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

   1 /* $OpenLDAP$ */
   2 /* syncprov.c - syncrepl provider */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Howard Chu for inclusion in
  18  * OpenLDAP Software.
  19  */
  20
  21 #include "portable.h"
  22
  23 #ifdef SLAPD_OVER_SYNCPROV
  24
  25 #include <ac/string.h>
  26 #include "lutil.h"
  27 #include "slap.h"
  28
  29 /* A modify request on a particular entry */
  30 typedef struct modinst {
  31         struct modinst *mi_next;
  32         Operation *mi_op;
  33 } modinst;
  34
  35 typedef struct modtarget {
  36         struct modinst *mt_mods;
  37         struct modinst *mt_tail;
  38         Operation *mt_op;
  39         ldap_pvt_thread_mutex_t mt_mutex;
  40 } modtarget;
  41
  42 /* A queued result of a persistent search */
  43 typedef struct syncres {
  44         struct syncres *s_next;
  45         struct berval s_dn;
  46         struct berval s_ndn;
  47         struct berval s_uuid;
  48         struct berval s_csn;
  49         char s_mode;
  50         char s_isreference;
  51 } syncres;
  52
  53 /* Record of a persistent search */
  54 typedef struct syncops {
  55         struct syncops *s_next;
  56         struct berval   s_base;         /* ndn of search base */
  57         ID              s_eid;          /* entryID of search base */
  58         Operation       *s_op;          /* search op */
  59         int             s_sid;
  60         int             s_rid;
  61         struct berval s_filterstr;
  62         int             s_flags;        /* search status */
  63         int             s_inuse;        /* reference count */
  64         struct syncres *s_res;
  65         struct syncres *s_restail;
  66         ldap_pvt_thread_mutex_t s_mutex;
  67 } syncops;
  68
  69 /* A received sync control */
  70 typedef struct sync_control {
  71         struct sync_cookie sr_state;
  72         int sr_rhint;
  73 } sync_control;
  74
  75 #if 0 /* moved back to slap.h */
  76 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  77 #endif
  78 /* o_sync_mode uses data bits of o_sync */
  79 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  80
  81 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  82 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  83 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  84 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  85
  86 #define PS_IS_REFRESHING        0x01
  87
  88 /* Record of which searches matched at premodify step */
  89 typedef struct syncmatches {
  90         struct syncmatches *sm_next;
  91         syncops *sm_op;
  92 } syncmatches;
  93
  94 /* Session log data */
  95 typedef struct slog_entry {
  96         struct slog_entry *se_next;
  97         struct berval se_uuid;
  98         struct berval se_csn;
  99         ber_tag_t       se_tag;
 100 } slog_entry;
 101
 102 typedef struct sessionlog {
 103         struct sessionlog *sl_next;
 104         int             sl_sid;
 105         struct berval   sl_mincsn;
 106         int             sl_num;
 107         int             sl_size;
 108         slog_entry *sl_head;
 109         slog_entry *sl_tail;
 110         ldap_pvt_thread_mutex_t sl_mutex;
 111 } sessionlog;
 112
 113 /* The main state for this overlay */
 114 typedef struct syncprov_info_t {
 115         syncops         *si_ops;
 116         struct berval   si_ctxcsn;      /* ldapsync context */
 117         int             si_chkops;      /* checkpointing info */
 118         int             si_chktime;
 119         int             si_numops;      /* number of ops since last checkpoint */
 120         time_t  si_chklast;     /* time of last checkpoint */
 121         Avlnode *si_mods;       /* entries being modified */
 122         sessionlog      *si_logs;
 123         ldap_pvt_thread_mutex_t si_csn_mutex;
 124         ldap_pvt_thread_mutex_t si_ops_mutex;
 125         ldap_pvt_thread_mutex_t si_mods_mutex;
 126         char            si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 127 } syncprov_info_t;
 128
 129 typedef struct opcookie {
 130         slap_overinst *son;
 131         syncmatches *smatches;
 132         struct berval sdn;      /* DN of entry, for deletes */
 133         struct berval sndn;
 134         struct berval suuid;    /* UUID of entry */
 135         struct berval sctxcsn;
 136         int sreference; /* Is the entry a reference? */
 137 } opcookie;
 138
 139 typedef struct fbase_cookie {
 140         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 141         syncops *fss;   /* persistent search we're testing against */
 142         int fbase;      /* if TRUE we found the search base and it's still valid */
 143         int fscope;     /* if TRUE then fdn is within the psearch scope */
 144 } fbase_cookie;
 145
 146 static AttributeName csn_anlist[2];
 147 static AttributeName uuid_anlist[2];
 148
 149 /* Build a LDAPsync intermediate state control */
 150 static int
 151 syncprov_state_ctrl(
 152         Operation       *op,
 153         SlapReply       *rs,
 154         Entry           *e,
 155         int             entry_sync_state,
 156         LDAPControl     **ctrls,
 157         int             num_ctrls,
 158         int             send_cookie,
 159         struct berval   *cookie )
 160 {
 161         Attribute* a;
 162         int ret;
 163         int res;
 164         const char *text = NULL;
 165
 166         BerElementBuffer berbuf;
 167         BerElement *ber = (BerElement *)&berbuf;
 168
 169         struct berval   entryuuid_bv = BER_BVNULL;
 170
 171         ber_init2( ber, 0, LBER_USE_DER );
 172         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 173
 174         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 175
 176         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 177                 AttributeDescription *desc = a->a_desc;
 178                 if ( desc == slap_schema.si_ad_entryUUID ) {
 179                         entryuuid_bv = a->a_nvals[0];
 180                         break;
 181                 }
 182         }
 183
 184         if ( send_cookie && cookie ) {
 185                 ber_printf( ber, "{eOON}",
 186                         entry_sync_state, &entryuuid_bv, cookie );
 187         } else {
 188                 ber_printf( ber, "{eON}",
 189                         entry_sync_state, &entryuuid_bv );
 190         }
 191
 192         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 193         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 194         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 195
 196         ber_free_buf( ber );
 197
 198         if ( ret < 0 ) {
 199                 Debug( LDAP_DEBUG_TRACE,
 200                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 201                         0, 0, 0 );
 202                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 203                 return ret;
 204         }
 205
 206         return LDAP_SUCCESS;
 207 }
 208
 209 /* Build a LDAPsync final state control */
 210 static int
 211 syncprov_done_ctrl(
 212         Operation       *op,
 213         SlapReply       *rs,
 214         LDAPControl     **ctrls,
 215         int                     num_ctrls,
 216         int                     send_cookie,
 217         struct berval *cookie,
 218         int                     refreshDeletes )
 219 {
 220         int ret;
 221         BerElementBuffer berbuf;
 222         BerElement *ber = (BerElement *)&berbuf;
 223
 224         ber_init2( ber, NULL, LBER_USE_DER );
 225         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 226
 227         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 228
 229         ber_printf( ber, "{" );
 230         if ( send_cookie && cookie ) {
 231                 ber_printf( ber, "O", cookie );
 232         }
 233         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 234                 ber_printf( ber, "b", refreshDeletes );
 235         }
 236         ber_printf( ber, "N}" );
 237
 238         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 239         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 240         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 241
 242         ber_free_buf( ber );
 243
 244         if ( ret < 0 ) {
 245                 Debug( LDAP_DEBUG_TRACE,
 246                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 247                         0, 0, 0 );
 248                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 249                 return ret;
 250         }
 251
 252         return LDAP_SUCCESS;
 253 }
 254
 255 #if 0
 256 /* Generate state based on session log - not implemented yet */
 257 static int
 258 syncprov_state_ctrl_from_slog(
 259         Operation       *op,
 260         SlapReply       *rs,
 261         struct slog_entry *slog_e,
 262         int                     entry_sync_state,
 263         LDAPControl     **ctrls,
 264         int                     num_ctrls,
 265         int                     send_cookie,
 266         struct berval   *cookie)
 267 {
 268         Attribute* a;
 269         int ret;
 270         int res;
 271         const char *text = NULL;
 272
 273         BerElementBuffer berbuf;
 274         BerElement *ber = (BerElement *)&berbuf;
 275
 276         struct berval entryuuid_bv      = BER_BVNULL;
 277
 278         ber_init2( ber, NULL, LBER_USE_DER );
 279         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 280
