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

   1 /* syncprov.c - syncrepl provider */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 2004 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* ACKNOWLEDGEMENTS:
  16  * This work was initially developed by Howard Chu for inclusion in
  17  * OpenLDAP Software.
  18  */
  19
  20 #include "portable.h"
  21
  22 #ifdef SLAPD_OVER_SYNCPROV
  23
  24 #include <ac/string.h>
  25 #include "lutil.h"
  26 #include "slap.h"
  27
  28 /* A queued result of a persistent search */
  29 typedef struct syncres {
  30         struct syncres *s_next;
  31         struct berval s_dn;
  32         struct berval s_ndn;
  33         struct berval s_uuid;
  34         struct berval s_csn;
  35         char s_mode;
  36         char s_isreference;
  37 } syncres;
  38
  39 /* Record of a persistent search */
  40 typedef struct syncops {
  41         struct syncops *s_next;
  42         struct berval   s_base;         /* ndn of search base */
  43         ID              s_eid;          /* entryID of search base */
  44         Operation       *s_op;          /* search op */
  45         Filter  *s_filter;
  46         int             s_flags;        /* search status */
  47         struct syncres *s_res;
  48         struct syncres *s_restail;
  49         ldap_pvt_thread_mutex_t s_mutex;
  50 } syncops;
  51
  52 static int      sync_cid;
  53
  54 #define PS_IS_REFRESHING        0x01
  55
  56 /* Record of which searches matched at premodify step */
  57 typedef struct syncmatches {
  58         struct syncmatches *sm_next;
  59         syncops *sm_op;
  60 } syncmatches;
  61
  62 typedef struct syncprov_info_t {
  63         syncops         *si_ops;
  64         struct berval   si_ctxcsn;      /* ldapsync context */
  65         int             si_gotcsn;      /* is our ctxcsn up to date? */
  66         ldap_pvt_thread_mutex_t si_csn_mutex;
  67         ldap_pvt_thread_mutex_t si_ops_mutex;
  68         char            si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
  69 } syncprov_info_t;
  70
  71 typedef struct opcookie {
  72         slap_overinst *son;
  73         syncmatches *smatches;
  74         struct berval sdn;      /* DN of entry, for deletes */
  75         struct berval sndn;
  76         struct berval suuid;    /* UUID of entry */
  77         struct berval sctxcsn;
  78         int sreference; /* Is the entry a reference? */
  79 } opcookie;
  80
  81 typedef struct fbase_cookie {
  82         struct berval *fdn;     /* DN of a modified entry, for scope testing */
  83         syncops *fss;   /* persistent search we're testing against */
  84         int fbase;      /* if TRUE we found the search base and it's still valid */
  85         int fscope;     /* if TRUE then fdn is within the psearch scope */
  86 } fbase_cookie;
  87
  88 static AttributeName csn_anlist[2];
  89 static AttributeName uuid_anlist[2];
  90
  91 /* syncprov_findbase:
  92  *   finds the true DN of the base of a search (with alias dereferencing) and
  93  * checks to make sure the base entry doesn't get replaced with a different
  94  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
  95  * change is detected, any persistent search on this base must be terminated /
  96  * reloaded.
  97  *   On the first call, we just save the DN and entryID. On subsequent calls
  98  * we compare the DN and entryID with the saved values.
  99  */
 100 static int
 101 findbase_cb( Operation *op, SlapReply *rs )
 102 {
 103         slap_callback *sc = op->o_callback;
 104
 105         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 106                 fbase_cookie *fc = sc->sc_private;
 107
 108                 /* If no entryID, we're looking for the first time.
 109                  * Just store whatever we got.
 110                  */
 111                 if ( fc->fss->s_eid == NOID ) {
 112                         fc->fbase = 1;
 113                         fc->fss->s_eid = rs->sr_entry->e_id;
 114                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 115
 116                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 117                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 118
 119                 /* OK, the DN is the same and the entryID is the same. Now
 120                  * see if the fdn resides in the scope.
