 707                         }
 708                         expiry_time = (time_t)l;
 709                         got |= GOT_EXPIRY;
 710
 711                 } else if ( strncmp( lud->lud_exts[ i ], "x-answerable=", STRLENOF( "x-answerable=" ) ) == 0 ) {
 712                         if ( got & GOT_ANSWERABLE ) {
 713                                 rc = 1;
 714                                 goto error;
 715                         }
 716
 717                         rc = lutil_atoul( &answerable_cnt, &lud->lud_exts[ i ][ STRLENOF( "x-answerable=" ) ] );
 718                         if ( rc ) {
 719                                 goto error;
 720                         }
 721                         got |= GOT_ANSWERABLE;
 722
 723                 } else if ( strncmp( lud->lud_exts[ i ], "x-refresh=", STRLENOF( "x-refresh=" ) ) == 0 ) {
 724                         unsigned long l;
 725
 726                         if ( got & GOT_REFRESH ) {
 727                                 rc = 1;
 728                                 goto error;
 729                         }
 730
 731                         rc = lutil_atoul( &l, &lud->lud_exts[ i ][ STRLENOF( "x-refresh=" ) ] );
 732                         if ( rc ) {
 733                                 goto error;
 734                         }
 735                         refresh_time = (time_t)l;
 736                         got |= GOT_REFRESH;
 737
 738                 } else {
 739                         rc = -1;
 740                         goto error;
 741                 }
 742         }
 743
 744         if ( got != GOT_ALL ) {
 745                 rc = 1;
 746                 goto error;
 747         }
 748
 749         if ( !(got & GOT_REFRESH ))
 750                 refresh_time = 0;
 751
 752         /* ignore expired queries */
 753         if ( expiry_time <= slap_get_time()) {
 754                 Operation       op2 = *op;
 755                 SlapReply       rs2 = { 0 };
 756
 757                 memset( &op2.oq_search, 0, sizeof( op2.oq_search ) );
 758
 759                 (void)remove_query_data( &op2, &rs2, &uuid );
 760
 761                 rc = 0;
 762
 763         } else {
 764                 ber_str2bv( lud->lud_dn, 0, 0, &base );
 765                 rc = dnNormalize( 0, NULL, NULL, &base, &query.base, NULL );
 766                 if ( rc != LDAP_SUCCESS ) {
 767                         goto error;
 768                 }
 769                 query.scope = lud->lud_scope;
 770                 query.filter = str2filter( lud->lud_filter );
 771                 if ( query.filter == NULL ) {
 772                         rc = -1;
 773                         goto error;
 774                 }
 775
 776                 tempstr.bv_val = ch_malloc( strlen( lud->lud_filter ) + 1 );
 777                 tempstr.bv_len = 0;
 778                 if ( filter2template( op, query.filter, &tempstr ) ) {
 779                         ch_free( tempstr.bv_val );
 780                         rc = -1;
 781                         goto error;
 782                 }
 783
 784                 /* check for query containment */
 785                 qt = qm->attr_sets[attrset].templates;
 786                 for ( ; qt; qt = qt->qtnext ) {
 787                         /* find if template i can potentially answer tempstr */
 788                         if ( bvmatch( &qt->querystr, &tempstr ) ) {
 789                                 break;
 790                         }
 791                 }
 792
 793                 if ( qt == NULL ) {
 794                         rc = 1;
 795                         goto error;
 796                 }
 797
 798                 cq = add_query( op, qm, &query, qt, PC_POSITIVE, 0 );
 799                 if ( cq != NULL ) {
 800                         cq->expiry_time = expiry_time;
 801                         cq->refresh_time = refresh_time;
 802                         cq->q_uuid = uuid;
 803                         cq->answerable_cnt = answerable_cnt;
 804                         cq->refcnt = 0;
 805
 806                         /* it's now into cq->filter */
 807                         BER_BVZERO( &uuid );
 808                         query.filter = NULL;
 809
 810                 } else {
 811                         rc = 1;
 812                 }
 813         }
 814
 815 error:;
 816         if ( query.filter != NULL ) filter_free( query.filter );
 817         if ( !BER_BVISNULL( &tempstr ) ) ch_free( tempstr.bv_val );
 818         if ( !BER_BVISNULL( &query.base ) ) ch_free( query.base.bv_val );
 819         if ( !BER_BVISNULL( &uuid ) ) ch_free( uuid.bv_val );
 820         if ( lud != NULL ) ldap_free_urldesc( lud );
 821
 822         return rc;
 823 }
 824
 825 /* Return 1 for an added entry, else 0 */
 826 static int
 827 merge_entry(
 828         Operation               *op,
 829         Entry                   *e,
 830         int                     dup,
 831         struct berval*          query_uuid )
 832 {
 833         int             rc;
 834         Modifications* modlist = NULL;
 835         const char*     text = NULL;
 836         Attribute               *attr;
 837         char                    textbuf[SLAP_TEXT_BUFLEN];
 838         size_t                  textlen = sizeof(textbuf);
 839
 840         SlapReply sreply = {REP_RESULT};
 841
 842         slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
 843
 844         if ( dup )
 845                 e = entry_dup( e );
 846         attr = e->e_attrs;
 847         e->e_attrs = NULL;
 848
 849         /* add queryId attribute */
 850         attr_merge_one( e, ad_queryId, query_uuid, NULL );
 851
 852         /* append the attribute list from the fetched entry */
 853         e->e_attrs->a_next = attr;
 854
 855         op->o_tag = LDAP_REQ_ADD;
 856         op->o_protocol = LDAP_VERSION3;
 857         op->o_callback = &cb;
 858         op->o_time = slap_get_time();
 859         op->o_do_not_cache = 1;
 860
 861         op->ora_e = e;
 862         op->o_req_dn = e->e_name;
 863         op->o_req_ndn = e->e_nname;
 864         rc = op->o_bd->be_add( op, &sreply );
 865
 866         if ( rc != LDAP_SUCCESS ) {
 867                 if ( rc == LDAP_ALREADY_EXISTS ) {
 868                         slap_entry2mods( e, &modlist, &text, textbuf, textlen );
 869                         modlist->sml_op = LDAP_MOD_ADD;
 870                         op->o_tag = LDAP_REQ_MODIFY;
 871                         op->orm_modlist = modlist;
 872                         op->o_managedsait = SLAP_CONTROL_CRITICAL;
 873                         op->o_bd->be_modify( op, &sreply );
 874                         slap_mods_free( modlist, 1 );
 875                 } else if ( rc == LDAP_REFERRAL ||
 876                                         rc == LDAP_NO_SUCH_OBJECT ) {
 877                         syncrepl_add_glue( op, e );
 878                         e = NULL;
 879                         rc = 1;
 880                 }
 881                 if ( e ) {
 882                         entry_free( e );
 883                         rc = 0;
 884                 }
 885         } else {
 886                 if ( op->ora_e == e )
 887                         entry_free( e );
 888                 rc = 1;
 889         }
 890
 891         return rc;
 892 }
 893
 894 /* Length-ordered sort on normalized DNs */
 895 static int pcache_dn_cmp( const void *v1, const void *v2 )
 896 {
 897         const Qbase *q1 = v1, *q2 = v2;
 898
 899         int rc = q1->base.bv_len - q2->base.bv_len;
 900         if ( rc == 0 )
 901                 rc = strncmp( q1->base.bv_val, q2->base.bv_val, q1->base.bv_len );
 902         return rc;
 903 }
 904
 905 static int lex_bvcmp( struct berval *bv1, struct berval *bv2 )
 906 {
 907         int len, dif;
 908         dif = bv1->bv_len - bv2->bv_len;
 909         len = bv1->bv_len;
 910         if ( dif > 0 ) len -= dif;
 911         len = memcmp( bv1->bv_val, bv2->bv_val, len );
 912         if ( !len )
 913                 len = dif;
 914         return len;
 915 }
 916
 917 /* compare the current value in each filter */
 918 static int pcache_filter_cmp( Filter *f1, Filter *f2 )
 919 {
 920         int rc, weight1, weight2;
 921
 922         switch( f1->f_choice ) {
 923         case LDAP_FILTER_PRESENT:
 924                 weight1 = 0;
 925                 break;
 926         case LDAP_FILTER_EQUALITY:
 927         case LDAP_FILTER_GE:
 928         case LDAP_FILTER_LE:
 929                 weight1 = 1;
 930                 break;
 931         default:
 932                 weight1 = 2;
 933         }
 934         switch( f2->f_choice ) {
 935         case LDAP_FILTER_PRESENT:
 936                 weight2 = 0;
 937                 break;
 938         case LDAP_FILTER_EQUALITY:
 939         case LDAP_FILTER_GE:
 940         case LDAP_FILTER_LE:
 941                 weight2 = 1;
 942                 break;
 943         default:
 944                 weight2 = 2;
 945         }
 946         rc = weight1 - weight2;
 947         if ( !rc ) {
 948                 switch( weight1 ) {
 949                 case 0:
 950                         break;
 951                 case 1:
 952                         rc = lex_bvcmp( &f1->f_av_value, &f2->f_av_value );
 953                         break;
 954                 case 2:
 955                         if ( f1->f_choice == LDAP_FILTER_SUBSTRINGS ) {
 956                                 rc = 0;
 957                                 if ( !BER_BVISNULL( &f1->f_sub_initial )) {
 958                                         if ( !BER_BVISNULL( &f2->f_sub_initial )) {
 959                                                 rc = lex_bvcmp( &f1->f_sub_initial,
 960                                                         &f2->f_sub_initial );
 961                                         } else {
 962                                                 rc = 1;
 963                                         }
 964                                 } else if ( !BER_BVISNULL( &f2->f_sub_initial )) {
 965                                         rc = -1;
 966                                 }
 967                                 if ( rc ) break;
 968                                 if ( f1->f_sub_any ) {
 969                                         if ( f2->f_sub_any ) {
 970                                                 rc = lex_bvcmp( f1->f_sub_any,
 971                                                         f2->f_sub_any );
 972                                         } else {
 973                                                 rc = 1;
 974                                         }
 975                                 } else if ( f2->f_sub_any ) {
 976                                         rc = -1;
 977                                 }
 978                                 if ( rc ) break;
 979                                 if ( !BER_BVISNULL( &f1->f_sub_final )) {
 980                                         if ( !BER_BVISNULL( &f2->f_sub_final )) {
 981                                                 rc = lex_bvcmp( &f1->f_sub_final,
 982                                                         &f2->f_sub_final );
 983                                         } else {
 984                                                 rc = 1;
 985                                         }
 986                                 } else if ( !BER_BVISNULL( &f2->f_sub_final )) {
 987                                         rc = -1;
 988                                 }
 989                         } else {
 990                                 rc = lex_bvcmp( &f1->f_mr_value,
 991                                         &f2->f_mr_value );
 992                         }
 993                         break;
 994                 }
 995                 if ( !rc ) {
 996                         f1 = f1->f_next;
 997                         f2 = f2->f_next;
 998                         if ( f1 || f2 ) {
 999                                 if ( !f1 )
1000                                         rc = -1;
1001                                 else if ( !f2 )
1002                                         rc = 1;
1003                                 else {
1004                                         while ( f1->f_choice == LDAP_FILTER_AND || f1->f_choice == LDAP_FILTER_OR )
1005                                                 f1 = f1->f_and;
1006                                         while ( f2->f_choice == LDAP_FILTER_AND || f2->f_choice == LDAP_FILTER_OR )
1007                                                 f2 = f2->f_and;
1008                                         rc = pcache_filter_cmp( f1, f2 );
1009                                 }
1010                         }
1011                 }
1012         }
1013         return rc;
1014 }
1015
1016 /* compare filters in each query */
1017 static int pcache_query_cmp( const void *v1, const void *v2 )
1018 {
1019         const CachedQuery *q1 = v1, *q2 =v2;
1020         return pcache_filter_cmp( q1->first, q2->first );
1021 }
1022
1023 /* add query on top of LRU list */
1024 static void
1025 add_query_on_top (query_manager* qm, CachedQuery* qc)
1026 {
1027         CachedQuery* top = qm->lru_top;
1028
1029         qm->lru_top = qc;
1030
1031         if (top)
1032                 top->lru_up = qc;
1033         else
1034                 qm->lru_bottom = qc;
1035
1036         qc->lru_down = top;
1037         qc->lru_up = NULL;
1038         Debug( pcache_debug, "Base of added query = %s\n",
1039                         qc->qbase->base.bv_val, 0, 0 );
1040 }
1041
1042 /* remove_query from LRU list */
1043
1044 static void
1045 remove_query (query_manager* qm, CachedQuery* qc)
1046 {
1047         CachedQuery* up;
1048         CachedQuery* down;
1049
1050         if (!qc)
1051                 return;
1052
1053         up = qc->lru_up;
1054         down = qc->lru_down;
1055
1056         if (!up)
1057                 qm->lru_top = down;
1058
1059         if (!down)
1060                 qm->lru_bottom = up;
1061
1062         if (down)
1063                 down->lru_up = up;
1064
1065         if (up)
1066                 up->lru_down = down;
1067
1068         qc->lru_up = qc->lru_down = NULL;
1069 }
1070
1071 /* find and remove string2 from string1
1072  * from start if position = 1,
1073  * from end if position = 3,
1074  * from anywhere if position = 2
1075  * string1 is overwritten if position = 2.
1076  */
1077
1078 static int
1079 find_and_remove(struct berval* ber1, struct berval* ber2, int position)
1080 {
1081         int ret=0;
1082
1083         if ( !ber2->bv_val )
1084                 return 1;
1085         if ( !ber1->bv_val )
1086                 return 0;
1087
1088         switch( position ) {
1089         case 1:
1090                 if ( ber1->bv_len >= ber2->bv_len && !memcmp( ber1->bv_val,
1091                         ber2->bv_val, ber2->bv_len )) {
1092                         ret = 1;
1093                         ber1->bv_val += ber2->bv_len;
1094                         ber1->bv_len -= ber2->bv_len;
1095                 }
1096                 break;
1097         case 2: {
1098                 char *temp;
1099                 ber1->bv_val[ber1->bv_len] = '\0';
1100                 temp = strstr( ber1->bv_val, ber2->bv_val );
1101                 if ( temp ) {
1102                         strcpy( temp, temp+ber2->bv_len );
1103                         ber1->bv_len -= ber2->bv_len;
1104                         ret = 1;
1105                 }
1106                 break;
1107                 }
1108         case 3:
1109                 if ( ber1->bv_len >= ber2->bv_len &&
1110                         !memcmp( ber1->bv_val+ber1->bv_len-ber2->bv_len, ber2->bv_val,
1111                                 ber2->bv_len )) {
1112                         ret = 1;
1113                         ber1->bv_len -= ber2->bv_len;
1114                 }
1115                 break;
1116         }
1117         return ret;
1118 }
1119
1120
1121 static struct berval*
1122 merge_init_final(Operation *op, struct berval* init, struct berval* any,
1123         struct berval* final)
1124 {
1125         struct berval* merged, *temp;
1126         int i, any_count, count;
1127
1128         for (any_count=0; any && any[any_count].bv_val; any_count++)
1129                 ;
1130
1131         count = any_count;
1132
1133         if (init->bv_val)
1134                 count++;
1135         if (final->bv_val)
1136                 count++;
1137
1138         merged = (struct berval*)op->o_tmpalloc( (count+1)*sizeof(struct berval),
1139                 op->o_tmpmemctx );
1140         temp = merged;
1141
1142         if (init->bv_val) {
1143                 ber_dupbv_x( temp, init, op->o_tmpmemctx );
1144                 temp++;
1145         }
1146
1147         for (i=0; i<any_count; i++) {
1148                 ber_dupbv_x( temp, any, op->o_tmpmemctx );
1149                 temp++; any++;
1150         }
1151
1152         if (final->bv_val){
1153                 ber_dupbv_x( temp, final, op->o_tmpmemctx );
1154                 temp++;
1155         }
1156         BER_BVZERO( temp );
1157         return merged;
1158 }
1159
1160 /* Each element in stored must be found in incoming. Incoming is overwritten.
1161  */
1162 static int
1163 strings_containment(struct berval* stored, struct berval* incoming)
1164 {
1165         struct berval* element;
1166         int k=0;
1167         int j, rc = 0;
1168
1169         for ( element=stored; element->bv_val != NULL; element++ ) {
1170                 for (j = k; incoming[j].bv_val != NULL; j++) {
1171                         if (find_and_remove(&(incoming[j]), element, 2)) {
1172                                 k = j;
1173                                 rc = 1;
1174                                 break;
1175                         }
1176                         rc = 0;
1177                 }
1178                 if ( rc ) {
1179                         continue;
1180                 } else {
1181                         return 0;
1182                 }
1183         }
1184         return 1;
1185 }
1186
1187 static int
1188 substr_containment_substr(Operation *op, Filter* stored, Filter* incoming)
1189 {
1190         int rc = 0;
1191
1192         struct berval init_incoming;
1193         struct berval final_incoming;
1194         struct berval *remaining_incoming = NULL;
1195
1196         if ((!(incoming->f_sub_initial.bv_val) && (stored->f_sub_initial.bv_val))
1197            || (!(incoming->f_sub_final.bv_val) && (stored->f_sub_final.bv_val)))
1198                 return 0;
1199
1200         init_incoming = incoming->f_sub_initial;
1201         final_incoming =  incoming->f_sub_final;
1202
1203         if (find_and_remove(&init_incoming,
1204                         &(stored->f_sub_initial), 1) && find_and_remove(&final_incoming,
1205                         &(stored->f_sub_final), 3))
1206         {
1207                 if (stored->f_sub_any == NULL) {
1208                         rc = 1;
1209                         goto final;
1210                 }
1211                 remaining_incoming = merge_init_final(op, &init_incoming,
1212                                                 incoming->f_sub_any, &final_incoming);
1213                 rc = strings_containment(stored->f_sub_any, remaining_incoming);
1214                 ber_bvarray_free_x( remaining_incoming, op->o_tmpmemctx );
1215         }
1216 final:
1217         return rc;
1218 }
1219
1220 static int
1221 substr_containment_equality(Operation *op, Filter* stored, Filter* incoming)
1222 {
1223         struct berval incoming_val[2];
1224         int rc = 0;
1225
1226         incoming_val[1] = incoming->f_av_value;
1227
1228         if (find_and_remove(incoming_val+1,
1229                         &(stored->f_sub_initial), 1) && find_and_remove(incoming_val+1,
1230                         &(stored->f_sub_final), 3)) {
1231                 if (stored->f_sub_any == NULL){
1232                         rc = 1;
1233                         goto final;
1234                 }
1235                 ber_dupbv_x( incoming_val, incoming_val+1, op->o_tmpmemctx );
1236                 BER_BVZERO( incoming_val+1 );
1237                 rc = strings_containment(stored->f_sub_any, incoming_val);
1238                 op->o_tmpfree( incoming_val[0].bv_val, op->o_tmpmemctx );
1239         }
1240 final:
1241         return rc;
1242 }
1243
1244 static Filter *
1245 filter_first( Filter *f )
1246 {
1247         while ( f->f_choice == LDAP_FILTER_OR || f->f_choice == LDAP_FILTER_AND )
1248                 f = f->f_and;
1249         return f;
1250 }
1251
1252
1253 static CachedQuery *
1254 find_filter( Operation *op, Avlnode *root, Filter *inputf, Filter *first )
1255 {
1256         Filter* fs;
1257         Filter* fi;
1258         MatchingRule* mrule = NULL;
1259         int res=0, eqpass= 0;
1260         int ret, rc, dir;
1261         Avlnode *ptr;
1262         CachedQuery cq, *qc;
1263
1264         cq.filter = inputf;
1265         cq.first = first;
1266
1267         /* substring matches sort to the end, and we just have to
1268          * walk the entire list.
1269          */
1270         if ( first->f_choice == LDAP_FILTER_SUBSTRINGS ) {
1271                 ptr = tavl_end( root, 1 );
1272                 dir = TAVL_DIR_LEFT;
1273         } else {
1274                 ptr = tavl_find3( root, &cq, pcache_query_cmp, &ret );
1275                 dir = (first->f_choice == LDAP_FILTER_GE) ? TAVL_DIR_LEFT :
1276                         TAVL_DIR_RIGHT;
1277         }
1278
1279         while (ptr) {
1280                 qc = ptr->avl_data;
1281                 fi = inputf;
1282                 fs = qc->filter;
1283
1284                 /* an incoming substr query can only be satisfied by a cached
1285                  * substr query.