 281         ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
 282
 283         entryuuid_bv = slog_e->sl_uuid;
 284
 285         if ( send_cookie && cookie ) {
 286                 ber_printf( ber, "{eOON}",
 287                         entry_sync_state, &entryuuid_bv, cookie );
 288         } else {
 289                 ber_printf( ber, "{eON}",
 290                         entry_sync_state, &entryuuid_bv );
 291         }
 292
 293         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 294         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 295         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 296
 297         ber_free_buf( ber );
 298
 299         if ( ret < 0 ) {
 300                 Debug( LDAP_DEBUG_TRACE,
 301                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 302                         0, 0, 0 );
 303                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 304                 return ret;
 305         }
 306
 307         return LDAP_SUCCESS;
 308 }
 309 #endif
 310
 311 static int
 312 syncprov_sendinfo(
 313         Operation       *op,
 314         SlapReply       *rs,
 315         int                     type,
 316         struct berval *cookie,
 317         int                     refreshDone,
 318         BerVarray       syncUUIDs,
 319         int                     refreshDeletes )
 320 {
 321         BerElementBuffer berbuf;
 322         BerElement *ber = (BerElement *)&berbuf;
 323         struct berval rspdata;
 324
 325         int ret;
 326
 327         ber_init2( ber, NULL, LBER_USE_DER );
 328         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 329
 330         if ( type ) {
 331                 switch ( type ) {
 332                 case LDAP_TAG_SYNC_NEW_COOKIE:
 333                         ber_printf( ber, "tO", type, cookie );
 334                         break;
 335                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 336                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 337                         ber_printf( ber, "t{", type );
 338                         if ( cookie ) {
 339                                 ber_printf( ber, "O", cookie );
 340                         }
 341                         if ( refreshDone == 0 ) {
 342                                 ber_printf( ber, "b", refreshDone );
 343                         }
 344                         ber_printf( ber, "N}" );
 345                         break;
 346                 case LDAP_TAG_SYNC_ID_SET:
 347                         ber_printf( ber, "t{", type );
 348                         if ( cookie ) {
 349                                 ber_printf( ber, "O", cookie );
 350                         }
 351                         if ( refreshDeletes == 1 ) {
 352                                 ber_printf( ber, "b", refreshDeletes );
 353                         }
 354                         ber_printf( ber, "[W]", syncUUIDs );
 355                         ber_printf( ber, "N}" );
 356                         break;
 357                 default:
 358                         Debug( LDAP_DEBUG_TRACE,
 359                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 360                                 type, 0, 0 );
 361                         return LDAP_OTHER;
 362                 }
 363         }
 364
 365         ret = ber_flatten2( ber, &rspdata, 0 );
 366
 367         if ( ret < 0 ) {
 368                 Debug( LDAP_DEBUG_TRACE,
 369                         "syncprov_sendinfo: ber_flatten2 failed\n",
 370                         0, 0, 0 );
 371                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 372                 return ret;
 373         }
 374
 375         rs->sr_rspoid = LDAP_SYNC_INFO;
 376         rs->sr_rspdata = &rspdata;
 377         send_ldap_intermediate( op, rs );
 378         rs->sr_rspdata = NULL;
 379         ber_free_buf( ber );
 380
 381         return LDAP_SUCCESS;
 382 }
 383
 384 /* Find a modtarget in an AVL tree */
 385 static int
 386 sp_avl_cmp( const void *c1, const void *c2 )
 387 {
 388         const modtarget *m1, *m2;
 389         int rc;
 390
 391         m1 = c1; m2 = c2;
 392         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 393
 394         if ( rc ) return rc;
 395         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 396 }
 397
 398 /* syncprov_findbase:
 399  *   finds the true DN of the base of a search (with alias dereferencing) and
 400  * checks to make sure the base entry doesn't get replaced with a different
 401  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 402  * change is detected, any persistent search on this base must be terminated /
 403  * reloaded.
 404  *   On the first call, we just save the DN and entryID. On subsequent calls
 405  * we compare the DN and entryID with the saved values.
 406  */
 407 static int
 408 findbase_cb( Operation *op, SlapReply *rs )
 409 {
 410         slap_callback *sc = op->o_callback;
 411
 412         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 413                 fbase_cookie *fc = sc->sc_private;
 414
 415                 /* If no entryID, we're looking for the first time.
 416                  * Just store whatever we got.
 417                  */
 418                 if ( fc->fss->s_eid == NOID ) {
 419                         fc->fbase = 1;
 420                         fc->fss->s_eid = rs->sr_entry->e_id;
 421                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 422
 423                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 424                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 425
 426                 /* OK, the DN is the same and the entryID is the same. Now
 427                  * see if the fdn resides in the scope.
 428                  */
 429                         fc->fbase = 1;
 430                         switch ( fc->fss->s_op->ors_scope ) {
 431                         case LDAP_SCOPE_BASE:
 432                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 433                                 break;
 434                         case LDAP_SCOPE_ONELEVEL: {
 435                                 struct berval pdn;
 436                                 dnParent( fc->fdn, &pdn );
 437                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 438                                 break; }
 439                         case LDAP_SCOPE_SUBTREE:
 440                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 441                                 break;
 442 #ifdef LDAP_SCOPE_SUBORDINATE
 443                         case LDAP_SCOPE_SUBORDINATE:
 444                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 445                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 446                                 break;
 447 #endif
 448                         }
 449                 }
 450         }
 451         if ( rs->sr_err != LDAP_SUCCESS ) {
 452                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 453         }
 454         return LDAP_SUCCESS;
 455 }
 456
 457 static int
 458 syncprov_findbase( Operation *op, fbase_cookie *fc )
 459 {
 460         opcookie *opc = op->o_callback->sc_private;
 461         slap_overinst *on = opc->son;
 462         syncprov_info_t         *si = on->on_bi.bi_private;
 463
 464         slap_callback cb = {0};
 465         Operation fop;
 466         SlapReply frs = { REP_RESULT };
 467         int rc;
 468
 469         fop = *op;
 470
 471         cb.sc_response = findbase_cb;
 472         cb.sc_private = fc;
 473
 474         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 475         fop.o_callback = &cb;
 476         fop.o_tag = LDAP_REQ_SEARCH;
 477         fop.ors_scope = LDAP_SCOPE_BASE;
 478         fop.ors_deref = fc->fss->s_op->ors_deref;
 479         fop.ors_limit = NULL;
 480         fop.ors_slimit = 1;
 481         fop.ors_tlimit = SLAP_NO_LIMIT;
 482         fop.ors_attrs = slap_anlist_no_attrs;
 483         fop.ors_attrsonly = 1;
 484         fop.ors_filter = fc->fss->s_op->ors_filter;
 485         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 486
 487         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 488
 489         fop.o_bd->bd_info = on->on_info->oi_orig;
 490         rc = fop.o_bd->be_search( &fop, &frs );
 491         fop.o_bd->bd_info = (BackendInfo *)on;
 492
 493         if ( fc->fbase ) return LDAP_SUCCESS;
 494
 495         /* If entryID has changed, then the base of this search has
 496          * changed. Invalidate the psearch.
 497          */
 498         return LDAP_NO_SUCH_OBJECT;
 499 }
 500
 501 /* syncprov_findcsn:
 502  *   This function has three different purposes, but they all use a search
 503  * that filters on entryCSN so they're combined here.
 504  * 1: at startup time, after a contextCSN has been read from the database,
 505  * we search for all entries with CSN >= contextCSN in case the contextCSN
 506  * was not checkpointed at the previous shutdown.
 507  *
 508  * 2: when the current contextCSN is known and we have a sync cookie, we search
 509  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 510  * entry is found, the cookie CSN is valid, otherwise it is stale.
 511  *
 512  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 513  * CSN, and generate Present records for them. We always collect this result
 514  * in SyncID sets, even if there's only one match.