 121                  */
 122                         fc->fbase = 1;
 123                         switch ( fc->fss->s_op->ors_scope ) {
 124                         case LDAP_SCOPE_BASE:
 125                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 126                                 break;
 127                         case LDAP_SCOPE_ONELEVEL: {
 128                                 struct berval pdn;
 129                                 dnParent( fc->fdn, &pdn );
 130                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 131                                 break; }
 132                         case LDAP_SCOPE_SUBTREE:
 133                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 134                                 break;
 135 #ifdef LDAP_SCOPE_SUBORDINATE
 136                         case LDAP_SCOPE_SUBORDINATE:
 137                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 138                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 139                                 break;
 140 #endif
 141                         }
 142                 }
 143         }
 144         return LDAP_SUCCESS;
 145 }
 146
 147 static int
 148 syncprov_findbase( Operation *op, fbase_cookie *fc )
 149 {
 150         opcookie *opc = op->o_callback->sc_private;
 151         slap_overinst *on = opc->son;
 152         syncprov_info_t         *si = on->on_bi.bi_private;
 153
 154         slap_callback cb = {0};
 155         Operation fop;
 156         SlapReply frs = { REP_RESULT };
 157         int rc;
 158
 159         fop = *op;
 160
 161         cb.sc_response = findbase_cb;
 162         cb.sc_private = fc;
 163
 164         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 165         fop.o_callback = &cb;
 166         fop.o_tag = LDAP_REQ_SEARCH;
 167         fop.ors_scope = LDAP_SCOPE_BASE;
 168         fop.ors_deref = fc->fss->s_op->ors_deref;
 169         fop.ors_slimit = 1;
 170         fop.ors_tlimit = SLAP_NO_LIMIT;
 171         fop.ors_attrs = slap_anlist_no_attrs;
 172         fop.ors_attrsonly = 1;
 173         fop.ors_filter = fc->fss->s_op->ors_filter;
 174         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 175
 176         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 177
 178         fop.o_bd->bd_info = on->on_info->oi_orig;
 179         rc = fop.o_bd->be_search( &fop, &frs );
 180         fop.o_bd->bd_info = (BackendInfo *)on;
 181
 182         if ( fc->fbase ) return LDAP_SUCCESS;
 183
 184         /* If entryID has changed, then the base of this search has
 185          * changed. Invalidate the psearch.
 186          */
 187         return LDAP_NO_SUCH_OBJECT;
 188 }
 189
 190 /* syncprov_findcsn:
 191  *   This function has three different purposes, but they all use a search
 192  * that filters on entryCSN so they're combined here.
 193  * 1: when the current contextCSN is unknown (i.e., at server start time)
 194  * and a syncrepl search has arrived with a cookie, we search for all entries
 195  * with CSN >= the cookie CSN, and store the maximum as our contextCSN. Also,
 196  * we expect to find the cookie CSN in the search results, and note if we did
 197  * or not. If not, we assume the cookie is stale. (This may be too restrictive,
 198  * notice case 2.)
 199  *
 200  * 2: when the current contextCSN is known and we have a sync cookie, we search
 201  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 202  * entry is found, the cookie CSN is valid, otherwise it is stale. Case 1 is
 203  * considered a special case of case 2, and both are generally called the
 204  * "find CSN" task.
 205  *
 206  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 207  * CSN, and generate Present records for them. We always collect this result
 208  * in SyncID sets, even if there's only one match.
 209  */
 210 #define FIND_CSN        1
 211 #define FIND_PRESENT    2
 212
 213 typedef struct fcsn_cookie {
 214         struct berval maxcsn;
 215         int gotmatch;
 216 } fcsn_cookie;
 217
 218 static int
 219 findcsn_cb( Operation *op, SlapReply *rs )
 220 {
 221         slap_callback *sc = op->o_callback;
 222
 223         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 224                 /* If the private pointer is set, it points to an fcsn_cookie
 225                  * and we want to record the maxcsn and match state.
 226                  */
 227                 if ( sc->sc_private ) {
 228                         int i;
 229                         fcsn_cookie *fc = sc->sc_private;
 230                         syncrepl_state *srs = op->o_controls[sync_cid];
 231                         Attribute *a = attr_find(rs->sr_entry->e_attrs,
 232                                 slap_schema.si_ad_entryCSN );
 233                         i = ber_bvcmp( &a->a_vals[0], srs->sr_state.ctxcsn );
 234                         if ( i == 0 ) fc->gotmatch = 1;
 235                         i = ber_bvcmp( &a->a_vals[0], &fc->maxcsn );
 236                         if ( i > 0 ) {
 237                                 fc->maxcsn.bv_len = a->a_vals[0].bv_len;
 238                                 strcpy(fc->maxcsn.bv_val, a->a_vals[0].bv_val );
 239                         }
 240                 } else {
 241                 /* Otherwise, if the private pointer is not set, we just
 242                  * want to know if any entry matched the filter.
