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         long    s_sid;
  46         long    s_rid;
  47         struct berval s_filterstr;
  48         int             s_flags;        /* search status */
  49         struct syncres *s_res;
  50         struct syncres *s_restail;
  51         ldap_pvt_thread_mutex_t s_mutex;
  52 } syncops;
  53
  54 static int      sync_cid;
  55
  56 #define PS_IS_REFRESHING        0x01
  57
  58 /* Record of which searches matched at premodify step */
  59 typedef struct syncmatches {
  60         struct syncmatches *sm_next;
  61         syncops *sm_op;
  62 } syncmatches;
  63
  64 typedef struct syncprov_info_t {
  65         syncops         *si_ops;
  66         struct berval   si_ctxcsn;      /* ldapsync context */
  67         int             si_gotcsn;      /* is our ctxcsn up to date? */
  68         ldap_pvt_thread_mutex_t si_csn_mutex;
  69         ldap_pvt_thread_mutex_t si_ops_mutex;
  70         char            si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
  71 } syncprov_info_t;
  72
  73 typedef struct opcookie {
  74         slap_overinst *son;
  75         syncmatches *smatches;
  76         struct berval sdn;      /* DN of entry, for deletes */
  77         struct berval sndn;
  78         struct berval suuid;    /* UUID of entry */
  79         struct berval sctxcsn;
  80         int sreference; /* Is the entry a reference? */
  81 } opcookie;
  82
  83 typedef struct fbase_cookie {
  84         struct berval *fdn;     /* DN of a modified entry, for scope testing */
  85         syncops *fss;   /* persistent search we're testing against */
  86         int fbase;      /* if TRUE we found the search base and it's still valid */
  87         int fscope;     /* if TRUE then fdn is within the psearch scope */
  88 } fbase_cookie;
  89
  90 static AttributeName csn_anlist[2];
  91 static AttributeName uuid_anlist[2];
  92
  93 /* syncprov_findbase:
  94  *   finds the true DN of the base of a search (with alias dereferencing) and
  95  * checks to make sure the base entry doesn't get replaced with a different
  96  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
  97  * change is detected, any persistent search on this base must be terminated /
  98  * reloaded.
  99  *   On the first call, we just save the DN and entryID. On subsequent calls
 100  * we compare the DN and entryID with the saved values.
 101  */
 102 static int
 103 findbase_cb( Operation *op, SlapReply *rs )
 104 {
 105         slap_callback *sc = op->o_callback;
 106
 107         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 108                 fbase_cookie *fc = sc->sc_private;
 109
 110                 /* If no entryID, we're looking for the first time.
 111                  * Just store whatever we got.
 112                  */
 113                 if ( fc->fss->s_eid == NOID ) {
 114                         fc->fbase = 1;
 115                         fc->fss->s_eid = rs->sr_entry->e_id;
 116                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 117
 118                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 119                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 120
 121                 /* OK, the DN is the same and the entryID is the same. Now
 122                  * see if the fdn resides in the scope.
 123                  */
 124                         fc->fbase = 1;
 125                         switch ( fc->fss->s_op->ors_scope ) {
 126                         case LDAP_SCOPE_BASE:
 127                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 128                                 break;
 129                         case LDAP_SCOPE_ONELEVEL: {
 130                                 struct berval pdn;
 131                                 dnParent( fc->fdn, &pdn );
 132                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 133                                 break; }
 134                         case LDAP_SCOPE_SUBTREE:
 135                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 136                                 break;
 137 #ifdef LDAP_SCOPE_SUBORDINATE
 138                         case LDAP_SCOPE_SUBORDINATE:
 139                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 140                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 141                                 break;
 142 #endif
 143                         }
 144                 }
 145         }
 146         return LDAP_SUCCESS;
 147 }
 148
 149 static int
 150 syncprov_findbase( Operation *op, fbase_cookie *fc )
 151 {
 152         opcookie *opc = op->o_callback->sc_private;
 153         slap_overinst *on = opc->son;
 154         syncprov_info_t         *si = on->on_bi.bi_private;
 155
 156         slap_callback cb = {0};
 157         Operation fop;
 158         SlapReply frs = { REP_RESULT };
 159         int rc;
 160
 161         fop = *op;
 162
 163         cb.sc_response = findbase_cb;
 164         cb.sc_private = fc;
 165
 166         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 167         fop.o_callback = &cb;
 168         fop.o_tag = LDAP_REQ_SEARCH;
 169         fop.ors_scope = LDAP_SCOPE_BASE;
 170         fop.ors_deref = fc->fss->s_op->ors_deref;
 171         fop.ors_slimit = 1;
 172         fop.ors_tlimit = SLAP_NO_LIMIT;
 173         fop.ors_attrs = slap_anlist_no_attrs;
 174         fop.ors_attrsonly = 1;
 175         fop.ors_filter = fc->fss->s_op->ors_filter;
 176         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 177
 178         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 179
 180         fop.o_bd->bd_info = on->on_info->oi_orig;
 181         rc = fop.o_bd->be_search( &fop, &frs );
 182         fop.o_bd->bd_info = (BackendInfo *)on;
 183
 184         if ( fc->fbase ) return LDAP_SUCCESS;
 185
 186         /* If entryID has changed, then the base of this search has
 187          * changed. Invalidate the psearch.