 515  */
 516 #define FIND_MAXCSN     1
 517 #define FIND_CSN        2
 518 #define FIND_PRESENT    3
 519
 520 static int
 521 findmax_cb( Operation *op, SlapReply *rs )
 522 {
 523         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 524                 struct berval *maxcsn = op->o_callback->sc_private;
 525                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 526                         slap_schema.si_ad_entryCSN );
 527
 528                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn )) {
 529                         maxcsn->bv_len = a->a_vals[0].bv_len;
 530                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 531                 }
 532         }
 533         return LDAP_SUCCESS;
 534 }
 535
 536 static int
 537 findcsn_cb( Operation *op, SlapReply *rs )
 538 {
 539         slap_callback *sc = op->o_callback;
 540
 541         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 542                 sc->sc_private = (void *)1;
 543         }
 544         return LDAP_SUCCESS;
 545 }
 546
 547 /* Build a list of entryUUIDs for sending in a SyncID set */
 548
 549 #define UUID_LEN        16
 550
 551 typedef struct fpres_cookie {
 552         int num;
 553         BerVarray uuids;
 554         char *last;
 555 } fpres_cookie;
 556
 557 static int
 558 findpres_cb( Operation *op, SlapReply *rs )
 559 {
 560         slap_callback *sc = op->o_callback;
 561         fpres_cookie *pc = sc->sc_private;
 562         Attribute *a;
 563         int ret = SLAP_CB_CONTINUE;
 564
 565         switch ( rs->sr_type ) {
 566         case REP_SEARCH:
 567                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 568                 if ( a ) {
 569                         pc->uuids[pc->num].bv_val = pc->last;
 570                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 571                                 pc->uuids[pc->num].bv_len );
 572                         pc->num++;
 573                         pc->last = pc->uuids[pc->num].bv_val;
 574                         pc->uuids[pc->num].bv_val = NULL;
 575                 }
 576                 ret = LDAP_SUCCESS;
 577                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 578                         break;
 579                 /* FALLTHRU */
 580         case REP_RESULT:
 581                 ret = rs->sr_err;
 582                 if ( pc->num ) {
 583                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 584                                 0, pc->uuids, 0 );
 585                         pc->uuids[pc->num].bv_val = pc->last;
 586                         pc->num = 0;
 587                         pc->last = pc->uuids[0].bv_val;
 588                 }
 589                 break;
 590         default:
 591                 break;
 592         }
 593         return ret;
 594 }
 595
 596 static int
 597 syncprov_findcsn( Operation *op, int mode )
 598 {
 599         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 600         syncprov_info_t         *si = on->on_bi.bi_private;
 601
 602         slap_callback cb = {0};
 603         Operation fop;
 604         SlapReply frs = { REP_RESULT };
 605         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 606         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 607         struct berval fbuf, maxcsn;
 608         Filter cf, af;
 609         AttributeAssertion eq;
 610         int i, rc = LDAP_SUCCESS;
 611         fpres_cookie pcookie;
 612         sync_control *srs;
 613
 614         if ( mode != FIND_MAXCSN ) {
 615                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 616
 617                 if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 618                         return LDAP_OTHER;
 619                 }
 620         }
 621
 622         fop = *op;
 623         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 624
 625         fbuf.bv_val = buf;
 626         cf.f_ava = &eq;
 627         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 628         cf.f_next = NULL;
 629
 630         fop.o_callback = &cb;
 631         fop.ors_limit = NULL;
 632         fop.ors_tlimit = SLAP_NO_LIMIT;
 633         fop.ors_filter = &cf;
 634         fop.ors_filterstr = fbuf;
 635
 636         switch( mode ) {
 637         case FIND_MAXCSN:
 638                 cf.f_choice = LDAP_FILTER_GE;
 639                 cf.f_av_value = si->si_ctxcsn;
 640                 fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)",
 641                         cf.f_av_value.bv_val );
 642                 fop.ors_attrsonly = 0;
 643                 fop.ors_attrs = csn_anlist;
 644                 fop.ors_slimit = SLAP_NO_LIMIT;
 645                 cb.sc_private = &maxcsn;
 646                 cb.sc_response = findmax_cb;
 647                 maxcsn.bv_val = cbuf;
 648                 maxcsn.bv_len = 0;
 649                 break;
 650         case FIND_CSN:
 651                 cf.f_choice = LDAP_FILTER_LE;
 652                 cf.f_av_value = *srs->sr_state.ctxcsn;
 653                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)",
 654                         cf.f_av_value.bv_val );
 655                 fop.ors_attrsonly = 1;
 656                 fop.ors_attrs = slap_anlist_no_attrs;
 657                 fop.ors_slimit = 1;
 658                 cb.sc_private = NULL;
 659                 cb.sc_response = findcsn_cb;
 660                 break;
 661         case FIND_PRESENT:
 662                 af.f_choice = LDAP_FILTER_AND;
 663                 af.f_next = NULL;
 664                 af.f_and = &cf;
 665                 cf.f_choice = LDAP_FILTER_LE;
 666                 cf.f_av_value = *srs->sr_state.ctxcsn;
 667                 cf.f_next = op->ors_filter;
 668                 fop.ors_filter = &af;
 669                 filter2bv_x( &fop, fop.ors_filter, &fop.ors_filterstr );
 670                 fop.ors_attrsonly = 0;
 671                 fop.ors_attrs = uuid_anlist;
 672                 fop.ors_slimit = SLAP_NO_LIMIT;
 673                 /* We want pure entries, not referrals */
 674                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 675                 cb.sc_private = &pcookie;
 676                 cb.sc_response = findpres_cb;
 677                 pcookie.num = 0;
 678
 679                 /* preallocate storage for a full set */
 680                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 681                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 682                         op->o_tmpmemctx );
 683                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 684                 pcookie.uuids[0].bv_val = pcookie.last;
 685                 pcookie.uuids[0].bv_len = UUID_LEN;
 686                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 687                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 688                         pcookie.uuids[i].bv_len = UUID_LEN;
 689                 }
 690                 break;
 691         }
 692
 693         fop.o_bd->bd_info = on->on_info->oi_orig;
 694         fop.o_bd->be_search( &fop, &frs );
 695         fop.o_bd->bd_info = (BackendInfo *)on;
 696
 697         switch( mode ) {
 698         case FIND_MAXCSN:
 699                 if ( maxcsn.bv_len ) {
 700                         strcpy( si->si_ctxcsnbuf, maxcsn.bv_val );
 701                         si->si_ctxcsn.bv_len = maxcsn.bv_len;
 702                 }
 703                 break;
 704         case FIND_CSN:
 705                 /* If matching CSN was not found, invalidate the context. */
 706                 if ( !cb.sc_private ) rc = LDAP_NO_SUCH_OBJECT;
 707                 break;
 708         case FIND_PRESENT:
 709                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 710                 op->o_tmpfree( fop.ors_filterstr.bv_val, op->o_tmpmemctx );
 711                 break;
 712         }
 713
 714         return rc;
 715 }
 716
 717 /* Queue a persistent search response if still in Refresh stage */
 718 static int
 719 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 720 {
 721         syncres *sr;
 722
 723         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 724                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 725         sr->s_next = NULL;
 726         sr->s_dn.bv_val = (char *)(sr + 1);
 727         sr->s_mode = mode;
 728         sr->s_isreference = opc->sreference;
 729         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 730         *(sr->s_ndn.bv_val++) = '\0';
 731         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 732         *(sr->s_uuid.bv_val++) = '\0';
 733         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 734
 735         if ( !so->s_res ) {
 736                 so->s_res = sr;
 737         } else {
 738                 so->s_restail->s_next = sr;
 739         }
 740         so->s_restail = sr;
 741         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 742         return LDAP_SUCCESS;
 743 }
 744
 745 /* Send a persistent search response */
 746 static int
 747 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 748 {
 749         slap_overinst *on = opc->son;
 750         syncprov_info_t *si = on->on_bi.bi_private;
 751
 752         SlapReply rs = { REP_SEARCH };
 753         LDAPControl *ctrls[2];
 754         struct berval cookie;
 755         Entry e_uuid = {0};
 756         Attribute a_uuid = {0};
 757         Operation sop = *so->s_op;
 758         Opheader ohdr;
 759
 760         ohdr = *sop.o_hdr;
 761         sop.o_hdr = &ohdr;
 762         sop.o_tmpmemctx = op->o_tmpmemctx;
 763         sop.o_bd = op->o_bd;
 764         sop.o_controls = op->o_controls;
 765
 766         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 767                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 768                 if ( so->s_flags & PS_IS_REFRESHING )
 769                         return syncprov_qresp( opc, so, mode );
 770                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 771         }
 772
 773         ctrls[1] = NULL;
 774         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn,
 775                 so->s_sid, so->s_rid );
 776
 777         e_uuid.e_attrs = &a_uuid;
 778         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 779         a_uuid.a_nvals = &opc->suuid;
 780         rs.sr_err = syncprov_state_ctrl( &sop, &rs, &e_uuid,
 781                 mode, ctrls, 0, 1, &cookie );
 782
 783         rs.sr_entry = e;
 784         rs.sr_ctrls = ctrls;
 785         switch( mode ) {
 786         case LDAP_SYNC_ADD:
 787                 if ( opc->sreference ) {
 788                         rs.sr_ref = get_entry_referrals( &sop, e );
 789                         send_search_reference( &sop, &rs );
 790                         ber_bvarray_free( rs.sr_ref );
 791                         break;
 792                 }
 793                 /* fallthru */
 794         case LDAP_SYNC_MODIFY:
 795                 rs.sr_attrs = sop.ors_attrs;
 796                 send_search_entry( &sop, &rs );
 797                 break;
 798         case LDAP_SYNC_DELETE:
 799                 e_uuid.e_attrs = NULL;
 800                 e_uuid.e_name = opc->sdn;
 801                 e_uuid.e_nname = opc->sndn;
 802                 rs.sr_entry = &e_uuid;
 803                 if ( opc->sreference ) {
 804                         struct berval bv = BER_BVNULL;
 805                         rs.sr_ref = &bv;
 806                         send_search_reference( &sop, &rs );
 807                 } else {
 808                         send_search_entry( &sop, &rs );
 809                 }
 810                 break;
 811         default:
 812                 assert(0);
 813         }
 814         op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
 815         rs.sr_ctrls = NULL;
 816         return rs.sr_err;
 817 }
 818
 819 static void
 820 syncprov_free_syncop( syncops *so )
 821 {
 822         syncres *sr, *srnext;
 823
 824         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 825         so->s_inuse--;
 826         if ( so->s_inuse > 0 ) {
 827                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 828                 return;
 829         }
 830         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 831         filter_free( so->s_op->ors_filter );
 832         ch_free( so->s_op );
 833         ch_free( so->s_base.bv_val );
 834         for ( sr=so->s_res; sr; sr=srnext ) {
 835                 srnext = sr->s_next;
 836                 ch_free( sr );
 837         }
 838         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 839         ch_free( so );
 840 }
 841
 842 static int
 843 syncprov_drop_psearch( syncops *so )
 844 {
 845         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
 846         so->s_op->o_conn->c_n_ops_executing--;
 847         so->s_op->o_conn->c_n_ops_completed++;
 848         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
 849         syncprov_free_syncop( so );
 850 }
 851
 852 static int
 853 syncprov_op_abandon( Operation *op, SlapReply *rs )
 854 {