 243                  */
 244                         sc->sc_private = (void *)1;
 245                 }
 246         }
 247         return LDAP_SUCCESS;
 248 }
 249
 250 /* Build a list of entryUUIDs for sending in a SyncID set */
 251
 252 typedef struct fpres_cookie {
 253         int num;
 254         BerVarray uuids;
 255 } fpres_cookie;
 256
 257 static int
 258 findpres_cb( Operation *op, SlapReply *rs )
 259 {
 260         slap_callback *sc = op->o_callback;
 261         fpres_cookie *pc = sc->sc_private;
 262         int ret = SLAP_CB_CONTINUE;
 263
 264         if ( rs->sr_type == REP_SEARCH ) {
 265                 ret = slap_build_syncUUID_set( op, &pc->uuids, rs->sr_entry );
 266                 if ( ret > 0 ) {
 267                         pc->num++;
 268                         ret = LDAP_SUCCESS;
 269                         if ( pc->num == SLAP_SYNCUUID_SET_SIZE ) {
 270                                 rs->sr_rspoid = LDAP_SYNC_INFO;
 271                                 ret = slap_send_syncinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 272                                         0, pc->uuids, 0 );
 273                                 ber_bvarray_free_x( pc->uuids, op->o_tmpmemctx );
 274                                 pc->uuids = NULL;
 275                                 pc->num = 0;
 276                         }
 277                 } else {
 278                         ret = LDAP_OTHER;
 279                 }
 280         } else if ( rs->sr_type == REP_RESULT ) {
 281                 ret = rs->sr_err;
 282                 if ( pc->num ) {
 283                         rs->sr_rspoid = LDAP_SYNC_INFO;
 284                         ret = slap_send_syncinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 285                                 0, pc->uuids, 0 );
 286                         ber_bvarray_free_x( pc->uuids, op->o_tmpmemctx );
 287                         pc->uuids = NULL;
 288                         pc->num = 0;
 289                 }
 290         }
 291         return ret;
 292 }
 293
 294
 295 static int
 296 syncprov_findcsn( Operation *op, int mode )
 297 {
 298         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 299         syncprov_info_t         *si = on->on_bi.bi_private;
 300
 301         slap_callback cb = {0};
 302         Operation fop;
 303         SlapReply frs = { REP_RESULT };
 304         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 305         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 306         struct berval fbuf;
 307         Filter cf;
 308         AttributeAssertion eq;
 309         int rc;
 310         fcsn_cookie fcookie;
 311         fpres_cookie pcookie;
 312         int locked = 0;
 313         syncrepl_state *srs = op->o_controls[sync_cid];
 314
 315         if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 316                 return LDAP_OTHER;
 317         }
 318
 319         fop = *op;
 320         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 321
 322         fbuf.bv_val = buf;
 323         if ( mode == FIND_CSN ) {
 324                 if ( !si->si_gotcsn ) {
 325                         /* If we don't know the current ctxcsn, find it */
 326                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
 327                         locked = 1;
 328                 }
 329                 if ( !si->si_gotcsn ) {
 330                         cf.f_choice = LDAP_FILTER_GE;
 331                         fop.ors_attrsonly = 0;
 332                         fop.ors_attrs = csn_anlist;
 333                         fop.ors_slimit = SLAP_NO_LIMIT;
 334                         cb.sc_private = &fcookie;
 335                         fcookie.maxcsn.bv_val = cbuf;
 336                         fcookie.maxcsn.bv_len = 0;
 337                         fcookie.gotmatch = 0;
 338                         fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)", srs->sr_state.ctxcsn->bv_val );
 339                 } else {
 340                         if ( locked ) {
 341                                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 342                                 locked = 0;
 343                         }
 344                         cf.f_choice = LDAP_FILTER_LE;
 345                         fop.ors_attrsonly = 1;
 346                         fop.ors_attrs = slap_anlist_no_attrs;
 347                         fop.ors_slimit = 1;
 348                         cb.sc_private = NULL;
 349                         fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)", srs->sr_state.ctxcsn->bv_val );
 350                 }
 351                 cb.sc_response = findcsn_cb;
 352
 353         } else if ( mode == FIND_PRESENT ) {
 354                 cf.f_choice = LDAP_FILTER_LE;
 355                 fop.ors_attrsonly = 0;
 356                 fop.ors_attrs = uuid_anlist;
 357                 fop.ors_slimit = SLAP_NO_LIMIT;
 358                 /* We want pure entries, not referrals */
 359                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 360                 cb.sc_private = &pcookie;
 361                 cb.sc_response = findpres_cb;
 362                 pcookie.num = 0;
 363                 pcookie.uuids = NULL;
 364                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)", srs->sr_state.ctxcsn->bv_val );
 365         }
 366         cf.f_ava = &eq;
 367         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 368         cf.f_av_value = *srs->sr_state.ctxcsn;
 369         cf.f_next = NULL;
 370
 371         fop.o_callback = &cb;
 372         fop.ors_tlimit = SLAP_NO_LIMIT;
 373         fop.ors_filter = &cf;
 374         fop.ors_filterstr = fbuf;
 375
 376         fop.o_bd->bd_info = on->on_info->oi_orig;
 377         rc = fop.o_bd->be_search( &fop, &frs );
 378         fop.o_bd->bd_info = (BackendInfo *)on;
 379
 380         if ( mode == FIND_CSN ) {
 381                 if ( !si->si_gotcsn ) {
 382                         strcpy(si->si_ctxcsnbuf, fcookie.maxcsn.bv_val);