 188          */
 189         return LDAP_NO_SUCH_OBJECT;
 190 }
 191
 192 /* syncprov_findcsn:
 193  *   This function has three different purposes, but they all use a search
 194  * that filters on entryCSN so they're combined here.
 195  * 1: when the current contextCSN is unknown (i.e., at server start time)
 196  * and a syncrepl search has arrived with a cookie, we search for all entries
 197  * with CSN >= the cookie CSN, and store the maximum as our contextCSN. Also,
 198  * we expect to find the cookie CSN in the search results, and note if we did
 199  * or not. If not, we assume the cookie is stale. (This may be too restrictive,
 200  * notice case 2.)
 201  *
 202  * 2: when the current contextCSN is known and we have a sync cookie, we search
 203  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 204  * entry is found, the cookie CSN is valid, otherwise it is stale. Case 1 is
 205  * considered a special case of case 2, and both are generally called the
 206  * "find CSN" task.
 207  *
 208  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 209  * CSN, and generate Present records for them. We always collect this result
 210  * in SyncID sets, even if there's only one match.
 211  */
 212 #define FIND_CSN        1
 213 #define FIND_PRESENT    2
 214
 215 typedef struct fcsn_cookie {
 216         struct berval maxcsn;
 217         int gotmatch;
 218 } fcsn_cookie;
 219
 220 static int
 221 findcsn_cb( Operation *op, SlapReply *rs )
 222 {
 223         slap_callback *sc = op->o_callback;
 224
 225         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 226                 /* If the private pointer is set, it points to an fcsn_cookie
 227                  * and we want to record the maxcsn and match state.
 228                  */
 229                 if ( sc->sc_private ) {
 230                         int i;
 231                         fcsn_cookie *fc = sc->sc_private;
 232                         syncrepl_state *srs = op->o_controls[sync_cid];
 233                         Attribute *a = attr_find(rs->sr_entry->e_attrs,
 234                                 slap_schema.si_ad_entryCSN );
 235                         i = ber_bvcmp( &a->a_vals[0], srs->sr_state.ctxcsn );
 236                         if ( i == 0 ) fc->gotmatch = 1;
 237                         i = ber_bvcmp( &a->a_vals[0], &fc->maxcsn );
 238                         if ( i > 0 ) {
 239                                 fc->maxcsn.bv_len = a->a_vals[0].bv_len;
 240                                 strcpy(fc->maxcsn.bv_val, a->a_vals[0].bv_val );
 241                         }
 242                 } else {
 243                 /* Otherwise, if the private pointer is not set, we just
 244                  * want to know if any entry matched the filter.
 245                  */
 246                         sc->sc_private = (void *)1;
 247                 }
 248         }
 249         return LDAP_SUCCESS;
 250 }
 251
 252 /* Build a list of entryUUIDs for sending in a SyncID set */
 253
 254 typedef struct fpres_cookie {
 255         int num;
 256         BerVarray uuids;
 257 } fpres_cookie;
 258
 259 static int
 260 findpres_cb( Operation *op, SlapReply *rs )
 261 {
 262         slap_callback *sc = op->o_callback;
 263         fpres_cookie *pc = sc->sc_private;
 264         int ret = SLAP_CB_CONTINUE;
 265
 266         if ( rs->sr_type == REP_SEARCH ) {
 267                 ret = slap_build_syncUUID_set( op, &pc->uuids, rs->sr_entry );
 268                 if ( ret > 0 ) {
 269                         pc->num++;
 270                         ret = LDAP_SUCCESS;
 271                         if ( pc->num == SLAP_SYNCUUID_SET_SIZE ) {
 272                                 rs->sr_rspoid = LDAP_SYNC_INFO;
 273                                 ret = slap_send_syncinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 274                                         0, pc->uuids, 0 );
 275                                 ber_bvarray_free_x( pc->uuids, op->o_tmpmemctx );
 276                                 pc->uuids = NULL;
 277                                 pc->num = 0;
 278                         }
 279                 } else {
 280                         ret = LDAP_OTHER;
 281                 }
 282         } else if ( rs->sr_type == REP_RESULT ) {
 283                 ret = rs->sr_err;
 284                 if ( pc->num ) {
 285                         rs->sr_rspoid = LDAP_SYNC_INFO;
 286                         ret = slap_send_syncinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 287                                 0, pc->uuids, 0 );
 288                         ber_bvarray_free_x( pc->uuids, op->o_tmpmemctx );
 289                         pc->uuids = NULL;
 290                         pc->num = 0;
 291                 }
 292         }
 293         return ret;
 294 }
 295
 296
 297 static int
 298 syncprov_findcsn( Operation *op, int mode )
 299 {
 300         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 301         syncprov_info_t         *si = on->on_bi.bi_private;
 302
 303         slap_callback cb = {0};
 304         Operation fop;
 305         SlapReply frs = { REP_RESULT };
 306         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 307         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 308         struct berval fbuf;
 309         Filter cf;
 310         AttributeAssertion eq;
 311         int rc;
 312         fcsn_cookie fcookie;
 313         fpres_cookie pcookie;
 314         int locked = 0;
 315         syncrepl_state *srs = op->o_controls[sync_cid];
 316
 317         if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 318                 return LDAP_OTHER;
 319         }
 320
 321         fop = *op;
 322         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 323
 324         fbuf.bv_val = buf;