 855         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 856         syncprov_info_t         *si = on->on_bi.bi_private;
 857         syncops *so, *soprev;
 858
 859         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 860         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
 861                 soprev=so, so=so->s_next ) {
 862                 if ( so->s_op->o_connid == op->o_connid &&
 863                         so->s_op->o_msgid == op->orn_msgid ) {
 864                                 so->s_op->o_abandon = 1;
 865                                 soprev->s_next = so->s_next;
 866                                 break;
 867                 }
 868         }
 869         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 870         if ( so ) {
 871                 /* Is this really a Cancel exop? */
 872                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
 873                         rs->sr_err = LDAP_CANCELLED;
 874                         send_ldap_result( so->s_op, rs );
 875                 }
 876                 syncprov_drop_psearch( so );
 877         }
 878         return SLAP_CB_CONTINUE;
 879 }
 880
 881 /* Find which persistent searches are affected by this operation */
 882 static void
 883 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 884 {
 885         slap_overinst *on = opc->son;
 886         syncprov_info_t         *si = on->on_bi.bi_private;
 887
 888         fbase_cookie fc;
 889         syncops *ss, *sprev, *snext;
 890         Entry *e;
 891         Attribute *a;
 892         int rc;
 893         struct berval newdn;
 894         int freefdn = 0;
 895
 896         fc.fdn = &op->o_req_ndn;
 897         /* compute new DN */
 898         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 899                 struct berval pdn;
 900                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 901                 else dnParent( fc.fdn, &pdn );
 902                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 903                 fc.fdn = &newdn;
 904                 freefdn = 1;
 905         }
 906         if ( op->o_tag != LDAP_REQ_ADD ) {
 907                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 908                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 909                 op->o_bd->bd_info = (BackendInfo *)on;
 910                 if ( rc ) return;
 911         } else {
 912                 e = op->ora_e;
 913         }
 914
 915         /* Never replicate these */
 916         if ( is_entry_syncConsumerSubentry( e )) {
 917                 goto done;
 918         }
 919         if ( saveit ) {
 920                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 921                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 922                 opc->sreference = is_entry_referral( e );
 923         }
 924         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 925                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 926                 if ( a )
 927                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 928         }
 929
 930         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 931         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
 932                 sprev = ss, ss=snext)
 933         {
 934                 syncmatches *sm;
 935                 int found = 0;
 936
 937                 snext = ss->s_next;
 938                 /* validate base */
 939                 fc.fss = ss;
 940                 fc.fbase = 0;
 941                 fc.fscope = 0;
 942
 943                 /* If the base of the search is missing, signal a refresh */
 944                 rc = syncprov_findbase( op, &fc );
 945                 if ( rc != LDAP_SUCCESS ) {
 946                         SlapReply rs = {REP_RESULT};
 947                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
 948                                 "search base has changed" );
 949                         sprev->s_next = snext;
 950                         syncprov_drop_psearch( ss );
 951                         continue;
 952                 }
 953
 954                 /* If we're sending results now, look for this op in old matches */
 955                 if ( !saveit ) {
 956                         syncmatches *old;
 957                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 958                                 old=sm, sm=sm->sm_next ) {
 959                                 if ( sm->sm_op == ss ) {
 960                                         found = 1;
 961                                         old->sm_next = sm->sm_next;
 962                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 963                                         break;
 964                                 }
 965                         }
 966                 }
 967
 968                 /* check if current o_req_dn is in scope and matches filter */
 969                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 970                         LDAP_COMPARE_TRUE ) {
 971                         if ( saveit ) {
 972                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 973                                 sm->sm_next = opc->smatches;
 974                                 sm->sm_op = ss;
 975                                 ss->s_inuse++;
 976                                 opc->smatches = sm;
 977                         } else {
 978                                 /* if found send UPDATE else send ADD */
 979                                 syncprov_sendresp( op, opc, ss, e,
 980                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 981                         }
 982                 } else if ( !saveit && found ) {
 983                         /* send DELETE */
 984                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 985                 }
 986         }
 987         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 988 done:
 989         if ( op->o_tag != LDAP_REQ_ADD ) {
 990                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 991                 be_entry_release_r( op, e );
 992                 op->o_bd->bd_info = (BackendInfo *)on;
 993         }
 994         if ( freefdn ) {
 995                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
 996         }
 997 }
 998
 999 static int
1000 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1001 {
1002         slap_callback *cb = op->o_callback;
1003         opcookie *opc = cb->sc_private;
1004         slap_overinst *on = opc->son;
1005         syncprov_info_t         *si = on->on_bi.bi_private;
1006         syncmatches *sm, *snext;
1007         modtarget *mt, mtdummy;
1008
1009         for (sm = opc->smatches; sm; sm=snext) {
1010                 snext = sm->sm_next;
1011                 syncprov_free_syncop( sm->sm_op );
1012                 op->o_tmpfree( sm, op->o_tmpmemctx );
1013         }
1014
1015         /* Remove op from lock table */
1016         mtdummy.mt_op = op;
1017         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1018         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1019         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1020         if ( mt ) {
1021                 modinst *mi = mt->mt_mods;
1022
1023                 /* If there are more, promote the next one */
1024                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1025                 if ( mi->mi_next ) {
1026                         mt->mt_mods = mi->mi_next;
1027                         mt->mt_op = mt->mt_mods->mi_op;
1028                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1029                 } else {
1030                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1031                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1032                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1033                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1034                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1035                         ch_free( mt );
1036                 }
1037         }
1038         if ( !BER_BVISNULL( &opc->suuid ))
1039                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1040         if ( !BER_BVISNULL( &opc->sndn ))
1041                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1042         if ( !BER_BVISNULL( &opc->sdn ))
1043                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1044         op->o_callback = cb->sc_next;
1045         op->o_tmpfree(cb, op->o_tmpmemctx);
1046 }
1047
1048 static void
1049 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1050 {
1051         syncprov_info_t         *si = on->on_bi.bi_private;
1052         Modifications mod;
1053         Operation opm;
1054         struct berval bv[2];
1055         BackendInfo *orig;
1056         slap_callback cb = {0};
1057
1058         mod.sml_values = bv;
1059         bv[1].bv_val = NULL;
1060         bv[0] = si->si_ctxcsn;
1061         mod.sml_nvalues = NULL;
1062         mod.sml_desc = slap_schema.si_ad_contextCSN;
1063         mod.sml_op = LDAP_MOD_REPLACE;
1064         mod.sml_next = NULL;
1065
1066         cb.sc_response = slap_null_cb;
1067         opm = *op;
1068         opm.o_tag = LDAP_REQ_MODIFY;
1069         opm.o_callback = &cb;
1070         opm.orm_modlist = &mod;
1071         opm.o_req_dn = op->o_bd->be_suffix[0];
1072         opm.o_req_ndn = op->o_bd->be_nsuffix[0];
1073         orig = opm.o_bd->bd_info;
1074         opm.o_bd->bd_info = on->on_info->oi_orig;
1075         opm.o_bd->be_modify( &opm, rs );
1076 }
1077
1078 static void
1079 syncprov_add_slog( Operation *op, struct berval *csn )
1080 {
1081         opcookie *opc = op->o_callback->sc_private;
1082         slap_overinst *on = opc->son;
1083         syncprov_info_t         *si = on->on_bi.bi_private;
1084         sessionlog *sl;
1085         slog_entry *se;
1086
1087         for ( sl = si->si_logs; sl; sl=sl->sl_next ) {
1088                 /* Allocate a record. UUIDs are not NUL-terminated. */
1089                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1090                         csn->bv_len + 1 );
1091                 se->se_next = NULL;
1092                 se->se_tag = op->o_tag;
1093
1094                 se->se_uuid.bv_val = (char *)(se+1);
1095                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len + 1;
1096                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1097                 se->se_uuid.bv_len = opc->suuid.bv_len;
1098
1099                 AC_MEMCPY( se->se_csn.bv_val, csn->bv_val, csn->bv_len );
1100                 se->se_csn.bv_val[csn->bv_len] = '\0';
1101                 se->se_csn.bv_len = csn->bv_len;
1102
1103                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1104                 if ( sl->sl_head ) {
1105                         sl->sl_tail->se_next = se;
1106                 } else {
1107                         sl->sl_head = se;
1108                 }
1109                 sl->sl_tail = se;
1110                 sl->sl_num++;
1111                 while ( sl->sl_num > sl->sl_size ) {
1112                         se = sl->sl_head;
1113                         sl->sl_head = se->se_next;
1114                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1115                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1116                         ch_free( se );
1117                         sl->sl_num--;
1118                         if ( !sl->sl_head ) {
1119                                 sl->sl_tail = NULL;
1120                         }
1121                 }
1122                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1123         }
1124 }
1125
1126 /* Just set a flag if we found the matching entry */
1127 static int
1128 playlog_cb( Operation *op, SlapReply *rs )
1129 {
1130         if ( rs->sr_type == REP_SEARCH ) {
1131                 op->o_callback->sc_private = (void *)1;
1132         }
1133         return rs->sr_err;
1134 }
1135
1136 /* enter with sl->sl_mutex locked, release before returning */
1137 static void
1138 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1139         struct berval *oldcsn, struct berval *ctxcsn )
1140 {
1141         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1142         syncprov_info_t         *si = on->on_bi.bi_private;
1143         slog_entry *se;
1144         int i, j, ndel, num, nmods, mmods;
1145         BerVarray uuids;
1146
1147         if ( !sl->sl_num ) {
1148                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1149                 return;
1150         }
1151
1152         num = sl->sl_num;
1153         i = 0;
1154         nmods = 0;
1155
1156         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1157                 num * UUID_LEN, op->o_tmpmemctx );
1158
1159         uuids[0].bv_val = (char *)(uuids + num + 1);
1160
1161         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1162          * and everything else at the end. Do this first so we can
1163          * unlock the list mutex.