 383                         si->si_ctxcsn.bv_len = fcookie.maxcsn.bv_len;
 384                         si->si_gotcsn = 1;
 385                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 386                         if ( fcookie.gotmatch ) return LDAP_SUCCESS;
 387
 388                 } else {
 389                         if ( cb.sc_private ) return LDAP_SUCCESS;
 390                 }
 391         } else if ( mode == FIND_PRESENT ) {
 392                 return LDAP_SUCCESS;
 393         }
 394
 395         /* If matching CSN was not found, invalidate the context. */
 396         return LDAP_NO_SUCH_OBJECT;
 397 }
 398
 399 /* Queue a persistent search response if still in Refresh stage */
 400 static int
 401 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 402 {
 403         syncres *sr;
 404
 405         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 406                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 407         sr->s_next = NULL;
 408         sr->s_dn.bv_val = (char *)(sr + 1);
 409         sr->s_mode = mode;
 410         sr->s_isreference = opc->sreference;
 411         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 412         *(sr->s_ndn.bv_val++) = '\0';
 413         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 414         *(sr->s_uuid.bv_val++) = '\0';
 415         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 416
 417         if ( !so->s_res ) {
 418                 so->s_res = sr;
 419         } else {
 420                 so->s_restail->s_next = sr;
 421         }
 422         so->s_restail = sr;
 423         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 424         return LDAP_SUCCESS;
 425 }
 426
 427 /* Send a persistent search response */
 428 static int
 429 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 430 {
 431         slap_overinst *on = opc->son;
 432         syncprov_info_t *si = on->on_bi.bi_private;
 433
 434         SlapReply rs = { REP_SEARCH };
 435         LDAPControl *ctrls[2];
 436         struct berval cookie;
 437         Entry e_uuid = {0};
 438         Attribute a_uuid = {0};
 439         Operation sop = *so->s_op;
 440         Opheader ohdr;
 441         syncrepl_state *srs = sop.o_controls[sync_cid];
 442
 443         ohdr = *sop.o_hdr;
 444         sop.o_hdr = &ohdr;
 445         sop.o_tmpmemctx = op->o_tmpmemctx;
 446
 447         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 448                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 449                 if ( so->s_flags & PS_IS_REFRESHING )
 450                         return syncprov_qresp( opc, so, mode );
 451                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 452         }
 453
 454         ctrls[1] = NULL;
 455         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn,
 456                 srs->sr_state.sid, srs->sr_state.rid );
 457
 458         e_uuid.e_attrs = &a_uuid;
 459         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 460         a_uuid.a_nvals = &opc->suuid;
 461         rs.sr_err = slap_build_sync_state_ctrl( &sop, &rs, &e_uuid,
 462                 mode, ctrls, 0, 1, &cookie );
 463
 464         rs.sr_entry = e;
 465         rs.sr_ctrls = ctrls;
 466         switch( mode ) {
 467         case LDAP_SYNC_ADD:
 468                 if ( opc->sreference ) {
 469                         rs.sr_ref = get_entry_referrals( &sop, e );
 470                         send_search_reference( &sop, &rs );
 471                         ber_bvarray_free( rs.sr_ref );
 472                         break;
 473                 }
 474                 /* fallthru */
 475         case LDAP_SYNC_MODIFY:
 476                 rs.sr_attrs = sop.ors_attrs;
 477                 send_search_entry( &sop, &rs );
 478                 break;
 479         case LDAP_SYNC_DELETE:
 480                 e_uuid.e_attrs = NULL;
 481                 e_uuid.e_name = opc->sdn;
 482                 e_uuid.e_nname = opc->sndn;
 483                 rs.sr_entry = &e_uuid;
 484                 if ( opc->sreference ) {
 485                         struct berval bv;
 486                         bv.bv_val = NULL;
 487                         bv.bv_len = 0;
 488                         rs.sr_ref = &bv;
 489                         send_search_reference( &sop, &rs );
 490                 } else {
 491                         send_search_entry( &sop, &rs );
 492                 }
 493                 break;
 494         default:
 495                 assert(0);
 496         }
 497         free( rs.sr_ctrls[0] );
 498         return rs.sr_err;
 499 }
 500
 501 static void
 502 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 503 {
 504         slap_overinst *on = opc->son;
 505         syncprov_info_t         *si = on->on_bi.bi_private;
 506
 507         fbase_cookie fc;
 508         syncops *ss;
 509         Entry *e;
 510         Attribute *a;
 511         int rc;
 512         struct berval newdn;
 513
 514         fc.fdn = &op->o_req_ndn;
 515         /* compute new DN */
 516         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 517                 struct berval pdn;
 518                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 519                 else dnParent( fc.fdn, &pdn );
 520                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 521                 fc.fdn = &newdn;
 522         }
 523         if ( op->o_tag != LDAP_REQ_ADD ) {
 524                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 525                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 526                 op->o_bd->bd_info = (BackendInfo *)on;
 527                 if ( rc ) return;
 528         } else {
 529                 e = op->ora_e;
 530         }
 531
 532         if ( saveit ) {
 533                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 534                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 535                 opc->sreference = is_entry_referral( e );