1286                  */
1287                 if ( first->f_choice == LDAP_FILTER_SUBSTRINGS &&
1288                         qc->first->f_choice != LDAP_FILTER_SUBSTRINGS )
1289                         break;
1290
1291                 /* an incoming eq query can be satisfied by a cached eq or substr
1292                  * query
1293                  */
1294                 if ( first->f_choice == LDAP_FILTER_EQUALITY ) {
1295                         if ( eqpass == 0 ) {
1296                                 if ( qc->first->f_choice != LDAP_FILTER_EQUALITY ) {
1297 nextpass:                       eqpass = 1;
1298                                         ptr = tavl_end( root, 1 );
1299                                         dir = TAVL_DIR_LEFT;
1300                                         continue;
1301                                 }
1302                         } else {
1303                                 if ( qc->first->f_choice != LDAP_FILTER_SUBSTRINGS )
1304                                         break;
1305                         }
1306                 }
1307                 do {
1308                         res=0;
1309                         switch (fs->f_choice) {
1310                         case LDAP_FILTER_EQUALITY:
1311                                 if (fi->f_choice == LDAP_FILTER_EQUALITY)
1312                                         mrule = fs->f_ava->aa_desc->ad_type->sat_equality;
1313                                 else
1314                                         ret = 1;
1315                                 break;
1316                         case LDAP_FILTER_GE:
1317                         case LDAP_FILTER_LE:
1318                                 mrule = fs->f_ava->aa_desc->ad_type->sat_ordering;
1319                                 break;
1320                         default:
1321                                 mrule = NULL;
1322                         }
1323                         if (mrule) {
1324                                 const char *text;
1325                                 rc = value_match(&ret, fs->f_ava->aa_desc, mrule,
1326                                         SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
1327                                         &(fi->f_ava->aa_value),
1328                                         &(fs->f_ava->aa_value), &text);
1329                                 if (rc != LDAP_SUCCESS) {
1330                                         return NULL;
1331                                 }
1332                                 if ( fi==first && fi->f_choice==LDAP_FILTER_EQUALITY && ret )
1333                                         goto nextpass;
1334                         }
1335                         switch (fs->f_choice) {
1336                         case LDAP_FILTER_OR:
1337                         case LDAP_FILTER_AND:
1338                                 fs = fs->f_and;
1339                                 fi = fi->f_and;
1340                                 res=1;
1341                                 break;
1342                         case LDAP_FILTER_SUBSTRINGS:
1343                                 /* check if the equality query can be
1344                                 * answered with cached substring query */
1345                                 if ((fi->f_choice == LDAP_FILTER_EQUALITY)
1346                                         && substr_containment_equality( op,
1347                                         fs, fi))
1348                                         res=1;
1349                                 /* check if the substring query can be
1350                                 * answered with cached substring query */
1351                                 if ((fi->f_choice ==LDAP_FILTER_SUBSTRINGS
1352                                         ) && substr_containment_substr( op,
1353                                         fs, fi))
1354                                         res= 1;
1355                                 fs=fs->f_next;
1356                                 fi=fi->f_next;
1357                                 break;
1358                         case LDAP_FILTER_PRESENT:
1359                                 res=1;
1360                                 fs=fs->f_next;
1361                                 fi=fi->f_next;
1362                                 break;
1363                         case LDAP_FILTER_EQUALITY:
1364                                 if (ret == 0)
1365                                         res = 1;
1366                                 fs=fs->f_next;
1367                                 fi=fi->f_next;
1368                                 break;
1369                         case LDAP_FILTER_GE:
1370                                 if (mrule && ret >= 0)
1371                                         res = 1;
1372                                 fs=fs->f_next;
1373                                 fi=fi->f_next;
1374                                 break;
1375                         case LDAP_FILTER_LE:
1376                                 if (mrule && ret <= 0)
1377                                         res = 1;
1378                                 fs=fs->f_next;
1379                                 fi=fi->f_next;
1380                                 break;
1381                         case LDAP_FILTER_NOT:
1382                                 res=0;
1383                                 break;
1384                         default:
1385                                 break;
1386                         }
1387                 } while((res) && (fi != NULL) && (fs != NULL));
1388
1389                 if ( res )
1390                         return qc;
1391                 ptr = tavl_next( ptr, dir );
1392         }
1393         return NULL;
1394 }
1395
1396 /* check whether query is contained in any of
1397  * the cached queries in template
1398  */
1399 static CachedQuery *
1400 query_containment(Operation *op, query_manager *qm,
1401                   Query *query,
1402                   QueryTemplate *templa)
1403 {
1404         CachedQuery* qc;
1405         int depth = 0, tscope;
1406         Qbase qbase, *qbptr = NULL;
1407         struct berval pdn;
1408
1409         if (query->filter != NULL) {
1410                 Filter *first;
1411
1412                 Debug( pcache_debug, "Lock QC index = %p\n",
1413                                 (void *) templa, 0, 0 );
1414                 qbase.base = query->base;
1415
1416                 first = filter_first( query->filter );
1417
1418                 ldap_pvt_thread_rdwr_rlock(&templa->t_rwlock);
1419                 for( ;; ) {
1420                         /* Find the base */
1421                         qbptr = avl_find( templa->qbase, &qbase, pcache_dn_cmp );
1422                         if ( qbptr ) {
1423                                 tscope = query->scope;
1424                                 /* Find a matching scope:
1425                                  * match at depth 0 OK
1426                                  * scope is BASE,
1427                                  *      one at depth 1 OK
1428                                  *  subord at depth > 0 OK
1429                                  *      subtree at any depth OK
1430                                  * scope is ONE,
1431                                  *  subtree or subord at any depth OK
1432                                  * scope is SUBORD,
1433                                  *  subtree or subord at any depth OK
1434                                  * scope is SUBTREE,
1435                                  *  subord at depth > 0 OK
1436                                  *  subtree at any depth OK
1437                                  */
1438                                 for ( tscope = 0 ; tscope <= LDAP_SCOPE_CHILDREN; tscope++ ) {
1439                                         switch ( query->scope ) {
1440                                         case LDAP_SCOPE_BASE:
1441                                                 if ( tscope == LDAP_SCOPE_BASE && depth ) continue;
1442                                                 if ( tscope == LDAP_SCOPE_ONE && depth != 1) continue;
1443                                                 if ( tscope == LDAP_SCOPE_CHILDREN && !depth ) continue;
1444                                                 break;
1445                                         case LDAP_SCOPE_ONE:
1446                                                 if ( tscope == LDAP_SCOPE_BASE )
1447                                                         tscope = LDAP_SCOPE_ONE;
1448                                                 if ( tscope == LDAP_SCOPE_ONE && depth ) continue;
1449                                                 if ( !depth ) break;
1450                                                 if ( tscope < LDAP_SCOPE_SUBTREE )
1451                                                         tscope = LDAP_SCOPE_SUBTREE;
1452                                                 break;
1453                                         case LDAP_SCOPE_SUBTREE:
1454                                                 if ( tscope < LDAP_SCOPE_SUBTREE )
1455                                                         tscope = LDAP_SCOPE_SUBTREE;
1456                                                 if ( tscope == LDAP_SCOPE_CHILDREN && !depth ) continue;
1457                                                 break;
1458                                         case LDAP_SCOPE_CHILDREN:
1459                                                 if ( tscope < LDAP_SCOPE_SUBTREE )
1460                                                         tscope = LDAP_SCOPE_SUBTREE;
1461                                                 break;
1462                                         }
1463                                         if ( !qbptr->scopes[tscope] ) continue;
1464
1465                                         /* Find filter */
1466                                         qc = find_filter( op, qbptr->scopes[tscope],
1467                                                         query->filter, first );
1468                                         if ( qc ) {
1469                                                 if ( qc->q_sizelimit ) {
1470                                                         ldap_pvt_thread_rdwr_runlock(&templa->t_rwlock);
1471                                                         return NULL;
1472                                                 }
1473                                                 ldap_pvt_thread_mutex_lock(&qm->lru_mutex);
1474                                                 if (qm->lru_top != qc) {
1475                                                         remove_query(qm, qc);
1476                                                         add_query_on_top(qm, qc);
1477                                                 }
1478                                                 ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1479                                                 return qc;
1480                                         }
1481                                 }
1482                         }
1483                         if ( be_issuffix( op->o_bd, &qbase.base ))
1484                                 break;
1485                         /* Up a level */
1486                         dnParent( &qbase.base, &pdn );
1487                         qbase.base = pdn;
1488                         depth++;
1489                 }
1490
1491                 Debug( pcache_debug,
1492                         "Not answerable: Unlock QC index=%p\n",
1493                         (void *) templa, 0, 0 );
1494                 ldap_pvt_thread_rdwr_runlock(&templa->t_rwlock);
1495         }
1496         return NULL;
1497 }
1498
1499 static void
1500 free_query (CachedQuery* qc)
1501 {
1502         free(qc->q_uuid.bv_val);
1503         filter_free(qc->filter);
1504         ldap_pvt_thread_mutex_destroy(&qc->answerable_cnt_mutex);
1505         ldap_pvt_thread_rdwr_destroy( &qc->rwlock );
1506         memset(qc, 0, sizeof(*qc));
1507         free(qc);
1508 }
1509
1510
1511 /* Add query to query cache, the returned Query is locked for writing */
1512 static CachedQuery *
1513 add_query(
1514         Operation *op,
1515         query_manager* qm,
1516         Query* query,
1517         QueryTemplate *templ,
1518         pc_caching_reason_t why,
1519         int wlock)
1520 {
1521         CachedQuery* new_cached_query = (CachedQuery*) ch_malloc(sizeof(CachedQuery));
1522         Qbase *qbase, qb;
1523         Filter *first;
1524         int rc;
1525         time_t ttl = 0, ttr = 0;
1526         time_t now;
1527
1528         new_cached_query->qtemp = templ;
1529         BER_BVZERO( &new_cached_query->q_uuid );
1530         new_cached_query->q_sizelimit = 0;
1531
1532         now = slap_get_time();
1533         switch ( why ) {
1534         case PC_POSITIVE:
1535                 ttl = templ->ttl;
1536                 if ( templ->ttr )
1537                         ttr = now + templ->ttr;
1538                 break;
1539
1540         case PC_NEGATIVE:
1541                 ttl = templ->negttl;
1542                 break;
1543
1544         case PC_SIZELIMIT:
1545                 ttl = templ->limitttl;
1546                 break;
1547
1548         default:
1549                 assert( 0 );
1550                 break;
1551         }
1552         new_cached_query->expiry_time = now + ttl;
1553         new_cached_query->refresh_time = ttr;
1554
1555         new_cached_query->answerable_cnt = 0;
1556         new_cached_query->refcnt = 1;
1557         ldap_pvt_thread_mutex_init(&new_cached_query->answerable_cnt_mutex);
1558
1559         new_cached_query->lru_up = NULL;
1560         new_cached_query->lru_down = NULL;
1561         Debug( pcache_debug, "Added query expires at %ld (%s)\n",
1562                         (long) new_cached_query->expiry_time,
1563                         pc_caching_reason_str[ why ], 0 );
1564
1565         new_cached_query->scope = query->scope;
1566         new_cached_query->filter = query->filter;
1567         new_cached_query->first = first = filter_first( query->filter );
1568
1569         ldap_pvt_thread_rdwr_init(&new_cached_query->rwlock);
1570         if (wlock)
1571                 ldap_pvt_thread_rdwr_wlock(&new_cached_query->rwlock);
1572
1573         qb.base = query->base;
1574
1575         /* Adding a query    */
1576         Debug( pcache_debug, "Lock AQ index = %p\n",
1577                         (void *) templ, 0, 0 );
1578         ldap_pvt_thread_rdwr_wlock(&templ->t_rwlock);
1579         qbase = avl_find( templ->qbase, &qb, pcache_dn_cmp );
1580         if ( !qbase ) {
1581                 qbase = ch_calloc( 1, sizeof(Qbase) + qb.base.bv_len + 1 );
1582                 qbase->base.bv_len = qb.base.bv_len;
1583                 qbase->base.bv_val = (char *)(qbase+1);
1584                 memcpy( qbase->base.bv_val, qb.base.bv_val, qb.base.bv_len );
1585                 qbase->base.bv_val[qbase->base.bv_len] = '\0';
1586                 avl_insert( &templ->qbase, qbase, pcache_dn_cmp, avl_dup_error );
1587         }
1588         new_cached_query->next = templ->query;
1589         new_cached_query->prev = NULL;
1590         new_cached_query->qbase = qbase;
1591         rc = tavl_insert( &qbase->scopes[query->scope], new_cached_query,
1592                 pcache_query_cmp, avl_dup_error );
1593         if ( rc == 0 ) {
1594                 qbase->queries++;
1595                 if (templ->query == NULL)
1596                         templ->query_last = new_cached_query;
1597                 else
1598                         templ->query->prev = new_cached_query;
1599                 templ->query = new_cached_query;
1600                 templ->no_of_queries++;
1601         } else {
1602                 ch_free( new_cached_query );
1603                 new_cached_query = find_filter( op, qbase->scopes[query->scope],
1604                                                         query->filter, first );
1605                 filter_free( query->filter );
1606                 query->filter = NULL;
1607         }
1608         Debug( pcache_debug, "TEMPLATE %p QUERIES++ %d\n",
1609                         (void *) templ, templ->no_of_queries, 0 );
1610
1611         Debug( pcache_debug, "Unlock AQ index = %p \n",
1612                         (void *) templ, 0, 0 );
1613         ldap_pvt_thread_rdwr_wunlock(&templ->t_rwlock);
1614
1615         /* Adding on top of LRU list  */
1616         if ( rc == 0 ) {
1617                 ldap_pvt_thread_mutex_lock(&qm->lru_mutex);
1618                 add_query_on_top(qm, new_cached_query);
1619                 ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1620         }
1621         return rc == 0 ? new_cached_query : NULL;
1622 }
1623
1624 static void
1625 remove_from_template (CachedQuery* qc, QueryTemplate* template)
1626 {
1627         if (!qc->prev && !qc->next) {
1628                 template->query_last = template->query = NULL;
1629         } else if (qc->prev == NULL) {
1630                 qc->next->prev = NULL;
1631                 template->query = qc->next;
1632         } else if (qc->next == NULL) {
1633                 qc->prev->next = NULL;
1634                 template->query_last = qc->prev;
1635         } else {
1636                 qc->next->prev = qc->prev;
1637                 qc->prev->next = qc->next;
1638         }
1639         tavl_delete( &qc->qbase->scopes[qc->scope], qc, pcache_query_cmp );
1640         qc->qbase->queries--;
1641         if ( qc->qbase->queries == 0 ) {
1642                 avl_delete( &template->qbase, qc->qbase, pcache_dn_cmp );
1643                 ch_free( qc->qbase );
1644                 qc->qbase = NULL;
1645         }
1646
1647         template->no_of_queries--;
1648 }
1649
1650 /* remove bottom query of LRU list from the query cache */
1651 /*
1652  * NOTE: slight change in functionality.
1653  *
1654  * - if result->bv_val is NULL, the query at the bottom of the LRU
1655  *   is removed
1656  * - otherwise, the query whose UUID is *result is removed
1657  *      - if not found, result->bv_val is zeroed
1658  */
1659 static void
1660 cache_replacement(query_manager* qm, struct berval *result)
1661 {
1662         CachedQuery* bottom;
1663         QueryTemplate *temp;
1664
1665         ldap_pvt_thread_mutex_lock(&qm->lru_mutex);
1666         if ( BER_BVISNULL( result ) ) {
1667                 bottom = qm->lru_bottom;
1668
1669                 if (!bottom) {
1670                         Debug ( pcache_debug,
1671                                 "Cache replacement invoked without "
1672                                 "any query in LRU list\n", 0, 0, 0 );
1673                         ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1674                         return;
1675                 }
1676
1677         } else {
1678                 for ( bottom = qm->lru_bottom;
1679                         bottom != NULL;
1680                         bottom = bottom->lru_up )
1681                 {
1682                         if ( bvmatch( result, &bottom->q_uuid ) ) {
1683                                 break;
1684                         }
1685                 }
1686
1687                 if ( !bottom ) {
1688                         Debug ( pcache_debug,
1689                                 "Could not find query with uuid=\"%s\""
1690                                 "in LRU list\n", result->bv_val, 0, 0 );
1691                         ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1692                         BER_BVZERO( result );
1693                         return;
1694                 }
1695         }
1696
1697         temp = bottom->qtemp;
1698         remove_query(qm, bottom);
1699         ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
1700
1701         *result = bottom->q_uuid;
1702         BER_BVZERO( &bottom->q_uuid );
1703
1704         Debug( pcache_debug, "Lock CR index = %p\n", (void *) temp, 0, 0 );
1705         ldap_pvt_thread_rdwr_wlock(&temp->t_rwlock);
1706         remove_from_template(bottom, temp);
1707         Debug( pcache_debug, "TEMPLATE %p QUERIES-- %d\n",
1708                 (void *) temp, temp->no_of_queries, 0 );
1709         Debug( pcache_debug, "Unlock CR index = %p\n", (void *) temp, 0, 0 );
1710         ldap_pvt_thread_rdwr_wunlock(&temp->t_rwlock);
1711         free_query(bottom);
1712 }
1713
1714 struct query_info {
1715         struct query_info *next;
1716         struct berval xdn;
1717         int del;
1718 };
1719
1720 static int
1721 remove_func (
1722         Operation       *op,
1723         SlapReply       *rs
1724 )
1725 {
1726         Attribute *attr;
1727         struct query_info *qi;
1728         int count = 0;
1729
1730         if ( rs->sr_type != REP_SEARCH ) return 0;
1731
1732         attr = attr_find( rs->sr_entry->e_attrs,  ad_queryId );
1733         if ( attr == NULL ) return 0;
1734
1735         count = attr->a_numvals;
1736         assert( count > 0 );
1737         qi = op->o_tmpalloc( sizeof( struct query_info ), op->o_tmpmemctx );
1738         qi->next = op->o_callback->sc_private;
1739         op->o_callback->sc_private = qi;
1740         ber_dupbv_x( &qi->xdn, &rs->sr_entry->e_nname, op->o_tmpmemctx );
1741         qi->del = ( count == 1 );
1742
1743         return 0;
1744 }
1745
1746 static int
1747 remove_query_data(
1748         Operation       *op,
1749         SlapReply       *rs,
1750         struct berval   *query_uuid )
1751 {
1752         struct query_info       *qi, *qnext;
1753         char                    filter_str[ LDAP_LUTIL_UUIDSTR_BUFSIZE + STRLENOF( "(pcacheQueryID=)" ) ];
1754         AttributeAssertion      ava = ATTRIBUTEASSERTION_INIT;
1755         Filter                  filter = {LDAP_FILTER_EQUALITY};
1756         SlapReply               sreply = {REP_RESULT};
1757         slap_callback cb = { NULL, remove_func, NULL, NULL };
1758         int deleted = 0;
1759
1760         sreply.sr_entry = NULL;
1761         sreply.sr_nentries = 0;
1762         op->ors_filterstr.bv_len = snprintf(filter_str, sizeof(filter_str),
1763                 "(%s=%s)", ad_queryId->ad_cname.bv_val, query_uuid->bv_val);
1764         filter.f_ava = &ava;
1765         filter.f_av_desc = ad_queryId;
1766         filter.f_av_value = *query_uuid;
1767
1768         op->o_tag = LDAP_REQ_SEARCH;
1769         op->o_protocol = LDAP_VERSION3;
1770         op->o_callback = &cb;
1771         op->o_time = slap_get_time();
1772         op->o_do_not_cache = 1;
1773
1774         op->o_req_dn = op->o_bd->be_suffix[0];
1775         op->o_req_ndn = op->o_bd->be_nsuffix[0];
1776         op->ors_scope = LDAP_SCOPE_SUBTREE;
1777         op->ors_deref = LDAP_DEREF_NEVER;
1778         op->ors_slimit = SLAP_NO_LIMIT;
1779         op->ors_tlimit = SLAP_NO_LIMIT;
1780         op->ors_limit = NULL;
1781         op->ors_filter = &filter;
1782         op->ors_filterstr.bv_val = filter_str;
1783         op->ors_filterstr.bv_len = strlen(filter_str);
1784         op->ors_attrs = NULL;
1785         op->ors_attrsonly = 0;
1786
1787         op->o_bd->be_search( op, &sreply );
1788
1789         for ( qi=cb.sc_private; qi; qi=qnext ) {
1790                 qnext = qi->next;
1791
1792                 op->o_req_dn = qi->xdn;
1793                 op->o_req_ndn = qi->xdn;
1794
1795                 if ( qi->del ) {
1796                         Debug( pcache_debug, "DELETING ENTRY TEMPLATE=%s\n",
1797                                 query_uuid->bv_val, 0, 0 );
1798
1799                         op->o_tag = LDAP_REQ_DELETE;
1800
1801                         if (op->o_bd->be_delete(op, &sreply) == LDAP_SUCCESS) {
1802                                 deleted++;
1803                         }
1804
1805                 } else {
1806                         Modifications mod;
1807                         struct berval vals[2];
1808
1809                         vals[0] = *query_uuid;
1810                         vals[1].bv_val = NULL;
1811                         vals[1].bv_len = 0;
1812                         mod.sml_op = LDAP_MOD_DELETE;
1813                         mod.sml_flags = 0;
1814                         mod.sml_desc = ad_queryId;
1815                         mod.sml_type = ad_queryId->ad_cname;
1816                         mod.sml_values = vals;
1817                         mod.sml_nvalues = NULL;
1818                         mod.sml_numvals = 1;
1819                         mod.sml_next = NULL;
1820                         Debug( pcache_debug,
1821                                 "REMOVING TEMP ATTR : TEMPLATE=%s\n",
1822                                 query_uuid->bv_val, 0, 0 );
1823
1824                         op->orm_modlist = &mod;
1825
1826                         op->o_bd->be_modify( op, &sreply );
1827                 }
1828                 op->o_tmpfree( qi->xdn.bv_val, op->o_tmpmemctx );
1829                 op->o_tmpfree( qi, op->o_tmpmemctx );
1830         }
1831         return deleted;
1832 }
1833
1834 static int
1835 get_attr_set(
1836         AttributeName* attrs,
1837         query_manager* qm,
1838         int num
1839 );
1840
1841 static int
1842 filter2template(
1843         Operation               *op,
1844         Filter                  *f,
1845         struct                  berval *fstr )
1846 {
1847         AttributeDescription *ad;
1848         int len, ret;
1849
1850         switch ( f->f_choice ) {
1851         case LDAP_FILTER_EQUALITY:
1852                 ad = f->f_av_desc;
1853                 len = STRLENOF( "(=)" ) + ad->ad_cname.bv_len;
1854                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s=)", ad->ad_cname.bv_val );
1855                 assert( ret == len );
1856                 fstr->bv_len += len;
1857                 break;
1858
1859         case LDAP_FILTER_GE:
1860                 ad = f->f_av_desc;
1861                 len = STRLENOF( "(>=)" ) + ad->ad_cname.bv_len;
1862                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s>=)", ad->ad_cname.bv_val);
1863                 assert( ret == len );
1864                 fstr->bv_len += len;
1865                 break;
1866
1867         case LDAP_FILTER_LE:
1868                 ad = f->f_av_desc;
1869                 len = STRLENOF( "(<=)" ) + ad->ad_cname.bv_len;
1870                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s<=)", ad->ad_cname.bv_val);
1871                 assert( ret == len );
1872                 fstr->bv_len += len;
1873                 break;
1874
1875         case LDAP_FILTER_APPROX:
1876                 ad = f->f_av_desc;
1877                 len = STRLENOF( "(~=)" ) + ad->ad_cname.bv_len;
1878                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s~=)", ad->ad_cname.bv_val);
1879                 assert( ret == len );
1880                 fstr->bv_len += len;
1881                 break;
1882
1883         case LDAP_FILTER_SUBSTRINGS:
1884                 ad = f->f_sub_desc;
1885                 len = STRLENOF( "(=)" ) + ad->ad_cname.bv_len;
1886                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s=)", ad->ad_cname.bv_val );
1887                 assert( ret == len );
1888                 fstr->bv_len += len;
1889                 break;
1890
1891         case LDAP_FILTER_PRESENT:
1892                 ad = f->f_desc;
1893                 len = STRLENOF( "(=*)" ) + ad->ad_cname.bv_len;
1894                 ret = snprintf( fstr->bv_val+fstr->bv_len, len + 1, "(%s=*)", ad->ad_cname.bv_val );
1895                 assert( ret == len );
1896                 fstr->bv_len += len;
1897                 break;
1898
1899         case LDAP_FILTER_AND:
1900         case LDAP_FILTER_OR:
1901         case LDAP_FILTER_NOT: {
1902                 int rc = 0;
1903                 fstr->bv_val[fstr->bv_len++] = '(';
1904                 switch ( f->f_choice ) {
1905                 case LDAP_FILTER_AND:
1906                         fstr->bv_val[fstr->bv_len] = '&';
1907                         break;
1908                 case LDAP_FILTER_OR:
1909                         fstr->bv_val[fstr->bv_len] = '|';
1910                         break;
1911                 case LDAP_FILTER_NOT:
1912                         fstr->bv_val[fstr->bv_len] = '!';
1913                         break;
1914                 }
1915                 fstr->bv_len++;
1916
1917                 for ( f = f->f_list; f != NULL; f = f->f_next ) {
1918                         rc = filter2template( op, f, fstr );
1919                         if ( rc ) break;
1920                 }
1921                 fstr->bv_val[fstr->bv_len++] = ')';
1922                 fstr->bv_val[fstr->bv_len] = '\0';
1923
1924                 return rc;
1925                 }
1926
1927         default:
1928                 /* a filter should at least have room for "()",
1929                  * an "=" and for a 1-char attr */
1930                 strcpy( fstr->bv_val, "(?=)" );
1931                 fstr->bv_len += STRLENOF("(?=)");
1932                 return -1;
1933         }
1934
1935         return 0;
1936 }
1937
1938 #define BI_HASHED       0x01
1939 #define BI_DIDCB        0x02
1940 #define BI_LOOKUP       0x04
1941
1942 struct search_info;
1943
1944 typedef struct bindinfo {
1945         cache_manager *bi_cm;
1946         CachedQuery *bi_cq;
1947         QueryTemplate *bi_templ;
1948         struct search_info *bi_si;
1949         int bi_flags;
1950         slap_callback bi_cb;
1951 } bindinfo;
1952
1953 struct search_info {
1954         slap_overinst *on;
1955         Query query;
1956         QueryTemplate *qtemp;
1957         AttributeName*  save_attrs;     /* original attributes, saved for response */
1958         int swap_saved_attrs;
1959         int max;
1960         int over;
1961         int count;
1962         int slimit;
1963         int slimit_exceeded;
1964         pc_caching_reason_t caching_reason;
1965         Entry *head, *tail;
1966         bindinfo *pbi;
1967 };
1968
1969 static void
1970 remove_query_and_data(
1971         Operation       *op,
1972         SlapReply       *rs,
1973         cache_manager   *cm,
1974         struct berval   *uuid )
1975 {
1976         query_manager*          qm = cm->qm;
1977
1978         qm->crfunc( qm, uuid );
1979         if ( !BER_BVISNULL( uuid ) ) {
1980                 int     return_val;
1981
1982                 Debug( pcache_debug,
1983                         "Removing query UUID %s\n",
1984                         uuid->bv_val, 0, 0 );
1985                 return_val = remove_query_data( op, rs, uuid );
1986                 Debug( pcache_debug,
1987                         "QUERY REMOVED, SIZE=%d\n",
1988                         return_val, 0, 0);
1989                 ldap_pvt_thread_mutex_lock( &cm->cache_mutex );
1990                 cm->cur_entries -= return_val;
1991                 cm->num_cached_queries--;
1992                 Debug( pcache_debug,
1993                         "STORED QUERIES = %lu\n",
1994                         cm->num_cached_queries, 0, 0 );
1995                 ldap_pvt_thread_mutex_unlock( &cm->cache_mutex );
1996                 Debug( pcache_debug,
1997                         "QUERY REMOVED, CACHE ="
1998                         "%d entries\n",
1999                         cm->cur_entries, 0, 0 );
2000         }
2001 }
2002
2003 /*
2004  * Callback used to fetch queryId values based on entryUUID;
2005  * used by pcache_remove_entries_from_cache()
2006  */
2007 static int
2008 fetch_queryId_cb( Operation *op, SlapReply *rs )
2009 {
2010         int             rc = 0;
2011
2012         /* only care about searchEntry responses */
2013         if ( rs->sr_type != REP_SEARCH ) {
2014                 return 0;
2015         }
2016
2017         /* allow only one response per entryUUID */
2018         if ( op->o_callback->sc_private != NULL ) {
2019                 rc = 1;
2020
2021         } else {
2022                 Attribute       *a;
2023
2024                 /* copy all queryId values into callback's private data */
2025                 a = attr_find( rs->sr_entry->e_attrs, ad_queryId );
2026                 if ( a != NULL ) {
2027                         BerVarray       vals = NULL;
2028
2029                         ber_bvarray_dup_x( &vals, a->a_nvals, op->o_tmpmemctx );
2030                         op->o_callback->sc_private = (void *)vals;
2031                 }
2032         }
2033
2034         /* clear entry if required */
2035         if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
2036                 entry_free( rs->sr_entry );
2037                 rs->sr_entry = NULL;
2038                 rs->sr_flags ^= REP_ENTRY_MUSTBEFREED;
2039         }
2040
2041         return rc;
2042 }
2043
2044 /*
2045  * Call that allows to remove a set of entries from the cache,
2046  * by forcing the removal of all the related queries.