1164          */
1165         for ( se=sl->sl_head; se; se=se->se_next ) {
1166                 if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
1167                 if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
1168                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1169                         j = i;
1170                         i++;
1171                 } else {
1172                         nmods++;
1173                         j = num - nmods;
1174                 }
1175                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1176                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1177                 uuids[j].bv_len = UUID_LEN;
1178         }
1179         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1180
1181         ndel = i;
1182
1183         /* Mods must be validated to see if they belong in this delete set.
1184          */
1185
1186         mmods = nmods;
1187         /* Strip any duplicates */
1188         for ( i=0; i<nmods; i++ ) {
1189                 for ( j=0; j<ndel; j++ ) {
1190                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1191                                 uuids[num - 1 - i].bv_len = 0;
1192                                 mmods --;
1193                                 break;
1194                         }
1195                 }
1196                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1197                 for ( j=0; j<i; j++ ) {
1198                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1199                                 uuids[num - 1 - i].bv_len = 0;
1200                                 mmods --;
1201                                 break;
1202                         }
1203                 }
1204         }
1205
1206         if ( mmods ) {
1207                 Operation fop;
1208                 SlapReply frs = { REP_RESULT };
1209                 int rc;
1210                 Filter mf, af;
1211                 AttributeAssertion eq;
1212                 slap_callback cb = {0};
1213
1214                 fop = *op;
1215
1216                 fop.o_sync_mode = 0;
1217                 fop.o_callback = &cb;
1218                 fop.ors_limit = NULL;
1219                 fop.ors_tlimit = SLAP_NO_LIMIT;
1220                 fop.ors_attrs = slap_anlist_all_attributes;
1221                 fop.ors_attrsonly = 0;
1222                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1223
1224                 af.f_choice = LDAP_FILTER_AND;
1225                 af.f_next = NULL;
1226                 af.f_and = &mf;
1227                 mf.f_choice = LDAP_FILTER_EQUALITY;
1228                 mf.f_ava = &eq;
1229                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1230                 mf.f_next = fop.ors_filter;
1231
1232                 fop.ors_filter = &af;
1233
1234                 cb.sc_response = playlog_cb;
1235                 fop.o_bd->bd_info = on->on_info->oi_orig;
1236
1237                 for ( i=ndel; i<num; i++ ) {
1238                         if ( uuids[i].bv_len == 0 ) continue;
1239
1240                         mf.f_av_value = uuids[i];
1241                         cb.sc_private = NULL;
1242                         fop.ors_slimit = 1;
1243                         rc = fop.o_bd->be_search( &fop, &frs );
1244
1245                         /* If entry was not found, add to delete list */
1246                         if ( !cb.sc_private ) {
1247                                 uuids[ndel++] = uuids[i];
1248                         }
1249                 }
1250                 fop.o_bd->bd_info = (BackendInfo *)on;
1251         }
1252         if ( ndel ) {
1253                 uuids[ndel].bv_val = NULL;
1254                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
1255         }
1256 }
1257
1258 static int
1259 syncprov_op_response( Operation *op, SlapReply *rs )
1260 {
1261         opcookie *opc = op->o_callback->sc_private;
1262         slap_overinst *on = opc->son;
1263         syncprov_info_t         *si = on->on_bi.bi_private;
1264         syncmatches *sm;
1265
1266         if ( rs->sr_err == LDAP_SUCCESS )
1267         {
1268                 struct berval maxcsn = BER_BVNULL, curcsn = BER_BVNULL;
1269                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1270
1271                 /* Update our context CSN */
1272                 cbuf[0] = '\0';
1273                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1274                 slap_get_commit_csn( op, &maxcsn, &curcsn );
1275                 if ( !BER_BVISNULL( &maxcsn ) ) {
1276                         strcpy( cbuf, maxcsn.bv_val );
1277                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
1278                                 strcpy( si->si_ctxcsnbuf, cbuf );
1279                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
1280                         }
1281                 }
1282
1283                 si->si_numops++;
1284                 if ( si->si_chkops || si->si_chktime ) {
1285                         int do_check=0;
1286                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1287                                 do_check = 1;
1288                                 si->si_numops = 0;
1289                         }
1290                         if ( si->si_chktime &&
1291                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1292                                 do_check = 1;
1293                                 si->si_chklast = op->o_time;
1294                         }
1295                         if ( do_check ) {
1296                                 syncprov_checkpoint( op, rs, on );
1297                         }
1298                 }
1299                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1300
1301                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1302                 opc->sctxcsn.bv_val = cbuf;
1303
1304                 /* Handle any persistent searches */
1305                 if ( si->si_ops ) {
1306                         switch(op->o_tag) {
1307                         case LDAP_REQ_ADD:
1308                         case LDAP_REQ_MODIFY:
1309                         case LDAP_REQ_MODRDN:
1310                         case LDAP_REQ_EXTENDED:
1311                                 syncprov_matchops( op, opc, 0 );
1312                                 break;
1313                         case LDAP_REQ_DELETE:
1314                                 /* for each match in opc->smatches:
1315                                  *   send DELETE msg
1316                                  */
1317                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1318                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1319                                         if ( sm->sm_op->s_op->o_abandon )
1320                                                 continue;
1321                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
1322                                                 LDAP_SYNC_DELETE, 1 );
1323                                 }
1324                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1325                                 break;
1326                         }
1327                 }
1328
1329                 /* Add any log records */
1330                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1331                         syncprov_add_slog( op, &curcsn );
1332                 }
1333
1334         }
1335         return SLAP_CB_CONTINUE;
1336 }
1337
1338 /* We don't use a subentry to store the context CSN any more.
1339  * We expose the current context CSN as an operational attribute
1340  * of the suffix entry.
1341  */
1342 static int
1343 syncprov_op_compare( Operation *op, SlapReply *rs )
1344 {
1345         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1346         syncprov_info_t         *si = on->on_bi.bi_private;
1347         int rc = SLAP_CB_CONTINUE;
1348
1349         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1350                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1351         {
1352                 Entry e = {0};
1353                 Attribute a = {0};
1354                 struct berval bv[2];
1355
1356                 e.e_name = op->o_bd->be_suffix[0];
1357                 e.e_nname = op->o_bd->be_nsuffix[0];
1358
1359                 BER_BVZERO( &bv[1] );
1360                 bv[0] = si->si_ctxcsn;
1361
1362                 a.a_desc = slap_schema.si_ad_contextCSN;
1363                 a.a_vals = bv;
1364                 a.a_nvals = a.a_vals;
1365
1366                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1367
1368                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1369                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1370                 if ( ! rs->sr_err ) {
1371                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1372                         goto return_results;
1373                 }
1374
1375                 if ( get_assert( op ) &&
1376                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1377                 {
1378                         rs->sr_err = LDAP_ASSERTION_FAILED;
1379                         goto return_results;
1380                 }
1381
1382
1383                 rs->sr_err = LDAP_COMPARE_FALSE;
1384
1385                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
1386                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1387                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1388                                 a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
1389                 {
1390                         rs->sr_err = LDAP_COMPARE_TRUE;
1391                 }
1392
1393 return_results:;
1394
1395                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1396
1397                 send_ldap_result( op, rs );
1398
1399                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1400                         rs->sr_err = LDAP_SUCCESS;
1401                 }
1402                 rc = rs->sr_err;
1403         }
1404
1405         return rc;
1406 }
1407
1408 static int
1409 syncprov_op_mod( Operation *op, SlapReply *rs )
1410 {
1411         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1412         syncprov_info_t         *si = on->on_bi.bi_private;
1413
1414         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1415                 sizeof(opcookie) +
1416                 (si->si_ops ? sizeof(modinst) : 0 ),
1417                 op->o_tmpmemctx);
1418         opcookie *opc = (opcookie *)(cb+1);
1419         opc->son = on;
1420         cb->sc_response = syncprov_op_response;
1421         cb->sc_cleanup = syncprov_op_cleanup;
1422         cb->sc_private = opc;
1423         cb->sc_next = op->o_callback;
1424         op->o_callback = cb;
1425
1426         /* If there are active persistent searches, lock this operation.