 536         }
 537         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 538                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 539                 if ( a )
 540                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 541         }
 542
 543         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 544         for (ss = si->si_ops; ss; ss=ss->s_next)
 545         {
 546                 syncmatches *sm;
 547                 int found = 0;
 548
 549                 /* validate base */
 550                 fc.fss = ss;
 551                 fc.fbase = 0;
 552                 fc.fscope = 0;
 553                 rc = syncprov_findbase( op, &fc );
 554                 if ( rc != LDAP_SUCCESS ) continue;
 555
 556                 /* If we're sending results now, look for this op in old matches */
 557                 if ( !saveit ) {
 558                         syncmatches *old;
 559                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 560                                 old=sm, sm=sm->sm_next ) {
 561                                 if ( sm->sm_op == ss ) {
 562                                         found = 1;
 563                                         old->sm_next = sm->sm_next;
 564                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 565                                         break;
 566                                 }
 567                         }
 568                 }
 569
 570                 /* check if current o_req_dn is in scope and matches filter */
 571                 if ( fc.fscope && test_filter( op, e, ss->s_filter ) ==
 572                         LDAP_COMPARE_TRUE ) {
 573                         if ( saveit ) {
 574                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 575                                 sm->sm_next = opc->smatches;
 576                                 sm->sm_op = ss;
 577                                 opc->smatches = sm;
 578                         } else {
 579                                 /* if found send UPDATE else send ADD */
 580                                 syncprov_sendresp( op, opc, ss, e,
 581                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 582                         }
 583                 } else if ( !saveit && found ) {
 584                         /* send DELETE */
 585                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 586                 }
 587         }
 588         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 589         if ( op->o_tag != LDAP_REQ_ADD ) {
 590                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 591                 be_entry_release_r( op, e );
 592                 op->o_bd->bd_info = (BackendInfo *)on;
 593         }
 594 }
 595
 596 static int
 597 syncprov_op_cleanup( Operation *op, SlapReply *rs )
 598 {
 599         slap_callback *cb = op->o_callback;
 600         opcookie *opc = cb->sc_private;
 601         syncmatches *sm, *snext;
 602
 603         for (sm = opc->smatches; sm; sm=snext) {
 604                 snext = sm->sm_next;
 605                 op->o_tmpfree( sm, op->o_tmpmemctx );
 606         }
 607         op->o_callback = cb->sc_next;
 608         op->o_tmpfree(cb, op->o_tmpmemctx);
 609 }
 610
 611 static int
 612 syncprov_op_response( Operation *op, SlapReply *rs )
 613 {
 614         opcookie *opc = op->o_callback->sc_private;
 615         slap_overinst *on = opc->son;
 616         syncprov_info_t         *si = on->on_bi.bi_private;
 617         syncmatches *sm;
 618
 619         if ( rs->sr_err == LDAP_SUCCESS )
 620         {
 621                 struct berval maxcsn;
 622                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 623
 624                 cbuf[0] = '\0';
 625                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
 626                 slap_get_commit_csn( op, &maxcsn );
 627                 if ( maxcsn.bv_val ) {
 628                         strcpy( cbuf, maxcsn.bv_val );
 629                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
 630                                 strcpy( si->si_ctxcsnbuf, cbuf );
 631                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
 632                         }
 633                         si->si_gotcsn = 1;
 634                 }
 635                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 636
 637                 opc->sctxcsn.bv_len = maxcsn.bv_len;
 638                 opc->sctxcsn.bv_val = cbuf;
 639
 640                 if ( si->si_ops ) {
 641                         switch(op->o_tag) {
 642                         case LDAP_REQ_ADD:
 643                         case LDAP_REQ_MODIFY:
 644                         case LDAP_REQ_MODRDN:
 645                         case LDAP_REQ_EXTENDED:
 646                                 syncprov_matchops( op, opc, 0 );
 647                                 break;
 648                         case LDAP_REQ_DELETE:
 649                                 /* for each match in opc->smatches:
 650                                  *   send DELETE msg
 651                                  */
 652                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
 653                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
 654                                                 LDAP_SYNC_DELETE, 1 );
 655                                 }
 656                                 break;
 657                         }
 658                 }
 659
 660         }
 661         return SLAP_CB_CONTINUE;
 662 }
 663
 664 #if 0
 665 static int
 666 syncprov_op_compare( Operation *op, SlapReply *rs )
 667 {
 668         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 669         syncprov_info_t         *si = on->on_bi.bi_private;
 670         int rc = SLAP_CB_CONTINUE;
 671
 672         if ( dn_match( &op->o_req_ndn, &si->si_e->e_nname ) )