 325         if ( mode == FIND_CSN ) {
 326                 if ( !si->si_gotcsn ) {
 327                         /* If we don't know the current ctxcsn, find it */
 328                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
 329                         locked = 1;
 330                 }
 331                 if ( !si->si_gotcsn ) {
 332                         cf.f_choice = LDAP_FILTER_GE;
 333                         fop.ors_attrsonly = 0;
 334                         fop.ors_attrs = csn_anlist;
 335                         fop.ors_slimit = SLAP_NO_LIMIT;
 336                         cb.sc_private = &fcookie;
 337                         fcookie.maxcsn.bv_val = cbuf;
 338                         fcookie.maxcsn.bv_len = 0;
 339                         fcookie.gotmatch = 0;
 340                         fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)", srs->sr_state.ctxcsn->bv_val );
 341                 } else {
 342                         if ( locked ) {
 343                                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 344                                 locked = 0;
 345                         }
 346                         cf.f_choice = LDAP_FILTER_LE;
 347                         fop.ors_attrsonly = 1;
 348                         fop.ors_attrs = slap_anlist_no_attrs;
 349                         fop.ors_slimit = 1;
 350                         cb.sc_private = NULL;
 351                         fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)", srs->sr_state.ctxcsn->bv_val );
 352                 }
 353                 cb.sc_response = findcsn_cb;
 354
 355         } else if ( mode == FIND_PRESENT ) {
 356                 cf.f_choice = LDAP_FILTER_LE;
 357                 fop.ors_attrsonly = 0;
 358                 fop.ors_attrs = uuid_anlist;
 359                 fop.ors_slimit = SLAP_NO_LIMIT;
 360                 /* We want pure entries, not referrals */
 361                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 362                 cb.sc_private = &pcookie;
 363                 cb.sc_response = findpres_cb;
 364                 pcookie.num = 0;
 365                 pcookie.uuids = NULL;
 366                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)", srs->sr_state.ctxcsn->bv_val );
 367         }
 368         cf.f_ava = &eq;
 369         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 370         cf.f_av_value = *srs->sr_state.ctxcsn;
 371         cf.f_next = NULL;
 372
 373         fop.o_callback = &cb;
 374         fop.ors_tlimit = SLAP_NO_LIMIT;
 375         fop.ors_filter = &cf;
 376         fop.ors_filterstr = fbuf;
 377
 378         fop.o_bd->bd_info = on->on_info->oi_orig;
 379         rc = fop.o_bd->be_search( &fop, &frs );
 380         fop.o_bd->bd_info = (BackendInfo *)on;
 381
 382         if ( mode == FIND_CSN ) {
 383                 if ( !si->si_gotcsn ) {
 384                         strcpy(si->si_ctxcsnbuf, fcookie.maxcsn.bv_val);
 385                         si->si_ctxcsn.bv_len = fcookie.maxcsn.bv_len;
 386                         si->si_gotcsn = 1;
 387                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 388                         if ( fcookie.gotmatch ) return LDAP_SUCCESS;
 389
 390                 } else {
 391                         if ( cb.sc_private ) return LDAP_SUCCESS;
 392                 }
 393         } else if ( mode == FIND_PRESENT ) {
 394                 return LDAP_SUCCESS;
 395         }
 396
 397         /* If matching CSN was not found, invalidate the context. */
 398         return LDAP_NO_SUCH_OBJECT;
 399 }
 400
 401 /* Queue a persistent search response if still in Refresh stage */
 402 static int
 403 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 404 {
 405         syncres *sr;
 406
 407         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 408                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 409         sr->s_next = NULL;
 410         sr->s_dn.bv_val = (char *)(sr + 1);
 411         sr->s_mode = mode;
 412         sr->s_isreference = opc->sreference;
 413         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 414         *(sr->s_ndn.bv_val++) = '\0';
 415         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 416         *(sr->s_uuid.bv_val++) = '\0';
 417         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 418
 419         if ( !so->s_res ) {
 420                 so->s_res = sr;
 421         } else {
 422                 so->s_restail->s_next = sr;
 423         }
 424         so->s_restail = sr;
 425         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 426         return LDAP_SUCCESS;
 427 }
 428
 429 /* Send a persistent search response */
 430 static int
 431 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 432 {
 433         slap_overinst *on = opc->son;
 434         syncprov_info_t *si = on->on_bi.bi_private;
 435
 436         SlapReply rs = { REP_SEARCH };
 437         LDAPControl *ctrls[2];
 438         struct berval cookie;
 439         Entry e_uuid = {0};
 440         Attribute a_uuid = {0};
 441         Operation sop = *so->s_op;
 442         Opheader ohdr;
 443
 444         ohdr = *sop.o_hdr;
 445         sop.o_hdr = &ohdr;
 446         sop.o_tmpmemctx = op->o_tmpmemctx;
 447         sop.o_bd = op->o_bd;
 448         sop.o_controls = op->o_controls;
 449
 450         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 451                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 452                 if ( so->s_flags & PS_IS_REFRESHING )
 453                         return syncprov_qresp( opc, so, mode );
 454                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 455         }
 456
 457         ctrls[1] = NULL;