1427          * See seqmod.c for the locking logic on its own.
1428          */
1429         if ( si->si_ops ) {
1430                 modtarget *mt, mtdummy;
1431                 modinst *mi;
1432
1433                 mi = (modinst *)(opc+1);
1434                 mi->mi_op = op;
1435
1436                 /* See if we're already modifying this entry... */
1437                 mtdummy.mt_op = op;
1438                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1439                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1440                 if ( mt ) {
1441                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1442                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1443                         mt->mt_tail->mi_next = mi;
1444                         mt->mt_tail = mi;
1445                         /* wait for this op to get to head of list */
1446                         while ( mt->mt_mods != mi ) {
1447                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1448                                 ldap_pvt_thread_yield();
1449                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1450                         }
1451                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1452                 } else {
1453                         /* Record that we're modifying this entry now */
1454                         mt = ch_malloc( sizeof(modtarget) );
1455                         mt->mt_mods = mi;
1456                         mt->mt_tail = mi;
1457                         mt->mt_op = mi->mi_op;
1458                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1459                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1460                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1461                 }
1462         }
1463
1464         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1465                 syncprov_matchops( op, opc, 1 );
1466
1467
1468         return SLAP_CB_CONTINUE;
1469 }
1470
1471 static int
1472 syncprov_op_extended( Operation *op, SlapReply *rs )
1473 {
1474         if ( exop_is_write( op ))
1475                 return syncprov_op_mod( op, rs );
1476
1477         return SLAP_CB_CONTINUE;
1478 }
1479
1480 typedef struct searchstate {
1481         slap_overinst *ss_on;
1482         syncops *ss_so;
1483         int ss_present;
1484 } searchstate;
1485
1486 static int
1487 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1488 {
1489         if ( rs->sr_ctrls ) {
1490                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1491                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1492                 rs->sr_ctrls = NULL;
1493         }
1494         return 0;
1495 }
1496
1497 static void
1498 syncprov_detach_op( Operation *op, syncops *so )
1499 {
1500         Operation *op2;
1501         int i, alen = 0;
1502         size_t size;
1503         char *ptr;
1504
1505         /* count the search attrs */
1506         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1507                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1508         }
1509         /* Make a new copy of the operation */
1510         size = sizeof(Operation) + sizeof(Opheader) +
1511                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1512                 op->o_req_dn.bv_len + 1 +
1513                 op->o_req_ndn.bv_len + 1 +
1514                 op->o_ndn.bv_len + 1 +
1515                 so->s_filterstr.bv_len + 1;
1516         op2 = (Operation *)ch_malloc( size );
1517         *op2 = *op;
1518         op2->o_hdr = (Opheader *)(op2+1);
1519         *op2->o_hdr = *op->o_hdr;
1520         if ( i ) {
1521                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
1522                 ptr = (char *)(op2->ors_attrs+i+1);
1523                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1524                         op2->ors_attrs[i] = op->ors_attrs[i];
1525                         op2->ors_attrs[i].an_name.bv_val = ptr;
1526                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1527                 }
1528                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1529         } else {
1530                 ptr = (char *)(op2->o_hdr + 1);
1531         }
1532         op2->o_ndn.bv_val = ptr;
1533         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1534         op2->o_dn = op2->o_ndn;
1535         op2->o_req_dn.bv_val = ptr;
1536         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1537         op2->o_req_ndn.bv_val = ptr;
1538         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1539         op2->ors_filterstr.bv_val = ptr;
1540         strcpy( ptr, so->s_filterstr.bv_val );
1541         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1542         op2->ors_filter = str2filter( ptr );
1543         op2->o_controls = NULL;
1544         op2->o_callback = NULL;
1545         so->s_op = op2;
1546
1547         /* Increment number of ops so that idletimeout ignores us */
1548         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1549         op->o_conn->c_n_ops_executing++;
1550         op->o_conn->c_n_ops_completed--;
1551         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1552 }
1553
1554 static int
1555 syncprov_search_response( Operation *op, SlapReply *rs )
1556 {
1557         searchstate *ss = op->o_callback->sc_private;
1558         slap_overinst *on = ss->ss_on;
1559         syncprov_info_t         *si = on->on_bi.bi_private;
1560         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1561
1562         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1563                 int i;
1564                 /* If we got a referral without a referral object, there's
1565                  * something missing that we cannot replicate. Just ignore it.
1566                  * The consumer will abort because we didn't send the expected
1567                  * control.
1568                  */
1569                 if ( !rs->sr_entry ) {
1570                         assert( rs->sr_entry );
1571                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1572                         return SLAP_CB_CONTINUE;
1573                 }
1574                 if ( srs->sr_state.ctxcsn ) {
1575                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
1576                                 slap_schema.si_ad_entryCSN );
1577                         /* Don't send the ctx entry twice */
1578                         if ( bvmatch( &a->a_nvals[0], srs->sr_state.ctxcsn ))
1579                                 return LDAP_SUCCESS;
1580                 }
1581                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1582                         op->o_tmpmemctx );
1583                 rs->sr_ctrls[1] = NULL;
1584                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1585                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1586         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1587                 struct berval cookie;
1588
1589                 slap_compose_sync_cookie( op, &cookie,
1590                         &op->ors_filter->f_and->f_ava->aa_value,
1591                         srs->sr_state.sid, srs->sr_state.rid );
1592
1593                 /* Is this a regular refresh? */
1594                 if ( !ss->ss_so ) {
1595                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1596                                 op->o_tmpmemctx );
1597                         rs->sr_ctrls[1] = NULL;
1598                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1599                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1600                                         LDAP_SYNC_REFRESH_DELETES );
1601                 } else {
1602                         int locked = 0;
1603                 /* It's RefreshAndPersist, transition to Persist phase */
1604                         syncprov_sendinfo( op, rs, ss->ss_present ?
1605                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1606                                 &cookie, 1, NULL, 0 );
1607                         /* Flush any queued persist messages */
1608                         if ( ss->ss_so->s_res ) {
1609                                 syncres *sr, *srnext;
1610                                 Entry *e;
1611                                 opcookie opc;
1612
1613                                 opc.son = on;
1614                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
1615                                 locked = 1;
1616                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
1617                                         int rc = LDAP_SUCCESS;
1618                                         srnext = sr->s_next;
1619                                         opc.sdn = sr->s_dn;
1620                                         opc.sndn = sr->s_ndn;
1621                                         opc.suuid = sr->s_uuid;
1622                                         opc.sctxcsn = sr->s_csn;
1623                                         opc.sreference = sr->s_isreference;
1624                                         e = NULL;
1625
1626                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
1627                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1628                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
1629                                                 op->o_bd->bd_info = (BackendInfo *)on;
1630                                         }
1631                                         if ( rc == LDAP_SUCCESS )
1632                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
1633                                                         sr->s_mode, 0 );
1634
1635                                         if ( e ) {
1636                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1637                                                 be_entry_release_r( op, e );
1638                                                 op->o_bd->bd_info = (BackendInfo *)on;
1639                                         }
1640                                         ch_free( sr );
1641                                 }
1642                                 ss->ss_so->s_res = NULL;
1643                                 ss->ss_so->s_restail = NULL;
1644                         }
1645
1646                         /* Turn off the refreshing flag */
1647                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
1648                         if ( locked )
1649                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
1650
1651                         /* Detach this Op from frontend control */
1652                         syncprov_detach_op( op, ss->ss_so );
1653
1654                         return LDAP_SUCCESS;
1655                 }
1656         }
1657
1658         return SLAP_CB_CONTINUE;
1659 }
1660
1661 static int
1662 syncprov_op_search( Operation *op, SlapReply *rs )
1663 {
1664         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1665         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1666         slap_callback   *cb;
1667         int gotstate = 0, nochange = 0, do_present = 1;
1668         Filter *fand, *fava;
1669         syncops *sop = NULL;
1670         searchstate *ss;
1671         sync_control *srs;
1672         struct berval ctxcsn;
1673         char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1674
1675         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
1676
1677         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1678                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
1679                 return rs->sr_err;
1680         }
1681
1682         srs = op->o_controls[slap_cids.sc_LDAPsync];
1683
1684         /* If this is a persistent search, set it up right away */
1685         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
1686                 syncops so = {0};
1687                 fbase_cookie fc;
1688                 opcookie opc;
1689                 slap_callback sc;
1690
1691                 fc.fss = &so;
1692                 fc.fbase = 0;
1693                 so.s_eid = NOID;
1694                 so.s_op = op;