2047  */
2048 int
2049 pcache_remove_entries_from_cache(
2050         Operation       *op,
2051         cache_manager   *cm,
2052         BerVarray       entryUUIDs )
2053 {
2054         Connection      conn = { 0 };
2055         OperationBuffer opbuf;
2056         Operation       op2;
2057         slap_callback   sc = { 0 };
2058         SlapReply       rs = { REP_RESULT };
2059         Filter          f = { 0 };
2060         char            filtbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE + STRLENOF( "(entryUUID=)" ) ];
2061         AttributeAssertion ava = ATTRIBUTEASSERTION_INIT;
2062         AttributeName   attrs[ 2 ] = {{{ 0 }}};
2063         int             s, rc;
2064
2065         if ( op == NULL ) {
2066                 void    *thrctx = ldap_pvt_thread_pool_context();
2067
2068                 connection_fake_init( &conn, &opbuf, thrctx );
2069                 op = &opbuf.ob_op;
2070
2071         } else {
2072                 op2 = *op;
2073                 op = &op2;
2074         }
2075
2076         memset( &op->oq_search, 0, sizeof( op->oq_search ) );
2077         op->ors_scope = LDAP_SCOPE_SUBTREE;
2078         op->ors_deref = LDAP_DEREF_NEVER;
2079         f.f_choice = LDAP_FILTER_EQUALITY;
2080         f.f_ava = &ava;
2081         ava.aa_desc = slap_schema.si_ad_entryUUID;
2082         op->ors_filter = &f;
2083         op->ors_slimit = 1;
2084         op->ors_tlimit = SLAP_NO_LIMIT;
2085         op->ors_limit = NULL;
2086         attrs[ 0 ].an_desc = ad_queryId;
2087         attrs[ 0 ].an_name = ad_queryId->ad_cname;
2088         op->ors_attrs = attrs;
2089         op->ors_attrsonly = 0;
2090
2091         op->o_req_dn = cm->db.be_suffix[ 0 ];
2092         op->o_req_ndn = cm->db.be_nsuffix[ 0 ];
2093
2094         op->o_tag = LDAP_REQ_SEARCH;
2095         op->o_protocol = LDAP_VERSION3;
2096         op->o_managedsait = SLAP_CONTROL_CRITICAL;
2097         op->o_bd = &cm->db;
2098         op->o_dn = op->o_bd->be_rootdn;
2099         op->o_ndn = op->o_bd->be_rootndn;
2100         sc.sc_response = fetch_queryId_cb;
2101         op->o_callback = &sc;
2102
2103         for ( s = 0; !BER_BVISNULL( &entryUUIDs[ s ] ); s++ ) {
2104                 BerVarray       vals = NULL;
2105
2106                 op->ors_filterstr.bv_len = snprintf( filtbuf, sizeof( filtbuf ),
2107                         "(entryUUID=%s)", entryUUIDs[ s ].bv_val );
2108                 op->ors_filterstr.bv_val = filtbuf;
2109                 ava.aa_value = entryUUIDs[ s ];
2110
2111                 rc = op->o_bd->be_search( op, &rs );
2112                 if ( rc != LDAP_SUCCESS ) {
2113                         continue;
2114                 }
2115
2116                 vals = (BerVarray)op->o_callback->sc_private;
2117                 if ( vals != NULL ) {
2118                         int             i;
2119
2120                         for ( i = 0; !BER_BVISNULL( &vals[ i ] ); i++ ) {
2121                                 struct berval   val = vals[ i ];
2122
2123                                 remove_query_and_data( op, &rs, cm, &val );
2124
2125                                 if ( !BER_BVISNULL( &val ) && val.bv_val != vals[ i ].bv_val ) {
2126                                         ch_free( val.bv_val );
2127                                 }
2128                         }
2129
2130                         ber_bvarray_free_x( vals, op->o_tmpmemctx );
2131                         op->o_callback->sc_private = NULL;
2132                 }
2133         }
2134
2135         return 0;
2136 }
2137
2138 /*
2139  * Call that allows to remove a query from the cache.
2140  */
2141 int
2142 pcache_remove_query_from_cache(
2143         Operation       *op,
2144         cache_manager   *cm,
2145         struct berval   *queryid )
2146 {
2147         Operation       op2 = *op;
2148         SlapReply       rs2 = { 0 };
2149
2150         op2.o_bd = &cm->db;
2151
2152         /* remove the selected query */
2153         remove_query_and_data( &op2, &rs2, cm, queryid );
2154
2155         return LDAP_SUCCESS;
2156 }
2157
2158 /*
2159  * Call that allows to remove a set of queries related to an entry
2160  * from the cache; if queryid is not null, the entry must belong to
2161  * the query indicated by queryid.
2162  */
2163 int
2164 pcache_remove_entry_queries_from_cache(
2165         Operation       *op,
2166         cache_manager   *cm,
2167         struct berval   *ndn,
2168         struct berval   *queryid )
2169 {
2170         Connection              conn = { 0 };
2171         OperationBuffer         opbuf;
2172         Operation               op2;
2173         slap_callback           sc = { 0 };
2174         SlapReply               rs = { REP_RESULT };
2175         Filter                  f = { 0 };
2176         char                    filter_str[ LDAP_LUTIL_UUIDSTR_BUFSIZE + STRLENOF( "(pcacheQueryID=)" ) ];
2177         AttributeAssertion      ava = ATTRIBUTEASSERTION_INIT;
2178         AttributeName           attrs[ 2 ] = {{{ 0 }}};
2179         int                     rc;
2180
2181         BerVarray               vals = NULL;
2182
2183         if ( op == NULL ) {
2184                 void    *thrctx = ldap_pvt_thread_pool_context();
2185
2186                 connection_fake_init( &conn, &opbuf, thrctx );
2187                 op = &opbuf.ob_op;
2188
2189         } else {
2190                 op2 = *op;
2191                 op = &op2;
2192         }
2193
2194         memset( &op->oq_search, 0, sizeof( op->oq_search ) );
2195         op->ors_scope = LDAP_SCOPE_BASE;
2196         op->ors_deref = LDAP_DEREF_NEVER;
2197         if ( queryid == NULL || BER_BVISNULL( queryid ) ) {
2198                 BER_BVSTR( &op->ors_filterstr, "(objectClass=*)" );
2199                 f.f_choice = LDAP_FILTER_PRESENT;
2200                 f.f_desc = slap_schema.si_ad_objectClass;
2201
2202         } else {
2203                 op->ors_filterstr.bv_len = snprintf( filter_str,
2204                         sizeof( filter_str ), "(%s=%s)",
2205                         ad_queryId->ad_cname.bv_val, queryid->bv_val );
2206                 f.f_choice = LDAP_FILTER_EQUALITY;
2207                 f.f_ava = &ava;
2208                 f.f_av_desc = ad_queryId;
2209                 f.f_av_value = *queryid;
2210         }
2211         op->ors_filter = &f;
2212         op->ors_slimit = 1;
2213         op->ors_tlimit = SLAP_NO_LIMIT;
2214         op->ors_limit = NULL;
2215         attrs[ 0 ].an_desc = ad_queryId;
2216         attrs[ 0 ].an_name = ad_queryId->ad_cname;
2217         op->ors_attrs = attrs;
2218         op->ors_attrsonly = 0;
2219
2220         op->o_req_dn = *ndn;
2221         op->o_req_ndn = *ndn;
2222
2223         op->o_tag = LDAP_REQ_SEARCH;
2224         op->o_protocol = LDAP_VERSION3;
2225         op->o_managedsait = SLAP_CONTROL_CRITICAL;
2226         op->o_bd = &cm->db;
2227         op->o_dn = op->o_bd->be_rootdn;
2228         op->o_ndn = op->o_bd->be_rootndn;
2229         sc.sc_response = fetch_queryId_cb;
2230         op->o_callback = &sc;
2231
2232         rc = op->o_bd->be_search( op, &rs );
2233         if ( rc != LDAP_SUCCESS ) {
2234                 return rc;
2235         }
2236
2237         vals = (BerVarray)op->o_callback->sc_private;
2238         if ( vals != NULL ) {
2239                 int             i;
2240
2241                 for ( i = 0; !BER_BVISNULL( &vals[ i ] ); i++ ) {
2242                         struct berval   val = vals[ i ];
2243
2244                         remove_query_and_data( op, &rs, cm, &val );
2245
2246                         if ( !BER_BVISNULL( &val ) && val.bv_val != vals[ i ].bv_val ) {
2247                                 ch_free( val.bv_val );
2248                         }
2249                 }
2250
2251                 ber_bvarray_free_x( vals, op->o_tmpmemctx );
2252         }
2253
2254         return LDAP_SUCCESS;
2255 }
2256
2257 static int
2258 cache_entries(
2259         Operation       *op,
2260         SlapReply       *rs,
2261         struct berval *query_uuid )
2262 {
2263         struct search_info *si = op->o_callback->sc_private;
2264         slap_overinst *on = si->on;
2265         cache_manager *cm = on->on_bi.bi_private;
2266         int             return_val = 0;
2267         Entry           *e;
2268         struct berval   crp_uuid;
2269         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ];
2270         Operation       *op_tmp;
2271         Connection      conn = {0};
2272         OperationBuffer opbuf;
2273         void            *thrctx = ldap_pvt_thread_pool_context();
2274
2275         query_uuid->bv_len = lutil_uuidstr(uuidbuf, sizeof(uuidbuf));
2276         ber_str2bv(uuidbuf, query_uuid->bv_len, 1, query_uuid);
2277
2278         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
2279         op_tmp = &opbuf.ob_op;
2280         op_tmp->o_bd = &cm->db;
2281         op_tmp->o_dn = cm->db.be_rootdn;
2282         op_tmp->o_ndn = cm->db.be_rootndn;
2283
2284         Debug( pcache_debug, "UUID for query being added = %s\n",
2285                         uuidbuf, 0, 0 );
2286
2287         for ( e=si->head; e; e=si->head ) {
2288                 si->head = e->e_private;
2289                 e->e_private = NULL;
2290                 while ( cm->cur_entries > (cm->max_entries) ) {
2291                         BER_BVZERO( &crp_uuid );
2292                         remove_query_and_data( op_tmp, rs, cm, &crp_uuid );
2293                 }
2294
2295                 return_val = merge_entry(op_tmp, e, 0, query_uuid);
2296                 ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
2297                 cm->cur_entries += return_val;
2298                 Debug( pcache_debug,
2299                         "ENTRY ADDED/MERGED, CACHED ENTRIES=%d\n",
2300                         cm->cur_entries, 0, 0 );
2301                 return_val = 0;
2302                 ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
2303         }
2304
2305         return return_val;
2306 }
2307
2308 static int
2309 pcache_op_cleanup( Operation *op, SlapReply *rs ) {
2310         slap_callback   *cb = op->o_callback;
2311         struct search_info *si = cb->sc_private;
2312         slap_overinst *on = si->on;
2313         cache_manager *cm = on->on_bi.bi_private;
2314         query_manager*          qm = cm->qm;
2315
2316         if ( rs->sr_type == REP_SEARCH ) {
2317                 Entry *e;
2318
2319                 /* don't return more entries than requested by the client */
2320                 if ( si->slimit > 0 && rs->sr_nentries >= si->slimit ) {
2321                         si->slimit_exceeded = 1;
2322                 }
2323
2324                 /* If we haven't exceeded the limit for this query,
2325                  * build a chain of answers to store. If we hit the
2326                  * limit, empty the chain and ignore the rest.
2327                  */
2328                 if ( !si->over ) {
2329                         /* check if the entry contains undefined
2330                          * attributes/objectClasses (ITS#5680) */
2331                         if ( cm->check_cacheability && test_filter( op, rs->sr_entry, si->query.filter ) != LDAP_COMPARE_TRUE ) {
2332                                 Debug( pcache_debug, "%s: query not cacheable because of schema issues in DN \"%s\"\n",
2333                                         op->o_log_prefix, rs->sr_entry->e_name.bv_val, 0 );
2334                                 goto over;
2335                         }
2336
2337                         /* check for malformed entries: attrs with no values */
2338                         {
2339                                 Attribute *a = rs->sr_entry->e_attrs;
2340                                 for (; a; a=a->a_next) {
2341                                         if ( !a->a_numvals ) {
2342                                                 Debug( pcache_debug, "%s: query not cacheable because of attrs without values in DN \"%s\" (%s)\n",
2343                                                 op->o_log_prefix, rs->sr_entry->e_name.bv_val,
2344                                                 a->a_desc->ad_cname.bv_val );
2345                                                 goto over;
2346                                         }
2347                                 }
2348                         }
2349
2350                         if ( si->count < si->max ) {
2351                                 si->count++;
2352                                 e = entry_dup( rs->sr_entry );
2353                                 if ( !si->head ) si->head = e;
2354                                 if ( si->tail ) si->tail->e_private = e;
2355                                 si->tail = e;
2356
2357                         } else {
2358 over:;
2359                                 si->over = 1;
2360                                 si->count = 0;
2361                                 for (;si->head; si->head=e) {
2362                                         e = si->head->e_private;
2363                                         si->head->e_private = NULL;
2364                                         entry_free(si->head);
2365                                 }
2366                                 si->tail = NULL;
2367                         }
2368                 }
2369
2370         }
2371
2372         if ( rs->sr_type == REP_RESULT ||
2373                 op->o_abandon || rs->sr_err == SLAPD_ABANDON )
2374         {
2375                 if ( si->swap_saved_attrs ) {
2376                         rs->sr_attrs = si->save_attrs;
2377                         op->ors_attrs = si->save_attrs;
2378                 }
2379                 if ( (op->o_abandon || rs->sr_err == SLAPD_ABANDON) &&
2380                                 si->caching_reason == PC_IGNORE )
2381                 {
2382                         filter_free( si->query.filter );
2383                         if ( si->count ) {
2384                                 /* duplicate query, free it */
2385                                 Entry *e;
2386                                 for (;si->head; si->head=e) {
2387                                         e = si->head->e_private;
2388                                         si->head->e_private = NULL;
2389                                         entry_free(si->head);
2390                                 }
2391                         }
2392                         op->o_callback = op->o_callback->sc_next;
2393                         op->o_tmpfree( cb, op->o_tmpmemctx );
2394                 } else if ( si->caching_reason != PC_IGNORE ) {
2395                         CachedQuery *qc = qm->addfunc(op, qm, &si->query,
2396                                 si->qtemp, si->caching_reason, 1 );
2397
2398                         if ( qc != NULL ) {
2399                                 switch ( si->caching_reason ) {
2400                                 case PC_POSITIVE:
2401                                         cache_entries( op, rs, &qc->q_uuid );
2402                                         if ( si->pbi )
2403                                                 si->pbi->bi_cq = qc;
2404                                         break;
2405
2406                                 case PC_SIZELIMIT:
2407                                         qc->q_sizelimit = rs->sr_nentries;
2408                                         break;
2409
2410                                 case PC_NEGATIVE:
2411                                         break;
2412
2413                                 default:
2414                                         assert( 0 );
2415                                         break;
2416                                 }
2417                                 ldap_pvt_thread_rdwr_wunlock(&qc->rwlock);
2418                                 ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
2419                                 cm->num_cached_queries++;
2420                                 Debug( pcache_debug, "STORED QUERIES = %lu\n",
2421                                                 cm->num_cached_queries, 0, 0 );
2422                                 ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
2423
2424                                 /* If the consistency checker suspended itself,
2425                                  * wake it back up
2426                                  */
2427                                 if ( cm->cc_paused == PCACHE_CC_PAUSED ) {
2428                                         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
2429                                         if ( cm->cc_paused == PCACHE_CC_PAUSED ) {
2430                                                 cm->cc_paused = 0;
2431                                                 ldap_pvt_runqueue_resched( &slapd_rq, cm->cc_arg, 0 );
2432                                         }
2433                                         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
2434                                 }
2435
2436                         } else if ( si->count ) {
2437                                 /* duplicate query, free it */
2438                                 Entry *e;
2439                                 for (;si->head; si->head=e) {
2440                                         e = si->head->e_private;
2441                                         si->head->e_private = NULL;
2442                                         entry_free(si->head);
2443                                 }
2444                         }
2445
2446                 } else {
2447                         filter_free( si->query.filter );
2448                 }
2449         }
2450
2451         return SLAP_CB_CONTINUE;
2452 }
2453
2454 static int
2455 pcache_response(
2456         Operation       *op,
2457         SlapReply       *rs )
2458 {
2459         struct search_info *si = op->o_callback->sc_private;
2460
2461         if ( si->swap_saved_attrs ) {
2462                 rs->sr_attrs = si->save_attrs;
2463                 op->ors_attrs = si->save_attrs;
2464         }
2465
2466         if ( rs->sr_type == REP_SEARCH ) {
2467                 /* don't return more entries than requested by the client */
2468                 if ( si->slimit_exceeded ) {
2469                         return 0;
2470                 }
2471
2472         } else if ( rs->sr_type == REP_RESULT ) {
2473
2474                 if ( si->count ) {
2475                         if ( rs->sr_err == LDAP_SUCCESS ) {
2476                                 si->caching_reason = PC_POSITIVE;
2477
2478                         } else if ( rs->sr_err == LDAP_SIZELIMIT_EXCEEDED
2479                                 && si->qtemp->limitttl )
2480                         {
2481                                 Entry *e;
2482
2483                                 si->caching_reason = PC_SIZELIMIT;
2484                                 for (;si->head; si->head=e) {
2485                                         e = si->head->e_private;
2486                                         si->head->e_private = NULL;
2487                                         entry_free(si->head);
2488                                 }
2489                         }
2490
2491                 } else if ( si->qtemp->negttl && !si->count && !si->over &&
2492                                 rs->sr_err == LDAP_SUCCESS )
2493                 {
2494                         si->caching_reason = PC_NEGATIVE;
2495                 }
2496
2497
2498                 if ( si->slimit_exceeded ) {
2499                         rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
2500                 }
2501         }
2502
2503         return SLAP_CB_CONTINUE;
2504 }
2505
2506 /* NOTE: this is a quick workaround to let pcache minimally interact
2507  * with pagedResults.  A more articulated solutions would be to
2508  * perform the remote query without control and cache all results,
2509  * performing the pagedResults search only within the client
2510  * and the proxy.  This requires pcache to understand pagedResults. */
2511 static int
2512 pcache_chk_controls(
2513         Operation       *op,
2514         SlapReply       *rs )
2515 {
2516         const char      *non = "";
2517         const char      *stripped = "";
2518
2519         switch( op->o_pagedresults ) {
2520         case SLAP_CONTROL_NONCRITICAL:
2521                 non = "non-";
2522                 stripped = "; stripped";
2523                 /* fallthru */
2524
2525         case SLAP_CONTROL_CRITICAL:
2526                 Debug( pcache_debug, "%s: "
2527                         "%scritical pagedResults control "
2528                         "disabled with proxy cache%s.\n",
2529                         op->o_log_prefix, non, stripped );
2530
2531                 slap_remove_control( op, rs, slap_cids.sc_pagedResults, NULL );
2532                 break;
2533
2534         default:
2535                 rs->sr_err = SLAP_CB_CONTINUE;
2536                 break;
2537         }
2538
2539         return rs->sr_err;
2540 }
2541
2542 static int
2543 pc_setpw( Operation *op, struct berval *pwd, cache_manager *cm )
2544 {
2545         struct berval vals[2];
2546
2547         {
2548                 const char *text = NULL;
2549                 BER_BVZERO( &vals[0] );
2550                 slap_passwd_hash( pwd, &vals[0], &text );
2551                 if ( BER_BVISEMPTY( &vals[0] )) {
2552                         Debug( pcache_debug, "pc_setpw: hash failed %s\n",
2553                                 text, 0, 0 );
2554                         return LDAP_OTHER;
2555                 }
2556         }
2557
2558         BER_BVZERO( &vals[1] );
2559
2560         {
2561                 Modifications mod;
2562                 SlapReply sr = { REP_RESULT };
2563                 slap_callback cb = { 0, slap_null_cb, 0, 0 };
2564                 int rc;
2565
2566                 mod.sml_op = LDAP_MOD_REPLACE;
2567                 mod.sml_flags = 0;
2568                 mod.sml_desc = slap_schema.si_ad_userPassword;
2569                 mod.sml_type = mod.sml_desc->ad_cname;
2570                 mod.sml_values = vals;
2571                 mod.sml_nvalues = NULL;
2572                 mod.sml_numvals = 1;
2573                 mod.sml_next = NULL;
2574
2575                 op->o_tag = LDAP_REQ_MODIFY;
2576                 op->orm_modlist = &mod;
2577                 op->o_bd = &cm->db;
2578                 op->o_dn = op->o_bd->be_rootdn;
2579                 op->o_ndn = op->o_bd->be_rootndn;
2580                 op->o_callback = &cb;
2581                 Debug( pcache_debug, "pc_setpw: CACHING BIND for %s\n",
2582                         op->o_req_dn.bv_val, 0, 0 );
2583                 rc = op->o_bd->be_modify( op, &sr );
2584                 ch_free( vals[0].bv_val );
2585                 return rc;
2586         }
2587 }
2588
2589 typedef struct bindcacheinfo {
2590         slap_overinst *on;
2591         CachedQuery *qc;
2592 } bindcacheinfo;
2593
2594 static int
2595 pc_bind_save( Operation *op, SlapReply *rs )
2596 {
2597         if ( rs->sr_err == LDAP_SUCCESS ) {
2598                 bindcacheinfo *bci = op->o_callback->sc_private;
2599                 slap_overinst *on = bci->on;
2600                 cache_manager *cm = on->on_bi.bi_private;
2601
2602                 Operation op2 = *op;
2603                 if ( pc_setpw( &op2, &op->orb_cred, cm ) == LDAP_SUCCESS )
2604                         bci->qc->bindref_time = op->o_time + bci->qc->qtemp->bindttr;
2605         }
2606         return SLAP_CB_CONTINUE;
2607 }
2608
2609 static Filter *
2610 pc_bind_attrs( Operation *op, Entry *e, QueryTemplate *temp,
2611         struct berval *fbv )
2612 {
2613         int i, len = 0;
2614         struct berval *vals, pres = BER_BVC("*");
2615         char *p1, *p2, *t1;
2616         Attribute *a;
2617
2618         vals = op->o_tmpalloc( temp->bindnattrs * sizeof( struct berval ),
2619                 op->o_tmpmemctx );
2620
2621         for ( i=0; i<temp->bindnattrs; i++ ) {
2622                 a = attr_find( e->e_attrs, temp->bindfattrs[i] );
2623                 if ( a && a->a_vals ) {
2624                         vals[i] = a->a_vals[0];
2625                         len += a->a_vals[0].bv_len;
2626                 } else {
2627                         vals[i] = pres;
2628                 }
2629         }
2630         fbv->bv_len = len + temp->bindftemp.bv_len;
2631         fbv->bv_val = op->o_tmpalloc( fbv->bv_len + 1, op->o_tmpmemctx );
2632
2633         p1 = temp->bindftemp.bv_val;
2634         p2 = fbv->bv_val;
2635         i = 0;
2636         while ( *p1 ) {
2637                 *p2++ = *p1;
2638                 if ( p1[0] == '=' && p1[1] == ')' ) {
2639                         AC_MEMCPY( p2, vals[i].bv_val, vals[i].bv_len );
2640                         p2 += vals[i].bv_len;
2641                         i++;
2642                 }
2643                 p1++;
2644         }
2645         *p2 = '\0';
2646         op->o_tmpfree( vals, op->o_tmpmemctx );
2647
2648         /* FIXME: are we sure str2filter_x can't fail?
2649          * caller needs to check */
2650         {
2651                 Filter *f = str2filter_x( op, fbv->bv_val );
2652                 assert( f != NULL );
2653                 return f;
2654         }
2655 }
2656
2657 /* Check if the requested entry is from the cache and has a valid
2658  * ttr and password hash
2659  */
2660 static int
2661 pc_bind_search( Operation *op, SlapReply *rs )
2662 {
2663         if ( rs->sr_type == REP_SEARCH ) {
2664                 bindinfo *pbi = op->o_callback->sc_private;
2665
2666                 /* We only care if this is an already cached result and we're
2667                  * below the refresh time, or we're offline.