 673         {
 674                 Attribute *a;
 675
 676                 ldap_pvt_thread_mutex_lock( &si->si_e_mutex );
 677
 678                 if ( get_assert( op ) &&
 679                         ( test_filter( op, si->si_e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
 680                 {
 681                         rs->sr_err = LDAP_ASSERTION_FAILED;
 682                         goto return_results;
 683                 }
 684
 685                 rs->sr_err = access_allowed( op, si->si_e, op->oq_compare.rs_ava->aa_desc,
 686                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
 687                 if ( ! rs->sr_err ) {
 688                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 689                         goto return_results;
 690                 }
 691
 692                 rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
 693
 694                 for ( a = attr_find( si->si_e->e_attrs, op->oq_compare.rs_ava->aa_desc );
 695                         a != NULL;
 696                         a = attr_find( a->a_next, op->oq_compare.rs_ava->aa_desc ) )
 697                 {
 698                         rs->sr_err = LDAP_COMPARE_FALSE;
 699
 700                         if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
 701                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 702                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 703                                 a->a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
 704                         {
 705                                 rs->sr_err = LDAP_COMPARE_TRUE;
 706                                 break;
 707                         }
 708                 }
 709
 710 return_results:;
 711
 712                 ldap_pvt_thread_mutex_unlock( &si->si_e_mutex );
 713
 714                 send_ldap_result( op, rs );
 715
 716                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
 717                         rs->sr_err = LDAP_SUCCESS;
 718                 }
 719                 rc = rs->sr_err;
 720         }
 721
 722         return SLAP_CB_CONTINUE;
 723 }
 724 #endif
 725
 726 static int
 727 syncprov_op_mod( Operation *op, SlapReply *rs )
 728 {
 729         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 730         syncprov_info_t         *si = on->on_bi.bi_private;
 731
 732         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(opcookie), op->o_tmpmemctx);
 733         opcookie *opc = (opcookie *)(cb+1);
 734         opc->son = on;
 735         cb->sc_response = syncprov_op_response;
 736         cb->sc_cleanup = syncprov_op_cleanup;
 737         cb->sc_private = opc;
 738         cb->sc_next = op->o_callback;
 739         op->o_callback = cb;
 740
 741         if ( si->si_ops && op->o_tag != LDAP_REQ_ADD )
 742                 syncprov_matchops( op, opc, 1 );
 743
 744         return SLAP_CB_CONTINUE;
 745 }
 746
 747 static int
 748 syncprov_op_extended( Operation *op, SlapReply *rs )
 749 {
 750         if ( exop_is_write( op ))
 751                 return syncprov_op_mod( op, rs );
 752
 753         return SLAP_CB_CONTINUE;
 754 }
 755
 756 typedef struct searchstate {
 757         slap_overinst *ss_on;
 758         syncops *ss_so;
 759         int ss_done;
 760 } searchstate;
 761
 762 static int
 763 syncprov_search_cleanup( Operation *op, SlapReply *rs )
 764 {
 765         searchstate *ss = op->o_callback->sc_private;
 766         if ( rs->sr_ctrls ) {
 767                 free( rs->sr_ctrls[0] );
 768                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 769         }
 770         if ( ss->ss_done )
 771                 op->o_sync_mode |= SLAP_SYNC_REFRESH_AND_PERSIST;
 772         return 0;
 773 }
 774
 775 static int
 776 syncprov_search_response( Operation *op, SlapReply *rs )
 777 {
 778         searchstate *ss = op->o_callback->sc_private;
 779         slap_overinst *on = ss->ss_on;
 780         syncprov_info_t         *si = on->on_bi.bi_private;
 781         syncrepl_state *srs = op->o_controls[sync_cid];
 782
 783         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
 784                 int i;
 785                 if ( srs->sr_state.ctxcsn ) {
 786                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
 787                                 slap_schema.si_ad_entryCSN );
 788                         /* Don't send the ctx entry twice */
 789                         if ( bvmatch( &a->a_nvals[0], srs->sr_state.ctxcsn ))
 790                                 return LDAP_SUCCESS;
 791                 }
 792                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
 793                         op->o_tmpmemctx );
 794                 rs->sr_ctrls[1] = NULL;
 795                 rs->sr_err = slap_build_sync_state_ctrl( op, rs, rs->sr_entry,
 796                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
 797         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
 798                 struct berval cookie;
 799
 800                 slap_compose_sync_cookie( op, &cookie,
 801                         &op->ors_filter->f_and->f_ava->aa_value,
 802                         srs->sr_state.sid, srs->sr_state.rid );
 803
 804                 /* Is this a regular refresh? */
 805                 if ( !ss->ss_so ) {
 806                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
 807                                 op->o_tmpmemctx );
 808                         rs->sr_ctrls[1] = NULL;
 809                         rs->sr_err = slap_build_sync_done_ctrl( op, rs, rs->sr_ctrls,
 810                                 0, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
 811                 } else {
 812                         int locked = 0;
 813                 /* It's RefreshAndPersist, transition to Persist phase */
 814                         rs->sr_rspoid = LDAP_SYNC_INFO;
 815                         slap_send_syncinfo( op, rs, rs->sr_nentries ?