1695                 so.s_flags = PS_IS_REFRESHING;
1696                 /* syncprov_findbase expects to be called as a callback... */
1697                 sc.sc_private = &opc;
1698                 opc.son = on;
1699                 cb = op->o_callback;
1700                 op->o_callback = &sc;
1701                 rs->sr_err = syncprov_findbase( op, &fc );
1702                 op->o_callback = cb;
1703
1704                 if ( rs->sr_err != LDAP_SUCCESS ) {
1705                         send_ldap_result( op, rs );
1706                         return rs->sr_err;
1707                 }
1708                 sop = ch_malloc( sizeof( syncops ));
1709                 *sop = so;
1710                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
1711                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1712                 sop->s_sid = srs->sr_state.sid;
1713                 sop->s_rid = srs->sr_state.rid;
1714                 sop->s_next = si->si_ops;
1715                 sop->s_inuse = 1;
1716                 si->si_ops = sop;
1717                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1718         }
1719
1720         /* snapshot the ctxcsn */
1721         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1722         strcpy( csnbuf, si->si_ctxcsnbuf );
1723         ctxcsn.bv_len = si->si_ctxcsn.bv_len;
1724         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1725         ctxcsn.bv_val = csnbuf;
1726
1727         /* If we have a cookie, handle the PRESENT lookups */
1728         if ( srs->sr_state.ctxcsn ) {
1729                 sessionlog *sl;
1730
1731                 /* Is the CSN in a valid format? */
1732                 if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
1733                         send_ldap_error( op, rs, LDAP_OTHER, "invalid sync cookie" );
1734                         return rs->sr_err;
1735                 }
1736                 /* If just Refreshing and nothing has changed, shortcut it */
1737                 if ( bvmatch( srs->sr_state.ctxcsn, &ctxcsn )) {
1738                         nochange = 1;
1739                         if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1740                                 LDAPControl     *ctrls[2];
1741
1742                                 ctrls[0] = NULL;
1743                                 ctrls[1] = NULL;
1744                                 syncprov_done_ctrl( op, rs, ctrls, 0, 0,
1745                                         NULL, LDAP_SYNC_REFRESH_DELETES );
1746                                 rs->sr_ctrls = ctrls;
1747                                 rs->sr_err = LDAP_SUCCESS;
1748                                 send_ldap_result( op, rs );
1749                                 rs->sr_ctrls = NULL;
1750                                 return rs->sr_err;
1751                         }
1752                         goto shortcut;
1753                 }
1754                 /* Do we have a sessionlog for this search? */
1755                 for ( sl=si->si_logs; sl; sl=sl->sl_next )
1756                         if ( sl->sl_sid == srs->sr_state.sid ) break;
1757                 if ( sl ) {
1758                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1759                         if ( ber_bvcmp( srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
1760                                 do_present = 0;
1761                                 /* mutex is unlocked in playlog */
1762                                 syncprov_playlog( op, rs, sl, srs->sr_state.ctxcsn, &ctxcsn );
1763                         } else {
1764                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1765                         }
1766                 }
1767                 /* Is the CSN still present in the database? */
1768                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
1769                         /* No, so a reload is required */
1770 #if 0           /* the consumer doesn't seem to send this hint */
1771                         if ( op->o_sync_rhint == 0 ) {
1772                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
1773                                 return rs->sr_err;
1774                         }
1775 #endif
1776                 } else {
1777                         gotstate = 1;
1778                         /* If changed and doing Present lookup, send Present UUIDs */
1779                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
1780                                 LDAP_SUCCESS ) {
1781                                 send_ldap_result( op, rs );
1782                                 return rs->sr_err;
1783                         }
1784                 }
1785         }
1786
1787         /* Append CSN range to search filter, save original filter
1788          * for persistent search evaluation
1789          */
1790         if ( sop ) {
1791                 sop->s_filterstr= op->ors_filterstr;
1792         }
1793
1794         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1795         fand->f_choice = LDAP_FILTER_AND;
1796         fand->f_next = NULL;
1797         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1798         fava->f_choice = LDAP_FILTER_LE;
1799         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1800         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1801         ber_dupbv_x( &fava->f_ava->aa_value, &ctxcsn, op->o_tmpmemctx );
1802         fand->f_and = fava;
1803         if ( gotstate ) {
1804                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1805                 fava = fava->f_next;
1806                 fava->f_choice = LDAP_FILTER_GE;
1807                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1808                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1809                 ber_dupbv_x( &fava->f_ava->aa_value, srs->sr_state.ctxcsn, op->o_tmpmemctx );
1810         }
1811         fava->f_next = op->ors_filter;
1812         op->ors_filter = fand;
1813         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1814
1815 shortcut:
1816         /* Let our callback add needed info to returned entries */
1817         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1818         ss = (searchstate *)(cb+1);
1819         ss->ss_on = on;
1820         ss->ss_so = sop;
1821         ss->ss_present = do_present;
1822         cb->sc_response = syncprov_search_response;
1823         cb->sc_cleanup = syncprov_search_cleanup;
1824         cb->sc_private = ss;
1825         cb->sc_next = op->o_callback;
1826         op->o_callback = cb;
1827
1828 #if 0   /* I don't think we need to shortcircuit back-bdb any more */
1829         op->o_sync_mode &= SLAP_CONTROL_MASK;
1830 #endif
1831
1832         /* If this is a persistent search and no changes were reported during
1833          * the refresh phase, just invoke the response callback to transition
1834          * us into persist phase
1835          */
1836         if ( nochange ) {
1837                 rs->sr_err = LDAP_SUCCESS;
1838                 rs->sr_nentries = 0;
1839                 send_ldap_result( op, rs );
1840                 return rs->sr_err;
1841         }
1842         return SLAP_CB_CONTINUE;
1843 }
1844
1845 static int
1846 syncprov_operational(
1847         Operation *op,
1848         SlapReply *rs )
1849 {
1850         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1851         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1852
1853         if ( rs->sr_entry &&
1854                 dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
1855
1856                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
1857                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
1858                         Attribute *a, **ap = NULL;
1859
1860                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
1861                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
1862                                         break;
1863                         }
1864
1865                         if ( !a ) {
1866                                 for ( ap = &rs->sr_operational_attrs; *ap; ap=&(*ap)->a_next );
1867
1868                                 a = ch_malloc( sizeof(Attribute));
1869                                 a->a_desc = slap_schema.si_ad_contextCSN;
1870                                 a->a_vals = ch_malloc( 2 * sizeof(struct berval));
1871                                 a->a_vals[1].bv_val = NULL;
1872                                 a->a_nvals = a->a_vals;
1873                                 a->a_next = NULL;
1874                                 a->a_flags = 0;
1875                                 *ap = a;
1876                         }
1877
1878                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1879                         if ( !ap ) {
1880                                 strcpy( a->a_vals[0].bv_val, si->si_ctxcsnbuf );
1881                         } else {
1882                                 ber_dupbv( &a->a_vals[0], &si->si_ctxcsn );
1883                         }
1884                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1885                 }
1886         }
1887         return SLAP_CB_CONTINUE;
1888 }
1889
1890 static int
1891 syncprov_db_config(
1892         BackendDB       *be,
1893         const char      *fname,
1894         int             lineno,
1895         int             argc,
1896         char    **argv
1897 )
1898 {
1899         slap_overinst           *on = (slap_overinst *)be->bd_info;
1900         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1901
1902         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1903                 if ( argc != 3 ) {
1904                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1905                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1906                         return -1;
1907                 }
1908                 si->si_chkops = atoi( argv[1] );
1909                 si->si_chktime = atoi( argv[2] ) * 60;
1910                 return 0;
1911
1912         } else if ( strcasecmp( argv[0], "syncprov-sessionlog" ) == 0 ) {
1913                 sessionlog *sl;
1914                 int sid, size;
1915                 if ( argc != 3 ) {
1916                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1917                                 "\"syncprov-sessionlog <sid> <size>\"\n", fname, lineno );
1918                         return -1;
1919                 }
1920                 sid = atoi( argv[1] );
1921                 if ( sid < 0 || sid > 999 ) {
1922                         fprintf( stderr,
1923                                 "%s: line %d: session log id %d is out of range [0..999]\n",
1924                                 fname, lineno, sid );
1925                         return -1;
1926                 }
1927                 size = atoi( argv[2] );
1928                 if ( size < 0 ) {
1929                         fprintf( stderr,
1930                                 "%s: line %d: session log size %d is negative\n",
1931                                 fname, lineno, size );
1932                         return -1;
1933                 }
1934                 for ( sl = si->si_logs; sl; sl=sl->sl_next ) {
1935                         if ( sl->sl_sid == sid ) {
1936                                 sl->sl_size = size;
1937                                 break;
1938                         }
1939                 }
1940                 if ( !sl ) {
1941                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
1942                         sl->sl_mincsn.bv_val = (char *)(sl+1);
1943                         sl->sl_mincsn.bv_len = 0;
1944                         sl->sl_sid = sid;
1945                         sl->sl_size = size;
1946                         sl->sl_num = 0;
1947                         sl->sl_head = sl->sl_tail = NULL;
1948                         sl->sl_next = si->si_logs;
1949                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
1950                         si->si_logs = sl;
1951                 }
1952                 return 0;
1953         }
1954
1955         return SLAP_CONF_UNKNOWN;
1956 }
1957
1958 /* Cheating - we have no thread pool context for these functions,
1959  * so make one.