2668                  */
2669                 if ( pbi->bi_cq ) {
2670                         if (( pbi->bi_cm->cc_paused & PCACHE_CC_OFFLINE ) ||
2671                                 op->o_time < pbi->bi_cq->bindref_time ) {
2672                                 Attribute *a;
2673
2674                                 /* See if a recognized password is hashed here */
2675                                 a = attr_find( rs->sr_entry->e_attrs,
2676                                         slap_schema.si_ad_userPassword );
2677                                 if ( a && a->a_vals[0].bv_val[0] == '{' &&
2678                                         lutil_passwd_scheme( a->a_vals[0].bv_val ))
2679                                         pbi->bi_flags |= BI_HASHED;
2680                         } else {
2681                                 Debug( pcache_debug, "pc_bind_search: cache is stale, "
2682                                         "reftime: %ld, current time: %ld\n",
2683                                         pbi->bi_cq->bindref_time, op->o_time, 0 );
2684                         }
2685                 } else if ( pbi->bi_si ) {
2686                         /* This search result is going into the cache */
2687                         struct berval fbv;
2688                         Filter *f;
2689
2690                         filter_free( pbi->bi_si->query.filter );
2691                         f = pc_bind_attrs( op, rs->sr_entry, pbi->bi_templ, &fbv );
2692                         op->o_tmpfree( fbv.bv_val, op->o_tmpmemctx );
2693                         pbi->bi_si->query.filter = filter_dup( f, NULL );
2694                         filter_free_x( op, f, 1 );
2695                 }
2696         }
2697         return 0;
2698 }
2699
2700 /* We always want pc_bind_search to run after the search handlers */
2701 static int
2702 pc_bind_resp( Operation *op, SlapReply *rs )
2703 {
2704         bindinfo *pbi = op->o_callback->sc_private;
2705         if ( !( pbi->bi_flags & BI_DIDCB )) {
2706                 slap_callback *sc = op->o_callback;
2707                 while ( sc && sc->sc_response != pcache_response )
2708                         sc = sc->sc_next;
2709                 if ( !sc )
2710                         sc = op->o_callback;
2711                 pbi->bi_cb.sc_next = sc->sc_next;
2712                 sc->sc_next = &pbi->bi_cb;
2713                 pbi->bi_flags |= BI_DIDCB;
2714         }
2715         return SLAP_CB_CONTINUE;
2716 }
2717
2718 #ifdef PCACHE_CONTROL_PRIVDB
2719 static int
2720 pcache_op_privdb(
2721         Operation               *op,
2722         SlapReply               *rs )
2723 {
2724         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
2725         cache_manager   *cm = on->on_bi.bi_private;
2726         slap_callback   *save_cb;
2727         slap_op_t       type;
2728
2729         /* skip if control is unset */
2730         if ( op->o_ctrlflag[ privDB_cid ] != SLAP_CONTROL_CRITICAL ) {
2731                 return SLAP_CB_CONTINUE;
2732         }
2733
2734         /* The cache DB isn't open yet */
2735         if ( cm->defer_db_open ) {
2736                 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
2737                         "pcachePrivDB: cacheDB not available" );
2738                 return rs->sr_err;
2739         }
2740
2741         /* FIXME: might be a little bit exaggerated... */
2742         if ( !be_isroot( op ) ) {
2743                 save_cb = op->o_callback;
2744                 op->o_callback = NULL;
2745                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
2746                         "pcachePrivDB: operation not allowed" );
2747                 op->o_callback = save_cb;
2748
2749                 return rs->sr_err;
2750         }
2751
2752         /* map tag to operation */
2753         type = slap_req2op( op->o_tag );
2754         if ( type != SLAP_OP_LAST ) {
2755                 BI_op_func      **func;
2756                 int             rc;
2757
2758                 /* execute, if possible */
2759                 func = &cm->db.be_bind;
2760                 if ( func[ type ] != NULL ) {
2761                         Operation       op2 = *op;
2762
2763                         op2.o_bd = &cm->db;
2764
2765                         rc = func[ type ]( &op2, rs );
2766                         if ( type == SLAP_OP_BIND && rc == LDAP_SUCCESS ) {
2767                                 op->o_conn->c_authz_cookie = cm->db.be_private;
2768                         }
2769
2770                         return rs->sr_err;
2771                 }
2772         }
2773
2774         /* otherwise fall back to error */
2775         save_cb = op->o_callback;
2776         op->o_callback = NULL;
2777         send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
2778                 "operation not supported with pcachePrivDB control" );
2779         op->o_callback = save_cb;
2780
2781         return rs->sr_err;
2782 }
2783 #endif /* PCACHE_CONTROL_PRIVDB */
2784
2785 static int
2786 pcache_op_bind(
2787         Operation               *op,
2788         SlapReply               *rs )
2789 {
2790         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
2791         cache_manager   *cm = on->on_bi.bi_private;
2792         QueryTemplate *temp;
2793         Entry *e;
2794         slap_callback   cb = { 0 }, *sc;
2795         bindinfo bi;
2796         bindcacheinfo *bci;
2797         Operation op2;
2798         int rc;
2799
2800 #ifdef PCACHE_CONTROL_PRIVDB
2801         if ( op->o_ctrlflag[ privDB_cid ] == SLAP_CONTROL_CRITICAL )
2802                 return pcache_op_privdb( op, rs );
2803 #endif /* PCACHE_CONTROL_PRIVDB */
2804
2805         /* Skip if we're not configured for Binds, or cache DB isn't open yet */
2806         if ( !cm->cache_binds || cm->defer_db_open )
2807                 return SLAP_CB_CONTINUE;
2808
2809         /* First find a matching template with Bind info */
2810         for ( temp=cm->qm->templates; temp; temp=temp->qmnext ) {
2811                 if ( temp->bindttr && dnIsSuffix( &op->o_req_ndn, &temp->bindbase ))
2812                         break;
2813         }
2814         /* Didn't find a suitable template, just passthru */
2815         if ( !temp )
2816                 return SLAP_CB_CONTINUE;
2817
2818         /* See if the entry is already locally cached. If so, we can
2819          * populate the query filter to retrieve the cached query. We
2820          * need to check the bindrefresh time in the query.
2821          */
2822         op2 = *op;
2823         op2.o_dn = op->o_bd->be_rootdn;
2824         op2.o_ndn = op->o_bd->be_rootndn;
2825         bi.bi_flags = 0;
2826
2827         op2.o_bd = &cm->db;
2828         e = NULL;
2829         rc = be_entry_get_rw( &op2, &op->o_req_ndn, NULL, NULL, 0, &e );
2830         if ( rc == LDAP_SUCCESS && e ) {
2831                 bi.bi_flags |= BI_LOOKUP;
2832                 op2.ors_filter = pc_bind_attrs( op, e, temp, &op2.ors_filterstr );
2833                 be_entry_release_r( &op2, e );
2834         } else {
2835                 op2.ors_filter = temp->bindfilter;
2836                 op2.ors_filterstr = temp->bindfilterstr;
2837         }
2838
2839         op2.o_bd = op->o_bd;
2840         op2.o_tag = LDAP_REQ_SEARCH;
2841         op2.ors_scope = LDAP_SCOPE_BASE;
2842         op2.ors_deref = LDAP_DEREF_NEVER;
2843         op2.ors_slimit = 1;
2844         op2.ors_tlimit = SLAP_NO_LIMIT;
2845         op2.ors_limit = NULL;
2846         op2.ors_attrs = cm->qm->attr_sets[temp->attr_set_index].attrs;
2847         op2.ors_attrsonly = 0;
2848
2849         /* We want to invoke search at the same level of the stack
2850          * as we're already at...
2851          */
2852         bi.bi_cm = cm;
2853         bi.bi_templ = temp;
2854         bi.bi_cq = NULL;
2855         bi.bi_si = NULL;
2856
2857         bi.bi_cb.sc_response = pc_bind_search;
2858         bi.bi_cb.sc_cleanup = NULL;
2859         bi.bi_cb.sc_private = &bi;
2860         cb.sc_private = &bi;
2861         cb.sc_response = pc_bind_resp;
2862         op2.o_callback = &cb;
2863         overlay_op_walk( &op2, rs, op_search, on->on_info, on );
2864
2865         /* OK, just bind locally */
2866         if ( bi.bi_flags & BI_HASHED ) {
2867                 BackendDB *be = op->o_bd;
2868                 op->o_bd = &cm->db;
2869
2870                 Debug( pcache_debug, "pcache_op_bind: CACHED BIND for %s\n",
2871                         op->o_req_dn.bv_val, 0, 0 );
2872
2873                 if ( op->o_bd->be_bind( op, rs ) == LDAP_SUCCESS ) {
2874                         op->o_conn->c_authz_cookie = cm->db.be_private;
2875                 }
2876                 op->o_bd = be;
2877                 return rs->sr_err;
2878         }
2879
2880         /* We have a cached query to work with */
2881         if ( bi.bi_cq ) {
2882                 sc = op->o_tmpalloc( sizeof(slap_callback) + sizeof(bindcacheinfo),
2883                         op->o_tmpmemctx );
2884                 sc->sc_response = pc_bind_save;
2885                 sc->sc_cleanup = NULL;
2886                 sc->sc_private = sc+1;
2887                 bci = sc->sc_private;
2888                 sc->sc_next = op->o_callback;
2889                 op->o_callback = sc;
2890                 bci->on = on;
2891                 bci->qc = bi.bi_cq;
2892         }
2893         return SLAP_CB_CONTINUE;
2894 }
2895
2896 static int
2897 pcache_op_search(
2898         Operation       *op,
2899         SlapReply       *rs )
2900 {
2901         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
2902         cache_manager *cm = on->on_bi.bi_private;
2903         query_manager*          qm = cm->qm;
2904
2905         int i = -1;
2906
2907         Query           query;
2908         QueryTemplate   *qtemp = NULL;
2909         bindinfo *pbi = NULL;
2910
2911         int             attr_set = -1;
2912         CachedQuery     *answerable = NULL;
2913         int             cacheable = 0;
2914
2915         struct berval   tempstr;
2916
2917 #ifdef PCACHE_CONTROL_PRIVDB
2918         if ( op->o_ctrlflag[ privDB_cid ] == SLAP_CONTROL_CRITICAL ) {
2919                 return pcache_op_privdb( op, rs );
2920         }
2921 #endif /* PCACHE_CONTROL_PRIVDB */
2922
2923         /* The cache DB isn't open yet */
2924         if ( cm->defer_db_open ) {
2925                 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
2926                         "pcachePrivDB: cacheDB not available" );
2927                 return rs->sr_err;
2928         }
2929
2930         /* pickup runtime ACL changes */
2931         cm->db.be_acl = op->o_bd->be_acl;
2932
2933         {
2934                 /* See if we're processing a Bind request */
2935                 slap_callback *cb = op->o_callback;
2936
2937                 for ( ; cb; cb=cb->sc_next ) {
2938                         if ( cb->sc_response == pc_bind_resp ) {
2939                                 pbi = cb->sc_private;
2940                                 break;
2941                         }
2942                 }
2943         }
2944
2945         /* FIXME: cannot cache/answer requests with pagedResults control */
2946
2947         query.filter = op->ors_filter;
2948
2949         if ( pbi ) {
2950                 query.base = pbi->bi_templ->bindbase;
2951                 query.scope = pbi->bi_templ->bindscope;
2952                 attr_set = pbi->bi_templ->attr_set_index;
2953                 cacheable = 1;
2954                 qtemp = pbi->bi_templ;
2955                 if ( pbi->bi_flags & BI_LOOKUP )
2956                         answerable = qm->qcfunc(op, qm, &query, qtemp);
2957
2958         } else {
2959                 tempstr.bv_val = op->o_tmpalloc( op->ors_filterstr.bv_len+1,
2960                         op->o_tmpmemctx );
2961                 tempstr.bv_len = 0;
2962                 if ( filter2template( op, op->ors_filter, &tempstr ))
2963                 {
2964                         op->o_tmpfree( tempstr.bv_val, op->o_tmpmemctx );
2965                         return SLAP_CB_CONTINUE;
2966                 }
2967
2968                 Debug( pcache_debug, "query template of incoming query = %s\n",
2969                                                 tempstr.bv_val, 0, 0 );
2970
2971                 /* find attr set */
2972                 attr_set = get_attr_set(op->ors_attrs, qm, cm->numattrsets);
2973
2974                 query.base = op->o_req_ndn;
2975                 query.scope = op->ors_scope;
2976
2977                 /* check for query containment */
2978                 if (attr_set > -1) {
2979                         QueryTemplate *qt = qm->attr_sets[attr_set].templates;
2980                         for (; qt; qt = qt->qtnext ) {
2981                                 /* find if template i can potentially answer tempstr */
2982                                 if ( ber_bvstrcasecmp( &qt->querystr, &tempstr ) != 0 )
2983                                         continue;
2984                                 cacheable = 1;
2985                                 qtemp = qt;
2986                                 Debug( pcache_debug, "Entering QC, querystr = %s\n",
2987                                                 op->ors_filterstr.bv_val, 0, 0 );
2988                                 answerable = qm->qcfunc(op, qm, &query, qt);
2989
2990                                 /* if != NULL, rlocks qtemp->t_rwlock */
2991                                 if (answerable)
2992                                         break;
2993                         }
2994                 }
2995                 op->o_tmpfree( tempstr.bv_val, op->o_tmpmemctx );
2996         }
2997
2998         if (answerable) {
2999                 BackendDB       *save_bd = op->o_bd;
3000
3001                 ldap_pvt_thread_mutex_lock( &answerable->answerable_cnt_mutex );
3002                 answerable->answerable_cnt++;
3003                 /* we only care about refcnts if we're refreshing */
3004                 if ( answerable->refresh_time )
3005                         answerable->refcnt++;
3006                 Debug( pcache_debug, "QUERY ANSWERABLE (answered %lu times)\n",
3007                         answerable->answerable_cnt, 0, 0 );
3008                 ldap_pvt_thread_mutex_unlock( &answerable->answerable_cnt_mutex );
3009
3010                 ldap_pvt_thread_rdwr_rlock(&answerable->rwlock);
3011                 if ( BER_BVISNULL( &answerable->q_uuid )) {
3012                         /* No entries cached, just an empty result set */
3013                         i = rs->sr_err = 0;
3014                         send_ldap_result( op, rs );
3015                 } else {
3016                         /* Let Bind know we used a cached query */
3017                         if ( pbi )
3018                                 pbi->bi_cq = answerable;
3019
3020                         op->o_bd = &cm->db;
3021                         if ( cm->response_cb == PCACHE_RESPONSE_CB_TAIL ) {
3022                                 slap_callback cb;
3023                                 /* The cached entry was already processed by any
3024                                  * other overlays, so don't let it get processed again.
3025                                  *
3026                                  * This loop removes over_back_response from the stack.
3027                                  */
3028                                 if ( overlay_callback_after_backover( op, &cb, 0) == 0 ) {
3029                                         slap_callback **scp;
3030                                         for ( scp = &op->o_callback; *scp != NULL;
3031                                                 scp = &(*scp)->sc_next ) {
3032                                                 if ( (*scp)->sc_next == &cb )
3033                                                         *scp = cb.sc_next;
3034                                         }
3035                                 }
3036                         }
3037                         i = cm->db.bd_info->bi_op_search( op, rs );
3038                 }
3039                 ldap_pvt_thread_rdwr_runlock(&answerable->rwlock);
3040                 /* locked by qtemp->qcfunc (query_containment) */
3041                 ldap_pvt_thread_rdwr_runlock(&qtemp->t_rwlock);
3042                 op->o_bd = save_bd;
3043                 return i;
3044         }
3045
3046         Debug( pcache_debug, "QUERY NOT ANSWERABLE\n", 0, 0, 0 );
3047
3048         ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
3049         if (cm->num_cached_queries >= cm->max_queries) {
3050                 cacheable = 0;
3051         }
3052         ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
3053
3054         if (op->ors_attrsonly)
3055                 cacheable = 0;
3056
3057         if (cacheable) {
3058                 slap_callback           *cb;
3059                 struct search_info      *si;
3060
3061                 Debug( pcache_debug, "QUERY CACHEABLE\n", 0, 0, 0 );
3062                 query.filter = filter_dup(op->ors_filter, NULL);
3063
3064                 cb = op->o_tmpalloc( sizeof(*cb) + sizeof(*si), op->o_tmpmemctx );
3065                 cb->sc_response = pcache_response;
3066                 cb->sc_cleanup = pcache_op_cleanup;
3067                 cb->sc_private = (cb+1);
3068                 si = cb->sc_private;
3069                 si->on = on;
3070                 si->query = query;
3071                 si->qtemp = qtemp;
3072                 si->max = cm->num_entries_limit ;
3073                 si->over = 0;
3074                 si->count = 0;
3075                 si->slimit = 0;
3076                 si->slimit_exceeded = 0;
3077                 si->caching_reason = PC_IGNORE;
3078                 if ( op->ors_slimit > 0 && op->ors_slimit < cm->num_entries_limit ) {
3079                         si->slimit = op->ors_slimit;
3080                         op->ors_slimit = cm->num_entries_limit;
3081                 }
3082                 si->head = NULL;
3083                 si->tail = NULL;
3084                 si->swap_saved_attrs = 1;
3085                 si->save_attrs = op->ors_attrs;
3086                 si->pbi = pbi;
3087                 if ( pbi )
3088                         pbi->bi_si = si;
3089
3090                 op->ors_attrs = qtemp->t_attrs.attrs;
3091
3092                 if ( cm->response_cb == PCACHE_RESPONSE_CB_HEAD ) {
3093                         cb->sc_next = op->o_callback;
3094                         op->o_callback = cb;
3095
3096                 } else {
3097                         slap_callback           **pcb;
3098
3099                         /* need to move the callback at the end, in case other
3100                          * overlays are present, so that the final entry is
3101                          * actually cached */
3102                         cb->sc_next = NULL;
3103                         for ( pcb = &op->o_callback; *pcb; pcb = &(*pcb)->sc_next );
3104                         *pcb = cb;
3105                 }
3106
3107         } else {
3108                 Debug( pcache_debug, "QUERY NOT CACHEABLE\n",
3109                                         0, 0, 0);
3110         }
3111
3112         return SLAP_CB_CONTINUE;
3113 }
3114
3115 static int
3116 get_attr_set(
3117         AttributeName* attrs,
3118         query_manager* qm,
3119         int num )
3120 {
3121         int i;
3122         int count = 0;
3123
3124         if ( attrs ) {
3125                 for ( ; attrs[count].an_name.bv_val; count++ );
3126         }
3127
3128         /* recognize a single "*" or a "1.1" */
3129         if ( count == 0 ) {
3130                 count = 1;
3131                 attrs = slap_anlist_all_user_attributes;
3132
3133         } else if ( count == 1 && bvmatch( &attrs[0].an_name, slap_bv_no_attrs ) ) {
3134                 count = 0;
3135                 attrs = NULL;
3136         }
3137
3138         for ( i = 0; i < num; i++ ) {
3139                 AttributeName *a2;
3140                 int found = 1;
3141
3142                 if ( count > qm->attr_sets[i].count ) {
3143                         continue;
3144                 }
3145
3146                 if ( !count ) {
3147                         if ( !qm->attr_sets[i].count ) {
3148                                 break;
3149                         }
3150                         continue;
3151                 }
3152
3153                 for ( a2 = attrs; a2->an_name.bv_val; a2++ ) {
3154                         if ( !an_find( qm->attr_sets[i].attrs, &a2->an_name ) ) {
3155                                 found = 0;
3156                                 break;
3157                         }
3158                 }
3159
3160                 if ( found ) {
3161                         break;
3162                 }
3163         }
3164
3165         if ( i == num ) {
3166                 i = -1;
3167         }
3168
3169         return i;
3170 }
3171
3172 /* Refresh a cached query:
3173  * 1: Replay the query on the remote DB and merge each entry into
3174  * the local DB. Remember the DNs of each remote entry.
3175  * 2: Search the local DB for all entries matching this queryID.
3176  * Delete any entry whose DN is not in the list from (1).