 458         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn,
 459                 so->s_sid, so->s_rid );
 460
 461         e_uuid.e_attrs = &a_uuid;
 462         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 463         a_uuid.a_nvals = &opc->suuid;
 464         rs.sr_err = slap_build_sync_state_ctrl( &sop, &rs, &e_uuid,
 465                 mode, ctrls, 0, 1, &cookie );
 466
 467         rs.sr_entry = e;
 468         rs.sr_ctrls = ctrls;
 469         switch( mode ) {
 470         case LDAP_SYNC_ADD:
 471                 if ( opc->sreference ) {
 472                         rs.sr_ref = get_entry_referrals( &sop, e );
 473                         send_search_reference( &sop, &rs );
 474                         ber_bvarray_free( rs.sr_ref );
 475                         break;
 476                 }
 477                 /* fallthru */
 478         case LDAP_SYNC_MODIFY:
 479                 rs.sr_attrs = sop.ors_attrs;
 480                 send_search_entry( &sop, &rs );
 481                 break;
 482         case LDAP_SYNC_DELETE:
 483                 e_uuid.e_attrs = NULL;
 484                 e_uuid.e_name = opc->sdn;
 485                 e_uuid.e_nname = opc->sndn;
 486                 rs.sr_entry = &e_uuid;
 487                 if ( opc->sreference ) {
 488                         struct berval bv;
 489                         bv.bv_val = NULL;
 490                         bv.bv_len = 0;
 491                         rs.sr_ref = &bv;
 492                         send_search_reference( &sop, &rs );
 493                 } else {
 494                         send_search_entry( &sop, &rs );
 495                 }
 496                 break;
 497         default:
 498                 assert(0);
 499         }
 500         free( rs.sr_ctrls[0] );
 501         return rs.sr_err;
 502 }
 503
 504 static void
 505 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 506 {
 507         slap_overinst *on = opc->son;
 508         syncprov_info_t         *si = on->on_bi.bi_private;
 509
 510         fbase_cookie fc;
 511         syncops *ss;
 512         Entry *e;
 513         Attribute *a;
 514         int rc;
 515         struct berval newdn;
 516
 517         fc.fdn = &op->o_req_ndn;
 518         /* compute new DN */
 519         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 520                 struct berval pdn;
 521                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 522                 else dnParent( fc.fdn, &pdn );
 523                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 524                 fc.fdn = &newdn;
 525         }
 526         if ( op->o_tag != LDAP_REQ_ADD ) {
 527                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 528                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 529                 op->o_bd->bd_info = (BackendInfo *)on;
 530                 if ( rc ) return;
 531         } else {
 532                 e = op->ora_e;
 533         }
 534
 535         if ( saveit ) {
 536                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 537                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 538                 opc->sreference = is_entry_referral( e );
 539         }
 540         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 541                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 542                 if ( a )
 543                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 544         }
 545
 546         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 547         for (ss = si->si_ops; ss; ss=ss->s_next)
 548         {
 549                 syncmatches *sm;
 550                 int found = 0;
 551
 552                 /* validate base */
 553                 fc.fss = ss;
 554                 fc.fbase = 0;
 555                 fc.fscope = 0;
 556                 rc = syncprov_findbase( op, &fc );
 557                 if ( rc != LDAP_SUCCESS ) continue;
 558
 559                 /* If we're sending results now, look for this op in old matches */
 560                 if ( !saveit ) {
 561                         syncmatches *old;
 562                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 563                                 old=sm, sm=sm->sm_next ) {
 564                                 if ( sm->sm_op == ss ) {
 565                                         found = 1;
 566                                         old->sm_next = sm->sm_next;
 567                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 568                                         break;
 569                                 }
 570                         }
 571                 }
 572
 573                 /* check if current o_req_dn is in scope and matches filter */
 574                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 575                         LDAP_COMPARE_TRUE ) {
 576                         if ( saveit ) {
 577                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 578                                 sm->sm_next = opc->smatches;
 579                                 sm->sm_op = ss;
 580                                 opc->smatches = sm;
 581                         } else {
 582                                 /* if found send UPDATE else send ADD */
 583                                 syncprov_sendresp( op, opc, ss, e,
 584                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 585                         }
 586                 } else if ( !saveit && found ) {
 587                         /* send DELETE */
 588                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 589                 }
 590         }
 591         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 592         if ( op->o_tag != LDAP_REQ_ADD ) {