 816                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
 817                                 &cookie, 1, NULL, 0 );
 818                         /* Flush any queued persist messages */
 819                         if ( ss->ss_so->s_res ) {
 820                                 syncres *sr, *srnext;
 821                                 Entry *e;
 822                                 opcookie opc;
 823
 824                                 opc.son = on;
 825                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
 826                                 locked = 1;
 827                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
 828                                         int rc = LDAP_SUCCESS;
 829                                         srnext = sr->s_next;
 830                                         opc.sdn = sr->s_dn;
 831                                         opc.sndn = sr->s_ndn;
 832                                         opc.suuid = sr->s_uuid;
 833                                         opc.sctxcsn = sr->s_csn;
 834                                         opc.sreference = sr->s_isreference;
 835                                         e = NULL;
 836
 837                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
 838                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 839                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
 840                                                 op->o_bd->bd_info = (BackendInfo *)on;
 841                                         }
 842                                         if ( rc == LDAP_SUCCESS )
 843                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
 844                                                         sr->s_mode, 0 );
 845
 846                                         if ( e ) {
 847                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 848                                                 be_entry_release_r( op, e );
 849                                                 op->o_bd->bd_info = (BackendInfo *)on;
 850                                         }
 851                                         ch_free( sr );
 852                                 }
 853                                 ss->ss_so->s_res = NULL;
 854                                 ss->ss_so->s_restail = NULL;
 855                         }
 856
 857                         /* Turn off the refreshing flag */
 858                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
 859                         if ( locked )
 860                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
 861
 862                         /* Detach this Op from frontend control */
 863                                 ss->ss_done = 1;
 864                                 ;
 865
 866                         return LDAP_SUCCESS;
 867                 }
 868         }
 869
 870         return SLAP_CB_CONTINUE;
 871 }
 872
 873 static int
 874 syncprov_op_search( Operation *op, SlapReply *rs )
 875 {
 876         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 877         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
 878         slap_callback   *cb;
 879         int gotstate = 0, nochange = 0;
 880         Filter *fand, *fava;
 881         syncops *sop = NULL;
 882         searchstate *ss;
 883         syncrepl_state *srs;
 884
 885         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
 886
 887         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
 888                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
 889                 return rs->sr_err;
 890         }
 891
 892         srs = op->o_controls[sync_cid];
 893
 894         /* If this is a persistent search, set it up right away */
 895         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
 896                 syncops so;
 897                 fbase_cookie fc;
 898                 opcookie opc;
 899                 slap_callback sc;
 900
 901                 fc.fss = &so;
 902                 fc.fbase = 0;
 903                 so.s_eid = NOID;
 904                 so.s_op = op;
 905                 so.s_flags = PS_IS_REFRESHING;
 906                 /* syncprov_findbase expects to be called as a callback... */
 907                 sc.sc_private = &opc;
 908                 opc.son = on;
 909                 cb = op->o_callback;
 910                 op->o_callback = &sc;
 911                 rs->sr_err = syncprov_findbase( op, &fc );
 912                 op->o_callback = cb;
 913
 914                 if ( rs->sr_err != LDAP_SUCCESS ) {
 915                         send_ldap_result( op, rs );
 916                         return rs->sr_err;
 917                 }
 918                 sop = ch_malloc( sizeof( syncops ));
 919                 *sop = so;
 920                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
 921                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 922                 sop->s_next = si->si_ops;
 923                 si->si_ops = sop;
 924                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 925         }
 926
 927         /* If we have a cookie, handle the PRESENT lookups
 928          */
 929         if ( srs->sr_state.ctxcsn ) {
 930                 /* Is the CSN in a valid format? */
 931                 if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 932                         send_ldap_error( op, rs, LDAP_OTHER, "invalid sync cookie" );
 933                         return rs->sr_err;
 934                 }
 935                 /* Is the CSN still present in the database? */
 936                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
 937                         /* No, so a reload is required */
 938 #if 0           /* the consumer doesn't seem to send this hint */
 939                         if ( op->o_sync_rhint == 0 ) {
 940                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
 941                                 return rs->sr_err;
 942                         }
 943 #endif
 944                 } else {
 945                         gotstate = 1;
 946                         /* If just Refreshing and nothing has changed, shortcut it */
 947                         if ( bvmatch( srs->sr_state.ctxcsn, &si->si_ctxcsn )) {
 948                                 nochange = 1;
 949                                 if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
 950                                         LDAPControl     *ctrls[2];
 951
 952                                         ctrls[0] = NULL;
 953                                         ctrls[1] = NULL;
 954                                         slap_build_sync_done_ctrl( op, rs, ctrls, 0, 0,
 955                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
 956                                         rs->sr_ctrls = ctrls;
 957                                         rs->sr_err = LDAP_SUCCESS;
 958                                         send_ldap_result( op, rs );
 959                                         return rs->sr_err;
 960                                 }
 961                                 goto shortcut;
 962                         } else
 963                         /* If context has changed, check for Present UUIDs */
 964                         if ( syncprov_findcsn( op, FIND_PRESENT ) != LDAP_SUCCESS ) {
 965                                 send_ldap_result( op, rs );
 966                                 return rs->sr_err;
 967                         }
 968                 }
 969         }
 970
 971         /* If we didn't get a cookie and we don't know our contextcsn, try to
 972          * find it anyway.