3177  */
3178 typedef struct dnlist {
3179         struct dnlist *next;
3180         struct berval dn;
3181         char delete;
3182 } dnlist;
3183
3184 typedef struct refresh_info {
3185         dnlist *ri_dns;
3186         dnlist *ri_tail;
3187         dnlist *ri_dels;
3188         BackendDB *ri_be;
3189         CachedQuery *ri_q;
3190 } refresh_info;
3191
3192 static dnlist *dnl_alloc( Operation *op, struct berval *bvdn )
3193 {
3194         dnlist *dn = op->o_tmpalloc( sizeof(dnlist) + bvdn->bv_len + 1,
3195                         op->o_tmpmemctx );
3196         dn->dn.bv_len = bvdn->bv_len;
3197         dn->dn.bv_val = (char *)(dn+1);
3198         AC_MEMCPY( dn->dn.bv_val, bvdn->bv_val, dn->dn.bv_len );
3199         dn->dn.bv_val[dn->dn.bv_len] = '\0';
3200         return dn;
3201 }
3202
3203 static int
3204 refresh_merge( Operation *op, SlapReply *rs )
3205 {
3206         if ( rs->sr_type == REP_SEARCH ) {
3207                 refresh_info *ri = op->o_callback->sc_private;
3208                 BackendDB *be = op->o_bd;
3209                 Entry *e;
3210                 dnlist *dnl;
3211                 slap_callback *ocb;
3212                 int rc;
3213
3214                 ocb = op->o_callback;
3215                 /* Find local entry, merge */
3216                 op->o_bd = ri->ri_be;
3217                 rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e );
3218                 if ( rc != LDAP_SUCCESS || e == NULL ) {
3219                         /* No local entry, just add it. FIXME: we are not checking
3220                          * the cache entry limit here
3221                          */
3222                          merge_entry( op, rs->sr_entry, 1, &ri->ri_q->q_uuid );
3223                 } else {
3224                         /* Entry exists, update it */
3225                         Entry ne;
3226                         Attribute *a, **b;
3227                         Modifications *modlist, *mods = NULL;
3228                         const char*     text = NULL;
3229                         char                    textbuf[SLAP_TEXT_BUFLEN];
3230                         size_t                  textlen = sizeof(textbuf);
3231                         slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
3232
3233                         ne = *e;
3234                         b = &ne.e_attrs;
3235                         /* Get a copy of only the attrs we requested */
3236                         for ( a=e->e_attrs; a; a=a->a_next ) {
3237                                 if ( ad_inlist( a->a_desc, rs->sr_attrs )) {
3238                                         *b = attr_alloc( a->a_desc );
3239                                         *(*b) = *a;
3240                                         /* The actual values still belong to e */
3241                                         (*b)->a_flags |= SLAP_ATTR_DONT_FREE_VALS |
3242                                                 SLAP_ATTR_DONT_FREE_DATA;
3243                                         b = &((*b)->a_next);
3244                                 }
3245                         }
3246                         *b = NULL;
3247                         slap_entry2mods( rs->sr_entry, &modlist, &text, textbuf, textlen );
3248                         syncrepl_diff_entry( op, ne.e_attrs, rs->sr_entry->e_attrs,
3249                                 &mods, &modlist, 0 );
3250                         be_entry_release_r( op, e );
3251                         attrs_free( ne.e_attrs );
3252                         slap_mods_free( modlist, 1 );
3253                         /* mods is NULL if there are no changes */
3254                         if ( mods ) {
3255                                 struct berval dn = op->o_req_dn;
3256                                 struct berval ndn = op->o_req_ndn;
3257                                 op->o_tag = LDAP_REQ_MODIFY;
3258                                 op->orm_modlist = mods;
3259                                 op->o_req_dn = rs->sr_entry->e_name;
3260                                 op->o_req_ndn = rs->sr_entry->e_nname;
3261                                 op->o_callback = &cb;
3262                                 op->o_bd->be_modify( op, rs );
3263                                 slap_mods_free( mods, 1 );
3264                                 op->o_req_dn = dn;
3265                                 op->o_req_ndn = ndn;
3266                         }
3267                 }
3268
3269                 /* Add DN to list */
3270                 dnl = dnl_alloc( op, &rs->sr_entry->e_nname );
3271                 dnl->next = NULL;
3272                 if ( ri->ri_tail ) {
3273                         ri->ri_tail->next = dnl;
3274                 } else {
3275                         ri->ri_dns = dnl;
3276                 }
3277                 ri->ri_tail = dnl;
3278                 op->o_callback = ocb;
3279         }
3280         return 0;
3281 }
3282
3283 static int
3284 refresh_purge( Operation *op, SlapReply *rs )
3285 {
3286         if ( rs->sr_type == REP_SEARCH ) {
3287                 refresh_info *ri = op->o_callback->sc_private;
3288                 dnlist **dn;
3289                 int del = 1;
3290
3291                 /* Did the entry exist on the remote? */
3292                 for ( dn=&ri->ri_dns; *dn; dn = &(*dn)->next ) {
3293                         if ( dn_match( &(*dn)->dn, &rs->sr_entry->e_nname )) {
3294                                 dnlist *dnext = (*dn)->next;
3295                                 op->o_tmpfree( *dn, op->o_tmpmemctx );
3296                                 *dn = dnext;
3297                                 del = 0;
3298                                 break;
3299                         }
3300                 }
3301                 /* No, so put it on the list to delete */
3302                 if ( del ) {
3303                         Attribute *a;
3304                         dnlist *dnl = dnl_alloc( op, &rs->sr_entry->e_nname );
3305                         dnl->next = ri->ri_dels;
3306                         ri->ri_dels = dnl;
3307                         a = attr_find( rs->sr_entry->e_attrs, ad_queryId );
3308                         /* If ours is the only queryId, delete entry */
3309                         dnl->delete = ( a->a_numvals == 1 );
3310                 }
3311         }
3312         return 0;
3313 }
3314
3315 static int
3316 refresh_query( Operation *op, SlapReply *rs, CachedQuery *query,
3317         slap_overinst *on )
3318 {
3319         slap_callback cb = { 0 };
3320         refresh_info ri = { 0 };
3321         char filter_str[ LDAP_LUTIL_UUIDSTR_BUFSIZE + STRLENOF( "(pcacheQueryID=)" ) ];
3322         AttributeAssertion      ava = ATTRIBUTEASSERTION_INIT;
3323         Filter filter = {LDAP_FILTER_EQUALITY};
3324         AttributeName attrs[ 2 ] = {{{ 0 }}};
3325         dnlist *dn;
3326         int rc;
3327
3328         ldap_pvt_thread_mutex_lock( &query->answerable_cnt_mutex );
3329         query->refcnt = 0;
3330         ldap_pvt_thread_mutex_unlock( &query->answerable_cnt_mutex );
3331
3332         cb.sc_response = refresh_merge;
3333         cb.sc_private = &ri;
3334
3335         /* cache DB */
3336         ri.ri_be = op->o_bd;
3337         ri.ri_q = query;
3338
3339         op->o_tag = LDAP_REQ_SEARCH;
3340         op->o_protocol = LDAP_VERSION3;
3341         op->o_callback = &cb;
3342         op->o_do_not_cache = 1;
3343
3344         op->o_req_dn = query->qbase->base;
3345         op->o_req_ndn = query->qbase->base;
3346         op->ors_scope = query->scope;
3347         op->ors_slimit = SLAP_NO_LIMIT;
3348         op->ors_tlimit = SLAP_NO_LIMIT;
3349         op->ors_limit = NULL;
3350         op->ors_filter = query->filter;
3351         filter2bv_x( op, query->filter, &op->ors_filterstr );
3352         op->ors_attrs = query->qtemp->t_attrs.attrs;
3353         op->ors_attrsonly = 0;
3354
3355         op->o_bd = on->on_info->oi_origdb;
3356         rc = op->o_bd->be_search( op, rs );
3357         if ( rc ) {
3358                 op->o_bd = ri.ri_be;
3359                 goto leave;
3360         }
3361
3362         /* Get the DNs of all entries matching this query */
3363         cb.sc_response = refresh_purge;
3364
3365         op->o_bd = ri.ri_be;
3366         op->o_req_dn = op->o_bd->be_suffix[0];
3367         op->o_req_ndn = op->o_bd->be_nsuffix[0];
3368         op->ors_scope = LDAP_SCOPE_SUBTREE;
3369         op->ors_deref = LDAP_DEREF_NEVER;
3370         op->ors_filterstr.bv_len = snprintf(filter_str, sizeof(filter_str),
3371                 "(%s=%s)", ad_queryId->ad_cname.bv_val, query->q_uuid.bv_val);
3372         filter.f_ava = &ava;
3373         filter.f_av_desc = ad_queryId;
3374         filter.f_av_value = query->q_uuid;
3375         attrs[ 0 ].an_desc = ad_queryId;
3376         attrs[ 0 ].an_name = ad_queryId->ad_cname;
3377         op->ors_attrs = attrs;
3378         op->ors_attrsonly = 0;
3379         rs->sr_entry = NULL;
3380         rs->sr_nentries = 0;
3381         rc = op->o_bd->be_search( op, rs );
3382         if ( rc ) goto leave;
3383
3384         while (( dn = ri.ri_dels )) {
3385                 op->o_req_dn = dn->dn;
3386                 op->o_req_ndn = dn->dn;
3387                 if ( dn->delete ) {
3388                         op->o_tag = LDAP_REQ_DELETE;
3389                         op->o_bd->be_delete( op, rs );
3390                 } else {
3391                         Modifications mod;
3392                         struct berval vals[2];
3393
3394                         vals[0] = query->q_uuid;
3395                         BER_BVZERO( &vals[1] );
3396                         mod.sml_op = LDAP_MOD_DELETE;
3397                         mod.sml_flags = 0;
3398                         mod.sml_desc = ad_queryId;
3399                         mod.sml_type = ad_queryId->ad_cname;
3400                         mod.sml_values = vals;
3401                         mod.sml_nvalues = NULL;
3402                         mod.sml_numvals = 1;
3403                         mod.sml_next = NULL;
3404
3405                         op->o_tag = LDAP_REQ_MODIFY;
3406                         op->orm_modlist = &mod;
3407                         op->o_bd->be_modify( op, rs );
3408                 }
3409                 ri.ri_dels = dn->next;
3410                 op->o_tmpfree( dn, op->o_tmpmemctx );
3411         }
3412
3413 leave:
3414         /* reset our local heap, we're done with it */
3415         slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, op->o_threadctx, 1 );
3416         return rc;
3417 }
3418
3419 static void*
3420 consistency_check(
3421         void *ctx,
3422         void *arg )
3423 {
3424         struct re_s *rtask = arg;
3425         slap_overinst *on = rtask->arg;
3426         cache_manager *cm = on->on_bi.bi_private;
3427         query_manager *qm = cm->qm;
3428         Connection conn = {0};
3429         OperationBuffer opbuf;
3430         Operation *op;
3431
3432         SlapReply rs = {REP_RESULT};
3433         CachedQuery *query, *qprev;
3434         int return_val, pause = PCACHE_CC_PAUSED;
3435         QueryTemplate *templ;
3436
3437         /* Don't expire anything when we're offline */
3438         if ( cm->cc_paused & PCACHE_CC_OFFLINE ) {
3439                 pause = PCACHE_CC_OFFLINE;
3440                 goto leave;
3441         }
3442
3443         connection_fake_init( &conn, &opbuf, ctx );
3444         op = &opbuf.ob_op;
3445
3446         op->o_bd = &cm->db;
3447         op->o_dn = cm->db.be_rootdn;
3448         op->o_ndn = cm->db.be_rootndn;
3449
3450         cm->cc_arg = arg;
3451
3452         for (templ = qm->templates; templ; templ=templ->qmnext) {
3453                 time_t ttl;
3454                 if ( !templ->query_last ) continue;
3455                 pause = 0;
3456                 op->o_time = slap_get_time();
3457                 if ( !templ->ttr ) {
3458                         ttl = templ->ttl;
3459                         if ( templ->negttl && templ->negttl < ttl )
3460                                 ttl = templ->negttl;
3461                         if ( templ->limitttl && templ->limitttl < ttl )
3462                                 ttl = templ->limitttl;
3463                         /* The oldest timestamp that needs expiration checking */
3464                         ttl += op->o_time;
3465                 }
3466
3467                 for ( query=templ->query_last; query; query=qprev ) {
3468                         qprev = query->prev;
3469                         if ( query->refresh_time && query->refresh_time < op->o_time ) {
3470                                 /* A refresh will extend the expiry if the query has been
3471                                  * referenced, but not if it's unreferenced. If the
3472                                  * expiration has been hit, then skip the refresh since
3473                                  * we're just going to discard the result anyway.
3474                                  */
3475                                 if ( query->refcnt )
3476                                         query->expiry_time = op->o_time + templ->ttl;
3477                                 if ( query->expiry_time > op->o_time ) {
3478                                         refresh_query( op, &rs, query, on );
3479                                         continue;
3480                                 }
3481                         }
3482
3483                         if (query->expiry_time < op->o_time) {
3484                                 int rem = 0;
3485                                 Debug( pcache_debug, "Lock CR index = %p\n",
3486                                                 (void *) templ, 0, 0 );
3487                                 ldap_pvt_thread_rdwr_wlock(&templ->t_rwlock);
3488                                 if ( query == templ->query_last ) {
3489                                         rem = 1;
3490                                         remove_from_template(query, templ);
3491                                         Debug( pcache_debug, "TEMPLATE %p QUERIES-- %d\n",
3492                                                         (void *) templ, templ->no_of_queries, 0 );
3493                                         Debug( pcache_debug, "Unlock CR index = %p\n",
3494                                                         (void *) templ, 0, 0 );
3495                                 }
3496                                 ldap_pvt_thread_rdwr_wunlock(&templ->t_rwlock);
3497                                 if ( !rem ) {
3498                                         continue;
3499                                 }
3500                                 ldap_pvt_thread_mutex_lock(&qm->lru_mutex);
3501                                 remove_query(qm, query);
3502                                 ldap_pvt_thread_mutex_unlock(&qm->lru_mutex);
3503                                 if ( BER_BVISNULL( &query->q_uuid ))
3504                                         return_val = 0;
3505                                 else
3506                                         return_val = remove_query_data(op, &rs, &query->q_uuid);
3507                                 Debug( pcache_debug, "STALE QUERY REMOVED, SIZE=%d\n",
3508                                                         return_val, 0, 0 );
3509                                 ldap_pvt_thread_mutex_lock(&cm->cache_mutex);
3510                                 cm->cur_entries -= return_val;
3511                                 cm->num_cached_queries--;
3512                                 Debug( pcache_debug, "STORED QUERIES = %lu\n",
3513                                                 cm->num_cached_queries, 0, 0 );
3514                                 ldap_pvt_thread_mutex_unlock(&cm->cache_mutex);
3515                                 Debug( pcache_debug,
3516                                         "STALE QUERY REMOVED, CACHE ="
3517                                         "%d entries\n",
3518                                         cm->cur_entries, 0, 0 );
3519                                 free_query(query);
3520                         } else if ( !templ->ttr && query->expiry_time > ttl ) {
3521                                 /* We don't need to check for refreshes, and this
3522                                  * query's expiry is too new, and all subsequent queries
3523                                  * will be newer yet. So stop looking.
3524                                  *
3525                                  * If we have refreshes, then we always have to walk the
3526                                  * entire query list.
3527                                  */
3528                                 break;
3529                         }
3530                 }
3531         }
3532
3533 leave:
3534         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
3535         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
3536                 ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
3537         }
3538         /* If there were no queries, defer processing for a while */
3539         if ( cm->cc_paused != pause )
3540                 cm->cc_paused = pause;
3541         ldap_pvt_runqueue_resched( &slapd_rq, rtask, pause );
3542
3543         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
3544         return NULL;
3545 }
3546
3547
3548 #define MAX_ATTR_SETS 500
3549
3550 enum {
3551         PC_MAIN = 1,
3552         PC_ATTR,
3553         PC_TEMP,
3554         PC_RESP,
3555         PC_QUERIES,
3556         PC_OFFLINE,
3557         PC_BIND,
3558         PC_PRIVATE_DB
3559 };
3560
3561 static ConfigDriver pc_cf_gen;
3562 static ConfigLDAPadd pc_ldadd;
3563 static ConfigCfAdd pc_cfadd;
3564
3565 static ConfigTable pccfg[] = {
3566         { "pcache", "backend> <max_entries> <numattrsets> <entry limit> "
3567                                 "<cycle_time",
3568                 6, 6, 0, ARG_MAGIC|ARG_NO_DELETE|PC_MAIN, pc_cf_gen,
3569                 "( OLcfgOvAt:2.1 NAME ( 'olcPcache' 'olcProxyCache' ) "
3570                         "DESC 'Proxy Cache basic parameters' "
3571                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
3572         { "pcacheAttrset", "index> <attributes...",
3573                 2, 0, 0, ARG_MAGIC|PC_ATTR, pc_cf_gen,
3574                 "( OLcfgOvAt:2.2 NAME ( 'olcPcacheAttrset' 'olcProxyAttrset' ) "
3575                         "DESC 'A set of attributes to cache' "
3576                         "SYNTAX OMsDirectoryString )", NULL, NULL },
3577         { "pcacheTemplate", "filter> <attrset-index> <TTL> <negTTL> "
3578                         "<limitTTL> <TTR",
3579                 4, 7, 0, ARG_MAGIC|PC_TEMP, pc_cf_gen,
3580                 "( OLcfgOvAt:2.3 NAME ( 'olcPcacheTemplate' 'olcProxyCacheTemplate' ) "
3581                         "DESC 'Filter template, attrset, cache TTL, "
3582                                 "optional negative TTL, optional sizelimit TTL, "
3583                                 "optional TTR' "
3584                         "SYNTAX OMsDirectoryString )", NULL, NULL },
3585         { "pcachePosition", "head|tail(default)",
3586                 2, 2, 0, ARG_MAGIC|PC_RESP, pc_cf_gen,
3587                 "( OLcfgOvAt:2.4 NAME 'olcPcachePosition' "
3588                         "DESC 'Response callback position in overlay stack' "
3589                         "SYNTAX OMsDirectoryString )", NULL, NULL },
3590         { "pcacheMaxQueries", "queries",
3591                 2, 2, 0, ARG_INT|ARG_MAGIC|PC_QUERIES, pc_cf_gen,
3592                 "( OLcfgOvAt:2.5 NAME ( 'olcPcacheMaxQueries' 'olcProxyCacheQueries' ) "
3593                         "DESC 'Maximum number of queries to cache' "
3594                         "SYNTAX OMsInteger )", NULL, NULL },
3595         { "pcachePersist", "TRUE|FALSE",
3596                 2, 2, 0, ARG_ON_OFF|ARG_OFFSET, (void *)offsetof(cache_manager, save_queries),
3597                 "( OLcfgOvAt:2.6 NAME ( 'olcPcachePersist' 'olcProxySaveQueries' ) "
3598                         "DESC 'Save cached queries for hot restart' "
3599                         "SYNTAX OMsBoolean )", NULL, NULL },
3600         { "pcacheValidate", "TRUE|FALSE",
3601                 2, 2, 0, ARG_ON_OFF|ARG_OFFSET, (void *)offsetof(cache_manager, check_cacheability),
3602                 "( OLcfgOvAt:2.7 NAME ( 'olcPcacheValidate' 'olcProxyCheckCacheability' ) "
3603                         "DESC 'Check whether the results of a query are cacheable, e.g. for schema issues' "
3604                         "SYNTAX OMsBoolean )", NULL, NULL },
3605         { "pcacheOffline", "TRUE|FALSE",
3606                 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|PC_OFFLINE, pc_cf_gen,
3607                 "( OLcfgOvAt:2.8 NAME 'olcPcacheOffline' "
3608                         "DESC 'Set cache to offline mode and disable expiration' "
3609                         "SYNTAX OMsBoolean )", NULL, NULL },
3610         { "pcacheBind", "filter> <attrset-index> <TTR> <scope> <base",
3611                 6, 6, 0, ARG_MAGIC|PC_BIND, pc_cf_gen,
3612                 "( OLcfgOvAt:2.9 NAME 'olcPcacheBind' "
3613                         "DESC 'Parameters for caching Binds' "
3614                         "SYNTAX OMsDirectoryString )", NULL, NULL },
3615         { "pcache-", "private database args",
3616                 1, 0, STRLENOF("pcache-"), ARG_MAGIC|PC_PRIVATE_DB, pc_cf_gen,
3617                 NULL, NULL, NULL },
3618
3619         /* Legacy keywords */
3620         { "proxycache", "backend> <max_entries> <numattrsets> <entry limit> "
3621                                 "<cycle_time",
3622                 6, 6, 0, ARG_MAGIC|ARG_NO_DELETE|PC_MAIN, pc_cf_gen,
3623                 NULL, NULL, NULL },
3624         { "proxyattrset", "index> <attributes...",
3625                 2, 0, 0, ARG_MAGIC|PC_ATTR, pc_cf_gen,
3626                 NULL, NULL, NULL },
3627         { "proxytemplate", "filter> <attrset-index> <TTL> <negTTL",
3628                 4, 7, 0, ARG_MAGIC|PC_TEMP, pc_cf_gen,
3629                 NULL, NULL, NULL },
3630         { "response-callback", "head|tail(default)",
3631                 2, 2, 0, ARG_MAGIC|PC_RESP, pc_cf_gen,
3632                 NULL, NULL, NULL },
3633         { "proxyCacheQueries", "queries",
3634                 2, 2, 0, ARG_INT|ARG_MAGIC|PC_QUERIES, pc_cf_gen,
3635                 NULL, NULL, NULL },
3636         { "proxySaveQueries", "TRUE|FALSE",
3637                 2, 2, 0, ARG_ON_OFF|ARG_OFFSET, (void *)offsetof(cache_manager, save_queries),
3638                 NULL, NULL, NULL },
3639         { "proxyCheckCacheability", "TRUE|FALSE",
3640                 2, 2, 0, ARG_ON_OFF|ARG_OFFSET, (void *)offsetof(cache_manager, check_cacheability),
3641                 NULL, NULL, NULL },
3642
3643         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
3644 };
3645
3646 static ConfigOCs pcocs[] = {
3647         { "( OLcfgOvOc:2.1 "
3648                 "NAME 'olcPcacheConfig' "
3649                 "DESC 'ProxyCache configuration' "
3650                 "SUP olcOverlayConfig "
3651                 "MUST ( olcPcache $ olcPcacheAttrset $ olcPcacheTemplate ) "
3652                 "MAY ( olcPcachePosition $ olcPcacheMaxQueries $ olcPcachePersist $ "
3653                         "olcPcacheValidate $ olcPcacheOffline $ olcPcacheBind ) )",
3654                 Cft_Overlay, pccfg, NULL, pc_cfadd },
3655         { "( OLcfgOvOc:2.2 "
3656                 "NAME 'olcPcacheDatabase' "
3657                 "DESC 'Cache database configuration' "
3658                 "AUXILIARY )", Cft_Misc, olcDatabaseDummy, pc_ldadd },
3659         { NULL, 0, NULL }
3660 };
3661
3662 static int pcache_db_open2( slap_overinst *on, ConfigReply *cr );
3663
3664 static int
3665 pc_ldadd_cleanup( ConfigArgs *c )
3666 {
3667         slap_overinst *on = c->ca_private;
3668         return pcache_db_open2( on, &c->reply );
3669 }
3670
3671 static int
3672 pc_ldadd( CfEntryInfo *p, Entry *e, ConfigArgs *ca )
3673 {
3674         slap_overinst *on;
3675         cache_manager *cm;
3676
3677         if ( p->ce_type != Cft_Overlay || !p->ce_bi ||
3678                 p->ce_bi->bi_cf_ocs != pcocs )
3679                 return LDAP_CONSTRAINT_VIOLATION;
3680
3681         on = (slap_overinst *)p->ce_bi;
3682         cm = on->on_bi.bi_private;
3683         ca->be = &cm->db;
3684         /* Defer open if this is an LDAPadd */
3685         if ( CONFIG_ONLINE_ADD( ca ))
3686                 ca->cleanup = pc_ldadd_cleanup;
3687         else
3688                 cm->defer_db_open = 0;
3689         ca->ca_private = on;
3690         return LDAP_SUCCESS;
3691 }
3692
3693 static int
3694 pc_cfadd( Operation *op, SlapReply *rs, Entry *p, ConfigArgs *ca )
3695 {
3696         CfEntryInfo *pe = p->e_private;
3697         slap_overinst *on = (slap_overinst *)pe->ce_bi;
3698         cache_manager *cm = on->on_bi.bi_private;
3699         struct berval bv;
3700
3701         /* FIXME: should not hardcode "olcDatabase" here */
3702         bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
3703                 "olcDatabase=" SLAP_X_ORDERED_FMT "%s",
3704                 0, cm->db.bd_info->bi_type );
3705         if ( bv.bv_len >= sizeof( ca->cr_msg ) ) {
3706                 return -1;
3707         }
3708         bv.bv_val = ca->cr_msg;
3709         ca->be = &cm->db;
3710         cm->defer_db_open = 0;
3711
3712         /* We can only create this entry if the database is table-driven
3713          */
3714         if ( cm->db.bd_info->bi_cf_ocs )
3715                 config_build_entry( op, rs, pe, ca, &bv, cm->db.bd_info->bi_cf_ocs,
3716                         &pcocs[1] );
3717
3718         return 0;
3719 }
3720
3721 static int
3722 pc_cf_gen( ConfigArgs *c )
3723 {
3724         slap_overinst   *on = (slap_overinst *)c->bi;
3725         cache_manager*  cm = on->on_bi.bi_private;
3726         query_manager*  qm = cm->qm;
3727         QueryTemplate*  temp;
3728         AttributeName*  attr_name;
3729         AttributeName*  attrarray;
3730         const char*     text=NULL;
3731         int             i, num, rc = 0;
3732         char            *ptr;
3733         unsigned long   t;
3734
3735         if ( c->op == SLAP_CONFIG_EMIT ) {
3736                 struct berval bv;
3737                 switch( c->type ) {
3738                 case PC_MAIN:
3739                         bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s %d %d %d %ld",
3740                                 cm->db.bd_info->bi_type, cm->max_entries, cm->numattrsets,
3741                                 cm->num_entries_limit, cm->cc_period );
3742                         bv.bv_val = c->cr_msg;
3743                         value_add_one( &c->rvalue_vals, &bv );
3744                         break;
3745                 case PC_ATTR:
3746                         for (i=0; i<cm->numattrsets; i++) {
3747                                 if ( !qm->attr_sets[i].count ) continue;
3748
3749                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ), "%d", i );
3750
3751                                 /* count the attr length */
3752                                 for ( attr_name = qm->attr_sets[i].attrs;
3753                                         attr_name->an_name.bv_val; attr_name++ )
3754                                         bv.bv_len += attr_name->an_name.bv_len + 1;
3755
3756                                 bv.bv_val = ch_malloc( bv.bv_len+1 );
3757                                 ptr = lutil_strcopy( bv.bv_val, c->cr_msg );
3758                                 for ( attr_name = qm->attr_sets[i].attrs;
3759                                         attr_name->an_name.bv_val; attr_name++ ) {
3760                                         *ptr++ = ' ';
3761                                         ptr = lutil_strcopy( ptr, attr_name->an_name.bv_val );
3762                                 }
3763                                 ber_bvarray_add( &c->rvalue_vals, &bv );
3764                         }
3765                         if ( !c->rvalue_vals )
3766                                 rc = 1;
3767                         break;
3768                 case PC_TEMP:
3769                         for (temp=qm->templates; temp; temp=temp->qmnext) {
3770                                 /* HEADS-UP: always print all;
3771                                  * if optional == 0, ignore */
3772                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
3773                                         " %d %ld %ld %ld %ld",
3774                                         temp->attr_set_index,
3775                                         temp->ttl,
3776                                         temp->negttl,
3777                                         temp->limitttl,
3778                                         temp->ttr );
3779                                 bv.bv_len += temp->querystr.bv_len + 2;
3780                                 bv.bv_val = ch_malloc( bv.bv_len+1 );
3781                                 ptr = bv.bv_val;
3782                                 *ptr++ = '"';
3783                                 ptr = lutil_strcopy( ptr, temp->querystr.bv_val );
3784                                 *ptr++ = '"';
3785                                 strcpy( ptr, c->cr_msg );
3786                                 ber_bvarray_add( &c->rvalue_vals, &bv );
3787                         }
3788                         if ( !c->rvalue_vals )
3789                                 rc = 1;
3790                         break;
3791                 case PC_BIND:
3792                         for (temp=qm->templates; temp; temp=temp->qmnext) {
3793                                 if ( !temp->bindttr ) continue;
3794                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
3795                                         " %d %ld %s ",
3796                                         temp->attr_set_index,
3797                                         temp->bindttr,
3798                                         ldap_pvt_scope2str( temp->bindscope ));
3799                                 bv.bv_len += temp->bindbase.bv_len + temp->bindftemp.bv_len + 4;
3800                                 bv.bv_val = ch_malloc( bv.bv_len + 1 );
3801                                 ptr = bv.bv_val;
3802                                 *ptr++ = '"';
3803                                 ptr = lutil_strcopy( ptr, temp->bindftemp.bv_val );
3804                                 *ptr++ = '"';
3805                                 ptr = lutil_strcopy( ptr, c->cr_msg );
3806                                 *ptr++ = '"';
3807                                 ptr = lutil_strcopy( ptr, temp->bindbase.bv_val );
3808                                 *ptr++ = '"';
3809                                 *ptr = '\0';
3810                                 ber_bvarray_add( &c->rvalue_vals, &bv );
3811                         }
3812                         if ( !c->rvalue_vals )
3813                                 rc = 1;
3814                         break;
3815                 case PC_RESP:
3816                         if ( cm->response_cb == PCACHE_RESPONSE_CB_HEAD ) {
3817                                 BER_BVSTR( &bv, "head" );
3818                         } else {
3819                                 BER_BVSTR( &bv, "tail" );
3820                         }
3821                         value_add_one( &c->rvalue_vals, &bv );
3822                         break;
3823                 case PC_QUERIES:
3824                         c->value_int = cm->max_queries;
3825                         break;
3826                 case PC_OFFLINE:
3827                         c->value_int = (cm->cc_paused & PCACHE_CC_OFFLINE) != 0;
3828                         break;
3829                 }
3830                 return rc;
3831         } else if ( c->op == LDAP_MOD_DELETE ) {
3832                 rc = 1;
3833                 switch( c->type ) {
3834                 case PC_ATTR: /* FIXME */
3835                 case PC_TEMP:
3836                 case PC_BIND:
3837                         break;
3838                 case PC_OFFLINE:
3839                         cm->cc_paused &= ~PCACHE_CC_OFFLINE;
3840                         /* If there were cached queries when we went offline,
3841                          * restart the checker now.