 593                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 594                 be_entry_release_r( op, e );
 595                 op->o_bd->bd_info = (BackendInfo *)on;
 596         }
 597 }
 598
 599 static int
 600 syncprov_op_cleanup( Operation *op, SlapReply *rs )
 601 {
 602         slap_callback *cb = op->o_callback;
 603         opcookie *opc = cb->sc_private;
 604         syncmatches *sm, *snext;
 605
 606         for (sm = opc->smatches; sm; sm=snext) {
 607                 snext = sm->sm_next;
 608                 op->o_tmpfree( sm, op->o_tmpmemctx );
 609         }
 610         op->o_callback = cb->sc_next;
 611         op->o_tmpfree(cb, op->o_tmpmemctx);
 612 }
 613
 614 static int
 615 syncprov_op_response( Operation *op, SlapReply *rs )
 616 {
 617         opcookie *opc = op->o_callback->sc_private;
 618         slap_overinst *on = opc->son;
 619         syncprov_info_t         *si = on->on_bi.bi_private;
 620         syncmatches *sm;
 621
 622         if ( rs->sr_err == LDAP_SUCCESS )
 623         {
 624                 struct berval maxcsn;
 625                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 626
 627                 cbuf[0] = '\0';
 628                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
 629                 slap_get_commit_csn( op, &maxcsn );
 630                 if ( maxcsn.bv_val ) {
 631                         strcpy( cbuf, maxcsn.bv_val );
 632                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
 633                                 strcpy( si->si_ctxcsnbuf, cbuf );
 634                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
 635                         }
 636                         si->si_gotcsn = 1;
 637                 }
 638                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
 639
 640                 opc->sctxcsn.bv_len = maxcsn.bv_len;
 641                 opc->sctxcsn.bv_val = cbuf;
 642
 643                 if ( si->si_ops ) {
 644                         switch(op->o_tag) {
 645                         case LDAP_REQ_ADD:
 646                         case LDAP_REQ_MODIFY:
 647                         case LDAP_REQ_MODRDN:
 648                         case LDAP_REQ_EXTENDED:
 649                                 syncprov_matchops( op, opc, 0 );
 650                                 break;
 651                         case LDAP_REQ_DELETE:
 652                                 /* for each match in opc->smatches:
 653                                  *   send DELETE msg
 654                                  */
 655                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
 656                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
 657                                                 LDAP_SYNC_DELETE, 1 );
 658                                 }
 659                                 break;
 660                         }
 661                 }
 662
 663         }
 664         return SLAP_CB_CONTINUE;
 665 }
 666
 667 #if 0
 668 static int
 669 syncprov_op_compare( Operation *op, SlapReply *rs )
 670 {
 671         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 672         syncprov_info_t         *si = on->on_bi.bi_private;
 673         int rc = SLAP_CB_CONTINUE;
 674
 675         if ( dn_match( &op->o_req_ndn, &si->si_e->e_nname ) )
 676         {
 677                 Attribute *a;
 678
 679                 ldap_pvt_thread_mutex_lock( &si->si_e_mutex );
 680
 681                 if ( get_assert( op ) &&
 682                         ( test_filter( op, si->si_e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
 683                 {
 684                         rs->sr_err = LDAP_ASSERTION_FAILED;
 685                         goto return_results;
 686                 }
 687
 688                 rs->sr_err = access_allowed( op, si->si_e, op->oq_compare.rs_ava->aa_desc,
 689                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
 690                 if ( ! rs->sr_err ) {
 691                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 692                         goto return_results;
 693                 }
 694
 695                 rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
 696
 697                 for ( a = attr_find( si->si_e->e_attrs, op->oq_compare.rs_ava->aa_desc );
 698                         a != NULL;
 699                         a = attr_find( a->a_next, op->oq_compare.rs_ava->aa_desc ) )
 700                 {
 701                         rs->sr_err = LDAP_COMPARE_FALSE;
 702
 703                         if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
 704                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 705                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 706                                 a->a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
 707                         {
 708                                 rs->sr_err = LDAP_COMPARE_TRUE;
 709                                 break;
 710                         }
 711                 }
 712
 713 return_results:;
 714
 715                 ldap_pvt_thread_mutex_unlock( &si->si_e_mutex );
 716
 717                 send_ldap_result( op, rs );
 718
 719                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
 720                         rs->sr_err = LDAP_SUCCESS;
 721                 }
 722                 rc = rs->sr_err;
 723         }
 724
 725         return SLAP_CB_CONTINUE;
 726 }
 727 #endif
 728
 729 static int
 730 syncprov_op_mod( Operation *op, SlapReply *rs )
 731 {
 732         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 733         syncprov_info_t         *si = on->on_bi.bi_private;
 734
 735         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(opcookie), op->o_tmpmemctx);