 973          */
 974         if ( !gotstate && !si->si_gotcsn ) {
 975                 struct berval bv = BER_BVC("1"), *old;
 976
 977                 old = srs->sr_state.ctxcsn;
 978                 srs->sr_state.ctxcsn = &bv;
 979                 syncprov_findcsn( op, FIND_CSN );
 980                 srs->sr_state.ctxcsn = old;
 981         }
 982
 983         /* Append CSN range to search filter, save original filter
 984          * for persistent search evaluation
 985          */
 986         if ( sop ) {
 987                 sop->s_filter = op->ors_filter;
 988         }
 989
 990         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 991         fand->f_choice = LDAP_FILTER_AND;
 992         fand->f_next = NULL;
 993         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
 994         fava->f_choice = LDAP_FILTER_LE;
 995         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
 996         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
 997         ber_dupbv_x( &fava->f_ava->aa_value, &si->si_ctxcsn, op->o_tmpmemctx );
 998         fand->f_and = fava;
 999         if ( gotstate ) {
1000                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1001                 fava = fava->f_next;
1002                 fava->f_choice = LDAP_FILTER_GE;
1003                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1004                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1005                 ber_dupbv_x( &fava->f_ava->aa_value, srs->sr_state.ctxcsn, op->o_tmpmemctx );
1006         }
1007         fava->f_next = op->ors_filter;
1008         op->ors_filter = fand;
1009         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1010
1011 shortcut:
1012         /* Let our callback add needed info to returned entries */
1013         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1014         ss = (searchstate *)(cb+1);
1015         ss->ss_on = on;
1016         ss->ss_so = sop;
1017         ss->ss_done = 0;
1018         cb->sc_response = syncprov_search_response;
1019         cb->sc_cleanup = syncprov_search_cleanup;
1020         cb->sc_private = ss;
1021         cb->sc_next = op->o_callback;
1022         op->o_callback = cb;
1023
1024         /* FIXME: temporary hack to make sure back-bdb's native Psearch handling
1025          * doesn't get invoked. We can skip this after the back-bdb code is
1026          * removed, and also delete ss->ss_done.
1027          */
1028         op->o_sync_mode &= SLAP_CONTROL_MASK;
1029
1030         /* If this is a persistent search and no changes were reported during
1031          * the refresh phase, just invoke the response callback to transition
1032          * us into persist phase
1033          */
1034         if ( nochange ) {
1035                 rs->sr_err = LDAP_SUCCESS;
1036                 rs->sr_nentries = 0;
1037                 send_ldap_result( op, rs );
1038                 return rs->sr_err;
1039         }
1040         return SLAP_CB_CONTINUE;
1041 }
1042
1043 static int
1044 syncprov_db_config(
1045         BackendDB       *be,
1046         const char      *fname,
1047         int             lineno,
1048         int             argc,
1049         char    **argv
1050 )
1051 {
1052         slap_overinst           *on = (slap_overinst *)be->bd_info;
1053         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1054
1055 #if 0
1056         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1057                 if ( argc != 3 ) {
1058                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1059                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1060                         return -1;
1061                 }
1062                 si->si_chkops = atoi( argv[1] );
1063                 si->si_chktime = atoi( argv[2] ) * 60;
1064
1065         } else {
1066                 return SLAP_CONF_UNKNOWN;
1067         }
1068 #endif
1069
1070         return SLAP_CONF_UNKNOWN;
1071 }
1072
1073 static int
1074 syncprov_db_init(
1075         BackendDB *be
1076 )
1077 {
1078         slap_overinst   *on = (slap_overinst *)be->bd_info;
1079         syncprov_info_t *si;
1080
1081         si = ch_calloc(1, sizeof(syncprov_info_t));
1082         on->on_bi.bi_private = si;
1083         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
1084         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
1085         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
1086
1087         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
1088         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
1089
1090         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
1091         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
1092
1093         sync_cid = slap_cids.sc_LDAPsync;
1094
1095         return 0;
1096 }
1097
1098 static int
1099 syncprov_db_destroy(
1100         BackendDB *be
1101 )
1102 {
1103         slap_overinst   *on = (slap_overinst *)be->bd_info;
1104         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1105
1106         if ( si ) {
1107                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
1108                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
1109                 ch_free( si );
1110         }
1111
1112         return 0;
1113 }
1114
1115 /* This overlay is set up for dynamic loading via moduleload. For static
1116  * configuration, you'll need to arrange for the slap_overinst to be
1117  * initialized and registered by some other function inside slapd.
1118  */
1119
1120 static slap_overinst            syncprov;
1121
1122 int
1123 syncprov_init()
1124 {
1125         syncprov.on_bi.bi_type = "syncprov";
1126         syncprov.on_bi.bi_db_init = syncprov_db_init;
1127         syncprov.on_bi.bi_db_config = syncprov_db_config;
1128         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
1129
1130         syncprov.on_bi.bi_op_add = syncprov_op_mod;
1131 #if 0
1132         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
1133 #endif
1134         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
1135         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
1136         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
1137         syncprov.on_bi.bi_op_search = syncprov_op_search;
1138         syncprov.on_bi.bi_extended = syncprov_op_extended;
1139
1140 #if 0
1141         syncprov.on_response = syncprov_response;
1142 #endif
1143
1144         return overlay_register( &syncprov );
1145 }
1146
1147 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
1148 int
1149 init_module( int argc, char *argv[] )
1150 {
1151         return syncprov_init();
1152 }
1153 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
1154
1155 #endif /* defined(SLAPD_OVER_SYNCPROV) */