3842                          */
3843                         if ( cm->num_cached_queries ) {
3844                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
3845                                 cm->cc_paused = 0;
3846                                 ldap_pvt_runqueue_resched( &slapd_rq, cm->cc_arg, 0 );
3847                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
3848                         }
3849                         rc = 0;
3850                         break;
3851                 }
3852                 return rc;
3853         }
3854
3855         switch( c->type ) {
3856         case PC_MAIN:
3857                 if ( cm->numattrsets > 0 ) {
3858                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "\"pcache\" directive already provided" );
3859                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3860                         return( 1 );
3861                 }
3862
3863                 if ( lutil_atoi( &cm->numattrsets, c->argv[3] ) != 0 ) {
3864                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse num attrsets=\"%s\" (arg #3)",
3865                                 c->argv[3] );
3866                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3867                         return( 1 );
3868                 }
3869                 if ( cm->numattrsets <= 0 ) {
3870                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "numattrsets (arg #3) must be positive" );
3871                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3872                         return( 1 );
3873                 }
3874                 if ( cm->numattrsets > MAX_ATTR_SETS ) {
3875                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "numattrsets (arg #3) must be <= %d", MAX_ATTR_SETS );
3876                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3877                         return( 1 );
3878                 }
3879
3880                 if ( !backend_db_init( c->argv[1], &cm->db, -1, NULL )) {
3881                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unknown backend type (arg #1)" );
3882                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3883                         return( 1 );
3884                 }
3885
3886                 if ( lutil_atoi( &cm->max_entries, c->argv[2] ) != 0 ) {
3887                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse max entries=\"%s\" (arg #2)",
3888                                 c->argv[2] );
3889                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3890                         return( 1 );
3891                 }
3892                 if ( cm->max_entries <= 0 ) {
3893                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "max entries (arg #2) must be positive.\n" );
3894                         Debug( LDAP_DEBUG_CONFIG, "%s: %s\n", c->log, c->cr_msg, 0 );
3895                         return( 1 );
3896                 }
3897
3898                 if ( lutil_atoi( &cm->num_entries_limit, c->argv[4] ) != 0 ) {
3899                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse entry limit=\"%s\" (arg #4)",
3900                                 c->argv[4] );
3901                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3902                         return( 1 );
3903                 }
3904                 if ( cm->num_entries_limit <= 0 ) {
3905                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "entry limit (arg #4) must be positive" );
3906                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3907                         return( 1 );
3908                 }
3909                 if ( cm->num_entries_limit > cm->max_entries ) {
3910                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "entry limit (arg #4) must be less than max entries %d (arg #2)", cm->max_entries );
3911                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3912                         return( 1 );
3913                 }
3914
3915                 if ( lutil_parse_time( c->argv[5], &t ) != 0 ) {
3916                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse period=\"%s\" (arg #5)",
3917                                 c->argv[5] );
3918                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3919                         return( 1 );
3920                 }
3921
3922                 cm->cc_period = (time_t)t;
3923                 Debug( pcache_debug,
3924                                 "Total # of attribute sets to be cached = %d.\n",
3925                                 cm->numattrsets, 0, 0 );
3926                 qm->attr_sets = ( struct attr_set * )ch_calloc( cm->numattrsets,
3927                                                 sizeof( struct attr_set ) );
3928                 break;
3929         case PC_ATTR:
3930                 if ( cm->numattrsets == 0 ) {
3931                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "\"pcache\" directive not provided yet" );
3932                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3933                         return( 1 );
3934                 }
3935                 if ( lutil_atoi( &num, c->argv[1] ) != 0 ) {
3936                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse attrset #=\"%s\"",
3937                                 c->argv[1] );
3938                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3939                         return( 1 );
3940                 }
3941
3942                 if ( num < 0 || num >= cm->numattrsets ) {
3943                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "attrset index %d out of bounds (must be %s%d)",
3944                                 num, cm->numattrsets > 1 ? "0->" : "", cm->numattrsets - 1 );
3945                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3946                         return 1;
3947                 }
3948                 qm->attr_sets[num].flags |= PC_CONFIGURED;
3949                 if ( c->argc == 2 ) {
3950                         /* assume "1.1" */
3951                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
3952                                 "need an explicit attr in attrlist; use \"*\" to indicate all attrs" );
3953                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
3954                         return 1;
3955
3956                 } else if ( c->argc == 3 ) {
3957                         if ( strcmp( c->argv[2], LDAP_ALL_USER_ATTRIBUTES ) == 0 ) {
3958                                 qm->attr_sets[num].count = 1;
3959                                 qm->attr_sets[num].attrs = (AttributeName*)ch_calloc( 2,
3960                                         sizeof( AttributeName ) );
3961                                 BER_BVSTR( &qm->attr_sets[num].attrs[0].an_name, LDAP_ALL_USER_ATTRIBUTES );
3962                                 break;
3963
3964                         } else if ( strcmp( c->argv[2], LDAP_ALL_OPERATIONAL_ATTRIBUTES ) == 0 ) {
3965                                 qm->attr_sets[num].count = 1;
3966                                 qm->attr_sets[num].attrs = (AttributeName*)ch_calloc( 2,
3967                                         sizeof( AttributeName ) );
3968                                 BER_BVSTR( &qm->attr_sets[num].attrs[0].an_name, LDAP_ALL_OPERATIONAL_ATTRIBUTES );
3969                                 break;
3970
3971                         } else if ( strcmp( c->argv[2], LDAP_NO_ATTRS ) == 0 ) {
3972                                 break;
3973                         }
3974                         /* else: fallthru */
3975
3976                 } else if ( c->argc == 4 ) {
3977                         if ( ( strcmp( c->argv[2], LDAP_ALL_USER_ATTRIBUTES ) == 0 && strcmp( c->argv[3], LDAP_ALL_OPERATIONAL_ATTRIBUTES ) == 0 )
3978                                 || ( strcmp( c->argv[2], LDAP_ALL_OPERATIONAL_ATTRIBUTES ) == 0 && strcmp( c->argv[3], LDAP_ALL_USER_ATTRIBUTES ) == 0 ) )
3979                         {
3980                                 qm->attr_sets[num].count = 2;
3981                                 qm->attr_sets[num].attrs = (AttributeName*)ch_calloc( 3,
3982                                         sizeof( AttributeName ) );
3983                                 BER_BVSTR( &qm->attr_sets[num].attrs[0].an_name, LDAP_ALL_USER_ATTRIBUTES );
3984                                 BER_BVSTR( &qm->attr_sets[num].attrs[1].an_name, LDAP_ALL_OPERATIONAL_ATTRIBUTES );
3985                                 break;
3986                         }
3987                         /* else: fallthru */
3988                 }
3989
3990                 if ( c->argc > 2 ) {
3991                         int all_user = 0, all_op = 0;
3992
3993                         qm->attr_sets[num].count = c->argc - 2;
3994                         qm->attr_sets[num].attrs = (AttributeName*)ch_calloc( c->argc - 1,
3995                                 sizeof( AttributeName ) );
3996                         attr_name = qm->attr_sets[num].attrs;
3997                         for ( i = 2; i < c->argc; i++ ) {
3998                                 attr_name->an_desc = NULL;
3999                                 if ( strcmp( c->argv[i], LDAP_NO_ATTRS ) == 0 ) {
4000                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4001                                                 "invalid attr #%d \"%s\" in attrlist",
4002                                                 i - 2, c->argv[i] );
4003                                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4004                                         ch_free( qm->attr_sets[num].attrs );
4005                                         qm->attr_sets[num].attrs = NULL;
4006                                         qm->attr_sets[num].count = 0;
4007                                         return 1;
4008                                 }
4009                                 if ( strcmp( c->argv[i], LDAP_ALL_USER_ATTRIBUTES ) == 0 ) {
4010                                         all_user = 1;
4011                                         BER_BVSTR( &attr_name->an_name, LDAP_ALL_USER_ATTRIBUTES );
4012                                 } else if ( strcmp( c->argv[i], LDAP_ALL_OPERATIONAL_ATTRIBUTES ) == 0 ) {
4013                                         all_op = 1;
4014                                         BER_BVSTR( &attr_name->an_name, LDAP_ALL_OPERATIONAL_ATTRIBUTES );
4015                                 } else {
4016                                         if ( slap_str2ad( c->argv[i], &attr_name->an_desc, &text ) ) {
4017                                                 strcpy( c->cr_msg, text );
4018                                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4019                                                 ch_free( qm->attr_sets[num].attrs );
4020                                                 qm->attr_sets[num].attrs = NULL;
4021                                                 qm->attr_sets[num].count = 0;
4022                                                 return 1;
4023                                         }
4024                                         attr_name->an_name = attr_name->an_desc->ad_cname;
4025                                 }
4026                                 attr_name->an_oc = NULL;
4027                                 attr_name->an_flags = 0;
4028                                 if ( attr_name->an_desc == slap_schema.si_ad_objectClass )
4029                                         qm->attr_sets[num].flags |= PC_GOT_OC;
4030                                 attr_name++;
4031                                 BER_BVZERO( &attr_name->an_name );
4032                         }
4033
4034                         /* warn if list contains both "*" and "+" */
4035                         if ( i > 4 && all_user && all_op ) {
4036                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4037                                         "warning: attribute list contains \"*\" and \"+\"" );
4038                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4039                         }
4040                 }
4041                 break;
4042         case PC_TEMP:
4043                 if ( cm->numattrsets == 0 ) {
4044                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "\"pcache\" directive not provided yet" );
4045                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4046                         return( 1 );
4047                 }
4048                 if ( lutil_atoi( &i, c->argv[2] ) != 0 ) {
4049                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse template #=\"%s\"",
4050                                 c->argv[2] );
4051                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4052                         return( 1 );
4053                 }
4054
4055                 if ( i < 0 || i >= cm->numattrsets ||
4056                         !(qm->attr_sets[i].flags & PC_CONFIGURED )) {
4057                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "template index %d invalid (%s%d)",
4058                                 i, cm->numattrsets > 1 ? "0->" : "", cm->numattrsets - 1 );
4059                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4060                         return 1;
4061                 }
4062                 {
4063                         AttributeName *attrs;
4064                         int cnt;
4065                         cnt = template_attrs( c->argv[1], &qm->attr_sets[i], &attrs, &text );
4066                         if ( cnt < 0 ) {
4067                                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse template: %s",
4068                                         text );
4069                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4070                                 return 1;
4071                         }
4072                         temp = ch_calloc( 1, sizeof( QueryTemplate ));
4073                         temp->qmnext = qm->templates;
4074                         qm->templates = temp;
4075                         temp->t_attrs.attrs = attrs;
4076                         temp->t_attrs.count = cnt;
4077                 }
4078                 ldap_pvt_thread_rdwr_init( &temp->t_rwlock );
4079                 temp->query = temp->query_last = NULL;
4080                 if ( lutil_parse_time( c->argv[3], &t ) != 0 ) {
4081                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4082                                 "unable to parse template ttl=\"%s\"",
4083                                 c->argv[3] );
4084                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4085 pc_temp_fail:
4086                         ch_free( temp->t_attrs.attrs );
4087                         ch_free( temp );
4088                         return( 1 );
4089                 }
4090                 temp->ttl = (time_t)t;
4091                 temp->negttl = (time_t)0;
4092                 temp->limitttl = (time_t)0;
4093                 temp->ttr = (time_t)0;
4094                 switch ( c->argc ) {
4095                 case 7:
4096                         if ( lutil_parse_time( c->argv[6], &t ) != 0 ) {
4097                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4098                                         "unable to parse template ttr=\"%s\"",
4099                                         c->argv[6] );
4100                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4101                                 goto pc_temp_fail;
4102                         }
4103                         temp->ttr = (time_t)t;
4104                         /* fallthru */
4105
4106                 case 6:
4107                         if ( lutil_parse_time( c->argv[5], &t ) != 0 ) {
4108                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4109                                         "unable to parse template sizelimit ttl=\"%s\"",
4110                                         c->argv[5] );
4111                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4112                                 goto pc_temp_fail;
4113                         }
4114                         temp->limitttl = (time_t)t;
4115                         /* fallthru */
4116
4117                 case 5:
4118                         if ( lutil_parse_time( c->argv[4], &t ) != 0 ) {
4119                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4120                                         "unable to parse template negative ttl=\"%s\"",
4121                                         c->argv[4] );
4122                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4123                                 goto pc_temp_fail;
4124                         }
4125                         temp->negttl = (time_t)t;
4126                         break;
4127                 }
4128
4129                 temp->no_of_queries = 0;
4130
4131                 ber_str2bv( c->argv[1], 0, 1, &temp->querystr );
4132                 Debug( pcache_debug, "Template:\n", 0, 0, 0 );
4133                 Debug( pcache_debug, "  query template: %s\n",
4134                                 temp->querystr.bv_val, 0, 0 );
4135                 temp->attr_set_index = i;
4136                 qm->attr_sets[i].flags |= PC_REFERENCED;
4137                 temp->qtnext = qm->attr_sets[i].templates;
4138                 qm->attr_sets[i].templates = temp;
4139                 Debug( pcache_debug, "  attributes: \n", 0, 0, 0 );
4140                 if ( ( attrarray = qm->attr_sets[i].attrs ) != NULL ) {
4141                         for ( i=0; attrarray[i].an_name.bv_val; i++ )
4142                                 Debug( pcache_debug, "\t%s\n",
4143                                         attrarray[i].an_name.bv_val, 0, 0 );
4144                 }
4145                 break;
4146         case PC_BIND:
4147                 if ( !qm->templates ) {
4148                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "\"pcacheTemplate\" directive not provided yet" );
4149                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4150                         return( 1 );
4151                 }
4152                 if ( lutil_atoi( &i, c->argv[2] ) != 0 ) {
4153                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse Bind index #=\"%s\"",
4154                                 c->argv[2] );
4155                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4156                         return( 1 );
4157                 }
4158
4159                 if ( i < 0 || i >= cm->numattrsets ||
4160                         !(qm->attr_sets[i].flags & PC_CONFIGURED )) {
4161                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "Bind index %d invalid (%s%d)",
4162                                 i, cm->numattrsets > 1 ? "0->" : "", cm->numattrsets - 1 );
4163                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4164                         return 1;
4165                 }
4166                 {       struct berval bv, tempbv;
4167                         AttributeDescription **descs;
4168                         int ndescs;
4169                         ber_str2bv( c->argv[1], 0, 0, &bv );
4170                         ndescs = ftemp_attrs( &bv, &tempbv, &descs, &text );
4171                         if ( ndescs < 0 ) {
4172                                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "unable to parse template: %s",
4173                                         text );
4174                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4175                                 return 1;
4176                         }
4177                         for ( temp = qm->templates; temp; temp=temp->qmnext ) {
4178                                 if ( temp->attr_set_index == i && bvmatch( &tempbv,
4179                                         &temp->querystr ))
4180                                         break;
4181                         }
4182                         ch_free( tempbv.bv_val );
4183                         if ( !temp ) {
4184                                 ch_free( descs );
4185                                 snprintf( c->cr_msg, sizeof( c->cr_msg ), "Bind template %s %d invalid",
4186                                         c->argv[1], i );
4187                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4188                                 return 1;
4189                         }
4190                         ber_dupbv( &temp->bindftemp, &bv );
4191                         temp->bindfattrs = descs;
4192                         temp->bindnattrs = ndescs;
4193                 }
4194                 if ( lutil_parse_time( c->argv[3], &t ) != 0 ) {
4195                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4196                                 "unable to parse bind ttr=\"%s\"",
4197                                 c->argv[3] );
4198                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4199 pc_bind_fail:
4200                         ch_free( temp->bindfattrs );
4201                         temp->bindfattrs = NULL;
4202                         ch_free( temp->bindftemp.bv_val );
4203                         BER_BVZERO( &temp->bindftemp );
4204                         return( 1 );
4205                 }
4206                 num = ldap_pvt_str2scope( c->argv[4] );
4207                 if ( num < 0 ) {
4208                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4209                                 "unable to parse bind scope=\"%s\"",
4210                                 c->argv[4] );
4211                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4212                         goto pc_bind_fail;
4213                 }
4214                 {
4215                         struct berval dn, ndn;
4216                         ber_str2bv( c->argv[5], 0, 0, &dn );
4217                         rc = dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL );
4218                         if ( rc ) {
4219                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4220                                         "invalid bind baseDN=\"%s\"",
4221                                         c->argv[5] );
4222                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4223                                 goto pc_bind_fail;
4224                         }
4225                         if ( temp->bindbase.bv_val )
4226                                 ch_free( temp->bindbase.bv_val );
4227                         temp->bindbase = ndn;
4228                 }
4229                 {
4230                         /* convert the template into dummy filter */
4231                         struct berval bv;
4232                         char *eq = temp->bindftemp.bv_val, *e2;
4233                         Filter *f;
4234                         i = 0;
4235                         while ((eq = strchr(eq, '=' ))) {
4236                                 eq++;
4237                                 if ( eq[1] == ')' )
4238                                         i++;
4239                         }
4240                         bv.bv_len = temp->bindftemp.bv_len + i;
4241                         bv.bv_val = ch_malloc( bv.bv_len + 1 );
4242                         for ( e2 = bv.bv_val, eq = temp->bindftemp.bv_val;
4243                                 *eq; eq++ ) {
4244                                 if ( *eq == '=' ) {
4245                                         *e2++ = '=';
4246                                         if ( eq[1] == ')' )
4247                                                 *e2++ = '*';
4248                                 } else {
4249                                         *e2++ = *eq;
4250                                 }
4251                         }
4252                         *e2 = '\0';
4253                         f = str2filter( bv.bv_val );
4254                         if ( !f ) {
4255                                 ch_free( bv.bv_val );
4256                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4257                                         "unable to parse bindfilter=\"%s\"", bv.bv_val );
4258                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4259                                 ch_free( temp->bindbase.bv_val );
4260                                 BER_BVZERO( &temp->bindbase );
4261                                 goto pc_bind_fail;
4262                         }
4263                         if ( temp->bindfilter )
4264                                 filter_free( temp->bindfilter );
4265                         if ( temp->bindfilterstr.bv_val )
4266                                 ch_free( temp->bindfilterstr.bv_val );
4267                         temp->bindfilterstr = bv;
4268                         temp->bindfilter = f;
4269                 }
4270                 temp->bindttr = (time_t)t;
4271                 temp->bindscope = num;
4272                 cm->cache_binds = 1;
4273                 break;
4274
4275         case PC_RESP:
4276                 if ( strcasecmp( c->argv[1], "head" ) == 0 ) {
4277                         cm->response_cb = PCACHE_RESPONSE_CB_HEAD;
4278
4279                 } else if ( strcasecmp( c->argv[1], "tail" ) == 0 ) {
4280                         cm->response_cb = PCACHE_RESPONSE_CB_TAIL;
4281
4282                 } else {
4283                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "unknown specifier" );
4284                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4285                         return 1;
4286                 }