 736         opcookie *opc = (opcookie *)(cb+1);
 737         opc->son = on;
 738         cb->sc_response = syncprov_op_response;
 739         cb->sc_cleanup = syncprov_op_cleanup;
 740         cb->sc_private = opc;
 741         cb->sc_next = op->o_callback;
 742         op->o_callback = cb;
 743
 744         if ( si->si_ops && op->o_tag != LDAP_REQ_ADD )
 745                 syncprov_matchops( op, opc, 1 );
 746
 747         return SLAP_CB_CONTINUE;
 748 }
 749
 750 static int
 751 syncprov_op_extended( Operation *op, SlapReply *rs )
 752 {
 753         if ( exop_is_write( op ))
 754                 return syncprov_op_mod( op, rs );
 755
 756         return SLAP_CB_CONTINUE;
 757 }
 758
 759 typedef struct searchstate {
 760         slap_overinst *ss_on;
 761         syncops *ss_so;
 762 } searchstate;
 763
 764 static int
 765 syncprov_search_cleanup( Operation *op, SlapReply *rs )
 766 {
 767         searchstate *ss = op->o_callback->sc_private;
 768         if ( rs->sr_ctrls ) {
 769                 free( rs->sr_ctrls[0] );
 770                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 771         }
 772         return 0;
 773 }
 774
 775 static void
 776 syncprov_detach_op( Operation *op, syncops *so )
 777 {
 778         Operation *op2;
 779         int i, alen = 0;
 780         size_t size;
 781         char *ptr;
 782
 783         /* count the search attrs */
 784         for (i=0; op->ors_attrs && op->ors_attrs[i].an_name.bv_val; i++) {
 785                 alen += op->ors_attrs[i].an_name.bv_len + 1;
 786         }
 787         /* Make a new copy of the operation */
 788         size = sizeof(Operation) + sizeof(Opheader) +
 789                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
 790                 op->o_req_dn.bv_len + 1 +
 791                 op->o_req_ndn.bv_len + 1 +
 792                 op->o_ndn.bv_len + 1 +
 793                 so->s_filterstr.bv_len + 1;
 794         op2 = (Operation *)ch_malloc( size );
 795         *op2 = *op;
 796         op2->o_hdr = (Opheader *)(op2+1);
 797         *op2->o_hdr = *op->o_hdr;
 798         if ( i ) {
 799                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
 800                 ptr = (char *)(op2->ors_attrs+i+1);
 801                 for (i=0; op->ors_attrs[i].an_name.bv_val; i++) {
 802                         op2->ors_attrs[i] = op->ors_attrs[i];
 803                         op2->ors_attrs[i].an_name.bv_val = ptr;
 804                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
 805                 }
 806         } else {
 807                 ptr = (char *)(op2->o_hdr + 1);
 808         }
 809         op2->o_ndn.bv_val = ptr;
 810         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
 811         op2->o_dn = op2->o_ndn;
 812         op2->o_req_dn.bv_val = ptr;
 813         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
 814         op2->o_req_ndn.bv_val = ptr;
 815         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
 816         op2->ors_filterstr.bv_val = ptr;
 817         strcpy( ptr, so->s_filterstr.bv_val );
 818         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
 819         op2->ors_filter = str2filter( ptr );
 820         op2->o_controls = NULL;
 821         op2->o_callback = NULL;
 822         so->s_op = op2;
 823
 824         /* Increment number of ops so that idletimeout ignores us */
 825         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 826         op->o_conn->c_n_ops_executing++;
 827         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 828 }
 829
 830 static int
 831 syncprov_search_response( Operation *op, SlapReply *rs )
 832 {
 833         searchstate *ss = op->o_callback->sc_private;
 834         slap_overinst *on = ss->ss_on;
 835         syncprov_info_t         *si = on->on_bi.bi_private;
 836         syncrepl_state *srs = op->o_controls[sync_cid];
 837
 838         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
 839                 int i;
 840                 if ( srs->sr_state.ctxcsn ) {
 841                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
 842                                 slap_schema.si_ad_entryCSN );
 843                         /* Don't send the ctx entry twice */
 844                         if ( bvmatch( &a->a_nvals[0], srs->sr_state.ctxcsn ))
 845                                 return LDAP_SUCCESS;
 846                 }
 847                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
 848                         op->o_tmpmemctx );
 849                 rs->sr_ctrls[1] = NULL;
 850                 rs->sr_err = slap_build_sync_state_ctrl( op, rs, rs->sr_entry,
 851                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
 852         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
 853                 struct berval cookie;
 854
 855                 slap_compose_sync_cookie( op, &cookie,
 856                         &op->ors_filter->f_and->f_ava->aa_value,
 857                         srs->sr_state.sid, srs->sr_state.rid );
 858
 859                 /* Is this a regular refresh? */
 860                 if ( !ss->ss_so ) {
 861                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
 862                                 op->o_tmpmemctx );
 863                         rs->sr_ctrls[1] = NULL;
 864                         rs->sr_err = slap_build_sync_done_ctrl( op, rs, rs->sr_ctrls,
 865                                 0, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
 866                 } else {
 867                         int locked = 0;
 868                 /* It's RefreshAndPersist, transition to Persist phase */
 869                         rs->sr_rspoid = LDAP_SYNC_INFO;
 870                         slap_send_syncinfo( op, rs, rs->sr_nentries ?