1960  */
1961 typedef struct thread_keys {
1962         void *key;
1963         void *data;
1964         ldap_pvt_thread_pool_keyfree_t *xfree;
1965 } thread_keys;
1966
1967 #define MAXKEYS 32
1968 /* A fake thread context */
1969 static thread_keys thrctx[MAXKEYS];
1970
1971 /* Read any existing contextCSN from the underlying db.
1972  * Then search for any entries newer than that. If no value exists,
1973  * just generate it. Cache whatever result.
1974  */
1975 static int
1976 syncprov_db_open(
1977     BackendDB *be
1978 )
1979 {
1980         slap_overinst   *on = (slap_overinst *) be->bd_info;
1981         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1982
1983         Connection conn;
1984         char opbuf[OPERATION_BUFFER_SIZE];
1985         char ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1986         Operation *op = (Operation *)opbuf;
1987         Entry *e;
1988         Attribute *a;
1989         int rc;
1990
1991         connection_fake_init( &conn, op, thrctx );
1992         op->o_bd = be;
1993         op->o_dn = be->be_rootdn;
1994         op->o_ndn = be->be_rootndn;
1995
1996         ctxcsnbuf[0] = '\0';
1997
1998         op->o_bd->bd_info = on->on_info->oi_orig;
1999         rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
2000                 slap_schema.si_ad_contextCSN, 0, &e );
2001
2002         if ( e ) {
2003                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2004                 if ( a ) {
2005                         si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
2006                         if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
2007                                 si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
2008                         strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
2009                                 si->si_ctxcsn.bv_len );
2010                         si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
2011                         strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
2012                 }
2013                 be_entry_release_r( op, e );
2014                 op->o_bd->bd_info = (BackendInfo *)on;
2015                 op->o_req_dn = be->be_suffix[0];
2016                 op->o_req_ndn = be->be_nsuffix[0];
2017                 op->ors_scope = LDAP_SCOPE_SUBTREE;
2018                 syncprov_findcsn( op, FIND_MAXCSN );
2019         }
2020
2021         if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
2022                 slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
2023                                 &si->si_ctxcsn, 0 );
2024         }
2025
2026         /* If our ctxcsn is different from what was read from the root
2027          * entry, write the new value out.
2028          */
2029         if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
2030                 SlapReply rs = {REP_RESULT};
2031                 syncprov_checkpoint( op, &rs, on );
2032         }
2033
2034         op->o_bd->bd_info = (BackendInfo *)on;
2035         return 0;
2036 }
2037
2038 /* Write the current contextCSN into the underlying db.
2039  */
2040 static int
2041 syncprov_db_close(
2042     BackendDB *be
2043 )
2044 {
2045     slap_overinst   *on = (slap_overinst *) be->bd_info;
2046     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2047         int i;
2048
2049         if ( si->si_numops ) {
2050                 Connection conn;
2051                 char opbuf[OPERATION_BUFFER_SIZE];
2052                 Operation *op = (Operation *)opbuf;
2053                 SlapReply rs = {REP_RESULT};
2054
2055                 connection_fake_init( &conn, op, thrctx );
2056                 op->o_bd = be;
2057                 op->o_dn = be->be_rootdn;
2058                 op->o_ndn = be->be_rootndn;
2059                 syncprov_checkpoint( op, &rs, on );
2060         }
2061         for ( i=0; thrctx[i].key; i++) {
2062                 if ( thrctx[i].xfree )
2063                         thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
2064                 thrctx[i].key = NULL;
2065         }
2066
2067     return 0;
2068 }
2069
2070 static int
2071 syncprov_db_init(
2072         BackendDB *be
2073 )
2074 {
2075         slap_overinst   *on = (slap_overinst *)be->bd_info;
2076         syncprov_info_t *si;
2077
2078         si = ch_calloc(1, sizeof(syncprov_info_t));
2079         on->on_bi.bi_private = si;
2080         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
2081         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2082         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2083         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
2084
2085         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2086         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2087
2088         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2089         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2090
2091         return 0;
2092 }
2093
2094 static int
2095 syncprov_db_destroy(
2096         BackendDB *be
2097 )
2098 {
2099         slap_overinst   *on = (slap_overinst *)be->bd_info;
2100         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2101
2102         if ( si ) {
2103                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2104                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2105                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
2106                 ch_free( si );
2107         }
2108
2109         return 0;
2110 }
2111
2112 static int syncprov_parseCtrl (
2113         Operation *op,
2114         SlapReply *rs,
2115         LDAPControl *ctrl )
2116 {
2117         ber_tag_t tag;
2118         BerElement *ber;
2119         ber_int_t mode;
2120         ber_len_t len;
2121         struct berval cookie = BER_BVNULL;
2122         sync_control *sr;
2123         int rhint = 0;
2124
2125         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2126                 rs->sr_text = "Sync control specified multiple times";
2127                 return LDAP_PROTOCOL_ERROR;
2128         }
2129
2130         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2131                 rs->sr_text = "Sync control specified with pagedResults control";
2132                 return LDAP_PROTOCOL_ERROR;
2133         }
2134
2135         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2136                 rs->sr_text = "Sync control value is empty (or absent)";
2137                 return LDAP_PROTOCOL_ERROR;
2138         }
2139
2140         /* Parse the control value
2141          *      syncRequestValue ::= SEQUENCE {
2142          *              mode   ENUMERATED {
2143          *                      -- 0 unused
2144          *                      refreshOnly             (1),
2145          *                      -- 2 reserved
2146          *                      refreshAndPersist       (3)
2147          *              },
2148          *              cookie  syncCookie OPTIONAL
2149          *      }
2150          */
2151
2152         ber = ber_init( &ctrl->ldctl_value );
2153         if( ber == NULL ) {
2154                 rs->sr_text = "internal error";
2155                 return LDAP_OTHER;
2156         }
2157
2158         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2159                 rs->sr_text = "Sync control : mode decoding error";
2160                 return LDAP_PROTOCOL_ERROR;
2161         }
2162
2163         switch( mode ) {
2164         case LDAP_SYNC_REFRESH_ONLY:
2165                 mode = SLAP_SYNC_REFRESH;
2166                 break;
2167         case LDAP_SYNC_REFRESH_AND_PERSIST:
2168                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2169                 break;
2170         default:
2171                 rs->sr_text = "Sync control : unknown update mode";
2172                 return LDAP_PROTOCOL_ERROR;
2173         }
2174
2175         tag = ber_peek_tag( ber, &len );
2176
2177         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2178                 if (( ber_scanf( ber, /*{*/ "o", &cookie )) == LBER_ERROR ) {
2179                         rs->sr_text = "Sync control : cookie decoding error";
2180                         return LDAP_PROTOCOL_ERROR;
2181                 }
2182         }
2183         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2184                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2185                         rs->sr_text = "Sync control : rhint decoding error";
2186                         return LDAP_PROTOCOL_ERROR;
2187                 }
2188         }
2189         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2190                         rs->sr_text = "Sync control : decoding error";
2191                         return LDAP_PROTOCOL_ERROR;
2192         }
2193         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2194         sr->sr_rhint = rhint;
2195         if (!BER_BVISNULL(&cookie)) {
2196                 ber_bvarray_add( &sr->sr_state.octet_str, &cookie );
2197                 slap_parse_sync_cookie( &sr->sr_state );
2198         }
2199
2200         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2201
2202         (void) ber_free( ber, 1 );
2203
2204         op->o_sync = ctrl->ldctl_iscritical
2205                 ? SLAP_CONTROL_CRITICAL
2206                 : SLAP_CONTROL_NONCRITICAL;
2207
2208         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2209
2210         return LDAP_SUCCESS;
2211 }
2212
2213 /* This overlay is set up for dynamic loading via moduleload. For static
2214  * configuration, you'll need to arrange for the slap_overinst to be
2215  * initialized and registered by some other function inside slapd.
2216  */
2217
2218 static slap_overinst            syncprov;
2219
2220 int
2221 syncprov_init()
2222 {
2223         int rc;
2224
2225         rc = register_supported_control( LDAP_CONTROL_SYNC,
2226                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
2227                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2228         if ( rc != LDAP_SUCCESS ) {
2229                 fprintf( stderr, "Failed to register control %d\n", rc );
2230                 return rc;
2231         }
2232
2233         syncprov.on_bi.bi_type = "syncprov";
2234         syncprov.on_bi.bi_db_init = syncprov_db_init;
2235         syncprov.on_bi.bi_db_config = syncprov_db_config;
2236         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2237         syncprov.on_bi.bi_db_open = syncprov_db_open;
2238         syncprov.on_bi.bi_db_close = syncprov_db_close;
2239
2240         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2241         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2242
2243         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2244         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2245         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2246         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2247         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2248         syncprov.on_bi.bi_op_search = syncprov_op_search;
2249         syncprov.on_bi.bi_extended = syncprov_op_extended;
2250         syncprov.on_bi.bi_operational = syncprov_operational;
2251
2252         return overlay_register( &syncprov );
2253 }
2254
2255 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2256 int
2257 init_module( int argc, char *argv[] )
2258 {
2259         return syncprov_init();
2260 }
2261 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2262
2263 #endif /* defined(SLAPD_OVER_SYNCPROV) */