4287                 break;
4288         case PC_QUERIES:
4289                 if ( c->value_int <= 0 ) {
4290                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "max queries must be positive" );
4291                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4292                         return( 1 );
4293                 }
4294                 cm->max_queries = c->value_int;
4295                 break;
4296         case PC_OFFLINE:
4297                 if ( c->value_int )
4298                         cm->cc_paused |= PCACHE_CC_OFFLINE;
4299                 else
4300                         cm->cc_paused &= ~PCACHE_CC_OFFLINE;
4301                 break;
4302         case PC_PRIVATE_DB:
4303                 if ( cm->db.be_private == NULL ) {
4304                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4305                                 "private database must be defined before setting database specific options" );
4306                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4307                         return( 1 );
4308                 }
4309
4310                 if ( cm->db.bd_info->bi_cf_ocs ) {
4311                         ConfigTable     *ct;
4312                         ConfigArgs      c2 = *c;
4313                         char            *argv0 = c->argv[ 0 ];
4314
4315                         c->argv[ 0 ] = &argv0[ STRLENOF( "pcache-" ) ];
4316
4317                         ct = config_find_keyword( cm->db.bd_info->bi_cf_ocs->co_table, c );
4318                         if ( ct == NULL ) {
4319                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
4320                                         "private database does not recognize specific option '%s'",
4321                                         c->argv[ 0 ] );
4322                                 Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4323                                 rc = 1;
4324
4325                         } else {
4326                                 c->table = cm->db.bd_info->bi_cf_ocs->co_type;
4327                                 c->be = &cm->db;
4328                                 c->bi = c->be->bd_info;
4329
4330                                 rc = config_add_vals( ct, c );
4331
4332                                 c->bi = c2.bi;
4333                                 c->be = c2.be;
4334                                 c->table = c2.table;
4335                         }
4336
4337                         c->argv[ 0 ] = argv0;
4338
4339                 } else if ( cm->db.be_config != NULL ) {
4340                         char    *argv0 = c->argv[ 0 ];
4341
4342                         c->argv[ 0 ] = &argv0[ STRLENOF( "pcache-" ) ];
4343                         rc = cm->db.be_config( &cm->db, c->fname, c->lineno, c->argc, c->argv );
4344                         c->argv[ 0 ] = argv0;
4345
4346                 } else {
4347                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
4348                                 "no means to set private database specific options" );
4349                         Debug( LDAP_DEBUG_CONFIG, "%s: %s.\n", c->log, c->cr_msg, 0 );
4350                         return 1;
4351                 }
4352                 break;
4353         default:
4354                 rc = SLAP_CONF_UNKNOWN;
4355                 break;
4356         }
4357
4358         return rc;
4359 }
4360
4361 static int
4362 pcache_db_config(
4363         BackendDB       *be,
4364         const char      *fname,
4365         int             lineno,
4366         int             argc,
4367         char            **argv
4368 )
4369 {
4370         slap_overinst   *on = (slap_overinst *)be->bd_info;
4371         cache_manager*  cm = on->on_bi.bi_private;
4372
4373         /* Something for the cache database? */
4374         if ( cm->db.bd_info && cm->db.bd_info->bi_db_config )
4375                 return cm->db.bd_info->bi_db_config( &cm->db, fname, lineno,
4376                         argc, argv );
4377         return SLAP_CONF_UNKNOWN;
4378 }
4379
4380 static int
4381 pcache_db_init(
4382         BackendDB *be,
4383         ConfigReply *cr)
4384 {
4385         slap_overinst *on = (slap_overinst *)be->bd_info;
4386         cache_manager *cm;
4387         query_manager *qm;
4388
4389         cm = (cache_manager *)ch_malloc(sizeof(cache_manager));
4390         on->on_bi.bi_private = cm;
4391
4392         qm = (query_manager*)ch_malloc(sizeof(query_manager));
4393
4394         cm->db = *be;
4395         SLAP_DBFLAGS(&cm->db) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
4396         cm->db.be_private = NULL;
4397         cm->db.bd_self = &cm->db;
4398         cm->qm = qm;
4399         cm->numattrsets = 0;
4400         cm->num_entries_limit = 5;
4401         cm->num_cached_queries = 0;
4402         cm->max_entries = 0;
4403         cm->cur_entries = 0;
4404         cm->max_queries = 10000;
4405         cm->save_queries = 0;
4406         cm->check_cacheability = 0;
4407         cm->response_cb = PCACHE_RESPONSE_CB_TAIL;
4408         cm->defer_db_open = 1;
4409         cm->cache_binds = 0;
4410         cm->cc_period = 1000;
4411         cm->cc_paused = 0;
4412         cm->cc_arg = NULL;
4413 #ifdef PCACHE_MONITOR
4414         cm->monitor_cb = NULL;
4415 #endif /* PCACHE_MONITOR */
4416
4417         qm->attr_sets = NULL;
4418         qm->templates = NULL;
4419         qm->lru_top = NULL;
4420         qm->lru_bottom = NULL;
4421
4422         qm->qcfunc = query_containment;
4423         qm->crfunc = cache_replacement;
4424         qm->addfunc = add_query;
4425         ldap_pvt_thread_mutex_init(&qm->lru_mutex);
4426
4427         ldap_pvt_thread_mutex_init(&cm->cache_mutex);
4428
4429 #ifndef PCACHE_MONITOR
4430         return 0;
4431 #else /* PCACHE_MONITOR */
4432         return pcache_monitor_db_init( be );
4433 #endif /* PCACHE_MONITOR */
4434 }
4435
4436 static int
4437 pcache_cachedquery_open_cb( Operation *op, SlapReply *rs )
4438 {
4439         assert( op->o_tag == LDAP_REQ_SEARCH );
4440
4441         if ( rs->sr_type == REP_SEARCH ) {
4442                 Attribute       *a;
4443
4444                 a = attr_find( rs->sr_entry->e_attrs, ad_cachedQueryURL );
4445                 if ( a != NULL ) {
4446                         BerVarray       *valsp;
4447
4448                         assert( a->a_nvals != NULL );
4449
4450                         valsp = op->o_callback->sc_private;
4451                         assert( *valsp == NULL );
4452
4453                         ber_bvarray_dup_x( valsp, a->a_nvals, op->o_tmpmemctx );
4454                 }
4455         }
4456
4457         return 0;
4458 }
4459
4460 static int
4461 pcache_cachedquery_count_cb( Operation *op, SlapReply *rs )
4462 {
4463         assert( op->o_tag == LDAP_REQ_SEARCH );
4464
4465         if ( rs->sr_type == REP_SEARCH ) {
4466                 int     *countp = (int *)op->o_callback->sc_private;
4467
4468                 (*countp)++;
4469         }
4470
4471         return 0;
4472 }
4473
4474 static int
4475 pcache_db_open2(
4476         slap_overinst *on,
4477         ConfigReply *cr )
4478 {
4479         cache_manager   *cm = on->on_bi.bi_private;
4480         query_manager*  qm = cm->qm;
4481         int rc;
4482
4483         rc = backend_startup_one( &cm->db, cr );
4484         if ( rc == 0 ) {
4485                 cm->defer_db_open = 0;
4486         }
4487
4488         /* There is no runqueue in TOOL mode */
4489         if (( slapMode & SLAP_SERVER_MODE ) && rc == 0 ) {
4490                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
4491                 ldap_pvt_runqueue_insert( &slapd_rq, cm->cc_period,
4492                         consistency_check, on,
4493                         "pcache_consistency", cm->db.be_suffix[0].bv_val );
4494                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
4495
4496                 /* Cached database must have the rootdn */
4497                 if ( BER_BVISNULL( &cm->db.be_rootndn )
4498                                 || BER_BVISEMPTY( &cm->db.be_rootndn ) )
4499                 {
4500                         Debug( LDAP_DEBUG_ANY, "pcache_db_open(): "
4501                                 "underlying database of type \"%s\"\n"
4502                                 "    serving naming context \"%s\"\n"
4503                                 "    has no \"rootdn\", required by \"pcache\".\n",
4504                                 on->on_info->oi_orig->bi_type,
4505                                 cm->db.be_suffix[0].bv_val, 0 );
4506                         return 1;
4507                 }
4508
4509                 if ( cm->save_queries ) {
4510                         void            *thrctx = ldap_pvt_thread_pool_context();
4511                         Connection      conn = { 0 };
4512                         OperationBuffer opbuf;
4513                         Operation       *op;
4514                         slap_callback   cb = { 0 };
4515                         SlapReply       rs = { 0 };
4516                         BerVarray       vals = NULL;
4517                         Filter          f = { 0 }, f2 = { 0 };
4518                         AttributeAssertion      ava = ATTRIBUTEASSERTION_INIT;
4519                         AttributeName   attrs[ 2 ] = {{{ 0 }}};
4520
4521                         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
4522                         op = &opbuf.ob_op;
4523
4524                         op->o_bd = &cm->db;
4525
4526                         op->o_tag = LDAP_REQ_SEARCH;
4527                         op->o_protocol = LDAP_VERSION3;
4528                         cb.sc_response = pcache_cachedquery_open_cb;
4529                         cb.sc_private = &vals;
4530                         op->o_callback = &cb;
4531                         op->o_time = slap_get_time();
4532                         op->o_do_not_cache = 1;
4533                         op->o_managedsait = SLAP_CONTROL_CRITICAL;
4534
4535                         op->o_dn = cm->db.be_rootdn;
4536                         op->o_ndn = cm->db.be_rootndn;
4537                         op->o_req_dn = cm->db.be_suffix[ 0 ];
4538                         op->o_req_ndn = cm->db.be_nsuffix[ 0 ];
4539
4540                         op->ors_scope = LDAP_SCOPE_BASE;
4541                         op->ors_deref = LDAP_DEREF_NEVER;
4542                         op->ors_slimit = 1;
4543                         op->ors_tlimit = SLAP_NO_LIMIT;
4544                         op->ors_limit = NULL;
4545                         ber_str2bv( "(pcacheQueryURL=*)", 0, 0, &op->ors_filterstr );
4546                         f.f_choice = LDAP_FILTER_PRESENT;
4547                         f.f_desc = ad_cachedQueryURL;
4548                         op->ors_filter = &f;
4549                         attrs[ 0 ].an_desc = ad_cachedQueryURL;
4550                         attrs[ 0 ].an_name = ad_cachedQueryURL->ad_cname;
4551                         op->ors_attrs = attrs;
4552                         op->ors_attrsonly = 0;
4553
4554                         rc = op->o_bd->be_search( op, &rs );
4555                         if ( rc == LDAP_SUCCESS && vals != NULL ) {
4556                                 int     i;
4557
4558                                 for ( i = 0; !BER_BVISNULL( &vals[ i ] ); i++ ) {
4559                                         if ( url2query( vals[ i ].bv_val, op, qm ) == 0 ) {
4560                                                 cm->num_cached_queries++;
4561                                         }
4562                                 }
4563
4564                                 ber_bvarray_free_x( vals, op->o_tmpmemctx );
4565                         }
4566
4567                         /* count cached entries */
4568                         f.f_choice = LDAP_FILTER_NOT;
4569                         f.f_not = &f2;
4570                         f2.f_choice = LDAP_FILTER_EQUALITY;
4571                         f2.f_ava = &ava;
4572                         f2.f_av_desc = slap_schema.si_ad_objectClass;
4573                         BER_BVSTR( &f2.f_av_value, "glue" );
4574                         ber_str2bv( "(!(objectClass=glue))", 0, 0, &op->ors_filterstr );
4575
4576                         op->ors_slimit = SLAP_NO_LIMIT;
4577                         op->ors_scope = LDAP_SCOPE_SUBTREE;
4578                         op->ors_attrs = slap_anlist_no_attrs;
4579
4580                         op->o_callback->sc_response = pcache_cachedquery_count_cb;
4581                         rs.sr_nentries = 0;
4582                         op->o_callback->sc_private = &rs.sr_nentries;
4583
4584                         rc = op->o_bd->be_search( op, &rs );
4585
4586                         cm->cur_entries = rs.sr_nentries;
4587
4588                         /* ignore errors */
4589                         rc = 0;
4590                 }
4591         }
4592         return rc;
4593 }
4594
4595 static int
4596 pcache_db_open(
4597         BackendDB *be,
4598         ConfigReply *cr )
4599 {
4600         slap_overinst   *on = (slap_overinst *)be->bd_info;
4601         cache_manager   *cm = on->on_bi.bi_private;
4602         query_manager*  qm = cm->qm;
4603         int             i, ncf = 0, rf = 0, nrf = 0, rc = 0;
4604
4605         /* check attr sets */
4606         for ( i = 0; i < cm->numattrsets; i++) {
4607                 if ( !( qm->attr_sets[i].flags & PC_CONFIGURED ) ) {
4608                         if ( qm->attr_sets[i].flags & PC_REFERENCED ) {
4609                                 Debug( LDAP_DEBUG_CONFIG, "pcache: attr set #%d not configured but referenced.\n", i, 0, 0 );
4610                                 rf++;
4611
4612                         } else {
4613                                 Debug( LDAP_DEBUG_CONFIG, "pcache: warning, attr set #%d not configured.\n", i, 0, 0 );
4614                         }
4615                         ncf++;
4616
4617                 } else if ( !( qm->attr_sets[i].flags & PC_REFERENCED ) ) {
4618                         Debug( LDAP_DEBUG_CONFIG, "pcache: attr set #%d configured but not referenced.\n", i, 0, 0 );
4619                         nrf++;
4620                 }
4621         }
4622
4623         if ( ncf || rf || nrf ) {
4624                 Debug( LDAP_DEBUG_CONFIG, "pcache: warning, %d attr sets configured but not referenced.\n", nrf, 0, 0 );
4625                 Debug( LDAP_DEBUG_CONFIG, "pcache: warning, %d attr sets not configured.\n", ncf, 0, 0 );
4626                 Debug( LDAP_DEBUG_CONFIG, "pcache: %d attr sets not configured but referenced.\n", rf, 0, 0 );
4627
4628                 if ( rf > 0 ) {
4629                         return 1;
4630                 }
4631         }
4632
4633         /* need to inherit something from the original database... */
4634         cm->db.be_def_limit = be->be_def_limit;
4635         cm->db.be_limits = be->be_limits;
4636         cm->db.be_acl = be->be_acl;
4637         cm->db.be_dfltaccess = be->be_dfltaccess;
4638
4639         if ( SLAP_DBMONITORING( be ) ) {
4640                 SLAP_DBFLAGS( &cm->db ) |= SLAP_DBFLAG_MONITORING;
4641
4642         } else {
4643                 SLAP_DBFLAGS( &cm->db ) &= ~SLAP_DBFLAG_MONITORING;
4644         }
4645
4646         if ( !cm->defer_db_open ) {
4647                 rc = pcache_db_open2( on, cr );
4648         }
4649
4650 #ifdef PCACHE_MONITOR
4651         if ( rc == LDAP_SUCCESS ) {
4652                 rc = pcache_monitor_db_open( be );
4653         }
4654 #endif /* PCACHE_MONITOR */
4655
4656         return rc;
4657 }
4658
4659 static void
4660 pcache_free_qbase( void *v )
4661 {
4662         Qbase *qb = v;
4663         int i;
4664
4665         for (i=0; i<3; i++)
4666                 tavl_free( qb->scopes[i], NULL );
4667         ch_free( qb );
4668 }
4669
4670 static int
4671 pcache_db_close(
4672         BackendDB *be,
4673         ConfigReply *cr
4674 )
4675 {
4676         slap_overinst *on = (slap_overinst *)be->bd_info;
4677         cache_manager *cm = on->on_bi.bi_private;
4678         query_manager *qm = cm->qm;
4679         QueryTemplate *tm;
4680         int i, rc = 0;
4681
4682         /* stop the thread ... */
4683         if ( cm->cc_arg ) {
4684                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
4685                 if ( ldap_pvt_runqueue_isrunning( &slapd_rq, cm->cc_arg ) ) {
4686                         ldap_pvt_runqueue_stoptask( &slapd_rq, cm->cc_arg );
4687                 }
4688                 ldap_pvt_runqueue_remove( &slapd_rq, cm->cc_arg );
4689                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
4690         }
4691
4692         if ( cm->save_queries ) {
4693                 CachedQuery     *qc;
4694                 BerVarray       vals = NULL;
4695
4696                 void            *thrctx;
4697                 Connection      conn = { 0 };
4698                 OperationBuffer opbuf;
4699                 Operation       *op;
4700                 slap_callback   cb = { 0 };
4701
4702                 SlapReply       rs = { REP_RESULT };
4703                 Modifications   mod = {{ 0 }};
4704
4705                 thrctx = ldap_pvt_thread_pool_context();
4706
4707                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
4708                 op = &opbuf.ob_op;
4709
4710                 if ( qm->templates != NULL ) {
4711                         for ( tm = qm->templates; tm != NULL; tm = tm->qmnext ) {
4712                                 for ( qc = tm->query; qc; qc = qc->next ) {
4713                                         struct berval   bv;
4714
4715                                         if ( query2url( op, qc, &bv, 0 ) == 0 ) {
4716                                                 ber_bvarray_add_x( &vals, &bv, op->o_tmpmemctx );
4717                                         }
4718                                 }
4719                         }
4720                 }
4721
4722                 op->o_bd = &cm->db;
4723                 op->o_dn = cm->db.be_rootdn;
4724                 op->o_ndn = cm->db.be_rootndn;
4725
4726                 op->o_tag = LDAP_REQ_MODIFY;
4727                 op->o_protocol = LDAP_VERSION3;
4728                 cb.sc_response = slap_null_cb;
4729                 op->o_callback = &cb;
4730                 op->o_time = slap_get_time();
4731                 op->o_do_not_cache = 1;
4732                 op->o_managedsait = SLAP_CONTROL_CRITICAL;
4733
4734                 op->o_req_dn = op->o_bd->be_suffix[0];
4735                 op->o_req_ndn = op->o_bd->be_nsuffix[0];
4736
4737                 mod.sml_op = LDAP_MOD_REPLACE;
4738                 mod.sml_flags = 0;
4739                 mod.sml_desc = ad_cachedQueryURL;
4740                 mod.sml_type = ad_cachedQueryURL->ad_cname;
4741                 mod.sml_values = vals;
4742                 mod.sml_nvalues = NULL;
4743                 mod.sml_numvals = 1;
4744                 mod.sml_next = NULL;
4745                 Debug( pcache_debug,
4746                         "%sSETTING CACHED QUERY URLS\n",
4747                         vals == NULL ? "RE" : "", 0, 0 );
4748
4749                 op->orm_modlist = &mod;
4750
4751                 op->o_bd->be_modify( op, &rs );
4752
4753                 ber_bvarray_free_x( vals, op->o_tmpmemctx );
4754         }
4755
4756         /* cleanup stuff inherited from the original database... */
4757         cm->db.be_limits = NULL;
4758         cm->db.be_acl = NULL;
4759
4760
4761         if ( cm->db.bd_info->bi_db_close ) {
4762                 rc = cm->db.bd_info->bi_db_close( &cm->db, NULL );
4763         }
4764         while ( (tm = qm->templates) != NULL ) {
4765                 CachedQuery *qc, *qn;
4766                 qm->templates = tm->qmnext;
4767                 for ( qc = tm->query; qc; qc = qn ) {
4768                         qn = qc->next;
4769                         free_query( qc );
4770                 }
4771                 avl_free( tm->qbase, pcache_free_qbase );
4772                 free( tm->querystr.bv_val );
4773                 free( tm->bindfattrs );
4774                 free( tm->bindftemp.bv_val );
4775                 free( tm->bindfilterstr.bv_val );
4776                 free( tm->bindbase.bv_val );
4777                 filter_free( tm->bindfilter );
4778                 ldap_pvt_thread_rdwr_destroy( &tm->t_rwlock );
4779                 free( tm->t_attrs.attrs );
4780                 free( tm );
4781         }
4782
4783         for ( i=0; i<cm->numattrsets; i++ ) {
4784                 free( qm->attr_sets[i].attrs );
4785         }
4786         free( qm->attr_sets );
4787         qm->attr_sets = NULL;
4788
4789 #ifdef PCACHE_MONITOR
4790         if ( rc == LDAP_SUCCESS ) {
4791                 rc = pcache_monitor_db_close( be );
4792         }
4793 #endif /* PCACHE_MONITOR */
4794
4795         return rc;
4796 }
4797
4798 static int
4799 pcache_db_destroy(
4800         BackendDB *be,
4801         ConfigReply *cr
4802 )
4803 {
4804         slap_overinst *on = (slap_overinst *)be->bd_info;
4805         cache_manager *cm = on->on_bi.bi_private;
4806         query_manager *qm = cm->qm;
4807
4808         if ( cm->db.be_private != NULL ) {
4809                 backend_stopdown_one( &cm->db );
4810         }
4811
4812         ldap_pvt_thread_mutex_destroy( &qm->lru_mutex );
4813         ldap_pvt_thread_mutex_destroy( &cm->cache_mutex );
4814         free( qm );
4815         free( cm );
4816
4817 #ifdef PCACHE_MONITOR
4818         pcache_monitor_db_destroy( be );
4819 #endif /* PCACHE_MONITOR */
4820
4821         return 0;
4822 }
4823
4824 #ifdef PCACHE_CONTROL_PRIVDB
4825 /*
4826         Control ::= SEQUENCE {
4827              controlType             LDAPOID,
4828              criticality             BOOLEAN DEFAULT FALSE,
4829              controlValue            OCTET STRING OPTIONAL }
4830
4831         controlType ::= 1.3.6.1.4.1.4203.666.11.9.5.1
4832
4833  * criticality must be TRUE; controlValue must be absent.
4834  */
4835 static int
4836 parse_privdb_ctrl(
4837         Operation       *op,
4838         SlapReply       *rs,
4839         LDAPControl     *ctrl )
4840 {
4841         if ( op->o_ctrlflag[ privDB_cid ] != SLAP_CONTROL_NONE ) {
4842                 rs->sr_text = "privateDB control specified multiple times";
4843                 return LDAP_PROTOCOL_ERROR;
4844         }
4845
4846         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
4847                 rs->sr_text = "privateDB control value not absent";
4848                 return LDAP_PROTOCOL_ERROR;
4849         }
4850
4851         if ( !ctrl->ldctl_iscritical ) {
4852                 rs->sr_text = "privateDB control criticality required";
4853                 return LDAP_PROTOCOL_ERROR;
4854         }
4855
4856         op->o_ctrlflag[ privDB_cid ] = SLAP_CONTROL_CRITICAL;
4857
4858         return LDAP_SUCCESS;
4859 }
4860
4861 static char *extops[] = {
4862         LDAP_EXOP_MODIFY_PASSWD,
4863         NULL
4864 };
4865 #endif /* PCACHE_CONTROL_PRIVDB */
4866
4867 static struct berval pcache_exop_MODIFY_PASSWD = BER_BVC( LDAP_EXOP_MODIFY_PASSWD );
4868 #ifdef PCACHE_EXOP_QUERY_DELETE
4869 static struct berval pcache_exop_QUERY_DELETE = BER_BVC( PCACHE_EXOP_QUERY_DELETE );
4870
4871 #define LDAP_TAG_EXOP_QUERY_DELETE_BASE ((LBER_CLASS_CONTEXT|LBER_CONSTRUCTED) + 0)
4872 #define LDAP_TAG_EXOP_QUERY_DELETE_DN   ((LBER_CLASS_CONTEXT|LBER_CONSTRUCTED) + 1)
4873 #define LDAP_TAG_EXOP_QUERY_DELETE_UUID ((LBER_CLASS_CONTEXT|LBER_CONSTRUCTED) + 2)
4874
4875 /*
4876         ExtendedRequest ::= [APPLICATION 23] SEQUENCE {
4877              requestName      [0] LDAPOID,
4878              requestValue     [1] OCTET STRING OPTIONAL }
4879
4880         requestName ::= 1.3.6.1.4.1.4203.666.11.9.6.1
4881
4882         requestValue ::= SEQUENCE { CHOICE {
4883                   baseDN           [0] LDAPDN
4884                   entryDN          [1] LDAPDN },
4885              queryID          [2] OCTET STRING (SIZE(16))
4886                   -- constrained to UUID }
4887
4888  * Either baseDN or entryDN must be present, to allow database selection.
4889  *
4890  * 1. if baseDN and queryID are present, then the query corresponding
4891  *    to queryID is deleted;
4892  * 2. if baseDN is present and queryID is absent, then all queries
4893  *    are deleted;
4894  * 3. if entryDN is present and queryID is absent, then all queries
4895  *    corresponding to the queryID values present in entryDN are deleted;
4896  * 4. if entryDN and queryID are present, then all queries
4897  *    corresponding to the queryID values present in entryDN are deleted,
4898  *    but only if the value of queryID is contained in the entry;
4899  *
4900  * Currently, only 1, 3 and 4 are implemented.  2 can be obtained by either
4901  * recursively deleting the database (ldapdelete -r) with PRIVDB control,
4902  * or by removing the database files.
4903
4904         ExtendedResponse ::= [APPLICATION 24] SEQUENCE {
4905              COMPONENTS OF LDAPResult,
4906              responseName     [10] LDAPOID OPTIONAL,
4907              responseValue    [11] OCTET STRING OPTIONAL }
4908
4909  * responseName and responseValue must be absent.
4910  */
4911
4912 /*
4913  * - on success, *tagp is either LDAP_TAG_EXOP_QUERY_DELETE_BASE
4914  *   or LDAP_TAG_EXOP_QUERY_DELETE_DN.
4915  * - if ndn != NULL, it is set to the normalized DN in the request
4916  *   corresponding to either the baseDN or the entryDN, according
4917  *   to *tagp; memory is malloc'ed on the Operation's slab, and must
4918  *   be freed by the caller.
4919  * - if uuid != NULL, it is set to point to the normalized UUID;
4920  *   memory is malloc'ed on the Operation's slab, and must
4921  *   be freed by the caller.