 871                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
 872                                 &cookie, 1, NULL, 0 );
 873                         /* Flush any queued persist messages */
 874                         if ( ss->ss_so->s_res ) {
 875                                 syncres *sr, *srnext;
 876                                 Entry *e;
 877                                 opcookie opc;
 878
 879                                 opc.son = on;
 880                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
 881                                 locked = 1;
 882                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
 883                                         int rc = LDAP_SUCCESS;
 884                                         srnext = sr->s_next;
 885                                         opc.sdn = sr->s_dn;
 886                                         opc.sndn = sr->s_ndn;
 887                                         opc.suuid = sr->s_uuid;
 888                                         opc.sctxcsn = sr->s_csn;
 889                                         opc.sreference = sr->s_isreference;
 890                                         e = NULL;
 891
 892                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
 893                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 894                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
 895                                                 op->o_bd->bd_info = (BackendInfo *)on;
 896                                         }
 897                                         if ( rc == LDAP_SUCCESS )
 898                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
 899                                                         sr->s_mode, 0 );
 900
 901                                         if ( e ) {
 902                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 903                                                 be_entry_release_r( op, e );
 904                                                 op->o_bd->bd_info = (BackendInfo *)on;
 905                                         }
 906                                         ch_free( sr );
 907                                 }
 908                                 ss->ss_so->s_res = NULL;
 909                                 ss->ss_so->s_restail = NULL;
 910                         }
 911
 912                         /* Turn off the refreshing flag */
 913                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
 914                         if ( locked )
 915                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
 916
 917                         /* Detach this Op from frontend control */
 918                         syncprov_detach_op( op, ss->ss_so );
 919
 920                         return LDAP_SUCCESS;
 921                 }
 922         }
 923
 924         return SLAP_CB_CONTINUE;
 925 }
 926
 927 static int
 928 syncprov_op_search( Operation *op, SlapReply *rs )
 929 {
 930         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 931         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
 932         slap_callback   *cb;
 933         int gotstate = 0, nochange = 0;
 934         Filter *fand, *fava;
 935         syncops *sop = NULL;
 936         searchstate *ss;
 937         syncrepl_state *srs;
 938
 939         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
 940
 941         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
 942                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
 943                 return rs->sr_err;
 944         }
 945
 946         srs = op->o_controls[sync_cid];
 947
 948         /* If this is a persistent search, set it up right away */
 949         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
 950                 syncops so = {0};
 951                 fbase_cookie fc;
 952                 opcookie opc;
 953                 slap_callback sc;
 954
 955                 fc.fss = &so;
 956                 fc.fbase = 0;
 957                 so.s_eid = NOID;
 958                 so.s_op = op;
 959                 so.s_flags = PS_IS_REFRESHING;
 960                 /* syncprov_findbase expects to be called as a callback... */
 961                 sc.sc_private = &opc;
 962                 opc.son = on;
 963                 cb = op->o_callback;
 964                 op->o_callback = &sc;
 965                 rs->sr_err = syncprov_findbase( op, &fc );
 966                 op->o_callback = cb;
 967
 968                 if ( rs->sr_err != LDAP_SUCCESS ) {
 969                         send_ldap_result( op, rs );
 970                         return rs->sr_err;
 971                 }
 972                 sop = ch_malloc( sizeof( syncops ));
 973                 *sop = so;
 974                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
 975                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 976                 sop->s_sid = srs->sr_state.sid;
 977                 sop->s_rid = srs->sr_state.rid;
 978                 sop->s_next = si->si_ops;
 979                 si->si_ops = sop;
 980                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 981         }
 982
 983         /* If we have a cookie, handle the PRESENT lookups
 984          */
 985         if ( srs->sr_state.ctxcsn ) {
 986                 /* Is the CSN in a valid format? */
 987                 if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 988                         send_ldap_error( op, rs, LDAP_OTHER, "invalid sync cookie" );
 989                         return rs->sr_err;
 990                 }
 991                 /* Is the CSN still present in the database? */
 992                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
 993                         /* No, so a reload is required */
 994 #if 0           /* the consumer doesn't seem to send this hint */
 995                         if ( op->o_sync_rhint == 0 ) {
 996                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
 997                                 return rs->sr_err;
 998                         }
 999 #endif
1000                 } else {
1001                         gotstate = 1;
1002                         /* If just Refreshing and nothing has changed, shortcut it */
1003                         if ( bvmatch( srs->sr_state.ctxcsn, &si->si_ctxcsn )) {
1004                                 nochange = 1;
1005                                 if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1006                                         LDAPControl     *ctrls[2];
1007
1008                                         ctrls[0] = NULL;
1009                                         ctrls[1] = NULL;
1010                                         slap_build_sync_done_ctrl( op, rs, ctrls, 0, 0,
1011                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
1012                                         rs->sr_ctrls = ctrls;
1013                                         rs->sr_err = LDAP_SUCCESS;
1014                                         send_ldap_result( op, rs );
1015                                         return rs->sr_err;
1016                                 }
1017                                 goto shortcut;
1018                         } else
1019                         /* If context has changed, check for Present UUIDs */
1020                         if ( syncprov_findcsn( op, FIND_PRESENT ) != LDAP_SUCCESS ) {
1021                                 send_ldap_result( op, rs );
1022                                 return rs->sr_err;
1023                         }
1024                 }
1025         }
1026
1027         /* If we didn't get a cookie and we don't know our contextcsn, try to
1028          * find it anyway.