4922  */
4923 static int
4924 pcache_parse_query_delete(
4925         struct berval   *in,
4926         ber_tag_t       *tagp,
4927         struct berval   *ndn,
4928         struct berval   *uuid,
4929         const char      **text,
4930         void            *ctx )
4931 {
4932         int                     rc = LDAP_SUCCESS;
4933         ber_tag_t               tag;
4934         ber_len_t               len = -1;
4935         BerElementBuffer        berbuf;
4936         BerElement              *ber = (BerElement *)&berbuf;
4937         struct berval           reqdata = BER_BVNULL;
4938
4939         *text = NULL;
4940
4941         if ( ndn ) {
4942                 BER_BVZERO( ndn );
4943         }
4944
4945         if ( uuid ) {
4946                 BER_BVZERO( uuid );
4947         }
4948
4949         if ( in == NULL || in->bv_len == 0 ) {
4950                 *text = "empty request data field in queryDelete exop";
4951                 return LDAP_PROTOCOL_ERROR;
4952         }
4953
4954         ber_dupbv_x( &reqdata, in, ctx );
4955
4956         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
4957         ber_init2( ber, &reqdata, 0 );
4958
4959         tag = ber_scanf( ber, "{" /*}*/ );
4960
4961         if ( tag == LBER_ERROR ) {
4962                 Debug( LDAP_DEBUG_TRACE,
4963                         "pcache_parse_query_delete: decoding error.\n",
4964                         0, 0, 0 );
4965                 goto decoding_error;
4966         }
4967
4968         tag = ber_peek_tag( ber, &len );
4969         if ( tag == LDAP_TAG_EXOP_QUERY_DELETE_BASE
4970                 || tag == LDAP_TAG_EXOP_QUERY_DELETE_DN )
4971         {
4972                 *tagp = tag;
4973
4974                 if ( ndn != NULL ) {
4975                         struct berval   dn;
4976
4977                         tag = ber_scanf( ber, "m", &dn );
4978                         if ( tag == LBER_ERROR ) {
4979                                 Debug( LDAP_DEBUG_TRACE,
4980                                         "pcache_parse_query_delete: DN parse failed.\n",
4981                                         0, 0, 0 );
4982                                 goto decoding_error;
4983                         }
4984
4985                         rc = dnNormalize( 0, NULL, NULL, &dn, ndn, ctx );
4986                         if ( rc != LDAP_SUCCESS ) {
4987                                 *text = "invalid DN in queryDelete exop request data";
4988                                 goto done;
4989                         }
4990
4991                 } else {
4992                         tag = ber_scanf( ber, "x" /* "m" */ );
4993                         if ( tag == LBER_DEFAULT ) {
4994                                 goto decoding_error;
4995                         }
4996                 }
4997
4998                 tag = ber_peek_tag( ber, &len );
4999         }
5000
5001         if ( tag == LDAP_TAG_EXOP_QUERY_DELETE_UUID ) {
5002                 if ( uuid != NULL ) {
5003                         struct berval   bv;
5004                         char            uuidbuf[ LDAP_LUTIL_UUIDSTR_BUFSIZE ];
5005
5006                         tag = ber_scanf( ber, "m", &bv );
5007                         if ( tag == LBER_ERROR ) {
5008                                 Debug( LDAP_DEBUG_TRACE,
5009                                         "pcache_parse_query_delete: UUID parse failed.\n",
5010                                         0, 0, 0 );
5011                                 goto decoding_error;
5012                         }
5013
5014                         if ( bv.bv_len != 16 ) {
5015                                 Debug( LDAP_DEBUG_TRACE,
5016                                         "pcache_parse_query_delete: invalid UUID length %lu.\n",
5017                                         (unsigned long)bv.bv_len, 0, 0 );
5018                                 goto decoding_error;
5019                         }
5020
5021                         rc = lutil_uuidstr_from_normalized(
5022                                 bv.bv_val, bv.bv_len,
5023                                 uuidbuf, sizeof( uuidbuf ) );
5024                         if ( rc == -1 ) {
5025                                 goto decoding_error;
5026                         }
5027                         ber_str2bv( uuidbuf, rc, 1, uuid );
5028                         rc = LDAP_SUCCESS;
5029
5030                 } else {
5031                         tag = ber_skip_tag( ber, &len );
5032                         if ( tag == LBER_DEFAULT ) {
5033                                 goto decoding_error;
5034                         }
5035
5036                         if ( len != 16 ) {
5037                                 Debug( LDAP_DEBUG_TRACE,
5038                                         "pcache_parse_query_delete: invalid UUID length %lu.\n",
5039                                         (unsigned long)len, 0, 0 );
5040                                 goto decoding_error;
5041                         }
5042                 }
5043
5044                 tag = ber_peek_tag( ber, &len );
5045         }
5046
5047         if ( tag != LBER_DEFAULT || len != 0 ) {
5048 decoding_error:;
5049                 Debug( LDAP_DEBUG_TRACE,
5050                         "pcache_parse_query_delete: decoding error\n",
5051                         0, 0, 0 );
5052                 rc = LDAP_PROTOCOL_ERROR;
5053                 *text = "queryDelete data decoding error";
5054
5055 done:;
5056                 if ( ndn && !BER_BVISNULL( ndn ) ) {
5057                         slap_sl_free( ndn->bv_val, ctx );
5058                         BER_BVZERO( ndn );
5059                 }
5060
5061                 if ( uuid && !BER_BVISNULL( uuid ) ) {
5062                         slap_sl_free( uuid->bv_val, ctx );
5063                         BER_BVZERO( uuid );
5064                 }
5065         }
5066
5067         if ( !BER_BVISNULL( &reqdata ) ) {
5068                 ber_memfree_x( reqdata.bv_val, ctx );
5069         }
5070
5071         return rc;
5072 }
5073
5074 static int
5075 pcache_exop_query_delete(
5076         Operation       *op,
5077         SlapReply       *rs )
5078 {
5079         BackendDB       *bd = op->o_bd;
5080
5081         struct berval   uuid = BER_BVNULL,
5082                         *uuidp = NULL;
5083         char            buf[ SLAP_TEXT_BUFLEN ];
5084         unsigned        len;
5085         ber_tag_t       tag = LBER_DEFAULT;
5086
5087         if ( LogTest( LDAP_DEBUG_STATS ) ) {
5088                 uuidp = &uuid;
5089         }
5090
5091         rs->sr_err = pcache_parse_query_delete( op->ore_reqdata,
5092                 &tag, &op->o_req_ndn, uuidp,
5093                 &rs->sr_text, op->o_tmpmemctx );
5094         if ( rs->sr_err != LDAP_SUCCESS ) {
5095                 return rs->sr_err;
5096         }
5097
5098         if ( LogTest( LDAP_DEBUG_STATS ) ) {
5099                 assert( !BER_BVISNULL( &op->o_req_ndn ) );
5100                 len = snprintf( buf, sizeof( buf ), " dn=\"%s\"", op->o_req_ndn.bv_val );
5101
5102                 if ( !BER_BVISNULL( &uuid ) && len < sizeof( buf ) ) {
5103                         snprintf( &buf[ len ], sizeof( buf ) - len, " pcacheQueryId=\"%s\"", uuid.bv_val );
5104                 }
5105
5106                 Debug( LDAP_DEBUG_STATS, "%s QUERY DELETE%s\n",
5107                         op->o_log_prefix, buf, 0 );
5108         }
5109         op->o_req_dn = op->o_req_ndn;
5110
5111         op->o_bd = select_backend( &op->o_req_ndn, 0 );
5112         rs->sr_err = backend_check_restrictions( op, rs,
5113                 (struct berval *)&pcache_exop_QUERY_DELETE );
5114         if ( rs->sr_err != LDAP_SUCCESS ) {
5115                 goto done;
5116         }
5117
5118         if ( op->o_bd->be_extended == NULL ) {
5119                 send_ldap_error( op, rs, LDAP_UNAVAILABLE_CRITICAL_EXTENSION,
5120                         "backend does not support extended operations" );
5121                 goto done;
5122         }
5123
5124         op->o_bd->be_extended( op, rs );
5125
5126 done:;
5127         if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
5128                 op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
5129                 BER_BVZERO( &op->o_req_ndn );
5130                 BER_BVZERO( &op->o_req_dn );
5131         }
5132
5133         if ( !BER_BVISNULL( &uuid ) ) {
5134                 op->o_tmpfree( uuid.bv_val, op->o_tmpmemctx );
5135         }
5136
5137         op->o_bd = bd;
5138
5139         return rs->sr_err;
5140 }
5141 #endif /* PCACHE_EXOP_QUERY_DELETE */
5142
5143 static int
5144 pcache_op_extended( Operation *op, SlapReply *rs )
5145 {
5146         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
5147         cache_manager   *cm = on->on_bi.bi_private;
5148
5149 #ifdef PCACHE_CONTROL_PRIVDB
5150         if ( op->o_ctrlflag[ privDB_cid ] == SLAP_CONTROL_CRITICAL ) {
5151                 return pcache_op_privdb( op, rs );
5152         }
5153 #endif /* PCACHE_CONTROL_PRIVDB */
5154
5155 #ifdef PCACHE_EXOP_QUERY_DELETE
5156         if ( bvmatch( &op->ore_reqoid, &pcache_exop_QUERY_DELETE ) ) {
5157                 struct berval   uuid = BER_BVNULL;
5158                 ber_tag_t       tag = LBER_DEFAULT;
5159
5160                 rs->sr_err = pcache_parse_query_delete( op->ore_reqdata,
5161                         &tag, NULL, &uuid, &rs->sr_text, op->o_tmpmemctx );
5162                 assert( rs->sr_err == LDAP_SUCCESS );
5163
5164                 if ( tag == LDAP_TAG_EXOP_QUERY_DELETE_DN ) {
5165                         /* remove all queries related to the selected entry */
5166                         rs->sr_err = pcache_remove_entry_queries_from_cache( op,
5167                                 cm, &op->o_req_ndn, &uuid );
5168
5169                 } else if ( tag == LDAP_TAG_EXOP_QUERY_DELETE_BASE ) {
5170                         if ( !BER_BVISNULL( &uuid ) ) {
5171                                 /* remove the selected query */
5172                                 rs->sr_err = pcache_remove_query_from_cache( op,
5173                                         cm, &uuid );
5174
5175                         } else {
5176                                 /* TODO: remove all queries */
5177                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
5178                                 rs->sr_text = "deletion of all queries not implemented";
5179                         }
5180                 }
5181
5182                 op->o_tmpfree( uuid.bv_val, op->o_tmpmemctx );
5183                 return rs->sr_err;
5184         }
5185 #endif /* PCACHE_EXOP_QUERY_DELETE */
5186
5187         /* We only care if we're configured for Bind caching */
5188         if ( bvmatch( &op->ore_reqoid, &pcache_exop_MODIFY_PASSWD ) &&
5189                 cm->cache_binds ) {
5190                 /* See if the local entry exists and has a password.
5191                  * It's too much work to find the matching query, so
5192                  * we just see if there's a hashed password to update.
5193                  */
5194                 Operation op2 = *op;
5195                 Entry *e = NULL;
5196                 int rc;
5197                 int doit = 0;
5198
5199                 op2.o_bd = &cm->db;
5200                 op2.o_dn = op->o_bd->be_rootdn;
5201                 op2.o_ndn = op->o_bd->be_rootndn;
5202                 rc = be_entry_get_rw( &op2, &op->o_req_ndn, NULL,
5203                         slap_schema.si_ad_userPassword, 0, &e );
5204                 if ( rc == LDAP_SUCCESS && e ) {
5205                         /* See if a recognized password is hashed here */
5206                         Attribute *a = attr_find( e->e_attrs,
5207                                 slap_schema.si_ad_userPassword );
5208                         if ( a && a->a_vals[0].bv_val[0] == '{' &&
5209                                 lutil_passwd_scheme( a->a_vals[0].bv_val )) {
5210                                 doit = 1;
5211                         }
5212                         be_entry_release_r( &op2, e );
5213                 }
5214
5215                 if ( doit ) {
5216                         rc = overlay_op_walk( op, rs, op_extended, on->on_info,
5217                                 on->on_next );
5218                         if ( rc == LDAP_SUCCESS ) {
5219                                 req_pwdexop_s *qpw = &op->oq_pwdexop;
5220
5221                                 /* We don't care if it succeeds or not */
5222                                 pc_setpw( &op2, &qpw->rs_new, cm );
5223                         }
5224                         return rc;
5225                 }
5226         }
5227         return SLAP_CB_CONTINUE;
5228 }
5229
5230 static int
5231 pcache_entry_release( Operation  *op, Entry *e, int rw )
5232 {
5233         slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
5234         cache_manager   *cm = on->on_bi.bi_private;
5235         BackendDB *db = op->o_bd;
5236         int rc;
5237
5238         op->o_bd = &cm->db;
5239         rc = be_entry_release_rw( op, e, rw );
5240         op->o_bd = db;
5241         return rc;
5242 }
5243
5244 #ifdef PCACHE_MONITOR
5245
5246 static int
5247 pcache_monitor_update(
5248         Operation       *op,
5249         SlapReply       *rs,
5250         Entry           *e,
5251         void            *priv )
5252 {
5253         cache_manager   *cm = (cache_manager *) priv;
5254         query_manager   *qm = cm->qm;
5255
5256         CachedQuery     *qc;
5257         BerVarray       vals = NULL;
5258
5259         attr_delete( &e->e_attrs, ad_cachedQueryURL );
5260         if ( ( SLAP_OPATTRS( rs->sr_attr_flags ) || ad_inlist( ad_cachedQueryURL, rs->sr_attrs ) )
5261                 && qm->templates != NULL )
5262         {
5263                 QueryTemplate *tm;
5264
5265                 for ( tm = qm->templates; tm != NULL; tm = tm->qmnext ) {
5266                         for ( qc = tm->query; qc; qc = qc->next ) {
5267                                 struct berval   bv;
5268
5269                                 if ( query2url( op, qc, &bv, 1 ) == 0 ) {
5270                                         ber_bvarray_add_x( &vals, &bv, op->o_tmpmemctx );
5271                                 }
5272                         }
5273                 }
5274
5275
5276                 if ( vals != NULL ) {
5277                         attr_merge_normalize( e, ad_cachedQueryURL, vals, NULL );
5278                         ber_bvarray_free_x( vals, op->o_tmpmemctx );
5279                 }
5280         }
5281
5282         {
5283                 Attribute       *a;
5284                 char            buf[ SLAP_TEXT_BUFLEN ];
5285                 struct berval   bv;
5286
5287                 /* number of cached queries */
5288                 a = attr_find( e->e_attrs, ad_numQueries );
5289                 assert( a != NULL );
5290
5291                 bv.bv_val = buf;
5292                 bv.bv_len = snprintf( buf, sizeof( buf ), "%lu", cm->num_cached_queries );
5293
5294                 if ( a->a_nvals != a->a_vals ) {
5295                         ber_bvreplace( &a->a_nvals[ 0 ], &bv );
5296                 }
5297                 ber_bvreplace( &a->a_vals[ 0 ], &bv );
5298
5299                 /* number of cached entries */
5300                 a = attr_find( e->e_attrs, ad_numEntries );
5301                 assert( a != NULL );
5302
5303                 bv.bv_val = buf;
5304                 bv.bv_len = snprintf( buf, sizeof( buf ), "%d", cm->cur_entries );
5305
5306                 if ( a->a_nvals != a->a_vals ) {
5307                         ber_bvreplace( &a->a_nvals[ 0 ], &bv );
5308                 }
5309                 ber_bvreplace( &a->a_vals[ 0 ], &bv );
5310         }
5311
5312         return SLAP_CB_CONTINUE;
5313 }
5314
5315 static int
5316 pcache_monitor_free(
5317         Entry           *e,
5318         void            **priv )
5319 {
5320         struct berval   values[ 2 ];
5321         Modification    mod = { 0 };
5322
5323         const char      *text;
5324         char            textbuf[ SLAP_TEXT_BUFLEN ];
5325
5326         int             rc;
5327
5328         /* NOTE: if slap_shutdown != 0, priv might have already been freed */
5329         *priv = NULL;
5330
5331         /* Remove objectClass */
5332         mod.sm_op = LDAP_MOD_DELETE;
5333         mod.sm_desc = slap_schema.si_ad_objectClass;
5334         mod.sm_values = values;
5335         mod.sm_numvals = 1;
5336         values[ 0 ] = oc_olmPCache->soc_cname;
5337         BER_BVZERO( &values[ 1 ] );
5338
5339         rc = modify_delete_values( e, &mod, 1, &text,
5340                 textbuf, sizeof( textbuf ) );
5341         /* don't care too much about return code... */
5342
5343         /* remove attrs */
5344         mod.sm_values = NULL;
5345         mod.sm_desc = ad_cachedQueryURL;
5346         mod.sm_numvals = 0;
5347         rc = modify_delete_values( e, &mod, 1, &text,
5348                 textbuf, sizeof( textbuf ) );
5349         /* don't care too much about return code... */
5350
5351         /* remove attrs */
5352         mod.sm_values = NULL;
5353         mod.sm_desc = ad_numQueries;
5354         mod.sm_numvals = 0;
5355         rc = modify_delete_values( e, &mod, 1, &text,
5356                 textbuf, sizeof( textbuf ) );
5357         /* don't care too much about return code... */
5358
5359         /* remove attrs */
5360         mod.sm_values = NULL;
5361         mod.sm_desc = ad_numEntries;
5362         mod.sm_numvals = 0;
5363         rc = modify_delete_values( e, &mod, 1, &text,
5364                 textbuf, sizeof( textbuf ) );
5365         /* don't care too much about return code... */
5366
5367         return SLAP_CB_CONTINUE;
5368 }
5369
5370 /*
5371  * call from within pcache_initialize()
5372  */
5373 static int
5374 pcache_monitor_initialize( void )
5375 {
5376         static int      pcache_monitor_initialized = 0;
5377
5378         if ( backend_info( "monitor" ) == NULL ) {
5379                 return -1;
5380         }
5381
5382         if ( pcache_monitor_initialized++ ) {
5383                 return 0;
5384         }
5385
5386         return 0;
5387 }
5388
5389 static int
5390 pcache_monitor_db_init( BackendDB *be )
5391 {
5392         if ( pcache_monitor_initialize() == LDAP_SUCCESS ) {
5393                 SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_MONITORING;
5394         }
5395
5396         return 0;
5397 }
5398
5399 static int
5400 pcache_monitor_db_open( BackendDB *be )
5401 {
5402         slap_overinst           *on = (slap_overinst *)be->bd_info;
5403         cache_manager           *cm = on->on_bi.bi_private;
5404         Attribute               *a, *next;
5405         monitor_callback_t      *cb = NULL;
5406         int                     rc = 0;
5407         BackendInfo             *mi;
5408         monitor_extra_t         *mbe;
5409         struct berval           dummy = BER_BVC( "" );
5410
5411         if ( !SLAP_DBMONITORING( be ) ) {
5412                 return 0;
5413         }
5414
5415         mi = backend_info( "monitor" );
5416         if ( !mi || !mi->bi_extra ) {
5417                 SLAP_DBFLAGS( be ) ^= SLAP_DBFLAG_MONITORING;
5418                 return 0;
5419         }
5420         mbe = mi->bi_extra;
5421
5422         /* don't bother if monitor is not configured */
5423         if ( !mbe->is_configured() ) {
5424                 static int warning = 0;
5425
5426                 if ( warning++ == 0 ) {
5427                         Debug( LDAP_DEBUG_ANY, "pcache_monitor_db_open: "
5428                                 "monitoring disabled; "
5429                                 "configure monitor database to enable\n",
5430                                 0, 0, 0 );
5431                 }
5432
5433                 return 0;
5434         }
5435
5436         /* alloc as many as required (plus 1 for objectClass) */
5437         a = attrs_alloc( 1 + 2 );
5438         if ( a == NULL ) {
5439                 rc = 1;
5440                 goto cleanup;
5441         }
5442
5443         a->a_desc = slap_schema.si_ad_objectClass;
5444         attr_valadd( a, &oc_olmPCache->soc_cname, NULL, 1 );
5445         next = a->a_next;
5446
5447         {
5448                 struct berval   bv = BER_BVC( "0" );
5449
5450                 next->a_desc = ad_numQueries;
5451                 attr_valadd( next, &bv, NULL, 1 );
5452                 next = next->a_next;
5453
5454                 next->a_desc = ad_numEntries;
5455                 attr_valadd( next, &bv, NULL, 1 );
5456                 next = next->a_next;
5457         }
5458
5459         cb = ch_calloc( sizeof( monitor_callback_t ), 1 );
5460         cb->mc_update = pcache_monitor_update;
5461         cb->mc_free = pcache_monitor_free;
5462         cb->mc_private = (void *)cm;
5463
5464         /* make sure the database is registered; then add monitor attributes */
5465         BER_BVZERO( &cm->monitor_ndn );
5466         rc = mbe->register_overlay( be, on, &cm->monitor_ndn );
5467         if ( rc == 0 ) {
5468                 rc = mbe->register_entry_attrs( &cm->monitor_ndn, a, cb,
5469                         &dummy, -1, &dummy);
5470         }
5471
5472 cleanup:;
5473         if ( rc != 0 ) {
5474                 if ( cb != NULL ) {
5475                         ch_free( cb );
5476                         cb = NULL;
5477                 }
5478
5479                 if ( a != NULL ) {
5480                         attrs_free( a );
5481                         a = NULL;
5482                 }
5483         }
5484
5485         /* store for cleanup */
5486         cm->monitor_cb = (void *)cb;
5487
5488         /* we don't need to keep track of the attributes, because
5489          * bdb_monitor_free() takes care of everything */
5490         if ( a != NULL ) {
5491                 attrs_free( a );
5492         }
5493
5494         return rc;
5495 }
5496
5497 static int
5498 pcache_monitor_db_close( BackendDB *be )
5499 {
5500         slap_overinst *on = (slap_overinst *)be->bd_info;
5501         cache_manager *cm = on->on_bi.bi_private;
5502
5503         if ( cm->monitor_cb != NULL ) {
5504                 BackendInfo             *mi = backend_info( "monitor" );
5505                 monitor_extra_t         *mbe;
5506
5507                 if ( mi && &mi->bi_extra ) {
5508                         mbe = mi->bi_extra;
5509                         mbe->unregister_entry_callback( NULL,
5510                                 (monitor_callback_t *)cm->monitor_cb,
5511                                 NULL, 0, NULL );
5512                 }
5513         }
5514
5515         return 0;
5516 }
5517
5518 static int
5519 pcache_monitor_db_destroy( BackendDB *be )
5520 {
5521         return 0;
5522 }
5523
5524 #endif /* PCACHE_MONITOR */
5525
5526 static slap_overinst pcache;
5527
5528 static char *obsolete_names[] = {
5529         "proxycache",
5530         NULL
5531 };
5532
5533 #if SLAPD_OVER_PROXYCACHE == SLAPD_MOD_DYNAMIC
5534 static
5535 #endif /* SLAPD_OVER_PROXYCACHE == SLAPD_MOD_DYNAMIC */
5536 int
5537 pcache_initialize()
5538 {
5539         int i, code;
5540         struct berval debugbv = BER_BVC("pcache");
5541         ConfigArgs c;
5542         char *argv[ 4 ];
5543
5544         code = slap_loglevel_get( &debugbv, &pcache_debug );
5545         if ( code ) {
5546                 return code;
5547         }
5548
5549 #ifdef PCACHE_CONTROL_PRIVDB
5550         code = register_supported_control( PCACHE_CONTROL_PRIVDB,
5551                 SLAP_CTRL_BIND|SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE, extops,
5552                 parse_privdb_ctrl, &privDB_cid );
5553         if ( code != LDAP_SUCCESS ) {
5554                 Debug( LDAP_DEBUG_ANY,
5555                         "pcache_initialize: failed to register control %s (%d)\n",
5556                         PCACHE_CONTROL_PRIVDB, code, 0 );
5557                 return code;
5558         }
5559 #endif /* PCACHE_CONTROL_PRIVDB */
5560
5561 #ifdef PCACHE_EXOP_QUERY_DELETE
5562         code = load_extop2( (struct berval *)&pcache_exop_QUERY_DELETE,
5563                 SLAP_EXOP_WRITES|SLAP_EXOP_HIDE, pcache_exop_query_delete,
5564                 0 );
5565         if ( code != LDAP_SUCCESS ) {
5566                 Debug( LDAP_DEBUG_ANY,
5567                         "pcache_initialize: unable to register queryDelete exop: %d.\n",
5568                         code, 0, 0 );
5569                 return code;
5570         }
5571 #endif /* PCACHE_EXOP_QUERY_DELETE */
5572
5573         argv[ 0 ] = "back-bdb/back-hdb monitor";
5574         c.argv = argv;
5575         c.argc = 3;
5576         c.fname = argv[0];
5577
5578         for ( i = 0; s_oid[ i ].name; i++ ) {
5579                 c.lineno = i;
5580                 argv[ 1 ] = s_oid[ i ].name;
5581                 argv[ 2 ] = s_oid[ i ].oid;
5582
5583                 if ( parse_oidm( &c, 0, NULL ) != 0 ) {
5584                         Debug( LDAP_DEBUG_ANY, "pcache_initialize: "
5585                                 "unable to add objectIdentifier \"%s=%s\"\n",
5586                                 s_oid[ i ].name, s_oid[ i ].oid, 0 );
5587                         return 1;
5588                 }
5589         }
5590
5591         for ( i = 0; s_ad[i].desc != NULL; i++ ) {
5592                 code = register_at( s_ad[i].desc, s_ad[i].adp, 0 );
5593                 if ( code ) {
5594                         Debug( LDAP_DEBUG_ANY,
5595                                 "pcache_initialize: register_at #%d failed\n", i, 0, 0 );
5596                         return code;
5597                 }
5598                 (*s_ad[i].adp)->ad_type->sat_flags |= SLAP_AT_HIDE;
5599         }
5600
5601         for ( i = 0; s_oc[i].desc != NULL; i++ ) {
5602                 code = register_oc( s_oc[i].desc, s_oc[i].ocp, 0 );
5603                 if ( code ) {
5604                         Debug( LDAP_DEBUG_ANY,
5605                                 "pcache_initialize: register_oc #%d failed\n", i, 0, 0 );
5606                         return code;
5607                 }
5608                 (*s_oc[i].ocp)->soc_flags |= SLAP_OC_HIDE;
5609         }
5610
5611         pcache.on_bi.bi_type = "pcache";
5612         pcache.on_bi.bi_obsolete_names = obsolete_names;
5613         pcache.on_bi.bi_db_init = pcache_db_init;
5614         pcache.on_bi.bi_db_config = pcache_db_config;
5615         pcache.on_bi.bi_db_open = pcache_db_open;
5616         pcache.on_bi.bi_db_close = pcache_db_close;
5617         pcache.on_bi.bi_db_destroy = pcache_db_destroy;
5618
5619         pcache.on_bi.bi_op_search = pcache_op_search;
5620         pcache.on_bi.bi_op_bind = pcache_op_bind;
5621 #ifdef PCACHE_CONTROL_PRIVDB
5622         pcache.on_bi.bi_op_compare = pcache_op_privdb;
5623         pcache.on_bi.bi_op_modrdn = pcache_op_privdb;
5624         pcache.on_bi.bi_op_modify = pcache_op_privdb;
5625         pcache.on_bi.bi_op_add = pcache_op_privdb;
5626         pcache.on_bi.bi_op_delete = pcache_op_privdb;
5627 #endif /* PCACHE_CONTROL_PRIVDB */
5628         pcache.on_bi.bi_extended = pcache_op_extended;
5629
5630         pcache.on_bi.bi_entry_release_rw = pcache_entry_release;
5631         pcache.on_bi.bi_chk_controls = pcache_chk_controls;
5632
5633         pcache.on_bi.bi_cf_ocs = pcocs;
5634
5635         code = config_register_schema( pccfg, pcocs );
5636         if ( code ) return code;
5637
5638         return overlay_register( &pcache );
5639 }
5640
5641 #if SLAPD_OVER_PROXYCACHE == SLAPD_MOD_DYNAMIC
5642 int init_module(int argc, char *argv[]) {
5643         return pcache_initialize();
5644 }
5645 #endif
5646
5647 #endif  /* defined(SLAPD_OVER_PROXYCACHE) */