1029          */
1030         if ( !gotstate && !si->si_gotcsn ) {
1031                 struct berval bv = BER_BVC("1"), *old;
1032
1033                 old = srs->sr_state.ctxcsn;
1034                 srs->sr_state.ctxcsn = &bv;
1035                 syncprov_findcsn( op, FIND_CSN );
1036                 srs->sr_state.ctxcsn = old;
1037         }
1038
1039         /* Append CSN range to search filter, save original filter
1040          * for persistent search evaluation
1041          */
1042         if ( sop ) {
1043                 sop->s_filterstr= op->ors_filterstr;
1044         }
1045
1046         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1047         fand->f_choice = LDAP_FILTER_AND;
1048         fand->f_next = NULL;
1049         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1050         fava->f_choice = LDAP_FILTER_LE;
1051         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1052         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1053         ber_dupbv_x( &fava->f_ava->aa_value, &si->si_ctxcsn, op->o_tmpmemctx );
1054         fand->f_and = fava;
1055         if ( gotstate ) {
1056                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1057                 fava = fava->f_next;
1058                 fava->f_choice = LDAP_FILTER_GE;
1059                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1060                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1061                 ber_dupbv_x( &fava->f_ava->aa_value, srs->sr_state.ctxcsn, op->o_tmpmemctx );
1062         }
1063         fava->f_next = op->ors_filter;
1064         op->ors_filter = fand;
1065         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1066
1067 shortcut:
1068         /* Let our callback add needed info to returned entries */
1069         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1070         ss = (searchstate *)(cb+1);
1071         ss->ss_on = on;
1072         ss->ss_so = sop;
1073         cb->sc_response = syncprov_search_response;
1074         cb->sc_cleanup = syncprov_search_cleanup;
1075         cb->sc_private = ss;
1076         cb->sc_next = op->o_callback;
1077         op->o_callback = cb;
1078
1079         op->o_sync_mode &= SLAP_CONTROL_MASK;
1080
1081         /* If this is a persistent search and no changes were reported during
1082          * the refresh phase, just invoke the response callback to transition
1083          * us into persist phase
1084          */
1085         if ( nochange ) {
1086                 rs->sr_err = LDAP_SUCCESS;
1087                 rs->sr_nentries = 0;
1088                 send_ldap_result( op, rs );
1089                 return rs->sr_err;
1090         }
1091         return SLAP_CB_CONTINUE;
1092 }
1093
1094 static int
1095 syncprov_db_config(
1096         BackendDB       *be,
1097         const char      *fname,
1098         int             lineno,
1099         int             argc,
1100         char    **argv
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 0
1107         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1108                 if ( argc != 3 ) {
1109                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1110                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1111                         return -1;
1112                 }
1113                 si->si_chkops = atoi( argv[1] );
1114                 si->si_chktime = atoi( argv[2] ) * 60;
1115
1116         } else {
1117                 return SLAP_CONF_UNKNOWN;
1118         }
1119 #endif
1120
1121         return SLAP_CONF_UNKNOWN;
1122 }
1123
1124 static int
1125 syncprov_db_init(
1126         BackendDB *be
1127 )
1128 {
1129         slap_overinst   *on = (slap_overinst *)be->bd_info;
1130         syncprov_info_t *si;
1131
1132         si = ch_calloc(1, sizeof(syncprov_info_t));
1133         on->on_bi.bi_private = si;
1134         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
1135         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
1136         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
1137
1138         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
1139         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
1140
1141         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
1142         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
1143
1144         sync_cid = slap_cids.sc_LDAPsync;
1145
1146         return 0;
1147 }
1148
1149 static int
1150 syncprov_db_destroy(
1151         BackendDB *be
1152 )
1153 {
1154         slap_overinst   *on = (slap_overinst *)be->bd_info;
1155         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1156
1157         if ( si ) {
1158                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
1159                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
1160                 ch_free( si );
1161         }
1162
1163         return 0;
1164 }
1165
1166 /* This overlay is set up for dynamic loading via moduleload. For static
1167  * configuration, you'll need to arrange for the slap_overinst to be
1168  * initialized and registered by some other function inside slapd.
1169  */
1170
1171 static slap_overinst            syncprov;
1172
1173 int
1174 syncprov_init()
1175 {
1176         syncprov.on_bi.bi_type = "syncprov";
1177         syncprov.on_bi.bi_db_init = syncprov_db_init;
1178         syncprov.on_bi.bi_db_config = syncprov_db_config;
1179         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
1180
1181         syncprov.on_bi.bi_op_add = syncprov_op_mod;
1182 #if 0
1183         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
1184 #endif
1185         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
1186         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
1187         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
1188         syncprov.on_bi.bi_op_search = syncprov_op_search;
1189         syncprov.on_bi.bi_extended = syncprov_op_extended;
1190
1191 #if 0
1192         syncprov.on_response = syncprov_response;
1193 #endif
1194
1195         return overlay_register( &syncprov );
1196 }
1197
1198 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
1199 int
1200 init_module( int argc, char *argv[] )
1201 {
1202         return syncprov_init();
1203 }
1204 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
1205
1206 #endif /* defined(SLAPD_OVER_SYNCPROV) */